A connector for coupling with an adapter, comprising: at least one connector body each having a first end capable of being inserted into the adapter; at least one locking mechanism each comprising: a slanting arm extending slantingly and upwardly from the respective connector body; at least one locking protrusion configured to extend from sides of the slanting arm to lock the connector body into locking grooves of the adapter; and a driving arm having a first end connected to the slanting arm; and a boot movably engaged with the connector body, wherein a second end of the driving arm is connected to the boot and is movable together with the boot to drive the slanting arm connected with the first end of the driving arm to approach a horizontal direction, when an angle between the slanting arm and the horizontal direction becomes smaller than a predetermined angle, the locking protrusion starts to be separated from the locking groove of the adapter, so that an interlock between the connector body and the adapter is unlocked, characterized in that the connector further comprises an automatic restoration mechanism configured to restore the boot to an initial position, approaching the connector body, after an external force exerted on the boot for moving it relative to the connector body disappears; and an engagement device movably inserted into the boot, wherein a second end of the connector body opposite to the first end is inserted into the engagement device, and wherein the automatic restoration mechanism is mounted on the engagement device and generates elastic deform with a movement of the boot relative to the engagement device. at least one connector body each having a first end capable of being inserted into the adapter; at least one locking mechanism each comprising: a slanting arm extending slantingly and upwardly from the respective connector body; at least one locking protrusion configured to extend from sides of the slanting arm to lock the connector body into locking grooves of the adapter; and a driving arm having a first end connected to the slanting arm; and a boot movably engaged with the connector body, wherein a second end of the driving arm is connected to the boot and is movable together with the boot to drive the slanting arm connected with the first end of the driving arm to approach a horizontal direction, when an angle between the slanting arm and the horizontal direction becomes smaller than a predetermined angle, the locking protrusion starts to be separated from the locking groove of the adapter, so that an interlock between the connector body and the adapter is unlocked, characterized in that the connector further comprises an automatic restoration mechanism configured to restore the boot to an initial position, approaching the connector body, after an external force exerted on the boot for moving it relative to the connector body disappears; and an engagement device movably inserted into the boot, wherein a second end of the connector body opposite to the first end is inserted into the engagement device, and wherein the automatic restoration mechanism is mounted on the engagement device and generates elastic deform with a movement of the boot relative to the engagement device. a slanting arm extending slantingly and upwardly from the respective connector body; at least one locking protrusion configured to extend from sides of the slanting arm to lock the connector body into locking grooves of the adapter; and a driving arm having a first end connected to the slanting arm; and a boot movably engaged with the connector body, wherein a second end of the driving arm is connected to the boot and is movable together with the boot to drive the slanting arm connected with the first end of the driving arm to approach a horizontal direction, when an angle between the slanting arm and the horizontal direction becomes smaller than a predetermined angle, the locking protrusion starts to be separated from the locking groove of the adapter, so that an interlock between the connector body and the adapter is unlocked, characterized in that the connector further comprises an automatic restoration mechanism configured to restore the boot to an initial position, approaching the connector body, after an external force exerted on the boot for moving it relative to the connector body disappears; and an engagement device movably inserted into the boot, wherein a second end of the connector body opposite to the first end is inserted into the engagement device, and wherein the automatic restoration mechanism is mounted on the engagement device and generates elastic deform with a movement of the boot relative to the engagement device.