JPH0617574Y2 - Writing instrument cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is a cartridge for a writing instrument, which is housed in the writing instrument body in a replaceable manner and has a pen tip attached to a barrel protruding from the tip of the writing instrument body. Regarding

(Prior Art) Conventionally, the following is known as a connection between a barrel of a writing instrument cartridge and a pen tip.

Attaching the pen tip directly to the metal shaft barrel Attaching the metal joint member to the metal shaft barrel and attaching the pen tip to this joint member Attaching the resin joint member to the metal shaft barrel Attaching the pen tip to the joint member Attaching the pen tip directly to the resin shaft barrel Attaching the resin joint member to the resin shaft barrel and attaching the pen tip to this joint member In the writing instrument cartridge including the above, since the metal is used for both the pen tip connection portion of the barrel and the barrel and the joint member, the cost increases. In the writing instrument cartridge consisting of, and, since the portion to which the pen tip is attached is made of resin, it becomes thick, and the outer circumference of this portion becomes large, and when used in a writing instrument having a tip, the pen tip is inside the tip. However, there is a problem that it is difficult to accommodate the part to be mounted. For this reason,
If the wall thickness of the part to which the pen tip is attached is reduced, swelling may occur when the pen tip is pressed into the joint, and the pen tip may not come out from the hole provided at the tip of the tip metal, or ink may leak due to ink penetration. Furthermore, if the dimensional difference of the mounting portion of the pen tip is made small, there arises a problem that the pen tip comes off with time or a slight impact.

(Means for Solving the Problems) That is, the present invention comprises a resin-made barrel, a pen tip, and a metal joint member connecting the barrel and the pen tip,
A writing instrument cartridge characterized in that the joint member is press-fitted and fixed to the tip of the barrel to be interposed between the barrel and the pen tip so that there is a space between the barrel and the pen tip. It is a summary.

(Example) Hereinafter, the present invention will be described with reference to the drawings.

1 and 2 show an embodiment of a writing instrument cartridge according to the present invention, in which reference numeral 1 is a resin barrel. A metal joint member 2 is attached to the tip of the barrel 1.
Is press-fitted, and the pen tip 3 is attached to the tip of the joint member 2.
Has been press-fitted.

In FIG. 1, an ink occlusion body 4 is housed inside a barrel 1, and an ink guide core 5 for guiding the ink from the ink occlusion body 4 to the pen tip 3 is arranged. Also, the second
In the figure, a pipe 6 containing ink is mounted inside the barrel 1 from the rear end of the pen tip 3 toward the barrel.

In both FIG. 1 and FIG. 2, in order to prevent the evaporation of the ink solvent, a tail plug is attached to the rear of the cartridge either integrally with the barrel or separately.

If a problem such as the ejection of the ink due to the pressure difference between the inside and the outside of the refill occurs, an air hole may be provided at an appropriate position of the cartridge. In addition, in Examples 1 and 2, the nib having a ball is used, but a nib made of resin, a nib of a fiber bundle, a nib of a metal pipe, a nib made of ceramic, etc. can be appropriately used. Is.

Further, it can be used for other than the ink storage material, for example, raw ink type.

Further, as the mechanism of the main body for accommodating the cartridge, it is possible to use an appropriate mechanism such as a cartridge fixing method or a cartridge feeding method by knocking and rotating.

(Effects of the Invention) As described above, the writing instrument cartridge of the present invention comprises a resin-made barrel, a pen tip, and a metal joint member connecting the barrel and the pen tip. Since the member is press-fitted and fixed to the tip of the barrel and is interposed between the barrel and the pen tip, and there is a gap between the barrel and the pen tip, the cost is low and the pen tip is This prevents the ink from leaking from the joint between the joint member and the pen tip or the joint between the joint member and the barrel as much as possible without causing blistering due to press fitting.

[Brief description of drawings]

 FIG. 1 is a partial vertical sectional view of an embodiment of the present invention, and FIG. 2 is a partial vertical sectional view of another embodiment. 1 ... Shaft cylinder, 2 ... Joint member, 3 ... Pen tip

Claims (1)

[Scope of utility model registration request] 1. A shaft cylinder made of a resin, a pen tip, and a metal joint member connecting the shaft cylinder and the pen tip. The joint member is press-fitted and fixed to the tip of the shaft cylinder. And a pen tip, and a space is provided between the barrel and the pen tip.