KR20100107663A - Digital door lock with enhanced security and method of releasing the same - Google Patents

Abstract

PURPOSE: A digital door-lock with the enhanced security and a method for releasing the same are provided to prevent the release of the digital door-lock due to external intrusion by complicating releasing conditions for the digital door-lock. CONSTITUTION: A driving motor(308) drives a dead bolt. A controller(218) controls the driving motor. The controller determines a releasing condition using a combination of at least two releasing inputs. If the releasing condition is satisfied, the controller drives the driving motor and release a digital door-lock.

Description

Digital door lock with enhanced security and method of releasing the same}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital door lock device. In particular, the digital door lock is unlocked by at least two unlocking inputs, thereby preventing the digital door lock from being released by external intrusion, and thus improving the security function. It is about a method.

 In general, the digital door lock device is installed in the doors of various buildings, and includes an outer assembly installed outside the door, an inner assembly installed inside the door, and a mortise. The outer assembly has a keypad for keying the user, which is covered by a sliding cover. The sliding cover generally has a structure capable of sliding in the vertical direction, and the keypad is exposed to the outside when the sliding cover slides upward. Mortis has a dead bolt for locking and unlocking the door and a motor for driving the dead bolt. Mortis can be installed on the inner side of the door or on a part adjacent to the wall in the door. The inner assembly is provided with buttons for moving the mortis to lock and unlock the door.

The digital door lock device provides a strict access control function compared to the conventional mechanical door lock, and provides a high security by having access authentication means such as a keypad for inputting a password, a fingerprint reader, a card reader, and the like. On the other hand, the user can easily unlock the digital door lock by pressing a button or touching the portable personal identification unit to the digital door lock, thereby increasing user convenience.

However, crimes that exploit the convenience of such digital door locks have recently increased. In particular, by inserting a wire going through the hole by drilling a hole in the iron door, using the inserted wire to increase the crime of easily unlocking the digital door lock by pressing the unlock button located on the digital door lock body inside the door. Preventing these crimes is not easy for two reasons. First of all, the drilling of the steel door with a drill is made in a very short time. In particular, as the performance of the personal tool is developed and widely distributed, anyone can drill holes easily. The second is that it is not easy to know the intrusion because it is easy to cover the hole with a sticker even after committing a crime, because a small hole enough to insert a thin wire can be used for a crime. As such, it can be said that the conventional digital door lock is almost defenselessly exposed to crime which exploits the advantages of the digital door lock developed for the convenience of the user.

Therefore, there is an urgent need for the development of a digital door lock that can effectively cope with the crime of unlocking the digital door lock by forcibly destroying the iron door from the outside or by drilling a hole in the iron door and pressing the release button of the inner digital door lock body.

It is an object of the present invention to provide a digital door lock which is not easily unlocked by using such a tool even if a small tool is drilled out of the steel door by force from the outside.

An object of the present invention is to set the unlocking conditions so that the digital door lock is unlocked only when at least two unlocking inputs exist at the same time, thereby preventing the forced unlocking of the digital door lock, as well as protecting the valuable life and property. To provide.

One aspect of the present invention for achieving the above object, relates to a digital door lock including a drive motor for driving a dead bolt and a control unit for controlling the drive motor, the control unit is a combination of at least two unlocking input conditions unlock conditions; Determining and unlocking the digital door lock by driving the drive motor when all the unlocking conditions are satisfied. In particular, the digital door lock according to one aspect of the present invention includes a sensor for detecting human body approach and a switch switched by the user, and the unlocking condition may be a combination of a sensor input of the sensor and a switch input of the switch. Alternatively, the digital door lock according to one aspect of the present invention includes at least two switches, and the unlocking condition may be a combination of switch inputs of the switches. Alternatively, the digital door lock according to one aspect of the present invention provides a low frequency antenna for transmitting a low frequency (LF) signal to a portable personal identification unit, a radio frequency antenna for receiving a radio frequency (RF) signal from the portable personal identification unit, and a user. And a switch switched by the control unit, wherein the control unit authenticates the portable personal identification unit according to a predetermined authentication mechanism when the radio frequency signal is received, and the unlock condition is the input of the radio frequency signal input and the user received from the authenticated portable personal identification unit. It can be a combination of switch inputs. Preferably, the portable personal identification unit is characterized in that the hardware smart key is embedded with a predetermined authentication mechanism.

According to another aspect of the present invention for achieving the above objects, determining a unlocking condition as a combination of at least two unlocking input, receiving at least one unlocking input of the unlocking condition, receiving at least one unlocking input If it is detected, determining whether the remaining unlocking inputs are received, and if the unlocking conditions are satisfied, the digital door lock unlocking comprising the step of unlocking the digital door lock by driving the motor driving unit for driving the dead bolt of the digital door lock It is about a method. In particular, the unlock condition is characterized in that the combination of the sensor input and the user's switch input for detecting the approach of the human body. Preferably, the unlock condition is a combination of switch inputs of at least two switches. Alternatively, the unlock condition is a combination of a sensor input for detecting the access of the authenticated portable personal identification unit and a switch input of the user, wherein the portable personal identification unit is a hardware smart key in which a predetermined authentication mechanism is embedded.

According to the present invention, since the digital door lock can be unlocked only when at least two unlocking inputs exist at the same time, the digital door lock can no longer be easily unlocked by a coarse device such as a thin wire as in the related art. Therefore, it is possible to protect valuable life and property by the present invention.

The above and other objects, features and effects of the present invention will become apparent from the following detailed description of the invention with reference to the accompanying drawings.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In addition, in order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals in the drawings indicate the same members.

Throughout the specification, when a part is said to "include" a certain component, it means that it may further include other components, without excluding the other components unless otherwise stated. In addition, the terms "... unit", "... unit", "module", "block", etc. described in the specification mean a unit for processing at least one function or operation, which means hardware, software, or hardware. And software can be implemented.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart illustrating a digital door lock release method according to an embodiment of the present invention.

The digital door lock unlocking method according to the present invention determines that the unlock condition is satisfied only when at least two unlock inputs are received at once. Therefore, since only one button input can prevent the digital door lock from being unlocked as in the related art, the security of the digital door lock is improved.

First, a unlocking condition consisting of at least two unlocking inputs is determined (S110). In the present specification, the unlock input indicates an input signal input for unlocking the digital door lock. For example, the unlock input includes a button input when the unlock button is pressed, a sensor input of a proximity sensor indicating that a person is close to the digital door lock, a sensor input of a touch sensor having an impedance that changes according to human contact, and a smart key. Sensor input indicating that the portable personal identification unit, such as an access to the digital door lock, may be included. In addition, in the present specification, the unlock condition is a condition for unlocking the digital door lock and includes at least two unlock inputs. For example, the unlock condition may be a case where both a sensor input of a touch sensor and a button input of a unlock button are received. Alternatively, the unlock condition may be when both a sensor input indicating that the portable personal identification unit is in proximity and a button input of the unlock button are received. Various unlocking conditions will be described later in detail with reference to FIG. 4.

When the unlock condition is determined, the device waits until the unlock input is received (S120). When one of the unlock inputs is received, it is determined whether the received unlock inputs satisfy one of the predetermined unlock conditions (S130). If one of the unlock conditions is satisfied, the other unlock input of the unlock condition is received (S140). On the other hand, if the received unlock input does not satisfy the predetermined unlock condition, it returns to receiving another unlock input again. When another unlock input is received, it is determined whether the received unlock input satisfies all remaining unlock conditions (S150). If it is determined that all unlocking conditions are satisfied at the same time, the digital door lock is released (S160). On the other hand, if all of the unlock conditions are not satisfied, the process returns to the beginning and receives the unlock input.

As shown in Fig. 1, the digital door lock release method according to the present invention allows the digital door lock to be released only when at least two unlock inputs are satisfied at the same time. Therefore, it is difficult to forcibly break the iron door from outside and release the digital door lock. The reason is that even if a thin wire enters through a narrow hole drilled using a drill, only one button input can be generated, and several unlock inputs cannot be generated at the same time. Therefore, by using the digital door lock release method according to the present invention, the digital door lock can be effectively prevented from being forcibly released by a criminal, thereby improving security.

2 is a block diagram conceptually showing a digital door lock according to another aspect of the present invention.

The digital door lock shown in FIG. 2 can be used with a portable personal identification unit. 2 shows a smart key as an example of a portable personal identification unit. The digital door lock shown in FIG. 2 includes a front unit 10, a main unit 20, and a motor 308. The front unit 10 is provided in an outer assembly installed outside the door, and the main unit 20 is provided in an inner assembly installed inside the door.

The front unit 10 includes a low frequency antenna 102, a reset switch 104, a light emitting diode (LED) unit 106, an operation mode setting unit 108, a keypad 110 for key input, and a radio frequency (RF). ) An antenna 112. The low frequency antenna 102 is used to generate a low frequency electromagnetic wave signal and is driven by the low frequency antenna driver 204. The LED unit 106 may light LEDs (not shown) when a key on the operation mode setting unit 108 or the keypad 110 is pressed. The operation mode setting unit 108 is selectively provided to selectively activate various functions of the digital door lock. For example, if the digital door lock operates in the manual mode, when the user touches the keypad 110, the digital door lock starts a search operation of the smart key.

The low frequency antenna 102 is fixed to the inner surface of the sliding cover which constitutes the outer assembly. The low frequency antenna 102 may be implemented by a ferrite antenna and may generate a low frequency signal of 134.2 kHz, for example. In general, the low frequency antenna 102 has an effective transmission distance of 0.7 m to 1 m.

The radio frequency (RF) antenna 112 may be a helical antenna. For example, the radio frequency antenna 112 may be implemented to transmit and receive data at a frequency of about 315 MHz. The front unit 10 also has terminals 116 for emergency power of 9V. The emergency power terminals 116 are terminals for enabling the external battery to be used to temporarily operate the digital door lock in a situation where the internal battery of the digital door lock cannot supply the device operating power by a complete discharge or the like.

The main unit 20 includes a power management unit 202, a low frequency antenna driver 204, an RF receiver 206, a touch sensor SENSOR, a push button PUSH, first and second switches SW1 and SW2, and an internal unit. A forced lock switch 212, a buzzer 214, a motor driver 216, and a controller 218 are provided. The power management unit 202 to which the DC 6V battery 220 is connected provides power required by the digital door lock. Alternatively, the power manager 202 may receive DC power directly from the outside to provide operating power. For example, when 220V commercial power is received from the outside, the power manager 202 may convert this into a 6V operating power and provide the same to the components of the digital door lock.

The low frequency antenna driver 204 is used to drive the low frequency antenna 102 of the front unit 10. The RF receiver 206 processes the RF signal received through the helical antenna 112 of the front unit 10 and converts the RF signal into a signal that can be processed by the controller 218. The buzzer 214 is used to soundly indicate the operating state of the digital door lock. The motor driver 216 drives the motor 308 to lock or open the door. Each component constituting the main unit 20 is connected to the control unit 218 and performs its functions under the control of the control unit 218.

The digital door lock shown in FIG. 2 includes a touch sensor SENSOR, a push button PUSH, and first and second switches SW1 and SW2, and users may use them to generate unlock inputs. The touch sensors, push buttons and switches shown in FIG. 2 are not necessarily created to be separated from each other. Rather, one button can perform both the functions as a touch sensor and a push button. This will be described later in detail with reference to FIG. 3A.

The controller 218 shown in FIG. 2 drives the motor driver 216 only when there are at least two of the unlock sensors received from the touch sensor, the push button, the first and second buttons, and the smart key. In order that the tool forcibly inserted from the outside cannot simultaneously generate unlocking inputs, the first and second switches SW1 and SW2 shown in FIG. 2 are preferably spaced apart from each other to some extent.

In FIG. 2, when the smart key 40 is close to the digital door lock, the LF challenge signal transmitted from the LF antenna 102 is received by the MCU (not shown) of the smart key 40. The MCU then recognizes the LF challenge signal, generates an RF confirmation signal, and sends it to the digital door lock. In addition, when the KEY ID request signal is received from the digital door lock, the MCU determines whether the KEY ID included in the received KEY ID request signal is the same as the internally stored KEY ID. If the same, the MCU encrypts its KEY ID to generate a KEY ID response signal. The MCU then sends a KEY ID response signal to the digital door lock. Through this process, the smart key 40 can be authenticated. If the smart key 40 thus authenticated is present near the digital door lock, this means that the user is present near the digital door lock. Therefore, in this case, even if only the unlock inputs of the touch sensor SENSOR, the push button PUSH, and the first and second switches SW1 and SW2, the unlock input is not generated by the intruder or criminal. Able to know. Therefore, a sensor input indicating that the smart key 40 exists adjacent to the digital door lock can also be treated as a unlock input. For example, the KEY ID response signal received from the smart key 40 can be treated as a unlock input.

3A is a diagram conceptually illustrating an embodiment of a push button with a human body sensing function included in the digital door lock shown in FIG. 2.

Push button 310 of FIG. 3 is connected to switch 350 and sensor 370. A spring 330 is present between the push button 310 and the switch 350 to return to the original state after the push button 310 is pressed.

When the human body contacts the push button 310, the push button 310 contacts the switch 350 by pressing the push button 310. Therefore, the push signal PUSH, which is one of the unlock inputs, is generated from the switch 350. In addition, when the human body contacts the push button 310, the impedance of the human body is transmitted to the touch sensor 370 through the spring 330. Accordingly, the touch sensor 370 generates a touch signal SENSOR indicating the contact of the human body.

As shown in FIG. 3, the push button for generating a release input for unlocking the digital door lock according to the present invention may be integrated with a touch sensor. In this case, even if the push button is pressed using a wire or the like from the outside, the digital door lock is not released because the human body does not directly touch.

3B is a diagram illustrating an operating condition of the push button shown in FIG. 3A. Referring to FIG. 3B, it can be seen that the motor output does not occur when only one of the push signal PUSH and the touch signal SENSOR is activated. Only when both the push signal PUSH and the touch signal SENSOR are activated at the same time, the motor can be driven. This means that the digital door lock is released only when a person presses the push button directly inside the door. Therefore, in order to unlock the digital door lock, a hole having a size into which a wire or the like can be inserted is insufficient, and at least a human hand must be unlocked to a size sufficient to directly penetrate the steel door. Therefore, it takes a long time to make a hole in the iron door, and a lot of noise is generated in the process, so that criminal attempts can be made early.

4 is a diagram illustrating a unlocking condition for unlocking the digital door lock according to the present invention.

SENSOR illustrated in FIG. 4 represents a touch signal of a touch sensor, and PUSH represents a sensor signal of a push button. In addition, SW1 and SW2 represent signals of the first and second switches, and FOB represent sensor signals indicating that a portable personal identification unit such as a smart key is close to the digital door lock.

Referring to FIG. 4, the conditions under which the digital door lock is released include (SENSOR, PUSH), (PUSH, SENSOR), (SW1, SW2), (FOB, SENSOR), (FOB, PUSH), (FOB, SW1) and It can be seen that (FOB, SW2). However, this is to facilitate the understanding of the present invention, which does not limit the present invention. For example, the unlocking condition may be (SENSOR, PUSH, SW1) or (FOB, SW1, SW2). The first unlock condition refers to the case where the touch sensor, the push button, and the first switch are activated simultaneously, and the second unlock condition refers to the case where both the first and second switches are activated while the FOB is close to the digital door lock. . Therefore, it should be understood that FIG. 4 is not intended to limit the present invention, but is provided by way of example to assist in understanding the present invention. The more the unlock condition includes multiple unlock inputs, the more secure the digital door lock is.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible.

Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

The present invention is applied to the digital door lock, thereby preventing the digital door lock from being released by external intrusion, and thus can be applied to the digital door lock with improved security level, which can protect not only life but also property.

1 is a flowchart illustrating a digital door lock release method according to an embodiment of the present invention.

2 is a block diagram conceptually showing a digital door lock according to another aspect of the present invention.

3A is a diagram conceptually illustrating an embodiment of a push button with a human body sensing function included in the digital door lock shown in FIG. 2.

3B is a diagram illustrating an operating condition of the push button shown in FIG. 3A.

4 is a diagram illustrating a unlocking condition for unlocking the digital door lock according to the present invention.

Claims (10)

In the digital door lock release method, Determining a unlock condition as a combination of at least two unlock inputs; Receiving at least one unlock input of the unlock conditions; If reception of at least one unlock input is detected, determining whether remaining unlock inputs are received; And And unlocking the digital door lock by driving a motor driving unit driving the dead bolt of the digital door lock when all of the unlocking conditions are satisfied. The method of claim 1, wherein the release condition is, Digital door lock release method characterized in that the combination of the sensor input and the user's switch input for detecting the approach of the human body. The method of claim 1, wherein the release condition is, Digital door lock release method characterized in that the combination of the switch inputs of at least two switches. The method of claim 1, wherein the release condition is, A digital door lock release method, characterized in that the combination of the sensor input and the user's switch input for detecting the access of the authenticated portable personal identification unit. The portable personal identification unit of claim 4, wherein Is a hardware smart key with a built-in authentication mechanism, And the digital door lock authenticates the hardware smart key using the authentication mechanism. In the digital door lock, A drive motor for driving dead bolts and A control unit for controlling the drive motor, wherein the control unit, Determine a unlock condition as a combination of at least two unlock inputs, And unlocking the digital door lock by driving the driving motor when all of the unlocking conditions are satisfied. The method of claim 6, wherein the digital door lock, It includes a sensor for detecting the human body approach and the switch switched by the user, the unlocking condition, And a sensor input of the sensor and a switch input of the switch. The method of claim 6, The digital door lock comprises at least two switches, And said unlock condition is a combination of switch inputs of said switches. The method of claim 6, wherein the digital door lock, A low frequency antenna for transmitting a low frequency (LF) signal to a portable personal identification unit; A radio frequency antenna for receiving radio frequency (RF) signals from the portable personal identification unit; And Includes a switch that is switched by the user, The control unit authenticates the portable personal identification unit according to a predetermined authentication mechanism when the radio frequency signal is received. And a user's switch input and the radio frequency signal input received from the authenticated portable personal identification unit. The portable personal identification unit of claim 9, wherein A digital door lock, characterized in that the hardware smart key with a predetermined authentication mechanism.

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