CN201210210Y - Frame of backlight module - Google Patents

Abstract

The utility model discloses a backlight unit's frame, it includes the metal back of the body frame and glues the frame, and the metal back of the body frame has a bottom plate, the periphery of bottom plate makes progress and extends perpendicularly has a plurality of curb plates, and at least one curb plate is formed with the card solid structure that extends to a curb plate edge, glues the frame and has the shaping at the inboard frame wall of curb plate of the metal back of the body frame and the card solid portion of shaping on corresponding frame wall, this card solid portion with the card solid structure gomphosis is in the same place. The utility model discloses backlight unit's frame can follow the corresponding edge injection plastic of curb plate when injection moulding glues the frame to the plastic flows smoothly, can shorten the dwell time of injection plastic, and then does benefit to and improves efficiency and the quality of gluing the frame shaping on metal back of the body frame.

Description

The frame of the backlight module

technical field

The utility model relates to a backlight module, in particular to a frame of the backlight module.

Background technique

Liquid crystal display devices have the advantages of lightness, thinness, and low power consumption, and thus are widely used in electronic products such as computers, mobile phones, and PDAs. The liquid crystal display device has a backlight module. The backlight module includes a frame and optical elements assembled on the frame. The frame is generally composed of a metal back frame and a plastic frame. In order to reduce the thickness of the backlight module and increase its structural strength, a frame in which a plastic frame and a metal back frame are combined by an in-mold injection molding (Insert Molding) method appears in the prior art.

Referring to FIG. 1, a frame of a conventional backlight module includes a metal back frame 10' and a plastic frame 20'. The metal back frame 10' has a bottom plate 11' and side plates 12' vertically connected to the bottom plate 11', wherein the two opposite side plates 12' are respectively provided with holes 13'. The plastic frame 20' is formed on the metal back frame 10' by in-mold injection molding, and the molten plastic is injected into the hole 13' during molding, so that the metal back frame 10' and the plastic frame 20' are integrated , and firmly combine the metal back frame 10' with the plastic frame 20'.

However, when the plastic frame 20' of the backlight module is injection-molded, the flow direction of the plastic needs to change abruptly when the molten plastic is injected into the perforation 13', so that it takes a long time to keep the pressure for the plastic to be completely injected. It is easy to lead to low production efficiency and poor quality.

Utility model content

The purpose of the utility model is to provide a frame of a backlight module which is beneficial to improve the efficiency and quality of the molding of the plastic frame on the metal back frame against the defects and deficiencies of the prior art.

In order to achieve the above object, the frame of the backlight module provided by the utility model includes a metal back frame and a plastic frame, the metal back frame has a bottom plate, and a plurality of side plates extend vertically upward from the periphery of the bottom plate, at least one side plate forms There is a clamping structure extending to an edge of the side plate. The plastic frame has a frame wall formed on the inner side of the side plate of the metal back frame and a clamping part formed on the corresponding frame wall. The clamping part is embedded with the clamping structure. combine together.

As mentioned above, the frame of the backlight module of the present invention is formed by the side plate of the metal back frame and extends to an edge of the side plate to replace the hole in the background technology. The corresponding edge of the board is injected with plastic, so that the plastic flows smoothly, which can shorten the holding time of the injected plastic, and thus help to improve the efficiency and quality of the plastic frame formed on the metal back frame.

Description of drawings

FIG. 1 is a perspective view of a frame of a backlight module in the prior art.

FIG. 2 is an exploded perspective view of the first embodiment of the frame of the backlight module of the present invention.

FIG. 3 is a perspective view of the frame of the backlight module shown in FIG. 2 .

FIG. 4 is a cross-sectional view of the frame of the backlight module shown in FIG. 3 along line IV-IV.

Fig. 5 is the three-dimensional exploded view of the second embodiment of the frame of the backlight module of the present invention

The reference signs of each component in the figure are explained as follows:

Frame of backlight module 1 metal back frame 10, 10’

Bottom plate 11, 11’ side plate 12, 12’

groove 13 bulge 14

Plastic frame 20, 20’ Frame wall 21

Convex part 22 Depressed groove 23

Hole hole 13’

Detailed ways

In order to describe the technical content, structural features, achieved goals and effects of the present utility model in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

Please refer to FIG. 2 and FIG. 3 , which are the first embodiment of the frame 1 of the backlight module of the present invention, including a metal back frame 10 and a plastic frame 20 . The metal back frame 10 has a bottom plate 11 in the shape of a rectangular plate. Side plates 12 extend vertically upwards from the four peripheral edges of the bottom plate 11 respectively. The four side plates 12 are not connected to each other, so that the adjacent two side plates 12 are separated by a certain distance, wherein two opposite side plates 12 are respectively provided with a fastening structure. A groove 13 is formed on the inner side and extends laterally to both side edges of the side plate 12 . Please refer to Fig. 3 and Fig. 4, the plastic frame 20 is injection molded on the metal back frame 10, and it has a frame wall 21 formed on the inner side of the side plate 12 connected end to end and a frame wall 21 formed on the corresponding frame wall 21 to be fastened. The clamping part corresponding to the structure. The fastening portion is a convex portion 22 formed in the groove 13 and fitted with the groove 13 . The accommodation space enclosed by the plastic frame 20 and the metal back frame 10 is used for accommodating optical components (not shown in the figure). The groove 13 is formed by a smooth arc-shaped bend in the middle of the side plate 12 and extends laterally to the edges of both sides of the side plate 12, so that the injection of plastic from the top and both sides of the side plate 12 will flow more smoothly, thus shortening The holding time of the injection plastic is beneficial to improve the efficiency and quality of molding the plastic frame 20 on the metal back frame 10 .

Please refer to FIG. 5 , which is a second embodiment of the frame 1 of the backlight module of the present invention. In this embodiment, the structure of the frame 1 of the backlight module is basically the same as that of the frame 1 of the backlight module in the first embodiment. The middle part of the plate 12 is smoothly arc-shaped and formed on the inner side of the side plate 12 to extend laterally to an inwardly protruding raised portion 14 on both sides of the side plate 12, and the fastening portion is a formed raised portion 14 The surface is fitted with the recessed groove 23 of the protrusion 14 . The raised portion 14 is formed by bending the middle part of the side plate 12 in a smooth arc shape and extends laterally to the edges on both sides of the side plate 12, so that the injection of plastic from the top and both sides of the side plate 12 will make the plastic flow more smoothly. Shortening the pressure-holding time of the injected plastic is beneficial to improving the efficiency and quality of molding the plastic frame 20 on the metal back frame 10 .

The fastening structure of the metal back frame 10 of the frame 1 of the backlight module of the present invention can also be a convex-concave pattern formed on the inner side of the side plate 12 by repeated bending of the side plate 12 and extending laterally to the edges on both sides of the side plate 12. The plastic frame 20 is injection-molded on the metal back frame 10 , and a fastening portion corresponding to the fastening structure on the side plate 12 is formed on the frame wall 21 .

The fastening structure of the present invention can also be a raised structure or a recessed structure formed by stamping and extending only to one edge of the side plate 12 .

To sum up, the frame 1 of the backlight module of the present invention is formed by the side plate 12 of the metal back frame 10 and extends to an edge of the side plate 12. The clamping structure replaces the hole 13' in the background technology. When the plastic frame 20 is used, plastic can be injected from the corresponding edge of the side plate 12, so that the plastic flows smoothly, and the holding time of the injected plastic can be shortened, so the efficiency and quality of molding the plastic frame 20 on the metal back frame 10 can be improved.

Claims (4)

1. the framework of a module backlight, comprise metal back frame and glue frame, metal back frame has a base plate, the periphery of described base plate upwards vertically is extended with a plurality of side plates, it is characterized in that: at least one side plate is formed with the clamping structure that extends to side plate one edge, the glue frame has the frame wall of the side plate inboard that is molded over metal back frame and is molded over holding division on the respective block wall, and this holding division and described clamping structure are entrenched togather.

2. the framework of module backlight as claimed in claim 1 is characterized in that: described clamping structure is described side plate bending and the groove that forms in the inboard of side plate, and described holding division is one to be molded over the protuberance in the groove.

3. the framework of module backlight as claimed in claim 1 is characterized in that: described clamping structure is described side plate bending and the inwardly protruded lug boss that forms in the inboard of side plate, and described holding division is one to be molded over lug boss depression in the surface groove.

4. the framework of module backlight as claimed in claim 1 is characterized in that: described clamping structure is that described side plate bends and the alternate structure of convex-concave that forms in the inboard of side plate repeatedly.

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