CN109881988B

CN109881988B - Lockset with emergency unlocking structure

Info

Publication number: CN109881988B
Application number: CN201910209630.2A
Authority: CN
Inventors: 马宗献; 麦政华
Original assignee: Guangdong Archie Hardware Co ltd
Current assignee: Guangdong Archie Hardware Co ltd
Priority date: 2019-03-19
Filing date: 2019-03-19
Publication date: 2023-10-03
Anticipated expiration: 2039-03-19
Also published as: CN109881988A

Abstract

The lockset with the emergency unlocking structure comprises a lock body, wherein the lock body comprises a lock shell, and the lockset is characterized in that a square tongue assembly used for locking, a first shifting arm used for driving the square tongue assembly to realize locking and unlocking, and an electric mechanism used for driving the first shifting arm to rotate are arranged in the lock shell, and the first shifting arm drives the square tongue assembly to lock or unlock in a shifting manner; the second shifting arm is rotatably arranged in the lock shell or directly connected to the manual driving mechanism, and when the manual driving mechanism is combined to the lock body, the second shifting arm can be driven by the manual driving mechanism to drive the square bolt assembly to lock or unlock in a shifting mode.

Description

Lockset with emergency unlocking structure

Technical Field

The invention relates to a lockset, in particular to a lockset which uses an electric mode as a normal unlocking and locking structure and uses a manual (key or handle) mode as a standby unlocking and locking structure, wherein the manual standby unlocking is used as an emergency standby unlocking means only when the electric unlocking and locking mechanism cannot be normally unlocked under the abnormal fault conditions such as damage, power failure, failure and the like.

Background

The existing intelligent lockset particularly adopts an electric unlocking lockset, and a standby unlocking and locking means is required to be arranged from the safety aspect. Mechanical key unlocking is generally widely used as a conventional alternative to intelligent electric locks. The door is unlocked by adopting a mechanical key under the abnormal emergency conditions of failure, insufficient electric quantity and the like of an electric unlocking mechanism. But different spare unlocking means and methods are adopted for the electric lock body structures with different structures.

For example, the patent application number is 201320548219.6, the technical scheme of a TM card fingerprint intelligent lock is disclosed, the TM card fingerprint intelligent lock comprises an electric control lock body, an indoor lock cover plate, an outdoor lock cover plate and a controller for controlling a motor driving device, wherein a fingerprint identifier and a TM card induction port are arranged on the outdoor lock cover plate; the controller comprises a main controller, a standby controller and a power supply, wherein the main controller and the standby controller are respectively connected with a motor driving device for driving the electric control lock; the fingerprint identifier and the TM card induction port are respectively connected with the main controller and the standby controller, and the information collected by the fingerprint identifier and the TM card induction port is communicated with the main controller and the standby controller. This solution discloses a solution for driving the motor drive with two circuits, which is in fact a superposition solution of 1+1=2, which, although being able to greatly reduce the probability of failure, still does not disclose an emergency unlocking solution, or how to enable other alternative solutions, such as mechanical keys, after the two circuits have been damaged.

For example, the technical scheme of the electronic lock with the standby system is disclosed in the patent application number 201410172102.1, and the technical scheme is that the electronic lock with the standby system comprises an input module, a control module, a driving module, a power module, a self-checking module and a standby module; the standby module mainly comprises a mechanical lock cylinder body, a main marble, a mechanical lock core, a mechanical lock key hole, marble contacts, a charging coil iron core, a charging coil, a marble slideway, a discharging coil iron core, a standby circuit board, an electric storage capacitor, a charging signal wire and a discharging signal wire. The charging coil, the discharging coil and the storage capacitor can control the position of the main marble when the electronic lock is normal and fails, and enable or disable the standby module. This solution mainly discloses the improved structure of the spare mechanical lock cylinder itself, but does not disclose how to deal with the problem of coordination with the normally open lock locking mechanism.

For example, patent application number 201710100933.1, the name is "an intelligent door lock", discloses an intelligent door lock, including outer handle, outer handle seat, the lock body, interior handle seat and interior handle that connect gradually, still include power strip, mainboard, motor, actuating mechanism and power, the lock body is including lock core and the spring bolt of mutual contact, be provided with the expansion board on the mainboard, be connected with on the power strip and switch and pull out the button, motor, power strip and mainboard all are connected with the power, mainboard and expansion board all are connected with the motor, the expansion board is pulled out the button through the switch and is connected with the power, the motor passes through actuating mechanism and is connected with the lock core. This solution, which is substantially the same as the one of 201320548219.6, is a solution that is expressed differently but substantially the same, and emphasizes the use of a 1+1=2 standby circuit scheme, but still does not disclose how to cooperate with a mechanical key for standby.

Disclosure of Invention

In view of the above, it is apparent that, unlike the prior art, it is not only the problem that can be solved by using a 1+1=2 electronic backup drive or control loop, but also by merely improving the backup manual drive section, it is necessary to first solve how to coordinate the electric drive section and the manual drive section so that locking and unlocking can be achieved by the manual drive section at any time; secondly, comprehensively consider how to realize the standby unlocking to improve the safety, and the standby scheme can not become a new potential safety hazard while the standby scheme plays a role.

According to the above object, the present invention provides a lock with an emergency unlocking structure, comprising a lock body, wherein the lock body comprises a lock housing, and the lock is characterized in that a latch bolt, a square bolt assembly for locking, a first shifting arm for driving the square bolt assembly to realize locking and unlocking, and an electric mechanism for driving the first shifting arm to rotate are arranged in the lock housing, and the first shifting arm drives the square bolt assembly to lock or unlock in a shifting manner; the second shifting arm is rotatably arranged in the lock shell or directly connected to the manual driving mechanism, and when the manual driving mechanism is combined to the lock body, the second shifting arm can be driven by the manual driving mechanism to drive the square bolt assembly to lock or unlock in a shifting mode; the electric mechanism drives the first shifting arm to be further driven to be separated from the square tongue assembly after locking or unlocking is completed, the first shifting arm is kept at a safe position, the first shifting arm is kept at the safe position, the first shifting arm can avoid the square tongue assembly at the moment, and the manual driving mechanism is used for driving the square tongue assembly to move to lock or unlock through the second shifting arm when the first shifting arm is kept at the safe position.

The manual driving mechanism is another set of unlocking and locking standby mechanism which is arranged on the lockset and is completely separated from the electric mechanism, and the manual driving mechanism comprises an operating mechanism which has safety and can not be operated at will by a bad person, such as a mechanical lock liner which can be unlocked by means of a lock key, and the like. Because the second shifting arm is controlled by the manual driving mechanism, the position of the second shifting arm can be modulated manually at will, and after unlocking is finished, the second shifting arm can be manually adjusted to leave the square tongue assembly without generally forming an obstacle to the movement of the square tongue assembly.

Wherein the second dial arm is rotatably disposed in the lock housing or directly connected to the manual drive mechanism, the feature defining two alternative arrangements of the second dial arm, a first arrangement being that the second dial arm is rotatably disposed in the lock housing, e.g., directly rotatably disposed on the rotational axis of the lock housing; the second layout mode is that the second shifting arm is directly connected to the manual driving mechanism, for example, when the manual driving mechanism is a mechanical lock liner, the second shifting arm is directly connected to an output shaft of the mechanical lock liner. When the second layout mode is applied, the second shifting arm and the manual driving mechanism are combined into a functional module which can be detached from the lock body under the general condition, and the manual driving mechanism is required to be combined onto the lock body under the specific application scene.

The safety position is a region where the first shifting arm further moves away from the square tongue assembly to stop after the square tongue assembly is driven to lock or unlock, and the region does not obstruct the smooth axial movement of the square tongue assembly under the drive of the second shifting arm.

The lockset is generally provided with two kinds of lock tongues, namely a square tongue component and an oblique tongue component. The tongue assembly generally includes a tongue blade and a tongue head disposed at a front end of the tongue assembly blade. In a general lockset design, the inclined tongue is generally called a windproof tongue and is mainly used for temporarily locking a door leaf, the inclined tongue mechanism generally has a self-resetting function, so that clamping stagnation is not formed on a poking arm, and the main object of the technical scheme of the invention is a square tongue component. According to the conventional design scheme, the square tongue assembly generally further comprises a clamping plate for clamping the square tongue assembly, the clamping plate is arranged in the lock body in a sliding manner and used for preventing the square tongue assembly from being axially pressed back by external force after extending, and the poking arm can generally push the clamping plate to move simultaneously to release the clamping of the square tongue assembly when poking the square tongue assembly to move. Since these are conventional designs and are not the gist of the present invention, the present invention is not further described.

According to the technical scheme, compared with the prior art, the invention has the beneficial technical effects that: in normal operation, the electric mechanism not only can drive the first shifting arm to complete locking or unlocking, but also can further drive the first shifting arm to be separated from the square tongue assembly and stay at a safe position, so that a preparation condition is provided for the second shifting arm to drive the square tongue assembly to move at any time. The first shifting arm at the safety position is not only separated from the square tongue assembly, but also moves away from the moving path of the square tongue assembly, at the moment, the first shifting arm cannot be an obstacle for the movement of the square tongue assembly, and under the driving of the second shifting arm, the square tongue assembly can smoothly complete locking or unlocking through movement.

The further technical scheme can be that an inner circuit board is further arranged in the lock shell, an inner controller and a motor main driver which is connected with the inner controller in a signal way are arranged on the inner circuit board, and the motor main driver controls and drives the electric mechanism; the novel electric lock is characterized by further comprising an outer lock panel and an inner lock panel, wherein an outer circuit board is further arranged on the outer lock panel or the inner lock panel, an outer controller and a motor standby driver which is in signal connection with the outer controller are arranged on the outer circuit board, the motor standby driver also controls and drives the electric mechanism, and the inner controller is in signal connection with the outer controller; an outer locking button is arranged on the outer locking panel, and the outer locking button is in signal connection with the outer controller; the outer locking button is used for controlling and driving the electric mechanism to act through the inner controller and the motor main driver according to a starting instruction of the outer locking button when the outer locking button is started, so that the door is locked in a forced mode, or directly controlling and driving the electric mechanism to act through the motor standby driver when the inner circuit board breaks down, so that the door is locked in a forced mode.

Wherein the outer circuit board and the inner circuit board are independent from each other in mechanical structure and physical space, but signals acquired by the outer circuit board and the inner circuit board can be exchanged and transmitted through the inner controller and the outer controller. For example, the external controller may send an unlocking instruction or a locking instruction to the internal controller, and after the internal controller receives the unlocking instruction or the locking instruction of the external controller, the internal controller drives the square tongue component to complete unlocking or locking through the motor main driver and the electric mechanism, and feeds an unlocking completion signal or a locking completion signal back to the external controller. And secondly, the outer controller and the motor standby driver take the outer circuit board as a layout carrier, and can independently drive the electric mechanism to act when the inner circuit board fails.

The motor main driver mainly controls and drives the electric mechanism to work normally under the normal working condition, so that normal unlocking and locking work is realized. The motor standby driver mainly has abnormal working conditions, for example, the motor standby driver can replace the motor main driver to control and drive the electric mechanism under the condition that the motor main driver or the internal controller fails and can not control the electric mechanism to work.

The outer locking button can be a mechanical touch button or an electronic touch and trigger button; and the external locking button can be a special button or a plurality of combination buttons, and can also give a control signal after pressing the plurality of combination buttons.

According to the technical scheme, after the outer locking button is started, the forced locking can be finished through two control loops:

first, main control circuit, outer lock button is used for when starting outer lock button the outer controller is according to outer lock button's start command, through interior controller with the action of motor main drive control drive electric mechanism is thereby implementing the forced locking outside the door. The scheme belongs to a control loop which is preferentially selected when the outer locking button is started, and is generally applied to the situation that the inner controller and the motor main driver can still work normally, so that the inner controller and the motor main driver can still participate in the control loop to control and drive the electric mechanism to act outside a door to lock, the first shifting arm can be separated from the square tongue component to stay at the safe position, and then unlocking can be realized through the manual driving mechanism.

And secondly, a standby control loop directly controls and drives the electric mechanism to act through the motor standby driver when the inner circuit board fails, so that the forced locking is implemented outside the door. The scheme belongs to a standby control loop which is automatically switched when the outer locking button is started under the condition that the inner circuit board fails. The internal circuit board breaks down and comprises abnormal situations such as damage, power failure, failure and the like of a certain link of the motor main driver or the internal controller, which can not work, or abnormal situations such as damage sent by a printed circuit on the internal circuit board. In this case, the motor main driver cannot control and drive the electric mechanism to operate, so that the motor spare driver replaces the motor main driver to control and drive the electric mechanism to operate. In practical applications, the damage of the inner circuit board may cause the latch assembly to be still combined with the first shifting arm and be in a clamping position, the motor standby driver is started to drive the electric mechanism to act so as to drive the first shifting arm to rotate in the locking direction, the first shifting arm can be driven to be separated from the latch assembly and stay in a safe position, at the moment, the obstacle of movement of the latch assembly is cleared, the manual driving mechanism can be used for driving the second shifting arm to drive the latch assembly to move for unlocking, and the locking can be realized, however, the latch assembly is in the locking state at the moment, and the manual driving mechanism is not required for locking. The manual driving mechanism can be safely used for entering a room after unlocking, and the lockset is convenient to disassemble and maintain from the inside of the door, so that destructive door opening is not needed to be implemented outside the door. The problem to be solved by the second control loop is how to solve the unlocking problem effectively when the inner circuit board is damaged, and the solution is designed around the problem. Of course, if the inner circuit board is damaged, the square tongue component and the first shifting arm are not combined and blocked, and at the moment, the first shifting arm is already positioned at the safe position, and the manual driving mechanism is directly used for unlocking and locking.

The outer locking button and the motor standby driver are not started at will in the normal open lock locking use, but the motor standby driver is a standby control loop which can drive the electric mechanism to act and can be completely used by a bad person for unlocking; therefore, no matter the motor standby driver or the motor main driver is started through the outer locking button, the square tongue component can only be locked but not unlocked, and the aim of unlocking the motor standby driver and the motor main driver by using the influence of the outer locking button on the work of the motor standby driver and the motor main driver can be avoided. However, it is not excluded that the first pulling arm is driven by the electric mechanism to rotate in the unlocking direction after the external locking button is activated, as long as the rotation range is properly controlled so that the first pulling arm cannot achieve pulling of the tongue assembly to unlock.

According to the technical scheme, the electric mechanism is opened in a standby mode through the outer locking button and the motor standby driver, and the standby loop cannot be a path opposite to a path on which a bad person can perform dangerous behaviors, so that locking safety can be enhanced; and the first shifting arm can be separated from the square tongue assembly by utilizing the standby loop, so that convenience is brought to unlocking by adopting a standby manual driving mechanism, namely, the standby loop can only lock the square tongue assembly instead of unlocking the square tongue assembly, and unlocking obstacles are cleared for other mechanical standby unlocking means.

Further technical scheme can also be, still include the door leaf position sensor that is used for detecting the door leaf position, door leaf position sensor with interior controller signal connection, outer lock button is used for when door leaf position sensor is malfunctioning carries out the forced locking outside the door. According to the technical scheme, the door leaf position sensor can be sensing devices such as an infrared sensor and a Hall effect sensor, and can transmit a door leaf position signal to the inner controller, the inner controller judges whether the door leaf is closed in place according to the door leaf position signal, and if the door leaf is closed in place, the motor main driver controls and drives the electric mechanism to act so as to automatically complete locking. And when the door leaf position sensor fails, the outer locking button can be started, and the outer controller controls and drives the electric mechanism to act through the inner controller and the motor main driver according to a starting instruction of the outer locking button so as to implement forced locking outside the door, or directly controls and drives the electric mechanism to act through the motor standby driver when the inner circuit board fails so as to implement forced locking outside the door.

A further technical solution may be that the lock further comprises a latch assembly arranged in the lock housing, a latch position sensor for detecting a latch extension position, the latch position sensor being in signal connection with the inner controller, the outer locking button being for implementing a forced locking outside the door when the latch position sensor fails. According to the technical scheme, the inclined tongue position sensor can be used for transmitting the inclined tongue stretching position signal to the inner controller, the inner controller can judge whether the inclined tongue is locked in place according to the inclined tongue stretching position signal, and if the inclined tongue is locked in place, the motor main driver controls and drives the electric mechanism to act, so that locking is automatically completed. And when the inclined tongue position sensor fails, the outer locking button can be started, and the outer controller controls and drives the electric mechanism to act through the inner controller and the motor main driver according to a starting instruction of the outer locking button so as to implement forced locking outside the door, or directly controls and drives the electric mechanism to act through the motor standby driver when the inner circuit board fails so as to implement forced locking outside the door.

Further technical scheme can also be that be provided with interior unlocking button and interior locking button on the interior lock panel, interior unlocking button and interior locking button respectively signal connection outer controller, interior locking button is used for implementing the forced locking in the door, interior unlocking button is used for implementing the unblanking in the door. According to the technical scheme, when the inner unlocking button is started, the outer controller controls and drives the electric mechanism to unlock through the inner controller and the motor main driver according to the starting signal of the inner unlocking button, or directly controls and drives the electric mechanism to unlock through the motor standby driver when the inner circuit board breaks down. When the inner locking button is started, the outer controller controls and drives the electric mechanism to lock in an action mode through the inner controller and the motor main driver according to a starting signal of the inner locking button, or directly controls and drives the electric mechanism to lock in an action mode through the motor standby driver when the inner circuit board breaks down. That is, not only can the forced locking be realized, but also the forced unlocking can be realized in the door.

The further technical scheme may be that the lock comprises an unlocking instruction pick-up device, wherein the unlocking instruction pick-up device is arranged on the outer lock panel, the unlocking instruction pick-up device is in signal connection with the outer controller, and the unlocking instruction pick-up device is used for picking up an unlocking instruction and transmitting an unlocking instruction signal corresponding to the unlocking instruction to the outer controller for verification. The unlocking instruction pickup device can be a biological signal pickup device, a key instruction signal pickup device or a remote unlocking instruction pickup device. According to the technical scheme, when the unlocking instruction pickup device transmits the unlocking instruction signal corresponding to the unlocking instruction to the outer controller for verification, the outer controller controls and drives the electric mechanism to act for unlocking through the inner controller and the motor main driver aiming at the correct unlocking instruction signal, or directly controls and drives the electric mechanism to act for unlocking through the motor standby driver when the inner circuit board breaks down.

The further technical scheme may further include a spare sensor disposed by means of a layout space of the inner circuit board, the spare sensor is in signal connection with the outer controller, and the spare sensor is used for sensing a signal that the first shifting arm is separated from the square tongue assembly and is in a safe position, and transmitting the signal to the outer controller. The standby sensor is arranged on the inner circuit board, but has no direct signal connection relation with the power utilization element on the circuit board, and a signal received by the standby sensor is transmitted to the outer controller. When the outer controller receives the position signal of the first shifting arm at the safe position, the outer controller can select to perform the next control step, for example, control the electric mechanism to stop working, prevent the first shifting arm from rotating over the head (reaching 360 degrees) after being separated from the square tongue assembly, and then be blocked on the square tongue assembly again. The standby sensor can be an infrared sensor, a Hall effect sensor and other sensing devices.

The further technical scheme can be that the device further comprises a position display connected with the outer controller in a signal mode, wherein the position display is used for displaying a signal that the first poking arm is separated from the square tongue assembly and is in a safe position. Wherein the position display can be selectively arranged on the outer lock panel or the inner lock panel. The position display may be an indicator light, an LED display screen, or the like, capable of feeding back an indication signal to a user. Accordingly, the position signal that the first dial arm has been disengaged from the tongue assembly, as represented by the position display, may be embodied as an optical signal, a pattern symbol signal, or the like. By sensing the indication signal, a user can clearly know whether the first shifting arm is separated from the square tongue assembly, and the first shifting arm or the second shifting arm is not required to be controlled blindly, so that clear guide is provided for the effective operation of the next step.

The further technical scheme may be that the electric mechanism comprises a driving motor and a speed reducing mechanism driven by the driving motor, and the speed reducing mechanism drives the first shifting arm to rotate; the lock is characterized in that a first shifting device which is rotationally arranged is further arranged in the lock shell, the first shifting arm is arranged on the first shifting device, an output gear is arranged on an output shaft of the speed reducing mechanism, the first shifting device comprises a transmission fluted disc which can be meshed with the output gear for transmission, and the speed reducing mechanism drives the first shifting device and the first shifting arm to rotate forward and backward through meshing transmission between the output gear and the transmission fluted disc. Therefore, the first shifting device and the first shifting arm can be driven to rotate forward and backward by means of meshing transmission between the output gear and the transmission fluted disc, and the first shifting arm can be positioned by means of meshing relationship between the output gear and the transmission fluted disc after the speed reducing mechanism stops working, so that the first shifting arm is prevented from rotating at will to clamp the square tongue assembly.

The manual driving mechanism comprises a mechanical lock cylinder which is opened by a mechanical key and a door inner knob, wherein the door inner knob and the mechanical lock cylinder are arranged front and back, the second shifting arm is positioned between an output shaft of the door inner knob and an output shaft of the mechanical lock cylinder, and can extend into the lock body and can drive the square tongue component to lock or unlock when rotating; the second shifting arm is connected to the output shaft of the in-door knob and can rotate along with the output shaft of the in-door knob, and can be simultaneously connected to the output shaft of the mechanical lock cylinder and can rotate along with the output shaft of the mechanical lock cylinder after the key is inserted.

The second shifting arm is connected with the output shaft of the door inner knob, the characteristic defines that the second shifting arm is mainly positioned by means of the output shaft of the door inner knob, the second shifting arm can be directly connected with the output shaft of the door inner knob, can also be indirectly connected with the output shaft of the door inner knob, and even a clutch mechanism can be arranged between the output shaft of the door inner knob and the second shifting arm, and the transmission between the output shaft of the door inner knob and the second shifting arm is limited by the clutch mechanism.

The second shifting arm can be simultaneously connected to the output shaft of the mechanical lock cylinder and can rotate along with the output shaft of the mechanical lock cylinder after the key is inserted, the characteristic defines that the second shifting arm and the output shaft of the mechanical lock cylinder are in variable connection relation, the second shifting arm can be connected to the output shaft of the mechanical lock cylinder under the condition that the key is inserted, if the condition is not met, the second shifting arm and the output shaft of the mechanical lock cylinder are in separation relation, and at the moment, when the in-door knob is rotated, the rotation of the second shifting arm is not limited by the mechanical lock cylinder.

According to a further technical scheme, the outer controller is further used for responding to a locked-rotor signal of the electric mechanism, driving the first shifting arm to reversely rotate to the safety position through the motor main driver and the electric mechanism control, or directly driving the electric mechanism to act through the motor standby driver when the inner circuit board breaks down, and driving the first shifting arm to reversely rotate to the safety position. According to the technical scheme, when the electric mechanism is blocked, namely can not continue to rotate forwards, the first shifting arm can be driven to reversely rotate to return to the safe position without staying in place, so that the first shifting arm is prevented from being blocked by the square tongue assembly.

Drawings

FIG. 1 is an exploded view of a lock with an emergency unlocking mechanism employing the technical scheme of the present invention;

fig. 2 is a schematic diagram of an internal structure of the electric lock body 100 according to the technical scheme of the present invention, in which the square tongue is in an unlocked state;

fig. 3 is a schematic view of the internal structure of the electric lock body 100, wherein the tongue part is in a locked state, and the first striking device 6, the inner circuit board 500 and the electric mechanism 2 are omitted;

Fig. 4 is a schematic perspective view of the first striking device 6, and the first striking device 6 is provided with a first striking arm 600;

fig. 5 is a schematic perspective view of the tongue assembly 4;

FIG. 6 is a schematic diagram of an assembled configuration of the tongue assembly 4, the intermediate slider 300, and the sled 400;

FIG. 7 is an exploded structural view of the tongue assembly 4, intermediate slide 300 and sled 400;

fig. 8 is a perspective view of the click plate 9;

fig. 9 is a schematic front view of the rotating arm 8;

fig. 10 is an exploded view of the second toggle means 7;

FIG. 11 is a schematic view of the internal structure of the electric lock body 100, wherein the second shifting arm 71 and the latch plate 31 are omitted for clarity of the transmission relationship, and the latch assembly, the intermediate slider 300, the sliding member 400, etc. are omitted;

FIG. 12 is a schematic view of another connection structure between the first toggle device and the first toggle arm.

FIG. 13 is a schematic view of the transmission between the mechanical lock cylinder, the in-door knob, and the second shifting arm;

fig. 14 is a control schematic diagram of a dual control system applied to the lock.

Detailed Description

The structure of the lockset with the emergency unlocking structure and the electric lock body thereof, which are applied to the technical scheme of the invention, are further described below with reference to the accompanying drawings.

As shown in fig. 1, 2 and 3, the lock with the emergency unlocking structure comprises an inner lock panel 101 facing indoors, an outer lock panel 102 facing outdoors, and an electric lock body 100 arranged between the inner lock panel 101 and the outer lock panel 102, wherein the electric lock body 100 is generally buried in a door leaf; the electric lock body 100 comprises a lock shell 1, wherein an axially moving latch bolt assembly 3, an axially moving square bolt assembly 4 and a latch bolt reset spring 5 which can drive the latch bolt assembly 3 to automatically extend along the axial direction are contained in the lock shell 1. The oblique tongue component 3 is arranged left and right with the square tongue component 4.

The tongue component 3 comprises a tongue supporting plate 31 and a tongue slanting portion 32 which is arranged at the front end of the tongue supporting plate 31 and has an inclined surface. The lock housing 1 is provided with a second positioning shaft 14, the latch blade 31 is provided with a first long hole 311 adapted to a first rotating shaft 62 to be discussed below and a second long hole 312 adapted to the second positioning shaft 14, and the first long hole 311 and the second long hole 312 are respectively arranged along the front-rear direction so as to guide the latch blade 31 to move forward and backward along the axial direction by means of the first rotating shaft 62 and the second positioning shaft 14 respectively, thereby improving the sliding stability of the latch blade 31. The lock housing 1 includes a front housing 11, and a tongue opening (not shown) is provided in the front housing 11 to allow the tongue portion 32 to extend in the axial direction.

As shown in fig. 3 and 4, the tongue assembly 4 includes a tongue supporting plate 41 and two tongue heads (421, 422) provided at the front ends of the tongue supporting plate 41. The tongue supporting plate 41 is arranged widely in the left-right direction, and the widths of the two tongue heads 421 and 422 in the left-right direction are different, and the width of the tongue head 421 is larger than the width of the Fang Shetou part 422. In this way, the two tongue heads (421, 422) make full use of the wide space of the lock body 100 to provide a large width, wherein the tongue head 421 has a width greater than the Fang Shetou part 422, so as to greatly improve the capability of resisting violent damage to the tongue. The front housing 11 is provided with a tongue opening (not shown) through which the tongue head 42 extends in the axial direction. The two tongue heads (421, 422) are collectively referred to below as tongue heads 42.

As shown in fig. 2, 3 and 4, the lock housing 1 further includes a first toggle device 6 rotatably disposed therein, the first toggle arm 600 disposed on the first toggle device 6, and an electric mechanism 2 for driving the first toggle arm 600 to rotate. The electric mechanism 2 includes a driving motor 21 and a speed reduction mechanism 22 driven by the driving motor 21. The first shifting device 6 comprises a first rotating shaft 62 and a transmission fluted disc 63 arranged at the top end of the first rotating shaft 62, and the first shifting device 6 is rotatably arranged in the lock housing 1 through the first rotating shaft 62. The first shifting arm 600 is simultaneously connected to the first rotating shaft 62 and the driving gear disc 63 and rotates synchronously with the driving gear disc 63. Of course, in other embodiments, it is also possible for the first shifting arm 600 to be provided only on the first rotary shaft 62 or on the transmission toothed disk 63. The first shifting arm 600 drives the square tongue assembly 4 to be locked and unlocked normally in a shifting manner and is separated from the square tongue assembly 4 after the locking and unlocking are completed, and the first shifting arm 600 can also retract the inclined tongue assembly 3. The output shaft of the speed reducing mechanism 22 is provided with an output gear 23 capable of being meshed with the transmission fluted disc 63 for transmission, the electric mechanism 2 drives the first poking device 6 and the first poking arm 600 to rotate forward and backward through the meshing transmission between the output gear 23 and the transmission fluted disc 63, and in addition, the first poking arm 600 can be positioned by means of the meshing relationship between the output gear 23 and the transmission fluted disc 63 after the speed reducing mechanism 22 stops working, so that the first poking arm 600 is prevented from rotating randomly to influence the operation of other components.

As shown in fig. 5, 6, 7 and 11, the tongue supporting plate 41 is provided with a first recess 43 for enabling the first pulling arm 600 to be screwed in and combined with the first pulling arm 600, and when the first pulling arm 600 is screwed in the first recess 43 and rotated in a clockwise or counterclockwise direction, the tongue supporting plate 41 can be pulled to move forward or backward in an axial direction. A sliding member 400 and a sliding member return spring 54 capable of driving the sliding member 400 to automatically return forward in the axial direction are provided below the square tongue supporting plate 41. The lower side wall of the square tongue supporting plate 41 is provided with first spring positioning columns 411, sliding part guide columns (412 and 413) which are arranged at intervals, the sliding part 400 is provided with sliding part connecting arms 403 and guide grooves (404 and 405) which are matched with the sliding part guide columns (412 and 413), one end of a sliding part return spring 54 is connected with the first spring positioning columns 411, the other end of the sliding part return spring is connected with the sliding part connecting arms 403, and the sliding part 400 is sleeved on the sliding part guide columns (412 and 413) in a penetrating mode through the guide grooves (404 and 405), so that the sliding part is arranged on the square tongue supporting plate 41 in a sliding mode. The blade 41 can move axially back and forth with the slider 400 and slider return spring 54 as it moves axially back and forth. In this way, the sliding member 400, the sliding member return spring 54 and the tongue supporting plate 41 are in a vertically stacked relationship, so that the occupation of the installation space can be reduced. Second, when the tongue supporting plate 41 moves forward and backward along the axial direction with the sliding member 400, the tongue supporting plate 41 does not need to overcome the elastic resistance of the sliding member return spring 54, so that the energy consumption of the electric mechanism 2 can be reduced. An auxiliary recess 406 is further provided on the sliding member 400, which enables the first shifting arm 600 to be screwed in and is used for combining the first shifting arm 600, and the auxiliary recess 406 is positioned in front of the first recess 43. The sliding part 400 is further provided with a sliding part poking arm 401 for poking the inclined tongue supporting plate 31, the inclined tongue supporting plate 31 is provided with a poking combining part 315 for combining the sliding part poking arm 401, and a front avoidance space 316 for avoiding the sliding part poking arm 401 to move forwards and backwards along the axial direction is reserved in front of the poking combining part 315. Of course, in other embodiments, the sliding member 400 and the sliding member return spring 54 may also be disposed on the lock housing 11, where the sliding member 400 is moved in the backward direction against the elastic resistance of the sliding member return spring 54 when the tongue supporting plate 41 is moved in the backward direction, and the sliding member 400 is automatically reset in the forward direction along the axial direction under the driving of the sliding member return spring 54 when the tongue supporting plate 41 is moved in the forward direction.

As shown in fig. 2, 3 and 8, a latch plate 9 and a latch plate return spring 52 capable of driving the latch plate 9 to automatically return are further disposed in the lock housing 1, the latch plate 9 and the square tongue supporting plate 41 are arranged up and down, an axial locking device is disposed between the latch plate 9 and the square tongue supporting plate 41, and the latch plate 9 is matched with the axial locking device to axially lock the square tongue supporting plate 41. The axial locking means comprise a projection 47 provided on the blade carrier 41 and facing the detent plate 9, and a third recess 92 provided on the detent plate 9, which fits into the projection 47. In the present embodiment, the number of the third recesses 92 is 3, the number of the first recesses 43 is 2, the number of the third recesses 92 is greater than the number of the first recesses 43 and the stride length of the third recesses 92 in the front-rear direction is substantially the same as the stride length of the first recesses 43. Of course, in other embodiments, the projections 47 and the third recesses 92 may be interchanged, i.e. a projection 47 facing the tongue plate 41 is provided on the detent plate 9 and a third recess 92 adapted to the projection 47 is provided on the detent plate 9. The detent plate 9 further comprises a side 94 extending into the first recess 43, wherein the front projection of the side 94 overlaps the front projection of the first recess 43 when seen in a front view. When the first shifting arm 600 is screwed into the first recess 43, the first shifting arm 600 can be combined to the one side edge 94 and push the clamping plate 9 to move, so that the axial locking device is disabled, the axial locking of the square tongue supporting plate 41 is released, the square tongue supporting plate 41 can move back and forth along the axial direction, and when the first shifting arm 600 leaves the first recess 43, the clamping plate reset spring 52 can drive the clamping plate 9 to reset and axially lock the square tongue supporting plate 41 so that the square tongue supporting plate 41 cannot move back and forth along the axial direction.

As shown in fig. 3, 5 and 9, a vertical surface 49 facing to the rear is further provided on the tongue assembly 4, and a rotating arm 8 and a rotating arm return spring 51 capable of pushing the rotating arm 8 to rotate out for return are further rotatably provided in the lock housing 1. The rotating arm 8 is provided with a shaft hole 83 and an avoidance hole 84 for avoiding the protrusion 47, and the left edge of the rotating arm 8 is provided with a connecting protrusion 82. A rotation shaft 12 is provided to the lock housing 1, and the rotation arm 8 is rotatably provided to the rotation shaft 12 through a shaft hole 83. One end of the rotating arm return spring 51 is sleeved on the connecting protrusion 82, and the other end is propped against the left vertical side wall of the lock housing 1. When the pivoting arm 8 is pivoted out of the way, its tip 81 can bear against the elevation 49, so that the axial moment of the tongue assembly 4 pressed back axially can be increased in cooperation with the axial locking device. The clamping plate 9 is further provided with a pushing arm 91 capable of pushing the top end of the rotating arm 8 to leave the vertical face 49, and a joint point A between the pushing arm 91 and the rotating arm 8 is located between the rotating shaft 12 of the rotating arm 8 and the top end 81 of the rotating arm 8. When the detent plate 9 is pushed to disable the axial locking means to release the axial locking of the tongue supporting plate 41, the detent plate 9 simultaneously pushes the top end of the rotating arm 8 away from the elevation 49 by the pushing arm 91 to facilitate the retraction of the tongue assembly 4.

According to the above technical solution, as shown in fig. 2 and 3, in a state where the tongue head 42 and the tongue head 32 are protruded out of the lock case 1, the rotating arm 8 is rotated out to be reset by the rotating arm reset spring 51, and the tip 81 thereof is abutted against the elevation 49. The latch plate 9 is reset under the action of the latch plate reset spring 52, and the axial locking device axially locks the square tongue supporting plate 41 from moving back and forth along the axial direction. The lock body 100 is now in the locked state. When unlocking is needed, the electric mechanism 2 drives the first shifting arm 600 to screw into the first recess 43 and rotate continuously in the anticlockwise direction, the clamping plate 9 is pushed by the first shifting arm 600 to disable the axial locking device and release the axial locking of the square tongue supporting plate 41, meanwhile, the pushing arm 91 pushes the top end 81 of the rotating arm 8 to leave the elevation 49, the first shifting arm 600 pushes the square tongue supporting plate 41 to move backwards and retract the square tongue head 42 into the lock housing 1, at this time, the sliding element 400 and the auxiliary recess 406 thereof also move backwards along with the square tongue supporting plate 41 into position, and the sliding element shifting arm 401 can be combined with (or basically approach) the stirring combining part 315, and when the first shifting arm 600 rotates continuously in the anticlockwise direction and rotates continuously in the anticlockwise direction, the first shifting arm 600 can not only push the clamping plate 9 (at this time, the sliding element 400 can not be pushed by the sliding element 400 again) and can continue to move back into the sliding element 32 after the sliding element 400 is combined with the sliding element 400. When the latch supporting plate 31 moves backward in place, the electric mechanism 2 drives the first shifting arm 600 to rotate clockwise and separate from the auxiliary recess 406, the sliding piece 400 and the latch assembly 3 are released, the sliding piece 400 is reset forward under the driving of the sliding piece reset spring 54, the latch assembly 3 is reset forward under the driving of the latch reset spring 5, and the latch tongue portion 32 axially extends out of the front housing 11 from the latch tongue opening. Meanwhile, the latch plate return spring 52 can drive the latch plate 9 to automatically return to axially lock the square tongue supporting plate 41 from moving forwards and backwards along the axial direction.

If the tongue head 42 needs to be locked again on the basis of the above, the electric mechanism 2 drives the first shifting arm 600 to screw into the first recess 43 and rotate continuously in the clockwise direction, the clamping plate 9 can be pushed by the first shifting arm 600 to move and unlock the axial locking of the tongue supporting plate 41, the first shifting arm 600 rotates continuously in the clockwise direction to shift the tongue supporting plate 41 to move forwards, the tongue head 42 extends out of the lock housing 1 from the tongue opening part along the axial direction, and at the moment, the sliding piece 400 moves forwards along with the tongue supporting plate 41 and the sliding piece shifting arm 401 moves freely in the front avoidance space 316. After which the first shifter arm 600 continues to rotate clockwise away from the first recess 43. The latch plate return spring 52 drives the latch plate 9 to automatically return and axially lock the square tongue supporting plate 41 from moving forward and backward along the axial direction. The pivoting arm 8 is pivoted out of the way and its top end 81 again rests against the elevation 49.

Further, the first recess 43 includes two first sub-recesses arranged in the front-rear direction43a、 43b) The two first sub-recesses 43a、43b) Separated by a projecting tooth 44, the projecting tooth 44 being provided on the blade 41. The auxiliary recess 406 is separated from the first front sub-recess 43b by a further projecting tooth 402, which further projecting tooth 402 is provided on the slide 400. In this way, the first dial 600 rotated by two weeks may be coupled to the two in successionFirst sub-dent43a、43b) The second-stage axial movement is performed by pulling up the square bolt supporting plate 41, so that the axial extension length of the square bolt head 42 can be increased, and the anti-picking performance of the lock body is improved.

As shown in fig. 3, 5 and 10, intermediate recesses (90, 48) are provided in the detent plate 9 and the tongue support 41, respectively, and the second toggle device 7 is provided in the intermediate recesses (90, 48). The second shifting device 7 is arranged at a left-right interval with the first shifting device 6, the second shifting device 7 comprises a second shifting arm 71 capable of rotating forward and backward, the second shifting arm 71 can extend into the lock body 100 and drive the square tongue assembly 4 to lock and unlock in a shifting manner when the second shifting arm 71 rotates, and can be separated from the square tongue assembly 4 after the locking and unlocking are completed, and the second shifting arm 71 can also retract the oblique tongue assembly 3. The second recess 46 for screwing the second pulling arm 71 into and combining the second pulling arm 71 is provided on the square tongue supporting plate 41, and the positioning plate 9 further includes another side 95 extending to the second recess 46, and the orthographic projection of the other side 95 overlaps with the orthographic projection of the second recess 46 when seen in a front view. When the second pulling arm 71 is screwed into the second recess 46, the second pulling arm 71 can be combined to the other side edge 95 and push the clamping plate 9 to move, so that the axial locking device is disabled, the axial locking of the square tongue supporting plate 41 is released, and the square tongue supporting plate 41 can be further pulled to move forwards or backwards, and when the second pulling arm 71 leaves the second recess 46, the clamping plate return spring 52 can drive the clamping plate 9 to automatically reset and axially lock the square tongue supporting plate 41 so as not to move forwards or backwards along the axial direction.

As shown in fig. 10 and 13, the second striking device 7 further comprises a manual driving mechanism for driving the second striking arm 71 to rotate, the manual driving mechanism comprising a mechanical lock cylinder 23 (in industry definition, the lock cylinder is also referred to as a lock head) opened by a mechanical key and an in-door knob 73. The manual driving mechanism is a separate functional module that can be detached from the lock body 100, and in a specific application scenario, the manual driving mechanism needs to be combined to the lock body to enable the second shifting arm 71 to extend into the lock body 100. The in-door knob 73 is disposed in front of and behind the mechanical lock cylinder 23, and the second dial arm 71 is located between an output shaft 730 of the in-door knob 73 and an output shaft 720 of the mechanical lock cylinder 23. The second shifting arm 71 is connected to the output shaft 730 of the in-door knob 73 and can rotate along with the output shaft 730 of the in-door knob 73, and when the second shifting arm 71 rotates, the second shifting arm 71 can drive the square tongue assembly 4 to lock or unlock. The second dial arm 71 is provided with a dial arm connection hole 710 capable of receiving an output shaft 720 of the mechanical lock cylinder 23. The output shaft 720 of the mechanical lock cylinder 23 is inserted into the arm connecting hole 710 in a radial linkage relationship with the second arm 71 after the key is inserted, so that the second arm 71 is simultaneously connected to the output shaft 720 of the mechanical lock cylinder 23 and can rotate with the output shaft 720 of the mechanical lock cylinder 23. According to the above technical solution, the second shifting arm 71 is in a connection relationship with the output shaft 720 of the mechanical lock cylinder 23, so that the second shifting arm 71 can be simultaneously connected to the output shaft 720 of the mechanical lock cylinder 23 and the output shaft 730 of the in-door knob 73 under the condition of inserting a key, and the second shifting arm 71 and the in-door knob 73 can be driven to rotate by turning the key; otherwise, the second shifting arm 71 is in a separation relationship with the output shaft 720 of the mechanical lock cylinder 23, and when the in-door knob 73 is rotated, the second shifting arm 71 rotates along with the output shaft 730 of the in-door knob 73, and is not limited by the rotation of the mechanical lock cylinder 23. When the electric mechanism 2 fails or has insufficient power, the second shifting device 7 can be used as a standby device to replace the first shifting arm 600 to complete the locking and unlocking operation. Of course in other embodiments, if the in-door knob 73 is not provided, the second dial arm 71 may be coupled to the output shaft 720 of the mechanical lock cylinder 23 and may be rotatable with the output shaft 720 of the mechanical lock cylinder 23.

As shown in fig. 7 and 11, the lock body 100 further includes an intermediate slider 300 slidably provided on the blade holder 41 and a slider return spring 53 capable of driving the intermediate slider 300 to automatically return. Second spring locator posts 414 and intermediate slider guide posts (415, 416) are provided on the lower side wall of the tongue blade 41 in spaced apart relation to one another. The intermediate slide 300 comprises a hook arm 301 for engaging the second pulling arm 71, an engaging projection 302 for engaging the slide return spring 53, and guide grooves (303, 304) provided to fit the intermediate slide guide posts (415, 416). The middle sliding piece 300 is sleeved on the middle sliding piece guide posts (415, 416) through the guide grooves (303, 304), one end of the sliding piece return spring 53 is connected to the combining convex post 302, and the other end is connected to the second spring positioning post 414. A lever member 200 and a rotating shaft 15 are also provided in the lock housing 1, and the lever member 200 is rotatably provided on the rotating shaft 15. The tail end 202 of the lever member 200 extends to the tongue supporting plate 31 and can be abutted against the tongue supporting plate 31, and the front end of the lever member 200 is provided with an upright portion 201 capable of engaging with the intermediate slider 300, the upright portion 201 avoiding the axial forward-backward movement path of the intermediate slider 300. When the side tongue supporting plate 41 is extended and moved forward with the middle sliding member 300 along the axial direction, the front end of the lever member 200 and the standing part 201 can avoid the side tongue supporting plate 41 and the middle sliding member 300, when the hook arm 301 of the middle sliding member 300 is positioned in the rotation range of the second pulling arm 71 and rotates the second pulling arm 71 after the side tongue supporting plate 41 is moved backward with the middle sliding member 300, the second pulling arm 71 pulls the hook arm 301 to pull and slide the middle sliding member 300, the sliding middle sliding member 300 can be combined with the standing part 201 and can drive the lever member 200 to rotate through the standing part 201, and the rotating lever member 200 can push the inclined tongue supporting plate 31 to move backward and retract the inclined tongue head 32 into the lock housing 1.

According to the above technical solution, as shown in fig. 2, the tongue head 42 is in an unlocked state. When the second pulling arm 71 is rotated clockwise to screw into the second recess 46, the second pulling arm 71 can be coupled to the other side edge 95 and push the detent plate 9 to move, so that the axial locking device is disabled, thereby releasing the axial locking of the square tongue supporting plate 41 and pulling the square tongue supporting plate 41 to move forward to push the square tongue head 42 to extend out of the lock housing 1, and at the same time, the square tongue supporting plate 41 moves forward with the intermediate sliding member 300. The latch plate return spring 52 can drive the latch plate 9 to automatically return to axially lock the tongue supporting plate 41 from moving axially back and forth when the second pulling arm 71 leaves the second recess 46.

As shown in FIG. 3, the tongue head 42 and the beveled tongue portion 32 are in a locked state. When the second pulling arm 71 rotates counterclockwise to screw into the second recess 46, the second pulling arm 71 is combined to the other side edge 95 again and pushes the detent plate 9 to move, so that the axial locking device is disabled, and meanwhile, the pushing arm 91 pushes the top end 81 of the rotating arm 8 to leave the vertical surface 49, so that the axial locking of the square tongue supporting plate 41 is released, and the square tongue supporting plate 41 is pushed to move backwards to drag the square tongue head 42 to be retracted into the lock housing 1. At the same time, the square tongue supporting plate 41 moves backward with the middle sliding member 300, when the hook arm 301 of the middle sliding member 300 is located in the rotation range of the second pulling arm 71 and rotates the second pulling arm 71 after the middle sliding member 300 moves backward, the second pulling arm 71 pulls the hook arm 301 to enable the middle sliding member 300 to slide in a pulling way, the sliding middle sliding member 300 is combined with the standing part 201 and drives the lever member 200 to rotate through the standing part 201, and the rotating lever member 200 pushes the inclined tongue supporting plate 31 to move backward so as to retract the inclined tongue head 32 into the lock housing 1. When the second pulling arm 71 leaves the second recess 46 to pull the hook arm 301, the latch plate return spring 52 can drive the latch plate 9 to automatically return to axially lock the square tongue supporting plate 41 from moving forward and backward along the axial direction. When the second pulling arm 71 is rotated to leave the hook arm 301, the intermediate slider 300 is automatically reset under the drive of the slider return spring 53, and the latch supporting plate 31 is reset under the action of the latch return spring 5 to extend the latch tongue portion 32 out of the lock housing 1 again.

Further, the second recess 46 includes two second sub-recesses (46 a, 46 b) arranged in the front-rear direction, the two second sub-recesses (46 a, 46 b) being separated by one protruding tooth 45, the one protruding tooth 45 being provided on the tongue supporting plate 41. In this way, the second pulling arm 71 rotated for two weeks can be combined to the two second sub-recesses (46 a, 46 b) in sequence to pull the square bolt supporting plate 41 for secondary movement, so that the extension length of the square bolt head 42 can be increased, and the anti-picking performance of the lock body can be improved.

According to the above technical solution, the lock body 100 is provided with both the electric mechanism 2 and the manual driving mechanism, if the first pulling arm 600 stays in the first recess 43 after locking or unlocking is completed, it is basically difficult to reversely drive the first pulling arm 600 to automatically leave the first recess 43 through the movement of the tongue assembly 4, that is, the first pulling arm 600 will be blocked on the first recess 43 and further limit the tongue assembly 4 from moving, and at this time, the spare manual driving mechanism is started and rotated to drive the tongue assembly 4, so that unlocking is also difficult to be driven and realized. How to coordinate the electric driving part and the manual driving part, so that the locking and unlocking can be realized through the manual driving part at any time becomes the technical problem which needs to be further solved by the invention. For this purpose, the electric mechanism 2 drives the first shifting arm 600 to further drive the first shifting arm 600 to disengage from the tongue assembly 4 and allow the first shifting arm 600 to stay at a safe position (an area between the first main sensor 501 and the second main sensor 502 in fig. 2), the first shifting arm 600 stays at the safe position to allow the first shifting arm 600 to avoid the tongue assembly 4 at this time, and the manual driving mechanism is used for driving the tongue assembly 4 to move to lock or unlock by the second shifting arm 71 with the first shifting arm 600 staying at the safe position. Therefore, the electric mechanism 2 not only can drive the first shifting arm 600 to complete locking or unlocking, but also can further drive the first shifting arm 600 to be separated from the square tongue assembly 4 and stay in a safe position, so that preparation conditions are provided for the second shifting arm 71 to drive the square tongue assembly 4 to move at any time. The first shifting arm 600 in the safety position is not only completely separated from (not contacting with) the tongue assembly 4, but also leaves the moving path of the tongue assembly 4, at this time, the first shifting arm 600 does not become an obstacle for the movement of the tongue assembly 4, and the tongue assembly 4 can smoothly move to complete locking or unlocking under the driving of the second shifting arm 71.

As shown in fig. 2, 3 and 13, in order to accurately rest the first toggle arm 600 at a safety position, an inner circuit board 500 is further provided in the lock housing 1, the inner circuit board 500 being disposed vertically with the tongue supporting plate 31 and a part of the inner circuit board 500 being disposed vertically correspondingly with the transmission toothed disc 63. An internal controller 5010 and a motor main driver 509 connected to the internal controller 5010 by signals are provided on the internal circuit board 500, and the motor main driver 509 controls driving of the electric mechanism 2. Be provided with fluted disc response trigger body 61 on the transmission fluted disc 63, with transmission fluted disc 63 upper and lower correspondence arranges be provided with the response receiver on the inner circuit board 500, the response receiver includes along the fluted disc response trigger body 61's travel path arranges first main sensor 501 and second main sensor 502 around, first main sensor 501 and second main sensor 502 can receive respectively the response signal that fluted disc response trigger body 61 passed and send the inner controller 5010. The inner controller 5010 is configured to determine that the first toggle arm 600 is locked or unlocked and rotates away from the first recess 43 according to the signal fed back by the first main sensor 501, and determine the rotation direction of the first toggle arm 600 and the number of passes in the same rotation direction according to the sequence of the signals fed back by the first main sensor 501 and the second main sensor 502.

A standard logic model is preset in the inner controller 5010, where the standard logic model includes receiving the signal fed back by the first main sensor 501 first and then receiving the signal fed back by the second main sensor 502, and then recognizing that the first dial 600 rotates clockwise once; the logic information of the first dial 600 rotating counterclockwise once is determined by receiving the feedback signal from the second main sensor 502 and then receiving the feedback signal from the first main sensor 501. According to the standard logic model, the inner controller 5010 determines the rotation direction of the first dial 600 and the number of passes in the same rotation direction according to the sequence of signals fed back by the first main sensor 501 and the second main sensor 502 obtained in practice. In this way, the inner controller 5010 can more precisely control the operation of the first toggle arm 600 by the electric mechanism 2 and can better control the time when the electric mechanism 2 stops operating so that the first toggle arm 600 stays in the safe position (the area between the first main sensor 501 and the second main sensor 502).

A third sensor 508 is further disposed on the inner circuit board 500, and the third sensor 508 is in signal connection with the inner controller 5010. A third signal post 203 is further disposed at the tail end 202 of the lever member 200, and the third signal post 203 is disposed vertically corresponding to the third sensor 508 when the intermediate slider 300 is in a reset state and does not drive the lever member 200 to rotate. When the second shifting arm 71 is rotated by the lever member 200 to push the latch supporting plate 31 to move backward to retract the latch head 32 into the lock housing 1, the third signal post 203 is separated from the third sensor 508, and at this time, the third sensor 508 sends a movement signal of the third signal post 203 to the internal controller 5010, and the internal controller 5010 records the number of movements of the second shifting arm 71, so that the user can know the usage of the manual driving mechanism.

However, it cannot be ignored that when the inner circuit board 500 fails and the electric mechanism 2 suddenly stops operating during operation, the first pulling arm 600 is stuck on the first recess 43, and the unlocking or locking cannot be realized by the manual driving mechanism. In view of this, as shown in fig. 13, an external circuit board 800 is further provided on the external lock panel 102. Of course, in other embodiments, the outer circuit board 800 may also be disposed on the inner lock panel 101. The external circuit board 800 is provided with an external controller 801 and a motor standby driver 802 in signal connection with the external controller 801, the motor standby driver 802 also controls and drives the electric mechanism 2, and the internal controller 5010 is in signal connection with the external controller 801; the outer lock panel 102 is provided with an outer lock button 105, and the outer lock button 105 is in signal connection with the outer controller 801. The outer locking button 105 is used for controlling and driving the electric mechanism 2 to act through the inner controller 5010 and the motor main driver 509 according to the starting instruction of the outer locking button 105 when the outer locking button 105 is started, or directly controlling and driving the electric mechanism 2 to act through the motor standby driver 802 when the inner circuit board 500 breaks down, so as to implement the forced locking outside the door.

Wherein the outer circuit board 800 and the inner circuit board 500 are mechanically and physically independent from each other, but signals acquired by them can be transferred through the inner controller 5010 and the outer controller 801. The external controller 801 may send an unlocking command or a locking command to the internal controller 5010, and after the internal controller 5010 receives the unlocking command or the locking command of the external controller 801, the external controller 801 may complete unlocking or locking by driving the tongue component 42 through the motor main driver 509 and the electric mechanism 2, and may feed back an unlocking completion signal or a locking completion signal to the external controller 801. Next, the external controller 801 and the motor backup driver 802 may independently drive the electric mechanism 2 to operate when the internal circuit board 500 fails, using the external circuit board 800 as a layout carrier.

The motor main driver 509 mainly controls and drives the electric mechanism 2 to normally operate under a normal operating condition, so as to realize normal unlocking and locking operations. The motor spare driver 802 mainly has abnormal operation, for example, if the motor main driver 509 or the internal controller 5010 fails to control the operation of the electric mechanism 2, the motor spare driver 802 can replace the motor main driver 509 to control and drive the electric mechanism 2.

According to the above technical solution, after the external locking button 105 is activated, the forced locking can be completed through two control loops:

first, the main control circuit, the outer lock button 105 is used for controlling and driving the electric mechanism 2 to act through the inner controller 5010 and the motor main driver 509 according to the starting instruction of the outer lock button 105 when the outer lock button 105 is started, so as to implement forced locking outside the door. This scheme belongs to a control loop that is preferably selected when the outer locking button 105 is activated, and is generally applied to a manual forced intervention scheme in which the inner controller 5010 and the motor main driver 509 are still in a normal operating state, so that in this control loop, the inner controller 5010 and the motor main driver 509 can still participate in the operation to control and drive the electric mechanism 2 to act to implement a forced locking outside the door, and the first toggle arm 600 can be separated from the tongue component 4 to stay in the safe position, and then unlocking can also be implemented by the manual driving mechanism.

Second, in the standby control loop, when the inner circuit board 500 fails, the outer controller 801 directly controls and drives the electric mechanism 2 to act through the motor standby driver 802, so as to implement forced locking outside the door. This solution belongs to a standby control loop that automatically switches when the outer lock button 105 is activated in case of a failure of the inner circuit board 500. In this case, the motor main driver 509 cannot control the operation of the electric mechanism 2, and therefore the motor spare driver 802 replaces the motor main driver 509 to control the operation of the electric mechanism 2. In practical applications, the damage of the inner circuit board 500 may cause the latch support plate 41 and the first shifting arm 600 to be still combined and in a clamping position, and the motor standby driver 802 is started to drive the electric mechanism 2 to act so as to drive the first shifting arm 600 to rotate in the locking direction, and the first shifting arm 600 can be driven to be separated from the latch support plate 41 and stay in a safe position, at the moment, the obstacle of the movement of the latch assembly 4 is cleared, the manual driving mechanism can be used for driving the second shifting arm 71 to drive the latch assembly 4 to move for unlocking, and of course, locking can also be realized, however, at the moment, the latch assembly 4 is in a locked state, and locking by the manual driving mechanism is not needed. The manual driving mechanism can be safely used for entering a room after unlocking, and the lockset is convenient to disassemble and maintain from the inside of the door, so that destructive door opening is not needed to be implemented outside the door. The main problem to be solved by providing the backup control loop is how to effectively solve the unlocking problem when the inner circuit board 500 is damaged, and the solution is designed mainly around the problem. Of course, if the inner circuit board 500 is damaged, the tongue component 4 is not clamped with the first shifting arm 600, and the first shifting arm 600 is already in the safe position, and the manual driving mechanism is directly used to unlock and lock.

The outer locking button 105 and the motor spare driver 802 are not generally started at will in normal unlocking and locking use, but are a spare control loop capable of driving the electric mechanism 2 to act, and the outer locking button is completely possibly used by a bad person for unlocking; for this reason, whether the motor spare drive 802 or the motor main drive 509 is activated by the outer lock button 105, the latch assembly 4 can be locked without unlocking, and thus the unlocking effect of the outer lock button 105 on the motor spare drive 802 and the motor main drive 509 can be avoided.

According to the above technical solution, not only is the electric mechanism 2 opened in standby by the outer locking button 105 and the motor standby driver 802 realized, but the standby circuit cannot be a bad person to implement a path opposite to the dangerous behavior so as to strengthen the locking safety; the first shifting arm 600 can be separated from the square tongue assembly 4 by using the standby loop, so that convenience is provided for unlocking by adopting a standby manual driving mechanism, namely, the standby loop can only lock the lock instead of unlocking the lock, and unlocking obstacles are cleared for other mechanical standby unlocking means.

Further, the outer controller 801 is further configured to control the first dial arm 600 to rotate reversely through the motor main driver 509 and the electric mechanism 2 in response to a locked rotation signal of the electric mechanism 2, or directly control the electric mechanism 2 to rotate reversely through the motor standby driver 802 to drive the first dial arm 600 to rotate reversely to the safe position when the inner circuit board 500 fails. According to the above technical solution, when the electric mechanism 2 is locked, that is, cannot continue to rotate forward, the first shifting arm 600 can be driven to rotate reversely to return to the safe position without staying in place, so as to avoid the first shifting arm 600 from blocking the square tongue assembly 4.

Further, a spare sensor 803 is provided by means of the layout space of the inner circuit board 500, the spare sensor 803 is in signal connection with the outer controller 801, and the spare sensor 803 is used for sensing a signal that the first shifting arm 600 has been separated from the tongue assembly 4 and is in a safety position, and transmitting the signal to the outer controller 801. The spare sensor 803 is disposed on the inner circuit board 500, but is not substantially in direct signal connection with the electrical components on the circuit board, and the signal received by the spare sensor 803 is transmitted to the outer controller 801. When the first and second main sensors 501 and 502 fail to transmit signals to the inner controller 5010, the inner controller 5010 will feed back an activation signal to the outer controller 801 to activate the standby sensor 803. Thereafter, the standby sensor 803 senses that the first dial arm 600 is separated from the signal of the square tongue assembly 4 in the safety position and transmits the signal to the outer controller 801, and the outer controller 801 controls the electric mechanism 2 to stop working through the inner controller 5010, the motor main driver 509 or the motor standby driver 802, so as to prevent the first dial arm 600 from being blocked on the square tongue assembly 4 again after continuing to rotate the head (reaching 360 °) after being separated. The backup sensor 803 may be an infrared sensor, a hall effect sensor, or the like.

Further, a position display is also included in signal connection with the outer controller 801, the position display being configured to display a signal that the first dial arm 600 has been disengaged from the tongue assembly 4 in a safe position. Wherein the position display may optionally be provided on the outer lock panel 102 or the inner lock panel 101. The position display may be an indicator light, an LED display screen, or the like, capable of feeding back an indication signal to a user. Accordingly, the position signal that the first dial arm 600 has been disengaged from the tongue assembly 4, as represented by the position display, may be embodied as an optical signal, a pattern symbol signal, or the like. By sensing the indication signal, the user can clearly know whether the first arm 600 has been separated from the tongue assembly 4, without blindly manipulating the first arm 600 or the second arm 71 to act, so as to provide clear guidance for the next effective operation.

In addition, in order to prevent the first pulling arm from being jammed in the first recess 43 to affect the locking and unlocking operation of the second pulling arm 71, the following two schemes may be adopted:

first, by changing the connection structure between the first shifting device and the first shifting arm, see the embodiment shown in fig. 12, the first shifting device 6a includes a first rotating shaft 62a and a transmission fluted disc 63a, and the transmission fluted disc 63a is disposed at the top end of the first rotating shaft 62 a. A clutch device 700 is further arranged in the lock housing, and the clutch device 700 comprises an inner clutch block 701, an outer clutch block 702, a clutch pin 703 capable of controlling the engagement or disengagement of the inner clutch block (701) and the outer clutch block (702), and a clutch pin return spring 704 penetrating the clutch pin 703. In this aspect, the first shifting arm 600a is not connected to the first rotating shaft 62a and the driving gear disc 63a but is connected to the outer clutch block 702. The first rotating shaft 62a is radially linked with the inner clutch block 701. The first shift arm 600a is thus coupled to the first rotary shaft 62a via the clutch 700. An electromagnet 705 is also provided below the clutch 700. In the power-off state of the electromagnet 705, the clutch pin 703 is inserted into the inner and outer clutch blocks (701, 702) from bottom to top under the elastic pressing action of the clutch pin return spring 704, at this time, the electric mechanism 2 can drive the first rotating shaft 62a to rotate forward and backward through the meshing transmission between the output gear 23 and the transmission fluted disc 63a, and the first rotating shaft 62a drives the first shifting arm 600a to rotate forward and backward through the inner and outer clutch blocks (701, 702) which are engaged together. When the first pulling arm 600a is jammed on the first recess 43, a power is supplied to the electromagnet 705, and the electromagnet 705 generates a magnetic field to magnetically attract the clutch pin 703 to move downward away from the inner clutch block 701 and fully retract onto the outer clutch block 702. When the clutch 700 is in the disengaged state, the transmission chain between the electric mechanism 2 and the first shifting arm 600a is disconnected, the power of the electric mechanism 2 cannot be transmitted to the first shifting arm 600a through the transmission fluted disc 63a and the first rotating shaft 62a, and meanwhile, the electric mechanism a loses the restriction on the rotation of the first shifting arm 600a, at this time, the second shifting arm 71 can drive the movement of the square tongue supporting plate 41, and the first shifting arm 600a is reversely driven to leave the first recess 43 in the moving process of the square tongue supporting plate 41.

Second, as shown in fig. 2 and 3, temporary manual knob coupling parts (621, 622) are respectively provided at the bottom ends of the transmission fluted disc 63 and the first rotating shaft 62, the temporary manual knob coupling parts (621, 622) can be coupled with a manual knob (not emitted in the drawing) to manually rotate the first toggle device, and control windows (16, 16 a) exposing the temporary manual knob coupling parts (621, 622) are respectively provided at the upper and lower cases of the lock case 1. Thus, when the inner circuit board 500 and the outer circuit board 800 are simultaneously failed or the first pulling arm 71 is blocked on the square tongue assembly 4 and cannot be removed due to the abnormal conditions such as failure of the electric mechanism 2, the driving force can be applied to the transmission fluted disc 63 or the first rotating shaft 62 through the control window (16 or 16 a) by the manual knob and combined to the temporary manual knob combining part (621 or 622) so as to control the first pulling arm 600 to rotate, thereby completing manual unlocking or completing unlocking through the second pulling arm 71 after the first pulling arm 600 rotates to leave the square tongue assembly 4. Of course, in other embodiments, the temporary manual knob coupling may be provided on only one of the driving toothed disc 63 or the first rotary shaft 62.

As shown in fig. 2 and 13, in order to automatically complete locking under the condition that the locking is confirmed, a first signal post 313 and a second signal post 314 for indicating the moving position of the tongue portion 32 are provided on the tongue supporting plate 41, and the first signal post 313 and the second signal post 314 are arranged at a left-right interval. During movement of the signal posts (313, 314), the signal posts (313, 314) respectively form a first position that characterizes extension of the tongue head 32 into position and a second position that characterizes retraction of the tongue head 32 into position. And further comprises a first tongue position sensor 505 arranged corresponding to the first position of the first signal post 313 and a second tongue position sensor 507 arranged corresponding to the second position of the second signal post 314, wherein the first tongue position sensor 505 and the second tongue position sensor 507 are respectively used for receiving the position signals passed by the signal posts (313 and 314) and respectively transmitting the signals corresponding to the position signals to the internal controller 5010. When the internal controller 5010 first receives a sequence of latch retraction signals transmitted in sequence by the first and second latch position sensors 505, 507 to indicate that the latch portion 32 is retracted from outside the lock housing 1 into the lock housing 1, and then receives a sequence of latch extension signals transmitted in sequence by the second and first latch position sensors 507, 505 to indicate that the latch portion 32 is extended from inside the lock housing 1 to outside the lock housing 1, then determines that the latch head 32 is locked in place.

The electric lock body 100 is further provided with a door position sensor 504 for detecting a door position, the door position sensor 504 is a hall effect sensor, the door position sensor 504 is in signal connection with the internal controller 5010, and the door position sensor 504 is disposed inside the front housing 11. Of course, in other embodiments, mounting holes may be provided in the front housing 11, and the door position sensor 504 may be mounted in the mounting holes. When the door is in the closed position, the door position sensor 504 will receive the trigger signal of the inductive trigger 900 on the door frame and send a door position signal to the internal controller 5010 indicating that the door has been closed in place. When the inner controller 5010 receives the door leaf position signal, receives the latch bolt retracting signal sequence and the latch bolt extending signal sequence in sequence, and detects and confirms that the locking condition is met by itself, the motor main driver 509 and the electric mechanism 2 automatically drive the latch bolt assembly 4 to complete locking, and then the inner controller 5010 feeds back the locking completion signal to the outer controller 801. Thus, the electric lock body 100 can be automatically locked in the door leaf closed state, so that potential safety hazards caused by forgetting to lock after a user enters a house or leaves the house are prevented. When the inner controller 5010 does not feed back a signal of completion of locking to the outer controller 801 within a specific time, it indicates that the inner circuit board 500 is faulty, and at this time, the outer controller 801 controls the motor standby driver 802 to start the electric mechanism 2 to implement locking. If the door leaf position sensor 504 fails to transmit a door leaf position signal to the inner controller 5010, a person standing outside the door can perform a strong lock outside the door through the outer lock button 105.

An alarm 503 is further provided on the electric lock body 100, and the alarm 503 is in signal connection with the internal controller 501. When the internal controller 501 receives the latch retract signal sequence but does not receive the latch extend signal sequence within a buffer time, for example, 3 seconds, it indicates that the latch assembly is false locked or that a latch position sensor (505 or 507) is malfunctioning, and an alarm prompt signal is sent out by the alarm 503 to remind the user. When the inner controller 5010 receives the latch retraction signal sequence and the latch extension signal sequence in sequence, but does not receive the signal indicating that the door leaf is closed sent by the door leaf position sensor 504 within the buffer time, this indicates that the door leaf is not closed in place, and sends an alarm prompt signal to remind the user through the alarm 503. In both of the above-described fault conditions, the internal controller 5010 does not actuate the electric mechanism 2 to lock, but can do so outside the door by manually actuating the structure and the external lock button 105. The alarm 503 is further configured to send an alarm prompt signal to remind a user to repair in time when the door leaf position sensor 504 or the motor main driver 509 fails.

As shown in fig. 13, an unlocking instruction pickup device 108 is further provided on the outer lock panel 102, and the unlocking instruction pickup device 108 may be a bio-signal pickup device, a key instruction signal pickup device, or a remote unlocking instruction pickup device. The unlocking instruction pickup device 108 is in signal connection with the external controller 801, and the unlocking instruction pickup device 108 is used for picking up an unlocking instruction and transmitting an unlocking instruction signal corresponding to the unlocking instruction to the external controller 801 for verification. The external controller 801 sends an unlocking command to the internal controller 5010 on the basis of verifying that the unlocking command signal is correct. The inner controller 5010 automatically drives the square tongue assembly 4 to unlock through the motor main driver 509 and the electric mechanism 2, and feeds back the unlock completion signal to the outer controller 801. When the inner controller 5010 does not feed back a signal of unlocking completion to the outer controller 801 within a specific time, it indicates that the inner circuit board 500 has failed, and at this time, the outer controller 801 controls the motor standby driver 802 to start the electric mechanism 2 to unlock.

Unlocking and locking can also be realized in the door, as shown in fig. 13, an inner unlocking button 107 and an inner locking button 106 are arranged on the inner locking panel 101, the inner unlocking button 107 and the inner locking button 106 are respectively connected with the outer controller 801 in a signal manner, the inner locking button 106 is used for implementing forced locking in the door, and the inner unlocking button 107 is used for implementing unlocking in the door. According to the above technical solution, when the inner unlocking button 107 is activated, the outer controller 801 controls to drive the electric mechanism 2 to unlock through the inner controller 5010 and the motor main driver 509 according to the activation signal of the inner unlocking button 107, or directly controls to drive the electric mechanism 2 to unlock through the motor standby driver 802 when the inner circuit board 500 fails. When the inner unlocking button 107 is started, the outer controller 801 controls and drives the electric mechanism 2 to unlock through the inner controller 5010 and the motor main driver 509 according to a starting signal of the inner unlocking button 107, or directly controls and drives the electric mechanism 2 to unlock through the motor standby driver 802 when the inner circuit board 500 fails. That is, not only can the forced locking be realized, but also the forced unlocking can be realized in the door.

Claims

1. The lock with the emergency unlocking structure comprises a lock body, wherein the lock body comprises a lock shell, and the lock is characterized in that a square tongue assembly used for locking, a first shifting arm used for driving the square tongue assembly to realize locking and unlocking, and an electric mechanism used for driving the first shifting arm to rotate are arranged in the lock shell, and the first shifting arm drives the square tongue assembly to lock or unlock in a shifting mode; the second shifting arm is rotatably arranged in the lock shell or directly connected to the manual driving mechanism, and when the manual driving mechanism is combined to the lock body, the second shifting arm can be driven by the manual driving mechanism to drive the square bolt assembly to lock or unlock in a shifting mode; the electric mechanism drives the first shifting arm to be separated from the square tongue assembly and enables the first shifting arm to stay at a safe position after locking or unlocking is completed, the first shifting arm stays at the safe position to enable the first shifting arm to avoid the square tongue assembly at the moment, and the manual driving mechanism is used for driving the square tongue assembly to move to lock or unlock by utilizing the second shifting arm to drive the first shifting arm to stay at the safe position; an inner circuit board is also arranged in the lock shell, an inner controller and a motor main driver which is connected with the inner controller in a signal way are arranged on the inner circuit board, and the motor main driver controls and drives the electric mechanism; the novel electric lock is characterized by further comprising an outer lock panel and an inner lock panel, wherein an outer circuit board is further arranged on the outer lock panel or the inner lock panel, an outer controller and a motor standby driver which is in signal connection with the outer controller are arranged on the outer circuit board, the motor standby driver also controls and drives the electric mechanism, and the inner controller is in signal connection with the outer controller; an outer locking button is arranged on the outer locking panel, and the outer locking button is in signal connection with the outer controller; the outer locking button is used for controlling and driving the electric mechanism to act through the inner controller and the motor main driver according to a starting instruction of the outer locking button when the outer locking button is started, so that the door is locked in a forced mode, or directly controlling and driving the electric mechanism to act through the motor standby driver when the inner circuit board breaks down, so that the door is locked in a forced mode.

2. The lock of claim 1, further comprising a door leaf position sensor for detecting a door leaf position, the door leaf position sensor in signal communication with the inner controller, the outer lock button for effecting a forced locking out of the door in the event of a failure of the door leaf position sensor.

3. The lock of claim 1, further comprising a latch assembly disposed in the lock housing, a latch position sensor for detecting a latch extended position, the latch position sensor in signal communication with the inner controller, the outer locking button for effecting a forced locking out of the door when the latch position sensor fails.

4. The lock according to claim 1, wherein an inner unlocking button and an inner locking button are provided on the inner locking panel, the inner unlocking button and the inner locking button being respectively signally connected to the outer controller, the inner locking button being used for performing a forced locking in the door, the inner unlocking button being used for performing an unlocking in the door.

5. The lock according to claim 1, further comprising an unlocking instruction pick-up device, the unlocking instruction pick-up device is disposed on the outer lock panel, the unlocking instruction pick-up device is in signal connection with the outer controller, and the unlocking instruction pick-up device is used for picking up an unlocking instruction and transmitting an unlocking instruction signal corresponding to the unlocking instruction to the outer controller for verification.

6. The lock of claim 1, further comprising a back-up sensor disposed in a layout space of the inner circuit board, the back-up sensor being signally connected to the outer controller, the back-up sensor being adapted to sense a signal that the first toggle arm has been disengaged from the tongue assembly in a secure position and to communicate to the outer controller.

7. The lock of any one of claims 1 to 6, further comprising a position display in signal communication with the outer controller, the position display for displaying a signal that the first toggle arm has been disengaged from the blade assembly in a secure position.

8. The lock according to any one of claims 1 to 6, wherein the electric mechanism includes a driving motor and a speed reducing mechanism driven by the driving motor, the speed reducing mechanism driving the first dial arm to rotate; the lock is characterized in that a first shifting device which is rotationally arranged is further arranged in the lock shell, the first shifting arm is arranged on the first shifting device, an output gear is arranged on an output shaft of the speed reducing mechanism, the first shifting device comprises a transmission fluted disc which can be meshed with the output gear for transmission, and the speed reducing mechanism drives the first shifting device and the first shifting arm to rotate forward and backward through meshing transmission between the output gear and the transmission fluted disc.

9. The lock according to any one of claims 1 to 6, wherein the manual driving mechanism comprises a mechanical lock cylinder opened by a mechanical key and an in-door knob disposed in front of and behind the mechanical lock cylinder, the second shifting arm is located between an output shaft of the in-door knob and an output shaft of the mechanical lock cylinder, and the second shifting arm can extend into the lock body and can drive the tongue assembly to lock or unlock when the second shifting arm rotates; the second shifting arm is connected to the output shaft of the in-door knob and can rotate along with the output shaft of the in-door knob, and can be simultaneously connected to the output shaft of the mechanical lock cylinder and can rotate along with the output shaft of the mechanical lock cylinder after the key is inserted.

10. The lock according to any one of claims 1 to 6, wherein the outer controller is further configured to drive the first toggle arm to rotate back to the safe position through the motor main driver and the motor control in response to a locked rotor signal of the motor mechanism, or to drive the first toggle arm to rotate back to the safe position through the motor standby driver directly when the inner circuit board fails.