CN116876928A - RFID padlock based on memory alloy - Google Patents

Abstract

The invention discloses an RFID padlock based on a memory alloy, which comprises a lock body shell and a lock beam, wherein a box body is arranged in the lock body shell, one end of the lock beam extends into the lock body shell and penetrates through the box body, an unlocking spring which is positioned in the box body and sleeved on the lock beam is arranged between the box body and the lock beam, a clamp spring which is clamped at the end part of the lock beam is arranged at the lower side of the box body, a lock head is arranged at the other end of the lock beam, a mounting plate which is fixedly arranged in the lock body shell is arranged at the other side of the box body, a rotary lock which can be rotationally unlocked and is matched with the lock head is arranged on the mounting plate, the unlocking speed is high, the time from electrifying to unlocking is not more than 400ms, the service life is usually about 2-4s, the number of times can be more than 10000 times, the volume is small, and the related structure only needs to use of a memory alloy wire and a current limiting resistor.

Description

RFID padlock based on memory alloy

Technical Field

The invention relates to the field of RFID padlocks, in particular to an RFID padlock based on memory alloy.

Background

The RFID electronic lock is an electronic lock with higher safety level and is manufactured by adopting high-temperature flame-retardant modified ABS engineering plastic, and has the functions of high strength, acid and alkali corrosion resistance and impact resistance;

there are also some places in the related art where the RFID electronic lock, i.e., RFID padlock, can be improved and optimized:

1. the motor is used for driving, so that the cost is high and the improvement is needed;

2. the unlocking times are more than 2000 times, and the unlocking times are insufficient and are to be optimized;

3. the unlocking time is 2-4s, the unlocking is not fast enough, and the lifting is needed.

Accordingly, the invention provides the memory alloy-based RFID padlock which is faster in unlocking, longer in service life and lower in cost.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the RFID padlock based on the memory alloy, which is opened and closed by driving the latch hook to move through the memory alloy, wherein the cost is only about one sixth of the cost of a conventional motor structure, the unlocking speed is high, the time from electrifying to unlocking is not more than 400ms, the service life is long, and the use times can be more than 10000 times.

Technical proposal

The utility model provides a RFID padlock based on memory alloy, includes lock body shell and lock beam, the inside of lock body shell is provided with the box, the one end of lock beam stretches into the lock body shell runs through the box, the box with be provided with between the lock beam be located the inside and suit of box in the spring that unblanks of lock beam, the downside of box be provided with the cartridge in the jump ring of lock beam tip, the other end of lock beam is provided with the tapered end, the opposite side of box be provided with set firmly in the inside mounting panel of lock body shell, be provided with on the mounting panel can rotatory unblank and with the rotatory lock of tapered end adaptation, the winding has the memory wire that is used for rotatory unblanking on the rotatory lock, the inside of lock body shell still is provided with the control circuit board, the control circuit board will the memory wire inserts the circuit.

Further, lock core unable adjustment base has been set firmly on the mounting panel, lock core unable adjustment base's center department is provided with the resilience ware, lock core unable adjustment base upside rotates to be connected with rotate the lock, rotate the lock with fixedly connected with torsion spring between the lock core unable adjustment base, the upside of rotating the lock still is provided with the fixed column, be provided with the fixer on the mounting panel, memory alloy wire's one end set firmly in the fixer, the other end bypass rotate the lock after set firmly in the fixed column.

Further, be provided with the lockhole in the upper surface of rotation lock, the inner wall of lockhole is provided with the extrusion groove, still be provided with on the lock head can block into the extrusion groove drives the rotation lock rotates and realizes the spacing portion of locking.

Further, the bottom of tapered end is provided with the apron, the inside of tapered end is provided with discernment chip, be provided with discernment chip contact on the surface of tapered end, the inside of rotating the lock still is provided with the adaptation discernment contact of discernment chip contact.

Further, a stop block is further arranged on the rotary lock, a limiter is arranged on the mounting plate, and the stop block can be blocked by the limiter so as to limit the maximum rotation angle of the rotary lock.

Furthermore, the memory alloy wire is connected to the control circuit board through a first connecting wire, and the identification chip is connected to the control circuit board through a second connecting wire.

Further, a magnetic attraction power supply interface is further arranged on the lock body shell.

Further, a signal feedback structure is further arranged on the lock body shell, and when the control circuit board recognizes that the recognition chip contact is not matched with the recognition contact, the signal feedback structure is started.

Furthermore, the memory alloy wire is made of nickel-titanium memory alloy, and a double-way memory effect is used, namely, the high-temperature phase change shape is recovered when the memory alloy wire is heated, and the low-temperature phase change shape is recovered when the memory alloy wire is cooled.

Further, the control circuit board comprises a main control circuit, a power management circuit, an RFID control circuit and a lock cylinder control circuit.

Further, the diameter of the lower end part of the lock head is approximately equal to the diameter of the lock hole, and the distance between the two limiting parts is larger than the diameter of the lock hole.

Advantageous effects

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

1. the unlocking speed is high, the unlocking time is not more than 400ms from the electrifying to the unlocking, and the control time of a conventional motor is usually about 2-4 s;

2. the service life is long, and the use times can exceed 10000 times;

3. the volume is small, and the unlocking related structure only needs to use a memory alloy wire and a current limiting resistor;

4. the memory alloy wire has low power consumption, low driving voltage, short power-on time and lower power consumption;

5. the cost is low, and the scheme of the memory alloy wire is only about one sixth of the cost of the conventional motor structure;

6. prevent water vapor and is not easy to rust.

Drawings

FIG. 1 is a schematic diagram of a memory alloy based RFID padlock of the present invention;

FIG. 2 is a schematic diagram of an explosive structure according to the present invention;

FIG. 3 is a schematic view of an exploded construction of a rotary lock;

fig. 4 is a schematic structural view of the rotary lock.

Reference numerals and signs

The lock body shell 1, the control circuit board 2, the magnetic attraction power supply interface 3, the second connecting wire 4, the first connecting wire 5, the lock beam 6, the lock head 7, the memory metal wire 8, the unlocking spring 9, the clamp spring 10, the rotary lock 11, the extrusion groove 12, the lock hole 13, the stop block 14, the mounting plate 15, the fixer 16, the fixing column 17, the limiter 18, the limiting part 19, the identification contact 20, the lock cylinder fixing base 21, the rebound device 22, the torsion spring 23, the identification chip 24, the identification chip contact 25, the cover plate 26 and the box 27.

Detailed Description

For a better illustration of the present invention, the following description is made with reference to the accompanying drawings and examples:

as shown in fig. 1-4, the invention discloses an RFID padlock based on memory alloy, which comprises a lock body shell 1 and a lock beam 6, wherein a box 27 is arranged in the lock body shell 1, one end of the lock beam 6 stretches into the lock body shell 1 and penetrates through the box 27, an unlocking spring 9 which is positioned in the box 27 and sleeved on the lock beam 6 is arranged between the box 27 and the lock beam 6, a clamp spring 10 which is clamped at the end part of the lock beam 6 is arranged at the lower side of the box 27, a lock head 7 is arranged at the other end of the lock beam 6, a mounting plate 15 which is fixedly arranged in the lock body shell 1 is arranged at the other side of the box 27, a rotary lock 11 which can be rotatably unlocked and is matched with the lock head 7 is arranged on the mounting plate 15, a memory metal wire 8 which is used for rotatably unlocking is wound on the rotary lock 11, and a control circuit board 2 is also arranged in the lock body shell 1, and the control circuit board 2 is used for accessing the memory metal wire 8 into a circuit.

Further, lock core unable adjustment base 21 has been set firmly on the mounting panel 15, lock core unable adjustment base 21's center department is provided with the resilience ware 22, lock core unable adjustment base 21 upside rotates to be connected with rotate lock 11, rotate lock 11 with fixedly connected with torsion spring 23 between the lock core unable adjustment base 21, rotate lock 11's upside still is provided with fixed column 17, be provided with fixer 16 on the mounting panel 15, memory alloy wire 8's one end set firmly in fixer 16, the other end walk around rotate lock 11 after set firmly in fixed column 17.

Further, a lock hole 13 is provided in the upper surface of the rotary lock 11, an extrusion groove 12 is provided on the inner wall of the lock hole 13, and a limit portion 19 capable of being clamped into the extrusion groove 12 and driving the rotary lock 11 to rotate and lock is further provided on the lock head 7.

Further, a cover plate 26 is arranged at the bottom of the lock head 7, an identification chip 24 is arranged in the lock head 7, an identification chip contact 25 is arranged on the outer surface of the lock head 7, and an identification contact 20 which is matched with the identification chip contact 25 is also arranged in the rotary lock 11.

Further, a stop block 14 is further arranged on the rotary lock, a limiter 18 is arranged on the mounting plate 15, and the stop block 14 can be blocked by the limiter 18 so as to limit the maximum rotation angle of the rotary lock 11.

Further, the memory alloy wire 8 is connected to the control circuit board 2 through a first connecting wire 5, and the identification chip 24 is connected to the control circuit board 2 through a second connecting wire 4.

Further, the lock body shell 1 is also provided with a magnetic attraction power supply interface 3.

Further, a signal feedback structure (not shown) is further provided on the lock body housing 1, and is activated when the control circuit board 2 recognizes that the recognition chip contact 25 is not matched with the recognition contact 20.

Furthermore, the memory alloy wire 8 is made of nickel-titanium memory alloy, and a double-pass memory effect is used, namely, the high-temperature phase change shape is recovered when heating, and the low-temperature phase change shape is recovered when cooling.

Further, the control circuit board 2 comprises a main control circuit, a power management circuit, an RFID control circuit and a lock cylinder control circuit.

Further, the diameter of the lower end of the lock 7 is approximately equal to the diameter of the lock hole 13, and the distance between the two limiting parts 19 is greater than the diameter of the lock hole 13.

Specifically, the initial state is set to be a locking state, the unlocking spring 9 is compressed, the bottommost ends of the clamping spring 10 and the lock beam 6 are positioned at the bottommost side, and the clamping spring 10 is not in contact with the box body 27;

the control circuit board 2 consists of a main control circuit, a power management circuit, an RFID control circuit and a lock cylinder control circuit, wherein an external power supply supplies power to the control circuit board 2 through a magnetic attraction power supply interface 3, and after passing through the power management circuit, the external power supply supplies power to other circuits respectively;

when unlocking, the RFID control circuit receives an unlocking signal and transmits the signal to the main control circuit, and the main control circuit controls the lock cylinder control circuit to open the electronic padlock;

the opening process is as follows: the magnetic power supply structure 3 supplies power, the RFID control circuit receives an unlocking instruction, the memory alloy wire 8 is electrified and heated at the moment, so that the memory alloy wire rapidly contracts, the rotary lock 11 is pulled to rotate, the torsion spring 23 stores energy at the moment, when the rotary lock 11 rotates to a certain angle, the rotary lock 11 does not limit the lock head 7 any more, the lock head 7 is ejected under the elastic force of the rebound device 22, the unlocking spring 9 jacks up the lock beam 6, the lock head 7 moves upwards at the same time, unlocking operation is realized, and the rotary lock 11 simultaneously rotates under the elastic force of the torsion spring 23;

the clamp spring 10 is in contact with the lower surface of the box body 27 at this time;

the user can read the historical unlocking information of unlocking and locking through the RFID reader-writer;

when the lock is closed, the lock head 7 is pressed into the lock hole 13, at the moment, the limiting part 19 is inserted into the extrusion groove 12, and then the rotary lock 11 is driven to rotate through the inclined extrusion groove 12, at the moment, the torsion spring 23 stores energy until the limiting part 19 is inserted into the lock hole 1 and penetrates through the extrusion groove 12, at the moment, the limiting part 19 is not limited by the extrusion groove 12 any more, the rotary lock 11 rotates under the elasticity of the torsion spring 23, the limiting part 19 is blocked by the inner wall of the lock hole 13, and when the lock head 7 is inserted, the rebound device 22 is pressed and stores energy, so that the lock head 7 can be ejected out during unlocking;

the unlocking spring 9 is continuously pressed at the same time of insertion, so that the lock beam 6 can be ejected out during unlocking;

during normal locking, the identification chip contact 25 will contact with the identification contact 20, and accordingly, the control circuit board 2 identifies whether the lock head 7 is normally locked, so as to judge whether the lock is correctly locked, and if the identification chip 24 is not matched, the label lock will send out a warning through a signal feedback structure;

after unlocking, the current stops, the memory alloy wire 8 slowly returns to the original state, the torsion spring 23 drives the memory alloy wire 8 to slowly return, the rotary lock 11 is enabled to return, and after the unlocking is successful, the electronic padlock can be powered down.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the technical solution of the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solution described in the foregoing embodiments may be modified or some of the technical features thereof may be equally substituted; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. An RFID padlock based on a memory alloy, characterized in that: including lock body shell (1) and lock beam (6), the inside of lock body shell (1) is provided with box (27), the one end of lock beam (6) stretch into lock body shell (1) and run through box (27), be provided with between box (27) with be located inside and the suit of lock beam (6) of box (27) in unlocking spring (9) of lock beam (6), the downside of box (27) be provided with the cartridge in jump ring (10) of lock beam (6) tip, the other end of lock beam (6) is provided with tapered end (7), the opposite side of box (27) be provided with set firmly in inside mounting panel (15) of lock body shell (1), be provided with on mounting panel (15) can rotatory unblank and with rotatory lock (11) of tapered end (7) adaptation, the winding has memory wire (8) that are used for rotatory on rotatory, the inside control panel (1) of lock body shell (1) is provided with still that control panel (2) will be unlocked, circuit (8) will be connected to memory wire.

2. The memory alloy based RFID padlock of claim 1, wherein: lock core unable adjustment base (21) has been set firmly on mounting panel (15), the center department of lock core unable adjustment base (21) is provided with resilience ware (22), lock core unable adjustment base (21) upside rotates to be connected with rotate lock (11), rotate lock (11) with fixedly connected with torsion spring (23) between lock core unable adjustment base (21), the upside of rotating lock (11) still is provided with fixed column (17), be provided with fixer (16) on mounting panel (15), the one end of memory alloy wire (8) set firmly in fixer (16), the other end bypass rotate lock (11) after set firmly in fixed column (17).

3. The memory alloy based RFID padlock of claim 2, wherein: the lock is characterized in that a lock hole (13) is formed in the upper surface of the rotary lock (11), an extrusion groove (12) is formed in the inner wall of the lock hole (13), and a limiting part (19) capable of being clamped into the extrusion groove (12) and driving the rotary lock (11) to rotate and lock is further arranged on the lock head (7).

4. A memory alloy based RFID padlock as claimed in claim 3, wherein: the bottom of tapered end (7) is provided with apron (26), the inside of tapered end (7) is provided with discernment chip (24), be provided with discernment chip contact (25) on the surface of tapered end (7), the inside of rotating lock (11) still is provided with adaptation discernment contact (20) of discernment chip contact (25).

5. The memory alloy based RFID padlock of claim 4, wherein: the rotary lock is further provided with a stop block (14), the mounting plate (15) is provided with a limiter (18), and the stop block (14) can be blocked by the limiter (18) so as to limit the maximum rotation angle of the rotary lock (11).

6. The memory alloy based RFID padlock of claim 5, wherein: the memory alloy wire (8) is connected to the control circuit board (2) through a first connecting wire (5), and the identification chip (24) is connected to the control circuit board (2) through a second connecting wire (4).

7. The memory alloy based RFID padlock of claim 6, wherein: the lock body shell (1) is also provided with a magnetic attraction power supply interface (3).

8. The memory alloy based RFID padlock of claim 7, wherein: the lock body shell (1) is also provided with a signal feedback structure, and when the control circuit board (2) recognizes that the recognition chip contact (25) is not matched with the recognition contact (20), the signal feedback structure is started.