Patent Publication Number: US-8984689-B1

Title: Spring mattress structure

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present disclosure relates to a spring mattress structure, especially a spring mattress structure with springs&#39; bottom ends fixed for steady support. 
     2. Descriptions of the Related Art 
     The main structure of a pocket spring mattress is based on a plurality of spring sets fixed with outlines for development of a top bed surface and a bottom bed surface, each of which is covered by a cushion layer and wrapped by an external coating. 
     For a support purpose, a conventional method to fix and assemble springs depends on adhesion or C-shaped rings with hand tools so that each spring&#39;s two end surfaces are steadily positioned and sustain top-down axial compressive force. 
     However, the method to fix and assemble springs according to either adhesion or C-shaped ring, each of which spends much time, is uneconomic. Accordingly, the present disclosure presents a spring mattress structure which relies on spring-loaded locating pieces to rapidly fix and assemble springs without requirement of any hand tool. 
     Furthermore, the solutions for some issues such as rapid assembly and lowered overall weight not provided in the patent applications U.S. Ser. No. 12/877,275, U.S. Ser. No. 13/028,324 and U.S. Ser. No. 13/534,228 for adjustable softness of a mattress submitted by the applicant on Sep. 8, 2010, are also presented herein. 
     SUMMARY OF THE INVENTION 
     The present disclosure presents a plurality of shaft levers which constitute a bottom bed surface and are separated by a regular spacing between any two adjacent shaft levers wherein the spacing corresponds to each spring&#39;s hollow space and is freely penetrated by each of minor springs hung in the spring&#39;s hollow space. 
     The present disclosure presents spring-loaded locating pieces which are used to quickly fix and assemble springs and shaft levers without requirement of any hand tool. 
     The present disclosure of a spring mattress structure comprises a mattress body which develops a top bed surface and a bottom bed surface and accommodates: a plurality of springs, each of which develops two opposite stress surfaces along a stretching direction, that is, a first stress surface and a second stress surface, wherein the first stress surface and the second stress surface on which a first placement end and a second placement end are designed get close to or contact the top bed surface and the bottom bed surface that is based on a plurality of shaft levers regularly arranged and separated by a spacing between any two adjacent shaft levers, respectively; a plurality of spring-loaded locating pieces, each of which comprises a locating part with a first elastic fastener and a second elastic fastener extending from both sides for development of a clamping space in between. The locating part of the spring-loaded locating piece is fixed on a shaft lever and allows the first elastic fastener and the second elastic fastener to face the top bed surface; each spring has the second stress surface&#39;s first placement end and second placement end placed on two adjacent shaft levers so that the first placement end of one spring and the second placement end of another spring occupy the clamping space developed by the spring-loaded locating piece&#39;s first elastic fastener and second elastic fastener and the first elastic fastener&#39;s fastening block (the second elastic fastener&#39;s fastening block) clamps a spring coil of one spring (another spring) to fix the springs at two adjacent shaft levers and make each spring&#39;s hollow space correspond to a spacing between the adjacent shaft levers. 
     In a preferred embodiment, the locating part of the spring-loaded locating piece develops a positioning space surrounded by at least four borders. 
     In a preferred embodiment, the positioning space is sealed. 
     In a preferred embodiment, the locating part has an opening centrally designed at one border, allowing other two borders near the opening to develop elastic arms to which a shaft lever is directly fastened. 
     In a preferred embodiment, the spring-loaded locating piece comprises the first elastic fastener as well as the second elastic fastener, both of which obliquely extend to each other and have an individual fastening block at top used to clamp a spring coil of one spring. 
     In a preferred embodiment, the spring-loaded locating piece is provided with a spacer block between the first elastic fastener and the second elastic fastener to separate any two springs without entanglement. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view illustrating a spring mattress structure in the present disclosure. 
         FIG. 2  is a partial enlargement view illustrating a spring mattress structure in the present disclosure. 
         FIG. 3  is a sectional view illustrating a spring mattress structure in the present disclosure. 
         FIG. 4  is a top view illustrating a spring mattress structure in the present disclosure. 
         FIG. 5  is a schematic view illustrating minor springs installed in a spring mattress structure in the present disclosure. 
         FIG. 6  is a perspective view illustrating a spring-loaded locating piece used in a spring mattress structure in the present disclosure. 
         FIG. 7  is a schematic view illustrating an alternative structure of a spring-loaded locating piece used in a spring mattress structure in the present disclosure. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The abovementioned and other detailed technical content, features and effects of a spring mattress structure are presented in preferred embodiments and accompanying drawings as follows. 
     Please refer to  FIGS. 1 and 2  which are a perspective view and a partial enlargement view of the present disclosure of a spring mattress structure, respectively.  FIGS. 1 and 2  illustrate a mattress body  1  comprising an outline body  11  with a top border  111  and a bottom border  112  for development of a top bed surface  12  and a bottom bed surface  13 . The bottom bed surface  13  is developed with a plurality of shaft levers  2  separated by a regular spacing  21  between any two adjacent shaft levers  2 ; the shaft lever  2  allows its both ends to be fixed onto the bottom border  112  of the outline body  11  in which a plurality of springs  3  are installed; the spring  3  develops two opposite stress surfaces along a stretching direction, that is, a first stress surface  31  and a second stress surface  32 , wherein the first stress surface  31  and the second stress surface  32  on which a first placement end  321  and a second placement end  322  are designed get close to or contact the top bed surface  12  and the bottom bed surface  13 , respectively. 
     As shown in  FIG. 6 , each of the shaft levers  2  links a plurality of spring-loaded locating pieces  4 , each of which comprises a locating part  41  internally developing a positioning space  412  surrounded by four borders  411 : one of the four borders  411  encircling the locating part  41  extends from its both ends, developing a first elastic fastener  42  and a second elastic fastener  43  which obliquely extend and are opposite to each other; the first elastic fastener  42  (second elastic fastener  43 ) is provided with a fastening block  421  (fastening block  431 ) at top for development of a clamping space  44  between the first elastic fastener  421  and the second elastic fastener  431 ; the border  411  from which the first elastic fastener  42  and the second elastic fastener  43  extend has a spacer block  413  centrally. 
     As shown in  FIGS. 2 ,  3  and  4 , each of the shaft levers  2  penetrates the positioning spaces  412  inside the locating parts  41  of the spring-loaded locating pieces  4  so that the spring-loaded locating pieces  4  are fixed on the shaft lever  2  and allow the first elastic fasteners  42  and the second elastic fasteners  43  to face the top bed surface  12 . 
     In each spring  3 , the first placement end  321  and the second placement end  322  of the second stress surface  32  are positioned at two adjacent shaft levers  2  so that the first placement end  321  of one spring  3  and the second placement end  322  of another spring  3  occupy the clamping space  44  developed by the first elastic fastener  42  and the second elastic fastener  43  of the spring-loaded locating piece  4  and are separated by the spacer block  413  without entanglement of any two springs  3 . Moreover, each spring  3  will be fixed on two adjacent shaft levers  2  and makes its hollow space  33  correspond to the spacing  21  developed by the two adjacent shaft levers  2  when the fastening block  421  of the first elastic fastener  42  and the fastening block  431  of the second elastic fastener  43  clamp the spring coil of one spring  3  and the spring coil of another spring  3 , respectively. As shown in  FIG. 5 , each of minor springs  5  hung in the hollow spaces  33  of the springs  3  is freely activated through the spacing  21  between two adjacent shaft levers  2 . 
     Please refer to  FIG. 7  which is a schematic view illustrating a spring-loaded locating piece in an alternative embodiment of the present disclosure. In the alternative embodiment, the locating part  41 ′ of the spring-loaded locating piece  4 ′ develops an opening  414 ′ at one border  411 ′ so that other two borders  411 ′ near the opening  414 ′ become elastic arms to which the shaft lever  2  is directly fastened.