Light channeling prevention structure of automobile rear combination lamp

Abstract

The utility model discloses a light channeling prevention structure of an automobile rear combination lamp, a PCBA divides a light-emitting assembly installation cavity into a first cavity and a second cavity, and a light leakage prevention support is arranged between a second light guide and a third light guide in a shielding mode and arranged between second LEDs and third LEDs in a shielding mode. By the adoption of the light channeling prevention structure of the automobile rear combination lamp, the first light guide, the second light guide and the third light guide are physically separated independently through the PCBA and the light leakage prevention support, so that the problem of light channeling between the adjacent light guides is effectively solved, and the visual effects of various lamp effects achieved by the automobile rear combination lamp are effectively improved; meanwhile, according to the automobile rear combination lamp, the function of sending light to the first light guide, the second light guide and the third light guide is achieved only through one PCBA, production cost is effectively reduced, no wiring harness exists in the lamp, automatic production is easy to achieve, and production efficiency and stability of product quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle lamps, in particular to a light-channeling prevention structure of a rear combination lamp of an automobile. Background Art

[0002] The rear combination lights of automobiles are generally used mainly as signal lights to inform the rear driver of the position, steering, braking, reversing and other related driving information of the vehicle in front.

[0003] Please refer to the Chinese utility model patent with announcement number CN219177535U. Since the rear combination lamp of an automobile integrates multiple functions such as turn signals, reversing lights, fog lights, etc., it is necessary to configure multiple light guides to realize different functions. However, since there is no physical anti-light-crossing structure between adjacent light guides, light-crossing problems of varying severity exist, making the visual effects of various lighting effects less than ideal.

[0004] Solving the above problems has become a top priority. Utility Model Content

[0005] In order to solve the technical problem of light crosstalk between adjacent light guides of the existing automobile rear combination lamp, the utility model provides an anti-light crosstalk structure for the automobile rear combination lamp.

[0006] The technical solution is as follows:

[0007] A first aspect of the present application relates to an anti-light leakage structure for a rear combination lamp of an automobile, comprising a rear cover and a mask covering the rear cover, a main bracket being installed in a space enclosed by the rear cover and the mask, the main bracket and the rear cover being enclosed to form a light-emitting component installation cavity, an anti-light leakage bracket, a first light guide, a second light guide, a third light guide and a PCBA being installed in the light-emitting component installation cavity, the PCBA dividing the light-emitting component installation cavity into a first chamber and a second chamber, the first light guide being installed in the first chamber, a side of the PCBA close to the first chamber being integrated with a plurality of first LEDs emitting light toward the first light guide, the anti-light leakage bracket, the second light guide and the third light guide being all installed in the second chamber, a side of the PCBA close to the second chamber being integrated with a plurality of second LEDs emitting light toward the second light guide and a plurality of third LEDs emitting light toward the third light guide, the anti-light leakage bracket being shielded between the second light guide and the third light guide, and between each second LED and each third LED.

[0008] By adopting the above anti-light-crossing structure of the automobile rear combination lamp, the first light guide, the second light guide and the third light guide are independently physically separated by using PCBA and anti-light-leakage bracket, thereby effectively solving the problem of light cross-talk between adjacent light guides and effectively improving the visual effects of various lighting effects achieved by the automobile rear combination lamp; at the same time, compared with the Chinese utility model patent with publication number CN219177535U, the automobile rear combination lamp of the utility model only uses one PCBA to realize the function of sending light to the first light guide, the second light guide and the third light guide respectively, which not only effectively reduces the production cost, but also there is no wiring harness inside the lamp, which is easy to realize automated production, and improves the production efficiency and the stability of product quality.

[0009] In some embodiments, the light leakage prevention bracket, PCBA and main bracket together form a closed cavity with a closed structure, and the third light guide and each third LED are located in the closed cavity.

[0010] In some embodiments, the back cover is integrally formed with a plurality of back cover limit clips compatible with the PCBA, and the main bracket is integrally formed with a plurality of bracket limit clips compatible with the PCBA, and the opposite side outer edges of the PCBA are respectively inserted into each back cover limit clip and each bracket limit clip.

[0011] In some embodiments, the first light output segment of the first light guide, the second light output segment of the second light guide, and the third light output segment of the third light guide are all parallel to the PCBA, the outer end face of the first light output segment is the first light output end face directly facing the mask, the outer end face of the second light output segment is the second light output end face directly facing the mask, and the outer end face of the third light output segment is the third light output end face directly facing the mask.

[0012] In some embodiments, the inner end of the first light output segment has a first light input segment extending toward the PCBA, and the end of the first light input segment away from the first light output segment has a first concentrator corresponding to each first LED one by one, and the light output end face of each first LED is respectively opposite to the light input end face of the corresponding first concentrator; the inner end of the second light output segment has a second light input segment extending toward the PCBA, and the end of the second light input segment away from the second light output segment has a second concentrator corresponding to each second LED one by one, and the light output end face of each second LED is respectively opposite to the light input end face of the corresponding second concentrator; the inner end of the third light output segment has a third light input segment extending toward the PCBA, and the end of the third light input segment away from the third light output segment has a third concentrator corresponding to each third LED one by one, and the light output end face of each third LED is respectively opposite to the light input end face of the corresponding third concentrator.

[0013] In some embodiments, the outer chamfer at the junction of the first light input segment and the first light output segment forms a first reflective surface, and the first reflective surface is molded with a first optical pattern; the outer chamfer at the junction of the second light input segment and the second light output segment forms a second reflective surface, and the second reflective surface is molded with a second optical pattern; the outer chamfer at the junction of the third light input segment and the third light output segment forms a third reflective surface, and the third reflective surface is molded with a third optical pattern.

[0014] In some embodiments, the second light guide, the third light guide, the first light guide and the PCBA are all located on a side of the main bracket away from the mask, and the main bracket is provided with a first through hole for a first light emitting segment of the first light guide to pass through, a second through hole for a second light emitting segment of the second light guide to pass through, and a third through hole for a third light emitting segment of the third light guide to pass through, the first through hole protrudes outwardly to form a first annular boss, and an annular gap is left between the circumferential outer wall of the first light emitting segment and the first annular boss, the second through hole protrudes outwardly to form a second annular boss, and an annular gap is left between the circumferential outer wall of the second light emitting segment and the second annular boss, the third through hole protrudes outwardly to form a third annular boss, and an annular gap is left between the circumferential outer wall of the third light emitting segment and the third annular boss. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of the rear combination lamp of an automobile from one viewing angle;

[0016] Figure 2 This is a structural diagram of the rear combination lamp of an automobile from another perspective;

[0017] Figure 3 A schematic diagram of the structure for removing the mask of the rear combination lamp of an automobile;

[0018] Figure 4 Schematic diagram of the structure for removing the mask and rear cover of the rear combination lamp of the vehicle;

[0019] Figure 5 It is a schematic diagram of the coordination relationship among the PCBA, the light leakage prevention bracket, the first light guide and the third light guide;

[0020] Figure 6 It is a structural diagram of PCBA;

[0021] Figure 7 is a schematic structural diagram of a first light guide;

[0022] Figure 8 is a schematic structural diagram of a second light guide;

[0023] Fig. 9 is a schematic structural diagram of a third light guide;

[0024] Fig.10 is a schematic diagram of the structure of the mask;

[0025] Fig.11 It is a schematic diagram of the structure of the back cover;

[0026] Fig.12 It is a schematic diagram of the structure of the light leakage prevention bracket. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with embodiments and drawings.

[0028] like Figure 1-Figure 12 As shown, a light leakage prevention structure of a rear combination lamp of an automobile mainly comprises a rear cover 1, a mask 2, a main bracket 3, a light leakage prevention bracket 4, a first light guide 7, a second light guide 5, a third light guide 6 and a PCBA 8. The mask 2 is covered on the rear cover 1, and the main bracket 3 is installed in the space enclosed by the rear cover 1 and the mask 2. The main bracket 3 and the rear cover 1 enclose a light-emitting component installation cavity, and the light leakage prevention bracket 4, the first light guide 7, the second light guide 5, the third light guide 6 and the PCBA 8 are all installed in the light-emitting component installation cavity.

[0029] Among them, PCBA8 divides the light-emitting component installation cavity into a first cavity and a second cavity, and the substrate of PCBA8 is opaque, so PCBA8 can isolate the light between the first cavity and the second cavity. The first light guide 7 is installed in the first cavity, and the side of PCBA8 close to the first cavity is integrated with a plurality of first LEDs 8a that emit light to the first light guide 7, and the second light guide 5 and the third light guide 6 are both installed in the second cavity, and the side of PCBA8 close to the second cavity is integrated with a plurality of second LEDs 8b that emit light to the second light guide 5 and a plurality of third LEDs 8c that emit light to the third light guide 6. That is, the light emitted by each first LED 8a is emitted to the first light-incoming section 7b of the first light guide 7, the light emitted by each second LED 8b is emitted to the second light-incoming section 5b of the second light guide 5, and the light emitted by each third LED 8c is emitted to the third light-incoming section 6b of the third light guide 6. After the first light guide 7 , the second light guide 5 and the third light guide 6 are lit, due to the presence of PCBA 8 , the light emitted by the first light guide 7 will not affect the second light guide 5 and the third light guide 6 , and the light emitted by the second light guide 5 and the third light guide 6 will not affect the first light guide 7 .

[0030] Similarly, the light leakage prevention bracket 4 is arranged in the second chamber, and the light leakage prevention bracket 4 is shielded between the second light guide 5 and the third light guide 6, and between each second LED 8b and each third LED 8c. The light leakage prevention bracket 4 is made of a light-proof plastic material, so after the second light guide 5 and the third light guide 6 are lit, due to the existence of the light leakage prevention bracket 4, the light emitted from the second light guide 5 will not affect the third light guide 6, and the light emitted from the third light guide 6 will not affect the second light guide 5.

[0031] Therefore, this embodiment utilizes PCBA8 and anti-light leakage bracket 4 to independently physically separate the first light guide 7, the second light guide 5 and the third light guide 6, thereby effectively solving the problem of light leakage between adjacent light guides and effectively improving the visual effects of various lighting effects achieved by the automobile rear combination lamp; at the same time, compared with the Chinese utility model patent with publication number CN219177535U, the automobile rear combination lamp of the utility model only uses one PCBA8 to realize the function of sending light to the first light guide 7, the second light guide 5 and the third light guide 6 respectively, which not only effectively reduces the production cost, but also there is no wiring harness inside the lamp, which is easy to realize automated production, thereby improving production efficiency and product quality stability.

[0032] For further information, see Figure 4 and Figure 5 The anti-light leakage bracket 4, PCBA8 and main bracket 3 together form a closed cavity with a closed structure. The third light guide 6 and each third LED 8c are located in the closed cavity, which can achieve complete physical isolation and good anti-light leakage effect.

[0033] See also Fig.12 The anti-light leakage bracket 4 is a cover structure with openings on one side close to the PCBA 8 and one side close to the main bracket 3 , and a plurality of reinforcing ribs 4 e are integrally formed on the inner surface of the anti-light leakage bracket 4 , which can improve the structural strength of the anti-light leakage bracket 4 .

[0034] See also Figure 4 and Fig.11 The back cover 1 is integrally formed with a plurality of back cover limit clips 1b that match the PCBA8, and the main bracket 3 is integrally formed with a plurality of bracket limit clips 3g that match the PCBA8. The outer edges of the two opposite sides of the PCBA8 are respectively inserted into the back cover limit clips 1b and the bracket limit clips 3g, ensuring the reliable installation of the PCBA8. In addition, the width of the gap between the back cover limit clips 1b and the bracket limit clips 3g can be adjusted by means of gaskets, etc., which can better support the PCBA8 and prevent abnormal noise.

[0035] See also Figure 2 , Figure 6 and Fig.11, a connector 8d is integrated on PCBA8, all PIN pins 8d1 of the connector 8d extend toward the direction close to the rear cover 1, and each PIN pin 8d1 is inserted into the same PIN positioning block 8d2, and a mounting positioning hole 1a matching with the PIN positioning block 8d2 is provided on the rear cover 1, and the PIN positioning block 8d2 is embedded in the mounting positioning hole 1a, and the outer end of each PIN pin 8d1 extends into the plug-in sleeve 1b of the rear cover 1, that is, the PIN positioning block 8d2 and the mounting positioning hole 1a are positioned and matched. Therefore, when the internal parts are assembled with the rear cover 1, the connector 8d is designed as one of the positioning structures to ensure the position of the PIN pin 8d1 and the plug-in sleeve 1b, which can effectively avoid the difficulty of assembling the whole vehicle connector.

[0036] See also Figure 3-Figure 5 and Fig.10 The first light guide 7, the second light guide 5, the third light guide 6 and the PCBA 8 are all located on the side of the main bracket 3 away from the mask 2. The main bracket 3 is provided with a first through hole 3a, a second through hole 3b and a third through hole 3c, wherein the outer end of the first light emitting segment 7a of the first light guide 7 slightly passes through the first through hole 3a, the outer end of the second light emitting segment 5a of the second light guide 5 slightly passes through the second through hole 3b, and the outer end of the third light emitting segment 6a of the third light guide 6 slightly passes through the third through hole 3c. Such a design can also play a role in preventing light from leaking out.

[0037] Furthermore, the first via hole 3a protrudes outward to form a first annular boss 3d, an annular gap is left between the circumferential outer wall of the first light-emitting section 7a and the first annular boss 3d, the second via hole 3b protrudes outward to form a second annular boss 3e, an annular gap is left between the circumferential outer wall of the second light-emitting section 5a and the second annular boss 3e, the third via hole 3c protrudes outward to form a third annular boss 3f, and an annular gap is left between the circumferential outer wall of the third light-emitting section 6a and the third annular boss 3f. The requirements of the shape are met by the above-mentioned outwardly protruding first annular boss 3d, second annular boss 3e and third annular boss 3f, and the design of leaving annular gaps between the corresponding first light-emitting section 7a, second light-emitting section 5a and third light-emitting section 6a can avoid friction and vibration between the hands, thereby avoiding the problem of abnormal noise.

[0038] In this embodiment, the outer end face of the first light emitting segment 7a is the first light emitting end face 7a1 directly facing the mask 2, the outer end face of the second light emitting segment 5a is the second light emitting end face 5a1 directly facing the mask 2, and the outer end face of the third light emitting segment 6a is the third light emitting end face 6a1 directly facing the mask 2.

[0039] Correspondingly, the mask 2 includes a mask body 2a made of light-shielding plastic material, and a first light-transmitting plate 2b, a second light-transmitting plate 2c, and a third light-transmitting plate 2d all made of light-transmitting plastic material, the first light-emitting end face 7a1 faces the first light-transmitting plate 2b, the second light-emitting end face 5a1 faces the second light-transmitting plate 2c, and the third light-emitting end face 6a1 faces the third light-transmitting plate 2d. Through such a design, not only can the light effect of the first light-transmitting plate 2b, the second light-transmitting plate 2c, and the third light-transmitting plate 2d be ensured when they are lit, but the opaque mask body 2a can also play a certain anti-light-channeling effect, and at the same time can also play a role in covering up the ugliness of the internal parts.

[0040] Furthermore, the mask body 2a, the first light-transmitting plate 2b, the second light-transmitting plate 2c and the third light-transmitting plate 2d are integrally formed using a multi-color injection molding process, thereby ensuring the stability and reliability of the overall structure and avoiding problems such as cracks and poor bonding.

[0041] In this embodiment, the outer surface of the third light-transmitting plate 2d is a planar structure. At the same time, a part of the inner surface of the third light-transmitting plate 2d is a fog lamp area 2d1 with a planar structure. The projection of the third light-emitting end surface 6a1 on the third light-transmitting plate 2d is the fog lamp area 2d1, so as to facilitate the transmission of light emitted from the third light-emitting end surface 6a1 to the third light-transmitting plate 2d to ensure brightness. The remaining part is a retro-reflective area 2d2 formed with a reflective optical pattern, so that it can reflect light when it is emitted from the following vehicle, thereby improving driving safety at night.

[0042] Furthermore, the retro-reflective region 2d2 surrounds the fog lamp region 2d1 to increase the area of ​​the retro-reflective region 2d2 as much as possible.

[0043] In this embodiment, the first light-emitting section 7a, the second light-emitting section 5a and the third light-emitting section 6a are all parallel to the PCBA 8. The first light-incoming section 7b extends from the inner end of the first light-emitting section 7a toward the PCBA 8, and the first light-incoming section 7b has a first concentrator 7c corresponding to each first LED 8a at one end away from the first light-emitting section 7a, and the light-emitting end face of each first LED 8a is respectively opposite to the light-incoming end face of the corresponding first concentrator 7c, so that the light emitted by each first LED 8a can be retained in the first light guide 7 as much as possible, thereby improving the light-emitting brightness of the first light-emitting end face 7a1.

[0044] Similarly, the second light input section 5b extends from the inner end of the second light output section 5a toward PCBA8, and the end of the second light input section 5b away from the second light output section 5a has a second concentrator 5c corresponding to each second LED 8b one by one, and the light output end face of each second LED 8b is opposite to the light input end face of the corresponding second concentrator 5c, so that as much light emitted by each second LED 8b as possible can be retained in the second light guide 5, thereby improving the light output brightness of the second light output end face 5a1.

[0045] Similarly, the third light input section 6b extends from the inner end of the third light output section 6a toward PCBA8, and the end of the third light input section 6b away from the third light output section 6a has a third concentrator 6c corresponding to each third LED 8c one by one, and the light output end face of each third LED 8c is opposite to the light input end face of the corresponding third concentrator 6c, so that as much light emitted by each third LED 8c as possible can be retained in the third light guide 6, thereby improving the light output brightness of the third light output end face 6a1.

[0046] It should be pointed out that the structures of the first concentrator 7c, the second concentrator 5c and the third concentrator 6c are prior art, please refer to the Chinese patent with announcement number CN115164119A.

[0047] See also Figure 7-Figure 9 The first light-incoming section 7b and the first light-emitting section 7a are connected at the outer chamfer to form a first reflective surface 7d, on which a first optical pattern is formed; the second light-incoming section 5b and the second light-emitting section 5a are connected at the outer chamfer to form a second reflective surface 5d, on which a second optical pattern is formed; the third light-incoming section 6b and the third light-emitting section 6a are connected at the outer chamfer to form a third reflective surface 6d, on which a third optical pattern is formed. Through the design provided, the light of the first light-incoming section 7b, the second light-incoming section 5b and the third light-incoming section 6b can be directed as much as possible to the first light-emitting section 7a, the second light-emitting section 5a and the third light-incoming section 6b, thereby improving the light output brightness of the first light-emitting end surface 7a1, the second light-emitting end surface 5a1 and the third light-emitting end surface 6a1.

[0048] Furthermore, the outer end of the second light emitting section 5a is widened to form an extension section 5a2. In order to enhance the light emitting brightness of the second light emitting end surface 5a1 corresponding to the extension section 5a2, an enhanced reflective optical pattern 5a3 is formed on the inner end surface of the extension section 5a2.

[0049] In this embodiment, the second light guide 5 is a reversing light guide, the third light guide 6 is a fog light guide, and the first light guide 7 is a rear position light turn signal guide.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. An anti-light-channeling structure for a rear combination lamp of an automobile, comprising a rear cover and a mask covering the rear cover, wherein a main bracket is installed in the space enclosed by the rear cover and the mask, and characterized in that: The main bracket and the back cover are combined to form a light-emitting component installation cavity, in which an anti-light leakage bracket, a first light guide, a second light guide, a third light guide and a PCBA are installed, and the PCBA divides the light-emitting component installation cavity into a first chamber and a second chamber, the first light guide is installed in the first chamber, and a side of the PCBA close to the first chamber is integrated with a plurality of first LEDs that emit light to the first light guide, the anti-light leakage bracket, the second light guide and the third light guide are all installed in the second chamber, and a side of the PCBA close to the second chamber is integrated with a plurality of second LEDs that emit light to the second light guide and a plurality of third LEDs that emit light to the third light guide, and the anti-light leakage bracket is shielded between the second light guide and the third light guide, and between each second LED and each third LED.

2. The anti-light channeling structure of the automobile rear combination lamp according to claim 1, characterized in that: The anti-light leakage bracket, PCBA and main bracket together form a closed cavity with a closed structure, and the third light guide and each third LED are located in the closed cavity.

3. The anti-light channeling structure of the automobile rear combination lamp according to claim 1, characterized in that: The back cover is integrally formed with a plurality of back cover limit clips that are compatible with the PCBA, and the main bracket is integrally formed with a plurality of bracket limit clips that are compatible with the PCBA, and the outer edges of the two opposite sides of the PCBA are respectively inserted into the back cover limit clips and the bracket limit clips.

4. The anti-light channeling structure of the automobile rear combination lamp according to claim 1, characterized in that: The first light emitting segment of the first light guide, the second light emitting segment of the second light guide and the third light emitting segment of the third light guide are all parallel to the PCBA, the outer end face of the first light emitting segment is directly facing the first light emitting end face of the mask, the outer end face of the second light emitting segment is directly facing the second light emitting end face of the mask, and the outer end face of the third light emitting segment is directly facing the third light emitting end face of the mask.

5. The anti-light channeling structure of the automobile rear combination lamp according to claim 4, characterized in that: The inner end of the first light emitting section has a first light input section extending toward the PCBA, and the end of the first light input section away from the first light emitting section has first concentrators corresponding to the first LEDs respectively, and the light emitting end faces of the first LEDs respectively face the light input end faces of the corresponding first concentrators. The inner end of the second light emitting section has a second light input section extending toward the PCBA, and the end of the second light input section away from the second light emitting section has second concentrators corresponding to the second LEDs respectively, and the light output end faces of the second LEDs respectively face the light input end faces of the corresponding second concentrators. The inner end of the third light emitting section has a third light input section extending toward the PCBA, and the end of the third light input section away from the third light emitting section has third concentrators corresponding to the third LEDs respectively, and the light output end faces of the third LEDs respectively face the light input end faces of the corresponding third concentrators.

6. The anti-light channeling structure of the automobile rear combination lamp according to claim 5, characterized in that: The outer chamfer at the junction of the first light input section and the first light output section forms a first reflective surface, and a first optical pattern is formed on the first reflective surface; the outer chamfer at the junction of the second light input section and the second light output section forms a second reflective surface, and a second optical pattern is formed on the second reflective surface; the outer chamfer at the junction of the third light input section and the third light output section forms a third reflective surface, and a third optical pattern is formed on the third reflective surface.

7. The anti-light channeling structure of the automobile rear combination lamp according to claim 4, characterized in that: The second light guide, the third light guide, the first light guide and the PCBA are all located on a side of the main bracket away from the mask. The main bracket is provided with a first through hole for the first light emitting segment of the first light guide to pass through, a second through hole for the second light emitting segment of the second light guide to pass through, and a third through hole for the third light emitting segment of the third light guide to pass through. The first through hole protrudes outwardly to form a first annular boss, and an annular gap is left between the circumferential outer wall of the first light emitting segment and the first annular boss. The second through hole protrudes outwardly to form a second annular boss, and an annular gap is left between the circumferential outer wall of the second light emitting segment and the second annular boss. The third through hole protrudes outwardly to form a third annular boss, and an annular gap is left between the circumferential outer wall of the third light emitting segment and the third annular boss.

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