JP2008071830A - Fan supporting device and video display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fan supporting device for preventing rotation noise of a fan, positioning a heat sink and effective fixing thereof to the heat sink, and also provide a video display provided with the fan supporting device. <P>SOLUTION: The fan supporting device for supporting a fan in opposition to the heat sink for radiating heat generated in the video display is provided with a base part 1 fixed to the heat sink, a pedestal 2 supported with the base part 1 on which the fan is placed, and vibration absorbing rubbers 3, 3, 3 provided between the base part 1 and the pedestal 2. The base part 1 is provided with a first hole and a second hole 11c, 12c for positioning the fixing position for the heat sink. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fan support that supports a fan so as to face a heat sink, and an image display device including the fan support.

  The liquid crystal television has a transmissive liquid crystal panel held in a cabinet, and a direct type backlight unit for illuminating the liquid crystal panel to display an image is disposed on the back side of the liquid crystal panel. . The direct type backlight unit includes a backlight chassis facing the liquid crystal panel, a cold cathode fluorescent tube, an optical sheet, an electric circuit, and the like.

The backlight chassis also serves as a heat sink for dissipating heat generated in the cold cathode fluorescent tube, the electric circuit, and the like. A bridge-type fan support is fixed to the back side of the backlight chassis, and the fan support supports the fan. When the fan rotates, external air is sucked from an air intake hole formed in the lower part of the rear cabinet. The sucked air rises while being warmed along the backlight chassis, and is exhausted to the outside through the exhaust hole (for example, Patent Document 1).
When the fan is provided on the rear cabinet side, it is necessary to wire the front cabinet with the liquid crystal panel, direct type backlight unit, etc., and the rear cabinet, but the fan is provided on the backlight chassis side. Since the wiring is not necessary, assembly and maintenance inspection are facilitated.

In order to exhaust the warmed air to the outside, it is necessary to position the fan support so that the fan provided in the backlight chassis and the exhaust hole formed in the rear cabinet face each other. Therefore, in order to perform the positioning more efficiently, a convex part for positioning the fixing point of the fan support is formed in the backlight chassis, and a hole part that fits the convex part is formed in the fan support. LCD TVs with improved performance have been proposed.
JP 2006-58679 A

  However, when a fan is provided in the backlight chassis, there is a problem that vibration due to the rotation of the fan is transmitted from the backlight chassis to the cabinet and noise is generated.

  In addition, when a vibration isolating member is interposed between the backlight chassis and the fan support to prevent noise, the fan support cannot be positioned with respect to the backlight chassis, and productivity is reduced. There was a problem.

  The present invention has been made in view of such circumstances, and includes a first support member that is provided with a positioning hole or projection, is fixed to a heat sink, and is supported by the first support member and a fan mounted thereon. The second supporting member to be placed is configured as a separate body, and a vibration isolating member is interposed between the first and second supporting members to prevent noise caused by the rotation of the fan and to the heat sink. It is an object of the present invention to provide a fan support that can perform positioning and can efficiently fix the fan support to a heat sink, and an image display device including the fan support.

  Another object of the present invention is to provide a fan support that can more efficiently place the fan at a predetermined position of the second support member by providing the second support member with a clamping piece for clamping the fan. An object of the present invention is to provide an image display device provided with the fan support.

  Another object of the present invention is to provide an anti-vibration member holding portion for holding the anti-vibration member in the second support member, thereby making the anti-vibration member more efficient in the assembly process of the first support member and the second support member. Another object is to provide a fan support that can be interposed between the first support member and the second support member, and a video display device including the fan support.

  Another object of the present invention is to provide an abutting portion with which the interposed vibration isolating member abuts and a leg portion having a screw hole for fixing the fan support to the heat sink on different sides of the support frame. Therefore, when fixing the fan support to the heat sink, the abutment portion does not get in the way, and the fan support that can efficiently fix the fan support to the heat sink and an image including the fan support It is to provide a display device.

  Another object of the present invention is to provide a plurality of anti-vibration members, and to fix the fan support to the heat sink so that the anti-vibration members are unevenly distributed downward, so that the anti-vibration members are unevenly distributed upward. It is an object of the present invention to provide an image display device that can more effectively absorb vibrations or shocks caused by the rotation of a fan as compared with a case where it is fixed.

  A fan support according to the present invention is a fan support that supports a fan so as to face the heat sink, and is supported by the first support member fixed to the heat sink, the first support member, and the fan is placed thereon. And a vibration isolating member interposed between the first support member and the second support member, and the first support member has a hole for positioning a fixing portion with respect to the heat sink. It is characterized by providing a part or a convex part.

  The fan support according to the present invention is characterized in that the second support member includes a holding piece for holding the fan.

  The fan support according to the present invention is characterized in that the second support member includes a vibration isolation member holding portion that holds the vibration isolation member.

  In the fan support according to the present invention, the second support member has a vent hole formed in the center, and is provided in a rectangular placement frame on which the fan is placed, and the placement frame, A clamping piece for clamping the fan, and a vibration isolating member holding part that extends from the mounting frame to the outside of the ventilation hole and holds the vibration isolating member.

  In the fan support according to the present invention, the first support member has a vent hole formed in the center thereof, and is provided on a support frame that supports the second support member and on two opposite sides of the support frame. A contact portion that contacts the vibration isolating member, and a leg portion that is provided on the other two opposite sides of the support frame and has screw holes for fixing the support frame to the heat sink. It is characterized by that.

  The video display device according to the present invention has any one of the above fan support and a fitting part that fits into the hole or the convex part, and dissipates heat generated in the video display part that displays the video. And a fan for air-cooling the heat sink, wherein the fan support is fixed to the heat sink and supports the fan.

  In the video display device according to the present invention, the heat sink has a plate shape substantially parallel to a vertical plane, and the fan support includes a plurality of the vibration isolation members so that the vibration isolation members are unevenly distributed downward. Further, the heat sink is fixed to the heat sink.

In the present invention, the first support member is fixed to the heat sink and supports the second support member on which the fan is placed. Since a vibration isolating member is interposed between the first support member and the second support member, it is possible to prevent vibration due to rotation of the fan from being transmitted from the second support member to the first support member. it can.
Moreover, since the 1st support member is equipped with the hole part or convex part for positioning the fixing location of a fan support with respect to a heat sink, it can fix a fan support to the predetermined location of a heat sink efficiently. it can.
In particular, the video display device has a heat sink for dissipating heat generated in the video display unit that has a fitting part that fits into the hole or the convex part, and displays a video, When the projection is configured to fit the heat sink, a fan is provided at a predetermined position of the video display device, and noise due to rotation of the fan can be prevented.

  In the present invention, since the second support member includes a clamping piece for clamping the fan, the fan can be easily placed at a predetermined position of the second support member.

  In the present invention, the second support member includes a vibration isolation member holding portion that holds the vibration isolation member. Therefore, after holding the vibration isolating member in the vibration isolating member holding part, the vibration isolating member is more efficiently interposed between the first support member and the second support member by joining the first support member and the second support member. Can be installed.

In the present invention, the first support member includes a rectangular support frame having a vent hole formed in the center. The two opposing sides of the support frame are provided with contact portions that contact the vibration isolation member, and the other two sides are provided with leg portions having screw holes for fixing the support frame to the heat sink. ing. Therefore, when the first support member is viewed from the center line direction of the vent hole, the contact portion and the leg portion are located at different locations.
Therefore, when the fan support is fixed to the heat sink with the screw, the contact portion does not interfere with the fixing.

  In the present invention, the fan is fixed to the plate-shaped heat sink substantially parallel to the vertical plane so that the vibration isolating member is unevenly distributed downward. A larger load is applied to the fan support in the lower part than in the upper part of the fan support, but the vibration isolation member is unevenly distributed downward, so that the vibration due to the rotation of the fan, the impact of dropping the image display device, etc. It can be absorbed effectively.

  ADVANTAGE OF THE INVENTION According to this invention, while preventing the noise by rotation of a fan, it can position with respect to a heat sink, and can fix a fan support to a heat sink efficiently.

  According to the present invention, the fan can be more efficiently placed at the predetermined position of the first support member.

  According to the present invention, the vibration isolation member can be more efficiently interposed between the first support member and the second support member in the assembly process of the first support member and the second support member.

  According to the present invention, when the fan support is fixed to the heat sink, the contact portion does not get in the way, and the fan support can be efficiently fixed to the heat sink.

  According to the present invention, as compared with the case where the fan support is fixed to the heat sink so that the vibration isolating member is unevenly distributed upward, the vibration due to the rotation of the fan or the impact of the fall of the video display device is absorbed more effectively. be able to.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
FIG. 1 is a perspective view schematically showing a configuration of a fan support A according to Embodiment 1 of the present invention, and FIG. 2 is an exploded perspective view of the fan support A.
In the figure, A is a bridge-type base 1 (first support member) fixed to a plate-shaped heat sink (not shown), and a base 2 on which the fan B (see FIG. 5) is placed while being supported by the base 1. The fan support is formed by interposing anti-vibration rubbers 3, 3 and 3 between them (second support member).

  FIG. 3 is a front view schematically showing the base 1. The base 1 has first to fourth sides 10a, 10b, 10c, and 10d that form a substantially square outer edge, and includes a plate-like support frame 10 in which a circular vent hole 10e is formed at the center. . The first side and the second side 10a, 10b are substantially parallel.

  The support frame 10 is formed with rectangular plate-shaped first to third legs 11, 12, 13 that are bent substantially perpendicularly to the support frame 10. The 1st leg part 11 is formed in the 1st edge | side 10a, and is biased to the 3rd edge | side 10c side which follows the 1st edge | side 10a. The second and third leg portions 12 and 13 are formed on both end sides of the second side 10b substantially parallel to the first side 10a.

  First to third fixed plate portions 11a, 12a, and 13a that are bent substantially perpendicularly outward from the first are formed at the tips of the first to third leg portions 11, 12, and 13, respectively. Screw holes 11b, 12b, and 13b for fixing the fan support A to the heat sink are formed at appropriate portions of the first to third fixed plate portions 11a, 12a, and 13a, respectively. The first and second fixed plate portions 11a and 12a are respectively formed with first and second holes 11c and 12c for positioning the fixing points of the fan support A with respect to a heat sink (not shown).

  Further, on the third side 10 c of the support frame 10, first and second contact pieces 14 and 15 that contact the anti-vibration rubbers 3 and 3 extend outward from the vent hole 10 e. In addition, a third contact piece 16 that contacts the anti-vibration rubber 3 also extends outward from the vent hole 10e on the fourth side 10d of the support frame 10. The first to third contact pieces 14, 15, 16 have a rectangular shape with curved corners, and pedestal fixing screw holes 14 a for fixing the pedestal 2 via the anti-vibration rubbers 3, 3, 3. 15a and 16a are formed, respectively.

  Furthermore, the support frame 10 has an insertion hole 17 through which the tip of a fan fixing screw C (see FIG. 5) for fixing the fan B to the base 2 is inserted at each apex portion.

  FIG. 4 is a front view schematically showing the base 2. The pedestal 2 has a substantially square shape whose outer edge follows the support frame 10, and includes a plate-like mounting frame 20 having a vent hole 20 a similar to that of the support frame 10 formed in the central portion.

First and second anti-vibration rubber holding portions 21 and 22 are formed on one side of the mounting frame 20 so as to face the first and second contact pieces 14 and 15. A third vibration isolating rubber holding portion 23 is formed on the other side substantially parallel to the one side so as to face the third contact piece 16.
The first to third anti-vibration rubber holding portions 21, 22, and 23 have a substantially U shape that sandwich the cylindrical anti-vibration rubbers 3, 3, and 3, and extend outward from the mounting frame 20. .

  Further, on each side of the mounting frame 20, a clamping piece 24 that clamps the outer frame of the fan B (see FIG. 5) from four directions avoids the first to third vibration-proof rubber holding portions 21, 22, and 23. It is formed substantially perpendicular to.

  Furthermore, a fan fixing screw hole 25 into which a fan fixing screw C (see FIG. 5) for fixing the fan B to the base 2 is screwed is formed at the four apex portions of the mounting frame 20.

  The anti-vibration rubbers 3, 3, 3 are substantially cylindrical, and the substantially central portion in the central axis direction of the outer peripheral surface has a reduced diameter covered by the first to third anti-vibration rubber holding portions 21, 22, 23. Holding parts 3a, 3a, 3a are formed. Further, the anti-vibration rubbers 3, 3 and 3 are formed with holes 3b, 3b and 3b through which the base fixing screws 4, 4 and 4 are inserted in the center. The anti-vibration rubbers 3, 3, 3 are held by the first to third anti-vibration rubber holding portions 21, 22, 23, and the first to third abutment pieces 14, 15, 16 of the base 1. The base 2 is fixed to the base 1 by screwing the base fixing screws 4, 4, 4 through which the anti-vibration rubbers 3, 3, 3 are inserted into the base fixing screw holes 14 a, 15 a, 16 a. Has been.

  FIG. 5 is a perspective view schematically showing the configuration of the fan support A that supports the fan B. FIG. The fan B is a square axial fan having a prismatic outer frame. A fan fixing screw C is inserted through the apex portion of the fan B, and the fan fixing screw C is screwed into the fan fixing screw hole 25 so that the fan B is fixed to the base 2. Further, the fan B is clamped by the clamping piece 24.

  In the fan support A configured as described above, noise due to rotation of the fan B can be prevented, positioning with respect to the heat sink can be performed, and the fan support A can be efficiently fixed to the heat sink. .

  Further, the fan B can be more efficiently placed at a predetermined position of the base 2 and fixed with screws.

  Furthermore, in the assembly process of the base 1 and the pedestal 2, the anti-vibration rubbers 3, 3, 3 can be interposed between the base 1 and the pedestal 2 more efficiently.

  Furthermore, when the fan support A is fixed to the heat sink, the first to third contact pieces 14, 15, 16 do not get in the way, and the fan support A can be efficiently fixed to the heat sink. it can.

  In the first embodiment, the fan support made of the base, the pedestal, and the anti-vibration rubber as shown in FIG. 2 has been described. However, the fan support is separated from the first support member and the second support member. Any other shape may be used as long as the anti-vibration rubber is interposed between the first support member and the second support member.

  Moreover, although the fan support tool provided with the 1st hole part and the 2nd hole part for positioning the fixing location with respect to a heat sink was demonstrated, you may comprise so that the convex part or recessed part for positioning may be provided.

  Further, although the first to third vibration-proof rubber holding portions and the holding pieces are provided, the first to third vibration-proof rubber holding portions and the holding pieces may be omitted.

(Embodiment 2)
FIG. 6 is a front perspective view schematically showing a video display apparatus according to Embodiment 2 of the present invention, and FIG. 7 is a rear perspective view schematically showing the video display apparatus.

  The video display device according to the second embodiment has a video display surface 5a that displays a TV video on the front side, a video display unit 5 that forms a front view rectangle, and a video display unit that exposes the video display surface 5a. And a cabinet 6 that accommodates 5. The cabinet 6 includes a front cabinet 61 and a rear cabinet 62, and is fixed with screws.

  The video display unit 5 includes a liquid crystal panel, an optical sheet disposed on the back side of the liquid crystal panel, a direct backlight unit, a circuit board, and the like.

  The direct type backlight unit includes a cold cathode fluorescent tube (not shown), a backlight chassis 7 (see FIG. 8) that supports the cold cathode fluorescent tube, and the like. The backlight chassis 7 also serves as a heat sink for radiating heat generated in the video display unit 5.

  FIG. 8 is a rear view schematically showing the video display device with the rear cabinet 62 removed, and FIG. 9 is a rear view schematically showing the fan support A and the fan B fixed to the backlight chassis 7 with screws. is there.

The video display device includes a fan B and a fan support A for radiating heat of the video display unit 5 through a heat sink. The configuration of the fan support A is the same as that of the fan support A according to the first embodiment.
The heat sink positions the fan support A so that the fan B faces the exhaust hole 62a of the rear cabinet 62, and the anti-vibration rubbers 3, 3, and 3 are unevenly distributed downward, that is, the third side of the base 1. Convex portions 7a and 7b are provided for determining the posture of the fan B so that 10c is located on the lower side and the fourth side 10d is located on the upper side.
The fan support A is positioned by fitting the projections 7a and 7b into the first and second holes 11c and 12c. Further, the screws D, D, and D are inserted into the screw holes 11b, 12b, and 13b and screwed into the backlight chassis 7, whereby the fan support A is fixed to the backlight chassis 7 with screws.

  In the image display device configured as described above, vibration or impact due to the rotation of the fan B is more effectively absorbed as compared with the case where the anti-vibration rubbers 3, 3, and 3 are fixed so as to be unevenly distributed upward. can do.

  In addition, since the backlight chassis 7 includes the convex portions 7a and 7b for positioning, the fan support A can be efficiently placed at a predetermined position of the base 2 and fixed with screws.

  Further, the fan support A includes first to third legs 11, 12, and 13 asymmetrically with respect to the center line of the vent hole 10e, and the backlight chassis 7 is connected to the first and second legs 12. Since the projections 7a and 7b fitted into the first and second holes 11c and 12c provided are provided, the posture of the fan support A can also be determined.

  Since the configuration, operation, and effect of the fan support according to Embodiment 2 are the same as the configuration, operation, and effect of the fan support according to Embodiment 1, the same reference numerals are given to corresponding portions. Detailed description thereof is omitted.

It is a perspective view which shows typically the structure of the fan support tool which concerns on Embodiment 1 of this invention. It is a disassembled perspective view of a fan support. It is a front view which shows a base typically. It is a front view which shows a base typically. It is a perspective view which shows typically the structure of the fan support tool which is supporting the fan. It is a perspective view of the front side which shows typically the video display apparatus concerning Embodiment 2 of this invention. It is a perspective view of the back side which shows an image display device typically. It is a rear view which shows typically the video display apparatus which removed the back cabinet. It is a rear view which shows typically the fan support and the fan which were fixed by screwing to the backlight chassis.

Explanation of symbols

A Fan support B Fan C Fan fixing screw 1 Base (first support member)
2 Pedestal (second support member)
3 Anti-vibration rubber (anti-vibration member)
4 Base fixing screw 5 Video display part 5a Video display surface 6 Cabinet 7 Backlight chassis 7a, 7b Convex part (fitting part)
DESCRIPTION OF SYMBOLS 10 Support frame 10e Ventilation hole 11 1st leg part 11c 1st hole part 12 2nd leg part 12c 2nd hole part 13 3rd leg part 11b, 12b, 13b Screw hole 14 1st contact piece (contact part)
15 Second contact piece (contact part)
16 3rd contact piece (contact part)
20 Mounting frame 21 First anti-vibration rubber holding portion (vibration-proof member holding portion)
22 Second anti-vibration rubber holder (anti-vibration member holder)
23 Third anti-vibration rubber holding part (anti-vibration member holding part)
24 Nipping pieces

Claims (7)

In the fan support that supports the fan so as to face the heat sink,
A first support member fixed to the heat sink;
A second support member that is supported by the first support member and on which the fan is placed;
An anti-vibration member interposed between the first support member and the second support member,
The first support member is
A fan support, comprising: a hole or a projection for positioning a fixed portion with respect to the heat sink. The second support member is
The fan support according to claim 1, further comprising a clamping piece for clamping the fan. The second support member is
The fan support according to claim 1, further comprising a vibration isolation member holding portion that holds the vibration isolation member. The second support member is
A ventilation hole is formed in the center, and a rectangular placement frame on which the fan is placed;
A holding piece provided on the mounting frame for holding the fan;
The fan support according to claim 1, further comprising: a vibration isolating member holding portion that extends from the mounting frame to the outside of the ventilation hole and holds the vibration isolating member. The first support member is
A vent hole is formed in the center, and a support frame for supporting the second support member;
Provided on two opposing sides of the support frame, and a contact portion that contacts the vibration isolation member;
A leg portion provided on the other two opposite sides of the support frame and having screw holes for fixing the support frame to a heat sink. The fan support according to one. The fan support according to any one of claims 1 to 5,
A heat sink for dissipating heat generated in the video display unit that has a fitting part that fits into the hole or the convex part, and displays an image,
A fan for air-cooling the heat sink,
The fan support is
An image display device fixed to the heat sink and supporting the fan. The heat sink is
It is plate-shaped substantially parallel to the vertical plane,
The fan support is
A plurality of the vibration isolating members,
The video display device according to claim 6, wherein the vibration isolating member is fixed to the heat sink so as to be unevenly distributed downward.

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