Multifunctional lock

Abstract

The utility model discloses a multifunctional lock which comprises a lock shell, a handle assembly and a transmission assembly, and an inclined tongue and a square tongue are arranged on the lock shell in a sliding mode. The handle assembly is rotationally connected to the lock shell and connected with a first driving piece and a second driving piece, the first driving piece is used for driving the dead bolt to retract, and the second driving piece is used for driving the dead bolt to stretch out. The transmission assembly is rotationally connected to the lock shell and comprises a first transmission piece and a second transmission piece which are stacked up and down, the dead bolt is connected with the first transmission piece and the second transmission piece, the first transmission piece is provided with a first screw, and when the handle assembly rotates clockwise, the first driving piece abuts against the first screw to push the dead bolt to retract, and when the handle assembly rotates anticlockwise, the second driving piece abuts against the second screw to push the dead bolt to retract. The second driving piece abuts against the second transmission piece to push the dead bolt to stretch out. The second driving piece is provided with a screw hole used for containing a second screw, the second screw penetrates through the lock shell and is inserted into the screw hole, and switching of the quick unlocking function and the quick locking function is achieved through disassembly / assembly of the first screw and the second screw.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, and in particular to a multifunctional lock. Background Technology

[0002] In the field of lock technology, traditional locks are typically single-function, requiring cumbersome steps for locking and unlocking. This is especially problematic in emergencies such as fires or earthquakes, where rapid escape is crucial. Traditional locks often fail to meet the need for quick unlocking, potentially delaying escape and posing a threat to lives. Furthermore, in high-security environments, traditional locks also cannot provide a fast and reliable locking function to effectively prevent unauthorized intrusion.

[0003] Existing locks often require complex structural adjustments or professional tools to switch functions, which is difficult for ordinary users to do themselves, causing great inconvenience. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a multi-functional lock capable of switching between multiple functions, reducing production costs and manufacturing difficulty, while improving the reliability and stability of the lock.

[0005] A multi-functional lock according to a first aspect of the present invention includes a lock shell, a handle assembly, and a transmission assembly. The lock shell is slidably provided with a bolt and a latch. The handle assembly is rotatably connected to the lock shell and is connected to a first drive plate and a second drive plate, which are stacked vertically. The first drive plate is used to retract the latch, and the second drive plate is used to extend the latch. The transmission assembly is rotatably connected to the lock shell and includes a first transmission plate and a second transmission plate stacked vertically. The latch is connected to the first transmission plate and the second transmission plate. The first transmission plate is provided with a first screw. When the handle assembly rotates clockwise, the first drive plate abuts against the first screw and drives the first transmission plate to rotate counterclockwise, thereby pushing the latch to retract and achieving a quick unlocking escape function. When the handle assembly rotates counterclockwise, the second drive plate abuts against the second transmission plate and drives the second transmission plate to rotate clockwise, thereby pushing the latch to extend and achieving a quick locking function. The second drive plate is provided with a screw hole for accommodating the second screw. The second screw passes through the lock housing and is inserted into the screw hole to restrict the rotation of the second drive plate. The removal / installation of the first screw and the second screw enables the switching between quick unlocking and quick locking functions.

[0006] The multi-functional lock according to the embodiments of this utility model has at least the following beneficial effects: Through the cooperative design of the first screw, the second screw, the first drive plate, and the second drive plate, in an emergency, the user only needs to turn the handle assembly clockwise, and the first drive plate abuts against the first screw to drive the first transmission plate to rotate, thereby realizing the quick unlocking and escape function of retracting the latch; when locking is required, the handle assembly is turned counterclockwise, and the second drive plate abuts against the second transmission plate and drives the second transmission plate to rotate, thereby realizing the quick locking function of extending the latch, greatly improving the convenience and security of the lock. Furthermore, through the disassembly / assembly of the first screw and the second screw, four different working modes can be achieved, allowing the user to flexibly switch the lock's functional state according to actual usage scenarios and security needs. For example, in ordinary usage scenarios, the first screw can be installed to achieve the quick unlocking function, while the user can choose whether to install the second screw to control the quick locking function according to security needs; in special security protection scenarios, the first screw can be removed and the second screw installed, putting the lock in a relatively "locked" quick function state, effectively improving security. This multi-functional lock features a simple overall structure. It achieves multiple functions by simply setting a first screw on the transmission assembly and a screw hole on the second drive plate to accommodate the second screw. This reduces production costs and manufacturing difficulty, while improving the reliability and stability of the lock and reducing the failure rate caused by complex structures.

[0007] According to some embodiments of the present invention, a first driving plate is provided on the side of the first driving plate facing the first transmission plate, and the first driving plate extends into the upper side of the first transmission plate to abut against the first screw.

[0008] According to some embodiments of the present invention, a second driving protrusion is provided on the side of the second driving plate facing the second transmission plate, and the second driving protrusion is used to abut against the second transmission plate.

[0009] According to some embodiments of the present invention, the square tongue is provided with a first driving groove and a second driving groove in sequence along its length direction. The first transmission plate is provided with a first pin inserted into the first driving groove, and the second transmission plate is provided with a second pin inserted into the second driving groove. The first pin and the second pin respectively abut against the first driving groove and the second driving groove, so as the square tongue is driven to retract or extend as the first transmission plate and the second transmission plate rotate.

[0010] According to some embodiments of the present invention, the first drive groove is an arc-shaped groove that curves outward toward the outer side of the lock housing, and the second drive groove is an elongated groove arranged along the moving direction of the square tongue.

[0011] According to some embodiments of the present invention, the first driving plate is provided with a third driving protrusion, and the oblique tongue is provided with a first limiting plate and a second limiting plate along the moving direction. A limiting groove for accommodating the third driving protrusion is provided between the first limiting plate and the second limiting plate. When the handle assembly rotates clockwise, the third driving protrusion abuts against the second limiting plate and drives the oblique tongue to retract.

[0012] According to some embodiments of the present invention, the first limiting plate is connected to a reset spring, and the other end of the reset spring is connected to the oblique tongue.

[0013] According to some embodiments of the present invention, the lock housing is provided with a limiting torsion spring, the second transmission plate is provided with a limiting hole, and the limiting torsion spring passes through the limiting hole and is connected to the second transmission plate so that the square tongue is kept in an extended or retracted state.

[0014] According to some embodiments of the present invention, the first drive plate is provided with a limiting protrusion, which can abut against the first limiting plate to limit the rotation angle of the handle assembly.

[0015] According to some embodiments of the present invention, the lock shell is provided with a lock cylinder, the lock cylinder is provided with a third drive plate, and the third drive plate is connected to and drives the square tongue to extend or retract.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 This is a schematic diagram of the locked state of the multifunctional lock according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the unlocked state of the multifunctional lock according to an embodiment of the present invention.

[0020] Reference numerals: Lock case 100; Slanted latch 110; First limiting plate 111; Second limiting plate 112; Limiting groove 113; Return spring 114; Square latch 120; First drive groove 121; Second drive groove 122; Limiting torsion spring 123; Handle assembly 200; First drive plate 210; First drive protrusion 211; Third drive protrusion 212; Limiting protrusion 213; Second drive plate 220; Screw hole 221; Transmission assembly 300; First transmission plate 310; First screw 311; First pin 312; Second transmission plate 320; Second drive protrusion 321; Second pin 322; Limiting hole 323; Lock cylinder 400; Third drive plate 410. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of these terms in this utility model based on the specific content of the technical solution. In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In the description of this specification, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] Reference Figure 1 and Figure 2This utility model proposes a multifunctional lock, including a lock shell 100, a handle assembly 200, and a transmission assembly 300. The lock shell 100 is slidably provided with a bolt 110 and a bolt 120. The handle assembly 200 is rotatably connected to the lock shell 100 and is connected to a first drive plate 210 and a second drive plate 220. The first drive plate 210 and the second drive plate 220 are stacked one on top of the other. The first drive plate 210 is used to drive the bolt 120 to retract, and the second drive plate 220 is used to drive the bolt 120 to extend. The transmission assembly 300 is rotatably connected to the lock housing 100 and includes a first transmission plate 310 and a second transmission plate 320 stacked vertically. A square tongue 120 connects the first transmission plate 310 and the second transmission plate 320. The first transmission plate 310 is provided with a first screw 311. When the handle assembly 200 rotates clockwise, the first drive plate 210 abuts against the first screw 311 and drives the first transmission plate 310 to rotate counterclockwise, thereby pushing the square tongue 120 to retract and realizing the escape function of quick unlocking. When the handle assembly 200 rotates counterclockwise, the second drive plate 220 abuts against the second transmission plate 320 and drives the second transmission plate 320 to rotate clockwise, thereby pushing the square tongue 120 to extend and realize the quick locking function. The second drive plate 220 is provided with a screw hole 221 for accommodating the second screw. The second screw passes through the lock housing 100 and is inserted into the screw hole 221 to limit the rotation of the second drive plate 220. The removal / installation of the first screw 311 and the second screw realizes the switching between the quick unlocking function and the quick locking function.

[0026] It is understood that the multifunctionality proposed in this utility model includes at least four functions, namely:

[0027] Example 1: Installation of the first screw 311 and the second screw. The multi-functional lock of this example includes a lock housing 100, within which a latch 110 and a square latch 120 are slidably disposed. A handle assembly 200 is rotatably connected to the lock housing 100, and a first drive plate 210 and a second drive plate 220, stacked vertically, are connected thereon. The first drive plate 210 is used to retract the square latch 120, and the second drive plate 220 is used to extend the square latch 120. A transmission assembly 300 is also rotatably connected to the lock housing 100, and consists of a first transmission plate 310 and a second transmission plate 320 stacked vertically. The square latch 120 is connected to both the first transmission plate 310 and the second transmission plate 320. A first screw 311 is installed on the first transmission plate 310, and a screw hole 221 for accommodating a second screw is provided on the second drive plate 220. The second screw passes through the lock housing 100 and is inserted into the screw hole 221, restricting the rotation of the second drive plate 220. In normal use, the second screw is in the installed state, restricting the rotation of the second drive plate 220. When the handle assembly 200 rotates counterclockwise, the second drive plate 220 cannot rotate due to the restriction of the second screw, thus failing to achieve the quick locking function. When quick unlocking is required, since the first screw 311 is installed on the first transmission plate 310, when the handle assembly 200 rotates clockwise, the first drive plate 210 abuts against the first screw 311, causing the first transmission plate 310 to rotate counterclockwise, thereby pushing the square tongue 120 to retract, achieving the quick unlocking escape function. This embodiment is suitable for locations with relatively low safety requirements, where quick unlocking is only needed in emergencies.

[0028] Example 2: Installation of the first screw 311 and removal of the second screw. The structure is basically the same as in Example 1, except that the second screw is removed from the screw hole 221 of the second drive plate 220. When quick locking is required, the handle assembly 200 rotates counterclockwise. Since the second screw has been removed, the second drive plate 220 is no longer restricted by it. The second drive plate 220 abuts against the second transmission plate 320, causing the second transmission plate 320 to rotate clockwise, thereby pushing the square tongue 120 out to achieve quick locking. When quick unlocking is required, again because the first screw 311 is installed on the first transmission plate 310, the handle assembly 200 rotates clockwise. The first drive plate 210 abuts against the first screw 311, causing the first transmission plate 310 to rotate counterclockwise, pushing the square tongue 120 back to retract, achieving quick unlocking. This example is suitable for locations with high security requirements that require frequent quick locking and unlocking switching.

[0029] Example 3: Removal of the first screw 311 and installation of the second screw. In this example, the first screw 311 is removed from the first transmission plate 310, while the second screw remains installed, restricting the rotation of the second drive plate 220. Because the first screw 311 is removed, when the handle assembly 200 rotates clockwise, the first drive plate 210 cannot engage with the first screw 311, and the first transmission plate 310 will not rotate, thus failing to achieve the rapid unlocking escape function. Conversely, the installation of the second screw restricts the rotation of the second drive plate 220. When the handle assembly 200 rotates counterclockwise, the second drive plate 220 cannot drive the second transmission plate 320 to rotate, similarly failing to achieve the rapid locking function. This example can be used as a common mechanical lock on a room door.

[0030] Example 4: Removal of the first screw 311 and the second screw. Similar to the above example, but both the first screw 311 and the second screw are in a disassembled state. In this state, because the first screw 311 is disassembled, when the handle assembly 200 rotates clockwise, the first drive plate 210 lacks the abutment of the first screw 311 and cannot drive the first transmission plate 310 to rotate counterclockwise, thus failing to push the square tongue 120 back, thereby canceling the quick unlocking escape function. When the user needs to quickly lock, they reverse the handle assembly 200, i.e., rotate the handle assembly 200 counterclockwise. Since the second screw restricts the rotation of the second drive plate 220, after disassembling the second screw, during the reverse lifting of the handle assembly 200, the second drive plate 220 rotates normally, transmitting force to the second transmission plate 320, causing the second transmission plate 320 to rotate clockwise, thereby pushing the square tongue 120 out, realizing the quick locking function of the handle assembly 200 in reverse locking.

[0031] Understandably, through the cooperative design of the first screw 311, the second screw, the first drive plate 210, and the second drive plate 220, in an emergency, the user only needs to turn the handle assembly 200 clockwise. The first drive plate 210 abuts against the first screw 311, driving the first transmission plate 310 to rotate, thus achieving the quick unlocking and escape function of retracting the square tongue 120. When locking is required, turning the handle assembly 200 counterclockwise causes the second drive plate 220 to abut against the second transmission plate 320, driving the second transmission plate 320 to rotate, thus achieving the quick locking function of extending the square tongue 120, greatly improving the convenience and security of the lock. Furthermore, through the disassembly / assembly of the first screw 311 and the second screw, four different working modes can be achieved, allowing users to flexibly switch the lock's functional state according to actual usage scenarios and security needs. For example, in normal use scenarios, the first screw 311 can be installed to achieve a quick unlocking function, while the second screw can be installed to control the quick locking function depending on security requirements. In special security protection scenarios, the first screw 311 can be removed and the second screw installed, putting the lock in a relatively "locked" quick-locking state, effectively improving security. The overall structure of this multi-functional lock is simple. By simply setting the first screw 311 on the transmission component 300 and the screw hole 221 on the second drive plate 220 to accommodate the second screw, multiple functions can be switched, reducing production costs and manufacturing difficulty, while improving the reliability and stability of the lock and reducing the failure rate caused by complex structures.

[0032] Reference Figure 1 Furthermore, the first driving plate 210 has a first driving protrusion 211 integrally formed or fixedly provided on the side facing the first transmission plate 310. The first driving protrusion 211 has a flat plate-like structure, and part of it extends into the upper space of the first transmission plate 310. The extension length is determined according to the internal space layout of the lock and the driving requirements. Generally, the extension length accounts for one-third to one-half of the height of the upper space of the first transmission plate 310. When the handle assembly 200 rotates clockwise, the first driving plate 210 rotates accordingly. The first driving protrusion 211 will precisely abut against the first screw 311 provided on the first transmission plate 310. With the first screw 311 as the force point, the first transmission plate 310 is driven to rotate counterclockwise, thereby pushing the square tongue 120 to retract and achieve quick unlocking.

[0033] The first driving convex plate 211 makes the contact between the first driving plate 210 and the first screw 311 more precise and stable, avoiding functional failure or damage to the transmission component 300 due to inaccurate driving, and improving the reliability of the lock unlocking function.

[0034] Furthermore, a second driving protrusion 321 is provided on the side of the second driving plate 220 facing the second transmission plate 320 by welding or integral molding. The second driving protrusion 321 is a plate-like structure with a certain thickness, and its shape is designed according to the position of the second transmission plate 320 and the driving requirements. The second transmission plate 320 extends into an extension portion on the side facing the second driving plate 220. When the handle assembly 200 rotates counterclockwise, the second driving plate 220 rotates accordingly, and the second driving protrusion 321 abuts against the extension portion of the second driving plate 220, driving the second transmission plate 320 to rotate clockwise, thereby pushing the square tongue 120 to extend and achieve quick locking. The cooperative design of the second driving protrusion 321 and the second transmission plate 320 allows the handle assembly 200 to quickly and effectively drive the second transmission plate 320 to rotate when rotating counterclockwise, realizing the quick extension and locking of the square tongue 120, improving the efficiency and convenience of locking.

[0035] Reference Figure 2 It should be noted that the square tongue 120 has a first driving groove 121 and a second driving groove 122 sequentially formed along its length. The size and shape of the first driving groove 121 and the second driving groove 122 are designed according to the movement requirements of the square tongue 120 and the pin size of the transmission assembly 300. A first pin 312 is fixedly provided on the first transmission plate 310 by welding or threaded connection, and a second pin 323 is also fixedly provided on the second transmission plate 320. During installation, the first pin 312 is inserted into the first driving groove 121, and the second pin 323 is inserted into the second driving groove 122. When the first transmission plate 310 or the second transmission plate 320 rotates, the first pin 312 and the second pin 323 will abut against the inner walls of the first driving groove 121 and the second driving groove 122, respectively. As the transmission plate rotates, it drives the square tongue 120 to retract or extend along the movement direction. By cooperating with the pin and the drive groove, stable transmission between the transmission component 300 and the square tongue 120 is achieved, avoiding problems such as the square tongue 120 not moving smoothly or getting stuck due to unstable transmission, thus improving the overall performance of the lock.

[0036] Specifically, the first drive groove 121 is designed as an arc-shaped groove, the curvature of which is determined according to the movement trajectory of the latch 120 when it retracts and the transmission requirements. Generally, the curvature ranges from 30° to 60°, and the arc-shaped groove curves outwards towards the lock housing 100. The second drive groove 122 is designed as an elongated groove arranged along the moving direction of the latch 120. The length of the elongated groove is determined according to the maximum moving distance of the latch 120 when it extends, generally 1.2 to 1.5 times the extension distance of the latch 120. When the first transmission plate 310 rotates, the first pin 312 slides in the arc-shaped groove, pushing the latch 120 to retract; when the second transmission plate 320 rotates, the second pin 323 slides in the elongated groove, pushing the latch 120 to extend. The arc-shaped groove design makes the movement trajectory of the latch 120 when it retracts smoother, reducing friction and collision between the latch 120 and the lock housing 100, reducing noise, and also improving the efficiency of the latch 120's retraction. The design of the elongated groove ensures the linear movement of the square tongue 120 when it extends, enabling the square tongue 120 to extend into place accurately and stably.

[0037] Reference Figure 1 A third driving protrusion 212 is provided on the first driving plate 210 by welding or integral molding. The third driving protrusion 212 is a plate-shaped structure with a certain thickness, and its shape is designed according to the position of the limiting groove 113 on the oblique tongue 110 and the driving requirements. The oblique tongue 110 is welded or integrally molded with a first limiting plate 111 and a second limiting plate 112 along the moving direction. A limiting groove 113 is formed between the first limiting plate 111 and the second limiting plate 112 to accommodate the third driving protrusion 212. The width of the limiting groove 113 is slightly larger than the thickness of the third driving protrusion 212 to ensure that the third driving protrusion 212 can slide smoothly in the limiting groove 113. When the handle assembly 200 rotates clockwise, the first driving plate 210 rotates accordingly, the third driving protrusion 212 abuts against the second limiting plate 112, and drives the oblique tongue 110 to retract along the moving direction.

[0038] Furthermore, a return spring 114 is fixedly connected to the first limiting plate 111 by welding or threaded connection, and the other end of the return spring 114 is also fixedly connected to the latch 110 by welding or threaded connection. The return spring 114 is in a stretched state. When the latch 110 is driven to retract by the third driving convex plate 212, the return spring 114 will be further stretched. When the handle assembly 200 stops rotating and loses the driving force on the third driving convex plate 212, the elastic restoring force of the return spring 114 will pull the latch 110 to extend and reset, so that the latch 110 can automatically extend and reset after losing external driving force, without manual operation, improving the convenience and automation of the lock.

[0039] It should be noted that a limiting protrusion 213 is provided on the first drive plate 210 by welding or integral molding. The limiting protrusion 213 is a plate-like structure with a certain thickness, and its position is determined according to the position of the first limiting plate 111 and the rotation angle limitation requirements of the handle assembly 200. When the handle assembly 200 rotates clockwise, the first drive plate 210 rotates accordingly, and the limiting protrusion 213 gradually approaches the first limiting plate 111. When it rotates to a certain angle, the limiting protrusion 213 abuts against the first limiting plate 111, preventing the handle assembly 200 from continuing to rotate, thereby limiting the rotation angle of the handle assembly 200.

[0040] In some embodiments, a limiting torsion spring 123 is fixedly installed inside the lock housing 100 by welding or threaded connection. One end of the limiting torsion spring 123 is connected to a fixed position on the lock housing 100, and the other end is connected to a limiting hole 323 on the second transmission plate 320, thereby connecting the square latch 120 through the second transmission plate 320. The elastic coefficient of the limiting torsion spring 123 is determined according to the weight and movement requirements of the square latch 120 and the second transmission plate to ensure that it can provide sufficient torque to maintain the extended or retracted state of the square latch 120. When the square latch 120 extends or retracts, the limiting torsion spring 123 will twist, generating an elastic restoring force, so that the square latch 120 can be stably maintained in the extended or retracted state without the action of external force.

[0041] In some embodiments, a lock cylinder 400 is fixedly mounted on the lock housing 100 by welding or threaded connection, and a lock core and other structures are disposed inside the lock cylinder 400. A third drive plate 410 is disposed on the lock cylinder 400 by welding or integral molding, and the third drive plate 410 is connected to the lock core. When the correct key is inserted into the lock core and turned, the lock core will drive the third drive plate 410 to rotate. The third drive plate 410 is provided with a transmission structure, such as a pin or a protrusion, that connects to the latch 120. The transmission structure drives the latch 120 to extend or retract in the moving direction, thereby opening and closing the lock. The design of the third drive plate 410 allows the lock to be driven mechanically by the handle assembly 200 or by a key, providing a dual drive method and increasing the flexibility and security of the lock.

[0042] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A multi-function lock characterized by, include: The lock case has a sliding configuration with a beveled latch and a square latch; A handle assembly is rotatably connected to the lock housing. The handle assembly is connected to a first drive plate and a second drive plate. The first drive plate and the second drive plate are stacked one on top of the other. The first drive plate is used to drive the square tongue to retract, and the second drive plate is used to drive the square tongue to extend. The transmission assembly, rotatably connected to the lock housing, includes a first transmission plate and a second transmission plate stacked vertically. The square tongue connects the first transmission plate and the second transmission plate. The first transmission plate is provided with a first screw. When the handle assembly rotates clockwise, the first drive plate abuts against the first screw and drives the first transmission plate to rotate counterclockwise, thereby pushing the square tongue to retract and realizing the escape function of quick unlocking. When the handle assembly rotates counterclockwise, the second drive plate abuts against the second transmission plate and drives the second transmission plate to rotate clockwise, thereby pushing the square tongue to extend and realizing the quick locking function. The second drive plate is provided with a screw hole for accommodating the second screw. The second screw passes through the lock housing and is inserted into the screw hole to restrict the rotation of the second drive plate. The removal / installation of the first screw and the second screw enables the switching between quick unlocking and quick locking functions.

2. The multi-function lock of claim 1, wherein, The first driving plate has a first driving protrusion on the side facing the first transmission plate. The first driving protrusion extends into the upper side of the first transmission plate to abut against the first screw.

3. The multi-function lock of claim 1 wherein, The second drive plate has a second drive protrusion on the side facing the second transmission plate, and the second drive protrusion is used to abut against the second transmission plate.

4. The multi-function lock of claim 1 wherein, The square tongue is provided with a first drive groove and a second drive groove in sequence along its length. The first transmission plate is provided with a first pin inserted into the first drive groove, and the second transmission plate is provided with a second pin inserted into the second drive groove. The first pin and the second pin respectively abut against the first drive groove and the second drive groove, so that the square tongue is driven to retract or extend as the first transmission plate and the second transmission plate rotate.

5. The multi-function lock of claim 4 wherein, The first drive groove is an arc-shaped groove that curves outward toward the outer side of the lock housing, and the second drive groove is an elongated groove arranged along the moving direction of the square tongue.

6. The multi-function lock of claim 1, wherein, The first driving plate is provided with a third driving protrusion, and the oblique tongue is provided with a first limiting plate and a second limiting plate along the moving direction. There is a limiting groove between the first limiting plate and the second limiting plate to accommodate the third driving protrusion. When the handle assembly rotates clockwise, the third driving protrusion abuts against the second limiting plate and drives the oblique tongue to retract.

7. The multi-function lock of claim 6 wherein, The first limiting plate is connected to a reset spring, and the other end of the reset spring is connected to the oblique tongue.

8. The multi-function lock of claim 1, wherein, The lock housing is provided with a limiting torsion spring, and the second transmission plate is provided with a limiting hole. The limiting torsion spring passes through the limiting hole and is connected to the second transmission plate so that the square tongue is kept in an extended or retracted state.

9. The multi-function lock of claim 6 wherein, The first drive plate is provided with a limiting protrusion, which can abut against the first limiting plate to limit the rotation angle of the handle assembly.

10. The multifunctional lock according to claim 1, characterized in that, The lock shell is provided with a lock cylinder, the lock cylinder is provided with a third driving piece, and the third driving piece is connected and drives the square tongue to extend or retract.

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