CN110861416B

CN110861416B - Paper blocking mechanism of printer

Info

Publication number: CN110861416B
Application number: CN201911256655.4A
Authority: CN
Inventors: 陈董事; 李川
Original assignee: Ningbo Deli Kebei Technology Co Ltd
Current assignee: Ningbo Deli Kebei Technology Co Ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2024-07-30
Anticipated expiration: 2039-12-06
Also published as: CN110861416A

Abstract

The invention relates to a paper blocking mechanism of a printer, which comprises a blocking strip arm, a blocking strip connected to the blocking strip arm and a driving mechanism connected with the blocking strip arm, wherein the driving mechanism comprises a driving source, a driving rod assembly and a transmission assembly connected between an output shaft of the driving source and the driving rod assembly in a transmission way, the driving rod assembly comprises a driving rod, a sliding block and an elastic piece, a first end of the driving rod is rotationally connected with the blocking strip arm, the sliding block is elastically connected to a second end of the driving rod through the elastic piece, and the sliding block is eccentrically and rotationally connected to an output end of the transmission assembly. According to the paper blocking mechanism of the printer, on the basis of increasing the swing angle range of the blocking strip, paper blocking work can be normally completed under the condition of placing different paper amounts, so that the occurrence probability of paper rubbing and re-feeding phenomena caused by irregular paper placement or paper sliding during the last printing is reduced, the waste of paper is reduced, and the customer satisfaction is improved.

Description

Paper blocking mechanism of printer

Technical Field

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

Background

In some printers, under occasional situations, adjacent paper stacks below the printers are driven to slide inwards along with the rubbing of the paper, particularly, the situation that the paper with poor bending resistance slides downwards under the influence of factors such as dead weight is more serious for the printers with the paper needing to be obliquely placed, for example, the paper sheet alignment device of China patent publication No. CN1107014C (patent No. 99802916.5) is disclosed, the printer is disclosed, the paper placed in the printer is obliquely placed, and the paper is easy to slide downwards in the paper feeding process. Therefore, in order to avoid the influence of paper sliding on normal paper feeding, the paper blocking mechanism needs to be used for blocking paper before paper is rubbed, and a blocking strip in the paper blocking mechanism needs to return to the lowest point after paper is completely rubbed, so that the paper rubbing action is prevented. When the paper enters the printing stage, the barrier strip returns to the maximum paper-placing position until the next printing starts to repeat the above actions.

Chinese patent application publication No. CN109715537a (application No. 201780054280.6) & lt & gt, "paper feeding apparatus, paper processing apparatus using the same, and image forming apparatus", in which an alignment member is coupled to a pivot shaft, and a lever is provided on one end of the pivot shaft. The lever may be fixed to the pivot shaft, and the cam gear may include a gear portion and a cam portion to switch the alignment member between the alignment position and the conveyance-allowing position according to a rotational phase of the cam gear. The gear portion is partially provided with a toothless portion. The cam portion has a cam profile for switching the alignment member between the alignment position and the conveyance-permitting position. The cam portion is connected to the lever. The cam portion may 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 pivot to the conveyance-permitting position. However, in this structure, since the length of the lever is fixed, the pivot shaft is limited in rotation angle, and the aligning member cannot be driven to pivot to the conveyance-permitting position, which is required to be accomplished by means of an additional component. In addition, when such a structure is applied to a printer in which sheets are placed obliquely, when a large number of sheets or very few sheets are placed, the alignment member also suffers from a problem of seizing or failing to swing to a position to align a small number of sheets due to a limited swing angle.

Disclosure of Invention

The invention aims to solve the technical problem of providing the paper blocking mechanism of the printer, which can enlarge the swinging angle range of the blocking strip, can realize the folding and alignment of paper when the minimum paper quantity is placed, and can normally finish paper blocking work to align the paper when different paper quantities are placed.

The invention solves the problems by adopting the following technical scheme: the utility model provides a paper blocking mechanism of printer, includes the shelves strip arm, connects the blend stop on the shelves strip arm and the actuating mechanism who is connected with the shelves strip arm, actuating mechanism includes actuating source, actuating lever subassembly, transmission connection at the output shaft of actuating source and the drive lever subassembly between, its characterized in that: the driving rod assembly comprises a driving rod, a sliding block and an elastic piece, wherein the first end of the driving rod is rotationally connected with the stop bar arm, the sliding block is elastically connected with the second end of the driving rod through the elastic piece, and the sliding block is eccentrically rotationally connected with the output end of the transmission assembly.

In order to conveniently drive the stop bar arm to rotate and further drive the stop bar to swing along the circumferential direction, the end part of the stop bar arm is provided with a connecting part extending along the radial direction, and the driving rod is rotationally connected with the outer end of the connecting part.

The structure is simple, the outer end of connecting portion is provided with the connecting axle along the direction of perpendicular to actuating lever surface, the first end of actuating lever is provided with the connector, the connector rotates the cover and establishes on the connecting axle.

In order to facilitate installation and improve the convenience of installation, the connector is an arc-shaped piece with a central angle larger than 180 degrees.

The structure is simple, a sliding groove is axially formed in the driving rod, the sliding block is slidably mounted in the sliding groove, and the elastic piece is arranged between the sliding block and the end part of the sliding groove.

Preferably, a limiting piece capable of limiting the sliding area of the sliding block is arranged on the driving rod.

In order to conveniently limit the installation position of the elastic piece, a first limiting rod is arranged on the sliding block, a second limiting rod is arranged on the end face of the end part of the sliding groove, and two ends of the elastic piece are respectively sleeved outside the first limiting rod and the second limiting rod.

In order to conveniently realize the connection between the transmission assembly and the sliding block, the transmission assembly comprises a driving wheel connected to the output end of the driving source, a planetary gear set meshed with the driving wheel and an output wheel meshed with the planetary gear set, and the sliding block is eccentrically and rotatably connected to the output wheel through an eccentric shaft.

Preferably, the output wheel has a toothed segment and a toothless segment thereon.

In order to match the rotation angle of the gear bar, the central angle corresponding to the toothed arc section is matched with the total rotation angle from the initial position to complete falling of the gear bar.

Compared with the prior art, the invention has the advantages that: according to the paper blocking mechanism of the printer, the driving rod assembly is arranged to be the driving rod, the sliding block and the elastic piece, the effective acting length between the driving rod and the sliding block can drive the blocking strip on the blocking strip arm to swing in a range between a position aligning at least paper and a position allowing the blocking strip to completely fall down to transmit the paper under the action of the transmission assembly in a state that the elastic piece is not compressed, and when different numbers of paper are placed so that the blocking strip cannot swing to the position aligning at least paper, the sliding block can compress the spring to move relative to the driving rod under the driving of the transmission assembly, so that the transmission assembly can normally operate. In summary, the paper blocking mechanism of the printer can normally complete paper blocking work under the condition of placing different paper amounts on the basis of increasing the swing angle range of the barrier strip, so that the occurrence probability of paper rubbing and re-feeding phenomena caused by nonstandard paper placement or paper sliding during the last printing is reduced, the waste of paper is reduced, and the customer satisfaction is improved.

Drawings

Fig. 1 is a perspective view of a paper blocking mechanism of a printer according to an embodiment of the present invention.

Fig. 2 is a perspective view of the other view of fig. 1.

Fig. 3 is a schematic diagram of a motion trace of a paper blocking mechanism of a printer according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1 and 2, the paper stopper mechanism, the stopper arm 1, the stopper 2, and the driving mechanism of the printer in the present embodiment.

Wherein the stop bar arm 1 is rotatably mounted in the housing of the printer, and the stop bar 2 is connected to the stop bar arm 1 for aligning sheets of paper placed in the printer. The barrier strips 2 can be arranged in a plurality according to the requirement, each barrier strip 2 is connected to the barrier strip arm 1 at intervals, and then the barrier strips 2 can swing along with the rotation of the barrier strip arm 1, so that the paper blocking work is realized, the paper is aligned, and the paper is allowed to pass through to perform the printing work.

The driving mechanism in this embodiment is in transmission connection with the bar arm 1, and is further used for driving the bar arm 1 to rotate, and the driving mechanism includes a driving source, a driving rod assembly 3, and a transmission assembly 4 in transmission connection between an output shaft of the driving source and the driving rod assembly 3, where the driving source in this embodiment adopts a motor.

The transmission assembly 4 comprises a driving wheel 42, a planetary gear set 43 and an output wheel 41, wherein the driving wheel 42 is connected to an output shaft of the motor. An eccentric shaft 411 is eccentrically arranged on the output wheel 41 relative to the center of the output wheel 41 to facilitate eccentric rotational connection with the drive rod assembly 3. The output wheel 41 has a toothed segment 412 and a non-toothed segment 413 thereon. The corresponding central angle of the toothed segment 412 matches the total angle of rotation of the barrier rib 2 from the initial position to full collapse. The total rotation angle of the barrier rib 2 from the initial position to the fully fallen position is the rotation angle of the barrier rib 2 from the initial position to the minimum aligned paper position plus the rotation angle of the barrier rib 2 from the minimum aligned paper position to the fully fallen position to allow the paper to pass.

The planetary gear set 43 is engaged and connected between the driving wheel 42 and the output wheel 41, and different gears in the planetary gear set 43 and the output wheel 41 are engaged and driven along with the forward and reverse rotation of the motor, so that the output wheel 41 can be driven to forward and reverse rotation through interaction among the driving wheel 42, the planetary gear set 43 and the output wheel 41, and further the bar arm 1 is driven.

The driving rod assembly 3 is connected between the output wheel 41 and the bar arm 1, and the driving rod assembly 3 includes a driving rod 31, a slider 32, and an elastic member 33. The sliding block 32 is rotatably sleeved on the eccentric shaft 411, and further, the sliding block is in eccentric rotation connection with the output wheel 41.

The first end of the driving rod 31 is provided with a connector 311, the end part of the stop bar arm 1 is provided with a connecting part 11 extending along the radial direction, the outer end of the connecting part 11 is provided with a connecting shaft 111, and the connector 311 is rotatably sleeved on the connecting shaft 111. The rotary connection between the drive rod assembly 3 and the bar arm 1 is thus achieved by the cooperation of the connecting part 11 and the connecting head 311. The connector 311 in this embodiment is an arc-shaped member with a central angle greater than 180 °, that is, the connector 311 has a notch, and preferably, the width of the notch is slightly smaller than the diameter of the connecting shaft 111, so that when the connector is installed, the notch of the connector 311 can adapt to the tiny deformation of the connector 311 when the connector 311 is installed on the connecting shaft 111, and the structure of the connector 311 makes the connection between the driving rod assembly 3 and the stop arm 1 more convenient, and ensures the reliability of connection.

The driving rod 31 is internally provided with a sliding groove 312 along the axial direction, the sliding block 32 is limited in the sliding groove 312 in a sliding way, the elastic piece 33 is arranged in the sliding groove 312 and positioned between the sliding block 32 and the end part of the sliding groove 312, and the sliding block 32 is positioned at the second end of the driving rod 31 so as to be sleeved on the eccentric shaft 411 with rotation, and further realize eccentric rotation connection with the output wheel 41.

In order to ensure the smoothness of sliding and the reliability of sliding of the slider 33 within the slide groove 312, the slide groove 312 in this embodiment is a through hole penetrating radially along the driving rod 31, and the slide groove 312 is provided facing the second end opening of the driving rod 31, such that the end of the slider 33 is rotatably connected with the eccentric shaft 411, thereby reducing the installation space in width. The slider 32 is placed in the through-hole-shaped slide groove 312 and rides on the drive rod 31, so that it can slide along the axial direction of the drive rod 31. In addition, in order to avoid the influence of the excessive sliding range of the sliding block on the normal use, a limiting piece 313 capable of limiting the sliding area of the sliding block 33 is further arranged on the driving rod 31, specifically, two ends of the driving rod 31 corresponding to the sliding area of the sliding block 32 are respectively provided with the limiting piece 313 extending outwards. The elastic member 33 is also disposed in the sliding slot 312, and one end of the elastic member 33 abuts against the end surface of the sliding block 32, and the other end abuts against the inner end surface of the sliding slot 312 at the second end of the limiting rod 31. In order to ensure the connection firmness of the elastic member 33 between the sliding block 32 and the driving rod 31, the sliding block 32 is provided with a first limiting rod 321, the end face of the end part of the sliding groove 312 is provided with a second limiting rod 3121, two ends of the elastic member 33 are respectively sleeved outside the first limiting rod 321 and the second limiting rod 3121, and the elastic member 33 is in a release state in a normal state. In this embodiment, the force that causes the elastic member 33 to undergo compression deformation is relatively large, that is, under the action of no large external force, the position between the slider 32 and the driving rod 31 is relatively fixed, that is, when the barrier rib arm 1 is under the action of the external force of the non-paper blocking mechanism, the situation that the elastic member 33 is compressed between the slider 32 and the driving rod 31 during the swinging action of the barrier rib 2 does not occur.

The working process of the paper blocking mechanism of the printer in the embodiment is as follows: as shown in fig. 3, the initial position of the barrier rib 2 is the position where the barrier rib 2 aligns with the paper when the standard full-amount number of paper is placed in the printer, so as to ensure that the user barrier rib can adapt to the placement of different paper numbers of users without interference. After the printer receives a printing instruction, the motor is controlled to work, the driving wheel 42 is driven to rotate, the planetary gear set 43 is driven to rotate, the wheel G1 in the planetary gear set 43 is meshed with the output wheel 41 and drives the output wheel 41 to rotate, the driving rod 31 is driven to move along with the rotation of the output wheel 41, the driving rod assembly 3 drives the barrier strip 2 to swing towards the direction of aligning paper, if only one piece of paper is used in the printer at the moment, the driving rod 31 and the sliding block 32 in the driving rod assembly synchronously move, and the barrier strip 2 is driven to swing gradually to the position of aligning the least amount of paper, and a small amount of paper placed in the printer is furled and aligned. If more paper is placed in the printer at this time, when the driving rod assembly 3 drives the barrier rib 2 to swing to a position aligned with the existing amount of paper, the barrier rib 2 cannot swing any more, at this time, under the action of the output wheel 41, the eccentric shaft 411 drives the sliding block 32 to move axially relative to the driving rod 31, so as to compress the elastic member 33, thereby avoiding the situation that the output wheel 41 cannot rotate. As the motor continues to rotate, the output wheel 41 is driven to continue to rotate, and the eccentric shaft 411 drives the barrier strip 2 to swing in a direction allowing the paper to pass through. If more sheets are placed in the printer, the compressed elastic member 33 is also gradually released during the continued rotation of the motor. So that the eccentric shaft 411 gradually drives the barrier strip 2 to fall completely and can drive paper to pass through. Then, the printer will perform a paper rubbing operation, and during the paper rubbing operation, the planetary gear set 43 just goes to the toothless arc section 413 of the output wheel 41, even if the planetary gear set 43 rotates under the drive of the motor, the planetary gear set 43 will not drive the output wheel 41 to rotate, so that the barrier strip 2 is guaranteed to be in a completely fallen state, and the advance of paper is not affected. After paper rubbing is completed, when the printer performs image printing, the motor is controlled to rotate reversely, the driving wheel 42 is driven to rotate reversely, at the moment, the other wheel G2 in the planetary gear set 43 is meshed with the output wheel 41, the output wheel 41 is driven to rotate reversely, the barrier rib arm 1 is driven to rotate, and the barrier rib 2 is gradually reset to the initial position. And repeating the steps to realize paper feeding of the printer. In the whole working process, the driving source, the transmission component 4 and the driving rod component 3 are stable in transmission, large and stable force can be output when the paper is aligned and pressed, the barrier strip 2 can be driven to swing at a large angle, and the normal operation of the printer can be guaranteed when different numbers of paper are placed in the printer. Therefore, the probability of paper rubbing and re-feeding caused by irregular paper placement or sliding of the paper head during the last printing is reduced, the waste of paper is reduced, and the customer satisfaction is improved.

Claims

1. The utility model provides a paper blocking mechanism of printer, includes shelves strip arm (1), connects blend stop (2) on shelves strip arm (1) and the actuating mechanism who is connected with shelves strip arm (1), actuating mechanism includes actuating source, actuating lever subassembly (3), transmission connection drive assembly (4) between actuating source's output shaft and actuating lever subassembly (3), its characterized in that: the driving rod assembly (3) comprises a driving rod (31), a sliding block (32) and an elastic piece (33), wherein the first end of the driving rod (31) is rotationally connected with the stop bar arm (1), the sliding block (32) is elastically connected with the second end of the driving rod (31) through the elastic piece (33), and the sliding block (32) is eccentrically rotationally connected with the output end of the transmission assembly (4).

2. The paper stop mechanism of the printer according to claim 1, wherein: the end part of the stop bar arm (1) is provided with a connecting part (11) extending along the radial direction, and the driving rod (31) is rotationally connected with the outer end of the connecting part (11).

3. The paper stop mechanism of the printer according to claim 2, wherein: the connecting part (11) is provided with a connecting shaft (111), a first end of the driving rod (31) is provided with a connector (311), and the connector (311) is rotatably sleeved on the connecting shaft (111).

4. A paper stop mechanism for a printer according to claim 3, wherein: the connector (311) is an arc-shaped piece with a central angle larger than 180 degrees.

5. A paper stop mechanism for a printer according to any one of claims 1 to 4, wherein: a sliding groove (312) is formed in the driving rod (31) along the axial direction, the sliding block (32) is slidably mounted in the sliding groove (312), and the elastic piece (33) is arranged between the sliding block (32) and the end portion of the sliding groove (312).

6. The paper stop mechanism of the printer according to claim 5, wherein: the driving rod (31) is provided with a limiting piece (313) which can limit the sliding area of the sliding block (32).

7. The paper stop mechanism of the printer according to claim 5, wherein: the sliding block (32) is provided with a first limiting rod (321), the end face of the end part of the sliding groove (312) is provided with a second limiting rod (3121), and two ends of the elastic piece (33) are respectively sleeved outside the first limiting rod (321) and the second limiting rod (3121).

8. A paper stop mechanism for a printer according to any one of claims 1 to 4, wherein: the transmission assembly (4) comprises a driving wheel (42) connected to the output end of the driving source, a planetary gear set (43) meshed with the driving wheel (42) and an output wheel (41) meshed with the planetary gear set (43), and the sliding block (32) is eccentrically and rotatably connected to the output wheel (41) through an eccentric shaft (411).

9. The paper stop mechanism of the printer according to claim 8, wherein: the output wheel (41) is provided with a toothed arc section (412) and a toothless arc section (413).

10. The paper stop mechanism of the printer according to claim 9, wherein: the central angle corresponding to the toothed arc section (412) is matched with the total rotation angle of the stop bar (2) from the initial position to complete falling.