Lighting fixtures

Abstract

This application relates to a lighting fixture, comprising: a housing with a first through hole; a circuit board located inside the housing, the circuit board having a second through hole; an LED chip electrically connected to the circuit board and mounted on the side of the circuit board opposite to the first through hole; a sealing cover covering the side of the circuit board where the LED chip is located; a heat-conducting element with a hollow structure, one end located in the first through hole and the other end located in the second through hole; and a waterproof membrane covering the end of the heat-conducting element located in the first through hole. Through the first through hole, the second through hole, and the heat-conducting element, the air inside the sealing cover can exchange heat with the outside air. During heat exchange, the heat generated by the circuit board and the LED chip during operation is carried away. The heat-conducting element is in direct contact with the circuit board, minimizing the temperature difference between the circuit board, the LED chip, and the surface of the lighting fixture, thus extending the lifespan of the core electronic components. The waterproof membrane prevents external moisture from entering the sealing cover, avoiding corrosion of the circuit board and the LED chip, and extending their lifespan.

Description

Technical Field

[0001] This application relates to the technical field of luminaires, and in particular to lighting fixtures. Background Technology

[0002] Existing lighting fixtures suffer from poor heat dissipation. Circuit boards and LEDs generate heat during operation, causing their temperatures to rise. Heat transfer within the fixture's housing is slow. When the core is encapsulated with glue or lacks an efficient heat conduction path between the core and the outer shell, the heat generated by the circuit board or LEDs is difficult to transfer to the outside, hindering rapid cooling. Given the poor thermal conductivity of the lighting fixture's core, its temperature needs to be significantly higher than the outer surface temperature to achieve thermal equilibrium. Thermal equilibrium can be understood as maintaining a constant outer surface temperature while keeping the core heat source power constant. Higher core temperatures result in higher operating temperatures for the core electronic components. Since the operating temperature of electronic components is proportional to their lifespan, higher core temperatures tend to shorten the lifespan of the circuit board and LEDs, ultimately leading to a shorter lifespan for the entire lighting fixture. Summary of the Invention

[0003] Therefore, it is necessary to provide a lighting fixture that addresses the problem of poor heat dissipation in lighting fixtures.

[0004] A lighting fixture capable of being electrically connected to a cable, comprising:

[0005] The casing has a first through hole;

[0006] A circuit board is located inside the housing, and the circuit board has a second through hole;

[0007] The LED bead is electrically connected to the circuit board and is mounted on the side of the circuit board opposite to the first through hole;

[0008] A sealing cover is provided on the side of the circuit board where the LED beads are located, and the LED beads are also covered.

[0009] The heat-conducting element has a hollow structure, with one end located in the first through hole and the other end located in the second through hole; and

[0010] A waterproof membrane covers one end of the heat-conducting element located at the first through hole;

[0011] Through the first through hole, the second through hole, and the heat-conducting element, the air inside the sealing cover can exchange heat with the outside air.

[0012] In one embodiment, a first adhesive layer is included, located on the side of the circuit board where the sealing cap is located, the sealing cap protruding from the first adhesive layer.

[0013] In one embodiment, the housing includes a peripheral shell and a bottom shell; the lighting fixture includes a second adhesive layer located between the bottom shell and the circuit board, the second adhesive layer surrounding the thermally conductive element.

[0014] In one embodiment, a cover is included, the cover being located on the side of the sealing cap opposite to the circuit board, the cover covering the housing.

[0015] In one embodiment, the heat-conducting element has a stepped cylindrical structure, and the heat-conducting element includes a first end and a second end, the diameter of the second end being smaller than the diameter of the first end; the first end is fixed to the first through hole, and the second end is fixed to the second through hole.

[0016] In one embodiment, the housing is formed of an aluminum shell and a plastic shell, with the plastic shell enclosing a portion of the structure of the aluminum shell.

[0017] In one embodiment, the housing includes a bottom shell and a peripheral shell, and the first through hole is formed in the bottom shell;

[0018] The aluminum shell includes a first bottom wall and a first peripheral wall, and the plastic shell includes a second bottom wall and a second peripheral wall. The first bottom wall and the second bottom wall together form the bottom shell, and a portion of the structure of the first bottom wall is wrapped by the second bottom wall. The first peripheral wall and the second peripheral wall together form the peripheral shell, and a portion of the structure of the first peripheral wall is wrapped by the second peripheral wall.

[0019] In one embodiment, the portion of the first bottom wall not covered by the second bottom wall has a groove, and / or, the portion of the first peripheral wall not covered by the second peripheral wall has a groove.

[0020] In one embodiment, the first through hole is a stepped circular hole with a first diameter at the first bottom wall, and the second through hole has a second diameter at the second bottom wall. The first diameter is smaller than the second diameter, and the end of the heat-conducting element abuts against the first bottom wall.

[0021] In one embodiment, the housing has a through hole, through which the cable passes and is electrically connected to the circuit board, and the cable is sealed to the wall of the through hole.

[0022] The aforementioned lighting fixture includes a housing, a circuit board, LED chips, a sealing cover, a heat-conducting element, and a waterproof membrane. The sealing cover covers the circuit board and the LED chips. A first through-hole is formed in the housing, and a second through-hole is formed in the circuit board. One end of the hollow heat-conducting element is fixed to the first through-hole, and the other end is fixed to the second through-hole, allowing air inside the sealing cover to convect with the outside air, thus exchanging heat and carrying away the heat generated by the circuit board and LED chips during operation. The heat-conducting element is in direct contact with the circuit board, and its superior thermal conductivity makes the temperature of the circuit board and LED chips closer to the surface temperature of the lighting fixture, with a smaller or nearly identical temperature difference. This significantly extends the lifespan of the electronic components in the core of the lighting fixture, thereby extending the overall lifespan of the lighting fixture. A waterproof membrane is provided between the first end and the first bottom wall to prevent external moisture from entering the interior of the sealing cover, avoiding corrosion of the circuit board and LED chips, and extending their service life. Attached Figure Description

[0023] Figure 1 A partial exploded view of a lighting fixture provided in one embodiment;

[0024] Figure 2 for Figure 1 A further exploded view of the lighting fixture shown;

[0025] Figure 3 for Figure 2 A further exploded view of the lighting fixture shown;

[0026] Figure 4 for Figure 1 A three-dimensional view of the connecting buckle of the lighting fixture shown;

[0027] Figure 5 for Figure 1 A perspective view of the housing of the lighting fixture shown at an angle;

[0028] Figure 6 for Figure 1 A perspective view of the housing of the lighting fixture shown from another angle;

[0029] Figure 7 for Figure 5 Exploded view of the shell shown;

[0030] Figure 8 for Figure 1 A cross-sectional view of a portion of the structure of the lighting fixture shown. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0037] Existing lighting fixtures have poor heat dissipation. When the circuit board or LED beads of the lighting fixture are working, they generate heat, which causes the temperature of the circuit board and LED beads to rise. The heat is slowly transferred through the air or objects inside the housing of the lighting fixture, which prevents the circuit board and LED beads from cooling down quickly, resulting in a short lifespan for the circuit board and LED beads.

[0038] Addressing the shortcomings of poor heat dissipation in existing lighting fixtures 10, this application provides a lighting fixture 10 that incorporates a heat-conducting element 600 and a sealing cover 300 within its housing 800. The heat-conducting element 600 is hollow and connects to the internal space of the sealing cover 300, allowing heat exchange between the air inside the sealing cover 300 and the outside air. This rapidly transfers heat generated by the circuit board 400 and the LED beads 500 to the outside of the lighting fixture 10, quickly lowering their temperature and extending their lifespan. A waterproof membrane 700 is provided on the heat-conducting element 600 to prevent external moisture from entering the sealing cover 300 through the hollow structure of the heat-conducting element 600 and corroding the circuit board 400 or LED beads 500, further extending their lifespan.

[0039] See Figure 1 and Figure 2 Figure 1 shows a partial exploded view of a lighting fixture 10 according to an embodiment of this application. Figure 2 It shows Figure 1A further exploded view of the lighting fixture 10 shown. The lighting fixture 10 includes a housing 800, a cover 100, a sealing cover 300, a circuit board 400, LED chips 500, and a first adhesive layer 200. The cover 100 covers the housing 800, such that the cover 100 and the housing 800 form an installation space. The housing 800 and the cover 100 together form the outer shell of the lighting fixture 10. The sealing cover 300, circuit board 400, LED chips 500, and first adhesive layer 200 are located within the installation space. It can be understood that the housing 800 has an open box-like structure, and the cover 100 has a sheet-like structure, with the cover 100 covering the opening of the housing 800, i.e., the sealing cover 300, circuit board 400, LED chips 500, and first adhesive layer 200 are located inside the housing 800. The lighting fixture 10 can be connected to an external power source via a cable 900. The cable 900 passes through a through-hole 802 in the housing 800, and the cable 900 is sealed to the wall of the through-hole 802. The cable 900 can supply power to the LED chip 500 through the circuit board 400, thereby enabling the LED chip 500 to emit light. On the other hand, the sealed fit between the cable 900 and the wall of the through-hole 802 prevents adhesive from flowing out from the cable 900 when glue is poured into the housing 800, thus preventing glue leakage from the housing 800.

[0040] In one embodiment, the cover 100 is made of a transparent polymer material, and the light transmittance of the cover 100 is not less than 70%. This allows the light emitted by the LED 500 to pass through the cover 100 and enter the external environment.

[0041] Figure 3 An exploded view of a lighting fixture 10 according to an embodiment of this application is shown. (In conjunction with...) Figures 1 to 3 The housing 800 is an open, disc-shaped structure, including a peripheral shell 820 and a bottom shell 810. The peripheral shell 820 extends from the edge of the bottom shell 810 and is perpendicular or substantially perpendicular to the bottom shell 810. The lighting fixture 10 includes two perpendicular directions: length, width, and thickness. The length direction is along the Y direction, the width direction is along the X direction, and the thickness direction is along the Z direction. The cable 900 extends along the Y direction into the interior of the housing 800 and is electrically connected to the circuit board 400, thereby supplying power to the lamp chip 500.

[0042] In the Z direction, the bottom shell 810, circuit board 400, first adhesive layer 200, sealing cover 300, and cover body 100 are arranged sequentially. LED beads 500 are mounted on the side of the circuit board 400 facing away from the bottom shell 810. The number of LED beads 500 can be one or more, without specific limitation. The sealing cover 300 has an open box-shaped structure, covering the side of the circuit board 400 where the LED beads 500 are located, and is sealed to the circuit board 400. All LED beads 500 are located within the sealing cover 300. In the XY plane, the projected area of ​​the sealing cover 300 is smaller than the projected area of ​​the circuit board 400, and the projection of the sealing cover 300 in the XY plane lies within the projection of the circuit board 400 in the XY plane. A first adhesive layer 200 is provided on the side of the circuit board 400 where the sealing cover 300 is located. The sealing cover 300 passes through and protrudes from the first adhesive layer 200, meaning the first adhesive layer 200 surrounds the outer periphery of the sealing cover 300 and covers the portion of the circuit board 400 not covered by the sealing cover 300. The first adhesive layer 200 fixes the sealing cover 300 to the circuit board 400 and provides a sealed connection between the sealing cover 300 and the circuit board 400, preventing external moisture from entering the sealing cover 300 and causing short circuits or corrosion to the circuit board 400, LED beads 500, or other electronic components, thus extending the service life of the circuit board 400.

[0043] In one embodiment, the sealing cover 300 is made of a transparent polymer material, and the light transmittance of the cover 100 is not less than 70%. This allows the light emitted by the LED 500 to pass through the cover 100 and enter the external environment.

[0044] The cable 900 passes through a through-hole 802 in the housing 800 and extends into the mounting space. It is located on the side of the adhesive layer facing the bottom housing 810, meaning the portion of the cable 900 within the mounting space is on the same side of the adhesive layer as the circuit board 400. The cable 900 is electrically connected to the circuit board 400. The cable 900 has a long, strip-shaped structure and is positioned along the Y-direction.

[0045] Figure 4 A perspective view of a connecting buckle 860 according to an embodiment of this application is shown. (In conjunction with...) Figures 2 to 4 As shown, in one embodiment, the housing 800 includes a mounting portion 843 and a connecting buckle 860. The mounting portion 843 is located in the peripheral housing 820. The connecting buckle 860 cooperates with the mounting portion 843 to form a through hole 802. The through hole 802 can be sealed to the cable 900, so that during the subsequent process of potting glue to form an adhesive layer, the adhesive can be prevented from flowing out of the housing 800 from the through hole 802.

[0046] In one embodiment, the connector 860 is molded separately, for example, by injection molding from molten polymer material. The separate fabrication of the connector 860 ensures good precision. The mounting portion 843, located on the housing 800, can be manufactured by injection molding, which is convenient and results in high injection molding precision. This leads to good fit between the high-precision connector 860 and the mounting portion 843, resulting in a better sealing effect between the connector 860 and the housing 800 and the cable 900.

[0047] In one embodiment, one of the mounting part 843 and the connecting buckle 860 is provided with a snap-fit ​​(not shown), and the other is provided with a slot (not shown). The mounting part 843 and the connecting buckle 860 are anti-detached through the snap-fit ​​and the slot. It can be understood that after the snap-fit ​​and the slot are engaged, the wall of the hole 802 formed by the mounting part 843 and the connecting buckle 860 can press the cable 900 tightly, so that the wall of the hole 802 and the cable 900 can be sealed together, ensuring that the housing 800 will not leak glue at the hole 802.

[0048] like Figure 3 and Figure 4 As shown, in one embodiment, the mounting portion 843 has a first protrusion 844 on the side facing the connecting buckle 860, and the connecting buckle 860 has a second protrusion 861 on the side facing the mounting portion 843. The first protrusion 844 is perpendicular to the Y direction, and the second protrusion 861 is perpendicular to the Y direction. When the mounting portion 843 and the connecting buckle 860 are assembled, the ends of the first protrusion 844 and the second protrusion 861 are engaged, so that the inner surface of the hole wall has continuous protrusions. It can be understood that there are two or more first protrusions 844, which are generally parallel to each other; there are two or more second protrusions 861, which are generally parallel to each other, and the number of first protrusions 844 and second protrusions 861 is equal. When the cable 900 passes through the through hole 802, the first protrusion 844 and the second protrusion 861 together surround the outer periphery of the cable 900 and are interference-fitted with the outer surface of the cable 900, so that the first protrusion 844 and the second protrusion 861 together press the cable 900. It is understandable that when the first protrusion 844 and the second protrusion 861 press the cable 900 together, the cable 900 may undergo a certain deformation. The space between adjacent first protrusions 844 or adjacent second protrusions 861 provides space to accommodate the deformation of the cable 900.

[0049] In one embodiment, there are two mounting parts 843 and two connecting buckles 860, located at both ends of the housing 800, so that cables 900 can extend into the mounting space from both ends of the housing 800 to supply power to the circuit board 400 and the LED beads 500.

[0050] Figure 5 A perspective view of the housing 800 at an angle is shown in one embodiment of this application; Figure 6A perspective view of the housing 800 in one embodiment of this application is shown from another angle; Figure 7 An exploded view of the aluminum shell 830 and the plastic shell 840 of the housing 800 in one embodiment of this application is shown.

[0051] Combination Figures 5 to 7 As shown, in one embodiment, the housing 800 includes an aluminum shell 830 and a plastic shell 840. The aluminum shell 830 has a shell-like structure with discontinuous peripheral walls, and the plastic shell 840 has a frame structure. At least a portion of the structure of the aluminum shell 830 is enclosed by the plastic shell 840, forming a complete housing 800. The aluminum shell 830 enhances the heat dissipation effect of the housing 800, allowing the heat generated by the circuit board 400 and the LED beads 500 during operation to be quickly dissipated through the aluminum shell 830, thereby improving the service life of the circuit board 400 and the LED beads 500. The mounting part 843 is located on the plastic shell 840. The plastic shell 840 is easy to process and has high processing precision, giving the mounting part 843 high precision, thus enabling a sealed fit with the cable 900 together with the connecting buckle 860. The plastic shell 840 encloses part of the structure of the aluminum shell 830, making the aluminum shell 830 less susceptible to wear. The plastic shell 840 has good wear resistance, thus giving the housing 800 good wear resistance.

[0052] Combination Figures 5 to 7 As shown, in one embodiment, the aluminum shell 830 includes a first bottom wall 831 and a first peripheral wall 832. The first peripheral wall 832 extends from the edge of the first bottom wall 831 and is perpendicular or substantially perpendicular to the first bottom wall 831. The first peripheral wall 832 is a discontinuous structure. In another embodiment, the first peripheral wall 832 may also be a continuous structure. The plastic shell 840 includes a second bottom wall 841 and a second peripheral wall 842. The second peripheral wall 842 extends from the edge of the second bottom wall 841 and is perpendicular or substantially perpendicular to the second bottom wall 841. The mounting portion 843 is located on the second peripheral wall 842. The first bottom wall 831 and the second bottom wall 841 together form a bottom shell 810, and the first peripheral wall 832 and the second peripheral wall 842 together form a peripheral shell 820. The plastic shell 840 has a frame structure. The area of ​​the second bottom wall 841 is smaller than that of the first bottom wall 831, so that only a portion of the first bottom wall 831 is enclosed by the second bottom wall 841, while the rest is exposed, facilitating heat dissipation of the lighting fixture 10. Similarly, a portion of the first peripheral wall 832 is enclosed by the second peripheral wall 842, while the rest is exposed, which also facilitates heat dissipation of the lighting fixture 10.

[0053] Combination Figures 5 to 7As shown, in one embodiment, the second bottom wall 841 covers one side of the outer surface of a portion of the structure of the first bottom wall 831, and the second peripheral wall 842 covers one side of the outer surface of the first peripheral wall 832; in another embodiment, the second bottom wall 841 covers one side of the inner surface of a portion of the structure of the first bottom wall 831, and the second peripheral wall 842 covers one side of the inner surface of a portion of the structure of the first peripheral wall 832. In another embodiment, the second bottom wall 841 and the second peripheral wall 842 are both double-layered structures with intervals. The first bottom wall 831 is located between the two layers of the second bottom wall 841. The second bottom wall 841 covers both sides of the inner and outer surfaces of part of the structure of the first bottom wall 831. The inner and outer surfaces of the first bottom wall 831 covered by the second bottom wall 841 may overlap or not overlap. If they do not overlap, it means that the double-layered second bottom wall 841 is misaligned on the inner and outer surfaces of the first bottom wall 831. The first peripheral wall 832 is located between the two layers of the second peripheral wall 842. The second peripheral wall 842 covers both sides of the inner and outer surfaces of the first peripheral wall 832. The inner and outer surfaces of the first peripheral wall 832 covered by the second peripheral wall 842 may overlap or not overlap. If they do not overlap, it means that the second peripheral wall 842 is misaligned on the inner and outer surfaces of the first peripheral wall 832.

[0054] In one embodiment, the first bottom wall 831 is a circular sheet structure, and the outer surface of the edge of the first bottom wall 831 is covered by the second bottom wall 841 to prevent the edge of the first bottom wall 831 from being worn. The outer surfaces of both ends of the first peripheral wall 832 are wrapped by the second peripheral wall 842 to prevent wear and enhance the strength of the shell 800. In another embodiment, the inner and outer surfaces of the edge of the first bottom wall 831 are covered by the second bottom wall 841 to enhance the strength of the shell 800; the inner and outer surfaces of both ends of the first peripheral wall 832 are covered by the second peripheral wall 842 to enhance the strength of the shell 800. It is understood that the plastic shell 840 is a frame structure, which can enhance the strength of the shell 800, and the plastic shell 840 does not completely cover the aluminum shell 830 to avoid affecting the heat dissipation of the aluminum shell 830, so that the shell 800 has good heat dissipation effect even with high strength.

[0055] Combination Figures 5 to 7 As shown, in one embodiment, the exposed portion of the first bottom wall 831 is provided with a groove 833. The groove 833 can be recessed into the inside of the housing 800 or into the outside of the housing 800 to increase the surface area of ​​the aluminum housing 830 and improve the heat dissipation effect of the aluminum housing 830. The exposed portion of the first peripheral wall 832 is provided with a groove 833. The groove 833 can be recessed into the inside of the housing 800 or into the outside of the housing 800 to increase the surface area of ​​the aluminum housing 830 and improve the heat dissipation effect of the aluminum housing 830.

[0056] Combination Figures 5 to 7As shown, in one embodiment, the bottom shell 810 has a first through hole 801, which is a circular stepped hole. The first through hole 801 has a first diameter at the first bottom wall 831 and a second diameter at the second bottom wall 841, wherein the first diameter is smaller than the second diameter.

[0057] Figure 8 This diagram illustrates the assembly of the thermally conductive element 600 with the aluminum casing 830 and the circuit board 400 in one embodiment of this application. Figure 2 and Figure 8 As shown, in one embodiment, a second through hole 410 is provided on the circuit board 400. The lighting fixture 10 includes a heat-conducting element 600. The heat-conducting element 600 is a hollow cylindrical structure with a stepped shape, including a first end 610 and a second end 620, the diameter of the second end 620 being smaller than the diameter of the first end 610. The first end 610 is fixed to the first through hole 801, the end face of the first end 610 abuts against the inner surface of the first bottom wall 831, and the hole wall of the first through hole 801 surrounds the outer peripheral surface of the first end 610 at the plastic shell 840, thereby restricting the movement of the heat-conducting element 600 at the first through hole 801. The second end 620 passes through the second through hole 410 and is fixed to the second through hole 410, and the end of the second end 620 away from the first end 610 is flush with the surface of the circuit board 400, protrudes from the circuit board 400, or is recessed into the circuit board 400. The heat-conducting element 600 allows outside air to enter the sealing cover 300, thereby enabling the air inside the sealing cover 300 to exchange heat with the outside air and carry away the heat generated by the circuit board 400 or the LED 500 during operation.

[0058] It is understandable that circuitry is arranged on the circuit board 400. To avoid the second end 620 occupying too much space on the circuit board 400, the diameter of the second end 620 is set to be smaller than the diameter of the first end 610. That is, the heat-conducting element 600 is a stepped cylindrical structure. Thus, when the diameter of the second through hole 410 is small, the second end 620 can pass through, thereby saving space on the circuit board 400. Secondly, the stepped cylindrical structure of the heat-conducting element 600 increases the surface area of ​​the heat-conducting element 600 and improves its heat dissipation effect. In another embodiment, the heat-conducting element 600 can also be set as a cylindrical structure, with the diameter of the first end 610 equal to the diameter of the second end 620.

[0059] In one embodiment, a second adhesive layer (not shown) is provided between the bottom shell 810 and the circuit board 400. The second adhesive layer surrounds the heat-conducting element 600, meaning that the outer peripheral surface of the heat-conducting element 600 is in contact with the second adhesive layer. Part of the heat generated by the circuit board 400 and the LED beads 500 is directly transferred to the heat-conducting element 600, and another part is transferred to the heat-conducting element 600 through the second adhesive layer, allowing a portion of the heat generated by the circuit board 400 and the LED beads 500 to be transferred to the external environment through the heat-conducting element 600. The remaining heat generated by the circuit board 400 and the LED beads 500 is transferred to the external environment through the aluminum shell 830. The combined effect of the heat-conducting element 600 and the aluminum shell 830 of the housing 800 provides good heat dissipation for the lighting fixture 10.

[0060] In one embodiment, the second adhesive layer has a high thermal conductivity, which allows the heat generated by the circuit board 400 and the LED 500 to be transferred to the heat-conducting element 600 or the aluminum shell 830 more quickly, thereby enabling the circuit board 400 and the LED 500 to cool down more quickly.

[0061] In one embodiment, the lighting fixture 10 includes a waterproof membrane 700 located at the end of the first end 610 opposite to the second end 620. Specifically, the waterproof membrane 700 can be installed inside the hollow structure of the first end 610, or between the end face of the first end 610 and the first bottom wall 831. Both installations prevent external moisture from entering the sealing cover 300 through the hollow structure of the heat-conducting element 600, while allowing external air to enter the sealing cover 300 through the hollow structure of the heat-conducting element 600. In other words, the waterproof membrane 700 prevents the circuit board 400 and the LED beads 500 from contacting water, while also allowing heat exchange between the air inside the sealing cover 300 and the external air, thereby carrying away the heat generated by the circuit board 400 and the LED beads 500 during operation.

[0062] Understandably, the first adhesive layer 200, the second adhesive layer, the sealing cap 300, and the waterproof membrane 700 completely enclose the circuit board 400, preventing external moisture from contacting the circuit board 400 and the LED beads 500, thus avoiding corrosion of the circuit board 400 and the LED beads 500 and shortening their lifespan.

[0063] In one embodiment, when the lighting fixture 10 is in operation, the circuit board 400 and the LED beads 500 generate heat. This heat is transferred to the heat-conducting element 600 and the aluminum shell 830 through the first adhesive layer 200 and the second adhesive layer. Outside air can enter the hollow interior of the heat-conducting element 600 through the first through-hole 801 and the waterproof membrane 700, then enter the sealing cover 300, flow within the sealing cover 300, and then flow back into the hollow interior of the heat-conducting element 600, carrying away the heat generated by the circuit board 400 and the LED beads 500 and lowering their temperature.

[0064] In one embodiment, the heat-conducting element 600 is made of gold or other materials with high thermal conductivity, without being specifically limited here.

[0065] In one embodiment, a method for manufacturing a lighting fixture 10 is provided. A heat-conducting element 600 and a waterproof membrane 700 are fixed in a first through hole 801, with the waterproof membrane 700 located between the end face of the first end 610 and the first bottom wall 831. A cable 900 is electrically connected to a circuit board 400 equipped with LED beads 500. The circuit board 400 is installed inside a housing 800, with the second end 620 passing through the second through hole 410 of the circuit board 400. The cable 900 is placed inside a mounting portion 843. A connecting buckle 860 is fastened to the mounting portion 843 via a snap-fit ​​and a slot, ensuring a stable fit between the mounting portion 843 and the connecting buckle 860. The first protrusion 844 and the second protrusion 861 on the wall of the through hole 802 formed by the mounting portion 843 and the connecting buckle 860 press against the cable 900, ensuring a sealed fit between the through hole 802 and the cable 900, thereby preventing adhesive leakage from the housing 800 at the through hole 802. A sealing cover 300 is placed over the side of the circuit board 400 where the LED beads 500 are located, and the sealing cover 300 covers all the LED beads 500. Adhesive is injected into the housing 800, filling the space between the outer periphery of the sealing cover 300 and the inner surface of the housing 800 with adhesive. Some adhesive may flow between the circuit board 400 and the bottom shell 810, forming a first adhesive layer 200 on the outer periphery of the sealing cover 300 and a second adhesive layer between the circuit board 400 and the bottom shell 810, with the second adhesive layer surrounding the heat-conducting element 600. The first adhesive layer 200, the sealing cover 300, the second adhesive layer, and the waterproof membrane 700 completely isolate the circuit board 400 from external moisture. The housing 800 is covered by a cover 100, thus obtaining the lighting fixture 10 of this application.

[0066] The lighting fixture 10 of this application has a first through hole 801 on the bottom shell 810 and a second through hole 410 on the circuit board 400, with a sealing cover 300 covering the circuit board 400. A hollow heat-conducting element 600 is fixed at one end to the first through hole 801 and at the other end to the second through hole 410, allowing air inside the sealing cover 300 to convect with the outside air and exchange heat, thereby removing the heat generated by the circuit board 400 and the LED beads 500 during operation. The heat-conducting element 600 is in direct contact with the circuit board 400, and its superior thermal conductivity makes the temperature of the circuit board 400 and the LED beads 500 closer to the surface temperature of the lighting fixture 10, with a smaller or nearly identical temperature difference. This significantly extends the working life of the electronic components in the core of the lighting fixture 10, and thus extends the overall lifespan of the lighting fixture 10. A waterproof membrane 700 is provided between the first end 610 and the first bottom wall 831 to prevent external moisture from entering the interior of the sealing cover 300, thus avoiding corrosion of the circuit board 400 and the LED beads 500 and extending their service life. Because the heat-conducting element and the waterproof membrane allow the sealing cover 300 to communicate with the outside, the air pressure inside the sealing cover 300 is approximately equal to the outside air pressure. This prevents deformation of the sealing cover 300 due to a pressure difference, further preventing the sealing cover 300 from detaching from the first adhesive layer 200 and causing sealing failure.

[0067] Furthermore, the housing 800 is formed by an aluminum housing 830 and a plastic housing 840. Part of the structure of the aluminum housing 830 is wrapped by the plastic housing 840, while the rest of the structure is not wrapped by the plastic housing 840. This allows the lighting fixture 10 to dissipate heat through the unwrapped part of the aluminum housing 830, thereby improving the heat dissipation efficiency of the lighting fixture 10.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A lighting fixture capable of being electrically connected to a cable, characterized in that, include: The casing has a first through hole; A circuit board is located inside the housing, and the circuit board has a second through hole; The LED bead is electrically connected to the circuit board and is mounted on the side of the circuit board opposite to the first through hole; A sealing cover is provided on the side of the circuit board where the LED beads are located, and the LED beads are also covered. The heat-conducting element has a hollow structure, with one end located in the first through hole and the other end located in the second through hole; the heat-conducting element has a stepped cylindrical structure, and the heat-conducting element includes a first end and a second end, the diameter of the second end being smaller than the diameter of the first end; the first end is fixed to the first through hole, and the second end is fixed to the second through hole. A waterproof membrane covers one end of the heat-conducting element located at the first through-hole; through the first through-hole, the second through-hole, and the heat-conducting element, the air inside the sealing cover can exchange heat with the outside air; and A cover body located on the side of the sealing cover opposite to the circuit board, the cover body covering the housing.

2. The lighting fixture according to claim 1, characterized in that, It includes a first adhesive layer located on the side of the circuit board where the sealing cap is located, and the sealing cap protrudes from the first adhesive layer.

3. The lighting fixture according to claim 1, characterized in that, The housing includes a peripheral shell and a bottom shell; the lighting fixture includes a second adhesive layer located between the bottom shell and the circuit board, and the second adhesive layer surrounds the heat-conducting element.

4. The lighting fixture according to any one of claims 1 to 3, characterized in that, The housing is formed of an aluminum shell and a plastic shell, with the plastic shell enclosing a portion of the aluminum shell structure.

5. The lighting fixture according to claim 4, characterized in that, The housing includes a bottom shell and a peripheral shell, and the first through hole is formed in the bottom shell; The aluminum shell includes a first bottom wall and a first peripheral wall, and the plastic shell includes a second bottom wall and a second peripheral wall. The first bottom wall and the second bottom wall together form the bottom shell, and a portion of the structure of the first bottom wall is wrapped by the second bottom wall. The first peripheral wall and the second peripheral wall together form the peripheral shell, and a portion of the structure of the first peripheral wall is enclosed by the second peripheral wall.

6. The lighting fixture according to claim 5, characterized in that, The portion of the first bottom wall not covered by the second bottom wall has a groove, and / or the portion of the first peripheral wall not covered by the second peripheral wall has a groove.

7. The lighting fixture according to claim 5, characterized in that, The first through hole is a stepped circular hole with a first diameter at the first bottom wall, and the second through hole has a second diameter at the second bottom wall. The first diameter is smaller than the second diameter, and the end of the heat-conducting element abuts against the first bottom wall.

8. The lighting fixture according to any one of claims 1 to 3, characterized in that, The housing has a through hole, through which the cable passes and is electrically connected to the circuit board, and the cable is sealed to the wall of the through hole.

Images