Backlight structure of side shooting lamp of explosion-proof lamp

Abstract

This utility model discloses a backlight structure for a side-lit explosion-proof lamp. Wedge-shaped blocks on the inner wall of the housing are used to position and fix a light guide plate. The stepped portion formed by the second end and the first end of the light guide plate, in conjunction with the wedge-shaped blocks on the inner wall of the housing, prevents the light guide plate from moving upwards. The mounting positions for the corresponding LED beads inside the light guide plate are designed as non-penetrating blind holes, further restricting the upward movement of the beads. The wedge-shaped grooves, combined with the wedge-shaped design of the beads, prevent the LED beads from moving outwards towards the light guide plate. During assembly, the LED bead board is first inserted into the corresponding mounting positions in the light guide plate from bottom to top. Then, the reflective film, light guide plate, and light-diffusing sheet are placed into the housing in the following order. The housing is made of PC material. When installing the light guide plate, applying slight pressure allows the light guide plate to snap into the housing. At this point, due to the interlocking of the light guide plate and the wedge-shaped blocks on the inner wall of the housing, the LED beads are fixed in their inherent positions and cannot move.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a backlight structure for a side-lit explosion-proof lamp. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.

[0003] The existing side-lit backlights of LCDs are planar light guide plate structures, which are generally bonded to the outer shell with double-sided adhesive. They are easily lifted by external forces. At the same time, the positions of the LEDs are square through-holes. When the LEDs enter the grooves, they may shift upwards or outwards. When the LEDs are offset to a certain position, it causes the light path to be unstable, resulting in LED explosion.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that the above technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a backlight structure for the side-lit lamp of an explosion-proof lamp, in order to address the shortcomings of the existing technology.

[0006] This application discloses a backlight structure for a side-lit explosion-proof lamp, including:

[0007] A light guide plate, comprising a first end and a second end disposed on the first end, wherein the outer diameter of the second end is smaller than the outer diameter of the first end, and a stepped portion is formed at the connection between the second end and the first end, and a mounting position is also provided on the side of the light guide plate;

[0008] A reflective film and a light-diffusing sheet are provided, wherein the reflective film is installed at the first end of the light guide plate and the light-diffusing sheet is installed at the second end of the light guide plate;

[0009] LED bead board, including a circuit board and LED beads on its end face, wherein the circuit board is disposed on the side of the light guide plate and the LED beads are installed in the mounting position of the light guide plate;

[0010] The outer shell, the reflective film, the light guide plate and the light uniform sheet are placed inside the outer shell in sequence. The inner wall of the outer shell corresponding to the side of the light guide plate is provided with a plurality of wedge-shaped blocks, and the wedge-shaped blocks can be locked on the stepped part of the light guide plate.

[0011] Furthermore, in the backlight structure of the side-lit explosion-proof lamp described above, the mounting position of the light guide plate is a blind hole, and the opening of the mounting position is the first end of the light guide plate.

[0012] Furthermore, in the backlight structure of the side-lit explosion-proof lamp described above, both the LED beads and the mounting positions are wedge-shaped structures. The cross-sectional area of ​​the LED beads gradually decreases from the inside to the outside along the light guide plate, and the angle between the side of the LED beads and the circuit board is 60°.

[0013] Furthermore, in the backlight structure of the side-lit explosion-proof lamp described above, the height of the second end of the light guide plate is 0.5mm.

[0014] Furthermore, in the backlight structure of the side-lit explosion-proof lamp described above, the distance between the outer wall of the first end and the outer wall of the second end of the light guide plate is 0.5mm.

[0015] Furthermore, in the backlight structure of the side-lit explosion-proof lamp described above, the protrusion height of the wedge-shaped block is 0.4mm.

[0016] In summary, the structure adopted in this embodiment of the present invention has the following advantages:

[0017] The backlight structure of the side-lit explosion-proof lamp described in this utility model has a wedge-shaped block on the inner wall of the housing for fixing the light guide plate. The outer diameter of the second end of the light guide plate is smaller than that of the first end. The step formed by the second end and the first end of the light guide plate, in conjunction with the wedge-shaped block on the inner wall of the housing, restricts the light guide plate from moving upward. The mounting position of the LED beads inside the light guide plate is set as a non-penetrating blind hole, which restricts the upward movement of the beads. The wedge-shaped groove, in conjunction with the wedge-shaped design of the beads, prevents the LED beads from moving outward to the light guide plate. During assembly, the LED bead board is first inserted into the corresponding position of the mounting position in the light guide plate from bottom to top. Then, the reflective film, light guide plate, and light diffuser are placed into the housing in the order of reflective film, light guide plate, and light diffuser. The housing is made of PC material. When installing the light guide plate, a slight pressing force is applied to make the light guide plate snap into the housing. At this time, because the light guide plate and the wedge-shaped block on the inner wall of the housing interlock, the LED beads are fixed in their inherent positions and cannot move, reducing the phenomenon of lamp explosion.

[0018] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the backlight structure of the side-lit explosion-proof lamp in this embodiment of the present invention;

[0021] Figure 2 This is a top view of the backlight structure of the side-lit explosion-proof lamp in this embodiment of the present invention.

[0022] The reference numerals in the above figures are as follows: 1. Light guide plate; 11. First end; 12. Second end; 13. Mounting position; 2. Reflective film; 3. Light diffuser; 4. Circuit board; 5. LED beads; 6. Housing; 61. Wedge block. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0024] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0025] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0026] Reference Figures 1 to 2 As shown in the figure, this application discloses a backlight structure for a side-lit explosion-proof lamp, including:

[0027] The light guide plate 1 includes a first end 11 and a second end 12 disposed on the first end 11. The outer diameter of the second end 12 is smaller than the outer diameter of the first end 11. A step is formed at the connection between the second end 12 and the first end 11. The light guide plate 1 also has a mounting position 13 on its side. The light guide plate 1 is made of optical grade transparent acrylic with a thickness of 2mm-5mm.

[0028] The reflective film 2 and the light-diffusing sheet 3 are installed at the first end 11 of the light guide plate 1 and at the second end 12 of the light guide plate 1. The reflective film 2 is PET or PC with an aluminum-coated front and a thickness of 100μm-200μm. The light-diffusing sheet 3 is optical grade PC or PET with a thickness of 100μm-300μm. The light-diffusing effect is achieved through surface microstructure design or the addition of internal diffused particles.

[0029] The LED bead board includes a circuit board 4 and LED beads 5 on its end face. The circuit board 4 is disposed on the side of the light guide plate 1, and the LED beads 5 are installed in the mounting position 13 of the light guide plate 1.

[0030] The outer shell 6 contains the reflective film 2, the light guide plate 1, and the light uniform sheet 3, which are sequentially placed inside the outer shell 6. The inner wall of the outer shell 6, corresponding to the side of the light guide plate 1, is provided with a plurality of wedge-shaped blocks 61, and the wedge-shaped blocks 61 can be locked on the stepped portion of the light guide plate 1. The outer shell 6 is made of PC material.

[0031] Specifically, in this embodiment, the mounting position 13 of the light guide plate 1 is a blind hole, and the opening of the mounting position 13 is the first end 11 of the light guide plate 1. The LED beads 5 need to be inserted into the corresponding position of the mounting position 13 in the light guide plate 1 in an upward direction (that is, the LED beads 5 enter the light guide plate 1 from the first end 11 and move towards the second end 12). Since the mounting position 13 is a blind hole, it can allow the LED beads 5 to move upward.

[0032] Specifically, in this embodiment, both the LED bead 5 and the mounting position 13 are wedge-shaped structures. The cross-sectional area of ​​the LED bead 5 gradually decreases from the inside to the outside along the light guide plate 1. The angle between the side of the LED bead 5 and the circuit board 4 is 60°.

[0033] Specifically, in this embodiment, the height of the second end 12 of the light guide plate 1 is 0.5mm.

[0034] Specifically, in this embodiment, the distance between the outer wall of the first end 11 and the outer wall of the second end 12 of the light guide plate 1 is 0.5 mm.

[0035] Specifically, in this embodiment, the protrusion height of the wedge block 61 is 0.4 mm.

[0036] With the above structure, the wedge-shaped block 61 on the inner wall of the outer shell 6 is used to fix the light guide plate 1. The outer diameter of the second end 12 of the light guide plate 1 is 0.5mm smaller than the outer diameter of the first end 11. The step portion formed by the second end 12 and the first end 11 of the light guide plate 1 cooperates with the wedge-shaped block 61 on the inner wall of the outer shell 6 to prevent the light guide plate 1 from moving upward. The mounting position 13 of the LED bead 5 inside the light guide plate 1 is set as a non-penetrating blind hole to restrict the bead from moving upward. The wedge-shaped groove cooperates with the wedge-shaped design of the bead to prevent the LED bead 5 from moving to the outside of the light guide plate 1. During assembly, the LED bead board is first inserted into the corresponding position of mounting position 13 in the light guide plate 1 from bottom to top. Then, the reflective film 2, light guide plate 1, and light diffuser 3 are placed into the housing 6 in the order of reflective film 2, light guide plate 1, and light diffuser 3. The housing 6 is made of PC material. When installing the light guide plate 1, a slight pressing force is applied to make the light guide plate 1 snap into the housing 6. At this time, because the wedge block 61 on the inner wall of the light guide plate 1 and the housing 6 interlock, the LED bead 5 is fixed in its inherent position and cannot move, reducing the phenomenon of lamp explosion.

[0037] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.

[0038] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0039] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. A backlight structure for a side-lit explosion-proof lamp, characterized in that, include: A light guide plate, comprising a first end and a second end disposed on the first end, wherein the outer diameter of the second end is smaller than the outer diameter of the first end, and a stepped portion is formed at the connection between the second end and the first end, and a mounting position is also provided on the side of the light guide plate; A reflective film and a light-diffusing sheet are provided, wherein the reflective film is installed at the first end of the light guide plate and the light-diffusing sheet is installed at the second end of the light guide plate; LED bead board, including a circuit board and LED beads on its end face, wherein the circuit board is disposed on the side of the light guide plate and the LED beads are installed in the mounting position of the light guide plate; The outer shell, the reflective film, the light guide plate and the light uniform sheet are placed inside the outer shell in sequence. The inner wall of the outer shell corresponding to the side of the light guide plate is provided with a plurality of wedge-shaped blocks, and the wedge-shaped blocks can be locked on the stepped part of the light guide plate.

2. The backlight structure of the side-lit explosion-proof lamp according to claim 1, characterized in that, The mounting position of the light guide plate is a blind hole, and the opening of the mounting position is the first end of the light guide plate.

3. The backlight structure of the side-lit explosion-proof lamp according to claim 2, characterized in that, Both the LED bead and the mounting position are wedge-shaped structures. The cross-sectional area of ​​the LED bead gradually decreases from the inside to the outside along the light guide plate. The angle between the side of the LED bead and the circuit board is 60°.

4. The backlight structure of the side-lit explosion-proof lamp according to claim 1, characterized in that, The height of the second end of the light guide plate is 0.5 mm.

5. The backlight structure of the side-lit explosion-proof lamp according to claim 1, characterized in that, The distance between the outer wall of the first end and the outer wall of the second end of the light guide plate is 0.5 mm.

6. The backlight structure of the side-lit explosion-proof lamp according to claim 1, characterized in that, The protrusion height of the wedge block is 0.4 mm.

Images