Patent ID: 9156051
Filing Date: 2015-10-13
Classification: B05B

Abstract:
1. A hand held shower head with filter replacing pre-alarm device comprises a shower head shell, a handle filter, an internal lid, an impeller, a hood, a detachable alerting pod and a signal circuit device, wherein: said shower head shell, which is a plastic hollow casing extruded into unitary piece having a mantle encompassed an obverse side with a set of rim male threads and a reverse side as an integral body, has a handle butt with a set of tubular threads formed on the tapered peripheral thereof, a hollow water entry created in the handle butt, a receptacle inwardly created into the obverse side, a water exit bore base and an impeller well with an impeller hub notch further inwardly created into internal bottom of the receptacle, and a water inlet channel created to communicate between the hollow water entry in the handle butt and the adjacent side of the impeller well while a water outlet channel created to communicate between the water exit bore base and the other side of the impeller well; said handle filter is a filter cartridge disposed in a detachable handle with a set of female threads formed in jointing end section thereof to be mated with the set of tubular threads of the handle butt; said internal lid, which is a planiform disk tightly attached on the bottom side of the receptacle in the shower head shell, has an inward surface facing toward the obverse side of the shower head shell, an impeller hub notch created therein to correspond with the impeller hub notch of the impeller well, a water outlet created therein to correspond with the water exit bore base of the receptacle in the shower head shell, and a plurality of screw holes peripherally created the marginal rim thereof such that the screw holes spread around the impeller hub notch and water outlet; said impeller, which is a cylindrical profile body with plural curved vanes equivalently extending radically, has two central protruding hubs being coaxially disposed at top side and bottom side thereof respectively, and a magnetic element embedded in the top cut of one vane such that the impeller is freely rotatable in the impeller well by means of two central protruding hubs being mated with the impeller hub notch of the impeller well and the impeller hub notch of the internal lid respectively; and said hood, which is a plastic disk extruded into unitary piece, has a hoop female threads created around the bottom rim thereof and a plurality of water spray holes spread over the surface thereof so that the hoop female threads can mate with the rim male threads on the obverse side of the shower head shell by screwing engagement; wherein, the feature of the present invention lies in following characteristic parts: said shower head shell has a round recess socket inwardly created into the reverse side to be having the detachable alerting pod embedded therein, and a terminal latching nick created in the distal internal wall of the recess socket while a snap latching jut created in the proximal internal wall of the recess socket; said alerting pod, which is a plastic capsule made by a plastic transparent lid and a plastic mounting cavity via high frequency fusion method into a hermetically watertight integral body to accommodate the signal circuit device therein, has a terminal latching jut created on the heading rim thereof while a snap latching nick created on the rear rim thereof, two passive recharging electrodes firmly inset internal bottom wall of the mounting cavity with each one individual end of the two passive recharging electrodes protruding out of the mounting cavity; and said signal circuit device includes a microprocessor, a LCD display circuit electrically connected to the microprocessor with its location near the transparent lid, a rechargeable battery electrically connected to the microprocessor, and a magnetic reed switch securely inset on the internal bottom side of the mounting cavity such that the rechargeable battery is connected with the passive recharging electrode of the alerting pod via a pair of wires.