A plug and socket device, comprising: - at least one housing, and - one base plate for accommodating the at least one housing, wherein - the housing comprises one base body and at least two locking means located thereon, wherein - the locking means in each case have one elongated locking arm and one locking hook, wherein - the base plate has at least one locking nose corresponding to the locking means characterized in that - each locking nose comprising two side ramp surfaces (312, 313) opposite to each other increasingly divergent from top down in the direction of the base plate and the locking surface at the base side of the nose is formed such that in a fully plugged-in position of the housing and the base plate the locking hooks engage behind the locking nose such that a positive locking is established between the locking means and the locking nose, so that an unintentional detachment of the plug and socket device is made difficult, wherein the base plate in addition has at least one securing element, wherein the securing element with a pyramided-like shape comprising a first ramp and two side ramp surface (323, 324) and a lower base side is designed such that the securing element prevents the removal of the locking hook and thus in the fully plugged-in position serves to secure the position of the locking means; wherein the two side ramp surfaces (312, 313) of each locking nose and the two side ramp surfaces (323, 324) of the securing element are designed such that during the plugging together of the housing and the base plate the securing element starting from a starting position causes an elastic deformation of the locking means in a first plane, so that the housing is plugged into the base plate against a resistance caused by said elastic deformation; wherein a rear engagement (a), defined by the portion of locking hook behind the locking surface of the locking nose is greater than lateral distance (d) between the securing element and the locking nose, such that the securing element in the fully plugged-in position prevents an elastic deformation of the locking means in the first plane; whereby the first ramp surface of the securing element is formed such that during the plugging together of the housing and the base plate the securing element causes an elastic deformation of the locking means in a second plane, which is perpendicular to the first plane; and wherein the base plate has at least four locking noses, which correspond to four locking means of the housing, wherein in the fully plugged-in position each securing element is arranged between two of the four locking means and in each case one locking hook engages behind a locking nose. - at least one housing, and - one base plate for accommodating the at least one housing, wherein - the housing comprises one base body and at least two locking means located thereon, wherein - the locking means in each case have one elongated locking arm and one locking hook, wherein - the base plate has at least one locking nose corresponding to the locking means characterized in that - each locking nose comprising two side ramp surfaces (312, 313) opposite to each other increasingly divergent from top down in the direction of the base plate and the locking surface at the base side of the nose is formed such that in a fully plugged-in position of the housing and the base plate the locking hooks engage behind the locking nose such that a positive locking is established between the locking means and the locking nose, so that an unintentional detachment of the plug and socket device is made difficult, wherein the base plate in addition has at least one securing element, wherein the securing element with a pyramided-like shape comprising a first ramp and two side ramp surface (323, 324) and a lower base side is designed such that the securing element prevents the removal of the locking hook and thus in the fully plugged-in position serves to secure the position of the locking means;