Coordinative control method for the back and knee bottom sections of a bed or the like

Abstract

A coordinative control method for the back and knee bottom sections of a bed or the like, characterized in that when the back bottom section and the knee bottom section are operated in a coordinative manner, the back bottom section or the knee bottom section is actuated for adaptation to ensure that an action can be carried out based on a preset action pattern starting from the present state of positions.

1 . A coordinative control method for back and knee bottom sections of a bed using a control means comprising a user control means, a computer programmable storage means having a preset action pattern stored therein, a back lifting mechanism, a knee lifting mechanism and a rotation quantity detecting means, the method comprising: 
 a first step of lifting the knee bottom section to a predetermined angle of about 0 to 30 degrees;    a second step of lifting the back bottom section to an angle of about 15 to 65 degrees, the second step being begun after, but during, the first step when the knee bottom section reaches an angle of about 15 degrees;    a third step of lowering the knee bottom section to an angle of about 0 to 15 degrees;    a fourth step of lifting the back bottom section to an angle of about 55-60 degrees;    a fifth step of lowering the knee bottom section to an angle of about 0 degrees; and    a sixth step of lifting the back bottom section to an angle of about 60-78 degrees.    
   
   
       2 . A coordinative control method for back and knee bottom sections of a bed wherein the back bottom section and knee bottom section are lifted and lowered in a coordinative operation so that an inclination angle of the back and knee bottom sections is controlled to follow a preset correlative position control pattern.  
   
   
       3 . A coordinative control method for back and knee bottom sections of a bed wherein when the back and knee bottom sections are to be operated in a coordinative manner starting from any starting position other than a preset correlative position control pattern, the back and knee bottom sections are controlled to aim at a nearest action change point of the knee bottom section on a preset control pattern, in order to let the bottom sections act based on said control pattern.  
   
   
       4 . The method of  claim 1 , wherein, if the knee lifting angle is 0 to 15 degrees while the back lifting angle is 0 to 15 degrees at the time of starting of a back lifting step, then knee lifting is begun.  
   
   
       5 . The method of  claim 1 , wherein, if the knee lifting angle is 15 to 30 degrees while the back lifting angle is 0 to 15 degrees at the time of starting of a back lifting step, and the back lifting angle is larger than a preset knee lifting angle in the respective preset action pattern, then knee lifting is begun.  
   
   
       6 . The method of  claim 1 , wherein, if the knee lifting angle is 15 to 30 degrees while the back lifting angle is 0 to 15 degrees at the time of starting of a back lifting step, and the back lifting angle is smaller than the preset knee lifting angle in the respective preset action pattern, then back lifting is begun.  
   
   
       7 . The method of  claim 1 , wherein, if the knee lifting angle is 0 to 30 degrees while the back lifting angle is 15 to 40 degrees at the time of starting of a back lifting step, then knee lifting is begun.  
   
   
       8 . The method of  claim 1 , wherein, if the knee lifting angle is 0 to 15 degrees while the back lifting angle is 40 to 65 degrees at the time of starting of a back lifting step, then back lifting is begun.  
   
   
       9 . The method of  claim 1 , wherein, if the knee lifting angle is 15 to 30 degrees while the back lifting angle is 40 to 55 degrees at the time of starting of a back lifting step, and the back lifting angle is smaller than the preset knee lifting angle in the respective preset action pattern, then back lifting is begun.  
   
   
       10 . The method of  claim 1 , wherein, if the knee lifting angle is 15 to 30 degrees while the back lifting angle is 40 to 55 degrees at the time of starting of a back lifting step, and the back lifting angle is larger than the preset knee lifting angle in the respective preset action pattern, then a knee lowering step is begun.  
   
   
       11 . The method of  claim 1 , wherein, if the knee lifting angle is 15 to 30 degrees while the back lifting angle is 55 to 78 degrees, then knee lowering is begun.  
   
   
       12 . The method of  claim 1 , wherein, if the knee lifting angle is 0 to 20 degrees while the back lifting angle is 65 to 78 degrees, and the back lifting angle is larger than the preset knee lifting angle of the respective preset action pattern, then back lifting is begun.  
   
   
       13 . The method of  claim 1 , wherein, if the knee lifting angle is 0 to 20 degrees while the back lifting angle is 65 to 78 degrees, and the back lifting angle is smaller than the preset knee lifting angle of the respective preset action pattern, then knee lowering is begun.  
   
   
       14 . The coordinative control method of  claim 2 , wherein the preset correlative position control pattern is stored in a control means.  
   
   
       15 . The coordinative control method of  claim 2 , wherein a preset correlative position control pattern corresponds to a pattern as in  FIG. 9 .  
   
   
       16 . the coordinative control method of  claim 14 , wherein the control means stores a control pattern as in  FIG. 9 .  
   
   
       17 . The coordinative control method of  claim 3 , wherein a starting position of the back and knee bottom sections is first detected by a position detecting means.  
   
   
       18 . The coordinative control method of  claim 17 , wherein a control means compares the starting position information from the position detecting means with a preset correlative position control pattern stored in the control means to determine if the starting position corresponds to any point on the preset correlative position control pattern.  
   
   
       19 . The coordinative control method of  claim 18 , wherein the control means aims the back and knee bottom sections at a nearest action conversion point of a knee bottom section action pattern.  
   
   
       20 . The coordinative control method of  claim 3 , wherein the preset correlative position control pattern corresponds to a pattern as in  FIG. 9 .