Light guide structure for automobile atmosphere lamp

Abstract

The utility model belongs to the technical field of illumination, and particularly relates to a light guide structure for an automobile atmosphere lamp. According to the light guide structure for the automobile atmosphere lamp, the protruding block, the connecting rod and the toothed light guide rod unit are arranged on the light guide rod, so that the light guide structure is installed in an automobile body through the protruding block, light rays of a light source are reflected out through the toothed reflection groove, the light rays passing through the toothed reflection groove deflect leftwards in multiple directions, and the light rays are reflected out through the toothed light guide rod unit. The toothed light guide rod unit corrects light which deflects leftwards in a refraction mode, so that the intensity difference of the light is neutralized, the light directivity problem is effectively weakened, meanwhile, the connecting rod supports and connects the light guide rod and the toothed light guide rod unit, and the integrity and strength of the light guide structure are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of lighting, and in particular relates to a light guide structure for an automobile atmosphere lamp. Background Art

[0002] Car ambient light is a kind of interior light used inside the car to enhance the atmosphere of the car environment. It usually appears in the car's steering wheel, center console, footlights, cup holders, roof, welcome lights, welcome pedals, doors, trunk, headlights and other locations.

[0003] Ambient lighting in cars generally consists of several components: a lamp head, a light guide strip, connectors, and a light strip bracket. Multi-color controlled ambient lighting also includes a controller. The light guide is a structural component that directs LED light from the PCB to the front panel or lighting fixture. This component is typically made of PC or PMMA, which offer excellent light-guiding properties.

[0004] Existing automotive ambient lights include three types: bare light guide, light guide + transparent lampshade + leather texture solution, and light guide + diffused lampshade. However, the bare light guide solution has a directionality problem, that is, the brightness perception is different when observed from different angles, and the brightness difference is large; although the light guide + transparent lampshade + leather texture solution can weaken the directionality problem to a certain extent, the additional transparent lampshade has a complex structure, occupies a large space and is relatively expensive; the light guide + diffused lampshade can also effectively weaken the directionality problem, but the overall brightness is greatly reduced as the lampshade is added.

[0005] For example, the Chinese utility model patent with patent publication number CN218721043U and publication date 2023.03.24 discloses an ultra-long ambient light guide structure, which includes two light sources and light guide belts, an anti-light transmission layer, and both light guide belts are fixed on a light guide positioning bracket.

[0006] The general structural principle of the extra-long ambient light guide structure in this utility model patent is as follows: one end of the two light guide belts is connected to the light source and the other end is provided with an anti-light transmission layer, and light is transmitted through optical reflective teeth. The two light guide belts are arranged at intervals on the light guide positioning bracket, and expansion space is reserved for the light guide belts when they expand and contract due to heat and cold, so as to avoid breakage or deformation of the light guide belts.

[0007] However, the super-long ambient light guide structure still has at least the following deficiencies during actual use, which are, in other words, the technical problems to be solved by the present invention.

[0008] Its light-guiding structure emits light only through the reflection of optical reflective teeth, and the large difference in light intensity leads to poor lighting effect.

[0009] Therefore, in summary, there is an urgent need for a bare light guide structure that can weaken the brightness difference. Utility Model Content

[0010] The present utility model provides a light guide structure for an automotive atmosphere lamp. By arranging a protruding block, a connecting rod, and a toothed light guide rod unit on the light guide rod, the following effects can be achieved: the light guide structure is installed in the vehicle body through the protruding block, the light from the light source is reflected by the toothed reflection groove to emit light, most of the light passing through the toothed reflection groove deflects to the left, and the toothed light guide rod unit corrects the light deflecting to the left through refraction, thereby neutralizing the difference in light intensity and effectively weakening the problem of light directivity. At the same time, the connecting rod supports and connects the light guide rod and the toothed light guide rod unit to ensure the integrity and strength of the light guide structure.

[0011] The technical solution adopted by the present utility model to solve the above problems is: a light guide structure for an automotive atmosphere lamp, including a light guide rod, and a toothed reflection groove provided on the light guide rod, further including a protruding block provided on the light guide rod and used for connecting the vehicle body, a connecting rod provided on the light guide rod, and a toothed light guide rod unit provided on all the connecting rods and used for refracting light.

[0012] A further preferred technical solution lies in that: the toothed light guide rod unit includes a main body rod, and protruding teeth provided on the main body rod.

[0013] A further preferred technical solution lies in that: the toothed light guide rod unit further includes a protective light-transmitting plate provided at the lower end of the main body rod and used for protecting the main body rod.

[0014] A further preferred technical solution lies in that: the toothed light guide rod unit further includes a frosted layer provided on the main body rod and used for reducing the light transmittance at the connecting rod.

[0015] A further preferred technical solution lies in that: one end of the light guide rod is provided with a light source interface for connecting a light source.

[0016] A further preferred technical solution lies in that: the shape of the toothed reflection groove is an arc groove, and the cross-sectional shape of the arc groove is a triangle with a central angle of 60° - 90°.

[0017] A further preferred technical solution lies in that: the shape of the protruding teeth is a triangle.

[0018] [[ID=2,6]]A further preferred technical solution lies in that: the connecting rod is arranged between two adjacent sections of the protruding teeth, or at both ends of all the protruding teeth.

[0019] A further preferred technical solution lies in that: the toothed reflection groove is arranged above the protruding block and the connecting rod.

[0020] A further preferred technical solution lies in that: a light-shielding layer is provided on the light-receiving surface of the toothed reflection groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the positional structure diagram of the present utility model.

[0022] Figure 2 This is the partial structure schematic diagram of the present utility model.

[0023] Figure 3 This is the partial enlarged view of A in the present utility model.

[0024] Figure 4 This is the partial enlarged view of B in the present utility model

[0025] Figure 5 This is the optical path schematic diagram in the present utility model.

[0026] Figure 6 This is the positional cross-sectional view of the toothed reflection groove in the present utility model.

[0027] In the figure, the meanings of the respective marks are as follows:

[0028] The dashed line represents the optical path;

[0029] Automobile body a, light source b;

[0030] Optical fiber rod 11, toothed reflection groove 12;

[0031] Protruding block 1, connecting rod 2, toothed optical fiber rod unit 3, light source interface 4, light-shielding layer 5;

[0032] Main body rod 301, protruding teeth 302, protective light-transmitting plate 303, frosted layer 304. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following is only a preferred embodiment of the present utility model, and does not limit the scope of the present utility model.

[0034] As shown Figure 1-6 in the attached drawings, an optical fiber structure for an automobile atmosphere lamp includes an optical fiber rod 11, and a toothed reflection groove 12 provided on the optical fiber rod 11. It further includes a protruding block 1 provided on the optical fiber rod 11 and used for connecting the automobile body a, a connecting rod 2 provided on the optical fiber rod 11, and a toothed optical fiber rod unit 3 provided on all the connecting rods 2 and used for refracting light.

[0035] In this embodiment, the light guide structure is an integral structure, and the material is transparent PMMA or transparent PC material. One end of the light guide rod 11 is connected to the light source b, so that the light of the light source is guided through the light guide rod 11. The light guide rod 11 is divided into a light-emitting surface and a backlight surface. The light-emitting surface is used for light emission and light transmission, and the backlight surface is used for reflecting light. The backlight surface is attached to the vehicle body a, and the toothed reflection grooves 12 are arranged at intervals on the backlight surface. The toothed reflection grooves 12 are used to reflect the light in the light guide rod 11, and the light is emitted from the light-emitting surface after being reflected by the toothed reflection grooves 12.

[0036] In addition, the protruding block 1 is arranged on the light guide rod 11 and is used to engage with the vehicle body a. A notch for engaging with the protruding block 1 is reserved on the vehicle body a. During installation, only need to press the light guide structure into the vehicle body a. Since the protruding block 1 has a certain flexibility, there will be a "click" sound to indicate that the installation is in place after it is snapped into the vehicle body a. Similarly, setting a groove on the light guide rod 11 and arranging the protruding block 1 in the vehicle body a can also achieve this installation purpose.

[0037] In addition, the toothed light guide rod unit 3 serves as the light-emitting part of the light guide structure. After the light is reflected by the toothed reflection grooves 12, most of the light is inclined to the left, which results in poor effects of light intensity and viewing angle in actual use. After the reflected light passes through the toothed light guide rod unit 3, a certain degree of light correction is carried out by means of refraction, so that the light deflected to the left is as close as possible to being perpendicular to the light-emitting surface, thereby effectively weakening the directivity problem and intensity difference of the light during the reflection process. The light emitted by the light source b passes through the light guide rod 11, the toothed reflection grooves 12, air, the toothed light guide rod unit 3, and air in this process.

[0038] Finally, the function of the connecting rod 2 is to connect and fix the spaced light guide rods 11 and the toothed light guide rod units 3. To ensure that the light passes through two propagation modes of reflection and refraction, the toothed light guide rod units 3 need to be arranged at intervals from the light guide rods 11, so that the media through which the light passes are different, achieving flexible use of the toothed light guide rod units 3 for light correction under the integral light guide structure, which is not only convenient for production but also ensures the structural strength.

[0039] The toothed light guide rod unit 3 includes a main body rod 301 and protruding teeth 302 arranged on the main body rod 301.

[0040] In this embodiment, the main body rod 301 has light transmissibility. The protruding teeth 302 are arranged on the upper surface of the main body rod 301, with a serrated shape and a polarizing pattern on the surface. The protruding teeth 302 are divided into left teeth and right teeth. Since the reflected light is mainly polarized to the left, the left teeth are the main refracting surfaces, and the right teeth are mainly for support. To enhance the correction effect, the left teeth should be longer than the right teeth at the front view angle, so that the correction efficiency on the left side is greater.

[0041] The toothed light guide rod unit 3 further includes a protective light-transmitting plate 303 arranged on the lower end of the main body rod 301 and used to protect the main body rod 301.

[0042] In this embodiment, the protective light-transmitting plate 303 is made of a light-transmitting material, and its function is to protect the main body rod 301 and prevent the main body rod 301 from being damaged by external friction. At the same time, the protective light-transmitting plate 303 can prevent the temperature inside the main body rod 301 from being too high to a certain extent.

[0043] The toothed light guide rod unit 3 further includes a frosted layer 304 arranged on the main body rod 301 and used to reduce the light transmittance at the connecting rod 2.

[0044] In this embodiment, since the material of the connecting rod 2 is the same as that of the light guide rod 11 and the toothed light guide rod unit 3, some light rays are not neutralized and corrected after passing through the connecting rod 2, resulting in overly bright light at the position of the connecting rod 2 and generating local large bright spots, which affects the light effect and the user experience. Therefore, the frosted layer 304 is provided to weaken the bright spots. The frosted layer 304 can be replaced by a light-transmitting film to reduce the brightness. The frosted layer 304 at the connecting rod 2 can be provided separately, or the frosted layer 304 can be provided on the light-emitting surface of the entire main body rod 301, and the frosted layer 304 at the connecting rod 2 can be thickened, so that the light of the main body rod 301 is softer and more uniform, and it is also possible to prevent observing the internal structure through the main body rod 301, increasing the aesthetics and opacity of the structure.

[0045] One end of the light guide rod 11 is provided with a light source interface 4 for connecting to the light source b.

[0046] In this embodiment, the light source interface 4 is used to connect the light guide rod 11 to the light source b, reducing the light spillage of the light source b and ensuring the connection stability.

[0047] The shape of the toothed reflection groove 12 is an arc groove, and the cross-sectional shape of the arc groove is a triangle with a central angle of 60°-90°.

[0048] In this embodiment, the toothed reflection groove 12 serves as the light-transmitting structure of the light guide rod 11 and needs to reflect light. Therefore, its cross-sectional shape is triangular, and the central angle is preferably 60°-90°. To ensure the reflection effect, the farther away from the light source b, the deeper the engraving depth of the toothed reflection groove 12.

[0049] The shape of the protruding tooth 302 is triangular.

[0050] In this embodiment, the protruding tooth 302 is triangular. To enhance the light correction effect, the included angle on the left side of the triangle is less than or equal to the included angle on the right side, so that more light is refracted on the left side.

[0051] The connecting rod 2 is arranged between two adjacent segments of the protruding teeth 302, or at both ends of all the protruding teeth 302.

[0052] In this embodiment, to ensure the overall structural strength, the connecting rods 2 need to be arranged at intervals, and the thicknesses of the connecting rods 2 at both ends need to be increased. The thicknesses of the connecting rods 2 at both ends are the same as that of the light guide, with a width of 1 mm - 3 mm and a thickness of 1 mm - 2 mm. The best interval distance is 25 mm - 50 mm. The size of a single connecting rod 2 should not be too large, as this will cause light to be transmitted and emitted through the connecting rod 2, forming a large local bright spot.

[0053] The toothed reflection groove 12 is arranged above the protruding block 1 and the connecting rod 2.

[0054] In this embodiment, the toothed reflection groove 12 is used to reflect the light in the connecting rod 2, so that the light exits from the toothed light guide rod unit 3. To reduce the bright spot, there is no toothed reflection groove 12 in the back area of the light guide rod 11 connected by the connecting rods 2 at both ends.

[0055] A light-shielding layer 5 is provided on the light-facing surface of the toothed reflection groove 12.

[0056] In this embodiment, the light-shielding layer 5 is used to enhance the reflection effect, and the light-shielding layer 5 can achieve the reflection effect by means of polishing or adding patterns, etc.

[0057] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various modifications can be made without departing from the purpose of the present invention. These are all non-creative modifications and are protected by the Patent Law as long as they are within the scope of the claims of the present invention.

Claims

1. A light guide structure for an automotive atmosphere lamp, comprising a light guide rod (11) and a toothed reflection groove (12) provided on the light guide rod (11), characterized in that: It further includes a protruding block (1) disposed on the light guide rod (11) and used for connecting the vehicle body (a), a connecting rod (2) disposed on the light guide rod (11), and a toothed light guide rod unit (3) disposed on all the connecting rods (2) and used for refracting light.

2. The optical waveguide structure for an automotive ambient light according to claim 1, characterized in that: The toothed light guide rod unit (3) includes a main body rod (301) and protruding teeth (302) disposed on the main body rod (301).

3. The optical waveguide structure for an automotive ambient light according to claim 2, characterized in that: The toothed light guide rod unit (3) further includes a protective light-transmitting plate (303) disposed at the lower end of the main body rod (301) and used for protecting the main body rod (301).

4. The optical waveguide structure for an automotive ambient light according to claim 2, characterized in that: The toothed light guide rod unit (3) further includes a frosted layer (304) disposed on the main body rod (301) and used for reducing the light transmittance at the connecting rod (2).

5. The optical waveguide structure for an automotive ambient light according to claim 1, characterized in that: One end of the light guide rod (11) is provided with a light source interface (4) for connecting a light source (b).

6. The optical waveguide structure for an automotive ambient light according to claim 1, characterized in that: The shape of the toothed reflection groove (12) is an arc groove, and the cross-sectional shape of the arc groove is a triangle with a central angle of 60°-90°.

7. The optical waveguide structure for an automotive ambient light according to claim 2, characterized in that: The shape of the protruding teeth (302) is a triangle.

8. The optical waveguide structure for an automotive ambient light according to claim 2, wherein: The connecting rod (2) is disposed between two adjacent protruding teeth (302) or at both ends of all the protruding teeth (302).

9. The optical waveguide structure for an automotive ambient light according to claim 1, characterized in that: The toothed reflection groove (12) is disposed above the protruding block (1) and the connecting rod (2).

10. The optical waveguide structure for an automotive ambient light according to claim 1, characterized in that: A light-shielding layer (5) is provided on the light-facing surface of the toothed reflection groove (12).

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