CN118881256A - A luggage lock with secondary stop function - Google Patents

Abstract

The invention relates to the technical field of case locks, in particular to a case lock with a secondary stop function, which comprises a lock body and a lock hook, wherein the lock body comprises a lock shell, a push button, a key lock cylinder and a lock block, an inner embedded block is slidably arranged in the push button, and two stop pins are slidably arranged on the inner embedded block; the push button is provided with a stop hole, and an unlocking part is arranged in the lock shell; when unlocking, the key lock cylinder is operated to rotate, the embedded block is stirred by the lock block to move from the locking position to the unlocking position, and the restriction of the lock block on the embedded block is relieved to unlock; meanwhile, one of the stop pins is inserted into the stop hole to prevent the embedded block from resetting, and the other stop pins pass through the stop hole along the direction of unlocking the embedded block; the push button is pressed by force each time, the unlocking part can be propped against the stop pin originally inserted into the stop hole to be separated, the next stop pin is inserted into the stop hole to continuously stop the embedded block until all the stop pins leave the stop hole towards the upper locking position, and the embedded block is reset to the upper locking position, so that the secondary stop function of the embedded block is realized.

Description

A luggage lock with secondary stop function

Technical Field

The present invention relates to the technical field of luggage locks, and in particular to a luggage lock with a secondary stopping function.

Background Art

With the need of people to travel for work, tourism, business trips, etc., all kinds of bags have occupied an increasingly important position in people's lives. People often put some valuables and materials into bags for easy carrying. Therefore, the safety and anti-theft of bags are increasingly valued by people, and bag locks have become an indispensable part of bags.

In the prior art, the luggage lock includes a locking assembly, which includes a lock part and a lock hook respectively installed on the two opening and closing sides of the luggage, and the two are locked with each other. The luggage lock also includes an operating member (which can be replaced by a push button, a knob, etc.), a locking mechanism and a transmission member. The locking mechanism is a password lock, a key lock cylinder or NFC. The restriction of the operating member can only be released after the password of the locking mechanism is unlocked or the correct key is inserted and turned or the near-field electric control induction is triggered. The operating member drives the lock part to rotate or slide through the transmission member, and releases the lock from the lock hook to achieve unlocking.

The key lock cylinder of the luggage lock is generally provided with a rotating block at the bottom of the lock cylinder, which is rotated to release the restriction on the lock hook to unlock. This means that in order to pull out the key, the lock cylinder must be turned back to the locked position before the key can be pulled out. However, in some use occasions, it is required that the lock part can be kept in the unlocked position after the key is pulled out, so that the lock hook can be inserted to lock without the key. Traditional locks cannot meet the above requirements.

Therefore, the inventor has developed a flexible luggage lock as disclosed in the Chinese patent document with the announcement number CN221169096U, including a lock body and a lock hook, the lock body including a lock shell, a lock buckle, a key lock cylinder and a limit piece, the lock buckle and the limit piece can be movably installed in the lock shell, the lock hook can be inserted into the lock shell and buckled with the lock buckle, the lock buckle is locked due to the limit piece, and the external force operation to rotate the key lock cylinder can move the limit piece from the locked position to the unlocked position to release the restriction on the lock buckle and unlock the lock; in the unlocking direction, the key lock cylinder can move the limit piece; in the locking direction, the key lock cylinder is reset independently of the limit piece; a stop piece is also provided in the lock shell, when the limit piece moves to the unlocking position, the stop piece automatically clamps the limit piece, so that the lock buckle remains in the unlocking position, and the key lock cylinder can be reset to pull out the key. When the lock hook is inserted into the lock body, it can overcome the action force of the stop member and drive the limit member to the locking position. In the case of no key, the lock hook can also be inserted to lock.

It was further discovered during use that after the lock hook was inserted into the lock body, the limiter immediately returned to the locked position. Although the lock remained unlocked after the key was pulled out, it could only be locked once. If the lock needed to be unlocked again, the key needed to be inserted again or the correct password needed to be entered.

Summary of the invention

In view of all or part of the above technical problems existing in the prior art, the present invention provides a luggage lock with a secondary stopping function.

To achieve the above object, the present invention provides the following technical solutions:

Provided is a luggage lock with a secondary stop function, comprising a lock body and a lock hook, the lock body comprising a lock shell, a push knob, a key lock core and a lock block, the push knob being slidably mounted on the lock shell and partially exposed, a lock catch portion being arranged at a portion of the push knob located in the lock shell, a lock hole being arranged in the lock shell, the lock hook being able to be inserted into the lock hole and being engaged with the lock catch portion; a first spring for applying force to the push knob is arranged in the lock shell, so that the push knob maintains an outward locking tendency, and when unlocking, an external force overcomes the action force of the first spring and presses the push knob inward to separate the lock hook from the lock catch portion;

The lock block is movably mounted on the lock housing, the push knob is slidably provided with an embedded block, and the lock housing is provided with a second spring that applies force to the embedded block so that the embedded block maintains a tendency to reset and lock; the embedded block is slidably provided with two or more stop pins arranged in parallel and at intervals; the push knob is provided with a stop hole, and the lock housing is provided with an unlocking part that can be inserted into the stop hole;

In the locked state, the embedded block is in the locked position and is resisted by the locking block to limit the pushing and twisting movement, and the stop pin and the stop hole are staggered;

When unlocking, the key lock cylinder is turned by external force to move the embedded block from the locked position to the unlocked position through the lock block, so as to release the restriction of the lock block on the embedded block and unlock; at the same time, one of the stop pins is inserted into the stop hole to prevent the embedded block from resetting, and the other stop pins follow the embedded block to pass through the stop hole in the unlocking direction;

After unlocking, the reset of the key lock cylinder and the lock block is independent of the reset of the embedded block;

Each time the push knob is pressed, the unlocking portion can push against the stop pin originally inserted in the stop hole to disengage, and the embedded block moves in the locking direction under the action of the second spring, and the next stop pin is inserted into the stop hole to continue to stop the embedded block, until all the stop pins leave the stop hole towards the locking position, and the embedded block is reset to the locked position.

As a further optional solution, the push knob is provided with a receiving cavity for the embedded block to slide in a directional manner, and the stop hole is opened on the side wall of the receiving cavity.

As a further optional solution, the side wall of the stop hole facing the locking direction is an inclined wall, so that when the embedded block moves in the unlocking direction, the stop pin is not blocked by the wall and crosses the stop hole; the side wall of the stop hole facing the unlocking direction is a vertical wall, so that when the embedded block moves in the locking direction, the stop pin is inserted into the stop hole to prevent the embedded block from resetting to the locked position.

As a further optional solution, the embedded block is provided with a receiving cavity for each stop pin to slide in a directional manner, and a third spring is provided in the receiving cavity to apply force to the stop pin so that the stop pin is automatically inserted after being aligned with the stop hole.

As a further optional solution, the unlocking portion is an unlocking protrusion integrally formed on the lock housing.

As a further optional scheme, the lock hook is provided with a first guide arc surface and a first hooking surface, and the lock buckle part is provided with a second guide arc surface and a second hooking surface. When the lock hook is inserted into the lock hole, the first guide arc surface presses against the second guide inclined surface so that the push button is pressed down until the first guide arc surface is separated from the second guide arc surface, and the first hooking surface cooperates with the second hooking surface to lock.

As a further optional solution, the movement direction of the embedded block is perpendicular to the push-twist movement direction.

As a further optional solution, the direction in which the stop pin is inserted into the stop hole is parallel to the active direction of the push and twist.

As a further optional scheme, the lock block is in the shape of an elongated strip, and is installed at the bottom of the key lock cylinder, and the key lock cylinder can drive the lock block to rotate together; the lock block is provided with an elongated hole along the length direction so that the lock block can slide relative to the key lock cylinder; a password assembly is also provided in the lock shell, which includes a floating block, multiple coding wheels and multiple password wheels, the multiple coding wheels are rotatably installed in the lock shell and partially exposed, the multiple coding wheels are installed one by one on the inner side of the multiple password wheels and rotate together with each other, and a concave-convex matching structure is provided between the coding wheel and the floating block, and when the password is wrong, the floating block resists the lock block; when the password is correct, the floating block moves up and is staggered with the lock block.

As a further optional solution, the lock body also includes a base for fixing to one opening and closing side of the bag, the lock hook is fixed to the other opening and closing side of the bag, the lock shell is hinged to the base, and a fourth spring is arranged between the base and the lock shell so that after the lock hook is disengaged from the lock buckle part, the lock shell automatically tilts up relative to the base.

Beneficial effects of the present invention:

Compared with the prior art, the luggage lock with a secondary stopping function of the present invention can disengage the stop pin originally inserted in the stop hole and insert the next stop pin each time the push knob is pressed, and the embedded block moves one step closer to the locking position, so as to control the number of times the push knob is pressed to unlock the door when the key is pulled out after unlocking the door.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the structure of a luggage lock in an embodiment.

FIG. 2 is a schematic diagram of the luggage lock in the embodiment in an unlocked state.

FIG. 3 is an exploded view of the luggage lock in the embodiment.

FIG. 4 is a schematic diagram of the structure of the lock hook and the push-twist mechanism in the embodiment.

FIG5 is a schematic diagram of the structure of the password component, key lock cylinder, lock block, push knob and embedded block in the embodiment.

FIG. 6 is a schematic diagram of the internal structure of the luggage lock in the embodiment, which is in a locked state.

FIG. 7 is an internal cross-sectional view of the luggage lock in the embodiment, in a locked state.

FIG8 is a schematic diagram of the internal structure of the luggage lock in the embodiment, in a state where the key is pulled out after being unlocked.

FIG. 9 is an internal cross-sectional view of the luggage lock in the embodiment, in a state where the key is pulled out for the first time after being unlocked.

FIG. 10 is a schematic diagram of the internal structure of the luggage lock in the embodiment, in a state of the second stop position after the push knob is pressed once.

11 is an internal cross-sectional view of the luggage lock in the embodiment, in a state of a second stop position after the push knob is pressed once.

Reference numerals:

Lock hook 1, first guide arc surface 11, first hooking surface 12;

Lock body 2, base 21;

Lock housing 3, lock hole 31, unlocking portion 32;

Push-twist 4, locking portion 41, second guide arc surface 411, second hooking surface 412, stop hole 42, inclined wall 421, vertical wall 422, accommodating cavity 43;

Key lock cylinder 5, lock block 51, long hole 511;

Inlaid block 6, storage cavity 61;

Stop pin 7;

Password component 8, floating block 81, code adjustment wheel 82, password wheel 83.

DETAILED DESCRIPTION

The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

The luggage lock of this embodiment, as shown in Figures 1 to 11, includes a lock body 2 and a lock hook 1. The lock body 2 includes a base 21, a lock shell 3, a push knob 4, a key lock cylinder 5 and a lock block 51. The base 21 is used to be fixed on one opening and closing side of the luggage. The lock shell 3 is hinged to the base 21, and the lock shell 3 can swing within a certain angle range relative to the base 21. The push knob 4 is slidably installed on the lock shell 3 with limited travel and partially exposed. The part of the push knob 4 located in the lock shell 3 is provided with a lock buckle 41, and the lock shell 3 is provided with a lock hole 31. The lock hook 1 is fixed to the other opening and closing side of the luggage, and the lock hook 1 can be inserted into the lock hole 31 and buckled with the lock buckle 41. A first spring (not shown in the figure, one end of the first spring abuts against the push knob 4, and the other end abuts against the lock shell 3) is provided in the lock shell 3 to apply force to the push knob 4, so that the push knob 4 maintains an outward locking trend. When unlocking, the external force overcomes the action force of the first spring and presses the push knob 4 inward to make the lock hook 1 disengage from the lock buckle 41. A compressed fourth spring is arranged between the base 21 and the lock shell 3 (not shown in the figure, one end of the fourth spring abuts against the base 21, and the other end abuts against the bottom of the lock shell 3). After the lock hook 1 is disengaged from the lock catch 41, the lock shell 3 automatically tilts up relative to the base 21.

The lock block 51 is rotatably mounted on the lock housing 3, and the push knob 4 is slidably provided with an embedded block 6, and the movement direction of the embedded block 6 is perpendicular to the movement direction of the push knob 4. A second spring (not shown in the figure, one end of the second spring abuts against the embedded block 6, and the other end abuts against the push knob 4) is provided in the lock housing 3 to apply force to the embedded block 6, so that the embedded block 6 maintains the tendency to reset and lock. As shown in FIG6 , the second spring applies a rightward thrust to the embedded block 6. The embedded block 6 is slidably provided with two stop pins 7 arranged in parallel and spaced apart. In FIG6 to FIG11 , the stop pin 7 can move up and down, and the push knob 4 is provided with a stop hole 42, and the direction in which the stop pin 7 is inserted into the stop hole 42 is parallel to the movement direction of the push knob 4. An unlocking portion 32 capable of being inserted into the stop hole 42 is provided in the lock housing 3, and the unlocking portion 32 is an unlocking protrusion integrally injection-molded on the lock housing 3.

As shown in Fig. 6 and Fig. 7, in the locked state, the inner block 6 is in the locked position and is blocked by the locking block 51 to limit the movement of the push knob 4, and the push knob 4 cannot be pressed, so the locking portion 41 of the push knob 4 remains locked with the lock hook 1. At this time, the stop pin 7 and the stop hole 42 are staggered.

When unlocking, the key lock cylinder 5 is rotated by external force to move the embedded block 6 from the locked position to the unlocked position through the lock block 51, so as to release the restriction of the lock block 51 on the embedded block 6 and unlock, as shown in Figures 8 and 9. At the same time, the stop pin 7 on the left follows the embedded block 6 to the unlocking direction (to the left) and passes through the stop hole 42, and the stop pin 7 on the right is inserted into the stop hole 42 to prevent the embedded block 6 from resetting. After unlocking, the embedded block 6 deviates from the rotation track range of the lock block 51, and the reset of the key lock cylinder 5 and the lock block 51 is independent of the reset of the embedded block 6, that is, the reset of the lock block 51 will not involve the reset of the embedded block 6.

In the state shown in Figures 8 and 9, the inner block 6 is no longer restrained by the lock housing 3, so the push knob 4 can be pressed. However, each time the push knob 4 is pressed, the unlocking portion 32 can be disengaged from the stop pin 7 originally inserted in the stop hole 42, and the inner block 6 moves in the locking direction (towards the right) under the action of the second spring, and the next stop pin 7 is inserted into the stop hole 42 to continue to stop the inner block 6, forming the state shown in Figures 10 and 11. After all the stop pins 7 leave the stop hole 42 toward the locking position, the inner block 6 is reset to the locked position.

In practice, three or more stop pins 7 can be set according to the needs of the usage scenario. Each time the push button 4 is pressed, the stop pin 7 originally inserted in the stop hole 42 can be disengaged and the next stop pin 7 can be inserted. The embedded block 6 moves one step closer to the locked position, which can control the number of times the push button 4 is pressed to unlock the door when the key is pulled out after unlocking the door.

Specifically, the lock block 51 is in the shape of an elongated strip, and the lock block 51 is installed at the bottom of the key lock cylinder 5. The key lock cylinder 5 can drive the lock block 51 to rotate together. The lock block 51 is provided with an elongated hole 511 along the length direction, so that the lock block 51 can slide relative to the key lock cylinder 5. A password assembly 8 is also provided in the lock housing 3, which includes a floating block 81, a plurality of code adjustment wheels 82 and a plurality of code wheels 83. The plurality of code adjustment wheels 83 are rotatably installed in the lock housing 3 and partially exposed. The plurality of code adjustment wheels 82 are correspondingly installed on the inner side of the plurality of code wheels 83 and rotate together with each other. A concave-convex matching structure in the prior art is provided between the code adjustment wheel 82 and the floating block 81. When the password is wrong, the floating block 81 resists the lock block 51; when the password is correct, the floating block 81 moves up and staggers with the lock block 51, and the lock block 51 can move along the length direction to unlock.

In this embodiment, the push knob 4 is provided with a receiving cavity 43 for the embedded block 6 to slide in a directional manner, and the stop hole 42 is opened on the side wall of the receiving cavity 43. The stop hole 42 satisfies that: the stop pin 7 can pass through the stop hole 42 without being blocked in the unlocking direction, and the stop pin 7 is inserted into the stop hole 42 and clamped in the locking direction. Specifically, it is achieved as follows: the side wall of the stop hole 42 in the locking direction is an inclined wall 421, so that when the embedded block 6 moves in the unlocking direction, the stop pin 7 is not blocked by the wall and crosses the stop hole 42; the side wall of the stop hole 42 in the unlocking direction is a vertical wall 422, so that when the embedded block 6 moves in the locking direction, the stop pin 7 is inserted into the stop hole 42 to prevent the embedded block 6 from resetting to the locked position.

In this embodiment, the embedded block 6 is provided with a receiving cavity 61 for each stop pin 7 to slide in a directional manner, and the receiving cavity 61 is provided with a third spring (not shown in the figure, one end of the third spring abuts against the stop pin 7, and the other end abuts against the top of the receiving cavity 61) to apply force to the stop pin 7, so that the stop pin 7 is automatically inserted after being aligned with the stop hole 42.

In this embodiment, the lock hook 1 is provided with a first guide arc surface 11 and a first hooking surface 12, and the lock buckle part 41 is provided with a second guide arc surface 411 and a second hooking surface 412. When the lock hook 1 is inserted into the lock hole 31, the first guide arc surface 11 presses against the second guide inclined surface so that the push button 4 is pressed down until the first guide arc surface 11 is separated from the second guide arc surface 411, and the first hooking surface 12 cooperates with the second hooking surface 412 to lock.

In the description of the present invention, it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations.

Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of the present invention.

In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims (10)

1. A luggage lock with a secondary stop function, characterized in that it comprises a lock body (2) and a lock hook (1), the lock body (2) comprises a lock shell (3), a push knob (4), a key lock cylinder (5) and a lock block (51), the push knob (4) is slidably mounted on the lock shell (3) and partially exposed, a lock catch portion (41) is provided at a position of the push knob (4) located in the lock shell (3), the lock shell (3) is provided with a lock hole (31), the lock hook (1) can be inserted into the lock hole (31) and engage with the lock catch portion (41); a first spring is provided in the lock shell (3) to apply force to the push knob (4) so that the push knob (4) maintains an outward locking tendency, and when unlocking, an external force overcomes the action force of the first spring to press the push knob (4) inward so that the lock hook (1) is separated from the lock catch portion (41); The lock block (51) is movably mounted on the lock housing (3); an inner block (6) is slidably disposed in the push-twist (4); a second spring is disposed in the lock housing (3) to apply force to the inner block (6) so that the inner block (6) maintains a tendency to reset and lock; the inner block (6) is slidably disposed with two or more stop pins (7) arranged in parallel and at intervals; the push-twist (4) is provided with a stop hole (42), and an unlocking portion (32) capable of being inserted into the stop hole (42) is disposed in the lock housing (3); In the locked state, the embedded block (6) is in the locked position and is resisted by the locking block (51) to limit the movement of the push-twist (4), and the stop pin (7) is staggered with the stop hole (42); When unlocking, the key lock cylinder (5) is rotated by external force to move the inner block (6) from the locked position to the unlocked position via the lock block (51), so as to release the restriction of the lock block (51) on the inner block (6) and unlock; at the same time, one of the stop pins (7) is inserted into the stop hole (42) to prevent the inner block (6) from returning to its original position, and the other stop pins (7) follow the inner block (6) to pass through the stop hole (42) in the unlocking direction; After unlocking, the key lock cylinder (5) and the lock block (51) are reset independently of the reset of the embedded block (6); Each time the push knob (4) is pressed down with force, the unlocking portion (32) can be disengaged by pressing against the stop pin (7) originally inserted into the stop hole (42), and the embedded block (6) moves in the locking direction under the action of the second spring, and the next stop pin (7) is inserted into the stop hole (42) to continue to stop the embedded block (6), until all the stop pins (7) leave the stop hole (42) towards the locking position, and the embedded block (6) is reset to the locked position. 2. A luggage lock with a secondary stopping function according to claim 1, characterized in that: the push knob (4) is provided with a receiving cavity (43) for the embedded block (6) to slide therein in a directional manner, and the stopping hole (42) is opened on the side wall of the receiving cavity (43). 3. A luggage lock with a secondary stopping function according to claim 2, characterized in that: the side wall of the stop hole (42) facing the locking direction is an inclined wall (421), so that when the embedded block (6) moves in the unlocking direction, the stop pin (7) is not blocked by the wall and crosses the stop hole (42); the side wall of the stop hole (42) facing the unlocking direction is a vertical wall (422), so that when the embedded block (6) moves in the locking direction, the stop pin (7) is inserted into the stop hole (42) to prevent the embedded block (6) from resetting to the locked position. 4. A luggage lock with a secondary stopping function according to claim 1, characterized in that: the embedded block (6) is provided with a receiving cavity (61) for each stop pin (7) to slide therein in a directional manner, and a third spring is provided in the receiving cavity (61) to apply force to the stop pin (7) so that the stop pin (7) is automatically inserted after being aligned with the stop hole (42). 5. The luggage lock with secondary stopping function according to claim 1, characterized in that the unlocking portion (32) is an unlocking protrusion integrally formed on the lock housing (3). 6. A luggage lock with a secondary stopping function according to claim 1, characterized in that: the lock hook (1) is provided with a first guide arc surface (11) and a first hooking surface (12), and the lock buckle part (41) is provided with a second guide arc surface (411) and a second hooking surface (412), and when the lock hook (1) is inserted into the lock hole (31), the first guide arc surface (11) abuts against the second guide inclined surface so that the push button (4) is pressed down until the first guide arc surface (11) is separated from the second guide arc surface (411), and the first hooking surface (12) and the second hooking surface (412) cooperate to lock. 7. A luggage lock with a secondary stop function according to claim 1, characterized in that the moving direction of the embedded block (6) is perpendicular to the moving direction of the push-twist (4). 8. A luggage lock with a secondary stopping function according to claim 7, characterized in that the direction in which the stop pin (7) is inserted into the stop hole (42) is parallel to the moving direction of the push-twist (4). 9. A luggage lock with a secondary stop function according to claim 1, characterized in that: the lock block (51) is in the shape of an elongated strip, the lock block (51) is installed at the bottom of the key lock cylinder (5), and the key lock cylinder (5) can drive the lock block (51) to rotate together; the lock block (51) is provided with an elongated hole (511) along the length direction so that the lock block (51) can slide relative to the key lock cylinder (5); a password component (8) is also provided in the lock housing (3), which includes a floating block (81) , a plurality of code adjustment wheels (82) and a plurality of password wheels (83), the plurality of password wheels (83) are rotatably mounted on the lock housing (3) and partially exposed, the plurality of code adjustment wheels (82) are mounted one by one on the inner sides of the plurality of password wheels (83) and rotate together, a concave-convex matching structure is provided between the code adjustment wheels (82) and the floating block (81), when the password is wrong, the floating block (81) resists the lock block (51); when the password is correct, the floating block (81) moves up and staggers with the lock block (51). 10. A luggage lock with a secondary stopping function according to claim 1, characterized in that: the lock body (2) also includes a base (21) for fixing to one opening and closing side of the luggage, the lock hook (1) is fixed to the other opening and closing side of the luggage, the lock shell (3) is hinged to the base (21), and a fourth spring is arranged between the base (21) and the lock shell (3), so that after the lock hook (1) is separated from the locking part (41), the lock shell (3) automatically tilts up relative to the base (21).