JP4553309B2 - Writing instrument - Google Patents

Description

  The present invention relates to a writing instrument comprising a writing instrument main body in which a pen core having a self-priming property is inserted into a pen core holding part at a tube tip, and an ink occlusion type ink cartridge inserted into the writing instrument main body.

It consists of a writing instrument body in which a pen core having ink self-absorbing property is inserted into the pen core holding part of the cylinder tip, and an ink storage type ink cartridge inserted into the writing instrument body. A writing instrument with a pen core embedded in an ink occlusion body is widely known, but since this type of conventional writing instrument uses a disposable ink cartridge, the ink cartridge must be replaced. For ease of writing, the writing instrument body should consist of a shaft cylinder with a pen core inserted into the pen nib holder at the cylinder tip and a tail plug that closes the rear end opening, or the pen nib is inserted into the pen nib holder at the cylinder tip In this case, the gripping cylinder is screwed to the neck, and in any case, it consists of a writing instrument body and an ink cartridge consisting of two members, and the number of parts is increased. It is troublesome to open and close and screw the gripping cylinder to the neck, or to pull out the cartridge and to refill the ink, and it is easy to get your fingers dirty during the cartridge replacement work. Had some problems such as being unfavorable both economically and environmentally.
Japanese Utility Model Publication No. 6-3688 JP 2002-67573 A

  An object of the present invention is to solve the above-mentioned problems and reduce the number of parts. In addition to opening and closing the tail plug, screwing the gripping cylinder to the neck, removing the cartridge, and other inks An object of the present invention is to provide a writing instrument that can simplify the number of steps for replenishment and that does not contaminate fingers during a series of operations, and that is also economical and environmentally friendly.

  The writing instrument of the present invention that has solved the above-described problems is a writing instrument body in which a pen core holding portion is provided at the end of a cylindrical tube having a base end as an ink cartridge insertion port, and a pen core having ink self-absorbing property is inserted into the pen core holding portion. And an ink cartridge in which a cylindrical container inserted into the shaft cylinder of the writing instrument body is filled with an ink occlusion body, and an ink cartridge insertion port of the writing instrument body is formed at the rear end of the ink cartridge inserted into the shaft cylinder A writing instrument that is sealed with a tail plug portion and has a pen core base of the writing instrument body embedded in an ink occlusion body, wherein the ink cartridge is provided on the inner surface of the shaft cylinder of the writing instrument body and the outer surface of the cylindrical container of the ink cartridge. The bayonet-type striker is composed of a fixed-side stopper part and a movable-side stopper part that can be detached and attached to the writing instrument body by rotating it. And basic configuration which is characterized in that is provided with a path mechanism.

  And in the above-mentioned writing instrument, while providing the notch for finger pad portion intervention directed toward the tip from the cartridge insertion opening to the shaft cylinder of the writing instrument body, the outer surface of the cylindrical container of the ink cartridge The appearance of the ink cartridge is improved by providing a finger contact portion that is narrower than the width of the cutout and that intervenes in the cutout when the ink cartridge is inserted into the shaft barrel. According to the invention of claim 2, the rod-shaped guide ridge extending in the axial direction is provided on the inner surface of the shaft cylinder of the writing instrument body, and the tip of the fixed stopper is described above. On the other hand, the outer surface of the cylindrical container of the ink cartridge is provided with an arrow-shaped low ridge extending in the axial direction, and the jaw end of the arrowhead portion following the arrow handle portion is the movable side stopper portion described above. Thus, the ink cartridge can be smoothly inserted into the shaft cylinder of the writing instrument body. The invention according to claim 3 is used, and the arcuate guide heading the tip of the arrowhead in this invention from the pointed end toward the movable side stopper portion In this process, the arc-shaped guide portion abuts on the rear end of the rod-shaped guide ridge during the process of inserting the ink cartridge into the shaft cylinder so that the ink cartridge is guided to be inserted into a fixed position in the shaft cylinder. This is the invention of claim 4.

  Furthermore, in the above inventions of claims 2 to 4, by providing an elongated recess along the arrowhead portion of the arrow-shaped low bulge on the outer surface of the cylindrical container of the ink cartridge, the guide bulge of the writing instrument main body is inserted into this. The invention according to claim 5 is such that the ink cartridge does not fall out even when the ink cartridge before the fixed side stopper portion and the movable side stopper portion are engaged is merely inserted into the shaft cylinder.

  Such a writing instrument may be composed of two members: a writing instrument main body in which a pen core having ink self-priming property is inserted in the pen core holding portion at the tube tip, and an ink occlusion type ink cartridge inserted into the writing instrument main body. The number of parts is reduced. Further, the ink cartridge insertion port of the writing instrument body is sealed by a tail plug portion formed at the rear end of the ink cartridge inserted into the shaft tube, so that ink leakage occurs even though there is no dedicated lid. In addition, there is no need to open and close the lid. In addition, a bayonet-type stopper mechanism consisting of a fixed stopper provided on the inner surface of the shaft cylinder of the writing instrument body and a movable stopper provided on the outer surface of the cylindrical container of the ink cartridge is used to connect the writing instrument body and the ink cartridge. Therefore, when ink runs out, the ink cartridge is rotated in one direction to release the engagement between the movable stopper on the outer surface and the fixed stopper on the writing instrument body, and then pull out the ink cartridge. For example, the ink cartridge is easily separated from the writing instrument body. Therefore, when the ink cartridge is made disposable, it can be easily replaced with a new one, and the ink cartridge cylindrical container is designed to be as strong as the shaft cylinder without making the ink cartridge disposable. By making it excellent, it can be used repeatedly only by replenishing ink to the internal ink occlusion body from the front end opening of the ink cartridge extracted from the writing instrument body.

  When a new or ink refilled ink cartridge is incorporated into the writing instrument main body, the ink cartridge is inserted into the writing instrument main body through the ink cartridge insertion opening at the base end of the shaft tube, and the ink cartridge is inserted into the writing instrument main body. If the movable side stopper on the outer surface is locked to the fixed side stopper on the inner surface of the writing instrument body, the ink cartridge can be accurately and easily moved relative to the writing instrument body. It is integrated so that writing is possible, and the ink does not touch the fingers during this time, so the fingers and surroundings are not soiled.

  Further, in the writing instrument described above, while providing a notch for finger pad portion intervention directed from the cartridge insertion opening to the shaft cylinder of the writing instrument body, the outer surface of the cylindrical container of the ink cartridge The width of the cutout is narrower than that of the cutout, and when the ink cartridge is inserted into the barrel, the cutout is provided in the cutout. This is effective for writing, and is also more convenient for inserting the ink cartridge into the shaft tube. Further, a rod-shaped guide ridge extending in the axial direction is provided on the inner surface of the shaft cylinder of the writing instrument main body, and the tip thereof is used as the fixed-side stopper portion, while an arrow-shaped low bulge extending in the axial direction is formed on the outer surface of the cylindrical container of the ink cartridge. In the case where the jaw end of the arrowhead part following the arrow handle part is used as the movable side stopper part described above, the ink cartridge is smoothly inserted into the shaft cylinder of the writing instrument body under the guide of the bar-like guide ridge and the arrow-shaped low ridge. In particular, in the case where the tip of the arrowhead part is an arcuate guide part from the pointed end toward the movable stopper part, the arcuate guide part is formed into a rod-like guide bulge in the process of inserting the ink cartridge into the shaft cylinder. Since the ink cartridge is guided so as to be inserted into a fixed position in the shaft cylinder at the rear end, there is no need for positioning when the ink cartridge is inserted into the shaft cylinder. Become a thing. Furthermore, if an elongated recess along the arrow-shaped portion of the arrow-shaped low bulge is provided on the outer surface of the cylindrical container of the ink cartridge, the guide bulge of the writing instrument body enters the elongated recess, and the fixed-side stopper portion and the movable-side stopper portion The ink cartridge does not fall off even before the is engaged.

Next, a preferred embodiment of the present invention will be described in detail with reference to the drawings.
Reference numeral 1 denotes a writing instrument body, and 2 denotes an ink cartridge that is removably inserted into the writing instrument body 1. The writing instrument main body 1 has a base end of a shaft cylinder 11 made of a hard synthetic resin material formed in the ink cartridge insertion opening 12 and a cylinder tip as a neck seat portion in which a pen core holding portion 13 is formed narrowly. A pen lead 14 having ink self-priming property is inserted into the pen lead holding part 13 described above. On the other hand, the above-described ink cartridge 2 is filled with a batting-type ink occlusion body 22 inside a cylindrical container 21 formed with a diameter that can be inserted into the above-described shaft cylinder 11 with a hard or semi-rigid synthetic resin material. When the ink cartridge 2 is inserted into the shaft cylinder 11 through the ink cartridge insertion port 12 described above, the base of the pen core 14 is buried in the internal ink storage 22 through the tip opening of the shaft cylinder 11. When the ink cartridge 2 is assembled to the writing instrument body 1, the ink cartridge insertion opening 12 of the writing instrument body 1 is formed at the tail plug portion 23 formed at the rear end of the ink cartridge 2 inserted into the shaft cylinder 11. Is to be sealed. In addition, 7 is a cap fitted to the neck seat part of the writing instrument main body 1.

  Further, the ink cartridge 2 inserted in the shaft cylinder 11 is rotated between the inner surface of the shaft cylinder 11 of the writing instrument body 1 and the outer surface of the cylindrical container 21 of the ink cartridge 2 by rotating the ink cartridge 2. The bayonet-type stopper mechanism comprising a fixed-side stopper portion 31 and a movable-side stopper portion 32 that take two modes, ie, a state where the ink cartridge 2 can be inserted into and removed from the writing instrument body 1 and a state where it cannot be inserted and removed. The ink cartridge 2 can be attached to and detached from the writing instrument body 1, and the shaft cylinder 11 of the writing instrument body 1 has a notch for interposing a finger pad portion directed from the cartridge insertion opening 12 to the front. 15 and 15 are provided facing each other. On the other hand, on the outer surface of the cylindrical container 21 of the ink cartridge 2, the ink cartridge 2 is narrower than the width of the notch 15 so that the ink cartridge 2 can be slightly rotated inside the shaft cylinder 11 of the writing instrument body 1. A finger pad 24 is provided in the notch 15 as described above when 2 is inserted into the shaft 11.

  Further, a rod-like guide ridge 4 extending in the axial direction is provided on the inner surface of the shaft tube 11 of the writing instrument body 1, and the tip of the guide ridge 4 serves as the fixed-side stopper portion 31 described above, while the ink cartridge The outer surface of the second cylindrical container 21 is provided with an arrow-shaped low bulge 5 extending in the axial direction, and the jaw end of the arrowhead portion 52 following the arrow handle 51 serves as the movable-side stopper portion 32 described above. Note that the tip of the arrowhead 52 is an arcuate guide 53 extending from the pointed end toward the movable stopper 32, and the arcuate guide 53 is a rod-like shape in the process of inserting the ink cartridge 2 into the shaft cylinder 11. The ink cartridge 2 is guided so as to be inserted into a fixed position in the shaft cylinder 11 by both of them contacting the rear end of the guide ridge 4. An elongated recess 6 for receiving the guide ridge 4 of the writing instrument body 1 is provided at a position along the arrow handle 51 of the arrow-shaped low ridge 5 on the outer surface of the cylindrical container 21 of the ink cartridge 2. Thus, the ink cartridge 2 does not fall out even before the guide ridge 4 of the writing instrument body 1 enters and the fixed side stopper portion 31 and the movable side stopper portion 32 are engaged.

  As described above, the present invention solves the problems of this type of conventional writing instrument and reduces the number of parts, and also opens / closes the tail plug, screwes the gripping cylinder around the neck, or removes the ink cartridge or other ink. The number of steps for replenishment can be simplified, and the fingers are not soiled during the series of operations, and it is preferable in terms of economy and environment.

It is a partially cutaway front view showing a preferred embodiment of the present invention. It is a partially cutaway perspective view showing a preferred embodiment of the present invention in a state where an ink cartridge is extracted from the writing instrument body. It is a partially cutaway front view of a writing instrument main body. FIG. 3 is a partially cutaway front view of an ink cartridge. It is a vertical side view of preferable embodiment of this invention.

Explanation of symbols

1 Writing instrument body
11 Shaft cylinder
12 Ink cartridge slot
13 Pen core holder
14 Pen core
15 Notch for finger pad intervention 2 Ink cartridge
21 Tubular container
22 Ink absorber
23 Tail plug
24 Finger rest 3 Bayonet type stopper mechanism
31 Fixed side stopper
32 Movable stopper 4 Bar-shaped guide bump 5 Arrow-shaped low bump
51 Arrow handle
52 Yajiri
53 Arc guide part 6 Elongated recess

Claims (5)

  A writing instrument body with a pen core holding part (13) at the tip of the shaft cylinder (11) whose base end is the ink cartridge insertion slot (12), and a pen core (14) that is self-priming of ink is inserted into this. (1) and an ink cartridge (2) filled with an ink storage body (22) in a cylindrical container (21) inserted into the shaft cylinder (11) of the writing instrument body (1). ) Ink cartridge insertion opening (12) is sealed by the tail plug (23) formed at the rear end of the ink cartridge (2) inserted into the shaft cylinder (11) and the pen of the writing instrument body (1). A writing instrument in which the base of the lead (14) is embedded in the ink occlusion body (22), the ink cartridge (2) on the inner surface of the shaft cylinder of the writing instrument body (1) and the outer surface of the cylindrical container of the ink cartridge (2). The fixed-side stopper (31) and the movable-side stopper (32) that can be detached from the writing instrument body (1) by rotating the ink cartridge (2). A writing instrument having a bayonet-type stopper mechanism comprising:   On the shaft cylinder (11) of the writing instrument body (1), the notch (15), (15) for finger pad intervention from the cartridge insertion opening (12) to the front is provided facing, while the ink cartridge ( 2) The outer surface of the cylindrical container (21) is narrower than the width of the notch (15) described above. When the ink cartridge (2) is inserted into the shaft cylinder (11), the notch (15 The writing implement according to claim 1, further comprising a finger pad portion (24) intervening inside.   A rod-shaped guide ridge (4) extending in the axial direction is provided on the inner surface of the shaft cylinder of the writing instrument main body (1), and its tip is used as a fixed side stopper (31), while the cylindrical container of the ink cartridge (2) An arrow-shaped low ridge (5) extending in the axial direction is provided on the outer surface, and the jaw end of the arrowhead (52) following the arrow handle (51) is the movable stopper (32). The writing instrument according to 2.   The tip of the arrowhead (52) is an arcuate guide (53) that points from the pointed end toward the movable stopper (32), and this is the process during which the ink cartridge (2) is inserted into the shaft cylinder (11). The writing instrument according to claim 3, wherein the arc-shaped guide portion (53) contacts the rear end of the rod-shaped guide ridge (4) to guide the ink cartridge (2) to be inserted into a fixed position in the shaft tube (11). . An elongated recess (6) for receiving the guide protrusion (4) of the writing instrument body (1) along the arrow handle (51) of the arrow-shaped low protrusion (5) is provided on the outer surface of the cylindrical container of the ink cartridge (2). Writing instrument in any one of claim | item 2 -4.

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