Mobile phone display screen wire arrangement structure

Abstract

The application provides a mobile phone display screen wire arrangement structure, which is characterized in that a sinking groove is arranged on the mounting plate, and the flexible connecting wire is formed with a first attaching surface, a second attaching surface and a third attaching surface in sequence, and the second attaching surface is at least partially embedded in the thickness of the mounting plate, so that the positioning of the flexible connecting wire is realized to avoid displacement, the space occupation is reduced to adapt to the light and thin demand of the whole machine, the stress at the bending part is dispersed through the stepped attaching layout, the structural strength and the connection stability of the wire are improved, and the reliability of the signal transmission of the mobile phone display screen is ensured.

Description

Technical Field

[0001] This application relates to the field of displays, and more particularly to the cable structure of mobile phone displays. Background Technology

[0002] With the rapid development of smartphone technology, the display screen, as a core component of human-computer interaction, has become a key indicator of product competitiveness due to its thinness, high screen-to-body ratio, and display performance. To achieve these goals, the internal structure of mobile phones is becoming increasingly compact, especially the connection structure between the display screen and functional modules such as the motherboard and driver board, which places higher demands on the overall space utilization and signal transmission stability.

[0003] Currently, mobile phone displays and internal circuits are mostly connected via flexible ribbon cables, with the two ends connected to the display side and the motherboard side circuit board, respectively. When the two circuit boards are adjacent and misaligned, the existing technology uses flexible ribbon cables to directly cross the gap, with part of the cable attached to the mounting plate and part of it naturally bending to adapt to the misalignment. However, this structure has drawbacks: it lacks a positioning structure, making the ribbon cable prone to displacement and affecting connection stability; the exposed bends not only occupy space, hindering thinner designs, but also make it prone to breakage due to stress concentration; the attachment area is limited and there is no stepped transition, making it difficult to simultaneously ensure connection reliability and the strength of the ribbon cable itself.

[0004] Therefore, there is a need to provide a mobile phone display cable structure to solve the problems of easy displacement and large space occupation of flexible connection cables in the prior art when connecting adjacent and misaligned circuit boards. Utility Model Content

[0005] In view of this, it is necessary to provide a mobile phone display cable structure to solve the above problems.

[0006] Embodiments of this application provide a mobile phone display screen ribbon cable structure, including: The mounting plate has a recessed groove. A first circuit board is disposed on the mounting plate and is arranged adjacent to the sinking groove; The second circuit board is adjacent to and offset from the first circuit board on the mounting plate; A flexible connecting cable, one end of which is connected to the first circuit board and the other end of which is connected to the second circuit board; The flexible connecting cable has a first attachment surface, a second attachment surface, and a third attachment surface that are sequentially and arranged in a stepped manner. The first attachment surface is disposed on the first circuit board, the second attachment surface is disposed on the bottom of the sinking groove, and the second attachment surface is at least partially embedded in the thickness of the mounting plate. The third attachment surface is disposed on the second circuit board.

[0007] In at least one embodiment of this application, the cross-sectional shape of the sinking trough is "L" shaped, and the sinking trough includes a first straight segment extending along the edge of the first circuit board and a second straight segment extending toward the second circuit board; The flexible connection cable includes a first smooth portion and a second smooth portion, which are continuously connected to form the second attachment surface. The first smooth portion is disposed on the first straight segment, and the second smooth portion is disposed on the second straight segment.

[0008] In at least one embodiment of this application, the flexible connecting cable further has a first bent portion and a second bent portion, the first bent portion connecting one end of the first attachment surface and one end of the second attachment surface, and the second bent portion connecting the other end of the second attachment surface and a third attachment surface.

[0009] In at least one embodiment of this application, a first embedding opening and a second embedding opening are respectively provided at the junction of the sinking groove and the surface of the mounting plate. The first embedding opening is located between the first straight segment and the surface of the mounting plate, and the second embedding opening is located between the second straight segment and the surface of the mounting plate. The first curved portion is located at the first embedding opening, and the second curved portion is located at the second embedding opening.

[0010] In at least one embodiment of this application, the width of the sinking trough is denoted as 'a', and the width of the flexible connecting cable is denoted as 'b', satisfying the following relationship: 1.1b≤a≤1.6b.

[0011] In at least one embodiment of this application, the first attachment surface is bonded and fixed to the first circuit board, and the first attachment surface is provided with conductive solder joints, which are soldered one-to-one with the solder pads of the first circuit board.

[0012] In at least one embodiment of this application, the first circuit board is arranged longitudinally along the mounting plate, and the second circuit board is arranged laterally along the mounting plate.

[0013] In at least one embodiment of this application, the third attachment surface is provided with a metal plug terminal, and the second circuit board is provided with a corresponding plug slot. The metal plug terminal is inserted into the plug slot and fixed by solder.

[0014] In at least one embodiment of this application, the mounting plate is integrally injection molded from a plastic alloy material.

[0015] In at least one embodiment of this application, the outer surface of the flexible connecting cable is wrapped with protective tape.

[0016] The mobile phone display cable structure described above achieves positioning of the flexible connection cable to avoid displacement by setting a recessed groove on the mounting plate and forming a first attachment surface, a second attachment surface, and a third attachment surface in sequence, with the second attachment surface at least partially embedded within the thickness of the mounting plate. This reduces space occupation to meet the requirements of a thinner and lighter overall device. At the same time, the stepped attachment layout disperses stress at the bending points, improving the structural strength and connection stability of the cable and ensuring the reliability of signal transmission for the mobile phone display. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assembly state structure of the mobile phone display cable structure in the embodiments of this application; Figure 2 This is a structural diagram showing the positional relationship between the mounting plate, the recessed groove, and the two circuit boards. Figure 3 This is a structural diagram of a flexible connector cable; Figure 4 This is a schematic diagram of the cross-section of a flexible connection cable.

[0018] Explanation of main component symbols 100. Mobile phone display screen ribbon cable structure; 10. Mounting plate; 11. Recessed groove; 111. First straight segment; 112. Second straight segment; 12. First insertion port; 13. Second insertion port; 20. First circuit board; 21. Solder pad; 30. Second circuit board; 31. Insertion groove; 40. Flexible connection ribbon cable; 41. First attachment surface; 411. Conductive solder joint; 42. Second attachment surface; 421. First smooth part; 422. Second smooth part; 43. Third attachment surface; 431. Metal insertion terminal; 44. First bending part; 45. Second bending part; 46. Protective tape. Detailed Implementation

[0019] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0020] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0021] Embodiments of this application provide a mobile phone display screen ribbon cable structure, including: The mounting plate has a recessed groove. A first circuit board is disposed on the mounting plate and is arranged adjacent to the sinking groove; The second circuit board is adjacent to and offset from the first circuit board on the mounting plate; A flexible connecting cable, one end of which is connected to the first circuit board and the other end of which is connected to the second circuit board; The flexible connecting cable has a first attachment surface, a second attachment surface, and a third attachment surface that are sequentially and arranged in a stepped manner. The first attachment surface is disposed on the first circuit board, the second attachment surface is disposed on the bottom of the sinking groove, and the second attachment surface is at least partially embedded in the thickness of the mounting plate. The third attachment surface is disposed on the second circuit board.

[0022] The mobile phone display cable structure described above achieves positioning of the flexible connection cable to avoid displacement by setting a recessed groove on the mounting plate and forming a first attachment surface, a second attachment surface, and a third attachment surface in sequence, with the second attachment surface at least partially embedded within the thickness of the mounting plate. This reduces space occupation to meet the requirements of a thinner and lighter overall device. At the same time, the stepped attachment layout disperses stress at the bending points, improving the structural strength and connection stability of the cable and ensuring the reliability of signal transmission for the mobile phone display.

[0023] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0024] according to Figures 1-4 This application provides a mobile phone display screen ribbon cable structure 100, including: a mounting plate 10, a first circuit board 20, a second circuit board 30 and a flexible connection ribbon cable 40.

[0025] The mounting plate 10 has a recessed groove 11. A first circuit board 20 is disposed on the mounting plate 10 and adjacent to the recessed groove 11. A second circuit board 30 is disposed on the mounting plate 10 adjacent to and offset from the first circuit board 20. A flexible connecting cable 40 is connected at one end to the first circuit board 20 and at the other end to the second circuit board 30.

[0026] The flexible connecting cable 40 has a first attachment surface 41, a second attachment surface 42 and a third attachment surface 43 that are sequentially and in a stepped distribution. The first attachment surface 41 is disposed on the first circuit board 20, the second attachment surface 42 is disposed at the bottom of the recessed groove 11 and is at least partially embedded in the thickness of the mounting plate 10, and the third attachment surface 43 is disposed on the second circuit board 30.

[0027] Specifically, the mounting plate 10 is a substrate for supporting the circuit board and the flexible connecting cable 40. The mounting plate 10 has a recessed groove 11 along the thickness direction, and the bottom surface of the recessed groove 11 forms a stepped surface with the ungrooved area of ​​the mounting plate 10. The depth of the recessed groove 11 is preferably 30% to 60% of the total thickness of the mounting plate 10, so as to provide an embedding space for the second attachment surface 42 of the flexible connecting cable 40 while ensuring structural strength.

[0028] The first circuit board 20 and the second circuit board 30 are mounted coplanarly on the mounting plate 10. The first circuit board 20 is arranged close to the wall of the recessed groove 11, and the second circuit board 30 is offset relative to the first circuit board 20 along the plane of the mounting plate 10, thereby obtaining a smooth stepped wiring transition path. It should be noted that the installation area of ​​the flexible connecting cable 40 is the installation area of ​​the battery component.

[0029] The first attachment surface 41 is laid flat and fixed to the upper surface of the first circuit board 20; the second attachment surface 42 crosses the groove between the first circuit board 20 and the recess 11, and is attached to the bottom surface of the recess 11, with at least a portion of the second attachment surface 42 embedded in the recess formed by the mounting plate 10; the third attachment surface 43 ascends from the bottom of the recess 11 along a stepped path and is attached to the upper surface of the second circuit board 30. Preferably, the depth of the recess 11 is matched with the relative height of the two circuit boards on the mounting plate 10 and the thickness of the substrate of the flexible connecting cable 40, so that the zigzag contour formed between the first attachment surface 41, the second attachment surface 42, and the third attachment surface 43 is a gentle multi-step in space.

[0030] The second attachment surface 42 is at least partially embedded within the thickness of the mounting plate 10, thereby reducing the overall outer height of the flexible connection cable 40 and minimizing the thickness occupied by the module in certain areas. This facilitates a narrow bezel / ultra-thin design for the entire device and also provides space for the stacking of the display area and the bezel area. The staggered arrangement of the first circuit board 20 and the second circuit board 30 on the mounting plate 10 allows for a certain amount of routing slack in the cable within the board surface. Combined with the stepped attachment, this reduces the cable length and material usage, while also reserving space for adjacent components, such as battery components.

[0031] In one specific embodiment, the cross-sectional shape of the sink 11 is "L" shaped. The sink 11 includes a first straight segment 111 extending along the edge of the first circuit board 20 and a second straight segment 112 extending toward the second circuit board 30. The flexible connecting cable 40 includes a first smooth portion 421 and a second smooth portion 422. The first smooth portion 421 and the second smooth portion 422 are continuously connected to form the second attachment surface 42. The first smooth portion 421 is disposed on the first straight segment 111, and the second smooth portion 422 is disposed on the second straight segment 112.

[0032] Specifically, the sink 11 is composed of a first straight segment 111 extending along the edge of the first circuit board 20 and a second straight segment 112 extending toward the second circuit board 30. The two segments are perpendicular or nearly perpendicular to each other and form a continuous transition at the corner.

[0033] The flexible connecting cable 40 is designed with two continuous smooth sections, a first smooth section 421 and a second smooth section 422, near the middle section of the attachment area. Together, they form the second attachment surface 42. The first smooth section 421 is laid along the first straight segment 111, and the second smooth section 422 is laid along the second straight segment 112. The corners at the junction of the two segments are transitioned by a smooth curved surface. To make the cable enter and leave the sink 11 more smoothly, the first smooth section 421 and the third attachment surface 43, as well as the second smooth section 422 and the first attachment surface 41, are continuously transitioned by bending radii to avoid sharp bends.

[0034] The second attachment surface 42, with its "L"-shaped guide within the plane, allows the direction change of the ribbon cable to be completed at the bottom of the groove, avoiding sharp bends at the edge of the circuit board, significantly increasing the equivalent bending radius, and reducing stress concentration between the copper foil and the cover film at the corner. The second attachment surface 42 is at least partially embedded within the thickness of the mounting plate 10, reducing the overall stack-up height and thus freeing up space for the display module bezel area, which is beneficial for overall thinning and bezel narrowing.

[0035] In one specific embodiment, the flexible connecting cable 40 further has a first bent portion 44 and a second bent portion 45. The first bent portion 44 connects one end of the first attachment surface 41 and the second attachment surface 42, and the second bent portion 45 connects the other end of the second attachment surface 42 and the third attachment surface 43.

[0036] Specifically, the first curved portion 44 is located between one end of the first attachment surface 41 and the second attachment surface 42, forming a smooth transition along the thickness direction and the planar direction of the ribbon cable, allowing the ribbon cable to naturally sink from the surface of the first circuit board 20 to the bottom of the sinking groove 11; the second curved portion 45 is located between the other end of the second attachment surface 42 and the third attachment surface 43, allowing the ribbon cable to smoothly rise from the bottom of the groove and attach to the surface of the second circuit board 30. The first curved portion 44, the second curved portion 45 and the second attachment surface 42 are connected by a continuous curved surface, preferably with an arc transition, to ensure that the curvature gradually changes along the path.

[0037] In one specific embodiment, a first embedding opening 12 and a second embedding opening 13 are respectively provided at the junction of the sinking groove 11 and the surface of the mounting plate 10. The first embedding opening 12 is located between the first straight segment 111 and the plate surface of the mounting plate 10, and the second embedding opening 13 is located between the second straight segment 112 and the plate surface of the mounting plate 10. The first curved portion 44 is located in the first embedding opening 12, and the second curved portion 45 is located in the second embedding opening 13.

[0038] Specifically, the first embedding port 12 is located between the first straight section 111 of the recessed groove 11 and the surface of the mounting plate 10, and is used to guide the flexible connecting cable 40 from the first attachment surface 41 into the bottom of the groove; the second embedding port 13 is located between the second straight section 112 of the recessed groove 11 and the surface of the mounting plate 10, and is used to guide the flexible connecting cable 40 from the bottom of the groove to the third attachment surface 43. The first embedding port 12 and the second embedding port 13 embed the bending trajectory of the flexible connecting cable 40 into the groove opening range, shorten the exposed bending boundary, reduce the risk of bulging and warping caused by assembly pressing and external force scraping, and reduce the encroachment on the space of adjacent devices, thereby cooperating with the recessed groove 11 to achieve overall layer thinning.

[0039] In one specific embodiment, the width of the sinking trough 11 is denoted as a, and the width of the flexible connecting cable 40 is denoted as b, satisfying the relationship: 1.1b≤a≤1.6b.

[0040] Specifically, when a approaches 1.1b, the lateral constraint on the cable within the groove is enhanced, which can effectively suppress lateral movement and drooping during the bonding process; when a approaches 1.6b, the allowance on both sides of the bottom of the groove provides buffer space for the spread of the adhesive layer at the edge of the cable, thermal expansion and contraction, and minor assembly deviations, avoiding edge adhesive buildup or lifting due to interference.

[0041] In one specific embodiment, the first attachment surface 41 is bonded and fixed to the first circuit board 20, and the first attachment surface 41 is provided with conductive solder joints 411, which are soldered one-to-one with the solder pads 21 of the first circuit board 20.

[0042] Specifically, the first attachment surface 41 is fixed to the first circuit board 20 by an adhesive medium, forming a surface contact holding area at the end. A plurality of conductive solder points 411 are provided on the first attachment surface 41, and the array arrangement, spacing, and shape of the solder points are matched one-to-one with the corresponding pads 21 on the first circuit board 20. The solder points can be any of the following forms: solder bumps formed by solder paste reflow, pre-placed solder balls or electroplated tin, or micro-bumps, and are fused and soldered to the pads 21 after mounting to achieve a metallurgical connection.

[0043] In one specific embodiment, the first circuit board 20 is arranged longitudinally along the mounting plate 10, and the second circuit board 30 is arranged laterally along the mounting plate 10.

[0044] Specifically, "vertical" refers to the length direction of the mounting plate 10, and "horizontal" refers to the width direction of the mounting plate 10. The first circuit board 20 needs to support a large number of signal interfaces corresponding to the long side of the display screen. The vertical arrangement allows it to extend along the edge of the display screen, arranging the high-density display signal interfaces close to the edge, freeing up the plane area in the middle of the mounting plate 10, and providing a complete rectangular space for the battery and other core components. The second circuit board 30 connects the charging interface and the horizontally distributed components of the radio component. The horizontal arrangement can shorten the connection path to these components. The two circuit boards intersect perpendicularly to form an "L" shape, which fits the space at the corner of the mobile phone. A mounting slot for accommodating the battery component is opened in this space. The flexible connection cable 40 is placed in the mounting slot together with the battery component, and the flexible connection cable 40 is clamped between the battery component and the mounting plate 10.

[0045] The “L”-shaped recessed groove 11 presses the middle section of the flexible connecting cable 40 into the thickness of the mounting plate 10; the two bent parts of the flexible connecting cable 40 are respectively embedded in the first embedding port 12 and the second embedding port 13, shortening the exposed bending height and boundary length, reducing the peak thickness of the stack, and increasing the available height window at the corners.

[0046] In one specific embodiment, the third attachment surface 43 is provided with a metal plug terminal 431, and the second circuit board 30 is provided with a corresponding plug slot 31. The metal plug terminal 431 is inserted into the plug slot 31 and fixed by solder.

[0047] Specifically, the insertion slot 31 is preferably a through or semi-through structure, and the slot opening is chamfered to guide the terminal into the slot and avoid scratching the third attachment surface 43; the terminal shape can be sheet-like or bent U-shaped / boss-shaped to obtain a reliable positioning surface and solder receiving gap in the slot.

[0048] In one specific embodiment, the mounting plate 10 is integrally injection molded from a plastic alloy material.

[0049] Specifically, the hybrid design of plastic alloy with reinforcing ribs and local inserts significantly reduces weight while maintaining overall rigidity and impact resistance, freeing up load-bearing capacity and thickness margin in corner areas, which is beneficial for the stacking and compression of cables and battery components. Injection molding simultaneously forms shallow grooves for tape guidance and anti-pinch chamfers, facilitating the application and surface pressure clamping of protective tape 46, reducing the need for additional pressure blocks and other space-consuming components, thereby further reducing the space occupied by interfaces and corner areas.

[0050] In one specific embodiment, the outer surface of the flexible connection cable 40 is wrapped with protective tape 46.

[0051] Specifically, the protective tape 46 is continuously applied along the length of the flexible connecting cable 40. At the second attachment surface 42 and the first and second bends 45, the tape forms a full-width wrap and extends beyond the edges and corners, creating a flexible isolation layer between the edge of the cable and the wall of the sink trough 11 and the chamfer of the insertion opening. The tape is preferably a single-layer or composite structure that is wear-resistant and resistant to reflow temperature.

[0052] The tape thickness and number of overlapping layers are matched with the groove width and ribbon width, and the edges are sealed using overlapping or butt joints to prevent lifting and scratching. Guide shallow groove alignment marks can be set on the outer surface of the tape to facilitate coaxial bonding with the path of the recessed groove 11. Therefore, the mobile phone display cable structure 100 provided above, by setting a recessed groove 11 on the mounting plate 10, and forming a first attachment surface 41, a second attachment surface 42 and a third attachment surface 43 of the flexible connection cable 40 in sequence, and the second attachment surface 42 is at least partially embedded in the thickness of the mounting plate 10, thereby realizing the positioning of the flexible connection cable 40 to avoid displacement, reducing space occupation to meet the requirements of the whole machine to be thinner and lighter, and at the same time, the stepped attachment layout disperses the stress at the bending point, improves the structural strength and connection stability of the cable, and ensures the reliability of the mobile phone display signal transmission.

[0053] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A mobile phone display screen ribbon cable structure, characterized in that, include: The mounting plate has a recessed groove. A first circuit board is disposed on the mounting plate and is arranged adjacent to the sinking groove; The second circuit board is adjacent to and offset from the first circuit board on the mounting plate; A flexible connecting cable, one end of which is connected to the first circuit board and the other end of which is connected to the second circuit board; The flexible connecting cable has a first attachment surface, a second attachment surface, and a third attachment surface that are sequentially and arranged in a stepped manner. The first attachment surface is disposed on the first circuit board, the second attachment surface is disposed on the bottom of the sinking groove, and the second attachment surface is at least partially embedded in the thickness of the mounting plate. The third attachment surface is disposed on the second circuit board.

2. The mobile phone display screen ribbon cable structure according to claim 1, characterized in that, The cross-sectional shape of the sinking trough is "L" shaped, and the sinking trough includes a first straight segment extending along the edge of the first circuit board and a second straight segment extending toward the second circuit board; The flexible connection cable includes a first smooth portion and a second smooth portion, which are continuously connected to form the second attachment surface. The first smooth portion is disposed on the first straight segment, and the second smooth portion is disposed on the second straight segment.

3. The mobile phone display screen ribbon cable structure according to claim 2, characterized in that, The flexible connecting cable also has a first bent portion and a second bent portion. The first bent portion connects one end of the first attachment surface and one end of the second attachment surface, and the second bent portion connects the other end of the second attachment surface and the third attachment surface.

4. The mobile phone display screen ribbon cable structure according to claim 3, characterized in that, The junction between the sinking groove and the surface of the mounting plate is provided with a first embedding opening and a second embedding opening. The first embedding opening is located between the first straight segment and the surface of the mounting plate, and the second embedding opening is located between the second straight segment and the surface of the mounting plate. The first curved portion is located in the first embedding opening, and the second curved portion is located in the second embedding opening.

5. The mobile phone display screen ribbon cable structure according to claim 1, characterized in that, Let the width of the sinking trough be 'a', and the width of the flexible connecting cable be 'b', satisfying the following relationship: 1.1b≤a≤1.6b.

6. The mobile phone display screen ribbon cable structure according to claim 1, characterized in that, The first adhesive surface is bonded and fixed to the first circuit board, and the first adhesive surface is provided with conductive solder joints, which are soldered one-to-one with the solder pads of the first circuit board.

7. The mobile phone display screen ribbon cable structure according to claim 1, characterized in that, The first circuit board is arranged longitudinally along the mounting plate, and the second circuit board is arranged transversely along the mounting plate.

8. The mobile phone display screen ribbon cable structure according to claim 1, characterized in that, The third attachment surface is provided with a metal plug terminal, and the second circuit board is provided with a corresponding plug slot. The metal plug terminal is inserted into the plug slot and fixed by solder.

9. The mobile phone display screen ribbon cable structure according to claim 1, characterized in that, The mounting plate is made of plastic alloy material and is injection molded in one piece.

10. The mobile phone display screen ribbon cable structure according to claim 1, characterized in that, The outer surface of the flexible connector cable is wrapped with protective tape.

Images