CN219081266U - Keyless back lock and locking device - Google Patents

Abstract

The utility model discloses a keyless back lock and a locking device, comprising: a main driving assembly capable of receiving a rotational force to rotate within a limited range; a clutch positioning assembly comprising two ends, one hinged relative to the object to be locked and the other held in a first or second positioning position by a spring force; the clutch assembly is hinged with the other end part of the clutch positioning assembly, can receive the rotation of the main driving assembly to move, is separated from the main driving assembly after the main driving assembly moves to the limit position, and the locking assembly comprises a lock tongue which moves relative to an object to be locked, and can be driven by the clutch assembly to move from a release state which can freely move relative to a fixed object to a locking position and form a lock tongue back locking state with the fixed object. Through the keyless back lock according to the technical scheme, the use efficiency and safety of the lock can be greatly improved, and the keyless back lock is simple in structure, high in cost and maintainability and more suitable for being used in a general scene.

Description

Keyless back lock and locking device

Technical Field

The utility model relates to the technical field of locks, in particular to a keyless back lock.

Background

Lockset refers to an appliance which plays a role in sealing and is used in a large number for every family; commercial use; an office location; public facilities, etc.;

a complete mechanical lock includes a lock body, a lock cylinder, and a key.

Nowadays, a large number of mechanical door locks are used to lock the door only by means of a key, which is very inconvenient for the elderly, children, disabled, infants and people with inconvenient hands.

How to solve the key-free locking door of the mechanical door lock becomes a technical problem to be solved urgently.

Disclosure of Invention

A first aspect of the present utility model provides a keyless back lock for being fixedly connected to an object to be locked and back-locking or releasing the object to be locked with respect to a fixed object, the keyless back lock comprising: the clutch positioning assembly comprises two end parts, one end part is hinged to the object to be locked, the other end part of the clutch positioning assembly can be kept at a first positioning position or a second positioning position through spring force, the clutch assembly is hinged to the other end part of the clutch positioning assembly, the clutch assembly can unidirectionally accept rotation of the main driving assembly to move, and can be separated from the main driving assembly under the driving of the clutch positioning assembly after the main driving assembly moves to the limit position of the limit range, and the locking assembly comprises a lock tongue capable of moving relative to the object to be locked, the lock tongue can be driven by the clutch assembly to move to a locking position from a release state capable of freely moving relative to a fixed object, and can form a locking state with the fixed object to be locked when the lock tongue moves to the locking position, so that the object to be locked is locked relative to the fixed object.

In some embodiments, the locking assembly is operable to effect a tongue-locking reaction by the clutch assembly when the main drive assembly is rotated in a first direction and is disengaged from the clutch assembly when the main drive assembly is rotated in a second direction opposite the first direction.

In some embodiments, the clutch assembly includes a clutch lever that, when driven by movement of the main drive assembly in a first direction, drives the locking assembly to change to a tongue-and-lock state.

In some embodiments, the device further comprises an unlocking component, wherein the unlocking component can be accessed from the outside, and after the unlocking component is authenticated by an authentication mechanism and passes the authentication, the clutch component is driven to move, and then the locking component is driven to change from the back locking state to the release state.

In some embodiments, the clutch assembly has a first driving portion and a second driving portion, the first driving portion is capable of being driven by the motion of the main driving assembly along the first direction to move in a locking direction, and the second driving portion is capable of being driven by the unlocking assembly to move in an unlocking direction.

In some embodiments, the main drive assembly comprises a knob, the unlocking assembly comprises a lock cylinder and an unlocking drive connected with the lock cylinder, and the unlocking assembly can drive the locking assembly to rotate to a release state along a second direction after the unlocking mechanism is verified; and the unlocking component can drive the locking component to rotate to the back locking state along the first direction after the unlocking mechanism is verified.

In some embodiments, the clutch assembly includes a central bore for passage of the unlocking assembly, a clutch assembly receiving cavity for receiving the unlocking drive, and a clutch drive for receiving drive of the main drive assembly and the unlocking assembly.

In some embodiments, the clutch assembly includes a plate-shaped body, a central hole is disposed at a central portion of the plate-shaped body, the clutch driving portion is fan-shaped plate-shaped and disposed at a circumferential outer side of the plate-shaped body, and the clutch driving portion and the plate-shaped body are provided with a recess along an axial direction, and the recess defines the clutch assembly accommodating cavity.

In some embodiments, the clutch positioning assembly comprises a first torsion spring fixing part arranged on the clutch assembly, a second torsion spring fixing part arranged on the housing, and a torsion spring arranged between the first torsion spring fixing part and the second torsion spring fixing part, wherein the relative positions of the first torsion spring fixing part and the second torsion spring fixing part are set to be the first positioning position or the second positioning position when the clutch assembly rotates, and the torsion spring can push the clutch positioning assembly to be kept at the first positioning position or the second positioning position when the clutch assembly moves relative to the housing.

In some embodiments, the primary drive assembly includes a primary drive clutch positioning assembly.

The present utility model provides in a second aspect a locking device comprising a lock as described above.

Drawings

Fig. 1 is a schematic perspective view of a lock according to a first embodiment of the present utility model;

FIG. 2 is an exploded perspective view of the lock according to the first embodiment of the present utility model;

FIG. 3 is another exploded perspective view of the lock of the first embodiment provided by the present utility model;

FIG. 4 is a further exploded perspective view of the lock of the first embodiment provided by the present utility model;

fig. 5 is a schematic perspective view of a lock according to a second embodiment of the present utility model;

FIG. 6 is an exploded perspective view of a second embodiment of the lock of the present utility model;

FIG. 7 is another exploded perspective view of a second embodiment of the lock provided by the present utility model;

FIG. 8 is an exploded perspective view of a third embodiment of the lock of the present utility model;

FIG. 9 is another exploded perspective view of a third embodiment of the lock provided by the present utility model;

FIG. 10a is a schematic perspective view showing an internal structure of the lock according to the third embodiment of the present utility model, wherein the rear cover is removed and the lock is in an unlocked state;

FIG. 10b is a schematic perspective view showing another internal structure of the lock according to the third embodiment of the present utility model, wherein the rear cover is removed, and the lock is in a state of being locked by the knob;

FIG. 11a is a rear view of the third embodiment of the lock of the present utility model with the rear cover removed and the lock in an unlocked state;

FIG. 11b is another rear view of the third embodiment of the lock provided by the present utility model with the rear cover removed and the lock in a knob-driven locked state;

FIG. 11c is another rear view of the third embodiment of the lock provided by the present utility model with the rear cover removed, the lock being in a key-actuated locked state;

FIG. 11d is another rear view of the third embodiment of the lock provided by the present utility model with the rear cover removed, the lock being in a key-actuated unlocked state;

fig. 12 is a schematic perspective view of a locking device including a lock according to a first embodiment of the present utility model.

Fig. 13 is a schematic perspective view of a locking device including a lock according to a second embodiment of the present utility model.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The implementation of the present utility model will be described in detail below with reference to specific embodiments.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.

Referring to fig. 1-3, a first embodiment of the present utility model is provided.

The lock 100 according to the first embodiment of the present utility model includes a face housing 10, a housing 12 fixed to an inner side of the face housing 10, a knob 22 rotatably disposed with respect to the housing 12, an unlocking assembly for being engaged with a key and driven thereby, and a clutch assembly 26 and a locking assembly 32 disposed inside the housing 12.

Referring to fig. 1 and 2, the face shell 10 and the housing 12 are both substantially rectangular and open to one side, and are formed in a semicircular shape along one end of the side length, and the housing 12 is nested inside the face shell 10. A through hole and an arc hole outside the through hole are formed in a side surface of the face case 10 and the case 12 opposite to the open side. The knob 22 is generally annular, the unlocking component is disposed at a central position of the knob 22, the knob 22 includes a knob driving lever 222, the unlocking component includes a driving connector 242, after the knob 22 and the unlocking component are assembled and mounted on the face-piece 10, the knob driving lever 222 of the knob 22 is inserted into the arc-shaped hole, and the driving connector 242 of the unlocking component is inserted into the through hole.

Referring to fig. 2 and 3, the unlocking assembly includes a lock core 24 and an unlocking driving member 28, a portion of the lock core 24 facing the outside of the lock is provided with a key hole for inserting a matched key to unlock, a driving connector 242 extending into the face shell 10 and the housing 12 is provided on one side of the lock core 24 facing the inside of the lock, and the unlocking driving member 28 is clamped on the driving connector 242. The clutch assembly 26 includes a central aperture 260 for passage of the unlocking assembly, a clutch assembly receiving cavity 266 for receiving the unlocking drive 28, and a clutch drive 268 for receiving drive of the main drive assembly and the unlocking assembly. Specifically, the clutch assembly 26 includes a circular plate-like body 269, and the central bore 260 is a through hole that is disposed through a central portion of the plate-like body 269. The clutch driving portion 268 is in a fan-like plate shape provided on the circumferential outer side of the plate-like body 269, and the clutch driving portion 268 and the plate-like body 269 are provided with a recess in the axial direction facing the inside of the lock facing away from the knob 22, the recess defining the clutch assembly accommodating chamber 266. The clutch assembly 26 is also provided with a clutch lever 267 extending inward of the lock. In the present embodiment, the recess is formed by a height difference between the plate-like body 269 and the clutch driving portion 268, that is, a surface of the plate-like body 269 facing the inside of the lock in the axial direction is lower than a surface of the clutch driving portion 268 facing the inside of the lock in the axial direction. The clutch driving portion 268 has a first driving portion 262 and a second driving portion 264, and in the present embodiment, the first driving portion 262 and the second driving portion 264 are truncated edge portions of both sides of the fan-shaped driving clutch portion 268 in the circumferential direction, respectively. The first driving part 262 can be driven by the motion of the main driving assembly along the first direction to move towards a locking direction, and the second driving part 264 can be driven by the unlocking assembly to move towards an unlocking direction.

The unlocking driving piece 28 and the lock core 24 are respectively arranged at two sides of the clutch assembly 26 along the axial direction, and the unlocking driving piece 28 is clamped in a positioning groove on the driving connector 242 of the center hole 260 of the clutch assembly 26, where the lock core 24 extends into the positioning groove, so that the clutch assembly 26 is clamped together with the lock core 24. The unlocking driving member 28 is substantially in a ring shape, and the circumferential side portion thereof radially protrudes to form an unlocking dial 282, and the unlocking dial 282 is used for driving the second driving portion 264 to move in an unlocking direction. In this embodiment, the radial inner side of the unlocking driving member 28 further includes a fixing protrusion protruding inward in the radial direction, and the fixing protrusions are a pair of opposite square sheet protrusions, and the fixing protrusions are used for being snapped into corresponding radial grooves on the driving connector 242, so as to realize anti-rotation connection.

The knob 22 is also substantially annular, the radially inner side of the knob 22 comprising an inwardly projecting blocking ring 224, which blocking ring 224 is arranged close to the side of the knob 22 facing the inside of the lock and surrounds and delimits with the circumferential side wall of the knob 22 a lock cylinder 24 receiving cavity open towards the outside of the lock, said lock cylinder 24 being arranged in said lock cylinder 24 receiving cavity. The knob lever 222 protrudes from the end surface of the knob 22 facing the inside of the lock, passes through the arc-shaped holes in the face housing 10 and the housing 12 after being mounted, and extends into the lock, and is disposed on the first driving portion 262 side of the clutch driving portion 268, for driving the clutch driving portion 268 to move in a direction forming a counter lock.

The locking assembly 32 includes a latch 322 that can extend and retract from the inside of the lock toward the outside, and a lock drive block 324 that is toggle controlled by the clutch assembly 26. In this embodiment, the locking drive block 324 includes a positioning hole 326 disposed thereon, the positioning hole 326 being formed in a substantially "Y" shape, the two branches of the positioning hole 326 being used to hold the clutch lever 267 in place when the clutch lever 267 is moved to the first positioning position or the second positioning position, respectively. Specifically, the outlines of the two branches of the positioning hole 326 are formed into shapes matching the cross-sectional shapes of the clutch lever 267, and in this embodiment, are rectangular, and the rectangular outlines of the two branches are obliquely arranged at a certain angle corresponding to the orientations of the clutch lever 267 when the clutch lever 267 is located at the first positioning position and the second positioning position, so that when the clutch lever 267 is located at the first positioning position and the second positioning position, the outlines thereof exactly correspond to the rectangular cross-sectional shapes of the corresponding positioning hole 326, thereby being kept.

In addition, the clutch assembly 26 includes a clutch positioning assembly that drives the clutch assembly 26 to maintain either a first positioning position or a second positioning position by a spring force. Wherein, the clutch positioning assembly includes a first torsion spring fixing portion 122 disposed on the clutch driving portion 268, a second torsion spring fixing portion 124 disposed on the housing 12, and a torsion spring 35 disposed between the first torsion spring fixing portion 122 and the second torsion spring fixing portion 124, and the relative positions of the first torsion spring fixing portion 122 and the second torsion spring fixing portion 124 are configured such that when the clutch driving portion 268 rotates, the clutch assembly 26 moves to the first positioning position or the second positioning position relative to the housing 12, and the torsion spring 35 can push the clutch positioning assembly to maintain the position. In this embodiment, the first torsion spring fixing portion 122 is a fixing post disposed on the clutch driving portion 268 and protruding toward the inside of the lock, and the second torsion spring fixing portion 124 is a fixing post disposed in the housing 12 and protruding toward the inside of the lock. The torsion spring 35 is a torsion spring with two legs, and the two legs are respectively connected to the top ends of the two fixing columns. The second torsion spring fixing portion 124 is disposed at a position approximately centered on the upper portion of the housing 12, and the first torsion spring fixing portion 122 is disposed near the first driving portion 262 of the clutch driving portion 268, so that when the clutch assembly 26 is located at the first positioning position, the torsion spring 35 pushes the clutch assembly 26 to maintain the first positioning position, and when the clutch assembly 26 rotates towards the second positioning position against the spring force of the torsion spring under the action of the operating force, the acting force of the torsion spring increases, and the acting direction changes correspondingly due to the relative position change of the two legs. Until the first torsion spring fixing portion 122 passes over the second torsion spring fixing portion 124 (the centered position) to the opposite side of the housing 12, the torsion spring force starts to decrease, and the direction of the pushing force of the torsion spring 35 continues to change, eventually becoming to push the clutch pack 26 to remain in the second positioning position.

In addition, a main driving clutch positioning assembly is also included, which includes a knob lever 222 disposed on the knob 22, a spring fixing post 129 disposed on the inner side of the housing 12, and a return spring 37 connected therebetween. The return spring 37 is used to provide a constant pulling force between the knob stem 222 and the spring fixing post so that the knob 22 can be automatically returned to the original position after being screwed.

In use, the knob 22 is twisted to perform back locking without a key, wherein the knob shifter 222 of the knob 22 shifts the clutch assembly 26 to rotate from the first positioning position to the second positioning position, the torsion spring 35 keeps the clutch assembly 26 thereon, and the clutch shifter 267 shifts the locking driving block 324 to extend the locking tongue 322 to complete locking. The return spring 37 returns the knob 22 to the original position after the driving force is released. When unlocking, a key is inserted into the lock cylinder 24, and the lock cylinder 24 is rotated, the unlocking driving piece 28 of the lock cylinder 24 pushes the clutch assembly 26 kept at the second positioning position to the first positioning position, and the clutch shifting rod 267 shifts the locking driving block 324 to retract the locking tongue 322, so that the back lock is released.

Fig. 5 to 7 show a lock 200 according to a second embodiment of the utility model. Wherein the lock core 124 of the lock comprises a lock ruler 1242. In the present embodiment, the locking rule 1242 is formed in a long strip shape and a thin plate shape, and it is understood that in other embodiments, the locking rule 1242 may be formed in a long strip shape or other shapes. One end of the lock ruler 1242 is connected to a lock cylinder main body 1241 matched with a key, wherein the lock cylinder main body 1241 comprises a lock cylinder and a lock tube, the lock cylinder comprises a key hole for inserting a corresponding key, and when the key is inserted into the lock cylinder through the key hole, the lock cylinder can rotate relative to the lock tube, so that unlocking is completed. In this embodiment, the clutch assembly 126 is further disposed coaxially with the lock cylinder 124, and the clutch assembly 126 is substantially disc-shaped and includes a strip-shaped center hole and a second driving portion 264 disposed at an outer peripheral portion. The lock bar 1242 passes through the clutch assembly 126 and is form-fitted with the first driving part 262 of the clutch assembly 126 formed as a bar-shaped center hole, thereby enabling the clutch assembly 126 to be driven to rotate. The clutch assembly 126 further includes a second drive portion 264 disposed circumferentially outward, the second drive portion 264 partially protruding radially from the outer periphery of the clutch assembly 126 and forming a drive edge. The lock further comprises an active drive assembly 122, said active drive assembly 122 comprising an active drive dial 1222 for driving said second drive portion 264, and a lever 1224 for receiving an external drive. Specifically, the main body of the active driving assembly 122 is a plate, which is hinged to an intermediate fixing plate 112, and the intermediate fixing plate 112 is fixedly connected to the housing 110, wherein the main body protrudes to one side along the radial direction of the pivot axis to form a shift lever 1224, and the shift lever 1224 protrudes out of the housing 110 and can be accessed and driven by the outside of the lock. The main body of the active driving assembly 122 further includes an active driving dial 1222, and the active driving dial 1222 protrudes to the other side along the radial direction of the pivot shaft, so as to push the second driving portion 264 of the clutch assembly 126 when the active driving dial 1222 pivots, and further drive the locking ruler 1242 to rotate to complete locking. The main body of the active driving assembly 122 is further provided with a locking groove 1226 and a spring fixing column 1228. The lock includes a return spring 137 for returning the active drive dial 1222, one end of the return spring 137 is fixed to the spring fixing column 1228, and the other end is fixed to the housing 110.

In addition, the lock of the present embodiment further includes a counter lock 144, where the counter lock 144 includes a locking seat 1442 fixed relative to the housing 12 and a locking slide 142 capable of being moved relative to the locking seat 1442 by an external operation, and the locking slide 142 is capable of engaging or disengaging with the clutch assembly 26 to lock or release the rotation of the clutch assembly 26. Specifically, the locking slide 142 includes a spring pin 1422 that is telescopically disposed toward the locking seat 1442 and an anti-lock pin 1424 that protrudes toward the active drive assembly 122. The locking seat 1442 is provided with two positioning recesses corresponding to the spring pins 1422, and the two positioning recesses correspond to the shape of the spring pins 1422, so that the locking slider 142 can be moved along the arrangement direction of the positioning recesses and respectively positioned at the positions corresponding to the two positioning recesses. Wherein in a first recessed position the counter lock pin 1424 is spaced from the locking groove 1226 on the body of the active drive assembly 122, and in a second recessed position the counter lock pin 1424 is inserted into the locking groove 1226 and locks the active drive assembly 122 against rotation.

The lock of the present embodiment further includes a lock body 130 connected to the lock bar 1242 and driven by the lock bar 1242, where the lock body 130 may be, for example, a lock body with a locking bolt, or a lock body with a tilting bolt. The lock body 130 may be connected to, for example, the inside of a side edge of an object to be locked (e.g., a door, a window, etc.), so that a lock tongue thereof can be extended or retracted from the lock body, thereby allowing the lock body to be connected to or unlocked from a fixture (e.g., a door frame, a window frame, etc.) by locking the lock tongue. In this embodiment, the locking ruler extends from the other side of the lock body after passing through the lock body 130, and is connected to a second driving member 1202 in shape, where the second driving member 1202 may be, for example, a lever that can be accessed and operated by the other side of the object to be locked, so that locking or unlocking of the door can be directly controlled on the other side of the object to be locked.

Fig. 8 and 9 show an exploded schematic view of a lock according to a third embodiment of the utility model. Unlike the second embodiment, the lock according to the third embodiment of the present utility model includes a semicircular lock tongue 532, and the lock tongue 532 can be rotated out of the outlet 5102 along an arc track from the inside of the lock by the driving of the knob, and after forming a partial annular area for locking on the outside of the lock, the lock tongue 532 is re-extended into the lock from an inlet 5104 and locked, so that the semicircular lock tongue 532 and the lock body shell 510 can enclose a locking area together for locking with an object to be locked. A rear plate 540 encloses the internal parts of the lock together with the front plate 510, and a dial 527 is hinged to the rear plate 540 at the rear of the lock.

In particular, referring simultaneously to fig. 10a to 11d, a lock according to a third embodiment of the utility model comprises a knob 522, a lock cylinder 524, a face housing 510 and an unlocking drive 528 similar to the lock according to the first embodiment of the utility model. Wherein the knob 522 is generally annular, and a generally disc-shaped lock cylinder 524 is disposed substantially coaxially with the knob 522 in a central position of the annular structure of the knob 522. The knob 522 includes a knob stem 5222 protruding in an axial direction thereof. The knob 522 and the lock cylinder 524 are rotatable relative to each other. Wherein the lock cylinder 522 comprises a lock cylinder housing 5243, the lock cylinder housing 5243 comprising mounting holes 5244 provided towards the face housing 510 for fixedly connecting to the face housing 510, which mounting holes 5244 may be, for example, threaded holes for screwing in screws. The lock core 522 includes a lock cylinder 5247, a lock hole 5245 facing the outside of the lock is provided on the lock cylinder 5247 for inserting a corresponding key, and one end of the lock cylinder 5247 facing the inside of the lock further includes a driving connector 5242. The cylinder housing 5243 is relatively locked to the cylinder liner 5247 when the corresponding key is not inserted into the cylinder, and the cylinder liner 5247 can be rotated relative to the cylinder housing 5243 when the corresponding key is inserted into the lock hole 5245. The side of the knob 522 facing the face housing 510 is formed with a radially inwardly extending snap ring 5224. And after the two are assembled and fixedly mounted to the face-piece 510 by means of the mounting hole 5244, the knob stem 5222 of the knob 522 is inserted into an arc-shaped groove 5106 provided in the face-piece 510 and penetrating in the axial direction, the driving connector 5242 of the lock cylinder 524 is inserted into a through hole 5108 formed in the axial direction in the center of the face-piece 510, and the retainer ring 5224 is interposed between the face-piece 510 and the lock cylinder 524. Preferably, a spring fixing portion 5105 for fixing a return spring is further provided at an inner side of the face case 510, and a spring (not shown) for providing a return spring force to the knob 522 may be a tension spring having one end fixed to the spring fixing portion 5105 and the other end fixed to a knob stem 5222 of the knob so that the knob is maintained at its initial position when not acted upon by an external force.

After being inserted into the through hole 5108, the driving connector 5242 is sleeved with the clutch assembly 526 and the unlocking driving member 528 at the other side of the face shell. Wherein the unlocking drive 528 is disposed between the clutch assembly 526 and the face housing 510.

The clutch assembly 526 includes a central aperture 5260 for passage of the unlocking assembly, drive teeth 5266 for driving a dial 527, a second drive portion for receiving drive from the unlocking drive 528, the second drive portion including an a portion 5264A and a B portion 5264B, and a first drive portion 5262 for receiving drive from the knob. The clutch assembly 526 includes a circular plate-shaped body with a through hole disposed therethrough at a central portion of the plate-shaped body. The first driving portion 5262 is a sector plate-shaped body provided on a circumferential outer side of the plate-shaped body, the driving teeth 5266 are provided on a side of the first driving portion 5262 which is radially opposite to the first driving portion 5262, and the driving teeth 5266 are a plurality of gears formed radially outwardly, which are circumferentially arranged on the radial outer side of the plate-shaped body, and the number of teeth in the present embodiment is 4. The clutch assembly 526 is further provided with a second driving portion, which includes two protruding portions extending from the radially outer side of the plate-shaped body in the axial direction toward the unlocking driving member 528, and is defined as an a portion 5264A and a B portion 5264B, respectively, and the a portion 5264A and the B portion 5264B are disposed on opposite sides of the driving tooth 5266 in the circumferential direction of the plate-shaped body. The first driving portion 5262 can be driven by the knob in a first direction to move in a locking direction, the a portion 5264A of the second driving portion can be driven by the unlocking driving member 528 to move in an unlocking direction, and the B portion 5264B of the second driving portion can be driven by the unlocking driving member 528 in a direction opposite to the unlocking direction to move in an unlocking direction.

The unlocking driving member 528 is locked on the driving connector 5242 of the lock cylinder 524 extending into the central hole of the clutch assembly 526 in an anti-rotation manner. The unlocking driving member 528 has a substantially circular shape, and the circumferential side portion thereof partially protrudes radially outward to form a sector-shaped unlocking dial 5282, and the unlocking dial 5282 is configured to drive the a portion 5264A or the B portion 5264B of the second driving portion to move in the unlocking direction or the counter-locking direction when the lock cylinder 524 is unlocked. In this embodiment, the radial inner side of the unlocking driving member 528 further includes a fixing protrusion 5286 protruding inward in the radial direction, the fixing protrusion 5286 is a pair of opposite square-shaped sheet-shaped protrusions, and the fixing protrusion 5286 is configured to be snapped into a corresponding radial groove 5246 on the driving connector 5242, so as to implement an anti-rotation connection.

The pulling bar 527 includes a rectangular plate-shaped body, and an end positioning portion 5272 penetrating the plate-shaped body in the thickness direction is provided at the center of one end of the rectangular plate-shaped body along the long side, and the positioning portion 5272 is used for driving the lock tongue 532. The other end of the rectangular plate-like body along the long side is provided with a drive gear 5274, and the central axis of the drive gear 5274 is disposed toward the housing 510 so that the gear can be engaged with the drive teeth 5266 of the clutch assembly 526. The lock tongue 532 is generally ring-shaped with a notch, a positioning groove 5322 is disposed on a side of the lock tongue 532 facing the back plate 540, and the positioning portion 5272 is adapted to be snapped into the positioning groove 5322. The pulling ruler 527 is hinged to the back plate 540, and the axis of the rotation center of the pulling ruler 527 is coincident with the axis of the driving gear 5274, so that the rotation of the pulling ruler 527 can drive the lock tongue 532 to rotate through the cooperation of the positioning part 5272 and the positioning groove 5322 of the lock tongue 532. The lock further includes a return torsion spring 535, one side of the return torsion spring 535 is rotatably connected to a fixed pin 5122 fixed to the middle partition 512 of the face housing 510, and the other side is rotatably connected to a setting gauge return pin 5276 on the setting gauge 527, so that the setting gauge 527 can be held between an unlocked position and a locked position by the spring force of the return torsion spring 535. In this embodiment, the dial 527 is turned by approximately 90 degrees from the unlock position (as shown in fig. 10a and 11 a) to the lock position (as shown in fig. 10b and 11 b).

Thus, referring to fig. 10a to 11b, when the knob 522 is rotated to lock, the first driving portion 5262 of the clutch assembly 526 is driven to rotate by the knob, and the driving teeth 5266 further drive the dial 527 to rotate, so that the lock tongue 532 is rotated and extended. After the setting bar 527 is moved to the locked position, the spring force of the return torsion spring 535 holds the setting bar 527 therein, and the knob 522 may be returned to the original position by an external torsion force or an internal return spring force (provided, for example, by a spring connected between the face housing 510 and the knob 522), at which time the knob lever 5222 of the knob 522 is out of contact with the first driving portion 5262 of the clutch assembly 526, and the clutch assembly 526 is held in place by engagement of its driving teeth 5266 with the driving gear 5274 of the setting bar 527.

Referring to fig. 11b and 11D, when the lock is unlocked, a key is inserted, the lock cylinder 524 is rotated in the first direction D1, and the rotation of the lock cylinder 524 is transmitted to the a portion 5264A of the second driving portion through the first transmission side 5282A of the unlocking driver 528, and the driving teeth 5266 and thus the driving gear 5274 are driven to rotate. That is, lock cylinder 524 drives tongue clutch assembly 526 to rotate, which in turn drives dials 527, tongue 532 to rotate and move from a locked position (as shown in fig. 11 b) to an unlocked position (as shown in fig. 11 d).

Referring to fig. 11a and 11c, the lock further includes a mode of use for back locking by a key. When the lock is in the unlocked state (as shown in fig. 11 a), the key is inserted into the lock cylinder 524, and then the lock cylinder 524 is rotated in the second direction D2, and the rotation of the lock cylinder 524 is transmitted to the B portion 5264B of the second driving portion through the second transmission side 5282B of the unlocking driving member 528, so as to drive the driving teeth 5266 and further drive the driving gear 5274 to rotate. That is, lock cylinder 524 drives tongue clutch assembly 526 to rotate, which in turn drives dials 527, tongue 532 to rotate and move from an unlocked position (as shown in fig. 11 a) to a locked position (as shown in fig. 11 c). This arrangement is achieved by adaptively setting the angle between the positions of the a and B parts of the second drive part, i.e. the positions of the a and B parts of the second drive part are such that they can be rotated by the unlocking drive driven by the first direction D1 or the second direction D2 and such that the bolt can be switched between the unlocked, i.e. locked, state.

It can be understood that in the above embodiments, the lock is unlocked by means of the key corresponding to the lock, and in other embodiments, other verification mechanisms, such as a magnetic card, a fingerprint, a password unlocking mechanism, etc., may be used, and the unlocking mechanism only needs to be capable of completing the verification function and ensuring the use safety of the lock. The verification mechanism can directly replace a key receiving part of the lock cylinder, can be independently arranged and is electrically connected with an electric driving unlocking mechanism. After passing the verification, the unlocking mechanism is driven by the electric driving unlocking mechanism to unlock.

Fig. 12 shows an embodiment of a locking device according to the utility model, wherein a lock according to a first embodiment of the utility model is fastened to an object 101 to be locked, for enabling a locking tongue 322 of the lock to be brought into a counter-locking connection with another fastening means 102.

Fig. 13 shows a further embodiment of a locking device according to the utility model, wherein a lock 200 according to a second embodiment of the utility model is mounted on an object 301 to be locked, said lock 200 being capable of fixing said object 301 to be locked with respect to a fixture 302.

Compared with the structure that the traditional lockset uses a key to carry out the locking tongue back locking, the efficiency and the safety performance of the keyless back locking lockset in use can be greatly improved. In addition, the anti-theft door is compact and simple in structure, high in cost and maintainability, and more suitable for being used in general scenes, such as household anti-theft doors, glass sliding doors, file safe doors and the like.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (11)

1. A keyless back lock for being fixedly connected to an object to be locked and back-locking or releasing the object to be locked with respect to a fixture, the keyless back lock comprising:

a main driving assembly capable of being driven to rotate within a limited range by a rotational force,

a clutch positioning assembly comprising two ends, one of which is hinged relative to the object to be locked, the other of which can be held in a first positioning position or a second positioning position by a spring force,

the clutch component is hinged with the other end part of the clutch positioning component, can unidirectionally receive the rotation of the main driving component to move, is separated from the main driving component under the driving of the clutch positioning component after the main driving component moves to the limit position of the limiting range,

the locking assembly comprises a lock tongue which can move relative to the object to be locked, the lock tongue can be driven by the clutch assembly to move to a locking position from a release state capable of freely moving relative to a fixed object, and the lock tongue can form a locking tongue back locking state with the fixed object when moving to the locking position, so that the object to be locked is locked relative to the fixed object.

2. The keyless back lock of claim 1, wherein the primary drive assembly is operable to drive the locking assembly to effect a dead bolt back lock by the clutch assembly when rotated in a first direction and is disengaged from the clutch assembly when rotated in a second direction opposite the first direction.

3. The keyless back lock of claim 2, wherein the clutch assembly comprises a clutch lever, the clutch lever actuating the locking assembly to change to the tongue-back state when the clutch assembly is moved by movement of the main drive assembly in a first direction.

4. The keyless back lock of claim 2, further comprising an unlocking assembly accessible from the outside, wherein upon verification with a verification mechanism and passing verification, the clutch assembly is driven to move, thereby driving the locking assembly from the back-locked state to the released state.

5. The keyless back lock of claim 4, wherein the clutch assembly has a first drive portion capable of being driven by movement of the main drive assembly in a first direction to move in a locking direction, and a second drive portion capable of being driven by the unlocking assembly to move in an unlocking direction.

6. The keyless back lock of claim 5, wherein the main drive assembly comprises a knob, the unlocking assembly comprises a lock cylinder and an unlocking drive coupled to the lock cylinder, the unlocking assembly is capable of driving the locking assembly to rotate in a second direction to a released state after verification of the unlocking mechanism; and the unlocking component can drive the locking component to rotate to a back locking state along the first direction after the unlocking mechanism is verified.

7. The keyless back lock of claim 6, wherein the clutch assembly includes a central aperture for passage of the unlocking assembly, a clutch assembly receiving cavity for receiving the unlocking drive, and a clutch drive for receiving drive of the main drive assembly and the unlocking assembly.

8. The keyless back lock of claim 7, wherein the clutch assembly comprises a plate-shaped body, the central hole is provided at a central portion of the plate-shaped body, the clutch driving portion is fan-shaped plate-shaped and is provided at a circumferential outer side of the plate-shaped body, the clutch driving portion and the plate-shaped body are provided with a recess in an axial direction, and the recess defines the clutch assembly accommodating chamber.

9. The keyless back lock of claim 1, further comprising a housing fixedly connected with respect to the object to be locked, wherein the clutch positioning assembly comprises a first torsion spring fixing portion provided on the clutch assembly, a second torsion spring fixing portion provided on the housing, and a torsion spring provided between the first torsion spring fixing portion and the second torsion spring fixing portion, wherein relative positions of the first torsion spring fixing portion and the second torsion spring fixing portion are configured such that when the clutch assembly rotates, the torsion spring can push the clutch positioning assembly to maintain the position when the clutch assembly moves to the first positioning position or the second positioning position with respect to the housing.

10. The keyless back lock of claim 8, wherein the primary drive assembly comprises a primary drive clutch positioning assembly.

11. A locking device comprising the keyless back lock according to any one of claims 1 to 10.

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