The invention relates to a locking device for the controlled locking and unlocking of authorized objects, meant to be used in particular within bicycle clamping and securing mechanisms of automatic systems, such as automatic bicycle rental stations. According to the invention, the device comprises a housing (1) consisting of a base plate (2) and a top plate (3), a rotary latch (5) which can move between an unlocked position and a locked position and an actuator controlled by an electronic control circuit, the device also comprising an anti-locking lever (8) which may rotate inside the locking device in the horizontal plane and which has a free end (8c) that can enter an anti-locking shoulder (5b) of the said rotary latch (5) for securing the locking device in the unlocked position, as well as an anti-unlocking lever (9) which may rotate inside the locking device in the horizontal plane and which has a free end (9c) that can enter an anti-unlocking shoulder (5d) of the said latch (5), for securing the locking device in the locked position, the said anti-locking lever (8) and anti-unlocking lever (9) being linked to each other by a traction spring (11) ensuring pulling of the two levers towards each other and maintaining them in this position, so that, in any moment, the end (8c or 9c) of only one of the said securing levers (8 or 9) is accommodated inside of the said blocking shoulder (5b or 5d) of the said rotary latch (5), while the respective free end (9c or 8c) of the other respective securing lever (9 or 8) is located outside the respective securing shoulder (5d or 5b) of the said latch (5), these positioning options making impossible the locking device to unlock or lock.
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