A projection lamp assembly and vehicle

Abstract

The application provides a projection lamp assembly and a vehicle, and belongs to the technical field of vehicle parts, and comprises a circuit board, a side opening is formed in the peripheral wall of a lens barrel module, the area between an illumination lens group and an imaging lens group is a cavity area, a film is located in the cavity area, the side opening is in communication with the cavity area, one side of the film is a light shielding surface, the light shielding surface is provided with a light transmissive pattern, a heat dissipation piece is installed on the other side of the circuit board, a heat conducting piece comprises a first end and a second end, the first end penetrates through the side opening and extends into the cavity area and is in contact with one side of the film, the first end is provided with a light transmissive hole, the second end is located outside the lens barrel module and is in direct contact with the heat dissipation piece or the circuit board, the thermal conductivity of the heat conducting piece is greater than that of the lens barrel module, and the beneficial effects of the application are that the heat conducting piece can conduct the heat of the film and the area where the film is located out of the lens barrel module, local temperature rise of the film and the area where the film is located is avoided, and the lenses in the vicinity are protected.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle parts and relates to a projection lamp assembly and a vehicle. Background Art

[0002] A car projector light (also known as a welcome light) is a device that projects personalized images (such as brand logos, geometric shapes, or text) onto the ground. It works by using LEDs to illuminate film, magnifying the image through an imaging lens and projecting it onto the ground.

[0003] Lenses are typically coated with an antireflection coating, which carries the risk of cracking in high-temperature environments. The focusing effect of the illumination lens assembly can cause localized heating of the film. Due to processing difficulties and cost, the lens barrels of automotive projector lamps are typically made of plastic rather than metal. However, plastic lens barrels have poor heat dissipation, leading to internal heat accumulation. Heat in the film cannot be dissipated promptly, affecting nearby lenses and damaging the antireflection coating on the lens surfaces. This can cause defects such as blurred projection patterns and increased background light throughout the pattern. Summary of the Invention

[0004] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to provide a projection lamp assembly and a vehicle.

[0005] The object of the present invention can be achieved through the following technical solutions: A projection lamp assembly, comprising:

[0006] A circuit board, a light source being mounted on one side of the circuit board;

[0007] A projection module, comprising a barrel module and an illumination lens group, a film, and an imaging lens group arranged in sequence along the optical axis of the light source within the barrel module; a side opening is provided on a peripheral wall of the barrel module; an area between the illumination lens group and the imaging lens group forms a cavity area; the film is located in the cavity area; and the side opening is connected to the cavity area; one side of the film is a light-shielding surface having a light-transmitting pattern thereon.

[0008] a heat sink mounted on the other side of the circuit board;

[0009] a heat conducting member, the heat conducting member comprising a first end and a second end;

[0010] The first end extends into the cavity region through the side opening and contacts one side of the film sheet, the first end has a light transmission hole, the light transmission hole corresponds to the position of the light transmission pattern and the size of the light transmission hole is greater than the size of the light transmission pattern; the second end is located outside the lens barrel module and directly contacts the heat dissipation member or the circuit board;

[0011] The thermal conductivity of the heat conduction member is greater than the thermal conductivity of the lens barrel module.

[0012] Preferably, the lens barrel module comprises a lower lens barrel and an upper lens barrel, the illumination lens group is installed in the lower lens barrel, the imaging lens group is installed in the upper lens barrel, the upper lens barrel is detachably connected with the lower lens barrel; the side opening is arranged on the peripheral wall of the lower lens barrel, the port of the lower lens barrel is provided with internal threads, the outer peripheral surface of the upper lens barrel is provided with external threads, the upper lens barrel is located in the port of the lower lens barrel and the two are threadedly connected.

[0013] Preferably, the first end is arranged between the imaging lens group and the film sheet, the first end further has a first clamping groove, the film sheet is embedded in the first clamping groove, and the groove wall of the first clamping groove contacts the outer edge surface of the film sheet.

[0014] Preferably, the first end further has a plurality of first posts, and the illumination lens group contacts the heat conduction member through the first posts.

[0015] Preferably, the heat conduction member is a sheet formed by stamping and bending, the first end is arranged between the illumination lens group and the film sheet; the lens barrel module comprises a support portion for placing the film sheet, the support portion has a second clamping groove, and the film sheet is embedded in the second clamping groove.

[0016] Preferably, the illumination lens group near the film sheet has a plurality of second posts, and the illumination lens group contacts the heat conduction member through the second posts.

[0017] Preferably, the peripheral wall of the lens barrel module further has a connecting groove, and part of the first end extends into the connecting groove, so that the heat conduction member is axially fixed with the lens barrel module.

[0018] The support portion further has a plurality of third posts.

[0019] The first end further has a plurality of avoiding holes for avoiding the third posts, the thickness of the heat conduction member is less than the height of the third posts, and the illumination lens group contacts the support portion through the third posts.

[0020] Preferably, the surface of the first end has a black light-shielding layer, and the size of the light-transmitting hole is larger than the size of the light-transmitting pattern and smaller than the size of the light spot formed by the light source on the film.

[0021] Preferably, the lens barrel module is configured as a plastic component, and the heat conducting component is configured as a metal component.

[0022] A vehicle comprises the projection lamp assembly.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The heat dissipation efficiency inside the lens barrel module is significantly improved, effectively reducing the operating temperature of the film. The temperature rise of the illumination lens group and the imaging lens group is further controlled, avoiding adverse phenomena such as film cracking of the anti-reflection film on the lens surface due to high temperature, thereby ensuring the stability and service life of the optical system.

[0025] 2. The thermal conductor not only conducts heat but also serves as a mounting bracket for the film. The first clamping groove can realize precise physical positioning of the film and the first end of the thermal conductor, while increasing the contact area between the two, thereby improving the thermal conductivity efficiency.

[0026] 3. Since the first end is axially fixed to the lens barrel module (bracket) through the connecting groove, a stable distance can be maintained between the first end and the illumination lens assembly, effectively avoiding direct contact between the two and causing the temperature of the illumination lens assembly to rise, thereby ensuring its working stability.

[0027] 4. The first end of the heat conductor is positioned in front of the film, blocking some light that doesn't pass through the light-transmitting pattern. This reduces the film's light absorption, effectively lowering the temperature of the film itself and the surrounding lenses. Furthermore, the heat conductor absorbs any light spillage from the edges through the light-shielding layer, directly conducting this heat away, further improving thermal conductivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural exploded view of the projection module of the present invention.

[0029] Figure 2 2 is a structural exploded view of the heat conducting member and the lens barrel module of the present invention.

[0030] Figure 3 Schematic diagram of the structure of the heat conducting member in the first embodiment of the present invention.

[0031] Figure 4 It is a structural schematic diagram of the projection lamp assembly of the present invention.

[0032] Figure 5 Schematic diagram of the connection relationship between the projection module and the heat conducting element according to the first embodiment of the present invention.

[0033] Figure 6 Schematic diagram of the connection relationship between the projection module and the heat conducting element according to the third embodiment of the present invention.

[0034] Figure 7 Schematic diagram of the connection relationship between the projection module and the heat conducting element according to the fourth embodiment of the present invention.

[0035] Figure 8 This is a schematic diagram of the structure of a projection lamp in the prior art.

[0036] In the figure, 100, circuit board; 110, light source; 200, lens barrel module; 210, lower lens barrel; 220, upper lens barrel; 230, side opening; 240, bracket part; 241, second snap-fit ​​groove; 242, third top column; 250, connecting groove; 300, illumination lens group; 310, second top column; 400, film; 500, imaging lens group; 600, heat sink; 700, heat conductor; 710, first end; 711, light-transmitting hole; 712, first snap-fit ​​groove; 713, first top column; 720, second end. DETAILED DESCRIPTION

[0037] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0038] like Figures 1 to 7 As shown, a projection lamp assembly includes: a circuit board 100, a light source 110 is mounted on one side of the circuit board 100; a projection module, the projection module including a barrel module 200 and an illumination lens group 300, a film 400, and an imaging lens group 500 arranged in sequence along the optical axis of the light source 110 within the barrel module 200; a side opening 230 is opened on the peripheral wall of the barrel module 200, the area between the illumination lens group 300 and the imaging lens group 500 is a cavity area, the film 400 is located in the cavity area, and the side opening 230 is connected to the cavity area; one side of the film 400 is a light-shielding surface, and the light-shielding surface has a light-transmitting pattern. ; Heat sink 600, heat sink 600 is mounted on the other side of circuit board 100; thermal conductor 700, thermal conductor 700 includes a first end 710 and a second end 720; the first end 710 extends into the cavity area through the side opening 230 and contacts one side of the film 400, the first end 710 has a light-transmitting hole 711, the position of the light-transmitting hole 711 corresponds to the position of the light-transmitting pattern and the size of the light-transmitting hole 711 is larger than the size of the light-transmitting pattern; the second end 720 is located outside the lens barrel module 200 and is in direct contact with the heat sink 600 or the circuit board 100; the thermal conductivity of the thermal conductor 700 is greater than the thermal conductivity of the lens barrel module 200.

[0039] There are two main sources of heat for the projection lamp assembly. One is the heat generated by the light source. Electrical energy is converted into light energy and heat energy. Since the light source is in direct contact with the circuit board, this heat can be dissipated through the circuit board and the heat sink. The other is that light is focused by the lighting lens group and irradiated on the film to form a light spot. Only a part of the film is a light-transmitting area, and the rest are opaque areas. The opaque areas block the light while absorbing it and generating heat, converting light energy into heat energy. Due to reasons such as processing accuracy, difficulty, and cost, the lens barrel module is usually made of plastic materials that can be injection molded, rather than metal materials that need to be formed through complex cutting processes. However, plastic materials have lower thermal conductivity than metal materials, which means that the heat in the lens barrel module is difficult to dissipate to the outside through the lens barrel module. Figure 8 As shown, the light generated by the light source passes through the illumination lens group and is emitted to the film. The black light-shielding surface on the film absorbs light and generates heat, causing the temperature of the film and the cavity area to rise, which in turn affects the illumination lens group and the imaging lens group and damages the anti-reflection film on the lens surface.

[0040] like Figures 1 to 7 As shown, this projection lamp assembly incorporates a heat conductor 700 made of a high-thermal-conductivity material (such as metal). The heat conductor 700 extends through the wall of the lens barrel module 200. Its first end 710 extends into the cavity area and contacts the film 400 (i.e., a high-temperature hotspot), while its second end 720 contacts the circuit board 100 or the heat sink 600 (i.e., a high-efficiency heat dissipation node). This structure establishes an efficient heat conduction path between the film 400 and the circuit board 100 or heat sink 600. Heat from the film 400 and the cavity area is rapidly transferred through the first end 710 of the heat conductor 700 to the second end 720, ultimately dissipating efficiently to the outside environment via the circuit board 100 or the heat sink 600. The present invention significantly improves the efficiency of heat extraction from the barrel module 200, effectively reduces the operating temperature of the film 400, and further controls the temperature rise of the illumination lens group 300 and the imaging lens group 500, thereby avoiding adverse phenomena such as film cracking of the antireflection film on the lens surface due to high temperature, thereby ensuring the stability and service life of the optical system.

[0041] It should be additionally explained here that the light-transmitting hole 711 on the first end 710 is to ensure that the first end 710 does not block the light-transmitting pattern, so that the projected light can pass through the light-transmitting pattern without hindrance.

[0042] Based on the above embodiment, the lens barrel module 200 includes a lower lens barrel 210 and an upper lens barrel 220, the illumination lens group 300 is installed in the lower lens barrel 210, the imaging lens group 500 is installed in the upper lens barrel 220, and the upper lens barrel 220 and the lower lens barrel 210 are detachably connected; the side opening 230 is provided on the peripheral wall of the lower lens barrel 210, the port of the lower lens barrel 210 is provided with an internal thread, and the outer peripheral surface of the upper lens barrel 220 is provided with an external thread, the upper lens barrel 220 is located in the port of the lower lens barrel 210 and the two are threadedly connected.

[0043] The lens barrel module 200 is designed as a detachable structure. The lower lens barrel 210 is used to support the illumination lens assembly 300 and film 400, and the upper lens barrel 220 is used to support the imaging lens assembly 500. The lower lens barrel 210 and the upper lens barrel 220 can be manufactured separately, facilitating the assembly of their internal optical components and reducing overall manufacturing complexity. During assembly, the upper lens barrel 220 and the lower lens barrel 210 are connected together via threads, so that the illumination lens assembly 300, film 400, and imaging lens assembly 500 are arranged in sequence along the optical axis of the light source 110.

[0044] Example 1:

[0045] like Figures 1 to 5 As shown, the first end 710 of the heat conductor 700 is arranged between the imaging lens group 500 and the film 400. The first end 710 also has a first snap-in groove 712. The film 400 is embedded in the first snap-in groove 712. The groove wall of the first snap-in groove 712 contacts the outer edge surface of the film 400.

[0046] In the first embodiment, the surface of the first end 710 contacts the rear surface of the film sheet 400, and the film sheet 400 is positioned and connected via a first engaging groove 712 provided on the thermal conductive member 700. The thermal conductive member 700 not only conducts heat but also serves as a mounting bracket for the film sheet 400. The first engaging groove 712 allows for precise physical positioning of the film sheet 400 and the first end 710 of the thermal conductive member 700, while also increasing the contact area between the two, thereby improving thermal conductivity.

[0047] Based on the first embodiment, the first end 710 of the heat conductor 700 further has a plurality of first top posts 713. The illumination lens assembly 300 contacts the heat conductor 700 via the first top posts 713. The heat conductor 700 abuts against the illumination lens assembly 300 via the first top posts 713, ensuring that a sufficient distance is maintained between the heat conductor 700 and the illumination lens assembly 300 to prevent heat from the heat conductor 700 from being transferred to the illumination lens assembly 300, causing the temperature to rise.

[0048] Example 2:

[0049] like Figure 1 、 Figure 4 、 Figure 6 、 Figure 7 As shown, the heat conductor 700 is formed by stamping and bending a sheet of material, and the first end 710 of the heat conductor 700 is arranged between the illumination lens group 300 and the film 400; the lens barrel module 200 also includes a bracket portion 240 for placing the film 400, and the bracket portion 240 has a second snap-in groove 241, and the film 400 is embedded in the second snap-in groove 241.

[0050] In the second embodiment, the surface of the first end 710 contacts the front surface of the film 400. The thermal conductive member 700 does not serve as a mounting bracket for the film 400. Instead, the film 400 is secured to the second engaging groove 241 within the lens barrel module 200. The thermal conductive member 700 has excellent elasticity, relying on its own elastic force to tightly fit the first end 710 against the film 400 while simultaneously keeping the second end 720 in close contact with the heat sink 600 or circuit board 100, thereby improving thermal conductivity efficiency and reliability.

[0051] Compared to the heat conductor 700 in Example 1, which also serves as a film support, the heat conductor 700 in this embodiment is formed from a sheet of material through stamping and bending, resulting in a simpler structure and lower manufacturing costs. It should be noted that Example 2 is suitable for structures with a large gap between the lighting lens assembly 300 and the film 400. If the gap is smaller, the lighting lens assembly 300 will easily come into direct contact with the heat conductor 700, causing heat from the heat conductor 700 to be directly transferred to the lighting lens assembly 300, causing it to increase in temperature.

[0052] Example 3:

[0053] like Figure 1 、 Figure 4 、 Figure 6 As shown, based on the second embodiment, a plurality of second top columns 310 are provided on the illumination lens of the illumination lens assembly 300 adjacent to the film 400 , and the illumination lens assembly 300 is in contact with the heat conducting member 700 via the second top columns 310 .

[0054] In the third embodiment, the second top column 310 on the lighting lens group 300 abuts against the surface of the heat conductor 700, so that a certain distance is maintained between the two, thereby preventing the heat conductor 700 from directly contacting the lighting lens group 300 over a large area, thereby preventing the temperature of the lighting lens group 300 from rising, and helping to maintain its working stability.

[0055] Example 4:

[0056] like Figure 1 、 Figure 4 、 Figure 7As shown, on the basis of the second embodiment, a connecting groove 250 is further provided on the peripheral wall of the lens barrel module 200, and a portion of the first end 710 extends into the connecting groove 250, so that the heat conducting member 700 and the lens barrel module 200 are axially fixed; the bracket portion 240 is further provided with a plurality of third top columns 242; the first end 710 of the heat conducting member 700 is further provided with a plurality of avoidance holes for avoiding the third top columns 242, and the thickness of the heat conducting member 700 is less than the height of the third top columns 242; the illumination lens group 300 is in contact with the bracket portion 240 through the third top columns 242.

[0057] In the fourth embodiment, the inner wall of the lens barrel module 200 is provided with a slot-like connecting groove 250. The first end 710 of the heat conducting member 700 is inserted into this connecting groove 250, thereby achieving axial fixation with the lens barrel module 200. A third top post 242 is provided on the bracket portion 240. The third top post 242 passes through the first end 710 of the heat conducting member 700 through an avoidance hole and abuts against the illumination lens assembly 300, maintaining a certain distance between the illumination lens assembly 300 and the bracket portion 240. Because the first end 710 is axially fixed to the lens barrel module 200 (the bracket portion 240) via the connecting groove 250, a stable distance is maintained between the first end 710 and the illumination lens assembly 300. Compared to the third embodiment, the direct contact area between the first end 710 and the illumination lens assembly 300 is further reduced, preventing temperature increases in the illumination lens assembly 300 and thus ensuring its operational stability.

[0058] like Figure 1 、 Figure 6 、 Figure 7 As shown, based on the second embodiment, the surface of the first end 710 of the heat conducting member 700 has a black light shielding layer, and the size of the light-transmitting hole 711 is larger than the size of the light-transmitting pattern and smaller than the size of the light spot formed by the light source 110 on the film 400.

[0059] The first end 710 of the heat conductor 700 is positioned in front of the film 400, shielding some light that doesn't pass through the light-transmitting pattern. This reduces light absorption by the film 400 and effectively lowers the temperature of the film 400 and surrounding lenses. Furthermore, the heat conductor 700 directly absorbs light spillage from the edges through the light-shielding layer, thereby directly conducting this heat away, further improving thermal conductivity.

[0060] like Figures 1 to 7 As shown, based on the above embodiment, the lens barrel module 200 is configured as a plastic component, and the heat conducting component 700 is configured as a metal component.

[0061] like Figures 1 to 7 As shown, based on the above embodiment, a vehicle includes a projection lamp assembly.

[0062] The vehicle's projection lamp assembly can project a designed pattern or text onto the ground. The heat conductor 700 effectively reduces the temperature of the film 400 and lens, ensuring the integrity of the optical components (particularly the anti-reflection coating), thereby maintaining high-quality, high-definition projection effects over extended periods of operation. Furthermore, the efficient heat dissipation design eliminates the risk of lens deformation and film cracking due to heat, thereby increasing the reliability and service life of the projection lamp.

[0063] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship and movement status of various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0064] In addition, terms such as "first," "second," and "an" in the present invention are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly specified and limited.

[0066] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A projection lamp assembly, characterized in that: include: A circuit board (100), wherein a light source (110) is mounted on one side of the circuit board (100); A projection module, comprising a lens barrel module (200) and an illumination lens group (300), a film (400) and an imaging lens group (500) arranged in sequence along the optical axis direction of the light source (110) in the lens barrel module (200); a side opening (230) is provided on a peripheral wall of the lens barrel module (200); an area between the illumination lens group (300) and the imaging lens group (500) is a cavity area; the film (400) is located in the cavity area; the side opening (230) is connected to the cavity area; one side of the film (400) is a light-shielding surface, and a light-transmitting pattern is provided on the light-shielding surface; a heat sink (600), the heat sink (600) being mounted on the other side of the circuit board (100); A heat conducting member (700), the heat conducting member (700) comprising a first end (710) and a second end (720); The first end (710) extends through the side opening (230) into the cavity area and contacts one side of the film (400); the first end (710) has a light-transmitting hole (711); the position of the light-transmitting hole (711) corresponds to the position of the light-transmitting pattern, and the size of the light-transmitting hole (711) is larger than the size of the light-transmitting pattern; the second end (720) is located outside the lens barrel module (200) and is in direct contact with the heat sink (600) or the circuit board (100); The thermal conductivity of the heat conducting member (700) is greater than the thermal conductivity of the lens barrel module (200).

2. The projection lamp assembly according to claim 1, wherein: The lens barrel module (200) comprises a lower lens barrel (210) and an upper lens barrel (220), the illumination lens group (300) is installed in the lower lens barrel (210), the imaging lens group (500) is installed in the upper lens barrel (220), and the upper lens barrel (220) and the lower lens barrel (210) are detachably connected; the side opening (230) is provided on the peripheral wall of the lower lens barrel (210), the port of the lower lens barrel (210) is provided with an internal thread, and the outer peripheral surface of the upper lens barrel (220) is provided with an external thread, the upper lens barrel (220) is located in the port of the lower lens barrel (210), and the two are threadedly connected.

3. The projection lamp assembly according to claim 1, wherein: The first end (710) is arranged between the imaging lens group (500) and the film (400), and the first end (710) also has a first snap-fit ​​groove (712). The film (400) is embedded in the first snap-fit ​​groove (712), and the groove wall of the first snap-fit ​​groove (712) contacts the outer edge surface of the film (400).

4. The projection lamp assembly according to claim 3, wherein: The first end (710) also has a plurality of first top columns (713), and the lighting lens group (300) is in contact with the heat conducting member (700) through the first top columns (713).

5. The projection lamp assembly according to claim 1, wherein: The heat conducting member (700) is formed by stamping and bending a sheet material, and the first end (710) is arranged between the illumination lens group (300) and the film sheet (400); the lens barrel module (200) includes a bracket portion (240) for placing the film sheet (400), the bracket portion (240) has a second clamping groove (241), and the film sheet (400) is embedded in the second clamping groove (241).

6. The projection lamp assembly according to claim 5, wherein: A plurality of second top columns (310) are provided on the lighting lens in the lighting lens group (300) adjacent to the film (400), and the lighting lens group (300) is in contact with the heat conducting member (700) via the second top columns (310).

7. The projection lamp assembly according to claim 5, wherein: A connecting groove (250) is provided on the peripheral wall of the lens barrel module (200), and a portion of the first end (710) extends into the connecting groove (250), so that the heat conducting member (700) and the lens barrel module (200) are axially fixed; The bracket portion (240) is further provided with a plurality of third top columns (242); The first end (710) is also provided with a plurality of avoidance holes for avoiding the third top column (242); the thickness of the heat conducting member (700) is smaller than the height of the third top column (242); and the lighting lens assembly (300) is in contact with the bracket portion (240) through the third top column (242).

8. The projection lamp assembly according to claim 5, wherein: The surface of the first end (710) has a black light-shielding layer, and the size of the light-transmitting hole (711) is larger than the size of the light-transmitting pattern and smaller than the size of the light spot formed by the light source (110) on the film (400).

9. The projection lamp assembly according to claim 1, wherein: The lens barrel module (200) is configured as a plastic part, and the heat conducting part (700) is configured as a metal part.

10. A vehicle, characterized in that: The invention comprises a projection lamp assembly as claimed in any one of claims 1 to 9.

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