Anti-dazzling screen of LED backlight source

Abstract

The utility model discloses an anti-dazzling screen of an LED backlight source. The anti-dazzling screen comprises a lens body and an anti-dazzling screen body. The protection mechanism comprises a fixing ring, a plurality of columnar guide rods are fixedly connected to the left side of the fixing ring at intervals, a plurality of guide openings are formed in the anti-dazzling screen body, the columnar guide rods all penetrate through the guide openings and are in sliding connection with the guide openings, and a pulling ring is arranged on the columnar guide rods in a penetrating mode jointly. The pulling ring is located on the left side of the anti-dazzling screen body. The first connecting mechanism is used for connecting the pulling ring and the fixing ring; the second connecting mechanism is used for connecting the fixing ring and the lens body, and the left side of the anti-dazzling screen body is connected with the right side of the pulling ring. The anti-dazzling screen is used in cooperation with a protection mechanism, the service life of the anti-dazzling screen can be effectively prolonged, in addition, a spring is further arranged, and follow-up replacement of the anti-dazzling screen is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of shading sheets, in particular to a shading sheet of an LED backlight source. Background Art

[0002] The shading sheet is also called the light shielding sheet. It is a necessary shading element in the fields of video cameras, mobile phone cameras, etc. Its purpose is to prevent stray light from entering the viewfinder and affecting the quality of imaging. The shading sheet used in the camera is also called the aperture, shading circle, Mylar sheet, etc. The thickness of this shading sheet is generally between 0.025 and 0.012 mm, and its center hole is the light hole. In fact, the light rays do not always remain parallel. Because of the difference in strength, the light rays will also cross each other, so the side wall of the center hole will always reflect the light, and part of it will further enter the viewfinder;

[0003] The backlight shading sheets currently on the market are only a simple sheet structure during use, so the overall protection performance is poor, which leads to a low overall service life. In addition, if the current backlight shading sheets need to be replaced, the replacement operating fluid is more troublesome. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose a shading sheet for an LED backlight source. The use of a protective mechanism in conjunction with the shading sheet can effectively increase the service life of the shading sheet. In addition, a spring is also provided to facilitate the subsequent replacement of the shading sheet.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A shading sheet for an LED backlight source comprises a lens body and a shading sheet body; a protective mechanism, the protective mechanism comprising a fixed ring, a plurality of columnar guide rods are fixedly connected to the left lamp spacing of the fixed ring, a plurality of guide openings are opened on the shading sheet body, a plurality of the columnar guide rods all pass through the guide openings and are slidably connected at the guide openings, a pulling ring is commonly passed through the plurality of the columnar guide rods, and the pulling ring is located on the left side of the shading sheet body; a first connecting mechanism, the first connecting mechanism is used to connect the pulling ring and the fixed ring; and a second connecting mechanism, the second connecting mechanism is used to connect the fixed ring and the lens body.

[0007] Preferably, the left side of the shading sheet body contacts the right side of the pulling ring.

[0008] Preferably, the right side of the shading sheet body contacts the left side of the fixing ring.

[0009] Preferably, the first connecting mechanism is fixedly connected to two second connecting blocks at the front and rear sides of the fixing ring, and the front and rear grooves of the pulling ring are both fixedly connected to the first connecting blocks.

[0010] Preferably, each of the first connecting blocks is elastically connected to the corresponding second connecting block via a spring.

[0011] Preferably, the second connecting mechanism includes a connecting ring fixedly connected to the right side of the fixing ring, an outer side of the connecting ring is provided with an external thread layer, an annular groove is opened on the left side of the lens body, and an inner thread layer cooperating with the external thread layer is provided on the outer side of the annular groove.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] A protective mechanism is provided. Through the setting of a fixing ring and a pulling ring, during actual use, the fixing ring and the pulling ring can provide a good protective effect on the shading sheet body, thereby increasing its actual service life. In addition, a spring is provided. Through the use of structures such as a spring and a columnar guide rod, the operation is extremely convenient when the shading sheet body is replaced, thereby improving the convenience of actual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of a light shielding sheet of an LED backlight source proposed by the utility model;

[0015] Figure 2 for Figure 1 A cross-sectional view of the mounting assembly;

[0016] Figure 3 for Figure 2 A magnified image of point A;

[0017] Figure 4 for Figure 1 Schematic diagram of the shading plate body.

[0018] In the figure: 1 lens body, 2 annular groove, 3 connecting ring, 4 external thread layer, 5 spring, 6 columnar guide rod, 7 pulling ring, 8 fixing ring, 9 shading plate body, 10 first connecting block, 11 second connecting block, 12 guide port. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-Figure 4 , a light shielding sheet of an LED backlight source, comprising a lens body 1 and a light shielding sheet body 9;

[0021] Among them, it also includes a protection mechanism, which includes a fixed ring 8, a plurality of columnar guide rods 6 are fixedly connected to the left lamp spacing of the fixed ring 8, a plurality of guide openings 12 are opened on the shading sheet body 9, and the plurality of columnar guide rods 6 all penetrate the guide openings 12 and are slidably connected to the guide openings 12, and a pulling ring 7 is commonly penetrated on the plurality of columnar guide rods 6, and the pulling ring 7 is located on the left side of the shading sheet body 9, the left side of the shading sheet body 9 contacts the right side of the pulling ring 7, and the right side of the shading sheet body 9 contacts the left side of the fixed ring 8, and the shading sheet body 9 can be protected as a whole by using the pulling ring 7 and the fixed ring 8;

[0022] The first connecting mechanism is also included, and the first connecting mechanism is used to connect the pulling ring 7 and the fixing ring 8. The first connecting mechanism is fixedly connected to the two second connecting blocks 11 on the front and rear sides of the fixing ring 8. The front and rear grooves of the pulling ring 7 are fixedly connected with the first connecting blocks 10, and each first connecting block 10 is elastically connected to the corresponding second connecting block 11 through the spring 5.

[0023] It also includes a second connecting mechanism, which is used to connect the fixing ring 8 and the lens body 1. The second connecting mechanism includes a connecting ring 3 fixedly connected to the right side of the fixing ring 8. An external thread layer 4 is arranged on the outer side of the connecting ring 3. An annular groove 2 is opened on the left side of the lens body 1. An internal thread layer matching the external thread layer 4 is arranged on the outer side of the annular groove 2. The connecting ring 3 can be connected to the lens body 1 through the external thread layer 4 and the internal thread layer.

[0024] In the present invention, when in use, the connecting ring 3 can be connected to the lens body 1 through the cooperation of the external thread layer 4 and the internal thread layer, and the light shielding sheet body 9 is used for light shielding;

[0025] By using the pulling ring 7 and the fixing ring 8, the entire shading sheet body 9 can be protected. When the shading sheet body 9 needs to be replaced, it is only necessary to pull the pulling ring 7 to the left so that the right side of the pulling ring 7 is no longer in contact with the columnar guide rod 6, and then remove the shading sheet body 9. After replacing a shading sheet body 9, let the multiple guide openings 12 on the shading sheet body 9 correspond to the columnar guide rod 6, release the pulling ring 7, and under the elastic action of the spring 5, the pulling ring 7 moves back to limit the shading sheet body 9 to complete the replacement.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A light shielding sheet for an LED backlight source, characterized in that: include: A lens body (1) and a light shielding plate body (9); A protection mechanism, the protection mechanism comprising a fixed ring (8), a plurality of columnar guide rods (6) are fixedly connected to the left lamp spacing of the fixed ring (8), a plurality of guide openings (12) are opened on the shading sheet body (9), the plurality of columnar guide rods (6) all pass through the guide openings (12) and are slidably connected to the guide openings (12), a pulling ring (7) is commonly passed through the plurality of columnar guide rods (6), and the pulling ring (7) is located on the left side of the shading sheet body (9); A first connecting mechanism, the first connecting mechanism being used to connect the pulling ring (7) and the fixing ring (8); A second connecting mechanism, the second connecting mechanism is used to connect the fixing ring (8) and the lens body (1).

2. The light shielding sheet of the LED backlight source according to claim 1, characterized in that: The left side of the light shielding sheet body (9) contacts the right side of the pulling ring (7).

3. The light shielding sheet of the LED backlight source according to claim 1, characterized in that: The right side of the light shielding plate body (9) contacts the left side of the fixing ring (8).

4. The light shielding sheet of the LED backlight source according to claim 1, characterized in that: The first connection mechanism is fixedly connected to two second connection blocks (11) on the front and rear sides of the fixing ring (8), and the front and rear grooves of the pulling ring (7) are both fixedly connected to the first connection blocks (10).

5. The light shielding sheet of the LED backlight source according to claim 4, characterized in that: Each of the first connecting blocks (10) is elastically connected to a corresponding second connecting block (11) via a spring (5).

6. The light shielding sheet of the LED backlight source according to claim 1, characterized in that: The second connection mechanism comprises a connection ring (3) fixedly connected to the right side of the fixing ring (8), an outer side of the connection ring (3) is provided with an external thread layer (4), an annular groove (2) is provided on the left side of the lens body (1), and an inner thread layer cooperating with the outer thread layer (4) is provided on the outer side of the annular groove (2).

Images