A split light box structure for a combined instrument

Abstract

The present invention relates to the technical field of vehicle-mounted instrument light boxes, and in particular to a split light box structure for a combined instrument, comprising a display screen, a meter plate attached to the display screen, and two light boxes respectively arranged on both sides of the display screen; a character area is extended on both sides of the meter plate; and the character area is attached to the light box. The purpose of the present invention is to provide a split light box structure for a combined instrument, and the technical solution provided by the present invention solves the technical problems of the existing overall light box being heavy, large in size, and easy to deform.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle-mounted instrument light boxes, and in particular to a split light box structure for a combined instrument. Technical Background

[0002] Automotive instrument products are key components of the center console in the car. They are the interactive interface between people and cars, providing drivers with the required information on vehicle operating parameters, faults, mileage, etc., and are essential components for every car. The intuitive and beautiful display of the instrument makes driving not only a necessity for transportation, but also a part of comfortable life, while the accuracy and reliability of parameter transmission are directly related to the safety of car driving.

[0003] Nowadays, more and more cars are using combination instruments to replace the traditional instrument structure that relies on motor-driven pointers. The shape of the combination instrument is both beautiful and stable. At the same time, the use of TFT display technology makes the display style of the instrument more colorful.

[0004] The traditional design of the structure of the automobile combination instrument is as follows Figure 1 As shown, it is generally composed of a mask 10, a front frame 20, a dial plate 30, a TFT display screen 40, a light box 50, a PCB circuit board 60, a rear cover 70, and fixing screws 80. Among them, there is a key structural part light box 50 inside the combined instrument, which is embedded inside and plays the role of receiving the three parts of TFT display screen 40, dial plate 30, and PCB circuit board 60. At the same time, it also plays the function of optical transmission, that is, guiding the several LED light sources on the PCB circuit board to the corresponding display characters on the dial plate, so the light box is an optical structural part.

[0005] The traditional structure design of the instrument cluster usually makes the light box into an integral body, but the integral light box has the technical problems of being heavy, large in size and easy to deform. Summary of the invention

[0006] The purpose of the invention is to provide a split light box structure for a combination instrument. The technical solution provided by the invention solves the technical problems of the existing overall light box being heavy, large in size and easy to deform.

[0007] In order to solve the above technical problems, the present invention provides a split light box structure for a combination instrument, including a display screen, a nameplate attached to the display screen, and two light boxes respectively arranged on both sides of the display screen; a character area is extended on both sides of the nameplate; and the character area is attached to the light box.

[0008] Preferably, a PCB board with LED lights is arranged below the display screen and the light box; the LED lights correspond to the positions of the character areas.

[0009] Preferably, a light-transmitting through hole is opened on the light box at a position corresponding to the LED lamp, and a bowl-shaped reflecting surface is provided at the light-transmitting through hole.

[0010] Preferably, a regional reflective surface is formed on the light box at a position other than the bowl-mounted reflective surface.

[0011] Preferably, a support plate for carrying the display screen is extended from the bottom of the light box.

[0012] Preferably, the support plate is provided with supporting bones for supporting the display screen, positioning bones for positioning the display screen, pre-fixing buckles for pre-fixing the display screen, and limiting hooks for limiting the display screen.

[0013] Preferably, a conductive foam limiting groove for assembling conductive foam is formed on the back of the light box; the conductive foam is in contact with the metal back cover on the back of the display screen and the metal layer of the PCB board at the same time.

[0014] Preferably, the portion of the watch plate that is in contact with the display screen is a display window.

[0015] Preferably, the character area of ​​the meter plate includes a water temperature indication scale area, a water temperature indicator area, an alarm character area, an oil level indicator area, and an oil level indication scale area.

[0016] Preferably, a positioning hole is also provided on the watch plate.

[0017] It can be seen from the above that the application of the technical solution provided by the present invention has the following beneficial effects: the present invention splits the integral light box into a separate left light box and a right light box, which can also realize the function of transmitting light from the light source and fixing the TFT display screen and the nameplate; the left light box and the right light box after the splitting have a simple structure, a small size, and are easy to control, and the deformation is also small, while achieving the purpose of lightweight; a single part has a small size, a small deformation, and a high flatness, so that it fits well with the PCB circuit board and the nameplate, reducing the poor light crosstalk between the nameplate characters. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the description of the embodiments of the present invention or the prior art. Obviously, the drawings described below are only part of the embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0019] Figure 1 An exploded view of the split light box structure of the instrument cluster according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a watch plate according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the front structure of the left and right light boxes according to an embodiment of the present invention;

[0022] Figure 4 It is a schematic diagram of the back structure of the left and right light boxes according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The traditional structure design of the instrument cluster usually makes the light box into an integral body, but the integral light box has the technical problems of being heavy, large in size and easy to deform.

[0025] From a functional analysis perspective, the function of the light box is to transmit light to the LED light source and to pre-fix the display screen.

[0026] See also Figure 1-4 In order to solve the above technical problems, the present embodiment provides a split light box structure of a combination instrument, including a display screen 40, a meter plate 30 attached to the display screen 40, and two light boxes 50 respectively arranged on both sides of the display screen 40.

[0027] like Figure 2 As shown, character areas are formed on both sides of the plate 30, and the character areas are attached to the light box 50. The character area includes left display characters 31 and right display characters 32, and the left and right display characters can be divided into three areas respectively, area 1 is a water temperature indication scale area, area 2 is a water temperature indicator area, areas 3 and 4 are alarm character areas, area 5 is an oil level indicator area, and area 6 is an oil level indicator scale area.

[0028] The middle area of ​​the watch plate 30, that is, the part of the watch plate 30 that is in contact with the display screen 40, is a display window 33. A positioning circular hole and a waist-shaped hole 34 are also formed on the watch plate 30.

[0029] In summary, the watch plate 30 can be divided into three parts:

[0030] The display window in the middle is a display area corresponding to the display screen 40, and can display the preset display content by driving the TFT display screen 40, and its length is L;

[0031] There are characters displayed on the left and right sides of the nameplate 30, and their lengths correspond to Lleft and Lright. To display the characters, an additional backlight source is required, usually an LED light source. A PCB board 60 with LED lights is provided under the display screen 40 and the light box 50. The positions of the LED lights correspond to the character areas. How to transmit the LED light to the display characters of the nameplate 30 requires a light transmitting part to be designed in the structure, namely the light box 50.

[0032] In this embodiment, the structures of the left and right light boxes 50 are described as follows: Figure 4 As shown:

[0033] The alarm characters, oil level characters, water temperature characters, scale characters, etc. correspond to the corresponding LED light sources of different colors; the structures of the left and right light boxes 50 are basically the same, and their front structures mainly include the bottom plates 511, 521 (section line areas) of the nameplate 30. The bottom plates 511, 521 of the nameplate 30 are the basic features of the light box 50, and the surface formed thereon matches the nameplate 30.

[0034] Reflective surfaces 512 and 521 are formed on the bottom plates 511 and 521 of the meter plate 30 to reflect the light of the LED so that the brightness of the illuminated characters on the meter plate 30 is more uniform. It should be noted that there are two types of reflective surfaces: reflective surfaces 1 and 3 are bowl-shaped reflective surfaces, each of which corresponds to an LED light and a character of the meter plate 30, and a light-transmitting through hole is opened at the corresponding position on the light box 50; the reflective surface of the reflective surface 2 is located outside the reflective surfaces 1 and 3, and the water temperature indicator and the oil level indicator are usually illuminated by several LED lights, so as to use a small number of LEDs to illuminate an area.

[0035] Extending from the bottom of the light box 50 are support plates 514, 524 that support the display screen 40. The support plates 514, 524 are extensions of the sides of the bottom plate of the watch face 30. The support plates 514, 524 only extend out of a small area, and are smaller in size than a traditional integral light box 50 in which the support plate extends from the left side of the light box 50 to the right side of the light box 50.

[0036] The support plate is provided with nameplate 30 positioning posts 513, 523 for assembling the nameplate 30; four display screen 40 supporting bones 515, 525 for supporting the display screen 40; display screen 40 positioning bones 516, 526 for positioning the shape of the TFT display screen 40; display screen 40 pre-fixing buckles 517, 527 for pre-fixing the TFT display screen 40, the display screen 40 pre-fixing buckles 517, 527 can prevent the TFT display screen 40 from falling off when the assembled TFT display screen 40 is flipped; display screen 40 limiting hooks 518, 528 for limiting the TFT display screen 40, the display screen 40 limiting hooks 518, 528 can prevent the TFT display screen 40 from loosening after assembly, and the display screen 40 limiting hooks 518, 528 can be elastic buckles, the purpose of which is to absorb the TFT shape tolerance and the manufacturing tolerance of the light box 50 itself.

[0037] The display screen 40 support bones, the display screen 40 positioning bones and the display screen 40 limit hooks completely position the TFT display screen 40 in six degrees of freedom, and there will be no virtual displacement after assembly; and the display screen 40 limit hooks corresponding to the display screen 40 positioning bones are set to reduce the matching tolerance between the TFT display screen 40 and the left and right light boxes 50.

[0038] In the light box 50 fixing structure, the back of the left and right light boxes 50 are formed with:

[0039] The light box 50 positioning posts 531 and 541 are used to position the light box 50 on the left and right light boxes 50 respectively with the PCB board 60;

[0040] The light box 50 is pre-fixed with buckles 532 and 542. It is recommended that each light box 50 use four buckles distributed around the light box 50;

[0041] The light box 50-PCB fitting planes 533 and 543 are used to match with the PCB board 60;

[0042] Screw holes 534 and 544, it is recommended that each light box 50 be locked with at least two screw holes, which not only meets the optical function, but also ensures the overall structural strength formed by the left and right light boxes 50, the TFT display screen 40, the PCB board 60, the back cover, and the front frame.

[0043] The above fixing structure ensures the structural strength of the two light boxes 50, the TFT display screen 40, the PCB circuit board, the rear cover and the front frame after the final assembly.

[0044] In addition, lamp grooves 535 and 545 are provided on the light box 50, which are mainly used to pass LED light. At the same time, the walls between the lamp grooves can also isolate light to avoid crosstalk between different LED light sources, that is, the light from adjacent LED light sources enters each other's area respectively. When the light passes through the lamp grooves, the light is dispersed and partially reflected on the reflective surface on the front of the light box 50 to illuminate the corresponding characters of the plate 30; and conductive foam limit grooves 536 and 546. When the customer has higher requirements on static electricity and EMC, conductive foam can be installed on the conductive foam limit grooves to make the metal back cover of the back of the TFT display screen 40 contact with the metal coating of the PCB board 60, so as to achieve the effect of conducting static electricity.

[0045] The light box 50 parts can be made of white plastic materials, such as PC, ABS, PP, etc., which can not only transmit light but also separate light crosstalk.

[0046] In summary, from the perspective of functional analysis, the integral light box is split into a left light box and a right light box, which can also achieve the function of transmitting light source and fixing TFT display screen and watch plate. The split left and right light boxes have simple structure, small size, easy to control, small deformation, and achieve the purpose of lightweight; in order not to reduce the overall structural strength of the light box, the left and right light boxes are each fixed with two to three screws.

[0047] The above-described implementation methods do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described implementation methods shall be included in the protection scope of the technical solution.

Claims

1. A split light box structure for a combined instrument, characterized in that: It includes a display screen, a watch plate attached to the display screen, and two light boxes respectively arranged on both sides of the display screen; Character areas are formed by extending on both sides of the plate; the character areas are attached to the light box; A PCB board with LED lights is arranged below the display screen and the light box; the LED lights correspond to the positions of the character areas; A light-transmitting through hole is provided on the light box at a position corresponding to the LED lamp, and a bowl-shaped reflecting surface is provided at the light-transmitting through hole; A regional reflective surface is formed on the light box at a position other than the bowl-shaped reflective surface; A support plate for carrying the display screen is extended from the bottom of the light box; The support plate is provided with supporting bones for supporting the display screen, positioning bones for positioning the display screen, pre-fixing buckles for pre-fixing the display screen, and limiting hooks for limiting the display screen.

2. The split light box structure of the combined instrument according to claim 1, characterized in that: A conductive foam limiting groove for assembling conductive foam is formed on the back of the light box; the conductive foam is in contact with the metal back cover on the back of the display screen and the metal layer of the PCB board at the same time.

3. The split light box structure of the combined instrument according to claim 2, characterized in that: The portion of the watch plate that is in contact with the display screen is a display window.

4. The split light box structure of the combined instrument according to claim 3, characterized in that: The character area of ​​the meter plate includes a water temperature indication scale area, a water temperature indicator area, an alarm character area, an oil quantity indicator area, and an oil quantity indication scale area.

5. The split light box structure of the combined instrument according to claim 4, characterized in that: A positioning hole is also provided on the plate.

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