Shoe automatic inflatable cushion system

Abstract

A shoe automatic inflatable cushion system is applied to a shoe which includes a shoe body and a bottom part connected therewith. When a weight sensor disposed on the bottom part detects a load, a control module receives an enabling signal and accordingly drives an air pump to operate, so that an inflatable cushion disposed in the shoe body is inflated and expanded. When an air pressure sensor detects the pressure inside the inflatable cushion higher than a specified threshold interval, the air pressure sensor sends a disabling signal to the control module, and the control module receives a disabling signal and accordingly stops operation of the air pump.

What is claimed is: 
     
         1 . A shoe automatic inflatable cushion system applied to a shoe, wherein the shoe comprises a shoe body and a bottom part connected therewith, by which a wear space and an opening communicated therewith are collaboratively defined, the shoe automatic inflatable cushion system comprising:
 an inflatable cushion disposed in the shoe body;   an air passage arranged between the inflatable cushion and the shoe body and communicated with the inflatable cushion;   an air pump communicated with the air passage;   a weight sensor disposed on the bottom part;   an air pressure sensor disposed in the air passage; and   a control module electrically connected with the air pump, the weight sensor, and the air pressure sensor;   wherein the weight sensor sends an enabling signal to the control module when detecting a load, and the control module accordingly drives the air pump to operate, making air guided by the air passage and introduced into the inflatable cushion so that the inflatable cushion is inflated and expanded, wherein when the air pressure sensor detects the pressure inside the inflatable cushion higher than a specified threshold interval, the air pressure sensor sends a disabling signal to the control module, and that the control module accordingly stops operation of the air pump.   
     
     
         2 . The shoe automatic inflatable cushion system according to  claim 1  further comprising a relief valve disposed on a surface of the shoe body, and the relief valve is communicated with the air passage. 
     
     
         3 . The shoe automatic inflatable cushion system according to  claim 2 , wherein the relief valve is manually actuated to discharge the air from the shoe automatic inflatable cushion system. 
     
     
         4 . The shoe automatic inflatable cushion system according to  claim 2 , wherein the relief valve is electrically connected with the control module, and when the weight sensor detects loss or disappearance of the weight of the load, the weight sensor sends a pressure relief signal to the control module, and the control module accordingly drives the relief valve to discharge the air from the shoe. 
     
     
         5 . The shoe automatic inflatable cushion system according to  claim 1 , wherein the air pump is a piezoelectric air pump. 
     
     
         6 . The shoe automatic inflatable cushion system according to  claim 5 , wherein the piezoelectric air pump comprises:
 a gas inlet plate comprising at least one inlet, at least one convergence channel and a central cavity, wherein a convergence chamber is defined by the central cavity, and the at least one convergence channel corresponds to the at least one inlet, wherein after the air is introduced into the at least one convergence channel through the at least one inlet, the air is guided by the at least one convergence channel and converged to the convergence chamber;   a resonance plate having a central aperture, wherein the central aperture is aligned with the convergence chamber, wherein the resonance plate comprises a movable part near the central aperture; and   a piezoelectric actuator aligned with the resonance plate, wherein a gap is formed between the resonance plate and the piezoelectric actuator to define a first chamber, wherein when the piezoelectric actuator is driven, the air is introduced into the air pump through the at least one inlet of the gas inlet plate, converged to the central cavity through the at least one convergence channel, transferred through the central aperture of the resonance plate, and introduced into the first chamber, wherein the air is further transferred through a resonance between the piezoelectric actuator and the movable part of the resonance plate.   
     
     
         7 . The shoe automatic inflatable cushion system according to  claim 6 , wherein the piezoelectric actuator comprises:
 a suspension plate having a first surface and a second surface, wherein the suspension plate is permitted to undergo a curvy vibration;   an outer frame arranged around the suspension plate;   at least one bracket connected between the suspension plate and the outer frame for elastically supporting the suspension plate; and   a piezoelectric plate, wherein a length of the piezoelectric plate is smaller than or equal to a length of the suspension plate, and the piezoelectric plate is attached on the first surface of the suspension plate, wherein when a voltage is applied to the piezoelectric plate, the suspension plate is driven to undergo the curvy vibration.   
     
     
         8 . The shoe automatic inflatable cushion system according to  claim 7 , wherein the suspension plate is a square suspension plate with a bulge. 
     
     
         9 . The shoe automatic inflatable cushion system according to  claim 6 , wherein the piezoelectric air pump further comprises a conducting plate, a first insulation plate and a second insulation plate, wherein the gas inlet plate, the resonance plate, the first insulation plate, the conducting plate and the second insulation plate are stacked on each other sequentially. 
     
     
         10 . The shoe automatic inflatable cushion system according to  claim 1 , wherein the control module comprises a battery to provide electric power to the control module.