JP2005104601A - Display device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device for an elevator preventing leakage of light between dots in LED dot matrix and suppressing no exchange work of an LED element. <P>SOLUTION: In the display device installed at an elevator landing, the dot matrix is constituted by a plurality of light emission diodes 10 mounted onto a circuit board and having the mutual space therebetween is partitioned by a partition plate. The display device for the elevator is provided with a press plate 24 provided at the back side of the circuit board and imparting action force for uniformly pressing the whole of the circuit board. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an elevator display device, and more particularly to a structure for preventing light leakage from a light emitting diode to the periphery in a dot matrix composed of light emitting diodes.

  The elevator is provided with a display device in the car and at the landing to display the floor position and traveling method to the user. As this display device, a device that emits light by a dot matrix using a light emitting diode (hereinafter simply referred to as LED) is widely used.

  FIG. 3 shows a cross-sectional structure of a display device installed at the elevator hall. This hall display device is composed of two parts, a guidance display part and a push button part.

  The guidance display unit performs floor display indicating the floor position of the car and direction display indicating the traveling direction of the elevator. And the guidance display part attaches the casing comprised by the back plate 3 and the surface board 4 to the outer surface 2 of the landing wall 1, and incorporates various display elements in this casing.

  That is, the light diffusion plate 5 is disposed at the center of the surface plate 4, and the position display substrate 6 is provided at a position corresponding to the light diffusion plate 5 inside the casing. A control board 7 is disposed below the position display board 6, and a push button board 8 is disposed below the position display board 6.

  The position display substrate 6 is fixed to the surface plate 4 via an LED partition plate 9, and light emitting diodes, that is, LEDs 10 are arranged in each region partitioned by the LED partition plate 9 in the position display substrate 6, A light guide space 11 is formed around the LED 10.

  The position display substrate 6 is fixed to the surface plate 4 together with the light diffusing plate 5 by a stud 12, and the substrates 6, 7 and 8 are connected to each other by a connector 13 and a cable 19. A control circuit 14 is provided on the control board 7, and a push button operation unit 15 and a switch 16 are provided on the push button board 8.

  Reference numeral 17 denotes a screw for fixing the front plate 4 to the back plate 3, and reference numeral 18 denotes a screw for fixing the back plate 3 to the wall. Reference numeral 21 denotes a power source and a communication line, which are wired through an external line connector 23 provided in the wiring duct 22.

  4 is an external view of the position display board 6 shown in FIG. 3 as viewed from the landing side. As shown in FIG. 4, an LED 10 is arranged in each section formed by the LED partition plate 9 to form a dot matrix.

  The position display substrate 6 used in the above-described display device is generally made of an epoxy resin containing glass fiber, is elastic, and easily warps due to a temperature rise or the like. This warpage may cause a gap 20 between the bottom of the LED 10 mounted on the position control board 6.

  Since the LED 10 is accommodated in the glass housing, the generated light is emitted to the surroundings. If there is a gap 20 between the position display substrate 6 and the bottom of the LED 10, light leaks from the gap 20 toward the other section.

  As a result, light is emitted beyond the boundary between dots of the dot matrix constituted by the LEDs 10, and the display contents become unclear because the dots cannot emit light independently of each other for display.

  Conventionally, as a countermeasure, the position display substrate 6 may be bonded and fixed to the LED partition plate 9 or caulked and fixed, whereby the position display substrate 6 can be brought into close contact with the LED partition plate 9.

  However, if fixed in this way, it cannot be separated after that, and the workability such as replacement of the LED chip is impaired. In the case of caulking and fixing, there are restrictions on pattern wiring and component mounting positions.

  The present invention has been made in consideration of the above-described points, and an object of the present invention is to provide an elevator display device that prevents light leakage between dots in an LED dot matrix and does not hinder the replacement operation of LED elements.

In order to achieve the above object, in the present invention,
In a display device installed on an elevator hall, a dot matrix is formed by a plurality of light emitting diodes mounted on a circuit board and separated from each other by a partition plate, and is provided behind the circuit board. A display device for an elevator, characterized in that it has a pressing plate that applies an acting force to uniformly press the whole;
Is to provide.

  In the present invention, as described above, the circuit board in the display device that forms the dot matrix by the LEDs attached to the circuit board is pressed evenly from the back by the pressing plate. It is possible to prevent the substrate from warping.

Example 1
FIG. 1 is a partial side sectional view showing a side sectional structure of an embodiment of the present invention. In FIG. 1, the same reference numerals as those in FIGS. 3 and 4 denote the same elements. The pressing plate 24 is an element newly added in the present invention. The pressing plate 24 is inserted between the position display board 6 and the back plate 3 of the casing to apply a pressing force to the position display board 6 from behind. Make it work. The pressing plate 24 is made of, for example, resin and has an appropriate rigidity.

  The pressing plate 24 applies an acting force from behind the circuit board 6 so as to press the partitioning plates 9 against the light diffusion plate 5 separately. As a result, the circuit board 6 is pressed against the bottom of each partition plate 9 by the pressing force applied from the pressing plate 24, and the circuit board 6 maintains a flat state, so that a gap is generated between the circuit board 6 and the partition plate 9. Absent.

  The pressing plate 24 is screwed to the surface plate 4 of the casing together with the circuit board 6. The pressing plate 24 comes into contact with the circuit board 6 by a projection provided at the position of the partition plate 9, while the pressing plate 24 comes into contact with the casing back plate 3 by three legs in the illustrated case. Yes. Accordingly, the pressing plate 24 is interposed between the casing back plate 3 and the circuit board 6 and presses the circuit board 6 from behind to keep the circuit board 6 flat.

  As a result, it is possible to prevent a gap from being generated between the bottom of the LED 10 and the surface of the circuit board 6 due to the warp of the circuit board 6.

Example 2
FIG. 2 is a partial sectional side view showing a second embodiment of the present invention. In this embodiment, the pressing plate 24 is not in contact with the back plate 3 of the casing, but is in contact with a receiving plate 25 fixed to the front plate 4 so as to float from the back plate 3.

  Since the receiving plate 25 has the role of the back plate 3 in the embodiment of FIG. 1, it is desirable to have high rigidity. And since the receiving plate 25 is fixed to the surface plate 4 by the receiving plate fixing | fixed part 26 comprised, for example with a sleeve and a volt | bolt, it is necessary to select the intensity | strength of the receiving plate solid part 26 suitably.

Explanatory drawing which shows the structure of one Example of this invention. Explanatory drawing which shows the other Example of this invention. Side sectional drawing which shows the structure of the display apparatus of the conventional elevator. Explanatory drawing which shows the external appearance of the display apparatus of the conventional elevator.

Explanation of symbols

1 landing wall 2 landing wall surface 3 casing back plate 4 casing surface plate,
5 Light diffusion plate 6 Circuit board 7 Position display board 8 Push button board,
9 LED separator 10 LED
11 Light guide space 12 Stud,
13 Connector 14 Control circuit 15 Pushbutton operation section 16 Switch 17, 18 Screw 19 Cable 20 Clearance 21 Power supply and communication line,
22 Wiring duct 23 External connector 24 Pressure plate 25 Receiving plate 26 Receiving plate fixing part

Claims (3)

In a display device that is mounted on a circuit board and that comprises a dot matrix by a plurality of light-emitting diodes that are separated from each other by a partition plate,
A display device for an elevator, comprising a pressing plate provided behind the circuit board and providing an acting force for pressing the entire circuit board evenly. The elevator display device according to claim 1,
The pressure plate is an elevator display device that is interposed between a housing of the display device and the circuit board. The elevator display device according to claim 1,
The display device for an elevator, wherein the pressing plate is interposed between a receiving plate provided in a housing of the display device and the circuit board.

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