CN209568808U - a shopping cart lock - Google Patents

Abstract

The utility model discloses a shopping cart lock, which comprises a key, on which a clamping part is arranged; a lock body, on which a keyhole for the key to be inserted is arranged; a connecting wire, one end of which is connected to the lock body, The other end is connected to the key, and the length of the connecting wire ensures that the key cannot be inserted into the key hole of the lock body connected to itself; the lock bolt is arranged in the lock body and is configured to be able to move into the clamping part to block the movement of the key , or can move out of the clamping part to release the movement of the key; the deadbolt driving member is arranged in the lock body, which includes an electric driver and an adapter member, the input end of the adapter member is connected with the moving part of the driver, and the output of the adapter member The end is connected to the lock tongue, and the transfer member is configured to convert the output force of the driver into the driving force that makes the lock tongue move into or out of the clamping part. The shopping cart lock does not need to mortgage coins, and because the electronic control mechanism is used, it can reduce the number of electronic locks. The mechanical mechanism of the lock is suitable for long-term operation and easy maintenance.

Description

a shopping cart lock

technical field

The invention belongs to the technical field of the Internet of Things, and specifically relates to an electronic lock, especially an electronic lock installed on a shopping cart.

Background technique

At present, the shopping cart lock adopts a coin-operated lock. As the patent application number is 200420059445.9, the invention patent discloses a coin lock for car purchase, and the patent application number is 03810668.X. The invention patent literature discloses a mortgage lock and The patent application number is 201620005872.1, which discloses an integrated shopping cart coin-operated lock. From the above-mentioned documents, the structures of the above-mentioned documents are all mechanical structures to complete the unlocking and locking. The coin-operated lock has the following defects: 1. The structure is complex and difficult to assemble. There are many processes and high cost; 2. When using, you need to mortgage coins, which is not suitable for the current payment method, which brings inconvenience to consumers; 3. Due to the use of complex mechanical structures, long-term operation will inevitably wear out, resulting in coin insertion or withdrawal Difficulty; 4. When the coin does not go in, the car behind can no longer be used. When it is difficult to return and close, it is easy to cause consumers to smash the lock violently. Both of these situations bring management troubles to the managers.

Contents of the invention

The purpose of the invention is to provide a shopping cart lock to solve the technical defects in the existing shopping cart lock mentioned in the background art.

In order to achieve the above object, the technical means adopted by the invention is: a shopping cart lock, comprising:

The key is provided with a clamping part on the key;

The lock body is provided with a keyhole for a key to be inserted into the lock body;

A connecting wire, one end of which is connected to the lock body and the other end is connected to the key, the length of the connecting wire ensures that the key cannot be inserted into the key hole of the lock body connected to itself;

The lock bolt is arranged in the lock body and is configured to be able to move into the locking part to block the movement of the key, or to move out of the locking part to release the movement of the key;

The deadbolt driving member is arranged in the lock body and includes an electric driver and an adapter member. The input end of the adapter member is connected to the moving part of the driver, and the output end of the adapter member is connected to the lock tongue. The adapter member is arranged on The output force of the driver is converted into the driving force for moving the lock tongue into or out of the locking part.

Further, the electric driver is a rotating motor, and one end of the deadbolt is arranged in a limiting hole on the lock body, and the limiting hole is used to limit the rotation of the deadbolt so as to make the deadbolt move linearly, and the transfer member is configured The purpose is to convert the rotational torque output by the rotary motor into a driving force for moving the lock tongue into or out of the engaging portion.

Further, the transfer member includes a motor pulley, a belt and a deadbolt pulley, the outer thread of the deadbolt is provided with an external thread, the outer surface of the motor pulley is provided with a circular belt groove, and the inner surface of the motor pulley is along the There is a connecting hole in the direction of the central axis of the belt groove, and the motor pulley is fixed on the rotating shaft of the motor through the connecting hole. There is a circular belt groove on the outer surface of the lock tongue pulley, and the inside of the lock tongue pulley is along the belt groove. There is a threaded hole in the direction of the central axis, and the lock tongue is located in the threaded hole of the lock tongue pulley to be threaded. The lock tongue pulley can only rotate in the lock body under the action of the limit member, and the belt connects the motor pulley to the lock. Tongue pulley drive connection.

Further, the transfer member is a motor gear, an intermediate gear and a deadbolt gear, the outer surface of the motor gear has a ring of gears, the inside of the motor gear has a connecting hole installed on the rotating shaft of the motor, and the outer surface of the deadbolt gear has There is a circle of gears, and there is a threaded hole in the lock tongue gear along the direction of its central axis. The lock tongue is located in the threaded hole of the lock tongue gear and is threadedly connected. The lock tongue gear can only rotate under the action of the limit member in the lock body. , the intermediate gear is connected with the motor gear and the dead bolt gear.

Further, the limiting member includes a stepped through hole arranged on the fixed mounting plate and a limiting post arranged on the inner side of the housing, the lower part of the bolt pulley is located in the stepped through hole to limit the direction of the bolt pulley. Moving downward, the deadbolt passes through the stepped through hole, and the limiting column abuts against the upper end of the deadbolt pulley to limit the upward movement of the deadbolt pulley.

Further, the electric driver is an electromagnetic coil assembly, and the transition member is configured to convert the output force of the electromagnetic coil assembly into a driving force for moving the lock tongue out of or into the clamping portion, and the electromagnetic coil assembly includes a housing, The electromagnetic coil and the electromagnet, the housing is fixed in the lock body, the electromagnet is fixedly arranged in the housing, the electromagnetic coil is wound on the electromagnet, one end of the transfer member is connected with the electromagnet through a spring, and the transfer member The other end is connected with the deadbolt.

Further, the lock body has an installation component installed on the shopping cart.

Further, the key and the key hole are provided with a guiding structure for directional insertion of the key into the key hole.

Further, it includes a trigger circuit board and a control board, the trigger circuit board is communicably connected with the control board, the electric driver of the deadbolt driving member is connected with the control board, the trigger circuit board is fixed in the lock body and is configured when the key is inserted into the keyhole When it reaches the locked position, it is triggered and sends a trigger signal to the control board, which is configured to connect to the wireless network, receive instructions and control the deadbolt driving member.

Further, a barcode scanning module is included, and the barcode scanning module is installed in the lock body. There is a scanning window on the side of the lock body for the barcode scanning module to scan the barcode of the commodity outside the lock body. The control board is connected to the barcode scanning module in communication.

Compared with the prior art, the beneficial effects of the invention are: the invention can realize the remote control of the unlocking of the shopping cart lock, trigger the circuit board to control the locking of the shopping cart lock, and does not need to mortgage coins, which is suitable for the living habits of modern people and provides convenience for consumption. It brings convenience to operators and managers. Due to the use of electronic control mechanism, the mechanical mechanism of electronic lock can be reduced, which is suitable for long-term operation and easy maintenance.

Description of drawings

Fig. 1 is the overall structure schematic diagram of this shopping cart lock;

Fig. 2 is the first explosion diagram of this shopping cart lock;

Fig. 3 is the second explosion diagram of this shopping cart lock;

Fig. 4 is a schematic diagram of the installation of the deadbolt driving member in the shopping cart lock;

Fig. 5 is a schematic structural view of the fixed mounting plate in the shopping cart lock;

Fig. 6 is a schematic structural view of the upper housing in the shopping cart lock;

Fig. 7 is a schematic structural view of the bolt driving member in the shopping cart lock, wherein Fig. 7a is a schematic diagram of a motor pulley, Fig. 7b is a schematic diagram of a belt, Fig. 7c is a schematic diagram of a bolt pulley, and Fig. 7d is a schematic diagram of a dead bolt;

Fig. 8 is a schematic diagram of modules of the first lock control circuit in the shopping cart lock;

Fig. 9 is a schematic diagram of the circuit structure of the CPU module in the shopping cart lock and the first locking trigger module connected thereto;

Fig. 10 is a schematic diagram of the circuit structure of the second locking trigger module in the shopping cart lock;

Fig. 11 is a schematic diagram of the circuit structure of the lock control module for driving the electromagnetic coil assembly in the shopping cart lock;

Fig. 12 is a flow chart of the control method of the first lock control circuit;

Fig. 13 is a schematic diagram of modules of the second lock control circuit in the shopping cart lock;

Fig. 14 is a flow chart of the control method of the second lock control circuit.

It should be noted that the accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principle of the invention.

Detailed ways

In order to make the content of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be noted that the "connection" in this embodiment is understood in a broad sense, including indirect connection, direct connection or rotational connection.

The shopping cart lock provided by the present invention is suitable for shopping carts, and it is installed on shopping carts. A row of shopping carts is arranged in a row, and the key of the shopping cart lock of the front shopping cart is inserted into the keyhole of the shopping cart lock of the back shopping cart. , the key cannot be inserted into the key hole of the shopping cart lock connected to itself, so the shopping cart lock connects a row of shopping carts and manages the shopping carts well. The shopping cart lock system consists of a mobile communication device, a cloud server and a shopping cart lock. The mobile communication device establishes communication with the cloud server through a wireless network; the cloud server establishes communication with the shopping cart lock through a wireless network; the cloud server and/or mobile communication device receive The lock status information and the like sent by the shopping cart lock manage the shopping cart lock; in addition, the mobile communication device controls the shopping cart lock via the cloud server, or the cloud server directly controls the shopping cart lock.

The shopping cart lock provided by the present invention is as follows: with reference to Fig. 1-Fig. 7, a kind of shopping cart lock comprises, key 1, and key 1 is provided with clamping portion 1-1, and preferably, key 1 is rectangular On the metal plate, the clamping part 1-1 on the key 1 is a clamping hole or a clamping groove, and the shape of the clamping hole or the clamping groove can allow the deadbolt 4 to move in or out. For example, the clamping hole or the clamping groove is circular, and correspondingly, the moving in and out end of the lock tongue is also circular.

The lock body 2 is provided with a key hole 2-1 for inserting the key 1; preferably, the key hole 2-1 is rectangular, for the insertion of the rectangular key 1.

In order to insert the key 1 into the keyhole 2-1 accurately, the guide structure provided on the key 1 and the keyhole 2-1 is as follows: a guide block is arranged on the inner wall of the keyhole 2-1 along the moving direction of the key 1 , and a guide groove is correspondingly provided on the key 1, and when the key 1 is inserted into the key hole 2-1, the guide block moves along the guide groove 322. In the same way, the structure of the guide structure can be that the guide groove is arranged in the key hole 2-1, and the guide block is arranged on the key 1 at the same time. The guiding structure arranged in the key 1 and the keyhole 2-1 can also be other similar structures, as long as it can insert the key 1 into the keyhole 2-1 in a directional manner.

Connecting line 3, one end thereof is connected with lock body 2, and the other end is connected with key 1, and the length of described connecting line 3 guarantees that key 1 cannot be inserted in the keyhole 2-1 of lock body 2 connected with itself; Connecting line 3 The best soft metal connecting line, such as chains and so on.

The lock tongue 4 is arranged in the lock body 2 and is configured to be able to move into the engaging portion 1-1 to block the movement of the key 1, or to move out of the engaging portion 1-1 to release the The movement of key 1.

The deadbolt driving member is arranged in the lock body 2, and it includes an electric driver 5-1 and an adapter member, the input end of the adapter member is connected to the moving part of the driver 5-1, and the output end of the adapter member is connected to the deadbolt 4 , the adapter member is configured to convert the output force of the electric driver into a driving force for moving the lock tongue 4 into or out of the engaging portion 1 - 1 .

In this embodiment, the lock body 2 includes an upper lock body 21 and a lower lock body 22, the upper lock body 21 and the lower lock body 22 are detachably connected, preferably, the upper lock body 21 and the lower lock body 22 are connected by screws , or clamping, the key hole 2-1 is arranged on the lower lock body 22, the key hole 2-1 is set from the outside of the lock body 2 toward the inside of the lock body 2, and the inner top surface of the key hole 2-1 hole wall is provided with a A bit hole 2-3 stretches in for the dead bolt 4, and the step hole 2-3 can also play a guiding role for the dead bolt 4.

The upper end of the dead bolt 4 extends into the limit hole 21-1 located on the inner top surface of the upper lock body 21. The function of the limit hole 21-1 is to limit the rotation of the dead bolt 4 to ensure that the dead bolt 4 can only go up and down. Move, and the lower end of dead bolt 4 stretches in the relief hole 2-3. Preferably, the cross-sectional shape of the upper end of the locking tongue 4 is a square or an equilateral triangle, and correspondingly, the limiting hole 21-1 is a square or an equilateral triangle.

The electric driver 5-1 in the deadbolt driving member adopts a rotary motor, preferably, the electric driver 5-1 adopts a rotary stepping motor, which facilitates and accurately controls the number of revolutions of the motor, thereby precisely driving the moving distance of the deadbolt 4 .

In order to drive the lock tongue 4 to move up and down, the transition member is configured to convert the rotational torque output by the motor into a driving force for moving the lock tongue 4 into or out of the engaging portion 1 - 1 .

In this embodiment, the transfer member includes a motor pulley 5-2, a belt 5-3 and a deadbolt pulley 5-4, the outer thread of the middle part of the deadbolt 4 is provided, and the motor pulley 5- 2 There is a circular belt groove on the outside, and a connecting hole is opened in the motor pulley 5-2 along the central axis of the belt groove, and the motor pulley 5-2 is fixed on the rotating shaft of the motor 5-1 through the connecting hole , the outer surface of the dead bolt pulley 5-4 has a circular belt groove, and the dead bolt pulley 5-4 has a threaded hole along the central axis of the belt groove, and the dead bolt 4 is located at the dead bolt pulley 5 -4 is threaded in the threaded hole, and the dead bolt pulley 5-4 can only rotate in the lock body 2 under the action of the limit member, and cannot move up and down. Therefore, when the dead bolt pulley 5-4 rotates, it can pass The rotation of the deadbolt pulley 5-4 drives the deadbolt 4 to move up or down; the belt 5-3 connects the motor pulley 5-2 with the deadbolt pulley 5-4, and when the motor rotates, the motor pulley 5 -2 rotates and drives the deadbolt pulley 5-4 to rotate through the belt 5-3, so that the deadbolt 4 moves up or down.

Preferably, in order to better install the deadbolt driving member, the upper lock body 21 is provided with a fixed mounting plate 6, and the fixed mounting plate 6 is fixed in the upper lock body 21 by screws, and the transfer member and the motor are fixed on the fixed On the mounting plate 6, the motor is fixed in the screw hole on the fixed mounting plate 6 by screws. In order to ensure that the deadbolt pulley 5-4 only rotates and does not move up and down, the fixed mounting plate 6 is provided with a stepped through hole 6- 1. On the one hand, the bolt 4 can be penetrated; on the other hand, the lower part of the bolt pulley 5-4 is located in the stepped through hole 6-1, and the diameter of the stepped through hole 6-1 is larger than that of the bolt pulley 5-4. Maximum outer diameter, so as not to hinder the rotation of the deadbolt pulley 5-4, the stepped through hole 6-1 limits the downward movement of the deadbolt pulley 5-4, and cooperates with it, on the inner top surface of the upper lock body 21 A limit post 21-2 is provided, and the limit post 21-2 is located above the dead bolt pulley 5-4 and interferes with the upper end of the dead bolt pulley 5-4 to limit the upward movement of the dead bolt pulley 5-4, but It does not hinder the rotation of the deadbolt pulley 5-4; it is worth noting that the structure limiting the up and down movement of the deadbolt pulley 5-4 is not limited to the above embodiment, and can also be provided on the fixed mounting plate 6 with the stepped through hole 6 -1 Cooperate with the limit cover plate so that the deadbolt pulley 5-4 is limited to rotate on the fixed mounting plate 6. A limit cover plate used in conjunction with the limit post can also be provided on the upper lock body 21 so that the lock bolt pulley 5 - 4 is limited to rotate in the upper lock body 32 .

It should be emphasized that the transfer member can also be a motor gear, an intermediate gear and a lock tongue gear. The outer surface of the motor gear has a ring of gears, and the inside of the motor gear has a connecting hole installed on the rotating shaft of the motor. There is a circle of gears, and there is a threaded hole in the bolt gear along the direction of its central axis, and the bolt 4 is located in the threaded hole of the bolt gear to be threaded, and the bolt gear is in the lock body 2 under the action of the limiting member It can only rotate and cannot move up and down. Therefore, when the bolt gear rotates, the bolt 4 can be driven to move upward or downward through the rotation of the bolt gear; the intermediate gear connects the motor gear and the bolt gear. When the motor rotates, The motor gear rotates and drives the dead bolt gear to rotate through the intermediate gear, so that the dead bolt 4 moves up or down. Of course, the transition member can also be a worm gear transition structure, as long as the shape and shape of the transition member can convert the rotational torque output by the motor into the driving force that makes the lock tongue 4 move into or out of the clamping portion 1-1. Both structures are within the scope of protection created by the present invention.

Although this embodiment cites the technical solution in which the electric driver 5-1 is a rotating motor, the electric driver 5-1 can also use an electromagnetic coil assembly, and the adapter member is configured to convert the output force of the electromagnetic coil assembly to make the bolt 4 The driving force for moving out or moving in the clamping part 1-1.

Specifically, the electromagnetic coil assembly includes a housing, an electromagnetic coil and an electromagnet, the housing is fixed on the inner top surface of the lock body 21, the electromagnet is fixedly arranged in the housing and is in the vertical direction up and down, the electromagnetic The coil is wound on the electromagnet, one end of the transfer member is connected to the electromagnet through a spring, the other end of the transfer member is connected to the upper end of the dead bolt 4, and the lower end of the dead bolt 4 can extend into the relief hole 2-3, The transfer member is a connecting column, one end of which is located in the housing. At this time, there is no need to fix the mounting plate 6. When the electromagnetic coil is energized, the electromagnet generates a large magnetic field, which generates an attractive force on the transfer member. Greater than the force of the spring, the transfer member moves upward and carries the lock tongue 4 upward, and moves out of the clamping part 1-1. When the electromagnetic coil is powered off, the transfer member moves downward under the action of the spring, and drives the lock tongue 4 to move into the clamp. The connecting part 1-1 and the connecting member 4 are made of magnetic metal materials, such as steel.

In the lock body 2, it includes a control board 7 and a trigger circuit board 8, the trigger circuit board 8 is communicably connected with the control board 7, the trigger circuit board 8 is fixed in the lock body 2 and is configured when the key 1 is inserted into the keyhole 2 -1 is triggered when it reaches the locked position and sends a trigger signal to the control board 7. The trigger signal can be used as a lock signal or as a lock status signal. The control board 7 is configured to connect to the wireless network, receive instructions and control The deadbolt driving member, preferably, the control board 7 is fixed on the fixed mounting plate 6, and is fixed by screw connection.

The control board 7 is fixed in the lock body 2, and it can connect to the cloud server through a wireless network, and receive instructions from the cloud server, such as unlocking instructions. After receiving the unlocking instruction, the control board 7 controls the action of the deadbolt driving member. Under the action of the deadbolt driving member, the deadbolt 4 moves upwards out of the locking part of the key, thereby releasing the movement of the key 1 and completing the unlocking.

In the lower lock body 22, there is a mounting groove 2-4 for triggering the circuit board 8. This mounting groove 2-4 communicates with the key hole 2-1. The triggering circuit board 8 is installed in the mounting groove 2-4. When the key 1 is inserted into the key When the hole 2-1 reaches the locked position, the trigger circuit board 8 is triggered by the key 1, thereby sending a trigger signal to the control board 7, and after the control board 7 receives the trigger signal, it controls the action of the bolt driving member. Next, the lock tongue moves downward into the locking part 1-1 of the key 1, thereby preventing the key from being pulled out from the lock body 2, and the locking is completed.

If the deadbolt driving member adopts a rotary motor, the control board 7 controls the forward and reverse rotation of the motor to realize the upward or downward movement of the driving deadbolt 4 .

If the bolt driving member adopts an electromagnetic coil assembly, the control board 7 controls the power on and off of the electromagnetic coil to realize the upward or downward movement of the driving bolt 4 .

In addition, on the basis of the foregoing embodiments, a barcode scanning module 9 is also included, and the barcode scanning module 9 is installed in the lock body 2. In cooperation with this, a barcode scanning module 9 is provided on the side of the lock body 2 to scan the outside of the lock body. The scanning window 2-2 of the commodity barcode, in the present embodiment, preferably, the barcode scanning module 9 is fixed on the fixed mounting plate 6, and is connected and fixed by screws, and a scanning window 2 is opened on the side of the lock body 21 -2. The control board 7 communicates with the barcode scanning module 9, controls the barcode scanning module 9 to scan the barcode, and receives the barcode information fed back by the barcode scanning module 9, that is, the commodity code, and feeds the barcode information back to the cloud server through the wireless network.

The lock body 2 is installed on the cross bar 10 of the shopping cart, and its installation components are: the opposite side surfaces of the upper lock body 21 are respectively provided with arc-shaped first installation relief holes, and the opposite side surfaces of the lower lock body 22 are There are respectively arc-shaped second installation relief holes, and the bottom surface of the lower lock body 22 is provided with positioning pins. When the upper lock body 21 and the lower lock body 22 are connected to each other, the cross bar 10 of the shopping cart is in the first installation position. In the encirclement of the relief hole and the second installation relief hole, the positioning pin penetrates into the positioning hole arranged on the cross bar 10 of the shopping cart, thereby preventing the lock body 2 from rotating.

The edges of the first installation relief hole and the second installation relief hole are respectively provided with elastic pads (not shown in the figure). When the crossbar 10 of the shopping cart is enclosed, the elastic pad wraps the crossbar 10 to prevent hard contact knocking Injury lock body 2, elastic protection pad adopts rubber to make.

It is worth noting that there are many kinds of installation components on the lock body 2 installed on the shopping cart, for example, by arranging at least two hoop components on the outer side of the lock body 2, etc., as long as the detachable installation can be realized, shopping The car lock is detachably installed on the shopping cart to facilitate maintenance and replacement and reduce management costs.

About the lock control circuit part of the shopping cart lock

Next, let's introduce the lock control circuit and control method integrated on the control board 7 and the trigger circuit board 8 in detail.

Embodiment 1, Fig. 8 is a module schematic diagram of the first lock control circuit in the shopping cart lock, the lock control circuit includes a CPU module, and a communication module, a lock control module, and a lock control module respectively communicably connected to the CPU module. A trigger module and a power module that supplies power to each module. Preferably, it also includes a voice module and a barcode scanning module communicatively connected to the CPU module.

The CPU module is the central processing unit of the lock control circuit, which generally controls the actions of each module of the lock control circuit, such as processing instructions from the cloud server, information from other modules of the lock control circuit, etc., and sending to other Each module sends control commands, etc.

The communication module includes an antenna, a buffer, etc., which can be connected to a wireless network, and send and receive information with external devices such as cloud server 2 under the control of the CPU module, such as 4G communication module, 3G communication module, wifi communication module, Bluetooth module and NB- lot communication module and so on.

The lock control module is used to control the bolt driving member according to the instruction of the CPU module, so as to realize the unlocking and locking of the key of the shopping cart lock.

The lock trigger module is used to be triggered by the key when the key is inserted into the keyhole to the lock position, and generates a trigger signal to the CPU module. The CPU module sends a lock instruction to the lock control module according to the trigger signal, and the high and low levels output by the lock trigger module It can reflect the lock status information (lock status, unlock status) and report the lock status information (lock status, unlock status) to the CPU module.

The power module includes a battery and a power management chip, which can provide different voltages for the above-mentioned various electronic modules, and can also feed back the status of the battery to the CPU module. It should be noted that, in the embodiments described later, the power supply module contains a battery as an electric energy storage device, but in the case of real-time power supply from the outside, for example, when electricity can be collected by solar energy, it may not have a battery, but It is realized by a combination of photovoltaic elements and capacitors, for example.

Preferably, the voice module includes a voice chip and a loudspeaker, and under the control of the CPU module, the voice module plays voice content, and the voice content is such as: unlocking is successful, locking is successful, or welcome to use or the like.

The CPU module, the communication module, the lock control module, the lock trigger module and the power supply module for supplying power to each module are integrated on the control board 7, and the lock trigger module is integrated on the CPU module. Trigger on board 8.

Fig. 9 is a schematic diagram of the circuit structure of the CPU module in the shopping cart lock and the first lock trigger module connected to it, the CPU module includes a single-chip microcomputer, a crystal oscillator circuit unit and a serial interface, and the crystal oscillator circuit unit and the serial interface The interface is connected with the corresponding port of the microcontroller. The CPU module adopts a single-chip microcomputer of the model STM32F103C8T6. The crystal oscillator circuit unit is connected to the fifth and sixth pins of the single-chip microcomputer, and the serial interface is connected to the 31st and 30th pins of the single-chip microcomputer. The power supply module outputs 3.3VDC The power supplies power to the CPU module.

In the present invention, the two preferred solutions of the lockout trigger module are: the first way is: the lockout trigger module includes a first resistor R6 and a light touch switch, and one end of the first resistor R6 is connected to the power supply module. The output end is connected, the other end of the first resistor R6 is connected with one end of the tact switch and one IO end of the CPU module, and the other end of the tact switch is grounded. When the key touches the tact switch, the output voltage of the locking trigger module is pulled down from high level, and the locking trigger module inputs low level to the twenty-fifth pin of the single chip microcomputer, and the single chip microcomputer uses the low level signal as the trigger signal, adopts The latching trigger module of the tact switch has a simpler structure, lower cost, and is easy to realize. The second method is: FIG. 10 is a schematic diagram of the circuit structure of the second locking trigger module in the shopping cart lock. The locking trigger module includes a proximity switch P1 and a photocoupler U2. The power supply terminal of the proximity switch P1 is connected to the power supply. The output terminal of the module is connected, the ground terminal of the proximity switch P1 is grounded, the output terminal of the proximity switch P1 is connected to the first input terminal of the photocoupler U2, and the second input terminal of the photocoupler U2 passes through the resistor It is connected with the output end of the power module, and the first output end of the photocoupler U2 is connected with the output end of the power module after a resistor, and the first output end of the photocoupler is connected with an IO end of the CPU module, so The second output end of the optocoupler is grounded. When the key is inserted, the output of the proximity switch P1 is pulled down from the default high level to low level. Pull down to low level, pull down the level of the fiber pin of the microcontroller from high level to low level, the microcontroller uses a low level signal as the trigger signal, this structure is non-contact trigger, easy to implement, and has good reliability .

In the present invention, for the motor, the lock control module adopts a transistor array of the type ULN2003L for driving a two-phase four-wire stepping motor, and the input terminals of the transistor array are connected to the four IO terminals (IN1- IN4), and the four output terminals of the transistor array are connected to the stepping motor. The stepper motor can realize precise rotation control, can precisely control the stroke of the lock bolt, and complete the stable unlocking and locking action.

In the present invention, for the electromagnetic coil assembly, Fig. 11 is a schematic diagram of the circuit structure of the lock control module for driving the electromagnetic coil assembly in the shopping cart lock; the lock control module includes a voltage dividing resistor unit, a switch tube and a freewheeling Diode D2, the IO terminal of the CPU module is connected to the base of the switch tube through a voltage dividing resistor unit, the collector of the triode Q9 is connected to the positive pole of the freewheeling diode D2 and an input terminal of the electromagnetic coil, and the freewheeling The cathode of the diode D2 and the other input end of the electromagnetic coil are simultaneously connected to the output end of the power module, and the emitter of the switch tube is grounded. The IO terminal of the CPU module outputs a high-level voltage, which is divided by the voltage dividing resistor unit (R38 and R39) and then input to the base of the transistor Q9. When the transistor Q9 is turned on, the electromagnetic coil is energized. When the voltage of the IO terminal of the CPU module changes When the level is low, the triode is turned off, and the electromagnetic coil is powered off. Since the electromagnetic coil has electric energy, it will continue to flow through the freewheeling diode D2 and gradually lose power. If it is large, it may have an impact on the triode and power module, and damage the components.

Fig. 12 is a flow chart of the control method of the first lock control circuit; the control method based on the lock control circuit in the above-mentioned embodiment 1 is as follows:

Step 1) Initialization, the CPU module is awakened after receiving the wake-up command sent by the cloud server, wakes up the lock control module and the communication module, and asks the lock trigger module for the current lock status information;

Step 2) The lock trigger module reports the current lock status information to the CPU module. If the current lock status information indicates that the lock is in an unlocked state, for example, the lock trigger module feeds back a high-level signal to the CPU module, and the CPU module determines that the shopping The car lock is in use, so start the first sleep mode, that is, the lock control module and the communication module enter the sleep state, and the CPU module also enters the sleep state but does not ignore or shield the level signal fed back by the lock trigger module, and perform step 5) ;

Step 3) If the lock status information is the information indicating that the lock is in the locked state, for example, the lock trigger module feeds back a low-level signal to the CPU module, then the CPU module determines that the shopping cart lock is locked, and then the CPU module receives the cloud server to send According to the unlock command, the CPU module sends a control command to the lock control module according to the unlock command, the lock control module controls the bolt driving component, and the bolt driving component drives the lock tongue to move out of the locking part of the key;

Step 4) If the current lock state information fed back by the lock trigger module to the CPU module is information indicating that the lock is in an unlocked state, the CPU module determines that the shopping cart lock is in use (preferably, the CPU module wakes up the voice module and controls it to play voice content ), then start the first dormant mode, that is, the lock control module and the communication module enter the dormant state, and the CPU module also enters the dormant state but does not ignore or shield the level signal fed back by the locking trigger module and the instruction from the cloud server (preferably, The voice module also goes to sleep), go to step 5);

If the current lock status information fed back by the blocking trigger module to the CPU module is information indicating that the lock is in the locked state, for example, what the blocking trigger module feeds back to the CPU module is a high level signal, then the shopping cart lock feeds back the unlocking failure information to the cloud server ( Preferably, the CPU module wakes up the voice module and controls it to play voice content), and then performs step 1);

Step 5) When the shopping cart lock is in the unlocked state, the CPU module wakes up regularly according to the first period set by itself, wakes up the communication module, the CPU module obtains the battery status information and sends it to the cloud server, and then starts the first sleep mode, waiting for next wake-up cycle;

Preferably, when the CPU module receives the scanning code opening command sent by the cloud server, the CPU module wakes up immediately, and wakes up the communication module and the barcode scanning module, and the CPU module sends a scanning enable command to the barcode scanning module, and the barcode scanning module starts scanning and Decode the barcode, and feed back the barcode information to the cloud server. When the CPU module receives the code scanning shutdown command sent by the cloud server, it starts the first sleep mode, and the barcode scanning module enters the sleep state, waiting for the next wake-up cycle;

Step 6) If the current lock status information fed back by the lock trigger module to the CPU module is information indicating that the lock is in an unlocked state, perform step 5);

If the current lock status information fed back by the lock trigger module to the CPU module is the information indicating that the lock is in the lock state, the CPU module will be awakened immediately and the communication module will be woken up, and the CPU module will receive the lock signal sent by the lock trigger module, and then control the The deadbolt driving member, the deadbolt driving member drives the deadbolt to move into the clamping portion of the key; the CPU module sends the current lock status information to the cloud server through the communication module (preferably, the CPU module also wakes up the voice module and controls it to play voice content) , and then start the second sleep mode, that is, the CPU module and each module enter the sleep state, but the CPU module also enters the sleep state but does not ignore or shield the level signal fed back by the locking trigger module and the instructions from the cloud server;

Step 7) When the shopping cart lock is in the locked state, the CPU module wakes up regularly according to the second period set by itself, and wakes up the communication module. The CPU module obtains the battery status information and sends it to the cloud server, and then starts the second sleep mode. Wait for the next wakeup cycle.

Preferably, the duration of the first cycle is shorter than the duration of the second cycle. Because there is no charging when the shopping cart lock is locked, the chance of waking up is minimized to save power.

The control method provided in this implementation 1 can reduce power consumption as much as possible and save power, thereby improving the service life of the power module. In addition, when unlocking and locking, voice prompts can be given to monitor the state of the battery, which is convenient for shopping cart locks. For maintenance, the barcode scanning module can realize the shopping cart lock and feed back the barcode information to the cloud server.

Embodiment 2. On the basis of Embodiment 1, FIG. 13 is a block diagram of the second type of lock control circuit in the shopping cart lock. The lock control circuit also includes a touch display screen communicably connected to the CPU module. The display screen is used to obtain the user account and password, and the touch display screen sends the obtained user account number and password to the CPU module, and the CPU module feeds back the user account number and password to the cloud server. The touch display screen is arranged on the outer surface of the lock body 2, which can be embedded or surface-mounted.

Figure 14 is a flow chart of the control method of the second lock control circuit. The control method of the lock control circuit part in Embodiment 2 is compared with the control method in Embodiment 1. Steps 4) to 7) are the same, but the difference is From step 1) to step 3): that is, step 1) initialization, the CPU module is woken up, the lock control module and the communication module are woken up, and the CPU module asks the lock trigger module for the current lock status information. There are two ways to wake up the CPU module , first, receive the wake-up command sent by the cloud server, and wake up the CPU module according to the wake-up command; second, click the touch screen, touch the screen to wake up the CPU module;

Step 2) The lock trigger module reports the current lock status information to the CPU module. If the current lock status information indicates that the lock is in an unlocked state, for example, the lock trigger module feeds back a high-level signal to the CPU module, and the CPU module determines that the shopping The car lock is in use, so start the first sleep mode, that is, the lock control module and the communication module enter the sleep state, and the CPU module also enters the sleep state but does not ignore or shield the level signal fed back by the lock trigger module and the signal from the cloud server. instruction, execute step 5);

Step 3) If the current lock status information is the information indicating that the lock is in the locked state, for example, the lock trigger module feeds back a low level signal to the CPU module, then the CPU module determines that the shopping cart lock is locked and judges that the CPU module is awakened mode; when the CPU module is awakened by touching the display to wake up the CPU module, the CPU module receives the user account and password obtained by the touch display, generates an unlock request, and feeds back the user account, password and unlock request to the cloud server. When the server receives the unlock request, it first verifies the user account and password, that is, judges whether the user account and password are consistent with the registered user account and password. If not, the verification fails, and the verification failure information is fed back to the CPU module. Touch the relevant modules of the display screen to prompt, for example, wake up the voice module for voice prompts, and \ or for prompts, perform step 1); if they are consistent, the verification is successful, the cloud server generates an unlock command, and the CPU module receives the unlock command sent by the cloud server ;

When the CPU module is awakened by the wake-up command sent by the cloud server, the CPU module receives the unlock command sent by the cloud server;

After the CPU module receives the unlock command sent by the cloud server, the CPU module sends a control command to the lock control module according to the unlock command, and the lock control module controls the bolt driving member, which drives the bolt to move out of the locking part of the key.

Preferably, the duration of the first cycle is shorter than the duration of the second cycle. Because there is no charging when the shopping cart lock is locked, the chance of waking up is minimized to save power.

The control method provided in this implementation 2 can reduce power consumption as much as possible and save power, thereby improving the service life of the power module. The touch screen can obtain the user account and password without using the mobile phone client to realize unlocking. In addition, When unlocking and locking, it can give voice prompts, monitor the battery status, and facilitate the maintenance of the shopping cart lock. The barcode scanning module can realize the shopping cart lock to feed back the barcode information to the cloud server.

Finally, it should be noted that: the above specific implementation methods are used to explain the invention, rather than limit the invention, and those of ordinary skill in the art can still modify the technical solutions described in the embodiments, and the present invention Any modification and change made by the creation should also be regarded as the protection scope of the invention.

Claims (10)

1. a kind of shopping lock characterized by comprising

Key is being equipped with clamping portion on the key；

Lock body is equipped with the keyhole being inserted into for key on lock body；

Connecting line, one end are connect with lock body, and the other end is connect with key, and the length guarantee of the connecting line can not be such that key inserts Enter into the keyhole for the lock body being connect with itself；

Lock tongue is arranged in lock body and is configured in the movement for that can move into clamping portion to stop key, or can remove card Socket part is to discharge the movement of key；

Lock tongue drive member is arranged in lock body comprising electric drive and switching component, the input terminal for component of transferring and drive The movement portion connection of dynamic device, the output end for component of transferring connect lock tongue, and the switching component is configured in the output of driver Power is converted to so that lock tongue moves in and out the driving force of clamping portion.

2. a kind of shopping lock as described in claim 1, which is characterized in that the electric drive is rotating electric machine, the lock Tongue one end is arranged in the limit hole on lock body, and limit hole makes lock tongue move along a straight line, the switching structure for limiting lock tongue rotation Part is configured as being converted to the rotating torque that rotating electric machine exports so that lock tongue moves in and out the driving force of clamping portion.

3. a kind of shopping lock as claimed in claim 2, which is characterized in that the switching component be include electrical machine belt pulley, skin Band and lock tongue belt wheel, the lock tongue appearance are provided with external screw thread, and electrical machine belt pulley appearance is provided with the circular belt grooves of a circle, electrical machine belt pulley The interior central axial direction along belt grooves is provided with connecting hole, and electrical machine belt pulley is fixed in the rotary shaft of motor by connecting hole, The lock tongue belt wheel appearance is provided with the circular belt grooves of a circle, and lock tongue belt wheel is interior to be provided with spiral shell along the central axial direction of belt grooves Pit, lock tongue, which is located in the threaded hole of lock tongue belt wheel, to be threadedly coupled, and lock tongue belt wheel can only locked under the action of limit component It is rotated in body, electrical machine belt pulley is connect by belt with lock tongue belt wheel transmission.

4. a kind of shopping lock as claimed in claim 2, which is characterized in that the switching component is motor gear, center tooth Wheel and lock tongue gear, the appearance of motor gear have a circle gear, and the inside of motor gear has the rotary shaft for being mounted on motor On connecting hole, the appearance of lock tongue gear has a circle gear, is provided with threaded hole along center axis thereof direction in lock tongue gear, Lock tongue, which is located in the threaded hole of lock tongue gear, to be threadedly coupled, and lock tongue gear can only revolve under the action of limit component in lock body Turn, intermediate gear connects motor gear with lock tongue gear drive.

5. a kind of shopping lock as claimed in claim 3, which is characterized in that the limit component includes that setting is being fixedly mounted Ladder hole on plate and the limited post that case inside face is set, the lower part of the lock tongue belt wheel be located in ladder hole with Limitation lock tongue belt wheel moves down, and the lock tongue runs through ladder hole, and the limited post contradicts the upper end of lock tongue belt wheel to limit Lock tongue belt wheel moves up.

6. a kind of shopping lock as described in claim 1, which is characterized in that the electric drive is electromagnetic coil assembly, institute Switching component is stated to be configured as being converted to electromagnetic coil assembly power output so that lock tongue removes or move into the driving of clamping portion Power, the electromagnetic coil assembly include shell, electromagnetic coil and electromagnet, and the shell is fixed in lock body, the electromagnet It being fixed in shell, the electromagnetic coil is wound on electromagnet, and the one end for component of transferring is connect by spring with electromagnet, The other end of switching component is connect with lock tongue.

7. a kind of shopping lock as described in claim 1, which is characterized in that the lock body, which has, to be mounted on shopping cart Mounting assembly.

8. a kind of shopping lock as described in claim 1, which is characterized in that the key and keyhole are equipped with so that key The guide frame of orientation insertion keyhole.

9. a kind of shopping lock as described in claim 1, which is characterized in that including trigger circuit plate and control panel, triggering electricity Road plate is communicatively connect with control panel, and the electric drive of lock tongue drive member is connect with control panel, and trigger circuit plate is fixed on It in lock body and is configured in and is triggered when key insertion keyhole is to locked position of coupler and sends trigger signal to control panel, control Plate is configured in connection wireless network, receives and instructs and control lock tongue drive member.

10. a kind of shopping lock as claimed in claim 9, which is characterized in that including bar code scanning module, bar code scanning module It is mounted in lock body, the side of lock body is provided with the barcode scanning window for the bar code outside bar code scanning module scanning lock body, control Plate and bar code scanning module communication connection.