JP2681750B2 - Ball pen barrel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a specification of a shaft cylinder including a grip portion of a ball-pen for use in office writing such as writing on a leaflet slip requiring long-time writing or strong writing pressure. Regarding

[0002]

2. Description of the Related Art Problems to be Solved by the Prior Art The present invention is not limited to ball-point pens, but for shafts of writing instruments, from pencils to writing brushes, to prevent slipping and reduce writing fatigue, or to write From the viewpoint of practicality and aesthetics, various corrections have been made to the correction means including the grip portion.

On the other hand, the reason why the ball-point pen is generally used as a writing instrument for office work as it is today is that the transparent axis clearly shows how much ink is consumed, and the handwriting does not get dirty or erased. It does not break, it is cheaper than anything else,
Like a pencil, it does not have to be used up like a pencil, and if there is no ink like a felt-tip pen, there is no waste of money to throw it away, and there is no need for a lead pencil to be pulled out like a sharp pencil. It is popular because it does not bleed into the paper and is popular, but it is cheap, durable and long-lasting.

However, this ball-point pen also has some crying points, one of which is that if the writing is continued for a long time or with a strong writing pressure, fatigue is accumulated on the fingers, shoulders and arms, and this is solved. Therefore, various attempts have been made to improve the grip portion, that is, the grip portion of the barrel.

However, although these improvements have been effective in enhancing the function of the grip portion, the ball-point pen which is easily used as an office writing instrument,
The remaining amount of writing, that is, how much ink remains is made unclear by superimposing a shaft cylinder and a different grip member.

Therefore, without considering the fixing of the grip member and the barrel in the axial direction or the radial direction as shown in FIG.
There are many cases where the shaft cylinder is simply covered with a grip member made of a cylindrical soft material, but the grip member is relatively free to move and the amount of ink remaining can be confirmed, but on the other hand, the grip feels stable during writing. It is hard to say that it is not the best, and the improved product in which the grip member is fixed to the shaft cylinder has a defect that it is hidden by the grip member and the amount of ink remains unknown as described above.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned state of the art, and the grip portion of a transparent or color-transparent barrel is formed to have a smaller diameter.
A grip part made of an elastic soft material is provided, which has a protrusion on the same surface as the outer diameter of the shaft cylinder, and a through hole for fitting with the protrusion is formed on the grip. Further, a means for solving the problem is formed by forming a brim portion in contact with the end portion of the grip member and a cap fitting portion having a diameter one step smaller than the outer diameter of the shaft cylinder.

[0008]

According to the present invention, by disposing a soft material having elasticity and a material different from that of the main body in the grip portion of the shaft cylinder, the writing function, that is, the writing function, that is, non-slip against strong writing pressure, and long time In addition to the conventional technology that has the effect of reducing the fatigue level of fingers, shoulders, and arms even for writing, the combination with a transparent or colored transparent barrel body by providing a through hole in the grip portion In addition, the ink remaining in the ball pen refill can be seen through from the outside, and the tip of the barrel is formed with a smaller diameter to provide a cap fitting part to reduce the amount of ink remaining in the refill. It adds an action that can be seen almost to the end.

[0009]

Embodiments of the present invention will be described below in detail with reference to FIGS. 1 and 2.

The shaft cylinder 1 is made of a transparent or color-transparent plastic material, and a portion (grasping portion) 1a to be gripped at the time of writing is formed to have a diameter one step smaller than the thickness of the grip member 2 covered thereat. With one or several functional aspects,
A projecting portion 1b having a shape that takes the design into consideration is provided.

Further, at the tip of the grip portion 1a, a flange portion 1d is provided for protecting the end portion 2b of the grip member 2 to be covered and for receiving the impact of the opening end portion 5a of the cap 5 to be fitted. The cap fitting portion 1c is formed continuously with the outer diameter of the shaft cylinder 1 so as to be one step smaller than the outer diameter of the shaft cylinder 1, and the fixing portion (not shown) of the tip 3 is provided at the leading end and the tail plug 4 is provided at the rear end. Each fixing portion (not shown) is provided and is formed in a hollow cylindrical shape so that the ball pen refill R can be mounted.

It should be noted that, by design, the barrel 1 and the tip member 3 may be integrated, or the barrel 1 and the tail plug 4 may be integrated and the parts of the tip member 3 or the tail plug 4 may be omitted. Needless to say.

The grip member 2 is a soft material having elasticity, and the portion of the grip portion 1a that fits into the protruding portion 1b is provided with a through hole 2a.
As a cylinder or as a holding portion 1a of the shaft cylinder 1
It goes without saying that either one of them may be directly formed on the grip 1a, but it may be formed into a tubular shape and the grip 1a may be formed later.
In the case of covering the same, the shape of the through hole 2a that fits with the protruding portion 1b, the hardness of the grip member 2, etc. must be taken into consideration. Since there is a risk of high cost, it is advisable to integrally mold the molding die if equipment is available, although it will be expensive.

The material of the grip member 2 is a thermoplastic elastomer (styrene type, olefin type, ester type, nitrile type, urethane type, vinyl chloride type, etc.), nitrile rubber (NBR), natural rubber, silicone. It may be selected from rubber, urethane rubber, etc., but from the viewpoint of writing function, the hardness thereof is Hs (JIS A) 30 to 90.
The preferred range is that the shore hardness of 30 or less gives a slightly sticky feel, and the shore hardness of 90 or more causes a lack of soft feel. Type or nitrile type, and NBR or silicone rubber are also excellent in terms of moldability, touch to fingers and weather resistance.

After the cylindrical grip member 2 is coated on or integrally molded with the grip portion 1a of the barrel 1, ink is stored in the barrel 1 in an ink containing tube made of a transparent or translucent plastic material. When the ball pen refill R is loaded and the tip 3 is attached to the tip fixing portion and the tail plug 4 is attached to the rear end fixing portion, the writing end Rt of the ball pen refill R is exposed from the tip opening 3a of the tip 3. It serves as a ball pen shaft, and the cap 5 is fitted into the cap fitting portion 1c to form a completed ball pen.

[0016]

[Effect] Since the present invention uses the shaft cylinder as described above,
The amount of ink remaining in the lupen refill can be seen through the protruding part of the grip part as well as from the cap fitting part, and the impact of the abutting when the cap is fitted is received by the collar part. The grip member does not hurt the end portion, and since the projecting portion of the grip portion and the through hole of the grip member are fitted together, the grip member does not shift even under strong writing pressure or long-time writing. Also, since the surface of the grip member substantially coincides with the surface of the barrel and appropriate elasticity is transmitted to the fingers, a ballpoint pen capable of more comfortable writing can be obtained.

In the conventional example in which the tubular grip member is simply attached to the shaft cylinder of FIG. 3, there is an advantage that the grip member can be obtained easily and the attaching position can be changed appropriately, but on the contrary, strong writing pressure or In long-time writing, the gripping member's wobble was slightly felt on the fingers, and the merit and detriment such as impairing the sense of stability for writing were halfway, but the present invention further improved the intended effect of the conventional example. The things that have been done can be felt again.

[Brief description of the drawings]

FIG. 1 is a front view in which a part of a ball-point pen embodying the present invention is cut away.

FIG. 2 is an enlarged sectional view taken along the line AA of FIG.

FIG. 3 is a front view of a conventional example in which a grip portion is covered with a grip member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaft cylinder 1a Gripping part 1b Projection part 1c Cap fitting part 1d Collar part 2 Grip member 2a Through hole 2b End part 3 Tip tool 3a Tip opening part 4 Tail plug 5 Cap 5a Opening end part R Ball pen refill Ri ink Remaining amount Rt Brush end

Claims (2)

(57) [Claims] 1. A ball pen refill in which ink is stored in an ink containing tube made of a transparent or translucent plastic material is provided in a barrel, and a portion to be gripped at the time of writing, a so-called grip portion is a soft member having elasticity. In a covered or integrally formed ball-pen barrel, the barrel (1) made of a transparent or colored transparent plastic material has a grip portion (1a) formed one step smaller than the outer diameter of the barrel (1). Grasping a grip member (2) made of a soft material with color elasticity, in which one or several protrusions (1b) are provided, and through holes (2a) that fit into the protrusions (1b) are formed. The shaft tube (1) is covered or integrally molded with the part (1a), and the tip of the shaft tube (1) has a grip member.
A flange portion (1d) contacting the end face (2a) of (2) and a cap fitting portion (1c) connected to this and having a diameter one step smaller than the outer diameter of the shaft cylinder (1).
Is provided so that the remaining ink amount (Ri) of the ball pen refill (R) mounted in the barrel (1) can be seen through the protruding portion (1b) and the cap fitting portion (1c). A barrel of a ball-point pen, which is characterized in that 2. The hardness of the grip member 2 is Hs (JIS
A) The barrel of the ball-pen according to claim 1, which is 30 to 90.