An automatic unlocking low-temperature storage cabinet and an unlocking method

Abstract

The present invention discloses an automatically unlocking low-temperature storage cabinet, which includes a cabinet body and an outer door; a handle is provided at the other movable end of the outer door; an electromagnetic lock is provided between the handle and the cabinet body, and the electromagnetic lock is adapted with an intelligent key; a controller and an infrared detector are provided on the handle; an RFID electronic chip is provided in the intelligent key, and an RFID reader is provided on the handle; the RFID electronic chip is communicatively connected to the RFID reader; the RFID reader is communicatively connected to the controller; the infrared detector is communicatively connected to the controller; the controller is connected to the electromagnetic lock to control the opening or closing of the electromagnetic lock. The present invention also discloses an unlocking method for the automatically unlocking low-temperature storage cabinet. Through the settings of the RFID electronic chip in the intelligent key, the RFID reader on the handle, and the infrared detector on the handle, the controller realizes the opening and closing of the electromagnetic lock through the combined action of RFID radio frequency technology and infrared detection technology, and no longer uses manual unlocking, with simple operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of low-temperature storage cabinets, and particularly relates to an automatically unlocking low-temperature storage cabinet and an unlocking method. Background Art

[0002] With the progress of technology, the improvement of living standards, and the development of the COVID-19 pandemic, people have higher and higher requirements for the quality of medicines and vaccines. Due to the positive effects of low temperature on reducing metabolism, anti-corrosion, and preservation, especially the increasing demand for ultra-low temperature, the development of the refrigeration equipment industry has been greatly accelerated, such as low-temperature cold storages and low-temperature storage cabinets.

[0003] In the prior art, a low-temperature storage cabinet generally has an outer door, and a door lock is arranged between the outer door and the cabinet body. Most of the existing door locks are manually unlocked, which is inconvenient to operate. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide an automatically unlocking low-temperature storage cabinet and an unlocking method.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An automatically unlocking low-temperature storage cabinet includes a cabinet body and an outer door; one end of the outer door is hinged to the cabinet body, and a handle is arranged at the other movable end of the outer door;

[0007] An electromagnetic lock is arranged between the handle and the cabinet body, and the electromagnetic lock is equipped with a smart key; a controller and an infrared detector for sensing the operator's hand are arranged on the handle;

[0008] An RFID electronic chip is arranged in the smart key, and an RFID reader is arranged on the handle;

[0009] The RFID electronic chip is communicatively connected to the RFID reader for transmitting identity recognition information;

[0010] The RFID reader is communicatively connected to the controller;

[0011] The infrared detector is communicatively connected to the controller;

[0012] The controller is connected to the electromagnetic lock to control the opening or closing of the electromagnetic lock.

[0013] Preferably, the electromagnetic lock includes a lock body and a lock catch. The lock body is fixedly arranged on the handle, and the lock catch is fixedly arranged on the cabinet body and corresponds to the lock body.

[0014] Preferably, the lock body includes a housing and a lock shaft located inside the housing;

[0015] The housing includes a main body in a cylindrical structure, a fixing plate located at one end of the main body, and a sealing plate located at the other end of the main body;

[0016] The fixing plate is provided with a guiding hole that penetrates into the interior of the main body and is used for sliding cooperation with the locking shaft;

[0017] The handle is provided with a mounting hole that cooperates with the outer wall surface of the main body, and the fixing plate is fixedly connected to the handle; the end of the locking shaft faces the lock catch;

[0018] The lock catch is provided with an insertion hole that cooperates with the protruding end of the locking shaft;

[0019] An electromagnetic component is arranged inside the main body, which can control the locking shaft to extend along the guiding hole to cooperate with the lock catch to achieve locking or control the locking shaft to retract along the guiding hole to achieve unlocking.

[0020] Preferably, the electromagnetic component includes a compression spring located inside the main body and surrounding the periphery of the locking shaft;

[0021] An annular spring pressing plate is arranged on the outer wall of the locking shaft located inside the main body;

[0022] An annular spring pressing block is arranged on the inner wall surface of the main body close to the sealing plate;

[0023] Both ends of the compression spring respectively abut against the end faces of the annular spring pressing plate and the annular spring pressing block;

[0024] A first annular electromagnet capable of attracting the locking shaft to retract inward is arranged on the inner end face of the sealing plate;

[0025] The inner diameter of the annular spring pressing block, the inner diameter of the first annular electromagnet, and the diameter of the locking shaft decrease in sequence;

[0026] The controller controls the energization and de-energization of the first annular electromagnet.

[0027] Preferably, a tension spring is connected to the end of the locking shaft facing the sealing plate, and the other end of the tension spring is connected to the inner end of the sealing plate.

[0028] Preferably, an annular plate is arranged radially outward on the end face of the annular spring pressing block facing the sealing plate;

[0029] A plurality of sliding blocks are arranged on the outer side wall of the annular plate in the circumferential direction, and a plurality of body chutes for axial sliding cooperation with the corresponding sliding blocks are arranged on the inner side wall of the main body;

[0030] A second annular electromagnet capable of urging the annular spring pressing block to press against the compression spring is arranged on the inner end face of the main body;

[0031] The controller controls the energization and de-energization of the second annular electromagnet.

[0032] Preferably, a locking tongue hole perpendicular to the locking shaft is formed in the upper side wall of the locking shaft, and a locking tongue is slidably fitted in the locking tongue hole along a direction perpendicular to the locking shaft;

[0033] A third annular electromagnet is arranged at the inner end of the locking tongue hole;

[0034] A locking compression spring is arranged between the inner end of the locking tongue hole and the inner end of the locking tongue;

[0035] After the outer end of the locking tongue extends out of the locking tongue hole, it can be locked by being clamped into the clamping groove of the first annular electromagnet;

[0036] The controller controls the energization and de-energization of the third annular electromagnet.

[0037] Preferably, a mechanical rotating shaft is rotatably connected to one end of the locking shaft facing the plugging plate;

[0038] A through hole for cooperating with the mechanical rotating shaft is formed in the plugging plate and penetrates through to the inside of the body;

[0039] A rotating shaft is coaxially and fixedly connected to the bottom of one end of the mechanical rotating shaft facing the locking shaft, and an eccentric cam is arranged at the end of the rotating shaft;

[0040] A rotating shaft hole for cooperating with the rotating shaft and penetrating through to the locking tongue hole is formed at the end of the locking shaft facing the mechanical rotating shaft;

[0041] An adjusting cavity for accommodating the eccentric cam is formed on the locking tongue;

[0042] A mechanical key hole is formed at the outer end of the mechanical rotating shaft, and a mechanical key end matching the mechanical key hole is arranged on the intelligent key;

[0043] When the mechanical key end is inserted into the mechanical key hole to drive the mechanical rotating shaft to rotate, the eccentric cam rotates accordingly to cause the locking tongue to perform a linear motion of extending or retracting.

[0044] Preferably, a locking tongue slider is arranged on the locking tongue;

[0045] A locking tongue sliding groove for slidingly fitting with the locking tongue slider in a direction perpendicular to the locking shaft is arranged in the locking tongue hole.

[0046] The present invention also provides an unlocking method for an automatically unlocking low-temperature storage cabinet.

[0047] An unlocking method for an automatically unlocking low-temperature storage cabinet includes the following steps:

[0048] S1: The user carries the smart key with him / her. When the distance between the smart key and the storage cabinet is between 0.1 m and 2 m, the RFID reader on the handle recognizes the RFID electronic chip on the smart key and sends a signal to the controller.

[0049] S2: When the user holds the handle, the infrared detector sends a signal to the controller.

[0050] S3: After the controller receives the signals sent by the RFID reader and the infrared detector, the controller controls the electromagnetic lock to unlock.

[0051] The beneficial effects of the present invention are:

[0052] (1) Through the settings of the RFID electronic chip in the smart key, the RFID reader on the handle, and the infrared detector on the handle, the present invention realizes the opening and closing of the electromagnetic lock by the controller through the combined action of RFID radio frequency technology and infrared detection technology, without using manual unlocking, and the operation is simple.

[0053] (2) Due to the structural settings of the electromagnetic lock in the present invention, mechanical opening and closing of the lock can be achieved when a failure occurs in the power system of the electromagnet, increasing the applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The schematic diagrams in the specification that form a part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application.

[0055] Figure 1 is the structural schematic diagram of the automatic unlocking low-temperature storage cabinet of the present invention;

[0056] Figure 2 is the structural schematic diagram of the handle in the present invention;

[0057] Figure 3 is the locking schematic diagram of the electromagnetic lock under normal circumstances of the power system in the present invention;

[0058] Figure 4 is Figure 3 the partial enlarged view of A in

[0059] Figure 5 is the unlocking schematic diagram of the electromagnetic lock under normal circumstances of the power system in the present invention;

[0060] Figure 6 is Figure 5 the partial enlarged view of B in

[0061] Figure 7 is the locking schematic diagram of the electromagnetic lock under the condition of power system failure in the present invention;

[0062] Figure 8 is Figure 7 A partially enlarged view of C in

[0063] Figure 9 is a schematic diagram of unlocking in the case of a power system failure of the electromagnetic lock in the present invention;

[0064] Figure 10 is Figure 9 A partially enlarged view of D in

[0065] Wherein:

[0066] 1 - cabinet body, 2 - outer door, 3 - handle;

[0067] 4 - electromagnetic lock, 41 - lock catch, 42 - housing, 421 - body, 422 - fixing plate, 423 - blocking plate, 424 - guiding hole, 425 - through hole, 426 - body chute, 43 - lock shaft, 431 - annular spring pressing plate, 44 - compression spring, 45 - annular spring pressing block, 451 - annular plate, 452 - slider, 46 - first annular electromagnet, 461 - card slot, 47 - tension spring, 48 - second annular electromagnet, 49 - lock tongue, 491 - lock tongue slider, 492 - lock tongue chute, 410 - third annular electromagnet, 411 - locking compression spring, 412 - mechanical rotating shaft, 413 - rotating shaft, 414 - eccentric cam, 415 - adjusting cavity, 416 - mechanical key hole;

[0068] 5 - infrared detector, 6 - intelligent key, 61 - mechanical key end, 7 - controller, 8 - display screen. Detailed implementation manners

[0069] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0070] It should be noted that the terms used herein are only for describing the specific implementation manners and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0071] In the present invention, terms such as "upper", "lower", "bottom", "top", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only relationship terms determined for the convenience of describing the structural relationship of each component or element of the present invention, and do not specifically refer to any component or element of the present invention, and should not be construed as a limitation to the present invention.

[0072] In the present invention, terms such as "connected" and "linked" should be understood in a broad sense, which may mean a fixed connection, an integral connection or a detachable connection; it may be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meanings of the above terms in the present invention can be determined according to specific circumstances, and it should not be construed as a limitation to the present invention.

[0073] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0074] Embodiment 1:

[0075] As Figure 1-2 shown, an automatic unlocking cryogenic storage cabinet includes a cabinet body 1 and an outer door 2; one end of the outer door 2 is hinged to the cabinet body, and a handle 3 is provided at the other movable end of the outer door 2;

[0076] An electromagnetic lock 4 is provided between the handle 3 and the cabinet body 1, and the electromagnetic lock 4 is equipped with a smart key 6; a controller 7 and an infrared detector 5 for sensing the operator's hand are provided on the handle 3;

[0077] An RFID electronic chip is provided in the smart key 6, and an RFID reader is provided on the handle 3;

[0078] The RFID electronic chip is communicatively connected to the RFID reader for transmitting identity recognition information; that is, the RFID electronic chip on the smart key 6 can be recognized by the RFID reader on the handle 3 within a certain distance range. After the RFID reader recognizes the identity recognition information of the RFID electronic chip, it will verify the obtained identity recognition information. After the verification is passed, the RFID reader will send a control signal to the controller 7;

[0079] The RFID reader is communicatively connected to the controller 7 for controlling the controller 7 to send a control signal according to the identity recognition information;

[0080] The infrared detector 5 is communicatively connected to the controller 7;

[0081] The controller 7 is connected to the electromagnetic lock 4 to control the opening or closing of the electromagnetic lock 4.

[0082] An electronic display screen 8 connected to the controller 7 is further provided on the outer door 2 for displaying the opening and closing information of the electromagnetic lock 4.

[0083] Preferably, as Figures 3-10 shown, the electromagnetic lock 4 includes a lock body and a lock catch 41. The lock body is fixedly provided on the handle 3, and the lock catch 41 is fixedly provided on the cabinet body 1 and corresponds to the lock body.

[0084] Preferably, the lock body includes a housing 42 and a lock shaft 43 located inside the housing 42;

[0085] The housing 42 includes a main body 421 in a cylindrical structure, a fixing plate 422 located at one end of the main body 421, and a sealing plate 423 located at the other end of the main body 4;

[0086] A guiding hole 424 that penetrates into the interior of the main body 421 and is used for sliding cooperation with the lock shaft 43 is provided on the fixing plate 422;

[0087] An installation hole that cooperates with the outer wall surface of the main body 421 is provided on the handle 3, and the fixing plate 422 is fixedly connected to the handle 3; the end of the lock shaft 43 faces the lock catch;

[0088] An insertion hole that cooperates with the extended end of the lock shaft 43 is provided on the lock catch 41;

[0089] An electromagnetic component that can control the lock shaft 43 to extend along the guiding hole to cooperate with the lock catch to achieve locking or control the lock shaft 43 to retract along the guiding hole to achieve unlocking is provided inside the main body 421.

[0090] Preferably, the electromagnetic component includes a compression spring 44 located inside the main body 421 and surrounding the periphery of the lock shaft 43;

[0091] An annular spring pressing plate 431 is provided on the outer wall of the lock shaft 43 located inside the main body 421;

[0092] An annular spring pressing block 45 is provided on the inner wall surface of the main body 421 close to the sealing plate 423;

[0093] Both ends of the compression spring 44 respectively abut against the end faces of the annular spring pressing plate 431 and the annular spring pressing block 45;

[0094] A first annular electromagnet 46 that can attract the lock shaft 43 to retract inward is provided on the inner end face of the sealing plate 423;

[0095] The inner diameter of the annular spring pressing block 45, the inner diameter of the first annular electromagnet 46, and the diameter of the lock shaft 43 decrease in sequence;

[0096] The controller 7 controls the energization and de-energization of the first annular electromagnet 46.

[0097] When the first annular electromagnet 46 is energized, it generates a magnetic force, thereby generating a force for the lock shaft 43 to retract, so that the lock shaft 43 retracts against the force of the compression spring 44.

[0098] Preferably, a tension spring 47 is connected to the end of the lock shaft 43 facing the plugging plate 423, and the other end of the tension spring 47 is connected to the inner end of the plugging plate 423.

[0099] As Figure 3 shown, when the electromagnetic lock is locked, the lock shaft 43 extends out. At this time, the compression spring 44 is compressed and the tension spring 47 is stretched; when unlocking is required, the first annular electromagnet 46 is powered on, and the acting force of the first annular electromagnet 46 on the lock shaft and the pulling force of the tension spring 47 jointly overcome the acting force of the compression spring 44, realizing the retraction of the lock shaft 43.

[0100] Preferably, an annular plate 451 is arranged radially outward on the end face of the annular spring pressing block 45 facing the plugging plate 423;

[0101] A plurality of sliding blocks 452 are arranged on the outer side wall of the annular plate 451 along the circumferential direction, and a plurality of body chutes 426 for axially sliding cooperation with the corresponding sliding blocks 452 are arranged on the inner side wall of the body 421;

[0102] A second annular electromagnet 48 capable of urging the annular spring pressing block 45 to press against the compression spring 44 is arranged on the inner end face of the body 421;

[0103] The controller 7 controls the power on and off of the second annular electromagnet 48.

[0104] During use, when the power system of the electromagnetic lock of the present application does not fail, the second annular electromagnet 48 in the present application is always in the powered-on state. Therefore, whether unlocking or locking, the second annular electromagnet 48 always attracts the annular spring pressing block 45 to press against the compression spring 44.

[0105] Preferably, a lock tongue hole perpendicular to the lock shaft 43 is formed on the upper side wall of the lock shaft 43, and a lock tongue 49 is slidably fitted in the lock tongue hole along a direction perpendicular to the lock shaft 43;

[0106] A third annular electromagnet 410 is arranged at the inner end of the lock tongue hole;

[0107] A locking compression spring 411 is arranged between the inner end of the lock tongue hole and the inner end of the lock tongue 49; wherein the locking compression spring 411 is located inside the third annular electromagnet 410;

[0108] After the outer end of the lock tongue 49 extends out of the lock tongue hole, it can be locked by being caught in the card slot 461 of the first annular electromagnet 46;

[0109] The controller 7 controls the power on and off of the third annular electromagnet 410.

[0110] Preferably, a mechanical rotating shaft 412 is rotatably connected to one end of the lock shaft 43 facing the plugging plate 423; the mechanical rotating shaft 412 is located inside the tension spring 47; specifically, the mechanical rotating shaft 412 is coaxially rotatably connected to the lock shaft 43 through a bearing;

[0111] A through hole 425 that penetrates into the interior of the main body 421 and is used to cooperate with the mechanical rotating shaft 412 is provided on the plugging plate 423;

[0112] One end bottom of the mechanical rotating shaft 412 facing the lock shaft 43 is coaxially fixedly connected with a rotating shaft 413, and an eccentric cam 414 is provided at the end of the rotating shaft 413;

[0113] A rotating shaft hole that is used to cooperate with the rotating shaft 413 and penetrates into the lock tongue hole is provided at the end of the lock shaft 43 facing the mechanical rotating shaft 412;

[0114] An adjusting cavity 415 for accommodating the eccentric cam 414 is provided on the lock tongue 49; during the rotation of the eccentric cam 414, under the action of the locking compression spring 411, the outer end face of the eccentric cam 414 can press on the corresponding side face of the adjusting cavity 415, so as to realize the linear motion of the lock tongue 49;

[0115] A mechanical key hole 416 is provided at the outer end of the mechanical rotating shaft 412, and a mechanical key end 61 that matches the mechanical key hole 416 is provided on the intelligent key 6;

[0116] When the mechanical key end 61 is inserted into the mechanical key hole 416 and drives the mechanical rotating shaft 412 to rotate, the eccentric cam 414 rotates accordingly to cause the lock tongue 49 to perform a linear motion of extending or retracting.

[0117] Preferably, a lock tongue slider 491 is provided on the lock tongue 49;

[0118] A lock tongue sliding groove 492 that is slidably matched with the lock tongue slider 491 in a direction perpendicular to the lock shaft is provided in the lock tongue hole.

[0119] For the automatic unlocking low-temperature storage cabinet in Embodiment 1, the states of the electromagnetic lock 4 when unlocking and locking are as follows:

[0120] When the power system of the electromagnet 4 is normal, the structure when locking is as Figures 3-4 shown: At this time, the lock shaft 43 extends and is stuck into the insertion hole of the lock catch 41; the third annular electromagnet 410 is powered off and does not generate magnetic force, the lock tongue 49 extends and is stuck into the card slot 461, and at this time, the outer end face of the short axis end of the eccentric cam 414 is in contact with the side face in the adjusting cavity 415 close to the locking compression spring 411; the second annular electromagnet 48 is powered on to cause the annular spring pressing block 45 to press the compression spring 44; the first annular electromagnet 46 is powered off and does not generate magnetic force.

[0121] When the power system of the electromagnet 4 is normal, when unlocking from the Figure 3 locked state of the state:

[0122] First, the third annular electromagnet 410 is energized to generate magnetic force, thereby generating an attractive force on the locking tongue 49, causing the locking tongue 49 to retract against the elastic force of the locking compression spring 411 until it exits from the card slot 461. At this time, the outer end surface of the long axis end of the eccentric cam 414 contacts the side surface in the adjustment cavity 415 away from the locking compression spring 411;

[0123] Subsequently, the first annular electromagnet 46 is energized. The attractive force of the first annular electromagnet 46 on the locking shaft and the pulling force of the tension spring 47 jointly overcome the acting force of the compression spring 44, realizing the retraction of the locking shaft 43 from the insertion hole of the lock catch 41, achieving unlocking. The structure after unlocking is as Figure 5 shown;

[0124] During the above unlocking process, the second annular electromagnet 48 is always energized, prompting the annular spring pressing block 45 to tightly press the compression spring 44.

[0125] When the power system of the electromagnet 4 is normal, the structure after unlocking is as Figures 5-6 shown, when locking from the Figure 5 unlocked state of the state:

[0126] First, the first annular electromagnet 46 is de-energized, and the acting force of the compression spring 44 overcomes the pulling force of the tension spring 47, realizing the extension of the locking shaft 43 and inserting it into the insertion hole of the lock catch 41;

[0127] Then the third annular electromagnet 410 is de-energized, causing the locking tongue 49 to extend under the elastic force of the locking compression spring 411 and snap into the card slot 461, achieving locking. The structure after locking is as Figure 3 shown.

[0128] When a fault occurs in the power system of the electromagnet 4, it means that the first annular electromagnet 46, the second annular electromagnet 48, and the third annular electromagnet 410 cannot be energized.

[0129] When a fault occurs in the power system of the electromagnet 4, the structure during locking is as Figures 7-8 shown: At this time, the locking shaft 43 extends and snaps into the insertion hole of the lock catch 41; the third annular electromagnet 410 cannot be energized and does not generate magnetic force, the locking tongue 49 extends and snaps into the card slot 461. At this time, the outer end surface of the short axis end of the eccentric cam 414 contacts the side surface in the adjustment cavity 415 close to the locking compression spring 411; the second annular electromagnet 48 cannot be energized, the second annular electromagnet 48 no longer generates magnetic force, and the annular spring pressing block 45 slides along the main body chute 426 under the action of the compression spring 44, so that the compression spring 44 is in a natural elongation state; the first annular electromagnet 46 cannot be energized and does not generate magnetic force.

[0130] When a fault occurs in the power system of the electromagnet 4, from Figure 7 the locked state of the state to unlock:

[0131] When the mechanical key end 61 is inserted into the mechanical key hole 416 to drive the mechanical rotating shaft 412 to rotate, the eccentric cam 414 rotates accordingly, causing the locking tongue 49 to retract against the elastic force of the locking compression spring 411 until it withdraws from the card slot 461;

[0132] Since the compression spring 44 is in the natural elongation state and no longer generates a force at this time, when the locking tongue 49 withdraws from the card slot 461, the locking shaft 43 retracts by itself under the action of the tension spring 47 and withdraws from the insertion hole of the lock catch 41, thus realizing mechanical unlocking. The structure after mechanical unlocking is as Figures 9-10 shown.

[0133] When a fault occurs in the power system of the electromagnet 4, from Figure 9 the unlocked state of the state to lock:

[0134] Insert the mechanical key end 61 into the mechanical key hole 416, then manually press down the mechanical rotating shaft 412 to make the locking shaft 43 extend and insert into the insertion hole of the lock catch 41. At this time, the locking tongue 49 is facing the card slot 461; then rotate the mechanical key end 61 to drive the eccentric cam 414 to rotate to realize the locking tongue 49 extending and snapping into the card slot 461, thus realizing locking. The structure after mechanical locking is as Figure 7 shown.

[0135] Embodiment 2:

[0136] An unlocking method for an automatically unlocking low-temperature storage cabinet in Embodiment 1 includes the following steps:

[0137] S1: The user carries the smart key 6 with him / her. When the distance between the smart key 6 and the storage cabinet is between 0.1 m and 2 m, the RFID reader on the handle 3 identifies the RFID electronic chip on the smart key 6 and sends a signal to the controller 7;

[0138] S2: When the user holds the handle 3, the infrared detector 5 sends a signal to the controller 7;

[0139] S3: When the controller receives the signals sent by the RFID reader and the infrared detector 5, the controller 7 controls the electromagnetic lock 4 to unlock.

[0140] Although the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, it is not a limitation to the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the present invention.

Claims

1. An automatic unlocking low-temperature storage cabinet, comprising a cabinet body and an outer door; one end of the outer door is hinged to the cabinet body, and a handle is provided at the other movable end of the outer door; characterized in that, an electromagnetic lock is provided between the handle and the cabinet body, and the electromagnetic lock is equipped with a smart key; a controller and an infrared detector for sensing the operator's hand are provided on the handle; an RFID electronic chip is provided in the smart key, and an RFID reader is provided on the handle; the RFID electronic chip is communicatively connected to the RFID reader for transmitting identity recognition information; the RFID reader is communicatively connected to the controller; the infrared detector is communicatively connected to the controller; the controller is connected to the electromagnetic lock to control the opening or closing of the electromagnetic lock; the electromagnetic lock includes a lock body and a lock catch, the lock body includes a housing and a lock shaft located inside the housing, the housing includes a cylindrical main body, a fixing plate at one end of the main body, and a sealing plate at the other end of the main body, and an insertion hole matching the protruding end of the lock shaft is provided on the lock catch; an electromagnetic component capable of controlling the lock shaft to extend and cooperate with the lock catch to lock or controlling the lock shaft to retract to unlock is provided inside the main body; the electromagnetic component includes a compression spring located inside the main body and surrounding the periphery of the lock shaft, and both ends of the compression spring respectively abut against the end faces of an annular spring pressing plate and an annular spring pressing block; a first annular electromagnet capable of attracting the lock shaft to retract inward is provided on the inner end face of the sealing plate; a tension spring is connected to the end of the lock shaft facing the sealing plate; a second annular electromagnet capable of urging the annular spring pressing block to press against the compression spring is provided on the inner end face of the main body; a lock tongue hole perpendicular to the lock shaft is provided on the upper side wall of the lock shaft, and a lock tongue is slidably fitted in the lock tongue hole along a direction perpendicular to the lock shaft; a third annular electromagnet is provided at the inner end of the lock tongue hole; a lock stop compression spring is provided between the inner end of the lock tongue hole and the inner end of the lock tongue; the outer end of the lock tongue can be inserted into the card slot of the first annular electromagnet to achieve locking after protruding from the lock tongue hole; the controller controls the energization and de-energization of the first annular electromagnet, the second annular electromagnet, and the third annular electromagnet; a mechanical rotating shaft is rotatably connected to one end of the lock shaft facing the sealing plate; a through hole for cooperating with the mechanical rotating shaft is provided on the sealing plate and penetrates through to the inside of the main body; a rotating shaft is coaxially and fixedly connected to the bottom of one end of the mechanical rotating shaft facing the lock shaft, and an eccentric cam is provided at the end of the rotating shaft; a rotating shaft hole for cooperating with the rotating shaft and penetrating through to the lock tongue hole is provided at the end of the lock shaft facing the mechanical rotating shaft; an adjusting cavity for accommodating the eccentric cam is provided on the lock tongue; a mechanical key hole is provided at the outer end of the mechanical rotating shaft, and a mechanical key end matching the mechanical key hole is provided on the smart key; when the mechanical key end is inserted into the mechanical key hole to drive the mechanical rotating shaft to rotate, the eccentric cam rotates accordingly to cause the lock tongue to perform a linear motion of extending or retracting.

2. The automatic unlocking low-temperature storage cabinet according to claim 1, characterized in that, the lock body is fixedly provided on the handle, and the lock catch is fixedly provided on the cabinet body and corresponds to the lock body.

3. The automatic unlocking low-temperature storage cabinet according to claim 2, wherein The fixed plate is provided with a guiding hole that penetrates into the interior of the body and is used for sliding cooperation with the locking shaft; The handle is provided with a mounting hole that cooperates with the outer wall surface of the body, and the fixed plate is fixedly connected to the handle; the end of the locking shaft faces the lock catch.

4. The automatic unlocking cryogenic storage cabinet according to claim 3, wherein An annular spring pressing plate is arranged on the outer wall of the locking shaft located inside the body; an annular spring pressing block is arranged on the inner wall surface of the body close to the plugging plate; The inner diameter of the annular spring pressing block, the inner diameter of the first annular electromagnet, and the diameter of the locking shaft decrease in sequence.

5. The automatic unlocking cryogenic storage cabinet according to claim 4, wherein The other end of the tension spring is connected to the inner end of the plugging plate.

6. The automatic unlocking low-temperature storage cabinet according to claim 5, characterized in that, An annular plate is arranged radially outward on the end surface of the annular spring pressing block facing the plugging plate; A plurality of sliding blocks are arranged on the outer side wall of the annular plate in the circumferential direction, and a plurality of body chutes for axial sliding cooperation with the corresponding sliding blocks are arranged on the inner side wall of the body.

7. The automatic unlocking low-temperature storage cabinet according to claim 1, characterized in that The locking tongue is provided with a locking tongue sliding block; A locking tongue chute for sliding cooperation perpendicular to the direction of the locking shaft with the locking tongue sliding block is arranged in the locking tongue hole.

8. An unlocking method for an automatically unlocking low-temperature storage cabinet according to any one of claims 1 to 7, characterized in that, It includes the following steps: S1: The user carries the smart key with them. When the distance between the smart key and the storage cabinet is between 0.1 m and 2 m, the RFID reader on the handle recognizes the RFID electronic chip on the smart key and transmits a signal to the controller; S2: When the user holds the handle with their hand, the infrared detector transmits a signal to the controller; S3: When the controller receives the signals transmitted by the RFID reader and the infrared detector, the controller controls the electromagnetic lock to unlock.

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