Microlens array projection lamp

Abstract

The micro-lens array projection lamp comprises a top seat, a bottom cover, a PCBA board, a collimating lens, a micro-lens array and a radiator, the top seat and the bottom cover are detachably connected and jointly define an assembly cavity, the PCBA board, the collimating lens and the micro-lens array are sequentially and fixedly arranged in the assembly cavity, the front face of the PCBA board is electrically connected with a light-emitting body, and the back face of the PCBA board is electrically connected with the radiator. A projection hole is formed in the center of the bottom cover, the light-emitting body, the collimating lens, the micro-lens array and the projection hole are sequentially arranged along a light path, the radiator comprises a heat conducting plate, heat conducting pieces and a radiating pipeline, the heat conducting plate is attached to the back face of the PCBA board, the heat conducting pieces are arranged on the heat conducting plate in a surrounding mode, and a main body of the radiating pipeline fixedly penetrates through the heat conducting pieces. The two ends of the heat dissipation pipeline fixedly penetrate through the top base and form inlet and outlet ends. According to the projection lamp, the temperature in the assembly cavity can be effectively controlled by additionally arranging the radiator, so that the micro-lens array is kept in an optimal working state, the service life of the projection lamp is prolonged, and the stability and the reliability of the projection lamp are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of projection lamps, in particular to a microlens array projection lamp. Background Art

[0002] In the prior art, projection lamps for advertising, welcoming guests, and decoration usually use film lens projection lamps. Film lens projection lamps usually include a top seat and a bottom cover, which are buckled and connected to form an installation cavity. In the installation cavity, the PCBA board and the film lens combination are fixedly installed in sequence from one side of the top seat to the side of the bottom cover. The side of the PCBA board facing the film lens combination is electrically connected to the light-emitting body. The center of the bottom cover is provided with a projection hole. The light-emitting body, the film lens combination, and the projection hole are arranged in sequence along the light path. However, the film is made of film material, and the heat generated during projection is easily accumulated on the film and difficult to dissipate. At this time, it is necessary to match the top seat and bottom cover with better thermal conductivity. In addition, when heat accumulates on the film, it is very easy to cause the film to be in a high temperature state, thereby affecting its service life. In this regard, a Chinese utility model patent discloses a MAL projection lamp (publication number: CN 220894719U), which uses a microlens array instead of a film lens combination to improve heat dissipation, so that part of the heat accumulated in the microlens array can be quickly directed to the top seat and the bottom cover, and part of the heat can be diffused outward through the air. However, since the light-emitting body and the PCBA board are enclosed in the installation cavity, the heat generated by the long-term operation of the projection lamp is difficult to discharge, which can easily lead to high temperature in the installation cavity, thereby adversely affecting the propagation path of the microlens array and the service life of the light-emitting body. Utility Model Content

[0003] In view of this, the utility model proposes a micro-lens array projection lamp to enhance the overall heat dissipation effect of the projection lamp.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A microlens array projection lamp comprises a top seat, a bottom cover, a PCBA board, a collimating lens and a microlens array, wherein the top seat is detachably provided with a bottom cover, the inner side of the top seat and the inner side of the bottom cover together form an assembly cavity, the PCBA board, the collimating lens and the microlens array are fixedly installed in sequence from one side of the top seat to one side of the bottom cover in the assembly cavity, the front side of the PCBA board is electrically connected with a light-emitting body, the center of the bottom cover is provided with a projection hole, the light-emitting body, the collimating lens, the microlens array and the projection hole are arranged in sequence along the light path, and also comprises a heat sink, the heat sink comprises a heat conducting plate, a heat conducting sheet and a heat dissipation pipeline, the heat conducting plate is fixedly attached to the back side of the PCBA board, a plurality of heat conducting sheets are arranged on the heat conducting plate around the center of the heat conducting plate, the main body of the heat dissipation pipeline is fixedly penetrated by each heat conducting sheet, and the two ends of the heat dissipation pipeline are fixedly passed through the top seat and extend out of the top seat to form an inlet and outlet end.

[0006] To better implement the above technical solution, optionally, the heat conducting plate is an annular structural plate.

[0007] Optionally, a plurality of studs are circumferentially spaced apart on the inner top surface of the top seat, and the heat conducting plate and the PCBA board are both provided with connection holes corresponding to the studs one by one, and the heat conducting plate and the PCBA board are fixed to the top seat by screws penetrating the connection holes and screwed into the studs.

[0008] Optionally, the light emitting body is an LED lamp.

[0009] Optionally, the main body of the heat dissipation pipeline is a ring-shaped structure.

[0010] Optionally, the heat conducting plate, the heat conducting sheet and the heat dissipation pipeline are all made of aluminum alloy.

[0011] Optionally, a plurality of elastic buckles are provided at intervals in the circumferential direction on the outer circumferential surface of the upper portion of the bottom cover, and a snap-in hole corresponding to the elastic buckles and snap-fitting with the elastic buckles is provided on the outer circumferential surface of the lower portion of the top seat.

[0012] Beneficial effects of the utility model:

[0013] The utility model provides a microlens array projection lamp. By arranging a radiator, the heat generated by the operation of the PCBA board and the light-emitting body can be transferred to the heat conducting plate, and the heat conducting plate then transfers the heat to the heat dissipation pipeline through the heat conducting sheet. The inlet and outlet ends of the heat dissipation pipeline are ventilated or liquid-permeable, so that the heat in the heat dissipation pipeline can be quickly discharged. The heat discharged by the heat dissipation pipeline has a specific path and will not affect the light path of the microlens array. Adding a radiator can effectively control the temperature in the assembly cavity, so that the microlens array is kept in the best working state, the service life of the projection lamp is extended, and the stability and reliability of the projection lamp are guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of a microlens array projection lamp according to an embodiment of the utility model;

[0015] Figure 2 yes Figure 1 Exploded view from the first angle;

[0016] Figure 3 yes Figure 1 Exploded view from the second angle;

[0017] Figure 4 yes Figure 2 A three-dimensional schematic diagram of the radiator;

[0018] Top seat 10, snap-on hole 11, stud 12, bottom cover 20, projection hole 21, elastic buckle 22, PCBA board 30, light-emitting body 31, collimating lens 40, microlens array 50, radiator 60, heat-conducting plate 61, connecting hole 611, heat-conducting sheet 62, heat-dissipating pipeline 63, inlet and outlet ports 631. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments, wherein the same components are represented by the same reference numerals.

[0020] See also Figures 1 to 4 The embodiment of the utility model discloses a microlens array projection lamp, including a top seat 10, a bottom cover 20, a PCBA board 30, a collimating lens 40, a microlens array 50 and a heat sink 60.

[0021] Among them, the top seat 10 and the bottom cover 20 are both hollow cylindrical structures with a T-shaped axial cross-section. Four elastic clips 22 are arranged at intervals in the circumferential direction on the outer circumferential surface of the upper part of the bottom cover 20. The outer circumferential surface of the lower part of the top seat 10 is provided with snap-in holes 11 that correspond to the elastic clips 22 one by one and are snap-fitted with the elastic clips 22. The four elastic clips 22 cooperate with the four snap-in holes 11 to make the top seat 10 and the bottom cover 20 detachably connected. The inner side of the top seat 10 and the inner side of the bottom cover 20 together form an assembly cavity. The top seat 10 and the bottom cover 20 adopt the above-mentioned connection method, which is convenient for assembly and disassembly, and convenient for installation, maintenance and replacement of internal parts.

[0022] A PCBA board 30, a collimating lens 40 and a microlens array 50 are fixedly installed in sequence in the assembly cavity from one side of the top seat 10 to one side of the bottom cover 20. The front side of the PCBA board 30 is electrically connected to a light emitting body 31. A projection hole 21 is opened in the center of the bottom cover 20. The light emitting body 31, the collimating lens 40, the microlens array 50 and the projection hole 21 are arranged in sequence along the optical path. The radiator 60 includes a heat conducting plate 61, a heat conducting sheet 62 and a heat dissipation pipeline 63. The heat conducting plate 61 is fixedly attached to the back side of the PCBA board 30. A plurality of heat conducting sheets 62 are arranged around the center of the heat conducting plate 61 on the heat conducting plate 61. The main body of the heat dissipation pipeline 63 is fixedly penetrated by each heat conducting sheet 62. Both ends of the heat dissipation pipeline 63 are fixedly passed through the top seat 10 and extend out of the top seat 10 to form an inlet and outlet end 631.

[0023] The utility model provides a microlens array projection lamp. By providing a heat sink 60, the heat generated by the operation of the PCBA board 30 and the light-emitting body 31 can be transferred to the heat conducting plate 61. The heat conducting plate 61 then transfers the heat to the heat dissipation pipeline 63 through the heat conducting sheet 62. The inlet and outlet ends 631 of the heat dissipation pipeline 63 are ventilated or liquid-permeable, so that the heat in the heat dissipation pipeline 63 can be quickly discharged. The heat discharged from the heat dissipation pipeline 63 has a specific path and will not affect the optical path of the microlens array 50. Adding the heat sink 60 can effectively control the temperature in the assembly cavity, so that the microlens array 50 is kept in the best working state, the service life of the projection lamp is extended, and the stability and reliability of the projection lamp are guaranteed.

[0024] In the embodiment of the utility model, the heat conducting plate 61 is an annular structural plate, and a threading hole is formed in the middle of the heat conducting plate 61, which is convenient for line arrangement and can effectively transfer heat from the PCBA board 30 to the heat conducting sheet 62 and the heat dissipation pipeline 63. The light-emitting body 31 is an LED lamp, which is more energy-saving and safer.

[0025] In an embodiment of the utility model, a plurality of studs 12 are provided at intervals on the inner top surface of the top seat 10, and both the heat conducting plate 61 and the PCBA board 30 are provided with connection holes 611 corresponding one to one with the studs 12, and the heat conducting plate 61 and the PCBA board 30 are fixed to the top seat 10 by screws penetrating the connection holes 611 and screwed into the studs 12. The above fixing method has a simple and stable structure, ensures the position stability of each component during operation, and reduces problems such as displacement and poor contact caused by factors such as vibration.

[0026] In the embodiment of the utility model, the heat dissipation pipeline 63 is an annular tube body, which is convenient for assembly in a limited space and improves space utilization. The heat conducting plate 61, the heat conducting sheet 62 and the heat dissipation pipeline 63 are all made of aluminum alloy, which fully utilizes the good thermal conductivity of aluminum alloy and further improves the heat dissipation efficiency.

[0027] The technical solution of the utility model is described in detail above in combination with specific embodiments, and the described specific embodiments are used to help understand the concept of the utility model. Derivations and variations made by those skilled in the art based on the specific embodiments of the utility model also fall within the protection scope of the utility model.

Claims

1. A microlens array projection lamp, comprising a top seat (10), a bottom cover (20), a PCBA board (30), a collimating lens (40) and a microlens array (50), wherein the top seat (10) is detachably provided with a bottom cover (20), the inner side of the top seat (10) and the inner side of the bottom cover (20) together form an assembly cavity, the PCBA board (30), the collimating lens (40) and the microlens array (50) are fixedly installed in sequence from one side of the top seat (10) to one side of the bottom cover (20), the front side of the PCBA board (30) is electrically connected to a light emitting body (31), the center of the bottom cover (20) is provided with a projection hole (21), the light emitting body (31), the collimating lens (40), the microlens array (50) and the projection hole (21) are arranged in sequence along the optical path, characterized in that: The heat sink (60) is also included. The heat sink (60) includes a heat conducting plate (61), a heat conducting sheet (62) and a heat dissipation pipeline (63). The heat conducting plate (61) is fixedly attached to the back of the PCBA board (30). A plurality of heat conducting sheets (62) are arranged on the heat conducting plate (61) and around the center of the heat conducting plate (61). The main body of the heat dissipation pipeline (63) is fixedly penetrated by each heat conducting sheet (62). Both ends of the heat dissipation pipeline (63) are fixedly passed through the top seat (10) and extend out of the top seat (10) to form an inlet and outlet ends (631).

2. A microlens array projection lamp according to claim 1, characterized in that: The heat conducting plate (61) is an annular structure plate.

3. The microlens array projection lamp according to claim 1, characterized in that: A plurality of studs (12) are arranged at intervals in the circumferential direction on the inner top surface of the top seat (10); the heat conducting plate (61) and the PCBA board (30) are both provided with connection holes (611) corresponding to the studs one by one; the heat conducting plate (61) and the PCBA board (30) are fixed to the top seat (10) by screws penetrating the connection holes (611) and screwed into the studs (12).

4. The microlens array projection lamp according to claim 1, characterized in that: The light emitting body (31) is an LED lamp.

5. The microlens array projection lamp according to claim 1, characterized in that: The main body of the heat dissipation pipeline (63) is an annular structure.

6. The microlens array projection lamp according to claim 1, characterized in that: The heat conducting plate (61), the heat conducting sheet (62) and the heat dissipation pipeline (63) are all made of aluminum alloy.

7. The microlens array projection lamp according to claim 1, characterized in that: The outer circumferential surface of the upper portion of the bottom cover (20) is provided with a plurality of elastic buckles (22) at intervals in the circumferential direction, and the outer circumferential surface of the lower portion of the top seat (10) is provided with engaging holes (11) corresponding one-to-one with the elastic buckles (22) and engaging with the elastic buckles (22).

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