CN203607042U - LED display module and module bottom shell thereof - Google Patents

Abstract

The utility model relates to an LED display module and its module bottom shell. The module bottom shell includes a plastic shell and a metal shell. The plastic shell is integrated with the metal shell through injection molding. The plastic shell A penetrating accommodating area is formed along its thickness direction, and the metal shell is embedded in the accommodating area. The LED display module includes a mask, a waterproof cover, a PCB and the above-mentioned module bottom case, and the heating electronic devices on the PCB are located in the area corresponding to the metal shell of the module bottom case. The above-mentioned module bottom shell has the advantages of light weight, moderate strength and rigidity, good waterproof and heat dissipation performance, low component cost and short production cycle.

Description

LED display module and its module bottom case

technical field

The utility model relates to the technical field of LED display, in particular to an LED display module and a module bottom case thereof.

Background technique

In recent years, the LED display box has developed from the traditional sheet metal box and module combination structure to the integration of module and box. The modular bottom shell replaces the original sheet metal box member, and forms an independent structural unit with the mask. This structural unit has the characteristics of a box: it can be connected to each other to form a screen, it can have drive, control and power supply inside, and these electronic devices can also be placed outside. This structural unit is light in weight, compact in structure and high in dimensional and flatness precision.

At present, the material of the module bottom shell of this structural unit is generally all metal or all plastic. The former is heavy, and the production cost is high, and the metal material must first be die-cast to form a blank, and then be machined, so the production cycle is long. The latter is weak in strength and poor in rigidity. And the key is that the heat dissipation of the LED display box is very high, and the heat dissipation requirements are very high. Poor heat dissipation will have a great impact on the display quality, and in severe cases, the screen body will not work. , the heat dissipation performance is difficult to meet the requirements.

Contents of the invention

The technical problem to be solved by the utility model is to provide a module bottom shell of an LED display module, which has certain strength and rigidity, and has low cost, short production cycle, and good waterproof and heat dissipation performance .

The utility model is achieved by providing a LED display module bottom shell, including a plastic shell and a metal shell, the plastic shell is integrated with the metal shell through injection molding, and the A penetrating accommodating area is formed on the plastic shell along its thickness direction, and the metal shell is embedded in the accommodating area.

Further, the plastic shell covers the periphery of the metal shell.

Further, the thickness of the peripheral edge of the metal shell is relatively thin, and its peripheral position is concave on the outer wall surface to form a stepped surface. The outer wall surface of the periphery of the housing is flush.

Further, a slot for absorbing shrinkage difference is provided on the plastic shell near the periphery of the metal shell.

Further, the slot is formed by a depression on the inner wall of the plastic housing, and its cross-section is "U", "W" or wavy.

Further, a through hole is opened on the metal shell, and a positioning post extends from a position corresponding to the through hole on the plastic shell, and the positioning post is inserted into the through hole.

Further, the plastic casing covers the periphery of the metal casing, and the through hole is located at a rubberized part of the periphery of the metal casing.

Further, the metal shell includes a base and a plurality of cooling fins, and the cooling fins extend from the base to the outside of the module bottom case.

Another technical problem to be solved by the utility model is to correspondingly provide an LED display module having the above-mentioned module bottom case.

The utility model also provides an LED display module, which includes a mask, a waterproof cover, a PCB and a module bottom case. The mask and the module bottom case are assembled together to form an accommodating space. placed in the space on which several electronic devices are arranged, the waterproof cover is arranged on the outer surface of the PCB, the module bottom shell includes a plastic shell and a metal shell, and the plastic shell is formed by injection molding. The method is integrated with the metal shell, the plastic shell forms a penetrating accommodation area along its thickness direction, the metal shell is embedded in the accommodation area, and the heat-generating electronics on the PCB The device is located in the area corresponding to the metal shell of the module bottom case.

Further, the heat-generating electronic device is arranged in close contact with the metal casing.

Compared with the prior art, the above-mentioned module bottom shell integrates the plastic shell and the metal shell through injection molding. At the same time of heat dissipation, the strength and rigidity of plastic parts can also be enhanced. Such a module bottom shell has the advantages of light weight, moderate strength and rigidity, waterproof, good heat dissipation performance, low cost of parts, and short production cycle.

Description of drawings

FIG. 1 is a perspective view of a preferred embodiment of the LED display module in the present invention.

FIG. 2 is a schematic partial cross-sectional view of the embodiment shown in FIG. 1 .

FIG. 3 is a schematic plan view of the inner wall of the module bottom case in FIG. 1 .

FIG. 4 is a schematic cross-sectional view of section A-A in FIG. 3 .

Fig. 5 is a partially enlarged view of part I in Fig. 4 .

Fig. 6 is a partially enlarged view of part II in Fig. 4 .

FIG. 7 is a schematic plan view of the inner wall of the metal shell in FIG. 3 .

FIG. 8 is a schematic cross-sectional view of the B-B section in FIG. 7 .

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

An LED display module provided in this specific embodiment is shown in FIG. 1 and FIG. 2 , and includes: a mask 1 , a waterproof cover 2 , a PCB 3 and a module bottom case 4 . The face mask 1 and the module bottom case 4 are assembled together to form an accommodating space 100 , the PCB3 is located in the accommodating space 100 , a number of electronic devices are arranged on the PCB3, and the waterproof cover 2 is set on the outer surface of the PCB3.

Please refer to FIGS. 3 to 8 together. The module bottom case 4 includes a plastic case 41 and a metal case 42 . The plastic shell 41 is integrated with the metal shell 42 through injection molding. In this embodiment, the module bottom case 4 has two metal shells 42, the two metal shells 42 are arranged at intervals, and two penetrating accommodating areas (not marked in the figure) are formed on the plastic shell 41 along its thickness direction. ), the metal shell 42 is embedded in the accommodating area of the plastic shell 41 . The heat-generating electronic devices 31 (such as driver ICs) on the PCB3 are located in the area corresponding to the metal shell 42, and are placed close to the metal shell 42, so that the heat generated by the heat-generating electronic devices 31 can be directly dissipated through the metal shell 42 to the external environment.

The above-mentioned module bottom shell 4 combines the plastic shell 41 and the metal shell 42 by injection molding. During processing, the metal shell 42 is pre-placed in the plastic mold, and the plastic and metal shells are realized in the mold by injection molding. Combination of metal parts. The structure of the component in the plastic part is complex, which can be realized by injection molding, and the metal shell 42 can also strengthen the strength and rigidity of the plastic part while playing the role of heat dissipation. Such a module bottom case 4 has light weight, strength, It has the advantages of moderate rigidity, good waterproof and heat dissipation performance, low cost of parts and short production cycle.

Specifically, the metal shell 42 can be made of a metal material with good thermal conductivity (such as aluminum or aluminum alloy, etc.), and its quantity and arrangement in the plastic shell 41 can be determined according to the heat-generating electronic components on the PCB3 in the LED display. 31 specific location to choose. The metal shell 42 includes a base 421 and a plurality of cooling fins 422 . The cooling fins 422 extend from the base 421 to the outside of the module bottom case 4 and are arranged in parallel in a horizontal direction. Of course, the arrangement of the cooling fins 422 is not limited to the above, as long as it can increase the heat dissipation area and quickly dissipate heat to the outside. For example, the cooling fins 422 can also be arranged vertically and in parallel.

The plastic shell 41 covers the periphery of the metal shell 42 , forming a "three-sided rubber" structure on the periphery of the metal shell 42 , so as to achieve a stable combination of the plastic shell 41 and the metal shell 42 . In order to make the combination of the plastic shell 41 and the metal shell 42 more stable, in this embodiment, the metal shell 42 is provided with a number of through holes 423 on the peripheral rubberized part, and the position of the plastic shell 41 corresponding to the through holes 423 A positioning column 413 is extended, and the positioning column 413 is passed through the through hole 423 . The positioning post 413 is formed by plastic flowing into the through hole 423 during the injection molding process, which can increase the bonding strength between the plastic shell 41 and the metal shell 42 .

In this embodiment, the inner wall surface of the plastic shell 41 covering the periphery of the metal shell 42 protrudes from the inner wall surface of the periphery of the metal shell 42; A stepped surface 424 is formed, the through hole 423 is located on the stepped surface 424 , the plastic shell 41 covers the stepped surface 424 , and the outer wall surface of the rubberized part of the plastic shell 41 is flush with the peripheral outer wall surface. As another embodiment, the combination of the plastic shell 41 and the inner wall surface of the metal shell 42 can also be similar to the above-mentioned outer wall surface, that is, the metal shell 42 is located on the inner wall surface to form a concave step surface, and the plastic shell 42 The body 41 covers the step surface, and the inner wall surface of the rubberized part of the plastic shell 41 is flush with the inner wall surface of the peripheral edge.

Since plastic and metal are two different materials, the shrinkage of the material will cause internal stress during the injection molding process, especially when the size of the bottom shell increases, the difference in shrinkage between the two materials will increase. In this embodiment, a slot 414 is provided on the plastic shell 41 near the periphery of the metal shell 42 for absorbing the shrinkage difference. The slot 414 is formed by a depression on the inner wall of the plastic shell 41 , and its cross-section is "U"-shaped. Of course, the cross-section of the slot 414 can also be "W"-shaped or wavy.

The module bottom case of the above-mentioned LED display module is easy to manufacture, and not only has good waterproof and heat dissipation performance, but also has certain strength and rigidity, and is especially suitable for LED display screens used in outdoor environments.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. the module drain pan of a LED demonstration module, it is characterized in that, comprise plastic casing and at least one heat dissipation metal housing, described plastic casing is combined as a whole by mode and the described heat dissipation metal housing of injection mo(u)lding, on described plastic casing, form along its thickness direction the disposal area of running through, described heat dissipation metal housing is embedded in the disposal area of described plastic casing.

2. LED as claimed in claim 1 shows the module drain pan of module, it is characterized in that, described plastic casing envelopes described metal shell periphery.

3. LED as claimed in claim 2 shows the module drain pan of module, it is characterized in that, the periphery thinner thickness of described metal shell, its peripheral position is in the recessed formation step surface of outside wall surface, described plastic casing envelopes described step surface, and the outside wall surface at its encapsulate position is concordant with the outside wall surface of described metal shell periphery.

4. LED shows the module drain pan of module as claimed in claim 2 or claim 3, it is characterized in that, on described plastic casing, is provided with the groove position of shrinking residual quantity for absorbing near the position of described metal shell periphery.

5. LED as claimed in claim 4 shows the module drain pan of module, it is characterized in that, described groove position is recessed to form by the internal face of described plastic casing, and its cross section is " U " shape, " W " shape or waveform.

6. the LED as described in any one in claims 1 to 3 shows the module drain pan of module, it is characterized in that, on described metal shell, offer through hole, on described plastic casing, reference column is extended in the position of corresponding described through hole, and described reference column is placed through in described through hole.

7. LED as claimed in claim 6 shows the module drain pan of module, it is characterized in that, described plastic casing envelopes the periphery of described metal shell, and described through hole is positioned at the encapsulate position of described metal shell periphery.

8. the LED as described in any one in claims 1 to 3 shows the module drain pan of module, it is characterized in that, described metal shell comprises base and some heat radiator, and described heat radiator is extended to the outside of described module drain pan by described base.

9. a LED shows module, comprise face shield, bucker, PCB and module drain pan, described face shield and module drain pan fit together common formation one accommodation space, described PCB is positioned at described accommodation space, which is provided with some electron devices, described bucker covers at the outside surface of described PCB, it is characterized in that, described module drain pan comprises plastic casing and metal shell, described plastic casing is combined as a whole by mode and the described metal shell of injection mo(u)lding, on described plastic casing, form along its thickness direction the disposal area of running through, described metal shell is embedded in described disposal area, heating electron device on described PCB is positioned at the corresponding region of metal shell of described module drain pan.

10. LED as claimed in claim 9 shows module, it is characterized in that, described heating electron device is close to described metal shell setting.

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