JPS627515Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a digitizer pen, such as a ballpoint pen, water-based ink pen, etc., that writes by sending out ink, etc. stored inside the pen core to the tip of the pen.

Conventionally, in this type of pen, the front or rear part of the pen body that holds the pen core has been removed, and the pen core has been taken in and out from there. Providing a removal mechanism such as a screw on the front or rear part makes the structure complicated, and it becomes a physical constraint to provide an additional mechanism in the pen body, such as a coil and switch as in the embodiment described later. The drawback was that it was easily damaged.

This invention eliminates the above-mentioned drawbacks and provides a digitizer pen that is inexpensive and suitable for providing additional features.

This invention will be explained below with reference to the embodiment shown in FIG.

In the drawings, reference numeral 1 denotes a pen body having a tapered cylindrical shape, and a sleeve 3 in which a coil 2 is wound coaxially with the pen is embedded and fixed in the tip of the pen body. A pen core guide hole 4 is provided at the tip of the sleeve 3, into which a ballpoint pen core 5 is inserted with a slight gap, and the pen tip protrudes from the pen body 1. A switch holder 7 that holds a pressure transmitting rod 6 slidably in the axial direction is fixed to the pen body main body 1' on the extended axis of the pen core guide hole 4. This switch holder holds a pressure sensitive element 9 at the rear. This pressure-sensitive element consists of a main body made of conductive rubber and Mylar 8 with a metal film pasted on the surface in contact with the main body. The pressure sensitive element holder 10 and the pressure transmitting rod 6 provided therein are configured to sandwich the pressure sensitive element. The pressure-sensitive element holder 10 has conductive lead terminals 11, 11 which are in contact with the pressure-sensitive element 9, and become conductive when the pressure-sensitive element 9 is pressed with a predetermined load or more. In other words, it constitutes a pressure sensitive switch.

A pen core holder 13 is fixed to the tip of the pressure transmitting rod 6, which has a pen holding hole 12 cut in a cross shape along the axis and having elasticity inside. The entrance of the hole 12 of this pen core holder 13 is formed with a chamfered portion 14 so that the pen core 5 can be easily inserted.
Further, the tip end surface of the pressure transmitting rod 6 forms the bottom of the pen holding hole 12 and acts as a stopper for the pen core 5. Reference numeral 15 denotes a compression spring loaded between the switch holder 7 and the pen nib holder 13, which urges the nib 5 forward and absorbs this spring force if the nib accidentally touches an object. This prevents the pressure-sensitive switch from operating. Note that the lead wire of the coil 2 is connected to the lead terminal 1 of the pressure-sensitive switch.
1 and is pulled out as a cable from the rear of the pen body 1, and the coil 2 is used to send and receive induction signals to and from the digitizer's tablet-side conductor, and the pressure-sensitive switch is used to output a reading signal based on the pressure of writing or checking with a ballpoint pen. be.

With this configuration, the pen core 5 made of a ballpoint pen or the like is guided into the pen core guide hole 4, and the rear end is elastically held by the pen core holder 13, so that the pen core 5 is attached to the pen body 1.
It is stored in.

When the pen core 5 runs out of ink and needs to be replaced, the pen core 5 can be pulled out against the elastic gripping force of the pen core holder 13 by pinching the tip protrusion and pulling it out. Next, by inserting a new pen core 5 and pushing it until the rear end comes into contact with the end surface of the pressure transmitting rod 6 press-fitted into the pen core holder 13, the state as shown in the drawing can be set again.

Therefore, since the pen core 5 can be replaced without separating the pen body 1 at all, the coil 2
Moreover, the coil 2 can be designed at the tip of the cylinder of the pen body without damaging electrical parts such as the pressure sensitive switch 9.

As mentioned above, according to this invention, the structure is simple,
It is possible to obtain a digitizer pen that is inexpensive, allows easy replacement of the pen core, and is suitable for incorporating additional mechanisms such as a coil and a switch.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing an embodiment of this invention. 1...Pen body, 2...Coil, 4...Ben lead guide hole, 5...Pen lead, 9...Pressure sensitive element, 12
...Pen holding hole, 13...Pen core holder.

Claims (1)

[Scope of utility model registration request] A pen body having a cylindrical shape as a whole and having a pen core guide hole at the tip of the barrel, a coil provided at the tip of the tube of the pen body so as to be coaxial with the pen core guide hole, and the pen core guide hole of the pen body. A pen core holder having a pen holding hole of approximately the same diameter as the guide hole provided at the back on the extension axis, and an interrupt along the outer peripheral axis provided at the tip of the pen holding hole and for guiding the pen core. an entrance chamfered portion; a pressure transmission rod inserted and fixed into the pen core holder;
a pen core whose rear end is inserted and supported in the pen holding hole of the pen core holder while abutting against one end of the pressure transmission rod, and whose tip end protrudes from the pen core guide hole of the pen body; A digitizer pen comprising a pressure sensitive switch provided at the other end of a pressure transmitting rod, and wherein the pen core is detachable and replaceable from the tip protrusion side.