JPS6335371Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a flexible pen used for recorders and the like.

Conventionally, this type of flexible pen used a cylindrical core mount with a circular cross section (corresponding to number 4 in the drawing),
The distance from the ink storage cylinder (corresponding to code 2) becomes smaller, which not only increases the resistance to the flow of ink, but also causes the disadvantage that the vertical movement of the core mount (corresponding to code 4) lacks smoothness. .

The purpose of the present invention is to overcome the drawbacks of the conventional swivel pen.

Embodiments of the present invention illustrated in the drawings will be described below.

(Explanation of symbols) 1 indicates the entire flexible pen of the present invention. Reference numeral 2 denotes an ink storage cylinder, and a tail plug 2b is attached to the rear end of the main body 2a, and a lead holder holding cylinder 2c is detachably attached to the tip with screws _S1 and _S2, respectively.

3 is an ink injection pipe, which is inserted into the tail plug 2b.

4 is a core mounting tube with a stainless steel core wire 5 at its lower end.
Attach.

The core mounting tube 4 has a built-in weight G made of lead, iron, etc., and this weight G is covered with corrosion-resistant and wear-resistant plastic.

The core mounting tube 4 has a square cross section, and its lower end forms a wedge-shaped portion 4a, and a recessed portion 4c is provided along the bottom side 4b.

6 is an annular felt made by extrusion molding a bundle of plastic filaments used in general felt pens, which are bonded together with an adhesive.
An ink flow hole 6a is bored in the center thereof. This flow hole 6 adjusts the flow of ink as described later, and when ink is injected into the storage cylinder 2 and used,
Ink level h in air storage cylinder 2 (Fig. 10)
It acts to draw out the space above.

In this way, air is prevented from entering the ink. 7 is a lead holder, and a lead holder holding cylinder 2c
The core wire 5 is fitted into the core wire 5, and the inner periphery thereof forms an ink outlet hole 8.

9 is a cap, 10 is an annular ring, which is fitted into the upper end opening of the main body 2, and when disassembled for cleaning,
This is to prevent the core attachment body 4 from falling off.
11 is the ink tank, L ₁ is the gap between the core mount 4 and the main body 2a as shown in FIG. 9, L ₂ is the gap between the wedge-shaped part 4a of the core mount 4 and the main body 2a, and L ₃ is the wick. This is the gap between the recess 4d of the attachment body 4 and the bottom surface of the main body 2a. Next, the operation of the present invention will be explained.

(Explanation of operation) When ink is injected from the ink injection pipe 3 into the ink storage cylinder 2 as shown in Figure 10, the gap L ₁ between the storage cylinder 2 and the core mounting body 4,
It reaches the annular felt 6 through L ₂ and L ₃ . Further, the ink passes through the ink flow holes 6a of the annular felt 6 and the gaps between the fibers of the felt 6, and reaches the gap _L4 on the lower surface of the felt 6. Then, the ink enters the ink outlet hole 8 of the core holder 7 due to capillary action with the core wire 5, and in this state, the flow of ink stops. When injecting ink, it is preferable to inject the ink with the storage cylinder 2 in an inverted state, since the air contained therein can be expelled to the outside.

When the pen tip is placed on the paper surface to draw a line as shown in ○ and b in FIG. 10, the core wire 5 rises together with the lead holder 4, and the ink oozes out from the ink outlet hole 8 to draw a line.

When the ink level h decreases to h' as shown in Figure 10, the air pressure _r1 of the air a in the ink storage cylinder 2 decreases, and the ink is pushed from the ink tank 11 by the atmospheric pressure r. It is supplied into the housing cylinder 2. In this way, the ink level h
is retained and the ink continues to bleed out at a constant rate.
The writing medium holder 4 has its rectangular corners in contact with the inner wall of the storage tube 2, and has less friction than the conventional circular cross section, and is free to move up and down and rotate.
It operates more easily than conventional flexible pens.

Retain functionality. Ink flow also improves.

If the ink adheres to the felt 6 or the lead holder 8, turn the screw S ₂ to remove the lead holder holding cylinder 2c from the main body 2a.
Just clean it.

Also, in FIGS. 1 and 8, the annular ring 10
is fitted into the upper end opening of the main body 2a to prevent the core attachment body 4 from slipping out from the main body 2a when disassembled for cleaning.

(Effects of the present invention) Since the core mounting body 4 has a regular polygonal cross section and the lower end forms the wedge-shaped portion 4a, it is movable up and down and rotatable with respect to the inner circumferential wall of the storage cylinder 2, and when injecting ink. , it is possible to confine air a in the upper part of the housing cylinder 2.

That is, since gaps L ₁ , L ₂ , and L ₃ are formed between the housing tube 2 and the core attachment body 4, respectively,
When ink is injected, the ink flows through these gaps L ₁ , L ₂ ,
Since it reaches the ink outlet hole 8 through L ₃ , air a is trapped above the ink level h in the storage cylinder 2 . As a result, ink is supplied in response to the decrease in the pressure _r1 of air a, making continuous work possible.

Since the annular felt 6 is used, the ink does not spray out into the ink outlet hole 8 all at once, and smooth line writing is possible. Furthermore, since a gap _L4 is also formed between the felt 6 and the inner surface of the lead holder holding cylinder 2c, the ink leached from the felt 6 is temporarily stored in this gap _L4 , so that the ink leaches more evenly. becomes possible.

Further, since the felt 6 is provided with an ink flow hole 6a, the air inside the storage cylinder 2 during use rises through the ink flow hole 6a and escapes into the space above the ink level h. In this way, the incorporation of air into the ink is reduced.

[Brief explanation of the drawing]

Figure 1: Front sectional view of the flexible pen of the present invention, Figure 2:
Side view of ink storage cylinder 2, Fig. 3: Fig. 2-
View from the arrow, Figure 4: Figure 2 - View from the arrow, Figure 5:
Perspective view of the annular felt 6, FIG. 6: Core holder 7
FIG. 7: A perspective view of the annular ring 10. FIG. 8: A partially missing perspective view of the ink storage cylinder 2.
Figure: Gap formed between core mount 4 and ink storage cylinder 2
Explanatory diagram of L ₁ , L ₂ , L ₃ , FIG. 1: Flexible pen, 2: Ink storage cylinder, 2a: Main body, 2b: Tail plug, 2c: Lead holder holding cylinder, 3:
In injection pipe, 4: core attachment body, 4a: wedge-shaped part,
4b: bottom, 4c: recess, 5: core wire, 6: annular felt, 6a: ink flow hole, 7: core holder,
8: Ink outlet hole, 9: Cap, 10: Annular ring, 11: Ink tank, L ₁ : Gap, L ₂ : Gap, L ₃ : Gap, L ₄ : Gap, S ₁ : Screw, S ₂ : Screw ,
G: Weight.

Claims (1)

[Claims for Utility Model Registration] A regular polygon in cross section, the lower end forming a wedge-shaped portion 4a,
In addition, a recess 4c along the bottom 4b is formed in the bottom 4b of the wedge-shaped portion 4a, and a core attachment body 4 has a core wire 5 attached to the recess 4c, and an ink flow hole 6a in the center; 6
The core attachment body 4 is housed in the ink storage cylinder 2 so as to be in contact with the circular inner circumferential wall thereof, and the core wire 5 is provided on the lower surface of the ink storage cylinder 2. A flexible pen for use in a recorder, etc., characterized by having an annular felt 6 inserted so as to pass through an ink flow hole 6a.