An optical combination lock

Abstract

An embodiment of the present invention provides an optical combination lock, which relates to the field of combination locks. The optical combination lock includes a control unit, a transmitting component, a receiving component, an optical path component, a key component and a bolt component. The transmitting component is used to emit light when the key component is set in the keyhole, wherein the light passes through the key component and the optical path component to irradiate the receiving component; the receiving component is used to receive the light and generate key information according to the optical signal of the light; the control unit is used to compare the key information with a preset key, and is used to control the bolt component to unlock when the key information matches the preset key. In the present invention, after the light emitted by the transmitting component passes through the key component, the spectrum information of the key component is projected onto the receiving component, thereby unlocking the lock. The use of light to achieve unlocking provides the security performance of the entire optical combination lock.

Description

Technical Field

[0001] The invention relates to the field of password locks, and in particular to an optical password lock. Background Art

[0002] At present, the mainstream locks are mainly traditional mechanical locks, mechanical password locks, magnetic card locks, and fingerprint locks, but these locks all have some shortcomings. For example, traditional mechanical locks are easy to be damaged, have low anti-theft performance, and keys are easy to copy; general mechanical password locks have low encryption bits, and even the password can be cracked after a limited number of attempts, and the security performance cannot be guaranteed; magnetic card locks transmit encrypted information through electromagnetic technology, which also poses great security risks, and there are even special magnetic card lock cracking tools for sale online; fingerprint locks are based on biometrics and are very convenient to use, but people leave their fingerprints everywhere every day, so they are easily copied by criminals, and there are also great security risks, and the security performance is poor. Summary of the invention

[0003] The object of the present invention is to provide an optical combination lock which can be unlocked by light and improves the safety performance of the entire optical combination lock.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] In a first aspect, an embodiment provides an optical password lock, comprising: a control unit, a transmitting component, a receiving component, an optical path component, a key component and a bolt component, wherein the transmitting component is arranged at one end of the optical path component, the receiving component is arranged at the other end of the optical path component, a key hole is arranged on the optical path component, and the receiving component is electrically connected to the control unit;

[0006] The transmitting component is used to emit light when the key component is set in the key hole, wherein the light passes through the key component and the optical path component to irradiate the receiving component;

[0007] The receiving component is used to receive the light and generate key information according to the optical signal of the light;

[0008] The control unit is used to compare the key information with a preset key, and to control the lock bolt assembly to unlock when the key information matches the preset key.

[0009] In an optional embodiment, the receiving component includes a receiving board, a plurality of photoresistors are arranged on the receiving board, a plurality of photoresistors are arrayed on the receiving board, the photoresistors are arranged toward the transmitting component, and the plurality of photoresistors are electrically connected to the control unit;

[0010] When the light emitted by the emitting component irradiates the photoresistor, the control unit detects the resistance values ​​of the plurality of photoresistors in sequence to obtain the key information.

[0011] In an optional embodiment, the control unit is used to obtain the resistance values ​​of multiple photoresistors in sequence. When it is detected that the resistance value of the photoresistor is greater than a preset resistance value, the control unit is used to mark the photoresistor as first information and record the first information to a position corresponding to the photoresistor. When the resistance value of the photoresistor is less than the preset resistance value, the control unit is used to mark the photoresistor as second information and record the second information to a position corresponding to the photoresistor. The first information or the second information of multiple photoresistors forms the key information.

[0012] In an optional embodiment, the control unit is used to sequentially obtain the resistance values ​​of the plurality of photoresistors. When it is detected that the resistance value of the photoresistor is within a preset interval among the plurality of preset intervals, the control unit is used to mark the photoresistor as preset information corresponding to the preset interval, and the preset information is placed at the position of the photoresistor. The preset information of the plurality of photoresistors forms the key information, wherein the plurality of preset intervals are sequentially continuous. In an optional embodiment, the optical password lock further includes a first conductive chip and a second conductive chip, the first conductive chip and the second conductive chip are electrically connected to the control unit, the control unit has a reading end, the plurality of photoresistors are arrayed to form a plurality of rows and columns, the first conductive chip has a plurality of first conductive ends, one of the first conductive ends is electrically connected to the plurality of photoresistors in the same row, the first conductive chip is connected to a power supply, the second conductive chip has a plurality of second conductive ends, one of the second conductive ends is electrically connected to the plurality of photoresistors in the same column, the second conductive chip is grounded, and the reading end sequentially reads the resistance values ​​of the plurality of photoresistors;

[0013] The control unit is used to send an acquisition signal corresponding to one of the photoresistors;

[0014] The first conduction chip is used to control the conduction of the first conduction end connected to the photoresistor according to the acquisition signal, the second conduction chip is used to control the conduction of the second conduction end connected to the photoresistor according to the acquisition signal, so that the photoresistor is turned on, and the reading end is used to read the resistance value of the photoresistor.

[0015] In an optional embodiment, the receiving component includes an image collector, and the image collector is used to receive image information of the light on the image collector and generate the key information according to the image information. In an optional embodiment, the key component is a diffractive optical element.

[0016] In an optional embodiment, the key assembly includes a plurality of diffractive optical sheets, the plurality of diffractive optical sheets are sequentially arranged in the keyhole, and the light passes through the plurality of diffractive optical sheets sequentially.

[0017] In an optional embodiment, the phase distribution between the plurality of diffractive optical sheets is a preset phase value.

[0018] In an optional embodiment, the lock bolt assembly includes a drive switch, a driver and a lock bolt structure, the drive switch is electrically connected to the control unit, the drive switch is connected in series between a power source and the driver, and the driver is drivingly connected to the lock bolt structure;

[0019] The control unit is used to send a start signal to the drive switch after determining that the key information matches the preset key, and the drive switch is turned on, so that the driver drives the lock bolt structure to unlock.

[0020] Beneficial effects of the embodiments of the present invention: the optical combination lock includes a control unit, a transmitting component, a receiving component, an optical path component, a key component and a bolt component, the transmitting component is arranged at one end of the optical path component, the receiving component is arranged at the other end of the optical path component, a keyhole is arranged on the optical path component, and the receiving component is electrically connected to the control unit; the transmitting component is used to emit light when the key component is arranged in the keyhole, wherein the light passes through the key component and the optical path component and is irradiated onto the receiving component; the receiving component is used to receive the light and generate key information according to the optical signal of the light; the control unit is used to compare the key information with a preset key, and is used to control the bolt component to unlock when the key information matches the preset key.

[0021] In the present invention, when the key assembly is inserted into the keyhole, the transmitting assembly generates light, and the light passes through the key assembly and the optical path assembly and then irradiates the receiving assembly. The receiving assembly generates key information according to the light signal of the light. After receiving the key information, the control unit compares the key information with the preset key, and when the two match, controls the bolt assembly to unlock. In the present invention, after the light emitted by the transmitting assembly passes through the key assembly, the spectrum information of the key assembly is projected onto the receiving assembly, thereby unlocking the lock. The key assembly can concentrate rich spectrum information in a very small size, and the use of light to achieve unlocking provides the security performance of the entire optical password lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the structure of an optical combination lock provided by an embodiment of the present invention;

[0024] Figure 2 The key component of the optical password lock provided in the embodiment of the present invention is the spectrum information of a single diffractive optical sheet;

[0025] Figure 3 The key component of the optical password lock provided in the embodiment of the present invention is the spectrum information of multiple diffractive optical sheets;

[0026] Figure 4 The key component of the optical password lock provided in the embodiment of the present invention is the spectrum information of a plurality of diffractive optical sheets arranged at an angle;

[0027] Figure 5 A circuit diagram of an optical combination lock provided by an embodiment of the present invention;

[0028] Figure 6 A circuit diagram of a transmitting component of an optical combination lock provided in an embodiment of the present invention;

[0029] Figure 7 A circuit diagram of a bolt assembly of an optical combination lock provided by an embodiment of the present invention;

[0030] Figure 8 A circuit diagram of an alarm unit of an optical combination lock provided in an embodiment of the present invention.

[0031] Icons: 100-optical combination lock; 110-control unit; 112-reading end; 120-key assembly; 122-diffractive optical sheet; 130-receiving assembly; 132-receiving plate; 134-photoresistor; 140-optical path assembly; 141-keyhole; 142-first optical path structure; 1422-emitting hole; 1424-first channel; 1426-installation part; 144-second optical path structure; 1442-second channel; 146-convex lens; 150-emitting assembly; 152-emitting light source; 154-start switch; 156-emitting switch; 160-bolt assembly; 162-driving switch; 164-driver; 170-first conduction chip; 172-first conduction end; 180-second conduction chip; 182-second conduction end; 190-alarm unit; 192-alarm switch; 194-alarm. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0037] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0038] Example

[0039] See also Figure 1 This embodiment provides an optical combination lock 100. The optical combination lock 100 provided in this embodiment can be unlocked by light, which provides security performance for the entire optical combination lock 100.

[0040] In this embodiment, the optical combination lock 100 includes: a control unit 110, a transmitting component 150, a receiving component 130, an optical path component 140, a key component 120 and a bolt component 160, wherein the transmitting component 150 is arranged at one end of the optical path component 140, the receiving component 130 is arranged at the other end of the optical path component 140, a key hole 141 is arranged on the optical path component 140, and the receiving component 130 is electrically connected to the control unit 110;

[0041] The transmitting component 150 is used to transmit light when the key component 120 is set in the key hole 141, wherein the light passes through the key component 120 and the optical path component 140 and irradiates the receiving component 130;

[0042] The receiving component 130 is used to receive light and generate key information according to the optical signal of the light;

[0043] The control unit 110 is used to compare the key information with the preset key, and to control the bolt assembly 160 to unlock when the key information matches the preset key.

[0044] In this embodiment, when the key assembly 120 is inserted into the key hole 141, the transmitting assembly 150 generates light, and the light passes through the key assembly 120 and the optical path assembly 140 and then irradiates the receiving assembly 130. The receiving assembly 130 generates key information according to the light signal of the light. After receiving the key information, the control unit 110 compares the key information with the preset key, and when the two match, controls the bolt assembly 160 to unlock. In this embodiment, after the light emitted by the transmitting assembly 150 passes through the key assembly 120, the spectrum information of the key assembly 120 is projected onto the receiving assembly 130, thereby unlocking the lock. The key assembly 120 can concentrate rich spectrum information in a very small size, and the use of light to achieve unlocking provides security performance for the entire optical combination lock 100.

[0045] In this embodiment, the key assembly 120 is a diffractive optical element. Different diffractive optical elements have different spectrum information, and it can be determined whether it is the corresponding key assembly 120 based on the spectrum information, and the correct spectrum information is converted into a preset key and stored in the control unit 110. The spectrum information of the diffractive optical element is roughly as follows: when the light is irradiated on the key assembly 120, the spectrum information of the key assembly 120 is roughly a plurality of light spots, and when the light emitted by the transmitting component 150 passes through the key assembly 120, a plurality of light spots are formed on the receiving component 130, and it can be determined whether the key assembly 120 is the correct key assembly 120 based on the position of the light spots.

[0046] In this embodiment, the control unit 110 is a STM32 single chip microcomputer.

[0047] In this embodiment, if Figure 2As shown, when the diffractive optical element is used, Figure a is the image plane phase distribution diagram of the diffractive light source element, and Figure b is the corresponding spectrum plane light intensity distribution diagram.

[0048] In this embodiment, the key assembly 120 includes a plurality of diffractive optical sheets 122, which are sequentially arranged in the key hole 141, and light sequentially passes through the plurality of diffractive optical sheets 122. When the key assembly 120 includes a plurality of diffractive optical sheets 122, the spectrum information formed on the receiving assembly 130 is the spectrum information of the plurality of diffractive optical sheets 122 superimposed, and the use of a plurality of diffractive optical sheets 122 can increase the encryption strength.

[0049] In this embodiment, a plurality of diffractive optical sheets 122 may be distributed in the hands of different persons, and unlocking is achieved when the plurality of diffractive optical sheets 122 are gathered together.

[0050] like Figure 3 As described above, when there are two diffraction optical sheets, the lock can be unlocked only after the two diffraction optical sheets are inserted into the keyhole at the same time, wherein figure a is the image plane phase distribution diagram of the diffraction light source element, and figure b is the spectrum plane light intensity distribution diagram. Figure c is the image plane phase distribution diagram of another diffraction light source element, and figure d is the corresponding spectrum plane light intensity distribution diagram. It should be noted that the phase distribution between multiple diffraction optical sheets 122 can also be set, and the phase distribution between the multiple diffraction optical sheets is a phase preset value, so as to improve the encryption dimension of the entire key assembly 120. For example: when there are two diffraction optical sheets, the phase preset value of the overall random phase distribution of the two diffraction optical sheets is R, that is, among the two diffraction optical sheets, one of the diffraction optical sheets is a negative of R, and can only display the correct spectrum information after being superimposed with the other diffraction optical sheet. Figure 4 The above-mentioned, wherein figure a is the image plane phase distribution diagram of the diffraction light source element, and figure b is the corresponding spectrum plane light intensity distribution diagram. Figure c is the image plane phase distribution diagram of another diffraction light source element, and figure d is the corresponding spectrum plane light intensity distribution diagram. Figure e is the image plane phase distribution diagram after the two diffraction light source elements are superimposed, and figure f is the corresponding spectrum plane light intensity distribution diagram.

[0051] See also Figure 5 In this embodiment, the receiving component 130 includes a receiving board 132, on which a plurality of photoresistors 134 are arranged, and the plurality of photoresistors 134 are arrayed on the receiving board 132, the photoresistors 134 are arranged toward the transmitting component 150, and the plurality of photoresistors 134 are electrically connected to the control unit 110;

[0052] When the light emitted by the emitting component 150 irradiates the photoresistors 134 , the control unit 110 detects the resistance values ​​of the photoresistors 134 in sequence to obtain the key information.

[0053] In this embodiment, when light is irradiated to the photoresistor 134, the resistance of the photoresistor 134 is very small, and the resistance of the photoresistor 134 not irradiated by light is very large. By detecting the distribution position of the light spot of the change in the resistance of the photoresistor 134, the spectrum information of the key component 120 is determined, the key information is obtained, and it is determined whether the key component 120 is correct.

[0054] In this embodiment, the control unit 110 is used to obtain the resistance values ​​of multiple photoresistors 134 in sequence. When it is detected that the resistance value of the photoresistor 134 is greater than the preset resistance value, the control unit 110 is used to mark the photoresistor 134 as the first information and record the first information to the position corresponding to the photoresistor 134. When the resistance value of the photoresistor 134 is less than the preset resistance value, the control unit 110 is used to mark the photoresistor 134 as the second information and record the second information to the position corresponding to the photoresistor 134. The first information or the second information of the multiple photoresistors 134 forms key information.

[0055] In this embodiment, after the receiving component 130 receives the light, the resistance values ​​of multiple photosensitive components are obtained in sequence. When the resistance value of the photoresistor 134 is greater than the preset resistance value, the resistance value of the photoresistor 134 is infinite, and it can be determined that the photoresistor 134 is currently in a dark state, that is, there is no light spot at this position, and the photoresistor 134 can be marked as the first information, that is, marked as 0. If it is detected that the resistance value of the photoresistor 134 is less than the preset resistance value, it means that the resistance value of the photoresistor 134 is very small, almost not zero, that is, there is a light spot irradiated at this position, and the photoresistor 134 can be marked as the second information, that is, marked as 1.

[0056] In this embodiment, the resistance values ​​of multiple photoresistors 134 are detected in sequence, and multiple first information or multiple second information are recorded in sequence, and finally key information is formed. The key information may be "1001...1001" or "0011...111". The key information is compared with the preset key. When the two match, the lock can be unlocked.

[0057] In other embodiments of the present invention, marking can also be performed in a multi-base manner. The control unit 110 is used to sequentially obtain the resistance values ​​of multiple photoresistors 134. When it is detected that the resistance value of the photoresistor 134 is within a preset interval among multiple preset intervals, the control unit 110 is used to mark the photoresistor 134 with preset information corresponding to the preset interval, and the preset information is placed at the position of the photoresistor 134. The preset information of multiple photoresistors 134 forms key information, wherein the multiple preset intervals are continuous in sequence.

[0058] For example, when the multi-base is decimal, the preset intervals have ten consecutive intervals from small to large, namely the first preset interval, the second preset interval, the third preset interval...the eighth preset interval, the ninth preset interval, and the tenth preset interval. When the resistance of the photoresistor 134 is detected to be in the first preset interval, the control unit 110 marks the preset information of the photoresistor 134 as 1, and marks the preset information of the photoresistor 134 as 2 in the second preset interval. When in other intervals, the preset information can be deduced by analogy, and the key information finally formed can be "1254...8597", "13897...54839", etc. The resistance of the photoresistor 134 is marked in a decimal manner, and decimal encoding is performed according to the resistance variation range of the photoresistor 134, thereby improving the encryption dimension of the key information and improving the security performance. In this embodiment, the optical password lock 100 further includes a first conductive chip 170 and a second conductive chip 180, the first conductive chip 170 and the second conductive chip 180 are electrically connected to the control unit 110, the control unit 110 has a reading end 112, a plurality of photoresistors 134 are arrayed to form multiple rows and columns, the first conductive chip 170 has multiple first conductive ends 172, one first conductive end 172 is electrically connected to multiple photoresistors 134 in the same row, the first conductive chip 170 is connected to a power supply, the second conductive chip 180 has multiple second conductive ends 182, one second conductive end 182 is electrically connected to multiple photoresistors 134 in the same column, the second conductive chip 180 is grounded, and the reading end 112 reads the resistance values ​​of the multiple photoresistors 134 in sequence;

[0059] The control unit 110 is used to send an acquisition signal corresponding to one of the photoresistors 134;

[0060] The first conductive chip 170 is used to control the first conductive end 172 connected to the photoresistor 134 to be conductive according to the acquired signal, and the second conductive chip 180 is used to control the second conductive end 182 connected to the photoresistor 134 to be conductive according to the acquired signal, so that the photoresistor 134 is conductive, and the reading end 112 is used to read the resistance value of the photoresistor 134.

[0061] In this embodiment, when light is irradiated onto the photoresistor 134, the resistance of the photoresistor 134 changes, and the control unit 110 sequentially obtains the resistance of each photoresistor 134. Starting from the first photoresistor 134, when the control unit 110 wants to obtain the resistance of the photoresistor 134, the control unit 110 sends an acquisition signal corresponding to the photoresistor 134, and after the first conductive chip 170 receives the signal, the first conductive end 172 connected to the photoresistor 134 is turned on, and after the second conductive chip 180 receives the signal, the second conductive end 182 connected to the photoresistor 134 is turned on, so that one end of the photoresistor 134 is connected to the power supply and the other end is grounded, so that the photoresistor 134 is powered on, and the reading end 112 reads the resistance of the photoresistor 134. After completion, the resistance of the next photoresistor 134 is read in the same way.

[0062] In other embodiments of the present invention, the receiving component 130 includes an image collector, which is used to receive image information of light on the image collector and generate key information according to the image information.

[0063] When the receiving component 130 is an image collector, the light forms an image on the image collector, and the image collector generates key information according to the collected image information and sends it to the control unit 110 .

[0064] Please continue reading Figure 1 In this embodiment, the optical path component 140 includes a first optical path structure 142, a second optical path structure 144 and a convex lens 146. The first optical path structure 142 is provided with an emitting hole 1422 and a first channel 1424. The emitting hole 1422 is communicated with the first channel 1424. The keyhole 141 is provided on the first optical path structure 142 and is communicated with the first channel 1424. The emitting hole 1422 is used to accommodate the emitting component 150. The second optical path structure 144 is provided with a second channel 1442. The convex lens 146 is installed in the second channel 1442. One end of the second channel 1442 is connected to the first channel 1424. The receiving component 130 is provided at one end of the second channel 1442 away from the first channel 1424.

[0065] In this embodiment, the transmitting component 150 is disposed at the front focal plane of the convex lens 146 , and the receiving component 130 is disposed at the back focal plane of the convex lens 146 .

[0066] In this embodiment, a mounting portion 1426 is disposed on the first optical path structure 142 , and the mounting portion 1426 extends into the second channel 1442 .

[0067] In this embodiment, the first optical path structure 142 extends into the second channel 1442, so that all the light emitted by the emitting component 150 can be refracted by the convex lens 146 and converged at the plurality of photoresistors 134, thereby improving the accuracy of the key information.

[0068] In this embodiment, the convex lens 146 provides a far-field condition for the receiving component 130 to receive light.

[0069] It should be noted that the first light path structure 142 , the second light path structure 144 and the convex lens 146 can be integrally formed.

[0070] See also Figure 6 In this embodiment, the transmitting component 150 includes a transmitting light source 152, a starting switch 154, and a transmitting switch 156. The transmitting switch 156 is connected in series between a power source and the transmitting light source 152. The starting switch 154 is electrically connected to the transmitting switch 156. When the starting switch 154 is closed, the transmitting switch 156 is turned on, so that the power source and the transmitting light source 152 are turned on.

[0071] In this embodiment, when the key assembly 120 is installed in the key hole 141, the start switch 154 is started, the emission switch 156 is turned on, the emission light source 152 is connected to the power supply, and the emission light source 152 emits light.

[0072] In this embodiment, the start switch 154 is a push button switch. When the key assembly 120 is placed in the key hole 141, the push button switch is pressed, and the emission switch 156 is turned on, so that the emission light source 152 is turned on.

[0073] In this embodiment, the conduction switch is a transistor, the base is electrically connected to the start switch 154 , the collector is connected to the power supply, and the emitter is electrically connected to the emission light source 152 .

[0074] See also Figure 7 In this embodiment, the bolt assembly 160 includes a drive switch 162, a driver 164 and a bolt structure. The drive switch 162 is electrically connected to the control unit 110. The drive switch 162 is connected in series between a power source and the driver 164. The driver 164 is in transmission connection with the bolt structure.

[0075] The control unit 110 is used to send a start signal to the drive switch 162 after determining that the key information matches the preset key, and the drive switch 162 is turned on, so that the driver 164 drives the lock bolt structure to unlock.

[0076] In this embodiment, the driving switch 162 has a first end, a second end and a third end. The first end is electrically connected to the control unit 110, the second end is electrically connected to the power supply, and the third end is electrically connected to the driver 164. When the first end receives a start signal, the second end and the third end are connected.

[0077] In this embodiment, the first end is the base, the second end is the collector, and the third end is the emitter.

[0078] See also Figure 8 The optical combination lock 100 further includes an alarm unit 190, which is electrically connected to the control unit 110. The control unit 110 is used to send a matching signal to the alarm unit 190 when the key information matches the preset key, so that the alarm unit 190 sends a first alarm signal;

[0079] The control unit 110 is further configured to send a failure signal to the alarm unit 190 when the key information does not match the preset key, so that the alarm unit 190 sends a second alarm signal.

[0080] In this embodiment, the alarm unit 190 includes an alarm switch 192 and an alarm 194. The alarm switch 192 is electrically connected to the control unit 110, and the alarm switch 192 is connected in series between a power supply and the alarm 194. When the alarm switch 192 receives a matching signal, the alarm unit 190 sends a first alarm signal. When the alarm switch 192 receives a failure signal, the alarm unit 190 sends a second alarm signal.

[0081] In this embodiment, when the key information matches the preset key, the alarm 194 issues an "unlocking success" indication, and when the key information does not match the preset key, the alarm 194 issues an "unlocking failure" indication.

[0082] The working principle of the optical combination lock 100 provided in this embodiment is as follows: in this embodiment, when a diffractive optical sheet 122 is placed in a keyhole 141, the emitting light source 152 emits light, which is imaged on the photoresistor 134 after passing through the optical path component 140 and the diffractive optical sheet 122. The control unit 110 obtains the resistance value of the photoresistor 134 in turn, converts it into key information, and unlocks the door when the key information matches the preset key, and controls the alarm 194 to send an "unlocking success" indication.

[0083] In summary, the optical combination lock 100 provided in this embodiment, in this embodiment, when the key assembly 120 is inserted into the key hole 141, the transmitting assembly 150 generates light, and the light passes through the key assembly 120 and the optical path assembly 140 and then irradiates the receiving assembly 130. The receiving assembly 130 generates key information according to the light signal of the light, and the control unit 110 compares the key information with the preset key after receiving the key information, and when the two match, controls the bolt assembly 160 to unlock. In this embodiment, after the light emitted by the transmitting assembly 150 passes through the key assembly 120, the spectrum information of the key assembly 120 is projected onto the receiving assembly 130, thereby unlocking. The use of light to achieve unlocking provides the security performance of the entire optical combination lock 100.

[0084] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An optical combination lock, characterized in that: include: A control unit, a transmitting component, a receiving component, an optical path component, a key component and a bolt component, wherein the transmitting component is arranged at one end of the optical path component, the receiving component is arranged at the other end of the optical path component, a key hole is arranged on the optical path component, and the receiving component is electrically connected to the control unit; The transmitting component is used to emit light when the key component is set in the key hole, wherein the light passes through the key component and the optical path component to irradiate the receiving component; The receiving component is used to receive the light and generate key information according to the optical signal of the light; The control unit is used to compare the key information with the preset key, and to control the lock bolt assembly to unlock when the key information matches the preset key; The key component is a diffractive optical element; The key assembly comprises a plurality of diffractive optical sheets, the plurality of diffractive optical sheets are sequentially arranged in the key hole, and the light sequentially passes through the plurality of diffractive optical sheets; The receiving component comprises a receiving board, a plurality of photoresistors are arranged on the receiving board, a plurality of the photoresistors are arrayed on the receiving board, the photoresistors are arranged toward the transmitting component, and the plurality of the photoresistors are electrically connected to the control unit; When the light emitted by the emitting component irradiates the photoresistor, the control unit detects the resistance values ​​of the plurality of photoresistors in sequence to obtain the key information.

2. The optical combination lock according to claim 1, characterized in that: The control unit is used to sequentially obtain the resistance values ​​of the multiple photoresistors. When it is detected that the resistance value of the photoresistor is greater than a preset resistance value, the control unit is used to mark the photoresistor as first information and record the first information to a position corresponding to the photoresistor. When the resistance value of the photoresistor is less than the preset resistance value, the control unit is used to mark the photoresistor as second information and record the second information to a position corresponding to the photoresistor. The first information or the second information of the multiple photoresistors forms the key information.

3. The optical combination lock according to claim 1, characterized in that: The control unit is used to sequentially obtain the resistance values ​​of the multiple photoresistors. When it is detected that the resistance value of the photoresistor is within a preset interval among multiple preset intervals, the control unit is used to mark the photoresistor with preset information corresponding to the preset interval, and correspond the preset information to the position of the photoresistor. The preset information of the multiple photoresistors forms the key information, wherein the multiple preset intervals are continuous in sequence.

4. The optical combination lock according to claim 2 or 3, characterized in that: The optical password lock further includes a first conductive chip and a second conductive chip, the first conductive chip and the second conductive chip are electrically connected to the control unit, the control unit has a reading end, a plurality of the photoresistors are arrayed to form a plurality of rows and columns, the first conductive chip has a plurality of first conductive ends, one of the first conductive ends is electrically connected to a plurality of the photoresistors in the same row, the first conductive chip is connected to a power supply, the second conductive chip has a plurality of second conductive ends, one of the second conductive ends is electrically connected to a plurality of the photoresistors in the same column, the second conductive chip is grounded, and the reading end reads the resistance values ​​of the plurality of the photoresistors in sequence; The control unit is used to send an acquisition signal corresponding to one of the photoresistors; The first conduction chip is used to control the conduction of the first conduction end connected to the photoresistor according to the acquisition signal, the second conduction chip is used to control the conduction of the second conduction end connected to the photoresistor according to the acquisition signal, so that the photoresistor is turned on, and the reading end is used to read the resistance value of the photoresistor.

5. The optical combination lock according to claim 1, characterized in that: The receiving component includes an image collector, which is used to receive image information of the light on the image collector and generate the key information according to the image information.

6. The optical combination lock according to claim 1, characterized in that: The phase distribution between the plurality of diffractive optical sheets is a preset phase value.

7. The optical combination lock according to claim 1, characterized in that: The lock bolt assembly comprises a drive switch, a driver and a lock bolt structure, wherein the drive switch is electrically connected to the control unit, the drive switch is connected in series between a power source and the driver, and the driver is drivingly connected to the lock bolt structure; The control unit is used to send a start signal to the drive switch after determining that the key information matches the preset key, and the drive switch is turned on, so that the driver drives the lock bolt structure to unlock.

Images