Circuit board structure and display device

Abstract

The invention discloses a circuit board structure and a display device, the circuit board structure comprises a printed circuit board, a flexible circuit board, a first golden finger, a second golden finger and a pressing structure, the printed circuit board is provided with a groove, the first golden finger is arranged in the groove, the first golden finger part protrudes out of the printed circuit board, and the second golden finger part protrudes out of the groove. The second golden finger is arranged on the flexible circuit board and protrudes out of the surface of the flexible circuit board, and the flexible circuit board is pressed in the groove of the printed circuit board through the pressing structure, so that the first golden finger is connected with the second golden finger, and conduction of the printed circuit board and the flexible circuit board is achieved. The first golden finger is prevented from shifting at a high temperature to influence the connection accuracy of the printed circuit board and the flexible circuit board, a special machine is not needed for production, and the product cost can be reduced.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a circuit board structure and a display device. Background Art

[0002] The circuit board structure is composed of a printed circuit board and a flexible circuit board. In particular, for the circuit board structure used on the display panel, the printed circuit board is generally not directly bound to the display panel, but is bound through a flexible circuit board. The connection between the printed circuit board and the flexible circuit board is generally achieved by applying anisotropic conductive adhesive to the gold fingers on the printed circuit board and the gold fingers on the flexible circuit board under high temperature and high pressure conditions, aligning the gold fingers on the printed circuit board with the gold fingers on the flexible circuit board, and pressing the anisotropic conductive adhesive with a special machine to crush the conductive particles to achieve the connection between the printed circuit board and the flexible circuit board.

[0003] The gold fingers on the printed circuit board will expand and contract due to heat and cold, and are prone to displacement under high temperature and high pressure conditions, which will cause deviations in the connection between the printed circuit board and the flexible circuit board, resulting in defective products. In addition, the above method requires a dedicated machine, which increases product costs.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present application is to provide a circuit board structure and a display device to avoid the connection accuracy being affected by thermal expansion and contraction when a printed circuit board is connected to a flexible circuit board.

[0006] Another purpose of the present application is to reduce the production cost of the product.

[0007] In order to achieve the above objectives, this application adopts the following technical solutions:

[0008] On the one hand, the present application discloses a circuit board structure, including a printed circuit board, a flexible circuit board, a first gold finger, a second gold finger and a pressing structure; a groove is provided on the printed circuit board, the first gold finger is provided in the groove and does not protrude from the printed circuit board, the first gold finger is electrically connected to the printed circuit board, the second gold finger is provided on the flexible circuit board and is electrically connected to the flexible circuit board, the second gold finger protrudes from the flexible circuit board, the second gold finger is provided corresponding to the first gold finger, the pressing structure is provided on the printed circuit board, the pressing structure abuts against the flexible circuit board so that the second gold finger is connected to the first gold finger, and the pressing structure can be rotated to be spaced apart from the flexible circuit board.

[0009] In some embodiments of the present application, the pressing structure includes a mounting seat, a shaft, a pressing piece and a locking assembly, the mounting seat is arranged on the printed circuit board, the shaft is rotatably connected to the mounting seat, the pressing piece is connected to the shaft, the pressing piece abuts against the flexible circuit board to press the second gold finger against the first gold finger, and the pressing piece can rotate with the shaft to loosen the connection with the flexible circuit board, the locking assembly can limit the rotation angle of the shaft, and when the locking assembly limits the shaft, the pressing piece presses against the flexible circuit board.

[0010] In some embodiments of the present application, the pressing part includes a handle portion and a pressing portion, the shaft body is arranged above the groove, the handle portion and the pressing portion are respectively connected to the shaft body, the handle portion and the pressing portion are arranged at an angle, and a pressing surface is formed on a side of the pressing portion away from the handle portion, and the pressing surface abuts against the flexible circuit board.

[0011] The pressing surface is configured as an arc surface, and along the rotation direction of the pressing member when pressing the flexible circuit board, the distance between the pressing surface and the flexible circuit board gradually decreases.

[0012] In some embodiments of the present application, the locking assembly includes a locking unit and an unlocking unit, the locking unit is arranged on the shaft body, and the unlocking unit is arranged on the mounting seat, the locking unit can extend into the mounting seat to limit the rotation of the shaft body, and the unlocking unit can drive the locking unit to reset into the shaft body to release the locking assembly from limiting the shaft body.

[0013] In some embodiments of the present application, a first opening is provided on the shaft body, and the locking unit is provided in the first opening; a second opening is provided on the mounting seat, and the unlocking unit is provided in the second opening; the locking unit can extend into the second opening to limit the rotation of the shaft body, and the unlocking unit can push the locking unit to reset to the first opening to release the locking assembly from limiting the shaft body.

[0014] In some embodiments of the present application, the locking unit includes a first elastic member and a first limiting block, the first elastic member is arranged in the first opening, the first limiting block is connected to one end of the first elastic member close to the opening of the first opening, and when the first opening corresponds to the second opening, the first elastic member can push the first limiting block to pass through the second opening.

[0015] The unlocking unit includes a push rod, which includes an unlocking part and a push rod part. The unlocking part is arranged at one end of the push rod part close to the first opening and can be connected with the first limit block; a second limit block is arranged in the second opening, the second limit block is spaced apart from the unlocking part, and is distributed on a side of the unlocking part away from the first opening, and the push rod part is passed through the second limit block; a second elastic member is arranged between the second limit block and the unlocking part, and after the unlocking part moves toward the first limit block, the second elastic member can drive the unlocking part to reset.

[0016] In some embodiments of the present application, a limit line is set on the flexible circuit board, the limit line is set on the side of the flexible circuit board facing away from the second gold finger, and the limit line is aligned with the edge of the printed circuit board close to the flexible circuit board.

[0017] In some embodiments of the present application, the printed circuit board includes a substrate layer, and a plurality of first conductor layers and a plurality of prepreg layers stacked on the substrate layer, wherein the first conductor layers and the prepreg layers are alternately arranged; or,

[0018] In some embodiments of the present application, the printed circuit board includes a substrate layer, a first conductor layer and a semi-cured film layer, the first conductor layer and the semi-cured film layer are respectively configured in plurality, the plurality of first conductor layers and the plurality of semi-cured film layers are respectively stacked on opposite sides of the substrate layer, and the first conductor layer and the semi-cured film layers are staggered.

[0019] In some embodiments of the present application, a second conductor layer is disposed on the groove wall of the groove, and the second conductor layer is respectively connected to the first gold finger and the first conductor layer facing the groove and / or the surface of the printed circuit board.

[0020] The groove is arranged between the substrate layer and the surface of the printed circuit board.

[0021] On the other hand, the present application also discloses a display device, including a display panel and a circuit board structure, wherein the circuit board structure is as described in any of the above items, and the flexible circuit board is electrically connected to the printed circuit board and the display panel respectively to realize driving of the display panel.

[0022] Beneficial effects:

[0023] The present application provides a circuit board structure, wherein a groove is arranged on a printed circuit board, a first gold finger is arranged in the groove, and the first gold finger does not protrude from the printed circuit board, a second gold finger protruding from the flexible circuit board is arranged on the flexible circuit board, the first gold finger and the second gold finger are arranged correspondingly, and the flexible circuit board is abutted against the printed circuit board through a pressing structure arranged on the printed circuit board, so that the first gold finger and the second gold finger are connected, thereby realizing conduction between the printed circuit board and the flexible circuit board, avoiding displacement of the first gold finger due to thermal expansion and contraction at high temperature, thereby affecting the connection accuracy between the printed circuit board and the flexible circuit board, reducing the defective rate of the product, and the structure does not need to use a dedicated machine to realize the connection between the printed circuit board and the flexible circuit board, which can reduce the product cost.

[0024] The display device provided in the present application is manufactured using the above-mentioned circuit board structure, and has a high yield rate and low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a circuit board structure provided in one embodiment of the present application.

[0026] Figure 2 A schematic diagram of the structure of a printed circuit board provided in one embodiment of the present application.

[0027] Figure 3 A schematic structural diagram of a printed circuit board provided in another embodiment of the present application.

[0028] Figure 4 for Figure 3 A magnified image of area A.

[0029] Figure 5 This is a schematic diagram of the connection structure between the flexible circuit board and the second gold finger in the first visual sense provided by one embodiment of the present application.

[0030] Figure 6 This is a schematic diagram of the connection structure between the flexible circuit board and the second gold finger under the second visual sense provided in one embodiment of the present application.

[0031] Figure 7 A schematic diagram of the state change of the pressing structure provided in one embodiment of the present application.

[0032] Figure 8 This is a schematic structural diagram of a first visual perspective of a pressing structure provided in one embodiment of the present application.

[0033] Fig. 9 This is a schematic structural diagram of a pressed structure under a second visual perspective provided in one embodiment of the present application.

[0034] Fig.10 A schematic structural diagram of a mounting base provided in one embodiment of the present application.

[0035] Fig.11 A schematic diagram of the connection structure between the shaft body and the pressing piece provided in one embodiment of the present application.

[0036] Description of main component symbols:

[0037] 1. printed circuit board; 11. groove; 12. substrate layer; 13. first conductor layer; 14. prepreg layer; 15. second conductor layer;

[0038] 2. Flexible circuit board; 21. Limit line;

[0039] 3. The first golden finger;

[0040] 4. The second golden finger;

[0041] 5. Pressing structure; 51. Mounting seat; 511. Second opening; 52. Axle; 521. First opening; 53. Pressing piece; 531. Handle portion; 532. Pressing portion; 5321. Pressing surface; 54. Locking assembly; 541. Locking unit; 5411. First elastic member; 5412. First limiting block; 542. Unlocking unit; 5421. Push rod; 54211. Unlocking portion; 54212. Push rod portion; 5422. Second limiting block; 5423. Second elastic member. DETAILED DESCRIPTION

[0042] The present application provides a circuit board structure and a display device. To make the purpose, technical solution and effect of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore, cannot be understood as a limitation on the present application. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0044] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] The present application provides a display device, including a display panel and a circuit board structure, wherein the circuit board structure is electrically connected to the display panel and is used to drive the display panel.

[0046] Figure 1 This is a schematic diagram of the structure of the circuit board provided in this application.

[0047] like Figure 1 See Figure 1 The circuit board structure includes a printed circuit board 1, a flexible circuit board 2, a first gold finger 3, a second gold finger 4 and a pressing structure 5.

[0048] Figure 2 This is a schematic diagram of the structure of a printed circuit board 1 provided in some embodiments of the present application. Figure 3 This is a schematic structural diagram of a printed circuit board 1 provided in some other embodiments of the present application.

[0049] like Figure 2 and Figure 3 As shown, the printed circuit board 1 is a multi-layer printed circuit board 1 .

[0050] like Figure 2 As shown, in some embodiments of the present application, the printed circuit board 1 includes a substrate layer 12, a first conductor layer 13 and a prepreg layer 14. The first conductor layer 13 and the prepreg layer 14 are respectively configured in plurality, and the plurality of first conductor layers 13 and the plurality of prepreg layers 14 are respectively stacked on the substrate layer 12, and the first conductor layer 13 and the prepreg layer 14 are stacked.

[0051] like Figure 3 As shown, in some other embodiments of the present application, the printed circuit board 1 includes a substrate layer 12, a first conductor layer 13 and a prepreg layer 14. The first conductor layer 13 and the prepreg layer 14 are respectively configured in plurality, and the plurality of first conductor layers 13 and the plurality of prepreg layers 14 are respectively stacked on opposite sides of the substrate layer 12, and the first conductor layers 13 and the prepreg layers 14 are staggered.

[0052] The substrate can be a copper clad core board, an epoxy resin substrate, an aluminum substrate or a ceramic substrate.

[0053] The selection of conductor material is very important because it directly affects the efficiency and stability of current transmission. Copper has good electrical conductivity, so the material of the first conductor layer 13 can be copper.

[0054] The electrical conductivity of copper is much higher than other common metals, such as aluminum and iron, which enables copper to transmit more current under the same electric field strength.

[0055] Copper has a relatively low resistivity, and its resistivity changes little with increasing temperature, which allows copper to maintain stable conductivity in high temperature environments. In addition, copper also has good corrosion resistance and can maintain its conductivity for a long time in harsh environments.

[0056] Prepreg, also known as prepreg, is an insulating material made of resin and glass fiber cloth. During the manufacturing process, the resin is treated to a semi-cured state, which is sticky enough to adhere to the glass fiber cloth and can maintain a certain plasticity during subsequent processing. Prepreg can easily achieve precise positioning and stacking in the production of circuit boards, thereby ensuring the stability and reliability of the circuit boards.

[0057] like Figure 2 and Figure 3 As shown, a groove 11 is provided on the printed circuit board 1. The groove 11 is configured as a slot. The groove 11 is provided on the surface of the printed circuit board 1 and penetrates through one side wall.

[0058] Figure 4 for Figure 3 A magnified image of area A.

[0059] like Figures 2 to 4 As shown, the first gold finger 3 is disposed in the groove 11 and is electrically connected to the printed circuit board 1 , and the first gold finger 3 does not protrude from the printed circuit board 1 .

[0060] Figure 5 This is a schematic diagram of the connection structure between the flexible circuit board 2 and the second gold finger 4 provided in the present application in the first visual sense. Figure 6 This is a schematic diagram of the connection structure between the flexible circuit board 2 and the second gold finger 4 provided in the present application under the second visual sense.

[0061] like Figure 5 and Figure 6As shown, the second gold finger 4 is arranged on the flexible circuit board 2, electrically connected to the flexible circuit board 2, and the second gold finger 4 protrudes from the flexible circuit board 2. The second gold finger 4 is arranged corresponding to the first gold finger 3, so that when the first gold finger 3 is connected to the second gold finger 4, the second gold finger 4 can be inserted into the groove 11, so that the groove 11 can limit the second gold finger 4, thereby improving the connection accuracy of the first gold finger 3 and the second gold finger 4. It can be understood that the sum of the thickness of the first gold finger 3 and the thickness of the second gold finger 4 is greater than the depth of the groove 11, so as to ensure the effective contact between the first gold finger 3 and the second gold finger 4.

[0062] like Figure 5 As shown, a limit line 21 is provided on the flexible circuit board 2. The limit line 21 is provided on the side of the flexible circuit board 2 facing away from the second gold finger 4. When the limit line 21 is aligned with the edge of the printed circuit board 1 close to the flexible circuit board 2, the second gold finger 4 and the first gold finger 3 are accurately aligned. By observing the relative position of the limit line 21 and the edge of the printed circuit board 1 close to the flexible circuit board 2, it is possible to intuitively determine whether the first gold finger 3 and the second gold finger 4 are aligned, thereby reducing the difficulty of aligning the first gold finger 3 and the second gold finger 4.

[0063] like Figure 4 As shown, a second conductor layer 15 is disposed on the groove wall of the groove 11. The second conductor layer 15 can be made of the same material as the first conductor layer 13 to ensure the consistency of conductivity, thereby improving the conductive stability of the printed circuit board 1.

[0064] The second conductor layer 15 is respectively connected to the first gold finger 3 and the first conductor layer 13 facing the groove 11 and the surface of the printed circuit board 1, so that the first conductor layer 13, the second conductor layer 15 and the conductive units on the surface of the printed circuit board 1 form a conductive structure, and there is no need to punch holes between different first conductor layers 13 and prepreg layers 14, thereby avoiding the influence of the parasitic effect of the via on the signal integrity transmitted by the printed circuit board 1, and improving the quality of signal transmission.

[0065] In the above, the depth of the groove can be set according to the setting position of the signal transmission line, and the first gold finger 3 can be set on any first conductor layer 13.

[0066] Exemplarily, when the groove penetrates the two first conductor layers 13, the second conductor layer 15 is electrically connected to the two first conductor layers 13 and the first gold finger 3 respectively, so that electrical conduction can be achieved between the two first conductor layers 13 without drilling, effectively reducing the number of vias and improving the signal transmission quality.

[0067] The second conductor layer 15 can be disposed on the groove wall of the groove 11 by electroplating, and has good thickness uniformity. It is stably connected to the groove wall of the groove 11, so that the second conductor layer 15 has relatively uniform conductivity, thereby achieving stable signal transmission.

[0068] In order to avoid reducing the strength of the printed circuit board 1 , the groove 11 does not penetrate the substrate layer 12 . The groove 11 is disposed between the substrate layer 12 and the surface of the printed circuit board 1 .

[0069] like Figure 1 As shown, the pressing structure 5 is arranged on the printed circuit board 1, the flexible circuit board 2 is connected to the printed circuit board 1, and the second gold finger 4 is correspondingly connected to the first gold finger 3. The pressing structure 5 abuts against the side of the flexible circuit board 2 facing away from the second gold finger 4, so that the second gold finger 4 is tightly attached to the first gold finger 3, thereby realizing an effective connection between the flexible circuit board 2 and the printed circuit board 1.

[0070] When it is necessary to release the fixation of the pressing structure 5 on the flexible circuit board 2 , the pressing structure 5 can be rotated to a detection setting with the flexible circuit board 2 .

[0071] Figure 7 This is a schematic diagram of the state change structure of the pressing structure 5 provided in this application. Figure 8 This is a schematic structural diagram of the first visual perspective of the pressing structure 5 provided in the present application. Fig. 9 This is a schematic structural diagram of the compression structure 5 provided in the present application under the second visual perspective.

[0072] like Figure 1 , Figure 7 , Figure 8 and Fig. 9 As shown, the pressing structure 5 includes a mounting seat 51 , an axle body 52 , a pressing piece 53 and a locking assembly 54 .

[0073] The mounting seat 51 is arranged on the printed circuit board 1. The mounting seat 51 can be soldered on the printed circuit board 1 by solder paste. There are two mounting seats 51, and the two mounting seats 51 are arranged at intervals, respectively arranged on the outer sides of the two ends of the extension direction of the groove 11. The shaft 52 is distributed above the groove 11, penetrates the mounting seat 51, and is rotatably connected to the mounting seat 51. The pressing piece 53 is connected to the shaft 52 and extends along the axial direction of the shaft 52. The pressing piece 53 can rotate with the shaft 52 to press against the flexible circuit board 2 to achieve a stable connection between the flexible circuit board 2 and the printed circuit board 1, or the pressing piece 53 can rotate to loosen the flexible circuit board 2 so that the flexible circuit board 2 can be removed from the printed circuit board 1. The structure is simple and easy to implement, and does not require heating and pressurization. It can effectively avoid the thermal expansion and contraction of the first gold finger 3 and ensure the connection accuracy between the first gold finger 3 and the second gold finger 4.

[0074] In some embodiments of the present application, the pressing member 53 includes a handle portion 531 and a pressing portion 532. The pressing portion 532 and the handle portion 531 are respectively connected to the shaft body 52. ​​The handle portion 531 and the pressing portion 532 are arranged at an angle so that there is enough gripping space between the two. A pressing surface 5321 is formed on the side of the pressing portion 532 away from the handle portion 531, and the pressing surface 5321 abuts against the flexible circuit board 2. When the pressing member 53 is rotated, the handle portion 531 can be grasped to rotate the pressing portion 532, and the pressing surface 5321 gradually abuts against the flexible circuit board 2 until it abuts on the flexible circuit board 2.

[0075] It is understandable that the width of the pressing portion 532 is not less than the distance between the shaft body 52 and the flexible circuit board 2 to ensure effective contact between the first gold finger 3 and the second gold finger 4 .

[0076] In some embodiments, the width of the handle portion 531 may be smaller than the distance between the shaft body 52 and the flexible circuit board 2 , thereby reducing the restriction on the rotation angle of the shaft body 52 .

[0077] like Figure 8 As shown, in order to reduce the damage of the pressing surface 5321 to the flexible circuit board 2, the pressing surface 5321 is set as an arc surface. Along the rotation direction of the pressing member 53 when pressing the flexible circuit board 2, the distance between the pressing surface 5321 and the flexible circuit board 2 gradually decreases, so that during the contact process between the pressing surface 5321 and the flexible circuit board 2, the pressure on the flexible circuit board 2 can be gradually increased, and the transition is smooth.

[0078] Fig.10 This is a schematic structural diagram of the mounting base 51 provided in this application. Fig.11 Schematic diagram of the connection structure between the shaft body 52 and the pressing piece 53 provided in the present application.

[0079] like Figures 9 to 11 As shown, the locking assembly 54 includes a locking unit 541 and an unlocking unit 542. The locking unit 541 is arranged on the shaft body 52, and the unlocking unit 542 is arranged on the mounting seat 51. The locking unit 541 and the unlocking unit 542 are arranged correspondingly to limit the rotation of the shaft body 52 or release the limit on the shaft body 52. ​​When the pressing portion 532 is perpendicular to the flexible circuit board 2, and the pressing surface 5321 is pressed on the flexible circuit board 2, the locking unit 541 and the unlocking unit 542 are arranged correspondingly, and the locking unit 541 can enter the mounting seat 51. At this time, the locking assembly 54 can limit the rotation of the shaft body 52, so that the pressing surface 5321 is always pressed on the flexible circuit board 2.

[0080] The unlocking unit 542 can drive the locking unit 541 to return to the shaft body 52 . At this time, the locking assembly 54 releases the restriction on the shaft body 52 , and the shaft body 52 can rotate, driving the pressing piece 53 to separate from the flexible circuit board 2 .

[0081] In some embodiments of the present application, the shaft body 52 is provided with a first opening 521, and the first opening 521 is provided at a position where the shaft body 52 is connected to the mounting. The locking unit 541 is provided in the first opening 521. The mounting seat 51 is provided with a second opening 511, and the unlocking unit 542 is provided in the second opening 511 and can move along the axis of the second opening 511. The locking unit 541 can extend into the second opening 511 to limit the rotation of the shaft body 52. ​​The unlocking unit 542 can push the locking unit 541 to return to the first opening 521 to release the locking assembly 54 from limiting the position of the shaft body 52.

[0082] The locking unit 541 includes a first elastic member 5411 and a first stopper 5412, wherein the first elastic member 5411 is disposed in the first opening 521, and the first stopper 5412 is connected to one end of the first elastic member 5411 close to the opening of the first opening 521. It is understandable that when the first elastic member 5411 and the first stopper 5412 are both in the first opening 521, the first elastic member 5411 is in a compressed state, and at this time, the first elastic member 5411 can accumulate elastic potential energy, and when the first opening 521 rotates to align with the second opening 511, the first elastic member 5411 can push the first stopper 5412 into the second opening 511 to block the shaft 52 from continuing to rotate.

[0083] The unlocking unit 542 includes a push rod 5421, which is inserted into the second opening 511 and can move along the axial direction of the second opening 511. One end of the push rod 5421 protrudes from the second opening 511, which is convenient for the user to operate the push rod 5421. The other end of the push rod 5421 can be connected to the first limit block 5412, thereby pushing the first limit block 5412 to return to the first opening 521, so that the locking unit 541 no longer blocks the rotation of the shaft body 52.

[0084] like Fig.10As shown, the push rod 5421 includes an unlocking portion 54211 and a push rod portion 54212 . The unlocking portion 54211 is disposed at one end of the push rod portion 54212 close to the first opening 521 and can contact the first limiting block 5412 to push the first limiting block 5412 to move toward the first opening 521 . A second limit block 5422 is provided in the second opening 511, and the first limit block is fixed on the hole wall of the second opening 511. The second limit block 5422 and the unlocking portion 54211 are spaced apart, and the second limit block 5422 is distributed on the side of the unlocking portion 54211 away from the first opening 521. The push rod portion 54212 is penetrated in the second limit block 5422 and can move axially along the second limit block 5422; a second elastic member 5423 is provided between the second limit block 5422 and the unlocking portion 54211, and after the unlocking portion 54211 moves toward the first limit block 5412, the second elastic member 5423 can drive the unlocking portion 54211 to reset, so as to release the limiting effect of the locking assembly 54 on the shaft body 52.

[0085] The first elastic member 5411 may be a compression spring. The second elastic member 5423 may be a compression spring. The compression spring has a simple structure and low cost, and can well realize the reset of the first limit block 5412 or the unlocking portion 54211.

[0086] The present application also provides a display device, including a display panel and a circuit board structure, the circuit board structure is as described above, and will not be repeated here. One end of the flexible circuit board 2 is connected to the printed circuit board 1 through a second gold finger 4, and the other end of the flexible circuit board 2 is also provided with a second gold finger 4, and the second end is connected to the display panel through the second gold finger 4, so that an electrically conductive structure is formed between the printed circuit board 1, the flexible circuit board 2 and the display panel, so that the circuit board drives the display panel.

[0087] The connection between the flexible circuit board 2 and the display panel mentioned above may adopt the structure of connecting the flexible circuit board 2 and the printed circuit board 1, which will not be described in detail here.

[0088] To summarize, the present application sets a groove 11 on the printed circuit board 1, sets the first gold finger 3 in the groove 11, sets the second gold finger 4 on the flexible circuit board 2 and corresponds to the first gold finger 3, and sets a pressing structure 5 on the printed circuit board 1 to press the second gold finger 4 against the first gold finger 3, so as to realize the connection between the flexible circuit board 2 and the printed circuit board 1. The first gold finger 3 and the second gold finger 4 will not be displaced due to heat during the connection process, the precision is high, the defective rate of the product is reduced, and the production cost is low.

[0089] In addition, a second conductor layer 15 is provided on the groove 11 of the printed circuit board 1, so that different first conductor layers 13 on the printed circuit board 1 can be connected to each other without drilling holes, thereby avoiding the influence of vias on signal transmission quality.

[0090] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and application concept of the present application, and all these changes or substitutions should fall within the protection scope of the claims attached to the present application.

Claims

1. A circuit board structure, characterized in that: include: A printed circuit board having a groove thereon; Flexible circuit boards; A first gold finger is disposed in the groove and does not protrude from the printed circuit board, and the first gold finger is electrically connected to the printed circuit board; A second gold finger is arranged on the flexible circuit board and is electrically connected to the flexible circuit board. The second gold finger protrudes from the flexible circuit board and is arranged corresponding to the first gold finger. A pressing structure is arranged on the printed circuit board, the pressing structure abuts against the flexible circuit board so that the second gold finger is connected to the first gold finger, and the pressing structure can be rotated to be spaced apart from the flexible circuit board.

2. The circuit board structure according to claim 1, characterized in that: The pressing structure comprises: A mounting seat, arranged on the printed circuit board; A shaft body, rotatably connected to the mounting seat; A pressing piece connected to the shaft, the pressing piece abuts against the flexible circuit board to press the second gold finger against the first gold finger, and the pressing piece can rotate with the shaft to release the connection with the flexible circuit board; The locking assembly can limit the rotation angle of the shaft body. When the locking assembly limits the shaft body, the pressing piece presses against the flexible circuit board.

3. The circuit board structure according to claim 2, characterized in that: The pressing piece includes a handle portion and a pressing portion, the shaft body is arranged above the groove, the handle portion and the pressing portion are respectively connected to the shaft body, the handle portion and the pressing portion are arranged at an angle, a pressing surface is formed on a side of the pressing portion away from the handle portion, and the pressing surface abuts against the flexible circuit board; The pressing surface is configured as an arc surface, and along the rotation direction of the pressing member when pressing the flexible circuit board, the distance between the pressing surface and the flexible circuit board gradually decreases.

4. The circuit board structure according to claim 2, characterized in that: The locking assembly includes a locking unit and an unlocking unit, wherein the locking unit is arranged on the shaft body, and the unlocking unit is arranged on the mounting seat. The locking unit can extend into the mounting seat to limit the rotation of the shaft body, and the unlocking unit can drive the locking unit to return to the shaft body to release the limiting position of the locking assembly on the shaft body.

5. The circuit board structure according to claim 4, characterized in that: The shaft body is provided with a first opening, and the locking unit is arranged in the first opening; A second opening is provided on the mounting seat, and the unlocking unit is provided in the second opening; The locking unit can extend into the second opening to limit the rotation of the shaft, and the unlocking unit can push the locking unit to return to the first opening to release the locking assembly from limiting the shaft.

6. The circuit board structure according to claim 5, characterized in that: The locking unit includes a first elastic member and a first limiting block, wherein the first elastic member is disposed in the first opening, the first limiting block is connected to one end of the first elastic member close to the opening of the first opening, and when the first opening corresponds to the second opening, the first elastic member can push the first limiting block to pass through the second opening; The unlocking unit includes a push rod, and the push rod includes an unlocking portion and a push rod portion, wherein the unlocking portion is arranged at one end of the push rod portion close to the first opening and can be connected to the first limit block; a second limit block is arranged in the second opening, and the second limit block is arranged at an interval from the unlocking portion and is distributed on a side of the unlocking portion away from the first opening, and the push rod portion is inserted into the second limit block; A second elastic member is disposed between the second limiting block and the unlocking portion. After the unlocking portion moves toward the first limiting block, the second elastic member can drive the unlocking portion to return to its original position.

7. The circuit board structure according to claim 1, characterized in that: A limit line is arranged on the flexible circuit board, the limit line is arranged on a side of the flexible circuit board facing away from the second gold finger, and the limit line is aligned with an edge of the printed circuit board close to the flexible circuit board.

8. The circuit board structure according to claim 1, characterized in that: The printed circuit board comprises a substrate layer, and a plurality of first conductor layers and a plurality of prepreg layers stacked on the substrate layer, wherein the first conductor layers and the prepreg layers are alternately arranged; or, The printed circuit board includes a substrate layer, a first conductor layer and a prepreg layer, wherein the first conductor layer and the prepreg layer are respectively configured in plurality, and the plurality of the first conductor layers and the plurality of the prepreg layers are respectively stacked on opposite sides of the substrate layer, and the first conductor layer and the prepreg layer are staggered.

9. The circuit board structure according to claim 8, characterized in that: A second conductor layer is arranged on the groove wall of the groove, and the second conductor layer is respectively connected to the first gold finger and the first conductor layer facing the groove and / or the surface of the printed circuit board; the groove is arranged between the substrate layer and the surface of the printed circuit board.

10. A display device, characterized in that: include: Display panel; The circuit board structure as described in any one of claims 1 to 9, wherein the flexible circuit board is electrically connected to the printed circuit board and the display panel respectively to realize driving of the display panel.

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