A lock with automatically adjustable bolt length

Abstract

The utility model discloses a lock with automatically adjustable bolt length, which comprises a lock body, an outer lock core, an inner lock core and a bolt, the bolt is placed in the lock body, the bolt is composed of a bolt piece, a connecting rod and a push piece, a support piece is arranged in the middle of the lock body, an arc-shaped slot for the connecting rod to pass through is arranged on the support piece, a spring is arranged between the rear end of the bolt and the lock body, and the spring drives the bolt to pop out outward; the inner lock core is rotatably arranged in the lock body and located between the support piece and the push piece, the outer lock core drives the inner lock core to rotate, the inner lock core can push the push piece backward, and the bolt is driven to retract into the lock body. The utility model sets a spring at the rear end of the bolt, the length of the bolt can be automatically adjusted according to the actual use, precise adaptation is realized, smooth locking is ensured, the adaptability of the lock is greatly improved, and the lock has wide application prospects in many fields such as doors, windows and cover plates, and can bring users convenient and reliable locking experience.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, and in particular to a lock with an automatically adjustable bolt length. Background Technology

[0002] Locks play a crucial role in security and protection in daily life and various building facilities. Common door locks mainly consist of components such as the lock body, bolt, lock cylinder, and key. The bolt is the core part of the lock; it achieves the locking function by extending and retracting.

[0003] Currently, most lock tongues are of fixed length and have a rigid structure. During installation, it is necessary to ensure that the relative position of the lock tongue and the door frame is correct, and that the lock body and the door leaf are securely installed. However, during long-term use, due to environmental factors (such as wood deformation caused by humidity changes), limitations in installation techniques, or external impacts, doors and windows may deform, cabinet frames may experience slight displacement, or the distance between moving and fixed parts may change. This can prevent the lock tongue from accurately inserting into the keyhole, causing the lock to fail to close properly, affecting both ease of use and security. Furthermore, frequent encounters with such mismatches can easily cause wear on the lock tongue and keyhole, further shortening the lock's lifespan. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a lock with an automatically adjustable bolt length, which allows for flexible adjustment of the bolt length, ensuring smooth operation of the lock and enhancing security and durability.

[0005] Therefore, the technical solution of this utility model is: a lock with automatically adjustable bolt length, comprising a lock body, an outer lock cylinder, an inner lock cylinder, and a bolt. The bolt is placed inside the lock body and consists of a bolt plate, a connecting rod, and a lever plate. A support plate is provided in the middle of the lock body, and the support plate has an arc-shaped groove for the connecting rod to pass through. A spring is provided between the rear end of the bolt and the lock body, and the spring drives the bolt to pop outward. The inner lock cylinder is rotatably installed inside the lock body, located between the support plate and the lever plate. The outer lock cylinder drives the inner lock cylinder to rotate, and the inner lock cylinder can push the lever plate backward, causing the bolt to retract into the lock body.

[0006] Based on the above scheme and as a preferred embodiment of the above scheme: the rear end of the connecting rod is provided with a spring mounting hole, the rear end of the lock body is provided with a positioning post, one end of the spring is fixed in the spring mounting hole, and the other end is fitted on the positioning post.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: the inner lock cylinder includes a rotating shaft and a swing block, the rotating shaft is rotatably installed in the lock body, and the swing block is used to push the actuating piece.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the top of the rotating shaft is provided with a square insertion hole, the bottom of the outer lock cylinder is provided with a square insertion block that cooperates with the inner lock cylinder, and the top of the outer lock cylinder is provided with a key hole that matches the key.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the lock body is composed of a base and a lock cover, which are fixedly connected by bolts, and the front end of the base is provided with an opening for the lock tongue to pass through.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: the lock cover is provided with a first mounting hole for the outer lock cylinder to pass through, and the base is provided with a second mounting hole that rotates with the inner lock cylinder, and the two are positioned opposite each other.

[0011] When unlocking normally, smoothly insert the appropriate key into the keyhole of the outer lock cylinder, and slowly turn it in the direction designed for rotation. This will cause the inner lock cylinder to rotate, and the swing block of the inner lock cylinder will push the actuating plate backward, converting the rotational force into a linear force that drives the bolt to retract. This will cause the bolt to quickly retract into the lock body, thus smoothly opening the door, window, or cover.

[0012] When locking, gently push the object to be locked (door, window, cabinet) to bring the bolt close to the lock seat. Then, use the key to release the inner lock cylinder's restriction on the bolt. The bolt will immediately pop out under the action of the spring and insert into the lock seat. If the distance between the lock and the lock seat does not change, the bolt tip will pop out completely and insert into the lock seat. If the distance between the lock and the lock seat changes due to deformation of the carrier or other reasons, and the remaining gap is insufficient for the bolt to pop out completely, the bolt tip will pop out a suitable length under the action of the spring, allowing it to insert normally into the lock seat and complete the locking operation.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] A spring is installed at the rear end of the latch, which can automatically adjust its length according to actual use, achieving precise fit and ensuring smooth locking, greatly improving the adaptability of the lock. At the same time, the combination of the latch and the spring gives the latch good elastic recovery ability, which can quickly return to its original position after being subjected to external force, ensuring accuracy and stability after multiple uses. It has broad application prospects in many fields such as doors, windows, and cover plates, bringing users a convenient and reliable locking experience. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0017] Figure 3 This is an exploded view of the parts of this utility model;

[0018] Figure 4 This is a cross-sectional view of the protruding locking tongue of this utility model;

[0019] Figure 5 This is a schematic diagram of the retractable locking tongue structure of this utility model;

[0020] Figure 6 This is a schematic diagram of the installation of this utility model under normal conditions;

[0021] Figure 7 This is a schematic diagram of the installation of this utility model under abnormal conditions.

[0022] The components in the diagram are labeled as follows: lock body 1, base 11, lock cover 12, opening 13, first mounting hole 14, second mounting hole 15, positioning pin 16, support plate 17, outer lock cylinder 2, square insert block 21, keyhole 22, inner lock cylinder 3, rotating shaft 31, swing block 32, square insert hole 33, bolt 4, bolt plate 41, connecting rod 42, actuating plate 43, spring mounting hole 44, limit block 45, spring 5, lock seat 6. Detailed Implementation

[0023] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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. They should not be construed as limiting the specific protection scope of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0025] See the attached drawings. The lock with automatically adjustable bolt length described in this embodiment includes a lock body 1, an outer lock cylinder 2, an inner lock cylinder 3, and a bolt 4. The lock body 1 consists of a base 11 and a lock cover 12, which are fixedly connected by bolts. The front end of the base 11 has an opening 13 for the bolt to pass through. The lock cover 12 has a first mounting hole 14 for the outer lock cylinder 2 to pass through, and the base 11 has a second mounting hole 15 that rotatably engages with the inner lock cylinder 3; the two are positioned opposite each other.

[0026] The latch 4 is placed inside the lock body 1. The latch 4 consists of a latch plate 41, a connecting rod 42, and a lever plate 43. The rear end of the latch 4 has a spring mounting hole 44, which extends from the lever plate 43 into the connecting rod 42. The depth of the spring mounting hole 44 is set according to the usage requirements. The rear end of the lock body 1 has a positioning post 16. One end of the spring 5 is fixed in the spring mounting hole 44, and the other end is fitted onto the positioning post 16. The spring 5 abuts against the latch 4 and the rear end of the lock body 1, thereby giving the latch 4 an outward force, driving the latch 4 to pop outward. The rear end of the latch plate 41 has a protruding limiting block 45, which abuts against the opening 13 at the front end of the base 11 to prevent the latch 4 from popping out of the lock body 1 as a whole.

[0027] The base of the lock body 1 has a support plate 17 in the middle. The support plate 17 has an arc-shaped groove for the connecting rod to pass through. The arc-shaped groove provides support for the connecting rod 42, making the extension and retraction of the lock tongue 4 more stable.

[0028] The inner lock cylinder 3 is rotatably installed in the second mounting hole 15 of the base 11. The inner lock cylinder 3 includes a rotating shaft 31 and a swing block 32. The rotating shaft 31 is rotatably engaged with the second mounting hole 15, and a square insertion hole 33 is provided at the top of the rotating shaft 31. The swing block 32 is located between the support plate 17 of the base and the actuating plate 43 of the lock tongue. The swing block 32 can rotate more than 90 degrees (excluding 90 degrees) to push the actuating plate 43 to the rear, so that the lock tongue 4 retracts into the lock body 1.

[0029] The outer lock cylinder 2 is rotatably installed in the first mounting hole 14 of the lock cover 12. The lower part of the outer lock cylinder 2 extends into the lock body, and a square insert 21 matching the square insertion hole 33 on the inner lock cylinder 3 is provided below it, so that when the outer lock cylinder 2 rotates, it can drive the inner lock cylinder 3 to rotate synchronously. The upper part of the outer lock cylinder 2 is provided with a keyhole 22 that matches the key. The keyhole 22 has a special-shaped protrusion, which can only be rotated with the corresponding key.

[0030] When unlocking normally, insert the appropriate key smoothly into the keyhole 22 of the outer lock cylinder 2, and slowly turn it in the rotation direction designed by the key. This will cause the inner lock cylinder 3 to rotate, and the swing block 32 of the inner lock cylinder 3 will rotate backward by more than 90 degrees (excluding 90 degrees). This will push the actuating piece 43, converting the rotational force into a linear force that drives the bolt 4 to retract, so that the bolt 4 will quickly retract into the lock body 1, thereby smoothly opening the door, window or cover.

[0031] When locking, gently push the object to be locked (door, window, cabinet) to bring the bolt 4 close to the lock seat 6 (installed on the other side of the door frame). Then, use the key to release the inner lock cylinder 3 from the bolt 4. The bolt 4 will immediately pop out under the action of the spring 5 and insert into the lock seat 6. If the distance between the lock and the lock seat does not change, the bolt tongue piece 41 at the front end of the bolt 4 will pop out completely and insert into the lock seat 6. If the distance between the lock and the lock seat changes due to deformation of the carrier or other reasons, and the remaining gap is not enough for the bolt 4 to pop out completely, the bolt 4 can pop out a bolt tongue piece 41 of appropriate length under the action of the spring 5, so that it can be inserted normally into the lock seat to complete the locking work.

[0032] Compared to traditional locks, the lock in this embodiment can automatically sense and adapt to deformation and installation errors of the carrier such as doors, windows, and covers. Regardless of structural deviations caused by seasonal changes, long-term use, or accidental impacts, the bolt can automatically adjust its length to ensure precise insertion into the keyhole, effectively avoiding inconvenience and security risks caused by the inability to close properly, and greatly improving the practicality of the lock in complex environments.

[0033] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A lock with automatically adjustable bolt length, comprising a lock body, an outer lock cylinder, an inner lock cylinder, and a bolt, characterized in that: The bolt is placed inside the lock body and consists of a bolt plate, a connecting rod, and a lever plate. A support plate is provided in the middle of the lock body, and the support plate has an arc-shaped groove for the connecting rod to pass through. A spring is provided between the rear end of the bolt and the lock body, and the spring drives the bolt to pop outward. The inner lock cylinder is rotatably installed inside the lock body, located between the support plate and the lever plate. The outer lock cylinder drives the inner lock cylinder to rotate, and the inner lock cylinder can push the lever plate backward, causing the bolt to retract into the lock body.

2. The lock with automatically adjustable bolt length as described in claim 1, characterized in that: The rear end of the connecting rod is provided with a spring mounting hole, and the rear end of the lock body is provided with a positioning post. One end of the spring is fixed in the spring mounting hole, and the other end is fitted onto the positioning post.

3. The lock with automatically adjustable bolt length as described in claim 1, characterized in that: The inner lock cylinder includes a rotating shaft and a swing block. The rotating shaft is rotatably mounted in the lock body, and the swing block is used to push the actuating piece.

4. A lock with automatically adjustable bolt length as described in claim 3, characterized in that: The top of the rotating shaft is provided with a square insertion hole, the bottom of the outer lock cylinder is provided with a square insertion block that cooperates with the inner lock cylinder, and the top of the outer lock cylinder is provided with a key hole that matches the key.

5. A lock with automatically adjustable bolt length as described in claim 1, characterized in that: The lock body consists of a base and a lock cover, which are fixedly connected by bolts. The front end of the base has an opening for the lock tongue to pass through.

6. A lock with automatically adjustable bolt length as described in claim 5, characterized in that: The lock cover has a first mounting hole for the outer lock cylinder to pass through, and the base has a second mounting hole for the inner lock cylinder to rotate and cooperate with it. The two are positioned opposite each other.

Images