Locking device

A locking device, wherein the locking device comprises:

• a mounting seat, fixed to a first object, the mounting seat including:
• a base portion, fixed to the first object;
• a column portion, extending from an end face of the base portion along an axial direction perpendicular to the end face;
• a shaft hole, extending along the axial direction, located at a center of the column portion, and passing through the mounting seat;
• and
• at least one limiting protrusion, extending from an outer periphery of a middle section of the column portion along a transverse direction perpendicular to the axial direction, so as to form a rotation space among the column portion, the at least one limiting protrusion, and the base portion;
• a locking member, rotatable around the axial direction and movable in the axial direction, and arranged on the mounting seat, when the locking member is in a first axial position and a first rotational position in respect to the mounting seat, the locking member is retracted into the mounting seat along the axial direction, and the mounting seat prevents the locking member from rotating around the axial direction, and when the locking member is in a second axial position and a second rotational position in respect to the mounting seat, at least a portion of the locking member extends in the axial direction from the mounting seat, to be inserted into and engaged with a second object, and the mounting seat prevents the locking member from moving in the axial direction, the locking member further comprising:
• a knob, sleeved on an outer side of the mounting seat, having a knob first end and a knob second end opposite to each other along the axial direction, and the knob second end is open toward the mounting seat,
• a locking bar, inserted in the shaft hole of the mounting seat, having a locking bar first end and a locking bar second end opposite to each other along the axial direction, the locking bar first end is fixed to the knob, and the locking bar second end is able to be retracted into or extended out the mounting seat from the knob second end along the axial direction,
• the locking bar further includes a bar head formed at the locking bar second end and extending transversally,
• a fixing hole shaped corresponding to the bar head is formed on the second object, and
• wherein when the locking member is in the first rotational position, relative positions of the bar head and the fixing hole are corresponding to each other, so as to allow the locking member to pass through the fixing hole, and when the locking member is in the second rotational position, the relative positions of the bar head and the fixing hole are not corresponding to each other, so as to prevent the locking member from passing through the fixing hole, such that the bar head is able to be fixed to the second object;
• and
• a compression torsional spring, disposed between the mounting seat and the locking member, biasing the locking member toward the first axial position and the second rotational position;
• wherein when the locking member is in the second axial position and the first rotational position, the compression torsional spring urges the locking member to rotate toward the second rotational position;
• wherein an inner wall of the knob of the locking member is provided with at least one first clamping block protruding transversally inward and at least one second clamping block protruding transversally inward and spaced apart from the at least one first clamping block in a circumferential direction;
• wherein the at least one first clamping block extends axially a first length from the knob second end toward the knob first end, and the at least one second clamping block extends axially a second length less than the first length from the knob second end toward the knob first end;
• and
• wherein positions and lengths of the at least one first clamping block and the at least one second clamping block in respect to the at least one limiting protrusion are arranged such that:
• when the locking member is in the first axial position, both the at least first clamping block and the at least one second clamping block are obstructed by the at least one limiting protrusion in a circumferential direction around the axial direction, such that the locking member is unable to rotate, and
• when the locking member is in the second axial position, the at least one first clamping block is obstructed by the at least one limiting protrusion in one rotational direction along the circumferential direction, causing the locking member to be able to rotate in the other rotational direction along the circumferential direction, such that the at least one second clamping block is located in the rotation space and obstructed by the at least one limiting protrusion in the axial direction.