CN110843356A - Paper blocking mechanism - Google Patents

Abstract

The invention relates to a paper blocking mechanism, which comprises a rod body, a blocking strip connected to the rod body, a frame arranged at one end of the rod body, and a driving mechanism connected between the frame and the rod body, and is characterized in that: actuating mechanism includes drive assembly and transmission assembly, transmission assembly connects between drive assembly and the body of rod, be provided with the torsional spring that can carry out the compression on the body of rod rotation direction between transmission assembly and the body of rod. This keep off paper mechanism on the basis of increase blend stop swing angle scope, homoenergetic normally accomplishes the work of keeping off paper under the condition of placing different paper volumes, so reduced because the paper is put the occurrence probability that paper slip caused the phenomenon of sending again of rubbing paper when not standardizing or printing last time, reduce the waste of paper, promoted customer satisfaction.

Description

a paper stopper

technical field

The invention relates to the technical field of printers, in particular to a paper stop mechanism of a printer.

Background technique

The printer needs to rub the paper in the first step before printing. As the paper is rubbed in, it will drive the paper below to slide inward. Especially for the paper placed at an angle, the slippage of the paper is more serious. For example, the authorization announcement number is CN1107014C (patent). No. 99802916.5) Chinese invention patent "Paper Alignment Device", which discloses a printer in which the paper placed in it is placed obliquely, and the paper is prone to slide down during the paper feeding process. Therefore, in order to prevent the paper from sliding and affecting the normal paper feeding, it is necessary to use the paper stopper mechanism to perform the paper stopper action before the paper is pulled in. After completion, the stopper in the paper stopper mechanism must return to the lowest point to avoid obstruction to the paper pick-up action. . When the paper enters the printing stage, the stop bar will return to the maximum paper feeding position, and the above actions will be repeated until the next printing starts.

The Chinese invention patent with publication number CN109715537A (application number 201780054280.6) "Paper Feeding Device, Paper Processing Device Using the Paper Feeding Device, and Image Forming Device", wherein the alignment member can be coupled to a pivot shaft, and a lever is provided on one of the pivot shafts on the end. The lever may be fixed to the pivot shaft, and the cam gear may switch the alignment member between the alignment position and the transfer allowing position according to the rotational phase of the cam gear, and the cam gear may include a gear portion and a cam portion. A toothless portion is partially provided on the gear portion. The cam portion has a cam profile for switching the alignment member between the alignment position and the transfer permitting position. The cam portion is connected to the rod. The cam portion can contact the lever and pivot the pivot shaft to switch the alignment member to the aligned position. When the contact between the cam portion and the lever is terminated, the holder presses the alignment member due to the elastic force of the first elastic member, and thus the alignment member can be pivoted to the transfer allowing position. However, in this structure, since the length of the rod is fixed, the rotation angle of the pivot shaft is limited, and the aligning member cannot be driven to pivot to the transfer permitting position, and additional components are required to complete the action. In addition, when this structure is applied to a printer that places paper at an angle, when a large amount of paper or very little paper is placed, the alignment member will also be stuck due to a limited swing angle or cannot swing to a position where a small amount of paper is aligned. .

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a method for the above-mentioned prior art that can adjust the swing angle range of the barrier bar under the condition that the driving angle remains unchanged, so that the paper stop work can be completed normally under the condition of placing different amounts of paper. The paper stop mechanism of the printer.

The technical solution adopted by the present invention to solve the above problems is as follows: a paper blocking mechanism, comprising a rod body, a blocking bar connected to the rod body, a frame arranged at one end of the rod body, and a driving mechanism connected between the frame and the rod body, characterized in that : The driving mechanism includes a driving component and a transmission component that can drive the blocking bar to swing within the range of the position where the least paper is aligned and the position allowing the paper to pass through, the transmission component is connected between the driving component and the rod body, and the transmission component is connected to the rod body. A torsion spring capable of compressing in the rotation direction of the rod body is arranged between the rod bodies.

In order to facilitate the connection between the transmission mechanism and the rod body, the transmission mechanism includes a first transmission member disposed at the end of the rod body, and the end of the rod body is extended with a linkage piece axially outward, and the link piece passes through the torsion. Both ends of the spring are limitedly connected to the first transmission member along the circumferential direction.

The structure is simple and the installation is convenient, the first transmission member is provided with a groove facing the opening of the rod body, and the torsion spring is provided in the groove; the groove wall of the groove is provided with a limit hole, and the torsion spring is One end is matched and placed in the limiting hole, the groove wall of the groove is also provided with a limiting notch that allows the other end of the torsion spring to swing circumferentially, and the other end of the torsion spring abuts on one side of the limiting notch On the upper side, the linkage piece extends into the groove and is circumferentially limited between the two ends of the torsion spring.

In order to ensure that the rod body can rotate in the circumferential direction more smoothly, the cross-section of the linkage piece is arc-shaped.

Preferably, the central angle corresponding to the limiting notch is less than 90°.

In order to facilitate limit installation and avoid moving in the direction, the end of the rod body is axially extended with a connecting portion, the linkage piece extends outward from the connecting portion, and the first transmission member is sleeved on the rod body through a groove. on the connection part.

Preferably, the transmission mechanism further includes a second transmission member rotatably connected to the frame, and a third transmission member eccentrically connected to the first transmission member and the second transmission member respectively.

Preferably, the second transmission member is provided with a connecting arm extending in the radial direction, the connecting arm is connected with a transmission rod, and the frame is provided with an arc for inserting the transmission rod and matching the swing range of the limit rod hole.

The structure is simple, the drive assembly includes a drive source and a planetary gear set arranged on the frame, the drive source is in driving connection with the input wheel in the planetary gear set, and the output wheel in the planetary gear set is sleeved on the transmission rod. superior.

Preferably, the driving source is a motor.

Compared with the prior art, the present invention has the advantages that the paper stop mechanism in the present invention can drive the stop bar on the rod body to swing within the range between the position for aligning the minimum paper and the position for allowing paper transmission, and when placing different numbers of When the stop bar cannot be swung to the minimum paper position due to the paper, the transmission mechanism and the rod body can be rotated relative to each other due to the compression of the torsion spring under the action of the torsion spring, that is, when the transmission mechanism rotates, the rod body can not be rotated. , so that the transmission components can operate normally. Therefore, on the basis of increasing the swing angle range of the blocking bar, the paper stop mechanism can normally complete the paper stop work under the condition of placing different amounts of paper, thus reducing the paper slippage due to irregular paper placement or the last printing. This results in the probability of paper pick-up and re-feeding, reducing paper waste and improving customer experience.

Description of drawings

FIG. 1 is a perspective view of a paper stop mechanism in an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the paper stop mechanism in the embodiment of the present invention.

FIG. 3 is a cross-sectional view of the paper stop mechanism in the embodiment of the present invention.

FIG. 4 is a schematic diagram of the installation of the paper stop mechanism in the printer according to the embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.

As shown in FIGS. 1 to 4 , the paper blocking mechanism in this embodiment includes a rod body 1 , a blocking bar 2 , a frame 3 , a driving mechanism and a torsion spring 4 .

The rotating limit of the rod body 1 is installed in the casing of the printer, and the blocking bar 2 is connected to the rod body 1 for aligning the paper placed in the printer. A plurality of blocking bars 2 can be provided as required, and each blocking bar 2 is connected to the rod body 1 at intervals, so that the blocking bars 2 can swing with the rotation of the rod body 1, thereby realizing the alignment of the paper and allowing the paper to pass through for printing. .

The driving mechanism in this embodiment is connected to the rod body 1 in a driving manner, and is further used to drive the rod body 1 to rotate. The driving mechanism includes a driving component (not shown in the figure) and a transmission component drivingly connected with the driving component, wherein the driving component includes a driving component. The source and the planetary gear set connected to the output end of the drive source, the drive source in this embodiment is a motor, the output end of the drive source is connected to the input wheel in the planetary gear set, and the transmission assembly is connected to the output wheel of the planetary gear set. Between the rod body 1 and the transmission assembly and the rod body 1, a torsion spring 4 capable of compressing in the rotation direction of the rod body 1 is arranged.

As shown in FIGS. 1 to 3 , the specific transmission assembly includes a first transmission member 5 , a second transmission member 6 and a third transmission member 7 .

As shown in FIG. 3 , the first transmission member 5 is arranged at the end of the rod body 1 , the first transmission member 5 is provided with a groove 51 that faces the rod body 1 , and the torsion spring 4 is arranged in the groove 51 . A limit hole 52 is provided on the groove wall of the groove 51, and one end of the torsion spring 4 is matched and placed in the limit hole 52. In this embodiment, a shaft is arranged in the center of the groove 51, and the torsion spring 4 is sleeved in the limit hole 52. on this axis. The groove wall of the groove 51 is also provided with a limit notch 53 that allows the other end of the torsion spring 4 to swing in the circumferential direction, and the other end of the torsion spring 4 abuts on one side of the limit notch 53 . The central angle corresponding to the limiting notch 53 is less than 90°. In this way, there is a compression amount of less than 90° in the circumferential direction between the two ends of the torsion spring 4 .

The end of the rod body 1 is extended with a connecting part 12 in the axial direction, and the linkage piece 11 with an arc-shaped cross-section continues to extend outward from the connecting part 12 in the axial direction. The linkage piece 11 extends into the groove 51 and is limited between the two ends of the torsion spring 4 in the circumferential direction. Since the setting positions of the frame 3 and the rod body 1 are relatively fixed in the printer, this structure ensures the firmness of the connection between the rod body 1 and the first transmission member 5, and the force of the torsion spring 4 is sufficient to realize the connection between the linkage piece 11 and the first transmission member 5. Synchronous rotation of the transmission member 5.

The second transmission member 6 is rotatably connected to the frame 3 through a shaft on the frame 3 . The second transmission member 6 is provided with a connecting arm 61 extending in the radial direction. A transmission rod 62 is connected in the direction, the output wheel in the planetary gear set is sleeved on the transmission rod 62, and the frame 3 is provided with an arc-shaped hole 31 for the transmission rod 62 to be inserted and matching the swing range of the limit rod.

Both ends of the second transmission member 6 are eccentrically connected to the first transmission member 5 and the third transmission member 7 respectively.

In this embodiment, the rotational relationship between the transmission assembly and the rod body 1 is: when the driving transmission rod 62 rotates about 65° around the shaft body in one direction, through the relative relationship between the third transmission and the first transmission member 5, the gear bar first rotates 50° to the position where it has the least paper, then reverse 100° to the position that allows the paper drive to pass.

The working process of the paper stop mechanism in this embodiment is as follows: as shown in FIG. 3 , the initial position of the stop bar 2 is the position where the stop bar 2 is aligned with the paper when a standard quantity of paper is placed in the printer. After receiving the printing instruction, the printer controls the motor to work, and then drives the planetary gear set to rotate, and then drives the transmission rod 62 to rotate, and the corresponding second transmission member 6 rotates, thereby driving the third transmission member 7 and the first transmission member. 5 to rotate, and under the action of the connection between the first transmission member 5 and the rod body 1, the stop bar 2 is driven to swing in the direction of aligning the paper. The driving rod body 1 rotates synchronously relative to the first transmission member 5, and then drives the blocking bar 22 to gradually swing to a position where the minimum amount of paper is placed and aligned, thereby aligning the paper placed in the printer. However, if a large amount of paper is placed in the printer at this time, when the drive bar 2 swings to a position aligned with the existing amount of paper, the bar 2 cannot continue to swing, and the first transmission member 5 continues to rotate. The linkage piece 11 stops moving, and at this time, the linkage piece 11 swings from the end of the compression torsion spring 4 into the limiting notch 53 , avoiding the situation that the first transmission member 5 cannot rotate. As the motor continues to rotate, the first transmission member 5 continues to rotate, and under the working action of the transmission assembly, drives the blocking bar 2 to swing in the direction that allows the paper to pass through. If a lot of paper is placed in the printer, the compressed torsion spring 4 is also gradually released and finally returns to the initial position. The first transmission member 5 drives the linkage piece 11 to move synchronously, and then gradually drives the blocking bar 2 to completely fall down so that the paper can pass through. Then, the printer will pick up the paper. After the paper pickup is completed, while the printer is printing, it will control the motor to reverse, and then drive the first transmission member 5 to reverse, and then drive the rod body 1 to rotate, so that the blocking bar 2 is gradually reset to the initial position. This is repeated to realize the paper feeding of the printer. During the whole working process, the drive source, transmission components, and drive components have stable transmission, output a large and stable force when aligning the paper, and can drive the stop bar 2 to achieve a large-angle swing, and can place different numbers of paper in the printer. can ensure the normal operation of the printer. In this way, the probability of paper pickup and refeed caused by irregular paper placement or paper slippage during the last printing is reduced, paper waste is reduced, and customer satisfaction is improved.

Claims (10)

1. The utility model provides a keep off paper mechanism, includes the body of rod (1), connects blend stop (2) on the body of rod (1), sets up frame (3) in body of rod (1) one end, connects the actuating mechanism between frame (3) and the body of rod (1), its characterized in that: actuating mechanism includes drive assembly and transmission assembly, transmission assembly connects between drive assembly and the body of rod (1), be provided with between transmission assembly and the body of rod (1) and carry out the torsional spring (4) that compress on the body of rod (1) direction of rotation.

2. The paper stop mechanism of claim 1, wherein: the transmission mechanism comprises a first transmission piece (5) arranged at the end part of the rod body (1), a linkage piece (11) extends outwards along the axial direction at the end part of the rod body (1), and the linkage piece (11) is connected to the first transmission piece (5) in a limiting mode along the circumferential direction at the two ends of the torsion spring (4).

3. The paper stop mechanism of claim 2, wherein: the first transmission piece (5) is provided with a groove (51) facing the opening of the rod body (1), and the torsion spring (4) is arranged in the groove (51); be equipped with spacing hole (52) on the cell wall of recess (51), the one end matching of torsional spring (4) is put into in spacing hole (52), still be equipped with on the cell wall of recess (51) and allow torsional spring (4) other end circumference wobbling spacing breach (53), the other end of torsional spring (4) supports on a side of spacing breach (53), linkage piece (11) stretch into in recess (51) and along circumference spacing between the both ends of torsional spring (4).

4. The paper stop mechanism of claim 3, wherein: the cross section of the linkage sheet (11) is arc-shaped.

5. The paper stop mechanism according to claim 3 or 4, wherein: the central angle corresponding to the limiting notch (53) is smaller than 90 degrees.

6. The paper stop mechanism according to claim 3 or 4, wherein: the end of the rod body (1) extends along the axial direction to form a connecting part (12), the linkage piece (11) extends outwards from the connecting part (12), and the first transmission piece (5) is sleeved on the connecting part (12) of the rod body (1) through the groove (51).

7. The paper stop mechanism according to any one of claims 2 to 4, wherein: the transmission mechanism further comprises a second transmission piece (6) rotationally connected to the frame (3), and a third transmission piece (7) eccentrically connected with the first transmission piece (5) and the second transmission piece (6) respectively.

8. The paper stop mechanism of claim 7, wherein: the upper portion of the second transmission piece (6) extends along the radial direction to form a connecting arm (61), the connecting arm (61) is connected with a transmission rod (62), and an arc-shaped hole (31) which is used for enabling the transmission rod (62) to be placed in and matched with the swing range of the limiting rod is formed in the frame (3).

9. The paper stop mechanism of claim 7, wherein: the driving assembly comprises a driving source and a planetary gear set arranged on the frame (3), the driving source is in transmission connection with an input wheel in the planetary gear set, and an output wheel in the planetary gear set is sleeved on a transmission rod (62).

10. The paper stop mechanism of claim 9, wherein: the driving source is a motor.

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