Narrow-edge straight-emitting backlight source and film stain detection device

Abstract

The utility model relates to the technical field of film detection, and provides a narrow-edge straight-emitting backlight source and a film stain detection device. A shell comprises a bottom plate which is horizontally arranged and side plates which are fixedly connected to the periphery of the top of the bottom plate; a first light passing hole is formed in the bottom plate; the inner walls of the side plates are inclined surfaces; in the thickness direction of the bottom plate, the inclined surface inclines outwards from the bottom plate to the diffusion plate; the LED lamp panel is positioned in the mounting cavity and is clamped in the first clamping groove; a second light passing hole is formed in the LED lamp panel; the diffusion plate is located in the mounting cavity and clamped in the second clamping groove, and the diffusion plate is arranged above the LED lamp panel in parallel; a third light passing hole is formed in the diffusion plate; the annular connecting piece is connected with the LED lamp panel and the diffusion panel, and an inner hole of the annular connecting piece, the first light passing hole, the second light passing hole and the third light passing hole are coaxial and identical in diameter. According to the utility model, the light-emitting area can be ensured, and the structure size is moderate.

Description

Technical Field

[0001] The utility model relates to the technical field of film detection, in particular to a narrow-edge direct-emitting backlight source and a film stain detection device. Background Art

[0002] The film stain detection device needs to use a camera to take pictures of the object under the auxiliary light source of the backlight. However, the shell of the existing direct-emitting backlight is thick. If the structural size is moderate, the luminous area is small, and if the luminous area meets the requirements, the structural size is large. Therefore, it is necessary to design a direct-emitting backlight with a narrow edge design, so that the luminous area can be guaranteed while the structural size is moderate. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the above-mentioned problems existing in the prior art.

[0004] In order to solve the above technical problems, the utility model provides a narrow-edge straight-light backlight source, comprising: a housing, comprising a horizontally arranged bottom plate and side plates fixedly connected to the top of the bottom plate; the side plates are arranged to form a mounting cavity; a first light passing hole is arranged on the bottom plate; a first card slot and a second card slot are respectively arranged at the bottom and the top of the inner wall of the side plate; the inner wall of the side plate is an inclined surface; along the thickness direction of the bottom plate, the inclined surface is inclined outward from the bottom plate to the diffuser plate;

[0005] The LED light board is located in the installation cavity and is clamped in the first clamping slot, and the LED light board is stacked on the top of the bottom plate; the LED light board includes a PCB board and lamp beads arranged on the PCB board; and a second light passing hole is arranged on the LED light board;

[0006] The diffuser is located in the installation cavity and is clamped in the second clamping slot. The diffuser is arranged parallel to the top of the LED light board. The diffuser is provided with a third light passing hole.

[0007] The annular connecting piece is connected to the LED light board and the diffusion board. The inner hole of the annular connecting piece, the first light passing hole, the second light passing hole and the third light passing hole are coaxial and have the same diameter.

[0008] In one embodiment of the present invention, a reflective film is attached to the inner wall of the side plate.

[0009] In one embodiment of the present invention, the side panel includes four sub-side panels, and the four sub-side panels are respectively connected to the four side surfaces of the bottom panel; two adjacent sub-side panels are connected by screws.

[0010] In one embodiment of the present invention, the annular connecting member is connected between the LED light board and the diffusion plate, and the annular connecting member is connected to the LED light board and the diffusion plate by screws.

[0011] In one embodiment of the utility model, the present application also includes a power cord; a buckle is provided on the power cord, an opening is provided on the side panel, and the power cord is connected to the opening via the buckle; the power cord passes through the opening and is electrically connected to the LED light board.

[0012] On the other hand, the utility model provides a film stain detection device, comprising:

[0013] Test platform, horizontal setting;

[0014] The narrow-edge direct-emitting backlight source in any of the above items, wherein the narrow-edge direct-emitting backlight source is inverted and connected in parallel above the test platform;

[0015] The camera bracket comprises a bracket body and a camera connector, wherein the bracket body is vertically arranged and connected to the bottom plate of the narrow-edge straight-emitting backlight source; the camera connector is connected to one side of the bracket body and is located above the bottom plate, and the height of the camera connector is adjustable;

[0016] The camera is connected to the camera connecting member, and the camera passes through the first light passing hole, the inner hole, the second light passing hole and the third light passing hole to photograph the object to be tested placed on the test platform.

[0017] In one embodiment of the present invention, a circular mark is provided on the upper surface of the test platform, and the interior of the circular mark is the area where the object to be tested is placed; the projection of the first light through the hole on the test platform surrounds the area where the object to be tested is placed.

[0018] In one embodiment of the utility model, the bracket body includes a horizontal fixing plate and a vertical fixing plate vertically connected to one side of the horizontal fixing plate; the horizontal fixing plate is fixedly connected to the bottom plate; and the camera connector is slidably connected to the vertical fixing plate.

[0019] In one embodiment of the utility model, a first waist-shaped hole extending vertically is provided on the vertical fixing plate, and a connecting protrusion is provided on one side of the camera connecting piece. The connecting protrusion is located in the first waist-shaped hole and is fixedly connected to the vertical fixing plate by a first locking screw.

[0020] In one embodiment of the utility model, the present application also includes a second locking screw; a second waist-shaped hole is horizontally arranged on the horizontal fixing plate, and a threaded hole is arranged on the bottom plate, and the second locking screw passes through the second waist-shaped hole and is connected to the threaded hole.

[0021] The above technical solution of the utility model has the following advantages compared with the prior art:

[0022] The narrow-edge direct-emitting backlight source and film stain detection device described in the utility model have an inner wall of the side edge as an inclined surface, and the inclined surface is inclined outward from the bottom plate to the diffuser plate along the thickness direction of the bottom plate, so that when the LED light board is powered on and emits light, its light-emitting area can be increased. At the same time, the side edge can be made narrower while ensuring the support strength, thereby reducing its structural size. In addition, the diffuser plate and the LED light board in this embodiment are respectively clamped in the second card slot and the first card slot, which can not only ensure the reliability of installation, but also further reduce its structural size. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein:

[0024] Figure 1 It is a structural schematic diagram of a film stain detection device in a preferred embodiment of the utility model;

[0025] Figure 2 yes Figure 1 A structural schematic diagram of a film stain detection device (excluding the test platform and the door frame);

[0026] Figure 3 yes Figure 1 A schematic structural diagram of a narrow-edge straight-hair backlight source in a film stain detection device;

[0027] Figure 4 yes Figure 3 Exploded diagram of

[0028] Figure 5 yes Figure 1 A schematic structural diagram of a sub-side plate in a film stain detection device;

[0029] Description of the reference numerals in the specification: 100, test platform; 110, circular mark; 120, area for placing the object to be tested;

[0030] 200, narrow-edge straight-hair backlight source; 210, housing; 211, bottom plate; 212, side plate; 212a, sub-side plate; 213, mounting cavity; 214, first light passage hole; 215, first card slot; 216, second card slot; 217, inclined surface; 220, LED light board; 221, second light passage hole; 230, diffuser; 231, third light passage hole; 240, annular connector; 241, inner hole; 250, power cord; 251, buckle;

[0031] 300, camera bracket; 310, bracket body; 311, horizontal fixing plate; 3111, second waist-shaped hole; 312, vertical fixing plate; 3121, first waist-shaped hole; 313, reinforcing rib; 320, camera connecting piece; 321, connecting protrusion;

[0032] 400, Camera;

[0033] 500, object to be tested;

[0034] 600, portal frame. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0036] Reference Figure 1 to Figure 5 As shown, an embodiment of the utility model provides a film stain detection device, including: a horizontally arranged test platform 100, a narrow-edge straight-hair backlight source 200, a camera bracket 300 and a camera 400.

[0037] The narrow-edge direct-hair backlight source 200 is inverted and connected in parallel above the test platform 100 through two door-shaped frames 600. The narrow-edge direct-hair backlight source 200 includes a housing 210, an LED light board 220, a diffuser plate 230, and a circular connector 240. The housing 210 includes a horizontally arranged bottom plate 211 and a side plate 212 fixedly connected to the top of the bottom plate 211. The side plates 212 and the side plates 212 are arranged to form a mounting cavity 213; the bottom plate 211 is provided with a first light passing hole 214. The bottom and top of the inner wall of the side plate 212 are respectively provided with a first card slot 215 and a second card slot 216. The inner wall of the side plate 212 is an inclined surface 217; along the thickness direction of the bottom plate 211, the inclined surface 217 is inclined outward from the bottom plate 211 to the diffuser plate 230. The LED light board 220 is located in the installation cavity 213 and is clamped in the first card slot 215. The LED light board 220 is stacked on the top of the bottom plate 211. The LED light board 220 includes a PCB board and lamp beads arranged on the PCB board; the LED light board 220 is provided with a second light passage hole 221. The diffusion plate 230 is located in the installation cavity 213 and is clamped in the second card slot 216. The diffusion plate 230 is arranged in parallel above the LED light board 220; the diffusion plate 230 is provided with a third light passage hole 231. The annular connector 240 is connected to the LED light board 220 and the diffusion plate 230. The inner hole 241 of the annular connector 240, the first light passage hole 214, the second light passage hole 221 and the third light passage hole 231 are coaxial and have the same diameter.

[0038] The camera support 300 includes a support body 310 and a camera connector 320. The support body 310 is vertically arranged and connected to the bottom plate 211 of the narrow-edge straight-emitting backlight source 200. The camera connector 320 is connected to one side of the support body 310 and is located above the bottom plate 211. The height of the camera connector 320 is adjustable. The camera 400 is connected to the camera connector 320, and the camera 400 passes through the first light passing hole 214, the inner hole 241, the second light passing hole 221, and the third light passing hole 231 to shoot the object to be tested 500 placed on the test platform 100.

[0039] Specifically, the inner wall of the side in this embodiment is an inclined surface 217, and the inclined surface 217 is inclined outward from the bottom plate 211 to the diffuser plate 230 along the thickness direction of the bottom plate 211, so that when the LED light board 220 is powered on and emits light, its light-emitting area can be increased. At the same time, the side can be made narrower while ensuring the support strength, thereby reducing its structural size. In addition, the diffuser plate 230 and the LED light board 220 in this embodiment are respectively clamped in the second clamping groove 216 and the first clamping groove 215, which can not only ensure the reliability of installation, but also further reduce its structural size.

[0040] Furthermore, a reflective film is attached to the inner wall of the side plate 212. Specifically, the provision of the reflective film can improve the uniformity of light emission.

[0041] Further, the side panel 212 includes four sub-side panels 212a, which are respectively connected to the four sides of the bottom panel 211; two adjacent sub-side panels 212a are connected by screws. Specifically, after the four sub-side panels 212a in this embodiment are manufactured, they are connected as one by screws on site.

[0042] Further, the annular connecting member 240 is connected between the LED light board 220 and the diffusion plate 230 , and the annular connecting member 240 is connected to the LED light board 220 and the diffusion plate 230 by screws.

[0043] Furthermore, the present application also includes a power cord 250; a buckle 251 is provided on the power cord 250, an opening is provided on the side panel 212, and the power cord 250 is connected to the opening via the buckle 251; the power cord 250 passes through the opening and is electrically connected to the LED light board 220.

[0044] Furthermore, a circular mark 110 is provided on the upper surface of the test platform 100, and the interior of the circular mark 110 is a test object placement area 120; the projection of the first light passing hole 214 on the test platform 100 surrounds the test object placement area 120. Specifically, in this embodiment, through the design of the circular mark 110, when the test object 500 is placed, it is possible to quickly identify whether the placement position of the test object 500 is correct, thereby improving the test efficiency.

[0045] Furthermore, the bracket body 310 includes a horizontal fixing plate 311 and a vertical fixing plate 312 vertically connected to one side of the horizontal fixing plate 311; the horizontal fixing plate 311 is fixedly connected to the bottom plate 211; the camera connector 320 is slidably connected to the vertical fixing plate 312, so as to adjust the height of the camera connector 320 and the camera 400. In some embodiments, the bracket body 310 also includes a triangular reinforcing rib 313, which is connected between the horizontal fixing plate 311 and the vertical fixing plate 312.

[0046] Furthermore, a vertically extending first waist-shaped hole 3121 is provided on the vertical fixing plate 312, and a connecting protrusion 321 is provided on one side of the camera connecting member 320. The connecting protrusion 321 is located in the first waist-shaped hole 3121 and is fixedly connected to the vertical fixing plate 312 by a first locking screw. The camera connecting member 320 slides up and down in the first waist-shaped hole 3121 to adjust the height of the camera 400 and the camera connecting member 320. When the target height is reached, the camera connecting member 320 and the vertical fixing plate 312 are relatively fixed by the first locking screw.

[0047] Furthermore, the present application also includes a second locking screw; a second waist-shaped hole 3111 is horizontally arranged on the horizontal fixing plate 311, a threaded hole is arranged on the bottom plate 211, and the second locking screw passes through the second waist-shaped hole 3111 and is connected to the threaded hole. Through the design of the second waist-shaped hole 3111 and the second locking screw, the horizontal position of the bracket body 310 can be adjusted to adapt to different cameras 400 and objects to be measured 500.

[0048] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A narrow edge straight backlight source, characterized in that: include: The housing comprises a horizontally arranged bottom plate and side plates fixedly connected to the top of the bottom plate; the side plates are arranged to form a mounting cavity; the bottom plate is provided with a first light passing hole; the bottom and the top of the inner wall of the side plate are respectively provided with a first card slot and a second card slot; the inner wall of the side plate is an inclined surface; An LED light board is located in the installation cavity and is clamped in the first clamping slot, and the LED light board is stacked on the top of the bottom plate; the LED light board includes a PCB board and lamp beads arranged on the PCB board; and a second light passing hole is arranged on the LED light board; A diffusion plate is located in the installation cavity and is clamped in the second clamping slot, and the diffusion plate is arranged parallel to the top of the LED light board; a third light passing hole is provided on the diffusion plate; A circular ring-shaped connector is connected to the LED light board and the diffuser plate. The inner hole of the circular ring-shaped connector, the first light passing hole, the second light passing hole and the third light passing hole are coaxial and have the same diameter. Along the thickness direction of the base plate, the inclined surface is inclined outward from the base plate to the diffuser plate.

2. The narrow-edge straight-hair backlight according to claim 1, characterized in that: A reflective film is attached to the inner wall of the side plate.

3. The narrow-edge straight-hair backlight according to claim 1, characterized in that: The annular connecting piece is connected between the LED light board and the diffusion plate, and the annular connecting piece is connected to the LED light board and the diffusion plate respectively by screws.

4. The narrow-edge straight-hair backlight according to claim 1, characterized in that: The side plate includes four sub-side plates, and the four sub-side plates are respectively connected to the four side surfaces of the bottom plate; two adjacent sub-side plates are connected by screws.

5. The narrow-edge straight-hair backlight according to claim 1, characterized in that: It also includes a power cord; a buckle is provided on the power cord, an opening is provided on the side panel, and the power cord is connected to the opening via the buckle; the power cord passes through the opening and is connected to the LED light board.

6. A film stain detection device, characterized in that: include: Test platform, horizontal setting; The narrow-edge direct-emitting backlight source according to any one of claims 1 to 5, wherein the narrow-edge direct-emitting backlight source is inverted and connected in parallel above the test platform; A camera bracket, comprising a bracket body and a camera connector, wherein the bracket body is vertically arranged and connected to the bottom plate of the narrow-edge straight-emitting backlight source; the camera connector is connected to one side of the bracket body and is located above the bottom plate, and the height of the camera connector is adjustable; A camera is connected to the camera connecting member, and the camera passes through the first light passing hole, the inner hole, the second light passing hole and the third light passing hole to photograph the object to be tested placed on the test platform.

7. The film stain detection device according to claim 6, characterized in that: A circular mark is provided on the upper surface of the test platform, and the interior of the circular mark is a region for placing the object to be tested; the projection of the first light through the hole on the test platform surrounds the region for placing the object to be tested.

8. The film stain detection device according to claim 7, characterized in that: The bracket body includes a horizontal fixing plate and a vertical fixing plate vertically connected to one side of the horizontal fixing plate; the horizontal fixing plate is fixedly connected to the bottom plate; and the camera connecting member is slidably connected to the vertical fixing plate.

9. The film stain detection device according to claim 8, characterized in that: The vertical fixing plate is provided with a first waist-shaped hole extending vertically, and a connecting protrusion is provided on one side of the camera connecting piece. The connecting protrusion is located in the first waist-shaped hole and is fixedly connected to the vertical fixing plate through a first locking screw.

10. The film stain detection device according to claim 9, characterized in that: It also includes a second locking screw; the horizontal fixing plate is provided with a horizontally arranged second waist-shaped hole, the bottom plate is provided with a threaded hole, and the second locking screw passes through the second waist-shaped hole and is connected to the threaded hole.

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