JPH096515A - Input pen for terminal equipment - Google Patents

Abstract

PURPOSE: To improve a writing feeling by inserting and fixing a taper, columnar and plastic-made pen tip part forming a pen tip on its top into the center hole of a pen body part. CONSTITUTION: A pen body part 2 is made from wood and a hole 4 is formed on the center of the body part 2. A taper and columnar pen tip part 3 consisting of hard plastic such as polyacetal is formed and a round pen tip 3a is formed on one end side of the pen tip part 3. While projecting the pen tip 3a from the one end side, then pen tip part 3 is inserted into the hole 4 of the pen body part 2 and fixed by adhesives. Since the input pen 1 can be used again by sharpening the pen body part 2 and the pen tip part 3 when the pen 1 can not be used because of the consumption of the pen tip 3a, the writing feeling of the pen 1 can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of an input pen in a pen input terminal device.

[0002]

2. Description of the Related Art Among input devices, there is a pen input type device in which an input pen is used for handwriting input to a tablet or the like without using a keyboard. FIG. 26 is a side view showing an example of an input pen used in such a conventional pen input type terminal device. In FIG. 26, the input pen 101 is integrally formed in a pencil shape by providing a pen body 102 having a round and elongated rod shape with a pen tip 103 having a slender tip at one end. As the material, a hard plastic such as polyacetal (Duracon) or the like is used with emphasis on durability and productivity. Then, with this input pen 101, the pen tip 103 may be scraped and reduced by use, but if it is used as it is, it may scratch the input surface of the tablet, so it seems that it has been scraped and worn. In this case, each input pen 101,
Everything was discarded.

FIG. 27 is a side view showing another example of a conventional input pen. In FIG. 27, this input pen 1
Reference numeral 11 denotes a tip 113 formed separately from the pen body 112 at one end of a pen body 112 having a round and long rod shape.
The pen tip 113 having a long and sharp a is fixed and attached with an adhesive or the like, and the pen body 112 and the pen tip 113 are integrated. In this case, the pen body 112
The pen nib 113 and the pen nib 113 can be formed by different members, and only the pen nib 113 can be made of, for example, polyacetal (Duracon).
It is also possible to form the other pen body 112 with a softer plastic or the like. Further, even with this input pen 111, when the pen tip 113 is scraped down due to use, all of the input pen 111 are discarded.

[0004]

As described above, as shown in FIG.
6 and the input pens 101, 11 of the conventional structure shown in FIG.
In No. 1, when the pen tips 103 and 113 are scraped due to use and further use becomes impossible, the pen body 10
It was necessary to discard and replace the entire input pens 101, 111, including 2, 112. This was uneconomical and costly. Further, since the lengths of the nibs 103 and 113 cannot be adjusted, it is difficult to obtain an input pen having the nibs 103 and 113 that suits the operator's preference, and there is a problem that the writing comfort is poor.

The present invention has been made in view of the above problems, and an object thereof is to provide an input pen for a terminal device capable of improving writing comfort.

[0006]

According to the present invention, there is provided an input pen for a terminal device having a pen tip protruding from one end side of a pen body. A slender cylindrical plastic nib portion having a hole and having the nib formed at the tip is positioned and arranged in the hole, and the pen nib provides a writing comfort to suit one's taste. Thus, the length and shape can be adjusted by scraping, or they can be easily replaced.

[0007]

According to this structure, it is possible to easily realize an input pen having a pen tip that provides a writing feeling that suits one's taste.

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 to 4 show a first embodiment of an input pen for a terminal device according to the present invention. FIG. 1 is a sectional view taken along the line AA of FIG. 3, FIG. 2 is an exploded sectional view thereof, and FIG. 3 is an external side view, and FIG. 4 is an end view. 1 to 4, the input pen 1 includes a pen body 2 made of wood and a pen tip 3 made of plastic.

More specifically, the pen tip portion 3 is made of a hard plastic such as polyacetal (Duracon), and is formed in an elongated cylindrical shape having a radius of 1 to 1.5 mm and a length of 100 to 150 mm. Further, a pen tip 3a having a rounded shape is formed on one end side for easy writing.

On the other hand, the pen body 2 is formed in the shape of an elongated rod having a hexagonal cross section, and has a radius of about 3-5 mm.
The length is about 100-150 mm. Further, a hole 4 corresponding to the pen tip portion 3 is formed at the center of the pen body portion 2, and the pen tip portion 3 is inserted into the hole 4 with the pen tip 3a protruding from one end side. And is fixed with an adhesive (not shown).

In the input pen 1 thus formed, when the pen tip 3a is scraped due to use and becomes unusable, a pen body 2 and a pen tip portion are used by using a knife or a pencil sharpener. If you delete 3, you can use it again.
In this case, since the pen body 2 is made of wood, cutting is easy. In addition, even when the shape of the pen tip does not suit the operator's preference, the pen tip can be used by shaping it to obtain a desired writing comfort. Further, it is possible to prepare some input pens 1 in which the material of the pen tip portion 3 is changed and to freely select and use one that meets the operator's preference.

The input pen 1 shown in the first embodiment has been disclosed in which the pen body 2 has a hexagonal cross section, but the invention is not limited to this. It can be a triangle, a quadrangle, a pentagon, a polygon with more than a heptagon,
Furthermore, the cross-section may be circular as shown in FIGS. 5 and 6. Here, in FIGS. 5 and 6, the same reference numerals as those in FIGS. 1 to 4 denote the same as those in FIGS.

7 and 8 show a second embodiment of an input pen for a terminal device according to the present invention. FIG. 7 is a schematic sectional view thereof, and FIG. 8 is an exploded sectional view of its essential part. In FIGS. 7 and 8, the input pen 11 has a pen body 12
And a pen tip portion 13 and a pen tip feeding mechanism portion 15.

More specifically, the pen tip 13 is made of a hard plastic such as polyacetal (Duracon), and is formed in an elongated cylindrical shape having a radius of 1 to 1.5 mm and a length of 70 to 100 mm. Further, a pen tip 13a having a rounded shape is formed on one end side for easy writing.

On the other hand, the pen body 12 is made of wood or plastic and is formed in the shape of an elongated rod having a hexagonal or circular cross section, and has a radius of about 3-5 mm and a length of 100-.
The size is about 150 mm. Further, at the center of the pen body 12, a hole 14 for accommodating the pen tip delivery mechanism 15 is formed.

The pen delivery mechanism 15 is of a knock type or a rotary type and has a radius of 1.5 to 3 mm and a length of 100.
It is formed in an elongated cylindrical shape of about 150 mm, and an operation knob 16 for sending out the pen tip is attached to one end side. After the pen tip portion 13 is inserted into the pen tip delivery mechanism portion 15, the operation knob 16 is inserted into the pen body portion 12 in a state of protruding from the rear end side of the pen body portion 12 and assembled. . Then, when the operation knob 16 is knocked or rotated, the pen tip portion 13 is gradually projected from the inside of the pen tip delivery mechanism portion 15 in association with this operation, whereby the pen tip portion 13 protruded from the pen main body portion 12. It is structured so that the amount of can be adjusted. It should be noted that the feeding structure of the pen tip portion 13 in the pen tip feeding mechanism portion 15 may be, for example, a knock type or rotary type mechanical pencil, and the same structure as a generally well-known centering mechanism may be used. It is a thing.

Therefore, in the input pen 11 thus formed, when the pen tip 13a is scraped due to use and becomes unusable, the pen feed mechanism 15 is operated via the operation knob 16 and the pen is moved. The pen tip portion 13 is gradually fed out from the inside of the feed mechanism portion 15, and this is projected from the tip of the pen main body portion 12 so that it can be reused. Further, by cutting the projected pen tip 13a with a knife or the like, the pen tip 13a can be formed into a shape suitable for the operator's writing comfort. Further, it is possible to prepare some input pens 11 in which the material of the pen tip portion 13 is changed and replace them with ones suitable for the operator's preference.

9 to 12 show a third embodiment of the input pen for a terminal device according to the present invention. FIG. 9 is a sectional view taken along the line CC of FIG. 11, and FIG. 10 is its exploded sectional view. Figure, Figure 1
1 is an external side view thereof, and FIG. 12 is an end view thereof. FIG.
12 to 12, the input pen 21 includes a wooden pen body 22 and a plastic pen tip 23.

More specifically, the pen nib 23 is made of a hard plastic such as polyacetal (Duracon), and is formed in an elongated cylindrical shape having a radius of 1 to 1.5 mm and a length of 100 to 150 mm. The pen tip 23
As shown in an enlarged view of a main part in FIG. 13, a plurality of divided pen tip pieces 23A are connected to each other to form a single elongated cylindrical shape. Each pen tip piece 23A has a radius of 1 mm. ~ 1.
It is formed with a size of about 5 mm and a length of about 10 mm. Also, a pen tip 23a rounded for easy writing is formed on one end side of each pen tip piece 23A, and a concave portion 23b into which the pen tip 23a can be inserted and fitted is formed on the other end side. Has been done. And the second nib piece 2
Insert the nib 23a of 3A into the recess 23b of the first nib piece 23A and fit it, and insert the nib 23a of the third nib piece 23A into the recess 23b of the second nib piece 23A. As it is said to be fitted, each pen tip piece 23A is connected in order, and each fitted portion is fixed with a weak adhesive to form a columnar shape. When it is bent, it has a structure that can be removed and removed at that part. In FIG. 13, a pen point piece 23A indicated by a reference numeral (23A) shows a state in which the pen point 23a is scraped to make it unusable, and the pen point piece 23A is broken and removed.

On the other hand, the pen body 22 is formed in the shape of an elongated rod having a hexagonal cross section, and has a radius of about 3 to 5 mm and a length of about 100 to 150 mm. In addition, a hole 24 corresponding to the pen tip portion 23 is formed in the center of the pen body portion 22, and the pen tip portion 2 a is made to project from the one end side in the hole 24.
3 is inserted and fixed by an adhesive agent (not shown) to be integrated.

In the input pen 21 thus formed, if the pen tip 23a is scraped by use and becomes unusable, the pen tip 23 (23) becomes unusable.
A) can be deleted and removed. When the amount of protrusion from the pen body 22 becomes small, the pen body 22 and the pen tip 23 can be reused by scraping the pen body 22 and the pen tip 23 with a knife or a pencil sharpener. Also,
Even when it does not suit the operator's taste, the pen tip 23a or the like may be shaved to change the roundness or the like so that the shape can be used to obtain a desired writing comfort. Further, the input pen 21 in which the material of the pen tip portion 23 is changed
It is also possible to prepare some of them and freely select and use one that suits the operator's preference.

In the input pen 21 shown in the third embodiment, the pen body 22 has a hexagonal cross section, but the invention is not limited to this. It can be a quadrangle, a pentagon, a polygon with more than a heptagon,
Further, the cross-section may have a circular shape as shown in FIGS. 14 and 15. Here, FIG.
4 and FIG. 15 are denoted by the same reference numerals as those in FIGS. 9 to 12 and are the same as those in FIGS. 9 to 12.

16 and 17 show a fourth embodiment of the input pen for a terminal device according to the present invention. FIG. 16 is a schematic sectional view and FIG. 17 is an exploded sectional view of its main part. FIG.
6 and 17, the input pen 31 is composed of a pen body 32, a pen tip 23, and a pen tip delivery mechanism 35. In addition, the pen tip portion 2 in the fourth embodiment
3 is the pen tip portion 2 shown in the embodiment shown in FIGS.
It is formed with the same structure as 3. That is, the pen tip 2
3 is formed into one elongated cylindrical shape by connecting the pen tip pieces 23A divided into a plurality of pieces with a weak adhesive, and when the joined part is bent again, it can be removed and removed at that part. It has a structure that allows it.

On the other hand, the pen body 32 is made of wood or plastic and is formed in the shape of an elongated rod having a hexagonal or circular cross section. The radius is about 3 to 5 mm and the length is 100 to 100 mm.
The size is about 150 mm. At the center of the pen body 32, a hole 34 for accommodating the pen tip delivery mechanism 35 is formed.

The pen tip delivery mechanism portion 35 is of a knock type or a rotary type and has a radius of 1.5 to 3 mm and a length of 10 mm.
It is formed in an elongated cylindrical shape of about 0 to 150 mm, and an operation knob 36 for sending out the pen tip is attached to one end side. After the pen tip portion 23 is inserted into the pen tip delivery mechanism portion 35, the operation knob 36 is inserted into the pen body portion 32 in a state of protruding from the rear end side of the pen body portion 32 and assembled. . Then, when the operation knob 36 is knocked or rotated, the pen tip portion 23 gradually protrudes from the inside of the pen tip delivery mechanism portion 35 in association with this operation, whereby the pen tip portion 23 protruded from the pen body portion 32. It is structured so that the amount of can be adjusted. Note that the feeding structure of the pen tip 23 in the pen tip feeding mechanism unit 35 may be the same as that of a generally well-known centering mechanism, which is used in, for example, a knock type or rotary type mechanical pencil. It is a thing.

Therefore, in the input pen 31 thus formed, when the pen tip 23a is scraped due to use and becomes unusable, the pen tip feed mechanism 35 is operated via the operation knob 36, and the pen tip 23a is operated. Advance mechanism 35
The pen tip portion 23 is gradually sent out from the inside, and this is projected from the tip 23a of the pen body portion 32. This allows
It can be used in any desired length. Further, the pen tip piece (23A) which has become unusable can be bent and removed. Further, by cutting the projected pen tip 23a with a knife or the like, the pen tip 23a can be used in a shape suitable for the operator's writing comfort. Further, it is possible to prepare some input pens 31 in which the material of the pen tip portion 23 is changed and to use them by exchanging them with ones suitable for the operator.

18 and 19 show a fifth embodiment of an input pen for a terminal device according to the present invention. FIG. 18 is its sectional view and FIG. 19 is its exploded sectional view. 18 and 19, the input pen 41 is composed of a plastic or wooden pen body 42 and a plastic pen tip 43.

More specifically, the pen tip portion 43 is made of durable hard plastic such as polyacetal (Duracon), and is formed in an elongated cylindrical shape having a radius of 1 to 1.5 mm and a length of 30 to 60 mm. ing. Further, a pen tip 43a having a rounded shape is formed on one end side for easy writing, and a male screw 4 is formed on the peripheral surface on the other end side.
3b is formed.

On the other hand, the pen main body 42 is made of plastic or wood which has a hardness different from that of the pen tip 43 and which is easy to transmit vibration, and is formed in an elongated rod shape having a circular or square cross section. Radius about 3-5 mm, length 100-
The size is about 150 mm. Further, one end side of the pen main body 42 is formed in a conical shape so as to gradually narrow toward the center as it goes to this end.
Further, a hole 44 corresponding to the pen tip portion 43 is formed at the center on the one end side. A female screw 44a corresponding to the male screw 43b of the pen tip portion 43 is formed in the hole 44. The male screw 43b is screwed into the female screw 44a to project the pen tip 43a from the tip of the pen body portion 42. In this state, the pen tip 43 is attached to the pen body 42 for use.

In the input pen 41 thus formed, when the pen tip 43a is scraped due to use and becomes unusable, the screw connection between the male screw 43b and the female screw 44a is released to remove the pen tip portion. It can be used again by removing 43 from the pen body 42 and replacing it with a new pen tip 43.

Therefore, according to the structure of the fifth embodiment, the pen tip portion 43 and the pen body portion 42 are formed separately,
Since it can be attached and detached by screw connection, only the pen tip portion 43 can be replaced even if the pen tip 43a is scraped by use and cannot be used, which is economically advantageous. Further, the pen tip portion 43 and the pen body portion 4 made of different materials are used.
Several kinds of 2 are prepared respectively, and the combination can realize a user's favorite feeling of use and improve writing comfort.

20 and 21 show a modification of the fifth embodiment shown in FIGS. 18 and 19, FIG. 20 being a sectional view thereof, and FIG. 21 being an exploded sectional view thereof. 20 and 21, the same reference numerals as those in FIGS. 18 and 19 denote the same parts as those in FIGS. 18 and 19. And in the modification shown in FIG.20 and FIG.21, the pen point part 43
The male screw 43b is formed in the middle portion of the above, and both ends of the male screw 43b are used as the pen tip 43a. With this structure, when the pen tip 43a on one side is scraped due to use and the pen tip 43a becomes unusable, the pen tip portion 43 can be replaced and used again, and one pen tip portion 43 can be replaced twice. It is what

22 and 23 show a sixth embodiment of the input pen for a terminal device according to the present invention. FIG. 22 is its sectional view and FIG. 23 is its exploded sectional view. 22 and 23, the input pen 51 includes a pen tip portion 52, a pen body portion 53, and a pen tip portion pressing component 54. More specifically, the pen tip 52 is made of durable hard plastic such as polyacetal (Duracon), and is formed in an elongated cylindrical shape having a radius of 1 to 1.5 mm and a length of 30 to 60 mm. In addition, a pen tip 52a is formed on one end so as to be easy to write, and the other end has a radius of 1.5 to 3 mm and a thickness of 2 to
A stopper 52b of about 5 mm is formed.

The pen tip part pressing part 54 is made of plastic and is formed into a cylindrical shape having a radius of 1.5 to 3 mm and a length of 40 to 120 mm, and has a fitting part 55 for attaching to the pen body part 53 at one end. Are formed.

On the other hand, the pen main body 53 is made of plastic or wood having a hardness different from that of the pen tip 52 and is easy to transmit vibration, and is formed in an elongated rod shape having a circular or square cross section. Radius about 3-5 mm, length 100-
The size is about 150 mm. Further, one end of the pen body 53 is formed in a conical shape so as to gradually narrow toward the center as it goes to this end.
Further, a hole 56 having a radius of about 1 to 1.5 mm from the one end to a depth of 30 to 60 mm is provided so that the pen tip portion 52 can be inserted, and the depth of 30 to 60 mm. A hole 57 having a radius of about 1.5 to 3 mm is provided in the remaining portion from to the other end so that the pen tip pressing member 54 can be inserted. Therefore, a step 59 is formed between the hole 56 and the hole 57. In addition, a fitting portion 58 for mounting the fitting portion 55 of the pen tip portion pressing component 54 is formed on the other end side of the pen body 53.

With the input pen 51 thus constructed,
When assembling, first the fitting portion 58 of the pen body 53
The pen tip portion 52 is inserted into the pen body portion 53 from the pen tip 52a side through the hole 57 at one end where the pen tip 52a is formed, and the pen tip 52a is fitted into the hole 56. Next, the pen point pressing part 54 is inserted into the hole 57 of the pen body 53 from the side where the fitting part 55 is not formed until the fitting part 55 and the fitting part 58 are engaged with each other. Then, the input pen can be used.

In the input pen 51 thus formed, when the pen tip 52a is scraped due to use and becomes unusable, the pen tip pressing member 54 is removed from the pen body 53, Remove the pen tip 52,
It can be used by replacing it with a new pen nib 52.

Therefore, according to the structure of the sixth embodiment, the pen tip portion 52 and the pen body portion 53 are formed separately,
Only the nib 52 can be easily replaced by the nib pressing part 54 pressing the nib 52. Thereby, even when the pen tip 52a is scraped by use and cannot be used, only the pen tip portion 52 can be replaced.
Economically advantageous. Also, the pen tip 5 made of different material
2 and the pen body 53 are prepared in several types, respectively, and by combining them, the operator's favorite feeling of use can be realized and the writing comfort can be improved.

24 and 25 show a modification of the sixth embodiment shown in FIGS. 22 and 23. FIG. 24 is its sectional view and FIG. 25 is its exploded sectional view. 24 and 25, the same reference numerals as those in FIGS. 22 and 23 denote the same parts as those in FIGS. 22 and 23. Then, in the modification example shown in FIGS. 24 and 25, the pen tip portion 52
The stopper 52b is formed in the middle portion of the above, and both ends of the stopper 52b are used as the pen tip 52a. Further, a concave portion 54b for receiving the pen tip 52a on one side is formed at the center of the pen tip portion pressing component 54. With this structure, when the pen nib 52a on one side is scraped due to use and becomes unusable, the pen nib 52 can be replaced and used again.
It can be exchanged once.

[0040]

As described above, according to the present invention,
It is possible to easily realize an input pen having a pen tip that provides the writing comfort that suits the operator's taste.

[Brief description of drawings]

FIG. 1 is a sectional view of an input pen shown as a first embodiment of the present invention.

FIG. 2 is an exploded cross-sectional view of the input pen shown as the first embodiment of the present invention.

FIG. 3 is an external side view of the input pen shown as the first embodiment of the present invention.

FIG. 4 is an end view of the input pen shown as the first embodiment of the present invention.

FIG. 5 is an external side view of an input pen shown as a modification of the first embodiment.

FIG. 6 is an end view of an input pen shown as a modification of the first embodiment.

FIG. 7 is a sectional view of an input pen shown as a second embodiment of the present invention.

FIG. 8 is an exploded sectional view of an input pen shown as a second embodiment of the present invention.

FIG. 9 is a sectional view of an input pen shown as a third embodiment of the present invention.

FIG. 10 is an exploded sectional view of an input pen shown as a third embodiment of the present invention.

FIG. 11 is an external side view of the input pen shown as the third embodiment of the present invention.

FIG. 12 is an end view of the input pen shown as the third embodiment of the present invention.

FIG. 13 is an explanatory diagram of a main part structure of a third embodiment.

FIG. 14 is an external side view of an input pen shown as a modification of the third embodiment.

FIG. 15 is an end view of an input pen shown as a modification of the third embodiment.

FIG. 16 is a sectional view of an input pen shown as a fourth embodiment of the present invention.

FIG. 17 is an exploded sectional view of an input pen shown as a fourth embodiment of the present invention.

FIG. 18 is a sectional view of an input pen shown as a fifth embodiment of the present invention.

FIG. 19 is an exploded sectional view of an input pen shown as a fifth embodiment of the present invention.

FIG. 20 is a sectional view of an input pen shown as a modification of the fifth embodiment.

FIG. 21 is an exploded sectional view of an input pen shown as a modification of the fifth embodiment.

FIG. 22 is a sectional view of an input pen shown as a sixth embodiment of the present invention.

FIG. 23 is an exploded sectional view of an input pen shown as a sixth embodiment of the present invention.

FIG. 24 is a sectional view of an input pen shown as a modification of the sixth embodiment.

FIG. 25 is an exploded sectional view of an input pen shown as a modification of the sixth embodiment.

FIG. 26 is a side view showing an example of a conventional input pen.

FIG. 27 is a side view showing another example of the conventional input pen.

[Explanation of symbols]

 1,11,21,31,41,51 Input pen 2,12,22,32,42,53 Pen body part 3,13,23,43,52 Pen tip part 3a, 13a, 23a, 43a, 52a Pen tip 4, 14, 24, 34, 44 holes 15 Pen tip feeding mechanism 23A Pen tip 23b Recess 43b Male screw 44a Female screw 52b Stopper 54 Pen tip pressing part

Claims (13)

[Claims] 1. A terminal device input pen having a pen tip protruding from one end of a pen body, wherein the pen body is made of wood, and a hole is provided substantially at the center of the pen body. At the same time, a slender cylindrical plastic nib portion having a pen tip formed at the tip and having substantially the same length as the hole is inserted and fixed in the hole of the pen body portion. Input pen for terminal device. 2. The terminal device input pen according to claim 1, wherein the pen body has an outer shape formed in a polygonal cross section. 3. The input pen for a terminal device according to claim 1, wherein the pen body has an outer shape formed in a circular cross section. 4. The nib portion is formed by connecting a plurality of nib pieces, and the nib portion is folded at each nib piece to form a 1
The input pen for a terminal device according to claim 1, wherein the input pen is detachably provided in order. 5. The input pen for a terminal device according to claim 4, wherein an outer shape of the pen body is formed in a polygonal shape in cross section. 6. The input pen for a terminal device according to claim 4, wherein the pen body has an outer shape formed in a circular cross section. 7. An input pen for a terminal device, which has a pen tip protruding from one end side of the pen body, wherein the pen body is made of wood or plastic, and the pen body has a hole at substantially the center thereof. And a pen tip portion made of a slender columnar plastic having a pen tip formed at the tip, and an operation knob at one end, and the pen tip portion is housed inside the pen body. An input pen for a terminal device, comprising: a pen tip feeding mechanism portion that is arranged in the hole of a portion and that can feed the pen tip portion when the operation knob is knocked or rotated. 8. An input pen for a terminal device, comprising a pen tip protruding from one end side of a pen body, wherein a hole is provided at substantially the center of the pen body, and the pen tip is formed at the tip. It is formed into a cylindrical shape by connecting a plurality of elongated pen nibs, and it is a cylindrical plastic nib that can be removed in turn by folding each pen nib. A pen which has an operation knob at one end and accommodates the pen tip portion inside and is arranged in the hole of the pen body portion, and which can eject the pen tip portion by knocking or rotating the operation knob. An input pen for a terminal device, comprising: a front feeding mechanism. 9. An input pen for a terminal device, which has a pen tip protruding from one end side of a pen body, wherein a hole is provided at substantially the center of the pen body, and the pen tip is formed at the tip. An input pen for a terminal device, characterized in that a slender cylindrical plastic pen tip portion is made removable and is inserted and fixed in the hole. 10. A female screw portion is formed on the inner peripheral surface of the hole, and a male screw portion that can be screwed into the female screw portion is provided on the outer peripheral surface of the pen tip portion, and the female screw and the male screw are screwed together. The terminal device input pen according to claim 9, wherein the pen tip portion and the pen body are fixed by the. 11. The input pen for a terminal device according to claim 10, wherein the male screw portion is formed in a substantially middle portion of the pen tip portion so that the pen tip portion can be attached with the front and rear facing the opposite direction. . 12. A step is formed on the inner peripheral surface of the hole, and a stopper is provided on the outer peripheral surface of the pen tip portion so as to come into contact with the step portion, and the step portion and the stopper are engaged with each other. The input pen for a terminal device according to claim 9, further comprising: a pen tip holding component for positioning the pen tip portion and the pen body and pressing the pen tip against the pen body. 13. The input pen for a terminal device according to claim 12, wherein the stopper is formed in a substantially middle portion of the pen tip portion so that the pen tip portion can be attached with its front and back reversed.