CN112227838A

CN112227838A - Motor lock and vending cabinet based on motor lock

Info

Publication number: CN112227838A
Application number: CN202011413548.0A
Authority: CN
Inventors: 王万寿; 罗清江
Original assignee: Wuhan Sensor Electronics Co ltd
Current assignee: Wuhan Sensor Electronics Co ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-01-15

Abstract

The invention provides a motor lock which comprises a shell, a motor, a transmission part, a first spring, a lock tongue and a lock tongue sleeve. The transmission part is connected with a screw type driving shaft of the motor and can move in the shell; one end of the first spring is connected with the transmission piece, and the other end of the first spring is connected with the tail part of the lock tongue; the lock tongue is provided with a step, one side of the step is the tail part of the lock tongue, and the other side is the head part of the lock tongue; a portion of the head of the latch bolt may extend out of the housing through the latch bolt sleeve. When the motor drives the transmission piece to move from the starting position to the ending position, the transmission piece pushes the first spring, and the first spring pushes the lock tongue to extend out of the shell. The structure of the scheme is simple, the motor and the lock tongue are in the same straight line direction, and the direction of the acting force does not need to be subjected to complex conversion. The motor does not directly act on the spring bolt, and when the motor lock is in other dead states, the first spring plays a buffering role in the middle, so that the motor can be prevented from being burnt.

Description

Motor lock and vending cabinet based on motor lock

Technical Field

The invention relates to the field of door control, in particular to a motor lock and a vending cabinet based on the motor lock.

Background

In the field of door control, a lock is one of the essential parts. Different locks are suitable for different applications, for example: the magnetic lock is suitable for an access control system, and the electric mortise lock is suitable for places with high anti-theft level requirements. The most common in the field of vending machines is an electric mortise lock. The electric mortise lock drives the bolt to extend or retract through the on-off of current, and the magnetic sheets are matched to realize the door locking or unlocking of the cabinet. The electric mortise lock has complex structure, more electronic elements and high failure rate, and influences the manufacturing cost and the maintenance cost of the sales counter.

Disclosure of Invention

The invention aims to provide a lockset which is simple in structure, low in cost and reliable in performance.

Specifically, a motor lock includes:

a housing;

a motor including a screw-type drive shaft;

the transmission part is connected with the screw type driving shaft, is driven by the motor and can move in the shell;

one end of the first spring is connected with the transmission piece, and the other end of the first spring is connected with the tail part of the lock tongue;

the lock tongue is provided with a step, one side of the step is the tail part of the lock tongue, and the other side of the step is the head part of the lock tongue;

the part of the head of the lock tongue can penetrate through the lock tongue sleeve and extend out of the shell;

the head of the lock tongue is sleeved with a second spring, the elastic force of the second spring is smaller than that of the first spring, and the second spring is blocked between the step of the lock tongue and the lock tongue sleeve by the lock tongue sleeve.

When the motor drives the transmission piece to move from the starting position to the ending position, the transmission piece pushes the first spring, the first spring pushes the lock tongue to extend out of the shell, and the second spring is compressed; when the motor drives the transmission part to move from the termination position to the starting position, the second spring is restored, and the second spring drives the lock tongue to move towards the shell. The installation of arbitrary direction can be realized to the electromechanical lock like this, and the spring bolt does not rely on gravity to withdraw the casing, but because the effort of second spring withdraws the casing. The elasticity of the second spring is smaller than that of the first spring, so that the second spring does not reduce the thrust of the first spring to the lock tongue in the locking process of the motor lock. The structure of the scheme is simple, the motor and the lock tongue are in the same straight line direction, and the direction of the acting force does not need to be subjected to complex conversion. The motor does not directly act on the spring bolt, has set up first spring between motor and spring bolt, and the spring bolt of being connected with first spring can stretch out the casing of motor lock under the thrust of first spring, is in when not dead state when the motor lock, because the motor is not direct drive spring bolt, first spring has played the cushioning effect in the centre to can prevent that the motor from being burnt, reduce the maintenance rate of motor lock.

Preferably, the casing is provided with a maintenance hole, and when the head of the lock tongue extends out of the casing, the first spring can be touched through the maintenance hole. When the motor lock of this scheme is installed and is broken down and can not unblank in the sales counter, when needing to return the factory maintenance, can pound open glass, and the use tool is through the first spring of maintenance hole compression of motor lock, unblanks by force. Therefore, only the cabinet door of the sales counter can be damaged without dismounting the motor lock, and simple maintenance is realized.

Preferably, the shell comprises a stroke groove, and a transmission part, a first spring, a lock tongue and a lock tongue sleeve are sequentially fixed in the stroke groove; the stroke groove comprises a first limiting part and a second limiting part; the transmission part comprises a bulge; the first limiting part, the second limiting part and the protrusion are matched with each other to limit the starting position and the ending position of the movement of the transmission piece. If the movement stroke of the transmission part is controlled by the rotation time of the motor, because the motor has a time duration of inertia from movement to complete standstill, the stroke reliability of the transmission part is controlled by controlling the time duration of the rotation of the motor, and the reliability and the precision of the transmission part can be improved by a structural limit mode.

Preferably, the stroke groove comprises a third limiting part, and the third limiting part is matched with the step of the lock tongue to limit the stop position of the lock tongue in motion. The movement stroke of the lock tongue is limited, so that the lock tongue and the transmission piece keep the same displacement.

Preferably, the housing includes a card slot in which the circuit board is disposed. When the special application requirements cannot be met only by stretching the lock tongue, the personalized function can be added through the circuit board.

A second aspect of the invention provides a vending cabinet based on electromechanical locks.

Concretely, sales counter based on motor lock, include as the first aspect the motor lock and with motor lock complex hasp, the hasp includes lockhole portion and installation department, the lockhole of lockhole portion with the spring bolt cooperation of motor lock, the installation department is used for fixed with the cabinet door of sales counter. The lockset can be arranged at the upper end, the lower end or the middle end of a sales counter. The motor lock adopts the motor to control the lock tongue, and has stability and controllability, thereby ensuring good anti-theft performance. The motor indirectly drives the bolt, and when the motor lock is locked, the motor can be prevented from being burnt.

Drawings

FIG. 1 is a schematic view of a motor lock in cooperation with a latch;

FIG. 2 is a schematic view of the internal structure of the motor lock;

FIG. 3 is a schematic view showing the three-dimensional effect of the internal structure of the motor lock;

fig. 4, an exploded view of the motor lock assembly;

FIG. 5 is an exploded view of the motor lock including a circuit board;

FIG. 6, a schematic diagram of a circuit board;

FIG. 7 is an exploded view of the motor lock and latch;

FIG. 8 is a partially exploded view of the motor lock;

fig. 9 is a schematic view of a locked state;

fig. 10, an unlocked state schematic.

The reference numbers in the figures illustrate: 01-electric motor lock, 02-lock catch; 11-a lower shell, 111-a first limit part, 112-a second limit part, 113-a third limit part, 114-a through hole, 12-an upper shell, 121-a maintenance hole, 21-a motor, 211-a screw-type driving shaft, 212-a shaft sleeve, 22-a transmission piece, 221-a bulge, 23-a first spring, 24-a lock tongue, 241-a step of the lock tongue, 242-a tail part of the lock tongue, 243-a head part of the lock tongue, 25-a second spring and 26-a lock tongue sleeve; 31-circuit board, 311-first position switch, 312-second position switch, 313-third position switch, 314-fourth position switch, 315-inductive switch; 41-a lock hole part of the lock catch, 42-a mounting part of the lock catch, 411-a lock hole, 421-a top column and 422-a trigger.

Detailed Description

In order to make the technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. It is to be understood that the described embodiment may be preferred, but is intended to cover only some, but not all, embodiments of the invention.

In the description of the present invention, it should be understood that the terms "upper", "middle", "lower", "vertical", "head", "tail", "inner", "outer", "start position", "end position", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and should not be construed as limiting the present invention.

Furthermore, the description of the invention herein of "first," "second," and similar language does not denote any order, quantity, or importance, but rather the intention is to distinguish one element from another having the same or similar function.

Fig. 1 shows a schematic diagram of the motor lock and the lock catch. For example: in the sales counter, motor lock 01 installs in the cabinet body, and hasp 02 is installed on the cabinet door, can realize the management and control to the sales counter. For example: in a security door, the motor lock 01 is installed in a fixed door cavity and the striker 02 is installed in a movable door.

Fig. 2 to 4 show a specific embodiment of the internal structure of the motor lock. The motor lock includes a housing. The housing includes an upper shell 12 and a lower shell 11. The lower shell 11 includes a motor cavity and a travel slot therein. The motor cavity is fixed with a motor main body, and a screw type driving shaft 211 of the motor 21 extends into the stroke groove. A transmission member 22 is disposed in the stroke groove. The stroke groove comprises a first limit part 111 and a second limit part 112, and the transmission piece 22 comprises a projection 221. The first and second position-limiting

portions

111 and 112 and the protrusion 221 of the transmission member cooperate to limit the start and end positions of the movement of the transmission member 22. The spindle-type drive shaft 211 of the electric motor and the transmission element 22 are connected by a bushing 212. Sleeve 212 may be a separate piece embedded in driving member 22. Alternatively, the transmission member 22 is provided with an internal bore provided with a thread for mating connection with the screw-type drive shaft 211, without the need for a separate shaft sleeve 212. A first spring 23 is also placed in the travel slot. One end of the first spring 23 is connected to the driving member 22, and the other end is connected to the tail 242 of the latch bolt. The locking tongue 24 is provided with a step 241, one side of the step 241 is a tail 242 of the locking tongue, and the other side is a head 243 of the locking tongue. The tail part 242 of the bolt is connected with the first spring 23, the head part 243 of the bolt is sleeved with the second spring 25, and the elastic force of the second spring 25 is smaller than that of the first spring 23. The travel groove comprises a third limiting part 113, and the step 241 of the lock tongue is in limiting fit with the third limiting part 113 to limit the stop position of the motion of the lock tongue. A latch cover 26 is also provided in the lower case 11. The strike sleeve 26 blocks the second spring 25 between the step 241 of the strike and the strike sleeve 26, and a portion of the head 243 of the strike can extend out of the housing through the strike sleeve 26. When the motor 21 drives the transmission member 22 to move from the starting position to the ending position, the transmission member 22 pushes the first spring 23, the first spring 23 pushes the bolt 24 to extend out of the shell, and the second spring 25 is compressed; when the motor 21 drives the transmission member 22 to move from the termination position to the start position, the second spring 25 is restored, and the second spring 25 drives the latch bolt 24 to move into the housing. The installation of arbitrary direction can be realized to the electromechanical lock like this, and the spring bolt relies on the shape of second spring to recover and retract the casing. Because the elasticity of the second spring is less than that of the first spring, the second spring does not reduce the thrust of the first spring to the lock tongue in the locking process of the motor lock.

The motor lock has a simple structure, the motor and the bolt are in the same straight line direction, and the direction of the acting force does not need to be converted in a complex way. The motor lock can be applied to equipment only needing an anti-theft function. For example: an alternative application is sales counter. In medium and large-scale sales counter, the cabinet door adopts metal and glass to make, and is comparatively heavy, and the time is longer, and the easier the cabinet door warp or the tatami down, leads to spring bolt and lockhole to incline to some extent, and the spring bolt is lived by other easily. For example: the in-process of locking, the lockhole of cabinet door can't be aimed at to the spring bolt of motor lock, if the motor in the tool to lock is direct to be connected with the spring bolt, the motion of motor shaft direct drive spring bolt, the spring bolt is withstood and can not move, and the motor does not have the stop motion yet, and at this moment the electric current of motor can rise, and the motor is very easily burnt. For example: in the unlocking process, the lock hole is inclined and is meshed with the lock tongue too tightly, the lock tongue is clamped and cannot retract into the shell, and if a motor in the lock is directly connected with the lock tongue, the motor drives the lock tongue by force, so that the current is increased, and the motor is burnt out. And the motor does not directly act on the spring bolt in this scheme, has set up first spring between motor and spring bolt, and the motion of spring bolt is promoted by first spring, and when locking in-process spring bolt was died by the top, the motion of motor drive driving medium, the first spring that is in between driving medium and the spring bolt is compressed by force, and first spring has played the cushioning effect in the centre to can prevent that the motor from being burnt, reduce the maintenance rate of motor lock. When the spring bolt is bitten in the unlocking process, the motor can only drive the transmission piece to move, and the spring bolt is not moved, so that the motor is prevented from being burnt. The motor lock in this scheme is at the normal locking or unblock in-process, and the deformation of first spring can be ignored almost, can guarantee to promote the effective stroke of spring bolt at the thrust of locking the in-process to the spring bolt last. Only when the spring bolt appears not firmly and can't normally stretch out at last lock in-process, when the motor moves by force, just first spring can be compressed to play the effect of protection motor.

And a maintenance hole is formed in the shell of the motor lock. Preferably, the upper shell 12 is provided with a service hole 121 and the lower shell 11 is provided with a corresponding service hole (not shown in the figures). Optionally, one surface of the upper shell or the lower shell is used as a mounting surface, and the maintenance holes are only arranged on the non-mounting surface. When the head of the lock tongue extends out of the shell, the first spring can be touched through the maintenance hole. When the motor lock of this scheme is installed and is broken down and can not unblank in the sales counter, when needing to return the factory maintenance, can pound open glass, and the use tool inserts the first spring of maintenance hole compression, unblanks by force. For example: the cabinet door warp and causes the spring bolt of motor lock to be lived by other, and the motor lock does not have the trouble, but the motor lock also can't the unblock, and at this moment can only destroy the cabinet door of sales counter and need not dismantle the motor lock, realizes the simple and easy maintenance of motor lock.

The first limiting part and the second limiting part in the stroke groove of the motor lock are matched with the protrusions of the transmission piece to limit the starting position and the ending position of the motion of the transmission piece. The motion stroke of the transmission part is controlled by the rotation time of the motor, and because the motor has a long inertia time from motion to complete rest, the stroke reliability of the transmission part is controlled by controlling the rotation time of the motor to be poor, and the reliability and the precision of the transmission part can be improved by a structural limiting mode. The third limiting part of the travel groove is matched with the step of the lock tongue to limit the stop position of the motion of the lock tongue. The movement stroke of the lock tongue is limited, so that the lock tongue and the transmission piece keep the same displacement.

For the application scene only needing the anti-theft function, the motor lock only needs to control the motor to rotate forward and backward, and the lockset can completely meet the application requirement. When only the bolt is telescopic, some special application requirements cannot be met, for example, in an unmanned sales counter, whether a motor lock is locked in place or unlocked is very necessary for some logic judgment, and then more functions can be added on the basis of only controlling the motor.

With reference to fig. 5 to 7. The housing includes a card slot in which a circuit board 31 is disposed. The circuit board 31 is fixed in the card slot, and is parallel with the stroke slot, and the one side of the circuit board 31 facing the stroke slot includes first position switch 311 and second position switch 312, and first position switch 311 corresponds with the initial position of driving medium (first spacing portion 111 department of stroke slot in the drawing), and second position switch 312 corresponds with the terminal position of driving medium (second spacing portion 112 department of stroke slot in the drawing), and the one side of the circuit board facing the stroke slot still includes third position switch 313, and third position switch 313 corresponds with the terminal position of step 241 of spring bolt (third spacing portion 113 department of stroke slot in the drawing). The side of the circuit board facing away from the stroke slot comprises a fourth position switch 314, the side of the housing further comprises a through hole 114, and the position of the through hole 114 corresponds to the fourth position switch 314. The lock catch 02 matched with the motor lock comprises a lock hole part 41 and an installation part 42, a lock hole 411 of the lock hole part 41 corresponds to the lock tongue 24, and the installation part 42 further comprises a top column 421 corresponding to the through hole 114. In the unmanned sales counter, the motor lock 01 is installed on the cabinet body, and the lock catch 02 is installed on the cabinet door. When the cabinet door is closed, the top column 421 on the lock catch touches the fourth position switch 314 of the motor lock, so that the sales counter can judge that the cabinet door is closed in place according to the signal. In the invention, the first position switch, the second position switch, the third position switch and the fourth position switch are all touch switches, and signals need to be obtained through direct touch.

Particularly, the unmanned sales counter based on image recognition automatically settles accounts after opening the door to obtain the commodity required by the self and closing the door, and the sales counter judges the commodity obtained by the user to form a purchase order at the server end based on the image recognition technology. The unmanned sales counter based on image recognition comprises a camera, wherein the camera is connected to a processor, and the processor is connected with a background server through a network; the camera shoots real-time image information of goods to be sold on the goods shelf and sends the real-time image information to the background server through the processor; and the background server identifies the commodities and the quantity taken away by the user according to the image information before opening the cabinet and after closing the cabinet for settlement. Therefore, such devices need to obtain signals through the device side for the server to make some judgments. Not only needs to obtain unlocking and locking information through the equipment end, but also needs to identify the manual actions such as opening and closing the door. In order to improve the reliability of identification, the side of the circuit board opposite to the stroke slot also comprises an inductive switch 315, and the mounting part of the lock catch also comprises a trigger 422 matched with the inductive switch 315. The inductive switch can be a reed switch or a Hall element, and the trigger piece can be a magnet or magnetic steel. The inductive switch and the trigger may also be a pair of light sensitive switches. The inductive switch is a non-touch switch, and obtains signals through magnetic induction or light induction.

Unmanned sales counter based on image recognition has higher requirements on the theft prevention of equipment. The existing sales counter generally adopts an electric mortise lock, and a lock is arranged at the top end. Because the only upper end of cabinet door is locked, the lower extreme of cabinet door can be opened the slit, still can steal the action through the slit. An effective solution is to install an electric mortise lock at the lower end of the sales counter, but this increases the cost of the equipment and the risk of managing two locks is higher than that of managing one lock. Therefore, the motor lock can be arranged in the middle of a sales counter, and the lock catch is arranged in the middle of the cabinet door and matched with the motor lock. This reduces the risk of failure, i.e. without increasing the cost of the sales counter.

The control method of the sales counter based on the image recognition comprises the following steps:

when the sales counter receives an unlocking instruction, the motor of the motor lock drives the transmission piece to move from the termination position to the starting position, and the motor lock is judged to be unlocked according to the received closing signal of the first position switch; then, according to the received disconnection signals of the fourth position switch and the induction switch, the cabinet door of the sales counter is judged to be pulled open;

and judging that the cabinet door of the sales counter is closed according to the received closing signals of the fourth position switch and the inductive switch, driving a transmission member to move from a starting position to a terminating position by a motor of the motor lock, and judging that the motor lock is locked according to the received closing signals of the second position switch and the third position switch.

Referring to fig. 6 to 10, when the sales counter receives an unlocking command triggered by a user, the motor of the motor lock drives the transmission member to move from the ending position to the starting position, that is, the latch bolt moves toward the interior of the housing, when the latch bolt is completely retracted to the position, the protrusion 221 on the transmission member of the motor lock touches the first position switch 311, so that the first position switch 311 triggers a signal, and then the unlocking is really successful. In the process, if the bolt retracts to half and is clamped, the protrusion 221 cannot touch the first position switch 311, so that the possibility of equipment failure can be sequentially judged. And it is clearly inaccurate if the travel of the bolt is determined by time alone. In the sales counter based on image recognition, the successful unlocking only represents that the cabinet door is in a state of being opened, but the cabinet door is not pulled at all, and further judgment is needed. In the present embodiment, the triggering signals of the fourth position switch 314 and the inductive switch 315 are triggered by the top pillar 421 and the triggering member 422 of the latch. And the hasp is installed on the cabinet door, consequently can be used for judging whether the cabinet door is pulled open, and only the cabinet door is pulled open the user and just probably is got commodity in the cabinet body. When the cabinet door is opened, the camera in the cabinet body can start to collect image information, the user takes goods away, the user closes the door and then collects the image information, and the image information before and after opening and closing the cabinet is compared, so that an order is generated. Therefore, whether the cabinet door is closed or not and whether the motor lock extends into the lock hole of the lock catch to lock the sales counter or not need to be judged in a complete purchasing process. When a user takes a commodity to close the cabinet door, after the top column 421, the trigger piece 422, the fourth position switch 314 and the inductive switch 315 on the lock catch trigger signals, the motor of the motor lock drives the transmission piece to move from the starting position to the ending position, i.e., the lock tongue moves outward from the casing, and when the protrusion 221 of the transmission piece touches the second position switch 312 and the step 241 of the lock tongue touches the third position switch 313, the trigger signals of the second position switch 312 and the third position switch 313 can indicate that the motor lock is really locked. In the process, if the bolt is misaligned with the buckle or the bolt is stretched to half and cannot advance, the step 241 of the bolt cannot touch the third position switch 313, so that the possibility of equipment failure can be judged.

The control method of the sales counter based on image recognition needs to judge the completion of a normal order through the unlocking of the electric motor lock, the opening of the door, the closing of the door and the locking of the electric motor lock. According to the scheme, the start and the end of a normal order can be obtained through signal transmission and logic judgment of the equipment side.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified and recombined, or some technical features may be equivalently replaced; and the modifications, the recombination or the replacement do not make the essence of the corresponding technical scheme depart from the scope of the technical scheme of the embodiments of the invention.

In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.

Claims

1. A motor lock, comprising:

a housing;

a motor including a screw-type drive shaft;

the part of the head of the lock tongue can penetrate through the lock tongue sleeve and extend out of the shell; the head of the lock tongue is sleeved with a second spring, the elastic force of the second spring is smaller than that of the first spring, and the second spring is blocked between the step of the lock tongue and the lock tongue sleeve by the lock tongue sleeve.

2. A motor lock according to claim 1, characterised in that: the casing sets up the maintenance hole, and when the head of spring bolt stretched out the casing state, can touch first spring through the maintenance hole.

3. A motor lock according to claim 1, characterised in that: the shell comprises a stroke groove, and a transmission part, a first spring, a lock tongue and a lock tongue sleeve are sequentially fixed in the stroke groove; the stroke groove comprises a first limiting part and a second limiting part; the transmission part comprises a bulge; the first limiting part, the second limiting part and the protrusion are matched with each other to limit the starting position and the ending position of the movement of the transmission piece.

4. A motor lock according to claim 3, characterised in that: the stroke groove comprises a third limiting part, and the third limiting part is matched with the step of the lock tongue to limit the stop position of the lock tongue in motion.

5. A motor lock according to claim 1, characterised in that: the shell comprises a clamping groove, and a circuit board is arranged in the clamping groove.

6. The utility model provides a sales counter based on motor lock which characterized in that: the electric motor lock comprises the electric motor lock as claimed in any one of claims 1 to 5 and a lock catch matched with the electric motor lock, wherein the lock catch comprises a lock hole part and a mounting part, a lock hole of the lock hole part is matched with a lock tongue of the electric motor lock, and the mounting part is used for being fixed with a cabinet door of a sales counter.