JP6405774B2 - Writing instrument - Google Patents

Description

  In the present invention, both a mechanical pen and a ballpoint pen cartridge can be attached to one type of shaft cylinder main body, and in the case of a felt pen or the like, the shaft cylinder main body can also be used to share parts. The present invention relates to a writing instrument that can be used.

  Conventionally, there are various writing tools such as a mechanical pen, a ballpoint pen, a felt pen, a fluorescent marker pen, and a sign pen. As a structure of these writing instruments, a structure in which a cylindrical tail crown is attached to the rear end side inside the shaft cylinder main body, and a clip, a knocking member for centering, etc. are attached to the tail crown is known ( For example, see Patent Document 1 and Patent Document 2.) On the other hand, a product has been developed in which the design of the shape and color of the main body of the shaft tube is unified, and the mechanical pen, ballpoint pen, felt pen and the like are handled as a set.

  In the set product, it is usual that the design of the outer shape and color of the shaft tube main body is unified. However, since the functions and structures of cartridges such as mechanical pens, ballpoint pens, and felt pens are different from each other, it is necessary to prepare a dedicated shaft cylinder main body for each cartridge. As a result, there are problems that the number of parts increases and management becomes complicated, and that production costs increase.

  Therefore, the development of a completely new type of writing instrument that can be used for any cartridge such as a mechanical pen, a ballpoint pen, a felt pen, etc., with only one type of shaft body has been underway.

Japanese Patent No. 4834507 JP 2004-232742 A

  The present invention solves the above-described problems, and can be used as a shaft cylinder body for any of a mechanical pen, a ballpoint pen, a felt pen, etc., and the parts management can be simplified. In the case of pens and ballpoint pens, it is an object to provide a writing instrument that can easily replace the cartridge from the rear end side and can be produced at low cost.

The writing instrument of the present invention, which has been made to solve the above-mentioned problems, is provided with a cylindrical tail crown having an opening at the rear side inside the shaft barrel body, and a cartridge mounting member from the rear side inside the tail crown. The cartridge mounting member has a structure in which various pen cartridges are detachably attached to the tip of the cartridge mounting member, and the cartridge mounted on the cartridge mounting member passes through the opening of the tail crown and is pivoted. A writing instrument that is inserted into the cylinder body and has both a removal prevention function that prevents the cartridge attachment member from coming off from the tail crown and a rotation prevention function that prevents rotation of the cartridge attachment member relative to the tail crown, The removal prevention function includes a first locking projection provided on the outer periphery of the insertion tube portion of the cartridge mounting member, and the first locking projection is inserted until it passes through the opening of the tail crown. After that, when the cartridge mounting member is rotated around the axis of the shaft cylinder main body, the first locking protrusion is exhibited by locking with the peripheral wall end of the opening of the tail crown, When the cartridge mounting member is rotated, the anti-rotation function includes a convex portion provided on the inner periphery of the rear portion of the tail crown, and a first portion provided on the outer periphery of the insertion tube portion of the cartridge mounting member at a position facing the convex portion. 2 It is what is exhibited by latching with a latching protrusion .

The cartridge mounting member has a structure in which a cylindrical tail crown having an open end is attached to the rear side inside the shaft cylinder body, and a cartridge mounting member is inserted into the tail crown from the rear side for assembly. The cartridge of various pens is detachable at the tip of the cartridge, and the cartridge mounted on the cartridge mounting member passes through the opening of the tail crown and is inserted into the shaft cylinder body. A writing instrument having both a slip-off preventing function for preventing the cartridge from slipping out and a rotation preventing function for preventing the rotation of the cartridge mounting member with respect to the tail crown, wherein the slip-off preventing function and the rotation preventing function are inserted into the cartridge mounting member. After the fourth locking projection provided on the outer periphery of the tube portion and the fourth locking projection are inserted into the tail crown, the cartridge mounting member is centered on the shaft of the shaft cylinder body. And is provided at the end of the second recess when it rotates with the second recess provided on the inner periphery of the tail crown at a position facing the fourth locking projection. A writing instrument characterized in that a gently inclined surface is formed toward the protruding ridge, and the impact of locking between the fourth locking protrusion and the protruding ridge is reduced. It is set as the invention which concerns on.

The cartridge attachment member may be attached to the inside of the tail crown so as to be slidable to the pen tip side together with the cartridge, and this is an invention according to claim 3.

The tail cap may be integrally formed with the shaft main body, and this is the invention according to claim 4 .

  In the invention according to claim 1, a cylindrical tail crown having an open end is attached to the rear side inside the shaft barrel main body, and the cartridge mounting member is inserted into the tail crown from the rear side for assembly. The tip of the cartridge mounting member has a structure such that a mechanical pen and a ballpoint pen cartridge are detachable, and the cartridge mounted on the cartridge mounting member passes through the opening of the tail crown and enters the shaft cylinder body. Since it is inserted, it is possible to attach a cartridge shaft cylinder of a mechanical pen and a ballpoint pen to one type of cylinder main body and the cartridge mounting member, and it is possible to share parts. Further, the cartridge can be easily replaced from the rear side.

In addition, since the cartridge mounting member has both a function of preventing the cartridge mounting member from coming off from the tail crown and a function of preventing the rotation of the cartridge mounting member relative to the tail crown, the cartridge mounting member even after assembly. Is kept firmly fixed and can be used as a writing instrument.

Further, the removal preventing function includes a first locking projection provided on the outer periphery of the insertion tube portion of the cartridge mounting member, and after inserting the first locking projection until it passes through the opening of the tail crown, the cartridge mounting member is pivoted. When rotating about the axis of the cylinder body, the first locking projection is exhibited by locking with the peripheral wall end of the opening of the tail crown, while the rotation preventing function is the cartridge When the mounting member is rotated, the convex portion provided on the inner periphery of the rear portion of the tail crown and the second locking projection provided on the outer periphery of the insertion tube portion of the cartridge mounting member at a position facing the convex portion. Thus, the shaft cylinder body and the cartridge mounting member can be easily assembled, and the cartridge mounting member can be prevented from coming off and prevented from rotating.

In the invention according to claim 2, the removal prevention function and the rotation prevention function are the fourth locking protrusion provided on the outer periphery of the insertion tube portion of the cartridge mounting member, and after inserting the fourth locking protrusion into the tail crown, When the cartridge mounting member is rotated about the axis of the barrel main body, it is exhibited by locking with the second recess provided on the inner periphery of the tail crown at a position facing the fourth locking projection. In addition, a gently inclined surface is formed toward the ridge provided at the end of the second recess, and the impact of locking between the fourth locking projection and the ridge is reduced. Therefore, the assembly of the shaft tube main body and the cartridge mounting member can be easily performed, and the prevention of the cartridge mounting member from coming off and the prevention of rotation can be achieved.

In the invention according to claim 3, since the cartridge mounting member is slidably attached to the pen tip side together with the cartridge, a mechanical pen can be applied as the cartridge.

In the invention which concerns on Claim 4 , since a tail cap is integrally shape | molded by the axial cylinder main body, it can further reduce a number of parts with a simple structure.

It is the whole front sectional view showing the 1st embodiment of the present invention. It is a front view which shows a tail crown. It is a longitudinal cross-sectional view of FIG. It is AA sectional drawing in FIG. It is a perspective view which shows a tail crown. It is a front view which shows a cartridge attachment member. It is a longitudinal cross-sectional view of FIG. It is a perspective view which shows a cartridge attachment member. It is a front longitudinal cross-sectional view which shows the state which assembled the tail crown and the cartridge attachment member. It is BB sectional drawing in FIG. It is BB sectional drawing in FIG. It is a perspective view which shows the tail cap of a reference form . It is a perspective view which shows the cartridge attachment member of a reference form . It is a front view which shows the state which assembled the tail cap and cartridge attachment member of the reference form . It is a perspective view which shows the state which assembled the tail cap and cartridge attachment member of the reference form . It is a perspective view which shows the state which assembled the tail cap and cartridge attachment member of the reference form . It is a perspective view which shows the cartridge attachment member of 3rd Embodiment. It is a front view which shows the state which assembled the tail cap and cartridge attachment member of 3rd Embodiment. It is CC sectional drawing in FIG. It is CC sectional drawing in FIG. It is a front view which shows other cartridge attachment members. FIG. 22 is a perspective view of FIG. 21. It is a front view which shows the writing instrument using the cartridge attachment member of FIG. It is sectional drawing of FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front sectional view showing the present invention. In the figure, reference numeral 1 denotes a shaft cylinder body made of synthetic resin, metal or the like, and in the illustrated case, the cross-sectional shape perpendicular to the axial direction is triangular. In addition, the cross-sectional shape may be any of a round shape, an elliptical shape, a polygonal shape having a square shape or more.
In the figure, reference numeral 2 denotes a cylindrical tail cap made of a synthetic resin that is mounted on the rear side inside the shaft tube main body 1. The tail crown 2 has a cylindrical shape with an opening not only at the rear end but also at the front end, and has a structure in which the cartridge mounting member 3 is inserted into the tail crown from the rear side and assembled. 1a is a cap.

A cylindrical fitting holding portion 3a is formed at the tip of the cartridge mounting member 3, and the rear end portion of the cartridge 4 of various pens can be freely attached to and detached from the fitting holding portion 3a. . The cartridge 4 mounted on the cartridge mounting member 3 is inserted from the rear side of the tail crown 2 together with the cartridge mounting member 3 and is inserted into the shaft cylinder main body 1. As a result, the cartridge 4 passes through the opening of the tail cap 2 and is inserted toward the front side of the shaft tube main body 1, and the pen tip 4 a at the tip is exposed at the tip of the shaft tube main body 1.
The various pens mean a mechanical pen and a ballpoint pen. In the case of a mechanical pen, a centering mechanism is required, and therefore, it is necessary to have a structure in which the cartridge mounting member 3 is incorporated. Further, in the case of a felt pen, a fluorescent marker pen, a sign pen, etc., only the shaft tube main body 1 can be used. In this case, the tail cap 2 is replaced with a tail plug (not shown) and is airtightly fitted. Become.

  Further, the writing instrument of the present invention has both a removal preventing function for preventing the cartridge mounting member 3 from coming off from the tail crown 2 and a rotation preventing function for preventing the rotation of the cartridge mounting member 3 relative to the tail crown 2. Thereby, the state in which the cartridge mounting member 3 is firmly fixed is maintained, and excellent usability as a writing instrument is exhibited. Specific examples of the drop prevention function and the rotation prevention function will be described later.

In the writing instrument configured as described above, the cartridge mounting member 3 can be used as both a mechanical pen and a ballpoint pen cartridge. Further, in the case of a felt pen or the like, the shaft cylinder main body 1 can also be used. For this reason, it becomes possible to aim at commonality of components, such as the axial cylinder main body 1, the tail cap 2, and the cartridge attachment member 3, and can simplify component management.
In addition, since the design of the barrel body 1 is unified, mechanical pens, ballpoint pens, felt pens, etc. can be sold as a set, and the production cost as a set product should be low. Can do.

Next, the removal prevention function and the rotation prevention function will be described.
2 to 11 show a first embodiment. 2 to 5 show the tail crown 2, FIGS. 6 to 8 show the cartridge mounting member 3, and FIGS. 9 to 11 show the assembled state of the tail crown 2 and the cartridge mounting member 3, respectively. .
Since the cross-sectional shape of the axial tube main body 1 is a triangle, the outer shape of the tail crown 2 is a triangle (see FIG. 4). The tail cap 2 has a cylindrical shape in which a circular hole passage 5 is formed at the center, and has an opening not only at the rear end but also at the front end. Reference numeral 2a denotes an end portion of the peripheral wall of the opening, and three guide leg portions 2b extend from the peripheral wall end portion 2a at equal intervals. In the hole passage 5, guide grooves 5a are formed at equal intervals corresponding to the apexes of the triangle.

  The cartridge mounting member 3 has a cylindrical shape that can be inserted into the hole passage 5 of the tail crown 2, and has a fitting holding portion 3 a for the cartridge at the tip. In addition, three first locking protrusions 3b are provided at equal intervals on the outer periphery of the insertion tube portion.

With this configuration, as shown in FIG. 9, when the cartridge mounting member 3 is assembled to the tail crown 2, the first locking projection 3 b provided on the outer periphery of the insertion tube portion of the cartridge mounting member 3 is a hole passage. 5 is smoothly guided to the front end side by being guided by the guide groove 5a. Next, after inserting the first locking projection 3b until it passes through the opening of the tail crown 2, when the cartridge mounting member 3 is rotated around the axis of the shaft barrel body 1, the first locking projection 3b is The rear end side step portion 3 c is separated from the guide groove 5 a and is engaged with the peripheral wall end portion 2 a of the opening of the tail crown 2. As a result, the cartridge mounting member 3 cannot be moved rearward, and the function of preventing the removal is exhibited.
However, since the tip of the tail crown 2 is open, the cartridge mounting member 3 can be moved to the pen tip side, and in the case of a cartridge of a mechanical pen, the knockout operation of the center feeding can be normally performed.

On the other hand, when the cartridge mounting member 3 is rotated, the rotation preventing function has a convex portion 6a provided on the inner periphery of the rear portion of the tail crown 2 and an insertion cylinder portion of the cartridge mounting member 3 at a position facing the convex portion 6a. This is exhibited by the engagement with the second engagement projection 7 provided on the outer periphery of the projection.
FIG. 10 is a cross-sectional view taken along the line B-B in FIG. 9, in which three first recesses 6 are provided at equal intervals on the inner periphery of the tail crown 2, while Three second locking projections 7 are provided at equal intervals. Reference numeral 6 a denotes a convex portion provided in front of the first concave portion 6. Note that the state shown in FIG. 10 is a state in which the cartridge mounting member 3 is simply inserted into the tail cap 2, and the anti-rotation function has not yet been demonstrated.

When the cartridge mounting member 3 is rotated in the clockwise direction, as shown in FIG. 11, the second locking projection 7 gets over the convex portion 6 a and is locked, thereby preventing the rotation of the cartridge mounting member 3. Will be demonstrated. In addition, although the said convex part 6a is provided adjacent to the 1st recessed part 6 in the thing of illustration, you may leave | separate.
On the other hand, if the cartridge mounting member 3 is rotated counterclockwise, the locking relationship between the two can be released and the cartridge mounting member 3 can be taken out of the tail crown 2.
The second locking projection 7 and the convex portion 6a are configured to lock only the counterclockwise rotation, and do not restrict the stop position when further rotated clockwise. As the stop position regulating means, for example, the side wall of the first recess 6 may be provided, or a portion protruding from the first locking projection 3b may be provided adjacent to the peripheral wall end 2a.

12 to 16 show a reference form .
Three third locking projections 8 are provided at equal intervals on the outer periphery of the insertion tube portion of the cartridge mounting member 3. The third locking protrusion 8 is the same as the first locking protrusion 3b of the first embodiment described above, and the third locking protrusion 8 has a third locking protrusion provided on the outer periphery of the insertion tube portion of the cartridge mounting member 3. After inserting the protrusion 8 and the third locking protrusion 8 until it passes through the opening of the tail crown, when the cartridge mounting member 3 is rotated about the axis of the shaft barrel body 1, the opening of the tail crown 2 is This is achieved by locking with the peripheral wall end.

  On the other hand, when the shaft cylinder main body 1 is rotated, the rotation prevention function is exhibited by the engagement between the rear end portion of the third locking projection 8 and the projecting piece portion 9 extending to the peripheral wall end portion 2a. Is done. That is, a projecting piece 9 is extended at the peripheral wall end 2 a of the opening of the tail crown 2, and the rear end of the third locking projection 8 gets over the projecting piece 9 by the rotation of the shaft cylinder body 1. Then, the third locking projection 8 is fixed between the side edge of the leg base 2c and the protruding piece 9, and the rotation of the cartridge mounting member 3 is prevented.

17 to 20 show a second embodiment.
In the second embodiment, the removal prevention function and the rotation prevention function have a structure that is exhibited by the locking of a set of locking protrusions and recesses.
That is, three fourth locking projections 10 are provided at equal intervals on the outer periphery of the insertion tube portion of the cartridge mounting member 3. On the other hand, the inside of the tail crown 2 is positioned at a position facing the fourth locking projection 10. Three second recesses 11 are provided at equal intervals on the circumference. Further, a ridge 12 is provided on the front side of the second recess 11.

FIG. 18 shows a state in which the cartridge mounting member 3 is simply inserted into the tail crown 2, and the removal prevention function and the rotation prevention function are not yet exhibited.
Next, when the cartridge mounting member 3 is rotated counterclockwise, the fourth locking protrusion 10 gets over the protrusion 12 and enters the second recess 11 as shown in FIG. The fourth locking projection 10 and the second recess 11 are in a closely fitting relationship. Accordingly, since the fourth locking protrusion 10 does not move in the upward direction and the left-right direction, the function of preventing the cartridge mounting member 3 from being detached and the function of preventing rotation are exhibited.
On the other hand, if the cartridge mounting member 3 is rotated in the clockwise direction, the fitting relationship between the two can be released and the cartridge mounting member 3 can be taken out of the tail crown 2.
Also in the second embodiment , since the tip of the tail cap 2 is open, the cartridge mounting member 3 can be moved to the pen tip side (downward). The point that the knocking operation can be performed normally is the same as in the first embodiment.

  Further, a gently inclined surface 13 is formed toward the ridge 12 provided at the end of the second recess 11, and the impact of the engagement between the fourth locking projection 10 and the ridge 12 is reduced. If it is set as a structure, damage by abrasion of the protrusion 10 can be prevented, and it can be used over a long period of time.

FIG. 21 to FIG. 24 show an embodiment in which the tail cap is formed integrally with the shaft cylinder body.
Up to this point, the structure in which the tail crown 2 is mounted inside the separately-formed shaft cylinder main body 1 has been described. However, a structure in which the tail crown is integrally formed with the shaft cylinder main body may be used. Furthermore, the number of parts can be reduced.

  As apparent from the above description, in the present invention, the cartridge mounting member can be used for both a mechanical pen and a ballpoint pen, and in the case of a felt pen or the like, the shaft cylinder body 1 is used. Since it can be used also, parts management can be simplified. Further, there is an advantage that each cartridge can be easily replaced from the rear end side, and the production cost can be reduced. Furthermore, the cartridge mounting member is provided with both a prevention function for preventing the cartridge mounting member from coming off from the tail crown and a rotation preventing function for preventing the rotation of the cartridge mounting member with respect to the tail crown. There is also an advantage that the state is maintained and excellent usability as a writing instrument is exhibited.

DESCRIPTION OF SYMBOLS 1 Shaft cylinder main body 1a Cap 2 Cap 2a Circumferential wall edge 2b Guide leg 2c Leg base 3 Cartridge attachment member 3a Fitting holding part 3b First locking protrusion 3c Rear end side step 4 Cartridge 4a Pen tip 5 Hole Path 5a Guide groove 6 First recess 6a Projection 7 Second locking projection 8 Third locking projection 9 Projecting piece 10 Fourth locking projection 11 Second recess 12 Projection 13 Inclined surface

Claims (4)

The cartridge mounting member has a structure in which a cylindrical tail crown having an open end is attached to the rear side inside the shaft cylinder body, and a cartridge mounting member is inserted into the tail crown from the rear side for assembly. The cartridge of various pens is detachable at the tip of the cartridge, and the cartridge mounted on the cartridge mounting member passes through the opening of the tail crown and is inserted into the shaft cylinder body. A writing instrument having both a slip-off preventing function for preventing the cartridge mounting member and a rotation preventing function for preventing the cartridge mounting member from rotating relative to the tail crown, wherein the slip-off preventing function is provided on the outer periphery of the insertion tube portion of the cartridge mounting member. And after inserting the first locking projection until it passes through the opening of the tail crown, the cartridge mounting member is centered on the shaft of the barrel main body. The first locking projection is exerted by locking with the end of the peripheral wall of the opening of the tail crown, while the anti-rotation function is achieved when the cartridge mounting member is rotated. In addition, it is demonstrated by the engagement between the protrusion provided on the inner periphery of the rear part of the tail crown and the second engagement protrusion provided on the outer periphery of the insertion tube part of the cartridge mounting member at a position facing the protrusion. writing instruments, characterized in that there. The cartridge mounting member has a structure in which a cylindrical tail crown having an open end is attached to the rear side inside the shaft cylinder body, and a cartridge mounting member is inserted into the tail crown from the rear side for assembly. The cartridge of various pens is detachable at the tip of the cartridge, and the cartridge mounted on the cartridge mounting member passes through the opening of the tail crown and is inserted into the shaft cylinder body. A writing instrument having both a slip-off preventing function for preventing the cartridge from slipping out and a rotation preventing function for preventing the rotation of the cartridge mounting member with respect to the tail crown, wherein the slip-off preventing function and the rotation preventing function are inserted into the cartridge mounting member. After the fourth locking projection provided on the outer periphery of the tube portion and the fourth locking projection are inserted into the tail crown, the cartridge mounting member is centered on the shaft of the shaft cylinder body. And is provided at the end of the second recess when it rotates with the second recess provided on the inner periphery of the tail crown at a position facing the fourth locking projection. A writing instrument having a structure in which a gently sloping surface is formed toward the protruding line, and the impact of locking the fourth locking protrusion and the protruding line is reduced. The writing instrument according to claim 1 or 2, wherein the cartridge mounting member is mounted inside the tail crown so as to be slidable together with the cartridge toward the pen tip side.   The writing instrument according to any one of claims 1 to 3, wherein the tail crown is formed integrally with the shaft cylinder body.