Planar coaxial light source with good heat dissipation, high brightness and large power

Abstract

The utility model discloses a plane coaxial light source which is good in heat dissipation, high in brightness and large in power, and comprises a cover plate, heat dissipation fins are respectively arranged on the periphery of the cover plate, a PCB (printed circuit board) is arranged on the inner side wall of each heat dissipation fin, at least one heat dissipation module is arranged on the outer side wall of each heat dissipation fin, an LED (light-emitting diode) light-emitting module is arranged on each PCB, and the LED light-emitting modules are arranged on the cover plate. An installation cavity is arranged between the cover plate and the cooling fins on the periphery of the cover plate in a surrounding mode, an optical lens assembly is arranged on the installation cavity, and a pressing plate is arranged on the top of the optical lens assembly. According to the plane coaxial light source good in heat dissipation, high in brightness and large in power, the PCB is arranged on the inner side wall of each heat dissipation fin, the heat dissipation modules are arranged on the outer side wall of each heat dissipation fin, the heat dissipation effect of the plane coaxial light source can be effectively improved, the LED light-emitting modules on the PCB can emit higher brightness, and the heat dissipation efficiency of the plane coaxial light source is improved. Higher power can be conveniently achieved; and heat cannot be accumulated in the mounting cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of planar coaxial light sources, in particular to a planar coaxial light source with good heat dissipation, high brightness and high power. Background Art

[0002] A planar coaxial light source is a lighting device that places multiple light sources at the same center and emits light onto a flat surface. Because the light rays all point in the same direction, it is called a coaxial light source.

[0003] In the field of machine vision, planar coaxial light sources provide a lighting method designed specifically for flat or nearly flat objects. Because the light source is aligned with the camera's optical axis, the light is almost perpendicular to the object's surface, which greatly reduces shadows and surface reflections caused by the lighting angle and provides a more uniform and consistent lighting effect. Furthermore, they offer advantages such as high lighting contrast, high detection accuracy, and the adaptability and flexibility of the light source.

[0004] However, the disadvantage of the above-mentioned conventional planar coaxial light source is that because a row of LED lights are arranged on the inner wall of the planar coaxial light source, due to the excessive number of LED lights, when the light power of the planar coaxial light source is large, this can easily cause the LED lights to generate heat and accumulate inside the inner wall of the planar coaxial light source, which can easily damage the LED lights, or the user cannot use it at a higher power, which ultimately results in the brightness of the planar coaxial light source not being too high. Utility Model Content

[0005] The purpose of the present invention is to overcome the above-mentioned defects in the prior art and provide a planar coaxial light source with good heat dissipation, high brightness and high power, so as to solve the problem of low brightness and low power of conventional planar coaxial light sources in the prior art.

[0006] To achieve the above-mentioned objectives, the present invention provides a planar coaxial light source with good heat dissipation, high brightness and high power, including a cover plate, wherein heat sinks are respectively provided on all four sides of the cover plate, an inner side wall of each heat sink is provided with a PCB board, an outer side wall of each heat sink is provided with at least one heat dissipation module, an LED light-emitting module is provided on the PCB board, an installation cavity is surrounded by the cover plate and the heat sinks around it, an optical lens assembly is provided on the installation cavity, and a pressure plate is installed on the top of the optical lens assembly.

[0007] Preferably, the heat dissipation module is a heat dissipation fan.

[0008] Preferably, the LED light-emitting module includes a plurality of LED lamp beads linearly arranged on a PCB board.

[0009] Preferably, the cover plate and each heat sink are connected together by bolts.

[0010] Preferably, a first light-transmitting window is provided on the inner side of the cover plate, and a second light-transmitting window is provided on the inner side of the pressure plate. The first light-transmitting window and the second light-transmitting window are respectively communicated with the installation cavity.

[0011] Preferably, a first annular wall is convexly provided on the inner side of the cover plate, and a second annular wall is convexly provided on the inner side of the pressure plate, and both the first annular wall and the second annular wall are located in the installation cavity.

[0012] Preferably, the optical lens assembly is arranged between the first annular wall and the second annular wall.

[0013] Preferably, the optical lens assembly includes a light guide plate, a Mylar sheet disposed on top of the light guide plate, and an enhancement lens disposed on top of the Mylar sheet.

[0014] Preferably, two adjacent heat sinks are connected together by bolts, and the outer side walls of the heat sinks have a plurality of linearly arranged heat sink fins.

[0015] Preferably, it also includes a power connector installed on the outer side wall of one of the heat sinks and electrically connected to each PCB board.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The utility model is provided with a PCB board and an optical lens assembly. The PCB board is provided with an LED light-emitting module. All LED light-emitting modules emit light to the center position of the installation cavity, and then emit plane light through the optical lens assembly.

[0018] 2. The PCB board set in the utility model is directly arranged on the inner wall of the heat sink. When the LED light-emitting module on the PCB board generates heat, the heat can be promptly transferred to the heat sink, and then dissipated to the external environment through the heat dissipation module on the outer wall of the heat sink. The advantage of this structural setting is that the LED light-emitting module on the PCB board can be adjusted to a very high power when in use, so that it emits very high brightness, and at the same time, heat will not accumulate in the installation cavity.

[0019] 3. In summary, the present invention provides a planar coaxial light source with good heat dissipation, high brightness and high power. The PCB board is arranged on the inner wall of each heat sink, and the heat dissipation module is arranged on the outer wall of each heat sink. This can effectively improve the heat dissipation problem of the planar coaxial light source of the present invention, which is conducive to the LED light-emitting module on the PCB board to emit higher brightness, facilitate achieving higher power and prevent heat accumulation in the installation cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a structural diagram of a planar coaxial light source with good heat dissipation, high brightness and high power provided by an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the exploded structure of a planar coaxial light source with good heat dissipation, high brightness and high power provided by an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the exploded structure of a planar coaxial light source (with the power connector and heat dissipation module omitted) with good heat dissipation, high brightness and high power provided by an embodiment of the present utility model;

[0024] Figure 4 This is a schematic oblique side cross-sectional view of a planar coaxial light source (power connector and heat dissipation module omitted) with good heat dissipation, high brightness and high power provided by an embodiment of the present utility model;

[0025] Figure 5 This is a schematic oblique side cross-sectional view of a heat sink and a PCB board provided in an embodiment of the present utility model.

[0026] Included in the diagram are:

[0027] 1. Cover plate; 2. Heat sink; 3. PCB board; 4. LED light-emitting module; 5. Mounting cavity; 6. Optical lens assembly; 7. Press plate; 10. First light-transmitting window; 70. Second light-transmitting window; 11. First annular wall; 71. Second annular wall; 61. Light guide plate; 62. Mylar sheet; 63. Enhanced lens; 20. Heat dissipation fins; 8. Power connector; 9. Heat dissipation module. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in this embodiment of the present invention to clearly and completely describe the technical solution in this embodiment of the present invention. Obviously, the embodiment described is only one embodiment of the present invention, not all embodiments of the present invention. Based on this embodiment of the present invention, all other embodiments of the present invention obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this utility model.

[0029] See also Figures 1 to 5The embodiment of the utility model provides a planar coaxial light source with good heat dissipation, high brightness and high power, including a cover plate 1, heat sinks 2 are respectively provided on the four sides of the cover plate 1, a PCB board 3 is provided on the inner side wall of each heat sink 2, at least one heat dissipation module 9 is provided on the outer side wall of each heat sink 2, an LED light-emitting module 4 is provided on the PCB board 3, a mounting cavity 5 is surrounded by the cover plate 1 and the heat sinks 2 around it, an optical lens assembly 6 is provided on the mounting cavity 5, and a pressure plate 7 is installed on the top of the optical lens assembly 6.

[0030] The heat dissipation module 9 is a heat dissipation fan.

[0031] The LED light-emitting module 4 includes a plurality of LED lamp beads linearly arranged on the PCB board 3 .

[0032] The cover plate 1 and the heat sinks 2 are connected together by bolts. A first light-transmitting window 10 is provided on the inner side of the cover plate 1, and a second light-transmitting window 70 is provided on the inner side of the pressure plate 7. The first light-transmitting window 10 and the second light-transmitting window 70 are respectively connected to the mounting cavity 5.

[0033] A first annular wall 11 is convexly provided on the inner side of the cover plate 1 , and a second annular wall 71 is convexly provided on the inner side of the pressure plate 7 . Both the first annular wall 11 and the second annular wall 71 are located in the installation cavity 5 .

[0034] The optical lens assembly 6 is disposed between the first annular wall 11 and the second annular wall 71 .

[0035] The optical lens assembly 6 includes a light guide plate 61, a Mylar sheet 62 mounted on top of the light guide plate 61, and an amplifying lens 63 mounted on top of the Mylar sheet 62. The light guide plate 61 evenly distributes the light concentrated on the center line by each LED light-emitting module 4 onto a flat surface. The Mylar sheet 62 is a polyester film that connects the light guide plate 61 and the amplifying lens 63. The amplifying lens 63 enhances the uniform brightness of the light guide plate 61.

[0036] The bottom of the light guide plate 61 abuts against the first annular wall 11 , and the top of the amplifying lens 63 abuts against the second annular wall 71 .

[0037] Two adjacent heat sinks 2 are connected together by bolts. The outer side wall of the heat sink 2 has a plurality of linearly arranged heat sink fins 20. The heat sink fins 20 effectively increase the heat dissipation area, which can facilitate the heat dissipation of the heat dissipation module 9.

[0038] The planar coaxial light source with good heat dissipation, high brightness and high power of the present invention further comprises a power connector 8 which is installed on the outer side wall of one of the heat sinks 2 and is electrically connected to each PCB board 3 respectively.

[0039] The light-emitting principle of a planar coaxial light source with good heat dissipation, high brightness and high power of the present invention is as follows: each PCB board 3 has an LED light-emitting module 4, and each LED light-emitting module 4 emits light to the center position of the installation cavity 5. Then, the light converged on the center line of each LED light-emitting module 4 is uniformly guided to the plane through the light guide plate 61 to form plane light. The plane light passes through the amplifying lens 63 to further increase the brightness of the plane light. Finally, the plane light passes through the second light-transmitting window 70 and hits the surface of the object to be measured.

[0040] The advantages of the planar coaxial light source of the utility model with good heat dissipation, high brightness and high power are: high heat dissipation, less heat accumulation, high luminous brightness and high power.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A planar coaxial light source with good heat dissipation, high brightness and high power, characterized in that: The invention comprises a cover plate (1), wherein heat sinks (2) are respectively provided on the four sides of the cover plate (1), a PCB board (3) is provided on the inner side wall of each heat sink (2), at least one heat dissipation module (9) is provided on the outer side wall of each heat sink (2), an LED light-emitting module (4) is provided on the PCB board (3), an installation cavity (5) is provided between the cover plate (1) and the heat sinks (2) on the four sides, an optical lens assembly (6) is provided on the installation cavity (5), and a pressure plate (7) is provided on the top of the optical lens assembly (6).

2. A planar coaxial light source with good heat dissipation, high brightness and high power according to claim 1, characterized in that: The heat dissipation module (9) is a heat dissipation fan.

3. A planar coaxial light source with good heat dissipation, high brightness and high power according to claim 1, characterized in that: The LED light-emitting module (4) comprises a plurality of LED lamp beads linearly arranged on a PCB board (3).

4. The planar coaxial light source with good heat dissipation, high brightness and high power according to claim 1, characterized in that: The cover plate (1) and each heat sink (2) are connected together by bolts.

5. The planar coaxial light source with good heat dissipation, high brightness and high power according to claim 1, characterized in that: A first light-transmitting window (10) is provided on the inner side of the cover plate (1), and a second light-transmitting window (70) is provided on the inner side of the pressure plate (7). The first light-transmitting window (10) and the second light-transmitting window (70) are respectively connected to the installation cavity (5).

6. A planar coaxial light source with good heat dissipation, high brightness and high power according to claim 1, characterized in that: A first annular wall (11) is convexly provided on the inner side of the cover plate (1), and a second annular wall (71) is convexly provided on the inner side of the pressure plate (7). Both the first annular wall (11) and the second annular wall (71) are located in the installation cavity (5).

7. A planar coaxial light source with good heat dissipation, high brightness and high power according to claim 6, characterized in that: The optical lens assembly (6) is arranged between the first annular wall (11) and the second annular wall (71).

8. A planar coaxial light source with good heat dissipation, high brightness and high power according to claim 1 or 7, characterized in that: The optical lens assembly (6) comprises a light guide plate (61), a Mylar sheet (62) arranged on the top of the light guide plate (61), and an enhancement lens (63) arranged on the top of the Mylar sheet (62).

9. The planar coaxial light source with good heat dissipation, high brightness and high power according to claim 1, characterized in that: Two adjacent heat sinks (2) are connected together by bolts, and the outer side walls of the heat sinks (2) are provided with a plurality of linearly arranged heat sink fins (20).

10. The planar coaxial light source with good heat dissipation, high brightness and high power according to claim 1, characterized in that: It also includes a power connector (8) installed on the outer side wall of one of the heat sinks (2) and electrically connected to each PCB board (3).

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