JPH0776196A - Writing instrument - Google Patents

Abstract

(57) [Summary] [Purpose] As a product group, it contributes to cost reduction and good quality. [Structure] In forming a double-headed writing instrument in which a pen tip 6 and a pen tip 7 are attached to both sides of a shaft composed of a main shaft 2 and an auxiliary shaft 3, a pen tip insertion hole of the main shaft 2 is inserted into a pen tip insertion hole of the auxiliary shaft 3. In addition to making it larger than the attachment hole, both the pen tip 6 and the pen tip 7 directly fix the intermediate size one, and if the more strange one is provided with a small diameter portion, insert it. If the size is smaller than that, the pen tip holder 10 is interposed to be inserted. In addition, if the handwriting width is narrow overall, ink with a low pigment concentration is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument such as a so-called double-headed writing instrument having pen tips on both sides of a shaft, which is suitable for forming a group as a product.

[0002]

2. Description of the Related Art Writing instruments designed to form a group of products include, for example, a plurality of types of writing instruments having different ink colors. Parts such as a shaft and a pen tip in each writing tool are of the same kind, that is, common parts. In addition, there are some types of writing instruments having different handwriting widths. A typical example is a small tube type writing instrument. The ink is common for each handwriting width.

Here, the common use of various parts for different ink colors not only achieves aesthetic unification but also contributes to cost reduction in forming a group of products. . The same applies to the common parts of the shafts and the common inks of different stroke widths. However, in the case where the pen tip is made of a plurality of types such as those having different handwriting widths, at least the pen tip cannot be a common part, and the different pen tip is attached to the shaft as a common part. Additional structure is required.

An example of this additional structure is a pen tip holder used as an intervening member between the shaft and the pen tip. That is, the portions of the pen tip holder with respect to the shaft are made equal, the portions with respect to the pen tip are made different according to the respective pen tips, and the whole of the pen tip attached to the pen tip holder is attached to the shaft. I am trying. However, since the use of the pen tip holder increases the number of parts, it hinders the bending angle from contributing to cost reduction.

In the case of a group of objects having different handwriting widths, if there is not much difference between the thickest and the thinnest handwriting widths, it is sufficient to make a difference in the diameter and tip shape of the pen tip itself. it can. For example, in many cases of so-called resin nibs, which are made of small-tube writing instruments and synthetic resin extruded products, the handwriting width differs depending on the difference in diameter of the small tubes or extruded products used for the pen tip. . However, for example, when forming a product group with a pen nib made of urethane foam or the like and the above-mentioned resin nib having different nib materials themselves, or
More generally, when different types of nibs are used to have a large difference in handwriting width, in such a case, it may be preferable that the thin handwriting has rather low density. On the contrary, if the ink is used in common in consideration of cost reduction, the quality of the entire product group may be deteriorated, and this tendency is particularly strong in the case of pigment ink.

Further, since the double-headed writing instrument having two nibs per axis can reduce the number of the whole as a whole, it can be preferably combined in forming a group as a product as described above. Therefore, it is necessary to pay more attention to cost reduction and overall quality.

[0007]

SUMMARY OF THE INVENTION The present invention is a writing instrument in which a plurality of types of pen nibs are inserted into a shaft as a common part to form a group as a product, and the pen nib of the shaft is provided. The diameter of the insertion hole is such that the largest diameter part of the multiple types of nibs to be attached to this shaft is the size that directly fixes the middle nib. As a result, a small diameter portion to be inserted into the pen nib insertion hole of the shaft is provided on the rear side of the maximum diameter portion of this large nib to fix it, and for smaller nibs, A writing instrument which is indirectly fixed by interposing a nib holder between the small nib and the shaft. "Also," a writing instrument having different types of nibs on each side of the shaft. , The shaft is composed of a main shaft and an auxiliary shaft that are fitted to each other. Was inserted into each of the auxiliary shaft, also, as a common part of these main shaft and auxiliary shaft, a plurality of kinds may nib nib that inserted into the main shaft is inserted into a plurality of types, the auxiliary shaft,
As a product group, the diameter of the pen nib insertion hole of the main shaft directly fixes the pen nib with the largest diameter part of the plural kinds of nibs to be inserted. For a pen tip larger than this pen tip, a small diameter part to be inserted into the pen tip insertion hole of the main shaft is provided and fixed on the rear side of the maximum diameter part of this large pen tip. For smaller pen nibs, a pen nib holder is interposed between the small nib and the main shaft to indirectly fix the nib. The diameter of the tip insertion hole is such that the maximum diameter portion of the plurality of types of nibs to be inserted is the size that directly fixes the middle nib, and for nibs larger than this nib, , A small diameter part to be inserted into the pen nib insertion hole of the spindle is provided on the rear side of the maximum diameter part of this large pen tip Has become Stationary, also, for the smaller nib, nib holder between the small nib and the main shaft - the by interposing writing instrument which is intended to indirectly fixed. Or "a writing instrument having different types of nibs on the respective shafts and containing pigment ink in the shafts so as to form a group as a product. Writing instruments that contain ink with a lower pigment concentration than those with a relatively large handwriting width for narrow ones. "Also," pen tips of different types are provided on each side of the shaft. Is a writing instrument containing an ink occlusion body made of a fiber bundle for supplying ink to these nibs, the shaft of which consists of a main shaft and an auxiliary shaft that are fitted to each other. It is inserted into each of the main shaft and the auxiliary shaft, and with these main shaft and auxiliary shaft as a common part, there are multiple types of pen tips that are inserted into the main shaft and multiple types of pen tips that are inserted into the auxiliary shaft. To form a group, in which the nib insertion hole of the main shaft There writing instrument is larger than the diameter of the nib insertion hole of the auxiliary shaft. "
Is the gist.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The attached FIGS. 1 to 6 are drawn in consideration of the case where all the products shown in these drawings form a group as one product. Both the main shaft 2 and the auxiliary shaft 3 forming the shaft 1 are common parts. Of course, it does not matter if there is a difference due to printing or the like. Further, the main shaft 2 and the auxiliary shaft 3 may have a length relationship as appropriate. Although it may be inserted only in the main shaft 2, the ink occlusion body 4 illustrated as being inserted in both the main shaft 2 and the auxiliary shaft 3 is also a common component. Further, the cap 5 covering the main shaft 2 and the auxiliary shaft 3 is also a common component. Moreover, the cap 5 illustrated is of the same type as that of the main shaft 2 and the auxiliary shaft 3. That is, the illustrated main shaft 2 and auxiliary shaft 3 have outer shapes capable of being capped with the same type of cap.

Not the common parts are the nib 6 inserted into the main shaft 2 and the nib 7 inserted into the auxiliary shaft 3. Although they are different within one writing instrument, and exceptions are formed, they are different between each writing instrument. Figure 1
It will be explained in order from the one.

First, in FIG. 1, the pen tip 6 is
A polyamide fiber bundle is joined with urethane to make a long product, and the tip of the product has a brush-like shape. The maximum diameter part is in the part protruding from the main shaft 2 and the rear part is 2
It is a reduced diameter portion of the step, and the stepped portion of the reduced diameter portion of the first step and the reduced diameter portion of the second step is locked to the front end of the rib 8 provided in an appropriate number in the inner hole of the main shaft 2, The reduced diameter portion of the eye is press-fitted into the rib 8. A space remains between the ribs 8, and this space is connected to the first-stage reduced-diameter portion and the annular space of the inner wall of the main shaft 2 (clearance that cannot be discriminated in the figure). Since it is not in contact with the end of the air vent, it is open toward the outside, and the air hole is secured in this manner. On the other hand, the pen nib 7 is similar to the pen nib 6 in terms of material, but is made of an elongated material having a relatively small diameter, and has a stepped portion between the maximum diameter portion and the reduced diameter portion behind it. Are engaged with the front ends of ribs 9 provided in the inner hole of the auxiliary shaft 3 in an appropriate number. The pen point 6 is that the rib 9 part is a press-fitting part and the open state is slightly different, but the air hole is secured.
As in. Further, the diameter of the portion of the main shaft 2 into which the pen tip 6 is inserted is larger than the diameter of the portion of the auxiliary shaft 3 into which the pen tip 7 is inserted. Basically, this relationship may be appropriately satisfied because there is a pen tip insertion structure that does not lock, but in the illustrated case, the diameter of the portion into which the first-stage reduced diameter portion of the pen tip 6 is inserted is the pen tip 7 The diameter of the inscribed circle of the rib 8 is also larger than the diameter of the portion into which the maximum diameter portion of the rib 8 is inserted.

Next, referring to FIG. 2, the pen tip 6 and the pen tip 7 are made of polyethylene terephthalate fibers which are bundled with an appropriate adhesive to form a long product. It is shaped. In both cases, the reduced diameter portion behind the maximum diameter portion has only one step, and the air holes are secured in the same manner as in the pen tip 7 of FIG.

Next, referring to FIG. 3, the pen tip 6 is
Only the tip shape is different from the pen tip 6 in FIG.
Since the pen point 6 in FIG. 1 does not have elasticity, the change in handwriting width is small, but it is not suitable for surface painting like the nib 6 in FIG. 2, but is for a considerably thick handwriting. On the other hand, the pen tip 7 is made of the same material as the pen tip 6, but has a small diameter. However, it is still for thicker handwriting than the ones described below. Since the pen tip 7 has a reduced diameter portion following the maximum diameter portion in two stages due to the relative small size of the insertion hole of the auxiliary shaft 3, the nib 6 is different from the pen tip 6 in FIG. It is similar.

Next, referring to FIG. 4, the pen tip 6 is
The polyacrylonitrile fibers are appropriately bundled with an adhesive to form a long and thin product, which has a shape as shown in the drawing. It is for handwriting thinner than the pen tip 7 in FIG. 3, and a pen tip holder-10 is interposed. That is, the pen tip holder 10 and the pen tip 6 are integrated into a pen tip body, and the rib 8 is formed.
From the front to the air hole, the pen tip 6 in FIG.
It is similar to. On the other hand, the pen tip 7 is equal to the pen tip 7 of FIG. As described above, when different ones have the same pen tip on one side and a different pen tip on the other side, the pen tips 7 inserted into the auxiliary shafts 3 are equalized, and the main shaft 2 It is preferable that the pen nibs 6 to be attached to the above are different from each other.

Next, referring to FIG. 5, the pen tip 6 is
The material is similar to the pen tip 6 and the like in FIG. 2, but it is thinner and the tip shape is slightly different. The shape is such that the change in handwriting width is less likely to occur. However, in writing and writing that is not worn, the writing may be thicker than the pen tip 6 in FIG. It depends on the individual difference in writing pressure. Further, it is the same as the pen tip 7 in FIG. 4 in that the pen tip holder 10 is interposed although the shape is different. On the other hand, the pen nib 7 is a kind of so-called resin nib, which is manufactured from an extruded product of polyacetal. Again, it is via the pen tip holder-10.

Next, in FIG. 6, the pen tip 6 and the pen tip 7 are different in diameter from the pen tip in FIG. It is the same in the point that it is interposed. The thickness relationship of the handwriting becomes thinner in the order of the nib 6 of FIG. 5, the nib 6 of FIG. 6, the nib 7 of FIG. 5, and the nib 7 of FIG. For example, according to a general handwriting width display, 0.8 mm, 0.5 mm, 0.3 mm,
As I said it was 0.1 mm.

In addition to the above-mentioned non-commonality of nibs, the inks used are not strictly common. That is, in the case shown in FIGS. 1 and 2, the same kind of ink is contained and the inks shown in FIGS.
In the case of
Further, all of the inks shown in FIGS. 1 to 6 contain pigment ink (not shown), but the inks shown in FIGS. 1 and 2 are shown in FIGS. 3 to 6. The pigment concentration is lower than that of the ink contained in the product, for example, about half.

Here, those shown in FIGS. 1 to 6 are as follows.
Both are assembled as follows, for example. First, the pen tip 7 is attached to the auxiliary shaft 3, the ink occlusion body 4 is inserted from the rear part of the auxiliary shaft 3, and the ink occlusion body 4 part of this partially assembled product is inserted from the rear part of the main shaft 2, Accordingly, after the main shaft 2 and the auxiliary shaft 3 are completely fitted, the injection needle for ink filling is deeply inserted from the front side of the main shaft 2 (the pen tip 6 is not inserted), and a predetermined amount of ink is injected. , The needle is retracted and a predetermined amount is re-injected, thus forming an air pocket in the central portion of the ink occlusion body 4 and filling a predetermined amount of ink as a whole, then the needle is pulled out, and the pen tip 6 is placed in front of the spindle 2. Insert from the side. Of course, different assembly methods may be adopted, such as when the ink occlusion body 4 is composed of two parts, one for the nib 6 and one for the nib 7, but at least one ink occlusion body 4 can be used. The reduction in the number of parts contributes greatly to the cost reduction, and at least the above-described assembly can be performed. In particular, the relatively thick pen tip 6 is relatively thin 7 (there are some exceptions.
As a whole, it has such a tendency) that it can be inserted later, and that a relatively thick pen tip 6 can be inserted from the end side of the ink occlusion body 4 in which needle holes are likely to remain. It is convenient for improving the ink connection in both the pen tip 6 and the pen tip 7 while taking into consideration the variation in the length of the ink occlusion body 4. In addition, regarding the reference numerals not shown and explained, 11 and 12 are the ink occlusion bodies 4.
The locking wall for restricting the positional deviation in the front-rear direction and the locking wall 13 for restricting the lateral position deviation of the ink occlusion body 4 are shown.

Although an example has been described above, other various modifications can be made without departing from the scope of the present invention. For example, when forming a group of products, it is often sold as a set, and considering the storability in a container, the cap is also a common part, but it shows the type of pen tip in terms of shape. Different caps may be capped like the caps. Further, the types of pen nibs can be combined in various ways, and it is also possible to have an appropriate pen nib such as a ball pen nib not described above. Further, what has been described with reference to the drawings is related to all the gist of the present invention at the same time, for example, a so-called double-headed writing instrument having a raw ink type writing instrument structure is used as the connecting shaft. It is also possible to insert them on both sides of the exterior shaft to form one writing instrument, and to combine these, or to combine a double-headed writing instrument and a writing instrument that does not.

[0019]

According to the present invention, it is possible to reduce the use of the pen tip holder and to reduce the diameter of most of the pen tip.
It can be made into a common component sufficiently, and the contribution to cost reduction will be extremely large. In addition, the quality is excellent, but especially when pigment ink is used and the pigment concentration is relatively low in the case of relatively fine handwriting, the ink ejection performance as a whole is excellent. Becomes

[Brief description of drawings]

FIG. 1 is a partially cutaway vertical sectional view showing an example of an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a partially missing portion showing an example of an embodiment of the present invention.

FIG. 3 is a vertical cross-sectional view of a partially missing portion showing an example of an embodiment of the present invention.

FIG. 4 is a partially cutaway vertical sectional view showing an example in one embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view of a partly cutaway showing an example in one embodiment of the present invention.

FIG. 6 is a longitudinal cross-sectional view of a partly cutaway showing an example in one embodiment of the present invention.

[Explanation of symbols]

 1 axis 2 main axis 3 auxiliary axis 4 ink absorber 5 cap 6 pen tip 7 nib 8 rib 9 rib 10 pen tip holder-

Claims (4)

[Claims] 1. A writing instrument in which a plurality of types of pen tips are attached to a shaft as a common part to form a group as a product, and the diameter of a pen tip insertion hole of the shaft is the same. The maximum diameter part of the multiple types of nibs that can be inserted into is the size that directly fixes the middle nib. A small diameter part to be inserted into the pen nib insertion hole of the shaft is provided on the rear side of the diameter part to fix it.For smaller pen nibs, the space between this small nib and shaft is fixed. A writing instrument that is indirectly fixed by interposing a pen tip holder. 2. A writing instrument comprising different types of nibs on each side of a shaft, the shaft comprising a main shaft and an auxiliary shaft fitted together, and each of the nibs being connected to the main shaft. Inserted into each of the auxiliary shafts, and using these main shaft and auxiliary shaft as a common component, there are multiple types of pen nibs to be inserted into the main shaft, and multiple types of pen nibs to be inserted into the auxiliary shaft. Here, the diameter of the pen tip insertion hole of the main shaft is such that the maximum diameter portion of the plurality of types of pen tips to be inserted is the dimension to directly fix the middle pen tip. , For a pen tip that is larger than this pen tip, a small diameter portion that is inserted into the pen tip insertion hole of the main shaft is provided on the rear side of the maximum diameter portion of this large pen tip, For smaller pen nibs, attach a pen nib holder between the small nib and the spindle. Indirectly fixed by interposing it, similarly, the diameter of the pen tip insertion hole of the auxiliary shaft is also directly fixed to the pen tip with the maximum diameter part of the multiple types of pen tips to be inserted. For a pen tip larger than this pen tip, a small diameter portion to be inserted into the pen tip insertion hole of the main shaft is provided and fixed on the rear side of the maximum diameter portion of this large pen tip. A writing instrument that is indirectly fixed to a smaller nib by interposing a nib holder between the small nib and the main shaft. 3. A pen tip of different types is provided on each shaft,
In addition, a writing instrument that contains pigment ink in the shaft to form a group as a product, where the writing width is relatively thin, the pigment concentration is greater than that of the writing stroke that is relatively thick. Writing instrument containing low-ink ink. 4. A writing instrument comprising different types of pen nibs on each side of a shaft, and accommodating an ink occlusion body composed of a fiber bundle for supplying ink to the nibs in the shaft. The shaft comprises a main shaft and an auxiliary shaft that are fitted together,
Each of the nibs is inserted into each of the main shaft and the auxiliary shaft. Also, with the main shaft and the auxiliary shaft as a common part, there are a plurality of types of pen nibs to be inserted into the main shaft, and the nibs to be inserted into the auxiliary shaft are also included. A writing instrument configured to form a group as a product with a plurality of types, in which the diameter of the pen tip insertion hole of the main shaft is larger than the diameter of the pen tip insertion hole of the auxiliary shaft.