Projection lamp with secondary positioning and fixing lens bracket

Abstract

The utility model relates to the technical field of small projection lamps, in particular to a projection lamp with a secondary positioning and fixing lens support. Comprising a lens, a lens support, a PCB lamp panel and a lamp shell, the lens is installed in the lens support, the lens support and the PCB lamp panel are fixed through at least two screws, the PCB lamp panel is installed in the lamp shell, at least three triangular positioning columns are arranged at the end, close to the PCB lamp panel, of the lens support, and positioning holes corresponding to the triangular positioning columns are formed in the PCB lamp panel. During installation, secondary positioning is carried out on the lens support and the PCB lamp panel through the triangular positioning columns, and the situation that in the screw fixing and installing process, friction force is generated in the opposite angle fixing and rotating direction along the screw fixing and rotating direction, and consequently the lens support rotates and deviates relative to the PCB lamp panel is avoided.

Description

Technical Field

[0001] This utility model relates to the field of small floodlight technology, specifically to a floodlight with a secondary positioning and fixing lens bracket. Background Technology

[0002] In situations where the internal space of a small floodlight fixture with a large lens is limited, most existing technical solutions use adhesive to fix the lens bracket or use spring clips to fix the lens bracket to the light panel. These solutions have certain drawbacks in terms of the complexity of the process and the accuracy and reliability of the installation and positioning.

[0003] For example, the integrated molded lamp authorized by Chinese Patent Publication No. CN109237336B on March 22, 2024 includes a heat sink lamp housing, a lamp plate, a lens bracket, a retaining spring, a lens, and a reflector. The heat sink lamp housing has a mounting cavity, and the lamp plate, lens bracket, retaining spring, lens, and reflector are all located within the mounting cavity. The lamp plate is positioned and fixed on the heat sink lamp housing, the retaining spring is fixed on the lens bracket, the lens bracket is fixedly connected to the heat sink lamp housing, and there are at least three retaining springs spaced apart along the circumference of the lens bracket. The bottom of the reflector is sandwiched between the retaining springs, and the lens is sandwiched between the reflector and the lens bracket.

[0004] It is evident that it uses snap rings for secondary positioning of the lens bracket and the lamp board (usually a PCB board), which is a relatively complicated process and requires the addition of extra snap rings as secondary positioning accessories, resulting in higher costs. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is:

[0006] I. A lens bracket for secondary positioning and fixing is provided. By changing the shape of the lens bracket itself and cooperating with the unique shape of the PCB light board, secondary positioning is achieved to ensure the accuracy of lens installation and the stability of installation and fixing.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a floodlight with a secondary positioning and fixing lens bracket, comprising a lens, a lens bracket, a PCB lamp board, and a lamp housing. The lens is installed inside the lens bracket, and the lens bracket is fixed to the PCB lamp board by at least two screws. The PCB lamp board is installed inside the lamp housing. At least three triangular positioning posts are provided on one end of the lens bracket near the PCB lamp board, and positioning holes corresponding to the triangular positioning posts are provided on the PCB lamp board.

[0008] The triangular positioning posts are used to position the lens bracket on the PCB light board, ensuring that the relative position of the lens bracket remains unchanged during installation and is not altered by friction caused by the rotation direction of the screws. The triangular positioning posts also provide support, increasing the structural strength of the floodlight's internal support structure.

[0009] Optionally, the outer edge of the lens bracket extends toward the PCB lamp board with at least two fixed feet, and the fixed feet are provided with fixing holes for the screws to pass through.

[0010] Optionally, at least two of the aforementioned fixing holes are located at the same position from the center of the lens holder.

[0011] Optionally, a positioning step is provided at the end of the triangular positioning post.

[0012] The depth to which the triangular positioning pin enters the positioning hole is limited by the positioning step.

[0013] Optionally, there are three triangular positioning posts, which are distributed at 120° intervals around the center of the lens bracket.

[0014] Optionally, the lens has at least two positioning grooves on its outer edge, and the lens holder has positioning buckles corresponding to the positioning grooves.

[0015] The beneficial technical effect of this utility model is that during installation, the lens bracket and the PCB light board are repositioned by the triangular positioning post, which avoids friction force generated in the direction of rotation of the screw during diagonal fixing during screw fixing, thus preventing the lens bracket from rotating and shifting relative to the PCB light board. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the exploded structure of this utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the present invention.

[0018] Figure 3 This is a schematic diagram showing the connection between the lens holder and the lens of this utility model;

[0019] Figure 4 This is a cross-sectional view of the present invention from another direction.

[0020] Reference numerals: 1-Lens, 2-Lens bracket, 3-PCB lamp board, 4-Lamp housing, 5-Positioning groove, 6-Positioning buckle, 7-Fixing foot, 8-Fixing hole, 9-Screw, 10-Triangular positioning post, 11-Front heat dissipation hole, 12-Middle heat dissipation hole, 13-Rear heat dissipation hole. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0022] Reference Figure 1-4 As shown, a floodlight with a secondary positioning and fixing lens bracket includes a lens 1, a lens bracket 2, a PCB lamp board 3, and a lamp housing 4.

[0023] Lens 1 is installed inside lens holder 2. Two positioning grooves 5 are provided on the outer edge of lens 1, and positioning buckles 6 corresponding to the positioning grooves 5 are provided on lens holder 2.

[0024] The lens bracket 2 extends from its outer edge toward the PCB lamp board 3 with at least two fixing feet 7. Each fixing foot 7 has a fixing hole 8 for screws 9 to pass through. The lens bracket 2 is fixed to the PCB lamp board 3 by two screws 9. The fixing holes 8 are equidistant from the center of the lens bracket 2. The two fixing holes 8 are located on opposite sides.

[0025] The PCB lamp board 3 is installed inside the lamp housing 4. Three triangular positioning posts 10 are provided on one end of the lens bracket 2 near the PCB lamp board 3. Positioning holes corresponding to the triangular positioning posts 10 are provided on the PCB lamp board 3. Positioning steps are provided at the ends of the triangular positioning posts 10. There are three triangular positioning posts 10, which are distributed at 120° intervals around the center of the lens bracket 2.

[0026] The front of the lamp housing 4 is used to mount the lens 1, lens bracket 2, and PCB lamp board 3, while the rear has three layers of heat dissipation holes: a front heat dissipation hole 11, a middle heat dissipation hole 12, and a rear heat dissipation hole 13. The front and rear heat dissipation holes 11 and 13 are roughly triangular, while the middle heat dissipation hole 12 is hexagonal. There is a parting line in the middle of the heat dissipation holes, narrowing in the middle and widening at both ends, creating a large space at both ends and a narrow space in the middle. When air flows through the narrow middle section, the reduced cross-sectional area leads to an increased flow velocity. According to Bernoulli's equation, the increased flow velocity is accompanied by a decrease in static pressure, forming a local pressure gradient difference, which propels the fluid to accelerate through the contraction section, increasing the air velocity for better heat dissipation. When the floodlight is working, its heat is concentrated at the light-emitting point in the center of the PCB lamp board 3, causing the temperature at the parting line in the middle of the heat dissipation holes to rise the fastest. The air near this point is heated and rises, guiding the cooler air below to enter for heat dissipation.

[0027] Given the limited internal space of the lamp housing, the lens bracket 2 has a snap fastener 6 inside, and the lens 1 has a positioning groove 5 outside, which is installed with the snap fastener 6 of the lens bracket 2. The bottom of the lens bracket 2 has three triangular positioning posts 10 evenly distributed at 120°. The lens bracket 2 has corner screws 9 at opposite corners on both sides for fixing. Under the same size constraints, the installation accuracy and stability of the lens 1 are guaranteed, and the environmental performance of the product is improved by not using glue or other non-recyclable materials.

[0028] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A floodlight with a secondary positioning and fixing lens bracket, characterized in that, The device includes a lens, a lens bracket, a PCB light board, and a light housing. The lens is installed inside the lens bracket, and the lens bracket is fixed to the PCB light board by at least two screws. The PCB light board is installed inside the light housing. At least three triangular positioning posts are provided on the end of the lens bracket near the PCB light board, and positioning holes corresponding to the triangular positioning posts are provided on the PCB light board.

2. A floodlight with a secondary positioning and fixing lens bracket according to claim 1, characterized in that: The lens bracket has at least two fixed feet extending from its outer edge toward the PCB light board, and the fixed feet are provided with fixing holes for the screws to pass through.

3. A floodlight with a secondary positioning and fixing lens bracket according to claim 2, characterized in that: At least two of the aforementioned fixing holes are located at the same position from the center of the lens holder.

4. A floodlight with a secondary positioning and fixing lens bracket according to claim 1, characterized in that: The triangular positioning post is provided with a positioning step at its end.

5. A floodlight with a secondary positioning and fixing lens bracket according to claim 1, characterized in that: There are three triangular positioning posts, which are distributed at 120° intervals around the center of the lens bracket.

6. A floodlight with a secondary positioning and fixing lens bracket according to claim 1, characterized in that: The lens has at least two positioning grooves on its outer edge, and the lens holder has positioning buckles corresponding to the positioning grooves.

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