An adjustable length lock cylinder

Abstract

This utility model relates to the field of lock cylinder technology, and in particular to an adjustable length lock cylinder installed inside a lock shell. The lock shell consists of a main lock shell and a secondary lock shell. A lock head is rotatably connected to the bottom of the main lock shell. Lock cylinders are rotatably connected inside the opposite ends of the main lock shell and the secondary lock shell. The lock cylinder is locked to the lock shell by a locking structure and connected to the lock head by a limiting structure. The opposite ends of the main lock shell and the secondary lock shell are slidably connected by a guide member and fixed by a fixing component. In this utility model, the main shell and the secondary shell slide under the guidance of the guide member, and the length can be adjusted according to the actual needs. After the length is adjusted, the elastic support force of the compression spring drives the pressing member and the fixing member to reset. The plug on the fixing member is movably inserted into the plug hole to fix the guide member.

Description

Technical Field

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

[0002] The lock cylinder is the most core and crucial component of the entire lock system. The vast majority of locks are pin tumbler locks. When the correct key is inserted, the different teeth on the key will push the corresponding lower pins to the precise height. At this time, the tops of all the lower pins and the bottoms of all the upper pins will be perfectly aligned in a straight line. This line will completely coincide with the gap between the lock cylinder body and the outer shell, allowing the lock cylinder to be turned to unlock.

[0003] Considering that door panels of different thicknesses require lock cylinders of different lengths, the length of the lock cylinder can be adjusted within a certain range through an adjustable structure. For example, Chinese Patent Publication No. CN119737086A discloses an adjustable length lock cylinder. The main improvement is that a sliding hole is provided at one end of the lock head on the same side as the keyhole. The sliding hole is recessed downwards from the top wall of the lock head, and an adjustable length lock shell extension is slidably connected in the sliding hole. The lock shell extension includes a slide rail and a lock shell portion. The slide rail is slidably connected in the sliding hole and fixed by a locking device. At least one extended cylinder portion is connected between the lock housing and the keyhole. The extended cylinder portion includes a through hole for inserting a key, which runs through the middle of the extended cylinder portion from front to back. The extended cylinder portion also includes an inner groove on its right side, which encloses and positions the end of the keyhole exposed in the cylinder portion. A limiting block is provided in the inner groove to lock the upper end of the keyhole. The extended cylinder portion also includes a boss that is connected to the lock housing portion for limiting the key. The boss extends outward and is exposed in the lock housing portion for key insertion. Two extended cylinder portions can be connected end to end through the inner groove and the limiting block.

[0004] In practice, the length of the two lock housings is adjusted by sliding the extension section. After adjustment, they need to be fixed with bolts. However, considering that bolt fixing requires tools and the bolts need to be turned repeatedly when adjusting the two lock housings, the installation efficiency is affected. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of the existing technology, namely the slow efficiency of length adjustment between the two lock shells, and to propose an adjustable length lock cylinder.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design an adjustable length lock cylinder, installed inside a lock shell, the lock shell consisting of a main lock shell and a secondary lock shell, a lock head rotatably connected to the bottom of the main lock shell, and lock cylinders rotatably connected inside the opposite ends of the main lock shell and the secondary lock shell, the lock cylinders being locked to the lock shell by a locking structure and connected to the lock head by a limiting structure;

[0008] The main lock housing and the secondary lock housing are slidably connected at their opposite ends by a guide member and fixed together by a fixing component.

[0009] Furthermore, the limiting structure includes a limiting sleeve and a fixing sleeve, wherein the limiting sleeve and the fixing sleeve are disposed inside and outside each other and are slidably connected through a limiting part;

[0010] The limiting sleeve and the fixing sleeve are respectively fixedly connected to the secondary lock shell and the main lock shell, and the limiting sleeve and the fixing sleeve are both provided with recessed grooves at opposite ends.

[0011] Furthermore, the fixed sleeve has a guide portion on its periphery, the lock head is sleeved on the periphery of the fixed sleeve, and the lock head has a limiting groove on the inner wall of the shaft hole that is adapted to the guide portion.

[0012] Furthermore, the main lock housing and the secondary lock housing are provided with guide grooves on their outer walls, the guide member is fixedly connected to the secondary lock housing, and the free end of the guide member is slidably connected in the guide groove on the periphery of the main lock housing.

[0013] Furthermore, the main lock housing has corresponding stepped grooves and receiving grooves on both sides of the outer wall, and the stepped grooves and the receiving grooves are connected by a shaft hole located below the guide groove.

[0014] Furthermore, the fixing component includes a pressing member and a fixing member, the pressing member and the fixing member being slidably connected in the stepped groove and the receiving groove respectively, and the pressing member and the fixing member being fixedly connected by a shaft.

[0015] A compression spring is fitted around the outer periphery of the shaft within the stepped groove.

[0016] Furthermore, the guide member has several insertion holes evenly distributed along the length direction on the periphery of its free end, and the fixing member has an insertion rod on its side, which passes through the main lock housing and is movably inserted into the insertion holes.

[0017] The present invention proposes an adjustable length lock cylinder, which has the following advantages: In the present invention, the main housing and the secondary housing slide under the guidance of the guide member, and the length can be adjusted according to the actual needs. At the same time as the sliding adjustment, the limiting sleeve and the fixed sleeve slide synchronously with the guide part to prevent the length adjustment from causing a lock cylinder to disconnect from the lock head.

[0018] After the length adjustment is completed, the elastic support force of the compression spring drives the pressing and fixing parts to reset. The plug on the fixing part is movably inserted into the plug hole, which can fix the guide part. This allows for quick adjustment and fixation between the main housing and the sub-housing, which helps to improve installation efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is an exploded view of the present invention;

[0021] Figure 3 This is a schematic diagram of the limiting structure of this utility model;

[0022] Figure 4 This is a cross-sectional view of the fixing component of this utility model;

[0023] Figure 5 for Figure 4 A magnified structural diagram of area A.

[0024] In the diagram: 1. Main lock housing; 11. Stepped groove; 12. Receiving groove; 2. Secondary lock housing; 3. Lock head; 4. Lock cylinder; 5. Locking structure; 6. Limiting structure; 61. Limiting sleeve; 62. Fixing sleeve; 63. Limiting part; 64. Guide part; 65. Recessed groove; 7. Guide component; 8. Fixing component; 81. Pressing component; 82. Fixing component; 83. Shaft; 84. Compression spring; 85. Insertion hole; 86. Insert rod; 9. Guide groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figure 1-5 An adjustable length lock cylinder is installed inside a lock shell, which consists of a main lock shell 1 and a secondary lock shell 2. A lock head 3 is rotatably connected to the bottom of the main lock shell 1. Lock cylinders 4 are rotatably connected inside the opposite ends of the main lock shell 1 and the secondary lock shell 2. The lock cylinder 4 is locked to the lock shell by a locking structure 5 and connected to the lock head 3 by a limiting structure 6.

[0027] The main lock housing 1 and the secondary lock housing 2 are slidably connected by a guide 7 and fixed by a fixing component 8.

[0028] In some embodiments, such as Figure 2As shown, the locking structure 5 is a double-row pin tumbler locking structure inside the lock in the prior art. The specific principle is that by using several pins of different lengths in two rows, under the action of the correct key tooth height, the dividing line of the pins is aligned with the lock cylinder, thereby unlocking the lock. The technical means are common knowledge to those in the field and will not be elaborated here.

[0029] Furthermore, the limiting structure 6 includes a limiting sleeve 61 and a fixing sleeve 62, wherein the limiting sleeve 61 and the fixing sleeve 62 are disposed inside and outside each other and are slidably connected by a limiting part 63.

[0030] The limiting sleeve 61 and the fixing sleeve 62 are respectively fixedly connected to the secondary lock shell 2 and the main lock shell 1, and the limiting sleeve 61 and the fixing sleeve 62 are both provided with recessed grooves 65 at opposite ends.

[0031] Furthermore, the fixed sleeve 62 has a guide portion 64 on its periphery, and the lock head 3 is sleeved on the periphery of the fixed sleeve 62. The lock head 3 has a limiting groove on the inner wall of the shaft hole that is adapted to the guide portion 64.

[0032] In this embodiment, as Figure 2 As shown, the guide part 64 includes a guide protrusion and a guide groove. The fixed sleeve 62 is provided with a guide protrusion (not shown) on the inner wall of the shaft hole. The periphery of the limiting sleeve 61 is provided with a guide groove. The guide groove is slidably connected to the guide protrusion, thereby circumferentially locking the limiting sleeve 61 and the fixed sleeve 62.

[0033] Specifically, the limiting sleeve 61 and the fixing sleeve 62 are limited and slid by the guide part 64 to prevent the lock cylinder 4 at one end from being disconnected from the lock head 3 when the length of the main lock shell 1 and the auxiliary lock shell 2 is adjusted. A recessed groove 65 is provided to accommodate the front end of the key. After the matching key is inserted into the lock cylinder 4, it is engaged in the recessed groove 65. Rotating the key will drive the lock cylinder 4, the limiting sleeve 61 and the fixing sleeve 62 and the lock head 3 to rotate, thereby unlocking the lock.

[0034] More specifically, the main lock housing 1 and the secondary lock housing 2 are provided with guide grooves 9 on their outer walls, the guide member 7 is fixedly connected to the secondary lock housing 2, and the free end of the guide member 7 is slidably connected in the guide groove 9 on the periphery of the main lock housing 1.

[0035] In general, the main lock housing 1 has corresponding stepped grooves 11 and receiving grooves 12 on both sides of the outer wall. The stepped grooves 11 and the receiving grooves 12 are connected by a shaft hole below the guide groove 9.

[0036] Furthermore, the fixing component 8 includes a pressing member 81 and a fixing member 82, which are slidably connected in the stepped groove 11 and the receiving groove 12, respectively, and the pressing member 81 and the fixing member 82 are fixedly connected by a shaft 83.

[0037] A compression spring 84 is fitted around the outer periphery of the shaft 83 within the stepped groove 11.

[0038] Finally, the guide member 7 has several insertion holes 85 evenly distributed along the length direction on the periphery of the free end, and the fixing member 82 has an insertion rod 86 on its side. The insertion rod 86 passes through the main lock shell 1 and is movably inserted into the insertion hole 85.

[0039] In this embodiment, as Figure 5 As shown, the two ends of the compression spring 84 abut against the inner wall of the stepped groove 11 and the side wall of the pressing member 81, respectively. The compression spring 84 is used to provide elastic support for the pressing member 81, thereby driving the insertion rod 86 to be inserted into the insertion hole 85. Then, because the guide member 7 is fixedly connected to the secondary lock shell 2, the guide member 7 is fixed in the guide groove 9 of the main lock shell 1, so that the length between the two lock shells can be adjusted and fixed.

[0040] It is worth mentioning that the insertion stroke of the insertion rod 86 is adapted to the pressing stroke of the pressing member 81 to prevent the pressing member 81 from failing to drive the insertion rod 86 out of the insertion hole 85.

[0041] Working method: Pressing the pressing part 81 and the fixing part 82 will drive them to move in the direction of force. At this time, the insertion rod 86 will disengage from the insertion hole 85 and the guide part 7 will unlock. Then, the sliding secondary lock shell 2 will adjust the length between the two lock shells.

[0042] Once the length is fixed, the compression spring 84 provides elastic support to the pressing member 81, which in turn drives the insertion rod 86 to be inserted into the insertion hole 85, thereby adjusting and fixing the length between the two lock shells.

[0043] While the main lock shell 1 and the secondary lock shell 2 slide, the fixed sleeve 62 and the limiting sleeve 61 slide synchronously through the guide part 64. When the matching key is inserted into the lock cylinder 4 and engaged in the recessed groove 65, the lock cylinder 4, the limiting sleeve 61, the fixed sleeve 62 and the lock head 3 can be rotated by the key to unlock the lock.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An adjustable length lock cylinder mounted within the interior of a lock housing, characterized by: The lock housing consists of a main lock housing (1) and a secondary lock housing (2). A lock head (3) is rotatably connected to the bottom of the main lock housing (1). Lock cylinders (4) are rotatably connected inside the opposite ends of the main lock housing (1) and the secondary lock housing (2). The lock cylinders (4) are locked to the lock housing through a locking structure (5) and connected to the lock head (3) through a limiting structure (6). The main lock housing (1) and the secondary lock housing (2) are slidably connected by a guide (7) and fixed by a fixing component (8).

2. A length-adjustable lock cylinder according to claim 1, characterized in that: The limiting structure (6) includes a limiting sleeve (61) and a fixing sleeve (62), wherein the limiting sleeve (61) and the fixing sleeve (62) are disposed inside and outside each other and are slidably connected by a limiting part (63); The limiting sleeve (61) and the fixing sleeve (62) are fixedly connected to the secondary lock shell (2) and the main lock shell (1) respectively, and the limiting sleeve (61) and the fixing sleeve (62) are both provided with recessed grooves (65) at opposite ends.

3. The adjustable length lock cylinder according to claim 2, characterized in that: The fixed sleeve (62) has a guide portion (64) on its periphery, and the lock head (3) is sleeved on the periphery of the fixed sleeve (62). The lock head (3) has a limiting groove on the inner wall of the shaft hole that is adapted to the guide portion (64).

4. The adjustable length lock cylinder according to claim 1, characterized in that: The main lock shell (1) and the secondary lock shell (2) are provided with guide grooves (9) on their outer walls. The guide member (7) is fixedly connected to the secondary lock shell (2), and the free end of the guide member (7) is slidably connected in the guide groove (9) on the periphery of the main lock shell (1).

5. The adjustable length lock cylinder according to claim 4, characterized in that: The main lock housing (1) has corresponding stepped grooves (11) and receiving grooves (12) on both sides of the outer wall. The stepped grooves (11) and the receiving grooves (12) are connected by a shaft hole below the guide groove (9).

6. The adjustable length lock cylinder according to claim 5, characterized in that: The fixing component (8) includes a pressing member (81) and a fixing member (82). The pressing member (81) and the fixing member (82) are slidably connected in the stepped groove (11) and the receiving groove (12) respectively. The pressing member (81) and the fixing member (82) are fixedly connected by a shaft (83). Among them, the outer periphery of the shaft (83) is fitted with a compression spring (84) inside the stepped groove (11).

7. The adjustable length lock cylinder according to claim 6, characterized in that: The guide member (7) has several holes (85) evenly distributed along the length direction on the periphery of the free end. The fixing member (82) has a plug rod (86) on its side. The plug rod (86) passes through the main lock shell (1) and is movably inserted into the holes (85).

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