JP2000037988A - Safety mechanism of writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety mechanism that can make a clip itself malfunction physically in a state of writing instruments projected. SOLUTION: There are provided a bridge 30 crossing over a clip 20 and a clip relative reciprocation mechanism that can control the distance between the bridge 30 and the end part (thick part 21A) of the side of a tip end port 11 in the clip 20. The clip relative reciprocation mechanism is rendered operable to contract the distance between the bridge 30 and the end part 21A of the side of the tip end port 11 in the clip 20 as the tip 16A of a pen is projected from the tip end part 11, and extend the distance between the bridge 30 and the end part 21A of the side of the tip end port 11 in the clip 20 as the tip 16A is not projected from the tip end port. Further, an open and close mechanism is provided for the purpose of clogging the tip end port 11 during the period of non-use.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety mechanism for an extended ballpoint pen. More specifically, the present invention relates to a safety mechanism that disables a clip for holding it in a pocket or the like in a writable state.

[0002]

2. Description of the Related Art As a technique related to the present invention, a multi-axis protruding and retracting mechanism of an extension type writing instrument and a so-called safety mechanism will be described. In addition, about the part number, it followed the gazette.

As a typical example of a writing instrument having a plurality of writing axes, Japanese Utility Model Publication No. 41-321 will be described with reference to FIG.

[0004] This technique is based on the following technique: "The notch holes 2 and 2 'are formed in the neck portion of the pen shaft 1 symmetrically, and a partition wall 3 is provided. , The partition 3 has a guide hole 5 and two-sided parallel slides 5 formed thereby.
5 'and engaging step portions 6 and 6' are provided so that the projections 7 and 7 'of the pushers 4 and 4' are slidably fitted into the guide holes 5 and are engaged with the engaging step portions 6 and 6 '. Two-color ballpoint pen ". According to this technique, when one pen tip is protruding, writing can be stably performed with that pen tip, and when the pusher of the other ballpoint pen is pressed slightly, the pen tip can be stored.

[0005] In addition, a ballpoint pen having a plurality of types of nibs with one brush shaft is disclosed in Japanese Utility Model Publication No. 46-2336.
No. 6 and the like. Needless to say, there are various variations of the multiaxial ballpoint pen on the market.

On the other hand, as a typical example of a dispensing type writing instrument, there is a "knock type writing instrument" disclosed in Japanese Utility Model Laid-Open No. 59-162288. This will be described with reference to FIG. This knock-type writing instrument has a pressing element 2 at the rear end of the barrel 1,
A writing body 3 is disposed in the inside so as to be able to move back and forth, and the writing body 3 is urged against the pressing element 2, and an engaging portion 4 b is provided at the front of the clip 4 attached to the rear part of the barrel 1. Engaging portion 2 that is interlocked with presser 2 by knocking presser 2
This is a knock-type writing instrument in which c is engaged with a locking portion 4b of the clip 4 so that the writing portion 3a of the writing body 3 projects from the tip of the barrel 1. A hole 1a is provided in the barrel 1 at a position facing the clip 4, and when the writing portion 3a is stored in the barrel 1, the safety piece 2d projecting from the hole 1a and interlocking with the pressing element 2 is clipped. It is arranged at the front of the mounting portion 4c.

According to the knock type writing instrument, the clip 4
Is opened and inserted into the chest pocket of a Y-shirt.
The writing piece 3 is returned by touching the safety piece 2d protruding from the position a and interlocking with the pressing element 2. For this reason, the probability that the inside of the breast pocket of the Y-shirt is stained by the writing body 3 can be reduced. This mechanism can be applied to a multi-axis ballpoint pen and the like.

[0008]

Problems to be Solved by the Invention
In the technique disclosed in Japanese Patent No. 162288, the form of the clip 4 itself does not change due to the appearance of the writing part 3a.

[0009] The problem to be solved by the present invention is that the clip itself is physically difficult to function in a state where the writing portion is protruding, so that a technique intended to reduce accidents due to the protruding writing portion is proposed. To provide.

Here, an object of the present invention is to provide a safety mechanism in which the clip itself is in a form that is physically difficult to function when the writing portion is protruding. .

Another object of the present invention is to provide a safety mechanism which closes a tip end of the writing portion where the writing portion protrudes when the writing portion is submerged. .

A technique for solving the above-mentioned problem is disclosed in a database (PATH) of the Japan Patent Information Organization (JAPIO).
Prior art search using IS) did not find it.

[0013]

SUMMARY OF THE INVENTION The present invention is to achieve the above object.

(Claim 1) The invention according to claim 1 is a cylindrical shaft.
A pen tip (16A) that can freely come out of the tip end (11) of (10) and a clip (20) located on the opposite side of the pen tip (16A) in the axial direction.
In a writing instrument with a bridge (30) straddling the clip (20), the distance between the bridge (30) and the end (thick portion 21A) of the tip (11) side of the clip (20) can be extended and contracted. When the pen tip (16A) protrudes from the tip port (11), the clip relative retraction mechanism includes a bridge (30) and a tip port (11) in the clip (20).
The tip of the pen (16A) to the tip end (1A).
In the case of not protruding from 1), the safety mechanism of a writing implement characterized by moving so as to extend the distance between the bridge (30) and the end (21A) of the clip (20) on the side of the tip end (11). Related.

(Definition of terms) The "writing implement" is a composite writing implement formed by a ballpoint pen, a fountain pen, a brush pen, a magic pen, a mechanical pencil, a correction liquid pen, or the like, or a combination thereof.

The "pen point (16A)" is connected to the tip end (11) of the cylindrical shaft (10).
The mechanism using a spring retracted inside the cylinder shaft (10) and the mechanism that allows the pen tip (16A) to extend and retract A mechanism for changing to a directional motion is typical, and the present invention includes both mechanisms.

The clip (20) is formed so that the end on the tip end (11) side is in contact with the cylindrical shaft (10) so as to be pressed, and an elongated space is provided from the contact point to the opposite end. Have been.

The "clip relative advance / retreat mechanism" includes a clip (2
Either or both of the (0) and the bridge (30) are formed so as to be able to advance and retreat in the axial direction of the cylindrical shaft (10).

(Function) The relative movement mechanism of the clip is
When the (16A) protrudes from the tip port (11), the end (21) of the bridge (30) and the clip (20) on the tip port (11) side is used.
A) and shorten the distance. Because the distance is shorter,
The end (21A) of the clip (20) on the tip end (11) side and the cylinder shaft
It is hard to pinch a thin object between (10). Therefore, with the pen tip (16A) protruding, the clip (2
0) will be difficult to function. For this reason, the writing implement employing the safety mechanism according to the present invention cannot be caught in a Y-shirt pocket or the like, so that the probability of soiling the Y-shirt can be reduced.

In order to enable the clip (20) to function, a clip relative advance / retreat mechanism is provided for the bridge (30).
The distance between the end of the clip (20) and the end (21A) on the side of the distal end opening (11) may be increased. That is, the pen tip (16
It is sufficient that A) does not protrude from the distal end port (11).

(Claim 2) The invention according to claim 2 limits the safety mechanism of the writing instrument according to the invention according to claim 1, and the clip relative advance / retreat mechanism is fixed to the cylindrical shaft (10). It is characterized by comprising a bridge (30) and a clip (20) which advances and retreats with respect to the bridge (30).

(Function) The relative movement mechanism of the clip
If the (16A) protrudes from the tip port (11), move the clip (20) toward the tip port (11), and the ends of the bridge (30) and the clip (20) on the tip port (11) side. (21A) and shorten the distance. Since the distance is short, it is difficult to sandwich a thin object between the end (21A) of the clip (20) on the side of the distal end port (11) and the cylindrical shaft (10). Therefore, it is difficult for the clip (20) to function when the pen tip (16A) is projected. For this reason, the writing implement employing the safety mechanism according to the present invention cannot be caught in a Y-shirt pocket or the like, so that the probability of soiling the Y-shirt can be reduced.

To enable the function of the clip (20), the clip relative advance / retreat mechanism is used.
May be moved to the side opposite to the distal end opening (11) to increase the distance between the bridge (30) and the end (21A) of the clip (20) on the distal end opening (11) side.

(Claim 3) The invention according to claim 3 limits the safety mechanism of the writing instrument according to the invention according to claim 1, and the clip relative advance / retreat mechanism is fixed to the cylinder shaft (10). It is characterized by comprising a clip (20) and a bridge (30) moving forward and backward with respect to the clip (20).

(Action) The clip relative advance / retreat mechanism is
When the (16A) projects from the tip port (11), the bridge (30) is moved toward the tip port (11), and the end of the clip (20) and the bridge (30) on the tip port (11) side. Section (21A). Because the distance is shorter, clip (20)
It is difficult to sandwich a thin object between the end (21A) on the side of the distal end port (11) and the cylindrical shaft (10). Therefore, it is difficult for the clip (20) to function when the pen tip (16A) is projected. For this reason, the writing implement employing the safety mechanism according to the present invention cannot be caught in a Y-shirt pocket or the like, so that the probability of soiling the Y-shirt can be reduced.

In order to enable the clip (20) to function, the clip relative advance / retreat mechanism includes a bridge (30).
May be moved to the side opposite to the distal end opening (11) to increase the distance between the bridge (30) and the end (21A) of the clip (20) on the distal end opening (11) side.

(Claim 4) The invention according to claim 4 limits the safety mechanism of the writing instrument according to the invention according to claim 1, 2, or 3, and the bridge mechanism uses a clip relative advance / retreat mechanism. If the distance between the (30) and the end (21A) of the clip (20) on the tip opening (11) side is extended, prevent the pen tip (16A) from protruding from the tip opening (11). A lock mechanism is provided.

(Explanation of terms) The lock mechanism is a pen point (16A)
This is a mechanism that makes operation of the pen tip (16A) in and out of the tip end (11) of the cylindrical shaft (10) inoperable.

(Operation) When the distance between the bridge (30) and the end (21A) of the clip (20) on the side of the tip end (11) is extended, the clip (20) can be made to function. .
In this case, the lock mechanism is activated and the pen tip (16A)
Cannot be projected. Therefore, the pen tip (16A)
It is possible to reduce the probability of an accident due to the projection of the vehicle.

(Claim 5) The invention according to claim 5 limits the safety mechanism of the writing instrument according to the invention described in claim 1, 2, 3, or 4 and includes a bridge (30). ) And the end on the tip end (11) side of the clip (20)
(21A) is an opening / closing mechanism that opens and closes the tip port (11) in conjunction with the distance to the tip port (11) .When the distance increases, the tip port (11) is closed. ) Is provided.

(Explanation of terms) The "opening / closing mechanism" means that the tip opening (11) is opened when the writing implement is to be in a writable state,
A mechanism for closing the tip end (11) when writing is completed. Specifically, for example, a flexible shaft provided with a lid (22) on the distal end opening (11) side is advanced and retracted, and a clip (2
On the side of the distal end opening (11) opposite to the side of (0), a lid (17A) for closing the distal end opening (11) is provided. The mechanism for moving the shaft body may be either a spring type or a rotary type.

(Operation) When the distance between the bridge (30) and the end (21A) of the clip (20) on the side of the distal end (11) increases, the opening / closing mechanism closes the distal end (11). Therefore, the pen tip (16A) cannot be protruded. Therefore, the probability of an accident due to the protrusion of the pen tip (16A) can be reduced.

When the distance between the bridge (30) and the end (21A) of the clip (20) on the tip end (11) side is reduced, the opening / closing mechanism opens the tip end (11). The protrusion of 16A) is possible, but the clip (20) cannot be used.
Therefore, the probability of an accident due to the protrusion of the pen tip (16A) can be reduced.

[0034]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to embodiments and drawings. The drawings used here are FIGS. 1 to 10. FIG. 1 is a perspective view showing a first embodiment of the present invention. FIG. 2 is a sectional view of a main part according to the first embodiment. 3 to 6
FIG. 3 is a component diagram according to the first embodiment. FIG. 7 is a perspective view showing a second embodiment of the present invention. FIG.
FIG. 9 is a perspective view and a sectional view showing a third embodiment of the present invention. FIG. 10 is a perspective view showing a fourth embodiment of the present invention. Some of the part numbers may be the same as those used in the prior art, but are not related to the prior art. (First Embodiment) FIG. 1 shows a three-color ballpoint pen employing a safety mechanism according to the present invention.

The three-color ball-point pen has a cylindrical shaft 10 that allows a pen tip 16A of a writing shaft 16 to protrude and retract from a tip end port 11, a writing shaft support cap 12 that is connected to the cylindrical shaft 10, and supports the writing shaft 16 so that it can move forward and backward. A clip 20 interlocked with a lid shaft 17 that advances and retreats from the writing shaft support cap 12 in the same manner as the writing shaft 16 and opens and closes the tip end port 11, straddles the clip 20, and is formed integrally with the writing shaft support cap 12. The bridge 30 is formed.

The cylindrical shaft 10 is, as shown in FIG.
It is a cylindrical body whose one side is tapered.

As shown in FIG. 6, the writing shaft 16 has a pen tip 16A at the tip of a flexible ink cartridge. The other side of the pen tip 16A is connected to the writing shaft extruded body 14 by compressing a coiled spring 15.

The clip 20 has a spring 15 contracted in the same manner as the writing shaft extruded body 14, so that the axial direction of the three-color ballpoint pen can be moved forward and backward. The opening / closing of the distal end opening 11 is performed by moving forward and backward, and includes a lid shaft 17 which is a flexible shaft, and a lid 17A attached to the tip of the lid shaft 17. I have.

Referring to FIG. 2 in detail, the clip 20 includes a clip body 21 having a thick portion 21A having a thick tip, and a butt portion 21B located on the opposite side of the thick portion 21A across the bridge 30. The upper projection 22 that is caught on the other writing shaft extruded body 14 when closing the distal end port 11, the outer projection 23 that is caught when the other writing shaft extruded body 14 is extruded, and larger than the diameter of the coil spring. A spring stopper 24 is provided, and a connection projection 25 for connecting to the lid shaft 17 is provided.

The shape of the writing shaft extruded body 14 shown in FIG. 3 is also similar to the clip 20 except for the clip body 21, and has a butt portion 14A, an upper protrusion 14B, an outer protrusion 14C, a spring stopper 14D, and A connection projection 14E for connecting to the writing shaft 16 is provided.

Near the axial center of the three-color ballpoint pen,
In order to stably advance and retreat the lid shaft 17 and the three writing shafts 16, a spacer 13 as shown in FIGS. 1 and 4 is provided.

The operation and effect of the above embodiment will be described.

First, when not used as a ballpoint pen, the tip end port 11 is closed. At this time, the clip 20 moves toward the distal end port 11, and the upper protrusion 22 is hooked on the other writing shaft extruded body 14. The spring 15 between the spring stopper 24 and the spacer 13
Has been disguised. At this time, the lid shaft 17 connected to the connection protrusion 25 also moves to the distal end port 11 side, and the lid 17A attached to the distal end closes the distal end port 11 from the inside.
For this reason, even if the ink of the ballpoint pen is aqueous or neutral, it is possible to prevent the pen tip 16A from drying,
Comfortable for next use. Further, since the distance between the thick portion 21A of the clip 20 and the bridge 30 is widened, the clip 20 is in a usable state. Therefore, the clip 20 can be used to insert the pocket into the Y-shirt, but since none of the three types of writing shafts 16 protrude from the distal end port 11, it is possible to prevent an accident of soiling the Y-shirt.

Next, in order to make any of the three writing shafts 16 protrude, the pushing of the buttocks 14A of one writing shaft extruded body 14 is started. Then, the outer protrusion 14C of the writing shaft extruded body 14 is hooked on the upper protrusion 22 of the clip 20, and the remaining two outer projections 14C of the writing shaft extruded body 14 lack stability. The thick part 21 </ b> A is instantly brought close to the bridge 30, and the distal end opening 11 is opened. Further, the buttocks 14A of one writing shaft extruded body 14 are kept pressed, and the hanging projections 14C are hooked on the hanging projections 23 of the returned clip 20 and the hanging projections 14C of the remaining two writing shaft extruded bodies 14. Then, the pen tip 16A protrudes from the tip end 11, and writing becomes possible. At this time, the thick portion 2 of the clip 20
1A and the bridge 30 are close to each other, there is no space for sandwiching an object, and the clip 20 cannot be used. For this reason, for example, even if it tries to insert it in the pocket of a Y-shirt, it cannot be inserted.

(Second Embodiment) Next, a second embodiment will be described with reference to FIG. 7 while referring to differences from the first embodiment.

The second embodiment is different from the first embodiment in that the bridge 30 which is integrated with the writing shaft support cap 12 in the first embodiment is a separate member. As a result, there is an advantage that flexibility in assembling work is obtained, and replacement is possible in case of breakage or the like.

(Third Embodiment) Next, a third embodiment will be described with reference to FIG. 8, with respect to differences from the first embodiment.

A first point of difference between the third embodiment and the first embodiment is a "clip relative advance / retreat mechanism" described in the claims. That is, the first embodiment uses the clip 2
However, in the third embodiment, the bridge is moved instead of moving the zero. It is assumed that the clip 20 is integral with the writing shaft support cap 12, and the internal structure of the bridge 32 is provided with an upper projection, an outer projection, and a spring stopper, and the spring 33 is compressed.

A second difference is that an opening / closing mechanism for opening / closing the distal end port 11 is not used, and a lock mechanism (not shown) is used instead. When the bridge 32 is separated from the thick portion 21A of the clip 20, the lock mechanism locks all three writing shafts 16 so that they cannot advance or retreat. Specifically, as shown in FIG. 9, a bridge base 35 that moves forward and backward together with the bridge 32 in the internal mechanism of the bridge 32 is provided. In addition, a stopper 34 is provided at the center of the inside of the writing shaft support cap 12 and protrudes toward the pen tip 16A.
Due to this lock mechanism, the pen tip 16A does not protrude from the distal end port 11 when the clip 20 is usable. Therefore, the accident of soiling the Y-shirt can be prevented.

On the contrary, this lock mechanism is released when the bridge 32 is brought close to the thick portion 21A of the clip 20. In this case, the three pen tips 16A are
Can freely appear and disappear, but since the clip 20 cannot be used, it is difficult for the user to insert the clip even if they are almost unconscious, and it is possible to prevent an accident of soiling the Y-shirt.

Although the opening / closing mechanism is omitted in the embodiment shown in FIG. 8, an opening / closing mechanism may be provided, and depending on the type of ink (for example, aqueous or gel ink), it may be better to provide it.

(Fourth Embodiment) Next, a fourth embodiment will be described with reference to FIG. 10 with respect to differences from the third embodiment.

The fourth embodiment is different from the third embodiment in that the pen tip 16A is retractable when the bridge 32 is separated from the thick portion 21A of the clip 20. A lock mechanism that locks any of the three writing shafts 16 so that they cannot advance or retreat is employed as in the third embodiment. For this reason, when the clip 20 is usable, the pen tip 16A does not protrude from the distal end port 11. Therefore, the accident of soiling the Y-shirt can be prevented.

On the contrary, the lock mechanism is released when the bridge 32 is brought close to the thick portion 21A of the clip 20. In this case, the three pen tips 16A are
Can freely appear and disappear, but since the clip 20 cannot be used, it is difficult for the user to insert the clip even if they are almost unconscious, and it is possible to prevent an accident of soiling the Y-shirt.

Although the opening / closing mechanism is omitted in the embodiment shown in FIG. 10, an opening / closing mechanism may be provided, and depending on the type of ink (for example, aqueous or gel ink), it may be better to provide it.

[0056]

According to the first to fourth aspects of the present invention, it is possible to provide a safety mechanism in which the clip itself has a form that is difficult to function physically when the writing portion is projected. .

According to the fifth aspect of the present invention, in addition, it is possible to provide a safety mechanism that closes a tip opening from which the tip of the writing portion projects when the writing portion is submerged. Was.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part according to the first embodiment.

FIG. 3 is a component diagram according to the first embodiment.

FIG. 4 is a component diagram according to the first embodiment.

FIG. 5 is a component diagram according to the first embodiment.

FIG. 6 is a component diagram according to the first embodiment.

FIG. 7 is a perspective view showing a second embodiment of the present invention.

FIG. 8 is a perspective view showing a third embodiment of the present invention.

FIG. 9 is a sectional view showing a third embodiment of the present invention.

FIG. 10 is a perspective view showing a fourth embodiment of the present invention.

FIG. 11 is a cross-sectional view showing an example of the related art.

FIG. 12 is a cross-sectional view showing an example of the related art.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Shaft barrel 11 Tip opening 12 Writing shaft support cap 13 Spacer 14 Writing shaft extruded body 14A Butt portion 14B Upper projection 14C Hanging projection 14D Spring stop 14E Connection projection 15 Spring 16 Writing shaft 16A Nib 17 Lid shaft 17A Lid 20 Clip 21 Clip body 21A Thick part 21B Butt part 22 Upper projection 23 Hanging projection 24 Spring stop 25 Connection projection 30 Bridge 32 Bridge member 33 Spring 34 Stopper 35 Bridge base

Claims (5)

[Claims] 1. A writing instrument comprising a pen tip which can be inserted into and retracted from a tip end of a cylindrical shaft, and a clip which is located on an opposite side of the pen tip in an axial direction, comprising: a bridge spanning the clip; A clip relative advance / retreat mechanism capable of extending and retracting a distance from the end on the end opening side, wherein the clip relative advance / retreat mechanism is configured such that, when the pen tip protrudes from the tip end, the end of the bridge and the clip on the tip end side. A writing mechanism, wherein the distance between the bridge and the clip is extended when the pen tip does not protrude from the tip end, so as to extend the distance between the bridge and the end of the clip on the tip end side. 2. The safety mechanism for a writing instrument according to claim 1, wherein the clip relative advance / retreat mechanism includes a bridge fixed to the cylinder shaft, and a clip which advances / retreats with respect to the bridge. 3. The safety mechanism for a writing instrument according to claim 1, wherein the clip relative advancing / retracting mechanism includes a clip fixed to the cylinder shaft and a bridge that advances / retreats with respect to the clip. 4. A lock mechanism for preventing the pen tip from protruding from the distal end when the distance between the bridge and the distal end of the clip is extended by the clip relative advance / retreat mechanism. Claim 1, characterized in that:
A safety mechanism for a writing instrument according to claim 2. 5. An opening / closing mechanism for opening and closing a tip port in conjunction with a distance between a bridge and an end on a tip port side of a clip, wherein the tip port is closed and contracted when the distance is extended. 5. The safety mechanism for a writing instrument according to claim 1, further comprising an opening / closing mechanism for opening a front end port.