JPH0443345Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to an improvement of a writing implement for water-based ink.

(Prior art and its problems) Conventional ballpoint pens using water-based ink or fixed pens with a fixed lead seal the pen tip with a cap to prevent ink leakage. It has drawbacks such as being troublesome to work with.

(Means for solving the problem) The present invention automatically seals the pen tip at the same time as the pen tip is inserted into the base or barrel of the ballpoint pen, etc. that uses conventional water-based ink, without having to put a cap on it. This is to prevent water-based ink from leaking, drying, etc.

To describe the present invention in detail with reference to the illustrated embodiment, a ballpoint pen refill 3 containing water-based ink is loaded into a barrel 2 with a cap 1 screwed onto the tip, and the pen tip 3' of the ballpoint refill 3 is loaded. In a ballpoint pen 5 which can be freely taken out and retracted from the base 1 by an arbitrary feeding mechanism 4 such as a knock type, a bending type, or a rotary type, a seal ring 6 is provided at one end between the ballpoint pen reheel 3 and the barrel 2. , a sealed envelope 8 with a sealing body 7 tightly attached to the other end is arranged and fixed to the inner wall of the shaft cylinder 2, a sealing ring 6 is closely slidably attached to the outer periphery of the ballpoint pen reheel 3, and the sealing body 7 consists of a sealed body 9 made of resin or the like and permanent magnets 10, 10, the sealed body 9 has an insertion opening 11 in the center, and side walls 12 have recesses 13, 13 provided opposite to each other. The permanent magnets 10, 10 are disposed opposite each other in the recesses 13, 13 so that the same poles thereof face each other. Further, the sealing body 7 is disposed at a position surrounding the pen tip 3' when the pen is retracted, or at a position in front of the pen tip 3'. Between the sealing body 7 and the cap 1, a steel ball 14 which is closely and magnetically attached to the tip of the insertion hole 11 is rotatably provided.

The distal end surface 9' of the seal body 9 may be a conical surface that retracts inward so that the sphere 14 can easily roll toward the center of the seal body 7.

In the figure, 15 is a spring, and 16 is a sealing body 7 of the sealed envelope 8.
The arrangement position of the sealing body 7 is regulated by the flange body disposed inside. The secret envelope 8 is made of steel,
Sealed envelope 8 and base 1 where permanent magnets 10 and 10 are attached
Alternatively, a gap 17 is provided between the shaft cylinder 2 and the magnetic force to be prevented from leaking to the outside as much as possible.

In addition, although the example mainly described a ballpoint pen,
The same is true for fixed writing instruments with a fixed lead.

(Function) The present invention is realized as described above, and in order to use it, the nib 3 of the ballpoint pen reheal 3 protrudes from the base 1 as shown in Fig. 1, but at this time The sphere 14 is attached to a permanent magnet 10 on the tip surface 9' of the sealing body 7 surrounding the ballpoint pen refill 3.
Or it is magnetically attached by 10. When the ballpoint pen reheal 3 is pulled into the base 1 by operating the feeding mechanism 4, the pen tip 3' is located in the middle or behind the sealing body 7, and the sphere 14 is attracted by the permanent magnets 10, 10, The insertion port 11 is sealed.

If the sealing effect of the insertion hole 11 is poor, it is advisable to apply a seal 18 such as an O-ring or magnetic oil to the inner edge of the tip of the insertion hole 11 as shown in FIG.

(Effects) As mentioned above, the present invention is to load a sealed envelope having a seal ring at one end and a sealing body at the other end between the re-heal and the shaft cylinder, and the seal ring is slidably and closely attached to the outer periphery of the re-heal. The sealing body is arranged oppositely on the side wall of the sealing body body so that the same poles of the permanent magnets face each other, and is placed at a position surrounding or at the tip of the pen tip when the pen is immersed, and is located between the sealing body and the base. Since the ball is rotatably attached to the tip of the insertion opening of the sealing body, it is possible to freely roll the reheal into the shaft cylinder using the feeding mechanism. It can instantly move in the direction of the insertion opening to automatically seal the insertion opening and seal the pen tip inside the sealed envelope.
Air circulation is blocked inside the pen, eliminating ink leakage from the pen tip 3', and at the same time, the ink does not decrease due to drying, allowing smooth writing at all times. Also, since there is no capping, etc., handling is easy.

Further, since the permanent magnet can be a general bar magnet or plate magnet, it can be made at low cost and can be easily assembled into the side wall of the sealing body body.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the ballpoint pen of the present invention, Figure 2 is a cross-sectional view of the ballpoint pen when not in use, Figure 3 is an enlarged view of the main parts of the ballpoint pen of the present invention, and Figure 4 is a cross-sectional view taken along the - line in Figure 3. be. 1 is a cap, 2 is a barrel, 3 is a ballpoint pen refill, 4 is a feeding mechanism, 5 is a ballpoint pen, 6 is a seal ring, 7 is a sealing body, 8 is a sealed envelope, 9 is a sealing body body, 10, 10 are permanent Magnet, 11 is insertion port, 12
is the side wall.

Claims (1)

[Scope of utility model registration request] A writing instrument in which a reheal containing water-based ink is loaded into a barrel having a cap at the tip, and the nib of the reheal can be freely retracted and retracted by a feeding mechanism,
A sealed envelope having a seal ring at one end and a sealing body at the other end is loaded between the reheal and the barrel, the seal ring is slidably in close contact with the outer periphery of the reheal, and the seal is attached to the body of the sealing body. The permanent magnets are arranged oppositely on the side walls so that the same polarity faces each other, and are placed in a position surrounding or in front of the pen tip when the pen is immersed, and the sealing body is inserted between the sealing body and the cap. A water-based ink writing instrument with a freely rolling sphere that magnetically attaches closely to the tip of the mouth.