JPH0776197A - Eraser container of writing implement - Google Patents

Abstract

PURPOSE:To provide an eraser container of a writing implement in which stability and assembling properties of the container of an eraser during using are improved, convenient operability at the time of using the eraser is improved and an effective using amount of the eraser can be increased. CONSTITUTION:An eraser container 10 comprises a containing recess 12 formed on an end 6a' of a cap body 6a, and a fixed holder 14 for removably containing fixedly an eraser 8 in the recess 12, wherein the holder 14 is formed of a plurality of divided pieces 20, and a base having a cut cylindrical part 22 having a larger outer diameter than a bore of the recess 12 and a smaller inner diameter than the outer diameter of the eraser 8 before engaging with the recess 12, and an inlet integrally formed continuously to the part 22 to introduce the eraser 8 into the cylindrical part 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eraser storage portion for a writing instrument. More specifically, the present invention relates to an eraser storage portion for a writing tool provided at the end of the cap body or the end of the shaft body of the writing tool.

[0002]

2. Description of the Related Art FIGS. 7 and 8 show an example of an eraser storage portion of a conventional writing instrument (hereinafter referred to simply as "rubber storage portion" in this section). FIG. 7 shows a cylindrical eraser accommodating portion b provided at the rear part of the mechanical pencil a, in which a cylindrical eraser c is simply press-fitted and attached, and FIG. 8 shows a so-called fitting metal fitting d for removing the eraser c. Installed.

However, in the prior art shown in FIG. 7, if the error between the outer diameter of the eraser c and the inner diameter of the rubber accommodating portion b is too large or too small, the eraser c will be removed. Since it is easy to remove from b or it is hard to fit, the degree of freedom in design is narrow and the rubber storage part b
However, there is a problem that the eraser c has poor stability and assembling property. Further, if the stability is poor, there is a problem that the eraser c is not easy to use.

Further, in common with those shown in FIGS. 7 and 8, the eraser c must be sufficiently fitted and held in the rubber accommodating portion b in order to ensure the stability. For this reason, even if the amount of protrusion of the eraser c coming out of the rubber storage portion b becomes small while the eraser c is used, the eraser c cannot be taken out much from the rubber storage portion b to ensure the stability. Therefore, the effective amount of eraser c is
It is the amount obtained by subtracting the amount of the eraser c fitted in the rubber storage portion b from the total length of the eraser c. Therefore, if the eraser c is used more than necessary from the rubber storage part b in order to increase the effective use amount, the eraser c will be removed from the rubber storage part b this time, or the stability will deteriorate, or In this case, since there is a gap between the bottom of the eraser c and the bottom of the rubber accommodating portion b, the eraser c is pushed back into the rubber accommodating portion b during use, resulting in poor usability. . Further, even in the case shown in FIG. 8, since the eraser c is fitted and killed by the dressing metal fitting d, there is a problem that the appearance may be unfavorable due to the presence of the dressing metal fitting d which is a constituent member. It was

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and the problem to be solved is that stability and assembling property of an eraser in use with respect to a rubber storage portion. And the flexibility of design can be widened, and even if the effective amount of eraser is increased, the eraser will not be pushed back into the rubber storage part during use and the eraser will be easy to use. It is to provide a rubber storage portion of a writing instrument capable of performing.

[0006]

The rubber storage portion of the writing instrument according to the present invention solves the above problems and is as follows. According to the eraser storage portion of the writing instrument according to claim 1, the eraser storage portion has a storage recess formed in the shaft body end portion or the cap body end portion, and the eraser storage portion is fitted into the storage recess portion and is in the storage recess portion. The stick-shaped eraser is composed of a fixed holder for detachably storing and fixing the stick-shaped eraser. The fixed holder is composed of a plurality of divided pieces and has a larger outer diameter than the inner diameter of the storage recess before being fitted into the storage recess. And a base portion having an introduction port portion for introducing the rod-shaped eraser into the slit tubular portion, the slit tubular portion having an inner diameter smaller than the outer diameter, and being integrally formed with the slit tubular portion.

According to the eraser storage portion of the writing instrument of the second aspect, the storage recess is formed continuously with the large-diameter recess located on the opening side of the storage recess and on the opening side. And a small-diameter concave portion located on the opposite side to the large-diameter peripheral surface portion of each of the divided pieces of the fixed holder, which corresponds to the large-diameter concave portion of the storage concave portion when the fixed holder is fitted into the storage concave portion. And a small-diameter peripheral surface portion which is continuous with the large-diameter peripheral surface portion via a step and is located corresponding to the small-diameter concave portion of the storage concave portion, and the diameter of the large-diameter concave portion of the storage concave portion is larger than the outer diameter of the fixed holder. Is larger and smaller than the large-diameter peripheral surface portion, and the diameter of the small-diameter concave portion of the storage concave portion is smaller than the outer diameter of the small-diameter peripheral surface portion of the fixed holder.

According to the eraser storage portion of the writing instrument of the third aspect of the present invention, an engagement protrusion for engaging the rod-shaped eraser is formed on the inner surface of the slit slit cylinder portion.

According to a fourth aspect of the present invention, there is provided the eraser storage portion of the writing instrument, wherein the locking projections are formed on the inner surface of the slit cylinder portion so as to be circumferentially spaced from each other.

According to the eraser storage portion of the writing instrument of the fifth aspect, the locking projection is formed on the inner surface of the slit cylinder portion in a single or plural ridges continuous in the circumferential direction. To do.

According to the eraser storage portion of the writing instrument of the sixth aspect, the notch between the divided pieces of the slit cylinder portion in the fixed holder is stopped before the boundary portion between the slit cylinder portion and the base portion. It is characterized by being.

According to the eraser storage portion of the writing instrument of the present invention, in the portion of the base portion of the fixed holder along the storage direction of the short rod-shaped eraser and on the extension line of the notch. An air vent groove for venting the air in the storage recess when the short rod eraser is inserted into the fixed holder that has been fitted into the storage recess is formed.

[0013]

Therefore, according to the rubber storage portion of the writing instrument of the present invention as set forth in claim 1, when the fixed holder is fitted into the eraser storage portion, the slit cylinder portion of the fixed holder is larger in outer diameter than the storage recess inner diameter. Each divided piece receives an external force that causes them to approach each other from the eraser housing portion, so that each divided piece has an outward elastic force. When the rod-shaped eraser is inserted into the fixed holder, the inner diameter of the fixed holder is smaller than the outer diameter of the rod-shaped eraser.Therefore, in addition to the elasticity of the fixed holder itself, the force of the rod-shaped eraser pushing the fixed holder from the inside to the outside. As a result, the fixed holder is pushed into the eraser storage portion, and the fixed holder can be fixedly attached to the eraser storage portion at the shaft body end portion or the cap body end portion of the writing instrument.

According to the rubber accommodating portion of the writing instrument of the present invention as defined in claim 2, since the diameter of the large-diameter concave portion of the accommodating concave portion is larger than the outer diameter of the small-diameter peripheral surface portion of the split piece of the fixed holder, the concave concave portion for accommodating the fixed holder is formed. Easy to put in. Also, the diameter of the large-diameter recess of the storage recess is smaller than the outer diameter of the large-diameter peripheral surface of the split piece of the fixed holder, and the diameter of the small-diameter recess of the storage recess is smaller than the outer diameter of the small-diameter peripheral surface of the split piece of the fixed holder. Is also small,
When the fixed holder is put into the storage recess, the large-diameter peripheral surface of the split piece elastically contacts the large-diameter recess of the storage recess, and the small-diameter peripheral surface of the split piece of the fixed holder elastically faces the small-diameter recess of the storage recess. Get in touch.

According to the rubber storage portion of the writing instrument of the present invention as set forth in claims 3 to 5, since the locking projection for locking the rod-shaped eraser is formed on the inner surface of the slitting cylinder of the fixed holder. The locking protrusion strengthens the attachment of the rod-shaped eraser in the fixed holder.

According to the rubber storage portion of the writing instrument of the present invention as set forth in claim 6, the notch between the divided pieces of the slit cylinder portion of the fixed holder is located before the boundary portion between the slit cylinder portion and the base portion. Since it is stopped, the notch is not formed in the portion from the introduction port portion of the fixed holder to the portion in front of the boundary portion.

According to the eraser housing portion of the writing instrument of the seventh aspect, since the air vent groove is formed, when the eraser is put in the fixed holder, air comes out from the air vent groove. Therefore, the eraser can be inserted into the fixed holder with a small resistance.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rubber storage portion of a writing instrument of the present invention will be described in detail below with reference to the drawings with reference to the accompanying drawings. 1 is an overall perspective view of a writing instrument that employs a rubber storage portion of the writing instrument of the present invention, FIG. 2 is an exploded perspective view of an essential part of FIG. 1, FIG. 3 is a side sectional view of an essential part of FIG. 1, and FIG. 4 is an exploded view of FIG. FIG. 5 is a side sectional view, FIG. 5 is a side sectional view of a rubber storing portion of the writing instrument of the present invention, and FIG. 6 is a sectional view taken along line VI-VI in FIG.

The felt-tip pen 2 as a writing tool is a felt-tip pen that uses a special ink that can be erased with an ordinary eraser, and is the point at which the shaft body 4 and the ink (not shown) at the tip of the shaft body 4 It is composed of a cap 6 to be put on.

As shown in FIGS. 1 and 2, the cap 6 comprises a cap body 6a to which a short rod-shaped eraser 8 (hereinafter simply referred to as "eraser 8") is attached, and a pocket clip 6b. Cap body 6
A rod-shaped eraser accommodating portion 10 (hereinafter simply referred to as "accommodating portion 10") for attaching the eraser 8 is provided at the tip portion 6a 'of a.

As can be seen from FIG. 2, the storage portion 10 has a storage recess 12 formed in the tip portion 6a 'of the cap body 6a.
And a fixed holder 14 that is fitted into the storage recess 12 and that removably stores and fixes the eraser 8 in the storage recess 12.

The storage recess 12 is formed continuously with the cylindrical large-diameter recess 16 as a large-diameter recess located on the side of the opening 12a, and is located on the opposite side of the opening 12a. A tubular small-diameter recess 18 as a small-diameter recess is integrally formed. Then, the fixed holder 14 provided with the eraser 8 is fitted into the entire tubular large-diameter recess 16 and a part of the tubular small-diameter recess 18.

A large-diameter peripheral surface portion of the fixed holder 14 which will be described later is located in the cylindrical large-diameter concave portion 16, and the diameter 16D of the cylindrical large-diameter concave portion 16 is fitted into the fixed holder 14. In the front, it is made larger than the outer diameter of a small-diameter peripheral surface portion of the fixed holder 14 described later and smaller than the large-diameter peripheral surface portion. Further, the small diameter peripheral surface portion is located in the cylindrical small diameter concave portion 18, and the diameter 18D of the cylindrical small diameter concave portion 18 has an outer diameter in the small diameter peripheral surface portion before the fixing holder 14 is fitted therein. It is smaller than the diameter.

As shown in FIGS. 2 to 6, the fixed holder 14 has at least one or more notches 19, 19 ... (Extended in the axial direction) (two notches are shown in this embodiment). 2) a plurality of divided pieces 20.
.. (two divided pieces are shown in this embodiment), and before fitting into the storage recess 12, the outer diameter is larger than the diameter of the cylindrical large-diameter recess 16 which is the inner diameter of the storage recess 12. The slit cylinder portion 22 that is a large portion into which the eraser 8 is inserted and that has an inner diameter smaller than the outer diameter of the eraser 8
And a base portion 23 having a flange 23a that is integrally formed with the slit cylinder portion 22 and has an introduction port 22a that is a portion for introducing the eraser 8 into the slit cylinder portion 22. The flange 23a has a larger diameter than the outer diameter of the tip 6a 'of the cap body 6a, thereby preventing the fixed holder 14 from being buried in the cap body 6a.

The divided pieces 20, 20 have a large-diameter peripheral surface portion 24 located corresponding to the cylindrical large-diameter concave portion 16 of the storage concave portion 12 when the fixed holder 14 is fitted into the storage concave portion 12, and a large-diameter peripheral surface portion 24. And a small-diameter peripheral surface portion 28 which is continuous with the stepped portion 26 and is positioned corresponding to the cylindrical small-diameter concave portion 18 of the storage concave portion 12.

A plurality of locking projections 30 and 30 for locking the eraser 8 are provided on the inner surface 22b of the slit cylinder portion 22 on the side of the base portion 23.
..... (6 locking projections are shown in this embodiment) are formed so as to be separated from each other in the circumferential direction. In this embodiment, the locking projections 30, 30, 30 ... Are continuously provided on the inner surface 22b of the tubular portion 22 in the circumferential direction, but the invention is not limited to this, and a single or a plurality of ridges may be formed. , Or the locking protrusions 30, 30, 30 ... May be provided at random. The point is that anything can be used as long as it can lock the eraser 8. Further, the notches 19 and 19 between the respective divided pieces of the slit cylinder portion 22 are stopped before the boundary portion between the slit cylinder portion 22 and the base portion 23. Air vent groove 31
Is a portion of the base portion 23 of the fixed holder 14 along the storing direction of the short rod-shaped eraser 8, and is the cutout 1
In the portion on the extension line of 9, the short stick eraser 8
Is for removing the air in the storage recess 12 when it is inserted into the fixed holder 14 already fitted in the storage recess 12.

Thus, the storage unit 1 thus constructed.
According to No. 0, when the fixed holder 14 is fitted into the housing portion 10, the slitting cylindrical portion 22 of the fixed holder 14 has the slitting cylindrical portion 22 whose outer diameter is larger than the inner diameter of the housing recessed portion 12, so that the slitting is performed. Each of the divided pieces 20, 20, ...
Receives an external force from the accommodating portion 10 that brings them closer to the axial center side. Therefore, each divided piece 20
Since a stress is generated in .. and an elastic force is generated in the outward direction, the fixed holder 14 is firmly fixed to the slit cylinder portion 22. When the eraser 8 is inserted into the fixed holder 14, the inner diameter of the fixed holder 14 is smaller than the outer diameter of the eraser 8. Therefore, in addition to the resilience of the fixed holder 14, the eraser 8 causes the eraser 8 to move. Since the force to push 14 from the inside to the outside comes to be added,
The fixed holder 14 is pushed into the storage recess 12. Therefore, since the fixed holder 14 is fixedly attached to the storage portion 10 of the tip portion 6a ′ of the cap body 6a of the felt-tip pen 2, the fixed holder 14 provided with the eraser 8 is easy to assemble and has good stability. Can be attached to.

Further, since the diameter 16D of the cylindrical large-diameter concave portion 16 of the storage concave portion 12 is larger than the outer diameter 28D of the small-diameter peripheral surface portion 28 of the divided pieces 20, 20, ... Of the fixed holder 14, the fixed holder 14 is accommodated in the concave portion. Easy to put in 12. Further, the diameter 16D of the cylindrical large-diameter concave portion 16 of the storage concave portion 12 is equal to the fixed holder 14
The outer diameter 24D of the divided pieces 20, 20 ... Is smaller than the outer diameter 24D, and the small-diameter recess 18 of the storage recess 12 is formed.
18D is smaller than the outer diameter 28D of the small-diameter peripheral surface portion 28 of the divided pieces 20, 20, ... Of the fixed holder 14,
When the fixed holder 14 is put into the storage recess 12, the divided piece 2
The large-diameter peripheral surface portion 24 of 0, 20 ... Makes elastic face-to-face contact with the cylindrical large-diameter concave portion 16 of the storage concave portion 12, and the cylindrical small-diameter concave portion 18 of the storage concave portion 12 has a divided piece 20.
The small-diameter peripheral surface portion 28 of 0 ... Is brought into face-to-face contact with elasticity. Therefore, in addition to the excellent stability of the fixed holder 14, the assembling property can be improved.

Further, the slitting cylinder portion 22 of the fixed holder 14
On the inner surface 22a of the locking projection 30 for locking the eraser 8
·······························
.30, 30 ... by means of the eraser 8 fixed holder 1
The mounting in 4 becomes strong (see FIG. 6). Therefore, since the eraser 8 is firmly fixed by the locking projections 30, 30, 30, ..., The degree of freedom in designing the fit dimension between the eraser 8 and the slit tube portion 22 is increased, and the effective usage amount is increased. It is also possible to prevent the eraser 8 from being pushed back into the rubber storage portion 10 during use.

Then, the slitting cylinder portion 22 of the fixed holder 14
The cutouts 19 and 19 between the divided pieces 20, 20 ...
Since it is stopped before the boundary portion 25 between the slitting cylinder portion 22 and the base portion 23, the cutouts 19 and 19 are formed in the portion 25a from the introduction port portion 22a of the fixed holder 14 to the portion before the boundary portion 25. It will not be formed. For this reason, it is possible to avoid the unsightly appearance due to the notches 19.

Furthermore, the eraser 8 is attached to the fixed holder 14
Since the air escapes from the air bleeding groove 31 when it is inserted into the slot, the eraser 8 is inserted into the fixed holder 14 with a small resistance. Therefore, this also facilitates the assembly. In the present embodiment, the rubber accommodating portion 10 is provided at the cap body end 6a ', but the present invention is not limited to this, and the rubber accommodating portion 10 is provided at the end of the shaft body of a mechanical pencil, for example. It may be provided.

[0032]

According to the eraser storage portion of the writing instrument of the present invention as set forth in claim 1, the stability of the eraser in use with respect to the rubber storage portion can be improved. According to the eraser housing portion of the writing instrument of the present invention as defined in claim 2, the assemblability can be improved in addition to the good stability.
According to the eraser storage portion of the writing instrument of the present invention as set forth in claims 3 to 5, the degree of freedom in designing the fit dimension between the eraser and the slit tube portion into which the eraser is inserted is increased, and the effective amount of the eraser is increased. However, it can be prevented from being pushed back into the cap body or the like. According to the eraser storage portion of the writing instrument of the present invention as defined in claim 6, it is possible to prevent the constituent members from adversely affecting the appearance.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a writing instrument that employs a rubber storage portion of the writing instrument of the present invention.

FIG. 2 is an exploded perspective view of a main part of FIG.

FIG. 3 is a side sectional view of a main part of FIG.

FIG. 4 is an exploded side sectional view of FIG.

FIG. 5 is a side sectional view of a rubber storage portion of the writing instrument of the present invention.

6 is a VI-VI in a state in which an eraser is stored in FIG.
It is a line sectional view.

FIG. 7 is a diagram showing a conventional technique.

FIG. 8 is a diagram showing another conventional technique.

[Explanation of symbols]

2 Writing implement 6a Cap body 6a 'Cap body end 8 Short rod eraser 10 Erase storage of writing implement 12 Storage recess 12a Open side 14 Fixed holder 16 Large diameter recess 16D Large diameter recess diameter 18 Small diameter recess 18D Small diameter recess diameter 19 Notch 20 Divided piece 22 Split tube portion (larger portion of fixed holder 14 in outer diameter) 22a Inlet portion 22b Inner surface 23 Base portion 24 Large diameter peripheral surface portion 24D Large diameter peripheral surface portion 26 Step portion 28 Small diameter peripheral surface portion 28D Diameter of small diameter peripheral surface 30 Locking protrusion 31 Air vent groove

Claims (7)

[Claims] 1. An eraser storage portion of a writing instrument, wherein the eraser is stored at the end of a writing instrument to attach a short stick eraser to the end of the cap body or the end of the shaft body of the writing instrument. It comprises a storage recess formed at the end or the end of the shaft body, and a fixed holder that is fitted into the storage recess and removably stores and fixes the rod-shaped eraser in the storage recess. A slitting cylinder portion having a plurality of divided pieces and having a larger outer diameter than the inner diameter of the storage recess before fitting into the storage recess and having an inner diameter smaller than the outer diameter of the rod-shaped eraser, and the slitting portion. A writing part characterized by comprising a base part which is integrally formed continuously with the cylindrical part and which has an introduction port part for introducing the rod-shaped eraser into the slit cylindrical part. Eraser storage for toys. 2. The storage recess comprises a large-diameter recess located on the opening side of the storage recess and a small-diameter recess continuous with the large-diameter recess and located on the opposite side of the opening. Each of the divided pieces of the fixed holder has a large-diameter peripheral surface portion located corresponding to the large-diameter concave portion of the storage concave portion when the fixed holder is fitted in the storage concave portion, and a step portion on the large-diameter peripheral surface portion. And a small-diameter peripheral surface portion corresponding to the small-diameter concave portion of the storage concave portion, and the diameter of the large-diameter concave portion of the storage concave portion is larger than the outer diameter of the small-diameter peripheral surface portion of the fixed holder and the large-diameter peripheral surface portion. The eraser storage portion of the writing instrument according to claim 1, wherein the eraser storage portion of the writing instrument is smaller than the outer diameter of the storage recess, and the diameter of the small diameter recess of the storage recess is smaller than the outer diameter of the small diameter peripheral surface portion of the fixed holder. 3. The eraser storage portion of the writing instrument according to claim 1, wherein an engaging protrusion for engaging the rod-shaped eraser is formed on an inner surface of the slit cylinder portion. 4. The eraser storage portion of the writing instrument according to claim 1, wherein a plurality of the locking protrusions are formed on the inner surface of the slit cylinder portion on the base side so as to be circumferentially spaced from each other. 5. The eraser storage for a writing instrument according to claim 1, wherein the locking projection is formed on the inner surface of the slit cylinder portion in a single or a plurality of circumferentially continuous ridges. Department. 6. The cutout between the divided pieces of the slit cylinder portion in the fixed holder is stopped before the boundary portion between the slit cylinder portion and the base portion.
An eraser storage part for the writing instrument as described in 5 above. 7. The short stick eraser is already fitted into the storage recess in a portion of the base of the fixed holder along the storage direction of the short stick eraser, which is on the extension line of the cutout. 7. The eraser storage portion of the writing instrument according to claim 1, further comprising an air vent groove for venting air present in the storage recess when inserted into the fixed holder.