JP2002215313A - Input pen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an input pen with a ball-point pen refill equipped at a low cost, having few number of parts. SOLUTION: In this input pen, used in a portable information terminal by mounting an input tip 2 on its front part, the ball-point pen refill 4 is mounted detachably on a rear part of a shaft cylinder 5. An opened window 5A is formed on a side face of the shaft cylinder 5. A thin rod is inserted from the opened window 5A, whereby the ball-point pen refill 4 is pushed out, and detached.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input pen used for a portable information terminal, in other words, a PDA (Personal Digital Assistant).

[0002]

2. Description of the Related Art In a conventional input pen used for a portable information terminal, a ball-point pen refill is built in a barrel for writing a memo together with an input operation.

[0003]

However, there is a problem that the number of parts is increased in order to hold the ballpoint pen refill or replace the ballpoint pen refill, resulting in a very high cost.

[0004] It is an object of the present invention to provide an input pen that solves the above problems.

[0005]

According to a first aspect of the present invention, there is provided an input pen used in a portable information terminal by providing an input chip at a front portion thereof.
A ball-point pen refill is detachably attached to the rear part of the barrel, and an opening window is formed on the side surface of the barrel, a thin rod is inserted from the opening window to push out the ball-point refill, and the ball-point refill is removed. .

According to a second aspect of the present invention, in an input pen used for a portable information terminal by providing an input chip at a front portion, a ballpoint pen refill is detachably mounted at a rear portion of a shaft cylinder, and the input tip of the shaft cylinder is provided. Provide a plate on the side,
An opening window is formed in the plate, a thin rod is inserted through the opening window, the ballpoint pen refill is extruded, and the ballpoint pen refill is removed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An input pen according to the present invention will be described below with reference to the drawings. FIGS. 1, 2, 3 and 4 show a first embodiment of the present invention. In addition, let the left side of FIG. 1 be front, and let the right side be back. In addition, the upper side of FIG. 1 is the front side, and the lower side is the back side. A front end hole 1A is formed at the front end of the shaft cylinder 1 made of synthetic resin and formed in a flat shape, and a front large diameter hole 1B communicating with the front end hole 1A is formed. Further, a rear end hole 1C is formed at the rear end of the barrel 1, and a rear large diameter hole 1D communicating with the rear end hole 1C is formed. The rear large-diameter hole 1D and the front large-diameter hole 1
An inner collar 1E is formed between B. In addition, a notch 1F is formed on the surface of the side surface of the shaft cylinder 1, and the front large-diameter hole 1B, the inner flange 1E, and the rear large-diameter hole 1D are formed by opening the surface.

A synthetic resin input chip 2 made of polyacetal or the like is inserted through the front large-diameter hole 1B of the barrel 1 so that the tip 2A of the input chip 2 projects from the tip hole 1A of the barrel 1. The input chip 2 is built in the shaft cylinder 1 so as to be slidable in the longitudinal direction, and is usually a coil spring 3 stretched between an outer flange 2B of the input chip 2 and an inner flange 1E of the shaft cylinder 1.
Is urged forward in the longitudinal direction. Further, a ballpoint pen refill 4 is inserted through a rear end hole 1C of the barrel 1 and a proper portion is formed by a projection 1G formed at a rear portion of the ballpoint refill 4 on both sides of a front portion of the rear large diameter hole 1D of the barrel 1. It is held by frictional force. The writing portion 4A of the ballpoint pen refill 4 is configured to protrude from the rear end of the barrel 1.

Next, an alumite-treated aluminum plate 5 is fixed to the notch 1F of the barrel 1 by bonding. Although not shown, the plate may be press-fitted and fixed to the barrel, or may be fitted and fixed in a groove formed in the barrel. The plate 5 is formed with a boring pin-shaped opening window 5A, and the rear portion of the ballpoint pen refill 4 is exposed from the opening window 5A. Further, an elliptical recess 1H is formed on the back surface of the barrel 1 facing the opening window 5A of the plate 5, and the opening window 5A of the plate 5 is formed.
The input pen is stored in the portable information terminal in a state in which the concave portion 1H of the barrel 1 is fitted into the projection of the portable information terminal.

Further, a cap 6 is fitted to the rear portion of the barrel 1, and a projection formed on the inner surface of the cap 6 is fitted into an engaging recess (not shown) formed on the outer surface of the rear portion of the barrel 1. The cap 6 allows the ballpoint pen feel 4
4A is covered. A rubber rear input chip 7 is provided on the top of the cap 6. The rear input chip 7 is configured to be softer than the input chip 2 and the rear input chip 7 is
The tip 7A has a larger radius of curvature than the tip 2A of the input chip 2.

The above-mentioned input pen is used for pressure-sensitive input to a panel provided in a portable information terminal. When inputting fine characters and the like, an input tip provided at the front portion of the barrel 1 is used. By using 2, a precise input can be performed. When a pointing input is performed, the input can be easily performed by using the soft rear input chip 7. In addition, two types of input operations can be performed only by inverting the input pen, which is very convenient.

Further, when an excessive force is applied to the input chip 2, the input chip 2 is retracted to prevent the panel from being damaged.

Furthermore, if the cap 6 is removed, writing with the ballpoint pen refill 4 becomes possible, so that it is possible to check and make notes. Moreover, the cap 6
As shown in FIG. 5, the cap 6 can also be fitted to the front part of the barrel 1, so that there is no danger of the cap 6 being lost while writing with the ballpoint pen refill 4.

When replacing the ballpoint pen refill 4, first insert the tip of a thin metal rod through the opening window 5 A of the plate 5, and use the thin rod to refill the ballpoint pen refill 4.
Press the rear end of Then, the ballpoint pen refill 4 moves rearward, disengages from the projection 1G of the barrel 1, and is discharged from the rear end hole 1C of the barrel 1.

Next, by inserting a new ballpoint pen refill 4 from the rear end hole 1C of the barrel 1 and holding the rear portion of the ballpoint refill 4 by the projection 1G of the barrel 1, the ballpoint refill 4 is mounted in the barrel 1. Is done.

FIGS. 6 and 7 show a second embodiment of the present invention. The same members as those in FIG. 1 are denoted by the same reference numerals and description thereof will be omitted. A front hole 11I is formed from the front end of the barrel 11, and a rear hole 11J is formed from the rear end of the barrel 11. Further, an inner flange 11E is formed between the front hole 11I and the rear hole 11J of the shaft cylinder 11. Further, although not shown,
The portion of the rear hole 11J that is connected to the inner flange 11E is slightly narrowed to form a holding portion. A locking window 11K is formed on the front side surface of the shaft cylinder 11 so as to face the locking tube 11K, and the locking window 11K communicates with the front hole 11I. Further, the shaft cylinder 11
A hole 11L in the form of a boring pin is formed in the front surface of the shaft 11 and communicates with the inner flange 11E of the barrel 11 and the rear hole 11J. Further, an elliptical concave portion 11H is formed on the rear surface of the barrel 11 so as to face the opening window 11L. The input chip 12 has a protrusion 12C facing the side.
Is formed, and the rear portion of the projection 12C is formed to be inclined. Further, a cut groove 12D is formed in an intermediate portion of the input chip 12, and a portion having the protrusion 12C is configured to be flexible.

When the input chip 12 is mounted on the barrel 11, the coil spring 3 is first inserted into the front hole 11I of the barrel 11, and then the front hole 11I of the barrel 11 is inserted.
Of the input chip 12 is inserted. At this time, the input chip 12
The portion having the protrusion 12C is inserted by being flexed appropriately. Then, the projection 12C of the input chip 12 is engaged with the locking window 11K of the barrel 11, and the input chip 12 is inserted into the barrel 11 so as to be slidable in the longitudinal direction as appropriate. This input chip 12
Is normally urged forward by the coil spring 3 in the longitudinal direction. Further, a ballpoint pen refill 4 is inserted into the rear hole 11J of the barrel 11 and the ballpoint pen refill 4 is inserted.
The rear portion is held with a suitable frictional force with the holding portion formed in the rear hole 11J. Further, a cap 1 is provided at the rear of the barrel 11.
6 are fitted.

The present invention is not limited to the above-described embodiment. For example, the input chip may be fixed to the shaft cylinder by press fitting or the like. Further, the shaft cylinder can be integrated by press-fitting or bonding two or more parts.

[0019]

As described above in detail, according to the present invention, an input pen provided with a ball-point pen refill has the effect of reducing the number of parts and providing it at low cost.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of an input pen according to the present invention.

FIG. 2 is a plan view showing a first embodiment of the input pen of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is a sectional view taken along line BB of FIG. 1;

FIG. 5 is a cross-sectional view showing a writing state using a ballpoint pen feeler in the first embodiment of the input pen of the present invention.

FIG. 6 is a sectional view showing a second embodiment of the input pen according to the present invention.

FIG. 7 is a sectional view taken along the line AA of FIG. 6;

[Explanation of symbols]

 1 Shaft tube 2 Input pen 4 Ballpoint pen feel 4A Writing part of ballpoint pen feel 4 5 Plate 6 Cap 7 Rear input chip 11 Shaft tube 12 Input chip

Claims (3)

[Claims] 1. An input pen used for a portable information terminal by providing an input chip at a front portion, wherein a ballpoint pen refill is detachably attached to a rear portion of a barrel, and an opening window is formed on a side surface of the barrel. An input pen characterized by inserting a thin rod through the opening window to push out the ballpoint pen refill and remove the ballpoint pen refill. 2. An input pen used in a portable information terminal having an input chip provided at a front portion thereof, wherein a ballpoint pen refill is detachably mounted at a rear portion of the barrel, and a plate is provided on a side surface of the barrel. An input pen, wherein an opening window is formed in the opening pen, a thin rod is inserted through the opening window to push out a ballpoint pen refill, and the ballpoint pen refill is removed. 3. A writing portion of a ballpoint pen refill is projected from a rear end of the barrel, a cap covering the writing portion is fitted to a rear portion of the barrel, and a top portion of the cap is made of an elastic material such as rubber. 3. The input pen according to claim 1, further comprising an input tip.