JPH0243099A - polygonal pen - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a polygonal pen that has excellent rigidity and durability and is easy to manufacture.

Prior Art In order to solve the inconvenience that commonly used single-nib writing instruments can only write in one angular direction, a plurality of pen-nib pieces (for example, three pieces) having a structure similar to this pen-nib are prepared. A polygonal pen has been proposed in which these pens are combined back-to-back to form a single body and can write in any direction.

A conventional example of such a polygonal pen is the one shown in Japanese Patent Laid-Open No. 55-128497, for example. This includes a pen nib base body having a body portion extending in the longitudinal direction, a protruding portion protruding outward in the radial direction at an angular interval of approximately 120 degrees on the outside of the eleven body portions, and the pen nib base body having It has a synthetic resin pen core that holds the pen tip base body by coming into close contact with the outer surface.

Problems to be Solved by the Invention However, in such a pen nib structure, the pen core is injection molded from synthetic resin, etc.
Because it is necessary to cut and bend an extremely thin ink passage in the body part so that the ink flows to the tip position by capillary action, processing is time-consuming and difficult. Also, regarding the holder piece, in order to be in close contact with the outer surface of the pen nib base body, its shape must be matched to the pen nib base body, which requires effort to ensure manufacturing accuracy.

Furthermore, the width of the ink passage may be too wide to cause sufficient capillary action.

The present invention was made to eliminate these drawbacks, and its purpose is to guide the ink smoothly, eliminate its backflow, have a durable pen tip, and minimize the difficulty of manufacturing work. It is an object of the present invention to provide a polygonal pen having the following structure.

Means for Solving the Problems In order to achieve the above object, the present invention has a polygonal nib base body, a hole extending along the central axis and accommodating the nib base body, and a proximal end at the tip portion. It has a pen tip holding tube with a tapered part that gradually reduces in diameter from the side to the tip side, and a guide hole that extends in the longitudinal direction and communicates with the pen tip accommodation hole. The pen nib consists of a pressing cylinder that is inserted into the accommodation hole and abuts against the rear end surface of the nib base body, and an ink guide core that is inserted from the guide hole through the nib housing hole and extends to the middle of the nib base body. The inner surface of the nib accommodating hole of the holding tube is provided with a locking part that securely holds the nib basic body, and the tip of the nib holding tube is integrally formed with a holder piece with a groove for passing the core formed inside. The gist of this paper is the polygonal pen installed in the .

Operation In the polygonal pen constructed as described above, the proximal end portion of the ink guide core is inserted into the ink reservoir of the polygonal pen to receive ink supply. The ink that has soaked into the ink guide core travels along the ink guide core from the proximal end toward the distal end, passes through the hollow part of the nib holding cylinder, and reaches the distal end of the nib holding cylinder. It passes through the core of the holder piece and is guided to the center of the nib base body. Since the ink guiding wick is made of a fibrous material, the ink is guided to the tip by capillary action of the ink guiding wick and is delivered to the tip of the nib base body. The basic body of the nib is fixed by engaging with the locking part inside the nib holding tube, so it does not wobble relative to the nib holding tube or even the pen shaft, allowing stable operation when writing letters, etc. becomes.

Embodiment FIGS. 1 to 8 are diagrams showing an embodiment of a polygonal pen according to the present invention.

In this embodiment, reference numeral 1 indicates a pen nib base body. The nib basic body 1 is made from a nib piece 2 made of a metal or ceramic material or a nib plate.

This pen tip piece 2 is bent at an angle of approximately 120 degrees with a line extending from the tip to the base end at approximately the center in the width direction as a bending line 3, so that the bent portion has a fairly sharp structure (second figure). As shown in an enlarged view in FIG. 2, this pen point piece 2 has stepped portions 9 formed in a small size on the inclined edges on both sides of the tip. .

Then, three pieces of each nib part 2 are joined together in a blue pattern, pasted together by spot welding or the like, and the tip portions are brought together to form the nib basic body 1. Pen nib basic body 1
differs from the above-mentioned conventional one in that it has a relatively slender body portion 4 that is narrowed radially inward toward the central axis of the pen nib base body 1.
and projecting portions 5 that protrude radially outward (that is, radially) at an angular interval of about 120 degrees on the outside of the body portion 4. The pen nib piece 2 is bent extremely sharply along a bending line 3, and a hole 6 with an extremely small diameter is formed in the center of the nib base body 1 to the extent that ink causes capillary action. Roughly speaking, in the pen nib base body 1 of the present invention, there is a relatively deep dimension (for example, about 8 mm) in the center of the tip of the body part 4 between one overhanging part 5 and another overhanging part 5. A cut-in middle 7 is provided.

On the other hand, a gap 8 is formed at the tip of the overhanging portion 5 by the step portions 9 coming together, and this gap 8 has a cutting depth of 2 to 3 mm.

Therefore, in the pen nib base body 1 of this embodiment, three relatively deep gaps each formed by the middle part 7 and three relatively shallow gaps 8 are formed alternately at equal angular intervals at the tip of the pen nib base body 1. When you move it on top, it becomes a path for ink to flow out onto the paper surface.

Then, the tip of the pen nib basic body 1 in which the gap 8 and the middle part 7 are formed is narrowed by the above-mentioned tip-adjusting operation, and has a pyramidal structure (specifically, a pentagonal pyramid) with an ink storage chamber 10 formed inside. structure).

FIG. 3 is a sectional view showing the configuration of the polygonal pen in this embodiment. In this figure, reference numeral 6 denotes a pen tip holding cylinder that fixes and holds the pen tip basic body. The pen tip holding cylinder 6 is made of a cylindrical body with a tapered shape whose diameter is slightly reduced at the tip, and pen tip accommodation holes 11a and 11b are formed inside it, as shown in FIG. . Both of the pen tip accommodating holes 118.11b are holes that communicate with each other and extend through the pen tip holding tube 6. However, in the proximal end portion of the pen tip holding tube 6, the pen tip has a substantially circular cross section. While a housing hole 11a is formed, the pen tip housing hole 11b has a pen tip fixing groove 13, which is a locking portion, formed in the inner wall 12 toward the distal end side of the pen tip holding cylinder 6. As is clear from FIG. 5, the pen tip accommodation hole 11b is
They are formed by being carved radially outward from the inner diameter surface 12'/)1, and are formed at equal intervals of approximately 120 degrees in the circumferential direction of the inner diameter surface 12. Further, an air hole 14 is formed in the side wall of the pen tip holding cylinder 6. Further, at the tip of the nib holding cylinder 6, there is a holder piece having a cross-sectional shape that fits the body part 4, that is, the recessed part between the protruding part 5 and the other protruding part 5 of the pen nib basic body 1. 15 are provided in the same number as the recessed portions.

A through groove 16 is formed on the inner surface of this holder piece 15 and extends from the pen tip accommodating hole 11b, and as shown in FIG. When these are combined, a passage is formed on the outer surface of the body portion 4 in a portion near the tip of the nib base body 1. This through groove 16 ends at a portion slightly before the tip of the boulder piece 15. Further, reference numeral 17 indicates a suppressing tube inserted into the pen tip accommodating hole 11a from the base end side of the pen tip holding tube 6. This pressing cylinder 17 is provided with six core insertion holes 18 as guide holes having a three-pronged cross-sectional shape.
Its outer diameter is set to be approximately the same as the inner diameter of the pen tip accommodating hole 11a.

Further, reference numerals 19a and 19b indicate ink guide cores. The ink guide cores 19a and 19b have a diameter that allows them to be inserted into each of the three-pronged portions of the core insertion hole 18 formed in the pressing cylinder 17, and the tip portion of each ink guide core 19a, 19b has a diameter that can be inserted into each of the three-pronged portions of the core insertion hole 18 formed in the pressing cylinder 17. It is molded to an even smaller diameter so that it can be installed inside the device. This ink guide core 19a
, 19b is made of a liquid-permeable material, such as polyester, nylon, acrylic, felt, glass! ! Various materials such as fiber and cotton are used.

When assembling the pen nib portion of the polygonal pen according to this embodiment, first, the pen tip base is inserted into the pen nib accommodation holes 11a, 11b of the pen nib holding cylinder 6 from the base end side of the pen nib holding cylinder 6. Insert body 1.

The pen tip basic body 1 has a tapered shape in which the tip portion gradually increases in diameter from the tip toward the base end, and also has a pen tip accommodation hole 11.
b is also formed into a tapered shape that gradually increases in diameter from the tip toward the base end at the tip of the pen tip holding cylinder 6, so the tip of the pen tip basic body 1 is at the tip of the pen tip holding fii6. It is locked inside the pen tip holding cylinder 6 at the point where it protrudes by a predetermined length from the pen tip holding cylinder 6. In this state,
When the press tube 17 is pushed into the pen tip accommodation hole 11a from the base end side of the pen tip holder H6, this pressing force rF! 117 is fitted into the pen tip accommodation hole 11a. Then, the tip of the pressing cylinder 17 abuts against the rearmost end of the pen nib basic body 1 in the nib holding cylinder 6, and the pen nib basic body 1 is firmly fixed and held in the pen nib holding cylinder 6.

Note that when inserting the pen nib base body 1 into the pen nib holding cylinder 6, each projecting portion 5 of this pen nib base body is inserted into the pen nib accommodation hole 1.
It fits into a fixing groove 13 formed on the inner diameter surface 12 of 1b, and the movement of this pen tip base body 1 in the rotational direction and the left-right direction (direction perpendicular to the central axis) is restricted. By fitting the pressing tube 17 into the pen tip holding tube 6, the movement of the pen tip basic body 1 in the direction of the central axis is regulated. It is securely held in place. Next, an ink guiding lead is inserted into a lead insertion hole 18 formed in the pressing cylinder 17 from the base end side of the pen tip holding cylinder 6 . In this embodiment, two ink guiding cores 19a and 19b are inserted into two locations of the trident-shaped core insertion hole 18. The ink guide wicks 19a and 19b extend from the respective three-pronged portions of the lead insertion hole 18 into the nib accommodating hole 11b of the nib holding cylinder 6, and are each a nib accommodating hole partitioned by the nib base body. It passes through each part of 11b to reach the through groove 16 of the corresponding holder piece 15. Then, at approximately the tip end portion of the through groove 16, the tip portions of the ink guiding cores 19a, 19b come into contact with the intermediate portion 7 formed at the tip portion of the body portion 4 of the pen nib base body 1. It should be noted that, of the passage divided by the nib base body 1 of the nib accommodation hole 11b, the portion where the ink guiding cores 19a and 19b are not inserted is communicated with the outside of the nib holding cylinder 6 through the air hole 14. There is. In this way, by assembling the pen nib basic body 1, the nib holding cylinder 6, the pressing cylinder 17, and the ink guiding cores 19a and 19b, the nib structure of the polygonal pen of this embodiment is completed. This pen nib structure is then attached to the pen shaft 20.

The pen shaft 20 includes a cylindrical shaft body 21, a holding portion 22 attached to the tip of the shaft body 21, and a plug member 23 that closes the rear end of the shaft body 16. The inside of the shaft body 21 has an elongated container structure with an open tip and a rear end closed by a plug member 23, and an ink reservoir member 24 filled with ink is packed inside this container. It is rare. This ink reservoir member 24 is connected to the shaft body 21 on the distal end side.
It is fixed by abutting an annular protrusion 25 formed on the inner surface thereof so as to protrude radially inward, and abutting the plug member 23 at the rear end side. The ink guiding cores 19a and 19b of the pen nib structure supported by the holding part 22
enters the ink reservoir member 24 in the pen shaft body 21 to form an ink guide path. Further, the protrusion 25 abuts on an annular protrusion 26 formed on the outer surface of the press tube 17 so as to protrude outward in the radial direction, thereby fixing the press tube 17 in the front-rear direction.

In such a configuration, ink flows through the ink guiding core 19a,
After being pulled out from the ink reservoir member 24 at the base end of 19b,
It passes between the II efts constituting the ink guiding cores 19a and 19b, passes through the pressing cylinder 17 and the nib holding cylinder 6, passes through the holder piece 15 of the nib holding cylinder 6, and near the tip of the nib base body 1. be led to. Near the tip of the holder piece 15, as described above, the ink guide cores 19a, 1
9b is in contact with the middle part 7 of the pen nib base body, so the ink penetrates into the interior of the pen light body 1 through the gap formed by the middle part 7, and further reaches the tip of the pen nib base body 1. The ink is stored in an ink storage chamber 10 installed at the tip of the ink.

The ink stored in the ink storage chamber 10 permeates (that is, leaches) to the outside of the pen nib base body 1 again through all the gaps 8 and the middle portions 7 facing the ink storage chamber 10, and the user can be written on. In this way, the ink storage chamber 10 allows the ink flowing from the ink reservoir member 24 through the ink guide wicks 19a, 19b to be passed from the ink guide wicks 19a, 19b through the middle 7 into the interior of the pen nib base body 1. After that, spread the ink evenly into all the remaining gaps 8 and middle parts 7 (there are 6 places in total), and then apply the pen tip base body 1 from any gap 8 or middle part 7 under the same conditions. It has the role of exuding to the outside. At the part where ink enters the ink storage chamber 10, the ink guiding cores 19a, 19b and the middle part 7 are in close contact with each other, and the holder piece 15 itself is in contact with the outer periphery of the nib base body 1 around the contact area. Because it is in close elastic contact with the surface, air may enter the ink path from the outside and the flow of ink may be obstructed, or the ink may flow into the ink guide core 19a,
It does not seep out from 19b, pass between the holder piece 15 and the pen tip basic body 1, and flow out. Therefore, the ink correctly passes through the middle part 7 and enters the ink storage chamber 10,
Furthermore, the liquid leaches out through any one of the six gaps 8 or the intermediate portions 7 in the area closer to the pen tip. This kind of ink infiltration and seepage into the ink storage chamber 10 is largely due to the capillary phenomenon that occurs in the gap 8 or the middle part 7. When the pen is not in use, keep the pen tip facing F. Also, since the ink is retained by the capillary phenomenon in the middle part 7 and the ink guiding cores 19a and 19b, the ink will not flow back from the ink storage chamber 10.Therefore, the pen can be used to write without any trouble whenever you want. be able to.

As has been described in detail, according to the present invention, when ink is supplied into the pen nib base body through the crack formed in the pen nib portion, the member holding the pen nib base body is provided with a longitudinal length. A through hole extending in the direction is formed, and an ink guide core made of a liquid-permeable material is installed in the through hole and connected to the ink reservoir member, so that ink flows from the ink reservoir member through the ink guide core. It is guided through the pen tip to near the tip of the basic body of the pen, and the capillary action does not break on the way. Therefore, ink can be stably guided from the ink reservoir member to the vicinity of the pen tip. In addition, the pen nib base body was inserted into the pen nib holding tube, which was made immovable, and was held with a pressure tube from the rear, which ensured that the pen nib base body was securely attached, making it easy to write. etc. operations become stable.

Furthermore, when the pen tip base body is made of a ceramic material, the pen tip portion will not be deformed or damaged even if subjected to some impact, and can always be kept in a normal state. Therefore, according to the present invention, it is possible to provide a polygonal pen that allows you to enjoy a comfortable old-fashioned feel at any time.

[Brief explanation of the drawing]

FIG. 1 is a front view of a pen nib base body used in a polygonal pen according to an embodiment of the present invention. FIG. 2 is a view of the pen tip basic body of FIG. 1 seen from the back side. FIG. 3 is a sectional view showing the internal structure of a polygonal pen according to an embodiment of the present invention. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. FIG. 5 is a sectional view taken along line v--■ in FIG. 3. FIG. 6 is a sectional view taken along line Vl-Vl in FIG. 3. FIG. 7 is a sectional view taken along line V[-Vl in FIG. 3, showing an enlarged view of the tip of the pen. FIG. 8 is an enlarged sectional view showing in detail the structure of the pen tip structure constituting the polygonal pen according to the embodiment. 1... Pen tip basic body, 2... Pen tip piece, 4...
Body portion, 5... Overhanging portion, 6... Pen tip holding tube, 7.
... Intermediate division, 8... Gap, 11a, 11b... Pen tip accommodation hole, 12... Inner diameter surface, 13... Fixing groove (locking part), 15... Holder piece, 16... ...Through groove, 17...
・Press tube, 18... Core insertion hole, 19a, 19b...
Ink guide core, 20... Pen shaft, 24... Ink reservoir member. Patent applicant Shizuo Yamanaka Agent Patent attorney Masahiro Kura Go Figure 3 Figure 7 Figure 8 Figure 4

Claims (1)

[Scope of Claims] A body portion extending in the longitudinal direction, and a plurality of projecting portions protruding outward at predetermined angular intervals on the outside of the body portion with a substantially radial cross section, the projecting portions A plurality of intermediate portions are formed at the tip of the body portion between the and the overhang portion, and a plurality of gaps are formed alternately at equal angular intervals at the tip of the overhang portion, and the tip portion has a conical structure, and a pen nib base body having an ink storage chamber in an inner portion of the middle part and the gap; having a hole extending along the central axis and accommodating the nib base body;
The pen tip holding tube has a tapered part whose diameter gradually decreases from the proximal end to the distal end at the distal end, and a guide hole extending in the longitudinal direction and communicating with the pen tip accommodation hole, and the rear end of the pen tip holding tube. A pressing tube that is inserted into the nib housing hole and abuts against the rear end surface of the nib base body; and an ink made of a fiber material that is inserted from the guide hole through the nib housing hole and extends to the middle of the nib base body. The inner surface of the nib accommodating hole of the nib holding tube is provided with a locking part that securely holds the nib basic body, and the tip of the nib holding tube has a core threading groove formed inside. A polygonal pen characterized by integrally provided with a holder piece.