JPS6120481Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an electronic scale that displays a desired length position by electronic display means.

[Prior art and its problems]

An electronic scale in which a numerical value representing the length to be measured is input and the length is displayed is conventionally known, for example, in Japanese Utility Model Application Publication No. 54-33749.

However, in the conventional electronic scale described above, transparent electrodes for liquid crystal display are arranged at predetermined intervals, and the transparent electrodes are selected according to numerical data input by key or numerical data obtained by calculation. It is driven and displayed.

However, in such conventional electronic scales, line segments are drawn based on the scale displayed on the liquid crystal display and used as a ruler. However, since a liquid crystal display device is made by injecting liquid crystal between two transparent substrates such as glass, it is not possible to install this liquid crystal display device directly on the side of the electronic scale body. However, using this as a ruler is difficult from the viewpoint of mounting the liquid crystal display device and protecting it from external forces.Furthermore, since the viewing angle of the liquid crystal display device is limited, it is difficult to read details such as mm units. There were also drawbacks.

[Purpose of invention]

The present invention has been made in view of the above points, and provides an electronic scale in which a display device having a large number of scale display electrodes is attached to the electronic scale body, and the display device can be effectively used as a ruler. The purpose is to

[Key points of the idea]

In the present invention, scales are printed at predetermined intervals on the upper side of the electronic scale body in the longitudinal direction, and a display device is provided in which electrodes for displaying the scales are arranged opposite to the scales.

[Example of idea]

Hereinafter, one embodiment of the present invention will be described in detail. In Fig. 1, reference numeral 1 denotes the electronic scale main body of the present invention, and a slope 2 having an appropriate angle with respect to the bottom surface is formed on one side in the longitudinal direction of the main body 1. Scales 3 are formed by printing or the like at intervals of 1 (mm) throughout. A display section 6 consisting of a liquid crystal display device 5 is formed at a position close to the scale 3 of the upper case 4 connected to the slope 2, and the upper case 4 faces the scale 3 with the display section 6 in between. On the top, numbers 7 indicating the length are formed by printing or the like in 1 (cm) increments corresponding to each scale 3. Also, upper case 4
Power switch 8 on top, measurement mode "SCA"
and mode switch 9 to specify the division mode "div", decimal point key and numeric keypad 10, "AC" key 1
1, a key input section 17 consisting of a "div" key 12, a "cm" key 13, a "" key 14, a "" key 16, and a "STOP" key 17 is formed.

The liquid crystal display device 5 has an electrode configuration as shown in FIG. 2, with 151 scale display rod-shaped electrodes 18 for marks at positions corresponding to the respective scales 3, and length scale display electrodes 18 at the lower right portion of the figure. A segment electrode 19 that displays numeric values, a character electrode 20 that represents the unit "cm", and a character electrode 2 that represents the division mode "div".
1 are formed respectively, and predetermined wiring is provided so as to be selectively driven and displayed by a circuit operation to be described later.

Next, the circuit configuration of the scale 1 will be explained. In FIG. 3, reference numeral 22 denotes a control section, which controls the arithmetic/storage section 23 according to key input data and key operation signals given from the key input section 17, and also sends a reset signal R, an addition signal U, and a subtraction signal to the counter 24. Outputs signal D and stop signal S. Further, 25 is a timing signal generation circuit which supplies a timing signal to each circuit, and supplies the counter 24 with a pulse signal 1 having a period of, for example, 0.5 seconds. This counter 24 is a 150-decimal up-down counter, and while the addition signal U is input from the control section 22, the addition operation is performed using the pulse signal 1 as the clock.
Similarly, while the subtraction signal D is input, the subtraction operation is performed, and when the stop signal S is input, these counting operations are stopped. Further, the calculation/storage section 23 performs predetermined calculations and storage on the count contents of the counter 24 and the key input data, and the results are sent to the decoder 26 as display data. This display data is decoded by the decoder 26 and sent to the liquid crystal drive circuit 27, and predetermined electrodes of the liquid crystal display device 5 are selectively driven.

Next, the operation of this embodiment configured as described above will be explained. First, when the mode switch 9 is in the measurement mode in the key input section 17 and the power switch 8 is turned on, a reset signal R is sent from the control section 22 to the counter 24, and the contents of the counter 24 are reset to "0". becomes. The contents of this counter 24 are stored in the arithmetic/storage unit 23, then sent to the decoder 26, decoded, and provided to the liquid crystal drive circuit 27. Then, predetermined electrodes of the liquid crystal display device 5 are selectively driven by the liquid crystal drive circuit 27. That is, in this case, the leftmost rod-shaped electrode 18 in the liquid crystal display device 5 is selectively driven, a mark is displayed at the 0 (cm) position of the scale 3, and the segment electrode 19 and the character electrode 2 are
0 will display "0.0cm". Note that the rod-shaped electrode 18 at the left end always continues to be displayed while the power switch 8 is in the on state.

Therefore, when measuring the length of an object to be measured (not shown) using this electronic scale 1, align the left end of the object to be measured at the 0 (cm) position on the scale 3,
Operate the "" key 15. At this time, the control section 2
The addition signal U is applied from 2 to the counter 24, and the counter 24 performs an addition operation using the pulse signal 1 having a period of 0.5 seconds as a clock, and the contents of the count are sequentially stored in the calculation/storage section 23. This stored content is then decoded by the decoder 26 and sent to the liquid crystal drive circuit 27, where it is sent to the liquid crystal display device 5.
is given a predetermined drive signal. That is, in the liquid crystal display device 5, the rod-shaped electrodes 18 are sequentially driven according to the count contents of the counter 24, and the display section 6 shows a signal similar to the period of the pulse signal 1.
The mark is displayed sequentially, moving to the right from the 0 (cm) position every 0.5 seconds. Next, the operator operates the "STOP" key 16 when this mark reaches the right end position of the object to be measured. Then, a stop signal S is given to the counter 24 from the control section 22 to stop the counting operation, and a mark is displayed on the display section 6 at the right end position of the object to be measured as shown in FIG. 4a. On the other hand, the count of the counter 24 is displayed as a numerical value on the display section 6, and in this case, "10.0 cm", which is the length of the object to be measured, is displayed. Further, in order to continue measuring an object to be measured whose length is shorter than the above-mentioned object to be measured from the display state shown in FIG. Then, the subtraction signal D is applied to the counter 24 from the control section 22, and the counter 24 performs a subtraction operation using the pulse signal 1 as a clock. Therefore, in this case, the mark will move to the left and be displayed in sequence on the display section 6, and the operator will press the "STOP" key 16 when this mark reaches the right end position of the object to be measured.
All you have to do is operate. In this way, the key input section 17
By setting the mode switch 9 to measurement mode and operating the "" key 15, "" key 14, and "STOP" key 16 as appropriate, the desired length position is indicated by a mark display, and the length is displayed as a numerical value. It is something that will be done.

Next, the function when the mode switch 9 is set to the split mode in the key input section 17 will be explained. For example, when dividing a 12 (cm) line segment into 10 to create a table, the mode switch 9 is set to division mode. At this time, the character electrode 21 is selectively driven in the liquid crystal display device 5 and "div" is displayed. However, numeric keypad 10, "cm" key 13,
When the keys 1, 2, cm, and 2 are operated using the ``'' key 15, the control unit 22 sends a control signal to the calculation/storage unit 23 based on these key operation signals, and the calculation/storage unit 23 Numerical data "12"
is memorized. This numerical data is then decoded by the decoder 26, and its output is sent to the liquid crystal drive circuit 27. The liquid crystal drive circuit 27 sends a predetermined drive signal to the liquid crystal display device 5, and the rod-shaped electrodes 18 at the 0 (cm) and 12 (cm) positions of the scale 3 are selectively driven and displayed as marks on the liquid crystal display device 5. . Then, use the numeric keypad 10 and the "div" key 12 to enter "1" and "0" to divide into 10 parts.
When the "div" key is operated, the calculation/storage unit 23
A predetermined calculation is performed on the numerical data "12" stored in and the numerical data "10" input by the current key operation. That is, the numerical data “12”
The respective values obtained by dividing into 10 and adding them are "1.2", "2.4",
"3.6"..."10.8" are calculated, and these calculation results are sent to the decoder 26. Thereafter, similar operations are performed, and the display state on the display section 6 is as shown in FIG. 4b.
As shown in the above scale 3, 0 (cm), 1.2 (cm), 2.4
(cm), 3.6 (cm)...10.8 (cm), 12 (cm) marks are displayed. Note that these displays are displayed until the "AC" key 11 is operated on the key input section 17.

Furthermore, instead of dividing a certain line segment into equal parts as described above, a case will be explained in which the line segment is divided into different lengths. For example, a line segment with a length of 15 (cm) is divided into three parts with a length of 2 (cm) from the starting point to 6 (cm), and the remaining 9 (cm) is divided into three parts with a length of 3 (cm). To do so, first enter "6", "cm" and "" in the key input section 17.
``3'' Perform the ``div'' key operation. Then, the same operation as described above is performed, and marks are displayed on the liquid crystal display device 5 at the positions of 0 (cm), 2 (cm), 4 (cm), and 6 (cm) of the scale 3, respectively. Furthermore, “9”,
When you perform key operations such as "cm", "3", and "div",
Divided display is performed starting from the 6 (cm) position of the scale 3, and the display state on the display section 6 is 6 (cm) from the 0 (cm) position of the scale 3 as shown in FIG.
(cm) position is divided into three 2 (cm) lengths, and from 6 (cm) position to 15 (cm) position is marked at each position divided into 3 (cm) lengths. is displayed.

In this way, when the mode switch 8 is set to the division mode, a line segment of a predetermined length can be divided into equal parts by any numerical value, or the positions of divisions by any length can be marked, respectively, by the above-mentioned key operations. It is also possible to display marks sequentially at positions of a specified length.

In the above embodiment, the mark was moved left and right by key operation, but the mark may be moved left and right by operation of a two-contact switch such as a slide switch or a lever switch.

Further, in the above embodiment, the pulse signal 1 with a period of 0.5 seconds is used as the clock for the counter 24, and the display section 6
Although the mark displayed in is moved left and right every 0.5 seconds, the present invention is not limited to this, and it is sufficient that the mark is moved and displayed at a speed that is easy for the operator to recognize. Furthermore, in this case, in addition to displaying the mark only at the desired length position,
All marks from the 0 (cm) position to the desired length position may be displayed.

Furthermore, in the above embodiment, the scale 3 is set to the upper case 4.
Although it is formed on the display section 6, it may be formed on the display section 6 by printing or the like.

In addition, although the liquid crystal display device 5 is used as the display section 6 in the above embodiment, the desired length position may be displayed using other electronic display means such as a light emitting diode or an electrochromic display device. good.

Further, the shape of the mark, the overall length of the scale, and the shape of the electronic scale 1 in the above embodiments are not limited to the shapes shown in the drawings, and can be changed in various ways without departing from the gist of the present invention.

[Effect of idea]

As described above, according to the present invention, since the structure has a structure that also serves as a display device in which a printed scale and scale display electrodes are arranged opposite to the scale, it is not necessary to attach the display device to the electronic scale body. It does not need to be installed facing the side of the screen, and the mounting location can be selected arbitrarily. For example, the printed scale can fully eliminate the difficulty of reading due to the viewing angle when using a liquid crystal display, and the printed scale can be easily viewed over the details. It can be read accurately.

[Brief explanation of the drawing]

FIG. 1 is an external view of an embodiment of the present invention, and FIG. 2 is a diagram showing the electrode configuration of a liquid crystal display device 5 of the same embodiment.
FIG. 3 is a block diagram showing the circuit configuration of the same embodiment, and FIGS. 4a, b, and c are state diagrams for explaining the functions of the same embodiment. DESCRIPTION OF SYMBOLS 1... Electronic scale, 3... Scale, 5... Liquid crystal display device, 6... Display section, 9... Mode switch, 17... Key input section, 18... Rod-shaped electrode, 2
2...Control unit, 23...Calculation/storage unit, 24...
Counter, 25...Timing signal generation circuit, 2
6...Decoder, 27...Liquid crystal drive circuit.

Claims (1)

[Scope of utility model registration request] In an electronic scale that displays the length of input numerical data or calculated numerical data on a scale, scales formed at predetermined intervals on the side of the upper surface in the longitudinal direction of the electronic scale body;
An electronic scale comprising a display device in which scale display electrodes are arranged opposite to the scale.