JPS6028979Y2 - input pen - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an input pen, and particularly to an input pen used in a capacitive coupling type tablet input device.

A capacitive coupling type tablet input device, which is one of the information input devices, has a tablet on which a plurality of X electrode groups and Y electrode groups are arranged with an insulating base sandwiched between the X and Y electrodes.
This is a device that inputs positional coordinates or character information related to the contact area by sequentially applying scanning signals to the electrode group and detecting the scanning signals with an input pen that is in contact with the tablet.

Here, the detection of the scanning signal by the input pen is performed by capacitance coupling between the input pen and the tablet when the input pen is brought into contact with the tablet to which the scanning signal is applied.

That is, as shown in FIG. 1, a cylindrical detection rod (probe) A made of conductive material is attached to the tip of the input pen, and when this detection rod 1 is brought into contact with the tablet, In order to input the scanning signal related to the contact area via the detection rod A and perform a predetermined electrical process, the sensor is built into the detection pen or input device and electrically connected to the detection rod A. It is designed to be sent to a connected electrical circuit.

However, in the above-mentioned conventional technology, since the detection rod is formed of a metal material, the input pen as a whole only has the function of simply inputting information.
For example, when an operator wants to write a text on a manuscript, he or she has to replace the input pen with a writing instrument, which results in extremely poor operability and inconveniences in work efficiency.

The present invention was developed in view of the shortcomings of the prior art, and by forming the probe of the input pen from a conductive graphite core, etc., the present invention allows information input and writing to be performed without changing the hand of the input pen with a simple structure. It is an object of the present invention to provide an input pen that can be used for both functions and, therefore, has excellent operability and can improve work efficiency.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 5.

FIG. 2 is a sectional view showing a mechanical pencil type input pen according to the present invention.

In the figure, reference numeral 1 denotes a casing with a base plate 2 fixed therein, and a disc-shaped lock is provided at the tip and rear end of the casing 1 between the tip of the cap 3 and tail plug 4 and the -sing 1. A member 5 is fitted, and the board 2 is fixed by this locking member 5.

The cap 3 is formed of an insulating member, and is fixed and integrated with the casing 1 through a hollow relay 6.

On the other hand, inside the casing 1, a center shaft 7 extends from the inside of the relay 6 to the rear end.

This center shaft 7 has a conductive writing lead (hereinafter simply 1
It has a chuck device 9 for gripping the core 8), and a core case 11 is fixed to a stepped portion 10 bent at the rear end of the chuck device 9.

The right end surface and step portion 1 of the intermediate joint 6 in FIG.
A spring 12 is stretched between the center shaft 7 and the left side of the center shaft 7, and the center shaft 7 is constantly biased to the right by the action of the spring 12.

A rectangular opening 1 is provided at the gripping fingertip position of the casing 1.
3 (see Figure 3), and this opening 1
A receiver 14 is bored on the right side of the opening 1.
As shown in FIG. 5, the upper wall of the casing 1 near the casing 1 is slightly bent inward to form step portions 15, 15.

A knock lever 16 for pushing out the core 8 is fitted into the opening 13.

As shown in FIG. 4, the knock lever 16 includes a head 18 having a pressing surface 17 that fits into the opening 13 and a U-shaped cross section, and a base 19 supported by the receiver 14. The arm portion 20 has a spring action.

At the lower end of both side walls 21 of the head 18 (see FIG. 4),
A stepped portion 1 provided near the opening 13 of the casing 1
5 are formed with projecting pieces 22, 22 that can be freely locked.

Further, a bent piece 24, 24 is formed at the front end of the head 18 and comes into contact with a slider 23, which will be described later.

A slider 23 having an inverted U-shape in cross section is provided within the casing 1 and is engaged with the center shaft 7 .

This slider 23 has an inclined end surface 25 at the right end, and when the knock lever 16 is pressed downward, the bent piece 24.2
4 comes into contact with the inclined end surface 25, it slides forward while being positioned by the side wall of the casing 1 (see FIG. 5).

Since the left end surface 26 of the slider 23 is engaged with the stepped portion 10 of the center shaft 7, as the slider 23 slides, the entire center shaft 7 moves against the biasing force of the spring 12. It will be moved to the left.

At this time, as shown in FIG. 3, the core 8 is fed out by the action of the chuck device 9.

On the other hand, when the knock lever 16 is released after the core 8 is fed out as described above, the center shaft 7 is moved by the action of the spring 12.
When the slider 23 is returned, the inclined end surface 25 of the slider 23 rotates the knock lever 16 upward, thereby returning the knock lever 16 to its original position.

Also, at this time, the drawn-out core 8 is held in a chuck device 9
gripped by.

Here, in the case of a mechanical pencil lead for a writing instrument, the lead 8 is usually made of a conductive material (about several ohms to several 100 ohms) such as graphite or carbon, and therefore, the lead 8 is made of a conductive material such as graphite or carbon (about several ohms to several 100 ohms). When the core 8 comes into contact with a tablet (not shown), it is capacitively coupled to the tablet, and the scanning signal can be detected.

The signal input to the core 8 is sent via the chuck device 9 and the relay 6 to an amplifier 30 with high input impedance (about IMΩ) installed on the board 2, where it is amplified to a predetermined level. After that, cable 27
The data is sent to the tablet input device main body (not shown) via the tablet input device.

The rear end of the center shaft 7 has a through hole 2 formed in the locking member 5.
After being loosely inserted into the tail plug 8, it protrudes to the right from the tail plug 4, and a cap 29 is fitted to the end for inserting a refill and preventing the lead from becoming separated.

According to this embodiment, since it can be used as both a writing instrument and an input pen, it is particularly suitable for a graphic input device, and since it has a mechanical pencil type structure, it is easy to perform input operations, and the lead can be fed out and replaced easily. The core can also be inserted quickly.

In addition, since signal detection is performed by a core with relatively low resistance, the configuration for signal detection can be simplified.
On the other hand, signal attenuation due to the core can be largely ignored by using a signal processing circuit with high input impedance.

Furthermore, mechanical pencil leads have high precision, making it possible to always detect signals with stable and high resolution. , when inputting figures, there is no possibility that the ink will dry and the initial writing cannot be completed, resulting in incorrect input.

In the above embodiment, a case has been described in which a scanning signal from a tablet is detected by an input pen, but a type in which an AC signal is applied from an input pen may also be used.

Furthermore, it is also possible to attach a so-called pen switch by making the chuck device or the entire center shaft move by pressing the lead.

As described above, according to the present invention, since it is possible to perform both information input and writing, it is possible to provide an input pen with excellent operability and with which work efficiency can be improved.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing a conventional input pen, FIG. 2 is a sectional view showing an input pen according to the present invention, FIG. 3 is a partial sectional view showing the state when knocking, and FIG. FIG. 5 is a perspective view of the knock lever, which is a part of the knock lever, and FIG. 5 is a sectional view taken along the line ■-■ in FIG.

Claims (1)

[Scope of utility model registration request] 1. An input pen for use in a capacitive coupling type input device, characterized in that a probe of the input pen is formed from a conductive writing lead.