JPH0517272Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a liquid writing instrument that uses relatively high viscosity ink in which pigments and the like are dispersed in a medium.

(Prior art and its problems) The applicant first arranged an ink relay core between a pen nib holder and a valve body, and then pressed the pen nib held in the nib holder to release the valve body. We have proposed a type of liquid writing instrument that is actuated to supply ink stored in the barrel to the pen tip, but as a result of pursuing high quality as a product, we discovered the following problems. Ta.

In other words, since this type of writing instrument uses relatively high viscosity ink made by dispersing pigments etc. in a medium, before writing, shake the writing instrument barrel vertically and horizontally to ensure that the ink in the ink storage chamber is sufficiently absorbed. It is necessary to stir it. However, if the pen nib holder and ink relay core are not firmly fixed, the vibration of the pen nib holder may cause it to slip out of the ink relay core, resulting in ink scattering or other problems. Even ink can pose a risk of harm to the human body. Therefore,
Although the two are fixed together, adhesion, which is a typical method of fixing, is not preferable because there is a risk that the adhesive will penetrate into the inside of the ink relay core and block the capillary tubes that lead to the ink flow path. Although caulking is a good idea, caulking also deforms the nib holder into an elliptical shape, and when it is actually placed inside the shaft, the pen nib holder may slide inside the shaft. The problem is that the nib holder and ink relay core become stuck together, causing problems such as not being able to supply enough ink to the nib, or even making it impossible to assemble the nib holder onto the shaft. While ensuring this, when the pen tip holder is placed within the shaft, it must always ensure smooth sliding within the shaft of the pen nib holder.

In addition, in order to supply ink to the pen tip, the pen tip is pressed to operate the valve body, but the pen tip holder and ink relay core may slide, and the amount of sliding is not regulated. In particular, the amount of ink discharged from the ink storage chamber cannot be stabilized, and there is a problem in that the ink discharged from the ink storage chamber unnecessarily leaks through the outer wall of the nib holder.

(Means for solving the problem) The present invention arranges an ink relay core between a metal pen nib holder and a valve body, and presses the pen nib held in the nib holder to generate a pen tip. A liquid writing instrument in which a valve body is actuated through integral sliding between a holder and an ink relay core to supply ink stored in a shaft to a pen tip,
An ink reservoir is provided in front of the valve body, a rear part of the ink relay core is located in the ink reservoir, and a reduced diameter part is formed at the rear of the nib holder,
By making the rear end of the reduced diameter part contact the front wall of the ink reservoir chamber, the sliding stroke of the pen nib holder, etc. is regulated, and the reduced diameter part is pressed and deformed. The gist of the present invention is to provide a liquid writing instrument which is provided with an inwardly protruding part and which fixes a front part of the ink relay core located in front of the ink reservoir chamber by the inwardly protruding part.

(Example) A detailed description will be given below based on the accompanying drawings.

Reference numeral 1 denotes an ink guiding core made of metal, resin, etc., which integrally has a curved portion 1a in order to provide a sliding force that easily bends due to writing pressure at the rear part of the ink guiding core. 1 is a small tube nib 3 made of a material with high wear resistance and corrosion resistance, which is protruded from the tip of a metal nib holder 2, and the tip slightly protrudes from the small tube nib 3, and is slid inside the nib holder 2 and the small tube nib 3. It is inserted loosely so that it can move.

The pen nib holder 2 has a reduced diameter part 2a at the rear thereof, and an inward protruding part 2b is formed on the reduced diameter part 2a by caulking at one or more points from the outside, and is made of nylon or polyester. , the front part 4 of the ink relay core 4 made of a fiber bundle such as acrylic, etc.
The inwardly protruding portion 2b is bitten into the portion a to securely fix it. Note that even if the pen nib holder 2 is deformed into an ellipse or the like due to the formation of the inwardly protruding part 2b, the change in the outer diameter caused by this deformation can be absorbed by the reduced diameter part 2a. The smooth sliding movement of the front shaft 5 on the front shaft 5 is fully guaranteed.

The rear part 4b of the ink relay wick 4 is located in an ink reservoir chamber 13 that accommodates a sponge or the like as required, and its rear end is connected to a valve rod 7 having a valve body 6. Here, the front wall 13a of the ink reservoir chamber 13
The opening does not prevent the ink relay core 4 from sliding, but is open so that the rear end of the reduced diameter portion 2a of the pen nib holder 2 can come into contact with it.

The valve body 6 is stretched between the valve body 6 and the receiving body 8, and is held against the valve seat 10 by an elastic body 9 having a resilient force stronger than the sliding force of the ink guiding core body 1. The ink relay core 4 and the pen nib holder 2 are pressed forward at all times and are slidably urged forward within the front shaft 5.

Reference numeral 11 is a rear shaft, and 12 is an ink storage chamber within the rear shaft 11.

When using this embodiment, when a pressing operation is performed with the writing tip facing downward, the ink guiding core 1 first slides and sinks into the small tube nib 3, and then the elastic body 9 When the pressure is continued against the elastic force of A gap is created between the pen and the seat 10, and the ink stored in the ink storage chamber 12 exits to the ink reservoir chamber 13 through the gap, and is supplied to the small tube nib 3 via the ink relay core 4. here,
The sliding stroke of the pen nib holder 2 and the like is regulated by the rear end of the reduced diameter part 2a of the nib holder 2 coming into contact with the front wall 13a of the ink reservoir chamber 13. The size of the gap created between the valve seat 10 and the valve seat 10 is also regulated to stabilize the ink supply amount. Also, small tube nib 3
When the pressure is released, the valve body 6 comes into pressure contact with the valve seat 10 again, and from then on, ink is always stably discharged from the tip of the small tube nib 3 due to the slight back and forth sliding movement of the ink guiding core 1. It becomes possible to write on the screen. Of course,
When writing, even if the writing instrument is shaken vertically and horizontally to stir the ink in the ink storage chamber 12, the pen nib holder 2 will not come out or shake. In addition, even if the ink from the ink storage chamber 12 leaks out from the ink storage chamber 13 through the ink relay core and the outer wall of the nib holder 2, such as when more ink accumulates in the ink storage chamber 13 than necessary, the pen tip The rear end of the reduced diameter part 2a of the holder 2 becomes a first bank, the inward protrusion 2b becomes a reservoir for ink beyond this, and the front end of the reduced diameter part 2a of the nib holder 2 still prevents further leakage. Since it becomes a second bank against the ink that is coming out, it is suppressed as much as possible.

In addition to using a small tube nib, the pen nib may be, for example, a pen nib made of resin with appropriate ink passages extending through it in the longitudinal direction.

(Effects of the invention) The liquid writing instrument of the present invention has an ink relay core placed between a metal nib holder and a valve body, and the pen nib is activated by pressing the nib held in the nib holder. In a liquid writing instrument in which a valve body is actuated through integral sliding between a holder and an ink relay core to supply ink stored in a shaft to a pen tip, an ink reservoir is provided in front of the valve body. A chamber is provided, and the rear part of the ink relay core is located in the ink reservoir chamber, and a reduced diameter part is formed at the rear part of the nib holder, and the rear end of the reduced diameter part is connected to the front wall of the ink reservoir chamber. In addition to regulating the sliding stroke of the pen nib holder, etc., the reduced diameter portion is provided with an inward protrusion that is deformed by pressure, and the ink relay is formed by the inward protrusion. Since the front part of the lead located in front of the ink reservoir chamber is fixed, the nib holder and ink relay lead can be securely attached, which not only eliminates the risk of use by general consumers. ,
As with conventional pen nib holders, due to deformation caused by caulking, etc., the nib holder may not slide properly, or it may become impossible to assemble the nib holder into the barrel of the writing instrument, resulting in product defects. Since it is possible to ensure that the ink relay core and valve body slide together with the pen nib holder without causing the rate to increase, it is also excellent from the viewpoint of production efficiency, and the valve body operation is improved. It is possible to reliably achieve this, stabilize quality, and improve yield.In addition,
Since unnecessary leakage of ink through the outer wall of the nib holder can be suppressed as much as possible, staining of handwriting and hands can be sufficiently suppressed.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a vertical cross-sectional view of essential parts of a liquid writing instrument, Fig. 2 is a perspective view of the nib holder in Fig. 1, and Fig. 3 is a cross-sectional view of the pen nib holder in Fig. 2. It is a sectional view taken along the line A-A. 1... Core for ink guidance, 1a... Curved part,
2...Pen tip holder, 2a...Reduced diameter part, 2b...
...Inward protrusion, 3... Pen tip, 4... Ink relay core, 4a... Front, 4b... Rear, 5... Front shaft, 6... Valve body, 7... Valve rod, 8 ...receptor, 9
... Elastic body, 10 ... Valve seat, 11 ... Rear shaft, 12
...Ink storage chamber, 13 ...Ink reservoir chamber, 13
a... Front wall.

Claims (1)

[Scope of utility model registration request] An ink relay core is placed between a metal pen nib holder and a valve body, and by pressing the pen nib held in the nib holder, the pen nib holder and ink relay core slide integrally. In this liquid writing instrument, an ink reservoir is provided in front of the valve body, and the ink relay core is connected to the ink reservoir chamber in front of the valve body. Further, by forming a reduced diameter portion at the rear of the nib holder, and making the rear end of the reduced diameter portion contact the front wall of the ink reservoir chamber, the pen In addition to regulating the sliding stroke of the tip holder, the reduced diameter portion is provided with an inward protrusion that is deformed by pressure, and the ink relay core is located in front of the ink reservoir chamber by the inward protrusion. A liquid writing instrument that can be fixed.