One-way unlocking device, vehicle door arrangement and vehicle

Abstract

One-way unlocking device, characterized in that it comprises: a first latch (110);a linkage assembly comprising a first linkage (210), a second linkage (220), a third linkage (230), and a fourth linkage (240), wherein the first linkage (210), the second linkage (220), and the fourth linkage (240) are coaxially pivotally connected to a sliding door, wherein one end of the first linkage (210) is used to trigger a lock assembly and another end is provided with a first sliding groove, wherein the second linkage (220) is provided with a second sliding groove A and a second sliding groove B, the second sliding groove A being in contact with the second sliding groove B, wherein one end of the first bolt (110) is slidably inserted into the first sliding groove, while another end of the first bolt (110) is slidably inserted into the second sliding groove A, wherein the first linkage (210) and the second linkage (220) are movable relative to each other;wherein, when the other end of the first bolt (110) is slidably inserted into the second sliding groove B, the first linkage (210) and the second linkage (220) move synchronously, wherein the third linkage (230) can push the first bolt (110) into the second sliding groove A; wherein the fourth linkage (240) can, during a rotational movement, first rotate the second linkage (220) and then the third linkage (230).