Lock cylinder with adjustable length

Abstract

The invention relates to a length-adjustable lock cylinder which is mainly characterized in that a sliding hole is formed in one end, on the same side as a key hole, of a lock head part, the top wall of the lock head part is concavely arranged downwards to form the sliding hole, a length-adjustable lock shell lengthening part is slidably connected into the sliding hole, and the lock shell lengthening part comprises a sliding rail and a lock shell part; the sliding rail is connected into the sliding hole in a sliding mode and fixed through a locking device, at least one lock cylinder lengthening part is connected between the lock shell part and the key hole, the lock cylinder lengthening part comprises a through hole which is formed in the middle of the lock cylinder lengthening part in a front-back penetrating mode and allows a key to be disassembled, and the lock cylinder lengthening part further comprises an inner groove formed in the right side of the lock cylinder lengthening part. The inner groove wraps and positions the end, exposed out of the lock cylinder part, of the key hole, a limiting block clamped into the upper end of the key hole for limiting is arranged in the inner groove, the lock cylinder lengthening part further comprises a boss connected to the interior of the lock shell part in a limiting mode, and the boss extends outwards and is exposed out of the lock shell part so that a key can be inserted into the boss. The two lock liner lengthening parts can be connected end to end through the inner grooves and the limiting blocks.

Description

Technical Field

[0001] The invention relates to the field of lock cores, and in particular to a lock core with adjustable length. Background Art

[0002] With the changes in market demand and the advancement of technology, the design of locks is also constantly innovating, especially in the field of adjustable length lock cores. The traditional lock core has a fixed length and it is difficult to meet the needs of different application scenarios. In order to solve this problem, some lock core designs with adjustable length have appeared on the market.

[0003] The CN218668909U Chinese utility model patent published on March 21, 2023 discloses a lock core with adjustable length, including a front lock body, a rear lock body, a dial head and an extension component, wherein the extension component includes a plurality of extension plugs, the extension plugs are arranged between the front lock body and the dial head and / or between the rear lock body and the dial head, and also includes a rotating shaft, the extension plug is installed on the rotating shaft, and the rotating shaft is formed by connecting a plurality of fillers, the fillers are arranged between the front lock gall of the front lock body and the dial head and / or between the rear lock gall of the rear lock body and the dial head, and the number of the fillers is adapted to the number of the extension plugs. The length of the lock core is adjusted so that the lock core is adapted to applications in different scenarios. And the rotating shaft is formed by connecting a plurality of fillers, replacing the fixed length of the existing rotating shaft, so as to adapt to the setting of different numbers of extension plugs, and also by setting a corresponding number of fillers to adapt, so as to facilitate the adjustment of the length of the lock core.

[0004] The lock core of the above structure is divided into a front lock body and a rear lock body. The length of the lock core is adjusted by inserting an extension component between the front lock body and the rear lock body. On the one hand, this structure is more complicated and has a high production cost. On the other hand, it is not convenient to install or replace. Each time, the lock core needs to be disassembled and the extension component needs to be replaced. On the other hand, the lock core is easily damaged during multiple replacements, which affects the life of the lock core. In addition, when adjusting the length, multiple extension components may be added, which not only affects the appearance, but also affects the firmness of the lock core. Therefore, the structure of the adjustable length lock core in the prior art needs to be further improved.

[0005] The Chinese utility model patent CN222207499U published on December 20, 2024 discloses a lock core with adjustable length, including a lock core body, the lock core body including a lock shell, a lock core and a lock core rotating shaft, the lock core has a keyhole for inserting a key, the lock core rotating shaft has a connecting mechanism for manual or electric unlocking, the lock core also includes a first lock shell extension and a lock core extension, the first lock shell extension and the lock core extension are detachably arranged on a portion of the lock core body for inserting a key The lock core of the lock core body is provided with a first fixing part for fixing the first lock core extension part, the first fixing part includes a fixing groove and a fixing hole, the first lock core extension part is provided with a plug-in matched with the fixing groove and a fixing column matched with the fixing hole; the lock core at one end of the lock core body for inserting a key is provided with a concave hole for fixing the lock core extension part, the lock core extension part is provided with a convex column matched with the concave hole, and the first lock shell extension part is provided with a mounting hole for placing the lock core extension part.

[0006] Although the above-mentioned prior art discloses that the extension component is arranged at one or both ends of the lock core body relative to the prior art, when adjusting the length, it is only necessary to add or replace a longer or shorter extension component without disassembling the lock core, which is more convenient than the technical solution disclosed in the first patent. However, its structure is fixed and the length adjustment is fixed, which cannot meet the needs of adjusting lock cores of different lengths. Moreover, its lock core adjustment component has a simple structure. Specifically, the extension part of the lock shell is limitedly matched with the fixing groove and the fixing hole respectively through the plug-in and the fixing column. This limited matching is easy to cause the extension component to loosen and dislocate during long-term use of the lock, making it impossible to unlock, which poses certain safety hazards.

[0007] Therefore, how to overcome the above-mentioned defects and provide a lock core with convenient adjustment of lock core length and good structural stability has become an important issue to be solved urgently by those skilled in the art. Summary of the invention

[0008] The present invention overcomes the shortcomings of the above-mentioned technology and provides a lock core with adjustable length.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] A lock core with adjustable length comprises a main lock body, wherein the main lock body comprises a lock core part and a lock head part, wherein a keyhole for inserting a key is provided at one end of the lock core part, and a sliding hole is provided at one end of the lock head part on the same side as the keyhole, wherein the sliding hole is recessed downward from the top wall of the lock head part, wherein an adjustable length lock shell extension part is slidably connected in the sliding hole, wherein the lock shell extension part comprises a sliding rail and a lock shell part, wherein the sliding rail is slidably connected in the sliding hole and is fixed by a locking device, wherein at least one lock core extension part is connected between the lock shell part and the keyhole, The lock core extension part includes a through hole for the key to be inserted and is arranged along the front and back of the middle part of the lock core extension part. The lock core extension part also includes an inner groove opened on the right side thereof, and the inner groove wraps and positions the end of the keyhole exposed from the lock core part. A limit block is arranged in the inner groove, which is inserted into the upper end of the keyhole to limit the position. The lock core extension part also includes a boss connected to the lock shell part in a limiting manner. The boss extends outward and is exposed from the lock shell part for the key to be inserted. The two lock core extension parts can be connected end to end through the inner groove and the limit block.

[0011] Furthermore, the locking device includes a first screw hole opened at the right end of the sliding hole, a plurality of second screw holes opened on the sliding rail, and a bolt that passes through the second screw hole from top to bottom and is inserted into the first screw hole for connection and fixing. After the bolt is completely inserted into the second screw hole and the first screw hole, its upper wall surface is lower than the second screw hole.

[0012] Furthermore, the distance between the axes of two adjacent second screw holes is 5-10 mm.

[0013] Furthermore, the slide rail includes a positioning block arranged at its left end, and a positioning groove for inserting the positioning block is recessed on the left side wall of the slide hole.

[0014] Furthermore, a length indication mark is provided on the side wall of the slide rail.

[0015] Furthermore, the length of the extended portion of the locking core is 5mm-30mm.

[0016] Furthermore, a barrier sheet is provided at the bottom of the sliding hole for isolating the sliding hole from the internal structure of the main lock body.

[0017] Furthermore, a first anti-drill pin is symmetrically arranged on the front and rear side walls on the left side of the sliding hole, a second anti-drill pin is symmetrically arranged on the front and rear side walls on the right side of the sliding hole, and a third anti-drill pin is arranged at the bottom of the lock head part close to the lock core part, and the third anti-drill pin is arranged close to the keyhole on the right side.

[0018] Furthermore, the other end of the main lock body laterally away from the keyhole is provided with a first connecting portion and a second connecting portion for manual or electric unlocking.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This case realizes non-destructive length adjustment by setting the design of sliding hole and slide rail, and the sliding connection between the two realizes non-destructive length adjustment. Users can complete the adjustment without disassembling the entire lock core. This design not only simplifies the installation process, but also improves work efficiency. It is particularly suitable for situations that require frequent adjustments or on-site installation. This case can fix the slide rail at any desired position to ensure that the length of the lock core remains stable after adjustment, avoiding the wear and instability caused by multiple disassembly and assembly in traditional methods. The detachable design of the lock shell extension and the lock cylinder extension of this case allows users to quickly replace extension parts of different lengths according to actual needs, and can also adjust the different lengths of the lock core of this case by stacking multiple lock cylinder extensions end to end, which greatly improves the applicability and maintenance convenience of the product, so that the same lock core can adapt to a variety of different application scenarios and reduce inventory management costs. The lock cylinder extension of this case is designed to be connected end to end with a through hole and a boss. Even after adding the lock cylinder extension, users can still easily insert the key without affecting the user experience, while ensuring the smooth unlocking action. The precise positioning of the inner groove of the lock cylinder extension and the stop block ensures that the lock cylinder extension can be accurately installed in the correct position and remain stable, reducing the risk of loosening during long-term use. This not only improves the safety performance of the lock cylinder, but also extends its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall disassembly of the length-adjustable lock cylinder in this case.

[0022] Figure 2 This is a schematic diagram of the structure of the lock core extension parts of two different sizes in this case.

[0023] Figure 3 It is a structural diagram of the main lock body in this case.

[0024] Figure 4 It is a side view of the assembled state of the adjustable length lock cylinder of this case.

[0025] Figure 5 This case Figure 4 Section view in the AA direction.

[0026] Figure 6 It is a three-dimensional diagram of the assembled state of the adjustable length lock cylinder of this case. DETAILED DESCRIPTION

[0027] The features of the present invention and other related features are further described in detail below through embodiments to facilitate understanding by those skilled in the art:

[0028] like Figures 1 to 6As shown, the present invention provides a lock core with adjustable length, including a main lock body 1, and the main lock body 1 includes a lock core part 11 and a lock head part 12. In specific implementation, the main lock body is usually made of high-strength materials to ensure its durability and safety. The lock core part 11 is the core part of the lock core, and contains a specific lock core and lock core structure inside, so as to realize the unlocking operation by key or mechanical means. The lock head part 12 provides a connection point and a support structure, allowing the installation of additional length adjustment components and ensuring that these components can be firmly fixed on the main lock body. A keyhole 111 for inserting a key is provided at one end of the lock core part 11, so as to facilitate the user to unlock the lock with a key. A sliding hole 121 is provided at one end of the lock head part 12 on the same side as the keyhole 111. The sliding hole 121 is recessed downward from the top wall of the lock head part 12, and an adjustable length lock shell extension part 3 is slidably connected in the sliding hole 121. The lock shell extension 3 includes a slide rail 31 and a lock shell part 32. The slide rail 31 is slidably connected to the slide hole 121 and fixed by a locking device. The sliding cooperation between the slide hole 121 and the slide rail 31 facilitates the user to adjust the position of the lock shell extension 3 as needed, and then fix it at the desired position through the locking device. While facilitating adjustment, the connection is more stable, which improves the stability and durability of the overall structure of the adjustable lock core of this case. This allows the overall length of the lock core to be flexibly adjusted according to the requirements of the installation environment and has a wide range of uses. The matching design of the slide hole 121 and the slide rail 31 allows the length of the lock core to be flexibly adjusted without disassembling the entire lock core, which simplifies the installation process and improves work efficiency. At least one lock core extension 4 is connected between the lock shell part 32 and the keyhole 111. The lock shell part 32 serves as an external protective layer and provides an installation platform for the lock core extension 4 and other internal components. In specific implementation, the user can adjust the length of the slide rail 31 in the slide hole 121 as needed to choose to increase or decrease the number of the lock core extension 4, so as to adjust the overall length of the lock core of this case. The lock core extension 4 includes a through hole 41 for key insertion arranged along the middle of the lock core extension 4, and the through hole 41 maintains the integrity of the key path inside the lock core and does not affect the normal key unlocking action. The lock core extension 4 also includes an inner groove 42 opened on the right side thereof, and the inner groove 42 wraps and positions the end of the key hole 111 exposed to the lock core part 11, and a limit block 43 is provided in the inner groove 42 to be stuck in the upper end of the key hole 111 to limit the position, and the lock core extension 4 also includes a boss 44 connected to the lock shell part 32, and the boss 44 extends outward and is exposed to the lock shell part 32 for key insertion. The two lock core extensions 4 can be connected end to end through the inner groove 42 and the limit block 43. The design of the inner groove 42 and the limit block 43 greatly improves the stability of the lock core extension part 4 after installation with the main lock body 1 and the lock shell part 32, as well as the stability of the lock core extension parts 4 after installation with each other, reducing the risk of loosening during long-term use.The setting of the boss 44 facilitates the better installation of the lock core extension 4 on the lock shell 32, and plays a limiting role, so that the connection between the two is more stable, and at the same time, the user can still insert the key conveniently without affecting the user experience. Secondly, the setting of the boss 44 facilitates the end-to-end matching of the two adjacent lock core extensions 4 with the inner groove 42 and the limit block 43, and the precise connection makes the connection more stable. The modular design of the lock core extension 4 in this case allows the lock core extension 4 of different lengths to be quickly replaced according to actual needs, which improves the applicability and maintenance convenience of the product. In specific implementation, the lock shell extension 3 and the lock core extension 4 are made of sturdy and durable materials, such as metal materials such as zinc alloy and copper, to enhance the strength and durability of the overall structure and effectively resist the influence of external shocks and environmental factors. In this case, in order to save costs and achieve a sturdy and durable effect, the lock shell extension 3 and the lock core extension 4 in this case are made of copper material.

[0029] It should be noted that the fixing groove and fixing hole of CN222207499U in the background technology are set on the side wall of the main lock body, while the sliding hole 121 of this case is formed by being recessed from the top of the lock head 12. This design is not easy to cause damage to the internal components of the lock core during the production process, and leaves more space for other internal components (such as electronic components, mechanical transmission components), etc., which helps to optimize the internal structure layout and improve the overall performance. At the same time, the design of the top sliding hole allows the user to adjust the length directly from the top without going around the side or bottom, simplifying the installation and adjustment process. The top sliding hole 121 will not destroy the integrity and aesthetics of the side of the lock body, making the product look neater and more professional. The processing of the top sliding hole 121 is relatively simple, reducing the need for complex molds; at the same time, it is also easier to position and fix the slide rail 31 during the assembly process, reducing the difficulty and cost of production.

[0030] Specifically, Figure 1 , Figure 3 , Figure 5 , Figure 6 As shown, the locking device includes a first screw hole 122 opened at the right end of the slide hole 121, a plurality of second screw holes 311 opened on the slide rail 31, and a bolt 5 that passes through the second screw hole 311 from top to bottom and penetrates into the first screw hole 122 to connect and fix. The plurality of second screw holes 311 provide flexible adjustment options to ensure that the user can accurately set the length of the lock core according to actual needs. The close fit of the bolt 5, the first screw hole 122 and the second screw hole 311 ensures the stability of the connection between the slide rail 31 and the main lock body 1 after adjustment to prevent sliding and loosening. This bolt connection method has a simple structure, convenient operation and low cost. When the bolt 5 is completely inserted into the second screw hole 311 and the first screw hole 122, its upper wall surface is lower than the second screw hole 311, that is, the bolt 5 is completely sunk into the second screw hole 311, which not only improves the aesthetics, but also enhances the safety and durability of the system.

[0031] Furthermore, the distance between the axes of two adjacent second screw holes 311 is 5-10 mm. The 5-10 mm spacing allows the user to make more precise length adjustments, ensuring that the lock core can accurately adapt to various installation sizes. Preferably, in this case, considering the cost and the user's demand for an increase in the overall length of the lock core, the distance between the axes of two adjacent second screw holes 311 is 5 mm. It should be noted that the distance between the axes of two adjacent second screw holes 311 can also be 10 mm, etc.

[0032] Furthermore, if Figure 1 , Figure 3 , Figure 5 , Figure 6 As shown, the slide rail 31 includes a positioning block 312 disposed at its left end, and a positioning groove 123 for inserting the positioning block 312 is recessed on the left wall of the slide hole 121. In this embodiment, when the user does not need to add the lock core extension part 4, the positioning block 312 is completely embedded in the positioning groove 123 to ensure the stability of the connection between the slide rail 31 and the main lock body 1. Moreover, the two structures are connected as one from the outside, the structure is complete and stable, and more beautiful. At this time, the lock core of this case is in an unextended state to meet the length requirements of ordinary lock cores, but the thickness of the lock shell part 32 needs to be set thinner to fit closely with the main lock body 1 without affecting the length.

[0033] Furthermore, if Figure 1 , Figure 6 As shown, in order to facilitate the user to more intuitively and accurately adjust to the required length, a length indicator 313 is also provided on the side wall of the slide rail 31. In specific implementation, the length indicator is a scale that clearly marks different length positions.

[0034] Furthermore, the length of the lock core extension part 4 is 5mm-30mm. In the present case, taking into account the cost and the user's demand for an increase in the overall length of the lock core, and at the same time facilitating coordination with the distance between the axes of the second screw hole 311, the length of the lock core extension part 4 is preferably set to 5mm. It should be noted that the length of the lock core extension part 4 can also be 10mm, 15mm, 20mm, etc. Different lengths of lock core extension parts 4 can meet the needs of a variety of installation environments and enhance the applicability of the product. Multiple lock core extension parts 4 can be further increased in length by connecting end to end, coordinating the sliding of the slide rail 31 relative to the slide hole 121, and coordinating the locking of the locking device to achieve adjustment of different length amplitudes.

[0035] like Figure 1 , Figure 3 , Figure 5 , Figure 6As shown, a barrier sheet 6 is provided at the bottom of the slide hole 121 to isolate the slide hole 121 from the internal structure of the main lock body 1. The barrier sheet 6 prevents external dust, moisture, etc. from entering the main lock body 1, protects the internal components from pollution, enhances the sealing performance, and improves the waterproof and dustproof protection capabilities of the lock core.

[0036] like Figure 1 , Figure 3 , Figure 5 , Figure 6 As shown, the first anti-drill pin 7 is symmetrically arranged on the front and rear side walls on the left side of the slide hole 121, and the second anti-drill pin 8 is symmetrically arranged on the front and rear side walls on the right side of the slide hole 121. The third anti-drill pin 9 is arranged at the bottom of the lock head 12 near the lock core 11, and the third anti-drill pin 9 is arranged close to the keyhole 111 on the right side. The first anti-drill pin 7, the second anti-drill pin 8 and the third anti-drill pin 9 provide physical barriers from different angles, forming a multi-level protection system, which greatly increases the difficulty of illegal intrusion. The first anti-drill pin 7, the second anti-drill pin 8 and the third anti-drill pin 9 work together to protect the most sensitive area of ​​the lock core, block the intrusion of tools such as drill bits, and greatly improve the overall safety of the lock core.

[0037] like Figure 1 , Figure 3 , Figure 5 , Figure 6 As shown, the other end of the main lock body 1, which is laterally away from the keyhole 111, is provided with a first connection part 13 and a second connection part 14 for manual or electric unlocking. The design of the first connection part 13 and the second connection part 14 enables the lock core of this case to support both manual unlocking and electric unlocking, meeting the needs of different scenarios. Whether it is the application scenario of traditional mechanical locks or modern smart locks, this design can provide a suitable solution and expand the market coverage of the product.

[0038] As mentioned above, this case protects a lock core with adjustable length, and all technical solutions that are the same or similar to this case should be shown to fall within the scope of protection of this case.

Claims

1. A lock core with adjustable length, comprising a main lock body (1), wherein the main lock body (1) comprises a lock core part (11) and a lock head part (12), wherein one end of the lock core part (11) is provided with a key hole (111) for inserting a key, and wherein: A sliding hole (121) is provided at one end of the lock head (12) on the same side as the keyhole (111), and the sliding hole (121) is recessed downward from the top wall of the lock head (12). A lock shell extension part (3) with adjustable length is slidably connected in the sliding hole (121), and the lock shell extension part (3) includes a sliding rail (31) and a lock shell part (32). The sliding rail (31) is slidably connected in the sliding hole (121) and is fixed by a locking device. At least one lock core extension part (4) is connected between the lock shell part (32) and the keyhole (111), and the lock core extension part (4) includes a supply rail (31) provided along the middle part of the lock core extension part (4) and extending from front to back. The through hole (41) for the key to be inserted, the lock core extension part (4) also includes an inner groove (42) opened on the right side thereof, the inner groove (42) wraps and positions the end of the key hole (111) exposed from the lock core part (11), and a limit block (43) is provided in the inner groove (42) for being inserted into the upper end of the key hole (111) to limit the position, the lock core extension part (4) also includes a boss (44) connected to the lock shell part (32) for limiting the position, the boss (44) extends outward and is exposed from the lock shell part (32) for key insertion, and the two lock core extension parts (4) can be connected end to end through the inner groove (42) and the limit block (43).

2. The length-adjustable lock cylinder according to claim 1, characterized in that: The locking device comprises a first screw hole (122) opened at the right end of the sliding hole (121), a plurality of second screw holes (311) opened on the sliding rail (31), and a bolt (5) passing through the second screw hole (311) from top to bottom and entering the first screw hole (122) for connection and fixing; after the bolt (5) is completely inserted into the second screw hole (311) and the first screw hole (122), the upper wall surface thereof is lower than the second screw hole (311).

3. The length-adjustable lock core according to claim 2, characterized in that: The distance between the axial centers of two adjacent second screw holes (311) is 5-10 mm.

4. The length-adjustable lock cylinder according to claim 1, characterized in that: The slide rail (31) comprises a positioning block (312) arranged at its left end, and a positioning groove (123) for inserting the positioning block (312) is recessed on the left side wall of the slide hole (121).

5. The length-adjustable lock cylinder according to claim 1, characterized in that: A length indication mark (313) is also provided on the side wall of the slide rail (31).

6. A lock core with adjustable length according to any one of claims 1 or 3, characterized in that: The length of the locking gallbladder extension part (4) is 5mm-30mm.

7. A lock core with adjustable length according to any one of claims 1 to 5, characterized in that: A barrier sheet (6) is provided at the bottom of the sliding hole (121) for isolating the sliding hole (121) from the internal structure of the main lock body (1).

8. A lock core with adjustable length according to any one of claims 1 to 5, characterized in that: A first anti-drilling pin (7) is symmetrically arranged on the front and rear side walls on the left side of the sliding hole (121), a second anti-drilling pin (8) is symmetrically arranged on the front and rear side walls on the right side of the sliding hole (121), and a third anti-drilling pin (9) is arranged at a position close to the lock core part (11) at the bottom of the lock head part (12), and the third anti-drilling pin (9) is arranged close to the keyhole (111) on the right side.

9. A lock core with adjustable length according to any one of claims 1 to 5, characterized in that: The other end of the main lock body (1) which is laterally away from the key hole (111) is provided with a first connecting portion (13) and a second connecting portion (14) for manual or electric unlocking.

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