阅读说明：本技术 一种副锁装置 (Auxiliary lock device ) 是由 刘庭权 于 2021-08-13 设计创作，主要内容包括：本发明属于门窗制造领域,具体涉及一种副锁装置,包括:锁壳,转动件,上挂钩,下挂钩,传动组件,保险离合组件。传动组件包括滑移件Ⅰ、滑移件Ⅱ、传动件Ⅰ、传动件Ⅱ,连接件；保险离合组件包括锁舌、保险件、离合件Ⅰ、离合件Ⅱ。有益效果：本发明在两扇门关闭状态下,由于离合件Ⅰ无法挂住滑移件Ⅱ,转动件驱动滑移件Ⅰ移动,带动离合件Ⅰ进行移动；只有转动件、滑移件Ⅰ、离合件Ⅰ移动,滑移件Ⅱ不动,使得上挂钩、下挂钩都不移动,实现了副锁装置的空转保护,防止了暴力开门对副锁装置的破坏,保证了副锁装置的使用寿命。(The invention belongs to the field of door and window manufacturing, and particularly relates to an auxiliary lock device which comprises a lock shell, a rotating part, an upper hook, a lower hook, a transmission assembly and a safety clutch assembly. The transmission assembly comprises a sliding piece I, a sliding piece II, a transmission piece I, a transmission piece II and a connecting piece; the safety clutch assembly comprises a lock tongue, a safety piece, a clutch piece I and a clutch piece II. Has the advantages that: in the invention, under the state that the two doors are closed, the clutch piece I can not be hung on the sliding piece II, and the rotating piece drives the sliding piece I to move so as to drive the clutch piece I to move; only rotate piece, sliding part I, separation and reunion piece I and remove, sliding part II is motionless for go up the couple, couple down all unmovable, realized the idle running protection of vice locking device, prevented that the violence from opening the door to the destruction of vice locking device, guaranteed the life of vice locking device.)

1. A secondary lock device, comprising:

a lock case (1);

the rotating piece (2) is arranged on the lock shell (1);

the upper hook (3) is arranged on the lock shell (1) and can move along the lock shell (1); the bolt is connected with the bolt on the auxiliary lock door and is used for controlling the opening and closing of the upper lock on the auxiliary lock door;

the lower hook (4) is arranged on the lock shell (1) and can move along the lock shell (1); the bolt is connected with the bolt on the auxiliary lock door and is used for controlling the opening and closing of the ground lock on the auxiliary lock door;

the transmission assembly comprises a sliding piece I (501), a sliding piece II (502), a transmission piece I (503), a transmission piece II (504) and a connecting piece (505); the connecting piece (505) is arranged on the sliding piece I (501); the sliding piece I (501) can move on the lock shell (1); the connecting piece (505) can move relatively on the upper hook (3) and the sliding piece II (502); the sliding piece II (502) is arranged between the upper hook (3) and the sliding piece I (501); the sliding piece II (502) is connected with the lower hook (4), and the sliding piece II (502) and the lower hook (4) can move relatively;

the rotating part (2) is connected with the sliding part I (501), and the rotating part (2) can drive the sliding part I (501) to move;

the transmission piece I (503) and the transmission piece II (504) are arranged on the lock shell (1); the transmission piece I (503) is respectively connected with the transmission piece II (504) and the upper hook (3); the transmission piece II (504) is connected with the sliding piece II (502);

the safety clutch assembly is arranged on the lock shell (1) and is used for controlling the movement of the upper hook (3) and the lower hook (4); the insurance clutch component comprises a lock tongue (601), an insurance part (602), a clutch part I (604) and a clutch part II (605).

2. A secondary locking device according to claim 1, characterised in that the safety clutch assembly is further provided with a carrier (603); the clutch piece I (604) is arranged on the connecting piece (505) and can swing relative to the connecting piece (505); the clutch piece II (605) and the bracket (603) are arranged on the lock shell (1); the clutch piece II (605) can swing on the lock shell (1); the safety piece (602) is arranged on the bracket (603) and is connected with the bolt (601); the movement of the lock tongue (601) drives the safety piece (602) to move on the bracket (603); the safety piece (602) is used for pushing the clutch piece I (604) and the clutch piece II (605) to swing.

3. A secondary locking device according to claim 1, wherein the coupling of the clutch member i (604) to the sliding member ii (502) is in two conditions: when the clutch piece I (604) and the sliding piece II (502) are in a connected state, the sliding piece I (501) drives the clutch piece I (604) to move, and can drive the sliding piece II (502) and the lower hook (4) to move together; when the clutch I (604) and the sliding part II (502) are in an unconnected state, the sliding part I (501) and the sliding part II (502) can move relatively, namely the lower hook (4) is fixed and the sliding part II (502) is fixed, the sliding part I (501) moves and the clutch I (604) moves, namely the lower hook (4) is fixed and the sliding part II (502) is fixed, and the sliding part I (501) moves and the clutch I (604) moves.

4. A secondary locking device according to claim 1, characterised in that the clutch member ii (605) is in hooking connection with the lower hook (4) for controlling the movement of the lower hook (4).

5. The secondary locking device according to claim 1, characterized in that the rotating member (2) is provided with teeth, the sliding member I (501) is provided with a rack, and the rotating member (2) and the sliding member I (501) are connected in a gear-rack meshing manner.

6. The secondary locking device according to claim 1, characterized in that the upper hook (3) and the sliding member II (502) are provided with racks; the transmission piece I (503) is meshed with the upper hook (3); the transmission piece I (503) is in meshing connection with the transmission piece II (504); the transmission piece II (504) is meshed with the sliding piece II (502).

7. A secondary lock device according to any one of claims 1-6, characterized in that a spring I (7) and a spring II (8) are provided, one end of the spring I (7) is connected with the lock shell (1) and the other end is connected with the connecting piece (505); one end of the spring II (8) is connected with the lock shell (1), and the other end of the spring II is connected with the upper hook (3).

8. A secondary lock arrangement according to any one of claims 1-6, characterised in that a spring III (9) is provided, said spring III (9) being connected at one end to the lock housing (1) and at the other end to said clutch member II (605).

9. A secondary locking device according to any one of claims 1 to 6, characterised in that a spring IV (10), a spring V (11) is provided; the spring IV (10) is used for resetting the clutch piece I (604), and the spring V (11) is used for resetting the lower hook (4).

10. A secondary locking device according to claim 1, wherein the transmission members i (503) and ii (504) are full gears or incomplete gears.

Technical Field

The invention belongs to the field of door and window manufacturing, and particularly relates to an auxiliary lock device.

Background

The split door on the market can be selected to open only one door or can be selected to open two doors simultaneously and is divided into a main lock door and an auxiliary lock door, a main lock is arranged on the main lock door, an auxiliary lock, a safety component matched with the main lock door, a top lock and a ground lock are arranged on the auxiliary lock door, and the auxiliary lock is connected with the top lock and the ground lock through a connecting rod (or a rope). When the split door needs to be closed, the lock tongues of the top lock and the ground lock are firstly retracted and then aligned with the bolt insertion holes on the door frame or the floor to be inserted, the auxiliary lock door is fixed, and then the main lock door is closed, so that the door can be opened or closed in or out of the door, and the two doors can be conveniently and quickly opened or closed; for example, the patent CN 105909082B discloses a top lock and a bottom lock which are controlled in a linkage manner. When two door of folio are in the state of closing the door locking, if meet unusual door opening mode, if the main lock door is not opened, violence is twisted round the handle of installing on vice lock door by force, because the blocking of insurance subassembly, the driving plate in the vice tool to lock is because of blockking unable shrink for swinging arms and driving plate atress by force, if the atress is too big, will cause the destruction to swinging arms, driving plate or insurance subassembly, make the life-span of vice lock very shorten.

Disclosure of Invention

The present invention has been made to overcome the above-mentioned drawbacks, and an object of the present invention is to provide a sub-lock device which can prevent damage to a sub-lock when a side-by-side door is closed and forcibly twisted to open the sub-lock by a force, and can prolong the life of the sub-lock.

The present invention provides such a secondary lock device, comprising:

a lock case;

the rotating piece is arranged on the lock shell;

the upper hook is arranged on the lock shell and can move along the lock shell; the bolt is connected with the bolt on the auxiliary lock door and is used for controlling the opening and closing of the upper lock on the auxiliary lock door;

the lower hook is arranged on the lock shell and can move along the lock shell; the bolt is connected with the bolt on the auxiliary lock door and is used for controlling the opening and closing of the ground lock on the auxiliary lock door;

the transmission assembly comprises a sliding piece I, a sliding piece II, a transmission piece I, a transmission piece II and a connecting piece; the connecting piece is arranged on the sliding piece I; the sliding piece I can move on the lock shell; the connecting piece can move relatively on the upper hook and the sliding piece II; the sliding part II is arranged between the upper hook and the sliding part I; the sliding piece II is connected with the lower hook, and the sliding piece II and the lower hook can move relatively;

the rotating piece is connected with the sliding piece I, and the sliding piece I can be driven to move by the rotation of the rotating piece;

the transmission piece I and the transmission piece II are arranged on the lock shell; the transmission piece I is connected with the transmission piece II and the upper hook respectively; the transmission piece II is connected with the sliding piece II;

and the safety clutch assembly is arranged on the lock shell and used for controlling the movement of the upper hook and the lower hook. The safety clutch assembly comprises a lock tongue, a safety piece, a clutch piece I and a clutch piece II; the clutch piece I is arranged on the connecting piece and can swing relative to the connecting piece.

In order to enhance the moving stability of the safety part, the safety clutch assembly is also provided with a bracket;

the clutch piece II and the bracket are arranged on the lock shell; the clutch piece II can swing on the lock shell; the safety piece is arranged on the bracket and is connected with the lock tongue; the movement of the lock tongue drives the safety piece to move on the bracket; the safety piece is used for pushing the clutch piece I and the clutch piece II to swing.

The connection of the clutch part I and the sliding part II has two conditions: when the clutch piece I and the sliding piece II are in a connected state, the sliding piece I drives the clutch piece I to move, and can drive the sliding piece II and the lower hook to move together; when the clutch member I and the sliding member II are not connected, the sliding member I and the sliding member II can move relatively, namely the lower hook is fixed, the sliding member II is fixed, the sliding member I moves, and the clutch member I moves.

The clutch piece II and the lower hook can form hook connection and is used for controlling the movement of the lower hook. When the clutch piece II is connected with the lower hook, the lower hook cannot extend out of the lock shell; when the clutch piece II and the lower hook are not connected, the lower hook can extend out of the lock shell.

When the spring bolt retracts towards the inside of the lock shell, the safety part moves to drive the clutch part I and the clutch part II to swing, so that the clutch part I and the sliding part II are in a disconnected state, and the clutch part II and the lower hook are in a disconnected state.

Preferably, be provided with the tooth on the rotation piece, be provided with the rack on the sliding part I, rotate the piece sliding part I connects through the rack and pinion meshing mode.

Preferably, the transmission piece I and the transmission piece II are gears or incomplete gears, and racks are arranged on the upper hook and the sliding piece II; the transmission piece I is meshed with the upper hook; the transmission piece I is meshed with the transmission piece II; and the transmission piece II is meshed and connected with the sliding piece II.

For the convenience of resetting after the sliding piece I moves, the device is provided with a spring I, one end of the spring I is connected with the lock shell, and the other end of the spring I is connected with the connecting piece.

In order to facilitate the resetting of the upper hook after moving, the device is provided with a spring II, one end of the spring II is connected with the lock shell, and the other end of the spring II is connected with the upper hook.

In order to facilitate the resetting of the clutch part II, the device is provided with a spring III, one end of the spring III is connected with the lock shell, and the other end of the spring III is connected with the clutch part II.

In order to facilitate the resetting of the clutch piece I and the lower hook after moving, the device is provided with a spring IV and a spring V, wherein the spring IV is used for resetting the clutch piece I, and the spring V is used for resetting the lower hook.

Preferably, the springs IV and V are torsion springs.

The invention has the beneficial effects that:

(1) in the invention, under the closing state of the two doors, the clutch piece I and the sliding piece II are controlled to be in the unconnected state through the safety component, and the clutch piece II and the lower hook are in the unconnected state, so that when the two doors (a main lock door and an auxiliary lock door) are not opened, the auxiliary lock door cannot be opened by rotating the auxiliary lock door, and the safety of the door lock is ensured.

(2) In the invention, under the closing state of two doors, as the clutch part I is not connected (separated) with the sliding part II, namely the clutch part I can not hang the sliding part II, the rotating part drives the sliding part I to move and drives the clutch part I to move, the sliding part I moves relative to the sliding part II, the sliding part II is not moved, and the lower hook is not moved; because the upper hook and the lower hook are not moved, only the rotating part, the sliding part I and the clutch part I move, the idle running protection of the auxiliary lock device is realized, the damage of the violent opening door to the auxiliary lock device is prevented, and the service life of the auxiliary lock device is ensured.

(3) According to the invention, after the auxiliary lock door is opened, the lower hook is hooked through the clutch part II, so that the lower hook cannot continuously move downwards, and the ground lock bolt below the auxiliary lock door cannot extend out, therefore, the ground lock bolt can be prevented from being scraped and touched on the floor in the opening process of the auxiliary lock door.

(4) When the two doors are closed, the safety piece pushes the clutch piece II to swing, the clutch piece II does not hook the lower hook, the lower hook automatically extends out under the action of the spring V, and the ground lock bolt on the auxiliary lock door automatically pops out, so that the auxiliary lock door can be quickly closed.

(5) The invention can realize that the door can be opened or closed both inside and outside the door, and realizes the convenient and quick opening or closing of the two doors.

Drawings

FIG. 1 is a schematic structural view of the present invention in a state where the secondary lock door is naturally closed (the primary lock door is not closed);

FIG. 2 is a schematic view of the present invention shown in FIG. 1 with the door handle turned (secondary door lock open);

FIG. 3 is a schematic structural view of the present invention when the door handle is released after the auxiliary lock door is opened (the lower hook is not extended);

FIG. 4 is a schematic structural view of the present invention in a closed state of both the primary lock door and the secondary lock door;

FIG. 5 is a schematic view of the door handle rotated when the present invention is in the state of FIG. 4 (two doors closed);

FIG. 6 is a schematic perspective view of the present invention (omitting spring I, spring II, and spring III) in a natural closed state of the secondary lock door (in the state of FIG. 1);

FIG. 7 is a schematic view showing the connection of the parts of the present invention when the upper hook and the clutch member I are omitted in FIG. 6;

FIG. 8 is a schematic view of the three-dimensional structure of the present invention (clutch member I, spring II, spring III, spring IV, and spring V are omitted) when the door handle is released, the upper hook is extended, the clutch member II hooks the lower hook, and the lower hook is not extended;

FIG. 9 is a schematic diagram of relative positions of a sliding part I, a sliding part II, a connecting piece, an upper hook, a lower hook and a clutch part I;

FIG. 10 is a schematic view of the clutch member II of the present invention in engagement with the lower hanger;

FIG. 11 is a schematic view of the clutch member I and the clutch member II of the present invention shown disconnected;

FIG. 12 is a schematic view of the structure of the glide I of the present invention;

FIG. 13 is a schematic structural view of a glide II of the present invention;

FIG. 14 is a schematic view of the structure of the upper hook of the present invention;

FIG. 15 is a schematic view of the construction of the lower hanger of the present invention;

FIG. 16 is a schematic view of the construction of clutch II of the present invention;

in the figure: 1-lock shell, 2-turning piece, 3-upper hook, 4-lower hook, 501-sliding piece I, 502-sliding piece II, 503-driving piece I, 504-driving piece II, 505-connecting piece, 601-locking dog, 602-safety piece, 603-support, 604-clutch piece I, 605-clutch piece II, 7-spring I, 8-spring II, 9-spring III, 10-spring IV, 11-spring V.

Detailed Description

The invention is further described below with reference to the figures and examples.

Examples

A secondary lock device, as shown in fig. 1, comprising:

a lock case 1;

the rotating piece 2 is arranged on the lock shell 1; the rotating part 2 is provided with teeth;

the upper hook 3 is arranged on the lock shell 1 and can move along the lock shell 1; the bolt is connected with the bolt on the auxiliary lock door and is used for controlling the opening and closing of the upper lock on the auxiliary lock door; when the upper hook 3 extends out of the lock shell 1, the upper lock bolt on the auxiliary lock door is driven to extend out of the upper part of the auxiliary lock door, so that the upper part of the auxiliary lock door is locked; when the upper hook 3 retracts towards the inside of the lock shell 1, the pin of the top lock on the door of the secondary lock retracts towards the inside of the secondary lock, and the top lock above the secondary lock is opened from the door frame, as shown in fig. 14.

The lower hook 4 is arranged on the lock shell 1 and can move along the lock shell 1; the bolt is connected with the bolt on the auxiliary lock door and is used for controlling the opening and closing of the ground lock on the auxiliary lock door; the lower hook 4 extends out of the lock shell 1 to drive a ground lock bolt on the auxiliary lock door to extend out of the lower part of the auxiliary lock door, so that the lower part of the auxiliary lock door is locked; when the lower hook 4 retracts towards the inside of the lock shell 1, the ground lock bolt on the auxiliary lock door retracts towards the inside of the auxiliary lock door, and the ground lock below the auxiliary lock door is opened from the door frame, as shown in fig. 15.

The transmission assembly comprises a sliding piece I501, a sliding piece II 502, a transmission piece I503, a transmission piece II 504 and a connecting piece 505; the structures of the sliding piece I501 and the sliding piece II 502 are shown in figures 12 and 13.

The sliding piece I501 can move on the lock shell 1; the connecting piece 505 is arranged on the sliding piece I501; be provided with the rack on sliding member I501, rotate the tooth on 2 and the rack toothing on sliding member I501 to rotate 2, drive sliding member I501 and remove, make connecting piece 505 remove on lock shell 1.

As shown in fig. 9, a sliding member ii 502 is arranged between the upper hook 3 and the sliding member i 501; the connecting piece 505 can move in the sliding piece II 502 and the upper hook 3.

The sliding piece II 502 is connected with the lower hook 4, and the sliding piece II 502 can move in the lower hook 4;

the transmission piece I503 and the transmission piece II 504 are installed on the lock shell 1, the transmission piece I503 and the transmission piece II 504 are gears or incomplete gears, and in the embodiment, the transmission piece I503 and the transmission piece II 504 are incomplete gears.

The upper hook 3 is provided with a rack, and the sliding piece II 502 is provided with a rack; the transmission member I503 is meshed and connected with the transmission member II 504; the transmission piece I503 is meshed and connected with the rack on the upper hook 3; the transmission piece II 504 is meshed with the rack on the sliding piece II 502; due to the meshing relation among the transmission piece I503, the transmission piece, the sliding piece II 502 and the upper hook 3, the sliding piece II 502 moves to drive the transmission piece II 504 to rotate, so that the transmission piece I503 rotates to drive the upper hook 3 to move; further, the movement of the upper hook 3 is controlled by the movement of the sliding member ii 502 (the sliding member ii 502 moves in the direction of the inside of the lock case 1 together with the upper hook 3 or the sliding member ii 502 moves in the direction of the outside of the lock case 1 together with the upper hook 3).

The safety clutch assembly is arranged on the lock shell 1 and used for controlling the movement of the upper hook 3 and the lower hook 4.

The safety clutch assembly comprises a lock tongue 601, a safety piece 602, a clutch piece I604 and a clutch piece II 605; the clutch member i 604 is provided on the connecting member 505 to be swingable about the connecting member 505. The structure of clutch II is shown in FIG. 16. In order to enhance the stability of the movement of the fuse 602, the fuse clutch assembly is further provided with a bracket 603;

the clutch part II 605 and the bracket 603 are arranged on the lock shell 1; the clutch member II 605 can be pivoted on the lock housing 1.

There are two situations in the connection of clutch I604 to glide II 502: when the clutch I604 and the sliding piece II 502 are in a connected state, when the sliding piece II 502 moves (moves upwards) towards the inner direction of the lock shell 1, the lower hook 4, the sliding piece II 502 and the clutch I604 form a whole to move; when the clutch member i 604 and the sliding member ii 502 are in the disconnected state, as shown in fig. 4 and fig. 11, the sliding member i 501 and the sliding member ii 502 can move relatively, i.e. the lower hook 4 is not moved, the sliding member ii 502 is not moved, the sliding member i 501 moves, the connecting member 505 moves, and the clutch member i 604 moves. The clutch member ii 605 can form a hook connection with the lower hook 4 for controlling the movement of the lower hook 4. When the clutch member II 605 and the lower hook 4 are in a connection state, as shown in fig. 8 and 10, the lower hook 4 is hooked by the clutch member II 605, and the lower hook 4 can not extend out of the lock case 1; when the clutch II 605 and the lower hook 4 are not connected, the lower hook 4 can extend out of the lock shell 1.

The safety piece 602 is arranged on the bracket 603, and the safety piece 602 can move on the bracket 603 and is connected with the bolt 601; the safety member 602 is used for pushing the clutch member I604 and the clutch member II 605 to swing. When the lock tongue 601 retracts towards the inside of the lock shell 1, the movement of the lock tongue 601 drives the safety piece 602 to move on the support 603, the clutch piece I604 and the clutch piece II 605 are pushed to swing, so that the clutch piece I604 and the sliding piece II 502 are in a disconnected state, the clutch piece II 605 and the lower hook 4 are in a disconnected state, the clutch safety function of the auxiliary locking device is started, the handle is rotated forcibly, and the auxiliary locking device cannot be damaged.

In order to facilitate the resetting of the sliding piece I501 after moving, the device is provided with a spring I7, one end of the spring I7 is connected with the lock shell 1, and the other end of the spring I7 is connected with a connecting piece 505.

In order to facilitate the resetting of the upper hook 3 after moving, the device is provided with a spring II 8, one end of the spring II 8 is connected with the lock shell 1, and the other end of the spring II is connected with the upper hook 3.

In order to facilitate the resetting of the clutch part II 605, the device is provided with a spring III 9, one end of the spring III 9 is connected with the lock shell 1, and the other end is connected with the clutch part II 605.

In order to facilitate the resetting of the clutch piece I604 and the lower hook 4 after moving, the device is provided with a spring IV 10 and a spring V11, wherein the spring IV 10 is used for resetting the clutch piece I604, and the spring V11 is used for resetting the lower hook 4.

In the embodiment, the springs iv 10 and v 11 are torsion springs.

It should be noted that, in the present invention, the connecting member 505 is mounted on the sliding member i 501, in the practical process, the connecting member 505 and the sliding member i 501 may be made into an integral structure, or a component having a similar function as the connecting member 505 is directly formed on the sliding member i 501.

The working process is as follows:

when the main lock door is opened and the auxiliary lock door is in a closed state, the lock tongue 601 extends, the safety clutch assembly is in a reset initial state, the upper hook 3 extends and the lower hook 4 extends, as shown in fig. 1, at the moment, the clutch piece I604 and the sliding piece II 502 are in a disconnected state (as shown in fig. 1 and 6), and the clutch piece II 605 and the lower hook 4 are in a disconnected state (not hooked) (as shown in fig. 1, 6 and 7).

In the state of fig. 1, when the secondary lock door needs to be opened, the handle on the door is rotated counterclockwise, as shown in fig. 2, so that the rotating member 2 rotates counterclockwise, the rotating member 2 drives the sliding member i 501 to move upward, and the sliding member i 501 drives the connecting member 505 to move upward; because the clutch I604 is arranged on the connecting piece 505, the clutch I604 moves upwards along with the sliding piece I501 and the connecting piece 505; the connecting piece 505 moves upwards to hook the sliding piece II 502, as shown in FIG. 2, the clutch piece I604 and the sliding piece II 502 are in a connected state, and the clutch piece I604 carries the sliding piece II 502 to move upwards; because the sliding piece II 502 moves upwards and the sliding piece II 502 is connected with the lower hook 4, the sliding piece II 502 drives the lower hook 4 to move upwards together, and therefore the ground lock is unlocked; on the other hand of the sliding part II 502 drives the transmission part II 504 to rotate anticlockwise through the rack on the sliding part II 502, so that the transmission part I503 rotates clockwise, and the transmission part I503 is meshed with the rack on the upper hook 3, so that the upper hook 3 is driven to move downwards, and the unlocking of the sky lock is realized. At the moment, the upper hook 3 and the lower hook 4 are retracted into the lock shell 1, as shown in fig. 2, so that the opening of the secondary lock door can be realized, and at the moment, the spring I7 is elongated, the spring II 8 is elongated, and the spring V11 is compressed.

After the auxiliary lock door is opened, when a handle is loosened, under the action of resetting (pulling force) of the spring I7, the upper hook 3 moves upwards (the upper hook 3 extends out of the lock shell 1) to drive the transmission piece I503 to rotate anticlockwise, so that the transmission piece II 504 rotates clockwise, the sliding piece II 502 is driven to move downwards, and the sliding piece II 502 moves in the lower hook 4; meanwhile, under the reset action of the spring V11, the lower hook 4 moves downwards, when the lower hook 4 moves downwards to the hooking position of the clutch part II 605, the clutch part II 605 hooks the lower hook 4, as shown in figures 3, 8 and 10, so that the lower hook 4 cannot move downwards continuously, the ground lock latch under the auxiliary lock door cannot extend out, and the ground lock latch can be prevented from being scraped and touched on the floor in the opening process of the auxiliary lock door.

When two doors (an auxiliary lock door and a main lock door) need to be closed, the auxiliary lock door is closed first, a door handle on the auxiliary lock door can be rotated anticlockwise in the state of fig. 3, the rotating piece 2 is driven to rotate anticlockwise, the rotating piece 2 drives the sliding piece I501 to move upwards, and the sliding piece I501 drives the connecting piece 505 to move upwards; the clutch I604 hooks the sliding piece II 502, and the clutch I604 drives the sliding piece II 502 to move upwards; at the moment, the clutch piece II 605 hooks the lower hook 4 (in a connection state), so that the sliding piece II 502 only moves on the lower hook 4, the sliding piece II 502 drives the transmission piece II 504 to rotate anticlockwise, the transmission piece I503 drives the upper hook 3 to move downwards, the upper hook 3 retracts, then the auxiliary lock door is closed, the door handle is loosened, and the upper hook 3 extends upwards, so that the top lock bolt locks the upper part of the auxiliary lock door; as the clutch piece II 605 still hooks the lower hook 4, the lower hook 4 can not extend out, and the ground lock can not be locked; at the moment, the main lock door is closed, the lock tongue 601 is pressed down by the main lock door, the lock tongue 601 is pushed to move into the lock shell 1, the safety piece 602 is driven to move (move leftwards), the safety piece 602 pushes the clutch piece I604 to swing, so that the clutch piece I604 is separated from the sliding piece II 502 (is in a disconnected state), and the sliding piece II 502 cannot be hung by the movement of the clutch piece I604; as the safety piece 602 continues to move (moves leftwards), the clutch piece ii 605 swings, the clutch piece ii 605 is separated from the lower hook 4 (is in an unconnected state), the lower hook 4 extends downwards (out of the lock case 1) under the reset action of the spring v 11, so that the ground-locking bolt on the auxiliary lock door is locked, as shown in fig. 4, at this time, the two doors are in a closed state, the auxiliary lock device is in a safety state, and only when the main lock door is opened, the auxiliary lock door can be opened.

In the case that both doors are closed, if the handle on the secondary lock door is forcibly rotated counterclockwise, the rotating member 2 rotates counterclockwise, the rotating member 2 drives the sliding member i 501 to move upward, the clutch member i 604 moves upward along with the connecting member 505, as shown in fig. 5, when the two doors are closed, the clutch piece I604 is separated from the sliding piece II 502 (is in a disconnected state), the clutch piece I604 cannot be hung on the sliding piece II 502, the movement of the clutch piece I604 cannot drive the sliding piece II 502 to move, the sliding piece II 502 does not move, the lower hook 4 is fixed, the transmission piece II 504, the transmission piece I503 and the upper hook 3 are fixed, the auxiliary lock door is still locked, only the rotation piece 2, the sliding piece I501 and the clutch piece I604 move, the idle rotation protection of the auxiliary lock device is realized, the damage of the violent opening door to the auxiliary lock device is prevented, and the service life of the auxiliary lock device is ensured.

The above examples are merely representative of preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these are all within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.