JPH04424Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a digitizer cursor that can accurately and easily read an object to be measured. More specifically, the present invention relates to a digitizer cursor that allows the cross line of the cursor to accurately and easily match the target point of a measurement object when the cursor is used to detect the coordinate position of a manual digitizer.

``Prior art'' There are various methods for detecting coordinate positions using this type of cursor. For example, in the case of the electromagnetic induction method, a transparent window with a diameter of about 30 mm is formed at the tip of the cursor body, and a black A cross line was engraved with a wire, and a coil excited by an AC power supply was wound around the window, and the coordinate position was detected by aligning the intersection of the cross lines with a point on the object to be measured.

``Problem that the invention aims to solve'' However, since the cross line is marked with a black line, when the object to be measured is written in white or a bright color, it is difficult to match the cross line to that point. is easy, but when the object to be measured is written in black or dark colors,
There was a problem in that it was difficult to match the points and accurate position detection was not possible.

``Means for Solving the Problems'' This invention was made to solve the above-mentioned problems, and it uses grooves that emit fluorescent light to mark the cross lines of the pointer on a plastic panel containing fluorescent paint. It is something that is formed.

``Operation'' The plastic panel that makes up the pointer absorbs direct light and dispersed light from the surroundings, and within the plastic, this light is emitted as fluorescent light, which is completely reflected internally and travels to the edges of the plastic. Since the cross line is also constituted by a groove, fluorescence is emitted from the groove portion as well as from the edge, and the light is emitted in a clear linear shape. By using this light-emitting cross line, the position of the object to be measured can be accurately and easily detected whether the object is white, black, or intermediate in color.

``Example'' An example of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a cursor body for a digitizer, and this cursor body 1 has an AC power supply built-in in the case of an electromagnetic induction method, and a coil 3 excited by the AC power supply is buried inside a window frame 2 at the tip. There is.
A pointer 4 having a diameter of about 30 mm and a height of about 10 mm is detachably provided on the window frame 2. The material of this pointer 4 is transparent plastic containing fluorescent dye 5 (for example, Bayer's LISA-plastic).
It has a cylindrical shape with a flange 6 at the lower end, and on the lower surface,
A V-shaped groove with a width of 0.1 to 0.2 mm and a depth of about 0.1 mm is cut through the center and perpendicular to each other, forming a so-called cross line 7. By removably fitting this point 4 into the window frame 2, it becomes floating with a gap of about 1 mm between it and the object to be measured 8, as shown in FIG. In order to protect the lower surface having the cross line 7, a transparent protective sheet 9 may be attached as shown in FIG.

In the above configuration, the measurement object 8 is detected by the pointer 4 on the window frame 2 of the cursor body 1. At this time, the pointer 4 absorbs the incident direct light and dispersed light from the surroundings, and the fluorescent paint 5 inside the plastic emits it as fluorescence. The fluorescence is totally reflected internally and transmitted to the edge. At this time, the part of the cross line 7 consisting of the V-shaped groove also becomes an edge, and therefore fluorescence is emitted from there, so that only the part of the cross line 7 emits light so as to be clearly distinguished from other surfaces. . Therefore, points can be detected without any problem whether the measurement object 8 is white, black, or intermediate color.

Since the pointer 4 is removably attached to the window frame 2, it may be used by replacing it with a pointer having a black cross line or a white cross line, for example.

Note that the intensity of light for shining the edge including the cross line 7 is proportional to the area of the pointer 4, so it is desirable to make the area as large as possible.
Further, by maximizing the absorption and emission of light by the fluorescent paint and minimizing the overlap between absorbed light and diverging light, high fluorescent light intensity can be obtained.

"Effect of the invention" As mentioned above, the present invention is configured so that the cross line of the cursor pointer emits fluorescence, so whether the object to be measured is white, black, or intermediate color, position can be detected accurately and easily. Therefore, operability is excellent and operator fatigue can be eliminated. Furthermore, by making the pointer removable, a single cursor can be used with a plurality of pointers depending on the purpose of use.

[Brief explanation of drawings]

The figures show one embodiment of the cursor according to the present invention, in which Fig. 1 is an exploded perspective view, Fig. 2 is a perspective view seen from the bottom of the pointer, Fig. 3 is a cross-sectional view, and Fig. 4 is a view of fluorescent radiation. The explanatory diagram, FIG. 5, is a sectional view of another embodiment. 1... Cursor body, 2... Window frame, 3... Coil, 4... Pointer, 5... Fluorescent paint, 6... Flange, 7... Cross line, 8... Measurement object, 9
...protective sheet.

Claims (1)

[Claims for Utility Model Registration] (1) A cursor characterized by forming a pointer cross line with grooves that emit fluorescent light on a plastic panel containing fluorescent paint. (2) The cursor according to claim 1, wherein the pointer is detachably attached to the cursor body.