Ribs formed on two sides of a case are press-fitted into grooves formed in the holding faces of a holding member. Two case bodies constituting the case have rib divisions formed by dividing ribs in their longitudinal directions. Accordingly, the two case bodies are brought into contact with each other in a wide range on the divided surfaces of the rib divisions, the divided surfaces extending in the longitudinal directions. When the ribs are press-fitted into the grooves, the divided surfaces in contact with each other are brought into pressure-contact with each other in a wide range.

The invention relates to a possibly reversible mechanical assembly, comprising a first component (1), a second link itself comprising a stud (3) linked to the first component (1) and formed of a stock (30) terminated by a radial bulge (31), and holding means (4) linked to the second component (2) and comprising a housing (40) dimensioned to receive the stud (3) and at least one elastic lock (41) designed to elastically hold the radial bulge of the stud in the housing (40). According to the invention, the housing (40) is formed by drilling of the second component (2) along its thickness, and each elastic lock (41) is essentially formed by an elastically flexible lug (41) formed in the thickness of the second component (2) and exhibiting a degree of radial play of non-zero amplitude.

An orthopaedic surgical instrument may include an elongated body with a proximal end and distal end. A clamp lever may be pivotally coupled to the proximal end of the elongated body. The clamp lever may be moveable between a locked position and an unlocked position. A biasing element may be configured to bias the clamp lever to the locked position.

A vehicle steering handle, comprising: a steering wheel that is an isosceles trapezoidal annular body composed of an upper bottom portion, a lower bottom portion longer than the upper bottom portion, and left and right leg portions; an accelerator lever attached to the right leg portion; and a brake lever attached to the left leg portion and the right leg portion.