JPS5979800A - Propelling pencil with lead returning mechanism - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a mechanical pencil that feeds out the lead using a lead slide method. As the core is handled, the chuck is expanded and the core is returned to the core storage section by its own weight.

In a normal mechanical pencil with a core detent member,
After use, the core is held by a core detent member, and
It is held in place by a pick. Even when set in the amplified state, it is firmly held by the core detent member.

Therefore, it cannot be returned to the core storage section. However, if you can return the lead to the lead storage part, I'f+i' from outside!
The fear of lead breakage can be greatly reduced, and it is also possible to develop new mechanical pencils with a revolver-type lead storage structure.

In view of the above-mentioned circumstances, the rffi1 of the present invention has been devised for a mechanical pencil that feeds out the lead using a conventionally known side slide method, and after use, the mechanical pencil can be easily retracted from T, L 1%%.
In order to achieve the first objective, the structure of the present invention is to allow the lead to be returned to the lead storage part. Operation horn 1
) (: Mechanical pencil l that made it possible to feed out the lead against the resistance of the lead detent member when advancing): 83 + Retraction length sufficient for pulling out (f'/Wj F
There is no contact between the cylindrical partition member fixed inside the shaft cylinder,
The fastener receiver of the chuck set (111, 111, 1!
The device is designed to be capable of retracting with sufficient retractability, and the retraction of the tilting body and the fastener receiver described in -1- is performed by zero retraction operation of the operation knob.

The present invention will be described below with reference to embodiments shown in the drawings.

In FIG.
] The metal 4 is provided with a core detent member 10 such as an O-ring and a core protection tube 11. A cylindrical partition member 6 with the same name is placed on the inner wall surface approximately in the middle of the shaft cylinder 1 to divide it into a front operation part 8 and a rear core storage part 9, and both parts 8 and 9 are connected to each other.
It is inserted into the lead storage part 9 and inserted into the rear end of the single-shaft handle 1, so that the lead can be replenished from the part 5.

In order to feed out the core using the knob portion 2a of the operation knob 2 that is exposed outside the shaft tube 1, the handle 211G is inserted into the elongated hole 3 drilled in the L shaft tube 1, and the annular portion at the 2C
This enables the push body 22, which will be described later, to move forward.

The operating portion 8 of the barrel 1 has a long and narrow hole 18 that is slidably inserted into the inner surface of the barrel 1 and into which the handle 21 of the operating knob 2 is inserted.
An annular ring is slidably fitted between the fastener receiver 14, the protrusion 19.13 provided on the inner surface of the tip end of the fastener receiver 14, and the inner protrusion 20 opposite thereto. Tightening ring 21
．． The head of the 3-split head is inserted through the tightening ring 21, and a stepped body 23 is formed behind it, so that the refills in the lead storage section 9 can be fed into the head one by one. None lko II・Tsuku type 22. Inner protrusion 20 of iJ3 and tightening shell number 14
A known f-i-tuck consisting of a chuck spring 271 and lpt is stretched between the first end face of the stepped body 23 and the inner front end face of the stepped body 23, and always keeps the chuck body 22 at the rear. 1 trick 1 is installed. For example, the front end surface 15 of the fastener receiver 1/1 is brought into contact with a stepped portion 12 formed on the inner surface of the cap 4. Alternatively, the stepped portion 1G formed on the outer surface of the fastener receiver 14 is brought into contact with the rear end surface 13 of the metal 4.
1 to the steady position shown in FIG.

By avoiding engagement of the annular portion 2C of the operating knob 2 with the stepped body 23 of the tab body 22, when pushing the operating knob 2 forward with your fingertips, the tab body 22, the tightening ring 21, and the core are held together. In this way, the resistance of the centering member 10 is set to JJI L/'i (centering of a certain length is possible.

After the tightening ring 21 collides with the tightening tool and the 1/l protrusion 19, the chuck spring 24 is compressed and the chuck body 2
2/ζI() is further t,,=-Mi口1(shi,chiliao・tsukukyu 22 head enlargement Ufl, ter, I also open fik is performed, at this stage, finger operation knob 2 When released, it opens with the return force of the chuck spring 24]
will return to its original steady position "f'l". In the process of returning, the tightening ring 21 will be moved back to the point where it hits the inner protrusion 20, and the tilting body 22 will contract again so as to hold ;is. diameter.

The above is no different from the lead feeding operation using the normal side slide method.

The present invention differs from the conventional one-sided slide type mechanical pencil structure in the following points. Tit-tsuku rest 22 occurs when the chuck body 22 occupies a normal position.
The distance M of the cylindrical part tip surface 71) + t, ':> of the cylindrical partition member 6 is sufficient to handle the core from the core detent part 010.
The engaging stepped portion 25 is formed at a position corresponding to the armpit direction. The tilting body 22 is able to move back until the engaging stepped portion 25 collides with the distal end surface 7 of the cylindrical portion, but once it collides with it, it cannot move back any further.

The annular portion 2C of the operating knob 2 has no control at the rear with respect to the outer peripheral surface of the stepped body 23 of the titter body 22.

It slides smoothly so that it can be slid easily.
＋< , j Boo 1-Even after the engagement step 2 of the vine body is removed from the cylindrical part 1, the handle of the operating knob 2 remains unchanged.
! 2 b Push the TJ゛shime shell holder () 1/l backward μ
ru J, sea urchin i-) (there,.

IIql+ f::l The distance 1i!+1 between the rear end surface of the hole 3 drilled in 8Q 1 and the rear end surface of the hole 31 and the handle 2b of the knob 2 is I -j':l+
Length M, cylindrical partition + Δ6 14 Q C/,:
'r Make the head of the tottsuk 22 amplified (, - Sufficient retraction length of the closing shell holder 14) In what way'='r shi<
13, thus after operation 12) H operation-(, the first step is 1-rest is length M/,
21) After) Q l, 1 at the second stage, unfastened tool receiver 1 no 1
The length of 4 is 1 ().

This J, sea urchin f-1! 4 Tsukuset white 1 can be retreated
1° 11 The lifting platform of the present invention, normal writing L1 culm degree C (, L, as a means 17 for preventing easy retreat,
Example C in Figure 1 uses a spring with a known spring strength that does not easily bend under the pressure of writing, and repels the end face of the fastener holder (J1/I).However, it resists this spring. It is expected that a fairly strong force will be required to move the operation knob 2 backward.If this point can be solved, then instead of a spring, a hoisting type of engagement can be used. Just change it to the side.

In the example shown in FIG. 4, C3 has two vertical notches 26.26 on the rear edge of the tightening shell holder 14 to make it easy to bend in the radial direction. This hook part 28 is in the stationary position C5 and IT'Ill cylinder 1
Established in! It is locked with the ζ locking hole 29. This can sufficiently withstand writing pressure in the locked state, and by releasing the locked state with the tip of your finger, you can easily move the operating knob 2 backward.

It is also possible to engage and disengage JuJ by expansion and contraction in the circumferential direction instead of radial deflection, and FIG. 5 shows an example C in this case. That is, the fastener receiver 14 is formed with two ladder-shaped protrusions 30, 30 whose diameter can be reduced in the circumferential direction. It has grooves 11 of different sizes! It engages and locks with the shoulder portion 31 of f11 so that it can receive writing pressure. On the other hand, these protrusions 30, 30 are formed on the handle 21) of the operating knob 2).
j/1 shape or +fi shape groove surface 32 engages, and the full surface J
32 (when pressed, it contracts in the circumferential direction and its engagement is released).
Until I say b 4f.

As described in Figure 1, the operation knob 2 in Figure 1 is as shown in Figure 1.
If you operate the knob part 2a with your fingertips from the state where it is in the steady position IP, then press the button 1-i13J.
: (J' the core is kept together after) and the length ν
I1. As shown in Figure 2, in the case of 1CJ Godogo, the core is back to the core ■-
It can be completely pulled out from the retaining member 10. -c. The stepped portion 25 of the zigzag rest 22 corresponds to the front end 7 of the f:) portion of the cylindrical partition member 0. Even after that, if the operation knob 2 is moved back by the length [-(]), the tightening C1 catch 1/I will move back as shown in Fig. 3, and the head of the chuck body 22 will expand in this way, so that the center can return to the core storage section 9 under its own weight.

The present invention has the following features: 1- It is clear from the above that the lead feeding function of the conventional glue slide type sitobu pencil is fully utilized, and the hole structure for returning the lead is made relatively easy. After finishing writing, the user can remove the lead by pulling the operating knob forward with his or her index finger and pointing the tip upward, despite the intervention of the lead detent member. can be returned to the core storage section.

In this way, the risk of core breakage due to external impact can be reduced, and the lead storage section of the revolver
The foundation for the opening of a new type of mechanical pencil has been laid, and the industrial value of (1t11) is extremely high.

[Brief explanation of the drawing]

, Fig. 1 to Fig. 3 are cross-sectional views of a mechanical pencil with a core resetting mechanism according to the present invention, and are shown in the order of operation, and Fig. 4 and Fig. Each school shows a different example of how to prevent it from going backwards! i. DESCRIPTION OF SYMBOLS 1... Shaft cylinder, 2... Operation knob, 6... Cylindrical partition member, 10... Core detent member, 14... Fastener receiver, 22... Chuck body.

Claims (1)

[Claims] 1. The shaft cylinder (1) with the Gro-Tsuku uyl- inside is moved forward with the operating knob (2) that can be exposed to the outside to return the core to the 11th member (
In a mechanical pencil that allows the lead to be drawn out against resistance 1 (+), the tip body (22) of the date cutlet 1- is used to pull out the lead from the lead return member 11' (10). Sufficient retraction length hr + position C cylindrical partition fixed inside the shaft cylinder (1) +, i <6') can be contacted, and the fastener holder tJ (14) of the tilt hit 1- is set according to the above JA. )-shaped partition +4 < (3) and the chuck body (22) engaged with the chuck body (22)
Enlarge the head of the head ('51!) It is possible to retract the retraction length 1- enough to make it. The re-core machine 4 (4) is characterized by being operated by retracting the knob (2).
I.1 mechanical pencil.