A latch that can be opened by pulling on the key

Abstract

The utility model relates to the technical field of lockset, specifically relates to a lock catch that can still be unlocked when the key is pulled out, the lock body includes lock shell, limit block and push device, and the push device is slidably installed in the lock shell and is equipped with a lock catch part, and the lock hook is clamped with the lock catch part through the lock hole when locking. The limit block is slidably installed in the lock shell, and the limit block blocks the push device in the locked state; when the key is unlocked, rotating the lock core with the correct key can slide the limit block from the locked position to the unlocked position, and the limit block is removed from the limit block. The limit block is provided with a containing groove, the containing groove is equipped with a ball and a spring, the spring exerts force on the ball, and the ball elastically abuts against the inner wall of the lock shell; the lock shell is provided with a positioning groove, the ball is partially embedded in the positioning groove when the limit block is in the unlocked position, the limit block is kept in the unlocked position, and the lock core is reset; the push device is pressed to drive the limit block to the locked position. Compared with the prior art, the position keeping structure of the ball and the positioning groove of the lock shell is more simple and flexible.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, specifically to a latch that can still be unlocked after the key is removed. Background Technology

[0002] With the increasing demand for luggage for work, travel, and business trips, various types of bags have become increasingly important in people's lives. People often put valuables and documents in their bags for easy carrying. Therefore, the security and theft prevention of bags are receiving more and more attention, and bag locks have become an indispensable component of bags.

[0003] In existing technology, bag locks include a locking assembly, which includes a latch and a hook respectively installed on two opening sides of the bag, which interlock to lock each other. The bag lock also includes an operating component (which can be replaced by a push, button, knob, etc.), a locking mechanism, and a transmission component. The locking mechanism is a combination lock, a key lock cylinder, or NFC. The operating component is released only after the locking mechanism is unlocked with a combination, or after the correct key is inserted and turned, or after near-field electronic sensing is triggered. The operating component then drives the latch to rotate or slide via the transmission component, disengaging from the hook and achieving unlocking.

[0004] The key lock cylinder of a bag lock typically has a rotating lever at the bottom. Turning it releases the latch, unlocking the bag. This means that to remove the key, the lock cylinder must be turned back to the locked position. However, some applications require the latch to remain in the unlocked position after the key is removed, so that the latch can be inserted to lock the bag without a key. Traditional locks cannot meet these requirements.

[0005] Subsequently, the inventor developed a flexible bag lock disclosed in Chinese patent document CN221169096U, and a bag lock with a secondary stop function disclosed in Chinese patent document CN118881256A.

[0006] In further research and development, the inventors developed a new structure that allows the lock to be opened even after the key is removed. Therefore, this application proposes a latch that can be opened even after the key is removed. Summary of the Invention

[0007] In view of the above-mentioned technical problems, the present invention provides a latch that can still be unlocked after the key is removed.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A latch is provided that can be unlocked even after the key is removed. It includes a first base and a second base fixed to both sides of the opening and closing mechanism of a bag / suitcase. The second base is provided with a lock hook. The latch also includes a lock body hinged to the first base. The lock body includes a lock shell, a limiting block, and a pusher. The lock shell has a lock hole. The pusher is slidably mounted on the lock shell, and its position inside the lock shell aligned with the lock hole has a latching part. When locked, the lock body swings towards the second base, causing the lock hook to pass through the lock hole and engage with the latching part. Its characteristic is:

[0010] The limit block is slidably installed inside the lock housing. In the locked state, the limit block blocks the pushing movement.

[0011] The lock case is equipped with a lock core. When the key is used to unlock, inserting the correct key and turning the lock core will move the limit block from the locked position to the unlocked position, thereby releasing the restriction on the push. External force is used to push the lock to separate the lock latch from the lock hook.

[0012] The limiting block is provided with a receiving groove, in which a ball and a spring are provided. The spring applies force to the ball, so that the ball elastically protrudes partially from the opening of the receiving groove. The lock housing is provided with a positioning groove. When the limiting block is in the unlocked position, the ball is partially embedded in the positioning groove, so that the limiting block is kept in the unlocked position and the lock core can be independently reset. External force pressing and pushing can drive the limiting block to the locked position.

[0013] Specifically, the lock housing is equipped with a spring that applies force to the limiting block so that the limiting block tends to be locked upwards; the holding force between the ball and the positioning groove is greater than the pushing force of the spring on the limiting block.

[0014] Specifically, the pusher is provided with an alignment part, and the limiting block is provided with an alignment groove. When the limiting block is in the locked position, the alignment part and the alignment groove are misaligned to prevent the pusher from sliding. When the limiting block is in the unlocked position, the alignment groove is aligned with the alignment part so that the alignment part can be inserted into the alignment groove, thus making room for the pusher to slide.

[0015] Specifically, the groove wall of the alignment slot is a reset slope. When the limit block is in the unlocked position, the external force drives the alignment part to abut against the reset slope, and drives the limit block to reset to the locked position in the opposite perpendicular direction.

[0016] Specifically, the inner wall of the lock case is also provided with a starting groove. When the limiting block is in the locked position, the ball is embedded in the starting groove.

[0017] Specifically, the initial groove is elongated and is arranged along the sliding direction of the limiting block.

[0018] Specifically, a transition groove is provided between the positioning groove and the initial position groove.

[0019] Specifically, the lock body is also equipped with a password component, which, after the correct password is entered, can drive the limit block to slide from the locked position to the unlocked position.

[0020] Specifically, the combination lock component is located at one end of the lock housing, and the push-button part protrudes from the other end of the lock housing. The combination lock component, the limit block, and the lock cylinder are arranged in sequence.

[0021] Specifically, the middle part of the pusher is provided with a clearance groove, and the lock core is installed in the clearance groove.

[0022] The beneficial effects of this utility model are:

[0023] This invention relates to a latch that can be unlocked even after the key is removed. When the key is inserted correctly, rotating the lock cylinder moves a limiting block from the locked position to the unlocked position. When the limiting block is in the unlocked position, a ball on the limiting block partially engages with a positioning groove, keeping the limiting block in the unlocked position while the lock cylinder can independently reset and the key can be removed. At this point, external force can push the latch to separate from the lock hook and move the limiting block back to the locked position. Compared with existing technologies, this position-holding structure, through the engagement of the ball with the positioning groove on the lock housing, is simpler and more flexible. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the latch structure in the embodiment.

[0026] Figure 2 This is an exploded view of the latch in the embodiment.

[0027] Figure 3 This is a schematic diagram of the latch behind the concealed lock case in the embodiment.

[0028] Figure 4 This is a schematic diagram of the internal structure of the lock body in the embodiment.

[0029] Figure 5 This is a cross-sectional view of the lock body in the embodiment, showing it in a locked state.

[0030] Figure 6 This is a partial schematic diagram of the lock body in an embodiment, showing the state where the lock cylinder has been reset and the key can be removed after the key has been unlocked.

[0031] Figure 7 This is a cross-sectional view of the lock body in an embodiment, showing a schematic diagram of the lock body being reset and the key being able to be removed after the key has been unlocked.

[0032] Figure label:

[0033] First base 1;

[0034] Second base 2, locking hook 21;

[0035] Lock body 3;

[0036] Lock housing 4, lock hole 41, positioning groove 42, initial position groove 43, transition groove 44;

[0037] Limiting block 5, receiving groove 51, alignment groove 52, reset inclined surface 53, sphere 54;

[0038] Push-button 6, locking part 61, alignment part 62, clearance groove 63;

[0039] 7. Lock core; 8. Password component. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0041] The latch in this embodiment, such as Figures 1 to 7 As shown, the lock includes a first base 1 and a second base 2 fixed to both sides of the opening and closing of the bag. The second base 2 is provided with two locking hooks 21 arranged separately. The lock also includes a lock body 3 hinged to the first base 1. The lock body 3 includes a lock shell 4, a limiting block 5 and a pusher 6. The lock shell 4 is provided with two lock holes 41 corresponding to the locking hooks 21. The pusher 6 is slidably installed on the lock shell 4 and is provided with a latching part 61 inside the lock shell 4 and aligned with the lock holes 41. When locked, the lock body 3 swings toward the second base 2, so that the locking hooks 21 pass through the lock holes 41 and lock with the latching part 61, preventing the lock body 3 from leaving the second base 2.

[0042] In this embodiment, the limiting block 5 is slidably installed inside the lock housing 4, and the sliding direction of the limiting block 5 is perpendicular to the sliding direction of the pusher 6. In the locked state, the limiting block 5 blocks the movement of the pusher 6.

[0043] The lock case 4 is equipped with a lock core 7. When the key is used to unlock, inserting the correct key and turning the lock core 7 can move the limit block 5 from the locked position to the unlocked position, thereby releasing the restriction on the push mechanism 6. When the external force is applied to press the push mechanism 6, the latch part 61 is separated from the lock hook 21, and the lock body 3 can swing away from the second base 2.

[0044] The main improvement lies in the inclusion of a receiving groove 51 in the limiting block 5. A ball 54 and a spring (simplified by a broken line in the diagram) are housed within the groove 51. The spring applies force to the ball, causing it to elastically protrude partially from the opening of the receiving groove 51. The inner wall of the lock housing 4 has a positioning groove 42. When the limiting block 5 is in the unlocked position, the ball 54 is partially embedded in the positioning groove 42, while remaining partially in the receiving groove 51. This keeps the limiting block 5 in the unlocked position while the lock core 7 can independently reset and the key can be removed. At this time, the limiting block 5 no longer obstructs the push mechanism 6. External force presses down on the push mechanism 6, causing the latch 61 to separate from the lock hook 21 and moving the limiting block 5 to the locked position. In practice, the receiving groove 51 does not necessarily need to be located on the inner wall of the lock housing 4. It is sufficient if such a groove exists inside the lock housing 4 for the ball 54 to be inserted and positioned; the location is not limited. However, it is preferable to locate it on the inner wall of the lock housing 4, as this integrated structure facilitates manufacturing and results in a more compact structure.

[0045] Specifically, the lock housing 4 is equipped with a spring (not shown in the figure) that applies force to the limiting block 5, so that the limiting block 5 tends to remain in the locked position. The holding force between the ball and the positioning groove 42 is greater than the pushing force of the spring on the limiting block 5, thus ensuring that the limiting block 5 can be held in the unlocked position after the force of the lock core 7 is lost. When the pusher 6 is pressed to force the limiting block 5 to slide, after the ball disengages from the positioning groove 42, the spring here assists in returning to the locked position.

[0046] Specifically, the pusher 6 is provided with an alignment part 62, and the limiting block 5 is provided with an alignment groove 52. When the limiting block 5 is in the locked position, the alignment part 62 and the alignment groove 52 are misaligned to prevent the pusher 6 from sliding. When the limiting block 5 is in the unlocked position, the alignment groove 52 is aligned with the alignment part 62 so that the alignment part 62 can be inserted into the alignment groove 52, thus allowing space for the pusher 6 to slide.

[0047] Specifically, the groove wall of the alignment groove 52 is a reset slope 53. When the limit block 5 is in the unlocked position, the external force drives the pusher 6 to make the alignment part 62 abut against the reset slope 53, thereby driving the limit block 5 to reset to the locked position in the opposite perpendicular direction.

[0048] Specifically, the inner wall of the lock case 4 is also provided with a starting groove 43. When the limiting block 5 is in the locked position, the ball 54 is embedded in the starting groove 43, and the spring acting on the ball 54 can be better extended and the elastic force is smaller, reducing the friction between the ball and the inner wall of the lock case 4 when the limiting block 5 moves.

[0049] Specifically, the initial position groove 43 is elongated and is arranged along the sliding direction of the limiting block 5.

[0050] Specifically, a transition groove 44 is provided between the positioning groove 42 and the initial groove 43. The transition groove 44, like the positioning groove 42, is used to engage with the ball 54 to lock the limiting block 5. The limiting block 5 has two adjacent aligning grooves 52, both with inclined walls. When the limiting block 5 is in the unlocked position, pressing the push button 6 will force the limiting block 5 to slide against the reset inclined surface 53 of the aligning groove 52. The ball 54 will move from the positioning groove 42 to the transition groove 44, locking the limiting block 5 again. In this state, the push button 6 can still be pressed again, similarly causing the limiting block 5 to fully reset to the locked position, and the ball 54 returns to the initial groove 43. That is, after the lock core 7 resets and the key is removed, the lock can be opened twice by pressing the push button 6 twice. Of course, in practice, the depth of the transition groove 44 can be designed to be slightly shallower. Its function is only to reduce the friction between the ball 54 and the inner wall of the lock shell 4 during the movement. In this way, when the limit block 5 is reset, the ball 54 will not be stuck by the transition groove 44 and will be directly reset to the locked position.

[0051] Specifically, the lock body 3 also includes a password component 8, which, after the correct password is entered, can drive the limit block 5 to slide from the locked position to the unlocked position. This is existing technology and will not be elaborated upon here.

[0052] Specifically, the combination lock component 8 is located at one end of the lock housing 4, and the push mechanism 6 partially protrudes from the other end of the lock housing 4. The combination lock component 8, the limiting block 5, and the lock cylinder 7 are arranged sequentially. The push mechanism 6 has a relief groove 63 in the middle, and the lock cylinder 7 is installed in the relief groove 63. The overall layout is compact and stable.

[0053] In the description of this utility model, it is obvious that the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0054] 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 claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0055] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0056] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A latch that can be unlocked even after the key is removed, comprising a first base (1) and a second base (2) fixed to the opening and closing sides of a bag, the second base (2) being provided with a latch hook (21), and a lock body (3) hinged to the first base (1), the lock body (3) comprising a lock shell (4), a limiting block (5) and a pusher (6), the lock shell (4) being provided with a lock hole (41), the pusher (6) being slidably mounted on the lock shell (4) and having a latch part (61) located inside the lock shell (4) aligned with the lock hole (41), the lock body (3) swinging toward the second base (2) when locked, causing the latch hook (21) to pass through the lock hole (41) and engage with the latch part (61); characterized in that: The limiting block (5) is slidably installed inside the lock housing (4). In the locked state, the limiting block (5) blocks the movement of the pusher (6). The lock case (4) is provided with a lock core (7). When the key is unlocked, inserting the correct key and turning the lock core (7) can move the limit block (5) from the locked position to the unlocked position, thereby releasing the restriction on the pusher (6). External force operates the pusher (6) to separate the latch (61) from the lock hook (21). The limiting block (5) is provided with a receiving groove (51), in which a ball (54) and a spring are provided. The spring applies force to the ball (54) so ​​that the ball (54) elastically protrudes partially from the opening of the receiving groove (51). The lock shell (4) is provided with a positioning groove (42). When the limiting block (5) is in the unlocked position, the ball (54) is partially embedded in the positioning groove (42), so that the limiting block (5) is kept in the unlocked position and the lock core (7) can be independently reset. The external force pressing the pusher (6) can drive the limiting block (5) to move to the locked position.

2. The latch according to claim 1, which can still be unlocked after the key is removed, is characterized in that: The lock housing (4) is equipped with a spring that applies force to the limiting block (5) so that the limiting block (5) tends to be locked upwards; the holding force between the ball (54) and the positioning groove (42) is greater than the pushing force of the spring on the limiting block (5).

3. A latch that can still be unlocked even after the key is removed, as described in claim 1, characterized in that: The pusher (6) is provided with an alignment part (62), and the limiting block (5) is provided with an alignment groove (52). When the limiting block (5) is in the locked position, the alignment part (62) and the alignment groove (52) are misaligned to prevent the pusher (6) from sliding. When the limiting block (5) is in the unlocked position, the alignment groove (52) is aligned with the alignment part (62) so that the alignment part (62) can be inserted into the alignment groove (52), thus allowing space for the pusher (6) to slide.

4. A latch that can still be unlocked even after the key is removed, as described in claim 3, characterized in that: The groove wall of the alignment groove (52) is a reset slope (53). When the limit block (5) is in the unlocked position, the external force drives the push (6) to make the alignment part (62) abut against the reset slope (53), and drive the limit block (5) to reset to the locked position in the opposite direction.

5. A latch that can still be unlocked even after the key is removed, as described in claim 1, characterized in that: The inner wall of the lock housing (4) is also provided with a starting position groove (43). When the limiting block (5) is in the locked position, the ball (54) is embedded in the starting position groove (43).

6. A latch that can still be unlocked even after the key is removed, as described in claim 5, characterized in that: The initial groove (43) is long and narrow, and it is arranged along the sliding direction of the limiting block (5).

7. A latch that can still be unlocked even after the key is removed, as described in claim 5, characterized in that: A transition groove (44) is also provided between the positioning groove (42) and the initial position groove (43).

8. A latch that can still be unlocked even after the key is removed, as described in claim 1, characterized in that: The lock body (3) is also provided with a password component (8), which can drive the limit block (5) to slide from the locked position to the unlocked position after the correct password is entered.

9. A latch that can still be unlocked even after the key is removed, as described in claim 8, characterized in that: The combination component (8) is located at one end of the lock shell (4), and the pusher (6) partially protrudes from the other end of the lock shell (4). The combination component (8), the limit block (5), and the lock core (7) are arranged in sequence.

10. A latch that can still be unlocked after the key is removed, as described in claim 9, characterized in that: The pusher (6) has a relief groove (63) in the middle, and the lock core (7) is installed in the relief groove (63).

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