JP6824091B2 - Multi-core writing tool - Google Patents

Description

The present invention relates to a multi-core writing instrument.

Conventionally, in Patent Document 1, a plurality of cursive bodies are movably housed in a barrel, and each of the cursive bodies is urged rearward by an elastic body, and the rear end of each of the cursive bodies is used. An operating body corresponding to each cursive is connected to the cursive, and a plurality of window holes extending in the front-rear direction are pierced in the side wall of the barrel in the radial direction, and the respective window holes extend radially outward from the respective cursive holes. By projecting the operating body and sliding one operating body forward along the window hole, the pen tip of the cursive connected to the one operating body is projected from the front end hole of the barrel and first. A multi-core cursive that allows the pen tip of another cursive that was in a protruding state to be immersed in the barrel, and is provided with an openable and closable opening at the rear end of the barrel to open the window hole rearward. A multi-core cursive is disclosed, wherein the cursive and the operating body are configured to be removable from the inside of the barrel and inserted into the barrel via a portion.

JP-A-2007-38635

In the multi-core writing tool of Patent Document 1, when the operating body and the cursive are inserted into the shaft cylinder through the opening of the shaft cylinder, the locking projections on the outer surfaces of both side walls of the operating body are properly placed inside the window hole. There was a risk that the cursive would be inserted into the barrel without being inserted (that is, there was a risk of erroneous insertion of the operating body). If the operating body is erroneously inserted, not only the cursive can not be moved, but also the locking projection of the operating body and the outer surface of the barrel may be damaged.

The present invention solves the above-mentioned conventional problems, and avoids erroneous insertion of the operating body when the operating body and the writing body are inserted into the shaft cylinder through the opening of the shaft cylinder. It is intended to provide a multi-core writing instrument that can be used.
In the present invention, "front" refers to the pen tip side, and "rear" refers to the opposite side. In the present invention, the pen tip protruding state refers to a state in which the pen tip protrudes outward from the front end of the barrel, and the pen tip immersion state refers to a state in which the pen tip is immersed inside the barrel.

In the present invention, a plurality of cursives 7 are housed in the barrel 2 so as to be movable in the front-rear direction, each of the cursives 7 is urged rearward by the elastic body 6, and after each of the cursives 7. An operating body 8 corresponding to each cursive 7 is connected to the end, and a plurality of window holes 41 extending in the front-rear direction are pierced in the side wall of the barrel 2 in the radial direction from each of the window holes 41 in the radial direction. Each of the operating bodies 8 is projected outward, and by sliding one operating body 8 forward along the window hole 41, the pen tip 71 of the cursive 7 connected to the one operating body 8 is released. Along with protruding from the front end hole 31 of the barrel 2, the pen tip 71 of the other cursive 7 that was in the protruding state earlier is immersed in the barrel 2, and the rear end of the cursive 2 An openable / closable opening 5 for opening the window hole 41 rearward is provided, and the operating body 8 and the cursive body 7 can be removed from the inside of the barrel 2 and inside the barrel 2 through the opening 5. A lid 9 is provided at the rear end of the barrel 2 so that the operating body 8 of the cursive 7 in the pen tip immersion state can be brought into contact with the cursive so that the opening 5 can be opened and closed. In a multi-core cursive, locking projections 82 are formed on the outer surfaces of both side walls of each of the operating bodies 8, and the locking projections 82 can be engaged with the inner surfaces of both side walls of each window hole 41 in the front-rear direction. The engaging wall portion 42 extending to is formed, the rear end of the engaging wall portion 42 is located in front of the rear end of the barrel 2, and the opening 5 is formed at the rear end of the barrel 2. A first opening 51 that opens rearward, a second opening 52 that communicates with the first opening 51 and opens radially outward, and a rear end of the engaging wall portion 42. A third opening 53 that communicates with the second opening 52 and opens rearward, the width dimension W1 of the first opening 51, the width dimension W2 of the second opening 52, and the like. The width dimension W3 of the third opening 53 is formed to be larger than the maximum dimension T1 between the locking projections 82 and the locking projections 82 on the outer surfaces of both side walls of the operating body 8.

The multi-core writing tool 1 of the present invention has the operating body 8 and writing through any of the first opening 51, the second opening 52, and the third opening 53 according to the above configuration. The body 7 can be inserted into the barrel 2, and when the operating body 8 and the writing body 7 are inserted into the barrel 2 through the opening 5 of the barrel 2, the operating body 8 may be erroneously inserted. Can be avoided.

Further, in the multi-core writing instrument 1 of the present invention, in the above configuration, the rear end portion of the locking projection 82 of the operating body 8 of the writing body 7 is rearward of the rear end of the engaging wall portion 42 in the pen tip immersion state. (That is, the rear end of the locking projection 82 is located behind the rear end of the engaging wall portion 42, and the front end of the locking projection 82 is forward of the rear end of the engaging wall portion 42. (Located in) is preferable. As a result, the amount of insertion of the operating body 8 and the cursive 7 into the shaft cylinder 2 can be shortened, and the writing body 7 is not deeply inserted into the shaft cylinder 2 in the erroneously inserted state, and the locking projection 82 and the shaft cylinder are not inserted. 2 damage can be prevented.

Further, in the multi-core writing tool 1 of the present invention, in the above configuration, a reduced diameter portion 45 is formed on the outer surface of the rear end portion of the barrel 2 behind the engaging wall portion 42, and the front end of the reduced diameter portion 45 is said. It is preferable that it coincides with the rear end of the engaging wall portion 42. As a result, the radial thickness of the second opening 52 becomes smaller, and the locking projection 82 can be easily inserted into the second opening 52. As a result, the operating body 8 and the cursive 7 can be smoothly inserted into the shaft cylinder 2, and when the operating body 8 and the cursive 7 are inserted into the shaft cylinder 2 through the opening 5 of the shaft cylinder 2, the operating body 8 and the writing body 7 can be smoothly inserted into the shaft cylinder 2. It is possible to avoid the occurrence of erroneous insertion of 8.

Further, in the multi-core writing tool 1 of the present invention, it is preferable that a convex curved surface (R curved surface) 42a or a chamfer (inclined surface) is formed at the rear end corner portion of the engaging wall portion 42 in the above configuration. As a result, when the operating body 8 is slid forward, the finger is prevented from being caught by the rear end of the engaging wall portion 42, and the operating body 8 can be smoothly slid forward. The convex curved surface 42a or the chamfer width dimension W4 is preferably set in the range of 0.1 mm to 0.3 mm.

The multi-core writing instrument of the present invention can avoid erroneous insertion of the operating body when the operating body and the writing body are inserted into the shaft cylinder through the opening of the shaft cylinder.

It is a vertical cross-sectional view which shows the state which the opening of the rear end portion of the axle cylinder of the 1st Embodiment of this invention is closed. It is a vertical cross-sectional view of the state in which the opening of FIG. 1 is opened. It is a front view of the main part which shows the rear part of the axle cylinder of FIG. It is a perspective view which shows the rear part of the axle cylinder of FIG. It is a top view of the axle cylinder of FIG. It is an enlarged side view of the main part of the operation body and the cursive body of FIG. It is an enlarged front view of the main part of the operation body and the cursive body of FIG. It is a perspective view of the main part in a state where the opening of FIG. 1 is opened and the operating body and the cursive are removed. It is a perspective view of the main part of FIG. It is a front view of the main part which shows the rear part of the axle cylinder of the 2nd Embodiment of this application. It is a perspective view which shows the rear part of the axle cylinder of FIG. It is a perspective view of the main part in a state where the opening of FIG. 10 is opened and the operating body and the cursive are removed. FIG. 3 is a perspective view of a main part showing a state in which a cursive is housed in the shaft cylinder of FIG. 10 and the opening at the rear end of the shaft cylinder is closed. It is a front view of the main part which shows the rear part of the axle cylinder of the 3rd Embodiment of this application. It is a perspective view which shows the rear part of the axle cylinder of FIG. It is a perspective view of the main part in a state where the opening of FIG. 14 is opened and the operating body and the cursive are removed. FIG. 6 is a perspective view of a main part showing a state in which a cursive is housed in the shaft cylinder of FIG. 14 and the opening at the rear end of the shaft cylinder is closed. It is a front view of the main part of FIG.

<First Embodiment>
The first embodiment of the present invention is shown in FIGS. 1 to 9.

In the multi-core writing instrument 1, a plurality of (specifically, five) cursive bodies 7 are housed in a barrel 2 so as to be movable in the front-rear direction. Each of the cursives 7 is urged rearward by each of the elastic bodies 6 (specifically, a compression coil spring). In the present embodiment, the number of cursive 7s accommodated in the barrel 2 is 5, but other than this, for example, 2, 3, 4, or 6 may be used.

(Shaft tube)
The axle cylinder 2 includes a tapered cylindrical front shaft 3 and a cylindrical rear shaft 4 connected to the rear end of the front shaft 3.

(Front axis)
The front shaft 3 is obtained from a synthetic resin molded product or a metal processed product. A front end hole 31 is formed in the front end of the front shaft 3 in the front-rear direction. The outer surface of the front shaft 3 is provided with a grip portion made of an elastic material. The front shaft 3 may be composed of one component or a plurality of components.

(Rear axis)
The rear shaft 4 is obtained from a synthetic resin molded product or a metal processed product. A plurality of window holes 41 extending in the front-rear direction (for example, five, which is the same number as the number of cursive 7s to be accommodated) are radially formed on the side wall of the rear shaft 4. A spring support portion 47 that supports the front end of the spring is integrally formed on the inner wall of the rear shaft 4. The spring support portion 47 has a plurality of inner holes on which each cursive 7 slides. In the spring support portion 47, the front end of the spring is directly or indirectly supported via another member. The window holes 41 of the rear shaft 4 are arranged at equal intervals in the circumferential direction. A clip 21 is provided on one side wall of the rear shaft 4 between the window holes 41. The rear shaft 4 may be composed of one component or a plurality of components.

(Engagement wall)
Engagement wall portions 42 extending in the front-rear direction are formed on the inner surfaces of both side walls of each of the window holes 41. The locking projections 82 on the outer surfaces of both side walls of the operating body 8 are engaged with the engaging wall portion 42. In a state where the locking projection 82 of the operating body 8 and the engaging wall portion 42 are engaged with each other, the operating body 8 can move in the front-rear direction along the window hole 41.

(Locking wall)
A locking wall portion 43 formed of ribs extending in the front-rear direction is formed on the inner surface of the barrel 2. When the writing body 7 appears and disappears, the locking projection 82 slides on the radial outer surface of the locking wall portion 43 of the operating body 8. In the cursive 7 with the pen tip protruding, the rear end of the operating body 8 is locked to the front end of the locking wall portion 43.

(Aperture)
As shown in FIG. 8, at the rear end of each of the window holes 41, an opening 5 that opens in a notch shape behind the rear end of the barrel 2 (that is, the rear end of the rear shaft 4) is formed. .. A second opening 51 formed at the rear end of the barrel 2 and opening rearward, and a second opening 51 communicating with the first opening 51 and opening radially outwardly. It includes an opening 52 and a third opening 53 formed at the rear end of the engaging wall portion 42, which communicates with the second opening 52 and opens rearward. The width dimension W1 of the first opening 51, the width dimension W2 of the second opening 52, and the width dimension W3 of the third opening 53 are the locking projections 82 on the outer surfaces of both side walls of the operating body 8. It is formed larger than the maximum dimension T1 between the and the locking projection 82 and the maximum outer diameter T2 of the cursive. As a result, the operating body 8 and the cursive 7 (the operating body 8 is placed at the rear end) through any of the openings of the first opening 51, the second opening 52, and the third opening 53. The connected cursive 7) is configured to be removable from the barrel 2 and insertable into the barrel 2. In the present embodiment, the width dimension W1 of the first opening 51, the width dimension W2 of the second opening 52, and the width dimension W3 of the third opening 53 are each formed to have the same dimensions. To.

(Reduced diameter part)
A reduced diameter portion 45 is formed on the outer surface of the rear end portion of the axle cylinder 2 behind the engaging wall portion 42. The front end of the reduced diameter portion 45 coincides with the rear end of the engaging wall portion 42. A step portion 46 is formed between the front end and the rear end of the reduced diameter portion 45 and the outer surface of the side wall of the shaft cylinder. The step portion 46 and the rear end of the engaging wall portion 42 are formed by the same surface. Further, the step portions 46 connect the rear ends of adjacent engaging wall portions 42 with each other on the same surface. The reduced diameter portion 45 reduces the radial thickness of the second opening 52, making it easier to insert the locking projection 82 into the second opening 52. As a result, the operating body 8 and the cursive 7 can be smoothly inserted into the barrel 2, and when the operating body 8 and the cursive 7 are inserted into the barrel 2 through the opening 5 of the barrel 2, the operating body 8 and the cursive 7 can be smoothly inserted into the barrel 2. It is possible to avoid the occurrence of erroneous insertion of 8.

(Cursive)
Each of the cursive 7s is a ballpoint pen refill, and contains a ballpoint pen tip (that is, a pen tip 71) in which a ball is rotatably held at the front end, and an ink container having the ballpoint pen tip at the front end and an open rear end. It consists of a tube 72. Inside the ink storage tube 72, an ink composed of a water-based gel ink having shear thinning, a low-viscosity water-based ink, a low-viscosity oil-based ink, or a high-viscosity oil-based ink is stored. When the ink is a water-based gel ink having shear thinning, a low-viscosity water-based ink, or a low-viscosity oil-based ink, a high-viscosity fluid advancing as the ink is consumed at the rear end of the ink in the ink storage tube 72. A follower composed of is filled.

(Operating body)
An operating body 8 is attached to the rear end of each of the cursives 7 (that is, the rear end opening of the ink storage tube 72). The operating portion 81 of each of the operating bodies 8 projects radially outward from each of the window holes 41. By pressing the operation unit 81 forward, the pen tip 71 is brought into a protruding state, and the pen tip protruding state of the other cursive 7 is released.

(Locking protrusion)
Locking protrusions 82 are formed on the outer surfaces of both side surfaces of the operating body 8. The locking projection 82 is composed of ribs extending in the axial direction. The maximum dimension T1 between the locking projections 82 and the locking projections 82 on the outer surfaces of both side walls of the operating body 8 is the width dimension W1 of the first opening 51 and the width dimension W2 of the second opening 52. And the width dimension W3 of the third opening 53 is formed smaller than the width dimension W3. The axial length L1 of the locking projection 82 is formed to be smaller than the axial distance L2 between the rear end of the barrel 2 and the rear end of the engaging wall portion 42.

(Cover)
A lid 9 for opening and closing the opening 5 (first opening 51) is provided at the rear end of the barrel 2. The lid portion 9 is rotatably attached to the hinge portion. A contact wall portion 91 is formed on the front surface of the lid portion 9. The rear end of each operating body 8 connected to the rear end of the immersive cursive 7 is brought into contact with the contact wall portion 91.

An engaging portion 92 (specifically, an engaging hole) is provided on the front surface of the lid portion 9, and an engaged portion capable of engaging with the engaging portion 92 is provided at the rear end of the rear shaft 4. 44 (specifically, an engaging protrusion) is provided. The engaging portion 92 and the engaged portion 44 are in an engaged state with each other when the lid portion 9 closes the opening 5, and the operating body 8 and the front surface of the lid portion 9 are urged to the rear of the spring. In the contact with the contact wall portion 91, the engaged state is not released and the lid portion 9 does not open.

(Spring support)
A spring support portion 47 is integrally formed on the inner wall of the rear shaft 4. The spring support portion 47 is provided with a plurality of (specifically, five) inner holes through which each cursive 7 is inserted in the axial direction. A spring is arranged between the rear surface of the spring support portion 47 and each of the operating bodies 8. Each cursive 7 is loosely inserted inside each of the springs.

In the pen tip immersion state, the operating body 8 of the writing body 7 is in contact with the lid portion 9, and the locking projection 82 of the operating body 8 is locked to the engaging wall portion 42. Further, in the pen tip immersion state, the locking projection 82 of the operating body 8 of the writing body 7 is projected rearward from the rear end of the engaging wall portion 42. (See Fig. 9)

In the multi-core writing tool 1 of the present embodiment, locking projections 82 are formed on the outer surfaces of both side walls of each of the operating bodies 8, and the locking projections 82 engage with the inner surfaces of both side walls of each of the window holes 41. An engaging wall portion 42 extending in a possible front-rear direction is formed, the rear end of the engaging wall portion 42 is positioned in front of the rear end of the barrel 2, and the opening 5 is the rear end of the barrel 2. After the first opening 51 formed in the above and opening rearward, the second opening 52 communicating with the first opening 51 and opening radially outward, and the engaging wall portion 42. A third opening 53 formed at the end, communicating with the second opening 52 and opening rearward, the width dimension W1 of the first opening 51, the second opening 52. The width dimension W2 and the width dimension W3 of the third opening 53 are formed to be larger than the maximum dimension T1 between the locking protrusions 82 and the locking protrusions 82 on the outer surfaces of both side walls of the operating body 8. The operating body 8 and the writing body 7 can be inserted into the barrel 2 through any of the openings of the first opening 51, the second opening 52, and the third opening 53, and the operation can be performed. When the body 8 and the writing body 7 are inserted into the shaft cylinder 2 through the opening 5 of the shaft cylinder 2, it is possible to avoid erroneous insertion of the operating body 8.

In the multi-core writing instrument 1 of the present embodiment, in the pen tip immersion state, the rear end portion of the locking projection 82 of the operating body 8 of the writing body 7 is projected rearward from the rear end of the engaging wall portion 42. Is preferable. With the above configuration, the amount of insertion of the operating body 8 and the writing body 7 into the shaft cylinder 2 can be shortened, and the writing body 7 is not deeply inserted into the shaft cylinder 2 in the erroneously inserted state, and the locking projection 82 and the shaft can be inserted. Damage to the cylinder 2 can be prevented.

In the multi-core writing tool 1 of the present embodiment, a reduced diameter portion 45 is formed on the outer surface of the rear end portion of the barrel 2 behind the engaging wall portion 42, and the front end of the reduced diameter portion 45 is the engaging wall portion. It is preferable that it coincides with the rear end of 42. As a result, the radial thickness of the second opening 52 becomes smaller, and the locking projection 82 can be easily inserted into the second opening 52. As a result, the operating body 8 and the cursive 7 can be smoothly inserted into the shaft cylinder 2, and when the operating body 8 and the cursive 7 are inserted into the shaft cylinder 2 through the opening 5 of the shaft cylinder 2, the operating body 8 and the writing body 7 can be smoothly inserted into the shaft cylinder 2. It is possible to avoid the occurrence of erroneous insertion of 8.

<Second Embodiment>
A second embodiment of the present invention is shown in FIGS. 10 to 13.
The multi-core writing tool of the present embodiment is a modification of the first embodiment, and a convex curved surface 42a is formed at the rear end corner of each engaging wall portion 42. As a result, when the operating portion 81 of the operating body 8 is slid forward, the finger is prevented from being caught by the rear end of the engaging wall portion 42, and the operating body 8 can be smoothly slid forward. The width dimension W4 (radius of curvature of the convex curved surface 42a) of the convex curved surface 42a is set to 0.25 mm. Since the other configurations are the same as those of the first embodiment, the description thereof will be omitted.

<Third embodiment>
A third embodiment of the present invention is shown in FIGS. 14 to 18.
The multi-core writing tool of the present embodiment is a modification of the second embodiment, in which the outer surfaces of the rear ends of the shaft cylinders 2 between the window holes 41 have substantially the same outer diameter, and the second embodiment is used. It is a configuration in which the reduced diameter portion 45 and the step portion 46 of the embodiment do not exist. In the present embodiment, as in the second embodiment, a convex curved surface 42a is formed at the rear end corner portion of each engaging wall portion 42. As a result, when the operating portion 81 of the operating body 8 is slid forward, the finger is prevented from being caught by the rear end of the engaging wall portion 42, and the operating body 8 can be smoothly slid forward. Further, in the multi-core writing tool of the present embodiment, since the outer surfaces of the rear ends of the barrels 2 between the window holes 41 have substantially the same outer diameter, the operating body 8 can be slid forward more smoothly. it can. The width dimension W4 (radius of curvature of the convex curved surface 42a) of the convex curved surface 42a is set to 0.25 mm. Since the other configurations are the same as those of the first embodiment and the second embodiment except that the outer shape of the lid portion 9 is different, the description thereof will be omitted.

1 Multi-core cursive 2 Shaft tube 21 Clip 3 Front shaft 31 Front end hole 4 Rear shaft 41 Window hole 42 Engaging wall 42a Convex curved surface 43 Locking wall 44 Engagement 45 Reduced diameter 46 Step 47 Spring support 5 Opening 51 First opening 52 Second opening 53 Third opening 6 Cursive 7 Cursive 71 Pen tip 72 Ink storage tube 8 Operating body 81 Operating unit 82 Locking protrusion 9 Lid 91 Contact wall portion 92 Engaging portion L1 Axial length of locking projection L2 Axial distance between the rear end of the barrel and the rear end of the engaging wall portion W1 Width dimension of the first opening W2 Second Width dimension of opening W3 Width dimension of third opening T1 Maximum dimension between locking projections T2 Maximum outer diameter of cursive

Claims (4)

A plurality of cursives are housed in the barrel so as to be movable in the front-rear direction, each of the cursives is urged rearward by the elastic body, and the rear end of each of the cursives corresponds to each cursive. The operating bodies are connected to each other, and a plurality of window holes extending in the front-rear direction are pierced in the side wall of the barrel in the radial direction, and the respective operating bodies are projected outward in the radial direction from each of the window holes. By sliding the operating body forward along the window hole, the pen tip of the cursive connected to that one operating body is projected from the front end hole of the barrel, and the other that was in the protruding state earlier. The pen tip of the cursive is immersed in the barrel, and an openable opening / closing opening for opening the window hole rearward is provided at the rear end of the barrel, and the operating body and the operating body and the operating body and the opening are provided through the opening. The cursive is configured to be removable from the inside of the barrel and insertable into the barrel, and the operating body of the cursive with the pen tip immersed is in contact with the rear end of the barrel, and the opening A multi-core cursive with a lid that allows the part to be opened and closed.
Locking protrusions are formed on the outer surfaces of both side walls of each of the operating bodies, and engaging wall portions extending in the front-rear direction with which the locking protrusions can be engaged are formed on the inner surfaces of both side walls of the respective window holes. A first opening in which the rear end of the engaging wall portion is located in front of the rear end of the barrel and the opening is formed in the rear end of the barrel and opens rearward, and the first opening. A second opening that communicates with the portion and opens outward in the radial direction, and a third opening that is formed at the rear end of the engaging wall portion and communicates with the second opening and opens rearward. The width dimension of the first opening, the width dimension of the second opening, and the width dimension of the third opening are the locking projections and the locking projections on the outer surfaces of both side walls of the operating body. A multi-core writing tool characterized by being formed larger than the maximum size between and. The multi-core writing tool according to claim 1, wherein the rear end portion of the locking projection of the operating body of the cursive is projected rearward from the rear end of the engaging wall portion in the pen tip immersion state. The first or second aspect of claim 1 or 2, wherein a reduced diameter portion is formed on the outer surface of the rear end portion of the barrel rearward from the engaging wall portion, and the front end of the reduced diameter portion coincides with the rear end of the engaging wall portion. Multi-core writing tool. The multi-core writing tool according to any one of claims 1 to 3, wherein a convex curved surface or a chamfer is formed on the rear end corner portion of the engaging wall portion.

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