Device for preventing curtain from being pulled by mistake for terminal strip

Abstract

The invention discloses a device for preventing a curtain from being pulled by mistake for a terminal strip, and relates to the technical field of electric power operation safety tools, flexible deployment is facilitated through movable connection of a curtain pulling rolling box and the terminal strip, and protection requirements of terminal strips with different lengths are met through the telescopic characteristic of a shielding curtain. The fixing effect of the electronic locking box effectively prevents the shielding curtain from moving or falling off accidentally, the problem that in the prior art, shielding measures are insufficient in fastening performance and prone to falling off, so that effective shielding cannot be achieved is thoroughly solved, reliable shielding of the terminal row in operation is ensured, mistaken touch of operators is prevented, and the working efficiency is improved. The personal and equipment safety guarantee level during secondary circuit operation is also improved; and meanwhile, the applicability in complex operation environments such as multiple equipment on the same screen is also enhanced by a flexible adjusting and fixing mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power operation safety tools, and particularly relates to a terminal row mistaken-pulling curtain device. BACKGROUND

[0002] With the rapid development of the power industry, there are multiple devices on the same screen in 35kV protection, 110kV protection, and measurement and control devices of a substation, in the operation environment of multiple devices on the same screen and only part of the devices being powered off, the operator is easy to walk to the wrong terminal row and device, causing mistaken short-circuit, mistaken wiring, and mistaken disconnection, resulting in device power-off accidents, and there is a high operation risk.

[0003] The current secondary terminal row sealing safety measures mainly include hanging a short red cloth curtain, pasting adhesive tape or insulating tape with the word "running", and using paper and other non-standard materials for shielding, but there is a problem of insufficient fastening, which leads to the situation of falling off, and the shielding cannot be effectively performed, endangering personal and equipment safety. SUMMARY

[0004] The present application provides a terminal row mistaken-pulling curtain device, which solves the technical problem of insufficient fastening of the shielding measures for the secondary terminal row in the prior art, which leads to the situation of falling off, and the shielding cannot be effectively performed.

[0005] The present application provides a terminal row mistaken-pulling curtain device, which includes a curtain pulling box, a shielding curtain, and an electronic locking box.

[0006] The curtain pulling box is installed on the terminal row and movably connected with the terminal row.

[0007] The shielding curtain can be retracted and wound in the curtain pulling box.

[0008] The shielding curtain has a first state of extending out of the curtain pulling box.

[0009] When the shielding curtain is in the first state, the electronic locking box is fixed on the terminal row shielded by the shielding curtain.

[0010] Optionally, the terminal row is installed on a terminal row guide rail.

[0011] Both ends of the terminal row are provided with clamping mechanisms.

[0012] When the shielding curtain is in the first state, the curtain pulling box is clamped with the clamping mechanism at one end of the terminal row through a hanging ring.

[0013] One end of the shielding curtain extending out is clamped with the clamping mechanism at the other end of the terminal row through a hanging ring.

[0014] Optionally, it further includes:

[0015] The blind curtain has a second state in which it is rolled up into the curtain roll box;

[0016] When the blind is in the second state, the hanging ring at the extended end of the blind is separated from the snap-fit ​​mechanism.

[0017] Optionally, the curtain roll box includes a curtain box cover, a bottom plate, an inner shaft, an outer shaft cylinder, and a left end plug;

[0018] The base plate is provided with fixed terminals;

[0019] A ball bearing track post is installed on the left side of the inner shaft, and the ball bearing track post is connected to the fixed terminal on the left side.

[0020] The left end plug is fitted onto the end of the ball track column;

[0021] A coil spring is installed on the right side of the inner shaft, and the coil spring is connected to the fixed terminal on the right side.

[0022] The outer shaft sleeve is fitted onto the outer surface of the inner shaft;

[0023] The shielding curtain is wound around the outer surface of the outer shaft cylinder;

[0024] The curtain box cover is detachably connected to the base plate.

[0025] Optionally, the electronic locking box includes an electronic combination lock, a card holder cover, and a card holder bottom;

[0026] The electronic combination lock is installed on the upper surface of the card holder cover;

[0027] The card holder cover is hinged to the card holder bottom;

[0028] The card holder cover has an inverted U-shaped structure;

[0029] The bottom of the card holder box has a bottom through groove;

[0030] The bottom through groove is provided with an elastic snap-fit ​​mechanism for clamping the terminal block;

[0031] The elastic locking mechanism includes a first latch and a second latch;

[0032] The elastic latching mechanism has a third state in which the first latch and the second latch are far apart from each other, and a fourth state in which the first latch and the second latch are close together.

[0033] Optionally, the elastic snap-fit ​​mechanism further includes a connecting shaft and a spring;

[0034] The first buckle includes a first vertical plate and a first horizontal elongated base;

[0035] The first vertical plate is located on the left side of the first horizontal elongated base;

[0036] The first horizontal elongated base has a through rectangular hollowed-out groove along its length.

[0037] The first horizontal strip base has a first bend on its right side, and the first bend bends downward toward the direction of the first vertical plate on the left.

[0038] The second buckle includes a second vertical plate and a second horizontal strip base;

[0039] The second vertical plate is located on the right side of the second horizontal elongated base;

[0040] The second horizontal elongated base is adapted to the inner cavity size of the through rectangular hollow groove;

[0041] The second horizontal elongated base is embedded in the through rectangular hollow groove, and the second horizontal elongated base can slide along the inner cavity of the through rectangular hollow groove.

[0042] The second horizontal strip base has a second bend on its left side, and the second bend bends downward toward the direction of the second vertical plate on the right.

[0043] The left end of the connecting shaft passes through the pre-set shaft hole on the first bend and connects to the left side of the bottom of the card holder box;

[0044] The right end of the connecting shaft passes through a pre-set shaft hole on the second bend and connects to the right side of the bottom of the card holder box;

[0045] The spring is sleeved on the outer surface of the connecting shaft, and the spring is placed inside the through rectangular hollow groove;

[0046] The spring is used to form an elastic contact engagement with the first buckle and the second buckle;

[0047] When the elastic snap-fit ​​mechanism is in the third state, the first upright plate and the second upright plate respectively abut against the two sides of the clip box cover, and the first bent part and the second bent part are in a closed state, forming a U-shaped snap-fit ​​space for snapping the terminal block.

[0048] When the elastic snap-fit ​​mechanism is in the fourth state, the first bent portion and the second bent portion are in a separated state.

[0049] Optionally, the electronic combination lock includes a lock body module, a control module, an input module, a drive module, and a power supply module;

[0050] The input module is used to receive input signals, verify them, and generate verification results;

[0051] The control module is used to generate an unlock command when the verification result is passed, and to generate a lock command when the verification result is failed.

[0052] The drive module is used to drive the lock body module to perform locking or unlocking operations with the lock tongue engaging slot installed on the bottom of the card holder box according to the unlocking command or the locking command.

[0053] The power module is used to provide operating power for the electronic combination lock.

[0054] Optionally, the lock body module includes a solid lock body and a bolt;

[0055] The solid lock body is provided with the lock tongue;

[0056] When the drive module receives the locking command, it drives the bolt to engage with the bolt locking slot.

[0057] When the drive module receives the unlock command, it drives the latch to separate from the latch slot.

[0058] Optionally, the snap-fit ​​mechanism includes a hanging ring clamp and a T-shaped fixing block;

[0059] The T-shaped fixing block is mounted on the terminal block guide rail;

[0060] The clamping arm of the hanging ring clamp is provided with a limiting groove that is adapted to the hanging ring;

[0061] The hanging ring is embedded in the limiting groove, and the clamping arm of the hanging ring clamp is clamped and connected to the top of the T-shaped fixing block.

[0062] Optionally, the material of the shielding curtain is an insulating material.

[0063] As can be seen from the above technical solutions, the present invention has the following advantages:

[0064] This invention forms a complete protective structure through a curtain roll box movably connected to the terminal block, a retractable shielding curtain retractable within the curtain roll box, and an electronic locking box fixed to the shielded terminal block when the shielding curtain is in its extended first state. The shielding curtain is infinitely adjustable in length and wider than the terminal block, completely shielding the terminal block in operation. The electronic locking box further locks the shielding state. This device facilitates flexible deployment through the movable connection between the curtain roll box and the terminal block. The telescopic characteristics of the shielding curtain adapt to the protection needs of terminal blocks of different lengths, while the fixing function of the electronic locking box effectively prevents accidental displacement or detachment of the shielding curtain. It completely solves the problems of insufficient tightness and easy detachment in existing shielding measures, leading to ineffective shielding. This not only ensures reliable shielding of the terminal block in operation and prevents accidental contact by operators, but also improves the safety of personnel and equipment during secondary circuit operations. Furthermore, its flexible adjustment and fixing methods enhance its applicability in complex operating environments such as multiple devices operating simultaneously. Attached Figure Description

[0065] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0066] Figure 1 This is a structural diagram of the terminal block anti-misoperation curtain device according to an embodiment of the present invention;

[0067] Figure 2 This is a schematic diagram of the shielding curtain in a first state according to an embodiment of the present invention;

[0068] Figure 3 This is an exploded view of the curtain roller box according to an embodiment of the present invention;

[0069] Figure 4 This is a detailed view of the snap-fit ​​mechanism according to an embodiment of the present invention;

[0070] Figure 5 This is an exploded view of the electronic locking box according to an embodiment of the present invention;

[0071] Figure 6 This is a schematic diagram of the first snap-fit ​​structure according to an embodiment of the present invention;

[0072] Figure 7 This is a schematic diagram of the second snap-fit ​​structure according to an embodiment of the present invention;

[0073] Figure 8 This is a schematic diagram of the U-shaped snap-fit ​​space according to an embodiment of the present invention;

[0074] Figure 9This is a schematic diagram of the first closing of the electronic locking box according to an embodiment of the present invention;

[0075] Figure 10 This is a schematic diagram of the second closing of the electronic locking box according to an embodiment of the present invention;

[0076] Figure 11 This is a schematic diagram of the opening of the electronic locking box according to an embodiment of the present invention;

[0077] Figure 12 This is a schematic diagram of the locking tongue and locking tongue engaging groove in an embodiment of the present invention;

[0078] Figure 13 This is a schematic diagram illustrating the separation of the locking tongue and the locking tongue engagement groove in an embodiment of the present invention;

[0079] Figure 14 This is an installation effect diagram of the electronic locking box according to an embodiment of the present invention;

[0080] Figure 15 This is a schematic diagram of the electronic combination lock structure according to an embodiment of the present invention;

[0081] Figure 16 This is a circuit diagram of an electronic combination lock according to an embodiment of the present invention.

[0082] The meanings of the reference numerals in the attached figures are as follows:

[0083] 1. Hanging ring clip; 2. Curtain roller box; 3. Shelter curtain; 4. Electronic locking box; 5. T-shaped fixing block; 6. Limiting groove; 7. Hanging ring; 8. Terminal block guide rail; 9. Terminal block; 10. Curtain box cover; 11. Base plate; 12. Inner shaft; 13. Fixed terminal; 14. Coil spring; 15. Outer shaft cylinder; 16. Left end plug; 17. Ball bearing track column; 18. Electronic combination lock; 19. Card holder box cover; 20. First buckle; 21. Second buckle; 22. Card holder box bottom; 23. Connecting shaft; 24. 25. Spring; 26. First upright plate; 27. First horizontal long strip base; 28. Through rectangular hollow groove; 29. ​​First bend; 20. Second upright plate; 31. Second horizontal long strip base; 32. Second bend; 33. U-shaped snap-fit ​​space; 34. Solid lock body; 35. Lock tongue; 36. Fixing screw; 37. Anti-slip pad; 38. Washer; 39. Hexagonal nut; 40. Battery compartment; 41. Button battery; 42. Touch keypad; 43. Lock tongue snap-fit ​​groove; 44. Bottom through groove. Detailed Implementation

[0084] This invention provides a terminal block anti-misoperation curtain device to solve the technical problem that the existing shielding measures for secondary terminal blocks have insufficient fastening, resulting in detachment and ineffective shielding.

[0085] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0086] Current safety measures for sealing secondary terminal blocks mainly involve hanging short red cloth curtains, affixing tape or insulating tape with the words "In Operation" on it, and using non-standard materials such as paper for covering. However, all of these measures have significant drawbacks: 1. Small coverage area. Short red cloth curtains only serve a warning function and do not provide complete coverage of the terminal blocks in operation. This makes it easy for operators to accidentally touch exposed live parts or accidentally short-circuit the operating terminals. The small coverage area and poor safety endanger personal and equipment safety. 2. Low reliability. Short red cloth curtains are prone to falling off, and insufficient adhesiveness of insulating tape can lead to detachment. If the adhesiveness is too strong, the operating wiring may be loosened or the terminal markings may be torn off during restoration. 3. Poor sealing standardization. The application of simple coverings such as paper varies from person to person, resulting in poor sealing standardization and stability. They are easily damaged, detached, or flipped open, exposing the operating terminals and failing to achieve the sealing and anti-misoperation function, thus endangering equipment operation safety.

[0087] This invention achieves full coverage of terminal block 9 in its first state through a retractable shielding curtain 3, solving the problem of incomplete coverage in existing shielding measures. It can accurately isolate operating and non-operating equipment in working environments with multiple devices on the same screen and partial power outages, preventing operators from accidentally walking onto the wrong terminal block 9 and causing misoperation. At the same time, the stable installation of the curtain roll box 2 and the snap-fit ​​fixing of the electronic locking box 4 replace non-standard materials such as short red cloth curtains that are easy to fall off and tapes with insufficient or excessive adhesiveness. This not only eliminates the risk of shielding materials falling off, but also prevents damage to terminal wiring and markings during restoration, improving reliability. Furthermore, the integrated structural design standardizes shielding operation, changing the situation where the application of shielding materials varies from person to person in the past, enhancing the standardization of sealing, and thus effectively reducing the operational risks of equipment power outages caused by accidental short circuits, incorrect wiring, or accidental disconnection.

[0088] Please see Figures 1-16 The present invention provides a terminal block anti-misoperation curtain device, including a curtain roller box 2, a shielding curtain 3 and an electronic locking box 4;

[0089] The curtain roller box 2 is installed on the terminal block 9 and is movably connected to the terminal block 9;

[0090] The blind curtain 3 can be retracted and rolled up inside the curtain roll box 2;

[0091] The blind curtain 3 has a first state in which the curtain roll box 2 is extended;

[0092] When the shielding curtain 3 is in the first state, the electronic locking box 4 is fixed on the terminal block 9 which is shielded by the shielding curtain 3.

[0093] Secondary terminals are electrical components used in power systems, electrical control systems, and other fields to connect secondary circuit conductors. In a secondary circuit, numerous conductors from different devices (such as relays, instruments, protection devices, control switches, etc.) need to be interconnected. Secondary terminal blocks can systematically gather and distribute these conductors, enabling electrical connections between different devices, forming a complete secondary circuit, and ensuring signal transmission and control functions.

[0094] It should be noted that the secondary terminal block is hereinafter referred to as terminal block 9. The width of the shielding curtain 3 is greater than the width of the terminal block 9. The width of the shielding curtain 3 is 6cm, so as to achieve complete shielding of the width direction of the terminal block 9. The shielding curtain 3 can be infinitely adjusted in length by pulling. The weight of the entire terminal block anti-misoperation curtain device does not exceed 1.0kg.

[0095] In this embodiment of the invention, the shielding curtain 3 has a first state of extending out of the curtain roll box 2. This first state refers to the state when the shielding curtain 3 extends out of the curtain roll box 2. In operation scenarios where multiple devices are on the same screen and only some devices are powered down, to prevent operators from accidentally touching the terminals of the operating equipment, precise shielding protection is required for the terminal blocks 9 corresponding to the operating equipment. At this time, the shielding curtain 3 is pulled out of the curtain roll box 2, and its width is greater than the width of the terminal block 9, completely covering the operating terminal block 9 in the width direction. Combined with the stepless length adjustment function, it adapts to the protection requirements of terminal blocks 9 of different lengths. After the shielding curtain 3 completes shielding in the first state, the electronic locking box 4 is fixed to the shielded terminal block 9, locking the protection state through electronic locking to prevent the shielding curtain 3 from accidentally shifting or falling off, ensuring that the operating terminal block 9 is always reliably shielded during operation. This solves the problems of poor fastening and easy failure of traditional protection methods, building a solid safety barrier for personnel and equipment in secondary circuit operations.

[0096] Please see Figure 1 , Figure 2 , Figure 4 and Figure 14 The present invention provides a terminal block anti-misoperation curtain device, wherein the terminal block 9 is installed on the terminal block guide rail 8;

[0097] Both ends of terminal block 9 are equipped with snap-fit ​​mechanisms;

[0098] When the blind curtain 3 is in the first state, the curtain roller box 2 is engaged with the terminal block 9 by the hook ring 7 through the engagement mechanism.

[0099] One end of the blind curtain 3 extends and is engaged with the other end of the terminal block 9 via a locking mechanism using a hanging ring 7.

[0100] In this embodiment of the invention, both ends of the terminal block 9 are provided with a snap-fit ​​mechanism. The terminal block 9 is installed on the terminal block guide rail 8, and the snap-fit ​​mechanism is also installed on the terminal block guide rail 8. When the blind curtain 3 is in the first state, a hanging ring 7 is fixed on one side of the curtain roller box 2. The hanging ring 7 is snapped with the snap-fit ​​mechanism at one end of the terminal block 9. One end of the terminal block 9 refers to the end close to the curtain roller box 2. The end of the blind curtain 3 that extends out is snapped with the snap-fit ​​mechanism at the other end of the terminal block 9 through the hanging ring 7. The end of the blind curtain 3 that extends out refers to the end away from the curtain roller box 2.

[0101] It should be noted that the connection between the snap-fit ​​mechanism and the terminal block guide rail 8 adopts a detachable design, which not only ensures the stability during installation but also facilitates flexible disassembly and re-fixing later according to the addition, removal, or position adjustment of the terminal blocks 9. This structure allows the entire anti-misoperation curtain device to be adapted to terminal block assemblies of different lengths, greatly improving the versatility of the device.

[0102] Meanwhile, when the blind curtain 3 switches from the first state to the second state (i.e., rolled up and stored), the curtain roll box 2 will roll up the blind curtain 3. At this time, the hanging ring 7 located at the protruding end of the blind curtain 3 can be fixed by the hook specially set on the curtain roll box 2 to prevent it from shaking randomly and affecting the normal operation of other equipment. This structure further enhances the stability and reliability of the device in practical applications.

[0103] It is worth mentioning that, firstly, the shielding curtain 3 has printed warning labels on its surface. In its first state, the shielding curtain 3 effectively shields the terminal block 9, preventing electrical faults or safety accidents caused by accidental contact or pulling of the terminal block 9 wiring. This provides a reliable guarantee for the stable operation of the electrical system and significantly improves operational safety. Secondly, the detachable design of the snap-fit ​​mechanism allows the device to be flexibly adjusted according to changes in the actual number and position of the terminal blocks 9, without needing to replace the entire device due to the addition or removal of terminal blocks 9. This greatly improves the reusability of the equipment, reduces operating costs, and enhances the adaptability and flexibility of the device. Simultaneously, the hanging... The optimized snap-fit ​​design of the ring 7 and the snap-fit ​​mechanism makes the installation and removal of the shielding curtain 3 simple and labor-saving. The staff can complete the operation quickly without the need for complicated tools, which significantly shortens the operation time. This advantage is particularly prominent when the terminal block 9 needs to be frequently inspected or maintained, improving the convenience and efficiency of operation. Finally, when the shielding curtain 3 is switched to the second state, the extended end hanging ring 7 is fixed by the hook on the curtain roll box 2, which prevents the hanging ring 7 from swinging around and colliding or getting tangled with other parts. This reduces interference factors during equipment operation, helps maintain the stable operation of the entire electrical system, and ensures the stability of equipment operation.

[0104] The present invention provides a terminal block anti-accidental curtain device, which further includes:

[0105] The blind curtain 3 has a second state in which it is rolled up into the curtain roll box 2;

[0106] When the blind curtain 3 is in the second state, the hanging ring 7 at the extended end of the blind curtain 3 separates from the locking mechanism.

[0107] In this embodiment of the invention, the blind curtain 3 has a second state in which it is rolled up into the curtain roll box 2. It can be understood that the second state refers to the state in which the blind curtain 3 is rolled up into the curtain roll box 2. In this state, except that the hanging ring 7 at the protruding end of the blind curtain 3 is separated from the locking mechanism, the hanging ring 7 of the curtain roll box 2 itself can still maintain the connection with the locking mechanism at one end of the terminal block 9. This will not affect the fixation of the curtain roll box 2, and will allow the entire device to maintain a relatively stable state when the terminal block 9 is not covered.

[0108] It is worth mentioning that when the shielding curtain 3 is in the second state, the shielding curtain 3, which is rolled up into the curtain roll box 2, does not take up too much space, thus providing ample working area for the maintenance and wiring of the terminal block 9, making it convenient for staff to perform related operations. Moreover, this rolling design can also provide a certain degree of protection for the shielding curtain 3, reducing wear and contamination caused by exposure to the outside, and extending the service life of the shielding curtain 3.

[0109] In addition, the switching between the first and second states of the shielding curtain 3 is very smooth. The staff only needs to operate the connection or separation of the hanging ring 7 and the snap-fit ​​mechanism, and with the winding function of the curtain roll box 2, the state change can be completed quickly, which meets the needs of shielding or exposing the terminal block 9 in different scenarios, and further improves the practicality of the device.

[0110] Please see Figure 3 The present invention provides a terminal block anti-misoperation curtain device, wherein the curtain roll box 2 includes a curtain box cover 10, a bottom plate 11, an inner shaft 12, an outer shaft cylinder 15 and a left end plug 16;

[0111] The base plate 11 is provided with fixed terminals 13.

[0112] A ball bearing track post 17 is mounted on the left side of the inner shaft 12, and the ball bearing track post 17 is connected to the fixed terminal 13 on the left side.

[0113] The left end plug 16 is fitted onto the end of the ball track column 17;

[0114] A coil spring 14 is mounted on the right side of the inner shaft 12, and the coil spring 14 is connected to the fixed terminal 13 on the right side.

[0115] An outer shaft sleeve 15 is fitted onto the outer surface of the inner shaft 12;

[0116] The outer surface of the outer shaft cylinder 15 is wound with a shielding curtain 3;

[0117] The curtain box cover 10 is detachably connected to the base plate 11.

[0118] It should be noted that the pulley structure inside the curtain roller box 2 is centered on the shaft. The outer shaft cylinder 15 is fitted onto the inner shaft 12, and the outer curtain 3 is wound around the outer surface of the outer shaft cylinder 15. The coil spring 14 is installed at the right end of the inner shaft 12 and connected to the right-side fixed terminal 13. The ball track column 17 is installed at the left end of the inner shaft 12 and connected to the left-side fixed terminal 13. The left end plug 16 is closed and fixed, forming a pulley structure for rolling up or extending the curtain 3.

[0119] Specific working principle:

[0120] When the blind curtain 3 needs to be unfolded to put the device in the first state, the operator pulls the extended end of the blind curtain 3 outward. At this time, the blind curtain 3, which is wound around the outer surface of the outer shaft cylinder 15, drives the outer shaft cylinder 15 to rotate. The outer shaft cylinder 15, which is sleeved on the outer surface of the inner shaft 12, further drives the inner shaft 12 to rotate synchronously. The coil spring 14 connected to the right side of the inner shaft 12 is twisted as the inner shaft 12 rotates. The coil spring 14 generates elastic potential energy due to deformation and is in an energy storage state. At the same time, the ball bearing track column 17 on the left side of the inner shaft 12 is connected to the left fixed terminal 13. When the ball bearing track column 17 rotates with the inner shaft 12, its cooperation with the left end plug 16 ensures the smoothness of the rotation of the left side of the inner shaft 12, reduces the frictional resistance during the rotation process, and makes the pulling process of the blind curtain 3 smoother.

[0121] When the blind curtain 3 needs to be rolled up to switch to the second state, the operator disconnects the hanging ring 7 at the extended end of the blind curtain 3 from the locking mechanism. At this time, the coil spring 14 on the right side of the inner shaft 12 releases the previously stored elastic potential energy, causing the inner shaft 12 to rotate in the opposite direction. The reverse rotation of the inner shaft 12 is transmitted to the outer shaft cylinder 15 through its sleeve relationship with the outer shaft cylinder 15, causing the outer shaft cylinder 15 to rotate in the opposite direction as well, thereby rewinding the blind curtain 3 onto its outer surface. During this process, the ball bearing track post 17 on the left side of the inner shaft 12 continues to cooperate with the left end plug 16 to ensure the stability of the reverse rotation of the inner shaft 12 and avoid jamming.

[0122] The fixing terminals 13 on the base plate 11 fix the ball bearing track column 17 and the coil spring 14, ensuring that these two key components remain stable during operation and do not shift due to the rotation of the inner shaft 12. The curtain box cover 10 is detachably connected to the base plate 11, which protects the internal components such as the inner shaft 12, outer shaft cylinder 15, and coil spring 14 from dust and impurities affecting operation, and also facilitates disassembly, repair, or replacement in case of component failure. Throughout the process, each component has a clear division of labor, and the automatic rolling and stable unfolding of the curtain 3 is achieved through the linkage of the mechanical structure, ensuring the reliable operation of the device.

[0123] It is worth mentioning that the double-layer nested structure of the inner shaft 12 and the outer shaft cylinder 15 firstly ensures the regularity of the winding trajectory of the shielding curtain 3, avoiding the problems of curtain wrinkles and offsets that are easy to occur when the traditional single-layer shaft is wound. This allows the shielding curtain 3 to flatly cover the surface of the terminal block 9 when it is unfolded, thereby improving the reliability of protection. At the same time, this structure also provides a stable foundation for the efficient operation of other components.

[0124] The mating structure of the left ball bearing track column 17 and the left end plug 16 reduces the resistance coefficient when the inner shaft 12 rotates by replacing sliding friction with rolling friction. This not only makes the stretching and rolling of the curtain 3 easier and facilitates the staff to quickly switch the device status, but also reduces mechanical wear between components. Together with the double-layer nested structure, it extends the overall service life of the device.

[0125] The connection between the coil spring 14 and the fixed terminal 13 has been mechanically optimized, so that the release of the elastic potential energy of the coil spring 14 is uniform and stable, and the winding speed of the curtain 3 is always kept moderate. It will not affect the operating efficiency due to slow winding, nor will it cause the curtain to be damaged by impact or the hanging ring 7 to collide due to excessive winding. The low resistance characteristics brought by the ball track column 17 further ensure the smoothness of the winding process driven by the coil spring 14.

[0126] The detachable design of the base plate 11 and the curtain box cover 10, combined with the modular internal component layout, makes the device highly convenient to maintain. When the elasticity of the coil spring 14 diminishes, the ball bearing track column 17 wears down, or the curtain 3 is damaged, the entire device does not need to be replaced; only the cover needs to be removed to replace the faulty component. This, combined with the extended service life of each component due to structural optimization, significantly reduces the later maintenance costs.

[0127] Furthermore, the overall structure adopts the principle of mechanical linkage to realize the operation of functions without relying on electric drive. This avoids the impact of electrical faults on the reliability of the device, simplifies the installation process, and can adapt to various complex industrial electrical environments. It can still operate normally, especially in special scenarios such as power outage maintenance. The stable and efficient performance brought about by all the above structural optimizations also makes its applicability in different environments more prominent.

[0128] Please see Figures 5-7 The present invention provides a terminal block anti-misoperation curtain device, wherein the electronic locking box 4 includes an electronic combination lock 18, a card holder cover 19 and a card holder bottom 22;

[0129] The electronic combination lock 18 is installed on the upper surface of the card holder cover 19;

[0130] The card holder cover 19 is hinged to the card holder bottom 22;

[0131] The card holder cover 19 has an inverted U-shaped structure;

[0132] The bottom of the card holder 22 has a bottom through groove 43;

[0133] A flexible snap-fit ​​mechanism for holding the terminal block 9 is provided in the bottom through groove 43;

[0134] The flexible snap-fit ​​mechanism includes a first snap-fit ​​20 and a second snap-fit ​​21;

[0135] The elastic locking mechanism has a third state in which the first latch 20 and the second latch 21 are far apart from each other, and a fourth state in which the first latch 20 and the second latch 21 are close together.

[0136] It should be noted that the electronic locking box 4, as an important safety component of the terminal block anti-misoperation curtain device, has its various parts designed to improve operational safety and convenience. The electronic combination lock 18 is installed on the upper surface of the card holder cover 19. Its core function is to fix the shielding curtain 3 on the terminal block 13. When the shielding curtain 3 is in the first state (shielding the terminal block 9), the electronic combination lock 18 can lock with the bottom 22 of the card holder. Only after entering the correct password can the electronic locking box 4 be unlocked, thereby releasing the fixation of the shielding curtain 3 and preventing the shielding curtain 3 from being accidentally pulled open. This ensures that the terminal block 9 is effectively shielded and that the shielding curtain 3 is securely fastened to the terminal block 9.

[0137] The card holder cover 19 adopts an inverted U-shaped structure. One side of the card holder cover 19 is hinged to the card holder bottom 22, allowing it to be flexibly flipped open and closed. When the card holder cover 19 is closed, the two side walls of the inverted U-shaped structure can form an enclosing space with the card holder bottom 22, enclosing the elastic snap-fit ​​mechanism and providing protection. When opened, the internal structure is fully exposed, facilitating the operation of the terminal block 9 or adjustment of the elastic snap-fit ​​mechanism.

[0138] U-shaped grooves are also provided on the left and right sides of the card holder bottom 22. When the electronic locking box 4 is locked, the first upright plate 25 and the second upright plate 29 on the left and right sides of the elastic locking mechanism abut against the side walls of the card holder cover 19, so that the electronic locking box 4 is further closed. At the same time, the elastic locking mechanism can also better clamp the fixed terminal 13 rows.

[0139] The bottom through groove 43 of the clip box bottom 22 provides installation space for the elastic snap-fit ​​mechanism. The first snap-fit ​​20 and the second snap-fit ​​21 of the elastic snap-fit ​​mechanism are symmetrically distributed in the bottom through groove 43, and their state switching is driven by external force: when the first snap-fit ​​20 and the second snap-fit ​​21 are pulled outward, they are in a third state where they are far apart; after the external force is released, the first snap-fit ​​20 and the second snap-fit ​​21 switch to a fourth state where they are close together by means of their own elasticity to reset.

[0140] This flexible snap-fit ​​design not only adapts to different specifications of terminal blocks 9, enhancing the versatility of the device, but also makes operation simple and intuitive. Operators can complete the installation and disassembly of the electronic locking box 4 without the need for tools, improving work efficiency while ensuring connection reliability.

[0141] Specific working principle:

[0142] When it is necessary to fix the shielding curtain 3 in the first state (shielding terminal block 9), firstly, operate the elastic snap-fit ​​mechanism to enter the fourth state, pressing the first snap 20 and the second snap 21 inward. At this time, the first snap 20 and the second snap 21 approach each other, and the U-shaped snap-fit ​​space 32 at the bottom of the card holder box 22 opens. In this state, the terminal block 9 and the electronic locking box 4 are not fixed. The terminal block 9 can be aligned with the U-shaped snap-fit ​​space 32 at the bottom of the card holder box 22 and inserted. Then, pull the first snap 20 and the second snap 21 outward to switch to the third state, that is, after the first snap 20 and the second snap 21 move away from each other, the U-shaped snap-fit ​​space 32 closes due to its own elasticity, tightly clamping the terminal block 9. At this time, the terminal block 9 and the electronic locking box 4 are fixed. At the same time, the first upright plate 25 and the second upright plate 29 in the U-shaped grooves on the left and right sides of the card holder box bottom 22 abut against the side walls of the card holder box cover 19, providing stable support for the closing of the box cover.

[0143] Next, flip the card holder cover 19 to close it. The inverted U-shaped structure and the card holder bottom 22 form an enclosing space to surround the elastic locking mechanism. At this time, the electronic combination lock 18 on the upper surface of the card holder cover 19 locks to the card holder bottom 22, and the shielding curtain 3 is pressed and fixed to the terminal block 9. If the correct password is not entered, the electronic combination lock 18 remains locked, the card holder cover 19 cannot be opened, and the shielding curtain 3 cannot be pulled, effectively preventing accidental operation.

[0144] When it is necessary to release the lock, enter the correct password to unlock the electronic combination lock 18, and the card holder cover 19 can be flipped open. Applying force inward causes the first latch 20 and the second latch 21 to switch to the fourth state (close to each other), and the U-shaped locking space 32 at the bottom of the card holder bottom 22 opens. At this time, the fixed relationship between the terminal block 9 and the electronic locking box 4 is released, and the electronic locking box 4 can be removed from the terminal block 9. The curtain 3 is then freed from its restraint and can be switched to the rewind state or other operations can be performed.

[0145] Throughout the process, the third state of the elastic snap-fit ​​mechanism is the key to fixing the terminal block 9 and the electronic locking box 4, while the fourth state is the state where the two are separated. Combined with the locking function of the electronic combination lock 18, it not only ensures the security of fixing the curtain 3, but also improves the ease of use through tool-free operation.

[0146] Please see Figures 5-14The present invention provides a terminal block anti-misoperation curtain device, wherein the elastic snap-fit ​​mechanism further includes a connecting shaft 23 and a spring 24;

[0147] The first buckle 20 includes a first upright plate 25 and a first horizontal elongated base 26;

[0148] The first vertical plate 25 is located on the left side of the first horizontal strip base 26;

[0149] The first horizontal long strip base 26 has a through rectangular hollow groove 27 along its length;

[0150] The right side of the first horizontal strip base 26 has a first bend 28, and the first bend 28 bends downward toward the direction of the first vertical plate 25 on the left.

[0151] The second buckle 21 includes a second upright plate 29 and a second horizontal strip base 30;

[0152] The second vertical plate 29 is located on the right side of the second horizontal strip base 30;

[0153] The inner dimensions of the second horizontal elongated base 30 are adapted to the through rectangular hollow groove 27;

[0154] The second horizontal elongated base 30 is embedded in the through rectangular hollow groove 27, and the second horizontal elongated base 30 can slide along the inner cavity of the through rectangular hollow groove 27.

[0155] The second horizontal strip base 30 has a second bend 31 on the left side, and the second bend 31 bends downward toward the direction of the second vertical plate 29 on the right.

[0156] The left end of the connecting shaft 23 passes through the preset shaft hole on the first bend 28 and connects to the left side of the bottom 22 of the clip box;

[0157] The right end of the connecting shaft 23 passes through the pre-set shaft hole on the second bend 31 and connects to the right side of the bottom 22 of the clip box;

[0158] Spring 24 is sleeved on the outer surface of connecting shaft 23, and spring 24 is placed in through rectangular hollow groove 27;

[0159] Spring 24 is used to form an elastic contact engagement with the first latch 20 and the second latch 21;

[0160] When the elastic snap-fit ​​mechanism is in the third state, the first upright plate 25 and the second upright plate 29 respectively abut against the two sides of the clip box cover 19, and the first bent part 28 and the second bent part are in a closed state, forming a U-shaped snap-fit ​​space 32 for snapping the terminal block 9; when the elastic snap-fit ​​mechanism is in the fourth state, the first bent part 28 and the second bent part are in a separated state.

[0161] It should be noted that the first horizontal elongated base 26 of the first latch 20 and the second horizontal elongated base 30 of the second latch 21 are nested together through a through rectangular hollow groove 27. The second horizontal elongated base 30 can slide smoothly along the inner cavity of the hollow groove. This structure provides precise guidance for the relative movement of the first latch 20 and the second latch 21, ensuring that there is no offset or jamming when the two switch states. The bending directions of the first bending part 28 and the second bending part 31 are opposite. When the two are in the closed state, they can fit tightly to form a complete U-shaped snap-fit ​​space 32, which perfectly matches the shape of the terminal block 9 and realizes the surrounding clamping of the terminal block 9. When the two are separated, the U-shaped snap-fit ​​space 32 opens, which facilitates the insertion or removal of the terminal block 9.

[0162] The connecting shaft 23 not only serves as the mounting carrier for the spring 24, but also connects the first snap-fit ​​20, the second snap-fit ​​21, and the bottom of the clip box 22 into a whole, ensuring the structural stability of the elastic snap-fit ​​mechanism during operation. The spring 24, which is sleeved on the outer surface of the connecting shaft 23, is located in the through rectangular hollow groove 27, and its two ends form elastic contact with the first horizontal elongated base 26 and the second horizontal elongated base 30, respectively. When the elastic locking mechanism is in the third state (the first latch 20 and the second latch 21 are far apart), the spring 24 is in a naturally relaxed state. It pushes the first latch 20 and the second latch 21 outward through its own elastic force, so that the first bent part 28 and the second bent part 31 are tightly closed, and the U-shaped locking space 32 firmly locks the terminal block 9, thereby fixing the shielding curtain 3 to the surface of the terminal block 9. When the first latch 20 and the second latch 21 are pressed inward to switch to the fourth state (closer to each other), the spring 24 is compressed and stores elastic potential energy. The first bent part 28 and the second bent part 31 separate, the U-shaped locking space 32 opens, and the clamping of the terminal block 9 is released.

[0163] Furthermore, the first vertical plate 25 and the second vertical plate 29 not only act as abutments against the side walls of the card holder cover 19 when the electronic locking box 4 is locked, enhancing the overall structural closure tightness, but their vertical connection design with the horizontal elongated base also improves the overall rigidity of the latch, preventing deformation due to excessive force when clamping the terminal block 9, thus ensuring structural stability after long-term use. This integrated structural design allows the elastic latching mechanism to perform multiple functions, including guiding, elastic reset, and structural reinforcement, while fulfilling the clamping function, further enhancing the overall performance of the electronic locking box 4.

[0164] Specific working principle:

[0165] When the elastic snap-fit ​​mechanism needs to be switched to the fourth state to insert the terminal block 9, the operator simultaneously presses the first vertical plate 25 and the second vertical plate 29 inwards. Since the first vertical plate 25 is connected to the first horizontal elongated base 26 and the second vertical plate 29 is connected to the second horizontal elongated base 30, the pressing force is transmitted to the first horizontal elongated base 26 and the second horizontal elongated base 30. At this time, the second horizontal elongated base 30 slides inwards along the through rectangular slot 27 of the first horizontal elongated base 26, causing the first bent part 28 and the second bent part 31 to separate from each other. At the same time, the spring 24, which is sleeved on the outer surface of the connecting shaft 23 and located in the through rectangular slot 27, is pressed by the first horizontal elongated base 26 and the second horizontal elongated base 30, is in a compressed state and stores elastic potential energy, and the U-shaped snap-fit ​​space 32 formed by the first bent part 28 and the second bent part 31 opens, making it easier to insert the terminal block 9.

[0166] After the terminal block 9 is inserted, the pressure on the first upright plate 25 and the second upright plate 29 is released. The spring 24 releases its stored elastic potential energy, generating an outward pushing force on the first horizontal elongated base 26 and the second horizontal elongated base 30. Under the elastic force of the spring 24, the second horizontal elongated base 30 slides outward along the through rectangular hollow groove 27, and the first buckle 20 and the second buckle 21 move away from each other, switching the elastic snap-fit ​​mechanism to the third state. At this time, the first bent part 28 and the second bent part 31 approach each other and close, forming a complete U-shaped snap-fit ​​space 32, firmly snapping the terminal block 9. At the same time, the first upright plate 25 and the second upright plate 29 respectively abut against the two sides of the clip box cover 19, further enhancing the stability of the overall structure and making the elastic snap-fit ​​mechanism clamp the terminal block 9 more firmly, thereby stably fixing the shielding curtain 3 to the surface of the terminal block 9.

[0167] When it is necessary to release the clamping of the terminal block 9, the first vertical plate 25 and the second vertical plate 29 are pressed inward again, and the switching process of the fourth state is repeated. The spring 24 is compressed, the first bending part 28 and the second bending part 31 are separated, the U-shaped snap-fit ​​space 32 is opened, and the terminal block 9 can be taken out. The elastic snap-fit ​​mechanism completes a complete clamping and releasing cycle.

[0168] It is worth mentioning that the nested sliding structure formed by the through rectangular hollow groove 27 of the first buckle 20 and the second horizontal strip base 30 of the second buckle 21 not only breaks through the limitations of traditional buckle fixed connection and realizes precise guidance of the relative movement of the two, but also the smooth treatment of the inner wall of the through rectangular hollow groove 27 reduces the friction during state switching by more than 40%, which not only ensures the smoothness of operation, but also avoids structural wear caused by long-term sliding, thus improving the service life compared with conventional split buckle structure.

[0169] The reverse bending design of the first bending part 28 and the second bending part 31 increases the contact area between the U-shaped snap-fit ​​space 32 formed when closed and the cross-sectional contour of the terminal block 9 compared with the traditional planar clamping structure. Combined with the uniform elastic force of the spring 24, a distributed clamping force can be formed on the surface of the terminal block 9. This not only avoids deformation of the terminal block 9 caused by excessive local stress, but also prevents device displacement caused by loose clamping, thus solving the industry pain point of poor compatibility of terminal blocks 9 of different specifications.

[0170] The integrated layout of the connecting shaft 23 and the spring 24 is ingenious. The spring 24 is built into the through rectangular hollow groove 27 and sleeved on the outer surface of the connecting shaft 23. This not only saves installation space and reduces the overall thickness of the elastic snap-fit ​​mechanism to 1 / 2 of the traditional structure, but also avoids the lateral displacement of the spring 24 during compression / expansion by the radial constraint of the connecting shaft 23, thus improving the stability of the elastic force output. Compared with the external spring 24 structure, it significantly reduces the failure rate.

[0171] The vertical arrangement of the first upright plate 25 and the second upright plate 29 achieves the dual functions of "clamping reinforcement + lid positioning": as a rigid support for the buckle, its bending strength is increased by 50% compared with ordinary flat structure, ensuring that it will not deform under force when clamped; at the same time, the abutment design with the side wall of the clamp lid 19 ensures that the overall gap after the electronic locking box 4 is closed is controlled within 0.5mm, which significantly improves the sealing performance compared with the structure without upright plates, effectively preventing dust and moisture from corroding the internal mechanism.

[0172] The present invention provides a terminal block anti-accidental curtain device, wherein the electronic combination lock 18 includes a lock body module, a control module, an input module, a drive module and a power supply module;

[0173] The input module is used to receive input signals, verify them, and generate verification results.

[0174] The control module generates an unlock command when the verification result is successful and a lock command when the verification result is unsuccessful.

[0175] The drive module is used to drive the lock body module to perform locking or unlocking operations with the lock tongue slot 42 installed on the bottom 22 of the card holder box according to the unlocking command or locking command.

[0176] The power module is used to provide operating power for the electronic combination lock 18.

[0177] In this embodiment of the invention, the modules work together to construct a complete protection chain of "input-verification-control-execution-power supply". The input module integrates 41 touch keyboard keys S1-S9 and implicit OK confirmation logic, receives input signals and verifies them, generates verification results, and the key trigger pulses are integrated by diodes D3-D8 to transmit the "password sequence" to the control module. The control module uses the CD4017 integrated chip as its core, converts the input pulses into counting logic, compares the input with the pre-stored password, generates an unlock command if the verification is successful, and generates a lock command if the verification fails. When a match is found, a specific output terminal outputs a "verification successful" level; if a mismatch occurs, the RST terminal is cleared. The drive module acts as the power execution terminal. After receiving the command, transistors Q1 / Q2... A motor forward and reverse rotation circuit is constructed using a resistor network. Verification shows that Q1 activates the motor, causing it to rotate forward and push the latch 34 to lock. When unlocking is required, another output triggers Q2, causing the motor to rotate backward and retract the latch 34. The freewheeling diode D9 and indicator light D10 respond synchronously. The latch 34 of the lock body module engages with the latch slot 42, clamping the shielding curtain 3 between the electronic locking box 4 and the terminal block 9. The latch 34, controlled by the motor, extends and engages the latch slot to lock, and retracts to unlock, achieving dual protection of "physical + electronic". The power module is powered by a button battery 40, which, after filtering and voltage regulation, provides a stable 3V power to each module. The battery can be quickly replaced when low. Initially, the latch 34 extends and locks. If the entered password matches, the control module sends an unlock command, driving the module to reverse the motor to unlock.

[0178] Please see Figure 15 and Figure 16 The present invention provides a terminal block anti-misoperation curtain device, wherein the lock body module includes a solid lock body 33 and a lock tongue 34;

[0179] A bolt 34 is provided on the solid lock body 33;

[0180] When the drive module receives the locking command, the drive bolt 34 engages with the bolt locking slot 42;

[0181] When the drive module receives the unlock command, the drive latch 34 separates from the latch slot 42.

[0182] It should be noted that the solid lock body 33 is the basic load-bearing structure of the lock body module. The movable thickened lock tongue 34 is connected to the solid lock body 33 through the built-in drive module (i.e., the lock action motor). The lock action motor is installed in the reserved chamber inside the solid lock body 33 to provide power for the movement of the lock tongue 34.

[0183] The latching groove 42 is an adaptation structure located at a specific position on the bottom 22 of the card holder box. It is set through or semi-through along the thickness direction of the bottom 22 of the card holder box, and the whole is a U-shaped / stepped groove that matches the shape of the latching tongue 34. The inlet width of the groove is slightly larger than the maximum size of the head of the latching tongue 34, which facilitates the precise insertion of the latching tongue 34. The middle part of the groove is a constraint cavity, the width of which matches the cross-section of the latching tongue 34 in the extended state, and the mechanical limit restricts the axial displacement of the latching tongue 34. The bottom of the groove is provided with an anti-disengagement baffle. When the latching tongue 34 is fully embedded in the latching groove 42, the baffle engages with the protrusion / step structure at the end of the latching tongue 34 to prevent the latching tongue 34 from being accidentally disengaged by vibration or external force.

[0184] Furthermore, the groove wall of the latch 34 is chamfered / rounded to reduce the frictional resistance when the latch 34 is inserted, and together with the thrust of the drive module motor, smooth locking is achieved. The groove depth matches the extension length of the latch 34, ensuring that after the latch 34 is fully engaged, the shielding curtain 3 between the clip box and the terminal block 9 is rigidly clamped and cannot be manually pulled or displaced. When the drive module receives a locking command, the motor rotates forward to push the latch 34 into the groove guide, and the anti-disengagement baffle locks the latch 34 tightly. When an unlocking command is received, the motor rotates in reverse to drive the latch 34 to retract, disengage from the baffle and the constraint cavity, and complete the unlocking.

[0185] The battery compartment 39 of the button battery 40 is independently located on one side of the solid lock body 33, preferably at the top. It is connected to the lock action motor, touch keypad 41 and other electrical components via wires to power the electronic combination lock 18. The touch keypad 41 is mounted on the surface of the solid lock body 33 and is used to input unlocking commands.

[0186] The fixing assembly includes a hexagonal nut 38, a fixing screw 35, an anti-slip washer 36, and a washer 37. The fixing assembly is used for assembling the lock body with the external structure. The solid lock body 33 is placed on the upper end face of the card holder cover 19. The pre-set mounting hole of the solid lock body 33 faces the bottom 22 of the card holder. The fixing screw 35 passes through the anti-slip washer 36, the washer 37, the latch 34, and the hexagonal nut 38 in sequence, and then assembles with the pre-set mounting hole of the solid lock body 33. It is worth mentioning that the latch 34 is located on the lower end face of the card holder cover 19.

[0187] Furthermore, the control module includes an integrated chip CD4017, which is a 5-bit Johnson counter with 10 decoder outputs Q0-Q9, a clock input CLK, a clear input RST, and an input pulse strobe input ENA. The clock input CLK receives the key input signal as a clock pulse, the RST input clears the counter with a high-level signal, and the input pulse strobe input ENA controls the counting validity; a low level enables counting, and a high level disables counting.

[0188] Furthermore, the input module includes a touch keyboard with 41 buttons S1-S9 and a function key OK. Buttons S1-S9 are connected to the CLK terminal of CD4017 and the corresponding control pin, respectively. The OK key is set as a password input confirmation terminal. The input password signal is integrated by diodes D3-D8 and then transmitted to U1 (CD4017 chip) for logic processing and verification.

[0189] Furthermore, the drive module includes a lock action motor M1 and a drive circuit. The drive circuit is equipped with transistors Q1 and Q2, freewheeling diodes D9 and D10, etc. When the CD4017 chip verifies the password correctly, its output pin outputs a valid level output signal, which triggers Q1 or Q2 to conduct through a resistor network (such as R4), driving the motor M1 to run. The lock action motor M1 is controlled by relay K1 to rotate, thereby driving the locking tongue 34 to move and engage with the slot of the box to form a lock, thus locking the card holder box and fixing the shielding curtain 3 to the surface of the terminal block 9. Electrolytic capacitor C1 (1μF) is used for power supply filtering, diode D9 protects the circuit, green LED D10 indicates the lock status, and resistors R1-R10 respectively serve as current limiting and voltage dividing to ensure the normal operation of each component.

[0190] It should be noted that the power interface P1 is connected to a 3V DC power supply. After current limiting by resistor R1 (2K), it powers the red indicator D1 (the light indicates that the power is on). At the same time, the 3V power supply directly provides the working voltage for the entire control module, input module, and drive module, thus building the basic power supply network for the circuit.

[0191] Input module:

[0192] Buttons S1-S9: Each button has one end connected to a 3V power supply, and the other end connected to the clock input CLK and corresponding control pins of the CD4017 (U1) via a diode array (D3-D8) (e.g., some button signals are integrated by diodes to trigger the counting logic). When a button is pressed, a pulse signal is input to the CLK terminal as the basic trigger for password input.

[0193] OK confirmation key: In the actual circuit, its signal is integrated by a diode and then participates in the logic verification process of CD4017. It can be understood that the key signal is finally summarized into the counting / verification logic of CD4017 to confirm whether the password is correct.

[0194] Control module:

[0195] Pin 16 (VCC) of CD4017 (U1) is connected to the positive terminal of the 3V power supply, and pin 8 (GND) is grounded to ensure the power supply to the chip.

[0196] Clear pin RST (pin 15): Low level by default. When a high level signal is input, the internal counter is cleared and the password input state is reset.

[0197] Input pulse selector ENA (pin 13): When low, it enables the CLK terminal to receive pulse counting; when high, it disables counting (can be used in scenarios such as "locking input", for example, temporarily disabling operation after entering the wrong password).

[0198] Decoding outputs Q0-Q9 (pins 1-7, 9-11): These outputs sequentially select and output high-level signals based on the number of pulses input to the CLK pin. These outputs are connected to subsequent driver circuits via a resistor network (such as R4) to serve as the control signal source after successful password verification.

[0199] Driver module:

[0200] Transistors Q1 (9013) and Q2 (9013) act as electronic switches, with their bases connected to the output of CD4017 via resistors (such as R7 and R4). When CD4017 outputs a high level, the current is limited by the resistors, triggering the transistors to conduct and control the motor power supply circuit.

[0201] Locking motor M1: The direction of rotation is assisted by relay K1 (K1 in the circuit diagram is a relay, which works with the forward and reverse logic of the motor). One end of the motor is connected to a 3V power supply through diode D10 (green indicator light, also serving as freewheeling protection), resistor R10 (200Ω), and other components; the other end controls the direction of current through the conduction state of transistors Q1 / Q2, thus achieving forward and reverse rotation (forward rotation pushes out the locking tongue 34 to lock, and reverse rotation retracts the locking tongue 34 to unlock).

[0202] Diode D9 (1N4148): As a freewheeling diode, it provides a discharge circuit for the reverse electromotive force of the motor coil when the transistor is turned off, thus protecting the transistor.

[0203] Electrolytic capacitor C1 (1μF): Connected in parallel to the power supply terminal to filter out power supply ripple and stabilize the operating voltage of components such as CD4017 and transistors;

[0204] Resistors R1-R10: R1 is used for current limiting to protect the power indicator D1; R2 (200), R4 (10K, etc.) are used for voltage division and current limiting to ensure that diodes, transistors, and chip pins operate within a safe voltage / current range.

[0205] It should be noted that the power module includes a button battery 40, which provides 3V DC power to the CD4017 and peripheral circuits through VCC and GND terminals. Through the above connections, the components realize functions such as password input, logic processing, motor drive, and status indication, ensuring precise control of the shielding curtain 3 on the terminal block 9 of the electronic combination lock 18.

[0206] The CD4017 chip's clear terminal RST is connected to a high-level trigger circuit. In response to the trigger operation of a preset key combination, the control module pulls the clear terminal RST to a high level to clear the counter, causing the decoder output terminal Q0 to output a high level to reset the password input state.

[0207] The password input process for the input module is as follows: Enter the factory default user password "1234" or the management password "4321", click the OK button, the buzzer will sound continuously and the indicator light will stay on. Within 3 seconds, the drive motor will unlock, and the lock tongue will automatically lock after turning 34.

[0208] The password modification function is implemented as follows: In response to the operation of entering a user password or administrator password through the input module and clicking the OK button, the control module triggers a long beep and the indicator light stays on; when the long press operation of the OK button is detected to exceed the preset duration, the control module controls the indicator light to switch to flashing state and enters the password modification mode; In response to the operation of entering a new password through the input module and clicking the OK button again, the control module triggers a long beep to confirm that the password modification is completed, with the preset duration set to 2 seconds.

[0209] The freewheeling diode 1N4148 in the drive circuit is connected in parallel across the motor to absorb the back electromotive force when the motor starts and stops, protecting the CD4017 chip from voltage surges.

[0210] To facilitate understanding, a specific application example is provided below:

[0211] 1. Password input and counter trigger (taking correct password input as an example)

[0212] Assuming the preset password is S1, S3, S5, press the keys in sequence:

[0213] Press S1: S1 connects to 3V, inputting the first pulse to the CLK terminal of CD4017 through the diode, the internal counter of CD4017 increments by 1, and the Q0 terminal outputs a high level (initial counting state).

[0214] Press S3: Input the second pulse to the CLK terminal, increment the counter by 1, and output a high level at the Q1 terminal;

[0215] Press S5: Input the third pulse to the CLK terminal, increment the counter by 1, and output a high level at the Q2 terminal;

[0216] Press the OK button: trigger the password verification logic (the circuit integrates signals through diodes to determine whether the input pulse sequence matches the preset password).

[0217] 2. CD4017 Password Verification Logic

[0218] The CD4017, a 5-bit Johnson counter, sequentially selects Q0-Q9 based on the number of pulses input to the CLK pin. If the input pulse sequence (i.e., the key press order) matches the preset password, the CD4017 outputs a valid high-level signal through a specific output pin (such as Q5), initiating the "password correct" process. If the sequence does not match, the RST pin may be triggered high (or the count may remain disordered), resetting the counter and returning to the initial state, resulting in password verification failure.

[0219] 3. Driver module action (when password is correct)

[0220] Motor forward rotation (locked): If the password is correct, the output terminal of CD4017 (such as Q5) outputs a high level. After current limiting by resistor R4, it triggers transistor Q1 to conduct. At this time, the power supply circuit of motor M1 is connected (current path: 3V-D10 (green light on, indicating lock)-M1-Q1-ground), the motor rotates forward, driving the latch 34 to extend and engage with the latch slot 42, thereby locking the clip box and fixing the shielding curtain 3 to the surface of terminal block 9;

[0221] Motor Reverse (Unlock): If the correct password is entered again (or the unlock command is triggered), CD4017 outputs another high level (such as Q6), triggering transistor Q2 to conduct. At the same time, relay K1 switches the motor power supply direction (current path reverses), the motor reverses, the latch 34 retracts, and the latch 34 is driven to separate from the latch slot 42, thus unlocking.

[0222] 4. Auxiliary functions and protection logic

[0223] Power supply filtering: Electrolytic capacitor C1 filters fluctuations in the power supply, ensuring stable operation of components such as CD4017 and transistors, and preventing false triggering caused by voltage spikes;

[0224] Freewheeling protection: Diode D9 provides a discharge circuit for the reverse electromotive force of the motor coil at the moment the transistor is turned off, preventing high voltage from breaking down the transistor;

[0225] Status indicators: D1 (red light) illuminates when the power is on, and D10 (green light) illuminates when the motor is in forward / locked state, providing intuitive feedback on the circuit's operating status;

[0226] Current limiting and voltage dividing: R1-R10 are designed with precise resistance values ​​to limit the operating current / voltage of each component and avoid overcurrent damage. R1 protects D1 from being burned out by large current, and R10 limits the motor operating current.

[0227] Please see Figure 4 The present invention provides a terminal block anti-misoperation curtain device, wherein the snap-fit ​​mechanism includes a hanging ring clamp 1 and a T-shaped fixing block 5;

[0228] T-shaped fixing block 5 is set on terminal block guide rail 8;

[0229] The clamping arm of the hanging ring clamp 1 is provided with a limiting groove 6 that is adapted to the hanging ring 7;

[0230] The hanging ring 7 is embedded in the limiting groove 6, and the clamping arm of the hanging ring clamp 1 is clamped and connected to the top of the T-shaped fixing block 5.

[0231] It should be noted that the snap-fit ​​mechanism, through the ingenious cooperation between the hanging ring clamp 1 and the T-shaped fixing block 5, constructs a quick assembly and stable connection system for the shielding curtain 3 on the terminal block guide rail 8. The T-shaped fixing block 5 is adapted to the slot structure of the terminal block guide rail 8, and can slide and be positioned flexibly along the terminal block guide rail 8. Its top plane provides a clamping support surface for the hanging ring clamp 1. The clamping arm of the hanging ring clamp 1 is formed by bending and grooving processes. The limiting groove 6 is precisely designed according to the outer diameter and thickness of the hanging ring 7. After the hanging ring 7 is embedded in the limiting groove 6, it can limit its own radial movement. At the same time, the clamping arm is tightly fitted to the top of the T-shaped fixing block 5 by elastic clamping or bolt-assisted fastening, and the mechanical clamping force fixes the hanging ring 7 and the associated shielding curtain 3 assembly in the preset position on the guide rail.

[0232] During assembly, first insert the T-shaped fixing block 5 into the terminal block guide rail 8 and adjust it to the installation point. Then, insert the hanging ring 7 into the preset hanging point of the shielding curtain 3 and embed it into the limiting groove 6 on the hanging ring clamp 1. Finally, the shielding curtain 3 is quickly mounted by clamping the clamping arm and the T-shaped fixing block 5. During disassembly and maintenance, the hanging ring 7 and the shielding curtain 3 can be removed by releasing the clamping arm. This structure not only ensures the stability of the installation of the shielding curtain 3, but also simplifies the assembly and disassembly process, and is suitable for the needs of rapid deployment and maintenance in the daily operation and maintenance of the terminal block 9 equipment.

[0233] The present invention provides a terminal block anti-misoperation curtain device, wherein the material of the curtain 3 is an insulating material.

[0234] It should be noted that the shielding curtain 3 is made of insulating material, specifically a rollable insulating material. Rollable insulating materials include, but are not limited to, polyvinyl chloride, silicone rubber, polyester film, and fluororubber. This rollable characteristic allows for easy storage when not in use, reducing space occupation and facilitating storage and transportation. When protection of the terminal block 9 is required, it can be easily unfolded to quickly cover the area of ​​the terminal block 9. Simultaneously, the insulating material effectively blocks potential external current, preventing accidental contact with live parts of the terminal block 9 and avoiding the risk of electric shock. It also prevents electrical faults such as short circuits caused by conductive foreign objects, providing physical isolation to ensure the safe operation of the terminal block 9, thus balancing operational convenience with electrical safety protection.

[0235] The device designed in this invention has the advantages of wide application demand, simple operation, and excellent safety performance: It has a wide application range, widely applicable to substation integrated automation upgrades, protection system maintenance, and fault handling, where multiple devices operate simultaneously and require isolated operation. The device is easy to operate; the telescopic curtain and clamp design simplify operation, improving work efficiency and practicality. The device boasts excellent safety performance; the durable and damage-resistant telescopic curtain provides all-around coverage, and the locking clamp design with a digital key effectively isolates the terminal block 9 in operation, greatly reducing operational risks. This device has extremely high potential for widespread application in the multi-device operating environment of power systems, proving both practicality and safety.

[0236] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0237] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0238] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A terminal block anti-accidental curtain device, characterized in that, Includes curtain roller boxes, blind curtains, and electronic locking boxes; The curtain roll box is mounted on the terminal block and is movably connected to the terminal block; The blind can be retracted and rolled up inside the blind roll box; The blind has a first state in which it extends out of the curtain roll box; When the shielding curtain is in the first state, the electronic locking box is fixed to the terminal block that is shielded by the shielding curtain.

2. The terminal block anti-misoperation curtain device according to claim 1, characterized in that, The terminal block is mounted on a terminal block guide rail; Both ends of the terminal block are provided with snap-fit ​​mechanisms; When the blind is in the first state, the curtain roll box is engaged with the locking mechanism at one end of the terminal block via a hanging ring; One end of the shielding curtain extends and engages with the other end of the terminal block via a hanging ring and a snap-fit ​​mechanism.

3. The terminal block anti-misoperation curtain device according to claim 2, characterized in that, Also includes: The blind curtain has a second state in which it is rolled up into the curtain roll box; When the blind is in the second state, the hanging ring at the extended end of the blind is separated from the snap-fit ​​mechanism.

4. The terminal block anti-accidental curtain device according to claim 1, characterized in that, The curtain roll box includes a curtain box cover, a bottom plate, an inner shaft, an outer shaft cylinder, and a left end plug; The base plate is provided with fixed terminals; A ball bearing track post is installed on the left side of the inner shaft, and the ball bearing track post is connected to the fixed terminal on the left side. The left end plug is fitted onto the end of the ball track column; A coil spring is installed on the right side of the inner shaft, and the coil spring is connected to the fixed terminal on the right side. The outer shaft sleeve is fitted onto the outer surface of the inner shaft; The shielding curtain is wound around the outer surface of the outer shaft cylinder; The curtain box cover is detachably connected to the base plate.

5. The terminal block anti-misoperation curtain device according to claim 1, characterized in that, The electronic locking box includes an electronic combination lock, a card holder cover, and a card holder bottom; The electronic combination lock is installed on the upper surface of the card holder cover; The card holder cover is hinged to the card holder bottom; The card holder cover has an inverted U-shaped structure; The bottom of the card holder box has a bottom through groove; The bottom through groove is provided with an elastic snap-fit ​​mechanism for clamping the terminal block; The elastic locking mechanism includes a first latch and a second latch; The elastic latching mechanism has a third state in which the first latch and the second latch are far apart from each other, and a fourth state in which the first latch and the second latch are close together.

6. The terminal block anti-misoperation curtain device according to claim 5, characterized in that, The elastic snap-fit ​​mechanism also includes a connecting shaft and a spring; The first buckle includes a first vertical plate and a first horizontal elongated base; The first vertical plate is located on the left side of the first horizontal elongated base; The first horizontal elongated base has a through rectangular hollowed-out groove along its length. The first horizontal strip base has a first bend on its right side, and the first bend bends downward toward the direction of the first vertical plate on the left. The second buckle includes a second vertical plate and a second horizontal strip base; The second vertical plate is located on the right side of the second horizontal elongated base; The second horizontal elongated base is adapted to the inner cavity size of the through rectangular hollow groove; The second horizontal elongated base is embedded in the through rectangular hollow groove, and the second horizontal elongated base can slide along the inner cavity of the through rectangular hollow groove. The second horizontal strip base has a second bend on its left side, and the second bend bends downward toward the direction of the second vertical plate on the right. The left end of the connecting shaft passes through the pre-set shaft hole on the first bend and connects to the left side of the bottom of the card holder box; The right end of the connecting shaft passes through a pre-set shaft hole on the second bend and connects to the right side of the bottom of the card holder box; The spring is sleeved on the outer surface of the connecting shaft, and the spring is placed inside the through rectangular hollow groove; The spring is used to form an elastic contact engagement with the first buckle and the second buckle; When the elastic snap-fit ​​mechanism is in the third state, the first upright plate and the second upright plate respectively abut against the two sides of the clip box cover, and the first bent part and the second bent part are in a closed state, forming a U-shaped snap-fit ​​space for snapping the terminal block. When the elastic snap-fit ​​mechanism is in the fourth state, the first bent portion and the second bent portion are in a separated state.

7. The terminal block anti-misoperation curtain device according to claim 5, characterized in that, The electronic combination lock includes a lock body module, a control module, an input module, a drive module, and a power supply module; The input module is used to receive input signals, verify them, and generate verification results; The control module is used to generate an unlock command when the verification result is passed, and to generate a lock command when the verification result is failed. The drive module is used to drive the lock body module to perform locking or unlocking operations with the lock tongue engaging slot installed on the bottom of the card holder box according to the unlocking command or the locking command. The power module is used to provide operating power for the electronic combination lock.

8. The terminal block anti-misoperation curtain device according to claim 7, characterized in that, The lock body module includes a solid lock body and a bolt; The solid lock body is provided with the lock tongue; When the drive module receives the locking command, it drives the bolt to engage with the bolt locking slot. When the drive module receives the unlock command, it drives the latch to separate from the latch slot.

9. The terminal block anti-misoperation curtain device according to claim 2, characterized in that, The snap-fit ​​mechanism includes a hanging ring clamp and a T-shaped fixing block; The T-shaped fixing block is mounted on the terminal block guide rail; The clamping arm of the hanging ring clamp is provided with a limiting groove that is adapted to the hanging ring; The hanging ring is embedded in the limiting groove, and the clamping arm of the hanging ring clamp is clamped and connected to the top of the T-shaped fixing block.

10. The terminal block anti-misoperation curtain device according to any one of claims 1-9, characterized in that, The shielding curtain is made of insulating material.

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