JP3143310U - Multi-core writing instrument - Google Patents

Abstract

The present invention provides a multi-core writing instrument in which a user's favorite writing body and an operation body corresponding to the writing body can be exchangeably accommodated in a shaft tube, and the writing body and the operation body can be replaced quickly and reliably.
A plurality of writing bodies are accommodated in a shaft cylinder so as to be movable in the front-rear direction. Each cursive is urged backward by a projectile. An operation body corresponding to each cursive body is connected to the rear end of each cursive body. A plurality of window holes 41 extending in the front-rear direction are provided in the side wall of the shaft tube 2 in the radial direction. Each operation body is protruded radially outward from each window hole 41. At least one portion of the peripheral wall of the window hole 41 is configured to be separable in the radial direction. The operation body and the writing body are configured to be removable from the shaft tube 2 and insertable into the shaft tube 2 through the separation portion of the peripheral wall of the window hole 41.
[Selection] Figure 7

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

  The conventional multi-core writing instrument is a sliding body in which the user leaves the sliding body in the shaft cylinder when the user replaces the writing body with a different type from the writing body housed in the shaft cylinder before replacement. 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 perform a quick and reliable replacement. Furthermore, when replacing plural cursive bodies at the same time, the cursive body and the cursive body are mistakenly replaced. 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-mentioned conventional problems, and allows a user to exchange a favorite writing body and an operation body corresponding to the user's favorite writing body in a shaft cylinder, and can quickly and quickly store the writing body and the operation body. An object of the present invention is to provide a multi-core writing instrument that can be reliably replaced. 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. The operating body 7 corresponding to each writing body 6 is connected to the rear end, and a plurality of window holes 41 extending in the front-rear direction are provided in the side wall of the shaft tube 2 in the radial direction. Each of the operation bodies 7 is projected outward in the radial direction, and one operation body 7 is slid forward along the window hole 41, whereby the pen tip of the writing body 6 connected to the one operation body 7. A multi-core writing instrument for projecting 61 from the front end hole 31 of the shaft cylinder 2 and immersing the pen tip 61 of another writing body 6 in the projecting state in the shaft cylinder 2. Can be removed from the shaft cylinder 2 and exchanged, and at least one of the peripheral walls of the window hole 41 can be separated in the radial direction. The operating body 7 can be removed from the shaft cylinder 2 through the separation portion of the peripheral wall of the window hole 41 when at least one portion of the peripheral wall of the window hole 41 is separated in the radial direction. It is a requirement that it can be inserted into the inside (claim 1).

  In the multi-core writing instrument 1 (Claim 1), the user can remove the writing body 6 in the shaft cylinder 2 and replace it with a favorite writing body 6, and at the same time, the operating body 7 is also removed from the shaft cylinder 2 and written. It can be exchanged for one that properly corresponds to the body 6, and erroneous connection between the writing body 6 and the operating body 7 can be prevented. If the operation body 7 is configured so that it cannot be removed from the shaft cylinder 2 and 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. However, I cannot exchange my favorite cursive 6 freely. Further, the multi-core writing instrument 1 (Claim 1) does not require replacement of small parts as in the prior art, and can perform quick and reliable replacement work.

  The multi-core writing instrument 1 (Claim 1) has a configuration in which at least one portion of the peripheral wall of the window hole 41 is separated in the radial direction, and an opening communicating with the window hole 41 is formed in the peripheral wall of the window hole 41. Alternatively, any configuration in which an opening that does not communicate with the window hole 41 is formed in the peripheral wall of the window hole 41 may be employed. In the multi-core writing instrument 1 (Claim 1), each of the writing bodies 6 may be replaced by separating the peripheral wall of the window hole 41 of the shaft tube 2, or in front of the shaft tube 2. An opening is provided (for example, the shaft cylinder 2 is configured by a detachable front shaft 3 and a rear shaft 4, and an opening is provided at the front end of the rear shaft 4 by removing the front shaft 3). You may exchange through. In the present invention, the peripheral wall of the window hole 41 refers to the side wall of the shaft tube 2 positioned around the window hole 41.

  [2] 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. The operating body 7 corresponding to each writing body 6 is connected to the rear end of the body 6, and 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. Each of the operating bodies 7 protrudes radially outward from 41, and one operating body 7 is slid forward along the window hole 41, whereby the writing body 6 connected to the one operating body 7 is A multi-core writing instrument for causing the nib 61 to protrude from the front end hole 31 of the shaft cylinder 2 and immersing the pen nib 61 of another writing body 6 in the protruding state into the shaft cylinder 2. At least one part of the peripheral wall of the window hole 41 is configured to be separable in the radial direction, and at least one part of the peripheral wall of the window hole 41 in the radial direction. The operation body 7 and the writing body 6 are configured to be removable from the shaft cylinder 2 and insertable into the shaft cylinder 2 when separated from each other through the separation portion of the peripheral wall of the window hole 41 (Claim 2). Requirement.

  The multi-core writing instrument 1 (Claim 2) separates at least one portion of the peripheral wall of the window hole 41 in the radial direction, and the operation body 7 and the writing body 6 are pivoted via the separation portion of the peripheral wall of the window hole 41. By being able to be removed from the cylinder 2 and exchanged, the user can remove the cursive body 6 in the shaft cylinder 2 and replace it with a favorite cursive body 6, and at the same time, the operating body 7 can also be removed from the shaft cylinder 2 and the cursive body. 6 can be exchanged appropriately, and the erroneous connection between the writing body 6 and the operating body 7 can be prevented. If the operation body 7 is configured so that it cannot be removed from the shaft cylinder 2 and 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. However, I cannot exchange my favorite cursive 6 freely. In the multi-core writing instrument 1 (Claim 2), the two parts of the writing body 6 and the operation body 7 can be exchanged through the same place (that is, the separation place of the peripheral wall of the window hole 41). And the replacement work of the operating body 7 is simplified, and the replacement work can be performed quickly and reliably.

  The multi-core writing instrument 1 (Claim 2) has a configuration in which at least one portion of the peripheral wall of the window hole 41 is separated in the radial direction, and an opening communicating with the window hole 41 is formed in the peripheral wall of the window hole 41. Alternatively, any configuration in which an opening that does not communicate with the window hole 41 is formed in the peripheral wall of the window hole 41 may be employed.

  [3] In the multi-core writing instrument 1 (Claim 2), the writing body 6 and the operating body 7 are connected to each other so that they can be removed from the shaft cylinder 2 and inserted into the shaft cylinder 2. 3) is preferred.

  The multi-core writing instrument 1 (Claim 3) is configured such that the writing body 6 and the operation body 7 are connected and can be removed from the shaft cylinder 2 and inserted into the shaft cylinder 2, so that the writing body 6 and the operation body 7 are operated. The replacement work of the body 7 is further simplified, and any user can perform the replacement work quickly and reliably. Moreover, if the said multi-core writing instrument 1 (Claim 3) provides a user with the writing body 6 and the operation body 7 in a connection state, it will become unnecessary for a user to connect the writing body 6 and the operation body 7. When the cursive body 6 is replaced, it is possible to reliably prevent the cursive body 6 and the operation body 7 corresponding to the cursive body 6 from being erroneously connected.

  [4] In the multi-core writing instrument 1 (Claims 1 to 3), at least the front end or the rear end of the peripheral wall of the window hole 41 is configured to be separable in the radial direction, and the front end or the rear end of the peripheral wall of the window hole 41 is formed. It is preferable that the window holes 41 are separated in the radial direction and opened forward or backward (Claim 4).

  In the multi-core writing instrument 1 (Claim 4), when the operating body 7 is replaced, the operating body 7 protruding from the window hole 41 is removed from the shaft cylinder 2 through the window hole 41 opened forward or rearward. Therefore, the operation of exchanging the operating body 7 is further facilitated.

  [5] In the multi-core writing instrument 1 (claims 1 to 4), as the rear end of the peripheral wall of the window hole 41 is separated in the radial direction, the side wall of the rear end portion of the shaft tube 2 is separated in the radial direction. A lid portion 5 is detachably provided on the side wall of the rear end portion of the shaft cylinder 2, and the rear end portion of the shaft cylinder 2 is provided by the lid portion 5 attached to the side wall of the rear end portion of the shaft cylinder 2. It is preferable that the side walls of the two are held in a united state (Claim 5).

  In the multi-core writing instrument 1 (Claim 5), when the writing is used, the lid 5 is attached to the side wall of the rear end portion of the shaft tube 2, so that the side wall of the rear end portion of the shaft tube 2 is stably in the combined state. It is hold | maintained and it can prevent that the side wall of the rear-end part of the axial cylinder 2 isolate | separates to radial direction. If the side wall of the rear end portion of the shaft cylinder 2 is separated in the radial direction during writing, there is a possibility that the operation body 7 in the rear biased state will jump out.

  [6] In the multi-core writing instrument 1 (Claims 1 to 5), an elastic body support portion 9 in which a front end of the elastic body 8 abuts in the axial direction is provided on the inner wall of the shaft tube 2, and the elastic body support is provided. It is preferable that a holding portion 92 that holds the front end portion of the bullet member 8 in the radial direction is formed in the portion 9 (Claim 6).

  When the operating body 7 is removed from the shaft cylinder 2 by the multi-core writing instrument 1 (Claim 6), the front end portion of the elastic body 8 is held in the radial direction by the holding portion 92. It is possible to prevent the shaft cylinder 2 from dropping out. If the projectile 8 falls out of the shaft 2, it takes time to insert the projectile 8 again when inserting a new operation body 7, and the projectile 8 is lost. There is a fear. The configuration in which the holding portion 92 holds the front end portion of the projectile 8 is, for example, a configuration in which the outer surface of the front end of the projectile 8 is held radially inward, or the inner surface of the front end of the projectile 8 has a diameter. The structure hold | maintained outside a direction is mentioned.

  [7] In the multi-core writing instrument 1 (Claims 1 to 6), each of the operation bodies 7 is colored in the color of ink accommodated in the connected writing body 6 (Claim 7). preferable.

  The multi-core writing instrument 1 (Claim 7) is colored in the same color or substantially the same color as the color of the ink contained in each operation body 7, and the ink color of the writing body 6 that operates to project the pen tip, The operation part 71 exposed from the window hole 41 of the shaft tube 2 can be easily identified. Furthermore, the multi-core writing instrument 1 (Claim 7) has an operating body connected to the writing body 6 to be removed by visually recognizing the ink color of the operating body 7 protruding from the window hole 41 when the operating body 7 is replaced. 7 can be easily identified from the window hole 41. In addition, when the writing body 6 in a state where the colored operation body 7 is connected is in a state before being accommodated in the shaft cylinder 2 (that is, a state outside the shaft cylinder 2), the ink color of the writing body 6 Can be easily identified even from a relatively long distance by visually recognizing the operating body 7.

  In the present invention, the operation body 7 corresponding to the cursive body 6 is preferably the operation body 7 having an identification display corresponding to the cursive body 6. Examples of the identification display include ink color display, pen tip size display, handwriting width display, and pen tip type display. In the present invention, the cursive 6 includes, for example, a ballpoint pen, a marking pen, and a mechanical pencil. In the present invention, the shaft cylinder 2 may include a front shaft 3 provided with a front end hole 31 from which a pen tip 61 of the writing body 6 can project and a rear shaft 4 provided with a window hole 41 on a side wall. . Further, the rear shaft 4 is configured to be movable in the front-rear direction with respect to the front shaft 3, a mechanical pencil is adopted as the writing body 6, and the lead core can be extended by the advancement of the rear shaft 4. Further, in the present invention, the number of the writing bodies 6 accommodated in the shaft cylinder 2 may be two or more, specifically, 2, 3, 4, 5, 6 or the like. It is done.

  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, it is possible to perform a quick and reliable replacement operation without requiring replacement of small parts as in the prior art.

  According to the multi-core writing instrument of claim 2, the operation body and the writing body can be exchanged via the separation portion of the peripheral wall of the window hole, and at the same time, the operation body can be replaced with the writing body of the user's preference. It can be exchanged for one that is appropriate for the body, and erroneous connection between the writing body and the operating body can be prevented. Moreover, the replacement work of the writing body and the operation body is simplified, and the replacement work can be performed quickly and reliably.

  According to the multi-core writing instrument of claim 3, the replacement work of the writing body and the operation body is further simplified, and any user can perform the replacement work quickly and reliably. In addition, if the cursive body and the operation body are provided to the user in a connected state, it becomes unnecessary for the user to connect the cursive body and the operation body, and when replacing the cursive body, the cursive body and the cursive body are supported. It is possible to reliably prevent erroneous connection with the operated body.

  According to the multi-core writing instrument of claim 4, when replacing the operating body, the operating body protruding from the window hole can be removed from the inside of the shaft cylinder through the window hole opened forward or rearward. It is easy to replace the operating body.

  According to the multi-core writing instrument of claim 5, when the writing is used, the side wall of the rear end portion of the shaft tube can be prevented from being separated in the radial direction by attaching the lid portion to the side wall of the rear end portion of the shaft tube.

  According to the multi-core writing instrument of the sixth aspect, when the operating body is removed from the shaft cylinder, it is possible to prevent the elastic body from dropping out of the shaft cylinder.

  According to the multi-core writing instrument of the seventh aspect, the ink color of the writing body for pen tip protruding operation can be easily identified by the operation portion exposed from the window hole of the shaft tube. Further, when the operating body is replaced, by visually checking the ink color of the operating body protruding from the window hole, the operating body connected to the writing body to be removed can be easily identified from the window hole, and the replacement work is facilitated.

[First Embodiment]
1 to 7 show a first embodiment of the present invention.
In the multi-core writing instrument 1 of the present embodiment, a plurality (specifically, two) of writing bodies 6 are accommodated in a shaft tube 2 so as to be movable in the front-rear direction. Each of the writing bodies 6 is urged rearward by an elastic body 8 (specifically, a compression coil spring).

(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 symmetrically with respect to the axis. The rear end of the inner wall of the window hole 41 serves as a contact wall portion 41a on which the operating body 7 connected to the rear end portion of the immersed writing body 6 can contact.

  A side wall of the rear shaft 4 having the window hole 41 includes a separation wall portion 43 that can be separated in the radial direction. That is, the rear shaft 4 includes a rear shaft main body 42 and a separation wall portion 43 that can be separated and combined with the rear shaft main body 42. The separation wall 43 is made of a semi-cylindrical member. The rear shaft main body 42 and the separation wall portion 43 are configured such that the front end and the rear end of the peripheral wall of each window hole 41 can be separated in the radial direction. When the separation wall 43 is completely separated in the radial direction (that is, when the front end of the peripheral wall of the window hole 41 is separated in the radial direction and the rear end of the window hole 41 is separated in the radial direction), each window hole Since half of the peripheral wall of 41 is removed, each window hole 41 is greatly opened. The operating body 7 can be easily removed from the window hole 41 having a large opening and replaced.

  The outer peripheral surface of the front end portion of the separation wall portion 43 is reduced in diameter, and an engaging portion 43 a that can engage with the inner surface of the rear shaft main body 42 is provided there.

  Further, an opening that opens rearward is formed at the rear end of the rear shaft 4. A lid 5 is detachably attached to the outer peripheral surface of the opening (for example, by screwing, press-fitting, or overcoming engagement). The outer peripheral surface of the rear end portion of the separation wall portion 43 and the outer peripheral surface of the rear end portion of the rear shaft main body 42 are reduced in diameter, and an engaging portion 46 is formed therein, and the lid portion 5 is formed in the engaging portion 46. Removably attached.

  Further, a locking wall portion 44 made of a rib extending in the front-rear direction is formed on the inner surface of the side wall between the window holes 41 of the rear shaft 4, and the pen tip 61 protrudes from the locking wall portion 44. The rear end of the operating body 7 of the cursive body 6 is locked. 3 to 8, the locking wall portion 44 is omitted.

  A clip 45 is provided on the outer surface of the side wall between the window holes 41 of the rear shaft 4 (rear shaft main body 42). In addition, the clip 45 can be provided on the separation wall 43.

(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 moves forward 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.

(Operation body)
An operating 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 of the operating bodies 7 includes an operating portion 71 formed at the rear end and projecting outside from the window hole 41 of the shaft cylinder 2, a front projecting portion 72 provided on the opposite side of the operating portion 71, and the operation A rear projecting portion 73 provided behind the front projecting portion 72 on the opposite side of the 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 on the rear side. 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. Further, the rear end of the projectile 8 is locked to the front surface of the collar portion 75. In addition, retaining projections are formed on both side walls of the operating body 7. The retaining protrusions can be engaged with the inner surfaces of both side walls of the window hole 41.

  When the pen point 61 of the writing body 6 is in an immersive state, the rear end portion of the operating body 7 attached to the writing body 6 makes an impact on the abutting wall portion 41 a formed at the rear end of the inner wall of the window hole 41. Is done. 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 44 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 the other projecting state when the operating portion 71 of the operating body 7 is slid forward. The pendant projecting state of the other cursive body 6 is released by contacting the rear projecting portion 73 of the operating body 7 connected to the rear end of the cursive body 6.

(Identification display)
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 operation body 7 connected to the black writing body 6 with the ink color is colored black, the operation 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.

  In particular, when the ink containing tube 62 is made of an opaque material or when the ink containing tube 62 is made of a transparent material and the ink inside is dye ink, it is difficult to visually recognize the ink color inside. However, in this case, it is effective that the operation body 7 is colored in substantially the same color as the color of the ink, so that the ink color inside the handwritten body 6 before the exchange existing outside the shaft cylinder 2 can be easily changed from the outside. Can be identified.

  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)
On the inner wall of the shaft cylinder 2 (that is, the inner wall of the rear shaft main body 42), a disk-shaped projectile support part 9 is provided. 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. While the cursive body 6 is loosely inserted into each of the bullet bodies 8, the front end of each bullet body 8 is locked by the rear surface of the bullet body support portion 9, and the rear end of each bullet body 8. Is locked to the front surface of the collar portion 75 of the operating body 7.

  In addition, a holding portion 92 that communicates with the inner hole 91 and has an inner diameter slightly larger than the inner hole 91 is formed behind each inner hole 91 on the rear surface of the projectile support portion 9. 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 the rear shaft main body 42 and the separation wall portion 43 are separated and each writing body 6 and the operation body 7 are exchanged, it is possible to prevent each of the projectile bodies 8 from falling out of the shaft cylinder 2. A step portion is formed between the inner hole 91 and the holding portion 92 so that the front end of the projectile 8 can be brought into contact with and locked.

  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.
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. The rear projecting portion 73 of the operation portion 71 of the other cursive body 6 in the projecting state is lifted radially outward. Thereby, the locked state of the locking wall portion 44 of the inner wall of the shaft tube 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, and the other writing body. The pen tip 61 of 6 is inserted into the shaft cylinder 2, and the rear end of the operation portion 71 of the other writing body 6 is brought into contact with and abutted against the contact wall portion 41 a at the rear end of the inner wall of the window hole 41. 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 portion 44 of the inner wall of the shaft cylinder 2, and the protruding state of the pen tip 61 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 exchanged, the rear shaft main body 42 and the separation wall portion 43 are combined (see FIG. 3), and after removing the lid 5 from the rear end of the rear shaft 4, the separation wall portion 43 is removed from the rear shaft main body. Each window hole 41 is opened largely by separating from 42 in the radial direction (see FIG. 7). Then, by removing the operating body 7 from the window hole 41, the writing body 6 connected to the operating body 7 is taken out from the shaft cylinder 2 through the separated window hole 41, and thereafter A new writing body 6 and a new operating body 7 in a connected state are inserted into the shaft cylinder 2 through the separated window hole 41. And the said separation wall part 43 and the rear-shaft main body 42 are united state, Then, the cover part 5 is attached to the rear-end part of the axial cylinder 2, and replacement | exchange of the writing body 6 and the operation body 7 is complete | finished.

[Second Embodiment]
FIG. 8 shows a second embodiment of the present invention.
In the present embodiment, the rear end of the peripheral wall of the separation wall portion 43 is configured to be separable in the radial direction, while the front end of the peripheral wall of the separation wall portion 43 is connected by the rear shaft main body 42 and the hinge portion 47. In addition, the other structure of this Embodiment is the same as that of 1st Embodiment, and abbreviate | omits description.

It is a longitudinal cross-sectional view which shows the all-pen-tips immersion state (at the time of non-writing) of 1st 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 AA sectional view taken on the line of the multicore writing instrument of FIG. (However, the cursive, operating body, projectile, and locking wall portion are omitted.) FIG. 4 is a sectional view taken along line BB in FIG. 3. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. It is a longitudinal cross-sectional view which shows the state which isolate | separated the surrounding wall of the window hole of the multi-core writing instrument of FIG. It is a longitudinal cross-sectional view which shows the state which isolate | separated the surrounding wall of the window hole in 2nd Embodiment of the multi-core writing instrument of this invention. (However, the cursive, operating body, projectile, and locking wall portion are omitted.)

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 41a Contact wall part 42 Rear shaft main body 43 Separation wall part 43a Engagement part 44 Locking wall part 45 Clip 46 Engagement part 47 Hinge part 5 Lid 6 Cursive 61 Pen point (ballpoint pen tip)
62 Ink Containment Tube 7 Operating Body 71 Operating Part 72 Front Projecting Part 73 Rear Projecting Part 74 Insertion Part 75 Gutter Part 8 Projection Body 9 Projection Body Support Part 91 Inner Hole 92 Holding Part

Claims (7)

A plurality of writing bodies are accommodated in the shaft cylinder so as to be movable in the front-rear direction, and each of the writing bodies is urged rearward by a projectile, corresponding to each writing body at the rear end of each of the writing bodies. The operating bodies are connected, and a plurality of window holes extending in the front-rear direction are provided in the radial direction on the side wall of the shaft cylinder, and the respective operating bodies are protruded radially outward from the respective window holes. By sliding the operating body forward along the window hole, the pen tip of the writing body connected to that one operating body is projected from the front end hole of the shaft tube, and the other writing that was in the protruding state first. It is a multi-core writing instrument that immerses the pen tip of the body into the shaft cylinder, and each writing body is removable from the inside of the shaft cylinder so that it can be replaced, and at least one part of the peripheral wall of the window hole can be separated in the radial direction The window hole when configured and radially separated at least one of the peripheral walls of the window hole Multifilamentary writing instrument, characterized in that the operating body through the separation portion of the peripheral wall, and insertable configured to removably and barrel within the barrel inside. A plurality of writing bodies are accommodated in the shaft cylinder so as to be movable in the front-rear direction, and each of the writing bodies is urged rearward by a projectile, corresponding to each writing body at the rear end of each of the writing bodies. The operating bodies are connected, and a plurality of window holes extending in the front-rear direction are provided in the radial direction on the side wall of the shaft cylinder, and the respective operating bodies are protruded radially outward from the respective window holes. By sliding the operating body forward along the window hole, the pen tip of the writing body connected to that one operating body is projected from the front end hole of the shaft tube, and the other writing that was in the protruding state first. A multi-core writing instrument that immerses the pen tip of the body in the shaft cylinder, and is configured to be separable in at least one place of the peripheral wall of the window hole in the radial direction, and at least one place of the peripheral wall of the window hole is separated in the radial direction When removing the operating body and the writing body from the inside of the shaft cylinder through the separation part of the peripheral wall of the window hole Possible and multifilamentary writing instrument, characterized in that the insertable configured in the barrel. The multi-core writing instrument according to claim 2, wherein the writing body and the operating body are connected to each other so that the writing body and the operating body can be removed from the shaft tube and inserted into the shaft tube. At least the front end or the rear end of the peripheral wall of the window hole is configured to be separable in the radial direction, and the window hole is opened forward or rearward by separating the front end or the rear end of the peripheral wall of the window hole in the radial direction. The multi-core writing instrument according to any one of claims 1 to 3. As the rear end of the peripheral wall of the window hole is separated in the radial direction, the side wall of the rear end portion of the shaft cylinder is configured to be separable in the radial direction, and the lid portion is attached to and detached from the side wall of the rear end portion of the shaft cylinder. The multi-core writing instrument according to any one of claims 1 to 4, wherein the side wall of the rear end portion of the shaft tube is held in a united state by a lid portion that is freely provided and attached to the side wall of the rear end portion of the shaft tube. Provided on the inner wall of the shaft cylinder is a projectile support part in which the front end of the projectile body abuts in the axial direction, and a holding section for holding the front end part of the projectile body in the radial direction is formed on the projectile support unit. The multi-core writing instrument according to any one of claims 1 to 5. The multi-core writing instrument according to any one of claims 1 to 6, wherein each of the operation bodies is colored with an ink color accommodated in a connected writing body.

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