CN217205854U - Door lock - Google Patents

Abstract

The utility model relates to a tool to lock technical field discloses a lock, including setting up spring bolt subassembly, interior peach, outer peach, well peach, reset spring, lock plate and the locking spring of dialling in the lock casing to and rotate the interior handle of being connected with interior peach, rotate the outer handle of being connected with outer peach. The inner shift peach and the outer shift peach can be driven to rotate through the inner handle and the outer handle, and then the lock tongue assembly is driven to slide in the shell, so that unlocking is realized; reset spring can drive the spring bolt subassembly and accomplish and reset, and the lock plate can restrict the rotation of outer thumb wheel and realize the back lock, and well thumb wheel drives the lock plate horizontal migration and can realize the back lock and relieve the back lock. When the door lock is in a back locking state, the back locking can be released by lifting the inner handle, and the door lock has the advantage of convenience and quickness in unlocking; when the door is closed, the bolt assembly moves towards the inside of the shell, and the back locking can be released, so that the function that the back locking cannot be performed when no person is on one side in the door is realized, and the door has high safety.

Description

Door lock

Technical Field

The utility model relates to a tool to lock technical field, it is specific, relate to a lock.

Background

For the door lock of indoor rooms, such as the door lock of a bedroom, a bathroom, a children room or an old people room, because the door lock of entering the house has a strong security protection function, the requirement of privacy protection is mainly considered when the door lock of the house is designed, and correspondingly, the door lock can cancel the function of unlocking the door lock through a key outdoors and is provided with an emergency switch structure. The patent with the application number of CN202110960074.X discloses a lock cylinder structure and a door lock, wherein the lock cylinder structure can be unlocked by rotating an inner dial peach under the state of back locking, and has the advantage of convenient unlocking; when the door is closed, the bolt assembly moves towards the inside of the shell, and the back locking can be released, so that the function that the back locking cannot be performed when no person is on one side in the door is realized, and the door has high safety. But its structure that realizes the back locking function is comparatively complicated, need set up alone the member that can rotate the centre dial peach, and increases the probability that the component can increase the tool to lock trouble.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a solve above-mentioned technical problem and make, its purpose provides a lock, under the prerequisite that has less structure, can unblank, the operation of locking back conveniently.

In order to achieve the above object, the present invention provides a door lock, including: a housing; the lock tongue component is arranged in the shell in a sliding mode and can slide along the telescopic direction of the lock tongue; the inner shifting peach is rotatably arranged in the shell, and a first unlocking boss is arranged on the periphery of the inner shifting peach; the outer shifting peach is rotatably arranged in the shell, and a second unlocking boss is arranged on the periphery of the outer shifting peach; the middle shifting peach is rotatably arranged between the inner shifting peach and the outer shifting peach, and the periphery of the middle shifting peach is provided with an unlocking baffle plate extending towards one side of the inner shifting peach, a limiting baffle plate extending towards one side of the outer shifting peach and a shifting block opposite to the unlocking baffle plate; the return spring is arranged in the shell and applies an acting force towards the outer side to the bolt assembly; the limiting device comprises a locking piece, a limiting baffle plate and a limiting lug plate, wherein one end of the locking piece is provided with a stopping part surrounding the periphery of the outer shifting peach or the middle shifting peach, one side of the locking piece is provided with a limiting lug boss opposite to the limiting baffle plate, and the upper side and/or the lower side of the limiting lug boss is/are provided with a limiting groove gradually sunken into the locking piece; the locking spring is arranged between the locking piece and the inner wall of the shell and applies acting force towards one side of the outer shifting peach to the locking piece; the inner handle is rotatably connected with the inner peach-shifting handle; the outer handle is rotatably connected with the outer peach-shaped shifting handle; when the limiting baffle abuts against the limiting boss, the stopping part is positioned on the periphery of the middle shifting peach; when the inner handle or the outer handle rotates towards one side, the first unlocking boss or the second unlocking boss abuts against the bolt assembly and pushes the bolt assembly into the shell; when the inner handle rotates towards the other side, the first unlocking boss abuts against the shifting block to push the middle shifting peach to rotate towards the side, the unlocking baffle is located on the motion track of the spring bolt assembly, the limiting baffle moves to the limiting groove, at the moment, the locking piece slides towards one side of the outer shifting peach under the action of the locking spring, and the stopping part is located on the periphery of the outer shifting peach.

Preferably, the spring bolt subassembly includes spring bolt and spring bolt drive frame, the spring bolt drive frame slides and sets up in the casing, the one end of spring bolt drive frame is equipped with the butt and is in keeping away from of first unblock boss and second unblock boss the unblock ka tai of the side of spring bolt.

Preferably, the latch bolt is rotatably connected with the driving frame.

Preferably, the other end of the locking piece is provided with a rotating shaft; still be provided with the locking plate base in the casing, be provided with the holding on the locking plate base the vertical shaft groove of rotation axis.

Preferably, the upper end and the lower end of the base of the locking plate are arranged on the sliding track of the lock tongue assembly to limit the sliding distance of the lock tongue assembly to the shell.

Preferably, the locking piece base is provided with a mounting hole for the locking spring to pass through;

after the locking spring penetrates through the mounting hole, two ends of the locking spring are respectively abutted against the locking sheet and the shell.

Preferably, the method further comprises the following steps: and the emergency unlocking structure is arranged on the outer handle and is rotationally connected with the middle shift peach.

Preferably, the emergency unlocking structure is a rod piece, the inner end of the rod piece is inserted into the center of the middle shifting peach, the outer end of the rod piece is rotatably arranged in the center of the outer handle, and an oval or polygonal groove is formed in the outer end face of the rod piece.

As can be seen from the above description and practice, the door lock of the present invention has the following advantages:

1. the door lock of the utility model is provided with an inner shifting peach, an outer shifting peach, a middle shifting peach, a locking sheet, a spring bolt component, a reset spring, a locking spring, an inner handle and an outer handle, wherein the inner shifting peach and the outer shifting peach can be driven to rotate through the inner handle and the outer handle, and then the spring bolt component is driven to slide in the shell to realize unlocking; the reset spring can drive the lock tongue component to complete reset; the locking piece can limit the rotation of the outer shifting peach to realize back locking; the inner shifting peach can also drive the middle shifting peach to rotate and enable the locking sheet to horizontally move, namely, the locking and unlocking can be realized only through the inner shifting peach. The door lock can be reversely locked by lifting the inner handle, and can be unlocked and unlocked by pressing the inner handle downwards, so that the door lock has the advantage of convenience and quickness in unlocking; when the door is closed, the lock tongue component can slide in the shell and can be in contact with the inside of the shell to be locked, the function that the lock cannot be locked when no person is on one side inside the door is achieved, and the door has high safety.

2. The lock tongue in the door lock of the utility model is rotationally connected with the lock tongue driving frame, which can be suitable for left-opening and right-opening doors; still set up the home range that the locking plate base can restrict the locking plate in the casing, prevent that it from breaking away from predetermined position, improved the life of the lock body structure in the lock.

3. The utility model discloses a lock has still set up emergent unlocking structure, can realize removing the back lock outdoors under emergency, can not back lock outdoors one side simultaneously, has further improved the security.

Drawings

Fig. 1 is a schematic structural view of a door lock according to an embodiment of the present invention.

Fig. 2a and 2b are schematic views of two cross sections of a door lock according to an embodiment of the present invention, where the two cross sections are perpendicular to each other.

Fig. 3a and 3b are schematic internal structural diagrams of a lock body structure according to an embodiment of the present invention at two viewing angles.

Fig. 4a and 4b are exploded schematic views of a lock body structure according to an embodiment of the present invention at two viewing angles.

Fig. 5 is a schematic structural diagram of a middle shift peach according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of an inner peach according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a locking plate according to an embodiment of the present invention.

The reference numbers in the figures are:

1. a shell body 11, a sliding chute 12 and a fixing plate;

2. the locking bolt assembly comprises a locking bolt assembly 21, a sliding block 22, a locking bolt 23, a locking bolt driving frame 24 and an unlocking clamping table;

3. an inner shifting peach 31 and a first unlocking boss;

4. an outer shifting peach 41 and a second unlocking boss;

5. a middle shifting peach 51, an unlocking baffle 52 and a limiting baffle;

6. the locking device comprises a locking piece 61, a stopping part 62, a limiting boss 63, a limiting groove 64 and a rotating shaft;

7. a locking spring;

8. a return spring;

9. a locking piece base 91, a shaft groove 92 and a mounting hole;

20. interior handle, 30, outer handle, 40, emergent unblock structure.

Detailed Description

Exemplary embodiments will now be described more fully with reference to the accompanying drawings. The exemplary embodiments, however, may be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. In the present disclosure, the terms "include", "arrange", "disposed" and "disposed" are used to mean open-ended inclusion, and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and the like are used merely as labels, and are not limiting as to the number or order of their objects; the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1 is a schematic structural view of the door lock in the embodiment, showing a three-dimensional structure of the door lock; fig. 2a and 2b are schematic sectional views of the door lock in the embodiment, the two sections are perpendicular to each other, and the connection relationship between the handle and the lock body structure is shown; figures 3a and 3b are schematic structural views of the lock body structure in this embodiment from both inside and outside views, showing the connection of the internal components of the lock body structure, in which only one half-shell of the housing is shown; fig. 4a and 4b are exploded views of the lock body structure in the embodiment from inside and outside view angles, showing the detailed structure and connection relationship of the various components of the lock body structure from inside and outside view angles, wherein the structure of the shell is removed. FIG. 5 is a schematic structural diagram of the middle peach-shift in this embodiment, showing the three-dimensional structure of the middle peach-shift; FIG. 6 is a schematic structural view of the inner peach shift in this embodiment, showing the three-dimensional structure of the inner peach shift; fig. 7 is a schematic structural view of the locking piece in this embodiment, showing a three-dimensional structure of the locking piece.

Referring to fig. 1 to 2b, the door lock in this embodiment includes a lock body structure and an inner handle 20 and an outer handle 30 disposed at both sides thereof, wherein the inner handle 20 is rotatably connected to an inner stem 3 of the lock body structure, and the outer handle 30 is rotatably connected to an outer stem 4 of the lock body structure. The components within the lock body structure can be rotated by rotating the inner handle 20 and the outer handle 30 to achieve unlocking and counter-locking.

The components within the lock body structure and their connections will first be described. Referring to fig. 2a to 7, the lock body structure in this embodiment includes a bolt assembly 2, an inner dial 3, an outer dial 4, a middle dial 5, a locking plate 6, a locking spring 7 and a return spring 8, which are disposed in a housing 1. The housing 1 may be formed by two half shells fastened together, and a cavity for accommodating the above components is formed between the two half shells, and only one half shell of the housing 1 is shown in fig. 3a and 3b for showing the internal structure of the door lock. One end surface of the shell 1 is provided with a bolt hole for the bolt to stretch.

The bolt assembly 2 is slidably disposed in the housing 1 and can slide along the extension direction (X-axis direction in the drawing) of the bolt. Specifically, the inner wall of the housing 1 is provided with a sliding groove 11 along the X-axis direction, the latch bolt assembly 2 is provided with a sliding block 21 embedded in the sliding groove, and the latch bolt assembly 2 can slide in the sliding groove 11 under the shifting of the latch bolt or the inner shift block 3 and the outer shift block 4. In this embodiment, the latch bolt assembly 2 includes a latch bolt 22 and a latch bolt driving frame 23, and the slider 21 is provided on the latch bolt driving frame 23. The lock tongue 22 is arranged at one end of the lock tongue driving frame 23, and along with the sliding of the lock tongue driving frame 23 in the casing 1, the lock tongue 22 can extend out of the casing 1 or retract into the casing 1. In addition, locking bolt 22 is rotatably connected to locking bolt driving frame 23, and the inclined surface of locking bolt 22 can be rotated when mounting, so that the door can be opened left or right.

In this embodiment, the inner and outer picks 3 and 4 are identical in construction and are both disposed within the housing 1 and rotatable about the Y axis of the drawing. After using this lock body structure at the lock, interior thumb peach 3 corresponds the inboard handle of lock, and outer thumb peach 4 corresponds the handle in the lock outside. The periphery of the inner peach-shifting 3 is provided with a first unlocking boss 31, and the periphery of the outer peach-shifting 4 is provided with a second unlocking boss 41.

Please combine fig. 6 to show a structural form of the inner shift peach 3, the periphery of the inner shift peach 3 is provided with a first unlocking boss 31 facing the upper side, please combine fig. 3a and fig. 4a, the first unlocking boss 31 and the second unlocking boss 41 are provided at one side of the latch bolt assembly 2, correspondingly, one end of the latch bolt driving frame 23 far away from the latch bolt 22 is provided with an unlocking clamping table 24, and the unlocking clamping table 24 abuts against the side surface of the first unlocking boss 31 and the second unlocking boss 41 far away from the latch bolt 22. When interior shift peach 3 or outer shift peach 4 clockwise rotation, first unblock boss 31 or second unblock boss 41 butt can drive spring bolt subassembly 2 and slide to casing 1 on unblock ka tai 24, realize the unblock.

The bolt assembly 2, the inner shift peach 3 and the outer shift peach 4 are in a structural form and a connection relation, the bolt assembly 2 is driven to slide towards the inside of the shell 1 through the inner shift peach 3 and the outer shift peach 4, in other embodiments, the existing structure can be adopted to replace the structural form, and the functions can be achieved.

Referring to fig. 4 a-7, the middle picks 5 are disposed between the inner picks 3 and the outer picks 4, and are also rotatable about the Y-axis in the drawings. The periphery of the middle shifting peach 5 is provided with an unlocking baffle 51 extending towards one side of the inner shifting peach 3, a limit baffle 52 extending towards one side of the outer shifting peach 4 and a shifting block 53 opposite to the unlocking baffle 51. The poking block 53 is arranged on one side, far away from the unlocking clamping table 24, of the first unlocking boss 31, and when the inner poking peach 3 in fig. 4a rotates anticlockwise, the side face of the first unlocking boss 31 abuts against the poking block 53, so that the middle poking peach 5 is driven to rotate anticlockwise until the end part of the unlocking baffle 51 is located on the motion track of the bolt assembly 2. Specifically, one end of the unlocking baffle 51 is located on the side of the unlocking block 24 far away from the lock tongue 22, and at this time, if the lock tongue driving frame 23 slides into the housing 1, the unlocking block 24 will push the unlocking baffle 51 to move towards the negative side of the X axis in the drawing, and since the middle shift peach 5 is rotatably disposed in the housing 1, the middle shift peach 5 will rotate clockwise around the Y axis in fig. 4a correspondingly. In other words, when the latch bolt assembly 2 slides into the housing 1 in this state, the middle shift peach 5 can be driven to rotate.

It should be noted that, because the inner peach-shifting 3 needs to drive the middle peach-shifting 5 to rotate, a protrusion which can be matched with the shifting block 53 is arranged on the first unlocking boss 31, in this embodiment, the structural form of the outer peach-shifting 4 is set to be the same as that of the inner peach-shifting 3, so that the two only need the same mold when being manufactured, and the manufacturing cost can be reduced. In other embodiments, the protrusion on the outer thumb wheel 4 is eliminated, and it is only necessary to ensure that the second unlocking protrusion 41 can push the latch bolt assembly 2 to move.

Referring to fig. 3a to 4b, the locking plate 6 is disposed in the housing 1, and a stop portion 61 surrounding the outer rim 4 or the middle rim 5 is disposed at an end of the locking plate 22, in other words, the stop portion 61 can move around the outer rim 4 or the middle rim 5. When the stopping portion 61 surrounds the outer circumference of the outer gear 4, the end portion thereof is located on the motion track of the second unlocking protrusion 41, and at this time, the rotation of the outer gear 4 is limited, and accordingly, the locking tongue assembly 2 cannot be driven to move into the housing 1, and finally, the back locking is realized (i.e., the outer gear cannot be rotated outside the lock structure). When the stopping part 61 is positioned at the periphery of the middle shift peach 5, the rotation of the outer shift peach 4 and the middle shift peach 5 is not limited, namely, the back locking is released.

In addition, referring to fig. 7, a limiting boss 62 facing the limiting baffle 52 is disposed on one side of the locking plate 6 close to the outer dial 4, and limiting grooves 63 gradually recessed into the locking plate 6 are disposed on both sides of the limiting boss 62. The surface of the limit boss 62 and the surface of the limit groove 63 are smoothly transited to form a plane or a curved surface. When the limiting baffle plate 52 rotates along with the middle shifting peach 5, the limiting baffle plate can be respectively abutted against the surface of the limiting boss 62 or the limiting groove 63. In other words, when the position-limiting baffle 52 is located in the position-limiting groove 63, the middle shifting block 5 is rotated to make the position-limiting baffle 52 slide to the surface of the position-limiting boss 62 along the transition surface between the position-limiting groove 63 and the position-limiting boss 62. Meanwhile, when the limit baffle 52 abuts on the limit boss 62, the stop part 61 is located at the periphery of the middle peach 5 by being blocked by the limit baffle 52.

Referring to fig. 3a to 4b, a locking plate base 9 is further disposed in the housing 1 for controlling the moving range of the locking plate 6 and the moving range of the latch driving frame 23. The locking piece base 9 is provided with a shaft groove 91 at a side close to the outer picks 4, and correspondingly, a rotation shaft 64 is provided at an end of the locking piece 6. In this embodiment, the shaft groove 91 is vertically (Z-axis direction in the drawing), the rotating shaft 64 is disposed in the shaft groove 91, and the locking piece 6 can rotate around the rotating shaft, and the moving range of the stopper 61 is limited to the outer peripheries of the outer and middle picks 4 and 5. In this embodiment, the locking piece base 9 and the shaft groove 91 thereon are provided to allow one end of the locking piece 6 to rotate only around the shaft, and the other end of the locking piece 6 to swing reciprocally, so that the locking piece 6 can be well fixed to move only within a predetermined range while controlling the movement range of the locking piece 6. In other embodiments, the shaft groove 91 may be a sliding groove along the Y-axis direction, and the locking plate 6 is slidably fitted in the sliding groove, so that the stop portion 61 can move on the outer circumference of the outer and middle picks 4 and 5. In addition, the upper and lower tip of lock plate base 9 sets up on bolt assembly 2 is to the gliding orbit of casing 1 for the distance that restriction bolt assembly 2 slided to casing 1 prevents that bolt assembly 2 from to too big to the distance that casing 1 removed, leads to spring bolt 22 to break away from the bolt hole. Of course, the length of the sliding groove 11 can be controlled to control the moving range of the latch bolt assembly 2, and the detailed description is omitted here.

The lock spring 7 is provided between the lock plate 6 and the inner wall of the housing 1, and applies an urging force toward the side of the outward shift peach 4 to the lock plate 6. Therefore, when the limit baffle 52 is in the limit groove 63, the stop part 61 moves to the outer periphery of the outer dial 4 under the action of the locking spring 7, and the counter lock is formed. As shown in fig. 3a, in this embodiment, the locking spring 7 is a spring in a compressed state, and is disposed on one side of the locking piece 6 close to the inner peach 3, and both ends of the locking spring respectively abut against the inner wall of the housing 1 and the side wall of the locking piece 6. Of course, the locking spring 7 can be arranged on one side of the locking piece 6 close to the outer shifting block 4, and the spring in a stretching state is selected, so that the acting force towards one side of the outer shifting block 4 can be applied to the locking piece 6.

In this embodiment, the locking piece base 9 is further provided with a mounting hole 92 through which the locking spring 7 passes. The locking spring 7 penetrates through the mounting hole 92, and then two ends of the locking spring are respectively abutted against the locking sheet 6 and the shell 1. The installation hole 92 is provided to fix the lock spring 7 to prevent radial deformation, so that the lock spring 7 can be in a stable working state for a long time.

Reset spring 8 sets up in casing 1 to exert the effort towards spring bolt 22 one side to spring bolt assembly 2, when the effort was not exerted to spring bolt assembly 2 to inner thumb peach 3, outer thumb peach 4 promptly, reset spring 8 can make spring bolt assembly 2 remove to the outside of casing 1, and spring bolt 22 stretches out outside casing 1. Specifically, in this embodiment, the return spring 8 is a spring in a compressed state, and one end is fixed and the other end abuts on the tongue drive frame 23. As shown in fig. 3a to 4b, in this embodiment, the latch driving frame 23 has a U-shaped structure, so that the return spring 8 is disposed between two sidewalls of the latch driving frame 23. One end of the return spring 8 is fixedly connected to the fixing plate 12 arranged between the inner walls of the two shells 1, and the other end of the return spring abuts against the inner wall of the bolt driving frame 23. When the latch bolt driving frame 23 is not acted by other components, the return spring 8 can push the latch bolt driving frame 23 to the outside of the housing 1, so that the latch bolt 22 extends to the outside of the housing 1.

When the lock body structure is in an initial state (i.e. the state shown in fig. 3a and 4b, at this time, the lock tongue 22 extends out of the housing 1 and is not reversely locked), the first unlocking boss 31 and the second unlocking boss 41 abut against the unlocking clamping table 24, the toggle block 53 abuts against the side surface of the first unlocking boss 31, and the limit baffle 52 abuts against the limit boss 62. At this time, if the inner dial 3 or the outer dial 4 is rotated clockwise as shown in fig. 3a, the lock tongue can be retracted into the housing 1; if the inner shifting peach 3 is rotated counterclockwise according to the position shown in fig. 3a, the middle shifting peach 5 can be driven to rotate counterclockwise, so that the unlocking baffle 51 is positioned at the right side of the unlocking clamping table 24, the limiting baffle 52 moves into the limiting groove 63, the limitation on the locking sheet 6 is released, the locking sheet 6 moves towards one side of the outer shifting peach 4 under the pushing of the locking spring 7, the limiting portion 61 is positioned at the periphery of the outer shifting peach 4, and the rotation of the outer shifting peach 4 is limited, namely, the locking state is achieved; under the state of back locking, clockwise rotation interior shifting peach 3 drives unblock ka tai 24 and moves to the right side to promote unblock baffle 51 and move to the right side, well shifting peach clockwise this moment rotates, makes limit baffle 52 move to the butt on spacing boss 62, because well shifting peach does not have the removal along the Y axle direction, so locking piece 6 can move to interior shifting peach one side, removes the restriction of external shifting peach 4 pivoted, realizes promptly removing the back locking.

This lock body structure is through increasing the interlock relation of interior peach shifting 3 and well peach shifting 5, only can realize the counter-lock through interior peach shifting 3 and relieve the counter-lock, when not counter-locking, all can realize the unblock through inside and outside peach shifting simultaneously, has the convenient characteristics of unblock. In other words, at the inner side of the door, the inner handle 20 is lifted up to turn the inner tumbler 3 and lock is released, and at this time, the lock cannot be unlocked at the outer side of the door by the outer handle 30, and if the lock body structure is in the lock-releasing state by an erroneous operation before the door is closed, the lock tongue 22 is moved into the housing 1 to release the lock when the door is closed, so that the door lock cannot be locked when no one is at the inner side of the door.

In this embodiment, the first unlocking boss 31 and the second unlocking boss 41 are disposed on the upper side of the shift block, and based on the above-mentioned linkage relationship, the limit baffle 52 rotates to the upper side in the back locking process, so that the back locking can be realized only by disposing the limit groove 63 on the upper side of the limit boss 62. It should be noted that when the first unlocking protrusion 31 and the second unlocking protrusion 41 are disposed on the lower side of the thumb wheel, the limiting groove 63 is disposed on the lower side of the limiting protrusion 62. In the embodiment, the upper side and the lower side of the limiting boss 62 are respectively provided with the limiting groove 63, so that the inner shifting peach 3 and the outer shifting peach 4 in the two structural forms can be adapted, and meanwhile, part of manufacturing materials can be saved.

Referring to fig. 2a and 2b, in this embodiment, one end of the inner handle 20 is connected to the inner peach 3 in a synchronous rotation manner, for example, directly connected to the inner handle, or connected to the inner handle through a square tube to achieve synchronous rotation, and the inner peach 3 can be driven to rotate by rotating the inner handle 20, so as to achieve unlocking, locking and unlocking.

The one end of outer handle 30 is rotated with outer peach 4 is synchronous to be connected, for example directly links to each other, perhaps realizes synchronous the rotation through square union coupling, can drive outer peach 4 rotations of dialling through rotating outer handle 30, and then realizes unblanking under the condition that the lock is not locked.

The emergency unlocking structure 40 is a rod in this embodiment, and one end of the inner side of the emergency unlocking structure is inserted in the center of the middle shift peach 5 and can synchronously rotate the middle shift peach 5; its outside one end is rotated and is established the center of outer handle 30, and the two rotates the setting relatively, is equipped with the recess simultaneously on its outer terminal surface, and this recess can be oval, a font, cross or other polygonal structure, can rotate this emergent unblock structure 40 through using the instrument the same with the recess shape. In other words, when the outer handle 30 is rotated, the emergency unlocking structure 40 is not rotated at the same time. When the door lock is in the locking state, the emergency unlocking structure 40 is rotated to drive the middle shifting block 5 to rotate so as to release the locking. The door lock also realizes the emergency unlocking function of one side outside the door, and can not complete the back locking on one side outside the door, thereby having higher safety.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (8)

1. A door lock, comprising:

a housing;

the lock tongue component is arranged in the shell in a sliding mode and can slide along the telescopic direction of the lock tongue;

the inner shifting peach is rotatably arranged in the shell, and a first unlocking boss is arranged on the periphery of the inner shifting peach;

the outer shifting peach is rotatably arranged in the shell, and a second unlocking boss is arranged on the periphery of the outer shifting peach;

the middle shifting peach is rotatably arranged between the inner shifting peach and the outer shifting peach, and the periphery of the middle shifting peach is provided with an unlocking baffle plate extending towards one side of the inner shifting peach, a limiting baffle plate extending towards one side of the outer shifting peach and a shifting block opposite to the unlocking baffle plate;

the return spring is arranged in the shell and applies an acting force towards the outer side to the bolt assembly;

a stop part surrounding the periphery of the outer shifting peach or the middle shifting peach is arranged at one end of the locking sheet, a limiting boss opposite to the limiting baffle plate is arranged at one side of the locking sheet, and a limiting groove gradually sunken into the locking sheet is arranged on the upper side and/or the lower side of the limiting boss;

the locking spring is arranged between the locking piece and the inner wall of the shell and applies acting force towards one side of the outer shifting peach to the locking piece;

the inner handle is rotationally connected with the inner peach shift;

the outer handle is rotatably connected with the outer peach-shaped shifting handle; wherein

When the limiting baffle abuts against the limiting boss, the stopping part is positioned on the periphery of the middle shifting peach; when the inner handle or the outer handle rotates towards one side, the first unlocking boss or the second unlocking boss abuts against the bolt assembly and pushes the bolt assembly into the shell; when the inner handle rotates towards the other side, the first unlocking boss abuts against the shifting block to push the middle shifting peach to rotate towards the side, the unlocking baffle is located on the motion track of the spring bolt assembly, the limiting baffle moves to the limiting groove, at the moment, the locking piece slides towards one side of the outer shifting peach under the action of the locking spring, and the stopping part is located on the periphery of the outer shifting peach.

2. The door lock of claim 1,

the spring bolt subassembly includes spring bolt and spring bolt drive frame, spring bolt drive frame slides and sets up in the casing, the one end of spring bolt drive frame is equipped with the butt and is in keeping away from of first unblock boss and second unblock boss the unblock ka tai of the side of spring bolt.

3. The door lock of claim 2,

the spring bolt with the drive frame is connected with rotating.

4. The door lock of claim 1,

the other end of the locking piece is provided with a rotating shaft;

still be provided with the locking plate base in the casing, be provided with the holding on the locking plate base the vertical shaft groove of rotation axis.

5. The door lock of claim 4,

the upper end and the lower end of the locking piece base are arranged on the sliding track of the lock tongue assembly and used for limiting the sliding distance of the lock tongue assembly to the shell.

6. The door lock of claim 4,

the locking piece base is provided with a mounting hole for the locking spring to pass through;

after the locking spring penetrates through the mounting hole, two ends of the locking spring are respectively abutted against the locking sheet and the shell.

7. The door lock according to any one of claims 1 to 6, further comprising:

the emergency unlocking structure is arranged on the outer handle and is rotationally connected with the middle shifting peach.

8. The door lock of claim 7,

the emergency unlocking structure is a rod piece, the inner end of the rod piece is inserted into the center of the middle shifting peach, the outer end of the rod piece is rotatably arranged at the center of the outer handle, and an oval or polygonal groove is formed in the outer end face of the rod piece.

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