JPH0415513Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention allows the weight body for feeding to act on the core feeding mechanism by lightly swinging the main body, and operates this core feeding mechanism to release the material from the centering opening at the tip. The present invention relates to a sharpening pencil that can send out a lead, and particularly to a mechanism that can prevent the eraser from settling during erasing operations and ensure erasing.

[Conventional technology]

An example of a conventional swing sharpening pencil is shown below.
To explain with reference to the figure, the main body 1 includes a lead feeding mechanism 4 that feeds out the lead 3 from the centering port 2 at the tip, and the lead feeding mechanism 4 feeds out the lead between the outer periphery of the lead tank 5 and the inner periphery of the main body 1. The eraser 7 is fitted into the end of the lead tank 5 of the lead feed mechanism 4 so as to protrude from the opening at the head end of the main body 1. .

In this conventional example, when the main body 1 is lightly swung, the feeding weight body 6 reciprocates in the axial direction and knocks the base of the lead tank 5 of the lead feeding mechanism 4, thereby being connected to the lead tank 5 and chuck ring 1.
The chuck 11 fitted into the chuck 11 opens and closes against the spring force of the spring 12 or is moved by the spring force, and the lead 3 is sent out from the chuck 11 and the lead 3 is sent out from the centering port 2 at the tip. It is something that can be done.

[Problem that the invention attempts to solve]

However, in the case of the above-mentioned conventional swing sharpening pencil, the lead tank 5 has a mechanism in which the lead feeding mechanism 4 is operated by reciprocating the feeding weight body 6 and uses its weight to feed out the lead 3. The spring 12 that supports the paper must have a weak spring force, so when erasing characters using the eraser 7, the spring 1 is
2 is bent, and the eraser 7 sinks into the main body 1, making it impossible to erase characters.

[Means for solving the problem] In this invention, when erasing, always erase characters with the crown of the sharp pencil (eraser side) facing down on the paper surface, and at that time, the weight for feeding out will fall due to its own weight. Therefore, this idea was developed by focusing on the fact that this heavy body can be used to prevent the settling of the lead tank and, in turn, the settling of the eraser.

That is, the mechanism of the present invention includes a core feeding mechanism 4 in the main body 1 that feeds out the core 3 from the centering port 2 at the tip,
A feeding weight body 6 is housed between the outer periphery of the lead tank 5 of the lead feeding mechanism 4 and the inner periphery of the main body 1 so as to be movable in the axial direction. In a sharpening pencil in which an eraser 7 is fitted so as to protrude from the end opening, the end 6a of the weight body 6 is placed on the inner periphery of the main body 1 or the outer periphery of the lead tank 5 near the eraser 7 during erasing work. An anti-settling claw 8 made of an elastic material that can be fitted and expanded by falling due to a fall is provided, and a protrusion 9 that engages the core tank 5 by coming into contact with the tip of the spread anti-settling claw 8 is provided. The structure is such that it is provided on the outer periphery of the core tank 5 or on the inner periphery of the main body 1.

[Effect]

When the main body 1 is held with the eraser 7 side facing down in order to erase characters, the feeding weight body 6 falls due to its own weight and its triangular cross-sectional end 6a touches the anti-settling claw 8 and the inner periphery of the main body 1 or By fitting between the outer circumference of the core tank 5 and the anti-settling claw 8, the anti-sedimentation claws 8 are pushed out and the tips of the claws come into contact with the outer circumference of the core tank 5 or the protrusion 9 on the inner circumference of the main body 1, thereby engaging the core tank 5. It is possible to prevent the eraser 7 fitted into the lead tank 5 from settling and erase the characters reliably.

〔Example〕

FIG. 1 is a sectional view showing a swing sharpening pencil equipped with a first embodiment of the mechanism of the present invention in a writing state, and FIG. 2 is a sectional view showing the same in an erasing state.

First, the configuration of the first embodiment will be explained.

In Fig. 1, 1 is a main body, 4 is a core feeding mechanism housed in this main body 1, and a centering port 2 at the tip.
This is for feeding out the core 3.

This lead feeding mechanism 4 includes a lead tank 5, a chuck 11 connected to the base end of the lead tank 5,
It consists of a chuck ring 10 fitted to the inner periphery of the main body 1 and fitted into the chuck 11, and a spring 12 inserted between the inner periphery of the main body 1 and the proximal end of the core tank 5.

Reference numeral 7 denotes an eraser, which is fitted onto the inner periphery of the end of the lead tank 5 so as to protrude from the head end opening of the main body 1. 7a is an eraser holder, and 7b is an eraser cap fitted to the outer periphery of the end of the lead tank 5 so as to cover the eraser 7. This eraser cap 7b may be attached to the eraser 7.

Reference numeral 6 denotes an annular feeding weight body, which is housed between the outer periphery of the core tank 5 and the inner periphery of the main body 1 so as to be freely movable in the axial direction. The end of the weight body 6 on the eraser 7 side has an inclined surface 6 ₁ on the inner periphery of the end and an annular notch 6 ₂ on the outer periphery of the end. End portion 6 having a triangular cross section
It becomes a.

A ring 8a made of an elastic material is fitted to the inner circumference of the main body 1 or the outer circumference of the lead tank 5 near the eraser, in this first embodiment, the inner circumference of the main body 1 near the eraser. During the erasing operation, the end portion 6a of the weight body 6, which has a triangular cross section, falls under its own weight and is fitted into and spread out by one or more anti-settling claws 8 in the illustrated example.
are provided in one piece by cutting and raising. The claw 8 may be provided directly on the inner periphery of the main body 1.

Next, the operation of the first embodiment will be explained.

When centering for writing, when the main body 1 is lightly swung, the weight body 6 for feeding out reciprocates in the axial direction and knocks the base of the lead tank 5 of the lead feeding mechanism 4. The chuck 11 connected to the chuck ring 10 and fitted into the chuck ring 10 resists the spring force of the spring 12 or is moved by the spring force to open and close the chuck 11.
The core 3 can be fed out through the centering port 2 at the tip.

In this case, even if the end portion 6a of the weight body 6, which has a triangular cross-section, may fit between the anti-settling claw 8 and the ring 8a, it will be easily separated due to the weight of the weight body 6. , it does not interfere with the centering operation.

Also, eraser cap 7b is used to erase characters.
When the body 1 is held with the eraser 7 side facing down, the feeding weight body 6 falls due to its own weight, and its end portion 6a, which has a triangular cross section, fits between the anti-settling claw 8 and the ring 8a. Possibly ring 8
The end of a on the weight body side enters into the annular notch 6 ₂ , and the anti-settling claw 8 is pushed out by the inclined surface 6 ₁ and comes into contact with the protrusion 9 on the outer periphery of the core tank 5 , and the core tank 5 is It will lock (see Figure 2).

Therefore, the reaction force acting on the eraser 7 fitted on the inner periphery of the end of the lead tank 5 is received by the tip of the anti-settling claw 8, so that the eraser 7 does not settle and the characters can be erased reliably. can.

Note that the protrusion 9 in the first embodiment also serves as a stopper for the eraser cap 7b.

FIG. 3 is a cross-sectional view showing the main parts of the swing sharpening pencil according to the second embodiment during erasing work.

In this second embodiment, the end of the weight body 6 on the eraser 7 side is an end 6a having a triangular cross section with an inclined surface 6 ₁ on the outer periphery of the end, and a portion of the outer periphery of the lead tank 5 closer to the eraser has an end 6a. A plurality of fitting holes 5a (in the illustrated example) are provided, and each fitting hole 5a is provided with one or more (in the illustrated example) a plurality of settling prevention claws 8 made of an elastic material on the inner periphery of the base. A fitting protrusion 8b is fitted, and a protrusion 9 is provided on the inner periphery of the main body 1 to engage the core tank 5 in opposition to the tip of the spread anti-settling claw 8.
Of course, after fitting the base portion having the anti-sedimentation claw 8 into the core tank 5, it is also possible to integrate the base portion by doweling or caulking with a punch or the like.

In the case of this second embodiment, the weight body 6 is
The end portion 6a, which has a triangular cross section, fits between the sedimentation prevention claw 8 and the outer periphery of the core tank 5, whereby the sedimentation prevention claw 8 is pushed out and the tip of the claw is brought into contact with the protrusion 9 on the inner periphery of the main body 1. Since the lead tank 5 is locked in contact with the eraser 7, the eraser 7 does not settle, and the eraser can be reliably erased.

The base end of the anti-settling claw 8 of the second embodiment also serves as a stopper for the eraser cap 7b.

FIG. 4 is a cross-sectional view showing the main parts of the swing sharpening pencil according to the third embodiment during erasing work.

This third embodiment is different from the second embodiment in that a sedimentation prevention pawl 8 is provided by cutting and raising on the outer periphery of the lead tank 5 near the eraser, and the eraser can be erased reliably in the same manner as described above. can.

In any of the above embodiments, the structure can be made small and simple, and can be easily implemented. In the case of the conventional example, if a spring 12 with a strong spring force is used to prevent the eraser 7 from settling, the centering operation becomes difficult and the knocking noise caused by the weight body 6 becomes louder. Furthermore, when a spring 12 with a strong spring force is used, in order to facilitate the centering operation, the weight body 6 must be made large to increase its weight, resulting in a large structure.

In the case of the present invention, even if the spring 12 with a weak spring force is used, the settling of the eraser 7 can be completely prevented, so the centering operation will not become difficult, the knocking sound will not become loud, and the heavy body 6 will not be large. There's no need to shape it. Furthermore, the present invention is a convenient sharp pencil whose lead can be drawn out and stored not only by a swing operation but also by a rear end notch operation using the eraser cap 7b.

[Effect of idea]

As described above, according to the present invention, during erasing work, the end portion 6a of the feeding weight body 6 is connected to the anti-settling claw 8 provided on the core tank 5 or the main body 1 and the inner periphery of the main body 1 or the outer periphery of the core tank 5. During this period, it falls due to its own weight and is inserted, thereby pushing and spreading the anti-sedimentation claw 8, and inserting the tip of the claw into the outer periphery of the core tank 5 or the main body 1.
Since the lead tank 5 is locked against the protrusion 9 provided on the inner periphery of the lead tank 5, the eraser 7 fitted to the end of the lead tank 5 will not settle down, ensuring reliable erasing. be able to.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a swing sharpening pencil equipped with the first embodiment of the mechanism of the present invention in a writing state, Fig. 2 is a sectional view showing the same in an erasing state, and Fig. 3 is a sectional view showing the swing sharpening pencil in a writing state. A cross-sectional view showing the main parts of the swing sharpening pencil equipped with the second embodiment during erasing work, and Fig. 4 shows the main parts of the swing sharpening pencil equipped with the third embodiment during erasing work. FIG. 1... Main body, 2... Core outlet, 3... Core, 4...
... Lead feeding mechanism, 5... Lead tank, 6... Weight body for feeding, 7... Eraser, 8... Sedimentation prevention claw, 9... Protrusion.

Claims (1)

[Scope of utility model registration request] In a sharp pencil that uses the inertia of a heavy body to gradually draw out the lead by swinging the shaft, when erasing, the end of the heavy body is connected to the lead tank or the settling prevention claw provided on the main body and the inside of the main body. It fits between the core tank and the outer circumference of the core tank by falling due to its own weight, and the core tank is locked with the tip of the anti-settling claw facing the protrusion provided on the outer circumference of the core tank or the inner circumference of the main body. A sharp pencil that is characterized by: