A blade and pin tumbler combined lock cylinder structure

Abstract

This utility model relates to the field of lock technology, specifically to a composite lock cylinder structure of blades and pins, including a lock body and a key. The lock body is equipped with a composite lock assembly, which includes a lock cylinder rotatably connected to the lock body. Multiple blade groups are slidably disposed on the lock cylinder, and a bolt is slidably connected to the lock cylinder. The lock body also has a free-spinning assembly, which is fixedly connected to the lock block. The free-spinning assembly has a free-spinning position and an unlocking position: when in the free-spinning position, the assembly abuts against the outer surface of the lock cylinder, allowing the lock cylinder to rotate freely under the influence of the key; when in the unlocking position, the assembly extends into the lock cylinder and abuts against the bolt, allowing the lock cylinder to rotate the lock block under the influence of the key. This composite lock assembly effectively improves the security of the lock cylinder.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, specifically to a composite lock cylinder structure of blades and pins. Background Technology

[0002] Common lock cylinders are mainly divided into pin tumbler lock cylinders and wafer lock cylinders. Pin tumbler lock cylinders have a relatively simple structure. They unlock by using teeth of different heights on the key to push the pins, separating the inner and outer lock cylinders. However, this structure has lower security. Wafer lock cylinders offer some improvement in security, unlocking through different combinations of wafers. However, over long-term use, the wafers are prone to wear and jamming, affecting the normal operation of the lock cylinder.

[0003] A combination of blade and pin tumbler lock cylinder structures has appeared on the market. A bolt is slidably installed on the lock cylinder. When the key is inserted into the blade in the lock cylinder, the spring on the lock body presses the bolt into the lock cylinder, thereby allowing the lock cylinder to rotate and improving security.

[0004] However, when locked, the bolt is inserted into the lock body, making it susceptible to being forcibly unlocked. That is, the bolt can be forcibly broken, and the lock cylinder can be turned to unlock the lock. Therefore, there is still room for improvement in security performance. Utility Model Content

[0005] The purpose of this invention is to provide a composite lock cylinder structure of blades and pins to overcome the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A composite lock cylinder structure of blades and pins includes a lock body and a key. The lock body is equipped with a composite lock assembly, which includes a lock cylinder rotatably connected to the lock body. Multiple blade groups are slidably disposed on the lock cylinder, and a bolt is slidably connected to the lock cylinder. The lock body also has a free-spinning assembly, which is fixedly connected to a lock block. The free-spinning assembly has a free-spinning position and an unlocking position: when in the free-spinning position, the assembly abuts against the outer surface of the lock cylinder, allowing the lock cylinder to rotate freely under the influence of the key; when in the unlocking position, the assembly extends into the lock cylinder and abuts against the bolt, allowing the lock cylinder to rotate the lock block under the influence of the key.

[0008] Furthermore, the idling assembly includes a first plate slidably disposed on the lock body, a rotating body rotatably connected inside the lock cylinder, the rotating body being coaxially disposed with the lock cylinder, the rotating body being fixedly connected to the lock block, a second plate being disposed at the end of the first plate, the second plate being slidably connected to the first plate, a limiting hole adapted to the second plate being provided on the rotating body, and an elastic part being provided between the lock body and the first plate.

[0009] Furthermore, the lock cylinder is provided with a first slot and a second slot that are connected to each other. The bolt is slidably connected in the first slot, and the second slot is adapted to the first plate.

[0010] Furthermore, the elastic part includes a plurality of first springs, each of the first springs having a ball at its end. The ball is slidably connected to the lock body and abuts against the first plate under the action of the first spring.

[0011] Furthermore, a positioning ball is slidably disposed on the lock cylinder, and a second spring is disposed between the positioning ball and the lock cylinder, the second spring causing the positioning ball to extend into a positioning groove on the lock body.

[0012] Furthermore, the blade assembly includes two locking blades arranged opposite each other, with arc-shaped rods at the ends of the two locking blades, and a third spring arranged between the two arc-shaped rods, the third spring being parallel to the sliding direction of the locking blades.

[0013] Furthermore, the upper part of the locking blade is provided with a V-shaped groove, the bottom of the locking bolt is adapted to the V-shaped groove, and a through hole is opened in the middle of the locking blade, and a guide block is fixedly installed in the through hole.

[0014] In the above technical solution, the beneficial effects of the composite lock cylinder structure of blade and pin provided by this utility model are as follows:

[0015] By using a composite lock assembly, if an incorrect key or tool is inserted into the lock cylinder, the idle component will be in an idle position. This means that although the lock cylinder can be rotated, it cannot rotate the lock block, thus preventing unlocking. Furthermore, because the lock cylinder is rotating, tools used for forced disassembly have no leverage point to damage the lock cylinder, effectively improving the security of the lock cylinder.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0017] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of a partial explosion structure provided for an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the internal cross-sectional structure provided for an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the idling component structure provided in an embodiment of the present utility model;

[0023] Figure 5 A schematic diagram of the lock cylinder structure provided in an embodiment of this utility model;

[0024] Figure 6 A schematic diagram of the rotating body structure provided in an embodiment of this utility model;

[0025] Figure 7 This is a schematic diagram of the blade assembly structure provided in an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Lock body; 2. Lock cylinder; 21. First slot; 22. Second slot; 3. Leaf assembly; 31. Locking leaf; 32. Arc rod; 33. Third spring; 34. V-groove; 35. Guide block; 4. Bolt; 5. Free-spinning assembly; 51. First plate; 52. Second plate; 53. Rotating body; 54. Limiting hole; 55. First spring; 56. Top ball; 6. Lock block; 7. Positioning ball; 71. Second spring; 8. Key; Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0029] Please see Figure 1-7A composite lock cylinder 2 structure of blade and pin tumbler includes a lock body 1 and a key 8. The lock body 1 is provided with a composite lock assembly, which includes a lock cylinder 2 rotatably connected to the lock body 1. Multiple blade groups 3 are slidably arranged on the lock cylinder 2, and a bolt 4 is slidably connected to the lock cylinder 2. The lock body 1 is also provided with a free-spinning component 5, which is fixedly connected to a lock block 6. The free-spinning component 5 has a free-spinning position and an unlocking position: when the free-spinning component 5 is in the free-spinning position, it abuts against the outer surface of the lock cylinder 2, allowing the lock cylinder 2 to rotate freely under the action of the key 8; when the free-spinning component 5 is in the unlocking position, it extends into the lock cylinder 2 and abuts against the bolt 4, allowing the lock cylinder 2 to rotate through the free-spinning component 5 under the action of the key 8.

[0030] To avoid misunderstanding, please refer to the appendix. Figure 1 The right side of the lock body 1 does not have a composite lock component; that is, the lock body 1 only has one composite lock component.

[0031] Furthermore, the idler assembly 5 includes a first plate 51 slidably disposed on the lock body 1, and a rotating body 53 rotatably connected inside the lock cylinder 2. The rotating body 53 is coaxially disposed with the lock cylinder 2 and is fixedly connected to the lock block 6. A second plate 52 is disposed at the end of the first plate 51, and the second plate 52 is slidably connected to the first plate 51. A limiting hole 54 adapted to the second plate 52 is also provided on the rotating body 53. An elastic part is also provided between the lock body 1 and the first plate 51.

[0032] In the idle position, the bolt 4 abuts against the blade assembly 3 (without the correct key 8 inserted). The outer surface of the bolt 4 and the outer surface of the lock cylinder 2 are on the same arc surface. The first plate 51 abuts against this arc surface and is restricted from rotation by the lock body 1. Therefore, the rotation of the lock cylinder 2 will not drive the rotation of the first plate 51.

[0033] Furthermore, the lock cylinder 2 is provided with a first slot 21 and a second slot 22 that are connected to each other. The bolt 4 is slidably connected in the first slot 21, and the second slot 22 is adapted to the first plate 51.

[0034] Furthermore, the elastic part includes a plurality of first springs 55, and each of the first springs 55 has a ball 56 at its end. The ball 56 is slidably connected inside the lock body 1 and abuts against the first plate 51 under the action of the first springs 55.

[0035] Furthermore, a positioning ball 7 is slidably disposed on the lock cylinder 2, and a second spring 71 is disposed between the positioning ball 7 and the lock cylinder 2. The second spring 71 causes the positioning ball 7 to extend into a positioning groove on the lock body 1. The positioning ball 7 is used to position the lock cylinder 2 so that the bolt 4 corresponds to the first plate 51, so that after the correct key 8 is inserted, it can be directly unlocked through the free-spinning assembly 5.

[0036] Furthermore, the blade assembly 3 includes two opposing locking blades 31, with arc-shaped rods 32 at their ends. A third spring 33 is positioned between the two arc-shaped rods 32, and the third spring 33 is parallel to the sliding direction of the locking blades 31. The third spring 33 keeps the two locking blades 31 within a blade assembly 3 taut, ensuring that the key 8 is correctly inserted into the lock cylinder 2 and preventing criminals from directly unlocking the lock using tools (each locking blade 31, after being moved to the correct position, needs to remain in that position, which is difficult to achieve with tools within the narrow keyhole of the key 8).

[0037] Furthermore, the upper part of the locking blade 31 is provided with a V-shaped groove 34, the bottom of the bolt 4 is adapted to the V-shaped groove, and a through hole is opened in the middle of the locking blade 31, in which a guide block 35 is fixedly installed. When the idle assembly 5 is in the idle position, the bolt 4 abuts against the upper part of the locking blade 31, and when the idle assembly 5 is in the unlocking position, the key 8 causes the V-shaped grooves 34 of each locking blade 31 to form a straight line in the axial direction, so that the bolt 4 abuts against the V-shaped groove 34 of the locking blade 31.

[0038] It is understandable that the positions of the guide blocks 35 on each of the locking blades 31 are different in order to increase the difficulty of cracking and enhance the security performance; while the corresponding key 8 has a continuous guide groove, so that after the key 8 is inserted into the locking blade 31, the V-shaped grooves 34 of each locking blade 31 can form a straight line in the axial direction of the lock cylinder 2.

[0039] Working principle: In the idle position, the bolt 4 abuts against the upper part of the locking blade 31. The outer surface of the bolt 4 and the outer surface of the lock cylinder 2 are on the same arc surface. The first plate 51 abuts against this arc surface and is restricted from rotating by the lock body 1. Therefore, the rotation of the lock cylinder 2 will not drive the rotation of the first plate 51.

[0040] During the unlocking process, under the action of the elastic part, the first plate 51 extends into the second slot 22 on the lock cylinder 2 and abuts the bolt 4 against the V-shaped groove 34 of the locking blade 31. At this time, the first plate 51 is completely located inside the lock cylinder 2, while the second plate 52 extends into the limiting hole 54 of the rotating body 53. The correct key 8 drives the lock cylinder 2 to rotate, the rotation of the lock cylinder 2 drives the first plate 51 to rotate, the rotation of the first plate 51 drives the second plate 52 to rotate, the rotation of the second plate 52 drives the rotating body 53 to rotate, and the rotation of the rotating body 53 drives the lock block 6 to rotate, thereby completing the unlocking.

[0041] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A leaf and pin combination lock cylinder structure comprising a lock body (1) and a key (8), characterized in that: The lock body (1) is provided with a composite lock assembly, which includes a lock cylinder (2) rotatably connected to the lock body (1). Multiple leaf groups (3) are slidably arranged on the lock cylinder (2). A bolt (4) is slidably connected to the lock cylinder (2). The lock body (1) is also provided with a free-spinning assembly (5), which is fixedly connected to the lock block (6). The free-spinning assembly (5) has a free-spinning station and an unlocking station. When the idle component (5) is in the idle position, the idle component (5) abuts against the outer surface of the lock cylinder (2), so that the lock cylinder (2) can be idled under the drive of the key (8); When the idler assembly (5) is in the unlocking position, the idler assembly (5) extends into the lock cylinder (2) and abuts against the bolt (4), so that the lock cylinder (2) can rotate the lock block (6) through the idler assembly (5) under the drive of the key (8).

2. The blade and plug combination lock cylinder structure of claim 1, wherein, The idling assembly (5) includes a first plate (51) slidably disposed on the lock body (1), and a rotating body (53) rotatably connected inside the lock cylinder (2). The rotating body (53) is coaxially disposed with the lock cylinder (2), and the rotating body (53) is fixedly connected with the lock block (6). A second plate (52) is disposed at the end of the first plate (51), and the second plate (52) is slidably connected with the second plate (52). A limiting hole (54) adapted to the second plate (52) is also provided on the rotating body (53), and an elastic part is provided between the lock body (1) and the first plate (51).

3. The composite lock core structure of blade and pin tumbler according to claim 2, characterized in that, The lock cylinder (2) is provided with a first slot (21) and a second slot (22) that are connected to each other. The bolt (4) is slidably connected in the first slot (21), and the second slot (22) is adapted to the first plate (51).

4. The cylinder structure according to claim 2, wherein, The elastic part includes a plurality of first springs (55), and each of the first springs (55) has a ball (56) at its end. The ball (56) is slidably connected to the lock body (1) and abuts against the first plate (51) under the action of the first spring (55).

5. The blade and plug combination lock cylinder structure of claim 1, wherein, A positioning ball (7) is slidably disposed on the lock cylinder (2), and a second spring (71) is disposed between the positioning ball (7) and the lock cylinder (2). The second spring (71) causes the positioning ball (7) to extend into the positioning groove on the lock body (1).

6. The blade and plug combination lock cylinder structure of claim 1, wherein, The blade assembly (3) includes two locking blades (31) arranged opposite to each other. The ends of the two locking blades (31) are provided with arc-shaped rods (32), and a third spring (33) is provided between the two arc-shaped rods (32). The third spring (33) is parallel to the sliding direction of the locking blades (31).

7. The blade and pin tumbler composite lock core structure according to claim 6, characterized in that, The upper part of the locking blade (31) is provided with a V-shaped groove (34), the bottom of the bolt (4) is adapted to the V-shaped groove (34), the middle part of the locking blade (31) is provided with a through hole, and a guide block (35) is fixedly provided in the through hole.

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