JP2003154789A - Side slide type composite writing appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that since the diameter of a coil spring wound around a writing body is small and a comparatively long coil spring is used, during operation, bending of the spring occurs and operability is not good. SOLUTION: In the side slide type composite writing appliance consisting of shaft cylinders 1 and 2 where a guide window hole 22 is formed in a side wall; a plurality of writing bodies 3 slidingly situated in the shaft cylinder; an operation member 4 formed that the writing body is removably mounted on its tip and an operation part 41 is protruded through a guide window hole and slidingly situated in the shaft cylinder; a guide stopper 5 having a partition wall 51, in which a plurality of insertion holes 55 in which the writing bodies are respectively inserted, are formed in front of the operation member, and making contact with a lock part formed in the inner wall of the shaft cylinder for positioning; and a spring 6 situated between the guide stopper and a lock part 45 at the tip of the operation member and energizing rearward the operation member, the guide stopper is provided with a surrounding wall 53, surrounding the spring, and an extension shaft 54.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention selects one of a plurality of operating members projecting from a side wall of a barrel and slides it forward to alternately project a plurality of writing bodies from the tip of a writing instrument. The present invention relates to a side slide type composite writing instrument for writing.

[0002]

2. Description of the Related Art Conventionally, a side slide type composite writing instrument of this type has a plurality of writing bodies such as a ball-point pen refill filled with ink of different colors and / or a lead tank containing a writing lead. A coil spring is used for each operation member in order to slide the operation member connected to each writing body to slide the writing body back and forth.

By the way, as a composite writing instrument having a plurality of ballpoint pen refills and / or core tanks, etc., since there are a plurality of writing instruments to be accommodated, a writing instrument having a single barrel having a diameter of one can be compared to a writing instrument. Due to its structure, its diameter must be increased. However, even with a compound writing instrument, the size of the diameter of the barrel is limited in consideration of the size of the user's hand and writing conditions such as writing pressure. Therefore, in order to reduce the diameter of the shaft cylinder, the coil spring wound around the outer circumference of each operating member must have a small wire diameter and a small coil diameter. Must be placed close together. On the other hand, the side-sliding writing instrument requires a sufficient length according to the stroke of the writing body. As a result, it is required as a design condition that the coil spring used for operating the writing body of the side slide type composite writing instrument has a small diameter and a relatively long diameter.

[0004]

However, from the viewpoint of the characteristics of the coil spring, such a thin wire diameter, a small coil diameter, and a relatively long overall length ensures that the load is accurate in the axial direction when the spring is compressed. It is not added to, and thus escapes to the side. As a result, the bending of the spring, a so-called "stagnation" or "sagging" phenomenon occurs. In such a state, there is a disadvantage that a new one cannot be inserted when the cursive is exchanged.

Therefore, the present invention solves the above-mentioned drawbacks of the prior art, and is constructed so that the spring can be reliably operated by preventing the spring from being deflected from the axial direction when the side slide operation is performed. At the same time, it is an object of the present invention to provide a side-slide type composite writing instrument in which a spring is fixed at a correct position even when a new writing body is attached, so that the writing body can be easily attached by press fitting.

[0006]

In order to achieve the above object, according to the present invention, a barrel having a plurality of guide window holes formed in the longitudinal direction of the rear side wall, and slidable in the barrel. A plurality of writing bodies provided on the operating body, the writing bodies being removably attached to the ends of the writing bodies, the operating portion protruding from the guide window hole, and the operating member being slidably provided in the barrel; A guide stopper which has a partition wall formed with a plurality of insertion holes through which the writing bodies are respectively inserted in front of the operation member, and which is formed on the inner wall of the shaft cylinder and abuts on the locking portion for positioning. In a side slide composite writing instrument, which is composed of a return spring that is provided between a guide stopper and the operating member and biases the operating member rearward, the guide stopper is a return spring. A surrounding wall surrounding the composed and a extension shaft extending from the partition wall in the center of the surrounding wall towards the rear.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. 1 to 4 show a side slide type composite writing instrument according to an embodiment of the present invention. In the figure, in this example, a composite writing instrument composed of three refills having three colors of red, blue or black ball-point pen ink is illustrated. That is, the shaft cylinder has a tapered front end and a front end 1 and a clip 21 having an opening formed at the tip thereof.
And a rear shaft 2 provided with. And the rear axle 2
The outer diameter is gradually increased from the rear end toward the front, and a locking portion 24 for positioning the guide stopper 5, which will be described later, is formed on the inner peripheral portion thereof.

These shafts can be removed from each other by a screwing structure of a male screw on the outer side of the rear portion of the front shaft 1 and a female screw on the inner side of the front portion of the rear shaft 2, so that a new cursive body can be replaced. It is possible. A step portion 11 is formed adjacent to the male screw of the front shaft 1 to position the tip of the rear shaft 2.

Further, a thin pipe-shaped refill 3 filled with inks of three different colors is housed in the barrel. A tip 31 is provided at the tip of each of these refills 3. Further, on the rear peripheral wall portion of the rear shaft 2, three operation members 4 are formed at equal intervals across the clip portion, and long and narrow guide window holes 22 which slide therein are formed in the longitudinal direction.

More specifically, this guide window hole 22
The front end edge of is formed to be gradually shallow and arcuate toward the front, while the rear end edge is formed to be straight so that the operation of the operation member 4 described later can be performed smoothly. further,
From both sides of the rear end of the guide window hole 22, a guide rail portion 23 (FIG. 5) having a length corresponding to the sliding stroke of the operating member 4 is provided to extend.

Further, these refills 3 are in the shape of a thin pipe and open at the rear end, and are press-fitted to the tip of a side operating member 4 in the shape of a thin rod as shown in FIG. It is installed. Each of the operating members 4 has a mountain-shaped operation convex portion 41 on the outer side of the rear portion, and a locking end surface 42 is formed on the inner rear end opposite to the operation convex portion 41. Has a trapezoidal front release protrusion 43a and a rear release protrusion 43b. Further, the operation member 4 is separated from the rear end thereof slightly forward, and sliding engagement ribs 44 are formed on both side walls. Therefore, when the operating member 4 slides in the guide window hole 22 of the rear shaft 2, these engaging ribs 44 extend from both sides into the guide window hole 22 of the rear shaft 2 described above.
Slide.

A tip locking portion 45 is formed in the vicinity of the tip on the same side as the engaging ribs 44, and an attachment portion to which the cursive body is attached by press fitting from the tip projection 45 to a step 46. 47 is extended toward the front. A retaining portion 48 is formed at the tip of the mounting portion 47.

The refill 3 and the operating member 4 are selectively slidable in the barrel through a guide stopper 5 as shown in FIGS. 7 to 9. The guide stopper 5 is provided with a front surrounding wall 52 and a rear surrounding wall 53 at the front and back with the partition wall 51 interposed therebetween.

On the other hand, the rear surrounding wall 53 has a function of suppressing the lateral movement of the return spring 6 wound between the operating member 4 and the partition wall 51, and preventing the bending. Further, the guide stopper 5 is provided with an extension shaft 54 extending rearward at the axial center thereof, and has a length long enough to prevent bending, which is deformation of the return spring. The rear surrounding wall 53 has a plurality of (4) long grooves 5 in the longitudinal direction.
6 is formed. The guide stopper 5 is the rear shaft 2.
It is positioned at a predetermined position by a positioning locking portion 24 provided on the inner wall.

Further, the partition wall 51 of the guide stopper 5
The four insertion holes 55 are formed so as to have general versatility in any of the composite writing instruments using up to four refills 3, and between the partition wall 51 and the tip locking portion 45 of the operation member 4. A return spring 6 made up of a coil spring having end turn portions is wound around the. Reference numeral 7 in the drawing is a grip cover attached to an outer grip portion of the front shaft 1.

The operation of the composite writing instrument according to the above embodiment will be described below. First, when any one of the refills 3 to be used is slid forward on the operating portion of the operating member 4, the selected refill 3 and operating member 4 are moved forward while the return spring 6 is compressed. That is, at the start of the sliding operation, the sliding engagement ribs 44 formed on both rear walls of the operation member 4 slide on the rail portion 23 that extends into the guide window hole 22.

However, since the rail portion 23 has a predetermined length which is a slide stroke during the forward movement of the operating member, when the rail portion 23 is moved forward by the distance, the rail portion 23 is disengaged from the front end of the rail portion 23 and at the same time, the force of the fingertip is inward. Will also join
The operation convex portion 41 sinks into the guide window hole 22. At this time,
Since the operation member 4 is biased rearward by the return spring 6, the locking end face 42 at the rear end is locked at the front ends of the rail portions 23, and the tip 31 of the refill 3 projects to be in a writing state. .

That is, when the operating member 4 is advanced and the tip 31 is projected from the tip opening of the barrel, the locking end surface 42 of the operating member 4 is locked by the rail portion 23 of the rear shaft 2 which acts as a locking means. It is locked and stopped at that position, and writing is possible in this state.

Incidentally, in order to store the projecting refill 3 in the barrel after finishing writing, the other operating member 4 which has not been selected is slid and moved forward, and the operating member 4 is moved forward during the forward movement. The formed front release protrusion 43a is
The locking end surface 42 is unlocked from the front end surface of the rail portion 23 by coming into contact with the other rear release projection 43b of the operating member 4 that is locked and pushing upward. As a result, the locked operation member 4 is biased by the return spring 6 and retracts rearward along with the refill 3 to return to the initial position, so that the tip 31 is also housed in the front shaft 1.

After that, when the newly operated operating member 4 is further slid and moved forward to the front end of the rail portion 23 which is the locking position, this operating member is in turn pushed by the inward pressing force of the fingertip. 4 itself disengages from the rail portion 23 and descends inwardly, and the rear end biasing force of the return spring 6 locks the locking end surface 42 to the front end surface of the rail portion 23, and the tip 31 of the locking end surface 31 of the front shaft 1 moves. Writing is possible with the tip protruding and fixed from the opening. Hereafter, other refills 3 can be selectively used by projecting the tip 31 by the same operation.

The series of back and forth movements of the operating member 4 is performed by a return spring 6 which is a coil-shaped spring acting as a compression spring. By the way, in this case, although the diameter of the return spring 6 is very small, for example, the length of the refill 3 is 88 mm.
Then, if the length of the operating member 4 is 38.4 mm, the effective stroke is 14.6 mm, and a length of 16.45 mm is required to reach the switching stroke. Moreover, the free length of the return spring 6 used is at least 2
8.1 mm is required.

As a result, when the coil spring 6 having a small wire diameter, a small coil diameter, and a long overall length is compressed, the return spring 6 is laterally deformed if the load deviates from the axial direction for some reason. There is a risk that it will not work properly as a spring. However, since the front part of the return spring 6 is surrounded by the rear surrounding wall 53 provided on the guide stopper 5 and the extension shaft 54 extending rearward beyond the height of the rear surrounding wall 53, the side portion is There is an advantage in that the deformation of the compression spring is prevented and the compression spring works effectively.

Further, when the ink in the refill 3 is exhausted, the front shaft 1 is rotated to release the screw engagement with the rear shaft 2 and removed to expose the front part of the refill 3 to expose the operating member 4. It can be easily attached by pulling it out from the attaching portion 41 and inserting a new refill 3 into the attaching portion 47 of the operating member 4 via the guide stopper 5 and the return spring 6 instead.

Also in this case, the new refill 3 is inserted into the operating member 4 via the return spring 6. Therefore, if the inserting direction of the refill 3 is deviated even a little, the refill 3 may come into contact with the tip of the return spring 6 to deform the return spring 6 laterally and the insertion may not be successful. However, since the return spring is prevented from bending in its position and in its entirety by the rear surrounding wall 53 and the extension shaft 54 of the guide stopper 5, there is an advantage that the operation member 4 can be easily inserted into the mounting portion 47.

In the above-described embodiment of the present invention, the cursive body is filled with three different kinds of ink.
Although the composite writing instrument consisting of the ballpoint pen refill 3 of the book has been described, the writing pen may be a lead pencil tank other than the ballpoint pen refill 3 or a stylus tip inserted at the tip of the pipe. Needless to say, the number of is not limited to three as described above. In the case where the cursive body is a lead tank of a mechanical pencil, a lead-out mechanism such as a lead-out chuck is required as a lead-out mechanism, and a clip 21 may be used as an operation means for the lead-out. .

[0026]

Since the present invention is constructed as described above, there is an effect that the spring is prevented from bending during the side slide operation and the spring operates reliably.

Further, according to the present invention, even when a new cursive body is mounted, the spring can be fixed at a correct position so that the cursive body can be mounted extremely easily.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a side slide type composite writing instrument according to Embodiment 1 of the present invention.

FIG. 2 is a vertical cross-sectional view showing before and after operation of an operation member of a side slide type composite writing instrument.

FIG. 3 is a plan view of a side slide type composite writing instrument.

FIG. 4 is a front view of a side slide type composite writing instrument.

FIG. 5 is a front view of a rear shaft of a side slide type composite writing instrument.

FIG. 6 is a front view of an operating member of a side slide type composite writing instrument.

FIG. 7 is an enlarged plan view of a guide stopper of the side slide type composite writing instrument.

8 is a vertical cross-sectional view of the guide stopper of FIG.

9 is a bottom view of the guide stopper of FIG. 7. FIG.

[Explanation of symbols]

1 front axis 11 Step 2 rear axle 21 clips 22 Guide window hole 23 Rail 24 Locking part 3 Refill (cursive) 31 Tip 4 Slide operation member 41 Operation convex part 42 Locking end face 43a Front release protrusion 43b Rear release protrusion 44 Engaging rib 45 Tip locking part 46 steps 47 Attachment 48 retaining part 5 Guide stopper 51 partition wall 52 Front surrounding wall 53 Rear siege wall 54 Extension shaft 55 insertion hole 56 long groove 6 Return spring 7 Grip cover

Claims (4)

[Claims] 1. A shaft cylinder having a plurality of guide window holes formed in the longitudinal direction of a rear side wall, a plurality of writing bodies slidably provided in the shaft cylinder, and these writing bodies at the tip thereof. An operation member that is removably attached and has an operation portion that projects from the guide window hole and is slidably provided in the shaft cylinder; and a plurality of insertion holes through which the cursive body is inserted in front of these operation members. A guide stopper that has a partition wall formed and is formed on the inner wall of the shaft cylinder and is positioned in contact with the locking portion, and the operation member is provided at the rear between the guide stopper and the operation member. In a side slide type composite writing instrument composed of a biasing return spring, the guide stopper has a surrounding wall surrounding the return spring and a partition wall at the center of the surrounding wall toward the rear side. A side slide type composite writing instrument characterized by having an extended extension shaft. 2. The side slide composite writing instrument according to claim 1, wherein a writing body attachment portion extending from the tip of the operation member is provided, and a retaining portion is formed at the tip of the attachment portion. 3. A guide rail portion having a length corresponding to the sliding stroke of the operating member is projected from both sides of the rear end of the guide window so as to face each other, and is separated from the rear end of the operating member to the front side to both sides. The side-slide type composite writing instrument according to claim 1, wherein an engagement rib for sliding is formed on the wall. 4. The side-slide type composite writing instrument according to claim 1, wherein the extension shaft of the guide stopper projects rearward from the height of the surrounding wall.