JPH0566280B2 - - 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 type of conventional sharp pencil is explained with reference to FIG. 3. By lightly swinging the main body 1, the hammer 13 is moved into the lead tank 5 of the lead feeding mechanism A consisting of the lead tank side part a and the chuck side part b. The flange of the tank joint 6 provided at the front end and the stopper 23 provided on the inner surface of the main body 1 are moved back and forth in the axial direction to act on the core feeding mechanism A, and the inner periphery of the main body 1 on the tip 1a side is caused to move back and forth in the axial direction. A chuck ring 1 that is locked to the front end of a fixed chuck ring receiving sleeve 11 and has a chuck 15 fitted therein.
6, the chuck shaft portion 10 is moved against or by the spring force of the chuck tightening spring 17 to open and close the chuck 15, and the lead 19 is fed out from the chuck 15 by a predetermined length and then removed from the tip of the pipe 2. The core 19 can be fed out.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional sharp pencil, since the lead tank side part a is connected (fixed) to the chuck shaft part 10 of the chuck side part b, when the lead tank 5 is rotated upside down, the chuck shaft part 10, Chuck 15 and Chuck ring 16
There is a risk that the wick tank 5 may be twisted, leading to deformation, breakage, or breakage of the wick 19.
When the chuck 15 is strongly pulled, the chuck 15 is strongly pulled through the tank joint 6 of the wick tank 5 and the chuck shaft 10, and the wick 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.
Since the chuck tightening spring 17 is applied against the chuck tightening spring 17 to feed out the lead, a weak spring force is used as the chuck tightening spring 17, so that the chuck side portion b is moved by the spring force of the chuck tightening spring 17. When returning, the chuck 15 is not fully returned into the chuck ring 16 and tightened, and the pressing force against the lead 19 due to the tightening of the chuck 15 is insufficient, which not only makes it impossible to reliably feed out the lead 19, but also prevents the lead from tightening when writing. There was a problem that it would slip and become difficult to write on.

[Means for solving problems]

In order to solve the above-mentioned problems, the first invention uses a lead feeding mechanism A, which is composed of a lead tank side part a and a chuck side part b, to lower the hammer 13 by swinging the main body 1 as shown in the first figure. The chuck shaft portion 10 of the chuck side portion b is engaged with the front end of the chuck ring receiving sleeve 11 fixed to the inner periphery of the tip portion 1a of the main body 1.
The chuck tightening spring 17 tightens the chuck shaft portion 10 against the chuck ring 16 into which the chuck 5 is fitted.
In a sharp pencil that can open and close the chuck 15 by moving against or by the spring force of the main body 1, the lead 19 can be pulled out from the tip of the tip part 1a of the main body 1. The chuck side part b is divided into two parts, and the end of the chuck shaft part 10 of the chuck side part b is inserted into the front part of the core tank side part a, and a hammer 13 is inserted into the rear part of the chuck shaft part 10. A contact portion 25 is provided.

In the second invention, by swinging the main body 1 as shown in the second figure, the hammer 13 is lowered to the chuck shaft portion 10 of the chuck side portion b of the lead feeding mechanism A consisting of the lead tank side portion a and the chuck side portion b. The spring force of the chuck tightening spring 17 causes the chuck shaft portion 10 to be applied to the chuck ring 16 which is locked to the front end of the chuck ring receiving sleeve 11 fixed to the inner periphery of the tip portion 1a of the main body 1 and into which the chuck 15 is fitted. The chuck 15 is opened and closed by resisting or moving it by its spring force, and the main body 1
In a sharp pencil that can feed out the lead 19 from the tip of the tip 1a, the lead feeding mechanism A is installed in two parts, one on the lead tank side part a and the other on the chuck side part b.
The lead tank side part a includes a lead tank 5 to which an eraser 4 is removably fitted to the rear end, and a tank joint 6 provided at the front end of the lead tank 5.
and a cylindrical knock joint 8 connected to the front part of this tank joint 6, and a chuck shaft part 10 of the chuck side part b is attached to the front part of the knock joint 8 which constitutes the core tank side part a. The ends are fitted and inserted, and the contact part 25 of the knockdown hammer 13 is provided at the rear part of the chuck shaft part 10, and the outer periphery of the tank joint 6 side of the core tank 5 is movably fitted and provided on the inner surface of the main body 1. The stopper 23 at the front of the stopper sleeve 7 is attached to the stopper 22 at the front of the knock joint 8.
A knock spring 9 is inserted between the stopper 23 at the front of the stopper sleeve and the front end of the tank joint 6, with the rear ends brought into contact with each other.

[Effect]

In the first invention shown in the first figure, when the main body 1 is shaken up and down, the hammer 13 reciprocates. This lowering hammer 13 is the collar portion 2 of the chuck shaft portion 10.
When 4 is pressed, the chuck side part b is knocked, the chuck 15 fitted in the chuck ring 16 is opened against the spring force of the chuck tightening spring 17, and the lowering hammer 13 is pressed against the chuck shaft 10.
When the abutment part 25 of
5 is closed, the lead 19 is let out by a predetermined length from the chuck 15, and the lead 19 can be let out from the tip.

When the chuck side part b is returned, the core tank side part a is also pushed backward, but since the stopper 22 hits the stopper 23, the core tank side part a
There is no risk of it slipping out.

In addition, the chuck side portion b is forcibly returned not only by the spring force of the chuck tightening spring 17 but also by the pressing force of the lowering hammer 13.
The chuck 15 is fully returned into the chuck ring 16 and tightened, and the tightening of the chuck 15 increases the pressing force on the lead 19, which not only ensures reliable feeding of the lead 19 but also prevents the lead from slipping during writing. It becomes easier to write.

Since the front part of the wick tank side part a is separate and independent from the chuck shaft part 10 of the chuck side part b, even if the wick tank 5 is turned upside down, the wick tank side part a only rotates and the wick is A chuck shaft portion 10 and a chuck 1 in which the rotation of the tank side portion a is separated and independent.
5 and chuck ring 16, the chuck shaft portion 10, chuck 15, chuck ring 16, etc. are twisted and deformed.
There is no risk of breakage or breakage of the lead 19, and the chuck 15 will not be pulled backwards even if the lead tank 5 is stretched upside down. There is no fear.

When retracting the wick 19, push in the wick tank side part a, move the chuck shaft 10 and the chuck 15 forward against the spring force of the chuck tightening spring 17, hold the chuck 15 open, and retract the wick. It can be retracted by pressing the tip of the core No. 19.

In the second invention shown in the second figure, when the main body 1 is shaken up and down,
The lowering hammer 13 reciprocates. Thereafter, similarly to the first invention, the reciprocating movement of the hammer 13 knocks the chuck side part b to feed out the lead 19, and returns the chuck side part b to draw out the lead 19.
You can pull in 9. In addition, for the same reason, the lead 19 is reliably fed out, preventing the lead from slipping during writing, and making it easier to write.
There is no risk of deformation or breakage of the chuck shaft portion 10, chuck 15, chuck ring 16, etc. or breakage of the core 19, and the chuck 15 is pulled backwards and the core 19 is broken (eaten) by tightening the chuck 15. There's no fear.

When erasing characters, the reaction force received from the surface of the paper acts on the lead tank 5 through the eraser 4 and tries to move the lead feeding mechanism A forward, but the front part of the stopper sleeve 7 provided on the inner surface of the main body 1 stopper 2
3 and the front end of the tank joint 6, the spring force of this spring 9 counteracts the reaction force acting on the eraser 4 when erasing characters, and the lead tank 5 of the lead feeding mechanism A is inserted. Since the eraser 4 is prevented from moving, there is no fear that the eraser 4 removably fitted into the lead tank 5 will settle, and erasing can be performed reliably.

〔Example〕

First, a first embodiment of the sharpening pencil of the present invention will be explained with reference to FIG.

In Fig. 1, 1 is the main body, 1a is the tip thereof,
2 is a tip pipe provided at the tip portion 1a. A
1 is a lead feeding mechanism inserted into the main body 1, and is used to feed out the lead 19 from the tip pipe 2.

This lead feeding mechanism A includes a lead tank side portion a,
Chuck side portion b on which the lowering hammer 13 acts
As a result, both parts a and b are divided into two parts. The chuck side part b is the chuck shaft part 1
0, a collar portion 24 and a contact portion 25 provided at the front and rear portions of the chuck shaft portion 10, respectively, and the chuck 15;
It consists of a chuck ring 16, a chuck ring receiving sleeve 11, a chuck tightening spring 17, etc.

The core tank side portion a includes a core tank 5 and a tank joint 6 fixed to the inner periphery of the front end of the core tank 5.
and a stopper 22 provided on the rear outer periphery of the core tank 5. Stopper 22 of core tank 5
is a stopper 23 provided on the rear inner circumference of the main body 1.
is in contact with.

An eraser holder 20 holding an eraser 4 is removably fitted to the inner periphery of the rear end of the lead tank 5, and an eraser cover 21 is removably fitted to the outer periphery of the rear end of the eraser 4 or the lead tank 5. ing.

A somewhat large hole is formed at the center of the front end of the tank joint 6 constituting the core tank side portion a, and the end of the chuck shaft 10 is fitted into this large diameter hole. A chuck ring 16 is fitted between the chuck 15 and the inner periphery of the ring at the tip 1a of the main body 1, and the rear end of the chuck ring 16 is locked to the front end of the chuck ring receiving sleeve 11. The chuck tightening spring 17 is fitted between the chuck ring receiving sleeve 11 and the chuck shaft 10, and is also fitted between the front end of the chuck ring receiving sleeve 11 and the collar 24 of the chuck shaft 10. The outer periphery of the front end of the chuck ring receiving sleeve 11 is fixed to the inner periphery of the main body 1 on the side of the tip 1a by screws.

Further, the lowering hammer 13 is connected to the chuck shaft portion 10.
It is fitted between a flange portion 24 and an abutment portion 25 provided on the outer periphery of the holder.

In the configuration of the first embodiment described above, the wick tank 5
The inner core 19 is the tank joint 6 and the chuck shaft part 10.
It passes through the area and reaches the vicinity of chuck 15. When the main body 1 is shaken up and down, the lowering hammer 13 reciprocates between the collar portion 24 of the chuck shaft portion 10 and the abutting portion 25.

The lowering hammer 13 alternately presses the collar portion 24 and the contact portion 25 of the chuck shaft portion 10 by reciprocating, and when the collar portion 24 is pressed, the chuck shaft portion 1
0 is directly pressed against the spring force of the chuck tightening spring 17, the chuck 15 is opened in front of the chuck ring 16, and when the abutment part 25 is pressed, the spring force of the chuck tightening spring 17 and the lowering hammer The chuck 15 is returned to the chuck ring 16 by the pressing force of the chuck 13 and closed, and this process is repeated to close the chuck 15.
The twisted core 19 is paid out a predetermined length at a time, and the end pipe 2 is
The core 19 can be drawn out.

When chuck 15 is returned, the core tank side part a
However, since the stopper 22 hits the stopper 23, there is no danger that the wick tank side portion a will slip out.

In addition, the chuck side portion b is forcibly returned not only by the spring force of the chuck tightening spring 17 but also by the pressing force of the lowering hammer 13.
The chuck 15 is fully returned into the chuck ring 16 and tightened, and the pressing force on the lead 19 due to the tightening of the chuck 15 increases, which not only allows the lead 19 to be reliably fed out, but also prevents the lead from slipping during writing. It becomes easier to do.

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, chuck shaft 10, and chuck 15 move in the axial direction against or by the spring force of the chuck tightening spring 17, and the chuck 1
5 can be opened and closed, and the core 19 can be drawn out from the tip pipe 2.

The front part of the wick tank side part a, that is, the front part of the tank joint 6, is separate and independent from the chuck shaft part 10 of the chuck side part b, so even if the wick tank 5 is turned upside down, the wick tank 5 and the front part are not connected to each other. Only the tank joint 6 rotates, and the rotation of the core tank 5 is not transmitted to the chuck shaft 10, chuck 15, chuck ring 16, which are separate and independent. There is no risk of the core 19 being twisted and deformed, broken, or broken.

Furthermore, even if the wick tank 5 is stretched upside down, the chuck 15 will not be pulled backwards, so there is no fear that the wick 19 will be broken (eaten) by tightening the chuck 15.

To retract the lead 19, push in the eraser cover 21, move the lead tank 5, tank joint 6, chuck shaft 10, and chuck 15 forward against the chuck tightening spring 17, and then close the chuck 15.
The core 19 can be retracted by holding it in an open state and pressing the tip of the core 19.

Next, a second embodiment will be explained with reference to FIG.

In the second embodiment, the core tank side portion a is connected to a core tank 5, a tank joint 6 fixed to the inner periphery of the front end of the core tank 5, and a front part of the tank joint 6, as shown in the second figure. A somewhat large hole is formed in the center of the front part of the knot joint 8 that constitutes the core tank side portion a, and the chuck shaft portion 10 is inserted into this large diameter hole. At the same time, a notch is inserted into the stopper 23 at the front of the stopper sleeve 7, which is fixed with a screw to the rear end of the chuck ring receiving sleeve 11, to which the outer periphery of the tank joint 6 side of the core tank 5 is movably fitted. The stopper 22 at the front of the joint 8 is brought into contact with the rear end of the stopper 22 at the front of the stopper sleeve 7.
A knock spring 9 is inserted between the front end of the tank joint 6 and the front end of the tank joint 6.

In the configuration of the second embodiment described above, when the main body 1 is shaken up and down, the lowering hammer 13 hits the chuck shaft portion 1.
0 reciprocating between the collar part 24 and the contact part 25,
The core 19 can be fed out in the same manner as in the first embodiment.

Furthermore, when the chuck 15 is returned by the spring force of the chuck tightening spring 7 and the pressing force of the lowering hammer 13, the chuck shaft portion 10 pushes the notch joint 8 of the core tank side portion a, but the notch joint 8
Since it is in contact with the stopper sleeve 7 and does not move, there is no risk that the core tank side portion a will slip out.

In addition, the chuck side portion b is forcibly returned not only by the spring force of the chuck tightening spring 17 but also by the pressing force of the lowering hammer 13.
The chuck 15 is fully returned into the chuck ring 16 and tightened, and the pressing force on the lead 19 due to the tightening of the chuck 15 increases, which not only allows the lead 19 to be reliably fed out, but also prevents the lead from slipping during writing. It becomes easier to do.

The lead 19 can also be fed out by clicking the eraser cover 21. In this case, when the eraser cover 21 is knocked, the lead tank 5, tank joint 6, chuck joint 8, chuck shaft 10, and chuck 15 move against the spring force of the chuck tightening spring 17 and the knock spring 9, or due to the spring force. The chuck 15 can be opened and closed by moving in the directions, and the lead 19 can be fed out from the tip pipe 2.

The front part of the wick tank side part a, that is, the front part of the knob joint 8, is separate and independent from the chuck shaft part 10 of the chuck side part b, so even if the wick tank 5 is rotated upside down, it will not connect to the wick joint 5. This is because the rotation of the core tank 5 is not transmitted to the chuck shaft portion 10, the chuck 15, and the chuck ring 16, which are separate and independent, only by the rotation of the tank joint 6 or the core tank 5, the tank joint 6, and the knob joint 8. , chuck shaft 10, chuck 15, and chuck ring 16
There is no risk that the core 19 may be twisted and deformed or broken, or the core 19 may be broken.

Furthermore, even if the wick tank 5 is stretched upside down, the chuck 15 will not be pulled backwards, so there is no fear that the wick 19 will be broken (eaten) by tightening the chuck 15.

When retracting the lead 19, push in the eraser cover 21 and tighten the lead tank 5, tank joint 6, knob joint 8, chuck shaft 10, and chuck 15 by tightening the chuck spring 17 and the knob spring 9.
The wick 19 can be retracted by moving it forward against the spring force, holding the chuck 15 open, and pressing the tip of the wick 19.

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 stopper 23 at the front of the stopper sleeve 7 and the tank joint 6 Since a knock spring 9 is inserted between the front end of the eraser and the front end of the eraser, the spring force of this spring 9 counteracts the reaction force acting on the eraser 4 when erasing characters and prevents the lead tank 5 of the lead feeding mechanism A from moving. Therefore, there is no fear that the eraser 4 removably fitted into the lead tank 5 will settle, and the eraser can be reliably erased.

In the present invention, a slit of a required length may be provided in the stopper sleeve 7, and a protrusion that fits into the slit may be provided in the tank joint 6 to prevent the core tank 5 from rotating. With this structure, the lead tank 5 does not rotate, so if a cap with a clip is removably attached to the eraser 4 side of the lead tank 5 and the sharp pencil is held in a pocket with the clip, the cap will not rotate. This makes it easier to hold.

〔Effect of the invention〕

As described above, according to the first invention, the front part of the core tank side part a is the chuck shaft part 1 of the chuck side part b.
0, so even if the core tank 5 is turned upside down, only the core tank side part a rotates, and the rotation of the core tank side part a is separated and independent from the chuck side part b. Since it is not transmitted to the chuck shaft portion 10, chuck 15, chuck ring 16, etc., there is no risk that the chuck shaft portion 10, chuck 15, chuck ring 16, etc. will be twisted, resulting in deformation or breakage of these parts or breakage of the core 19. In addition, the front part of the core tank side part a is the chuck shaft part 10.
Since the chuck 15 is separate and independent from the chuck 15, even if the wick tank side part a is pulled upward, the chuck 15 will not be pulled backwards.
There is no risk of it breaking (biting off) due to tightening.

In addition, the chuck side portion b is forcibly returned not only by the spring force of the chuck tightening spring 17 but also by the pressing force of the lowering hammer 13.
The chuck 15 is fully returned into the chuck ring 16 and tightened, and the pressing force on the lead 19 due to the tightening of the chuck 15 increases, which not only allows the lead 19 to be reliably fed out, but also prevents the lead from slipping during writing. It becomes easier to do.

According to the second invention, in addition to the effects of the first embodiment, when erasing characters, the reaction force received from the paper surface acts on the lead tank 5 via the eraser 4, causing the lead feeding mechanism A to move forward. However, since the knock spring 9 is inserted between the stopper 23 at the front of the stopper sleeve 7 provided on the inner surface of the main body 1 and the front end of the tank joint 6, the spring force of the spring 9 is Since the movement of the lead tank 5 of the lead feed mechanism A is prevented against the reaction force acting on the eraser 4 during erasing, there is no risk that the eraser 4, which is removably fitted to the lead tank 5, will settle, and the eraser can be erased. It can be done reliably.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a first embodiment of a sharpening pencil according to the present invention, FIG. 2 is a cross-sectional view showing a second embodiment, and FIG. 3 is a cross-sectional view showing an example of a conventional sharpening pencil. 1...Body, 1a...Tip, 4...Eraser,
5... Core tank, 6... Tank joint, 7... Sleeve for stopper, 8... Knock joint, 9... Knock spring, 10... Chuck shaft, 11...
...Chuck ring receiving sleeve, 13...Dressing hammer, 15...Chuck, 16...Chuck ring, 17...Chuck tightening spring, 1
9...Core, 22...Stopper, 23...Stopper, 24...Brim part, 25...Abutment part, A...
Lead feeding mechanism, a... Core tank side part, b...
Chuck side part.

Claims (1)

[Claims] 1. By swinging the main body 1, the hammer 13 is moved between the core tank side portion a and the chuck side portion b.
The chuck side part b of the core feeding mechanism A consisting of
act on the chuck shaft 10 of the main body 1, and tighten the chuck shaft 10 against the chuck ring 16 which 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 and into which the chuck 15 is fitted. In a sharp pencil in which the chuck 15 can be opened and closed by moving against or by the spring force of the spring 17, and the lead 19 can be pulled out from the tip of the tip part 1a of the main body 1, the lead feeding mechanism A is placed on the lead tank side. It is divided into two parts a and a chuck side part b, and a chuck shaft part 10 of the chuck side part b is attached to the front part of the core tank side part a.
The sharpening pencil is provided with an abutment part 25 for a downward hammer 13 at the rear part of the chuck shaft part 10. 2 By swinging the main body 1, the hammer 13 is moved between the lead tank side part a and the chuck side part b.
The chuck side part b of the core feeding mechanism A consisting of
act on the chuck shaft 10 of the main body 1, and tighten the chuck shaft 10 against the chuck ring 16 which 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 and into which the chuck 15 is fitted. In a sharp pencil that is capable of opening and closing the chuck 15 by moving it against or by the spring force of the spring 17 and feeding out the lead 19 from the tip of the distal end portion 1a of the main body 1, the lead feeding mechanism A is located on the lead tank side. The lead tank side part a has a lead tank 5 in which an eraser 4 is removably fitted to the rear end, and a tank provided at the front end of the lead tank 5. It is composed of a joint 6 and a cylindrical knot joint 8 connected to the front part of the tank joint 6, and a chuck shaft part of the chuck side part b is attached to the front part of the joint 8 which constitutes the core tank side part a. 10
At the same time, the abutment part 25 of the knockdown hammer 13 is provided at the rear part of the chuck shaft part 10, and the outer periphery of the core tank 5 on the side of the tank joint 6 is movably fitted to the inner surface of the main body 1. A notch joint 8 is attached to the stopper 23 at the front of the provided stopper sleeve 7.
The rear end of a stopper 22 at the front of the sleeve is brought into contact with the rear end of the same, and a knock spring 9 is inserted between the stopper 23 at the front of the stopper sleeve and the tank joint 6.