Projection lamp

Abstract

The utility model discloses a project lamp which comprises a shell, a circuit board and a reflecting cover, a plurality of lamp beads are arranged on the circuit board, and the project lamp is characterized in that a heat dissipation structure is arranged on the back face of the circuit board, a circle of surrounding plate surrounding the heat dissipation structure is arranged on the back face of the shell, the shell is provided with a hollowed-out part, and all the lamp beads are located in the hollowed-out part. According to the project lamp, the heat dissipation structure on the back face of the shell is surrounded by the surrounding plate, the heat dissipation structure is effectively prevented from hurting people or objects, meanwhile, the heat dissipation structure is protected, the project lamp is safer and more attractive, the heat dissipation structure can be made thinner after being protected by the surrounding plate, cost is reduced, in addition, the shell is provided with the hollowed-out part, the circuit board is located on the back face of the shell, and all the lamp beads are located in the hollowed-out part. The heat dissipation structure is directly arranged on the back face of the circuit board, the heat conduction link is omitted, heat resistance is lower, heat dissipation is facilitated, the heat dissipation effect of the projection lamp is better, and meanwhile the projection lamp is thinner.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lamp technical field, concretely relates to a projection lamp. BACKGROUND

[0002] The projection lamp is the light that the illumination on the designated illuminated surface is higher than the surrounding environment, for example, the Chinese utility model patent with the application number CN202420435376.4 discloses a kind of LED projection lamp, including main casing, the front side of the main casing is provided with mounting seat and is covered by front cover, the front cover and mounting seat form installation cavity, the installation cavity is arranged with light-emitting module, the rear side of the main casing is regularly arranged with multiple radiating fins, radiating fin is integrally formed with main casing, driving bin is set on the main casing below radiating fin, driving bin is installed with driving power supply and control circuit board, driving bin is covered by rear cover, the surface of the main casing is provided with several heat dissipation holes, heat dissipation hole is located at the periphery of mounting seat, heat dissipation hole is long and narrow structure, heat dissipation hole penetrates front cover.

[0003] The radiating fin of this projection lamp is exposed on the back of shell, when artificial assembly or accidentally touch, it is easy to cause injury to people or things, and the radiating fin can also be deformed, thereby reducing the heat dissipation effect, all exposed radiating fins are not beautiful enough, in addition, when using the projection lamp, heat is transferred from the lamp beads and the circuit board to the shell, and then to the heat dissipation structure for heat dissipation, there are more heat conduction links, the heat dissipation effect is poor, the thermal resistance is high, and at the same time, the projection lamp is thicker. SUMMARY

[0004] In view of the deficiencies in the background art, the technical problem to be solved by the utility model is to provide a safer and more beautiful projection lamp.

[0005] To this end, the utility model is implemented by adopting the following technical solutions:

[0006] A projection lamp, comprising a shell, a circuit board and a reflector, the circuit board is provided with a plurality of lamp beads, characterized by: the back of the circuit board is provided with a heat dissipation structure, the back of the shell is provided with a surrounding plate surrounding the heat dissipation structure, the shell has a hollow part, and all the lamp beads are located in the hollow part.

[0007] Further, the upper and lower sides of the surrounding plate are provided with a plurality of air holes, and the height of the surrounding plate is higher than or equal to the height of the heat dissipation structure.

[0008] Further, the outer circle of the front surface of the circuit board is bonded to the back of the shell by glue, the heat dissipation structure comprises radiating fins bonded to the circuit board, the radiating fins are provided with a plurality of upward protruding ribs, first air ducts are formed between adjacent ribs, the ribs are provided with heat dissipation holes along the length direction, and the heat dissipation holes form second air ducts.

[0009] Further, the circuit board is an aluminum substrate, the aluminum substrate is composed of a conductive layer, an insulating layer and an aluminum plate from top to bottom, the heat dissipation fins and the aluminum plate are welded by laser, and the light shield is arranged in the shell to cover the periphery of the circuit board and expose the lamp beads.

[0010] Further, the air holes are aligned with the first air ducts.

[0011] Further, the gap is between the surrounding plate and the heat dissipation fins.

[0012] Further, the heat dissipation fins are integrally formed metal sheets, and the convex strips are straight strips or wavy strips.

[0013] Further, the air holes are long strips.

[0014] After the above technical scheme, the heat dissipation structure on the back of the shell is surrounded by a surrounding plate, which effectively prevents the heat dissipation structure from hurting people or objects, and protects the heat dissipation structure, which is safer and more beautiful. The heat dissipation structure can be made thinner after being protected by the surrounding plate, which reduces the cost. In addition, the shell has a hollow part, the circuit board is located on the back of the shell, all the lamp beads are located in the hollow part, and the heat dissipation structure is directly arranged on the back of the circuit board, which reduces the heat conduction link and reduces the thermal resistance, facilitates heat dissipation, and makes the heat dissipation effect of the projection lamp better, and the thickness of the projection lamp thinner. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model has the following drawings:

[0016] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 It is Figure 1 It is an enlarged view of A in the middle;

[0018] Figure 3 It is a three-dimensional structure schematic diagram of the utility model without the circuit board and the heat dissipation mechanism.

[0019] The reference signs are as follows: 1, shell; 2, surrounding plate; 3, air hole; 4, heat dissipation fin; 5, convex strip; 6, first air duct; 7, heat dissipation hole; 8, gap; 9, light shield; 10, hollow part. DETAILED DESCRIPTION

[0020] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model will be described in detail as follows in combination with the drawings and preferred embodiments.

[0021] With reference to the drawings, the utility model provides a kind of light projector, including shell 1, circuit board and reflector 9, and circuit board is equipped with several lamp beads, it is characterized in that: the back of the circuit board is equipped with heat dissipation structure, the back of the shell 1 is equipped with a surrounding heat dissipation structure surrounding fence 2, the shell 1 has hollow part 10, all the lamp beads are located in hollow part 10, the upper and lower sides of the fence 2 are equipped with several air holes 3, and the height of fence 2 is higher than or equal to the height of heat dissipation structure, the front outer circle of the circuit board is bonded with the back of shell 1 by glue, and the heat dissipation structure includes the fin 4 bonded with circuit board, the fin 4 is equipped with several upward protruding ribs 5, first air duct 6 is formed between adjacent ribs 5, the rib 5 is provided with heat dissipation hole 7 along its length direction, and heat dissipation hole 7 forms second air duct, the circuit board is aluminum substrate, and aluminum substrate is composed of conductive layer, insulating layer and aluminum plate from top to bottom, the fin 4 and aluminum plate are welded by laser, the reflector 9 is arranged in shell 1 and covers the periphery of circuit board and exposes lamp bead, and power supply, triode, piezoresistor, fuse, capacitor and other components are arranged in the periphery of circuit board and covered by reflector 9 (power supply, triode, piezoresistor, fuse, capacitor and other components arranged on circuit board belong to existing conventional technology, and specific structure is not described here), more beautiful, the air hole 3 is aligned with first air duct 6, the gap 8 between the fence 2 and the fin 4, the fin 4 is integrally formed metal sheet, the rib 5 is straight strip or wave shape, the air hole 3 is strip-shaped, and the circuit board is bonded with shell by glue.

[0022] In the embodiment, the heat dissipation structure at the back of the shell 1 is surrounded by the surrounding plate 2, which effectively prevents the heat dissipation structure from hurting people or objects, protects the heat dissipation structure, and makes the heat dissipation structure more beautiful. The heat dissipation structure can be made thinner after being protected by the surrounding plate 2, which reduces the cost. In addition, the shell 1 has a hollow part 10, the circuit board is located at the back of the shell 1, all the lamp beads are located in the hollow part 10, and the heat dissipation structure is directly arranged at the back of the circuit board, which reduces the heat conduction link, has lower thermal resistance, facilitates heat dissipation, makes the heat dissipation effect of the light projector better, and makes the thickness of the light projector thinner. The arrangement of the air holes 3 is beneficial to the convection between the heat dissipation structure and the outside, so as to ensure the heat dissipation effect, and the air holes 3 can also be used for drainage to avoid water accumulation in the surrounding plate and affect heat dissipation. The arrangement of the first air duct 6 and the second air duct greatly increases the contact area of the heat dissipation structure with air and wind flow, so that the heat dissipation structure quickly dissipates the heat generated by the lamp beads, so as to realize rapid cooling of the lamp beads, better heat dissipation effect, and also reduces light decay and prolongs the service life of the light projector. The arrangement of the gap 8 avoids the blockage of the first air duct 6 and the second air duct, so as to ensure the normal heat dissipation of the first air duct 6 and the second air duct. The heat dissipation fins 4 are integrally formed metal sheets, which have more uniform heat conduction and heat dissipation. The wavy ribs 5 can increase the contact area with air and wind flow, and further increase the heat dissipation effect. The air holes 3 are in the form of long strips, which are beneficial to convection. The heat dissipation fins 4 and the aluminum plate are laser welded, and the two directly contact each other, which further reduces the heat conduction link, so that the light projector has better heat dissipation effect.

[0023] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the technical solution of the present application, and any equivalent embodiments with equivalent changes are equivalent to the above embodiments. Any modification, change, modification and modification of the above embodiments according to the technical essence of the present application are still within the scope of the technical solution of the present application.

Claims

1. A kind of light projector, including shell, circuit board and reflector, circuit board is equipped with several beads, it is characterized by: The back surface of the circuit board is provided with a heat dissipation structure, the back surface of the shell is provided with a surrounding plate surrounding the heat dissipation structure, the shell has a hollow part, and all the lamp beads are located in the hollow part.

2. The light projector according to claim 1, characterized in that: The upper and lower sides of the surrounding plate are provided with a plurality of air holes, and the height of the surrounding plate is higher than or equal to the height of the heat dissipation structure.

3. The light projector of claim 2, wherein: The outer circle of the front surface of the circuit board is bonded to the back surface of the shell by glue, the heat dissipation structure comprises heat dissipation fins bonded to the circuit board, the heat dissipation fins are provided with a plurality of upward protruding protrusions, first ventilation channels are formed between adjacent protrusions, and the protrusions are provided with heat dissipation through holes along the length direction, and the heat dissipation through holes form second ventilation channels.

4. The light projector of claim 2 wherein: The circuit board is an aluminum substrate composed of a conductive layer, an insulating layer and an aluminum plate from top to bottom, the heat dissipation structure and the aluminum plate are welded by laser, and the reflecting cover is arranged in the shell to cover the periphery of the circuit board and expose the lamp beads.

5. The light projecting lamp according to claim 3 or 4, wherein: The air holes are aligned with the first ventilation channels.

6. The light projecting lamp according to claim 3 or 4, wherein: The surrounding plate and the heat dissipation fins have a gap therebetween.

7. The light projector of claim 3 wherein: The heat dissipation fins are integrally formed metal sheets, and the protrusions are straight strips or wavy shapes.

8. The light projecting lamp according to claim 3 or 4, wherein: The air holes are in the shape of long strips.

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