FPC (Flexible Printed Circuit) finger structure of LCD (Liquid Crystal Display) narrow jaw

Abstract

According to the FPC finger structure of the LCD narrow jaw, a connecting groove is formed in the bottom of a lower frame, and the connecting groove is connected with the FPC finger structure; the FPC finger structure comprises a connecting shell, the connecting shell is in limiting clamping connection with the connecting groove through a plugging assembly, the plugging assembly comprises a limiting insertion cylinder, a limiting insertion rod is arranged in the connecting shell, a clamping rod is arranged between the limiting insertion rod and the inner wall of the connecting shell, a clamping block is arranged at the top of the clamping rod, and the clamping block is matched with the clamping groove in a plugging mode; the tail part of the connecting shell is fixedly connected with a plugging head, and a moving assembly for driving the clamping rod to move is arranged in the plugging head; through the arrangement of the reinforcing sheet and the plugging assembly, the stability of the gold finger in the plugging process can be improved, the fracture resistance of the gold finger is improved, the fracture probability of the gold finger is reduced, and the service life is prolonged; in addition, through the arrangement of the warning module, the golden fingers are not damaged in the plugging and unplugging process, and the service life of the golden fingers is further prolonged.

Description

Technical Field

[0001] This invention relates to the field of LCD display technology, and more particularly to an FPC finger structure for LCD with a narrow chin. Background Technology

[0002] With the increasingly widespread use of panel displays, full-screen technology has become a crucial technological aspect. Simultaneously, the narrow bezel design of display panels is becoming increasingly important within full-screen technology. Narrow bezel design is the primary way to increase the screen-to-body ratio. Advanced displays are increasingly trending towards screen-to-body ratios exceeding 90%.

[0003] Publication number CN217405064U discloses a narrow bottom bezel for an LCD, including an LCD screen. The LCD screen includes a color filter layer and a bottom bezel, with the bottom bezel positioned below the color filter layer. A display area is disposed on the color filter layer. The bottom bezel contains shortened and widened flexible circuit board fingers, a liquid crystal driver chip, and a flexible circuit board. The flexible circuit board is reinforced to the bottom bezel with rigid photosensitive adhesive. This invention can shorten the height of the flexible circuit board fingers and widen the width of the flexible circuit board fingers without increasing costs or affecting production processes and reliability, thereby reducing the length of the LCD's bottom bezel and improving the screen-to-body ratio.

[0004] However, the aforementioned narrow bottom bezel of an LCD has the following drawbacks in use: Because the gold fingers are very fragile, in order to ensure the strength of the gold fingers, a cover film is usually set on the rear half of the gold fingers. However, this cannot protect the part of the gold fingers exposed outside the cover film. The junction between the cover film and the gold fingers is a straight line, and the gold fingers may "wobble" during the insertion and removal process, making the gold fingers prone to misalignment and stress. This makes the edges of the FPC gold fingers prone to breakage due to stress, affecting the service life.

[0005] Therefore, this invention proposes an FPC finger structure that can reduce the probability of FPC gold finger breakage and achieve a narrow chin for LCDs. Summary of the Invention

[0006] The purpose of this invention is to solve the technical problems existing in the prior art and to provide an FPC finger structure for LCD with a narrow chin.

[0007] To achieve the above objectives, the technical solution provided by this invention is: an FPC finger structure for an LCD with a narrow chin, wherein the LCD screen includes an LCD display area, an FPC, and a bottom bezel, characterized in that: a connecting groove is provided at the bottom of the bottom bezel, the connecting groove is connected to the FPC finger structure, and the FPC finger structure is shortened and widened; the FPC finger structure includes a connecting shell, the connecting shell is engaged with the connecting groove via a plug-in assembly, the plug-in assembly includes a limiting insert cylinder disposed inside the connecting groove, and slots are provided on both sides of the groove wall of the connecting groove. The connecting housing has a limiting rod inside that inserts into the limiting insert. Movable locking rods are provided between the limiting rods on both sides and the inner walls of the connecting housing. A locking block is provided at the top of each locking rod, and the locking block penetrates the connecting housing and engages with the locking slot. A welding area for welding gold fingers is provided between the two limiting rods. Several gold fingers are welded onto the welding area, and a reinforcing plate is attached to the back of the welding area. A plug-in head is fixedly connected to the tail of the connecting housing. A cable routing channel is provided on the plug-in head, and a moving component that drives the locking rods is located inside the plug-in head.

[0008] Preferably, a partition is provided inside the plug-in head, and the moving component includes a telescopic cylinder disposed above the partition. The bottom of the snap-fit ​​rod extends into the plug-in head and is fixedly connected to the upper end of the telescopic cylinder. A connecting rod is fixedly connected to the lower end of the telescopic cylinder. The bottom of the connecting rod extends out of the plug-in head and is connected to a moving block. A moving groove for the moving connecting rod is opened at the bottom of the plug-in head. A conductive pressing block is fixedly disposed at the end of the telescopic cylinder. The bottom of the conductive pressing block extends into the lower part of the partition. Fixed plates are provided on both sides of the outer wall of the cable channel. Guide rods are fixedly disposed on the fixed plates. Guide grooves are opened at the axis of both the telescopic cylinder and the conductive pressing block. The other end of the guide rod extends into the guide groove and is slidably connected to the guide groove. A spring is provided around the outer ring of the guide rod. The two ends of the spring are fixedly connected to the conductive pressing block and the fixed plate, respectively.

[0009] Preferably, the plug head is equipped with an alarm module located below the partition. The alarm module includes two circuit boxes located at the bottom of the plug head, with the two circuit boxes located on both sides of the cable channel. An alarm circuit is installed inside the circuit box, and a yellow light conductive block, a green light conductive block, and a red light conductive block connected to the alarm circuit are installed on the top of the circuit box.

[0010] Preferably, the alarm circuit includes a power supply, an alarm light, and a conductive pressing block. The alarm light includes a yellow light, a green light, and a red light. The yellow light, green light, and red light are respectively connected to the yellow light conductive block, the green light conductive block, and the red light conductive block via wires. The bottom of the conductive pressing block is provided with conductive contacts. As the conductive pressing block moves, the conductive contacts contact the yellow light conductive block, the green light conductive block, and the red light conductive block, thus completing the alarm circuit.

[0011] Preferably, there are two sets of warning lights, which are respectively located on the upper and lower sides of the bottom of the connector. The upper set of warning lights is connected to the warning circuit in the circuit box on the left side of the cable channel, and the lower set of warning lights is connected to the warning circuit in the circuit box on the right side of the cable channel.

[0012] Preferably, insulating pads are provided between the yellow light conductive block, the green light conductive block, and the red light conductive block.

[0013] Preferably, the width of the reinforcing sheet matches the width of the welding area, and the reinforcing sheet is a transparent hard plastic sheet.

[0014] Beneficial effects of this invention: This invention, through the design of the reinforced plate and insertion / removal assembly, avoids "wobbling" during the insertion and removal of the gold fingers; it improves the stability of the gold finger insertion and removal process, increases the gold fingers' resistance to breakage, reduces the probability of breakage, and extends their service life; furthermore, the invention's alarm module allows operators to clearly see the disengagement status of the locking block from the locking slot, thus preventing damage to the gold fingers during insertion and removal using the insertion / removal assembly and moving assembly, further extending the lifespan of the gold fingers. Attached Figure Description

[0015] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0016] Figure 1 This is a front view of the LCD screen of the present invention; Figure 2 This is a schematic diagram of the connection between the lower frame and the FPC of the present invention; Figure 3 This is a side view schematic diagram of the structure of the gold finger of the present invention; Figure 4 This is a schematic diagram of the connection groove on the lower frame of the present invention and the connection shell on the FPC; Figure 5 This is a schematic diagram of the alarm module inside the plug-in head in this invention; Figure 6 This is the alarm circuit diagram of the alarm module of the present invention.

[0017] Attached image captions: 1-LCD display area, 2-bottom bezel, 3-connection slot, 4-gold finger, 5-connection housing, 6-plug head, 7-yellow light, 8-green light, 9-red light, 10-ribbed cable channel, 11-moving slot, 12-moving block, 13-blocking block, 14-reinforcing plate, 15-welding area, 16-slot, 17-limiting insert, 18-connecting rod, 19-partition, 20-telescopic cylinder, 21-clamping rod, 22-limiting insert, 23-conductive extrusion block, 24-guide rod, 25-spring, 26-conductive contact, 27-yellow light conductive block, 28-green light conductive block, 29-red light conductive block, 30-circuit box. Detailed Implementation

[0018] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0020] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1-6In a preferred embodiment of the present invention, an FPC finger structure for a narrow chin LCD screen is provided. The LCD screen includes an LCD display area 1, an FPC, and a bottom bezel 2. A connecting groove 3 is provided at the bottom of the bottom bezel 2, and the connecting groove 3 is connected to the FPC finger structure. The FPC finger structure is shortened and widened. The FPC finger structure includes a connecting shell 5, which is engaged with the connecting groove 3 by a plug-in assembly. The plug-in assembly includes a limiting insert 17 disposed inside the connecting groove 3. Slots 16 are provided on both sides of the groove wall of the connecting groove 3. The connecting shell 5 is provided with a fitting for inserting the limiting insert 17. The limiting rod 22 on both sides is provided with movable locking rod 21 between the limiting rod 22 on both sides and the inner wall of the connecting shell 5. The top of the locking rod 21 is provided with a locking block 13, which penetrates the connecting shell 5 and is inserted into the locking slot 16. A welding area 15 for welding gold fingers 4 is provided between the two limiting rods 22. Several gold fingers 4 are welded on the welding area 15, and a reinforcing plate 14 is attached to the back of the welding area 15. A plug-in head 6 is fixedly connected to the tail of the connecting shell 5. A cable channel 10 is opened on the plug-in head 6, and a moving component for driving the locking rod 21 to move is provided inside the plug-in head 6.

[0023] Preferably, the limiting insert 17 and the limiting insert 22 are made of plastic materials, such as nylon, BMC or polycarbonate.

[0024] Specifically, during use, when the connecting housing 5 is inserted into the connecting groove 3, the limiting rod 22 is inserted into the limiting tube 17, thereby limiting the gold fingers 4 inside the connecting housing 5 and reducing the probability of misalignment of the gold fingers 4 during insertion and removal. Then, the locking block 13 on the locking rod 21 is inserted into the locking groove 16 to improve the stability of the gold fingers 4 inside the connecting housing 5 during insertion and removal, increase the fixing effect between the connecting housing 5 and the connecting groove 3, and increase the resistance to breakage of the gold fingers 4. Furthermore, a reinforcing plate 14 is provided on the back of the welding area 15 to increase the resistance to breakage of the gold fingers 4.

[0025] By designing the reinforcing plate 14 and the insertion / removal assembly, this invention can prevent the gold finger 4 from "wobbling" during insertion and removal; improve the stability of the gold finger 4 during insertion and removal, increase the gold finger 4's resistance to breakage, reduce the probability of breakage, and extend its service life.

[0026] Furthermore, the width of the reinforcing sheet 14 matches the width of the welding area 15, and the reinforcing sheet 14 is a transparent hard plastic sheet.

[0027] In this embodiment, a partition 19 is provided inside the plug-in head 6. The moving assembly includes a telescopic cylinder 20 disposed above the partition 19. The bottom of the locking rod 21 extends into the plug-in head 6 and is fixedly connected to the upper end of the telescopic cylinder 20 (a groove for the locking rod 21 to move is provided on the plug-in head 6). A connecting rod 18 is fixedly connected to the lower end of the telescopic cylinder 20. The bottom of the connecting rod 18 extends out of the plug-in head 6 and is connected to a moving block 12. A moving groove 11 for the connecting rod 18 to move is provided at the bottom of the plug-in head 6. A conductive extruder is fixedly provided at the end of the telescopic cylinder 20. The bottom of the pressure block 23 and the conductive extrusion block 23 extends below the partition plate 19 (the partition plate 19 has a through groove for the conductive extrusion block 23 to move). The outer walls of the cable channel 10 are provided with fixing plates on both sides. The fixing plates are fixedly provided with guide rods 24. The telescopic cylinder 20 and the conductive extrusion block 23 are both provided with guide grooves at their axial centers. The other end of the guide rod 24 extends into the guide groove and slides in connection with the guide groove. The outer ring of the guide rod 24 is provided with a spring 25. The two ends of the spring 25 are fixedly connected to the conductive extrusion block 23 and the fixing plate, respectively.

[0028] Specifically, during the insertion and removal of the gold finger 4, firstly, during insertion, the operator moves two movable blocks 12 towards each other in the direction of the cable routing channel 10. The movable blocks 12 drive the connecting rod 18 towards the cable routing channel 10, which in turn drives the telescopic cylinder 20 and the conductive pressing block 23 towards the cable routing channel 10. This, in turn, causes the telescopic cylinder 20 to drive the locking rod 21 towards the cable routing channel 20. The locking rod 21 then drives the locking block 13 towards the cable routing channel 10 until the locking block 13 is moved into the connecting housing 5. Subsequently, the connecting housing 5 is inserted into the connecting slot 3 (with the limiting insert 22 inserted directly opposite the limiting insert 17). During the movement of the telescopic cylinder 20 and the conductive pressing block 23 towards the cable routing channel 10, the conductive pressing block 23 compresses the spring 25, causing the spring 25 to be in a compressed state. The connecting housing 5... After inserting into the connecting slot 3, the moving block is released, the spring 25 rebounds, pushing the conductive pressing block 23 and the telescopic cylinder 20 to reset. Thus, the telescopic cylinder 20 drives the locking block 13 to move and insert into the locking slot 16 in the connecting slot 3, realizing the insertion of the connecting shell 5, that is, realizing the insertion of the gold finger 4. When the gold finger 4 is pulled out, the two moving blocks 12 need to be moved towards each other in the direction of the ribbon cable channel 10. The moving blocks 12 drive the connecting rod 18 to move in the direction of the ribbon cable channel 10. The connecting rod 18 drives the telescopic cylinder 20 and the conductive pressing block 23 to move in the direction of the ribbon cable channel 10. Thus, the telescopic cylinder 20 drives the locking rod 21 to move in the direction of the ribbon cable channel 10. The locking rod 21 drives the locking block 13 to disengage from the locking slot 16, thus realizing the removal of the connecting shell 5. The operation is simple and convenient, making the insertion and removal process of the gold finger 4 simple and convenient.

[0029] Furthermore, the shape of the movable block 12 can be optimized by drawing on ergonomic principles.

[0030] It should be further explained in this invention that there is a technical defect in the insertion and removal process of the gold finger 4. In the process of removing the gold finger 4 through the insertion and removal component and the moving component, since this invention moves two moving blocks 12 towards each other in the direction of the ribbon cable channel 10, and finally realizes that the locking rod 21 drives the locking block 13 to disengage from the slot 16, thereby achieving the purpose of removing the gold finger 4, since the locking block 13 is located inside the connecting groove 3, the operator cannot clearly know the disengagement status of the locking block 13 from the slot 16.

[0031] If the two moving blocks 12 move only a small distance and fail to disengage the locking block 13 from the slot 16, and the operator forcibly pulls out the gold finger 4, the connecting housing 5 may be damaged, and in severe cases, the gold finger 4 may be damaged. If the two moving blocks 12 move too much, although the locking block 13 disengages from the slot 16, the locking rod 21 may squeeze the limiting insert 17 in the connecting groove 3, causing the limiting insert 17 to deform, and in severe cases, the gold finger may be damaged.

[0032] Therefore, the present invention provides the following technical solution to solve the above-mentioned technical defects.

[0033] In this embodiment, an alarm module is provided inside the plug-in head 6. The alarm module is located below the partition 19. The alarm module includes two circuit boxes 30 located at the bottom of the plug-in head 6. The two circuit boxes 30 are respectively located on both sides of the cable channel 10. An alarm circuit is provided inside the circuit box 30. A yellow light conductive block 27, a green light conductive block 28, and a red light conductive block 29 connected to the alarm circuit are provided on the top of the circuit box 30.

[0034] The alarm circuit includes a power supply, an alarm light, and a conductive pressing block 23. The alarm light includes a yellow light 7, a green light 8, and a red light 9. The yellow light 7, green light 8, and red light 9 are connected to the yellow light conductive block 27, the green light conductive block 28, and the red light conductive block 29 respectively via wires. The bottom of the conductive pressing block 23 is provided with a conductive contact 26. As the conductive contact 26 moves with the conductive pressing block 23, it contacts the yellow light conductive block 27, the green light conductive block 28, and the red light conductive block 29, thus completing the alarm circuit.

[0035] Specifically, during use, the operator moves the two moving blocks 12 toward each other in the direction of the cable channel 10, which drives the telescopic cylinder 20 and the conductive extrusion block 23 to move, thereby driving the conductive contact 26 below the conductive extrusion block 23 to move. When the conductive contact 26 contacts the yellow light conductive block 27, the power supply, conductive pressing block 23, conductive contact 26, yellow light conductive block 27 and yellow light 7 form a circuit, and the yellow light 7 lights up, indicating to the staff that the moving block 12 has moved a distance that makes the card block 13 not completely disengaged from the card slot 16 and cannot be forcibly pulled out. When the conductive contact 26 contacts the green light conductive block 28, the power supply, conductive pressing block 26, conductive contact 26, green light conductive block 28 and green light 8 form a circuit, and green light 8 lights up to indicate to the staff that the moving block 12 has moved a distance so that the card block 13 is completely disengaged from the card slot 16 and can be pulled out. When conductive contact 26 contacts red light conductive block 29, a circuit is formed between the power supply, conductive pressing block 23, conductive contact 26, red light conductive block 29, and red light 9. Red light 9 illuminates, indicating to the operator that the moving block 12 has moved a distance sufficient to completely disengage the locking block 13 from the locking slot 16, and the locking rod 21 has pressed against the limiting insert 17. (It should be further noted that the operator can remove the device when green light 8 illuminates; there is no need to wait for red light 9 to illuminate before reducing the distance of moving block 12.) The present invention enables staff to clearly know the disengagement status of the card block 13 from the card slot 16 through the setting of the alarm module, thereby preventing damage to the gold finger 4 during the insertion and removal of the insertion and removal components and further extending the service life of the gold finger 4.

[0036] Furthermore, insulating pads are provided between the yellow light conductive block 27, the green light conductive block 28, and the red light conductive block 29 (preferably, the insulating pads are extremely thin, and their movement relative to the conductive contacts 26 on the conductive extrusion block 23 is negligible).

[0037] Furthermore, the spring 25 between the conductive extrusion block 23 and the fixing plate is insulated, for example, by coating or plating (epoxy resin, paint) on the outside of the spring 25.

[0038] Furthermore, two sets of warning lights are provided, located on the upper and lower sides of the bottom of the connector 6 (the upper and lower sides of the cable routing channel 10). The upper set of warning lights is connected to the warning circuit in the circuit box 30 on the left side of the cable routing channel 10, and the lower set is connected to the warning circuit in the circuit box 30 on the right side of the cable routing channel 10. The arrangement of these two sets of warning lights allows for a clearer understanding of the engagement status of the locking blocks 13 on both sides of the connecting housing 5.

[0039] Without causing conflict, those skilled in the art can freely combine and use the above-mentioned additional technical features.

[0040] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by essentially the same means is within the protection scope of the present invention.

Claims

1. A narrow-chin FPC finger structure for an LCD screen, the LCD screen comprising an LCD display area, an FPC, and a bottom bezel, characterized in that: A connecting groove is provided at the bottom of the lower frame, which connects to the FPC finger structure. The FPC finger structure is shortened and widened. The FPC finger structure includes a connecting shell, which is engaged with the connecting groove via a plug-in assembly. The plug-in assembly includes a limiting insert cylinder inside the connecting groove, and slots are provided on both sides of the groove wall. A limiting rod is provided inside the connecting shell to engage with the limiting insert cylinder. Movable locking rods are provided between the limiting rods on both sides and the inner walls of the connecting shell. A locking block is provided at the top of the locking rod, which penetrates the connecting shell and engages with the slot. A welding area for welding gold fingers is provided between the two limiting rods. Several gold fingers are welded on the welding area, and a reinforcing plate is attached to the back of the welding area. A plug-in head is fixedly connected to the tail of the connecting shell. A cable routing channel is provided on the plug-in head, and a moving assembly for driving the locking rods is provided inside the plug-in head.

2. The FPC finger structure for a narrow chin LCD screen according to claim 1, characterized in that: The plug-in head is equipped with a partition. The moving component includes a telescopic cylinder located above the partition. The bottom of the snap-fit ​​rod extends into the plug-in head and is fixedly connected to the upper end of the telescopic cylinder. A connecting rod is fixedly connected to the lower end of the telescopic cylinder. The bottom of the connecting rod extends out of the plug-in head and is connected to a moving block. A moving groove is provided at the bottom of the plug-in head for the connecting rod to move. A conductive pressing block is fixedly installed at the end of the telescopic cylinder. The bottom of the conductive pressing block extends into the partition. Fixed plates are provided on both sides of the outer wall of the cable channel. Guide rods are fixedly installed on the fixed plates. Guide grooves are provided at the axis of both the telescopic cylinder and the conductive pressing block. The other end of the guide rod extends into the guide groove and is slidably connected to the guide groove. A spring is provided around the outer ring of the guide rod. The two ends of the spring are fixedly connected to the conductive pressing block and the fixed plate, respectively.

3. The FPC finger structure for a narrow chin LCD screen according to claim 2, characterized in that: The plug head has an internal alarm module located below the partition. The alarm module includes two circuit boxes located at the bottom of the plug head, with the two circuit boxes located on both sides of the cable channel. The circuit boxes contain alarm circuits, and the top of the circuit boxes has yellow light conductive blocks, green light conductive blocks, and red light conductive blocks connected to the alarm circuits.

4. The FPC finger structure for a narrow chin LCD screen according to claim 3, characterized in that: The alarm circuit includes a power supply, an alarm light, and a conductive pressing block. The alarm light includes a yellow light, a green light, and a red light. The yellow light, green light, and red light are connected to the yellow light conductive block, the green light conductive block, and the red light conductive block, respectively, through wires. The bottom of the conductive pressing block is provided with conductive contacts. As the conductive pressing block moves, the conductive contacts come into contact with the yellow light conductive block, the green light conductive block, and the red light conductive block, thus completing the alarm circuit.

5. The FPC finger structure for a narrow chin LCD screen according to claim 4, characterized in that: There are two sets of warning lights, which are located on the top and bottom sides of the connector. The top set of warning lights is connected to the warning circuit in the circuit box on the left side of the cable channel, and the bottom set of warning lights is connected to the warning circuit in the circuit box on the right side of the cable channel.

6. The FPC finger structure for a narrow chin LCD according to claim 5, characterized in that: Insulating pads are placed between the yellow light conductive blocks, the green light conductive blocks, and the red light conductive blocks.

7. The FPC finger structure for a narrow chin LCD screen according to claim 1, characterized in that: The width of the reinforcing sheet matches the width of the welding area, and the reinforcing sheet is a transparent hard plastic sheet.

Images