Joint mechanism and child safety seat

A joint structure for detachably joining a first object to a second object, comprising:

• a fixing part connected to the first object, the fixing part having a fixing part side wall, and the fixing part side wall having an open end and a receiving end opposite to each other;
• an inserting part connected to said second object, the inserting part having an inserting part side wall, and the inserting part being inserted into the fixing part side wall along an insertion direction through the open end, such that the second object is jointed to the first object;
• and
• a release button on the inserting part side wall and partially inserted in the inserting part, wherein the release button is slidable between a locked position away from the inserting part and a release position close to the inserting part in a direction different from the insertion direction of the inserting part, so as to selectively lock the inserting part to the fixing part.

A child safety seat, comprising:

• a seat body;
• a canopy configured to join to an upper part of the seat body;
• and
• two joint structures, the two joint structures being on different sides of the seat body for detachably joining the seat body and the canopy,
• wherein
• each of the two joint structures comprises:
• a fixing part connected to the seat body, the fixing part having a fixing part side wall, and the fixing part side wall having an open end and a receiving end opposite to each other, the receiving end of the fixing part being embedded into the seat body, and the open end of the fixing part being exposed out of the seat body;
• an inserting part connected to the canopy, the inserting part having an inserting part side wall, and the inserting part being inserted into the fixing part side wall along an insertion direction through the open end, such that the canopy is jointed to the seat body;
• the canopy comprises a first canopy rod and a second canopy rod, each of the two joint structures comprises a first canopy rod fixing member and a second canopy rod fixing member, wherein the first canopy rod fixing member is on the inserting part, and the second canopy rod fixing member is pivotally connected to the first canopy rod fixing member;
• and
• different ends of the first canopy rod are connected to corresponding first canopy rod fixing members of the two joint structures, and different ends of the second canopy rod are connected to corresponding second canopy rod fixing members of the two joint structures, so that the second canopy rod is rotatable about an axis parallel to the insertion direction of the inserting part with respect to the first canopy rod.