CN1306330C - Lamp clamping device - Google Patents

Abstract

A lamp tube clamping device is used in a backlight assembly. The lamp tube clamping device comprises a supporting portion, a fixing portion and a U-shaped clamping portion. The supporting portion is used to separate a diffuser plate of the backlight assembly from the lamp tube by a fixed distance, and the supporting portion comprises a U-shaped hole for clamping another lamp tube, and the opening width of the U-shaped hole is equal to the diameter of the lamp tube. The fixing portion is used to be fixed on the back plate of the backlight assembly. The U-shaped clamping portion is used to clamp the lamp tube, and the opening width of the U-shaped clamping portion is equal to the diameter of the lamp tube.

Description

Lamp clamping device

technical field

The present invention relates to a lamp tube clamping device, and in particular to a lamp tube clamping device using a U-shaped clamping part to clamp the lamp tube.

Background technique

In response to the demand for large LCD screens, the size of the direct-lit backlight assembly is getting larger and larger, making the internal light tubes longer and longer. When the backlight assembly is placed vertically, the light tube is easily deformed downward due to gravity, thus causing severe light and dark phenomena on the display screen. In order to avoid the downward deformation of the lamp tube, generally a lamp tube clamping device is used to clamp the part near the middle of the lamp tube.

Please refer to FIG. 1 , which is a partial cross-sectional structural view of a conventional direct-lit backlight assembly. The backlight assembly 100 includes a back plate 110 , a diffuser plate 120 , a light tube 130 and a light tube clamping device 140 . The back plate 110 is used for arranging the lamp tube 130 , and the diffuser plate 120 is used for evenly diffusing the light source emitted by the lamp tube 130 . The lamp clamping device 140 includes a supporting part 142 , a fixing part 144 and a C-shaped clamping part 146 . The supporting portion 142 is used to separate the diffuser plate 120 from the lamp tube 130 by a fixed distance. The fixing portion 144 is used for fixing on the backboard 110 . The C-shaped clamping portion 146 is used to clamp the lamp tube 130 to prevent the lamp tube 130 from being deformed downward when placed vertically in use.

However, when the lamp tube 130 is clamped by the lamp tube clamping device 140 , the lamp tube 130 must be pressed into the C-shaped clamping portion 146 . Since the width of the C-shaped opening of the C-shaped clamping portion is smaller than the diameter of the lamp tube 130 , the lamp tube 130 is easily crushed and broken. Moreover, one lamp tube clamping device can only clamp one lamp tube, so that a single backlight assembly needs many clamping devices, and thus the manufacturing process is relatively complicated.

Contents of the invention

In view of this, the object of the present invention is to provide a lamp tube clamping device that can avoid lamp tube rupture.

The lamp tube clamping device according to the present invention is used in a backlight assembly. The backlight assembly includes a backplane, a diffusion plate and several lamp tubes. The lamp tube clamping device includes a supporting part, a fixing part and a U-shaped clamping part. The support part is used to separate the diffuser plate from the lamp tube by a fixed distance, and the support part includes a U-shaped hole for clamping another lamp tube. The opening width of the U-shaped hole is equal to the diameter of the lamp tube. The fixing part is used for fixing on the backboard. The U-shaped clamping part is used for clamping the lamp tube, and the opening width of the U-shaped clamping part is equal to the diameter of the lamp tube.

The advantage of the lamp tube clamping device of the present invention is that the opening of the clamping part is equivalent to the diameter of the lamp tube, so that when the lamp tube is inserted into the clamping part, the clamping part can just hold the lamp tube, which can avoid placing the backlight assembly vertically. It deforms due to gravity when placed. In addition, the lamp tube clamping device of the present invention can clamp multiple lamp tubes at the same time, which can simplify the manufacturing process of the backlight assembly.

In order to make the above objects, features and advantages of the present invention more comprehensible, a preferred embodiment will be described below in detail with accompanying drawings.

Description of drawings

FIG. 1 is a cross-sectional structure diagram of a conventional direct-lit backlight assembly;

2A is a cross-sectional structure diagram of a backlight assembly according to the first embodiment of the present invention;

2B is a cross-sectional structure diagram of another backlight assembly according to the first embodiment of the present invention;

Fig. 2C is a cross-sectional structure diagram of a clamping part with elastic bumps;

3A is a cross-sectional structure diagram of a backlight assembly according to a second embodiment of the present invention;

3B is a three-dimensional structure diagram of the backplane assembly according to the second embodiment of the present invention;

4A is a cross-sectional structure diagram of a backlight assembly according to a third embodiment of the present invention; and

FIG. 4B is a cross-sectional view of the U-shaped clamping portion with bumps in FIG. 4A .

Detailed ways

The lamp tube clamping device disclosed in the preferred embodiment of the present invention uses a U-shaped clamping part to replace the existing C-shaped clamping part to clamp the lamp tube to avoid breaking the lamp tube. Next, according to the relative directions of the U-shaped clamping portion and the backplane of the backlight assembly, three embodiments will be described respectively.

Embodiment one:

Please refer to FIG. 2A , which is a cross-sectional structure diagram of the backlight assembly according to the first embodiment of the present invention. The direct type backlight assembly 200 includes a backplane 202 , a diffusion plate 204 and a lamp clamping device 210 . The lamp clamping device 210 includes a supporting part 212 , a fixing part 214 and several U-shaped and hook-shaped clamping parts. Here, four U-shaped clamping portions 216 and two hook-shaped clamping portions 218 are taken as an example. These U-shaped clamping portions 216 are connected to each other by the fixed portions 214 to form a serial connection, and the hook-shaped clamping portions 218 are respectively connected to the two U-shaped clamping portions 216 of the serial connection configuration. end. Because the clamping parts located at the two ends of the lamp tube clamping device 210 do not have to be U-shaped but still achieve the clamping effect, the hook-shaped clamping part 218 is sufficient. And this supporting part 212 is arranged on the fixing part 214, in this example is the fixing part 214 that is arranged in the U-shaped clamping part 216 middle section of the series connection pattern, and the size of the fixing part 214 is also matched with the supporting part 212 as appropriate. In an extended manner, there is enough space for disposing the support portion 212 .

The support portion 212 is used to separate the diffuser plate 204 from the lamp tube 206 by a sufficient distance. The fixing portion 214 is used for fixing the clamping device 210 on the backboard 202 . The U-shaped clamping portion 216 and the hook-shaped clamping portion 218 are used to clamp the lamp tube 206 . When the lamp tube clamping device 210 clamps the lamp tube 206, the openings of the U-shaped clamping portion 216 and the hook-shaped clamping portion 218 are facing the back plate 202, and the openings of the U-shaped clamping portion 216 and the hook-shaped clamping portion 218 are The opening width W1 is equal to the diameter D of the lamp tube 206 . The lamp tube 206 is held by the U-shaped clamping portion 216 and the hook-shaped clamping portion 218 so that when the backlight assembly is placed vertically, the deformation of the lamp tube 206 due to gravity can be avoided. Moreover, in this embodiment, one lamp clamping device can hold a plurality of lamp tubes, thus simplifying the manufacturing process of the backlight assembly.

FIG. 2B and FIG. 2C are schematic deformation views of the lamp clamping device of the first embodiment. In FIG. 2B , the support portion 222 of the lamp clamping device 220 of the backlight assembly 250 includes a U-shaped hole 224 for clamping another lamp 206 . The opening width W2 of the U-shaped hole 224 is equal to the diameter D of the lamp tube 206 . In FIG. 2C , both inner sidewalls of the clamping portion 206 may each include an elastic protrusion 219 for clamping the lamp tube 206 when the lamp tube 206 is inserted into the clamping portion 216 .

Embodiment two:

Please refer to FIG. 3A , which is a cross-sectional structure diagram of a backlight assembly according to a second embodiment of the present invention. The direct type backlight assembly 300 includes a backplane 302 , a diffusion plate 304 and a lamp clamping device 310 . The lamp clamping device 310 includes a supporting part 312 , a fixing part 314 and a U-shaped clamping part 316 . When the lamp tube clamping device 310 clamps the lamp tube 306 , the opening of the U-shaped clamping portion 316 faces the direction parallel to the back plate 302 , and the opening width W3 of the U-shaped clamping portion 316 is equal to the diameter D of the lamp tube 306 . The U-shaped clamping portion 316 and the supporting portion 312 are connected to the fixing portion 314 . The lamp tube 306 is held by the U-shaped clamping portion 316 to avoid deformation of the lamp tube 306 caused by pressure when placed vertically.

FIG. 3B is a perspective view of the backlight assembly of the second embodiment. The backlight assembly 300 includes two lamp clamping devices 310 . The opening directions of the U-shaped clamping parts of the two lamp tube clamping devices 310 are opposite, so the lamp tubes 306 can be fastened in a staggered manner. In this way, when the backlight assembly is assembled for a shaking test, the lamp tube 306 can be restricted in any direction without moving.

Embodiment three:

Please refer to FIG. 4A , which is a cross-sectional structure diagram of a backlight assembly according to a third embodiment of the present invention. The direct type backlight assembly 400 includes a back plate 402 a diffuser plate 404 and a lamp clamping device 410 . The lamp clamping device 410 includes a supporting part 412 , a fixing part 414 and a U-shaped clamping part 416 . When the lamp tube clamping device 410 clamps the lamp tube 406 , the opening of the U-shaped clamping portion 416 faces away from the back plate 402 , and the opening width W4 of the U-shaped clamping portion 416 is equal to the diameter D of the lamp tube 406 . The U-shaped clamping portion 416 and the supporting portion 412 are connected to the fixing portion 414 . The lamp tube 406 is held by the U-shaped clamping portion 416 to prevent the lamp tube 406 from being deformed due to gravity when placed vertically.

As shown in FIG. 4B , the two inner walls of the U-shaped clamping portion 426 may each include an elastic protrusion 419 for clamping the lamp tube 406 when the lamp tube 406 is inserted into the U-shaped clamping portion 416 .

In the above three embodiments, the lamp tube clamping device is made of a transparent material so that the light emitted by the lamp tube can not be hindered, or can be made of white material so as not to affect the color of the light source. Moreover, the fixing portion 414 can be locked on the backboard by screws, or locked on the backboard by hooks.

According to the above-mentioned preferred embodiment, the advantage of the lamp tube clamping device of the present invention is that the opening of the clamping part is equivalent to the diameter of the lamp tube, so that when the lamp tube is inserted into the clamping part, the clamping part can just hold the lamp tube , which can avoid deformation due to gravity when the backlight assembly is placed vertically. Moreover, the inner walls on both sides of the clamping part may have elastic protrusions, so that the clamping part can clamp the lamp tube more effectively. In addition, the lamp tube clamping device of the present invention can clamp multiple lamp tubes at the same time, which can simplify the manufacturing process of the backlight assembly.

In summary, although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person familiar with the art may make various, etc. without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall prevail as defined by the scope of the appended claims.

Claims (10)

1. a holding device of strip lamp is used for a backlight assembly, and this backlight assembly comprises a backboard, a diffuser plate and several fluorescent tubes, and this holding device of strip lamp comprises:

One support portion, in order to this diffuser plate and this fluorescent tube are separated a fixed range, and this support portion comprises a U type hole, in order to another fluorescent tube of clamping, the A/F in this U type hole equals the diameter of this fluorescent tube;

One fixed part is in order to be fixed in this support portion the inner face of this backboard with respect to this diffuser plate; And

Several U type clamping parts are coupled to this fixed part, and in order to this fluorescent tube of difference clamping, wherein the A/F of this U type clamping part equals the respectively diameter of this fluorescent tube.

2. holding device of strip lamp as claimed in claim 1 is characterized in that the opening of this U type clamping part is this inner face towards this backboard when this this fluorescent tube of holding device of strip lamp clamping.

3. holding device of strip lamp as claimed in claim 2 is characterized in that this U type clamping part is to interconnect with fixed part, to form the aspect of serial connection.

4. holding device of strip lamp as claimed in claim 3 is characterized in that also comprising a hook clamping part, is arranged in an end of this serial connection aspect U type clamping part.

5. holding device of strip lamp as claimed in claim 1, the opening that it is characterized in that this U type clamping part are the directions towards parallel this backboard.

6. holding device of strip lamp as claimed in claim 5 is characterized in that this holding device of strip lamp also comprises several the 2nd U type clamping parts, and in order to this fluorescent tube of while clamping, and the opening direction of the 2nd U type clamping part is opposite with the opening direction of this U type clamping part.

7. holding device of strip lamp as claimed in claim 1 is characterized in that when this this fluorescent tube of holding device of strip lamp clamping, and the opening of this U type clamping part is this inner face of this backboard dorsad.

8. holding device of strip lamp as claimed in claim 7 is characterized in that this U type clamping part and this support portion are connected in respectively on this fixed part.

9. holding device of strip lamp as claimed in claim 1 is characterized in that respectively two madial walls of this U type clamping part respectively comprise an elasticity salient point, in order to block this corresponding fluorescent tube.

10. holding device of strip lamp as claimed in claim 1 is characterized in that this holding device of strip lamp is to be made by transparent material or white material.

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