CN218413897U

CN218413897U - Assembly structure of vehicle-mounted on-screen system

Info

Publication number: CN218413897U
Application number: CN202221732041.6U
Authority: CN
Inventors: 黄火兴
Original assignee: Jingdian Automotive Electronics Huizhou Co ltd
Current assignee: Jingdian Automotive Electronics Huizhou Co ltd
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2023-01-31
Anticipated expiration: 2032-07-07

Abstract

The utility model relates to a subassembly structure of on-vehicle screen system, including display screen subassembly, PCBA, draw-in groove frame, metal framework and shell, PCBA has integrateed the circuit module that the on-vehicle screen system function needs, and heat conduction pad and PCBA set up in the fretwork department of draw-in groove frame, and the FPC winding displacement distributes between the U-shaped groove, makes the inner structure compacter, has solved the thicker problem of on-vehicle screen size; the use of the connector is reduced by adopting the binding process of black glue sealing, the communication stability of the signal wire is ensured, the PCBA is protected from interference by covering the metal cover on the PCBA, and the problem of unstable screen display is solved; the circuit board and the backlight module are arranged at intervals, and the heat dissipation design of the heat conduction pad, the heat dissipation fins and the heat dissipation holes is adopted, so that the heat dissipation effect of the vehicle-mounted screen is better, and the problem of high temperature when the screen is high in brightness is solved.

Description

Assembly structure of vehicle-mounted on-screen system

Technical Field

The utility model relates to an electronic equipment's component structure, concretely relates to subassembly structure of on-vehicle screen upper system.

Background

The old automobile or the low-matched automobile model does not have a central control display screen and does not have the functions of backing images or driving records, part of automobile owners can purchase the central control display screen or the streaming media rearview mirror by themselves in order to add the functions to the automobile, and although the vehicle-mounted central control display screen or the streaming media rearview mirror can be additionally installed, most of the vehicle-mounted screens have more internal components, thicker sizes, unstable screen display, large screen surface temperature and inconvenient installation.

Disclosure of Invention

The utility model discloses an it is not enough to prior art, design the subassembly structure of the on-vehicle screen upper system that the structure is ingenious, whole thickness is thinner. The original display driving board of the screen module and the system circuit board are integrated into one circuit board, so that the internal structure of the vehicle-mounted screen is more compact while the system function of the vehicle-mounted screen is ensured; the internal components are reduced, and meanwhile, the smaller heating value is ensured; the circuit board and the circuit are bound and connected in a special mode, so that the signal wire is better prevented from being interfered by the outside, and the stability of screen display is ensured; the circuit board is fixed on the back of the display assembly in a spaced manner, so that heat generated on the circuit board cannot be directly conducted to the surface of the screen, and the heat conducting pad and the radiating fins enable the radiating effect of the vehicle-mounted screen to be better; the arrangement of the metal frame and the metal bracket enables the mounting mode of the vehicle-mounted screen to be more diversified.

In order to achieve the technical purpose, the technical scheme is as follows.

A component structure of a vehicle-mounted on-screen system comprises a display screen component and a PCBA (printed Circuit Board Assembly), wherein the PCBA is an integrated circuit board, a TFT (thin film transistor) liquid crystal display driving circuit and a display screen system driving circuit are integrated on the PCBA, and the display screen component and the PCBA are bound and connected together through a plurality of FPC (flexible printed Circuit) flat cables; the display screen component comprises a liquid crystal display screen and a backlight module, PINs PIN on the FPC are welded on the PCBA through a hot pressing process, and then the PINs are sealed through sealing black glue; the PCBA is provided with a connector connected with the outside. The utility model integrates various circuit modules of the vehicle-mounted screen on one circuit board, which reduces one circuit board and also reduces electric wires connected with the circuit board compared with the original design of separating the TFT liquid crystal display circuit board and the display screen system circuit board, thus leading the utilization rate of the PCB to be higher and leading the required components in the vehicle-mounted screen to be less; the joint of the FPC flat cable and the PCBA adopts a binding process of black glue sealing, copper wires on the FPC flat cable are directly connected with pins on the circuit board, glue is solidified and covers the pin joint, so that the signal wires can be prevented from being interfered or polluted by the outside, the stability of display communication is better improved, and the required connector between FPC winding displacement and PCBA has been reduced simultaneously, and space on the further saving circuit board when saving the cost.

Furthermore, the upper part of the back surface of the backlight module is provided with a heat conducting pad, the lower part of the back surface of the backlight module is provided with a plurality of flat step columns, and the PCBA is fixed on the step columns. PCBA can be fixed to a plurality of step posts that display screen subassembly back lower part was established, can guarantee simultaneously that the length of step post is shorter, guarantees that the size of on-vehicle screen is thinner.

Furthermore, the step column is composed of a first column body and a second column body which are different in size, and the second column body and the first column body are arranged in a manner of decreasing from the backlight module to the outside in sequence; the PCBA is provided with a mounting hole corresponding to the position of the first column body, and the PCBA is fixed on the first column body through a fastener and the mounting hole, so that the PCBA and a backlight module of the display screen assembly are separated by a second column body interval. The PCBA is fixed on the step column and is separated from the backlight module by a lower column, so that heat generated on the PCBA cannot be directly conducted to the display screen assembly, and the temperature of the surface of the screen is reduced.

Furthermore, the component structure of the vehicle-mounted on-screen system further comprises a clamping groove frame, a metal frame and a shell, wherein the shell is connected with the clamping groove frame in a buckling manner, and the metal frame is positioned between the clamping groove frame and the shell and connected with the clamping groove frame in a buckling manner; the middle part of the clamping groove frame is a hollow part which can pass through the heat conducting pad and the PCBA; the periphery of the hollow part is provided with a covering edge extending to the periphery of the clamping groove frame, and the clamping groove frame is fixed and covers the peripheral frame of the backlight module and the peripheral area of the back of the backlight module; a plurality of U-shaped grooves are formed in the inner side of the bottom edge of the clamping groove frame; the FPC winding displacement is respectively led out from the liquid crystal display screen and is distributed between the bottom edge of the backlight module and the U-shaped groove at the inner side of the bottom edge of the clamping groove frame at intervals. The FPC winding displacement distributes between the U-shaped groove, can reduce the material of draw-in groove frame, need not to increase unnecessary inner space for the FPC winding displacement simultaneously, makes inner structure compacter.

Furthermore, a plurality of clamping grooves are distributed around the clamping groove frame, and a plurality of buckles corresponding to the clamping grooves are arranged on the inner side of the edge of the shell. The shell and the clamping groove frame are preliminarily fastened through the clamping buckles and the clamping grooves.

Furthermore, a plurality of positioning buckles are arranged on the outer surface of the clamping groove frame at intervals, and an arched supporting part is arranged between every two positioning buckles; and the metal frame is provided with a positioning clamping groove matched with the positioning buckle. The clamping groove frame and the metal frame are preliminarily fastened through the positioning buckles and the positioning clamping grooves, the metal frame and the clamping groove frame can be stably fastened through the supporting parts, and stability between the components is guaranteed.

Furthermore, the outer surface of the part, attached to the back surface of the display screen assembly, of the clamping groove frame is further provided with a plurality of positioning columns and mounting columns, the metal frame is provided with positioning holes corresponding to the positioning columns and through holes corresponding to the mounting columns, and the mounting columns penetrate through the through holes and then abut against the shell; and after the shell is buckled with the clamping groove frame, the shell and the metal frame are fastened on the mounting column of the clamping groove frame from the outer surface of the shell through a second fastening piece. The setting of reference column is used for distinguishing metal crate's installation direction, and the reference column is used for fixed with each subassembly of on-vehicle screen, and metal crate's locating hole still plays certain supporting effect when corresponding with the reference column of draw-in groove frame.

Furthermore, a plurality of heat conduction holes are formed in the metal frame, and a heat radiating fin is arranged at one side of the metal frame, which is positioned on the clamping groove frame, and corresponds to the heat conduction pad; after the metal frame is buckled with the clamping groove frame, the radiating fin is tightly attached to the heat conducting pad; the metal frame and the corresponding part of the PCBA extend backwards, so that the middle part of the metal frame is raised to form the metal cover. The heat conducting holes are formed, so that heat generated on the PCBA can be taken away by airflow from the heat conducting holes, and the heat radiating fins can enable heat generated by the display screen assembly to be quickly conducted to the metal frame, namely to the back of the vehicle-mounted screen more quickly, so that the heat radiating effect of the vehicle-mounted screen is further improved; the metal covering covers on PCBA, plays the guard action, especially when the car goes or on-vehicle screen receives the extrusion, can make other subassemblies not interfere the circuit board, further guarantees the stability of on-vehicle screen.

Furthermore, a first opening and a second opening are arranged on the metal cover, the first opening corresponds to the connector, and the second opening is positioned on one side of the metal cover; the outer surface of the metal cover is provided with a metal support, and the metal support is fixed with the metal frame through a plurality of rivet supports. The metal support is connected with metal framework through a plurality of rivet supports and fixes the back, can bear the weight of whole on-vehicle screen, and accessible second opening part loads and unloads when assembling on-vehicle screen, and accessible metal support is fixed when needing to hang on-vehicle screen, makes the mounting means of on-vehicle screen more various and more convenient.

Further, the middle part of the shell is provided with a convex part matched with the metal cover, a third opening is arranged at the position of the convex part corresponding to the connector, and the edge of the third opening extends inwards to surround the connector; and a hollow part for the metal bracket to pass through is arranged in the middle of the protruding part. The shell and the clamping groove frame are buckled to form a whole, so that the vehicle-mounted screen is more convenient to fasten all components, an external wiring harness can penetrate through the third opening to be connected with the connector, and the edge of the third opening extends inwards to be connected with the connector in a butt joint mode to play a fixing effect.

Compared with the prior art, the component structure of the vehicle-mounted on-screen system of the utility model, has the following beneficial effects:

firstly: the utility model discloses a to realize that the required circuit module integration of on-vehicle screen system function is on a circuit board, reduced inside assembly and connecting wire, improved PCB's utilization efficiency, reduced the assembly quantity of spare part, solved the many problems of on-vehicle screen inside assembly.

Secondly, the method comprises the following steps: heat conduction pad and PCBA set up in the fretwork department of draw-in groove frame, and the FPC winding displacement distributes between the U-shaped groove, makes inner structure compacter, has solved the thick problem of on-vehicle screen size.

Thirdly, the method comprises the following steps: the binding process adopting the sealant reduces the use of the connector and ensures the stable communication of the signal wire, the metal cover covers the PCBA to protect the PCBA from interference, and the problem of unstable screen display is solved.

Fourthly: the circuit board and the backlight module are arranged at intervals, and the heat dissipation design of the heat conduction pad, the heat dissipation fins and the heat dissipation holes is adopted, so that the heat dissipation effect of the vehicle-mounted screen is better, and the problem of high surface temperature of the screen is solved.

Drawings

FIG. 1 is an exploded view of the structure of a vehicle panel assembly;

FIG. 2 is a schematic diagram of a display screen assembly and a PCBA;

FIG. 3 is a partial schematic view of the component structure of the on-board on-screen system;

FIG. 4 is a schematic side view of a display screen assembly and a PCBA;

FIG. 5 is a front view of the metal frame;

FIG. 6 is a partial schematic view of a second component configuration of the on-board on-screen system;

FIG. 7 is a schematic inside view of the housing;

reference numerals:

1. a display screen assembly; 11. a thermally conductive pad; 12. a step post; 121. a first column; 122. a second cylinder; 13. a liquid crystal display screen; 14. FPC cable arrangement; 15. a backlight module;

2. PCBA; 21. mounting holes; 22. a connector assembly;

3. a card slot frame; 31. a U-shaped groove; 32. a card slot; 33. positioning a buckle; 34. a support portion; 35. a positioning column; 36. mounting a column;

4. a metal frame; 41. positioning the clamping groove; 42. positioning holes; 43. a through hole; 44. a heat conduction hole; 45. a heat sink; 46. a metal cover; 47. a metal bracket; 48. a rivet support; 491. a first opening; 492. a second opening;

5. a housing; 51. buckling; 52. a projection; 53. a third opening.

Detailed Description

The following describes the component structure of a vehicle-mounted on-screen system according to the present invention in further detail with reference to the following embodiments and accompanying drawings.

As shown in fig. 1 and 2, a component structure of a vehicle-mounted on-screen system includes a display screen component 1 and a PCBA2, the PCBA2 is an integrated circuit board, a driving circuit of a TFT liquid crystal display and a driving circuit of a display screen system are integrated on the PCBA2, and the display screen component 1 and the PCBA2 are bound together by a plurality of FPC cables 14; the display screen component 1 comprises a liquid crystal display screen 13 and a backlight module 15, wherein the PIN PIN on the FPC flat cable 14 is welded on the PCBA2 through a hot pressing process by the FPC flat cable 14, and the PIN is sealed by sealing black glue; the PCBA2 is provided with a connector 22 connected with the outside. The utility model integrates various circuit modules of the vehicle-mounted screen on one circuit board, which reduces one circuit board and wires connected with the circuit board compared with the original design of separating the TFT liquid crystal display circuit board and the display screen system circuit board, thus leading the utilization rate of the PCB to be higher and leading the required components in the vehicle-mounted screen to be less; the joint of the FPC flat cable 14 and the PCBA2 adopts a binding process of black glue sealing, copper wires on the FPC flat cable 14 are directly connected with pins on the circuit board, and glue is solidified and covers the pin joint, so that the signal wires can be prevented from being interfered or polluted by the outside, the stability of display communication is better improved, meanwhile, connectors required between the FPC flat cable 14 and the PCBA2 originally are reduced, the cost is saved, and meanwhile, the space on the circuit board is further saved.

As shown in fig. 3 and 4, the upper portion of the back surface of the backlight module 15 is provided with a thermal pad 11, the lower portion of the back surface of the backlight module 15 is provided with a plurality of flat step posts 12, and the PCBA2 is fixed on the plurality of step posts 12. The PCBA2 can be fixed to a plurality of step posts 12 that the display screen subassembly 1 back lower part was established, can guarantee simultaneously that the length of step post 12 is shorter, guarantees that the size of on-vehicle screen is thinner.

As shown in fig. 4, the step post 12 is composed of two first posts 121 and two second posts 122 with different sizes, and the second posts 122 and the first posts 121 are arranged in a manner of decreasing from the backlight module 15 to the outside; the PCBA2 is provided with a mounting hole 21 corresponding to the position of the first column 121, and the PCBA2 is fixed on the first column 121 through a fastener and the mounting hole 21, so that the PCBA2 and the backlight module 15 of the display screen assembly 1 are separated by an interval of the second column 122. The PCBA2 is mounted on the step post 12 at a lower post distance from the backlight module 15 such that heat generated on the PCBA2 is not conducted directly to the display screen assembly 1, the temperature of the screen surface is reduced.

As shown in fig. 1 and 3, the component structure of the vehicle-mounted on-screen system further includes a card slot frame 3, a metal frame 4 and a housing 5, the housing 5 is connected to the card slot frame 3 in a buckling manner, and the metal frame 4 is located between the card slot frame 3 and the housing 5 and connected to the card slot frame 3 in a buckling manner; the middle part of the clamping groove frame 3 is a hollow part which can pass through the heat conducting pad 11 and the PCBA 2; the periphery of the hollow part is provided with a covering edge extending to the periphery of the card slot frame 3, and the card slot frame 3 is fixed and covers the peripheral frame of the backlight module 15 and the peripheral area of the back of the backlight module 15; a plurality of U-shaped grooves 31 are formed in the inner side of the bottom edge of the card slot frame 3; the FPC cables 14 are led out from the liquid crystal display 13 and are spaced apart from each other between the bottom edge of the backlight module 15 and the U-shaped grooves 31 on the inner side of the bottom edge of the card slot frame 3. The FPC flat cable 14 is distributed among the U-shaped grooves 31, so that the material consumption of the clamping groove frame 3 can be reduced, and meanwhile, the extra internal space does not need to be added for the FPC flat cable 14, so that the internal structure is more compact.

As shown in fig. 3 and 7, a plurality of card slots 32 are distributed around the card slot frame 3, and a plurality of fasteners 51 corresponding to the card slots 32 are arranged on the inner side of the edge of the housing 5. The housing 5 and the card slot frame 3 are preliminarily fastened through the fastener 51 and the card slot 32.

As shown in fig. 3 and 5, a plurality of positioning buckles 33 are arranged on the outer surface of the card slot frame 3, the positioning buckles 33 are arranged at intervals, and an arched supporting portion 34 is respectively arranged between every two positioning buckles 33; and a positioning clamping groove 41 matched with the positioning buckle 33 is arranged on the metal frame 4. The clamping groove frame 3 and the metal frame 4 are preliminarily fastened through the positioning buckle 33 and the positioning clamping groove 41, and the metal frame 4 and the clamping groove frame 3 can be stably fastened through the support part 34.

As shown in fig. 1, 3 and 5, the external surface of the portion of the card slot frame 3 attached to the back surface of the display screen assembly 1 is further provided with a plurality of positioning posts 35 and mounting posts 36, the metal frame 4 is provided with positioning holes corresponding to the positioning posts 35 and through holes 43 corresponding to the mounting posts 36, and the mounting posts 36 are abutted to the housing 5 after passing through the through holes 43; the housing 5 is fastened to the card slot frame 3 and then the housing 5 and the metal frame 4 are fastened to the mounting posts 36 of the card slot frame 3 from the outer surface of the housing 5 by the second fastening member. The positioning column 35 is used for distinguishing the installation direction of the metal frame 4, the installation column 36 is used for fixing each component of the vehicle-mounted screen, and the positioning hole of the metal frame 4 corresponds to the positioning column 35 of the card slot frame 3 and simultaneously has a certain supporting effect.

As shown in fig. 5 and 6, a plurality of heat conduction holes 44 are formed in the metal frame 4, and a heat dissipation plate 45 is disposed at a position of one side of the metal frame 4, which corresponds to the heat conduction pad 11, of the card slot frame 3; after the metal frame 4 is buckled with the slot frame 3, the radiating fins 45 are tightly attached to the heat conducting pad 11; the metal frame 4 extends backward from the corresponding portion of the PCBA2, so that the middle portion of the metal frame 4 is raised to form a metal cover 46. The arrangement of the heat conducting holes can lead the heat generated on the PCBA2 to be taken away by airflow from the heat conducting holes 44, and the arrangement of the heat radiating fins 45 can lead the heat generated by the display screen component 1 to be quickly conducted to the metal frame 4, namely to the back, thereby further improving the heat radiating effect of the vehicle-mounted screen; the metal cover 46 covers the PCBA2 to play a role in protection, and particularly, when the automobile runs or the vehicle-mounted screen is extruded, other components cannot interfere with the circuit board, and the stability of the vehicle-mounted screen is further guaranteed.

As shown in fig. 5 and 6, a first opening 491 and a second opening 492 are provided on the metal cover 46, the first opening 491 corresponds to the connector 22, and the second opening 492 is located on one side of the metal cover 46; a metal bracket 47 is arranged on the outer surface of the metal cover 46, and the metal bracket 47 is fixed with the metal frame 4 through a plurality of rivet brackets 48. After the metal support 47 is fixedly connected with the metal frame 4 through the rivet supports 48, the weight of the whole vehicle-mounted screen can be borne, the vehicle-mounted screen can be assembled and disassembled through the second opening 492, and the vehicle-mounted screen can be hung and installed through the metal support 47 to be fixed, so that the vehicle-mounted screen can be installed more variously and more conveniently.

As shown in fig. 1 and 7, the middle portion of the housing 5 has a protruding portion 52 engaged with the metal cover 46, a third opening 53 is formed at a position of the protruding portion 52 corresponding to the connector 22, and an edge of the third opening 53 extends inward to surround the connector 22; the middle position of the protruding part 52 is provided with a hollow part for the metal bracket 47 to pass through. The shell 5 and the card slot frame 3 are buckled to form a whole, so that the vehicle-mounted screen is more convenient to fasten all components, an external wiring harness can penetrate through the third opening 53 to be connected with the connector 22, and the edge of the third opening 53 extends inwards to play a role in fixing the connector 22.

While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims

1. The utility model provides a subassembly structure of on-vehicle on-screen system, includes display screen subassembly and PCBA, its characterized in that: the PCBA is an integrated circuit board, a driving circuit of a TFT liquid crystal display and a driving circuit of a display screen system are integrated on the PCBA, and the display screen assembly and the PCBA are bound and connected together through a plurality of FPC flat cables; the display screen assembly comprises a liquid crystal display screen and a backlight module, the PIN PIN on the FPC is welded on the PCBA through a hot pressing process, and the PIN is sealed through sealing black glue; the PCBA is provided with a connector connected with the outside.

2. The assembly structure of a vehicle on-screen system according to claim 1, characterized in that: the heat conducting pad is arranged on the upper portion of the back face of the backlight module, the flat step columns are arranged on the lower portion of the back face of the backlight module, and the PCBA is fixed on the step columns.

3. The assembly structure of a vehicle on-screen system according to claim 2, characterized in that: the step column is composed of a first column body and a second column body which are different in size, and the second column body and the first column body are arranged in a manner of decreasing from the backlight module to the outside in sequence; the PCBA is provided with a mounting hole corresponding to the position of the first column body, and the PCBA is fixed on the first column body through a fastener and the mounting hole, so that the PCBA and the backlight module of the display screen assembly are separated by a second column body.

4. The assembly structure of a vehicle on-screen system according to any one of claims 1 to 3, characterized in that: the clamping groove frame is arranged between the clamping groove frame and the shell and is connected with the clamping groove frame in a buckling mode; the middle part of the clamping groove frame is a hollow part which can pass through the heat conducting pad and the PCBA; the periphery of the hollow part is provided with a covering edge extending to the periphery of the clamping groove frame, and the clamping groove frame is fixed and covers the peripheral frame of the backlight module and the peripheral area of the back of the backlight module; a plurality of U-shaped grooves are formed in the inner side of the bottom edge of the clamping groove frame; the FPC winding displacement is respectively led out from the liquid crystal display screen and is distributed between the bottom edge of the backlight module and the U-shaped groove at the inner side of the bottom edge of the clamping groove frame at intervals.

5. The assembly structure of a vehicle on-screen system according to claim 4, characterized in that: a plurality of clamping grooves are distributed around the clamping groove frame, and a plurality of buckles corresponding to the clamping grooves in position are arranged on the inner side of the edge of the shell.

6. The assembly structure of a vehicle on-screen system according to claim 5, characterized in that: the outer surface of the clamping groove frame is provided with a plurality of positioning buckles which are arranged at intervals, and an arched supporting part is arranged between every two positioning buckles; and the metal frame is provided with a positioning clamping groove matched with the positioning buckle.

7. The assembly structure of a vehicle on-screen system according to claim 6, characterized in that: the outer surface of the part, attached to the back surface of the display screen assembly, of the clamping groove frame is further provided with a plurality of positioning columns and mounting columns, the metal frame is provided with positioning holes corresponding to the positioning columns and through holes corresponding to the mounting columns, and the mounting columns penetrate through the through holes and then abut against the shell; and after the shell is buckled with the clamping groove frame, the shell and the metal frame are fastened on the mounting column of the clamping groove frame from the outer surface of the shell through a second fastening piece.

8. The assembly structure of a vehicle on-screen system according to claim 7, characterized in that: the metal frame is provided with a plurality of heat conduction holes, and a radiating fin is arranged at one side of the clamping groove frame and corresponds to the heat conduction pad; after the metal frame is buckled with the clamping groove frame, the radiating fin is tightly attached to the heat conducting pad; the metal frame and the corresponding part of the PCBA extend backwards, so that the middle part of the metal frame is raised to form the metal cover.

9. The assembly structure of a vehicle on-screen system according to claim 8, characterized in that: a first opening and a second opening are arranged on the metal cover, the first opening corresponds to the connector, and the second opening is positioned on one side of the metal cover; the outer surface of the metal cover is provided with a metal support, and the metal support is fixed with the metal frame through a plurality of rivet supports.

10. The assembly structure of a vehicle on-screen system according to claim 9, characterized in that: the middle part of the shell is provided with a convex part matched with the metal cover, a third opening is arranged at the position of the convex part corresponding to the connector, and the edge of the third opening extends inwards to surround the connector; and a hollow part for the metal bracket to pass through is arranged in the middle of the protruding part.