Built-in hand pump

Abstract

The invention discloses a built-in hand pump which comprises a pump shell and a push-pull assembly, a one-way valve is installed at a gas outlet of the shell, and the push-pull assembly comprises a push-pull rod and a sealed gas outlet structure; the sealed gas outlet structure comprises a first piston, a second piston and a first sealing piece, the push-pull rod is pulled outwards, the first sealing piece is attached to the end face of the first piston, and external gas enters a first cavity and enters a second cavity through a gas flow channel between the first piston and the first sealing piece; when the push-pull rod is pushed inwards, the first sealing piece is attached to the end face of the second piston, and gas in the second cavity enters a product to be inflated through a gap between the one-way valve and the gas outlet of the pump shell; and therefore, the built-in hand pump can be simplified and ingenious in structural design, inflation of the product to be inflated can be efficiently achieved through the push-pull assembly, during pressure maintaining, the one-way valve and the second sealing ring play a sealing role at the moment, and the sealing performance is improved through multiple sealing.

Description

technical field [0001] The invention relates to the technical field of air pumps, in particular to an air pump. Background technique [0002] The air pump is a key component of various inflatable products (such as air mattresses, inflatable trampoline, inflatable sofas and large inflatable toys). It is installed on the inner side of the soft bladder of the inflatable products. The product performs operations such as rapid inflation, pressure maintenance and rapid deflation, so as to realize the functions of inflatable products for normal use and deflation to reduce the space volume for storage. [0003] The current air pumps are mainly divided into electric air pumps and manual air pumps. The existing manual air pumps are similar in principle to pumps, but the external gas is charged into the product to be inflated by pushing and pulling. The built-in hand pump is to install the manual pump on the product to be inflated. In terms of performance, the performance of the exist...

AI Technical Summary

Problems solved by technology

[0003] The current air pumps are mainly divided into electric air pumps and manual air pumps. The existing manual air pumps are similar in principle to pumps, but the external gas is charged into the interior of the product to be inflated by pushing and pulling. The built-in hand pump is to install the manual pump on the product to be inflated. In terms of performance, the performance of the existing built-in manual pump is not ideal, the inflation efficiency is low, the sealing is also poor, and it is easy to leak after inflation, etc. The overall performance is not ideal.

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