JP2964254B2 - Coordinate position input device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to detecting and calculating a moving length of a joystick having a short and long operation rod length from a fulcrum by a digital value corresponding to a cursor position on an image display surface. It is useful as a coordinate position input device that can smoothly operate all possible directions, and is widely used in recent electronic devices such as OA, educational training, and entertainment.

`` Conventional technology '' The basic configuration of a joystick consists of an operating rod with a rotary axis, which is the adjustment axis of a variable resistor that is orthogonal to each other, skewed around the fulcrum, in all directions, not only in the X and Y axis directions. The operation rod can be freely operated, and after the operation of the operation rod is completed, the operation rod is held in a vertical position by the elastic force of a return spring suspended on the rotation axis. The applied load is the sum of the resilience of the two return springs and the sliding frictional resistance at the rotary support. When the operating rod is operated in the oblique direction, the elasticity of the two return springs is obtained. The load applied to the operating rod due to both the acting forces becomes non-uniform depending on the inclination angle and the direction of the operating rod, and the shorter the operating rod length is, the larger the load received is, which has a barrack defect.

Therefore, as a proposal for solving the above-mentioned disadvantage, for example,
Japanese Utility Model Registration Application No. 81969 is known, but it has a complex structure that makes the load received by the short and small operation rod from the fulcrum in all directions uniform and returns to the vertical posture at rest, and the joystick There is a problem in the smooth operability.

On the other hand, in order to change the coordinate position on the image display surface by operating the joystick, the voltage value of the variable resistor corresponding to the amount of movement in the X and Y axis directions is converted to a digital value by an A / D converter, and the capacitor is further changed. In the case where the coordinate position is determined based on the time constant required to reach the predetermined electric capacity in combination with the variable resistor, there is a disadvantage that the variation of the detection time due to the fluctuation of the time constant cannot be avoided. .

Therefore, as a proposal for improving the above-mentioned disadvantage, for example,
According to the document disclosed in No. 33529, the moving direction and the moving direction are determined based on a plurality of fine identification lines traversed by the vertical and horizontal coordinate position indicators while detecting the coordinate position by a digital value. Since the method of detecting the amount is employed, the input data processing after the detection has to go through a number of steps, which has the disadvantage that it takes time.

"Problems to be Solved by the Invention" In view of the obstacle in front of the vertical, the present invention relates to the movement of the cursor on the image display surface, and the contact of the joystick covering all directions in the X and Y axis directions. It is an object of the present invention to obtain a coordinate position input device in which digital data can be directly transmitted by a slight rotation of a switch portion, a calculation processing speed is high, and a total number of components is small.

"Means for solving the problem" The present invention focuses on the fact that the relationship between the inclination of the operation stick of the joystick and the processing capacity of the processor is related to the resolution for displaying the cursor position on the image display surface, X,
The configuration is such that the CPU can calculate the amount of movement of the cursor as a function of time so that it can cover 180 degrees even if the center angle of the annular switch board arranged orthogonally to the Y axis is narrowed.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

"Embodiment" First, FIG. 1 shows X, Y in the coordinate position input device of the present invention.
FIG. 2 is a circuit configuration diagram of an encoder combining a joystick and a resistor for each of the X and Y axes, and a CPU for performing calculations, for each of the X and Y axes.

In FIG. 1, reference numeral 1 denotes a switch substrate, and 2 denotes a rotation axis 0 and T ₁ , T ₂ , T ₃ , and T ₄ of a track 4 for 4 bits and a common track Tc on a concentric circle with respect to the rotation center. Equal pitch P
The conductive patterns are arranged up to the maximum number of bits as a whole. θ is the maximum central angle of the switch board having the conductive pattern, 3 is a non-conductive area on the switch board, 60, 61, 62, 63, 64 are fixed arm terminals mounted on the support member 5, 50, 51, A sliding contact 6 is an operating rod of the joystick 10. The sliding contact 52 has a flexible tip at each end and slides on the tracks on the conductive pattern and the non-conductive area.

The switch board is supported on the outer casing wall surface of the joystick, and the pointing member rotates within a maximum central angle of 60 degrees in this embodiment.

When the operating rod is rotated in the omnidirectional direction b as indicated by the arrow, both the X-axis shaft 7 and the Y-axis crank 8 supported on both ends of the outer casing wall reciprocate at a fixed angle, and the operating rod is moved in the direction indicated by the arrow. a
When tilted in the direction, the X axis reciprocates in the C direction in the hollow portion of the Y axis crank 8.

If the central angle of the switch board is, for example, 60 degrees,
In order to cover each of the X and Y axes by 180 degrees, the switch board must be sent 60 degrees at a time and the ON and OFF data must be collected three times each, but the rotation of the X axis shaft and Y axis crank must be performed. The moving angle can be reduced, which is advantageous for the operation speed. That is, since the number of sliding contacts and the number of tracks can be reduced, the processing speed is increased.

Since the switch board is fixed and does not move, when the sliding contact reaches the edge on the switch board, the CPU determines that the track is kept in contact with each track for a certain short time, and the next 60 degrees It moves to and operates to detect data.

If the above-mentioned central angle is an angle of, for example, 20 degrees, the conductive pattern line on the same track cannot be detected as an on / off signal, so that the angle is set to a practically suitable conductive and non-conductive region pattern line. Is preferred.

Therefore, the sliding contact slides and rotates on the switch substrate surface,
Signal obtained from the functions as an electrical switch at time t ₁ becomes the digital output of 1-0-0-0 from the track T ₁ in order, the digital output of 0-1-1-0 in t _2.

Thus, when the operation stick of the joystick is followed while observing the movement of the cursor on the display for image display, the electric switches provided in the respective X and Y-axis directions at that time transmit digital signals of ON and OFF. The data will be transmitted as an encoder.

Then X consisting of resistors 111-114 and 211-214 are connected to the respective sliding contact as the joystick and the voltage generating unit constituting the digital switch SW ₁ and SW ₂ by Figure 2, Y
Dedicated encoder 20 for each axis and data processing function
The operation with the CPU 30 will be described. In the drawing, it is shown that all the sliding contacts are in a state of “1”, which is not in contact with the conductive pattern.

The digital signal of "0" or "1" obtained by the conduction and non-conduction of each track between the conductive pattern and the sliding contact is a voltage drop due to the energization of the resistor connected to each sliding contact. Is set to, for example, 5 volts, a 5 volt output is obtained corresponding to the "1" output, and applied to the CPU as an input.

Since the common track T _CY or T _CX provided on the joystick switch board is a continuous conductive pattern, it always maintains contact with the sliding contact regardless of the coordinate position, and has the function of electrical grounding. It's done.

Therefore, the CPU receives the input of 0 or, for example, 5 volts in response to the ON / OFF signal by the joystick by aligning the origins of the X and Y axes with the cursor position on the image display surface, and outputs the reference clock to the internal reference clock. By processing the captured data by comparing, the amount of movement of the cursor as a function of time is detected, and the data can be output from the terminal 31 by, for example, infrared rays.

If the cursor moves from point A to point B on the screen, the origin of the X and Y axes also moves from point A to point B, and the amount of movement is calculated and processed on a time scale. be able to.

[Effect] According to the present coordinate position input device, the resolution for displaying the cursor position on the image display surface is obtained by dividing the tilt angle of the joystick operation rod by the processing capacity of the data processor, and It is enough to provide a switch board with a center angle of a fraction of 180 degrees with respect to the X and Y axes, so digital data processing can be performed directly in all directions with a smooth equalizing load and with a small rotation angle and a small number of parts. You can expect a long life.

According to the present coordinate position input device, by providing a switch board having a center angle of a fraction of 180 degrees with respect to the X and Y axes, the number of tracks is reduced, the switch board itself is reduced, and the direction a Since the angle at which the operating rod is tilted becomes smaller, the operating range of the operating rod becomes narrower and the maximum load of the spring resilience decreases, and the difference between the zero load and the maximum load is small, resulting in a uniform pressure load. .

In addition, an excellent effect not seen in the past can be exhibited, for example, the cursor moving time can be arbitrarily changed by changing a program to be set in the CPU.

[Brief description of the drawings]

FIG. 1 is a side view of a joystick main part for one of the X and Y axes in the coordinate position input device of the present invention, and FIG.
FIG. 3 is a circuit configuration diagram of an encoder that combines a joystick and a resistor for each of the X and Y axes and a CPU that performs arithmetic processing. DESCRIPTION OF SYMBOLS 1 ... Switch board, 2 ... Conductive pattern, 3 ... Non-conductive part, 4 ... Track, 5 ... Support member, 6 ... Operation rod, 50-54 ... Fixed arm terminal, 60-64 ... Sliding contact, 7 ... X-axis shaft, 8 ... Y-axis crank, 20 ...
Encoder, 30 CPU, 31 Data output, 111 to 114
And 211-214 ... resistors.

Claims (1)

(57) [Claims] A CPU for calculating a moving amount as a function of a moving time of a cursor moving on an image display surface by dividing an inclination angle formed by a joystick operating bar with respect to a horizontal plane by 2 ⁿ bits of information processing capability of a processor; Of the four quadrants divided by the X and Y axes having the origin at the cursor stationary point on the image display surface, the operation using the origin as the center of rotation is performed over two quadrants corresponding to the X and Y axes respectively. N sliding contacts interlocked with the rotation of the rod, and n tracks concentrically arranged at an equal pitch with respect to the rotation center on which the sliding contacts slide, and the total number of tracks is at most 2 ⁿ A switch substrate having an arc shape having an angle of a divisor of 180 degrees and having a conductive pattern formed by dividing the conductive contact into contact and non-contact at the same point of the sliding contact and each track on the switch substrate Digital signal of “0” or “1” A coordinate position input device characterized in that it is converted and transmitted.