Self inflatable mattress with at least two isolated chambers

Abstract

A self inflatable mattress includes a main portion with a first chamber and a sponge in the first chamber, an extended portion and having a second chamber, a valve mounted on the main portion to allow surrounding air to enter the first chamber and a unidirectional valve received in the extended portion and sandwiched between the first chamber and the second chamber to provide alternate communication between the first chamber and the second chamber. A self expansion of the main portion due to the automatic expansion of the sponge from a compressed state to a non-compressed state allows the surrounding air to enter the first chamber, the air inside the first chamber is able to be forced to enter the second chamber by pushing away the unidirectional valve to resume communication between the first chamber and the second chamber so that the second chamber is inflated.

1 . A self inflatable mattress comprising: 
 a main portion with a first chamber defined therein and a sponge received in the first chamber so that the first chamber is able to automatically expand when the sponge is released from a compressed state to a non-compressed state;    an extended portion integrally formed with the main portion and having a second chamber to be isolated from the first chamber;    a valve mounted on the main portion to allow surrounding air to enter the first chamber; and    a unidirectional valve received in the extended portion and sandwiched between the first chamber and the second chamber to provide alternate communication between the first chamber and the second chamber such that a self expansion of the main portion due to the automatic expansion of the sponge allows the surrounding air to enter the first chamber, the air inside the first chamber is able to be forced to enter the second chamber by pushing away the unidirectional valve to resume communication between the first chamber and the second chamber so that the second chamber is inflated.    
   
   
       2 . The self inflatable mattress as claimed in  claim 1 , wherein the unidirectional valve has: 
 a bottom plate securely formed on the main portion and having multiple first holes defined to communicate with the second chamber;    a moving plate movably sandwiched between the bottom plate;    a spring having a first end abutted to the moving plate to provide a recovery force to the moving plate after the moving plate is moved and a second end abutted to the bottom plate;    a top plate alternately connected to the moving plate and provided with multiple second holes defined to communicate with the first chamber and the first holes such that the communication between the first holes and the second holes is alternate.    
   
   
       3 . The self inflatable mattress as claimed in  claim 1  further comprising a covering to enclose the main portion and the extended portion.  
   
   
       4 . The self inflatable mattress as claimed in  claim 2  further comprising a covering to enclose the main portion and the extended portion.  
   
   
       5 . A self inflatable mattress comprising: 
 a main portion with a first chamber defined therein and a sponge received in the first chamber so that the first chamber is able to automatically expand when the sponge is released from a compressed state to a non-compressed state;    an extended portion integrally formed with the main portion and having a second chamber to be isolated from the first chamber;    a valve mounted on the main portion to allow surrounding air to enter the first chamber; and    a unidirectional valve received in the main portion to provide alternate communication between the first chamber and the second chamber such that a self expansion of the main portion due to the automatic expansion of the sponge allows the surrounding air to enter the first chamber, the air inside the first chamber is able to be forced to enter the second chamber by pushing away the unidirectional valve to resume communication between the first chamber and the second chamber so that the second chamber is inflated.    
   
   
       6 . The self inflatable mattress as claimed in  claim 5 , wherein the unidirectional valve has: 
 a bottom plate securely formed on the main portion and having multiple first holes defined to communicate with the second chamber;    a moving plate movably sandwiched between the bottom plate;    a spring having a first end abutted to the moving plate to provide a recovery force to the moving plate after the moving plate is moved and a second end abutted to the bottom plate;    a top plate alternately connected to the moving plate and provided with multiple second holes defined to communicate with the first chamber and the first holes such that the communication between the first holes and the second holes is alternate.    
   
   
       7 . The self inflatable mattress as claimed in  claim 5  further comprising a covering to enclose the main portion and the extended portion.  
   
   
       8 . The self inflatable mattress as claimed in  claim 6  further comprising a covering to enclose the main portion and the extended portion.