JP2012220688A - Thin display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To respond to a demand for reduction in thickness of a cabinet with an inexpensive structure.SOLUTION: A thin display device includes a synthetic resin cabinet 1 in which a wall-mounted metal fitting 6 is fixed on a surface of a rear cabinet 1B by a plurality of connection members 5. The connection member 5 includes a cylindrical nut 21 having a male screw portion 21a on its outer peripheral surface and a connecting screw 15 screwed into the cylindrical nut 21. A bottomed cylindrical pocket 22 is integrally formed at a proper position on a surface of the rear cabinet 1B. The pocket 22 is divided into a back end side small-diameter portion 22a where an inner diameter d1 is smaller than an outer diameter D of the male screw portion 21a, and an opening end side large diameter portion 22b where an inner diameter d2 is equal to or slightly larger than the outer diameter D of the male screw portion 21a. The cylindrical nut 21 is screwed into the back end side small-diameter portion 22a through the opening end side large diameter portion 22b. The connecting screw 15 is screwed into the cylindrical nut 21 through a screw insertion hole 11 in the wall-mounted metal fitting 6.

Description

The present invention relates to a thin display device such as a liquid crystal television or a liquid crystal monitor, and in particular, can meet the demand for a thinner cabinet with an inexpensive structure.

6 to 9 are examples of conventional thin display devices, which are wall-mounted liquid crystal televisions. FIG. 6 is a horizontal sectional view, FIG. 7 is an exploded perspective view, and FIG. An enlarged cross-sectional view of
FIG. 9 is an exploded perspective view of the main part.

6 to 9, the wall-mounted liquid crystal television has a synthetic resin cabinet 1 made up of a front cabinet 1A and a rear cabinet 1B, and a liquid crystal module (display device) is mounted on the front cabinet 1A in the cabinet 1. A main body 2 is arranged, and a control board 3 made of a printed wiring board attached to the liquid crystal module 2 is provided with various electric parts 4 such as capacitors and resistors. In this case, the wall hanging bracket 6 is fixed by four connecting members 5, and the wall hanging bracket 6 is engaged with the hook fitting 8 of the wall surface 7.

As shown in FIG. 7, the wall-hanging metal fitting 6 has a U-shaped metal fitting main body 6a and a pair of side plates 6b that are bent from both ends of the metal fitting main body 6a and extend laterally, and is hooked to the metal fitting main body 6a. A hook hole 10 for hooking the metal fitting 8 is penetrated, and the screw insertion hole 1 is formed in each side plate 6b.
1 is penetrated.

As shown in FIGS. 8 and 9, the connecting member 5 includes a connecting metal 13 made of sheet metal, a fastening screw 14 for fixing the connecting metal 13 to the rear cabinet 1B, and the connecting metal 13.
And a connecting screw 15 for connecting the base metal plate 13 to the wall-mounting metal fitting 6. The connecting metal fitting 13 has a base end plate 13a abutting against the rear surface of the rear cabinet 1B and a right angle from the end edge of the base end plate 13a. An intermediate plate 13b that bends to the base plate 13b, and a distal end plate 13c that is bent from the end edge of the intermediate plate 13b and is parallel to the base end plate 13a. A bottomed cylindrical nut 16 is integrally formed at the center of the base end plate 13a. In addition to projecting, a communication hole 17 is formed through the rear cabinet 1B so as to face the nut 16, a screw insertion hole 18 is formed through the center of the tip plate 13c, and is opposed to the screw insertion hole 18. A boss 19 is integrally provided on the rear surface of the rear cabinet 1B.

The mounting procedure of the wall-mounted liquid crystal television will be described. As shown in FIG. 8, the fixing screw 14 is screwed into the center hole 19a of the boss 19 through the screw insertion hole 18 of the connecting metal 13, and the connecting metal 13
Is fixed to the rear surface of the rear cabinet 1B. Subsequently, the connecting screw 15 is screwed into the nut 16 through the screw insertion hole 11 of the wall hanging bracket 6 and the communication hole 17 of the rear cabinet 1B. The wall hanging bracket 6 is fixed to the center of the surface of the rear cabinet 1B. Then, as shown in FIG.
The hook hole 10 of the wall hanging bracket 6 is hooked on the hook fitting 8 of the wall surface 7. In addition, there exists what was described in patent document 1 as a related technique.

JP 2007-233301 A

In the above conventional configuration, in order to fix the wall-hanging bracket 6 to the rear cabinet 1B, a complicated-shaped coupling bracket 13, a fastening screw 14 and a coupling screw 15 are required, and the number of parts is large, so the cost is increased. become.

As shown in FIG. 6, since the connecting metal 13 and the fastening screw 14 are exposed in the cabinet 1, the safety distance α between the connecting metal 13 and the fastening screw 14 and the electrical component 4 is used as a safety standard. It is necessary to take enough based on this, and cannot respond to the request of the cabinet 1 to be thin.

As shown in FIG. 8, since the rear cabinet 1B is interposed between the wall hanging bracket 6 and the nut 16, and the distance M between the two is large, the fixing force of the wall hanging bracket 6 to the rear cabinet 1B is weak.

Therefore, as described in Patent Document 1, the insert nut is attached to the rear cabinet 1B.
It is conceivable that the wall-hanging bracket 6 is fixed to the center of the surface of the rear cabinet 1B by screwing the connecting screw 15 into the insertion nut, but this reduces the number of parts. Since the inside of the cabinet 1 and the outside air communicate with each other through the screw holes, foreign matter such as dust may enter the cabinet 1 through the screw holes of the insert nuts. Therefore, it is necessary to secure a sufficient safety distance α between the insert nut and the electrical component 4 on the basis of safety standards, and the demand for thinning the cabinet 1 cannot be met.

In addition, there is a possibility that the insert nut may be obliquely screwed into the communication hole of the rear cabinet 1B. To prevent this, it is conceivable to guide the insert nut and screw the insert nut straight. The cost increases by using.

An object of the present invention is to provide a thin display device which is inexpensive and has excellent confidentiality and can meet the demand for thin cabinets in view of the above-described conventional drawbacks.

In order to achieve the above object, the invention according to claim 1 is a surface of the rear cabinet of a synthetic resin cabinet comprising a front cabinet and a rear cabinet in which a display device body to which a control board with electric parts is attached is arranged. In the thin display device in which the wall mounting bracket is fixed by a plurality of connecting members, the connecting member has a cylindrical nut having an external thread formed on the outer peripheral surface, and a connecting screw screwed into the cylindrical nut, A bottomed cylindrical pocket is integrally formed at a suitable position on the surface of the rear cabinet, and the pocket has a small inner diameter on the back end with an inner diameter smaller than the outer diameter of the male thread, and the inner diameter is the same as or slightly smaller than the outer diameter of the male thread. It is divided into a large opening end side large diameter portion, and a cylindrical nut is screwed into the back end side small diameter portion through the opening end side large diameter portion. Is characterized in that only the to screw the connecting screw through the screw insertion hole of the bracket.

The invention described in claim 2 is characterized in that, in the invention described in claim 1, the outer peripheral surface of the tip end portion of the cylindrical nut is tapered and tapered.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a bottom wall portion for closing a back end of a screw hole of the cylindrical nut is integrally formed with the cylindrical nut. It is said.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a recess having an inner diameter larger than the inner diameter of the pocket is formed on the periphery of the opening end of the pocket on the surface of the rear cabinet, A flange facing the bottom surface of the recess is formed integrally with the outer peripheral surface of the base end of the cylindrical nut, and the flange is pressed against the bottom surface of the recess by screwing the cylindrical nut into the pocket.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, a non-slip groove is formed on the concave-facing surface of the flange.

The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein a polygonal head is integrally formed at the base end of the cylindrical nut, and penetrates through the center of the head. The hole is larger in diameter than the screw hole of the cylindrical nut and is formed concentrically with the screw hole.

The invention described in claim 7 is characterized in that, in the invention described in claim 6, a plus or minus operation groove is formed on the end face of the head.

According to the first aspect of the present invention, the connecting member has a cylindrical nut having an external thread portion formed on the outer peripheral surface and a connecting screw, and the number of parts is small, so that the cost can be reduced.

Further, by inserting the cylindrical nut into the bottomed cylindrical pocket, the cylindrical nut is positioned concentrically with respect to the small diameter portion on the back end side of the pocket using the large diameter portion on the opening end side of the pocket as a guide. From the above, the cylindrical nut can be screwed straight into the back end side small-diameter portion of the pocket in a predetermined straight line, whereby the screw for connecting to the cylindrical nut is also screwed in as predetermined, so that the wall-hanging bracket is attached to the rear cabinet. Can be fixed properly.

Furthermore, since the bottom of the cylindrical pocket shields the cylindrical nut and the electrical parts of the display device main body, the safety distance between the cylindrical nut and the electrical parts is sufficiently small based on safety standards. Thus, it is possible to meet the demand for thinner cabinets.

According to the second aspect of the present invention, when the tapered tapered tip of the cylindrical nut is inserted into the back end side small diameter portion of the pocket, the cylindrical nut is attached to the back end side small diameter portion. It can be positioned more concentrically.

According to invention of Claim 3, even if the back end of the screw hole of a cylindrical nut is closed by the bottom wall part and a long connecting screw is screwed in by mistake in the screw hole, this connection Since the tip of the machine screw hits the bottom wall and is not screwed in any further, the bottomed cylindrical pocket is not damaged by the wrong long connecting screw, and the shielding property by the bottomed cylindrical pocket Can be reliably maintained.

According to the fourth aspect of the present invention, the flange formed integrally with the outer peripheral surface of the base end of the cylindrical nut is brought into pressure contact with the bottom surface of the recess, so that the screwing of the cylindrical nut into the pocket can be prevented from loosening.

According to the fifth aspect of the present invention, the screwing of the cylindrical nut can be further prevented from being loosened by the anti-slip groove formed on the concave facing surface of the flange.

According to the invention described in claim 6, a tool such as a spanner is engaged with a polygonal head integrally formed concentrically with the base end of the cylindrical nut, and the screwing operation of the cylindrical nut is easily performed. be able to.

Since the wall hanging bracket is press-contacted to the head of the cylindrical nut, the wall hanging bracket can be firmly fixed to the rear cabinet by reducing the distance between the wall hanging bracket and the screw hole of the cylindrical nut. it can.

According to the invention described in claim 7, the screwdriver of the cylindrical nut can be easily screwed by engaging the screwdriver or the screwdriver with the plus or minus operation groove formed on the end face of the head. Can do.

It is a horizontal sectional view showing a thin display device which is one embodiment of the present invention. It is the same exploded perspective view. It is an expanded horizontal sectional view of the principal part. It is a disassembled perspective view of the principal part. (A)-(c) is explanatory drawing which shows the attachment procedure of a cylindrical nut, d)-(f) is explanatory drawing which shows the attachment procedure of a reference example. It is a horizontal sectional view showing a conventional example. It is the same exploded perspective view. It is an expanded horizontal sectional view of the principal part. It is a disassembled perspective view of the principal part.

1 to 5 show a thin display device which is an example of an embodiment of the present invention, which is a wall-mounted liquid crystal television, and a plurality (four in this embodiment) of connecting members 5 are provided as cylinders. Nut 2
1 and a connecting screw 15 that is screwed into the cylindrical nut 21 through the screw insertion hole 11 of the wall-hanging metal fitting 6, and a plurality of bottomed cylindrical pockets 22 are spaced at predetermined intervals on the surface of the rear cabinet 1B. In addition, a recess 23 having an inner diameter larger than the inner diameter of the pocket 22 is formed on the periphery of the opening end of the pocket 22. Since the configuration other than the above is substantially the same as the configuration shown in FIGS. 6 to 9, the same reference numerals are given to the same portions and the description thereof is omitted.

As shown in FIGS. 3 and 4, the recess 23 is surrounded by a peripheral wall portion 1a formed integrally with the rear cabinet 1B and a bottom wall portion 1b formed integrally with the peripheral wall portion 1a, and the pocket 2
2 is surrounded by a cylindrical wall portion 1c protruding integrally into the center of the bottom wall portion 1b of the recess 23 and projecting into the cabinet 1, and a bottom wall portion 1d integrally formed with the cylindrical wall portion 1c. The recess 23 and the pocket 22 are isolated from the cabinet 1.

As shown in FIG. 3 and FIG. 4, the pocket 22 has a rear end side small diameter portion 22a whose inner diameter d1 is smaller than the outer diameter D of the male screw portion 21a, and an inner diameter d2 that is the same or slightly smaller than the outer diameter D of the male screw portion 21a. It is divided into a large opening end side large diameter portion 22b (d1 <D ≦ d2).

As shown in FIG. 3 and FIG. 4, a male screw portion 21 a is formed on the outer peripheral surface of the cylindrical nut 21, and an outer peripheral surface 21 b of the tip end portion is formed in a tapered shape.
A bottom wall portion 21 c that closes the back end of the screw hole 24 is integrally formed with the cylindrical nut 21, and a flange 21 d that faces the bottom surface 23 a of the concave portion 23 is formed integrally with the outer peripheral surface of the proximal end of the cylindrical nut 21. A non-slip groove 25 is formed on the concave-facing surface of the flange 21d, and a polygonal (hexagonal in this embodiment) head portion 21e is integrally formed at the proximal end of the cylindrical nut 21, and the head portion 21e.
A through hole 26 penetrating in the center of the head has a diameter larger than that of the screw hole 24 and is formed concentrically with the screw hole 24, and a plus (or minus) operation groove 27 is formed on the end face of the head 21e. When the cylindrical nut 21 is screwed into the pocket 22, the head 21e is slightly spaced from the recess 23 by t.
It is set so as to protrude outward only (see FIG. 3).

5 (d) to 5 (f) are reference examples, and are formed to be flush with the inner circumferential surface of the pocket 22 from the back end to the opening end, and the inner diameter d 1 of the pocket 22 is set to the male thread portion of the cylindrical nut 21. It is set smaller than the outer diameter D of 21a (d1 <D), and as shown in FIGS. 5D and 5E, the tip of the cylindrical nut 21 is brought into contact with the pocket 22 from above, and FIG. As shown in (f), when the cylindrical nut 21 is screwed into the pocket 22, the cylindrical nut 21 is in a state where the axial center O of the cylindrical nut 21 is displaced from the axial center Oa of the pocket 22. May be screwed into the pocket 22 at an angle.

In the above reference example, it is difficult to smoothly screw the connecting screw 15 into the cylindrical nut 21 that is screwed obliquely, and the fixing force of the wall-hanging metal fitting 6 may be weakened. It is conceivable that the cylindrical nut 21 is screwed straight by being guided by a jig, but this increases the cost by using the jig.

On the other hand, the procedure for attaching the cylindrical nut 21 according to the present invention will be described. As shown in FIG. 5A, when the distal end portion of the cylindrical nut 21 is inserted into the pocket 22 from above, FIG.
), The cylindrical nut 21 is guided by the open end side large diameter portion 22b of the pocket 22, and the tip end portion of the cylindrical nut 21 is inserted into the back end side small diameter portion 22a of the pocket 22, and the pocket The axial center O of the cylindrical nut 21 is concentric with the 22 axial center Oa. After that, as shown in FIG. 5C, a tool such as a spanner is engaged with the head 21 e or a plus driver (or minus driver) is engaged with the operation groove 27 to bring the cylindrical nut 21 into the pocket 22. Screw in. As a result, a thread groove is forcibly formed on the inner peripheral surface of the rear end side small diameter portion 22a by the male screw portion 21a, and the flange 21d is pressed against the bottom surface 23a of the recess 23. Next, FIG.
As shown in FIG. 3, the connecting screw 15 is screwed into the screw hole 24 of the cylindrical nut 21 through the screw insertion hole 11 of the wall hanging bracket 6 and the through hole 26 of the head 21e. The wall-hanging metal fitting 6 is brought into pressure contact with the head 21e and fixed to the center of the surface of the rear cabinet 1B. Thereafter, as shown in FIG. 1, the hook hole 10 of the wall hanging bracket 6 is hooked on the hook fitting 8 of the wall surface 7.

According to the said structure, the connection member 5 has the cylindrical nut 21 which formed the external thread part 21a in the outer peripheral surface.
In addition, since the number of parts is small, the cost can be reduced.

Further, by inserting the cylindrical nut 21 into the bottomed cylindrical pocket 22, the pocket 22
Since the cylindrical nut 21 is positioned concentrically with respect to the back end side small diameter portion 22a of the pocket 22 using the open end side large diameter portion 22b as a guide, the cylindrical nut 21 is positioned on the back end side of the pocket 22 It can be screwed straight into the small-diameter portion 22a as predetermined, whereby the connecting screw 15 is also screwed into the cylindrical nut 21 as predetermined, and the wall-hanging bracket 6 can be properly fixed to the rear cabinet 1B. it can.

Further, the cylindrical nut 21 and the electrical component 4 of the liquid crystal module 2 are provided by the bottomed cylindrical pocket 22.
Is shielded between the cylindrical nut 21 and the connecting screw 15 and the electrical component 4.
Can be made sufficiently small based on safety standards to meet the demand for thinner cabinet 1.

Moreover, the tapered tapered tip of the cylindrical nut 21 is the small diameter portion 2 on the far end side of the pocket 22.
By being inserted into 2a, the cylindrical nut 21 can be positioned further concentrically with respect to the back end side small diameter portion 22a.

Further, the back end of the screw hole 24 of the cylindrical nut 21 is closed by the bottom wall portion 21c. Even if the long connecting screw 15 is screwed into the screw hole 24 by mistake, Since the tip hits the bottom wall portion 21c and is not screwed any further, the bottomed cylindrical pocket 22 is not damaged by the long connecting screw 15 which is mistakenly made.
2 can be reliably maintained.

The flange 21d formed integrally with the outer peripheral surface of the base end of the cylindrical nut 21 is pressed against the bottom surface 23a of the recess 23, so that the screwing of the cylindrical nut 21 into the pocket 22 can be prevented from loosening, and the flange The screwing of the cylindrical nut 21 can be further prevented from being loosened by the anti-slip groove 25 formed on the concave facing surface of 21d.

Furthermore, a tool such as a spanner is engaged with a polygonal head 21e formed concentrically and integrally with the base end of the cylindrical nut 21, or a plus driver (or minus driver) is inserted into the operation groove 27 of the head 21e. By engaging, the screwing operation of the cylindrical nut 21 can be easily performed.

As shown in FIG. 3, the wall hanging bracket 6 is press-contacted to the head 21 e of the cylindrical nut 21, so that the distance m between the wall hanging bracket 6 and the screw hole 24 of the cylindrical nut 21 is reduced. The wall hanging bracket 6 can be firmly fixed to the rear cabinet 1B.

1 cabinet 1A front cabinet 1B rear cabinet 2 liquid crystal module (display unit)
DESCRIPTION OF SYMBOLS 3 Control board 4 Electrical component 5 Connecting member 6 Wall bracket 15 Connecting screw 21 Cylindrical nut 21a Male screw part of cylindrical nut 21b End face of cylindrical nut 21c Bottom wall part of cylindrical nut 21d Flange of cylindrical nut 21e Head portion of cylindrical nut 22 Pocket 22a Small-diameter portion on back end side of pocket 22b Large-diameter portion on open end side of pocket 23 Recess 23a Bottom surface of recess 24 Screw hole 25 Non-slip groove 26 Head through-hole 27 Operation groove

Claims (7)

In a thin display device in which a wall mounting bracket is fixed to a surface of the rear cabinet of a synthetic resin cabinet composed of a front cabinet and a rear cabinet having a display device body having a control board with electric parts attached therein by a plurality of connecting members. The connecting member has a cylindrical nut having a male thread portion formed on the outer peripheral surface thereof, and a connecting screw screwed into the cylindrical nut, and a bottomed cylindrical pocket is integrally formed at a suitable position on the surface of the rear cabinet, The pocket is divided into a back end side small diameter part whose inner diameter is smaller than the outer diameter of the male thread part, and an open end side large diameter part whose inner diameter is the same as or slightly larger than the outer diameter of the male thread part. A cylindrical nut is screwed into the small diameter part on the back end side through the large diameter part on the side, and the connecting screw is screwed into the cylindrical nut through the screw insertion hole of the wall mounting bracket. Thin display device, characterized in that had Unishi. The thin display device according to claim 1, wherein an outer peripheral surface of a tip end portion of the cylindrical nut is tapered and tapered. The thin display device according to claim 1, wherein a bottom wall portion that closes a back end of a screw hole of the cylindrical nut is integrally formed with the cylindrical nut. A recess having an inner diameter larger than the inner diameter of the pocket is formed on the periphery of the opening end of the pocket on the surface of the rear cabinet, and a flange facing the bottom surface of the recess is integrally formed on the outer peripheral surface of the proximal end of the cylindrical nut, 4. A thin display device according to claim 1, wherein a cylindrical nut is screwed into the pocket so that the flange is pressed against the bottom surface of the recess. The thin display device according to claim 4, wherein a non-slip groove is formed on a concave-facing surface of the flange. A polygonal head is integrally formed at the base end of the cylindrical nut, and a through-hole penetrating in the center of the head is formed with a diameter larger than the screw hole of the cylindrical nut and concentric with the screw hole. A thin display device according to any one of claims 1 to 5. The thin display device according to claim 6, wherein a plus or minus operation groove is formed on an end face of the head.

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