| 摘要 |
An invisible tooth key includes a key handle (100)?. One end of the key handle (100) is connected with a key rod (300) at least one edge of which is provided with concave teeth?. A key rod shell (200) is slidably arranged outside of the key rod (300). The key rod shell (200) is provided with at least two ball holes (205) corresponding to the concave teeth. The outer openings (206) of the ball holes (205) are retracted inwards to form openings of which the diameters are smaller than the inner diameter of the ball holes (205). The position that the key rod shell (200) slides to the end far away from the key handle (100) is an invisible tooth position, and the position that the key rod shell slides to the end near the key handle is a revealable tooth position. At least one ball hole (205) accommodates locking ball structure (400). At least one ball hole (205) accommodates an invisible tooth ball structure (500). The locking ball structure (400) includes first balls (401) accommodated in the ball holes (205) and elastic balls (402) against to the concave teeth of the key rod (300). The length of the first balls is smaller than the depth of the ball holes (205). One end of the elastic ball (402) is connected with a spring (403). The key teeth can be hidden in the key rod shell (200) when not in use. |
