Cassette for storing sheet media

Abstract

A cassette for storing sheet media includes a box body with an opening, wherein the cassette further includes a pressing plate located in the box body, and a self-driven mechanism for driving the pressing plate to move towards the opening; the self-driven mechanism includes a support frame connected with the pressing plate, a driving shaft arranged on the support frame and driven by an elastic energy storage element, travelling gears synchronously moving on the two sides of the support frame, and guide racks matched with the travelling gears and extending along a stacking direction of the sheet media; and the travelling gears are driven by the driving shaft.

What is claimed is: 
     
         1 . A cassette for storing sheet media, comprising a box body ( 1 ) with an opening (A), wherein the cassette further comprises a pressing plate ( 5 ) located in the box body ( 1 ), and a self-driven mechanism ( 6 ) for driving the pressing plate ( 5 ) to move towards the opening (A); the self-driven mechanism ( 6 ) comprises a support frame ( 4 ) connected with the pressing plate ( 5 ), a driving shaft ( 61 ) arranged on the support frame ( 4 ) and driven by an elastic energy storage element ( 62 ), travelling gears ( 63 ) synchronously moving on the two sides of the support frame ( 4 ), and guide racks ( 64 ) matched with the travelling gears ( 63 ) and extending along a stacking direction of the sheet media; and the travelling gears ( 63 ) are driven by the driving shaft ( 61 ). 
     
     
         2 . The cassette for storing the sheet media according to  claim 1 , wherein the travelling gears ( 63 ) on each side of the support frame ( 4 ) comprise a first gear ( 631 ) and a second gear ( 632 ), which are engaged with each other, and the guide racks ( 64 ) comprise a first rack ( 641 ) and a second rack ( 642 ), which are located on the each side of the support frame ( 4 ) and arranged in parallel at an interval; and the first gear ( 631 ) is engaged with the first rack ( 641 ), and the second gear ( 632 ) is engaged with the second rack ( 642 ). 
     
     
         3 . The cassette for storing the sheet media according to  claim 1 , wherein the pressing plate ( 5 ) is pivoted to the support frame ( 4 ) through a pivoting shaft ( 51 ) in a winging way, and an axis of the pivoting shaft ( 51 ) extends along a height direction of the box body ( 1 ). 
     
     
         4 . The cassette for storing sheet media according to  claim 1 , wherein an axis of the driving shaft ( 61 ) is perpendicular to the stacking direction of the sheet media. 
     
     
         5 . The cassette for storing the sheet media according to  claim 1 , wherein the cassette comprises the box body ( 1 ) being cuboidal, and a box door ( 2 ) movably connected with the box body ( 1 ), wherein the opening (A) extends in two adjacent sidewalls of the box body ( 1 ); and the box door ( 2 ) has a folded state of being folded into the box body ( 1 ) to open the opening (A). 
     
     
         6 . The cassette for storing the sheet media according to  claim 1 , wherein the box body ( 1 ) comprises a main body ( 17 ), and an upper cover ( 18 ) hinged to the main body ( 17 ); the opening (A) is formed in the upper cover ( 18 ), and is close to a side at which a hinging position of the upper cover ( 18 ) is; and a safety lock ( 9 ) is arranged between the upper cover ( 18 ) and the main body ( 17 ). 
     
     
         7 . The cassette for storing sheet media according to  claim 1 , wherein the box body ( 1 ) comprises a main body ( 17 ), and an upper cover ( 18 ) hinged to the main body ( 17 ), the pressing plate ( 5 ) and the self-driven mechanism ( 6 ) are located in the main body ( 17 ), and a pressing plate backstop mechanism ( 8 ) is arranged between the support frame ( 4 ) of the self-driven mechanism ( 6 ) and the upper cover ( 18 ). 
     
     
         8 . The cassette for storing sheet media according to  claim 7 , wherein the pressing plate backstop mechanism ( 8 ) comprises a pawl ( 81 ) arranged on the support frame ( 4 ), and a plurality of bayonets ( 181 ) formed in the upper cover ( 18 ) and matched with the pawl ( 81 ) to limit the pawl ( 81 ) to move in a direction away from the opening (A) in a clamping way; and the plurality of bayonets ( 181 ) are formed at intervals along the stacking direction of the sheet media. 
     
     
         9 . The cassette for storing the sheet media according to  claim 1 , wherein the support frame ( 4 ) comprises a first sidewall ( 41 ) and a second sidewall ( 42 ) which are arranged in parallel at an interval, and a top wall ( 44 ) and a bottom wall ( 45 ) which extend between the first sidewall ( 41 ) and the second sidewall ( 42 ); and the driving shaft ( 61 ) is supported on the first sidewall ( 41 ) and the second sidewall ( 42 ), and is located between the top wall ( 44 ) and the bottom wall ( 45 ). 
     
     
         10 . The cassette for storing the sheet media according to  claim 9 , wherein two operating recesses ( 43 ) symmetric about a width centre of the support frame ( 4 ) are formed in a side, close to the opening (A), of the support frame ( 4 ).