CN111666605A - Double-encryption data port applied to secret data transmission - Google Patents

Abstract

The invention provides a double-encryption data port applied to confidential data transmission, which comprises a transmission device for directly establishing data connection and connection with a memory and an insertion device for directly establishing data connection and connection with a mobile hard disk, wherein the transmission device after being conducted establishes data connection and connection with the insertion device and enables an encryption data transmission channel to be established between the memory and the mobile hard disk, the transmission device comprises an insulating mounting cylinder, an encryption mechanism I, an encryption mechanism II, an output contact and an output lead, the encryption mechanism I, the encryption mechanism II, the output contact and the output lead are arranged on the outer circular surface of the mounting cylinder, the input end of the output lead is in data connection and connection with the memory, the output end of the output lead is in connection and connection with the input contact, the encryption mechanism I and the encryption mechanism II are internally disconnected and connected in series on the output lead under the initial state, the encryption mechanism I and the encryption mechanism II are positioned between the, the significance lies in that the mechanical structure is used for physical encryption, various passwords can be formed, and the passwords are difficult to crack.

Description

Double-encryption data port applied to secret data transmission

Technical Field

The invention relates to the technical field of data encryption transmission, in particular to a double-encryption data port applied to confidential data transmission.

Background

With the continuous development and progress of informatization, digitization and networking, a computer becomes one of necessary or insufficient tools for assisting a person to process work, the computer is often subjected to storage backup and movement of large-capacity data in the using process, the online transmission speed of a network is slow, a mobile hard disk is widely popular as a convenient and high-speed data storage and transfer device, the traditional hard disk does not have a data encryption function in the using process, the illegal phenomenon that the data is stolen easily occurs, and if the stored and transferred data is important client information, business confidentiality, financial data or military confidentiality and the like, serious consequences and economic loss can be caused.

At present, software is mostly adopted to encrypt data transmission on a communication device on a computer, a tablet personal computer or a smart phone. However, for software implementations of encryption algorithms, it is easy for an attacker to gain hacked access, not only to see the memory binary values loaded onto the communication device and to replace them, but also to control the encryption algorithm implemented at will. If the key used for encryption/decryption is exposed to an attacker by attacking the memory as described above, the attacker can easily interpret any ciphertext, resulting in the encryption algorithm not actually performing any data encryption function and possibly being countered by the attacker. In order to overcome the above technical problems, it is necessary to provide a hidden-type dual-encryption data port with a mechanical structure for physical encryption, which includes a transmission device connected to a memory and a plug device connected to a mobile hard disk, wherein the transmission device encrypts and the plug device can decrypt the plug device to realize the butt connection of the two, and further encrypt a transmission channel of data to avoid data leakage.

Disclosure of Invention

In order to solve the defects of the prior art, the invention aims to provide a hidden-hole type double-encryption data port with a mechanical structure for physical encryption, which comprises a transmission device communicated with a memory and a plug-in device communicated with a mobile hard disk, wherein the transmission device is encrypted, and the plug-in device can decrypt the plug-in device to realize butt joint and communication of the transmission device and the plug-in device, so that a transmission channel of data is encrypted, and data leakage is avoided.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows.

The double-encryption data port applied to confidential data transmission comprises a transmission device and a plug-in device, wherein the transmission device is used for directly establishing data connection and connection with a memory, the plug-in device is used for directly establishing data connection and connection with a mobile hard disk, the transmission device is internally mechanically encrypted, a transmission channel is disconnected, the plug-in device is matched with the transmission device in a plug-in fit mode and can decrypt the inside of the transmission device to enable the transmission channel to be conducted, the conducted transmission device and the plug-in device establish data connection and connection, and an encryption data transmission channel is established between the memory and the mobile hard disk;

the transmission device comprises an insulating mounting cylinder, a first encryption mechanism, a second encryption mechanism, an output contact and an output lead, wherein the first encryption mechanism, the second encryption mechanism, the output contact and the output lead are arranged on the outer circular surface of the mounting cylinder;

the plug device comprises a first decryption mechanism, a second decryption mechanism, an input contact and an input lead, wherein one end of the input lead is in butt joint with the input contact, the other end of the input lead is in butt joint with the mobile hard disk, the first decryption mechanism is used for decrypting the first encryption mechanism and conducting the inside of the first encryption mechanism, and the second decryption mechanism is used for decrypting the second encryption mechanism and conducting the inside of the second encryption mechanism.

As a further optimization or improvement of the present solution.

The installation cylinder is of a circular cylinder structure, openings are formed in two ends of the installation cylinder, a circular end cover is coaxially and fixedly arranged at one end of the installation cylinder, the diameter of the end cover is larger than that of the installation cylinder, inserting holes which are coaxially arranged are formed in the end cover, the aperture of the inserting holes is equal to the inner diameter of the installation cylinder, a cylindrical thin-wall shell is coaxially sleeved outside the installation cylinder, the shell is fixedly connected with the end cover, the installation cylinder is sealed by the shell and the end cover, a first encryption mechanism and a second encryption mechanism are arranged between the outer circular surface of the installation cylinder and the inner circular surface of the shell, an output contact penetrates through the end cover and is flush with the end surface protruding from the end cover, the first encryption mechanism, the second encryption mechanism, the output contact and the output lead are provided with four groups.

As a further optimization or improvement of the present solution.

The output wire comprises a first line segment, a second line segment and a third line segment, one end of the first line segment extends to the outside of the shell and is connected and communicated with the memory, the other end of the first line segment is connected and communicated with one end of the encryption mechanism, one end of the second line segment is connected and communicated with the other end of the encryption mechanism, the other end of the second line segment is connected and communicated with one end of the encryption mechanism, one end of the third line segment is connected and communicated with the other end of the encryption mechanism, and the other end of the third line segment is connected.

As a further optimization or improvement of the present solution.

The mounting cylinder is characterized in that a partition plate which is arranged along the radial direction of the mounting cylinder in an outward extending mode is fixedly arranged on the outer circular surface of the mounting cylinder, one end of the partition plate extends to one end portion of the mounting cylinder, the other end of the partition plate extends to the other end portion of the mounting cylinder, the partition plates are four in number and are arranged in an array mode along the circumferential direction where the mounting cylinder is located, a mounting area is formed between every two adjacent partition plates, and the four groups of encryption mechanisms I and the encryption mechanisms II correspond to the mounting area one to one and the encryption mechanisms I and the encryption mechanisms.

As a further optimization or improvement of the present solution.

The outer circular surface of the mounting cylinder is also provided with a rectangular mounting plate which extends outwards along the radial direction of the mounting cylinder, the mounting plate is positioned between two adjacent partition plates, the two mounting plates are arranged in parallel and are arranged at intervals, the first encryption mechanism comprises a butt joint block fixedly arranged between the two mounting plates and an elastic butt joint sheet rotatably arranged between the two mounting plates, the butt joint block is close to one end of the mounting plate, a fixed shaft formed at the rotary joint between the butt joint sheet and the mounting plates is close to the other end of the mounting plate, the movable end of the butt joint sheet extends to a position between the butt joint block and the outer circular surface of the mounting cylinder, the butt joint sheet is contacted with the outer circular surface of the mounting cylinder around the fixed shaft under the action of the elasticity of the butt joint sheet in an initial state and is separated from the butt joint block, the other end of the first line segment is connected with the butt joint sheet, the inner sinking groove is aligned with the two mounting plates which are arranged in parallel, the inner sinking groove is arranged to be inverted trapezoid and gradually narrowed from the inner part of the mounting cylinder to the outer opening, and the small opening of the inner sinking groove is aligned with the middle position of the butt joint piece.

As a further optimization or improvement of the present solution.

The second encryption mechanism is located between the mounting plate and the end cover, the second encryption mechanism comprises an insulating cylinder body fixedly connected with the mounting cylinder, the axial direction of the cylinder body is parallel to the axial direction of the mounting cylinder, a first contact and a second butt contact penetrate through the outer circular surface of the cylinder body and are symmetrically arranged along the axial direction of the cylinder body, the first contact and the second butt contact extend to the inside of the cylinder body from the outside of the cylinder body, the other end of the second line segment is connected with the second butt contact, and one end of the third line segment is connected with the second butt contact.

As a further optimization or improvement of the present solution.

The rear end of the barrel is arranged close to the mounting plate, the front end of the barrel is arranged close to the end cover, the rear end of the barrel is opened and arranged, a sealing block for sealing and plugging the opening is arranged at the opening, the front end of the barrel is sealed and arranged, a sliding rod which is in sliding guide fit with the sliding rod is coaxially penetrated through the sealing block, one end of the sliding rod is always positioned outside the barrel, the other end of the sliding rod is always positioned inside the barrel, a first round magnet is coaxially and fixedly arranged at one end of the sliding rod, which is positioned outside the barrel, the first magnet is positioned in a floating hole formed in the end cover and can float along the axial direction of the floating hole, a front annular contact piece and a rear annular contact piece are coaxially and fixedly sleeved on the outer circumferential surface of the inside of the barrel, the front contact piece and the rear contact piece are both positioned at the middle position of the barrel in the initial state, a gap, The other end of the middle spring is abutted against the rear contact piece, a second middle spring is arranged between the front contact piece and the closed end of the barrel, one end of the second middle spring is abutted against the closed end of the barrel, the other end of the second middle spring is abutted against the front contact piece, the first middle spring is matched with the second middle spring in an initial state, and the first opposite contact head and the second opposite contact head are located between the front contact piece and the rear contact piece.

As a further optimization or improvement of the present solution.

One of the front contact piece and the rear contact piece is a conducting piece, the other is an insulating piece, if the front contact piece is the conducting piece and the rear contact piece is the insulating piece, a decryption mechanism II in the plugging device needs to apply repulsive force to a magnet I to enable the sliding rod to slide towards the inside of the cylinder body, the front contact piece slides backwards and is in contact connection with a pair contact head I and a pair contact head II, and the encryption mechanism II decrypts; if the front contact piece is an insulating piece and the rear contact piece is a conducting piece, a decryption mechanism II in the plug-in device needs to apply attraction force to the magnet I to enable the sliding rod to slide towards the outside of the barrel, the rear contact piece slides forwards and is in contact with the contact head I and the butt contact head II to be communicated, and the encryption mechanism II decrypts.

As a further optimization or improvement of the present solution.

The end face of the end cover is coaxially provided with a first quincunx groove which forms four petal-shaped grooves communicated with each other, the four groups of first magnets and output contacts correspond to the four petal-shaped grooves one by one, and the first magnets and the output contacts are arranged at the left side parts of the petal-shaped grooves.

As a further optimization or improvement of the present solution.

The decryption mechanism comprises an insulated decryption cylinder, the diameter of the decryption cylinder is equal to the inner diameter of the installation cylinder, the decryption cylinder can be inserted into the installation cylinder along the insertion space, the insertion front end of the decryption cylinder is coaxially provided with a circular telescopic block, the diameters of the telescopic block and the decryption cylinder are equal, the eccentric position of the decryption cylinder, which is close to one end face of the telescopic block, is provided with coaxially arranged fan-shaped sliding grooves, the sliding grooves are provided with four and are arranged in an array manner along the circumferential direction of the decryption cylinder, the eccentric position of the telescopic block, which is close to one end face of the decryption cylinder, is coaxially and fixedly provided with fan-shaped sliding blocks, the sliding blocks are provided with four and are arranged in an array manner along the circumferential direction of the telescopic block, the sliding blocks are matched with the sliding grooves, the sliding blocks are inserted into the sliding grooves, the sliding blocks and the sliding grooves form sliding guide fit along the axial direction of the decryption cylinder, the containing groove and the outer circular surface penetrating through the decryption cylinder are arranged, a second containing groove is formed in the eccentric position, close to one end face of the decryption cylinder, of the telescopic block and located between the two adjacent sliding blocks, the second containing groove penetrates through the outer circular surface of the decryption cylinder, when the sliding blocks are completely inserted into the sliding grooves, the first containing groove and the second containing groove can form a complete containing groove, and a first protruding block and a second protruding block which can be arched upwards are hinged inside the containing groove.

As a further optimization or improvement of the present solution.

The first projection and the second projection are of rectangular block structures, the sum of the length of the first projection and the length of the second projection is greater than that of the accommodating groove, one end of the first projection is hinged with one end of the accommodating groove, which is far away from the accommodating groove, of the second accommodating groove, the axial direction of a hinge shaft formed at the hinged joint is perpendicular to the axial direction of the decryption cylinder, one end of the second projection is hinged with one end of the accommodating groove, which is far away from the accommodating groove, of the second accommodating groove, the axial direction of the hinge shaft formed at the hinged joint is perpendicular to the axial direction of the decryption cylinder, the other end of the first projection is hinged with the other end of the second projection, the axial direction of the hinge shaft formed at the hinged joint is perpendicular to the axial direction of the decryption cylinder, the first projection and the second projection are accommodated in the first accommodating groove and the second accommodating groove in an initial state, the included angle, which, the second bump is aligned with the inner sinking groove.

As a further optimization or improvement of the present solution.

The utility model discloses a deciphering section of thick bamboo, including the telescopic block, the telescopic block is close to the middle part position coaxial fixed sleeve and the sleeve of deciphering section of thick bamboo one end face and is located between the slider, the inside coaxial rotation of deciphering section of thick bamboo is provided with the lead screw, and lead screw one end is pegged graft in the sleeve and constitutes threaded connection cooperation, the other end extends to the outside of deciphering section of thick bamboo and the coaxial fixed knob that is provided with the cap form of this end with it, has seted up anti-skidding line on the outer disc of knob, coaxial cover is equipped with handle and knob movable contact on the outer disc that the deciphering section of thick.

As a further optimization or improvement of the present solution.

The decryption mechanism two include coaxial fixed cover locate decryption section of thick bamboo on insulating cross, the cross includes along decryption section of thick bamboo radial outside extending's support arm and the tip of support arm sets to the arc surface, the cross is close to the handle and arranges, the support arm inlays on the terminal surface of decryption section of thick bamboo insertion direction and is equipped with magnet two and magnet two matches rather than one-to-one according to magnet one's coding logic, input contact also inlay locate the support arm along decryption section of thick bamboo insertion direction on one terminal surface, when decryption section of thick bamboo inserts to the installation section of thick bamboo in, the cross contacts with the tank bottom of quincunx recess one and four pairs of magnet one and magnet two align the cooperation, four pairs of output contact and input contact align the contact switch-on.

As a further optimization or improvement of the present solution.

The end cover of the transmission device is also provided with a limiting mechanism for limiting and constraining the cross, the limiting mechanism comprises a circular limiting disc coaxially and fixedly arranged at the opening of the first quincunx groove, one end surface of the limiting disc, which is far away from the end cover, is also provided with a second quincunx groove, the second quincunx groove is arranged opposite to the first quincunx groove, and the second quincunx groove and the first quincunx groove are in structures and shapes, the sizes of the two parts are completely consistent, the right side part of the first quincunx groove is provided with a through groove for the cross support arm to pass through, the limiting mechanism further comprises a fixing cap which is coaxially and fixedly connected with the end cover and is sleeved outside the first quincunx groove and the second quincunx groove, a cross hole for the decryption cylinder to pass through and opposite to the left side part of the second quincunx groove are formed in the end face of the fixing cap, and the depth of the first quincunx groove is equal to the thickness of the cross.

Compared with the prior art, the invention has the beneficial effects that:

1. the structure is ingenious, the principle is simple, and the physical encryption is carried out by a mechanical structure and is difficult to crack;

2. the decryption mechanism decrypts the first encryption mechanism by one pair, and the decryption mechanism decrypts the second encryption mechanism by two pairs, so that the encryption function is more reliable;

3. the second encryption mechanism and the second decryption mechanism are arranged through magnetic poles, so that various passwords can be formed, and the cracking difficulty is improved.

Drawings

Fig. 1 is a schematic structural diagram of a transmission device and a plug device according to the present invention.

Fig. 2 is a schematic structural diagram of the transmission device.

Fig. 3 is a schematic structural diagram of the transmission device.

Fig. 4 is a schematic diagram of the internal structure of the transmission device.

Fig. 5 is an installation diagram of the first encryption mechanism, the second encryption mechanism and the output contact.

Fig. 6 is a series diagram of the first encryption mechanism, the second encryption mechanism, and the output contact.

Fig. 7 is a schematic structural view of the mounting cylinder.

Fig. 8 is a cross-sectional view of the mounting barrel.

Fig. 9 is a schematic structural diagram of the second encryption mechanism.

Fig. 10 is a schematic diagram of the internal structure of the second encryption mechanism.

Fig. 11 is a schematic diagram of the internal structure of the second encryption mechanism.

Fig. 12 is a diagram of line three in conjunction with the output contact.

Fig. 13 is a schematic structural view of the end cap.

Fig. 14 is a schematic structural view of the plugging device.

Fig. 15 is a schematic structural view of the plugging device.

Fig. 16 is a schematic structural diagram of a first decryption mechanism.

Fig. 17 is an exploded view of the first decryption mechanism.

Fig. 18 is a partial structural diagram of the first decryption mechanism.

Fig. 19 is a partial structural diagram of a first decryption mechanism.

Fig. 20 is a schematic structural diagram of the second decryption mechanism.

Fig. 21 is a view of the stop mechanism in cooperation with the end cap.

Fig. 22 is a partial structural schematic view of the limiting mechanism.

Fig. 23 is a partial structural schematic view of the limiting mechanism.

Labeled as: 100. A transmission device; 110. mounting the cylinder; 111. an end cap; 112. a housing; 113. a partition plate; 114. mounting a plate; 115. an inner sinking groove; 116. a first quincunx groove; 117. a jack; 120. a first encryption mechanism; 121. a butt joint block; 122. butt-jointing sheets; 130. a second encryption mechanism; 131. a barrel; 132. a sealing block; 133. a slide bar; 134. a magnet I; 135. a rear contact piece; 136. a front contact; 137a, a centering spring I; 137b and a second centering spring; 138. for the contact head I; 139. butting a contact II; 140. an output contact; 150. an output lead; 151. a first line segment; 152. a second line segment; 153. a line segment III; 160. a limiting mechanism; 161. a limiting disc; 162. a second quincunx groove; 163. a through groove; 164. a fixing cap; 165. a cross hole;

200. a plug-in device; 210. a first decryption mechanism; 211. a decryption cylinder; 212. a telescopic block; 213a, a chute; 213b, a slider; 214a, a first receiving groove; 214b, a second accommodating groove; 215a, a first bump; 215b, a second bump; 216. a sleeve; 217. a screw rod; 218. a knob; 219. a handle; 220. a second decryption mechanism; 221. a cross; 222. a second magnet; 230. an input contact; 240. and (4) inputting a lead.

Detailed Description

Referring to fig. 1-23, the dual-encryption data port for secure data transmission includes a transmission device 100 for directly establishing data connection with a memory, and a plug device 200 for directly establishing data connection with a mobile hard disk, wherein the transmission device 100 is mechanically encrypted and the transmission channel is disconnected, the plug device 200 is matched with the transmission device 100 and can decrypt the inside of the transmission device 100 to enable the transmission channel to be conducted, and the conducted transmission device 100 establishes data connection with the plug device 200 and enables the encrypted data transmission channel to be established between the memory and the mobile hard disk.

Specifically, the transmission device 100 includes an insulating mounting cylinder 110, a first encryption mechanism 120, a second encryption mechanism 130, an output contact 140, and an output wire 150, which are disposed on an outer circumferential surface of the mounting cylinder 110, an input end of the output wire 150 is connected to a memory in a data connection manner, an output end of the output wire 150 is connected to the output contact 140 in a connection manner, the first encryption mechanism 120 and the second encryption mechanism 130 are disconnected from each other in an initial state and are connected to the output wire 150 in series, the first encryption mechanism 120 and the second encryption mechanism 130 are located between the input end and the output end of the output wire 150, and the first encryption mechanism 120 and the second encryption mechanism 130 can be decrypted and connected by the plug device 200.

Specifically, the plug device 200 includes a first decryption mechanism 210, a second decryption mechanism 220, an input contact 230, and an input wire 240, wherein one end of the input wire 240 is in butt joint with the input contact 230, and the other end of the input wire is in butt joint with the mobile hard disk, the first decryption mechanism 210 is used for decrypting the first encryption mechanism 120 and conducting the first encryption mechanism 120 internally, and the second decryption mechanism 220 is used for decrypting the second encryption mechanism 130 and conducting the second encryption mechanism 130 internally.

The mounting cylinder 110 is a circular cylinder structure and is provided with openings at two ends, one end of the mounting cylinder 110 is coaxially and fixedly provided with a circular end cover 111, the diameter of the end cover 111 is larger than that of the mounting cylinder 110, the end cover 111 is provided with a jack 117 which is coaxially arranged, the aperture of the jack 117 is equal to the inner diameter of the mounting cylinder 110, the outer part of the mounting cylinder 110 is coaxially sleeved with a cylindrical thin-walled shell 112, the shell 112 is fixedly connected with the end cover 111, the shell 112 and the end cover 111 seal the mounting cylinder 110 with the inner part, a first encryption mechanism 120 and a second encryption mechanism 130 are arranged between the outer circular surface of the mounting cylinder 110 and the inner circular surface of the shell 112, an output contact 140 penetrates through the end cover 111 and is flush with the end surface of the end cover 111, the first encryption mechanism 120 and, the output contacts 140 and the output wires 150 are provided in four sets and arranged in an array in the circumferential direction of the mounting cylinder 110.

More specifically, the output lead 150 includes a first line segment 151, a second line segment 152, and a third line segment 153, one end of the first line segment 151 extends to the outside of the housing 112 and is connected to the memory, the other end is connected to one end of the first encryption mechanism 120, one end of the second line segment 152 is connected to the other end of the first encryption mechanism 120, the other end is connected to one end of the second encryption mechanism 130, one end of the third line segment 153 is connected to the other end of the second encryption mechanism 130, and the other end is connected to the output contact 140, and the first line segment 151, the second line segment 152, and the third line segment 153 are conducted by conducting the first encryption mechanism 120 and the second encryption mechanism 130, so that the output lead 150 is conducted.

In the process of data encryption transmission, the plug device 200 is inserted into the mounting cylinder 110 along the insertion hole 117, the first decryption mechanism 210 in the plug device 200 is matched with the first encryption mechanism 120, the first encryption mechanism 120 is decrypted and internally conducted, the second decryption mechanism 220 in the plug device 200 is matched with the second encryption mechanism 130, the second encryption mechanism 130 is decrypted and internally conducted, after the first encryption mechanism 120 is conducted with the first encryption mechanism 130, the first line segment 151, the second line segment 152 and the third line segment 153 are communicated, namely, the output wire 150 establishes a data transmission channel between the memory and the output contact 140, the input contact 230 in the plug device 200 is in contact with the output contact 140 and makes the output wire 150 in butt joint with the output wire 240, and the encrypted data is transmitted from the memory to the mobile hard disk through the output wire 150, the output contact 140, the input contact 230 and the input wire 240, so that the encrypted data transmission is realized.

In order to facilitate the independent installation of the first four encryption mechanisms 120 and the second encryption mechanism 130, a partition plate 113 is fixedly arranged on the outer circumferential surface of the mounting cylinder 110 and extends outwards along the radial direction of the mounting cylinder, one end of the partition plate 113 extends to one end of the mounting cylinder 110, the other end of the partition plate 113 extends to the other end of the mounting cylinder 110, four partition plates 113 are arranged and are arranged in an array along the circumferential direction of the mounting cylinder 110, an installation area is formed between every two adjacent partition plates 113, the first four encryption mechanisms 120 and the second encryption mechanisms 130 correspond to the installation area one by one, and the first encryption mechanisms 120 and the second encryption mechanisms 130 are arranged in the corresponding installation areas.

Specifically, the outer circumferential surface of the mounting cylinder 110 is further provided with a rectangular mounting plate 114 extending outwards along the radial direction of the mounting cylinder, the mounting plate 114 is located between two adjacent partition plates 113, the mounting plates 114 are arranged in parallel and at intervals, the first encryption mechanism 120 comprises a docking block 121 fixedly mounted between the two mounting plates 114, and an elastic docking tab 122 rotatably mounted between the two mounting plates 114, the docking block 121 is close to one end of the mounting plate 114, a fixed shaft formed at the rotary joint between the docking tab 122 and the mounting plate 114 is close to the other end of the mounting plate 114, the movable end of the docking tab 122 extends to a position between the docking block 121 and the outer circumferential surface of the mounting cylinder 110, the docking tab 122 contacts the outer circumferential surface of the mounting cylinder 110 around the fixed shaft thereof and is separated from the docking block 121 in an initial state, the other end of the line segment 151 is connected with the docking block 121, One end of the second line segment 152 is connected to the butt-joint piece 122, in order to overcome the elastic force of the butt-joint piece 122, the butt-joint piece 122 rotates upward around the fixing shaft thereof to be in contact with the butt-joint block 121, the mounting tube 110 is provided with an inner sunken groove 115 penetrating inside and outside, the inner sunken groove 115 is aligned with the two mounting plates 114 arranged in parallel, the inner sunken groove 115 is arranged in an inverted trapezoid shape, and gradually narrows from the inside of the mounting tube 110 to the outside, the small opening of the inner sunken groove 115 is aligned with the middle position of the butt-joint piece 122, the first decryption mechanism 210 in the plug-in device 200 arches upward through the inner sunken groove 115 to push the butt-joint piece 122, so that the butt-joint block 121 and the butt-joint piece 122 are in contact and butt-joint, and decryption of the first.

Specifically, the second encryption mechanism 130 is located between the mounting plate 114 and the end cover 111, the second encryption mechanism 130 includes an insulating cylinder 131 fixedly connected to the mounting cylinder 110, an axial direction of the cylinder 131 is parallel to an axial direction of the mounting cylinder 110, a first butt contact 138 and a second butt contact 139 are arranged on an outer circumferential surface of the cylinder 131 in a penetrating manner and are symmetrically arranged along the axial direction of the cylinder 131, the first butt contact 138 and the second butt contact 139 both extend from an outer portion of the cylinder 131 to an inner portion of the cylinder 131, the other end of the line segment two 152 is connected and communicated with the first butt contact 138, one end of the line segment three 153 is connected and communicated with the second butt contact 139, and decryption of the second encryption mechanism 130 is achieved by connecting the first butt contact 138 and the second butt contact 139.

More specifically, one end of the cylinder 131 close to the mounting plate 114 is a rear end, one end of the cylinder 131 close to the end cover 111 is a front end, the rear end of the cylinder 131 is open and provided with a sealing block 132 for sealing and sealing the opening, the front end of the cylinder 131 is sealed and provided with a sliding rod 133 coaxially penetrating and forming sliding guide fit with the opening, one end of the sliding rod 133 is always positioned outside the cylinder 131, the other end of the sliding rod 133 is always positioned inside the cylinder 131, one end of the sliding rod 133 positioned outside the cylinder 131 is coaxially and fixedly provided with a circular first magnet 134, the first magnet 134 is positioned in a floating hole formed in the end cover 111, the first magnet 134 can float along the axial direction of the floating hole, an annular front contact piece 136 and an annular rear contact piece 135 are coaxially and fixedly sleeved on the outer circumferential surface of the inside of the cylinder 131, the front contact piece 136 and the rear contact piece 135 are both positioned in the middle, a centering spring 137a is arranged between the rear contact piece 135 and the sealing block 132, one end of the centering spring 137a is abutted against the sealing block 132, the other end is abutted against the rear contact piece 135, a centering spring two 137b is arranged between the front contact piece 136 and the closed end of the barrel body 131, one end of the centering spring two 137b is abutted against the closed end of the barrel body 131, the other end is abutted against the front contact piece 136, and the centering spring one 137a is matched with the centering spring two 137b in an initial state, so that the first butt contact 138 and the second butt contact 139 are positioned between the front contact piece 136 and the rear contact piece 135.

More specifically, the coding logic is that one of the front contact piece 136 and the rear contact piece 135 is a conductive piece, and the other is an insulating piece, if the front contact piece 136 is a conductive piece and the rear contact piece 135 is an insulating piece, the second decryption mechanism 220 in the plug device 200 needs to apply a repulsive force to the first magnet 134 to enable the sliding rod 133 to slide towards the inside of the barrel 131, the front contact piece 136 slides backwards and is in contact with the first butt contact 138 and the second butt contact 139 to be connected, and the second encryption mechanism 130 decrypts the data; if the front contact piece 136 is an insulating piece and the rear contact piece 135 is a conducting piece, the second decryption mechanism 220 in the connector 200 needs to apply an attractive force to the first magnet 134 to make the sliding rod 133 slide towards the outside of the barrel 131, the rear contact piece 135 will slide forward and contact with the first mating contact 138 and the second mating contact 139, and the second encryption mechanism 130 decrypts the data.

More specifically, in order to facilitate the first magnet 134 and the output contact 140 to be connected with the plug device 200, a first quincunx groove 116 is coaxially formed on the end surface of the end cover 111, the first quincunx groove 116 forms four petal-shaped grooves which are communicated with each other, the four first magnets 134 and the output contact 140 correspond to the four petal-shaped grooves one by one, and the first magnets 134 and the output contact 140 are disposed at the left side of the petal-shaped grooves.

The first encryption mechanism 120 specifically performs the decryption process, namely, the first decryption mechanism 210 is inserted into the mounting cylinder 110 along the insertion hole 117, then, the first decryption mechanism 210 arches upwards along the inner sunken groove 115 to push the butt joint piece 122 outwards, the butt joint piece 122 rotates around a fixed shaft close to the butt joint block 122 until the butt joint piece 122 is contacted and communicated with the butt joint block 122, the first encryption mechanism 120 is internally conducted, the first encryption mechanism 120 decrypts and bends, and the first line segment 151 is communicated with the second line segment 152; the specific decryption process of the second encryption mechanism 130 is that the second decryption mechanism 220 applies a repulsive force or an attractive force to the first magnet 134, if the front contact piece 136 is a conductive piece and the rear contact piece 135 is an insulating piece, the second decryption mechanism 220 in the plug device 200 needs to apply a repulsive force to the first magnet 134 to enable the sliding rod 133 to slide towards the inside of the cylinder 131, the front contact piece 136 slides backwards and is in contact with and communicated with the first butt contact 138 and the second butt contact 139, and the second encryption mechanism 130 decrypts; if the front contact piece 136 is an insulating piece and the rear contact piece 135 is a conducting piece, the second decryption mechanism 220 in the plug device 200 needs to apply an attractive force to the first magnet 134 to enable the sliding rod 133 to slide towards the outside of the barrel 131, the rear contact piece 135 slides forwards and is in contact with the first butt contact 138 and the second butt contact 139 to be connected, the second encryption mechanism 130 decrypts, the second encryption mechanism 130 is internally conducted, the second line segment 152 is communicated with the third line segment 153, at the moment, the output lead 150 is internally conducted, and data transmission is achieved through the output contact 140 and the input contact 130 which are in contact.

The first decryption mechanism 210 comprises an insulated decryption cylinder 211, the diameter of the decryption cylinder 211 is equal to the inner diameter of the installation cylinder 110, the decryption cylinder 211 can be inserted into the installation cylinder 110 along the insertion space 117, the insertion front end of the decryption cylinder 211 is coaxially provided with a circular telescopic block 212, the diameter of the telescopic block 212 is equal to that of the decryption cylinder 211, the decryption cylinder 211 is provided with fan-shaped sliding grooves 213a which are coaxially arranged at an eccentric position close to one end face of the telescopic block 212, the sliding grooves 213a are provided with four sliding blocks 213a which are arranged in an array manner along the circumferential direction of the decryption cylinder 211, the eccentric position of the telescopic block 212 close to one end face of the decryption cylinder 211 is coaxially and fixedly provided with fan-shaped sliding blocks 213b, the sliding blocks 213b are provided with four sliding blocks 213b which are arranged in an array manner along the circumferential direction of the telescopic block 212, the sliding blocks 213b are matched with the sliding grooves 213a and the sliding blocks 213b are inserted into, the eccentric position of the decryption cylinder 211 close to one end face of the telescopic block 212 is provided with a first accommodating groove 214a, the first accommodating groove 214 is located between two adjacent sliding grooves 213a, the first accommodating groove and the second accommodating groove 214a penetrate through the outer circular surface of the decryption cylinder 211, the eccentric position of the telescopic block 212 close to one end face of the decryption cylinder 211 is provided with a second accommodating groove 214b, the second accommodating groove 214b is located between two adjacent sliding blocks 213b, the second accommodating groove 214b penetrates through the outer circular surface of the decryption cylinder 211, when the sliding block 213b is completely inserted into the sliding groove 213a, the first accommodating groove 214a and the second accommodating groove 214b can form a complete accommodating groove, the first protruding block 215a and the second protruding block 215b which can be arched upwards are hinged inside the accommodating groove, and the first protruding block 215a and the second protruding block 215b are arched upwards and penetrate through the inner sunken groove 215 to realize the pushing against the connecting sheet 122.

Specifically, the first projection 215a and the second projection 215b are rectangular block structures, the sum of the length of the first projection 215 and the length of the second projection 215b is greater than the length of the accommodating groove, one end of the first projection 215a is hinged to one end of the accommodating groove 214b, which is away from the accommodating groove 214a, and a hinge axis formed by the hinged connection is axially perpendicular to the axial direction of the decryption cylinder 211, one end of the second projection 215b is hinged to one end of the accommodating groove and the other end of the 214a, which is away from the accommodating groove 214b, and a hinge axis formed by the hinged connection is axially perpendicular to the axial direction of the decryption cylinder 211, the other end of the first projection 215a is hinged to the other end of the second projection 215b, and a hinge axis formed by the hinged connection is axially perpendicular to the axial direction of the decryption cylinder 211, and in an initial state, the first projection 215a and the second projection 215b are accommodated in the accommodating groove 214a and the first projection 215a and the second projection 215b and form an, when the decryption cylinder 211 is inserted into the mounting cylinder 110, the first projection 215a and the second projection 215b are aligned with the inner sunken groove 215, and the first projection 215a and the second projection 215 are arched upwards and penetrate through the inner sunken groove 215 to push the contact piece 122 by driving the telescopic block 212 to slide close to the decryption cylinder 211.

More specifically, a sleeve 216 is coaxially and fixedly arranged at the middle position of one end face of the telescopic block 212 close to the decryption cylinder 211, the sleeve 216 is positioned between the sliding blocks 213b, a screw rod 217 is coaxially and rotatably arranged inside the decryption cylinder 211, one end of the screw rod 217 is inserted into the sleeve 216 and forms threaded connection and matching with the sleeve 216, the other end of the screw rod 217 extends to the outside of the decryption cylinder 211, a cap-shaped knob 218 is coaxially and fixedly arranged at the end of the screw rod 217, anti-slip threads are arranged on the outer circular surface of the knob 218, a handle 219 is coaxially sleeved on the outer circular surface of one end of the decryption cylinder 211 close to the knob 218, the handle 219 is in movable contact with the knob 218, the handle 219 is convenient for a user to pinch, the screw rod 217 is driven to rotate by rotating the knob 218, so that the telescopic block 212 is close to.

During the operation of the first decryption mechanism 210, the first decryption cylinder 211 is inserted into the mounting cylinder 110 along the insertion hole 117, the first projection 215a and the second projection 215b are aligned with the inner sunken groove 115, then the knob 218 is rotated to drive the lead screw 217 to rotate, the lead screw 217 pulls the sleeve 216 to move towards the inside of the decryption cylinder 211, the expansion block 212 moves close to the decryption cylinder 211, the first projection 215a and the second projection 215b rotate around the corresponding hinge shafts and are upwardly arched and protrude from the accommodating groove, the first projection 215a and the second projection 215b are arched to form a V-shaped structure and penetrate through the inner sunken groove 215 to abut against the butt-joint piece 122, the butt-joint piece 122 rotates around the fixed shaft to be in contact with the butt-joint block 121, and the inside of the first encryption mechanism 120 is conducted to realize decryption.

The second decryption mechanism 220 comprises an insulating cross 221 coaxially and fixedly sleeved on the decryption cylinder 211, the cross 211 comprises a support arm extending outwards along the radial direction of the decryption cylinder 211, the end part of the support arm is provided with an arc surface, the cross 221 is arranged close to the handle 219, a second magnet 222 is embedded on one end surface of the support arm along the insertion direction of the decryption cylinder 211, the second magnet 222 is matched with the first magnet 222 in a one-to-one correspondence mode according to the coding logic of the first magnet 134, the input contact 230 is also embedded on one end surface of the support arm along the insertion direction of the decryption cylinder 211, when the decryption cylinder 211 is inserted into the installation cylinder 110, the cross 221 is in contact with the groove bottom of the first quincunx groove 116, the four pairs of first magnets 134 are in aligned fit with the second magnets 222, and the four pairs of output contacts 140 are in aligned contact connection with.

During the operation of the second decryption mechanism 220, when the decryption cylinder 211 is inserted into the mounting cylinder 110, the first decryption mechanism 210 decrypts the first encryption mechanism 120, and at the same time, the four pairs of first magnets 134 are aligned and matched with the second magnets 222, and the second magnets 222 apply repulsive force or attractive force to the first magnets 134, the rule is the coding logic of the first magnets 134, that is, if the front contact pieces 136 are conducting pieces and the rear contact pieces 135 are insulating pieces, the second magnets 222 apply repulsive force to the first magnets 134 to enable the sliding rods 133 to slide towards the inside of the cylinder 131, the front contact pieces 136 slide backwards and are in contact with the first abutting contacts 138 and the second abutting contacts 139, and the second encryption mechanism 130 decrypts and conducts; if the front contact piece 136 is an insulating piece and the rear contact piece 135 is a conducting piece, the second magnet 222 exerts an attractive force on the first magnet 134 to make the sliding rod 133 slide towards the outside of the barrel 131, the rear contact piece 135 slides forwards and is in contact with the first abutting contact 138 and the second abutting contact 139, and the second encryption mechanism 130 decrypts and conducts.

In order to avoid the separation between the transmission device 100 and the plug device 200 after the butt joint, a limiting mechanism 160 for limiting and constraining the cross 221 is further arranged on an end cover 111 of the transmission device 100, the limiting mechanism 160 comprises a circular limiting disc 161 coaxially and fixedly arranged at an opening of the first quincunx groove 116, a second quincunx groove 162 is also formed in an end face of the limiting disc 161 away from the end cover, the second quincunx groove 162 is arranged opposite to the first quincunx groove 116, the second quincunx groove 162 and the first quincunx groove 116 are completely identical in structure, shape and size, a through groove 163 for passing the cross 221 is formed in the right side portion of the second quincunx groove 162, the limiting mechanism 160 further comprises a fixing cap 164 which is coaxially and fixedly connected with the end cover 111 and sleeved outside the first quincunx groove 116 and the second quincunx groove 162, a cross hole 165 for passing the decryption cylinder 211 and the cross 221 are formed in the end face of the fixing cap 164, and a left side portion of the second quincunx groove 162 are formed in a hole 165 for passing the Opposite to each other, the depth of the first quincunx groove 116 is equal to the thickness of the cross 221.

During the operation of the limiting mechanism 160, the decryption cylinder 211 is inserted into the mounting cylinder 110 along the cross hole 165 and the insertion hole 117, the cross frame 221 is aligned with the cross hole 165, the cross frame 221 is firstly inserted into the second quincunx groove 162, at this time, the decryption cylinder 211 is rotated clockwise, the cross frame 221 is aligned with the through groove 163, the decryption cylinder 211 is further inserted, the cross frame 221 is inserted into the quincunx grooves 116, at this time, the decryption cylinder 211 is rotated counterclockwise, the cross frame 221 is contacted with the left side of the first quincunx groove 116, the first magnet 134 is aligned with the second magnet 222, the output contact 140 is contacted with the input contact 230, and the first bump 215a is aligned with the second bump 215b, which is remarkable in that, on one hand, the cross frame 221 is clamped to realize the fixed fit of the transmission device 100 and the insertion device 200, so as to prevent the transmission device from falling off, on the other hand, the stopper mechanism 160 also has a certain mechanical encryption function.

Claims (10)

1. The double-encryption data port applied to the secret data transmission is characterized in that: the transmission device is internally mechanically encrypted and a transmission channel is disconnected, the plug-in device is matched with the transmission device in a plug-in fit manner and can decrypt the inside of the transmission device to enable the transmission channel to be conducted, and the conducted transmission device is communicated with the plug-in device in a data connection manner and enables an encrypted data transmission channel to be established between the memory and the mobile hard disk;

the transmission device comprises an insulating mounting cylinder, a first encryption mechanism, a second encryption mechanism, an output contact and an output lead, wherein the first encryption mechanism, the second encryption mechanism, the output contact and the output lead are arranged on the outer circular surface of the mounting cylinder;

the plug device comprises a first decryption mechanism, a second decryption mechanism, an input contact and an input lead, wherein one end of the input lead is in butt joint with the input contact, the other end of the input lead is in butt joint with the mobile hard disk, the first decryption mechanism is used for decrypting the first encryption mechanism and conducting the inside of the first encryption mechanism, and the second decryption mechanism is used for decrypting the second encryption mechanism and conducting the inside of the second encryption mechanism.

2. The dual encryption data port for secure data transmission as recited in claim 1, wherein: the installation cylinder is of a circular cylinder structure, openings are formed in two ends of the installation cylinder, a circular end cover is coaxially and fixedly arranged at one end of the installation cylinder, the diameter of the end cover is larger than that of the installation cylinder, inserting holes which are coaxially arranged are formed in the end cover, the aperture of the inserting holes is equal to the inner diameter of the installation cylinder, a cylindrical thin-wall shell is coaxially sleeved outside the installation cylinder, the shell is fixedly connected with the end cover, the installation cylinder is sealed by the shell and the end cover, a first encryption mechanism and a second encryption mechanism are arranged between the outer circular surface of the installation cylinder and the inner circular surface of the shell, an output contact penetrates through the end cover and is flush with the end surface protruding from the end cover, the first encryption mechanism, the second encryption mechanism, the output contact and the output lead are provided with four groups.

3. The dual encryption data port for secure data transmission as recited in claim 1, wherein: the output wire comprises a first line segment, a second line segment and a third line segment, one end of the first line segment extends to the outside of the shell and is connected and communicated with the memory, the other end of the first line segment is connected and communicated with one end of the encryption mechanism, one end of the second line segment is connected and communicated with the other end of the encryption mechanism, the other end of the second line segment is connected and communicated with one end of the encryption mechanism, one end of the third line segment is connected and communicated with the other end of the encryption mechanism, and the other end of the third line segment is connected.

4. The dual encryption data port for secure data transmission according to claim 1 or 2, wherein: the mounting cylinder is characterized in that a partition plate which is arranged along the radial direction of the mounting cylinder in an outward extending mode is fixedly arranged on the outer circular surface of the mounting cylinder, one end of the partition plate extends to one end portion of the mounting cylinder, the other end of the partition plate extends to the other end portion of the mounting cylinder, the partition plates are four in number and are arranged in an array mode along the circumferential direction where the mounting cylinder is located, a mounting area is formed between every two adjacent partition plates, and the four groups of encryption mechanisms I and the encryption mechanisms II correspond to the mounting area one to one and the encryption mechanisms I and the encryption mechanisms.

5. The dual encryption data port for secure data transmission as recited in claim 4, wherein: the outer circular surface of the mounting cylinder is also provided with a rectangular mounting plate which extends outwards along the radial direction of the mounting cylinder, the mounting plate is positioned between two adjacent partition plates, the two mounting plates are arranged in parallel and are arranged at intervals, the first encryption mechanism comprises a butt joint block fixedly arranged between the two mounting plates and an elastic butt joint sheet rotatably arranged between the two mounting plates, the butt joint block is close to one end of the mounting plate, a fixed shaft formed at the rotary joint between the butt joint sheet and the mounting plates is close to the other end of the mounting plate, the movable end of the butt joint sheet extends to a position between the butt joint block and the outer circular surface of the mounting cylinder, the butt joint sheet is contacted with the outer circular surface of the mounting cylinder around the fixed shaft under the action of the elasticity of the butt joint sheet in an initial state and is separated from the butt joint block, the other end of the first line segment is connected with the butt joint sheet, the inner sinking groove is aligned with the two mounting plates which are arranged in parallel, the inner sinking groove is arranged to be inverted trapezoid and gradually narrowed from the inner part of the mounting cylinder to the outer opening, and the small opening of the inner sinking groove is aligned with the middle position of the butt joint piece.

6. The dual encryption data port for secure data transmission as recited in claim 4, wherein: the second encryption mechanism is located between the mounting plate and the end cover, the second encryption mechanism comprises an insulating cylinder body fixedly connected with the mounting cylinder, the axial direction of the cylinder body is parallel to the axial direction of the mounting cylinder, a first contact and a second butt contact penetrate through the outer circular surface of the cylinder body and are symmetrically arranged along the axial direction of the cylinder body, the first contact and the second butt contact extend to the inside of the cylinder body from the outside of the cylinder body, the other end of the second line segment is connected with the second butt contact, and one end of the third line segment is connected with the second butt contact.

7. The dual encryption data port for secure data transmission as recited in claim 6, wherein: the rear end of the barrel is arranged close to the mounting plate, the front end of the barrel is arranged close to the end cover, the rear end of the barrel is opened and arranged, a sealing block for sealing and plugging the opening is arranged at the opening, the front end of the barrel is sealed and arranged, a sliding rod which is in sliding guide fit with the sliding rod is coaxially penetrated through the sealing block, one end of the sliding rod is always positioned outside the barrel, the other end of the sliding rod is always positioned inside the barrel, a first round magnet is coaxially and fixedly arranged at one end of the sliding rod, which is positioned outside the barrel, the first magnet is positioned in a floating hole formed in the end cover and can float along the axial direction of the floating hole, a front annular contact piece and a rear annular contact piece are coaxially and fixedly sleeved on the outer circumferential surface of the inside of the barrel, the front contact piece and the rear contact piece are both positioned at the middle position of the barrel in the initial state, a gap, The other end of the middle spring is abutted against the rear contact piece, a second middle spring is arranged between the front contact piece and the closed end of the barrel, one end of the second middle spring is abutted against the closed end of the barrel, the other end of the second middle spring is abutted against the front contact piece, the first middle spring is matched with the second middle spring in an initial state, and the first opposite contact head and the second opposite contact head are located between the front contact piece and the rear contact piece.

8. The dual encryption data port for secure data transmission as recited in claim 6, wherein: one of the front contact piece and the rear contact piece is a conducting piece, the other is an insulating piece, if the front contact piece is the conducting piece and the rear contact piece is the insulating piece, a decryption mechanism II in the plugging device needs to apply repulsive force to a magnet I to enable the sliding rod to slide towards the inside of the cylinder body, the front contact piece slides backwards and is in contact connection with a pair contact head I and a pair contact head II, and the encryption mechanism II decrypts; if the front contact piece is an insulating piece and the rear contact piece is a conducting piece, a decryption mechanism II in the plug-in device needs to apply attraction force to the magnet I to enable the sliding rod to slide towards the outside of the barrel, the rear contact piece slides forwards and is in contact with the contact head I and the butt contact head II to be communicated, and the encryption mechanism II decrypts.

9. The dual encryption data port applied to secure data transmission according to claim 1 or 8, wherein: the end face of the end cover is coaxially provided with a first quincunx groove which forms four petal-shaped grooves communicated with each other, the four groups of first magnets and output contacts correspond to the four petal-shaped grooves one by one, and the first magnets and the output contacts are arranged at the left side parts of the petal-shaped grooves.

10. The dual encryption data port for secure data transmission as recited in claim 1, wherein: the decryption mechanism comprises an insulated decryption cylinder, the diameter of the decryption cylinder is equal to the inner diameter of the installation cylinder, the decryption cylinder can be inserted into the installation cylinder along the insertion space, the insertion front end of the decryption cylinder is coaxially provided with a circular telescopic block, the diameters of the telescopic block and the decryption cylinder are equal, the eccentric position of the decryption cylinder, which is close to one end face of the telescopic block, is provided with coaxially arranged fan-shaped sliding grooves, the sliding grooves are provided with four and are arranged in an array manner along the circumferential direction of the decryption cylinder, the eccentric position of the telescopic block, which is close to one end face of the decryption cylinder, is coaxially and fixedly provided with fan-shaped sliding blocks, the sliding blocks are provided with four and are arranged in an array manner along the circumferential direction of the telescopic block, the sliding blocks are matched with the sliding grooves, the sliding blocks are inserted into the sliding grooves, the sliding blocks and the sliding grooves form sliding guide fit along the axial direction of the decryption cylinder, the receiving groove and the outer circular surface penetrating the decryption cylinder are arranged, a second receiving groove is formed in the eccentric position, close to one end face of the decryption cylinder, of the telescopic block and is located between the two adjacent sliding blocks, the second receiving groove penetrates the outer circular surface of the decryption cylinder, when the sliding blocks are completely inserted into the sliding grooves, the first receiving groove and the second receiving groove can form a complete receiving groove, and a first protruding block and a second protruding block which can be arched upwards are hinged and arranged in the receiving groove;

the first projection and the second projection are of rectangular block structures, the sum of the length of the first projection and the length of the second projection is greater than that of the accommodating groove, one end of the first projection is hinged with one end of the accommodating groove, which is far away from the accommodating groove, of the second accommodating groove, the axial direction of a hinge shaft formed at the hinged joint is perpendicular to the axial direction of the decryption cylinder, one end of the second projection is hinged with one end of the accommodating groove, which is far away from the accommodating groove, of the second accommodating groove, the axial direction of the hinge shaft formed at the hinged joint is perpendicular to the axial direction of the decryption cylinder, the other end of the first projection is hinged with the other end of the second projection, the axial direction of the hinge shaft formed at the hinged joint is perpendicular to the axial direction of the decryption cylinder, the first projection and the second projection are accommodated in the first accommodating groove and the second accommodating groove in an initial state, the included angle, which, the second bump is aligned with the inner sinking groove;

the middle position of the telescopic block close to one end face of the decryption cylinder is coaxially and fixedly provided with a sleeve, the sleeve is positioned between the sliding blocks, a screw rod is coaxially and rotatably arranged in the decryption cylinder, one end of the screw rod is inserted in the sleeve and forms threaded connection fit with the sleeve, the other end of the screw rod extends to the outside of the decryption cylinder, the end of the screw rod is coaxially and fixedly provided with a cap-shaped knob, the outer circular surface of the knob is provided with anti-skid grains, the outer circular surface of the decryption cylinder close to one end of the knob is coaxially sleeved with a handle, and the handle is in movable;

the decryption mechanism II comprises an insulating cross coaxially and fixedly sleeved on the decryption cylinder, the cross comprises a support arm extending outwards along the radial direction of the decryption cylinder, the end part of the support arm is arranged to be an arc surface, the cross is arranged close to the handle, a magnet II is embedded on one end surface of the support arm along the insertion direction of the decryption cylinder, the magnet II is matched with the support arm in a one-to-one correspondence mode according to the coding logic of the magnet I, the input contact is also embedded on one end surface of the support arm along the insertion direction of the decryption cylinder, when the decryption cylinder is inserted into the installation cylinder, the cross is in contact with the groove bottom of the quincunx-shaped groove I, four pairs of magnets I are aligned with the magnet II and matched, and four pairs of output contacts are aligned with the input;

the end cover of the transmission device is also provided with a limiting mechanism for limiting and constraining the cross, the limiting mechanism comprises a circular limiting disc coaxially and fixedly arranged at the opening of the first quincunx groove, one end surface of the limiting disc, which is far away from the end cover, is also provided with a second quincunx groove, the second quincunx groove is arranged opposite to the first quincunx groove, and the second quincunx groove and the first quincunx groove are in structures and shapes, the sizes of the two parts are completely consistent, the right side part of the first quincunx groove is provided with a through groove for the cross support arm to pass through, the limiting mechanism further comprises a fixing cap which is coaxially and fixedly connected with the end cover and is sleeved outside the first quincunx groove and the second quincunx groove, a cross hole for the decryption cylinder to pass through and opposite to the left side part of the second quincunx groove are formed in the end face of the fixing cap, and the depth of the first quincunx groove is equal to the thickness of the cross.

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