阅读说明：本技术 一种打印机的挡纸机构 (Paper blocking mechanism of printer ) 是由 陈董事 李川 于 2019-12-06 设计创作，主要内容包括：本发明涉及一种打印机的挡纸机构,包括档条臂、连接在档条臂上的挡条以及与档条臂相连接的驱动机构,驱动机构包括驱动源、驱动杆组件、传动连接在驱动源的输出轴与驱动杆组件之间的传动组件,驱动杆组件包括驱动杆、滑块以及弹性件,所述驱动杆的第一端与档条臂转动连接,所述滑块通过弹性件弹性连接在驱动杆的第二端,并且滑块偏心转动连接在传动组件的输出端。该打印机的挡纸机构在增大挡条摆动角度范围的基础上,在放置不同纸量的情况下均能正常完成挡纸工作,如此减少了由于纸张摆放不规范或者上次打印时纸张滑动而造成搓纸重送现象的发生概率,减少纸张的浪费,提升了顾客满意度。(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 in transmission connection between an output shaft of the driving source and the driving rod assembly, the driving rod assembly comprises a driving rod, a sliding block and an elastic piece, the first end of the driving rod is in rotating connection with the blocking strip arm, the sliding block is elastically connected to the second end of the driving rod through the elastic piece, and the sliding block is eccentrically and rotatably connected to the output end of the transmission assembly. This paper blocking mechanism of printer on the basis of increase blend stop swing angle scope, the homoenergetic normally accomplishes the paper blocking work under the condition of placing different paper volumes, so reduced because the paper is put the emergence 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.)

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

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

3. The paper stop mechanism of a printer according to claim 2, wherein: connecting portion (11) are provided with connecting axle (111), the first end of actuating lever (31) is provided with connector (311), connector (311) rotate the cover and establish on connecting axle (111).

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

5. The paper stop mechanism of a printer according to any one of claims 1 to 4, wherein: a sliding groove (312) is axially arranged in the driving rod (31), 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 part of the sliding groove (312).

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

7. The paper stop mechanism of a printer according to claim 5, wherein: the sliding block (32) is provided with a first limiting rod (321), the end face of the end portion 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. The paper stop mechanism of 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 wheel set (43) meshed with the driving wheel (42) and an output wheel (41) meshed with the planetary wheel 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 a 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 a printer according to claim 9, wherein: the central angle corresponding to the toothed arc section (412) is matched with the total rotating angle of the barrier strip (2) from the initial position to the complete falling.

Technical Field

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

Background

The printer needs to twist paper in the first step before printing is started, and some printers can drive the adjacent paper stacks to slide inwards along with the twisting of the paper in occasional situations, and particularly for printers in which the paper needs to be obliquely placed, the situation that the paper with poor bending resistance slides downwards under the influence of factors such as dead weight is more serious, for example, in the chinese patent of invention document alignment device (No. 99802916.5) of the patent publication No. CN1107014C, the printer disclosed therein is one in which the paper placed is obliquely placed, and the paper is prone to slide downwards in the paper feeding process. Therefore, in order to avoid the influence of the paper slip on the normal paper feeding, the paper blocking mechanism needs to be used for performing the paper blocking operation before the paper is rubbed in, and after the paper blocking operation is completed, the blocking strip in the paper blocking mechanism needs to return to the lowest point, so that the paper rubbing operation is prevented from being hindered. When the paper enters the printing stage, the barrier strip returns to the maximum paper placing position again until the next printing is started and the actions are repeated.

Chinese patent application publication No. CN109715537A (application No. 201780054280.6) entitled sheet feeding apparatus, sheet processing apparatus using the same, and image forming apparatus, in which an alignment member is joinable to a pivot shaft, a lever being provided on one end of the pivot shaft. The lever may be fixed to the pivot shaft, and the cam gear may switch the alignment member between the alignment position and the transmission permission position according to a rotational phase of the cam gear, and the cam gear may include a gear portion and a cam portion. The gear portion is partially provided with a non-toothed 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 lever. The cam portion may contact the lever and pivot the pivot shaft to switch the alignment member to the alignment 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 transmission permitting position. However, in this structure, since the length of the rod is fixed, the rotation angle of the pivot shaft is limited, and the alignment member cannot be driven to pivot to the transmission-permitting position, which requires 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 has a problem that it is jammed or cannot be swung to a position where a small number of sheets are aligned due to a limited swing angle.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a paper blocking mechanism of a printer, which can increase the swing angle range of a blocking strip to achieve folding and aligning of paper when the minimum amount of paper is placed, and can normally complete paper blocking work to align paper when different amounts of paper are placed.

The technical scheme adopted by the invention for solving the problems is as follows: the utility model provides a paper blocking mechanism of printer, includes 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 the drive source, drive bar subassembly, the transmission is connected the transmission subassembly between the output shaft of drive source and drive bar subassembly, its characterized in that: the drive rod assembly comprises a drive rod, a sliding block and an elastic piece, the first end of the drive rod is in rotating connection with the stop bar arm, the sliding block is elastically connected to the second end of the drive rod through the elastic piece, and the sliding block is eccentrically and rotatably connected to the output end of the transmission assembly.

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

Simple structure ground, the outer end of connecting portion is provided with the connecting axle along the direction on 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 installation convenience, the connector is an arc-shaped part with a central angle larger than 180 degrees.

Simple structure ground, be provided with the spout along the axial in the actuating lever, slider slidable mounting is in the spout, the elastic component sets up between the tip of slider and spout.

Preferably, the driving rod is provided with a limiting member capable of limiting a sliding area of the slider.

In order to conveniently limit the installation position of the elastic part, a first limiting rod is arranged on the sliding block, a second limiting rod is arranged on the end face of the end portion of the sliding groove, and two ends of the elastic part 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 wheel set meshed with the driving wheel and an output wheel meshed with the planetary wheel 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 arc section and a non-toothed arc section.

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

Compared with the prior art, the invention has the advantages that: the paper blocking mechanism of the printer comprises a driving rod assembly, a sliding block and an elastic piece, wherein the driving rod assembly is provided with the driving rod, the sliding block and the elastic piece, under the uncompressed state of the elastic piece, the effective action length between the driving rod and the sliding block can drive a blocking strip on a blocking strip arm to swing within the range between the position of aligning the minimum paper and the position of allowing the paper to be driven when the blocking strip completely falls down under the action of a transmission assembly, and when different numbers of paper are placed so that the blocking strip cannot swing to the position of aligning the minimum paper, the sliding block can compress a spring to move relative to the driving rod under the drive of the transmission assembly, so that the transmission assembly can normally operate. To sum up, this printer keep off paper mechanism on the basis of increase blend stop swing angle scope, the homoenergetic normally accomplishes and keeps off paper work under the condition of placing different paper volumes, so reduced because the paper is put the emergence probability that paper slip caused the phenomenon of sending again of rubbing paper when nonstandard or printing last time, reduce the waste of paper, promoted customer satisfaction.

Drawings

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

Fig. 2 is a perspective view of fig. 1 from another perspective.

FIG. 3 is a schematic diagram of a movement track of a paper blocking mechanism of the printer according to the embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 and 2, the paper stop mechanism, the barrier arm 1, the barrier 2, and the drive mechanism of the printer in the present embodiment.

Wherein the stop strip arm 1 can be installed in the shell of the printer in a rotating limiting way, and the stop strip 2 is connected to the stop strip arm 1 and used for aligning paper placed in the printer. The barrier strips 2 can be arranged in a plurality of numbers as required, the barrier strips 2 are distributed and connected on 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 barrier bar arm 1, and is further used for driving the barrier bar arm 1 to rotate, 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, and the driving source in this embodiment adopts a motor.

The transmission assembly 4 comprises a driving wheel 42, a planetary wheel 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 provided on the output wheel 41 with respect to the center of the output wheel 41 to facilitate eccentric rotational coupling with the drive rod assembly 3. The output wheel 41 has a toothed arc section 412 and a non-toothed arc section 413. The central angle of the toothed arc section 412 matches the total angle of rotation of the stop bar 2 from the initial position to the fully inverted position. The total rotation angle of the barrier rib 2 from the initial position to the completely inverted position is the rotation angle of the barrier rib 2 from the initial position to the aligned minimum sheet position plus the rotation angle of the barrier rib 2 from the aligned minimum sheet position to the completely inverted position to allow the sheet 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 are engaged and driven with the output wheel 41 along with the positive and negative rotation of the motor, so that the output wheel 41 can be driven to rotate positively and negatively by the interaction among the driving wheel 42, the planetary gear set 43 and the output wheel 41, and the driving of the barrier arm 1 is further realized.

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

The first end of the driving rod 31 is provided with a connector 311, the end of the stop bar arm 1 is provided with a connecting portion 11 extending along the radial direction, the outer end of the connecting portion 11 is provided with a connecting shaft 111, and the connector 311 is rotatably sleeved on the connecting shaft 111. The rotation connection between the driving rod assembly 3 and the link arm 1 is realized by the cooperation of the connecting portion 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, 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 small deformation of the connector 311 when the connector 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 barrier bar arm 1 more convenient, and ensures the reliability of the connection.

The driving rod 31 is provided with a sliding groove 312 along the axial direction, the sliding block 32 is limited in the sliding groove 312 in a sliding manner, the elastic element 33 is arranged in the sliding groove 312 and located between the sliding block 32 and the end portion of the sliding groove 312, and the sliding block 32 is located at the second end of the driving rod 31 so as to be sleeved on the eccentric shaft 411 in a rotating manner, and further to be connected with the output wheel 41 in an eccentric rotating manner.

In order to ensure the smooth sliding and the reliable sliding of the sliding block 33 in the sliding slot 312, the sliding slot 312 in this embodiment is a through hole penetrating in the radial direction of the driving rod 31, and the sliding slot 312 is disposed facing the second end opening of the driving rod 31, so that the end of the sliding block 33 is rotatably connected to the eccentric shaft 411, thereby reducing the installation space in the width. The slider 32 is inserted into the through-hole-shaped slide groove 312 and is engaged with the driving rod 31 in a straddling manner, and can slide along the axial direction of the driving rod 31. In addition, in order to avoid the influence of the excessive sliding range of the slider on the normal use, the driving rod 31 is further provided with a limiting member 313 capable of limiting the sliding area of the slider 33, specifically, the driving rod 31 is provided with the limiting members 313 respectively extending outwards corresponding to the two ends of the sliding area of the slider 32, and since the slider 32 rides on the limiting rod 31, the end surface of the slider 32 can abut against the limiting member 313 in the sliding process, thereby limiting the sliding range of the slider 32 on the driving rod 31. 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 element 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 surface of the end portion of the sliding groove 312 is provided with a second limiting rod 3121, two ends of the elastic element 33 are respectively sleeved outside the first limiting rod 321 and the second limiting rod 3121, and the elastic element 33 is in a release state in a normal state. In this embodiment, the force for compressing and deforming the elastic member 33 is relatively large, that is, the position between the slider 32 and the driving rod 31 is relatively fixed without a large external force, that is, when the barrier strip arm 1 is under the external force action of the non-paper-blocking mechanism, the situation that the elastic member 33 is compressed between the slider 32 and the driving rod 31 does not occur during the swing action of the barrier strip 2.

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 bar 2 is the position of bar 2 in alignment with the sheets when a standard full amount of sheets are placed in the printer to ensure that the user bar can accommodate the placement of different amounts of sheets by the user without interference. After the printer receives a printing instruction, the motor is controlled to work, and then the driving wheel 42 is driven to rotate, and then the planetary wheel set 43 is driven to rotate, the wheel G1 in the planetary wheel set 43 is meshed with the output wheel 41 and drives the output wheel 41 to rotate, along with the rotation of the output wheel 41, the driving rod 31 is driven to move therewith, the driving rod assembly 3 drives the barrier strip 2 to swing towards the direction of aligning paper, if only one or two sheets of paper exist in the printer at the moment, the driving rod 31 and the sliding block 32 in the driving rod assembly synchronously move, and then the driving barrier strip 2 gradually swings to the position of aligning the minimum amount of paper, and then a small amount of paper placed in the printer is folded and aligned. And if the printer has placed the paper of more paper volume this moment in, when the drive lever assembly 3 drive blend stop 2 and swung to the position of the existing volume of paper of alignment, then blend stop 2 can't continue the swing again, at this moment, under the effect of output wheel 41, eccentric shaft 411 can drive slider 32 for drive lever 31 along axial motion, and then compress elastic component 33, avoided the unable pivoted condition of output wheel 41. With the continued rotation of the motor, the driving output wheel 41 continues to rotate, and the eccentric shaft 411 drives the barrier strip 2 to swing in the direction allowing the paper to pass through. If more paper is placed in the printer, the compressed resilient member 33 is also gradually released during the continued rotation of the motor. Thus, the eccentric shaft 411 gradually drives the barrier strip 2 to fall down completely to allow paper to pass through. Subsequently, the printer will carry out the paper twisting operation, and in the paper twisting operation, the planetary wheel set 43 just rotates to the toothless arc section 413 of the output wheel 41, even if the planetary wheel set 43 rotates under the driving of the motor, the output wheel 41 will not be driven to rotate, and the barrier 2 is ensured to be in the completely fallen state, so that the advance of the paper is not affected. After the paper twisting is finished, when the printer prints images, the motor is controlled to rotate reversely to drive the driving wheel 42 to turn over, and at the moment, the other wheel G2 in the planetary wheel set 43 is meshed with the output wheel 41 to drive the output wheel 41 to rotate reversely, so that the barrier strip arm 1 is driven to rotate, and the barrier strip 2 is gradually reset to the initial position. This operation is repeated to feed paper to the printer. In the whole working process, the driving source, the transmission assembly 4 and the driving rod assembly 3 are stably driven, large and stable force can be output when the paper is tightly pressed in an aligning mode, the barrier strips 2 can be driven to swing at large angles, and normal operation of the printer can be guaranteed when different amounts of paper are placed in the printer. Therefore, the probability of occurrence of the phenomenon of paper pickup and re-feeding caused by the sliding of the head of the paper when the paper is not placed in a standard mode or is printed last time is reduced, the waste of the paper is reduced, and the satisfaction degree of customers is improved.