Magnetic lock (or electromagnetic lock) is designed like electromagnet, using the principle of electromagnetism. When the current passes through the silicon steel sheet, the magnetic lock will produce strong suction force to tightly absorb the adsorption iron plate to lock the door. As long as a small electric current electromagnetic lock will produce a great magnetic force (blog, weibo), control of the access control system of the electromagnetic lock power supply to identify the correct personnel that power off, electromagnetic lock can lose suction to open the door.
How magnetic lock works
We know that every magnet has two poles, one North Pole (N pole) and one South Pole (S pole), and that magnets have the property of repulsing like and attracting like. Magnetic lock is the use of the characteristics of the magnet, the use of permanent magnet (magnetic beads) produced by the **, also known as "electronic lock".
First, magnetic padlock
1. There are two strip plates inside the magnetic padlock, one is a movable plate and the other is a fixed plate. When pulling the padlock lock state lock beam, the lock beam will squeeze the convex block on the movable plate, so that the movable plate has a force to move to the direction of the fixed plate, if the movable plate can move a certain distance to the direction of the fixed plate, the lock can be opened. Four holes are drilled into each of the two strip plates in the longitudinal plane. One end of the four magnetic beads is fixed with a section of brass wire finer than the magnetic beads, and the brass wires on the four magnetic beads are respectively inserted into the four holes on the fixing plate.
The four holes on the fixing plate are thinner than the magnetic beads and thicker than the brass wire, so the magnetic beads can be swayed in all directions on the fixing plate, but after being fixed in the lock, they cannot move vertically because of the limitation of the lock body. The magnetic bead is fixed with one end of the brass wire facing the key slot outside the lock, and the magnetic bead is fixed with one end of the brass wire facing the movable plate. Due to lock in the interaction of these four magnetic beads magnetic force, magnetic beads brass wire and activities at the end of the four holes on the board is not a line (or different) heart, when you have the pull on lock lock beams, lock beam will squeeze on dynamic activity board convex block, activity board at this time although the direction of the force to the fixed plate, but at this time because there is no alignment brass wire activity board hole, In other words, the brass wire will push against the movable plate, limiting the movement of the movable plate in the direction of the fixed plate, so it cannot open the lock.
When outside stick the right key in the lock key groove, the lock in the magnetic beads will be locked outside the magnetic beads in the key of suction (must be inside and pole corresponding to the opposite sex), makes the lock in the four brass wire in the magnetic beads, just aim with the hole on the activity board, respectively when there is tension on two lock lock liang, activity board on the convex block to be squeezed, It will overcome the force of the lock spring and move to the direction of the fixed plate, because then the four brass wires can enter the hole on the movable plate, and the movable plate can move a certain distance to the direction of the fixed plate, and the lock can be opened. The end of the brass wire is pointed so that it can smoothly enter the hole in the movable plate. When the lock beam is aligned with the lock hole, the lock beam will be locked by the pull of the spring, the lock beam will be pulled into the lock hole, and the active plate will be returned to the original position by the force of the spring, and the lock.
Two, magnetic door lock
1, magnetic door lock lock (including magnetic drawer lock) and the basic structure of the "ten" pin lock head is very similar. The basic structure is also composed of a lock core (plunger) and a lock core jacket (lock barrel). The billiard lock has a billiard chamber; the magnetic lock has a "billiard chamber," as I call it; The billiard hole on the night lock core is through hole (see through the keyhole marbles), and the magnetic beads on the magnetic lock hole is blind holes (see magnetic beads from magnetic locks the keyhole), magnetic lock on the blind hole depth, shorter than the height of the magnetic beads, not inserted in the right key, both part of the magnetic particles can enter the blind holes on the lock, another part of the dew outside the lock, the lock core hole, This is the locking state of the magnetic lock.
The pin lock is made of pin, and the magnetic lock is made of magnetic ball. The pin lock has upper and lower beads, and the magnetic lock also has upper and lower magnetic beads. The elastic force of the spring is used to control the locking function of the ball to keep the lock closed and static state. The two magnetic beads in each magnetic ball room of the magnetic lock are of the same polarity, and the magnetic force is used to push the lower magnetic ball into the blind hole of the lock core to keep the lock closed and static state.
The pin lock uses the appropriate key to insert the lock hole, and directly contact with the pin to overcome the spring elastic action to remove all the pin bolt action and unlock; Magnetic lock is the use of appropriate magnetic key, the use of magnetic beads in the key and lock inside the magnetic beads of the opposite repulsion force, non-contact to push out all the magnetic beads in the lock core blind hole, remove the role of each magnetic beads to unlock the lock; The space position of the bolt making in each "ten" lock head of the same model is fixed (such as the difference of 90° between each row of beads), but the length of each pin ball is different, which is consistent with the height of the key tooth used. The space position of the magnetic ball making in each magnetic lock head of the same model is different, but the length of each magnetic ball is the same. The polarity of the magnetic beads in each chamber is different and corresponds to the position and polarity of the magnetic beads on the key that opens the lock.