CN210858273U - Lock with state detection function and lock control system - Google Patents

Abstract

Take tool to lock and lock accuse system of state detection function, this tool to lock includes: the lock comprises a lock shell and a lock lug, wherein an unlocking component and a lock cylinder are arranged in the lock shell, and the unlocking component comprises a lock rod which is matched with the lock lug to realize locking; the lock state detection device comprises a lock state detection unit and a detection circuit, wherein the lock state detection unit is used for detecting the position state of the lock rod, and the detection circuit is electrically connected with the lock state detection unit; the detection circuit is in communication connection with a computer key matched with the lock for use, and the lock state detection unit detects state change information of the lock rod and sends the state change information to the computer key through the detection circuit. The utility model discloses set up the sensing element that detects the locking lever position in the tool to lock and can pass through the computer key feedback with the state information of the tool to lock that sensing element detected with computer key communication connection's detection circuitry and give the remote management terminal, make things convenient for the managers in time to know the state of tool to lock, be convenient for manage and control facility equipment.

Description

Lock with state detection function and lock control system

Technical Field

The utility model relates to a tool to lock especially relates to a be applied to tool to lock and lock control system in electric power mistake field of preventing.

Background

A large number of net doors and cabinet doors exist in a transformer substation and an urban power distribution network, and in order to guarantee equipment and production safety and prevent irrelevant personnel or lawless persons from randomly operating or stealing and damaging the equipment, the net doors/cabinet doors are provided with locks for locking the net doors/cabinet doors. The existing lock generally uses a special computer (intelligent) key, and the unlocking operation can be carried out only under the condition that the computer key is authorized by a background management system. In the actual use process, sometimes, the situation that an operator forgets to close the door or forgets to close the door due to negligence after completing the equipment operation occurs, so that a leak exists in safety management, and an irrelevant person may enter a space isolated by a net door/a cabinet door, thereby easily causing a safety accident. Because the existing net door/cabinet door lock only provides a single locking function, and a computer key only has the function of unlocking under the authorized condition, the state of the lock cannot be detected and fed back, a remote management terminal lacks an effective means for confirming the state of the door lock, once a safety accident occurs, accident responsibility cannot be distinguished, and potential safety hazards of equipment property loss or damage can be brought.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tool to lock and high lock accuse system of security with state detection function.

In order to achieve the above object, the present invention adopts the following technical solutions:

lock with state detection function, comprising: the lock comprises a lock shell and a lock lug, wherein an unlocking component and a lock cylinder are arranged in the lock shell, and the unlocking component comprises a lock rod which is matched with the lock lug to realize locking; the lock state detection device comprises a lock state detection unit and a detection circuit, wherein the lock state detection unit is used for detecting the position state of the lock rod, and the detection circuit is electrically connected with the lock state detection unit; the detection circuit is in communication connection with a computer key matched with the lock for use, and the lock state detection unit detects state change information of the lock rod and sends the state change information to the computer key through the detection circuit.

According to the above technical scheme, the utility model discloses set up the state detection component that can detect the locking lever position in the tool to lock to be provided with can with computer key communication connection's detection circuitry, detection circuitry can give the computer key with locking lever position state information transmission that state detection component detected, and through computer key feedback remote management terminal, make things convenient for the managers in time to know the state of tool to lock, be convenient for manage and monitor facility equipment.

More specifically, the unlocking and locking assembly further comprises an unlocking and locking limiting rod which limits the lock rod at an unlocking position or a locking position, and a limiting rod resetting piece which enables the unlocking and locking limiting rod to reset; two ends of the lock rod penetrate through two opposite side walls of the lock shell and are exposed out of the lock shell, the lock rod can move between an unlocking position and a locking position under the action of external force, and a first limiting matching part and a second limiting matching part are arranged on the lock rod; the unlocking and locking limiting rod is provided with a buckling part which can be matched with the first limiting matching part or the second limiting matching part, the unlocking and locking limiting rod is driven by a lock cylinder arranged in the lock shell and can be separated from or close to the lock rod under the drive of the lock cylinder or a limiting rod reset piece, so that the buckling part is matched with or separated from the first limiting matching part or the second limiting matching part.

More specifically, the lock core is connected with a linkage rod, the linkage rod is provided with a matching part which is movably matched with the unlocking limiting rod, and the linkage rod drives the unlocking limiting rod to be far away from the lock rod when rotating along with the lock core.

Preferably, an unlocking limiting element is arranged between the lock rod and the lock shell and limits the pulling-out position of the lock rod after unlocking.

Further, the detection circuit includes: the state feedback module comprises at least one state feedback loop, the state feedback loop comprises a feedback element and a control switch connected with the feedback element, and the control switch is provided with a control end for controlling the control switch to be switched on or off; the lock state detection unit controls the on-off of the feedback loop control circuit according to the detected lock state; the receiving and transmitting antenna is connected with the state feedback element and is in communication connection with a computer key; and the power supply module supplies power to the state feedback module and the feedback loop control circuit.

And the expensive logic controller is replaced by the simple switching circuit and the control circuit, so that the cost can be effectively reduced.

Preferably, the state detection assembly further comprises a door state detection unit for detecting the opening/closing state of the door, the door state detection unit is electrically connected with the detection circuit, and the door state detection unit detects the state change information of the door and sends the state change information to the computer key through the detection circuit; the lock state detection unit and the door state detection unit are respectively connected to different feedback loop control circuits in the detection circuit, and the lock state detection unit and the door state detection unit respectively control the on-off of the feedback loop control circuit in which the lock state detection unit and the door state detection unit are respectively located according to the detected lock state and the detected door state.

Through setting up a door state detection unit, can also gather the open/close status information of door simultaneously, make managers can know equipment site information more comprehensively, guarantee power production and equipment safety.

More specifically, the state feedback module includes a first state feedback loop, a second state feedback loop and a third state feedback loop, the feedback loop control circuit includes a first feedback loop control circuit, a second feedback loop control circuit and a third feedback loop control circuit respectively connected to the first state feedback loop, the second state feedback loop and the third state feedback loop, the lock state detection unit is connected to the second feedback loop control circuit, and the door state detection unit is connected to the third feedback loop control circuit; the control end of the control switch of the first state feedback loop is connected with a first grounding loop, the first grounding loop comprises a first grounding switch, the control end of the first grounding switch is connected with the output end of the second feedback loop control circuit, and the first grounding loop is conducted when the second feedback loop control circuit is conducted; the control end of the control switch of the second state feedback loop is connected with a second grounding loop, the second grounding loop comprises a second grounding switch, the control end of the second grounding switch is connected with the output end of the third feedback loop control circuit, and the second grounding loop is conducted when the third feedback loop control circuit is conducted.

More specifically, the feedback element is an RFID chip, the control switch is an NMOS transistor, a gate of the NMOS transistor is a control end of the control switch, a drain of the NMOS transistor is connected to a ground end of the RFID chip, and a source of the NMOS transistor is grounded.

More specifically, the first grounding switch and/or the second grounding switch is an NMOS tube, the gate of the NMOS tube is the control end of the grounding switch, the drain of the NMOS tube is connected to the control end of the control switch of the state feedback loop connected to the grounding loop where the NMOS tube is located, and the source of the NMOS tube is grounded.

The detection circuit is formed by conventional electronic components such as an RFID chip, an NMOS tube and the like, so that the product is good in universality and easy to purchase, and the cost is reduced.

Preferably, the receiving and transmitting antenna is an induction antenna of an identification code chip of the lockset.

More specifically, the detection circuit further comprises a rectifying circuit, the transceiver antenna and the rectifying circuit are connected to form a power module, and the transceiver antenna receives the electric energy of the computer key and supplies power to the state feedback module and the feedback loop control circuit after being rectified by the rectifying circuit.

The antenna of the identity identification code chip of the lockset is used as an induction antenna, so that the number of parts in the lock shell is prevented from being increased, and the structure is favorably simplified. In a further scheme, a power supply module is formed by the rectifying circuit and the induction antenna, a power supply element is not additionally arranged, and the power consumption requirement of the lock power consumption part can be guaranteed.

More specifically, the detection circuit is arranged on a PCB board positioned in the lock shell.

The detection circuit and other components are arranged in the lock shell together, so that the lock is more compact in structure.

More specifically, tool to lock state detection unit including set up in the magnet of locking lever with set up correspondingly in the tongue tube in the lock shell, the tongue tube with detection circuit electricity is connected.

More specifically, the door state detection unit comprises a reed switch arranged in the lock shell and a magnet correspondingly arranged on the door frame, and the reed switch is electrically connected with the detection circuit.

The reed switch and the magnet are adopted to form the state detection unit, and the device has the advantages of simple structure, low cost and easy realization.

The utility model also provides a lock control system, include: the lock comprises a lock body, a computer key and a management terminal, wherein the lock body is the lock with the state detection function, the computer key is in communication connection with the management terminal, and the computer key is provided with a state acquisition device for acquiring the state of the lock body.

Through set up the sensor determine module who detects tool to lock state (locking lever position) on the tool to lock, set up simultaneously can with computer key communication connection's detection circuitry, operating personnel is when carrying out the unblock operation to the tool to lock, the state of tool to lock all can be gathered and give the remote management terminal through computer key through state detecting element, make managers can in time know the state information of tool to lock, in the preferred scheme, can further set up a state detecting element, gather the state information of door simultaneously, can in time handle when the abnormal shutting of appearance closes the door, realize facility equipment's safety control.

Drawings

In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is an exploded schematic view of an embodiment of the present invention;

FIG. 3 is an exploded view of the unlocking assembly of the present invention;

fig. 4a to 4d are schematic position diagrams of an unlocking limit rod and a lock rod in the unlocking process respectively;

fig. 5 is an exploded schematic view of a detection assembly according to an embodiment of the present invention;

fig. 6 is a schematic view of another angle of the detecting assembly according to the embodiment of the present invention;

FIG. 7 is a schematic view of the interior of the lock in the locked condition;

FIG. 8a is a cross-sectional view taken along line A-A of FIG. 7;

FIG. 8B is a cross-sectional view taken along line B-B of FIG. 7;

fig. 9 is a circuit diagram of a detection circuit according to an embodiment of the present invention;

fig. 10 is a circuit diagram of another embodiment of the detection circuit of the present invention;

fig. 11 is a block diagram of a lock control system according to an embodiment of the present invention.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Detailed Description

In order to make the above and other objects, features and advantages of the present invention more apparent, the following embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the lock of the present embodiment includes a lock case 1, a lock lug 2, a lock cylinder (not shown), an unlocking component 4 and a state detection component 5, wherein the lock cylinder, the unlocking component 4 and the state detection component 5 are all disposed in the lock case 1, and the lock case 1 is closed by a lock case cover plate 6. The lock shell 1 and the lock lug 2 are respectively and correspondingly installed on a door and a door frame, the lock shell 1 is fixed on the door through the auxiliary installation plate 7 (the auxiliary installation plate 7 is installed on the back face of the door) in the embodiment, the lock lug 2 is fixed on the door frame through the fixed seat 2a, the lock lug and the lock shell correspond in position, in other embodiments, when the position space is proper, the installation positions of the lock lug and the lock shell can be exchanged, namely the lock lug is installed on the door, and the lock shell is correspondingly installed on the door frame. A code chip mounting groove 1a is provided in the front surface of the lock case 1, the code chip mounting groove 1a is also a lock cylinder mounting groove, and a lock cylinder code chip 3 and a lock cylinder (not shown) are provided in the code chip mounting groove 1 a. The lock core code piece has the function of lock identity identification, for example, a radio frequency code piece which is commonly used in the prior art and stores lock identity ID codes is provided with a unique identification code, and when the management terminal issues unlocking rights corresponding to the identification code, the lock core corresponding to the identification code can be unlocked through a computer key. The lock shell 1 is also provided with a dustproof cover 8 capable of covering the lock core pieces 3, after the dustproof cover 8 is opened, a computer key is inserted, and the unlocking or locking operation is carried out by rotating the computer key.

Referring to fig. 3, the unlocking assembly 4 includes a lock rod 4-1, an unlocking limit rod 4-2 and a limit rod return spring 4-3. Two ends of the lock rod 4-1 penetrate through two opposite side walls of the lock shell 1 and are exposed out of the lock shell 1, and the lock rod 4-1 can move along the axial direction of the lock rod 4-1. One end of the lock rod 4-1 can penetrate through the lock lug 2 and is matched with the lock lug 2 to realize locking. For convenience of description, one end of the lock bar 4-1 that can penetrate into the lock lug 2 is defined as a tail portion, and the other end of the lock bar 4-1 is defined as a head portion. In order to facilitate the unlocking operation of an operator, in the embodiment, a cylindrical operation holding part 4-4 with an outer diameter larger than that of the lock rod 4-1 is arranged at the head part of the lock rod 4-1, the operation holding part 4-4 of the embodiment is connected with the lock rod 4-1 through a connecting pin 4-5, and the operator can grasp the operation holding part 4-4 when pushing and pulling the lock rod 4-1. The operating grip 4-4 can also be connected with the locking rod 4-1 in a threaded manner or connected with the locking rod 4-1 through a threaded connecting piece.

The locking rod 4-1 is provided with a first limit matching part 4-1a and a second limit matching part 4-1b which can be matched with the unlocking limiting rod 4-2, and the first limit matching part 4-1a and the second limit matching part 4-1b of the embodiment are both grooves arranged on the outer wall of the locking rod 4-1. The unlocking and locking limiting rod 4-2 is provided with a buckling part 4-2a matched with the lock rod 4-1, in a locking state, the buckling part 4-2a of the unlocking and locking limiting rod 4-2 is matched with the first limiting matching part 4-1a, namely, the buckling part 4-2a of the unlocking and locking limiting rod 4-2 extends into a groove serving as the first limiting matching part 4-1a to lock and limit the lock rod 4-1, so that the lock rod 4-1 is positioned at a locking position and cannot move; after unlocking, the lock rod 4-1 is pulled outwards to be moved out of the lock lug 2 and located at the unlocking position, the buckling part 4-2a of the unlocking limiting rod 4-2 extends into the groove serving as the second limiting matching part 4-2a, the lock rod 4-1 is unlocked and limited, and the lock rod 4-1 is located at the unlocking position and cannot move.

The limiting rod reset spring 4-3 is abutted against the unlocking limiting rod 4-2 (the other end of the limiting rod reset spring is abutted against the inner wall of the lock shell or other parts in the lock shell), so that a force for enabling the buckling part on the unlocking limiting rod 4-2 to move towards the direction close to the limiting matching part on the lock rod 4-1 is provided for the unlocking limiting rod 4-2, namely the unlocking limiting rod 4-2 always has a tendency close to the lock rod 4-1. The reset spring of the limiting rod can also be replaced by other mechanisms, such as a motor and the like, and the elastic element is adopted to reset the unlocking limiting rod, so that the structure is simple, the realization is easy and the cost is low. The unlocking and locking limiting rod 4-2 can move along the self axial direction under the elastic force action of the limiting rod return spring 4-3 and the rotation action of the lock cylinder (key), thereby being close to or far away from the lock rod 4-1. The lock core of the embodiment is connected with the unlocking limiting rod 4-2 through a linkage rod 9 to realize transmission, the lock core is connected with the linkage rod 9 and can drive the linkage rod 9 to rotate together, and the linkage rod 9 converts the circular motion of the lock core during rotation into the axial motion of the unlocking limiting rod 4-2. In the embodiment, the assembling groove 4-2b matched with the interlocking rod 9 is processed on the unlocking limiting rod 4-2, the matching part 9a is arranged at the end part of the interlocking rod 9 matched with the unlocking limiting rod 4-2, the matching part 9a of the embodiment is semi-cylindrical, the matching part 9a extends into the assembling groove 4-2b of the unlocking limiting rod 4-2, when the interlocking rod 9 rotates along with the lock core, different side surfaces of the semi-cylindrical matching part 9a are contacted (movably matched) with the top wall of the assembling groove 4-2b of the unlocking limiting rod 4-2, so that the unlocking limiting rod 4-2 can be jacked up or a falling space is provided for the unlocking limiting rod 4-2, and the circumferential motion of the interlocking rod 9 is converted into the axial motion of the unlocking limiting rod 4-2. The matching part 9a can also be in other polygonal prism shapes, can also adopt a cam structure or be in a convex form arranged on the peripheral wall of the interlocking rod, and can realize that the unlocking limiting rod contacted with the matching part moves axially in the rotating process along with the lock core. In addition, under the condition that the position space in the lock shell is proper, the matching part can also be directly arranged at the end part of the lock core without transmission through a linkage rod.

In order to prevent the lock rod 4-1 from being pulled out after being unlocked, an unlocking limiting element can be arranged between the lock rod 4-1 and the lock shell 1, the unlocking limiting element of the embodiment comprises an unlocking limiting groove 4-1c arranged on the lock rod 4-1 and an unlocking limiting pin 10 fixed with the lock shell 1, one end of the unlocking limiting pin 10 is fixed with the lock shell 1, the other end of the unlocking limiting pin 10 extends into the limiting groove 4-1c, the lock rod 4-1 can move within the length range of the unlocking limiting groove 4-1c, and when the lock rod 4-1 moves until the end wall of the unlocking limiting groove 4-1c abuts against the unlocking limiting pin 10, the lock rod 4-1 stops moving. The unlocking limit pin can also be in the form of a convex part fixed in the lock shell, and the positions of the unlocking limit groove and the unlocking limit pin can also be interchanged, for example, the convex part or the limit pin is arranged on the lock rod, and the part which is arranged at the proper position of the lock shell and is abutted against the convex part or the limit pin can also realize the limit of the lock rod.

Fig. 4a is a schematic position diagram of the unlocking limiting rod 4-2 and the lock rod 4-1 in the locking state, as shown in fig. 4a, when locking, the buckling part 4-2a of the unlocking limiting rod 4-2 is located in the first limit matching part 4-1a, and the lock rod 4-1 is limited by the unlocking limiting rod 4-2 and cannot move. When the computer key is used for unlocking, the computer key is rotated to drive the lock cylinder to rotate, the lock cylinder further drives the linkage rod 9 to rotate, the matching part 9a of the linkage rod 9 can jack the unlocking limiting rod 4-2 in the unlocking and rotating process, so that the unlocking limiting rod can overcome the elasticity of the limiting rod reset spring 4-3 to leave the first limiting matching part 4-1a, and when the unlocking limiting rod 4-2 leaves the first limiting matching part 4-1a (figure 4b), the lock rod 4-1 can be pulled outwards to leave the lock lug, so that unlocking is realized. When unlocking is completed, the unlocking limiting rod 4-2a is located at the position of the second limiting matching part 4-1b but is not matched with the second limiting matching part 4-1b (fig. 4c), after the lock core is reversely rotated and reset by a computer key, the matching part 9a of the linkage rod 9 is also rotated and reset, the unlocking limiting rod 4-2 is not jacked up any more, the unlocking limiting rod 4-2 is reset under the action of the limiting rod reset spring 4-3 and falls into the second limiting matching part 4-1b (fig. 4d), the unlocked lock rod 4-1 is limited, and the lock rod 4-1 cannot axially move. The action process during locking is opposite to that during unlocking, an operator rotates the computer key, the lock cylinder is rotated to drive the unlocking limiting rod 4-2 to move away from the second limiting matching part 4-1b through the linkage rod 9, then the lock rod 4-1 is pushed towards the direction close to the lock lug 2, the tail part of the lock rod 4-1 extends into the lock lug 2, then the computer key is rotated to reset, the computer key is pulled out, the unlocking limiting rod 4-2 extends into the first limiting matching part 4-1b under the action of the limiting rod reset spring 4-3 at the moment, the locking limiting is carried out on the lock rod 4-1, and locking is completed.

As shown in fig. 5 and 6, the state detecting assembly 5 of the present embodiment includes a mounting seat 5-1, a latch lever state detection sensing element 5-2 (fig. 8b) and a PCB board 5-3, and preferably, further includes a door state detection sensing element 5-4 (fig. 8 a). The locking rod state detection sensing element 5-2 of the present embodiment comprises a first magnet 5-2a disposed on the locking rod 4-1 and a first dry reed pipe 5-2b disposed on the mounting seat 5-1 (inside the lock housing), and the door state detection sensing element 5-4 comprises a second magnet 5-4a disposed on the door frame (the fixing seat 2a) and a second dry reed pipe 5-4b disposed on the mounting seat 5-1 (inside the housing). The first magnet 5-2a and the first reed switch 5-2b are correspondingly arranged to detect the position state of the lock rod; the second magnet 5-4a and the second reed switch 5-4b are arranged correspondingly to detect the open/close state of the door. When the reed switch is close to the magnet, magnetic induction is generated, so that the reed switch is conducted; when the reed switch is far away from the magnet, magnetic induction cannot be generated, and the reed switch is not conducted. The first reed switch and the second reed switch are respectively and electrically connected with a detection circuit on the PCB 5-3 through leads, and the detection circuit is also electrically connected with the lock core chip 3 through leads. Under the condition that the internal space structure of the lock shell is proper, the reed switch and the PCB can be directly installed in the lock shell without being installed through the installation seat.

Fig. 7 is a schematic structural diagram of the inside of the lock when the lock is locked, and the lock case is omitted in fig. 7 for convenience of internal structural display. Fig. 8a and 8B are cross-sectional views taken along line a-a and line B-B of fig. 7, respectively. As shown in fig. 7, 8a and 8b, when the magnetic lock is closed, the first magnet 5-2a is close to the first reed switch 5-2b, the second magnet 5-4a is close to the second reed switch 5-4b to generate magnetic induction, and the first reed switch 5-2b and the second reed switch 5-4b are respectively conducted; on the contrary, when the magnetic lock is closed, the first magnet 5-2a and the first reed pipe 5-2b are far away from each other, the second magnet 5-4a and the second reed pipe 5-4b are far away from each other, no magnetic induction is generated between the first magnet 5-2a and the second reed pipe 5-4b, and the first reed pipe 5-2b and the second reed pipe 5-4b are not conducted. The reed switch and the magnet are adopted to form a state detection sensing element, and the device has the advantages of simple structure, low cost and easy realization.

The detection circuit on the PCB is respectively electrically connected with a reed switch and a lock cylinder code sheet in the lock rod state detection sensing element and the door state detection sensing element, the lock rod state detection sensing element and the door state detection sensing element can sense the states of the door lock and the door and send the states to a computer key through an antenna of the lock cylinder code sheet, and the remote management terminal can read the states of the door lock and the door through the computer key.

The detection circuit of this embodiment includes a state feedback module, a lock state detection unit (lock bar state detection sensing element), a door state detection unit (door state detection sensing element), a transceiver antenna, and a rectification circuit. The state feedback module comprises at least one state feedback loop, each state feedback loop comprises a code sheet and a control switch connected with the code sheet, the code sheet is a feedback element for feeding back state information of equipment (a door or a lock), the code sheet can adopt a radio frequency code sheet, and a code value corresponding to the equipment state is stored in each code sheet. The control switch is used for controlling the working state of the code sheet and is provided with a control end for controlling the cut-off or the conduction of the control switch. The state feedback loop is connected with the feedback loop control circuit, and the feedback loop control circuit is provided with an output end correspondingly connected with the control end of the feedback element control switch. And after the feedback loop control circuit detects the equipment state information, the feedback element connected with the feedback loop control circuit is controlled to control the on-off of the switch according to the equipment state. The lockset state detection unit and the door state detection unit are respectively connected on a feedback loop control circuit and can control the conduction of the feedback loop control circuit where the lockset state detection unit and the door state detection unit are located. The lock state detection unit comprises a reed switch T2 (a first reed switch 5-2b), and the door state detection unit comprises a reed switch T1 (a second reed switch 5-4 b). The state detection unit may also employ other magnetic induction elements, proximity switches, and the like having similar functions.

The state feedback module of the present embodiment includes 3 chips (RFID chip U1, RFID chip U2, RFID chip U3) and 3 NMOS transistors as control switches. The lock state detection unit is used for detecting the unlocking state or the locking state of the lock and controlling the unlocking state signal or the locking state signal of the lock to be connected or disconnected with the control switch connected with the lock. The gate state detection unit is used for detecting the opening state or the closing state of the gate and controlling the opening state signal or the closing state signal of the gate to be connected with the control switch to be switched on or switched off. The receiving and transmitting antenna is connected with the feedback element and sends the equipment state fed back by the feedback element to the outside. The receiving and transmitting antenna of the embodiment is a signal receiving and transmitting module, can transmit the code value (namely, state information) of the switched-on code chip, and simultaneously forms a power supply module of the detection circuit together with the rectifying circuit, so as to receive the alternating current electric energy of the external equipment to supply power to the state feedback module and the feedback loop control circuit. Of course, the power module may also use other methods such as a battery to supply power to the circuit/module in the detection circuit, or separate the antenna for transmitting and receiving signals from the antenna for receiving electric energy, and respectively use two induction coils to accomplish the two functions.

As shown in fig. 9, the state feedback module of this embodiment includes a first state feedback loop, a second state feedback loop and a third state feedback loop, wherein the first state feedback loop includes an RFID chip U1 and an NMOS transistor Q1, the second state feedback loop includes an RFID chip U2 and an NMOS transistor Q3, and the third state feedback loop includes an RFID chip U3 and an NMOS transistor Q4. Each state feedback loop is connected with the power module to obtain a working power supply, for example, a first state feedback loop is taken as AN example, the NMOS transistor Q1 plays a role of a control switch, a gate of the NMOS transistor Q1 is a control end of the control switch, the control end is connected with AN output end of a feedback loop control circuit, when the feedback loop control circuit outputs a high level, the NMOS transistor Q1 is turned on, the first state feedback loop is turned on, the RFID chip U1 and the antenna AN1 form a circuit similar to AN RFID electronic tag, and when a code reading device is used to approach the antenna AN1, a code value of the RFID chip U1 can be read. The working principle of the second state feedback loop is the same as that of the third state feedback loop.

The rectifier circuit of the embodiment includes a capacitor C1, a capacitor C2, a diode D5, and a diode D6. The receiving and transmitting antenna is AN antenna AN1 of the lock core chip, AN antenna AN1 is in communication fit with the chip and the computer key, receives the electric energy of the computer key, provides a working power supply for each circuit/module in the detection circuit, and can send the read code value of the chip to the computer key; the antenna AN1 of this embodiment is AN induction coil, one end of which is grounded and the other end is connected to the feeding end of the chip. The rectification circuit rectifies the electric energy of the computer key received by the antenna AN1 and provides a working power supply for the state feedback module, the lock state detection unit and the door state detection unit.

The power supply end of the antenna AN1 is connected with the power supply ends of the RFID chip U1, the RFID chip U2 and the RFID chip U3 and is connected with the anode of a capacitor C1 in the rectifying circuit; the grounding end of the antenna AN1 is connected with the anode of the diode D6 and the cathode of the capacitor C2 in the rectifying circuit and grounded. In the rectifying circuit, the cathode of the diode D6 is connected with the anode of the diode D5 and the cathode of the capacitor C1, the cathode of the diode D5 is connected with the anode of the capacitor C2, the diode D5 converts alternating current into pulsating direct current, the capacitor C2 completes charging, discharging and filtering functions, the alternating current can provide continuous direct current for the lock state detection unit and the door state detection unit after passing through the rectifying circuit, and the output end of the rectifying circuit is the connecting end of the cathode of the diode D5 and the anode of the capacitor C2.

Code values representing equipment states are stored in 3 code chips (an RFID chip U1, an RFID chip U2 and an RFID chip U3), and the state corresponding to the code value of the RFID chip U1 in the embodiment is that a door is opened and a lock is opened; the state corresponding to the code value of the RFID chip U2 is that the door is closed and the lockset is opened; the code value of the RFID chip U3 corresponds to the state that the door is closed and the lock is open or the door is open and the lock is closed. The ground terminal of the RFID chip U1 is connected with the drain electrode of the NMOS tube Q1, the ground terminal of the RFID chip U2 is connected with the drain electrode of the NMOS tube Q3, and the ground terminal of the RFID chip U3 is connected with the drain electrode of the NMOS tube Q4; the sources of the NMOS transistor Q1, the NMOS transistor Q3 and the NMOS transistor Q4 are grounded respectively.

The output end of the rectifying circuit is connected with a resistor R1, which is a control circuit of the first state feedback loop, and the other end of the resistor R1 is connected with the grid of an NMOS transistor Q1. The output end of the rectifying circuit is also connected to the power supply end of the reed switch T1 (i.e., the power supply end of the door state detecting unit) and the power supply end of the reed switch T2 (i.e., the power supply end of the lock state detecting unit). The reed switch T1 is connected to the control circuit of the second state feedback loop, and a resistor R2 is connected in series between the power supply end of the reed switch T1 and the output end of the rectifying circuit. The reed switch T2 is connected to the control circuit of the third state feedback loop, and a resistor R6 is connected in series between the power supply end of the reed switch T2 and the output end of the rectifying circuit. The output end of the reed switch T2 (i.e. the signal output end of the lock state detection unit) is connected with the gate of the NMOS transistor Q4, and the output end of the reed switch T1 is connected with the gate of the NMOS transistor Q3.

In order to prevent the NMOS transistors Q1 and Q4 from being turned on simultaneously, which results in the two RFID chips U1 and U3 being turned on simultaneously and unable to feed back the device state, and prevent the NMOS transistors Q3 and Q4 from being turned on simultaneously, which results in the two RFID chips U2 and U3 being turned on simultaneously and unable to feed back the device state, the detection circuit further includes a first ground loop J1 and a second ground loop J2. The first ground loop J1 is connected to the control terminal of the first state feedback loop (the gate of the NMOS transistor Q1), and the second ground loop J2 is connected to the control terminal of the second state feedback loop (the gate of the NMOS transistor Q3). The first ground loop J1 includes a first ground switch NMOS transistor Q2, a drain of the NMOS transistor Q2 is connected to a gate of the NMOS transistor Q1, and a source of the NMOS transistor Q2 is connected to ground, the gate (control end) is connected to an output end S14 of the reed switch T1 and an output end S16 of the reed switch T2, so that when the reed switch T2 is turned on as a control circuit of the third state feedback loop (the NMOS transistor Q4 is turned on), the first ground loop J1 is turned on, the control end of the NMOS transistor Q1 is grounded, and the first state feedback loop is turned off. The second ground loop J2 includes a second ground switch NMOS transistor Q5, the drain of the NMOS transistor Q5 is connected to the gate of the NMOS transistor Q3, the source of the NMOS transistor Q5 is grounded, and the gate is connected to the output terminal S16 of the reed switch T2, so that the second ground loop J2 is turned on when the reed switch T2 is turned on as the control circuit of the third state feedback loop, and further the control terminal of the NMOS transistor Q3 is grounded, and the second state feedback loop is turned off.

In a further optimized scheme, a voltage division circuit and a filter circuit can be further arranged in the detection circuit, so that a certain specific voltage is output, and the output voltage is more stable. A first voltage division circuit is formed by a resistor R3 and is arranged between the grid of the NMOS tube Q2 and the ground; the resistor R4 forms a second voltage division circuit and is arranged between the grid of the NMOS tube Q3 and the ground; the resistor R5 constitutes a third voltage dividing circuit, and is disposed between the gate of the NMOS transistor Q4 and ground. The capacitor C3 forms a first filter circuit, and the capacitor C3 is connected with the resistor R3 in parallel; the capacitor C4 forms a second filter circuit, and the capacitor C4 is connected with the resistor R4 in parallel; the capacitor C5 forms a third filter circuit, and the capacitor C5 is connected with the resistor R5 in parallel; the negative electrodes of the capacitor C3, the capacitor C4 and the capacitor C5 are respectively grounded; the three filter circuits and the three voltage division circuits mainly play the roles of filtering and stabilizing circuits.

The reed switch T1 and the reed switch T2 are switch type reed switches, the reed switch T1 is used for door state detection, the reed switch T2 is used for lock state detection, and a loop is formed after a certain reed switch is connected. The state of the circuit is controlled by the conduction and disconnection of the reed switch T1 and the reed switch T2, and the states of the door and the lock are thereby judged.

When the computer key approaches the antenna AN1, the built-in coil of the computer key can emit radio waves to make the antenna AN1 generate alternating current mutual inductance voltage to supply power to the circuit. The reed switch T1 and the reed switch T2 are opened or closed according to the states of the door and the lock, and corresponding loops are generated; the rectifying circuit rectifies the alternating current mutual inductance voltage and provides continuous direct current for the load; each control circuit controls the on/off of the NMOS transistor Q1, the NMOS transistor Q3, and the NMOS transistor Q4, so as to control the grounding end of the corresponding RFID chip to be grounded to conduct the RFID chip, code values corresponding to different (logical) states are stored in different RFID chips in advance, and the conducted RFID chip transmits the code values to the computer key in a radio frequency signal mode through the antenna AN 1.

The following describes a specific operation of the detection circuit of the present embodiment: the lock state of the embodiment is respectively an unlocking state and a locking state, and the door state is also respectively a door closing state and a door opening state. When the door is closed, the reed switch T1 is conducted, and when the door is opened, the reed switch T1 is disconnected; the reed switch T2 is on when the lock is locked and the reed switch T2 is off when the lock is unlocked. The following four states can be obtained through permutation and combination: the door opening state, the door closing state and the door opening state are respectively unlocked. In the actual operation, in the door opening state, the lock is closed or opened without influencing the entering of workers into the facility, so that the state and the door closing state are combined into a state. The above operation states respectively correspond to three RFID chips with different built-in code values: the unlocked door open state is represented by the code value of the RFID chip U1; the unlocked and closed door state is represented by the code value of the RFID chip U2; the door closed and door open states are represented by the code values of the RFID chip U3. The three RFID chips of the embodiment are all arranged on a PCB of the lockset, power is supplied through AN antenna AN1 and the reed switch T1 and the reed switch T2 are controlled, the three RFID chips transmit a built-in unique code value to a computer key in a wireless mode after being powered on, and the computer key identifies and expresses the state of the computer key and feeds the code value back to AN anti-misoperation system of the management terminal.

The following table shows the states of the dry reed pipe T1 and the dry reed pipe T2 and the corresponding action chips for different combinations of the door and the lock:

state combination of door and lock	Reed pipe T1	Reed pipe T2	Working chip
				Unlocking door	Disconnect	Disconnect	RFID chip U1
Unlocking and closing door	Conduction of	Disconnect	RFID chip U2
				Locking door	Conduction of	Conduction of	RFID chip U3
Locking door	Disconnect	Conduction of	RFID chip U3

The following describes the circuit operation principle of the above four states with reference to fig. 9:

when the circuit starts to work, the rectification circuit outputs high level after supplying power.

Under the unlocking door-opening state, the reed switch T1 and the reed switch T2 are both disconnected, the reed switch T1 and the reed switch T2 are used as control circuits of a second state feedback loop and a third state feedback loop, no voltage is output at the output ends, and the second state feedback loop and the third state feedback loop are cut off; only the R1 as the control circuit of the first state feedback loop outputs a high level, the first state feedback loop is turned on, the state feedback module feeds back the code value of the RFID chip U1, and the code value of the RFID chip U1 is transmitted to the computer key through the antenna AN1 (i.e., a transmitting/receiving antenna). The current comprehensive state of the cabinet door and the lockset can be known by the computer key.

When the door is unlocked and closed, the reed switch T1 is switched on, the reed switch T2 is switched off, the reed switch T1 outputs high level, and a second state feedback loop is switched on; because the reed switch T2 is off, no voltage is output at the output end of the reed switch T2, and the third state feedback loop is cut off; at the same time, the high level output by the reed switch T1 turns on the first ground loop, so that the control switch (NMOS transistor Q1) of the first state feedback loop is turned off, and the first state feedback loop cannot be turned on. The state feedback module feeds back the code value of the RFID chip U2, and the code value of the RFID chip U2 is sent to the computer key through the antenna AN 1. The current comprehensive state of the cabinet door and the lockset can be known by the computer key.

In the closing state, the reed switch T1 and the reed switch T2 are turned on, the reed switch T2 outputs a high level, the third state feedback loop is turned on, and the first ground loop and the second ground loop are turned on, so that the NMOS transistors Q1 and Q3 are turned off. The state feedback module feeds back the code value of the RFID chip U2, and the code value of the RFID chip U2 is sent to the computer key through the antenna AN 1. The current comprehensive state of the cabinet door and the lockset can be known by the computer key.

In the door-opening state of the lock, the reed switch T1 is switched off, the reed switch T2 is switched on, the reed switch T2 outputs high level, the feedback loop of the third state is switched on, and the first grounding loop is switched on at the same time, so that the NMOS transistor Q1 is switched off. Because the reed switch T1 is disconnected, the second feedback loop does not work, the code value of the RFID chip U3 is fed back by the state feedback module, and the code value of the RFID chip U2 is sent to the computer key through the antenna AN 1. The current comprehensive state of the cabinet door and the lockset can be known by the computer key. This state is the same as the fourth state and may be defined as the lock-off state.

In addition, as shown in fig. 10, the second grounding switch in the second grounding loop and the grounding switch of the third state feedback loop share one NMOS transistor. This can simplify the circuit configuration.

Through the detection circuit, the state of the door and the lock can be read simultaneously when the computer key is communicated with the lock core chip, and the state information of the door and the lock can be fed back to the management terminal, so that a manager can conveniently master site information in time, and safety management is realized. If the lockset is only provided with the lockset state detection unit or the door state detection unit, only one state feedback loop and a feedback loop control circuit for controlling the working state of the state feedback loop can be correspondingly arranged in the detection circuit.

The utility model also provides a lock control system, as shown in FIG. 11, this lock control system includes tool to lock, management terminal and computer key, and the tool to lock can set up on the door of equipment computer lab or the cabinet door of facilities such as looped netowrk cabinet, rack, and the computer key is connected with management terminal communication to be equipped with the collection system who reads core (sign indicating number) piece sign indicating number value, the computer key passes through management terminal and authorizes the back, can unblock the collection of operation and status information to the tool to lock.

The lock control system comprises the following working procedures: the management terminal issues a lock unlocking authority for a specific lock code (an identification code is stored in a lock core code sheet of the lock) to a computer key according to a business process (or an operation process), a worker holds the computer key to go to a working site, inserts the key into a lock core of the lock, then the computer key reads a code value of the lock core code sheet, verifies whether the code value accords with a lock ID code of authorized operation, and unlocks the lock after confirming that the code value is correct, in the operation process, the state of the lock and the door can be confirmed by the code value output after the computer key collects the change due to the change of the corresponding code value in a state detection component, and the collected state information is fed back to the management terminal, so that the manager can timely obtain the last operation state of the lock and the door, the management of the lock is convenient, and the situation that the lock is forgotten to be locked or the door is forgotten to be closed is prevented, and a safer and more reliable guarantee is provided for the power production environment.

In the aforementioned embodiment, the state information of the lock and the state information of the door are fed back to the management terminal through the computer key by the detection circuit arranged in the lock. However, the reed switches of the detection units in different states in the detection circuit are mutually independent, and the reed switch in an empty state (empty logic) does not affect the reed switch of the working logic, for example, when the reed switch T2 works, the reed switch T1 in the empty state does not affect the working of the reed switch T2, so that under the condition that the door state detection unit is not arranged, the detection circuit can only feed back the state of the lock detected by the lock state detection unit, and only code values corresponding to different logic states and stored in the RFID chip need to be correspondingly modified.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the same, although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced with equivalents, and any modification or equivalent replacement without departing from the spirit and scope of the present invention should be covered by the scope of the present invention.

Claims (15)

1. Lock with state detection function, comprising: the lock comprises a lock shell and a lock lug, wherein an unlocking component and a lock cylinder are arranged in the lock shell, and the unlocking component comprises a lock rod which is matched with the lock lug to realize locking;

the method is characterized in that: the lock state detection device comprises a lock state detection unit and a detection circuit, wherein the lock state detection unit is used for detecting the position state of the lock rod, and the detection circuit is electrically connected with the lock state detection unit; the detection circuit is in communication connection with a computer key matched with the lock for use, and the lock state detection unit detects state change information of the lock rod and sends the state change information to the computer key through the detection circuit.

2. The lock with a state detecting function according to claim 1, wherein: the unlocking and locking assembly also comprises an unlocking and locking limiting rod which limits the lock rod at an unlocking position or a locking position, and a limiting rod resetting piece which enables the unlocking and locking limiting rod to reset;

two ends of the lock rod penetrate through two opposite side walls of the lock shell and are exposed out of the lock shell, the lock rod can move between an unlocking position and a locking position under the action of external force, and a first limiting matching part and a second limiting matching part are arranged on the lock rod;

the unlocking and locking limiting rod is provided with a buckling part which can be matched with the first limiting matching part or the second limiting matching part, the unlocking and locking limiting rod is driven by a lock cylinder arranged in the lock shell and can be separated from or close to the lock rod under the drive of the lock cylinder or a limiting rod reset piece, so that the buckling part is matched with or separated from the first limiting matching part or the second limiting matching part.

3. The lock with a state detecting function according to claim 2, wherein: the lock core is connected with a linkage rod, the linkage rod is provided with a matching part which is movably matched with the unlocking limiting rod, and the linkage rod drives the unlocking limiting rod to be far away from the lock rod when rotating along with the lock core.

4. The lock with a state detection function according to claim 2 or 3, characterized in that: an unlocking limiting element is arranged between the lock rod and the lock shell and limits the pulling-out position of the lock rod after unlocking.

5. The lock with a state detecting function according to claim 1, wherein: the detection circuit includes:

the state feedback module comprises at least one state feedback loop, the state feedback loop comprises a feedback element and a control switch connected with the feedback element, and the control switch is provided with a control end for controlling the control switch to be switched on or off;

the lock state detection unit controls the on-off of the feedback loop control circuit according to the detected lock state;

the receiving and transmitting antenna is connected with the state feedback element and is in communication connection with a computer key;

and the power supply module supplies power to the state feedback module and the feedback loop control circuit.

6. The lock with state detection function according to claim 5, characterized in that: the state detection assembly also comprises a door state detection unit for detecting the opening/closing state of the door, the door state detection unit is electrically connected with the detection circuit, and the door state detection unit detects the state change information of the door and sends the state change information to the computer key through the detection circuit;

the lock state detection unit and the door state detection unit are respectively connected to different feedback loop control circuits in the detection circuit, and the lock state detection unit and the door state detection unit respectively control the on-off of the feedback loop control circuit in which the lock state detection unit and the door state detection unit are respectively located according to the detected lock state and the detected door state.

7. The lock with a state detecting function according to claim 6, wherein: the state feedback module comprises a first state feedback loop, a second state feedback loop and a third state feedback loop, the feedback loop control circuit comprises a first feedback loop control circuit, a second feedback loop control circuit and a third feedback loop control circuit which are respectively and correspondingly connected with the first state feedback loop, the second state feedback loop and the third state feedback loop, the lock state detection unit is connected to the second feedback loop control circuit, and the door state detection unit is connected to the third feedback loop control circuit;

the control end of the control switch of the first state feedback loop is connected with a first grounding loop, the first grounding loop comprises a first grounding switch, the control end of the first grounding switch is connected with the output end of the second feedback loop control circuit, and the first grounding loop is conducted when the second feedback loop control circuit is conducted;

the control end of the control switch of the second state feedback loop is connected with a second grounding loop, the second grounding loop comprises a second grounding switch, the control end of the second grounding switch is connected with the output end of the third feedback loop control circuit, and the second grounding loop is conducted when the third feedback loop control circuit is conducted.

8. The lock with a state detecting function according to claim 7, wherein: the feedback element is an RFID chip, the control switch is an NMOS tube, the grid electrode of the NMOS tube is the control end of the control switch, the drain electrode of the NMOS tube is connected with the grounding end of the RFID chip, and the source electrode of the NMOS tube is grounded.

9. The lock with a state detection function according to claim 7 or 8, characterized in that: the first grounding switch and/or the second grounding switch are NMOS tubes, the grid electrode of each NMOS tube is the control end of each grounding switch, the drain electrode of each NMOS tube is connected with the control end of the control switch of the state feedback loop connected with the grounding loop where the NMOS tube is located, and the source electrode of each NMOS tube is grounded.

10. The lock with a state detection function according to claim 5 or 6, characterized in that: the receiving and transmitting antenna is an induction antenna of the identity identification code chip of the lockset.

11. The lock with state detection function according to claim 10, characterized in that: the detection circuit further comprises a rectifying circuit, the transmitting-receiving antenna and the rectifying circuit are connected to form a power supply module, and the transmitting-receiving antenna receives electric energy of the computer key and supplies power to the state feedback module and the feedback loop control circuit after the electric energy is rectified by the rectifying circuit.

12. The lock with the state detecting function according to claim 1, 5, 6, 7, 8 or 11, wherein: the detection circuit is arranged on a PCB (printed circuit board) positioned in the lock shell.

13. The lock with the state detecting function according to claim 1, 5, 6, 7, 8 or 11, wherein: the lock state detection unit comprises a magnet arranged on the lock rod and a reed switch correspondingly arranged in the lock shell, and the reed switch is electrically connected with the detection circuit.

14. The lock with the state detecting function according to claim 6, 7 or 8, wherein: the door state detection unit comprises a reed switch arranged in the lock shell and a magnet correspondingly arranged on the door frame, and the reed switch is electrically connected with the detection circuit.

15. A lock control system comprising: tool to lock, computer key and management terminal, its characterized in that: the lock with the state detection function as claimed in any one of claims 1 to 14, wherein the computer key is in communication connection with the management terminal, and the computer key is provided with a state acquisition device for acquiring the state of the lock.

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