It is mainly composed of a large bracket, a small bracket, a pull tab and a brake pad.
Big bracket: The main function of the big bracket is to drive the big locking bolt to rotate. Its head is linked with the big lock tongue, and a rectangular hole in the middle is matched with the hanging ear on the pull ring to control the expansion and contraction of the big lock tongue. The outermost edge of the big bracket is provided with a brake pad groove.
Small bracket: The small bracket is the main component to control the self-locking of the large locking bolt, and its head is used to assemble the small locking bolt. Different from the big bracket, the middle of the small bracket is a protruding triangle, which can be used to push the brake pad.
Pull-tab: Pull-tab means that when the locking bolt retracts, the locking bolt will not extend through the pull-tab, thus preventing the locking bolt from self-locking. The pull-tab is inserted into the rectangular hole in the middle of the big bracket through the hanging ear at the top, so that the pull-tab and the big bracket are retracted together, thereby controlling the lock tongue. In addition, the supporting angles on both sides of the pull-tab can control the brake pad, thus releasing the self-locking of the large locking tongue.
Brake pad: Brake pad can play the role of anti-prying, and the self-locking of the big lock tongue is controlled by the brake pad, so that the big lock tongue cannot be easily opened.
2. Lock body
The lock body is mainly composed of the following parts: lock head, large and small tubes, slider and hook block.
Lock tube: the lock tube is mainly used to fix the lock head, and its head has two pins, which can be used to toggle the slider. The main function of the small tube is to provide elasticity for the rebound of the hook.
Sliding block: The main function of the sliding block is to pull the locking bolt inward and make the door open. At the top of the slider, there is a chin-like part. After the pull-tab and the big bracket are embedded in this mouth, the retraction of the lock tongue can be controlled very conveniently by flexible rotation.
Hook stop: on the one hand, it can position the hook, on the other hand, it can also be used as a positioning plate when the slider slides.
Extended data
According to different locking technologies and applications, door locks are divided into the following categories:
1, spherical door lock
The handle of the finger lock is spherical, the manufacturing process is relatively simple and the cost is low. Because of its poor security, it is widely used in China and indoor door lock. Products are mainly made of iron, stainless steel and copper. The internal structure of the product is made of iron, the shell is made of stainless steel and the lock core is made of copper.
2. Three-bar hand lock
The handle of the finger lock is a door handle, which has relatively simple manufacturing process and low cost. Because of its poor security, it is widely used in China and indoor door lock. Products are mainly made of iron, stainless steel, copper and zinc alloy. The internal structure of the product is made of iron, the shell is made of stainless steel, the lock core is made of copper and the lock handle is made of zinc alloy.
3, mortise hand lock
This kind of lock is divided into split lock and conjoined lock. Products are made of many materials, such as zinc alloy, stainless steel and copper. The product has good safety and is often used in entrance doors and room doors. Office buildings are widely used.
4. Glass door lock
With the appearance of glass doors, there are also many glass door locks. The advantage of the glass lock is that the glass does not need to be punched, and the safety performance is better.