Multi-degree-of-freedom adjusting device for screen monitoring equipment

Abstract

The invention discloses a screen monitoring equipment multi-degree-of-freedom adjusting device, and relates to the technical field of screen adjusting devices.The screen monitoring equipment multi-degree-of-freedom adjusting device comprises an armature disc, an annular electromagnet and a damping shifting piece, the armature disc is clamped with a cylindrical rolling head of the damping shifting piece through a one-way ratchet wheel on the outer side, and the damping shifting piece is connected with the annular electromagnet through a reset spring; an annular coil in the annular electromagnet is connected with an external controller through a connecting line, and the annular electromagnet is arranged on the outer side of the armature disc in a sleeving mode. By installing the armature disc, the annular electromagnet and the damping shifting piece, non-contact electromagnetic locking and anti-falling self-locking are achieved, the service life of equipment is prolonged, the maintenance cost is reduced, and the safety and reliability of the equipment are improved.

Description

Technical Field

[0001] This invention relates to the field of screen adjustment device technology, specifically a multi-degree-of-freedom adjustment device for screen monitoring equipment. Background Technology

[0002] With the widespread application of video surveillance technology in traffic management, industrial control, medical assistance, and security monitoring, screen monitoring equipment needs frequent angle and position adjustments to meet the observation needs of different perspectives. Currently, most common screen adjustment devices use manual hinges, friction hinges, or mechanical locking structures. Some monitoring displays achieve angle adjustment through damping hinges, relying on the friction torque inside the hinge to balance the weight of the monitoring screen. However, after long-term use, the friction plates are prone to wear, resulting in a decrease in locking force and a slow screen slide, leading to poor stability. Other devices use manual knobs or bolt locking methods, which can achieve fixation, but the adjustment process is cumbersome, requiring two-hand operation, and it is difficult to achieve continuous and precise angle adjustments, reducing efficiency.

[0003] Patent CN115493050B discloses a screen adjustment device, which enables the adjustment of the screen angle.

[0004] The aforementioned patent's motion component is connected to the first support plate and is used to drive the first support plate to move along the direction defined by the first guide groove. This screen adjustment device achieves screen angle adjustment by constructing a specific product structure, which improves screen flexibility and enhances customer experience. However, there is still room for optimization in maintaining locking force during long-term use.

[0005] Therefore, this application proposes a multi-degree-of-freedom adjustment device for screen monitoring equipment that can maintain locking force for a long time. Summary of the Invention

[0006] The purpose of this invention is to provide a multi-degree-of-freedom adjustment device for screen monitoring equipment, so as to solve the technical problems of inconvenient screen adjustment, poor locking reliability and insufficient security of existing devices mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a multi-degree-of-freedom adjustment device for a screen monitoring equipment, comprising an armature disk, a ring electromagnet, and a damping lever. The armature disk engages with the cylindrical rolling head of the damping lever via a one-way ratchet on its outer side. The damping lever is fixed in a groove via a fixed shaft. The damping lever is connected to the ring electromagnet via a return spring. The ring coil inside the ring electromagnet is connected to an external controller via a connecting wire. The ring electromagnet is sleeved on the outside of the armature disk. The armature disk is fixed on a central shaft via a first limiting disk and a second limiting disk. A first bearing and a second bearing on the central shaft are connected to a connecting cylinder. The controller on the connecting cylinder is connected to an adjustment button on the monitoring display screen via a connecting wire.

[0008] Preferably, the armature disk is annular, and the inner wall of the armature disk is provided with symmetrically distributed slots. The slots are rectangular in structure, and the inner wall of the slots fits into the outer wall of the block. The blocks are symmetrically arranged on the outer wall of the central shaft. The outer wall of the central shaft is provided with a first limiting disk and a second limiting disk, and the armature disk is fixed between the first limiting disk and the second limiting disk.

[0009] Preferably, a one-way ratchet is provided on the outer side of the armature disk. The one-way ratchets are arranged in a circumferential array on the outer side of the armature disk. The rear side of the one-way ratchet is an outer arc surface, and the front side of the one-way ratchet is an inner arc surface. A damping pad is provided on the inner arc surface of the one-way ratchet.

[0010] Preferably, the outer wall of the damping pad is in contact with the outer wall of the cylindrical rolling head, the cylindrical rolling head is fixed to the front end of the damping paddle by a rotating shaft, the bottom end of the outer wall of the damping paddle is provided with a second circular groove, a return spring is connected in the second circular groove, the top end of the outer wall of the return spring is provided in the second circular groove, and the bottom end of the outer wall of the return spring is provided in the first circular groove.

[0011] Preferably, the first circular groove is disposed at the bottom end of the inner wall of the groove, the groove is disposed on the inner wall of the annular electromagnet, the grooves are distributed in a circumferential array on the inner wall of the annular electromagnet, a fixed shaft is disposed on the side of the inner wall of the groove, the outer wall of the fixed shaft is fitted with the inner wall of the through hole, the through hole is disposed on the side of the outer wall of the damping plate, the through hole enters from the left side of the outer wall of the damping plate and exits from the right side of the outer wall of the damping plate, and the damping plate is fixed in the groove by the fixed shaft.

[0012] Preferably, the annular electromagnet has an annular groove inside, which is a closed loop along the circumference of the annular electromagnet. An annular coil is disposed in the annular groove, and the annular coil is evenly arranged around the annular groove. A connecting wire is disposed at the tail end of the annular coil, and the connecting wire of the annular coil passes through the annular electromagnet and is connected to the controller.

[0013] Preferably, the annular electromagnet is fixed to the inner wall side of the connecting cylinder, and a third circular groove is provided on both sides of the outer wall of the connecting cylinder. The inner walls of the third circular grooves on both sides of the connecting cylinder are respectively fitted with the outer walls of the first bearing and the second bearing. The first bearing and the second bearing have the same size and structure, and the inner walls of the first bearing and the second bearing are fitted with the outer wall of the central shaft.

[0014] Preferably, the central shaft is connected to the torque sensor, the torque sensor is located outside the first limiting plate, the torque sensor is fixed inside the connecting cylinder, the inner wall of the connecting cylinder and the outer wall of the torque sensor are fitted together, the outer wall of the torque sensor is provided with a connecting wire, the connecting wire of the torque sensor passes through the connecting cylinder and is connected to the controller, the controller is located at the top of the outer wall of the connecting cylinder, and a support rod is provided at the bottom of the outer wall of the connecting cylinder.

[0015] Preferably, the outer walls of the central shaft are connected to connecting rods on both sides, the outer walls of the connecting rods are connected to a fixing plate at the front end, the fixing plate is rectangular, and the outer wall of the fixing plate is connected to the monitoring display screen.

[0016] Preferably, an adjustment button is provided on the outside of the monitoring display screen, and a connecting wire is provided on the inside of the adjustment button. The connecting wire of the adjustment button is connected to the controller at the top of the outer wall of the connecting cylinder.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention achieves non-contact electromagnetic locking by incorporating an armature plate, a ring electromagnet, a first limiting plate, a second limiting plate, and a central shaft. This solves the problem of traditional mechanical friction locking mechanisms failing to maintain locking force over time due to wear and tear and reduced locking force caused by prolonged use. The ring electromagnet, when energized, generates a uniform magnetic field that attracts the armature plate axially. The magnitude of this attraction is adjusted by the current output from the controller. The armature plate is fixedly fitted onto the central shaft, and the first and second limiting plates reliably limit its position, preventing axial movement. During normal operation, the locking torque generated by the electromagnetic attraction is far greater than the maximum gravitational torque of the monitoring display screen, thus firmly locking the central shaft and ensuring stability of the display screen at any angle. There is no direct mechanical contact between the armature plate and the ring electromagnet during locking, avoiding the locking force attenuation problem caused by surface wear in traditional friction hinges or damping shafts. It eliminates the need to replace friction plates or periodically tighten bolts, extending the equipment's lifespan and reducing maintenance costs. It is suitable for scenarios requiring long-term continuous operation, such as traffic control centers and security monitoring rooms. 2. This invention, by incorporating a controller, a ring electromagnet, and a torque sensor, achieves real-time monitoring and adaptive adjustment of the locking torque. It solves the problem of reduced electromagnetic attraction caused by fluctuations in the ring coil current due to power grid voltage fluctuations or temperature changes. The torque sensor continuously detects minute torque changes on the central shaft with a millisecond-level response speed and feeds the detection signal back to the controller in real time. The controller has a preset safe torque threshold. When the detected torque value exceeds the preset safe threshold, the controller immediately and automatically increases the output current of the ring coil to enhance the electromagnetic attraction. When the torque value stabilizes below the threshold, the controller maintains the current to reduce energy consumption. This invention can compensate for adverse factors such as power supply voltage fluctuations, ambient temperature changes, or coil resistance drift caused by long-term operation, ensuring that the locking torque remains stable within the preset range. It has strong environmental adaptability and anti-interference capabilities, ensuring stable locking of the monitoring display screen for extended periods even in industrial sites or outdoor environments with poor power quality, preventing slow sliding or unexpected rotation, thus improving the safety and reliability of the equipment. 3. This invention, by incorporating an armature plate, a one-way ratchet, a ring electromagnet, a damping plate, and a return spring, achieves instantaneous mechanical self-locking in the event of a power outage. This solves the problem of the electromagnetic attraction force disappearing and the monitoring display screen suddenly falling under gravity when the equipment experiences an unexpected power outage or power failure. During normal operation, the ring electromagnet generates a magnetic field when energized, attracting the damping plate into the groove and compressing the return spring. At this time, the cylindrical rolling head at the front end of the damping plate completely disengages from the one-way ratchet on the outside of the armature plate, without affecting normal locking and adjustment. In the event of an unexpected power outage, the ring electromagnet immediately demagnetizes, and the elastic potential energy stored in the return spring is rapidly released. The damping lever is quickly released, pushing it out of the groove and causing the cylindrical rolling head to engage with the tooth groove of the one-way ratchet. The one-way ratchet has an asymmetrical tooth structure. When the monitoring display screen falls, the one-way ratchet rotates counterclockwise. During counterclockwise rotation, the tooth groove and the cylindrical rolling head form a self-locking mechanism, which can reliably prevent the armature plate from continuing to rotate counterclockwise, thereby preventing the monitoring display screen from falling due to gravity and avoiding the risk of impact damage or personal injury. After power is restored, the operator only needs to press the adjustment button and lift the display screen upwards to easily release the lock and reset it. This achieves dual safety protection of electromagnetic locking and mechanical locking, solving the problem of falling during power outages. 4. This invention, by incorporating a damping paddle, a cylindrical rolling head, a damping pad, and a one-way ratchet, achieves low impact and low wear during power-off locking. It solves the problems of contact surface wear, increased noise, and shortened lifespan caused by the one-way ratchet and damping paddle engaging. Under normal energization, the magnetic field generated by the annular electromagnet stably attracts the damping paddle inside the groove, ensuring a completely non-contact state between the cylindrical rolling head and the one-way ratchet, eliminating any friction or engagement. Therefore, there is no mechanical noise or wear during operation, and the adjustment is smooth and fluid. When power-off locking occurs, the return spring pushes the damping paddle out. The cylindrical rolling head first contacts the inner arc surface on the front side of the one-way ratchet. The cylindrical rolling head rolls upon contact. The inner arc surface is a smooth curved surface, and rolling friction is the main force at the moment of contact, avoiding sharp impacts and surface scratches. Then the cylindrical rolling head slides into the bottom of the tooth groove and contacts the damping pad bonded to the one-way ratchet. The damping pad is made of elastic material with a high coefficient of friction, which can absorb impact energy while providing reliable static friction locking, preventing direct rigid collision between metals, reducing the instantaneous stress on the contact surface, and effectively protecting the tooth surface of the one-way ratchet, so that the anti-fall structure can maintain good performance for a long time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the connecting cylinder structure of the present invention; Figure 3 This is a schematic diagram of the structure of the central shaft being pulled out of the connecting cylinder according to the present invention; Figure 4 This is a schematic diagram of the first and second bearings of the present invention being pulled out from the central shaft; Figure 5 This is a schematic diagram of the structure of the armature disk being pulled out of the annular electromagnet according to the present invention; Figure 6 This is a schematic diagram of the connection structure between the armature disk and the central shaft of the present invention; Figure 7 This is a schematic diagram of the ring electromagnet structure of the present invention; Figure 8 This is a schematic diagram of the connection structure between the damping lever and the annular electromagnet of the present invention; Figure 9 This is a schematic diagram of the armature disk structure of the present invention; Figure 10 This is a schematic diagram of the damping paddle structure of the present invention; Figure 11 This is a side view of the damping paddle engaging with the one-way ratchet of the present invention; Figure 12 This is a schematic diagram of the connection structure between the damping plate and the return spring of the present invention.

[0019] In the diagram: 1. Armature plate; 2. Slot; 3. One-way ratchet; 4. Damping pad; 5. Central shaft; 6. Locking block; 7. First limiting plate; 8. Second limiting plate; 9. Ring electromagnet; 10. Groove; 11. First circular groove; 12. Fixed shaft; 13. Return spring; 14. Damping paddle; 15. Second circular groove; 16. Through hole; 17. Cylindrical rolling head; 18. Torque sensor; 19. First bearing; 20. Second bearing; 21. Connecting cylinder; 22. Controller; 23. Third circular groove; 24. Support rod; 25. Connecting rod; 26. Fixing plate; 27. Monitoring display screen; 28. Adjustment button. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Please see Figure 1 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10An embodiment of the present invention provides a multi-degree-of-freedom adjustment device for a screen monitoring device, wherein the armature disk 1 is engaged with the cylindrical rolling head 17 of the damping plate 14 through the one-way ratchet 3 on the outer side, the damping plate 14 is connected to the annular electromagnet 9 through the return spring 13, the annular coil inside the annular electromagnet 9 is connected to the external controller 22 through the connecting wire, and the annular electromagnet 9 is sleeved on the outer side of the armature disk 1; Furthermore, under normal operating conditions, the controller 22 energizes the ring coil inside the ring electromagnet 9 via a connecting wire. When energized, the ring coil generates a uniform and stable magnetic field. This magnetic field exerts an axial attraction force on the armature disk 1, the magnitude of which is proportional to the square of the current. The armature disk 1 is made of electrical pure iron with high magnetic permeability. When the ring coil is energized and outputs a 2A current, the magnetic field generates a 50N attraction force on the armature disk 1, producing a torque of 20N·m. This attraction force is used to overcome the maximum gravitational torque generated by the monitoring display screen 27 at any angle. The torque (10 N·m) can prevent the armature disk 1 from rotating. After the armature disk 1 is locked, the central shaft 5, which is engaged with the armature disk 1 through the slot 2 and the block 6, cannot rotate or move. The central shaft 5 is fixedly connected to one end of the connecting rod 25, and the other end of the connecting rod 25 is connected to the fixing plate 26. The fixing plate 26 is fixedly connected to the monitoring display screen 27 by bolts. At this time, the angle and position of the monitoring display screen 27 are also completely locked, ensuring that the monitoring display screen 27 can remain stable when subjected to external vibration or wind load, without shaking or shifting, thereby ensuring the clarity and stability of the monitoring screen. The damping lever 14 is made of electrical pure iron, possessing high saturation magnetic induction intensity, enabling rapid response in a magnetic field with minimal residual magnetism. The damping lever 14 is elongated, with its front end connected to a cylindrical rolling head 17 via a rotating shaft. The cylindrical rolling head 17 is made of bearing steel, exhibiting high wear resistance. When the annular coil is energized to generate a magnetic field, the damping lever 14 is attracted by magnetic force. A magnetic force of 10N can overcome the initial elastic force (2N) of the return spring 13, compressing the return spring 13 and retracting it into the groove 10 within the inner wall of the annular electromagnet 9. When adsorbed into the groove 10, the cylindrical rolling head 17 at the front end of the damping paddle 14 is in a completely non-contact state with the one-way ratchet 3 set on the outer side of the armature disk 1. The tooth profile of the one-way ratchet 3 is asymmetrical. The rear side of the one-way ratchet 3 is an outer arc surface, and the front side of the one-way ratchet 3 is an inner arc surface with a damping pad 4 attached. There is no contact between the cylindrical rolling head 17 and the one-way ratchet 3. No friction noise is generated during normal operation, and no resistance is generated to the rotation of the armature disk 1. Non-contact electromagnetic locking of the armature disk 1 is achieved, which improves the practical performance and long-term stability of the multi-degree-of-freedom adjustment device of the screen monitoring equipment.

[0024] Please see Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 An embodiment of the present invention provides a multi-degree-of-freedom adjustment device for a screen monitoring device, wherein the annular electromagnet 9 is fixed to the inner wall side of the connecting cylinder 21, and the outer wall of the connecting cylinder 21 is provided with a third circular groove 23 on both sides. The inner walls of the third circular groove 23 on both sides of the connecting cylinder 21 are respectively fitted with the outer walls of the first bearing 19 and the second bearing 20. The central shaft 5 is connected to the torque sensor 18, and the torque sensor 18 is connected to the controller 22 through a connecting line. The controller 22 is located at the top of the outer wall of the connecting cylinder 21, and a support rod 24 is provided at the bottom of the outer wall of the connecting cylinder 21. Furthermore, under stable operating conditions, the torque sensor 18 continuously detects the torque of the central shaft 5 in real time. The torque sensor 18 detects minute torque changes on the central shaft 5 with a millisecond-level response speed. When the ring electromagnet 9 firmly attracts the armature disk 1 through the attraction force, the central shaft 5 is in a completely stationary state. At this time, the torque value detected by the torque sensor 18 is zero, indicating that the equipment has entered a stable locking mode. The angle and position of the monitoring display screen 27 will not have any unexpected deviation. The controller 22 has a preset safe torque threshold, which is set to 0.1 N·m, to determine whether the equipment is in a reliable locking benchmark. When the torque value detected by the torque sensor 18 is lower than the preset safe threshold, the controller 22 determines that the current locking state is valid. If the detected torque value exceeds the preset safe threshold, the controller 22 will increase the current of the ring coil to enhance the attraction force and ensure the reliability of the locking. For example, for every 0.01 N·m that the actual torque exceeds the threshold, the controller 22 will increase the output current of the ring coil by 0.1 A, which improves the equipment's resistance to external disturbances (such as vibration, wind load, or slight impact) and ensures the continuous stability of the monitoring screen. When maintaining equipment stability, the controller 22 outputs a stable operating current to the ring coil inside the ring electromagnet 9. For example, when the output current is 2A, the magnetic field generated by the ring coil produces a 50N attraction force on the armature disk 1. The locking torque corresponding to the attraction force is 20N·m. The locking torque is greater than the maximum gravitational torque that the monitoring display screen 27 may generate at any angle. The maximum gravitational torque is 10N·m. The 20N·m locking torque is twice the maximum gravitational torque, providing sufficient safety margin. Even if the monitoring display screen 27 is subjected to additional wind load or vibration impact in extreme postures (such as fully horizontal extension), the electromagnetic locking mechanism can still firmly fix the armature disk 1 and prevent the armature disk 1 from rotating. This not only ensures the stable output of the monitoring screen, but also avoids mechanical fatigue caused by frequent adjustments and extends the service life of the equipment. At the same time, the high permeability armature disk 1 and the ring electromagnet 9 form an efficient magnetic circuit with high energy conversion efficiency and low heat generation, making it suitable for long-term continuous operation. When the operator needs to actively adjust the angle of the monitoring display screen 27, the controller 22 will adjust the output current according to the adjustment command. For example, the controller 22 switches the current of the ring coil to a low current state, such as 0.5A. The torque corresponding to the attraction force generated by the ring electromagnet 9 on the armature disk 1 is 12N·m, which is slightly higher than the maximum gravitational torque of the monitoring display screen 27 at any angle (10N·m). The safety factor is 1.2 times. Even during the adjustment process, the monitoring display screen 27 will not suddenly fall or rotate uncontrollably due to its own gravity. At the same time, the torque of 12N·m is much smaller than the fully locked torque of 20N·m, so that the operator only needs to apply a small external force to overcome the residual attraction force and easily push the monitoring display screen 27 to perform multi-degree-of-freedom adjustment. There is no need to worry that the monitoring display screen 27 will suddenly drop after releasing the hand, nor is it necessary to overcome excessive electromagnetic resistance. This improves the controllability and safety of the adjustment process.

[0025] Please see Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 7 , Figure 8 and Figure 9 An embodiment of the present invention provides a multi-degree-of-freedom adjustment device for a screen monitoring device, wherein the outer walls of the central shaft 5 are connected to the connecting rods 25 on both sides, the front end of the outer wall of the connecting rods 25 is connected to the fixing plate 26, the outer wall of the fixing plate 26 is connected to the monitoring display screen 27, and an adjustment button 28 is provided on the outer side of the monitoring display screen 27. The adjustment button 28 is connected to the controller 22 at the top of the outer wall of the connecting cylinder 21 through a connecting line. Furthermore, when the operator needs to adjust the angle of the monitoring display screen 27, they first press the adjustment button 28 located on the outside of the monitoring display screen 27. The adjustment button 28 has a conductive rubber contact structure inside. After being pressed, the contact closes, and the adjustment button 28 immediately sends an adjustment signal to the controller 22 through the connecting wire. After receiving the adjustment signal, the controller 22 quickly switches the power supply current of the ring coil from a large current (e.g., 2A) to a small current (e.g., 0.5A). By reducing the current, the electromagnetic attraction force generated by the ring electromagnet 9 on the armature disk 1 is reduced accordingly, causing the armature disk 1 to change from a fully locked state to a semi-released state. At this time, the armature disk 1 is still subject to attraction force. The attraction force can balance the gravitational torque generated by the monitoring display screen 27 at the current angle, but will not generate additional locking resistance. Under the small current state, the monitoring display screen 27 will not fall down by itself due to gravity, nor will the operator feel difficulty in rotating due to excessive attraction force. The operator only needs to apply a small external force to easily push the monitoring display screen 27, realizing multi-degree-of-freedom angle and position adjustment. While the operator presses and holds the adjustment button 28, the controller 22 continuously outputs a small current to keep the armature plate 1 in a semi-released state. At this time, the operator holds the edge of the monitoring display screen 27 or the fixing plate 26. When it is necessary to lift it upward, a pushing force is applied in the desired direction. Since the central shaft 5 is engaged with the armature plate 1 through the slot 2 and the locking block 6, when the electromagnetic attraction force on the armature plate 1 decreases, the central shaft 5 can overcome the residual attraction force and slowly rotate clockwise under the action of external force. The rotation of the central shaft 5 drives the connecting rod 25 and the fixing... The plate 26 and the monitoring display screen 27 rotate synchronously, thereby realizing continuous adjustment of the monitoring angle. The operator can obtain precise adjustment effect without deliberately controlling the force. At the same time, since the damping paddle 14 is still attracted in the groove 10 under the small current state, the magnetic force generated by the small current (such as 5N) is sufficient to overcome the elastic force (2N) of the return spring 13. The cylindrical rolling head 17 and the one-way ratchet 3 always remain in a non-contact state. Therefore, no mechanical friction noise or jamming will be generated during the adjustment process, which further improves the smoothness and quietness of the adjustment. After the operator completes the angle adjustment and adjusts the monitoring display screen 27 to a satisfactory position, they release the adjustment button 28. At this time, the conductive rubber contact inside the adjustment button 28 disconnects, and the adjustment signal disappears. Upon detecting the disappearance of the signal, the controller 22 immediately switches the current, re-outputting a large current to the toroidal coil in the toroidal electromagnet 9. The value of the large current is the same as that during stable operation of the equipment (e.g., 2A), which can generate a sufficiently strong electromagnetic attraction force to firmly attract and fix the armature plate 1. After the armature plate 1 is locked, due to the interlocking action of the slot 2 and the block 6, the central shaft 5 can no longer rotate, and the connecting rod 25, the fixing plate 26, and the monitoring display screen 27, which are fixedly connected to the central shaft 5, also... Stably locked at the newly set angle position, it will not produce impact or vibration, ensuring the stability of the monitoring screen. At the same time, after the controller 22 outputs a large current, it continues to monitor the torque value of the central shaft 5 through the torque sensor 18. If an abnormal torque is detected (for example, external disturbances cause the torque to exceed the preset threshold), the controller 22 will briefly increase the current to strengthen the locking effect. This avoids the cumbersome operation of manually tightening screws or turning the locking handle in traditional mechanical adjustment devices, improving adjustment efficiency and ease of operation. Moreover, there is always an electromagnetic attraction force during the adjustment process, so the monitoring display screen 27 will not suddenly fall or shake violently, ensuring the safety of the equipment and the user.

[0026] Please see Figure 1 , Figure 5 , Figure 7 , Figure 8 , Figure 10 , Figure 11 and Figure 12An embodiment of the present invention provides a multi-degree-of-freedom adjustment device for a screen monitoring device. The inner wall of the armature disk 1 is provided with symmetrically distributed slots 2. The inner wall of the slots 2 is in contact with the outer wall of the block 6. The outer wall of the central shaft 5 is provided with a first limiting disk 7 and a second limiting disk 8. The outer wall of the armature disk 1 is provided with a one-way ratchet 3. The one-way ratchet 3 is arranged in a circumferential array on the outer side of the armature disk 1. The rear side of the one-way ratchet 3 is an outer arc surface, and the front side of the one-way ratchet 3 is an inner arc surface. The inner arc surface of the one-way ratchet 3 is provided with a damping pad 4. Furthermore, when the equipment is in a stable operating state, the controller 22 outputs a large current, such as 2A, to the annular electromagnet 9. The annular coil inside the annular electromagnet 9 generates a strong magnetic field with uniform intensity and stable direction. The strong magnetic field acts on the armature disk 1 and the damping plate 14 at the same time. Under the action of the strong magnetic field, the damping plate 14 will be quickly attracted by the magnetic force. The magnitude of the magnetic force is such as 10N, which can easily overcome the maximum preload force (2N) of the return spring 13. Under the action of the magnetic force, the damping plate 14 compresses the return spring 13 and is completely housed in the groove 10 set in the inner wall of the annular electromagnet 9. At this time, the cylindrical rolling head 17 at the front end of the damping plate 14 and the one-way ratchet 3 on the outer side of the armature disk 1 remain in a non-contact state, avoiding friction noise and mechanical wear during normal operation, and ensuring the stability and quiet effect of the equipment during long-term operation. When the operator presses the adjustment button 28 to adjust the angle of the monitoring display screen 27, the output current of the controller 22 switches to a small current, such as 0.5A. Although the output current is greatly reduced, the attraction force (such as 5N) generated by the small current can still overcome the elastic force (2N) of the return spring 13, keeping the damping paddle 14 attracted inside the groove 10. This prevents the damping paddle 14 from accidentally popping out and contacting the one-way ratchet 3 during normal adjustment, which would cause the cylindrical rolling head 17 to rub or get stuck with the one-way ratchet 3, generating resistance and possibly making noise, seriously affecting the adjustment feel and user experience. Through the magnetic properties of the damping paddle 14 and the elastic force of the return spring 13, it is ensured that the damping paddle 14 remains in the retracted state during the process of switching from a large current to a small current, thus making the adjustment process smooth and unobstructed. When a device malfunctions and causes an unexpected power outage, the ring coil inside the ring electromagnet 9 completely loses current and cannot generate any magnetic field. At this time, the armature disk 1 loses its electromagnetic attraction and is in a freely rotatable state. The monitoring display screen 27 generates a downward gravitational torque under its own gravity. This torque will drive the central shaft 5 to rotate counterclockwise. The central shaft 5 engages with the armature disk 1, so the armature disk 1 also rotates counterclockwise. The one-way ratchet 3 on the outside of the armature disk 1 rotates counterclockwise synchronously. At the same time, the damping plate 14, having lost its electromagnetic attraction, is quickly ejected from the groove 10 under the drive of the elastic potential energy stored in the return spring 13, resetting the position. The spring force of spring 13 can push out the damping paddle 14 within 0.1 seconds after power failure, so that the cylindrical rolling head 17 at the front end of the damping paddle 14 can be engaged in the tooth groove of the one-way ratchet 3. The tooth profile of the one-way ratchet 3 is asymmetrical. When rotating counterclockwise, the inner arc surface of the front side of the ratchet tooth will be in close contact with the cylindrical rolling head 17, forming a self-locking mechanism, preventing the armature plate 1 from continuing to rotate counterclockwise, and preventing the monitoring display screen 27 from suddenly falling when the power is off. This avoids safety accidents such as damage to the monitoring display screen 27, deformation of the connecting rod 25, or injury to personnel. It achieves dual protection of electromagnetic locking and mechanical locking, and improves the reliability and safety of the equipment.

[0027] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 9 , Figure 10 , Figure 11 and Figure 12 An embodiment of the present invention provides a multi-degree-of-freedom adjustment device for a screen monitoring device, wherein the outer wall of the damping pad 4 is in contact with the outer wall of the cylindrical rolling head 17, the cylindrical rolling head 17 is fixed to the front end of the damping plate 14 by a rotating shaft, a return spring 13 is connected in the second circular groove 15 at the bottom end of the outer wall of the damping plate 14, the bottom end of the outer wall of the return spring 13 is set in the first circular groove 11, the first circular groove 11 is set at the bottom end of the inner wall of the groove 10 of the annular electromagnet 9, a fixed shaft 12 is set on the side of the inner wall of the groove 10, the outer wall of the fixed shaft 12 is fitted with the inner wall of the through hole 16, and the through hole 16 is set on the side of the outer wall of the damping plate 14; Furthermore, at the instant of a power outage, the reset spring 13 pushes the damping paddle 14 outward from the groove 10. The cylindrical rolling head 17 at the front end of the damping paddle 14 first contacts the inner arc surface on the front side of the one-way ratchet 3. The cylindrical rolling head 17 is made of bearing steel and has extremely high wear resistance and impact resistance. When the cylindrical rolling head 17 contacts the inner arc surface, both the cylindrical rolling head 17 and the inner arc surface are hard and smooth surfaces. At the moment of contact, rolling friction is the main force, which reduces the energy loss and surface scratches caused by sliding friction. This allows the damping paddle 14 to slide smoothly into the tooth groove of the one-way ratchet 3 without generating noise or causing deformation of parts due to violent impact. As the armature plate 1 continues to rotate counterclockwise by a small angle, the cylindrical rolling head 17 further penetrates into the bottom of the tooth groove and finally contacts the one-way ratchet 3. The damping pads 4 bonded to the front side are in contact with each other. The damping pads 4 are made of nitrile rubber and metal skeleton composite pressing. They can provide a static friction coefficient of 0.6 to 0.8 at the moment of contact, effectively absorbing impact energy and preventing the cylindrical rolling head 17 from slipping off. At this time, a reliable mechanical self-locking structure is formed between the damping paddle 14 and the one-way ratchet 3. The counterclockwise rotation of the armature disk 1 is completely stopped, and the central shaft 5 also stops rotating. The falling action of the monitoring display screen 27 is terminated instantly. The response time is less than 0.05 seconds. It can lock the screen when the falling distance is less than 1mm, which minimizes the accidental displacement of the screen and avoids collision between the screen and surrounding equipment or damage to internal components due to severe vibration. It achieves high reliability and safety of the equipment under extreme failure conditions. When power is restored, the operator needs to reset the adjustment device to release the mechanical lock and return the damping lever 14 to the groove 10, preparing for the next possible power outage. First, the controller 22 detects the power restoration and automatically energizes the ring coil inside the ring electromagnet 9 via the connecting wire, outputting a large current (e.g., 2A). The strong magnetic field generated by the large current produces an attraction force of approximately 50N on the armature plate 1, and simultaneously generates a magnetic attraction force of approximately 5N on the damping lever 14. However, since the damping lever 14 is still stuck in the tooth groove of the one-way ratchet 3, the magnetic attraction alone cannot overcome the mechanical obstruction of the tooth groove. Therefore, the operator needs to actively intervene to reset it. The operator first presses the adjustment button 28 on the outside of the monitoring display screen 27. The adjustment button 28 sends a reset adjustment signal to the controller 22. After receiving the signal, the controller 22 changes the ring coil... The current of the coil is output as a small current. Then, the operator holds the two sides of the monitoring display screen 27 and slowly and steadily lifts the monitoring display screen 27 upward. The lifting action causes the central shaft 5 to rotate clockwise, and the armature disk 1 also rotates clockwise. Since the tooth shape of the one-way ratchet 3 is asymmetrical, its front side is an inner arc surface (for counterclockwise locking) and its rear side is an outer arc surface (for clockwise release). When the armature disk 1 rotates clockwise, the cylindrical rolling head 17 contacts the outer arc surface. The outer arc surface is designed as a smooth involute surface, so that the cylindrical rolling head 17 can gradually roll outward along the surface when subjected to radial thrust. At the same time, the strong magnetic field generated by the annular electromagnet 9 continuously applies an inward attraction force to the damping plate 14. The attraction force and the outward thrust of the cylindrical rolling head 17 form a resultant force, which helps the damping plate 14 overcome the elastic force of the return spring 13 and gradually retract into the groove 10. When the monitoring display screen 27 is lifted, the cylindrical rolling head 17 completely disengages from the tooth groove area of ​​the one-way ratchet 3. Under the action of magnetic attraction, the damping paddle 14 quickly retracts into the groove 10. At this time, the cylindrical rolling head 17 at the front end of the damping paddle 14 and the one-way ratchet 3 return to a non-contact state. The rotation of the armature plate 1 is no longer mechanically hindered. The operator then releases the adjustment button 28. After the controller 22 detects the disappearance of the button signal, it continues to maintain a large current output, firmly adsorbing the armature plate 1. The central shaft 5 is locked, and the monitoring display screen 27 is stabilized in the reset angle position. The entire reset process is simple to operate, without disassembling any outer shell or using special tools. The operator can complete it within tens of seconds, ensuring that in the event of the next accidental power failure, the damping paddle 14 can still quickly pop out and reliably engage with the ratchet tooth groove, thereby continuously providing mechanical safety protection. It achieves frictionless and low-noise smooth locking and adjustment, which is suitable for screen monitoring scenarios with high requirements for continuous operation reliability, such as traffic dispatch centers, security monitoring rooms, and medical surgical auxiliary displays.

[0028] Working principle: When the equipment is working, the controller 22 energizes the ring coil inside the ring electromagnet 9 to generate a uniform and stable magnetic field. During normal operation, the controller 22 outputs a large current (such as 2A), and the magnetic field generates a strong attraction force on the armature disk 1, such as 50N, corresponding to a locking torque of 20N·m, which is greater than the maximum gravitational torque of the monitoring display screen 27 (10N·m), thereby firmly attracting the armature disk 1 and preventing the armature disk 1 from rotating. The armature disk 1 drives the central shaft 5 to lock through the slot 2 and the locking block 6. The monitoring display screen 27 is stabilized at a preset angle through the connecting rod 25 and the fixing plate 26. At the same time, the magnetic field draws the damping plate 14 into the groove 10, compresses the return spring 13, and keeps the cylindrical rolling head 17 and the one-way ratchet 3 from contacting each other. When the angle needs to be adjusted, press the adjustment button 28. The controller 22 switches the current to a small current (such as 0.5A), and the torque corresponding to the adsorption force drops to 12N·m, which is still slightly higher than the gravitational torque, so that the armature disk 1 is in a semi-released state. At this time, the operator can easily push the monitoring display screen 27 to rotate and realize multi-degree-of-freedom adjustment. After releasing the button, the controller 22 restores the large current and locks the new position again. In the event of an unexpected power outage, the annular electromagnet 9 loses its magnetic force, and the reset spring 13 quickly ejects the damping plate 14. The cylindrical rolling head 17 engages in the tooth groove of the one-way ratchet 3, and the asymmetrical tooth shape of the one-way ratchet 3 forms a mechanical self-lock, preventing the armature plate 1 from rotating counterclockwise and preventing the monitoring display screen 27 from falling. After the power is restored, the operator presses the adjustment button 28 and lifts the monitoring display screen 27 upward, causing the damping plate 14 to retract into the groove 10 under the assistance of the magnetic field, thus completing the reset.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-degree-of-freedom adjustment device for a screen monitoring equipment, comprising an armature plate (1), a ring electromagnet (9), and a damping lever (14), characterized in that: The armature disk (1) is engaged with the cylindrical rolling head (17) of the damping paddle (14) by the one-way ratchet (3) on the outside. The damping paddle (14) is fixed in the groove (10) by the fixed shaft (12). The damping paddle (14) is connected to the annular electromagnet (9) by the return spring (13). The annular coil inside the annular electromagnet (9) is connected to the external controller (22) by the connecting line. The annular electromagnet (9) is sleeved on the outside of the armature disk (1). The armature disk (1) is fixed on the central shaft (5) by the first limiting disk (7) and the second limiting disk (8). The first bearing (19) and the second bearing (20) on the central shaft (5) are connected to the connecting cylinder (21). The controller (22) on the connecting cylinder (21) is connected to the adjustment button (28) on the monitoring display screen (27) by the connecting line.

2. The multi-degree-of-freedom adjustment device for a screen monitoring equipment according to claim 1, characterized in that: The armature disk (1) is circular. The inner wall of the armature disk (1) is provided with symmetrically distributed slots (2). The slots (2) are rectangular. The inner wall of the slots (2) is in contact with the outer wall of the block (6). The blocks (6) are symmetrically arranged on the outer wall of the central shaft (5). The outer wall of the central shaft (5) is provided with a first limiting disk (7) and a second limiting disk (8). The armature disk (1) is fixed between the first limiting disk (7) and the second limiting disk (8).

3. The multi-degree-of-freedom adjustment device for a screen monitoring equipment according to claim 2, characterized in that: The armature disk (1) has a one-way ratchet (3) on its outer side wall. The one-way ratchet (3) is arranged in a circular array on the outer side of the armature disk (1). The rear side of the one-way ratchet (3) is an outer arc surface, and the front side of the one-way ratchet (3) is an inner arc surface. The inner arc surface of the one-way ratchet (3) is provided with a damping pad (4).

4. The multi-degree-of-freedom adjustment device for a screen monitoring equipment according to claim 3, characterized in that: The outer wall of the damping pad (4) is in contact with the outer wall of the cylindrical rolling head (17). The cylindrical rolling head (17) is fixed to the front end of the damping paddle (14) by a rotating shaft. A second circular groove (15) is provided at the bottom end of the outer wall of the damping paddle (14). A reset spring (13) is connected in the second circular groove (15). The top end of the outer wall of the reset spring (13) is located in the second circular groove (15), and the bottom end of the outer wall of the reset spring (13) is located in the first circular groove (11).

5. A multi-degree-of-freedom adjustment device for a screen monitoring equipment according to claim 4, characterized in that: The first circular groove (11) is set at the bottom of the inner wall of the groove (10). The groove (10) is set on the inner wall of the annular electromagnet (9). The grooves (10) are arranged in a circular array on the inner wall of the annular electromagnet (9). A fixed shaft (12) is set on the side of the inner wall of the groove (10). The outer wall of the fixed shaft (12) is fitted with the inner wall of the through hole (16). The through hole (16) is set on the side of the outer wall of the damping plate (14). The through hole (16) enters from the left side of the outer wall of the damping plate (14) and exits from the right side of the outer wall of the damping plate (14). The damping plate (14) is fixed in the groove (10) by the fixed shaft (12).

6. The multi-degree-of-freedom adjustment device for a screen monitoring equipment according to claim 5, characterized in that: The annular electromagnet (9) has an annular groove inside, which is a closed loop along the circumference of the annular electromagnet (9). An annular coil is provided in the annular groove, which is evenly arranged around the annular groove. A connecting wire is provided at the end of the annular coil, which passes through the annular electromagnet (9) and is connected to the controller (22).

7. A multi-degree-of-freedom adjustment device for a screen monitoring equipment according to claim 6, characterized in that: The annular electromagnet (9) is fixed on the inner side of the connecting cylinder (21). The outer sides of the connecting cylinder (21) are provided with a third circular groove (23). The inner walls of the third circular groove (23) on both sides of the connecting cylinder (21) are respectively fitted with the outer walls of the first bearing (19) and the second bearing (20). The first bearing (19) and the second bearing (20) have the same structural size. The inner walls of the first bearing (19) and the second bearing (20) are fitted with the outer wall of the central shaft (5).

8. A multi-degree-of-freedom adjustment device for a screen monitoring equipment according to claim 7, characterized in that: The central shaft (5) is connected to the torque sensor (18), which is located outside the first limiting plate (7). The torque sensor (18) is fixed inside the connecting cylinder (21). The inner wall of the connecting cylinder (21) and the outer wall of the torque sensor (18) are fitted together. A connecting line is provided on the outer wall of the torque sensor (18). The connecting line of the torque sensor (18) passes through the connecting cylinder (21) and is connected to the controller (22). The controller (22) is located at the top of the outer wall of the connecting cylinder (21), and a support rod (24) is provided at the bottom of the outer wall of the connecting cylinder (21).

9. A multi-degree-of-freedom adjustment device for a screen monitoring equipment according to claim 8, characterized in that: The outer walls of the central shaft (5) are connected to the connecting rod (25) on both sides. The front end of the outer wall of the connecting rod (25) is connected to the fixing plate (26). The fixing plate (26) is rectangular and the outer wall of the fixing plate (26) is connected to the monitoring display screen (27).

10. A multi-degree-of-freedom adjustment device for a screen monitoring equipment according to claim 9, characterized in that: An adjustment button (28) is provided on the outside of the monitoring display screen (27), and a connecting line is provided on the inside of the adjustment button (28). The connecting line of the adjustment button (28) is connected to the controller (22) at the top of the outer wall of the connecting cylinder (21).

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