A low beam module and vehicle headlight

Abstract

This utility model discloses a low beam module and vehicle lamp, aiming to solve the shortcomings of existing light pattern baffles that suffer from thermal deformation due to high temperatures, resulting in affected light patterns. The utility model includes a PCB with a light source, a reflector, a lens, a lens bracket, a heat sink, and a light pattern baffle. The light pattern baffle is fixedly connected to the lens or PCB, and is located in the light path generated by the light source, creating a cutoff line on the generated light pattern. The light pattern baffle can be connected to the PCB to increase heat dissipation efficiency and reduce thermal deformation, or snap-fitted to other components of the low beam module to improve assembly tolerance. Addressing the thermal deformation of the light pattern baffle by reducing deformation or increasing redundancy, this utility model provides a more stable and reliable low beam module and vehicle lamp.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting, and more specifically, to a low beam module and a vehicle lamp. Background Technology

[0002] The low beam pattern produced by vehicle headlights must have a clear cutoff line to meet the regulations and relevant standards for automotive lighting.

[0003] The headlights use a beam pattern baffle positioned along the light path to block part of the light and create a cutoff line. In existing technology, some beam pattern baffles are integrated with the reflector or positioned using a cantilever. This method, on the one hand, causes thermal deformation of the beam pattern baffle or the cantilever connected to it at high temperatures, leading to changes in the light pattern. On the other hand, it requires a snap-fit ​​structure for the reflector to fit the beam pattern baffle, which is detrimental to the standardization and automated production of the reflector. Another existing solution is an integrated design of the beam pattern baffle and the heat sink. Since the heat sink needs to be sandblasted and polished before being used in the low beam module, this causes the beam pattern baffle to be subjected to continuous friction, resulting in uneven deformation on its surface. Because the design brightness of the low beam stray light has reached a safe threshold, under these critical conditions, deformation of any key component may lead to substandard stray light, affecting the beam pattern. This application aims to improve the heat-induced deformation and process-related deformation of the light pattern baffle, and to provide a more stable and reliable low beam module and vehicle light from the perspective of reducing deformation or increasing redundancy. Utility Model Content

[0004] This invention overcomes the shortcomings of existing low beam modules, which are prone to deformation at high temperatures, resulting in substandard beam patterns. It provides a low beam module and vehicle headlight that can reduce deformation or increase the redundancy angle by adjusting the beam pattern baffle, thus providing a more stable and reliable low beam module and vehicle headlight.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A low beam module includes a PCB with a light source, a reflector, a lens, a lens holder, a heat sink, and a beam pattern baffle. The beam pattern baffle is fixedly connected to the lens or the PCB. The beam pattern baffle is located in the light path generated by the light source and creates a cutoff line on the generated beam pattern by blocking the light. The beam pattern baffle is connected to the heat sink to increase heat dissipation efficiency and reduce thermal deformation, or is snap-fitted to the lens to improve assembly tolerance.

[0007] Compared to conventional low beam modules, this application accelerates the heat dissipation of the beam pattern baffle by adjusting its position and connection method, thereby reducing the temperature of the beam pattern baffle and minimizing its thermal deformation. Alternatively, under the same heat dissipation environment, by interlocking with other components, the gap created by the interlocking absorbs deformation, maintains the position of the beam pattern baffle, and reduces the total deformation.

[0008] Specifically, possible methods include snapping the light pattern baffle to the lens, so that the expansion of the light pattern baffle caused by thermal deformation is absorbed by the snap-fit, thus providing redundancy and reducing deformation. Alternatively, it can be directly bonded to the PCB, transferring heat through thermal conduction between the baffle and the PCB to avoid temperature rise caused by heat accumulation.

[0009] The temperature of the light-patterned baffle is reduced by the aforementioned method, thereby reducing thermal deformation.

[0010] Preferably, the lens is positioned by a lens holder and an external decorative piece. The lens has flanges at both ends in one direction, which rest on corresponding notches in the lens holder, and the external decorative piece is pressed onto the flanges.

[0011] Preferably, the lens has an entrance surface and an exit surface. The entrance surface has a light-shielding area and a light-entry area. A light-pattern baffle is installed in the light-shielding area. The light-pattern baffle has a light-blocking protrusion near the light-shielding area. The light-blocking protrusion is arc-shaped and positioned in the optical path. The light-shielding protrusion blocks part of the light, creating a cutoff line. The light-pattern baffle installed in the light-shielding area does not affect the light entering the lens. The light-pattern baffle forms a cutoff line by blocking light through the light-blocking protrusion.

[0012] Preferably, the light-pattern baffle is provided with a tongue, and the lens is provided with a socket. The tongue is inserted into the socket, and the tongue is provided with a hook. The lens is provided with a locking block, and the hook and locking block are connected by a locking sleeve. This achieves a reliable connection and prevents deformation.

[0013] Preferably, the light-pattern baffle has positioning blocks at both ends of the tongue, and a pad is provided on the lens, with the pad and positioning blocks fitting together. This, together with the hook, sleeve, and pad, forms a three-point positioning system, improving the stability of the light-pattern baffle.

[0014] Preferably, the light-pattern baffle has a first guide hole, and the PCB has a second guide hole. The reflector is press-fitted onto the light-pattern baffle, and the guide post on the reflector is inserted into the first and second guide holes. The light-pattern baffle has a light-blocking protrusion with a rounded edge. The light-blocking protrusion is positioned in the light path, blocking light rays and creating a cutoff line through its edge. After the light-pattern baffle and PCB are pre-positioned, they are positioned by the reflector, which is similar to existing assembly steps and processes.

[0015] Preferably, the light-patterned baffle is made of metal, thereby improving its thermal conductivity.

[0016] Preferably, the light-patterned baffle is bonded to the PCB, with a thermally conductive pad between the baffle and the PCB. This thermally conductive pad is insulating. Bonding increases the contact area, thereby achieving heat dissipation. The thermally conductive pad provides both insulation and heat transfer, further increasing the heat dissipation rate of the light-patterned baffle.

[0017] Preferably, the light-patterned baffle has a flange, through which it fits against the heat sink. By directly contacting the heat sink, the heat dissipation speed of the PCB is increased.

[0018] A vehicle headlight, including the low beam module described above.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] (1) Through the snap-fit ​​method, the deformation of the light baffle is absorbed by the snap-fit ​​method, thereby resisting the influence of deformation;

[0021] (2) By directly attaching to the PCB or heat sink, heat dissipation efficiency is increased and the probability and magnitude of thermal deformation are reduced. Attached Figure Description

[0022] Figure 1 This is an exploded view of Embodiment 1 of this utility model;

[0023] Figure 2 This is an exploded view of the lens and light pattern baffle of this utility model;

[0024] Figure 3 This is a schematic diagram of the lens and light pattern baffle of this utility model;

[0025] Figure 4 This is an exploded view of Embodiment 2 of this utility model;

[0026] Figure 5 This is an exploded view of the present invention from another angle;

[0027] In the picture:

[0028] PCB1, Lens 2, Lens bracket 3, Heat sink 4, Light pattern baffle 5, Light-inlet surface 6, Light-shielding area 7, Light-inlet area 8, Light-blocking protrusion 9, Tongue 10, Socket 11, Hook 12, Clip 13, Pad 14, First guide hole 15, Second guide hole 16, Reflector bowl 17, Flanged edge 18, Guide post 19, Flange 20. Detailed Implementation

[0029] The present disclosure will be further described below with reference to the accompanying drawings and embodiments.

[0030] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only relational terms determined for the convenience of describing the structural relationship of each component or element of the present disclosure and do not specifically refer to any component or element in the present disclosure and should not be construed as a limitation to the present disclosure.

[0033] In the present disclosure, terms such as "fixed connection", "connected", "connected to" should be understood in a broad sense, which may mean a fixed connection, an integral connection or a detachable connection; it may be directly connected or indirectly connected through an intermediate medium. For those skilled in relevant scientific research or technology in this field, the specific meaning of the above terms in the present disclosure can be determined according to specific circumstances and should not be construed as a limitation to the present disclosure.

[0034] Embodiment 1:

[0035] A low-beam module, as shown in reference Figure 1 includes a PCB1 with a light source, a reflector bowl 17, a lens 2, a lens bracket 3, a radiator 4, and a light pattern baffle 5. The PCB1 has a peripheral circuit for supplying power to the LED light source. The reflector bowl 17 is installed together with the PCB1 to converge and correct the light by reflecting the light. The lens 2 is connected to the PCB1 through the lens bracket 3, and there is a set spacing between the lens 2 and the PCB1. The light generated by the light source enters the lens 2 and is refracted and emitted. A second lens 2 can also be provided at one end of the lens bracket 3 away from the PCB1 to further refract the light, but this feature has a relatively low correlation with the technical features of the present application. Therefore, no additional expansion is carried out here. The radiator 4 has fins and a heat dissipation surface. The heat dissipation surface is in contact with the PCB1, and the heat is transferred to the fins through the heat dissipation surface. The fins have a large heat dissipation area and exchange heat with the air flow passing between the two fins through wind hitting or natural air flow.

[0036] As shown in reference Figure 1As shown, a light type baffle 5 is connected to a lens 2. The light type baffle 5 is located on the light path generated by a light source and generates a cut-off line on the generated light type by blocking. The connection between the light type baffle 5 and the lens 2 is a detachable connection. The lens 2 is positioned by a lens bracket 3 and an external decorative part. The lens 2 has flanges 20 at both ends in one direction, and the flanges 20 are placed on corresponding notches of the lens bracket 3, and the external decorative part is press-fitted on the flanges 20.

[0037] Refer to Figure 2 As shown, the lens 2 has a light incident surface 6 and a light exit surface. The light incident surface 6 has a light shielding area 7 and a light incident area 8. The light type baffle 5 is installed at the light shielding area 7. The light type baffle 5 has a light blocking protrusion 9 near the light shielding area 7. The light blocking protrusion 9 is arc-shaped. The light blocking protrusion 9 is arranged on the light path, and the light blocking protrusion blocks part of the light to generate a cut-off line. The light type baffle 5 installed at the light shielding area 7 does not affect the light incident of the lens 2. The light type baffle 5 blocks the light through the light blocking protrusion 9, thereby forming a cut-off line.

[0038] Refer to Figure 3 As shown, the lens 2 is snap-connected to the light type baffle 5. The light type baffle 5 has a tongue 10, and the lens 2 has a socket 11. The tongue 10 is inserted into the socket 11. The tongue 10 has a catch 12, and the lens 2 has a locking block 13. The catch and the locking block 13 are snap-fitted to achieve a reliable connection and absorb deformation. The light type baffle 5 has positioning blocks at both ends of the tongue 10, and the lens 2 has a cushion block 14. The cushion block 14 and the positioning blocks are in contact. Together with the catch and the snap-fitting, and the cushion block 14, three-point positioning is formed to improve the stability of the light type baffle 5. Compared with a conventional low beam module, in this application, by adjusting the position and connection method of the light type baffle 5, deformation is absorbed.

[0039] Specifically, the methods that can be adopted include snap-connecting the light type baffle 5 to the lens 2, so as to absorb deformation by using snap connection. The deformation will be generated in four directions simultaneously through the tongue 11, and the gap between the socket 10 and the tongue 11 can absorb the deformation.

[0040] On this basis, there is also a vehicle headlight, including a low beam module as described above.

[0041] Embodiment 2:

[0042] Refer to Figure 4 As shown, a low beam module includes a PCB 1 with a light source, a reflector 17, a lens 2, a lens bracket 3, a radiator 4 and a light type baffle 5. The light type baffle 5 is fixedly connected to the PCB 1. The light type baffle 5 is located on the light path generated by the light source and generates a cut-off line on the generated light type by blocking. Among them, the light type baffle 5 reduces the surface temperature by a way of increasing the heat dissipation efficiency.

[0043] The light-pattern baffle 5 has a first guide hole 15, and the PCB1 has a second guide hole 16. A reflector bowl 17 is press-fitted onto the light-pattern baffle 5. Guide posts 19 on the reflector bowl 17 are inserted into the first guide hole 15 and the second guide hole 16. The light-pattern baffle 5 has a light-blocking protrusion 9 with a rounded edge. The light-blocking protrusion 9 is positioned in the light path, blocking light and creating a cutoff line through its edge. After pre-positioning, the light-pattern baffle 5 and PCB1 are positioned by the reflector bowl 17, similar to existing assembly steps and processes. The light-pattern baffle 5 is made of metal, thereby improving its thermal conductivity.

[0044] In some embodiments, the light-patterned baffle 5 is bonded to the PCB1, and a thermally conductive pad with insulating properties is provided between the light-patterned baffle 5 and the PCB1. Bonding increases the contact area, thereby achieving heat dissipation. The thermally conductive pad provides both insulation and heat transfer, further increasing the heat dissipation rate of the light-patterned baffle 5.

[0045] In other embodiments, the light-patterned baffle 5 is provided with a flange 18, through which the light-patterned baffle 5 is attached to the heat sink 4. By directly contacting the heat sink 4, the heat dissipation speed of the PCB1 is increased.

[0046] Compared with conventional low beam modules, this application reduces the amount of radiation received by the beam pattern baffle 5 or accelerates the heat dissipation of the beam pattern baffle 5 by adjusting the position and connection method of the beam pattern baffle 5, thereby reducing the temperature of the beam pattern baffle 5 and reducing the thermal deformation of the beam pattern baffle 5.

[0047] The temperature of the light-patterned baffle 5 is reduced by the aforementioned method, thereby reducing thermal deformation.

[0048] A vehicle headlight, including the low beam module described above.

[0049] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A low beam module, characterized in that It includes a PCB with a light source, a reflector bowl, a lens, a lens holder, a heat sink, and a light pattern baffle. The light pattern baffle is snapped to the lens or fixedly connected to the PCB. The light pattern baffle is located in the light path generated by the light source and creates a cutoff line on the generated light pattern by blocking it.

2. The low beam module according to claim 1, characterized in that The lens is positioned by a lens holder and an external decorative piece. The lens has flanges at both ends in one direction. The flanges rest on corresponding notches in the lens holder, and the external decorative piece is pressed onto the flanges.

3. The low beam module according to claim 1, characterized in that The lens has an entrance surface and an exit surface. The entrance surface has a light-shielding area and a light-entry area. A light pattern baffle is installed in the light-shielding area. The light pattern baffle has a light-blocking protrusion near the light-shielding area. The light-blocking protrusion is arc-shaped and is located on the light path. The light-blocking protrusion blocks part of the light to create a cutoff line.

4. The low beam module according to claim 2, characterized in that The light pattern baffle is provided with a tongue, and the lens is provided with a hole. The tongue is inserted into the hole, and the tongue is provided with a hook. The lens is provided with a locking block, and the hook and locking block are connected by a locking sleeve.

5. The low beam module according to claim 4, characterized in that The light-type baffle has positioning blocks at both ends of the tongue, and the lens has pads that fit together with the positioning blocks.

6. The low beam module of claim 1, wherein the light source is a light emitting diode (LED) light source. The light pattern baffle is provided with a first guide hole, and the PCB is provided with a second guide hole. The reflector is press-fitted onto the light pattern baffle. The guide post on the reflector is inserted into the first guide hole and the second guide hole. The light pattern baffle is provided with a light-blocking protrusion. The edge of the light-blocking protrusion is arc-shaped. The light-blocking protrusion is set in the light path. The light-blocking protrusion blocks the light and generates a cutoff line through its edge.

7. The low beam module of claim 1, wherein the light source is a light emitting diode. The light-shaped baffle is made of metal.

8. The low beam module of claim 6, wherein the light source is a light emitting diode. The light pattern baffle is bonded to the PCB, and a thermal pad is placed between the light pattern baffle and the PCB. The thermal pad is insulating.

9. The low beam module of claim 8, wherein the light source is a light emitting diode. The light-shaped baffle has a flange, and the light-shaped baffle is attached to the heat sink through the flange.

10. A vehicle lamp characterized by Includes a low beam module as described in any one of claims 1 to 9.

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