JPH02139298A - Adjustable parallel ruler device - Google Patents

Abstract

PURPOSE:To enable a marked enhancement of the commercial value of an adjustable parallel ruler device by supplying a voltage stably over a long time to electronic apparatuses and circuit elements for digital displaying of rotating angles of straight edges, without connection to an external power supply. CONSTITUTION:Variations in the angle of a straight edge 22 or 24 relative to a base line are digitally displayed on a liquid crystal display device 28 provided on a top cover for a head 16. A force in an arbitrary direction parallel to the surface of a drawing board 4 is applied to the head 16, whereby the head 16 and the straight edges 22, 24 are moved to arbitrary positions on the drawing board 4 through a movement of an X cursor 6 along an X rail 2 and a movement of a Y cursor 12 along a Y rail 8. When light from a lamp or the sun is incident on a light-receiving surface of a photoelectromotive force element 126, a photoelectromotive force is generated in the element 126, whereby a constantly stable predetermined voltage is supplied to a battery 152, and electric power is supplied to circuit elements, electronic apparatus, the display part 28, an encoder and the like from the thus charged battery 152.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a universal parallel ruler device that digitally displays the amount of rotation angle of a straight edge.

The main purpose of the present invention is to permanently operate the electronic equipment in the device for a long period of time without using an external power source.

A rail-type flexible parallel ruler device is generally attached to a diagram supported on a drafting table.

When displaying the amount of movement of the straightedge along the X-Y rail as a digital quantity, various electronic devices and circuit elements are attached to the apparatus. When an external power source is used as a power source for the electronic equipment and elements, it is necessary to connect the external power source and the device with an electrical cord. In this case, in a design room with many drafting tables, electrical cords get in the way.
Also, a large number of electrical outlets must be provided. Depending on where the drafting table is placed, extremely long electrical cords may be required.

Also, if you use batteries without using an external power source,
Because the battery life is short, replacing the battery is a hassle.
Furthermore, if the pressure of the battery decreases due to long-term use, errors will occur in the operation of electronic devices and elements, and digital display will not be accurate. It provides:

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be explained in detail below by referring to an embodiment shown in the accompanying drawings.

In FIG. 1, reference numeral 4 denotes a drawing board supported on a drafting table (not shown), an X rail 2 is fixed to the upper edge of this board, and an are connected so that they can move freely along the 8 is a Y rail, one end of which is connected to the Y cursor 6 so as to be rotatable within a plane perpendicular to the 4th surface of the drawing board. A foot grounder 10 is rotatably attached to the other end of the Y rail 8.

The continuous rollers 10 are placed on the 4th surface of the drawing board.

12 is a Y cursor attached to the Y rail 8 so as to be movable along its longitudinal direction;
by the hinge connection mechanism 14.

A support member 18 of the head 16 is connected. Straight rulers 22 and 24 are removably fixed to a ruler mounting plate 20, which is one of the components of the head 16. The head 1
By manually rotating the handle member 26, which is one of the components of 6, the ruler mounting plate 20 can be rotated about the handle member 26 in a plane parallel to the drawing board 4 surface. can. By rotating the ruler mounting plate 20, the angle of the straight ruler 22 or 24 with respect to the base line can be changed. The amount of change in the angle of the straightedge 22 or 24 with respect to the base line is digitally displayed on a display 28 made of liquid crystal provided on the top cover of the head 16.

Note that the base line means a straight line parallel to the straightedge 22 or 24 when the display 28 is at zero. The display section 28 has a liquid crystal as its main component, but a light emitting diode, a display tube, etc. may also be used. If you hold the handle member 26 of the head 16 with your hand and apply force to the head 16 in any direction parallel to the 4th surface of the drawing board, you can move the X cursor 6 along the X rail 2 and move the Y cursor 12. The head 16 and straightedges 22, 24 are moved to arbitrary positions on the drawing board 4 by the movement along the Y rail 8.

Next, the structure of the head 16 will be explained with reference to FIG.

14 is a hinge connection mechanism, one of which has a connection member 15 rotatably supported by the Y cursor 12;
A head support member 18 is connected to the other end of the head support member 5 . 26
is a handle member, and four rechargeable batteries 152 are housed in a housing formed in an internal cavity of the handle member 6. Members 32 and 34 are fixed to the handle member 26 with screws. ing. 54 is a main shaft, which is fixed to the member 34 with a screw. A ring 58 is fitted onto the outer peripheral surface of the main shaft 54, and a disk 60 is rotatably fitted onto the outer peripheral surface of the ring 58. Said board 60
The collar portion is fixed to the fixing plate 62 with screws. An ABLUTE encoder plate 64 is fixed to the lower surface of the fixed plate 62. The fixing plate 62 is fixed to the head support member 18. The mounting plate 20 is attached to the main shaft 5
It is fixed at 4. An angle fixing device for removably fixing the member 34 to the fixing plate 62 at a desired angle, an indexing device for detachably fixing the ruler mounting plate 20 to the board 60 at predetermined angles, and other functions necessary for a drafting machine. The head 16 is provided with various mechanisms to accomplish this.

Next, the absolute encoder will be explained.

On the outer periphery of the synthetic resin encoder plate 64, a slit section 88 (light transmitting section) is formed by printing to display the angle of the straightedge in 13-bit binary coded decimal notation in units of 5 seconds. Therefore, the slit portion 88
4 in the circumferential direction, 13 rows (10 rows are shown in the drawing,
(others omitted) are formed in large numbers along the trajectory. 90 is an IC board fixed to the ruler mounting plate 2o, and a support frame 92 is fixed to this. At the upper part of the recessed part of the support frame 92, there are 13
A number of light emitting elements 94 are attached in a line in the radial direction of the encoder plate 64, and 13 phototransistors, that is, light receiving elements 96 are attached to the lower part of the recessed part, corresponding to the 13 rows of slit parts 88. They are arranged in a line in the radial direction of the encoder plate 64. The light receiving element 96 and the light emitting element 94 are fixed to ceramic substrates 98 and 100, respectively, and acrylic semicylindrical lenses 102 and 104 are fixed to the substrates 98 and 100, respectively. The light emitted from one light emitting element 94 passes only through the slit portion 88 of the corresponding track due to the action of the lens 104, and the light that has passed through the slit portion 88 of the track corresponding to the light emitting element 94 passes through the one light emitting element 94 facing the light emitting element 94 due to the action of the lens 102. The light is focused only on one light receiving element 96. Note that the 13 phototransistors 96 do not have to be arranged in a line along the radial direction of the encoder plate 64, and the positions of the respective phototransistors may be shifted in the circumferential direction of the encoder plate 64.

Note that when the minimum unit of angle display is 10 seconds, the number of phototransistors may be 12.

Reference numeral 106 denotes an upper cover fixed to the ruler mounting plate 20, on which a display lens 108 is disposed, and below the display lens 108, a display section 28 is disposed.

In FIGS. 8 to 12, reference numeral 22 is a horizontal straight ruler made of a transparent synthetic resin plate, and a recessed portion 120 is formed over a wide range on the lower surface thereof.

122 is an insulating substrate, on which a rectangular copper foil 124 is attached.
A large number of these are pasted at appropriate intervals.

A photovoltaic element 126 made of silicon crystal is fixed to the upper surface of the copper foil 124 with an appropriate space 128 on one side of the upper surface of the copper foil 124 .

Reference numerals 130 and 132 are conductive paths made of a conductive material formed by coating on the insulating substrate 122, and one end of the conductive path 130 is connected to the eighth
In the figure, it is electrically connected to the space 128 of the copper foil 124 at the right end by a conductive wire. The other end of the conductive path 130 is connected to a negative terminal of a voltage regulator 134 fixed to the insulating substrate 122. One end of the conductive path 132 is shown in FIG.

It is electrically connected to the upper surface of the leftmost photovoltaic element 126 by a conductive wire. The other end of the conductive path 132 is connected to the positive terminal of the regulator 134.

A light emitting diode (charge indicator) 136 and a resistive element 138 are connected between the conductive paths 130 and 132 by electric wires as shown. 140 is a backflow preventer made of a diode fixed to the insulating substrate 122, and its cathode side is connected to the positive terminal of the voltage regulator 134 by an electric wire. In each of the photovoltaic elements 126, in FIG. 8, the space 128 of the copper foil 124 on the left side is electrically connected to the upper surface of the adjacent photovoltaic element 126 on the right side. The insulating substrate 122 is fixed to the recess 120 with the light-receiving surface of the photovoltaic element 138 facing upward. 142
．． 144 is a pin member fixed to the left end of the horizontal straight ruler 22, and the pins 142 and 144 constitute a plug. Pin 142 is connected to the diode 1 by conductor ftIMc.
40 , and pin 144 is connected to the negative terminal of voltage regulator 134 . 146,1
48 is a plug socket fixed to the ruler mounting plate 20, and the sockets 146, 148 are connected to the rechargeable battery 152 by an electric cord 150. The pins 142, 144 are fitted into the sockets 146, 148.

FIG. 9 is a block diagram illustrating the information processing circuit of this device.

In the figure, 110 is an absolute encoder whose main components include an encoder plate 64, a light emitting element 94, and a light receiving element 96. In the case of the absolute method, the code on the encoder plate 64 is a unit distance code that always has only a 1-bit change when compared with the signals before and after itself, so as to avoid errors between adjacent positions. We are hiring. Therefore, this unit distance code is converted by a code conversion circuit 114 into a code that can be easily calculated by the next subtraction circuit 112, for example, a BCD code. Unit distance code and BCD
An example of the code is as follows.

116 is a preset section, which can be set to B by manual operation.
It is configured to be able to input a CD code signal, and has a flip-flop circuit as its main component. 118 is a display unit drive control circuit, and 28 is a display unit, which is composed of a 7-segment numerical display circuit using liquid crystal.

The circuit elements and electronic equipment are arranged on the substrate 9o.
The encoder 110 and the like are configured to be supplied with power from a rechargeable battery 152.

Next, the operation of this embodiment will be explained.

When the light receiving surface of the photovoltaic element 126 is irradiated with an electric light installed in a design room or the like or with sunlight, an electromotive force is generated in the element 126, and the upper surface of the element 126 is charged positively and the lower surface is charged negatively. do. The negative voltage of element 126 is applied to pin 142 via voltage regulator 134 . The positive voltage of photovoltaic element 126 is applied to pin 144 via voltage regulator 134 . pin 142
The voltage applied to ゜144 is the voltage applied to plug socket 146゜1.
48 and an electrical cord, the voltage is applied to a rechargeable battery 152 to charge the battery 152. The voltage of the photovoltaic element 126 is applied to a charge indicator 136 through a resistive element, and the indicator 136 emits light to indicate the state of charge. The voltage regulator 134 receives the voltage supplied from the group of photovoltaic elements 126 and controls it to a predetermined level, prevents excessively high voltage from being supplied to the rechargeable battery 152, and always maintains a stable predetermined voltage. is supplied to the battery 152.

If the voltage regulator 134 does not properly control the voltage, the rechargeable battery 152 and other circuit blocks will be destroyed.

Next, a case will be described in which the amount of rotation of the straightedge 22 is digitally displayed on the display section 28.

First, release the fixation of the ruler mounting plate 20 to the panel 6o,
When the handle member 26 is gripped by hand and rotated, the main shaft tube 54 rotates, and in conjunction with this, the ruler mounting plate 20 and the straight edge 22, 24 rotate.

In conjunction with the rotation of the straightedges 22 and 24, the light receiving element 96 and the light emitting element 94 move along the absolute encoder plate 64, and the encoder 110 generates a digital signal corresponding to the rotation angle of the straightedge 22, that is, a unit distance. Outputs code signal.

This code signal is converted into BCD by the code conversion circuit 114.
The BCD code signal A is converted into a code signal, and the BCD code signal A is input to the subtraction circuit 112. On the other hand, the BCD code output signal B output from the preset section 116 is input to the subtraction circuit 112 and held therein. The subtraction circuit 112 performs the calculation A-B=C, and this BCD code output signal C is input to the display unit drive control circuit 118, where decoding and necessary control operations are performed and finally the display unit At 28, the output of the subtraction circuit 112 is displayed as a decimal value. In this case, if the value B of the preset section 116 is set to zero and this is input to the subtraction circuit 112, then C=
A, and the value detected by the encoder 110 is displayed on the display unit 28 as it is. Furthermore, if it is desired to set a certain angle of the straightedge 22 to zero, that angle may be set in the preset section 116 and input to the subtraction circuit 112. For example, if B=30°, A=30°
At the position, C=30-30=O, and the display section 28
will be displayed as zero, and even at other angles,
The value obtained by subtracting 30 from the detected value will always be displayed. Similarly, if B=-15°, at the position of A=-15', C=-15-(-15)=-15+15
=O, and zero will be displayed on the display section, and at other angles, the detected value plus 15 will always be displayed.

Note that various modifications are possible in implementing the present invention as described above. That is, the present device is not particularly limited to a rail type in which the head 16 is guided and supported by the XY rails 2 and 8. Furthermore, although the encoder 110 is built inside the head 16, it can be placed at a suitable location outside the head 16.

In addition, the display section 28 that displays the angle of the straightedge is connected to the head 16.
It is not particularly limited to being provided in. Furthermore, the rechargeable battery can be placed in any suitable location other than the handle member 26.

Even if the present invention is modified as described above, it is possible to achieve the intended purpose of the present invention.

Next, another embodiment of the photovoltaic element placement mechanism will be described with reference to FIGS. 13 and 14.

160 is a handle member of the head, and the handle member 160 is provided with a cap 162 made of a transparent insulating material. An insulating substrate 164 is fixed to the lower surface of the cap 162. A fan-shaped copper foil 16 is provided on the insulating substrate 164.
A fan-shaped photovoltaic element 170 is fixed to the copper foil 166 with a space 168 therebetween, with its light-receiving surface facing upward. Photovoltaic element 1
The 70th group is arranged in a recess formed on the lower surface of the cap 162. The insulating substrate 164 is provided with a voltage regulator, a charging indicator, and a backflow preventer as in the first embodiment. The output voltage of the voltage regulator is connected by a rechargeable battery located within the handle 160. The wiring state between the photovoltaic elements 170 is the same as in the first embodiment.

Next, another embodiment of the photovoltaic element placement mechanism will be described with reference to FIGS. 15 and 16.

172 is a ruler mounting plate, and the insulating substrate 1 is attached to the exposed surface of this plate.
A copper foil 176, a photovoltaic element 178, and necessary circuit elements are fixed to the insulating substrate 174. A cover 180 made of a transparent material is removably fitted onto the ruler mounting plate 172, and a photovoltaic element 178 is disposed below the flat plate of the cover 180 to protect its light-receiving surface. The voltage generated by the photovoltaic element 178 is
An electrical cord supplies a rechargeable battery in the handle via a voltage regulator.

Next, another embodiment of the photovoltaic element placement mechanism will be described with reference to FIGS. 17 and 18.

Reference numeral 182 designates an upper surface cover of the head. An insulating substrate 184 is fixed to the upper surface of this cover, and a large number of copper foils 186, photovoltaic elements 188, and necessary circuit elements are attached to the insulating substrate 184. 190 is a transparent cover plate, and the cover 1
82 and is fixed at an appropriate distance from the upper surface thereof. The output end of the voltage regulator mounted on the insulating substrate 184 is connected via an electrical cord to a rechargeable battery housed within the handle member of the head.

Next, another embodiment of the photovoltaic element placement mechanism will be described with reference to FIGS. 19 and 20.

Reference numeral 192 denotes a connecting plate constituting the hinge connecting mechanism 194, and an insulating substrate 196 is fixed to the upper surface of this connecting plate.

A plurality of copper foils 198 are fixed to the upper surface of the insulating substrate 196, and a photovoltaic element 200 is fixed to the copper foils.

A voltage regulator and other circuit elements are arranged on the insulating substrate 196.

Reference numeral 202 denotes a transparent lid, which is fitted and fixed to the connecting plate 192, and the photovoltaic element 200 is placed inside the lid plate 202.
The group is arranged. The output of the voltage regulator is connected by a cord 204 to a rechargeable battery contained within the handle member 208 of the head 206.

Next, another embodiment of the photovoltaic element placement mechanism will be described with reference to FIGS. 21 to 29.

Reference numeral 210 designates a Y-rail, on the top surface of which a groove 212 is formed extending over approximately the entire length in the longitudinal direction, a long insulating substrate 214 is fixed to the bottom surface of the groove 212, and the insulating substrate 2
A large number of copper foils 216 are fixed in a line along the longitudinal direction of the Y rail 210 on the upper surface of the Y rail 210 at predetermined intervals.

218 is a cover member detachably fixed to the end of the Y rail 210, and recesses 220, 22 are formed on the inner wall surface of this cover member.
2, 224 and 226 are formed.

Contact pieces 228° 230 are provided on the bottom surfaces of the recesses 222 and 224.
is screwed on. Curved portions 232, 234 and 236, 238 are formed at each end of the contact pieces 228, 230. 240 and 242 are conductive parts fixed to one end of the insulating substrate 214, the negative end of an electromotive part made up of a group of photovoltaic elements 244 is connected to the conductive part 240; The positive ends of the parts are connected.

The conductive part 240 is connected to the insulating substrate 2 through the through hole 246.
14, and the contact piece 2 is connected to the conductive part on the lower surface of the conductive part.
One curved portion 236 of 30 is in elastic contact. Conductive part 2
Similarly, 42 is connected to the insulating substrate 214 by a through hole.
It is connected to a conductive part on the lower surface, and one curved part 232 of the contact piece 228 is in elastic contact with the conductive part. 248 is a T formed on the side of the Y rail 210 over the entire length in the longitudinal direction.
A rail groove is formed on the wall surface of the T groove 248,
A long insulating substrate 250 is press-fitted into the rail groove. On one side of the insulating substrate 214, there are two
The conductive portions 252 and 254 are formed by coating. One end of the insulating substrate 250 slightly protrudes from the end of the Y rail 210, and the protruding portion is connected to the recess 226 of the cover member 218.
Located within. Short conductive parts 256 and 258 are formed on the other surface of the protruding portion of the insulating substrate 250, the conductive part 256 is electrically connected to the conductive part 254 by a through hole, and the conductive part 258 is connected to the conductive part 25 by a through hole.
It is electrically connected to 2. The curved portion 238 of the contact piece 230 is in elastic contact with the conductive portion 256 , and the conductive portion 258
The curved portion 234 of the contact piece 228 is in elastic contact with the contact piece 228 . A positive voltage from an electromotive portion is applied to the conductive portions 256 and 254, and a positive voltage from an electromotive portion is applied to the conductive portions 258 and 252. A Y cursor 260 is attached to the Y rail 210 via rollers so as to be movable along the Y rail 210. A rising portion is formed on the Y cursor 260, and a brush stand 262 is fixed to this. A pair of brushes 264, 2 fixed to the brush stand 262
66 is in elastic contact with the conductive portions 254 and 252. The brushes 264, 266 are electrically connected via an electrical cord 268 to a rechargeable battery disposed within the handle member of the head. Note that a voltage regulator is disposed at a suitable position between the brushes 264, 266 and the rechargeable battery, and a backflow preventer for preventing voltage from flowing backward from the rechargeable battery to the voltage regulator is disposed at a suitable position within the handle member. has been done. Note that the voltage regulator and backflow preventer are connected to the insulating substrate 214.
It may also be provided. In the above configuration, the voltage generated by the electromotive section consisting of the group of photovoltaic elements 244 is
．． 254, brushes 264, 266, and a rechargeable battery within the handle member. When the Y cursor 260 is moved along the Y rail 210, the brushes 264 and 266 move along the longitudinal direction of the insulating substrate 250 while being connected to the conductive parts 252 and 254. The insulating substrate 250, the conductive parts 252, 254, and the brushes 264, 266 constitute a sliding device.

Next, another embodiment of the photovoltaic element arrangement mechanism will be described with reference to FIG. 30.

270 is the X rail 27 at the rising part of the X cursor 274
4, and a bracket 276 is fixed to this member. One end of a Y rail 278 is fixed to the rising portion of the bracket 276. 280 is bracket 2
76 is an insulating substrate fixed to the upper surface of the copper foil 2.
82 is fixed, and a photovoltaic element 284 is fixed to each of the copper foils 282. The insulating substrate 280 includes:
A voltage regulator, backflow preventer, and charge indicator are attached, and these elements constitute a photovoltaic section on the top surface of the bracket 276. A transparent cover 286 fits over the bracket 276 and protects the photovoltaic portion.

A sliding device is provided between the Y rail 278 and the Y cursor. The output voltage of the photovoltaic section on the top surface of the bracket 276 is supplied to the rechargeable battery on the Herad side via those sliding devices.

Next, another embodiment of the photovoltaic element placement mechanism will be described with reference to FIG. 31.

Reference numeral 290 denotes an X-rail, on the top surface of which an insulating substrate is fixed, and a large number of copper foils are fixed to the insulating substrate. A voltage regulator, backflow preventer, and charging indicator are arranged on the insulating substrate, and these constitute a photovoltaic section, which is protected by a transparent cover. The output voltage of the photovoltaic section is
Power is supplied to the rechargeable battery of the head by a sliding device provided between the rail 290 and the X cursor 294 and a sliding device provided between the Y rail 296 and the Y cursor 298.

Next, another embodiment of the photovoltaic element placement mechanism will be described with reference to FIGS. 32 and 33.

Reference numeral 300 denotes a Y cursor, on which a support plate 304 is integrally formed to be positioned on the side of the Y rail 302, an insulating substrate 306 is fixed to the support plate 304, and the insulating substrate 3
06 is attached with a copper foil 308, a photovoltaic element 310, a voltage regulator, a charging indicator, and a backflow preventer, which constitute a photovoltaic section. A transparent cover 312 is fitted onto the support plate 318. The output voltage of the photovoltaic section is supplied to a rechargeable battery on the head side via an electric wire cord.

Next, an embodiment of the photovoltaic element placement mechanism will be described with reference to FIG. 34.

Reference numeral 314 denotes an X cursor, and a support plate 318 is integrally formed with this, positioned on the upper surface of the X rail 316. An insulating substrate 320 is fixed to the support plate 318, and a copper foil 322, a photovoltaic element 324, a voltage regulator, a charging indicator, and a backflow preventer are attached to the insulating substrate 320.
These constitute the light device type part. 326 is the support plate 31
It is a transparent cover that fits on the 8 and protects the light device mold part.

The output voltage of the photovoltaic section is supplied to a rechargeable battery of the head via a sliding device.

Next, another embodiment of the photovoltaic element placement mechanism will be described with reference to FIGS. 35 and 36.

330 is a drawing board to which an X rail 348 is fixed by a vise-type fixture 334.

Reference numeral 336 is a recess formed along the edge of the upper surface of the drawing plate 330, and an insulating substrate is fixed to the bottom surface of the recessed portion, and a photovoltaic portion 338 is disposed on the insulating edge substrate.

340 is a transparent cover arranged to cover the upper surface of the photovoltaic section 338, and the side wall of the cover 340 is screwed to the side surface of the drawing board 330. An electric wire passage is formed in the side wall of the cover 340, and the output end of the photovoltaic section 338 is connected to an outlet 342 fixed to the lower surface of the drawing board 330 through the electric wire. 344 is an electrical cord, one end of which is connected to the output end of the photovoltaic section 338 via a plug 346, and the other end of the cord 344 is connected to the X rail 34.
Connected to the 8 side. The output voltage of the photovoltaic section 338 is determined by the electrical cord 344, the sliding device provided between the X rail 348 and the X cursor 350, and the sliding device provided between the Y rail 352 and the Y cursor. The voltage is then applied to the rechargeable battery on the head side.

Since the present invention is configured as described above, voltage can be stably supplied for a long period of time to electronic equipment and circuit elements for digitally displaying the amount of rotation angle of a straightedge without connecting an electric cord to an external power source. This has the effect of dramatically increasing the commercial value of the universal parallel ruler device.

[Brief explanation of the drawing]

The figures show preferred embodiments of the present invention, in which Fig. 1 is an overall plan view, Fig. 2 is a sectional view of the head, and Fig. 3 is a plan view of the head.
Fig. 4 is a sectional view of the encoder, Fig. 5 is a plan view of the encoder plate, Fig. 6 is an external view of the encoder, Fig. 7 is a block diagram of the electronic circuit of this device, Fig. 8 is a plan view of the straightedge, 9th
The figure is the same side view, Figure 10 is an explanatory diagram of the photovoltaic element,
1 is an explanatory diagram of the same, FIG. 12 is a partial plan view, FIG. 13 is a sectional view showing another embodiment, FIG. 14 is a plan view of the same, and FIG.
The figure is a plan view showing another embodiment, FIG. 16 is a sectional view of the same, FIG. 17 is a plan view of another embodiment, FIG. 18 is a sectional view of the same, and FIG. 19 is a sectional view of another embodiment. A plan view, FIG. 20 is a sectional view, FIG. 21 is a plan view showing another embodiment, FIG. 22 is a sectional view, FIG. 23 is a sectional view, and FIG. 24 is an external view.
Fig. 25 is a side view, Fig. 26 is a front view, Fig. 27 is an external view, Fig. 28 is an external view, Fig. 29 is a front view,
Fig. 30 is a side view showing another embodiment, Fig. 31 is a plan view showing Kazuya's embodiment, Fig. 32 is a plan view showing another embodiment, Fig. 33 is a sectional view of the same, and Fig. 34 is a plan view showing another embodiment. The figure is a side view showing another embodiment, FIG. 35 is a plan view showing another embodiment, and FIG. 36 is a side view of the same. 4... Drawing board, 2... X rail, 6... X cursor, 8... Y rail, 10... Continuous roller, 12...
Y cursor, 16... Head, 22.24... Straight ruler, 28... Display section, 152... Rechargeable battery, 122
...Insulating substrate, 124...Copper foil, 126...Photovoltaic element, 134...Voltage regulator, 140...
・Backflow preventer, 142, 144...pin, 116...
Preset section.

Claims (1)

[Claims] 1. A head that can be moved in parallel to any X-Y position on the drawing board, a straightedge rotatably attached to the head, and the head that converts the rotation angle of the straightedge into a digital coded signal. A built-in absolute encoder, a display section that digitally displays the angle value of the straight edge, a display section drive control circuit that drives and controls the display section based on the output signal of the encoder, and a position where light hits the light receiving surface. a photovoltaic element disposed in the photovoltaic element; and constant voltage control means for controlling the electromotive voltage of the photovoltaic element to a predetermined level and supplying power to the encoder and the circuit element; A flexible parallel ruler device characterized in that the head is disposed on a Y rail that guides the head in the direction of the Y coordinate axis on a drawing board.