CN116427788A - Door lock locking mechanism and door lock thereof - Google Patents

Abstract

The invention discloses a door lock locking mechanism and a door lock thereof, wherein the door lock locking mechanism comprises: a latch mechanism; the interlocking component is arranged between the lock shell and the latch mechanism, and is used for locking the latch mechanism at a locking position to limit the movement of the latch mechanism in a locking direction by locking the latch mechanism and unlocking the latch mechanism by unlocking the latch mechanism; the driving and retaining assembly is arranged between the interlocking assembly and the shifting wheel of the lock cylinder, is triggered by unlocking operation or locking operation, drives the interlocking assembly to switch between a locking state and an unlocking state, and keeps the interlocking assembly in the unlocking state or the locking state in a limiting manner; the transmission mechanism is arranged between the handle shaft of the handle and the inclined tongue mechanism and can drive the inclined tongue mechanism to move towards the locking position. The door lock locking mechanism has the advantages of simple structure, less parts, low manufacturing and installation cost, simple transmission and smoother operation.

Description

Door lock locking mechanism and door lock thereof

Technical Field

The invention relates to the technical field of mechanical locks, in particular to a door lock locking mechanism and a door lock thereof.

Background

Depending on the way the lock is unlocked, the door locks are generally classified into electronic locks and mechanical locks, wherein the mechanical locks are normally unlocked or locked by means of a key cooperating with a lock. Conventional mechanical door locks are typically fitted with a deadbolt mechanism and a deadbolt: the inclined tongue mechanism is controlled by the handle, and the door leaf is positioned and simply locked on the door frame under the action of the inclined tongue mechanism, so that the locking effect is not realized; the safety lock tongue is usually designed as a square tongue and is in linkage fit with the lock cylinder to realize a safety function, and the safety lock tongue can be opened or closed by a key so as to retract or extend into the lock body. When the door lock is used, the safety lock tongue is required to be in an open state of retracting into the lock body, and the handle is used for driving the lock tongue mechanism to retract into the lock body, so that the door leaf is unlocked.

The mechanical door lock which needs to be additionally provided with the safety lock tongue such as the square tongue to realize the function of locking the door leaf has the problems of complex transmission relation among parts, complex structure of single part, high manufacturing cost and the like.

In the prior art, a door lock back locking mechanism is also provided, and the locking mechanism is used for limiting the locking-in action of the lock tongue plate in the locking-out state so as to prevent the illegal unlocking defect caused by utilizing the inclined tongue mechanism. In general, the back locking mechanism can directly release the restriction of the back locking mechanism to the lock tongue plate through the torsion handle on the inner side of the door leaf, and when unlocking is needed outside the door leaf, a clutch device used for controlling the integral rotation or the split rotation of the indoor handle and the outdoor handle is needed to be arranged between the outdoor handle and the indoor handle.

The anti-lock mechanism in the prior art can omit the safety lock tongue, and also overcomes the defect that the inclined tongue mechanism is easy to open illegally. However, the prior art still needs to provide a clutch device between the outdoor handle and the indoor handle for controlling the indoor handle and the outdoor handle to rotate integrally or separately. This is also relatively complex for a relatively simple door lock with only a latch mechanism.

Disclosure of Invention

Therefore, the invention aims to overcome the defects of complex transmission relation and complex structure in the prior art.

To this end, an embodiment of the present invention provides a door lock locking mechanism including:

a latch mechanism movably mounted within the lock housing between a locked position and receiving a biasing force tending to the locked position of a lock-out reset member between the lock housing and the latch mechanism;

the interlocking component is arranged between the lock shell and the inclined tongue mechanism, and is used for locking the inclined tongue mechanism at a locking position to limit the inclined tongue mechanism to move towards a locking direction by locking the lock shell and the inclined tongue mechanism, and is used for unlocking the inclined tongue mechanism by unlocking the lock shell and the inclined tongue mechanism;

the driving and retaining assembly is arranged between the interlocking assembly and a thumb wheel of the lock cylinder, is triggered by unlocking operation or locking operation, drives the interlocking assembly to switch between the locking state and the unlocking state, and keeps the interlocking assembly in the unlocking state or the locking state in a limiting manner;

the transmission mechanism is arranged between the handle shaft of the handle and the inclined tongue mechanism and can drive the inclined tongue mechanism to move towards the locking position.

Optionally, the interlock assembly includes:

the first limiting piece is fixedly arranged on the lock shell;

the linkage piece is installed on the inclined tongue mechanism in a limited mode in a locking-out and locking-in direction, and can move between a locking position capable of being matched with the first limiting piece to achieve a locking state and an unlocking position separated from the first limiting piece to achieve an unlocking state relative to the inclined tongue mechanism.

Optionally, a limiting structure for limiting and matching with the first limiting part is arranged on the linkage part; the limiting structure is combined with the first limiting piece to achieve a locking state; the limiting structure is separated from the first limiting piece to achieve an unlocking state;

the limiting structure is limited to be combined with or separated from the first limiting piece in a direction forming an included angle with the locking-out and locking-in direction.

Optionally, the limiting structure is a stop groove formed on the linkage member;

the first limiting piece is a limiting pin which can be inserted into or removed from the stop groove in the rotation process of the linkage piece.

Optionally, a first chute is formed on the linkage member, and the first chute is slidably matched with the first limiting member in the locking-in-locking-out direction when the linkage member is positioned at the unlocking position;

the first sliding groove is communicated with the stop groove, and the first limiting piece can be made to enter and exit in a switchable manner between the stop groove and the first sliding groove in the process of rotating the linkage piece between the locking position and the unlocking position;

the latch mechanism is provided with a latch frame which is used for installing the latch assembly and is slidably arranged in the lock shell, a second chute which can be slidably matched with the first limiting piece in the locking-in and locking-out direction is formed on the latch frame, and the latch frame is slidably limited on the lock shell through the matching of the second chute and the first limiting piece.

Optionally, the linkage is pivotally connected to the tongue frame about a first axis of rotation.

Optionally, one of the linkage piece and the inclined tongue frame is provided with an arc-shaped first limit groove taking the first rotation axis as a circle center, and the other one of the linkage piece and the inclined tongue frame is provided with a second limit piece which is suitable for being in limit fit with the side walls of the two ends of the first limit groove;

the linkage piece is suitable for being limited in a preset rotation range through the resisting limit of the first limit groove and the second limit piece.

Optionally, the drive holding assembly includes:

the transmission piece is provided with a first end acted by the dial wheel of the lock cylinder and a second end acted on the linkage piece; the lock cylinder is movably arranged in the lock shell under the action of the shifting wheel of the lock cylinder, and the linkage piece is driven to switch between a locking state and an unlocking state through the movement of the transmission piece.

Optionally, the transmission member is pivotally connected to the lock housing about a second axis of rotation.

Optionally, a limiting component and an elastic retainer are arranged between the transmission component and the lock shell;

the limiting assembly is used for limiting the rotation of the transmission piece between a first limit position and a second limit position; the transmission piece is movably arranged in the lock shell between a first limit position and a second limit position, the transmission piece drives the linkage piece to be in a locking state in the first limit position, and the transmission piece drives the linkage piece to be in an unlocking state in the second limit position;

the elastic retainer is used for retaining the transmission piece at a first limit position or a second limit position.

Optionally, the limiting component comprises a third limiting piece fixedly arranged on the lock shell and a second limiting groove correspondingly arranged on the transmission piece; the second limiting groove is an arc groove which takes the second rotation axis as a circle center and is in limiting fit with the third limiting piece;

the elastic retaining member is an elastic retaining spring arranged between the third limiting member and the transmission member, and the torque of the elastic retaining spring on the second rotation axis of the biasing force exerted by the third limiting member and the transmission member is suitable for retaining the transmission member at the first limit position and the second limit position when the transmission member rotates to the first limit position and the second limit position.

Optionally, the limiting component comprises a third limiting piece fixedly arranged on the lock shell and a second limiting groove correspondingly arranged on the transmission piece; the second limiting groove is an arc groove which takes the second rotation axis as a circle center and is in limiting fit with the third limiting piece;

the elastic retainer is an elastic buckle which is arranged on the transmission piece and is suitable for being matched with the third limiting piece, and the elastic buckle is provided with two resisting parts; one of the resisting parts is used for elastically resisting the third limiting part to limit the rotation of the transmission part to the second limit position when the transmission part rotates to the first limit position; the other resisting part is used for elastically resisting on the third limiting piece to limit the rotation of the transmission piece to the first limiting position when the transmission piece rotates to the second limiting position.

Optionally, a driving pin suitable for sliding fit with the linkage member is arranged at the second end of the transmission member, a third sliding groove is correspondingly arranged on the linkage member, and the transmission member slides along the third sliding groove through the driving pin so as to drive the linkage member to rotate between a locking position and an unlocking position;

when the linkage piece is positioned at the locking position, the driving pin and the third sliding groove are in a self-locking relation, so that the linkage piece cannot rotate to the unlocking position by itself.

Optionally, the transmission mechanism includes:

the handle shifting piece is fixedly arranged on the handle shaft;

and one end of the transmission piece is meshed and matched with the handle shifting piece teeth in a transmission way, and the other end of the transmission piece is suitable for acting on the inclined tongue mechanism, is suitable for transmitting the torsion of the handle acting on the handle shaft to the inclined tongue mechanism and is converted into a thrust force which overcomes the biasing force of the inclined tongue mechanism, which tends to be locked out, and faces the locking direction.

Optionally, the latch mechanism is provided with a latch frame for installing the latch assembly and slidably installed in the lock shell, and a crank arm matched with the transmission piece is formed on the latch frame.

Optionally, the transmission mechanism further includes:

and one end of the transmission reset piece is connected with the transmission piece, the other end of the transmission reset piece is arranged on the lock shell, the transmission reset piece is used for applying a biasing force to the transmission piece, and the transmission piece drives the handle plectrum to tend to be separated from the action of the inclined tongue mechanism under the action of the biasing force.

The technical scheme of the invention has the following advantages:

1. in the embodiment of the invention, the use principle of the door lock locking mechanism is as follows:

unlocking the door opening operation: when the linkage piece is in the unlocking position, the handle is rotated in the forward direction, the handle plectrum arranged on the handle shaft is rotated, the handle plectrum is rotated to drive the transmission piece meshed with the handle plectrum to rotate, the action arm on the transmission piece moves and resists the crank arm of the inclined tongue frame, the crank arm is applied with thrust force towards the locking direction, the inclined tongue frame can slide towards the locking direction along the position relation between the limiting pin and the first sliding groove and the second sliding groove under the action of the thrust force, and at the moment, the inclined tongue mechanism is retracted into the lock shell, and the unlocking door opening action is completed.

When the door opening operation of the handle is released, the transmission reset piece applies a biasing force to the transmission piece under the action of self elastic force, the handle plectrum rotationally reset to the transmission piece under the action of the biasing force tends to be separated from the action of the crank arm on the inclined tongue frame, and the transmission piece drives the handle plectrum meshed with the transmission piece to rotationally reset when rotationally reset, so that the handle reversely rotates and resets; simultaneously, when the latch mechanism is retracted into the shell, the locking reset piece is compressed and deformed, and a biasing force tending to the locking direction is applied to the latch frame under the action of self elastic force, and the handle pulling piece does not apply acting force to the upper crank arm of the latch frame any more, so that the latch frame can move to the locking position in the locking direction under the action of the elastic force of the locking reset piece.

Locking operation: when the latch mechanism is located at the locking position, a key is inserted into the lock cylinder, and the shifting wheel of the lock cylinder acts on the first end of the transmission member by screwing the key so as to drive the transmission member to rotate to a first limit position around the second rotation axis, the second end of the transmission member drives the linkage member to rotate to a locking position around the first rotation axis in a first direction, the limiting pin is embedded into the stop groove, the stop groove extends along a direction forming an included angle with the locking-in and locking-out direction at the moment, and the limiting pin is combined with the stop groove so as to lock the lock shell and the latch frame, so that the latch mechanism is locked at the locking-out position to limit the movement of the latch mechanism to the locking-in direction. At this time, the lock tongue mechanism cannot be driven to retract into the lock shell by rotating the handle.

Unlocking operation: when the latch mechanism is located at the locking position, a key is inserted into the lock cylinder and is screwed in the direction opposite to the locking operation, so that a shifting wheel of the lock cylinder acts on the first end of the transmission member to drive the transmission member to rotate to a second limit position around the second rotation axis, and the linkage member rotates to an unlocking position around the first rotation axis in a second direction opposite to the first direction, so that the limiting pin moves out of the stop groove and is disengaged from the stop groove to release the locking between the lock shell and the latch frame, and the linkage member reaches the unlocking state.

2. The interlocking component has simple structure and low manufacturing and installation cost, and the limiting pin and the stop groove can be combined by rotating the interlocking piece so as to lock the lock shell and the inclined tongue frame, so that the locking is firm.

3. In the embodiment of the invention, the driving and retaining assembly comprises a transmission part, a limiting assembly and an elastic retaining assembly which are connected with each other, and the driving and retaining assembly drives the interlocking assembly to switch between a locking state and an unlocking state after being triggered by unlocking operation or locking operation through the linkage relation among the components and keeps the interlocking assembly in the unlocking state or the locking state in a limiting manner. The driving and retaining assembly has the advantages of simple structure, less parts, low manufacturing and installation cost, simple transmission and smoother locking or unlocking operation.

4. In the embodiment of the invention, when the linkage piece is positioned at the locking position, the driving pin and the third sliding groove are in a self-locking relation, so that the linkage piece cannot rotate to the unlocking position by itself, and the stability of the linkage piece kept at the locking position is improved. The third chute and the first chute on the linkage piece are arranged in parallel, when the linkage piece is in an unlocking position, the length directions of the third chute and the first chute are parallel to the locking-in and locking-out direction, the linkage piece and the inclined tongue mechanism can be driven to move in the locking-in and locking-out direction together through handle opening operation, at the moment, the third chute can move relative to the driving pin, and the driving pin cannot block the movement of the linkage piece and the inclined tongue mechanism in the locking-in and locking-out direction.

5. In the embodiment of the invention, the handle shifting piece and the transmission piece are in tooth meshing transmission, the transmission is stable and reliable, the handle opening operation is smoother, and the impact and noise can be reduced.

In a second aspect, to achieve the above object, an embodiment of the present invention further provides a door lock, including the door lock locking mechanism according to any one of the foregoing embodiments.

The beneficial effects are that:

the door lock provided by the invention comprises the door lock locking mechanism, wherein the technical advantages and effects achieved by the door lock comprise the technical advantages and effects achieved by the door lock locking mechanism, and the technical advantages and effects are not repeated here.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is an isometric view of a door lock locking mechanism of the present invention with an interlock assembly in an unlocked state and without a handle door opening operation;

FIG. 2 is a front view of the door lock mechanism of the present invention with the interlock assembly in an unlocked condition and without a handle door opening operation;

FIG. 3 is an isometric view of a door lock locking mechanism of the present invention when a handle is rotated to perform a door opening operation with an interlock assembly in an unlocked state;

FIG. 4 is a front view of the door lock mechanism of the present invention with the interlock assembly in an unlocked state and the handle rotated to perform a door opening operation;

FIG. 5 is an isometric view of the door lock locking mechanism of the present invention with the interlock assembly in a locked condition;

FIG. 6 is a front view of the door lock locking mechanism of the present invention with the interlock assembly in a locked condition;

fig. 7 is a front view of a door lock locking mechanism according to a second embodiment of the present invention.

Reference numerals illustrate:

1. a lock case; 11. a lock core; 12. a handle;

2. a latch mechanism; 21. a latch assembly; 22. a sloping tongue frame; 221. a second chute; 222. a crank arm;

3. an interlock assembly; 31. a limiting pin; 32. a linkage member;

321. a pin joint rivet; 322. a stop groove; 323. a first chute; 324. a first limit groove; 325. a second limiting piece; 326. a third chute;

4. a drive holding assembly;

41. a transmission member; 411. a screw tube is pivoted; 412. a drive pin;

42. a limit component; 421. a limit screw tube; 422. an arc-shaped groove;

431. an elastic holding spring; 432. an elastic buckle;

5. a transmission mechanism; 51. a handle pulling piece; 52. a transmission plate; 521. a third axis of rotation; 53. a transmission reset piece;

6. and locking out the reset piece.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

As shown in the embodiment of fig. 1 to 6, it should be noted that the direction indicated by the arrow in fig. 1 is the locking-in-locking-out direction of the latch frame 22 in the lock case 1; the direction indicated by the arrow in fig. 3 is the locking direction.

The embodiment of the invention provides a door lock locking mechanism which comprises a latch mechanism 2, an interlocking assembly 3, a drive retaining assembly 4 and a transmission mechanism 5. The latch mechanism 2 includes a latch assembly 21, and a latch bracket 22 for mounting the latch assembly 21 and slidably mounted in the lock housing 1 between a locked-in position and a locked-out position, and the lock housing 1 is provided with a lock-out reset member 6 for applying a biasing force tending to the locked-out position to the latch mechanism 2. Optionally, the locking reset member 6 is a torsion spring, the middle part of the torsion spring is sleeved on a screw tube fixed on the lock shell 1, one end of the torsion spring is stopped on an end face of the lock shell 1 far away from the latch bolt assembly 21, the other end of the torsion spring is stopped on the latch bolt frame 22, when the latch bolt mechanism 2 moves inwards to retract into the lock shell 1 towards the locking direction, the torsion spring is deformed under the action of the torque of the latch bolt frame 22, and the torsion spring exerts a biasing force tending to the locking position on the latch bolt frame 22 under the action of self elasticity.

The interlocking component 3 is disposed between the lock case 1 and the latch mechanism 2, and includes a linkage member 32 riveted to the latch frame 22 by a pivot rivet 321, wherein the linkage member 32 can rotate about a central axis of the pivot rivet 321, that is, about a first rotation axis. In this embodiment, the linkage member 32 is provided with an arc-shaped first limiting groove 324 with the first rotation axis as the center, and the latch frame 22 is provided with a second limiting member 325 for limiting cooperation with two end side walls of the first limiting groove 324. So configured, when the linkage member 32 rotates about the first rotation axis and reaches the limit position, the sidewalls at the two ends of the first limiting groove 324 on the linkage member 32 can be stopped against the second limiting member 325 to limit the linkage member 32 to continue rotating, thereby limiting the linkage member 32 to rotate within the preset angle range. As another embodiment, the first limiting groove 324 may be formed on the latch frame 22, and the second limiting member 325 is correspondingly mounted on the linkage member 32. Optionally, the second limiting member 325 is a rivet.

The interlocking assembly 3 further comprises a limiting pin 31 as a first limiting member fixedly arranged on the lock case 1, and a stop groove 322 as a limiting structure formed on the linkage member 32 for limiting cooperation with the limiting pin 31. The stop pin 31 can be inserted into or removed from the stop groove 322 during rotation of the linkage 32. The linkage piece 32 is further formed with a first chute 323 which can be slidably matched with the limiting pin 31 in the locking-in-locking-out direction when the linkage piece is positioned at the unlocking position; the first sliding groove 323 is in communication with the stop groove 322, and the link member 32 can enable the limiting pin 31 to be switched in and out between the stop groove 322 and the first sliding groove 323 during rotation between the locking position and the unlocking position. The first sliding groove 323 and the stop groove 322 form an L-shaped sliding groove integrally formed on the link 32. The latch frame 22 is formed with a second chute 221 which can be slidably matched with the limiting pin 31 in the locking-in and locking-out direction, and the latch frame 22 is slidably limited on the lock shell 1 through the matching of the second chute 221 and the limiting pin 31. The interlocking component 3 has simple structure and low manufacturing and installation cost, and the limiting pin 31 and the stop groove 322 can be combined by rotating the linkage piece 32 to lock the lock shell 1 and the inclined tongue frame 22, so that the locking is firm.

Referring to fig. 1 to 4, when the linkage 32 is in the unlocked position, the projection of the first sliding groove 323 on the lock case 1 is opposite to the projection of the second sliding groove 221 on the latch frame 22 on the lock case 1, and both extend along the locking and unlocking direction, and the latch frame 22 can slide along the position relationship between the limiting pin 31 and the first sliding groove 323 and the second sliding groove 221 in the locking and unlocking direction when the handle 12 is operated to open the door, so that the linkage 32 is in the unlocked state.

Referring to fig. 1, 2, 5 and 6, when the latch frame 22 and the link member 32 slide to the locking position in the locking-in-locking-out direction, the link member 32 is driven to rotate to the locking position in the first direction about the first rotation axis, so that the stopper pin 31 is inserted into the stopper groove 322, and the stopper groove 322 extends in a direction forming an angle with the locking-in-locking-out direction, and the stopper pin 31 is combined with the stopper groove 322 to lock the lock case 1 and the latch frame 22, thereby locking the latch mechanism 2 in the locking position to restrict the movement of the latch mechanism 2 in the locking-in direction, as shown in fig. 5 and 6. When the lock is unlocked, the linkage 32 is driven to rotate around the first rotation axis in a second direction opposite to the first direction to the unlock position, so that the limiting pin 31 moves out of the stop groove 322 and is disengaged from the stop groove 322 to release the lock between the lock case 1 and the latch frame 22, so that the linkage 32 reaches the unlocking state, as shown in fig. 1 and 2, and at this time, the latch mechanism 2 is not limited by the interlocking component 3 and can slide in the locking-in-locking-out direction when the handle 12 is operated to open the door.

The drive holding assembly 4 includes a transmission member 41 movably disposed on the lock housing 1, wherein the transmission member 41 is riveted to the lock housing 1 through a pivoting screw 411 in the present embodiment, and is rotatable about a central axis of the pivoting screw 411, i.e., about a second rotation axis. The transmission member 41 has a first end acted upon by the thumbwheel of the lock cylinder 11 and a second end acted upon the linkage member 32; the transmission member 41 rotates at a first end thereof about the second rotation axis between the first limit position and the second limit position under the action of the thumbwheel of the lock cylinder 11, and drives the linkage member 32 to switch between the locked state and the unlocked state through the second end of the transmission member 41: when the transmission member 41 rotates around the second rotation axis to the first limit position, the second end of the transmission member 41 drives the linkage member 32 to be in the locking state, as shown in fig. 5 and 6; when the transmission member 41 rotates about the second rotation axis to the second limit position, the second end of the transmission member 41 drives the linkage member 32 to be in the unlocked state, as shown in fig. 1 and 2.

In this embodiment, the transmission member 41 has a plate-like structure. A limiting assembly 42 and an elastic holding assembly are provided between the transmission member 41 and the lock case 1.

The limiting assembly 42 comprises a limiting screw 421 serving as a third limiting piece fixedly arranged on the lock shell 1 and an arc-shaped groove 422 serving as a second limiting groove correspondingly arranged on the transmission piece 41; the arc-shaped groove 422 takes the second rotation axis as the center of a circle and is in limit fit with the limit screw 421. Alternatively, the third limiting member may be a rivet. In this embodiment, when the transmission member 41 rotates around the second rotation axis and reaches the first limit position or the second limit position, the side walls at two ends of the arc-shaped slot 422 on the transmission member 41 can be stopped on the limit screw 421 to limit the transmission member 41 to continue rotating, so that the rotation of the transmission member 41 is limited between the first limit position and the second limit position.

In the present embodiment, the elastic retaining member is an elastic retaining spring 431 disposed between the limit screw 421 and the transmission member 41, and the torque of the elastic retaining spring 431 on the second rotation axis by the biasing force exerted by the limit screw 421 and the transmission member 41 is suitable for retaining the transmission member 41 at the first limit position and the second limit position when the transmission member is rotated to the first limit position and the second limit position. In this embodiment, the elastic retaining spring 431 is a torsion spring, and one end of the torsion spring is installed and connected to the transmission member 41, and the other end of the torsion spring is connected to the limit screw 421. During unlocking operation or locking operation, the thumb wheel of the lock cylinder 11 drives the transmission member 41 to rotate between a first limit position and a second limit position around the second rotation axis, and the torsion spring is in a deformed state subjected to torque during the rotation of the transmission member 41; when the transmission member 41 rotates to the first limit position or the second limit position, the torsion spring is deformed to return and applies a biasing force to the transmission member 41 that holds the transmission member 41 in the first limit position or the second limit position.

In this embodiment, the driving and holding assembly 4 includes a transmission member 41, a limiting assembly 42 and an elastic holding assembly that are connected to each other, and the driving and holding assembly 4 drives the interlocking assembly 3 to switch between the locked state and the unlocked state after being triggered by the unlocking operation or the locking operation, and keeps the interlocking assembly 3 in the unlocked state or the locked state by limiting. The driving and retaining assembly 4 has the advantages of simple structure, less parts, low manufacturing and installation cost, simple transmission and smoother locking or unlocking operation.

The first end of the transmission member 41 is formed with a mating groove adapted to mate with a thumb wheel of the lock cylinder 11, and during an unlocking operation or a locking operation, the thumb wheel of the lock cylinder 11 can be driven to abut against a sidewall of the mating groove on the transmission member 41 by screwing the key, thereby driving the transmission member 41 to rotate about the second rotation axis.

A driving pin 412 suitable for sliding fit with the linkage piece 32 is arranged at the second end of the transmission piece 41, a third sliding groove 326 is correspondingly arranged on the linkage piece 32, and the transmission piece 41 slides along the third sliding groove 326 through the driving pin 412 so as to drive the linkage piece 32 to rotate between the locking position and the unlocking position; when the linkage 32 is in the locking position, the driving pin 412 and the third chute 326 are in a self-locking relationship, so that the linkage 32 cannot rotate to the unlocking position by itself, and the stability of the linkage 32 in the locking position is improved. In this embodiment, the third sliding groove 326 on the linkage member 32 is parallel to the first sliding groove 323, when the linkage member 32 is in the unlocked position, the length directions of the third sliding groove 326 and the first sliding groove 323 are parallel to the locking and locking direction, and the door opening operation of the handle 12 can drive the linkage member 32 and the latch mechanism 2 to move together in the locking and locking direction, at this time, the third sliding groove 326 can move relative to the driving pin 412, and the driving pin 412 cannot block the movement of the linkage member 32 and the latch mechanism 2 in the locking and locking direction.

The transmission mechanism 5 is arranged between the handle shaft of the handle 12 and the inclined tongue mechanism 2 and is used for driving the inclined tongue mechanism 2 to move towards the locking position. The transmission mechanism 5 comprises a handle pulling piece 51 fixedly arranged on a handle shaft, the handle pulling piece 51 can rotate around the handle shaft under the drive of the handle 12, the transmission mechanism 5 further comprises a transmission piece 52 which is rotatably hinged on the lock shell 1 around a third rotation axis 521 and is positioned between the handle pulling piece 51 and the inclined tongue mechanism 2, and the transmission piece 52 is hinged on the lock shell 1 through a screw and can rotate around a central axis of the screw, namely a third rotation axis 521. One end of the transmission sheet 52 is engaged with the handle pulling sheet 51 in a transmission manner, and the other end of the transmission sheet is suitable for acting on the latch mechanism 2, so as to transmit the torsion force of the handle 12 acting on the handle shaft to the latch mechanism 2, and the transmission sheet is converted into a biasing force which overcomes the bias force of the latch mechanism 2, which is applied by the locking reset piece 6 and tends to be locked, and applies a pushing force to the latch mechanism 2 towards the locking direction.

In this embodiment, the handle pulling piece 51 and the transmission piece 52 are in tooth engagement transmission, so that the transmission is stable and reliable, the handle opening operation is smoother, and the impact and noise can be reduced.

In this embodiment, the tongue frame 22 is formed with a lever 222 that cooperates with the drive plate 52. Optionally, an action arm for acting on the crank arm 222 is formed on the driving piece 52, and the action arm of the driving piece 52 can cooperate with the locking reset piece 6 to resist two sides of the crank arm 222 along the locking and locking direction, when the handle 12 is rotated, the handle pulling piece 51 is meshed with the driving piece 52 to drive the driving piece 52 to rotate, so that the action arm on the driving piece 52 moves and resists on the crank arm 222 of the latch frame 22, and thrust force towards the locking direction is applied to the crank arm 222. The action arms and the crank arms 222 are protruding blocks which are bent and formed on the transmission piece 52 and the inclined tongue frame 22 in a one-to-one correspondence.

In this embodiment, the transmission mechanism 5 further includes a transmission reset member 53, one end of which is connected to the transmission piece 52, and the other end of which is mounted on the lock case 1, where the transmission reset member 53 is used to apply a biasing force to the transmission piece 52, and the transmission piece 52 drives the handle pulling piece 51 to tend to be separated from the action of the crank arm 222 on the latch frame 22 under the action of the biasing force. Optionally, the transmission reset member 53 is a tension spring.

In the embodiment of the invention, the use principle of the door lock locking mechanism is as follows:

unlocking the door opening operation: referring to fig. 3 and 4, when the linkage 32 is in the unlocking position, the handle 12 is rotated in the forward direction, the handle pulling piece 51 mounted on the handle shaft rotates, the handle pulling piece 51 rotates to drive the transmission piece 52 engaged with the handle pulling piece to rotate, the acting arm on the transmission piece 52 moves and resists against the turning arm 222 of the latch frame 22, and a pushing force towards the locking direction is applied to the turning arm 222, the latch frame 22 can slide towards the locking direction along the positional relationship between the limiting pin 31 and the first chute 323 and the second chute 221 under the action of the pushing force, and at the moment, the latch mechanism 2 retracts into the lock case 1, so that the unlocking door opening action is completed.

When the door opening operation of the handle 12 is released, the transmission reset piece 53 applies a biasing force to the transmission piece 52 under the action of self elastic force, the handle pulling piece 51 rotationally reset to the transmission piece 52 under the action of the biasing force tends to be separated from the action of the turning arm 222 on the inclined tongue frame 22, and the transmission piece 52 rotationally resets the handle pulling piece 51 meshed with the transmission piece 52, so that the handle 12 is rotationally reset in a reverse direction; meanwhile, when the latch mechanism 2 is retracted into the housing, the latch return member 6 is compressively deformed and exerts a biasing force tending to the latch frame 22 in the latch direction under the action of its own elastic force, and since the handle tab 51 no longer exerts a force on the lever arm 222 on the latch frame 22, the latch frame 22 can be moved to the latch position in the latch direction under the action of the elastic force of the latch return member 6, as shown in fig. 1 and 2.

Locking operation: referring to fig. 5 and 6, when the latch mechanism 2 is located at the lock-out position, a key is inserted into the lock cylinder 11 and the thumb wheel of the lock cylinder 11 acts on the first end of the transmission member 41 by screwing the key to drive the transmission member 41 to rotate about the second rotation axis to the first limit position, the second end of the transmission member 41 drives the linkage member 32 to rotate about the first rotation axis in the first direction to the lock position, so that the limit pin 31 is inserted into the limit groove 322, and the limit groove 322 extends in a direction forming an angle with the lock-in and lock-out direction, and the limit pin 31 is combined with the limit groove 322 to lock the lock case 1 and the latch frame 22, thereby locking the latch mechanism 2 at the lock-out position to limit a locked state in which the latch mechanism 2 moves in the lock-in direction. At this time, the turning knob 12 cannot drive the latch mechanism to retract into the lock case 1.

Unlocking operation: referring to fig. 5 and 2, when the latch mechanism 2 is located at the lock-out position, a key is inserted into the lock cylinder 11 and is screwed in a direction opposite to the locking operation so that the thumb wheel of the lock cylinder 11 acts on the first end of the transmission member 41 to drive the transmission member 41 to rotate about the second rotation axis to the second limit position, and the link member 32 rotates about the first rotation axis in a second direction opposite to the first direction to the unlock position, so that the limit pin 31 moves out of the stop groove 322 and is disengaged from the stop groove 322 to release the lock between the lock case 1 and the latch frame 22 to bring the link member 32 to the unlock state, at which time the latch mechanism 2 is not limited by the interlock assembly 3 and can perform the unlock door opening operation described above.

As shown in the embodiment of fig. 7, the door lock locking mechanism in this embodiment is identical to the rest of the above embodiments, except that in this embodiment, the limiting assembly 42 includes a limiting screw 421 fixedly disposed on the lock case 1, and an arc-shaped slot 422 correspondingly disposed on the transmission member 41; the arc groove 422 takes the second rotation axis as the center of a circle and is in limit fit with the limit screw 421; the elastic retaining member is an elastic buckle 432 disposed on the transmission member 41 and adapted to cooperate with the limit screw 421, and the elastic buckle 432 has two resisting parts; one of the blocking parts is used for elastically blocking on the limit screw 421 to limit the rotation of the transmission member 41 to the second limit position when the transmission member is rotated to the first limit position; the other abutment is for elastically abutting on the limit screw 421 to limit the rotation thereof toward the first limit position when the transmission member 41 is rotated to the second limit position.

The present embodiment can achieve the beneficial effects achieved by the embodiments shown in fig. 1 to 6, and the description of this embodiment is omitted.

The present invention further provides a door lock comprising a door lock locking mechanism according to any of the preceding embodiments.

The door lock provided by the invention comprises the door lock locking mechanism, wherein the technical advantages and effects achieved by the door lock comprise the technical advantages and effects achieved by the door lock locking mechanism, and the technical advantages and effects are not repeated here.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While obvious variations or modifications are contemplated as falling within the scope of the present invention.

Claims (17)

1. A door lock locking mechanism, comprising:

a latch mechanism (2) movably mounted in the lock housing (1) between a lock-in position and a lock-out position and receiving a biasing force tending to the lock-out position of a lock-out reset member (6) between the lock housing (1) and the latch mechanism (2);

an interlocking component (3) arranged between the lock shell (1) and the inclined tongue mechanism (2), wherein the inclined tongue mechanism (2) is locked at a locking position by locking the lock shell and the inclined tongue mechanism (2) so as to limit the inclined tongue mechanism (2) to move towards a locking direction, and the inclined tongue mechanism (2) is unlocked by unlocking the lock shell and the inclined tongue mechanism;

the driving and retaining assembly (4) is arranged between the interlocking assembly (3) and a thumb wheel of the lock cylinder (11), is triggered by unlocking operation or locking operation, drives the interlocking assembly (3) to switch between the locking state and the unlocking state, and keeps the interlocking assembly (3) in the unlocking state or the locking state in a limiting manner;

the transmission mechanism (5) is arranged between the handle shaft of the handle (12) and the inclined tongue mechanism (2) and can drive the inclined tongue mechanism (2) to move towards the locking position.

2. The door lock locking mechanism according to claim 1, wherein the interlock assembly (3) comprises:

the first limiting piece is fixedly arranged on the lock shell (1);

the linkage piece (32) is installed on the inclined tongue mechanism (2) in a locking-out and locking-in direction limited manner, and can move between a locking position capable of being matched with the first limiting piece to realize a locking state and an unlocking position separated from the first limiting piece to realize an unlocking state relative to the inclined tongue mechanism (2).

3. The door lock locking mechanism according to claim 2, wherein a limiting structure for limiting cooperation with the first limiting member is provided on the linkage member (32); the limiting structure is combined with the first limiting piece to achieve a locking state; the limiting structure is separated from the first limiting piece to achieve an unlocking state;

the limiting structure is limited to be combined with or separated from the first limiting piece in a direction forming an included angle with the locking-out and locking-in direction.

4. A door lock locking mechanism according to claim 3, wherein the limit structure is a stop slot (322) formed in the linkage (32);

the first limiting piece is a limiting pin (31) which can be inserted into or removed from the stop groove (322) in the rotation process of the linkage piece (32).

5. The door lock locking mechanism according to claim 4, wherein the linkage member (32) is further formed with a first slide groove (323) for sliding engagement with the first stopper in the lock-in-lock-out direction when the linkage member is in the unlock position;

the first sliding groove (323) is communicated with the stop groove (322), and the first limiting piece can be switched to enter and exit between the stop groove (322) and the first sliding groove (323) in the process that the linkage piece (32) rotates between the locking position and the unlocking position;

the latch mechanism (2) is provided with a latch frame (22) which is used for installing a latch assembly (21) and is slidably arranged in the lock shell (1), a second chute (221) which can be slidably matched with the first limiting piece in the locking-in and locking-out direction is formed on the latch frame (22), and the latch frame (22) is slidably limited on the lock shell (1) through the matching of the second chute (221) and the first limiting piece.

6. The door lock locking mechanism of claim 5, wherein the linkage (32) is pivotally connected to the tongue frame (22) about a first axis of rotation.

7. The door lock locking mechanism according to claim 6, wherein one of the linkage member (32) and the latch frame (22) is provided with an arc-shaped first limit groove (324) taking the first rotation axis as a center, and the other one of the linkage member (32) and the latch frame (22) is provided with a second limit member (325) which is suitable for being in limit fit with two end side walls of the first limit groove (324);

the linkage piece (32) is suitable for limiting the linkage piece (32) within a preset rotation range through the resisting limit of the first limiting groove (324) and the second limiting piece (325).

8. The door lock locking mechanism according to any one of claims 2 to 7, wherein the drive holding assembly (4) comprises:

a transmission member (41) having a first end acted upon by said thumbwheel of said lock cylinder (11) and a second end acted upon said linkage member (32); the lock cylinder (11) is movably arranged in the lock shell (1) under the action of the shifting wheel, and the linkage piece (32) is driven to switch between a locking state and an unlocking state through the movement of the transmission piece (41).

9. Door lock locking mechanism according to claim 8, characterized in that the transmission member (41) is pivoted to the lock housing (1) about a second axis of rotation.

10. The door lock locking mechanism according to claim 9, wherein a limit assembly (42) and an elastic retainer are provided between the transmission member (41) and the lock case (1);

the limiting assembly (42) is used for limiting the rotation of the transmission piece (41) between a first limit position and a second limit position; the transmission piece (41) is movably arranged in the lock shell (1) between a first limit position and a second limit position, the transmission piece (41) drives the linkage piece (32) to be in a locking state in the first limit position, and the transmission piece (41) drives the linkage piece (32) to be in an unlocking state in the second limit position;

the elastic retainer is used for retaining the transmission piece (41) at a first limit position or a second limit position.

11. The door lock locking mechanism according to claim 10, wherein the limiting assembly (42) comprises a third limiting member fixedly arranged on the lock case (1), and a second limiting groove correspondingly arranged on the transmission member (41); the second limiting groove is an arc groove (422) which takes the second rotation axis as a circle center and is in limiting fit with the third limiting piece;

the elastic retaining member is an elastic retaining spring (431) arranged between the third limiting member and the transmission member (41), and the torque of the elastic retaining spring (431) on the second rotation axis of the biasing force exerted by the third limiting member and the transmission member (41) is suitable for retaining the transmission member (41) at the first limit position and the second limit position when the transmission member rotates to the first limit position and the second limit position.

12. The door lock locking mechanism according to claim 10, wherein the limiting assembly (42) comprises a third limiting member fixedly arranged on the lock case (1), and a second limiting groove correspondingly arranged on the transmission member (41); the second limiting groove is an arc groove (422) which takes the second rotation axis as a circle center and is in limiting fit with the third limiting piece;

the elastic retainer is an elastic buckle (432) arranged on the transmission piece (41) and suitable for being matched with the third limiting piece, and the elastic buckle (432) is provided with two resisting parts; one of the resisting parts is used for elastically resisting on the third limiting part to limit the rotation of the transmission part (41) to the second limit position when the transmission part rotates to the first limit position; the other resisting part is used for elastically resisting on the third limiting part to limit the rotation of the transmission part (41) to the first limiting position when the transmission part rotates to the second limiting position.

13. The door lock locking mechanism according to any one of claims 9 to 12, wherein a driving pin (412) adapted to be slidably matched with the linkage member (32) is arranged on the second end of the transmission member (41), a third sliding groove (326) is correspondingly arranged on the linkage member (32), and the transmission member (41) slides along the third sliding groove (326) through the driving pin (412) to drive the linkage member (32) to rotate between the locking position and the unlocking position;

when the linkage piece (32) is positioned at the locking position, the driving pin (412) and the third sliding groove (326) are in a self-locking relation, so that the linkage piece (32) cannot rotate to the unlocking position by itself.

14. The door lock locking mechanism according to any one of claims 1 to 7, wherein the transmission mechanism (5) comprises:

a handle plectrum (51) fixedly arranged on the handle shaft;

and the transmission sheet (52) is hinged on the lock shell (1), one end of the transmission sheet is meshed with the handle pulling sheet (51) in transmission fit, the other end of the transmission sheet is suitable for acting on the inclined tongue mechanism (2), is suitable for transmitting the torsion of the handle (12) acting on the handle shaft to the inclined tongue mechanism (2), and is converted into a pushing force which overcomes the biasing force of the inclined tongue mechanism (2) and tends to be in a locking position and faces the locking direction.

15. The door lock locking mechanism according to claim 14, wherein the latch mechanism (2) has a latch bracket (22) for mounting a latch assembly (21) and slidably mounted in the lock housing (1), the latch bracket (22) being formed with a lever (222) for cooperating with the transmission piece (52).

16. The door lock locking mechanism according to claim 14, wherein the transmission mechanism (5) further comprises:

the transmission reset piece (53) is connected with the transmission piece (52) at one end and is arranged on the lock shell (1) at the other end, the transmission reset piece (53) is used for applying a biasing force to the transmission piece (52), and the transmission piece (52) drives the handle shifting piece (51) to tend to be separated from the action of the inclined tongue mechanism (2) under the action of the biasing force.

17. A door lock comprising the door lock locking mechanism of any one of claims 1-16.

Images