Detent hinge

A detent hinge device comprising:

• a first outer cam component comprising a plurality of splines and a cam face, the first outer cam component having a root diameter and an outer diameter;
• a second outer cam component comprising a plurality of splines and a cam face, the second outer cam component having a root diameter and an outer diameter;
• a first inner cam component comprising a plurality of splines and a cam face, the first inner cam component having a root diameter and an outer diameter;
• a second inner cam component comprising a plurality of splines and a cam face, the second inner cam component having a root diameter and an outer diameter;
• wherein each of the first and second inner and outer cam components are aligned on an axis, wherein the cam faces of the first inner and first outer cam components face each other, and wherein the cam faces of the second inner and second outer cam components face each other;
• an axial spring located between the first and second inner cam components and having an outer diameter, wherein the outer diameter of the spring is larger than the root diameter of the first and second inner cam components thereby engaging the splines of the first and second inner cam components;
• an axial retention fastener securing each of the first and second inner and outer cam components and the axial compression spring on the axis;
• and
• a first outer bracket comprising splines on an inner surface, the first outer bracket containing the first outer cam component such that the splines of the first outer bracket engage the splines of the first outer cam component;
• a second outer bracket comprising splines on an inner surface, the second outer bracket containing the second outer cam component such that the splines of the second outer bracket engage the splines of the second outer cam component;
• a first inner bracket comprising splines on an inner surface, the first inner bracket containing the first inner cam component such that the splines of the first inner bracket engage the splines of the first inner cam component;
• a second inner bracket comprising splines on an inner surface, the second inner bracket containing the second inner cam component such that the splines of the second inner bracket engage the splines of the second inner cam component;
• and
• wherein a common cam component is used for each of the first and second inner and outer cam components.

A hinged system comprising:

• a base;
• a hinged member hinged to the base such that it is rotatable relative to the base;
• and
• a detent hinge device coupled between the base and the hinged member;
• wherein the detent hinge device comprises:
• a first cam component comprising at least one spline drive and an axial cam face, the at least one spline drive located between a root diameter and an outer diameter of the first cam component;
• a second cam component comprising at least one spline drive and an axial cam face, the at least one spline drive located between a root diameter and an outer diameter of the second cam component;
• wherein each of the first and second cam components are aligned on an axis, wherein the cam faces of the first and second cam components face each other;
• an axial spring acting on at least one of the first and second cam components thereby forcing the first and second cam components together;
• an axial retention fastener securing each of the first and second cam components and axial spring on the axis;
• and
• wherein a common cam component is used for each of the first and second cam components and
• wherein the outer diameter of the spring is larger than the root diameter of the first and second cam components thereby engaging the at least one spline drive of the at least one of the first and second cam components.