JPH0221268Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a tail plug for an ink-absorbing writing instrument such as a felt-tip pen or a marking pen, which is constructed by wrapping an ink-absorbing batting in an outer skin.

In conventional writing instruments, the tip of the tail plug is generally parallel to the rear end of the ink absorber, and the structure is such that the ink absorber is held in surface contact with the ink absorber. , It is easy for variations to occur over the entire length of the tip shaft, tail plug, etc. due to processing and assembly, so in these structures, if the total length of the batting is shorter than the total length of the batting storage section, the batting will be If it begins to wobble and make insufficient contact with the pen core, the writing function will deteriorate.On the other hand, if the overall length of the filling becomes too long, the tail plug will be pushed by the repulsive force of the filling and the writing instrument will be pulled out. There was a drawback that a gap was created between the device and the main body, causing problems such as poor assembly.

The present invention relates to a writing instrument such as a felt-tip pen having an ink absorbing body as described above, in which the tip surface of the tail plug body that comes into contact with the end surface of the ink absorbing body is formed in a specific slope shape as described above, and the filling material or the like is The purpose of this invention is to improve the quality of the product by absorbing variations in the length of the parts and eliminating the above-mentioned drawbacks.

The illustrated embodiment is a hollow cylindrical body with a flange 1 and locking protrusions 2, 2' around its outer surface, and a distal end surface 3 of an ink absorbing body 6 formed by wrapping an ink absorbing batting 8 with an outer skin 7. The ink storage body 6 is compressed in the radial direction by pressing the outer surface of one of the ends, and the ink storage body 6 is
This figure shows a tail plug body 4 formed in an inclined shape so that the ink storage body 6 can be held in the same area by pressing the tail plug body 4 into pressure contact with one inner surface of the writing instrument body 5, and it can be assembled into the writing instrument body 5. In this case, the tip surface 3 presses one outer surface of the rear end of the ink absorber 6 to compress the ink absorber 6 in the radial direction, and also presses against one inner surface of the writing instrument main body 5 to compress the ink absorber 6. will be retained.

In this case, the ink storage body 6 is covered with a skin 7 on its outer circumferential surface, and has a high resistance to deformation in the axial direction, but not so much resistance to deformation in the radial direction. Since the component force in the axial direction becomes smaller as it acts in a direction at a certain angle, the force does not become larger than the fitting force between the tail plug 4 and the writing instrument body 5, and the pull-out or loosening of the tail plug 4 is prevented. That will happen.

As mentioned above, in a writing instrument such as a felt-tip pen that has an ink absorber, the tip surface of the tail plug body that comes into contact with the end surface of the ink absorber is pressed against one outer surface of the rear end of the ink absorber. By compressing the ink absorbing body in the radial direction and forming the ink absorbing body in an inclined shape so that the ink absorbing body can be pressed against one inner surface of the writing instrument body and held in the same part, Since the repulsive force from the ink absorber can be weakened without reducing the retention force of the ink absorber by the tail plug, even if there is some variation in parts such as the batting, it can be absorbed and the batting will become rattled. It has the effect of eliminating the problem of tail plugs coming out and loosening, and improving product quality.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention.
The figure is a perspective view of the tail plug main body, and FIG. 2 is a partial longitudinal cross-sectional view of the tail plug in a state where it is assembled into a writing instrument. 1... Flange portion, 2, 2'... Locking protrusion, 3... Tip surface, 4... Tail plug body, 5... Writing instrument body, 6...
... Ink absorbing body, 7 ... Outer skin, 8 ... Filling.

Claims (1)

[Scope of utility model registration request] In a writing instrument such as a felt-tip pen that has an ink absorber, the tip surface of the tail plug body that contacts the end surface of the ink absorber is pressed against one outer surface of the rear end of the ink absorber to move the ink absorber in the radial direction. 1. A tail plug for a writing instrument, characterized in that it is formed in an inclined shape so that the ink absorbing body can be compressed and held in one inner surface of a writing instrument body by pressing the ink absorbing body against the inner surface of one side of the writing instrument main body.