CN222686386U - Unlocking structure of door lock - Google Patents

Abstract

The utility model discloses an unlocking structure of a door lock, which comprises a lock shell, wherein one side of the lock shell is provided with an inclined tongue and a square tongue in a sliding mode, a counter lock plate and an unlocking plate are arranged in the lock shell in a sliding mode, the counter lock plate is arranged in the lock shell in a sliding mode up and down, the counter lock plate slides to the rear of the square tongue and can prevent the square tongue from retracting into the lock shell, the lower end portion of the unlocking plate is rotatably arranged on the lock shell, the upper end portion of the unlocking plate is matched with the inclined tongue, the square tongue is in linkage with the unlocking plate through a linkage piece, a lock cylinder rotating core connected with a lock cylinder is further rotatably arranged in the lock shell, the lock cylinder rotating core is rotated, a shifting block on one side of the lock cylinder rotating core pushes the counter lock plate to slide upwards to enable the counter lock plate to be separated from the square tongue, the shifting block continues to push the unlocking plate to rotate, the unlocking plate drives the square tongue and the inclined tongue to retract into the lock shell through the linkage piece, an extradoor operator can unlock the square tongue and the inclined tongue to retract into the lock shell through a key, and unlocking plate can be unlocked through a key, so that an extradoor operator can unlock through the key.

Description

Unlocking structure of door lock

Technical Field

The utility model relates to the field of door locks, in particular to an unlocking structure of a door lock.

Background

In order to control the entrance and exit, a door lock device capable of executing a locking function is arranged on a door leaf, the door lock device comprises a lock shell arranged on the door leaf, a bevel tongue and a square tongue arranged in the lock shell, a door handle respectively arranged inside and outside the door leaf is rotated up and down to lock or unlock the door, and in order to prevent personnel outside the door from entering from outside the door, the door lock is required to be locked reversely through a reverse locking structure;

After the existing door lock is locked in a house, a person outside the door cannot unlock through a key, namely, after the person in the house is locked in the door, the person outside the door cannot unlock through the key, and the door lock has potential safety hazards under emergency conditions.

Disclosure of utility model

Aiming at the defects existing in the prior art, the utility model aims to provide an unlocking structure of a door lock.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

An unlocking structure of a door lock comprises a lock shell, wherein one side of the lock shell is provided with an inclined tongue and a square tongue in a sliding manner, a counter lock plate and an unlocking plate are arranged in the lock shell, the counter lock plate is arranged in the lock shell in a sliding manner up and down, and the counter lock plate slides to the rear of the square tongue and can prevent the square tongue from retracting into the lock shell;

The lower end part of the unlocking plate is rotatably arranged on the lock shell, the upper end part of the unlocking plate is matched with the inclined tongue, and the square tongue is linked with the unlocking plate through a linkage piece;

The lock cylinder rotating core is further rotatably arranged in the lock shell, the lock cylinder rotating core is rotated, a shifting block on one side of the lock cylinder rotating core pushes the counter lock plate to slide upwards to enable the counter lock plate to be separated from the square tongue, the lock cylinder rotating core is continuously rotated, the shifting block can push the unlocking plate to rotate, the unlocking plate drives the square tongue to retract into the lock shell through the linkage piece, and meanwhile the upper end portion of the unlocking plate pushes the inclined tongue to retract into the lock shell.

The utility model further provides that the linkage piece is rotatably arranged on the lock shell, the right side of the linkage piece is provided with a linkage abutting part matched with the unlocking plate, and the left side of the linkage piece is provided with a linkage shaft;

The connecting plate at the rear of the square tongue is obliquely provided with a linkage hole, the linkage shaft is arranged in the linkage hole, the unlocking plate pushes the linkage abutting part to drive the linkage piece to rotate, and the linkage shaft pushes the square tongue to slide into the lock shell.

The utility model further provides that the upper end and the lower end of the linkage hole are respectively provided with a locking positioning groove and an unlocking positioning groove, and the linkage shaft is arranged in the locking positioning groove or the unlocking positioning groove, so that the square tongue is stably positioned at the locking or unlocking position.

The utility model further provides that a handle rotating core connected with the door handle is also rotatably arranged in the lock shell, and the handle rotating core is matched with the upper end part of the unlocking plate through an unlocking component;

The unlocking assembly comprises an unlocking driving plate connected to the lower end part of the handle rotating core and an unlocking linkage plate rotatably arranged on the left side of the unlocking plate;

The handle rotating core pushes the unlocking linkage plate to rotate through the unlocking driving plate, so that the lower end part of the unlocking linkage plate pushes the unlocking plate to rotate, and the unlocking plate pushes the inclined tongue and the square tongue to retract into the lock shell.

The utility model further provides that the upper end part of the handle rotating core is sleeved with a reverse locking linkage plate, the inner side wall of a sleeved hole of the reverse locking linkage plate is provided with an inwards protruding containing groove provided with a limiting protruding part and an outwards recessed containing groove, the outer side wall of the handle rotating core is provided with a matching part, the matching part is arranged in the containing groove, and a gap is reserved between the containing groove and the matching part;

The lower end of the back-locking linkage plate is hinged with the upper end of the linkage piece, when the door handle is lifted reversely, the handle rotating core is matched with the limiting protruding part through the matching part to drive the back-locking linkage plate to rotate, so that the back-locking linkage plate drives the linkage piece to rotate, and the linkage shaft on the linkage piece pushes the square tongue to extend out of the lock shell.

The utility model further provides that the upper end part of the anti-lock plate is convexly provided with an anti-lock end part towards one side of the square tongue, the lower end part of the anti-lock plate is matched with an anti-lock shifting fork rotatably arranged on the lock shell, and the anti-lock shifting fork is connected with an anti-lock knob in the door;

When the square tongue slides out of the lock shell, the reverse locking knob is rotated to drive the reverse locking shifting fork to rotate so as to drive the reverse locking plate to slide downwards, and the reverse locking end part is arranged at the rear of the square tongue so as to prevent the square tongue from retracting into the lock shell.

The utility model further provides that a matching groove is formed in one side, facing the back-locking shifting fork, of the lower end part of the back-locking plate, and a shifting rod of the back-locking shifting fork is arranged in the matching groove so as to push the back-locking plate to slide up and down.

The utility model further provides that the anti-lock plate is provided with a limit hole, and the lock shell is provided with a limit piece;

the limiting piece is arranged in the limiting hole and limits the vertical sliding distance of the counter lock plate.

The utility model has the advantages that the anti-lock knob in the door drives the anti-lock plate to slide to the rear of the square tongue, thereby preventing the square tongue from retracting into the lock shell and realizing the anti-lock of the door lock; the key continuously drives the lock core rotating core, the shifting block can push the unlocking plate to rotate, the unlocking plate can drive the square tongue to retract into the lock shell through the linkage piece, and meanwhile, the upper end part of the unlocking plate pushes the inclined tongue to retract into the lock shell, so that unlocking operation of the door lock is realized;

Under the condition that the door lock is locked in the door, the lock can be unlocked by the key, and then the unlocking plate is pushed to retract the square tongue and the inclined tongue into the lock shell, so that the unlocking operation of the door lock is realized, and personnel outside the door can unlock by the key under emergency conditions, so that potential safety hazards are eliminated.

Drawings

Fig. 1 is a schematic diagram of an unlocking state of an unlocking structure of a door lock according to the present utility model;

Fig. 2 is a schematic diagram of a back locking state of an unlocking structure of a door lock according to the present utility model;

Fig. 3 is a schematic diagram of unlocking a lock core rotary core of an unlocking structure of a door lock according to the present utility model;

fig. 4 is a diagram showing the combination of an unlocking assembly and an unlocking plate of an unlocking structure of a door lock according to the present utility model;

FIG. 5 is an internal view showing the back-lifting of the handle for back-locking of the unlocking structure of the door lock according to the present utility model;

FIG. 6 is a diagram showing the cooperation of the counter-locking linkage plate and the linkage member of the unlocking structure of the door lock according to the present utility model;

Fig. 7 is a schematic structural view of a counter-locking linkage plate of an unlocking structure of a door lock according to the present utility model;

FIG. 8 is a schematic view of a handle core of an unlocking structure of a door lock according to the present utility model;

FIG. 9 is a schematic diagram of a latch bolt of an unlocking structure of a door lock according to the present utility model;

The reference numerals are 1, a lock shell, 11, a latch bolt, 12, a square bolt, 121, a connecting plate, 1211, a linkage hole, 12111, a locking positioning groove, 12112, an unlocking positioning groove, 13, a handle rotating core, 131, a matching part, 14, a limiting piece, 15, a reverse locking shifting fork, 151, a shifting lever, 16, a lock cylinder rotating core, 161, a shifting block, 2, a reverse locking plate, 21, a reverse locking end 22, a matching groove 23, a limiting hole, 3, a unlocking plate, 4, a linkage piece, 41, a linkage abutting part, 42, a linkage shaft, 5, an unlocking component, 51, an unlocking driving plate 52, an unlocking linkage plate, 6, a reverse locking linkage plate, 61, a sleeved hole, 611, a limiting protruding part, 612 and a containing groove.

Detailed Description

An unlocking structure of a door lock according to the present utility model will be described in further detail with reference to fig. 1 to 9.

An unlocking structure of a door lock comprises a lock shell 1, wherein one side of the lock shell is provided with an inclined tongue 11 and a square tongue 12 in a sliding manner, the inclined tongue 11 is sleeved with a reset spring, the reset spring can enable the inclined tongue 11 in the retracted lock shell 1 to automatically extend out of the lock shell 1, an anti-lock plate 2 and an unlocking plate 3 are arranged in the lock shell 1, the anti-lock plate 2 is arranged in the lock shell 1 in a sliding manner, the anti-lock plate 2 slides to the rear of the square tongue 12 and can prevent the square tongue 12 from retracting into the lock shell 1, the anti-lock plate 2 is matched with an anti-lock shifting fork 15, the anti-lock shifting fork 15 is connected with an anti-lock knob in a door, the lower end part of the unlocking plate 3 is rotatably arranged on the lock shell 1, the upper end part of the unlocking plate is matched with the inclined tongue 11, the square tongue 12 is linked with the unlocking plate 3 through a linkage piece 4, a lock core 16 connected with the lock core rotating piece 16 is also rotatably arranged in the lock shell 1, a shifting block 161 on one side of the anti-lock core 16 pushes the anti-lock plate 2 to slide upwards, the anti-lock plate 12 is enabled to be prevented from retracting into the lock shell 1, the anti-lock core 12 is pushed by the anti-lock core 12, and the anti-lock core 12 is pushed by the anti-lock core rotating piece 161 to be separated from the lock core rotating the lock core 12, and the lock core 3 is pushed by the anti-lock core 3, and the lock core 11 is pushed by the anti-lock core, and the lock core 11 is simultaneously pushed by the lock core;

when a person in the door rotates the back locking knob, the back locking knob drives the back locking plate 2 to slide to the back of the square tongue 12, the square tongue 12 is prevented from retracting into the lock shell 1, the back locking of the door lock is realized, the person outside the door can rotate the lock cylinder rotating core 16 through a key, a shifting block 161 on one side of the lock cylinder rotating core 16 can push the back locking plate 2 to slide upwards so as to separate the back locking plate 2 from the square tongue 12, the back locking of the door lock is released, the key continues to drive the lock cylinder rotating core 16, the shifting block 161 can push the unlocking plate 3 to rotate, the unlocking plate 3 can drive the square tongue 12 to retract into the lock shell 1 through a linkage piece 4, meanwhile, the upper end part of the unlocking plate 3 pushes the inclined tongue 11 to retract into the lock shell 1, so that the unlocking operation of the door lock is realized, namely, under the condition that the door lock is back locked in the door, the door lock is unlocked through the key, the square tongue 12 and the inclined tongue 11 are pushed to retract into the lock shell 1, so that the person outside the door can unlock through the key under the emergency condition, and the safety hazards are eliminated.

The unlocking plate 3 pushes the linkage abutting part 41 to drive the linkage 4 to rotate, the linkage 4 drives the linkage shaft 42 to slide along the linkage hole 1211 in the rotating process, the linkage shaft 42 pushes the hole wall of the linkage hole 1211 to push the square tongue 12 to retract into the lock shell 1, the upper end and the lower end of the linkage hole 1211 are respectively provided with a locking positioning groove 12111 and an unlocking positioning groove 12112, the linkage shaft 42 is arranged in the locking positioning groove 12111 or the unlocking positioning groove 12112, and the square tongue 12 is stably positioned at the locking or unlocking position.

In order to unlock the door handle, a handle rotation 13 connected with the door handle is further rotatably arranged in the lock shell 1, the handle rotation core 13 is matched with the upper end part of the unlocking plate 3 through an unlocking component 5, the unlocking component 5 comprises an unlocking driving plate 51 connected to the lower end part of the handle rotation core 13 and an unlocking linkage plate 52 rotatably arranged on the left side of the unlocking plate 3, the handle rotation core 13 pushes the unlocking linkage plate 52 to rotate through the unlocking driving plate 51, the lower end part of the unlocking linkage plate 52 pushes the unlocking plate 3 to rotate, the unlocking plate 3 pushes the inclined tongue 11 and the inclined tongue 12 to retract into the lock shell 1, namely, in the state that the door lock is not locked by the counter locking plate 2, the handle rotation 13 drives the unlocking driving plate 51 to drive the lower end part of the unlocking linkage plate 52 to push the unlocking plate 3 to rotate, and the unlocking plate 3 drives the inclined tongue 12 and the inclined tongue 11 to retract into the lock shell 1, so that unlocking operation is realized.

In order to realize that the square tongue 12 extends out of the lock shell 1, the upper end part of the handle rotating core 13 is sleeved with a back-locking linkage plate 6, the inner side wall of a sleeved hole 61 of the back-locking linkage plate 6 is provided with an inwards protruding containing groove 612 provided with a limiting protruding part 611 and an outwards recessed containing groove 612, the outer side wall of the handle rotating core 13 is provided with a matching part 131, the matching part 131 is arranged in the containing groove 612, and a gap is reserved between the containing groove 612 and the matching part 131, so that when a door handle is lifted, the matching part 131 of the handle rotating core 13 rotates to abut against the limiting protruding part 611, the handle rotating core 13 drives the back-locking linkage plate 6 to rotate, and because a gap is reserved between the containing groove 612 and the matching part 131, when the door handle is pressed down, the handle rotating core 13 and the back-locking linkage plate 6 are relatively rotated, and the back-locking linkage plate 6 are not driven to rotate, and the unlocking driving plate 51 is only driven to rotate;

the lower end part of the back-locking linkage plate 6 is hinged with the upper end part of the linkage piece 4, and the hinge hole on the lower end part of the back-locking linkage plate 6 is larger than the hinge shaft on the linkage piece 4, so that interference of the back-locking linkage plate and the linkage piece in the linkage process is avoided;

when the door lock is locked reversely and the door handle is lifted reversely, the handle rotating core 13 is matched with the limiting protruding part 611 through the matching part 131 to drive the reverse locking linkage plate 6 to rotate, so that the reverse locking linkage plate 6 drives the linkage piece 4 to rotate, and the linkage shaft 42 on the linkage piece 4 pushes the square tongue 12 to extend out of the lock shell 1.

Wherein, the upper end part of the anti-lock plate 2 is convexly provided with an anti-lock end part 21 towards one side of the square tongue 12, the lower end part of the anti-lock plate 2 is matched with an anti-lock shifting fork 15 rotatably arranged on the lock shell 1, and the anti-lock shifting fork 15 is connected with an anti-lock knob in a door;

The anti-lock handle is characterized in that after the square tongue 12 slides out of the lock shell 1, the anti-lock knob is rotated to drive the anti-lock shifting fork 15 to rotate to drive the anti-lock plate 2 to slide downwards, the anti-lock end 21 is arranged at the rear of the square tongue 12 to prevent the square tongue 12 from retracting into the lock shell 1, namely, the anti-lock plate 2 can slide downwards and is arranged at the rear of the square tongue 12 only after the anti-lift handle drives the square tongue 12 to extend out of the lock shell 1, in an unlocking state, the anti-lock end 21 of the anti-lock plate 2 is arranged on the upper end face of the square tongue 12 and cannot slide downwards, namely, when people rotate the anti-lock knob to lock a door lock, people can only rotate the anti-lock knob through the anti-lift handle firstly, so that children in the door can unlock the door lock by mistake under the condition of no intention.

The lower end of the anti-lock plate 2 is provided with a matching groove 22 towards one side of the anti-lock shifting fork 15, a shifting rod 151 of the anti-lock shifting fork 15 is arranged in the matching groove 22, when the anti-lock knob drives the shifting fork to rotate anticlockwise, the shifting rod 151 abuts against the bottom wall of the matching groove 22 and pushes the anti-lock plate 2 to slide downwards, so that the anti-lock end 21 is arranged behind the square tongue 12, the square tongue 12 is locked, and when the anti-lock knob drives the shifting fork to rotate clockwise, the shifting rod 151 abuts against the upper wall of the matching groove 22 and pushes the anti-lock plate 2 to slide upwards, and the locking of the square tongue 12 is released.

The anti-lock plate 2 is provided with a limiting hole 23, the lock shell 1 is provided with a limiting piece 14, the limiting piece 14 is arranged in the limiting hole 23 to limit the up-and-down sliding distance of the anti-lock plate 2, and the structural stability of the door lock is improved.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (8)

1. The unlocking structure of the door lock comprises a lock shell, wherein one side of the lock shell is provided with an inclined tongue and a square tongue in a sliding manner, and the unlocking structure is characterized in that a counter lock plate and an unlocking plate are arranged in the lock shell, the counter lock plate is arranged in the lock shell in a vertical sliding manner, and the counter lock plate slides to the rear of the square tongue and can prevent the square tongue from retracting into the lock shell;

The lower end part of the unlocking plate is rotatably arranged on the lock shell, the upper end part of the unlocking plate is matched with the inclined tongue, and the square tongue is linked with the unlocking plate through a linkage piece;

The lock cylinder rotating core is further rotatably arranged in the lock shell, the lock cylinder rotating core is rotated, a shifting block on one side of the lock cylinder rotating core pushes the counter lock plate to slide upwards to enable the counter lock plate to be separated from the square tongue, the lock cylinder rotating core is continuously rotated, the shifting block can push the unlocking plate to rotate, the unlocking plate drives the square tongue to retract into the lock shell through the linkage piece, and meanwhile the upper end portion of the unlocking plate pushes the inclined tongue to retract into the lock shell.

2. The unlocking structure of the door lock according to claim 1, wherein the linkage member is rotatably disposed on the lock housing, a linkage abutting portion matched with the unlocking plate is disposed on the right side of the linkage member, and a linkage shaft is disposed on the left side of the linkage member;

The connecting plate at the rear of the square tongue is obliquely provided with a linkage hole, the linkage shaft is arranged in the linkage hole, the unlocking plate pushes the linkage abutting part to drive the linkage piece to rotate, and the linkage shaft pushes the square tongue to slide into the lock shell.

3. The unlocking structure of the door lock according to claim 2, wherein the upper end and the lower end of the linkage hole are respectively provided with a locking positioning groove and an unlocking positioning groove, and the linkage shaft is arranged in the locking positioning groove or the unlocking positioning groove, so that the square tongue is stably positioned at the locking or unlocking position.

4. The unlocking structure of a door lock according to claim 1, 2 or 3, wherein a handle rotating core connected with a door handle is further rotatably arranged in the lock shell, and the handle rotating core is matched with the upper end part of the unlocking plate through an unlocking component;

The unlocking assembly comprises an unlocking driving plate connected to the lower end part of the handle rotating core and an unlocking linkage plate rotatably arranged on the left side of the unlocking plate;

The handle rotating core pushes the unlocking linkage plate to rotate through the unlocking driving plate, so that the lower end part of the unlocking linkage plate pushes the unlocking plate to rotate, and the unlocking plate pushes the inclined tongue and the square tongue to retract into the lock shell.

5. The unlocking structure of the door lock according to claim 4, wherein the upper end part of the handle rotating core is sleeved with a back locking linkage plate, the inner side wall of a sleeved hole of the back locking linkage plate is provided with an inwards protruding containing groove provided with a limiting protruding part and an outwards recessed containing groove, the outer side wall of the handle rotating core is provided with a matching part, the matching part is arranged in the containing groove, and a gap is reserved between the containing groove and the matching part;

The lower end of the back-locking linkage plate is hinged with the upper end of the linkage piece, when the door handle is lifted reversely, the handle rotating core is matched with the limiting protruding part through the matching part to drive the back-locking linkage plate to rotate, so that the back-locking linkage plate drives the linkage piece to rotate, and the linkage shaft on the linkage piece pushes the square tongue to extend out of the lock shell.

6. The unlocking structure of a door lock according to claim 1, 2 or 3, wherein the upper end of the counter lock plate is provided with a counter lock end part towards one side of the square tongue in a protruding way, the lower end of the counter lock plate is matched with a counter lock shifting fork rotatably arranged on the lock shell, and the counter lock shifting fork is connected with a counter lock knob in the door;

When the square tongue slides out of the lock shell, the reverse locking knob is rotated to drive the reverse locking shifting fork to rotate so as to drive the reverse locking plate to slide downwards, and the reverse locking end part is arranged at the rear of the square tongue so as to prevent the square tongue from retracting into the lock shell.

7. The unlocking structure of the door lock according to claim 6, wherein a mating groove is formed in a side of the lower end portion of the counter lock plate, which faces the counter lock fork, and a deflector rod of the counter lock fork is placed in the mating groove to push the counter lock plate to slide up and down.

8. The unlocking structure of the door lock according to claim 7, wherein the anti-lock plate is provided with a limit hole, and the lock shell is provided with a limit piece;

the limiting piece is arranged in the limiting hole and limits the vertical sliding distance of the counter lock plate.