JP2001018578A - Writing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to adjust length of a writing tool. SOLUTION: A writing tool 10 is constituted by providing a writing tool main body 12 on the apex side of which a lead 11 is provided and a cylindrical body 13 inserted from the back end side of this writing tool main body. The cylindrical body 13 is provided with a stopper piece 41 in its inside end part and this stopper piece 41 makes the whole length of the writing tool 10 to the shortest dimension at a position where this stopper piece 41 penetrates into a hole 23 of the writing tool main body 12. A coil spring 44 is arranged between the cylindrical body 13 and the writing tool main body 12 and when the stopper piece 41 falls down from the hole 23 by operation of a push button 18, the cylindrical body 13 is projected from the back end of the writing tool main body 12 by energizing force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument, and more particularly, to a writing instrument whose overall length can be expanded or contracted as required.

[0002]

2. Description of the Related Art Conventionally, writing implements such as a dispensing writing implement, a ball-point pen, and a felt-tip pen have been constructed so that the total length thereof is constant. Among these writing instruments, those having a protective cap for a writing member can be used with a longer overall length by removing the cap and fitting the cap to the rear end of the writing instrument. Further, as another configuration for increasing the total length of the writing implement, a cylindrical writing implement main body from which a writing member protrudes, and an outer cylinder which is fitted around the rear end side outer periphery thereof and is relatively movable in the axial direction with the writing implement main body. There is also known a writing instrument composed of two members.

[0003]

However, when the cap is fitted to the rear end of the writing instrument to increase the overall length, the cap itself is not so long, so that the overall length cannot be greatly extended. In addition, it is necessary to attach the cap to the rear end of the writing instrument main body, and when making the overall length longer, a so-called one-touch operation cannot be performed.

Further, in a writing instrument of a type comprising two members, a writing instrument body and an outer cylinder, when the outer cylinder is pushed into the writing instrument body side and has the shortest dimension, the tip of the outer cylinder and the writing instrument are A step is formed between the main body and the step, and this step becomes a hindrance when writing with the shortest dimension. In addition, in the configuration in which the outer cylinder is provided outside the writing instrument main body, the outer cylinder inevitably has a larger diameter, and therefore, the outer diameter of the writing instrument main body side is designed to be a diameter that is easy to grasp. This leads to the disadvantage that the degree of freedom is reduced. In addition, since the outer cylinder is configured to be moved along the outer peripheral surface of the writing instrument main body, it cannot be applied to a side-knock type writing instrument because the movement must be performed without any trouble.

[0005]

SUMMARY OF THE INVENTION The present invention has been devised in view of such inconvenience, and its object is to reduce the length to the shortest dimension when not in use and to reduce the length to the longest dimension when used. It is another object of the present invention to provide a writing instrument that can be designed and that is not restricted in design freedom.

It is another object of the present invention to provide a writing instrument having a simple operation in which the operation for setting the length to the longest dimension can be performed by a so-called one-touch operation.

A further object of the present invention is to provide a writing instrument which can be used as an accessory such as a relatively small notebook or card holder.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a tubular writing instrument main body having a writing member protruding at the distal end thereof, and a movable member provided at the rear end side of the writing implement main body so as not to fall off. And a moving member, wherein the moving member is constituted by a tubular body which is inserted inside the writing tool main body and is provided so as to be movable in the axial direction, and the tubular body is pushed into the writing member side. The shortest dimension when
The maximum length is reached when the movement limit in the direction of exiting the writing instrument body is reached. By adopting such a configuration, it is possible to set the outer diameter size that is easy to grasp on the writing instrument main body without being restricted by the outer diameter of the writing instrument main body while adopting the configuration that changes the length. . In addition, since no step is formed between the cylindrical body and the area where the finger can be hung during writing, good writing workability can be ensured even when the shortest dimension is used.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a spring is provided between the tip of the cylindrical body and the writing instrument main body, and the spring is biased by the spring so that the cylindrical body protrudes from the rear end of the writing instrument main body. It is preferable to adopt a configuration in which power is supplied. According to this structure, the operation for elongating the writing implement can be performed extremely quickly.

[0010] A configuration is also adopted in which a stopper mechanism is provided between the writing instrument main body and the tubular body when the tubular body is at the shortest dimension position, the stopper mechanism holding the position. As a result, the state in which the cylindrical body is pushed into the writing instrument main body to make the writing instrument the shortest dimension can be maintained, and suitability as an accessory such as a small notebook can be provided.

Further, the stopper mechanism is provided at an inner end of the cylindrical body and is always directed outward in the radial direction of the cylindrical body. The stopper mechanism is formed on the writing instrument main body. And a push button provided on the writing instrument main body and capable of being pressed from the outside toward the receiving portion, and the stopper piece can be pushed out of the receiving portion by pressing the push button. Is provided. With such a configuration, the operation for changing from the shortest dimension to the maximum dimension can be performed with one touch, while the cylindrical body can be set to the shortest dimension simply by pushing it into the writing instrument body Becomes

[0012] Further, while a core feeding mechanism is provided in the writing instrument main body, a knock portion is provided on an outer peripheral portion of the writing instrument main body, and a side knock type is provided in which the core feeding mechanism is operated by pressing the knock portion. The configuration described above can also be adopted.

In this specification, unless otherwise specified, "tip", "front end", "front" or "front"
Is used for the writing member side of the writing instrument,
"Rear" or "rear" is used for the opposite side.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a front view of an embodiment in which the present invention is applied to a so-called side knock type dispensing writing instrument, and FIG. 2 shows a front view of the writing instrument having the longest dimension. Have been. In these figures, the writing implement 10
Is a cylindrical writing instrument main body 12 having a lead 11 made of graphite as a writing member protruding from the distal end side, and a cylindrical body serving as a moving member housed in the writing instrument main body 12 from the rear end side of the writing instrument main body 12. 13.

As shown in FIGS. 3 and 4, the writing instrument main body 12 includes an outer cylinder 15 having a diameter gradually reduced toward the front, and a core feeding mechanism 16 disposed in the outer cylinder 15. It is configured. As shown in FIG. 1, a long elliptical knock portion 17 along the axial direction is arranged on the outer peripheral portion of the outer cylinder 15, and a push button 18 is provided at a rear position adjacent to the knock portion 17. Are located. The knock portion 17 is rotatably provided on the right end side with the left end side in FIG. 3 as a fulcrum, and has a shape provided with a pressing projection 20 directed toward the center of the outer cylinder 15 on the inner surface side on the right end side. Is provided. Further, the push button 18 is non-detachably mounted in a raised ring-shaped portion 21 formed on the peripheral surface portion of the outer cylinder 15 and having a substantially circular shape in plan view. A hole 23 as a receiving portion is formed in a portion on the bottom side of the raised ring-shaped portion 21, and a coil spring 25 is arranged between the outside of the hole 23 and the push button 18. The push button 18 is always kept urged outward by the coil spring 25.

The lead-out mechanism 16 includes a hopper-type lead receiving portion 26 located at the rear end side, a cam member 27 provided around the leading end side of the lead receiving portion 26, and a front position of the cam member 27. And a chuck 28 provided at the bottom. The cam member 27 has a pressure receiving surface 30 having a rear end formed as an inclined surface. The pressure receiving surface 30 is provided so as to always contact the pressing protrusion 20 via a return spring (not shown). .

The cylindrical body 13 is provided with a smaller diameter than the outer cylinder 15, and the tip side is formed as a thick portion 32 whose outer diameter dimension is slightly enlarged. On the other hand, on the rear end side, a cap 35 is detachably provided via a connecting cylinder 34 (not shown) for holding an eraser.

The outer peripheral surface of the thick portion 32 is
Surface contact with the inner peripheral surface of the outer cylinder 15.
A front stepped portion 36 formed on a substantially central inner peripheral surface of the outer cylinder 15;
The writing implement 10 is movable between the rear step portion 37 formed on the inner peripheral surface of the rear end, and the writing tool 10 has the shortest dimension when the front end surface of the thick portion 32 is slightly closer to the front step portion 36. The writing implement 10 is set to have the longest dimension at the position where the rear end face of the thick part 32 abuts against the rear step part 37, that is, at the retreat limit.

As shown in FIG. 5, slits 40 extending in the axial direction from the rear end of the cylindrical body 13 are formed at two positions along the circumferential direction in the cylindrical body 13 including the thick part 32, as shown in FIG. The space between these slits 40 is configured as a stopper piece 41. The stopper piece 41 is formed such that a position slightly shifted outwards partially becomes an initial position, and such that the stopper piece 41 always presses the inner surface of the outer cylinder 15 while being housed in the outer cylinder 15. Has become. Here, a stopper mechanism is constituted by the stopper piece 41 and the above-described push button 18 and the hole 23 forming the receiving portion.

The cylindrical body 13 is mounted so as to be sandwiched between an inner cylinder 42 arranged inside the rear half of the outer cylinder 15, thereby maintaining the straightness of the cylindrical body 13. In this state, the cylindrical body 13 is movable along the axial direction. Further, a coil spring 44 is disposed between the tip of the tubular body 13 and the front step portion 36, and the tubular body 13 always projects from the rear end of the writing instrument body 12 with the coil spring 44. Is to be energized.

In the above configuration, when the writing instrument 10 has the shortest dimension, a pushing force may be applied to the end of the cap 35 of the tubular body 13 from the axial direction.
The pushing force may be released at a position where the finger has entered the hole 23 constituting the receiving portion. At this time, the stopper piece 41 is
3 can be confirmed by the sound of "snap".

On the other hand, when the writing instrument 10 is used with the maximum size, the push button 18 may be pushed in, and the stopper piece 41 may be dropped from the hole 23 by the inner end surface of the push button 18. When the stopper piece 41 falls off in this manner, the cylindrical body 13 is urged by the coil spring 44, and the urging force causes the cylindrical body 13 to immediately move in a direction to protrude from the rear end of the outer cylinder 15. That is, the rear end face of the thick part 32 is
The stop position is set at the position where the contact position 7 is reached.

Therefore, according to such an embodiment, an effect is obtained that the length of the writing instrument 10 can be changed according to the usage mode of the writing instrument 10.

In the above-described embodiment, the case where the present invention is applied to the side knock type dispensing writing instrument has been illustrated and described. However, the present invention is not limited to this, and the present invention is not limited to this. It can also be applied to writing instruments.

[0026]

As described above, according to the present invention,
Since the tubular body is inserted inside the rear end of the writing instrument main body and the tubular body is configured to be movable along the axial direction,
While adopting the configuration in which the length is changed, it is possible to set the outer diameter dimension that is easy to grasp on the writing instrument main body without being restricted by the outer diameter of the writing instrument main body. In addition, since there is no step with the cylindrical body in the region where the finger can be hung at the time of writing, good writing workability can be ensured even when using the shortest dimension.

Further, a spring is provided between the tip of the cylindrical body and the writing instrument main body to urge the cylindrical body in a direction protruding from the rear end of the writing instrument main body. Work can be performed very quickly.

Further, in the configuration in which the stopper mechanism is provided between the writing instrument main body and the cylindrical body, the cylindrical body is pushed into the writing instrument main body to keep the writing instrument in the shortest dimension. Suitability as accessories such as notebooks can be provided.

The stopper mechanism includes a stopper piece provided at an inner end of the moving member, a receiving portion formed on the writing instrument main body, and a push button which can be pressed toward the receiving portion. Therefore, by pressing the push button, the operation when changing from the shortest dimension to the maximum dimension can be performed with one touch, and the tubular body is brought into the state of the shortest dimension only by being pushed into the writing instrument main body. It is also possible to set and hold the state.

Further, since the tubular body is inserted inside the writing implement main body, it is possible to provide a knocking portion in a so-called side knock type writing implement on the writing implement main body side.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment in which the present invention is applied to a side knock type dispensing writing instrument.

FIG. 2 is a front view showing a state where the writing instrument is set to a longest dimension.

FIG. 3 is a partially enlarged sectional view taken along line AA of FIG. 1;

FIG. 4 is a partially enlarged sectional view taken along line BB of FIG. 2;

FIG. 5 is an enlarged schematic perspective view showing a distal end side of a tubular body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Writing implement 11 Core (writing member) 12 Writing implement main body 13 Cylindrical body (moving member) 15 Outer cylinder 18 Push button (stopper mechanism) 23 Hole as receiving part (stopper mechanism) 41 Stopper piece (stopper mechanism) 44 Coil spring

Claims (5)

[Claims] 1. A writing implement comprising: a cylindrical writing implement main body from which a writing member protrudes at a front end side; and a moving member provided so as not to fall off at a rear end side of the writing implement main body, wherein the moving member comprises: It is constituted by a cylindrical body inserted inside the writing instrument main body and provided so as to be movable in the axial direction, and when the cylindrical body is pushed into the writing member side, it has the shortest dimension, and escapes from the writing instrument main body. A writing instrument characterized in that it has the longest dimension when the movement limit in the direction is reached. 2. A spring is provided between the distal end of the cylindrical body and the writing instrument main body, and the urging force of the spring urges the cylindrical body in a direction protruding from the rear end of the writing instrument main body. The writing implement according to claim 1, wherein 3. A stopper mechanism is provided between the writing instrument main body and the tubular body when the tubular body is at the shortest dimension position, the stopper mechanism holding the position. Item 3. The writing implement according to item 1 or 2. 4. The stopper mechanism is provided at an inner end of the tubular body and is always directed outward in the radial direction of the tubular body. The stopper mechanism is formed on the writing instrument main body. And a push button provided on the writing instrument main body and capable of being pressed from the outside toward the receiving portion, and the stopper piece can be pushed out of the receiving portion by pressing the push button. 4. The writing implement according to claim 3, wherein the writing implement is provided. 5. A writing mechanism is provided in the writing instrument main body, while a knocking portion is provided on an outer peripheral portion of the writing instrument main body, and a side knocking mechanism is provided for operating the core feeding mechanism by pressing the knocking portion. The writing implement according to any one of claims 1 to 4, wherein