Direct insertion terminal type adjustable color die-casting LED down lamp

Abstract

The utility model relates to LED lighting technical field discloses a kind of adjustable color die-casting LED down lamp of straight insertion terminal, including lamp shell, reflector bowl and lamp body, the PCB board is fixed in the lamp shell inside by bolt;The wiring terminal and dial switch are integrally arranged on the PCB board and form integrated built-in drive of single wiring, the reflector bowl is embedded and is arranged in lamp shell lower end face opening place and is installed by the rotation clamping of three screw blocks of outer wall setting and the clamping block of lamp shell lower end opening inside setting, the lamp body is embedded and is arranged in lamp shell inside midpoint and is extruded and clamped by lamp shell and reflector bowl, heat insulation gasket is equipped between the PCB board and lamp shell, screw fixation simultaneously realizes electrical insulation and heat conduction.In the utility model, the multiple wiring process of the prior art by two red and black wires welded to the drive PCB board is solved, resulting in the problems of existing connection line virtual welding, false welding, electric shock, low installation efficiency, single color temperature, redundant structure and the like.

Description

Technical Field

[0001] This utility model relates to the field of LED lighting technology, and in particular to a direct-plug terminal type adjustable color die-cast LED downlight. Background Technology

[0002] In existing LED downlights, die-cast aluminum housings are widely used due to their excellent heat dissipation performance. However, their electrical connection methods still have the following shortcomings: 1. Defects in connection wires and soldering: In traditional solutions, the terminals are soldered to the drive PCB board via two red and black wires. This requires two soldering operations: one between the wires and the terminals, and another between the wires and the PCB. This easily leads to cold solder joints and false solder joints, and the wires themselves increase potential points of failure and contact resistance.

[0003] 2. Safety hazards exist: Under long-term operation or high current impact, the wire connection is prone to electric shock and arcing, especially inside the die-cast metal shell, where the risk is even higher after the insulation ages.

[0004] 3. Low installation efficiency: When electricians install on-site, they still need to strip, twist, or solder wires, which is cumbersome and inefficient.

[0005] 4. Structural redundancy: The drive circuit is often first installed in a separate plastic drive box and then placed in a die-cast housing, which increases the number of parts, assembly steps and raw material costs.

[0006] Therefore, this application provides a through-hole terminal type adjustable color die-cast LED downlight to solve the problems mentioned in the background art. Utility Model Content

[0007] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a direct-plug terminal type adjustable color die-cast LED downlight, which solves problems such as poor soldering / false soldering of connection wires, electric arcing, low installation efficiency, single color temperature, and redundant structure in existing technologies.

[0008] To achieve the above objectives, the present invention provides the following technical solution: A direct-plug terminal type adjustable color die-cast LED downlight includes a lamp housing, a reflector, and a lamp body. A PCB board is fixed inside the lamp housing by bolts. The PCB board integrates wiring terminals and DIP switches to form an integrated built-in driver for single wiring. The reflector is embedded in the opening on the lower end face of the lamp housing and is installed by rotating and snapping together with a locking block inside the opening on the lower end of the lamp housing through three screw blocks on the outer wall. The lamp body is embedded in the midpoint inside the lamp housing and is squeezed and clamped by the lamp housing and the reflector. A thermally conductive insulating pad is provided between the PCB board and the lamp housing. The screw fixing achieves both electrical insulation and heat conduction.

[0009] Furthermore, both sides of the outer wall of the lamp housing are equipped with retaining ring assemblies by fixing screws, and the lamp housing is provided with an installation chamber, and four screw posts are equally spaced around the top surface of the installation chamber for installing and fixing the PCB board.

[0010] Furthermore, a lens is also installed at the midpoint of the top surface of the reflector cup.

[0011] Furthermore, the lamp housing has an integrally formed terminal mounting groove on its side, and the wiring terminal is used to connect to an external AC or DC power supply. The wire inlet of the wiring terminal is exposed at a reserved opening on the lamp housing.

[0012] Furthermore, the wiring terminals are push-button or spring-loaded screwless terminals, and the external power supply wires are directly inserted into the terminals to complete the electrical connection.

[0013] Furthermore, a heat dissipation hole is provided at the outer edge of the top surface of the lamp housing.

[0014] Furthermore, the operating handle of the DIP switch passes through the lamp housing.

[0015] This utility model has the following beneficial effects: This utility model proposes a direct-plug terminal type adjustable color die-cast LED downlight: 1. By directly integrating the terminal blocks and DIP switches onto the PCB board, an integrated built-in driver design is achieved, requiring only one wiring connection. This eliminates the need for multiple wiring designs required by traditional multi-control boards, fundamentally avoiding issues such as cold solder joints and poor soldering caused by connecting wires. It also reduces electrical interfaces, eliminating the possibility of electric shock or arcing upon power-on, thus improving safety and reliability. Electricians do not need to strip, twist, or solder wires during installation; they simply insert the external wires directly into the terminal blocks, simplifying operation and improving installation efficiency.

[0016] 2. The die-cast housing simultaneously serves three functions: heat dissipation, structural support, and drive protection. This eliminates the need for a separate plastic driver box and internal connecting brackets, reducing the number of parts in the entire lamp and lowering raw material costs and assembly time.

[0017] 3. By directly fixing the PCB board to the metal pillars of the die-cast housing with screws, the heat generated by the drive circuit can be conducted to the die-cast housing for dissipation through the thermal pads and screws, which significantly improves the heat dissipation capacity compared to solutions with plastic housings or drive boxes. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the axial side structure of this utility model; Figure 2 This utility model Figure 1 A schematic diagram of the AA cross-sectional structure; Figure 3This utility model Figure 1 A schematic diagram of the structure viewed from below; Figure 4 This is a schematic diagram of the internal structure of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the internal structure of the present invention. Figure 2 .

[0019] Legend: 1. DIP switch; 2. Terminal block; 3. Lamp housing; 4. Snap ring assembly; 5. Fixing screw; 6. Screw post; 7. PCB board; 8. Reflector; 9. Lamp body; 10. Screw connector; 11. Lens. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Reference Figures 1-5 This utility model provides an embodiment of a direct-plug terminal type adjustable color die-cast LED downlight, including a lamp housing 3, a reflector 8, and a lamp body 9. A PCB board 7 is fixed inside the lamp housing 3 by bolts. The PCB board 7 is integrated with wiring terminals 2 and DIP switches 1 to form an integrated built-in drive for single wiring. The reflector 8 is embedded in the opening at the lower end face of the lamp housing 3 and is installed by rotating and snapping with the locking blocks inside the opening at the lower end face of the lamp housing 3 through three rotating blocks 10 on the outer wall. The lamp body 9 is embedded in the midpoint inside the lamp housing 3 and is squeezed and clamped by the lamp housing 3 and the reflector 8.

[0022] Specifically, the lamp housing 3 is made of die-cast aluminum alloy in one piece, with an external contour in the shape of a frustum and an internal mounting chamber in the shape of a cylindrical cavity. The four screw posts 6 are made of the same material as the lamp housing 3 and are integrally die-cast. Each screw post 6 has an internally threaded blind hole on its end face. The PCB board 7 has through holes at the four corners. Self-tapping screws are screwed into the internally threaded blind holes through the through holes to achieve a rigid connection between the PCB board 7 and the top wall of the lamp housing 3. The side wall of the lamp housing 3 has a rectangular notch at the position of the corresponding terminal 2 inlet. The size of the notch is larger than the inlet end face of the terminal 2 so that the power cord can enter from the outside. It can be directly inserted without additional drilling; the reflector cup 8 is a high-reflectivity PC material injection molded part, its inner wall is parabolic in shape, and three L-shaped screw blocks 10 are evenly distributed on the lower edge of the outer wall. The inner wall of the lower opening of the lamp housing 3 is provided with three arc-shaped locking blocks. After the screw blocks 10 are screwed in, they are axially locked by limiting the rotation angle; the lamp body 9 is an LED light source board. After the back is coated with thermal conductive silicone grease, it is attached to the center area of ​​the top wall of the installation chamber. After installation, the upper surface of the lamp body 9 is in close contact with the top wall, and the lower surface is pressed by the upper edge of the reflector cup 8, so that the lamp body 9 is clamped and fixed between the top wall of the lamp housing 3 and the reflector cup 8.

[0023] In one embodiment of this utility model, the outer walls of the lamp housing 3 are each equipped with a retaining spring assembly 4 by fixing screws 5; Specifically, the retaining spring assembly 4 consists of a steel retaining spring sheet and a fixing frame. Each of its two side wing plates has a through hole corresponding to the threaded fixing hole. The fixing screw 5 passes through the through hole and is screwed into the threaded fixing hole to lock the fixing frame to the outer wall of the lamp housing 3. The retaining spring sheet is a V-shaped elastic steel sheet, which is riveted to the fixing frame at its root. The free end opens outward and is provided with anti-slip teeth to provide outward clamping force when embedded in the ceiling opening. The center line connecting the two retaining spring assemblies 4 passes through the axis of the lamp housing 3 to ensure that the lamp housing 3 is balanced under force after installation.

[0024] In one embodiment of this utility model, a lens 11 is also installed at the midpoint of the top surface of the reflector cup 8; Specifically, the top surface of the reflector cup 8 has a circular recessed groove at its center, and the bottom of the recessed groove has a light-emitting through hole corresponding to the light-emitting surface of the lamp body 9; the lens 11 is injection molded from transparent optical grade PC or PMMA material, and its lower surface has an annular flange, which is fixed to the circular recessed groove by interference fit or ultrasonic welding; the upper surface of the lens 11 is a planar or microprism array structure, and the lower surface is a free-form surface, which is used to perform secondary light distribution on the light emitted by the lamp body 9 and adjust the beam angle and light spot uniformity.

[0025] In one embodiment of this utility model, the side of the lamp housing 3 is integrally formed with a terminal mounting groove; Specifically, the terminal mounting groove and the lamp housing 3 are integrally formed during die casting. The groove is located on the side wall of the lamp housing 3 near the edge of the PCB board 7. The bottom wall of the groove extends into the inner side of the mounting cavity and has a rectangular through hole for the terminal 2 to pass through. The outer port of the terminal mounting groove is provided with guide slopes around it to facilitate the insertion of external wires. The inner bottom wall of the groove is provided with positioning ribs on both sides. When the terminal 2 is soldered onto the PCB board 7, the positioning ribs cooperate with the grooves on both sides of the outer shell of the terminal 2 to prevent reverse insertion and limit the position, ensuring that the wire inlet of the terminal 2 is accurately aligned with the opening on the lamp housing 3.

[0026] In one embodiment of this utility model, the terminal 2 is a push-button or spring-loaded screwless terminal, and the external power supply wire is directly inserted into the terminal to complete the electrical connection. Specifically, terminal 2 is a push-button screwless terminal. Its housing contains a conductive copper sheet and a return spring, and the upper surface of the housing has a push button. When the button is pressed, the spring is compressed to open the copper sheet, and the external wire can be inserted into the inlet hole without resistance. After the button is released, the spring returns to its original position and the copper sheet clamps the wire core, realizing tool-free quick wiring. Alternatively, terminal 2 is a spring-loaded screwless terminal with a V-shaped elastic clip inside. When the wire is inserted, the clip is opened and then holds the wire by its own elastic restoring force. At the same time, the tail of the clip is soldered to the pad on the PCB board 7 for conduction. The terminal housing is made of flame-retardant nylon PA66 material, and its inner wall of the wire inlet hole is provided with anti-slip serrations to increase the holding force on the wire.

[0027] In one embodiment of this utility model, a thermally conductive insulating pad is provided between the PCB board 7 and the lamp housing 3, and the screw fixing achieves both electrical insulation and heat conduction. Specifically, the thermally conductive insulating pad is made of silicone substrate filled with alumina or boron nitride thermally conductive filler. Its shape matches the outline of the PCB board 7, and clearance holes are provided at the positions of the four screw posts 6. The pad has weak adhesion on both sides, with one side adhering to the top wall of the mounting cavity of the lamp housing 3 and the other side adhering to the back of the PCB board 7. When the screws are tightened on the PCB board 7, the pad is compressed evenly, which can efficiently conduct the heat generated by the electronic components on the PCB board 7 to the metal lamp housing 3 for heat dissipation, while ensuring electrical isolation between the PCB board 7 and the lamp housing 3.

[0028] In one embodiment of this utility model, a heat dissipation hole is provided at the outer edge of the top surface of the lamp housing 3; Specifically, the heat dissipation holes are multiple waist-shaped or circular through holes evenly distributed along the circumference of the top surface of the lamp housing 3. The number of through holes is 6 to 12, and each through hole connects the mounting chamber to the external environment. The heat dissipation holes are located away from the mounting areas of the screw post 6 and the lamp body 9. They are opened in the annular area near the outer edge of the top annular plane of the lamp housing 3 to form a convection channel. At the same time, the edges of the heat dissipation holes are provided with an upwardly protruding flange structure with a flange height of 1 to 3 mm, which can increase the heat dissipation area and prevent dust or foreign objects from falling directly into the mounting chamber.

[0029] In one embodiment of this utility model, the operating handle of the DIP switch 1 passes through the lamp housing 3; Specifically, an operation window is provided on the lamp housing 3 at a position corresponding to the DIP switch 1. The size of the window is adapted to the travel range of the operating handle of the DIP switch 1. The DIP switch 1 is soldered to the edge of the PCB board 7. The operating handle extends outward from the window, and the end of the operating handle is provided with anti-slip texture. The inner edge of the operation window is provided with sealing felt or silicone sealing ring to prevent light leakage and dust from entering. The operating handle extends out of the outer surface of the lamp housing 3 for easy finger operation by the user to quickly switch the color temperature or color level.

[0030] Working Principle: During installation, the external AC or DC power supply wire is first inserted into the inlet of the terminal block 2 through the terminal mounting slot on the side of the lamp housing 3. The elastic clamping structure inside the terminal block 2 automatically clamps the wire core, completing the electrical introduction. After the power supply is rectified and processed by the constant current drive circuit on the PCB board 7, it provides a stable operating current to the lamp body 9. As needed, the user can operate the DIP switch 1 extending from the lamp housing 3 to different positions. After receiving the position signal, the color temperature / color control chip on the PCB board 7 adjusts the current ratio of the LED beads of different colors or color temperatures output to the lamp body 9, so that the lamp body 9 emits light of the corresponding color temperature or color. The light emitted by the lamp body 9 first undergoes initial light distribution through the lens 11 to make the light spot more uniform and soft. Then it enters the reflector 8, and after being reflected by its parabolic inner wall, it is emitted downward at a specific beam angle to achieve efficient lighting. The heat generated by the driving components on the lamp body 9 and PCB board 7 is partially conducted to the top wall of the lamp housing 3 through the thermally conductive silicone grease on the back of the lamp body 9, and partially conducted to the entire lamp housing 3 through the thermally conductive insulating pad. Finally, it is dissipated to the surrounding environment through radiation and convection via the large heat dissipation surface on the outer wall of the lamp housing 3 and the heat dissipation holes on the top surface, ensuring the thermal stability of the product during long-term operation. The retaining spring assembly 4 is deformed under pressure during installation, and automatically resets and springs open after passing through the ceiling opening, clamping and fixing the lamp housing 3 to the ceiling; the reflector cup 8 is screwed and locked into the slot of the lamp housing 3 through the screw-fit block 10, while pressing and positioning the lens 11 and the lamp body 9.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A type of die-cast LED downlight with adjustable color temperature and a direct-plug terminal, comprising a lamp housing (3), a reflector (8), and a lamp body (9), characterized in that: The lamp housing (3) is fixed with a PCB board (7) by bolts. The PCB board (7) is integrated with a wiring terminal (2) and a DIP switch (1) to form an integrated built-in drive for single wiring. The reflector (8) is embedded in the opening of the lower end face of the lamp housing (3) and is installed by rotating and snapping with the locking block inside the opening of the lower end face of the lamp housing (3) through three screw blocks (10) set on the outer wall. The lamp body (9) is embedded in the middle of the lamp housing (3) and is squeezed and clamped by the lamp housing (3) and the reflector (8). A thermally conductive insulating pad is provided between the PCB board (7) and the lamp housing (3). The screw fixing realizes electrical insulation and heat conduction at the same time.

2. The through-hole terminal type adjustable color die-cast LED downlight according to claim 1, characterized in that: The lamp housing (3) has spring clip assemblies (4) installed on both sides of the outer wall by fixing screws (5). The lamp housing (3) has an installation chamber inside, and four screw posts (6) are arranged around the top surface of the installation chamber at equal intervals for installing and fixing the PCB board (7).

3. The through-hole terminal type adjustable color die-cast LED downlight according to claim 1, characterized in that: A lens (11) is also installed at the midpoint of the top surface of the reflector (8).

4. The through-hole terminal type adjustable color die-cast LED downlight according to claim 1, characterized in that: The lamp housing (3) has an integrally formed terminal mounting groove on its side. The wiring terminal (2) is used to connect to an external AC or DC power supply. The wire inlet of the wiring terminal (2) is exposed at the reserved opening on the lamp housing (3).

5. A through-hole terminal type adjustable color die-cast LED downlight according to claim 1, characterized in that: The terminal block (2) is a push-button or spring-loaded screwless terminal, and the external power supply wire is directly inserted into the terminal to complete the electrical connection.

6. A through-hole terminal type adjustable color die-cast LED downlight according to claim 1, characterized in that: The lamp housing (3) has heat dissipation holes at the outer edge of the top surface.

7. A through-hole terminal type adjustable color die-cast LED downlight according to claim 1, characterized in that: The operating handle of the DIP switch (1) passes through the lamp housing (3).

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