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Classification of locks
With the advancement of the times, locks have developed rapidly. The styles and varieties are endless, which makes the locks occupy an extremely important position in the hardware products and security products industry. Taking the commonly used marble structure mechanical lock as an example, the locks are generally classified and explained only according to the use occasion.
A. Building building locks
The locks used in building buildings refer to the locks used on the doors of buildings, which can be divided into four categories.
1. The external door lock is a lock that is mounted on the surface of the door.
Generally applicable to the gates outside the building, used on the outer door or hall door of each house. Its varieties are single tongue lock, double tongue lock (or multi-tongue lock) and double buckle lock (commonly known as tiger lock). The single tongue, double tongue or multiple tongues are generally horizontal when in motion; while the double buckle (tiger) lock is in the vertical direction when moving.
The lock structure in the external lock is generally divided into a single lock head and a double lock head. The differences between them are mainly as follows:
1. Single lock head: The door is opened with a key, and the handle is opened with a handle (or knob). It has strong confidentiality outside the door, easy operation inside the door, no need for a key, and is especially suitable for use in emergency situations such as fire prevention. But the fly in the ointment is that as long as someone is inside the door (including thieves), the door can be opened at any time.
2. Double lock head: The door is opened with the key inside the door. Its confidentiality is higher than the single lock. The thief can't open without the key after entering the inside. In addition, most of them also have the defense function, as long as there is no key lock. The tongue is retracted and the lock cannot be removed with ordinary tools such as screwdrivers, pliers, or hammers. But unfortunately, in emergency operation (such as it is more difficult to escape when a fire occurs), there is no single lock, it is easy to be busy, and the error is delayed. In the double buckle (tiger) lock, because the lock tongue moves in the vertical direction, The locking tongue is generally cylindrical, and the locking tongue is extended or retracted by a key or a knob (or a handle). Therefore, the locking tongue structure has a self-collision and a non-self-collision function, and the difference between them is:
a. Self-touch function: There is a slope on the cylinder lock tongue. As long as the lock body and the lock plate meet, the lock tongue will be hooked. It is commonly called self-touch. At this time, the key must be opened outside the door, and the door is inside. Use the screw (or handle) or the key to lock or open; the self-touch function lock body usually has a safety button. When the door needs to be covered and not locked, the safety button must be locked to make the lock surface The oblique tongue does not extend, the door can be freely opened and closed, and the door does not have a key. It is impossible to open the door.
b. Non-self-collision function: There is no inclined surface on the cylinder lock tongue. When only the lock tongue is indented, the door can be closed, and then locked with a knob (or handle) or a key. When the lock tongue is extended, the door However, it cannot be turned off. The lock generally does not have a safety button. The door needs to be switched with a key, and the door is closed with a knob (or handle) or a key.
2. Spherical door lock The lock body is inserted into the door, and the lock and the insurance mechanism are placed in the ball handle (handle).
Generally applicable to the inner door of the house, there are cylinder spherical and three-rod spherical, cylinder handle and three-bar handle. The cylinder and the three rods differ in the structure of the lock body, and their functions are different. The function of the cylinder lock is to open the key directly. The three-bar lock uses the key to open or close the switch, and then use the handle or handle to open. Domestically, there are many cylinders used, and foreign countries use three-bar type. It includes door locks, bathroom locks, access locks, storage locks, patio locks/balcony locks, classroom locks, emergency exit locks, one-way interlocking locks, two-way interlocking locks, hotel locks, hotel presidential locks, single head fixing Lock, double-headed fixed lock, set lock, etc.
3. The mortise lock is inserted into the stile, and the lock is assembled on the surface of the door.
Because of its good anti-theft, it is suitable for use on the outer door of the house. (However, it can be installed on the inner door according to the actual situation) It is especially suitable for people with disabilities. It includes: single tongue, single oblique tongue, double tongue, multiple tongues, multiple tongue linkage and so on.