CN2459712Y - Automatic paper feeder - Google Patents

Abstract

An automatic paper feeder is composed of paper feeding box for paper to be fed, elastic sheet (Mylar) on said paper feeding box and elastically supported by said paper feeding box, and elastic sheet with joint part and bearing part for tightly sticking it to paper feeding box.

Description

Automatic paper feeder

The utility model relates to an automatic document feeder (Automatic Document Feeder, ADF), in particular to an automatic document feeder which utilizes the elastic support of an elastic sheet (Mylar) to be fed to bring the paper in smoothly.

In machines with ADF, such as office machines such as scanners, photocopiers, printers, and fax machines, whether the paper can be brought in smoothly is a very important function. Taking the scanner as an example, the most important point that the scanner with ADF is superior to the flatbed scanner is that a large amount of paper can be placed on the ADF at one time for use, which saves time and efficiency and greatly improves the performance of the flatbed scanner. Only the mechanical action of putting paper one by one. Traditionally, due to the limitations of image processing speed and memory capacity, the ADF requires little paper for feeding. Compared with today’s computerization of everything, especially under the demand of office automation, the demand for data is huge, and the paper capacity The more sheets you put in at one time, the more you can solve the problem of insufficient data demand, and the more time-saving and efficient you will be. However, due to the limitation of the structural design of the traditional ADF for bringing paper into it, the space of the paper tray of the ADF is also limited. For example: when the space design of the paper tray in the ADF is large, when a small amount of paper is placed in the paper tray, the paper cannot touch the rollers of the ADF and cannot be brought into the paper feeding mechanism; when the ADF is in When the space design of the paper tray is small, the paper is easily blocked by the rollers of the ADF, so it is impossible to put a large amount of paper in the paper tray. Therefore, in the structure of the ADF, a design was developed in which an elastic device and a supporting plate were added to the paper tray.

Please refer to FIG. 1A , which shows a structural sectional view of a conventional automatic paper feeding device 100 . In FIG. 1A , the automatic paper feeding device 100 is used to feed the paper 102 to be fed, for example, to feed the paper 102 to be fed into business machines such as printers, photocopiers, scanners and fax machines. The automatic paper feeding device 100 includes a paper feeding box 104 , an automatic paper feeding roller set 106 , a supporting plate 108 and an elastic device 111 . The paper tray 104 is used to place the paper 102 to be fed, and the rim of the automatic paper feeding roller set 106 is adjacent to the paper feeding pad 110 to form a feeding end 112, and the automatic paper feeding roller set 106 is formed with the wheel shaft 116 as the center of the circle. Rotate clockwise to drive the paper 102 to be fed forward. Wherein, one end of the support plate 108 is connected to the paper tray 104 by a pivot bolt 115 , and one end of the elastic device 111 is fixed in the groove 113 of the paper tray 104 . The other end of the elastic device 111 is fixed on the supporting plate 108 so that there is an angle θ1 between the supporting plate 108 and the paper tray 104 . On the supporting plate 108 , as the number of papers placed on the supporting plate 108 increases, the gravitational force on the elastic device 111 increases, and the angle θ1 between the supporting plate 108 and the paper tray 104 becomes smaller. Therefore, the supporting plate 108 supports the paper 102 to be fed by the elastic force of the elastic device 111 . In a natural state, the front end of the paper to be fed 102 slides in from the paper tray 104 and contacts the feeding end 112 , so that the automatic paper feeding roller set 106 can drive the paper to be fed 102 forward.

Please refer to FIG. 1B , which is a cross-sectional view of the structure of the automatic paper feeding device for placing the paper stack 114 in FIG. 1A . In FIG. 1B , a paper stack 114 is placed on the paper tray 104 , wherein the paper stack 114 includes paper 102 a , 102 b , paper stack 114 a and paper 102 c from top to bottom. Since the downward gravity of the paper stack 114 is much greater than the gravity of the single paper 102 in FIG. 1A , the angle θ2 between the support plate 108 and the paper tray 104 in FIG. 1B is smaller than the angle θ1 in FIG. 1A . At the same time, the leading edge of the paper stack 114 is in contact with the paper feeding pad 110 , and the leading edge of the paper 102 a just abuts against the feeding end 112 .

When the automatic paper feeding roller set 106 starts to rotate around the wheel shaft 116 , since the leading edge of the paper 102 a is against the feeding end 112 , the rotation of the automatic paper feeding roller set 106 will drive the paper 102 a to move toward the feeding end 112 . Therefore, when the paper 102a completely passes through the feeding end 112 and is driven forward by the automatic paper feeding roller group 106, through the upward elastic force of the elastic device 111, the leading edge of the paper 102b can then be pressed against the feeding end 112 to automatically feed the paper. The roller set 106 drives the paper 102b forward as described above. In this way, when the amount of paper in the paper stack 114 is getting less and less, correspondingly, the downward gravity of the paper stack 114 is also getting smaller and smaller, and due to the upward elastic force of the elastic device 111, the support plate 108 and the paper feeding The included angle θ2 of the cassette 104 is getting bigger and bigger, so as to support the weight of the remaining paper in the paper stack 114, and make the leading edge of the remaining paper in the paper stack 114 abut against the feeding end 112 in sequence, so that the automatic paper feeding The roller set 106 can sequentially drive the papers of the paper stack 114 forward.

When the automatic paper feeding roller group 106 drives the paper 102a, 102b and the paper stack 114a one by one and completely feeds them into the MFP (not shown), only the paper 102c is left on the paper tray 104 at this time. 1A is the same, because the upward elastic force of the elastic device 111 makes the angle θ2 between the supporting plate 108 and the paper tray 104 larger, so as to push the paper 102c upward, so that the front edge of the paper 102c is against the feeding end 112 , so the automatic paper feeding roller set 106 can drive the paper 102c to the feeding end 112 to complete the automatic paper feeding step of the automatic paper feeding device 100 .

However, the above-mentioned automatic paper feeding device 100 uses the support plate 108 and the elastic device 111 to push up the paper to be fed sequentially, so that the uppermost paper can be against the feeding end 112. However, the design of using the elastic device 111 on the paper tray 104 to rotate the support plate 108 up and down to support the paper to be fed is complicated in structure, difficult to assemble in the production process, and high in cost.

The purpose of this utility model is to provide an automatic paper feeding device, which can effectively support the paper to be fed on the paper cassette by designing a simple elastic sheet on the paper cassette, so that the paper to be fed can be sequentially and smoothly Through the simple design of the elastic sheet, not only the complexity of the design of the paper tray and the cost of the required materials are greatly reduced, but also the assembly is quite easy.

The purpose of this utility model is achieved by providing an automatic paper feeding device, including: a paper feeder for placing a paper to be fed; and an elastic sheet (Mylar) positioned on the paper feeder for The paper to be fed can be resisted in a springable manner, and the elastic sheet includes: a joint part, which is closely attached to the paper tray; and a supporting part, which is connected to the paper tray. There is an included angle between them for bouncing the paper to be fed.

In addition, the automatic paper feed roller set is included, which is located at the bottom of the paper tray to feed the paper to be fed.

The advantage of the utility model device is that it uses the simple design of the elastic sheet on the paper tray to support the paper to be fed, so that the automatic paper feeding roller group can drive the paper to be fed to the feeding end sequentially and smoothly. The design of the paper feeding device is simple, and the cost of materials and assembly can be greatly reduced.

Below in conjunction with accompanying drawing, describe the embodiment of utility model in detail, wherein:

FIG. 1A is a structural sectional view of a traditional automatic paper feeding device;

Figure 1B is a cross-sectional view of the structure of the automatic paper feeding device in Figure 1A where the paper is stacked;

Fig. 2A is a structural cross-sectional view of an automatic paper feeding device in a preferred embodiment of the present invention;

Figure 2B is a cross-sectional view of the structure of the automatic paper feeding device in Figure 2A where the paper is stacked;

Fig. 3A is a structural sectional view of an automatic paper feeding device in another preferred embodiment of the present invention;

FIG. 3B is a cross-sectional view of the structure of the automatic paper feeding device in which the stack of papers is placed in FIG. 3A .

Please refer to FIG. 2A , which is a structural cross-sectional view of an automatic paper feeding device 200 according to a preferred embodiment of the present invention. In FIG. 2A , the automatic paper feeding device 200 is used to feed the paper 202 to be fed into business machines (not shown) such as printers, photocopiers, scanners and fax machines. The automatic paper feeding device 200 includes a paper feeding tray 204 , an automatic paper feeding roller set 206 and an elastic device (Mylar) 208 . The paper tray 204 is used to place the paper 202 to be fed, and the automatic paper feeding roller set 206 and the paper feeding pad 210 are located at the bottom of the paper tray 204, and the rim of the automatic paper feeding roller set 206 is adjacent to the paper feeding pad 210 In addition, the automatic paper feeding roller set 206 rotates clockwise around the wheel shaft 216 to drive the paper 202 forward. Wherein, the elastic sheet 208 includes a joint portion 208a and a supporting portion 208b. The joint portion 208a is tightly attached to the paper tray 204, and the angle β1 is formed between the supporting portion 208b and the paper tray 204. With the elastic sheet 208 The more the amount of supporting paper, the smaller the angle β1. Under natural conditions, the elastic sheet 208 supports the paper 202 to be fed through the elasticity of the elastic sheet 208, so that the front end of the paper 202 to be fed is in contact with the feeding end 212, so that the automatic The paper feeding roller set 206 can drive the paper 202 to be fed to the feeding end 212 .

Please refer to FIG. 2B , which is a cross-sectional view of the structure of the automatic paper feeding device 200 shown in FIG. 2A with the paper stack 214 placed therein. In FIG. 2B , a stack of papers 214 is placed on the paper tray 204 , wherein the stack of papers 214 includes papers 202 a , 202 b , paper stack 214 a and paper 202 c from top to bottom. Because the downward gravitational force of the paper stack 214 is much greater than the gravitational force of the single paper to be fed 202 in FIG. smaller than β1. Even the bottom surface of the supporting portion 208 b of the elastic sheet 208 contacts the paper tray 204 . At the same time, the leading edge of the paper stack 214 touches the feeding pad 210 , and the leading edge of the paper 202 a just touches the feeding end 212 .

When the automatic paper feeding roller set 206 starts to rotate around the wheel shaft 216 , since the leading edge of the paper 202a touches the feeding end 212 , the rotation of the automatic paper feeding roller set 206 will drive the paper 202a to move toward the feeding end 212 . Therefore, when the paper 202a is completely driven by the automatic paper feeding roller set 206 through the feeding end 212, the leading edge of the paper 202b touches the feeding end 212 through the upward elastic force of the elastic sheet 208, and the automatic paper feeding roller set 206 also The paper 202b can be driven by the process as described above. In this way, when the amount of paper in the paper stack 214 becomes less and less, relatively, the downward gravity of the paper stack 214 becomes smaller and smaller, and due to the upward elastic force of the elastic device 208, the support portion 208b and the paper tray The angle β2 between 204 is getting bigger and bigger, so as to support the remaining paper weight of the paper stack 214, and make the leading edge of the remaining paper in the paper stack 214 contact the feeding end 212 in sequence, so that the automatic paper feeding roller group 206 can sequentially drive the paper of the paper stack 214 forward.

When the automatic paper feeding roller group 206 drives the paper 202a, 202b and the paper stack 214a successively and completely feeds them into the MFP, only the paper 202c is left on the paper tray 204 at this time, and the situation is the same as that in FIG. 2A, because The upward elastic force of the elastic sheet 208 makes the angle β2 between the support portion 208b and the paper tray 204 larger, so as to push the paper 202c upwards, so that the front edge of the paper 202c is against the feeding end 212, so that the feeding end 212 is automatically fed. The paper roller set 206 can drive the paper 202c to the feeding end 212 to complete the automatic paper feeding process of the automatic paper feeding device 200 .

Please refer to FIG. 3A , which is a structural cross-sectional view of an automatic paper feeding device 300 according to a preferred embodiment of the present invention. In FIG. 3A , the automatic paper feeding device 300 is used to feed the paper 302 to be fed into business machines (not shown) such as printers, photocopiers, scanners and fax machines. The automatic paper feeding device 300 includes a paper tray 304 , an automatic paper feeding roller set 306 and an elastic sheet 308 . The paper tray 304 is used to place the paper 302 to be fed, and the automatic paper feeding roller set 306 and the paper feeding pad 310 are located at the bottom of the paper tray 304, and the rim of the automatic paper feeding roller set 306 is adjacent to the paper feeding pad 310 In addition, the rim of the automatic paper feed roller set 306 is in contact with the paper feed pad 310 at the bottom of the paper tray 304 to form the feed end 312, and the automatic paper feed roller set 306 is formed by the axle 316 is that the center of the circle rotates clockwise to drive the paper 302 forward. Wherein, the elastic sheet 308 further includes a joint part 308a, a supporting part 308b and a bending part 308c, the joint part 308a is closely attached to the paper tray 304, and the supporting part 308b and the paper tray 304 have an angle β3, There is also a fixed or variable angle α between the bent portion 308 c and the supporting portion 308 b , and the end of the bent portion 308 c fits into the groove 313 of the paper tray 304 . As the amount of paper supported by the elastic sheet 308 increases, the angle β3 becomes smaller, and the bending part 308c can slide in and out of the groove 313 in the groove 313, so under natural conditions, the elastic sheet 308 passes through the elastic sheet 308. The paper to be fed 302 is elastically supported so that the front end of the paper to be fed 302 is in contact with the feeding end 312 , so that the automatic paper feeding roller set 306 can drive the paper to be fed 302 to the feeding end 312 .

Please refer to FIG. 3B , which is a cross-sectional view of the structure of the automatic paper feeding device 300 shown in FIG. 3A with the paper stack 314 placed therein. In FIG. 3B , the stack of papers 314 is placed on the paper tray 304 , wherein the stack of papers 314 includes papers 302 a , 302 b , paper stack 314 a and paper 302 c from top to bottom. Because the downward gravitational force of the paper stack 314 is much greater than the gravitational force of the single paper to be fed 302 in FIG. ) is smaller than β3, and the bending part 308c slides from outside to inside in the groove 313, even causing the bottom surface of the supporting part 308b of the elastic sheet 308 to contact the paper tray 304, and the bending part 308c is completely embedded in the groove 313 middle. At the same time, the leading edge of the paper stack 314 touches the feeding pad 310 , and the leading edge of the paper 302 a just touches the feeding end 312 .

When the automatic paper feeding roller set 306 starts to rotate around the wheel shaft 316 , since the leading edge of the paper 302a touches the feeding end 312 , the rotation of the automatic paper feeding roller set 306 will drive the paper 302a to move toward the feeding end 312 . Therefore, when the paper 302a is completely driven by the automatic paper feeding roller group 306 through the feeding end 312, the leading edge of the paper 302b touches the feeding end 312 through the upward elastic force of the elastic sheet 308, and the automatic paper feeding roller group 306 also The paper 302b can be driven by the process as described above. In this way, when the amount of paper in the paper stack 314 becomes less and less, relatively, the downward gravity of the paper stack 314 becomes smaller and smaller, and due to the upward elastic force of the elastic sheet 308, the support portion 308b and the paper tray The angle β4 between 304 is getting larger and larger, in order to support the remaining paper (weight) of the paper stack 314, and make the leading edge of the remaining paper of the paper stack 314 against the feeding end 312 in sequence, so that the automatic feeding The paper roller set 306 can sequentially drive the papers of the paper stack 314 forward.

When the automatic paper feeding roller group 306 drives the paper 302a, 302b and the paper stack 314a one by one and completely feeds them into the MFP, only the paper 302c is left on the paper tray 304, and the situation is the same as that in FIG. 3A, because The upward elastic force of the elastic sheet 308 increases the angle β4 between the supporting portion 308b and the paper tray 304, and the bending portion 308c slides in the groove 313 from the inside to the outside to push the paper 302c upward, so that The front edge of the paper 302c is against the feeding end 312 , so the automatic paper feeding roller set 306 can drive the paper 302c to the feeding end 312 to complete the automatic paper feeding process of the automatic paper feeding device 300 .

According to the automatic paper feeding device of this embodiment, when the user takes out all the papers that have been placed in the paper tray, it can avoid the frictional contact between the bottommost paper and the elastic sheet, and easily bring up the elastic sheet to damage the elasticity. Flakes.

Claims (8)

1. An automatic paper feeding device, characterized in that it comprises: a paper feeder for placing a paper to be fed; Against the paper to be fed, the elastic sheet includes: a joint part, the joint part is closely attached to the paper tray; and a supporting part, the support part is connected to the paper tray There is an included angle between them, which is used to bounce the paper to be fed. 2. The automatic paper feeding device according to claim 1, further comprising: an automatic paper feeding roller set, which is located at the bottom of the paper tray for feeding the paper to be fed. 3. The automatic paper feeding device according to claim 1, further comprising: a paper feeding pad, which is located at the bottom of the paper feeding box and is in contact with the rim of the automatic paper feeding roller set for to feed the paper to be fed. 4. The automatic paper feeding device according to claim 1, wherein the paper to be fed is a paper. 5. The automatic paper feeding device according to claim 1, wherein the paper to be fed is a stack of paper. 6. The automatic paper feeding device according to claim 1, wherein the elastic sheet further comprises: a bending portion, which is located at the end of the supporting portion and bends toward one side of the paper tray . 7. The automatic paper feeding device according to claim 6, further comprising: a groove, which is located on the paper tray and corresponds to the bending part, and the bending part is inserted into the groove. 8 . The automatic paper feeding device according to claim 7 , wherein when the supporting portion is pressed down, the bending portion is slidably inserted into the groove toward the groove.

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