JPS6227429Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a cap that allows the lead to automatically extend when the cap body is fixed to the rear of the sharp pencil body during use, allowing immediate writing. This relates to formula sharpening pencils.

(Prior art and its problems) Conventionally, cap-type sharp pencils such as those disclosed in Utility Model Publication No. 50-24846 have been designed to protect the tip, be convenient to carry, and have a cap body at the rear of the sharp pencil body. Although it has practical effects such as the lead can be drawn out by the same operation as a normal lock-type sharp pencil, when in use, after attaching the cap body to the rear of the sharp pencil body, Initial centering must be performed by performing the knock operation again, and there remains room for improvement in terms of operational complexity.

(Purpose of the invention) The purpose of the invention is to provide a cap-type sharp pencil whose lead can be automatically fed out when the cap body is attached to the rear of the sharp pencil body during use, allowing immediate writing. be.

(Summary of the invention) The present invention consists of a shaft cylinder with a reduced diameter section at the rear, a core storage cylinder into which a knock cap is fitted in the rear part, and a core storage cylinder connected to the cylinder, which can be pushed backward by an elastic member. A sharp pencil main body comprising a biased lead gripping means and a lead-carrying member disposed in the tip of the barrel; a cap barrel having a through hole at the rear; The cap has a locking portion provided therein, and a diameter-reducing locking portion having an outwardly projecting portion that engages with the locking portion and capable of contracting in diameter, and is biased forward by an elastic member. The cap body consists of a pressing body placed in the cylinder, and when the cap body is fixed to the rear part of the sharp pencil body, the diameter reduction locking part connects the outer peripheral surface of the outward protruding part to the contraction of the shaft cylinder. Until the outer protruding portion is closed by sliding on the diameter portion and the engagement between the outward protruding portion and the locking portion is disengaged, the lock cap is pressed forward by the pressing body to advance the lead gripping means and to feed out the lead; After the engagement is released, the pressing body is moved by the elastic force of the resilient member which urges the lead gripping means backward against the resilient force of the resilient member which urges the pressing body forward. The gist of this is a cap-type sharp pencil in which the cap is pushed backward by a force-retracted cap to protrude from the rear end of the cap barrel, and it meets the above-mentioned purpose.

(Example) Hereinafter, the present invention will be described in detail based on an example shown in the accompanying drawings. In the description, "front" refers to the left direction in the drawing, and "rear" refers to the right direction in the drawing.

In FIG. 1, A indicates the main body of the mechanical pencil. Reference numeral 1 indicates a barrel made of resin, metal, etc. Inside the barrel 1, a lead gripping means 3 made of a collection chuck or the like with a lead storage barrel 2 connected to the rear part is installed to hold the barrel 1 and the core storage. It is disposed so as to be biased rearward by a resilient member 4 made of a coil spring or the like interposed between the cylinder 2 and the cylinder 2. Reference numeral 5 is a tightening ring for opening and closing the lead gripping means 3. At the front of the shaft tube 1, there is a tip 7 attached to the front inside thereof a core-carrying member 6 that elastically holds the core L in contact with the outer periphery of the core L.
are connected. Reference number 8 is an annular recess for fitting when a cap barrel 10, which will be described later, is fixed to the rear part of the shaft barrel 1, and reference number 9 is an annular recess for fitting the cap barrel 10, which will be described later, to the rear part of the shaft barrel 1.
It is a notch cap fitted on the rear of the
The knob cap 9 does not necessarily have to protrude from the rear end of the barrel 1, but can be placed in the rear of the barrel 1 by forming a protrusion at the front end of a pressing body 15 in the cap barrel 10, which will be described later. You can also do it. Reference numeral 1a indicates a pressing body 15 when a cap body B, which will be described later, is fixed to the rear part of a sharp pencil body A.
This is a tapered diameter reduced portion provided so as to be in sliding contact with the outer circumferential surface of the outwardly protruding portion 14 .

B indicates the cap body. Reference numeral 10 is a cap tube made of resin, metal, etc., and having a through hole 11 at the rear, and the cap tube 10 engages with an outward protrusion 14 of a pressing body 15, which will be described later, at an intermediate portion of the inner surface thereof. It has a step-shaped locking part 12, and further, inside the cap barrel 10, there is an outwardly protruding part 14 that engages with the locking part 12.
A pressing body 15 is interposed between the cap barrel 10 and the pressing body 15, and the pressing body 15 has a diameter reduction locking portion 13 that can be reduced in diameter by forming a slit 15a in the longitudinal direction. It is placed so as to be biased forward by a resilient member 16 made of a spring, magnet, or the like. Reference numeral 17 is a protrusion that fits into the recess 8 of the barrel 1 when the cap body B is fixed to the barrel 1 of the sharp pencil body A;
is a stepped portion for positioning the pressing body 15.

It should be noted that various shapes can be adopted for the diameter reduction part 1a and the outward protrusion part 14 in the above embodiment as long as the diameter reduction locking part 13 of the pressing body 15 can be reduced in diameter. The diameter reduction locking portion 13 and the pressing body 15 may be formed separately.

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

When the cap barrel 10 is fitted from the rear of the shaft barrel 1, the tip of the pressing body 15 and the knock cap 9 come into contact.
At this stage, the pressing body 15 engages the outward protrusion 14 of the diameter-reducing locking part 13 with the locking part 12 and does not move back. 9 is pressed forward, which causes the lead gripping means 3 to hold the lead L through the lead storage tube 2.
move forward while holding it, and then the tightening by the tightening ring 5 is released and the core L is released (second
(see figure). On the other hand, following this operation, the outer circumferential surface of the outwardly protruding part 14 of the diameter-reducing locking part 13 slides into contact with the diameter-reducing part 1a at the rear of the shaft cylinder 1 and is closed. The engaged outward protrusion 14 is disengaged. Since the elastic force of the elastic member 16 that urges the pressing body 15 forward is weaker than the elastic force of the elastic member 4 that urges the lead storage cylinder 2 and the lead gripping means 3 backward, the above-mentioned engagement Upon release, the lead gripping means 3 retreats due to the elastic force of the resilient member 4 and is tightened again by the tightening ring 5 to grip the lead L, and the pressing body 15 retreats due to the resilient force of the resilient member 4. It is pushed backward by the knock cap 9 and protrudes from the rear end of the cap barrel 10. After this operation, the protrusion 17 of the cap barrel 10 and the shaft barrel 1
The recessed portion 8 is fitted to complete the fastening (see Fig. 3). After the cap barrel 10 is fixed to the shaft barrel 1, the outward protruding portion 14 does not engage with the locking portion 12 even if the pressing body 15 is pressed.
By pressing with a fingertip, the lead L can be drawn out in the same way as with a conventional cap-type mechanical pencil.

(Effects of the invention) As described above, according to the invention, when the cap body is fixed to the rear part of the sharp pencil body during use, the lead gripping means is moved forward and backward once to automatically feed out the lead. and can be written on immediately.

In addition, in the present invention, the barrel and the tip are integrally formed, various known structures are adopted as a lead gripping means, the knock cap is removed, or a plug material, an eraser, etc. is used in place of the knock cap. However, this does not change the gist of the present invention in any way.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view, and FIGS. 2 and 3 are operation explanatory views. DESCRIPTION OF SYMBOLS 1... Shaft tube, 3... Core storage tube, 4... Elastic member, 3... Lead gripping means, 6... Core entraining member, 11
...Through hole, 12... Locking part, 13... Diameter reduction locking part, 14... Outward protrusion, 15... Pressing body, 16
...Repellent member.

Claims (1)

[Scope of utility model registration request] A core holding tube is provided with a barrel having a diameter-reduced portion at the rear, and a lead storage barrel in which a lock cap is fitted at the rear thereof, and which is biased rearward by an elastic member. a sharp pencil main body comprising a lead-carrying member disposed within the tip of the barrel; a cap barrel having a through hole at the rear; a locking portion provided on the inner surface of the cap barrel; a pressing body that has a diameter-reducing locking portion that can be contracted inward and has an outward protrusion that engages with the locking portion, is biased forward by an elastic member, and is disposed within the cap barrel; When the cap body is fixed to the rear part of the sharp pencil body, the diameter-reducing locking part slides the outer peripheral surface of the outward protrusion into contact with the diameter-reducing part of the shaft cylinder and is closed. Until the engagement between the outwardly protruding part and the locking part is released, the lock cap is pressed forward by the pressing body to advance the lead gripping means and the lead can be drawn out, and after the engagement is released, , the pressing body is pressed backward by a knock cap that retreats due to the elastic force of the resilient member that urges the lead gripping means backward against the elastic force of the resilient member that urges the pressing body forward; A cap-type sharpening pencil that protrudes from the rear end of the cap barrel.