PAPER FEEDING TRAY

Abstract

A paper feeding tray includes a base body, two through holes, two paper guiding elements pivotally disposed in the two through holes, and two elastic elements. The two through holes penetrate through the base body along an up-down direction. An inner portion of a shaft hole of a front inner wall of each through hole extends inward and then expands transversely to form an eccentric hole. Two sides of an inner portion of a shaft which is protruded from a front surface of each paper guiding element transversely extend oppositely to form an eccentric element. The two eccentric elements of the two paper guiding elements are rotatably accommodated in the two eccentric holes of the two through holes. The two elastic elements abut against the two eccentric elements.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

The present application is based on, and claims priority from, China Patent Application No. 202322737298.1, filed Oct. 12, 2023, the disclosure of which is hereby incorporated by reference herein in its entirety.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention generally relates to a paper feeding tray, and more particularly to a paper feeding tray which avoids a long and narrow paper skewing from side to side or tilting upward in a feeding process.

Description of Related Art

Referring to FIG. 12 and FIG. 13, in order to facilitate a scanning of a large number of papers by a user, a conventional automatic scanner has an input tray 100′ for accommodating the papers which are to be scanned, and an output tray for loading the scanned papers. In the meantime, in order to allow the input tray 100′ to feed papers 300′ with various different widths, the input tray 100′ is usually equipped with two slidable lateral clamping boards 42′. The two lateral clamping boards 42′ are slidably located at two sides of a top surface of one end of the input tray 100′, and the two lateral clamping boards 42′ are movable along a sliding rail 41′ for adjusting a distance between the two lateral clamping boards 42′ according to the width of the paper 300′ which is to be scanned.

However, when the long and narrow paper 300′ is in a feeding process, even though a front end of the paper 300′ is fastened by the two lateral clamping boards 42′, a rear end of the paper 300′ tends to skew from side to side or tilt upward, so quality of a scanned image of the paper 300′ tends to be poor.

Therefore, it is necessary to provide a paper feeding tray which avoids a long and narrow paper skewing from side to side or tilting upward in a feeding process.

BRIEF SUMMARY OF THE INVENTION

An object of the present invention is to provide a paper feeding tray which avoids a long and narrow paper skewing from side to side or tilting upward in a feeding process. The paper feeding tray includes a base body disposed for loading papers which are to be fed, two through holes, two paper guiding elements and two elastic elements. The base body includes an upper body, and a lower body mounted under the upper body. The two through holes penetrate through a top surface and a bottom surface of the base body along an up-down direction. The two through holes are symmetrical with respect to a middle of the base body. A front surface of a middle of a front inner wall and a front surface of a middle of a rear inner wall of each through hole are recessed rearward to form two shaft holes penetrating through a bottom surface of the upper body. An inner portion of the shaft hole of the front inner wall of each through hole extends inward and then expands transversely to form an eccentric hole. The two paper guiding elements are pivotally disposed in the two through holes. The two paper guiding elements are mounted between the upper body and the lower body. A middle of a front surface and a middle of a rear surface of each paper guiding element protrude oppositely to form two shafts along a longitudinal direction. The front surface and the rear surface of each paper guiding element are longer than two outer surfaces of each paper guiding element. Two sides of an inner portion of the shaft which is protruded from the front surface of each paper guiding element transversely extend oppositely to form an eccentric element. The eccentric element and the shaft which is protruded from the front surface of each paper guiding element are coaxial. The two shafts are accommodated in the two shaft holes to fasten the two paper guiding elements in the two through holes, and the two paper guiding elements rotate around the two shafts. The two eccentric elements of the two paper guiding elements are rotatably accommodated in the two eccentric holes of the two through holes, so the two paper guiding elements are rotatably disposed in the two through holes. A middle of each elastic element is disposed under one eccentric hole. Each elastic element is connected with an opening end of the one eccentric hole, and each elastic element seals the one eccentric hole. The two eccentric elements of the two paper guiding elements are fastened in the two eccentric holes of the two through holes by the two elastic elements. Two middles of the two elastic elements abut against the two eccentric elements.

Another object of the present invention is to provide a paper feeding tray. The paper feeding tray includes a base body, two sides of the base body having two through holes penetrating through a top surface and a bottom surface of the base body along an up-down direction, a front inner wall and a rear inner wall of each through hole being recessed to form two shaft holes, an inner portion of at least one of the two shaft holes extending inward and then expanding transversely to form an eccentric hole; two paper guiding elements pivotally disposed in the two through holes, the two paper guiding elements being mounted in the base body, a front surface and a rear surface of each paper guiding element protruding oppositely to form two shafts, a peripheral portion of at least one of the two shafts extending to form an eccentric element, the two shafts being accommodated in the two shaft holes, and the two paper guiding elements rotating around the two shafts, the two eccentric elements of the two paper guiding elements being rotatably accommodated in the two eccentric holes of the two through holes; and two elastic elements, a middle of each elastic element being disposed under one eccentric hole, each elastic element being connected with an opening end of the one eccentric hole, and each elastic element scaling the one eccentric hole, two middles of the two elastic elements abutting against the two eccentric elements, a top surface and a bottom surface of the eccentric element being wider than two side surfaces of the eccentric element, and the two side surfaces of the eccentric element being convex, so each paper guiding element being driven by one elastic element to return to an original position.

Another object of the present invention is to provide a paper feeding tray. The paper feeding tray includes a base body disposed for loading papers which are to be fed, the base body having an upper body, and a lower body mounted under the upper body, two sides of the base body having two through holes penetrating through a top surface and a bottom surface of the base body along an up-down direction, a front surface of a middle of a front inner wall and a front surface of a middle of a rear inner wall of each through hole being recessed rearward to form two shaft holes penetrating through a bottom surface of the upper body, an inner portion of the shaft hole of the front inner wall of each through hole extending inward and then expanding transversely to form an eccentric hole; two paper guiding elements pivotally disposed in the two through holes for guiding the papers, the two paper guiding elements being mounted between the upper body and the lower body, a middle of a front surface and a middle of a rear surface of each paper guiding element protruding oppositely to form two shafts along a longitudinal direction, the front surface and the rear surface of each paper guiding element being longer than two outer surfaces of each paper guiding element, two sides of an inner portion of the shaft which is protruded from the front surface of each paper guiding element transversely extending oppositely to form an eccentric element, the two shafts being accommodated in the two shaft holes, and the two paper guiding elements rotating around the two shafts, the two eccentric elements of the two paper guiding elements being rotatably accommodated in the two eccentric holes of the two through holes; two elastic elements for elastically limiting the two paper guiding elements to press the papers, a middle of each elastic element being disposed under one eccentric hole, each elastic element being connected with an opening end of the one eccentric hole, and each elastic element sealing the one eccentric hole, two middles of the two elastic elements abutting against the two eccentric elements, a top surface and a bottom surface of the eccentric element being wider than two side surfaces of the eccentric element, and the two side surfaces of the eccentric element being convex, so each paper guiding element being driven by one elastic element to return to an original position by rotating a smaller angle; and a folding tray for receiving the papers, the base body being pivotally connected to the folding tray, the folding tray and the base body being foldable, the folding tray including an upper tray, a lower tray disposed under the upper tray, and two slidable paper blocking elements, the upper tray having two sliding rails, each sliding rail having two sliding boards which are separated from each other to form a sliding groove between the two sliding boards, an interval being formed between a lower surface of the upper tray and an upper surface of the lower tray, the two paper blocking elements being slidably disposed on the two sliding rails, each paper blocking element including a base frame, and a lateral clamping board mounted to an outer side of the base frame, the lateral clamping board being folded to the base frame, or the lateral clamping board being unfolded from the base frame, a middle of a bottom surface of the base frame being connected with a sliding block protruded downward, when the two paper blocking elements transversely slide, the two sliding blocks of the two paper blocking elements sliding in the two sliding grooves of the two sliding rails, and the two sliding blocks projecting into the interval.

As described above, the two sides of the base body of the paper feeding tray have the two rectangular through holes penetrating through the top surface and the bottom surface of the base body along the up-down direction, the two paper guiding elements are pivotally disposed in the two through holes, each paper guiding element has the two shafts and the eccentric element, the two sides of the inner portion of the shaft which is protruded from the front surface of each paper guiding element transversely extend oppositely to form the eccentric element which is a rectangular board shape, the two eccentric elements of the two paper guiding elements are accommodated in the two eccentric holes of the two through holes, the two middles of the two elastic elements abut against the two eccentric elements, when the two eccentric elements rotate, the two elastic elements are stretched, so two resilient forces are provided for the two paper guiding elements by the two elastic elements, the paper is pushed by the two paper guiding elements to a center of the base body of the paper feeding tray and close to the top surface of the base body by the two resilient forces, so that a tilt of the paper which is to be fed is prevented. As a result, the paper feeding tray avoids a long and narrow paper skewing from side to side or tilting upward in the feeding process.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be apparent to those skilled in the art by reading the following description, with reference to the attached drawings, in which:

FIG. 1 is a perspective view of a paper feeding tray in accordance with a preferred embodiment of the present invention;

FIG. 2 is another perspective view of the paper feeding tray in accordance with the preferred embodiment of the present invention;

FIG. 3 is a schematic diagram that shows a paper feeding operation of the paper feeding tray according to the preferred embodiment of the present invention;

FIG. 4 is a side view of the paper feeding tray, wherein the paper feeding tray is in a folded state according to the preferred embodiment of the present invention;

FIG. 5 is a perspective view of a paper guiding element of the paper feeding tray according to the preferred embodiment of the present invention;

FIG. 6 is a partially exploded view of the paper feeding tray according to the preferred embodiment of the present invention;

FIG. 7 is an enlarged view of an encircled portion VII of the paper feeding tray of FIG. 6;

FIG. 8 is a partially enlarged cross-sectional diagram of the paper feeding tray according to the preferred embodiment of the present invention;

FIG. 9 is another partially enlarged cross-sectional diagram of the paper feeding tray according to the preferred embodiment of the present invention;

FIG. 10 is a cross-sectional view of the paper guiding element of the paper feeding tray in accordance with the preferred embodiment of the present invention;

FIG. 11 is a partial assembling view of the paper feeding tray in accordance with the preferred embodiment of the present invention;

FIG. 12 is a schematic diagram of an input tray in prior art, wherein a paper tilt is caused by the input tray; and

FIG. 13 is a schematic diagram of the input tray in the prior art, wherein a paper skew is caused by the input tray.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIG. 1, a paper feeding tray 100 in accordance with a preferred embodiment of the present invention is shown. The paper feeding tray 100 includes a base body 10, two paper guiding elements 20, two elastic elements 30 and a folding tray 40.

Referring to FIG. 1 to FIG. 4, the folding tray 40 is pivotally connected to a main body 50 of a scanner (not labeled), and the folding tray 40 is combined with the main body 50. The base body 10 is disposed for loading papers 300 which are to be fed. The folding tray 40 is used for receiving the papers 300. The base body 10 is pivotally connected to the folding tray 40, and the base body 10 is combined with the folding tray 40, so the base body 10 and the folding tray 40 together load the papers 300 which are to be scanned, and the base body 10 and the folding tray 40 together accommodate the papers 300 which are to be fed. The folding tray 40 and the base body 10 are foldable. When the scanner is unused, the folding tray 40 and the base body 10 are folded to the main body 50 to reduce an occupied space.

Referring to FIG. 1, FIG. 2, FIG. 3 and FIG. 11, the folding tray 40 includes an upper tray 401, a lower tray 408 disposed under the upper tray 401, and two slidable paper blocking elements 42. The upper tray 401 of the folding tray 40 has two sliding rails 41. The lower tray 408 includes a rectangular bottom wall 406, and two lateral walls 407 protruded upward from two opposite sides of the bottom wall 406. The two sliding rails 41 are arranged in two sides of a top of the folding tray 40, and the two sliding rails 41 are symmetrical with respect to a middle of the folding tray 40. The two sliding rails 41 are formed at two sides of the upper tray 401, and the two sliding rails 41 are symmetrical with respect to a middle of the upper tray 401.

Each sliding rail 41 has two sliding boards 402 extending transversely. The two sliding boards 402 are located at a front and a rear of the sliding rail 41. The sliding boards 402 of one sliding rail 41 extend between one side of the middle of the upper tray 401, and one lateral wall 407. The sliding boards 402 of the other sliding rail 41 extend between the other side of the middle of the upper tray 401, and the other lateral wall 407. The two sliding boards 402 are separated from each other to form a sliding groove 403 between the two sliding boards 402. Two lower portions of two outer sides of the two sliding boards 402 extend outward to form two guiding straps 404. A periphery of a bottom surface of the upper tray 401 protrudes downward to form a propping portion 405. An outer side of one sliding board 402 protrudes downward to form a supporting rib 409, and two sides of the other sliding board 402 protrude downward to form two supporting ribs 409. The upper tray 401 is mounted on the lower tray 408. The two sliding rails 41 are mounted on the bottom wall 406 of the lower tray 408. The propping portion 405 and the supporting ribs 409 of the upper tray 401 are mounted on a top surface of the bottom wall 406 of the lower tray 408 to form an interval 411. The interval 411 is formed between a lower surface of the upper tray 401 and an upper surface of the lower tray 408.

The two slidable paper blocking elements 42 are slidably disposed on the two sliding rails 41. The two paper blocking elements 42 transversely slide along the two sliding rails 41 for adjusting a distance between the two paper blocking elements 42 according to a width of the paper 300. Each paper blocking element 42 includes a base frame 421, and a lateral clamping board 422 mounted to an outer side of the base frame 421. The lateral clamping board 422 is folded to the base frame 421, or the lateral clamping board 422 is unfolded from the base frame 421. A middle of a bottom surface of the base frame 421 is connected with a sliding block 423 protruded downward. Two sides of a front and two sides of a rear of the sliding block 423 are arched outward to form a plurality of arching portions 425. In the preferred embodiment, each paper blocking element 42 has four arching portions 425. Two sides of the bottom surface of the base frame 421 protrude downward and then extend inward to form two guiding portions 424. When the two paper blocking elements 42 transversely slide, the two sliding blocks 423 of the two paper blocking elements 42 slide in the two sliding grooves 403 of the two sliding rails 41, and the two sliding blocks 423 of the two paper blocking elements 42 project into the interval 411. The arching portions 425 of the two paper blocking elements 42 slide along two front inner walls and two rear inner walls of the two sliding grooves 403. The two guiding portions 424 of the two paper blocking elements 42 are guided along two bottom surfaces of the two guiding straps 404. The two guiding portions 424 of the two paper blocking elements 42 project into the interval 411.

Referring to FIG. 1 to FIG. 7, the base body 10 includes an upper body 10a, and a lower body 10b mounted under the upper body 10a. Two sides of the base body 10 have two rectangular through holes 11 penetrating through a top surface and a bottom surface of the base body 10 along an up-down direction. The two through holes 11 are symmetrical with respect to a middle of the base body 10. A front surface of a middle of a front inner wall and a front surface of a middle of a rear inner wall of each through hole 11 are recessed rearward to form two shaft holes 12 penetrating through a bottom surface of the upper body 10a. Two top surfaces of two outer side walls of the two through holes 11 are recessed downward to form two avoiding grooves 14. Two inner surfaces of two outer side walls of the two avoiding grooves 14 slantwise extend downward and inward to form two inclining surfaces 111.

The two paper guiding elements 20 are pivotally disposed in the two through holes 11 for guiding the papers 300. The two paper guiding elements 20 are mounted between the upper body 10a and the lower body 10b. Two outer sides of the two paper guiding elements 20 project into the two avoiding grooves 14. Each paper guiding element 20 is formed in a rectangular bar shape. Two outer surfaces, two sides of a front surface and two sides of a rear surface of each paper guiding element 20 are recessed inward to form two lacking grooves 201. Each paper guiding element 20 has two shafts 21 and an eccentric element 22. A middle of the front surface and a middle of the rear surface of each paper guiding element 20 protrude oppositely to form the two shafts 21 along a longitudinal direction. Two sides of an inner portion of the shaft 21 which is protruded from the front surface of each paper guiding element 20 transversely extend oppositely to form the eccentric element 22. The eccentric element 22 is a rectangular board shape. The two eccentric elements 22 of the two paper guiding elements 20 are formed between the two front surfaces of the two paper guiding elements 20 and the two shafts 21 which are protruded from the two front surfaces of the two paper guiding elements 20. The eccentric element 22 and the shaft 21 which is protruded from the front surface of each paper guiding element 20 is coaxial.

A front and a rear of a top surface of each paper guiding element 20 slantwise extend downward and outward to form two guiding bevels 23. A front and a rear of a bottom surface of each paper guiding element 20 slantwise extend downward and outward to form the other two guiding bevels 23. The front surface and the rear surface of each paper guiding element 20 are longer than the two outer surfaces of each paper guiding element 20. The two shafts 21 are accommodated in the two shaft holes 12 to fasten the two paper guiding elements 20 in the two through holes 11, and the two paper guiding elements 20 rotate around the two shafts 21. Each paper guiding element 20 rotates in a clockwise direction or an anticlockwise direction. A rotating range of each paper guiding element 20 is from zero degree to three hundred and sixty degrees.

In this preferred embodiment, an inner portion of the shaft hole 12 of the front inner wall of each through hole 11 extends inward and then expands transversely to form an eccentric hole 13. The eccentric hole 13 is wider than the shaft hole 12. The two eccentric elements 22 of the two paper guiding elements 20 are rotatably accommodated in the two eccentric holes 13 of the two through holes 11, so the two paper guiding elements 20 are rotatably disposed in the two through holes 11. Two rear ends of two sides of the eccentric hole 13 of each through hole 11 transversely extend oppositely, then extend outward, and further extend towards two outer surfaces of two side walls of the shaft hole 12 which is connected to a middle of an outer portion of the eccentric hole 13 to form two lying U-shaped restricting grooves 101. Two inner side walls of the two restricting grooves 101 extend downward to form two limiting walls 102. The two limiting walls 102 are located to two sides of a rear end of the eccentric hole 13.

A middle of each clastic element 30 is disposed under one eccentric hole 13, and two sides of each elastic element 30 are restricted in the two restricting grooves 101. Each elastic element 30 is connected with an opening end of the one eccentric hole 13, and each clastic element 30 seals the one eccentric hole 13. The two eccentric elements 22 of the two paper guiding elements 20 are fastened in the two eccentric holes 13 of the two through holes 11 by the two clastic elements 30. The two elastic elements 30 are used for elastically limiting the two paper guiding elements 20 to press the papers 300. The two limiting walls 102 limit the two elastic elements 30 in the two restricting grooves 101. In the preferred embodiment, each clastic element 30 is an elastic strap 31. The two sides of each elastic strap 31 are fixed to two sidewalls of the one eccentric hole 13. Two middles of the two elastic elements 30 abut against the two eccentric elements 22. The two middles of the two clastic straps 31 contact with the two eccentric elements 22.

Referring to FIG. 5 to FIG. 9, when the two paper guiding elements 20 are viewed in directions of the two shafts 21 of the two paper guiding elements 20, two cross sections of the two eccentric elements 22 are disposed as two elongated strap shapes. Two outer contour surfaces of the two eccentric elements 22 of the two paper guiding elements 20 are two smooth curved surfaces. Thus, when the two paper guiding elements 20 rotate, the two eccentric elements 22 of the two paper guiding elements 20 push against the two elastic straps 31, the two elastic straps 31 are stretched by the two eccentric elements 22, and two resilient forces are provided for the two paper guiding elements 20 by the two stretched elastic straps 31 to make the two paper guiding elements 20 return to original positions.

Referring to FIG. 1 to FIG. 11, when the paper 300 is fed by a user, and the paper 300 is long and narrow, two sides of the paper 300 is blocked by the two lateral clamping boards 422 of the two paper blocking elements 42, two inner sides of the two paper guiding elements 20 are raised to press the two sides of the paper 300, the two paper guiding elements 20 have characteristics of returning to the original positions, so the two paper guiding elements 20 exert two forces on the paper 300 which are to be fed to make the paper 300 move towards a center of the base body 10 of the paper feeding tray 100 and close to the top surface of the base body 10.

In a process of feeding the paper 300, the two outer sides of the two paper guiding elements 20 are pressed downward in the two avoiding grooves 14, the two outer sides of the two paper guiding elements 20 are flipped up from two outer sides of the two outer lacking grooves 201, or the outer side of one paper guiding element 20 is pressed downward and the outer side of the other paper guiding element 20 is flipped up from the outer side of the outer lacking groove 201 of the other paper guiding element 20, so the two paper guiding elements 20 rotate, at the moment, the two elastic straps 31 are deformed downward, the two inclining surfaces 111 bring conveniences for the user to press down the two outer sides of the two paper guiding elements 20, flip up the two outer sides of the two paper guiding elements 20, or press down the outer side of the one paper guiding element 20 and flip up the outer side of the other paper guiding element 20, then place the paper 300 which is to be fed between the two paper guiding elements 20 and the base body 10 by the user.

When the two resilient forces are exerted on the two paper guiding elements 20 by the two elastic straps 31, the two paper guiding elements 20 return to the original positions, the two paper guiding elements 20 guide the paper 300 which is to be fed, and the paper 300 which is to be fed is also guided by the two paper blocking elements 42, so that the paper 300 which is to be fed is maintained in a central position of the paper feeding tray 100, and the paper 300 which is to be fed is prevented from tilting or skewing.

Two stretching lengths of the two elastic straps 31 vary according to the two rotating angles of the two paper guiding elements 20. When the rotating angle of each paper guiding element 20 is increased from zero degree to ninety degrees, the elastic strap 31 which contacts with the eccentric element 22 of the rotated paper guiding element 20 is gradually stretched, and the resilient force of the elastic strap 31 gradually reaches a maximum value. After the rotating angle of each paper guiding element 20 exceeds ninety degrees, the stretching length of the elastic strap 31 is decreased, and the resilient force of the clastic strap 31 becomes smaller. The resilient forces of the two elastic straps 31 are different according to different rotating angles of the two paper guiding elements 20, guiding forces provided by the two paper guiding elements 20 which are exerted to the paper 300 which is to be fed, is increased corresponding to an increased thickness of the papers 300 which are to be fed.

A top surface and a bottom surface of the eccentric element 22 of each paper guiding element 20 are wider than two side surfaces of the eccentric element 22 of each paper guiding element 20, and the two side surfaces of the eccentric element 22 of each paper guiding element 20 are convex, so each paper guiding element 20 is driven by one elastic element 30 to return to the original position by rotating a smaller angle. In the preferred embodiment, the smaller angle is less than ninety degrees.

Specifically, when each paper guiding element 20 rotates in a rotating direction, and the rotating angle of each paper guiding element 20 is more than zero degree and less than ninety degrees, each paper guiding element 20 rotates towards a reverse direction which is opposite to the rotating direction to return to the original position under an action of the resilient force of one elastic strap 31. When each paper guiding element 20 rotates in the rotating direction, and the rotating angle of each paper guiding element 20 is more than ninety degrees, and less than three hundred and sixty degrees, each paper guiding element 20 rotates towards the rotating direction to return to the original position under the action of the resilient force of the one elastic strap 31. When each paper guiding element 20 is unused, the rotating angle of each paper guiding element 20 is zero degree, each paper guiding element 20 is located at the original position, and each paper guiding element 20 is received in one through hole 11 of the base body 10 to form a plane. When the rotating angle of each paper guiding element 20 is three hundred and sixty degrees, each paper guiding element 20 rotates to the original position, and each paper guiding element 20 is received in the one through hole 11 of the base body 10 to form the plane.

When each paper guiding element 20 rotates in an anticlockwise direction, and the rotating angle of each paper guiding element 20 is more than zero degree and less than ninety degrees, each paper guiding element 20 rotates in a clockwise direction to return to the original position under the action of the resilient force of the one elastic strap 31. When each paper guiding element 20 rotates in the anticlockwise direction, and the rotating angle of each paper guiding element 20 is more than ninety degrees, and less than three hundred and sixty degrees, each paper guiding element 20 rotates in the anticlockwise direction to return to the original position under the action of the resilient force of the one elastic strap 31.

Referring to FIG. 1 to FIG. 10, in the preferred embodiment, in order to facilitate flipping up or pressing down each paper guiding element 20 by the user, the two outer side walls of the two through holes 11 have the two avoiding grooves 14, each paper guiding element 20 has an I-shaped cross section along the longitudinal direction, and the guiding bevels 23 of the two paper guiding elements 20 are disposed at a front end of the base body 10.

As described above, the two sides of the base body 10 of the paper feeding tray 100 have the two rectangular through holes 11 penetrating through the top surface and the bottom surface of the base body 10 along the up-down direction, the two paper guiding elements 20 are pivotally disposed in the two through holes 11, each paper guiding element 20 has the two shafts 21 and the eccentric element 22, the two sides of the inner portion of the shaft 21 which is protruded from the front surface of each paper guiding element 20 transversely extend oppositely to form the eccentric element 22 which is a rectangular board shape, the two eccentric elements 22 of the two paper guiding elements 20 are accommodated in the two eccentric holes 13 of the two through holes 11, the two middles of the two elastic elements 30 abut against the two eccentric elements 22, when the two eccentric elements 22 rotate, the two elastic elements 30 are stretched, so two resilient forces are provided for the two paper guiding elements 20 by the two elastic elements 30, the paper 300 is pushed by the two paper guiding elements 20 to the center of the base body 10 of the paper feeding tray 100 and close to the top surface of the base body 10 by the two resilient forces, so that a tilt of the paper 300 which is to be fed is prevented. As a result, the paper feeding tray 100 avoids a long and narrow paper 300 skewing from side to side or tilting upward in a feeding process.

Claims

1. A paper feeding tray, comprising: a base body disposed for loading papers which are to be fed, the base body having an upper body, and a lower body mounted under the upper body;two through holes penetrating through a top surface and a bottom surface of the base body along an up-down direction, the two through holes being symmetrical with respect to a middle of the base body, a front surface of a middle of a front inner wall and a front surface of a middle of a rear inner wall of each through hole being recessed rearward to form two shaft holes penetrating through a bottom surface of the upper body, an inner portion of the shaft hole of the front inner wall of each through hole extending inward and then expanding transversely to form an eccentric hole;two paper guiding elements pivotally disposed in the two through holes, the two paper guiding elements being mounted between the upper body and the lower body, a middle of a front surface and a middle of a rear surface of each paper guiding element protruding oppositely to form two shafts along a longitudinal direction, the front surface and the rear surface of each paper guiding element being longer than two outer surfaces of each paper guiding element, two sides of an inner portion of the shaft which is protruded from the front surface of each paper guiding element transversely extending oppositely to form an eccentric element, the eccentric element and the shaft which is protruded from the front surface of each paper guiding element being coaxial, the two shafts being accommodated in the two shaft holes to fasten the two paper guiding elements in the two through holes, and the two paper guiding elements rotating around the two shafts, the two eccentric elements of the two paper guiding elements being rotatably accommodated in the two eccentric holes of the two through holes, so the two paper guiding elements being rotatably disposed in the two through holes; andtwo elastic elements, a middle of each elastic element being disposed under one eccentric hole, each elastic element being connected with an opening end of the one eccentric hole, and each elastic element sealing the one eccentric hole, the two eccentric elements of the two paper guiding elements being fastened in the two eccentric holes of the two through holes by the two elastic elements, two middles of the two elastic elements abutting against the two eccentric elements.

2. The paper feeding tray as claimed in claim 1, wherein two cross sections of the two eccentric elements are disposed as two elongated strap shapes, two outer contour surfaces of the two eccentric elements of the two paper guiding elements are two smooth curved surfaces.

3. The paper feeding tray as claimed in claim 1, wherein two top surfaces of two outer side walls of the two through holes are recessed downward to form two avoiding grooves.

4. The paper feeding tray as claimed in claim 3, wherein two inner surfaces of two outer side walls of the two avoiding grooves slantwise extending downward and inward to form two inclining surfaces.

5. The paper feeding tray as claimed in claim 1, wherein each paper guiding element has an I-shape cross section along the longitudinal direction.

6. The paper feeding tray as claimed in claim 1, further comprising a folding tray, the base body being pivotally connected to the folding tray, and the base body being combined with the folding tray.

7. The paper feeding tray as claimed in claim 6, wherein the folding tray has two sliding rails arranged in two sides of a top of the folding tray, and the two sliding rails are symmetrical with respect to a middle of the folding tray, the paper feeding tray further includes two slidable paper blocking elements slidable disposed on the two sliding rails.

8. The paper feeding tray as claimed in claim 1, wherein a front and a rear of a top surface of each paper guiding element slantwise extend downward and outward to form two guiding bevels, a front and a rear of a bottom surface of each paper guiding element slantwise extends downward and outward to form the other two guiding bevels, the guiding bevels of the two paper guiding elements are disposed at a front end of the base body.

9. The paper feeding tray as claimed in claim 1, wherein each elastic element is an elastic strap, two sides of each elastic strap are fixed to two sidewalls of the one eccentric hole, two middles of the two elastic straps contact with the two eccentric elements.

10. The paper feeding tray as claimed in claim 1, wherein a top surface and a bottom surface of the eccentric element of each paper guiding element are wider than two side surfaces of the eccentric element of each paper guiding element, and the two side surfaces of the eccentric element of each paper guiding element are convex, so each paper guiding element is driven by one elastic element to return to an original position by rotating a smaller angle.

11. The paper feeding tray as claimed in claim 1, wherein when each paper guiding element is unused, each paper guiding element is located at an original position, and each paper guiding element is received in one through hole of the base body to form a plane.

12. The paper feeding tray as claimed in claim 1, wherein each paper guiding element is formed in a rectangular bar shape.

13. The paper feeding tray as claimed in claim 1, wherein the eccentric element is a rectangular board shape.

14. The paper feeding tray as claimed in claim 1, wherein the two eccentric elements of the two paper guiding elements are formed between two front surfaces of the two paper guiding elements and the two shafts which are protruded from the two front surfaces of the two paper guiding elements.

15. The paper feeding tray as claimed in claim 1, wherein two rear ends of two sides of the eccentric hole of each through hole transversely extend oppositely, then extend outward, and further extend towards two outer surfaces of two side walls of the shaft hole which is connected to a middle of an outer portion of the eccentric hole to form two lying U-shaped restricting grooves, two inner side walls of the two restricting grooves extend downward to form two limiting walls, the two limiting walls are located to two sides of a rear end of the eccentric hole, two sides of each elastic element are restricted in the two restricting grooves, the two limiting walls limit the two elastic elements in the two restricting grooves.

16. The paper feeding tray as claimed in claim 1, wherein each paper guiding element rotates in a clockwise direction or an anticlockwise direction, a rotating angle of each paper guiding element is ranged from zero degree to three hundred and sixty degrees.

17. The paper feeding tray as claimed in claim 1, wherein the two outer surfaces, two sides of the front surface and two sides of the rear surface of each paper guiding element are recessed inward to form two lacking grooves.

18. A paper feeding tray, comprising: a base body, two sides of the base body having two through holes penetrating through a top surface and a bottom surface of the base body along an up-down direction, a front inner wall and a rear inner wall of each through hole being recessed to form two shaft holes, an inner portion of at least one of the two shaft holes extending inward and then expanding transversely to form an eccentric hole;two paper guiding elements pivotally disposed in the two through holes, the two paper guiding elements being mounted in the base body, a front surface and a rear surface of each paper guiding element protruding oppositely to form two shafts, a peripheral portion of at least one of the two shafts extending to form an eccentric element, the two shafts being accommodated in the two shaft holes, and the two paper guiding elements rotating around the two shafts, the two eccentric elements of the two paper guiding elements being rotatably accommodated in the two eccentric holes of the two through holes; andtwo elastic elements, a middle of each elastic element being disposed under one eccentric hole, each elastic element being connected with an opening end of the one eccentric hole, and each elastic element sealing the one eccentric hole, two middles of the two elastic elements abutting against the two eccentric elements, a top surface and a bottom surface of the eccentric element being wider than two side surfaces of the eccentric element, and the two side surfaces of the eccentric element being convex, so each paper guiding element being driven by one elastic element to return to an original position.

19. A paper feeding tray, comprising: a base body disposed for loading papers which are to be fed, the base body having an upper body, and a lower body mounted under the upper body, two sides of the base body having two through holes penetrating through a top surface and a bottom surface of the base body along an up-down direction, a front surface of a middle of a front inner wall and a front surface of a middle of a rear inner wall of each through hole being recessed rearward to form two shaft holes penetrating through a bottom surface of the upper body, an inner portion of the shaft hole of the front inner wall of each through hole extending inward and then expanding transversely to form an eccentric hole;two paper guiding elements pivotally disposed in the two through holes for guiding the papers, the two paper guiding elements being mounted between the upper body and the lower body, a middle of a front surface and a middle of a rear surface of each paper guiding element protruding oppositely to form two shafts along a longitudinal direction, the front surface and the rear surface of each paper guiding element being longer than two outer surfaces of each paper guiding element, two sides of an inner portion of the shaft which is protruded from the front surface of each paper guiding element transversely extending oppositely to form an eccentric element, the two shafts being accommodated in the two shaft holes, and the two paper guiding elements rotating around the two shafts, the two eccentric elements of the two paper guiding elements being rotatably accommodated in the two eccentric holes of the two through holes;two elastic elements for elastically limiting the two paper guiding elements to press the papers, a middle of each elastic element being disposed under one eccentric hole, each elastic element being connected with an opening end of the one eccentric hole, and each elastic element sealing the one eccentric hole, two middles of the two elastic elements abutting against the two eccentric elements, a top surface and a bottom surface of the eccentric element being wider than two side surfaces of the eccentric element, and the two side surfaces of the eccentric element being convex, so each paper guiding element being driven by one elastic element to return to an original position by rotating a smaller angle; anda folding tray for receiving the papers, the base body being pivotally connected to the folding tray, the folding tray and the base body being foldable, the folding tray including an upper tray, a lower tray disposed under the upper tray, and two slidable paper blocking elements, the upper tray having two sliding rails, each sliding rail having two sliding boards which are separated from each other to form a sliding groove between the two sliding boards, an interval being formed between a lower surface of the upper tray and an upper surface of the lower tray, the two paper blocking elements being slidably disposed on the two sliding rails, each paper blocking element including a base frame, and a lateral clamping board mounted to an outer side of the base frame, the lateral clamping board being folded to the base frame, or the lateral clamping board being unfolded from the base frame, a middle of a bottom surface of the base frame being connected with a sliding block protruded downward, when the two paper blocking elements transversely slide, the two sliding blocks of the two paper blocking elements sliding in the two sliding grooves of the two sliding rails, and the two sliding blocks projecting into the interval.