CN105952273B - Closeable lock cylinder, digital door lock and closing method thereof - Google Patents

Abstract

The invention discloses a closeable lock cylinder, a digital door lock and a closing method thereof. The invention is especially provided with the clutch locking component, prevents the first clutch device from entering the sleeve, and achieves the aim of closing the lock cylinder. After the lock core is sealed, the door lock cannot be unlocked by rotating the key core, so that the safety of the mechanical door lock can be effectively improved.

Description

A lock core, a digital door lock and a closing method thereof

Technical Field

The present invention relates to the technical field of door locks, and in particular to a closable lock core, a digital door lock and a closing method thereof.

Background technique

Generally, for the purpose of prevention and security, doors and exits of homes, companies and shops are equipped with door locks. In recent years, digital door locks have gradually replaced mechanical door locks.

In order to activate these digital door locks, currently, a method of bringing an electronic key into contact with an electronic key touch portion, a method of pressing a keyboard using a mechanical switch such as a tactile switch or a membrane switch to input a password, and a method of using a fingerprint are used.

Existing digital door locks generally include: a panel and a lock core set in the door; the lock core includes a cam and a motor that drives the cam to rotate. When the user enters the correct secret key, the motor drives the cam to rotate and finally opens the bolt of the door lock. However, all door locks have the problem of high dependence on power supply. Once the power supply and the motor are disconnected, the door lock cannot be opened, and the reliability is low.

The existing technology is to add a mechanical key core on the basis of the digital door lock. The key core is a pin or blade type. In addition to the normal input of the secret key to open the door lock, the user can also insert a physical key to open the door lock. In the existing technology, the above two unlocking methods are available at the same time. The existence of the physical key core provides conditions for technical unlocking, leaving security loopholes for the digital door lock.

Summary of the invention

In view of this, the present invention provides a lock core that can be closed.

The objective of the present invention is achieved through the following technical scheme: a closable lock core, comprising a cam for starting a lock bolt and a key core arranged at one end of the cam, the cam comprising a sleeve and an engaging portion, the engaging portion extending radially from the sleeve; the key core is coaxial with the sleeve, the end of the key core is transmission-connected to the sleeve through a first clutch device extending into the sleeve, and also comprises a clutch locking assembly, the clutch locking assembly comprising a top block slidably disposed in the sleeve, and a limit assembly for locking the position of the top block.

The cam, key core, and first clutch device can all be implemented using existing technologies. After the key is inserted into the key core, the key core can be pushed toward the sleeve, and finally the first clutch device can be pushed into the sleeve to achieve transmission connection with the sleeve. At this time, rotating the key core can drive the meshing part to rotate and finally move the bolt of the door lock. The above are all consistent with the existing technology. The present invention specially arranges a clutch locking assembly, and the limit assembly can lock the top block in the sleeve, preventing the first clutch device from entering the sleeve, thereby achieving the purpose of closing the lock core. After the lock core is closed, the door lock cannot be opened by rotating the key core, thereby achieving the purpose of improving the safety of the mechanical door lock. When the key core needs to be used to unlock the door, the limit assembly releases the lock on the top block, and the first clutch device can push the top block away and enter the sleeve to achieve transmission connection.

Furthermore, the front end of the top block extends into the sleeve from the other end of the cam; the end of the top block is also connected to a reset mechanism; the limit assembly includes at least one limit groove opening on the side of the top block and arranged radially along the top block, and a limit bolt arranged on the outside of the top block and matching the limit groove, and also includes a first driving mechanism for driving the limit bolt to insert/exit the limit groove.

After the unlocking action is completed and the thrust applied to the key core disappears, the reset mechanism can push the top block back into the sleeve and release the connection state between the first clutch device and the sleeve, thereby improving the safety of the lock core. At the same time, it is also convenient to start the locking of the top block by the limit assembly at any time. Particularly preferably, the present invention uses a limit groove and a limit bolt as the limit assembly, and the limit bolt can be inserted into or withdrawn from the limit groove under the drive of the first driving mechanism. After the limit bolt is inserted into the limit groove, the two engage with each other so that the top block cannot move, thereby achieving the purpose of locking the top block in the sleeve. After the limit bolt withdraws from the limit groove, the locking of the top block is released, and the first clutch device can push the top block out of the sleeve and engage and connect with the sleeve. The first driving mechanism can be implemented by any existing technology, such as a solenoid valve, a cylinder, a motor, etc. The use of the limit groove and the limit bolt as the limit assembly has a simple structure and high reliability, is easy to implement and is conducive to popularization and application. Both the top block and the limit bolt can be made of metal to prevent the lock core from being violently damaged.

Furthermore, the first driving mechanism is a double-coil electromagnetic valve; the valve core of the electromagnetic valve moves along the radial direction of the top block; and the limit bolt is fixed on the valve core.

The dual-coil solenoid valve is bistable and can maintain the locked or unlocked state of the top block without continuous power supply, reducing the dependence of the clutch locking component on electricity and further improving the reliability of the lock core. The solenoid valve, as the first driving mechanism, operates smoothly and quietly and can accurately push the limit bolt into the limit groove. The simple structure is also conducive to reducing the volume of the lock core and improving the applicability of the lock core.

Preferably, the top block is a metal block; the limit bolt is a metal bolt; the first driving mechanism includes a first power supply, and the first power supply is electrically connected to the top block.

The present invention can also energize the metal top block to generate magnetic force to suck the metal limit bolt into the limit groove. The use of magnetic force to drive the limit bolt is conducive to reducing the volume of the lock core and improving its applicability in existing door lock products.

The invention also provides a digital door lock, which contains the lock core.

When the lock core of the present invention is applied to a digital door lock, the mechanical lock core operated by the key core can be closed when the digital door lock is working normally to prevent it from being unlocked by technical means, thereby improving the safety of the digital door lock. Once the digital door lock fails such as a power outage, the lock core can be released, and the user can open the door lock by inserting a physical key. In addition, the mechanical lock core can also be in a normally open state. When an abnormal operation such as technical unlocking is detected, the lock core is closed to improve the safety of the door lock. The digital door lock of the present invention also includes necessary structures such as necessary data processing structures, secret key input structures, and door lock drive structures. Since they are not improvements of the present invention, the present invention will not be described in detail, and any existing technology can be selected for implementation.

Furthermore, it also includes a control unit and a detector, the detector is communicatively connected to the control unit, and the control unit is communicatively connected to the first driving mechanism.

The detector is used to detect the working status of the digital door lock. When an abnormal situation occurs in the digital door lock (the power supply cannot be supplied normally, abnormal operation occurs, etc.), the control unit can make a judgment and issue an instruction to close or open the lock cylinder, so that the first drive mechanism drives the limit bolt to insert/exit the limit slot. The type, quantity and structure of the detector can be set according to the state to be detected. For example, if the power supply situation needs to be detected, a current and voltage detector is set in the relevant circuit to detect the current and voltage values in the system to determine the power supply situation. The control unit can use any existing technology, such as a single-chip microcomputer.

Furthermore, a second clutch device is also provided at the front end of the top block; the end of the top block is connected to a second driving mechanism that drives it to rotate; the limiting assembly includes at least one annular limiting groove surrounding the side of the top block, and a limiting bolt arranged on the outside of the top block and matching the limiting groove, and also includes a first driving mechanism that drives the limiting bolt to insert/exit the limiting groove.

The present invention provides a second clutch device at the front end of the top block, and the second clutch device is transmission-connected to the sleeve. The second driving mechanism drives the second clutch device to rotate, which can drive the cam to rotate and open the door lock. The limit bolt can lock the top block in the sleeve, so when the second clutch device is used to control the door lock, the second clutch device can hinder the connection between the first clutch device and the sleeve, and the door lock can only be opened by inputting a key. The second driving mechanism can be implemented by any existing technology, such as a motor. It is communicatively connected with the control unit. The digital door lock and the mechanical door lock control the door lock through the same lock core, which is conducive to simplifying the structure of the door lock and realizing seamless switching between the two unlocking methods of inputting a key/inserting a key, which can effectively improve the working efficiency of the door lock and the reliability of the lock core sealing function.

Preferably, the second driving mechanism includes a motor and a second power supply for driving the motor; and the detector is used to detect the voltage and current of the second power supply.

The present invention also provides a method for closing a digital door lock, comprising the following steps:

S1. The detector detects the digital door lock signal and sends the detection result to the control unit;

S2. The control unit compares the detection value with the preset result. If the detection result is not within the preset result range, the control unit controls the first driving mechanism to drive the limit bolt to withdraw from the limit slot; if the detection result is within the preset result range, the control unit controls the first driving mechanism to drive the limit bolt to insert into the limit slot.

Furthermore, a second clutch device is provided at the front end of the top block; the end of the top block is connected to a second driving mechanism for driving it to rotate; the second driving mechanism includes a motor and a second power supply for driving the motor; the detector is used to detect the voltage and current of the second power supply; the signal is the voltage value and/or current value of the second power supply.

Furthermore, the signal is the length of time the key stays in the key core.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a closable lock core in a closed state according to the present invention.

FIG. 2 is a schematic structural diagram of the closable lock core of the present invention in an open state.

FIG. 3 is a schematic structural diagram of another embodiment of a closable lock core according to the present invention.

FIG. 4 is a schematic structural diagram of another embodiment of a closable lock core according to the present invention.

FIG. 5 is a schematic structural diagram of another embodiment of a closable lock core according to the present invention.

FIG6 is a structural block diagram of the digital door lock of the present invention.

FIG. 7 is a schematic structural diagram of another embodiment of a closable lock core according to the present invention.

FIG8 is a structural block diagram of another embodiment of the digital door lock of the present invention.

Detailed ways

In order to facilitate understanding by those skilled in the art, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

Example 1

This embodiment provides a closable lock core, as shown in FIG1 , comprising a cam for starting a lock bolt, a key core 1 arranged at one end of the cam, the cam comprising a sleeve 2 and an engaging portion (not shown in the figure), the engaging portion radially extending from the sleeve; the key core is coaxial with the sleeve, the end of the key core is connected to the sleeve through a first clutch device 3 extending into the sleeve, and further comprises a clutch locking assembly, the clutch locking assembly comprising a top block 41 slidably arranged in the sleeve, and a limit assembly for locking the top block position. The first clutch device is a prior art.

In this embodiment, the key core is an existing pin-and-tumble key core.

Furthermore, the front end of the top block 41 extends into the sleeve from the other end of the cam; the end of the top block is also connected to a reset mechanism 42; the limit assembly includes a limit groove 43 opened on the side of the top block and arranged along the radial direction of the top block, and a limit bolt 44 arranged on the outside of the top block and matching the limit groove, and also includes a first driving mechanism 45 that drives the limit bolt to insert/exit the limit groove. In this embodiment, the reset mechanism is preferably a reset spring.

Preferably, in this embodiment, the first driving mechanism is a double-coil electromagnetic valve; the valve core of the electromagnetic valve moves along the radial direction of the top block; and the limit bolt is fixed on the valve core.

The working principle of this embodiment is as follows: the solenoid valve is energized, and the valve core pushes the limit bolt into the limit groove, locking the top block in the sleeve to achieve the closure of the lock core (as shown in Figure 1). At this time, since the first clutch device cannot enter the sleeve and connect with it, it is impossible to drive the door lock by inserting the key into the key core.

When the lock core needs to be opened, the valve core drives the limit bolt to exit the limit groove (as shown in Figure 2). At this time, inserting the key can push the first clutch device into the sleeve and connect it with the sleeve. After the operation is completed, the reset spring pushes the first clutch device to exit the sleeve.

Example 2

The present embodiment provides a closable lock core, as shown in FIG3 , comprising a cam for starting a lock bolt, a key core 1 arranged at one end of the cam, the cam comprising a sleeve 2 and an engaging portion, the engaging portion radially extending from the sleeve; the key core is coaxial with the sleeve, the end of the key core is transmission-connected to the sleeve via a first clutch device 3 extending into the sleeve, and further comprises a clutch locking assembly, the clutch locking assembly comprising a top block 41 slidably disposed in the sleeve, and a limit assembly for locking the position of the top block.

In this embodiment, the key core is an existing leaf-type key core.

Furthermore, the front end of the top block extends into the sleeve from the other end of the cam; the end of the top block is also connected to a reset mechanism 42; the limit assembly includes a limit groove 43 opened on the side of the top block and arranged along the radial direction of the top block, and a limit bolt 44 arranged on the outside of the top block and matching the limit groove, and also includes a first driving mechanism 45 that drives the limit bolt to insert/exit the limit groove. In this embodiment, the reset mechanism is preferably a reset spring.

The top block is a metal block (steel); the limit bolt is a metal bolt (steel); the first driving mechanism includes a first power supply, and the first power supply is electrically connected to the top block.

Example 3

The present embodiment provides a closable lock core, as shown in FIG4 , comprising a cam for starting a lock bolt and a key core 1 arranged at one end of the cam, the cam comprising a sleeve 2 and an engaging portion, the engaging portion radially extending from the sleeve 2; the key core 1 is coaxial with the sleeve 2, the end of the key core 1 is transmission-connected to the sleeve 2 via a first clutch device 3 extending into the sleeve 2, and further comprising a clutch locking assembly, the clutch locking assembly comprising a top block 41 slidably disposed in the sleeve, and a limit assembly for locking the position of the top block.

In this embodiment, the key core is an existing pin-and-tumble key core.

Furthermore, the front end of the top block 41 extends into the sleeve 2 from the other end of the cam; the end of the top block is also connected to a reset mechanism 42; the limit assembly includes a limit groove 43 opened on the side of the top block and arranged along the radial direction of the top block, and a limit bolt 44 arranged on the outside of the top block 41 and matching the limit groove, and also includes a first driving mechanism for driving the limit bolt to insert/exit the limit groove. In this embodiment, the reset mechanism is preferably a reset spring.

In this embodiment, the first driving mechanism includes a motor 46 disposed outside the stop bolt and a screw rod 47 connected to the output end of the motor, a screw hole is provided at the end of the stop bolt, and the screw rod is matched with the screw hole. The motor drives the screw rod to rotate, thereby moving the stop bolt.

Example 4

The present embodiment provides a closable lock core, as shown in Figure 5, comprising a cam for starting a lock bolt and a key core 1 arranged at one end of the cam, the cam comprising a sleeve 2 and an engaging portion, the engaging portion radially extending from the sleeve 2; the key core 1 is coaxial with the sleeve 2, the end of the key core 1 is transmission-connected to the sleeve 2 via a first clutch device 3 extending into the sleeve 2, and further comprises a clutch locking assembly, the clutch locking assembly comprising a top block 41 slidably disposed in the sleeve, and a limit assembly for locking the position of the top block 41.

In this embodiment, the key core 1 is an existing pin and tumbler key core.

Furthermore, the front end of the top block 41 extends into the sleeve 2 from the other end of the cam; the end of the top block 41 is also connected to a reset mechanism 42; the limit assembly includes a limit groove 43 opened on the side of the top block 41, arranged along the radial direction of the top block, and surrounding the top block, and two limit bolts 44 arranged on the outside of the top block, matching the limit groove, and arranged oppositely, and also includes a first driving mechanism for driving the limit bolt to insert/exit the limit groove. In this embodiment, the reset mechanism is preferably a reset spring.

In the preferred embodiment, the first driving mechanism is a double-coil electromagnetic valve 45; the valve core of the electromagnetic valve moves along the radial direction of the top block; and the limit bolt is fixed on the valve core.

Example 5

This embodiment provides a digital door lock, which includes the lock core as described in Embodiment 1. As shown in FIG6 , it also includes a control unit and a detector, the detector is communicatively connected to the control unit, and the control unit is communicatively connected to the first driving mechanism.

Furthermore, the detector is arranged in the keyhole of the key core, and is used to detect the time the foreign object stays in the keyhole and/or the frequency of the foreign object swinging in the keyhole.

In this embodiment, the detector includes two contact switches arranged at the head and tail ends of the key hole of the key core.

Example 6

This embodiment provides a digital door lock, which includes a closable lock core.

In this embodiment, as shown in Figure 7, the closable lock core includes a cam for starting the lock bolt and a key core 1 arranged at one end of the cam, the cam includes a sleeve 2 and an engaging portion, and the engaging portion extends radially from the sleeve 2; the key core 1 is coaxial with the sleeve 2, and the end of the key core is transmission-connected to the sleeve 2 through a first clutch device 3 extending into the sleeve 2, and also includes a clutch locking assembly, which includes a top block 41 slidably arranged in the sleeve, and a limit assembly for locking the position of the top block 41.

The front end of the top block 41 extends into the sleeve from the other end of the cam; the end of the top block is also connected to a reset mechanism 42; the limiting assembly includes an annular limiting groove 43 surrounding the side of the top block, and a limiting bolt 44 arranged on the outside of the top block and matching the limiting groove, and also includes a first driving mechanism for driving the limiting bolt to insert/exit the limiting groove.

Furthermore, the first driving mechanism is a double-coil electromagnetic valve 45; the valve core of the electromagnetic valve moves along the radial direction of the top block; and the limit bolt is fixed on the valve core.

In this embodiment, as shown in FIG8 , the digital door lock further includes a control unit, a detector, and a secret key input module, the detector is connected to the control unit in communication, and the control unit is connected to the first driving mechanism in communication. The secret key input module is a numeric keyboard.

Furthermore, the front end of the top block 41 is provided with a second clutch device 5; the end of the top block 41 is connected to a second driving mechanism (not shown) for driving the top block 41 to rotate. In this embodiment, the second driving mechanism is a motor, which is connected to the control unit for communication.

The second driving mechanism also includes a second power supply for driving the motor; the detector is a prior art device for detecting the voltage and current of the second power supply.

Example 7

This embodiment provides a method for closing the lock core of a digital door lock according to Embodiment 5. The method comprises the following steps:

S1. The detector detects the time interval between the key touching the two contact switches and sends the detection result to the control unit;

S2. The control unit compares the detection value with the preset result. If the detection result exceeds the preset time range (set to 1 second in this embodiment), the control unit controls the first driving mechanism to drive the limit bolt out of the limit slot; push the key to connect the first clutch device to the sleeve, and rotate the key to open the door lock. If the detection result is within the preset result range, the control unit controls the first driving mechanism to drive the limit bolt into the limit slot; close the lock core, and the door lock cannot be opened.

In addition, the contact switch in S1 can also be used to detect the frequency at which it is triggered by foreign objects to obtain the frequency of the swing (vibration) of the foreign object in the keyhole. If the result is higher than the preset value, the door lock can be controlled to be closed to prevent the door lock from being cracked by technical unlocking.

Example 8

This embodiment provides a method for closing the lock core of a digital door lock according to Embodiment 5. The method comprises the following steps:

S1. The detector detects the time interval between the key touching the two contact switches and sends the detection result to the control unit;

S2. The control unit compares the detection value with the preset result. If the detection result exceeds the preset time range (set to 1 second in this embodiment), the control unit controls the first driving mechanism to drive the limit bolt to exit the limit groove; push the key to connect the first clutch device to the sleeve, and rotate the key to open the door lock. If the detection result is within the preset result range, the control unit controls to maintain the state of the closed lock core, and the door lock cannot be opened.

Preferably, this embodiment further includes the step of, when a first contact switch close to the keyhole opening is triggered, the control unit controlling the first driving mechanism to drive the limiting bolt to insert into the limiting groove.

Example 9

This embodiment provides a method for closing the lock core of a digital door lock according to Embodiment 6. The method comprises the following steps:

S1. The detector detects the digital door lock signal and sends the detection result to the control unit;

S2. The control unit compares the detection value with the preset result. If the detection result is not within the preset result range, the control unit controls the first driving mechanism to drive the limit bolt to withdraw from the limit slot; if the detection result is within the preset result range, the control unit controls the first driving mechanism to drive the limit bolt to insert into the limit slot.

Furthermore, the signal is a voltage value and a current value of the second power supply.

In this embodiment, the preset result is lower than the normal working current and voltage of the motor. When the current value and voltage value of the second power supply are within the set range (that is, when the second power supply cannot drive the motor to work normally), the lock cylinder is unlocked and the door lock can be opened with the key. When the detection value is outside the set range, the door lock is locked and the user can only open the door lock by entering the secret key.

The above is a specific implementation of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and these obvious replacement forms all belong to the protection scope of the present invention.

Claims (7)

1. A lock core that can be closed, comprising a cam for starting a lock bolt, a key core arranged at one end of the cam, the cam comprising a sleeve and an engaging portion, the engaging portion radially extending from the sleeve; the key core is coaxial with the sleeve, the end of the key core is connected to the sleeve through a first clutch device extending into the sleeve, characterized in that: it also includes a clutch locking assembly, the clutch locking assembly includes a top block slidably arranged in the sleeve, and a limit assembly for locking the position of the top block; The front end of the top block extends into the sleeve from the other end of the cam; the end of the top block is also connected to a reset mechanism; the limit assembly includes at least one limit groove opened on the side of the top block and arranged radially along the top block, and a limit bolt arranged on the outside of the top block and matching the limit groove, and also includes a first driving mechanism for driving the limit bolt to insert into/withdraw from the limit groove; The first driving mechanism is a double-coil electromagnetic valve; the valve core of the electromagnetic valve moves along the radial direction of the top block; the limit bolt is fixed on the valve core; The top block is a metal block; the limit bolt is a metal bolt; the first driving mechanism includes a first power supply, and the first power supply is electrically connected to the top block. 2. A digital door lock, characterized in that it contains the lock core as claimed in claim 1. 3. The digital door lock according to claim 2 is characterized in that it also includes a control unit and a detector, the detector is communicatively connected to the control unit, and the control unit is communicatively connected to the first driving mechanism. 4. The digital door lock according to claim 3 is characterized in that: a second clutch device is also provided at the front end of the top block; the end of the top block is connected to a second driving mechanism that drives it to rotate; the limiting assembly includes at least one annular limiting groove surrounding the side of the top block, and a limiting bolt arranged on the outside of the top block and matching the limiting groove, and also includes a first driving mechanism that drives the limiting bolt to insert/exit the limiting groove. 5. The digital door lock according to claim 4 is characterized in that: the second driving mechanism includes a motor and a second power supply for driving the motor; and the detector is used to detect the voltage and current of the second power supply. 6. A method for closing a digital door lock according to any one of claims 2 to 5, comprising the following steps: S1. The detector detects the digital door lock signal and sends the detection result to the control unit; S2. The control unit compares the detection value with the preset result. If the detection result is not within the preset result range, the control unit controls the first driving mechanism to drive the limit bolt to withdraw from the limit slot; if the detection result is within the preset result range, the control unit controls the first driving mechanism to drive the limit bolt to insert into the limit slot. 7. The closing method of a digital door lock according to claim 6 is characterized in that: a second clutch device is also provided at the front end of the top block; the end of the top block is connected to a second driving mechanism that drives the second clutch device to rotate; the second driving mechanism includes a motor and a second power supply for driving the motor; the detector is used to detect the voltage and current of the second power supply; the signal is the voltage value and/or current value of the second power supply.