JPS6035070B2 - display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an improved display device that is suitable for use in vending machines, etc., and particularly in which seven segments are arranged in a Japanese character shape to display desired numbers. It is related to.

Generally, vending machines are required to display the manufacturing date or storage date and time as an example of quality indication depending on the product being sold, but for this reason, the date and time can be easily changed at a low cost. equipment is required.

Conventionally, display devices equipped for this purpose include, for example, a drum with numbers 1 to 0 on its circumference corresponding to the month, day, or time, and the drum is rotated as appropriate. Therefore, the desired date and time were set.

However, such secondary display devices have drawbacks such as the high unit price of the drum, and since numbers from 1 to 0 are provided on the circumference of one drum, the size of the drum itself cannot be changed. Considering this, the numbers were not too large, making it difficult to confirm the date from outside.

Recently, with this in mind, seven segments (letter display board) with different colors on the front and back are arranged in a Japanese character shape, and by reversing each segment as appropriate, the desired number can be displayed. However, since the reversal of each segment is done manually, such work is very complicated, and there is also the possibility of making mistakes, making it less practical. There was something lacking in it.

The present invention was invented based on the drawbacks of such conventional devices, and it provides permanent magnetism with different polarity on the front and back sides of each segment, and also provides a solenoid or the like for each segment. By applying a signal to these solenoids, the segments are reversed by a magnetic field to display a desired number.

Hereinafter, one embodiment will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic front view of an automatic rice vending machine equipped with a display device according to the present invention, and the front panel 1 includes a coin slot 2, a change return slot 3, a window 4 for displaying the actual products for sale, and corresponding windows. It is provided with a selection button 5, a storage date display device 6 for sale items, and the like.

Such a display device 6 is related to the present invention, and will be described in detail below with reference to the drawings.

2 and 3 are a front view and a cross-sectional view of the main part, and 7 in the figure is a display plate fixed to the back surface of the front panel so as to close the display row' provided on the front panel 1, It is made of transparent or semi-transparent plate material.

Reference numeral 8 denotes a support plate for a character display board made of an opaque material provided on the back surface of the display board 7, and seven elongated segment holes 8a to 8g are arranged in a Japanese character shape on the board surface, and the above-mentioned A spring inserted into the adjustment bolt 9 installed upright on the back side of the front panel and wound around the bolt 9 is biased in a direction away from the river trowel display plate 7, and tightened by the adjustment nut 11 against the biasing force. It is made to be relaxed.

12a to 12g are character display boards that are reversibly pivoted to the segment holes 8a to 8b using pivot shafts 13 provided at both ends, respectively, and are displayed in white and red on the front and back, respectively, as shown in FIG. Permanent magnets are installed inside so that the colors are different and the gutter properties are N and S on the front and back sides.

Regarding the relationship between the thickness of the character display board and the support plate 8, the character display board may be made a little thinner, and depending on how tightly or loosely the self-adjusting nut 11 is tightened, the spring 10 may also resist the thickness. The support plate 8 is brought into close contact with the display plate 7, and the character display plates 12a to 12g are in a relationship that cannot rotate within the segment holes. This point will be discussed later in the section on effects. Reference numeral 14 designates a printed circuit board mounted on the back surface of the support plate 8, on which are fixed solenoids (consisting of iron cores and windings) 15a to 15g corresponding to the character display boards 12a to 12g, respectively. In this embodiment, when the solenoid is energized, the magnetic field on the side of the solenoid corresponding to the character display plate becomes the north pole.

Therefore, when each character display board 12a to 12g has its back side (S pole side) corresponding to the display board 7 side and no numbers are displayed yet, when the appropriate solenoid is energized, this On the character display board corresponding to the energized solenoid, the N pole of the character display board and the N pole of the solenoid repel each other and are reversed. The number "5" is displayed as shown in the figure. The structure of the display device according to the present invention is constructed as described above.Next, the case where the date and time is displayed using the device and the electric circuit that drives the display device will be explained.

Now, the date and time can be displayed by arranging the display devices shown in FIGS. 2 and 3 into two sets each for date and time as shown in FIG.

FIG. 6 shows a drive circuit in such a case, and in the figure, S
W, to SW9 are provided corresponding to the display numeric selection keys 16 with IG Hayabusa codes from 1 to 9 arranged on the front panel 1 or other appropriate places of the vending machine, and This is a display number selection switch that is turned ON in conjunction with the push operation, and 17 is the ON' of the display number selection switch.
The encoder converts the accompanying numerical signals of the IG Hayabusa into binary logic signals, and is made up of four OR circuits OR, to OR4. 18 is a decoder that outputs the coded signal from the encoder 17 as seven segment signals a to g indicating logical values of "1" and "0";
Consisting of a large number of NAND circuits, AND circuits, and inverter circuits, the final stage is controlled by a signal from the encoder 17 and a pulse signal from the input terminal 19 (outputted when any of the display selection switches is turned on). The segment signals a to g are output from the NAND circuit.

2. The above solenoids 15a to 1 correspond to the day and time.
This is a character display board drive circuit section consisting of four blocks A to D of 5g and date/time selection switches SW-A to SW-D provided for each block, and these date/time selection switches SW. The other ends of -A to SW-D are commonly grounded 21.

That is, the solenoid is connected to the (1) pole, and when the solenoid is energized, the side corresponding to the character display board becomes the (10) pole. Reference numeral 22 denotes a clear circuit section interposed at both ends of the character display board drive circuit section 20, and when the clear circuit section is operated, a current is applied to the circuit section 2 in the opposite direction to that above.

The drive circuit according to the present invention is composed of such components, all of which are installed on the printed circuit board 14.

Note that 23 in the circuit is an input terminal for receiving a 0 display signal into the decoder 8 when displaying "0" on each character display board. The present invention is constructed as described above,
The effect will be explained below.

By the way, in FIG. 5, 8:00 a.m. on the 25th is displayed, but the case where 5 on the 25th is displayed will be explained as an example.

Now, all the character display boards 12a to 1 in the part where 5 is displayed.
Assume that 2g has its back surface ([S-pole side surface)] facing forward.

In this state, when 6 of the display number selection keys 16 is pressed, the display number selection switch SW5 turns ○N, and based on this, the OR circuit OR of the next stage encoder 17,
Signals “1”, “0”, “1”, and “0” are output from OR4, and these are input to the next stage decoder 18 together with the pulse signal from the input terminal 19.

The decoder 8 operates based on these input signals and outputs "1", "0",
Segment signals a to g indicating logical values of "1", "1", "0", "1", and "1" are output. Therefore, since the date/time selection switch SW-B is already closed at this time, the segments signals energize the solenoids 15a, 15c, 15d, 15f, and 15g in block b corresponding to the day. The corresponding character display boards 12a, 12c, 12d, 12f, and 12g are reversed to indicate that it is the 5th day. After the character display board is inverted once in this manner, it continues to display the above-mentioned 5 days even if the power to the solenoid is cut off. Therefore, the next step is to turn off the display of the 5th day as described above, which can be done by turning on the clear circuit 22.

That is, when inverting as described above, one end of the date/time selection switch SW-B is grounded and becomes the (one) pole, so the character display board corresponding to the solenoids 15a to 15g is inverted. The (S) pole corresponds to the solenoid, and the (N) pole corresponds to the solenoid if it is not reversed, and when voltage is applied in the opposite direction from the clear circuit 22 in this state, the above reverse occurs. The object is turned over again and becomes the original blank slate. Next, regarding the case where the display content is set to 0, in this case, when a pulse signal is input through the input terminal 23, the decoder 18 outputs segment signals a to g as "1", "1", "1", "1". ”, “1”, “
1", "1", and "0" are output. For example, when the date/time selection switch SW-C is closed, the segment signal group is applied to each solenoid of the block C, and the segments are applied to the solenoids 15a to 15a. 15f, the character display boards 12a to 12f are reversed to display 0. By the way, in the present invention, the character display board is reversed as described above to display a desired number, but it is not possible to display a character of one rank. If you leave it as it is after doing so, the character display board will have segment holes (8a to 8g).
Since the character display board 7 can be rotated freely within the display board 7, if a magnet or the like is used to tamper with it from the outside of the display board 7, the character display board will rotate and display different numbers.

Therefore, in order to prevent this from happening, in the present invention, the third
The support plate 8 is tightened in the direction of the display board 7 using the adjustment nut 11 shown in the figure, so that even if the character display board tries to rotate, a part of it will hit the back surface of the display board 7, preventing it from rotating. . Since the present invention is constructed as described above, if the support plate is brought into contact with the back side of the display board, the character display board cannot be reversed, so that the predetermined numbers set are not changed inadvertently. This is an excellent invention that allows stable numerical display without any problems.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of a vending machine equipped with a display device according to the present invention, FIGS. 2 and 3 are a front view and a sectional view of a display device according to the present invention, and FIG. A diagram showing the relationship between a character display board and a solenoid constituting such a display device, FIG. 5 is a diagram showing an example of displaying date and time using the display device of the present invention, and FIG. FIG. 3 is an electrical drive circuit diagram in FIG. 7: Display board, 8: Support plate, 8a to 8g: Solenoid hole, 12a to 12g: Character display board, 15a to 15g:
solenoid. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Rudder

Claims (1)

[Claims] 1. A plurality of character display boards with different colors on the front and back sides and magnetism with different polarities are arranged in a Japanese character shape and are configured to be reversible individually. By applying a magnetic field, these character display boards are selectively reversed to display desired numbers, and a display board provided on the front panel and a segment hole that rotatably supports the character display board on the board surface are used. comprising support plates arranged in a Japanese character shape and provided on the back surface of the display board so as to be able to move toward and away from the display board; and support means for supporting the support plates so that they can move toward and away from the display board; A display device characterized in that the character display board supported by the supporting means so as to be in contact with the back surface of the display board comes into contact with the back surface of the display board and is prevented from being reversed.