JP2013034078A - Thin display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure that a lighting indication part is firmly fitted in place with an inexpensive structure and by simple means.SOLUTION: A lighting indication part 4 is provided on a front cabinet 2, made of synthetic resin, which has a liquid crystal module disposed therein. The lighting indication part 4 includes light-emitting diodes (LEDs) provided on a printed wiring board 6, and indication windows 7 are opened in the front cabinet 2 corresponding to the light-emitting diodes (LEDs). Lens bodies 8 integrally formed on a lens holder 9 made of transparent synthetic resin are interposed between the indication windows 7 and the light-emitting diodes (LEDs), and light shading plates 22 are integrally protruded adjacent to the indication windows 7 on the front cabinet 2. Guide holes 23 for the light shading plates 22 to be inserted therethrough are opened in the lens holder 9, with stands 24 integrally protruded on the lens holder 9. The guide holes 23 are engaged with the light shading plates 22, and the lens holder 9 is disposed on the front cabinet 2, while the printed wiring board 6 is placed on the stands 24 and fixed to the front cabinet 2 with a screw 30.

Description

The present invention is, for example, a thin display device such as a liquid crystal television, and in particular, the lighting display unit can be easily and reliably attached with an inexpensive structure.

Conventionally, as an example of a thin display device, there is one shown in FIGS. 6 to 9, which is a liquid crystal television, and a liquid crystal module (thin display portion) 1 is arranged in a synthetic resin front cabinet 2. The rear cabinet 3 made of synthetic resin is covered, a lighting display portion 4 is provided at one lower end of the front cabinet 2, and a switch portion 5 is provided at the lower center of the front cabinet 2.

As shown in FIGS. 7 to 9, the lighting display unit 4 includes a plurality of (three in this example, for power supply, DVD, and remote control) arranged on a rectangular printed circuit board 6 at a predetermined interval. There is a light-emitting diode LED, and the front cabinet 2 corresponding to each light-emitting diode LED
A plurality of display windows 7 are opened, and a plurality of columnar lens bodies 8 are interposed between the display windows 7 and the light emitting diodes LED.

As shown in FIGS. 7 to 9, each lens body 8 is integrally formed with a rectangular lens holder 9 made of a transparent synthetic resin, and a pair of positioning projections 11 are integrally projected on both ends of the rear surface of the lens holder 9. A positioning hole 12 is provided through the printed circuit board 6 corresponding to each positioning projection 11 and a plurality of ribs 13 for positioning the lens holder 8 and a plurality (for fixing the printed circuit board 6) are provided. In this example, three hooks 14 are integrally projected on the front cabinet 2, and a positioning recess 15 is formed on the outer periphery of the lens holder 9 corresponding to the rib 13.

The assembly procedure of the lighting display unit 4 will be described. As shown in FIG. 9, the positioning recess 15 of the lens holder 9 is fitted to the rib 13 in a state where the front cabinet 2 is placed on the work table. The lens body 8 is opposed to each display window 7 and the lens holder 9 is positioned on the front cabinet 2 in a predetermined manner. Subsequently, each positioning hole 12 of the printed wiring board 6 is fitted to each positioning projection 11, and the outer peripheral edge of the printed wiring board 6 is connected to each hook 14.
The printed wiring board 6 and the lens holder 9 are fixed to the front cabinet 2 by being engaged with each other.

As shown in FIG. 6, the switch unit 5 has a plurality (seven in this example) of tact switches 18 arranged on a rectangular plate-like printed wiring board 17 at a predetermined interval. Correspondingly, a plurality of push buttons 19 are arranged on the front cabinet 2 so as to be movable within a certain range.

The assembling procedure of the switch unit 5 is almost the same as that of the lighting display unit 4, and the printed wiring board 17 is positioned and fixed to the front cabinet 2 by a plurality of hooks (not shown) integrally provided on the front cabinet 2. doing.

In the above configuration, when a suitable push button 19 is pressed to operate the tact switch 18 or the remote control, for example, a predetermined light emitting diode LED corresponding to a power source, a DVD, a remote control, etc. is emitted, and the display window 7 is turned on. Done. In addition, there exists what was described in patent document 1 as a related technique.

JP 2007-58928 A

In the above conventional configuration, a plurality of hooks 14 are used to fix the printed wiring boards 6 and 17, and the plurality of hooks 14 have a special shape with a large head, so that the mold for molding the front cabinet 2 is used. The structure becomes complicated and the production costs are high.

Further, since the printed wiring boards 6 and 17 are only hooked and fixed to the plurality of hooks 14, for example, a tool or the like comes into contact with the printed wiring boards 6 and 17 after the assembling work.
May be displaced or the fixed state may be released, resulting in assembly failure.

Furthermore, when a suitable light emitting diode LED is caused to emit light and a lighting display is performed from the display window 7, light may leak to the adjacent display window 7 and it may be difficult to confirm the lighting display.

In addition, the lighting display unit 4 and the switch unit 5 are provided separately, which increases the number of parts and increases the production cost.

The present invention has been made in view of the above-described conventional drawbacks, and an object of the present invention is to provide a thin display device capable of easily and reliably mounting a lighting display unit with an inexpensive structure.

In order to achieve the above object, the invention described in claim 1 is characterized in that a lighting display unit is provided in a synthetic resin front cabinet provided with a thin display unit, and the lighting display unit has a light emitting diode provided on a printed wiring board. In a thin display device in which a display window is established in the front cabinet corresponding to the light emitting diode, and a lens body integrally formed with a lens holder made of a transparent synthetic resin is interposed between the display window and the light emitting diode. A light shielding plate is provided integrally with the front cabinet adjacent to the display window, a guide hole for inserting the light shielding plate is provided through the lens holder, and a stand is provided integrally with the lens holder. Place the lens holder in the front cabinet by fitting the guide hole of the lens holder to the light shielding plate, and place the printed circuit board on the stand Emitting diode is opposed to the display window via the lens body, it is characterized in that so as to fix the printed circuit board on the front cabinet by.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, the printed wiring board is fastened to the front cabinet with screws.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the printed wiring board is provided with a switch portion including a plurality of tact switches, and a plurality of tact switches are provided in the front cabinet corresponding to each tact switch. The push button is arranged to be movable within a certain range.

According to the first aspect of the present invention, the lens holder can be positioned and placed on the front cabinet in a predetermined manner using the light shielding plate as a guide by fitting the guide hole of the lens holder to the light shielding plate. Subsequently, by fixing the printed wiring board placed on the stand of the lens holder to the front cabinet, the light emitting diode provided on the printed wiring board is accurately opposed to the display window through the lens body. Can do.

In addition, since a printed wiring board is fixed in a way that does not protrude from the front cabinet as a conventional hook with a special shape, the structure of the mold for molding the front cabinet is simplified and the production cost is reduced. Is cheap.

In addition, since the printed wiring board is securely fixed to the front cabinet, even if a tool comes in contact with it, the position of the printed wiring board does not shift or the fixed state is not released, and the assembled state of the lighting display section Can be reliably maintained.

In addition, since the light emission of the light emitting diode is prevented from leaking to the side by the light shielding plate, only the display window facing the light emitting diode can be surely illuminated.

According to the second aspect of the present invention, the printed wiring board can be easily and securely fixed to the front cabinet with the screws.

According to the third aspect of the invention, since the printed wiring board of the lighting display unit and the switch unit is made common, the number of parts is smaller than in the prior art, and the manufacturing cost can be reduced.

The front view of the thin display apparatus which is one Embodiment of this invention, (b) is the same side view. It is a partially cutaway rear view of the principal part. It is a horizontal sectional view of the principal part. It is a longitudinal cross-sectional view of the principal part. It is a disassembled perspective view of the principal part. (A) is a front view which shows a prior art example, (b) is the side view. It is a longitudinal cross-sectional view of the principal part. It is a perspective view of the principal part. It is a disassembled perspective view of the principal part.

1 to 5 show a thin display device according to an embodiment of the present invention, which is a liquid crystal television set of a synthetic resin front cabinet 2 in which a liquid crystal module (thin display portion) 1 is arranged. The lighting display part 4 and the switch part 5 are integrally provided in the lower center. Components other than those described above are denoted by the same reference numerals as those shown in FIGS. 6 to 9 and description thereof is omitted.

The lighting display unit 4 includes a plurality of (three in this example, for power supply, DVD and remote control) light emitting diodes LED arranged on a rectangular printed wiring board 6 at a predetermined interval.
A plurality of display windows 7 are opened in the front cabinet 2 corresponding to the light emitting diodes LED, and a plurality of columnar lens bodies 8 are interposed between the display windows 7 and the light emitting diode LEDs, respectively. 8 is integrally formed with a rectangular lens holder 9 made of a transparent synthetic resin. Further, a remote control sensor 20 is disposed on the printed wiring board 6 adjacent to the light emitting diode LED, and a reception window 21 is opened in the front cabinet 2 and the lens holder 9 corresponding to the sensor-20.

As shown in FIGS. 2 to 5, a plurality of (three in this example) cross-sectional semicircular light shielding plates 22 adjacent to the display windows 7 are formed in the front cabinet 2 around the display windows 7. One-piece projecting,
A plurality of semicircular guide holes 23 through which the respective light shielding plates 22 are inserted penetrate the lens holder 9 with the lens body 8 as the center.

As shown in FIGS. 2 to 5, stands 24 are integrally projected at a plurality of locations of the lens holder 9, and the guide holes 23 are fitted to the respective light shielding plates 22 so that the lens holder 9 is placed on the front cabinet 2. When placed, each stand 24 is set to project outward by a slight distance t (for example, about 0.5 to 1 mm) from each light shielding plate 22 (see FIG. 3). When the printed wiring board 6 is placed on the printed wiring board 6, the light shielding plates 22 are formed so as not to hit the printed wiring board 6.

As shown in FIG. 5, lattice-like ridges 25 are integrally formed around each display window 7 and reception window 21 of the front cabinet 2, and the lens holder 9 is stably placed on the ridges 25. The A reinforcing frame 26 is integrally formed on the outer periphery of the lens holder 9.

As shown in FIGS. 1 and 5, the tact switches 18 forming the switch unit 5 are arranged on the printed wiring board 6 at a predetermined interval, and the push buttons 19 facing the tact switches 18 are placed within a certain range. An insertion hole 27 that is movably inserted is provided in the front cabinet 2, and a pair of bosses 28 are interposed between the lighting display unit 4 and the switch unit 5.
The screws 30 are screwed into the bosses 28 through the through holes 29 at both ends of the printed wiring board 6.

The assembly procedure will be described. As shown in FIG. 5, by fitting the guide holes 23 of the lens holder 9 to the light shielding plates 22 with the front cabinet 2 placed on the work table,
The lens holder 9 is positioned and placed on the front cabinet 2 using the light shielding plates 22 as guides, and the lens bodies 8 are opposed to the display windows 7. Subsequently, by placing the printed wiring board 6 on each stand 24, each light emitting diode LED is opposed to each lens body 8, and each tact switch 18 is opposed to each push button 19 inserted into each insertion hole 27. The screws 30 are screwed into the screw holes of the bosses 28 through the through holes 29 at both ends of the printed wiring board 6, so that the printed wiring board 6 and the lens holder 9 are fixed to the front cabinet 2.

In the above configuration, a predetermined light emitting diode LED corresponding to, for example, a power source, a DVD, a remote controller, or the like is obtained by operating the remote controller to receive a signal with the sensor-20 or operating the tact switch 18 by pressing an appropriate push button 19. Light is emitted and the display window 7 is turned on.

According to the above configuration, the lens holder 9 is positioned and placed on the front cabinet 2 in a predetermined manner by fitting each guide hole 23 of the lens holder 9 to each light shielding plate 22 with each light shielding plate 22 as a guide. Subsequently, the printed wiring board 6 placed on the stand 24 of the lens holder 9 is fastened to the front cabinet 2 with screws 30, so that the light emitting diodes LED provided on the printed wiring board 6 can be attached to the lens. It is possible to accurately face the display window 7 through the main body 8.

Further, in order to fix the printed wiring board 6, since a thing corresponding to a conventional specially shaped hook 14 (see FIG. 9) is not integrally projected on the front cabinet 2, a mold for molding the front cabinet 2 This simplifies the structure and reduces production costs.

Furthermore, since the printed wiring board 6 is securely fixed to the front cabinet 2 with the screws 30, even if a tool or the like comes into contact therewith, the position of the printed wiring board 6 is not shifted or the fixed state is not released. The assembly state of the lighting display unit 4 (and the switch unit 5) can be reliably maintained.

In addition, since the light emission of the light emitting diode LED is prevented from leaking to the side by the light shielding plate 22, only the display window 7 facing the light emitting diode LED can be surely illuminated, and the adjacent irrelevant as in the prior art. The problem that the display window 7 shines can be solved.

Furthermore, since the printed wiring board 6 of the lighting display unit 4 and the switch unit 5 is shared, the number of parts is smaller than in the conventional case, and the manufacturing cost can be reduced.

In the above embodiment, the case where three light emitting diodes LED are provided has been described as an example. However, the present invention is not limited to this, and the case where one, two, or four or more light emitting diodes LED are provided is also described. Applied.

Further, although the screw 30 is used as a means for fixing the printed wiring board 6 to the front cabinet 2, the present invention is not limited to this, and adhesive or welding with an adhesive may be employed instead of the screw 30. .

1 LCD module (thin display)
2 Front cabinet 4 Illumination display section 5 Switch section 6 Printed wiring board 7 Display window 8 Lens body 9 Lens holder 18 Tact switch 19 Push button 22 Light shielding plate 23 Guide hole 24 Stand 30 Screw

Claims (3)

A synthetic resin front cabinet with a thin display unit is provided with a lighting display unit, the lighting display unit has a light emitting diode provided on a printed wiring board, and a display window is established in the front cabinet corresponding to the light emitting diode In a thin display device in which a lens body formed integrally with a lens holder made of a transparent synthetic resin is interposed between a display window and a light emitting diode, a light shielding plate projects integrally with the front cabinet adjacent to the display window. A guide hole through which the light shielding plate is inserted is provided in the lens holder, and a stand is integrally projected from the lens holder, and the guide hole of the lens holder is fitted to the light shielding plate, and the lens holder Is placed in the front cabinet, and the printed wiring board is placed on the stand to display the light-emitting diode through the lens body. Is opposed to the window, a thin display device is characterized in that so as to fix the printed circuit board to the front cabinet. 2. The thin display device according to claim 1, wherein the printed wiring board is fixed to a front cabinet with screws. 2. The printed wiring board is provided with a switch portion including a plurality of tact switches, and a plurality of push buttons are arranged on the front cabinet so as to be movable within a predetermined range corresponding to each tact switch. Or a thin display device according to 2;

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