Unlocking structure of lock cylinder

Abstract

The unlocking structure comprises a door handle, the lock cylinder is rotationally arranged at the upper end of the door handle, a square shaft sleeve is inserted into the lower end of the door handle, and a linkage square shaft is arranged in the square shaft sleeve; a key hole is formed in the upper end of the lock cylinder, and a spiral groove is formed in the side wall of the lower end of the lock cylinder. A linkage rod is arranged on one side of the upper end of the linkage square shaft and arranged in the spiral groove. The lock cylinder is rotated through a key, the spiral groove drives the linkage rod to drive the linkage square shaft to move upwards, the lower end of the linkage square shaft retracts into the square shaft sleeve, the linkage square shaft is separated from a clutch mechanism in the lock body, the door handle can only idle, a spring bolt in the lock body cannot be driven to stretch out and draw back, and counter locking of the door lock is achieved. The lock cylinder is reversely rotated, so that the linkage square shaft extends out of the lower end of the square shaft sleeve and is connected with a clutch mechanism in the lock body; the door handle is rotated to drive the spring bolt in the lock body to stretch out and draw back through the linkage square shaft; unlocking of the door lock is achieved; the structure is simple, and the door lock manufacturing cost is reduced.

Description

Technical Field

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

[0002] As the name suggests, a door lock is a device used to lock a door to prevent others from opening it. The lock cylinder is the core part that works with the key and can rotate to drive the bolt. The lock cylinder is the main component that controls the opening of the door lock and is the internal heart of the lock.

[0003] Lock cylinders typically have a keyhole at the top that matches the key, and their lower end engages with a clutch mechanism inside the lock body via a linkage to open or lock the door. However, the existing lock cylinder and lock body have a complex engagement structure, resulting in higher manufacturing costs for door locks. Utility Model Content

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

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

[0006] An unlocking structure for a lock cylinder includes a door handle, wherein a lock cylinder is rotatably mounted on the upper end of the handle head, and a square shaft sleeve is inserted into the lower end of the handle, wherein a linkage square shaft is built into the square shaft sleeve.

[0007] The lock cylinder has a keyhole at its upper end and a spiral groove on its lower side wall.

[0008] A linkage rod is provided on one side of the upper end of the linkage square shaft, and the linkage rod is placed in a spiral groove; when the lock core is rotated, the spiral groove drives the linkage rod to move the linkage square shaft up and down within the square shaft sleeve.

[0009] The present invention further includes the following: the square shaft sleeve is provided with a square through hole in the longitudinal direction, the square through hole is adapted to the linkage square shaft, and the linkage square shaft passes through the square through hole.

[0010] The present invention is further provided with a linkage head at the upper end of the linkage square shaft, and the linkage rod is disposed on the linkage head.

[0011] The present invention further includes: a square shaft hole for inserting a square shaft sleeve is provided at the lower end of the handle head; a retaining ring is provided at the upper end of the square shaft sleeve; the retaining ring is placed on the upper end face of the square shaft hole to fix the square shaft sleeve to the door handle.

[0012] The beneficial effects of this utility model are as follows: The upper end of the door handle of this lock is rotatably equipped with a lock cylinder, and the lower end is fitted with a square shaft sleeve, which houses a linkage square shaft. A spiral groove is formed on the side wall of the lower end of the lock cylinder. A linkage rod is provided on one side of the upper end of the linkage square shaft, and the linkage rod is placed within the spiral groove. When the lock cylinder is turned with a key, the spiral groove drives the linkage rod to move the linkage square shaft upward within the square shaft sleeve. The lower end of the linkage square shaft retracts into the square shaft sleeve, separating the linkage square shaft from the clutch mechanism inside the lock body. This allows the door handle to rotate freely, preventing it from driving the bolt inside the lock body to extend or retract, thus achieving deadbolt locking. Reverse rotation of the lock cylinder causes the linkage square shaft to extend from the lower end of the square shaft sleeve and reconnect with the clutch mechanism inside the lock body. Rotating the door handle allows the bolt inside the lock body to extend or retract via the linkage square shaft, thus unlocking the door. This structure is simple and effectively reduces the manufacturing cost of the door lock. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the unlocking structure of a lock cylinder according to the present invention;

[0014] Figure 2 This is a schematic diagram of the door handle structure of the lock cylinder unlocking structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the internal structure of an unlocking structure for a lock cylinder according to the present invention.

[0016] Figure 4 This is a schematic diagram of the square shaft sleeve of the unlocking structure of a lock cylinder according to the present invention;

[0017] Figure 5 This is a schematic diagram of the linkage square shaft of the unlocking structure of a lock cylinder according to the present invention;

[0018] Explanation of reference numerals in the attached diagram: 1. Door handle; 11. Handle head; 111. Square shaft hole; 2. Lock cylinder; 21. Keyhole; 22. Spiral groove; 3. Square shaft sleeve; 31. Square through hole; 32. Snap ring; 4. Linkage square shaft; 41. Linkage head; 42. Linkage rod; 5. Lock body; 51. Clutch component. Detailed Implementation

[0019] See attached document Figures 1 to 5 The present invention provides a more detailed description of the unlocking structure of a lock cylinder.

[0020] An unlocking structure for a lock cylinder includes a door handle 1, wherein a lock cylinder 2 is rotatably mounted on the upper end of the handle head 11 of the door handle 1, and a square shaft sleeve 3 is inserted into the lower end of the handle head 11, wherein a linkage square shaft 4 is built into the square shaft sleeve 3.

[0021] The lock cylinder 2 has a keyhole 21 at its upper end and a spiral groove 22 on its lower side wall.

[0022] A linkage rod 42 is provided on one side of the upper end of the linkage square shaft 4, and the linkage rod 42 is placed in the spiral groove 22. When the lock cylinder 2 is turned with a key, the spiral groove 22 drives the linkage rod 42 to move the linkage square shaft 4 upward within the square shaft sleeve 3. The lower end of the linkage square shaft 4 retracts into the square shaft sleeve 3, separating the linkage square shaft 4 from the clutch mechanism in the lock body 5. This allows the door handle 1 to rotate freely and prevents it from driving the bolt in the lock body 5 to extend or retract, thus achieving the deadbolt lock. When the lock cylinder 2 is turned in the opposite direction, the linkage square shaft 4 extends from the lower end of the square shaft sleeve 3 and reconnects to the clutch mechanism in the lock body 5. When the door handle 1 is turned, the bolt in the lock body 5 can be driven to extend or retract through the linkage square shaft 4, thus unlocking the door. This structure is simple and effectively reduces the manufacturing cost of the door lock.

[0023] The square shaft sleeve 3 is provided with a square through hole 31 in the longitudinal direction. The square through hole 31 is adapted to the linkage square shaft 4, and the linkage square shaft 4 passes through the square through hole 31. This allows the linkage square shaft 4 to move longitudinally relative to the square shaft sleeve 3 when the lock cylinder 2 rotates in the door handle 1, thereby realizing the vertical extension and retraction of the linkage square shaft 4 within the square shaft sleeve 3.

[0024] The upper end of the linkage square shaft 4 is provided with a linkage head 41, and the linkage rod 42 is provided on the linkage head 41; the lower end of the handle head 11 is provided with a square shaft hole 111 for inserting the square shaft sleeve 3, and the upper end of the square shaft sleeve 3 is provided with a retaining ring 32. The retaining ring 32 is placed on the upper end face of the square shaft hole 111 to fix the square shaft sleeve 3 on the door handle 1 and prevent the square shaft sleeve 3 from falling off the lower end of the door handle 1.

[0025] 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 cylinder unlocking structure, characterized by: Includes a door handle, wherein a lock cylinder is rotatably provided at the upper end of the handle head, and a square shaft sleeve is inserted at the lower end of the handle, wherein a linkage square shaft is built into the square shaft sleeve; The lock cylinder has a keyhole at its upper end and a spiral groove on its lower side wall. A linkage rod is provided on one side of the upper end of the linkage square shaft, and the linkage rod is placed in a spiral groove; when the lock core is rotated, the spiral groove drives the linkage rod to move the linkage square shaft up and down within the square shaft sleeve.

2. The unlocking structure of a lock cylinder according to claim 1, characterized in that: The square shaft sleeve has a square through hole in its longitudinal direction. The square through hole is adapted to the linkage square shaft, and the linkage square shaft passes through the square through hole.

3. A cylinder unlocking structure according to claim 1 or 2, characterised in that: The upper end of the linkage square shaft is provided with a linkage head, and the linkage rod is provided on the linkage head.

4. A cylinder unlocking structure according to claim 1 or 2, characterized in that: The lower end of the handle head is provided with a square shaft hole for inserting a square shaft sleeve. The upper end of the square shaft sleeve is fitted with a retaining ring, which is placed on the upper end face of the square shaft hole to fix the square shaft sleeve to the door handle.

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