A pressing head jig for assembling a mobile phone backlight

Abstract

This utility model relates to the field of smartphone backlight assembly technology, and more particularly to a pressure head fixture for assembling smartphone backlights. It includes a fixing component and a pressure head component. The fixing component includes a fixing steel plate, a first milled groove, and screw holes. Two symmetrically distributed first milled grooves are formed on the surface of the fixing steel plate. Screw holes are formed at one end of the fixing steel plate and are symmetrically distributed along the middle of the fixing steel plate. The pressure head component includes a pressure head steel plate, a second milled groove, and a protective layer. This pressure head fixture achieves high adjustability by providing symmetrically distributed milled grooves and screw holes on the fixing component and the pressure head component. It can adapt to the needs of different products and suction block fixtures. During the bonding process of FPC and LGP components with the glue-on reflector component, the pressure head steel plate applies pressure to the component head to ensure a firm bond and effectively prevent component displacement, thereby significantly improving bonding accuracy and the yield rate of finished products.

Description

Technical Field

[0001] This utility model relates to the field of smartphone backlight assembly technology, and in particular to a pressure head fixture for assembling smartphone backlights. Background Technology

[0002] With the rapid development of smartphones, consumers have put forward higher requirements for the display effect of mobile phone screens, such as ultra-thin, high brightness, and high contrast. As an important component of mobile phone screens, the assembly quality of backlight directly affects the display effect and user experience. Traditional backlights are mainly composed of reflective sheets, upper brightness enhancement sheets, lower brightness enhancement sheets, light guide plates (LGP), flexible printed circuit boards (FPC), diffuser sheets, and other components. During the assembly process, FPC and LGP components need to be bonded to the adhesive and reflective sheet components, which requires extremely high process precision.

[0003] In traditional processes, FPC+LGP modules are typically directly dropped and bonded to the glue-iron+reflector module using a suction block device. However, this process has significant drawbacks: due to the lack of effective reinforcement measures, the modules are prone to displacement after bonding due to high-speed operation of the equipment or external vibrations. This displacement not only leads to poor bonding results but may also cause uneven light emission, insufficient brightness, and other defects. In severe cases, it can even cause a significant drop in product qualification rate. More importantly, minor bonding defects may be difficult to detect during factory inspection, resulting in defective products entering the market and impacting brand reputation and market competitiveness.

[0004] To address these issues, the industry has attempted several improvements. For example, optimizing the design of the suction blocks or adjusting bonding parameters can reduce the risk of displacement. However, these methods often have limited effectiveness and cannot fundamentally solve the problem of weak component bonding. Furthermore, while some solutions can improve bonding strength, excessive pressure may cause LED chips to crack or the light guide plate (LGP) to be damaged, thus increasing new quality risks. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a pressure head fixture for assembling mobile phone backlights.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a pressure head fixture for assembling a mobile phone backlight, comprising a fixing component and a pressure head component, wherein the fixing component comprises a fixing steel plate, a milled groove, and screw holes, wherein two symmetrically distributed milled grooves are provided on the surface of the fixing steel plate, and screw holes are provided at one end of the fixing steel plate, wherein the screw holes are symmetrically distributed along the middle position of the fixing steel plate.

[0007] The pressure head assembly includes a pressure head steel plate, a second milled groove, and a protective layer. The pressure head steel plate is attached to the surface of a fixed steel plate on one side. Two symmetrically distributed second milled grooves are formed on the surface of the pressure head steel plate. The position of any second milled groove corresponds to the position of a screw hole, and the second milled groove is connected to the screw hole. The end of the pressure head steel plate is covered with a protective layer.

[0008] The protective layer is divided into a wear-resistant layer and a buffer layer. The buffer layer is wrapped around the end of the pressure head steel plate, and the wear-resistant layer is coated on the surface of the buffer layer.

[0009] Preferably, the wear-resistant layer is a polyvinyl chloride coating with a thickness of 0.1-0.3 mm.

[0010] Preferably, the buffer layer is a polyurethane film material with a thickness not exceeding 1 mm.

[0011] Preferably, the fixing steel plate and the pressure head steel plate are fastened together by screws passing through the milled groove and screw holes.

[0012] Preferably, both ends of the inner wall of the milled groove are semi-circular.

[0013] Preferably, the second milling groove has the same shape as the first milling groove, both being strip structures.

[0014] Preferably, both ends of the inner wall of the second milled groove are right-angled structures.

[0015] The design scheme proposed in this utility model has the following beneficial effects in application:

[0016] 1. The pressure head fixture in this solution achieves height adjustability by setting symmetrically distributed milled grooves and screw holes on the fixed component and the pressure head component. It can adapt to the needs of different products and suction block fixtures. During the bonding process of FPC and LGP components with glue iron and reflective components, the pressure head steel plate applies pressure to the component head to ensure firm bonding and effectively prevent component displacement, thereby significantly improving bonding accuracy and the pass rate of finished products.

[0017] 2. As described in point 1, the lower contact area of ​​the pressure head steel plate is wrapped with foam material to form a buffer protective layer, which can play a buffering role during the pressure application process to avoid LED cracking or LGP damage. In addition, the protective layer consists of a wear-resistant layer and a buffer layer. The wear-resistant layer is a polyvinyl chloride coating, which has good wear resistance and corrosion resistance. The buffer layer is a polyurethane film material, which further enhances the buffering effect and extends the service life of the fixture.

[0018] 3. As described in 2, the fixed steel plate and the pressure head steel plate are fastened by screws through the milled groove and screw holes. The height can be flexibly adjusted by adjusting the screws to adapt to the fitting requirements of components of different thicknesses. The inner wall of the milled groove is designed as a semi-circular or right-angled structure. The strip structure provides sufficient adjustment space, making the fixture more flexible and efficient in practical applications. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the combination of the fixing steel plate and the pressure head steel plate of this utility model;

[0020] Figure 2 This is a front view of the fixing steel plate of this utility model;

[0021] Figure 3 This is a front view of the pressure head steel plate of this utility model;

[0022] Figure 4 This is a side view of the fixing steel plate of this utility model;

[0023] Figure 5 This is a side view of the pressure head steel plate of this utility model;

[0024] Figure 6 This is a schematic diagram of the protective layer composition of this utility model.

[0025] In the diagram: 1. Fixing component; 10. Fixing steel plate; 11. Milling groove one; 12. Screw hole; 2. Pressure head assembly; 20. Pressure head steel plate; 21. Milling groove two; 22. Protective layer; 2201. Wear-resistant layer; 2202. Buffer layer. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Example 1

[0028] Reference Figures 1-2 A pressure head fixture for assembling a mobile phone backlight includes a fixing component 1 and a pressure head component 2. The fixing component 1 includes a fixing steel plate 10, milled grooves 11, and screw holes 12. Two symmetrically distributed milled grooves 11 are opened on the surface of the fixing steel plate 10. Screw holes 12 are opened at one end of the fixing steel plate 10 and are symmetrically distributed along the middle position of the fixing steel plate 10.

[0029] The pressure head assembly 2 includes a pressure head steel plate 20, a second milled groove 21, and a protective layer 22. The pressure head steel plate 20 is attached to the surface of the fixed steel plate 10 on one side. Two symmetrically distributed second milled grooves 21 are opened on the surface of the pressure head steel plate 20. The position of any one of the second milled grooves 21 corresponds to the position of the corresponding screw hole 12, and the second milled groove 21 is connected to the screw hole 12. The end of the pressure head steel plate 20 is covered with the protective layer 22.

[0030] The milled groove 21, in conjunction with the screw hole 12, is used for fixing and adjusting the height to meet the needs of different products and suction block fixtures. During the bonding process of FPC and LGP components, as well as the bonding process with the glue iron and reflective components, the pressure head steel plate 20 applies pressure to the head of the component to ensure a firm bond and prevent the component from shifting. In actual use, the lower contact area of ​​the pressure head steel plate 20 is also wrapped with foam material to buffer the pressure and prevent the LED from cracking or the LGP from being damaged.

[0031] The protective layer 22 is divided into a wear-resistant layer 2201 and a buffer layer 2202. The buffer layer 2202 is wrapped around the end of the pressure head steel plate 20, and the wear-resistant layer 2201 is coated on the surface of the buffer layer 2202. The protective layer 22 formed by the wear-resistant layer 2201 and the buffer layer 2202 can provide long-term protection for the lower end of the pressure head steel plate 20 itself.

[0032] The wear-resistant layer 2201 is a polyvinyl chloride coating with a thickness of 0.1-0.3mm, which has good wear resistance and corrosion resistance.

[0033] Among them, the buffer layer 2202 is a polyurethane membrane material with a thickness of no more than 1mm, which can buffer and protect the lower end face during the force application process.

[0034] The fixed steel plate 10 and the pressure head steel plate 20 are fastened together by screws passing through the milled groove 21 and screw holes 12. The height can be adjusted by adjusting the screws to meet the bonding requirements of components of different thicknesses.

[0035] The inner walls of the milled groove 11 are both semi-circular at both ends.

[0036] Among them, the milling groove 21 and the milling groove 11 have the same shape, both being strip structures. The strip structure ensures that there is sufficient adjustment space during installation.

[0037] Among them, both ends of the inner wall of the milled groove 21 are right-angle structures.

[0038] In practice

[0039] In this solution, the fixing component 1 is connected to the pressure head component 2 through the milled groove 11 and screw hole 12 on the fixing steel plate 10. The pressure head steel plate 20 is fastened with screws through the cooperation of the milled groove 21 and screw hole 12. The communication design between the milled groove 21 and screw hole 12 allows the screw to move in the groove, thereby realizing the flexible adjustment of the height of the pressure head steel plate 20. This structure can adapt to the needs of different products and suction block fixtures, ensuring that the pressure head fixture can be accurately adjusted according to the component thickness in actual applications. The strip milled groove design of the fixing steel plate 10 and the pressure head steel plate 20 provides sufficient adjustment space, while the different shapes at both ends of the milled groove, including semicircles or right angles, further optimize the stability and flexibility of the installation.

[0040] During the bonding process between FPC and LGP modules and the adhesive-coated reflector module, the pressure head steel plate 20 applies pressure to the module head to ensure a firm bond and prevent displacement. The lower contact area of ​​the pressure head steel plate 20 is wrapped with foam material as a buffer layer 2202, which can effectively absorb and disperse pressure to prevent LED cracking or LGP damage. The protective layer 22 consists of a wear-resistant layer 2201 and a buffer layer 2202, which has both wear resistance and buffering performance. The thickness of the polyvinyl chloride coating is 0.1-0.3mm, providing long-term corrosion protection and wear resistance. The thickness of the polyurethane film material does not exceed 1mm, ensuring that a flexible buffer is formed on the module surface during the application of force, thereby improving the bonding accuracy while protecting the integrity of the module.

[0041] The protective layer 22 provides comprehensive protection for the end of the pressure head steel plate 20 through the synergistic effect of the wear-resistant layer 2201 and the buffer layer 2202. The wear-resistant layer 2201 is coated on the surface of the buffer layer 2202. Its polyvinyl chloride material and 0.1-0.3mm thickness design can resist friction and corrosion during long-term use. The buffer layer 2202 is made of polyurethane film material with a thickness of no more than 1mm. It can provide elastic buffer when the pressure head steel plate 20 is subjected to force, avoiding component damage caused by rigid contact. This double-layer structure not only extends the service life of the fixture, but also improves the stability and safety of the bonding process through the buffer function, ensuring the finished product qualification rate.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pressure head fixture for assembling a mobile phone backlight, comprising a fixing component (1) and a pressure head assembly (2), characterized in that: The fixing component (1) includes a fixing steel plate (10), a milled groove (11), and screw holes (12). The surface of the fixing steel plate (10) has two symmetrically distributed milled grooves (11). One end of the fixing steel plate (10) has screw holes (12). The screw holes (12) are symmetrically distributed along the middle position of the fixing steel plate (10). The pressure head assembly (2) includes a pressure head steel plate (20), a second milled groove (21), and a protective layer (22). The pressure head steel plate (20) is attached to the surface of the fixed steel plate (10) on one side. Two symmetrically distributed second milled grooves (21) are opened on the surface of the pressure head steel plate (20). The position of any one of the second milled grooves (21) corresponds to the position of the corresponding screw hole (12), and the second milled groove (21) is connected to the screw hole (12). The end of the pressure head steel plate (20) is covered with a protective layer (22). The protective layer (22) is divided into a wear-resistant layer (2201) and a buffer layer (2202). The buffer layer (2202) is wrapped around the end of the pressure head steel plate (20), and the wear-resistant layer (2201) is coated on the surface of the buffer layer (2202).

2. The pressure head fixture for assembling a mobile phone backlight according to claim 1, characterized in that: The wear-resistant layer (2201) is a polyvinyl chloride coating with a thickness of 0.1-0.3 mm.

3. The pressure head fixture for assembling a mobile phone backlight according to claim 1, characterized in that: The buffer layer (2202) is a polyurethane film material with a thickness of no more than 1 mm.

4. The pressure head fixture for assembling a mobile phone backlight according to claim 1, characterized in that: The fixed steel plate (10) and the pressure head steel plate (20) are fastened together by screws through the milled groove (21) and screw holes (12).

5. A pressure head fixture for assembling a mobile phone backlight according to claim 1, characterized in that: Both ends of the inner wall of the milled groove (11) are semi-circular.

6. A pressure head fixture for assembling a mobile phone backlight according to claim 1, characterized in that: The milled groove 2 (21) has the same shape as the milled groove 1 (11), both being strip structures.

7. A pressure head fixture for assembling a mobile phone backlight according to claim 1, characterized in that: Both ends of the inner wall of the milled groove 2 (21) are right-angle structures.

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