JPH01145716A - Coordinate input device - Google Patents

Abstract

PURPOSE:To quickly execute an alternate repetition of a cursor operation and a ten-key operation by providing ten keys for issuing an instruction of a dimension display related to a graphic plotted on the screen of a display device, and an instruction of other numeral display, on a casing itself for executing the cursor operation. CONSTITUTION:The title device is constituted of a casing 1, a ball 2, a running ball 3, an X direction roller 4, a Y direction roller 5, an auxiliary roller 6, an X direction rotary encoder 7, a Y direction rotary encoder 8, signal processing circuits 17, 18, etc. Also, on the top board 1d of the casing 1, a recessed part 1e is formed, and on this recessed part 1e, ten keys T1 are provided. In such a way, since the ten keys T1 for giving an instruction of a dimension display related to a graphic drawn on a screen of a display device 6 and an instruction of other numeral display are provided on casing 1 itself in a coordinate input device for executing cursor operation, an alternate repetition of the cursor operation by a movement of the coordinate input device and the ten-key operation can be executed quickly.

Description

[Detailed description of the invention]

<Industrial Field of Application> The present invention is generally referred to as a "mouse," and is used to move a cursor to determine the starting and ending points of a figure to be drawn while looking at the screen of a display device in a computer or figure processing device. The present invention relates to a coordinate human power device used for moving the cursor or moving the cursor to a desired menu position among menus displayed in a list on a screen and operating a switch to select that menu. <Prior art> An example of a conventional coordinate input device of this type is shown in FIGS. 6 to 1.
Shown in the θ diagram. As shown in FIG.
connected via. FIG. 7(A) is a schematic side view of the coordinate input device M, and FIG. 7(B) is a schematic side view of the coordinate input device M.
is a schematic bottom view thereof. In FIG. 7, 1 is a casing, 2 is a ball rotatably held in the casing 1 with a portion protruding downward from the center of the bottom plate 1a of the casing 1, and 3 is the periphery of the bottom plate 1a of the casing 1. This is a running ball rotatably held in the casing 1 in the same state at multiple locations in the section. FIG. 8 shows the internal structure of the casing 1. Casing 1
Inside, an X-direction roller 4, a Y-direction roller 5, and an auxiliary roller 6 are rotatably held in contact with the ball 2. The auxiliary roller 6 includes the ball 2 and the X-direction roller 4. This is to ensure contact with the Y-direction roller 5. The rotation axis 4a of the X-direction roller 4 and the rotation axis 5a of the Y-direction roller 5 are horizontal axes orthogonal to each other.
is a drive shaft for the X-direction low-return encoder 7° and the X-direction low-return encoder 8. Each row encoder 7.8 has the following configuration as shown in FIG.
Multiple slits 9 for A phase and multiple slits 1 for B phase
As shown in FIG. A
A light emitting element 12 placed on one side of the light shielding disk 11 facing the phase slit 9 and a light receiving element 13 placed on the other side, and a light shielding element 12 facing the B phase slit 10. A light emitting element 14 arranged on one side of the disk 11, a light receiving element 15 arranged on the other side, and a light emitting element 12.14
and a slit plate 16 that limits the optical path. Signal processing circuits 17 and 18 are connected to the output sides of the X-direction rotary encoder 7 and the Y-direction rotary encoder. These signal processing circuits 17 and 18 include amplifier circuits 19a and 19a connected to the next stage of the light receiving elements 13 and 15, respectively.
19b, the next stage waveform shaping circuit 20a. 20b, a one-shot circuit 21 at the next stage of the waveform shaping circuit 20a, and a D-type flip-flop 22 at the next stage of the waveform shaping circuits 20a and 20b. The A-phase signal output from the waveform shaping circuit 120a is output as a displacement signal via the one-shot circuit 21, and the A-phase signal from the waveform shaping circuit 20a and the B-phase signal from the waveform shaping circuit 20b are connected to a D-type flip-flop. 22 as a direction signal. That is, holding the casing 1 of the coordinate input device M by hand,
When the casing 1 is moved in the X direction with the ball 2 in contact with a flat surface B such as a desk, the ball 2 rolls and the light shielding disc 11 is rotated by the driven rotation of the X direction roller 4. By rotating the light-shielding disc 11, the slit 9 for phase A is created.
When the light receiving element 13 comes to a position facing the light emitting element 12, the light receiving element 13 becomes conductive and outputs a pulse signal. This pulse signal is amplified, waveform-shaped, and output to the one-shot circuit 2 as an A-phase signal.
1 and is input to the D@ child of the D-type flip-flop 22. On the other hand, when the light-shielding disc 11 further rotates and the B-phase slit 10 comes to a position facing the light-emitting element 14, the light-receiving element 15 becomes conductive and outputs a pulse signal. This pulse signal is amplified, waveform-shaped, and input as a B-phase signal to the CL terminal of the D-type flip-flop 22. As shown in FIG. 1f (A), the one-shot circuit 21
outputs a one-four-bit pulse signal that rises at the rising edge of the A-phase signal as a displacement signal. The D-type flip-flop 22 outputs "H" from the Q output terminal when the A-phase signal is "H" at the rising timing of the B-phase signal, and outputs "H" from the Q output terminal when the A-phase signal is "H" at the rising timing of the B-phase signal.
The output of "H" is maintained until the phase signal becomes "L". Also, as shown in FIG. "L" is output from the output terminal, and the "L" output is maintained until the A-phase signal becomes "H" at the rising timing of the B-phase signal.In other words, the coordinate input device M moves in the right direction X. However, when the light-shielding disc 11 is rotating in the positive direction, the D-type flip-flop 22 maintains the "H" output state, the coordinate input device WM moves in the left direction XL, and the light-shielding disc 11 rotates. When rotating in the negative direction, the D-type flip-flop 22 maintains the "L" output state. The H" or L" signal output from this D-type flip-flop 22 becomes a direction signal. This point is common to both the X-direction rotary encoder 7 and the Y-direction rotary encoder 8.The main body A of the computer or graphic processing device receives displacement signals and direction signals from the coordinate input device i!M via the cable C. and move the cursor P on the screen of the CRT display device according to these signals.When the coordinate input bag WM is moved in the right direction xII along the X direction, from the one-shot circuit of the The displacement signal is intermittently output, and the D-type flip-flop continuously outputs the H'' direction signal. Then, the main body A controls the display device WD to move the cursor P to the right one digit at a time in the standard mode and one dot at a time in the dot operation mode for each pulse of the displacement signal. A displacement signal of N is generated by one movement operation of the coordinate input device M.
If a pulse is output, the cursor P also moves by N digits (or N dots). Conversely, when the coordinate input device M is moved in the left direction XL along the
is moved to the left one digit at a time in standard mode, and one dot at a time in point operation mode. Furthermore, when the coordinate input device M is moved in the rear direction Ytl along the X direction, a displacement signal is output from the one-shot circuit on the X direction rotary encoder 8 side, and an "H" direction signal is output from the D flip-flop. is output. Then, the main body A moves the cursor P every pulse of the displacement signal.
is moved upward one line at a time in the standard mode, and one dot at a time in the dot operation mode. Conversely, when the coordinate input device M is moved in the forward direction Y along the If so, move it downward one dot at a time. The front swash plate 1b of the casing 1 has two switches 23.
24 is installed. The switch 23 is a switch that is pressed down to determine the position of the cursor P after movement as the starting point or end point of a figure to be drawn, or to transmit a message to the main body A when selecting a desired menu. is a switch to press to return the current screen to the menu screen (initial screen). Two one-shot circuits 21 in coordinate input device FM
A line for transmitting a total of six signals: each displacement signal from the main body A side, each direction signal from the two D-type flip-flops 22, and command signals from the two switches 23 and 24 to the main body A side, and a line from the main body A side. At least seven lines in total including the power supply lines for feeding power to the coordinate input device fM are configured as a cable C, and this cable C is connected between the main body A and the coordinate input device 1M. After drawing a figure on the screen of the display device WD using the coordinate input bag WM, dimensions are displayed on the figure. For example, the operating procedure when it is desired to display dimensions as shown in FIG. 1412 on a figure drawn as shown in FIG. 1412 will be explained. First, when displaying the dimension r 10.5 J, by moving the coordinate input bag ffM in the X direction and the Move the cursor P to the display position of the dimension "10.5". Next, operate the number keys and decimal point key of the numeric keypad T on the keyboard K in the order of (1), (01° (・), and (5). As a result, as shown in FIG. 13 (B), the dimensions The dimension r 10.5 J is displayed at the position to be displayed. Next, in order to display the dimension r 4.7 J, the coordinate input device M is again moved in the X direction and the X direction on the plane B. As a result, as shown in FIG. 13(B), the cursor P
Move to the display position of dimension r 4.7 J. Next, operate the numeric keys and decimal point key of the numeric keypad T on the keyboard K in the order of (4], (・). [7]. As a result, as shown in FIG. 13(C)
As shown in , the dimension "4.7J" is displayed at the position where the dimension should be displayed. Below, the operation of moving the coordinate input bag fiM in the X direction and Y direction to move the cursor P to the dimension display position will be explained. ,
Keyboard K for displaying dimensions at the dimension display position
Repeat the operation of the numeric keys on the numeric keypad T and the decimal point key in turns. <Problem to be solved by the invention> However, the cursor P due to the movement of the coordinate input device M
It is extremely troublesome to alternately and repeatedly perform the operations of , and the operations of the numeric keypad T on the keyboard K. That is, ■ After completing the cursor operation, you must move your hand from the coordinate input device M to the numeric keypad T on the keyboard, and after completing the numeric keypad operation, you must move your hand from the numeric keypad T to the coordinate input bag ffM This type of transfer is troublesome. ■(Cursor operation → Numeric keypad operation) → (Cursor operation →
Numeric keypad operations)→... must be repeated as many times as there are dimension displays, and when there are a large number of dimension displays, this alternately repeated operation is extremely troublesome. ■ Every time the dimension display position changes, the position of the coordinate input device M also changes, and the direction and distance of hand transfer between the coordinate input device M and the numeric keypad T change each time. It is very troublesome to transfer. Further, even for an experienced operator, it is difficult to change hands in a blind touch manner. As described above, in the case of the conventional example, there was a problem in that the coordinate input device M and the numeric keypad T on the keyboard were separated, so that the work efficiency of dimension display was low. The present invention has been made in view of the above circumstances, and an object of the present invention is to improve the workability of alternately repeating cursor operation and numeric keypad operation. <Means for Solving the Problems> In order to achieve the above object, the present invention has the following configuration. That is, the present invention provides: a casing; a ball rotatably installed in the casing with a portion protruding downward from the bottom plate of the casing; A coordinate input device equipped with an X-direction rotary encoder and an X-direction rotary encoder that output displacement signals and direction signals corresponding to It is characterized by the presence of <Actions> The effects of the configuration of the present invention are as follows. A coordinate input device that operates a cursor is provided with a numeric keypad on the casing itself for giving instructions for displaying dimensions and other numbers for figures drawn on the screen of a display device. You can quickly alternate between cursor operation by moving , and numeric keypad operation. <Example> Hereinafter, an example of the present invention will be described in detail based on the drawings. FIG. 1 is an external view of a coordinate input device M (mouse) according to an embodiment of the present invention. Two switches 23, 2 are installed on the front swash plate 1b of the casing 1.
4 is attached, and a cable C is led out from the front end plate 1c of the casing 1. Ball 2. Running ball 3. X direction roller 4. Y direction roller5. Auxiliary roller 6, X direction rotary encoder 7,
Directional rotary encoder8. The configurations of the signal processing circuits 17, 18, etc. are the same as those of the conventional example, so their explanations will be omitted. A recess 1e is formed in the top plate 1d of the casing 1, and a numeric keypad T1 is provided in this recess 1e. The numeric keypad T1 in this embodiment has 10 numeric keys.

[0]
~

[9], decimal point key [・], comma key (=), plus key [+], minus key [-], plus/minus key [±], and function key [tatami], totaling 16 keys. It consists of a set of keys. The functions of the function keys shall be determined arbitrarily. FIG. 2 is a cross-sectional view of the top plate 1d of the casing 1. As shown in FIG. This is to prevent the hand holding the casing 1 from accidentally touching the keys when moving the coordinate input device M in the X and Y directions. For the purpose of explaining this embodiment, FIG. 3 shows the correspondence between the symbols S, -S+S assigned to each key on the numeric keypad Tl and each key. FIG. 4 shows the circuit configuration of the numeric keypad T1 and its surroundings. The keys S and ~srs that make up the numeric keypad TI are 4 lines, 4
It constitutes a digit key matrix circuit 25. Vcc is a DC power supply supplied from the main body A via a cable C, and the four vertical signal lines L0 . L.I.
+ t, ffi, Ls are pull-up resistors R6, R+,
Rt', Rs, and four horizontal signal lines L4. L.S. Li and Lt are pull-up resistors R,,R,,R,. Connected via R7. Each of the keys 30 to SIS is inserted between one vertical signal line and one horizontal signal line. The key matrix circuit 25 includes a key encoder circuit 2 for determining which key has been pressed and transmitting it to the main body A.
6 is provided as an accessory. This key encoder circuit 26 includes an oscillator 27, a frequency divider 2
8.2bit-4bit decoder 29.4bit-2
It consists of a bit encoder 30 and an AND gate 31. The output terminal a of the frequency divider 28 is the input terminal I0 of the decoder 29.
The output terminal is connected to the input terminal 11. The period of the rectangular wave pulse signal output from the output terminal a is twice the period of the rectangular wave pulse signal output from the output terminal a, and when the frequency divider 28 is driven by the oscillator 27, , from both output terminals a and b (11),
(10), (01). The signal string (00) is the input terminal io of the decoder 29. ■It is repeatedly output for . As a result, the output terminals O0゜01, O of the decoder 29
The output status of x and Os is “L” level for L and “H” for H.
As a level, (LHHH) → (HLHH) → (HHL
This is a scanning output in which the cycle of H)→(HHHL) is repeated. That is, in any sampling period, the four vertical signal lines L0 to L of the key matrix circuit 25,
One of the lines has the "L" level, and the lines at the "L" level are sequentially scanned in the order of L0 → L1 → L2 → L3.The four key matrix circuits 25 Signal line L next to
Ls, L, , t, y are input terminals Is of the encoder 30
, +4. Is, connected to 16 and AND
It is connected to the input terminal of gate 31. The output terminals a, b of the frequency divider 28, the output terminals Oa, Os of the encoder 30, and the output terminal of the AND gate 31 are signal lines L, , L, , L, respectively. . Input terminal 1 of input interface 32 on main body A side via L, , L, □. , Is, 14. II. , 11, and further connected to the CPU 33 of the microcomputer. 16 keys S0~ making up the key matrix circuit 25
When none of the SIS is turned on, all horizontal signal lines L4. Ls, L6. AN
The signal line L1t of the output terminal of the D gate 31 becomes [1]. When this [1] signal is read into CP[33 via the input terminal I11 of the input interface 32,
In CPU U33, all keys S0 to S+S are OFF.
It is determined that For example, when the key S6 is turned on, during the sampling period in which the output state of the output terminals O1, 0□, o, , O, of the decoder 29 becomes (HHLH), the vertical The signal line L1 becomes 'L' level, and the horizontal signal line L to which the key S is connected
s also becomes the "L" level of the same potential via the turned ON switch S16. Therefore, input terminal 1 of encoder 30. . The state of Is, 14.13 becomes (HHLH), and the output terminal 0. ．． 0. signal line LII+
The state of LIO becomes [01]. Moreover, the signal line L+z of the output terminal of the AND gate 31 is

It becomes [0]. On the other hand, the output terminals Os, O! , O+, and Oo become (HHLH) during the sampling period, the signal line Lq of the output terminals S and a of the frequency divider 28. L, is (10). Therefore, the input terminal of the input interface 32! +
+, I+. , It, 4s, It state is (00110
), and since II+ is (0), the CPU 33 inputs the input terminals 11°, 1 . ．． 1
The CPU 33 reads the state of m and 1 and determines that key S is turned on since the state is (0110). As shown in FIG. 3, since the key S is a key with the numerical value "2", the CPU 33 displays "2" at the position of the cursor P on the screen of the display device based on the data (0110). . FIG. 5 shows the entire circuit configuration of the coordinate manpower bag ff1M. 17 inputs the A-phase signal and B-phase signal from the X-direction rotary encoder 7, outputs a one-shot displacement signal SXI that rises at the timing of the rising edge of the A-phase signal, and outputs a one-shot displacement signal SXI that rises at the timing of the rising edge of the A-phase signal. , when the coordinate input device M is moving in the right direction Xe along the X direction, the direction signal SX! This is a signal processing circuit that outputs "H" as a direction signal and "L" as a direction signal S when moving in the left direction XL. The coordinate input device M inputs a signal and outputs a one-shot displacement signal S□ that rises at the timing of the rise of the A-phase signal, and from the A-phase signal and the B-phase signal, the coordinate input device M moves in the rear direction Y along the X direction. This is a signal processing circuit that outputs H'' as a direction signal SVZ when the vehicle is moving in the forward direction Y, and outputs L'' as a direction signal SVZ when the vehicle is moving in the forward direction Y. Mounted on the front swash plate 1b of the casing 1. switch 23
is a switch for determining the cursor position after movement as the starting point or end point of a figure to be drawn, or for transmitting a message to the main body A when selecting a desired menu. Menu screen (first time! tlI
This is a switch to return to the screen). Signal line LI3 of displacement signal SXI of signal processing circuit 17 connected to X-direction rotary encoder 7, direction signal 5
signal line L14 of signal processing circuit 18 connected to X-direction rotary encoder 8, signal line L+s of displacement signal SV+ of signal processing circuit 18 connected to X-direction rotary encoder 8, signal line L14 of direction signal SVt, signal line L1 of switch 23, signal line Lll+ of switch 24. and signal lines Lll Ll+, 'Ll from the aforementioned key encoder circuit 26. ,L. L@ and the power line L19 from the main body A side to the coordinate input device M are put together as a cable C, and this cable C connects the coordinate input bag fM and the main body A (or the keyboard K). Next, the operation of the coordinate input device M of this embodiment will be explained. Assume that a figure has already been drawn on the screen of the display device [0] using the coordinate input bag ffM. The operations for displaying the dimensions necessary for the figure are as follows. In the same manner as described in the conventional example, the operating procedure when, for example, it is desired to display dimensions as shown in FIG. 12 on a figure drawn as shown in FIG. 12 will be explained. First, in order to move the cursor P to the display position of the dimension r 10.5 J, the coordinate input bag MM is moved in the X direction and the X direction on a plane B such as a desk. That is, holding the casing 1 of the coordinate input bag NM in your hand,
With the ball 2 and the traveling ball 3 in contact with a flat surface B such as a desk, move the casing 1 in the right direction xII along the X direction.
When the ball 2 is moved to
1 and a continuous “H” direction signal 5l1 indicating rightward movement.
1 is output. Next, when the casing l is moved in the forward direction YD along the Y direction, a displacement signal SV+ is output from the signal processing circuit 18 in accordance with the driven rotation of the Y direction roller 5, and a continuous "" signal indicating the forward movement is output. L” direction signal S. is output. Since the coordinate input bag WM can be moved simultaneously in the X direction and the Y direction, it may be moved in that manner. As a result of the movement of the coordinate input device M, as shown in FIG. 13(A), the cursor P appears on the screen of the display device.
moves to the display position of dimension r 10.5 J. Next, the numeric keypad T provided integrally with the coordinate input device M
The number keys and decimal point key at 1 are (1), (0)
, (・), and (5) in this order. Then, the corresponding data is sequentially transmitted from the key encoder circuit 26 to the main body A via the cable C, and as a result, the dimension r10. is displayed at the position where the dimension should be displayed, as shown in FIG. 13(B). 5 J is displayed. Next, in order to display the dimension r4.7J, hold the casing 1 of the coordinate input device M in your hand and move it in the right direction X and in the front direction Y.
As shown in B), the cursor P moves to the display position of the dimension r 4.7 J. Next, press the numeric keys and decimal point key of the numeric keypad T1 on the keyboard K again [4]. [・), then (7). Then, the corresponding data is sequentially transmitted from the key encoder circuit 26 to the main body A via the cable C, and as a result,
As shown in FIG. 13(C), the dimension r 4.7 J is displayed at the position where the dimension should be displayed. Below, the movement operation of the coordinate input device M in the X direction and Y direction for moving the cursor P to the dimension display position, and the numeric keys and decimal point keys of the numeric keypad T1 on the keyboard K for displaying the dimensions at the dimension display position will be explained. Repeat this operation alternately. In this alternately repeated operation, the numeric keypad TI that gives instructions for dimension display is provided on the casing 1 itself of the coordinate system M that performs the movement operation of the cursor P, so the alternating repetition of the cursor operation and the numeric keypad operation can be quickly performed can be done. In the case of this embodiment, each key constituting the numeric keypad TI is placed in the recess 1e of the top plate 1d of the casing 1, so when moving the coordinate input device M in the X direction and the Y direction, the casing This also has the advantage of preventing the hand holding No. 1 from accidentally touching the keys, thereby avoiding erroneous operations. It goes without saying that the numeric keypad TI may be used for inputting numbers other than displaying dimensions on the screen. In the above embodiment, the numeric keypad T1 of this embodiment is [
0〕〜

[9] number key, [・]. [ψ), (+), (-), (±), [Kaoru]
Although the present invention is made up of a total of 16 key groups, the present invention is not limited thereto, and various modifications can be made, and the arrangement of the key groups is also arbitrary. Instead of arranging the numeric keypad T1 in the recess 1e, a cover body that is detachable or openable may be provided on the top plate 1d to avoid erroneous operations. <Effects of the Invention> According to the present invention, the following effects are exhibited. A numeric keypad for giving instructions for displaying dimensions and other numbers for figures drawn on the screen of a display device is provided on the casing itself of a coordinate input device for operating a cursor. Since then, it has become possible to quickly alternate between cursor operation by moving the coordinate input device and numeric keypad operation. In other words, after performing cursor operation by holding the casing in your hand and moving it in the X and Y directions, when displaying dimensions (sometimes displaying other numbers), you must input coordinates with your hand as in the conventional example. There is no need to move the numeric keypad to a keyboard that is separate from the device, and in that case, the dimension display operation can be quickly performed using the numeric keypad that is present on the casing itself. Further, after such a ten-key operation, when moving to a cursor operation, the hand that was operating the ten-key pad may be placed on the casing in the same position. Therefore, switching between (cursor operation → numeric keypad operation) → (cursor operation → numeric keypad operation) → etc. can be performed very smoothly, and even if there are many dimension displays, switching between cursor operation and numeric keypad operation is always possible. This can be done promptly. In addition, since the casing and numeric keypad are integrated, the dimension display position changes and the distance between the coordinate input device and the keyboard changes.
Even if the direction changes each time, there is no effect from this, and the positional relationship between the casing and the numeric keypad is always constant, making it easy to operate even for an inexperienced operator. . As described above, since the numeric keypad is integrally attached to the casing of the coordinate input device, it is possible to significantly improve the work efficiency of the alternating repeated operation of the cursor operation and the numeric keypad operation.

[Brief explanation of the drawing]

1 to 5 relate to embodiments of the present invention, in which FIG. 1 is an external view of the coordinate input device, FIG. 2 is a sectional view of the top plate of the casing, FIG. The figure is a circuit diagram showing a key matrix circuit and a key encoder circuit, and FIG. 5 is a block diagram showing the entire circuit configuration of the coordinate input device. 6 to 11 relate to conventional examples, FIG. 6 is an explanatory diagram of the use state of the coordinate input device, FIG. 7 (A) is a schematic side view of the coordinate input device, and (B) is a schematic bottom view thereof. , FIG. 8 is an explanatory diagram of the internal structure of the coordinate input device, FIG. 9 is a front view of the light-shielding disc in the rotary encoder, FIG. 10 is a configuration diagram of the rotary encoder, and FIGS. 11 (A) and (B) ) is a time chart. Figure 12 is a diagram of the display state of the screen of the display device;
FIG. 3 is an explanatory diagram of the operation of dimension display. 1... Casing 1a... Bottom plate ld of casing... Top plate 1e... Recess 2... Ball 7... X direction rotary encoder 8... Y direction rotary encoder 25... Key Matrix circuit 26...Key encoder circuit D...Display device P...Cursor T1...Numeric keypad M...Coordinate input device Applicant Techno Media Complex Co., Ltd. Applicant Techno Bictuonics Co., Ltd. Agent Patent attorney Tsutomu Sugitani Figure 1 Figure 2

Claims (2)

[Claims] (1) A casing, a ball rotatably installed in the casing with a portion protruding downward from the bottom plate of the casing, and a ball installed in the casing that corresponds to the amount of rotation and rolling direction of the ball. The coordinate input device includes an X-direction rotary encoder and a Y-direction rotary encoder that output displacement signals and direction signals, and the coordinate input device is provided with a numeric keypad provided on the casing and for instructing numerical display on the screen of the display device. Characteristic coordinate input device. (2) The coordinate input device according to claim (1), wherein the numeric keypad is provided in a recess formed in the top plate of the casing.