Spiral tightening cylindrical lock

Abstract

The utility model relates to a spiral tightening cylindrical lock, which aims at solving the technical problems of complicated lock cylinder structure, high production cost, inconvenience in production and assembly, easiness in abrasion and short service life caused by the structural design of an inner shaft sleeve and an outer shaft sleeve at a lock cylinder of the conventional like product. One end of a rotating shaft in a base of the cylindrical lock extends out of a bottom hole in one end of the base, a steel bolt is arranged on a square rod threaded part at the end of the rotating shaft, a square hole of the steel bolt is connected with the square rod threaded part of the rotating shaft, and small gaskets and small nuts are arranged on the square rod threaded part of the rotating shaft on the two sides of the steel bolt respectively; the key point is that the other end of the rotating shaft in the base is sleeved in a rod groove at one end of the lock cylinder and is provided with a pin, two ends of the pin extending out of the rotating shaft are inserted into spiral holes symmetrically arranged at two sides of the end of the lock cylinder, a raised unlocking head at the other end of the lock cylinder is arranged in a top hole at the other end of the base, and a spring is arranged between the top in the rod groove of the lock cylinder and the end part of the rotating shaft. And a steel wire baffle ring and an O-shaped sealing ring are respectively arranged in the steel wire baffle ring groove and the sealing ring groove of the lock cylinder.

Description

Technical Field

[0001] This utility model relates to a cylindrical lock, specifically a spiral tightening cylindrical lock. Background Technology

[0002] Cylindrical locks are a common type of lock, a type of rotary latch lock, a simple-to-install pin tumbler rotary latch lock, also known as a cam lock, retractable lock, or tightening lock, and are widely used in daily life and industrial fields. Traditional cylindrical locks generally consist of a base, lock cylinder, spring, pivot, inner and outer bushings, and bolts. An example of such a cylindrical lock is disclosed in Chinese patent literature, authorization announcement number CN211524436U, authorization announcement date 2020.09.18, utility model name "Cylindrical Lock"; the lock cylinder and bushing of this cylindrical lock feature an inner and outer bushing structure design. However, the above-mentioned products and existing cylindrical locks have the following problems: 1. Complex lock cylinder structure, high manufacturing cost; 2. Easy wear of inner and outer bushings, leading to a shortened lock life; 3. Insufficient IP protection performance, resulting in low security. Summary of the Invention

[0003] To overcome the aforementioned shortcomings, the purpose of this utility model is to provide a spiral tightening cylindrical lock that solves the technical problems of existing similar products, such as complex lock cylinder structure, high production cost, inconvenient production and assembly, easy wear, and short lifespan. This objective is achieved through the following technical solution.

[0004] A spiral tightening cylindrical lock has a base in which one end of a rotating shaft extends from the bottom hole of the base. A steel bolt is provided on the threaded portion of the square rod at this end of the rotating shaft. The square hole of the steel bolt connects to the threaded portion of the square rod of the rotating shaft. Small washers and small nuts are respectively provided on the threaded portions of the square rod at both sides of the steel bolt. A sealing washer, a large washer, and a large nut are provided on the external thread of the square rod on the outer diameter of the base. The key structural design feature is that the other end of the rotating shaft inside the base is fitted into the groove at one end of the lock cylinder and is equipped with a pin. The two ends of the pin extending from the rotating shaft are inserted into symmetrically arranged spiral holes on both sides of the lock cylinder. A protruding unlocking head at the other end of the lock cylinder is located in the top hole at the other end of the base. A spring is provided between the top of the groove of the lock cylinder and the end of the rotating shaft. Thus, by reducing parts and optimizing the design structure of the base and lock cylinder, the cylindrical lock improves its service life and security against unlocking. Furthermore, the following structural improvements enhance IP protection, making it suitable for various application scenarios.

[0005] The lock cylinder has a wire retaining ring groove and a sealing ring groove at the protruding ring diameter above the spiral hole. A wire retaining ring and an O-ring seal are respectively installed in the wire retaining ring groove and the sealing ring groove of the lock cylinder. The lock cylinder is fixed to the corresponding inner wall groove of the base by the wire retaining ring, and the O-ring seal is abutted and sealed against the inner wall of the base. The aforementioned wire retaining ring is elastically fixed between the lock cylinder and the base to prevent the lock cylinder from popping out or being pried open by external force. The O-ring seal is selected based on a calculated reasonable compression amount, and its tight fit between the sealing ring groove of the lock cylinder and the base achieves IP protection.

[0006] The base has a sealing ring at its bottom opening to seal the opening. The sealing ring is fixedly installed within the bottom opening of the base. This structure facilitates sealing of the corresponding component from the bottom opening of the base after it is installed inside the base.

[0007] The base of the pin has a corresponding rotating groove on its inner wall. This facilitates the rotational stability of the pin and the further assembly and production of the corresponding components.

[0008] The steel bolts are either Z-shaped bent and stamped, or they are straight bolts. Both types of bolt structures are chosen as needed.

[0009] The square threaded portion or square head at one end of the shaft extends beyond the bottom hole of the base. The square hole of the steel bolt is fixed to the square head at that end of the shaft by a screw. The above is another specific structural embodiment of the shaft extending beyond the base.

[0010] This utility model has a reasonable design, simple structure, convenient production, installation and use, low production cost, long service life, good durability and safety, good dustproof and waterproof effect, and wide application range; it is mainly used as a spiral tightening cylindrical lock, as well as a structural improvement of similar products. Attached Figure Description

[0011] Figure 1 This is an exploded structural diagram of Embodiment 1 of this utility model.

[0012] Figure 2 yes Figure 1 A schematic diagram of the assembled cross-sectional structure.

[0013] Figure 3 yes Figure 1 A schematic diagram of the assembled three-dimensional structure.

[0014] Figure 4 yes Figure 1 A schematic diagram of the half-section structure of the base.

[0015] Figure 5 yes Figure 1 A schematic diagram of the three-dimensional structure at the bottom of the base.

[0016] Figure 6 This is a schematic diagram of the bottom steel bolt in the open state of Embodiment 2 of this utility model.

[0017] Attached figures and their names: 1. Lock cylinder, 101. Spiral hole, 2. O-ring, 3. Wire retaining ring, 4. Spring, 5. Pin, 6. Shaft, 7. Base, 701. Rotating groove, 8. Sealing plate ring, 9. Sealing washer, 10. Large washer, 11. Large nut, 12. First small nut, 13. First small washer, 14. Steel bolt, 15. Second small washer, 16. Second small nut. Detailed Implementation

[0018] The structure and use of this utility model will now be further described with reference to the accompanying drawings. Figures 1-5 In the first embodiment shown, one end of the rotating shaft 6 inside the base 7 of the cylindrical lock extends out of the bottom hole at one end of the base. A steel bolt 14 is provided on the square threaded portion of the rotating shaft at this end. The steel bolt is formed by Z-shaped bending and stamping. The square hole of the steel bolt connects to the square threaded portion of the rotating shaft. Small washers and small nuts are respectively provided on the square threaded portion of the rotating shaft on both sides of the steel bolt. A sealing washer 9, a large washer 10, and a large nut 11 are provided on the square external thread of the base's outer diameter. The other end of the rotating shaft inside the base is fitted into the groove at one end of the lock cylinder 1 and is provided with a pin 5. The two ends of the pin extending from the rotating shaft are inserted into symmetrically arranged spiral holes 101 on both sides of the lock cylinder at this end. The unlocking head protruding from the other end of the lock cylinder is located in the top hole at the other end of the base. A spring 4 is provided between the top of the groove of the lock cylinder and the end of the rotating shaft. The lock cylinder has a wire retaining ring groove and a sealing ring groove at the raised diameter above the spiral hole. A wire retaining ring 3 and an O-ring seal 2 are respectively installed in the wire retaining ring groove and the sealing ring groove. The lock cylinder is fixed to the corresponding inner wall groove of the base by the wire retaining ring, and the O-ring seal is abutted and sealed against the inner wall of the base. Simultaneously, the bottom opening of the base has a sealing ring 8 to enclose the opening, which is fixedly installed within the bottom opening diameter of the base. A corresponding rotating groove 701 is provided on the inner wall of the base at the pin location.

[0019] like Figure 6 In the second embodiment shown, the square rod threaded part at one end of the shaft may be a square head. The square head at one end of the shaft extends out of the bottom hole of the base. The square hole of the steel bolt is fixed to the square head at that end of the shaft by a screw. The steel bolt is a slotted steel bolt.

[0020] When in use, the tool key is inserted into the lock cylinder and rotated. First, the shaft moves up and down (through the spiral hole structure), and then rotates through the pin, lock cylinder, and shaft in the rotating groove of the base to unlock left and right.

[0021] The cylinder lock uses a combined turning and milling process, with a helical hole structure milled around the cylinder's periphery. The base is also made using a combined turning and milling process, with a pin rotation groove milled inside. The aforementioned rotating shaft moves between the lock cylinder and the base, causing the bolt to rotate. The pin connects the lock cylinder and the rotating shaft, increasing the difficulty of duplication and improving anti-theft performance. The O-ring seal is made of fatigue-resistant rubber material, ensuring IP protection. The wire retaining ring is made of fatigue-resistant spring material to prevent the lock cylinder from dislodging. The spring is also made of fatigue-resistant spring material, providing initial elasticity and reset. The bolt locks the door frame by rotating.

[0022] In summary, this cylindrical lock features an improved spiral tightening structure, resulting in a simple, durable, and highly secure lock suitable for various applications such as door locks, cabinet locks, and vehicle locks. Its structure eliminates the traditional inner and outer bushing structure, replacing it with a direct fit between the base and the lock cylinder. The locking and unlocking are achieved through the rotation of the lock cylinder's spiral hole within the base via a rotating shaft. An O-ring provides waterproofing, and the structure is further optimized for strength. The advantages of this cylindrical lock are as follows: 1. Simple structure and low manufacturing cost; 2. Simple assembly and significantly extended lock life; 3. IP65 dust and water resistance.

Claims

1. A spiral tightening cylindrical lock, wherein one end of a rotating shaft (6) extends out of the bottom hole of one end of the base (7) of the cylindrical lock, and a steel bolt (14) is provided on the square threaded part of the rotating shaft at that end. The square hole of the steel bolt is connected to the square threaded part of the rotating shaft. At the same time, small washers and small nuts are respectively provided on the square threaded part of the rotating shaft on both sides of the steel bolt. A sealing washer (9), a large washer (10) and a large nut (11) are provided on the square external thread of the outer diameter of the base; characterized in that The other end of the rotating shaft (6) inside the base (7) is fitted into the rod groove at one end of the lock cylinder (1) and is provided with a pin (5). The two ends of the pin extending out of the rotating shaft are inserted into the spiral holes (101) symmetrically arranged on both sides of the lock cylinder. The unlocking head protruding at the other end of the lock cylinder is set in the top hole at the other end of the base. A spring (4) is provided between the top of the rod groove of the lock cylinder and the end of the rotating shaft.

2. The spiral tightening cylindrical lock according to claim 1, characterized in that... The lock cylinder (1) has a wire retaining ring groove and a sealing ring groove at the protruding ring diameter above the spiral hole (101). The wire retaining ring groove and the sealing ring groove of the lock cylinder are respectively provided with a wire retaining ring (3) and an O-ring seal (2). The lock cylinder is fixed to the corresponding inner wall groove of the base (7) by the wire retaining ring. The O-ring seal is sealed against the inner wall of the base.

3. The spiral tightening cylindrical lock according to claim 1, characterized in that... The bottom opening of the base (7) is provided with a sealing ring (8) to seal the opening. The sealing ring is fixedly installed on the inner diameter of the bottom opening of the base.

4. The spiral tightening cylindrical lock according to claim 1, characterized in that... The base (7) at the pin (5) has a corresponding rotating groove (701) on its inner wall.

5. The spiral tightening cylindrical lock according to claim 1, characterized in that... The steel bolt (14) is formed by Z-shaped bending and stamping, or the steel bolt is a straight steel bolt.

6. The spiral tightening cylindrical lock according to claim 1, characterized in that... The square rod threaded part or square head at one end of the shaft (6) extends out of the bottom hole of the base (7), and the square hole of the bolt (14) is fixed to the square head at that end of the shaft by a screw.

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