CN110984708A - Tapered end and intelligent lock - Google Patents
Tapered end and intelligent lock Download PDFInfo
- Publication number
- CN110984708A CN110984708A CN201911377803.8A CN201911377803A CN110984708A CN 110984708 A CN110984708 A CN 110984708A CN 201911377803 A CN201911377803 A CN 201911377803A CN 110984708 A CN110984708 A CN 110984708A
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- lock
- receiving unit
- detection circuit
- light receiving
- light
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
- E05B15/10—Bolts of locks or night latches
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
- E05B47/0012—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with rotary electromotors
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B2047/0048—Circuits, feeding, monitoring
- E05B2047/0067—Monitoring
- E05B2047/0069—Monitoring bolt position
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- Lock And Its Accessories (AREA)
Abstract
The invention discloses a lock head and an intelligent lock, wherein the lock head comprises: a lock body having an accommodation cavity; the lock tongue is positioned in the accommodating cavity; a detection circuit for detecting a state of the latch bolt after receiving the opening/closing signal; if a door opening signal is received and the lock tongue is in a lock closing in-place state or an intermediate state, unlocking is carried out, and the lock tongue is controlled to retract until the lock tongue is in an unlocking in-place state; if the door closing signal is received and the lock tongue is in the unlocking in-place state or the middle state, the locking action is carried out, and the lock tongue is controlled to extend out until the lock tongue is in the locking in-place state. According to the lock head and the intelligent lock, the state of the lock tongue is detected after the opening/closing signal is received, the expansion of the lock tongue is controlled according to the detected state of the lock tongue, the accurate control of the expansion of the lock tongue is realized, the precision of the expansion control of the lock tongue is improved, and the accurate unlocking and locking are realized.
Description
Technical Field
The invention belongs to the technical field of locks, and particularly relates to a lock head and an intelligent lock.
Background
The existing intelligent lock has the following two main modes of unlocking and locking in place identification:
the first method comprises the following steps: the lock is forcibly opened and closed by a mechanical structure. The inside of the lockset is generally provided with mechanical structures such as a spring, a magnet and the like, and the aim of locking and unlocking in place is achieved through the matching of the mechanical structures.
And the second method comprises the following steps: and positioning is carried out by means of acceleration chips such as an ACC chip and a six-axis accelerometer. Generally, before the intelligent lock leaves a factory, a calibration operation is required, the lock is mechanically opened or closed to a certain state, the value of the position is read by an acceleration chip and is written into a FLASH to serve as a command for the motor to run in place, so that the motor is controlled, and the purpose of opening and closing the lock is achieved.
However, both of the above approaches have drawbacks:
the first approach is the most traditional solution, but the mechanical structure has the disadvantages of complex structure, difficult assembly, high requirements on components and parts and the like compared with the electronic structure, and the intelligent lock cannot be miniaturized and lightened. In addition, the spring, magnet, etc. also age as the time of use increases, which limits the scalability of the mechanical solution for confirming the proper position of the switch lock.
For the second kind, whether accurate judgement that puts in place is accomplished to present ACC chip and six accelerometers to the judgement, and the error is great. Therefore, the intelligent lock can not be unlocked and locked in place easily, and the spring bolt expansion control precision is poor.
Disclosure of Invention
The invention provides a lock head, which solves the problem of poor control precision of the telescopic bolt in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
a lock cylinder, comprising:
a lock body having an accommodation cavity;
the lock tongue is positioned in the accommodating cavity;
a detection circuit for detecting a state of the latch bolt after receiving the opening/closing signal;
if a door opening signal is received and the lock tongue is in a lock closing in-place state or an intermediate state, unlocking is carried out, and the lock tongue is controlled to retract until the lock tongue is in an unlocking in-place state;
if the door closing signal is received and the lock tongue is in the unlocking in-place state or the middle state, the locking action is carried out, and the lock tongue is controlled to extend out until the lock tongue is in the locking in-place state.
Furthermore, a resistance band/probe is arranged on the lock tongue, a probe/resistance band is arranged on the lock head main body, and when the lock tongue stretches, the probe is in sliding contact with the resistance band; the detection circuit detects the resistance/voltage between one end of the resistance band and the probe, and detects the state of the lock tongue according to the detected resistance/voltage.
Still further, a resistor belt groove is formed on the bolt, and the resistor belt is fixed in the resistor belt groove; and a probe groove is formed in the accommodating cavity, and the probe is fixed in the probe groove.
Furthermore, the detection circuit comprises a voltage detection circuit and a control unit, the voltage detection circuit detects the voltage between one end of the resistance band and the probe and sends the detected voltage to the control unit, and the control unit detects the state of the lock tongue according to the received voltage.
Furthermore, the probe is connected with a direct current power supply, and one end of the resistance band is grounded through a divider resistor; or one end of the resistance band is connected with a direct current power supply, and the probe is grounded through a divider resistor; the voltage detection circuit comprises a first voltage comparator and a second voltage comparator; a positive phase input end of the first voltage comparator is connected with a voltage division node, and an inverted phase input end of the first voltage comparator is connected with a first reference voltage; the output end of the first voltage comparator is connected with the control unit; the inverting input end of the second voltage comparator is connected with a voltage division node, and the non-inverting input end of the second voltage comparator is connected with a second reference voltage; the output end of the second voltage comparator is connected with the control unit; the control unit detects the state of the lock tongue according to the output levels of the two voltage comparators: if the control unit receives a high level signal output by the first voltage comparator, the lock tongue is judged to be in a locking in-place state; if the control unit receives a high level signal output by the second voltage comparator, the lock bolt is judged to be in an unlocking in-place state; if the control unit receives that the output signals of the first voltage comparator and the second voltage comparator are both low level signals, the lock tongue is judged to be in the middle state.
Furthermore, the detection circuit also comprises an AD conversion circuit, the voltage detection circuit sends the detected voltage to the AD conversion circuit, the voltage is converted into a digital signal through the AD conversion circuit and sent to the control unit, and the control unit detects the state of the bolt according to the received digital signal.
Still further, a light-emitting unit is fixed on the lock tongue, and a first light-receiving unit and a second light-receiving unit are fixed on the lock head body; when the lock tongue is retracted into the accommodating cavity, the light-emitting unit is over against the first light-receiving unit, and the first light-receiving unit receives the light signal emitted by the light-emitting unit, generates an electric signal and sends the electric signal to the detection circuit; when the lock tongue extends out of the accommodating cavity by a set length, the light-emitting unit is over against a second light-receiving unit, and the second light-receiving unit receives light signals emitted by the light-emitting unit, generates electric signals and sends the electric signals to the detection circuit; the detection circuit detects the state of the bolt according to the received electric signals sent by the first light receiving unit and the second light receiving unit.
Furthermore, the light emitting unit is an infrared emitter, and the first light receiving unit and the second light receiving unit are both infrared receivers; if the detection circuit receives the electric signal sent by the second light receiving unit, the lock tongue is judged to be in the locked state; if the detection circuit receives the electric signal sent by the first light receiving unit, the lock bolt is judged to be in an unlocking in-place state; and if the detection circuit does not receive the electric signals sent by the first light receiving unit and the second light receiving unit, the lock tongue is judged to be in the middle state.
Still further, the light emitting unit is a light emitting diode, and the first light receiving unit and the second light receiving unit are both photodiodes; the anode of the first light receiving unit is connected with a direct current power supply, the cathode of the first light receiving unit is grounded through a pull-down resistor, and the cathode of the first light receiving unit is connected with a detection circuit; the anode of the second light receiving unit is connected with a direct current power supply, the cathode of the second light receiving unit is grounded through another pull-down resistor, and the cathode of the second light receiving unit is connected with the detection circuit; if the detection circuit receives a high level signal sent by the second light receiving unit, the lock tongue is judged to be in a locking in-place state; if the detection circuit receives a high level signal sent by the first light receiving unit, the lock bolt is judged to be in an unlocking in-place state; and if the detection circuit receives low level signals sent by the first light receiving unit and the second light receiving unit, the bolt is judged to be in the middle state.
Based on the design of the lock head, the invention further provides an intelligent lock which comprises a lock body and the lock head, wherein the lock head main body of the lock head is fixed with the lock body.
Compared with the prior art, the invention has the advantages and positive effects that: according to the lock head and the intelligent lock, the state of the lock tongue is detected after the opening/closing signal is received, the expansion of the lock tongue is controlled according to the detected state of the lock tongue, the accurate control of the expansion of the lock tongue is realized, the precision of the expansion control of the lock tongue is improved, and the accurate unlocking and locking are realized.
Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of an intelligent lock according to the present invention;
FIG. 2 is an exploded view of the lock cylinder of FIG. 1;
FIG. 3 is a top view of the smart lock of FIG. 1 in an unlocked position;
FIG. 4 is a cross-sectional view of FIG. 3;
FIG. 5 is a top view of the smart lock of FIG. 1 in a locked position;
FIG. 6 is a cross-sectional view of FIG. 5;
FIG. 7 is a schematic view of the connection of the resistive band and probe of the lock cylinder of FIG. 1;
FIG. 8 is a circuit configuration diagram of a detection circuit of the lock cylinder of FIG. 1;
FIG. 9 is a flowchart of steps performed by the detection circuit of the lock cylinder of FIG. 1;
FIG. 10 is a schematic structural diagram of another embodiment of the intelligent lock of the present invention;
FIG. 11 is an exploded view of the lock cylinder of FIG. 10;
FIG. 12 is a top view of the smart lock of FIG. 10 in an unlocked position;
FIG. 13 is a cross-sectional view of FIG. 12;
FIG. 14 is a top view of the smart lock of FIG. 10 in a locked position;
FIG. 15 is a cross-sectional view of FIG. 14;
FIG. 16 is a schematic block circuit diagram of the lock cylinder of FIG. 10;
fig. 17 is a schematic diagram of circuit connections of the first light receiving unit and the second light receiving unit with the control unit in fig. 16.
Reference numerals:
100. a lock body;
200. a lock head;
210. a lock body; 211. mounting a plate; 212. a screw hole; 213. a probe slot; 214. a probe;
220. a latch bolt; 221. a resistor is provided with a groove; 222. a resistance band;
300. a lock head;
310. a lock body; 311. mounting a plate; 312. a screw hole; 313. a placement groove; 314. a first light receiving unit; 315. a second light receiving unit; 316. a PCB;
320. a latch bolt; 321. a groove; 322. a light emitting unit; 323. a protective cover.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The first embodiment,
The lock head 200 of the embodiment mainly includes a lock head main body 210, a lock tongue 220, a detection circuit, and the like, and as shown in fig. 1 to 7, the lock head main body 210 has an accommodating cavity, and the lock tongue 220 is located in the accommodating cavity and can extend out and retract to realize unlocking and locking.
The detection circuit is used to perform the following steps, as shown in fig. 9.
S1: inputting an opening/closing signal; the detection circuit detects the state of the latch bolt after receiving the opening/closing signal.
S2: the detection circuit detects the state of the lock tongue.
S3: and controlling the action of the lock tongue according to the state of the lock tongue until the lock tongue is in an unlocking in-place state or a locking in-place state.
The detection circuit detects the state of the bolt, and when the door opening signal is input and the bolt is in the lock closing in-place state or the middle state, the step S4 is executed; when the door closing signal is input and the locking bolt is in the unlocking in-place state or the intermediate state, step S5 is executed.
S4: and (4) carrying out unlocking action to control the bolt to retract until the bolt is in an unlocking in-place state.
S5: and locking action is carried out, and the bolt is controlled to extend out until the bolt is in a locking in-place state.
The lock head of the embodiment detects the state of the lock tongue after receiving the opening/closing signal; if the input is a door opening signal and the lock tongue is in a lock closing in-place state or an intermediate state, unlocking is carried out, and the lock tongue is controlled to retract until the lock tongue is in an unlocking in-place state; if the input is a door closing signal and the lock tongue is in an unlocking in-place state or an intermediate state, locking action is carried out, and the lock tongue is controlled to extend out until the lock tongue is in a locking in-place state; therefore, the lock head of the embodiment detects the state of the lock bolt after receiving the opening/closing signal, controls the expansion of the lock bolt according to the detected state of the lock bolt, realizes the accurate control of the expansion of the lock bolt, improves the precision of the expansion control of the lock bolt, and realizes the accurate unlocking and locking.
A resistance band/probe is arranged on the bolt 220, a probe/resistance band is arranged on the lock head main body 210, the resistance band is in contact with the probe, and when the bolt 220 stretches, the probe is in sliding contact with the resistance band; when the probe slides along the resistance band, the probe and the resistance band are always kept in a contact state; the detection circuit detects the resistance/voltage between one end of the resistance band and the probe, detects the state of the lock tongue according to the detected resistance/voltage, and controls the stretching of the lock tongue according to the state of the lock tongue.
The lock head main body 210 is provided with a mounting plate 211, the mounting plate 211 is provided with a screw hole 212, and the mounting plate 211 is fixed with another door or a wall body through a screw; the bolt 220 extends out to match with another door or a lock hole on a wall body, so as to lock the door.
According to the lock head of the embodiment, when the lock tongue 220 stretches, the probe slides along the resistance band, the resistance/voltage between one end of the resistance band and the probe changes, the magnitude of the resistance/voltage corresponds to the position of the lock tongue, and the specific position of the lock tongue 220 can be known according to the resistance/voltage; the detection circuit detects the resistance/voltage between one end of the resistance band and the probe, learns the position of the spring bolt according to the detected resistance/voltage, detects the state of the spring bolt, controls the stretching of the spring bolt according to the state of the spring bolt, realizes the precise control of the stretching of the spring bolt, improves the precision of the stretching control of the spring bolt, and realizes the accurate unlocking and locking.
Since the resistance band 222 is more easily moved along the latch bolt 220 than the probe 214, the latch bolt 220 is provided with the resistance band 222 and the lock body 210 is provided with the probe 214 in order to ensure smooth extension and retraction of the latch bolt 220. That is, the probe 214 is fixed on the lock body 210 and the position is not changed; resistance band 222 is fixed to latch bolt 220, and when latch bolt 220 expands and contracts, resistance band 222 moves along with latch bolt 220, the contact position of resistance band 222 and probe 214 changes, and the resistance and voltage between one end of resistance band 222 and probe 214 change.
In order to protect the resistor belt 222, a resistor belt groove 221 is formed on the latch bolt 220, and the resistor belt 222 is fixed in the resistor belt groove 221.
In the present embodiment, the thickness of the resistance band 222 is equal to the depth of the resistance band groove 221, that is, when the resistance band 222 is installed in the resistance band groove 221, the surface of the resistance band 222 is flush with the surface of the locking tongue 220, so as to ensure the locking tongue 220 to smoothly extend and retract.
To facilitate protecting the probe 214, a probe slot 213 is formed in the receiving cavity of the lock cylinder body 210, the probe 214 is fixed in the probe slot 213, and the tip of the probe 214 protrudes out of the probe slot 213 to contact the resistive strip 222.
In order to accurately control the extension of the bolt 220, the lock head further comprises a motor, the detection circuit controls the motor to rotate, and the motor drives the bolt to extend. The detection circuit drives the spring bolt to stretch out and draw back through the motor, realizes the accurate location of spring bolt.
In this embodiment, detection circuitry includes voltage detection circuit and the control unit, and voltage detection circuit detects the voltage between the one end of resistance area and the probe to send the voltage that detects to the control unit, the control unit detects the state of spring bolt according to the voltage that receives, and according to the flexible of spring bolt state control spring bolt. Because the detection voltage is convenient and fast than the detection resistance, therefore, the embodiment controls the stretching of the spring bolt through the voltage between one end of the detection resistance band and the probe.
The resistance of the resistance band is very large (too small a resistance will waste more power), such as 120K Ω. Let the large resistance formed by one end of resistive strip 222 and probe 214 be denoted as R, assuming that when the deadbolt is extended and probe 214 is in contact with point a of resistive strip 222, the resistance between one end of resistive strip 222 and probe 214 is R =10K Ω; when the deadbolt is retracted and the probe pin 214 makes contact with the resistive strip 222 at B, the resistance between one end of the resistive strip 222 and the probe pin 214, R =100K Ω, as shown in fig. 7.
In this embodiment, the probe 214 is connected to a dc power source VCC, and one end of the resistor strip 222 is grounded through a voltage dividing resistor R5; alternatively, one end of the resistor strip 222 is connected to the dc power source VCC, and the probe 214 is grounded through the voltage dividing resistor R5. That is, one end of the resistor R is connected to the dc power source VCC, the other end of the resistor R is grounded through the voltage dividing resistor R5, a connection node between the resistor R and the voltage dividing resistor R5 is a voltage dividing node, a voltage at the voltage dividing node (i.e., a voltage of the voltage dividing resistor R5) is denoted as V5, and V5= VCC R5/(R + R5), as shown in fig. 8. The voltage of the direct current power supply VCC is 5V, and the resistance value of the divider resistor R5 is 100K omega.
The voltage detection circuit mainly comprises a first voltage comparator U1 and a second voltage comparator U2.
A non-inverting input terminal of the first voltage comparator U1 is connected to the voltage dividing node, and an inverting input terminal of the first voltage comparator U1 is connected to a first reference voltage Vref 1; vref1= VCC R2/(R1 + R2), and the output of the first voltage comparator U1 is connected to pin a1 of the control unit. Assume VCC =5V, R1=10K Ω, R2=100K Ω.
The inverting input end of the second voltage comparator U2 is connected with the voltage dividing node, and the non-inverting input end of the second voltage comparator U2 is connected with a second reference voltage Vref 2; vref2= VCC R4/(R3 + R4), and the output of the second voltage comparator U2 is connected to pin a2 of the control unit. The second reference voltage Vref2 is less than the first reference voltage Vref 1. Assume VCC =5V, R3=100K Ω, R4=100K Ω.
The control unit detects the state of the lock tongue according to the output levels of the two voltage comparators and controls the stretching of the lock tongue according to the state of the lock tongue.
The unlocking process is as follows:
(1) after the control unit receives the opening/closing door signal, if the control unit receives a high level signal output by the first voltage comparator U1, it indicates that the lock tongue has been extended to the proper position, and the lock tongue is in the locked state, as shown in fig. 5 and 6, the unlocking operation will be performed.
(2) In the unlocking action, the control unit controls the motor to rotate reversely, the lock tongue gradually retracts inwards, the resistance value of R is gradually increased, and the voltage at the voltage dividing node is gradually reduced; when the deadbolt is retracted and probe 214 is in contact with B of resistive strip 222, R =100K Ω, voltage at voltage divider node V5=5V 100/(100 + 100), V5 < Vref1, V5= Vref2, and first voltage comparator U1 outputs a low level; the bolt continues to retract, the resistance value of R continues to increase, and the voltage at the voltage division node continues to decrease; when the resistance R is larger than 100K omega, the voltage V5 at the voltage division node is smaller than Vref1, V5 is smaller than Vref2, the first voltage comparator U1 outputs low level, the second voltage comparator U2 outputs high level, and when the control unit receives a high level signal output by the second voltage comparator U2, the control unit indicates that the lock tongue retracts to the right position, the lock tongue is in the unlocking to the right position state, and the lock tongue is controlled to stop retracting.
The locking process is as follows:
(1) after the control unit receives the opening/closing signal, if the control unit receives the high level signal output by the second voltage comparator U2, it indicates that the lock tongue has retracted to the proper position, and the lock tongue is in the unlocking proper position, and referring to fig. 3 and 4, the locking operation will be performed. Special cases are as follows: after the control unit receives the opening/closing door signal, if the control unit receives the low level signal output by the first voltage comparator and the low level signal output by the second voltage comparator, the lock tongue is determined to be in an intermediate state, and the locking action is about to be carried out.
(2) In the locking action, the control unit controls the motor to rotate forwards, the lock tongue gradually extends outwards, the resistance value of R is gradually reduced, and the voltage at the voltage division node is gradually increased; when the tongue is extended and the probe 214 is in contact with a of the resistive strip 222, R =10K Ω, the voltage at the voltage dividing node V5=5V × 100/(10 + 100), V5= Vref1, V5 > Vref2, and the second voltage comparator U2 outputs a low level; the bolt continues to extend, the resistance value of R continues to decrease, and the voltage at the voltage division node continues to increase; when the resistance R is less than 10K omega, the voltage V5 at the voltage dividing node is more than Vref1, V5 is more than Vref2, the first voltage comparator U1 outputs high level, and the second voltage comparator U2 outputs low level; when the control unit receives the high level output by the first voltage comparator U1, the bolt is in the extending position, the bolt is in the locking position, and the bolt is controlled to stop extending.
By designing the two voltage comparators and the divider resistor, the control unit can accurately know whether the lock tongue is in place or not, and controls the lock tongue to stop stretching when the lock tongue is in place; and the circuit is simple and practical, and the accuracy is high, can pinpoint the lock position of unblanking, can adapt to all kinds of power and use, and the circuit is stable. Because the voltage comparator has higher precision, can realize the accurate location of spring bolt.
The probe and the resistance belt form a slide rheostat R, the spring bolt stretches and retracts to drive the resistance value of the slide rheostat to change, and the embodiment utilizes the tiny change of the resistance and the principle of the slide rheostat to achieve the accurate positioning of the spring bolt so as to achieve the purpose of accurately unlocking and locking.
As another preferable design of this embodiment, the detection circuit further includes an AD conversion circuit, the voltage detection circuit detects a voltage between one end of the resistance band and the probe, and sends the detected voltage to the AD conversion circuit, and the voltage is converted into a digital signal by the AD conversion circuit and sent to the control unit, and the control unit controls the extension and retraction of the latch bolt according to the received digital signal. The control unit can learn the accurate position information of the spring bolt according to the received digital signal, detect the state of the spring bolt, and realize the accurate positioning of the spring bolt.
In this embodiment, the control unit is an MCU.
Based on the design of the lock head 200, the present embodiment further provides an intelligent lock, which includes a lock body 100 and the lock head 200, wherein a lock head main body 210 of the lock head 200 is fixed to the lock body 100, as shown in fig. 1.
Through design in the intelligence lock the tapered end, detect the state of spring bolt after receiving opening/closing door signal, according to the flexible of the spring bolt state control spring bolt that detects, realize the flexible accurate control of spring bolt, improve the flexible precision of control of spring bolt, realize accurately unblanking and close the lock.
Example II,
The lock head 300 of the embodiment mainly includes a lock head main body 310, a lock tongue 320, a detection circuit, and the like, as shown in fig. 10 to 17; the lock body 310 has a cavity, and the locking bolt 320 is located in the cavity and can extend and retract to unlock and lock.
The detection circuit is used to perform the following steps, as shown in fig. 9.
S1: inputting an opening/closing signal; the detection circuit detects the state of the latch bolt after receiving the opening/closing signal.
S2: the detection circuit detects the state of the lock tongue.
S3: and controlling the action of the lock tongue according to the state of the lock tongue until the lock tongue is in an unlocking in-place state or a locking in-place state.
The detection circuit detects the state of the bolt, and when the door opening signal is input and the bolt is in the lock closing in-place state or the middle state, the step S4 is executed; when the door closing signal is input and the locking bolt is in the unlocking in-place state or the intermediate state, step S5 is executed.
S4: and (4) carrying out unlocking action to control the bolt to retract until the bolt is in an unlocking in-place state.
S5: and locking action is carried out, and the bolt is controlled to extend out until the bolt is in a locking in-place state.
A light emitting unit 322 is fixed on the latch bolt 320, and a first light receiving unit 314 and a second light receiving unit 315 are fixed on the lock body 310; when the latch 320 extends and contracts, the light emitting unit 322 is driven to move.
When the latch 320 retracts into the accommodating cavity, the light emitting unit 322 faces the first light receiving unit 314, light emitted by the light emitting unit 322 is emitted to the first light receiving unit 314, and the first light receiving unit 314 receives a light signal emitted by the light emitting unit 322, generates an electrical signal and sends the electrical signal to the detection circuit.
When the latch 320 extends out of the accommodating cavity by a set length, the light emitting unit 322 faces the second light receiving unit 315, light emitted by the light emitting unit 322 is emitted to the second light receiving unit 315, and the second light receiving unit 315 receives a light signal emitted by the light emitting unit 322, generates an electric signal and sends the electric signal to the detection circuit.
The detection circuit detects the state of the lock tongue according to the received electric signals sent by the first light receiving unit 314 and the second light receiving unit 315, controls the stretching of the lock tongue 320 according to the state of the lock tongue, realizes the precise control of the stretching of the lock tongue, improves the precision of the stretching control of the lock tongue, and realizes the accurate unlocking and locking.
The lock main body 310 is provided with a mounting plate 311, the mounting plate 311 is provided with a screw hole 312, and the mounting plate 311 is fixed with another door or a wall body through a screw; the latch 320 extends out to engage another door or a wall lock hole to lock the door.
The unlocking process is as follows:
(1) the detection circuit controls the light-emitting unit to be powered on and operate after receiving the opening/closing signal, and the light-emitting unit emits a light signal; if the detection circuit receives the electrical signal sent by the second light receiving unit, it indicates that the light emitting unit is facing the second light receiving unit, and indicates that the lock tongue has been extended in place and is in a locked and in-place state, as shown in fig. 14 and 15, an unlocking action is to be performed.
(2) In the unlocking action, the detection circuit controls the bolt 320 to gradually retract inwards, when the bolt 320 retracts into the accommodating cavity, the light-emitting unit 322 is over against the first light-receiving unit 314, the first light-receiving unit 314 receives a light signal emitted by the light-emitting unit 322, generates an electric signal and sends the electric signal to the detection circuit; when the detection circuit receives the electrical signal sent by the first light receiving unit 314, it indicates that the locking bolt 320 is retracted in place, and the locking bolt is in an unlocking in-place state, and the detection circuit controls the locking bolt 320 to stop retracting.
The locking process is as follows:
(1) the detection circuit controls the light-emitting unit to be powered on and operate after receiving the opening/closing signal, and the light-emitting unit emits a light signal; if the detection circuit receives the electrical signal sent by the first light receiving unit, it indicates that the light emitting unit is facing the first light receiving unit, and indicates that the lock tongue has been retracted to the proper position, and the lock tongue is in the unlocking proper position, as shown in fig. 12 and 13, the locking operation will be performed. Special cases are as follows: the detection circuit controls the light-emitting unit to be powered on and operated; if the detection circuit does not receive the electrical signal sent by the first light receiving unit (the light emitting unit is not opposite to the first light receiving unit) or the electrical signal sent by the second light receiving unit (the light emitting unit is not opposite to the second light receiving unit), the lock tongue is in an intermediate state, namely, the lock tongue is extended but not in place, and the locking action is about to be carried out.
(2) In the locking action, the detection circuit controls the locking bolt 320 to gradually extend outwards, when the locking bolt 320 extends out of the accommodating cavity for a set length, the light-emitting unit 322 is over against the second light-receiving unit 315, the second light-receiving unit 315 receives a light signal emitted by the light-emitting unit 322, an electric signal is generated and sent to the detection circuit, when the detection circuit receives the electric signal emitted by the second light-receiving unit 315, the locking bolt 320 extends in place, the locking bolt is in the locking-off in-place state, and the detection circuit controls the locking bolt 320 to stop extending.
In the lock of the present embodiment, the light emitting unit 322 is fixed on the latch 320, and the first light receiving unit 314 and the second light receiving unit 315 are fixed on the lock body 310; when the detection circuit receives the electrical signal sent by the second light receiving unit 315, it indicates that the locking tongue extends in place, and the locking tongue is in a locked state in place, and controls the locking tongue 320 to stop extending; when the detection circuit receives the electrical signal sent by the first light receiving unit 314, it indicates that the locking bolt is retracted to the proper position, and the locking bolt is in the unlocking to the proper position, and controls the locking bolt 320 to stop retracting. The detection circuit learns the position of the lock tongue according to the received electric signals sent by the first light receiving unit 314 and the second light receiving unit 315, detects the state of the lock tongue, controls the stretching of the lock tongue 320 according to the state of the lock tongue, realizes the precise control of the stretching of the lock tongue, improves the precision of the stretching control of the lock tongue, and realizes the accurate unlocking and locking.
In order to protect the light emitting unit 322, a groove 321 is formed on the latch 320, and the light emitting unit 322 is fixed in the groove 321.
In this embodiment, a light-transmitting protective cover 323 is disposed at the opening of the groove 321 for protecting the light-emitting unit 322, so as to prevent the light emitted by the light-emitting unit 322 from being interfered by the outside, thereby preventing dust and interference.
In order to facilitate protection of the first light receiving unit 314 and the second light receiving unit 315, a placement groove 313 is formed in the receiving cavity of the cylinder body 310, the first light receiving unit 314 is fixed to one end of the placement groove 313, and the second light receiving unit 315 is fixed to the other end of the placement groove 313.
In order to facilitate the first and second light receiving units 314 and 315 to be fixed in the placement groove 313, the first and second light receiving units 314 and 315 are integrated on the PCB 316, the first light receiving unit 314 is located at one end of the PCB 316, the second light receiving unit 315 is located at the other end of the PCB 316, and the PCB 316 is fixed in the placement groove 313.
In order to accurately control the extension of the lock bolt, the lock head further comprises a motor, the detection circuit controls the motor to rotate, and the motor drives the lock bolt to extend. The detection circuit drives the spring bolt to stretch out and draw back through the motor, realizes the accurate location of spring bolt.
As a preferable design of this embodiment, the light emitting unit 322 is an infrared emitter, and both the first light receiving unit 314 and the second light receiving unit 315 are infrared receivers. The light emitting unit 322 emits an infrared signal, and the first light receiving unit 314 or the second light receiving unit 315 receives the infrared signal, generates an electrical signal according to the received infrared signal, and sends the electrical signal to the detection circuit. Infrared emitter emits infrared light pillar smaller than 1mm, is received by infrared receiver smaller than 1 mm.
If the second light receiving unit 315 receives the infrared signal, an electrical signal is sent to the pin P2 of the detection circuit, and when the pin P2 of the detection circuit receives the electrical signal sent by the second light receiving unit 315, it indicates that the latch bolt 320 extends in place, and the latch bolt is in a state of being locked in place, and the latch bolt 320 is controlled to stop extending.
If the first light receiving unit 314 receives the infrared signal, an electrical signal is sent to the pin P1 of the detection circuit, and when the pin P1 of the detection circuit receives the electrical signal sent by the first light receiving unit 314, it indicates that the locking bolt 320 is retracted in place, and the locking bolt is in an unlocking in-place state, and the locking bolt 320 is controlled to stop retracting.
If neither the first light receiving unit 314 nor the second light receiving unit 315 receives the infrared signal, the detection circuit does not receive the electrical signal sent by the first light receiving unit and the second light receiving unit, which indicates that the lock tongue is in the intermediate state.
The infrared transmitter and the infrared receiver have low cost, stable performance and high precision, and can realize reliable and accurate positioning of the lock tongue; the accurate positioning of the lock tongue is realized through one infrared transmitter and two infrared receivers, the structure is simple, and the cost is low. The protective cover 323 prevents infrared light emitted by the infrared emitter from being interfered, ensures that the infrared receiver accurately receives the infrared light, and ensures stable transmission of optical signals, so as to achieve the purpose of accurately positioning the position of the lock bolt.
In this embodiment, the lock head further includes a trigger unit, the trigger unit sends a trigger signal to the detection circuit, and the detection circuit controls the light-emitting unit to be powered on according to the received trigger signal. In the present embodiment, the trigger unit includes a bluetooth chip, an RFID chip, a touch chip, and the like. The user sends a trigger signal to the detection circuit through the trigger unit, and the detection circuit controls the light-emitting unit to be powered on and run after receiving the trigger signal. That is, the light-emitting unit is only triggered to wake up when in use, and the rest time is in a sleep state, so that the purposes of energy saving and power saving are achieved.
When the light-emitting unit is turned on for a set time, the light-emitting unit is turned off, and the light-emitting unit needs to be triggered again to be turned on, so that the problem that the electric energy is wasted due to the fact that the motor is not moved or the light-emitting unit breaks down is solved.
In this embodiment, the detection circuit controls the power-on or off of the light emitting unit through the switch circuit. In the present embodiment, referring to fig. 16, the switch circuit includes an NPN transistor Q1 and a PNP transistor Q2, the base of Q1 is connected to the detection circuit, the collector of Q1 is connected to the dc power supply, the emitter of Q1 is connected to the light emitting unit, the emitter of Q1 is connected to the emitter of Q2, the collector of Q2 is grounded, and the base of Q2 is connected to the detection circuit. When the detection circuit sends a high level to the bases of the Q1 and the Q2, the Q1 is conducted, the Q2 is turned off, the current provided by the direct current power supply is transmitted to the light-emitting unit through the switch path of the Q1 to supply power to the light-emitting unit, and the light-emitting unit is powered on to operate. When the detection circuit sends low level to the bases of Q1 and Q2, Q1 is turned off, the current provided by the DC power supply cannot be transmitted to the light-emitting unit, and the light-emitting unit is powered off.
In daily use, the whole work flow is as follows: (assuming that the RFID is triggered to unlock, the initial state of the door is the locked state)
(1) The RFID receives the opening/closing signal and then sends a trigger signal, the detection circuit receives the trigger signal and then controls the light-emitting unit to be powered on and operate, and the light-emitting unit sends a light signal. If the detection circuit receives the electric signal sent by the second light receiving unit, the situation that the lock tongue is stretched out in place at the moment is known, the lock tongue is in a locked state in place, and unlocking action is to be carried out.
(2) And (3) unlocking action: the detection circuit controls the motor to rotate reversely, and the motor drives the lock tongue to retract inwards gradually. In this process, the light emitting unit is turned on until the first light receiving unit receives the light signal and the light emitting unit is turned off. The first light receiving unit receives the light signal, generates an electric signal and sends the electric signal to the detection circuit. When the detection circuit receives an electric signal sent by the first light receiving unit, the situation that the spring bolt retracts in place at the moment is known, the spring bolt is in an unlocking in-place state, the detection circuit controls the motor to stop rotating, and the spring bolt stops retracting.
(3) And inputting the opening/closing signal again, sending a trigger signal after the RFID receives the opening/closing signal, controlling the light-emitting unit to be powered on and run after the detection circuit receives the trigger signal, and sending a light signal by the light-emitting unit. If the detection circuit receives the electric signal sent by the first light receiving unit, the situation that the lock bolt retracts in place at the moment is known, the lock bolt is in an unlocking in-place state, and the locking action is required to be carried out.
(4) Performing locking action: the detection circuit controls the motor to rotate forwards, and the motor drives the lock tongue to extend out gradually. In this process, the light emitting unit is turned on until the second light receiving unit receives the light signal and the light emitting unit is turned off. The second light receiving unit receives the light signal, generates an electric signal and sends the electric signal to the detection circuit. When the detection circuit receives an electric signal sent by the second light receiving unit, the fact that the spring bolt extends in place at the moment is known, the spring bolt is in a locked state, the detection circuit controls the motor to stop rotating, and the spring bolt stops extending.
In this embodiment, the detection circuit is an MCU.
Based on the design of the lock head 300, the embodiment further provides an intelligent lock, which includes a lock body 100 and the lock head 300, wherein the lock head main body 310 of the lock head 300 is fixed with the lock body 100.
Through design in the intelligence lock the tapered end, detect the state of spring bolt after receiving opening/closing door signal, according to the flexible of the spring bolt state control spring bolt that detects, realize the flexible accurate control of spring bolt, improve the flexible precision of control of spring bolt, realize accurately unblanking and close the lock.
Example III,
The present embodiment is different from the second embodiment in that: the light emitting unit 322 is a light emitting diode, and the first light receiving unit 314 and the second light receiving unit 315 are photodiodes.
The light emitting diode emits light, the photodiode is turned on when receiving light, the light signal is converted into an electrical signal, and the detection circuit can know whether the first light receiving unit 314 and the second light receiving unit 315 are turned on when receiving light according to the received electrical signal. The light emitting diode and the photosensitive diode have stable performance and low cost, and ensure the stable transmission of optical signals so as to achieve the aim of accurately positioning the position of the lock tongue.
If the second light receiving unit 315 is turned on by light, a high level is sent to the pin P2 of the detection circuit, and when the pin P2 of the detection circuit receives the high level sent by the second light receiving unit 315, it indicates that the light emitting unit 322 is facing the second light receiving unit 315, and indicates that the latch bolt 320 is extended in place, and the latch bolt is in a locked state in place, and the latch bolt 320 is controlled to stop extending.
If the first light receiving unit 314 is turned on by light, a high level is sent to the pin P1 of the detection circuit, and when the pin P1 of the detection circuit receives the high level sent by the first light receiving unit 314, it indicates that the light emitting unit 322 is facing the first light receiving unit 314, and indicates that the latch bolt 320 is retracted in place, and the latch bolt is in the state of being unlocked in place, so as to control the latch bolt 320 to stop retracting.
If neither the first light receiving unit 314 nor the second light receiving unit 315 sends a high level to the detection circuit, when the pin P1 of the detection circuit receives a low level sent by the first light receiving unit 314, the pin P2 of the detection circuit receives a low level sent by the second light receiving unit, which indicates that the light emitting unit 322 is not facing the first light receiving unit 314 nor the second light receiving unit 315, and indicates that the latch is in the intermediate state.
Referring to fig. 17, the anode of the first light receiving unit LED1 is connected to a dc power supply, the cathode of the first light receiving unit LED1 is grounded via a pull-down resistor R1, and the cathode of the first light receiving unit LED1 is connected to a pin P1 of the detection circuit. When the first light receiving unit LED1 receives the light signal from the light emitting unit, the first light receiving unit LED1 is turned on by light, the cathode of the first light receiving unit LED1 is at high level, and the high level is sent to the pin P1 of the detection circuit; when the first light receiving unit LED1 does not receive the light signal from the light emitting unit, the first light receiving unit LED1 is turned off, the cathode of the first light receiving unit LED1 is at low level, and the low level is sent to the pin P1 of the detection circuit. The detection circuit can know whether the first light receiving unit LED1 receives the light signal according to the high-low level received by the pin P1, that is, whether the light emitting unit is facing the first light receiving unit LED 1.
The anode of the second light receiving unit LED2 is connected to a dc power supply, the cathode of the second light receiving unit LED2 is grounded via another pull-down resistor R2, and the cathode of the second light receiving unit LED2 is connected to the pin P2 of the detection circuit. When the second light receiving unit LED2 receives the light signal from the light emitting unit, the second light receiving unit LED2 is turned on by light, the cathode of the second light receiving unit LED2 is at a high level, and the high level is sent to the pin P2 of the detection circuit; when the second light receiving unit LED2 does not receive the light signal from the light emitting unit, the second light receiving unit LED2 is turned off, the cathode of the second light receiving unit LED2 is at low level, and the low level is sent to the pin P2 of the detection circuit. The detection circuit can know whether the second light receiving unit LED2 receives the light signal according to the high-low level received by the pin P2, that is, whether the light emitting unit is facing the second light receiving unit LED 2. By adopting the design, the detection circuit can know whether the light-emitting unit is over against the first light-receiving unit and the second light-receiving unit or not according to the received high and low levels, and can know the position of the lock tongue.
The unlocking process is as follows:
(1) the detection circuit controls the light-emitting unit to be powered on and operate after receiving the opening/closing signal, and the light-emitting unit emits a light signal; if the detection circuit receives the high level signal sent by the second light receiving unit, the light emitting unit is right opposite to the second light receiving unit, the lock tongue is judged to be in the lock closing in-place state, and the unlocking action is about to be carried out.
(2) In the unlocking action, the detection circuit controls the spring bolt to gradually retract inwards, when the detection circuit receives a high level signal sent by the first light receiving unit, the spring bolt is retracted in place, the spring bolt is in the unlocking in-place state, and the detection circuit controls the spring bolt to stop retracting.
The locking process is as follows:
(1) the detection circuit controls the light-emitting unit to be powered on and operate after receiving the opening/closing signal, and the light-emitting unit emits a light signal; if the detection circuit receives a high level signal sent by the first light receiving unit, the light emitting unit is over against the first light receiving unit, and the lock bolt is judged to be in an unlocking in-place state; a locking action is to be performed. Special cases are as follows: the detection circuit controls the light-emitting unit to be powered on and operated, and if the detection circuit receives a low level signal sent by the first light receiving unit and a low level signal sent by the second light receiving unit, the lock tongue is judged to be in an intermediate state, and the locking action is about to be carried out.
(2) In the locking action, the detection circuit controls the spring bolt to gradually extend outwards, when the detection circuit receives a high level signal sent by the second light receiving unit, the spring bolt is indicated to extend in place, the spring bolt is in the locking in place state, and the detection circuit controls the spring bolt to stop extending.
In this embodiment, the detection circuit is an MCU.
Based on the design of the lock head 300, the embodiment further provides an intelligent lock, which includes a lock body 100 and the lock head 300, wherein the lock head main body 310 of the lock head 300 is fixed with the lock body 100.
Through design in the intelligence lock the tapered end, detect the state of spring bolt after receiving opening/closing door signal, according to the flexible of the spring bolt state control spring bolt that detects, realize the flexible accurate control of spring bolt, improve the flexible precision of control of spring bolt, realize accurately unblanking and close the lock.
It should be noted that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should also make changes, modifications, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. A lock head is characterized in that: the method comprises the following steps:
a lock body having an accommodation cavity;
the lock tongue is positioned in the accommodating cavity;
a detection circuit for detecting a state of the latch bolt after receiving the opening/closing signal;
if a door opening signal is received and the lock tongue is in a lock closing in-place state or an intermediate state, unlocking is carried out, and the lock tongue is controlled to retract until the lock tongue is in an unlocking in-place state;
if the door closing signal is received and the lock tongue is in the unlocking in-place state or the middle state, the locking action is carried out, and the lock tongue is controlled to extend out until the lock tongue is in the locking in-place state.
2. The lock cylinder according to claim 1, wherein: the lock is characterized in that a resistance band/probe is arranged on the lock tongue, a probe/resistance band is arranged on the lock head main body, and when the lock tongue stretches, the probe is in sliding contact with the resistance band;
the detection circuit detects the resistance/voltage between one end of the resistance band and the probe, and detects the state of the lock tongue according to the detected resistance/voltage.
3. The lock cylinder according to claim 2, characterized in that:
a resistor belt groove is formed in the lock tongue, and the resistor belt is fixed in the resistor belt groove;
and a probe groove is formed in the accommodating cavity, and the probe is fixed in the probe groove.
4. The lock cylinder according to claim 2, characterized in that: the detection circuit comprises a voltage detection circuit and a control unit, the voltage detection circuit detects the voltage between one end of the resistance band and the probe and sends the detected voltage to the control unit, and the control unit detects the state of the lock tongue according to the received voltage.
5. The lock cylinder according to claim 4, characterized in that: the probe is connected with a direct current power supply, and one end of the resistance band is grounded through a divider resistor; or one end of the resistance band is connected with a direct current power supply, and the probe is grounded through a divider resistor;
the voltage detection circuit comprises a first voltage comparator and a second voltage comparator;
a positive phase input end of the first voltage comparator is connected with a voltage division node, and an inverted phase input end of the first voltage comparator is connected with a first reference voltage; the output end of the first voltage comparator is connected with the control unit;
the inverting input end of the second voltage comparator is connected with a voltage division node, and the non-inverting input end of the second voltage comparator is connected with a second reference voltage; the output end of the second voltage comparator is connected with the control unit;
the control unit detects the state of the lock tongue according to the output levels of the two voltage comparators:
if the control unit receives a high level signal output by the first voltage comparator, the lock tongue is judged to be in a locking in-place state;
if the control unit receives a high level signal output by the second voltage comparator, the lock bolt is judged to be in an unlocking in-place state;
if the control unit receives that the output signals of the first voltage comparator and the second voltage comparator are both low level signals, the lock tongue is judged to be in the middle state.
6. The lock cylinder according to claim 2, characterized in that: the detection circuit further comprises an AD conversion circuit, the voltage detection circuit sends the detected voltage to the AD conversion circuit, the AD conversion circuit converts the detected voltage into a digital signal and sends the digital signal to the control unit, and the control unit detects the state of the lock tongue according to the received digital signal.
7. The lock cylinder according to claim 1, wherein:
a light-emitting unit is fixed on the lock tongue, and a first light receiving unit and a second light receiving unit are fixed on the lock head main body;
when the lock tongue is retracted into the accommodating cavity, the light-emitting unit is over against the first light-receiving unit, and the first light-receiving unit receives the light signal emitted by the light-emitting unit, generates an electric signal and sends the electric signal to the detection circuit;
when the lock tongue extends out of the accommodating cavity by a set length, the light-emitting unit is over against a second light-receiving unit, and the second light-receiving unit receives light signals emitted by the light-emitting unit, generates electric signals and sends the electric signals to the detection circuit;
the detection circuit detects the state of the bolt according to the received electric signals sent by the first light receiving unit and the second light receiving unit.
8. The lock cylinder according to claim 7, characterized in that: the light emitting unit is an infrared emitter, and the first light receiving unit and the second light receiving unit are both infrared receivers;
if the detection circuit receives the electric signal sent by the second light receiving unit, the lock tongue is judged to be in the locked state;
if the detection circuit receives the electric signal sent by the first light receiving unit, the lock bolt is judged to be in an unlocking in-place state;
and if the detection circuit does not receive the electric signals sent by the first light receiving unit and the second light receiving unit, the lock tongue is judged to be in the middle state.
9. The lock cylinder according to claim 7, characterized in that: the light emitting unit is a light emitting diode, and the first light receiving unit and the second light receiving unit are photosensitive diodes;
the anode of the first light receiving unit is connected with a direct current power supply, the cathode of the first light receiving unit is grounded through a pull-down resistor, and the cathode of the first light receiving unit is connected with a detection circuit;
the anode of the second light receiving unit is connected with a direct current power supply, the cathode of the second light receiving unit is grounded through another pull-down resistor, and the cathode of the second light receiving unit is connected with the detection circuit;
if the detection circuit receives a high level signal sent by the second light receiving unit, the lock tongue is judged to be in a locking in-place state;
if the detection circuit receives a high level signal sent by the first light receiving unit, the lock bolt is judged to be in an unlocking in-place state;
and if the detection circuit receives low level signals sent by the first light receiving unit and the second light receiving unit, the bolt is judged to be in the middle state.
10. An intelligent lock, its characterized in that: comprising a lock body and a lock cylinder according to any one of claims 1 to 9, the lock cylinder body of which is fixed to the lock body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911377803.8A CN110984708A (en) | 2019-12-27 | 2019-12-27 | Tapered end and intelligent lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911377803.8A CN110984708A (en) | 2019-12-27 | 2019-12-27 | Tapered end and intelligent lock |
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| CN110984708A true CN110984708A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911377803.8A Pending CN110984708A (en) | 2019-12-27 | 2019-12-27 | Tapered end and intelligent lock |
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| CN (1) | CN110984708A (en) |
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Application publication date: 20200410 |