A blockchain-based digital pedestal failure evidence storage device
By employing a ring path to deploy node devices, primary and backup fiber optic connections, and fiber optic switches in the blockchain digital base fault storage device, combined with a hot-swappable hard drive bay and an anti-magnetic alloy shell, the problems of easy data transmission interruption and anti-magnetic interference are solved, achieving continuous data transmission and highly reliable data storage.
Patent Information
- Application Number
- CN202522288880.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-29
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-10-29
AI Technical Summary
Existing blockchain digital base fault storage devices suffer from easy data transmission interruptions, difficulty in ensuring storage continuity, and weak resistance to magnetic interference, failing to meet the core requirements of "uninterrupted and highly reliable".
Blockchain node devices are deployed using a ring path, with primary and backup optical fibers connected in parallel and optical fiber switches to build redundant transmission links. Combined with hot-swappable hard drive bays and anti-magnetic alloy shells, continuous data transmission and rapid replacement are achieved, while enhancing anti-magnetic protection.
It enables continuous transmission and rapid replacement of fault evidence data, ensuring uninterrupted data transmission, preventing magnetic field interference, and meeting high reliability and data integrity requirements.
Smart Images

Figure CN224682805U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of blockchain technology and data storage equipment technology, and in particular to a device for storing fault evidence on a blockchain-based digital base. Background Technology
[0002] In the process of fault storage on the blockchain digital foundation, the stability of the data transmission link, the maintenance efficiency of the storage device, and the ability to resist interference from the external environment directly determine the reliability and availability of the stored data.
[0003] Currently, blockchain technology, due to its decentralized and tamper-proof characteristics, is widely used in the field of fault storage for digital infrastructure. Existing blockchain digital infrastructure fault storage devices mainly consist of blockchain node devices, transmission links, and storage devices. Among them, blockchain node devices mostly adopt ordinary server architecture, and data transmission between nodes is achieved through a single network cable or a single optical fiber; storage devices are mostly fixed-installation hard drive arrays, and hard drive replacement requires disassembling the device's anti-magnetic shell and using special tools; the anti-magnetic shells of node devices are mostly made of ordinary cold-rolled steel plates, providing only basic protection.
[0004] In practical applications, existing technologies have many shortcomings. The most significant technical problem is the easy interruption of data transmission for fault evidence storage and the difficulty in ensuring storage continuity. On the one hand, the transmission links of existing devices lack redundancy design. When a single transmission fiber fails due to external force breakage, aging, or loose interface, data transmission between blockchain node devices will be immediately interrupted, causing fault evidence storage data to fail to be uploaded to the blockchain network in real time, resulting in the loss of critical evidence storage information. On the other hand, the hard drives of storage devices lack a quick-replacement structure. When hard drives experience read / write errors, it takes 10-15 minutes to disassemble the device's anti-magnetic casing and remove fixing screws to replace the hard drive. During the replacement, the storage function is suspended, directly disrupting the continuity of fault evidence storage data and failing to meet the core requirements of "uninterrupted and highly reliable" fault evidence storage for digital base devices. In addition, the anti-magnetic casing of existing node devices has weak anti-magnetic interference capabilities. When there is a magnetic field of ≥50mT in the external environment (such as the magnetic field generated by industrial motors or transformers), it is easy to cause bit flipping in the evidence storage data within the storage chip, further affecting data integrity. Utility Model Content
[0005] The purpose of this invention is to provide a device for fault storage of a blockchain-based digital foundation, in order to solve the above-mentioned technical problems.
[0006] This utility model provides a device for fault storage of a blockchain-based digital base, comprising several blockchain node devices, a ring network connection component, a storage device, and an anti-magnetic shell. The blockchain node devices are evenly spaced along a ring path. The ring network connection component includes a main optical fiber, a backup optical fiber, and an optical fiber switcher. The main optical fiber and the backup optical fiber are arranged parallel to each other and both ends are connected to adjacent blockchain node devices. The optical fiber switcher is installed at the optical fiber interface of the blockchain node device. The storage device is installed inside the blockchain node device and includes a hot-swappable hard drive bay and a hard drive body. The hot-swappable hard drive bay includes a locking component. Pressing the unlock button of the locking component can unlock the hard drive body. The anti-magnetic shell is made of an anti-magnetic alloy material, and an anti-magnetic shielding layer is attached to the inside.
[0007] This invention constructs a redundant and highly responsive transmission link through a combination of blockchain node devices evenly deployed along a circular path, parallel connections of primary and backup optical fibers, and optical fiber switches, enabling continuous transmission of fault-preserved evidence data and preventing the loss of critical information. The design of built-in storage devices and hot-swappable hard drive bays allows for rapid hard drive replacement, ensuring uninterrupted storage functionality. Furthermore, the dual anti-magnetic design of an anti-magnetic alloy outer shell and an inner anti-magnetic shielding layer creates a reliable magnetic protection barrier, resisting external magnetic fields and ensuring the integrity of the preserved evidence data. Attached Figure Description
[0008] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0009] Figure 1 This is a schematic diagram of the blockchain node device connection of this utility model; Figure 2 This is a top view of the internal structure of the blockchain node device of this utility model; Figure 3 This is a top view of the blockchain node device of this utility model; Figure 4 This is a front view of the blockchain node device of this utility model; Explanation of reference numerals in the attached figures: In the diagram: 1-Blockchain node device, 2-Main fiber optic cable, 3-Backup fiber optic cable, 4-Fiber optic switcher, 5-Hot-swappable hard drive bay, 6-Hard drive body, 7-Bay frame, 8-Slide rail, 9-Linkage rod, 10-Hinge ear, 11-Shaft, 12-Reset spring, 13-Limit block, 14-Antimagnetic shell, 15-Protective door, 16-Fixed base, 17-Lifting rod, 18-Locking knob, 19-Unlocking button, 20-Connecting rod, 21-Limit groove; Detailed Implementation The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0010] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0011] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0012] Example 1 like Figures 1-4 As shown: A device for storing fault evidence on a blockchain-based digital base includes several blockchain node devices 1, a ring network connection component, a storage device, and an anti-magnetic housing 14.
[0013] Blockchain node devices 1 are deployed at intervals along a preset ring path, with a spacing of 3-5 meters between two adjacent blockchain node devices 1. This ensures the compactness of the ring network, avoids signal attenuation caused by excessively long links, and provides sufficient operating space for later maintenance, facilitating the plugging and unplugging of fiber optic connectors and the repair of switches.
[0014] The ring network connection component includes a main optical fiber 2, a backup optical fiber 3, and an optical fiber switch 4. The three work together to form a redundant transmission link. The main optical fiber 2 and the backup optical fiber 3 are laid out in parallel and both ends are connected to the adjacent blockchain node device 1. The optical fiber switch 4 is installed at the optical fiber interface of the blockchain node device 1.
[0015] The blockchain node device 1 has a rectangular structure. The front inner side is reserved for a hot-swappable hard drive bay 5 for embedding the hard drive body 6. An arc-shaped limiting groove 21 is opened on the upper surface of the blockchain node device 1. The limiting groove 21 is set along the rotation trajectory of the short side of the linkage rod 9, serving as a sliding channel for the unlocking button 19. The blockchain node device 1 has a reserved fiber optic interface for connecting the ring network connection component inside, and is wrapped with an anti-magnetic shell 14 on the outside.
[0016] The fiber optic switcher 4 is a dual-path automatic fiber optic switcher, which is fixedly installed next to the fiber optic interface of the blockchain node device 1. Its input end is connected to the main fiber 2 and the backup fiber 3 respectively, and its output end is connected to the fiber optic interface of the blockchain node device 1, forming a transmission path of main / backup fiber optic switcher 4 - blockchain node device 1. The fiber optic switcher 4 has a built-in signal detection unit (such as an optical power sensor) that can detect the transmission status of the main fiber 2 in real time. When a fault is detected in the main fiber 2, it automatically switches from the main fiber 2 to the backup fiber 3 to achieve link redundancy and avoid transmission interruption.
[0017] The storage device is installed on the front inner side of the blockchain node device 1 for easy access and operation by maintenance personnel. It includes a hot-swappable hard drive bay 5 and a hard drive body 6. The hot-swappable hard drive bay 5 includes a bay frame 7, guide rails 8, and locking components, which work together to enable quick hard drive replacement. Pressing the unlock button on the locking components can release the lock on the hard drive body 6. The anti-magnetic outer shell 14 is made of anti-magnetic alloy material, with an anti-magnetic shielding layer attached to the inside.
[0018] The hot-swappable hard drive bay 5 has an internal frame 7, which is bolted to the bay, providing stable support for the entire hot-swappable structure. Two parallel guide rails 8 are fixed to the inner walls of both sides of the frame 7. The hard drive body 6 has guide grooves corresponding to the rails 8, allowing it to slide back and forth along the rails 8, ensuring smooth insertion and removal of the hard drive. The surface of the guide rails 8 is coated with polytetrafluoroethylene (PTFE).
[0019] The hinge lugs 10 of the hinged linkage rod 9 are symmetrically arranged on the cabin frame 7 to lock the hard disk body 6 and prevent the hard disk from shifting due to equipment vibration.
[0020] The locking assembly includes a linkage rod 9, a return spring 12, and an unlocking button; the linkage rod 9 is L-shaped and is hinged to the cabin frame 7 in the middle via a pivot 11, and can rotate around the pivot 11 to achieve locking and unlocking.
[0021] The linkage rod 9 is divided into a short side and a long side. The short side faces the hard disk body 6 and has an arc-shaped locking head at the end, which fits into the slot on the side of the hard disk body 6 to form a mechanical lock. The long side faces the outside of the compartment frame 7 and has a hinge hole in the middle. The long side is hinged to the compartment frame 7 through the hinge hole and hinge ear 10 via the pivot 11. The end of the long side away from the short side is connected to one end of the return spring 12 via a hook. The other end of the return spring 12 is fixed to the hanging point on the inner wall of the hot-swappable hard disk compartment 5 compartment frame 7.
[0022] After installation, the reset spring 12 is in a pre-compressed state, applying a continuous thrust to the long side of the linkage rod 9, pushing the long side to rotate around the rotating shaft 11, which in turn drives the short side to rotate towards the hard disk body 6, so that the short side clip is inserted into the slot.
[0023] The locking assembly also includes a limiting block 13; the limiting block is fixed to the cabin frame 7 and located on the side of the linkage rod 9 away from the hard disk body 6.
[0024] The hard drive body 6 is placed on the guide rail 8 of the hot-swappable hard drive bay 5 and can slide back and forth along the rail 8; the two side walls of the hard drive body 6 have slots corresponding to the short side of the linkage rod 9, and the depth of the slots is adapted to the length of the short side clip head to ensure that there is no looseness when it is locked.
[0025] The connecting rod 20 is vertically inserted into the arc-shaped limiting groove 21. Its upper end extends out of the upper surface of the blockchain node device 1 and connects to the unlocking button 19. The upper end is fixedly connected to the lower surface of the unlocking button 19 by screws. The lower end extends into the hot-swappable hard disk compartment 5 and connects to the short side of the linkage rod 9. A threaded hole can be opened on the corresponding short side. A threaded post is provided at the lower end of the connecting rod 20 to connect with the threaded hole.
[0026] Unlock button 19 is installed on the upper surface of blockchain node device 1. Unlock button 19 is cylindrical with a grid-like anti-slip texture on the surface. When unlock button 19 is pushed, the connecting rod 20 can slide synchronously along the arc-shaped limiting groove 21.
[0027] 1. Locked state The reset spring 12 is in a pre-compressed state, applying a continuous thrust to the free end of the long side of the linkage rod 9. The reset spring 12 drives the linkage rod 9 to rotate around the rotating shaft 11. The short side of the linkage rod 9 rotates synchronously with the long side, and the arc-shaped locking head at the end of the short side moves towards the hard disk body 6, eventually embedding into the slot on the side of the hard disk body 6. The thrust of the reset spring 12 is transmitted to the locking head through the linkage rod 9, making the locking head fit tightly against the inner wall of the slot, fixing the hard disk body 6 on the guide rail 8, so that it will not shift even if the device is vibrated. At this time, the connecting rod 20 rotates with the short side to the locking end of the arc-shaped limiting groove 21, and the unlocking button 19 stays at the locking end of the groove, maintaining stability. 2. Unlocked status Maintenance personnel use their fingers to press the anti-slip stripes of the unlock button 19 and push the unlock button 19 towards the unlock end of the arc-shaped limiting groove 21 away from the hard drive. The unlock button 19 drives the short side of the linkage rod 9 to rotate around the pivot 11 in the opposite direction via the connecting rod 20. As the short side rotates, it drives the long side to move towards the reset spring 12, compressing the reset spring 12. When the unlock button 19 slides to the unlock end of the arc-shaped limiting groove 21, the arc-shaped locking head at the short end of the linkage rod 9 completely disengages from the slot of the hard drive body 6, and the hard drive is unlocked. At this time, by holding the unlock button 19 in position, the hard drive can be pulled out.
[0028] 3. Relock Align the two edges of the new hard drive with the guide rails 8 of the hot-swappable hard drive bay 5 and push it into the bay frame 7; the side wall of the hard drive body 6 first contacts the outer side of the short side latch of the linkage rod 9; continue pushing the hard drive in, the side wall of the hard drive pushes the short side to rotate around the pivot 11 through the inclined surface, and the short side drives the long side to compress the return spring 12; when the hard drive is fully pushed in so that the hard drive interface is in place with the internal interface of the device, the slot on the side of the hard drive body 6 aligns with the short side latch; at this time, release the unlock button 19, the return spring 12 releases the pre-compression force, pushes the long side to rotate clockwise around the pivot 11, and the short side latch automatically inserts into the slot; at the same time, the short side of the linkage rod 9 drives the unlock button 19 to slide back to the locking end along the arc-shaped limit groove 21 through the connecting rod 20, completing the automatic locking without additional operation.
[0029] Fault Evidence Data Transmission Process The main optical fiber 2 and the backup optical fiber 3 of the ring network connection component are connected to the optical fiber interface of the adjacent blockchain node device 1 through SC type connectors. The existing optical fiber switch 4 is fixed next to the optical fiber interface, with the input end connected to the main and backup optical fibers and the output end connected to the interface of node device 1. The fault data of the digital base is transmitted to the blockchain node device 1 in real time. After being processed by the node device 1, the evidence storage data is generated and uploaded to the blockchain network through the main optical fiber 2. When the main optical fiber 2 fails due to faults such as breakage or loose interface, the optical power detection unit built into the optical fiber switch 4 detects the abnormal signal and automatically switches to the backup optical fiber 3. The evidence storage data is continuously transmitted through the backup optical fiber 3 without interruption. Antimagnetic protection process When a magnetic field exists in the external environment, the nickel-iron alloy antimagnetic shell 14 on the outside of the blockchain node device 1 first blocks most of the magnetic field; the small amount of magnetic field that is not blocked by the antimagnetic shell 14 is further absorbed and shielded by the inner permalloy shielding layer, and cannot penetrate into the inside of the device; the hard disk body 6, processor and other components inside the blockchain node device 1 are not affected by the magnetic field, and the stored data will not undergo bit flipping, ensuring data integrity.
[0030] The antimagnetic shell 14 serves as the external protective housing for the blockchain node device 1, used to isolate external magnetic fields and physical impacts. It is integrally molded from a nickel-iron alloy, possessing excellent magnetic shielding performance. A permalloy antimagnetic shielding layer is bonded to the inner wall of the antimagnetic shell 14 using epoxy resin adhesive. Permalloy has extremely high magnetic permeability in low magnetic field environments, further enhancing the magnetic shielding effect. The antimagnetic shell 14 and the antimagnetic shielding layer work together to shield external magnetic fields ≤100mT, ensuring that the internal components of the device are not interfered with by magnetic fields. A protective door 15, compatible with the storage device, is located at the front of the antimagnetic shell 14. The protective door 15 is hinged to the antimagnetic shell 14 and locked by a latch when closed, facilitating storage device maintenance while ensuring protective performance. The permalloy material of the antimagnetic shielding layer can be bonded to the inner side of the antimagnetic shell using epoxy resin adhesive. A sealing strip can be provided on the inner side of the protective door.
[0031] The blockchain node device 1 has adjustment brackets at the four corners of its bottom. The adjustment brackets are tightly connected to the bottom of the anti-magnetic shell 14. Their main function is to adjust the height and level to ensure that the main and backup optical fibers of the ring network connection components are laid horizontally, so as to avoid signal attenuation or interface loosening caused by optical fiber tilting, and to adapt to installation sites of different heights.
[0032] The adjustment bracket is made entirely of metal and has sufficient load-bearing capacity. Its structure includes a fixed base 16, a lifting rod 17, and a locking knob 18. The fixed base 16 is a hollow cylindrical structure with a through threaded hole on its side wall for installing the locking knob 18. The lifting rod 17 is a cylindrical metal rod with a diameter slightly smaller than the inner diameter of the fixed base. It can slide into the fixed base 16 to form a telescopic adjustment structure. The outer wall of the lifting rod 17 is machined with fine anti-slip textures to increase friction with the end of the locking knob 18 and prevent loosening after locking. The locking knob 18 has a butterfly-shaped structure with a protective anti-slip feature on the outer side for easy manual turning. The sliding wing has a rubber pad wrapped around its inner end. The threaded section of the locking knob 18 is adapted to the threaded hole on the side wall of the fixed seat 16. When tightened, the rubber pad can fit tightly against the anti-slip texture of the lifting rod, locking the position of the lifting rod 17 through friction. The anti-slip pad is a round rubber pad that is attached to the bottom of the lifting rod with strong adhesive. The surface has a grid-like anti-slip texture, which can increase the friction with the installation ground, prevent the equipment from shifting due to vibration, and at the same time play a buffering role, reducing the impact of ground vibration on the internal components of the equipment.
[0033] This utility model's blockchain node device is arranged in a ring at reasonable intervals, with primary and backup optical fibers transmitting in parallel and independently, reducing signal crosstalk and attenuation. It is suitable for long-term stable transmission needs in complex environments such as industrial plants and substations, providing continuous data source support for fault evidence storage. Through the cooperation of primary and backup optical fibers and optical fiber switchers, it automatically switches to backup optical fibers, avoiding the problem of traditional single-link transmission interruption, ensuring that fault data of the digital base is uploaded to the blockchain network in real time, with no risk of loss of critical evidence storage information. The locking assembly uses a design that resists thrust by toggling the unlock button, combined with the guide rail, to shorten hard drive replacement time. It does not require disassembling the device casing and special tools, significantly reducing maintenance time compared to traditional fixed hard drives, avoiding storage function interruption, and ensuring uninterrupted data storage for fault evidence storage. The nickel-iron alloy anti-magnetic shell and the inner permalloy shielding layer work together to shield external magnetic fields, physically blocking magnetic field interference to the hard drive storage chip and node device processor, preventing bit flipping of evidence storage data, ensuring data authenticity and validity, and meeting the core requirement of tamper-proof fault evidence storage.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A device for fault storage of a blockchain-based digital foundation, characterized in that: The system includes several blockchain node devices, a ring network connection component, storage devices, and an anti-magnetic shell. The blockchain node devices are evenly spaced along a ring path. The ring network connection component includes a main optical fiber, a backup optical fiber, and an optical fiber switcher. The main optical fiber and the backup optical fiber are arranged parallel to each other and both ends are connected to adjacent blockchain node devices. The optical fiber switcher is installed at the optical fiber interface of the blockchain node device. The storage device is installed inside the blockchain node device and includes a hot-swappable hard drive bay and a hard drive body. The hot-swappable hard drive bay includes a locking assembly. Pressing the unlock button of the locking assembly can release the lock on the hard drive body. The anti-magnetic shell is made of anti-magnetic alloy material, and an anti-magnetic shielding layer is attached to the inside.
2. The device for fault storage of a blockchain-based digital foundation according to claim 1, characterized in that, The main optical fiber and the backup optical fiber are detachably connected to the optical fiber interface of the blockchain node device via optical fiber connectors.
3. The device for fault storage of a blockchain-based digital foundation according to claim 1, characterized in that, The input end of the fiber optic switch is connected to the main fiber and the backup fiber, respectively, and the output end is connected to the fiber optic interface of the blockchain node device. The fiber optic switch has a built-in signal detection unit.
4. The device for fault storage of a blockchain-based digital foundation according to claim 1, characterized in that, The hot-swappable hard drive bay also includes a bay frame and guide rails; the bay frame is fixed to the inner wall of the blockchain node device by bolts, and the guide rails are symmetrically fixed to the inner side of the bay frame and coated with polytetrafluoroethylene.
5. The device for fault storage of a blockchain-based digital foundation according to claim 4, characterized in that, The locking assembly also includes a linkage rod and a return spring; the linkage rod is L-shaped and hinged in the middle to the housing frame of the hot-swappable hard drive bay, one end of which is inserted into the side slot of the hard drive body, and the other end is connected to the return spring; the return spring is fixed to the housing frame.
6. The device for fault storage of a blockchain-based digital foundation according to claim 5, characterized in that, The locking assembly is further provided with a limiting block; the limiting block is fixed to the cabin frame and located on the side of the linkage rod away from the hard disk body.
7. The device for fault storage of a blockchain-based digital foundation according to claim 4, characterized in that, The surface of the unlock button is provided with anti-slip texture, and the surface of the unlock button is flush with the front panel of the frame of the hot-swappable hard drive bay.
8. The device for fault storage of a blockchain-based digital foundation according to claim 1, characterized in that, The antimagnetic outer shell is integrally formed from nickel-iron alloy, and the antimagnetic shielding layer is made of permalloy. It is bonded to the inner side of the antimagnetic outer shell with epoxy resin, and the edge of the antimagnetic shielding layer extends beyond the edge of the antimagnetic outer shell to form a magnetic shielding extension.
9. The device for fault storage of a blockchain-based digital foundation according to claim 1, characterized in that, The blockchain node device has adjustment brackets at its four bottom corners; the adjustment brackets include a fixed base, a lifting rod and a locking knob. The fixed base is welded to the antimagnetic shell. One end of the lifting rod is inserted into the fixed base and the other end is provided with an anti-slip pad. The locking knob is threaded through the fixed base and its end abuts against the lifting rod.
10. The device for fault storage of a blockchain-based digital foundation according to claim 1, characterized in that, The front of the blockchain node device is equipped with a protective door adapted to the storage device; the protective door is hinged to the anti-magnetic shell by a hinge, and the inner side of the protective door is equipped with a sealing strip.