CN112361294A - Light guide support with heat dissipation structure - Google Patents
Light guide support with heat dissipation structure Download PDFInfo
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- CN112361294A CN112361294A CN202011140175.4A CN202011140175A CN112361294A CN 112361294 A CN112361294 A CN 112361294A CN 202011140175 A CN202011140175 A CN 202011140175A CN 112361294 A CN112361294 A CN 112361294A
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- support
- heat dissipation
- positioning
- guide positioning
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 31
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/24—Light guides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
- F21S43/236—Light guides characterised by the shape of the light guide
- F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/29—Attachment thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
- F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
- F21S43/14—Light emitting diodes [LED]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/235—Light guides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
- F21S43/27—Attachment thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
本发明提供一种带散热结构的光导支架，使得光导能够有效的实现定位和固定，同时满足足够散热空间，采用一个单独的、未集成于壳体的光导定位支架来固定光导，光导定位支架的Y型凹槽结构与光导凸台的装配限制光导X向和Z向定位、光导定位支架的凸起结构限制光导顶端Y向晃动，保证光导与PCBA相对位置，光导定位支架的三个用于平衡支撑的隔断支撑片为不连续的，断开处空间保证空气流通，提高散热，同时该光导定位支架与LED的相对位置保持在一个合理的高度上‑‑‑最优为8mm的高度。本发明既保证了光导和LED相对位置实现高精度定位，又解决LED热量太高，导致光导发黄甚至被烤化的现象，有效解决和改善热问题。
The invention provides a light guide bracket with a heat dissipation structure, so that the light guide can be positioned and fixed effectively, and at the same time, sufficient heat dissipation space is satisfied. The assembly of the Y-shaped groove structure and the light guide boss restricts the X-direction and Z-direction positioning of the light guide, and the raised structure of the light guide positioning bracket limits the Y-direction shaking of the light guide top to ensure the relative position of the light guide and the PCBA. The three light guide positioning brackets are used for balance The partition support piece supported is discontinuous, and the space at the disconnection ensures air circulation and improves heat dissipation. At the same time, the relative position of the light guide positioning bracket and the LED is kept at a reasonable height—the optimal height is 8mm. The invention not only ensures high-precision positioning of the relative positions of the light guide and the LED, but also solves the phenomenon that the heat of the LED is too high, causing the light guide to turn yellow or even to be baked, thereby effectively solving and improving the thermal problem.
Description
Technical Field
The invention relates to the field of vehicle lamps, in particular to a light guide support with a heat dissipation structure.
Background
Modern car light design, the molding is more and more peculiar, and the space is more and more narrow, in order to satisfy various peculiar molding requirements simultaneously in the space of saving, the design method of LED cooperation light guide is also more and more commonly used. The problems that follow also arise, the light guide material is limited by the injection molding process, the plastic particles are easy to yellow under the condition of long-term high heat, and the original white light becomes yellow and old. Seriously affecting its aesthetic appearance. Even more because the heat of the LED is too high, resulting in a phenomenon in which the light guide is ablated. Affecting its optical performance. How to protect the light guide from the influence of heat and give consideration to accurate positioning to give full play to the best performance becomes the key of design.
The mainstream design in the market today is to fix the light guide directly to the housing or the optical unit, by reducing the tolerance chain, and thereby ensuring the relative position between the LED and the light guide. The biggest disadvantage of such designs is that the light guide product, because of its positioning, is closely surrounded or located at the periphery by the structure of the housing or optical unit, and is susceptible to the heat of the optical unit, the heat energy is difficult to spread out from a small space, and the performance of the light guide is affected. The improvement measures of some prior arts are to design the bracket structure integrated in the housing, which has the function of realizing the positioning assembly with high precision of the light guide, and the other is that compared with the above prior arts, the bracket structure integrated in the housing for positioning the periphery of the light guide product is no longer completely and tightly surrounded with the light guide, and there are some gaps and heat-conducting spaces between the bracket structures, thereby improving the scheme of the above mainstream design, however, the improved design still has two problems, the first one is that because the bracket structure is integrated in the housing, the material selection of the bracket structure is the material selection of the housing, and the thermal stability of the housing material is defective, therefore the bracket structure for fixing the light guide in the housing has the problems of unstable structure and serious deformation when the heat is too high or the temperature is too high, and has influence on the positioning of the light guide in high progress, a second problem is that although the positioning of the support structure and the light guide is improved in terms of heat flux, the gaps and spaces available for heat flux are still very limited in space and very marginal due to the structural integrity and positioning requirements. Therefore, the prior art is bottleneck to simultaneously realize high-precision positioning of the light guide and effective heat problem improvement, and the combination of the two is more difficult.
As shown in fig. 11, the light guide positioning bracket 5b.1 may be integrated with the housing 5B. However, due to the characteristics of the material selected for the shell and the structural strength, the structural strength is not too high, and the thermal stability of the material is defective, so that the problems of local overheating, unstable structure, serious and uncontrollable dimensional deformation and the like of the light guide positioning support exist, and the high-speed positioning and thermal problem improvement of the light guide are influenced. And thus is not very recommended for use in an actual project.
It is therefore important to solve the above problems.
Disclosure of Invention
In order to solve the above problems, the present invention provides a light guide bracket with a heat dissipation structure, wherein a single light guide positioning bracket is used to fix a light guide, and the relative position of the light guide positioning bracket and an LED is kept at a reasonable height, preferably 8mm, so as to ensure high-precision positioning of the relative position of the light guide and the LED, and solve the problem that the light guide is yellow or even baked due to too high heat of the LED, thereby effectively solving and improving the heat problem.
The invention aims to provide a light guide support with a heat dissipation structure, which comprises a light guide, a light guide positioning support, a printed circuit board assembly PCBA and a heat radiator; the PCBA and the radiator are assembled to form a small sub-assembly, and the light guide positioning support is directly assembled with the PCBA and the small sub-assembly of the radiator; the light guide (or a light guide sub-assembly containing the light guide) is assembled with a light guide positioning bracket, so that the minimization of an assembly tolerance chain is realized, wherein the light guide positioning bracket is a separate part and is not integrated into the shell; the light guide has two Y-shaped boss structures; the light guide positioning bracket is provided with two Y-shaped groove structures; the two Y-shaped boss structures and the two Y-shaped groove structures are respectively matched and assembled to limit the positioning of the light guide in the X direction and the Z direction; the light guide positioning support is internally provided with two protruding structures, so that the top end of the light guide is limited not to shake in the Y direction in the support in the installation process, and the relative position between the light guide and the PCBA is ensured; and the light guide positioning bracket is also provided with three partition supporting sheets for balanced support, the partition supporting sheets are discontinuous, and the space at the disconnected part can more effectively ensure the circulation of air in the product structure, thereby realizing air flow and improving the heat dissipation effect.
The further improvement lies in that: the light guide positioning bracket is provided with a Z-direction limiting plane I, a Z-direction limiting plane II, an X positive limiting plane, an X negative limiting plane I, an X negative limiting plane II and a circular structure; the light guide is used for preventing the light guide from being damaged due to manual misoperation under the action of the stop position in the X direction under the violent installation.
The further improvement lies in that: the partition supporting piece is provided with a hollow structure, so that the air can naturally flow in the space below the light guide positioning support to the maximum extent, the hot air flow is driven to be discharged, and the heat dissipation and cooling effects are realized.
The further improvement lies in that: the light guide positioning support is provided with a height gap face, the height gap face and the upper surface of one of the partition supporting sheets are on the same horizontal plane, the distance between the height gap face and the upper surface of a light source on the PCBA is set to be 8mm, and a heat dissipation space of 8mm is additionally arranged at the bottom of the light guide positioning support, which is assembled with the PCBA and the heat radiator, so that the heat dissipation effect and the air circulation are improved, and the problem that light guide is yellow due to overheating is solved.
The further improvement lies in that: the three partition support sheets can also be continuous and uninterrupted and need to contain hollow structures.
The further improvement lies in that: the replacement structure comprises a second light guide, a second light guide positioning support, a second PCBA, a second heat radiator and a shell, wherein the second light guide positioning support is installed on the shell, the shell is assembled with the small sub-assemblies of the second PCBA and the second heat radiator into a whole, and the second light guide or the small light guide assembly (provided with the second light guide) is assembled with the second light guide positioning support, wherein the second light guide positioning support is an independent part and is not integrated with the shell; the second light guide is provided with three buckle structures, the second light guide positioning support is provided with two spring clamping pieces and a groove structure, the two buckle structures are respectively matched and assembled with the two spring clamping pieces, the second light guide is limited to be positioned in the X direction, the groove structure is matched and assembled with the other buckle structure, and the stop light guide moves in the X direction in a serial mode.
The further improvement lies in that: the structure of the two Y-shaped groove structures is designed into a Y-shaped structure, and the Y-shaped structure is mainly used for increasing the guiding in the assembling process and helping the light guide to better slide into a corresponding position; meanwhile, the light guide is matched with a Y-shaped boss structure on the light guide, so that the end part of the light guide can be fixed more stably; if other structures are provided with sufficient guide structures, the structures can be made into any shapes; not limited to only Y-shaped structures; meanwhile, two Y-shaped structures are needed as a design scheme, and three or more Y-shaped structures can be made in consideration of stability; meanwhile, if the structure is limited by the influence of the product space structure, the number of the Y-shaped guide structures can be reduced to one.
The three partition supporting sheets are used for supporting and positioning the light guide positioning support when the light guide positioning support is installed on a radiator or other structures, and can also lock the relative position of the light guide positioning support, and meanwhile, the minimum clearance allowance of 8mm can be ensured between the light guide positioning support and the PCBA; the two partition supporting sheets are respectively provided with a fixed screw, and the two screws are used for fixing the light guide positioning bracket; if the product space is sufficient, or the economic requirement is not very high, 3 or more screws can be used to fix the light guide bracket; so that the stability of the product will be better.
The Y-shaped boss structure can also be designed into other structural forms, such as an inverted triangle, a trapezoid and a column structure; the Y-shaped boss structure is limited in space and can be reduced to one, or corresponding structures are added under the condition that the space is not limited to increase the stability.
The advantage of forming the light guide positioning bracket as a separate part is that the material choice of the light guide positioning bracket is not limited to the material choice of the housing, and a material with better heat resistance and stability can be selected, such as: PBT, high temperature PC; this ensures that the light guide holder is better able to hold the light guide and to ensure mechanical properties over its lifetime.
The further improvement lies in that: the light guide positioning bracket is directly positioned on the radiator, so that the tolerance chain between the LED and the light guide can be reduced, and the optical performance of the product is more stable; the material of the light guide positioning support is a white material or an aluminum-plated material, the white material is a preferred material in the aspects of ensuring that the product meets the thermal stability and reducing the occurrence probability of thermal problems, and the white material is replaced by a material with high thermal conductivity coefficient of other colors or the thermal conductivity coefficient is improved after chemical treatment on the premise that the white material has light leakage or visible risks.
The invention has the beneficial effects that: the invention adopts a single light guide positioning bracket to fix the light guide, and simultaneously, the relative position of the light guide positioning bracket and the LED is kept at a reasonable height, namely the optimal height of 8mm, thereby not only ensuring the relative position of the light guide and the LED to realize high-precision positioning, but also solving the phenomenon that the light guide is yellow or even baked due to too high heat of the LED, effectively solving and improving the heat problem, and considering the two aspects of high-precision positioning and effective heat problem improvement.
Drawings
Fig. 1 is a general assembly diagram of a structure according to a first embodiment of the present invention.
Fig. 2 is a partial cross-sectional view of a structure according to a first embodiment of the present invention.
Fig. 3 is a schematic view of a light guide positioning bracket according to a first embodiment of the invention.
Fig. 4 is a schematic view of a heat dissipation and air guiding structure of a light guide positioning bracket according to a first embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of another ideal state of the heat dissipation and air guiding structure of the light guide positioning bracket according to the present invention.
Fig. 6 shows a partial structure of a light guide according to a first embodiment of the present invention.
FIG. 7 is a partial cross-sectional view of a light guide positioning bracket and a light guide-fixed Y-shaped structure according to a first embodiment of the invention.
Fig. 8 is a schematic view of the overall assembly of a light guide positioning bracket according to a second embodiment of the invention.
Fig. 9 is a schematic view of a light guide positioning bracket according to a second embodiment of the invention.
Fig. 10 is a partial structure of a light guide according to a second embodiment of the present invention.
Fig. 11 is a schematic view of a prior art light guide positioning bracket integrated with a housing. (schematic illustration of an example of one of the prior art).
Wherein: 1-light guide, 2-light guide positioning bracket, 3-PCBA, 4-heat sink, 1.1, 1.2-Y-shaped boss structure, 2.1, 2.2-Y-shaped groove structure, 2.3, 2.4, 2.5-partition support sheet, 2.6, 2.7-protrusion structure, 2.2A-Z direction limit plane I, 2.2 b-Z direction limit plane II, 2.2c-X positive direction limit plane I, 2.2 d-X negative direction limit plane I, 2.2 e-X negative direction limit plane II, 2.2f round structure, 2.8-height clearance plane, 1A-light guide II, 2A-light guide positioning bracket II, 3A-PCBA II, 4A-heat sink II, 5-shell, 1A.1, 1A.2, 1A.3, 2 A.5-buckle structure, 2A.1, 2 A.2-card spring structure, 2 A.3-groove structure, 2 A.4-screw structure, 2a, 2b, 3 a-screws.
Detailed Description
In order to enhance the understanding of the present design, the present design will be further described with reference to the following embodiments, which are merely used to explain the concept of the present invention and are not to be construed as limiting the scope of the present design.
The coordinate system in the figure is an automobile industry three-dimensional body coordinate system, wherein the X-axis forward direction in the coordinate system is the reverse direction of automobile driving, and the Z-axis forward direction in the coordinate system is the reverse direction of gravity. In the description of the present invention, it should be noted that the terms "left", "right", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the automobile industry and the drawings, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the system or the element to be referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
The first embodiment is as follows:
as shown in fig. 1, a first embodiment of the present design relates to a light guide positioning and mounting structure, which enables a light guide to be positioned and fixed effectively, and satisfies a sufficient heat dissipation space, and achieves both high-precision positioning and effective thermal improvement. FIG. 1 shows a partial structure of a light guide; the light guide positioning bracket 2 is a single part, and the material selection of the light guide positioning bracket 2 is not limited to the material selection of the shell any more, and can preferably select the material with high thermal stability, small size deformation and low cost; 3 is a printed circuit board assembly, PCBA assembly for short; and 4, a radiator. Wherein the PCBA3 is directly fixed on the heat sink 4 through one screw 3a, the light guide positioning bracket 2 of the invention fixes the positioning bracket 2 with the PCBA3 and the heat sink 4 through two screws 2a and 2 b. The light guide 1, or one end of the light guide sub-assembly with the light guide 1, is then inserted into the light guide holder 2. The light guide 1 has a Y-shaped projection configuration 1.1/1.2 (as shown in fig. 4) that matches a Y-shaped recess configuration 2.1/2.2 (as shown in fig. 3) on the light guide holder 2 to limit the X-and Z-orientation of the light guide 1 when assembled (as shown in fig. 5).
As shown in fig. 2, in the cross-sectional structure of the present design, two raised structures 2.6, 2.7 are provided inside the light guide positioning holder 2. During installation it is ensured that the top end of the light guide does not wobble in the Y-direction inside the holder, thereby ensuring the relative position between the light guide 1 and the PCBA 3. While the PCBA3 is positioned directly between the heat sink 4, the light guide support 2 is also positioned directly between the heat sink 4. Therefore, after the light guide 1 is mounted to the light guide holder 2, it is more sufficiently ensured that the relative tolerance between the LED provided to the PCBA3 and the light guide 1 is at a minimum (the tolerance chain is minimum) than in the second embodiment, thereby ensuring high-precision positioning. Compared with the prior art, the light guide positioning support 2 is a separate part, and the bottom of the light guide positioning support 2 assembled with the PCBA3 and the heat sink 4 is provided with an 8mm heat dissipation space. So that the thermal stability is better, and the problem of yellowing caused by overheating of the light guide is technically solved.
As shown in fig. 3 to 4, the light guide positioning bracket 2 is a main design mechanism of the present design, and this embodiment only illustrates the main design core content, and is also applicable to other auxiliary structures but not within the scope of the description of this embodiment. The light guide positioning bracket 2 is provided with two Y-shaped groove structures 2.1 and 2.2 for installing and positioning the light guide 1; three partition support plates 2.3, 2.4 and 2.5 are mainly used for balance support.
As shown in fig. 4, the three separation support plates 2.3, 2.4, and 2.5 of the first embodiment of the present invention are made into a discontinuous support structure, and the discontinuous spaces between the three separation support plates can more effectively ensure the air to circulate inside the product structure, thereby achieving the function of air flowing. 2.4, 2.5 support the shell fragment structure and have the screw hole site again, can fix the light guide support more stably through the screw.
As shown in fig. 5, in the form of a partition on the light guide positioning support in an ideal state (other preferred implementations of the partition of the light guide positioning support of the present invention are also understood). The light guide positioning bracket can be a plurality of partition pieces and a hollow structure, so that air can flow naturally in the space below the light guide positioning bracket to the maximum extent, the hot air flow is driven to be discharged, and the heat dissipation and cooling effects are realized. The light guide positioning bracket 2 of the invention is provided with a height clearance surface 2.8 in combination with fig. 4 and 5, the height clearance surface 2.8 is in the same horizontal plane with the upper surface of the partition support sheet 2.3, the distance between the height clearance surface 2.8 and the upper surface of the light source on the PCBA3 is set to be 8mm, namely, a minimum clearance is designed to be 8mm, the value of 8mm is an optimal scheme according to multiple tests, if the relative clearance is reduced to be below 8mm, the risk of temperature overheating exists, and in order to solve the overheating risk, a material with higher temperature resistance grade needs to be selected to meet the requirement of thermal stability, and the additional cost of the project is increased.
As shown in fig. 6, a detailed view of the light guide mounting structure. The light guide has a mounting structure 1.1/1.2 at one end, designed in a Y-shaped configuration, in order to ensure that the end of the light guide 1 is better secured in the light guide holder 2. Moreover, for the convenience of installation, when the end part of the light guide is inserted into the light guide support, the Y-shaped structure can play a role in auxiliary guiding, and during installation, a product can find the position of the groove by itself so as to be assembled together.
Referring to fig. 7, which is a cross-sectional view of the Y-shaped structure of the light guide positioning bracket and the fixed end of the light guide according to the present invention, two planes 2.2a, 2.2b on the light guide positioning bracket limit the relative movement of the light guide in the Z-direction. Three planes 2.2c, 2.2d and 2.2e on the light guide positioning bracket respectively limit relative movement in the positive direction and the negative direction of the X. Make the light guide effectively fixed, simultaneously in order to guarantee the relative position between LED and the light guide, prevent that the artificial reason from leading to the excessive phenomenon of buckle assembly, increased circular structure 2.2f on the light guide locating support, can make the light guide even under violence installation, its X also can play the effect of stopping the position to prevent that the condition of damaging electronic components takes place because of artificial maloperation. Can be complete through light guide locating support with light guide tip X, Y, the three direction of Z restricts, has compromise the function of preventing slow-witted moreover.
The light guide positioning bracket 2 of the present embodiment is preferably a white material, which is the preferred material in terms of ensuring that the product meets thermal stability and reducing the occurrence of thermal problems. Other colors may be substituted on the premise that the white material presents a light leakage or visible risk.
The sum is as follows: the light guide positioning bracket 2 of the first embodiment of the invention is directly assembled with the PCBA3 and the heat sink 4, so that the minimization of an assembly tolerance chain is realized; the structures on the light guide positioning support 2 and the light guide, PCBA3 and heat sink 4 matched with the light guide positioning support realize accurate positioning of the light guide relative to the light source; the light guide positioning bracket 2 is an independent part, the material selection of the light guide positioning bracket 2 is not limited to the material selection of the shell, and the material with high thermal stability, small size deformation and low cost is selected preferably, so that the stability of light guide high-precision positioning is further ensured; three discontinuous partition support sheets 2.3, 2.4 and 2.5 below the light guide positioning support 2 greatly improve the gap and space of heat circulation, essentially improve the heat dissipation effect, and the most preferable height of 8mm can meet the comprehensive consideration of heat dissipation optimization, size space feasibility and high cost performance.
Example two:
as shown in fig. 8, the second light guide positioning bracket 2A according to the second embodiment of the present invention is mounted to the housing 5, and the housing 5 is assembled with the sub-assemblies of the second PCBA 3A and the second heat sink 4A. In this embodiment, because the space is limited, the light guide bracket 2A is fixed to the housing 5 by using a structure with one end being fastened and one end being fixed by a screw, the light guide bracket 2A is directly fixed to the light guide bracket 2A by using three fasteners (1 a.1, 1a.2, 1 a.3), the PCBA bracket 3A is fixed to the heat sink bracket 4A by using 4 screws to form a small sub-assembly, and finally the small sub-assembly of the PCBA bracket 3A and the heat sink bracket 4A is fixed to the back of the housing 5.
As shown in fig. 9, the design structure of the light guide holder according to the second embodiment of the present invention includes two spring clips 2a.1/2a.2 for fixing the bosses 1a.1/1a.2 (see fig. 10) on the light guide to limit the position of the light guide in the X direction. And the groove structure 2A.3 is used for stopping the second light guide 1A and preventing the second light guide 1A from moving in the reverse direction X. And the buckling structure 2A.5 is used for fixing the second light guide positioning bracket 2A on the shell 5. The snap structure 2a.5 of the present embodiment, if not limited by space, can be changed to a screw structure for better mechanical stability, and a screw structure 2a.4 for snap-fastening the light guide to the housing 5.
Referring to fig. 10, a partial assembly structure of a second light guide 1A matched with a second light guide fixing bracket 2A according to the present invention is shown. A total of three boss structures which are distributed in a triangular shape. The boss structure 1A.1/1A.2 is matched with the spring clamping structure 2A.1/2A.2 on the light guide buckle II 2A and used for limiting the light guide II 1A from moving in the X direction. The boss structure 1A.3 is matched with the groove structure 2A.3 on the light guide buckle 2A and used for limiting the reverse movement of the light guide II 1A to X.
The second light guide positioning bracket 2A of the present embodiment is preferably made of a white material, which is a preferred material in terms of ensuring that the product meets thermal stability and reducing the occurrence of thermal problems. Other colors may be substituted on the premise that the white material presents a light leakage or visible risk.
The sum is as follows: the second light guide positioning bracket 2A of the second embodiment of the invention is assembled with the housing 5, and the housing 5 is assembled with the small sub-assembly of the second PCBA 3A and the second heat sink 4A, although the assembly tolerance chain is slightly increased compared with that of the first embodiment, the case is particularly suitable for the implementation case that the heat sink is externally arranged on the housing; the structure on the second light guide positioning bracket 2A and the second light guide 1A matched with the second light guide positioning bracket realize the accurate positioning of the light guide relative to the light source; like the first embodiment, the second light guide positioning bracket 2A is a single component, and the material selection is not limited, and preferably, the material has high thermal stability, small dimensional deformation and low cost, so that the stability of high-precision positioning of the light guide is further ensured, and the heat dissipation problem is also helped.
In summary, in the first embodiment, a minimum tolerance chain and an optimal heat dissipation space are considered for an optimal recommended scheme. Second, the problem of light guide yellowing or melting due to heat can be solved, although the tolerance chain is large. Compared with the prior art, the light guide end part can be more stably fixed by adding an additional support, so that the direct relative position of the light guide and the optical element can be more stable, and meanwhile, once an unstable risk factor appears, a material with better stability can be selected to be used as a positioning support, so that the cost is saved. Secondly, the design concept of 8mm minimum clearance has been had, the fool-proof structure that the design contains simultaneously, assurance product that can be fine has sufficient convection current space for the air can circulate relatively, takes away the unnecessary heat of optical components and parts.
Claims (8)
1. The utility model provides a take heat radiation structure's light guide support which characterized in that: the device comprises a light guide (1), a light guide positioning bracket (2), a printed circuit board assembly PCBA (3) and a radiator (4); the PCBA (3) and the radiator (4) are assembled to form a small sub-assembly, and the light guide positioning support (2) is directly assembled with the small sub-assembly of the PCBA (3) and the radiator (4); the light guide (1) (or a light guide small assembly provided with the light guide (1)) is assembled with the light guide positioning bracket (2), and the minimization of an assembly tolerance chain is realized, wherein the light guide positioning bracket (2) is a separate part and is not integrated in a shell; the light guide (1) has two Y-shaped boss structures (1.1) and (1.2); the light guide positioning bracket (2) is provided with two Y-shaped groove structures (2.1) and (2.2); the Y-shaped boss structures (1.1) and (1.2) are matched and assembled with the Y-shaped groove structures (2.1) and (2.2) respectively, so that the positioning of the light guide (1) in the X direction and the Z direction is limited; the light guide positioning support (2) is internally provided with two protruding structures (2.6) and (2.7), so that the top end of the light guide (1) is limited not to shake in the Y direction in the support in the installation process, and the relative position between the light guide (1) and the PCBA (3) is ensured; and light guide location support (2) still have three wall backing sheet (2.3), (2.4) and (2.5) that are used for balanced support, cut off backing sheet (2.3), (2.4) and (2.5) and be discontinuous, the space of disconnection department can more effectively guarantee the air and circulate in product structure inside, realizes the air flow and improves the radiating effect.
2. The light guide support with heat dissipation structure of claim 1, wherein: the light guide positioning support (2) is provided with a Z-direction limiting plane I (2.2 a), a Z-direction limiting plane II (2.2 b), an X positive limiting plane I (2.2 c), an X negative limiting plane I (2.2 d), an X negative limiting plane II (2.2 e) and a circular structure (2.2 f); the Z-direction limiting plane I (2.2 a) and the Z-direction limiting plane II (2.2 b) limit relative movement of the light guide in the Z direction, the X-direction positive limiting plane (2.2 c), the X-direction negative limiting plane I (2.2 d) and the X-direction negative limiting plane II (2.2 e) respectively limit relative movement of the light guide in the positive direction and the negative direction of the X direction, and the circular structure (2.2 f) is used for stopping the position of the light guide in the X direction under violent installation, so that the electronic components are prevented from being damaged due to manual misoperation.
3. The light guide support with heat dissipation structure of claim 1, wherein: the partition support sheets (2.3), (2.4) and (2.5) are provided with hollow structures, so that the natural flow of air in the space below the light guide positioning bracket is realized to the maximum extent, the discharge of hot air flow is driven, and the heat dissipation and cooling effects are realized.
4. The light guide support with heat dissipation structure of claim 1, wherein: the light guide positioning support (2) is provided with a height gap face (2.8), the height gap face (2.8) and the upper surface of the partition support sheet (2.3) are in the same horizontal plane, the distance between the height gap face (2.8) and the upper surface of a light source on the PCBA (3) is set to be 8mm, and the bottom of the light guide positioning support (2) assembled with the PCBA (3) and the radiator (4) is provided with an 8mm heat dissipation space, so that the heat dissipation effect and the air circulation are improved, and the problem that the light guide is yellow due to overheating is solved.
5. The light guide support with heat dissipation structure of claim 1, wherein: the partition support sheets (2.3), (2.4) and (2.5) can also be continuous and uninterrupted, and need to comprise hollow structures.
6. The light guide support with heat dissipation structure of claim 1, wherein: the LED lamp comprises a replacement structure, wherein the replacement structure comprises a second light guide (1A), a second light guide positioning support (2A), a PCBA (3A), a second heat sink (4A) and a shell (5), the second light guide positioning support (2A) is installed on the shell (5), the shell (5) is assembled with the PCBA (3A) and the heat sink (4A) into a whole, the second light guide (1A) (or the light guide small assembly provided with the second light guide (1A)) is assembled with the second light guide positioning support (2A), and the second light guide positioning support (2A) is an independent part and is not integrated with the shell; the second light guide (1A) is provided with three buckle structures (1 A.1), (1 A.2) and (1 A.3), the second light guide positioning support (2A) is provided with two spring clamping pieces (2 A.1), (2 A.2) and a groove structure (2 A.3), the buckle structures (1 A.1) and (1 A.2) are respectively matched and assembled with the spring clamping pieces (2 A.1) and (2 A.2), the second light guide (1A) is limited to be positioned in the X direction, the groove structure (2 A.3) and the buckle structure (1 A.3) are matched and assembled, and the second stop light guide (1A) is moved in a serial mode in the X negative direction.
7. The light guide support with heat dissipation structure of claim 1, wherein: the structure of the two Y-shaped groove structures (2.1) and (2.2) is designed into a Y-shaped structure, and the Y-shaped structure is mainly used for increasing the guiding in the assembling process and helping the light guide (1) to better slide into a corresponding position; simultaneously, the light guide is matched with Y-shaped boss structures (1.1) and (1.2) on the light guide (1), so that the end part of the light guide can be fixed more stably; the three partition supporting sheets (2.3), (2.4) and (2.5) are used for supporting and positioning the light guide positioning support (2) when the light guide positioning support (2) is installed on a radiator (4) or other structures, and can also lock the relative position of the light guide positioning support (2), and simultaneously ensure that the minimum clearance allowance of 8mm exists between the light guide positioning support (2) and the PCBA (3); two fixed screws (2 a) and (2 b) are arranged on the partition support sheets (2.4) and (2.5) and are used for fixing the light guide positioning bracket (2).
8. The light guide support with heat dissipation structure of claim 1, wherein: the light guide positioning bracket (2) is directly positioned on the heat sink (4), so that the tolerance chain between the LED and the light guide (1) can be reduced, and the optical performance of the product is more stable; the material of the light guide positioning bracket (2) is white material or aluminized material or material with high thermal conductivity coefficient or the thermal conductivity coefficient is improved after chemical treatment.
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| CN202011140175.4A CN112361294B (en) | 2020-10-22 | 2020-10-22 | Light guide bracket with heat dissipation structure |
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| CN112361294B CN112361294B (en) | 2024-11-15 |
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Cited By (2)
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| CN113217876A (en) * | 2021-04-06 | 2021-08-06 | 马瑞利汽车零部件(芜湖)有限公司 | Light guide incident end supporting seat structure integrated with elastic structure |
| CN114992576A (en) * | 2022-06-20 | 2022-09-02 | 江苏恒瑞车灯有限公司 | Car car light conduction device and car light |
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| CN114992576A (en) * | 2022-06-20 | 2022-09-02 | 江苏恒瑞车灯有限公司 | Car car light conduction device and car light |
| CN114992576B (en) * | 2022-06-20 | 2023-06-27 | 江苏恒瑞车灯有限公司 | Car car light conduction device and car light |
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| CN112361294B (en) | 2024-11-15 |
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