Shading element, light guide assembly and light emitting device

Abstract

The present invention provides a shading element (4) for an optical element to shield light emitted by the optical element, wherein the shading element (4) comprises a rubber material. The present invention also provides a light guide assembly, wherein the light guide assembly comprises: a light guide (5); and a shading element (4), wherein the shading element (4) is coated on at least a portion of the light guide (5). The present invention also provides a light emitting device (100). According to the shading element, the light guide assembly and the light emitting device of the present invention, light leakage is avoided or light leakage is at least partially reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of motor vehicles and lighting devices, and in particular to a shading element, a light guide component comprising the shading element, and a lighting device comprising the light guide component. Background Art

[0002] The lighting device of a motor vehicle includes various lighting and / or signal indicating devices, such as the vehicle's headlights, fog lights, turn lights, brake lights, tail lights, position lights, daytime running lights, etc. The lighting device of a motor vehicle generally includes a light source and a light guide element.

[0003] As a commonly used light-guiding element, light guides are frequently used in the lighting devices of motor vehicles to guide the propagation of light and produce the desired optical shape. Desirably, light is propagated in the light guide in a total reflection manner. However, on the one hand, light leakage is inevitable on the reflective surface of the light guide. On the other hand, the leaked light will propagate through the gaps between the elements of the lighting device and the light-transmitting elements (such as lenses), and then emit out of the lighting device. Therefore, for observers, stray light is easily observed outside the vehicle, which affects the optical shape of the headlights and deteriorates the aesthetics. In addition, the stray light interferes with the optical signal generated by the lighting device, affecting the judgment of the signal.

[0004] In particular, when the structure of the light incident surface of the light guide is complex, this light leakage is more obvious. When the light guide is used in combination with a light guide reflector, in order to reduce the light leakage out of the light emitting device, a possible solution is to provide protruding ribs or ribs on the light guide reflector and position them on the path where the leaked light may propagate to block the exposure of the light. However, this increases the difficulty of molding the light guide reflector and increases the manufacturing and assembly costs. Summary of the invention

[0005] The object of the present invention is to at least partially overcome the defects of the prior art and to provide a shading element, a light guide component including the shading element and a light emitting device including the light guide component.

[0006] Another object of the present invention is to provide a light shielding element that avoids light leakage or at least partially reduces light leakage.

[0007] Another object of the present invention is to provide a shading element which has low manufacturing cost and is easy to install.

[0008] Another object of the present invention is to provide a lighting device with better aesthetics and optical effects.

[0009] Another object of the present invention is to provide a lighting device which has low overall manufacturing cost and is easy to assemble.

[0010] To achieve the above purpose or one of the purposes, the technical solution of the present invention is as follows:

[0011] A shading element is used for an optical element to shield light emitted by the optical element. The shading element comprises a rubber material.

[0012] According to a preferred embodiment of the present invention, the shading element comprises a notch, and the notch penetrates the shading element along an extension direction of the shading element.

[0013] According to a preferred embodiment of the present invention, the shading element includes a straight line segment and a curved line segment.

[0014] According to a preferred embodiment of the present invention, the shading element comprises an extension section and at least one bell-mouth portion, and the at least one bell-mouth portion is located at at least one end of the extension section.

[0015] According to a preferred embodiment of the present invention, the shading element comprises two bell-mouth portions, and the two bell-mouth portions are respectively located at two ends of the extension section.

[0016] According to a preferred embodiment of the present invention, the bell mouth portion includes a first opening having a first equivalent diameter and a second opening having a second equivalent diameter, the first opening is opposite to the second opening, and the first equivalent diameter is smaller than the second equivalent diameter.

[0017] According to a preferred embodiment of the present invention, the equivalent diameter of a portion of the bell-mouth portion located between the first opening and the second opening gradually transitions from a first equivalent diameter to a second equivalent diameter.

[0018] According to a preferred embodiment of the present invention, the shading element includes more than two bell-mouth portions, one of which is connected to one end of the extension section, and at least one bell-mouth portion is connected to the outer periphery of the extension section.

[0019] According to a preferred embodiment of the present invention, the two or more flared portions are spaced apart along the extending direction of the shading element.

[0020] According to a preferred embodiment of the present invention, the shading element comprises one or more ribs.

[0021] According to a preferred embodiment of the present invention, the ribs are arranged on the inner circumference or the outer circumference of the shading element.

[0022] According to a preferred embodiment of the present invention, the ribs extend along an extension direction of the shading element, or the ribs extend along a circumferential direction of the shading element.

[0023] According to a preferred embodiment of the present invention, the ribs are arranged on the inner circumference of the shading element, and the height of the ribs protruding from the inner circumference varies along the extension direction of the shading element.

[0024] According to a preferred embodiment of the present invention, the shading element is in the shape of a hollow cylinder or a hollow square column.

[0025] According to a preferred embodiment of the present invention, the shading element comprises a base and two side wings, wherein the two side wings are respectively connected to the base and are parallel to each other.

[0026] According to a preferred embodiment of the present invention, the shading element includes a positioning hole or a positioning column.

[0027] According to another aspect of the present invention, there is also provided a light guide assembly, the light guide assembly comprising:

[0028] Light guides; and

[0029] A shading element as described in any one of the above embodiments,

[0030] Wherein, the shading element covers at least a portion of the light guide.

[0031] According to a preferred embodiment of the present invention, the light guide includes a positioning column or a positioning hole cooperating with the shading element.

[0032] According to a preferred embodiment of the present invention, the light guide assembly comprises a fixing element for fixing the shading element on the light guide.

[0033] According to another aspect of the present invention, a light emitting device is provided. The light emitting device comprises the light guide assembly according to any one of the aforementioned embodiments.

[0034] According to a preferred embodiment of the present invention, the light emitting device further comprises:

[0035] case;

[0036] lens; and

[0037] Light source component.

[0038] According to the shading element of the present invention, when used in conjunction with an optical element, for example, when it is sleeved on an optical element, it can effectively block light and prevent light leakage. The shading element of the present invention is made of a rubber material, has good flexibility, is convenient for use with an optical element, is easy to install, and has low cost. By using the shading element of the present invention, the lighting device of a motor vehicle can have better aesthetics and optical effects. Compared to the solution of providing protruding ribs or ribs on a light guide reflector to block light, the light-emitting device of the present application can simplify the molding of the light guide reflector and reduce the molding cost. Therefore, the overall manufacturing cost of the light-emitting device of the present invention is low and it is easy to assemble.

[0039] By providing a notch on the shading element, the shading element can be conveniently sleeved on the optical element (such as a light guide). With the help of the elasticity of the rubber material itself, when installing the shading element, it is only necessary to open the shading element along the notch and clamp it on the optical element. The shading element is clamped and fixed on the optical element by the elastic force of the rubber material, and no additional fixing element is required. In addition, the rubber material has the advantage of being light in weight, thereby reducing the load on the optical element that carries the shading element. In a further embodiment, the shading element is provided with a bell-mouth portion, which is conducive to gathering the light leaked from the optical element, and this design increases the effective shading area of ​​the shading element. There can be multiple bell-mouth portions, which can be arranged on the extension portion in a spaced-apart and stacked manner. On the one hand, the strength of the shading element can be increased, and on the other hand, multiple bell-mouth portions provide a greater clamping force.

[0040] Advantageously, since the ribs are provided on the shading element, the strength of the shading element can be increased, and in particular, when the ribs are provided on the inner circumference of the shading element, the shading element and the optical element are in contact only at the ribs, which can ensure that the total reflection of the light guide is not affected. When the height of the ribs protruding from the inner circumference gradually changes along the extension direction of the shading element, the shading element has different inner diameters along the extension direction, which enables the shading element to produce a certain wedge tightness when combined with the optical element, which is conducive to the tight combination of the shading element and the optical element, and the shading element designed in this way can be applied to optical elements of different sizes, for example, to light guides of different diameters. Depending on the size of the optical element to be shaded, different parts of the shading element can be applied to combine with the light guide. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a perspective view of a light emitting device according to a first embodiment of the present invention;

[0042] Figure 2 The light emitting device according to the first embodiment of the present invention is Figure 1 A cross-sectional view of section AA;

[0043] Figure 3 is an exploded view of a light emitting device according to a first embodiment of the present invention;

[0044] Figure 4a is a three-dimensional diagram of a shading element of a light emitting device according to a first embodiment of the present invention;

[0045] Figure 4b is a top view of a shading element of a light emitting device according to a first embodiment of the present invention;

[0046] Figure 4c The shading element of the light emitting device according to the first embodiment of the present invention is Figure 4b A cross-sectional view of the BB section;

[0047] Figure 5 is a perspective view of a light emitting device according to a second embodiment of the present invention;

[0048] Figure 6 The light emitting device according to the second embodiment of the present invention is Figure 5 A cross-sectional view of section AA;

[0049] Figure 7 is an exploded view of a light emitting device according to a second embodiment of the present invention;

[0050] Figure 8a is a perspective view of a shading element of a light emitting device according to a second embodiment of the present invention;

[0051] Figure 8b is a top view of a shading element of a light emitting device according to a second embodiment of the present invention;

[0052] Figure 8c The shading element of the light emitting device according to the second embodiment of the present invention is Figure 8b A cross-sectional view of the BB section;

[0053] Figure 8d A view of a shading element according to an example of a second embodiment of the present invention;

[0054] Figure 8e A view of a shading element according to an example of a second embodiment of the present invention;

[0055] Figure 8f A view of a shading element according to an example of a second embodiment of the present invention;

[0056] Figure 8g A view of a shading element according to an example of a second embodiment of the present invention;

[0057] Fig. 9 is a perspective view of a light emitting device according to a third embodiment of the present invention;

[0058] Fig.10 The light emitting device according to the third embodiment of the present invention is Fig. 9 A cross-sectional view of section AA;

[0059] Fig.11 is an exploded view of a light emitting device according to a third embodiment of the present invention;

[0060] Fig.12a is a perspective view of a shading element of a light emitting device according to a third embodiment of the present invention;

[0061] Figure 12bis a front view of a shading element of a light emitting device according to a third embodiment of the present invention;

[0062] Fig.12c The shading element of the light emitting device according to the third embodiment of the present invention is Figure 12b A cross-sectional view of the BB section;

[0063] Fig.13a is a perspective view of a light guide assembly according to a fourth embodiment of the present invention, wherein the light guide is removed;

[0064] Fig.13b is a cross-sectional view of a light guide assembly according to a fourth embodiment of the present invention along a cross section perpendicular to an extending direction of a shading element;

[0065] Fig.13c is a cross-sectional view of a light guide assembly according to a fourth embodiment of the present invention along a cross section parallel to an extending direction of a shading element;

[0066] Fig.14a is a perspective view of a light guide assembly according to a fifth embodiment of the present invention, wherein the light guide is removed;

[0067] Fig.14b is a cross-sectional view of a light guide assembly according to a fifth embodiment of the present invention along a cross section perpendicular to an extending direction of a shading element;

[0068] Fig.14c is a cross-sectional view of a light guide assembly according to a fifth embodiment of the present invention along a cross section parallel to an extension direction of a shading element;

[0069] Fig.15a is a perspective view of a light guide assembly according to a sixth embodiment of the present invention, wherein the light guide is removed;

[0070] Fig.15b is a front view of a light guide assembly according to a sixth embodiment of the present invention; and

[0071] Fig.15c 4 is a cross-sectional view of a light guide assembly according to a sixth embodiment of the present invention, taken along a cross section perpendicular to an extending direction of a shading element. DETAILED DESCRIPTION

[0072] Exemplary embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the same reference numerals represent the same elements. In addition, in the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. However, it is apparent that one or more embodiments may also be implemented without these specific details. In other cases, known structures and devices are embodied in a schematic manner to simplify the accompanying drawings.

[0073] First embodiment

[0074] Figure 1-3 FIG. 4 shows a light emitting device according to a first embodiment of the present invention. Figure 1-3 As shown, the light-emitting device 100 generally includes: a shell 1, a carrier 2, a light source assembly 3, a shading element 4, a light guide 5, an inner lens 6, a support plate 7, and an outer lens 8. The shell 1 is used to accommodate necessary elements of the light-emitting device, the carrier 2 is fixed on the shell 1, the light source assembly 3 and the light guide 5 are directly or indirectly fixed on the carrier 2, the light guide 5, the inner lens 6, and the outer lens 8 are sequentially arranged on the propagation path of the light emitted by the light source, and the inner lens 6 is connected and fixed on the support plate 7.

[0075] The light source assembly 3 may, for example, include a light source in the form of a light emitting diode or a halogen lamp, which may be a point light source or a surface light source. The light emitted from the light source assembly 3 is first irradiated onto the light incident surface of the light guide 5, enters the light guide 5 from the light incident surface, and after propagation inside the light guide, is emitted from the light exiting surface of the light guide 5, and then the light is emitted through the inner lens 6 and the outer lens 8.

[0076] In this embodiment, the shading element 4 is used to cooperate with the light guide 5 (optical element) to block the light emitted by the light guide 5. The light guide 5 is constructed to include a generally cylindrical extension portion. The shading element 4 is coated on the outer periphery of the cylindrical extension portion of the light guide 5, wherein the main body of the shading element 4 is made of rubber material and is generally hollow cylindrical. The shading element 4 includes a straight segment 43 and a curved segment 42. The straight segment 43 is located at the lower part, and the curved segment 42 is located at the upper part and connected to the straight segment 43. The length of the curved segment 42 is greater than the length of the straight segment 43. Further, the shading element 4 includes a notch 41. The notch 41 passes through the shading element 4 along the extension direction of the shading element 4, that is, extends from one end of the shading element 4 to the other end, and extends through the straight segment 43 and the curved segment 42, see Figure 4a-4c .

[0077] The shading element according to the embodiment of the present invention, when used in conjunction with a light guide, for example, when put on the light guide, can effectively block light and prevent light leakage. The shading element of the embodiment of the present invention is made of a rubber material, has good flexibility, is convenient for use with a light guide, is easy to install, and has low cost. By using the shading element of the embodiment of the present invention, the light-emitting device of a motor vehicle can be made more aesthetically pleasing and have better optical effects. Compared to the solution of providing protruding ribs or ribs on the light guide reflector to block light, the light-emitting device of the present application can simplify the molding of the light guide reflector and reduce the molding cost. Therefore, the light-emitting device of the embodiment of the present invention has a low overall manufacturing cost and is easy to assemble.

[0078] By providing a notch on the shading element, the shading element can be conveniently placed on the light guide. With the help of the elasticity of the rubber material itself, when installing the shading element, it is only necessary to open the shading element along the notch and clamp it on the light guide. The shading element is clamped and fixed on the light guide by the elastic force of the rubber material, and no additional fixing element is required. In addition, the rubber material has the advantage of being light in weight, thereby reducing the load on the light guide that carries the shading element.

[0079] Second embodiment

[0080] Figure 5-7 FIG. 4 shows a light emitting device according to a second embodiment of the present invention. Figure 5-7 As shown, the light-emitting device 100 generally includes: a shell 1, a carrier 2, a light source assembly 3, a shading element 4, a light guide 5, an inner lens 6, a support plate 7, and an outer lens 8. The shell 1 is used to accommodate necessary elements of the light-emitting device, the carrier 2 is fixed on the shell 1, the light source assembly 3 and the light guide 5 are directly or indirectly fixed on the carrier 2, the light guide 5, the inner lens 6, and the outer lens 8 are sequentially arranged on the propagation path of the light emitted by the light source, and the inner lens 6 is connected and fixed on the support plate 7.

[0081] The light source assembly 3 may, for example, include a light source in the form of a light emitting diode or a halogen lamp, which may be a point light source or a surface light source. The light emitted from the light source assembly 3 is first irradiated onto the light incident surface of the light guide 5, enters the light guide 5 from the light incident surface, and after propagation inside the light guide, is emitted from the light exiting surface of the light guide 5, and then the light is emitted through the inner lens 6 and the outer lens 8.

[0082] In this embodiment, the shading element 4 is used to cooperate with the light guide 5 (optical element) to block the light emitted by the light guide 5. The light guide 5 is constructed to include a substantially cylindrical extension portion. The shading element 4 is wrapped around the periphery of the cylindrical extension portion of the light guide 5. The main body of the shading element 4 is made of rubber material and is substantially trumpet-shaped. The shading element 4 includes an extension section 44 and a trumpet-mouth portion 45. The trumpet-mouth portion 45 is located at one end of the extension section 44. Figure 8a As shown, the bell mouth portion 45 is located at the lower part, and the extension section 44 is located at the upper part and connected to the bell mouth portion 45. Further, the shading element 4 includes a notch 41, and the notch 41 passes through the shading element 4 along the extension direction of the shading element 4, that is, extends from one end of the shading element 4 to the other end, extending through the extension section 44 and the bell mouth portion 45, see Figure 8a-8c .

[0083] The bell mouth portion 45 includes a first opening 451 having a first equivalent diameter and a second opening 452 having a second equivalent diameter. The first opening 451 is opposite to the second opening 452, and the first equivalent diameter is smaller than the second equivalent diameter. The equivalent diameter of the portion of the bell mouth portion 45 located between the first opening and the second opening gradually transitions from the first equivalent diameter to the second equivalent diameter. Figure 8a-8c As shown, the first opening and the second opening are circular, respectively, and the diameter of the first opening is smaller than the diameter of the second opening. In an alternative embodiment, the first opening and the second opening may be in a square shape, in which case the side length of the first opening is smaller than the side length of the second opening. It should be noted that the bell mouth portion includes an object with a truncated cone cross section, as long as there is an opening in the middle. The opening angle of the bell mouth portion may be 100-140 degrees, preferably 120 degrees.

[0084] The shading element according to the embodiment of the present invention, when used in conjunction with a light guide, for example, when put on the light guide, can effectively block light and prevent light leakage. The shading element of the embodiment of the present invention is made of a rubber material, has good flexibility, is convenient for use with a light guide, is easy to install, and has low cost. By using the shading element of the embodiment of the present invention, the light-emitting device of a motor vehicle can be made more aesthetically pleasing and have better optical effects. Compared to the solution of providing protruding ribs or ribs on the light guide reflector to block light, the light-emitting device of the present application can simplify the molding of the light guide reflector and reduce the molding cost. Therefore, the light-emitting device of the embodiment of the present invention has a low overall manufacturing cost and is easy to assemble.

[0085] By providing a notch on the shading element, the shading element can be conveniently placed on the light guide. With the help of the elasticity of the rubber material itself, when installing the shading element, it is only necessary to open the shading element along the notch and clamp it on the light guide. The shading element is clamped and fixed on the light guide by the elastic force of the rubber material, and no additional fixing element is required. In addition, the rubber material has the advantage of being light in weight, thereby reducing the load on the light guide that carries the shading element.

[0086] In this embodiment, the shading element is provided with a trumpet-mouth portion, which is conducive to gathering the light leaked from the light guide, and this design increases the effective shading area of ​​the shading element.

[0087] Furthermore, there may be multiple bell-mouth portions, which may be spaced apart and stacked on the extension portion, which may increase the strength of the shading element on the one hand, and provide a greater clamping force on the other hand. For example, the shading element 4 includes two bell-mouth portions 45, which are respectively located at the two ends of the extension section 44, or the shading element 4 includes more than two bell-mouth portions 45, one of which is connected to one end of the extension section 44, and at least one bell-mouth portion 45 is connected to the outer periphery of the extension section 44. Furthermore, the more than two bell-mouth portions 45 are spaced apart along the extension direction of the shading element 4, see Figure 8d .

[0088] According to a further preferred embodiment of the present invention, the shading element 4 includes one or more ribs 441, and the ribs 441 can be arranged on the inner circumference or the outer circumference of the shading element 4 (see Figure 8e Advantageously, the ribs extend along the extension direction of the shading element 4, that is, substantially parallel to the notches 41 of the shading element 4, or the ribs extend along the circumference of the shading element 4.

[0089] Further preferably, the ribs are arranged on the inner circumference of the shading element 4 , and the height of the ribs protruding from the inner circumference varies along the extension direction of the shading element 4 .

[0090] Advantageously, since the ribs are provided on the shading element, the strength of the shading element can be increased, and in particular, when the ribs are provided on the inner circumference of the shading element, the shading element and the light guide are in contact only at the ribs, which can ensure that the total reflection of the light guide is not affected. When the height of the ribs protruding from the inner circumference gradually changes along the extension direction of the shading element, the shading element has different inner diameters along the extension direction, which enables the shading element to produce a certain wedge tightness when combined with the light guide, which is conducive to the tight combination of the shading element and the light guide, and the shading element designed in this way can be applied to light guides of different sizes, for example, light guides of different diameters. Depending on the size of the light guide to be shaded, different parts of the shading element can be applied to combine with the light guide.

[0091] As a further improvement to this embodiment, the shading element 4 may include a snap ring 442, which may be made of metal and is disposed at one end of the extension section 44 of the shading element 4. Figure 8f When the shading element 4 is covered on the light guide 5, the shading element 4 can be fixed by clamping the clamp ring to prevent the shading element from falling off or vibrating after the rubber material may age.

[0092] The shading element 4 may also include an adhesive layer 49, which is located at the inner periphery of the shading element. Figure 8g In this way, the shading element 4 can be fixed firmly on the light guide 5 by itself.

[0093] The shading element 4 can be manufactured by an extrusion molding process to form a soft rubber sleeve, and in the extrusion molding process, a colorant can be added to the raw material to make the shading element 4 form a desired color to match the color of the surrounding elements to prevent the element from being observed from outside the vehicle so that the element can adapt to the surroundings.

[0094] To improve versatility, the shading element 4 of the present invention can be made into standard parts of different sizes. For example, shading elements 4 of different lengths and diameters can be made according to the size of the light guide and defined as standard parts, thereby providing a wider range of applications.

[0095] Third embodiment

[0096] The above shows an embodiment in which the shading element 4 is in a hollow cylindrical shape. In conjunction with the description of the third embodiment, the shading element 4 may also have other shapes, such as a hollow square column.

[0097] Figure 9-11 FIG. 4 shows a light emitting device according to a third embodiment of the present invention. Figure 9-11 As shown, the light emitting device 100 generally comprises: a housing 1, a shading element 4, a light guide 5, an inner lens 6, a printed circuit board 9 and a light blocking member 10. The housing 1 is used to accommodate the necessary elements of the light emitting device. The shading element 4, the light guide 5, the inner lens 6, the printed circuit board 9 and the light blocking member 10 are directly or indirectly fixed to the housing 1. Here, the light guide 5 is constructed as a flat light guide, the printed circuit board 9 and the light emitting diode fixed thereon are located above the light guide 5, and the light blocking member 10 is in a plate shape and is located below the light guide 5, as shown in FIG. Fig.10 As shown, the upper surface of the light guide 5 serves as the light incident surface, the light blocking member 10 located below is used to block the light emitted on the lower surface of the light guide 5, the side surface of the light guide 5 serves as the light emitting surface, and the shading element 4 is covered on one side of the light guide 5 to prevent light leakage on this side of the light guide 5.

[0098] The light emitted from the light emitting diode is first irradiated on the light incident surface of the light guide 5 , enters the light guide 5 from the light incident surface, and after propagation inside the light guide, is emitted from the light emitting surface of the light guide 5 , and then the light is emitted through the inner lens 6 .

[0099] In this embodiment, the shading element 4 is used to cooperate with the light guide 5 (optical element) to block the light emitted by the light guide 5. The light guide 5 is constructed as a flat light guide. The shading element 4 is wrapped around one side of the flat light guide. The main body of the shading element 4 is made of rubber material and is roughly in the shape of a hollow square column, but three faces are open. The shading element 4 includes a base 47 and two side wings 46. The two side wings 46 are respectively connected to the base 47 and are parallel to each other. Figure 12a-12cAs shown. Since the shading element 4 has an open surface, the shading element 4 does not need to be provided with a notch. Instead, the two side wings 46 of the shading element 4 are inclined toward the hollow interior of the square column to generate a greater clamping force to clamp the light guide 5.

[0100] Fourth embodiment

[0101] Figures 13a-13c The light guide assembly according to the fourth embodiment of the present invention is shown in FIG. Fig.13a As shown in the figure, the light guide assembly includes: a light guide 5; and a shading element 4. The light guide 5 and the shading element 4 are configured to be curved and have a substantially circular cross-section, and the shading element 4 has a notch 41, and the shading element 4 covers at least a portion of the light guide 5.

[0102] In this embodiment, the light guide 5 includes a positioning column 51 that cooperates with the shading element 4, and accordingly, the shading element 4 includes a positioning hole 48. Alternatively, the light guide 5 may include a positioning hole that cooperates with the shading element 4, and accordingly, the shading element 4 may include a positioning column. The number of the positioning column and the positioning hole can be multiple, respectively. Preferably, the positioning column or the positioning hole 48 of the shading element 4 is located on the side opposite to the notch 41.

[0103] By providing the positioning element, it is possible to prevent the shading element 4 and the light guide 5 from relative movement, including movement of the shading element along the axial direction of the light guide and rotation of the shading element relative to the light guide.

[0104] Further, the light guide assembly may include a fixing element for fixing the shading element 4 on the light guide 5, for example, the shading element 4 is fixed on the light guide 5 by glue 11. Alternatively, the light guide assembly may include a buckle to fix the shading element 4 on the light guide 5.

[0105] Fifth embodiment

[0106] Figures 14a-14c The fifth embodiment of the light guide assembly according to the present invention is shown in FIG. Fig.14a In the figure, the light guide is removed. As shown in the figure, the light guide assembly includes: a light guide 5; and a shading element 4. The light guide 5 is configured to be curved and has a substantially circular cross section, and the shading element 4 includes an extension section 44 and a flared portion 45, and the shading element 4 has a notch 41, and the extension section 44 of the shading element 4 covers at least a portion of the light guide 5.

[0107] In this embodiment, the light guide 5 includes a positioning column 51 that cooperates with the shading element 4, and accordingly, the shading element 4 includes a positioning hole 48. Alternatively, the light guide 5 may include a positioning hole that cooperates with the shading element 4, and accordingly, the shading element 4 may include a positioning column. The number of the positioning column and the positioning hole can be multiple, respectively. Preferably, the positioning column or the positioning hole 48 of the shading element 4 is located on the side opposite to the notch 41.

[0108] By providing the positioning element, it is possible to prevent the shading element 4 and the light guide 5 from relative movement, including movement of the shading element along the axial direction of the light guide and rotation of the shading element relative to the light guide.

[0109] Further, the light guide assembly may include a fixing element for fixing the shading element 4 on the light guide 5, for example, the shading element 4 is fixed on the light guide 5 by glue 11. Alternatively, the light guide assembly may include a buckle to fix the shading element 4 on the light guide 5.

[0110] Sixth embodiment

[0111] Figure 15a-15c The light guide assembly according to the sixth embodiment of the present invention is shown in FIG. Fig.15a In the figure, the light guide is removed. As shown in the figure, the light guide assembly includes: a light guide 5; and a shading element 4. The light guide 5 is constructed as a flat light guide, and the shading element 4 is roughly in the shape of a hollow square column, but three faces are open, including a base 47 and two side wings 46, the two side wings 46 are respectively connected to the base 47 and are parallel to each other, and the shading element 4 is wrapped on one side of the light guide 5.

[0112] Further, the light guide assembly may include a fixing element for fixing the shading element 4 to the light guide 5, for example, the shading element 4 is fixed to the light guide 5 by glue. Alternatively, the light guide assembly may include a buckle to fix the shading element 4 to the light guide 5.

[0113] Although the present invention is described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to exemplify the preferred embodiments of the present invention and should not be construed as limiting the present invention. The size ratios in the drawings are merely illustrative and should not be construed as limiting the present invention.

[0114] Although some embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept, the scope of which is defined by the claims and their equivalents.

[0115] List of reference numerals:

[0116] 100 Lighting Device

[0117] 1 Housing

[0118] 2 Bearings

[0119] 3 Light source components

[0120] 4 Shading elements

[0121] 5 Light guide

[0122] 6 Inner lens

[0123] 7 Support plate

[0124] 8 External lens

[0125] 9. Printed Circuit Board

[0126] 10 Light blocking

[0127] 11 Glue

[0128] 41 Notch

[0129] 42 Curve Segment

[0130] 43 straight line segment

[0131] 44 Extension

[0132] 441 Ribs

[0133] 442 Snap ring

[0134] 45 Bell mouth

[0135] 451 First Opening

[0136] 452 Second Opening

[0137] 46 Wing

[0138] 47 Base

[0139] 49 Adhesive layer

[0140] 48 Positioning holes

[0141] 51 Positioning column.

Claims

1. A shading element (4), arranged to cover at least a portion of a light guide (5) to shield light emitted by the light guide (5), characterized in that: The shading element (4) comprises a rubber material, and includes an extension section (44) and two or more bell-mouth sections (45), wherein one bell-mouth section (45) is connected to one end of the extension section (44), and at least one bell-mouth section (45) is connected to the outer periphery of the extension section (44).

2. The shading element (4) according to claim 1, characterized in that: The shading element (4) comprises a notch (41), and the notch (41) penetrates the shading element (4) along an extension direction of the shading element (4).

3. The shading element (4) according to claim 1, characterized in that: The shading element (4) comprises a straight line segment (43) and a curved line segment (42).

4. The shading element (4) according to claim 1, characterized in that: The shading element (4) comprises two bell-mouth portions (45), and the two bell-mouth portions (45) are respectively located at two ends of the extension section (44).

5. The shading element (4) according to claim 1, characterized in that: The bell mouth portion (45) comprises a first opening (451) having a first equivalent diameter and a second opening (452) having a second equivalent diameter, the first opening being opposite to the second opening, and the first equivalent diameter being smaller than the second equivalent diameter.

6. The shading element (4) according to claim 5, characterized in that: The equivalent diameter of a portion of the bell mouth portion (45) located between the first opening (451) and the second opening (452) gradually transitions from a first equivalent diameter to a second equivalent diameter.

7. The shading element (4) according to claim 1, characterized in that: The two or more bell-mouth portions (45) are spaced apart along the extension direction of the shading element (4).

8. The shading element (4) according to claim 1, characterized in that: The shading element (4) comprises one or more ribs (441).

9. The shading element (4) according to claim 8, characterized in that: The ribs (441) are arranged on the inner circumference or the outer circumference of the shading element (4).

10. The shading element (4) according to claim 8, characterized in that: The ribs (441) extend along the extension direction of the shading element (4), or the ribs extend along the circumferential direction of the shading element (4).

11. The shading element (4) according to claim 8, characterized in that: The ribs are arranged on the inner circumference of the shading element (4), and the height of the ribs protruding from the inner circumference varies along the extension direction of the shading element (4).

12. The shading element (4) according to claim 1, characterized in that: The shading element (4) is in the shape of a hollow cylinder or a hollow square column.

13. The shading element (4) according to claim 1, characterized in that: The shading element (4) comprises a base (47) and two side wings (46), wherein the two side wings (46) are respectively connected to the base (47) and are parallel to each other.

14. The shading element (4) according to claim 1, characterized in that: The shading element (4) comprises a positioning hole (48) or a positioning column.

15. A light guide assembly, characterized in that: The light guide assembly comprises: a light guide (5); and The shading element (4) according to any one of claims 1 to 14, Wherein, the shading element (4) covers at least a portion of the light guide (5).

16. The light guide assembly according to claim 15, characterized in that: The light guide (5) comprises a positioning column (51) or a positioning hole that cooperates with the shading element (4).

17. The light guide assembly according to claim 15, characterized in that: The light guide assembly comprises a fixing element for fixing the shading element (4) on the light guide (5).

18. A light emitting device (100), characterized in that: The lighting device (100) comprises a light guide assembly according to any one of claims 15 to 17.

19. The lighting device (100) according to claim 18, characterized in that: The light emitting device (100) further comprises: Housing (1); lens; and Light source assembly (3).

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