JPS6228467Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a writing instrument having a cap that removably fits into the writing tip of the main body and the distal end of the main body where a detachable eraser cover is disposed.

Conventionally, for the purpose of protecting the writing tip of a well-known knock-type sharp pencil from which the lead protrudes, a cap is provided that removably fits on the writing tip, and while the sharp pencil is being used for writing, In order to prevent the cap from being lost, a device is known that is configured to be removably fitted to the end of the main body where an eraser cover that also serves as a knock rod is provided. When using such a sharpening pencil to erase the erroneously written portion, first remove the cap from the end, then remove the eraser cover to expose the eraser, which is inconvenient and inconvenient. Ta.

The present invention eliminates such inconvenience.

Specifically, the structure is such that, with the cap fitted to the end of the main body, the cap alone or the cap and the eraser cover can be removed at the same time.

Examples will be described below.

A is a writing instrument body configured as a known knock-type mechanical pencil.

Reference numeral 1 designates a shaft cylinder, and within the shaft cylinder 1, a core cylinder 2 having a distal end connected with a feeding mechanism (not shown) is slidably mounted.

An erasing body 4 held by a holder 3 is removably fitted into the opening of the core tube 2. 5
1 is an eraser cover whose end is closed and an annular protrusion 6 is formed on the outer periphery.

The cover 5 is removably fitted onto the core tube 2 to hide the eraser 4.

Reference numeral 7 denotes a cap configured to be removably fitted to the writing tip 8 and the distal end 9 on which the cover 5 is disposed.

The cap 7 is composed of a bottomed cap main body 11 having a plurality of inward protrusions 10 protruding from the tip thereof, a cylindrical clamping body 12 and a clip 13 mounted inside the main body 11.

The holding body 12 is made of metal such as stainless steel, polyamide,
It is made of an elastic material such as a synthetic resin such as polypropylene, which deforms when subjected to external force, but returns to its original shape when the external force is removed. The short diameter part of the bullet piece 18 formed by punching the window hole 16 in its natural state connected to the bullet piece 18 is smaller than the outer diameter of the cover 5, and the longer diameter part is larger than the outer diameter of the cover 5. It consists of a clamping cylinder part 19 that is expandable and deformable and has an elliptical cross-section, and a pressing part 20 that projects from the top of the clamping cylinder part 19.

The holding body 12 has a bottom part 15 in contact with the bottom of the cap body 11, a pressing part 20 facing an opening 21 formed in the circumferential surface of the main body 11, and a head part 22 of the clip 13 in contact with the pressing part 20. With the clips facing each other, the screw 25 is screwed into the threaded tube 24 of the clip 13 fitted into the through hole 23 at the bottom of the cap body 11 and the through hole 14 of the clamping body 12 to open the cap body 1.
1 and clip 13.

Therefore, when the cap 7 is fitted to the distal end 9, the eraser cover 5 is held between the clamping cylinder parts 19 as shown in FIG. 2, so when the cap 7 is removed in this state, the cap 7 and the erasing body cover 5 is also removed from the core tube 2 to expose the erasing body 4.
Eraser 4 can be used.

At this time, it goes without saying that the clamping force of the erasing body cover 4 of the clamping cylinder portion 19 is set to be greater than the fitting force between the core tube 2 and the erasing body cover 5.

Also, when discontinuing use from the state shown in FIGS. 1 and 2 and fitting the cap 7 to the writing tip 8, move the head 22 of the clip 13 in the axial direction as shown in FIG. When pressed, the clamping cylinder part 19 expands, the short diameter part becomes larger than the outer diameter of the eraser cover 5, and the clamping of the cover 5 is released.

When the cap 7 is removed from the distal end in this state, only the cap 7 is removed with the eraser cover 5 fitted to the core tube 2, and it is fitted onto the writing tip 8 to protect the writing tip 8. can.

When using the writing instrument A, from the above-mentioned state, the head 22 of the clip 13 is similarly pressed in the axial direction and removed from the writing tip 8, then fitted into the end 9 in that state, and then When the pressure is released, the clamping cylinder 19 returns to its original state due to its elasticity, and the eraser cover 5 is clamped as shown in FIGS. 1 and 2.

FIGS. 5 and 6 show other embodiments. In this embodiment, the holding body 112 is formed in a natural state into a short cylindrical shape with a polygonal cross section in which each side is slightly curved inward, and the distance between the opposing sides is set from the outer diameter of the eraser cover 105. The outer diameter of the cap body 111 is slightly larger than the inner diameter of the cap body 111.

One corner of the holding body 112 is formed high and serves as a pressing part 120, and is press-fitted into the cap main body 111 so that the pressing part 120 faces the opening 121 of the cap main body 111 and is elastically attached.

Therefore, the cap 107 is connected to the main body A as shown in FIG.
When the cap 107 is fitted to the distal end 109 of the cap, the eraser cover 105 is not held between the clamping members 112 as shown in FIG.
09, only the cap 107 is removed.

However, when the head 122 of the clip 113 is pressed in the axial direction as shown in FIG. 105 will be held.

If the cap 107 is removed from the end portion 109 in this state, the erasing body cover 105 is also removed and the erasing body 104 is exposed and can be used. still,
In the embodiment, the pressing portion is configured to face the head of the clip, but the pressing portion may be formed as a push button.

Further, the pressing part does not need to be provided in a particularly protruding manner; for example, the opening 21 shown in FIG. 1 may be made large and the clamping cylinder part 19 can be directly pressed with a claw or the like, thereby making this part the pressing part.

As described above, the present invention is constructed so that the cap alone or the cap and the eraser cover can be removed from the distal end while the cap is fitted to the distal end of the main body, so that it can be used more conveniently. still,
The present invention can be used not only for sharpening pencils, but also for writing instruments that combine an eraser containing an ink eraser and a ballpoint pen or marking pen.

[Brief explanation of the drawing]

Fig. 1, partially omitted sectional view of the embodiment of the present invention, Fig. 2
Fig. 3, Fig. 1 a-a sectional view (action explanatory diagram), Fig. 4, perspective view of the clamping body, Fig. 5 and Fig. 6.
FIG. 1 is an explanatory view of the operation of the present invention and other embodiments corresponding to FIG. 1a-a. A...Writing instrument body, 4,104...Erased body,
5,105... Eraser cover, 8,108... Tip, 9,109... End, 7,107... Cap, 12,112... Holding body, 20,120
... Pressing part, 21, 121 ... Opening.

Claims (1)

[Scope of utility model registration request] In a writing instrument that has a cap that removably fits into the writing tip of the main body and the distal end where the removable erasing body cover is provided, when the cap is fitted into the cap at the distal end, the erasing body cover is removed. A cylindrical clamping body that can be expanded and contracted to hold the eraser cover in a natural state or a pressed state is attached, and a pressing part is formed on the outer periphery of the clamping body, and the pressing part is used as a cap. A writing instrument characterized by facing through an opening formed on the circumference.