JP6828305B2 - Writing implements - Google Patents

Description

The present invention relates to a writing instrument in which a writing core embodying a function for writing is housed in a shaft cylinder.

Ballpoint pens and mechanical pencils are well known as typical examples of this type of writing instrument. A ballpoint pen is a refill in which a writing mechanism that holds a ball for transferring ink to paper or the like is attached to the tip of a container filled with ink and is housed in a shaft as a writing core. The writing mechanism is the shaft. It protrudes from the tip of the cylinder. Mechanical pencils have a built-in mechanism for drawing out the pencil lead, which is the writing lead.

The shape of the shaft tube held by the user's fingers is usually cylindrical, but there are also those that have a hexagonal cross-sectional view like a traditional pencil and those that have a triangular cross-sectional view ( For example, see Non-Patent Document 1 and Patent Document 1 below). Further, a flat surface or a recess for fitting the user's fingers may be formed at a predetermined portion on the outer circumference of the cylindrical shaft cylinder (see, for example, Patent Documents 2 and 3 below).

A clip for hanging the writing instrument on a pocket of clothes, paper leaves, a cover of a file, a board, etc. is often provided at the rear of the barrel of the writing instrument (Non-Patent Documents 1 and 2 below). See 3). When the user grips the writing instrument, this clip may hit the back of the user's hand, the base of the thumb or index finger, causing discomfort to the user. In particular, when a finger guiding portion for guiding the user's fingers to come into contact is provided on the outer circumference of the barrel, such as a flat surface or a recess, the user can attach a specific finger to the finger guiding portion. As a result, the posture and relative position of the barrel with respect to the fingers are regulated. The size of the fingers and the way to hold the writing instrument are different for each person, and it depends on the person whether the dominant hand holding the writing instrument is left or right when writing. Therefore, even if the clip does not interfere with the hand in one user, there is a concern that the clip interferes with the hand in another user and hinders smooth writing.

Jikkenhei 07-042326 Japanese Patent Application No. 2015-238897 Japanese Unexamined Patent Publication No. 2005-138420

"Ballpoint Pen / Composite Pen / Mechanical Pencil / Pencil Sharp", KOKUYO General Catalog 2016 Edition Stationery, KOKUYO Co., Ltd., December 2015, p. 600,602,604-606

In the present invention, when a finger guiding portion for guiding the user's fingers to come into contact with the outer circumference of the barrel of the writing instrument is provided, the relative positional relationship between the finger guiding portion and the clip is adjusted to the user's preference. The intended purpose is to be able to change.

In order to solve the above-mentioned problems, in the present invention, a shaft cylinder having a clip arranged at the rear portion and a shaft cylinder fitted to the outer circumference of the shaft cylinder to cover the front portion of the shaft cylinder, and the user's fingers on the outer peripheral surface. A grip having a flat surface or a convex curved surface or a recess formed close to a flat surface at a portion in contact with the grip is interposed between the shaft cylinder and the grip, and the grip is placed at a plurality of positions around the shaft center with respect to the shaft cylinder. writing implement rotationally fixed positioning comprises an engaging structure that allows changing the relative position between the clip and the finger guiding section by selecting the axial center of the attitude to barrel grip from a plurality Was configured.

Then, by the engaging structure, the grip is positioned with respect to the barrel so that the flat surface or the convex curved surface or the recess close to the flat surface and the clip are aligned in a straight line along the axial direction. It is also preferable that the convex curved surface or the recess and the clip can be positioned so as not to be aligned in a straight line along the axial direction.

The engaging structure is, for example, a convex portion formed on one of the outer circumference of the barrel and the inner circumference of the grip and protruding toward the other side, and the convex portion formed on the other side and recessed so as to separate from the other side. The element is a plurality of recesses that can be engaged with each other.

The convex portion may be a ridge extending along the axial direction, and the concave portion may be a concave groove extending along the axial direction.

According to the present invention, when a finger guiding portion for guiding the user's fingers to come into contact with the outer circumference of the barrel of the writing instrument is provided, the relative positional relationship between the finger guiding portion and the clip can be adjusted to the user's preference. It is possible to change it accordingly.

The perspective view of the writing instrument of one Embodiment of this invention. An exploded perspective view of the writing instrument of the same embodiment. Exploded view including the vertical section of the grip of the writing instrument of the same embodiment. A side view of the writing instrument of the same embodiment. A cross-sectional view taken along the line AA of the writing instrument of the same embodiment. A side view of the writing instrument of the same embodiment. BB line cross-sectional view of the writing instrument of the same embodiment. A side view of the writing instrument of the same embodiment. A cross-sectional view taken along the line CC of the writing instrument of the same embodiment.

An embodiment of the present invention will be described with reference to the drawings. The writing instrument of the present embodiment shown in FIGS. 1 to 9 is a rear end knock type ballpoint pen. This writing instrument has a writing core that embodies a function for writing, a shaft cylinder 1 that is held by the user's fingers when the user writes, and a knock bar arranged on the rear end side of the shaft cylinder 1. A knock mechanism is provided in which the writing tip 2, that is, the tip portion of the writing core is recessed from the front end (tip) side of the barrel 1 by knocking operation of 3. The shaft cylinder 1 houses the writing core and the knock mechanism inside.

The writing core is a refill in which a writing mechanism portion 2 having a ball for transferring ink to paper or the like is attached to a tip portion of a container filled with ink. The knock mechanism causes the writing mechanism portion 2 which is the tip of the writing to protrude from the barrel 1 when the knock rod 3 is pressed, and the writing mechanism portion 2 which protrudes from the barrel 1 when the knock rod 3 is pressed again. It is a conventionally known Khan type knock mechanism that is immersed in the shaft cylinder 1.

The shaft cylinder 1 is a hollow tubular hard resin member stretched along the L direction of the shaft center so that the writing core can be inserted therein. A clip 4 is integrally molded on the rear portion of the barrel 1. The clip 4 has a thin plate shape in which the rear end (base end) portion is joined to the vicinity of the rear end of the barrel 1 and extends forward from there. The inward surface of the clip 4 and the outer peripheral surface of the barrel 1 face each other with a distance. The front end (tip) portion of the clip 4 is provided with a protrusion protruding toward the barrel 1. The protrusion abuts or approaches the outer peripheral surface of the barrel 1. When hanging a writing instrument on a pocket of clothes, paper leaves, a cover of a file, a board, or the like, the clothes or the like are inserted into the gap between the barrel 1 and the clip 4, and the clothes or the like are sandwiched between them. It is also possible to arrange the clip 4 at the rear part of the shaft cylinder 1 by integrally molding such a clip 4 not with the shaft cylinder 1 but with the knock rod 3 protruding from the shaft cylinder 1.

The axle cylinder 1 has a rear shaft 11 extending along the axis L direction and a front shaft 12 extending in front of the rear shaft 11 and extending along the axis L direction, and is outside the front shaft 12. The diameter is slightly smaller than the outer diameter of the rear shaft 11. Then, the outer circumference of the front shaft 12 is covered with a grip 13 which is an exterior material that comes into direct contact with the user's fingers.

The grip 13 is a hollow tubular soft resin (or elastomer) member that is stretched along the axis L direction so that it can be fitted to the front shaft 12 and cover the front portion of the shaft cylinder 1. When the grip 13 is attached to the outer circumference of the front shaft 12 by inserting the front shaft 12 into the grip 13, the end face on the rear end side of the grip 13 is the front end of the rear shaft 11 having a larger outer diameter than the front shaft 12. Contact the end face on the side. Then, the outer peripheral surface of the front end portion of the cylindrical rear shaft 11 and the outer peripheral surface of the rear end portion of the cylindrical grip 13 having the same diameter are substantially flush with each other, and both form a continuous outer surface.

The outer peripheral surface of the rear shaft 11 has a cylindrical shape as a whole except for the portion of the clip 4. On the other hand, the outer peripheral surface of the grip 13 has a single flat surface region 131 and a curved surface region 132 that is a region other than the flat surface region 131. The flat surface region 131 functions as a finger guiding portion that guides the user's fingers so as to come into contact with them. That is, the flat surface region 131 is located on the outer peripheral surface of the grip 13 and is in contact with the user's fingers, and has a substantially flat surface shape extending parallel to or substantially parallel to the axis L direction. As shown in the cross-sectional view of FIG. 5, FIG. 7 or FIG. 9, in the present embodiment, the flat surface region 131 is not a completely flat surface, but from the axis L of the outer side (shaft cylinder 1 (or writing tool)). It is a convex curved surface that slightly bulges toward the direction of separation). A convex curved surface is a curved surface in which a line segment connecting any two points on the curved surface by the shortest path along the curved surface is outside the straight line connecting the two points or is equal to such a straight line. Say. In short, the convex curved surface is a curved surface having no recessed recess toward the axis L of the barrel 1. However, the flat surface region 131 may be formed into a completely flat surface.

The curved surface region 132 on the outer peripheral surface of the grip 13 is a curved surface having a larger curvature than the flat surface region 131. The curved surface region 132 is substantially flush with the outer peripheral surface of the rear shaft 11. However, as shown in FIG. 4, the intermediate portion of the grip 13 in the front-rear direction parallel to the axis L bulges outward so that the outer diameter is slightly larger than that of the rear shaft 11.

The dimension of the front shaft 12 along the axis L direction is longer than the dimension of the grip 13 along the axis L direction. Therefore, when the grip 13 is attached to the front shaft 12, the front end portion of the front shaft 12 protrudes forward from the front end of the grip 13. A male screw 122 is cut on the outer circumference of the front end portion of the front shaft 12. On the other hand, a female screw is formed on the inner circumference of the base 14, and the base 14 can be screwed to the front end portion of the front shaft 12 by screwing the female screw into the male screw 122. When attaching the base 14 to the front shaft 12, the brush tip 2 is inserted into the coil spring 21 which is an element of the knock mechanism in advance so that the coil spring 21 fits in the base 14.

The base 14 is a tapered metal member whose diameter decreases toward the front, and constitutes a front end portion of the shaft cylinder 1. The writing mechanism portion 2 of the writing core protrudes from the base 14. When the grip 13 is attached to the outer circumference of the front shaft 12 and the base 14 is further screwed to the front end of the front shaft 12, the end face on the front end side of the grip 13 is behind the base 14 having a larger outer diameter than the front shaft 12. It abuts on the end face on the end side. Then, the outer peripheral surface of the front end portion of the cylindrical grip 13 and the outer peripheral surface of the rear end portion of the conical base 14 having the same diameter are substantially flush with each other, and both form a continuous outer surface.

In the writing tool of the present embodiment, as shown in FIGS. 4 and 5, the grip 13 can be positioned so that the flat surface region 131 and the clip 4 are aligned in a straight line along the L direction of the axis. Further, as shown in FIGS. 6 and 7 or 8 and 9, the grip 13 can be positioned so that the flat surface region 131 and the clip 4 are not aligned in a straight line along the L direction of the axis. In short, the grip 13 can be rotated around the axis L with respect to the barrel 1 to arbitrarily change the position or orientation of the flat surface region 131.

A convex portion 121 protruding outward toward the grip 13 is formed on the outer circumference of the front shaft 12 of the shaft cylinder 1. The convex portion 121 is an elongated ridge extending parallel to the axis L. The rear end of the convex portion 121 reaches the front end surface of the rear shaft 11 or its vicinity. On the other hand, a plurality of recesses 133 that are recessed outward so as to separate from the front shaft 12 are formed on the inner circumference of the grip 13. The recesses 133 are elongated recesses extending parallel to the axis L, and are intermittently arranged along the circumferential direction centered on the axis L. As shown in FIG. 5, the angle α formed by the two line segments connecting each of the two adjacent recesses 133 and the axis L is preferably set in the range of 15 ° to 30 °. In the illustrated example, the angle α is about 22 °. The rear end of the recess 133 reaches the rear end surface of the grip 13 and opens to the rear end surface of the grip 13. The length of the concave portion 133 along the axial center L direction is equal to or slightly longer than the length of the convex portion 121 along the axial center L direction.

In order to change the position of the flat surface region 131 in the shaft cylinder 1 of the writing instrument by rotating it around the axis L, the base 14 is detached from the front end of the front shaft 12 and then attached to the front shaft 12. The grip 13 is displaced forward relative to the front shaft 12 by pulling out the front shaft 12 from the grip 13, and the engagement between the concave portion 133 and the convex portion 121 is released. Then, the grip 13 is rotated about the axis L relative to the front shaft 12, and the posture or orientation of the grip 13 is operated so that the positions of any one of the concave portions 133 and the convex portions 121 are aligned. After that, the grip 13 is displaced rearward relative to the front shaft 12 so as to insert the front shaft 12 into the grip 13, and the grip 13 is reattached to the front shaft 12 while engaging the convex portion 121 with the concave portion 133. Mounting. Finally, the base 14 is screwed onto the front end of the front shaft 12. As a result, the grip 13 is fixed to the front shaft 12.

In the present embodiment, the axle cylinder 1 having the clip 4 arranged at the rear portion and the portion of the outer peripheral surface where the user's fingers come into contact with the axle cylinder 1 are fitted to the outer circumference of the axle cylinder 1 to cover the front portion of the axle cylinder 1. A flat surface or a convex curved surface 131 close to a flat surface is formed as a finger guiding portion, and the grip 13 is interposed between the shaft cylinder 1 and the grip 13, and the grip 13 is centered L with respect to the shaft cylinder 1. A writing tool having an engaging structure that enables the posture of the grip 13 around the axis L with respect to the barrel 1 to be selected from a plurality of positions by non-rotatably positioning at a plurality of rotational positions. did. Specifically, the engaging structure includes a convex portion 121 formed on the outer circumference of the barrel 1 and protruding toward the grip 13, and a convex portion 121 formed on the inner circumference of the grip 13 and recessed so as to separate from the barrel 1. The element is a plurality of recesses 133 with which the portion 121 can be engaged.

According to the present embodiment, when a flat surface or a convex curved surface 131 close to a flat surface is formed on the outer periphery of the barrel 1 of a writing instrument, the relative positional relationship between the flat surface or the convex curved surface 131 and the clip 4 is used. It is possible to change it according to the preference of the person. In particular, the grip 13 can be positioned with respect to the barrel 1 so that the flat surface or the convex curved surface 131 close to the flat surface and the clip 4 are aligned in a straight line along the L direction of the axis. In addition, the convex curved surface 131 and the clip 4 which are flat or close to the flat surface in the side view can be positioned so as not to be aligned in a straight line along the axial direction. Therefore, it is possible to adjust the posture or orientation of the grip 13 according to the gripping method of the writing instrument of the user, the dominant hand of the user, and the like, and effectively avoid the problem of interference between the fingers of the user and the clip 4. ..

The present invention is not limited to the embodiments described in detail above. For example, the mode of writing instruments is not limited to ballpoint pens. In other words, the writing core is not always a refill of a ballpoint pen. Even when the writing instrument is a pen of a type other than a ballpoint pen (for example, a felt-tip pen, etc.), the writing core is provided with a mechanism for transferring the ink to paper or the like at the tip of the container filled with ink. The mechanism is the tip of the brush. Alternatively, when the writing instrument is a mechanical pencil, the writing core is a pencil core, and a mechanism for extending the writing core and projecting it from the tip of the shaft cylinder is housed in the shaft cylinder together with the writing core.

In the above embodiment, a single flat surface region 131 is provided on the outer peripheral surface of the grip 13 as the finger guiding portion, but a plurality of flat surface regions can also be provided. The outer peripheral surface of the grip 13 may be provided with a recess that is recessed toward the axis L of the barrel 1 together with the flat surface region 131 or instead of the flat surface region 131. Such a depression can also function as a finger guide that guides the user's fingers into contact with it. In addition, the flat surface region 131 and / or the curved surface region 132 on the outer peripheral surface of the grip 13 has irregularities having a width and a diameter of 1 mm or less, which are remarkably finer than the thickness of the user's finger and the size of the finger node. It does not prevent the provision of grooves, holes, etc.

The finger guiding portion provided on the outer peripheral surface of the grip is not limited to a flat surface or a convex curved surface or a concave portion close to a flat surface. The finger guiding portion may be a mark for visually guiding the user's fingers, such as a mark or character attached to the outer peripheral surface of the grip, or an area having a color different from that of other parts. Alternatively, the material or material forming the outer peripheral surface of the grip may be different between the finger guiding portion and the other portion to tactilely guide the user's fingers to the finger guiding portion.

In the above embodiment, the convex portion 121 is a ridge extending along the axial center L direction, and the concave portion 133 is a concave groove extending along the axial center L direction, but the convex portion and the concave portion are the axial centers, respectively. It does not always extend along the L direction.

Further, a convex portion is formed on the inner circumference of the grip 13 so as to project toward the shaft cylinder 1, and a plurality of concave portions 133 that are recessed on the outer circumference of the shaft cylinder 1 so as to separate from the grip 13 and to which the convex portion can engage are formed. It is also permissible to form and form an engaging structure with these protrusions and recesses.

In addition, the specific configuration of each part can be variously modified without departing from the spirit of the present invention.

The present invention can be applied to a writing instrument in which a writing core embodying a function for writing is housed in a shaft cylinder.

1 ... Shaft cylinder 121 ... Convex part 13 ... Grip 131 ... Finger guide part (flat surface or convex curved surface close to flat surface)
4 ... Clip L ... Axis

Claims (5)

A barrel with a clip on the back and
A grip provided with a finger guiding portion that fits on the outer circumference of the barrel to cover the front portion of the barrel and guides the user's fingers to come into contact with the outer peripheral surface.
Interposed between the grip and the barrel, and rotationally fixed positioning of the grip with respect to the shaft tube at a plurality of positions of the axial center, from the axial center of the attitude to the barrel of the grip of a plurality A writing tool having an engaging structure capable of changing the relative position between the finger guiding portion and the clip by selecting it. The writing tool according to claim 1, wherein as the finger guiding portion, a flat surface or a convex curved surface or a recess close to a flat surface is formed on the grip at a portion of the outer peripheral surface where the user's fingers come into contact. With the engaging structure, the grip can be positioned with respect to the barrel so that the side view finger guiding portion and the clip are aligned in a straight line along the axial direction, and the side view finger guidance. The writing tool according to claim 1 or 2, wherein the portion and the clip can be positioned so as not to line up in a straight line along the axial direction. The engaging structure has a convex portion formed on one of the outer circumference of the barrel and the inner circumference of the grip and protruding toward the other side, and a concave portion formed on the other side so as to be separated from the other side. The writing tool according to claim 1, 2 or 3, wherein a plurality of recesses that can be fitted are used as elements. The writing tool according to claim 4, wherein the convex portion is a ridge extending along the axial direction, and the concave portion is a concave groove extending along the axial direction.

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