JPH0556280B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention allows the lowering hammer to act on the lead feeding mechanism by lightly swinging the main body, and the lead feeding mechanism is operated to feed out the lead from the tip. Regarding the sharpening pencil that can be used.

[Conventional technology]

This kind of conventional sharpening pencil will be explained with reference to FIG. 3. By lightly swinging the main body 1, the lowering hammer 13 is connected to the flange of the tank joint 6 provided at the front end of the lead tank 5 of the lead feeding mechanism A. It is caused to reciprocate in the axial direction between a stopper 23 provided on the inner surface of the main body 1 to act on the core feeding mechanism A, and is locked to the front end of the chuck ring receiving sleeve 11 fixed to the inner periphery of the tip 1a side of the main body 1. The chuck 15 is opened and closed by moving the shaft portion 10a of the chuck 15 against the chuck ring 16 into which the chuck 15 is fitted, against or by the spring force of the chuck tightening spring 17. The core 19 can be fed out from the tip pipe 2 by feeding out a predetermined length at a time.

[Problem that the invention seeks to solve]

However, in the case of the above-mentioned conventional sharp pencil, the tank joint 6 of the lead tank 5 and the chuck 1
Since the shaft portion 10a of No. 5 is connected (fixed),
If the wick tank 5 is rotated upside down, the chuck shaft 10a, the chuck 15, the chuck ring 16, etc. may be twisted, resulting in deformation or breakage of these parts or breakage of the wick 19. When the chuck 15 is stretched, the chuck 15 is strongly pulled through the tank joint 6 of the core tank 5 and the chuck shaft portion 10a, and the core 19 is pulled tightly against the chuck 15.
There was a problem that there was a risk of it breaking (biting off) due to tightening.

In addition, a hammer 13 is attached to the core feeding mechanism A.
In order to extend the lead by acting against the chuck tightening spring 17, a weak spring force is used as the chuck tightening spring 17, so that when the chuck 15 returns due to the spring force of the chuck tightening spring 17. , the chuck 15 is not fully returned into the chuck ring 16 and is not tightened, and the core 1 due to the tightening of the chuck 15
There was a problem in that the pressing force on the tip 9 was insufficient, and not only could the lead 19 not be reliably fed out, but the lead would slip during writing, making it difficult to write.

[Means for solving problems]

In order to solve the above-mentioned problems, the sharpening pencil of the present invention operates by swinging the main body 1 as shown in the first figure, causing the lowering hammer 13 to act on the lead feeding mechanism A, and operating the lead feeding mechanism A. In a sharp pencil whose lead 19 can be drawn out from the tip of the tip 1a of the main body 1,
The lead feeding mechanism A includes a lead tank 5 having a tank joint 6 on the front part, and a stopper 22 at the rear of the lead tank 5 that is locked to a stopper 23 on the main body 1 side.
and the wick guide 1 following the tank joint 6 of the wick tank 5.
0 and a chuck joint 14 following this core guide 10.
, a spring receiving part 14a provided on the chuck joint 14, a knocking hammer 13 inserted between the core guide 10 and the main body 1 between the spring receiving part 14a and the tank joint 6, and the chuck joint. a chuck 15 connected to the chuck 14; a chuck ring 16 fitted between the chuck 15 and the ring inner circumference of the main body 1;
A chuck ring receiving sleeve 11 that locks the rear end of the chuck ring 16; a chuck tightening spring 17 inserted between the chuck ring receiving sleeve 11 and the spring receiving portion 14a; When the lowering hammer 13 moves backward, the spring receiving part 1
4a and pushes the spring receiving part 14a backward, and both ends or one end of the core guide 10 are separated and independent from the tank joint 6 and the chuck joint 14 or one joint. composition.

[Effect]

When the main body 1 is shaken up and down, the lowering hammer 13 reciprocates. When the lowering hammer 13 pushes the spring receiving part 14a, it knocks the chuck joint 14, opens the chuck 15 fitted in the chuck ring 16 against the spring force of the chuck tightening spring 17, and the lowering hammer 13 also When moving backward, the protrusion 24 provided at the front of the hammer 13 hits the spring receiver 14a and presses the spring receiver 14a, the chuck joint 14 and the core guide 10 backward, and the chuck 15 The chuck 15 is returned by the spring force of the chuck tightening spring 17 and the pressing force of the protrusion 24 at the front of the knockdown hammer 13, and the chuck 15 is closed. By repeating this process, the lead 19 is drawn out from the chuck 15 by a predetermined length and released from the tip. The core 19 can be fed out.

When the chuck 15 is returned, the lead guide 10 and the lead tank 5 are also pushed back, but the stopper 22 hits the stopper 23, so the lead tank 5
And there is no fear that the lead guide 10 or the lead tank 5 will slip out.

In addition, the chuck 15 is forcibly returned not only by the spring force of the chuck tightening spring 17 but also by the pressing force of the protrusion 24 at the front of the knockdown hammer 13, so that the chuck 15 is sufficiently returned into the chuck ring 16 and tightened. , the pressing force on the lead 19 due to the tightening of the chuck 15 increases, and not only can the lead 19 be reliably fed out, but also the lead does not slip during writing, making it easier to write.

Both ends or one end of the wick guide 10 are separate and independent from the tank joint 6 and chuck joint 14 or one of the joints 6 or 14, so even if the wick tank 5 is turned upside down, the wick tank 5 or Only the core tank 5 and the core guide 10 rotate, and the rotation of the core tank 5 is not transmitted to the chuck joints 14, chucks 15, and chuck rings 16, which are separate and independent. 16 etc. may be twisted and cause deformation, breakage, or breakage of the lead 19, and even if the lead tank 5 is stretched upside down, the chuck 15 will not be pulled backwards, so the lead 19 There is no risk of it being broken (choked off) by tightening the chuck 15.

When retracting the core 19, push in the core tank 5 and tank joint 6, move the core guide 10, chuck joint 14, spring receiver 14a, and chuck 15 forward against the spring force of the chuck tightening spring 17, It can be retracted by holding the chuck 15 in an open state and pressing the tip of the lead 19.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view showing an embodiment of the mechanical pencil of the present invention before the lead is held in the chuck, and FIG. 2 is a cross-sectional view of the main parts of the same after centering.

In FIG. 1, reference numeral 1 denotes a main body, which is formed by screwing a tip portion 1a, a middle portion 1b, and a rear end portion 1c in this order.
2 is a tip pipe provided at the tip portion 1a. The rear end of the tip pipe 2 is provided with a guide portion for guiding the core 19 into the tip pipe 2. A is a core feeding mechanism inserted into the main body 1, which feeds the core 1 from the tip pipe 2.
This is for rolling out a 9.

This core feeding mechanism A has a tank joint 6 at the front.
A core tank 5, a core guide 10, a lowering hammer 13, a chuck joint 14, and a spring receiving part 14.
a, a chuck 15, a chuck ring 16, a chuck ring receiving sleeve 11, a chuck tightening spring 17, a protrusion 24 at the front of the lowering hammer 13, etc.

Tank joint 6 provided at the front of the core tank 5
may be separately attached to the core tank 5. Reference numeral 22 denotes a stopper on the core tank 5 side, which in this embodiment is provided at the front of the tank joint 6. 23 is a stopper on the main body 1 side,
It is provided on the inner surface of the rear end portion 1c of the main body 1 and locks the core tank side stopper 22.
25 is a return spring inserted between the inner stage of the rear end 1c of the main body 1 and the outer stage of the core tank 5, and is not necessary. is preferably provided.

An eraser holder 20 holding an eraser 4 is provided at the rear end of the lead tank 5, and an eraser cover 21 is removably attached to the outer periphery of the rear end of the eraser 4, the eraser holder 20, or the lead tank 5. . The eraser holder 20 may be attached separately from the lead tank 5.

Into a somewhat large hole at the center of the front end of the tank joint 6 of the core tank 5 is fitted the rear end of a core guide 10 which is brought into contact with the inner end of the hole. This core guide 1
The cylindrical base of the spring receiving part 14a is connected to the chuck joint 14 which is in contact with the front end of the core guide 10 so that the front end of the core guide 10 is inserted therein. The chuck joint 14 and the spring receiving portion 14a may be formed integrally. 13 is an intermediate portion 1b between the core guide 10 and the main body 1 between the spring receiving portion 14a and the tank joint 6.
It is a downward hammer inserted between the The chuck joint 14 is provided integrally with the rear end of the chuck 15, or is attached separately.

A chuck ring 16 is fitted between the chuck 15 and the inner periphery of the main body 1 for a ring, and the rear end of the chuck ring 16 is fixed to the front part of the chuck ring receiving sleeve 11 provided at the intermediate portion 1b of the main body 1. Ru. The chuck ring receiving sleeve 11 may be separately fixed to the inner surface of the main body 1. The chuck tightening spring 17 is inserted between the chuck ring receiving sleeve 11 and the spring receiving portion 14a, and is fitted into the cylindrical portion of the spring receiving portion 14a. A protrusion 24 is screwed onto the front part of the lowering hammer 13 and pushes the spring receiving part 14a rearward by hitting the spring receiving part 14a when the lowering hammer 13 moves rearward. Of course, it is designed not to interfere with the chuck tightening spring 17. The downward hammer 13 and the protrusion 24 may be formed integrally.

In the above structure, the wick 19 of the wick tank 5 reaches near the tank joint 6, the wick guide 10, the chuck joint 14, and the chuck 15 (see FIG. 1).
When the main body 1 is shaken up and down, the knockdown hammer 13 reciprocates between the tank joint 6 and the spring receiving part 14a. This lowering hammer 13 is the spring receiving part 14a.
When pressed, the protrusion 2 on the front of the knockdown hammer 13
4 hits the inner stage of the chuck ring receiving sleeve 11 or the intermediate portion 1b of the main body 1 (see FIG. 2),
Knock the chuck joint 14 and attach the chuck ring 1.
When the chuck 15 fitted in the chuck 6 is opened against the spring force of the chuck tightening spring 17, and the lowering hammer 13 moves backward, the protrusion 24 provided at the front of the lowering hammer 13 is moved to the spring holder. The spring receiving portion 14a, the chuck joint 14, and the core guide 10 are pressed rearward by contacting the chuck 15 with the chuck tightening spring 1.
7 spring force and the protrusion 2 on the front of the knockdown hammer 13
4 to close the chuck 15, and repeat this process to close the chuck 15.
The lead 19 can be drawn out by a predetermined length at a time, and the lead 19 can be drawn out from the tip.

When the chuck 15 is returned, the lead guide 10 and the lead tank 5 are also pushed back, but the stopper 22 hits the stopper 23, so the lead tank 5
And there is no fear that the lead guide 10 or the lead tank 5 will slip out. Note that when the return spring 25 is provided, the core tank 5 is always returned by the spring force of the return spring 25.

In addition, the chuck 15 is forcibly returned not only by the spring force of the chuck tightening spring 17 but also by the pressing force of the protrusion 24 at the front of the knockdown hammer 13, so that the chuck 15 is sufficiently returned into the chuck ring 16 and tightened. The pressing force on the lead 19 due to the tightening of the chuck 15 is increased, and not only can the lead 19 be reliably fed out, but the lead does not slip during writing, making it easier to write.

Since both ends of the wick guide 10 are separate and independent from the tank joint 6 and the chuck joint 14, even if the wick tank 5 is rotated upside down, the wick tank 5 only rotates, and the rotation of the wick tank 5 is separated. Since the transmission is not transmitted to the chuck joints 14, chucks 15, and chuck rings 16, which are independent, the chuck joints 14, chucks 15, and chuck rings 16
There is no risk of deformation, breakage, or breakage of the wick 19 due to twisting of the wick 19, and the chuck 15 will not be pulled backwards even if the wick tank 5 is pulled upside down. There is no risk of breakage (biting) due to tightening of the chuck 15.

The lead 19 can also be fed out by clicking the eraser cover 21. That is, when the eraser cover 21 is knocked, the lead tank 5, tank joint 6, lead guide 10, chuck joint 14, spring receiver 14a and chuck 15 resist the spring force of the chuck tightening spring 17 or the spring 17 and return spring 25. The chuck 15 can be opened and closed by moving in the axial direction or by its spring force, and the core 19 can be drawn out from the tip pipe 2. Core 1
9, push in the eraser cover 21 and remove the lead tank 5, tank joint 6, lead guide 10,
The chuck joint 14, the spring receiver 14a, and the chuck 15 are moved forward against the spring force of the chuck tightening spring 17 or the return spring 25, and the chuck 15 is held in an open state, and the tip of the core 19 is moved forward. It can be retracted by pressing.

In the present invention, even if only the rear end of the core guide 10 and the tank joint 6 or the front end of the core guide 10 and the chuck joint 14 are separated and independent, the same effect as described above can be achieved. is clear. Furthermore, when erasing characters, the reaction force received from the paper surface acts on the lead tank 5 through the eraser 4 and tries to move the lead feeding mechanism A forward, but the inner stage of the rear end 1c of the main body 1 When a return spring 25 is inserted between the lead tank 5 and the outer stage, the spring force of the return spring 25 counteracts the reaction force acting on the eraser 4 when erasing characters, and the lead tank 5 of the lead feeding mechanism A is Since the eraser 4 is prevented from moving, there is no risk that the eraser 4 will settle, and erasing can be performed reliably.

Furthermore, instead of fixing the tip pipe 2 to the tip of the tip portion 1a of the main body 1 in a state protruding from this point,
As shown in the first figure, a slider 3 with a tip pipe, which is locked with the tip pipe 2 protruding from the tip, is slidably inserted into the tip portion 1a of the main body 1, and the rear end of the slider 3 with the tip pipe and A cylindrical adjustment hammer 18 may be inserted between the front end of the chuck 15 and the inner surface of the tip portion 1a of the main body 1.

In this case, when the main body 1 is shaken up and down, the adjustment hammer 18 and the lowering hammer 13 reciprocate. The reciprocating operation of the knockdown hammer 13 is as described above. The adjustment hammer 18 alternately and lightly presses the slider 3 and the chuck 15 by reciprocating motion, and when the slider 3 is pressed, the tip pipe 2 is adjusted to the tip portion 1.
Forcibly push it out from the tip of a. Further, when the chuck 15 is pressed, the chuck 15 is returned to the chuck ring 16 and closed by the pressing force of the adjustment hammer 18, so that the core 19 can be held even more reliably by closing the chuck 15. I can do it.

〔Effect of the invention〕

As described above, according to the present invention, both ends or one end of the wick guide 10 are separated and independent from the tank joint 6 and the chuck joint 14 or one of the joints 6 or 14, so that the wick tank 5 can be transferred easily. Even when rotating, only the core tank 5 and tank joint 6 or the core tank 5, tank joint 6, and core guide 10 rotate, and the chuck joint 14, chuck 15, and chuck ring 16 allow the rotation of the core tank 5 to be separated and independent. Since the transmission is not transmitted to the chuck joint 14, chuck 15 and chuck ring 1,
Not only is there no risk of deformation, breakage, or breakage of the lead 19 due to twisting of the lead tank 5, but also the chuck 15 will not be pulled backwards even if the lead tank 5 is held and pulled. There is no risk that the core 19 will be broken (eaten) by tightening the chuck 15.

In addition, the chuck 15 is forcibly returned not only by the spring force of the chuck tightening spring 17 but also by the pressing force of the protrusion 24 at the front of the knockdown hammer 13, so that the chuck 15 is sufficiently returned into the chuck ring 16 and tightened. The pressing force on the lead 19 due to the tightening of the chuck 15 is increased, and not only can the lead 19 be reliably fed out, but the lead does not slip during writing, making it easier to write.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the present invention's sharpening pencil before the lead is held in the chuck, Fig. 2 is a sectional view of the main parts showing the state after centering, and Fig. 3 is a conventional sharpening pencil. It is a sectional view showing an example. 1... Main body, 1a... Tip, 1b... Middle part, 1c... Rear end, 2... Tip pipe, 3... Slider with tip pipe, 4... Eraser, 5... Lead tank, 6 ... Tank joint, 10 ... Core guide,
11... Chuck ring receiving sleeve, 13...
Driving hammer, 14...chuck joint, 14a
...Spring receiving part, 15...Chuck, 16...Chuck ring, 17...Chuck tightening spring, 18...Adjusting hammer, 19...Core, 23...
... Stopper on the main body side, 22 ... Stopper on the wick tank side, 24 ... Projection, 25 ... Return spring.

Claims (1)

[Claims] 1 By swinging the main body 1, the lowering hammer 13 acts on the lead sending mechanism A, and the leading end part 1a of the main body 1 is operated.
In the sharp pencil, the lead 19 can be fed out from the tip of the lead tank 5. The lead feeding mechanism A includes a lead tank 5 having a tank joint 6 at the front, and stoppers of five lead tanks that are locked to a stopper 23 on the main body 1 side. 22, a core guide 10 that follows the tank joint 6 of the core tank 5, a chuck joint 14 that follows this core guide 10, a spring receiving portion 14a provided on this chuck joint 14, and this spring receiving portion 14a.
and the tank joint 6, a knocking hammer 13 inserted between the core guide 10 and the main body 1, a chuck 15 connected to the chuck joint 14, and a ring inner part of the chuck 15 and the main body 1. a chuck ring 16 fitted between the chuck ring 16 and the periphery; a chuck ring receiving sleeve 11 provided on the inner periphery of the main body 1 and locking the rear end of the chuck ring 16; and the chuck ring receiving sleeve 11 and the spring receiving part 1.
4a, and the chuck tightening spring 17, which is provided at the front of the lowering hammer 13, and when the lowering hammer 13 moves rearward, it hits the spring receiving part 14a, and the spring receiving part 14
A sharp pencil consisting of a protrusion 24 that pushes the tip rearward, and in which both ends or one end of the lead guide 10 are separate and independent from the tank joint 6 and the chuck joint 14 or one joint.