Patent Publication Number: US-2013247470-A1

Title: Seal mechanism of high pressure coffee machine

Description:
FIELD OF THE INVENTION 
     The present invention relates to a seal mechanism of high pressure coffee machine. 
     BACKGROUND OF THE INVENTION 
     The high pressure coffee machine at the prior art can be used for extracting and making coffee bag and coffee capsule, and its seal mechanism comprises the lower body and the upper cover, and the lower body and the upper cover are pivotally connected together. A coffee box with upward opening is arranged above the lower body, and a sealing piece is arranged below the upper cover, and the sealing piece and the coffee box opening are coupling with each other. And a hook mechanism is arranged between the lower body and the upper cover. Because only a hook mechanism is arranged between the upper cover and the lower body, the sealing force between the sealing piece and the coffee box is bear by the hook mechanism, the sealing performance is not good, and the sealing performance can be damaged by the shake during the high pressure extraction process. 
     SUMMARY OF THE INVENTION 
     The object of the present invention is to offer a seal mechanism of high pressure coffee machine which overcomes the defect at the prior art. 
     The technical proposal solving the technical matter in the present invention is: 
     A seal mechanism of high pressure coffee machine, comprises an upper cover ( 100 ), a rotary cover ( 200 ) and a lower body ( 300 ), the back end of the upper cover ( 100 ), the back end of the rotary cover ( 200 ) and the back of the lower body ( 300 ) are pivotally connected together, a coffee box ( 310 ) with upward opening is arranged on the lower body ( 300 ), and a sealing piece ( 210 ) that can adaptively cover the opening of the coffee box ( 310 ) is arranged under the rotary cover ( 200 ); 
     The hook mechanism is arranged between the upper cover ( 100 ) and the lower body ( 300 ); 
     The closing mechanism is arranged between the upper cover ( 100 ) and the rotary cover ( 200 ), which comprises the handle ( 120 ), the closing piece ( 130 ) and the opening and closing rod ( 140 ); the handle ( 120 ) is moveably connected to the upper cover ( 100 ), the closing piece ( 130 ) and the handle ( 120 ) form an interlock connection relationship and are against above the rotary cover ( 200 ), and the opening and closing rod ( 140 ) and the handle ( 120 ) form a interlock connection relationship to adaptive to the hook mechanism. 
     In a preferred embodiment, the closing piece ( 130 ) is a cam, and the cam and the handle ( 120 ) form a synchronous coaxial rotation connection relationship, and the peripheral surface of the cam is against the rotary cover ( 200 ). 
     In a preferred embodiment, the opening and closing rod ( 140 ) and the handle ( 120 ) form a synchronous coaxial rotation connection relationship. 
     In a preferred embodiment, the hook mechanism comprises the hook ( 110 ) and the neck ( 320 ), the hook ( 110 ) is pivotally connected to the upper cover ( 100 ) and is adaptive to the opening and closing rod ( 140 ), and the neck ( 320 ) is arranged at the side of the lower body ( 300 ). 
     In a preferred embodiment, an opening and closing torsional spring ( 170 ) is arranged between the opening and closing rod ( 140 ) and the upper cover ( 100 ). 
     In a preferred embodiment, the necks ( 320 ) are arranged at the two sides of the lower body ( 300 ); the hooks ( 110 ) are pivotally connected to the two sides of the upper cover ( 100 ). 
     In a preferred embodiment, the handle ( 120 ) is pivotally connected to the upper cover ( 100 ), and the pivot of the handle ( 120 ) is on the first plane that is vertical to the sealing piece ( 210 ) and penetrates the centre of the circle of the sealing piece ( 210 ). 
     In a preferred embodiment, the front end of the upper cover ( 100 ) extends downward to form a fixing part ( 150 ), and the lower end of the fixing part ( 150 ) extends forward to form a locating part ( 160 ); the front end of the rotary cover ( 200 ) is arranged between the upper cover ( 100 ) and the locating part ( 160 ), and the thickness of the front end of the rotary cover ( 200 ) is small than the distance between the upper cover ( 100 ) and the locating part ( 160 ), and a pressure spring ( 220 ) is arranged between the rotary cover ( 200 ) and the locating part ( 160 ). 
     In a preferred embodiment, a flicking torsional spring ( 500 ) is arranged between the lower body ( 300 ) and the rotary cover ( 200 ). 
     Compared with the technical proposal at the prior, the benefits of the present invention are: 
     1 The hook mechanism and the closing mechanism are arranged among the lower body, the rotary cover and the upper cover, so that the sealing force between the coffee box and the sealing piece is large, and the sealing performance is good, the operation is labor-saving, convenient and simple; 
     2 The pivot of the handle is on the first plane that is vertical to the sealing piece and penetrates the centre of the circle of the sealing piece, so that the handle is vertical to the rotary cover after the handle is pressed down, namely is provide with the same direction as the pressure generated from the coffee bag or the café capsule during the extraction process, and then the rotary cover is clamped, which will not flick during the extraction process, guaranteeing the sealing effects. 
     3 The cam and the handle form a synchronous coaxial rotation connection relationship, the cam is coupling with the rotary cover, so that the structure is simple; 
     4 The opening and closing rod ( 140 ) and the handle ( 120 ) form a synchronous coaxial rotation connection relationship, the structure is simple. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       With the following description of the drawings and specific embodiments, the invention shall be further described in details. 
         FIG. 1  shows the solid exploded view of the seal mechanism of high pressure coffee machine; 
         FIG. 2  shows the front exploded view of the seal mechanism of high pressure coffee machine; 
         FIG. 3  shows the plan view of the seal mechanism of high pressure coffee machine; 
         FIG. 4  shows the front view of the seal mechanism of high pressure coffee machine, the seal mechanism is opened at this moment; 
         FIG. 5  shows the front view of the seal mechanism of high pressure coffee machine, the hook is clamped to the neck; 
         FIG. 6  shows the sectional view of  FIG. 3  B-B, the close state is present; 
         FIG. 7  shows the sectional view of  FIG. 3  A-A, the close state is present; 
         FIG. 8  shows the sectional view of  FIG. 3  C-C, the close state is present; 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     According to  FIG. 1  to  FIG. 8 , a seal mechanism of high pressure coffee machine, it comprises an upper cover  100 , a rotary cover  200  and a lower body  300 , the back end of the upper cover  100 , the back end of the rotary cover  200  and the back of the lower body  300  are pivotally connected together through the back pivot  400 , and a flicking torsional spring  500  is arranged between the lower body  300  and the rotary cover  200 . 
     A coffee box  310  with upward opening is opened at the front middle part of the lower body  300 , and an extraction strainer  330  is arranged in the coffee box  310 . 
     In the present embodiment, a groove is concavely arranged on the bottom surface of the front middle part of the rotary cover  200 , and a fixator  230  is inlaid at the groove, and a sealing piece  210  that can adaptively cover the opening of the coffee box  310  is arranged on the bottom surface of the fixator  230 . 
     The front end of the upper cover  100  extends downward to form a fixing part  150 , and the lower end of the fixing part  150  extends forward to form a locating part  160 ; the front end of the rotary cover  200  is arranged between the upper cover  100  and the locating part  160 , and the thickness of the front end of the rotary cover  200  is small than the distance between the upper cover  100  and the locating part  160 , so that the front end of the rotary cover  200  can be rotated relative to the upper cover  100 , and a pressure spring  220  is arranged between the rotary cover  200  and the locating part  160 . 
     Two hook mechanisms are arranged between the upper cover  100  and the lower body  300 . The hook mechanism comprises a hook  110  and a neck  320 , the two necks  320  are arranged to the two sides of the lower body  300 , and the two hooks  110  are pivotally connected to the two sides of the upper cover  100  through the hook shaft  190  and are located through the clamping piece  191 . 
     A closing mechanism is arranged between the upper cover  100  and the rotary cover  200 , which comprises a handle  120 , a closing piece  130  and two opening and closing rods  140 . 
     The handle  120  is pivotally connected on the front end of the upper cover  100 . The closing piece  130  is a cam, and the cam and the handle  120  form a synchronous coaxial rotation connection relationship, and the peripheral surface of the cam is against the rotary cover  200 , and correspondingly located above the fixator  230 . As a consequence, when the handle  120  rotates relatively to the upper cover  100 , it can drive the rotation of the cam, and can be against the rotary cover  200  to rotate downward, so that the sealing piece  210  is closing on the coffee box  10 , or, the rotary cover  200  can be against by the pressure spring  200  to rotate upward, so that the closing between the sealing piece  210  and the coffee box  310  can be loosen. Preferably, the pivot of the handle  120  is on the first plane that is vertical to the sealing piece  210  and penetrates the centre of the circle of the sealing piece  210 . 
     The two opening and closing rods  140  are connected to the two sides of the handle  120  respectively, and the opening and closing rod  140  and the handle  120  form a synchronous coaxial rotation connection relationship. The two opening and closing rods  140  are coupling with the two hooks  110  respectively, namely can be against the hooks  110  respectively to make the hooks reversal, and then the hook structure between the hook  110  and the neck  320  is loosen, and namely the opening and closing rod  140  and the handle  120  form a interlock connection relationship to adaptive to the hook mechanism. Preferably, an opening and closing torsional spring  170  is arranged between the opening and closing rod  140  and the upper cover  100 . 
     In the present embodiment, the cam is fixedly connected to the handle, and the handle is fixedly connected to the handle shaft  180  and is pivotally connected to the upper cover through the handle shaft  180 , and the opening and closing rod can be rotationally sleeved to the handle shaft  180  coaxially and synchronously. 
     For the examiner to better understand the present embodiment, the closing procedure of the seal mechanism is described below: 
     1 The downward pressure is exerted to the upper cover  100 , and the elastic force of the flicking torsional spring  500  is overcome, and the upper cover  100  is rotated downward, and then the hook  110  is fixedly connected on the neck  320 , the sealing piece  210  is located above the coffee box  310  at this moment, but the sealing piece  210  does not contacts the coffee box  310 , so the tight handfeel from the compression is not generated, according to  FIG. 5 ; 
     2 The handle  120  is pressed down, and the rotary cover  200  is pressed down by the cam  130 , and the elastic force of the pressure spring  220  is overcome, and the rotary cover  200  is rotated down ward, so that the complete seal of the sealing piece and the coffee box is achieved, according to  FIGS. 6 ,  7  and  8 . 
     For the examiner to better understand the present embodiment, the opening procedure of the seal mechanism is described below: 
     1 The handle  120  is pulled up when opening, and the cam of the handle  120  will first release the rotary cover, and the compression of the sealing piece is released under the action of the pressure spring, and then the frictional force to the hooks and the lower body from the compression is decreased; 
     2 Then the handle  120  is pulled up again, the opening and closing rod fixedly connected to the two sides of the handle  120  will push the hooks down, so that the hooks quit from the lower body, then the opening action is achieved. 
     The invention has been described with reference to the preferred embodiments mentioned above; therefore it cannot limit the reference implementation of the invention. It is obvious to a person skilled in the art that structural modification and changes can be carried out without leaving the scope of the claims hereinafter and the description above. 
     INDUSTRIAL APPLICABILITY 
     The seal mechanism of high pressure coffee machine in the present embodiment, a hook mechanism and a closing mechanism are arranged among the lower body, the rotary cover and the upper cover, so that the sealing force between the coffee box and the sealing piece is large, the sealing performance is good, the operation is labor-saving, convenient and simple, so the present invention is provided with good industrial applicability.