JPS60107131A - Cursor for digitizer - Google Patents

Abstract

PURPOSE:To avoid the input of the wrong corrdinate value by connecting a detecting switch for contact with the digitizing face of a cursor in series to a coordinate point indicating switch and feeding the coordinate point when the cursor is standing still to said digitizing face. CONSTITUTION:A switch 6 is provided on a cursor face 5 to detect a contact between the face 5 and a flat plate type digitizing face (not shown in the figure). Then the switch 6 is connected in series to a coordinate point indicating switch (not shown in the figure). Then the switch signal is supplied to a digitizer controller (not shown in the figure) via a cable 4. The swtich 6 is opened when a curson (not shown in the figure) is moved to invalidate the input carried out in a shift mode of the cursor.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a free cursor type digity type cursor which is free from errors in manual coordinate values of figures.

In general, free cursor type digitizers are often used as graphic input devices in CAD/CAM systems, which have recently been increasingly introduced with the aim of increasing the efficiency and quality of design and manufacturing. This device consists of a flat digitizing surface, a coordinate point detection and pointing device called a cursor, and a control device. This cursor is connected to the control device by a gable, and its size is such that the operator can grasp it with his hand and move it freely on the digitizing surface.

FIG. 1 is a perspective view of an example of this type of cursor. In the figure, reference numeral 1 is a transparent plastic plate, and a circular hole in a part of the plate is attached by writing a cross mark 2 on another thin transparent plastic plate on the digitizing surface side. 3,3'
is a push button switch for specifying coordinate points and for other commands.

The coordinate values of the figure can be determined by touching the cursor surface 5 of this transparent plastic plate 1 to the digitizing surface and f9T' of the figure.
After aligning the cross mark 2 with the position W, input by pressing the push button switch 3 for specifying the coordinate point n7:). At this time, the operator is informed by a beep or the like that the coordinate values of the figure have been input into the system.

In the conventional cursor, when the push button switch 3 for specifying the coordinate point is pressed in inches, the switch closes. This switch signal is supplied to the digitizer control device through the cable 4, and the digitizer control device detects the closed circuit state of the switch signal and switches the digitizing direction -4 indicated by the cursor at that point. The coordinate values of - were being sent to the system.

However, as soon as this pushbutton switch 3 is pressed, the coordinate values detected by the cursor are input, so move the cursor's crosshairs (7-2) to the predetermined figure position and press the pushbutton 3 for specifying coordinate points. Moving the cursor forward has the disadvantage that the exact coordinates of the figure cannot be entered.

The purpose of this invention is to prevent incorrect coordinate values from being input, based on the consideration of E, if the cursor is moved to n1 when the coordinate point designation push button is pressed, all input will be invalidated. Our goal is to provide a full range of DigiType cursors.

The structure of this invention is that the cursor for a free cursor type digitizer moves the cursor on a figure, digitizes the equalization value of this cursor, and inputs it to the converter.
A coordinate point indicating switch that is pressed when inputting a gauge point to P of the figure No. 11, and a switch connected in series with this coordinate point indicating switch:r''L installed on the contact surface with the digitizing surface of the cursor rjr- )fL is provided with a contact detection switch for detecting the contact, and is configured to input the coordinate point when the cursor contacts the digitizing direction.

This invention will be explained in detail below with reference to the drawings.

FIG. 2 is a perspective view of an embodiment of the invention. This embodiment is characterized in that a contact detection switch 6 for detecting contact with the cursor surface 5 is provided. This switch 6 is configured such that a contact detection switch 6 is connected in series with the coordinate point designating switch 3 so that when the cursor is moved, the contact detection switch 6 becomes open. Therefore, even if you press the pushbutton switch 3 for indicating the point (-",
The switch circuit enters the t4H state and does not send the coordinate value 7 from the digitizer to the system. Therefore, specifying the coordinate point is prohibited while the cursor is moving, and the
aThe buzzer that informs the operator of the target human power does not sound, so
The operator needs to perform the coordinate value input operation again, and it is important to note that accurate coordinate values are always input.

Note that the contact detection switch 6 has its contact detection element 10 slightly pushed away from the cursor surface 5 that contacts the digitizing direction, so when the contact detection element 10 comes into contact with the digitizing surface, the contact is caused by the reaction. This is an example of a force being applied to the detector 10. A pressure-sensitive conductive rubber sheet (9) is inserted between the contact detector 10 and the cursor body by this method.
Pressure is applied to the pressure-sensitive conductive rubber sheet, and this pressure significantly reduces the volume resistivity of the pressure-sensitive conductive rubber sheet.

FIG. 3 is a characteristic diagram showing an example of the relationship between pressure and volume resistivity of a pressure-sensitive conductive rubber sheet. In the figure, state B with a pressure of about 0.2 kg corresponds to a state in which the cursor is in contact with the entire digitizing surface, and state A with a pressure O corresponds to a state in which the cursor is separated from the digitizing direction. For example, if the thickness of the pressure-sensitive electrostatic rubber sheet is 1 mm and the area to which pressure is applied is ICm2, then in state B, where a pressure of 200 g/cm2 is applied, its resistance value is approximately 30Ω, and in state A, it is 100uΩ. becomes. The compression ratio of this pressure-sensitive conductive rubber sheet is 2% or less at a pressure of about 200 g/cm 2 and 0.02 fTITl at a thickness of 1 rrm. Therefore, when the cursor is moved slightly away from the digitizing surface, the contact detection switch becomes open. When this cursor is in contact with the digitizing surface, a pressure of 200 g is not enough to be obtained, so the resistance value of the contact detection switch 6 is several tens of Ω.
The result is a closed circuit state. ηWhile the cursor is moving, the value is about 100 MΩ, so it is in an open circuit state.

FIG. 4 is a sectional view XX' of FIG. 2. In FIG. 4, the contact detector 10 protrudes from the cursor body 11 by a distance t1, and considering the compression ratio of the pressure-sensitive conductive rubber sheet, this protrusion value is Q, 5 if the cursor surface 5 is flat and 6 g. m m
The following is sufficient.

Figures 5(a) and (b) are enlarged views of part A in Figure 4.
The difference in Figures 5(a) and 5(b) is due to the difference in switch configuration. In FIG. 5(a), 7 and 8 are the electrodes of the contact detector and the cursor body, respectively, and their shapes are concentric circles with no electrode in the center. Further, the pressure-sensitive conductive rubber sheet 9 has the same concentric shape as the electrodes, and the lead wires 12 and 12 of the switch from the respective electrodes 7 and 8
' is connected in series to the coordinate point indicating push button switch 6.

Figure 5(b) shows a structure in which the pressure-sensitive conductive rubber sheet 8, 8' and the cursor body side electrodes 9, 9' are divided into two parts, and the contact detector side electrode 7 is made up of two pressure-sensitive conductive rubber sheets. 9.9' is in contact with the structure. In this case, the lead line 12,
1g has the advantage that it can be drawn out from the electrode 8.8' of the cursor body.

As is clear from the following explanation, by connecting the contact detection switch with the cursor to digitize (11) in series with the cursor's coordinate point indicator switch for the free cursor type digitizer, the coordinate point finger is not required when moving the cursor. Even if you press the pushbutton switch, the contact detection switch is in the open state, so the digitizer control device cannot detect the closed state of the coordinate point indicating switch. Therefore, since accurate coordinate values are always input, there is an effect that even if there are a large number of figure coordinate values, the input Lb can be accurately input.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional cursor, Fig. 2 is a perspective view of an embodiment of the present invention, Fig. 3 is a characteristic diagram of a pressure-sensitive conductive rubber sheet, and Fig. 4 is a contact diagram of Fig. 21. A sectional view of the detection switch, (+) in FIG. 5, (11) is an enlarged view of the part shown in FIG. 4A. In the figure (8te 1... cursor transparent plastic plate, 2°... cross mark, 3.3'
......Push button switch, 4...Couple, 5...Cursor surface that comes into contact with the Digiquiz song, 7...Electrode on the surface of the contact detector, 8゜8'・
...City 1 pole on the cursor surface, 9,9'...
Pressure-sensitive conductive notebook, 10...Touch detector, ]1
. . . cursor body, 12.12' . . . lead line from the electrode. Repulsive force (Kl/c泗り￥-,t@(')

Claims (1)

[Claims] In a free cursor digital type cursor that moves a cursor in a shape, converts the cursor position into all numerical values, and inputs them to the computer, there is a switch for specifying the coordinate point that is pressed when inputting the coordinate point of the shape, and this coordinate point. a contact detection switch connected in series with the instruction switch and configured to detect the contact of the cursor with the digitizing surface; A digitizer cursor characterized by the ability to input coordinate points.