Card direct plug-in type lock core

Abstract

The invention discloses a card direct plug-in type lock core, which comprises a lock core body and a key. The key adopts a card structure; a key slot is formed on one side of the lock core body; a lock plate is slidably arranged in the lock core body; a plurality of upper marble holes and lower marble holes are respectively formed on the lock plate and the lock core body; the upper marble holes and the lower marble holes correspond one by one and are communicated with the slot; the upper marble holes are blind holes with downward openings, and pressure springs and upper marbles with the same length are arranged in the upper marble holes; the lower marble holes are through holes, and lower marbles which have different lengths and are pressed against the upper marbles are arranged in the lower marble holes; the surface of one side of the card key is provided with concave holes which are matched with the lower marbles; the depth of the concave holes is matched with the length of the lower marbles; and when the card key is inserted into the key slot, the upper end face of each lower marble is flush with a connecting line of the upper and lower marble holes. Therefore, the invention provides the lock core capable of opening a block position to unlock by inserting the key without rotating the key; and the card direct plug-in type lock core has the advantages of convenient operation, reliable use, low mutual opening rate and high theft-proof performance.

Description

Technical field: [0001] The invention relates to a lock cylinder structure in a door lock, in particular to a card direct insertion type lock cylinder. Background technique: [0002] A pin lock cylinder disclosed in Chinese utility model patent ZL94242947.8 includes a lock core body and a cover plate. A pin hole is arranged on the lock core body. A spring, a high-groove pin and a low-groove pin are arranged in the pin hole. There is a neck formed by a radial annular groove, the hole of the card key is set between the lock core body and the cover plate, the front and rear translation tongue plates are set in the middle of the lock core body, and the tongue plate is provided with the same number of pins. Consistent gourd-shaped hole, the large end of the gourd-shaped hole allows the pin to pass through, and the small end fits the pin neck. When closed, the neck of the low-groove pin is just inside the gourd-shaped hole of the tongue plate, and the neck of the high-groove pin i...

AI Technical Summary

Problems solved by technology

[0003] 1. Since the tongue plate needs to be pushed by a key, the length of the key hole must be greater than the length of the mating section between the key and the high and low slot pins, that is, the lock cylinder should ensure that the neck of the high slot pin falls on the key when the key is inserted into the key hole. After the gourd-shaped hole is inside, the key can still move forward, which makes the user must be careful and slow every time when inserting the key. Once the force is too large or the speed is too fast, it is easy for the key to slip past the mating position and the high groove The pin has not been pushed in place yet, so the tongue plate cannot move as expected, and the lock cylinder cannot work normally

[0004] 2. When using the lock cylinder, the user needs to tentatively insert the key into a small section first, and then insert the key after the neck of the high-groove pin and the upper end of the low-groove pin are placed in the upper waist hole of the key. pushes forward, making it inconvenient to operate

[0005] 3. Since only the part of the key that cooperates with the pin with the low groove is provided with a waist-shaped hole, and the cooperation with the pin with the high groove is realized through flat abutment, so that the mutual opening rate of the lock cylinder is high, and the anti-theft performance is high. Poor, easy for thieves to imitate

In addition, the flat top is also prone to slipping, and the reliability cannot be guaranteed

[0006] 4. The manufacturing process of the gourd-shaped hole on the tongue plate and the diameter portion on the high and low groove pins is relatively complicated, which brings inconvenience to the processing of the producer and increases the production cost

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