JPH065198Y2 - Writing instrument - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a writing instrument such as a mechanical pencil and a ballpoint pen, and more particularly to a writing instrument capable of displaying core hardness, color classification, classification, and the like.

[Conventional technology]

Conventionally, in the case of a writing pencil of this type, for example, in the case of a mechanical pencil, since the core hardness indicating sleeve is simply rotatably fitted to the inner surface of the outer cylinder, the outer dimensions of the sleeve and the inner diameter of the outer cylinder can be accurately adjusted. It is necessary to measure the size, but it is extremely difficult to measure the size with high precision, and there is a problem that a gap is formed between the outer cylinder and the sleeve and the sleeve is separated from the rear.

[Means for Solving the Problems]

In order to solve the above problems, the writing instrument of the present invention rotatably fits a display sleeve 2 to an outer cylinder 1 as shown in FIGS. 1 and 2, and displays a display portion 3 provided on the sleeve 2. In order to do so, the display window 4 is provided in the outer cylinder 1, and the clip mounting hole 5 provided in the outer cylinder 1 is provided in the clip mounting hole 5.
A clip 6 having an outer cylinder locking portion 7 is attached, and the outer cylinder locking portion 7 of this clip 6 has a tail cap 2a at the rear end of the outer cylinder 1.
The detachment prevention portion 8 of the display sleeve 2 which is in contact with is locked.

[Action]

By rotating the tail crown 2a of the display sleeve 2, the desired display of the display unit 3 can be performed on the display window 4. Also,
Since the separation prevention portion 8 of the display sleeve 2 is locked to the outer cylinder locking portion 7 of the clip 6 mounted in the clip mounting hole 5 of the outer cylinder 1, the display sleeve 2 is separated from the rear. There is no fear.

〔Example〕

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

FIG. 1 is a vertical cross-sectional view showing the structure of the essential part of one embodiment of a writing instrument of the present invention, and FIG. 2 is a side view thereof.

The embodiment shown in the drawing is applied to a mechanical pencil, 1 is an outer cylinder, 10 is a writing tank core tank installed in the outer cylinder 1, and 11 is an eraser holder attached to the rear portion of the core tank 10. , 12 are erasers held in the holder 11, and the eraser 12 may be held in the holder 11 by a holder. Reference numeral 13 is a knock cover attached to the eraser holder 11.

Inside the rear part of the outer cylinder 1, an eraser holder 11 and a knock cover
A core hardness indicating sleeve 2 in which the sleeve 13 is loosely inserted is rotatably fitted, and a tail crown 2a of the sleeve 2 is in contact with a rear end of the outer cylinder 1. An elastic body, for example, an O-ring 9 is fitted between the outer cylinder 1 and the core hardness indicating sleeve 2.
Even if the sleeve 2 is made of metal, the O-ring 9 allows the sleeve 2 to smoothly rotate with respect to the inner surface of the outer cylinder 1 with a heavy touch. The O-ring 9 serves to eliminate backlash due to the gap between the outer cylinder 1 and the sleeve 2 and to smooth the feel of the sleeve 2 during rotation, and to make the inner diameter of the outer cylinder 1 and the outer diameter of the sleeve 2 delicate. Plays a role in alleviating large dimensions. If this O-ring is not provided, it becomes extremely difficult to delicately measure the inner diameter of the outer cylinder 1 and the outer diameter of the sleeve 2.
There is a play between the two due to the gap, and the feeling of rotation of the sleeve 2 is deteriorated.

A core hardness is printed directly on the outer circumference of the core hardness indicating sleeve 2 or an adhesive sticker 3 on which a core hardness indicator is printed is wound, and a display window 4 is provided on the outer cylinder 1 to display the core hardness. It is provided. A clip mounting hole 5 is provided in the rear portion of the outer cylinder 1, and a clip 6 having an outer cylinder locking portion 7 is fitted in the clip mounting hole 5 and the outer cylinder locking portion of the clip 6 is fitted. A separation preventing portion 8 of the core hardness indicating sleeve 2 is locked to the core 7.

When the knock cover 13 is knocked in the above-mentioned configuration, the outer cylinder 1 can be centered through the eraser holder 11 and the lead tank 10 like a known mechanical pencil. When the lead is retracted, the lead can be retracted by pushing the tip of the lead while maintaining the knock cover 3 in the knocked state. When erasing characters, the knock cover 13 can be removed and the exposed eraser 12 can be used to erase characters.

By rotating the crown 2a of the core hardness display sleeve 2, the core hardness display of the seal 3 can be freely changed.
A desired core hardness may be displayed in the display window 4, for example, HB may be displayed when an HB core is placed in the core tank 10. Further, since the separation prevention portion 8 of the core hardness indicating sleeve 2 is locked to the outer cylinder locking portion 7 of the clip 6 mounted in the clip mounting hole 5 of the outer cylinder 1, the sleeve 2 is pushed from the rear side. There is no danger of leaving.

Further, since the O-ring 9 is fitted between the outer cylinder 1 and the sleeve 2, the O-ring 9 eliminates rattling due to the gap between the outer cylinder 1 and the sleeve 2, and the feel of the sleeve 2 relative to the outer cylinder 1 during rotation is improved. Not only can this be done, but also delicate dimensioning of the inner diameter of the outer cylinder 1 and the outer diameter of the sleeve 2 can be alleviated.

The display sleeve 2 of the present invention is not limited to the core hardness display, and it is possible to display the color, type, and other indications. Of course, the present invention is not limited to mechanical pencils, but is also applicable to writing instruments such as ballpoint pens. Of course you can.

[Effect of device]

As described above, according to the present invention, the display sleeve 2 in which the tail crown 2a is brought into contact with the rear end of the outer cylinder is rotatably fitted to the outer cylinder 1, and the separation prevention portion 8 of the display sleeve 2 is provided. , The outer cylinder locking portion 7 of the clip 6 mounted in the clip mounting hole 5 of the outer cylinder 1.
The display of the display portion 3 of the display sleeve 2 can be freely and smoothly changed by rotating the crown 2a, and the display sleeve 2 is not likely to come off from the rear. Further, when it is desired to remove the display sleeve 2 due to a defect or the like, the clip 6 can be removed from the outer cylinder 1 to remove the simple display sleeve 2 and replace it with a good product, which is very convenient.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the construction of the main part of one embodiment of the writing instrument of the present invention, and FIG. 2 is a side view thereof. 1 …… Outer cylinder, 2 …… (core hardness) display sleeve, 2a ……
Tail crown, 3 ... Display (adhesive sticker with core hardness), 4
…… Display window, 5 …… Clip mounting hole, 6 …… Clip, 7 …… Outer cylinder locking part, 8 …… Separation prevention part, 9 …… Elastic body (O ring).

Claims (2)

[Scope of utility model registration request] 1. A display sleeve 2 is rotatably fitted to an outer cylinder 1, and a display window 4 is provided in the outer cylinder 1 to display a display portion 3 provided on the sleeve 2. A clip 6 having an outer cylinder locking portion 7 is mounted in the clip mounting hole 5 thus formed, and a tail cap 2a is brought into contact with the outer cylinder locking portion 7 of the clip 6 at the rear end of the outer cylinder 1. A writing instrument formed by locking the separation prevention portion 8 of the display sleeve 2. 2. The writing instrument according to claim 1, wherein an elastic body 9 is inserted between the outer cylinder 1 and the display sleeve 2.