Lock body control circuit, door lock and door

Abstract

The utility model relates to the technical field of door locks, and discloses a lock body control circuit, a door lock and a door, the lock body control circuit comprises a switch unit, the control end of the switch unit is connected with a latch bolt of a lock body, and the control end of the switch unit is further connected with the first end of the latch bolt of the lock body; a first output end, a second output end and a third output end of the control unit are respectively connected with a first input end, a second input end and a third input end of the control unit; a fourth input end of the control unit inputs an unlocking signal, and a first output end and a second output end of the control unit are respectively connected with a first control end and a second control end of the driving unit; the output end of the driving unit is connected with the control end of the spring bolt, and the driving unit is used for driving the spring bolt to stretch out or retract. The circuit is simple in structure, low in cost and capable of enabling the door lock to keep an efficient opening and closing process and good safety performance.

Description

Technical Field

[0001] The utility model relates to the technical field of door locks, and in particular to a lock body control circuit, a door lock and a door. Background Art

[0002] Common door locks require manual locking and unlocking. As people's requirements for door locks become higher and higher, manual door locks can no longer meet people's needs. In door lock security systems, the demand for automatic locks is increasing. Existing automatic lock systems often rely on complex electronic equipment and software, which may lead to increased costs and complex operations. Therefore, it is of great significance to develop a simple, economical and efficient automatic lock system. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to solve the problem of complex structure and high cost of the lock body control circuit in the prior art, thereby providing a lock body control circuit, a door lock and a door.

[0004] In order to achieve the above object, the utility model provides the following technical solutions:

[0005] In the first aspect, the utility model provides a lock body control circuit, comprising: a switch unit, a control unit and a drive unit, wherein the switch unit, a control end of which is connected to the oblique tongue of the lock body, and the control end of which is also connected to the first end of the lock tongue of the lock body, and the first output end, the second output end and the third output end of which are respectively connected to the first input end, the second input end and the third input end of the control unit; the control unit, a fourth input end of which inputs an unlocking signal, and the first output end and the second output end of which are respectively connected to the first control end and the second control end of the drive unit; the drive unit, an output end of which is connected to the control end of the lock tongue, is used to drive the lock tongue to extend or retract; the control unit controls the drive unit to drive the lock tongue to retract to a first preset position based on the unlocking signal; when the oblique tongue is retracted by an external force so that the switch unit switches the switch state, the switch unit is charged; when the oblique tongue resumes its extension so that the switch unit switches the switch state, the switch unit is discharged so that after the first input end of the control unit switches the level state, the control unit controls the drive unit to drive the lock tongue to extend to a second preset position.

[0006] The lock body control circuit provided by the utility model has a switch unit that can quickly switch the switch state according to the extension and retraction state of the lock tongue and the inclined tongue, so that the control unit can quickly control the drive unit based on the level signal output by the switch unit, thereby realizing efficient unlocking or locking of the lock body. The utility model only adopts a hardware structure, can quickly respond to changes in electrical signals, does not rely on complex electronic equipment and software, has a simple structure, and reduces manufacturing costs and maintenance costs.

[0007] In an optional embodiment, the switch unit includes: a first switch unit and a second switch unit, wherein the first switch unit, a control end of which is connected to the inclined tongue, and an output end of which is connected to the first input end of the control unit; the second switch unit, a control end of which is connected to the first end of the lock tongue, and a first output end and a second output end of which are respectively connected to the second input end and the third input end of the control unit; when the control unit controls the driving unit to drive the lock tongue to retract to the first preset position based on the unlocking signal, the first switch unit and the second switch unit switch the switch state, so that the control unit controls the driving unit to stop working; when the inclined tongue is retracted by an external force so that the first switch unit switches the switch state, the first switch unit is charged; when the inclined tongue resumes its extension so that the first switch unit switches the switch state, the first switch unit discharges so that the first input end of the control unit switches the level state, and the control unit controls the driving unit to drive the lock tongue to extend to the second preset position, and then the second switch unit switches the switch state, so that the control unit controls the driving unit to stop working.

[0008] The utility model provides a lock body control circuit, in which the first switch unit and the second switch unit switch the switch state based on the extension and retraction state of the inclined tongue and the lock tongue respectively, and the control unit can comprehensively and accurately judge the current state of the lock body through the inclined tongue and the lock tongue, thereby reducing the possibility of misjudgment and improving the accuracy of the control unit response.

[0009] In an optional embodiment, the first switch unit includes: a first switch circuit, a second switch circuit and an output circuit, wherein the first switch circuit, a control end of which is connected to the inclined tongue, a first end of which is connected to the first end of the second switch circuit, and a second end of which is connected to the first power supply; the second switch circuit, a control end of which is connected to the inclined tongue, and a second end of which is connected to the input end of the output circuit; the output circuit, a second end of which is connected to the first power supply, and a second end of which is connected to the first input end of the control unit; when the control unit controls the driving unit to drive the lock tongue to retract to the first preset position based on the unlocking signal, the first switch circuit and the second switch circuit switch the switch state, so that the control unit drives the driving unit to stop working; when the inclined tongue is retracted by external force so that the first switch circuit and the second switch circuit switch the switch state, the first switch circuit is charged; when the inclined tongue resumes its extension so that the first switch circuit switches the switch state, the first switch circuit discharges to the output circuit.

[0010] In an optional embodiment, the first switching circuit includes: a first resistor, a first capacitor, a single-pole double-throw switch and a current limiting circuit, wherein the first resistor, a first end of which is connected to the first end of the first capacitor and the first end of the single-pole double-throw switch, and a second end of which is connected to the second end of the first capacitor and then grounded; the single-pole double-throw switch, a second end of which is connected to the first end of the second switching circuit, and a third end of which is connected to the first end of the current limiting circuit, and is used to switch the switch state based on the extension and retraction state of the inclined tongue; the current limiting circuit, a second end of which is connected to the first power supply, and is used to limit the current between the first power supply and the single-pole double-throw switch; when the inclined tongue is contracted by external force, the first end of the single-pole double-throw switch is connected to its third end, and the second switching circuit switches the switch state, so that the first power supply charges the first capacitor; when the inclined tongue resumes extension, the first end of the single-pole double-throw switch is connected to its second end, so that the first capacitor is discharged to the output circuit through the single-pole double-throw switch and the second switching circuit.

[0011] In an optional embodiment, the output circuit includes: a filter circuit and a third switching circuit, wherein the filter circuit has a first end connected to the control end of the third switching circuit and the second end of the second switching circuit, and a second end connected to the first end of the third switching circuit and then grounded, and is used to filter out interference signals from the control end of the third switching circuit; the third switching circuit has a second end connected to the first power supply, and an output end connected to the first input end of the control unit, and is used to flip the level signal of its control end and transmit it to the control unit.

[0012] In an optional embodiment, the second switch unit includes: a fourth switch circuit and a fifth switch circuit, wherein the fourth switch circuit has a control end connected to the first end of the lock tongue, a first end connected to the first end of the fifth switch circuit, and a second end connected to the second input end of the control unit; the fifth switch circuit has a control end connected to the first end of the lock tongue, and a second end connected to the third input end of the control unit; when the control unit controls the driving unit to drive the lock tongue to retract to the first preset position based on the unlocking signal, the first switch unit, the fourth switch circuit and the fifth switch circuit switch the switch state, so that the control unit drives the driving unit to stop working; when the control unit drives the driving unit to drive the lock tongue to extend to the second preset position, the fourth switch circuit and the fifth switch circuit switch the switch state, so that the control unit drives the driving unit to stop working.

[0013] In an optional embodiment, the driving unit includes: a driving circuit and a motor, wherein the driving circuit, a first control end and a second control end are respectively connected to the first output end and the second output end of the control unit, and the output end is connected to the control end of the motor; the motor, an output end of which is connected to the control end of the lock tongue, is used to drive the lock tongue to extend or retract; when the control unit receives an unlocking signal, the control unit drives the driving circuit to drive the motor to reverse; when the internal capacitor of the switching unit is discharged, the control unit drives the driving circuit to drive the motor to rotate forward; when the lock tongue retracts to a first preset position or extends to a second preset position, the control unit drives the driving circuit to stop working.

[0014] In an optional embodiment, the lock body control circuit also includes: a motor current detection unit, whose input end is connected to the detection end of the drive circuit, and whose output end is connected to the fifth input end of the control unit, and is used to detect the current signal when the motor is running.

[0015] In the lock body control circuit provided by the utility model, the motor current detection unit can accurately judge whether the motor fails according to the current signal of the motor, thereby improving the reliability of the lock body control circuit.

[0016] In the second aspect, the utility model provides a door lock, comprising: a lock tongue, a tilted tongue, a door lock body and the lock body control circuit of the first aspect, wherein the lock tongue, a control end of which is connected to the output end of the driving unit, and a first end of which is connected to the control end of the switch unit; the tilted tongue, a control end of which is connected to the control end of the switch unit; the lock tongue and the tilted tongue are connected to the door lock body; the control unit controls the driving unit to drive the lock tongue to retract to a first preset position based on an unlocking signal, and then the door lock is unlocked; the control unit controls the driving unit to drive the lock tongue to extend to a second preset position, and then the door lock is locked.

[0017] The door lock provided by the utility model has a switch unit in the lock body control circuit which can quickly switch the switch state according to the extension and retraction state of the lock tongue and the inclined tongue, so that the control unit can quickly control the drive unit based on the level signal output by the switch unit, thereby realizing efficient unlocking or locking of the door lock. The door lock control circuit of the utility model only adopts a hardware structure, and the door lock can quickly respond to changes in electrical signals, thereby improving the efficiency of unlocking and locking, and the door lock has a simple structure, thereby reducing the manufacturing cost and maintenance cost of the door lock.

[0018] In the third aspect, the utility model provides a door, comprising: a door body, a door opener and a door lock of the third aspect, wherein the door lock is embedded in the side of the door body; the door opener has a control end connected to the third output end of the control unit, and a first end connected to the door body; when the door lock is unlocked, the control unit controls the door opener to open the door body.

[0019] The switch unit in the lock body control circuit of the door provided by the utility model can quickly switch the switch state according to the extension and retraction state of the lock tongue and the inclined tongue, so that the control unit can quickly control the drive unit based on the level signal output by the switch unit, thereby realizing efficient unlocking or locking of the door lock. After the door lock is unlocked, the control unit can automatically control the door opener to open the door, realizing automatic door opening control. The door lock control circuit of the utility model only adopts a hardware structure, the door lock can quickly respond to changes in electrical signals, and the door lock has a simple structure, which reduces the manufacturing cost and maintenance cost of the door. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A composition diagram of a specific example of a lock body control circuit according to an embodiment of the present utility model;

[0022] Figure 2 It is a composition diagram of another specific example of the lock body control circuit of the embodiment of the utility model;

[0023] Figure 3 A structural diagram of a specific circuit of a control unit of an embodiment of the utility model;

[0024] Figure 4 A structural diagram of a specific circuit of the first switch unit of an embodiment of the utility model;

[0025] Figure 5 A structural diagram of a specific circuit of the second switch unit of an embodiment of the utility model;

[0026] Figure 6 A structural diagram of a specific circuit of a driving unit according to an embodiment of the utility model;

[0027] Figure 7 A structural diagram of a specific circuit of a motor current detection unit according to an embodiment of the utility model;

[0028] Figure 8 A structural diagram of a specific circuit of a power conversion circuit according to an embodiment of the utility model;

[0029] Fig. 9 A composition diagram of a specific example of a door lock according to an embodiment of the present utility model;

[0030] Fig.10This is a composition diagram of a specific example of a door according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] In the related art, the automatic lock system often relies on complex electronic equipment and software, which may lead to increased costs and complicated operations. Simplified structures often lead to the automatic lock body being accidentally unlocked or locked, reducing user experience and safety.

[0036] This embodiment provides a lock body control circuit 11, such as Figure 1 As shown, it includes: a switch unit 111, a control unit 112 and a drive unit 113.

[0037] like Figure 1As shown, the switch unit 111 has a control end connected to the inclined tongue 12 of the lock body, and its control end is also connected to the first end of the lock tongue 13 of the lock body, and its first output end, second output end and third output end are respectively connected to the first input end, second input end and third input end of the control unit 112.

[0038] Optionally, Figure 1 In the embodiment, a plurality of touch switches are arranged in the switch unit 111, and the buttons of the touch switches are in contact with the inclined tongue 12 and the locking tongue 13. When the extension and retraction state of the inclined tongue 12 or the locking tongue 13 changes, the buttons of the touch switches in contact therewith are driven to act, thereby changing the switch state of the switch unit 111, so that the level signal of the corresponding output end of the switch unit 111 jumps.

[0039] like Figure 1 As shown, the control unit 112 has a fourth input terminal that inputs an unlocking signal, and a first output terminal and a second output terminal thereof are connected to a first control terminal and a second control terminal of the driving unit 113 respectively.

[0040] Specifically, Figure 1 When the level signal at the input end of the control unit 112 jumps, the control unit 112 comprehensively determines the level status of all input ends to determine whether to lock or unlock, and outputs the corresponding control signal to the drive unit 113; when the control unit 112 comprehensively determines the level status of all input ends to determine that it is not necessary to unlock or lock, it does not output the control signal.

[0041] For example, Figure 1 In the embodiment, the control unit 112 has the following four output states based on the level states of all input terminals:

[0042] (1) When the first input terminal and the second input terminal of the control unit 112 receive high-level signals and the third input terminal and the fourth input terminal receive low-level signals, the first output terminal and the second output terminal are both low-level, and the driving unit 113 does not work.

[0043] (2) When the control unit 112 receives the unlocking signal, its fourth input terminal changes from a low level to a high level, and then it outputs a high level signal and a low level signal to the first control terminal and the second control terminal of the driving unit 113, respectively, so that the driving unit 113 drives the lock tongue 13 to retract.

[0044] (3) When the first input terminal and the third input terminal of the control unit 112 receive a high-level signal, and the second input terminal and the fourth input terminal receive a low-level signal, the first output terminal and the second output terminal are both at a low level, and the driving unit 113 does not work. (4) When the first input terminal, the second input terminal and the fourth input terminal of the control unit 112 receive a low-level signal, and the third input terminal receives a high-level signal, it outputs a low-level signal and a high-level signal to the first control terminal and the second control terminal of the driving unit 113, respectively, so that the driving unit 113 drives the lock tongue 13 to extend.

[0045] Optionally, the control unit 112 of this embodiment switches the output state based on the input terminal level state, which can be adjusted according to actual needs and is not limited to the above-mentioned level conversion logic.

[0046] Figure 1 In the embodiment, the driving unit 113 has an output end connected to the control end of the lock tongue 13, and is used to drive the lock tongue 13 to extend or retract.

[0047] Specifically, Figure 1 When the control unit 112 receives the unlocking signal, it controls the driving unit 113 to operate, thereby driving the lock tongue 13 to retract to the first preset position, so that the lock body is unlocked.

[0048] Specifically, Figure 1 In the embodiment, when the inclined tongue 12 is contracted by an external force, it indicates that the inclined tongue 12 is squeezed by the edge of the inclined tongue groove and the lock body is ready to be locked, and some of the contact switches in the switch unit 111 switch the switch state, so that the energy storage unit in the switch unit 111 starts to charge; when the inclined tongue 12 resumes its extension, it indicates that the inclined tongue 12 has completely entered the lock tongue groove or extended to the third preset position, and some of the contact switches in the switch unit 111 switch the switch state, so that after the energy storage unit in the switch unit 111 is discharged, the first input end of the control unit 112 switches the level state, thereby controlling the driving unit 113 to drive the lock tongue 13 to extend to the second preset position, so that the lock body is completely locked.

[0049] Optionally, the first preset position can be a position where the lock tongue retracts to the limit, or any position where the lock tongue is out of the lock tongue groove. The second preset position can be a position where the lock tongue extends to the limit, or any position where the lock tongue extends into the lock tongue groove.

[0050] It should be noted that programming the control unit so that the control unit can switch the output state according to the preset logic based on the input level state is a common technical means in the field. Those skilled in the art can program the control unit according to the mature lock body control program in the prior art and in combination with actual needs, and adjust the unlocking and locking logic. That is, this embodiment only protects the structure of the lock body control circuit, and does not protect the internal control logic and unlocking and locking methods of the control unit.

[0051] The lock body control circuit provided in this embodiment has a switch unit that can quickly switch the switch state according to the extension and retraction state of the lock tongue and the inclined tongue, so that the control unit can quickly control the drive unit based on the level signal output by the switch unit, thereby achieving efficient unlocking or locking of the lock body. This embodiment only adopts a hardware structure, can quickly respond to changes in electrical signals, and has a simple structure, thereby reducing manufacturing costs and maintenance costs.

[0052] In some optional embodiments, such as Figure 2 As shown, the switch unit 111 includes: a first switch unit 1111 and a second switch unit 1112, wherein the first switch unit 1111 has a control end connected to the latch tongue 12, and an output end connected to a first input end of the control unit 112; the second switch unit 1112 has a control end connected to a first end of the latch tongue 13, and a first output end and a second output end connected to a second input end and a third input end of the control unit 112, respectively.

[0053] Specifically, Figure 2 In the embodiment, the first switch unit 1111 and the second switch unit 1112 can switch the on and off states according to the extension and retraction states of the inclined tongue 12 and the locking tongue 13, respectively, that is, the first switch unit 1111 and the second switch unit 1112 can include any kind of mechanical touch switch.

[0054] For example, taking a button-type tact switch as an example, the button is mechanically connected to the inclined tongue 12 or the locking tongue 13. When the inclined tongue 12 or the locking tongue 13 is extended or retracted, the button is driven to open or close the normally closed contacts and the normally open contacts in the button-type tact switch, thereby causing the first switch unit 1111 and the second switch unit 1112 to switch the switch state.

[0055] Specifically, Figure 2 When the control unit 112 receives an unlocking signal, it controls the driving unit 113 to operate, thereby driving the lock tongue 13 to retract to the first preset position, and then the first switch unit 1111 and the second switch unit 1112 switch the switch state, so that the control unit 112 controls the driving unit 113 to stop working, so that the lock body is unlocked. At this time, the first switch unit 1111 and the second switch unit 1112 maintain this switch state when the lock body is unlocked.

[0056] Specifically, Figure 2In the embodiment, when the inclined tongue 12 is contracted by an external force, it indicates that the inclined tongue 12 is squeezed by the edge of the inclined tongue groove and the lock body is ready to be locked, and the first switch unit 1111 switches the switch state to start charging; when the inclined tongue 12 resumes its extension, it indicates that the inclined tongue 12 has completely entered the lock tongue groove or extended to the third preset position, and the first switch unit 1111 switches the switch state to start discharging so that the first input end of the control unit 112 switches the level state, and the control unit 112 controls the driving unit 113 to drive the lock tongue 13 to extend to the second preset position, and then the second switch unit 1112 switches the switch state so that the control unit 112 controls the driving unit 113 to stop working, so that the lock body is completely locked. At this time, the first switch unit 1111 and the second switch unit 1112 maintain this switch state when the lock body is completely locked.

[0057] Optionally, Figure 3 Detailed circuit diagram of the control unit 112. The control unit includes a control chip U2, which has a built-in program control method for unlocking and locking that is mature in the prior art.

[0058] In some optional embodiments, such as Figure 2 and Figure 4 As shown, the first switch unit 1111 includes: a first switch circuit 1113, a second switch circuit 1114 and an output circuit 1115, wherein the first switch circuit 1113, its control end (i.e., the moving contact of the internal touch switch) is mechanically connected to the inclined tongue 12, its first end is connected to the first end of the second switch circuit 1114, and its second end is connected to the first power supply 5V; the second switch circuit 1114, its control end (i.e., the moving contact of the internal touch switch) is mechanically connected to the inclined tongue 12, and its second end is connected to the input end of the output circuit 1115; the output circuit 1115, its second end is connected to the first power supply 5V, and its second end outputs a TRIG signal and is connected to the first input end of the control unit 112. Specifically, Figure 2 and Figure 4 When the inclined tongue 12 is contracted by an external force so that the first switch circuit 1113 and the second switch circuit 1114 switch the switch state, the first power supply 5V charges the first switch circuit 1113; when the inclined tongue 12 resumes extending so that the first switch circuit 1113 switches the switch state, the electric energy in the first switch circuit 1113 is discharged to the output circuit 1115 through the first switch circuit 1113 and the second switch circuit 1114, and then the level state of TRIG changes. The control unit 112 controls the driving unit 113 to drive the locking tongue 13 to extend to the second preset position based on the current level state of TRIG.

[0059] Specifically, Figure 4As shown, the first switch circuit 1113 includes: a first resistor R5, a first capacitor C5, a single-pole double-throw switch S1 and two current-limiting resistors (R17 and R24), wherein the first resistor R5, a first end thereof is connected to the first end of the first capacitor C5 and the first end of the single-pole double-throw switch S1, and a second end thereof is connected to the second end of the first capacitor C5 and then grounded; the single-pole double-throw switch S1, a second end thereof is connected to the first end of the second switch circuit 1114, and a third end thereof is connected to the first ends of the two current-limiting resistors (R17 and R24), which is used to switch the switch state based on the extension and retraction state of the inclined tongue 12; the second ends of the two current-limiting resistors (R17 and R24) are connected to the first power supply 5V, which is used to limit the current between the first power supply 5V and the single-pole double-throw switch S1, wherein the switch S1 takes a single-pole double-throw switch as an example, but is not limited thereto.

[0060] Specifically, Figure 2 and Figure 4 In the embodiment, when the inclined tongue 12 is contracted by an external force, the inclined tongue drives the moving contact of the single-pole double-throw switch S1 to move, and the safety structure in the inclined tongue 12 drives the moving contact of the switch S2 in the second switch circuit 1114 to move, so that the first end of the single-pole double-throw switch S1 is connected to the third end, and the first end of the switch S2 in the second switch circuit 1114 is connected to the third end, and the first power supply 5V charges the first capacitor C5 through two current limiting resistors (R17 and R24); when the inclined tongue 12 resumes extension, the first end of the single-pole double-throw switch S1 is connected to the second end, and the safety structure in the inclined tongue 12 still maintains the contracted state so that the switch S2 maintains the first end and the third end connected unchanged, and the charge in the first capacitor C5 is discharged to the output circuit 1115 through the single-pole double-throw switch S1 and the switch S2.

[0061] In some optional embodiments, such as Figure 4 As shown, the output circuit 1115 includes: a filter circuit 1116 and a third switch circuit 1117, wherein the filter circuit 1116, a first end of which is connected to the control end of the third switch circuit 1117 and the second end of the second switch circuit 1114, and a second end of which is connected to the first end of the third switch circuit 1117 and then grounded, and is used to filter out the interference signal of the control end of the third switch circuit 1117; the third switch circuit 1117, a second end of which is connected to the first power supply 5V, an output end of which outputs a TRIG signal and is connected to the first input end of the control unit 112, and is used to invert the level signal of its control end and transmit it to the control unit 112.

[0062] Alternatively, if Figure 4 As shown, the filter circuit 1116 includes a capacitor C7 and a resistor R8 connected in parallel, and the third switch circuit includes a transistor Q1, a current limiting resistor R2 and a filter capacitor C6.

[0063] Specifically, Figure 2and Figure 4 In the embodiment, when the inclined tongue 12 is contracted by an external force, the inclined tongue 12 drives the moving contact of the single-pole double-throw switch S1 to move, and the safety structure in the inclined tongue 12 drives the moving contact of the switch S2 in the second switch circuit 1114 to move, so that the first end of the single-pole double-throw switch S1 is connected to the third end, and the first end of the switch S2 in the second switch circuit 1114 is connected to the third end, and the first power supply 5V charges the first capacitor C5 through the two current limiting resistors R17 and R24, the control end of Q1 is at a low level, Q1 is turned off, and the TRIG signal is a high level signal.

[0064] Specifically, Figure 2 and Figure 4 When the inclined tongue 12 resumes its extension, the first end of the single-pole double-throw switch S1 is connected to its second end, and the safety structure in the inclined tongue 12 remains in a contracted state so that the switch S2 maintains the first end connected to its third end unchanged, and the charge in the first capacitor C5 is discharged to the output circuit 1115 through the single-pole double-throw switch S1 and the switch S2, and the voltage at the control end of Q1 gradually increases. When it increases to the maximum conduction voltage drop of Q1, Q1 is turned on, and the TRIG signal jumps to a low-level signal. The control unit 112 controls the driving unit 113 based on the low-level signal to drive the lock tongue 13 to extend to the second preset position, and controls the lock tongue 13 to be locked.

[0065] In some optional embodiments, such as Figure 2 and Figure 5 As shown, the second switch unit 1112 includes: a fourth switch circuit 1118 and a fifth switch circuit 1119, wherein the fourth switch circuit 1118 has a control end connected to the first end of the lock tongue 13, a first end connected to the first end of the fifth switch circuit 1119, and a second end connected to the second input end of the control unit 112; the fifth switch circuit 1119 has a control end connected to the first end of the lock tongue 13, and a second end connected to the third input end of the control unit 112.

[0066] Optionally, Figure 2 and Figure 5 In the figure, switches S3 and S4 are both single-pole double-throw switches, and their moving contacts are in contact with the lock tongue 13. When the lock tongue 13 is extended or retracted, the moving contacts of S3 and S4 are driven to move, switching the connection state with the corresponding static contacts; the fourth switch circuit 1118 also includes a filter circuit composed of a capacitor C14, a capacitor C15 and an inductor L1, which filters out the clutter interference input to the second input terminal of the control unit; the fifth switch circuit 1119 also includes a filter circuit composed of a capacitor C3, a capacitor C4 and an inductor L2, which filters out the clutter interference input to the third input terminal of the control unit.

[0067] Specifically, combined Figures 2 to 5When the control unit 112 controls the driving unit 113 to drive the lock tongue 13 to retract to the first preset position based on the unlocking signal, the first end of S3 contacts its second end and the first end of S4 contacts its third end. The fourth switch circuit 1118 outputs LOCK_INP as a low-level signal and the fifth switch circuit 1119 outputs UNLOCK_INP as a high-level signal. The control unit 112 determines that the lock body has been unlocked based on the two level signals and drives the driving unit 113 to stop working. At this time, the first end of S1 contacts its second end and the first end of S2 contacts its second end.

[0068] Specifically, combined Figures 2 to 5 When the inclined tongue 12 is contracted by external force, it indicates that the inclined tongue 12 is squeezed by the edge of the inclined tongue groove and the lock body is ready to be locked. At this time, the first end of S1 contacts its third end, the first end of S2 contacts its third end, and the first power supply 5V charges C5.

[0069] Specifically, combined Figures 2 to 5 When the inclined tongue 12 resumes its extension, it indicates that the inclined tongue 12 has completely entered the bolt groove, but the safety structure on the inclined tongue is still in a retracted state, that is, after the first end of S1 contacts its second end and the first end of S2 contacts its third end, the charge in C5 is discharged to the control end of Q1 through S1 and S2, so that the voltage at the control end of Q1 continues to increase; when it increases to exceed the conduction voltage drop of Q1, Q1 is turned on, and the TRIG signal output by the output circuit 1115 jumps from a high level to a low level, so that the first input end of the control unit 112 switches the level state, thereby controlling the driving unit 113 to drive the bolt 13 to extend to the second preset position, so that the lock body is locked.

[0070] Specifically, combined Figures 2 to 5 When the lock body is locked, the first end of S3 immediately contacts its third end, and the first end of S4 immediately contacts its second end. Then, the fourth switch circuit 1118 outputs LOCK_INP as a high-level signal, and the fifth switch circuit 1119 outputs UNLOCK_INP as a low-level signal. The control unit 112 determines that the lock body is locked based on the two level signals and drives the driving unit 113 to stop working.

[0071] In some optional embodiments, reference Figure 2 and Figure 6 The driving unit 113 includes: a driving circuit 1131 and a motor 1132, wherein the driving circuit 1131, the first control terminal BI and the second control terminal FI are respectively connected to the first output terminal and the second output terminal of the control unit 112, and the output terminal is connected to the control terminal of the motor 1132; the motor 1132, the output terminal is connected to the control terminal of the lock tongue 13, and is used to drive the lock tongue 13 to extend or retract.

[0072] Optionally, Figure 6 The driving circuit 1131 includes a control chip U3, which has a built-in program control method for motor driving in the prior art. The resistors R14 and R15 are used to provide a path to the ground for leakage current and interference signals.

[0073] Specifically, refer to Figure 3 and Figure 6 The drive unit 113 has the following three control modes for the motor 1132:

[0074] (1) When the control unit 112 receives the unlock signal RX1, the BI pin and the FI pin of the control unit 112 respectively output a high level and a low level, and the driving unit 113 drives the motor 1132 to reverse based on the two level signals, so that the lock tongue 13 retracts.

[0075] (2) When the TRIG pin of the control unit 112 changes from a high level to a low level, the BI pin and the FI pin of the control unit 112 output a low level and a high level respectively, so that the driving unit 113 drives the motor 1132 to rotate forward, so that the lock tongue 13 extends.

[0076] (3) When the locking tongue is retracted to the first preset position or extended to the second preset position, the BI pin and the FI pin of the control unit 112 are both at a low level, so that the driving unit 113 stops working and the motor 1132 stops rotating.

[0077] Alternatively, if Figure 2 As shown, the lock body control circuit 11 also includes: a motor current detection unit 114, whose input end is connected to the detection end of the drive circuit 1131, and whose output end is connected to the fifth input end of the control unit 112, which is used to detect the current signal when the motor 1132 is running.

[0078] Optionally, the specific circuit diagram of the motor current detection unit 114 is as follows: Figure 7 As shown, it includes a control chip U8 and three filter capacitors (C18, C19 and C20). The control chip U8 has a built-in program control method for current detection that is mature in the prior art. The IP+ pin of U8 collects the current signal of the drive circuit 1131 when it is running, and converts the current signal into a MOTOR_CUR signal and sends it to the control unit 112, so that the control unit 112 can respond to and process the drive unit 113 based on the current signal. For example, when the control unit 112 determines that the current exceeds the limit, the drive circuit 1131 can be controlled to stop working.

[0079] For example, Figure 8This is a specific circuit structure diagram of a power conversion circuit, which is used to convert an external 8.4V power supply voltage into a 5V power supply voltage for the lock body control circuit 11. Those skilled in the art can set the parameters of the specific components in the circuit according to the voltage level to be converted, and the specific structure and parameters of the circuit are not limited here.

[0080] This embodiment provides a door lock 1, such as Fig. 9 As shown, it includes: an inclined tongue 12, a locking tongue 13, a door lock body 14 and a lock body control circuit 11 of the above embodiments and any optional implementation manner thereof, wherein the locking tongue 13, a control end of which is connected to the output end of the driving unit 113, and a first end of which is connected to the control end of the switch unit 111; the inclined tongue 12, a control end of which is connected to the control end of the switch unit 111; the locking tongue 13 and the inclined tongue 12 are connected to the door lock body 14; the control unit 112 controls the driving unit 113 to drive the locking tongue 13 to retract to the first preset position based on the unlocking signal, and then the door lock 1 is unlocked; the control unit 112 controls the driving unit 113 to drive the locking tongue 13 to extend to the second preset position, and then the door lock 1 is locked.

[0081] Specifically, Fig. 9 In the example, door lock 1 has the following three action states:

[0082] (1) When the door lock 1 needs to be unlocked, the control unit 112 controls the driving unit 113 to operate based on the unlocking signal, so that the lock tongue 13 shrinks to the first preset position, so that the door lock 1 is unlocked.

[0083] (2) When the door lock 1 needs to be locked, and the frame of the latch bolt groove squeezes the latch bolt 12 to cause the latch bolt 12 to shrink, the switch unit 111 switches the switch state, so that the energy storage unit in the switch unit 111 starts to charge.

[0084] (3) When the door lock 1 needs to be locked, and the latch bolt 12 enters the latch bolt groove and is fully extended or extended to the third preset position, the switch unit 111 switches the switch state, so that the energy storage unit in the switch unit 111 is discharged, and the first input end of the control unit 112 switches the level state, thereby controlling the driving unit 113 to drive the latch bolt 13 to extend to the second preset position, so that the door lock 1 is locked.

[0085] The door lock provided by the present embodiment has a switch unit in the lock body control circuit that can quickly switch the switch state according to the extension and retraction state of the lock tongue and the inclined tongue, so that the control unit can quickly control the drive unit based on the level signal output by the switch unit, thereby realizing efficient unlocking or locking of the door lock. The door lock control circuit of the present embodiment only adopts a hardware structure, and the door lock can quickly respond to changes in electrical signals, thereby improving the efficiency of unlocking and locking, and the door lock has a simple structure, which reduces the manufacturing cost and maintenance cost of the door lock.

[0086] This embodiment provides a door, such as Fig.10 As shown, it includes: a door body, a door opener 2 and a door lock 1 of the above embodiments and any optional implementation manner thereof, wherein the door lock is embedded in the side of the door body; the door opener has a control end connected to the third output end of the control unit, and a first end connected to the door body; when the door lock is unlocked, the control unit controls the door opener to open the door body.

[0087] Specifically, Fig.10 In the system, the door has the following three action states:

[0088] (1) When the door needs to be opened, the control unit 112 controls the driving unit 113 to operate based on the unlocking signal, so that the lock tongue 13 shrinks to the first preset position. After the door lock 1 is unlocked, the control unit 112 sends a door opening signal to the door opener 2, and the door opener 2 performs the door opening operation.

[0089] (2) When the door is closed and the latch bolt 12 is pressed against the door frame to cause the latch bolt 12 to shrink, the switch unit 111 switches the switch state, so that the energy storage unit in the switch unit 111 starts to charge.

[0090] (3) When the door is completely closed, that is, the latch bolt 12 enters the latch bolt groove and is fully extended or extended to the third preset position, the switch unit 111 switches the switch state, so that the energy storage unit in the switch unit 111 is discharged, and the first input end of the control unit 112 switches the level state, thereby controlling the driving unit 113 to drive the lock bolt 13 to extend to the second preset position, so that the door is locked.

[0091] In the door provided by this embodiment, the switch unit in the lock body control circuit can quickly switch the switch state according to the extension and retraction state of the lock tongue and the inclined tongue, so that the control unit can quickly control the drive unit based on the level signal output by the switch unit, thereby realizing efficient unlocking or locking of the door lock. After the door lock is unlocked, the control unit can automatically control the door opener to open the door, realizing automatic door opening control. The door lock control circuit of this embodiment only adopts a hardware structure, the door lock can quickly respond to changes in electrical signals, and the door lock has a simple structure, which reduces the manufacturing cost and maintenance cost of the door.

[0092] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A lock body control circuit, characterized in that: include: A switch unit, a control unit and a drive unit, wherein: A switch unit, whose control end is connected to the oblique tongue of the lock body, and whose control end is also connected to the first end of the lock tongue of the lock body, and whose first output end, second output end and third output end are respectively connected to the first input end, second input end and third input end of the control unit; A control unit, wherein the fourth input terminal thereof inputs an unlocking signal, and the first output terminal and the second output terminal thereof are connected to the first control terminal and the second control terminal of the driving unit respectively; A driving unit, whose output end is connected to the control end of the lock tongue, and is used to drive the lock tongue to extend or retract; The control unit controls the driving unit to drive the lock tongue to retract to a first preset position based on the unlocking signal; When the inclined tongue is contracted by an external force so that the switch unit switches the switch state, the switch unit is charged; when the inclined tongue resumes its extension so that the switch unit switches the switch state, the switch unit discharges so that the first input end of the control unit switches the level state, and the control unit controls the driving unit to drive the lock tongue to extend to a second preset position.

2. The lock body control circuit according to claim 1, characterized in that: The switch unit includes: a first switch unit and a second switch unit, wherein: A first switch unit, a control end of which is connected to the latch tongue, and an output end of which is connected to a first input end of the control unit; A second switch unit, whose control end is connected to the first end of the lock tongue, and whose first output end and second output end are respectively connected to the second input end and third input end of the control unit; When the control unit controls the driving unit to drive the lock tongue to retract to the first preset position based on the unlocking signal, the first switch unit and the second switch unit switch the switch state, so that the control unit controls the driving unit to stop working; When the inclined tongue is contracted by an external force so that the first switch unit switches the switch state, the first switch unit is charged; when the inclined tongue resumes its extension so that the first switch unit switches the switch state, the first switch unit discharges so that the first input end of the control unit switches the level state, and then the control unit controls the driving unit to drive the lock tongue to extend to a second preset position, and then the second switch unit switches the switch state so that the control unit controls the driving unit to stop working.

3. The lock body control circuit according to claim 2, characterized in that: The first switch unit includes: a first switch circuit, a second switch circuit and an output circuit, wherein: A first switch circuit, whose control end is connected to the oblique tongue, whose first end is connected to the first end of the second switch circuit, and whose second end is connected to the first power supply; A second switch circuit, a control end of which is connected to the oblique tongue, and a second end of which is connected to the input end of the output circuit; an output circuit, a second end of which is connected to the first power supply, and a second end of which is connected to the first input end of the control unit; When the control unit controls the driving unit to drive the lock tongue to retract to the first preset position based on the unlocking signal, the first switch circuit and the second switch circuit switch the switch state, so that the control unit drives the driving unit to stop working; When the inclined tongue is contracted by an external force so that the first switch circuit and the second switch circuit switch the switch state, the first switch circuit is charged; when the inclined tongue is extended again so that the first switch circuit switches the switch state, the first switch circuit is discharged to the output circuit.

4. The lock body control circuit according to claim 3, characterized in that: The first switch circuit includes: a first resistor, a first capacitor, a single-pole double-throw switch and a current limiting circuit, wherein: A first resistor, a first end of which is connected to the first end of the first capacitor and the first end of the single-pole double-throw switch, and a second end of which is connected to the second end of the first capacitor and then grounded; A single-pole double-throw switch, a second end of which is connected to the first end of the second switch circuit, and a third end of which is connected to the first end of the current limiting circuit, and is used to switch the switch state based on the extension and retraction state of the inclined tongue; a current limiting circuit, a second end of which is connected to the first power supply, and is used to limit the current between the first power supply and the single-pole double-throw switch; When the latch tongue is contracted by an external force, the first end of the single-pole double-throw switch is connected to the third end thereof, and the second switch circuit switches the switch state, so that the first power supply charges the first capacitor; When the inclined tongue resumes its extension, the first end of the single-pole double-throw switch is connected to its second end, so that the first capacitor is discharged to the output circuit through the single-pole double-throw switch and the second switch circuit.

5. The lock body control circuit according to claim 3, characterized in that: The output circuit includes: a filter circuit and a third switch circuit, wherein: a filter circuit, a first end of which is connected to the control end of the third switch circuit and the second end of the second switch circuit, a second end of which is connected to the first end of the third switch circuit and then grounded, and is used to filter out interference signals from the control end of the third switch circuit; The third switch circuit has a second end connected to the first power supply and an output end connected to the first input end of the control unit, and is used for inverting the level signal of its control end and transmitting it to the control unit.

6. The lock body control circuit according to claim 2, characterized in that: The second switch unit includes: a fourth switch circuit and a fifth switch circuit, wherein: a fourth switch circuit, whose control end is connected to the first end of the lock tongue, whose first end is connected to the first end of the fifth switch circuit, and whose second end is connected to the second input end of the control unit; a fifth switch circuit, a control end of which is connected to the first end of the lock tongue, and a second end of which is connected to the third input end of the control unit; When the control unit controls the driving unit to drive the lock tongue to retract to the first preset position based on the unlocking signal, the first switch unit, the fourth switch circuit and the fifth switch circuit switch the switch state, so that the control unit drives the driving unit to stop working; After the control unit drives the driving unit to drive the lock tongue to extend to the second preset position, the fourth switch circuit and the fifth switch circuit switch the switch state, so that the control unit drives the driving unit to stop working.

7. The lock body control circuit according to claim 1, characterized in that: The driving unit includes: a driving circuit and a motor, wherein: A driving circuit, wherein the first control terminal and the second control terminal are respectively connected to the first output terminal and the second output terminal of the control unit, and the output terminal is connected to the control terminal of the motor; A motor, whose output end is connected to the control end of the lock tongue, and is used to drive the lock tongue to extend or retract; When the control unit receives an unlocking signal, the control unit drives the driving circuit to drive the motor to reverse; When the internal capacitor of the switch unit is discharged, the control unit drives the drive circuit to drive the motor to rotate forward; When the locking tongue is retracted to the first preset position or extended to the second preset position, the control unit drives the driving circuit to stop working.

8. The lock body control circuit according to claim 7, characterized in that: Also includes: A motor current detection unit, whose input end is connected to the detection end of the drive circuit and whose output end is connected to the fifth input end of the control unit, is used to detect the current signal when the motor is running.

9. A door lock, characterized in that: include: A lock tongue, a latch tongue, a door lock body, and a lock body control circuit as claimed in any one of claims 1 to 8, wherein: A lock tongue, a control end of which is connected to the output end of the driving unit, and a first end of which is connected to the control end of the switch unit; A latch bolt, a control end of which is connected to a control end of the switch unit; The lock tongue and the oblique tongue are connected to the door lock body; After the control unit controls the driving unit to drive the lock tongue to retract to the first preset position based on the unlocking signal, the door lock is unlocked; After the control unit controls the driving unit to drive the lock tongue to extend to the second preset position, the door lock is locked.

10. A door, characterized in that: include: A door body, a door opener and a door lock as claimed in claim 9, wherein: A door lock, which is embedded in the side of the door body; A door opener, whose control end is connected to the third output end of the control unit and whose first end is connected to the door body; When the door lock is unlocked, the control unit controls the door opener to open the door body.

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