JP2019098750A - Retractable writing instrument - Google Patents

Abstract

To provide a retractable writing instrument that does not impair the appearance or change the structure of the barrel from the original retractable multicore writing instrument when trying to obtain a retractable writing instrument with a smaller number of writing cores than the number of original writing cores.SOLUTION: There is provided a retractable writing instrument in which a plurality of writing cores are stored inside a barrel 1, a slider 3b provided at the rear end of the writing core is exposed from a window hole 1c which penetrates from the inside of the barrel to the outside and extends in the longitudinal direction of the barrel, the pen tip provided at the tip of the writing core is made to appear and retract from the tip opening of the barrel by sliding the slider against the edge forming the window hole, and a mounting member attachable to a barrel instead of the writing core and capable of covering at least a part of the window hole is provided.SELECTED DRAWING: Figure 1

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a retractable writing instrument in which a writing core is housed inside a barrel.

Conventionally, there is a retractable writing instrument in which a writing core is accommodated inside the barrel and a pen tip provided at the tip of the writing core is retracted from the tip opening of the barrel. The insertion and retraction operation of the pen tip is performed by operating a slider provided at the rear end of the writing core. Specifically, the slider is exposed to the outside of the barrel through the window hole provided in the barrel, and the pen tip protrudes and retracts as it slides against the window hole extending in the longitudinal direction of the barrel. .
In such a sunken writing instrument, the number and type of writing cores stored in the inside of the barrel are considered.
For example, the invention of an appearance type multi-core writing instrument is disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2016-135606) in which three writing cores are housed inside a shaft cylinder.

JP, 2016-135606, A

  However, when trying to obtain an appearance-type writing instrument whose number of writing cores is smaller than that of the original appearance-type expression writing instrument in the conventional appearance-type writing instrument, it simply ceased to be used only by removing the writing core from the original appearance-type expression multicore writing instrument The window hole loses the appearance. Therefore, it is necessary to newly design a cylinder having a window hole corresponding to the number of writing cores, which requires a cost for production.

  An object of the present invention is to provide a retractable writing instrument in which the number of writing cores is reduced without impairing the appearance or changing the structure of the barrel from the original retractable multi-core writing instrument.

  According to the present invention, the writing core is housed inside the barrel, and the slider provided at the rear end of the writing core is exposed from the window hole which penetrates from the inside of the barrel to the outside and extends in the longitudinal direction of the barrel, In a retractable writing instrument in which a pen tip provided at a tip of a writing core is made to appear and retract from a tip opening of the barrel by sliding with respect to an edge to be formed, the pen can be attached to the barrel instead of the writing core and A first aspect of the present invention is a retractable writing instrument including an attachment member capable of closing at least a part of the window hole, and the second attachment member being incapable of sliding with respect to the edge. According to a third aspect of the present invention, the mounting member is provided with an outer wall forming portion which is flush with at least a part of the edge portion. Further, the mounting member protrudes from the outer surface of the barrel. And extends along the longitudinal direction of the barrel, and The fourth aspect of the present invention is to provide a writing tool clip having a sandwiching portion between the two, and a partition that divides the space inside the shaft cylinder back and forth is provided, and the space inside the shaft cylinder back and forth in the partition A guide hole through which the writing core is guided, and the mounting member includes a locking portion locked to a rear edge of the guide hole in the partition, and the guide in front of the locking portion A fifth aspect of the present invention is that a small diameter portion which can be inserted into the hole is provided, and the small diameter portion is reduced in diameter from the locking portion toward the tip of the small diameter portion.

In the first aspect of the present invention, since the retractable writing instrument is provided with a mounting member attachable to the barrel instead of the writing core and capable of closing at least a part of the window hole, the writing core When the reduction is reduced, the window hole which is no longer used for the sliding operation of the slider does not remain in the notch, and the appearance of the writing-in and drawing-out writing tool is not impaired. It is possible to provide a sunken writing instrument with a reduced number of writing cores without changing.
In the second aspect of the present invention, when the mounting member is not slidable with respect to the edge, the user who mistakenly tries to slide the mounting member as the slider misinterprets the operation target immediately. It is possible to notice what is being done and to provide a more preferable introductory writing instrument.
In the third aspect of the present invention, the outer wall forming portion is flush with at least a part of the edge, thereby making the boundary between the outer wall forming portion and the edge inconspicuous, so that the appearance is not further impaired, and Thus, decoration such as transfer printing on the outer wall of the barrel is easy to be applied, and it is possible to provide a retractable writing instrument having a more preferable appearance.
In the fourth aspect of the present invention, the barrel of the original retractable writing tool has a window formed at the position where the slider is exposed, and when the mounting member is attached, there is a writing tool clip instead of the slider. As a result, not only the function as a writing tool clip can be added to the retractable writing tool, but also the positional relationship with other sliders is preferable, so that it is possible to obtain the emerging retractable writing tool having an appearance that does not feel uncomfortable as a whole.
In the fifth aspect of the present invention, a partition is provided which divides the space inside the cylinder back and forth, and the partition is provided with a guide hole which penetrates the space inside the cylinder back and forth and the writing core is guided The mounting member is provided with a locking portion which locks to the rear edge of the guide hole in the partition, and a small diameter portion which can be inserted into the guide hole in front of the locking portion, the small diameter portion Since the diameter is reduced from the locking portion toward the front end of the small diameter portion, even when the small diameter portion contacts the rear edge of the guide hole when the mounting member is attached to the shaft cylinder, It is easy to be guided to the guide hole along the shape, and the locking portion is locked to the rear edge of the guide hole, so the user who is performing the mounting operation can easily recognize the insertion end position of the small diameter portion , Which makes it easy to mount the mounting member, which is preferable.

The external appearance perspective view of the appearance and appearance type writing instrument of this invention Longitudinal cross-sectional view of the emerging and recessed writing instrument of the present invention Enlarged view around the divider 1f External perspective view of the clip base 4 External perspective view of coil spring 5 and clip 6 Assembly drawing of clip 6 and crown 7

  In the retractable writing instrument of the present invention, the writing core is housed inside the barrel. In order to function as a writing instrument, the retractable writing instrument attached with the mounting member described later accommodates one or more writing cores inside the barrel. Therefore, the retractable writing instrument before attaching the mounting member is a retractable multicore writing instrument in which two or more writing cores are accommodated inside the barrel. In addition, the retractable writing instrument having the mounting member attached thereto may be a retractable multicore writing instrument in which two or more writing cores are accommodated inside the barrel, and the number of writing cores can be selected as needed.

The barrel has a tip opening where the pen tip of the tip of the writing core can be inserted and retracted. Further, when the writing core is housed inside the barrel, the slider provided at the rear end of the writing core is exposed from the window hole described later to the outside of the barrel.
The barrel can be formed of a known material, and for example, materials such as polycarbonate, acrylonitrile butadiene styrene, acrylonitrile styrene, polyoxymethylene, polystyrene, polypropylene, polyethylene, or polyethylene terephthalate can be appropriately selected. The barrel may be formed of one of these materials as a single member, or may be formed by combining a plurality of members such as a front shaft and a rear shaft.

  As the writing core, a pen tip at the front end and a slider at the rear end may be used, and, for example, a refill for a ballpoint pen or a unit for a mechanical pencil can be appropriately selected. When adopting a refill for a ballpoint pen, color display can be achieved by making the color of the slider the same as the color of the ink. In addition, when the barrel is transparent, the refill inside the barrel can be visually recognized from the outside, and at that time, the color can be displayed by making the color of the refill the same as the color of the ink.

The window hole is a notch which penetrates from the inside to the outside of the barrel and extends in the longitudinal direction of the barrel. By sliding the slider of the writing core with respect to the edge forming the window hole, the pen point of the writing core tip emerges from the tip opening of the barrel.
The number of window holes is the same as the number of writing cores stored in the inside of the shaft cylinder in the retractable writing instrument before the attachment member is attached.

The attachment member is a member that can be attached to the barrel instead of the writing core, and can cover at least a part of the window hole when attached to the barrel.
“Attachable to a shaft cylinder” refers to a shape and a structure capable of forming a state in which natural falling does not occur at least from the shaft cylinder in a state where the mounting member is mounted on the shaft cylinder.
To be able to cover at least a part of the window hole means that the inside of the barrel which is not intended to be viewed through the window hole as a notch is not visible through the entire window hole, It refers to the state in which the mounting member is visible.
By attaching such a mounting member to the shaft cylinder of the retractable writing tool instead of the writing core, when the writing core is reduced from the original retractable writing tool, the window hole not used for the sliding operation of the slider is cut out Since it does not remain as a notch and does not damage the appearance of the introductory writing instrument, it is possible to provide an invading writing instrument in which the number of writing cores is reduced without changing the structure of the barrel of the original introductory writing instrument. .
Therefore, the shape, the structure, the material, the mounting method to the shaft cylinder, and the like of the mounting member can be appropriately selected as long as the functions and effects thereof can be exhibited. For example, as a shape of the attachment member, a shape or a structure having another function such as a protrusion as a rolling stopper, an eraser, a strap holder or the like may be used. Moreover, as a material, it can shape | mold from a well-known material, for example, materials, such as a polycarbonate, an acrylonitrile butadiene styrene, an acrylonitrile styrene, polyoxymethylene, a polystyrene, a polypropylene, polyethylene, or a polyethylene terephthalate, can be selected suitably. As a mounting method, it can be mounted at a position where the writing core removed from the inside of the barrel is stored, or it can be mounted so as to cover the window hole where the slider is exposed from the outside of the barrel.

When attaching the mounting member to the shaft cylinder, if it is impossible to slide against the edge that forms the window hole, the user who attempted to slide the mounting member mistaken for the slider immediately becomes the operation target. It is possible to notice the misperception and is more preferable.
“Impossible to slide” means that when the user applies the same vector force to the mounting member as when sliding the slider, the mounting member moves from the position where it is attached to the barrel at all It refers to a state where it can move only a much shorter distance than necessary to cause the tip of the writing core tip to protrude from the barrel end opening even if it is not moved or moved.
Therefore, as a method of attaching the attachment member, for example, attachment with a so-called fitting structure in which the attachment member itself is fitted to the edge portion can be mentioned. In addition, the edge forming the window hole does not necessarily have to be in contact with the mounting member. For example, the mounting member is pinched from the front and back by other members at a position separated from the inner wall of the barrel inside the barrel. There is a means such as a drop. However, in view of the covering effect of the window hole by the mounting member described above, it is preferable to mount it at a position as close to the edge as possible, and it is more preferable to directly contact the edge.

If the mounting member is provided with an outer wall forming portion which is flush with at least a part of the edge forming the window hole, the boundary between the outer wall forming portion and the edge becomes inconspicuous when the mounting member is mounted on the shaft cylinder. Further, the appearance such as transfer printing on the outer wall of the shaft cylinder can be easily provided without damaging the appearance, and a writing tool with a more preferable appearance can be provided.
When at least a part of the edge and the surface are flush with each other, when the mounting member is attached to the barrel, the step between the outer wall forming portion and the barrel outer wall side of the rim is extremely small. It is easier to decorate the area that is flush with the edge, as the area is closer to the entire circumference. In particular, when the mounting member described above is adopted in combination with a configuration that makes it impossible to slide with respect to the edge, the outer wall forming portion also becomes non-slidable with respect to the edge, which further facilitates decoration such as transfer printing, It is more preferable.

A clip for a writing tool which protrudes from the outer surface of the barrel and extends along the longitudinal direction of the barrel in a state where the mounting member is mounted on the barrel in the mounting member, and which forms a holding portion between the barrel and the barrel. Is more preferable. More specifically, the barrel of the original retractable writing tool has a window hole at the position where the slider is exposed, and when the mounting member is attached, the retractable writing tool clip is present instead of the slider. In addition to the function as a clip for a writing tool, since the positional relationship with other sliders is preferable, it is possible to obtain an appearance-type writing tool having a preferable appearance without a sense of discomfort as a whole. In order that the positional relationship with other sliders is preferable, the window holes of the multi-core writing instrument of appearance and retraction type are generally formed at substantially equal intervals in the circumferential direction of the shaft cylinder according to the number of sliders. When the writing tool clip is disposed, the distance from the other sliders is substantially equal.
As a type of the clip for writing instrument, a resilient clip such as a coil spring is disposed between a fixing clip integrally formed with the mounting member, and the mounting member as the base and the clip for writing tool, The so-called binder clip, etc., in which the tip end side of the writing tool clip is biased in the direction approaching the barrel, can be selected as appropriate by the force always biasing the rear end side of the writing tool clip away from the barrel is there.

It is preferable to provide a partition which divides the space inside the shaft cylinder back and forth inside the shaft cylinder, and to provide a guide hole which penetrates in the front and back of the space inside the shaft cylinder. By the writing core being guided to the guide hole, the writing core is positioned in the barrel and the pen tip can be made to appear and retract more smoothly.
Then, the mounting member is provided with a locking portion which locks the rear edge of the guide hole in the partition, and a small diameter portion which can be inserted into the guide hole in front of the locking portion. Assuming that the diameter of the portion is reduced from the locking portion toward the tip of the small diameter portion, even when the small diameter portion is in contact with the rear edge portion of the guide hole when attaching the mounting member to the shaft cylinder, It is easy to be guided by the guide hole along the shape of the small diameter part, and the locking part is locked to the rear edge of the guide hole, so the user who is performing the mounting operation can easily insert the end position of the small diameter part It is easy to attach the mounting member, which is preferable.
In addition, when the locking portion and the small diameter portion are provided at the tip of the thin rod portion of the portion housed inside the shaft cylinder of the mounting member, when attaching the mounting member to the shaft cylinder, other writing cores etc. It is hard to contact with the member and is preferable.

The locking portion can be locked to the rear edge of the guide hole by having the diameter of the circumscribed circle in the radial direction larger than the inner diameter of the guide hole, and the entire locking portion The diameter of the circumscribed circle may be adjusted by means such as providing a projection as well as increasing the diameter of the circle.
The small diameter portion is reduced in diameter from the proximal end of the locking portion toward the tip of the mounting member. In particular, it is preferable that the shape of the tip end is a shell-like rounded shape, because it can be more easily inserted into the guide hole.

Hereinafter, examples of the present invention will be shown.
FIG. 1 is an external perspective view of the appearance and withdrawal type writing tool of the present invention, and FIG. 2 is a longitudinal sectional view of the appearance and withdrawal type writing instrument of the present invention.
The barrel 1 is composed of two members, a front shaft 1a and a rear shaft 1b. The front shaft 1a and the rear shaft 1b are connected by screwing. The front shaft 1a and the rear shaft 1b are respectively made of polycarbonate, and are excellent in impact resistance and moldability.
Further, the outer wall of the front shaft 1a is provided with a grip 2 which is a gripping member. The grip 2 is made of an elastic material such as rubber, elastomer, or a mixture thereof, and therefore, when gripped by the user, a soft touch is obtained and it is difficult to slip.

A refill 3 for a ballpoint pen is accommodated as a writing core in the inside of the barrel 1, and in the present embodiment, two refills 3 are accommodated (one is not shown in FIG. 2). A slider 3 b provided at the rear end of the refill 3 is exposed through a window hole 1 c provided in the barrel 1. By causing the slider 3 b to slide relative to the window hole 1 c extending in the longitudinal direction of the barrel 1, the refill 3 moves inside the barrel 1, and the pen point 3 a provided at the tip of the refill 3 is the barrel Evident from 1's tip opening 1d.
The internal space of the barrel 1 is divided back and forth by a partition 1f provided on the rear shaft 1b. A guide hole 1g to be described later is provided in the partition 1f, and the refill 3 is stored through the guide hole 1g.

  Instead of one refill 3, a clip base 4 as an attachment member is attached to the inside of the barrel 1. The clip mounting portion 4c of the clip base 4 is shaped so as to protrude radially outward from the axial center of the barrel 1, and when the clip base 4 is mounted, the clip is mounted via the window hole 1c. The mounting portion 4c is exposed and covers the window hole 1c.

  A crown 7 is attached to the rear end opening 1 e of the barrel 1. When there is no clip base 4, the crown 7 is attached to the rear end opening 1 e such that it can move back and forth slightly by so-called over fit, but does not drop naturally. The crown 7 regulates the movement of the slider 3 b of the refill 3 and the clip base 4 in the circumferential direction and the radial direction inside the barrel. Further, by sandwiching the clip base 4 with a partition 1 f to be described later, the clip base 4 is attached so as not to move back and forth, that is, so as not to slide with respect to the edge of the window hole 1 c. In other words, the crown 7 is attached to itself so as not to be able to move back and forth by abutting against the clip base 4 which can not be advanced. At the rear end of the crown 7 is formed a recess for attaching a decorative item such as an earphone jack accessory, and as described above, the crown 7 can not move back and forth, so a decorative item such as an earphone jack accessory is attached It is easier. The crown 7 is made of polycarbonate and is excellent in impact resistance and moldability.

A clip attachment portion 4c described later is exposed from one of the window holes 1c, protrudes from the outer surface of the barrel 1, extends along the longitudinal direction of the barrel 1, and is between the barrel 1 The clip 6 forming the clamping part is attached together with the coil spring 5. In the present embodiment, the window holes 1c are equally provided in the circumferential direction of the barrel 1, so that the clip 6 is attached to the clip attachment portion 4c exposed from the window holes 1c, whereby the position with the other refill 3 is obtained. It was possible to obtain an appearance-type writing instrument having a preferable relationship and having no discomfort as the whole writing instrument.
In the clip 6 in the present embodiment, the rear end side of the clip 6 is always urged in a direction away from the barrel 1 by the repulsive force of the coil spring 5 so that the tip side of the clip 6 approaches the barrel 1 A so-called binder clip is adopted which can be biased and can hold an object between the clip 6 and the barrel 1. When the binder clip is used, the front end side is opened by pushing the rear end side in a direction approaching the barrel 1, but generally, a force acting in a forward direction with respect to the clip 6 is exerted. It is. Then, since the clip base 4 can not move forward and backward, the clip 6 does not move with respect to the force, so the tip side can be more easily opened.

FIG. 3 is an enlarged view of the vicinity of the partition 1 f. In addition, it is set as the figure which longitudinally divided only the outer wall of the rear axle 1b for convenience of explanation.
Guide holes 1g are provided at three locations in the partition 1f. Two of them penetrate the refill 3 and the refill 3 is positioned in the barrel 1 so that the pen tip 3 a can be more smoothly ejected from the tip opening 1 d of the barrel 1.
The small diameter portion 4a provided at the tip of the clip base 4 is inserted into one of the three guide holes 1g, and the locking projection 4b, which is a locking portion, is locked to the rear edge of the guide hole 1g. doing. By means of these constructions and the previously mentioned crown 7 the clip base 4 is mounted non-slidably against the edge forming the window 1c.

FIG. 4 is an external perspective view of the clip base 4.
The clip base 4 is provided with a locking projection 4b as a locking portion at the tip of a small diameter rod portion and a small diameter portion 4a at the tip side.
Since the diameter of the circumscribed circle in the radial direction of the locking projection 4b is larger than the inner diameter of the guide hole 1g, when the small diameter portion 4a is inserted into the guide hole 1g, the diameter of the locking projection 4b and the guide hole 1g The rear edge can be locked and the end of insertion can be recognized.
Further, since the small diameter portion 4a is reduced in diameter from the base end portion of the locking projection 4b toward the tip end of the clip base 4, when the insertion portion 4a is inserted into the guide hole 1g, the insertion portion 4a is a guide hole Even if it comes in contact with the rear edge of 1g, it is guided along the shape of the insertion portion 4a, which makes the clip base 4 easier to attach. The insertion portion 4a in the present embodiment is shaped like a shell having a curved end at the tip, so that it is particularly easy to insert into the guide hole 1g.
Here, the clip base 4 will be described in detail with reference to FIGS. 2 to 4. The clip base 4 can be attached to the inside from the rear end opening 1 e of the barrel 1 by the presence of the rod-like portion housed inside the barrel 1 in the clip base 4 and the locking projection 4 b and the small diameter portion 4 a at its tip. it can. Assuming that the clip base 4 is attached from the outside of the window hole 1c of the barrel 1, select a substantially plate-like shape according to the shape of the window hole 1c so as not to enter the barrel 1 inside from the window hole 1c. If the clip 6 is not attached to the clip attaching portion 4c first, it is difficult to hold the whole as it is difficult to position. However, as in the present embodiment, the entire clip base 4 is the longitudinal length of the barrel 1 The rod-like shape along the direction and being attachable to the inside from the rear end opening 1 e of the barrel 1 makes it easy to determine the mounting position of the clip base 4 without attaching the clip 6. Furthermore, since the clip mounting portion 4c is formed in the clip base 4, the clip mounting portion 4c preferentially exposed from the window hole 1c can be gripped and pulled after the clip base 4 is inserted into the barrel 1 Because it can, it is easier to assemble.
Furthermore, when the clip base 4 is attached from the outside of the window hole 1c of the barrel 1, the barrel 1 from the edge of the window hole 1c so that the clip base 4 does not enter the interior of the barrel 1 through the window hole 1c. It is necessary to provide a projecting portion on the outer wall side of the frame, and the range which can be made flush with the outer wall forming portion 4f becomes small. However, as in the present embodiment, the clip base 4 If it is the structure which can be attached by stop | fastening, the clip base 4 will not remove | deviate from the window hole 1c, and the outer wall formation part 4f can be designed by the part flush with the window hole 1c.
Although the clip 6 which is a binder clip is attached to the clip attaching part 4c, if it is a case where the clip base 4 is attached from the outside of the barrel 1, the tip end side of the clip base 4 itself In the worst case, there is a risk that the clip base 4 may be lifted, but as in the present embodiment, the clip base 4 can be attached by locking inside the barrel 1 so that the clip 6 can be opened and closed. Since the clip base 4 does not move from the mounting position or come out of the barrel 1 along with the operation, the non-sliding against the edge of the window hole 1c of the clip base 4 and the edge of the window 1c by the outer wall forming portion 4f It can be made sure that it is in line with

  On the side surface of the clip base 4, a lightening portion 4e is provided. The clip base 4 is a member made of polycarbonate, but in general, the resin molded product may shrink as it cools in the molding process, and so-called sink marks may occur. When the sink occurs, the entire resin product may be curved, unnecessary unevenness may be generated on the surface, or the appearance may be impaired. In order to prevent this sinking, a lightening portion 4e is provided in advance, and in this embodiment, it is provided in two places on one side. It is because there is a possibility that the strength of the clip base 4 itself may be reduced if it is lightened at one place over the entire side surface of the clip base 4. In particular, in the present embodiment, since the binder clip is adopted, the tip end side of the clip 6 is always in contact with the clip base 4 and biased. Furthermore, with the opening and closing of the clip 6, there is a possibility that an impact is applied to the clip base 4 at the tip end side of the clip 6. Besides these, for example, when attaching the clip 6 described later, there is a possibility that a load may be applied also in the direction orthogonal to the longitudinal direction of the barrel 1. On the other hand, the strength of the clip base 4 is maintained by dividing the lightening portion 4b into two parts at a boundary near the position where the tip end side of the clip 6 contacts the clip base 4.

  An outer wall forming portion 4f which is flush with the edge of the window hole 1c is provided in a part of the portion of the clip base 4 exposed to the outside of the barrel 1 through the window hole 1c. As a result, the boundary between the window hole 1c and the clip base 4 becomes inconspicuous and does not deteriorate the appearance, and it becomes easy to apply decoration such as transfer printing to the outer wall of the barrel 1.

FIG. 5 is an external perspective view of the coil spring 5 and the clip 6.
On the axial cylinder side of the clip 6, a through hole 6a into which a fitting projection 4d which is a rotation shaft of the clip 6 is fitted, and a spring fixing projection 6b are provided.
The fitting projection 4d protrudes in the direction orthogonal to each of the axial cylinder longitudinal direction and the direction in which the clip mounting portion 4c protrudes, so the through hole 6a is also provided at a position matching this. A part of the fitting protrusion 4d on the clip side is chamfered to facilitate fitting with the through hole 6a.
The spring fixing protrusion 6 b is a protrusion that protrudes from the clip 6 side toward the barrel 1 and is a protrusion to which the coil spring 5 is fixed. The other end of the coil spring 5 contacts a flat surface of the clip base 4 provided on the rear end side of the clip attaching portion 4 c.

FIG. 6 is an assembly view of the clip 6 and the crown 7.
In the present embodiment, when the clip base 4 is attached to the barrel 1 instead of the refill 3, the clip attaching portion 4 c is exposed from the window hole 1 c, so the spring 5 and the clip 6 can be attached thereto. Thereafter, the refill 3 is inserted from the front end side of the rear shaft 1b, and finally the crown 7 is attached from the rear end opening 1e. As a result, it is possible to obtain an emergent-type writing instrument in which one refill 3 as a writing core is reduced without designing a new barrel 1 in which the number and position of the window holes 1c are changed.
In addition, since one of the guide holes 1g in the shaft cylinder 1 is closed earlier by the small diameter portion 4a of the clip base 4 at the time of assembly, erroneous insertion when inserting the refill 3 into the remaining guide holes 1g is prevented. be able to. Moreover, since the maximum outside diameter of the small diameter portion 4a is larger than the inner diameter of the refill 3, even if it is brought into contact with the small diameter portion 4a temporarily when the refill 3 is inserted, the small diameter portion 4a can enter into the refill 3 Because there is not, it is possible to prevent an erroneous insertion and it is easier to assemble.

Reference Signs List 1 shaft cylinder 1a front shaft 1b back shaft 1c window hole 1d front end opening 1e rear end opening 1f partition 1g guide hole 2 grip 3 refill 3a pen tip 3b slider 4 clip base 4a small diameter portion 4b locking projection 4c clip mounting portion 4d Mating projection 4e Lightening part 4f Outer wall formation part 5 Coil spring 6 Clip 6a Through hole 6b Spring fixing projection 7 crown

Claims (5)

  A writing core is accommodated in the inside of the barrel, and a slider provided at the rear end of the writing core is exposed from a window hole which penetrates from the inside of the barrel to the outside and extends in the longitudinal direction of the barrel, an edge forming the window A retractable writing tool for causing a pen tip provided at the tip of the writing core to be retracted from the tip opening of the barrel by sliding relative to the shaft cylinder, wherein the window core can be attached to the shaft instead of the writing core; An emerging and retractable writing instrument provided with a mounting member capable of covering at least a part of   The emerging and retractable writing instrument according to claim 1, wherein the attachment member is made non-slidable with respect to the edge.   The appearance / introduction writing instrument according to claim 1 or 2, wherein the mounting member is provided with an outer wall forming portion which is flush with at least a part of the edge portion.   The mounting member is provided with a writing tool clip which protrudes from the outer surface of the barrel and extends along the longitudinal direction of the barrel and forms a holding portion between the barrel and the barrel. The emerging and retractable writing instrument according to any one of claims 3.   A partition is provided to divide the space inside the barrel back and forth, a guide hole is provided in the partition to penetrate the space inside the barrel back and forth and the writing core is guided, and the mounting member Among them, a locking portion locked to the rear edge of the guide hole and a small diameter portion insertable into the guide hole forward of the locking portion are provided, and the small diameter portion is a portion from the locking portion to the small diameter portion The emerging and retractable writing instrument according to any one of claims 1 to 4, wherein the diameter is reduced toward the tip of the head.

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