Air pump

Abstract

An air pump including an air inlet and outlet provided on housing, the housing connecting sealing assembly capable of sealing air outlet, and a rotary bracket disposed inside housing, capable of driving the sealing assembly to open or seal air outlet when rotating. The sealing assembly includes a cover body connected to housing and provided with an airflow passage communicating with air outlet, the sealing assembly further includes sealing bracket capable of being pushed by rotary bracket and sliding horizontally relative to housing when the rotary bracket rotates. The sealing bracket includes sealing body with at least two contacting bars of an array in a circumferential direction contacting rotary bracket, the sealing bracket has a sealing ring capable of being in sealing contact with housing and being detached from housing when sealing bracket slides, a spring for pressing the sealing bracket toward housing is disposed between sealing and cover body.

1 . An air pump, comprising a housing, the housing is provided with an air inlet and an air outlet, a pumping assembly is disposed inside the housing enabling the air to flow between the air inlet and the air outlet, wherein the housing is connected with a sealing assembly capable of sealing the air outlet, and a rotary bracket is also disposed inside the housing, capable of driving the sealing assembly to open or close the air outlet when rotating, the sealing assembly includes a cover body fixedly connected to the housing and the cover body is provided with an airflow passage communicating with the air outlet, the sealing assembly further includes a sealing bracket capable of being pushed by the rotary bracket and sliding horizontally relative to the housing when the rotary bracket rotates, the sealing bracket includes a sealing body provided with at least two contacting bars of an array in a circumferential direction connected with the rotary bracket, the sealing bracket is provided with a sealing ring capable of being in sealing contact with the housing and being detached from the housing when the sealing bracket slides, a spring for pressing the sealing bracket toward the housing is disposed between the sealing body and the cover body. 
     
     
         2 . The air pump according to  claim 1 , wherein the spring is located at the outside of the housing. 
     
     
         3 . The air pump according to  claim 1 , wherein the rotary bracket connected with a rotary button which is exposed out of the housing. 
     
     
         4 . The air pump according to  claim 3 , wherein the air inlet is arranged on the rotary button. 
     
     
         5 . The air pump according to  claim 1 , wherein the rotary bracket includes a rotary body provided with a concave groove/concave grooves, and the concave groove has an inclined groove wall or a cambered groove wall, when the rotary bracket rotates, the groove wall of the concave groove pushes/the groove walls of the concave grooves push the sealing bracket to move horizontally. 
     
     
         6 . The air pump according to  claim 5 , wherein the pumping assembly is disposed on the rotary bracket. 
     
     
         7 . The air pump according to  claim 1 , wherein the housing is provided with guiding holes, and the contacting bars pass through the guiding holes respectively. 
     
     
         8 . The air pump according to  claim 1 , wherein the sealing ring includes an annular ring body having two annular sealing convex ribs projecting to one side, and an annular gap is formed between the two sealing convex ribs. 
     
     
         9 . The air pump according to  claim 8 , wherein the hardness of the sealing convex ribs is lower than the hardness of the ring body.