CN109184367B

CN109184367B - Lock and debit system

Info

Publication number: CN109184367B
Application number: CN201810911732.4A
Authority: CN
Inventors: 徐熠
Original assignee: Shenzhen Dorabot Robotics Co ltd
Current assignee: Shenzhen Lan pangzi machine intelligence Co., Ltd
Priority date: 2018-08-10
Filing date: 2018-08-10
Publication date: 2020-06-12
Anticipated expiration: 2038-08-10
Also published as: CN109184367A

Abstract

The application discloses a lockset and debit system. The lockset comprises a lock block, a lock cylinder, a first key and a second key; when the first key is matched and connected with the lock cylinder, the second key is separated from the lock cylinder, the first key cannot be separated from the lock cylinder by itself, and the first key is separated from the lock cylinder only when the second key pushes the lock cylinder to swing to a set position; the second key has the same structure as the first key in connection with the lock cylinder, and the positions of the first key and the second key in the above description can be interchanged. By the above mode, the article borrowing registration can be completed efficiently at low cost.

Description

Lock and debit system

Technical Field

The present application relates to a lock, and more particularly to a lock and a debit system.

Background

In the existing goods borrowing environment, video monitoring and borrowing visiting registration are widely used and are used for managing return of tools or materials.

The existing video monitoring solves the scheme of borrowing and registering articles, so that the installation equipment and labor operation cost is obviously improved. High definition equipment is expensive, and video monitoring operation consumes electric power, if the phenomenon that article are not returned on time, need mobilize the manpower and investigate video monitoring, and this process consumes a large amount of manpower resources. Thus, the solution of managing the borrowing of goods through video monitoring is liable to cause scheduling difficulty of various resources and high cost. The borrowing visiting registration scheme can not avoid the omission phenomenon caused by forgetting registration of the borrower, so that the scheme is similar to a dummy scheme.

Disclosure of Invention

The application provides a lock and a debit system, which can effectively complete the borrowing registration of articles at low cost.

In order to solve the technical problem, the application adopts a technical scheme that: a lock is provided. The lock comprises a lock block, a lock core, a first key and a second key, wherein the lock block is provided with a through slot; the lock core is connected with the lock block in a limiting swinging mode, the lock core comprises a convex block and two limiting arms respectively connected to two side edges of the convex block, a limiting groove is formed between each limiting arm and the convex block, one end of each convex block always extends into the slot when the lock core is in the limiting swinging mode, and one limiting arm extends into the slot and the other limiting arm exits the slot when the lock core is in the limiting swinging mode to the limiting position; the first key and the second key respectively comprise a hook and buckle arm matched with the limiting groove and a hook and buckle groove matched with the limiting arm; the first key extends into the slot and is connected with the limiting groove and the limiting arm in a hooking manner through the hooking arm and the hooking groove; when the first key pushes the lug inwards, the lock cylinder swings; when the first key is pulled out of the slot, the first key cannot be separated from the lock cylinder because the hook arm, the hook groove, the limiting groove and the hook of the limiting arm are connected; the second key extends into the other end of the slot and pushes the bump, so that the lock cylinder swings to a set position, and the first key is directly drawn out or drawn out in a sliding mode.

In a possible implementation manner, the lock further includes a pivot member, the pivot member is used for pivotally connecting the lock cylinder and the lock block, and a pivot of the pivot member is located outside the slot.

In a possible implementation manner, the lock block is further provided with a hollow groove communicated with one side edge of the slot, and the lock cylinder is connected in the hollow groove in a limiting swing mode.

In a possible embodiment, the hollow groove includes two first groove walls, and the two first groove walls are respectively used for stopping the two limit arms, so that the lock cylinder is limited and swung to the limit position.

In a possible embodiment, the protrusion and the limiting arm form a connection in a shape like a Chinese character 'shan', the lock cylinder further includes a rotation stopping arm extending from the other end of the protrusion, and the hollow groove includes two second groove walls, each of which is used for stopping the rotation stopping arm, so that the lock cylinder is limited and swung to a limit position.

In a possible implementation manner, the locking block includes a first cover and a second cover that are connected in a snap-fit manner, the first cover is provided with the slot and the hollow-out groove, and the second cover is used for covering the slot and the hollow-out groove; or the first cover body and the second cover body are both provided with the slot and the hollow groove.

In a possible implementation manner, the first cover body comprises a cover plate, a first mounting plate and a second mounting plate, and the second mounting plate is partially hollowed and connected with the cover plate to form the hollowed groove; the first mounting plate is connected to the cover plate and arranged at an interval with the second mounting plate to form the slot.

In a possible implementation manner, one end of the hooking arm facing the projection is provided with a guide inclined plane, and the projection is provided with a pushing surface;

the guide inclined plane is used for abutting against the abutting surface to push the lock cylinder to swing; when the guide inclined plane is completely abutted against the abutting surface, the lock cylinder swings to a set position, so that the first key and the second key are in a state of being capable of being freely pulled out.

In a possible implementation manner, the limiting arm is provided with a sliding surface and a first arc surface, the sliding surface and the abutting surface are arranged at an angle, and the first arc surface is used for being hooked and connected with the hooking and buckling arm;

when the lock cylinder swings to the middle position, the intersecting line of the sliding surface and the first arc surface is located outside the slot, the hook-and-loop arm of one of the first key and the second key is pulled outwards and slides out along the sliding surface to drive the lock cylinder to swing, so that the other of the first key and the second key is hooked and connected with the lock cylinder.

In order to solve the above technical problem, another technical solution adopted by the present application is: a debit system is provided. The debit system includes a lock as described above.

The beneficial effect of this application is: different from the situation of the prior art, the lock and the debit system are provided, the through slot is formed in the lock block, and the convex block of the lock cylinder always extends into the slot so as to be conveniently pushed by the first key or the second key; the two sides of the bump are respectively provided with a limiting arm, a limiting groove is formed between the limiting arm and the bump, and the first key and the second key respectively comprise a hook-and-loop arm matched with the limiting groove and a hook-and-loop groove matched with the limiting arm; when a second key is hooked with the lock cylinder and the first key pushes the lug inwards to a set position, the limiting arm hooked with the second key exits from the hook groove, and the second key is in a free state and can be pulled out of the lock block; when the second key is drawn out, the first key is connected with the lock cylinder in a hooking mode; when the first key is pulled out of the slot, the lock cylinder cannot swing due to the hooking connection of the hooking arm, the hooking slot, the limiting slot and the limiting arm; furthermore, after the first key is hooked with the lock cylinder, the first key is locked by the lock cylinder, the first key cannot be separated from the lock cylinder by itself, and the first key can be separated from the lock cylinder only when the second key pushes the lock cylinder to swing to a set position. The utility model provides a tool to lock simple structure, preparation low cost need not to consume the operation cost simultaneously, and its first key and second key one of the two subsidiary borrower information, another person with by borrowing article and be connected, and then when the borrower borrows article, the identity information of borrower is detained on the tool to lock, can conveniently, accomplish article and borrow the registration efficiently, is convenient for look up the borrower information of being borrowed article.

Drawings

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

FIG. 1 is a schematic structural diagram of a lock according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of the internal structure of the lock of FIG. 1 in a first state;

FIG. 3 is a schematic view of the internal structure of the lock of FIG. 1 in a second state;

FIG. 4 is a third state diagram of the internal structure of the lock of FIG. 1;

FIG. 5 is a schematic view of the lock core of the lock shown in FIG. 1;

FIG. 6 is a schematic view of the first and second keys of the lock of FIG. 1;

FIG. 7 is a first structural schematic diagram of a first cover of the lock shown in FIG. 1;

FIG. 8 is a second structural diagram of the first cover of the lock of FIG. 1;

FIG. 9 is a third structural view of the first cover of the lock of FIG. 1;

fig. 10 is a schematic structural diagram of a debit system provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.

The terms "first" and "second" in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a lock according to an embodiment of the present disclosure.

Referring to fig. 1 to 6 in combination, the lock includes a lock block 10, a lock cylinder 20, a first key 30 and a second key 40. When the first key 30 is connected with the lock cylinder 20 in a matching manner, the second key 40 is separated from the lock cylinder 20, the first key 30 cannot be separated from the lock cylinder 20 by itself, and the first key 30 is separated from the lock cylinder 20 only when the second key 40 pushes the lock cylinder 20 to swing to a set position. The set position is, for example, a limit position of the lock cylinder 20 during pivoting or an intermediate position of the lock cylinder 20 during pivoting. The second key 40 has the same structure as the first key 30 in connection with the key cylinder 20, and the positions of the first key 30 and the second key 40 can be interchanged in the above description.

In particular, the locking piece 10 is provided with a through slot 11. The lock core 20 is connected to the lock block 10 in a limited swinging manner, that is, the lock block 10 is provided with a limiting structure for limiting the swinging range of the lock core 20, for example, the lock block 10 is provided with a limiting column, a limiting groove and other structures, and the lock core 10 swings in the range limited by the limiting column or the limiting groove.

The lock core 20 includes a protrusion 22 and two position-limiting arms 24 respectively connected to two sides of the protrusion 22, and a position-limiting groove 23 is formed between the position-limiting arms 24 and the protrusion 22. One end of the convex block 22 always extends into the slot 11 when the lock cylinder 20 is in limited swing rotation, and then the first key 30 and the second key 40 can always push the lock cylinder 20 to swing. When the lock cylinder 20 is rotated to the limit position, one of the two limit arms 24 extends into the slot 11 and the other one exits the slot 11.

The first key 30 and the second key 40 each include a hooking arm 33 matching the stopper groove 23, and a hooking groove 34 matching the stopper arm 24. The first key 30 extends into the slot 11 and is hooked and connected with the limiting groove 23 and the limiting arm 24 through the hooking arm 33 and the hooking groove 34.

Referring to fig. 2 to 4, the second key 40 is hooked to the key cylinder 20, and the key cylinder 20 is located at the right limit position. When the first key 30 pushes the protrusion 22 into the slot 11, the key cylinder 20 is swung to a set position, so that the hooking arm 33 and the hooking groove 34 of the second key 40 are separated from the corresponding limiting groove 23 and the limiting arm 24, and the second key 40 is in a free state and can be pulled out from the other end of the slot 11. In the process of withdrawing the second key 40, the lock cylinder 20 is driven to swing to the left limit position, so that the hooking arm 33 and the hooking groove 34 of the first key 30 are hooked and connected with the limiting groove 23 and the limiting arm 24. When the first key 30 is pulled out of the slot 11, the first key 30 cannot be separated from the key cylinder 20 due to the hooking connection of the hooking arm 33 and the hooking groove 34 with the limiting groove 23 and the limiting arm 24. Further, when the first key 30 is hooked to the key cylinder 20, the first key 30 is locked to the key cylinder 20, and the first key 30 cannot be separated from the key cylinder 20 by itself. The second key 40 extends into and pushes the projection 22 at the other end of the slot 11, so that the lock cylinder 20 swings to a set position, and the first key 30 is extracted. The second key 40 is hooked to the key cylinder 20 while the first key 30 is withdrawn.

In this embodiment, the setting position is taken as an intermediate position for example. The neutral position is a neutral swing region including a center position of a swing range of the key cylinder 20.

Referring to fig. 2 to 4, the first key 30 extends into one end of the slot 11 to push the protrusion 22, so that the lock cylinder 20 swings to the middle position, the second key 40 is separated from the lock cylinder 20 and is in a free state, and the second key 40 can be drawn out from the other end of the slot 11. In the process of extracting the second key 40, the lock cylinder 20 is driven to swing to the left limit position, and the first key 30 is locked.

If the first key 30 and the second key 40 are further provided with a pushing structure, such as a pushing column, the pushing structure constantly acts on one end of the protruding block 22 away from the limit swing center when pushing the protruding block 22, so that the lock core 22 can swing to the limit position, meanwhile, the first key 30 is hooked with the lock core 20, the second key 40 is separated from the lock core 20 and can be directly pulled out, and meanwhile, the lock core 20 locks the first key 30.

With continued reference to fig. 2, the lock block 10 further includes a pivot 12, the pivot 12 is used to pivot the lock cylinder 20 to the lock block 10, and the pivot of the pivot 12 is located outside the slot 11, so that the first key 30 and the second key 40 can push the lock cylinder 20 to swing. The pivot 12 may be fixedly or rotatably connected to the body of the lock 10, but is not limited in this application.

The pivot 12 is, for example, a rivet or a screw. The protrusion 22 is provided with a pivot hole 220 for receiving the pivot 12 to pass through, so that the pivot 12 pivots the lock core 20 to the lock block 10, and the protrusion 22 swings around the pivot center of the pivot 12 relative to the lock block 10. Or, the pivot 12 is a damping rotating shaft, and the lock block 10 and the lock cylinder 20 can perform damping limiting swing relatively, so that the lock cylinder 20 rotates more stably relative to the lock block 10, and the lock cylinder 20 has better performance to cope with the impact of external force. The pivot 12 may be other connecting members, which is not limited in this application.

Referring to fig. 2, 5 and 7, the lock block 10 further has a hollow groove 13 communicating with one side of the slot 11, and the lock core 20 is connected in the hollow groove 13 in a limited swinging manner, that is, the pivot of the pivot 12 is located in the hollow groove 13, and one end of the protrusion 22 is extended into the slot 11 all the time.

For example, the hollow-out groove 13 is in a shape of a "convex" and includes two first groove walls 130, and the two first groove walls 130 are respectively used for stopping the two limiting arms 24, so that the lock cylinder 20 is limited and swung between two limiting positions.

The bump 22 and the limiting arm 24 form a connection in a shape like a Chinese character 'shan', the lock cylinder 20 further includes a rotation stopping arm 26 extending from the other end of the bump 22, the hollow groove 13 includes two second groove walls 132, and the two second groove walls 132 are respectively used for stopping the rotation stopping arm 26, so that the lock cylinder 20 is limited to swing between two limit positions. The second slot wall 132 is connected to the corresponding first slot wall 130, that is, when the lock core 20 swings to the limit position, the limiting arm 24 is stopped on the corresponding first slot wall 130, and the rotation stopping wall 26 is stopped on the second slot wall 132, or the rotation stopping arm 26 is stopped before the limiting arm 24, so that the limiting arm 24 can be protected from the impact force caused by the stop, and the service life of the lock is prolonged.

Referring to fig. 8, in another embodiment, the inside of the lock block 10 is a hollow structure, and the position-limiting post 14 is disposed inside the lock block 10, and the position-limiting post 14 has a first slot wall 130 and a second slot wall 132. Furthermore, the internal structure of the lock block 10 may be various, as long as the first groove wall 130 and the second groove wall 132 exist therein to limit the swing range of the lock cylinder 20, and the application does not limit the internal structure of the lock block 10.

Referring to fig. 5, the position limiting arm 24 includes a connecting portion 240 and an inserting portion 242, the connecting portion 240 connects the protrusion 22 and the inserting portion 242 at intervals, and the inserting portion 242 matches with the hooking groove 34; the insertion part 242, the connection part 240 and the projection 22 form a limiting groove 23.

Specifically, one side of the bump 22 facing the limiting groove 23 includes a pushing surface 223 and a first stopping surface 221, which are connected to each other, the connecting portion 240 has a second stopping surface 241, the inserting portion 242 has a first arc surface 243, the first stopping surface 221, the second stopping surface 241 and the first arc surface 243 are sequentially connected to form the limiting groove 23 matched with the hooking arm 33, and the first arc surface 243 is further used for hooking and connecting with the hooking arm 33.

Referring to fig. 3, 5 and 6, the end of the hooking arm 33 facing the protrusion 22 is provided with a guiding inclined surface 330, the first key 30 pushes the lock core 20 from the insertion slot 11, and the guiding inclined surface 330 abuts against the abutting surface 223 for pushing the lock core 20 to swing. When the guiding inclined surface 330 completely abuts against the abutting surface 23, the lock cylinder 20 swings to a set position, for example, a middle position, so that both the first key 30 and the second key 40 are in a freely extractable state. That is, when the guiding inclined plane 330 abuts against the abutting surface 223 in parallel, the lock cylinder 20 swings to the middle position, the hooking arm 33 aligns with the limiting groove 23, and both the first key 30 and the second key 40 are in the state of being able to be freely pulled out. Then, the second key 40 is pulled out from the slot 11 to drive the key cylinder 20 to swing to the left limit position, the hooking arm 33 is engaged with the limiting groove 23, and the insertion portion 242 is engaged with the hooking groove 34 to form hooking connection, so that the key cylinder 20 locks the first key 30.

Referring to fig. 4 to 6, when the hooking arm 33 is engaged with the limiting groove 23, the guiding inclined surface 330 is parallel to the first stopping surface 221, and the first stopping surface 221 has a stopping function for the guiding inclined surface 330. The inserting portion 242 further has a second arc surface 244 and a sliding surface 245, the second arc surface 244 is concentrically arranged with the first arc surface 243, so that the inserting portion 242 is inserted into the hook groove 34, and the hook arm 33 is inserted into the limiting groove 23, so that the first key 30 or the second key 40 forms a hook connection with the lock cylinder 20. And the sliding surface 245 and the pushing surface 223 are disposed at an angle to form a trumpet-shaped channel, so that the hooking arm 33 is inserted into the limiting groove 23 through the trumpet-shaped channel. The shape and structure of the lock cylinder 20 are schematically described herein, and the present application does not impose any restrictions on the specific shape and structure of the lock cylinder 20.

Referring to fig. 3 and 5, the schematic diagram of the internal structure of the lock in the second state, the second arc surface 244 abuts against the arc-shaped wall portion of the hooking groove 34, and the first key 30 is restricted from continuously pushing the lock cylinder 20 toward the pivot hole 220. That is, in this embodiment, the first key 30 or the second key 40 can only push the lock cylinder 20 to the middle position, and then the lock cylinder 20 needs to be continuously driven to rotate to the key-locked state by means of pulling the first key 30 or the second key 40 outwards.

When the guiding inclined surface 330 completely abuts against the abutting surface 223, the lock core 20 swings to the set position, and the second arc surface 244 abuts against the arc-shaped wall portion of the hooking groove 34 to limit the guiding inclined surface 330 from continuously pushing the abutting surface 223. At this time, the intersection line of the sliding surface 245 and the first arc surface 243 is located outside the slot 11, the first key 30 and the second key 40 are both in a state of being capable of being freely pulled out, the hooking arm 33 of one of the first key 30 and the second key 40 is pulled out to the slot and slides along the sliding surface 245, the lock cylinder 20 is driven to swing, so that the other of the first key 30 and the second key 40 is hooked with the lock cylinder 20 and is then locked by the lock cylinder 20.

Referring to fig. 7 to 9, the locking block 10 includes a first cover 15 and a second cover 16 that are connected in a snap-fit manner, the first cover 15 has a slot 11 and a hollow slot 13, and the second cover 16 is used for covering the slot 11 and the hollow slot 13; or the first cover body 15 and the second cover body 16 are both provided with the slot 11 and the hollow-out groove 13. When the lock is assembled, one of the first key 30 and the second key 40 must be hooked with the lock cylinder 20 and simultaneously packaged in the lock block 10, and the other key can be used for pushing the lock cylinder 20 to swing to the middle position from the slot 11.

Referring to fig. 9, the first cover body 15 includes a cover plate 150, a first mounting plate 152, and a second mounting plate 154. The cover plate 150 is, for example, a flat plate structure, the second mounting plate 154 is partially hollow, and the second mounting plate 154 is aligned and connected with one end of the cover plate 150 to form a hollow groove 13; the first mounting plate 152 is, for example, a flat plate structure, the first mounting plate 152 is connected to the other end of the cover plate 150, and a gap is left between the first mounting plate 152 and the second mounting plate 154, so that the first mounting plate 152, the second mounting plate 154 and the cover plate 150 cooperate to form the slot 11. The second cover 16 may have the same structural features as the first cover 15, or the second cover 16 may have only a flat plate-like structure. The first cover body 15 is designed in a split type, so that the manufacturing process is simplified, and the material is saved, so that the cover plate 150, the first mounting plate 152 and the second mounting plate 154 can be rapidly produced in batches by adopting a stamping process. Similarly, the second cover 16, the lock cylinder 20, the first key 30 and the second key 40 are all suitable for rapid mass production using a stamping process.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a debit system according to an embodiment of the present application.

The debit system includes a latch 100 as described above. The first key 30 carries identification information of the borrower, and the second key 40 is connected with the object.

For example, the debit system comprises a tool rack 200, a plurality of locks 100 are fixedly connected to the tool rack 200, a second key 40 of each lock 100 is connected to a tool, and the second key 40 is hooked to the lock cylinder 20. When the borrower needs the instrument of borrowing, the borrower will be attached to have the first key 30 of its personal identity information to push away lock core 20 to the intermediate position through slot 11 for second key 40 is in free state, and second key 40 is taken out from the slot 11 other end, drives lock core 20 swing to extreme position, thereby first key 30 forms the hook with lock core 20 and is connected, and lock core 20 dies first key 30. The second key 40 is pulled out from the key cylinder 20 to borrow a tool connected to the second key 40, and the information of the borrower is retained in the lock 100, so that the information on the first key 30 can clearly and clearly refer to who borrows the tool, and the process of recording the borrowing of articles by means of manual registration, video monitoring and the like is omitted.

Different from the situation of the prior art, the lock and the debit system are provided, the through slot is formed in the lock block, and the convex block of the lock cylinder always extends into the slot so as to be conveniently pushed by the first key or the second key; the two sides of the bump are respectively provided with a limiting arm, a limiting groove is formed between the limiting arm and the bump, and the first key and the second key respectively comprise a hook-and-loop arm matched with the limiting groove and a hook-and-loop groove matched with the limiting arm; when a second key is hooked with the lock cylinder and the first key pushes the lug inwards to a set position, the limiting arm hooked with the second key exits from the hook groove, and the second key is in a free state and can be pulled out of the lock block; when the second key is drawn out, the first key is connected with the lock cylinder in a hooking mode; when the first key is pulled out of the slot, the lock cylinder cannot swing due to the hooking connection of the hooking arm, the hooking slot, the limiting slot and the limiting arm; furthermore, after the first key is hooked with the lock cylinder, the first key is locked by the lock cylinder, the first key cannot be separated from the lock cylinder by itself, and the first key can be separated from the lock cylinder only when the second key pushes the lock cylinder to swing to a set position. The utility model provides a tool to lock simple structure, preparation low cost, its first key and the subsidiary borrower information of second key in the two, another person with borrow article and be connected, and then when the borrower borrows article, the identity information of borrower is detained on the tool to lock, can conveniently, accomplish article and borrow the registration efficiently, is convenient for look up the borrower information of being borrowed article.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims

1. A lock, comprising:

the locking block is provided with a through slot;

the lock core is connected with the lock block in a limiting swinging mode and comprises a convex block and two limiting arms respectively connected to two side edges of the convex block, a limiting groove is formed between the limiting arms and the convex block, one end of the convex block always extends into the slot when the lock core is in the limiting swinging mode, one limiting arm extends into the slot when the lock core is in the limiting swinging mode and the other limiting arm exits from the slot when the lock core is in the limiting swinging mode to the limiting position;

the first key and the second key respectively comprise a hook and buckle arm matched with the limiting groove and a hook and buckle groove matched with the limiting arm;

the first key extends into the slot and is connected with the limiting groove and the limiting arm in a hooking mode through the hooking arm and the hooking groove;

when the first key pushes the lug into the slot, the lock cylinder swings;

when the first key is pulled out of the slot, the first key cannot be separated from the lock cylinder due to the hooking connection of the hooking arm, the hooking groove, the limiting groove and the limiting arm;

the other end of the slot is provided with the second key, the second key extends into the other end of the slot and pushes the lug, so that the lock cylinder swings to a set position where the first key can be taken out, the first key is further taken out, and when the first key is taken out, the second key is connected with the lock cylinder in a hooking mode.

2. The lock according to claim 1, further comprising a pivot member for pivotally connecting the lock cylinder to the lock block, the pivot of the pivot member being located outside the slot.

3. The lock according to claim 1, wherein the lock block is further provided with a hollow groove communicated with one side of the slot, and the lock cylinder is connected in the hollow groove in a limiting and swinging manner.

4. The lock according to claim 3, wherein the hollow-out groove comprises two first groove walls, and the two first groove walls are respectively used for stopping the two limiting arms so as to limit the rotation of the lock cylinder to the limit position.

5. The lock according to claim 4, wherein the protrusion and the position-limiting arm form a chevron-shaped connection, the lock cylinder further comprises a rotation-stopping arm extending from the other end of the protrusion, and the hollow groove comprises two second groove walls for stopping the rotation-stopping arm, respectively, so that the lock cylinder can be rotated to a limit position in a limited manner.

6. The lock according to claim 5, wherein the locking block comprises a first cover body and a second cover body which are connected in a buckling manner, the first cover body is provided with the slot and the hollow-out groove, and the second cover body is used for covering the slot and the hollow-out groove; or the first cover body and the second cover body are both provided with the slot and the hollow groove.

7. The lockset of claim 6 wherein said first cover includes a cover plate, a first mounting plate and a second mounting plate, said second mounting plate being partially hollowed out to connect with said cover plate to form said hollowed out slot; the first mounting plate is connected to the cover plate and arranged at an interval with the second mounting plate to form the slot.

8. The lock according to claim 1, wherein one end of the hooking arm facing the projection is provided with a guiding inclined surface, and the projection is provided with a pushing surface;

the guide inclined plane is used for abutting against the abutting surface to push the lock cylinder to swing; when the guide inclined plane is completely abutted to the abutting surface, the lock cylinder swings to the middle position of the swing range of the lock cylinder, so that the first key and the second key are in a state of being freely pulled out, and when one of the first key and the second key is pulled out, the other key is connected with the lock cylinder in a hooking mode.

9. The lockset of claim 8 wherein said retaining arm has a sliding surface angled from said push-against surface and a first arcuate surface for hooking engagement with said hooking arm;

when the lock cylinder swings to the middle position, the intersecting line of the sliding surface and the first arc surface is located outside the slot, the hook arm of one of the first key and the second key is pulled out of the slot and slides along the sliding surface to drive the lock cylinder to swing, so that the other of the first key and the second key is hooked and connected with the lock cylinder.

10. A debit system, comprising the lock of any one of claims 1-9;

the first key is provided with identity information of a borrower, and the second key is connected with an article.