Fixing structure of optical film assembly

Abstract

The utility model relates to the technical field of optical film fixing, in particular to a fixing structure of an optical film assembly, which comprises a back plate and an optical film arranged at the upper end of the back plate. Positioning pieces are fixed to the left and right ends of the optical film, positioning blocks are connected to the lower ends of the positioning pieces, positioning grooves are formed in the left and right sides of the upper end of the back plate, and the positioning blocks are matched with the positioning grooves; fixing plates fixed to the upper end of the back plate are arranged on the outer sides of the positioning pieces, clamping grooves are formed in the inner sides of the fixing plates, clamping blocks are clamped in the clamping grooves, and pressing plates are arranged above the positioning pieces; according to the utility model, the positioning block is inserted into the positioning groove, so that the optical film can be quickly and accurately mounted on the back plate, the mounting time is saved, the deviation in the mounting process of the optical film is prevented, the mounting accuracy is effectively ensured, the optical film can be prevented from being damaged by clamping, and the production efficiency is improved. And the installation and use quality of the optical film is effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of optical film fixing, in particular to a fixing structure of an optical film assembly. Background Art

[0002] The main optical thin film devices include reflective films, anti-reflective films, polarizing films, interference filters and spectroscopes, etc. Optical films are composed of thin layered media and are a type of optical medium material that propagates light beams through interfaces. The application of optical thin films began in the 1930s. Nowadays, optical thin films have been widely used in the fields of optics and optoelectronics to manufacture various optical instruments.

[0003] The Chinese patent authorization announcement number CN218630451U discloses an optical film fixing structure of a backlight module, including a back plate and an optical film, the back plate including a bottom plate, a side wall and a top plate, the side wall is formed by bending upwards the edge of any side of the bottom plate, the top plate is formed by bending the edge of the side wall and extending upwards, a pressing block is arranged on the top plate, the pressing block cooperates with the back plate to form an inner "U"-shaped accommodating cavity, the accommodating cavity is used to place the optical film, and a snap assembly for easy adjustment is arranged on the top plate; the utility model forms a snap-fit ​​fixing structure for the optical film through the cooperation between the pressing block and the back plate, and uses the snap assembly as an installation fixing part to replace the screw, thereby improving the assembly efficiency between the optical film and the back plate of the backlight module, avoiding the problem of slipping teeth and the like in the screw fixing form that affects the yield rate of the optical film assembly of the backlight module, and avoiding the screw fixing form scratching the optical film and increasing the assembly cost of the liquid crystal display.

[0004] By reviewing the above comparative documents, it can be seen that the prior art still has the following deficiencies. During the assembly process of the optical film and the back panel, due to the lack of measures for accurately positioning the optical film on the back panel during installation, there may be deviations in the installation process of the optical film, affecting the installation accuracy. In addition, the optical film is directly pressed on the optical film by a pressure block. This fixed assembly method may directly damage the optical film and affect the quality of the optical film. Utility Model Content

[0005] The utility model provides a fixing structure of an optical film assembly, which is conducive to quickly and accurately positioning and installing the optical film on a back plate, and is conducive to preventing the optical film from being crushed during the installation process.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The fixing structure of the optical film assembly comprises a back plate and an optical film, wherein the optical film is arranged at the upper end of the back plate;

[0008] The left and right ends of the optical film are fixed with positioning pieces, the lower ends of the positioning pieces are connected with positioning blocks, the left and right sides of the upper end of the back plate are provided with positioning grooves, and the positioning blocks match the positioning grooves;

[0009] The outer side of each positioning piece is provided with a fixing plate fixed to the upper end of the back plate, the inner side of each fixing plate is provided with a card slot, a card block is clamped in the card slot, a pressure plate is provided above each positioning piece, a first contraction groove is provided on the outer side of each pressure plate, at least two first spring pressure rods are connected between the card block and the inner wall of the first contraction groove, and an elastic pushing component is provided in each fixing plate;

[0010] An elastic tensioning component is provided under the pressing plate.

[0011] Furthermore, the lower end surface of the block is inclined.

[0012] Furthermore, the elastic pushing components include a push plate, a push rod and two return springs. A groove is opened on the outer side of the fixed plate. The push plate, push rod and return spring are all arranged in the groove. A through groove is opened in the fixed plate. The groove is connected with the card slot through the through groove.

[0013] Furthermore, the push rod and the return spring are both connected to the inner side of the push plate, the end of the push rod extends into the through groove, and the end of the return spring is connected to the inner wall of the groove.

[0014] Furthermore, the elastic tensioning components all include a tensioning block and at least two second spring pressure rods, the upper ends of the positioning pieces are all provided with tensioning grooves, and the tensioning blocks are all matched in the tensioning grooves.

[0015] Furthermore, a second contraction groove is formed at the lower end of the pressure plate, the second spring pressure rod is connected to the upper end of the tensioning block, and the end of the second spring pressure rod is connected to the top end of the second contraction groove.

[0016] Beneficial effects of the utility model:

[0017] 1. By inserting the positioning block into the positioning groove, the optical film can be quickly and accurately installed on the back panel, saving installation time and preventing deviation during the installation of the optical film, effectively ensuring installation accuracy;

[0018] 2. The elastic force of the first spring pressure rod drives the card block to be inserted into the card slot, and the elastic force of the second spring drives the tensioning block to be tensioned in the tensioning slot, which is beneficial to always apply an elastic clamping tensioning force to the positioning piece to avoid loosening of the positioning piece and the optical film. In addition, the pressure plate is pressed on the positioning piece, so there is no direct contact with the optical film when fixing it, thereby avoiding the optical film from being clamped and effectively ensuring the quality of the installation and use of the optical film. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the overall internal structure of the utility model;

[0021] Figure 3 A is a schematic diagram of the enlarged structure of the local area of ​​the utility model;

[0022] Figure 4 It is a schematic diagram of the overall top view structure of the utility model;

[0023] Figure 5 It is a schematic diagram of the top view structure of the optical film of the utility model.

[0024] Description of reference numerals:

[0025] Back plate 1, optical film 2, positioning plate 3, fixing plate 4, pressure plate 5, positioning groove 6, positioning block 7, first contraction groove 8, first spring pressure rod 9, clamping block 10, clamping groove 11, second contraction groove 12, second spring pressure rod 13, tensioning block 14, tensioning groove 15, through groove 16, groove 17, push plate 18, return spring 19, push rod 20. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0027] like Figure 1-3 As shown, in this embodiment, it includes a back panel 1 and an optical film 2, the optical film 2 is arranged at the upper end of the back panel 1, the left and right ends of the optical film 2 are fixed with positioning pieces 3, the lower ends of the positioning pieces 3 are connected with positioning blocks 7, the left and right sides of the upper end of the back panel 1 are provided with positioning grooves 6, the positioning blocks 7 are matched with the positioning grooves 6, and the lower end surface of the blocking block 10 is inclined.

[0028] When the optical film 2 is installed on the back panel 1, the positioning block 7 is inserted into the positioning groove 6, so that the optical film 2 can be quickly and accurately installed on the back panel 1, saving installation time and preventing deviations from occurring during the installation of the optical film 2, thereby effectively ensuring installation accuracy.

[0029] like Figure 2-5As shown, in this embodiment, a fixing plate 4 fixed to the upper end of the back plate 1 is provided on the outer side of the positioning piece 3, a card slot 11 is opened on the inner side of the fixing plate 4, a card block 10 is clamped in the card slot 11, a pressure plate 5 is provided above the positioning piece 3, a first shrinkage groove 8 is opened on the outer side of the pressure plate 5, at least two first spring pressure rods 9 are connected between the card block 10 and the inner wall of the first shrinkage groove 8, an elastic tensioning component is provided below the pressure plate 5, the elastic tensioning component includes a tensioning block 14 and at least two second spring pressure rods 13, a tensioning groove 15 is opened on the upper end of the positioning piece 3, the tensioning block 14 is matched in the tensioning groove 15, a second shrinkage groove 12 is opened on the lower end of the pressure plate 5, the second spring pressure rod 13 is connected to the upper end of the tensioning block 14, and the end of the second spring pressure rod 13 is connected to the top end of the second shrinkage groove 12.

[0030] When the optical film 2 needs to be fixed on the back plate 1, the pressure plate 5 is docked on the positioning plate 3. During this process, the fixing plate 4 will push the card block 10 into the first contraction groove 8 along the inclined surface of the card block 10, and the card block 10 will compress the first spring pressure rod 9 until the card block 10 is aligned with the notch of the card slot 11. Combined with the elastic force of the first spring pressure rod 9, the card block 10 will automatically be inserted into the card slot 11. At this time, the pressure plate 5 is pressed tightly on the optical film 2, and the tensioning block 14 will be inserted into the tensioning groove 15, and the tensioning block 14 will compress the second spring pressure rod 13. Then, combined with the elastic force of the second spring pressure rod 13, the tensioning block 14 will be driven to be pressed tightly in the tensioning groove 15. Since the first spring pressure rod 9 is squeezed and contracted, the first spring pressure rod 9 The elastic force generated by the spring pressure rod 9 will apply a thrust to the pressure plate 5 in the direction of the optical film 2, and this thrust will drive the tensioning block 14 to be tensioned on the inner wall of the tensioning groove 15, and after the second spring pressure rod 13 is squeezed and contracted, the second spring pressure rod 13 will apply an upward thrust to the pressure plate 5, so the pressure plate 5 will drive the clamping block 10 to be tensioned on the inner top end of the tensioning groove 15. In summary, it is beneficial to always apply an elastic clamping tensioning force to the positioning plate 3 to prevent the positioning plate 3 and the optical film 2 from loosening, and the pressure plate 5 is pressed on the positioning plate 3, so there is no direct contact with the optical film 2 when fixing it, thereby preventing the optical film 2 from being clamped and damaged, effectively ensuring the quality of installation and use of the optical film 2.

[0031] like Figure 2 , 3As shown, in this embodiment, an elastic pushing component is provided in the fixed plate 4, and the elastic pushing component includes a push plate 18, a push rod 20 and two return springs 19. A groove 17 is opened on the outer side of the fixed plate 4, and the push plate 18, the push rod 20 and the return spring 19 are all arranged in the groove 17. A through groove 16 is opened in the fixed plate 4, and the groove 17 is communicated with the card slot 11 through the through groove 16. The push rod 20 and the return spring 19 are both connected to the inner side of the push plate 18, and the end of the push rod 20 extends into the through groove 16, and the end of the return spring 19 is connected to the inner wall of the groove 17.

[0032] When the optical film 2 needs to be removed, the push plate 18 is pushed into the groove 17, and the push plate 18 will drive the push rod 20 to pass through the through groove 16, and the push rod 20 will push the card block 10 out of the card slot 11. After the card block 10 compresses the first spring pressure rod 9, the card block 10 is retracted into the first retractable groove 8 until the card block 10 moves out of the card slot 11, and then the elastic force of the second spring pressure rod 13 will drive the pressure plate 5 to automatically move up. At this time, the pressure plate 5 can be easily removed from the positioning plate 3, and the optical film 2 can be easily removed.

[0033] All technical features in this embodiment can be freely combined according to actual needs.

[0034] The above embodiments are preferred implementation schemes of the present invention. In addition, other implementation schemes are also included. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A fixing structure of an optical film assembly, comprising a back plate (1) and an optical film (2), wherein the optical film (2) is arranged on the upper end of the back plate (1), and is characterized in that: Positioning plates (3) are fixed to the left and right ends of the optical film (2), and positioning blocks (7) are connected to the lower ends of the positioning plates (3). Positioning grooves (6) are formed on the left and right sides of the upper end of the back plate (1), and the positioning blocks (7) match the positioning grooves (6). The outer side of the positioning piece (3) is provided with a fixing plate (4) fixed to the upper end of the back plate (1), the inner side of the fixing plate (4) is provided with a slot (11), a clamping block (10) is clamped in the slot (11), a pressing plate (5) is provided above the positioning piece (3), the outer side of the pressing plate (5) is provided with a first shrinking groove (8), at least two first spring pressure rods (9) are connected between the clamping block (10) and the inner wall of the first shrinking groove (8), and an elastic pushing component is provided in the fixing plate (4); An elastic tensioning component is provided below the pressing plate (5).

2. The fixing structure of the optical film assembly according to claim 1, characterized in that: The lower end surface of the clamping block (10) is inclined.

3. The fixing structure of the optical film assembly according to claim 1, characterized in that: The elastic pushing components include a push plate (18), a push rod (20) and two return springs (19); a groove (17) is formed on the outer side of the fixed plate (4); the push plate (18), the push rod (20) and the return spring (19) are arranged in the groove (17); a through groove (16) is formed in the fixed plate (4); the groove (17) is communicated with the card slot (11) through the through groove (16).

4. The fixing structure of the optical film assembly according to claim 3, characterized in that: The push rod (20) and the return spring (19) are both connected to the inner side of the push plate (18); the end of the push rod (20) extends into the through groove (16); and the end of the return spring (19) is connected to the inner wall of the groove (17).

5. The fixing structure of the optical film assembly according to claim 1, characterized in that: The elastic tensioning components all include a tensioning block (14) and at least two second spring pressure rods (13); the upper end of the positioning piece (3) is provided with a tensioning groove (15); and the tensioning blocks (14) are matched in the tensioning groove (15).

6. The fixing structure of the optical film assembly according to claim 5, characterized in that: The lower end of the pressure plate (5) is provided with a second contraction groove (12), the second spring pressure rod (13) is connected to the upper end of the tensioning block (14), and the end of the second spring pressure rod (13) is connected to the top end of the second contraction groove (12).

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