KR102132937B1 - Touch type digital lock - Google Patents

Abstract

The present invention relates to a touch type digital lock. Since the touch type digital lock includes an operation switch unit in a fingerprint input unit of an external input device and, in particular, includes two or more conductive film electrodes on the top of a cover glass or two or more conductive light shielding films on an inner wall of a cylindrical glass tube, respectively, there is an effect that can be operated regardless of day or night.

Description

Touch type digital lock {TOUCH TYPE DIGITAL LOCK}

The present invention relates to a lock device, and more particularly, to a touch-type digital lock device that can be used in a drawer, a display case, a wardrobe, and a storage cabinet.

Conventionally, locks used in drawers, showcases, wardrobes, and storage cabinets (hereinafter referred to as'storage cabinets', etc.) have relied mainly on mechanical methods of built-in locks and portable keys. As a result, not only is there a fear of losing the key, there has been the inconvenience of carrying the key all the time.

The door lock has recently changed to a digital method, but in the cabinet, the mechanical method is still common. It is difficult to employ digital door locks in small drawers or personal lockers. In particular, whenever opening and closing a cabinet or the like used at any time, as disclosed in Korean Patent Publication No. 10-2019-0122460, it is impractical to use an optical fingerprint input device via a mobile phone. In addition, although the optical fingerprint input device employed in the above patent document can be made thin, since it uses total reflection on the side, it has to have a certain area, and it is difficult to employ it in a locking device such as a small drawer.

In order to solve the above problems, the applicant has developed a vertically total reflection type optical fingerprint input device and received a patent as Korean Patent No. 10-2091858.

However, as an example of the patent, the light blocking member is provided with one or more light receiving sensors toward the cover glass, and a finger is placed on the cover glass to obtain a fingerprint image, thereby controlling the operation of the light source by blocking external light into the cylindrical optical member. When it is done, there is a problem that it is difficult to operate at night.

The present invention has been proposed to solve the above problems, and an object of the present invention is to provide a digital lock device having an operation switch means in a fingerprint input unit and capable of operating regardless of day or night.

In order to achieve the above object, the digital locking device according to the present invention is provided with an external input device and an internal locking device which are fastened facing each other from the outside and the inside, with one wall between the objects to be installed. Is provided with a fingerprint input unit having an operation switch means, the inner lock has a dead bolt operation unit, an internal power supply unit, a storage unit and a central processing unit, the fingerprint input unit is a cover glass; A cylindrical optical member supporting the cover glass and totally reflecting down; A light source provided inside the cylindrical optical member; A solid-state imaging device disposed under the light source and receiving light totally reflected by the cylindrical optical member to obtain image information of a fingerprint; And an image processing device for processing the image information obtained by the solid-state imaging device so as to be contrasted with a fingerprint stored in the storage unit.

The operation switch means includes at least two conductive film electrodes disposed at regular intervals with a transmissive through hole of the light source on the top of the cover glass, and a control circuit connected to the conductive film electrode to control the operation of the light source. It is configured as another feature of the digital lock according to the present invention.

The conductive film electrode is a ring shape disposed on the edge of the cover glass as the first and second electrodes, and the control circuit is connected to the first electrode having a supply power terminal (Vcc) provided from the internal power supply. The second electrode is connected to the base of the npn-type first transistor, the collector of the first transistor is connected to the supply power terminal Vcc past a first resistor, and the emitter of the first transistor is grounded after a second resistor. Terminal, the collector of the first transistor is connected to the base of the second transistor of the pnp type past the third resistor, the emitter of the second transistor is connected to the supply power terminal Vcc, and the second transistor Another feature of the digital lock according to the present invention is that the collector of the first resistor is connected to the ground terminal after passing through the light source, and a capacitor is connected between the collector and the ground terminal of the first transistor.

The cylindrical optical member is a cylindrical glass tube having the same refractive index as the cover glass, and another feature of the digital locking device according to the present invention is that a light shielding film is further attached to the inner wall of the cylindrical glass tube.

The cylindrical optical member is a cylindrical glass tube having the same refractive index as the cover glass, and the operation switch means recognizes changes in capacitors of two or more conductive light-shielding films and the conductive light-shielding films provided on the inner wall of the cylindrical glass tube to operate the light source. Another feature of the digital lock according to the present invention is configured to include a control circuit for controlling the.

Another feature of the digital locking device according to the present invention is that the lower portion of the cylindrical optical member has an optical output surface inclined at a predetermined angle inward.

The digital locking device of the present invention is provided with an operation switch means on the fingerprint input unit of the external input device, and is provided with two or more conductive light-shielding films on the inner wall of the cylindrical glass tube or two or more conductive film electrodes on the cover glass, respectively. There is an effect that can be operated regardless.

1 is an exploded perspective view of a digital lock according to an embodiment of the present invention.
FIG. 2 is a block diagram showing the electrical configuration of FIG. 1.
3 is a conceptual diagram showing an embodiment of the configuration of the fingerprint input unit of FIG. 1.
FIG. 4 is a perspective view of part of the configuration of FIG. 3.
5 is a conceptual diagram showing another embodiment of the configuration of the fingerprint input unit of FIG. 1.
6 is a control circuit diagram connected between the conductive film electrode of FIG. 3 and a light source.
FIG. 7 is an operation flowchart for the central processing unit of FIG. 2.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The digital locking device according to an embodiment of the present invention, as shown in FIG. 1, has an outer input device 10 and an inner locking device (fastened facing each other from the outside and the inside) with one wall of the object 1 interposed therebetween. 20) is provided.

Here, the outer input device 10 includes a fingerprint input unit 12 having an operation switch means in front of the outer input case 11, and penetrates and inserts one wall of the object 1 to the rear. It may have two or more protruding fasteners (16, 18). According to an embodiment, a USB port 13 that can fit one or more of a master key 15, an auxiliary battery 17, and a portable terminal (not shown) on the front or one side of the outer input case 11 is further provided. Can be.

In addition, the edge of the fingerprint input unit 12 is further provided with a status indicator (12a), it is possible to emit light set in the status indicator (12a) when the fingerprint contact. In addition, an alarm output unit is also provided, so that a corresponding sound or the like can be made according to whether the fingerprint matches.

The inner locking device 20 has an inner locking case 21 in which a plurality of fastening holes 22 and 24 are formed at positions corresponding to the two or more protruding fasteners 16 and 18.

Referring to FIG. 2, the inner lock case 21 includes a dead bolt operation unit 150, an internal power supply unit 160, a storage unit 180, and a central processing unit 100 as an inner lock unit 20. It can be divided into a body case and a battery case provided. In addition, the outer input case 11, the central processing unit 100 and the microcomputer for each operation of the fingerprint input unit (12, 110) and the USB port (13) electrically connected via a predetermined connection terminal (28) A microcontroller unit (MCU) may be further provided.

Of the plurality of fastening holes 22 and 24, at least one upper screw 23 is formed in the fastening hole 22 formed in the body case, and at least one lower screw 25 is formed in the fastening hole 24 formed in the battery case. Each is inserted to fasten to one of the protruding fasteners 16 and 18, and the lower screw 25 may be provided to be covered by a cover 29 of the battery case. The battery case may be provided as a space for two or four batteries, as well as three batteries 27, and a deadbolt 26 is provided at one side of the body case.

The fingerprint input unit (12, 200), as referred to with reference to Figures 3 and 4, the cover glass 210; A cylindrical optical member 220 supporting the cover glass and totally reflecting downward; A light source 232 provided inside the cylindrical optical member; A solid-state imaging device (CCD, 250) disposed under the light source to obtain image information of a fingerprint by receiving light totally reflected by the cylindrical optical member 220; And an image processing device 260 for processing image information obtained by the solid-state imaging device to be contrasted with a fingerprint stored in the storage unit 180.

As described above, since the fingerprint input unit 12 is composed of the cover glass 210 and the cylindrical optical member 220, light from the light source 232 protrudes from the lower portion of the finger 2 placed on the cover glass 210. Reflected by the fingerprint 3, it is again incident on the cover glass 210. Light incident at an angle greater than a predetermined incident angle (α, critical angle) is totally reflected within the cover glass 210 and spreads out to the side. At this time, the light incident on the edge of the cylindrical optical member 220 supporting the cover glass 210 is totally reflected in the same way and spreads downward, and the solid-state imaging device (CCD, 250) disposed under the light source 232 Entering to obtain the image information of the fingerprint (3). Therefore, when water or a foreign substance is put on the fingerprint, the refractive index of the reflected light is changed, and not only has an effect of filtering through total reflection, but also a fingerprint image is obtained with light totally reflected down within the frame of the cylindrical optical member 220. There is an advantage in that the fingerprint input unit 12 can be installed even in a storage cabinet having space.

More specifically, as shown in the embodiment 200 of FIGS. 3 and 4, the cylindrical optical member 220 may be a cylindrical glass tube having the same refractive index and a predetermined thickness (t) as the cover glass 210. In addition, it is preferable that the lower portion of the cylindrical glass tube 220 has an optical output surface 222 inclined at a predetermined angle β. At this time, the inner inclination angle β of the light output surface 222 may be determined in consideration of the refractive index of the light from the light source 232 and the position of the solid state imaging devices CCD 250, etc. have.

According to an embodiment, as shown in FIG. 3, a condensing means such as a convex lens 240 may be further provided between the cylindrical glass tube 220 and the solid-state imaging devices CCD 250.

In addition, the light source 232 is provided on the light blocking member 230 fitted inside the cylindrical optical member 220, as in the embodiment 200 of FIGS. 3 and 4, the cylindrical optical member 220 It is preferable to block refracting light or the like transmitted to the bottom without total reflection within the frame.

The on/off control of the light source 232 is directly performed by the operation switch means provided in the fingerprint input unit 220, and thus has an effect of operating regardless of day or night. Here, the operation switch means can be implemented in various ways, but when the user wants to input a fingerprint with a finger, it is preferable that the light source 232 is configured to be turned on by detecting it. Hereinafter, with reference to FIGS. 3 to 6, a specific embodiment of the operation switch means will be described.

In one embodiment of the operation switch means, as shown in FIGS. 3, 4 and 6, two or more of the light-transmitting through-holes 212c of the light source are disposed on the upper side of the cover glass 210 at a predetermined interval. Conductive film electrodes 212 (212a, 212b) and the conductive film electrode may be configured to include a control circuit 214 that controls the operation of the light source 232.

The conductive film electrode 212 is preferably printed thinly with two or more electrodes on the top of the cover glass with conductive particles, preferably silver (Ag) nanoparticles having a particle size of 50 to 200 nm (resistivity 3 to 7 μΩcm). .

The conductive film electrode 212 may have various forms printed on the top of the cover glass 210, but as shown in FIGS. 3 and 4, the cover glass 210 is used as the first and second electrodes 212a and 212b. The ring shape disposed on the edge of the is preferred. By doing this, as shown in FIG. 4, when the user wants to input a fingerprint with the finger 2, the light source 232 is turned on immediately by touching the ring-shaped first and second electrodes 212a and 212b, The light by the light source may pass through the light-transmitting through hole 212c to recognize the fingerprint.

Here, the distance between the first and second electrodes 212a and 212b is sufficient to be electrically insulated and smaller than a typical finger size. This is because the light source 232 is turned on by the resistance of the finger by connecting the first and second electrodes 212a and 212b with the finger 2.

When the control circuit 214 connects the first and second electrodes 212a and 212b with a finger resistor, the control circuit 214 may recognize this and configure the light source 232 to be turned on with supply power provided from the internal power supply 160. The control circuit for this may also be variously configured, but it is desirable to minimize the transistor used, as shown in FIG. 6.

That is, the first electrode 212a is connected to the supply power terminal Vcc provided from the internal power supply unit 160, and the second electrode 212b is the base B of the npn-type first transistor TR1. , The collector C of the first transistor TR1 is connected to the supply power terminal Vcc through a first resistor R1, and the emitter E of the first transistor TR1 is connected to It is connected to the ground terminal after the second resistor R2, and the collector C of the first transistor TR1 is connected to the base B of the second transistor TR2 of the pnp type through the third resistor R3. The emitter E of the second transistor TR2 is connected to the supply power terminal Vcc, and the collector C of the second transistor TR2 includes a fourth resistor R4 and the light source ( 232) and connected to a ground terminal, and a capacitor C may be connected between the collector C and the ground terminal of the first transistor TR1.

Here, the first resistor R1 has a resistance lower than that of the finger. For example, since the typical finger resistance is about 100 kPa, it is preferable to have a lower resistance.

Next, referring to FIG. 6, the operation of the control circuit 214 will be briefly described.

First, until the finger 2 touches the conductive film electrode 212, the switch is off and the npn first transistor TR1 is turned off, so that the base B of the second transistor TR2 is turned off. A high potential is applied to the second transistor TR2, which is a pnp type, so that power is not supplied to the light source 232 in a state of being turned off.

By the way, when the finger 2 touches the first and second electrodes 212a and 212b and the distance between them is switched on with a finger resistance (about 100 kPa), the base B of the first transistor TR1 ), the first transistor (TR1) is turned on, current flows between the collector and the emitter, while the base (B) of the second transistor (TR2) becomes low potential, the second transistor (TR2) is turned on, and the light source (232) ), the power is supplied and it glows.

When the finger 2 is released from the first and second electrodes 212a and 212b, the light returns to the previous state, and the light source 232 no longer emits light. Therefore, since the light source 232 operates only when the finger 2 touches the conductive film electrode 212, it can be operated regardless of day or night.

The resistors R2, R3, R4 and capacitor C, which are not described in the control circuit 214 of FIG. 6, are for adjusting the input/output of the first transistor TR1 and the second transistor TR2, so that the environment is implemented. Can be specified according to.

In addition, the control circuit 214 may be provided in addition to the cover glass 210 except for the conductive film electrode 212. For example, the first and second electrodes 212a and 212b are implemented on the upper portion of the cover glass 210 and the rest of the components are electrically connected thereto and implemented on the same substrate together with the central processing unit 100 of the inner locking device. It may be.

According to an embodiment, as shown in FIG. 3, a light shielding film 224 may be further attached to the inner wall of the cylindrical glass tube 220. At this time, the light shielding film is preferably formed of a conductive film such as metal.

By doing so, it is possible to solve the problem that the light for irradiation of the fingerprint by the light source 232 enters the cylindrical glass tube 220 and interferes with the light totally reflected with the fingerprint information.

When forming a conductive light-shielding film 224 such as metal on the inner wall of the cylindrical glass tube 220, as shown in FIG. 5, the operation of the light source 232 with the conductive light-shielding film 224 in place of the conductive film electrode 212 It can also be used as a switch means.

As a specific example, two or more (224a, 224b) electrically spaced apart the conductive light-shielding film 224 on the inner wall of the cylindrical glass tube 220, the finger 2 approaching the cover glass 210 for fingerprint input It is possible to control the operation of the light source 232 by recognizing the change in capacitor between the conductive light-shielding films 224a and 224b spaced apart from each other.

As described above, when controlling the operation of the light source 232 by changing the capacitors of the spaced conductive light-shielding films 224a and 224b, there is an advantage that the finger 2 does not need to contact the cover glass 210.

7 illustrates one operation flowchart for the central processing unit 100. According to this, first, the dead bolt 26 protrudes to one side of the inner lock case 21 and starts from the closing of a lock (lock, lock) inserted into a catch box or strike (not shown) installed on the opposite wall (S110). .

When the light source 232 is turned on by receiving the control signal by the operation switch means described above, the fingerprint is recognized (S120), and it is determined whether the obtained fingerprint matches the stored fingerprint (S130), and if the fingerprint matches, the lock is opened. If not, while in the standby state, while waiting for the control signal of the fingerprint input unit 110, maintains the lock closed state.

After operating with the lock open, check whether it is set to the manual mode (S150), and if it is set to the manual mode, when the fingerprint is input again (S170), the lock is closed (S180), otherwise, the lock is maintained. When it is not set to manual mode but is set to automatic mode or common mode, when the door is closed, the lock is closed automatically after a certain time (about 4 seconds) (S160).

The present invention is equipped with a USB port 13, the secondary battery 17 or a portable terminal (not shown) built-in battery 27 can be operated even if the digital lock is fully discharged as well as the master key 15 You can set one master key and three different admin keys. The master key 15 can be set to a manual mode, an automatic mode, and a common mode. The inner locking device 20 may be configured to further reset the above-described setting by further placing a reset setting unit 170 as shown in FIG. 2.

In addition, the object of the present invention is an object 1 to be a drawer, a showcase, a wardrobe, a storage cabinet, etc., but is not limited thereto, and can be applied to various door locks.

10: outer input device 11: outer input case
12: fingerprint input unit 13: USB port
15: master key 16, 18: protrusion fastener
17: spare battery 20: inner lock
21: inner lock case 22, 24: fastener
23, 25: screw 26: deadbolt
27: battery 28: connector
29: battery case cover

Claims (6)

delete delete It is provided with an outer input device and an inner locking device which are fastened facing each other from the outside and the inside with one wall between the objects to be installed,
The external input device includes a fingerprint input unit having an operation switch means,
The inner locking device has a dead bolt operation unit, an internal power supply unit, a storage unit and a central processing unit,
The fingerprint input unit is a cover glass; A cylindrical optical member supporting the cover glass and totally reflecting down; A light source provided inside the cylindrical optical member; A solid-state imaging device disposed under the light source and receiving light totally reflected by the cylindrical optical member to obtain image information of a fingerprint; And an image processing device that processes image information obtained by the solid-state imaging device so that it can be contrasted with a fingerprint stored in the storage unit.
The operation switch means includes at least two conductive film electrodes disposed at regular intervals with a transmissive through hole for the light source on the top of the cover glass and a control circuit connected to the conductive film electrode to control the operation of the light source. Is composed by,
The conductive film electrode is a ring shape disposed on the edge of the cover glass as first and second electrodes,
The control circuit is the first electrode is connected to the supply power terminal (Vcc) provided from the internal power supply,
The second electrode is connected to the base of the npn type first transistor,
The collector of the first transistor passes through a first resistor and is connected to the supply power terminal Vcc,
The emitter of the first transistor is connected to a ground terminal through a second resistor,
The collector of the first transistor passes through a third resistor and is connected to the base of the second transistor of pnp type,
The emitter of the second transistor is connected to the supply power terminal (Vcc),
The collector of the second transistor is connected to a ground terminal through a fourth resistor and the light source,
A digital lock device, characterized in that a capacitor is connected between the collector and the ground terminal of the first transistor.
It is provided with an outer input device and an inner locking device which are fastened facing each other from the outside and the inside with one wall between the objects to be installed,
The external input device includes a fingerprint input unit having an operation switch means,
The inner locking device has a dead bolt operation unit, an internal power supply unit, a storage unit and a central processing unit,
The fingerprint input unit is a cover glass; A cylindrical optical member supporting the cover glass and totally reflecting down; A light source provided inside the cylindrical optical member; A solid-state imaging device disposed under the light source and receiving light totally reflected by the cylindrical optical member to obtain image information of a fingerprint; And an image processing device that processes image information obtained by the solid-state imaging device so that it can be contrasted with a fingerprint stored in the storage unit.
The operation switch means includes at least two conductive film electrodes disposed at regular intervals with a transmissive through hole for the light source on the top of the cover glass and a control circuit connected to the conductive film electrode to control the operation of the light source. Is composed by,
The cylindrical optical member is a cylindrical glass tube having the same refractive index as the cover glass,
A digital lock device characterized in that a light shielding film is further attached to the inner wall of the cylindrical glass tube.
It is provided with an outer input device and an inner locking device which are fastened facing each other from the outside and the inside with one wall between the objects to be installed,
The external input device includes a fingerprint input unit having an operation switch means,
The inner locking device has a dead bolt operation unit, an internal power supply unit, a storage unit and a central processing unit,
The fingerprint input unit is a cover glass; A cylindrical optical member supporting the cover glass and totally reflecting down; A light source provided inside the cylindrical optical member; A solid-state imaging device disposed under the light source and receiving light totally reflected by the cylindrical optical member to obtain image information of a fingerprint; And an image processing device that processes image information obtained by the solid-state imaging device so that it can be contrasted with a fingerprint stored in the storage unit.
The cylindrical optical member is a cylindrical glass tube having the same refractive index as the cover glass,
The operation switch means comprises a control circuit for controlling the operation of the light source by recognizing changes in the capacitors of the two or more conductive light-shielding film provided on the inner wall of the cylindrical glass tube and the conductive light-shielding film.
The method according to any one of claims 3 to 5,
The lower portion of the cylindrical optical member has a digital locking device, characterized in that having a light output surface inclined at a predetermined angle inward.

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