An electronic seal based on memory alloy

Abstract

The application discloses a kind of electronic seal based on memory alloy, including lock body and lock head, the lock body includes bottom box part, the bottom box part is provided with the rotatable lock of being able to rotate and open lock with the lock head adaptation, control circuit board is further provided on the bottom box part, memory alloy wire for realizing rotation and opening lock is connected into circuit, the memory alloy wire is wound in the rotatable lock, lock core fixed base is fixed on the bottom box part, the center of the lock core fixed base is provided with springback device, the rotatable lock is rotatably connected on the lock core fixed base upper side, and opening and closing are realized by memory alloy driving lock hook movement, cost is only about one sixth of conventional motor structure cost, and the speed of opening lock is fast, and from power-on to opening lock is not more than 400ms, long service life, and use frequency can be more than 10000 times.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electronic seals, in particular to an electronic seal based on memory alloy. BACKGROUND

[0002] Electronic seal is a kind of disposable plastic shell seal that can be used to seal containers, bags, boxes, etc. self-locking , prevent opening , with bar code, two-dimensional barcode , RFID chip. Each seal has a unique code, including bar code or two-dimensional code, RFID chip for intelligent handheld terminal identification, and code for human eye identification. Electronic seal uses non-contact automatic identification technology, which can automatically identify targets, obtain relevant data, and can intelligently read and write and communicate conversion, and realize computer software management. The digital ID of the electronic seal tag has global uniqueness, and the sealing and unsealing management process is completed through the RFID reader, and the data is downloaded and transmitted remotely.

[0003] The RFID electronic seal in the related art still has some places that can be improved and optimized:

[0004] 1. Driven by motor, high cost, needs to be improved;

[0005] 2. The number of unlocking times is not enough, and needs to be optimized;

[0006] 3. The unlocking time is 2-4s, and the unlocking is not fast enough, and needs to be improved.

[0007] Therefore, the present application provides an electronic seal based on memory alloy, which is faster, longer in service life and lower in cost. SUMMARY

[0008] In order to overcome the defects in the prior art, the present application provides an electronic seal based on memory alloy, which is driven by memory alloy to drive the movement of the lock hook to realize opening and closing, and the cost is only about one sixth of the cost of the conventional motor structure, the unlocking speed is fast, the time from power-on to unlocking is not more than 400ms, the service life is long, and the number of uses can exceed 10000 times.

[0009] TECHNICAL SCHEME

[0010] An electronic seal based on memory alloy, comprising a lock body and a lock head, the lock body comprising a bottom box part, the bottom box part being provided with a rotating lock capable of rotating to unlock and being adapted to the lock head, the bottom box part being further provided with a control circuit board, the control circuit board connecting a memory alloy wire for realizing rotating unlocking into a circuit, and the memory alloy wire being wound around the rotating lock.

[0011] Further, the bottom box part is fixed with a lock core fixing base, a rebounder is arranged at the center of the lock core fixing base, the lock core fixing base is rotatably connected with the rotating lock on the upper side, a torsion spring is fixedly connected between the rotating lock and the lock core fixing base, the upper side of the rotating lock is further provided with a fixed column, a fixer is arranged on the bottom box part, one end of the memory alloy wire is fixedly arranged on the fixer, and the other end is fixedly arranged on the fixed column after passing around the rotating lock.

[0012] Further, a lock hole is arranged in the upper surface of the rotating lock, an extrusion groove is arranged on the inner wall of the lock hole, and a limiting part capable of being clamped into the extrusion groove and driving the rotating lock to rotate and realize locking is further arranged on the lock head.

[0013] Further, a cover plate is arranged at the bottom of the lock head, an identification chip is arranged in the lock head, an identification chip contact is arranged on the outer surface of the lock head, and an identification contact adapted to the identification chip contact is further arranged in the rotating lock.

[0014] Further, a stopper is further arranged on the rotating lock, a limiter is arranged on the bottom box part, and the stopper can be blocked by the limiter to limit the maximum rotation angle of the rotating lock.

[0015] Further, the memory alloy wire is connected to the control circuit board through a first connecting line, and the identification chip is connected to the control circuit board through a second connecting line.

[0016] Further, a magnetic power supply interface is further arranged on the lock body.

[0017] Further, a signal feedback structure is further arranged on the lock body, and the signal feedback structure is started when the control circuit board identifies that the identification chip contact and the identification contact are not matched.

[0018] Further, the memory alloy wire is selected from a nickel-titanium memory alloy, and a double-path memory effect is used, that is, the shape of the high-temperature phase change is restored when heated, and the shape of the low-temperature phase change is restored when cooled.

[0019] Further, the control circuit board 7 is loaded with a power input circuit, a control processing circuit, a lock body driving circuit, an RFID reading and writing circuit and an identification chip detection circuit.

[0020] Further, the diameter of the lower end of the lock head is equal to the diameter of the lock hole, and the distance between the two limiting parts is greater than the diameter of the lock hole.

[0021] Beneficial effects

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] 1. The unlocking speed is fast, from power-on to unlocking, no more than 400 ms, and the time of conventional motor control is usually about 2-4 s;

[0024] 2. Long service life, more than 10,000 times;

[0025] 3. Small size, only memory alloy wire and current limiting resistor are used for unlocking related structure;

[0026] 4. Low power consumption, low driving voltage of memory alloy wire, and usually short power-on time, lower power consumption;

[0027] 5. Low cost, memory alloy wire scheme is only about one sixth of the cost of conventional motor structure;

[0028] 6. Waterproof, not easy to rust. BRIEF DESCRIPTION OF DRAWINGS

[0029] figure 1 is a structure diagram of an electronic seal based on memory alloy in the application;

[0030] figure 2 is a structure diagram of a rotating lock;

[0031] figure 3 is an exploded structure diagram of a rotating lock.

[0032] REFERENCE NUMERALS

[0033] lock head 1, memory alloy wire 2, lock body 3, first connecting wire 4, rotating lock 5, second connecting wire 6, control circuit board 7, magnetic attraction power supply interface 8, fixator 9, extrusion groove 10, position limiter 11, stop block 12, bottom box part 13, fixed column 14, identification chip contact 15, identification chip 16, cover plate 17, identification contact 18, torsion spring 19, rebounder 20, lock core fixing base 21, lock hole 22, limiting part 23. DETAILED DESCRIPTION

[0034] To better illustrate the content of the application, the following will be described in conjunction with the drawings and examples:

[0035] There figures 1-3 As shown in the drawings, the application discloses an electronic seal based on memory alloy, which comprises a lock body 3 and a lock head 1, the lock body 3 comprises a bottom box part 13, the bottom box part 13 is provided with a rotating lock 5 capable of rotating to unlock and matching the lock head 1, the bottom box part 13 is also provided with a control circuit board 7, the control circuit board 7 connects a memory alloy wire 2 for realizing rotation unlocking into a circuit, and the memory alloy wire 2 is wound around the rotating lock 5.

[0036] Further, the bottom box part 13 is fixed with a lock core fixing base 21, the center of the lock core fixing base 21 is provided with a spring 20, the upper side of the lock core fixing base 21 is rotatably connected with the rotating lock 5, the rotating lock 5 and the lock core fixing base 21 are fixedly connected with a torsion spring 19, the upper side of the rotating lock 5 is also provided with a fixed column 14, the bottom box part 13 is provided with a fixer 9, one end of the memory alloy wire 2 is fixed to the fixer 9, the other end is fixed to the fixed column 14 after passing through the rotating lock 5.

[0037] Further, the upper surface of the rotating lock 5 is provided with a lock hole 22, the inner wall of the lock hole 22 is provided with an extrusion groove 10, the lock head 1 is also provided with a limiting part 23 which can be clamped into the extrusion groove 10 and drive the rotating lock 5 to rotate and realize locking.

[0038] Further, the bottom of the lock head 1 is provided with a cover plate 17, the inside of the lock head 1 is provided with an identification chip 16, the outer surface of the lock head 1 is provided with an identification chip contact 15, the inside of the rotating lock 5 is also provided with an identification contact 18 which is matched with the identification chip contact 15.

[0039] Further, the rotating lock 5 is also provided with a stop block 12, the bottom box part 13 is provided with a limiter 11, the stop block 12 can be blocked by the limiter 11 so as to limit the maximum rotation angle of the rotating lock 5.

[0040] Further, the memory alloy wire 2 is connected to the control circuit board 7 through the first connecting line 4, the identification chip 16 is connected to the control circuit board 7 through the second connecting line 6.

[0041] Further, the lock body 3 is also provided with a magnetic power supply interface 8.

[0042] Further, the lock body 3 is also provided with a signal feedback structure (not shown), when the control circuit board 7 identifies that the identification chip contact 15 and the identification contact 18 do not match, the signal feedback structure is started.

[0043] Further, the memory alloy wire 2 selects nickel-titanium memory alloy, uses double memory effect, that is, restores high temperature phase deformation shape when heated, and restores low temperature phase deformation shape when cooled.

[0044] Further, the control circuit board 7 is loaded with power input circuit, control processing circuit, lock body driving circuit, RFID read-write circuit and identification chip detection circuit.

[0045] Further, the diameter of the lower end of the lock head 1 is equal to the diameter of the lock hole 22, the distance between the two limiting parts 23 is greater than the diameter of the lock hole 22.

[0046] Specifically, the initial state is set as the locked state;

[0047] When the lock needs to be opened, the magnetic power supply structure 8 supplies power, the RFID read-write circuit receives the opening instruction and passes the authentication, and the control processing circuit sends an opening signal to the lock body driving circuit, at this time the memory alloy wire 2 is electrified and heated, thereby rapidly shrinking and pulling the rotating lock 5 to rotate, at this time the torsional spring 19 is energized, and when the rotating lock 5 rotates to a certain angle, the rotating lock 5 no longer restricts the lock head 1, so that the lock head 1 is ejected under the elastic force of the spring 20, realizing the opening operation, and the rotating lock 5 is simultaneously rotated under the elastic force of the torsional spring 19;

[0048] The user can read the historical opening information of the lock opening and closing through the RFID reader;

[0049] When the lock is closed, the lock head 1 is pressed into the lock hole 22, at this time the limiting portion 23 is inserted into the extrusion groove 10, and then the rotating lock 5 is rotated through the inclined extrusion groove 10, at this time the torsional spring 19 is energized, until the limiting portion 23 is inserted into the lock hole 22 and penetrates the extrusion groove 10, at this time the limiting portion 23 is no longer limited by the extrusion groove 10, and the rotating lock 5 is rotated under the elastic force of the torsional spring 19, and the limiting portion 23 will be clamped by the inner wall of the lock hole 22, and at the same time the lock head 1 is inserted, the spring 20 is pressed and energized, so that the lock head 1 can be ejected when the lock is opened;

[0050] When the lock is normally closed, the identification chip contact 15 will contact the identification contact 18, and accordingly the control circuit board 7 identifies whether the lock head 1 is normally locked, so as to judge whether the lock is correctly closed, and if the identification chip is not matched, the sealed lock will issue a warning through the signal feedback structure.

[0051] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the technical solutions of the present application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or replace some technical features thereof with equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A memory metal based electronic seal, characterized by: The application relates to a lock body (3) and a lock head (1), wherein the lock body (3) comprises a bottom box part (13) provided with a rotating lock (5) capable of being unlocked and capable of being matched with the lock head (1), and a control circuit board (7) is further arranged on the bottom box part (13) and is connected with a memory alloy wire (2) for realizing the rotating unlocking, and the memory alloy wire (2) is wound on the rotating lock (5); A lock core fixing base (21) is fixedly arranged on the bottom box part (13), a rebounder (20) is arranged at the center of the lock core fixing base (21), the rotating lock (5) is rotationally connected to the upper side of the lock core fixing base (21), a torsion spring (19) is fixedly connected between the rotating lock (5) and the lock core fixing base (21), a fixed column (14) is further arranged on the upper side of the rotating lock (5), a fixer (9) is arranged on the bottom box part (13), one end of the memory alloy wire (2) is fixedly arranged on the fixer (9), and the other end of the memory alloy wire (2) is fixedly arranged on the fixed column (14) after passing through the rotating lock (5); A lock hole (22) is arranged in the upper surface of the rotating lock (5), an extrusion groove (10) is arranged on the inner wall of the lock hole (22), and a limiting part (23) capable of being clamped into the extrusion groove (10) and capable of driving the rotating lock (5) to rotate and realize locking is further arranged on the lock head (1); A cover plate (17) is arranged on the bottom of the lock head (1), an identification chip (16) is arranged in the lock head (1), an identification chip contact (15) is arranged on the outer surface of the lock head (1), and an identification contact (18) matched with the identification chip contact (15) is further arranged in the rotating lock (5); A stop block (12) is further arranged on the rotating lock (5), a limiter (11) is arranged on the bottom box part (13), and the stop block (12) can be blocked by the limiter (11) so as to limit the maximum rotating angle of the rotating lock (5); The memory alloy wire (2) is connected with the control circuit board (7) through a first connecting line (4), and the identification chip (16) is connected with the control circuit board (7) through a second connecting line (6); A magnetic power supply interface (8) is further arranged on the lock body (3); A signal feedback structure is further arranged on the lock body (3), and the signal feedback structure is started when the control circuit board (7) identifies that the identification chip contact (15) and the identification contact (18) are not matched.

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