Burglarproof lock core structure
OwnerTsao-Chia Changinventor
Life of this patent
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Abstract
The present invention provides a burglarproof lock core structure which forms a curved passage between a key slot of a plug and a lower pin chamber, such that at least a bending concave surface offsetting the center of the key slot is formed at one side, and cone apexes of a plurality of lower pins are extended out of the lower pin chamber and aligned in the wall edge of the key slot. Moreover, a control valve with a cone apex is located at the other end corresponding to the bending surface inside the key slot, such that a key with curvature corresponding to the passage and notches corresponding to the cone apexes is required to open the lock, thereby having the effect of high security of burglarproof.
Claims6
1-2. (canceled)
A burglarproof lock core structure comprising:
- a) a shell having an upper pin chamber;
- b) a plug inserted into the shell and having:
- i) a lower pin chamber communicating with the upper pin chamber;
- ii) a key slot located on an end thereof located in an open end of the housing;
- iii) a curved passage located on an interior thereof and communicating with the key slot and the lower pin chamber;
- and
- iv) a control valve located in the curved passage opposite the lower pin chamber and having an apex;
- c) a plurality of lower pins located in the lower pin chamber, the plurality of lower pins have lower pin apexes extending into the curved passage a predetermined distance;
- d) a plurality of springs located in the upper pin chamber;
- e) a plurality of upper pins located between the plurality of lower pins and the plurality of springs, the plurality of upper pins being movable between locked and unlocked positions;
- and
- f) an opening key having a curved portion matching the curved passage and being removably inserted therein and a plurality of notches located on the curved portion and selectively aligning with the plurality of lower apexes and the apex of the control valve,
- wherein when the opening key is inserted into the curved portion the plurality of notches positioning the plurality of lower pins in predetermined positions and moving the plurality of upper pins to the unlocked position allowing the plug to be rotated in the shell, and when the opening key is removed from the curved portion the plurality of springs press the plurality of upper pins to the locked position preventing the plug from being rotated in the shell, wherein the lower pins apexes form a curved line when the opening key is removed from the curved passage.
Dependencies are inferred from the claim text.