High-power in-line LED vehicle lamp

Abstract

The utility model discloses a high-power in-line LED car lamp which comprises a shell composed of a left half shell and a right half shell and a copper substrate clamped between the left half shell and the right half shell, the periphery of the copper substrate is exposed, and at least one LED light source is symmetrically arranged on the two sides of the copper substrate. Light transmitting openings for exposing the LED light sources are formed in the positions, corresponding to the LED light sources, of the left half shell and the right half shell in a penetrating mode, a containing cavity located at the rear end of the copper substrate is further formed between the left half shell and the right half shell, and one end of the copper substrate is exposed in the containing cavity; a centrifugal fan facing the copper substrate and a driving plate electrically connected with the copper substrate and the centrifugal fan are arranged in the containing cavity, a plurality of heat dissipation grooves which extend in the axial direction of the centrifugal fan and are arranged at intervals are formed in the outer side of the left half shell and the outer side of the right half shell correspondingly, and one end of each heat dissipation groove communicates with the containing cavity. The left half shell and the right half shell are each provided with a plurality of air inlet holes communicating with the containing cavity. The LED lamp has the advantages of being good in heat conduction effect and heat dissipation effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle lamps, and particularly relates to a high-power direct-insert LED vehicle lamp. Background Art

[0002] LED vehicle lamps have the characteristics of low voltage, uniform light emission, long service life, instant-on, and can emit neutral light. Compared with the current mainstream halogen lamps and high-intensity discharge lamps (HID) in vehicle light sources, they have relatively better advantages. With high driving safety, LEDs have been widely used in vehicle lamps.

[0003] However, the LED chips used in LED lamps generate a large amount of heat during operation. Once the temperature of the LED chips is too high, the phenomenon of LED chip burnout is likely to occur, affecting the service life of LED vehicle lamps. Generally, a cooling fan is added inside the vehicle lamp to dissipate heat for the LED vehicle lamps on the market.

[0004] Some existing direct-insert LED vehicle lamps include a housing, a cooling fan and an LED lamp board disposed inside the housing. First of all, the LED lamp board is disposed inside the housing, with a small overall surface area and a small contact area with the housing. Therefore, the heat conduction efficiency between the two is poor, and the heat dissipation effect is not ideal. In addition, the cooling fan uses an ordinary fan for heat dissipation and cooperates with the air inlet holes and air outlet holes at the front and rear ends of the fan to achieve the effect of air flowing back and forth. However, in this structure, the flow range of air and the contact area with the housing are small, and the heat dissipation effect is not good. Due to the unsatisfactory heat dissipation, it is easy to cause light decay and failure of the LED, or to overcome the problem of high heat by sacrificing brightness and reducing power. As a result, the existing structure is only suitable for vehicle lamps of about 20W and is not suitable for some high-power LED vehicle lamps using linear drive ICs (the power requirement for such vehicle lamps is generally above 25W). In addition, the lamp board and the drive board of some LED vehicle lamps are connected by wires, which are not only easy to break, but also increase the assembly difficulty and reduce the yield. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the existing technical defects and provide a high-power direct-insert LED vehicle lamp with good heat conduction and heat dissipation effects.

[0006] To solve the above technical problems, the present utility model provides a high-power through-hole LED headlight, which includes a housing composed of a left half-shell and a right half-shell, and a copper substrate clamped between the left half-shell and the right half-shell. The copper substrate matches the outer shapes of the left half-shell and the right half-shell, so that the outer periphery of the copper substrate is exposed. At least one LED light source is symmetrically arranged on both sides of the copper substrate. Light-transmitting openings are respectively provided on the left half-shell and the right half-shell at positions corresponding to the LED light sources to expose the LED light sources. A receiving cavity is further formed between the left half-shell and the right half-shell at the rear end of the copper substrate. One end of the copper substrate is exposed in the receiving cavity. A driving board and a centrifugal fan arranged towards the copper substrate are provided in the receiving cavity. The driving board is electrically connected to the copper substrate and the centrifugal fan respectively. A plurality of heat dissipation grooves extending along the axial direction of the centrifugal fan and arranged at intervals are respectively formed on the outer sides of the left half-shell and the right half-shell. One end of the heat dissipation groove is communicated with the receiving cavity. A plurality of air inlet holes communicated with the receiving cavity are respectively provided on the left half-shell and the right half-shell.

[0007] Further, two insertion arms are respectively arranged at the rear end of the copper substrate on both sides of the centrifugal fan. Two first insertion interfaces are provided on the driving board. The ends of the two insertion arms are respectively inserted into the two first insertion interfaces and fixed by welding.

[0008] Further, the high-power through-hole LED headlight further includes a power connector arranged at the rear end of the housing to close the receiving cavity. The power connector is electrically connected to the driving board.

[0009] Further, two metal inserts penetrating through the power connector from front to back are symmetrically arranged on the power connector. Two second insertion interfaces are further provided on the driving board. The inner ends of the two metal inserts are respectively inserted into the two second insertion interfaces and fixed by welding.

[0010] Further, a light-emitting cavity is respectively recessed on the outer sides of the left half-shell and the right half-shell. The light-transmitting opening is arranged in the light-emitting cavity. And at least part of the other ends of the heat dissipation grooves are communicated with the light-emitting cavity. A fan-shaped heat dissipation opening is respectively provided on both sides of the left half-shell and the right half-shell at the positions corresponding to the air outlet of the centrifugal fan.

[0011] Further, the left half-shell, the copper substrate and the right half-shell are fixed by screws.

[0012] Further, through holes for the front ends of the screws to pass through are respectively provided on the copper substrate and the right half-shell. A threaded hole for screwing the screw is provided on the left half-shell.

[0013] Further, two symmetrically arranged openings are further formed between the left half-shell and the right half-shell. Positioning parts are arranged at both ends of the driving board at the openings.

[0014] Further, a linear drive IC is provided on one side of the copper substrate. An accommodation groove for accommodating the linear drive IC and communicating with the accommodation cavity is concavely provided on the inner side of the left half shell or the right half shell, and at least a part of the heat dissipation groove communicates with the accommodation groove.

[0015] Further, a chuck is radially protruded on the outer periphery of the rear end of the housing. The heat dissipation groove and the air inlet hole are respectively arranged at the front and rear ends of the chuck, and a groove is formed between the rear end of the chuck and the housing.

[0016] Further, a stop ring platform is also protruded on the outer periphery of the chuck, and at least one positioning ear is further formed on the outer periphery of the stop ring platform.

[0017] The utility model has the following beneficial effects:

[0018] In the utility model, the shape of the copper substrate is matched with that of the left and right half shells, that is, the sizes and shapes of the contact surfaces between the two sides of the copper substrate and the left and right half shells are matched, forming a flat contact structure, which expands the contact area among the three, thereby improving the heat conduction efficiency of the housing for conducting the heat on the copper substrate outwards. Moreover, the outer periphery of the copper substrate is exposed outside and directly contacts with the air, which can also accelerate its heat dissipation. Secondly, by using the cooperation of the centrifugal fan and the heat dissipation groove in the accommodation cavity, the air can flow back and forth along the outer side surface of the left and right half shells, expanding the air flow area and the contact area with the housing, and further improving the heat dissipation effect.

[0019] In addition, the rear end of the copper substrate is plugged and welded to the driving board through two plugging arms respectively arranged on both sides of the centrifugal fan. This method of replacing wire connection simplifies the overall connection structure and is convenient for assembly. The two plugging arms can also play a role in surrounding and protecting the centrifugal fan, which is also beneficial to the stability and efficiency of the overall vehicle lamp.

[0020] The additional aspects and advantages of the utility model will be partially given in the following description, and these will become obvious from the following description, or can be understood through the practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the utility model, form a part of this application, and do not constitute an improper limitation to the utility model. In the drawings:

[0022] Figure 1 It is a schematic diagram of the LED vehicle lamp in the embodiment;

[0023] Figure 2 It is a schematic diagram of another perspective of the LED vehicle lamp in the embodiment;

[0024] Figure 3 It is a front sectional view of the LED vehicle lamp in the embodiment;

[0025] Figure 4 Side cross-sectional view of the LED headlight in the embodiment;

[0026] Figure 5 Schematic diagram after the combination of the left half shell and the copper substrate in the embodiment;

[0027] Figure 6 Schematic diagram of the left half shell in the embodiment;

[0028] Figure 7 Schematic diagram of the LED headlight after removing the housing in the embodiment;

[0029] Figure 8 Schematic diagram of the copper substrate in the embodiment;

[0030] Figure 9 Schematic diagram of the left driving board in the embodiment. Detailed implementation manners

[0031] In order to more fully understand the technical content of the present utility model, the following will further introduce and illustrate the present utility model in combination with the accompanying drawings and specific embodiments; it should be noted that in the text, descriptions such as "first" and "second" are used to distinguish different components, etc., and do not represent a sequence, nor do they limit that "first" and "second" are of different types.

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in combination with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments; based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present utility model.

[0033] Embodiment

[0034] As Figures 1 to 9As shown in the figure, the high-power through-hole LED headlamp of this embodiment includes a housing composed of a left half-shell 1 and a right half-shell 2, and a copper substrate 3 clamped between the left half-shell 1 and the right half-shell 2. The copper substrate 3 matches the outer shapes of the left half-shell 1 and the right half-shell 1, that is, the sizes and outer shapes of the contact surfaces of the three match each other, forming a flat contact, which expands the contact area among the three, thereby improving the heat conduction efficiency of the housing to conduct the heat on the copper substrate outward. Moreover, the outer periphery of the copper substrate 3 is exposed outside and directly contacting with air can also accelerate its heat dissipation. At least one LED light source 31 is symmetrically arranged on both sides of the copper substrate 3. Light-transmitting openings 10 are respectively provided on the left half-shell 1 and the right half-shell 2 at positions corresponding to the LED light sources 31 to expose the LED light sources 31, forming a double-sided light-emitting structure. The LED light sources 31 on the copper substrate 3 are used to form the high beam and / or low beam of the vehicle. A receiving cavity 11 is further formed between the left half-shell 1 and the right half-shell 2 at the rear end of the copper substrate 3. One end of the copper substrate 3 is exposed in the receiving cavity 11. A driving board 4 and a centrifugal fan 5 arranged towards the copper substrate 3 are provided in the receiving cavity 11, that is, the air outlet end of the centrifugal fan is close to the copper substrate, and the air inlet end is far from the copper substrate. The driving board 4 is electrically connected to the copper substrate 3 and the centrifugal fan 5 respectively, and is used to control the working states of the copper substrate 3 and the centrifugal fan 5 respectively. A plurality of heat dissipation grooves 12 extending along the axial direction of the centrifugal fan 5 and arranged at intervals are respectively formed on the outer sides of the left half-shell 1 and the right half-shell 2. One end of the heat dissipation groove 12 is communicated with one end of the receiving cavity 11 close to the air outlet of the centrifugal fan, so that the air blown out by the centrifugal fan around can be blown out through the orifice where the heat dissipation groove is communicated with the receiving groove and can flow back and forth along the heat dissipation groove. A plurality of air inlet holes 13 are respectively provided on the left half-shell 1 and the right half-shell 2, and the air inlet holes 13 are communicated with one end of the receiving cavity 11 close to the air inlet of the centrifugal fan, that is, the air inlet holes 13 and the heat dissipation grooves are respectively arranged at both ends of the receiving cavity 11. Here, the cooperation of the centrifugal fan and the heat dissipation groove is used to enable the air to flow back and forth along the outer surface of the left and right half-shells, expanding the air flow area and the contact area with the housing, and further improving the heat dissipation effect.

[0035] In one embodiment, as Figures 4 to 9 shown, two plugging arms 32 are respectively arranged on the rear end of the copper substrate 3 on both sides of the centrifugal fan 5. Two first plugging interfaces 41 are provided on the driving board 4. The ends of the two plugging arms 32 are respectively plugged into the two first plugging interfaces 32 and then fixed by welding. This method of replacing wire connection simplifies the overall connection structure and is convenient for assembly; the two plugging arms can also play a role in surrounding and protecting the centrifugal fan, which is also beneficial to the stability and efficiency of the overall headlamp.

[0036] In one embodiment, as Figure 2 and Figure 9As shown, the high-power through-hole LED headlamp further includes a power connector 6 located at the rear end of the housing for enclosing and accommodating the cavity 11. That is, the rear end of the accommodating cavity formed between the left and right half-shells is designed with an opening, and the power connector 6 is arranged at the opening. The power connector 6 is electrically connected to the driving board 4. The power connector is preferably a two-pin plug. That is, two metal inserts 61 that penetrate through it front and back are symmetrically arranged on the power connector 6. The two metal inserts are used to connect to the positive and negative poles of the vehicle-mounted circuit respectively. Two second sockets 42 are also arranged on the driving board. The inner ends of the two metal inserts 61 are respectively inserted into the two second sockets 42 and fixed by welding.

[0037] In one embodiment, as Figure 9 shown, two insertion holes 43 are also arranged on the driving board 4. Two pins (not shown in the figure) are arranged on the centrifugal fan and respectively inserted into the two insertion holes 43. After the pins and the insertion holes are inserted, they are fixed by welding.

[0038] In the above, by reserving sockets or insertion holes for inserting the copper substrate, power plug and centrifugal fan on the driving board, point-to-point fixed insertion is realized, reducing the use of screws and connecting wires, simplifying the overall connection structure, facilitating assembly, and effectively improving the assembly efficiency and reducing the defective rate.

[0039] In one embodiment, as Figures 1 to 2 shown, a light-emitting cavity 14 is recessed on the outer sides of both the left half-shell 1 and the right half-shell 2. The light-transmitting opening 10 penetrates through the light-emitting cavity 14, and at least one end of at least part of the heat dissipation grooves 12 communicates with the light-emitting cavity 14. That is, at least one heat dissipation groove communicates with the light-emitting cavity, so that the air flow flowing forward along the heat dissipation grooves can flow into the light-emitting cavity and contact the LED light source, further improving the heat dissipation effect on the copper substrate and the LED light source.

[0040] In one embodiment, a fan-shaped heat dissipation opening 20 is penetrated on both sides of the left half-shell 1 and the right half-shell 2 at the corresponding air outlet of the centrifugal fan 5. The design of the heat dissipation opening 20 increases the blowing effect on both sides of the housing, thereby providing a better heat dissipation effect. Optionally, the heat dissipation opening 20 may not communicate with the heat dissipation grooves 12 or may communicate with at least one heat dissipation groove 12.

[0041] In one embodiment, as Figure 3 shown, the left half-shell 1, the copper substrate 3 and the right half-shell 2 are fixed by two screws 7 distributed front and back.

[0042] Specifically, as Figures 1 to 8As shown, two through holes 71 for the front ends of the screws 7 to pass through are provided on both the copper substrate 3 and the right half shell 2, and the two through holes are respectively arranged on the front and rear sides of the LED light source 31. Two threaded holes 72 that are respectively threadedly connected to each of the screws 7 are provided on the left half shell 1. By arranging the screws for fixing the three components at the front end, compared with the existing structure in which the fixing screws are arranged at the chuck at the rear of the shell, the problem that the chuck is raised due to the presence of the screws and affects the installation of some vehicle models is avoided, and the applicability is relatively good.

[0043] In one embodiment, as Figure 2 shown, two symmetrically arranged openings 15 are also formed between the left half shell 1 and the right half shell 2. Positioning portions 44 placed at the openings 15 are provided at both ends of the driving board 4 to avoid the problem of the driving board rotating, and the ends of the inserting arms 32 are exposed at the openings by using the openings, facilitating the insertion of the inserting arms into the insertion ports.

[0044] In one embodiment, as Figure 3 shown, a chuck 16 is radially protruded on the outer periphery of the rear end of the shell. The heat dissipation grooves 12 and the air inlet holes 13 are respectively arranged at the front and rear ends of the chuck 16. Thus, a groove 161 is formed between the rear end of the chuck 16 and the shell through the chuck.

[0045] In one embodiment, as Figures 2 to 3 shown, a stop ring platform 17 is also protruded on the outer periphery of the chuck 16, and at least one positioning ear 18 is formed on the outer periphery of the stop ring platform 17, facilitating the positioning and assembly of the LED vehicle lamp on the vehicle.

[0046] In another embodiment, as Figure 3 and Figure 8 shown, a linear drive IC 33 is provided on one side of the copper substrate 3. A receiving groove 19 for receiving the linear drive IC 33 and communicating with the receiving cavity is recessed on the inner side of the left half shell or the right half shell. At the same time, part of the heat dissipation grooves 12 communicate with the receiving groove 19.

[0047] In other embodiments, the LED light source is composed of a plurality of arranged LED lamp beads.

[0048] In other embodiments, the copper substrate is the LED lamp board.

[0049] The technical solutions provided by the embodiments of the present invention have been introduced in detail above. Specific examples are used in this article to elaborate on the principles and implementation manners of the embodiments of the present invention. The descriptions of the above embodiments are only applicable to help understand the principles of the embodiments of the present invention; at the same time, for those of ordinary skill in the art, according to the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A high-power direct-plug LED car light, characterized in that: The invention comprises a shell composed of a left half shell and a right half shell and a copper base plate clamped between the left half shell and the right half shell, and the outer periphery of the copper base plate is exposed to the outside, at least one LED light source is symmetrically arranged on both sides of the copper base plate, and light-transmitting openings for exposing the LED light source are penetrated through the left half shell and the right half shell at positions corresponding to the LED light sources, and an accommodating cavity is also formed between the left half shell and the right half shell at the rear end of the copper base plate, one end of the copper base plate is exposed in the accommodating cavity, a driving plate and a centrifugal fan arranged toward the copper base plate are arranged in the accommodating cavity, and the driving plate is electrically connected to the copper base plate and the centrifugal fan respectively, and a plurality of heat dissipation grooves extending along the axial direction of the centrifugal fan and arranged at intervals are formed on the outer sides of the left half shell and the right half shell, one end of the heat dissipation grooves is communicated with the accommodating cavity, and a plurality of air inlet holes communicated with the accommodating cavity are provided on the left half shell and the right half shell.

2. The high-power direct-plug LED headlight according to claim 1, characterized in that: The rear end of the copper base plate is extended with two plug-in arms which are respectively arranged on both sides of the centrifugal fan. The driving board is provided with two first plug-in ports. The ends of the two plug-in arms are respectively plugged into the two first plug-in ports and fixed by welding.

3. The high-power direct-plug LED lamp according to claim 2, characterized in that: It also includes a power connector located at the rear end of the shell to close the accommodating cavity, and the power connector is electrically connected to the driving board.

4. The high-power direct-plug LED headlight according to claim 3, characterized in that: The power connector is symmetrically provided with two metal inserts penetrating the power connector from front to back. The drive board is also provided with two second plug interfaces. The inner ends of the two metal inserts are respectively plugged into the two second plug interfaces and fixed by welding.

5. The high-power direct-plug LED headlight according to claim 4, characterized in that: A light exit cavity is recessed on the outer side of the left half shell and the right half shell, the light-transmitting port is penetrated in the light exit cavity, and the other end of at least part of the heat dissipation slot is connected to the light exit cavity; a fan-shaped heat dissipation port is penetrated on both sides of the left half shell and the right half shell at the air outlet corresponding to the centrifugal fan.

6. The high-power direct-plug LED vehicle lamp according to claim 5, characterized in that: The left half shell, the copper base plate and the right half shell are fixed by screws. The copper base plate and the right half shell are both provided with through holes for the front ends of the screws to pass through. The left half shell is provided with a threaded hole threadedly connected to the screw.

7. The high-power direct-plug LED lamp for vehicles as claimed in claim 6, characterized in that: Two symmetrically arranged openings are formed between the left half shell and the right half shell, and positioning parts are arranged at the openings at both ends of the driving plate.

8. The high-power direct-plug LED vehicle lamp according to claim 7, characterized in that: A linear driver IC is disposed on one side of the copper substrate, and a receiving groove for receiving the linear driver IC and communicating with the receiving cavity is concavely disposed on the inner side of the left half shell or the right half shell, and at least part of the heat dissipation groove is communicated with the receiving groove.

9. The high-power direct-plug LED headlight according to any one of claims 1 to 8, characterized in that: A chuck is radially protruded on the outer periphery of the rear end of the shell, the heat dissipation slot and the air inlet hole are respectively arranged at the front and rear ends of the chuck, and a groove is formed between the rear end of the chuck and the shell.

10. The high-power direct-plug LED vehicle lamp according to claim 9, characterized in that: The outer periphery of the chuck is also protruded with a stop ring platform, and the outer periphery of the stop ring platform is also formed with at least one positioning ear.

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