JP2010076281A - Multiple writing implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multiple writing implement having a plurality of different inside diameter tube bodies which can arbitrarily select their attachment positions. <P>SOLUTION: A fitting member 30 is attached at the rear end of a tube body 4S of a mechanical pencil refill 3S so that the mechanical pencil refill 3S can be connected through the fitting member 30 to the sliders 20 of which the specification is designed to fit ballpoint pen refills 3B, 3R. Thereby, even after the start of use of the multiple writing implement 1, the slider 20 serviceable to connect either of the ballpoint pen refills 3B, 3R and the mechanical pencil refill 3S can be selected, and furthermore, one of the sliders 20 can be arbitrarily selected as the serviceable slider 20, and the attachment positions of the ballpoint pen refills 3B, 3R and the mechanical pencil refill 3S can also be arbitrarily changed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  According to the present invention, when a tip of one writing body is protruded from a tip end of a shaft cylinder among a plurality of types of writing bodies stored in a cylindrical cylinder, writing with the writing body can be performed. The present invention relates to a compound writing instrument that is formed in such a manner that a single type of writing instrument can be used.

2. Description of the Related Art Conventionally, a double-type writing instrument has been used in which a single type of writing instrument can be used for writing. As such a dual-type writing instrument, a plurality of types of writing bodies each including a cylindrical shaft cylinder having a tip opening opened at a tapered tip, each including an elongated cylindrical body, are provided in the shaft cylinder. Is widely used when a selected cursive letter is selected and the tip of the selected cursive letter is protruded from the above-mentioned tip opening.
Here, the shaft tube is provided with a plurality of guide slits that are elongated along the axial direction of the shaft tube and are arranged along the circumferential direction on the side surface near the rear end of the shaft tube. Each of the guide slits is provided with a slider that can slide along the longitudinal direction of the guide slit. Each of these sliders is in contact with the rear end of the corresponding cursive body.

Among these sliders, if you select the slider corresponding to the cursive you want to use for writing and slide the selected slider toward the tip side of the barrel, this slider will press the corresponding cursive, The tip of the corresponding writing body is projected from the tip end of the shaft cylinder, so that writing can be performed with the selected writing body. (For example, refer to Patent Document 1).
JP 2006-221940 A

In the above-mentioned double writing instrument, when a plurality of types of writing bodies having different inner diameters are adopted as the writing body stored in the shaft cylinder, the slider of one type of writing body has this It is not possible to connect a cursive body with a different inner diameter of the cylinder from the cursive body, and it is not possible to select any one slider as a connection target for each cursive body. There is a problem that the attachment position of the body cannot be selected arbitrarily.
For example, if a ballpoint pen refill with a ballpoint pen writing mechanism and a mechanical pencil refill with a mechanical pencil writing mechanism are used as the writing body stored inside the shaft tube, the ballpoint pen A mechanical pencil refill cannot be connected to the slider to which the refill is connected. Conversely, a ball pen refill cannot be connected to the slider to which the mechanical pencil refill is connected. There is a problem that the refill mounting position cannot be arbitrarily selected.

  Therefore, the present invention has been made in view of the problems of the above-described background art, and the object of the present invention is to arbitrarily select the mounting position of a plurality of types of writing bodies having different inner diameters of the cylinders. It is to provide a dual writing instrument that can.

Each invention has been made to achieve the above-mentioned object. The features of each invention will be described below with reference to the embodiments of the invention shown in the drawings.
In addition, a code | symbol shows the code | symbol used in embodiment of this invention, and does not limit the technical scope of this invention.
(First invention)
(Feature point)
The first aspect of the present invention is characterized by the following points.
That is, the first invention of the present invention comprises a plurality of types of writing bodies (3) each including a cylindrical body (4),
A shaft cylinder (10) formed so as to accommodate these cursive bodies (3) so as to be movable along the axial direction and including a cylindrical portion that can be separated into two parts;
In order to make the front end of one cursive body (3) out of the plurality of cursive bodies (3) protrude from the front end of the shaft cylinder (10), a front end opening ( 15) and
A plurality of guide slits (16) arranged along the circumferential direction on the side surface in the vicinity of the rear end of the shaft tube (10), with the axial direction of the shaft tube (10) being opened as a longitudinal direction,
Each of the guide slits (16) is guided by each of the guide slits (16) so as to be slidable in the axial direction of the shaft cylinder (10), and the rear end of the corresponding writing body (3) is detachably connected. And a plurality of sliders (20) provided,
Among the plurality of sliders (20), when any one slider (20) is slid toward the tip side of the shaft tube (10), the corresponding cursive body pressed by the slider (20) ( 3) a writing instrument (1) formed such that the tip of 3) protrudes from the tip opening (15) of the shaft tube (10) to enable writing;
The slider (20) has a dimension in which the outer diameter of the tip end corresponds to the inner diameter of the cylinder (4) in order to fit the tip end into the rear end opening of the cylinder (4). And
As the cursive body (3), the portion that fits into the slider (20) is the cylinder body (4) itself, and the inner diameter of the cylinder body (4) is a standard diameter that is a predetermined standard dimension. Cursive (3B, 3R),
A tubular joint member (30) is attached to the rear end of the tubular body (4), and a different-diameter writing body (30S) to be fitted to the slider (20) by the joint member (30) is provided. And
The joint member (30) has a rear end opened, and the inner diameter of the opening is set to the outer diameter of the front end of the slider (20) in order to fit the front end of the slider (20) in the opening. The corresponding dimensions,
The sliders (20) to be connected to each of the different-diameter writing body (3S) and the standard-diameter writing body (3B, 3R) to which the joint member (30) is attached include a plurality of sliders (20). 20), any one slider (20) can be selected.

(Second invention)
(Feature point)
The second invention of the present invention is obtained by adding the following feature points to the first invention of the present invention described above.
That is, the second invention of the present invention is characterized in that an outer diameter of the different-diameter writing body is smaller than an outer diameter of the standard-diameter writing body.
(Third invention)
(Feature point)
The third invention of the present invention is obtained by adding the following feature points to the first or second invention of the present invention described above.

  That is, in the third invention of the present invention, the standard-diameter writing body (3) is a ball-point refill (3B, 3R) provided with a ball-point pen writing mechanism, and the different-diameter writing body (3) is a mechanical pencil. The mechanical pencil refill (3S) is equipped with a writing mechanism.

(Effect of the first invention)
The present invention configured as described above has the following effects.
That is, according to the first invention of the present invention, even if a standard-diameter writing body and a different-diameter writing body having different inner diameters at locations where the slider is fitted to each other are accommodated in the shaft cylinder, A cylindrical joint member having an inner diameter corresponding to the outer diameter of the front end of the slider is attached to the rear end of the cylindrical body of a different-diameter handwriting so that the front end of the slider is fitted into the rear end opening of the joint member. Therefore, the slide for standard diameter cursives and the slider for different diameter cursives become parts of the same specification, and for the sliders to which standard diameter cursives are connected, the connected standard diameter cursives can be removed. In this case, it becomes possible to connect the different-diameter writing bodies via the joint member.

Therefore, when selecting the slider to be connected to each of the different-diameter writing body and the standard-diameter writing body to which the joint member is attached, any one of the plurality of sliders can be selected. For this reason, the attachment position can be arbitrarily selected with respect to a plurality of types of writing bodies, and thereby the object is achieved.
(Effect of the second invention)
According to the second invention of the present invention, in addition to the effects of the first invention of the present invention described above, the following effects can be obtained.
That is, according to the second invention of the present invention, as a plurality of writing bodies, when adopting a standard diameter writing body and a different diameter writing body having an outer diameter smaller than the outer diameter of the standard diameter writing body, So, even if it is not possible to connect the slider of the same specification to both the standard diameter cursive and the different diameter cursive, it was designed for the standard diameter cursive by the joint member attached to the cylindrical end of the different diameter cursive Different diameter cursives can be connected to the specified slider, so if all standard installations are equipped with sliders for standard diameter cursives, either standard or cursive writings can be used for all installation positions. Can be installed, and the attachment positions of the standard-diameter and different-diameter scripts can be arbitrarily selected.

(Effect of the third invention)
According to the third aspect of the present invention, in addition to the effects of the first aspect or the second aspect of the present invention described above, the following effects can be obtained.
That is, according to the third aspect of the present invention, even if a ball pencil refill and a mechanical pencil refill with different inner diameters are accommodated in the shaft cylinder, a joint is attached to the rear end of the mechanical pencil refill cylinder. By attaching a member, it becomes possible to connect a mechanical pencil refill to a slider designed for ballpoint pen refill. Therefore, when selecting a slider to be connected to each of the ballpoint pen refill and the mechanical pencil refill, Any one slider can be selected, and the attachment positions of the ballpoint pen refill and the mechanical pencil refill can be arbitrarily selected.

Hereinafter, an embodiment which is the best mode for carrying out the present invention will be described with reference to the drawings.
1 to 8 show this embodiment. 1 is a side view showing a dual writing instrument according to the present embodiment, FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2 is a sectional view taken along line IV-IV in FIG. 2, FIG. 5 is a sectional view taken along line V-V in FIG. 4, FIG. 6 is a side view and sectional view showing the mechanical pencil writing state of the present embodiment, and FIG. FIG. 8 is a side view and cross-sectional view showing a mechanical pencil refill according to the present embodiment.

In addition, the front end in a writing instrument refers to the edge part which contacts writing objects, such as paper, among the both ends of a shaft cylinder, and the rear end in a writing instrument refers to the edge part on the opposite side of a shaft cylinder.
(Double writing instrument 1)
As shown in FIGS. 1 to 3, the compound writing instrument 1 according to the present embodiment includes a cylindrical shaft cylinder 10 having a hollow inside, a plurality of types of writing bodies 3, specifically, as shown in FIG. 2. Black ballpoint pen refill 3B with black oil ballpoint pen writing mechanism, red ballpoint refill 3R with red oil ballpoint pen writing mechanism, and mechanical pencil refill 3S with mechanical pencil writing mechanism ing.

The writing instrument 1 includes a cylindrical body 4 formed in an elongated cylindrical shape. Specifically, the black ballpoint pen refill 3B, the red ballpoint pen refill 3R, and the mechanical pencil refill 3S are formed to include the cylinders 4B, 4R, and 4S, respectively. Such a cursive 3 will be described in detail later. Needless to say, the writing color of the ballpoint pen refill is not limited to black and red.
The shaft tube 10 is formed to contain a black ballpoint pen refill 3B, a red ballpoint pen refill 3R, and a mechanical pencil refill 3S movably along the axial direction, and including a cylindrical portion that can be separated into two. It is a thing.

That is, the shaft tube 10 is disposed on the left side in FIG. 1 and can be divided into a tapered tip portion 11 and a rear shaft portion 12 having substantially the same diameter over the entire length.
Here, a male screw portion 13 is formed on the outer peripheral surface in the vicinity of the end portion disposed on the rear shaft portion 12 side of the front shaft portion 11. On the other hand, on the inner peripheral surface in the vicinity of the end portion disposed on the front shaft portion 11 side of the rear shaft portion 12, a female screw portion 14 that is screwed with the male screw portion 13 on the front shaft portion 11 side is formed. Thereby, the front shaft portion 11 and the rear shaft portion 12 are connected to each other by the screw numbers of the male screw portion 13 and the female screw portion 14, and by releasing the screw numbers of the male screw portion 13 and the female screw portion 14, Separation is possible.
As shown in FIG. 3, at the tip of the front shaft portion 11, one of the black ball pen refill 3B, the red ball pen refill 3R, and the mechanical pencil refill 3S is projected from the tip of the front shaft portion 11. An open front end 15 is formed.

In the vicinity of the rear end of the rear shaft portion 12, as shown in FIG. 1, an elongated opening is formed along the axial direction of the shaft tube 10. A plurality of guide slits 16 arranged in the circumferential direction are provided on the side surface near the end. The number of guide slits 16 provided is three in correspondence with the number of cursive letters, that is, in this embodiment, the black ball pen refill 3B, the red ball pen refill 3R, and the mechanical pencil refill 3S.
Each of these guide slits 16 is fitted with a slider 20 formed in a rod shape that is slightly longer than the entire length of the guide slit 16 as shown in FIG. 4 shows the dual writing instrument 1 with the black ball pen refill 3B, the red ball pen refill 3R, and the mechanical pencil refill 3S removed from the inside of the shaft tube 10.

The slider 20 is provided corresponding to the three writing bodies 3, and the corresponding one is operated by the user so that the tip of one writing body 3 protrudes from the tip opening 15 of the shaft tube 10. It is a part.
Such a slider 20 is provided so as to be slidable in the axial direction of the shaft tube 10 while being guided by inner peripheral surfaces arranged on both sides in the longitudinal direction of the inner peripheral surface of the guide slit 16.
Here, the tip of the slider 20 is provided with a pin-like insertion protrusion 21 that is thinner than the other portions, as shown in FIG.
Near the rear end of each slider 20, a fin-like finger hooking portion 22 that protrudes radially outward of the shaft tube 10 and a trapezoidal locked portion 23 that protrudes radially inward of the shaft tube 10 are provided. It has been.

Further, each slider 20 has a position shifted to the tip side from the locked portion 23 in order to lock the locked portion 23 of the other slider 20 moved to the tip side of the shaft tube 10. A locking portion 24 that protrudes inward in the radial direction of the shaft tube 10 from the surface is provided.
On the other hand, a partition member 17 that partitions the inner space of the rear shaft portion 12 into a front end side and a rear end side is provided inside the rear shaft portion 12 of the shaft cylinder 10.
As shown in FIG. 5, a plurality (three places) of the partition members 17 are inserted in order to insert the plurality (three) of the cylinders 4 of the writing body 3 housed in the shaft cylinder 10. A cylindrical insertion hole 17A is formed.

Returning to FIG. 4, a plurality of recoil springs 25 are interposed between the partition member 17 and the slider 20 in order to bias the slider 20 toward the rear end. Each of the recoil springs 25 is a compression coil spring in which a piano wire is wound in a string form.
Here, the cylinder insertion hole 17A of the partition member 17 has an inner diameter larger than the outer diameter of the cylinder 4 of the writing body 3 and smaller than the outer diameter of the recoil spring 25. As a result, the cylinder 4 of the writing body 3 passes through the cylinder insertion hole 17A from the rear end side of the partition member 17 to the front end side. On the other hand, since the recoil spring 25 cannot pass through the cylindrical body insertion hole 17A, the recoil spring 25 is compressed between the partition member 17 and the slider 20, thereby constantly biasing the slider 20 to the rear end side. ing.

Further, as shown in FIG. 5, the cylindrical body insertion holes 17 </ b> A of the partition member 17 are arranged so as to be arranged at equal intervals in the circumferential direction of the axial cylinder 10 in a cross section perpendicular to the central axis of the axial cylinder 10.
As shown in FIG. 5, an installation position α in which the writing body 3 is installed at a position overlapping the three cylindrical insertion holes 17A in a cross section perpendicular to the central axis of the axial cylinder 10, as shown in FIG. , Β, and γ are set.
In the above, the double-type writing instrument 1 is pressed by the slider 20 when the user slides the finger hooking portion 22 of any one of the plurality of sliders 20 toward the distal end side of the shaft tube 10. The writing body 3 is formed such that the tip protrudes from the tip opening 15 of the shaft tube 10 and writing with the writing body 3 is possible.

That is, as shown in FIG. 6B, the slider 20 has an insertion protrusion 21 formed at the tip thereof inserted into the rear end of the writing body 3 and is connected to the writing body 3. ing.
Here, the oil-based ballpoint refill such as the black ballpoint refill 3B and the red ballpoint refill 3R is configured such that the cylinder 4 is directly connected to the slider 20. On the other hand, the mechanical pencil refill 3S is configured such that its cylindrical body 4S is indirectly connected to the slider 20 via a joint member 30 described later.
When the user slides the slider 20 toward the distal end side of the shaft tube 10 against the elastic force of the recoil spring 25, the handwriting 3 has its tip at the shaft tube 10 as shown in FIG. It protrudes from the tip port 15. In FIG. 6, the cursive body 3 whose tip protrudes from the tip opening 15 of the barrel 10 is a mechanical pencil refill 3S.

At this time, if the user applies a force to the finger hooking portion 22 of the slider 20 to slide toward the tip end side of the shaft tube 10, the finger hooking portion 22 of the slider 20 moves toward the radially inner side of the shaft tube 10. The power to go is also added.
Thus, when the locked portion 23 of the slider 20 reaches a position closer to the tip than the locking portion 24 of the other slider 20, the rear end portion of the slider 20 shifts toward the central axis side of the shaft tube 10, and As shown in FIG. 6B, the locked portion 23 is locked to the locking portion 24 of the other slider 20. When the locked portion 23 is locked to the locking portion 24 of the other slider 20 in this way, the slider 20 can move the elastic force of the recoil spring 25 even if the user removes the force applied to the finger hanging portion 22. Thus, even if it is pressed toward the rear end side of the shaft tube 10, it stays in that position.

In the state where the locked portion 23 of the slider 20 is locked to the locking portion 24 of the other slider 20, the cursive body 3 has its tip even if the elastic force of the recoil spring 25 is applied to the slider 20. The state of protruding from the tip opening 15 of the shaft tube 10 is maintained.
On the other hand, the locked portion 23 of the slider 20 is locked to the locking portion 24 of the other slider 20, and the tip of the writing body 3 connected to the slider 20 extends from the tip port 15 of the shaft tube 10. In the protruding state, the slider 20, which is different from the slider 20, is slid toward the distal end side of the shaft tube 10, so that the original state, specifically, the tip of the writing body 3 is inside the shaft tube 10. It is possible to return to the state of being immersed.

That is, a force is applied to the finger hooking portion 22 of the retracted slider 20, which is different from the slider 20 moving forward to the distal end side of the shaft tube 10, and the retracted slider 20 is directed toward the distal end side of the shaft tube 10. The forward locking portion 24 of the slider 20 that is moving forward pushes the locked portion 23 of the slider 20 that is moving forward outward in the radial direction of the shaft tube 10.
When the locked portion 23 is pushed outward in the radial direction of the shaft tube 10, the moving slider 20 is released from the locked state with the locked portion 24 of another slider 20, and the locked state is released. Then, the elastic force of the recoil spring 25 retracts to the rear end side of the shaft tube 10 and returns to the original position.
The cursive body 3 connected to the slider 20 that has been moved forward is pulled by the slider 20 when the slider 20 moves backward, and the tip of the cursive body 3 moves back to a position where the tip of the shaft 10 is immersed. Accordingly, the cursive body 3 is also returned to the original position.

After the slider 20 that has been moved forward returns to its original position, it is retracted before the locked portion 23 of another slider 20 that has moved backward is locked to the locking portion 24 of the other slider 20. When the force applied to the finger hooking portion 22 of another slider 20 is removed, the other slider 20 that has moved backward is returned to its original position by the elastic force of the recoil spring 25.
Even after the slider 20 that has been moved forward returns to the original position, the force continues to be applied to the finger hooking portion 22 of another slider 20 that has moved backward, and the locked portion 23 of the other slider 20 moves to the other slider. If the locking part 24 of 20 is locked, the tip of the writing body 3 connected to the other slider 20 is projected from the tip end 15 of the shaft tube 10, and the tip of the writing body 3 is pivoted. The state of protruding from the front end 15 of the cylinder 10 can be maintained.

(Ball pen refill 3B, 3R)
As shown in FIG. 7 (A), the ballpoint pen refills 3B and 3R have a ballpoint pen tip 5 with a writing ball 5A rotatably provided at the tip and oil-based ink for writing used in the ballpoint pen tip 5. The cylinders 4B and 4R are stored. The black ballpoint pen refill 3B and the red ballpoint pen refill 3R are different in only the color of the oil-based ink for writing, and have the same structure as writing parts.
Further, as shown in FIG. 7B, the ballpoint pen refills 3B and 3R include relatively thick cylindrical bodies 4B and 4R, and the inner diameter C1 of the cylindrical bodies 4B and 4R is set to a predetermined standard dimension. It is standard diameter cursive.

Here, the slider 20 fits the insertion protrusion 21 formed at the front end thereof into the rear end opening of the cylinders 4B, 4R provided in the ballpoint pen refills 3B, 3R which are standard diameter writing bodies. For this reason, the outer diameter of the insertion projection 21 at the tip is set to a dimension corresponding to the inner diameter of the cylinders 4B and 4R. As a result, the slider 20 can be directly connected to the rear ends of the cylinders 4B, 4R of the ballpoint pen refills 3B, 3R.
The cylinders 4B and 4R of the ballpoint pen refills 3B and 3R have an outer diameter smaller than the inner diameter of the cylinder insertion hole 17A of the partition member 17, and can be freely inserted into the cylinder insertion hole 17A.
(Mechanical pencil refill 3S)
As shown in FIG. 8A, the mechanical pencil refill 3S is a tip mechanism provided with a knock type lead feeding mechanism 6 for feeding the lead 6A for the mechanical pencil little by little to the tip side according to the knocking operation of the user. It has a portion 7 and a cylindrical body 4S in which a mechanical pencil core 6A fed out by the tip mechanism portion 7 is stored.

In addition, as shown in FIG. 8B, the mechanical pencil refill 3S has a different-diameter writing body in which the inner diameter C2 of the cylindrical body 4S is different from a predetermined standard dimension.
The mechanical pencil refill 3S has a relatively thin cylindrical body 4S. Since the cylindrical body 4S is thin, the outer diameter of the cylindrical body 4S is larger than the outer diameter of the cylindrical bodies 4B and 4R of the ball pen refills 3B and 3R. Although small, the inner diameter C2 of the cylinder 4S is larger than the inner diameter C1 of the cylinders 4B and 4R of the ballpoint pen refills 3B and 3R.
Here, the mechanical pencil refill 3S which is a different-diameter writing body has a cylindrical joint member 30 attached to the rear end of the cylindrical body 4S as shown in FIG.

The joint member 30 has a rear end opened. In other words, the joint member 30 is provided with the opening 31 opened rearward.
The inner diameter of the opening 31 of the joint member 30 is set such that the inner diameter of the opening 31 is the insertion protrusion of the slider 20 so that the insertion protrusion 21 formed at the tip of the slider 20 is fitted therein. The dimension corresponds to the outer diameter of 21, that is, the inner diameter C1 of the cylinders 4B and 4R of the ballpoint pen refills 3B and 3R.
Further, the outer diameter of the joint member 30 is smaller than the inner diameter of the cylindrical body insertion hole 17A of the partition member 17, and can be freely inserted into the cylindrical body insertion hole 17A.

Further, a stepped portion 32 having an outer diameter smaller than that of the rear portion is formed on the distal end side of the joint member 30. The outer diameter of the stepped portion 32 is a dimension corresponding to the inner diameter C2 of the cylindrical body 4S provided in the mechanical pencil refill 3S. The fitting member 30 is attached to the mechanical pencil refill 3S by fitting the stepped portion 32 of the joint member 30 into the inside of the rear end opening of the cylinder 4S provided in the mechanical pencil refill 3S. When the stepped portion 32 of the joint member 30 is fitted inside the rear end opening of the cylinder 4S provided in the mechanical pencil refill 3S, the rear end opening of the cylinder 4S is sealed by the joint member 30. It has become.
At this time, if a synthetic resin excellent in wear resistance and self-lubricating, for example, polyacetal resin, polypropylene resin, polyethylene resin or polyamide resin, is used as the material constituting the joint member 30, the slider 20 can be used. On the other hand, even if the mechanical pencil refill 3S is repeatedly attached and detached, the slider 20 and the joint member 30 can be prevented from being deformed.

Also, even if the cylinder 4S of the mechanical pencil refill 3S is made of metal, the joint member 30 is connected to the slider 20, so that a self-lubricating synthetic resin such as polyacetal resin, polypropylene resin, polyethylene resin or polyamide is used. If the joint member 30 is formed of resin or the like, the mechanical pencil refill 3S can be smoothly attached to and detached from the slider 20, and the user can be prevented from feeling stress during the attachment and detachment operation.
It is possible to form the cylinder 4S of the mechanical pencil refill 3S with synthetic resin, but the operation unique to mechanical pencil refill, that is, the attachment / detachment operation when refilling the replacement core is repeated many times. In view of the above, a metal that is rigid and hardly elastically deforms is suitable for the cylindrical body 4S of the mechanical pencil refill 3S.

Furthermore, if the cylindrical joint member 30 is formed with a tapered inner peripheral surface having an inner diameter slightly smaller from the opening 31 toward the back, the mechanical pencil refill 3S is provided. The front end side of the cylindrical body 4S can swing around the front end portion of the insertion protrusion 21 formed on the slider 20.
Therefore, even if the cylinder 4S of the mechanical pencil refill 3S is made of metal, the rigidity of the cylinder 4S is high, and the cylinder 4S is not easily elastically deformed, the tip of the mechanical pencil refill 3S is placed at the tip of the shaft cylinder 10. When the slider 20 is slid toward the tip end side of the shaft cylinder 10 to protrude from the end port 15, the tip end side of the cylindrical body 4S swings with respect to the slider 20, whereby the tip of the mechanical pencil refill 3S is moved to the shaft cylinder 10. Thus, the slider 20 can be smoothly projected from the front end opening 15, so that a smooth sliding operation of the slider 20 can be ensured.

In addition, since the rear end opening of the cylinder 4S of the mechanical pencil refill 3S is sealed with the joint member 30, even if debris or core powder of the mechanical pencil core 6A is generated inside the cylinder 4S, Since dregs and core powder do not flow out of the cylindrical body 4S, the dual writing instrument 1 is not soiled by dregs and core powder, and the appearance of the dual writing instrument 1 can be kept good.
In the above, when setting the mechanical pencil refill 3S and the ballpoint pen refills 3B and 3R to which the joint member 30 is attached to the double writing instrument 1, the slider 20 to be connected to the mechanical pencil refill 3S and the ballpoint pen refills 3B and 3R. As an example, any one of the plurality of sliders 20 can be selected.

In other words, the compound writing instrument 1 can arbitrarily select the installation positions α, β, γ in FIG. 5 as the installation positions of the mechanical pencil refill 3S and the ballpoint pen refills 3B, 3R. .
For example, as a pattern of the installation position of the mechanical pencil refill 3S and the ballpoint pen refills 3B and 3R in the double writing instrument 1, the installation position α is the installation position of the mechanical pencil refill 3S, and the installation position β is the installation position of the black ballpoint refill 3B. In addition to pattern A, where the installation position γ is the installation position of the red ballpoint pen refill 3R, the installation position α is the installation position of the mechanical pencil refill 3S, and the installation position β is the installation position of the red ballpoint refill 3R. A pattern B having the position γ as the installation position of the black ballpoint pen refill 3B can also be adopted.

In addition, after starting using the compound writing instrument 1, the installation position of the writing body 3 can be changed in order to improve usability.
For example, the installation position of the mechanical pencil refill 3S arranged at the installation position α and the black ball pen refill 3B arranged at the installation position β can be exchanged with each other according to the preference of the user.
According to this embodiment as described above, the following effects can be obtained.
That is, even when the ballpoint pen refills 3B and 3R and the mechanical pencil refill 3S having different inner diameters of the cylindrical body 4 are accommodated in the shaft cylinder 10, the inner diameter C1 of the opening 31 at the rear end is at the tip of the slider 20. A cylindrical joint member 30 corresponding to the outer diameter of the formed insertion protrusion 21 is attached to the rear end of the cylinder 4S of the mechanical pencil refill 3S, and the insertion protrusion of the slider 20 is inserted into the opening 31 of the joint member 30. Since the slide 21 for the ballpoint pen refills 3B and 3R and the slider 20 for the mechanical pencil refill 3S are parts of the same specification, the slider 20 to which the ballpoint pen refills 3B and 3R are connected is also used. The mechanical pencil refill 3S can be connected via the joint member 30 by removing the connected ballpoint pen refills 3B and 3R.

Therefore, when selecting the slider 20 to be connected to each of the mechanical pencil refill 3S and the ballpoint pen refills 3B and 3R to which the joint member 30 is attached, one arbitrary slider among the plurality of sliders 20 is selected. In other words, any of the installation positions α, β, and γ can be selected. For this reason, with respect to a plurality of types of writing bodies 3 having different inner diameters of the cylinders 4, the installation positions are set as the installation positions of the writing bodies 3. Any one of α, β, and γ can be selected.
In addition, the joint member 30 is attached to the rear end of the cylindrical body 4S of the mechanical pencil refill 3S, so that the mechanical pencil refill 3S is attached to the slider 20 having specifications designed for the ballpoint pen refills 3B and 3R via the joint member 30. Since connection is now possible, the slider 20 to be connected can be selected for each of the ballpoint pen refills 3B and 3R and the mechanical pencil refill 3S even after the use of the double writing instrument 1 is started. In selecting the target slider 20, any one slider 20 can be selected, and the mounting positions of the ballpoint pen refills 3B and 3R and the mechanical pencil refill 3S can be arbitrarily changed.

In addition, this invention is not limited to the said embodiment, The deformation | transformation in the range which can achieve the objective of this invention, improvement, etc. are included.
For example, in the above-described embodiment, an oil-based ball pen refill is adopted as a standard diameter writing body, and a mechanical pencil refill is adopted as a different diameter writing body, but not limited thereto, a mechanical pencil refill is used as a standard diameter writing body. While adopting, you may employ | adopt an oil-based ball-point pen refill as a different-diameter cursive. The specific selection of the standard-diameter cursive and the different-diameter cursive can be appropriately determined in consideration of cost and usability.
The cursive handwriting is not limited to oil-based ballpoint pen refills and mechanical pencil refills, and may be water-based gel ink ballpoint pen refills, or felt pen refills such as line markers and sign pens, and a white color that can be used for document correction. A ballpoint refill that stores ink may be used. In short, the specific mechanism and structure of the cursive can be selected as appropriate in practice.

  Furthermore, in the said embodiment, although only one type of joint member was provided with respect to one type of different-diameter writing body, not only this but multiple types of different-diameter writing bodies provided with the cylinders from which thickness differs, respectively. Is provided in the shaft cylinder, it is preferable to provide a plurality of types of joint members having optimal connection portions for connecting to cylinders having different thicknesses. At this time, the connection part of the joint member is not limited to the part (stepped part 32) reduced in diameter to be inserted into the cylindrical body, but a concave part or an opening part in which the end part of the cylindrical body is fitted. May be provided.

  The present invention is formed such that a plurality of types of writing bodies are accommodated in the shaft cylinder, and the tip of one writing body protrudes from the tip opening of the shaft cylinder by a user's operation so that writing with the writing body can be performed. It can be used for a double-type writing instrument that can write a plurality of types of writing instruments with a single tool.

It is a side view which shows the writing instrument which concerns on one Embodiment of this invention. It is sectional drawing in the II-II line of FIG. It is sectional drawing in the III-III line of FIG. It is sectional drawing in the IV-IV line of FIG. It is sectional drawing in the VV line of FIG. It is the side view and sectional drawing which show the mechanical pencil writing state of the said embodiment. It is the side view and sectional drawing which show the ball-point pen refill which concerns on the said embodiment. It is the side view and sectional drawing which show the mechanical pencil refill which concerns on the said embodiment.

Explanation of symbols

1 double writing instrument 3 cursive
3B Black ballpoint pen refill 3R Red ballpoint pen refill
3S Mechanical Pencil Refill 4 Tube
4B cylinder 4R cylinder
4S cylinder 5 ballpoint pen tip
5A Writing ball 6 Knock-type lead feeding mechanism
6A Mechanical pencil lead 7 Tip mechanism
10 Shaft cylinder 11 Tip shaft
12 Rear shaft 13 Male thread
14 Female thread 15 Tip port
16 Guide slit 17 Partition member
17A Tube insertion hole 20 Slider
21 Insertion protrusion 22 Finger hook
23 Locked part 24 Locked part
25 Recoil spring 30 Joint member
31 Opening 32 Stepped part

Claims (3)

A plurality of types of cursives each including a cylinder;
While storing these cursives so that they can move along the axial direction, a shaft cylinder formed including a cylindrical part separable into two parts, and
In order to project the tip of one of the plurality of writing bodies from the tip of the shaft tube, a tip opening opened at the tip of the shaft tube,
A plurality of guide slits that are opened along the circumferential direction on the side surface in the vicinity of the rear end of the shaft cylinder, with the axial direction of the shaft cylinder being opened as a longitudinal direction,
A plurality of sliders are provided that are guided by each of these guide slits and are slidably provided in the axial direction of the shaft cylinder, each of which is connected to the rear end of the corresponding writing body in a separable manner,
When any one of the plurality of sliders is slid toward the tip end side of the shaft tube, the tip of the corresponding writing body pressed by the slider protrudes from the tip opening of the shaft tube. A compound writing instrument formed so that writing is possible,
The slider has an outer diameter corresponding to the inner diameter of the cylinder in order to fit the tip of the slider into the rear end opening of the cylinder.
As the cursive body, the portion that fits the slider is the cylinder itself, and the standard diameter cursive body whose inner diameter is a predetermined standard dimension;
A tubular joint member is attached to the rear end of the tubular body, and a different-diameter writing body that is fitted to the slider with the joint member is provided,
The joint member has a rear end opened, and the inner diameter of the opening corresponds to the outer diameter of the front end of the slider in order to fit the front end of the slider in the opening.
For each of the different-diameter writing body and the standard-diameter writing body to which the joint member is attached, any one slider among the plurality of sliders can be selected as a slider to be connected. A compound writing instrument characterized by being formed.   The compound writing instrument according to claim 1, wherein the different-diameter writing body has an outer diameter smaller than that of the standard-diameter writing body.   The said standard-diameter writing body is a ball-point pen refill provided with the writing mechanism of a ball-point pen, and the said different-diameter writing body is a mechanical pencil refill provided with the writing mechanism of a mechanical pencil. 2. A dual-type writing instrument.