Waterproof case for an electronic device

Abstract

The present invention relates to a protective case, in particular a waterproof case for electronic device. The waterproof case comprises a front cover, a back cover, a first sealing plug and a second sealing plug, wherein the front cover is provided with a transparent sheet, a frame and a bottom wrap, and the back cover at least has an open end and a blind end. The good sealing and waterproof performance for the case can be achieved by the close fit between the waterproof strip and groove disposed at both sides' edges of the back cover and the front cover, and the outer locking shell. Moreover, the back cover, the front cover and the outer locking shell can be made of inexpensive material that makes the present invention easy to be manufactured.

What is claimed is: 
     
         1 . A protective case for an electronic device, comprising:
 a front cover, comprising:
 a transparent sheet at least covering and clinging to the screen of the electronic device, whereby the screen of the said electronic device can be used or inputted through the transparent sheet; 
 a frame disposed around the transparent sheet to enclose the edges of the electronic device, and a waterproof groove/strip is provided in the edges of the frame; and 
 a bottom wrap wrapped the edge of the lower part of the frame, wherein the bottom wrap further comprises a first opening corresponding to the charger port of the electronic device and a control button corresponding to the key of the electronic device; 
   a back cover at least covering the back side and the upper part of the electronic device, and encasing the electronic device along with the front cover, comprising:
 at least an open end and a blind end, wherein a waterproof strip/groove is set up on the interior walls of at least two sides' edges of the back cover, when the front cover is inserted into the back cover, both sides' edges of the frame of the front cover can be slid into the interior walls of two sides' edges of the back cover from the open end, and then the front cover is pushed forward until the bottom wrap of the front cover engages with the open end of the back cover, while the waterproof groove/strip of the front cover engages with the waterproof strip/groove of the back cover completely so as to perform a waterproof function; and 
 a second opening corresponding to the headphone jack of the electronic device; 
   a first sealing plug for plugging the first opening, and   a second sealing plug for plugging the second opening.   
     
     
         2 . The protective case for an electronic device of  claim 1 , wherein a waterproof groove is provided in surrounding edges of the frame, and the waterproof strip corresponding to the waterproof groove is disposed in the interior walls of the two sides' edges of the back cover and the interior wall of the blind end of the back cover. 
     
     
         3 . The protective case for an electronic device of  claim 1 , wherein a waterproof strip is provided in surrounding edges of the frame, and the a waterproof groove corresponding to the waterproof strip is disposed in the interior walls of the two sides' edges of the back cover and the interior wall of the blind end of the back cover. 
     
     
         4 . The protective case for an electronic device of  claim 1 , further comprising an outer locking shell, wherein the outer locking shell encases the assembly formed by the front cover and the back cover, and makes the two covers tight enough in order to achieve better waterproof performance. 
     
     
         5 . The protective case for an electronic device of  claim 4 , wherein the outer locking shell further comprises two lateral sides, each of which has a positioning slot for fixing the outer locking shell and the back cover; While a positioning bulge is disposed on each outer side wall of the back cover, when fixing the outer locking shell to the back cover, the positioning bulge will be inserted into the positioning slot of the outer locking shell for tight connection between the outer locking shell and the back cover. 
     
     
         6 . The protective case for an electronic device of  claim 5 , wherein the said positioning slot of the said outer locking shell is a long narrow track; and the said positioning bulge of the said back cover is also long narrow-shaped. 
     
     
         7 . The protective case for an electronic device of  claim 4 , wherein the said outer locking shell further comprises two lateral sides, each of which has a positioning bulge for holding in place the said outer locking shell and the said back cover; while a positioning slot is disposed on each outer side wall of the said back cover, when placing the said outer locking shell to the said back cover, the said positioning bulge will be inserted into the said positioning slot for tight connection between the said outer locking shell and the said back cover. 
     
     
         8 . The protective case for an electronic device of  claim 7 , wherein the said positioning bulge of the said outer locking shell is a long narrow bulge, and the said positioning slot of the said back cover is also long narrow slot. 
     
     
         9 . The protective case for electronic device of  claim 4 , wherein the said outer locking shell has an opening corresponding to the charger port or headphone jack of the said electronic device. 
     
     
         10 . The waterproof case for electronic device of  claim 1 , wherein the open end of the said back cover is provided with multi-step grooves, and the said bottom wrap of the said front cover is also provided with multi-step raised platforms corresponding to the multi-step grooves, such that the said multi-step grooves can be joined to the said multi-step raised platforms hermetically and the said protective case can be sealed when in use. 
     
     
         11 . The protective case for electronic device of  claim 1 , wherein the first sealing plug is of L shape which is consisted of a horizontal plane member and a vertical member, wherein a locking bulge is disposed on the inner wall of the horizontal plane member to snap the back side of the said bottom wrap, and the vertical member is of arc-shape corresponding to the curve side of the said bottom wrap, wherein an one-piece gasket is disposed on the inner wall of the vertical member to plug the said first opening. 
     
     
         12 . The protective case for electronic device of  claim 11 , wherein the said skid-proof strips can be disposed on the outer side of the vertical member in order to operate the L-shaped plug conveniently. 
     
     
         13 . The protective case for electronic device of  claim 1 , wherein a square slot is provided around the said first opening; and the said first opening is within the square slot, wherein the said first sealing plug is embedded in the square slot and can be slid within the slot to seal the said first opening. 
     
     
         14 . The protective case for electronic device of  claim 13 , wherein the said skid-proof strips are provided on the outer surface of the plug in order to make the said plug to slide easily. 
     
     
         15 . The protective case for electronic device of  claim 1 , wherein the second sealing plug is a screw plug made of plastic or rubber. 
     
     
         16 . The protective case for electronic device of  claim 1 , wherein a transparent lens plastic sheet is provided on the said back cover, corresponding to the camera of the said electronic device, and the said transparent lens plastic sheet is a post-forming part in the said back cover. 
     
     
         17 . The protective case for electronic device of  claim 1 , wherein a waterproof fabric is also provided on the said back cover, corresponding to the speaker of the said electronic device. 
     
     
         18 . The protective case for electronic device of  claim 1 , wherein a transparent plastic sheet is provided on the said outer locking shell, corresponding to the camera and speaker of the said electronic device, and the said transparent plastic sheet is a post-forming part in the said outer locking shell. 
     
     
         19 . The protective case for electronic device of  claim 1 , wherein the frame of the said front cover is made of soft material or hard material. 
     
     
         20 . The waterproof case for electronic device of  claim 1 , wherein the said back cover is made of soft material or hard material. 
     
     
         21 . A waterproof case for electronic device, comprising:
 a front cover, comprising:
 a transparent sheet at least covering and clinging to the screen of the electronic device, whereby the screen of the said electronic device can be used or inputted through the transparent sheet; 
 a frame disposed around the transparent sheet to enclose the edges of the electronic device, and a waterproof groove/strip is provided in the edges of the frame; and 
   a protective back cover shell, covering the entire back of the electronic device, and encasing the electronic device around the edges of the front sheet cover, comprising:
 an inner back cover, covering the entire back of the electronic device; wherein a waterproof tongues are set up on the interior walls of along the edges of the inner back cover, wherein the front sheet cover is inserted into the back cover after having attached the electronic device onto the front sheet cover, while the waterproof grooves of the front sheet cover completely engages with the waterproof tongues of the back cover to perform the waterproof function. 
 an outer locking shell, which is made with hard material, providing sealing pressures around the sides of the inner back cover to assure the waterproof functionality of the complete assembly of the waterproof protective cover. The outer locking shell should be thick enough to be able to provide good pressures to perform good waterproof functionality of the complete protective case. 
   a first sealing plug for plugging the first opening, and   a second sealing plug for plugging the second opening.   
     
     
         22 . The protective case for electronic device of  claim 21 , wherein the said protective case having an outer locking shell and the said outer locking shell encases the assembly formed by the said front sheet cover and the said back shell cover, and makes the said two covers tight enough in order to achieve better waterproof performance. 
     
     
         23 . The protective case for electronic device of  claim 21 , wherein the said outer locking shell having one or more openings corresponding to the charger port or headphone jack of the electronic device. 
     
     
         24 . The protective case for electronic device of  claim 21 , wherein the said protective case having a sealing plug that is made of waterproof plastic or rubber stopper. 
     
     
         25 . The protective case for electronic device of  claim 21 , wherein the said protective case having a waterproof fabric on the opening of the said back cover, corresponding to the speaker of the said electronic device. 
     
     
         26 . The protective case for electronic device of  claim 21 , wherein the said protective case having a transparent plastic lens on the said outer locking shell, corresponding to the camera and speaker of the said electronic device, and the transparent plastic lens is a post-forming part in the said outer locking shell. 
     
     
         27 . The protective case for electronic device of  claim 21 , wherein the said frame of the said front cover is made of soft material or hard material. 
     
     
         28 . The protective case for electronic device of  claim 21 , wherein the said back cover is made of soft material or hard material.