JP3173988U - fountain pen - Google Patents

Abstract

An ink suction fountain pen capable of reliably supplying ink is provided.
A nib fixing portion for fixing a nib, and a cylindrical ink tank portion having an ink suction port, which is fixed to a side opposite to the nib of the nib fixing portion and sucks ink through the nib. And an ink suction portion that is disposed in the cylindrical ink tank portion and has a valve portion and an operation portion that move along the axial direction. The ink can be sucked by moving the ink suction part in the ink tank part in the direction opposite to the ink suction port. The valve portion is formed in a cylindrical shape, and its diameter is slightly smaller than the inner diameter of the cylindrical ink tank portion.
[Selection] Figure 4

Description

  The present invention relates to a fountain pen, and more particularly to an improvement of an ink inhalation type fountain pen.

  Generally, there are two types of fountain pens: an ink suction type and a cartridge type. Conventional ink-inhalation fountain pens include those described in Patent Document 1 and Patent Document 2, for example.

  In such an ink inhalation type fountain pen, each has a cylindrical ink tank in the shaft part of the fountain pen main body, and a valve portion having a diameter in close contact with the inner peripheral surface of the ink tank. An ink sucking unit is provided, and the ink sucking unit is operated in a state where the pen tip is immersed in an ink tub, thereby sucking ink by making the inside of the ink tank into a negative pressure state.

When a predetermined time elapses after starting to use the fountain pen, the ink may solidify and adhere to the inner peripheral surface of the ink tank.
In such a case, in the conventional ink suction type fountain pen, as described above, the valve portion of the ink suction portion is in close contact with the inner peripheral surface of the ink tank, so that the ink is not clumped. If it adheres to the inner peripheral surface of the ink tank, it may interfere with the close contact of the valve portion with the inner peripheral surface, and a negative pressure sufficient for ink suction may not be formed.

Therefore, in such a case, there is a problem that the negative pressure cannot be effectively formed in the ink tank and it may be difficult to suck up the ink or the ink may not be sucked. It was.
Japanese Patent Laid-Open No. 2001-138585 Japanese Utility Model Publication No. 35-20425

  The present invention is for solving such a conventional problem, and an object of the present invention is to provide an ink suction type fountain pen capable of reliably supplying ink.

  In order to achieve the above object, according to the first aspect of the present invention, the pen tip fixing portion to which the pen tip is fixed and the pen tip fixing portion opposite to the pen tip side are fixed, and ink is supplied through the pen tip. A cylindrical ink tank portion having an ink suction port for suction, and an ink suction portion disposed in the cylindrical ink tank portion and having a valve portion and an operation portion that move along an axial direction. An ink suction fountain pen capable of sucking ink by moving a portion in a direction opposite to the ink suction port in the ink tank portion, wherein the valve portion is formed in a cylindrical shape, and the diameter of the fountain pen is the cylindrical ink tank It is characterized by being formed slightly smaller than the inner diameter of the part.

  Therefore, according to the first aspect of the invention, when the ink suction portion is operated, the inside of the ink tank becomes substantially negative pressure by the movement of the valve portion, and a negative pressure capable of sucking ink is formed. Therefore, the ink can be sucked up from the ink tub or the like and sucked into the ink tank.

  In the invention according to claim 2, an ink leakage prevention portion is formed at the rear end portion of the valve portion, and an ink leakage prevention portion is formed at the rear end portion of the valve portion. The rear end of the valve portion is engaged and fixed to the ink tank portion.

  Therefore, according to the second aspect of the present invention, even if the sucked ink rises in the ink tank, it is blocked by the ink leakage prevention portion.

According to a third aspect of the present invention, a screw portion is provided at the rear end portion of the valve portion, and a screw portion that is screwed into the screw portion is provided at the rear end portion of the inner peripheral surface portion of the ink tank portion. It is provided.
Therefore, according to the third aspect of the present invention, the valve part constituting the ink suction part is fixed in the ink tank part.

  In the invention according to claim 4, the ink tank portion is provided with a weight portion capable of ensuring a balance during writing when a user holds the fountain pen shaft portion with a finger. It is characterized by being.

  Therefore, in the device according to the fourth aspect, it is possible to write with the balance maintained at the time of use.

  The invention according to claim 5 is characterized in that the pen point is fixed to the tip of the fountain pen main body shaft part through a holder member capable of supporting the front surface part side and the back surface part side.

  In the fountain pen according to the first aspect of the invention, the valve portion is formed in a cylindrical shape, the diameter of the valve portion is slightly smaller than the inner diameter of the cylindrical ink tank portion, and the valve portion is an inner periphery of the ink tank. Since it does not adhere to the surface, a lump of ink or the like is interposed between the inner peripheral surface of the ink tank and the valve portion, and a gap is generated between the valve portion and the inner peripheral surface of the ink tank. Even when the ink suction portion is operated, it is possible to effectively prevent a situation in which a negative pressure cannot be formed in the ink tank and ink cannot be sucked up.

  On the other hand, when the ink suction part is operated, the peripheral part of the valve part is disposed slightly inside the inner peripheral surface of the ink tank, so that a negative pressure necessary and sufficient for ink suction can be formed. There is no inconvenience for inhalation of ink.

  Further, as described above, the valve portion is disposed slightly inside the inner peripheral surface of the ink tank, and does not adhere to the inner peripheral surface of the ink tank, so that a negative pressure required for ink suction is formed. Therefore, the operation of the ink sucking portion can be easily performed.

  According to the second aspect of the invention, in addition to the effect of the first aspect, an ink leakage prevention portion is formed at the rear end portion of the valve portion, and the rear end portion of the operation portion is cylindrical. Even if the ink that is engaged and fixed to the ink tank and the sucked up ink rises in the ink tank is blocked by the ink leakage preventing section, the sucked-up ink leaks even in the case of the suction type. Dashi stock can be effectively prevented.

  In the invention according to claim 4, in addition to the effect according to claim 1, in the ink tank part, when the user holds the fountain pen body shaft part with a finger, a balance at the time of writing is secured. Because it can be written with a weight part that can be done and kept in balance while in use, it is easy to use, and even when used for a long time, it does not get tired and it can be written comfortably continuously Can provide a fountain pen

It is a disassembled perspective view which shows one Embodiment of the fountain pen which concerns on this invention, Comprising: It is a figure which shows the state which removed the cap part from the fountain pen shaft main part. FIG. 3 is an exploded side view showing the fountain pen main body shaft part with the cover part removed, showing an embodiment of the fountain pen according to the present invention. 1 is an exploded perspective view showing an embodiment of a fountain pen according to the present invention and showing a mounting structure of a pen tip. FIG. 2 is an exploded perspective view showing the structure of an ink tank part and an ink suction part, showing an embodiment of a fountain pen according to the present invention. FIG. 4 is an exploded perspective view showing an embodiment of the fountain pen according to the present invention, showing the structure of the ink tank part, the ink suction part and the weight part, and the attached state with the pen tip fixing part.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.
As shown in FIG. 1, the fountain pen 10 according to the present embodiment includes a fountain pen body shaft portion 11 and a cap portion 12 that covers the pen tip side of the fountain pen shaft body 11.

  As shown in FIGS. 1, 2, and 4, the fountain pen body shaft portion 11 is fixed to the pen tip fixing portion 13 to which the pen tip 21 is fixed, and the pen tip fixing portion 13 on the side opposite to the pen tip, An elongated cylindrical ink tank portion 15 having an ink suction port 14 for sucking ink from an ink tub or the like through a pen tip 21 and a valve portion disposed in the ink tank portion 15 and moving along the axial direction. 16 and an ink suction part 18 having an operation part 17, and is configured to be able to suck ink by sliding the ink suction part 18 in the ink tank part 15 toward the anti-ink suction port 14. .

As shown in FIG. 2, the ink tank portion 15 is disposed in the cover portion 19, and the cover portion 19 is screwed into a screw portion 20 formed at the rear end portion of the pen tip fixing portion 13. , And is fixed to the pen tip fixing portion 13.
In the present embodiment, the cover portion 19 and the cap portion 12 are mainly made of marble ebonite or mainly made of wood.

  As shown in FIG. 3, in the present embodiment, the nib 21 is a so-called “both-bello type”, and the nib body 22 has an upper surface portion and a lower surface portion, which respectively constitute a holder member. It is supported in the length direction by the tongue portion 23 and the lower tongue portion 24, and the rear end portions of the upper tongue portion 23 and the lower tongue portion 24 are inserted and fixed to the cylindrical fixture 25, and the nib is inserted through the cylindrical fixture 25. The fixing portion 13 is inserted and fixed into the pen tip fixing portion 13 from the tip opening portion 26.

As shown in FIG. 4, an ink suction portion 18 is disposed in the ink tank portion 15.
The ink suction portion 18 includes a cylindrical valve portion 16 and an operation portion 17 provided at the rear end portion of the cylindrical valve portion. When ink is sucked, the operation portion 17 is arranged in the axial direction of the ink tank portion 15. By pulling outward along the ink tank, the ink suction section 18 slides in the ink tank section 15 along the axial direction, and sucks ink from the ink bottle by the negative pressure formed in the ink tank section 15. It is configured.

  In the present embodiment, as shown in FIG. 4, the diameter L of the valve portion 16 is slightly smaller than the inner diameter L <b> 1 of the ink tank portion 15. Accordingly, since the valve portion 16 slides in the ink tank portion 15 in the immediate vicinity of the inner peripheral surface of the ink tank portion 15, the ink portion 15 is moved into the ink tank portion 15 by sliding the valve portion 16 in the direction opposite to the pen tip. A negative pressure sufficient to inhale can be formed.

  At the rear end portion of the valve portion 16, an ink leakage prevention portion 27 including a plurality of circumferential slits provided along the axial direction is formed. A large-diameter portion 32 is formed at the rear end of the operation portion 17 and is disposed outside the rear end 28 of the ink tank portion 15 when fixed.

  A screw portion 29 is provided at the inner peripheral surface portion of the ink tank portion 15 at the rear end portion of the ink tank portion 15, and a screw that is screwed into the screw portion 29 at the rear end portion of the valve portion 16. When the ink suction part 18 is provided in the ink tank part 15, the screw part 30 is screwed into the screw part 29, so that the ink suction part 18 becomes the ink tank. It is fixed to the part 15.

  Further, as shown in FIG. 5, a weight portion 31 is provided in the ink tank portion 15. The weight portion 31 can secure a balance during writing when the user grips the fountain pen body shaft portion 11 with a finger. ing.

The weight portion 31 includes a shaft portion 32, a large-diameter portion 33 provided near the tip portion of the shaft portion 32, and a weight body 34 provided at the rear end portion. The ink suction part 18 is disposed outside the weight part 31 and slides in the ink tank part 15.
In the present embodiment, the weight main body 34 has a substantially truncated truncated cone shape and is formed of 18 gold. The weight body 34 is arranged so that the fountain pen shaft main body 11 is most easily gripped when the user grips the fountain pen shaft main body 11 during writing.

Hereinafter, the operation of the fountain pen according to the present embodiment will be described.
When using the fountain pen 10 according to the present embodiment and inhaling ink into the ink tank 15, as shown in FIG. 2, as shown in FIG. 2, the cover 19 is rotated and the screw portion 20 of the pen tip fixing portion 13. The ink suction portion 18 is made slidable with respect to the ink tank portion 15 by removing the screw from the screw portion 29 and rotating the operation portion 17 to release the screw engagement between the screw portion 29 and the screw portion 30. Soak in the inkwell.

Then, ink in the ink fountain can be sucked into the ink tank portion 15 by pulling the ink suction portion 18 in the direction opposite to the pen tip 22 by the operation portion 17.
In this case, as described above, the inner diameter L of the valve portion 16 is formed to be slightly smaller than the inner diameter L1 of the ink tank portion 15, and the valve portion 16 is located at the position closest to the inner peripheral surface of the ink tank portion 15. Since the inside of the portion 15 is slid, the negative pressure necessary for sucking ink can be formed in the ink tank portion 15 by sliding the valve portion 16 in the direction opposite to the pen tip 22.

  When ink is sucked, the ink sucking portion 18 is returned into the ink tank portion 15, the operation portion 17 is rotated and the screw portion 30 is screwed into the screw portion 29, and the ink sucking portion 18 is moved to the ink tank portion 15. The cover part 19 is screwed into the screw part 20 of the pen tip fixing part 13 and fixed. In this state, the user can hold and write the fountain pen main body shaft 11 with his / her finger.

  In the fountain pen 10 according to the present embodiment, an ink leakage prevention portion 27 including a plurality of circumferential slits provided along the axial direction is formed at the rear end portion of the valve portion 16. Therefore, even when the sucked ink reaches the rear end portion of the valve portion 16, the ink leakage prevention portion 27 prevents the ink from rising, so that the ink leakage can be effectively prevented.

  Accordingly, since the fountain pen 10 according to the present embodiment is formed slightly smaller than the inner diameter L1 of the ink tank portion 15 as described above, the valve portion 16 in the direction opposite to the pen tip is formed. By sliding, a negative pressure necessary and sufficient for sucking ink can be formed in the ink tank portion 15 and the valve portion 16 is not in close contact with the inner peripheral surface of the ink tank portion 15. Sometimes, even when ink lumps are formed on the inner peripheral surface of the ink tank, the ink lumps hinder the sealed state between the inner peripheral surface of the ink tank 15 and the valve portion 16 as in the prior art. It is possible to effectively prevent the situation where the ink cannot be sucked.

  As a result, the fountain pen 10 according to the present embodiment can provide a fountain pen that does not make it difficult to inhale ink due to a mass of ink even if it is an inhalation type.

In addition, since the weight portion 31 is built in the ink tank portion 15, the weight balance in the axial direction and the radial direction when the fountain pen 10 is held with a finger is good, and when the writing is performed for a long time. Fatigue can be reduced.
Note that the material of the cap part 12 and the cover part 19 and other components is not limited to the present embodiment. Moreover, it is not limited regarding the form of a component.

  Since the present invention can be widely applied to an inhalation type fountain pen, it has industrial applicability.

10 fountain pen 11 fountain pen main shaft 12 cap part 13 nib fixing part 14 ink suction port 15 ink tank part 16 valve part 17 operation part 18 ink suction part 19 cover part 20 screw part 21 nib 22 nib body 23 upper tongue part (Holder member)
24 Lower tongue (holder member)
25 Cylindrical fixture 26 Front end opening portion 27 Leakage prevention portion 28 Rear end 29 Screw portion 30 Screw portion 31 Weight portion 32 Shaft portion 33 Large diameter portion
34 Weight body

Claims (5)

A nib fixing portion to which the nib is fixed, a cylindrical ink tank portion having an ink suction port, which is fixed to the side opposite to the nib side of the nib fixing portion and sucks ink through the nib, and An ink suction part having a valve part and an operation part arranged in a cylindrical ink tank part and moving in the axial direction;
An ink suction fountain pen capable of sucking ink by moving the ink suction part in the ink tank part in the direction opposite to the ink suction port,
The fountain pen according to claim 1, wherein the valve portion is formed in a cylindrical shape and has a diameter that is slightly smaller than an inner diameter of the cylindrical ink tank portion.   2. The fountain pen according to claim 1, wherein an ink leakage prevention portion is formed at a rear end portion of the valve portion, and a rear end of the valve portion is engaged and fixed to an ink tank portion.   The screw portion is provided at the rear end portion of the valve portion, and the screw portion that is screwed into the screw portion is provided at the rear end portion of the inner peripheral surface portion of the ink tank portion. The fountain pen described in 2.   4. The weight portion capable of ensuring a balance during writing when the user grips the fountain pen main body shaft portion with a finger in the ink tank portion. fountain pen.   5. The fountain pen according to claim 4, wherein the pen nib is fixed to the tip of the fountain pen main body shaft through a holder member capable of supporting the front side and the back side.