CN219654477U

CN219654477U - External unlocking mechanism and door lock

Info

Publication number: CN219654477U
Application number: CN202320559608.2U
Authority: CN
Inventors: 刘毅锋
Original assignee: Zhongshan Qiaolang Intelligent Technology Co ltd
Current assignee: Zhongshan Qiaolang Intelligent Technology Co ltd
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2023-09-08
Anticipated expiration: 2033-03-20

Abstract

The embodiment of the utility model provides an external unlocking mechanism and a door lock, wherein the external unlocking mechanism comprises: the outer door handle is used for being connected with a lock body of the door lock and is located at the outer side of the door body, a containing cavity is formed in the outer door handle, a first butt joint hole is formed in the containing cavity towards the side face opening of the outer door handle, the unlocking piece is rotatably arranged in the containing cavity, a second butt joint hole is formed in the unlocking piece, when the lock body is in a locking state, the first butt joint hole can be aligned with the second butt joint hole, and through inserting a fixing piece in the first butt joint hole and the second butt joint hole, the unlocking piece and the outer door handle can synchronously rotate. The door lock includes the external unlocking mechanism. The arrangement of the external unlocking mechanism ensures that the privacy of the space in the door is guaranteed to be higher, and simultaneously, the aesthetic degree of the whole external door handle is improved, and the operation is simple and convenient.

Description

External unlocking mechanism and door lock

Technical Field

The utility model relates to the technical field of door locks, in particular to an external unlocking mechanism and a door lock.

Background

The door lock is a safety tool commonly used in daily life of people, and in different application scenes, the structural function of the door lock often has different characteristics. In a use scenario with low requirements on safety but with low requirements on privacy, such as a bathroom, a door lock handle located in a door often has functions of pulling a lock head, locking and unlocking, and a door handle located outside the door only has the function of pulling the lock head. In order to open the door lock locked from the inside from the outside in an emergency, an unlocking member is preset on the outer door handle, and the door lock can be opened by screwing the unlocking member by using a tool.

In the prior art, the outer door handle is hollow structure, and in the outer door handle was located to the unlatch cover, the unlatch was leaked the tip from the one side of outer door handle towards the user, was provided with the cell body that is used for making things convenient for the instrument to twist on the tip, and under this kind of setting scheme, the tip of unlatch is too obvious, also easily suffered the people to utilize under the non-emergency and lead to the door to be opened from the outside, leads to privacy lack guarantee, and the roughness of door handle is destroyed simultaneously, and aesthetic measure descends.

Disclosure of Invention

The embodiment of the utility model provides an external unlocking mechanism and a door lock, which are used for solving the problems that in the prior art, the arrangement position of an unlocking piece is too obvious, so that the safety of space privacy which can be formed when a door is locked is reduced, and the flatness of a door handle is damaged, so that the attractiveness is reduced.

According to a first aspect, the external unlocking mechanism comprises: including outer door handle and unlocking member, outer door handle is used for being connected with the lock body of lock to be located the outside of the door body, be formed with the holding chamber on the outer door handle, the holding chamber to the side opening of outer door handle forms first butt joint hole, unlocking member with rotatable mode set up in the holding chamber, be formed with the second butt joint hole on the unlocking member, works as the lock body is in the locked state, first butt joint hole with the second butt joint hole aligns, through first butt joint hole with insert the mounting in the second butt joint hole, can make unlocking member with outer door handle realizes synchronous rotation.

As a further alternative of the external unlocking mechanism, the external unlocking mechanism further comprises a connecting component, the connecting component is connected with the external door handle, the connecting component can move between a first position and a second position relative to the external door handle under the action of external force, the connecting component is located outside the second butt joint hole in the first position, the unlocking piece can freely rotate relative to the external door handle, the connecting component is located in the first butt joint hole partially and located in the second butt joint hole partially, the unlocking piece and the external door handle can synchronously rotate, and the connecting component forms the fixing piece.

As a further alternative of the external unlocking mechanism, the connecting component comprises a button and a spring, the button comprises a button cap and a straight rod connected with the button cap, the shape of the button cap is matched with the first butt joint hole, the spring is sleeved outside the straight rod, one end of the spring is connected with the button cap or the straight rod, and the other end of the spring is connected with the surrounding wall of the second butt joint hole; when the connecting assembly is positioned at the first position, the button cap is at least partially positioned outside the first butt joint hole, the straight rod is positioned outside the second butt joint hole, and the spring is in a natural state; when the connecting assembly is in the second position, the button cap is at least partially positioned in the first docking aperture, the straight rod is at least partially positioned in the second docking aperture, and the spring is compressed.

As a further alternative of the external unlocking mechanism, the connecting component comprises a connecting rod, the connecting rod is inserted into the first butt joint hole, a plurality of flanges are formed by protruding outwards from the outer periphery of the connecting rod, a plurality of grooves matched with the flanges are formed by concave walls of the first butt joint hole, the connecting rod is clamped with the first butt joint hole through the flanges and the grooves, the flanges are matched with different grooves, and the connecting rod can be switched between the first position and the second position.

As a further alternative of the external unlocking mechanism, the external door handle includes a handle portion and a sleeve portion formed on the handle portion, and the receiving cavity is formed on the sleeve portion.

As a further alternative to the external unlocking mechanism, the first docking aperture is located on a projection plane of the handle portion on the sleeve portion, such that the handle portion is capable of forming a barrier to the first docking aperture when the user is looking at the external door handle.

According to a second aspect, the present embodiment also provides a door lock comprising an external unlocking mechanism as described in any of the previous embodiments, and a lock body and an internal door handle;

the lock body comprises a lock tongue assembly and a lock assembly connected with the lock tongue assembly, wherein the lock assembly is provided with a locking state enabling the outer door handle to not drive the lock tongue assembly to move and an unlocking state enabling the outer door handle to drive the lock tongue assembly to move;

the inner door handle is connected with the lock body and positioned at the inner side of the door, and can drive the lock assembly to switch between a locking state and an unlocking state;

the outer door handle is connected with the lock body and is positioned at the outer side of the door, the outer door handle can drive the lock tongue component to move in the unlocking state of the lock component,

the unlocking piece is connected with the lock assembly, so that the unlocking piece can drive the lock assembly to switch between a locking state and an unlocking state, a second butt joint hole is formed in the unlocking piece, when the lock assembly is in the locking state, the second butt joint hole is aligned with the first butt joint hole, and when the fixing piece is inserted into the first butt joint hole and the second butt joint hole, the outer door handle has the capacity of driving the lock assembly to switch between the locking state and the unlocking state.

As a further alternative of the door lock, the lock body further includes a housing, a receiving space is formed inside the housing, the lock assembly is disposed in the receiving space, and the latch bolt assembly can be retracted into the housing or extended from the housing under the driving of the lock assembly;

the lock assembly comprises a locking shifting button, a locking sliding block and a locking bolt shifting button, wherein the two locking bolt shifting buttons are abutted to the inner side and the outer side of the locking shifting button and are in rotary connection with the locking shifting button, the locking bolt shifting button is connected with the locking bolt assembly, the unlocking piece is connected with the locking shifting button so as to drive the locking shifting button to rotate, the inner side of the locking bolt shifting button is connected with the inner door handle so as to move along with the inner door handle, and the outer side of the locking bolt shifting button is connected with the outer door handle so as to move along with the outer door handle;

the locking shifting button can be driven to rotate anticlockwise when the inner side of the locking shifting button rotates anticlockwise, the locking shifting button is connected with the locking sliding block, and the anticlockwise rotation of the locking shifting button can drive the locking sliding block to slide and enable the locking sliding block to limit the outer side of the locking shifting button to rotate clockwise so as to achieve a locking state;

the lock tongue is dialled the button clockwise rotation and can be driven the spring tongue subassembly to the inside slip of shell, the spring tongue subassembly to the inside slip of shell can promote the locking is dialled the button and is rotated clockwise, the locking is dialled the button clockwise rotation and can be driven the locking slider is released the restriction of the spring tongue of outside and is dialled the button to reach the unblock state.

As a further alternative scheme of the door lock, the locking knob is provided with a first linkage piece, and the first linkage piece is positioned at the inner side of the locking knob, so that the first linkage piece is positioned on the moving path of the inner side of the locking knob, and can be contacted with the first linkage piece when the inner side of the locking knob rotates anticlockwise, thereby driving the locking knob to rotate anticlockwise;

the locking slide block is provided with a second linkage piece, the second linkage piece is located the outer side of the locking slide block, the locking slide block and the locking pulling button are located on the same vertical plane, when the locking pulling button rotates anticlockwise, the locking slide block can be driven to ascend, the second linkage piece is enabled to be in butt joint with the outer door handle to form a limit, so that a locking state is formed, when the locking pulling button Niu Shun rotates clockwise, the locking slide block can be driven to descend, the limit of the second linkage piece to the outer door handle is released, and the unlocking state is achieved.

As a further alternative scheme of the door lock, the locking knob comprises an unlocking part, an unlocking hole matched with the unlocking piece is formed in the unlocking part, the unlocking piece is inserted into the unlocking hole, a poking arm and a pushing part are arranged on the periphery of the unlocking part, the poking arm is used for being connected with the locking sliding block, so that the locking knob can drive the locking sliding block to move, and the pushing part is used for being linked with the lock tongue assembly, so that the lock tongue assembly can drive the locking knob to move by pushing the pushing part when moving towards the inside of the shell;

the spring bolt is dialled the button and is included the linkage portion, with spring bolt subassembly matched with stir portion and with second linkage piece matched with locking portion, one side of linkage portion with the locking is dialled the button and is connected, the opposite side with interior door handle or outer door handle is connected, stir portion with locking portion set up in the week side of linkage portion stir be formed with on the portion with first linkage piece matched with locking portion.

The implementation of the embodiment of the utility model has the following beneficial effects:

this outside unlocking mechanism sets up first butt joint hole in the side of outer door handle, makes first butt joint hole have certain disguise, under conventional use state, and the privacy in door inner space has higher guarantee, has also promoted the aesthetic measure of whole outer door handle simultaneously to, can make outer door handle possess the unblock function through inserting first butt joint hole and second butt joint hole with the mounting, easy operation is convenient.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Wherein:

FIG. 1 is a schematic view of a door lock according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of an external unlocking mechanism according to an embodiment of the present utility model;

FIG. 3 is an exploded view of a lock according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a portion of a locking assembly and a lock assembly according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a lock body in an unlocked state according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a lock body in a locked state according to an embodiment of the present utility model;

description of main reference numerals:

10-lock body, 11-lock tongue assembly, 111-lock tongue, 112-mounting plate, 113-fixing plate, 114-second spring, 12-lock assembly, 121-locking knob, 1211-unlocking part, 1212-dial arm, 1213-pushing part, 1214-unlocking hole, 122-lock tongue knob, 1221-linkage part, 1222-dial part, 1223-locking part, 1224-locking part, 123-locking slide, 124-first linkage part, 125-second linkage part, 13-housing;

20-an outer door handle, 21-a handle portion, 22-a sleeve portion; 221-a first docking aperture;

30-unlocking pieces and 31-second butt joint holes;

40-fixing piece;

50-positioning components, 51-connecting plates, 52-first springs, 53-positioning pieces and 531-limit grooves.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. Preferred embodiments of the present utility model are shown in the drawings. This utility model may, however, be embodied in many other different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The embodiment of the utility model provides an external unlocking mechanism and a door lock, which are used for solving the problems that in the prior art, the arrangement position of an unlocking piece is too obvious, so that the space privacy and the safety which can be formed when a door is locked are reduced, and the flatness of a door handle is damaged, so that the attractiveness is reduced.

In the embodiment of the present utility model, referring to fig. 1 to 2 in combination, the external unlocking mechanism includes an external door handle 20 and an unlocking member 30, the external door handle 20 is used for being connected with a lock body 10 of a door lock and is located at the outer side of the door body, a receiving cavity is formed on the external door handle 20, a first docking hole 221 is formed on a side opening of the receiving cavity toward the external door handle 20, the unlocking member 30 is rotatably disposed in the receiving cavity, a second docking hole 31 is formed on the unlocking member 30, when the lock body 30 is in a locked state, the first docking hole 221 is aligned with the second docking hole 31, and a fixing member 40 is inserted into the first docking hole 221 and the second docking hole 31, so that the unlocking member 30 and the external door handle 20 can be synchronously rotated.

Referring to fig. 3, the door lock includes a lock body 10, an inner door handle (not shown), and the above-described external unlocking mechanism (an outer door handle 20 and an unlocking member 30). The lock body 10 includes a latch bolt assembly 11 and a lock assembly 12 coupled to the latch bolt assembly 11, the lock assembly 12 having a locked state in which the outer door handle 20 cannot move the latch bolt assembly 11 and an unlocked state in which the outer door handle 20 can move the latch bolt assembly 11.

The inner door handle is connected with the lock body 10 and is positioned at the inner side of the door, and can drive the lock assembly 12 to switch between a locking state and an unlocking state; the outer door handle 20 is connected with the lock body 10 and is positioned at the outer side of the door, the outer door handle 20 can drive the lock tongue assembly 11 to move in the unlocking state of the lock assembly 12, a containing cavity is formed on the outer door handle 20, and a first butt joint hole 221 is formed towards the side opening of the outer door handle 20; the unlocking member 30 is rotatably disposed in the accommodating cavity, the unlocking member 30 is connected with the lock assembly 12, so that the unlocking member 30 can drive the lock assembly 12 to switch between a locking state and an unlocking state, a second butt joint hole 31 is formed on the unlocking member 30, when the lock assembly 12 is in the locking state, the second butt joint hole 31 is aligned with the first butt joint hole 221, and when the fixing member 40 is inserted into the first butt joint hole 221 and the second butt joint hole 31, the outer door handle 20 has the capability of driving the lock assembly 12 to switch between the locking state and the unlocking state.

This outside unlocking mechanism sets up first butt joint hole 221 in the side of outer door handle 20, makes first butt joint hole 221 have certain disguise, under conventional use state, and the privacy in door inner space has higher guarantee, has also promoted the aesthetic measure of whole outer door handle 20 simultaneously to, through inserting mounting 40 in first butt joint hole 221 and the second butt joint hole 31, can make outer door handle 20 possess the unblock function, easy operation is convenient.

In embodiments of the present utility model, the inner door handle and the outer door handle 20 may be of a design that is more conventional in the art.

In one embodiment, the outer door handle 20 includes a handle portion 21 and a sleeve portion 22 formed on the handle portion 21, and the receiving cavity is formed on the sleeve portion 22.

To better conceal the first docking aperture 221, in a specific embodiment, the first docking aperture 221 is located on the projection surface of the handle portion 21 on the sleeve portion 22, such that the handle portion 21 is able to form a barrier to the first docking aperture 221 when the user is looking at the outer door handle 20.

In other embodiments, the outer door handle 20 and the inner door handle may be configured in other configurations such as knob-like or cylindrical.

In a simpler design of the external unlocking mechanism, when external unlocking is required in an emergency, an operator is required to take the fixing member 40, the fixing member 40 may be a screwdriver, a pin, a screw or other rod-shaped or rod-shaped member, however, a certain time is often required to find the fixing member 40, and if a person in the door is in a dangerous state, the finding of the fixing member 40 may cause delay in rescue time.

To solve the above problem, in one embodiment, the external unlocking mechanism further includes a connection assembly connected to the external door handle 20, and the connection assembly can move between a first position and a second position relative to the external door handle 20, wherein the connection assembly is located entirely outside the second docking hole 31, so that the unlocking member 30 can freely rotate relative to the external door handle 20 under the action of external force, and the connection assembly is located partially in the first docking hole 221 and partially in the second docking hole 31, so that the unlocking member 30 and the external door handle 20 can synchronously rotate. At this time, the connection assembly constitutes the fixing member 40.

The advantage of the above embodiment is that the connection assembly is directly arranged at the position of the first docking hole 221, so that the operator can conveniently open the door lock from the outside in an emergency state, and the time for searching for tools is saved.

In a specific embodiment, the connecting component comprises a button and a spring, the button comprises a button cap and a straight rod connected with the button cap, the shape of the button cap is matched with the first butt joint hole, the spring is sleeved outside the straight rod, one end of the spring is connected with the button cap or the straight rod, the other end of the spring is connected with the surrounding wall of the second butt joint hole, when the connecting component is in the first position, the button cap is at least partially located outside the first butt joint hole, the straight rod is located outside the second butt joint hole, the spring is in a natural state, when the connecting component is in the second position, the button cap is at least partially located in the first butt joint hole, the straight rod is at least partially located in the second butt joint hole, and the spring is compressed.

In another specific embodiment, the connecting component includes a connecting rod, the connecting rod is inserted into the first docking hole 221, the outer periphery of the connecting rod protrudes outwards to form a plurality of flanges, the surrounding wall of the first docking hole 221 is concave inwards to form a plurality of grooves matched with the flanges, the connecting rod is clamped with the first docking hole 221 through the flanges and the grooves, and the flanges are matched with different grooves, so that the connecting rod can be switched between the first position and the second position.

The specific structure of the lock body 10 will be further described below. It should be noted that the application object of the external unlocking mechanism in the embodiment of the present utility model is not limited to the lock body stated in the present specification, and is also applicable to other lock bodies having an external emergency unlocking function.

In one embodiment, referring to fig. 3 to 6 in combination, the lock body 10 further includes a housing 13, in which a receiving space is formed inside the housing 13, and the lock assembly 12 is disposed in the receiving space, and the latch bolt assembly 11 can be retracted into the housing 13 or extended from the housing 13 by driving the lock assembly 12.

The lock assembly 12 comprises a locking knob 121, a bolt knob 122 and a locking sliding block 123, wherein the two bolt knobs 122 are attached to the inner side and the outer side of the locking knob 121 and are rotationally connected with the locking knob 121, the bolt knob 122 is connected with the bolt assembly 11, the unlocking piece 30 is connected with the locking knob 121, so that the locking knob 121 can be driven to rotate, the inner side bolt knob 122 is connected with an inner door handle, and accordingly can move along with the inner door handle, and the outer side bolt knob 122 is connected with the outer door handle 20, and accordingly can move along with the outer door handle 20.

When the inner lock tongue pulling button 122 rotates anticlockwise, the locking pulling button 121 can be driven to rotate anticlockwise, the locking pulling button 121 is connected with the locking sliding block 123, and the anticlockwise rotation of the locking pulling button 121 can drive the locking sliding block 123 to slide and enable the locking sliding block 123 to limit the outer lock tongue pulling button 122 to rotate clockwise so as to achieve a locking state; the clockwise rotation of the lock tongue pulling button 122 can drive the lock tongue assembly 11 to slide towards the inside of the shell 13, the lock tongue assembly 11 can push the lock pulling button 121 to rotate clockwise when sliding towards the inside of the shell 13, and the lock pulling button 121 can drive the lock sliding block 123 to release the limit of the lock tongue pulling button 122 on the outer side so as to achieve an unlocking state.

In a specific embodiment, the locking knob 121 is provided with a first linkage member 124, and the first linkage member 124 is located on the inner side of the locking knob 121, so that the first linkage member 124 is located on the moving path of the inner side locking knob 122, and when the inner side locking knob 122 rotates counterclockwise, the first linkage member 124 can be contacted, thereby driving the locking knob 121 to rotate counterclockwise.

In a more specific embodiment, the second linkage member 125 is disposed on the locking slider 123, the second linkage member 125 is located at the outer side of the locking slider 123, the locking slider 123 and the locking knob 121 are located on the same vertical plane, when the locking knob 121 rotates anticlockwise, the locking slider 123 can be driven to rise, so that the second linkage member 125 abuts against the outer door handle 20 to form a limit, and a locking state is formed, when the locking knob 121 rotates clockwise, the locking slider 123 can be driven to fall, so that the limit of the second linkage member 125 to the outer door handle 20 is released, and the unlocking state is achieved.

In a further specific embodiment, the locking knob 121 includes an unlocking portion 1211, an unlocking hole 1214 that is matched with the unlocking member 30 is provided in the unlocking portion 1211, the unlocking member 30 is inserted into the unlocking hole 1214, a pulling arm 1212 and a pushing portion 1213 are provided along the periphery of the unlocking portion 1211, the pulling arm 1212 is used for being connected with the locking slider 123, so that the locking knob 121 can drive the locking slider 123 to move, and the pushing portion 1213 is used for being linked with the latch assembly 11, so that the latch assembly 11 can drive the locking knob 121 to move by pushing the pushing portion 1213 when moving inside the outer shell 13.

In this embodiment, the connection of the lock knob 121 and the lock slider 123 may be achieved by providing a receiving groove in the lock slider 123 and disposing the dial arm 1212 in the receiving groove.

In a further specific embodiment, the deadbolt dial 122 includes a linkage portion 1221, a dial portion 1222 that mates with the deadbolt assembly 11, and a lock portion 1223 that mates with the second linkage member 125, one side of the linkage portion 1221 is connected to the lock dial 121, the other side is connected to the inner door handle or the outer door handle 20, the dial portion 1222 and the lock portion 1223 are disposed on a peripheral side of the linkage portion 1221, and an upper lock portion 1224 that mates with the first linkage member 124 is formed on the dial portion 1222.

In a specific embodiment, the lock assembly 12 further includes a positioning assembly 50, the positioning assembly 50 being capable of limiting the lock slide 123 in the locked state.

In a more specific embodiment, the positioning assembly 50 includes a connecting plate 51, a first spring 52 and a positioning member 53, the connecting plate 51 is connected with the housing 13, one end of the first spring 52 is connected with the connecting plate 51, the other end is connected with the positioning member 53, a limit groove 531 matched with the locking slider 123 is formed on one end of the positioning member 53 away from the connecting plate 51, and when the lock assembly 12 is in the locked state, the locking slider 123 abuts against the limit groove 531.

In a specific embodiment, the latch assembly 11 includes a latch 111, a mounting plate 112, a fixing plate 113 and a second spring 114, where the housing 13 is provided with a latch mounting hole, the latch 111 is disposed in the latch mounting hole, the latch 111 is connected with the mounting plate 112, the fixing plate 113 is fixedly connected with the housing 13, one end of the second spring 114 is connected with the mounting plate 112, the other end is connected with the fixing plate 113, and the mounting plate 112 is used to form a linkage relationship with the latch knob 122 and the latch knob 121.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The utility model provides an outside unlocking mechanism, its characterized in that includes outer door handle and unlocking member, outer door handle is used for being connected with the lock body of lock to be located the outside of the door body, be formed with the holding chamber on the outer door handle, the holding chamber to the side opening of outer door handle forms first butt joint hole, the unlocking member with rotatable mode set up in the holding chamber, be formed with the second butt joint hole on the unlocking member, when the lock body is in the locked state, first butt joint hole with the second butt joint hole aligns, through insert the mounting in first butt joint hole with the second butt joint hole, can make unlocking member with outer door handle realizes synchronous rotation.

2. The external unlocking mechanism of claim 1, further comprising a connecting assembly connected to the external door handle, the connecting assembly being movable relative to the external door handle under the action of an external force between a first position in which the connecting assembly is entirely located outside the second mating aperture to allow the unlocking member to freely rotate relative to the external door handle, and a second position in which the connecting assembly is partially located in the first mating aperture and partially located in the second mating aperture to allow the unlocking member to rotate in unison with the external door handle, the connecting assembly comprising the securing member.

3. The external unlocking mechanism according to claim 2, wherein the connecting component comprises a button and a spring, the button comprises a button cap and a straight rod connected with the button cap, the shape of the button cap is matched with the first butt joint hole, the spring is sleeved outside the straight rod, one end of the spring is connected with the button cap or the straight rod, and the other end of the spring is connected with the surrounding wall of the second butt joint hole; when the connecting assembly is positioned at the first position, the button cap is at least partially positioned outside the first butt joint hole, the straight rod is positioned outside the second butt joint hole, and the spring is in a natural state; when the connecting assembly is in the second position, the button cap is at least partially positioned in the first docking aperture, the straight rod is at least partially positioned in the second docking aperture, and the spring is compressed.

4. The external unlocking mechanism according to claim 2, wherein the connecting assembly comprises a connecting rod, the connecting rod is inserted into the first butt joint hole, a plurality of flanges are formed by protruding outwards from the outer periphery of the connecting rod, a plurality of grooves matched with the flanges are formed by concave surrounding walls of the first butt joint hole, the connecting rod is clamped with the first butt joint hole through the flanges and the grooves, and the flanges are matched with different grooves, so that the connecting rod can be switched between the first position and the second position.

5. The external unlocking mechanism according to any one of claims 1 to 4, wherein the external door handle includes a handle portion and a sleeve portion formed on the handle portion, the receiving cavity being formed on the sleeve portion.

6. The external unlocking mechanism according to claim 5, wherein the first mating hole is located on a projection surface of the handle portion on the sleeve portion such that the handle portion can form a barrier to the first mating hole when a user is looking at the external door handle.

7. A door lock, comprising: an external unlocking mechanism according to any one of claims 1 to 6, and a lock body and an internal door handle;

8. The door lock of claim 7, wherein the lock body further comprises a housing having a receiving space formed therein, the lock assembly being disposed in the receiving space, the latch bolt assembly being retractable into or extendable from the housing upon actuation of the lock assembly;

9. The door lock according to claim 8, wherein a first linkage member is provided on the lock knob, the first linkage member being located at an inner side of the lock knob such that the first linkage member is located on a movement path of the inside tongue knob, and is capable of contacting with the first linkage member when the inside tongue knob is rotated counterclockwise, thereby driving the lock knob to rotate counterclockwise;

10. The door lock according to claim 9, wherein the locking knob comprises an unlocking part, an unlocking hole matched with the unlocking piece is formed in the unlocking part, the unlocking piece is inserted into the unlocking hole, a poking arm and a pushing part are arranged on the periphery of the unlocking part, the poking arm is used for being connected with the locking sliding block, so that the locking knob can drive the locking sliding block to move, and the pushing part is used for being linked with the lock tongue assembly, so that the lock tongue assembly can drive the locking knob to move by pushing the pushing part when moving towards the inside of the shell;