JP2007045032A - Multiple lead writing utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multiple lead utensil, in the barrel of which a favorite writing body and its corresponding operating body can be housed interchangeably by a user, in addition, the quick and sure interchanging of the writing body and the operating body can be realized and, further, the writing body and the operating body can be avoided from falling off from within a barrel when the rear end of the barrel is open and, furthermore, the retraction and extension of the writing body and the operating body into and from the barrel are easy. <P>SOLUTION: A freely opening and closing opening parts 42 for opening window slits 41 rearwards are provided at the rear end of a barrel 2. The writing body 6 and the operating body 7 are so constituted as to be able to be removed from and to be inserted within the barrel 2 through the opening parts 42. When the opening parts 42 are turned downwards under the state that the opening parts are open, the writing bodies 6 and the operating bodies 7 descend and then the writing bodies 6 and the operating bodies 7 are secured by securing wall parts 43. The operating body 7 at the rear end of the writing body 6 with its extended pen point abuts against the securing wall part 43. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a multi-core writing instrument. In detail, it is related with the multi-core writing instrument which accommodated the several writing body in the axial cylinder.

Conventionally, in this type of writing instrument, in Patent Document 1, a sliding body provided with a raised portion is connected to the rear portion of each writing body, the raised portion protrudes outward of the shaft cylinder, and the raised portion is detachable from the sliding body. A configuration has been disclosed in which the shape and color pattern of the raised portion can be selected without selecting the wrong cursive when replacing with a cursive that suits the user's preference. Yes.
JP 2003-11583 A

  In the conventional multi-core writing instrument, when the user replaces the writing body with a different type from the writing body housed in the shaft cylinder before the replacement, the sliding body remains in the shaft cylinder. Then, the cursive body and the raised portion are removed, and then the new cursive body and the new raised portion are attached to the sliding body. Therefore, the replacement work of the cursive body is complicated, and there is a possibility that the user cannot exchange quickly and surely.In addition, when replacing plural cursive bodies at the same time, the cursive body and the cursive body are mistakenly There is a risk of attaching a non-corresponding raised portion to one sliding body. Moreover, since the said protruding part is a small component, it is easy to lose.

  The present invention solves the above-described conventional problems, and allows a user to exchange a favorite writing body and an operating body corresponding to the user's favorite writing body in a shaft cylinder, and can quickly and quickly store the writing body and the operating body. It can be reliably replaced, and when the rear end of the shaft cylinder is opened, the writing body and the operating body can be prevented from falling out of the shaft cylinder, and in addition, the writing body and the operating body can be moved into the shaft cylinder. An object of the present invention is to provide a multi-core writing instrument that can be easily taken in and out. In the present invention, “front” refers to the pen tip side, and “rear” refers to the opposite side.

[1] In the present invention, a plurality of writing bodies 6 are accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, and each of the writing bodies 6 is urged rearward by a projectile body 8 to each of the writing bodies. The operating body 7 is connected to the rear end of the shaft 6, a plurality of window holes 41 extending in the front-rear direction are provided in the side wall of the shaft cylinder 2 in the radial direction, and each of the window holes 41 is radially outward from the window holes 41. By projecting the operating body 7 and sliding one operating body 7 forward along the window hole 41, the pen tip 61 of the writing body 6 connected to the one operating body 7 is inserted into the front end hole of the shaft cylinder 2. 31 is a multi-core writing instrument in which a pen point 61 of another writing body 6 that has been in the protruding state is immersed in the shaft tube 2, and a window hole 41 is formed at the rear end of the shaft tube 2. An openable and closable opening 42 is provided to open the back, and the writing body 6 and the operating body 7 are removed from the shaft cylinder 2 through the opening 42. When the opening 42 is opened and the opening 42 is directed downward, the writing body 6 and the operating body 7 are moved down in the shaft cylinder 2, It is a requirement that the writing body 6 or the operation body 7 is locked to the inner wall of the shaft cylinder 2 (Claim 1).

  The multi-core writing instrument 1 (Claim 1) is provided with an openable / closable opening 42 at the rear end of the shaft tube 2 for opening the window hole 41 rearward, and the writing body 6 and the operating body 7 are passed through the opening 42. The operation body 7 and the writing body 6 can be exchanged through the opening 42 by being configured to be removable from the inside of the shaft cylinder 2 and to be inserted into the shaft cylinder 2, and at the same time the user can replace the writing body 6 with a favorite one. The operating body 7 can also be exchanged with one appropriately corresponding to the writing body 6, and erroneous connection between the writing body 6 and the operating body 7 can be prevented. If the operation body 7 cannot be replaced, the type of the writing body 6 that can be replaced is limited to only the writing body 6 corresponding to the operation body 7 accommodated in the shaft cylinder 2, and the user's favorite writing body 6 is preferred. Cannot be exchanged freely. Moreover, since the said multi-core writing instrument 1 (Claim 1) can replace | exchange two parts of the writing body 6 and the operation body 7 via the same location (namely, opening part 42), the writing body 6 and the operation body 7 The replacement work is simplified, and the replacement work can be performed quickly and reliably.

  Further, when the multi-core writing instrument 1 (Claim 1) opens the opening 42 and faces the opening 42 downward, the writing body 6 and the operating body 7 drop and move in the shaft cylinder 2, and the writing body 6 Alternatively, since the operating body 7 is locked to the inner wall of the shaft cylinder 2, it is possible to avoid the writing body 6 and the operating body 7 from dropping from the opening 42.

[2] In the multi-core writing instrument 1 (Claim 1), when the writing body 6 and the operation body 7 are removed from the shaft cylinder 2 through the opening 42 and inserted into the shaft cylinder 2, the writing body 6 or the operation body The body 7 is preferably elastically deformable in a curved shape (Claim 2).

  The multi-core writing instrument 1 (Claim 2) makes it easy to remove the writing body 6 and the operating body 7 from the shaft cylinder 2 and to easily insert the writing body 6 and the operating body 7 into the shaft cylinder 2. It becomes. If the writing body 6 or the operation body 7 has a structure that cannot be elastically deformed in a curved shape, the writing body 6 and the operation body 7 are removed when the handwriting body 6 and the operation body 7 are removed from the shaft tube 2 or inserted into the shaft tube 2. Alternatively, it is difficult to remove the writing body 6 and the operating body 7 from the shaft cylinder 2 and to insert the writing body 6 and the operating body 7 into the shaft cylinder 2 because the operating body 7 and the inner wall of the shaft cylinder 2 are in contact with each other. It becomes. In the multi-core writing instrument 1 (Claim 2), the elastic body supporting portion 9 to which the front end of the elastic body 8 is locked is provided on the inner wall of the shaft cylinder 2, and the writing body 6 and the operating body 7 are passed through the opening 42. Are removed from the shaft cylinder 2 and inserted into the shaft cylinder 2, the rear part of each of the ink storage tubes 62 can be elastically deformed in a curved shape outward in the radial direction. Preferably there is.

[3] Further, according to the present invention, a plurality of writing bodies 6 are accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, and each of the writing bodies 6 is urged rearward by a projectile body 8, The operating body 7 is connected to the rear end of the writing body 6, a plurality of window holes 41 extending in the front-rear direction are provided in the side wall of the shaft cylinder 2 in the radial direction, and the above-mentioned window holes 41 are radially outward from the window body 41. By projecting each operation body 7 and sliding one operation body 7 forward along the window hole 41, the pen tip 61 of the writing body 6 connected to the one operation body 7 is moved to the shaft 2. While projecting from the front end hole 31, the pen tip 61 of the other writing body 6 that was in the projecting state first is immersed in the shaft cylinder 2, and the operating body 7 at the rear end of the writing body 6 in the projecting state of the pen tip is provided. A multi-core writing instrument in which a locking wall portion 43 to be locked is provided on the inner wall of the shaft tube 2, and a window hole 41 is opened rearward at the rear end of the shaft tube 2. An opening 42 that can be closed is provided, and the writing body 6 and the operation body 7 are configured to be removable from the shaft tube 2 and inserted into the shaft tube 2 through the opening 42, and the opening 42 is opened and When the opening 42 is directed downward, the writing body 6 and the operating body 7 are moved down in the shaft cylinder 2 and the writing body 6 or the operating body 7 is locked to the locking wall 43 (invention). Item 3) is a requirement.

  The multi-core writing instrument 1 (Claim 3) is provided with an openable / closable opening 42 at the rear end of the shaft tube 2 for opening the window hole 41 rearward, and the writing body 6 and the operating body 7 are passed through the opening 42. The operation body 7 and the writing body 6 can be exchanged through the opening 42 by being configured to be removable from the inside of the shaft cylinder 2 and to be inserted into the shaft cylinder 2, and at the same time the user can replace the writing body 6 with a favorite one. The operating body 7 can also be exchanged with one appropriately corresponding to the writing body 6, and erroneous connection between the writing body 6 and the operating body 7 can be prevented. If the operation body 7 cannot be replaced, the type of the writing body 6 that can be replaced is limited to only the writing body 6 corresponding to the operation body 7 accommodated in the shaft cylinder 2, and the user's favorite writing body 6 is preferred. Cannot be exchanged freely. Moreover, since the said multi-core writing instrument 1 (Claim 3) can replace | exchange two parts of the writing body 6 and the operation body 7 via the same location (namely, opening part 42), the writing body 6 and the operation body 7 The replacement work is simplified, and the replacement work can be performed quickly and reliably.

  Further, when the multi-core writing instrument 1 (Claim 3) opens the opening 42 and faces the opening 42 downward, the writing body 6 and the operating body 7 drop and move in the shaft cylinder 2, and the writing body 6 Alternatively, it is possible to avoid the writing body 6 and the operation body 7 from being dropped from the opening 42 by the operation body 7 being locked to the locking wall portion 43. In addition, the multi-core writing instrument 1 (Claim 3) has the locking wall portion 43 to which the operating body 7 at the rear end of the writing body 6 in the protruding state of the pen tip is locked, and the writing body 6 and the operation from the opening 42. Since it also serves as a means for preventing the body 7 from falling off, it is not necessary to provide another means for preventing the dropout other than the locking wall portion 43 on the inner wall of the shaft tube 2, and the structure of the inner wall of the shaft tube 2 is not complicated.

[4] In the multi-core writing instrument 1 (Claim 3), the operating body 7 is provided with a collar portion 75 to which the rear end of the elastic body 8 is locked, the opening 42 is opened, and the opening 42 is directed downward. In this case, it is preferable that the rear surface of the flange portion 75 is locked to the locking wall portion 43 (Claim 4).

  In the multi-core writing instrument 1 (Claim 4), the collar 75 that is locked to the rear end of the elastic body 8 is locked to the locking wall 43 to prevent the writing body 6 and the operating body 7 from falling off. Since it also serves as a means, it is not necessary to provide the operating body 7 with another means for preventing the dropout other than the flange 75, and the structure of the operating body 7 is not complicated.

[5] In the multi-core writing instrument 1 (Claim 4), an inclined surface 75a with respect to the axis is provided on the rear surface of the collar portion 75, and when the operating body 7 is pulled out backward, the inclined surface 75a and the locking wall portion 43 It is preferable that the operating body 7 is pushed up outward in the radial direction by the contact (Claim 5).

  When the writing body 6 and the operating body 7 are pulled out from the shaft cylinder 2 by the multi-core writing instrument 1 (Claim 5), the locking state between the collar portion 75 and the locking wall portion 43 of the operating body 7 is easy. It is cancelled | released and the smooth removal of the writing body 6 and the operation body 7 is attained. If the rear surface of the collar portion 75 is perpendicular to the axis, the rear surface of the collar portion 75 is caught by the locking wall 43 when the writing body 6 and the operating body 7 are pulled out from the shaft cylinder 2. The writing body 6 and the operation body 7 may not be removed smoothly.

[6] In the multi-core writing instrument 1 (Claim 3, 4 or 5), when the writing body 6 and the operation body 7 are removed from the shaft cylinder 2 through the opening 42 and inserted into the shaft cylinder 2, writing is performed. It is preferable that the body 6 or the operation body 7 can be elastically deformed in a curved shape (Claim 6).

  The multi-core writing instrument 1 (Claim 6) makes it easy to remove the writing body 6 and the operating body 7 from the shaft cylinder 2 and to easily insert the writing body 6 and the operating body 7 into the shaft cylinder 2. It becomes. If the writing body 6 or the operation body 7 has a structure that cannot be elastically deformed in a curved shape, the writing body 6 and the operation body 7 are removed when the handwriting body 6 and the operation body 7 are removed from the shaft tube 2 or inserted into the shaft tube 2. Alternatively, when the operating body 7 and the locking wall 43 come into contact with each other, the writing body 6 and the operating body 7 can be detached from the shaft cylinder 2 and the writing body 6 and the operating body 7 can be inserted into the shaft cylinder 2. It becomes difficult.

  In the multi-core writing instrument 1 (Claim 6), when the operating body 7 is pulled out rearward, the operating body 7 is pushed up radially outward by the contact between the inclined surface 75a and the locking wall portion 43. Therefore, it is preferable that the writing body 6 or the operation body 7 can be elastically deformed in a curved shape. Thereby, the writing body 6 and the operation body 7 can be further smoothly removed. In the multi-core writing instrument 1 (Claim 6), the elastic body supporting portion 9 to which the front end of the elastic body 8 is locked is provided on the inner wall of the shaft cylinder 2, and the writing body 6 and the operating body 7 are provided through the opening 42. Are removed from the shaft cylinder 2 and inserted into the shaft cylinder 2, the rear part of each of the ink storage tubes 62 can be elastically deformed in a curved shape outward in the radial direction. Preferably there is.

[7] Further, according to the present invention, a plurality of writing bodies 6 are accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, and each of the writing bodies 6 is urged rearward by a projectile body 8, The operating body 7 is connected to the rear end of the writing body 6, a plurality of window holes 41 extending in the front-rear direction are provided in the side wall of the shaft cylinder 2 in the radial direction, and the above-mentioned window holes 41 are radially outward from the respective window holes 41. By projecting each operation body 7 and sliding one operation body 7 forward along the window hole 41, the pen tip 61 of the writing body 6 connected to the one operation body 7 is moved to the shaft 2. A multi-core writing instrument that protrudes from the front end hole 31 and immerses the pen tip 61 of the other writing body 6 that has been in the protruding state in the axial tube 2. An openable / closable opening 42 for opening the hole 41 rearward is provided, and the writing body 6 and the operating body 7 are placed in the shaft tube 2 through the opening 42. When the writing body 6 and the operating body 7 are removed from the inside of the shaft cylinder 2 and inserted into the shaft cylinder 2 through the opening 42, the writing body 6 or the operation can be performed. It is a requirement that the body 7 can be elastically deformed into a curved shape (Claim 7).

  The multi-core writing instrument 1 (Claim 7) is provided with an openable / closable opening 42 at the rear end of the shaft cylinder 2 for opening the window hole 41 rearward, and the writing body 6 and the operating body 7 are passed through the opening 42. The operation body 7 and the writing body 6 can be exchanged through the opening 42 by being configured to be removable from the inside of the shaft cylinder 2 and to be inserted into the shaft cylinder 2, and at the same time the user can replace the writing body 6 with a favorite one. The operating body 7 can also be exchanged with one appropriately corresponding to the writing body 6, and erroneous connection between the writing body 6 and the operating body 7 can be prevented. If the operation body 7 cannot be replaced, the type of the writing body 6 that can be replaced is limited to only the writing body 6 corresponding to the operation body 7 accommodated in the shaft cylinder 2, and the user's favorite writing body 6 is preferred. Cannot be exchanged freely. Moreover, since the said multi-core writing instrument 1 (Claim 7) can replace two parts, the writing body 6 and the operation body 7, through the same location (namely, opening 42), the writing body 6 and the operation body 7 The replacement work is simplified, and the replacement work can be performed quickly and reliably.

  Further, the multi-core writing instrument 1 (Claim 7) has at least the writing body 6 or the operation when the writing body 6 and the operation body 7 are removed from the shaft cylinder 2 and inserted into the shaft cylinder 2 through the opening 42. Since the body 7 can be elastically deformed in a curved shape, the writing body 6 and the operating body 7 can be easily detached from the shaft cylinder 2, and the writing body 6 and the operating body 7 are inserted into the shaft cylinder 2. Becomes easy. If the writing body 6 or the operation body 7 has a structure that cannot be elastically deformed in a curved shape, the writing body 6 and the operation body 7 are removed when the handwriting body 6 and the operation body 7 are removed from the shaft tube 2 or inserted into the shaft tube 2. Alternatively, when the operating body 7 and the locking wall 43 come into contact with each other, the writing body 6 and the operating body 7 can be detached from the shaft cylinder 2 and the writing body 6 and the operating body 7 can be inserted into the shaft cylinder 2. It becomes difficult. In the multi-core writing instrument 1 (Claim 7), the elastic body supporting portion 9 to which the front end of the elastic body 8 is locked is provided on the inner wall of the shaft cylinder 2, and the writing body 6 and the operating body 7 are provided through the opening 42. Are removed from the shaft cylinder 2 and inserted into the shaft cylinder 2, the rear part of each of the ink storage tubes 62 can be elastically deformed in a curved shape outward in the radial direction. Preferably there is.

According to the multi-core writing instrument of claim 1, at the same time that the user can replace the cursive body with a favorite one, the operation body can also be replaced with an appropriate one corresponding to the cursive body, and the erroneous connection between the cursive body and the operation body. Can be prevented. In addition, according to the multi-core writing instrument of the first aspect, the replacement work of the writing body and the operation body is simplified, and the replacement work can be performed quickly and reliably. Furthermore, according to the multi-core writing instrument of claim 1, even if the opening is opened and the opening is directed downward, the writing body and the operating body are not likely to fall out of the opening.

According to the multi-core writing instrument of claim 2, the writing body and the operating body can be easily detached from the shaft cylinder, and the writing body and the operating body can be easily inserted into the shaft cylinder.

According to the multi-core writing instrument of claim 3, the user can replace the cursive body with his / her preference, and at the same time, the operation body can be replaced with an appropriate one corresponding to the cursive body. Can be prevented. Moreover, according to the multi-core writing instrument of claim 3, the replacement work of the writing body and the operation body is simplified, and the replacement work can be performed quickly and reliably. Furthermore, according to the multi-core writing instrument of claim 3, even if the opening is opened and the opening is directed downward, the writing body and the operating body are not likely to fall out of the opening. Moreover, according to the multi-core writing instrument of the third aspect, it is not necessary to provide another means for preventing the dropout other than the locking wall portion on the inner wall of the shaft cylinder, and the structure of the inner wall of the shaft cylinder can be simplified.

According to the multi-core writing instrument of the fourth aspect, it is not necessary to provide the operating body with another means for preventing the dropout other than the buttock, and the structure of the operating body can be simplified.

According to the multi-core writing instrument of claim 5, when the writing body and the operation body are pulled out from the shaft tube, the locked state between the collar portion and the locking wall portion of the operation body is easily released, and the writing body and the operation body are operated. Smooth removal of the body is possible.

According to the multi-core writing instrument of the sixth aspect, the writing body and the operating body can be easily detached from the shaft cylinder, and the writing body and the operating body can be easily inserted into the shaft cylinder.

According to the multi-core writing instrument of claim 7, the user can replace the cursive body with his / her preference, and at the same time, the operation body can be replaced with an appropriate one corresponding to the cursive body. Can be prevented. According to the multi-core writing instrument of claim 7, the replacement work of the writing body and the operation body is simplified, and the replacement work can be performed quickly and reliably. Furthermore, according to the multi-core writing instrument of claim 7, the writing body and the operating body can be easily detached from the shaft cylinder, and the writing body and the operating body can be easily inserted into the shaft cylinder.

1 to 6 show an embodiment of the present invention.
In the multi-core writing instrument 1 of the present embodiment, a plurality (specifically, two) of the writing bodies 6 are accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction. In addition, a plurality (specifically, two) elastic bodies 8 (specifically, compression coil springs) are accommodated in the shaft cylinder 2. Each of the cursive bodies 6 is urged rearward by each of the bullet bodies 8.

(Shaft tube)
The shaft cylinder 2 includes a front shaft 3 formed of a tapered cylindrical body, and a cylindrical rear shaft 4 attached to the rear end portion of the front shaft 3 by screwing or press-fitting. At the front end of the front shaft 3, a front end hole 31 through which the pen tip 61 of the writing body 6 can protrude is provided in the axial direction. The front shaft 3 and the rear shaft 4 are obtained by injection molding of a synthetic resin (for example, polycarbonate).

  A plurality (specifically, two) elongated window holes 41 extending in the front-rear direction are provided in a radial direction in the rear side wall of the rear shaft 4. The two window holes 41 are formed at positions symmetrical with respect to the axis. An opening 42 is formed at the rear end portion of the rear shaft 4 so as to penetrate in the axial direction and open radially outward. The opening 42 communicates with the window hole 41 at the rear end of the rear shaft 4 (that is, the rear end of the shaft cylinder 2), whereby the rear end of the window hole 41 is notched rearward and opened rearward. . On the other hand, the front end of the window hole 41 is always closed.

  In addition, a locking wall portion 43 made of a rib extending in the front-rear direction is integrally formed on the inner surface of the side wall between the window holes 41 of the rear shaft 4, and a pen tip protruding state is formed on the locking wall portion 43. The rear end of the operating body 7 connected to the rear end of the writing body 6 is locked.

  A clip 44 is provided on the outer surface of the side wall between the window holes 41 of the rear shaft 4.

(Cover)
At the rear end portion of the rear shaft 4, a lid portion 5 that can open and close the opening portion 42 is provided rotatably. One end of the lid 5 is pivotally connected to the base of the clip 44 by a hinge 52. The hinge portion 52 extends in the left-right direction of the clip 44 when the clip 44 is viewed from the front with the pen tip facing downward, whereby the lid portion 5 is rotatable in a substantially front-rear direction. A contact wall 51 is formed on the front surface of the lid 5. The abutting wall 51 is brought into contact with the rear end of the operating body 7 connected to the rear end of the writing body 6 in the pen tip immersion state. In the present embodiment, specifically, the hinge portion 52 is configured to be pivotably connected by a pivot shaft. However, in addition to this, the hinge portion 52 has flexibility capable of bending deformation. The structure connected integrally by a connection part or a thin part may be sufficient.

  An engagement portion 53 is provided on the front surface of the other end portion of the lid portion 5 (specifically, an engagement recess or an engagement hole portion is formed). An engaged portion 45 that can be engaged with the engaging portion 53 is provided at the rear end of the rear shaft 4 (specifically, an engaging convex portion protrudes). An inward projection is formed on the inner surface of the engagement portion 53 (engagement recess or engagement hole), while the outer surface of the engaged portion 45 (engagement projection) climbs over the inward projection. A lockable outward projection is formed.

  The engaging portion 53 and the engaged portion 45 are in an engaged state with each other when the lid portion 5 closes the opening 42 (specifically, the inward projection and the outward projection are overcoming and locked) ) When the operating body 7 and the contact wall portion 51 on the front surface of the lid portion 5 are brought into contact with each other by the rearward urging of the projectile body 8, the engaged state is not released and the lid portion 5 is not opened. .

  In addition to the configuration of the engaging portion 53 and the engaged portion 45, the engaging portion 53 is an engaging convex portion, and the engaged portion 45 is an engaging concave portion or an engaging hole portion. But you can.

(Cursive)
Each of the writing bodies 6 is a ball-point pen refill, and includes a ball-point pen tip (that is, a pen tip 61) in which a ball is rotatably held at the front end, and an ink container provided with the ball-point pen tip at the front end and opened at the rear end. A tube 62. Inside the ink storage tube 62 is accommodated an ink composed of a water-based gel ink having shear thinning viscosity, a low-viscosity aqueous ink, a low-viscosity oil-based ink, or a high-viscosity oil-based ink. When the ink is a water-based gel ink having shear thinning viscosity, a low-viscosity water-based ink, or a low-viscosity oil-based ink, a high-viscosity fluid that advances as the ink is consumed is disposed at the rear end of the ink in the ink containing tube 62. A follower consisting of is filled.

  Further, the ballpoint pen tip may be configured such that a ball held rotatably at the front end is urged forward by a projectile or the like, and the ball is brought into close contact with the inner surface of the front end edge portion. The ballpoint pen tip may be directly attached to the front end opening of the ink containing tube 62 by press fitting or the like, but in this embodiment, it is fixed to the front end opening of the ink containing tube 62 via the pen tip holder.

  The ink storage tube 62 is made of a synthetic resin (for example, polypropylene) molded body (for example, an extrusion molded body or an injection molded body), has radial flexibility, and can be elastically deformed into a curved shape.

(Operation body)
An operation body 7 is attached to the rear end of each of the writing bodies 6 (that is, the rear end opening of the ink containing tube 62). Each operation body 7 is obtained from a synthetic resin molded body. Each of the operation bodies 7 includes an operation portion 71 formed at the rear end portion and protruding outside from the window hole 41 of the shaft tube 2, a rear side protrusion portion 73 provided on the opposite side of the operation portion 71, A front projecting portion 72 provided in front of the rear projecting portion 73 on the opposite side of the operation portion 71; a fitting portion 74 formed at the front end portion and fitted into the rear end opening of the ink containing tube 62; and the fitting portion. 74, and a collar portion 75 formed at the rear of 74.

  The insertion portion 74 does not completely block the rear end opening of the ink storage tube 62 when inserted into the rear end opening of the ink storage tube 62, and can vent the inside and the outside of the ink storage tube 62. To.

  The rear end of the projectile 8 is locked to the front surface of the collar portion 75. An inclined surface 75 a with respect to the axis is formed on the rear surface of the flange portion 75. In addition, the inclined surface 75a of this invention should just be a surface which goes to radial direction outward gradually as it goes back. In the present embodiment, the inclined surface 75a is a flat surface having a certain angle, but may be a curved surface (a convex curved surface or a concave curved surface), for example.

  In the present embodiment, the ink containing tube 62 has flexibility and can be elastically deformed in a curved shape. In addition, the operation body 7 has flexibility and has a curved shape. It may be configured to be elastically deformable.

  When the pen point 61 of the writing body 6 is in an immersed state, the rear end portion of the operating body 7 attached to the writing body 6 is brought into contact with a contact wall portion 51 formed on the front surface of the lid portion 5. On the other hand, when the pen point 61 of the writing body 6 is in a protruding state, the rear end portion of the operating body 7 attached to the writing body 6 is locked to a locking wall portion 43 formed on the inner wall of the shaft cylinder 2. The

  The front projecting portion 72 of the operating body 7 connected to the rear end of the writing body 6 in the pen tip immersing state is in a pen tip protruding state when the operating portion 71 of the operating body 7 is slid forward. The pendant protruding state of the other writing body 6 is released by coming into contact with the rear protrusion 73 of the operating body 7 connected to the rear end of the other writing body 6.

  Each of the operation bodies 7 is colored in substantially the same color as the color of the ink stored in the connected writing body 6 (that is, in the ink storage tube 62). Specifically, each of the operation bodies 7 is formed of a synthetic resin molded body colored in substantially the same color as the ink color of the connected writing body 6. Thereby, the said operation body 7 has the identification display which consists of an ink color display. For example, the operating body 7 connected to the black writing body 6 with the ink color is colored black, the operating body 7 connected to the writing body 6 with the blue ink color is colored blue, and the writing body 6 with the red ink color. The operating body 7 connected to is colored red, and the operating body 7 connected to the writing body 6 whose ink color is green is colored green. In the present embodiment, two writing bodies 6 having different ink colors are accommodated in the shaft cylinder 2.

  Further, when each of the writing bodies 6 is a ballpoint pen having a different ball size at the nib 61, an identification display made up of a number representing the outer diameter of the ball at the nib 61 is provided on the operation unit 71 of the operation body 7. Is preferred. Further, when each writing body 6 is a writing instrument having a different shape of the pen tip 61, it is preferable to provide an identification display corresponding to the shape of the pen tip 61 on the operation unit 71 of the operation body 7. Further, an identification display consisting of a number representing the outer diameter of the ball of the pen point 61 and an identification display corresponding to the shape of the pen point 61 are provided on the operation portion 71 of the operation body 7 colored in the ink color. You can also. The identification display is provided on the operation body 7 by means such as printing, sticking a sticker, protruding, or recessed.

(Projection support part)
A cylindrical projectile support 9 is fixed to the inner wall of the shaft cylinder 2 (that is, the inner wall of the rear shaft 4). The projectile support 9 has a plurality of (specifically, two) inner holes 91 through which the writing body 6 is inserted, extending in the axial direction. A projectile 8 is disposed between the rear surface of the projectile support 9 and the front surface of the collar 75 of each operation body 7. The rear part of the writing body 6 (that is, the ink containing tube 62) is loosely inserted into each of the bullet bodies 8, and the front end of each bullet body 8 is locked by the rear surface of the bullet body support part 9, The rear end of each bullet member 8 is locked to the front surface of the collar portion 75 of the operation body 7.

  Further, around each inner hole 91 on the rear surface of the projectile support portion 9, a holding portion 92 made of a circumferential wall portion (specifically, a cylindrical protruding portion protruding rearward) is formed. The inner surface of each holding portion 92 is press-fitted and held at the outer surface of the front end portion of each bullet member 8. Thereby, when each writing body 6 and the operation body 7 are exchanged, it is possible to prevent each of the projectile bodies 8 from dropping out of the shaft tube 2 through the opening 42.

  Each of the projectile bodies 8 always urges each operation body 7 (that is, each writing body 6) backward. Each of the elastic bodies 8 is in a compressed state (that is, a state in which the writing body 6 is urged rearward) in both the pen tip protruding state and the pen tip immersing state. Shaking back and forth is prevented.

(Invitation of the nib)
A description will be given of the operation of the pen tip 61 in the present embodiment (see FIGS. 1 and 2).
When the operating portion 71 of one operating body 7 is slid forward along the window hole 41 against the rear urging of the projectile 8, the front projecting portion 72 of the operating body 7 that has been slid is moved forward. Then, the rear protrusion 73 of the operating body 7 of the other writing body 6 in the pen tip protruding state is lifted radially outward. As a result, the locking state between the locking wall portion 43 of the inner wall of the shaft cylinder 2 and the operating body 7 is released, and the other writing body 6 is moved rearward by the rear urging of the projectile body 8, so that the other writing body. The pen tip 61 of 6 is immersed in the shaft cylinder 2, and the rear end of the operation body 7 of the other writing body 6 is brought into contact with and abutted against the contact wall portion 51 on the front surface of the lid portion 5. Simultaneously with the immersion of the pen tip 61 of the other writing body 6, the pen tip 61 of the writing body 6 connected to the operating body 7 slid forward is projected outside from the front end hole 31 of the shaft tube 2. At the same time, the rear end of the operating body 7 that has been slid forward is locked to the locking wall 43 of the inner wall of the shaft tube 2, and the pen tip protruding state is maintained.

(Replace cursive and operating body)
The replacement of the writing body 6 and the operation body 7 in the present embodiment will be described.
When the writing body 6 is replaced, the lid 5 closes the opening 42 at the rear end of the shaft cylinder 2 (see FIG. 1), and as shown in FIG. The operation end of the cylinder 2 is pressed rearward, the engagement between the engaging portion 53 and the engaged portion 45 is released, the lid 5 is rotated rearward, and the opening 42 at the rear end of the shaft tube 2 is opened. To do. When the opening 42 is opened, each operation body 7 is slightly protruded from the opening 42 to the outside by the rear urging of the projectile 8. With the opening 42 at the rear end of the shaft cylinder 2 opened, the operating body 7 is taken out, so that the writing body 6 connected to the operating body 7 is connected to the inside of the shaft cylinder 2 through the opening 42. After that, the new writing body 6 and the new operation body 7 that are connected to each other are inserted into the shaft tube 2 through the opening 42. Then, the rear end of each operation body 7 is brought into contact with the abutting wall portion 51 of the lid section 5, the lid section 5 is rotated forward while pressing each operation body 7 forward, and then engaged. The opening 53 is closed by engaging the portion 53 and the locked portion. Thereby, the exchange work of the writing body 6 and the operation body 7 is completed.

(Prevents falling off of cursive and operating objects)
As shown in FIG. 4, when the writing body and the operation body are exchanged, the opening 42 at the rear end of the shaft cylinder 2 is opened and the opening 42 is directed downward. The body 7 falls and moves downward (that is, rearward) in the shaft cylinder 2 by its own weight, and the inclined surface 75a formed on the rear surface of the collar portion 75 of the operating body 7 and the locking wall portion 43 are locked in the front-rear direction. . Thereby, each writing body 6 and the operation body 7 can be prevented from falling off from the opening 42 at the rear end of the shaft cylinder 2. Further, at this time, the outer surface of the front end portion of each bullet 8 is press-fitted and held in the holding portion 92 on the rear surface of the bullet support 9 so that the opening 42 is opened and the opening 42 is directed downward. However, it is possible to prevent each of the bullets 8 from falling out of the opening 42.

(Elastic deformation of cursive)
As shown in FIGS. 5 and 6, when each writing body 6 is slightly pulled out from the state of FIG. 4, the rear portion (specifically, the elastic The rear portion of the body support portion 9 from the inner hole 91 is elastically deformed (bend deformation) radially outwardly, and the side surface of the locking wall portion 43 and the ink containing tube 62 or the operation body 7 are in the radial direction. It becomes the pressure contact state. In the present embodiment, when the writing body 6 and the operation body 7 are removed from the shaft cylinder 2, the side surface of the locking wall portion 43 and the ink storage tube 62 or the operation body 7 are pressed in the radial direction, and at the same time, the ink storage tube When the 62 is elastically deformed into a curved shape, the writing body 6 and the operating body 7 can be easily detached from the shaft cylinder 2. Similarly, in the present embodiment, when the writing body 6 and the operation body 7 are inserted into the shaft cylinder 2, the side surface of the locking wall portion 43 and the ink containing tube 62 or the operation body 7 are pressed in the radial direction at the same time. The ink storage tube 62 is elastically deformed in a curved shape, so that the writing body 6 and the operation body 7 can be easily inserted into the shaft cylinder 2.

(Prevents the operator from getting caught)
In the present embodiment, by providing an inclined surface 75a with respect to the axis on the rear surface of the collar portion 75, the inclined surface of the rear surface of the collar portion 75 when the writing body 6 and the operating body 7 are pulled out from the shaft cylinder 2 rearward. The operating body 7 is pushed up radially outward by abutting 75a and the locking wall 43. Thereby, the rear surface of the collar part 75 is not caught by the latching wall part 43, and the latching state between the collar part 75 and the latching wall part 43 of the operating body 7 is easily released. Can be removed smoothly.

(Prevents cursive and operating objects from popping out)
Further, in the present embodiment, with the opening 42 opened, the operating body 7 at the rear end of the writing body 6 in the pen tip immersing state is slid forward, and the pen tip protrudes before the sliding operation. Even if a certain other writing body 6 is vigorously immersed backward by the resilience of the projectile 8, the operating body 7 is locked to the locking wall 43 in the front-rear direction as shown in FIG. Alternatively, as shown in FIG. 5, the operating body 7 or the writing body 6 (the ink containing tube 62) and the locking wall portion 43 are pressed in the radial direction. Thereby, there is no possibility that the writing body 6 and the operation body 7 jump out of the opening 42 at the rear end of the shaft tube 2 and fall off from the shaft tube 2.

It is a longitudinal cross-sectional view which shows the all pen nib immersion state (at the time of non-writing) in embodiment of the multi-core writing instrument of this invention. It is a longitudinal cross-sectional view which shows the state (at the time of writing) which one nib of the multi-core writing instrument of FIG. 1 protruded. It is a side view which shows the state which opened the opening part of the rear end of the multi-core writing instrument of FIG. 1 in a pen tip downward state. It is a principal part longitudinal cross-sectional view which shows the state which opened the opening part of the axial cylinder rear end, and made this opening part face down. FIG. 5 is a longitudinal sectional view of a main part showing a state where an operating body is pulled out from the state of FIG. 4. It is an AA line expanded sectional view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Multi-core writing instrument 2 Shaft cylinder 3 Front shaft 31 Front end hole 4 Rear shaft 41 Window hole 42 Opening part 43 Locking wall part 44 Clip 45 Engagement part 5 Lid part 51 Contact wall part 52 Hinge part 53 Engagement part 6 Cursive body 61 nib (ballpoint pen tip)
62 Ink receiving tube 7 Operating body 71 Operating section 72 Front projecting section 73 Rear projecting section 74 Insertion section 75 Hook section 75a Inclined surface 8 Projection body 9 Projection body support section 91 Inner hole 92 Holding section

Claims (7)

A plurality of writing bodies are accommodated in the shaft cylinder so as to be movable in the front-rear direction, each of the writing bodies is urged rearward by a projectile, and an operating body is connected to a rear end of each of the writing bodies, A plurality of window holes extending in the front-rear direction are provided in the side wall of the cylinder in the radial direction, the respective operation bodies are protruded radially outward from the respective window holes, and one operation body is disposed along the window hole. By sliding forward, the pen tip of the cursive body connected to the one operating body is projected from the front end hole of the shaft cylinder, and the pen tip of the other cursive body that has been in the projecting state first is inserted into the shaft cylinder. Is a multi-core writing instrument that is immersed in, and is provided with an openable / closable opening at the rear end of the shaft cylinder, and the writing body and the operating body are removed from the shaft cylinder through the opening. It is possible and can be inserted into the shaft cylinder, the opening is opened and the opening is directed downward , Multicore writing instrument cursive and operating body falls move within barrel, said writing member or an operation member is characterized by being locked to the barrel inner wall. The multi-core writing instrument according to claim 1, wherein the writing body or the operating body can be elastically deformed in a curved shape when the writing body and the operating body are removed from the shaft tube and inserted into the shaft tube through the opening. A plurality of writing bodies are accommodated in the shaft cylinder so as to be movable in the front-rear direction, each of the writing bodies is urged rearward by a projectile, and an operating body is connected to a rear end of each of the writing bodies, A plurality of window holes extending in the front-rear direction are provided in the side wall of the cylinder in the radial direction, the respective operation bodies are protruded radially outward from the respective window holes, and one operation body is disposed along the window hole. By sliding forward, the pen tip of the cursive body connected to the one operating body is projected from the front end hole of the shaft cylinder, and the pen tip of the other cursive body that has been in the projecting state first is inserted into the shaft cylinder. Is a multi-core writing instrument provided with a locking wall portion on the inner wall of the shaft cylinder for locking the operation body at the rear end of the writing body in a state where the pen tip protrudes. An openable and closable opening that opens rearwardly, and the writing body and the operating body can be removed from the shaft cylinder through the opening and When the opening is opened and the opening is turned downward, the writing body and the operating body drop and move in the shaft cylinder, and the writing body or the operating body is a locking wall portion. A multi-core writing instrument characterized by being locked to. When the operating body is provided with a hook portion to which the rear end of the elastic body is locked, and the opening portion is opened and the opening portion is directed downward, the rear surface of the hook portion is locked to the locking wall portion. The multi-core writing instrument according to claim 3 which is made. The inclined surface with respect to an axis line is provided on the rear surface of the collar portion, and when the operating body is pulled out rearward, the operating body is pushed up radially outward by the contact between the inclined surface and the locking wall portion. Multi-core writing instrument. 6. The multiplicity according to claim 3, 4, or 5, wherein the writing body or the operating body can be elastically deformed in a curved shape when the writing body and the operating body are removed from the inside of the shaft tube and inserted into the shaft tube through the opening. Core writing instrument. A plurality of writing bodies are accommodated in the shaft cylinder so as to be movable in the front-rear direction, each of the writing bodies is urged rearward by a projectile, and an operating body is connected to a rear end of each of the writing bodies, A plurality of window holes extending in the front-rear direction are provided in the side wall of the cylinder in the radial direction, the respective operation bodies are protruded radially outward from the respective window holes, and one operation body is disposed along the window hole. By sliding forward, the pen tip of the cursive body connected to the one operating body is projected from the front end hole of the shaft cylinder, and the pen tip of the other cursive body that has been in the projecting state first is inserted into the shaft cylinder. Is a multi-core writing instrument that is immersed in, and is provided with an openable / closable opening at the rear end of the shaft cylinder, and the writing body and the operating body are removed from the shaft cylinder through the opening. And can be inserted into the shaft tube, and the writing body and the operation body can be inserted from the shaft tube through the opening. Insert the Rihazusu time and axis cylinder, multicore writing instrument cursive or operation body is characterized in that the elastically deformable in a curved shape.

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