JPH0545513Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] In this invention, by rotating the cylindrical cap, the eraser is fed out from the rear surface of the cylindrical body, and by knocking the cylindrical body, the lead is fed out from the tip. Concerning sharpening pencils.

[Conventional technology]

Conventional sharp pencils use an eraser by removing the knock cap from the eraser holder that is fitted into the lead tank of the writing shaft, and when the eraser is not in use, the lead can be removed from the tip by knocking the cap attached to the eraser holder. It is configured so that it can be rolled out.

[Problem that the invention attempts to solve]

However, in the above conventional example, since the eraser cannot be fed out, each time the eraser runs out, the eraser holder is removed from the eraser holder, the holder is opened, and the eraser is pulled out by the reduced amount. It was necessary to repeat the troublesome task of closing the eraser and fitting it into the eraser holder.

[Means for solving problems]

In order to solve the above-mentioned problems, the sharp pencil of the present invention has a writing shaft 2 housed in an outer cylinder 3 having a tip 1 as shown in the figure, and a spiral groove 5 formed on the inner surface of the rear part of a cylindrical cap 19. provided, the front part 6 of the cylindrical body 6
A receiving part 9 that contacts the lead tank 8 of the writing shaft body 2 is provided in the inner part a, and a slit 1 is provided in the rear part 6b of the cylindrical body 6.
0 is provided, and the eraser holder 11 is inserted from this slit 10.
The eraser holder 11 is slidably fitted into the slit 10 by fitting the eraser holder 11 into the slit 10, the protrusion 14 is provided on the eraser holder 11, the protrusion 14 is fitted into the spiral groove 5,
The front part 6a of the cylindrical body 6 extends to the inner surface of the rear part of the outer cylinder 3, so that the cylindrical body 6 can be attached to and removed from the outer cylinder 3, and the front part 6a can be freely moved in the axial direction with respect to the outer cylinder 3. , the structure is such that it locks in the direction of rotation.

[Effect]

With this configuration, when the cylindrical cap 19 is rotated, the front portion 6a of the cylindrical body 6 is freely movable in the axial direction with respect to the rear portion of the outer cylinder 3, and is locked in the rotational direction. Since the eraser holder 11 is slidably fitted into the slit 10 of the rear portion 6b of the cylindrical body 6, the eraser holder 11
moves in the axial direction while being guided along the slit 10 of the cylindrical body 6, and the eraser 13 provided on the eraser holder 11 can be moved in and out of the cylindrical body 6 depending on the direction of rotation.

Further, when the rear end of the cylindrical body 6 is knocked, the core tank 8 which is in contact with the receiving part 9 of the cylindrical body 6 together with the cylindrical cap 10 moves forward or backward against the spring 20 or by the force of the spring. By opening and closing the chuck 21, the lead 2
2 can be fed out from the tip 1.

The eraser holder 11 is inserted through the slit 10, and the front part 6a of the cylindrical body 6 extends to the inner surface of the rear part of the outer cylinder 3, so that the cylindrical body 6 can be attached to and detached from the outer cylinder 3. By configuring the front portion 6a to be movable in the axial direction with respect to the outer cylinder 3 and locked in the rotational direction, assembly is easy, the number of parts is small, and it can be manufactured at low cost.

〔Example〕

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

Fig. 1 is a longitudinal sectional view showing an embodiment of the sharp pencil of the present invention, Fig. 2 is a partially exploded perspective view of its main parts, and Fig. 3 is an eraser sandwiched between the slits of the cylindrical body of the present invention. FIG. 3 is a perspective view showing a state in which the pedestal is fitted.

In the figure, 2 is a writing shaft body having a tip 1. The writing shaft 2 includes a chuck 21, a spring 20, a chuck ring 23, a sleeve 24 having a cushion portion 24a, and a lead tank 8 connected to the chuck 21. By screwing the tip 1 onto the tip of the outer cylinder 3, the writing shaft 2 is accommodated in the outer cylinder 3 with the tip 1 protruding.

19 is a cylindrical cap; this cylindrical cap 19
A stepped portion 4 is provided on the front inner surface of the cylindrical cap 19, and a spiral groove 5 is provided on the rear inner surface of the cylindrical cap 19.

Reference numeral 6 denotes a cylindrical body inserted from the rear end of the cylindrical cap 19, and a protruding piece 15 provided by a cut in the outer surface of the approximately central portion of the cylindrical body 6 is locked to the stepped portion 4 of the cylindrical cap 19. has been done. Similarly cylindrical body 6
A receiving portion, for example, a receiving plate 9, which comes into contact with the lead tank 8 of the writing shaft 2 is provided in the front portion 6a of the writing shaft 2.

A polygonal portion 17 is formed on the inner surface of the rear portion of the outer cylinder 3, and a polygonal portion 18 fitted into the polygonal portion 17 is formed on the outer periphery of the front portion 6a of the cylindrical body 6.
Therefore, the front portion 6a of the cylindrical body 6 is freely movable in the axial direction with respect to the rear portion of the outer cylinder 3, and is locked in the rotational direction. The means by which the front part 6a of the cylindrical body 6 is freely movable in the axial direction with respect to the rear part of the outer cylinder 3 and locked in the rotational direction is limited to the means by the polygonal parts 17 and 18 of this embodiment. For example, it may be a means using a keyway and a key.

The cylindrical body 6 has slits 10 at opposing portions of the rear portion 6b. The slits 10 are fitted with two eraser holders 11 inserted through the slits 10.
The two clamping pieces 12 are fitted so as to be freely slidable toward the rear.
The helical groove 5 of the cylindrical cap 19 is fitted with the protrusion 14 provided on each of the clamping pieces 12. Numerals 25 and 26 are annular stopper portions of the eraser holder 11 formed at the front and rear of the slit 10. Therefore, the eraser holder 11 has annular stopper portions 25 and 26 at the front and rear of the slit 10.
It will move axially until it abuts on

A method of assembling the sharpening pencil according to this embodiment with the above configuration will be explained.

First, both sides of the slit 10 of the cylindrical body 6 are bent outward, and the eraser holder 11 is fitted into the cylindrical body 6 through the slit 10 so that both clamping pieces 12 thereof face rearward. The clamping pieces 12 are slidably fitted into both slits 10. Next, the eraser 13 is inserted from the rear end of the cylindrical body 6 and held between both clamping pieces 12, and when the cylindrical body 6 is inserted from the rear end of the cylindrical cap 19 and pushed in, the protruding piece 15 is pushed inward. When the cap 19 bends and passes the step 4 of the cylindrical cap 19, the step 4
to be locked.

The eraser 13 may be held between the holding pieces 12 after the cylindrical body 6 is assembled to the cylindrical cap 19. When the assembly of the cylindrical body 6 to the cylindrical cap 19 is completed, the annular stopper portion 26 of the cylindrical body 6 comes into contact with the rear end of the cylindrical cap 19. It goes without saying that the dimensions of the parts are determined to achieve this condition.

Next, with this cylindrical cap 19, the polygonal part 18 provided on the outer surface of the front part 6a of the cylindrical body 6 is fitted into the polygonal part 17 provided on the inner surface of the rear part of the outer cylinder 3, and the cap is sharpened. Assembling the pencil is complete. In this case, it goes without saying that the cylindrical body 6 should be firmly inserted from the rear of the outer cylinder 3 so that it does not slip out.

Next, its effect will be explained.

When the eraser 13 is not in use, the eraser holder 11 is in contact with the annular stopper 25 at the front of the cylindrical body 6 as shown in the first figure, and the tip of the eraser 13 is in contact with the annular stopper 25 at the rear of the cylindrical body 6. It is in a state where it exactly coincides with the end face of the portion 26.

In this state, when the cylindrical cap 19 is rotated,
The front part 6a of the cylindrical body 6 is movable in the axial direction with respect to the rear part of the outer cylinder 3, and is locked in the rotational direction. Protrusion 14 provided on piece 12
are fitted, so the eraser holder 11 is the second one.
moving in the axial direction while being guided along both slits 10 of the cylindrical body 6 into which two clamping pieces 12 are fitted;
The eraser 13 held between the two holding pieces 12 of the eraser holder 11 can be moved in and out of the cylindrical body 6 depending on the direction of rotation.

Further, when the rear end of the cylindrical body 6 is knocked, the core tank 8 which is in contact with the receiving plate 9 of the cylindrical body 6 together with the cylindrical cap 19 moves forward or backward against the spring 20 or by the force of the spring. By opening and closing the chuck 21, the lead 2
2 can be fed out from the tip 1.

To feed out the eraser 13, rotate the cylindrical cap 19 by the amount of the reduction, and move the eraser holder 11 in the axial direction.
In the illustrated example, this can be done by moving the eraser to the right, and after use, the eraser 13 can be retracted by rotating the cylindrical cap 19 in the opposite direction and moving the eraser holder 11 to the left.

[Effect of idea]

As described above, according to the present invention, the eraser holder 11 can be moved in the axial direction by rotating the cylindrical cap 19 with respect to the outer cylinder 3, and the eraser 13 can be moved in the cylindrical body according to the direction of rotation. Since the eraser 13 can be retracted from the cylindrical cap 19, it is possible to extend the eraser 13 by the necessary amount when erasing characters, and the eraser 13 can be retracted when not in use. Eraser 1 with just rotation operation
3 can be easily performed. Therefore, there is no need to repeat the troublesome work that was done in the past, and while it is convenient, it has a small number of parts and can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the sharp pencil of the present invention, Fig. 2 is a partially exploded perspective view of its main parts, and Fig. 3 shows an eraser holder fitted into the slit of the cylindrical body of the present invention. FIG. 3 is a perspective view showing a closed state. 1... Tip, 2... Writing shaft, 3... Outer cylinder, 4
...Stepped portion, 5...Spiral groove, 6...Cylindrical body, 6a...
...Front part, 6b... Rear part, 8... Core tank, 9... Receiving part (receiving plate), 10... Slit, 1
1... Eraser holder, 12... Holding piece, 13... Eraser, 14... Protrusion, 15... Protruding piece, 17,1
8...polygonal part, 19... cylindrical cap.

Claims (1)

[Claims for Utility Model Registration] (1) A writing shaft 2 is housed in an outer cylinder 3 having a tip 1, and a spiral groove 5 is formed on the inner surface of the rear part of the cylindrical cap 19.
, a receiving part 9 that contacts the lead tank 8 of the writing shaft 2 is provided in the front part 6a of the cylindrical body 6, and a slit 10 is provided in the rear part 6b of the cylindrical body 6,
By fitting the eraser holder 11 into the slit 10, the eraser holder 11 is inserted into the slit 10.
A protrusion 14 is provided on the eraser holder 11, and the protrusion 14 is fitted into the spiral groove 5, so that the front part 6a of the cylindrical body 6 extends to the inner surface of the rear part of the outer cylinder 3, and the cylindrical A sharp pencil having a structure in which the shaped body 6 is detachable from the outer cylinder 3, and the front part 6a is movable in the axial direction with respect to the outer cylinder 3 and locked in the rotational direction. (2) A stepped portion 4 is provided on the front inner surface of the cylindrical cap 19, and a protruding piece 15 provided by a cut on the outer surface of the cylindrical body 6 is locked to the stepped portion 4. The sharp pencil according to item 1. (3) The configuration in which the front portion 6a of the cylindrical body 6 is movable in the axial direction with respect to the outer tube 3 and locked in the rotational direction is achieved by the polygonal portion 1 formed on the inner surface of the rear portion of the outer tube 3.
7 and a polygonal portion 18 that is fitted into the polygonal portion 17 and formed on the outer surface of the front portion 6a of the cylindrical body 6. Sharpening pencil.