JPH0616796Y2 - Writing instrument - Google Patents

Description

TECHNICAL FIELD The present invention relates to a writing instrument in which a support member for an occlusion body is interposed between a rear end of an ink occlusion body housed in a barrel and a bottom face of the barrel.

2. Description of the Related Art A conventional writing instrument that is assembled by interposing an ink occlusion body supporting member is disclosed in Japanese Utility Model Publication No. 42-17638.

Problems to be Solved by the Invention The ink absorber support device in the conventional writing instrument is
The claw pieces are projected on three sides, and the absorbent material is sandwiched by a sandwiching tool having a bent portion at the tip according to the outer circumference of the absorbent material.When the sandwiching tool is inserted into the ink containing tube, The diameter must be reduced, and when inserting the absorbing material into the ink storage tube, assembly problems such as the ink absorbing material getting caught in the bent parts tend to occur, and there were problems such as poor assembly efficiency. .

The present invention solves the above problems and prevents the ink storage member from moving due to impact or the like in a writing instrument in which a support member is interposed at the rear end portion of the ink storage member, and also has a smooth air exchange function, which improves the assembly efficiency. It is intended to provide excellent writing instruments.

Means for Solving the Problems The writing instrument 1 according to the present invention is a writing instrument in which a supporting member for the occlusion body is interposed between the rear end of the ink occlusion body housed in the barrel and the bottom surface of the barrel. The member 2 is provided with a base portion 21 having an outer diameter slightly smaller than the inner diameter of the opening of the shaft tube 3, and at least three axially arranged portions at a peripheral portion of one end portion of the base portion 21 in the axial direction, and at the end portion. It is an integrally molded plastic member formed of a peripheral edge piece 221 having elasticity in the radial direction, which is formed in a shape that expands in the opposite radial direction. Each end of the peripheral edge piece 221 has a side wall surface of the barrel 3. It is required that the ink storage member 4 is assembled by being pressed into contact with the rear end surface of the ink storage member 4.

In the above, the base 21 on which the peripheral piece 221 is arranged
One shaft center piece 222 is arranged at the shaft center part of one end of
A combination in which the shaft piece 222 is larger than the length of the peripheral piece 221 is also effective.

Further, a combination in which adjacent peripheral edge pieces 221 are integrally connected to each other by a connection piece 223, or a combination in which the axial center piece 222 and each peripheral edge piece 221 are integrally connected by a connection piece 223 is also effective. .

It is effective that the connecting piece 223 is flexible and has a strip shape or a string shape that is thinner than the peripheral edge piece 221 and the shaft center piece 222.

The ink occlusion body support member 2 is integrally formed by injection molding with a thermoplastic resin such as polypropylene, polyethylene, polyacetal, nylon, or polycarbonate.

Operation When the ink occlusion body support member 2 is inserted into the shaft cylinder 3 from the base portion 21, the outer peripheral piece 221 is housed in the shaft cylinder 3 while the circumscribed circle diameter of the end face is gradually reduced. The peripheral edge piece 221 is pressed against the inner wall of the barrel 2 and held in the barrel 3 because of its springiness. In addition, in the system in which the ink occlusion body 4 is supported by the end faces of the peripheral edge piece 221 and the axial center piece 222, and the axial center piece 222 is slightly larger than the length of the peripheral edge piece 221, the lateral movement of the ink occlusion body 4 is prevented. Become.
Further, between the adjacent peripheral pieces 221 or each peripheral piece 22.
In the system in which the connecting piece 223 is integrally provided between the shaft 1 and the shaft piece 222, each peripheral piece 221 is prevented from expanding more than necessary and falling apart, and the supporting member 2 is attached to the shaft tube. Since the connection piece 223 has a restoring property when it is inserted into
The support member 2 is securely pressed and fixed in the barrel 3. In addition, an air exchange space is formed between the support member 2 and the bottom surface of the ink occlusion body 4, so that troubles such as excessive outflow or excessive outflow of ink are prevented and stable writing performance is provided.

Example 1 (see FIG. 2) Diameter 3 mmφ, length 19 from the center of the bottom of a bottomed cylindrical base portion 21 having an outer diameter of 10 mmφ, an inner diameter of 7 mmφ, a depth of 12 mm and a length of 13 mm.
A mm axial piece 222 is provided. Eight wedge-shaped peripheral pieces 221 having a length of 18 mm are provided so as to surround the shaft center piece 222 from the peripheral portion on the bottom side of the base portion 21,
The outer diameter circle on the base side of the peripheral edge piece 221 is 10 mmφ, the inscribed circle diameter is 8 mmφ, the end outer connection circle diameter is 16 mmφ, and the inscribed circle diameter is 9 mmφ. Molded by molding.

When the support member 2 is inserted into the aluminum can barrel 3 having an opening inner diameter of 11 mmφ, the peripheral piece 221 bends in the inner diameter direction at the mouth of the barrel 3 and the circumscribed diameter of the end portion becomes small, and the supporting member 2 is inserted into the barrel 3. At the same time, since the peripheral piece 221 has a radial elasticity, the support member 2 is pressed against the inner surface of the barrel 3. After inserting the ink occlusion body 4 into the shaft cylinder 2, the ink is impregnated,
The neck cylinder 6 having the pen body 5 attached thereto was screwed to the shaft cylinder 3 to obtain the writing instrument 1.

Example 2 (see FIG. 3) 0.3 m thickness provided 10 mm from the end face of the peripheral piece 221
The peripheral edge pieces 221 are connected by a connection piece 223 having an m and a width of 1.8 mm. Other configurations are similar to those of the first embodiment.

Third Embodiment (see FIG. 4) Each peripheral edge piece 221 is connected to the shaft center piece 222 by a connecting piece 223.

Effect Since the ink occlusion body support member 2 is provided with the peripheral edge pieces 221 having elasticity in the radial direction at appropriate intervals at the peripheral edge of the one end of the base portion 21, the ink occlusion body support member 2 has the shaft cylinder 3
Is fixed by pressure to the ink absorber 4 and
It is supported by the end faces. Further, in a system in which the shaft piece 222 provided on the shaft portion is longer than the length of the peripheral piece 221 provided on the peripheral portion, lateral shake of the ink occlusion body 4 is prevented. Further, in a system in which the connection piece 223 is integrally provided between the adjacent peripheral edge pieces 221 or between the peripheral edge pieces 221 and the axial center piece 222, the peripheral edge pieces 221 are expanded more than necessary. Prevents disassembly and improves assembly efficiency.
Moreover, when the support member 2 is inserted into the barrel 3, the connecting piece 223
Has a restoring property, the support member 2 is securely fixed in the barrel 3 by pressure. In addition, since the air replacement space is formed between the support member 2 and the bottom surface of the ink occlusion body 4, the air replacement to the ink occlusion body 4 is smoothly performed, and ink drops from the pen tip 5 and blurs of handwriting. Satisfies its practicality as a writing instrument that does not cause such problems.

[Brief description of drawings]

The drawings show an embodiment of the writing instrument of the present invention. Fig. 1 is a longitudinal sectional view of a main part of the writing instrument of the present invention, Fig. 2 is a perspective view of an ink occlusion body supporting member, and Figs. 3 and 4 are ink occlusion body support. It is a perspective view of other examples of a member. 1 ... Writing implement 2 ... Ink absorber support member 21 ... Base 221 ... Peripheral piece 222 ... Shaft core piece 223 ... Connection piece 3 ... Shaft cylinder 4 ... Ink absorber 5 ... Pen body 6 ... ... neck tube

Claims (4)

[Scope of utility model registration request] 1. A writing instrument in which a support member for the absorbing member is interposed between the rear end of the ink absorbing member housed in the barrel and the bottom surface of the barrel, and the supporting member 2 is provided at the opening of the barrel 3. A base portion 21 having an outer diameter slightly smaller than the inner diameter, and at least three axially-arranged base portions 21 are provided at appropriate intervals on a peripheral portion of one end portion of the base portion 21,
A plastic integrally-molded member formed of a peripheral edge piece 221 that is radially expanded toward the distal end portion and has elasticity in the radial direction. Each edge portion of the peripheral edge piece 221 is a cylindrical barrel. 3 A writing instrument 1 assembled by being pressed against the side wall surface and in contact with the rear end surface of the ink occlusion body 4. 2. The writing instrument 1 according to claim 1, wherein one axial center piece 222 is disposed at an axial center portion of one end of the base portion 21 on which the peripheral edge piece 221 is disposed. 3. The writing instrument 1 according to claim 2, wherein the axial center piece 222 is longer than the length of the peripheral edge piece 221. 4. A utility model registration claim in which a connecting piece 223 is integrally provided between adjacent peripheral edge pieces 221 or between each peripheral edge piece 221 and an axial center piece 222. Writing instrument 1 according to item 3.