JPH047997Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] In the present invention, when writing, the tip of the cursive pen protrudes from the tip opening of the barrel, and the length of the shaft is extended as a whole, improving usability. The present invention also relates to an extensible writing instrument that is convenient to carry because the tip of the cursive writing pen is retracted into the barrel when not being used for writing, and the shaft length is reduced as a whole.

[Conventional technology]

Conventional examples of writing implements with the function of expanding and contracting the shaft length include the retractable ballpoint pen presented in Japanese Patent Application Laid-open Publication No. 199699/1984, or the retractable ballpoint pen published in Publication No.
Ballpoint pens, etc. mentioned in the issue bulletin exist. However, the former type of retractable ballpoint pen has a built-in magnet to fix the shaft length in a shortened state, so there are disadvantages such as having a negative effect on magnetic cards when stored in a pocket or bag. The ballpoint pen used a swinging cam to extend and retract the shaft length, so it had drawbacks such as not being able to provide a sufficient extension and retraction stroke.

[Problem that the invention attempts to solve]

The present invention does not have the drawbacks of the conventional example mentioned above, and can expand and contract the length of the shaft, and the expansion and contraction does not impair usability and appearance.Furthermore, the pen tip of the cursive writing pen protrudes from the opening at the tip of the shaft cylinder, making it possible to expand and contract the length of the shaft. To provide an extensible writing instrument with a novel structure capable of preventing staining of clothing or the like by the tip of the brush by making the clip unusable so that it cannot be attached to clothes or the like.

[Means for Solving the Problems] The telescopic writing implement of the present application devised to achieve the above object includes a cap to which a clip is fixed and a hole for inserting the bead at the position of the bead of the clip. attached to the shaft cylinder so as to be movable in the axial direction, either on the cap itself or on an inner cylinder fixed to the cap, or on a lead cylinder mounted on the shaft cylinder so as to be rotatable in the circumferential direction but not movable in the axial direction. A first diagonal groove is provided, a first protrusion that is movably fitted into the first diagonal groove is provided on the lead cylinder, the cap itself, or an inner cylinder fixed to the cap, and an axis line is provided in the shaft cylinder. A second diagonal groove is provided in either the slider or the reed tube which is fixed to the writing body stored so as to be movable in the direction and not rotatable in the circumferential direction; A second protrusion that fits into the lead tube or slider is provided so that the tip of the cursive writing pen sinks into the barrel as the cap moves forward relative to the barrel, and the tip of the cursive writing pen sinks into the barrel as the cap moves back relative to the barrel. The tip of the brush protrudes from the tip of the barrel, and the ball of the clip of the cap is almost completely recessed into the hole of the cap.

〔Example〕

An embodiment of the present invention will be described based on the drawings. First, the barrel consists of a barrel main body 1 and a tip barrel 2 screwed onto the tip of the barrel, and a refill 3 of a ballpoint pen serving as a writing body is housed inside the barrel so as to be movable in the axial direction. The rear end of the reel 3 is inserted into a reel holder 4, and the reel holder 4 is fixed to a slider 5. A fixing ring A6 and a fixing ring B7 are fixed to the inner surface of the rear end of the shaft cylinder main body 1 with a slight distance between them, and the front end flange 8a of the lead cylinder 8 is fitted between them, so that the lead cylinder 8 can freely rotate in the circumferential direction. It is mounted so that it cannot move in the axial direction. The slider 5 is connected to this lead tube 8.
It is fitted into the inner surface of the shaft so as to be able to swing freely in both the axial direction and the circumferential direction. A cap 9 is attached to the outer surface of the rear end of the barrel body 1 so as to be movable in the axial direction. A decorative ring 10 is fixed to the opening edge of the cap 9 at the front end, and a crown 11 is fixed to the rear end, and a clip 12 is attached to the crown 11. The clip 12 has a ball portion 12a at its tip, and a hole 9a into which the ball portion 12a can be inserted is provided at the position of the ball portion 12a in the cap 9.
The ball portion 12a is biased by the spring force of the clip 12 in the direction of sinking into the hole 9a. A guide rod 13 is also fixed to the crown 11 of the cap 9. The guide groove 13 maintains its axial orientation inside the cap 9, and is fitted into the center hole 14 of the slider 5 so as to be freely slidable in the axial direction. Both the center hole 14 and the guide rod 13 of the slider 5 have polygonal cross sections, and as a result, the slider 5 cannot rotate in the circumferential direction. A cap inner tube 15 is press-fitted into the inner surface of the cap 9, and the lead tube 8 is fitted into the inner surface of the cap inner tube 15. A first diagonal groove 16 having components in the axial direction and the circumferential direction is formed on the outer surface of the lead tube 8, and a first diagonal groove 16 is formed on the inner surface of the cap inner tube 15 to fit into the first diagonal groove 16. A first protrusion 17 that is movable is provided. Further, the lead tube 8 has a second diagonal groove 18 in the opposite direction to the first diagonal groove 16.
A second protrusion 19 is provided on the outer surface of the slider 5 and is movable by fitting into the second oblique groove 18. The spring 2 stretched between the inner step of the tip shaft 2 and the outer step of the front end of the reel 3
0 is for absorbing the dimensional error in the axial direction of the shaft cylinder and the refiel 3 to prevent the refiel 3 from rattling.The force pressing the refiel 3 is weak, and the refiel 3 and the slider 5 are moved backward to prevent the refiel 3 from rattling. There is no force to move the second protrusion 19 within the second oblique groove 18 of the lead tube 8. As shown in FIG. 3, the first oblique groove 16 and the second oblique groove 18 of the lead tube 8 are arranged at a distance in the circumferential direction between both end positions (A in the figure).
and the value of B) are set equal, and the second diagonal groove 1
The distance in the axial direction between the two end positions of 8 (the value of C in the figure) is from the position where the brush tip 3a of the re-feel 3 protrudes from the tip opening 2a of the tip shaft 2 to the position where it completely sinks into the interior of the tip shaft 2. is set equal to the stroke of The position of the first protrusion 17 of the cap inner cylinder 15 and the position of the second protrusion 19 of the slider 5 are set in the following relationship. That is, when the first protrusion 17 is located at the rearmost end of the first diagonal groove 16, the second protrusion 19 is located at the frontmost end of the second diagonal groove 18 (see FIG. 3), and the first protrusion 17 is the first diagonal groove 16
The second protrusion 19 is positioned at the rearmost end of the second diagonal groove 18 (see FIG. 4). When the cap 9 is retracted from the shaft cylinder body 1 so that the first protrusion 17 is located at the rearmost end of the first oblique groove 16, the hole 9 of the cap 9
The dimensions are set so that a is located on the outer surface of the lead tube 8, and both front and rear end surfaces are inclined on the outer surface of the lead tube 8 facing the hole 9a of the cap 9, and the tip of the ball portion 12a of the clip is inserted into the outer surface of the lead tube 8. A recess 8b is provided to allow the The depth of the recess 8b is set to such a depth that the ball portion 12a of the clip can completely sink into the inside of the cap. Further, when the cap 9 moves forward with respect to the barrel body 1 so that the first protrusion 17 is located at the frontmost end of the first oblique groove 16, the hole 9a of the cap
is dimensioned so as to be located on the outer surface of the shaft cylinder body 1.

In the above embodiment, the lead tube 8 is provided with the first oblique groove 16 and the second oblique groove 18, the cap inner tube 15 is provided with the first protrusion 17, and the slider 5 is provided with the second protrusion 19. However, the first diagonal groove is provided on the inner cylinder of the cap, the first protrusion is provided on the reed cylinder, the second diagonal groove is provided on the reed cylinder, and the second protrusion is provided on the slider. The first protrusion is provided on the inner cylinder of the cap, the first protrusion is provided on the reed cylinder, the second diagonal groove is provided on the slider, and the second protrusion is provided on the reed cylinder. It is also possible to provide an embodiment in which a second diagonal groove is provided on the inner cylinder of the cap, a second oblique groove is provided on the slider, and a second protrusion is provided on the lead cylinder.

[Effect]

The operation will be explained based on the above-illustrated embodiment. First, when the first projection 17 is located at the rearmost end of the first diagonal groove 16 and the second projection 19 is located at the frontmost end of the second diagonal groove 18 as shown in FIG. 9 is at the retracting limit position with respect to the barrel main body 1 and has the longest shaft length, and the tip portion 3 of the refill 3
A is in a state protruding from the tip opening 2a of the tip shaft 2 (see FIG. 1), and writing is performed in this state. At this time, the ball portion 12a of the clip fits into the recess 8b of the lead tube 8 and is completely immersed inside the cap. Therefore, in this state, clip 1
2 cannot be used, and it prevents clothing from attaching to pockets or the like. When not writing, when the cap 9 is pressed forward against the barrel body 1, the first protrusion 17 of the cap inner cylinder 15 presses the slope of the first diagonal groove 16 of the lead cylinder 8, and the lead cylinder 8 is As it rotates, the second oblique groove 18 of the reed cylinder 8 moves the second protrusion 19 of the slider 5 back, and finally, as shown in FIG. The second protrusion 19 moves to the rearmost end of the second diagonal groove 18,
The axial length is shortened by the distance in the axial direction of the first oblique groove 16 (the value of D in FIG. 3), and the tip portion 3a of the refill 3 is recessed into the interior of the tip shaft 2 (see FIG. 2). In this state, the ball portion 12a of the clip comes into contact with the outer surface of the shaft body 1, but the shaft body 1 and the cap 9
Since the difference in the outer diameter of the clip is set small, the ball part 12a of the clip can be easily pulled out onto the outer surface of the cap, and the clip 12 can be used again. If the reel 3 is pulled rearward, the shaft length will be extended as shown in FIGS. 1 and 3, and the tip a of the refill 3 will protrude from the tip end opening 2a of the reel 3.

[Effect of idea]

The present invention has the above-described structure and function, and eliminates the drawbacks of the conventional example described above.In addition, the relative position of the clip does not change even when the axial length is expanded or contracted, so the appearance is also improved. There is no disadvantage such as the clip getting in the way when writing and impairing usability, and the expansion and contraction of the shaft length provides convenience for writing and portability, respectively. In addition, when the shaft length is extended, that is, when the tip of the brush protrudes from the tip of the barrel, the clip cannot be used, so it cannot be inserted into a pocket of clothing, thereby preventing staining of clothing with ink from the tip of the brush. effective. It should be noted that if a recess into which the ball of the clip fits in the longest shaft length state is provided as in the embodiment, it is extremely convenient because the user can sense the longest state by feeling the writing instrument without looking at it. Further, the extension/contraction stroke of the axial length and the protrusion/retraction stroke of the writing body can be arbitrarily set by changing the axial length of the oblique groove and the position of the protrusion, which also has a design advantage.

[Brief explanation of drawings]

The figures show one embodiment of the present invention. Figure 1 is a longitudinal cross-sectional view with the axial length extended, Figure 2 is a longitudinal sectional view with the axial length shortened, and Figure 3 is a longitudinal sectional view with the axial length shortened. FIG. 4 is a developed plan view of the reed tube showing the position of the protrusion in the diagonal groove when the axial length is the shortest. FIG. 1... Barrel body, 2... Tip barrel, 2a... Tip opening, 3... Refill, 3a... Brush tip, 4...
Re-reel holder, 5...Slider, 6...
Fixing ring A, 7... Fixing ring B, 8... Lead tube, 8a... Flange, 8b... Recess, 9... Cap, 9a... Hole, 10... Decorative ring, 11...
...Crest, 12...Clip, 12a...Tamabe, 1
3...Guide rod, 14...Slider center hole,
15... Cap inner cylinder, 16... First diagonal groove, 1
7...First protrusion, 18...Second diagonal groove, 19...
...Second protrusion, 20...Spring.

Claims (1)

[Scope of utility model registration request] A clip is fixed to the clip, and a cap having a hole for inserting the ball at the position of the ball of the clip is attached to the shaft cylinder so as to be movable in the axial direction, and the cap itself, an inner cylinder fixed to the cap, or the shaft cylinder A first diagonal groove is provided in one of the lead tubes which are mounted so as to be rotatable in the circumferential direction and immovable in the axial direction, and a first diagonal groove is movably fitted into the first diagonal groove.
A slider or A second diagonal groove is provided in one of the lead tubes, and a second protrusion that is movably fitted into the second diagonal groove is provided on the lead tube or the slider so as to move in conjunction with the advancement of the cap relative to the shaft tube. The tip of the cursive pen sinks into the barrel, and as the cap retreats from the barrel, the tip of the cursive protrudes from the tip of the barrel, and the ball of the clip of the cap almost enters the hole of the cap. A retractable writing instrument characterized by its immersive structure.