Low-cost automobile rear combination lamp convenient for realizing automatic production

Abstract

The utility model discloses a low-cost automobile rear combination lamp convenient for realizing automatic production, an internal device assembly fixed on a rear cover through hot melting is arranged in a component mounting cavity, the internal device assembly consists of a main bracket, a first light guide, a PCBA (Printed Circuit Board Assembly) and a light guide structure which are fixed into a whole through hot melting, and the internal device assembly is fixed on the rear cover through hot melting; a gap between the rear cover and the mask is sealed through vibration friction welding. By the adoption of the low-cost automobile rear combination lamp convenient to achieve automatic production, a plurality of PCBAs are not needed, the production cost is effectively reduced, no wire harness exists in the lamp, and automatic production is easy to achieve; moreover, the rear cover, the main support, the first light guide, the PCBA and the light guide structure are connected in a hot melting mode, the rear cover and the mask are sealed through vibration friction welding, no extra part is needed, the part cost and the management difficulty are reduced, automatic assembly is very convenient, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle lamps, in particular to a low-cost automobile rear combination lamp that is easy to realize automated production. 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., different PCBAs with integrated LEDs need to be configured for different lamps, which not only leads to high costs, but also different PCBAs need to be connected through wiring harnesses, which can usually only be done manually, and automated production is difficult to achieve.

[0004] Moreover, existing automobile rear combination lamps are usually fastened by screws, which not only makes automated assembly relatively difficult to achieve and results in high equipment costs, but also results in high production costs and low assembly efficiency due to the large number of screws.

[0005] Solving the above problems has become a top priority. Utility Model Content

[0006] In order to solve the technical problems of high production cost and great difficulty in realizing automated production of existing automobile rear combination lamps, the utility model provides a low-cost automobile rear combination lamp that is easy to realize automated production.

[0007] The technical solution is as follows:

[0008] The first aspect of the present application relates to a low-cost automotive rear combination lamp that is easy to realize automated production, comprising a component installation cavity formed by a rear cover and a mask, wherein an internal device assembly fixed to the rear cover by hot melt is installed in the component installation cavity, wherein the internal device assembly is composed of a main bracket, a first light guide, a PCBA and a light guide structure fixed as a whole by hot melt, wherein the internal device assembly is fixed to the rear cover by hot melt, and a gap between the rear cover and the mask is sealed by vibration friction welding;

[0009] The PCBA is blocked between the first light guide and the light guide structure, a side of the PCBA close to the first light guide is integrated with a plurality of first LEDs that emit light toward the first light guide, and a side of the PCBA close to the light guide structure is integrated with a plurality of LED components that emit light from the light guide structure.

[0010] The above low-cost automobile rear combination lamp is easy to realize automated production. A PCBA integrates a first LED and an LED component that respectively transmit light to a first light guide and a light guide structure, thereby solving the problem that the existing automobile rear combination lamp requires multiple PCBAs. Not only does it effectively reduce the production cost, but there is no wiring harness inside the lamp, which is easy to realize automated production. In addition, the rear cover, the main bracket, the first light guide, the PCBA and the light guide structure are connected by hot melting, and the rear cover and the mask are sealed by vibration friction welding. Compared with the traditional screw fastening method, not only does it not require any additional parts, reducing the cost of parts and the difficulty of management, but it is also very convenient for automated assembly and improves assembly efficiency. At the same time, the automation equipment structure of the hot melting process and the vibration friction welding process is simple and reliable, which reduces the investment cost of the automation equipment.

[0011] In some embodiments, the light guide structure includes a second light guide, and the LED assembly includes a plurality of second LEDs that emit light toward the second light guide.

[0012] In some embodiments, the light guide structure includes an anti-leakage light bracket, a second light guide and a third light guide, the LED assembly includes 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, the anti-leakage light 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.

[0013] In some embodiments, the first light guide is integrally formed with a plurality of first light guide heat-melting pins and a plurality of first pin holes of the bracket, the second light guide is integrally formed with a plurality of second pin holes of the bracket, the third light guide is integrally formed with a plurality of third light guide heat-melting pins, a plurality of third pin holes of the bracket and a plurality of limit pins, the anti-light leakage bracket is integrally formed with a plurality of first light guide pin holes, a plurality of third light guide pin holes and a plurality of fourth pin holes of the bracket, and the fourth pin holes of each bracket are arranged one by one on the outside of the third pin holes of each bracket, and the back cover is integrally formed with a plurality of back covers on the side close to the main bracket. Positioning pins and a plurality of rear cover hot-melt pins, the main bracket is integrally formed with a first bracket hot-melt pin corresponding to each first pin hole of each bracket, a second bracket hot-melt pin corresponding to each second pin hole of each bracket, a third bracket hot-melt pin corresponding to each third pin hole of each bracket, a bracket positioning hole corresponding to each rear cover positioning pin, and a bracket hot-melt hole corresponding to each rear cover hot-melt pin, and the PCBA is provided with a circuit board pin hole corresponding to each first optical conductive hot-melt pin and a circuit board limit hole corresponding to each limit pin;

[0014] Some of the first optical thermal melt pins are respectively passed through the corresponding circuit board pin holes and then fixed on the PCBA by hot melt, and the remaining first optical thermal melt pins are respectively passed through the corresponding circuit board pin holes and the first optical guide pin holes in sequence and then fixed on the anti-light leakage bracket by hot melt, and each limit pin is respectively embedded in the corresponding circuit board limit hole, and each third optical thermal melt pin is respectively passed through the corresponding third optical guide pin hole in sequence and then fixed on the anti-light leakage bracket by hot melt;

[0015] The first hot melt pin of each bracket passes through the corresponding first pin hole of the bracket and is fixed to the first light guide by hot melt. The second hot melt pin of each bracket passes through the corresponding second pin hole of the bracket and is fixed to the second light guide by hot melt. The third hot melt pin of each bracket passes through the corresponding third pin hole of the bracket and the fourth pin hole of the bracket in sequence and is fixed to the anti-light leakage bracket by hot melt.

[0016] Each rear cover positioning pin is respectively embedded in the corresponding bracket positioning hole, and each rear cover hot-melt pin passes through the corresponding bracket hot-melt hole and is fixed on the main bracket by hot-melt.

[0017] In some embodiments, a plurality of mounting clips are integrally formed on the light leakage prevention bracket, and mounting slots corresponding to the mounting clips are opened on the PCBA, and the mounting clips are respectively inserted into the corresponding mounting slots.

[0018] In some embodiments, a plurality of light guide limiting ribs are integrally formed on the second light guide, and one side of the outer end of each light guide limiting rib is recessed to form a first limiting snap-in, and the outer edge of the PCBA is recessed to form second limiting snap-in corresponding to each first limiting snap-in, and each first limiting snap-in is respectively engaged with the corresponding second limiting snap-in.

[0019] In some embodiments, 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 surface of the first light emitting segment is directly facing the first light emitting end surface of the mask, the outer end surface of the second light emitting segment is directly facing the second light emitting end surface of the mask, and the outer end surface of the third light emitting segment is directly facing the third light emitting end surface of the mask;

[0020] The inner end of the first light-emitting section has a first light-incoming section extending toward the PCBA, and the end of the first light-incoming section away from the first light-emitting section has first light concentrators corresponding to the first LEDs, and the light-emitting end faces of the first LEDs are respectively facing the light-incoming end faces of the corresponding first light concentrators. The inner end of the second light-emitting section has a second light-incoming section extending toward the PCBA, and the end of the second light-incoming section away from the second light-emitting section has second light concentrators corresponding to the second LEDs, and the light-emitting end faces of the second LEDs are respectively facing the light-incoming end faces of the corresponding second light concentrators. The inner end of the third light-emitting section has a third light-incoming section extending toward the PCBA, and the end of the third light-incoming section away from the third light-emitting section has third light concentrators corresponding to the third LEDs, and the light-emitting end faces of the third LEDs are respectively facing the light-incoming end faces of the corresponding third light concentrators.

[0021] 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.

[0022] In some embodiments, the mask includes a mask body made of a light-shielding plastic material and a first light-transmitting plate, a second light-transmitting plate, and a third light-transmitting plate all made of a light-transmitting plastic material, the mask body, the first light-transmitting plate, the second light-transmitting plate, and the third light-transmitting plate are integrally formed by a multi-color injection molding process, the first light-emitting end face faces the first light-transmitting plate, the second light-emitting end face faces the second light-transmitting plate, and the third light-emitting end face faces the third light-transmitting plate;

[0023] The outer surface of the third light-transmitting plate is a planar structure, a portion of the inner surface of the third light-transmitting plate is a fog lamp area with a planar structure, and the remaining portion is a retro-reflective area formed with a reflective optical pattern, and the projection of the third light-emitting end face on the third light-transmitting plate is the fog lamp area.

[0024] In some embodiments, a connector is integrated on the PCBA, all PIN pins of the connector extend in a direction close to the back cover, and each PIN pin is inserted into the same PIN positioning block. An installation positioning hole matching the PIN positioning block is provided on the back cover, and the PIN positioning block is embedded in the installation positioning hole, and the outer end of each PIN pin extends into the plug-in sheath of the back cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of one viewing angle of the embodiment 1 of the rear combination lamp of an automobile;

[0026] Figure 2It is a structural schematic diagram of another viewing angle of the embodiment 1 of the rear combination lamp of an automobile;

[0027] Figure 3 This is a structural schematic diagram of the embodiment 1 of the rear combination lamp of an automobile with the mask removed;

[0028] Figure 4 A schematic diagram of the structure of the automobile rear combination lamp embodiment 1 with the mask and rear cover removed;

[0029] Figure 5 It is a schematic diagram of the matching relationship among the PCBA, the light leakage prevention bracket, the first light guide and the third light guide of the embodiment 1 of the automobile rear combination lamp;

[0030] Figure 6 It is a structural schematic diagram of the PCBA of the embodiment 1 of the rear combination lamp of an automobile;

[0031] Figure 7 It is a schematic structural diagram of a first light guide of Example 1 of a rear combination lamp for an automobile;

[0032] Figure 8 It is a schematic structural diagram of a second light guide of Embodiment 1 of a rear combination lamp for an automobile;

[0033] Fig. 9 It is a schematic structural diagram of the third light guide of the embodiment 1 of the rear combination lamp for an automobile;

[0034] Fig.10 It is a structural schematic diagram of a mask of a first embodiment of a rear combination lamp for an automobile;

[0035] Fig.11 It is a structural schematic diagram of the rear cover of the embodiment 1 of the rear combination lamp for automobile;

[0036] Fig.12 It is a structural schematic diagram of the light leakage prevention bracket of the embodiment 1 of the rear combination lamp of the automobile;

[0037] Fig.13 A schematic diagram of the structure of the second embodiment of the rear combination lamp for automobile with the mask and the rear cover removed;

[0038] Fig.14 It is a schematic structural diagram of the mask of embodiment 2 of the rear combination lamp of an automobile. DETAILED DESCRIPTION

[0039] The utility model is further described below in conjunction with embodiments and drawings.

[0040] Embodiment 1:

[0041] like Figure 1-Figure 12As shown, a low-cost automotive rear combination lamp that is easy to realize automated production mainly includes a component installation cavity formed by a rear cover 1 and a mask 2, an internal device assembly fixed on the rear cover 1 by hot melt is installed in the component installation cavity, and the internal device assembly is composed of a main bracket 3, a first light guide 7, a PCBA8 and a light guide structure fixed as a whole by hot melt, and the internal device assembly is fixed on the rear cover 1 by hot melt, and the gap between the rear cover 1 and the mask 2 is sealed by vibration friction welding. PCBA8 is blocked between the first light guide 7 and the light guide structure, and a plurality of first LEDs 8a that emit light to the first light guide 7 are integrated on the side of PCBA8 close to the first light guide 7, and a plurality of LED components that emit light to the light guide structure are integrated on the side of PCBA8 close to the light guide structure. That is, the light emitted by each first LED 8a is emitted to the first light inlet section 7b of the first light guide 7, and the light emitted by the LED components is emitted to the light guide structure.

[0042] Therefore, this embodiment solves the problem that the existing automobile rear combination lamp requires multiple PCBAs by being able to simultaneously send light to the first light guide 7 and the light guide structure on one PCBA 8, which not only effectively reduces the production cost, but also does not have any wiring harness inside the lamp, which is easy to realize automated production, thereby improving production efficiency and product quality stability; and, the rear cover 1, the main bracket 3, the first light guide 7, the PCBA 8 and the light guide structure are connected by hot melting, and the rear cover 1 and the mask 2 are sealed by vibration friction welding. Compared with the traditional screw fastening method, not only does it not require any additional parts, thus reducing the cost of parts and the difficulty of management, but it is also very convenient for automated assembly, thereby improving assembly efficiency. At the same time, the automation equipment structure of the hot melting process and the vibration friction welding process is simple and reliable, thereby reducing the investment cost of the automation equipment.

[0043] In this embodiment, the light guide structure includes a light leakage prevention bracket 4 , a second light guide 5 and a third light guide 6 , and the LED assembly includes a plurality of second LEDs 8 b emitting light to the second light guide 5 and a plurality of third LEDs 8 c emitting light to the third light guide 6 .

[0044] Among them, the main bracket 3 and the back cover 1 are enclosed to form a light-emitting component installation cavity, and the PCBA8 divides the light-emitting component installation cavity into a first cavity and a second cavity. The substrate of the PCBA8 is opaque, so the 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 the PCBA8 close to the first cavity is integrated with a plurality of first LEDs 8a that emit light to the first light guide 7. The second light guide 5 and the third light guide 6 are both installed in the second cavity, and the side of the 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 from the first light guide 7 will not affect the second light guide 5 and the third light guide 6 , and the light emitted from the second light guide 5 and the third light guide 6 will not affect the first light guide 7 .

[0045] 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.

[0046] Therefore, this embodiment uses PCBA 8 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.

[0047] 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.

[0048] 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 .

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] See also Figure 7-Figure 9The 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.

[0063] 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.

[0064] 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.

[0065] See also Figure 3-Figure 12 The first light guide 7 is integrally formed with a plurality of first light guide heat-melting pins 7e and a plurality of bracket first pin holes 7f, the second light guide 5 is integrally formed with a plurality of bracket second pin holes 5e, the third light guide 6 is integrally formed with a plurality of third light guide heat-melting pins 6e, a plurality of bracket third pin holes 6f and a plurality of limit pins 6g, the anti-light leakage bracket 4 is integrally formed with a plurality of first light guide pin holes 4a, a plurality of third light guide pin holes 4b and a plurality of bracket fourth pin holes 4c, and the fourth pin holes 4c of each bracket are arranged one by one on the outer side of the third pin hole 6f of each bracket, and the side of the rear cover 1 close to the main bracket 3 is integrally formed with a plurality of rear cover positioning pins 1c and a plurality of rear cover Hot melt pin 1d, the main bracket 3 is integrally formed with a bracket first hot melt pin 3h corresponding to each bracket first pin hole 7f, a bracket second hot melt pin 3i corresponding to each bracket second pin hole 5e, a bracket third hot melt pin 3j corresponding to each bracket third pin hole 6f, a bracket positioning hole 3k corresponding to each rear cover positioning pin 1c, and a bracket hot melt hole 3m corresponding to each rear cover hot melt pin 1d, and PCBA8 is provided with a circuit board pin hole 8e corresponding to each first optical conductor hot melt pin 7e and a circuit board limit hole 8f corresponding to each limit pin 6g.

[0066] In this embodiment, some of the first light guide heat-melt pins 7e pass through the corresponding circuit board pin holes 8e and are fixed on the PCBA8 by heat melting, and the remaining first light guide heat-melt pins 7e pass through the corresponding circuit board pin holes 8e and the first light guide pin holes 4a in sequence and are fixed on the anti-light leakage bracket 4 by heat melting, thereby ensuring a reliable heat-melt connection between the first light guide 7 and the PCBA8 and the anti-light leakage bracket 4.

[0067] Each limiting pin 6g is respectively embedded in the corresponding circuit board limiting hole 8f, and each third optical waveguide hot-melt pin 6e is respectively and sequentially fixed on the anti-light leakage bracket 4 through hot-melt into the corresponding third optical waveguide pin hole 4b, thereby ensuring a reliable hot-melt connection between the third optical waveguide 6 and the PCBA8 and the anti-light leakage bracket 4.

[0068] The first hot-melt pin 3h of each bracket passes through the corresponding first pin hole 7f of the bracket and is fixed on the first light guide 7 by hot-melt. The second hot-melt pin 3i of each bracket passes through the corresponding second pin hole 5e of the bracket and is fixed on the second light guide 5 by hot-melt. The third hot-melt pin 3j of each bracket passes through the corresponding third pin hole 6f of the bracket and the fourth pin hole 4c of the bracket in sequence and is fixed on the anti-light leakage bracket 4 by hot-melt, thereby ensuring a reliable hot-melt connection among the bracket 3, the first light guide 7, the second light guide 5, the third light guide 6 and the anti-light leakage bracket 4.

[0069] Each rear cover positioning pin 1c is respectively embedded in the corresponding bracket positioning hole 3k, and each rear cover hot melt pin 1d passes through the corresponding bracket hot melt hole 3m and is hot-melted and fixed on the main bracket 3, ensuring a reliable hot-melt connection between the rear cover 1 and the internal component assembly fixed as one by the above hot melt.

[0070] Furthermore, a plurality of mounting buckles 4d are integrally formed on the light leakage prevention bracket 4, and mounting bayonet holes 8g corresponding to the mounting buckles 4d are provided on the PCBA 8, and the mounting buckles 4d are respectively inserted into the corresponding mounting bayonet holes 8g. The light leakage prevention bracket 4 is first positioned with the PCBA 8 by snap-fitting, and then the hot melt pins are hot melted to ensure the installation accuracy.

[0071] Similarly, a plurality of light guide limiting ribs 5f are integrally formed on the second light guide 5, and one side of the outer end of each light guide limiting rib 5f is recessed to form a first limiting bayonet 5f1, and the outer edge of the PCBA8 is recessed to form second limiting bayonet 8h corresponding to each first limiting bayonet 5f1, and each first limiting bayonet 5f1 is respectively engaged with the corresponding second limiting bayonet 8h. The second light guide 5 is first positioned with the PCBA8 through the engagement, and then the hot melt pins are hot melted to ensure the installation accuracy.

[0072] See also Figure 2The rear cover 1 is thinned to form a plurality of air vent sheet portions 1e which can be opened as air vents, so that the air vent sheet portions 1e to be pierced as air vents can be adjusted according to the actual fogging situation, thereby improving the versatility of the automobile front decorative lamp and adapting to different models.

[0073] Embodiment 2:

[0074] See also Fig.13 and Fig.14 The structure of this embodiment is basically the same as that of the embodiment 1, except that the light guide structure only includes the second light guide 5, and accordingly, the LED assembly only includes a plurality of second LEDs 8b that emit light to the second light guide 5. This embodiment is equivalent to the fog lamp-free version of the embodiment 1, so the PCBA 8 can play a good physical anti-light leakage role for the first light guide 7 and the second light guide 5, and therefore, there is no need to set the anti-light leakage bracket 4.

[0075] Correspondingly, the third light-transmitting plate 2d of Example 1 is also entirely formed with retro-reflective areas 2d2 having reflective optical patterns.

[0076] Embodiment 3:

[0077] An automated assembly method for a low-cost automotive rear combination lamp that facilitates automated production according to an embodiment 1 is performed according to the following steps:

[0078] S1, hot-melt fixing the PCBA 8, the first light guide 7, the third light guide 6 and the light leakage prevention bracket 4 into a PCBA sub-assembly, including the following steps:

[0079] S11, each first optical thermally conductive melt pin 7e is passed through the corresponding circuit board pin hole 8e, and the pin seat of each first optical thermally conductive melt pin 7e is supported on the PCBA 8;

[0080] S12, each limiting pin 6g is respectively embedded in the corresponding limiting hole 8f of the circuit board, and the pin seat of each limiting pin 6g is supported on the PCBA8;

[0081] S13, the light leakage prevention bracket 4 is covered on the side of the third light guide 6 away from the PCBA 8, and supported on the PCBA 8, and at the same time, each first light guide pin hole 4a is penetrated with a first light guide heat-melting pin 7e, and each third light guide pin hole 4b is penetrated with a third light guide heat-melting pin 6e. When the light leakage prevention bracket 4 is covered on the side of the third light guide 6 away from the PCBA 8, each mounting buckle 4d is respectively inserted into the corresponding mounting bayonet 8g, thereby ensuring the installation accuracy of the light leakage prevention bracket 4;

[0082] S14, hot-melt each first light guide hot-melt pin 7e and each third light guide hot-melt pin 6e, so that the PCBA 8, the first light guide 7, the third light guide 6 and the anti-leakage light bracket 4 are hot-melt fixed into a PCBA sub-assembly;

[0083] In this step S1 , all the hot melt pins are located on the side of the PCBA 8 away from the first light guide 7 , and therefore, no flipping process is required.

[0084] S2, hot-melt fixing the main bracket 3, the second light guide 5 and the PCBA sub-assembly into an internal device assembly, including the following steps:

[0085] S21, install the PCBA sub-assembly on the main bracket 3, and at the same time make the first hot melt pin 3h of each bracket pass through the corresponding first pin hole 7f of the bracket, and the third hot melt pin 3j of each bracket pass through the corresponding third pin hole 6f of the bracket and the fourth pin hole 4c of the bracket in sequence, and the pin seat of the first hot melt pin 3h of each bracket is supported on the first light guide 7, and the pin seat of the third hot melt pin 3j of each bracket is supported on the third light guide 6;

[0086] S22, the second hot melt pins 3i of each bracket are respectively passed through the corresponding second pin holes 5e of the bracket, and the pin seats of the second hot melt pins 3i of each bracket are supported on the second light guide 5, and the second light guide 5 is supported on the PCBA 8. Specifically, each first limit bayonet 5f1 is respectively engaged with the corresponding second limit bayonet 8h, thereby ensuring the installation accuracy of the second light guide 5;

[0087] S23, hot-melt the first pin hole 7f of each bracket, the second hot-melt pin 3i of each bracket and the third hot-melt pin 3j of each bracket, so that the main bracket 3, the second light guide 5 and the PCBA sub-assembly are hot-melt fixed to form an internal device assembly;

[0088] In this step S2, all the hot melt pins are located on the side of the main bracket 3 close to the rear cover 1, so there is no need for flipping processing.

[0089] S3, hot-melt fixing the rear cover 1 and the internal device assembly into one, comprising the following steps:

[0090] S31, assemble the internal components on the rear cover 1, and at the same time, make each rear cover positioning pin 1c respectively embedded in the corresponding bracket positioning hole 3k, each rear cover hot melt pin 1d respectively pass through the corresponding bracket hot melt hole 3m, and the pin seat of each rear cover positioning pin 1c and the pin seat of each rear cover hot melt pin 1d are supported on the main bracket 3;

[0091] S32, hot-melt the hot-melt pins 1d of each rear cover, so that the rear cover 1 and the internal device assembly are hot-melt fixed as one;

[0092] In this step S3, all the hot melt pins are located on the side of the back cover 1 close to the mask 2, so there is no need for flipping processing.

[0093] S4. First, cover the mask 2 on the rear cover 1 so that the internal device assembly is located in the component installation cavity formed by the rear cover 1 and the mask 2, and then seal the gap between the rear cover 1 and the mask 2 by vibration friction welding.

[0094] By adopting the above automated assembly method, the hot melt process is reasonably divided into three steps from S1 to S3. Each step can be hot melted in place at one time without turning over the processed parts, reducing the number of automatic assembly stations, thereby not only improving the overall assembly efficiency but also reducing the investment cost of the equipment.

[0095] 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. A low-cost automotive rear combination lamp that is easy to realize automated production, comprising a component installation cavity formed by a rear cover and a mask, characterized in that: An internal device assembly fixed on the back cover by hot melt is installed in the component installation cavity, and the internal device assembly consists of a main bracket, a first light guide, a PCBA and a light guide structure fixed as one by hot melt. The internal device assembly is fixed on the back cover by hot melt, and the gap between the back cover and the mask is sealed by vibration friction welding; The PCBA is blocked between the first light guide and the light guide structure, a side of the PCBA close to the first light guide is integrated with a plurality of first LEDs that emit light toward the first light guide, and a side of the PCBA close to the light guide structure is integrated with a plurality of LED components that emit light from the light guide structure.

2. A low-cost automotive rear combination lamp that is easy to realize automated production according to claim 1, characterized in that: The light guide structure includes a second light guide, and the LED assembly includes a plurality of second LEDs that emit light toward the second light guide.

3. The low-cost automotive rear combination lamp that is easy to realize automated production according to claim 1, characterized in that: The light guide structure includes an anti-leakage light bracket, a second light guide and a third light guide, the LED assembly includes 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, the anti-leakage light bracket, the PCBA and the 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.

4. A low-cost automotive rear combination lamp that is easy to realize automated production according to claim 3, characterized in that: The first light guide is integrally formed with a plurality of first light guide heat-melting pins and a plurality of first pin holes of the bracket, the second light guide is integrally formed with a plurality of second pin holes of the bracket, the third light guide is integrally formed with a plurality of third light guide heat-melting pins, a plurality of third pin holes of the bracket and a plurality of limit pins, the anti-light leakage bracket is integrally formed with a plurality of first light guide pin holes, a plurality of third light guide pin holes and a plurality of fourth pin holes of the bracket, and the fourth pin holes of each bracket are arranged one by one on the outside of the third pin holes of each bracket, and the side of the back cover close to the main bracket is integrally formed with a plurality of back cover positioning pins and A plurality of rear cover hot-melt pins, wherein the main bracket is integrally formed with a first bracket hot-melt pin corresponding to each first pin hole of each bracket, a second bracket hot-melt pin corresponding to each second pin hole of each bracket, a third bracket hot-melt pin corresponding to each third pin hole of each bracket, a bracket positioning hole corresponding to each rear cover positioning pin, and a bracket hot-melt hole corresponding to each rear cover hot-melt pin, and the PCBA is provided with a circuit board pin hole corresponding to each first optical conductive hot-melt pin and a circuit board limit hole corresponding to each limit pin; Some of the first optical thermal melt pins are respectively passed through the corresponding circuit board pin holes and then fixed on the PCBA by hot melt, and the remaining first optical thermal melt pins are respectively passed through the corresponding circuit board pin holes and the first optical guide pin holes in sequence and then fixed on the anti-light leakage bracket by hot melt, and each limit pin is respectively embedded in the corresponding circuit board limit hole, and each third optical thermal melt pin is respectively passed through the corresponding third optical guide pin hole in sequence and then fixed on the anti-light leakage bracket by hot melt; The first hot melt pin of each bracket passes through the corresponding first pin hole of the bracket and is fixed to the first light guide by hot melt. The second hot melt pin of each bracket passes through the corresponding second pin hole of the bracket and is fixed to the second light guide by hot melt. The third hot melt pin of each bracket passes through the corresponding third pin hole of the bracket and the fourth pin hole of the bracket in sequence and is fixed to the anti-light leakage bracket by hot melt. Each rear cover positioning pin is respectively embedded in the corresponding bracket positioning hole, and each rear cover hot-melt pin passes through the corresponding bracket hot-melt hole and is fixed on the main bracket by hot-melt.

5. A low-cost automotive rear combination lamp that is easy to realize automated production according to claim 4, characterized in that: A plurality of mounting buckles are integrally formed on the anti-light leakage bracket, and mounting slots corresponding to the mounting buckles are respectively provided on the PCBA, and the mounting buckles are respectively inserted into the corresponding mounting slots.

6. A low-cost automotive rear combination lamp that is easy to realize automated production according to claim 4, characterized in that: A plurality of light guide limiting ribs are integrally formed on the second light guide, and one side of the outer end of each light guide limiting rib is recessed to form a first limiting snap-in, and the outer edge of the PCBA is recessed to form second limiting snap-in corresponding to each first limiting snap-in, and each first limiting snap-in is respectively engaged with the corresponding second limiting snap-in.

7. The low-cost automotive rear combination lamp that is easy to realize automated production 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; The inner end of the first light-emitting section has a first light-incoming section extending toward the PCBA, and the end of the first light-incoming section away from the first light-emitting section has first light concentrators corresponding to the first LEDs, and the light-emitting end faces of the first LEDs are respectively facing the light-incoming end faces of the corresponding first light concentrators. The inner end of the second light-emitting section has a second light-incoming section extending toward the PCBA, and the end of the second light-incoming section away from the second light-emitting section has second light concentrators corresponding to the second LEDs, and the light-emitting end faces of the second LEDs are respectively facing the light-incoming end faces of the corresponding second light concentrators. The inner end of the third light-emitting section has a third light-incoming section extending toward the PCBA, and the end of the third light-incoming section away from the third light-emitting section has third light concentrators corresponding to the third LEDs, and the light-emitting end faces of the third LEDs are respectively facing the light-incoming end faces of the corresponding third light concentrators. 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.

8. The low-cost automotive rear combination lamp that is easy to realize automated production according to claim 7, characterized in that: The mask comprises a mask body made of light-shielding plastic material, and a first light-transmitting plate, a second light-transmitting plate and a third light-transmitting plate all made of light-transmitting plastic material, the mask body, the first light-transmitting plate, the second light-transmitting plate and the third light-transmitting plate are integrally formed by a multi-color injection molding process, the first light-emitting end face faces the first light-transmitting plate, the second light-emitting end face faces the second light-transmitting plate, and the third light-emitting end face faces the third light-transmitting plate; The outer surface of the third light-transmitting plate is a planar structure, a portion of the inner surface of the third light-transmitting plate is a fog lamp area with a planar structure, and the remaining portion is a retro-reflective area formed with a reflective optical pattern, and the projection of the third light-emitting end face on the third light-transmitting plate is the fog lamp area.

9. The low-cost automotive rear combination lamp that is easy to realize automated production according to claim 1, characterized in that: The PCBA is integrated with a connector, all PIN pins of the connector extend in a direction close to the rear cover, and each PIN pin is inserted into the same PIN positioning block. The rear cover is provided with an installation positioning hole adapted to the PIN positioning block, the PIN positioning block is embedded in the installation positioning hole, and the outer end of each PIN pin extends into the plug-in sheath of the rear cover.

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