CN207903571U - Paper taking mechanism - Google Patents

Abstract

The utility model discloses a get paper mechanism, in the automatic paper feeder, the automatic paper feeder has an organism, should get paper mechanism and include one and advance paper piece, one and get paper module and an at least fender paper piece. The paper feeding piece is arranged on the machine body, and the middle part of the paper feeding piece is provided with a slot; the paper taking module is arranged on the machine body and is arranged on one side of the paper separating roller, the paper taking module is provided with a paper separating roller and a paper taking roller, the paper taking roller is arranged in the open slot, and a paper feeding channel is formed among the paper feeding roller, the paper taking roller and the paper separating roller; the paper blocking piece is pivoted on the machine body and is arranged above the paper taking roller, the paper blocking piece is provided with a contact stopping part, and the contact stopping part is contacted with the paper feeding piece. Therefore, the friction force between the contact stopping part of the paper blocking piece and the paper does not make the paper blocking piece bounce, in the process of feeding the paper, the paper feeding channel is kept at the minimum value, only a single piece of paper is allowed to pass through, and the paper after the second piece of paper is blocked from advancing, so that the occurrence probability of multi-sheet feeding is reduced.

Description

Pick-up mechanism

technical field

The utility model relates to a paper fetching mechanism, in particular to a paper fetching mechanism used in office equipment such as printers, scanners, copiers and facsimile machines.

Background technique

Office equipment such as printers, scanners, copiers, and facsimile machines has a paper-fetching mechanism. In the first prior art, the paper-feeding mechanism includes a swing arm and a paper-fetching roller, and the swing arm contacts the paper-feeding roller to form a closed In the paper feeding channel, the swing arm includes a fixed end and a swing end, and the swing end can contact or move away from the paper pickup roller as it swings. When the paper passes, the paper pushes up the swing arm, creating a very small paper feed channel between the end of the swing arm and the paper pickup roller, allowing the first paper to pass through while providing resistance to the second paper, so that the second paper One sheet is separated from the second sheet.

Specifically, when the paper is not picked up, the weight of the swing arm keeps in contact with the paper pickup roller; when the paper pickup roller rotates in the paper feeding direction, the friction force generated by the rotation of the paper pickup roller on the swing arm is greater than the gravity of the swing arm itself, thus generating a friction The force and friction force become the torque of the swing arm rotation, which makes the swing arm jump continuously, so that the swing arm cannot keep in contact with the paper pickup roller, so the friction force provided to the paper is unstable, which reduces the paper separation ability and stability; when the paper After passing through the contact point between the swing arm and the pick-up roller, the swing end of the swing arm rests on the paper, which also causes the swing arm to bounce continuously due to the friction generated by the paper, reducing the paper separation ability and stability.

In the second prior art, the paper fetching mechanism includes a swing arm and a paper fetching roller. The swing arm does not touch the paper fetching roller. There are paper feed channels on both sides of the paper fetch roller, and the swing end of the swing arm extends below the paper feed channel. And it does not touch the paper feeding channel. Viewed from one side, the swing end of the swing arm partially overlaps with the pick-up roller. The rotation center position of the swing arm can be changed so that the swing arm remains at a fixed position and cannot be bounced off, thus improving the separation. The stability of the paper, but this design does not touch the paper feed channel, because the swing arm overlaps with the paper pickup roller, so that the paper can only pass through the swing arm through the bottom of the swing arm or lift the swing arm and then pass through the swing arm and the paper pick-up roller. Pass between the pickup rollers. If the paper wants to push up the swing arm, it is related to the angle of the slope at the front end of the swing arm. According to the patent description of US Patent No. US9114947B2, when testing the same paper, the smaller the slope angle, the worse the paper separation ability and the better the paper picking ability. Well, on the contrary, the larger the slope angle is, the better the paper separation ability is, and the worse the paper picking ability is. In order to improve the paper separation ability, the angle of the inclined plane is too large; the way the paper passes under the swing arm is limited by the thickness of the paper. Under the same force value of the paper, the deformation of the thick paper is much smaller than that of the thin paper. Therefore, the thick paper cannot be deformed and passes under the swing arm, and the swing arm can only be lifted up. In order to make the thick paper feed smoothly and improve the paper picking ability, the slope angle is too small, and the paper separation ability becomes worse, thereby reducing the thickness of the paper. The paper separation effect of the paper, on the contrary, it is difficult to take the thick paper, and the paper separation effect of the thin paper will be improved. Therefore, there is a contradiction between picking up thick paper and separating thin paper, and only one of them can be selected during design, so the stability of paper separation decreases.

However, none of the above-mentioned prior art can effectively improve the stability of paper separation, and multiple paper feeds are likely to occur.

Utility model content

The purpose of the utility model is to overcome the disadvantages of the above-mentioned prior art, and to provide a paper-taking mechanism with high paper-separating stability.

In order to achieve the above purpose, a paper fetching mechanism provided by the utility model is installed in an automatic paper feeder, the automatic paper feeder has a body, and the paper fetching mechanism includes a paper feeding part, a paper fetching module and at least one stop paper. The paper feeding part is installed on the machine body, and there is a slot in the middle of the paper feeding part; the paper taking module is installed on the machine body and placed on the side of the paper separating roller, and the paper taking module is provided with a paper separating roller and a paper taking roller, The pick-up roller is installed in the slot, and a paper-feed channel is formed between the paper feed member, the pick-up roller and the separation roller; the paper stopper is pivoted on the body and placed above the pick-up roller, and the paper stopper has contact The stopper, the contact stopper contacts the paper feed member.

Further, the paper stopper includes a pivot shaft, the direction of the pivot shaft is perpendicular to the paper feed direction, and the position of the pivot shaft is located in front of the contact point between the contact stopper and the paper feed member.

Further, the machine body includes a machine shell, the machine shell has a pivot hole, and the paper feeding member extends backward at the groove wall at the front end of the slot to form a cam-shaped cam portion; the paper stopper includes a first paper stopper and A second paper stopper, the first paper stopper has a first pivot joint, a first swing arm extending downward and backward from the rear end of the first pivot joint, and a first swing arm bent from the end of the swing arm A first contact stopper part and a connecting arm formed by extending backward and upward from the end of the first contact stopper part. The lower surface of the first contact stopper part is a plane, and a second A pivot shaft, the first paper retaining member is provided with an avoidance groove that runs through the first swing arm, the first contact stop portion and the connecting arm; the second paper retaining member has a second pivot joint and a second pivot A second swing arm is formed by extending the rear end of the connection part backwards and then bending upwards. The middle part of the second swing arm protrudes downwards to form a second contact stop part. The lower surface of the second contact stop part is a plane The two sides of the second pivot joint are protrudingly provided with a second pivot shaft, the first pivot joint and the second pivot joint are pivotally connected in the pivot joint hole of the body shell, the first contact stopper and the second contact stopper The lower surface of the blocking part is in contact with the upper surface of the cam part of the paper feeding part, and the second paper blocking part is accommodated in the escape groove.

Further, the lower surfaces of the first contact stopper and the second contact stopper are planes.

Further, the contact points of the first contact stop part and the second contact stop part and the cam part are not on the same horizontal plane.

Further, the paper blocking member includes a pivot shaft, and the direction of the pivot shaft is parallel to the paper feeding direction.

Further, the machine body includes a machine shell, the machine shell has a pivot hole, and a cam-shaped cam portion protrudes from both sides of the slot on the paper feeding member, and the paper stopper includes a first paper stopper and a paper stopper. The second paper stopper, the first paper stopper has a first pivotal part and a first contact stopper formed by bending outwards and downwards from the end of the first pivotal part, on both sides of the first pivotal part The first pivot shaft is convexly provided; the second paper stop member has a second pivot portion and a second contact stop portion formed by bending outward and downward from the end of the second pivot portion, and the second pivot portion There are second pivot shafts protruding from both sides of the upper part, the first pivot part and the second pivot part are pivotally connected in the pivot hole of the body shell, the first paper stopper and the second paper stopper are in the paper feeding direction Arranged front and back, the lower surfaces of the first contact stopper and the second contact stopper contact the upper surface of the cam part of the paper feeding member.

Further, the lower surfaces of the first contact stopper and the second contact stopper are planes.

Further, the contact points of the first contact stop part and the second contact stop part and the cam part are not on the same horizontal plane.

As mentioned above, the paper-feeding mechanism of the utility model contacts the paper feeder through the contact stopper, so that the friction force between the contact stopper of the paper stopper and the paper does not make the paper stopper bounce off. The paper path is kept at a minimum, allowing only a single sheet to pass through, and blocking the advance of the second sheet and beyond, thereby reducing the probability of multiple feeds.

Description of drawings

Fig. 1 is a perspective view of an embodiment of the paper fetching mechanism of the present invention.

Fig. 2 is a three-dimensional exploded view of the paper taking mechanism of the present invention shown in Fig. 1 .

Fig. 3 is another perspective view of the paper taking mechanism of the present invention shown in Fig. 1 .

Fig. 4 is a side view of the paper taking mechanism of the present invention shown in Fig. 1 .

Fig. 5 is a perspective view of another embodiment of the paper fetching mechanism of the present invention shown in Fig. 1 . Fig. 6 is a three-dimensional exploded view of the paper taking mechanism of the present invention shown in Fig. 5 .

Fig. 7 is a side view of the paper taking mechanism of the present invention shown in Fig. 5 .

The reference numerals of each component in the figure are explained as follows.

The reference signs are as follows:

Pickup Mechanism 100

Paper input 10

Slotted 11

Cam 12

Pick Module 20

separation roller 21

pick roller 22

paper stop 30

first paper stop 31

The first hinge part 311

First swing arm 312

First contact stop 313

Connecting arm 314

First pivot shaft 315

Avoidance groove 316

second paper stop 32

Second pivot 321

Second swing arm 322

Second contact stop 323

Second pivot shaft 324

Chassis 40

Pivot hole 41

Paper path 50

Pickup Mechanism 100’

Paper input 10'

Slotted 11'

Cam 12'

Pickup Module 20'

Separation Roller 21'

Pick roller 22'

Paper stop 30'

The first hinge part 311'

First contact stop 312'

First Pivot Axis 313’

Second stop 32'

The second hinge part 321'

Second contact stop 322'

Second pivot axis 323’

Housing 40'

Pivot hole 41’

Paper feed path 50'.

Detailed ways

In order to describe the technical content, structural features, achieved goals and effects of the present utility model in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

Please refer to Fig. 1 to Fig. 5, it is the first embodiment of the paper taking mechanism 100 of the present invention, the paper taking mechanism 100 of the present utility model is installed in an automatic paper feeder (not shown in the figure), this automatic paper feeder With the function of scanning paper and cards, the automatic document feeder has a body (not shown in the figure), which includes a body shell 40 , and the body shell 40 has a pivot hole 41 . The paper fetching mechanism 100 of the automatic document feeder includes a paper feeding part 10 , a paper fetching module 20 and at least one paper blocking part 30 .

The paper feeding part 10 is installed on the machine body shell 40 , a slot 11 is defined in the middle of the paper feeding part 10 , and a cam-shaped cam part 12 is formed by the paper feeding part 10 extending backward from the front wall of the slot 11 .

The paper fetching module 20 is installed on the body shell 40, and the paper fetching module 20 is used to grab paper and enter the automatic document feeder. The paper roller 22 is installed in the slot 11 , and a paper feeding channel 50 is formed between the paper feeding member 10 , the paper picking roller 22 and the paper separating roller 21 . Specifically, the paper feed channel 50 is formed between the cam portion 12 and the paper pickup roller 22 and the paper separation roller 21 .

The paper stopper 30 is pivotally arranged on the machine body 40 and placed on one side of the paper separation roller 21 . The paper stopper 30 has a contact stopper, and the contact stopper contacts the paper feeder 10 . Specifically, the paper stopper 30 includes a first paper stopper 31 and a second paper stopper 32, the first paper stopper 31 has a first pivotal part 311, a rear end of the first pivotal part 311 toward A first swing arm 312 extending downward and backward, a first contact stopper 313 formed by bending from the end of the first swing arm 312, and a first contact stopper 313 formed by extending backward and upward from the end of the first contact stopper 313 A connecting arm 314, the lower surface of the first contact stopper 313 is a plane, the first pivotal shaft 315 protrudes from both sides of the first pivotal part 311, and the first paper stopper 31 is provided with a penetrating first swing arm 312, the avoidance groove 316 of the first contact stopper 313 and the connecting arm 314; the second paper stopper 32 has a second pivotal joint 321 and a rearward extension from the rear end of the second pivotal joint 321 and then rearward A second swing arm 322 is formed by bending upwards. The middle part of the second swing arm 322 protrudes downward to form a second contact stopper 323. The lower surface of the second contact stopper 323 is a plane. The second pivot joint Second pivot shafts 324 protrude from both sides of 321 .

The first pivotal part 311 and the second pivotal part 321 are pivotally connected in the pivotal hole 41 of the body shell 40, the direction of the first pivotal shaft 315 and the second pivotal shaft 324 are perpendicular to the paper feeding direction, and the first contact The lower surface of the stopper 313 and the second contact stopper 323 contacts the upper surface of the cam portion 12 of the paper feeding member 10, the second paper stopper 32 is accommodated in the escape groove 316, the first contact stopper 313 and the second The contact points of the contact stopper 323 and the cam part 12 are not on the same horizontal plane, and the positions of the first pivotal shaft 315 and the second pivotal shaft 324 are located between the first contact stopper 313 and the second contact stopper 323 and The front of the contact point of the cam portion 12, so that the friction force between the contact stop portion of the paper stopper 30 and the paper can not make the paper stopper 30 bounce off. Allows a single sheet to pass through and blocks the advance of the second and subsequent sheets, reducing the chance of multiple feeds.

Please refer to Fig. 6 and Fig. 7, which are the second embodiment of the paper taking mechanism 100' of the present invention. The paper fetching mechanism 100' of the utility model is installed in an automatic paper feeder (not shown in the figure), and the automatic paper feeder has the function of scanning paper and cards. The automatic paper feeder has a body (not shown in the figure), The body includes a body shell 40', and the body shell 40' has a pivot hole 41'. The paper picking mechanism 100' of the automatic document feeder includes a paper feeding part 10', a paper picking module 20' and at least one paper blocking part 30'.

The paper feeding part 10' is installed on the machine body 40', a slot 11' is opened in the middle of the paper feeding part 10', and a cam-shaped cam is protruded on both sides of the slot 11' on the paper feeding part 10' Section 12'.

The paper fetching module 20' is installed on the body shell 40', the paper fetching module 20' is used to grab paper and enter the automatic document feeder, the paper fetching module 20' is provided with a paper separating roller 21' and a paper fetching The paper roller 22 ′ and the paper pickup roller 22 ′ are installed in the slot 11 ′, and a paper feeding channel 50 ′ is formed between the paper feeding member 10 ′, the paper pickup roller 22 ′, and the paper separation roller 21 ′. Specifically, the paper feed channel 50' is formed between the cam portion 12', the paper pickup roller 22' and the paper separation roller 21'.

The paper stopper 30' is pivotally arranged on the machine body 40' and placed on the side of the paper separation roller 21'. The paper stopper 30' has a contact stopper, and the contact stopper contacts the paper feeder 10'. Specifically, the paper stopper 30' includes a first paper stopper 31' and a second paper stopper 32', the first paper stopper 31' has a first pivotal portion 311' and a first pivotal joint The end of part 311' is bent outwards and downwards to form a first contact stop part 312'. The lower surface of the first contact stop part 312' is a plane, and first pivot joints 311' protrude from both sides. The connecting shaft 313'; the second paper stop member 32' has a second pivot portion 321' and a second contact stop portion 322' formed by bending outward and downward from the end of the second pivot portion 321', The lower surface of the second contact stop portion 322 ′ is flat, and the second pivotal shaft 323 ′ protrudes from both sides of the second pivotal portion 321 ′. The first pivotal part 311' and the second pivotal part 321' are pivotally connected in the pivotal hole 41 of the body shell 40', and the direction of the first pivotal shaft 313' and the second pivotal shaft 323' is related to the paper feeding direction Parallel, the first paper stopper 31' and the second paper stopper 32' are arranged front and back in the paper feeding direction, and the lower surfaces of the first contact stopper 312' and the second contact stopper 322' contact the paper feeder 10' The upper surface of the cam part 12', the contact points of the first contact stop part 312' and the second contact stop part 322' and the cam part 12' are not on the same horizontal plane. In this way, the friction force between the contact stop part of the paper stopper 30' and the paper still does not cause the paper stopper 30' to bounce off. During the paper feeding process, the paper feeding channel 50 is kept at a minimum value, and only a single sheet of paper is allowed to pass through. And block the advance of the paper after the second sheet, thereby reducing the probability of multiple feeding.

When the paper fetching mechanism 100, 100' of the utility model is working, the paper fetching module 20, 20' drives the paper to enter, and the paper is pushed to open the paper retainer 30, 30' to enter, and the paper retainer 30, 30' generates a torque due to its own weight T1, the paper stoppers 30, 30' will press down; there is mutual friction between the first sheet of paper and the paper stoppers 30, 30', and the first sheet of paper will produce a friction in the paper feeding direction against the paper stoppers 30, 30' frictional force, thus generating a torque T2; due to the frictional force between the first paper and the second paper, the first paper will drive the second paper during the feeding process (when it is not separated from the second paper) The paper moves forward, and the second paper touches the paper stopper 30, 30' and is blocked by the paper stopper 30, 30', and the second paper will give the paper stopper 30, 30' a force in the paper feeding direction , thereby generating a torque T3, the rotation directions of the torques T1, T2 and T3 are consistent, which will make the paper stoppers 30, 30' press the first paper more, so that it is not easy to be bounced, thereby reducing the risk of multiple paper feeding probability of occurrence.

As mentioned above, the paper fetching mechanism 100, 100' of the present invention contacts the paper feeding member through the contact stopper part, specifically, the first contact stopper part 313, 312' and the lower surface of the second contact stopper part 323, 322 contact The upper surface of the cam portion 12, 12' of the paper feeding member 10, 10', so that the friction force between the contact stop part of the paper stopping member 30, 30' and the paper does not make the paper stopping member 30, 30' bounce off, and the paper feeding During the process, the paper feed passages 50, 50' are kept at a minimum value, only a single paper is allowed to pass through, and the second and subsequent papers are blocked from advancing, thereby reducing the probability of multiple paper feeds.

Claims (9)

1. A paper fetching mechanism, installed in an automatic paper feeder, the automatic paper feeder has a body, characterized in that: the paper fetching mechanism includes a paper feeding part, a paper fetching module and at least one paper retaining part; The paper feeding part is installed on the machine body, and there is a slot in the middle of the paper feeding part; the paper picking module is installed on the machine body, and the paper picking module is equipped with a paper separating roller and a paper picking roller, and the paper picking roller is installed in the slot Inside, a paper feeding channel is formed between the paper feeding part and the paper picking roller and the paper separation roller; the paper stopper is pivotally arranged on the machine body and placed on the side of the paper separation roller, and the paper stopper has a contact stop part, and the contact stopper contact with the paper input. 2. The paper-feeding mechanism according to claim 1, wherein the paper stopper includes a pivot shaft, the direction of the pivot shaft is perpendicular to the paper feed direction, and the position of the pivot shaft is between the contact stopper and the paper feed direction. In front of the contact point of the paper. 3. The paper-feeding mechanism according to claim 2, characterized in that: the body includes a body shell, the body shell has a pivot hole, and the paper feeding member extends backward at the groove wall at the front end of the slot to form a cam-shaped The cam part; the paper retaining member includes a first paper retaining member and a second paper retaining member, the first paper retaining member has a first pivot joint, and a rear end of the first pivot joint extending downward and backward formed A first swing arm, a first contact stop part formed by bending from the end of the swing arm, and a connecting arm formed by extending backward and upward from the end of the first contact stop part, the lower surface of the first contact stop part It is a plane, and the first pivot joint is protruded on both sides of the first pivot shaft, and the first paper stop is provided with an avoidance groove that runs through the first swing arm, the first contact stopper and the connecting arm; the second paper stop The piece has a second pivot joint and a second swing arm extending backward from the rear end of the second pivot joint and then bent backward and upward. The middle part of the second swing arm protrudes downward to form a second swing arm. The contact stop part, the lower surface of the second contact stop part is a plane, the second pivot joint shaft is protruded on both sides of the second pivot joint part, the first pivot joint part and the second pivot joint part are pivotally connected to the pivot joint of the body shell In the hole, the lower surfaces of the first contact stop part and the second contact stop part contact the upper surface of the cam part of the paper feeding part, and the second paper stop part is accommodated in the escape groove. 4. The paper fetching mechanism according to claim 3, wherein the lower surfaces of the first contact stopper and the second contact stopper are planes. 5 . The paper fetching mechanism according to claim 4 , wherein the contact points between the first contact stopper and the second contact stopper and the cam part are not on the same horizontal plane. 6 . 6 . The paper fetching mechanism according to claim 1 , wherein the paper blocking member comprises a pivot shaft, and the direction of the pivot shaft is parallel to the paper feeding direction. 7 . 7. The paper-feeding mechanism according to claim 6, wherein the body includes a body shell, the body shell has a pivot hole, and a cam-shaped cam is protruded on both sides of the slot on the paper-feeding member. The paper stopper includes a first paper stopper and a second paper stopper, the first paper stopper has a first pivotal part and a bent outward and downward extension from the end of the first pivotal part The first contact stopper part has first pivotal shafts protruding from both sides of the first pivotal part; the second paper stopper has a second pivotal part and a terminal bent outwards and downwards from the end of the second pivotal part A second contact stopper is formed, and second pivot shafts protrude from both sides of the second pivot part. The first pivot part and the second pivot part are pivotally connected in the pivot hole of the body shell. The first The paper stopper and the second paper stopper are arranged back and forth in the paper feeding direction, and the lower surfaces of the first contact stopper and the second contact stopper contact the upper surface of the cam portion of the paper feeder. 8 . The paper fetching mechanism according to claim 7 , wherein the lower surfaces of the first contact stopper and the second contact stopper are planes. 9 . The paper fetching mechanism according to claim 8 , wherein the contact points between the first contact stopper and the second contact stopper and the cam part are not on the same horizontal plane. 10 .