Lock with detachable front lock assembly

Abstract

The invention discloses a lock with a detachable front lock assembly. The lock comprises a fixed seat assembly fixedly connected to a door leaf and the front lock assembly detachably connected with the fixed seat assembly. The front lock assembly comprises a front handle, a front handle second output shaft, a clutch and an unlocking device which are connected through the clutch, and the rotation angle limiting device limits the relative rotation angle. The fixing base assembly comprises a lock body, an outer cylinder piece, a middle cylinder piece and an inner shaft piece, the middle cylinder piece and the inner shaft piece can independently drive the spring bolt to retract, and the locking rod is used for locking the middle cylinder piece. The front lock assembly and the middle cylinder piece are locked through connecting devices such as an elastic buckle and a buckle hole, an avoiding hole is formed in the outer cylinder piece, and the spring bolt and the connecting devices are staggered when locked. In the unlocking process, the clutch is separated to enable the front handle to rotate, the inner shaft piece drives the locking rod to be unlocked, the front handle drives the middle barrel piece to retract the spring bolt, meanwhile, the connecting device is aligned with the receding hole, and the front lock assembly can be disassembled after unlocking is conducted through a tool. The design is convenient to maintain, and the assembling and disassembling efficiency and safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field related to locks, and in particular to a lock with a detachable front lock assembly. Background Art

[0002] Locks are generally divided into traditional mechanical locks and electronic locks. Traditional mechanical locks, due to their purely mechanical structure, require only simple lubrication to maintain smooth operation, resulting in excellent durability. With technological advancements and the widespread adoption of intelligent locks, electronic locks have become widely popular. Among them, smart ball locks are one of the best-selling locks in both domestic and overseas markets. These smart ball locks, based on traditional structural design, integrate intelligent electronic components such as fingerprint recognition, password input, motors, and batteries, significantly enhancing the lock's ease of use. For example, the applicant's previously filed Chinese invention patent, publication number CN118774472B, discloses a front lock assembly and an electric ball lock comprising a fixed base, a front handle housing, and a front cover. The front handle housing includes a sleeve portion rotatably mounted on the fixed base and a first housing connected to the sleeve portion. The sleeve portion is provided with a connecting rod. The first housing has a first cavity. A cylindrical housing is defined between the front cover and the first housing. The electric clutch mechanism and dry cell batteries are arranged along the length of the housing cavity and are spaced circumferentially around the axial direction of the sleeve portion. To ensure the front handle housing can be stably rotated and connected to the fixed base, the existing technology generally uses a retaining spring or nut at the end of the sleeve to prevent the sleeve from falling out. If the intelligent electronic components inside the lock's front handle housing malfunction, this stable front handle housing connection becomes a major obstacle during maintenance. During disassembly and maintenance, the rear handle sleeve must be removed before the front handle can be removed, which is equivalent to completely disassembling the lock. This "complete disassembly and repair" model not only increases the user's time cost, but also may cause component wear due to repeated disassembly, thereby shortening the lock's lifespan. Summary of the Invention

[0003] In order to overcome at least one of the above-mentioned problems existing in the disassembly and maintenance of the front handle housing of the smart ball lock in the prior art, the present invention provides a lock having a detachable front lock assembly, the lock comprising a front lock assembly and a fixing base assembly, the fixing base assembly being used to be fixedly connected to the door leaf, the front lock assembly being detachably connected to the fixing base assembly; The front lock assembly includes a front handle, the front handle including a front handle housing and a first front handle output shaft fixedly connected to the front handle housing; the front lock assembly also includes a second front handle output shaft, a clutch, and an unlocking device; the second front handle output shaft is connected to the front handle via the clutch, the second front handle output shaft includes a cylindrical front handle connecting cylinder, the first front handle output shaft extends into the front handle connecting cylinder, and a rotation angle limiting device is further provided between the front handle and the second front handle output shaft, the rotation angle limiting device being used to limit relative rotation between the front handle and the second front handle output shaft within a limited angle range; The unlocking device is used to control the clutch action of the clutch, and the clutch is used to control whether the front handle and the second output shaft of the front handle rotate relative to each other through the clutch action. When the unlocking device confirms a legitimate door opening signal, the clutch separates the front handle and the second output shaft of the front handle, thereby allowing the front handle and the second output shaft of the front handle to rotate relative to each other within a limited angle range. Otherwise, the front handle and the second output shaft of the front handle are connected and can rotate synchronously. The fixing seat assembly includes a lock body, which includes a lock body shell and a lock tongue that can be telescopically moved at the opening of the lock body shell; the fixing seat assembly also includes an outer cylinder member fixedly connected to the lock body shell, an intermediate cylinder member that can rotate is installed on the inner side of the outer cylinder member, the inner side end of the intermediate cylinder member is transmission-connected to the lock tongue, and the outer side end is used for detachably connecting the front handle connecting cylinder of the second output shaft of the front handle; the inner side of the intermediate cylinder member is provided with a rotatable inner shaft member, the inner side end of the inner shaft member is also transmission-connected to the lock tongue, and the outer side end is used for detachably connecting to the first output shaft of the front handle; the intermediate cylinder member and the inner shaft member can rotate independently to drive the lock tongue to retract; the fixing seat assembly also includes a locking rod, which is used to lock the rotation of the intermediate cylinder member; The invention also includes a connecting device, wherein when the second output shaft of the front handle is connected to the intermediate cylinder member, locking is achieved through the connecting device. When the second output shaft of the front handle is connected to the intermediate cylinder member, the outer end of the inner shaft member is also detachably connected to the first output shaft of the front handle in the axial direction, so that the first output shaft of the front handle and the inner shaft member form a linkage. The connecting device is placed on the inner side of the outer cylinder member; an avoidance hole corresponding to the connecting device is provided on the outer cylinder member, and when the lock tongue is extended outward and is in a locked state, the avoidance hole and the connecting device are staggered. When unlocking and opening the door, the clutch disengages after the unlocking device confirms a legal door opening signal, and the front handle shell rotates, driving the front handle first output shaft and the inner shaft to rotate relative to the front handle second output shaft and the intermediate cylinder within a limited angle range. When the inner shaft rotates to the edge of the limited angle range, it can drive the locking rod to release the lock of the intermediate cylinder, and the front handle shell can continue to rotate to further drive the front handle second output shaft and the intermediate cylinder to rotate, thereby driving the lock tongue to retract to complete the door opening; while completing the door opening, the connecting device is also rotated to a position aligned with the avoidance hole. At this time, a tool is used to pass through the avoidance hole to release the lock of the connecting device, and at the same time, the front handle shell is pulled outward to allow the front handle first output shaft and the front handle second output shaft to respectively disengage from the inner shaft and the intermediate cylinder to remove the front lock assembly.

[0004] Among them, the front lock assembly is a driving component installed on the front side of the door leaf (i.e., the outside of the door leaf). The front lock assembly is used to allow a user outside the room to operate to release the connection state of the clutch in the front lock assembly, the locked state of the lock tongue, and the locked state of the door leaf. In addition, the front lock assembly and the fixing seat assembly are connected through elastic buckles and buckle holes, and the front lock assembly can be easily installed and disassembled.

[0005] The lock further comprises a rear lock assembly installed on the rear side of the door leaf, and the rear lock assembly is used to allow a user in the room to operate to open or lock the door.

[0006] The front handle first output shaft is a shaft-shaped member connected to the inner shaft. The front handle first output shaft and the inner shaft are detachably connected along the axial direction, allowing them to be connected and disconnected by simply plugging and unplugging. Furthermore, the front handle first output shaft is fixedly connected to the front handle housing. Rotating the front handle housing rotates the front handle first output shaft, thereby driving the inner shaft to rotate.

[0007] The second output shaft of the front handle is a component that is rotatably connected to the front handle, that is, in actual application, the second output shaft of the front handle can be rotatably connected to the front handle shell or the first output shaft of the front handle. The second output shaft of the front handle includes a cylindrical front handle connecting tube and an annular member. The annular member extends radially outward from the root of the front handle connecting tube, and the outer edge of the annular member is aligned with the end opening of the front handle shell. The second output shaft of the front handle and the front handle shell together form the outer shell portion of the front lock assembly. In addition, when the second output shaft of the front handle is sleeved on the intermediate cylinder, at least the portion of the second output shaft of the front handle provided with the elastic buckle or buckle hole extends into the outer cylinder, so that the outer cylinder covers the elastic buckle or buckle hole.

[0008] The clutch is a movable component disposed within the housing formed by the second output shaft of the front handle and the front handle housing. Driven by the unlocking device, the clutch moves back and forth to control the connection and disconnection between the front handle and the second output shaft of the front handle. This includes at least two specific connection methods: In the first connection method, the clutch connects the front handle housing to the second output shaft of the front handle; in the second connection method, the clutch connects the first output shaft of the front handle to the second output shaft of the front handle.

[0009] The unlocking device is a driving component located within the housing formed by the second output shaft of the front handle and the front handle housing. Common unlocking devices include a mechanical lock cylinder or an electric actuator with a signal identifier. For ease of operation, the unlocking device is typically located on the front handle housing, with some operating structures exposed, such as the keyhole, password keypad, or touch screen. However, some contactless identification devices (such as Bluetooth or NFC signal recognition devices) can be installed within the housing without being exposed. Accordingly, the legitimate door opening signal refers to the key for the matching mechanical lock cylinder, the correct password, the correct fingerprint signal, or the correct wireless key.

[0010] The rotation angle limiting device is a mechanism for limiting the relative rotation of the front handle and the second output shaft of the front handle within a limited angle range. In one specific embodiment, the front handle housing and the second output shaft of the front handle are respectively provided with sliding grooves and positioning ribs. When the unlocking device controls the clutch to move and separate the second output shaft of the front handle from the front handle, the positioning rib can move back and forth within the sliding groove, thereby limiting the relative rotation of the front handle and the second output shaft of the front handle to a limited angle range. Since the front handle housing and the first output shaft of the front handle are fixedly connected together, in another embodiment, the sliding groove and positioning rib can also be provided on the front handle housing and the second output shaft of the front handle, respectively.

[0011] The outer cylinder, intermediate cylinder, and inner shaft are three cylindrical components sleeved together on the fixed seat assembly. The outer cylinder is fixedly connected to the lock body housing and is a non-rotating component. The intermediate cylinder and inner shaft are rotatably mounted within the outer cylinder. The intermediate cylinder and inner shaft can rotate independently relative to the outer cylinder. In this way, the first output shaft and the second output shaft of the front handle of the front lock assembly, after being connected to the intermediate cylinder and the inner shaft, can also rotate independently relative to each other as a pair. In addition, the outer cylinder obscures at least a portion of the intermediate cylinder and the inner shaft.

[0012] The intermediate cylindrical member is removably connected to the front handle connecting tube of the second output shaft of the front handle via removable connecting devices disposed on the second output shaft and the intermediate cylindrical member, respectively. In one embodiment, the connecting device comprises an elastic buckle and a buckle hole, the elastic buckle being disposed on the intermediate cylindrical member, and the buckle hole being disposed on the second output shaft of the front handle. During installation, the intermediate cylindrical member and the second output shaft of the front handle are axially plugged into each other. Once the buckle hole is aligned with the elastic buckle, the elastic buckle engages the buckle hole, locking the second output shaft axially and circumferentially. During disassembly, the lock on the second output shaft of the front handle can be released by simply separating the elastic buckle from the buckle hole. Furthermore, since the elastic buckle and the buckle hole are positioned inside the outer cylindrical member, when the avoidance hole and the buckle hole are offset, the elastic buckle and the buckle hole are obscured, making them impossible to separate. Of course, in other equivalent embodiments, the connecting device may alternatively be a removable connecting screw or pin.

[0013] Among them, the inner shaft is a component that is rotatably arranged in the intermediate cylinder, and the two ends of the inner shaft are respectively connected to the lock tongue and the first output shaft of the front handle, that is, by rotating the first output shaft of the front handle, the lock tongue can be driven to retract through the inner shaft; wherein the inner shaft and the first output shaft of the front handle are axially plugged in, and after plugging in, the two can transmit torque. In addition, the inner shaft can also drive the locking rod to release the lock of the intermediate cylinder. In one embodiment, the fixed seat assembly also includes a slider, a first elastic body and a second elastic body, the slider is used to drag the lock tongue back and forth, the inner ends of the inner shaft and the intermediate cylinder are respectively connected to the slider, the first elastic body is used to push the slider to move outward, and the second elastic body is used to push the locking rod from the locked position to the unlocked position, the locking rod includes a main rod body and a blocking part and a clamping part provided on the main rod body; when the locking rod moves to the locked position, the blocking part is hooked to the slider, and the clamping part is clamped to the first stop groove and the second stop groove, at this time, the slider is driven to move inward by rotating the inner shaft, so that the slider is separated from the blocking part, and the locking rod moves from the locked position to the unlocked position under the action of the second elastic body.

[0014] The locking rod is a rod-shaped connecting member movably disposed in the lock body housing. The locking rod is used to connect the intermediate cylinder and the outer cylinder together to limit the rotation of the intermediate cylinder. In one embodiment, the outer cylinder is provided with a first retaining groove, and the intermediate cylinder is provided with a second retaining groove. The locking rod can move between a locked position and an unlocked position. When the locking rod moves to the locked position, the locking rod is simultaneously engaged with the first retaining groove and the second retaining groove to prevent the intermediate cylinder from rotating. Furthermore, one end of the locking rod extends rearward into the rear lock assembly, and the rear lock assembly is provided with a locking button. Pressing the locking button drives the locking rod to move to the locked position.

[0015] According to the above technical solution, compared with the prior art, the beneficial technical effects of the present invention are: First, the front lock assembly and the fixing base assembly form a detachable connection structure through the connecting device. Since the main control components are arranged in the front lock assembly, when the front lock assembly needs to be maintained, the front lock assembly can be separated from the fixing base assembly by simply releasing the lock of the connecting device. The disassembled front lock assembly does not need to be repaired on site, and the lock can be repaired by replacing a new front lock assembly, which greatly improves the efficiency and convenience of assembly, disassembly and maintenance, and well solves the problem of "complete disassembly and repair" in the prior art. Second, the outer cylinder shields the connecting device from the outside. When the lock tongue is extended, the avoidance hole of the outer cylinder and the connecting device are staggered. When disassembling the front lock assembly, the front lock assembly needs to be rotated to allow the connecting device to rotate to a position aligned with the avoidance hole. This arrangement not only ensures the overall aesthetics of the lock, but also facilitates disassembly of the front lock assembly. Third, the disassembly of the front lock assembly is linked to the connection action of the clutch and the locking action of the locking lever. On the one hand, when the locking lever is in the locked position, the second output shaft of the front handle and the intermediate cylinder are locked and cannot rotate. Only after the locking lever is switched to the unlocked position can the front handle housing drive the second output shaft of the front handle and the intermediate cylinder to rotate so that the connecting device is aligned with the avoidance hole, which effectively prevents the front lock assembly from being disassembled when the lock is in the locked state. On the other hand, in order to switch the locking lever to the unlocked position, the clutch structure in the front lock assembly is used to control the clutch from outside the door to release the connection between the second output shaft of the front handle and the front handle. The first output shaft of the front handle can drive the inner shaft to rotate relative to the second output shaft of the front handle, and the rotation of the inner shaft causes the locking lever to switch to the unlocked position. In this way, the clutch disengagement action and the locking lever switching to the unlocked position are combined and linked together, so that the front lock assembly cannot be disassembled in the locked state. The front lock assembly can only be rotated and disassembled when the clutch is disconnected and the locking lever is switched to the unlocked position, greatly improving the safety of use and the convenience of disassembly of the lock.

[0016] Since the present invention has the above characteristics and advantages, it can be applied to locks with detachable front lock components. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the lock's axial structure; Figure 2 It is a schematic diagram of the cross-sectional structure of the lock; Figure 3 This is a schematic diagram of the lock's exploded structure; Figure 4 This is a schematic diagram of the axial structure of the front lock assembly; Figure 5 is a schematic cross-sectional view of the front lock assembly, showing the connection between the front handle and the second output shaft of the front handle; Figure 6 is a schematic cross-sectional structural diagram of the front lock assembly, showing the front handle and the second output shaft of the front handle separated; Figure 7 This is a schematic diagram of the exploded structure of the front lock assembly; Figure 8is a schematic cross-sectional view of the fixing base assembly, showing the locking lever in a locked position; Figure 9 is a schematic cross-sectional view of the fixing base assembly, showing the locking lever in an unlocked position; Figure 10 is a schematic diagram of the structure in the axial direction when the intermediate cylinder is connected to the second output shaft of the front handle; Figure 11 is a schematic structural diagram of the intermediate cylinder in the axial direction; Figure 12 is a schematic structural diagram of the first output shaft of the front handle in the axial direction; Figure 13 is a schematic structural diagram of the second output shaft of the front handle in the axial direction; Figure 14 It is a schematic diagram of the axial structure of the elastic buckle. DETAILED DESCRIPTION

[0018] The structure of the lock with a detachable front lock assembly according to the technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0019] Except for those explicitly stated to be equivalent or alternative implementation schemes, the various implementation details disclosed below can be selectively applied or combined in one embodiment even if they have no direct correlation or synergistic relationship in terms of function.

[0020] like Figures 1 to 14As shown, a lock with a detachable front lock assembly proposed by the present invention includes a front lock assembly 1 and a fixing seat assembly 2, the fixing seat assembly 2 is used to be fixedly connected to the door leaf, and the front lock assembly 1 is detachably connected to the fixing seat assembly 2; the front lock assembly 1 includes a front handle 11, the front handle 11 includes a front handle shell 3 and a front handle first output shaft 5 fixedly connected to the front handle shell 3; the front lock assembly 1 also includes a front handle second output shaft 6, a clutch 12 and an unlocking device 13; the front handle second output shaft 6 is connected to the front handle 11 through the clutch 12, the front handle second output shaft 6 includes a cylindrical front handle connecting cylinder 61, and the front handle first output shaft 5 extends In the front handle connecting tube 61, a rotation angle limiting device 14 is further provided between the front handle 11 and the front handle second output shaft 6, and the rotation angle limiting device 14 is used to limit the relative rotation of the front handle 11 and the front handle second output shaft 6 within a limited angle range; the unlocking device 13 is used to control the clutch action of the clutch 12, and the clutch 12 is used to control whether the front handle 11 and the front handle second output shaft 6 rotate relative to each other. When the unlocking device 13 confirms the legal door opening signal, the clutch 12 separates the front handle 11 and the front handle second output shaft 6, thereby allowing the front handle 11 and the front handle second output shaft 6 to rotate relative to each other within a limited angle range, otherwise the front handle 1 1 is connected to the second output shaft 6 of the front handle and can rotate synchronously; the fixed seat assembly 2 includes a lock body 21, and the lock body 21 includes a lock body shell 211 and a lock tongue 212 that can be telescopically moved at the opening of the lock body shell 211; the fixed seat assembly 2 also includes an outer cylinder member 22 fixedly connected to the lock body shell 211, and a rotatable intermediate cylinder member 23 is installed on the inner side of the outer cylinder member 22, the inner side end of the intermediate cylinder member 23 is transmission-connected to the lock tongue 212, and the outer side end is used for detachably connecting to the front handle connecting cylinder 61 of the second output shaft 6 of the front handle; the inner side of the intermediate cylinder member 23 is provided with a rotatable inner shaft member 24, and the inner end of the inner shaft member 24 is also transmission-connected to the lock tongue 212 , the outer end is used to detachably connect the first output shaft 5 of the front handle; the intermediate cylinder member 23 and the inner shaft member 24 can rotate independently to drive the lock tongue 212 to retract; the fixed seat assembly 2 also includes a locking rod 25, and the locking rod 25 is used to lock the rotation of the intermediate cylinder member 23; it also includes a connecting device, when the second output shaft 6 of the front handle is connected to the intermediate cylinder member 23, the locking is achieved by the connecting device. When the second output shaft 6 of the front handle is connected to the intermediate cylinder member 23, the outer end of the inner shaft member 24 is also detachably connected to the first output shaft 5 of the front handle along the axial direction, so that the first output shaft 5 of the front handle is linked to the inner shaft member 24, and the connecting device is placed on the inner side of the outer cylinder member 22;A circumvention hole 221 corresponding to the connecting device is provided on the outer cylinder 22. When the lock tongue 212 is extended outward and is in a locked state, the circumvention hole 221 is staggered with the connecting device. When unlocking the door, the clutch 12 is separated after the unlocking device 13 confirms the legal door opening signal. The front handle shell 3 rotates with the front handle first output shaft 5 and the inner shaft 24 relative to the front handle second output shaft 6 and the intermediate cylinder 23 within a limited angle range. When the inner shaft 24 rotates to the edge of the limited angle range, it can drive the locking rod 25 to release the action. To lock the intermediate cylinder 23, the front handle housing 3 can continue to rotate, further rotating the front handle second output shaft 6 and the intermediate cylinder 23, thereby driving the lock tongue 212 to retract and complete the door opening. Simultaneously, the door opening is completed, and the connecting device is rotated to a position aligned with the avoidance hole 221. A tool is then inserted through the avoidance hole 221 to unlock the connecting device. Simultaneously, the front handle housing 3 is pulled outward to disengage the front handle first output shaft 5 and the front handle second output shaft 6 from the inner shaft 24 and the intermediate cylinder 23, respectively, thereby removing the front lock assembly 1.

[0021] The front lock assembly 1 is a driving component mounted on the front side (i.e., the outside of the door leaf) of the door leaf. It allows a user outside the room to operate the front lock assembly 1 to release the clutch 12 from its connected state, unlock the lock tongue 212, and unlock the door leaf. The front lock assembly 1 and the fixing base assembly 2 can be removed and installed separately. Accordingly, the lockset also includes a rear lock assembly 4 mounted on the rear side of the door leaf. This rear lock assembly 4 allows a user inside the room to operate the door to open or lock it.

[0022] The front handle first output shaft 5 is a shaft-shaped member used to connect to the inner shaft 24. The front handle first output shaft 5 and the inner shaft 24 are detachably connected along the axial direction. The front handle first output shaft 5 and the inner shaft 24 can be connected and disconnected by simply plugging and unplugging. In addition, the front handle first output shaft 5 is fixedly connected to the front handle housing 3. Therefore, rotating the front handle housing 3 can rotate the front handle first output shaft 5 together, thereby driving the inner shaft 24 to rotate.

[0023] The front handle second output shaft 6 is a component that is rotationally connected to the front handle 11, that is, the front handle second output shaft 6 can be rotationally connected to the front handle housing 3 or the front handle first output shaft 5. In this embodiment, the front handle second output shaft 6 includes a cylindrical front handle connecting tube 61 and an annular member 62. The annular member 62 extends radially outward from the root of the front handle connecting tube 61, and the outer edge of the annular member 62 is aligned with the end opening of the front handle housing 3. That is, the front handle second output shaft 6 is covered at the end opening of the front handle housing 3. The front handle second output shaft 6 and the front handle housing 3 together form the outer shell portion of the front lock assembly 1. The front handle first output shaft 5 extends axially into the front handle connecting tube 61 of the front handle second output shaft 6, and also includes a retaining spring. The front handle first output shaft 5 is rotationally connected to the front handle second output shaft 6 via the retaining spring.

[0024] The clutch 12 is a movable component disposed within the housing formed by the front handle second output shaft 6 and the front handle housing 3. Driven by the unlocking device 13, the clutch 12 is capable of reciprocating movement, controlling the connection and disconnection between the front handle 11 and the front handle second output shaft 6. In this embodiment, the clutch 12 connects the front handle first output shaft 5 and the front handle second output shaft 6. The clutch 12 is an axially extending columnar structure, movably disposed on the front handle first output shaft 5. A receiving groove 66 is provided on the annular member 62 of the front handle second output shaft 6. Driven by the unlocking device 13, the clutch 12 moves radially and inserts one end into the receiving groove 66, thereby connecting the front handle housing 3 to the front handle second output shaft 6. Rotating the front handle housing 3 then rotates the front handle second output shaft 6. In addition, a return spring 121 is included. When the unlocking device 13 is reset and disengaged from the clutch 12, the clutch 12 retracts into the first front handle output shaft 5 under the action of the return spring 121. In this way, the first front handle output shaft 5 is separated from the second front handle output shaft 6. At this time, rotating the front handle housing 3 can only drive the first front handle output shaft 5 to rotate relative to the second front handle output shaft 6. Of course, in another embodiment, the same function can be achieved by connecting the clutch 12 to the front handle housing 3 and the second front handle output shaft 6.

[0025] The outer cylinder 22, the intermediate cylinder 23, and the inner shaft 24 are three cylindrical components that are sleeved together on the fixed base assembly 2. The outer cylinder 22 is fixedly connected to the lock body housing 211 and is a non-rotating component. When the fixed base assembly 2 is fixedly connected to the door leaf, the outer cylinder 22 maintains a stable position. The intermediate cylinder 23 and the inner shaft 24 are rotatably mounted within the outer cylinder 22. Each of the intermediate cylinder 23 and the inner shaft 24 can rotate independently relative to the outer cylinder 22. Thus, the front handle first output shaft 5 of the front lock assembly 1 is connected to the intermediate cylinder 23 as one connection structure, and the front handle second output shaft 6 is connected to the inner shaft 24 as another connection structure. Both connection structures can rotate independently relative to each other. Furthermore, the outer cylinder 22 also obscures at least a portion of the intermediate cylinder 23, the inner shaft 24, and the connecting devices provided on the intermediate cylinder 23 and the inner shaft 24.

[0026] The intermediate cylinder member 23 is removably connected to the front handle connecting cylinder 61 of the front handle second output shaft 6 by coupling connecting devices provided on the front handle second output shaft 6 and the intermediate cylinder member 23, respectively. The connecting device comprises an elastic buckle 15 and a buckle hole 16, each provided alternatively on the front handle second output shaft 6 and the intermediate cylinder member 23. When the front handle second output shaft 6 is connected to the intermediate cylinder member 23, the elastic buckle 15 and buckle hole 16 engage to lock the front handle second output shaft 6; removal requires only separating the elastic buckle 15 from the buckle hole 16. Of course, in other equivalent embodiments, the connecting device can also be a removable screw or pin. Furthermore, since the elastic buckle 15 and buckle hole 16 are positioned inside the outer cylinder member 22, when the avoidance hole 221 and the buckle hole 16 are offset, the elastic buckle 15 and the buckle hole 16 are obscured by the outer cylinder member 22, preventing them from being removed.

[0027] The locking lever 25 is a rod-shaped connector movably mounted within the lock housing 211. It connects the intermediate cylinder 23 to the outer cylinder 22, thereby limiting the rotation of the intermediate cylinder 23. In this embodiment, the outer cylinder 22 is provided with a first retaining groove 222, and the intermediate cylinder 23 is provided with a second retaining groove 231. The locking lever 25 is movable between a locked position and an unlocked position. When the locking lever 25 is moved to the locked position, it engages both the first retaining groove 222 and the second retaining groove 231, preventing the intermediate cylinder 23 from rotating. Furthermore, one end of the locking lever 25 extends rearwardly into the rear lock assembly 4, which is provided with a locking button 254. Pressing the locking button 254 activates the locking lever 25 to move to the locked position.

[0028] The inner shaft 24 is a rotatable component rotatably mounted within the intermediate cylinder 23. Its ends are respectively connected to the lock tongue 212 and the front handle first output shaft 5. Rotating the front handle first output shaft 5 drives the lock tongue 212 to retract via the inner shaft 24. The inner shaft 24 and the front handle first output shaft 5 are axially pluggable, enabling torque transmission between the two. Furthermore, the inner shaft 24 can also drive the locking lever 25 to release the lock on the intermediate cylinder 23. In this embodiment, the fixed seat assembly 2 further includes a slider 26, a first elastic body 27, and a second elastic body 28. The slider 26 is used to move the lock tongue 212 back and forth. The inner ends of the inner shaft 24 and the inner ends of the intermediate cylinder 23 are respectively connected to the slider 26, enabling the intermediate cylinder 23 and inner shaft 24 to drive the lock tongue 212 to retract. The first elastic body 27 is used to push the slider 26 to move outward, which also causes the lock tongue 212 to move outward. The second elastic body 28 is used to push the locking rod 25 to move from the locked position to the unlocked position. The locking rod 25 includes a main rod body 251 and a blocking portion 252 and a clamping portion 253 provided on the main rod body 251. Figure 8 As shown, when the locking rod 25 moves to the locking position, the blocking portion 252 is hooked on the slider member 26, and the clamping portion 253 is clamped into the first stop groove 222 and the second stop groove 231. At this time, the slider member 26 is driven to move inward by rotating the inner shaft member 24, so that the slider member 26 is separated from the blocking portion 252, and the locking rod 25 is moved from the locking position to the unlocking position under the action of the second elastic body 28.

[0029] The rotation angle limiting device 14 is a mechanism for limiting the relative rotation of the front handle 11 and the front handle second output shaft 6 within a limited angular range. In this embodiment, the front handle first output shaft 5 is provided with a positioning rib 51, and the front handle second output shaft 6 is provided with a sliding groove 63. When the unlocking device 13 controls the clutch 12 to move and separate the front handle second output shaft 6 from the front handle first output shaft 5, the positioning rib 51 can move back and forth within the sliding groove 63, forming two spaced-apart groove sidewalls 631 of the sliding groove 63 to limit the relative rotation of the front handle 11 and the front handle second output shaft 6 within a limited angular range. In order to achieve this angle limiting function, other equivalent embodiments exist. For example, the positioning rib 51 is provided on the front handle second output shaft 6, and the sliding groove 63 is provided on the front handle first output shaft 5. In addition, since the front handle shell 3 and the front handle first output shaft 5 are fixedly connected together, the sliding groove 63 and the positioning rib 51 can also be respectively set on the front handle shell 3 and the front handle second output shaft 6 to achieve the same technical effect.

[0030] Furthermore, by adjusting the width of the sliding groove 63, the relative rotation angle range of the front handle 11 and the second front handle output shaft 6 is 30° to 120°. In this embodiment, the relative rotation angle range of the front handle 11 and the second front handle output shaft 6 is set to 90°. Of course, the rotation angle range can also be set to 45°, 60°, or 100° according to different usage requirements.

[0031] In the embodiment of the present invention, Figure 10 As shown, the inner diameter of the second output shaft 6 of the front handle is larger than the outer diameter of the intermediate cylinder 23 . When connected, the second output shaft 6 of the front handle is sleeved on the outside of the intermediate cylinder 23 .

[0032] To facilitate the connection between the second output shaft 6 of the front handle and the intermediate cylinder 23, the elastic buckle 15 includes a buckle seat 151 and a connecting leg 152 extending outward from the buckle seat 151. The elastic buckle 15 is disposed in the intermediate cylinder 23. The intermediate cylinder 23 is further provided with a movable hole 232 and a fixed hole 233. The connecting leg 152 is connected to the fixed hole 233, and the buckle seat 151 is movably disposed in the movable hole 232. The advantage of this arrangement is that when the second output shaft 6 of the front handle is plugged into the intermediate cylinder 23, the buckle seat 151 passes through the movable hole 232 and is plugged into the buckle hole 16 of the second output shaft 6 of the front handle to complete the connection. However, the movement of the buckle seat 151 does not affect the stability of the connection between the elastic buckle 15 and the intermediate cylinder 23.

[0033] In order to facilitate the insertion of the second output shaft 6 of the front handle into the set position, the buckle seat 151 is used to accommodate the side of the second output shaft 6 of the front handle and is provided with an accommodating chamfer 153. When the second output shaft 6 of the front handle is sleeved on the intermediate cylinder 23, the second output shaft 6 of the front handle pushes the accommodating chamfer 153 of the buckle seat 151 so that the buckle seat 151 retreats into the movable hole 232. When the buckle hole 16 of the second output shaft 6 of the front handle moves forward to be aligned with the movable hole 232, the buckle seat 151 extends outward and is buckled into the buckle hole 16, so that the second output shaft 6 of the front handle is locked and connected with the intermediate cylinder 23.

[0034] To facilitate the engagement and positioning of the buckle hole 16 with the buckle seat 151, an orientation groove 64 is provided on the edge of the second output shaft 6 of the front handle. The orientation groove 64 is trumpet-shaped, with the outer opening of the wider side of the orientation groove 64 facing outward, and the width of the outer opening of the orientation groove 64 is smaller than the width of the buckle seat 151. A first orientation protrusion 154 is provided on the engaging chamfer 153. The width of the outer opening of the orientation groove 64 is larger than the width of the first orientation protrusion 154. When the second output shaft 6 of the front handle is sleeved on the intermediate cylinder 23, the outer opening of the orientation groove 64 is positioned and connected to the buckle seat 151 through the positioning clamp of the first orientation protrusion 154. Furthermore, the buckle hole 16 is axially arranged on the upper side of the orientation groove 64. In this way, after the second output shaft 6 of the front handle is sleeved on the intermediate cylinder 23, it only needs to continue to move a certain distance in the axial direction to allow the elastic buckle 15 to be snapped into the buckle hole 16.

[0035] Of course, the connection method between the second output shaft 6 of the front handle and the intermediate cylinder 23 is also flexible and diverse. In another equivalent embodiment, the inner diameter of the second output shaft 6 of the front handle is smaller than the outer diameter of the intermediate cylinder 23. When connected, the intermediate cylinder 23 is sleeved on the outside of the second output shaft 6 of the front handle. At this time, the elastic buckle 15 is set on the second output shaft of the front handle 6, and the buckle hole 16 is set on the intermediate cylinder 23, which can also realize the detachable connection structure between the second output shaft 6 of the front handle and the intermediate cylinder 23.

[0036] Furthermore, an axially extending drive rib 65 is provided on the inner side of the front handle second output shaft 6, and a drive groove 234 is provided on the intermediate cylinder 23 to match the drive rib 65. When the front handle second output shaft 6 is sleeved onto the intermediate cylinder 23, the drive rib 65 engages with the drive groove 234. This arrangement has the advantage that, during installation, the drive rib 65 and the drive groove 234 serve as guides to guide the insertion of the front handle second output shaft 6 into the intermediate cylinder 23. Furthermore, the drive rib 65 forms a pin-key transmission structure similar to that in a shaft transmission structure, making the transmission between the two cylindrical components more stable.

[0037] The unlocking device 13 is a driving component disposed within a housing formed by the front handle second output shaft 6 and the front handle housing 3. Common unlocking devices 13 include a mechanical lock cylinder 131 or an electric actuator 132 with a signal identifier 133. In this embodiment, the unlocking device 13 includes a mechanical lock cylinder 131, which rotates to drive the clutch 12 back and forth, thereby controlling the connection or disconnection of the front handle second output shaft 6 from the front handle 11. The unlocking device 13 also includes an electric actuator 132 and a signal identifier 133. After the signal identifier 133 inputs preset identity information, the electric actuator 132 drives the clutch 12 to move away from the front handle second output shaft 6, thereby connecting or disconnecting the front handle second output shaft 6 from the front handle 11. Among them, the signal identifier 133 includes a password keyboard, a touch screen, an ID card or IC card interface, an NFC induction coil, a Bluetooth receiver, a fingerprint or vein feature identifier or a portrait video collector, etc. The clutch 12 is configured so that the electric drive 132 performs an instantaneous separation action of 1 to 5 seconds after the signal identifier 133 receives a legal instruction.

[0038] Furthermore, the front lock assembly 1 also includes a timer. After the electric driver 132 drives the clutch 12 to move away from the second output shaft 6 of the front handle, when the timer reaches a preset time, the electric driver 132 moves in the opposite direction away from the clutch 12, and the clutch 12 is connected to the second output shaft 6 of the front handle under the action of the return spring, or the electric driver 132 directly drives the clutch 12 to connect to the second output shaft 6 of the front handle.

[0039] For ease of operation, the unlocking device 13 is typically mounted on the front handle housing 3, with some operating components exposed, such as the keyhole, password keypad, touch screen, or camera. However, some contactless identification devices (such as a Bluetooth receiver or NFC induction coil) can be installed within the housing without being exposed. Accordingly, the legitimate door unlocking signal refers to the key for the corresponding mechanical lock cylinder 131, the correct password, the correct fingerprint or facial signal, and the correct wireless key.

[0040] According to the above technical solution, compared with the prior art, the beneficial technical effects of the present invention are: First, the front lock assembly 1 and the fixing base assembly 2 form a detachable connection structure through the elastic buckle 15 and the buckle hole 16. Since the main control components are arranged in the front lock assembly 1, when the front lock assembly 1 needs to be maintained, the front lock assembly 1 can be separated from the fixing base assembly 2 by simply pressing the elastic buckle 15. The disassembled front lock assembly 1 does not need to be repaired on site, and the lock can be repaired by replacing a new front lock assembly 1, which greatly improves the efficiency and convenience of assembly, disassembly and maintenance, and well solves the problem of "complete disassembly and repair" in the prior art. Second, the outer cylinder 22 blocks the elastic buckle 15 and the buckle hole 16 on the outside. When the lock tongue 212 is extended, the avoidance hole 221 of the outer cylinder 22 is staggered with the buckle hole 16. When disassembling the front lock assembly 1, the front lock assembly 1 needs to be rotated to allow the buckle hole 16 to rotate to a position aligned with the avoidance hole 221. This ensures the overall aesthetics of the lock and facilitates disassembly of the front lock assembly 1. Third, the disassembly of the front lock assembly 1 is related to the connecting action of the clutch 12 and the locking action of the locking rod 25. On the one hand, when the locking rod 25 is in the locked position, the front handle second output shaft 6 and the intermediate cylinder 23 are locked and cannot rotate. Only after the locking rod 25 is switched to the unlocked position, the front handle housing 3 can drive the front handle second output shaft 6 and the intermediate cylinder 23 to rotate so that the buckle hole 16 is aligned with the avoidance hole 221, which effectively prevents the front lock assembly 1 from being disassembled when the lock is in the locked state; on the other hand, in order to switch the locking rod 25 to the unlocked position, the clutch 12 structure in the front lock assembly 1 is utilized. By controlling the clutch 12 outside the door to release the connection between the front handle second output shaft 6 and the front handle housing 3, the front handle first output shaft 5 can drive the inner shaft 24 to rotate relative to the front handle second output shaft 6, and the rotation of the inner shaft 24 allows the locking rod 25 to switch to the unlocked position; in this way, the separation action of the clutch 12 and the switching action of the locking rod 25 to the unlocked position are combined and linked together, so that the front lock assembly 1 cannot be removed in the locked state, and the front lock assembly 1 can only be removed when the clutch 12 is disconnected and the locking rod 25 is switched to the unlocked position, which greatly improves the safety of use and the convenience of disassembly of the lock.

Claims

1. A lock with a detachable front lock assembly, characterized in that: The lock comprises a front lock assembly and a fixing seat assembly, wherein the fixing seat assembly is used to be fixedly connected to the door leaf, and the front lock assembly is detachably connected to the fixing seat assembly; The front lock assembly includes a front handle, the front handle including a front handle housing and a first front handle output shaft fixedly connected to the front handle housing; the front lock assembly also includes a second front handle output shaft, a clutch, and an unlocking device; the second front handle output shaft is connected to the front handle via the clutch, the second front handle output shaft includes a cylindrical front handle connecting cylinder, the first front handle output shaft extends into the front handle connecting cylinder, and a rotation angle limiting device is further provided between the front handle and the second front handle output shaft, the rotation angle limiting device being used to limit relative rotation between the front handle and the second front handle output shaft within a limited angle range; The unlocking device is used to control the clutch action of the clutch, and the clutch is used to control whether the front handle and the second output shaft of the front handle rotate relative to each other through the clutch action. When the unlocking device confirms a legitimate door opening signal, the clutch separates the front handle and the second output shaft of the front handle, thereby allowing the front handle and the second output shaft of the front handle to rotate relative to each other within a limited angle range. Otherwise, the front handle and the second output shaft of the front handle are connected and can rotate synchronously. The fixing seat assembly includes a lock body, which includes a lock body shell and a lock tongue that can be telescopically moved at the opening of the lock body shell; the fixing seat assembly also includes an outer cylinder member fixedly connected to the lock body shell, an intermediate cylinder member that can rotate is installed on the inner side of the outer cylinder member, the inner side end of the intermediate cylinder member is transmission-connected to the lock tongue, and the outer side end is used for detachably connecting the front handle connecting cylinder of the second output shaft of the front handle; the inner side of the intermediate cylinder member is provided with a rotatable inner shaft member, the inner side end of the inner shaft member is also transmission-connected to the lock tongue, and the outer side end is used for detachably connecting to the first output shaft of the front handle; the intermediate cylinder member and the inner shaft member can rotate independently to drive the lock tongue to retract; the fixing seat assembly also includes a locking rod, which is used to lock the rotation of the intermediate cylinder member; The invention also includes a connecting device, wherein when the second output shaft of the front handle is connected to the intermediate cylinder member, locking is achieved through the connecting device. When the second output shaft of the front handle is connected to the intermediate cylinder member, the outer end of the inner shaft member is also detachably connected to the first output shaft of the front handle in the axial direction, so that the first output shaft of the front handle and the inner shaft member form a linkage. The connecting device is placed on the inner side of the outer cylinder member; an avoidance hole corresponding to the connecting device is provided on the outer cylinder member, and when the lock tongue is extended outward and is in a locked state, the avoidance hole and the connecting device are staggered. When unlocking and opening the door, the clutch disengages after the unlocking device confirms a legal door opening signal, and the front handle shell rotates, driving the front handle first output shaft and the inner shaft to rotate relative to the front handle second output shaft and the intermediate cylinder within a limited angle range. When the inner shaft rotates to the edge of the limited angle range, it can drive the locking rod to release the lock of the intermediate cylinder, and the front handle shell can continue to rotate to further drive the front handle second output shaft and the intermediate cylinder to rotate, thereby driving the lock tongue to retract to complete the door opening; while completing the door opening, the connecting device is also rotated to a position aligned with the avoidance hole. At this time, a tool is used to pass through the avoidance hole to release the lock of the connecting device, and at the same time, the front handle shell is pulled outward to allow the front handle first output shaft and the front handle second output shaft to respectively disengage from the inner shaft and the intermediate cylinder to remove the front lock assembly.

2. The lock with a detachable front lock assembly according to claim 1, characterized in that: The connecting device includes an elastic buckle and a buckle hole, and the elastic buckle and the buckle hole are respectively arranged on the second output shaft of the front handle and the intermediate cylinder in an alternative manner.

3. The lock with a detachable front lock assembly according to claim 2, characterized in that: The buckle hole is arranged on the second output shaft of the front handle, and the elastic buckle is arranged in the intermediate cylinder. The elastic buckle includes a buckle seat and a connecting leg extending outward from the buckle seat. A movable hole and a fixed hole are also provided on the intermediate cylinder. The connecting leg is connected to the fixed hole, and the buckle seat is movably arranged in the movable hole.

4. The lock with a detachable front lock assembly according to claim 3, characterized in that: The buckle seat is provided with an engaging chamfer on one side for engaging with the second output shaft of the front handle. When the second output shaft of the front handle is sleeved on the intermediate cylinder, the second output shaft of the front handle pushes the engaging chamfer of the buckle seat so that the buckle seat retreats into the movable hole. When the buckle hole of the second output shaft of the front handle moves forward to be aligned with the movable hole, the buckle seat extends outward and buckles into the buckle hole, thereby locking the second output shaft of the front handle and the intermediate cylinder together.

5. The lock with a detachable front lock assembly according to claim 4, characterized in that: An orientation groove is provided on the edge of the second output shaft of the front handle, and the orientation groove is trumpet-shaped. The outer opening of the side with a larger width of the orientation groove is arranged outward, and the width of the outer opening of the orientation groove is smaller than the width of the buckle seat; a first orientation protrusion is provided on the meeting chamfer, and the width of the outer opening of the orientation groove is larger than the width of the first orientation protrusion. When the second output shaft of the front handle is sleeved on the intermediate cylinder, the outer opening of the orientation groove is clamped onto the buckle seat through the first orientation protrusion.

6. The lock with a detachable front lock assembly according to claim 3, characterized in that: A driving rib extending in the axial direction is also provided on the inner side of the second output shaft of the front handle, and a driving groove matching the driving rib is provided on the intermediate cylinder. When the second output shaft of the front handle is sleeved onto the intermediate cylinder, the driving rib is inserted into the driving groove.

7. The lock with a detachable front lock assembly according to claim 1, characterized in that: A first stop groove is provided on the outer cylinder member, and a second stop groove is provided on the intermediate cylinder member. The locking rod can move between a locking position and an unlocking position. When the locking rod moves to the locking position, the locking rod is simultaneously engaged with the first stop groove and the second stop groove to prevent the intermediate cylinder member from rotating.

8. The lock with a detachable front lock assembly according to claim 7, characterized in that: The fixing seat assembly further includes a slider, a first elastic body and a second elastic body, the slider is used to drag the lock tongue to move back and forth, the inner ends of the inner shaft and the intermediate cylinder are respectively connected to the slider, the first elastic body is used to push the slider to move outward, the intermediate cylinder and the inner shaft can independently rotate to overcome the force of the first elastic body to drive the slider to move inward so that the lock tongue retracts, the second elastic body is used to push the locking rod to move from the locked position to the unlocked position, the locking rod is arranged to extend along the axial direction, and the locking rod includes a main rod body and a blocking portion and a clamping portion provided on the main rod body; When the locking rod moves to the locking position, the blocking portion is hooked on the slider member, and the clamping portion is clamped into the first stop groove and the second stop groove. At this time, the slider member is driven to move inward by rotating the inner shaft member, thereby separating the slider member from the blocking portion. The locking rod moves from the locking position to the unlocking position under the action of the second elastic body.

9. The lock with a detachable front lock assembly according to claim 1, characterized in that: The front handle housing and the second output shaft of the front handle are respectively provided with sliding grooves and positioning ribs. When the unlocking device controls the clutch to move and separate the second output shaft of the front handle from the front handle, the positioning rib can move back and forth in the sliding groove to limit the relative rotation angle range of the front handle and the second output shaft of the front handle.

10. The lock with a detachable front lock assembly according to claim 9, characterized in that: The relative rotation angle between the front handle and the second output shaft of the front handle is in the range of 30° to 120°.

11. The lock with a detachable front lock assembly according to claim 1, characterized in that: The unlocking device includes a mechanical lock core, and the mechanical lock core drives the clutch to move back and forth by rotating, thereby controlling the second output shaft of the front handle to be connected to or separated from the front handle.

12. The lock with a detachable front lock assembly according to claim 1, characterized in that: The unlocking device includes an electric driver and a signal identifier. After the signal identifier inputs preset identity information, the electric driver drives the clutch to move away from the second output shaft of the front handle, thereby connecting or disconnecting the second output shaft of the front handle.

13. The lock with a detachable front lock assembly according to claim 12, characterized in that: It also includes a return spring. Under the action of the return spring, the clutch moves and is coupled to the second output shaft of the front handle, so that the second output shaft of the front handle is connected to the front handle.

14. The lock with a detachable front lock assembly according to claim 13, characterized in that: The front lock assembly also includes a timer. After the electric drive drives the clutch to move away from the second output shaft of the front handle, when the timer reaches a preset time, the electric drive moves in the opposite direction away from the clutch, and the clutch is connected to the second output shaft of the front handle under the action of the return spring, or the electric drive directly drives the clutch to connect to the second output shaft of the front handle.

15. The lock with a detachable front lock assembly according to claim 12, wherein: The signal identifier is a password recognition device or a biometric recognition device.

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