CN102730449A - Paper stop structure - Google Patents

Abstract

The invention discloses a paper blocking structure, which comprises a paper taking arm, a paper guide shell and a paper blocking sheet. A containing groove is arranged on the paper guide shell, and two side walls of the containing groove are respectively provided with a sliding groove. The paper blocking sheet is arranged in the containing groove and moves up and down by the two sliding grooves. When the paper taking arm is positioned at the preparation position, the paper blocking sheet maintains a standing state and protrudes out of the surface of the paper guide shell. When the paper taking arm moves downwards to the paper taking position, the paper blocking sheet starts to rotate and falls into the accommodating groove. The paper blocking structure of the invention requires smaller setting space, so that the whole design can better meet the requirements of lightness, thinness, shortness and smallness.

Description

Paper stop structure

technical field

The invention relates to a paper stop structure, in particular to a paper stop structure applied to an automatic paper feeding device.

Background technique

Multifunctional business machines and scanners are common business machines nowadays. In order to increase the scanning speed by feeding multiple sheets continuously, there are multifunctional business machines and scanners equipped with automatic paper feeding devices. The automatic paper feeding device uses a paper picking arm to feed the paper to be processed into the business machine body one by one for processing. Before the paper is fed, the automatic paper feeding device blocks the paper at the entrance by means of the paper blocking structure, so as to prevent the paper from slipping into the paper feeding channel. Then, when the paper-feeding arm performs the paper-feeding operation, there will be no simultaneous multi-feeding of papers. In addition, in order to maintain the distance between the front and rear paper, after the previous paper is fed into the paper feeding channel, the paper blocking structure blocks the next paper at the entrance, and after the previous paper travels a fixed distance, the latter paper enters the paper feeding channel , to avoid paper overlap or mutual interference during paper feeding.

FIG. 1 is a schematic diagram of a conventional paper retaining structure disclosed by Chinese Taiwan Patent No. I290098. The paper blocking structure 1 in FIG. 1 includes a paper picking arm 11 , a rotating shaft 12 and a paper blocking piece 13 . The pick-up arm 11 includes a protrusion 111 and a blocking piece 112 located on a side thereof. The rotating shaft 12 drives the paper fetching arm 11 to rotate to the standby position or the paper fetching position, and the paper fetching arm 11 in FIG. 1 is located at the paper fetching position. The paper blocking piece 13 includes a pivoting portion 131 , a load portion 132 and a paper blocking portion 133 .

Next, please refer to FIG. 2A to FIG. 2F , which show the flow chart of the paper picking process of the existing paper blocking structure. Referring first to FIG. 2A , when the paper feeding operation has not started, the paper picking arm 11 is at the standby position. At this time, the paper blocking portion 133 engages with the protrusion 111 of the paper fetching arm 11 , so the paper blocking piece 13 maintains a standing state and is not pushed by the paper, but can resist the paper S on the paper feeding path.

Next please refer to FIG. 2B , when the paper feeding operation is ready to start, the paper fetching arm 11 rotates to the paper fetching position. At this time, the protrusion 111 of the paper pickup arm 11 is no longer engaged with the paper stopper 13, so the paper stopper 133 is no longer restricted and can swing freely, while the stopper 112 of the paper pickup arm 11 resists the paper stopper 133 , so that it does not swing toward the paper S on the paper feed path to avoid damaging the paper S.

Please refer to FIG. 2C and FIG. 2D at the same time. When the paper feeding operation starts, the paper S is driven by the paper pick-up arm 11 and moves toward the inside of the automatic paper feeding device 1. At this time, the paper S pushes the paper stopper 133, so that the paper stopper 133 is hidden. Below the paper feeding channel, the paper S is no longer blocked, and the paper S passes through smoothly.

Finally, please refer to FIG. 2E and FIG. 2F , when the paper S completely passes through, the load-bearing part 132 of the paper stopper 13 provides force to make the paper stopper 13 rotate around the pivot part 131 as the axis, so the paper stopper 133 returns to the standing state . Then the paper-feeding arm 11 is lifted upwards to the ready position, and the paper stopper 133 engages with the protrusion 111 of the paper-feeding arm 11 again, and no longer swings freely, so as to continue resisting other papers S on the paper feeding path.

Based on the above description, it can be seen that the paper blocking structure 1 blocks paper from entering the paper feeding channel through the paper blocking piece 13 that can be engaged with the paper fetching arm 11 .

The existing paper stop structure 1 has the following problems. As mentioned above, the paper blocking portion 133 of the paper blocking sheet 13 needs to engage with the protrusion 111 of the paper fetching arm 11 , so that the paper blocking sheet 13 can play the paper blocking function. Under long-term use, the paper stopper 13 is likely to be deformed, causing the paper stopper 133 to fail to engage with the protrusion 111 of the pick-up arm 11, and the paper stopper 13 cannot perform the function of the paper stopper, so the paper stopper structure 1 It is easy to cause problems such as multiple paper feeding, and it is necessary to replace a new paper blocking sheet 13, which is extremely inconvenient for the user.

Therefore, an improved paper stop structure is needed to overcome the problems of the existing paper stop structure.

Contents of the invention

The object of the present invention is to provide a paper stop structure that reduces the risk of failure due to self-deformation and saves installation space.

The present invention provides a paper stop structure for an automatic paper feeding device, comprising:

A pick-up arm, including a protrusion on its side, wherein the pick-up arm is rotated to a ready position or a pick-up position, when the pick-up arm is in the pick-up position, the pick-up arm performs feeding paper action;

A paper-guiding housing, including an accommodating slot located below the paper-taking arm, wherein the accommodating slot includes a first side wall and a second side wall opposite to each other and are respectively arranged on the first side wall and the second side wall two sliding grooves of the two side walls; and

A paper blocking piece, located under the protrusion of the paper-taking arm, the paper blocking piece includes two protruding shafts on both sides, and the two protruding shafts are respectively installed in the two sliding grooves, so that the paper blocking piece is in the The sliding groove moves up and down.

In a preferred embodiment, there is a distance between the two protruding shafts and the bottom of the paper blocking sheet.

In a preferred embodiment, the accommodating groove further includes a third side wall perpendicular to the first side wall and the second side wall, wherein a bottom of the third side wall has a notch.

In a preferred embodiment, it further includes two positioning hooks respectively located on the outer sides of the two sliding grooves for supporting the two protruding shafts when the paper blocking piece moves to the bottom of the two sliding grooves.

In a preferred embodiment, the accommodating tank further includes two fixing posts perpendicular to the first side wall and the second side wall respectively, and a hole is formed at the bottom of the accommodating tank.

In a preferred embodiment, it further includes an elastic element passing through the two fixing columns, and one side of the elastic element protrudes from the bottom of the accommodating groove, and the other side of the elastic element is located at the bottom of the paper retaining sheet. Below the two protruding axes.

In a preferred embodiment, the elastic element is a double torsion spring, and the other side of the double torsion spring has two parallel torsion spring arms.

The installation space required by the paper stop structure of the present invention is relatively small, so that the overall design can better meet the requirement of lightness, thinness and compactness.

Description of drawings

FIG. 1 shows a schematic diagram of an existing paper retaining structure.

FIG. 2A to FIG. 2F show the flow charts of the paper picking process of the existing paper blocking structure.

FIG. 3A shows a perspective view of a paper blocking structure according to a preferred embodiment of the present invention.

FIG. 3B shows a partial cross-sectional view of a paper retaining structure according to a preferred embodiment of the present invention.

FIG. 4A is an exploded schematic view of the front side of the paper guide housing of the paper stop structure according to a preferred embodiment of the present invention.

FIG. 4B is an exploded schematic diagram of the bottom surface of the paper guide housing of the paper retaining structure according to a preferred embodiment of the present invention.

FIG. 5A shows a perspective view of the paper blocking structure of a preferred embodiment of the present invention when the paper feeding operation has not started.

FIG. 5B shows a perspective view of the paper blocking structure of a preferred embodiment of the present invention when the paper feeding operation is ready to start.

FIG. 5C shows a perspective view of the paper blocking structure of a preferred embodiment of the present invention when the paper feeding operation starts.

Wherein, the reference signs are explained as follows:

Paper blocking structure 1 Second sliding groove 221d

Pick-up arm 11 Two fixed columns 221e

Bump 111 Perforated hole 221f

Block 112 Block 23

Rotating shaft 12 Two protruding shafts 231

Paper block 13 upper part 232

Pivot 131 Lower half 233

Load section 132 Distance D

Paper blocking part 133 Positioning hook 24

Paper S Elastic element 25

Paper blocking structure 2 Spiral part 251

Paper picking arm 21 Two first torsion spring arm 252

Rotating shaft 211 Second torsion spring arm 253

bump 212

Paper guide housing 22

Storage tank 221

First side wall 221a

Second side wall 221b

The third side wall 221c

Notch 221ca

Detailed ways

According to a specific embodiment of the present invention, a paper blocking structure is provided, which can be applied to paper feeding of business machines.

Please refer to FIG. 3A and FIG. 3B , FIG. 3A shows a perspective view of a paper stop structure according to a preferred embodiment of the present invention, and FIG. 3B shows a partial cross-sectional view of a paper stop structure according to a preferred embodiment of the present invention. The paper blocking structure 2 includes a paper fetching arm 21 , a paper guide housing 22 and a paper blocking sheet 23 .

Please refer to FIG. 4A and FIG. 4B at the same time. FIG. 4A shows an exploded view of the paper guide housing 22 of a paper stop structure in a preferred embodiment of the present invention, and FIG. 4B shows the bottom surface of the paper guide housing 22 of the paper stop structure. Breakdown diagram. The paper fetching arm 21 includes a rotating shaft 211 and a protrusion 212 . The paper guide housing 22 includes a receiving slot 221, wherein the receiving slot 221 includes a first side wall 221a, a second side wall 221b, a third side wall 221c, two sliding slots 221d, two fixing columns 221e and a hole 221f. The paper blocking piece 23 includes two protruding shafts 231 . In addition, the paper stop structure 2 further includes a positioning hook 24 and an elastic element 25 , wherein the elastic element 25 has two helical parts 251 , two parallel first torsion spring arms 252 and second torsion spring arms 253 .

Next, the assembly sequence of the paper retaining structure of a preferred embodiment of the present invention will be described. The paper fetching arm 21 passes through the rotating shaft 211 and is disposed above the paper guide housing 22 , and the protrusion 212 is located on a side of the paper fetching arm 21 . The accommodating groove 221 is located on the paper guide housing 22 and below the protrusion 212 of the paper fetching arm 21, the first side wall 221a and the second side wall 221b of the accommodating groove 221 face each other, and the two sliding grooves 221d are respectively arranged on The first side wall 221a and the second side wall 221b, and the third side wall 221c is perpendicular to the first side wall 221a and the second side wall 221b, and includes a gap 221ca at the bottom of the third side wall 221c, and the two fixing columns 221e The inner surfaces of the first sidewall 221 a and the second sidewall 221 b are respectively perpendicular to each other, and the hole 221 f is located at the bottom of the receiving groove 221 . The paper blocking piece 23 is arranged under the paper picking arm 21 , and the two protruding shafts 231 are located on both sides thereof and have a distance D from the bottom of the paper blocking piece 23 , so that the paper blocking piece 23 is divided into an upper half 232 and a lower half 233 , Moreover, the two protruding shafts 231 pass through the two sliding grooves 221d respectively. The two positioning hooks 24 are respectively located on the outside of the sliding groove 221d. The two helical parts 251 of the elastic element 25 respectively pass through the two fixing posts 221e, the second torsion spring arm 253 protrudes from the bottom of the receiving groove 221, and the two first torsion spring arms 252 are respectively located on the two protruding shafts 231 of the paper blocking piece 23. below. In addition, the elastic element 25 is a double torsion spring in this embodiment.

Next, the operating principle of this embodiment will be described. Please refer to FIG. 5A to FIG. 5C at the same time. FIG. The perspective view of the paper stop structure of the preferred embodiment when the paper feeding operation is ready to start, FIG. 5C shows a perspective view of the paper stop structure of a preferred embodiment of the present invention when the paper feeding operation starts. When the paper feeding operation has not yet started, the paper fetching arm 21 is driven by the rotating shaft 211 to rotate to the ready position, as shown in FIG. One upward supporting force, so the two protruding shafts 231 move to the top of the two sliding grooves 221d, the upper half 232 of the paper blocking piece 23 protrudes from the surface of the paper guide housing 22, and the lower half 233 of the paper blocking piece 23 is located in the accommodating The groove is in close contact with the third side wall 221c. When the front end of the paper pushes against the upper half 232 of the paper blocking piece 23, the lower half of the paper blocking piece 23 is blocked by the third side wall 221c of the accommodating groove 221 and cannot move, so the paper blocking piece 23 cannot move with two protruding shafts. 231 is the rotation of the axis, so the paper blocking piece 23 is not pushed by the paper and maintains a standing state, so as to prevent the paper from entering the inside of the paper guide housing 22 .

When the paper feeding operation is ready to start, as shown in Figure 5B, the paper pick-up arm 21 is driven by the rotating shaft 211 and begins to move downward, so the protrusion 212 of the paper pick-up arm 21 presses the paper stop piece 23 downward, so that the paper stop piece 23 The two protruding shafts 231 move downward along the two sliding grooves 221d until the two protruding shafts 231 collide with the two positioning hooks 24 . At this time, the lower half 233 of the paper blocking piece 23 is out of the restriction of the third side wall 221c, and the notch 221ca at the bottom of the third side wall 221c provides a space for the paper blocking piece 23 to rotate.

Then the paper-feeding arm 21 continues to descend, and the paper stopper 23 starts to rotate toward the accommodation groove 221 with the two protruding shafts 231 as the axis. As shown, the paper blocking piece 23 falls into the accommodating groove 221 and no longer maintains a standing state, so the paper can be fed into the interior of the automatic paper feeding device 2 through the paper guide housing 22 .

After the paper feeding is completed, the paper fetching arm 21 is again driven by the rotating shaft 211 to lift up to the ready position, and the paper blocking piece 23 returns to the standing state by the force of the elastic element 25 and protrudes from the surface of the paper guide housing 22, continuing to block the paper Enter the inside of the paper guide housing 22 .

As can be seen from the above preferred embodiments, the present invention makes the paper stop structure 2 unnecessary to additionally provide the paper pick-up arm 21 and the paper stop 23 by means of the paper pick-up arm 21, the accommodation groove 221 of the paper guide housing 22 and the paper stop piece 23 With the snap-fit structure, the paper blocking sheet 23 can maintain a standing state and protrude from the surface of the paper guide housing 22, so the deformation of the paper blocking sheet 23 is not easy to affect its paper blocking function. After the paper stopper 23 moves downward for a certain distance, the two protruding shafts 231 are restricted by the two positioning hooks 24, so that the paper stopper 23 cannot continue to move downward, so the required height of the accommodating groove 221 is smaller than that of the paper stopper. 23, moreover, when the paper blocking sheet 23 starts to rotate with the two protruding shafts 231 as the axis, the upper half 232 of the paper blocking sheet 23 is dumped in the accommodating groove 221, and the bottom of the accommodating groove 221 only needs to provide The rotation space of the lower half 233 of the paper blocking piece 23 , based on the above, the installation space required by the paper blocking structure 2 of the present invention is smaller, so that the overall design can better meet the requirements of lightness, thinness and compactness.

The above-described embodiments are only to illustrate the technical ideas and characteristics of the present invention, and its purpose is to enable those of ordinary skill in the art to understand the content of the present invention and implement it accordingly. When it cannot limit the scope of the claims of the present invention, that is, All equivalent changes or modifications made according to the spirit disclosed in the present invention should still fall within the scope of the claims of the present invention.

Claims (7)

1. a retaining paper structure is used for an automatic paper feeder, it is characterized in that, comprising:

One gets the paper arm, comprises a prominent piece that is positioned at its side, and wherein this is got the paper arm and is turned to a ready position or and gets the paper position, and when this was got the paper arm and is positioned at this and gets the paper position, this was got the paper arm and carries out the paper feed action;

One leads the paper housing, comprises being positioned at the storage tank that this gets paper arm below, and wherein this storage tank comprises: a relative the first side wall and one second sidewall, and two sliding trays that are arranged at this first side wall and this second sidewall respectively; And

One paper blocking piece, what be positioned at that this gets the paper arm should prominent piece below, and this paper blocking piece comprises the two prominent axles that are positioned at its both sides, and this two prominent axle is arranged in this two sliding tray respectively, and this paper blocking piece is moved up and down in this sliding tray.

2. retaining paper structure as claimed in claim 1 is characterized in that, a distance apart between the bottom of this two prominent axle and this paper blocking piece.

3. retaining paper structure as claimed in claim 1 is characterized in that, this storage tank also comprises one three sidewall vertical with this first side wall and this second sidewall, and wherein the bottom of the 3rd sidewall has a breach.

4. retaining paper structure as claimed in claim 1 is characterized in that, also comprises two location trips, lays respectively at the outside of this two sliding tray, supports this two prominent axle when moving to this two sliding trays bottom at this paper blocking piece.

5. retaining paper structure as claimed in claim 1 is characterized in that this storage tank also comprises two fixed legs, and respectively perpendicular to this first side wall and this second sidewall, and this storage tank bottom has a holes.

6. retaining paper structure as claimed in claim 5 is characterized in that, comprises that also an elastic element is arranged in this two fixed leg, and a side of this elastic element stretches out this storage tank bottom, and an opposite side of this elastic element is positioned at this two prominent axles below of this paper blocking piece.

7. retaining paper structure as claimed in claim 6 is characterized in that, this elastic element is a torsion spring, and this opposite side of this torsion spring has two parallel torsion spring arms.

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