Display screen production jig

Abstract

This utility model discloses a display screen manufacturing fixture. A rear shell receiving cavity is provided on the assembly surface at the top of the fixture body, and multiple first limiting members are evenly distributed along the periphery of the rear shell receiving cavity on the assembly surface. Second limiting members, positioned on the first limiting members and close to the rear shell receiving cavity, are used to control the assembly gap between the rear shell frame and the display module. This not only improves assembly precision and consistency, reduces product yield reduction and process rework caused by poor gap control, but also effectively improves assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of display device manufacturing technology, specifically to a display screen production fixture. Background Technology

[0002] With the increasing demand for thinner and lighter mobile terminal devices and higher screen-to-body ratios, the assembly precision requirements for display screens and back frames are becoming increasingly stringent. Traditional assembly processes typically employ snap-fit ​​fixing or manual adjustment. Manual operation makes it difficult to precisely control the screen gaps, resulting in low product yield. Furthermore, manual adjustment is inefficient and inconsistent, failing to meet the demands of large-scale mass production. In addition, existing fixtures lack dynamic adaptability and cannot accommodate dimensional tolerance fluctuations between the back shell and tempered glass, further restricting production flexibility. Therefore, there is an urgent need to develop a high-precision, high-efficiency positioning fixture to solve the problems of low assembly efficiency and unstable quality caused by gap control difficulties in the current display assembly process. Utility Model Content

[0003] The display screen production fixture provided in the embodiments of this utility model aims to solve the problems of low assembly efficiency and unstable quality caused by gap control difficulties in the existing display screen assembly process.

[0004] Firstly, this utility model provides a display screen manufacturing fixture, comprising:

[0005] The fixture body has a mounting surface on the top; a rear shell receiving cavity is recessed into the fixture body from the mounting surface; a first limiting member is detachably disposed on the mounting surface, and a plurality of the first limiting members are evenly distributed along the circumference of the rear shell receiving cavity; a second limiting member is disposed on the first limiting member, and the second limiting member is disposed close to the rear shell receiving cavity, and the second limiting member is used to control the assembly gap between the rear shell frame and the display module.

[0006] In the display screen production fixture provided by this utility model, the second limiting member is detachably disposed on the first limiting member.

[0007] In the display production fixture provided by this utility model, the second limiting member has an end, which extends into the rear shell receiving cavity in the direction of the recess, and the end is used to extend into the interior of the rear shell frame to guide the assembly position of the display module.

[0008] In the display screen production fixture provided by this utility model, the end is an embedded piece, which extends along the extension direction of the connection line between the rear shell receiving cavity and the assembly surface.

[0009] In the display screen manufacturing fixture provided by this utility model, the surface of the embedded piece near the rear shell receiving cavity is a smooth plane.

[0010] In the display screen production fixture provided by this utility model, a second magnetic suction member is provided on the assembly surface, and a first magnetic suction member is provided on the first limiting member. When the first limiting member is provided on the assembly surface, the first magnetic suction member is aligned with the second magnetic suction member and attracts it.

[0011] In the display screen production fixture provided by this utility model, the assembly surface is provided with a guide groove that is recessed into the body of the fixture. The second magnetic suction member is provided at the bottom of the guide groove. The first limiting member is provided with a guide part. The guide part is provided close to the first magnetic suction member. When the first magnetic suction member and the second magnetic suction member are attracted together, the guide part is inserted into the guide groove.

[0012] The display screen manufacturing fixture provided by this utility model also includes a gripping groove, which is recessed from the assembly surface into the fixture body and connects the rear shell receiving cavity and the outer side wall of the fixture body.

[0013] The display screen production fixture provided by this utility model also includes a buffer structure. The bottom of the rear shell receiving cavity is provided with a buffer structure, which protrudes from the bottom of the rear shell receiving cavity toward the assembly surface.

[0014] The display screen production fixture provided by this utility model also includes a base, which is disposed on the bottom surface of the fixture body and is used to keep the assembly surface horizontally positioned.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] In the technical solution of this utility model, a rear shell receiving cavity is provided on the assembly surface at the top of the fixture body, and multiple first limiting members are evenly distributed along the periphery of the rear shell receiving cavity on the assembly surface. Second limiting members, provided on the first limiting members and close to the rear shell receiving cavity, are used to control the assembly gap between the rear shell frame and the display module. This not only improves the accuracy and consistency of assembly and reduces product yield reduction and process rework caused by poor gap control, but also effectively improves assembly efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A three-dimensional schematic diagram of a display screen manufacturing fixture according to an embodiment of this utility model;

[0019] Figure 2 This is a top view of the display screen manufacturing fixture according to an embodiment of the present utility model;

[0020] Figure 3 A bottom view of the display screen manufacturing fixture according to an embodiment of this utility model;

[0021] Figure 4 Right view of the display screen manufacturing fixture according to an embodiment of this utility model;

[0022] Figure 5 A front view of the display screen production fixture in use according to an embodiment of this utility model;

[0023] Figure 6 A partially enlarged view A is a three-dimensional schematic diagram of the display screen manufacturing fixture according to an embodiment of the present utility model.

[0024] Figure 7 A three-dimensional view of the main body of the display screen manufacturing fixture according to an embodiment of this utility model;

[0025] Figure 8 A three-dimensional view of the first limiting member of the display screen manufacturing fixture according to an embodiment of the present utility model;

[0026] Figure 9 This is a front view of the first limiting member of the display screen production fixture according to an embodiment of the present utility model.

[0027] Figure label explanation:

[0028] 10. Fixture body; 11. Assembly surface; 12. Rear shell cavity; 13. Second magnetic suction component; 14. Guide groove; 15. Gripping groove; 16. Buffer structure; 17. Base;

[0029] 20. First limiting member; 21. Second limiting member; 22. Embedded piece; 23. First magnetic suction member; 24. Guide part;

[0030] 30. Back cover frame;

[0031] 40. Display module. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] This utility model discloses a display screen manufacturing fixture aimed at solving the problems of low assembly efficiency and unstable quality caused by gap control difficulties in the existing display screen assembly process. (Refer to...) Figures 1 to 9 The display screen manufacturing fixture includes: a fixture body 10 with a mounting surface 11 on the top; a rear shell receiving cavity 12 recessed from the mounting surface 11 into the fixture body 10; a first limiting member 20 detachably disposed on the mounting surface 11, with multiple first limiting members 20 evenly distributed circumferentially along the rear shell receiving cavity 12; and a second limiting member 21 disposed on the first limiting member 20, with the second limiting member 21 located close to the rear shell receiving cavity 12, the second limiting member 21 being used to control the assembly gap between the rear shell frame 30 and the display module 40.

[0035] The fixture body 10 is made of a rigid material, such as engineering plastic or metal, to ensure its structural stability and durability. The top of the fixture body 10 has a mounting surface 11, which is flat and precision-machined to provide good support and positioning during assembly. The rear shell receiving cavity 12 is recessed inward on the mounting surface 11, its size and shape matching the shape of the rear shell, capable of accommodating the frame portion of the rear shell, ensuring that the rear shell does not shift or deform during assembly. To achieve precise positioning of the rear shell, multiple first limiting members 20 are evenly distributed circumferentially along the rear shell receiving cavity 12. These first limiting members 20 can be spring washers made of elastic material or adjustable limiting blocks, facilitating adjustment and fixation according to different rear shell sizes. Each first limiting member 20 can be disassembled by screws or clips, facilitating adjustment in different batches or models of production. The second limiting member 21 is located above the first limiting member 20, near the edge of the rear shell receiving cavity 12, and is used to control the assembly gap between the rear shell frame 30 and the display module 40. Specifically, the fixture body 10 is made of high-strength aluminum alloy or bakelite and has a precision-ground assembly surface 11 on the top to ensure a certain degree of flatness to meet the requirements of high-precision assembly. The rear shell receiving cavity 12 is formed inside the fixture body 10 by CNC precision machining. Its outline dimensions match the rear shell product to be assembled, and its depth is slightly greater than the thickness of the rear shell to ensure that the rear shell can be completely embedded in the cavity and that its top edge is flush with the assembly surface 11. The first limiting member 20 is detachably fixed to the assembly surface 11 by guide pins and fastening bolts. Four to eight of them are evenly arranged around the circumference of the rear shell receiving cavity 12, and the specific number can be adjusted according to the product size.

[0036] In one embodiment, reference is made to Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 8 and Figure 9The second limiting member 21 is detachably mounted on the first limiting member 20. To achieve this detachable mounting design, screws, nuts, clips, or pins are typically used to secure the second limiting member 21 to the first limiting member 20 while allowing for easy disassembly. Specifically, the second limiting member 21 is fixed to the side of the first limiting member 20 near the rear housing cavity 12 by screws. A standard threaded hole is provided inside the first limiting member 20, which aligns with the through hole on the second limiting member 21, and is secured with a standard countersunk screw. The second limiting member 21 can be replaced depending on the display model. A positioning pin hole is provided at its connection point with the first limiting member 20 to ensure accurate installation. The second limiting member 21 is made of SUS304 stainless steel, with thicknesses of 0.1mm, 0.3mm, and 0.5mm available to accommodate the assembly clearance requirements of different display modules 40. When the clearance needs to be adjusted, simply loosen the fixing screws and replace them with the second limiting piece 21 of the appropriate thickness. This detachable design not only improves the versatility of the fixture but also facilitates maintenance and ensures long-term precision stability.

[0037] In one embodiment, reference is made to Figure 6 , Figure 8 and Figure 9 The second limiting member 21 has an end that extends into the recessed area of ​​the rear housing cavity 12. This end is used to guide the display module 40 into the rear housing frame 30 during assembly. The end of the second limiting member 21 is designed to extend along the recessed area of ​​the rear housing cavity 12, effectively entering the internal area of ​​the rear housing frame 30 and guiding the display module 40 to the correct assembly position. This end can be a slender protrusion or guide rod structure to ensure that the display module 40 smoothly enters the rear housing frame 30 along a predetermined path during assembly, thus avoiding displacement or misalignment. Specifically, the end of the second limiting member 21 extends a certain length into the fixture body 10, controlled within the range of 3-5 mm, to avoid squeezing the rear housing frame 30 and affecting positioning accuracy. Considering durability requirements, the second limiting member 21 is integrally formed from SUS304 stainless steel and undergoes a special grinding process to achieve a hardness of HRC42-45. In actual operation, after the second limiting member 21 is installed, its extended end will automatically extend into the rear shell receiving cavity to a depth of 123-5mm. At this time, the display module 40 can accurately slide into the predetermined assembly position along the end guide surface during the pressing assembly process, ensuring a repeatability of ±0.05mm. To accommodate different product models, the end length can also be designed as an adjustable structure, with an adjustment range of 2-10mm.

[0038] Furthermore, referring to Figure 6 , Figure 8 and Figure 9 The end of the second limiting member 21 is an insert piece 22, which extends along the connecting line between the rear housing cavity 12 and the mounting surface 11. The insert piece 22 has a slender, plate-like structure, facilitating the assembly personnel to accurately guide the display module 40 to the predetermined position of the rear housing frame 30 by means of machinery or manual pressing or insertion. Specifically, the second limiting member 21 is stamped from SUS304 stainless steel, with an L-shaped cross-section, including a horizontal connecting piece and a vertical insert piece 22. The horizontal connecting piece is fixed to the body of the second limiting member 21 by two M2 countersunk screws, while the vertical insert piece 22 extends precisely along the connecting line between the rear housing cavity 12 and the mounting surface 11. In actual operation, when the display module 40 is pressed down, the vertical part of the embedded piece 22 will first contact the inner side of the back shell frame 30, and its own elastic deformation can automatically compensate for the positional deviation during the assembly process. This design, which extends in the direction of the connection line between the back shell receiving cavity 12 and the assembly surface 11, enables the embedded piece 22 to accurately guide the display module 40 to assemble along a preset trajectory, which is particularly suitable for the high-precision assembly requirements of ultra-narrow bezel displays.

[0039] Furthermore, referring to Figure 6 , Figure 8 and Figure 9 The surface of the insert 22 closest to the rear housing cavity 12 is a smooth plane. This surface is precision polished to ensure excellent smoothness and flatness. The smooth plane structure effectively reduces friction with the edge of the display module 40 during assembly, avoiding misalignment or assembly obstruction caused by surface roughness or unevenness. This smooth plane also reduces wear on the insert 22, thereby enhancing its durability and reusability. Specifically, the contact surface of the insert 22 facing the rear housing cavity 12 is mirror-polished, with a surface roughness controlled below Ra0.2, forming a functional smooth plane. This plane is processed using a segmented process, including three steps: rough grinding, fine grinding, and electrolytic polishing, ensuring the surface is free of obvious machining marks and microscopic defects.

[0040] To further improve the smoothness of the assembly process, the smooth surface is coated with a 0.5μm thick diamond-like carbon (DLC) film, with the coefficient of friction controlled between 0.1 and 0.15. In actual assembly operations, when the display module 40 moves along the guide surface of the insert 22, this specially treated smooth surface significantly reduces sliding resistance, preventing scratches or particulate contamination. Simultaneously, the coating hardness reaches HV2000 or higher, ensuring wear resistance under high-frequency use. Statistical data from actual use show that after 1000 consecutive cycles, the surface roughness of the insert 22 remains below Ra0.25, fully meeting the process requirements of precision assembly.

[0041] In one embodiment, reference is made to Figure 7 , Figure 8 and Figure 9 The assembly surface 11 is provided with a second magnetic attractor 13, and the first limiting member 20 is provided with a first magnetic attractor 23. When the first limiting member 20 is located on the assembly surface 11, the first magnetic attractor 23 aligns with and attracts the second magnetic attractor 13. The assembly surface 11 is provided with a second magnetic attractor 13, and correspondingly, each first limiting member 20 is provided with a first magnetic attractor 23. The two magnetic attractors are aligned through magnetic attraction, ensuring that the first limiting member 20 can be accurately and firmly positioned on the assembly surface 11 during assembly. These magnetic attractors use permanent magnetic materials such as neodymium iron boron, which have high magnetic flux density and good magnetic fixing ability. Specifically, the first magnetic attractor 23 is placed at the bottom of the first limiting member 20, forming a structural component with magnetic poles. When the first limiting member 20 is placed on the assembly surface 11, it can quickly align and attract the second magnetic attractor 13. This allows the first limiting member 20 to automatically align during assembly, eliminating tedious manual adjustment steps and significantly improving assembly efficiency. The magnetic force during the connection process should be moderate, ensuring stable positioning while allowing operators to quickly remove or adjust the connection when needed.

[0042] Furthermore, referring to Figure 6 , Figure 8 and Figure 9The assembly surface 11 is provided with a guide groove 14 recessed into the fixture body 10. The second magnetic suction member 13 is located at the bottom of the guide groove 14. The first limiting member 20 is provided with a guide portion 24, which is located close to the first magnetic suction member 23. When the first magnetic suction member 23 and the second magnetic suction member 13 are attracted, the guide portion 24 is inserted into the guide groove 14. The function of the guide groove 14 is to guide and position the first limiting member 20 and related assembly components, ensuring that they are attracted along a predetermined path and maintain the correct position during assembly. The bottom of the guide groove 14 is provided with a second magnetic suction member 13, which uses magnetic attraction to achieve quick alignment and fixation with the first magnetic suction member 23 on the first limiting member 20. In addition, the first limiting member 20 is provided with a guide portion 24, which is located close to multiple 45° guide slopes arranged around the first magnetic suction member 23. In the initial stage of magnetic attraction, the slopes guide the first limiting member 20 to automatically correct angular deviations. When the first magnetic attractor 23 and the second magnetic attractor 13 are attracted together, the guide part 24 will sink into the guide groove 14 and abut against the side wall of the guide groove 14, so that the first limiting member 20 and the fixture body 10 form a stable fixed relationship.

[0043] In one embodiment, reference is made to Figures 1 to 3 and Figure 7 The display screen production fixture of this utility model also includes a gripping groove 15, which is recessed from the assembly surface 11 into the fixture body. The gripping groove 15 connects the rear shell receiving cavity 12 and the outer wall of the fixture body. The gripping groove 15 extends along the assembly surface 11 into the recessed area inside the fixture body, forming a channel for clamping or extraction. The bottom of the gripping groove 15 is connected to the rear shell receiving cavity 12 and penetrates the outer wall of the fixture, allowing operators to easily perform gripping, handling, or positioning operations through the groove. The opening structure of the gripping groove 15 is designed as a rectangular notch adapted to the insertion of operating tools or clamps, with an arc-shaped bottom surface, ensuring stable gripping of the fixture during assembly or disassembly. For manual assembly, operators can quickly and conveniently remove or place the fixture from its storage location or assembly line without affecting the overall structure of the fixture, greatly improving production efficiency. For automated mechanical assembly, the gripping slot 15 can also be used in conjunction with a dedicated clamping device or robotic arm to automatically load and unload the display screens to be assembled, further improving the level of automation in assembly.

[0044] In one embodiment, reference is made to Figure 7The display screen manufacturing fixture of this utility model also includes a buffer structure 16. The bottom of the rear shell receiving cavity 12 is provided with the buffer structure 16, which protrudes from the bottom of the rear shell receiving cavity 12 towards the assembly surface 11. The buffer structure 16 is designed as a protruding structure located at the bottom of the rear shell receiving cavity 12, possessing a certain degree of elasticity, and can effectively absorb impacts and vibrations during assembly and disassembly, ensuring the integrity of the product and the fixture. This buffer structure 16, by protruding from the bottom of the rear shell receiving cavity 12 towards the assembly surface 11, forms a certain height difference or buffer layer, which can be made of rubber, silicone, or materials with elastic recovery properties. Its design can be ring-shaped, block-shaped, or strip-shaped, optimized according to the size and performance requirements of the rear shell receiving cavity 12. Its main function is that during assembly, the buffer structure 16 can reduce the impact of pressure on the display module 40 and the rear shell frame 30, reduce deformation or damage caused by mechanical pressure, improve the smoothness and stability of assembly, facilitate precise positioning, and improve the appearance quality of the product. During assembly, after aligning the display module 40 or the back cover with the fixture, the buffer structure 16 will evenly distribute the applied load through elastic deformation, reducing damage to the equipment and products.

[0045] In one embodiment, reference is made to Figure 3 The display screen production fixture of this utility model also includes a base 17, which is disposed on the bottom surface of the fixture body 10. The base 17 is used to keep the assembly surface 11 horizontally positioned. The base 17 is firmly disposed on the bottom surface of the fixture body 10 and is fixed by means of screws, clips, or adhesives to ensure that it is not easily displaced or deformed. The design of the base 17 should ensure that the entire fixture remains horizontal during the assembly process, thereby ensuring that the assembly surface 11 also remains horizontally positioned and avoiding abnormal gaps or deviations caused by tilting. In addition, in order to achieve positioning accuracy, the base 17 is usually equipped with adjusting feet or leveling pads, which can be finely adjusted according to actual needs to ensure that the fixture remains horizontal in different workbenches or assembly environments. The base 17 has sufficient size to provide a stable support area to avoid shaking or displacement caused by vibration or external impact. For the display screen production fixture of this utility model, the area of ​​the base 17 is not less than 60% of its bottom surface area.

[0046] In one embodiment, to accommodate different product models, the first limiting member 20 may also be equipped with a lateral adjustment device with a dovetail groove structure (not shown in the figure). The dovetail groove structure allows the second limiting member 21 to be finely adjusted radially by a certain distance; at the same time, all fastening connections are treated with anti-loosening thread-locking adhesive to ensure stability during long-term use. To further fix the position of the rear shell frame 30, a vacuum adsorption pipeline can be added to the side of the fixture body 10, which, through connection to the micropore array at the bottom of the rear shell receiving cavity 12, provides an auxiliary adsorption and fixing function during assembly, preventing the rear shell from shifting. Through the above modular design and precision mechanical constraints, efficient and high-precision operation in the display assembly process is achieved.

[0047] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A display screen manufacturing fixture, characterized in that, include: The main body of the fixture has an assembly surface on top; The rear housing cavity is recessed into the body of the fixture from the assembly surface; The first limiting member is detachably disposed on the assembly surface, and a plurality of the first limiting members are evenly distributed along the circumference of the rear shell receiving cavity; The second limiting member is disposed on the first limiting member and is located near the rear shell receiving cavity. The second limiting member is used to control the assembly gap between the rear shell frame and the display module.

2. The display screen manufacturing fixture according to claim 1, characterized in that, The second limiting member is detachably provided on the first limiting member.

3. The display screen manufacturing fixture according to claim 2, characterized in that, The second limiting member has an end, which extends into the rear shell receiving cavity in the direction of the recess, and the end is used to extend into the interior of the rear shell frame to guide the assembly position of the display module.

4. The display screen manufacturing fixture according to claim 3, characterized in that, The end portion is an insert piece, which extends along the extension direction of the connection line between the rear housing cavity and the mounting surface.

5. The display screen manufacturing fixture according to claim 4, characterized in that, The surface of the insert near the rear housing cavity is a smooth plane.

6. The display screen manufacturing fixture according to claim 1, characterized in that, The assembly surface is provided with a second magnetic attractor, and the first limiting member is provided with a first magnetic attractor. When the first limiting member is located on the assembly surface, the first magnetic attractor is aligned with the second magnetic attractor and attracts it.

7. The display screen manufacturing fixture according to claim 6, characterized in that, The mounting surface is provided with a guide groove that is recessed into the body of the fixture. The second magnetic suction member is located at the bottom of the guide groove. The first limiting member is provided with a guide portion. The guide portion is located close to the first magnetic suction member. When the first magnetic suction member and the second magnetic suction member are attracted together, the guide portion is inserted into the guide groove.

8. The display screen manufacturing fixture according to claim 1, characterized in that, It also includes a gripping groove, which is recessed from the assembly surface into the fixture body and connects the rear shell receiving cavity and the outer side wall of the fixture body.

9. The display screen manufacturing fixture according to claim 1, characterized in that, It also includes a buffer structure, the bottom of which is provided with a buffer structure, which protrudes from the bottom of the rear shell cavity toward the mounting surface.

10. The display screen manufacturing fixture according to claim 1, characterized in that, It also includes a base, which is disposed on the bottom surface of the fixture body, and the base is used to keep the assembly surface horizontally positioned.

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