CN209761035U - Door lock with control bolt and RFID module - Google Patents

Abstract

The utility model discloses a door lock with a control bolt and an RFID module, which comprises a control bolt, a micro-stepping motor, an RFID card reader, a key with a built-in RFID tag, a control board, a battery, a battery box, a battery cover, and a power detection Module, low battery indicator light, lock body, lock cylinder, front shell and rear shell. The control bolt is controlled by a micro-stepping motor, which is inserted into or removed from the bolt slot of the inner lock cylinder to realize arming and disarming. When arming, the control bolt blocks the inner lock cylinder, so that the key cannot be twisted to unlock the inner lock cylinder; when disarming, the control bolt moves out of the inner lock cylinder, and the key can turn the inner lock cylinder to unlock. The RFID card reader is used to read the key information in the RFID tag and input it to the control board for matching identification; after the key is matched, the control board controls the micro stepping motor to move the control bolt out of the bolt slot of the inner lock cylinder for disarming. The utility model greatly improves the safety and reliability of the lockset while being compatible with the traditional key opening method, makes the lockset difficult to crack technically, and meanwhile has low cost and is easy to install and maintain.

Description

A door lock with a control bolt and an RFID module

technical field

The utility model relates to the field of door locks, in particular to a door lock with a control bolt and an RFID module.

Background technique

Door locks include mechanical door locks and smart locks. The lock cylinders of traditional mechanical door locks are divided into different levels according to the security level from low to high, such as A level, B level, super B level, and C level. The lower level is easy to be cracked by technology, and the higher level has improved security. But the cost is high, and the difficulty of being cracked by technology is far less than that of unlocking methods such as electronic digital keys. Smart locks are improved on the basis of traditional mechanical locks. They are more intelligent locks in terms of user identification, security, and management. Since the basis of smart locks is still traditional mechanical locks, the safety of mechanical locks determines the quality of locks. overall security.

Contents of the invention

In order to solve the above problems and improve the safety of the door lock, the utility model provides a door lock with a control bolt and an RFID module. The specific technical scheme is as follows:

A door lock with a control pin and an RFID module, including a control pin, a micro stepping motor, an RFID module, a control board, a battery, a battery box, a battery cover, a battery detection module, a low battery indicator light, a lock body, a lock cylinder, Front shell and rear shell.

Wherein, as shown in FIG. 1 , the control bolt is a section of metal rod, one end of which is inserted into a hole fixed on the support arm of the front housing base plate, and the other end is inserted into the bolt groove of the lock cylinder. The lock cylinder includes a lock cylinder and an inner lock cylinder, the inner lock cylinder is a rotatable part inserted into the key, and the outer shell is called the lock cylinder. The bolt groove is a cylindrical opening that goes through the lock cylinder and goes deep into the inner lock cylinder. The control bolt is limited by the holes at both ends and can only move axially. The micro-stepping motor has a screw rod, which is fixed on the base plate of the front housing, and the middle part of the control bolt is fixedly installed on the screw rod slider, and the rotation of the micro-stepping motor drives the screw rod to rotate to make the slider move along the motor shaft direction. Thereby driving the control pin to move. When it is necessary to unlock or lock the door, such as when the RFID card reader detects that the key is inserted or pulled out, the control circuit outputs a pulse signal to the motor to control the rotation angle of the motor, so that the control bolt can be accurately inserted into or removed from the bolt slot of the inner lock cylinder. So as to achieve arming and disarming. In the armed state, the control bolt is inserted into the inner lock cylinder, and the key cannot turn the inner lock cylinder at this time, and the lock cannot be unlocked; in the disarmed state, the control bolt is moved out of the inner lock cylinder, and the key can be turned to unlock the inner lock cylinder at this time.

The RFID (Radio Frequency Identification, radio frequency identification) module includes an RFID card reader and an RFID key. The RFID key has a built-in RFID tag for storing a digital key. The RFID card reader is installed on the front panel of the front case and Next to the lock cylinder, when the RFID tag is close to the RFID card reader, the RFID card reader communicates with the RFID key, reads the digital key and inputs it to the MCU (Microcontroller Unit, Microcontroller Unit) on the control board ) for discrimination. The MCU realizes the door lock control function according to the set program. The MCU performs matching judgment on the digital key, and outputs corresponding control instructions to control the working state of the micro stepping motor according to the judgment result. When the key is matched correctly, the MCU outputs an instruction to control the motor to rotate forward at a certain angle so that the control pin moves out of the inner lock cylinder to disarm; after the RFID key is pulled out, the MCU starts the motor to reverse according to the preset time delay Insert the control pin into the inner cylinder to arm. Through the double fortification method of mechanical lock cylinder and RFID authentication, the safety and anti-theft capability of the door lock can be significantly improved, and the possibility of the door lock being cracked by technology can be greatly reduced.

The control board and each functional module are powered by a battery, and a power detection module and a low power warning light are installed on the control board. The power detection module calculates the remaining power of the battery by detecting the voltage or current of the control board circuit. When the remaining power is lower than the preset low power threshold, the MCU outputs instructions to control the low power warning light to turn on or Blinking, reminding the user to replace the battery. The low battery warning light adopts LED and is installed on the rear housing panel of the door lock. When the power detection module detects that the remaining power is lower than the set dangerous power threshold, the MCU outputs instructions to directly control the micro stepper motor to disarm; when the power returns to above the dangerous power threshold, the MCU controls the motor to re-arm. This method can prevent the problem that the door lock cannot be opened by the key because the control bolt cannot be disarmed due to insufficient power.

Described battery adopts lithium battery or storage battery, is installed in the battery box. The battery box is installed in the rear shell of the door lock, and a battery cover is arranged on the side of the rear shell, and the battery can be easily loaded or taken out by opening the battery cover without opening the rear shell of the door lock.

Compared with the prior art, the beneficial effect of the utility model is: while being compatible with the traditional key opening method, the safety and reliability of the lock are greatly improved, the lock is difficult to crack technically, the cost is low, and it is easy to install and maintain.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described

Fig. 1 Structural schematic diagram of left view, front view and right view of the utility model

Fig. 2 Enlarged schematic diagram of utility model front view structure

Figure 3 Schematic diagram of the main components of the utility model

Figure 4 Schematic diagram of utility model structure principle

Figure 5 is a schematic diagram of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is introduced as follows.

Fig. 1 has 3 small figures from left to right, the left small figure is the left side view of the utility model, is the internal structure of the front housing seen from the front housing direction; the middle small figure is the front view of the utility model, It is the structure seen from the door edge to the direction of the deadbolt; the small picture on the right is the right side view of the utility model, which is the internal structure of the rear housing seen from the direction of the rear housing. In order to express the structure of the utility model more clearly, Fig. 1 regards the front panel and the rear panel as transparent to describe the internal structure of the utility model. The solid line in the figure represents the contour line, and the dotted line represents the occluded perspective contour line.

The parts in Fig. 1 are respectively: door body (1), front casing (2), rear casing (3), lock body (4), deadbolt (5), lock cylinder (6), lock cylinder (7 ), inner lock cylinder (8), anti-lock handle (9), lock cylinder dial (10), battery (11), RFID key (12), RFID card reader (13), micro stepping motor (14), Screw rod (15), control pin (16), screw rod slider (17), pin groove (18), support arm (19), control board (20), power detection module (21), low battery indicator light ( 22), inner handle (23), outer handle (24), fixing screw (25), base plate (26), battery cover (27).

As shown in Figure 1, the main components of the utility model include control pin (16), micro stepping motor (14), RFID module (12) and (13), control board (16), battery (11), battery box , battery cover (27), power detection module (21), low battery indicator light (22), lock body (4), lock cylinder (6), front shell (2) and rear shell (3).

As shown in Fig. 1, Fig. 2 and Fig. 3, the lock body is installed in the door body, and the front housing and the rear housing are installed and fixed on the door body by bolts passing through the door panel, and can only be opened from the rear housing in the door. The lock cylinder runs through the front and back shells and is installed on the lock body. Both the front and rear shells include a base plate and a panel, the side close to the door is the base plate, the components in the shell are fixed on the base plate, and the outside is the panel. The outer handle and the inner handle are installed on the front and rear shells through the square core and the handle square core hole. The lock cylinder includes a lock cylinder, an inner lock cylinder, a lock cylinder dial and an anti-lock handle. The inner lock cylinder is a part that can be rotated by inserting a key. The outer shell is called a lock cylinder. The lock cylinder dial is used to push out or retract the lock Back, the anti-lock handle is used for locking and unlocking inside the house.

The lock cylinder is a lock cylinder with a bolt groove, and the bolt groove is a cylindrical opening that penetrates the lock cylinder and goes deep into the inner lock cylinder. The control bolt is a section of cylindrical metal rod, one end of which is inserted into the hole fixed on the support arm of the front housing base plate, and the other end is inserted into the bolt groove of the lock cylinder. axial movement. As shown in Figure 1 and Figure 2, the support arm is a section of cylindrical metal rod, one end of which is fixed on the base plate of the front housing with screws, and the other side has a circular opening, and one end of the control bolt is inserted into the opening . Restricted by the hole, the control pin can only move axially in the hole. The function of the support arm is to support and limit the moving direction of the control pin. When the control bolt is inserted into the bolt groove of the inner lock cylinder, the inner lock cylinder cannot be turned even if the key matches, which increases the safety of the lock cylinder; when the control bolt moves out of the inner lock cylinder bolt groove, the key can turn the inner lock core, turn the dial to realize unlocking.

The utility model adopts a two-phase four-wire micro-stepping motor to realize the movement control of the control bolt. As shown in Fig. 1, Fig. 2 and Fig. 3, the output shaft of the micro stepper motor has an extended screw rod, and the base is fixed on the base plate of the front case by screws. The middle part of the control bolt is fixedly installed on the screw rod slider, and the fixing methods include but not limited to screw fixing, bonding, welding, socketing and the like. The inner thread of the screw slider is matched with the thread of the screw, and when the micro-stepping motor rotates, it drives the screw to rotate, so that the slider of the screw moves along the direction of the motor shaft, thereby driving the control bolt to move; when the screw is stationary, the sliding The block and control pin stop moving. When it is detected that the user wants to unlock or lock the door, such as when the RFID card reader detects that the key is inserted or pulled out, the control circuit outputs a pulse signal to the micro stepping motor to control the rotation angle of the motor so that the control bolt can be inserted accurately Or move out of the key slot of the inner lock cylinder, so as to realize arming and disarming. In the armed state, the control bolt is inserted into the inner lock cylinder, and the key cannot turn the inner lock cylinder at this time, and the lock cannot be unlocked; in the disarmed state, the control bolt is moved out of the inner lock cylinder, and the key can be turned to unlock the inner lock cylinder at this time.

As shown in Figure 3, the RFID (Radio Frequency Identification, radio frequency identification) module includes an RFID card reader and an RFID key, the RFID key has a built-in RFID tag for storing a digital key, and the RFID card reader is installed on the front The front panel of the housing is close to the lock cylinder. When the RFID tag is close to the RFID card reader, the RFID tag enters the magnetic field near the RFID card reader, receives the radio frequency signal sent by the RFID card reader, and sends out the password stored in the tag chip by virtue of the energy obtained by the induced current. key information. The RFID card reader communicates wirelessly with the RFID key, reads the digital key information and inputs it to the MCU on the control board for identification.

As shown in Figure 4 and Figure 5, the utility model utilizes the MCU arranged on the control board to realize the control function of the door lock according to the set program, and the MCU receives the RFID card reader and the power detection module The input signal automatically controls the working state of the micro stepper motor and the LED low battery indicator light according to the set program. After receiving the digital key information read by the RFID card reader, the MCU performs a matching judgment on the digital key, and outputs a corresponding control command to control the working state of the micro stepping motor according to the judgment result. When the key is matched correctly, the MCU outputs an instruction to control the motor to rotate forward at a set angle so that the control pin moves out of the inner lock cylinder to disarm; after pulling out the RFID key, the MCU starts the motor according to the preset time delay , reverse the set angle so that the control bolt is inserted into the inner lock cylinder for arming, wherein the time delay can be set to 5 seconds, 10 seconds, 30 seconds, 60 seconds, etc. according to requirements, and the utility model is preferably 10 seconds; the miniature The setting angle that the stepper motor rotates is calculated according to the pitch of the screw mandrel and the depth of the control bolt inserted into the inner lock cylinder bolt groove.

The utility model can significantly improve the safety and anti-theft capability of the door lock through the double fortification mode of the mechanical lock cylinder and RFID authentication, and greatly reduce the possibility of the door lock being cracked by technology.

As shown in Fig. 1, Fig. 4, and Fig. 5, the control board and each functional module are powered by a battery pack, and the type of battery adopted can be a lithium battery, a dry battery, a storage battery, etc., and the utility model preferably rechargeable lithium battery, because lithium The battery power is large and the battery life is relatively long. The lithium battery is installed in the battery box. The battery box is installed in the rear shell of the door lock, and a battery cover is arranged on the side of the rear shell. When the user needs to take out the battery pack for charging or replace a new battery pack, it can be opened directly on the side of the rear shell The battery cover makes it easy to load or remove the battery without opening the rear case of the door lock.

As shown in Fig. 1 and Fig. 5, a power detection module and a low power indicator light are installed on the control board. The power detection module adopts the power detection module of the board-mounted high-precision voltage detection chip widely used in the market. The working process of power detection is to calculate the remaining power of the battery by detecting the voltage or current of the control board circuit. When the remaining power is lower than the preset low power threshold, the MCU output command controls the low power warning light to turn on. or flashing, prompting the user to replace the battery. Specifically, the low-battery indicator light preferably adopts a color-changing LED. Yellow means that the remaining power is less than 20%, which is a low power threshold; red means that the remaining power is less than 10%, which is a dangerous power threshold. The low battery warning light is installed on the rear housing panel of the door lock. In particular, when the power detection module detects that the remaining power is lower than the dangerous power threshold, the MCU outputs an instruction to directly control the micro stepper motor to move the control pin out of the inner lock cylinder for disarming; when the power returns to the dangerous power threshold Above, the MCU controls the motor to insert the control pin into the inner lock cylinder to re-arm. This method can prevent the problem that the door lock cannot be opened by the key because the control bolt cannot be disarmed due to insufficient power.

The specific embodiments above are only used to illustrate the present utility model, rather than to limit the present utility model. Equivalent deformations and replacements of the above-mentioned embodiments by those skilled in the art are within the protection scope of the claims.

Claims (5)

1. A door lock with a control bolt and an RFID module, comprising a lock body, a lock cylinder, a front casing and a rear casing, characterized in that: it also includes a control bolt, a micro stepping motor, an RFID module, a control board, a power supply ; Wherein, the control bolt is a section of metal rod, one end of which is inserted into the bolt groove of the lock cylinder, the bolt groove is a cylindrical opening that penetrates the lock cylinder and goes deep into the inner lock cylinder, and the control bolt is restricted by the bolt groove and can only move axially , when the control bolt is inserted into the bolt groove of the inner lock cylinder, the inner lock cylinder cannot be turned even if the key matches; the micro stepping motor has a screw rod, which is fixed on the base plate of the front shell, and the middle part of the control bolt is fixedly installed on the screw rod On the slider, the motor rotates to drive the screw to rotate to make the slider move along the direction of the motor shaft, thereby driving the control bolt to move; the RFID module includes an RFID card reader and an RFID key, and the RFID key has a built-in RFID tag for storing digital keys. The card reader is installed on the front panel of the front shell and close to the lock cylinder. When the RFID tag is close to the RFID card reader, the RFID card reader communicates with the RFID key, reads the digital key and inputs it to the MCU on the control board; MCU Match the digital key and realize the door lock control function according to the set program. When the key matches, the MCU outputs an instruction to control the motor to rotate forward at a certain angle to move the control bolt out of the inner lock cylinder for disarming. After pulling out the RFID key, The MCU starts the motor to reverse according to the time delay set in advance, so that the control bolt is inserted into the inner lock cylinder, so that the key cannot be turned to unlock, thus realizing arming. 2. A door lock with a control pin and an RFID module according to claim 1, characterized in that: it also includes a battery detection module and a low battery indicator light; the control board and each functional module of the door lock are powered by a battery , the control board is equipped with a power detection module and a low battery indicator light. The power detection module calculates the remaining power of the battery by detecting the voltage or current of the control board circuit. When the remaining power is lower than the preset low power threshold, the MCU The output command controls the low battery indicator light to turn on or flash to remind the user to replace the battery. The low battery indicator light adopts LED and is installed on the rear housing panel of the door lock. 3. A door lock with a control bolt and an RFID module according to claim 1 or 2, characterized in that: when the power detection module on the control board detects that the remaining power is lower than the set dangerous power threshold , the MCU outputs commands to directly control the motor to disarm. When the power is restored to above the dangerous power threshold, the MCU controls the micro-stepping motor to re-arm. 4. A door lock with control bolt and RFID module according to claim 1 or 2, characterized in that: the control board and each functional module are powered by a battery pack, the battery is installed in the battery box, and the battery box is installed in the door In the rear case of the lock, a battery cover is arranged on the side of the rear case, and the battery can be easily loaded or removed by opening the battery cover. 5. A door lock with a control pin and an RFID module according to claim 1 or 2, characterized in that: the other end of the control pin is inserted into the hole on the support arm of the front housing substrate, and the control pin only Able to move axially along the wall of the slot.