CN217028431U - Plug-in door lock and lifting equipment with same - Google Patents

Abstract

The utility model provides a plug-in door lock and lifting equipment with the same, belonging to the technical field of lifting equipment, wherein the plug-in door lock comprises: the lock comprises a lock shell, a lock tongue and a locking piece, wherein the lock tongue and the locking piece are respectively and rotatably connected in the lock shell, and one end of the locking piece extends out of the inside of the lock shell to form an operating end; inserting the door hook into the lock shell and triggering the lock tongue to rotate until the door hook is hooked with the locking piece; applying force to the operating end to drive the locking piece connected with the operating end into a whole to rotate until the lock tongue and the locking piece are unhooked and automatically rotate to an unlocking position; according to the plug-in door lock, the door hook is locked through the lock tongue, the lock tongue is hooked through the locking piece, when unlocking is needed, the lock tongue can be unhooked through operating the operating end of the locking piece outside the lock shell, and therefore the lock tongue can unlock the door hook, the purpose of mechanical unlocking is achieved, and safety control of the door lock is improved.

Description

Plug-in door lock and lifting equipment with same

Technical Field

The utility model relates to the technical field of lifting equipment, in particular to a plug-in door lock and lifting equipment with the same.

Background

In jacking equipment technical field, jacking equipment's lock reliability is especially important, and the lock relates to staff's safety problem, and a simple reliable lock structure not only can save the processing cost, more can ensure staff's safety.

The insertion type door lock has the advantages of simple structure and convenient manufacture, however, when the existing insertion type door lock is used for lifting equipment, the reliability of safety control can not be ensured.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the present invention is to overcome the defect of poor reliability of safety control of the plug-in door lock in the prior art, so as to provide a plug-in door lock with simple and reliable structure and a lifting device with the same.

In order to solve the above technical problems, the present invention provides a plug-in door lock, comprising: a lock case;

the lock comprises a lock shell, a lock tongue, a lock piece and a lock handle, wherein the lock tongue and the lock piece are respectively connected in the lock shell in a rotating mode, and one end of the lock piece extends out of the inside of the lock shell to form an operating end;

inserting a door hook into the lock shell and triggering the lock tongue to rotate until the door hook is hooked with the locking piece;

and applying force to the operating end to drive the locking piece connected with the operating end into a whole to rotate until the lock tongue and the locking piece are unhooked and automatically rotate to an unlocking position.

Optionally, a microswitch is further arranged in the lock case, and the microswitch is used for being matched with the bolt to output an electric signal corresponding to the locking state or the unlocking state of the door lock when the door lock is switched between the locking state and the unlocking state.

Optionally, the micro switch has a trigger, a trigger end matched with the trigger is arranged on the lock tongue, and after the lock tongue rotates, the trigger end is correspondingly separated from or abutted to the trigger so as to correspondingly output an electrical signal corresponding to a lock locking state or an unlock state of the door lock.

Optionally, the lock case comprises a first half-shell and a second half-shell which are complementarily assembled, and a mounting space for mounting the lock tongue, the locking member and the micro switch is formed between the first half-shell and the second half-shell.

Optionally, the bolt and the locking piece are respectively rotatably connected in the lock shell through a spacer.

Optionally, both ends of the spacer abut against the inner walls of the corresponding first half-shell and second half-shell, and are connected to the first half-shell and second half-shell.

Optionally, a first elastic element and a second elastic element are further arranged in the lock case, one end of the first elastic element is hooked on the bolt, one end of the second elastic element is hooked on the locking element, and the other ends of the first elastic element and the second elastic element are respectively connected to the lock case.

Optionally, a first elastic element and a second elastic element are further arranged in the lock case, the first elastic element and the second elastic element are sleeved on corresponding spacer sleeves, one end of the first elastic element is hooked on the lock tongue, one end of the second elastic element is hooked on the locking element, and the other end of the first elastic element and the other end of the second elastic element are connected to the inner wall of the lock case.

Optionally, the device further comprises a push rod, one end of the push rod is connected to the operation end, and the other end of the push rod extends towards the operation direction.

The present invention also provides a lifting device comprising: the plug-in door lock of any one of the above aspects, and a door hook cooperating with the plug-in door lock.

The technical scheme of the utility model has the following advantages:

1. according to the plug-in door lock provided by the utility model, the door hook is locked through the lock tongue, and the lock tongue is hooked through the locking piece, when the door lock needs to be unlocked, the lock tongue can be unhooked by operating the operation end of the locking piece outside the lock shell, so that the lock tongue unlocks the door hook, the aim of mechanical unlocking is fulfilled, and the safety control of the door lock is improved.

2. The plug-in door lock provided by the utility model can directly trigger the micro switch when the bolt rotates, so that when the bolt locks or unlocks the door hook, the micro switch can provide reliable electric signals corresponding to the locking and unlocking states of the door lock.

3. The lifting equipment provided by the utility model has the advantages of any one of the above items because of adopting the plug-in door lock of any one of the above items. After the door plant was locked, the locking piece and then the unblock was stirred to the accessible.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a perspective view of one embodiment of a plug-in door lock provided in an embodiment of the present invention;

FIG. 2 is a front cross-sectional view of the plug-in door lock of FIG. 1;

FIG. 3 is a schematic view of the insertion-type door lock of FIG. 2 locking a hook;

fig. 4 is a schematic view of the insertion-type door lock of fig. 3 completing the locking of the hook.

Description of reference numerals:

1. a lock case; 2. a socket; 3. a door hook; 4. a latch bolt; 5. locking the opening; 6. a positioning end; 7. a trigger end; 8. a first elastic member; 9. a microswitch; 10. a trigger; 11. a locking member; 12. a hooking end; 13. an operation end; 14. mounting holes; 15. a second elastic member; 16. a push rod; 17. a first half shell; 18. a second half shell; 19. a first fastener; 20. a second fastener; 21. and a limiting nut.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

As shown in fig. 1 and fig. 2, the present embodiment provides a specific implementation of a plug-in door lock, including: the lock comprises a lock shell 1, wherein a bolt 4, a locking piece 11 and a microswitch 9 are arranged in the lock shell 1. The lock bolt 4 and the locking piece 11 are respectively rotatably connected in the lock shell 1, the door hook 3 is inserted into the lock shell and touches the lock bolt 4 to rotate towards the direction of the locking piece 11 until being hooked with the locking piece 11, and simultaneously the lock bolt 4 controls the micro switch 9 to output an electric signal corresponding to the locking state of the door lock, wherein one end of the locking piece 11 extends out of the lock shell 1 from the inside of the lock shell 1 to form an operation end 13, and the force is applied to the operation end 13 to drive the locking piece 11 which is connected with the operation end 13 into a whole to rotate towards the direction far away from the lock bolt 4 until the lock bolt 4 and the locking piece 11 are unhooked and automatically rotate to an unlocking position, and meanwhile the micro switch 9 is controlled to output an electric signal corresponding to the unlocking state of the door lock.

As shown in fig. 2, the lock shell 1 is provided with an insertion opening 2 for inserting the door hook 3, the depth of the insertion opening 2 is ensured not to exceed the maximum elastic force of the first elastic piece 8, and when the door hook 3 abuts against the bottom of the insertion opening 2, the lock tongue 4 is hooked with the locking piece 11, so that the lock tongue 4 is kept in a locking state for locking the door hook 3, and the door lock is further in a locking state. Namely, the insertion depth of the door hook 3 is limited through the insertion opening 2, so that the bolt 4 is prevented from being driven by the door hook 3 to rotate excessively during the process of inserting the door hook 3 into the door lock.

As shown in fig. 1 and 2, in the plug-in door lock according to the present embodiment, the lock case 1 includes a first half shell 17 and a second half shell 18 that are detachably connected, and an installation space for installing the lock tongue 4, the locking member 11, and the micro switch 9 is formed between the first half shell 17 and the second half shell 18. In an embodiment of the present invention, the first half-shell 17 and the second half-shell 18 are assembled complementarily, specifically, as shown in fig. 1, the top view of the first half-shell 17 is "U" shaped in the same view; the second half-shell 18 is "U" shaped in the left view, so that the first half-shell 17 and the second half-shell 18 can mutually compensate for the respective missing parts after assembly. Compared with the lock shell 1 formed by assembling in the prior art, the lock shell needs to be welded and sealed after all components of the lock shell are assembled, and the cavity formed by mutually complementary assembling of the two half shells forms good sealing, so that other sealing operations are not needed, and the lock shell is connected, so that the structure is simplified, and the assembling time is saved; in addition, the processing technology of each shell part is simple, and the manufacturing cost is low.

In addition, in the plug-in door lock provided by the embodiment, the lock case 1 can be made by bending a sheet metal part; in addition, in order to improve the installation accuracy, the lock shell can be manufactured and molded by adopting a mold. Because the plug-in door lock provided by the embodiment has few parts and higher requirement on the precision of the lock shell, the mould is best to be made into the shell, the cost is low, and the precision is high.

The lock tongue 4 is rotatably connected in the installation space of the lock shell 1 through a spacer bush, and two ends of the spacer bush are respectively abutted to the inner walls of the first half shell 17 and the second half shell 18. Specifically, two ends of the spacer are respectively provided with an internal thread, and the first half shell 17 and the second half shell 18 are respectively provided with a through hole at a position opposite to the end of the spacer. The first fastening element 19 is screwed into the internal thread of the spacer after passing through the through hole from the outside of the lock housing 1, so that the first half shell 17 and the second half shell 18 are fastened by the first fastening element 19, thereby reducing the number of fastening elements for fastening the first half shell 17 to the second half shell 18. The first fastening member 19 is preferably a screw having a nut at one end for engaging the outside of the lock housing. In addition, as a preferred embodiment, the through holes of the first half shell 17 and the second half shell 18 for passing through the first fastening members 19 may be stepped holes, and the first fastening members 19 are countersunk screws matched with the stepped holes, so that the nuts of the first fastening members 19 can be embedded into the stepped holes of the lock shell 1, thereby keeping the outer wall of the lock shell 1 flat.

In addition, as an alternative embodiment, the spacer has a through hole in its centre, and the first half-shell 17 and the second half-shell 18 have a through hole in each case at a position opposite to the end of the spacer. The first fastening piece 19 penetrates through the through hole on one side of the lock shell 1 and then penetrates out of the through hole on the other side, the middle of the first fastening piece 19 penetrates through the through hole of the spacer sleeve so as to connect the spacer sleeve, and the penetrating end of the first fastening piece 19 is fastened and connected through a nut. The first fastening member 19 is preferably a bolt having a nut at one end thereof for being snapped into the outer side of the lock housing.

In addition, as an alternative embodiment, one end of the spacer is connected with the inner wall of the first half shell 17 or the second half shell 18 by welding, the other end of the spacer abuts against the other inner wall of the lock shell, the abutting end of the spacer has an internal thread, and a first fastening member 19 passes through the through hole of the lock shell and is in threaded connection with the internal thread on the abutting end of the spacer, so as to fix the spacer and fasten the first half shell 17 and the second half shell 18.

In the utility model, the spacer bush is used as a connecting link between the first half shell 17 and the second half shell 18, thereby omitting partial connecting pieces, simplifying the installation and simplifying the overall structure of the door lock.

Simultaneously, the spacer can also act as the rotation axis of spring bolt 4 and locking piece 11 to make spring bolt 4 and locking piece 11 can rotate around the surface of spacer, not only be convenient for the location installation of spring bolt 4 and locking piece 11, can bear the moment of torsion of spring bolt 4 and locking piece 11 moreover, simple structure, low in manufacturing cost, the practicality is strong.

As shown in fig. 2, the latch tongue 4 has a locking notch 5, and the locking notch 5 is used for locking the door hook 3 inserted into the insertion opening 2. The bolt 4 is connected with a first elastic element 8, the bolt 4 is restored to an initial position unlocked with the door hook 3 by using the elastic force of the first elastic element 8, and the locking notch 5 of the bolt 4 faces the socket 2 at the moment. Specifically, first elastic component 8 can be the torsional spring, and the center cover of this torsional spring is established on the spacer sleeve of connecting spring bolt 4, and the one end hook of this torsional spring is hung on spring bolt 4, and the other end butt is on an inside wall of lock shell to when door hook 3 inserts lock drive spring bolt 4 and rotates, the torsional spring has the drive spring force of spring bolt 4 antiport. The position of the torsion spring sleeve on the spacer is not limited in particular, and the torsion spring sleeve can be located on the upper portion or the lower portion of the lock tongue 4.

In addition, as an alternative embodiment, the first elastic element 8 may also be a tension spring, one end of which is hooked on the bolt 4, and the other end of which is hooked on the lock case, for example: a connecting column for hooking one end of the extension spring can be arranged in the lock shell 1, and then one end of the extension spring is hooked on the connecting column, so that the extension spring provides elastic force for the bolt 4 to rotate reversely.

As shown in fig. 2, the locking member 11 is rotatably connected in the installation space of the lock case 1 through a spacer whose both ends are respectively abutted against the inner walls of the first half case 17 and the second half case 18. Specifically, two ends of the spacer are respectively provided with an internal thread, and the first half shell 17 and the second half shell 18 are respectively provided with a through hole at a position opposite to the end of the spacer. The second fastening member 20 is threaded into the internal thread of the spacer after passing through the through hole from the outside of the lock case 1, so that the first half case 17 and the second half case 18 are fastened by the second fastening member 20, thereby reducing the number of fastening members for fastening the first half case 17 and the second half case 18. Wherein said second fastening member 20 is preferably a screw having a nut at one end thereof for snapping into engagement with the outer side of the housing. In addition, as a preferred embodiment, the through holes of the first half shell 17 and the second half shell 18 for passing through the second fastening members 20 may be stepped holes, and the second fastening members 20 may be countersunk screws matched with the stepped holes, so that the nuts of the second fastening members 20 can be inserted into the stepped holes of the lock case 1, thereby keeping the outer wall of the lock case 1 flat.

In addition, as an alternative embodiment, the spacer has a through hole in its centre, and the first half-shell 17 and the second half-shell 18 have a through hole in each case at a position opposite to the end of the spacer. The second fastening piece 20 penetrates through the through hole on one side of the lock shell 1 and then penetrates through the through hole on the other side, the middle of the second fastening piece 20 penetrates through the through hole of the spacer sleeve so as to connect the spacer sleeve, and the penetrating end of the second fastening piece 20 is fastened and connected through a nut. Wherein said second fastening member 20 is preferably a bolt having a nut at one end thereof for snapping into engagement with the outside of the housing.

In addition, as an alternative embodiment, one end of the spacer is connected with the inner wall of the first half shell 17 or the second half shell 18 by welding, the other end of the spacer abuts against the other inner wall of the lock shell, the abutting end of the spacer is provided with an internal thread, and a second fastening member 20 is threaded through the through hole of the lock shell and is connected with the internal thread on the abutting end of the spacer, so that the spacer is fixed and the first half shell 17 and the second half shell 18 are fastened.

As shown in fig. 2 and 3, the locking member 11 has a hooking end 12 for hooking the locking tongue 4, and the locking tongue 4 has a positioning end 6 for cooperating with the hooking end 12. The locking piece 11 is connected with a second elastic piece 15, and the second elastic piece 15 has an elastic force for driving the locking piece 11 to rotate towards the direction for hooking the bolt 4. That is, when the locking member 11 is driven by the latch bolt 4 against the elastic force of the second elastic member 15, the second elastic member 15 has an elastic force that drives the hooking end 12 of the locking member 11 to rotate in a direction in which the positioning end 6 of the latch bolt 4 is hooked. Specifically, second elastic component 15 can be the torsional spring, and the centre bore cover of this torsional spring is established on the spacer of locking piece 11, and the one end hook of this torsional spring is hung on locking piece 11, and the other end butt is on the inside wall of lock shell to when spring bolt 4 rotates towards latched position and when 12 butts with the hook end of locking piece 11, second elastic component 15 has the drive the hook end 12 orientation of locking piece 11 the location end 6 pivoted elastic force of spring bolt. The position where the torsion spring is fitted on the spacer is not particularly limited, and may be located at an upper portion or a lower portion of the locking member 11.

In addition, when application of force is in operation end 13, realize removing the hook back with locking piece 11 and spring bolt 4, no longer continue to apply force to operation end 13, at this moment, locking piece 11 and spring bolt 4 correspond automatic rotation to the unblock position under the effect of the elastic force of second elastic component 15 and first elastic component 8 to reach the purpose of mechanical unlocking, with the safety control who improves the lock. In addition, as an alternative embodiment, the second elastic element 15 may also be a tension spring, one end of which is hooked on the locking element 11 and the other end of which is hooked on the lock case, for example: a connection post for hooking one end of the extension spring may be provided in the lock case 1 and then one end of the extension spring is hooked on the connection post, so that the extension spring provides the locking member 11 with an elastic force of reverse rotation.

As shown in fig. 3 and 4, when the latch bolt 4 rotates to the locking position, the locking member 11 will rotate clockwise under the action of the second elastic member 15, so that the hooking end 12 hooks the positioning end 6 of the latch bolt 4.

As shown in fig. 2, the microswitch 9 is used to directly cooperate with the bolt 4, when the bolt 4 rotates, the microswitch 9 can be directly controlled to transmit an electric signal, so as to provide reliable locking and unlocking confirmation signals for the safety control of the door lock. Specifically, the microswitch 9 is provided with a trigger 10, the bolt 4 is provided with a trigger end 7 for abutting against the trigger 10, when the bolt 4 is located at the unlocking position, the trigger end 7 is abutted against the trigger 10, so that the microswitch 9 is triggered to be in an electrified state, and an electrified signal is transmitted to a controller of the lifting device, so that the unlocking state of the bolt 4 in the door lock is monitored.

As shown in fig. 3, after the latch bolt 4 is driven by the door hook 3 to rotate, the trigger end 7 of the latch bolt 4 is separated from the trigger 10, and at this time, the micro switch 9 is in a power-off state and transmits a power-off signal to the controller of the lifting device, so as to monitor the locking state of the latch bolt 4 in the door lock. The distance from the positioning end 6 of the bolt 4 to the rotation center of the bolt 4 is greater than the distance from the triggering end 7 of the bolt 4 to the rotation center of the bolt 4. So set up, make spring bolt 4 sensitive, the simple structure of triggering of micro-gap switch 9 effective. Of course, the on-off signal for monitoring the unlocking state and the locking state of the door lock can be adjusted according to the working principle of the microswitch selected actually, that is, the microswitch 9 is in the off state corresponding to the unlocking state of the door lock, and the microswitch 9 is in the on state corresponding to the locking state of the door lock.

As shown in fig. 1, 2 and 4, the operating end 13 of the locking member 11 is provided with a mounting hole 14 for connecting a push rod 16, one end of the push rod 16 is connected in the mounting hole 14, and the other end of the push rod 16 extends towards the operating direction; when the push rod 16 is pushed in the operating position, the locking member 11 can be driven to rotate, so that the locking bolt 4 is unlocked.

In an embodiment of the present invention, the driving direction of the operation end 13 of the locking member 11 may be parallel to the insertion direction of the door hook 3. The operating end 13 is provided with a mounting hole 14 for connecting a push rod 16, the mounting hole 14 includes but is not limited to a long hole, a round hole and a polygonal hole, the push rod 16 is provided with a step structure for being clamped outside the mounting hole 14, specifically, as shown in fig. 4, taking the mounting hole 14 as a long hole as an example, the push rod 16 is connected with a limit nut 21, and the push rod is clamped outside the mounting hole 14 through the limit nut 21; when the push rod 16 is pressed downward, the locking member 11 rotates, and the push rod 16 does not rotate along with the locking member 11 but slightly displaces because the mounting hole 14 is a long hole. In addition, as an alternative embodiment, the push rod 16 may also be an elastic push rod capable of bending deformation, and since the displacement amount of the rotation when the locking member 11 is unlocked is relatively small, the push rod 16 can be ensured not to rotate along with the locking member 11 by slight bending deformation of the elastic push rod. Of course, the push rod 16 and the mounting hole 14 on the operation end 13 can also be fixedly connected, and will not be described in detail herein.

The installation of the plug-in door lock provided by the embodiment is simple, the plug-in door lock can be vertically attached to the installation surface, and then the plug-in door lock is fixedly installed by adopting a fastener, so that the installation is convenient and fast.

Example 2

The lifting device provided by the embodiment adopts the plug-in door lock in embodiment 1, and the door body equipped on the lifting device is in a locked state or an unlocked state. The installation position of the plug-in door lock in cooperation with the door body of the lifting device is not particularly limited, and no matter which installation mode is adopted, the plug-in door lock can be used as long as the door body can be smoothly locked and unlocked.

Taking the rolling door as an example, the door hook 3 matched with the insertion type door lock can be arranged on the door body of the rolling door, and the insertion type door lock can be arranged on the door frame.

When the roller shutter door needs to be locked, the door body is pulled downwards to drive the door hook 3 installed on the door body to move downwards until the door hook 3 approaches the plug-in door lock and is inserted into the plug-in door lock, and the door hook 3 presses the lock tongue 4 and drives the lock tongue to rotate inside the plug-in door lock until the lock tongue is hooked with the locking piece 11, so that the locking of the door body is completed. Meanwhile, the bolt 4 controls the microswitch 9 to output an electric signal (such as a disconnection signal) corresponding to the locking state of the door lock, so that an electric loop of the lifting equipment learns that the door body of the roller shutter door is in a closed state according to the electric signal of the microswitch, the lifting equipment can be instructed to carry out similar lifting operation, the installation performance and the reliability of the operation of the lifting equipment can be improved in the process, and accidents are avoided.

When the roller shutter door needs to be unlocked to open the door lock, the operation end 13 or the push rod 16 arranged on the operation end 13 is pressed to drive the locking piece 11 connected with the operation end 13 into a whole to rotate, so that the hook of the roller shutter door is released from the lock tongue 4, the lock tongue 4 automatically rotates to an unlocking state under the action of the first elastic piece 8, the roller shutter door is lifted up at the moment, the door hook 3 is pulled out of the plug-in type door lock, and the roller shutter door is unlocked and opened. Meanwhile, the bolt 4 controls the microswitch 9 to output an electric signal (such as a power-on signal) corresponding to the unlocking state of the door lock, so that an electric loop of the lifting device knows that the door body of the roller shutter door is in an opening state according to the electric signal of the microswitch, and the lifting device can limit other related operations, such as forbidding lifting of the lifting device and the like.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are intended to be within the scope of the present invention.

Claims (10)

1. A plug-in door lock, comprising: a lock case (1);

the lock bolt (4) and the locking piece (11) are respectively and rotatably connected in the lock shell (1), and one end of the locking piece (11) extends out of the inside of the lock shell (1) to form an operating end (13);

inserting a door hook (3) into the lock shell (1) and triggering the lock tongue (4) to rotate until the door hook is hooked with the locking piece (11);

and applying force to the operating end (13) to drive the locking piece (11) which is connected with the operating end (13) into a whole to rotate until the lock bolt (4) and the locking piece (11) are unhooked and automatically rotate to an unlocking position.

2. A plug-in door lock according to claim 1, characterized in that a microswitch (9) is arranged in the lock housing (1), which microswitch (9) is adapted to cooperate with the bolt (4) when the door lock is switched between the locked state and the unlocked state, and to output an electric signal corresponding to the locked state or the unlocked state of the door lock.

3. The plug-in door lock according to claim 2, characterized in that the microswitch (9) has a trigger (10), the latch tongue (4) is provided with an activation end (7) which is matched with the trigger (10), and after the latch tongue (4) rotates, the activation end (7) is correspondingly separated from or abutted against the trigger (10) so as to correspondingly output an electric signal corresponding to the locking state or the unlocking state of the door lock.

4. Plug-in door lock according to claim 2, characterized in that the lock housing (1) comprises a first half-shell (17) and a second half-shell (18) which are fitted complementarily, a mounting space being formed between the first half-shell (17) and the second half-shell (18) for mounting the locking bolt (4), the locking element (11) and the microswitch (9).

5. Plug-in door lock according to claim 4, characterized in that the bolt (4) and the locking element (11) are each rotatably connected in the lock housing (1) by means of a spacer.

6. Plug-in door lock according to claim 5, characterized in that the two ends of the spacer abut against the inner walls of the corresponding first half-shell (17) and second half-shell (18) and are connected to the first half-shell (17) and second half-shell (18).

7. Plug-in door lock according to claim 1, characterized in that a first spring (8) and a second spring (15) are arranged in the lock housing (1), one end of the first spring (8) being hooked onto the bolt (4), one end of the second spring (15) being hooked onto the locking element (11), the other ends of the first spring (8) and the second spring (15) being connected to the lock housing (1), respectively.

8. Plug-in door lock according to claim 5, characterized in that a first spring (8) and a second spring (15) are provided in the lock housing (1), the first spring (8) and the second spring (15) are arranged around the respective spacer, and one end of the first spring (8) is hooked on the bolt (4), one end of the second spring (15) is hooked on the locking element (11), and the other end of the first spring (8) and the second spring (15) is connected to the inner wall of the lock housing (1).

9. Plug-in door lock according to one of claims 1 to 8, characterized in that it further comprises a push rod (16), one end of the push rod (16) being connected to the operating end (13), the other end of the push rod (16) extending in the operating direction.

10. A lifting device, comprising: the plug-in door lock according to any one of claims 1 to 9, and a door hook (3) cooperating with the plug-in door lock.

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