JPH0337058Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is a switch for a coordinate input pen, which is provided in the input pen of a coordinate input device, and is turned on and off according to the pen pressure applied during input. This invention relates to a switch for a coordinate input pen that can be changed.

[Conventional technology]

Conventional coordinate input pens are equipped with a make-contact type switch that turns on according to the pen pressure applied during input, and the coordinate input device connected to this switch detects either the on or off state. By doing so, the presence or absence of pen input is detected. The head of the writing pen is held and housed in the case of the coordinate input pen, and the head of the writing pen receives a pressing force toward the pen tip from a pin-shaped plunger provided in the switch unit. ing. The switch unit has a structure in which the elastic force of a flexible spring made of metal or conductive rubber applies a pressing force to the writing pen and keeps the switch in the OFF state. When the pen pressure applied during input exceeds the pressing force of the plunger, the flexible spring is recessed in response to this, shorting the terminals of the switch and switching it to the on state.

[Problem that the invention attempts to solve]

The conventional coordinate input pen switch described above has a structure in which the switch unit is built into a case separate from the case of the input pen, and the switch unit is further housed in the case of the input pen. Due to the layered structure, the outer diameter of the input pen becomes thicker, and the stroke of the flexible spring becomes the stroke of the writing pen, so the stroke of the writing pen is too large, both of which make it difficult to use the input pen. There is a problem with the cause.

SUMMARY OF THE INVENTION An object of the present invention is to provide a coordinate input pen switch which solves the above-mentioned problems and allows the outer diameter of the input pen case to be made smaller than that of the prior art, and the stroke of the writing pen to be inputted to be made smaller.

[Means for solving problems]

A coordinate input switch according to the present invention has a spring for applying a pressing force to a writing pen, and a pair of contacts that switches the connection on and off according to the deformation of the spring caused by the writing pressure transmitted from the pen. In the pen switch, a stopper is provided which is connected to the pen and locks the pen in the storage case by the pressing force of the spring when there is no writing pressure, and which moves according to the deformation of the spring. A pin for switching the connection between the contact pair on and off, and a stroke adjustment means for varying the movement width of the pin depending on the presence or absence of pen pressure, and is directly incorporated into the housing case. .

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a side sectional view showing a first embodiment of the present invention. A metal nut 3 is attached to a chuck 4 for holding the head of a writing pen 10 within a case 1 of the input pen. A thread is provided at the tip of the metal pin 2 so that it can be screwed into a nut 3. The pin 2 passes through a guide hole provided in the case 1, and its head is connected to the wiring board 7.
It faces the electrode provided on the surface with a gap therebetween. A metal spring 5 is installed between the wiring board 6 and the nut 3 provided around the guide hole in the case 1. Electrodes provided on each surface of wiring boards 6 and 7 are connected to leads 8 and 9, respectively, and guided to the outside. Electrode and pin 2 on wiring board 6
are electrically connected via the spring 5 and the nut 3.

When no input is being made, the pen 10 is held in a position where it abuts a stopper (not shown) provided midway by the pressing force of the spring 5 acting in the direction of arrow A. At this time, there is a gap between the head of pin 2 and the electrode on wiring board 7, and leads 8 and 9 are in an off state. Also, when inputting, pen pressure is applied and pin 2 is pushed up in the direction of arrow B.
The head of the lead 8 contacts the electrode on the wiring board 7.
and 9 to turn on.

The stroke of the pen 10, that is, the width of the gap between the head of the pin 2 and the electrode on the wiring board 7 during non-input, can be changed by adjusting the tip of the pin 2 and the screwing of the nut 3. Therefore, a smaller stroke than before can be easily achieved. Further, since the switch unit is not housed in a separate case as in the conventional case, but is assembled directly into the case 1, the outer diameter of the case 1 can be made smaller than in the conventional case.

FIG. 2 is a side sectional view showing a second embodiment of the present invention. This embodiment is based on the wiring board 6 in the first embodiment.
and 7, and a wiring board 11 and a metal wiring board 12 are provided in their place. The spring 5 and the electrode plate 12 are connected to the wiring board 11 with respective conductors.
It is further connected to leads 8 and 9 and led to the outside.

The head of the pin 2 and the electrode plate 12 act as a switch contact, and the connection between the leads 8 and 9 is in an OFF state when no input is applied, and is switched to an ON state when an input is applied.
As in the case of the first embodiment, a smaller stroke than the conventional one can be easily obtained by screwing the pin 2 and the nut 3, and since the structure is directly assembled into the case 1, the outer diameter of the case 1 can be made smaller than the conventional one. It can be made thinner.

In this embodiment, since the wiring board 11 is not used for switch contacts, it is suitable for accommodating a circuit in an input pen.

FIG. 3 is a side sectional view showing a third embodiment of the present invention. This embodiment has a structure in which the connection between two contact electrodes provided on the surface of the wiring board 13 is switched on and off using a metal spring 5, similar to the conventional switch. What is different from the conventional switch is that it has a structure that can be assembled directly to case 1.
Two points are that the outer diameter is made thinner, and a washer 14 for stroke adjustment is installed between the tip of the chuck 4 and a protrusion provided as a stopper for the chuck 4 inside the case 1. . Stroke adjustment can be performed by changing the thickness of the washers 14 or by changing the number of washers installed.

[Effects of the Invention] As explained above, the present invention has the effect of realizing a switch for a coordinate input pen that allows the outer diameter of the case of the input pen to be made smaller and the stroke of the writing pen to be smaller than that of the conventional case.

[Brief explanation of the drawing]

1 to 3 are side sectional views showing embodiments of the present invention. 1...Case, 2...Pin, 3...Natsuto, 4
...Chuck, 5...Spring, 6,7,1
1, 13...Wiring board, 8, 9...Lead, 12...
...Electrode plate, 14...Watushia.

Claims (1)

[Claims for Utility Model Registration] (1) A spring for applying pressing force to a writing pen, and a pair of contacts that switch connection on and off in response to deformation of the spring caused by writing pressure transmitted from the pen. A coordinate input pen switch is provided with a stopper that is connected to the pen and locks the pen in the storage case by the pressing force of the spring when there is no writing pressure, and prevents deformation of the spring. and a stroke adjusting means for varying the movement width of the pin depending on the presence or absence of pen pressure, and is directly incorporated into the housing case. A switch for a coordinate input pen, characterized in that the switch is configured as follows. (2) The coordinate input pen switch according to claim 1, wherein the stroke adjusting means is a nut that engages with a screw provided on at least one of the pen and the pin at a connecting point thereof. (3) The coordinate input pen switch according to claim 1, wherein the stroke adjustment means is a washer that is replaceably interposed at a portion of the pin that is engaged with the accommodation case.