Spring having positioning ring and elastic mattress

One or more springs each having at least one positioning ring, each of the springs comprising:

• a spring body having a spiral shape formed by winding, wherein:
• two ends of the spring body are wound to form two end surface rings,
• the spring body comprises the at least one positioning ring,
• the at least one positioning ring is a winding ring of the spring body,
• the at least one positioning ring is substantially parallel to the two end surface rings or is substantially perpendicular to a direction of an elastic force of the spring body,
• the at least one positioning ring is disposed at a middle of the spring body,
• the at least one positioning ring secures one or more connecting waist rings,
• a first one of the one or more connecting waist rings on a first one of the one or more springs is connected to a second one of the one or more connecting waist rings on a second one of the one or more springs adjacent to the first one of the one or more springs,
• the at least one positioning ring is at least spaced apart from a stressing end of the spring body for ¼ of a length of the one or more springs,
• the one or more connecting waist rings comprise at least two connecting waist rings,
• the at least one positioning ring comprises a plurality of positioning rings,
• the at least two connecting waist rings are respectively buckled to the spring body through the plurality of positioning rings,
• an inner wall of the at least two connecting waist rings comprises positioning grooves parallel to the plurality of positioning rings,
• widths of the positioning grooves are no more than heights of the plurality of positioning rings after being compressed, and
• the plurality of positioning rings are buckled to inner sides of the positioning grooves.

At least two springs each having at least one positioning ring, each of the at least two springs comprising:

• a spring body having a spiral shape formed by winding, wherein:
• two ends of the spring body are wound to form two end surface rings,
• the spring body comprises the at least one positioning ring,
• the at least one positioning ring is a winding ring of the spring body,
• the at least one positioning ring is substantially parallel to the two end surface rings or is substantially perpendicular to a direction of an elastic force of the spring body,
• the at least one positioning ring is disposed at a middle of the spring body,
• the at least one positioning ring secures one or more connecting waist rings,
• a first one of the one or more connecting waist rings on a first one of the at least two springs is connected to a second one of the one or more connecting waist rings on a second one of the at least two springs adjacent to the first one of the at least two springs,
• the at least one positioning ring is at least spaced apart from a stressing end of the spring body for ¼ of a length of the at least two springs,
• each of the at least two springs comprises the one or more connecting waist rings,
• the at least one positioning ring is buckled to one or more inner walls of the one or more connecting waist rings,
• one or more outer walls of the one or more connecting waist rings each comprises a connecting structure,
• two of the at least two springs are connected through the connecting structure of the first one of the at least two springs and the connecting structure of the second one of the at least two springs adjacent to the first spring,
• the at least one positioning ring comprises two positioning rings,
• the inner wall of the one or more connecting waist rings comprises two positioning protrusions along the direction of the elastic force of the spring body, and
• the two positioning protrusions are buckled to the two positioning rings.

One or more springs each having at least one positioning ring, each of the springs comprising:

• a spring body having a spiral shape formed by winding, wherein:
• two ends of the spring body are wound to form two end surface rings,
• the spring body comprises the at least one positioning ring,
• the at least one positioning ring is a winding ring of the spring body,
• the at least one positioning ring is substantially parallel to the two end surface rings or is substantially perpendicular to a direction of an elastic force of the spring body,
• the at least one positioning ring is disposed at a middle of the spring body,
• the at least one positioning ring secures one or more connecting waist rings,
• a first one of the one or more connecting waist rings on a first one of the one or more springs is connected to a second one of the one or more connecting waist rings on a second one of the one or more springs adjacent to the first one of the one or more springs,
• the at least one positioning ring is at least spaced apart from a stressing end of the spring body for ¼ of a length of the one or more springs,
• the one or more connecting waist rings comprise at least two connecting waist rings,
• the at least one positioning ring comprises two positioning rings,
• the at least two connecting waist rings are respectively buckled to the spring body through the two positioning rings,
• an inner wall of each of the at least two connecting waist rings comprises two positioning protrusions along the direction of the elastic force of the spring body, and
• the two positioning protrusions are buckled to the two positioning rings.