JP4508805B2 - Thin display device - Google Patents

Description

  The present invention relates to a thin display device such as a liquid crystal television, and more particularly to a thin display device in which speaker units are attached to left and right and up and down parts.

In recent years, thin display devices such as liquid crystal televisions and PDP televisions tend to have larger screens. With the increase in screen size, the output of audio has increased. When the speaker is enlarged and has a large output, the vibration of the speaker is transmitted to the television body, and particularly when it is transmitted to a thin display device, the display quality may be deteriorated depending on the degree of vibration and the vibration frequency. For this reason, in a large-screen flat-screen television, speakers have been arranged on both sides of the screen or below the screen as a structure separated from the television body.

Conventionally, a “television receiver” described in Patent Document 1 is known in which speakers are arranged on the left and right sides of a television body.
Japanese Patent Laid-Open No. 06-070269

In these large-screen flat-screen TVs, the structure of the connecting part between the speaker unit and the TV body, which is a single structure, provides the required strength and is easy to work in the assembly process. It was necessary for vibration not to be transmitted to the TV body. Accordingly, an object of the present invention is to provide a thin display device having a connection structure in which vibration of a speaker unit is difficult to be transmitted to a television body.

  In order to solve the above-described problems, the present invention provides a bracket and a display device for fixing the bracket bracket in a thin display device in which the speaker unit is attached to the display device main body with a screw via a bracket bracket protruding from the speaker unit. Are fixed to different parts of the cabinet of the thin display device, respectively.

  In addition, the present invention provides a thin display device in which a speaker unit is attached to a display device body with a screw through a bracket fitting protruding from the speaker unit, and a rubber vibration isolator is provided between the head of the screw and the bracket fitting. It is characterized by sandwiching a ring.

Further, the present invention provides a metal plate bracket fitting projecting from the side of the speaker unit on the display device main body side, and is formed on the front side of the front end of the bracket fitting so as to come into contact with the rear cabinet surface of the display device main body. A contact surface, a resin fitting projection protruding forward at at least two positions on the front side near the base end of the bracket fitting, and the bracket fitting at the center of the fitting projection A fitting that is formed in a position corresponding to the fitting protrusion at the end of the rear cabin net of the display device body and the rear screw hole that penetrates and penetrates in the front-rear direction and is fitted into the fitting protrusion. A mating recess, a front screw hole formed in the center of the fitting recess in the front-rear direction, and disposed in front of the front screw hole and supported by the front cabin net or the rear cabin net of the display device body Female screw at the position corresponding to the front screw hole And a stepped screw having a large-diameter portion at the rear end of the male screw portion, and the front male screw portion is inserted into the rear screw hole and the front screw hole from the rear surface of the bracket metal fitting. A stepped screw screwed into the female screw hole of the metal fitting, a rubber vibration-proof ring sandwiched between the head of the stepped screw and the rear surface of the bracket metal fitting, and a contact surface of the bracket metal fitting And an anti-vibration spacer made of rubber sandwiched between the rear cabinet surface of the display device main body.

Here, the vibration isolating ring can be attached to the lower surface of the head of the screw or the stepped screw. Further, an adjustment in which the front surface abuts on the vibration isolating ring is provided between the screw or the head of the stepped screw and the vibration isolating ring via a position adjusting means capable of adjusting the position of the screw in the axial direction. It is also possible to adjust the amount of compression of the vibration isolation ring by attaching a panel.

  In addition, a male screw portion threaded into the lower neck portion of the screw or the stepped screw near the head, a spring washer inserted into the outer side of the male screw portion, and a screw threaded into the male screw portion in front of the spring washer. And an adjustment nut having an abutting surface formed on the front surface for abutting against the vibration isolation ring, and the compression nut can be adjusted by rotating the adjustment nut. .

Furthermore, the anti-vibration spacer can be attached to the contact surface of the bracket bracket,
It is also possible to attach a bracket cover to the rear surface of the bracket fitting.

  As described above, according to the present invention, when the bracket bracket projecting from the speaker unit is screwed to the display device body, the bracket unit is provided with a nut bracket for attaching the bracket bracket to the cabinet of the thin display device body. By attaching the display device fixing frame to another part of the cabinet, the bracket metal fitting is not directly connected to the display device fixing frame for fixing the thin display device, so that the vibration generated from the speaker is applied to the display device. In addition to making it difficult to transmit, the speaker unit can be attached to the thin display device main body while maintaining the strength of attaching the speaker unit.

In addition, the rubber vibration isolating ring is sandwiched between the bracket bracket mounting screw head and the bracket bracket, making it difficult for the vibration generated from the speaker to be transmitted to the display device, and even when the speaker vibration is large The display quality of the screen is not impaired.
In addition, since the compression amount of the vibration isolating ring can be adjusted, it is always possible to adjust the compression amount to be optimal for absorbing vibration even if the screw mounting portion has a variation in dimensions.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an external view when the present invention is applied to a large-screen side-speaker type liquid crystal television. FIG. 1 (a) is a front view, FIG. 1 (b) is a plan view, and FIG. FIG. As shown in the figure, side speaker units 3 and 4 are attached to the left and right ends of the liquid crystal television main body 2 supported by the stand 1. 2 is a cross-sectional view showing a mounting portion of the left side speaker unit 3 on the left side of FIG. 1, and FIG. 3 is a perspective view of FIG. 4 and 5 are perspective views showing a single state before the side speaker unit 3 is attached.

As shown in FIGS. 2 and 3, a bracket 5 made of sheet metal is integrally attached to the right side surface of the side speaker unit 3 by screws. The front surface of the bracket metal fitting 5 is in contact with a surface inclined obliquely forward at the left end of the rear cabinet 6 of the liquid crystal television main body 2. The rubber vibration isolating spacers 10 are attached to the abutting surface at two locations, upper and lower, and the abutting surface is supported by the rear cabinet 6 via the vibration isolating spacer 10. On the front surface on the base end side of the bracket metal 5 with respect to the contact surface, a fitting portion 7 is formed which is built up with resin. Although not shown, the fitting portion 7 is fixed to the bracket metal fitting 5 with screws. Two fitting upper and lower portions of the fitting portion 7 protrude forward in a columnar shape to form a fitting convex portion 8. The fitting convex part 8 is detachably fitted to the fitting concave part 9 formed in the rear cabinet 6 corresponding to this shape.

A rear screw hole 11 is formed in the center portion of the fitting convex portion 8 so as to penetrate the bracket metal fitting 5 in the front-rear direction. Similarly, a front screw hole 12 is formed in the center of the fitting recess 9 of the rear cabinet 6 so as to pass through the rear screw hole 11 in the front-rear direction. A nut fitting 16 shown in FIG. 6 is attached in the space portion of the front cabinet 13 in front of the front screw hole 12. The nut fitting 16 has a female screw hole 16 a formed in the boss portion 16 e and can increase the fastening force when attached to the stepped screw 17. Reference numerals 16b to 16d in the figure denote attachment holes for fixing the nut fitting 16 to the front cabinet 13 with screws.

The outer periphery of the liquid crystal panel 20 is sandwiched between a liquid crystal panel fixed lower frame 23 and a liquid crystal panel fixed upper frame 24. A plurality of optical sheets 26 are arranged on the back surface of the liquid crystal panel 20 by being positioned by protrusions from the lower frame 23 for fixing the liquid crystal panel. A lamp shield plate 25 is attached to the upper and lower fixed frames 23 and 24 to form a backlight together with a fluorescent tube (not shown), and a liquid crystal composed of the liquid crystal panel 20 / the upper and lower fixed frames 23 and 24 / the optical sheet 26 / the lamp shield plate 25. The panel unit is fixed to the front cabinet 13. As described above, the upper and lower fixing frames 23 and 24 for fixing the liquid crystal panel 20 and the nut fitting 16 for fixing the bracket fitting 5 are respectively fixed to different parts of the front cabinet 13 so that vibrations from the speaker are directly transmitted through the fitting. It is not transmitted to the liquid crystal panel 20 and is buffered by the front cabinet 13 made of resin, so that the display quality of the display screen is not impaired and it is possible to cope with an increase in the output of the speaker.

A stepped screw 17 shown in FIG. 7 is inserted into the rear screw hole 11 from the rear surface of the bracket metal fitting 5. The stepped screw 17 has a large-diameter portion 17b formed at the rear portion of the male screw portion 17a at the tip, and a rubber vibration-proof ring 18 is inserted into the large-diameter portion 17b and bonded to the lower surface of the head portion 17c. . The stepped screw 17 inserted into the rear screw hole 11 has a male screw portion 17a at the tip passing through the front screw hole 12 of the fitting recess 9 and screwed to the boss portion 16e via the female screw hole 16a of the nut fitting 16. As a result, the bracket metal part 5 sandwiches the rear cabinet 6 and is fixed to the front cabinet 13.

At this time, the male screw portion 17a of the stepped screw 17 is screwed to the nut fitting 16 up to its root, and the vibration isolation ring 18 is compressed in the thickness direction by the head portion 17c. 2 and 3 show that the lower part of the bracket metal fitting 5 is attached by the stepped screw 17, but as shown in FIG. 4, the upper part of the bracket metal fitting 5 is also provided with a stepped screw by the same structure. The rear cabinet 6 is sandwiched by 17 and fixed to the front cabinet 13. A resin bracket cover 19 is screwed to the rear surface of the bracket metal member 5 attached to the rear cabinet 6 by the stepped screw 17 as shown in FIG.

FIG. 8 shows a plate nut 21 having the same function as the nut fitting 16 described above, and is used when attaching a speaker unit that does not require a particularly large fastening force. In the figure, 21a is a female screw hole into which the stepped screw 17 is screwed, and 21b to 21d are attachment holes for fixing the plate nut 21 to the front cabinet 13 with screws.

  By the way, as shown in FIG. 2, the bracket metal fitting 5 is fastened to the front cabinet 13 and the rear cabinet 6 by using the stepped screw 17, and the rubber fitting between the head 17 c of the stepped screw 17 and the bracket metal fitting 5 is used. When the anti-vibration ring 18 is clamped, the anti-vibration ring 18 is compressed in the thickness direction. At this time, the compression amount of the vibration isolating ring 18 is preferably an appropriate compression amount capable of absorbing vibration from the speaker unit. The amount of compression is determined by analytical calculation and experimental values, and the hardness of the rubber material forming the vibration isolation ring 18, the cross-sectional dimension of the vibration isolation ring 18, and the neck size of the stepped screw 17 are determined.

However, as described above, even if the dimensions of the vibration isolating ring 18 and the under-head dimension of the stepped screw 17 that can obtain the optimum vibration isolating effect are determined, in the actual assembly line, the anti-vibration ring 18 is scheduled after assembly. The value of the compression amount thus obtained cannot be obtained, and the compression amount may be excessive or insufficient. This is because the front cabinet 13 and the rear cabinet 6 through which the stepped screws 17 are inserted are molded products and are flat and screw holes are formed at the ends thereof. This is because there is variation in the position in the front-rear direction of the nut fitting 16 with respect to the rear screw hole 11 of the bracket fitting 5.

  Therefore, in the present invention, in order to eliminate the variation in the protruding amount of the stepped screw head from the bracket metal fitting 5 that presses the bracket metal fitting 5 through the vibration isolating ring, the lower neck portion of the stepped screw near the head portion. A male screw part was formed in the screw, and an adjustment nut was screwed into the screw part, so that the compression amount of the vibration isolating ring could be adjusted. FIG. 9 is a cross-sectional view showing a mounting state of a stepped screw having a compression amount adjusting function. As shown in the figure, the stepped screw 27 that presses and holds the bracket metal member 5 is formed with a long neck lower part by inserting the adjustment nut 29 and the spring washer 30, and a male screw part is formed in the vicinity of the head part 27c. ing.

  When assembling the stepped screw 27 to the bracket metal fitting 5, first, the spring washer 30 is inserted into the lower neck portion, the adjustment nut 29 is screwed, and the spring washer 30 is compressed to make the head as much as possible. It is screwed in to the vicinity of 27c. Next, after the vibration-proof ring 28 is inserted, the vibration-proof ring 28 is inserted into the bracket metal fitting 5, and the tip of the stepped screw 27 is screwed onto the nut metal fitting 16 through the rear screw hole 11 and the front screw hole 12. At this time, since the adjustment nut 29 on the head 27c side of the stepped screw 27 is positioned closer to the head 27c, the adjustment nut 29 and the vibration isolating ring 28 are separated from each other, and a gap is formed therebetween. State.

  Here, an adjustment spacer 31 having a predetermined thickness is inserted between the adjustment nut 29 formed larger in diameter than the vibration isolation ring 28 and the upper surface of the bracket metal fitting 5, and then the adjustment nut 29 is rotated. The vibration-proof ring 28 is compressed by lowering. When the adjustment nut 29 comes into contact with the adjustment spacer 31, the descent is stopped and the vibration isolation ring 28 is compressed to the target compression amount. That is, the thickness of the adjustment spacer 31 is set in advance to a thickness equal to the state in which the vibration isolating ring 28 is compressed to the optimum thickness. As described above, since the compression amount adjusting function is provided on the head portion 27c side of the stepped screw 27, even if the mounting portion of the stepped screw 27 has a dimensional variation, the vibration isolation ring 28 has a predetermined vibration isolation effect. It becomes possible to adjust to the optimal compression amount obtained.

  In the embodiment of FIG. 9, the adjustment nut 29 is used to adjust the compression amount of the vibration isolation ring 28, but a plurality of disc-shaped spacers having different thicknesses are prepared instead of the adjustment nut 29. In this case, it is possible to select and insert a spacer having an optimum thickness between the head of the stepped screw and the vibration-proof ring 28. In this case, it is an effective method when the dimensional variation of the mounting part of the stepped screw is the same for each assembly lot, and it is possible to insert a spacer before inserting the stepped screw. It becomes.

In this way, when the side speaker unit 3 sandwiches the rear cabinet 6 of the liquid crystal television main body 2 via the bracket metal fitting 5 and is fixed to the front cabinet 13, vibrations in the front-rear direction occur from the side speaker unit 3. It is absorbed by the vibration isolating rings 18 and 28 sandwiched between the bracket 5 and the heads 17c and 27c of the stepped screws 17 and 27. Similarly, since the vibration isolating spacer 10 is sandwiched between the contact surface of the front end portion of the bracket metal fitting 5 and the rear cabinet 6, the vibration of the bracket metal fitting 5 is absorbed by the vibration isolating spacer 10 before the rear cabinet. 6 is attenuated. The vibration of the bracket 5 is absorbed by the vibration isolation spacer 10, but part of it is also transmitted to the nut 16 via the stepped screws 17 and 27.

However, the nut fitting 16 is fixed to a portion different from the upper and lower fixing frames 23 and 24 for fixing the liquid crystal panel 20 on the front cabinet 13, so that vibration from the speaker is not directly transmitted to the liquid crystal panel 20 through the fitting. It will be buffered by the front cabinet 13 made of resin. As a result, the liquid crystal panel 20 supported by the front cabinet 13 has less vibration transmitted from the side speaker unit 3, the display quality of the display screen is not impaired, and the output of the speaker can be increased. Become. In the illustrated example, the connection between the left side speaker unit 3 and the liquid crystal television main body 2 is described. However, the connection between the right side speaker unit 4 and the liquid crystal television main body 2 is exactly the same.

  The present invention can be used for an under speaker type thin display device in addition to a side speaker type thin display device.

It is an external view at the time of applying this invention to the side speaker type | mold liquid crystal television of a large screen, A figure (a) is a front view, A figure (b) is a top view, A figure (c) is a left view. It is a cross-sectional view which shows the attachment part of the left side speaker unit of FIG. FIG. 3 is a perspective view of FIG. 2. It is a perspective view which shows the single-piece | unit state before attachment of a side speaker unit. It is a perspective view which shows the single-piece | unit state before attachment of a side speaker unit. FIG. 4 is an external view of the nut fitting shown in FIGS. 2 and 3. FIG. 4 is a perspective view of the stepped screw shown in FIGS. 2 and 3. It is a perspective view of a plate nut. It is a cross-sectional view which shows other embodiment of the attachment part of a side speaker unit.

Explanation of symbols

1 stand

2 LCD TV

3, 4 Side speaker unit

5 Bracket bracket

6 Rear cabinet

7 Fitting part

8 Fitting projection

9 Fitting recess

10 Anti-vibration spacer

11 Rear screw hole

12 Front screw hole

13 Front cabinet

16 Nut bracket

17 Stepped screw

17a Male thread

17b Large diameter part

17c head

18 Anti-vibration ring

19 Bracket cover

20 LCD panel

21 Plate nut

23 LCD panel fixed lower frame

24 LCD panel fixed upper frame

25 Lamp shield plate

26 Optical sheets 27 Stepped screw 27c
Head 28 Anti-vibration ring 29 Adjustment nut 30 Spring washer 31 Adjustment spacer

Claims (6)

A bracket made of sheet metal protruding from the side of the speaker unit on the display device body side,
A contact surface that is formed on the front side of the front end of the bracket fitting and is in contact with the rear cabinet surface of the display device body;
A resin-made fitting convex part protruding forward at at least two positions on the front side near the base end of the bracket metal fitting,
A rear screw hole drilled in the front-rear direction through the bracket metal fitting in the center of the fitting convex part;
A fitting recess that is formed at a position corresponding to the fitting protrusion at the end of the rear cabin net of the display device body and into which the fitting protrusion is fitted;
A front screw hole drilled in the front-rear direction at the center of the fitting recess;
A nut fitting disposed in front of the front screw hole and supported by the front cabin net or the rear cabin net of the display device body and having a female screw hole formed at a position corresponding to the front screw hole;
A stepped screw having a large-diameter portion at the rear end of the male screw portion, which is inserted into the rear screw hole and the front screw hole from the rear surface of the bracket metal fitting, and the front male screw portion is screwed into the female screw hole of the nut metal fitting. Stepped screws,
A rubber vibration isolating ring sandwiched between the head of the stepped screw and the rear surface of the bracket fitting;
A rubber anti-vibration spacer sandwiched between the contact surface of the bracket bracket and the rear cabinet surface of the display device body;
A thin display device comprising: The thin display device according to claim 1,
A thin display device, wherein the vibration-proof ring is attached to the lower surface of the head of the stepped screw. The thin display device according to claim 1,
Between the head of the stepped screw and the vibration isolating ring, an adjustment panel whose front surface is in contact with the vibration isolating ring is mounted via a position adjusting means capable of adjusting the position of the screw in the axial direction. A thin display device characterized in that the compression amount of the vibration isolating ring can be adjusted. The thin display device according to claim 1,
A male thread portion threaded into the lower neck portion immediately adjacent to the head of the stepped screw;
A spring washer inserted on the outside of the male screw part;
An adjustment nut that is screwed into the male threaded portion in front of the spring washer and has a contact surface that contacts the vibration isolating ring formed on the front surface;
The thin display device is characterized in that the compression amount of the vibration isolation ring can be adjusted by rotating the adjustment nut. The thin display device according to any one of claims 1 to 4,
A thin display device, wherein the vibration isolating spacer is attached to a contact surface of the bracket fitting. The thin display device according to any one of claims 1 to 5,
A thin display device comprising a bracket cover attached to a rear surface of the bracket metal fitting.

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