JP2008275824A - Thin display device and method for assembling body structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means for achieving an economical body structure provided with high rigidity and strength equivalent to that of a conventional aluminum die-cast member by replacing a main part of the body structure in a thin display device provided with a detachable stand from the conventional aluminum die-cast member to an inexpensive steel sheet member. <P>SOLUTION: The body structure is constituted of a left side reinforcing fitting 10, a right side reinforcing fitting 11, a relay fitting 12, and a fixing fitting 13 which are laid on the back of a backlight chassis 9 composing an optical system of a thin display device and composed of a steel sheet member, and relay fitting hook claws 10a, 11a formed on the left side reinforcing fitting 10 and the right side reinforcing fitting 11 are fitted with reinforcing fitting locking holes pierced in a tab 12a of the relay fitting 12. Further, stand fixing fitting locking claws formed in the vicinity of the lowermost ends of the left side reinforcing fitting 10 and the right side reinforcing fitting 11 are hooked to the end side of the stand fixing fitting 13. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a casing structure of a thin display device using a liquid crystal display panel, a PDP, or the like as a screen display element.

Recently, thin display devices using liquid crystal display panels or PDPs as screen display elements are light and thin, and can realize large display screens. Display devices are rapidly being replaced. The thin display device is not limited to desktop installation, floor-standing installation, and hanging installation from the ceiling, which are installation means of a cathode ray tube type display device, and is thin and lightweight despite an increase in the size of the display screen. Because of this feature, it also enables wall-mounted installation that can save installation space.

The liquid crystal display panel of a thin display device using a liquid crystal display panel as a screen display element has a liquid crystal material having a desired photoelectric conversion characteristic sealed in a minute gap in a surface where a plurality of glass plates face each other, and the minute gap is displayed. Since it is necessary to stably hold the entire screen at a few microns, it is impossible to apply a strong mechanical stress to the liquid crystal display panel from the outside. Therefore, in addition to the screen display quality by the liquid crystal display panel, in order to maintain high reliability, the casing of the thin display device is thin, but the strength of the casing inside the thin display device is robust, In addition, high rigidity is required.

As a conventional technical means for realizing light weight and sufficient strength and rigidity as a casing inside a thin display device, as seen in Patent Document 1, a large size is provided on the back side of the backlight chassis arranged on the back side of the liquid crystal display panel. A plurality of bridge-shaped reinforcing metal fittings made of aluminum die-cast were straddled in the vertical direction.
Japanese Patent Application No. 2005-352332

In order to realize light weight and sufficient strength and rigidity as a casing of a thin display device, the aluminum die-cast reinforcing metal fittings constituting the main part of the above-described conventional casing structure require a considerable thickness dimension, Cost push factors were large in terms of aluminum raw material costs, casting mold costs, tap processing after casting, and end finishing processing costs.

A plurality of reinforcements formed by sheet metal processing of a steel plate member, which is straddled in the vertical direction of the back surface of the backlight chassis constituting the optical system of the thin display device, with the housing structure inside the thin display device having a detachable stand. A bracket, a stand fixing bracket with which the upper portion of the stand column fits, a reinforcing bracket and a relay bracket that relays the stand fixing bracket.

  A relay fitting latching claw is formed on the reinforcement fitting with which the relay fitting is engaged, and a reinforcement fitting locking hole is formed in a tab folded perpendicularly to the back surface of the relay fitting, so that the relay fitting of the reinforcement fitting is formed. The locking claw is fitted and locked in the reinforcing metal locking hole of the relay metal.

A stand fixing bracket locking claw is formed in the vicinity of the lower end of the reinforcing bracket and the reinforcing bracket with which the stand fixing bracket is engaged, and the stand fixing bracket locking claw is hooked on the end side of the stand fixing bracket.

A method for assembling a housing structure inside a thin display device having a detachable stand, wherein a plurality of reinforcing brackets straddling the back of a backlight chassis constituting the optical system and a stand fixing in which an upper portion of a stand column is fitted And a relay bracket for relaying the reinforcing bracket and the stand fixing bracket. After fixing the relay bracket and the approximate stand fixing bracket to the backlight chassis, The reinforcing bracket is fixed to the backlight chassis by fitting and hooking on an approximate stand fixing bracket.

According to the present invention, the backlight constituting the optical system of the thin display device without using a die-cast reinforcing metal fitting made of an expensive aluminum member as a housing structure inside the thin display device having a detachable stand. A plurality of reinforcing brackets straddling the back of the chassis, a stand fixing bracket that fits the upper part of the stand column, and a relay bracket that relays the reinforcing bracket and the stand fixing bracket are formed by sheet metal processing of a steel plate member. Thus, it is possible to more economically realize a housing structure inside a thin display device having high rigidity equivalent to that of a reinforcing metal fitting by die-casting of an aluminum member according to the prior art.

A relay fitting latching claw is formed on the reinforcement fitting with which the relay fitting is engaged, and a reinforcement fitting locking hole is formed in a tab folded perpendicularly to the back surface of the relay fitting, so that the relay fitting of the reinforcement fitting is formed. By engaging and locking the locking claws with the reinforcing metal locking holes of the relay metal fittings, it is possible to reduce the number of screwing points while ensuring the assembly strength.

Assembling by forming a stand fixing bracket locking claw in the vicinity of the lower end of the reinforcing bracket with which the stand fixing bracket engages, and hanging the stand fixing bracket locking claw on the end side of the stand fixing bracket It is possible to reduce the number of screwing points while ensuring the strength.

A signal fixed to the back surface of the backlight chassis by fitting and hooking the relay metal fitting and the general stand fixing metal fitting with the retaining claws of the reinforcing metal fitting, and then fixing the reinforcing metal fitting to the backlight chassis. It becomes possible to easily repair the processing circuit board, the power supply board, the inverter board, and the like.

Hereinafter, a case where an embodiment of the present invention is applied to a liquid crystal television will be described with reference to the drawings. FIG. 1 is a front view of a liquid crystal television. In FIG. 1, 1 is a front cabinet, 2 is a liquid crystal display panel for image display, 3 is a stand when the liquid crystal television is used as a desktop type, and 4 is for engaging the stand 3 and the liquid crystal television body. It is a stand column.

Next, an outline of the configuration of the optical system unit inside the liquid crystal television will be described based on the exploded perspective view of FIG. On the back side of the LCD panel 2, advanced light control technologies such as light reflection, polarization, refraction, and light diffusion are used to improve image quality such as high brightness and uniform screen brightness. An optical sheet set 6 composed of a plurality of film-like optical sheets having means such as forming a large number of microlens arrays on the surface and a light diffusion plate 5 are disposed. Further, behind the light diffusing plate 5, a backlight unit 7 for irradiating light to the optical sheet set 6 and the back surface of the liquid crystal display panel 2 is disposed. The backlight unit 7 is disposed in the backlight chassis 9. A number of arc tubes 8 are arranged and configured.

FIG. 3 (a) is a rear perspective view showing the internal housing structure after the rear cabinet is removed from the liquid crystal television according to the embodiment of the present invention, and FIG. 3 (b) is a stand 3 as shown by broken line arrows in the figure. It is a back perspective view which shows the state which extracted the stand support | pillar 4 from the stand fixing bracket 13 of this liquid crystal television main body lower part.

The backlight chassis 9 shown in FIG. 3A is the largest single structure composed of a highly rigid metal member among many structures constituting the thin display device. However, in order to maximize the features of a thin display device that is thin and lightweight, the backlight chassis 9 is formed in a thin shape and the stand column 4 integrated with the stand 3 is locked. Although a large mechanical stress is applied to the locking portion at the center of the lower side of the backlight chassis 9, according to the present invention, an expensive aluminum die cast member is not used for the housing structure including the locking portion. It is possible to provide sufficient strength by the steel plate member processed by sheet metal.

In the present invention, as shown in the rear perspective view inside the liquid crystal television showing the embodiment of FIG. 3A, the housing structure inside the thin display device having the detachable stand 3 constitutes the optical system of the thin display device. The left reinforcing bracket 10 and the right reinforcing bracket 11 formed by a steel plate member straddling the back surface of the backlight chassis 9, the stand fixing bracket 13 into which the upper portion of the stand column 4 is fitted, the left reinforcing bracket 10 and The right reinforcing bracket 11 and the relay bracket 12 that relays the stand fixing bracket 13 are used. A signal processing circuit board having a shield case 9a, a power supply board 9b, an inverter board 9c, and the like are fixed to the backlight chassis 9 with screws or the like, and the left reinforcing metal fitting 10 and the right reinforcing metal fitting 11 are connected to the shield case 9a. Or it is straddled across the backlight chassis 9 as a structure that passes over the power supply board 9b.

FIG. 4 is a longitudinal sectional view cut along a cutting line indicated by a chain line AA in FIG. 3A, and the above-mentioned right-side reinforcing metal fitting 11, relay metal fitting 12, and stand constituting a part of the casing structure. The assembly structure of the fixing bracket 13 and the stand column 4 is shown.

As shown in FIG. 3A, among many structures constituting the thin display device, the left and right sides of the upper and lower sides of the backlight chassis 9 which is the largest single structure composed of a highly rigid metal member. A first backlight chassis mounting bracket 14 is locked in the vicinity of both ends, and the first backlight chassis mounting bracket 14 is screwed to the front cabinet 1. Further, a second backlight chassis mounting bracket 15 is locked at the center of the upper side of the backlight chassis 9, and the second backlight chassis mounting bracket 15 is screwed to the front cabinet 1. Are locked together with the front cabinet 1 via the first backlight chassis mounting bracket 14 and the second backlight chassis mounting bracket 15.

However, the front cabinet 1 is formed by molding a thermoplastic resin member, and it is necessary to avoid occurrence of appearance problems such as sink marks generated during molding. In order to maximize the “thinness” that is the feature of the apparatus, the front cabinet 1 is designed with considerations in terms of design so as to realize a thin shape as a whole. Furthermore, since the backlight chassis 9 and the bag made of a highly rigid metal member are also thin like the front cabinet 1, a glass thin plate member is used between the front cabinet 1 and the backlight chassis 9. The rigidity of the backlight chassis 9 and the front cabinet 1 is not sufficient to hold the liquid crystal display panel (not shown).

In order to prevent bending deformation of the front cabinet 1, the liquid crystal display panel, and the backlight chassis 9 constituting the main part of the liquid crystal television and to improve the rigidity, the left side of the cutting line AA indicated by a chain line in FIG. The left reinforcing metal fitting 10 is arranged on the right side of the cutting line AA, and the right reinforcing metal fitting 11 is arranged on the right side of the cutting line AA at a line symmetric position with the cutting line AA being the axis of symmetry. Further, the upper ends of the left reinforcing metal fitting 10 and the right reinforcing metal fitting 11 are screwed to the second backlight mounting bracket 15, and the lower portions of the left reinforcing metal fitting 10 and the right reinforcing metal fitting 11 are connected to the relay metal fitting 12 by screws 16. By screwing, the left reinforcing metal fitting 10 and the right reinforcing metal fitting 11 are locked to the lower back of the backlight chassis 9 through the relay metal fitting 12.

The lower part of the left side reinforcing bracket 10 and the right side reinforcing bracket 11 is not screwed directly to the back surface of the backlight chassis 9, but is engaged with the lower portion of the back surface of the backlight chassis 9 via the relay bracket 12. It is possible to disperse the concentrated stress on the locking point of the backlight chassis 9 constituted by the members, and it is possible to avoid the partial deformation of the backlight chassis 9 constituted by the steel plate members.

FIG. 5 shows an embodiment of the left reinforcing metal fitting 10 among the left reinforcing metal fitting 10 and the right reinforcing metal fitting 11 arranged symmetrically with the cutting line AA indicated by the chain line in FIG. As described above, a relay fitting locking claw 10a is formed at the lower part of the end side of the left reinforcing fitting 10 facing the cutting line AA. Here, in FIG. 5, 10c is a screw fastening hole, 10d is a caulking boss for mounting a wall hanging bracket, and 10e is a caulking boss for fixing a screw to the rear cabinet. On the other hand, as shown in the perspective view of FIG. 6 which is an embodiment of the relay fitting 12, the relay fitting 12 to which the lower portion of the left side reinforcing fitting 10 is locked has a tab 12 a folded up from the relay fitting 12. In addition, a reinforcing bracket locking hole 12b is formed in a substantially central portion of the tab 12a. Here, in FIG. 6, 12b is a reinforcement fitting locking hole, and 12c-12g is a screw fastening hole.

As described above, the lower part of the left reinforcing metal fitting 10 is screwed to the relay metal fitting 12 by the screw 16 shown in FIG. 3, and the relay metal engaging claw 10a formed on the left reinforcing metal fitting 10 shown in FIG. By fitting into a reinforcing metal fitting locking hole 12b drilled in a substantially central portion of the relay metal fitting 12 shown in FIG. 6, the relay metal fitting 12 is firmly locked.

Further, as shown in FIG. 5, a stand fixing bracket locking claw 10 b is formed at the lowermost portion of the left reinforcing bracket 10 so as to protrude in the direction of the cutting line AA indicated by a chain line in FIG. The stand fixing bracket locking claw 10b is hooked on the reinforcing bracket engaging portion 13a of the stand fixing bracket 13 shown in FIG. 7, and the lowermost portion of the left reinforcing bracket 10 and the stand fixing bracket 13 are firmly locked. . In FIG. 7, 13b is a stand column fixing hole, 13c is a driver passage hole, 13d and 13f are screw fastening holes, and 13e is a caulking boss for fixing the stand column.

The locking means for the left reinforcing metal fitting 10, the relay metal fitting 12, and the stand fixing metal fitting 13 have been described in detail above. The cutting line indicated by the chain line AA in FIG. The right-side reinforcing metal fitting 11 disposed in the frame is also locked to the relay metal fitting 12 and the stand fixing metal fitting 13 by the same means as the left-side reinforcing metal fitting 10.

Next, the assembly procedure of the liquid crystal television will be described with reference to FIGS. After aligning the backlight chassis 9 on which the shield case 9a, the power supply board 9b, the inverter board 9c and the like are fixed with screws on the front cabinet 1 at predetermined positions, the vicinity of the left and right ends of the upper and lower sides of the backlight chassis 9 The first backlight chassis mounting bracket 14 is screwed to the front cabinet 1. Further, the central portion of the upper side of the backlight chassis 9 is screwed to the front cabinet 1 by the second backlight chassis mounting bracket 15, and the backlight chassis 9 includes the first backlight chassis mounting bracket 14 and the second backlight chassis mounting bracket 14. And the front cabinet 1 through the backlight chassis mounting bracket 15.

Next, one end of the relay fitting 12 is fixed to the backlight chassis 9 by the screw fastening holes 12c and 12d of the relay fitting 12, and the other end of the relay fitting 12 is fixed to the boss provided in the front cabinet 1 by the screw fastening hole 12e. Next, after aligning the screw fastening hole 13d of the stand fixing bracket 13 with the screw fastening hole 12f of the relay fitting 12, the relay fitting 12 and the stand fixing bracket 13 are fastened together with the boss provided in the front cabinet 1 with screws. To do. The screw fastening hole 13f is a place where the stand fixing bracket 13 is fixed to a boss provided in the front cabinet 1 alone.

Next, after inserting the relay fitting locking claw 10a of the left reinforcing fitting 10 into the reinforcing fitting locking hole 12b from an oblique direction, the reinforcement fitting engaging portion 13a is hooked inside the stand fixing fitting locking claw 10b. While returning the insertion angle of the left reinforcing metal fitting 10, one is placed on the second backlight chassis mounting bracket 15 and the other is placed on a predetermined position on the relay metal fitting 12. Next, one of the left reinforcing metal fittings 10 is screwed and fixed to the second backlight chassis mounting bracket 15 with a screw fastening hole (not shown) of the left reinforcing metal fitting 10, and the other is a screw fastening hole 10 c and a screw fastening hole of the relay metal fitting 12. Screw fixed with 12g. The right reinforcing metal fitting 11 is also fixed in the same procedure as the order of attaching the left reinforcing metal fitting 10.

After assembling the above-described housing structure, the rear cabinet (not shown) is covered from the back of the housing structure, and the rear cabinet and the front cabinet 1 are fixed with screws to assemble the liquid crystal television. A screw tightening hole is provided at a position facing the stand column fixing hole 13b of the stand fixing bracket 13 of the rear cabinet. After the stand column 4 is inserted into the stand fixing bracket 13, the screw tightening hole of the rear cabinet is provided. Then, the fixing screws are inserted, and the stand fixing bracket 13, the stand column 4 and the rear cabinet are fixed together.

When the signal processing circuit board having the shield case 9a fixed to the backlight chassis 9, the power supply board 9b, the inverter board 9c, etc. is repaired by the housing structure and the assembling method as described above, the rear cabinet By removing the left reinforcing bracket 10 and the right reinforcing bracket 11 in a state where the liquid crystal television main body is temporarily supported by the stand column 4 and the stand support column 4 is removed, substrate repair or substrate replacement can be easily performed.

It is a front view of the liquid crystal television concerning embodiment of this invention. It is a disassembled perspective view which shows the structure outline | summary of the optical system unit inside the liquid crystal television concerning embodiment of this invention. FIG. 3A is a rear perspective view showing a housing structure inside the liquid crystal television according to the embodiment of the present invention, and FIG. 3B is a rear perspective view showing a state in which the stand is removed from the liquid crystal television main body. . It is the longitudinal cross-sectional view cut | disconnected along cutting line AA shown in Fig.3 (a). It is a perspective view of the left side reinforcement metal fitting which shows the embodiment of the present invention. It is an expansion perspective view of the relay metal fitting which shows embodiment of this invention. It is an expansion perspective view of the stand fixture which shows the embodiment of the present invention.

Explanation of symbols

1: Front cabinet 2: Liquid crystal display panel 3: Stand 4: Stand column 5: Light diffusion plate 6: Optical sheet set 7: Backlight unit 8: Luminescent tube 9: Backlight chassis 10: Left side reinforcing bracket 10a: Relay bracket Claw 10b: Stand fixing bracket locking claw 11: Right side reinforcing bracket 11a: Relay bracket locking claw 12: Relay bracket 12a: Tab 12b: Reinforcing bracket locking hole 13: Stand fixing bracket 13a: Reinforcing bracket engaging portion 14: First backlight chassis mounting bracket 15: Second backlight chassis mounting bracket 16: Screw

Claims (4)

A housing structure inside a thin display device having a detachable stand, a plurality of reinforcing brackets straddling the back surface of the backlight chassis constituting the optical system, and a stand fixing bracket with which the upper portion of the stand column is fitted A thin display device comprising a relay metal fitting for relaying the reinforcing metal fitting and the stand fixing metal fitting. The engagement between the reinforcing metal fitting and the relay metal fitting according to claim 1, wherein the reinforcing metal fitting is formed with a relay metal fitting pawl, and the relay metal fitting pawl of the reinforcing metal fitting is formed in the relay metal fitting. A thin display device characterized by being fitted and locked in a metal locking hole. A stand fixing bracket locking claw is formed in the vicinity of the lower end of the reinforcing bracket with which the stand fixing bracket according to claim 1 is engaged, and the stand fixing bracket locking claw is hung on an end of the stand fixing bracket. A thin display device characterized by being worn. A method for assembling a housing structure inside a thin display device having a detachable stand, wherein a plurality of reinforcing brackets straddling the back of a backlight chassis constituting the optical system and a stand fixing in which an upper portion of a stand column is fitted And a relay bracket for relaying the reinforcing bracket and the stand fixing bracket. After fixing the relay bracket and the approximate stand fixing bracket to the backlight chassis, A method for assembling a casing structure of a thin display device, wherein the reinforcing bracket is fixed to the backlight chassis by being fitted and hooked to an approximate stand fixing bracket.

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