JP2012040755A - Pen nib - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pen nib that enables writing on a writing surface from any direction, enables a change in handwriting width by virtue of tool force applied during writing, allows each pen nib piece to move backward by virtue of tool force applied during writing, and enables a change in handwriting width, as with the pen nib of a fountain pen.SOLUTION: A pen body 6 is disposed on the circumference of a pen-body holding member 7 so as to be movable forward and backward. The pen body 6 has the plurality of pen nib pieces 3, each of which is flexible and has an ink outflow channel 5 at one its end and which converge toward their leading ends. The pen-body holding member 7 is attached to a shaft body 8, which is able to be connected to the leading end of a shaft cylinder storing ink and has an ink flow passage 11 and slits 16 communicating with the ink flow passage 11 and opening outward. A space 17 serving as an ink reservoir by virtue of capillary action is defined between the peripheral face of the pen-body holding member 7 around the slits 16 and the internal wall of each pen nib piece 3 around the ink outflow conduits 5. The pen body is elastically moved forward via an elastic body and is movable backward by virtue of tool force applied during writing.

Description

  The present invention relates to a pen tip in which a plurality of pen tip pieces are arranged in a ring shape, and the tips of the pen tip pieces are gathered so that the overall shape is tapered.

  Conventionally, as a pen tip that can be written on the writing surface from any direction, a plurality of pen tip pieces are arranged in an annular shape, and the tip of each pen tip piece is gathered so that the overall shape is tapered The destination is known.

  As a nib having such a structure, for example, disclosed in Japanese Patent Laid-Open No. 9-156279, a cylindrical base portion and one end thereof are continuously projected in a circular arc shape on the circumference of the shaft center. A nib base comprising a plurality of comb-like pieces formed by providing slit-like grooves between each other at equal intervals, and having a hemispherical division part that forms a hemispherical shape as a whole at the tip of each comb-like piece And a converging member that is formed into a cylindrical shape that can be fitted to the outer periphery of the nib basic body, and that presses a plurality of comb-like pieces toward the axial direction and converges. A structure in which a plurality of comb-like pieces of the nib base body are converged into a conical shape that gradually decreases in diameter toward the tip by fitting a converging member, and a hemispherical writing part is formed at the tip There are things.

  Japanese Patent Application Laid-Open No. 2003-335089 discloses a comb-like piece separated into a plurality of pieces which can be converged into a substantially conical shape gradually toward the tip, and these comb-like pieces can be arranged on the circumference. And a converging member capable of converging these comb-like pieces, and a structure in which a plurality of comb-like pieces are assembled by separate holding members and converging members is disclosed. .

  By the way, in the pen tip of the fountain pen, the tip is opened by the slit groove formed at the tip of the pen tip by the pressure at the time of writing, and the ink outflow constituted by the slit groove for discharging the ink to the writing surface such as a paper surface. Since the width of the path becomes wider, it is possible to change the handwriting width, but as described above, a plurality of pen tip pieces are arranged in a ring shape, and the tip of each pen tip piece has a tapered shape as a whole. In the pen tip assembled so that the ink outflow path for the ink to flow out to the writing surface is composed of gaps between the comb-like pieces (pen tip pieces), Since the amount of gap between each comb-like piece (pen nib piece) does not change much, the handwriting width did not change due to the writing pressure during writing unlike a fountain pen. Further, the pen tip having the above structure has a problem that there is no feeling of inflection because each pen tip piece does not retreat due to the writing pressure at the time of writing.

JP-A-9-156279 JP 2003-335089 A

  The present invention has been made in view of the above-mentioned facts, and in order to be able to write on the writing surface from any direction, a plurality of pen tip pieces are arranged in an annular shape, and the tip of each pen tip piece has a tapered shape as a whole. In the pen tip assembled so as to become, the pen tip piece is retracted by the writing pressure at the time of writing, and a pen tip with a feeling of inflection that can change the handwriting width like a pen tip of a fountain pen is obtained.

The present invention
“1. It has a plurality of pen tip pieces that can be bent on one end side, and the other end is a connecting portion that connects the rear end of each pen tip piece and extends in the axial direction to the tip portion of each pen tip piece. A pen body having an ink outflow path formed by a slit groove opened in the shaft is attached to a shaft body that can be connected to the tip of the shaft cylinder containing ink, and has a tapered front portion, A connecting portion on the outer periphery of the pen body holding member having an ink flow passage for flowing out the ink stored in the tip to the tip and a slit having one at the tip connected to the ink flow passage and the other opened outward. The pen tip pieces are arranged in a ring shape, the tips of the pen tip pieces are gathered so that the overall shape is tapered, and the front part of the pen body holding member is located in each pen tip piece. Capillary operation is made between the outer wall surface of the front part of the pen body holding member and the inner wall surface of each pen tip piece. Creates a space that becomes an ink reservoir and is arranged so that it can move back and forth with respect to the pen body holding member. The pen body is repelled forward by the elastic body and can be moved backward by the writing pressure during writing. A nib characterized by that.
2. In the front part of the pen body holding member, a contact part that contacts each pen tip piece is provided, and the outer diameter of the tip part of the part provided with the slit in front of the corresponding contact part is made larger than the outer diameter of the contact part. 2. The nib according to the item 1, wherein the nib has a small diameter. "
It is.

  In the present invention, the ink flow path formed in the pen tip holding member may be configured by a hole extending in the axial direction, and further by inserting a fibrous ink guide core or the like into the hole. Any configuration may be used as long as the ink accommodated in the shaft tube can surely flow out to the tip of the pen body holding member. Further, the number of slits formed at the tip of the pen body holding member may be one or the number of the pen tip pieces, and is not particularly limited. However, in order to allow ink to sufficiently accumulate in the space portion. It is preferable to provide three or more.

  In addition, the pen body is urged forward by an elastic body, but the pen body may be directly urged forward by an elastic body, or another member is connected to the pen body so as to be movable. The pen body may be biased forward by biasing the other member forward. The elastic body refers to a spring such as a coil spring, an elastic material such as rubber, or a bellows.

  Since the present invention has the structure as described above, it can be written on the writing surface from any direction, and the tip of each nib piece is opened by a slit groove by the writing pressure at the time of writing, so the width between each nib piece is widened and the handwriting width In addition, since the pen body moves backward due to the writing pressure at the time of writing, an intonation feeling at the time of writing can be felt.

  With the invention according to claim 2, even if the pen body is retracted due to the writing pressure at the time of writing, the outer wall surface of the front part of the pen body holding member and the pen tip which the ink outflow path of each pen tip piece opposes A space portion that becomes an ink reservoir portion can be always formed between the inner wall surface of the piece by capillary action.

It is the perspective view of the nib which showed the example of the nib of the present invention. FIG. 2 is a cross-sectional view of the main part showing an outline of an internal structure of a pen tip in FIG. FIG. 3 is an enlarged end view of the AA line portion in FIG. 2. It is a perspective view of the pen body in a present Example. In FIG. 2, it is a figure which shows the state which retracted the pen body with respect to the pen body holding member. FIG. 2 is a cross-sectional view of the main part showing an outline of the internal structure of the writing instrument, showing a specific example of the writing instrument equipped with the pen tip in FIG. FIG. 7 is a cross-sectional view of the main part showing an outline of the internal structure of the writing instrument, showing another specific example of the writing instrument equipped with the pen tip in FIG.

  The pen tip of the present invention has a plurality of pen tip pieces that can be bent at one end side, and the other end side is a connecting portion that connects the rear ends of the pen tip pieces, and an axial center is provided at the tip of each pen tip piece. A pen body having an ink outflow path formed by a slit groove extending in the direction and opened at the tip is arranged so as to be movable rearward by writing pressure at the time of writing, and is repelled forward through an elastic body. .

An embodiment of the nib of the present invention will be described with reference to FIGS. The nib 1 of this embodiment is
A slit groove having a plurality of nib pieces 3 on one end side through gaps 2 and connecting the other end side to a connecting portion 4 and extending in the axial direction at the tip of each nib piece 3 and opening at the tip. A flexible metal plate-shaped pen body 6 having an ink outflow path 5 formed in step 1, a pen body holding member 7 for holding the pen body 6 by arranging the pen tip pieces 3 in a circumferential shape, A cylindrical shaft body 8 that can be connected to the tip of a shaft cylinder (not shown) that stores ink, a coil spring 9 for repelling the pen body 6 in the forward direction, and a cylindrical moving body 10 are configured. ing.

  The pen body holding member 7 includes a main body portion 7a that can be inserted into the shaft body 8, a front portion 7b that is tapered in front and smaller in diameter than the outer diameter of the main body portion 7a, and a rear end (right side in FIG. 2). The pen body holding member 7 penetrates the pen body holding member 7 before and after the ink stored in the shaft tube flows out to the tip of the pen body holding member 7. An ink flow path 11 formed by the perforated holes is provided.

  The shaft body 8 includes a front inner portion 8a having an inner shape into which the main body portion 7a of the pen body holding member 7 can be inserted, and a front inner portion 8a into which the collar portion 7c of the pen body holding member 7 can be inserted. The pen body holding member 7 is inserted into the shaft body 8, the main body portion 7a is inserted into the front inner portion 8a, and the collar portion 7c is positioned in the rear inner portion 8b. Then, it is inserted in contact with the rear end of the front inside 8a.

  As shown in FIG. 4, the pen body 6 has the connecting portions 4 formed in a ring shape and the pen tip pieces 3 arranged in a circumferential shape. Each pen tip piece 3 is formed by gathering the tips of the pen tip pieces 3 so as to be deformed inward by a press or the like to have a substantially conical shape. As shown in FIG. 2, the pen body holding member 7 has a front portion 7 b positioned in each of the substantially conical pen tip pieces 3, and the pen body 6 has a front portion (see FIG. In FIG. 2, the connecting portion 4 is inserted in a loosely fitted state.

  A cylindrical moving body 10 is arranged on the outer periphery of the connecting portion 4 inside the shaft body 8 so as to be movable back and forth with respect to the shaft body 8 and the pen body holding member 7. The movable body 10 is provided with a spring receiving portion 12 protruding inward, and a front end surface 12 a of the spring receiving portion 12 is in contact with the rear end of the connecting portion 4 of the pen body 6. A guide projection 13 is fixed to the inner wall surface of the moving body 10 in front of the spring receiving portion 12 with an adhesive or the like, and the guide projection 13 is provided in a locking hole 14 ( 4 (see FIG. 4), penetrating the pen body 6 and projecting to the pen body holding member 7, and engaging with a guide groove 15 provided on the outer peripheral surface of the pen body holding member 7 extending in the axial direction. is there. With such a structure, the pen body 6 and the moving body 10 can move back and forth without coming out of the pen body holding member 7 and without rotating with respect to the pen body holding member 7.

  Further, a coil spring 9 is stretched between the spring receiving portion 12 of the moving body 10 and the collar portion 7c of the pen body holding member 7, and the pen body 6 and the moving body 10 are moved in the forward direction (left side in FIG. 2). It has been bulleted.

  The front end portion 7ba of the front portion 7b of the pen body holding member 7 is provided with three slits 16 communicating with the ink flow passage 11 and extending radially in the axial radial direction and opening outward. Further, a space 17 serving as an ink reservoir is formed between the outer wall surface around the slit 16 of the pen body holding member 7 and the inner wall surface around the ink outflow path 5 of each pen tip piece 3 by capillary action. In addition, a contact portion 18 is provided on the front portion 7b so that the outer wall surface of the front portion 7b contacts the inner wall surface of each pen tip piece 3 behind the slit 16 (rightward in FIG. 2). The outer diameter of the tip portion 7ba of the front portion 7b of the portion provided with is smaller than the outer diameter of the contact portion 18.

  In the present embodiment, the shaft body 8 is provided with a female screw portion 19 so that it can be detachably mounted on the shaft tube to which the pen tip 1 of the present embodiment is mounted. The internal structure and the like and the mounting structure with the shaft cylinder are not limited.

  The pen nib 1 of this embodiment flows out the ink accommodated in the shaft tube through the ink flow passage 11 formed in the pen body holding member 7 to the tip end portion 7ba of the pen body holding member 7 and through the slit 16. Ink accumulates in the space 17, and the ink is sufficiently supplied to the tip of the pen body 6 through the ink outflow path 5. Further, the pen body 6 moves backward as shown in FIG. 5 by the writing pressure at the time of writing, and the pen body 6 is elastically moved forward by the coil spring 9 via the moving body 10 (left side in FIG. 5). In addition, since the amount of retraction of the pen body changes depending on the strength of the writing pressure, the feeling of inflection at the time of writing can be felt like a pen tip of a fountain pen.

  Next, a specific example of the writing instrument equipped with the nib 1 according to the present embodiment will be briefly described with reference to FIGS. 6 and 7. The writing instrument 101 shown in FIG. (Not shown) has a structure in which the shaft cylinder 102 is directly accommodated, and the inside of the shaft cylinder 102 serves as an ink containing portion 103. At the tip of the shaft cylinder 102, an ink outflow groove that opens and communicates with the comb groove 104 at the front and rear ends. A pen core 105 (not shown) is mounted via a pen core holding member 106. The nib 1 is connected to the shaft tube 102 by screw fitting, the front end of the pen core 105 is brought into contact with the rear end of the collar portion 7C of the pen body holding member 7, and the ink outflow groove and ink of the pen core 105 are contacted. By connecting the flow passage 11, ink can be supplied to the tip of the pen body 6.

  In the writing instrument 201 shown in FIG. 7, for example, the shaft cylinder 202 to which the pen tip 1 is attached has an ink outflow groove (not shown) that opens and communicates with the comb groove 203 at the front and rear ends, and ink at the rear end. When the cartridge 204 is inserted, a protrusion 205 that protrudes rearward (to the right in FIG. 5) to open the opening by shifting a lid (not shown) that closes the opening for preventing ink outflow. A pen core 206 having a pen core 206 mounted thereon via a pen core holding member 207, and a rear end of the front shaft 202a are detachably connected by screw fitting. The rear end is closed and the pen core 206 is closed. And a rear shaft 202b having a storage chamber 208 that can store the ink cartridge 204 inserted into the rear shaft 202b. In order to insert the pen nib 1 on the front shaft 202a, the front end of the pen core 206 mounted on the front shaft 202a is brought into contact with the rear end of the collar portion 7C of the pen body holding member 7, so that the pen core 206 The ink can be supplied to the tip of the pen body 6 by communicating the ink outflow groove with the ink flow passage 11.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a non-directional pen tip that can be written on the writing surface from any direction and to have a structure in which the pen body can be moved backward by the writing pressure at the time of writing.

DESCRIPTION OF SYMBOLS 1 Pen tip 3 Pen tip piece 4 Connection part 5 Ink outflow path 6 Pen body 7 Pen body holding member 8 Shaft body 9 Coil spring 10 Moving body 11 Ink flow path 16 Slit 17 Space part 18 Contact part

Claims (2)

  It has a plurality of pen tip pieces that can be bent at one end side, and the other end side is a connecting portion that connects the rear end of each pen tip piece, and extends in the axial direction to the tip end portion of each pen tip piece and opens at the tip end. A pen body having an ink outflow path formed by a slit groove is attached to a shaft body that can be connected to the tip of a shaft cylinder that stores ink, and has a tapered front portion and is accommodated in the shaft cylinder. On the outer periphery of the pen body holding member that has an ink flow passage for flowing ink to the tip and a slit that opens one end to the ink flow passage at the tip and opens the other outward, the connecting portion is made annular Each pen tip piece is arranged in an annular shape, the tip of each pen tip piece is assembled so that the overall shape is a tip, and the front part of the pen body holding member is located in each pen tip piece, Capillary action between the outer wall surface of the front part of the pen body holding member and the inner wall surface of each pen tip piece facing the ink outflow path of the tip piece. It forms a space that becomes an ink reservoir and is arranged so that it can move back and forth with respect to the pen body holding member, and the pen body is repelled forward by an elastic body and can be moved backward by writing pressure during writing. A nib characterized by that.   In the front part of the pen body holding member, a contact part that contacts each pen tip piece is provided, and the outer diameter of the tip part of the part provided with the slit in front of the corresponding contact part is made larger than the outer diameter of the contact part. The nib according to claim 1, wherein the nib has a small diameter.

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