The term mechanism is designated as that set of elements, mostly rigid, whose reason for being to transmit or start a movement.
Among the fundamental and characteristic components of a mechanism we find the following: link, which is that rigid element that serves to transmit the movement that will lead to the operation of the mechanism in question; the node, that element of a link that is used to join another link and the Joint or Kinematic Pair, which is the element that indicates the union of two or more links.
On the other hand, the links that intervene in a mechanism can be classified according to the number of nodes they hold in binary, ternary or quaternary, according to the function they perform in fixed, conductor, transducer and driven and according to the movement they cause. in fixed, crank, connecting rod and slide.
Meanwhile, each of these nodes that we mentioned above, have different movements. For example, the crank presents a rotary movement, the slide will make the movement known as translation, the connecting rod will represent the general plane movement, the driver will be the one that will initiate the movement of all, the driver that receives the movement of the driver and the transducer that has the mission of communicating the driver with the driven. Among the most common examples of mechanisms that we can usually deal with, we can cite the one exerted by the windshield wipers of a car, the back and forth movement to remove the water from the surface of the glass of a vehicle, is carried out thanks to to the design of a mechanism like the one described above.
In an absolutely opposite path and that has nothing to do with what we have been commenting on, there are the defense mechanisms, which have a special significance and importance in the field of psychology that defines them as those cognitive operations that people perform at a certain moment to defend themselves against some question or danger that threatens them.
For example, a person who suffered various and continued love deception every time he was involved in a romantic relationship, surely, the next time he is faced with the possibility of getting involved with someone, he will unconsciously tend to boycott the relationship through different actions. so as not to suffer again.
