CN213710720U - Intelligent door lock body - Google Patents

Abstract

The utility model discloses an intelligence lock body, including the lock shell, a handle, handle thumb wheel and first micro-gap switch, the figure of handle is two, both sides are formed with the handle installation position that supplies the handle installation respectively around the lock shell, handle thumb wheel and first micro-gap switch's figure is two, each handle thumb wheel corresponds in the lock shell is located with rotatable and the spacing mode in a left side and right side to the handle installation position, and it passes through the connecting rod and is connected with the handle that corresponds, so that two handles divide to locate the lock shell outside and be located the lock shell both sides around, each first micro-gap switch corresponds one side of locating each handle thumb wheel and towards this handle thumb wheel, each handle thumb wheel is formed with two contacts towards the outside arch of the one end of the first micro-gap switch that corresponds, these two contact interval distributions, first micro-gap switch's operation button is towards the interval department of these two contacts, these two contacts connect with first micro-gap switch's operation button respectively along with the rotation and the reverse rotation of the handle thumb wheel that corresponds Touch and press.

Description

Intelligent door lock body

Technical Field

The utility model relates to a tool to lock field especially relates to an intelligence lock body.

Background

The door lock generally adopts the intelligence lock for improving its ease of use and security, when daily use, generally realizes unblanking or the back locking of door through rotating the handle mode, unblanks and back locking and realizes with interior handle of rotation door or outer handle of door. In order to prevent other people from entering at will, the handle can be rotated to realize the back locking, however, most of the existing door locks only sense the unlocking signal of the handle and cannot sense the back locking signal of the handle, and the existing door locks cannot distinguish which handle is used for opening the door or locking the door.

Accordingly, there is a need for an intelligent door lock body that can solve the above-mentioned drawbacks to sense the unlocking signal and the back locking signal of the front and back handles.

Disclosure of Invention

The utility model aims to solve the technical problem that an intelligence lock body is with unlocking signal and the anti-lock signal of response preceding, back handle is provided.

In order to solve the technical problem, the utility model discloses a as follows technical scheme: an intelligent door lock body comprises a lock shell, two handles, two handle thumb wheels and two first micro switches, wherein the front side and the rear side of the lock shell are respectively provided with a handle mounting position for mounting the handles, the number of the handle thumb wheels and the number of the first micro switches are two, each handle thumb wheel is arranged in the lock shell corresponding to each handle mounting position in a rotatable and left-right limiting mode, a containing hole for placing a connecting rod is formed in each handle thumb wheel to be connected with the corresponding handle through the connecting rod, so that the two handles are respectively arranged outside the lock shell and positioned at the front side and the rear side of the lock shell, each first micro switch is correspondingly arranged at one side of each handle thumb wheel and faces the handle thumb wheel, two contacts are formed by outwards protruding one end of each handle thumb wheel facing the corresponding first micro switch and are distributed at intervals, an operating button of each first micro switch faces the interval of the two contacts, the two contacts are respectively contacted with and pressed by the operating button of the first microswitch along with the forward rotation and the reverse rotation of the corresponding handle thumb wheel.

The further technical scheme is as follows: the first microswitch also comprises an operating rod, the hanging end of the operating rod faces the operating button, the hanging end of the operating rod of the first microswitch is positioned at the interval of the two contacts and separated from the operating button of the first microswitch, and the two contacts are respectively contacted with the operating rod of the first microswitch along with the forward rotation and the reverse rotation of the handle thumb wheel and are pressed to enable the operating rod to press the operating button.

The further technical scheme is as follows: a square tongue component and a second microswitch are also arranged in the lock shell, the square tongue component comprises a square tongue, a square tongue connecting plate and a main thumb wheel, the square tongue connecting plate is arranged in the lock shell and is connected with the square tongue, a guide groove is formed on the main poking wheel, the main poking wheel is arranged in the lock shell in a manner of rotating and limiting left and right, and one end of the main thumb wheel is provided with a convex point corresponding to the guide groove, the convex point is arranged in the guide groove to move along the guide groove along with the rotation of the main thumb wheel so as to poke the dead bolt connecting plate to move, the second microswitch is arranged on one side of the main thumb wheel and faces the main thumb wheel, the other end of the main thumb wheel faces the second microswitch, and the driving button of the second microswitch faces the groove, so that the other end of the main thumb wheel is contacted with and pressed by the driving button when the main thumb wheel rotates.

The further technical scheme is as follows: the second micro-gap switch still includes the actuating lever, the free end of actuating lever faces the drive button, the free end of the actuating lever of second micro-gap switch is located in the recess and with the drive button separation of second micro-gap switch, so that its other end contacts with the actuating lever of second micro-gap switch and presses and makes when main thumb wheel rotates the drive button is pressed to the actuating lever.

The further technical scheme is as follows: still be equipped with oblique tongue subassembly and third micro-gap switch in the lock shell, the oblique tongue subassembly includes oblique tongue and oblique tongue connecting plate, the oblique tongue connecting plate sets up in the lock shell, and its one end is connected with the oblique tongue, third micro-gap switch is located one side of oblique tongue connecting plate and towards the middle part of oblique tongue connecting plate, the middle part of oblique tongue connecting plate towards one side of third micro-gap switch inwards caves in and forms the depressed part, third micro-gap switch's button towards the depressed part, so that when the oblique tongue is taken in the lock shell, the one end of oblique tongue connecting piece with the button contact is pressed.

The further technical scheme is as follows: the third microswitch also comprises a moving rod, the free end of the moving rod faces to the button, and the free end of the moving rod of the third microswitch is positioned in the depressed part and separated from the button of the third microswitch, so that when the latch tongue is collected in the lock shell, one end of the latch tongue connecting piece is contacted with the moving rod and pressed to enable the moving rod to press the button.

The further technical scheme is as follows: the latch bolt component further comprises a spring, the spring is arranged in the lock shell, one end of the spring is connected with the other end of the latch bolt connecting plate, and the other end of the spring is fixedly connected with the lock shell.

The further technical scheme is as follows: the lock shell is internally provided with a positioning column corresponding to the latch bolt connecting plate, the latch bolt connecting plate is provided with a sliding groove corresponding to the positioning column along the moving direction of the latch bolt connecting plate, and the positioning column is arranged in the sliding groove so as to ensure that the latch bolt connecting plate is arranged in the lock shell.

The utility model has the advantages of: the utility model discloses intelligence lock body is through respectively in preceding, one side of the handle thumb wheel that the back handle is connected sets up a first micro-gap switch, and the handle thumb wheel is towards the outside protruding two contacts that form in interval of the outside one end of the first micro-gap switch that correspond, and first micro-gap switch's operating button is towards the interval department of these two contacts, so that these two contacts contact and press with the operating button contact of the first micro-gap switch that corresponds respectively along with the forward rotation and the antiport of handle thumb wheel, so that both can respond to the forward rotation of handle thumb wheel, can respond to the antiport of handle thumb wheel again, and according to the operating condition information of the first micro-gap switch that corresponds, can learn the handle that this first micro-gap switch corresponds and take place the rotation action, thereby the user can be known in indoor still outdoor rotation handle to the analysis, thereby before the response, the signal of unblanking and the anti-lock signal of back handle.

Drawings

Fig. 1 is a schematic view of the internal structure of the intelligent door lock body of the present invention;

FIG. 2 is a schematic diagram of the internal structure of the intelligent door lock body shown in FIG. 1 when the intelligent door lock body is locked reversely;

fig. 3 is a schematic view of the internal structure of the intelligent door lock body shown in fig. 1 when the intelligent door lock body is unlocked.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings and examples.

Referring to fig. 1 to 3, the intelligent door lock 10 of the present invention includes a lock housing 11, two handles, two handle dials 12 and two first micro switches 13, wherein the front and rear sides of the lock housing 11 are respectively formed with two handle mounting positions for mounting the handles, the number of the handle dials 12 and the number of the first micro switches 13 are two, each of the handle dials 12 is rotatably disposed in the lock housing 11 corresponding to each of the handle mounting positions in a left-right limiting manner, and is formed with a receiving hole 121 for receiving a connecting rod to be connected to the corresponding handle through the connecting rod, so that the two handles are respectively disposed outside the lock housing 11 and located at the front and rear sides of the lock housing 11, each of the first micro switches 13 is correspondingly disposed at one side of each of the handle dials 12 and faces the handle dials 12, each of the handle dials 12 protrudes outward toward one end of the corresponding first micro switch 13 to form two contacts 122, the two contacts 122 are distributed at intervals, the operating button 131 of the first microswitch 13 faces the interval of the two contacts 122, and the two contacts 122 are respectively contacted with and pressed by the operating button 131 of the first microswitch 13 along with the forward rotation and the reverse rotation of the corresponding handle thumb wheel 12.

The handle thumb wheel 12 is in transmission connection with the handle through a connecting rod, the forward direction refers to the rotating direction of the handle during unlocking, the reverse direction refers to the rotating direction during reverse locking, and the forward direction and the reverse direction are opposite. The intelligent door lock body 10 is in communication connection with a control module of the door lock to transmit working state information of the corresponding first micro switch 13 to the control module, so as to sense unlocking signals and back locking signals of the front handle and the back handle. The first micro switch 13 is arranged on one side of the handle thumb wheel 12 connected with the front handle and the rear handle respectively, two contacts 122 are protruded outwards at intervals at one end of the handle thumb wheel 12 facing the corresponding first micro switch 13, and the operating button 131 of the first micro switch 13 faces the interval between the two contacts 122, so that the two contacts 122 are respectively contacted and pressed with the operating button 131 of the corresponding first micro switch 13 along with the forward rotation and the reverse rotation of the handle thumb wheel 12, the forward rotation of the handle thumb wheel 12 can be sensed, the reverse rotation of the handle thumb wheel 12 can be sensed, the rotating action of the handle corresponding to the first micro switch 13 can be known according to the working state information of the corresponding first micro switch 13, the handle can be analyzed and known to rotate indoors or outdoors, and the unlocking signal of the front handle and the reverse locking signal of the rear handle can be sensed.

Specifically, in this embodiment, each of the first microswitches 13 further includes an operating rod 132, a free end of the operating rod 132 faces the operating button 131, the free end of the operating rod 132 of the first microswitches 13 is located at a space between two contacts 122 and is separated from the operating button 131 of the first microswitches 13, and the two contacts 122 respectively contact and press the operating rod 132 of the first microswitches 13 along with the forward rotation and the reverse rotation of the handle wheel 12, so that the operating rod 132 presses the operating button 131.

Specifically, in this embodiment, a square tongue assembly 14 and a second micro switch 15 are further disposed in the lock case 11, the square tongue assembly 14 includes a square tongue 141, a square tongue connecting plate 142 and a main thumb wheel 143, the square tongue connecting plate 142 is disposed in the lock case 11 and connected to the square tongue 141, a guide groove 1421 is formed thereon, the main thumb wheel 143 is rotatably disposed in the lock case 11 in a left-right limiting manner, and a protruding point is formed at one end of the main thumb wheel 143 corresponding to the guide groove 1421 in a protruding manner, the protruding point is disposed in the guide groove 1421 to move along the guide groove 1421 with the movement of the main thumb wheel 143, the second micro switch 15 is disposed at one side of the main thumb wheel 143 and faces the main thumb wheel 143, the other end of the main thumb wheel 143 faces the second micro switch 15, and is recessed inwardly to form a groove 1431, the driving knob of the second micro switch 15 faces the groove 1431, so that the other end of the main thumb wheel 143 contacts and presses the driving button 151 when the main thumb wheel 143 rotates, so that the operating state information of the second micro switch 15 is turned on. One end of the square tongue 141 is connected with one end of the square tongue connecting plate 142 and is located in the lock case 11, and the other end of the square tongue 141 can extend out of the lock case 11 and can make telescopic motion relative to the lock case 11, so as to realize the functions of back locking and unlocking. The intelligent door lock body 10 is in communication connection with a control module of the door lock to transmit the working state information of the second microswitch 15 to the control module.

Preferably, in this embodiment, the second micro-switch 15 further includes a driving rod 152, a free end of the driving rod 152 faces the driving button 151, and a free end of the driving rod 152 of the second micro-switch 15 is located in the groove 1431 and separated from the driving button 151 of the second micro-switch 15, at this time, the operating state information of the second micro-switch 15 is off, so that when the main dial 143 rotates, the other end thereof contacts and presses the driving rod 152 of the second micro-switch 15 to press the driving button 151 by the driving rod 152, and the operating state of the second micro-switch 15 becomes on.

Specifically, in this embodiment, an inclined tongue assembly 16 and a third micro switch are further disposed in the lock housing 11, the inclined tongue assembly 16 includes an inclined tongue 161 and an inclined tongue connecting plate 162, the inclined tongue connecting plate 162 is disposed in the lock housing 11, and one end of the inclined tongue assembly is connected to the inclined tongue 161, the third micro switch is disposed on one side of the inclined tongue connecting plate 162 and faces the middle portion of the inclined tongue connecting plate 162, the middle portion of the inclined tongue connecting plate 162 faces one side of the third micro switch and is recessed inward to form a recessed portion 1621, and a button of the third micro switch faces the recessed portion 1621, so that when the inclined tongue 161 is received in the lock housing 11, one end of the inclined tongue connecting plate 162 contacts with and presses the button, and the operating state information of the third micro switch is closed. One end of the latch bolt 161 is connected with one end of the latch bolt connecting plate 162 and is located in the lock case 11, and the other end of the latch bolt 161 extends out of the lock case 11 and can make a retracting movement relative to the lock case 11, so as to achieve an unlocking function. The control module is in communication connection with the intelligent door lock body 10 to acquire working state information of the third microswitch.

Preferably, in this embodiment, the third micro switch further includes a moving rod 17, a free end of the moving rod faces the button, the free end of the moving rod 17 of the third micro switch is located in the recess 1621 and separated from the button of the third micro switch, at this time, the working state information of the third micro switch is off, and when the latch tongue 161 is received in the lock case, one end of the latch tongue connecting piece 162 may contact and press the moving rod 17 to press the button of the moving rod 17, so that the working state information of the third micro switch becomes on.

The control module of the door lock can sense the unlocking signal and the back locking signal of the handle according to the working state information of the first microswitch 13 and the working state information of the second microswitch 15 and the third microswitch. The number of the handles is two, the handles are respectively positioned on the front side and the rear side of the lock shell 11 and are respectively arranged indoors and outdoors, the number of the handle thumb wheels 12 and the number of the first micro switches 13 are two, each handle thumb wheel 12 corresponds to one handle, the handle is arranged in the lock shell 11 and is connected with the handle, and each first micro switch 13 is respectively arranged on one side of each handle thumb wheel 12 and faces the handle thumb wheel 12. The handle, the handle thumb wheel 12 and the corresponding first microswitch 13 are respectively arranged on the front side and the rear side of the lock shell 11, so that the unlocking signal and the back locking signal of the handle on the front side and the rear side of the lock shell 11 are respectively sensed. The control module of the door lock can know that the handle corresponding to the first microswitch 13 rotates according to the working state information of the first microswitch 13, so that the user can be known to rotate the handle indoors or outdoors through analysis, the states of the square bolt 141 and the inclined bolt 161 are known through combination of the working state information of the second microswitch 15 and the third microswitch, the user is known to perform the operation of back locking or unlocking through analysis, the user is further known to perform the rotation of back locking/unlocking on the handle indoors/outdoors, and the unlocking signals and the back locking signals of the front handle and the back handle are sensed.

In an initial state, the square tongue 141 is received in the lock case 11, the other end of the main dial wheel 143 contacts and presses the driving rod 152, so that the driving rod 152 presses the driving button 151, the working state information of the second micro switch 15 is closed, the inclined tongue 161 completely extends out of the lock case 11, the free end of the moving rod 17 of the third micro switch is located in the recessed portion 1621 of the inclined tongue connecting plate 162, the moving rod 17 of the third micro switch is separated from the button, the working state information of the third micro switch is open, the user does not rotate the handle, the free end of the operating rod 132 of the first micro switch 13 is located at the interval between the two contacts 122 of the handle dial wheel 12, the operating rod 132 is separated from the operating button 131, and the working state information of the first micro switch 13 is open.

When the lock is unlocked, the user rotates the handle to drive the handle wheel 12 to rotate reversely, so that one of the contacts 122 of the handle wheel 12 contacts the operating rod 132 and presses, so that the operating lever 132 presses the operating knob 131, the operating state information of the first micro switch 13 is closed, and at this time, the reverse rotation of the handle thumb wheel 12 triggers the rotation of the main thumb wheel 143 and the protruding point at one end of the main thumb wheel 143 moves along the guide groove 1421, so that the square tongue connecting plate 142 drives the square tongue 141 to extend out of the lock case 11, the free end of the driving rod 152 is located in the groove 1431 of the main thumb wheel 143, and the driving lever 152 is separated from the driving knob 151, the operation state information of the second micro switch 15 is off, the latch bolt 161 is completely extended out of the lock case 11, the suspended end of the moving rod 17 of the third microswitch is positioned in the recessed part 1621 of the latch bolt connecting plate 162, the moving rod 17 of the third microswitch is separated from the button, and the working state information of the third microswitch is off. According to the fact that the working state of the first micro switch 13 corresponding to the handle is changed from off to on, the working state of the second micro switch 15 is changed from on to off, and the working state of the third micro switch is kept off, the handle is unlocked, and the unlocking signal of the handle is obtained through induction.

When unlocking, the user rotates the handle to drive the handle wheel 12 to rotate in forward direction, so that the other contact 122 of the handle wheel 12 contacts the operating rod 132 and presses, so that the operating lever 132 presses the operating knob 131, the operating state information of the first micro switch 13 is closed, and at this time, the rotation of the handle thumb wheel 12 in the forward direction triggers the rotation of the main thumb wheel 143 and the protruding point at one end of the main thumb wheel 143 moves along the guide groove 1421, the square tongue connecting plate 142 drives the square tongue 141 to retract into the lock case 11, the rotation of the main thumb wheel 143 causes the other end of the main thumb wheel 143 to contact and press the driving rod 152, the driving rod 152 presses the driving button 151, the operating status information of the second micro switch 15 is closed, the latch bolt 161 makes a retracting movement relative to the lock case 11, one end of the latch bolt connecting plate 162 is in contact with the moving rod 17 of the third microswitch and is pressed, the moving rod 17 presses the button, and the working state information of the third microswitch is closed. According to the operating state of the first microswitch 13 corresponding to the handle, the operating state is changed from off to on, the operating state of the second microswitch 15 is kept on, and the operating state of the third microswitch is changed from off to on, the handle is unlocked, and the unlocking signal of the handle is obtained by induction.

Specifically, in the present embodiment, the latch bolt assembly 16 further includes a spring 163, the spring 163 is disposed in the lock housing 11 and has one end connected to the other end of the latch bolt connecting plate 162, and the other end of the spring 163 is fixedly connected to the lock housing 11. In the initial state, that is, when the spring 163 is the original length, the latch bolt 161 is completely extended out of the lock case 11, and the latch bolt 161 retracted into the lock case 11 can be quickly restored to be extended out of the lock case 11 by using the characteristics of the spring 163. Preferably, a positioning column 111 is arranged in the lock case 11 corresponding to the latch tongue connecting plate 162, a sliding groove 1622 is formed on the latch tongue connecting plate 162 corresponding to the positioning column 111 along the moving direction of the latch tongue connecting plate 162, and the positioning column 111 is inserted into the sliding groove 1622, so that the latch tongue connecting plate 162 is installed in the lock case 11, and the latch tongue connecting plate 162 can be prevented from being displaced during the moving process.

In summary, the intelligent door lock body of the utility model is provided with a first micro-switch at one side of the handle thumb wheel connected with the front and the rear handles, and one end of the handle thumb wheel facing the corresponding first microswitch is protruded outwards at intervals to form two contacts, and the operating button of the first microswitch faces the interval of the two contacts, so that the two contacts respectively contact and press with the corresponding operating buttons of the first micro-switches along with the forward rotation and the reverse rotation of the handle thumb wheel, so as to sense the positive rotation of the handle thumb wheel and the reverse rotation of the handle thumb wheel, and to know the rotation of the handle corresponding to the first microswitch according to the working state information of the corresponding first microswitch, therefore, the user can be analyzed to know whether the handle is rotated indoors or outdoors, and the unlocking signal and the back locking signal of the front handle and the back handle are sensed.

The foregoing is considered as illustrative of the preferred embodiments of the invention and is not intended to limit the invention in any way. Various equivalent changes and modifications can be made on the basis of the above embodiments by those skilled in the art, and all equivalent changes and modifications within the scope of the claims should fall within the protection scope of the present invention.

Claims (8)

1. An intelligent door lock body is characterized by comprising a lock shell, two handles, two handle thumb wheels and two first micro switches, wherein the number of the handles is two, the front side and the rear side of the lock shell are respectively provided with handle installation positions for installing the handles, the number of the handle thumb wheels and the number of the first micro switches are two, each handle thumb wheel is arranged in the lock shell in a rotatable and left-right limiting mode corresponding to each handle installation position, a containing hole for placing a connecting rod is formed in each handle thumb wheel to be connected with the corresponding handle through the connecting rod, so that the two handles are respectively arranged outside the lock shell and positioned at the front side and the rear side of the lock shell, each first micro switch is correspondingly arranged on one side of each handle thumb wheel and faces the handle thumb wheel, one end of each handle thumb wheel, facing the corresponding first micro switch, protrudes outwards to form two contacts which are distributed at intervals, the operating button of the first microswitch faces to the interval of the two contacts, and the two contacts are respectively contacted with and pressed by the operating button of the first microswitch along with the forward rotation and the reverse rotation of the corresponding handle thumb wheel.

2. An intelligent door lock as defined in claim 1, wherein each of said first microswitches further comprises an operating rod, a free end of said operating rod faces said operating button, the free end of said operating rod of said first microswitches is located at a space between said two contacts and is separated from the operating button of said first microswitches, and said two contacts respectively contact with the operating rod of said first microswitches and press the same with the forward rotation and reverse rotation of the handle wheel, so that said operating rod presses the operating button.

3. An intelligent door lock body as claimed in claim 1, wherein a square tongue assembly and a second micro switch are further disposed in the lock case, the square tongue assembly includes a square tongue, a square tongue connecting plate and a main thumb wheel, the square tongue connecting plate is disposed in the lock case and connected with the square tongue, a guide groove is formed thereon, the main thumb wheel is rotatably disposed in the lock case in a left-right limiting manner, a protruding point is formed at one end of the main thumb wheel corresponding to the guide groove, the protruding point is disposed in the guide groove to move along the guide groove along with the rotation of the main thumb wheel, the square tongue connecting plate is moved, the second micro switch is disposed at one side of the main thumb wheel and faces the main thumb wheel, the other end of the main thumb wheel faces the second micro switch and is recessed inwardly to form a groove, a driving knob of the second micro switch faces the micro groove, so that the other end of the main thumb wheel is contacted with the driving button and pressed when the main thumb wheel rotates.

4. The intelligent door lock body of claim 3, wherein the second micro switch further comprises a driving rod, the free end of the driving rod faces the driving button, the free end of the driving rod of the second micro switch is positioned in the groove and separated from the driving button of the second micro switch, so that when the main dial wheel rotates, the other end of the main dial wheel contacts and presses the driving rod of the second micro switch to enable the driving rod to press the driving button.

5. An intelligent door lock body as claimed in claim 1, wherein a latch bolt assembly and a third micro switch are further arranged in the lock case, the latch bolt assembly comprises a latch bolt and a latch bolt connecting plate, the latch bolt connecting plate is arranged in the lock case, one end of the latch bolt connecting plate is connected with the latch bolt, the third micro switch is arranged on one side of the latch bolt connecting plate and faces to the middle of the latch bolt connecting plate, the middle of the latch bolt connecting plate faces to one side of the third micro switch and is inwards recessed to form a recessed portion, and a button of the third micro switch faces to the recessed portion, so that one end of the latch bolt connecting plate is contacted with and pressed by the button when the latch bolt is received in the lock case.

6. The intelligent door lock body of claim 5, wherein the third micro switch further comprises a moving rod, the free end of the moving rod faces the button, and the free end of the moving rod of the third micro switch is located in the recess and separated from the button of the third micro switch, so that when the latch bolt is retracted into the lock case, one end of the latch bolt connecting piece is contacted with the moving rod and pressed to enable the moving rod to press the button.

7. An intelligent door lock body as recited in claim 5, wherein said deadbolt assembly further comprises a spring disposed within said lock housing and having one end connected to the other end of said deadbolt attachment plate, the other end of said spring being fixedly connected to said lock housing.

8. An intelligent door lock body as claimed in claim 5, wherein a positioning column is provided in the lock case corresponding to the latch bolt connecting plate, a sliding slot is formed on the latch bolt connecting plate corresponding to the positioning column along the moving direction of the latch bolt connecting plate, and the positioning column is inserted into the sliding slot so that the latch bolt connecting plate is installed in the lock case.

Images