Door lock and door body using the same

Abstract

The present invention discloses a door lock and a door body, wherein the door lock comprises a shell, in which a first locking mechanism, a second locking mechanism and a third locking mechanism are installed, the first locking mechanism comprises a first locking tongue and a first driving component driving the first locking tongue to telescopically move, the second locking mechanism comprises a second locking tongue and a second driving component driving the second locking tongue to telescopically move, and the third locking mechanism comprises a third locking tongue and a third driving component driving the third locking tongue to telescopically move; when a fourth swing arm drives the third locking tongue to extend for locking, the third locking tongue drives the second transmission member to move, so that the first transmission member and the third swing arm can be disengaged from the linkage, and when the fourth swing arm drives the third locking tongue to retract for unlocking, the third locking tongue can drive the second transmission member to reset, so that the first transmission member and the third swing arm can resume the linkage, the structure design is reasonable, the anti-theft performance is high, the switch lock operation is convenient, the installation is flexible and convenient, the application range is wider, and it is more reliable and practical.

Description

Technical Field

[0001] The present invention relates to the technical field of locks, and in particular to a door lock and a door body using the door lock. Background Art

[0002] Door locks are usually installed on doors, and the door locks are locked by a lock tongue. In the related art, door locks have a single lock tongue, which is simple in structure and poor in anti-theft effect; some door locks have two or more lock tongues, each of which works independently, and the structure is too complicated, the door lock opening and closing operation is cumbersome, the flexibility is poor, and it is inconvenient to use. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a door lock that enables linkage between the lock tongues, is easy to operate, has a reasonable structural design, and is more practical and reliable.

[0004] The present invention also provides a door body using the door lock.

[0005] A door lock according to an embodiment of the first aspect of the present invention comprises:

[0006] A first locking mechanism, the first locking mechanism comprising a first locking tongue and a first driving assembly for driving the first locking tongue to telescopically move;

[0007] A second locking mechanism, the second locking mechanism comprising a second locking tongue and a second driving assembly for driving the second locking tongue to telescopically move;

[0008] A third locking mechanism, the third locking mechanism comprising a third locking tongue and a third driving assembly for driving the third locking tongue to telescopically move;

[0009] Among them, the first driving assembly includes a first rotating member, the first rotating member is provided with a first swing arm for moving the first locking tongue and a second swing arm for linking with the second driving assembly and the third driving assembly; the second driving assembly includes a second rotating member, the second rotating member is provided with a third swing arm for moving the second locking tongue, and the second swing arm is linked with the second rotating member through a first transmission member; the third driving assembly includes a third rotating member, the third rotating member is provided with a fourth swing arm for moving the third locking tongue, the first transmission member is linked with the third locking tongue through the second transmission member, so that when the fourth swing arm moves the third locking tongue to extend for locking, the first transmission member and the third swing arm can be disengaged from the linkage, and when the fourth swing arm moves the third locking tongue to retract, the first transmission member and the third swing arm can resume the linkage.

[0010] The door lock according to the embodiment of the present invention has at least the following beneficial effects:

[0011] The door lock is provided with a first locking tongue, a second locking tongue and a third locking tongue. The first swing arm of the first rotating member is used to drive the first locking tongue to extend and retract, the third swing arm of the second rotating member is used to drive the second locking tongue to extend and retract, and the fourth swing arm of the third rotating member is used to drive the third locking tongue to extend and retract, so as to realize that the first locking tongue, the second locking tongue and the third locking tongue can extend and retract to unlock and lock the door. Among them, the second swing arm of the first rotating member is linked with the second rotating member through the first transmission member, and when the first rotating member drives the first locking tongue to retract and unlock, the second locking tongue can be linked to retract simultaneously to unlock. At the same time, the first transmission member is linked with the third locking tongue through the second transmission member. In this way, when the fourth swing arm drives the third locking tongue to extend for locking, the third locking tongue drives the second transmission member to move, so that the first transmission member and the third swing arm can be disengaged from linkage, that is, after the third locking tongue is locked, the first rotating member cannot link to open the second locking tongue, and when the fourth swing arm drives the third locking tongue to retract for unlocking, the third locking tongue can drive the second transmission member to reset, so that the first transmission member and the third swing arm are restored to linkage. After the third locking tongue retracts and unlocks, the second locking tongue and the first locking tongue can also be linked to retract, so as to achieve the purpose of unlocking. The structure is reasonably designed, with high anti-theft performance, convenient operation of locking and unlocking, and the door lock structure is compact, which is beneficial to reducing the volume of the lock body, flexible and convenient to install, has a wider application range, and is more reliable and practical.

[0012] The first driving component includes a first rotating member, the first rotating member is provided with a first swing arm for driving the first locking tongue and a second swing arm for linking with the second driving component and the third driving component; the second driving component includes a second rotating member, the second rotating member is provided with a third swing arm for driving the second locking tongue, and the second swing arm is linked with the second rotating member through the first transmission member; the third driving component includes a third rotating member, the third rotating member is provided with a fourth swing arm for driving the third locking tongue, and the first transmission member is linked with the third locking tongue through the second transmission member, so that when the fourth swing arm drives the third locking tongue to extend for locking, the first transmission member and the third swing arm can be disengaged from linkage, and when the fourth swing arm drives the third locking tongue to retract, the fourth swing arm can link the second transmission member to make the first transmission member and the third swing arm restored to linkage.

[0013] According to some embodiments of the present invention, the first rotating member includes a first rotating ring, a second rotating ring and a third rotating ring which are arranged side by side and coaxially. The second rotating ring is located between the first rotating ring and the third rotating ring. The first rotating ring, the second rotating ring and the third rotating ring are respectively provided with convex arms to cooperate to form the first swing arm, and the second swing arm is arranged on the second rotating ring.

[0014] According to some embodiments of the present invention, a first limit block is provided on the side of the first rotating ring, and a second limit block corresponding to the first limit block is provided on the second rotating ring. The first limit block cooperates with the second limit block so that the second rotating ring can rotate with the first rotating ring and move the first locking tongue.

[0015] According to some embodiments of the present invention, the first rotating ring and the third rotating ring are respectively provided in the middle thereof with connecting holes for connecting the handles.

[0016] According to some embodiments of the present invention, the first drive assembly also includes a fourth rotating member and a first torsion spring, the first torsion spring is connected to the fourth rotating member to provide an elastic force to the fourth rotating member, the fourth rotating member pushes the first swing arm to make the first lock tongue in a normally extended state, and the first lock tongue is a tilted tongue.

[0017] According to some embodiments of the present invention, the second drive assembly also includes a fifth rotating member, and the fifth rotating member is provided with a fifth swing arm for driving the third swing arm to rotate, so that the third swing arm drives the second lock tongue to contract, and the first transmission member is provided with a matching portion matching the fifth swing arm to drive the fifth swing arm to swing.

[0018] According to some embodiments of the present invention, the door lock also includes a shell, the third drive assembly also includes a locking block, the third lock tongue is provided with a first slide groove matching the locking block and extending in a direction perpendicular to the movement direction of the third lock tongue, the shell is provided with a first card slot and a second card slot distributed along the movement direction of the third lock tongue, and the first slide groove is provided with a spring for pushing the locking block to move, so that when the fourth swing arm moves the third lock tongue to retract, the fourth swing arm pushes the locking block to be clamped in the first card slot, and when the fourth swing arm moves the third lock tongue to extend, the fourth swing arm pushes the locking block to be clamped in the second card slot.

[0019] According to some embodiments of the present invention, the third lock tongue is provided with a second slide groove matching the second transmission member, one end of the second transmission member is connected to the first transmission member, and the other end extends to a position corresponding to the fourth swing arm, and when the fourth swing arm swings, it can link with the second transmission member so that the first transmission member pushes the third swing arm to move the second lock tongue to retract.

[0020] According to some embodiments of the present invention, the door lock further comprises a lock core, and the third rotating member is connected to the lock core so that the lock core drives the third rotating member to rotate.

[0021] According to the door body of the embodiment of the first aspect of the present invention, the door lock of the embodiment of the first aspect mentioned above is installed on the door body.

[0022] The door body according to the embodiment of the present invention has at least the following beneficial effects:

[0023] When the door body uses the above-mentioned door lock for unlocking and locking, the structure design is reasonable, the anti-theft performance is high, the operation of unlocking and locking is convenient, and the door lock structure is compact, the volume of the lock body is small, which is beneficial to saving the installation space, the installation is more flexible and convenient, and it can be applied to the door body with a smaller size, and the application range is wider.

[0024] Additional aspects and advantages of the invention will be given in part in the following description, will become apparent in part from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the drawings and embodiments, where:

[0026] Figure 1 is a schematic diagram of the first lock tongue protruding state of the door lock according to an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the state where the first lock tongue and the second lock tongue of the door lock according to an embodiment of the present invention protrude simultaneously;

[0028] Figure 3 is a schematic diagram of the state where the first lock tongue, the second lock tongue and the third lock tongue of the door lock according to an embodiment of the present invention protrude simultaneously;

[0029] Figure 4 is an exploded structure schematic diagram of the door lock according to an embodiment of the present invention;

[0030] Figure 5 is an internal three-dimensional structure schematic diagram of the door lock according to an embodiment of the present invention;

[0031] Figure 6 is a connection structure schematic diagram of the first driving component and the first lock tongue in the door lock according to an embodiment of the present invention;

[0032] Figure 7 is a schematic diagram of the structure of the third lock tongue in the door lock according to an embodiment of the present invention;

[0033] Figure 8 is a schematic diagram of the structure of the bottom case in the door lock according to an embodiment of the present invention;

[0034] Figure 9 is Figure 8 an enlarged structure schematic diagram at A in

[0035] Reference numerals:

[0036] Door lock 100, housing 110, panel 111, bottom housing 112, positioning column 1121, second torsion spring 1122, first card slot 1123, second card slot 1124, first lock tongue 120, baffle 121, guide slot 122, second lock tongue 130, third lock tongue 140, first slide slot 141, second slide slot 142, first spring 143, locking block 144, card block 1441, cover plate 145, first rotating member 150, first swing arm 151, second swing arm 152, first rotating ring 1510, first protruding arm 1511, first limit block 1512, The first connecting hole 1513, the second rotating ring 1520, the second protruding arm 1521, the second limiting block 1522, the third rotating ring 1530, the third protruding arm 1531, the second connecting hole 1532, the fourth rotating member 1540, the first torsion spring 1550, the second rotating member 160, the third swing arm 161, the third connecting hole 162, the fifth rotating member 163, the fifth swing arm 1631, the third rotating member 170, the fourth swing arm 171, the first transmission member 180, the matching part 181, the second transmission member 190, the toggle end 191, the limiting groove 192, and the second spring 193. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it is necessary to understand that descriptions involving orientation, such as up, down, left, right, etc., the orientations or positional relationships indicated are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In the description of the present invention, if there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] Reference below Figures 1 to 9The door lock 100 according to the embodiments of the present invention is applicable to be installed on a door body, for example, a room door, an office door, a security door, etc.

[0042] See Figures 1 to 3 As shown, the door lock 100 according to the embodiments of the present invention includes a housing 110. A first locking mechanism, a second locking mechanism, and a third locking mechanism are installed inside the housing 110. The first locking mechanism includes a first locking tongue 120 and a first driving component. The second locking mechanism includes a second locking tongue 130 and a second driving component. The third locking mechanism includes a third locking tongue 140 and a third driving component. Through holes corresponding to the first locking tongue 120, the second locking tongue 130, and the third locking tongue 140 are provided on the housing 110. The first driving component can drive the first locking tongue 120 to move telescopically through the through hole. The second driving component can drive the second locking tongue 130 to move telescopically through the through hole. The third driving component can drive the third locking tongue 140 to move telescopically through the through hole, so that the three locking tongues cooperate to perform locking and unlocking.

[0043] Among them, the first driving component includes a first rotating member 150. The first rotating member 150 is rotatably connected to the inner side of the housing 110. The first rotating member 150 is provided with a first swing arm 151 and a second swing arm 152. The first swing arm 151 is used to toggle the first locking tongue 120 so that the first locking tongue 120 can extend or retract. In the embodiment, the first locking tongue 120 is an inclined tongue. In the normal state, the inclined tongue is in the extended state. As Figure 1 shown, that is, when the first swing arm 151 does not toggle the first locking tongue 120, the first locking tongue 120 is in the locked state. When the second locking tongue 130 and the third locking tongue 140 are in the retracted state, by rotating the first rotating member 150 to swing the first swing arm 151, the first locking tongue 120 is toggled to retract into the through hole, achieving the purpose of unlocking. The first rotating member 150 can be connected to a handle. The handle drives the first rotating member 150 to rotate, facilitating the operation of opening the door lock 100. The structure of the handle is not shown in the drawings.

[0044] See Figures 1 to 3 As shown, in some embodiments, the second driving component includes a second rotating member 160. The second rotating member 160 is provided with a third swing arm 161. The third swing arm 161 is used to toggle the second locking tongue 130 so that the second locking tongue 130 can extend or retract. Specifically, the second locking tongue 130 is located below the first locking tongue 120. The second locking tongue 130 is a square locking tongue. The second rotating member 160 is rotatably connected to the inner side of the housing 110. When the second rotating member 160 rotates, it can drive the third swing arm 161 to swing. When the third swing arm 161 swings counterclockwise, it can toggle the second locking tongue 130 to extend outwards. When the third swing arm 161 swings clockwise, it can toggle the second locking tongue 130 to retract inwards, thereby realizing the telescopic driving of the second locking tongue 130. Figure 2The figure shows a schematic diagram of the state where the first locking tongue 120 and the second locking tongue 130 extend simultaneously.

[0045] See Figures 1 to 3 As shown, the second swing arm 152 is linked with the second rotating member 160 through the first transmission member 180, so that the second rotating member 160 can be driven to rotate when the first rotating member 150 rotates. In the embodiment, when the second locking tongue 130 is in the extended locking state, when the first rotating member 150 is driven to rotate by the handle, the first rotating member 150 and the second rotating member 160 are linked, so that the second rotating member 160 rotates simultaneously and toggles the second locking tongue 130 to retract. In this way, the second locking tongue 130 can be opened while the first locking tongue 120 is opened, thus realizing unlocking. For example, one end of the first transmission member 180 is connected to the second swing arm 152, and the other end of the first transmission member 180 is connected to the second rotating member 160, enabling the first rotating member 150 and the second rotating member 160 to be linked. It can be understood that the second rotating member 160 can be operated through a separate handle to make the second locking tongue 130 extend for locking.

[0046] See Figures 1 to 3 As shown, the third driving assembly includes a third rotating member 170. The third rotating member 170 is provided with a fourth swing arm 171, and the fourth swing arm 171 is used to toggle the third locking tongue 140 so that the third locking tongue 140 can extend or retract. Among them, the third locking tongue 140 is located below the second locking tongue 130, and the third locking tongue 140 is also a square locking tongue. When the third rotating member 170 rotates, it can drive the fourth swing arm 171 to swing. When the fourth swing arm 171 swings counterclockwise, it can toggle the third locking tongue 140 to extend outwards. When the fourth swing arm 171 swings clockwise, it can toggle the third locking tongue 140 to retract inwards, thereby realizing driving the third locking tongue 140 to expand and contract. Figure 3 The figure shows a schematic diagram of the state where the first locking tongue 120, the second locking tongue 130, and the third locking tongue 140 extend simultaneously.

[0047] Specifically, the first transmission member 180 is linked with the second rotating member 160, and the first transmission member 180 is connected to a second transmission member 190. The second transmission member 190 is linked with the third locking tongue 140. When the third locking tongue 140 moves, it can drive the second transmission member 190 to move, and further cause the first transmission member 180 to move following the second transmission member 190. In the embodiment, when the fourth swing arm 171 toggles the third locking tongue 140 to extend for locking, the third locking tongue 140 drives the second transmission member 190 to move. At this time, the first transmission member 180 deviates from the second rotating member 160, so that the first transmission member 180 and the third swing arm 161 can be disengaged from the linkage, that is, the first rotating member 150 cannot drive the second locking tongue 130 to open after the third locking tongue 140 is locked. When the fourth swing arm 171 toggles the third locking tongue 140 to retract for unlocking, the third locking tongue 140 can drive the second transmission member 190 to reset, so that the first transmission member 180 and the third swing arm 161 resume the linkage. In this way, after the third locking tongue 140 retracts for unlocking, the second locking tongue 130 and the first locking tongue 120 can also be driven to retract in linkage, so as to achieve the purpose of unlocking. The structure is reasonably designed, with high anti-theft performance and convenient operation of locking and unlocking. The first driving assembly, the second driving assembly and the third driving assembly of the door lock 100 are linked through the first transmission member 180 and the second transmission member 190 to realize the linked unlocking of the three locking tongues. The structure is reasonably designed and more compact, which is beneficial to reducing the volume of the lock body, improving the flexibility of installing the door lock 100, having a wider application range, and being more reliable and practical.

[0048] See Figure 4 and Figure 5As shown, in some embodiments, the first rotating member 150 includes a first rotating ring 1510, a second rotating ring 1520 and a third rotating ring 1530, and the first rotating ring 1510, the second rotating ring 1520 and the third rotating ring 1530 are arranged side by side and coaxially. Coaxiality can be understood as the central axes of the three rotating rings overlap, and the three rotating rings can be superimposed together, wherein the second rotating ring 1520 is located between the first rotating ring 1510 and the third rotating ring 1530, and the first rotating ring 1510, the second rotating ring 1520 and the third rotating ring 1530 are arranged side by side and coaxially. The side of 510 protrudes outward to form a first protrusion 1511, the side of the second rotating ring 1520 protrudes outward to form a second protrusion 1521 and a second swing arm 152, the side of the third rotating ring 1530 protrudes outward to form a third protrusion 1531, the first protrusion 1511, the second protrusion 1521 and the third protrusion 1531 are arranged side by side to form a first swing arm 151, and the first locking tongue 120 is provided with a baffle 121 extending along the inner side of the shell 110 to form a corresponding to the first swing arm 151. It can be understood that the first rotating ring 1510, the second rotating ring 1520 and the third rotating ring 1530 can be connected by a handle so that the three rotating rings can rotate together; the first rotating ring 1510, the second rotating ring 1520 and the third rotating ring 1530 can also rotate separately, and each rotating ring can be driven by the corresponding convex arm to move the baffle 121 when rotating separately, and the baffle 121 drives the first lock tongue 120 to move. For example, the first rotating ring 1510 faces the inner side of the door body and is connected to a handle, and the third rotating ring 1530 faces the outer side of the door body and is connected to another handle. In this way, the first rotating ring 1510 and the third rotating ring 1530 can be operated by different handles, that is, the first lock tongue 120 can be opened and unlocked on both the outer side and the inner side of the door body, which is flexible and convenient to use. It should be noted that, taking the door body of a room as an example, the inner side of the door body refers to the inner side of the room, and the outer side of the door body refers to the outer side of the room.

[0049] A first connection hole 1513 connected to the handle is provided in the middle of the first rotating ring 1510, and a second connection hole 1532 connected to the handle is provided in the middle of the third rotating ring 1530. Both the first connection hole 1513 and the second connection hole 1532 are square holes, which are convenient for positioning with the handle. Of course, the first connection hole 1513 and the second connection hole 1532 are not limited to square, and can also be triangular, hexagonal, etc.

[0050] See also Figure 4 and Figure 6As shown, in some embodiments, a first limiting block 1512 is provided on the side of the first rotating ring 1510, and a second limiting block 1522 corresponding to the first limiting block 1512 is provided on the side of the second rotating ring 1520. When the first rotating ring 1510 and the second rotating ring 1520 are arranged side by side, the cooperation between the first limiting block 1512 and the second limiting block 1522 can play a limiting role. When the first rotating ring 1510 rotates, the second rotating ring 1520 can rotate together with the first rotating ring 1510, thereby driving the first locking tongue 120 to move. It should be noted that in the embodiment, the second rotating ring 1520 can only rotate together with the first rotating ring 1510 and cannot drive the second rotating ring 1520 to rotate when the third rotating ring 1530 rotates. It can be understood that the second rotating ring 1520 is linked with the second rotating member 160. When the second locking tongue 130 extends to lock, the first rotating ring 1510 can be driven to rotate by the handle on the inner side of the door body, and then drive the second rotating ring 1520 to rotate and link with the second rotating member 160, so that the third swing arm 161 can drive the second locking tongue 130 to retract, thereby opening the first locking tongue 120 and the second locking tongue 130. The handle on the outer side of the door body cannot open the second locking tongue 130, that is, when the second locking tongue 130 is locked, the door lock 100 can only be opened from the inner side of the door body. The structural design is reasonable, the anti-theft performance is high, and it is more practical and reliable.

[0051] See Figure 6 As shown, in some embodiments, the first driving assembly further includes a fourth rotating member 1540 and a first torsion spring 1550. The fourth rotating member 1540 is rotatably connected to the inner side of the housing 110, and the first torsion spring 1550 is connected to the fourth rotating member 1540. The first torsion spring 1550 can provide an elastic force to the fourth rotating member 1540. Under the action of the elastic force, the fourth rotating member 1540 can push the first swing arm 151 so that the first swing arm 151 does not drive the first locking tongue 120, and at this time the locking tongue is in the extended state. Specifically, a stop block corresponding to the fourth rotating member 1540 is provided on the first rotating member 150, and the fourth rotating member 1540 cooperates with the stop block to limit the swing of the first swing arm 151. When the handle drives the first rotating member 150 to rotate, the first rotating member 150 can rotate against the action force of the fourth rotating member 1540, so that the first swing arm 151 drives the first locking tongue 120. After the handle is released, the fourth rotating member 1540 pushes the first swing arm 151 to reset. The structure is stable and reliable. The reset structure with the cooperation of the first torsion spring 1550 and the fourth rotating member 1540 saves more installation space, the structure is more compact, and is beneficial to reducing the volume of the housing 110.

[0052] See Figure 5 and Figure 6As shown, a positioning post 1121 is provided inside the housing 110, and a guiding groove 122 matching the positioning post 1121 is provided on the first locking tongue 120. Through the cooperation of the positioning post 1121 and the guiding groove 122, the first locking tongue 120 can be positioned, ensuring the stability during the moving process and higher reliability. At the same time, the positioning post 1121 can limit the first swing arm 151, and the positioning post 1121 cooperates with the fourth rotating member 1540 to limit the first swing arm 151 in the initial position. In addition, a second torsion spring 1122 is also provided inside the housing 110. Through the second torsion spring 1122, an elastic acting force can be provided to the first locking tongue 120, enabling the first locking tongue 120 to maintain the extended state.

[0053] See Figure 5 As shown, in some embodiments, the second driving assembly further includes a fifth rotating member 163. The fifth rotating member 163 is provided with a fifth swing arm 1631. When the fifth rotating member 163 rotates, it can push the third swing arm 161 to rotate through the fifth swing arm 1631, so that the third swing arm 161 toggles the second locking tongue 130 to retract. Among them, a matching portion 181 matching the fifth swing arm 1631 is provided on the first transmission member 180. When the first rotating member 150 drives the first transmission member 180 in linkage, the first transmission member 180 pushes the fifth swing arm 1631 to swing through the matching portion 181. Specifically, the fifth rotating member 163 is rotatably connected inside the housing 110. A fifth swing arm 1631 extends outward from the side of the fifth rotating member 163. The fifth swing arm 1631 is arc-shaped. The first transmission member 180 is a first transmission rod, and the matching portion 181 is an arc-shaped concave surface formed on the first transmission rod. This concave surface matches the fifth swing arm 1631. During linkage, the concave surface and the fifth swing arm 1631 can abut against each other, and the end of the fifth swing arm 1631 abuts against the third swing arm 161. As Figure 5 shown, when the first rotating member 150 rotates clockwise, it drives the first transmission rod to move upward. The first transmission rod pushes the fifth swing arm 1631 to rotate clockwise, so that the fifth swing arm 1631 pushes the third swing arm 161 to rotate clockwise, thereby toggling the second locking tongue 130 to retract for unlocking.

[0054] It can be understood that when the second locking tongue 130 is locked, the door lock 100 can only be opened from the inner side of the door body. A separate handle is used to operate from the inner side of the door body for locking, so that the second rotating member 160 rotates counterclockwise, and then the second locking tongue 130 is toggled to extend for locking through the third swing arm 161. Among them, a third connection hole 162 for connecting the locking handle is provided on the second rotating member 160, and the third connection hole 162 is square.

[0055] See Figure 4 、 Figure 8 and Figure 9As shown, in some embodiments, the third driving component further includes a locking block 144. A first sliding groove 141 is provided on the third locking tongue 140. The first sliding groove 141 is located on the side wall of the third locking tongue 140 and extends perpendicular to the moving direction of the third locking tongue 140, that is, the first sliding groove 141 extends from the upper side surface to the lower side surface of the third locking tongue 140. The locking block 144 is installed in the first sliding groove 141 and can move along the first sliding groove 141. A first spring 143 is provided in the first sliding groove 141, and the first spring 143 is used to generate a downward elastic force on the locking block 144. At the same time, a first card slot 1123 and a second card slot 1124 are provided on the housing 110. The first card slot 1123 and the second card slot 1124 are distributed along the moving direction of the third locking tongue 140. Specifically, the housing 110 includes a bottom case 112 and a panel 111. The first card slot 1123 and the second card slot 1124 are located on the bottom case 112. When the third locking tongue 140 expands and contracts, it can drive the locking block 144 to move back and forth between the first card slot 1123 and the second card slot 1124. The upper end of the locking block 144 extends towards the bottom case 112 to form a card block 1441 that matches the first card slot 1123 and the second card slot 1124.

[0056] It can be understood that the third rotating member 170 is located below the third locking tongue 140. When the third locking tongue 140 is in a contracted state, the card block 1441 of the locking block 144 is clamped in the first card slot 1123. When the third rotating member 170 rotates counterclockwise, it drives the fourth swing arm 171 to swing. The fourth swing arm 171 pushes the locking block 144 to move upward along the first sliding groove 141 from below, so that the locking block 144 disengages from the first card slot 1123, and at the same time the third locking tongue 140 extends outwards; when the third locking tongue 140 moves outwards, the locking block 144 moves to the position of the second card slot 1124. At this time, the fourth swing arm 171 is away from the locking block 144, and the locking block 144 is reset downward under the action of the elastic force, so that the card block 1441 of the locking block 144 is clamped in the second card slot 1124, realizing the locking of the third locking tongue 140. The structure is stable and reliable, and the anti-theft performance is strong.

[0057] In the embodiment, a lock core is installed in the door lock 100. The lock core is connected to the third rotating member 170. The third rotating member 170 can be driven to rotate through the lock core. It can be understood that the lock core needs a corresponding key to be opened, and the lock core can open the third locking tongue 140 with a key both on the outer side and the inner side of the door body. Among them, the fourth swing arm 171 is a dial block formed by the side of the third rotating member 170 protruding outwards. A slot corresponding to the dial block is provided at the position of the third locking tongue 140 where the locking block 144 is located, which is convenient for the dial block to abut against the locking block 144.

[0058] See Figure 4 and Figure 5As shown, in some embodiments, the third lock tongue 140 is provided with a second slide groove 142 matching the second transmission member 190, and the second transmission member 190 is a second transmission rod, one end of the second transmission rod is connected to the first transmission rod, and the other end is inserted into the second slide groove 142 and extends downward through the third lock tongue 140 to form a toggle end 191, and the toggle end 191 corresponds to the third rotating member 170. When the third lock tongue 140 is extended, the second transmission rod moves with the third lock tongue 140 and away from the fourth swing arm 171. At this time, the fourth swing arm 171 cannot be linked with the second transmission rod, and the first transmission rod is disengaged from the fifth swing arm 1631. When the third lock tongue 140 retracts, the first transmission rod and the fifth swing arm 1631 resume linkage. At this time, the fourth swing arm 171 can contact the toggle end 191 when rotating clockwise, and the second transmission rod is moved upward by pushing the toggle end 191, thereby driving the first transmission rod to move upward, so that the fifth swing arm 1631 pushes the third swing arm 161 to rotate clockwise, thereby toggling the second lock tongue 130 to retract for unlocking. In addition, a limiting groove 192 is provided on the second transmission rod, and a second spring 193 is provided in the limiting groove 192. At the same time, a cover plate 145 is provided on the second slide groove 142, and the cover plate 145 is fixedly connected to the third locking tongue 140. A positioning block extending toward the limiting groove 192 is provided on the cover plate 145. One end of the second spring 193 abuts against the positioning block, and the other end abuts against the inner wall of the limiting groove 192. It can be understood that after the fourth swing arm 171 pushes the second transmission rod to move upward, the second transmission rod will reset downward under the elastic force of the second spring 193.

[0059] In the embodiment, when the first lock tongue 120, the second lock tongue 130 and the third lock tongue 140 are all in a locked state, after the third lock tongue 140 is opened by the lock core, the second lock tongue 130 can be further opened, and finally the first lock tongue 120 is opened by the handle to achieve the purpose of unlocking. The door lock 100 has strong anti-theft performance and is flexible and convenient to use.

[0060] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A door lock, It is characterized in that include: a first locking mechanism, the first locking mechanism comprising a first locking tongue and a first driving assembly; a second locking mechanism, the second locking mechanism comprising a second locking tongue and a second driving assembly; A third locking mechanism, the third locking mechanism comprising a third locking tongue and a third driving assembly; Wherein, the first driving assembly includes a first rotating member, the first rotating member is provided with a first swing arm for shifting the first locking tongue and a second swing arm for linking with the second driving assembly and the third driving assembly; the second driving assembly includes a second rotating member, the second rotating member is provided with a third swing arm for shifting the second locking tongue, the second swing arm is linked with the second rotating member through a first transmission member; the third driving assembly includes a third rotating member, the third rotating member is provided with a fourth swing arm for shifting the third locking tongue, the first transmission member is linked with the third locking tongue through a second transmission member, when the fourth swing arm shifts the third locking tongue to extend for locking, the first transmission member and the third swing arm can be disengaged from the linkage, and when the fourth swing arm shifts the third locking tongue to retract, the first transmission member and the third swing arm can resume the linkage; The door lock further includes a housing, the third driving assembly further includes a locking block, the third locking tongue is provided with a first sliding groove matching the locking block and extending in a direction perpendicular to the moving direction of the third locking tongue, the housing is provided with a first clamping groove and a second clamping groove distributed in the moving direction of the third locking tongue, a spring for pushing the locking block to move is provided in the first sliding groove, when the fourth swing arm moves the third locking tongue to retract, the fourth swing arm pushes the locking block to be clamped in the first clamping groove, and when the fourth swing arm moves the third locking tongue to extend, the fourth swing arm pushes the locking block to be clamped in the second clamping groove; The third locking tongue is provided with a second sliding groove matching the second transmission member. One end of the second transmission member is connected to the first transmission member, and the other end extends to a position corresponding to the fourth swing arm. When the fourth swing arm swings, it can link with the second transmission member so that the first transmission member pushes the third swing arm to move the second locking tongue to retract.

2. A door lock according to claim 1, It is characterized in that The first rotating member includes a first rotating ring, a second rotating ring and a third rotating ring which are arranged side by side and coaxially, the second rotating ring is located between the first rotating ring and the third rotating ring, the first rotating ring, the second rotating ring and the third rotating ring are respectively provided with protruding arms to cooperate to form the first swing arm, and the second swing arm is arranged on the second rotating ring.

3. A door lock according to claim 2, It is characterized in that A first limit block is provided on the side of the first rotating ring, and a second limit block corresponding to the first limit block is provided on the second rotating ring. The first limit block cooperates with the second limit block so that the second rotating ring can rotate with the first rotating ring and move the first locking tongue.

4. A door lock according to claim 2, It is characterized in that A connection hole for connecting a handle is respectively provided in the middle of the first rotating ring and the third rotating ring.

5. A door lock according to any one of claims 1 to 4, characterized in that the first driving assembly further includes a fourth rotating member and a first torsion spring, the first torsion spring is connected to the fourth rotating member to provide an elastic acting force on the fourth rotating member, the fourth rotating member pushes the first swing arm so that the first locking tongue is in a normally extended state, and the first locking tongue is an inclined tongue.

6. A door lock according to claim 1, characterized in that the second driving assembly further includes a fifth rotating member, the fifth rotating member is provided with a fifth swing arm for pushing the third swing arm to rotate, so that the third swing arm toggles the second locking tongue to contract, and the first transmission member is provided with a matching portion for matching with the fifth swing arm to push the fifth swing arm to swing.

7. A door lock according to claim 1, characterized in that the door lock further includes a lock core, the third rotating member is connected to the lock core, and the third rotating member is driven to rotate by the lock core.

8. A door body, characterized in that the door body is equipped with the door lock according to any one of claims 1 to 7 above.

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