JP2004090268A - Writing utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a writing utensil which is free from the disengagement of shaft cylinder or a cap by unexpected impact, vibration or the like during suspending the writing utensil and facilitates the engagement/disengagement of the shaft cylinder and the cap. <P>SOLUTION: This writing utensil is of the structure that the holder strip 11 is protruded from either of the members, i.e. the shaft cylinder 10 or the cap 20 and an engagement part 21 for releasing the holder strip 11 is formed on the other member. The holder strip 11 has an engagement projecting part 11b which juts out in the centripetal direction of the shaft cylinder, formed at the tip of a resilient piece part 11a which is inserted into the other member and resiliently slacks in the centripetal direction of the shaft cylinder. The engagement part 21 has a through-hole 21a formed on the peripheral wall of the other member, the engagement projecting part 11b of the holder strip 11 inserted into the through-hole 21a from inside being exposed. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a writing implement in which a cap is prevented from falling off, and more particularly to a writing implement suitable for hanging on a strap of a portable electronic device such as a mobile phone or a digital camera.
[0002]
[Prior art]
In a conventional writing instrument, a cap is fitted on a writing tip side of a barrel, and when used, the cap is pulled in the axial direction to be detached from the barrel.
In order to equip a portable electronic device such as a mobile phone or a digital camera with a writing instrument, a cap for the writing instrument is provided with a mounting hole for tying a strap attached to the portable electronic instrument, and only the shaft cylinder is removed during use. It is conceivable to use it.
[0003]
However, in the above-described conventional writing implement, there is a concern that the shaft barrel may come off from the cap tied to the strap when the writing implement is suspended on the strap of the portable electronic device and receives an unexpected impact.
Therefore, for example, by connecting a cap having a mounting hole for tying a strap or the like and a shaft cylinder by screw connection, as in a writing implement disclosed in Design 727226, the shaft cylinder is not easily detached from the cap. However, in this embodiment, it is troublesome to rotate and remove the barrel, and there is a concern that the barrel may come off due to vibration during suspension.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above-mentioned conventional circumstances, and a purpose thereof is to prevent a shaft cylinder or a cap from coming off due to an unexpected impact or vibration, and to attach / detach the shaft cylinder to / from a cap. An object of the present invention is to provide a writing instrument that can be easily performed.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a first aspect of the present invention relates to an engaged member that causes an engaging piece to protrude from one of a shaft cylinder and a cap and disengages the engaging piece from another member. A writing instrument forming a joint portion, wherein the engaging piece portion is inserted into the other member and is attached to a distal end of an elastic piece portion that can elastically bend in a shaft tube centripetal direction. The engaging portion is formed with a through hole in the peripheral wall of the other member, and the engaging piece is inserted into the through hole from inside. The projection is exposed.
[0006]
Further, in the second invention, the engaged portion includes a guide inclined surface that guides the engagement convex portion of the engagement piece portion to the through hole by slidingly contacting the engagement convex portion. It is characterized in that it is inclined in the shaft cylinder centrifugal direction as it goes to the one member side where the mating portion is formed.
[0007]
Further, in the third invention, the amount of bending of the engaging piece is limited by contacting one of the shaft cylinder and the cap with the engaging piece when bent. A flexure restricting portion is provided.
[0008]
Further, in the fourth invention, the hook piece is projected from one of the barrel and the tail plug, and the other member is formed with a hook hole for engaging and disengaging the hook piece. The hooking piece is provided with a hooking projection projecting in the shaft cylinder centrifugal direction at the tip of the elastic piece that is inserted into the other member and elastically bends in the shaft cylinder centripetal direction. The engaging hole is formed through the peripheral wall of the other member to expose the engaging convex portion inserted from the inside.
[0009]
According to a fifth aspect of the present invention, there is provided a writing instrument in which the engaging piece is projected from the barrel and the engaged portion is formed in a cap, wherein the engaging piece is located behind the barrel. It is characterized by being integrally formed at the front end of a detachable spacer having a tail plug covering the end opening and a side wall fitted into the side wall of the coaxial cylinder.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
This writing implement A1 includes a barrel 10 having an engagement piece 11, a cap 20 for engaging and disengaging an engaged portion 21 with the barrel 10, and a tail plug 30 attached to and detached from the rear end of the barrel 10. The ballpoint pen includes a refill 40 in the barrel 10 so as to be exchangeable.
[0011]
The shaft tube 10 has a substantially tubular shape with a transverse cross section, and the engaging piece 11 and the front end portion 12 protrude from a front end surface 10a thereof, and a tail plug 30 described later is hooked on a rear end side wall surface. Is formed integrally from a resin material having excellent toughness such as polyacetal (POM) so as to elastically bend the engaging piece 11.
[0012]
The engaging piece 11 is provided at the tip of an elastic piece 11a projecting forward in the axial direction from the front end face 10a of the barrel 10 in the distal direction of the barrel (in the horizontal direction of the axis in FIG. 1). 11b, and two symmetrical members are provided so as to sandwich the leading end portion 12.
[0013]
The elastic piece portion 11 a is formed to have an appropriate length such that the distal end side is elastically bent in the axial direction of the shaft cylinder (axial direction) and inserted into the cap 20.
[0014]
The engagement convex portion 11b has an outer surface on the distal end side as a guide inclined surface 11b1 inclined in the centripetal direction of the barrel.
When the engagement piece 11 is inserted into the cap 20, the guide inclined surface 11b1 slides on the inner edge 20a of the opening end of the cap 20 so that the distal end side of the engagement piece 11 moves in the axial direction. Flexes gradually.
[0015]
When the engagement piece 11 is pulled out of the cap 20 to the outside, the guide inclined surface 11b1 pivots the cap 20 by the elastic force when the bent engagement piece 11 returns. Lead backwards.
That is, when the bent engagement piece 11 returns, the engagement projection 11b tends to be displaced in the centrifugal direction of the barrel. However, the guide inclined surface 11b1 of the engagement projection 11b is In the state in which it is in contact with the cap 20a (see FIG. 1B), the engaging protrusion 11b is moved in a direction away from the cap 20 by sliding the guide inclined surface 11b1 at the inner edge 20a of the opening end.
[0016]
The front end portion 12 at the front end of the barrel 10 has a substantially cylindrical shape, and supports the front end side of the refill 40 on its inner peripheral surface.
[0017]
The cap 20 has a rectangular tube shape with a substantially horizontal cross-section that can be attached to and detached from the barrel 10, and has an engaged portion 21 at its rear end, a flexure limiting portion 22 inside, and first and second straps attached at its front end. The holes 23 and 24 are formed integrally.
[0018]
The engaged portion 21 has a through hole 21a formed in the side wall on the rear end side of the cap 20, and a guide inclined surface 21b formed on the inner surface of the side wall on the rear end side with respect to the through hole 21a. The left and right side walls are disposed so as to correspond to the left and right engagement pieces 11, 11.
[0019]
The through-hole 21a is a square hole that can be engaged with the engaging projection 11b of the engaging piece 11 and is opened to a size that can be pressed by a finger from the outside of the cap 20. The outer surface of the engaging projection 11b inserted from the inside is exposed outside the cap 20.
[0020]
The guide inclined surface 21b is a surface that is inclined in the centrifugal direction of the barrel as it goes toward the barrel 10, and when the barrel 10 is connected to the cap 20, the engagement piece 11 at the front end of the barrel 10 is formed. The engaging projections 11b are slid into contact with each other and guided to the through holes 21a, and when the barrel 10 is removed from the cap 20, the two engaging pieces 11 and 11 that attempt to expand the distal end side by the resilient force are used. The cap 20 is moved to the rear.
[0021]
That is, when the barrel 10 is detached from the cap 20, the engaging pieces 11, 11 are pressed by fingers from both outer sides. Then, the two engagement pieces 11, 11 move rearward in the axial direction by sliding the guide inclined surfaces 11b1, 11b1 of the two engagement protrusions 11b, 11b with a finger surface. When the two engaging projections 11b, 11b come into contact with the two guide inclined surfaces 21b, the two engaging projections 11b, 11b are spread by the elastic force of the two elastic pieces 11a, 11a. The slider slides rearward on the guide inclined surfaces 21b, 21b.
Further, as described above, in the state where the guide inclined surface 11b1 of the engagement convex portion 11b is in contact with the inner edge portion 20a of the opening end of the cap 20 (see FIG. 1B), the engagement convex portion 11b By sliding the inclined surface 11b1 at the inner edge 20a of the opening end, the cap 11 is moved away from the cap 20.
Accordingly, the two engaging pieces 11, 11 are detached from the engaged section 21 while being assisted by the elastic force of the two elastic pieces 11a, 11a that are elastically bent.
[0022]
The deflection restricting portions 22 are two plate-shaped portions disposed symmetrically with respect to the leading end portion 12 of the barrel 10 so as to be substantially parallel to the engagement pieces 11 of the barrel 10 in the cap 20. When the barrel 10 is removed from the cap 20, the amount of bending of the engagement piece 11 is limited.
That is, when the barrel 10 is detached from the cap 20, the two engaging pieces 11 exposed from both side surfaces of the cap 20 are pressed by the fingers. At this time, each of the bent engagement pieces 11 comes into contact with the deflection limiting portion 22, thereby limiting the amount of deflection, thereby preventing breakage due to excessive bending.
[0023]
When the barrel 10 is connected to the cap 20, the deflection limiting part 22 guides the leading end 12 of the barrel 10 approximately coaxially into the cap 20, so that the left and right engagement pieces 11 are formed. , And 11 are engaged with the left and right engaged portions 21 and 21 substantially simultaneously, so that an unstable engagement state in which only one of the engagement pieces 11 is engaged with the engaged portion 21 is avoided. To prevent.
[0024]
The first and second strap mounting holes 23 and 24 are holes for mounting the strap S1 of the portable electronic device, and are selectively used by a user.
[0025]
The first strap mounting hole 23 communicates with the through hole 21a of the engaged portion 21 so that the end of the strap S1 opposite to the knot is inserted into the cap 20 from the through hole 21a and the first strap mounting hole 23 is inserted into the cap 20. 23 so as to escape to the outside.
Therefore, according to the first strap mounting hole 23, the knot of the strap S1 can be hidden in the cap 20, and the appearance of the writing implement A1 can be improved.
[0026]
The second strap mounting hole 24 is a hole that penetrates from the front side to the back side of the writing instrument A1, and is suitable for mounting, for example, a ball chain strap S2 without a knot (see FIG. 4A).
[0027]
The tail plug 30 has a substantially U-shape in front view that covers the rear end opening of the barrel 10, and a hook piece 31 that is hooked into the barrel 10 at one end (the right end in FIG. 1). At the other end side (left end side in FIG. 1), and an insertion portion 32 that is inserted into the shaft cylinder 10 and abuts against the inner wall surface of the shaft cylinder 10. A refill support portion 33 for supporting the rear end of the refill 40 protrudes from a portion along the axis of the side surface.
[0028]
The hooking piece 31 is provided with a hooking projection 31b that is inserted into the rear end of the barrel 10 and that protrudes in the centrifugal direction of the barrel at the tip of an elastic piece 31a that is elastically bent in the centripetal direction of the barrel. The engaging projection 31b is inserted from the inside into the engaging hole 13 of the barrel 10 and is exposed outside the barrel 10.
Therefore, when the tail plug 30 is removed from the barrel 10 for replacement of the refill 40, the tail plug 30 is moved backward while pressing the exposed latching projection 31b with a tapered jig or the like. Just pull it.
[0029]
According to a preferred example of the present embodiment, in order to facilitate attachment / detachment of the hooking piece 31, only one hooking piece 31 is provided on the right end side of the tail plug 30 (the right end side in FIG. 1). The insertion portion 32 which is not hooked to the barrel 10 is provided on the left end side, but the insertion portion 32 is replaced with the hooking piece 31 having the above-described configuration so that the hooking piece 31 is provided at two places. It is also possible.
[0030]
The refill support portion 33 has a plurality of pressing ribs 33a1 for pressing the refill 40 on the inner front end side of a cylindrical portion 33a formed coaxially with the shaft cylinder 10 so as to fit the rear end of the refill 40. A plurality of receiving ribs 33a2 for receiving the rear end surface of the refill 40 are formed on the rear end side of the inner surface of the cylindrical portion 33a (see FIG. 2).
[0031]
The pressing rib 33a1 is a rib that protrudes in the axial direction from the inner surface of the cylindrical portion 33a and extends in the axial direction, and presses the outer peripheral surface of the refill 40 by a protruding end surface in the axial direction.
The receiving rib 33a2 is a rib that protrudes from the inner surface of the cylindrical portion 33a in the axial direction of the barrel and extends in the axial direction, and receives the rear end surface of the refill 40 by its axial front end.
[0032]
According to the refill support portion 33 having the above configuration, the clearance c is formed between the inner peripheral surface of the refill support portion 33 and the outer peripheral surface of the refill 40, and the clearance c allows ventilation between the outside and the inside of the refill 40. To
That is, the clearance c communicates with the rear end opening of the refill 40, the gap between the inner peripheral surface of the front end portion 12 of the barrel 10 and the outer peripheral surface of the refill 40, and the inner peripheral surface of the front end of the front end portion 12 with the refill. By communicating with the gap between the tip 41 and the outer peripheral surface of the front end 40, external air flows from the front end of the barrel 10 to the rear end opening of the refill 40.
[0033]
Thus, according to the writing implement A1 having the above configuration, as shown in FIG. 3, the writing implement A1 can be easily attached to the strap S1 of the portable electronic device B such as a mobile phone.
When the barrel 10 and the cap 20 are connected to each other, the engaging projections 11b of the engaging pieces 11 of the barrel 10 protrude in the centrifugal direction of the barrel, and the through-holes 21a of the engaged portion 21 are formed. , The shaft cylinder 10 does not come off due to unexpected impact or vibration.
Also, when removing the barrel 10 from the cap 20, it is possible to easily remove the barrel 10 by grasping the engaging projections 11 b, 11 b exposed from the through holes 21 a, 21 a of the cap 20 with fingers. it can.
Although the strap S1 is attached to the second strap attachment hole 24 according to the illustrated example, the strap S1 can be attached to the first strap attachment hole 23 according to a user's selection.
[0034]
Next, other examples of the use state of the writing implement A1 and other embodiments according to the present invention will be described.
FIG. 4A shows a use state in which a ball chain strap S2 is attached to the writing implement A1 having the above configuration, instead of the above-described string-shaped strap S1.
Further, a writing implement A2 shown in FIG. 4B is a mode in which the outer shape of the tip side of the cap 20 is changed to a shape different from that of the writing implement A1, and a string-shaped strap S1 is provided in the second strap mounting hole 24. Is installed.
Further, a writing implement A3 shown in FIG. 4 (c) is a mode in which the outer shape of the tip side of the cap 20 is changed to a shape different from that of the writing implement A1, and the cap 20 penetrates from the front side to the back side. The band-shaped strap S3 is attached to the square hole-shaped strap attachment hole 24.
[0035]
The writing implement A4 shown in FIG. 5A has a configuration in which the engaging piece 11 of the writing implement A1 is replaced with an engaging piece 11 ′ having a substantially U-shaped distal end. This is an embodiment in which the elasticity of the portion 11 'is improved.
Further, in the writing implement A5 shown in FIG. 5B, the arrangement of the engagement piece 11 and the front end 12 in the writing implement A1 is reversed, the engagement piece 11 is provided on the cap 20, and the shaft cylinder 10 is covered. In this embodiment, the engaging portion 21 is provided, and the engaging piece 11 that touches the finger is not provided at the front end side of the barrel 10, so that the grip feeling during writing can be improved.
[0036]
In the writing implement A5, the through hole 25 formed in the left side wall of the cap 20 cooperates with the first strap mounting hole 23 to act to insert the strap into the cap 20. Further, inside the front end side of the shaft cylinder 10, a bending restricting portion 22 for suppressing the amount of bending of the engaging piece 11 is provided. Reference numeral 26 in the cap 20 functions as a guide piece for guiding the front end portion 12 coaxially into the cap 20.
[0037]
Next, the writing implement A6 of the embodiment shown in FIGS. 6A and 6B includes a shaft cylinder 50 that stores the refill 40, a spacer 60 that covers the rear end opening of the shaft cylinder 50 and is fitted to both side surfaces. A cap 20 having the same configuration as that of the writing implement A1 is provided, and the spacer 60 has both functions of the tail plug 30 and the engaging piece 11.
[0038]
The shaft cylinder 50 is formed by omitting the engagement piece 11 from the shaft cylinder 10 of the writing implement A1, and forming vertical grooves 51, 51 for fitting the spacers 60 on both side walls.
[0039]
The spacer 60 has a substantially U-shape when viewed from the front, and has a tail plug 61 covering the rear end opening of the barrel 50, left and right side walls 62, 62 fitted into both side walls of the barrel 50, and both side walls. 62, 62 are integrally formed with left and right engaging pieces 63, 63 extending forward from the front ends thereof.
[0040]
The tail plug 61 has a cross-shaped cross-section receiving portion 61a protruding from the axial center side thereof, and receives the rear end surface of the refill 40 with the rear end opening of the barrel 50 closed.
The left and right side wall portions 62, 62 are fitted into the left and right vertical grooves 51, 51 of the barrel 50 to form both side walls of the barrel 50.
The engagement piece 63 has the same configuration as the engagement piece 11 of the writing implement A1, and has an elastic piece 63a, an engagement projection 63b, and a guide inclined surface 63b1.
[0041]
【The invention's effect】
The present invention is configured as described above, and has the following functions and effects.
According to the first aspect of the invention, when connecting the barrel and the cap, the engagement piece protruding from one member is inserted into the other member, and the engagement protrusion of the engagement piece is covered. The engaging portion is engaged with the through hole. In this engaged state, since the engaging projection projects in the centrifugal direction of the barrel and engages with the through hole, it does not come off even if the barrel or cap is pulled in the axial direction.
Also, when separating the shaft cylinder and the cap, if the engaging projection exposed from the through hole of the engaged part is pressed, the elastic piece of the engaging piece elastically elastically moves in the shaft cylinder centripetal direction. As a result, the engagement between the engaging projection and the through hole is released.
Therefore, the shaft cylinder or the cap does not come off due to unexpected impact, vibration, or the like at the time of suspension, and the shaft cylinder and the cap can be easily attached and detached.
[0042]
In addition, according to the second aspect, when the engaging piece is disengaged from the engaged part, the engaging convex is caused by the elastic force when the bent engaging piece returns, and the shaft cylinder is centrifuged. It slides on the guide inclined surface that is inclined in the direction, and slips out of the engaged portion. Therefore, the cap can be more easily removed.
[0043]
Moreover, according to the third aspect, the amount of bending of the engaging piece is limited by the bending restricting portion, so that damage of the engaging piece due to excessive bending can be prevented.
[0044]
Furthermore, according to the fourth invention, it is possible to provide a detachable tail plug that does not easily come off due to an unexpected shock or vibration during suspension, and the inside of a refill or the like can be provided by attaching or detaching the tail plug. Replacement of parts can be facilitated.
[0045]
Further, according to the fifth aspect, by providing the spacer with both the functions of the tail plug and the engagement piece, each component of the barrel, the cap, and the spacer can be formed in a simple structure, and as a result, each component can be formed. The moldability and productivity of parts can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of a writing instrument according to the present invention, in which (a) shows a state in which a barrel and a cap are connected, and (b) shows a state in which the barrel and the cap are separated.
FIG. 2 is an enlarged side view of a main part showing a rear end side of the writing instrument.
FIG. 3 is a diagram showing a state of use of the writing instrument.
FIG. 4A is a front view showing a state in which a ball chain strap is attached to a cap of the writing instrument, and FIGS. 4B and 4C are front views each showing another example of the cap.
FIGS. 5A and 5B are main part front views showing another example of the engagement piece and the engaged part, respectively, in FIGS.
6A and 6B show another example of the writing instrument according to the present invention, wherein FIG. 6A is a front view showing a state where a shaft cylinder and a cap are separated, and FIG. 6B is an exploded front view.
[Explanation of symbols]
10: Shaft tube 11: Engagement piece 11a: Elastic piece 11b: Engagement convex part 11b1: Guide inclined surface 13: Engagement hole 22: Deflection restriction part 20: Cap 21: Engagement part 21a: Through hole 30: Tail plug 31: Hook piece 31a: Elastic piece 31b: Hook projection 60: Spacer 61: Tail plug 62: Side wall 63: Engagement piece A1: Writing implement S1: Strap

Claims (5)

A writing implement that protrudes an engagement piece from one of a shaft cylinder and a cap and forms an engaged portion on the other member to disengage the engagement piece.
The engaging piece is provided with an engaging projection projecting in the centrifugal direction of the barrel at the tip of an elastic piece that is inserted into the other member and elastically bendable in the centripetal direction of the barrel. ,
A writing instrument, wherein the engaged portion forms a through hole in a peripheral wall of the other member, and exposes an engaging projection of the engaging piece inserted into the through hole from the inside. The engaged portion includes a guide inclined surface that slides the engagement protrusion of the engagement piece to guide the engagement protrusion to the through hole.
2. The writing implement according to claim 1, wherein the guide inclined surface is inclined in a centrifugal direction of the barrel as it goes toward the one member on which the engagement piece is formed. One of the shaft cylinder and the cap is provided with a bending limiting portion that limits the amount of bending of the engaging piece by abutting on the engaging piece when bent. 3. The writing implement according to claim 1, wherein While projecting the latching piece from either one of the barrel and the tail plug, the other member has a latching hole for engaging and disengaging the latching piece,
The hooking piece is provided with a hooking projection projecting in the shaft cylinder centrifugal direction at the tip of an elastic piece that is inserted into the other member and elastically bends in the shaft cylinder centripetal direction,
The writing implement according to any one of claims 1 to 3, wherein the engagement hole is formed to penetrate a peripheral wall of the other member, and exposes the engagement protrusion inserted from the inside. A writing implement that protrudes the engagement piece from the barrel and forms the engaged part in a cap,
The engagement piece is integrally formed on a front end of a detachable spacer having a tail plug covering a rear end opening of the barrel and a side wall fitted into a side wall of the coaxial cylinder. The writing implement according to any one of claims 1 to 4, characterized in that:

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