ADF paper blocking device and printer

Abstract

The utility model relates to an ADF paper blocking device which comprises a frame. The paper blocking plate is rotationally embedded in the frame, and the paper blocking plate has a paper blocking state in which the paper blocking plate is overturned upwards relative to the upper surface of the frame and a paper passing state in which the paper blocking plate is attached to the upper surface of the frame; the shifting mechanism is rotationally arranged on the frame, the shifting mechanism comprises a shifting rod, and the shifting rod can rotationally push the paper blocking plate to a paper blocking state or rotationally release thrust on the paper blocking plate so that the paper blocking plate can fall to a paper passing state; the limiting piece is arranged on the frame, and the limiting piece is located behind the shifting rod when the shifting rod is located at the position where the paper blocking plate is pushed to be in the paper blocking state; and the driving mechanism is arranged on the frame and is in transmission connection with the shifting mechanism. According to the ADF paper blocking device, the paper blocking state can be effectively guaranteed, and the situation that the paper blocking plate is pushed over based on thrust is avoided. The utility model also relates to a printer using the ADF paper blocking device.

Description

Technical Field

[0001] The utility model relates to an ADF paper blocking device and also relates to a printer applying the ADF paper blocking device. Background Art

[0002] Automatic document feeders (also known as ADFs) are used to automatically input documents and are found in copiers, scanners, and fax machines. Users no longer need to place documents one by one, greatly improving the efficiency of the entire machine. ADFs are typically equipped with a paper stop. When the paper is being fed between two predetermined positions, the stop restricts the position of the paper on the paper tray along the paper feed path, creating a sense of obstruction and stopping the paper at the appropriate position. This reduces the risk of skew, jams, and other poor paper separation during transport, and improves the stability of the automatic document feeder. The printer's ADF should switch between paper stop and paper feed functions as needed during printing.

[0003] The Chinese utility model patent "New ADF Paper Stopping Mechanism" with announcement number CN212608332U (application number 202020048131.8) discloses a paper stopping mechanism, including a bracket, a paper stopping rod and a driving mechanism. The paper stopping rod is rotatably arranged on the back of the bracket. A blocking piece extending to the side is provided on the outer peripheral wall of the paper stopping rod. An opening is provided on the bracket for the blocking piece to pass through and allows the blocking piece to rotate. Under the action of gravity, the paper stopping rod always maintains a tendency to cover the opening for paper passing; the driving mechanism is arranged on the bracket and connected to the end of the paper stopping rod, which is used to drive the paper stopping rod to rotate so that the blocking piece forms an angle with the opening to block the paper. The utility model has a simple and reasonable structure. The paper blocking and paper passing states are switched by the driving mechanism to control the rotation of the paper blocking rod. When the paper blocking rod is flipped over so that the blocking piece covers the opening, the paper passing state is reached. When the driving mechanism cancels the driving force on the paper blocking rod, the paper blocking rod automatically flips over under the action of gravity so that the blocking piece and the opening are at a certain angle, thus reaching the paper blocking state. The driving mechanism 3 includes a rotating seat 31, a transmission sleeve 32, and a spring 33. The rotating seat 31 is rotatably arranged on the side of the bracket 1 and is arranged near the end of the paper blocking rod 2. A rocker arm 311 is provided on the outer peripheral wall of the rotating seat 31, extending toward the end of the paper blocking rod 2. The rocker arm 311 abuts against a portion of the paper blocking rod 2, thereby driving the paper blocking rod 2 to rotate. The first end of the transmission sleeve 32 is connected to the rotating seat 31, and the second end of the transmission sleeve 32 is provided with a transmission gear 321. The end of the rocker arm 311 has a first extension piece 313. Correspondingly, the lower side of the paper stop rod 2 is provided with a second extension piece 24 that bends toward the rocker arm 311 and can abut against the lower end face of the first extension piece 313. This structure facilitates the cooperation between the rotating seat 31 and the paper stop rod 2, and the rotation of the rotating seat 31 drives the paper stop rod 2 to rotate. The transmission gear 321 can be connected to the output shaft of the motor through other gears to drive the rotating seat 31 to rotate, thereby toggling the paper stop rod 2 to control its rotation. When a large amount of paper is placed in the paper stop mechanism of this structure and the thrust of the user when placing the paper is too large, the lever will overcome the resistance of the rotating seat, drive the rotating seat to rotate and reset to the paper passing state, thereby causing the paper stop to fail. Further, it will cause the paper to be placed too deep, resulting in a high probability of paper jam and repeated delivery. Utility Model Content

[0004] The first technical problem to be solved by the present invention is to provide an ADF paper blocking device which can effectively ensure the paper blocking state and avoid the paper blocking board being pushed down due to the thrust in the prior art.

[0005] The second technical problem to be solved by the present invention is to provide a printer using the aforementioned ADF paper stop device in response to the above-mentioned prior art.

[0006] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: an ADF paper blocking device, comprising

[0007] frame;

[0008] A paper stopper is rotatably embedded in the frame, and the paper stopper has a paper stopper state in which it is turned upward relative to the upper surface of the frame, and a paper passing state in which it is attached to the upper surface of the frame;

[0009] A toggle mechanism is rotatably mounted on the frame, the toggle mechanism comprising a toggle lever, the toggle lever being capable of rotating to push the paper stopper to a paper blocking state or rotating to release the thrust on the paper stopper so that the paper stopper falls to a paper passing state;

[0010] A limiting member is provided on the frame, and is located behind the shift lever when the shift lever is in a position of pushing the paper stopper to a paper stopper state;

[0011] The driving mechanism is arranged on the frame and is in transmission connection with the toggle mechanism.

[0012] Preferably, the paper stopper includes a paper stopper portion located above the frame and a transmission portion located below the frame, and the shifting rod can act on the transmission portion based on rotation.

[0013] In order to ensure smooth paper passage when the paper stopper is in a paper passing state, a groove matching the paper stopper portion of the paper stopper is provided on the upper surface of the frame, and the paper stopper is embedded in the groove based on the falling rotation of the paper stopper.

[0014] In order to make it easier for the toggle mechanism to push the paper stopper, the paper stopper is a first flat plate, and the transmission part includes a second flat plate and a third flat plate with an angle greater than 90°. The first flat plate is connected to the second flat plate and the angle is greater than 90°.

[0015] The structure is simple. The shifting mechanism further comprises a rotating shaft rotatably supported on the frame and connected to the driving mechanism. The shifting rod is sleeved on the rotating shaft. The shifting rod can rotate around the outer periphery of the limiting member based on the rotation of the rotating shaft.

[0016] The structure is simple. The driving mechanism is arranged at one end of the frame. The driving mechanism includes a motor and a transmission gear set connected to the driving end of the motor. The rotating shaft is connected to the output gear of the transmission gear set.

[0017] Preferably, the frame includes a first frame body and a second frame body which are matched with each other to form a mounting cavity, the shifting mechanism is arranged in the mounting cavity, and the limiting member is arranged on the inner wall of the first frame body.

[0018] The technical solution adopted by the present invention to solve the second technical problem is: a printer, including a housing and an ADF paper stopper as mentioned above, wherein the ADF paper stopper is arranged behind the paper placement area in the housing.

[0019] Compared with the prior art, the advantages of the present invention are: the ADF paper stop device in the present invention is provided with a toggle mechanism that can act on the paper stop to realize the paper stop state and paper passing state of the paper stop, and a limiter is also provided. When the user pushes the paper hard and causes the paper stop to retreat horizontally, the limiter restricts the retreat of the toggle lever, thereby stopping the toggle lever from releasing and rotating the paper stop, thereby avoiding the problem of the paper stop falling to the paper passing state due to the increased paper pushing force, effectively avoiding the problem of paper being placed too deep, and correspondingly avoiding the situation of paper jam and re-feeding in the subsequent paper passing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the ADF paper stop device in an embodiment of the present invention.

[0021] Figure 2 This is a cross-sectional view of the paper stopper in the embodiment of the present invention when it is in the paper stopper state.

[0022] Figure 3 This is a cross-sectional view of the paper retaining plate in the paper roll state in the embodiment of the present invention.

[0023] Figure 4 This is an exploded view from a top view of the ADF paper stopper in an embodiment of the present invention.

[0024] Figure 5 This is an exploded view from a bottom angle of the ADF paper stopper in an embodiment of the present invention.

[0025] Figure 6 It is a three-dimensional diagram of a printer in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0027] like Figures 1 to 5 As shown, the ADF paper blocking device in this embodiment includes a frame 1, a paper blocking paper 2, a shifting mechanism 3, a limiting member 4, and a driving mechanism 5.

[0028] Frame 1 is used to mount the paper retainer 2, the shifting mechanism 3, the position limiting member 4, and the drive mechanism 5, and is then installed and used within the printer housing 6. To facilitate installation, frame 1 includes a first frame body 11 and a second frame body 12 that mate to form a mounting cavity. Specifically, first frame body 11 and second frame body 12 are joined in a vertical direction.

[0029] The paper retainer 2 is rotatably mounted on the frame 1. To facilitate rotatable mounting, the left and right sides of the paper retainer 2 are provided with rotating shafts 32, which allow the paper retainer 2 to be rotatably mounted on the frame 1. The paper retainer 2 can have a paper retaining state, flipped upward relative to the upper surface of the frame 1, and a paper passing state, attached to the upper surface of the frame 1.

[0030] The toggle mechanism 3 is rotatably mounted on the frame 1, specifically within the mounting cavity. In this embodiment, the toggle mechanism 3 comprises a lever 31 and a shaft 32 rotatably supported on the frame 1. The shaft 32 extends leftward and rightward within the mounting cavity, and the lever 31 is tightly fitted onto the shaft 32. This allows the lever 31 to be mounted based on the rotation of the shaft 32. The lever 31 rotates based on the shaft 32, thereby pushing the paper stop 2 to a paper blocking position. The lever then releases the force on the paper stop 2, causing it to drop to a paper passing position.

[0031] Due to the position of the lever 31 within the mounting cavity, to facilitate the linkage between the lever 31 and the paper retainer 2, the paper retainer 2 in this embodiment includes a paper retainer portion 21 located above the frame 1 and a transmission portion 22 located below the frame 1. This allows the lever 31 to act on the transmission portion 22 of the paper retainer 2 through rotation. Furthermore, based on the structure of the paper retainer 2, a strip opening is provided axially on the upper frame of the frame 1, and the paper retainer 2 is rotatably connected to this opening.

[0032] To facilitate the movement of the paper stop 2 by the toggle mechanism 3, and to ensure that the toggle lever 31 can more stably act on the paper stop 2 during rotation, applying or releasing a thrust to the paper stop 2, the paper stop portion 21 in this embodiment is a first flat plate, and the transmission portion 22 includes a second flat plate 221 and a third flat plate 222, which are connected at an angle greater than 90°. This allows the toggle lever 31 to act on the third flat plate 222 in a direction perpendicular to the third flat plate 222, thereby more stably pushing the paper stop 2 to rotate.

[0033] The drive mechanism 5 is disposed on the frame 1 and is in transmission connection with the toggle mechanism 3. Specifically, the drive mechanism 5 is connected to the rotating shaft 32 in the toggle mechanism 3. When the drive mechanism 5 is in operation, the rotating shaft 32 is driven to rotate. In this embodiment, the drive mechanism 5 is disposed at one end of the frame 1 and includes a motor 51, a transmission gear set 52 connected to the driving end of the motor 51, and the rotating shaft 32 is connected to the output gear of the transmission gear set 52.

[0034] The limiter 4 is disposed on the setting frame 1, specifically on the inner wall of the first frame 11. In this embodiment, the limiter 4 is integrally formed on the inner wall of the first frame 11. The limiter 4 is located behind the lever 31 when the lever 31 is in the position pushing the paper stop 2 to the paper blocking state. Thus, the limiter 4 forms a limit behind the lever 31. When the user pushes the paper backward, the lever 31 can abut against the limiter 4 due to the thrust, preventing the lever 31 from rotating due to the thrust. This maintains the paper stop 2 in the paper blocking state and prevents the paper stop 2 from falling to the paper passing state due to the thrust. This further avoids problems such as paper jams and paper re-feeding during printing caused by placing the paper too deep.

[0035] In addition, in order to avoid the restriction of the rotation of the lever 31 by the limit member 4 and ensure the normal rotation of the lever 31 in the installation cavity, the lever 31 is set to a position where it can rotate around the outer periphery of the limit member 4 based on the rotation of the rotating shaft 32, so that the limit member 4 will not interfere with the rotation of the lever 31.

[0036] The upper surface of the frame 1 is also provided with a groove 10 that matches the paper stop part 21 of the paper stop 2. The paper stop part 21 is embedded in the groove 10 based on the falling rotation of the paper stop 2, thereby ensuring the overall flatness of the upper surface of the frame 1, avoiding jamming when the paper passes through, and improving the smoothness of the paper passing when the paper stop 2 is in the paper passing state.

[0037] The ADF paper stopper device of the present invention is provided with a toggle mechanism 3 capable of acting on the paper stopper 2 to realize the paper stopping state and paper passing state of the paper stopper 2, and a limiter 4 is further provided. When the user pushes the paper hard to make the paper stopper 2 retreat horizontally, the limiter 4 restricts the retreat of the toggle lever 31, thereby stopping the toggle lever 31 from releasing and rotating the paper stopper 2, thereby avoiding the problem that the paper stopper 2 falls to the paper passing state due to the increased paper pushing force, effectively avoiding the problem of paper being inserted too deep, and correspondingly avoiding the situation of paper jam and repeated feeding in the subsequent paper passing process.

[0038] like Figure 6 As shown, the printer in this embodiment includes a housing 6 and the aforementioned ADF paper stopper, which is disposed behind the paper placement area within the housing 6. Specifically, a paper placement board is disposed in front of the ADF paper stopper within the housing 6 and is flush with the upper surface of the frame 1.

[0039] When the printer is working, if it is in a non-paper-passing working state, the drive mechanism 5 will drive the rotating shaft 32 to rotate, and then drive the lever 31 to push the paper stop 2 to rotate, so that the paper stop 2 flips up to the paper-passing state. In this working state, after placing the paper on the paper board, the user usually pushes the front position of the paper frame 1 backward until it stops at the position where the paper stop 2 stops the paper. Based on the paper-passing effect of the paper stop 2, the paper will not be placed too deep. Also based on the limiting effect of the limiter 4, the situation of pushing the paper to move deeper and backward is avoided. When the printer is in the paper-passing state, the drive mechanism 5 will drive the rotating shaft 32 to rotate in the opposite direction, releasing the thrust of the lever 31 on the paper stop 2, and the paper stop 2 rotates and falls to the paper-passing state position based on gravity. Based on the working characteristics of the ADF paper-passing device, the printer in this embodiment has better paper-passing quality when printing.

[0040] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and elements of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed herein can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. An ADF paper stopper, comprising Framework (1); Its characteristics are: Also includes A paper stopper (2) is rotatably embedded in the frame (1), wherein the paper stopper (2) has a paper stopper state in which it is turned upward relative to the upper surface of the frame (1), and a paper passing state in which it is attached to the upper surface of the frame (1); A toggle mechanism (3) is rotatably mounted on the frame (1), and the toggle mechanism (3) includes a toggle lever (31). The toggle lever (31) can rotate to push the paper stopper (2) to a paper-blocking state, or rotate to release the thrust on the paper stopper (2) so that the paper stopper (2) falls to a paper-passing state. A limiting member (4) is provided on the frame (1), wherein the limiting member (4) is located behind the shifting rod (31) when the shifting rod (31) is in a position for pushing the paper stopper (2) to a paper stopper state; The driving mechanism (5) is arranged on the frame (1) and is in transmission connection with the toggle mechanism (3).

2. The ADF paper stopper according to claim 1, wherein: The paper stopper (2) comprises a paper stopper portion (21) located above the frame (1) and a transmission portion (22) located below the frame (1); the shifting rod (31) can act on the transmission portion (22) based on rotation.

3. The ADF paper stopper according to claim 2, wherein: A groove (10) matching the paper stop portion (21) of the paper stopper (2) is provided on the upper surface of the frame (1), and the paper stop portion (21) is embedded in the groove (10) based on the falling rotation of the paper stopper (2).

4. The ADF paper stopper according to claim 2, wherein: The paper blocking portion (21) is a first flat plate, the transmission portion (22) comprises a second flat plate (221) and a third flat plate (222) with an included angle greater than 90°, and the first flat plate is connected to the second flat plate (221) with an included angle greater than 90°.

5. The ADF paper stopper according to any one of claims 1 to 3, wherein: The shifting mechanism (3) further comprises a rotating shaft (32) rotatably supported on the frame (1) and connected to the driving mechanism (5); the shifting rod (31) is sleeved on the rotating shaft (32); and the shifting rod (31) can rotate around the outer periphery of the limiting member (4) based on the rotation of the rotating shaft (32).

6. The ADF paper stopper according to claim 5, wherein: The driving mechanism (5) is arranged at one end of the frame (1), and comprises a motor (51), a transmission gear set (52) connected to the driving end of the motor (51), and the rotating shaft (32) is connected to the output gear of the transmission gear set (52).

7. The ADF paper stopper according to any one of claims 1 to 3, wherein: The frame (1) comprises a first frame body (11) and a second frame body (12) which are aligned with each other to form a mounting cavity. The shifting mechanism (3) is arranged in the mounting cavity, and the limiting member (4) is arranged on the inner wall of the first frame body (11).

8. A printer comprising a housing (6), characterized in that: It also includes an ADF paper stopper as claimed in any one of claims 1 to 7, wherein the ADF paper stopper is arranged behind the paper placement area in the housing (6).

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