JPH0545514Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a knock-type sharp pencil in which the lead can be drawn out from the tip by means of a notch operation. This sharp pencil is provided between an outer cylinder and a cap, is capable of being knocked, and is capable of drawing out a rod-like object from the rear end of the cap by rotating the cap in the opposite direction.

[Conventional technology]

In conventional sharp pencils, a gap is provided between the outer barrel and the cap to allow for the notch, and by operating the notch on the cap, the writing shaft is activated and the lead is drawn out from the tip. In addition, when erasing characters, the cap is removed to expose the eraser and the characters can be erased.

[Problem that the invention attempts to solve]

However, in the conventional example mentioned above, there is always a gap between the outer cylinder and the cap for the notch, which not only makes it impossible to create a clean appearance, but also causes the force applied to the eraser when erasing characters to cause the eraser to spring. There was a problem in that the eraser sank against the pressure and the characters could not be erased smoothly.

[Means for solving problems]

In order to solve the above-mentioned problems, the sharpening pencil of the present invention has a writing shaft 2 mounted inside an outer cylinder 3 as shown in the first and second figures, and has a spiral path 5 in the front part of the cylindrical body 4.
is provided, and an engaging element 6 that engages with this spiral path 5 is provided on the outer surface.
A core pipe cylindrical receiving part 7 having a core pipe 7 is attached to the core pipe 8 of the writing shaft 2, and the core pipe cylindrical receiving part 7 is movable in the axial direction and locked in the rotational direction with respect to the inner surface of the outer cylinder 3. A holder 9 for a core pipe cylindrical receiving part 7 is provided on the inner surface of the cylindrical body 4, and an axial slit 10 is provided at the rear part of the cylindrical body 4. A rod-shaped object holder 13 is slidably housed in the section so that the rod-shaped object 11 is held and guided through the slit 10, and this rod-shaped object holder 13 has a cylindrical cap 14 that abuts the rear end of the outer cylinder 3. A protrusion 16 is provided on the inner surface of the cap to fit into a spiral groove 15 formed in the same direction as the spiral path 5, and the cylindrical cap 14 and the cylindrical body 4 are fitted together.

[Effect]

When the cylindrical cap 14 is rotated in one direction, the protrusion 16 screwed into the spiral groove 15 of the cylindrical cap 14
is in contact with the front end of the spiral groove 15 and the rod-shaped object holder 13 does not rotate any further, so the cylindrical body 4 is rotated via this holder 13 and the spiral path provided in the front part of the cylindrical body 4 is rotated. The core pipe cylindrical receiving part 7 into which the engager 6 is fitted is movable in the axial direction with respect to the inner surface of the outer cylinder 3 and is locked in the rotational direction, so that the engager 6 can move along the spiral path 5. The cylindrical body 4 moves rearward with respect to the core pipe cylindrical receiving part 7, and the outer cylinder 3 and the cylindrical cap 14 move relative to each other.
A gap for the notch is created between the two and the notch becomes possible. When the rear end of the cylindrical body 4 is knocked, the cylindrical cap 14, the cylindrical lead pipe holder 7, and the core pipe 8 of the writing shaft 2 move forward, and the lead is moved from the tip 1 as in a conventional sharp pencil. It can be played out.

When carried or not in use, the cylindrical cap 14 is rotated in the opposite direction so that the outer tube 3 and the cylindrical cap 14 come into contact with each other, eliminating a gap between them for the size of the notch. When the cylindrical cap 14 is rotated in the opposite direction in this state, the cylindrical cap 14 and the outer cylinder 3
Since the engagement element 6 of the core pipe cylindrical receiving part 7 is in contact with the end of the spiral path 5 of the cylindrical body 4 and the cylindrical body 4 does not rotate, the rod-shaped object holder 1
3 moves rearward along the spiral groove 15 of the cylindrical cap 14, and only the rod 11 protrudes from the rear end of the cylindrical body 4. Since there is no gap between the outer cylinder 3 and the cylindrical cap 14 when the rod-shaped object 11 is used, no knocking movement can occur, so even if a strong force is applied to the rod-shaped object 11, the rod-shaped object 11 will not sink. That's not it.

After using the rod-shaped object 11, the rod-shaped object 11 held in the rod-shaped object holder 13 is removed by rotating the cylindrical cap 14 in one direction in the same way as after the completion of the knock operation.
can be retracted.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a sectional view showing an embodiment of the present invention sharpening pencil, FIG. 2 is a partially exploded perspective view of the main parts of the present invention, and FIG. 3 is a perspective view of the assembled state.

In FIG. 1, 2 is a writing shaft body having a tip 1. In FIG. This writing shaft body 2 has a chuck 24 and a spring 2.
5, a chuck ring 26, a sleeve 28 having a cushion portion 27, and a core pipe 8 connected to the chuck 24. By screwing the tip 1 onto the tip of the outer tube 3, the writing shaft 2 is installed in the outer tube 3 with the tip 1 protruding.

A spiral path 5 is provided in the front part of the cylindrical body 4, and a core pipe cylindrical receiving part 7 having an engaging element 6 that engages with this spiral path 5 on the outer surface is attached to the core pipe 8 of the writing shaft body 2. has been done. The spiral path 5 may be a groove or a slit. The illustration shows the case of a spiral slit.
Both ends of the spiral path 5 are the starting and ending points of the engager 6,
The front end portion of the cylindrical body 4 is provided with one or more slits 23 that open at the front end as necessary, so that the engagement element 6 can be easily engaged with the spiral slit 5 by using the slit 23. Guide recess 2 at the front end
2, and if the front part of the engager 6 protrudes at a right angle and the rear part is made sloped, the engager 6
It is easy to set the cap into the spiral path 5, and it is not easy to separate from the spiral path 5, so even if the cylindrical cap 14 is pulled out a little roughly, the core pipe cylindrical receiving part 7 will not connect to the core pipe 8. In other words, the engaging element 6 never comes off the spiral path 5. This is because when setting the core pipe cylindrical receiving part 7 to the cylindrical body 4, the outer cylinder 3 is still attached.
Since the cylindrical body 4 is not loaded in the outer cylinder 3, the cylindrical body 4 easily expands, the core pipe cylindrical receiving part 7 is relatively easily set, and the core pipe cylindrical receiving part 7 is set in the outer cylinder 3. The inner wall of the outer cylinder 3 prevents the cylindrical body 4 from expanding and the engaging element 6 from separating from the spiral path 5.

In the unlikely event that it comes off, there will be a problem that the core pipe cylindrical receiving part 7 will get in the way and the core will not be able to be supplied to the core pipe 8.
It is necessary to keep this in mind.

A polygonal part 30 provided on the outer surface of the tip of the core pipe cylindrical receiving part 7 is fitted into the polygonal part 29 provided on the inner surface of the outer cylinder 3. Although the receiving portion 7 is freely movable in the axial direction and locked in the rotational direction, the structure is not limited to this, and may be, for example, a structure using a key groove and a key.

A receiver 9 for the core pipe cylindrical receiver 7 is provided on the inner surface of the cylindrical body 4, and axial slits 10 are provided in the opposing rear portions of the cylindrical body 4. A rod-shaped object holder 13 is slidably housed in both sides of the slits 10 so that clamping pieces 12 for clamping a rod-shaped object 11 are guided by the slits 10. Of course, the clamping pieces 12 for clamping the rod-shaped object 11 are
The rod-like object 11 does not necessarily have to be held by the clamping piece 12, but may be held by a cylindrical body.
The stick-shaped object 11 may be an eraser, a stamp, or the like, and in the illustrated example, an eraser is shown.

The clamping piece 12 of the rod-shaped object holder 13 is provided with a protrusion 16 that fits into a spiral groove 15 formed on the inner surface of a cylindrical cap 14 that abuts the rear end of the outer cylinder 3. An annular projection 17 is provided on the inner circumference of the cylindrical cap 14, and an annular projection 17 is provided on the outer surface of the cylindrical body 4.
An engaging portion 18 into which is fitted is provided. The engaging portion 8 is formed by a protruding piece 19 and a step portion 20 provided on the outer surface of the cylindrical body 4.

The outer diameters of the outer cylinder 3 and the cylindrical cap 14 are the same, and an outer ring 21 that abuts the cylindrical cap 14 is provided at the rear end of the cylindrical body 4. This outer ring 21 serves to prevent the rod-shaped object holder 13 from coming off.

In the above configuration, when the cylindrical cap 14 is rotated in one direction, for example, to the left, the protrusion 16 screwed into the helical groove 15 of the cylindrical cap 14 comes into contact with the front end (starting point) of the helical groove 15, and the protrusion 16 screws into the helical groove 15 of the cylindrical cap 14. Since the rod-shaped object holder 13 does not rotate, the cylindrical body 4 is rotated via this holder 13, and the core pipe cylindrical receiver in which the engager 6 is fitted into the spiral slit 5 provided at the front part of the cylindrical body 4 is rotated. The part 7 has a polygonal part 29 provided on the inner surface of the outer cylinder 3, and a polygonal part 30 provided on the outer surface of the tip of the core pipe cylindrical receiving part 7, which is fitted into the polygonal part 29 provided on the inner surface of the outer cylinder 3. Since it is freely movable in the axial direction and locked in the rotational direction, the engaging element 6 moves relatively along the spiral slit 5, and the cylindrical body 4 moves rearward with respect to the core pipe cylindrical receiving part 7. As a result, a gap corresponding to the knocking distance is created between the outer cylinder 3 and the cylindrical cap 14, and the knocking becomes possible. Cylindrical body 4
When the rear end is knocked, the cylindrical cap 14, the cylindrical lead pipe holder 7, and the lead pipe 8 of the writing shaft body 2 move forward, and the lead 3 moves forward as in a conventional sharp pencil.
1 can be fed out from tip 1.

When carrying or not in use, rotate the cylindrical cap 14 in the opposite direction, that is, to the right, to remove the outer case 3.
The outer cylinder 3 and the cylindrical cap 14 are brought into contact with each other, and there is no gap for the notch between them, and since the outer diameters of the outer cylinder 3 and the cylindrical cap 14 are made the same diameter, a clean appearance is provided. In this state, the cylindrical cap 1
4 in the right direction, no gap is created between the cylindrical cap 14 and the outer cylinder 3, and the spiral path 5 of the cylindrical body 4 is
Since the engaging element 6 of the core pipe cylindrical receiving part 7 is in contact with the end of the cylindrical body 4 and the cylindrical body 4 does not rotate, the rod-shaped object holder 13 moves rearward along the spiral groove 15 of the cylindrical cap 14. , only the eraser 11 protrudes from the rear end of the cylindrical body 4. When the eraser 11 is used, there is no gap between the outer cylinder 3 and the cylindrical cap 14, so knocking movement cannot occur, so there is no fear that the eraser 11 will sink even if a strong force is applied to the eraser 11. Therefore, characters can be erased smoothly.

After using the eraser 11, the eraser 11 held by the holding piece 12 of the rod-shaped object holder 13 can be retracted by rotating the cylindrical cap 14 to the left in the same manner as after the completion of the knock operation. Therefore, it is possible to achieve a clean design in terms of appearance, and there is no risk that the eraser 11 will be soiled or broken.

In addition, since the direction of rotation when using the eraser and when operating the knob is clearly differentiated structurally, there is no need for delicate dimensional accuracy from the manufacturer's point of view, and from the user's perspective. For example, since the operation method is clear, malfunctions can be eliminated by displaying simple signs, such as, for example, if the cylindrical cap 14 is turned to the left, it means "knock", and if it is turned to the right, it means "pull out the eraser", thereby making it easier to use. .

FIG. 4 shows another example of the spiral path section according to the present invention. In this example, a slit 5a communicating with the spiral slit 5 from the front end is provided, and this slit 5a is provided with a neck portion 5b. It performs exactly the same function as above.

As the stick-like object 11, other than an eraser, a stick-like object such as a seal, a crayon, a lipstick, etc. can be used.

[Effects of the invention] As is clear from the above explanation, according to the present invention, a gap for the knob is created between the outer cylinder 3 and the cylindrical cap 14 only when the knob is operated, and when carrying or carrying. Since there is no gap between the outer cylinder 3 and the cylindrical cap 14 when not in use, not only can the appearance be kept clean, but also the outer cylinder 3 and the cylindrical cap 14 can be easily connected to each other when a rod-shaped object is used. Since there is no gap between the rod-shaped cap 14 and the rod-shaped cap 14, no knocking movement can occur.
Even if a strong force is applied to 1, there is no fear that the rod-like object 11 will sink, and the rod-like object 11 can be used smoothly and reliably.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the sharp pencil of the invention, Fig. 2 is a partially exploded perspective view of the main parts of the invention, Fig. 3 is a perspective view of its assembled state, and Fig. 4 is a diagram of the invention. It is a perspective view which shows another example of a spiral path part. 1... Tip, 2... Writing shaft, 3... Outer cylinder, 4
...Cylindrical body, 5...Spiral path (slit), 6...
Engagement element, 7... Core pipe cylindrical receiver, 8... Core pipe, 9... Receptacle, 10... Slit, 11... Rod-shaped object (eraser), 12... Clamping piece, 13... Rod-shaped object holder , 14... Cylindrical cap, 15... Spiral groove, 16... Protrusion, 17... Annular protrusion, 18...
Engagement portion, 19... Projection piece, 20... Step portion, 21...
...outer ring, 23...slit.

Claims (1)

[Claims for Utility Model Registration] (1) The writing shaft body 2 is installed inside the outer cylinder 3, a spiral path 5 is provided in the front part of the cylindrical body 4, and this spiral path 5 is formed on the outer surface.
A core pipe cylindrical receiving part 7 having an engaging element 6 that engages with the core pipe 8 is attached to the core pipe 8 of the writing shaft 2, and this core pipe cylindrical receiving part 7 is freely movable in the axial direction with respect to the inner surface of the outer cylinder 3. and has a structure locked in the rotational direction, a receiver 9 for the core pipe cylindrical receiving part 7 is provided on the inner surface of the cylindrical body 4, and an axial slit 10 is provided in the rear part of the cylindrical body 4, A rod-shaped object holder 13 is slidably housed in the rear part of the cylindrical body 4 so that the rod-shaped object 11 is held and guided through the slit 10. A sharp pencil in which a protrusion 16 that fits into a spiral groove 15 formed in the same direction as the spiral path 5 is provided on the inner surface of the cylindrical cap 14 that comes into contact with the cylindrical cap 14, and the cylindrical cap 14 and the cylindrical body 4 are fitted together. (2) The sharp pencil according to claim 1, wherein the outer cylinder 3 and the cylindrical cap 14 have the same outer diameter. (3) Utility model registration claim 1, in which both ends of the spiral path 5 are the starting and ending points of the engaging element 6, and the opposing front end portions of the cylindrical body 4 are provided with slits 23 that open at the front end. The sharpening pencil according to any of item 2. (4) An annular projection 17 is provided on the inner surface of the cylindrical cap 14 , and an engaging portion 18 into which the annular projection 17 fits is provided on the outer surface of the cylindrical body 4 . The protruding piece 19 and the stepped portion 20 provided on the
A sharpening pencil according to any one of claims 1 to 3 of the utility model registration claims. (5) The sharp pencil according to any one of claims 1 to 4, which is a registered utility model, and includes an outer ring 21 that abuts the cylindrical cap 14 at the rear end of the cylindrical body 4.