CN209926107U

CN209926107U - LED floodlight

Info

Publication number: CN209926107U
Application number: CN201920826084.2U
Authority: CN
Inventors: 林燕丹; 井硕
Original assignee: Fudan University
Current assignee: Fudan University
Priority date: 2019-06-03
Filing date: 2019-06-03
Publication date: 2020-01-10
Anticipated expiration: 2029-06-03

Abstract

The utility model belongs to the technical field of the illumination, specifically be a LED floodlight. The LED floodlight structure comprises a shell, a PCB (printed Circuit Board), an LED light source, a bracket, an inner curved surface lens, a sealing gasket, a gland and a fastener; the LED light source, the PCB and the inner curved surface light distribution lens form an optical assembly; the LED light sources form an array and are welded on the PCB to form a series-parallel structure; the PCB is fixed on the shell and positioned in the groove at the bottom of the bracket; the inner curved surface light distribution lens is made of glass and is rectangular, the incident surface is an array formed by a plurality of curved surface light distribution units, and the emergent surface is a plane and is positioned in a groove at the top of the bracket; the gland presses the gasket against the housing. The utility model discloses an inner curved surface lens carries out the secondary grading design to the LED light source, under the prerequisite that satisfies product operation requirement and relevant standard, simplifies structural design, improves the part commonality, reduces size sensitivity, reduces processing cost and assembly cost, and this LED floodlight has higher practicality.

Description

LED floodlight

Technical Field

The utility model belongs to the technical field of the illumination, concretely relates to LED floodlight.

Background

Floodlights are light fixtures that illuminate objects uniformly from a particular point in all directions and can be placed anywhere in a scene for floodlighting. As a flood lighting fixture, the fixture performance has a great impact on the final lighting effect. The structural design and the optical design of the lamp are important for reducing the design, production, maintenance and other costs.

The traditional floodlight usually adopts a metal halide lamp, a high-pressure sodium lamp, an electrodeless lamp and the like as light sources, has small light-emitting area and reduces the uniformity of floodlighting. The utility model adopts the LED as the light source, compared with the traditional light source LED light source, the LED light source has the advantages of small light-emitting area, light radiation range in a hemisphere, rotational symmetry of light distribution and the like, the light-emitting area can be increased through a plurality of LED light source arrays, and a lamp with even light distribution and high light utilization rate can be formed by utilizing the lens to carry out secondary light distribution design; meanwhile, the LED light source is used as a green light source, so that the LED lamp has the advantages of long service life, low power consumption, high response speed, easiness in dimming and color mixing and the like, and the service performance of the lamp can be improved. The utility model discloses a LED floodlight has advantages such as the size is little, light in weight, is convenient for install and maintain. The utility model discloses LED floodlight adopts the modularized design, under the prerequisite that satisfies operation requirement and relevant standard, simplifies structural design, improves the commonality of part, reduces processing cost and assembly cost. In the optical design, the sensitivity of the size is reduced, and the influence of processing errors and assembly errors on the optical design is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an even, simple structure's of illumination LED floodlight.

The utility model provides a LED floodlight, which comprises a shell, a PCB, an LED light source, a bracket, an inner curved lens, a sealing gasket, a gland and a fastener; wherein:

the lamp shell has good heat dissipation performance, conducts heat generated by the light source, and finally transfers the heat to the air through thermal convection, so that the junction temperature of the LED is reduced, and the service life of the LED is prolonged;

the PCB is used for fixing the LED light sources, so that the LED light sources are arranged according to the illumination requirements to form a series-parallel structure and supply power to the LED light sources;

the LED light sources form an array and are fixed on the PCB;

the bracket is arranged in the shell and used for placing and positioning the inner curved lens;

the inner curved surface lens carries out secondary light distribution design on light rays emitted by the LED light source to form uniform floodlight illumination; the inner curved surface light distribution lens is made of glass and is rectangular, the incident surface is an array formed by a plurality of curved surface light distribution units, and the emergent surface is a plane and is positioned in a groove at the top of the bracket;

the sealing gasket is provided with two closed ribs, is pressed on the surfaces of the shell and the lens through the pressing cover, prevents water from entering the lamp from an outer edge gap and an inner edge gap of the pressing cover, and has a good waterproof effect;

the fastener is used for fixing the lamp component.

The utility model discloses in, the PCB board can carry out different series-parallel mode designs according to the illumination requirement of difference.

The utility model discloses in, the LED light source is arranged with the rectangle array mode along the casing side, at the in-service use in-process, can change the mode of arranging of LED light source according to the operation requirement of difference.

The utility model discloses in, the LED light source can comprise different grade type LED kind to realize different floodlighting effect. For example, a combination of white LED light sources and near-infrared LED light sources is needed to satisfy both illumination and near-infrared illumination. Near-infrared light emitted by the near-infrared LED is invisible to human eyes, and when the near-infrared LED is used as an auxiliary lighting source at night, glare can be prevented, so that the visual comfort of human eyes is greatly improved. The white light LED is turned off at night, and the concealment is good when only the near-infrared LED is turned on.

The utility model discloses in, the inner curved surface lens carries out the secondary grading design to the LED light source, through the change of the free curved surface shape of inboard grading unit, satisfies different grading requirements. For example, when a rectangular light spot is required, the rectangular light spot is in a rectangular pyramid structure, the bottom surface is square, and the side surface is an obtuse isosceles triangle.

The utility model discloses satisfying under the prerequisite of product operation requirement and relevant standard, simplifying structural design improves the commonality of part. In the optical design, the sensitivity of the size is reduced, and the influence of processing errors and assembly errors on the optical design is reduced. And the processing cost and the assembly cost are reduced.

Drawings

Fig. 1 is an exploded perspective view of the LED floodlight of the present invention.

Fig. 2 is a schematic diagram of the LED floodlight LED array series-parallel connection mode of the present invention.

Fig. 3 is the complete surface type of the lens of the LED floodlight of the present invention.

Fig. 4 is a sealing gasket schematic diagram of the LED floodlight of the present invention.

Reference numbers in the figures: 1 is the casing, and 2 is the PCB board, and 3 is the LED light source, and 4 are the support, and 5 are the inner curved surface lens, and 6 are sealed pad, and 7 are the gland, and 8 are the fastener, and 41 are support top recess, and 51 are inner curved surface lens incident surface curved surface, and 61 are sealed outside protrusion muscle that fills up, and 62 are sealed inboard protrusion muscle that fills up.

Detailed Description

The invention is further described below with reference to the accompanying drawings and examples.

Fig. 1 is a three-dimensional exploded view of the LED floodlight of the present invention, which uses a lamp housing 1 as a main body for fixing a PCB board 2, and has a heat dissipation effect to reduce the junction temperature of the LED. The inner curved lens 5 is fixed to the housing 1 by a press cover, and performs a secondary light distribution design of the light of the LED light source 3 by an inner curved lens incident surface curve 51 as shown in fig. 3. Set up sealed pad 6 between inner curved surface lens 5 and gland 7, prevent that steam from getting into inside the lamps and lanterns.

Fig. 4 is a schematic diagram of a sealing gasket of the LED floodlight of the present invention, which is provided with an outer protruding rib 61 and an inner protruding rib 62; the convex rib 61 outside the sealing gasket is pressed on the shell 1 through the gland 7, so that water is prevented from entering the lamp from a gap between the gland 7 and the outer edge of the shell 1; the convex rib 62 on the inner side of the sealing gasket is pressed on the inner curved lens 5 through the pressing cover 7, so that water is prevented from entering the lamp from a gap between the inner edge of the pressing cover 7 and the upper surface of the inner curved lens 5.

In this embodiment, the LED light sources 3 are fixed on the PCB 2 and arranged parallel to the side of the housing 1, and the LED light sources are LUW H9QP white LEDs and LUW H9QP near-infrared LEDs, wherein, as shown in fig. 2, the white LEDs are divided into 4 groups, each group has 12 LEDs, and the groups have 12 LEDs connected in series and 4 LEDs connected in parallel are arranged, and the near-infrared LEDs have 12 LEDs connected in series. Finally forming light spots with 360-degree azimuth angles, and enabling the normal direction of the light emitting window to be perpendicular to the light emitting plane.

Claims

1. An LED floodlight is characterized by comprising a shell, a PCB (printed circuit board), an LED light source, a bracket, an inner curved lens, a sealing gasket, a gland and a fastener; wherein the content of the first and second substances,

the shell has good heat dissipation performance, conducts heat generated by the light source, and finally transfers the heat to the air through thermal convection so as to reduce the junction temperature of the LED;

the LED light sources form an array and are fixed on the PCB;

the sealing gasket is provided with two closed ribs and is pressed on the surfaces of the shell and the lens through the pressing cover so as to prevent water from entering the lamp from an outer edge gap and an inner edge gap of the pressing cover;

the fastener is used for fixing the lamp component.

2. A LED floodlight according to claim 1, characterized in that the PCB is designed in different series-parallel modes according to different lighting requirements.

3. A LED floodlight according to claim 1, characterized in that said LED sources are designed in different arrangements according to different operating requirements.

4. A LED floodlight according to claim 3, characterized in that said LED sources are arranged in a rectangular array along the side of the housing.

5. A LED floodlight according to claim 1, characterized in that said LED light source is composed of different types of LED, so as to achieve different floodlighting effects.

6. A LED floodlight according to claim 5, wherein the LED light source is a combination of a white light LED light source and a near-infrared LED light source, so as to satisfy the requirements of illumination and near-infrared irradiation simultaneously.

7. The LED floodlight of claim 1, wherein the inner curved lens is configured to perform a secondary light distribution design on the LED light source, and different light distribution requirements are met by changing the shape of the free-form surface of the inner light distribution unit.

8. A LED floodlight according to claim 7, wherein the inner curved lens is a rectangular pyramid structure, the bottom surface is square, and the side surfaces are obtuse isosceles triangles, so as to meet the requirement of rectangular light spots.