Lock head

Abstract

The invention discloses a lock head which comprises a lock body, a lock cylinder and a key. Three blades are arranged in each blade groove of the lock cylinder and are respectively matched with three key tooth grooves in the key; as the key is a three-groove structure with large password amounts, the mutual opening rate of the product is effectively reduced; a single inclined surface groove or a square groove is formed in the three blades of the blade groove; a square flange on a side column which is cooperated with the inclined surface groove or the square groove is also in a square shape (refer to the Specification). The structural design effectively increases the product technological open difficulty, a convex rib is arranged in a key hole and a slotted groove is formed in the key; due to the slotted groove, a powerful picklock used by a thief becomes fragile, and the lock head has good pick-proof performance.

Description

technical field [0001] The invention relates to a lock, especially a lock cylinder. Background technique [0002] The blade locks currently on the market are generally equipped with several blade grooves on the lock cylinder, and each blade groove is equipped with two blades. This kind of lock has relatively poor anti-technical opening performance due to the small number of keys; recently introduced Among the blade locks in the market, some manufacturers set three blades in each blade groove. For locks of the same size and length, the number of blades set with three blades is more than that of two blades, so it is anti-technical. The performance should be greatly improved. However, among the three blades in each blade groove, two of the blades are equipped with springs, and the remaining one is not equipped with springs. The blades with springs have better anti-technical opening performance. , because when the unlocking tool moves the blades, each leaf with springs must be ...

AI Technical Summary

Problems solved by technology

[0002] The blade locks currently on the market are generally equipped with several blade grooves on the lock cylinder, and each blade groove is equipped with two blades. This kind of lock has relatively poor anti-technical opening performance due to the small number of keys; recently introduced Among the blade locks in the market, some manufacturers set three blades in each blade groove. For locks of the same size and length, the number of blades set with three blades is more than that of two blades, so it is anti-technical. The performance should be greatly improved. However, among the three blades in each blade groove, two of the blades are equipped with springs, and the remaining one is not equipped with springs. The blades with springs have better anti-technical opening performance. , because when the unlocking tool moves the blades, each leaf with springs must be set in the correct position, and at the same time overcome the pressure of the leaf springs, so the operation is relatively difficult, and the blades without springs, because there is no spring Pressure, so it can move freely, and will not move after moving, so its anti-technical opening performance is poor

[0003] In addition, there are no spring blades, and the tooth blades that match it on the key can only use internal milling teeth. The shape of the tooth blades must be a serpentine groove. On the lock cylinder, the key hole matching the key cannot be provided with convex ribs, because the serpentine groove on the key cannot be matched. There are already three rows of teeth on the key, and there is no room for another inline groove, so it is matched with it There is no way to set the ribs in the keyhole of the keyhole, so the key can only be made relatively thin. As long as the key is thicker, the corresponding lockpicking tool can also be made thicker. It is easy to break the lock and open it. Therefore, such a lock The head, the key can only be set on the front, and the back is not dare to set the anti. If the back is also set, the key will be very thick and not anti-prying. The key can only be set on the front. not convenient

[0004] The patent No. ZL 200720062590.6 is a patent titled "An Anti-theft Leaf Lock and Key". Its structure and principle are that there are "∨" shaped grooves on the leaf, through which the locking pin is controlled to lock and lock. Opening, its anti-technical opening performance has been improved to a certain extent, but it has two disadvantages. First, the mutual opening rate is relatively high. It is possible to open the lock by inserting a key with similar teeth. Second, Anti-technical opening performance is not ideal

Images