Movement and elastic abutting device of a two link mechanism

A movement device having a two link mechanism, comprising:

• a frame unit defining a major axis direction;
• a first movement unit including a first positioning portion and a first pin joint portion disposed correspondingly to the first positioning portion, and the first positioning portion being pin-jointed with the frame unit;
• a second movement unit including a second pin joint portion and a second positioning portion disposed correspondingly to the second pin joint portion, wherein the second positioning portion is slidably disposed on the frame unit, so that the second movement unit is moved toward or away from the first positioning portion along the major axis direction;
• and
• an elastic abutting device comprising:
• a base member disposed on the first movement unit or on the second movement unit, wherein the base member has an accommodating groove;
• a bearing member disposed in the accommodating groove, wherein the bearing member has a first propping portion, a second propping portion corresponding to the first propping portion, and a through hole, the first propping portion and the second propping portion cooperatively define a receiving space, the through hole is disposed on the second propping portion, the through hole is disposed on the second propping portion, and the receiving space and the through hole are communicated with each other;
• a latch member defining a central axis, the latch member having an abutting portion which is partly exposed out of the through hole and a retaining portion which is disposed correspondingly to the abutting portion, wherein the retaining portion has a propping surface and a stopping surface corresponding to the propping surface;
• and
• an elastic member disposed between the first propping portion and the second propping portion, wherein two opposite terminal ends of the elastic member respectively have a first side end portion and a second side end portion disposed correspondingly to the first side end portion;
• wherein the retaining portion is disposed between the elastic member and the second propping portion, the first side end portion is propped against the first propping portion, and the second side end portion is propped against the propping surface of the latch member, so that the latch member is abutted against by the elastic member and the frame unit to reciprocate between a first position and a second position relative to the base member along the central axis.