Circuit board fixing structure and display device

Abstract

The utility model discloses a circuit board fixing structure and a display device, and the circuit board fixing structure comprises a metal backboard which comprises a board body; the convex hull is arranged on the plate body, a first surface is formed at the top of the convex hull, a threaded hole reinforcing part is arranged on the first surface, and the reinforcing part protrudes outwards or is concaved inwards in the first surface; the circuit board is arranged on one side of the metal back, and fixing holes are formed in the circuit board; and the screw passes through the fixing hole and is in threaded connection with the threaded hole so as to fix the circuit board at the top of the convex hull. Therefore, according to the circuit board fixing structure provided by the embodiment of the invention, the reinforcing part is formed on the board body of the metal back board, so that the local strength of the board body is effectively improved. Even if a large locking torque is applied to the threaded hole, the plate body around the threaded hole can be kept stable and not prone to deformation, and then the reliability of the circuit board fixing structure is improved.

Description

[0001] This application claims priority to Chinese Patent Application No. 202422321155.7, filed on September 23, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of household appliances, and in particular to a circuit board fixing structure and a display device. BACKGROUND

[0003] The metal back plate is a commonly used component in the household appliance industry. The metal back plate is usually used to mount structural members or functional devices, and can provide structural support for the structural members or functional devices. For example, in a display device, threaded holes are usually provided in the metal back plate to mount a circuit board.

[0004] With the increasing demand for miniaturization and thinness of display devices, and the need to control production costs, the thickness of the metal back plate is also decreasing. When the fastener passes through the circuit board and is locked on the threaded hole of the metal back plate under the action of torque, the light and thin metal back plate causes the area around the threaded hole to deform. This deformation not only weakens the structural strength of the metal back plate, but also can affect the installation accuracy of the fastener, causing the fastener to be unable to be accurately and firmly fixed at the predetermined position, and even causing the fastener to fail to be installed, thereby affecting the overall performance and durability of the household appliance product. Utility Model Content

[0005] The present application discloses a circuit board fixing structure, which can improve the structural strength of the metal back plate in the area around the threaded hole, and improve the connection strength between the metal back plate and the screw, thereby ensuring the overall performance and durability of the circuit board fixing structure.

[0006] To achieve the above-mentioned purpose, in a first aspect, the present application discloses a circuit board fixing structure, comprising:

[0007] A metal back plate, the metal back plate comprising:

[0008] A plate body;

[0009] A convex hull, the convex hull being provided on the plate body, a top portion of the convex hull forming a first surface, the first surface being provided with:

[0010] A threaded hole;

[0011] A reinforcing portion, the reinforcing portion being convex outwardly or concave inwardly relative to the first surface;

[0012] A circuit board, provided on one side of the metal back plate, the circuit board being provided with a fixing hole;

[0013] Screws are passed through the mounting holes and threaded into the threaded holes to secure the circuit board to the top of the bump.

[0014] Thus, the circuit board fixing structure provided in this application effectively improves the local strength of the board body by forming a bulge and a reinforcing portion on the metal backplate. The bulge meets the installation gap requirements of the components to be installed, and the reinforcing portion undergoes work hardening of the local material at the top of the bulge through a stamping process, enhancing the hardness and strength of the top of the bulge. Simultaneously, a threaded hole is formed on the top of the bulge. Due to the enhanced hardness and strength of the top of the bulge, the strength of both the front and side surfaces of the threaded hole is improved, effectively enhancing the deformation resistance of the front and side surfaces of the threaded hole. Even when a large locking torque is applied to the threaded hole, the board body around the threaded hole remains stable and does not easily deform, thereby improving the reliability and durability of the circuit board fixing structure.

[0015] In some embodiments of this application, the reinforcing part is a reinforcing rib structure, and the reinforcing part is arranged axially around the threaded hole.

[0016] Thus, the reinforcing rib structure can be a structure formed by two stamping processes for the convex bulge. The structural strength of the reinforcing part is further improved. The reinforcing part is axially arranged around the threaded hole, which can ensure the structural strength of the plate around the threaded hole, so that the threaded hole has a stronger resistance to deformation during the screw fastening process.

[0017] In some embodiments of this application, the reinforcing part includes a first wall surface and a second wall surface that are radially spaced along the threaded hole. The first wall surface is closer to the threaded hole than the second wall surface, and the first wall surface and the second wall surface are curved surfaces.

[0018] Thus, by constructing the first and second walls as curved surfaces, compared to the straight reinforcing ribs of the reinforcement section, stress can be better dispersed. When a large torque is generated during the fastening process, the curved walls of the reinforcement section can disperse the stress over a wider area, reducing stress concentration and thereby improving the structural strength and durability of the plate and the area around the threaded holes.

[0019] In some embodiments of this application, the first wall surface and the second wall surface are respectively concentrically arranged with the center of the threaded hole.

[0020] In this way, the concentric arrangement of the center of the first wall, the center of the second wall, and the center of the threaded hole allows the reinforcing part and the flange to jointly bear the torque from multiple directions, effectively reducing stress concentration and making the plate around the threaded hole maintain higher rigidity and stability, thus reducing the risk of plate deformation.

[0021] In some embodiments of this application, the reinforcing part is an annular reinforcing rib, and the first wall surface and the second wall surface are cylindrical surfaces.

[0022] Thus, the annular reinforcing ribs have a continuous shape and extend circumferentially along the threaded hole. Therefore, the reinforcing part is equivalent to forming a structural reinforcement around the threaded hole, which can effectively disperse the stress concentration that may occur in the plate around the threaded hole, so that the plate around the threaded hole can maintain higher rigidity and lower deformation risk.

[0023] In some embodiments of this application, the reinforcing portion includes at least two first sub-reinforcing portions, which are spaced apart circumferentially along the threaded hole, and each first sub-reinforcing portion is arranged axially around the threaded hole.

[0024] Thus, the reinforcing portion includes at least two first sub-reinforcing portions, each of which extends circumferentially along the threaded hole. That is, the first sub-reinforcing portions can be part of a ring structure, and multiple first sub-reinforcing portions form a discontinuous ring structure surrounding the periphery of the threaded hole.

[0025] In some embodiments of this application, the first sub-reinforcing portion includes a sixth wall surface located at the circumferential end of the first sub-reinforcing portion and extending radially along the threaded hole. Thus, the first sub-reinforcing portion achieves work hardening and structural reinforcement in the radial direction of the threaded hole, enabling it to provide structural reinforcement in that direction.

[0026] In some embodiments of this application, each first sub-reinforcing part includes a first wall surface and a second wall surface, wherein the first wall surface and the second wall surface are arc surfaces.

[0027] Thus, the first sub-reinforcing part also includes a first wall surface and a second wall surface, which are both arc surfaces. This allows the reinforcing part to provide structural reinforcement to the circumferential direction of the threaded hole. In this way, the first sub-reinforcing part can simultaneously strengthen the radial and circumferential plate of the threaded hole, further improving the deformation resistance of the plate around the threaded hole when it is fastened with screws.

[0028] In some embodiments of this application, the diameter of the first wall is The diameter of the second wall is The inner diameter of the flange is M, where,

[0029] Thus, in This effectively limits the distance between the first wall surface and the threaded hole to a certain extent. An appropriate distance allows a certain transition area to be formed between the reinforcement and the threaded hole, so as to absorb and disperse the stress transmitted from the threaded hole or screw, and enable the reinforcement to better resist deformation.

[0030] In some embodiments, the first surface is a plane, and the reinforcement is located between the threaded hole and the edge of the first surface.

[0031] It can be understood that the first surface is a plane, and the connection between the first surface and the first sidewall can be the edge of the first surface. The reinforcing part 30 located between the threaded hole and the edge of the first surface can enhance the strength and hardness of the plate material around the threaded hole. The reinforcing part can effectively disperse the locking force from the screw. When the threaded hole is subjected to external locking force, the setting of the reinforcing part makes the plate material around the threaded hole less prone to deformation.

[0032] In some embodiments, the inner diameter of the threaded hole is M, the edge of the first surface includes a first edge; the distance between the center of the threaded hole and the first edge is L1, wherein L1 < 1.5M, and no reinforcing part is provided between the threaded hole and the first edge.

[0033] Thus, when the center of the threaded hole is too close to the first edge, a reinforcing part is not required between the threaded hole and the bulge. Since the bulge is also formed by a protrusion of part of the plate, the bulge has greater strength than the plate flat structure. Although no reinforcing part is required when the threaded hole is too close to the first edge, the bulge can still provide structural reinforcement to the threaded hole, making it less prone to deformation during the fastening process.

[0034] In some embodiments, the edge of the first surface includes a second edge, the distance L2 between the center of the threaded hole and the second edge is L2, wherein L2 > 1.5M, and the reinforcing part is located between the threaded hole and the second edge, wherein M is the inner diameter of the threaded hole.

[0035] Thus, with sufficient space between the second edge of the first surface and the center of the threaded hole, the reinforcing part can be continuously or intermittently disposed between the threaded hole and the first edge, depending on the actual situation and actual needs.

[0036] In some embodiments of this application, the inner diameter of the threaded hole is M; the distance between the center of the threaded hole and the edge of the first surface is L3; wherein, L3 > 1.5M.

[0037] Thus, the distance L3 between the center of the threaded hole and the first edge is greater than 1.5M, which allows space around the threaded hole to be provided with a reinforcing part, thereby ensuring that the threaded hole has a certain resistance to deformation during fastening.

[0038] In some embodiments of this application, the reinforcing portion includes at least two second sub-reinforcing portions, which surround the periphery of the threaded hole; the second sub-reinforcing portion includes a third wall surface located at the end of the second sub-reinforcing portion, and the third wall surface is radially inclined relative to the threaded hole.

[0039] In this way, relative to the third wall surface that is radially inclined along the threaded hole, stress can be effectively dispersed in multiple directions when the second sub-reinforcement is under stress, reducing local stress concentration in the second sub-reinforcement and ensuring the second sub-reinforcement's resistance to plastic deformation.

[0040] In some embodiments of this application, the third wall surface includes a first end and a second end. The first end of the third wall surface is closer to the threaded hole than the second end of the third wall surface. A first connecting line between the first end of the third wall surface and the center of the threaded hole forms a first included angle θ with the third wall surface, where θ satisfies: θ < 90° or θ > 0°.

[0041] Thus, θ < 90° or θ > 0° can further ensure that the third wall surface is not parallel or perpendicular to the rolling direction of the plate. This way, the tensile force that may be generated at the third wall surface will not be perpendicular or parallel to the rolling direction, allowing the third wall surface to form better tensile properties, thereby improving the structural strength of the second sub-reinforcement.

[0042] In some embodiments of this application, the third wall surface includes a first end and a second end, and the second sub-reinforcing part further includes a fourth wall surface connected to the first end of the third wall surface and a fifth wall surface connected to the second end of the third wall surface. The fourth wall surface and the fifth wall surface are curved surfaces, and the fourth wall surface and the fifth wall surface are respectively eccentrically disposed with respect to the center of the threaded hole.

[0043] Thus, the centers of the fourth and fifth walls are eccentrically positioned relative to the center of the threaded hole. This eccentric design allows each second sub-reinforcement to distribute stress more evenly around the threaded hole when subjected to torsion, helping to reduce stress concentration and lowering the likelihood of plate deformation around the threaded hole.

[0044] In some embodiments of this application, the reinforcing part includes a second surface facing the part to be installed, and there is a height difference H2 between the second surface and the first surface; the thickness of the plate is T; wherein, H2>1 / 4T, or H2<3T.

[0045] Thus, when H2 > 1 / 4T, sufficient work hardening can occur within the sheet metal forming the reinforcing section, ensuring an effective increase in the hardness and strength of the reinforcing section. This helps to disperse stress around the threaded holes, reduce stress concentration, and protect the sheet metal from deformation. Since the reinforcing section is formed by stamping the sheet metal, sufficient work hardening can be ensured when H2 < 3T, resulting in adequate structural strength.

[0046] In some embodiments of this application, the threaded hole is a flanged threaded hole, and a first thread is formed inside the flanged threaded hole. The first thread is used for threaded connection with a screw.

[0047] Thus, the threaded hole is a flanged threaded hole, and a first thread is formed inside the flange of the flanged threaded hole. This first thread can be threadedly connected with the screw, ensuring the connection strength between the threaded hole and the thread.

[0048] A second aspect of this application also provides a circuit board fixing structure, including:

[0049] Metal backplate, gold metal backplate includes:

[0050] plate body;

[0051] A convex hull is disposed on the plate body, and a first surface is formed on the top of the convex hull. The first surface is provided with:

[0052] The reinforcing part protrudes outward or is recessed inward from the first surface, and includes:

[0053] The second sidewall extends from the top in a direction toward or away from the plate.

[0054] The base is located at the end of the second sidewall opposite to the top;

[0055] A threaded hole is provided at the base;

[0056] The circuit board is located on one side of the metal back plate and has mounting holes.

[0057] Screws are passed through the mounting holes and threaded into the threaded holes to secure the circuit board to the top of the bump.

[0058] Thus, the circuit board fixing structure provided in this application effectively improves the local strength of the board body by forming a protrusion and a reinforcing portion on the metal back plate. The protrusion meets the installation gap requirements of the components to be installed, and the reinforcing portion undergoes work hardening of the local material of the board body through a stamping process, enhancing the hardness and strength of the reinforcing portion. Simultaneously, the threaded hole is located on the reinforcing portion at the top of the protrusion, thereby strengthening the strength and hardness of the board body around the threaded hole and effectively dispersing the locking force from the screw. Even when a large locking torque is applied to the threaded hole, the board body around the threaded hole remains stable and does not easily deform, ensuring the effectiveness of the connection between the screw and the threaded hole, and thus guaranteeing the structural performance and durability of the circuit board fixing structure.

[0059] In some embodiments of this application, the reinforcing part is a boss structure, the reinforcing part protrudes outward from the first surface along the first direction, the threaded hole is a flanged threaded hole, a first thread is formed in the flanged threaded hole, and the flange of the flanged threaded hole extends along the second direction, which is the opposite direction to the first direction.

[0060] In some embodiments of this application, the reinforcing part is a countersunk structure, and the reinforcing part is recessed into the first surface along the second direction; the threaded hole is a flanged threaded hole, and a first thread is formed in the flanged threaded hole, and the flange of the flanged threaded hole extends along the second direction, the first direction being the opposite direction to the second direction.

[0061] Thus, the concave-convex direction of the reinforcing part and the extension direction of the flange can be the same or different. Specifically, the direction of the stamped reinforcing part and the direction of the tapped threaded hole can be determined according to the actual installation situation, while the orientation of the flange can be flexibly adjusted according to design requirements, installation conditions and manufacturing process.

[0062] In some embodiments of this application, at least a portion of the flange of the flanged threaded hole can be inserted into the part to be installed.

[0063] This allows the orientation of the flange to be flexibly adjusted according to design requirements, installation conditions, and manufacturing processes, ensuring that the flange does not interfere with the part to be installed.

[0064] In some embodiments of this application, the first surface is configured as a circle with a diameter of The reinforcing part includes a second surface facing the part to be installed, and the diameter of the second surface of the reinforcing part is... in,

[0065] In this way, the reinforcing part will not exceed the boundary of the first surface of the convex hull, thus maintaining the compactness of the reinforcing part structure and the aesthetics of the convex hull.

[0066] In some embodiments of this application, the pitch of the first thread is L, and the extension length of the flange is H1, wherein H1 and L satisfy: H1>2L.

[0067] Thus, when H1>2L, a deeper embedding or engagement effect can be formed between the flange and the locking element, which increases the stress value of the flange and reduces stress concentration, thereby improving the reliability and durability of the screw-threaded hole connection.

[0068] In some embodiments of this application, the reinforcement is formed by stamping a convex hull; and / or

[0069] Threaded holes are formed by tapping the convex hull or reinforcing portion; and / or

[0070] The convex hull is formed by stamping the plate.

[0071] Thus, the processes of stamping and tapping for processing the sheet metal are mature and well controllable, and the above-mentioned processes can easily meet the design requirements of the reinforcing parts and threaded holes.

[0072] In some embodiments of this application, the thickness of the plate is T, where T satisfies: T < 0.8 mm.

[0073] A third aspect of this application also provides a display device, including:

[0074] Display screen;

[0075] The back cover is located on one side of the display screen;

[0076] As provided in the first or second aspect of this application, the metal backplate in the circuit board fixing structure is located between the display screen and the back cover.

[0077] Thus, due to the reduced thickness of the metal backplate and the reinforcement, the structural strength of the area around the threaded hole is ensured, and the flange of the threaded hole is also lengthened, ensuring the structural strength of the thin and light metal backplate during the fastening process. The metal backplate is not easily deformed, thereby enabling the display device using this metal backplate to achieve thinness and lightness while ensuring product reliability. Attached Figure Description

[0078] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0079] Figure 1 This is a schematic diagram of the structure of a display device provided in an embodiment of this application;

[0080] Figure 2 One of the schematic diagrams of the metal backplate in the circuit board fixing structure provided in the embodiments of this application;

[0081] Figure 3 A second schematic diagram of the metal backplate in the circuit board fixing structure provided in the embodiments of this application;

[0082] Figure 4 One of the structural schematic diagrams of the protrusion, reinforcing part and threaded hole in the circuit board fixing structure provided in the embodiment of this application;

[0083] Figure 5 A second schematic diagram of the protrusion, reinforcing part and threaded hole in the circuit board fixing structure provided in the embodiment of this application;

[0084] Figure 6 The third schematic diagram of the protrusion, reinforcement and threaded hole in the circuit board fixing structure provided in the embodiment of this application;

[0085] Figure 7 Fourth schematic diagram of the protrusion, reinforcement and threaded hole in the circuit board fixing structure provided in the embodiment of this application;

[0086] Figure 8 Fifth schematic diagram of the protrusion, reinforcement and threaded hole in the circuit board fixing structure provided in the embodiment of this application;

[0087] Figure 9Sixth schematic diagram of the protrusion, reinforcement and threaded hole in the circuit board fixing structure provided in the embodiments of this application;

[0088] Figure 10 Seventh schematic diagram of the protrusion, reinforcement and threaded hole in the circuit board fixing structure provided in the embodiment of this application;

[0089] Figure 11 Simulation diagram of the threaded hole in the metal backplate without reinforcement in the circuit board fixing structure provided in this application embodiment under a positive load of 200N;

[0090] Figure 12 Simulation diagram of the threaded hole in the metal backplate of the circuit board fixing structure provided in the embodiment of this application under a reverse load of 200N;

[0091] Figure 13 Simulation diagram of the threaded hole with reinforcement provided on the metal back plate in the circuit board fixing structure provided in the embodiment of this application under a positive load of 200N;

[0092] Figure 14 Simulation diagram of the threaded hole with reinforcement in the metal back plate of the circuit board fixing structure provided in the embodiment of this application under a positive load of 200N.

[0093] Explanation of reference numerals in the attached figures:

[0094] 1000 - Circuit board fixing structure; 100 - Metal back plate; 10 - Board body; 20 - Protrusion; 201 - First surface; 201a - First edge; 201b - Second edge; 204 - Top; 203 - First sidewall; 30 - Reinforcing part; 31 - Second sidewall; 32 - Base; 301 - Second surface; 303 - First wall surface; 304 - Second wall surface; 30a - First sub-reinforcing part; 30b - Second sub-reinforcing part; 305 - Third wall surface; 306 - Fourth wall surface; 307 - Fifth wall surface; 308 - Sixth wall surface; 40 - Threaded hole; 401 - Flanged edge; 400 - Circuit board; 2000 - Display device; 200 - Display screen; 300 - Back cover; 500 - Audio speaker. Detailed Implementation

[0095] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0096] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0097] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0098] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0099] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0100] Display devices typically include a display screen. A display screen is a device interface used to display visual content. This display screen can be a liquid crystal display (LCD), an organic light-emitting diode (OLED) display screen, or other screens with display functions.

[0101] The display device also includes a metal backplate, on which the display screen can be mounted, and the metal backplate provides structural support for the display screen. The metal backplate can be used as the backplate for the display device.

[0102] To ensure a secure installation, threaded holes may be provided on the metal backplate to mount the circuit board. When mounting the circuit board to the metal backplate, fasteners pass through the circuit board and are securely connected to the threaded holes to lock the circuit board to the metal backplate.

[0103] As the pursuit of increasingly thinner and lighter display devices continues, both the display screen and the metal backplate are being further reduced in thickness. When the thickness of the metal backplate is reduced to less than 0.8mm, the metal backplate around the threaded holes is prone to deformation during the process of fasteners securing the circuit board to the metal backplate. This reduces the installation strength of the metal backplate and may lead to insufficient strength of the fastening connection or even fastening connection failure.

[0104] Based on this, this application provides a circuit board fixing structure 1000 and a display device 2000 to solve the above problems.

[0105] It should be noted that the circuit board fixing structure 1000 provided in this application embodiment can be applied not only to display devices, but also to other household appliances that require miniaturization and thinning, such as refrigerators, washing machines, and air conditioners. Specifically, the metal back plate 100 in the circuit board fixing structure 1000 can serve as the cabinet of a refrigerator, the cabinet of a washing machine, or the housing of an air conditioner, etc.

[0106] This application discloses a circuit board fixing structure 1000, which can be applied to, for example... Figure 1 The display device shown is 2000. For example... Figure 1 As shown, the display device 2000 may include a display screen 200 and a rear cover 300. The rear cover 300 is located on one side of the display screen 200 and may be made of plastic material.

[0107] In some embodiments, the display device 2000 may include a circuit board fixing structure 1000 for fixing and mounting the circuit board 400 in the display device.

[0108] In some embodiments, such as Figure 1 As shown, the circuit board fixing structure 1000 may include a metal back plate 100, which can provide structural support for the display screen 200 or other structural components or functional devices.

[0109] In some embodiments, the circuit board fixing structure 1000 may include a circuit board 400. The circuit board 400 may be disposed on a metal backplate 100, which provides structural support for the circuit board 400.

[0110] In some embodiments, the circuit board 400 can be a PCB (Printed Circuit Board). Depending on the function performed by the circuit board, the circuit board 400 can be a motherboard, power board, driver board, or control board, etc.

[0111] In some embodiments, mounting holes may be formed on the circuit board 400 to allow screws to pass through the circuit board 400 and mount it to the board body 10.

[0112] In some embodiments, the circuit board 400 is located on one side of the metal backplate 100.

[0113] In some embodiments, the circuit board mounting structure 1000 may include screws. The screws can pass through mounting holes in the circuit board 400 and be mounted to the board body 10, thereby securing the circuit board 400 to the board body 10.

[0114] Optionally, the screw can be M2.5, M3, or M4, etc.

[0115] In some embodiments, the metal backplate 100 includes a plate body 10. The plate body 10 can be formed from metal materials such as aluminum alloy plate, honeycomb aluminum plate, or galvanized steel plate. Among them, galvanized steel plate has excellent structural strength, corrosion resistance, and easy processing. It can be processed into the required shape and structure through forming processes such as stamping, bending, punching, and welding to meet the diverse design needs of the metal backplate 100 as a backplate.

[0116] In some embodiments, the yield strength of the plate 10 is between 145 MPa and 180 MPa to ensure that the plate 10 has the ability to resist plastic deformation to meet practical needs. The plate 10 has the above-mentioned yield strength, which makes the metal backing plate 100 less prone to plastic deformation when subjected to external forces, thereby maintaining the stability and integrity of the plate 10.

[0117] In some embodiments, the thickness T of the plate 10 is less than 0.8 mm.

[0118] With a thickness T < 0.8 mm, the requirement for a thinner and lighter metal backplate 100 is not only met, but the production cost of the plate 10 is also reduced, and the plate 10 can have good heat dissipation performance.

[0119] It is understandable that if the thickness of the plate 10 is increased, such as T > 0.8 mm, the production cost of the plate 10 may increase accordingly. It may also prevent the metal back plate 100 from being made thinner and lighter, and may also affect the stamping effect of the plate 10.

[0120] For example, the thickness of the plate 10 can be 0.7mm, 0.6mm, 0.5mm, 0.4mm or 0.3mm.

[0121] In some embodiments, such as Figure 2 As shown, the metal backplate 100 may include a protrusion 20. The protrusion 20 is formed by machining a portion of the plate body 10.

[0122] The bump 20 can be constructed as a bump structure, protruding and bulging towards the circuit board 400. The bump 20 can be formed by stamping the board body 10.

[0123] The protrusion 20 is formed by stamping on the board 10. Firstly, it meets the actual mounting requirements of the circuit board 400. For example, the circuit board 400 may have many components, and a certain gap is needed between the circuit board 400 and the metal backplate 100 to accommodate these components. The protrusion 20, protruding towards the circuit board 400, allows the aforementioned gap to be formed between the board 10 and the circuit board 400, effectively providing space for the components on the circuit board 400. Secondly, stamping the board 10 to form the protrusion 20 causes work hardening of the internal structure of the board 10 in the area where the protrusion 20 is formed, effectively increasing the structural strength of the protrusion 20, i.e., the local area of ​​the board 10.

[0124] In some embodiments, such as Figure 3 As shown, the convex hull 20 may include a first sidewall 203. The first sidewall 203 is part of the plate body 10 and extends toward the circuit board 400.

[0125] In this way, the first sidewall 203 can create a height difference between the convex bulge 20 and the other flat structural parts of the plate 10.

[0126] Optionally, such as Figure 3 As shown, the first sidewall 203 can be an inclined sidewall. The inclined first sidewall 203 can better adapt to the spatial layout around the protrusion 20 and avoid interference with other components. In addition, in terms of processing technology, the inclined first sidewall 203 is also easier to stamp and form.

[0127] In some embodiments, such as Figure 3 As shown, the convex hull 20 may include a top 204. The top 204 is connected to one end of the first sidewall 203 near the circuit board 400.

[0128] like Figure 3 As shown, the surface of the top of the convex hull 20 facing the circuit board 400 is the first surface 201. Optionally, the outline of the first surface 201 can be circular. Alternatively, the outline of the first surface 201 can be set according to actual conditions, and this embodiment does not specifically limit it.

[0129] For example, the convex hull 20 can be a hollow flat-top structure that approximates a frustum, which makes the convex hull 20 easier to process, and the circular top 204 is also more advantageous in dispersing stress than other tops with edges.

[0130] In some embodiments, the first surface 201 can be a plane. A planar first surface 201 can facilitate bonding with the circuit board 400, thereby increasing the contact area with the circuit board 400, making the pressure distribution between the circuit board 400 and the first surface 201 more uniform, and reducing the risk of deformation or damage to the circuit board 400 caused by excessive local pressure on the circuit board 400 due to non-planar structures.

[0131] In some embodiments, such as Figure 3 As shown, the metal backing plate 100 may include a threaded hole 40. The threaded hole 40 is disposed on the top 204 of the convex hull, that is, the threaded hole 40 is disposed on the first surface 201. The threaded hole 40 may penetrate through the top 204 of the convex hull 20.

[0132] In some embodiments, the wall of the threaded hole 40 is formed with a flange 401 extending away from the reinforcing portion 30, that is, the threaded hole 40 is a flanged threaded hole. A first thread may be formed in the flanged threaded hole, which may be provided on the inner wall of the flange 401 so that the threaded hole 40 can be threadedly connected to a screw.

[0133] In some embodiments, such as Figure 3 As shown, the metal back plate 100 may include a reinforcing portion 30. The reinforcing portion 30 is disposed on the top 204 of the protrusion 20.

[0134] The reinforcing part 30 is formed by processing a portion of the plate 10 that forms the convex hull 20, and is located at the top 204 of the convex hull, such that the reinforcing part 30 is concave or convex on the first surface 201.

[0135] The reinforcing portion 30 can be formed on the top 204 of the protrusion 20 by stamping, so that the reinforcing portion 30 protrudes outward or is recessed inward on the first surface 201, that is, the reinforcing portion 30 is formed by processing the plate 10. During the process of stamping the protrusion 20 to obtain the reinforcing portion 30, the grains of the internal structure of the material of the plate 10 slip and rearrange, resulting in a change in the original grain structure, which enhances the strength and hardness of the material forming the reinforcing portion 30, thereby improving the stress performance of the reinforcing portion 30.

[0136] It is understood that the reinforcing part 30 can enhance the strength and hardness of the material of the top 204 of the protrusion 20. In this way, when the threaded hole 40 is subjected to the locking force, the reinforcing part 30 can effectively disperse the locking force from the screw. When the threaded hole 40 is subjected to the external locking force, the setting of the reinforcing part 30 makes the plate 10 around the threaded hole 40 less prone to deformation.

[0137] Figure 4 Image (a) shows a top view of a metal backplate 100 in one embodiment. Figure 4 (b) shows a cross-sectional view of a metal backplate 100 in one embodiment; Figure 5Image (a) shows a top view of the metal backplate 100 in yet another embodiment. Figure 5 (b) shows a cross-sectional view of the metal backplate 100 in yet another embodiment; Figure 6 Image (a) shows a top view of the metal backplate 100 in another embodiment. Figure 6 (b) shows a cross-sectional view of the metal backplate 100 in another embodiment.

[0138] like Figures 4 to 6 As shown, the threaded hole 40 can be formed on the top 204 of the protrusion 20. When machining the threaded hole 40, a pre-punched hole can be formed on the top 204 of the protrusion 20. Since the hardness and strength of the reinforcing part 30 provided on the periphery of the threaded hole 40 are improved, even if the pre-punched hole is small, the top 204 of the protrusion 20 can maintain good stability during the tapping process and is not prone to deformation or breakage. This makes a smaller pre-punched hole possible. Based on the principle of constant tapping volume, a smaller pre-punched hole helps to extend the length of the flange 401 formed by tapping the pre-punched hole.

[0139] It is understandable that when the length of the flange 401 is increased, the locking ability between the flange 401 and the screw is further strengthened. This also strengthens the lateral strength of the threaded hole 40, increasing the lateral stress value of the threaded hole 40. Thus, both the frontal and lateral strength of the threaded hole 40 are effectively improved. Even when the screw is fastened to the threaded hole 40 under a large torque, the plate 10 surrounding the threaded hole 40 is not easily deformed, and the locking strength of the threaded hole 40 is also improved.

[0140] In some embodiments, the diameter of the pre-punched hole may be less than 0.8 mm in order to extend the extension length of the flange 401 formed by tapping as much as possible.

[0141] In some embodiments, the threaded hole 40 formed by tapping the pre-punched hole can be of type M2.5, M3, or M4, etc.

[0142] Optionally, the threaded hole 40 can be formed by tapping the first surface 201 of the top 204 of the protrusion 20 in a second direction, and the tapped flange 401 extends in the second direction and is located in the cavity formed by the protrusion 20.

[0143] It is understandable that the convex bulge 20, the reinforcing part 30 and the threaded hole 40 are all formed by processing the plate body 10, and are an integral structure integrated with the plate body 10.

[0144] Alternatively, the threaded hole 40 can also be formed by tapping a third surface of the top 204 of the protrusion 20 in a first direction, the third surface being opposite to the first surface 201. The tapped flange 401 extends in the first direction and can extend into a through hole in the circuit board 400.

[0145] The first direction can be towards the circuit board 400, and the second direction can be away from the circuit board 400.

[0146] Thus, the circuit board fixing structure 1000 provided in this application embodiment effectively improves the local strength of the board body 10 by forming a protrusion 20 and a reinforcing portion 30 on the board body 10 of the metal back plate 100. The protrusion 20 meets the mounting gap requirements of the circuit board 400, and the reinforcing portion 30, formed by the stamping process, causes local material work hardening of the board body 10, enhancing the hardness and strength of the reinforcing portion 30. At the same time, the reinforcing portion 30 can enhance the strength and hardness of the board body 10 around the threaded hole 40, effectively dispersing the locking force from the screw. Even when a large locking torque is applied to the screw, the board body 10 around the threaded hole 40 can remain stable and not easily deformed, thereby improving the reliability of the threaded hole 40, ensuring the effectiveness of the connection between the screw and the threaded hole 40, and thus improving the structural performance and durability of the circuit board fixing structure 1000.

[0147] In some embodiments, the reinforcement 30 is located between the threaded hole 40 and the edge of the first surface 201. This allows the reinforcement 30 to be positioned as close as possible to the periphery of the threaded hole 40.

[0148] The edge of the first surface 201 can be the outline formed at the connection between the top 204 of the convex hull 20 and the first sidewall 203.

[0149] It is understood that the reinforcing part 30 located between the edge of the threaded hole 40 and the first surface 201 can enhance the strength and hardness of the plate 10 material around the threaded hole 40. The reinforcing part 30 can effectively disperse the locking force from the screw. When the threaded hole 40 is subjected to external locking force, the setting of the reinforcing part 30 makes the plate 10 around the threaded hole 40 less prone to deformation.

[0150] In some embodiments, the reinforcing portion may be continuously disposed between the edge of the threaded hole 40 and the first surface 201, or the reinforcing portion may be disposed at intervals between the edge of the threaded hole 40 and the first surface 201 along the circumference of the threaded hole 40 or around the axial direction of the threaded hole.

[0151] In some embodiments, such as Figures 3 to 6 As shown, the reinforcing part 30 can be arranged along the circumference of the threaded hole 40, that is, at least a portion of the reinforcing part 30 surrounds the outer periphery of the threaded hole 40.

[0152] Optionally, the extension direction of the reinforcing part 30 can be adapted to the contour of the threaded hole 40, and at least a portion of the reinforcing part 30 can extend along the circumference, that is, the reinforcing part 30 can be a curved structure.

[0153] Compared to straight-bar reinforcing structures, the reinforcing portion 30, which is arranged circumferentially along the threaded hole, can better disperse stress. When a large torque is generated during the fastening process, the bending structure of the reinforcing portion 30 can disperse the stress over a wider area, reducing stress concentration and thus improving the structural strength and durability of the plate 10 and the area around the threaded hole 40.

[0154] For example, the reinforcing part 30 may be an annular or near-annular structure, so that the reinforcing part 30 is disposed along the circumference of the threaded hole 40.

[0155] In some embodiments, Figure 4 (a) and (b) in Figure 5 (a) and (b) in Figure 6 As shown in (a) and (b), the reinforcing part 30 is constructed as a reinforcing rib structure.

[0156] Specifically, the reinforcing rib structure can be a structure formed by two stamping processes of the protrusion 20. For example, firstly, the top 204 of the protrusion 20 is stamped to form a boss structure on the top 204. Then, within the area of ​​the first stamping, a second stamping is performed in the opposite direction with a smaller area to further work harden this portion of the plate 10. In this way, a reinforcing rib structure can be formed on the top 204 of the protrusion 20 to form the aforementioned reinforcing portion 30.

[0157] It should be noted that by stamping the top 204 of the convex bulge 20 twice, the range of work hardening of the internal structure of the reinforcing part 30 is further increased, and the degree of work hardening of the reinforcing part 30 is deepened, thereby giving the reinforcing part 30 higher hardness and strength, and thus giving the plate 10 around the threaded hole 40 better resistance to plastic deformation.

[0158] In some embodiments, the reinforcing portion 30 is arranged axially around the threaded hole. It can be understood that since the reinforcing portion 30 is a stamped reinforcing rib structure, the reinforcing portion 30 has a certain length along the axial direction of the threaded hole 40. The axial arrangement of the reinforcing portion 30 around the threaded hole can further ensure the stability of the threaded hole 40, reduce the axial deformation of the threaded hole during screw installation or removal, and improve the service life and reliability of the threaded hole 40.

[0159] In some embodiments, the reinforcing portion 30 may be recessed into the first surface 201. This allows the first surface 201, with its larger surface area, to abut against the circuit board 400, increasing the contact area between the circuit board 400 and the first surface 201, thereby increasing friction.

[0160] In some embodiments, such as Figure 4 As shown in (a), the reinforcement 30 includes a first wall surface 303 and a second wall surface 304 radially spaced along the threaded hole 40. The first wall surface 303 is closer to the threaded hole 40 than the second wall surface 304. At least one of the first wall surface 303 and the second wall surface 304 is a curved surface.

[0161] By constructing the first wall surface 303 and / or the second wall surface 304 as curved surfaces, the reinforcing part 30 can better fit the contour shape of the threaded hole 40, allowing the reinforcing part 30 to be arranged circumferentially along the threaded hole 40. Furthermore, having at least one of the first wall surface 303 and the second wall surface 304 as a curved surface, compared to the reinforcing part 30 being constructed as a straight reinforcing rib, can better disperse stress. When a large torque is generated during the fastening process, the curved wall surface of the reinforcing part 30 can disperse stress over a wider area, reducing stress concentration and thereby improving the structural strength and durability of the plate 10 and the area around the threaded hole 40.

[0162] Optionally, the surface can be an arc surface, a cylindrical surface, etc., so that the first wall surface 303 and / or the second wall surface 304 can be adapted to the contour of the threaded hole 40.

[0163] In some embodiments, such as Figure 4 As shown in (a), both the first wall surface 303 and the second wall surface 304 are curved surfaces, and the first wall surface 303 and the second wall surface 304 are concentrically arranged around the center of the threaded hole 40. The first wall surface 303 is curved and can have a center. Similarly, the curved second wall surface 304 also has a center. The concentric arrangement of the center of the first wall surface 303, the center of the second wall surface 304, and the center of the threaded hole 40 allows the reinforcing part 30 and the threaded hole 40 to jointly bear the torsional forces from multiple directions, effectively reducing stress concentration and maintaining higher rigidity and stability of the plate 10 around the threaded hole 40, thus reducing the risk of deformation of the plate 10.

[0164] Furthermore, the concentric arrangement of the center of the first wall surface 303, the center of the second wall surface 304, and the center of the threaded hole 40 ensures the structural symmetry of the reinforcing part 30, thereby improving the stability and reliability of the reinforcing part 30.

[0165] In some embodiments, such as Figure 4As shown in (a), the reinforcing part 30 is constructed as a ring-shaped reinforcing rib structure. The ring-shaped reinforcing rib has a continuous shape and extends circumferentially along the threaded hole 40. Therefore, the reinforcing part 30 is equivalent to forming an all-round structural reinforcement in the circumferential direction of the threaded hole 40, so as to effectively disperse the stress concentration that may occur in the plate 10 around the threaded hole 40, and enable the plate 10 in the circumferential direction of the threaded hole 40 to maintain higher rigidity.

[0166] In some embodiments, the first wall surface 303 and the second wall surface 304 may be cylindrical surfaces to accommodate the annular rib structure of the reinforcing part 30.

[0167] In some embodiments, such as Figure 4 As shown in (a), the inner diameter of the threaded hole 40 can be M, and the distance L3 between the center of the threaded hole 40 and the edge of the first surface 201; wherein, L3 > 1.5M.

[0168] The first surface 201 can have a circular outline. The distance between the center of the threaded hole 40 and the edge of the first surface 201 is L3, and L3 > 1.5M, so that there is enough space between the threaded hole 40 and the edge of the first surface 201 to set the reinforcing part 30.

[0169] In some embodiments, the center of the threaded hole 40 and the center of the first surface 201 of the convex hull 20 can be concentrically arranged. This allows the distance from the center of the threaded hole 40 to the edge of the first surface 201 to be L3. This ensures that the locking force generated on the threaded hole 40 is evenly distributed, reducing the occurrence of localized stress concentrations.

[0170] In some embodiments, such as Figure 5 As shown in (a), the reinforcing part 30 includes at least two first sub-reinforcing parts 30a. Each first sub-reinforcing part 30a is arranged axially around the threaded hole 40. The at least two first sub-reinforcing parts 30a are arranged circumferentially spaced along the threaded hole 40.

[0171] like Figure 5 As shown, the reinforcing part 30 includes at least two first sub-reinforcing parts 30a, each of which extends circumferentially along the threaded hole 40. That is, the first sub-reinforcing parts 30a can be part of an annular structure, and a plurality of first sub-reinforcing parts 30a form a discontinuous annular structure and surround the periphery of the threaded hole 40.

[0172] Each first sub-reinforcing part 30a can be arranged around the axial direction of the threaded hole 40, or it can be understood that each first sub-reinforcing part 30a is arranged on the outer periphery of the threaded hole 40.

[0173] In some embodiments, such as Figure 5As shown in (a), the first sub-reinforcement 30a includes a sixth wall surface 308. The sixth wall surface 308 is located at the circumferential end of the first sub-reinforcement 30a. The sixth wall surface 308 extends radially along the threaded hole 40.

[0174] The sixth wall surface 308 at both ends of the first sub-reinforcing portion 30a along the circumference of the threaded hole 40 can extend radially along the threaded hole 40, or approach the radial extension of the threaded hole 40. In this way, the first sub-reinforcing portion 30a is equivalent to forming work hardening and structural reinforcement in the radial direction of the threaded hole 40, so that the first sub-reinforcing portion 30a can achieve structural reinforcement in the radial direction of the threaded hole 40.

[0175] In some embodiments, each first sub-reinforcing part 30a includes a first wall surface 303 and a second wall surface 304, wherein the first wall surface 303 and the second wall surface 304 are arc surfaces.

[0176] Meanwhile, the first sub-reinforcing part 30a also includes a first wall surface 303 and a second wall surface 304, both of which are arc surfaces, enabling the reinforcing part 30 to provide structural reinforcement to the threaded hole 40 in the circumferential direction. In this way, the first sub-reinforcing part 30a can simultaneously strengthen the threaded hole 40 in both the radial and circumferential directions, further improving the deformation resistance of the plate 10 surrounding the threaded hole 40 when it is fastened with screws.

[0177] In some embodiments, such as Figure 4 (b) and Figure 5 As shown in (b), the diameter of the first wall 303 is The diameter of the second wall surface 304 is The inner diameter of the 401 flange is M, where,

[0178] exist At this time, it is equivalent to limiting the distance between the first wall surface 303 and the threaded hole 40 to a certain extent. The appropriate distance allows a certain transition area to be formed between the reinforcing part 30 and the threaded hole 40, so as to absorb and disperse the stress transmitted from the threaded hole 40, and enable the reinforcing part 30 to better resist deformation.

[0179] If the above spacing is too small, such as In some cases, insufficient spacing may be required between the first wall surface 303 of the reinforcing part 30 and the threaded hole 40. The first wall surface 303 may be in close contact with the edge of the threaded hole 40, which will cause stress to be highly concentrated at the contact point and reduce the ability of the reinforcing part 30 to resist plastic deformation.

[0180] This enables the reinforcing part 30 or the first sub-reinforcing part 30a to form the aforementioned annular reinforcing rib structure or a partially annular reinforcing rib structure.

[0181] In some embodiments, due to the space limitations of the convex bulge 20 and the opening position requirements of the threaded hole 40, the threaded hole 40 may be too close to the edge of the first surface 201, making it impossible to provide a complete reinforcing part 30 between the threaded hole 40 and the edge of the first surface 201. In such cases, a partial reinforcing part 30 may be provided according to the actual situation.

[0182] Specifically, the distance between the edge of the first surface 201 and the center of the threaded hole 40 is L1. When L1 < 1.2M, it indicates that the threaded hole 40 is relatively close to a portion of the edge of the first surface 201 of the protrusion 20. In this case, part of the reinforcing portion 30 can be removed in the region where the threaded hole 40 is relatively close to the edge of the first surface 201, while part of the reinforcing portion 30 can be retained in the region where L1 > 1.2M. At this time, the portion without the reinforcing portion 30 can be structurally reinforced by the protrusion 20 formed by stamping the plate 10 and undergoing structural hardening.

[0183] In some embodiments, such as Figure 7 As shown, the edge of the first surface 201 may include a first edge 201a.

[0184] For example, the first edge 201a can be a straight line structure or a curved structure, and the embodiments of this application do not specifically limit it.

[0185] like Figure 7 As shown, depending on the installation position of the circuit board 400, the threaded hole 40 can be eccentrically set on the first surface 201, so that the distance between the center of the threaded hole 40 and the first edge 201a may be relatively close.

[0186] Specifically, the inner diameter of the threaded hole 40 can be M, and the distance from the center of the threaded hole 40 to the first edge 201a is L1, where L1 < 1.5M. When the first edge 201a is an irregular line, the distance from the center of the threaded hole 40 to the first edge 201a can be understood as the maximum distance between the center of the threaded hole 40 and the first edge 201a.

[0187] When L1 < 1.5M, since the first edge 201a is too close to the outer periphery of the threaded hole 40, there may not be enough space between the first edge 201a of the top 204 of the protrusion 20 and the outer periphery of the threaded hole 40 to provide a reinforcing part 30. However, it should be noted that although no reinforcing part 30 is provided between the outer periphery of the threaded hole 40 and the first edge 201a, since the protrusion 20 is also a reinforcing structure forming the plate 10 and the first edge 201a of the top 204 of the protrusion 20 is relatively close to the threaded hole 40, the first edge 201a of the protrusion 20 can also provide structural reinforcement for the threaded hole 40 to improve the deformation resistance of the threaded hole 40.

[0188] In some embodiments, the edge of the first surface 201 may include a second edge 201b. The second edge 201b may be a straight structure or a curved structure, and this application embodiment does not specifically limit it.

[0189] The distance L3 between the center of the threaded hole 40 and the second edge 201b is given by L2 > 1.5M. When the second edge 201b is an irregular line, the distance between the center of the threaded hole 40 and the second edge 201b can be understood as the minimum distance between them.

[0190] In some embodiments, such as Figure 7 As shown, the second edge 201b can be connected to the first edge 201a. The distance from the center of the threaded hole 40 to the first edge 201a and the second edge 201b can be different.

[0191] Since L2 > 1.5M, there is sufficient space between the second edge 201b and the outer periphery of the threaded hole 40. Even without a reinforcing portion 30 in the area between the first edge 201a and the threaded hole 40, a reinforcing portion 30 can be provided between the threaded hole 40 and the second edge 201b of the top 204 of the bulge 20. In other words, the reinforcing portion 30, partially located on the outer periphery of the threaded hole 40, and the second edge 201b of the bulge 20 can jointly provide structural reinforcement to the threaded hole 40.

[0192] In some embodiments, the reinforcing portion 30 may be continuously disposed between the outer periphery of the threaded hole 40 and the second edge 201b, or it may be intermittently disposed between the outer periphery of the threaded hole 40 and the second edge 201b along the periphery of the threaded hole 40.

[0193] In some embodiments, such as Figure 6As shown in (a), the reinforcing portion 30 may include at least two second sub-reinforcing portions 30b, which surround the periphery of the threaded hole 40. The at least two second sub-reinforcing portions 30b surrounding the periphery of the threaded hole 40 form a structural reinforcement of the plate 10 in the region surrounding the threaded hole 40.

[0194] In some embodiments, the second sub-reinforcing portion 30b includes a third wall surface 305 located at the end of the second sub-reinforcing portion 30b, and the third wall surface 305 is radially inclined relative to the threaded hole 40.

[0195] The third wall surface 305, which is radially inclined relative to the threaded hole 40, can effectively disperse stress in multiple directions when the second sub-reinforcement 30b is under stress, thereby reducing local stress concentration in the second sub-reinforcement 30b and ensuring the resistance of the second sub-reinforcement 30b to plastic deformation.

[0196] It should be noted that the plate 10 has a rolling direction during the processing and forming process. The rolling direction refers to the direction of metal grain flow when the plate passes through the rolling mill during the manufacturing process of the plate 10, which determines the grain arrangement and texture direction inside the plate 10. The radially inclined arrangement of the third wall surface 305 relative to the threaded hole 40 allows the third wall surface 305 to no longer be perpendicular or parallel to the rolling direction of the plate 10, but to form an angle with the rolling direction, so that the third wall surface 305 and the second sub-reinforcing part 30b have better tensile strength.

[0197] In some embodiments, the third wall surface 305 includes a first end and a second end. The first end of the third wall surface 305 is closer to the threaded hole 40 than the second end of the third wall surface 305. A first connecting line oa between the first end a of the third wall surface 305 and the center o of the threaded hole 40 forms a first included angle θ with the third wall surface 305, where θ satisfies: θ < 90° or θ > 0°.

[0198] θ < 90° or θ > 0° can further ensure that the third wall 305 is parallel or perpendicular to the rolling direction of the plate 10. In this way, the tensile external force that may be generated at the third wall 305 will not be perpendicular or parallel to the rolling direction, so that the third wall 305 can form better tensile properties, thereby improving the structural strength of the second sub-reinforcing part 30b.

[0199] In some embodiments, the third wall surface 305 includes a first end and a second end. The second sub-reinforcement 30b may include a fourth wall surface 306 connected to the first end of the third wall surface 305, and a fifth wall surface 307 connected to the second end of the third wall surface 305.

[0200] In some embodiments, the fourth wall surface 306 and the fifth wall surface 307 are curved surfaces. The function of the fourth wall surface 306 and the fifth wall surface 307 being curved surfaces is the same as the function of the first wall surface 303 and the second wall surface 304 being curved surfaces, and will not be described again here.

[0201] In some embodiments, the center of the fourth wall surface 306 and the center of the fifth wall surface 307 are eccentrically positioned relative to the center of the threaded hole 40. This eccentric design allows each second sub-reinforcement 30b to distribute stress more evenly around the threaded hole 40 when subjected to torque, helping to reduce stress concentration and lowering the likelihood of deformation of the plate 10 around the threaded hole 40.

[0202] In some embodiments, such as Figures 4 to 6 As shown, the reinforcing part 30 includes a second surface 301 facing the circuit board 400. There is a height difference H2 between the second surface 301 and the first surface 201 of the protrusion 20. The thickness of the plate 10 is T. H2 and T satisfy: H2>1 / 4T or H2<3T.

[0203] When H2>1 / 4T, sufficient work hardening can be achieved in the structure within the plate 10 forming the reinforcing part 30, ensuring that the hardness and strength of the reinforcing part 30 are effectively improved, which helps to disperse the stress around the threaded hole 40, reduce stress concentration, and protect the plate 10 from deformation.

[0204] If the height of H2 is too small, for example, H2 < 1 / 4T, the work hardening effect during the stamping process may not be significant enough. That is, during the stamping process to form the reinforcing part 30, the grain change and dislocation density increase of the internal structure of the plate 10 are insufficient, which cannot fully improve the hardness and strength of the reinforcing part 30. Consequently, when the screw is locked in the threaded hole 40, the plate 10 around the threaded hole 40 may easily deform.

[0205] The reinforcing part 30 is formed by stamping the plate 10. When H2 < 3T, the reinforcing part 30 can be fully work hardened to have sufficient structural strength.

[0206] While appropriately increasing H2 can improve the hardening effect and structural strength of the reinforcing part 30 to some extent, an excessively high H2 may also lead to increased stress concentration. If the height of H2 is too large, for example, H2 > 3T, excessive stress concentration will occur at the connection between the reinforcing part 30 and the plate 10, which will reduce the structural strength of the reinforcing part 30.

[0207] Specifically, H2 can be any value from 1 / 4T to 3T.

[0208] This application embodiment also provides a circuit board fixing structure 1000, such asFigures 8 to 10 As shown, the circuit board fixing structure 1000 includes the circuit board 400 and screws described in any of the above embodiments. Further details regarding the circuit board 400 and screws are omitted here.

[0209] In this embodiment, the metal back plate 100 may include a plate body 10 and a protrusion 20. The material, function and setting position of the plate body 10 and the protrusion 20 are the same as those of the metal back plate 100 in the above embodiment, and will not be repeated here.

[0210] In this embodiment, such as Figure 8 (a) Figure 9 (a) and Figure 10 As shown in (a), the reinforcing part 30 is disposed on the top 204 of the convex hull 20. The reinforcing part 30 may protrude outward or be recessed inward on the first surface 201.

[0211] Specifically, the reinforcing portion 30 can be formed on the top 204 of the protrusion 20 by stamping, so that the reinforcing portion 30 protrudes outward or is recessed inward on the first surface 201, that is, the reinforcing portion 30 is formed by processing the plate 10. During the process of stamping the protrusion 20 to obtain the reinforcing portion 30, the grains of the material internal structure of the plate 10 slip and rearrange, resulting in a change in the original grain structure, which enhances the strength and hardness of the material forming the reinforcing portion 30, thereby improving the stress performance of the reinforcing portion 30.

[0212] In some embodiments, such as Figure 8 (b) Figure 9 (b) and Figure 10 As shown in (b), the reinforcement 30 may include a second sidewall 31. The second sidewall 31 extends from the top 204 toward or away from the circuit board 400, that is, the second sidewall 31 extends axially along the threaded hole 40, so that the reinforcement 30 protrudes outward or is recessed inward at the top 204 of the protrusion 20.

[0213] In some embodiments, such as Figure 8 (b) Figure 9 (b) and Figure 10 As shown in (b), the reinforcing portion 30 may include a base 32. The base 32 is connected to the second sidewall 31 and is disposed at one end of the second sidewall 31 away from the top 204.

[0214] In some embodiments, the base 32 can be circular, elliptical, or quadrilateral, etc., and this embodiment does not limit this.

[0215] In some embodiments, such as Figures 8 to 10 As shown, the metal back plate 100 may include a threaded hole 40, which is disposed in the base 32 and extends through the base 32.

[0216] It should be noted that since the reinforcing part 30 is formed by stamping the plate 10, the material strength and hardness of the reinforcing part 30 are further enhanced. The threaded hole 40 is located at the base of the reinforcing part 30. The reinforcing part 30 makes the plate 10 around the threaded hole 40 more robust, capable of withstanding greater stress and deformation, thus improving the frontal strength of the threaded hole 40; that is, the structural strength of the material in the area surrounding the threaded hole 40 is improved. During the screw fastening process to the threaded hole 40, the plate 10 in the area surrounding the threaded hole 40 is less prone to deformation, thereby ensuring the effectiveness and strength of the fastening connection between the threaded hole 40 and the screw.

[0217] In some embodiments, Figure 8 Image (a) shows a top view of a metal backplate 100 in one embodiment. Figure 8 (b) shows a cross-sectional view of a metal backplate 100 in one embodiment; Figure 9 Image (a) shows a top view of the metal backplate 100 in yet another embodiment. Figure 9 (b) shows a cross-sectional view of the metal backplate 100 in yet another embodiment; Figure 10 Image (a) shows a top view of the metal backplate 100 in another embodiment. Figure 10 Image (b) shows a cross-sectional view of the metal backplate 100 in another embodiment. Figure 8 (b) Figure 9 (b) and Figure 10 As shown in (b), the wall of the threaded hole 40 is formed with a flange 401 extending away from the reinforcing part 30, and the inner wall of the flange 401 is formed with a first thread.

[0218] The threaded hole 40 can be formed in the reinforcing part 30 through a tapping process. When machining the threaded hole 40, a pre-punched hole can be formed on the reinforcing part 30 first. Since the hardness and strength of the reinforcing part 30 are improved, even if the pre-punched hole is small, the reinforcing part 30 can maintain good stability during the tapping process and is not prone to deformation or breakage. This makes it possible to have a smaller pre-punched hole. Based on the principle that the tapping forming volume remains constant, a smaller pre-punched hole helps to extend the length of the flange 401 formed by tapping the pre-punched hole.

[0219] It is understood that a first thread is formed within the flange 401, which is used to form a threaded connection with the screw. When the length of the flange 401 is increased, the locking ability between the flange 401 and the screw is further strengthened. Thus, the lateral strength of the threaded hole 40 is also strengthened, increasing the lateral force value of the threaded hole 40. In this way, both the frontal and lateral strength of the threaded hole 40 are effectively improved. Even when the screw is locked into the threaded hole 40 under a large torque, the plate 10 surrounding the threaded hole 40 is not easily deformed, and the locking strength of the threaded hole 40 is also improved.

[0220] In some embodiments, the diameter of the pre-punched hole may be less than 0.8 mm in order to extend the extension length of the flange 401 formed by tapping as much as possible.

[0221] In some embodiments, the threaded hole 40 formed by tapping the pre-punched hole can be of type M2.5, M3, or M4, etc.

[0222] In some embodiments, the extension length of the flange 401 can be H1, and the pitch of the first thread can be L. Due to the reduction in pre-punching, the extension length of the flange 401 can be longer, achieving H1>2L.

[0223] It should be noted that when H1>2L, the flange 401 and the locking element can form a deeper embedding or engagement effect, which increases the stress value of the flange 401 and reduces stress concentration, thereby improving the reliability and durability of the connection between the screw and the threaded hole 40.

[0224] If the extension length of the flange 401 is too small, for example, H1 < 2L, it may reduce the contact area between the flange 401 and the screw, resulting in concentrated pressure during fastening, which may easily cause local deformation of the flange 401, thereby reducing the reliability of the connection between the screw and the threaded hole 40.

[0225] It should be noted that in the manufacturing process of the metal back plate 100, threaded holes 40 can be formed by tapping on the protrusion 20 first, and then the plate 10 in the area surrounding the threaded holes 40 can be stamped to form a reinforcing part 30 in the area surrounding the threaded holes 40. Alternatively, the reinforcing part 30 can be formed by stamping on the protrusion 20 first, and then threaded holes 40 can be formed by tapping on the reinforcing part 30 to ensure that the threaded holes 40 can withstand greater locking forces. The embodiments of this application do not limit the above process steps.

[0226] Thus, the metal backplate 100 provided in this embodiment effectively improves the local strength of the plate 10 by forming a protrusion 20 and a reinforcing portion 30 on the plate 10. The protrusion 20 meets the mounting gap requirements of the circuit board 400, and the reinforcing portion 30 undergoes work hardening of the local material of the plate 10 through a stamping process, enhancing the hardness and strength of the reinforcing portion 30. Simultaneously, the threaded hole 40 is formed on the reinforcing portion 30, thus improving the strength of both the front and side surfaces of the threaded hole 40, effectively enhancing its resistance to deformation. Even when a large locking torque is applied to the threaded hole 40, the plate 10 around the threaded hole 40 remains stable and does not easily deform, thereby improving the reliability of the metal backplate 100 and ensuring the effectiveness and durability of the connection between the screw and the threaded hole 40.

[0227] In some embodiments, the reinforcing portion 30 is a boss structure. The reinforcing portion 30 may protrude outward from the first surface 201 along a first direction, or it may be recessed inward from the first surface 201 along a second direction. The first and second directions may be directions perpendicular to the plate 10, with the first direction being opposite to the second direction.

[0228] It is understandable that regardless of whether the reinforcing part 30 protrudes outward in the first direction or is recessed in the second direction, the purpose of stamping to form the reinforcing part 30 is to enhance the strength of the reinforcing part 30 by changing the local grain distribution of the material of the plate 10. Stamping the plate 10 along the first direction or along the second direction has a similar effect on improving the structural strength of the reinforcing part 30.

[0229] In some embodiments, the flange 401 may extend along a first direction or along a second aspect.

[0230] The concave-convex direction of the reinforcing part 30 and the extension direction of the flange 401 can be the same or different. Specifically, the direction of the stamped reinforcing part 30 and the direction of the tapped threaded hole 40 can be determined according to the actual installation situation.

[0231] For example, the reinforcing portion 30 may protrude outward from the first surface 201 along a first direction. In this way, the reinforcing portion 30 is used to abut against the circuit board 400. The flange 401 may extend along the first direction and pass through a through hole in the circuit board 400.

[0232] For example, such as Figure 8 (a) and Figure 8 As shown in (b), the reinforcing portion 30 can be recessed into the first surface 201 along the second direction. The reinforcing portion 30 can be a countersunk structure. The flange 401 extends along the second direction and extends into the cavity formed by the protrusion 20.

[0233] For example, such as Figure 9 (a) and Figure 9As shown in (b), the reinforcing portion 30 can be recessed into the first surface 201 along the second direction. The reinforcing portion 30 can be a countersunk structure. In this way, the protrusion 20 can abut against the circuit board 400. The flange 401 can extend along the first direction and pass through the through hole of the circuit board 400.

[0234] For example, such as Figure 10 (a) and Figure 10 As shown in (b), the reinforcing part 30 can protrude outward from the first surface 201 in a first direction. The flange 401 extends in a second direction and extends into the cavity formed by the protrusion 20.

[0235] It should be noted that the tapping direction of the reinforcing part 30 and the stamping direction of the plate 10 to form the reinforcing part 30 can be flexibly adjusted according to specific design requirements, installation conditions and manufacturing processes.

[0236] In some embodiments, such as Figure 8 (a) Figure 9 (a) and Figure 10 As shown in (a), the first surface 201 of the convex hull 20 can be circular. The diameter of this first surface 201... satisfy: This ensures that the top 204 of the convex hull 20 has a certain area, so as to ensure that there is enough space to stamp the reinforcing part 30 on the convex hull 20.

[0237] For example, the diameter of the first surface 201 It can be 6.1mm, 7mm, 7.5mm or 8mm.

[0238] In some embodiments, such as Figure 8 , Figure 9 and Figure 10 As shown, the base 32 of the reinforcing part 30 has a second surface 301, which can be circular, that is, the reinforcing part 30 is constructed as a cylindrical boss structure. The diameter of the second surface 301 is... The diameter of the first surface 201 satisfy:

[0239] That is, the reinforcing part 30 is disposed within the range of the first surface 201 of the convex hull 20, and the reinforcing part 30 will not exceed the boundary of the first surface 201 of the convex hull 20, thereby maintaining the compactness of the structure of the reinforcing part 30 and the aesthetics of the convex hull 20.

[0240] For example, if the diameter of the first surface 201 If the diameter is 7mm, then the diameter of the second surface 301 of the reinforcing part 30 is... A slightly smaller size can be selected, such as 6.5mm, 6mm, or 5.5mm, etc., and this embodiment does not limit this. In this way, it can be ensured that the reinforcing part 30 can provide sufficient structural reinforcement performance without protruding too much beyond the boundary of the first surface 201, thus ensuring the structural integrity of the bulge 20.

[0241] In some embodiments, the diameter of the second surface 301 The inner diameter M of the flange 401 satisfies:

[0242] That is, the threaded hole 40 is provided within the range of the second surface 301 of the reinforcing part 30, and the threaded hole 40 will not exceed the boundary of the second surface 301 of the reinforcing part 30, thereby maintaining the compactness and aesthetics of the structure of the reinforcing part 30.

[0243] To demonstrate the effectiveness of the reinforcing part 30 in preventing deformation of the plate 10, this application embodiment also provides simulation test diagrams. Figure 11 and Figure 12 This is a simulation test diagram of the stress on the threaded hole 40 on the plate 10 without the reinforcement 30. Figure 11 A simulation diagram is shown showing the application of a positive load of 200N to a threaded hole 40 on the plate 10 where no reinforcement 30 is provided. Figure 12 A simulation diagram is shown showing the application of a reverse load of 200N to the threaded hole 40 of the plate 10 where no reinforcement 30 is provided. Figure 11 and Figure 12 The simulation results shown indicate that the plate 10 around the threaded hole 40 without reinforcement 30 exhibits a large area of ​​plastic deformation, which may be caused by warping or denting relative to the surface of the plate 10.

[0244] Figure 13 A simulation diagram is shown showing a positive load of 200N applied to a threaded hole 40 with a reinforcing part 30. Figure 14 A simulation diagram is shown showing the application of a reverse load of 200N to the threaded hole 40 with the reinforcement 30. Figure 13 and Figure 14 The simulation results shown indicate that the area of ​​the deformation region around the threaded hole 40 with the reinforcement 30 on the plate 10 is effectively reduced (the light gray area represents the deformation region).

[0245] Table 1

[0246]

[0247] Furthermore, Table 1 is provided in this application embodiment. The data shown in Table 1 illustrates that when the reinforcing portion 30 is provided on the periphery of the threaded hole 40, the amount of plastic deformation of the plate 10 around the threaded hole 40 is significantly reduced compared to a scheme without the reinforcing portion 30 on the periphery of the threaded hole 40 when the reinforcing portion 30 is provided on the periphery of the threaded hole 40. When the reinforcing portion 30 is provided on the periphery of the threaded hole 40, the amount of plastic deformation generated in the plate 10 around the threaded hole 40 can be reduced by approximately 42.24% to 52.06%.

[0248] Furthermore, Table 1 is provided in this application embodiment. The data shown in Table 1 illustrates that when the reinforcing portion 30 is provided on the periphery of the threaded hole 40, the amount of plastic deformation of the plate 10 around the threaded hole 40 is significantly reduced compared to a scheme without the reinforcing portion 30 on the periphery of the threaded hole 40 when the reinforcing portion 30 is provided on the periphery of the threaded hole 40. When the reinforcing portion 30 is provided on the periphery of the threaded hole 40, the amount of plastic deformation generated in the plate 10 around the threaded hole 40 can be reduced by approximately 42.24% to 52.06%.

[0249] A second aspect of this application discloses a display device 2000. The display device 2000 includes the circuit board fixing structure 1000 disclosed in the first aspect of this application.

[0250] It is understood that the display device 2000 using the circuit board fixing structure 1000 of the above embodiments has all the technical effects of the circuit board fixing structure 1000 of the above embodiments, which will not be repeated here.

[0251] In some embodiments, the display device 2000 includes a display screen 200. The display screen 200 is a device interface for displaying visual content. The display screen 200 can be a screen with display function, such as a liquid crystal display screen or an organic light-emitting diode display screen.

[0252] In some embodiments, the display device 2000 may include a metal backplate 100. The metal backplate 100 can be used as the backplate of the display device to support the display screen 200. The metal backplate 100 may be the metal backplate 100 in the circuit board fixing structure 1000.

[0253] In some embodiments, the display device 2000 may include a rear cover 300. The rear cover 300 is disposed outside the circuit board fixing structure 1000 and is used to protect the circuit board fixing structure 1000.

[0254] In some embodiments, the display device 2000 may include a circuit board fixing structure 1000, which can securely mount the circuit board 400 to a metal backplate.

[0255] In some embodiments, the display device 2000 may also include functional components (such as an audio speaker 500) and structural components (such as a bracket, a housing, etc.), which may also be mounted to the protrusion 20 of the metal back plate 100 by screws.

[0256] Thus, because the thickness of the metal back plate 100 of the circuit board fixing structure 1000 is reduced, and the structural strength of the area around the threaded hole 40 is enhanced by the setting of the reinforcing part 30, the flange 401 of the threaded hole 40 is also lengthened, ensuring the structural strength of the thin and light board 10 during the fastening process, and the board 10 is not easily deformed. As a result, the display device 2000 using the circuit board fixing structure 1000 can achieve thinness and lightness while also ensuring the reliability of the display device 2000.

[0257] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A circuit board fixing structure, characterized in that, include: Metal backplate, the metal backplate comprising: plate body; A convex hull is disposed on the plate body, and a first surface is formed on the top of the convex hull, on which the following are disposed: Threaded hole; The reinforcing part protrudes outward or is recessed inward on the first surface; A circuit board is disposed on one side of the metal back plate, and the circuit board is provided with fixing holes; A screw passes through the fixing hole and is threaded into the threaded hole to secure the circuit board to the top of the bulge.

2. The circuit board fixing structure according to claim 1, characterized in that, The reinforcing part is a reinforcing rib structure, and the reinforcing part is arranged axially around the threaded hole.

3. The circuit board fixing structure according to claim 2, characterized in that, The reinforcing portion includes a first wall surface and a second wall surface that are radially spaced along the threaded hole. The first wall surface is closer to the threaded hole than the second wall surface, and at least one of the first wall surface and the second wall surface is a curved surface.

4. The circuit board fixing structure according to claim 3, characterized in that, Both the first wall surface and the second wall surface are curved surfaces, and the first wall surface and the second wall surface are respectively concentrically arranged with the center of the threaded hole.

5. The circuit board fixing structure according to claim 3, characterized in that, The reinforcing part is a ring-shaped reinforcing rib, and the first wall surface and the second wall surface are both cylindrical surfaces.

6. The circuit board fixing structure according to claim 2, characterized in that, The reinforcing part is a ring-shaped reinforcing rib.

7. The circuit board fixing structure according to claim 2, characterized in that, The reinforcing portion includes at least two first sub-reinforcing portions, which are spaced apart circumferentially along the threaded hole, and each first sub-reinforcing portion is arranged axially around the threaded hole.

8. The circuit board fixing structure according to claim 7, characterized in that, The first sub-reinforcing portion includes a sixth wall surface located at the circumferential end of the first sub-reinforcing portion and extending radially along the threaded hole.

9. The circuit board fixing structure according to claim 8, characterized in that, Each of the first sub-reinforcing parts includes a first wall surface and a second wall surface, wherein the first wall surface and the second wall surface are arc surfaces.

10. The circuit board fixing structure according to claim 3, characterized in that, The diameter of the first wall surface is The diameter of the second wall is The inner diameter of the threaded hole is M, where, 11. The circuit board fixing structure according to claim 1, characterized in that, The first surface is a plane, and the reinforcing part is located between the threaded hole and the edge of the first surface.

12. The circuit board fixing structure according to claim 11, characterized in that, The inner diameter of the threaded hole is M, and the edge of the first surface includes a first edge; The distance L1 between the center of the threaded hole and the first edge is L1, wherein L1 < 1.5M, and no reinforcing part is provided between the threaded hole and the first edge.

13. The circuit board fixing structure according to claim 12, characterized in that, The edge of the first surface includes the second edge; The distance L2 between the center of the threaded hole and the second edge, wherein L2 > 1.5M, and the reinforcing part is located between the threaded hole and the second edge, wherein M is the inner diameter of the threaded hole.

14. The circuit board fixing structure according to claim 11, characterized in that, The inner diameter of the threaded hole is M; The distance L3 between the center of the threaded hole and the edge of the first surface; Among them, L3 > 1.5M.

15. The circuit board fixing structure according to claim 1, characterized in that, The reinforcing portion includes at least two second sub-reinforcing portions, which surround the periphery of the threaded hole. The second sub-reinforcing part includes a third wall surface located at the end of the second sub-reinforcing part, and the third wall surface is radially inclined relative to the threaded hole.

16. The circuit board fixing structure according to claim 15, characterized in that, The third wall surface includes a first end and a second end. The first end of the third wall surface is closer to the threaded hole than the second end of the third wall surface. A first connecting line between the first end of the third wall surface and the center of the threaded hole forms a first included angle θ with the third wall surface, wherein θ < 90° or θ > 0°.

17. The circuit board fixing structure according to claim 15, characterized in that, The third wall surface includes a first end and a second end; The second sub-reinforcing part further includes a fourth wall surface connected to the first end of the third wall surface, and a fifth wall surface connected to the second end of the third wall surface. The fourth wall surface and the fifth wall surface are curved surfaces, and the fourth wall surface and the fifth wall surface are respectively eccentrically arranged with respect to the center of the threaded hole.

18. The circuit board fixing structure according to any one of claims 1 to 17, characterized in that, The reinforcing portion includes a second surface facing the circuit board, and there is a height difference H2 between the second surface and the first surface; The thickness of the plate is T; Among them, H2>1 / 4T, or H2<3T.

19. The circuit board fixing structure according to any one of claims 1 to 17, characterized in that, The threaded hole is a flanged threaded hole, and a first thread is formed inside the flanged threaded hole. The first thread is used for threaded connection with the screw.

20. A circuit board fixing structure, characterized in that, include: Metal backplate, the metal backplate comprising: plate body; A convex hull is disposed on the plate body, and a first surface is formed on the top of the convex hull, on which the following are disposed: The reinforcing portion protrudes outward or is recessed inward on the first surface, and the reinforcing portion includes: The second sidewall extends from the top in a direction toward or away from the plate. The base is located at the end of the second sidewall away from the top; A threaded hole is provided in the base; A circuit board is disposed on one side of the metal back plate, and the circuit board is provided with fixing holes; A screw passes through the fixing hole and is threaded into the threaded hole to secure the circuit board to the top of the bulge.

21. The circuit board fixing structure according to claim 20, characterized in that, The reinforcing part is a boss structure, and the reinforcing part protrudes outward from the first surface along the first direction; The threaded hole is a flanged threaded hole, and a first thread is formed inside the flanged threaded hole. The flange of the flanged threaded hole extends along a second direction, which is the opposite direction to the first direction.

22. The circuit board fixing structure according to claim 20, characterized in that, The reinforcing part is a recessed platform structure, and the reinforcing part is recessed into the first surface along the second direction; The threaded hole is a flanged threaded hole, and a first thread is formed inside the flanged threaded hole. The flange of the flanged threaded hole extends along a first direction, which is opposite to the second direction.

23. The circuit board fixing structure according to claim 22, characterized in that, At least a portion of the flange of the flanged threaded hole can be inserted into the circuit board.

24. The circuit board fixing structure according to any one of claims 21 to 23, characterized in that, The pitch of the first thread is L, and the extension length of the flange is H1, wherein H1>2L.

25. The circuit board fixing structure according to claim 20, characterized in that, The first surface is constructed to be circular with a diameter of The reinforcing portion includes a second surface facing the circuit board, and the diameter of the second surface of the reinforcing portion is [missing information]. in, 26. The circuit board fixing structure according to claim 1 or 20, characterized in that, The reinforcing portion is formed by stamping the convex bulge; and / or The threaded hole is formed by tapping the convex hump or the reinforcing portion; and / or The convex bulge is formed by stamping the plate.

27. The circuit board fixing structure according to claim 1 or 20, characterized in that, The thickness of the plate is T, where T < 0.8 mm.

28. A display device, characterized in that, include: Display screen; The rear cover is located on one side of the display screen; The circuit board fixing structure according to any one of claims 1 to 27, wherein the metal back plate in the circuit board fixing structure is located between the display screen and the rear shell.

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