Illuminating device with radiator

By designing a lighting device with a radiator and connecting the radiator to the main housing using fasteners, the problem of insecure connection of the radiator in the prior art is solved, and a more stable and simple assembly process is achieved.

CN222437765UActive Publication Date: 2025-02-07SHEN ZHEN NEEWER TECH CO LTD
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Patent Information

Application Number
CN202421055703.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-14
Publication Date
2025-02-07
Estimated Expiration
2034-05-14

AI Technical Summary

Technical Problem

In the existing lighting devices, the connection structure between the radiator and the main housing is not firm enough, which makes assembly difficult.

Method used

A lighting device with a radiator is designed. The main housing includes an upper side shell and a lower side shell. The radiator is located in the accommodating cavity. The rear end is vertically inserted into the lower side shell. The front end is respectively connected to the upper side shell and the lower side. The housing is connected by a first fastener, and the lamp body is arranged at the front end of the radiator.

Benefits of technology

The firm assembly between the main housing and the radiator is realized, and the assembly structure is simplified, making the radiator not easy to loosen, improving the stability and convenience of use of the device.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The utility model discloses a lighting device with a radiator. The lighting device comprises a main shell, the radiator and a lamp body. The main shell comprises an upper side shell and a lower side shell, and the upper side shell and the lower side shell are connected and enclose to form an accommodating cavity; the radiator is located in the containing cavity, the rear end of the radiator is vertically inserted into the lower side shell, and the front end of the radiator is connected with the upper side shell and the lower side shell through first fasteners. The lamp body is arranged at the front end of the radiator. The front end of the radiator is respectively connected with the upper side shell and the lower side shell through the first fasteners, and the upper side shell, the lower side shell and the radiator are mutually connected and fixed, so that the assembly structure between the main shell and the radiator is relatively firm, and the radiator is not easy to loosen relative to the upper side shell and the lower side shell; meanwhile, compared with the mode that the front end and the rear end of the radiator are fixed through the first fasteners, the assembling structure is simplified, and the assembling structure is relatively simple.
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Description

Technical Field

[0001] The utility model relates to the field of lighting fixtures, in particular to a lighting device with a radiator. Background Art

[0002] Some existing lighting devices include a main housing, a heat sink and a lamp body. The main housing includes two side housings, which are connected by fasteners. The heat sink and the lamp body are arranged in the main housing. The heat sink is connected to one of the side housings by plugging or fastener connection, and the lamp body is connected to the heat sink. However, in the above structure, the connection structure between the heat sink and the main housing is not strong enough, and the assembly is troublesome. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a lighting device with a heat sink, wherein the main housing and the heat sink are firmly assembled and the assembly structure is relatively simple.

[0004] According to an embodiment of the utility model, the lighting device with a heat sink comprises a main housing, a heat sink and a lamp body. The main housing comprises an upper housing and a lower housing, wherein the upper housing is connected to the lower housing and encloses a receiving cavity; the heat sink is located in the receiving cavity, the rear end of the heat sink is vertically plugged into the lower housing, and the front end of the heat sink is respectively connected to the upper housing and the lower housing through a first fastener; the lamp body is arranged at the front end of the heat sink.

[0005] The lighting device with a heat sink according to the embodiment of the utility model has at least the following beneficial effects: during assembly, the rear end of the radiator is vertically plugged into and matched with the lower shell, and then the upper shell and the lower shell are vertically assembled to form a main shell, and the lamp body is located at the front end of the radiator; the front end of the radiator is respectively connected to the upper shell and the lower shell by a first fastener, and the upper shell, the lower shell and the radiator are connected and fixed to each other, so that the assembly structure between the main shell and the radiator is relatively firm, and the radiator is not easy to loosen relative to the upper shell and the lower shell, and at the same time, the first fasteners are used to fix the front and rear ends of the radiator, which simplifies the assembly structure and makes the assembly structure relatively simple.

[0006] According to some embodiments of the utility model, a front clearance hole is provided at the front end of the accommodating cavity, the front clearance hole is communicated with the accommodating cavity, the radiator is passed through the front clearance hole, the radiator includes a front plate portion, the front plate portion is located at the front side of the front clearance hole, the front plate portion is abutted against the front side wall of the main shell body, and a partial projection of the front plate portion along the front-to-back direction is located outside the front clearance hole.

[0007] According to some embodiments of the present invention, the first fastener is penetrated through the front plate portion along the front-to-back direction and connected to the front end of the main shell.

[0008] According to some embodiments of the utility model, first plug-in slots are vertically arranged on the left and right sides of the lower shell, and first plug-in strips are vertically arranged on the left and right sides of the radiator, and the first plug-in strips are plugged into the first plug-in slots one by one; a limiting member is installed on the lower shell, and the limiting member presses against the upper end of the first plug-in strip.

[0009] According to some embodiments of the utility model, a fan is also included, the upper shell is provided with an upper air hole, the lower shell is provided with a lower air hole, the radiator is located between the upper air hole and the lower air hole, the radiator is provided with a heat dissipation channel extending vertically and opening up and down, the fan is arranged on one side of the radiator along the vertical direction and is used to form a vertical heat dissipation airflow in the upper air hole, the heat dissipation channel and the lower air hole.

[0010] According to some embodiments of the utility model, the lower shell is provided with two support bars, the two support bars are arranged at intervals and support the lower end of the radiator, the middle area of ​​the lower end of the radiator is suspended, and the fan is located between the two support bars and opposite to the middle area of ​​the lower end of the radiator.

[0011] According to some embodiments of the utility model, a plurality of downwind holes are provided, and convex ribs are provided around the openings of the downwind holes.

[0012] According to some embodiments of the utility model, it also includes a lamp mounting frame and a reinforcement, the upper shell and the lower shell are plastic parts, the reinforcement is a metal part, the reinforcement is superimposed on the area where the lower air hole of the lower shell is located, and the lamp mounting frame is connected to the lower shell and the reinforcement.

[0013] According to some embodiments of the utility model, it also includes a power module, which is arranged at the rear of the radiator and located in the accommodating cavity, and the left and right sides of the power module are respectively vertically plugged with the upper shell and the lower shell, and the rear end of the power module is respectively connected to the upper shell and the lower shell through a second fastener; the power module includes a power board and a power heat sink, and the rear end of the accommodating cavity is provided with a rear clearance hole, the power heat sink is located in the rear clearance hole, and the power board is located between the power heat sink and the radiator.

[0014] According to some embodiments of the utility model, it also includes a front cover and a rear cover, the front cover is located in front of the main shell, the front cover is respectively connected to the upper shell and the lower shell, the front cover blocks the first fastener, and the rear cover is located behind the main shell, the rear cover is respectively connected to the upper shell and the lower shell and blocks the second fastener.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 A three-dimensional schematic diagram of a lighting device according to an embodiment of the utility model;

[0018] Figure 2 This is an exploded schematic diagram of a lighting device according to an embodiment of the utility model;

[0019] Figure 3 It is a three-dimensional schematic diagram of a heat sink and a power module according to an embodiment of the utility model;

[0020] Figure 4 A three-dimensional schematic diagram of the lighting device according to an embodiment of the utility model with the front cover and the rear cover removed;

[0021] Figure 5 It is a three-dimensional schematic diagram of a partial structure of a lighting device according to an embodiment of the utility model;

[0022] Figure 6 It is a three-dimensional schematic diagram of a partial structure of a lighting device according to an embodiment of the utility model;

[0023] Figure 7 It is an exploded schematic diagram of the lower shell and the reinforcement member of the embodiment of the utility model;

[0024] Figure 8 It is a three-dimensional schematic diagram of the lighting device according to the embodiment of the utility model with the front cover and the rear cover removed.

[0025] Reference numerals:

[0026] Main housing 100, front clearance hole 101, rear clearance hole 102, upper shell 110, upper air hole 111, lower shell 120, lower air hole 121, support bar 122, rib 123, first plug-in slot 130, second plug-in slot 140, third plug-in slot 150;

[0027] Radiator 200, front panel 210, first plug strip 220;

[0028] A first fastener 310, a stopper 320, and a second fastener 330;

[0029] Lamp body 400;

[0030] Fan 500;

[0031] Light fixture mounting frame 600;

[0032] Reinforcement member 700;

[0033] Power module 800, power board 810, power heat sink 820;

[0034] Front cover 910, rear cover 920. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] Reference Figures 1 to 8 , is a lighting device with a heat sink 200 according to an embodiment of the utility model, comprising a main housing 100, a heat sink 200 and a lamp body 400. The main housing 100 comprises an upper housing 110 and a lower housing 120, the upper housing 110 and the lower housing 120 are connected and enclosed to form a receiving cavity; the heat sink 200 is located in the receiving cavity, the rear end of the heat sink 200 is vertically plugged into the lower housing 120, and the front end of the heat sink 200 is respectively connected to the upper housing 110 and the lower housing 120 through a first fastener 310; the lamp body 400 is arranged at the front end of the heat sink 200.

[0040] During assembly, the rear end of the radiator 200 is vertically plugged into the lower shell 120, and then the upper shell 110 and the lower shell 120 are vertically assembled to form the main shell 100, and the lamp body 400 is located at the front end of the radiator 200; the front end of the radiator 200 is respectively connected to the upper shell 110 and the lower shell 120 through the first fastener 310, and the upper shell 110, the lower shell 120 and the radiator 200 are connected and fixed to each other, so that the assembly structure between the main shell 100 and the radiator 200 is relatively firm, and the radiator 200 is not easy to loosen relative to the upper shell 110 and the lower shell 120. At the same time, the first fastener 310 is used to fix the front and rear ends of the radiator 200, which simplifies the assembly structure and makes the assembly structure relatively simple.

[0041] In the embodiment, a front clearance hole 101 is provided at the front end of the accommodating cavity, the front clearance hole 101 is communicated with the accommodating cavity, the radiator 200 is penetrated through the front clearance hole 101, and the radiator 200 includes a front plate portion 210, the front plate portion 210 is located at the front side of the front clearance hole 101, the front plate portion 210 abuts against the front side wall of the main housing 100, and a partial projection of the front plate portion 210 along the front-to-back direction is located outside the front clearance hole 101. The front plate portion 210 is partially located outside the front clearance hole 101 and abuts against the front side wall of the main housing 100, so that the front plate portion 210 can better prevent the radiator 200 from loosening forward and backward relative to the main housing 100, thereby improving the assembly position stability of the radiator 200.

[0042] In the embodiment, the first fastener 310 is passed through the front plate portion 210 along the front-to-back direction and connected to the front end of the main housing 100. The first fastener 310 is passed through the front plate portion 210 along the front-to-back direction, so that the front end of the radiator 200 can be restricted from moving in the vertical and left-right directions. Since the rear end of the radiator 200 is vertically plugged into the lower shell 120, the rear end of the radiator 200 can be restricted from moving in the horizontal direction. The cooperation of the two can restrict the movement of the radiator 200 in all directions, making the assembly position of the radiator 200 more secure.

[0043] Specifically, the first fastener 310 is a screw, and the front plate 210 is provided with a through hole. The screw is passed through the through hole and threadedly connected to the threaded hole to fix the front end of the heat sink 200. It is conceivable that the first fastener 310 can also be a rivet or the like.

[0044] In the embodiment, the left and right sides of the lower shell 120 are vertically provided with first plug-in slots 130, and the left and right sides of the radiator 200 are vertically provided with first plug-in strips 220, and the first plug-in strips 220 are plugged into the first plug-in slots 130 one by one; the lower shell 120 is installed with a limiter 320, and the limiter 320 abuts against the upper end of the first plug-in strip 220. The limiter 320 is provided to limit the risk of the radiator 200 loosening upward after being plugged in, and to improve the stability of the installation position of the radiator 200. Specifically, the limiter 320 is a meson screw, which is threadedly connected to the periphery of the socket of the plug-in slot, and the lower side of the screw head of the meson screw abuts against the upper end of the first plug-in strip 220, thereby limiting the position of the first plug-in strip 220, and the structure is simple and easy to implement. It is conceivable that the limiter 320 can also be other structures, for example, the limiter 320 is other types of screws.

[0045] It is conceivable that the rear end of the radiator 200 can also be plugged in and matched with the lower shell 120 in other ways. For example, a first plug-in slot 130 is vertically arranged on the radiator 200, and a first plug-in strip 220 is vertically arranged on the lower shell 120, and the two are plugged in and matched to achieve assembly; or a plug-in hole is arranged at the rear end of the radiator 200, and a plug-in column is arranged on the lower shell 120, and the plug-in column cooperates with the plug-in hole to achieve plug-in assembly of the two.

[0046] In the embodiment, a fan 500 is further included, the upper shell 110 is provided with an upper air hole 111, the lower shell 120 is provided with a lower air hole 121, the radiator 200 is located between the upper air hole 111 and the lower air hole 121, the radiator 200 is provided with a heat dissipation channel extending vertically and opening up and down, and the fan 500 is provided on one side of the radiator 200 along the vertical direction and is used to form a vertical heat dissipation airflow in the upper air hole 111, the heat dissipation channel and the lower air hole 121. The fan 500 and the upper air hole 111 and the lower air hole 121 are provided, and when the fan 500 is started, an airflow passing through the radiator 200 can be generated in the direction from the lower air hole 121 to the upper air hole 111, thereby improving the heat dissipation effect of the radiator 200 on the lamp body 400.

[0047] Specifically, the upper air hole 111 is a strip-shaped hole, and the lower air hole 121 is a triangular hole.

[0048] In the embodiment, the lower shell 120 is provided with two support bars 122, the two support bars 122 are arranged at intervals and support the lower end of the radiator 200, the middle area of ​​the lower end of the radiator 200 is suspended, and the fan 500 is located between the two support bars 122 and opposite to the middle area of ​​the lower end of the radiator 200. By supporting the lower end of the radiator 200 with the two support bars 122, the contact area between the radiator 200 and the air can be increased to improve the heat dissipation effect, so that the airflow generated by the fan 500 when working can better pass through the radiator 200 to dissipate heat for the radiator 200.

[0049] In the embodiment, a plurality of downwind holes 121 are provided, and a convex rib 123 is provided around the opening of the downwind hole 121. Since the lower shell 120 is provided with the downwind hole 121, the lower shell 120 has a mesh structure in the area of ​​the downwind hole 121, and its strength is affected. Therefore, by providing the convex rib 123 around the opening of the downwind hole 121, the strength of the lower shell 120 in the area of ​​the downwind hole 121 can be improved, and the risk of the lower shell 120 being broken at the downwind hole 121 during the use of the lighting device can be reduced. It is conceivable that the number of downwind holes 121 can be three or more, and those skilled in the art can make specific configurations according to actual needs.

[0050] In the embodiment, a lamp mounting frame 600 and a reinforcement member 700 are also included. The upper shell 110 and the lower shell 120 are plastic parts, and the reinforcement member 700 is a metal part. The reinforcement member 700 is superimposed on the area where the lower air hole 121 of the lower shell 120 is located, and the lamp mounting frame 600 is connected to the lower shell 120 and the reinforcement member 700.

[0051] Specifically, the lighting device can be connected to an external bracket through the lamp mounting frame 600. Since the upper shell 110 and the lower shell 120 are plastic parts, the weight of the main shell 100 of the lighting device is greatly reduced. Since the lamp mounting frame 600 is connected to the lower air hole 121 of the lower shell 120, the reinforcement 700 is overlapped with the area where the lower air hole 121 of the lower shell 120 is located, so that the lamp mounting frame 600 and the lower shell 120 and the reinforcement 700 can be connected together, thereby improving the connection strength and the structural strength of the lower shell 120 in the area of ​​the lower air hole 121, and reducing the risk of damage to the lower shell 120.

[0052] Specifically, the reinforcement 700 is also provided with an air hole having the same shape as the lower air hole 121 , and the air hole is opposite to the lower air hole 121 , so as to prevent the reinforcement 700 from blocking the airflow in the lower air hole 121 and affecting the working effect of the fan 500 .

[0053] In the embodiment, a power module 800 is also included. The power module 800 is arranged at the rear of the radiator 200 and is located in the accommodating cavity. The left and right sides of the power module 800 are respectively plugged into the upper shell 110 and the lower shell 120 along the vertical direction, and the rear end of the power module 800 is respectively connected to the upper shell 110 and the lower shell 120 through the second fastener 330; the above-mentioned power module 800 is also connected and fixed to each other between the upper shell 110 and the lower shell 120, so that the connection between the upper shell 110, the lower shell 120 and the power module 800 is more secure and not easy to loosen.

[0054] The power module 800 includes a power board 810 and a power heat sink 820. A rear clearance hole 102 is provided at the rear end of the accommodating cavity. The power heat sink 820 is located in the rear clearance hole 102. The power board 810 is located between the power heat sink 820 and the radiator 200. The power heat sink 820 is provided to improve the heat dissipation effect of the power board 810. The power board 810 is located between the radiator 200 and the power heat sink 820. This layout position can further improve the overall heat dissipation effect of the power board 810.

[0055] Specifically, the second fastener 330 is a screw. It is conceivable that the second fastener 330 may also be a rivet or other structure.

[0056] Specifically, the power board 810 is provided with a second plug-in portion, and the upper shell 110 and the lower shell 120 are both provided with a second plug-in slot 140 , and the second plug-in portion is plug-matched with the second plug-in slot 140 along the vertical direction.

[0057] Specifically, the power heat sink 820 is provided with a third plug-in portion, and both the upper shell 110 and the lower shell 120 are provided with a third plug-in slot 150 , and the third plug-in portion is plugged and matched with the third plug-in slot 150 in the vertical direction.

[0058] In the embodiment, a front cover 910 and a rear cover 920 are further included, the front cover 910 is located in front of the main housing 100, the front cover 910 is connected to the upper housing 110 and the lower housing 120 respectively, and the front cover 910 shields the first fastener 310, and the rear cover 920 is located behind the main housing 100, the rear cover 920 is connected to the upper housing 110 and the lower housing 120 respectively and shields the second fastener 330. The front cover 910 and the rear cover 920 are provided to prevent the first fastener 310 and the second fastener 330 from being exposed, so that the appearance of the lighting device is relatively complete.

[0059] Specifically, the upper shell 110 and the lower shell 120 are also connected and fixed by a third fastener. The third fastener is a screw, which has a simple structure and is easy to implement.

[0060] Specifically, the front cover 910 and the rear cover 920 are both fastened to the main housing 100 by screw connection.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lighting device with a heat sink, characterized in that: include: The main housing (100) comprises an upper housing (110) and a lower housing (120), wherein the upper housing (110) and the lower housing (120) are connected and enclosed to form a receiving cavity; A radiator (200) is located in the accommodating cavity, the rear end of the radiator (200) is vertically plugged into the lower shell (120), and the front end of the radiator (200) is respectively connected to the upper shell (110) and the lower shell (120) via a first fastener (310); The lamp body (400) is arranged at the front end of the heat sink (200).

2. The lighting device with a heat sink according to claim 1, characterized in that: A front clearance hole (101) is provided at the front end of the accommodating cavity, the front clearance hole (101) is communicated with the accommodating cavity, the radiator (200) is penetrated through the front clearance hole (101), the radiator (200) comprises a front plate portion (210), the front plate portion (210) is located at the front side of the front clearance hole (101), the front plate portion (210) is in contact with the front side wall of the main shell (100), and a partial projection of the front plate portion (210) along the front-to-back direction is located outside the front clearance hole (101).

3. The lighting device with a heat sink according to claim 2, characterized in that: The first fastener (310) is passed through the front plate portion (210) along the front-to-back direction and is connected to the front end of the main housing (100).

4. The lighting device with a heat sink according to claim 1, characterized in that: The left and right sides of the lower shell (120) are vertically provided with first plug-in slots (130), and the left and right sides of the radiator (200) are vertically provided with first plug-in strips (220), and the first plug-in strips (220) are plugged into the first plug-in slots (130) in a one-to-one correspondence; the lower shell (120) is installed with a limiting member (320), and the limiting member (320) abuts against the upper end of the first plug-in strip (220).

5. The lighting device with a heat sink according to claim 1, characterized in that: The heat dissipation device further comprises a fan (500), the upper shell (110) being provided with an upper air hole (111), the lower shell (120) being provided with a lower air hole (121), the radiator (200) being located between the upper air hole (111) and the lower air hole (121), the radiator (200) being provided with a heat dissipation channel extending vertically and opening at the top and the bottom, the fan (500) being arranged on one side of the radiator (200) along the vertical direction and being used for forming a vertical heat dissipation airflow in the upper air hole (111), the heat dissipation channel and the lower air hole (121).

6. The lighting device with a heat sink according to claim 5, characterized in that: The lower shell (120) is provided with two support bars (122), the two support bars (122) are arranged at intervals and support the lower end of the radiator (200), the middle area of ​​the lower end of the radiator (200) is suspended, and the fan (500) is located between the two support bars (122) and opposite to the middle area of ​​the lower end of the radiator (200).

7. The lighting device with a heat sink according to claim 5, characterized in that: A plurality of the lower air holes (121) are provided, and convex ribs (123) are provided around the openings of the lower air holes (121).

8. The lighting device with a heat sink according to claim 5, characterized in that: The invention also includes a lamp mounting frame (600) and a reinforcement member (700), wherein the upper shell (110) and the lower shell (120) are plastic parts, and the reinforcement member (700) is a metal part. The reinforcement member (700) is superimposed on the area of ​​the lower shell (120) where the lower air hole (121) is located, and the lamp mounting frame (600) is connected to the lower shell (120) and the reinforcement member (700).

9. The lighting device with a heat sink according to claim 1, characterized in that: The invention also includes a power module (800), wherein the power module (800) is arranged at the rear of the radiator (200) and is located in the accommodating cavity. The left and right sides of the power module (800) are respectively plugged into the upper shell (110) and the lower shell (120) in a vertical direction, and the rear end of the power module (800) is respectively connected to the upper shell (110) and the lower shell (120) through a second fastener (330); the power module (800) includes a power board (810) and a power heat dissipation board (820), and the rear end of the accommodating cavity is provided with a rear clearance hole (102), the power heat dissipation board (820) is located in the rear clearance hole (102), and the power board (810) is located between the power heat dissipation board (820) and the radiator (200).

10. The lighting device with a heat sink according to claim 9, characterized in that: It also includes a front cover (910) and a rear cover (920), wherein the front cover (910) is located in front of the main shell (100), and the front cover (910) is respectively connected to the upper shell (110) and the lower shell (120), and the front cover (910) covers the first fastener (310), and the rear cover (920) is located behind the main shell (100), and the rear cover (920) is respectively connected to the upper shell (110) and the lower shell (120) and covers the second fastener (330).