Light guide plate limiting assembly fixture and use method thereof

Abstract

The present application relates to a light guide plate position limiting assembly jig and a method for using the same. The light guide plate position limiting assembly jig includes a base, which is provided with a product fixing groove for placing an FPCA; a cover plate, which is flipped over to cover the base, and has a hinged part hinged to the base on one side, and a mounting through hole connected to the product fixing groove on the end face; the product fixing groove has a first placement position for placing the FPCA, the product fixing groove has a second placement position for placing the FPCA light bar on the side close to the hinge, and the product fixing groove has a third placement position for inserting the light guide plate; a protective strip, which is provided on the cover plate, and has a fourth placement position for inserting the protective strip in the product fixing groove; the protective strip is located between the second placement position and the third placement position, and the side of the protective strip facing the third placement position protrudes from the side of the FPCA light bar facing the third placement position in a direction close to the third placement position. The present application assembles the light guide plate and the FPCA, and the protective strip can prevent the light guide plate from hitting the FPCA light bar.

Description

Technical Field

[0001] The present application relates to the field of display screen assembly devices, and in particular to a light guide plate limiting assembly fixture and a method for using the same. Background Art

[0002] Current LCD screens primarily utilize edge-lit LED backlights. When assembling an LED display, the LEDs and NTC (thermistor) must first be soldered to a flexible printed circuit board (FPCA) to form the FPCA. The LEDs and NTC located on the FPCA form the FPCA light strip. The light guide plate (LGP) is then mounted on the FPCA. The FPCA light strip is now positioned to one side of the LGP. Ideally, the light from the LED light strip is 100% transmitted through the LGP, but this requires full contact between the LGP and the LED light strip.

[0003] In actual assembly, a gap is inevitably created between the light guide plate and the LED light strip. The smaller the gap, the shorter the distance the LED light strip enters, and the clearer and more uniform the image displayed by the light guide plate. Therefore, in order to reduce the gap between the light guide plate and the LED light strip, the light guide plate is placed as close to the LED light strip as possible during assembly.

[0004] However, with this installation method, the position of the light guide plate will shift and shake when it is placed on the FPCA. At this time, the light guide plate is very likely to squeeze the FPCA light bar, causing damage to the FPCA light bar. This damage will lead to an increase in assembly waste and increase the assembly cost of the display. Summary of the Invention

[0005] In order to avoid the light guide plate from damaging the FPCA light bar during assembly, improve the assembly success rate of the light guide plate, and reduce the assembly cost of the display screen, the present application provides a light guide plate limiting assembly fixture and a method for using the same.

[0006] In the first aspect, the present application provides a light guide plate limiting assembly fixture that adopts the following technical solutions:

[0007] A light guide plate limiting assembly fixture, comprising

[0008] The upper surface of the base is provided with a product fixing groove for placing FPCA;

[0009] The cover is flipped over and closed on the base. A hinged part hinged to the base is provided on one side, and a mounting hole connected to the product fixing groove is provided on the end surface facing away from the base;

[0010] The product fixing groove has a first placement position for placing the FPCA, a second placement position for placing the FPCA light bar on the side of the product fixing groove close to the hinge, and a third placement position for inserting the light guide plate in the product fixing groove above the FPCA;

[0011] A protective strip is provided on the end surface of the cover plate facing the base, and a fourth placement position for inserting the protective strip is provided in the product fixing groove;

[0012] The protection strip is located between the hinge and the light guide plate, and a side of the protection strip facing the third placement position is protruded from a side of the FPCA light bar facing the third placement position in a direction close to the third placement position.

[0013] By adopting the above technical solution, the moving distance between the light guide plate and the FPCA light bar can be limited by the protective strip. When the light guide plate moves in the direction close to the FPCA light bar, the light guide plate first contacts the protective strip, thereby minimizing the light guide plate from damaging the FPCA light bar during assembly, thereby improving the assembly success rate of the light guide plate and reducing the assembly cost of the display screen.

[0014] Optionally, a first gap is provided between the fourth placement position and the third placement position, and a second gap is provided between the fourth placement position and the second placement position.

[0015] By adopting the above technical solution, the light guide plate, LED light bar and NTC are not in contact with the protective strip through the first gap and the second gap, thereby isolating the light guide plate and FPCA light bar while protecting them.

[0016] Optionally, a tolerance gap is provided between the upper end surface of the base and the second placement position along the vertical direction, and the tolerance gap ranges from 0.3 mm to 0.5 mm.

[0017] By adopting the above technical solution, the tolerance gap ensures that when the cover plate is covered on the base, the cover plate does not contact the FPCA light bar, thereby protecting the FPCA light bar.

[0018] Optionally, the cover plate is provided with a limiting member for limiting the horizontal position of the light guide plate, and a plurality of the limiting members are circumferentially spaced around the mounting through hole.

[0019] By adopting the above technical solution, the light guide plate can reduce the horizontal shaking amplitude when it enters the third placement position through the limiter, and at the same time guide the light guide plate to move downward, thereby reducing the probability of the light guide plate colliding with the hole wall and protective strip of the installation hole.

[0020] Optionally, the limiting member includes a second elastic piece, which is located in the mounting through hole and has one end connected to the cover plate, and the other end of the second elastic piece is arranged obliquely downward in a direction away from the hole wall of the mounting through hole.

[0021] By adopting the above technical solution, when the light guide plate moves in the installation hole, the light guide plate presses the second elastic sheet so that the second elastic sheet deforms and rotates downward. At the same time, the second elastic sheet applies an opposite elastic force to the light guide plate, thereby limiting the position of the light guide plate.

[0022] Optionally, an anti-collision gap is provided between the rotation track of the protection bar and the third placement position.

[0023] By adopting the above technical solution, when the light guide plate and FPCA are assembled, the cover plate needs to be flipped off the base, and then the assembled light guide plate and FPCA are taken out together. When the cover plate is flipped off the base, the protective strip rotates with the cover plate. The anti-collision gap can reduce the probability of the protective strip colliding with the light guide plate during flipping, causing the position of the light guide plate to change, thereby protecting the light guide plate.

[0024] Optionally, two side walls of the base arranged opposite to each other are provided with handle grooves, the hinge is located between the handle grooves, and the handle grooves pass through the upper end surface and the lower end surface of the base and are connected to the product fixing groove.

[0025] By adopting the above technical solution, the handle groove allows the FPCA to maintain horizontal movement when the staff takes and places the FPCA, thereby reducing the difficulty of taking and placing the FPCA.

[0026] Optionally, a positioning guide post is provided on the cover plate, and the positioning guide post is located on the side of the mounting through hole away from the hinged member, and a positioning slot for sliding insertion of the positioning guide post is provided on the upper end surface of the base;

[0027] A first magnet is provided on the cover plate, and the first magnet is located on the side of the mounting through hole away from the hinge. A second magnet adsorbed to the first magnet is provided on the upper end surface of the base.

[0028] By adopting the above technical solution, when the cover is closed on the base, the positioning guide pin is inserted into the positioning slot for guidance, and the first magnet and the second magnet are attracted to each other to strengthen the connection strength between the cover and the base, reducing the probability of the cover changing position in the absence of external force.

[0029] Optionally, a first handle is provided on a side of the base away from the hinge, and a second handle is provided on a side of the cover away from the hinge, and the first handle and the second handle are staggered in the horizontal direction.

[0030] By adopting the above technical solution, the difficulty for the staff to control the cover to flip upward or downward is reduced by the first handle and the second handle, so that the staff can operate the assembly jig more easily.

[0031] In the second aspect, the present application provides a method for using a light guide plate limiting assembly fixture, using a light guide plate limiting assembly fixture, including the following steps:

[0032] S1. Flip the cover upwards to keep it away from the base, then place the FPCA in the first position of the product fixing slot on the base, with the FPCA light bar in the second position.

[0033] S2. Flip the cover downward so that it covers the base;

[0034] S3. Assemble the light guide plate and place it through the mounting hole into the third placement position. The side of the protective strip facing the third placement position is protruded from the side of the FPCA light bar facing the third placement position in the direction close to the third placement position.

[0035] By adopting the above technical solution, the FPCA is limited by the product fixing groove, and the FPCA light bar and the light guide plate are isolated by the protective strip to protect the FPCA light bar, thereby minimizing the probability of the light guide plate hitting the FPCA light bar, improving the assembly success rate of the light guide plate, and reducing the assembly cost of the display screen.

[0036] In summary, this application includes at least one of the following beneficial technical effects:

[0037] 1. When the light guide plate moves in the direction close to the FPCA light bar, the light guide plate first contacts the protective strip, thereby minimizing the probability of the light guide plate hitting the FPCA light bar, improving the success rate of light guide plate assembly, and reducing the assembly cost of the display screen;

[0038] 2. Through the first gap and the second gap, the light guide plate and the FPCA light bar are isolated and protected at the same time;

[0039] 3. The anti-collision gap can reduce the probability that the protective strip collides with the light guide plate when flipping, causing the position of the light guide plate to change, thereby protecting the light guide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a connection diagram of FPCA and FPCA light strip.

[0041] Figure 2 It is a structural diagram of the light guide plate.

[0042] Figure 3 This is a schematic diagram of the overall structure of a light guide plate limiting assembly fixture according to an embodiment of the present application.

[0043] Figure 4 It is a structural schematic diagram of the base in an embodiment of the present application.

[0044] Figure 5 It is a structural schematic diagram of the cover plate in an embodiment of the present application.

[0045] Figure 6 It is a schematic diagram of the positions of assembling the light guide plate and the FPCA in the embodiment of the present application.

[0046] Figure 7 Schematic diagram of the connection between the light guide plate and the FPCA in the assembly fixture in the embodiment of the present application.

[0047] Figure 8 Schematic diagram of the hinged connection between the cover and the base in the embodiment of the present application.

[0048] In the figure: 1. Base; 11. Product fixing slot; 111. First placement position; 112. Second placement position; 113. Third placement position; 114. Fourth placement position; 115. First gap; 116. Second gap; 117. Anti-collision gap; 118. Tolerance gap; 12. Handle slot; 13. Positioning slide; 2. Cover plate; 21. Mounting through hole; 3. Hinge; 31. Hinge seat; 32. Hinge rod; 33. Hinge bearing; 4. Protective strip; 5. Limiting member; 51. First spring piece; 52. Second spring piece; 6. First handle; 7. Second handle; 8. Positioning guide column; 9. First magnet; 10. Second magnet; 1001. FPCA; 1002. FPCA light strip; 1003. Light guide plate; 1004. Limiting column; 1005. Limiting slot; 1006. Double-sided adhesive release film. DETAILED DESCRIPTION

[0049] The following is combined with Figure 1-8 This application is described in further detail.

[0050] refer to Figure 1 and Figure 2 An LED light strip and an NTC are welded to one end of the FPCA1001. These two components are located on the same side of the FPCA1001, forming the FPCA light strip 1002. A double-sided adhesive release film 1006 is placed at the center of the end of the FPCA1001 where the FPCA light strip 1002 is welded. This double-sided adhesive release film 1006 facilitates the bonding of the light guide plate 1003 to the FPCA1001.

[0051] The embodiment of the present application discloses a light guide plate limiting assembly fixture. Figure 3 The assembly fixture includes a base 1, a cover plate 2, a hinge 3, a protective strip 4 and a limiter 5.

[0052] like Figure 3 and Figure 4As shown, the upper surface of the base 1 defines a product securing slot 11 for accommodating the FPCA 1001. A cover 2 is connected to a hinge 3 on one side and hingedly connected to the base 1 via the hinge 3, allowing the cover 2 to be flipped downward to cover the base 1 or flipped upward away from the base 1. When the FPCA 1001 is placed in the product securing slot 11, the FPCA light bar 1002 is located on the side of the slot 11 closest to the hinge 3.

[0053] like Figure 3 and Figure 5 As shown, the end face of the cover plate 2 facing away from the base 1 includes a mounting hole 21 that connects to the product fixing slot. When the cover plate 2 is placed over the base 1, the mounting hole 21 is positioned above the product fixing slot, allowing the light guide plate 1003 to pass through the mounting hole 21 and bond to the FPCA 1001. A protective strip 4 is fixed to the end face of the cover plate 2 facing the base 1, and a stopper 5 is attached to the cover plate 2 to limit the horizontal position of the light guide plate 1003 within the mounting hole.

[0054] Among them, such as Figure 6 and Figure 7 As shown, the product fixing groove 11 has a first placement position 111 for placing FPCA1001, the side of the product fixing groove 11 close to the hinge 3 has a second placement position 112 for placing the FPCA light strip 1002, the product fixing groove 11 located above the FPCA1001 has a third placement position 113 for inserting the light guide plate 1003, and the product fixing groove has a fourth placement position 114 for inserting the protective strip 4. The second placement position 112, the third placement position 113 and the fourth placement position 114 are all located above the first placement position 111.

[0055] When the cover 2 is closed over the base 1, the protective strip 4 is located in the fourth placement position 114. At this time, one side of the protective strip 4 faces the hinge 3, and the other side, which is arranged oppositely, faces the third placement position 113. The side of the protective strip 4 facing the third placement position 113 protrudes from the side of the FPCA light bar 1002 facing the third placement position 113, along the direction closer to the protective strip 4. This minimizes the light guide plate 1003 from colliding with the FPCA light bar 1002 when placed in the third placement position 113, thereby protecting the FPCA light bar 1002. Overall, this minimizes the light guide plate from colliding with the FPCA light bar 1002 during assembly, thereby improving the success rate of light guide plate 1003 assembly and reducing the assembly cost of the display screen. At the same time, the protective strip 4 and the cover plate 2 are integrally formed as a whole. The side of the protective strip 4 facing the light guide plate 1003 is flush with the hole wall of the installation hole 21 facing the hinge 3, thereby simplifying the molding process of the cover plate 2 and reducing the probability of the light guide plate 1003 colliding with the protective strip 4 when inserted into the installation sliding hole.

[0056] In addition, a plurality of position limiting members 5 are circumferentially spaced around the mounting through hole 21. When the light guide plate 1003 enters the third placement position 113, the light guide plate 1003 must first enter the mounting slide hole. The position limiting members 5 can limit the horizontal position of the light guide plate 1003, thereby reducing the amplitude of the positional fluctuation of the light guide plate 1003 when connected to the FPCA 1001, improving the positional accuracy of the light guide plate 1003 when connected to the FPCA 1001, and further reducing the probability of the light guide plate 1003 colliding with the FPCA light bar 1002 due to horizontal fluctuation.

[0057] Reference Figure 3 and Figure 8 The hinge 3 includes a hinge seat 31 and a hinge rod 32. Two hinge seats 31 are mounted on the base 1, with the cover 2 positioned between the two hinge seats 31. The hinge rod 32 is mounted on the cover 2. A hinge hole for the hinge rod 32 is defined on the side wall of the hinge seat 31 facing the cover 2. A hinge bearing 33 is mounted within the hinge hole of the hinge seat 31. The hinge bearing 33 allows the hinge rod 32 to rotate about its axis with the hinge seat 31, thereby enabling the cover 2 to flip upward and downward.

[0058] In order to smoothly take and place FPCA1001, reduce the degree of tilt when FPCA1001 is placed in or taken out of the product fixing slot 11, refer to Figure 3 The base 1 has handle slots 12 on both sidewalls, running along the axis of the hinged lever 32. These slots extend through the upper and lower surfaces of the base 1 and connect to the product securing slot 11. When placing the FPCA 1001, the user can hold the FPCA 1001 with both hands and place it into the product securing slot 11. The handle slots 12 provide space for the user to remove the FPCA 1001 horizontally. They also allow the user to remove the FPCA 1001 and the attached light guide plate 1003 horizontally from the product securing slot 11, facilitating assembly.

[0059] At the same time, in order to facilitate the control of the cover 2 covering or turning away from the base 1, refer to Figure 3 A first handle 6 is provided on the side of the base 1 facing away from the hinge 3. A second handle 7 is provided on the side of the cover 2 facing away from the hinge 3. The first handle 6 and the second handle 7 are arranged horizontally staggered. The operator holds the first handle 6 and the second handle 7 with both hands. This increases the contact area between the operator and the assembly jig when controlling the cover 2 to flip, reduces the difficulty of flipping the cover 2, and further facilitates the operator's assembly.

[0060] Reference Figure 4 and Figure 5The cover plate 2 is provided with a positioning guide post 8, which is located on the side of the mounting hole 21 away from the hinge 3. The upper end surface of the base 1 is provided with a positioning slot 13 for the positioning guide post 8 to slide into. The cover plate 2 is provided with a first magnet 9, which is located on the side of the mounting hole 21 away from the hinge 3. The upper end surface of the base 1 is provided with a second magnet 10 that is attracted to the first magnet 9.

[0061] When the cover 2 is placed on the base 1, the positioning guide pins 8 slide into the positioning slots 13 to guide the cover 2 into position. The first magnets 9 and the second magnets 10 attract each other, strengthening the connection between the cover 2 and the base 1 in the absence of external forces, minimizing the possibility of the cover 2 moving relative to the base 1 and improving the positional accuracy of the connection between the light guide plate 1003 and the FPCA 1001. This, in turn, strengthens the overall structural strength of the connection between the cover 2 and the base 1.

[0062] Since the protection bar 4 can prevent the light guide plate 1003 from moving in the direction close to the FPCA light bar 1002, the protection bar 4 can limit the shaking amplitude of the light guide plate 1003 in the direction close to the FPCA light bar 1002, so the limiting member 5 is not provided around the hole wall of the mounting hole 21 facing the protection bar 4. Figure 3 and Figure 5 The limiting member 5 includes a first spring clip 51 and a second spring clip 52. The first spring clip 51 is horizontally mounted on the end surface of the cover plate 2 facing away from the base 1, and the side of the first spring clip 51 facing the mounting hole 21 is located within the mounting hole 21. The second spring clip 52 is located within the mounting hole 21, and one end is connected to the side of the first spring clip 51 located within the mounting hole 21. The other end of the second spring clip 52 is arranged obliquely downward in a direction away from the first spring clip 51.

[0063] The first and second spring pieces 51, 52 are integrally formed. To ensure the required elastic deformation of the second spring piece 52, the thickness of the first and second spring pieces 51, 52 is preferably 0.2 mm, which can simultaneously provide the structural strength and elastic strength of the position-limiting member 5. The angle between the second spring piece 52 and the first spring piece 51 ranges from 90 degrees to 180 degrees. The first and second spring pieces 51, 52 are preferably made of a metal material such as stainless steel to maximize the structural strength of the first and second spring pieces 51, 52.

[0064] When the light guide plate 1003 is placed into the mounting slide hole, the light guide plate 1003 abuts against the end face of the second spring piece 52 and presses down the second spring piece 52, causing the second spring piece 52 to deform and rotate downward, so that the light guide plate can be limited by multiple limiting members 5 at the same time when placed in the second placement position 112, thereby limiting the horizontal position of the light guide plate when moving downward.

[0065] In order to make the protection strip 4 prevent the light guide plate 1003 from colliding with the FPCA light bar 1002 while not contacting the light guide plate 1003, FPCA1001 and FPCA light bar 1002, refer to Figure 6 A first gap 115 is provided between the fourth placement position 114 and the third placement position 113, and a second gap 116 is provided between the fourth placement position 114 and the second placement position 112. The bottom of the protective strip 4 is located between the top of the second placement position 112 and the top of the fourth placement position 114. This prevents the protective strip 4 from contacting the light guide plate 1003 or the FPCA light bar 1002. Simultaneously, when the cover 2 flips upward to move away from the base 1, the protective strip 4 rotates around the axis of the hinged rotating rod 32. To prevent the protective strip 4 from contacting the light guide plate 1003 when it moves away from the third placement position 113, an anti-collision gap 117 is provided between the rotation trajectory of the protective strip 4 and the fourth placement position 114.

[0066] Reference Figure 6 A tolerance gap 118 is vertically defined between the upper end surface of the base 1 and the second placement position 112. The tolerance gap 118 ranges from 0.3 mm to 0.5 mm. This prevents collision between the cover 2 and the FPCA light bar 1002 when the cover 2 is placed on the base 1. The tolerance gap 118 communicates with the first gap 115, and the range of the first gap 115 is greater than or equal to the range of the tolerance gap 118.

[0067] The implementation principle of a light guide plate limiting assembly fixture of an embodiment of the present application is as follows: when assembling the light guide plate 1003 and the FPCA 1001, first flip the cover plate 2 away from the base 1, then place the light guide plate 1003 in the product fixing groove 11, and the FPCA light bar 1002 is located on the side of the product fixing groove 11 facing the hinge 3, and then close the cover plate 2 until the positioning guide column 8 is inserted into the positioning slide groove 13, and the first magnet 9 and the second magnet 10 are adsorbed, and then press the light guide plate 1003 so that the light guide plate 1003 enters the third position through the mounting hole 21 and is bonded to the FPCA 1001 through the double-sided adhesive release film 1006, the second spring piece 52 is deformed to limit the light guide plate 1003, and the protective strip 4 isolates the light guide plate 1003 from the FPCA light bar 1002, and finally avoids the light guide plate 1003 from squeezing the FPCA light bar 1002 as much as possible, thereby improving the assembly success rate of the light guide plate 1003 and reducing the assembly cost of the display screen.

[0068] The present application also discloses a method for using a light guide plate limiting assembly fixture, comprising the following steps:

[0069] S1. Flip the cover plate 2 upward to keep it away from the base 1, then place the FPCA 1001 in the first placement position 111 of the product fixing slot 11 of the base 1, and the FPCA light bar 1002 in the second placement position 112.

[0070] S2. Flip the cover plate 2 downward so that the cover plate 2 covers the base 1 until the positioning guide post 8 is inserted into the positioning slot 13 and the first magnet 9 and the second magnet 10 are attracted to each other.

[0071] S4. Tear off the protective layer on the double-sided adhesive release film 1006 on the FPCA 1001 so that the light guide plate 1003 can be bonded to the FPCA 1001 through the double-sided adhesive release film 1006.

[0072] S5. Assemble the light guide plate 1003 and place the light guide plate 1003 through the mounting hole 21 into the third placement position 113. The side of the protective strip 4 facing the third placement position 113 is protruded from the side of the FPCA light strip 1002 facing the third placement position 113 in the direction close to the third placement position 113.

[0073] When the light guide plate 1003 enters the mounting hole 21, the second spring piece 52 deforms against the side wall of the light guide plate 1003. As the light guide plate 1003 continues to move downward, the second spring piece 52 deforms and flips downward, limiting the horizontal position of the light guide plate 1003 and reducing the horizontal shaking of the light guide plate 1003 when it is pressed.

[0074] Since the light guide plate 1003 has four corners, when the light guide plate 1003 is pressed so that the light guide plate 1003 is pressed against the FPCA1001, a limiting column 1004 is provided on the lower end surface of the light guide plate 1003 close to the FPCA light bar 1002, and a limiting groove 1005 is provided on the upper end surface of the FPCA1001 for the limiting column 1004 to be inserted. The limiting groove 1005 is located on the side of the protective strip 4 away from the FPCA light bar 1002, thereby positioning the position of the light guide plate 1003 on the FPCA1001.

[0075] Therefore, when the light guide plate 1003 is placed in the third placement position 113, in order to reduce the resistance of the light guide plate 1003 entering the installation slide hole and simultaneously determine the horizontal position of the light guide plate 1003, the light guide plate 1003 is arranged at an angle downward on the side facing the FPCA light bar 1002 when it enters the third placement position 113. At this time, the upper left corner and upper right corner of the light guide plate 1003 facing the FPCA light bar 1002 first enter the third placement position 113 and contact the FPCA 1001. At this time, the side of the light guide plate 1003 facing the FPCA light bar 1002 may abut against the protective strip 4, thereby protecting the FPCA light bar 1002, and the limiting post 1004 is aligned with the limiting slot 1005. Then, the light guide plate 1003 is placed into the mounting through holes 21 in sequence, away from the lower left and lower right corners of the FPCA light bar 1002, until the lower left and lower right corners of the light guide plate 1003 abut against the FPCA 1001 in sequence, and the side of the protective strip 4 facing the light guide plate 1003 protrudes from the side of the FPCA light bar 1002 facing the light guide plate 1003 in the direction close to the protective strip 4;

[0076] S6. Press down the periphery and center of the light guide plate 1003 so that the lower end surface of the light guide plate 1003 and the FPCA 1001 are tightly bonded via the release film.

[0077] S7. Use a sticky roller to roll the upper surface of the light guide plate 1003 to clean foreign matter on the upper end surface of the light guide plate 1003.

[0078] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A light guide plate limiting assembly fixture, characterized by: include The base (1) has an upper end surface provided with a product fixing groove (11) for placing the FPCA (1001); The cover plate (2) is flipped over and closed on the base (1), and a hinged member (3) hingedly connected to the base (1) is provided on one side, and a mounting through hole (21) communicating with the product fixing groove (11) is provided on the end surface facing away from the base (1); The product fixing groove (11) has a first placement position (111) for placing the FPCA (1001), a second placement position (112) for placing the FPCA light bar (1002) on a side of the product fixing groove (11) close to the hinge (3), and a third placement position (113) for inserting the light guide plate (1003) is provided in the product fixing groove (11) above the FPCA (1001); A protective strip (4) is provided on the end surface of the cover plate (2) facing the base (1), and a fourth placement position (114) for inserting the protective strip (4) is provided in the product fixing groove (11); The protection strip (4) is located between the hinge (3) and the light guide plate (1003), and the side of the protection strip (4) facing the third placement position (113) is protruding from the side of the FPCA light bar (1002) facing the third placement position (113) in a direction close to the protection strip (4).

2. The light guide plate limiting assembly fixture according to claim 1, characterized in that: A first gap (115) is provided between the fourth placement position (114) and the third placement position (113), and a second gap (116) is provided between the fourth placement position (114) and the second placement position (112).

3. The light guide plate limiting assembly fixture according to claim 1, characterized in that: A tolerance gap (118) is provided between the upper end surface of the base (1) and the second placement position (112) in the vertical direction, and the tolerance gap (118) ranges from 0.3 mm to 0.5 mm.

4. The light guide plate limiting assembly jig according to claim 3, characterized in that: The cover plate (2) is provided with a limiting member (5) for limiting the horizontal position of the light guide plate (1003), and a plurality of the limiting members (5) are arranged at intervals in the circumferential direction around the mounting through hole (21).

5. The light guide plate limiting assembly jig according to claim 4, characterized in that: The limiting member (5) comprises a second elastic piece (52), the second elastic piece (52) being located in the mounting through hole (21) and having one end connected to the cover plate (2), and the other end of the second elastic piece (52) being arranged obliquely downward in a direction away from the hole wall of the mounting through hole (21).

6. The light guide plate limiting assembly jig according to claim 1, characterized in that: An anti-collision gap (117) is provided between the rotation track of the protection strip (4) and the third placement position (113).

7. The light guide plate limiting assembly fixture according to claim 1, characterized in that: The two side walls of the base (1) arranged opposite to each other are each provided with a handle groove (12), the hinge (3) is located between the handle grooves (12), and the handle groove (12) passes through the upper end surface of the base (1), the lower end surface of the base (1) and is in communication with the product fixing groove (11).

8. The light guide plate limiting assembly jig according to claim 1, characterized in that: A positioning guide post (8) is provided on the cover plate (2), and the positioning guide post (8) is located on the side of the mounting through hole (21) away from the hinge (3); and a positioning slot (13) for the positioning guide post (8) to slide into is provided on the upper end surface of the base (1); A first magnet (9) is provided on the cover plate (2), and the first magnet (9) is located on the side of the mounting through hole (21) away from the hinge (3). A second magnet (10) adsorbed by the first magnet (9) is provided on the upper end surface of the base (1).

9. The light guide plate limiting assembly jig according to claim 1, characterized in that: A first handle (6) is provided on the side of the base (1) facing away from the hinge (3), and a second handle (7) is provided on the side of the cover (2) facing away from the hinge (3), wherein the first handle (6) and the second handle (7) are staggered in the horizontal direction.

10. A method for using a light guide plate position limiting assembly jig, comprising the light guide plate position limiting assembly jig according to any one of claims 1 to 9, characterized in that: The following steps are included S1. Flip the cover plate (2) upwards to keep the cover plate (2) away from the base (1), and then place the FPCA (1001) in the first placement position (111) of the product fixing groove (11) of the base (1), and the FPCA light bar (1002) is located in the second placement position (112); S2, flipping the cover plate (2) downward so that the cover plate (2) covers the base (1); S3. Assemble the light guide plate (1003), pass the light guide plate (1003) through the mounting through hole (21) and place it in the third placement position (113), and the side of the protective strip (4) facing the third placement position (113) protrudes from the side of the FPCA light strip (1002) facing the third placement position (113) in a direction close to the third placement position (113).

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