JP2002240477A - Suction-type fountain pen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction-type fountain pen which shows high ink suction efficiency and the ability to suck ink stored in an ink bottle or the like upto the last drop of ink during sucking of the ink and is free from the smearing of the neck part or the like of a pen barrel in an ink sucking operation. SOLUTION: An ink tank barrel which slides without rotating is provided in the pen barrel. Further, an ink suction pipe is fitted to the tip of the ink tank barrel and the rear end of the ink tank barrel and a tail crown arranged in a freely rotating and sliding manner at the rear end of the pen barrel are connected together in a row by thread fitting. In addition, a rotating piece which slides under an interlocking action is connected to the rear end of the ink tank barrel in a row. A means for connecting the tail crown to the rotating piece in a row when the tail crown is fed to the rear side of the pen barrel, is provided at the tail crown and the rotating piece. A suction rod with a valve part for evacuating air from the ink tank barrel and sucking the ink is arranged by thread fitting inside the rotating piece.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fountain pen of a type in which an ink suction pipe for sucking ink when sucking ink is drawn out near the tip of a pen to suck ink.

[0002]

2. Description of the Related Art Conventionally, a so-called "snorkel type" fountain pen having a structure in which an ink suction pipe for sucking ink is drawn out near the tip of a pen by rotating a tail crown during ink suction. Is known. The suction operation of such a fountain pen will be briefly described with reference to the drawings. As shown in FIG. 9, a snorkel-type suction fountain pen 51 includes a rubber tube 53 for containing ink in a shaft cylinder 52. An internal sliding body 54 is slidably disposed without rotating with respect to the shaft cylinder 52. In front of the sliding body 54, the ink suction pipe 55 Yes continuously connected, it is inserted the ink suction pipe 55 into the pen core 60 mounted on the neck portion 64 of the distal end of the barrel 52. In the ink suction pipe 55, an inner core 56 that holds the ink and forms a path for introducing and discharging the ink is inserted. A tail crown 57 is disposed at the rear end of the barrel 52 so as to be rotatable and slidable. The 該尾 crown 57, a rotary top 58
Are rotatably and slidably connected to the tail crown 57, and the rotating piece 58 and the sliding body 54 are screw-fitted 59.

As shown in FIG. 10, when the tail crown 57 is rotated, the rotating piece 58 connected to the tail crown 57 is also rotated, and the sliding body 54 with the screw fitting 59 is advanced, and the tip end of the pen core 60 is moved. , The ink suction pipe 55 is fed out, and the tip of the ink suction pipe 55 is located near the tip of the pen 61. Next, as shown in FIG. 11, the tail crown 57 is rotated to release the screw fitting 59 with the sliding body 54, the tail crown 57 is pulled out from the rear end of the barrel 52, and the tail crown 57 is pivoted. When the cylinder 52 is pushed into the cylinder 52, the interior of the barrel 52 is kept airtight by airtight means (hermetic packing) 62. As shown in FIG. The rubber tube 53 connected to the rear end of the suction pipe 55 is crushed by air pressure. Further pushing the tail cap 57 into barrel 52,
As shown in FIG. 13, the airtight means 62 is located at the airtightness adjusting section 63 formed on the rotating top 58, and the air pressure in the shaft cylinder 52 escapes and the rubber tube 53 is restored. At that time, the ink is sucked into the rubber tube 53. Although not shown, after the ink has been sucked, the tail crown 57 is pushed back to its original state, and the tail crown 57 is rotated in the opposite direction to the front, so that the ink suction pipe 55 is housed in the pen core 60 and Return to the state.

Conventionally, by rotating a tail crown rotatably disposed at the rear end of a barrel, a piston connected to the tail crown slides in the ink tank cylinder with rotation of the tail crown, and ink is removed. A so-called "rotary" inhalable fountain pen accommodated in an ink tank cylinder is well known.

[0005]

In the former "snorkel-type" inhalation type fountain pen, the ink tank cylinder is a rubber tube, and the rubber tube is not used in order to suck ink by the restoring force of the rubber tube. There is a problem that the ink suction efficiency is lower than that of a rotary type structure and the like, and that the rubber deteriorates due to aging and the ink suction efficiency further decreases. The latter in inhalation fountain "rotary" in order to suction the ink to inhale with a pen and the pen core in the ink, the ink must have a certain degree of depth contained in the ink bottle, and the like. In other words, there is a problem that the ink in the ink bottle or the like cannot be completely sucked. Further, in order to inhale the ink, the pen must be immersed deeply in the ink, and there is a problem that not only the pen but also the tip of the neck may be stained with the ink.

The advantage of the "snorkel-type" inhalation fountain pen is that it does not mean that the pen is not stained with ink at all during ink inhalation as compared with the "rotary-type" inhalation-type fountain pen. Is that the rate of soiling the neck etc. is small. In view of these facts, the present inventor has proposed an ink suction pipe having a “rotary” ink suction structure, which is provided with an ink suction pipe for sucking ink to be drawn out when ink is sucked. It has the advantages of each other's structure as described above, has good ink suction efficiency, can suck ink stored in an ink bottle etc. to the end, and inks the pen and the neck of the barrel at the time of ink suction. A fountain pen that can be inhaled without getting dirty.

[0007]

In order to achieve the above object, an inhalable fountain pen according to the present invention is provided such that an ink tank cylinder is slidably disposed in a shaft cylinder without rotating the ink tank cylinder. The ink suction pipe is attached with the tip part housed in the pen core attached to the barrel, and the tail cap that is rotatably and slidably mounted on the rear end of the barrel is screwed into the rear end of the ink tank barrel. The rotating top is connected slidably in conjunction with the ink tank cylinder, and when the tail crown is extended backward, the tail crown and the rotating top engage and the engaging means is connected. A suction rod, which is provided on the crown and rotating top and has a valve section for discharging air from the ink tank cylinder and sucking ink inside the rotating top, is arranged by screw fitting. The tank cylinder moves forward and the tip of the ink suction pipe protrudes from the pen core, When the ink barrel stops moving forward, the tail crown is extended backward, the connection between the tail crown and the ink tank cylinder is released, and the tail crown and the rotating top are connected by the engagement means, and the rotating top is rotated as the tail crown rotates. By rotating, the suction rod moves forward in the ink tank cylinder by the rotation of the rotating top and exhausts the air in the ink tank cylinder, and by rotating the tail crown in reverse, the rotating top reversely rotates and the suction rod moves backward. It is characterized in that ink is sucked into an ink tank cylinder.

In the present invention, in order to improve the operability, the ink tank cylinder is advanced by rotating the tail crown and the tip of the ink suction pipe is projected from the pen core, but the ink tank cylinder is advanced more reliably. For this purpose, it is preferable to urge the ink tank cylinder toward the tip end of the shaft cylinder with a coil spring. When the forward movement of the ink tank cylinder stops, the tail crown is extended to the rear side of the shaft cylinder.However, the screw fitting between the tail crown and the ink tank cylinder is released, and the connection between the ink tank cylinder and the tail cap is released. In order to improve the performance, it is preferable to urge the tail crown to the rear side of the barrel using a coil spring.

In the present invention, for example, the tail cap is connected to the rear end of the ink tank cylinder by screw fitting. The connection means that the tail cap and the rear end of the ink tank cylinder are directly connected by screw fitting. Alternatively, it means that another member may be fixed to the tail crown, and the other member and the rear end of the ink tank cylinder may be connected by screw fitting. When the tail crown is extended to the rear side of the barrel, as the engagement means that the tail crown and the rotating top are connected, a concave or convex part is provided on the tail crown or a member connected to the tail crown, and the rotating top is provided with provided projections or recesses to engage with the engaging means,
In some cases, the concave portion and the convex portion are engaged.

A valve provided at the tip of the suction rod for discharging air from the ink tank cylinder and sucking ink is slidable in close contact with the inner wall surface of the ink tank cylinder, but its shape is appropriately determined. The shape and structure should not be particularly limited as long as the ink does not flow out behind the valve portion. The material of the valve portion, rubber, Teflon (registered trademark), fluorine-based resin other than Teflon, polyethylene resin, polypropylene, polyacetal, nylon or the like can be used.

Further, in the present invention, an ink suction pipe is attached to the tip of the ink tank tube to the ink tank tube, but it is important to prevent the ink and air from leaking.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the inhalable fountain pen of the present invention will be described with reference to the drawings. In the inhalable fountain pen of the present embodiment, the structure of the cap is a conventionally known general structure, and the description of the cap is omitted, but the inhalable fountain pen of the present invention does not have a cap. It is not limited to the structure.

In the inhalable fountain pen 1 of the present embodiment shown in FIGS. 1 to 8, a neck 4 is screwed to a tip end of a body 2 of a barrel via a connecting body 3. Mounting hole 5 provided at the end of connecting body 3
Further, a pen core 8 having a pen 6 and a comb groove 7 for temporarily storing ink is mounted. A communication hole 9 having a small diameter is provided behind the mounting hole 5, and an ink tank cylinder 10 for storing ink is slidably disposed in the body 2 behind the communication hole 9.

As shown in FIG. 2, eight protrusions projecting outward at equal intervals circumferentially and extending along the axial direction are formed on the outer peripheral surface of the tip of the ink tank cylinder 10 on the pen 6 side. A groove 11 formed in the connecting body 3
, So that the ink tank cylinder 10 can slide without rotating with respect to the connecting body 3 and the body 2. An outwardly protruding flange 13 is formed at the rear end of the protruding portion 11 of the ink tank cylinder 10, and the flange 13 is attached to the inner wall surface of the body 2 as the ink tank cylinder 10 slides. A large-diameter space portion 14 is provided inside the body portion 2 so as not to abut.
The rear step 15 and the flange 1 constituting the large diameter space 14
3, a first coil spring 16 is disposed to urge the ink tank cylinder 10 forward.

An ink suction pipe 18 is connected to the tip of the ink tank cylinder 10 by a sealing member 19 so that ink and air do not leak out, and can slide in conjunction with the ink tank cylinder 10. The tip of the ink suction pipe 18 is inserted into a through hole 17 formed in the center of the pen core 8. Further, in the mounting hole 5 in which the pen 6 and the like are mounted, a packing 20 that is in close contact with the outer peripheral surface of the ink suction pipe 18 is provided so as to be sandwiched between the rear end of the pen core 8 and the wall surface 9 a that forms the communication hole 9. The ink is prevented from flowing back from the pen core 8 to the body 2. Inside the ink suction pipe 18, an inner core 21 that holds ink and has an ink groove (not shown) serving as a path for introducing and discharging ink is inserted.

At the rear end of the body 2, a tail crown 22 is disposed rotatably and slidably. As shown in FIG. 3, a first crown body 23 that rotates and slides along with rotation and sliding of the tail crown 22 is fixed to the tail crown 22.
3 includes a tail cap second cylindrical body 24 and a concave groove 25 of an engaging means having an uneven shape.
The engaged member 25 having a is fixed. As the tail crown 22 rotates and slides, the tail crown second cylindrical body 24 and the engaged member 25 also rotate and slide in conjunction with each other. Tail crown second cylinder 24
Is connected to the rear end of the ink tank cylinder 10 by screw fitting 26.

At the rear end of the ink tank cylinder 10,
The rotating top 28 is slidable in conjunction with the sliding movement of the ink tank cylinder 10 by the concave and convex engaging means 27. As shown in FIG. 7, an engaging member 29 having a convex portion 29 a that engages with the concave groove 25 a of the engaged member 25 is fixed to the rear end of the rotating top 28. When the screw fitting 26 between the two cylinder 24 and the ink tank cylinder 10 is disengaged and the tail crown 22 projects rearward from the rear end of the body 2,
5 and the engaging member 29 is as engageable. Rotation piece 28
A valve portion 30 formed of a rubber for sliding inside the ink tank cylinder 10 to discharge air and suck ink.
A suction rod 31 provided at the tip is provided.
Reference numeral 1 denotes a screw which is screw-fitted 32 with the rotary top 28 so as to be slidable against the rotation of the rotary top 28.

The second cylindrical body 24 of the tail crown is provided with a flange 33 projecting outward, and a second coil spring 34 is disposed between the flange 33 and the rear end of the ink tank cylinder 10. When the screw fitting 26 between the tail cap second cylinder 24 and the ink tank cylinder 10 is disengaged, the tail cap 22 is urged rearward. The front end of the tail cap 22 Yes to ring 35 is mounted,
A trunk ring body 36 is mounted on the rear end of the trunk 2.

Next, the suction operation when the ink is sucked will be described. First, the suction fountain pen 1 in the state shown in FIG. 1
When is the tail cap 22 for example left rotation, the tail cap second cylindrical body 24 which is connected via a tail cap first cylindrical member 23 in tail cap 22 also rotates counterclockwise, fitted screw in 該尾 crown second cylindrical body 24 The combined ink tank cylinder 10 moves forward in the barrel 2 by urging the first coil spring 16 toward the pen 6 without rotating by engagement with the coupling body 3 shown in FIG. Thereby, as shown in FIG. 4, the ink suction pipe 18 which is connected to the tip of the ink tank tube 10 protrudes from the tip of the pen core 8.

When the ink tank cylinder 10 moves forward and its tip comes into contact with the wall surface 9a constituting the communication hole 9, the tail cap second cylinder 24 and the engaged member 25 are then turned on, as shown in FIG. The tail crown first cylinder 23 and the tail crown 22 move rearward, and as shown in FIG. 6, the screw fitting between the tail crown second cylinder 24 and the ink tank cylinder 10 is released, and the second coil spring 34 The tail crown 22 is pushed rearward by the urging. At this time, as shown in FIG. 7, the engaged member 25 is engaged with the engaging member 29 fixed to the rotating top 28, so that the rotating top 28 can also be rotated with the rotation of the tail crown 22.

When the tail crown 22 is further rotated to the left in this state, the rotary top 28 also rotates, and the screw 32
The suction rod 31 thus rotated also rotates. The suction rod 31 does not rotate because the valve portion 30 is in pressure contact with the inner wall surface of the ink tank cylinder 10, and slides in the ink tank cylinder 10 toward the pen core 8 as shown in FIG. The air in the ink tank cylinder 10 is discharged.

Although not shown, when the tail crown 22 is rotated clockwise, the suction rod 31 retreats and sucks ink. After the end of the inhalation operation, the tail crown 22 is rotated to the right while being pushed toward the trunk 2,
The engagement between the engaged member 25 and the engaging member 29 is released, and the screw fitting 26 between the tail cap second cylinder 24 and the ink tank cylinder 10 is performed. Further, by rotating the tail crown 22 clockwise, the ink tank tube 10 is retracted, and the ink suction pipe 18 is immersed in the pen core 8 to return to the original state. The ink flow at the time of writing is led out from the ink tank tube 10 to the ink suction pipe 18, flows out to the pen core 8 side by the inner core 21 provided in the ink suction pipe 18, and the tip of the ink suction pipe 18 The ink is drawn out to the pen core 8 and supplied to the pen 6 by the notch groove (not shown) formed in the pen.

[0023]

Inhalation fountain pen of the present invention according to the present invention, since the ink suction pipe when the ink suction inhales inks feeding from pen core, can inhale the ink contained in the ink bottle such to the end, also, the ink pen Since there is no need to immerse and inhale the ink, the neck of the pen or the barrel does not become stained with ink. Also, instead of sucking the ink by the restoring force of the rubber tube, the ink is not rotated by rotating the tail crown and moving the suction rod having a valve portion at the tip in the ink tank cylinder back and forth, as is conventionally known. Ink suction efficiency is high because of the so-called rotary ink suction structure that sucks ink. The structure is also based on the conventional rotary ink suction structure, and has an advantage that it can be obtained without requiring a complicated structure.

[Brief description of the drawings]

FIG. 1 is a longitudinal end view of an inhalable fountain pen showing an embodiment of the present invention.

In [2] 1, it is a lateral end view of the line I-I moiety.

FIG. 3 is an enlarged view of a main part in FIG.

FIG. 4 is a diagram illustrating an ink suction operation of the suction fountain pen according to the present embodiment, and is a diagram illustrating a state where an ink suction pipe is projected.

FIG. 5 is a diagram showing an ink inhaling operation of the inhalable fountain pen of the present embodiment, showing a state in which the tail crown protrudes rearward.

FIG. 6 is a diagram illustrating an ink suction operation of the suction fountain pen according to the present embodiment, and is a diagram illustrating a state where the rotating top is also rotated with the rotation of the tail crown.

FIG. 7 is a lateral end view taken along the line II-II in FIG. 6;

FIG. 8 is a diagram illustrating an ink suction operation of the fountain pen according to the present embodiment, showing a state in which the ink suction rod advances with rotation of the tail crown.

FIG. 9 is a vertical end view of a conventional inhalable fountain pen.

FIG. 10 is a view showing an ink suction operation of a conventional suction fountain pen, and showing a state in which an ink suction pipe is projected.

FIG. 11 is a view showing an ink suction operation of a conventional suction fountain pen, and showing a state in which a tail crown is extended backward.

FIG. 12 is a diagram showing an ink suction operation in a conventional suction fountain pen, showing a state in which a rubber tube is crushed by air pressure when the tail crown is returned to the inside of the barrel.

FIG. 13 is a view showing an ink suction operation in a conventional suction-type fountain pen, in which air pressure escapes into the barrel by returning the tail crown into the barrel, and the rubber tube returns to the original state and sucks ink. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inhalation type fountain pen 2 Body 8 Pen core 10 Ink tank cylinder 16 First coil spring 18 Ink suction pipe 22 Tail cap 23 Tail cap first cylinder 24 Tail cap second cylinder 25 Engagement member 26 Screw fitting 27 engaging means 28 rotating piece 29 engaging member 30 valve unit 31 suction bar 32 threaded fitting 34 second coil spring

Claims (2)

[Claims] To 1. A within the barrel, slidably disposed without rotating the ink tank barrel, the tip portion at the distal end of the ink tank cylinder housed within the pen core fitted to the barrel ink suction pipe At the rear end of the ink tank cylinder, a rotatable and slidable tail crown is connected to the rear end of the shaft cylinder by screw fitting, and the rotating top is slidably linked to the ink tank cylinder. When the tail crown is extended to the rear, the tail crown and the rotating top are provided with engagement means for engaging and connecting when the tail crown is extended backward, and the air in the ink tank cylinder is provided inside the rotating top. A suction rod provided with a valve part for discharging and sucking ink is provided by screw fitting, and the rotation of the tail crown causes the ink tank cylinder to advance and the tip of the ink suction pipe to protrude from the pen core. The barrel stops moving and the tail crown is extended backward, and the tail crown and ink tank The connection with the cylinder is released, the crown and the rotating top are connected by the engagement means, and the rotating top rotates with the rotation of the crown, and the rotation of the rotating top causes the suction rod to advance in the ink tank cylinder and ink. A suction fountain pen that discharges air from the tank cylinder and reverses the rotation of the tail crown to reversely rotate the rotating top and retract the suction rod to draw ink into the ink tank cylinder. 2. The inhalable fountain pen according to claim 1, wherein the ink tank cylinder is urged toward the tip end of the shaft cylinder by a coil spring, and the tail crown is urged rearward by a coil spring.