A lock and a door lock

Abstract

The present invention provides a lock and a door lock, belonging to the technical field of door locks. It solves the problems of poor security and short service life of existing door locks. The lock of the present application includes a drive shaft, and handle assemblies are connected to both ends of the drive shaft. The handle assembly includes a handle and a lock base. A linkage mechanism for locking the handle and the drive shaft to make them circumferentially fixed is provided between the handle on one of the handle assemblies and the drive shaft. The other handle assembly is provided with a switch mechanism for driving the linkage mechanism to lock or unlock. When the switch mechanism drives the linkage mechanism to unlock, the handle can rotate independently relative to the drive shaft. Therefore, the security performance and service life of this lock are improved at the same time.

Description

Technical Field

[0001] The present invention belongs to the technical field of door locks, relates to a lock, and particularly relates to a lock and a door lock. Background Art

[0002] A door lock includes an inner handle and an outer handle. The inner handle is installed on the inner side of the door, and the outer handle is installed on the outer side of the door. The inner handle and the outer handle are connected and fixed by a drive shaft. The inner handle, the drive shaft, and the outer handle can rotate synchronously. A locking tongue mechanism is connected to the drive shaft, and the expansion and contraction of the locking tongue are controlled by the rotation of the drive shaft to correspond to closing and opening the door. Conventional door locks also have a locking switch, which is generally installed at the inner handle and is controlled by a user inside the door to lock or unlock the door lock. The locking switch is generally a limiting structure that circumferentially locks the inner handle to prevent it from rotating, which will cause the drive shaft and the outer handle to also be unable to rotate. If the drive shaft cannot rotate, the locking tongue connected to the drive shaft cannot retract, and the door cannot be opened, thus preventing forced entry.

[0003] Since the locking switch on the existing door lock is generally a limiting structure and acts on the inner handle, in fact, by applying a strong external force to the outer handle, the locking switch can be damaged to forcibly rotate the drive shaft to open the door, which results in the low security of the existing door lock; moreover, after the existing door lock structure is locked, the outer handle is frequently pulled by people, and over time, the shaking amount of the outer handle is likely to become larger, resulting in easy damage to the entire door lock. Therefore, in view of these problems, a door lock with both safety performance and service life needs to be designed. Summary of the Invention

[0004] The purpose of the present invention is to provide a lock and a door lock for the above problems existing in the prior art. It solves the technical problems of poor safety and short service life of the existing door lock.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A lock includes a drive shaft, and handle assemblies are connected to both ends of the drive shaft. Each handle assembly includes a handle and a lock seat. The characteristic is that a linkage mechanism for locking the handle and the drive shaft to make them circumferentially fixed is provided between the handle on one of the handle assemblies and the drive shaft, and a switch mechanism for driving the linkage mechanism to lock or unlock is provided on the other handle assembly. When the switch mechanism drives the linkage mechanism to unlock, the handle can rotate independently relative to the drive shaft.

[0007] This lock includes two handle assemblies. Each handle assembly includes a lock seat and a handle. The lock seat can be connected and fixed to the door, and the handle is rotatably connected to the lock seat. A drive shaft for driving the locking tongue to expand and contract is connected between the two handles.

[0008] Unlike conventional door locks, one of the handles in this application is connected to the drive shaft via a linkage mechanism. The linkage mechanism has two states: a normal state, in which the linkage mechanism locks the handle and the drive shaft, i.e., they are circumferentially fixed. In this state, rotating the handle drives the drive shaft to rotate synchronously, and the drive shaft can normally drive the lock tongue to open and close the door; a locked state, in which the linkage mechanism unlocks the handle and the drive shaft, i.e., they are not circumferentially matched. In this state, external force can rotate the handle, and the handle can rotate normally, but the handle cannot drive the drive shaft to rotate, i.e., the door cannot be opened normally. The switching between these two states of the linkage mechanism is controlled by a switch mechanism on the other handle.

[0009] In summary, the biggest difference between the lock of the present application and conventional locks is that, when the door is locked, one of the handles (i.e., the outer door handle) can be rotated by external force, but it cannot drive the drive shaft to rotate. Even if a strong external force is applied to this handle, the drive shaft cannot be rotated. This greatly improves the safety performance of the entire lock. Secondly, when the door is locked, this handle is rotated to relieve a certain amount of torsional force, which can effectively prevent deformation and shaking caused by frequent or long-term twisting, and can greatly extend the life of the lock. Therefore, this lock improves safety performance while also extending its service life.

[0010] In the above-mentioned lock, the handle on the handle assembly with the switch mechanism is fixedly connected to the drive shaft.

[0011] This design ensures that regardless of whether the door is locked or unlocked, the handle with a switch mechanism (inside door handle) can always be directly rotated to drive the drive shaft to rotate and unlock the door, reducing the steps of turning the knob of the inside door handle to open the door, allowing timely escape in case of fire or other emergencies. This design is extremely safe.

[0012] At the same time, if the door is locked, rotating the outer door handle cannot unlock it and will not cause the inner door handle to rotate, further improving safety.

[0013] In the above-mentioned lock, the linkage mechanism includes a rotating sleeve and a limiting plate and the two can be fixed close to each other by being clamped, the handle has a connecting part and a handle part, and the end of the connecting part has an installation cavity, the rotating sleeve is axially fixed in the installation cavity and the rotating sleeve can rotate circumferentially relative to the installation cavity, the limiting plate is circumferentially fixed in the installation cavity and the switch mechanism drives the limiting plate to move along the center line direction of the installation cavity to approach the rotating sleeve, and the drive shaft is circumferentially fixed to the rotating sleeve.

[0014] The linkage mechanism of the present application includes a rotating sleeve and a limiting piece. The rotating sleeve is located in the installation cavity and can rotate circumferentially relative to the installation cavity, but cannot move along the installation cavity. The driving shaft is fixed on the rotating sleeve and can rotate synchronously with the rotating sleeve. The limiting piece is circumferentially fixed to the handle, but the limiting piece can move along the installation cavity. When the limiting piece and the rotating sleeve approach each other, they can be clamped and fixed to achieve circumferential fixation. In this way, turning the handle can drive the limiting piece, the rotating sleeve, and the driving shaft to rotate in sequence to achieve normal door opening and closing. When the limiting piece and the rotating sleeve move away from each other, the handle can only drive the limiting piece to rotate and cannot rotate the rotating sleeve. Such a design of the rotating sleeve and the limiting piece is equivalent to a clutch structure, which can effectively make the handle lose power transmission with the driving shaft when locking the door, ensuring that the handle (i.e., the external door handle) cannot open the door, improving the overall service life of the door lock while enhancing safety performance.

[0015] In the above-mentioned lock, a slot is provided on the rotating sleeve, and a clamping block is provided on the limiting piece and is matched with the slot. When the limiting piece approaches the rotating sleeve, the clamping block can be inserted into the slot to circumferentially fix the rotating sleeve and the limiting piece.

[0016] The circumferential fixed transmission between the rotating sleeve and the limiting piece is realized through the mutual cooperation of the slot and the clamping block. In such a structure, when the limiting piece does not move close enough to the rotating sleeve, there is no transmission between the limiting piece and the rotating sleeve. After locking the door, it can very well prevent being forcibly opened from the outside, with extremely high safety. And after locking the door, the handle can remain in a rotatable state to prevent being forcibly pulled and damaged, thus improving the service life.

[0017] In the above-mentioned lock, a travel slot is provided on the inner wall of the installation cavity along its center line direction. A ring-shaped convex portion protrudes from the outer circumference of the rotating sleeve. The slot is located on the ring-shaped convex portion and is arranged corresponding to the position of the travel slot. The clamping block is located on the outer circumference of the limiting piece and the clamping block is clamped in the travel slot to circumferentially fix the limiting piece and the installation cavity. The switching mechanism can drive the clamping block to move along the travel slot and be inserted into the slot.

[0018] A travel slot is provided in the installation cavity on the handle of the present application. The convex block on the limiting piece is clamped in the travel slot and can be limited by the travel slot to be circumferentially fixed to the handle. The travel slot extends to the rotating sleeve and corresponds to the slot on the rotating sleeve. The convex block can smoothly move along the guidance of the travel slot and can be inserted into the slot to achieve the transmission cooperation between the rotating sleeve and the limiting piece. Such a design of the travel slot can both play a role in limiting and guiding, making the overall mechanism operate smoothly, further improving safety and service life.

[0019] In the above-mentioned lock, the switch mechanism includes a connecting rod and a button assembly. The button assembly is fixed on another handle assembly. The drive shaft has a tubular structure. The connecting rod is arranged inside the drive shaft. One end of the connecting rod is connected to the button assembly, and the other end of the connecting rod passes through the rotating sleeve and abuts against the limiting piece. The button assembly can drive the rotation or movement of the connecting rod to push the limiting piece to move towards the side away from the rotating sleeve. A return spring is installed on the side of the limiting piece away from the connecting rod for the reset of the limiting piece.

[0020] The switch mechanism of the present application includes a connecting rod and a button assembly. The connecting rod is arranged inside the hollow drive shaft. One end of the connecting rod abuts against the limiting piece, and the other end cooperates with the button assembly. The limiting piece is pushed away from the rotating sleeve by the connecting rod. When the force on the connecting rod disappears, under the elastic force of the return spring, the limiting piece can move towards the rotating sleeve and get closer. The switch mechanism designed in this way is structurally compact, small in size, integrated inside the drive shaft without occupying space, and has excellent stability and safety.

[0021] In the above-mentioned lock, the button assembly includes a knob and a connecting block. The knob is rotatably connected to the handle part. The connecting block is located inside the installation cavity. The knob and the connecting block are coaxial and fixedly connected. One end of the connecting rod is fixed on the connecting block and can drive the connecting rod to rotate synchronously when the knob is turned;

[0022] A resisting part protrudes circumferentially at the other end of the connecting rod. The limiting piece has a recessed part. The surface of the recessed part is an arc surface. The resisting part abuts against the arc surface, and when the connecting rod rotates, the resisting part can move along the arc surface to make the limiting piece move along the center line direction of the installation cavity.

[0023] In the present application, the connecting rod and the limiting piece are in a pushing and abutting fit through the resisting part and the arc surface. The button assembly can control the rotation of the connecting rod. When the connecting rod rotates, its axial position does not change. The rotation of the connecting rod can drive the resisting part to rotate. The resisting part cooperates with the recessed part on the limiting piece. The recessed part has an arc-shaped surface, that is, an arc surface. As the resisting part rotates, it can move along the arc surface to push out the limiting piece. After the resisting part moves out of the arc surface, it abuts against the normal surface of the limiting piece. At this time, under the action of the return spring, the axial position of the entire limiting piece is locked and will not change, with higher safety.

[0024] In the above-mentioned lock, the linkage structure includes a bolt. The bolt is embedded in the handle. The drive shaft is pluggably connected to the end of the handle, and there is a pin hole corresponding to the bolt on the end of the handle, and the switch mechanism can drive the bolt to insert into the pin hole to make the handle and the drive shaft circumferentially fixed. [[ID=...]]

[0025] This is another embodiment of the linkage structure of the present application. In this embodiment, the linkage structure includes a pin, which is plugged in and out of the drive shaft. The pin can be transmitted by inserting it into the pin hole. This design can achieve the same technical effect as the above-mentioned scheme, and ensures the service life on the basis of improving safety performance.

[0026] In the above-mentioned lock, the switch mechanism is a terminal controller and a solenoid valve, the solenoid valve is connected to the bolt, and the terminal controller can control the switch of the solenoid valve to drive the bolt to be telescopically inserted into the pin hole.

[0027] This is another embodiment of the switching mechanism of the present application. In this embodiment, the switching mechanism is a combination of a terminal controller and a solenoid valve. The terminal controller can control the switch of the solenoid valve, and the solenoid valve can drive the transmission coordination between the latch telescopic control handle and the drive shaft, which can achieve the same technical effect as the above method.

[0028] A door lock is characterized by comprising a locking tongue mechanism and the above-mentioned lock, wherein the locking tongue mechanism is connected to the driving shaft, and the locking tongue on the locking tongue mechanism is driven to extend and retract through the rotation of the driving shaft.

[0029] Compared with existing technologies, the advantages of this product are:

[0030] The difference from conventional door locks is that one of the handles of the present application is connected to the drive shaft through a linkage mechanism. When the door is locked, the handle (i.e., the outer door handle) can be rotated by external force, but it cannot drive the drive shaft to rotate. Even if a strong external force acts on this handle, the drive shaft cannot be rotated. This greatly improves the safety performance of the entire lock. Secondly, when the door is locked, this handle can relieve a certain amount of torsional force by being rotated, which can effectively prevent deformation and shaking caused by frequent or long-term twisting, and can greatly improve the service life. In summary, this lock not only improves safety performance but also improves service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention;

[0032] Figure 2 is a cross-sectional view of the present invention;

[0033] Figure 3 The present invention Figure 2 A local enlarged view of point A;

[0034] Figure 4 is a schematic structural diagram of one of the handle assemblies of the present invention;

[0035] Figure 5 is a cross-sectional view of one of the handle assemblies of the present invention;

[0036] Figure 6 is a partial structural schematic diagram of the present invention;

[0037] Figure 7 is a part drawing of the limiting piece of the present invention.

[0038] In the figure, 1 is a drive shaft; 2 is a handle assembly; 21 is a handle; 22 is a lock seat; 23 is a connecting part; 24 is a handle part; 25 is an installation cavity; 251 is a travel groove; 3 is a linkage mechanism; 31 is a rotating sleeve; 311 is a card slot; 312 is an annular convex part; 32 is a limiting piece; 321 is a clamping block; 322 is a recessed part; 323 is an arc surface; 324 is a shallow groove; 33 is a return spring; 4 is a switch mechanism; 41 is a connecting rod; 411 is a resisting part; 42 is a button assembly; 43 is a knob; 44 is a connecting block. Specific embodiments

[0039] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0040] Embodiment 1

[0041] As Figures 1 - 7 shown, a lock includes a drive shaft 1, and both ends of the drive shaft 1 are connected with a handle assembly 2. The handle assembly 2 includes a handle 21 and a lock seat 22. The two lock seats 22 are respectively fixed on the inner side and the outer side of the door, and the two handles 21 are respectively rotatably connected to the lock seats 22. Such two handle assemblies 2 form an inner door handle 21 and an outer door handle 21. A return coil spring is also arranged between the handle 21 and the lock seat 22, and the return coil spring can provide a force for reset rotation after the handle 21 rotates. The rotation of both two handles 21 can drive the drive shaft 1 to rotate, and the drive shaft 1 is used to drive the telescopic movement of the lock tongue mechanism. The lock tongue mechanism is a mature technical means in the art and will not be elaborated here too much. Further, the handle 21 has a connecting part 23 and a handle part 24, and an installation cavity 25 is provided at the end of the connecting part 23. Both ends of the drive shaft 1 are respectively located in the two installation cavities 25. The drive shaft 1 of the present application is used to drive the telescopic movement of the lock tongue, and both ends of the drive shaft 1 respectively extend into and are hidden in the installation cavity 25, so that the drive shaft 1 can be well protected.

[0042] A linkage mechanism 3 is provided between the handle 21 on the outer door handle assembly 2 and the drive shaft 1 for locking the handle 21 and the drive shaft 1 to fix them circumferentially. The inner door handle assembly 2 is provided with a switch mechanism 4 for driving the linkage mechanism 3 to lock or unlock. When the switch mechanism 4 drives the linkage mechanism 3 to unlock, the handle 21 can rotate independently relative to the drive shaft 1. Different from conventional door locks, the outer door handle 21 and the drive shaft 1 of this application are connected through the linkage mechanism 3, and the inner door handle 21 and the drive shaft 1 are directly fixed. The linkage mechanism 3 has two states: the normal state, in which the linkage mechanism 3 can lock the handle 21 and the drive shaft 1, that is, circumferentially fix them. In this state, when the handle 21 rotates, it can drive the drive shaft 1 to rotate synchronously, and when the drive shaft 1 rotates, it can normally drive the lock tongue to open and close the door; the door-locking state, in which the linkage mechanism 3 can unlock the handle 21 and the drive shaft 1, that is, there is no circumferential mating relationship. In this state, when an external force rotates the handle 21, the handle 21 can be rotated normally, but the handle 21 cannot drive the drive shaft 1 to rotate, that is, the door cannot be opened normally. The switching between these two states of the linkage mechanism 3 is controlled by the switch mechanism 4 on another handle 21. In summary, the biggest difference between the lock of this application and conventional locks is that in the door-locking state, one of the handles 21, that is, the outer door handle 21, can be rotated by an external force, but it cannot drive the drive shaft 1 to rotate. Even if a strong external force acts on this handle 21, the drive shaft 1 cannot be rotated, which greatly improves the safety performance of the entire lock. Secondly, in the door-locking state, this handle 21 can relieve a certain amount of torsional force by being rotated, which can effectively prevent deformation and shaking caused by frequent or long-term counter-twisting, and can better improve the service life. Therefore, this lock improves both the safety performance and the service life.

[0043] The outer door handle 21 and the drive shaft 1 of this application are connected through the linkage mechanism 3, and the inner door handle 21 and the drive shaft 1 are directly fixed. Such a design enables the inner door handle 21 on the inner side of the door to always directly rotate to drive the drive shaft 1 to rotate to unlock the door regardless of whether the door is locked or unlocked. Compared with the ordinary type of unlocking the door from the inside, which requires rotating the locking knob 43 and then pressing down the handle to open the door, the inner door handle 21 of this application can open the door by pressing down the handle 21 regardless of whether there is a door-locking scenario, reducing the steps of rotating the knob 43 and then opening the door to escape in time in case of fire, emergencies, etc. This design has extremely high safety. At the same time, if the door is in the locked state, rotating the outer door handle 21 cannot unlock it and will not drive the inner door handle 21 to rotate, further improving the safety.

[0044] The specific structure of the linkage structure of this application is as follows: The linkage mechanism 3 includes a rotating sleeve 31 and a limiting piece 32, and the two can be clamped and fixed to each other when approaching. The rotating sleeve 31 is axially fixed in the installation cavity 25 and can rotate circumferentially relative to the installation cavity 25. The limiting piece 32 is circumferentially fixed in the installation cavity 25, and the switch mechanism 4 drives the limiting piece 32 to move along the center line direction of the installation cavity 25 to approach the rotating sleeve 31. The driving shaft 1 is circumferentially fixed to the rotating sleeve 31. The linkage mechanism 3 of this application includes a rotating sleeve 31 and a limiting piece 32. The rotating sleeve 31 is located in the installation cavity 25 and can rotate circumferentially relative to the installation cavity 25, but cannot move along the installation cavity 25. The driving shaft 1 is fixed on the rotating sleeve 31 to achieve synchronous rotation with the rotating sleeve 31. The limiting piece 32 is circumferentially fixed to the handle 21, but the limiting piece 32 can move along the installation cavity 25. After the limiting piece 32 and the rotating sleeve 31 approach each other, they can be clamped and fixed to achieve circumferential fixation. In this way, turning the handle 21 can drive the limiting piece 32, the rotating sleeve 31, and the driving shaft 1 to rotate in sequence to achieve normal door opening and closing. After the limiting piece 32 and the rotating sleeve 31 move away from each other, the handle 21 can only drive the limiting piece 32 to rotate and cannot rotate the rotating sleeve 31. Such a design of the rotating sleeve 31 and the limiting piece 32 is equivalent to a clutch structure, which can effectively make the handle 21 lose its transmission with the driving shaft 1 when locking the door, ensuring that the handle 21, that is, the outer door handle 21, cannot open the door, and improving the service life of the overall door lock while enhancing the safety performance.

[0045] Further, a slot 311 is formed on the rotating sleeve 31, and a clamping block 321 that cooperates with the slot 311 is provided on the limiting piece 32. When the limiting piece 32 approaches the rotating sleeve 31, the clamping block 321 can be inserted into the slot 311 to circumferentially fix the rotating sleeve 31 and the limiting piece 32. The circumferential fixed transmission between the rotating sleeve 31 and the limiting piece 32 is realized through the mutual cooperation of the slot 311 and the clamping block 321. With such a structure, when the limiting piece 32 does not move to a position close enough to the rotating sleeve 31, there is no transmission between the limiting piece 32 and the rotating sleeve 31. After locking the door, it can very well prevent being forcibly opened from the outside, with extremely high safety. And after locking the door, the handle 21 can maintain a rotatable state to prevent being forcibly pulled and damaged, thus improving the service life.

[0046] Preferably, a travel groove 251 is formed in the inner wall of the installation cavity 25 along the direction of its center line. A ring-shaped convex portion 312 protrudes from the outer periphery of the rotating sleeve 31. The clamping groove 311 is located on the ring-shaped convex portion 312 and is arranged corresponding to the position of the travel groove 251. The clamping block 321 is located on the outer periphery of the limiting piece 32, and the clamping block 321 is clamped in the travel groove 251 so that the limiting piece 32 is circumferentially fixed to the installation cavity 25. The switch mechanism 4 can drive the clamping block 321 to move along the travel groove 251 and snap into the clamping groove 311. A travel groove 251 is formed in the installation cavity 25 on the handle 21 of the present application. The convex block on the limiting piece 32 is clamped in the travel groove 251 and can be limited by the travel groove 251 and circumferentially fixed to the handle 21. The travel groove 251 extends to the rotating sleeve 31 and corresponds to the clamping groove 311 on the rotating sleeve 31. The convex block can smoothly move along the guide of the travel groove 251 and then snap into the clamping groove 311 to realize the transmission cooperation between the rotating sleeve 31 and the limiting piece 32. Such a design of the travel groove 251 can play both a limiting and a guiding role, making the overall mechanism operate smoothly and further improving the safety and service life.

[0047] The specific structure of the switch mechanism 4 of the present application is as follows: The switch mechanism 4 includes a connecting rod 41 and a button assembly 42. The button assembly 42 is fixed on another handle assembly 2. The driving shaft 1 is of a tubular structure. The connecting rod 41 is arranged inside the driving shaft 1. One end of the connecting rod 41 is connected to the button assembly 42, and the other end of the connecting rod 41 passes through the rotating sleeve 31 and abuts against the limiting piece 32. The button assembly 42 can drive the rotation of the connecting rod 41 to push the limiting piece 32 to move toward the side away from the rotating sleeve 31. A return spring 33 is installed on the side of the limiting piece 32 away from the connecting rod 41 for the reset of the limiting piece 32. The switch mechanism 4 of the present application includes a connecting rod 41 and a button assembly 42. The connecting rod 41 is arranged inside the hollow driving shaft 1. One end of the connecting rod 41 abuts against the limiting piece 32, and the other end cooperates with the button assembly 42. The limiting piece 32 is pushed away from the rotating sleeve 31 by the connecting rod 41. When the acting force on the connecting rod 41 disappears, under the elastic force of the return spring 33, the limiting piece 32 can move toward the rotating sleeve 31 and get closer. The switch mechanism 4 designed in this way is compact in structure, small in size, integrated in the driving shaft 1 without occupying space, and has excellent stability and safety.

[0048] Furthermore, the button assembly 42 includes a knob 43 and a connecting block 44. The knob 43 is rotatably connected to the handle portion 24. The connecting block 44 is located inside the installation cavity 25. The knob 43 and the connecting block 44 are coaxial and fixedly connected. One end of the connecting rod 41 is fixed to the connecting block 44, and when the knob 43 is turned, the connecting rod 41 can be driven to rotate synchronously. A resisting portion 411 protrudes circumferentially at the other end of the connecting rod 41. The limiting piece 32 has a recessed portion 322, and the surface of the recessed portion 322 is an arc surface 323. The resisting portion 411 abuts against the arc surface 323, and when the connecting rod 41 rotates, the resisting portion 411 can move along the arc surface 323 so that the limiting piece 32 moves along the central axis direction of the installation cavity 25. In the present application, the connecting rod 41 and the limiting piece 32 are in a pushing and resisting fit through the resisting portion 411 and the arc surface 323. The button assembly 42 can control the rotation of the connecting rod 41. When the connecting rod 41 rotates, its axial position does not change. The rotation of the connecting rod 41 can drive the resisting portion 411 to rotate. The resisting portion 411 cooperates with the recessed portion 322 on the limiting piece 32. The recessed portion 322 has an arc-shaped surface, that is, the arc surface 323. As the resisting portion 411 rotates, it can move along the arc surface 323 to push out the limiting piece 32. After the resisting portion 411 moves out of the arc surface 323, it abuts against the normal surface of the limiting piece 32. At this time, under the action of the return spring 33, the axial position of the entire limiting piece 32 is locked and will not change, with higher safety.

[0049] Furthermore, the limiting piece 32 of the present application has an annular structure. Two symmetric convex blocks protrude on its outer periphery for cooperating with two travel grooves 251 opened on the side wall of the inner cavity. On the side of the limiting piece 32 close to the limiting sleeve, there are two symmetrically distributed recessed portions 322 in a waist shape. There are two platforms between the two recessed portions 322. The platforms are the highest points and there are shallow grooves 324 at the platforms. After the resisting portion 411 slides from the recessed portion 322 to the platform, it can be caught in the shallow groove 324. As the entire outer handle 21 is rotated by an external force, the shallow groove 324 can resist and limit the resisting portion 411 so that it will not fall off by itself. At the same time, the return spring 33 also has a certain pushing force, making it difficult for the resisting portion 411 to escape from the shallow groove 324. When rotated from the button, the entire connecting rod 41 can be driven to rotate, so that the resisting portion 411 escapes from the shallow groove 324 and moves to the recessed portion 322. Such a design has a reasonable structure and high safety.

[0050] A door lock includes a locking tongue mechanism and the above-mentioned lock. The locking tongue mechanism is connected to the driving shaft 1, and the rotation of the driving shaft 1 drives the locking tongue on the locking tongue mechanism to extend and retract.

[0051] Embodiment 2

[0052] This is another implementation of the linkage structure of the present application. In this implementation, other structures are basically the same as those in the first embodiment, except that: the linkage structure 3 includes a bolt, the bolt is embedded in the side wall of the installation cavity 25, the end of the drive shaft 1 has a pin hole corresponding to the bolt, and the switch mechanism 4 can drive the bolt to insert into the pin hole to circumferentially fix the handle 21 and the drive shaft 1. Such a design can achieve the same technical effect as the above solution, ensuring the service life while improving the safety performance.

[0053] In this implementation, the switch mechanism 4 is a terminal controller and a solenoid valve. The solenoid valve is connected to the bolt. The terminal controller can control the opening and closing of the solenoid valve to drive the bolt to stretch and insert into the pin hole. The switch mechanism 4 is a combination of a terminal controller and a solenoid valve. The solenoid valve can be a solenoid valve with a temperature bulb. The extension of the temperature bulb can drive the extension of the bolt. The terminal controller can control the opening and closing of the solenoid valve. The terminal controller can be a central control computer with a display screen, and the solenoid valve can be directly controlled through the screen. The solenoid valve can drive the bolt to stretch and control the transmission cooperation between the handle 21 and the drive shaft 1, so as to achieve the same technical effect as the above method.

[0054] A door lock includes a locking tongue mechanism and the above-mentioned lock. The locking tongue mechanism is connected to the drive shaft 1, and the rotation of the drive shaft 1 drives the locking tongue on the locking tongue mechanism to stretch.

[0055] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the present invention. At the same time, the basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art of this industry should understand.

Claims

1. A lock, comprising a drive shaft (1), both ends of the drive shaft (1) are connected with handle assemblies (2), the handle assembly (2) comprises a handle (21) and a lock base (22), and is characterized in that, A linkage mechanism (3) is provided between the handle (21) on one of the handle assemblies (2) and the drive shaft (1) to lock the handle (21) and the drive shaft (1) so that the two are circumferentially fixed. The other handle assembly (2) has a switch mechanism (4) for driving the linkage mechanism (3) to lock or unlock. When the switch mechanism (4) drives the linkage mechanism (3) to unlock, the handle (21) can rotate independently relative to the drive shaft (1). The linkage mechanism (3) comprises a rotating sleeve (31) and a limiting piece (32), and the two can be clamped and fixed to each other; the handle (21) comprises a connecting portion (23) and a handle portion (24); the end of the connecting portion (23) comprises a mounting cavity (25); the limiting piece (32) is circumferentially fixed in the mounting cavity (25); and the switch mechanism (4) drives the limiting piece (32) to move along the center line direction of the mounting cavity (25) to approach the rotating sleeve (31); the drive shaft (1) is circumferentially fixed to the rotating sleeve (31); The switch mechanism (4) comprises a connecting rod (41) and a button assembly (42), wherein the button assembly (42) is fixed to another handle assembly (2), the drive shaft (1) is in a tubular structure, the connecting rod (41) is passed through the inner side of the drive shaft (1), one end of the connecting rod (41) is connected to the button assembly (42), and the other end of the connecting rod (41) passes through the rotating sleeve (31) and abuts against the limiting plate (32), and the button assembly (42) can drive the connecting rod (41) to rotate or move so as to push the limiting plate (32) to move toward the side away from the rotating sleeve (31), and a reset spring (33) is installed on the side of the limiting plate (32) away from the connecting rod (41) for resetting the limiting plate (32); The connecting rod (41) is provided with a circumferentially protruding stopper (411) at one end where the limiting plate (32) is located. The limiting plate (32) has a recessed portion (322). The surface of the recessed portion (322) is an arcuate surface (323). The stopper (411) abuts against the arcuate surface (323). When the connecting rod (41) rotates, the stopper (411) can move along the arcuate surface (323) to enable the limiting plate (32) to move along the center line direction of the mounting cavity (25). The highest point of the recessed portion (322) is adjacent to a platform, and a shallow groove (324) is provided on the platform. The blocking portion (411) can be inserted into the shallow groove (324) after moving along the arc surface (323) to the platform.

2. The lock according to claim 1, wherein The handle (21) on the handle assembly (2) with the switch mechanism (4) is fixedly connected to the drive shaft (1).

3. The lock according to claim 2, characterized in that, The rotating sleeve (31) is axially fixed in the installation cavity (25) and the rotating sleeve (31) can rotate circumferentially relative to the installation cavity (25).

4. A lock according to claim 3, characterized in that, The rotating sleeve (31) is provided with a card slot (311), and the limiting piece (32) is provided with a card block (321) that cooperates with the card slot (311). When the limiting piece (32) is close to the rotating sleeve (31), the card block (321) can be inserted into the card slot (311) to fix the rotating sleeve (31) and the limiting piece (32) circumferentially.

5. A lock according to claim 4, characterized in that, A travel groove (251) is provided on the inner wall of the installation cavity (25) along the center line thereof; an annular convex portion (312) is protruded on the outer periphery of the rotating sleeve (31); the clamping groove (311) is located on the annular convex portion (312) and the position of the clamping groove (311) is arranged corresponding to the travel groove (251); the clamping block (321) is located on the outer periphery of the limiting piece (32) and the clamping block (321) is clamped in the travel groove (251) so that the limiting piece (32) and the installation cavity (25) are fixed in the circumferential direction; the switch mechanism (4) can drive the clamping block (321) to move along the travel groove (251) and be clamped into the clamping groove (311).

6. A lock according to claim 5, characterized in that, The button assembly (42) includes a knob (43) and a connecting block (44). The knob (43) is rotatably connected to the handle portion (24). The connecting block (44) is located inside the mounting cavity (25). The knob (43) and the connecting block (44) are coaxial and fixedly connected. One end of the connecting rod (41) is fixed to the connecting block (44) and can drive the connecting rod (41) to rotate synchronously when the knob (43) is turned.

7. A lock according to claim 1 or 2, characterized in that, The linkage structure comprises a latch, which is embedded in the handle (21); the drive shaft (1) is pluggably connected to the end of the handle (21); and a pin hole corresponding to the latch is provided on the end of the handle (21); and the switch mechanism (4) can drive the latch to be inserted into the pin hole so that the handle (21) and the drive shaft (1) are circumferentially fixed.

8. A lock according to claim 7, characterized in that The switch mechanism (4) comprises a terminal controller and a solenoid valve, wherein the solenoid valve is connected to the latch, and the terminal controller can control the switch of the solenoid valve to drive the latch to be telescopically inserted into the pin hole.

9. A door lock, characterized in that, The invention comprises a locking tongue mechanism and a lock as described in any one of items 1 to 8 above, wherein the locking tongue mechanism is connected to the driving shaft (1), and the rotation of the driving shaft (1) drives the locking tongue on the locking tongue mechanism to extend and retract.

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