Display screen structure

Abstract

The utility model discloses a display screen structure, belongs to the field of LED display screens, and aims to solve the problems that in the prior art, a connecting piece is inconvenient to install, complex in structure, easy to damage and fail, and poor in EMC (Electro Magnetic Compatibility) performance. The computer case comprises a case framework, a spring and a display screen module, spraying shielding points are arranged on the case framework, a screen control board and a module bottom shell are arranged on the two sides of the display screen module respectively, an installation base is arranged on the module bottom shell, the installation base is electrically connected with the screen control board, the spring comprises a limiting part, a compression part is arranged at one end of the limiting part, and a hooking part is arranged at the other end of the limiting part. The end portion of the compression portion abuts against the spray shielding point, the hook portion is clamped with the mounting base, and the display screen module is connected with the case framework through the spring to perform grounding conduction, so that electromagnetic interference can be suppressed, and the EMC performance is good.

Description

Technical Field

[0001] The utility model relates to the field of LED display screens, and more specifically, to a display screen structure. Background Art

[0002] At present, most building intelligent systems need to use equipment with strong resistance to electromagnetic interference. In particular, the installation of LED displays must comply with strict EMC requirements. EMC requirements are electromagnetic compatibility requirements. The system or equipment can work normally in the electromagnetic environment in which it is located without causing electromagnetic interference to other systems and equipment. Among them, the conduction between the LED display module and the chassis frame is a very important link.

[0003] Existing conductive connection methods between LED display modules and chassis frames include cable connection, ZIF / LIF connector, magnetic connection and crimp connection. Using cables to connect LED display modules to chassis frames is inconvenient to install, and there is a risk of cable failure due to damage and aging. Long-distance cables can easily become antennas, absorbing or radiating electromagnetic waves, and if the joints are not properly handled, they may become a source of radiation interference. ZIF / LIF connectors are zero insertion force / low insertion force connectors. Using ZIF / LIF connectors to connect LED display modules to chassis frames has a complex structure and requires inconvenient alignment during installation. Friction during the plugging and unplugging process may generate electrostatic discharge. Using magnetic connections to connect LED display modules to chassis frames may cause the magnetic field to affect sensitive electronic components, and additional electromagnetic interference will be generated near the magnet. Using crimping connections to connect LED display modules to chassis frames, the existing crimping connection method has the risk of the crimping parts falling off, and the crimping area may be unstable, resulting in poor contact, which will also affect EMC performance. Utility Model Content

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a display screen structure, comprising: a chassis frame, a spray-shielding point is provided on the chassis frame; a display screen module, a screen control board is provided on one side of the display screen module, and a module bottom shell is provided on the other side, a mounting seat is provided on the module bottom shell, and the mounting seat is electrically connected to the screen control board; a spring, the spring includes a limiting portion, a compression portion is provided at one end of the limiting portion, and a hook portion is provided at the other end, the end of the compression portion abuts against the spray-shielding point, and the hook portion is engaged with the mounting seat. The present invention has a simple structure in that one end of the spring abuts against the spray-shielding point on the chassis frame, and the other end is connected to the display screen module; the spring is made of stainless steel and is not easily damaged or failed; the display screen module can suppress electromagnetic interference through the design of grounding and conducting between the spring and the chassis frame, and has excellent EMC performance.

[0005] As a more preferred embodiment, a conductive foam is provided between the mounting base and the screen control board, providing electrical continuity between the mounting base and the screen control board. Since the screen control board is relatively fragile, to prevent vibration or shaking that could cause friction or impact between the mounting base and the screen control board, which could damage the screen control board, a conductive foam connection is provided between the mounting base and the screen control board to prevent vibration damage to the screen control board.

[0006] As a more preferred embodiment, the hook portion is arranged in a V-shape, and can be compressed and deformed when subjected to force. In order to better secure the spring in the mounting seat, the hook portion of the spring is arranged in a V-shape. When installed, the hook portion is compressed and deformed under force, and can be directly engaged with the inside of the mounting seat.

[0007] As a more preferred embodiment, the position-limiting portion and the hooking portion are arranged in the mounting hole. In order to avoid a gap between the chassis frame and the display module, the position-limiting portion and the hooking portion can be arranged in the mounting hole to prevent the chassis frame and the display module from shaking.

[0008] As a more preferred embodiment, the diameter of the limiting portion is smaller than the diameter of the mounting seat hole, and the width of the V-shaped hook portion is larger than the diameter of the mounting seat hole. To better connect the spring to the mounting seat, the width of the V-shaped hook portion is larger than the diameter of the mounting seat hole, so that it can better engage with the mounting seat hole.

[0009] As a more preferred embodiment, a threaded groove is provided inside the mounting seat hole, and the hook portion engages with the threaded groove. To increase the engagement stress between the hook portion and the mounting seat hole, a threaded groove is provided inside the mounting seat hole. When the hook portion is connected to the mounting seat, the threaded groove can be stably engaged with the threaded groove, thereby increasing the engagement stress between the hook portion and the mounting seat hole and preventing the spring from falling off.

[0010] As a more preferred embodiment, the hook portion and the threaded groove are rotatably detachable, allowing the hook portion to be separated from the mounting base. The threaded groove structure makes spring installation and removal very convenient. Simply press the spring to the bottom to complete its assembly with the mounting base, and simply unscrew the spring in the opposite direction along the internal thread to complete the removal process.

[0011] As a more preferred embodiment, the module bottom shell further includes an annular boss that abuts the chassis frame. This design improves the mechanical stability of the entire display module and makes it easier to position and secure the display module to the chassis frame, simplifying the assembly process between the display module and the chassis frame.

[0012] As a more preferred embodiment, the mounting base further includes a plurality of bosses on the outside, which are engaged with the module bottom shell. By providing a plurality of bosses on the outside of the mounting base to engage with the module bottom shell, the mounting base can be prevented from falling off from the module bottom shell.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) one end of the spring abuts against the shielding point of the chassis frame, and the other end is connected to the display screen module, which has a simple structure; (2) the hook portion of the spring is arranged in the threaded groove of the mounting seat hole, which is convenient for installation and disassembly; (3) the spring is made of stainless steel and is not easily damaged or failed; (4) the display screen module is connected to the chassis frame through the spring and is grounded and conductive, which can suppress electromagnetic interference and has good EMC performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the present utility model.

[0015] Figure 2 It is a partial schematic diagram of the chassis frame of the present utility model.

[0016] Figure 3 It is a schematic diagram of the installation of the spring of the present utility model.

[0017] Figure 4 It is a three-dimensional diagram of the spring of the present utility model.

[0018] In the figure: 1. Chassis frame, 11. Cover spray point;

[0019] 2. Display module, 21. Screen control board, 22. Module bottom shell, 221. Annular boss, 23. Mounting seat, 231. Mounting seat hole, 232. Threaded groove, 233. Annular flange, 24. Conductive foam;

[0020] 3. Spring, 31. Limiting part, 32. Compression part, 33. Hooking part. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0022] Example:

[0023] like Figures 1 to 4The display screen structure shown is mainly composed of a chassis frame 1, a display screen module 2, and a spring 3. The chassis frame 1 is provided with a shielding point 11, which is a circular metal surface exposed to the outside of the chassis frame 1 and is used to achieve electrical conduction between the spring 3 and the chassis frame 1. A screen control board 21 is provided on one side of the display screen module 2. The screen control board 21 is used to receive and process display signals and control the display content of the LED display screen. A module bottom shell 22 is provided on the other side. A mounting seat 23 is provided on the module bottom shell 22. The mounting seat 23 is used to install the spring 3. The mounting seat 23 is electrically connected to the screen control board 21. More specifically, a conductive foam 24 is provided between the mounting seat 23 and the screen control board 21. The mounting seat 23 and the screen control board 21 are electrically connected through the conductive foam 24. The presence of the conductive foam 24 ensures a good and stable conductive connection between the mounting seat 23 and the screen control board 21. In order to avoid vibration or shaking that causes friction or collision between the mounting seat 23 and the screen control board 21 and damage to the screen control board 21, the mounting seat 23 and the screen control board 21 are connected through the conductive foam 24. One end of the spring 3 abuts and connects with the shielding point 11 on the chassis frame 1, and the other end of the spring 3 is assembled with the mounting seat 23 provided on the module bottom shell 22. More specifically, the end of the compression portion 32 provided at one end of the limiting portion 31 of the spring 3 abuts and connects with the shielding point 11, and the hook portion 33 provided at the other end of the limiting portion 31 of the spring 3 engages with the mounting seat 23. The above structure is used to achieve a grounding connection between the display module 2 and the chassis frame 1, and the conduction is very stable and reliable. The module bottom shell 22 includes an annular boss 221, which abuts with the chassis frame 1. The design of the annular boss 221 improves the mechanical stability of the entire display module 2, and at the same time makes it easier to position and fix the display module 2 on the chassis frame 1, simplifying the assembly process between the display module 2 and the chassis frame 1. The above-mentioned conductive connection structure between the display screen module 2 and the chassis frame 1 can enable the display screen module 2 to be grounded through the chassis frame 1. This grounding conductive design can not only suppress the influence of external electromagnetic interference, but also suppress the outward radiation interference of the equipment. Its EMC performance, that is, electromagnetic compatibility, is better. This conductive connection structure makes an important contribution to the installation of the display screen module 2 meeting strict EMC requirements.

[0024] like Figure 1As shown, in some embodiments, the mounting seat 23 is made of copper material and thus has excellent electrical conductivity. In terms of structure, the mounting seat 23 is cylindrical, and a mounting seat hole 231 is provided at the center of its upper surface. The hook portion 33 and the limiting portion 31 of the spring 3 are arranged in the mounting seat hole 231. The inner wall of the mounting seat hole 231 is provided with a thread, and the symmetrical cross-section of the inner wall thread includes a raised thread tooth and a recessed thread groove 232. The hook portion 33 of the spring 3 is clamped with the thread groove 232. This clamping structure can prevent the spring 3 from escaping from the mounting seat 23, and at the same time facilitates the installation and disassembly of the spring 3. The bottom end of the interior of the mounting seat hole 231 is conical. The outer surface of the mounting seat 23 is provided with a plurality of raised annular flanges 233, and the plurality of annular flanges 233 are snap-fitted to the module bottom shell 22. This structure can prevent the mounting seat 23 from shaking and can enhance the connection stability between the mounting seat 23 and the surrounding module bottom shell 22. Of course, the mounting seat 23 can also be made of other alloy materials as long as its function can achieve the relevant function, and the specific material is not specifically limited.

[0025] like Figure 4 As shown, spring 3 includes a compression portion 32, a limiting portion 31, and a hook portion 33. The limiting portion 31 is provided with the compression portion 32 at one end and the hook portion 33 at the other end. The compression portion 32 is conical. More specifically, in some embodiments, the compression portion 32 is a conical spring that can be compressed and automatically restored to its original shape. In the unstressed, i.e., uncompressed, state, the height of the conical spring of the compression portion 32 is 4 mm. The designed height of the conical spring of the compression portion 32 must be greater than the distance between the upper end of the annular boss 221 and the plane of the chassis frame 1 after the display module 2 and the chassis frame 1 are fully assembled. The conical spring's inherent stable elasticity and stainless steel material ensure excellent conductivity and contact performance when in contact with the chassis frame 1, effectively preventing electromagnetic field leakage and thereby reducing radiation emission levels.

[0026] like Figure 4 As shown, the diameter of the top end of the compression portion 32 is larger than the diameter of the bottom end of the compression portion 32, that is, the compression portion 32 is a conical spring that is larger at the top and smaller at the bottom. The compression portion 32 is a conical spring that is larger at the top and smaller at the bottom. The largest circle at the top end of the conical spring directly contacts the plane of the chassis frame 1. Therefore, the conductive contact surface between the upper end of the compression portion 32 and the chassis frame 1 is larger, and the supporting area with the chassis frame 1 is also larger. The mechanical connection is more stable and reliable, and a stable contact pressure can be maintained under pressure, thereby ensuring good electrical continuity between the display module 2 and the chassis frame 1, which helps to reduce radio frequency leakage caused by poor contact, thereby reducing radiation emission.

[0027] like Figure 4As shown, the diameter of the bottom end of the compression portion 32 is larger than the diameter of the limiting portion 31. That is, after transitioning from the top of the limiting portion 31 to the bottom end of the compression portion 32, the diameter of the spring coil increases immediately. This design is intended to effectively prevent the bottom end of the compression portion 32 from being pressed into the mounting seat hole 231 when the spring 3 is pressed downward to be installed on the mounting seat 23, thereby ensuring that a certain gap is always left between the bottom end of the hook portion 33 and the bottom of the mounting seat hole 231. The purpose of always leaving a certain gap between the bottom end of the hook portion 33 and the bottom of the mounting seat hole 231 is to prevent the bottom end of the hook portion 33 from directly contacting the bottom of the mounting seat hole 231 during the installation process of the spring 3 due to the downward pressure on the spring 3, which could cause the spring 3 to deform, become damaged, and lose its function. Therefore, the need to always leave this gap protects the structure of the spring 3, especially the structure of the hook portion 33, so that the hook portion 33 can continue to function stably. During the process of installing the display screen module 2 on the chassis frame 1 and in subsequent use, the top of the spring 3 will also be subjected to a pressing force. Therefore, during this process, the gap left between the bottom end of the hook portion 33 and the bottom of the mounting seat hole 231 can also play the same role as when installing the spring 3. This mechanical stability helps to maintain the long-term EMC performance of the spring 3.

[0028] like Figure 4 As shown, the top of the compression portion 32 forms a plane. That is, the spring coils at the top of the conical spring of the compression portion 32 form a plane rather than a three-dimensional structure. More specifically, in some embodiments, the spring coils at the top of the conical spring of the compression portion 32 form a circular surface, with an outer diameter of 7.3 mm. This design increases the conductive contact surface between the top end of the compression portion 32 and the chassis frame 1, while also increasing the support area with the chassis frame 1, thereby improving the stability and reliability of the mechanical connection. Furthermore, the plane formed at the top of the compression portion 32 is perpendicular to the hook portion 33, resulting in better contact performance when the top plane of the compression portion 32 abuts against the plane of the chassis frame 1. The two planes can directly and completely mate with each other. This design at the top of the compression portion 32 ensures that, in the compressed state, the spring 3 can closely contact the conductive surface of the chassis frame 1, ensuring good and reliable electrical contact, effectively preventing electromagnetic field leakage, and reducing the level of radiated emissions.

[0029] like Figure 4As shown, the limiting portion 31 is quasi-cylindrical. More specifically, the limiting portion 31 is a quasi-cylindrical, incompressible spring 3. The outer diameter of the quasi-cylindrical spring 3 is designed to be 3.2 mm. The outer diameter of the limiting portion 31 is slightly smaller than the inner diameter of the mounting seat hole 231. This prevents the spring 3 from abnormally moving during subsequent use after assembly with the mounting seat 23. Assuming that the spring 3 does not have the limiting portion 31, then during subsequent use, if the spring 3 is subjected to external forces, such as relative displacement between its compression portion 32 and the chassis frame 1, the hook portion 33 will be directly affected and deform and move, resulting in unstable and unreliable contact and conductive connection. Therefore, the outer diameter design of the cylindrical spring of the stopper 31 and its mating relationship with the internal thread of the mounting seat 23 can effectively fix the spring 3 in the horizontal direction. This makes the overall mechanical structure of the spring 3 more stable after installation and during subsequent use, and its contact and conductive connection more stable and reliable, reducing the generation and propagation of electromagnetic interference, and helping to maintain long-term EMC performance. The height of the cylindrical spring of the stopper 31 is designed to be 2.4 mm. This height cannot be designed too large or too small. The design value of the height needs to be determined after extensive testing. If the height of the stopper 31 is designed too large, the overall structure of the spring 3 will become more complex and unsightly, and it will also affect the setting of the gap between the bottom end of the hook portion 33 and the bottom of the mounting seat hole 231. Conversely, if the height of the stopper 31 is designed too small, the stopper 31 will not effectively fix the spring 3 in the horizontal direction.

[0030] The hook portion 33 is V-shaped and compresses when subjected to force. This compression greatly facilitates the installation of the spring 3. Installation is accomplished by pressing the spring 3 into the bottom of the mounting hole 231 in the mounting seat 23. In some embodiments, the height of the hook portion 33 is designed to be 6.9 mm, a height value that requires extensive testing to determine. The V-shaped design of the hook portion 33 allows for stable rotational removal from the threaded groove 232, thereby separating the hook portion 33 from the mounting seat 23 and facilitating removal.

[0031] like Figure 4 As shown, the width of the V-shape of the hook portion 33 is greater than the inner diameter of the mounting seat hole 231, and the inner diameter of the mounting seat hole 231 is slightly greater than the outer diameter of the limiting portion 31. Naturally, the width of the V-shape of the hook portion 33 is greater than the outer diameter of the limiting portion 31. Specifically, the V-shape structure of the hook portion 33 is wider than the mounting seat hole 231, which enables the end of the hook portion 33 to be inserted into the thread groove 232 in the inner thread of the mounting seat hole 231, which is convenient for installation and the structure is firm and stable after installation, and the conduction is stable and reliable.

[0032] like Figure 4 As shown, the spring 3 adopts an integrated design, which establishes a continuous conductive path between the display module 2 and the chassis frame 1, which helps to form a continuous conductive shielding layer between the display module 2 and the chassis frame 1, reducing the leakage of electromagnetic radiation, and also blocking external electromagnetic interference from entering the system, thereby enhancing the electromagnetic shielding effectiveness of the entire system; the spring 3 adopts a miniaturized design, with an overall height of only 13.3 mm. Its height design value needs to be determined after a large number of tests. It can shorten the path length of high-frequency current, thereby reducing the impact of high-frequency interference, which is very important for meeting the EMC requirements of radiated emission and conducted emission; the spring 3 is made of stainless steel, which not only provides good mechanical strength and durability, but also has good corrosion resistance, which can prevent the increase in contact resistance caused by corrosion from affecting the EMC performance. Of course, the spring 3 can also be made of other alloy materials, and the specific material is not specifically limited.

[0033] like Figure 1-4 As shown, the working principle of the present invention is that when the spring 3 is assembled to the mounting seat 23, the hook portion 33 is manually aligned and inserted into the mounting seat hole 231 of the mounting seat 23, and then the top of the compression portion 32 is pressed to apply a certain pressure thereto. Since the spring 3 has excellent elastic properties and the V-shaped structure of the hook portion 33 is wider than the mounting seat hole 231, the V-shaped structure of the hook portion 33 produces a centripetal compression deformation, which enables the end of the hook portion 33 to be stuck in the thread groove 232 in the internal thread of the mounting seat hole 231, thereby completing the assembly of the spring 3 and the mounting seat 23. If the spring 3 is damaged or deformed irreversibly, when the spring 3 needs to be removed from the mounting seat 23, the hook portion 33 is inserted into the thread groove 232 in the internal thread of the mounting seat 23, and the inner diameter of the limiting portion 31 is slightly smaller than the inner diameter of the thread groove 232. By cleverly utilizing the matching relationship between the hook portion 33 and the internal thread of the mounting seat 23, the spring 3 only needs to be unscrewed in the opposite direction along the internal thread to complete the spring 3 removal process. It can be seen that the installation and removal of the spring 3 are very convenient and quick.

[0034] The embodiments described above are only preferred solutions of the present invention and do not limit the present invention in any form. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the utility model should be included in the scope of protection of the present invention.

Claims

1. A display screen structure, characterized in that: include: A chassis frame, wherein the chassis frame is provided with a spray shielding point; A display screen module, wherein one side of the display screen module is provided with a screen control board, and the other side is provided with a module bottom shell, the module bottom shell is provided with a mounting seat, and the mounting seat is electrically connected to the screen control board; The spring includes a limiting portion, one end of the limiting portion is provided with a compression portion, and the other end is provided with a hook portion, the end of the compression portion abuts against the spray shielding point, and the hook portion is engaged with the mounting seat.

2. A display screen structure according to claim 1, characterized in that: Conductive foam is provided between the mounting seat and the screen control board, and the mounting seat and the screen control board are electrically connected through the conductive foam.

3. A display screen structure according to claim 1, wherein the hook portion is arranged in a V shape and can be compressed and deformed when subjected to force.

4. A display screen structure according to claim 3, characterized in that: The mounting seat is provided with a mounting seat hole, and the limiting portion and the hooking portion are arranged in the mounting seat hole.

5. A display screen structure according to claim 4, characterized in that: The diameter of the limiting portion is smaller than the diameter of the mounting seat hole, and the V-shaped width of the hooking portion is larger than the diameter of the mounting seat hole.

6. The display screen structure according to claim 4, characterized in that: A thread groove is provided inside the mounting seat hole, and the hook portion is engaged with the thread groove.

7. A display screen structure according to claim 6, characterized in that: The hook portion and the thread groove are rotatably detachable, so that the hook portion is separated from the mounting seat.

8. A display screen structure according to any one of claims 1 to 7, characterized in that: The module bottom shell also includes an annular boss, which abuts against the chassis frame.

9. A display screen structure according to any one of claims 1 to 7, characterized in that: The outside of the mounting seat further includes a plurality of annular flanges, and the plurality of annular flanges are clamped with the module bottom shell.

Images