Door lock cylinder

Abstract

The utility model discloses a door lock cylinder which comprises a lock cylinder shell and a lock container, a key hole is formed in one end of the lock container, and the other end of the lock container is connected with a shifting wheel. A locking assembly is installed in an installation groove in the side wall of the lock cylinder and comprises a lock bolt, an unlocking spring and a spring fixing piece which are sequentially arranged from bottom to top, the lower end of the unlocking spring abuts against the lock bolt, and the upper end of the unlocking spring abuts against the spring fixing piece. A plurality of special-shaped marbles are arranged in the lock cylinder, unlocking grooves are formed in the sides, facing the lock bolt, of the special-shaped marbles, the unlocking grooves in the special-shaped marbles are arranged in a staggered mode, and matching columns are arranged on the sides, facing the key hole, of the special-shaped marbles. One end part of the lock bolt penetrates out of the mounting groove to be arranged in the locking groove of the lock cylinder shell under the extrusion of the side wall of the special-shaped marble, so that the lock liner is locked on the lock cylinder shell; after a key is inserted, the unlocking grooves of the special-shaped marbles are driven to be located on the same level, the lock bolt is separated from the locking groove, locking of the lock cylinder is relieved, and unlocking is achieved. The safety performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of lock cylinder technology, and more specifically, to a door lock cylinder. Background Technology

[0002] Locks are devices that serve a sealing function and are widely used in daily life. The lock cylinder is the heart of the lock. Its principle is that a key with a specific tooth shape is inserted into the lock cylinder's key hole, which causes the bolt to release the lock cylinder from its lock shell, thus separating the lock cylinder from the lock cylinder housing. This allows the key to drive the lock cylinder and the dial to rotate, thereby realizing the unlocking operation.

[0003] However, the locking structure of the existing lock cylinder's internal bolt is poorly designed and easily opened, resulting in low security performance of the door lock. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a door lock cylinder.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A door lock cylinder includes a lock cylinder shell and a lock cylinder rotatably disposed within the lock cylinder shell. One end of the lock cylinder is provided with a keyhole, and the other end is connected to a dial. A locking assembly is installed in a mounting groove on the side wall of the lock cylinder. The locking assembly includes a bolt, an unlocking spring, and a spring fixing plate arranged sequentially from bottom to top. The lower end of the unlocking spring abuts against the bolt, and the upper end abuts against the spring fixing plate.

[0007] The lock cylinder is provided with several irregularly shaped pins, which are placed between the keyhole and the mounting groove;

[0008] The irregularly shaped pin has an unlocking groove on the side facing the bolt, and the unlocking grooves on several irregularly shaped pins are staggered. The irregularly shaped pin has a mating post on the side facing the keyhole.

[0009] Under the pressure of the side wall of the irregularly shaped ball, one end of the bolt passes through the mounting groove and is placed in the locking groove of the lock cylinder shell, locking the lock cylinder to the lock cylinder shell;

[0010] When the key is inserted into the keyhole, the irregular groove on the side wall of the key engages with the mating post of several irregularly shaped pins, so that several unlocking grooves are at the same level and are set opposite to the bolt. The bolt moves inward under the action of the unlocking spring and separates from the locking groove.

[0011] The present invention further includes the following features: the lock cylinder is provided with a plurality of mounting holes for installing irregularly shaped pins, and a reset spring is installed inside the mounting holes. The lower end of the reset spring abuts against the bottom wall of the mounting hole, and the upper end abuts against the irregularly shaped pin, so that after the key is pulled out, the irregularly shaped pin is reset under the action of the reset spring.

[0012] The present invention further specifies that the number of the irregularly shaped marbles is five.

[0013] The beneficial effects of this utility model are as follows: A locking component is installed in the mounting groove on the side wall of the lock cylinder of this door lock. The locking component includes a bolt, an unlocking spring, and a spring fixing plate arranged sequentially from bottom to top. The lower end of the unlocking spring abuts against the bolt, and the upper end abuts against the spring fixing plate. Several irregularly shaped pins are provided inside the lock cylinder. These irregularly shaped pins are placed between the keyhole and the mounting groove. The irregularly shaped pins have unlocking grooves on the side facing the bolt, and the unlocking grooves on several irregularly shaped pins are staggered. The irregularly shaped pins have a mating post on the side facing the keyhole.

[0014] In its natural state, the bolt, pressed against the side wall of the shaped pins, has one end protrude from the mounting groove and enter the locking groove of the lock cylinder, firmly locking the lock cylinder to the lock cylinder. Only when a suitable key is inserted into the keyhole, the shaped groove on the key's side wall engages with the mating pins of several shaped pins, bringing several unlocking grooves to the same level and opposite to the bolt. Under the action of the unlocking spring, the bolt moves inward and separates from the locking groove, releasing the lock cylinder. The lock cylinder can then be unlocked by turning the key, which in turn drives the key and the dial wheel. In other words, only a key with a matching shaped groove can open the lock cylinder, improving the security performance of the door lock. Attached Figure Description

[0015] Figure 1 This is an exploded view of a door lock cylinder according to the present invention;

[0016] Figure 2 This is an installation diagram of the locking component of a door lock cylinder according to the present invention.

[0017] Figure 3 This is an installation diagram of the irregularly shaped pins of a door lock cylinder according to the present invention.

[0018] Explanation of reference numerals in the attached diagram: 1. Lock cylinder housing; 2. Lock cylinder; 22. Dial wheel; 23. Mounting slot; 24. Mounting hole; 3. Locking assembly; 31. Lock bolt; 32. Unlocking spring; 33. Spring retaining plate; 4. Irregularly shaped pin; 41. Unlocking slot; 42. Matching pin; 43. Return spring; 5. Key; 51. Irregularly shaped slot. Detailed Implementation

[0019] See attached document Figures 1 to 3 This utility model provides a more detailed description of a door lock cylinder.

[0020] A door lock cylinder includes a lock cylinder shell 1 and a lock cylinder 2 rotatably disposed within the lock cylinder shell 1. One end of the lock cylinder 2 is provided with a keyhole, and the other end is connected to a dial 22. A locking assembly 3 is installed in the mounting groove 23 on the side wall of the lock cylinder 2. The locking assembly 3 includes a bolt 31, an unlocking spring 32, and a spring fixing plate 33 arranged sequentially from bottom to top. The lower end of the unlocking spring 32 abuts against the bolt 31, and the upper end abuts against the spring fixing plate 33.

[0021] The lock cylinder 2 is provided with five irregularly shaped pins 4, which are placed between the keyhole and the mounting groove 23;

[0022] The irregularly shaped pin 4 has an unlocking groove 41 on the side facing the bolt 31, and the unlocking grooves 41 on the five irregularly shaped pins 4 are staggered. The irregularly shaped pin 4 has a mating post 42 on the side facing the keyhole.

[0023] In its natural state, the bolt 31 is pressed by the side wall of the irregularly shaped ball 4, and one end of the bolt 31 passes through the mounting groove 23 and is placed in the locking groove on the inner side wall of the lock cylinder shell 1, thus firmly locking the lock cylinder 2 onto the lock cylinder shell 1.

[0024] Only when the matching key 5 is inserted into the keyhole, the irregular groove 51 on the side wall of the key 5 engages with the mating post 42 of several irregularly shaped pins 4, so that the five unlocking grooves 41 are at the same level and are set opposite to the bolt 31. The bolt 31 moves inward under the action of the unlocking spring 32 and separates from the locking groove, releasing the lock cylinder 2. Then, the key 5 can be turned to drive the lock cylinder 2 and the dial 22 to perform the unlocking operation. That is, only the key 5 with the matching irregular groove 51 can open the lock cylinder, thus improving the security performance of the door lock.

[0025] The lock cylinder 2 can be equipped with irregularly shaped pins 4 and locking components 3 on both sides to further improve the security performance of the lock cylinder;

[0026] The lock cylinder 2 is provided with several mounting holes 24 for installing irregularly shaped pins 4. Each mounting hole 24 contains a return spring 43. The lower end of the return spring 43 abuts against the bottom wall of the mounting hole 24, and the upper end abuts against the irregularly shaped pin 4. When the key 5 is pulled out, the irregularly shaped pin 4 is reset under the action of the return spring 43. When the key 5 is inserted into the keyhole, the irregularly shaped groove 51 of the key 5 pushes the irregularly shaped pin 4 up and down in the mounting hole 24 by pressing the mating post 42, and compresses the return spring 43, so that the five irregularly shaped grooves 51 on the five irregularly shaped pins 4 are at the same level. After the key 5 is pulled out, the irregularly shaped pin 4 is reset under the action of the return spring 43, so that the unlocking groove 41 is misaligned with the bolt 31, and the side wall of the irregularly shaped pin 4 presses the bolt 31 outward again, so that the bolt 31 is placed back in the locking groove of the lock cylinder 1, locking the lock cylinder 2 inside the lock cylinder 1.

[0027] 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 door lock cylinder comprising a cylinder housing and a plug rotatably arranged in the cylinder housing, one end of the plug being provided with a key hole and the other end being connected with a dial; characterized in that: The locking assembly is installed in the mounting groove of the side wall of the lock cylinder, and comprises a lock bolt, an unlocking spring and a spring fixing plate arranged in sequence from bottom to top. The lock cylinder is provided with a plurality of special-shaped balls arranged between the keyhole and the mounting groove. The side of the special-shaped ball facing the lock bolt is provided with an unlocking groove, and the unlocking grooves on the special-shaped balls are arranged staggeredly. The lock bolt is pressed by the side wall of the special-shaped ball, and one end thereof is arranged in the locking groove of the lock cylinder shell and locked on the lock cylinder shell. When the key is inserted into the keyhole, the special-shaped groove on the side wall of the key cooperates with the cooperating column of the special-shaped balls, so that the unlocking grooves are arranged at the same level and opposite to the lock bolt.

2. A lock cylinder according to claim 1 wherein: The lock cylinder is provided with a plurality of mounting holes for installing the special-shaped balls, and the mounting holes are provided with reset springs.

3. A lock cylinder according to claim 1 or 2, characterised in that: The number of the special-shaped balls is five.

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