Controlling mechanism for activation of an air pump to be implemented in an inflatable object

A controlling mechanism for an inflatable object having an air pump selectively operable to deflate and inflate the inflatable object, the controlling mechanism comprising:

• a valve controlling assembly comprising a rotatable valve shaft, a collar and a valve, the valve shaft having an inclined surface formed on a distal end thereof, the collar arranged under the valve shaft and having a roller abutting and slidably engaged with the inclined surface, the valve mounted on a distal end of the collar, arranged such that when the valve shaft is rotated from a first position to a second position, the valve is moved downward by downward movement of the abutting roller along the inclined surface so as to allow fluid communication between the air pump and the inflatable object, and when the valve shaft is oppositely rotated from the second position to the first position, the valve is moved upward by upward movement of the abutting roller along the inclined surface so as to block fluid communication between the air pump and the inflatable object;
• a locking assembly arranged to lock the valve shaft into place when the valve shaft is rotated into the second position;
• a pressure controlling assembly in fluid communication with the inflatable object and comprising a controlling shaft driven to move by air pressure in the inflatable object;
• a linkage assembly arranged between the pressure controlling assembly and the locking assembly;
• and
• wherein the pressure controlling assembly is configured such that when air pressure inside the inflatable object reaches a predetermined high pressure, the pressure controlling assembly drives the linkage assembly to release the valve shaft by movement of the controlling shaft to a first position, and when air pressure inside the inflatable object reaches a predetermined low pressure, the pressure controlling assembly drives the linkage assembly to release the valve shaft by movement of the controlling shaft to a second position.

A controlling mechanism for an inflatable object having an air pump selectively operable to deflate and inflate the inflatable object, the controlling mechanism comprising:

• a valve controlling assembly comprising a rotatable valve shaft, a collar and a valve, the valve shaft having an inclined surface formed on a distal end thereof, the collar arranged under the valve shaft and having a roller abutting and slidably engaged with the inclined surface, the valve mounted on a distal end of the collar, arranged such that when the valve shaft is rotated from a first position to a second position, the valve is moved downward by downward movement of the abutting roller along the inclined surface so as to allow fluid communication between the air pump and the inflatable object, and when the valve shaft is oppositely rotated from the second position to the first position, the valve is moved upward by upward movement of the abutting roller along the inclined surface so as to block fluid communication between the air pump and the inflatable object;
• a locking assembly arranged to lock the valve shaft into place when the valve shaft is rotated into the second position;
• a pressure controlling assembly in fluid communication with the inflatable object;
• a linkage assembly arranged between the pressure controlling assembly and the locking assembly;
• and
• wherein the pressure controlling assembly is configured such that when air pressure inside the inflatable object reaches a predetermined high pressure, the pressure controlling assembly drives the linkage assembly to release the valve shaft, and when air pressure inside the inflatable object reaches a predetermined low pressure, the pressure controlling assembly drives the linkage assembly to release the valve shaft;
• and
• wherein the pressure controlling assembly comprises a compartment, a controlling shaft received in the compartment, a movable membrane received in the compartment and connected to the controlling shaft, the membrane dividing the compartment into a first space in fluid communication with the inflatable object and a second space in fluid communication with ambient, a first auxiliary spring mounted around the controlling shaft in the first space, and a second auxiliary spring mounted around the controlling shaft in the second space, arranged such that movement of the membrane accordingly drives the controlling shaft to move between a neutral position, a first position, and a second position, and the controlling shaft drives the linkage assembly to release the valve shaft when in the first or second position.