JP2013223972A - Writing instrument refill and writing instrument housing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing instrument refill made of metal, which can be attached without applying a special processing on the refill holding part of the writing tool, whichever the shape of the refill holding shape is cylinder-like or protruding, and to provide a writing instrument housing the same therein.SOLUTION: In a writing instrument refill 1, according to the number of the refill holding parts of the writing instrument, one or more of the writing instrument refill are housed in the shaft tube. The writing instrument refill includes a cylinder-shape housing part 2 housing a pencil lead and ink therein and a pen tip 3, and the rear parts thereof are held in the refill holding parts in a detachable manner. The cylinder-shape housing part 2 has the pen tip 3 on its front end and an opening 21 on its rear end. The outer surface adjacent to the opening is made a convex part 22 by plastic deformation, thereby forming on the inside surface a diameter-reduced part 23 where the inner diameter of the cylinder-like housing part is narrowed, and also forming a swelling part 24 on the outer surface adjacent to the convex part 22. The writing instrument houses the writing instrument refill 1 held by the refill holding part.

Description

  The present invention relates to a writing instrument refill and a writing instrument containing it. More specifically, the present invention relates to a writing instrument refill having a metal writing body container and a writing instrument that houses it.

Conventionally, writing instruments such as a ballpoint pen refill and a mechanical pen refill that can be exchangeably accommodated are widely used. In this type of writing instrument, the vicinity of the rear end of the refill accommodated in the shaft cylinder and the refill holding part in the writing instrument are detachably held by fitting or clamping (for example, Patent Documents 1 to 3). reference).
Patent Documents 1 and 2 are cylindrical objects in which the refill holding portion is made of a metal pipe, and a writing instrument that is held by inserting the refill into the pipe (Patent Document 1 is a cap that accommodates a single refill. The type writing instrument, Patent Document 2 is a rotary feeding type writing instrument that accommodates a plurality of refills. Both of these process a specific part of the metal pipe that will be the refill holding part, and by forming a locking part on the inner surface, the rear part of the writing instrument refill inserted into the metal pipe is sandwiched by the locking part. ing.

  Further, in the writing instrument of Patent Document 3, the refill holding part is a protrusion formed at the front end of a sliding lever (slider), and the protrusion is fitted into the opening at the rear end of the refill. It is a writing instrument. The protruding portion is a spherical connecting portion having a size corresponding to the inner diameter of the opening, and the rear portion of the writing instrument refill is fitted and held by the connecting portion.

  In any of the above-mentioned writing tools, only the writing tool refill of a specific shape (that is, the shape behind the refill, the inner diameter, the outer diameter, etc.) is held. It was necessary to process into a simple shape, and it was necessary to manufacture a plurality of types of writing instrument refills to be applied to writing instruments of each structure.

JP 2002-274092 A Japanese Patent Laid-Open No. 5-95785 JP-A-8-267988

In the present invention, even if the shape of the refill holding portion provided in the writing instrument is either cylindrical or protruding, it can be attached to the refill holding portion without any special processing. The present invention provides a highly versatile metal writing instrument refill that can be widely applied to writing instruments and a writing instrument that accommodates them.
In the present invention, “front” indicates the pen tip side, and “rear” indicates the refill holding unit side connected when the writing instrument is accommodated.

The present invention is a writing instrument refill in which one or two or more are accommodated in a shaft tube in accordance with the number of refill holding parts of the writing instrument, and the rear is detachably held by the refill holding part. Is composed of a metal cylindrical housing portion and a pen tip containing a pencil lead and ink, and the cylindrical housing portion has a pen tip at the front end and an opening portion at the rear end, and an outer surface in the vicinity of the opening portion. It is a requirement that the inner diameter of the cylindrical housing portion is narrowed and the bulging portion is formed on the outer surface in the vicinity of the concave portion.
Further, it is a requirement that the recess is a plurality of recesses formed at equal intervals in the circumferential direction or an annular recess continuous in the circumferential direction, and the cylindrical housing portion is a stainless steel pipe.
Furthermore, the writing instrument refill according to any one of the above is required as a writing instrument that is held and accommodated by a refill holding part, and the refill holding part has a protrusion or a cylindrical accommodating part that can be inserted into the opening of the cylindrical accommodating part. It is a requirement that the cylinder be insertable.

  According to the present invention, since the diameter-reduced portion accompanying plastic deformation can be formed on the inner surface and the bulging portion is formed on the outer surface with a single processing with respect to the metal cylindrical housing portion, the shape of the refill holding portion of the writing instrument is cylindrical. Any of the protrusions can be attached to these refill holding portions without any special processing. For this reason, a highly versatile writing instrument refill that can be widely applied to writing instruments of various structures and a writing instrument that accommodates it.

It is sectional drawing which shows an example of the writing instrument refill of this invention. It is the principal part enlarged view (a) of FIG. 1, and AA sectional drawing (b) (a recessed part inner surface is abbreviate | omitted). It is sectional drawing of the writing instrument which accommodates the writing instrument refill of FIG. It is a principal part enlarged view of FIG. It is a principal part enlarged view in the writing instrument of another example.

Embodiments of the writing instrument refill 1 and the writing instrument 7 that accommodates it will be described with reference to the drawings, but the present invention is not limited to these.
The writing instrument refill 1 according to the first embodiment and the writing instrument 7 containing the refill 1 are shown in FIGS.

  The writing instrument refill 1 shown in FIGS. 1 and 2 has a ball pen tip (pen nib 3) in which a ball is rotatably held at the front end, and a spring body that presses the ball forward, and the ball pen tip at the front end. And a cylindrical housing portion 2 made of a metal pipe having an open rear end. The cylindrical housing portion 2 and the pen tip 3 are connected by a holder 4 which is a resin connecting member having transparency. ing.

The cylindrical housing portion 2 is a portion in which a writing body such as a pencil lead or ink for forming a handwriting is built, and is constituted by a metal pipe (stainless pipe in this embodiment) made of stainless steel, brass, or the like. . In this embodiment, the water-based ink 5 is incorporated as a writing body, and an ink follower 6 is disposed in contact with the rear end of the ink 5.
A pen tip 3 is provided at the front end opening of the cylindrical housing portion 2, and the rear end opening is an opening 21 for connecting to the writing instrument 7. The outer surface in the vicinity of the opening 21 is formed with a convex portion on the inner surface by forming a concave portion 22 in a punch shape, a knurled shape or the like (multiple locations in the circumferential direction or continuous depressions), and is cylindrically accommodated. A reduced diameter portion 23 in which the inner diameter of the portion 2 is narrowed is formed. Further, by forming the reduced diameter portion 23, a bulging portion 24 having an outer diameter D2 larger than the outer diameter D1 before deformation is formed in the vicinity of the concave portion 22 on the outer surface of the cylindrical housing portion.
In this embodiment, by forming two pairs of dents (four recesses 22 in total shown in FIG. 2) that are opposed to each other in the radial direction, the rear side of the stainless steel pipe having the outer diameter D1 is plastically deformed. A bulging portion 24 is formed. In addition, the cross-sectional shape (FIG. 2b) of the virtual circle which makes the said bulging part 24 the largest outer diameter D2 is larger than the pipe outer diameter D1 before plastically deforming.
Particularly, in the plastic deformation portion, the depth of the concave portion 22 and the protruding amount of the bulging portion 24 are adjusted according to the shape and size of the refill holding portions 93 and 95 of each writing instrument. In that case, it is preferable to adjust so that the cross-sectional outer diameter D2 of the said bulging part 24 part may become larger in the range of 0 to 2% than the internal diameter of the pipe-shaped refill holding | maintenance part 95 connected at the time of writing instrument accommodation. In the above-mentioned range, it does not easily come off in the connected state, and it does not feel poor insertability or difficulty in removal when replacing the refill.

The nib 3 is a ball-point pen tip, which is obtained by holding a cemented carbide ball in a ball holding portion formed by cutting a metal material with a drill or the like and biasing the ball forward by a spring body. It is.
Furthermore, as a ball-point pen tip, a tip formed by holding a ball in a ball holding portion in which the vicinity of the tip of a metal pipe is pressed and deformed inward from the outer surface, or a resin ball holder inside a metal or plastic tip A chip provided with a seat, or a ball that is held by each chip and urged forward by a spring body can also be applied.
It is also possible to use a marking pen tip, for example, a conventional general-purpose porous member such as a resin processed body of a fiber, a fusion processed body of a heat-meltable fiber, a felt body, and the front end is a bullet-shaped, It is processed into a shape according to the purpose, such as a rectangular shape or a chisel shape, and provided for practical use.
Furthermore, a chuck body (pencil lead holding part) can be used at the pen tip by interposing a mechanical pencil unit.

The pen nib 3 is connected to the front end opening of the cylindrical container 2 via a transparent holder 4 made of polypropylene resin, so that the remaining amount of ink contained can be visually confirmed. In addition, by using a holder colored in the same color as the hue of the built-in ink, the hue of the built-in ink can be confirmed by visually observing the holder.
The ball-point pen tip 3 can be directly attached and fixed to the front end opening of the cylindrical housing 2 by press fitting or the like.

The cursive contained in the cylindrical container 2 is selected from a low-viscosity water-based ink, a low-viscosity oil-based ink, a high-viscosity oil-based ink, an emulsion ink, etc. in addition to a water-based gel ink having shear thinning viscosity. A solid core such as a pencil core or a colored wax body is used according to the ink 5, the ink occlusion body and the flow rate adjusting member for holding each ink, and the refill mechanism. Further, when the ink 5 is accommodated, an ink follower 6 made of a high-viscosity fluid that moves forward with the consumption of the ink 5 is contact-filled at the rear end of the ink 5 as necessary, and further the high viscosity. A solid follower can be used together with the fluid.
As the colorant applied to the ink, any of general-purpose dyes, pigments, metallic glossy pigments, fluorescent pigments, titanium oxide, thermochromic materials, photochromic materials, and the like can be used.
In this embodiment, a water-based gel ink having shear thinning viscosity and a liquid ink follower 6 are disposed at the rear end.

A writing instrument 7 containing the writing instrument refill 1 is shown in FIGS. Note that the writing instrument 7 of the present embodiment is a multi-core writing instrument that accommodates three writing instrument refills 1 each containing ink 5 having a different hue.
Specifically, a plurality of (specifically three) writing instrument refills 1 (for example, any of the above-mentioned ball pen refills, marking pen refills, mechanical pencil refills, etc.) can be moved in the axial direction in the shaft cylinder 8. Is housed in. Each writing instrument refill 1 is urged rearward by a resilient member 10 made of a compression coil spring.
In addition, the number of the writing instrument refills 1 accommodated in the shaft cylinder 8 may be two or more, and specifically, two, three, four, five, six, etc. may be mentioned. Also in this case, it is preferable that they are arranged at equal intervals on the same circumference centered on the axis when viewed in cross section. Moreover, when storing one by itself, the writing implement of another structure can be applied.

The shaft cylinder 8 is screwed into a front shaft 81 that is a cylindrical body in which a tip opening 84 that can project the pen tip 3 of the writing instrument refill 1 extends in the axial direction, and a rear end portion of the front shaft 81. It is constituted by a cylindrical rear shaft 82 attached by press fitting.
The shaft cylinder 8 is formed of a synthetic resin such as polycarbonate, polyethylene, or ABS, or a metal (in this embodiment, an injection molded product of polycarbonate resin).

A plurality of (specifically, three) elongated window holes 83 extending in the front-rear direction are provided in the rear side wall of the rear shaft 82 in the radial direction. The three window holes 83 are formed at equal positions in the radial direction with respect to the axis.
Further, a locking step portion 85 made of a rib or the like extending in the front-rear direction is provided on the inner surface of the side wall between the window holes 83, and the writing instrument refill 1 is moved to the rear end of the sliding body 9 when the pen tip 3 protrudes. It is comprised so that it may be locked by.

The three writing instrument refills 1 accommodated in the shaft cylinder are ball pen refills, and a sliding end made of a resin molding or the like is formed at the rear end of each refill 1 (that is, the rear end opening 21 of the cylindrical accommodating portion 2). A moving body 9 is attached. Each sliding body 9 has a flange formed at the rear of the connecting portion (projecting refill holding portion 93) between the operation portion 91 projecting outside from the window hole 83 of the shaft tube 8 and the rear end of the cylindrical housing portion 2. 92, and the nib 3 of the refill 1 connected to the front of the sliding body protrudes by moving the operation unit 91 forward. Moreover, the said collar part 92 has latched the rear end of the elastic member 10 in the front surface, and at the time of pen nib immersion, the nib 3 will be in a stowed state because this collar part 92 is bulleted back. It is configured as follows.
The sliding body 9 is formed of an elastic resin, or a resilient member such as an elastomer or rubber is provided at a portion where the sliding body 9 comes into contact with the rear end of the shaft when returning, thereby making it possible to absorb return impact and refilling. The influence on the refill 1 during storage can be reduced.

Two of the three operation units 91 are colored in the hue matching the color of the ink 5 contained in the refill 1 to be connected and held, and have the same shape and different colors. The resin moldings of the same shape colored in red and blue are applied.
Further, a clip 94 is formed in one of the three operation portions 91 by extending a plate-like elastic portion forward from the operation portion 91. The clip 94 of the present embodiment is a resin molded body that is integrally formed with the flange portion 92 as the sliding body 9. However, the clip 94 may be composed of another material by two-color molding or insert molding, or separate parts such as metal. It can also be attached. In any case, it is preferable that the clip 94 has a shape in which the rear end (near the base) acts as the operation unit 91.

At the front end of each sliding body 9, a projecting refill holding portion 93 serving as a connection portion with the refill 1 is extended forward from the flange portion 92.
The protruding refill holding portion 93 is integrally formed with the sliding body 9 so that the front end direction is a large-diameter convex portion, and the writing tool 7 and the refill 1 are inserted into the rear end opening 21 of the refill 1. Connected.
More specifically, the front end of the projecting refill holding portion 93 is inserted into the opening 21 from the rear end side of the refill 1 and pressed so that the reduced diameter portion 23 gets over and fits the large diameter convex portion. In this state, since the refill 1 is connected and held to the protruding refill holding portion 93, the refill 1 is not easily removed when the writing instrument is accommodated, and can be attached and detached with a light force when replacing the refill.

  In the multi-core writing instrument 7, a desired writing instrument refill 1 (pen nib 3) can be selectively projected by sliding the operating section 91 of each sliding body 9 forward, and after the writing, the other operating section 91 is operated. By sliding lightly forward, the nib 3 of the selected refill 1 can be stored.

FIG. 5 shows an enlarged cross-sectional view of the refill connection portion of the writing instrument 7 of the second embodiment.
The writing instrument 7 of the present embodiment is a multi-core writing instrument 7 provided with a general-purpose rotation payout mechanism (rear shaft rotation type), unlike the first embodiment described above, in which the pendant 3 appears and disappears (see cited document 2).
Except for the in / out mechanism and the sliding body (refill connection part) attached thereto, it has the same configuration as that of the first embodiment described above, and each of the three writing instrument refills 1 of the above-described form each containing ink 5 having a different hue. It is a multi-core writing instrument that is housed and selectively revolves each refill by rotating the rear shaft.

  In the present embodiment, a writing refill 1 is connected and held by inserting the writing tool refill 1 from behind in a cylindrical refill holding portion 95 provided in front of the sliding body. FIG. The figure is shown. In addition, the refill 1 part (cylindrical accommodating part 2) in FIG. 5 is BB sectional drawing of FIG.2 (b) (the inner surface of the recessed part 22 is not shown in figure).

  The sliding body 9 is a resin member that can be moved in the front-rear direction by rotating the rear shaft. A metal pipe (specifically, a stainless steel pipe) is fitted in front of the sliding body 9 so that the pipe-shaped refill holding portion 95 is fitted. Is configured. In addition, in the pipe-shaped refill holding part 95 of the general-purpose structure used conventionally, the engaging part which latches the refill 1 is formed by processing a metal pipe at the time of manufacture (cited document 2). In this embodiment, since it is not necessary to perform the processing, the writing instrument manufacturing process is simplified.

The pipe-shaped refill holding portion 95 has a straight inner surface, and has an inner diameter that can be inserted without contacting the cylindrical housing portion 2 (the non-deformed portion having the outer diameter D1) of the writing instrument refill 1. . On the other hand, 24 bulging portions (deformed portions having an outer diameter D2) formed on the outer surface of the cylindrical housing portion 2 are plastically deformed so that they can be inserted into the inner surface.
Therefore, the bulging portion 24 is inserted into the pipe-shaped refill holding portion 95 by inserting the rear end of the writing instrument refill 1 in front of the pipe-shaped refill holding portion 95 and pressing it backward. In this state, since the refill 1 is connected and held to the pipe-shaped refill holding portion 95, the refill 1 does not easily come off when the writing instrument is accommodated, and can be attached and detached with a light force when replacing the refill.
Specifically, the virtual circular cross-section outer diameter D2 of the bulging portion 24 is adjusted so as to be larger in the range of 0 to 2% than the inner diameter of the pipe-shaped refill holding portion 95, and the connection state described above It will not come out, and you will not feel bad insertion or difficulty in removing the refill.

  In the writing instrument of the above-described embodiment, the slide lever type and rotary feeding type multi-core type writing instruments that accommodate a plurality of writing instrument refills have been described. However, it is also possible to apply a writing instrument that accommodates one writing instrument refill. At that time, any of a general-purpose rear end knock type, a side knock type and the like, and a cap type form provided with a cap covering the pen tip may be used. Moreover, it is also possible to apply to a double-headed form as another multi-core type writing instrument.

DESCRIPTION OF SYMBOLS 1 Writing instrument refill 2 Cylindrical accommodating part 21 Opening part 22 Recessed part 23 Reducing diameter part 24 Swelling part 3 Pen tip 4 Holder 5 Ink 6 Ink follower 7 Writing instrument 8 Shaft cylinder 81 Front shaft 82 Rear shaft 83 Window hole 84 Tip opening part 85 Locking step portion 9 Sliding body 91 Operation portion 92 Hook portion 93 Projection-shaped refill holding portion 94 Clip 95 Pipe-shaped refill holding portion 10 Elastic member (coil spring)
D1 Virtual line representing outer surface of cylindrical metal pipe before plastic deformation and its outer diameter D2 Virtual circle having outer diameter part as bulged part after plastic deformation and its outer diameter

Claims (5)

According to the number of refill holding parts of the writing instrument, one or two or more are accommodated in the shaft cylinder, and the writing tool refill that is detachably held behind the refill holding part,
The writing instrument refill is composed of a metal cylindrical housing portion containing a pencil lead or ink and a pen tip, the cylindrical housing portion having a pen tip at the front end and an opening portion at the rear end, and the opening portion. The outer surface in the vicinity is plastically deformed into a concave shape to form a reduced diameter portion with a narrow inner diameter of the cylindrical housing portion on the inner surface, and a bulging portion is formed on the outer surface in the vicinity of the recess. Writing instrument refill.   The writing instrument refill according to claim 1, wherein the recess is a plurality of depressions formed at equal intervals in the circumferential direction or an annular depression continuous in the circumferential direction.   The writing instrument refill according to claim 1, wherein the cylindrical housing portion is a stainless steel pipe.   A writing instrument for holding and storing the writing instrument refill according to any one of claims 1 to 3 by a refill holding unit.   The writing instrument according to claim 4, wherein the refill holding portion is a protrusion that can be inserted into the opening of the cylindrical housing portion or a cylindrical body into which the cylindrical housing portion can be inserted.

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