JP2008066909A - Vibration control equipment and thin display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection structure provided with vibration control equipment preventing vibrations from being transmitted from a speaker unit to a thin display device in the thin display device in which the speaker unit is attached to a display device main body by a screw through a bracket metal fitting projected on the speaker unit. <P>SOLUTION: In order to impart an appropriate compression amount to a vibration control ring used in combination with a connection screw, a gap part is formed at the outer edge part of an adjustment nut and the vibration control ring. By tightening the adjustment nut, the adequacy of the compression amount imparted to the vibration control ring is visually detected by the gap between the adjustment nut and the vibration control ring. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to an anti-vibration device and a thin display device such as a liquid crystal television.

In recent years, with the trend of increasing the display screen size of thin display devices such as television receivers, the sound output from speakers has also increased, and vibrations generated from the speakers arranged in the thin display devices have caused cabinets to be This is transmitted to the image display device via the route, causing the reproduction quality of the image to deteriorate. In a liquid crystal television having a liquid crystal display panel as an image display device, the thickness of a liquid crystal layer filled in a gap of several microns between two glass plates constituting the liquid crystal display panel varies partially and unstablely due to vibration. For this reason, striped and nonuniform luminance pattern noise is generated. For this reason, the speaker unit in which the speaker is housed in a separate cabinet is made detachable from the cabinet of the thin display device body, and the speaker unit is attached to the thin display device body via the vibration absorbing member, so that vibration from the speaker unit is Transmission to the liquid crystal display panel of the thin display device body is prevented.

In order to further suppress vibration transmitted from the speaker unit to the thin display device main body, as shown in FIGS. 2 and 3, a stepped screw 17 is inserted into the screw hole of the bracket fitting 5 assembled integrally with the speaker unit 3. The rear cabinet 6 is clamped and fixed to the front cabinet 13 by screwing. When the stepped screw 17 is inserted through a rubber vibration isolation ring 18 and the speaker unit 3 is attached to the cabinet, the vibration isolation ring 18 is appropriately compressed in the thickness direction by the screw head of the stepped screw 17. The vibration from the speaker unit 3 is appropriately absorbed.

However, in the mounting structure shown in FIG. 2 and FIG. 3, the length of the large diameter portion of the stepped screw 17 which is a component, the thickness of the bracket metal fitting 5, the fitting portion 7, and the rear cabinet 3 are included. Due to dimensional tolerances, when the amount of compression of the anti-vibration ring 18 is large between individuals and the amount of compression of the anti-vibration ring 18 is low, a gap is generated between the component parts, causing unstable contact. It becomes a noise generation source. On the other hand, when the vibration isolating ring 18 is excessively compressed, the elasticity of the vibration isolating ring 18 is lowered and an appropriate vibration absorbing characteristic cannot be exhibited.

Therefore, as shown in FIG. 8, conventionally, in order to adjust the tightening amount of the adjustment nut 52 and to give an appropriate compression amount to the vibration isolating ring 18, a tightening restriction is previously provided on the side surface of the vibration isolating ring 18. The jig 54 is brought into contact, tightened until the lower surface of the adjustment nut 52 comes into contact with the upper end of the tightening restriction jig 54, and the tightening restriction jig 54 is pulled out after the adjustment nut 52 is tightened. I needed work.

In view of such a situation, as seen in Japanese Patent Application Laid-Open No. 2001-21042, a protrusion is provided on the packing, and due to excessive tightening of the nut, a change in tightening torque caused by contact with the protrusion provided on the packing is observed. As a result, it has been devised to prevent the packing from being excessively reduced in diameter. However, it is considered that considerable experience and skill are required to accurately detect changes in the tightening torque of the nut and to ensure high reproducibility of the tightening work results.
Japanese Patent Application Laid-Open No. 2001-21042 “Mechanical Pipe Fitting”

In large-screen televisions, the connecting part between the speaker unit and the thin display device body provides the required strength, facilitates assembly work in the production process, and displays vibration from the speaker unit in a thin display. It was necessary not to transmit to the device body. Therefore, an object of the present invention is to provide a connection structure including a vibration isolator that does not transmit vibration of a speaker unit to a thin display device body.

  In a thin display device in which a speaker unit is attached to a display device main body with a screw via a bracket fitting protruding from the speaker unit, a rubber vibration isolator sandwiched between a screw head of the attachment screw and the bracket fitting. Visible display of ring compression. For example, an annular part that does not contact each other is formed on the outer edge of the vibration isolation ring surface and the outer edge of the adjustment nut surface, and the compression nut reaches the proper level by tightening the adjustment nut. When this occurs, it is visually detected that the outer edge of the adjustment nut surface and the outer edge of the vibration isolation ring surface have come into contact, and the operator detects that the compression amount of the vibration isolation ring has reached an appropriate level. And tightening work is stopped.

The thickness of the vibration isolator ring compressed by tightening the adjustment nut does not change the outer edge of the anti-vibration ring and the height of the outer edge of the anti-vibration ring. An annular slit is formed at the boundary between the vibration isolating ring surface that comes into contact and the vibration isolating ring surface that does not come into contact with the adjustment nut surface. This prevents changes in the thickness of the vibration isolator ring that contacts the adjustment nut surface from affecting the height of the outer edge of the vibration isolator ring, enabling more accurate compression detection. It becomes.

The outer edge of the anti-vibration ring surface and the outer edge of the adjustment nut surface form thread-like projections facing the adjustment nut surface on the anti-vibration ring side of the annular part that is not in contact with each other. When the amount of compression of the ring reaches an appropriate level, the tip of the thread-like protrusion formed on the vibration-proof ring comes into contact with the adjustment nut surface, and it is visually detected that the thread-like protrusion is inclined and deformed. The operator detects that the amount of compression of the vibration ring has reached an appropriate level, and stops the tightening operation. Furthermore, a reference projection that is parallel to and lower than the thread projection in the vicinity of the thread projection and a vibration isolation ring surface and an annular portion where the outer edges of the adjustment nut surface are not in contact with each other. By forming on the ring side, fine adjustment is possible by visually reading the inclination angle of the thread-like protrusion while referring to the reference protrusion, and adjustment accuracy can be improved.

  As described above, according to the present invention, when the bracket fitting projecting from the speaker unit is screwed to the display device main body, the bracket fitting screw is sandwiched between the screw head of the bracket fitting mounting screw and the bracket fitting surface. By visualizing the tightening amount of the adjustment nut for compressing the rubber anti-vibration ring, it is possible to apply an appropriate amount of compression to the anti-vibration ring and transmit vibration from the speaker to the image display device. Is suppressed, and even when the vibration from the speaker is large, it is possible to prevent the display quality of the display screen from being impaired.

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 top view, and FIG. 1 (c) is a left side view. is there. As shown in the figure, 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 speaker unit 3 in FIG. 1, and FIG. 3 is a perspective view of FIG. FIG. 4 is a perspective view showing a single unit before the 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 speaker unit 3 with screws. The front surface on the front end side of the bracket metal fitting 5 is in contact with the inclined surface of 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 surfaces are 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. The fitting portion 7 is fixed to the bracket metal fitting 5 by a screw (not shown). Two places on the upper and lower sides of the fitting part 7 protrude forward in a columnar shape to form a fitting convex part 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 stepped screw 17 shown in FIG. 5 is inserted into the rear screw hole 11 from the rear surface of the bracket metal fitting 5. The stepped screw 17 is formed with a large-diameter portion 17 b at the rear end of the male screw portion 17 a at the tip, and the large-diameter portion 17 b is inserted through the rubber vibration-proof ring 23, the adjustment nut 22, and the spring washer 51. , Is in contact with the lower surface of the screw head 17c. The stepped screw 17 inserted into the rear screw hole 11 has a male screw portion 17 a at the tip thereof passing through the front screw hole 12 of the fitting recess 9 and screwed to the nut fitting 16 in the front cabinet 13. The bracket fitting 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 isolating ring 23 is adjusted in the thickness direction by the screw head 17c via the adjusting nut 22 and the spring washer 51. It is in a compressed state. 2 and 3 show a state in which the lower portion of the bracket metal fitting 5 is attached by the stepped screw 17, but as shown in FIG. 4, the upper portion of the bracket metal fitting 5 also has a stepped screw 17 by the same structure. Thus, the rear cabinet 6 is clamped and fixed to the front cabinet 13. A bracket cover 19 made of resin is screwed to the rear side surface of the bracket metal member 5 attached to the rear cabinet 6 by the stepped screw 17.

In this way, the 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 so that vibration from the speaker unit 3 is stepped with the bracket metal fitting 5. The vibration is absorbed by the vibration isolation ring 23 sandwiched between the screw 17 and the screw head 17c. Similarly, since the vibration isolating spacer 10 is sandwiched between the contact surface of the front end portion of the bracket metal 5 and the rear cabinet 6, the vibration of the bracket metal 5 is absorbed by the vibration isolating spacer 10 and attenuated. The vibration of the bracket metal 5 is absorbed by the vibration isolating spacer 10, but a part of the vibration is transmitted to the nut metal 16 via the stepped screw 17 but is buffered by the front cabinet 13 made of resin. As a result, vibration transmitted from the speaker unit 3 to the liquid crystal panel 20 supported by the front cabinet 13 is suppressed, the display quality of the display screen is prevented from being impaired, and an increase in the output of the speaker can be dealt with. In the illustrated example, the connection between the left speaker unit 3 and the liquid crystal television main body 2 is described, but the connection between the right speaker unit 4 and the liquid crystal television main body 2 is the same.

FIG. 5A shows a first embodiment of the present invention regarding a stepped screw 17, a spring washer 51, an adjustment nut 22, and an anti-vibration ring 23 for screwing a speaker unit to a cabinet via a bracket made of sheet metal. It is a perspective view which shows the detail of embodiment, FIG.5 (b) is a longitudinal cross-sectional view. In FIG. 5B, the adjustment nut 22 is pivotally attached to the large-diameter male screw portion 17d of the screw 17, and the upper surface of the adjustment nut 22 is pressed downward by the screw head 17c via the spring washer 51 to prevent loosening. Yes. The lower surface of the adjusting nut 22 is in contact with the upper surface of the vibration isolating ring 23, but the outer edge portion has an annular protrusion 22a whose pivot is the pivot, and the vibration isolating ring 23 is in contact with the annular protrusion 22a. The notch part 23a is provided so that it may not.

As shown in FIG. 5B, in a state where the vibration isolating ring 23 is not compressed by the adjustment nut 22, the tip of the annular protrusion 22 a on the outer edge of the adjustment nut 22 and the upper surface of the notch 23 a of the vibration isolation ring 23 Are separated by a gap indicated by “A” in FIG. Next, when the adjustment nut 22 is tightened, the adjustment nut 22 is displaced downward, and an appropriate amount of compression is applied to the vibration isolation ring 23, the tip of the annular protrusion 22a on the outer edge of the adjustment nut 22 is subjected to vibration isolation. It is possible to visually detect that an appropriate amount of compression has been applied to the vibration isolation ring 23 by contacting the upper surface of the notch 23a of the ring 23.

FIG. 6 is a longitudinal sectional view showing a second embodiment of the present invention. The thickness of the vibration isolating ring 24 compressed by tightening the adjusting nut 22 changes to the outer edge of the vibration isolating ring, and the height of the outer edge of the vibration isolating ring indicated by “B” in FIG. 6 changes. In order to prevent this, an annular slit 24 a is formed at the contact surface between the adjustment nut 22 and the vibration isolation ring 24 and the boundary portion of the outer edge where the adjustment nut 22 and the vibration isolation ring 24 surface do not contact. Thereby, it is possible to avoid the change in the thickness dimension of the vibration isolating ring 24 due to the tightening of the adjusting nut 22 from affecting the height dimension of the outer edge portion of the vibration isolating ring 24, and a more accurate compression amount. Detection is possible.

Next, a third embodiment of the present invention is shown in FIG. FIG. 7B shows a top view of the vibration isolating ring 25, and a plurality of thread-like protrusions 25 a are arranged at equal intervals in the notch 25 c on the outer edge of the vibration isolating ring 25. As shown in FIG. 6A, the lower end of the adjustment nut 26 and the tip of the thread-like protrusion 25a disposed on the upper surface of the notch 25c of the vibration isolating ring 25 are “C” shown in FIG. Are separated by a gap.

When the adjustment nut 52 is tightened in the direction indicated by the dotted arrow in FIG. 7C, the adjustment nut 52 is displaced downward, and the vibration isolation ring 25 is compressed. When the amount of displacement of the adjustment nut 52 reaches the same as “C” in FIG. 7A and the lower surface of the adjustment nut 52 comes into contact with the tip of the thread-like protrusion 25a, as shown in FIG. The thread-like protrusion 25a formed of an elastic member is inclined, and it can be visually and intuitively detected that the compression amount of the vibration isolating ring 25 has reached an appropriate level.

Further, as a fourth embodiment of the present invention, the reference protrusion 25b is arranged upright in the vicinity of the thread-like protrusion 25a formed in the notch 25c of the vibration isolating ring 25. The height of the reference protrusion 25b is lower than that of the thread-like protrusion 25a, and “D” and “C” shown in FIG. 7 are set to have a relationship of D> C. When the adjustment nut 52 is tightened, the adjustment nut 52 is displaced downward, the lower surface of the adjustment nut 52 comes into contact with the tip of the thread-like protrusion 25a, and when the thread-like protrusion 25a is inclined, the upright reference protrusion 25 is referred to. However, the inclination amount of the thread-like protrusion 25a can be detected visually and intuitively, and fine adjustment can be made from the inclination angle of the thread-like protrusion 25a.

In the present invention, when fastening an object to be fastened to an object to be fastened by a mounting screw, it is used to prevent mechanical vibration generated from either the fastening object or the object to be fastened from being transmitted to the other. As an embodiment of the means for preventing the vibration absorbing function from being lowered by excessively tightening the mounting screw, the vibration isolating ring is described in the fastening with the liquid crystal television and the attached speaker unit. It is suitable for application to optical pickups such as HDDs and DVDs that require anti-vibration structures, portable electronic devices, and in-vehicle electronic devices.

FIG. 2 is an external view when the present invention is applied to a large-screen side speaker type liquid crystal television, in which FIG. (A) is a front view, (b) is a top view, and (c) is a left side view. It is a cross-sectional view which shows the attachment part of the left 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 speaker unit. FIG. 5A is a perspective view and FIG. 5B is a longitudinal sectional view of the stepped screw portion showing the first embodiment of the present invention shown in FIGS. It is a longitudinal cross-sectional view of the stepped screw part which shows 2nd Embodiment by this invention. (A) which shows 3rd and 4th embodiment by this invention is a longitudinal cross-sectional view of a stepped screw part, (b) is a top view of a vibration-proof ring, (c) is the state which tightened the adjustment nut FIG. It is a longitudinal cross-sectional view of the stepped screw part by a prior art.

Explanation of symbols

1: Stand 2: LCD TV body 3, 4: Speaker unit 5: Bracket bracket 6: Rear cabinet 7: Fitting part 8: Fitting convex part 9: Fitting concave part 10: Anti-vibration spacer 11: Rear screw hole 12: Front screw hole 13: Front cabinet 16: Nut fitting 17: Stepped screw 17a: Male screw portion 17b: Large diameter portion 17c: Screw head portion 17d: Large diameter male screw portion 18: Anti-vibration ring 19: Bracket cover 20: Liquid crystal panel 22: Adjustment nut 22a: Annular protrusion 23: Anti-vibration ring 23a: Notch 24: Anti-vibration ring 24a: Annular slit 25: Anti-vibration ring 25a: Threaded protrusion 25b: Reference protrusion 25c: Notch 51: Spring washer 52 : Adjustment nut 54: Tightening restriction jig

Claims (5)

In a vibration isolator and a thin display device in which a speaker unit is attached to a display device main body with a screw via a bracket metal fitting protruding from the speaker unit, the thin film display device is sandwiched between a screw head of the attachment screw and a bracket metal fitting. A vibration isolator and a thin display device comprising means for visually detecting a compression amount of a rubber anti-vibration ring. 2. The vibration isolator and the thin display device according to claim 1, wherein the anti-vibration ring surface and the adjustment nut surface face the annular portions that do not contact each other, the vibration isolation ring surface and / or the adjustment nut surface that face each other. And a thin display device. 3. The vibration isolator according to claim 2, and a thin display device, wherein an annular slit is formed at a boundary portion between a vibration isolating ring surface on which the adjustment nut surface abuts and a vibration isolating ring surface on which the adjustment nut surface does not abut. Anti-vibration device and thin display device. 4. The anti-vibration device according to claim 2 and the thin display device, wherein an adjustment nut is provided on an anti-vibration ring side of an annular portion where an outer edge portion of the anti-vibration ring surface and an outer edge portion of the adjustment nut surface do not contact each other. An anti-vibration device and a thin display device, characterized in that a thread-like protrusion facing the surface is formed. 5. The vibration isolator and the thin display device according to claim 4, wherein a reference protrusion parallel to the thread protrusion and lower in height than the thread protrusion is provided in the vicinity of the thread protrusion, the vibration isolation ring surface, and the adjustment nut surface. An anti-vibration device and a thin display device, characterized in that they are formed on the anti-vibration ring side of an annular portion in which the outer edge portions do not contact each other.

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