Automobile LED Headlight Structure
The compact automotive LED headlight structure addresses the bulkiness and limited heat dissipation of conventional designs by integrating a heat-conducting member and a rotatable fan within the housing, enhancing both heat dissipation efficiency and compactness for wider vehicle applicability.
Patent Information
- Application Number
- JP2024600011U
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Priority Date
- 2023-04-17
- Filing Date
- 2023-06-07
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2033-06-07
AI Technical Summary
Conventional automotive LED headlights are bulky, making them unsuitable for vehicles with limited space structures, and their heat dissipation efficiency is limited due to the external placement of the heat dissipation fan.
The LED headlight structure incorporates a housing with a substrate-mounted LED chip, a heat-conducting heat dissipation member, and a rotatable heat dissipation fan. The heat dissipation member is positioned between the heat dissipation fan and the LED chip, and heat dissipation grooves on the housing enhance heat conduction and airflow for efficient cooling.
This design significantly improves heat dissipation efficiency and reduces the overall volume of the headlight, making it more compact and applicable to various vehicle models while ensuring safe and stable operation.
Smart Images
Figure 0003251728000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a lamp, and particularly to an automobile headlight structure.
Background Art
[0002] With the continuous development of LED technology and automotive systems, as automotive headlights, the use of LED lamps is increasingly replacing conventional xenon lamps. Conventional automotive LED headlights include a front housing and a rear housing. The front housing is attached with a copper substrate and an LED chip attached to the copper substrate, and the rear housing is attached with heat dissipation fins, a heat dissipation fan, and a drive system. A large amount of heat generated when the LED chip generates heat is transmitted to the copper substrate and the heat dissipation fins, and the fan blows air to the heat dissipation fins for heat dissipation. Compared with conventional xenon lamps, automotive LED headlights have advantages such as stable operation, energy saving, and environmental friendliness, but there is a problem that their volume is relatively large and they may not be attached to vehicle models with limited space structures. Alternatively, there is a problem that steering becomes difficult after being connected to a converter of an automotive circuit system. Also, when the drive system uses an external design, it not only increases the volume of the lamp, but also requires a separate arrangement of connection lines with the heat dissipation fan, which not only limits the space and circuit layout, but also affects the aesthetics of the lamp. Furthermore, the heat dissipation fan mainly acts on the heat dissipation fins and cannot act on other components, so its heat dissipation efficiency is limited.
Summary of the Invention
Problems to be Solved by the Invention
[0003] An object of the present invention is to provide a compact automotive LED headlight structure in order to improve applicability, meet the usage needs of various vehicle models, improve heat dissipation efficiency, and better ensure the safety of operation.
Means for Solving the Problems
[0004] The LED headlight structure of a motor vehicle according to the present invention includes a housing, a substrate mounted in the housing and to which an LED chip is attached, a heat-conducting heat dissipation member, and a rotatable heat dissipation fan. A cavity is provided in the housing, the heat dissipation fan is mounted in the cavity, heat dissipation grooves are provided on the outer wall of the housing between the heat dissipation fan and the LED chip, and the heat dissipation member is mounted in the heat dissipation grooves and contacts the substrate.
[0005] Furthermore, the housing includes an LED chip segment, a heat dissipation segment, and a connection segment provided in sequence. The heat dissipation fan is mounted in the connection segment, the heat dissipation grooves are provided in the heat dissipation segment, the LED chip segment is straight, and LED chip holes for exposing the LED chips are formed.
[0006] Furthermore, the inner diameter of the inner wall of the connection segment is larger than the inner diameter of the inner wall of the heat dissipation segment.
[0007] A fan mounting groove is provided on the inner wall of the end of the heat dissipation segment opposite to the LED chip. A fan mounting plate is fixedly mounted in the fan mounting groove, and the rotation shaft of the heat dissipation fan is mounted on the fan mounting plate.
[0008] Furthermore, a notch is provided on the LED chip side of the heat dissipation groove of the housing.
[0009] Furthermore, the heat dissipation member includes a heat dissipation bottom plate that contacts the substrate and a plurality of heat dissipation fins provided perpendicularly to the outer surface of the heat dissipation bottom plate. The outer surface of the heat dissipation bottom plate is provided in the plane where the bottom surface of the notch of the heat dissipation groove is located or on the substrate side of the plane.
[0010] Furthermore, an adapter connected to the vehicle system is mounted at the end of the housing opposite to the LED chip. The adapter has an opening on the LED chip side and a receiving cavity recessed inward. The circuit board is fixedly mounted in the receiving cavity, and the end of the substrate extends into the receiving cavity and is connected to the circuit board.
[0011] Furthermore, at the location where the substrate and the heat dissipation fan face each other, a relief hole for passing the heat dissipation fan is formed.
[0012] Furthermore, ventilation holes communicating with the accommodation cavity are formed in the adapter.
[0013] Furthermore, the exhaust port of the heat dissipation fan is provided toward the heat dissipation member.
Advantages of the Invention
[0014] In the LED headlight structure of an automobile according to the present invention, both a substrate to which an LED chip is attached and a radiator fan are attached inside a housing. An LED chip hole capable of exposing the LED chip is formed at a position facing the LED chip of the housing. A heat dissipation member for conducting heat is attached to a heat dissipation groove on the outer wall of the housing, and the heat dissipation member is in contact with the substrate to ensure heat conduction. When the LED headlight of the automobile operates, the adapter drives the LED chip and the radiator fan to operate by means of a circuit board under the drive of the automobile system. A large amount of heat is generated by the light emission of the LED chip. Part of this large amount of heat is retained by the LED chip, part is conducted to the substrate, then conducted from the substrate to the heat dissipation member, and a small amount of heat is also conducted to the housing, resulting in different degrees of temperature rise in each component. Also, during the process of the radiator fan rotating, it moves air to form cooling air. After the cooling air enters from the adapter and cools down the circuit board, it is blown onto the inside of the housing and the substrate, then onto the heat dissipation member. After that, part of the cooling air continues to be blown from the inside of the housing onto the end of the substrate and the LED chip, and the other part is blown from the outside of the housing through the heat dissipation groove and the notch above it onto the LED chip, thereby cooling and dissipating heat from all components. The effects of such an LED headlight structure of an automobile are as follows. The utilization rate of the cooling air and the heat dissipation efficiency can be significantly improved. In this case, the volume of the heat dissipation member and the radiator fan can be appropriately reduced, so that the radiator fan can be installed inside the housing instead of being installed outside the end of the housing of a conventional automobile LED headlight. Thereby, the overall volume of the automobile LED headlight can be significantly reduced. Also, the heat dissipation member of a conventional automobile LED headlight can similarly be provided outside the end of the housing, but this position is also the mounting opening of the light housing of the automobile to which the automobile LED headlight is mounted. Since the space of the mounting opening of the automobile light housing is extremely limited, it becomes difficult to mount the LED headlight.In the LED headlight structure of an automobile according to the present invention, a heat dissipation member is provided between the heat dissipation fan and the LED chip, that is, it is located inside the mounting opening of the headlight housing of the automobile. This position has a wider mounting space and does not block the light rays generated from the LED chip. Thereby, by setting the position of the heat dissipation member, the structure of the LED headlight of the automobile can be made more compact, the mounting space inside the headlight housing of the automobile can be utilized more effectively, and further, the volume of the end portion of the LED headlight of the automobile can be reduced, and more mounting space can be secured by the converter of the automobile circuit system. Such an LED headlight structure of an automobile can effectively meet the usage needs of various vehicle types and has extremely wide applicability.
Brief Description of the Drawings
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Best Mode for Carrying Out the Invention
[0016] Hereinafter, with reference to the drawings, the technical means in the embodiments of the present invention will be clearly and completely described. The embodiments described below are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained on the premise that those skilled in the art do not need to perform creative labor all belong to the protection scope of the present invention.
[0017] In addition, in the embodiments of the present invention, when direction indications (for example, up, down, left, right, front, back, top, bottom, inside, outside, vertical direction, horizontal direction, longitudinal direction, counterclockwise, clockwise, circumferential direction, radial direction, axial direction, etc.) are included, the said direction indications are only for explaining the relative positional relationship, movement state, etc. between each member in a specific posture (as shown in the drawings). When the specific posture changes, the said direction indications also change accordingly.
[0018] In the embodiments of the present invention, when there is an explanation regarding "first" or "second", etc., the explanations such as "first" or "second" are only used for the purpose of explanation, and it should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Thus, the features limited by "first" and "second" may explicitly or implicitly include at least one of the said features. Also, the technical means between each embodiment can be combined with each other, but it must be based on what those skilled in the art can achieve. When the combination of technical means conflicts with each other or cannot be realized, such a combination of technical means does not exist and should be considered not to be within the protection scope required by the present invention.
[0019] The present invention provides an LED headlight structure for an automobile.
[0020] In an embodiment of the present invention, the LED headlight structure of an automobile includes a housing 1, a substrate 3 mounted in the housing and having an LED chip 2 mounted thereon, a heat-conducting heat dissipation member 4, and a rotatable heat dissipation fan 5. A cavity 11 is provided in the housing, the heat dissipation fan is mounted in the cavity, a heat dissipation groove 12 is provided on the outer wall of the housing between the heat dissipation fan and the LED chip, and the heat dissipation member is mounted in the heat dissipation groove and contacts the substrate.
[0021] As shown in FIGS. 1 to 11, both the substrate with the LED chip mounted thereon and the heat dissipation fan are mounted in the housing. An LED chip hole through which the LED chip can be exposed is formed at a location of the housing facing the LED chip. The heat-conducting heat dissipation member is mounted in the heat dissipation groove on the outer wall of the housing, and the heat dissipation member contacts the substrate to ensure heat conduction. When the LED headlight of the automobile operates, a large amount of heat is generated due to the light emission of the LED chip. A part of this large amount of heat is retained by the LED chip, a part is conducted to the substrate, then conducted from the substrate to the heat dissipation member, and a small amount of heat is also conducted to the housing, resulting in different degrees of temperature rise in the LED chip, substrate, heat dissipation member, and housing. At this time, during the rotation process of the heat dissipation fan, air is moved to form cooling air, and the cooling air flows through the inner wall of the housing, the substrate, the heat dissipation member, and the LED chip to dissipate heat from all components.
[0022] The housing 1 may be integrally provided, or may include two housing pieces 10 provided opposite to each other as shown in FIGS. 4 to 7. The opposite sides of the two housing pieces are recessed, and the substrate 3 and the heat dissipation fan 5 are attached between the two housing pieces, thereby facilitating the attachment of each component. Also, when viewed along the axial direction, the housing 1 includes an LED chip segment 13, a heat dissipation segment 14, and a connection segment 15 provided in sequence. The heat dissipation fan 5 is attached within the connection segment, the heat dissipation groove is provided in the heat dissipation segment, the LED chip segment is straight, and an LED chip hole 16 for exposing the LED chip 2 is formed, whereby the cooling air can flow smoothly between the heat dissipation member and the LED chip, smoothly cooling a plurality of components, and further improving the utilization rate of the cooling air and the heat dissipation efficiency. Also, by providing a notch 17 on the LED chip 2 side of the heat dissipation groove 12 of the housing 1, the cooling air can flow more smoothly and intensively between the heat dissipation member and the LED chip, avoiding a large amount of air volume loss due to the shielding of the housing. Also, by making the diameter of the inner wall of the connection segment 15 larger than the diameter of the inner wall of the heat dissipation segment 14, the size of the fan and the air volume due to its operation can be appropriately increased, better satisfying the heat dissipation needs. Further, as shown in FIGS. 6, 10, and 11, a fan mounting groove 18 is provided on the inner wall of the end portion of the heat dissipation segment 14 opposite to the LED chip 2, a fan mounting plate 51 is fixedly attached within the fan mounting groove, and the rotating shaft of the heat dissipation fan 5 is attached to the fan mounting plate, thereby more fully and effectively utilizing the layout space within the housing, satisfying the mounting needs of the heat dissipation member, increasing the size of the heat dissipation fan, and also providing sufficient rotation space for the heat dissipation fan.
[0023] In the LED headlight structure of the automobile, the heat dissipation member may be manufactured, for example, from an aluminum material and may be integrally formed with the housing or may be detachably attached to the housing. Further, the shape of the heat dissipation member may be set to various shapes such as a square shape or a corrugated shape. Also, as shown in FIG. 9, the heat dissipation member includes a heat dissipation bottom plate 41 that contacts the substrate 3 and a plurality of heat dissipation fins 42 provided perpendicular to the outer surface of the heat dissipation bottom plate. By using the gaps between the heat dissipation fins, the heat dissipation area can be increased and it can be ensured that the cooling air flows smoothly. Further, with regard to the thickness of the heat dissipation bottom plate, by providing the outer surface of the heat dissipation bottom plate 41 within the plane where the bottom surface of the notch 17 of the heat dissipation groove is located or on the substrate 3 side of the plane, the heat dissipation bottom plate can be prevented from protruding from the notch, and shielding against the cooling air blown onto the LED chip can be avoided.
[0024] As shown in FIGS. 1 to 5, an adapter 6 connected to an automotive system is attached to the end of the housing 1 opposite to the LED chip 2. The adapter has an opening on the LED chip side and is provided with a receiving cavity recessed inward. The circuit board 7 is fixedly attached within the receiving cavity. The end of the substrate 3 extends into the receiving cavity and is connected to the circuit board, thereby meeting the needs of the circuit layout. Also, as shown in FIGS. 3, 4, and 8, escape holes 31 for passing the heat dissipation fan 5 are formed at the opposing locations between the substrate 3 and the heat dissipation fan 5, thereby meeting the mounting needs of the heat dissipation fan, increasing the contact area between the cooling air and the substrate, allowing the cooling air to flow better over the substrate, and improving the heat dissipation efficiency. Further, as shown in FIG. 1, the adapter 6 is formed with ventilation holes 61 communicating with the receiving cavity to facilitate the flow of the cooling air. The ventilation holes 61 may be elongated, square, or of other shapes. The exhaust port of the heat dissipation fan 5 may be provided facing the heat dissipation member 4 or facing the side opposite to the heat dissipation member, as long as the corresponding air flow can be generated. Preferably, to form more effective cooling air and meet the heat dissipation needs of each component, the exhaust port is provided facing the heat dissipation member. Also, to meet the mounting needs and maintain a smaller diameter and volume, the adapter 6 may be set to a cylindrical shape. A connection plate 19 is provided at the end of the housing 1 and is connected to the adapter 6 by fixing screws 8 to fix the adapter and the housing to each other.
[0025] The above are only preferred embodiments of the present invention and do not limit the scope of the utility model registration claims of the present invention. Under the inventive concept of the present invention, equivalent structural conversions made using the content of the specification and drawings of the present invention, or direct or indirect applications in other related technical fields, are all included within the protection scope of the present invention.
Claims
1. An LED headlight structure for an automobile, comprising a housing (1), a substrate (3) mounted within the housing and having an LED chip (2) mounted thereon, a heat-conducting heat dissipation member (4), and a rotatable heat dissipation fan (5), wherein a cavity (11) is provided within the housing, the heat dissipation fan is mounted within the cavity, a heat dissipation groove (12) is provided on an outer wall of the housing between the heat dissipation fan and the LED chip, and the heat dissipation member is mounted in the heat dissipation groove and is in contact with the substrate. An LED headlight structure for an automobile, characterized by the above.
2. The housing (1) includes an LED chip segment (13), a heat dissipation segment (14), and a connection segment (15) provided in sequence. The heat dissipation fan (5) is mounted within the connection segment. The heat dissipation groove is provided in the heat dissipation segment. The LED chip segment is straight, and an LED chip hole (16) for exposing the LED chip (2) is formed. The LED headlight structure for an automobile according to claim 1, characterized by the above.
3. The diameter of the inner wall of the connection segment (15) is larger than the diameter of the inner wall of the heat dissipation segment (14). The LED headlight structure for an automobile according to claim 2, characterized by the above.
4. A fan mounting groove (18) is provided on an inner wall of an end of the heat dissipation segment (14) opposite to the LED chip (2). A fan mounting plate (51) is fixedly mounted within the fan mounting groove, and a rotation shaft of the heat dissipation fan (5) is mounted on the fan mounting plate. The LED headlight structure for an automobile according to claim 2, characterized by the above.
5. The housing (1) is provided with a notch (17) on the LED chip (2) side of the heat dissipation groove (12). The LED headlight structure for an automobile according to any one of claims 1 to 4, characterized by the above.
6. The heat dissipation member includes a heat dissipation bottom plate (41) in contact with the substrate (3), and a plurality of heat dissipation fins (42) provided perpendicular to an outer surface of the heat dissipation bottom plate. The outer surface of the heat dissipation bottom plate (41) is provided within a plane where the bottom surface of the notch (17) of the heat dissipation groove is located or on the substrate (3) side of the plane. The LED headlight structure for an automobile according to any one of claims 1 to 4, characterized by the above.
7. An adapter (6) connected to an automotive system is attached to an end of the housing (1) opposite to the LED chip (2). The adapter has an opening on the LED chip side and is provided with a receiving cavity recessed inward. A circuit board (7) is fixedly attached within the receiving cavity, and an end of the substrate (3) extends into the receiving cavity and is connected to the circuit board. The LED headlight structure for an automobile according to claim 1, characterized in that.
8. An escape hole (31) for passing the heat dissipation fan (5) is formed at a location where the substrate (3) and the heat dissipation fan (5) face each other. The LED headlight structure for an automobile according to claim 1 or 7, characterized in that.
9. The adapter (6) is formed with a vent hole (61) communicating with the receiving cavity. The LED headlight structure for an automobile according to claim 7, characterized in that.
10. The exhaust port of the heat dissipation fan (5) is provided toward the heat dissipation member (4). The LED headlight structure for an automobile according to any one of claims 1 to 4 or 7, 9, characterized in that.