A light guide plate for car logos

Abstract

This utility model relates to a light guide plate for automotive logos, belonging to the field of automotive logo technology. It solves the problem that in existing light guide plates, a portion of the light beam is emitted radially outwards, resulting in weak light intensity at the edges and uneven overall brightness. The light guide plate includes a main body with grooves that mate with a light source. Several anti-light-transmitting grooves are arranged circumferentially on the radial outer edge of the main body. These anti-light-transmitting grooves have a semi-circular cross-section and are evenly and spaced apart on the radial outer edge of the main body. Reflection occurs on the arc-shaped surface with the anti-light-transmitting grooves, reducing the amount of light emitted outwards and achieving anti-light transmission, thus ensuring the uniformity of light intensity across the entire light guide plate.

Description

Technical Field

[0001] This utility model relates to the field of automotive logo technology, and in particular to a light guide plate for automotive logos. Background Technology

[0002] The existing patent publication number "CN109515342A" discloses a uniformly luminous car emblem, including a base, an outer ring, an LED driver circuit board, a light guide plate, and a car emblem carrier plate. A photosensitive switch is provided at the bottom of the base. The LED driver circuit board is fixed inside the base, and LED lights are installed at its edges and center. The light guide plate is installed on the right side of the LED driver circuit board, and LED light holes are nested within the light guide plate. A translucent paper covers the light guide plate. The car emblem carrier plate is installed on the right side of the translucent paper, and a hollowed-out car emblem is mounted on the carrier plate. Screw holes are provided on the base, LED driver circuit board, light guide plate, translucent paper, and car emblem carrier plate. The outer ring is provided with screws and a photosensitive switch cover, and the screws are connected to the base through the screw holes.

[0003] The above description has the following problem: when the light source shines on this light guide plate, part of the light beam that enters the light guide plate will be emitted out along the radial direction of the light guide plate, resulting in weaker light intensity at the edge of the light guide plate and uneven brightness of the entire light guide plate. Utility Model Content

[0004] The purpose of this invention is to provide a light guide plate for automotive logos, which solves the problem that the light beam in existing light guide plates is emitted radially, resulting in weak light intensity at the edges of the light guide plate and uneven overall brightness of the light guide plate.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a light guide plate for automobile logos, including a light guide plate body. The light guide plate body is provided with a groove that cooperates with a light source. A plurality of anti-light-transmitting grooves are provided circumferentially on the radial outer edge surface of the light guide plate body. The cross-section of each anti-light-transmitting groove is semi-circular. The plurality of anti-light-transmitting grooves are evenly and spaced apart on the radial outer edge surface of the light guide plate body.

[0006] Furthermore, a matte coating is provided on the surface of the light-proof groove and on the surface between two adjacent light-proof grooves.

[0007] Furthermore, the light-blocking groove extends longitudinally along the axial direction of the light guide plate body.

[0008] Furthermore, the groove is disposed on the lower end face of the light guide plate body along the axial direction.

[0009] Furthermore, at least one positioning post protruding along the axial direction is provided on the lower end face of the light guide plate body.

[0010] Furthermore, the lower axial end face of the light guide plate body is provided with a reflective surface, and the light source emitted by the light source passes through the reflective surface to illuminate the light guide plate body.

[0011] Furthermore, the groove is disposed on the upper end face of the light guide plate body in the axial direction.

[0012] Furthermore, there are two grooves, which are symmetrically arranged along the axis of the light guide plate body.

[0013] Furthermore, a reflective film is provided on the upper end face of the light guide plate body at a position corresponding to the groove, and the reflective film is bonded to the light guide plate body by adhesive.

[0014] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: This utility model discloses a light guide plate for automotive logos, comprising a light guide plate body with grooves that mate with a light source. The light guide plate body has a plurality of anti-light-transmitting grooves arranged circumferentially on its radial outer edge surface. Each anti-light-transmitting groove has a semi-circular cross-section, and the grooves are evenly and spaced apart on the radial outer edge surface. When the light source illuminates the arc-shaped surface of the anti-light-transmitting groove, reflection occurs, thereby reducing the amount of light emitted outwards, achieving the effect of preventing light transmission, and ensuring the uniformity of the overall light intensity of the light guide plate. Attached Figure Description

[0015] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a top view of the overall structure of Embodiment 1 of this utility model; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 This is a side view of the overall structure of Embodiment 1 of this utility model; Figure 4 yes Figure 3 Enlarged view of point B in the middle; Figure 5 This is a cross-sectional view of the overall structure of Embodiment 1 of this utility model; Figure 6 This is a bottom view of the overall structure of Embodiment 1 of this utility model; Figure 7 yes Figure 6 Enlarged view of point C in the middle; Figure 8 This is an exploded view of the overall structure of Embodiment 1 of this utility model; Figure 9 This is a cross-sectional view of the overall structure of Embodiment 2 of this utility model.

[0016] The reference numerals in the attached figures are explained as follows: 1. Light guide plate body; 2. Groove; 3. Anti-light groove; 4. Positioning post; 5. Reflective surface; 6. Light guide groove; 7. Reflective film; 8. Adhesive. Detailed Implementation

[0017] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] Example 1 refer to Figure 1 and Figure 5 The light guide plate provided in this example for a car logo includes a light guide plate body 1. The light guide plate body 1 is provided with a groove 2 that cooperates with a light source. In this example, the groove 2 is provided on the lower end face of the light guide plate body 1 along the axial direction. The light source is embedded in the groove 2. There are two grooves 2 and they are symmetrically arranged along the axis of the light guide plate body 1. The symmetrical distribution of the two light sources can balance the light propagation path and make the light emission of the entire logo surface more uniform.

[0021] refer to Figures 1-4The light guide plate body 1 has several anti-light-transmitting grooves 3 arranged circumferentially on its radial outer edge surface. Each anti-light-transmitting groove 3 has a semi-circular cross-section, and the grooves are evenly and spaced apart on the radial outer edge surface of the light guide plate body 1. When the light guide plate is working, the light source is reflected after shining on the arc-shaped surface of the anti-light-transmitting groove 3, thereby reducing the amount of light emitted outward and achieving the function of anti-light transmission, ensuring the uniformity of the overall light intensity of the light guide plate. The anti-light-transmitting grooves 3 extend longitudinally along the axial direction of the light guide plate body 1, which can increase the area of ​​the anti-light-transmitting grooves 3 that reflects the light source and improve the anti-light transmission effect. A matte coating is provided on the surface of the anti-light-transmitting groove 3 and on the surface between two adjacent anti-light-transmitting grooves. The matte coating is a sand coating or is processed by spark discharge machining. The matte coating blocks the emitted light source, ensuring that the emitted light source only exits from the upper surface of the light guide plate body.

[0022] refer to Figure 1 and Figure 2 The light guide plate body 1 has at least one positioning post 4 protruding along the axial direction on its lower end face. There are two positioning posts 4. When this light guide plate body 1 is assembled on the car logo, the positioning posts 4 cooperate with other structures in the car logo (such as circuit boards or housings) to play a positioning role, which facilitates assembly.

[0023] refer to Figure 5 , Figure 6 and Figure 7 A reflective surface 5 is provided on the lower axial end face of the light guide plate body 1. The light emitted by the light source passes through the reflective surface and illuminates the light guide plate body 1. The reflective surface 5 reflects the downward-emitted light source, preventing it from shooting downwards. Several rings of light guide grooves 6 are provided on the lower end face of the light guide plate body 1. The center point of each ring of light guide grooves 6 coincides with the center point of the light guide plate body 1. The density of the rings of light guide grooves 6 gradually increases along the radial direction of the light guide plate body. The light guide grooves 6 can reflect light. Under the action of the light guide grooves 6 and the inherent characteristics of the light guide plate body 1 (such as the good light guiding properties of the light guide material), the light is more evenly distributed on the entire light guide plate body 1, ensuring the overall luminous intensity of the light guide plate body 1. Since the brightness of the area around the groove 2 is relatively high, no light guide grooves 6 are provided in the area around the groove 2 to ensure the overall brightness uniformity of the light guide plate body 1. At the same time, the diameter of the light guide grooves 6 near the area around the groove 2 gradually decreases from the outside to the inside.

[0024] refer to Figure 7 and Figure 8A reflective film 7 is provided on the upper end face of the light guide plate body 1 at the position corresponding to the groove 2. The reflective film 7 is bonded to the light guide plate body 1 by adhesive 8. Since the brightness at the groove 2 is relatively large, the reflective film 7 is provided to cover the corresponding position of the groove 2, thereby reducing the brightness at this position and ensuring the uniformity of the brightness of the entire light guide plate body 1.

[0025] Example 2 The structure of this embodiment is basically the same as that of embodiment 1, except that: refer to Figure 9 The groove 2 is located on the upper end face of the light guide plate body 1 in the axial direction. The light source passes through the reflective surface and illuminates the lower end face of the light guide plate body 1. The light illuminating the light guide plate body 1 is reflected by this groove 2, which also allows the light to be distributed across the entire light guide plate body 1. The groove 2 has an inverted triangular cross-section, and a reflective coating is provided on the outer wall of the groove 2 to improve the reflection effect.

[0026] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A light guide plate for automobile logos, comprising a light guide plate body (1), wherein the light guide plate body (1) is provided with a groove (2) for cooperating with a light source, characterized in that, The light guide plate body (1) has a number of light-proof grooves (3) arranged circumferentially on its radial outer edge surface. The cross-section of each light-proof groove (3) is semi-circular. The number of light-proof grooves (3) are evenly and spaced apart on the radial outer edge surface of the light guide plate body (1).

2. The light guide plate for automobile logos according to claim 1, characterized in that, A matte coating is provided on the surface of the light-proof groove (3) and on the surface between two adjacent light-proof grooves (3).

3. The light guide plate for automobile logos according to claim 1 or 2, characterized in that, The light-proof groove (3) extends longitudinally along the axial direction of the light guide plate body (1).

4. The light guide plate for automobile logos according to claim 3, characterized in that, The groove (2) is disposed on the lower end face of the light guide plate body (1) in the axial direction.

5. The light guide plate for automobile logos according to claim 4, characterized in that, The light guide plate body (1) has at least one positioning post (4) protruding along the axial direction on its lower end face.

6. The light guide plate for automobile logos according to claim 1, characterized in that, The lower axial end face of the light guide plate body (1) is provided with a reflective surface (5), and the light source emitted by the light source passes through the reflective surface (5) and illuminates the light guide plate body (1).

7. The light guide plate for automobile logos according to claim 4, characterized in that, A reflective film (8) is provided on the upper end face of the light guide plate body (1) at a position corresponding to the groove (2). The reflective film (8) is bonded to the light guide plate body (1) by adhesive (9).

8. The light guide plate for automobile logos according to claim 3, characterized in that, The groove (2) is disposed on the upper end face of the light guide plate body (1) in the axial direction.

9. The light guide plate for automobile logos according to claim 4 or 8, characterized in that, The groove (2) is provided in two places and is symmetrically arranged along the axis of the light guide plate body (1).

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