CN111483238A

CN111483238A - Double-path paper supply device and receipt printing equipment

Info

Publication number: CN111483238A
Application number: CN202010246614.3A
Authority: CN
Inventors: 邓胜江; 姜利; 戴建强; 梁帅; 万国睿; 张兆龙; 贾振兴; 刘伟; 冯子豪; 李阳; 王然然; 付志霞; 李佳鹏; 逄礡; 王明哲
Original assignee: China Academy of Railway Sciences Corp Ltd CARS; Institute of Computing Technologies of CARS; Beijing Jingwei Information Technology Co Ltd
Current assignee: China Academy of Railway Sciences Corp Ltd CARS; Institute of Computing Technologies of CARS; Beijing Jingwei Information Technology Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-08-04

Abstract

The invention relates to the technical field of printing equipment, in particular to a double-path paper supply device and receipt printing equipment. The double-path paper supply device comprises an upper paper supply mechanism, a lower paper supply mechanism and a base, wherein the upper paper supply mechanism comprises an upper paper supply part, the lower paper supply mechanism comprises a lower paper supply part, the upper paper supply part, the lower paper supply part and the base are sequentially arranged from top to bottom, an upper paper supply channel is formed between the upper paper supply part and the lower paper supply part, and a lower paper supply channel is formed between the lower paper supply part and the base. The two-way paper supply device provided by the invention can respectively transmit the receipt paper through the upper paper supply channel and the lower paper supply channel, thereby effectively solving the problem that the receipt paper needs to be frequently replaced in the prior art, ensuring that the use time is longer after one-time paper roll replacement, and being convenient for operation and maintenance.

Description

Double-path paper supply device and receipt printing equipment

Technical Field

The invention relates to the technical field of printing equipment, in particular to a double-path paper supply device and receipt printing equipment.

Background

With the development of electronic tickets, the electronization of the tickets becomes a development trend in the future, and the demand of paper vouchers is greatly increased along with the electronization of the tickets. At present, the evidence printing equipment on the market mainly adopts a printing device with single-path paper supply, and the printing device with the single-path paper supply needs to frequently replace paper rolls, so that the operation and the maintenance are inconvenient.

Disclosure of Invention

Technical problem to be solved

The invention aims to provide a double-path paper supply device and receipt printing equipment, which solve the problem that the conventional receipt printing equipment adopts a single-path paper supply device to cause frequent replacement of paper rolls.

(II) technical scheme

In order to solve the technical problem, the invention provides a two-way paper supply device which comprises an upper paper supply mechanism, a lower paper supply mechanism and a base, wherein the upper paper supply mechanism comprises an upper paper supply part, the lower paper supply mechanism comprises a lower paper supply part, the upper paper supply part, the lower paper supply part and the base are sequentially arranged from top to bottom, an upper paper supply channel is formed between the upper paper supply part and the lower paper supply part, and a lower paper supply channel is formed between the lower paper supply part and the base.

Furthermore, the paper feeding mechanism further comprises a first driving paper guide rubber roller, a first driven synchronous pulley, a first driven wheel, a first synchronous belt, a second synchronous belt and a first motor, wherein a power output end of the first motor is connected with the first driven wheel through the first synchronous belt, the first driven wheel is connected with the first driven synchronous pulley through the second synchronous belt, the first driven synchronous pulley is connected with one end of the first driving paper guide rubber roller, and the first driven rubber roller is in corresponding rolling contact with the first driving paper guide rubber roller in the paper feeding channel.

Further, the lower paper feeding mechanism further comprises a second driving paper guide rubber roller, a second driven wheel, a second motor and a third synchronous belt, a power output shaft of the second motor is connected with the second driven wheel through the third synchronous belt, the second driven wheel is connected with one end of the second driving paper guide rubber roller, and the second driving paper guide rubber roller and the second driven rubber roller are in corresponding rolling contact in the lower paper feeding channel.

Specifically, the first driven rubber roller comprises a first driven roller shaft and a first driven roller body arranged on the first driven roller shaft, the first driven roller shaft is mounted on the upper paper feeding part, and a first opening mounting groove matched with the first driven roller body is formed in the lower surface of the upper paper feeding part; the first driving paper guide rubber roller comprises a first driving roller shaft and a first driving roller body arranged on the first driving roller shaft, the first driving roller shaft is installed on the lower paper supply part, and a second opening installation groove matched with the first driving roller body is formed in the upper surface of the lower paper supply part; the first driving roller body is in rolling contact with the first driven roller body correspondingly, and the cross section of the first driving roller body is in a preferred arc shape.

The second driven rubber roller comprises a second driven roller shaft and a second driven roller body arranged on the second driven roller shaft, the second driven roller shaft is mounted on the lower paper feeding part, and a third opening mounting groove matched with the second driven roller body is formed in the lower surface of the lower paper feeding part; the second driving paper guide rubber roller comprises a second driving roller shaft and a second driving roller body arranged on the second driving roller shaft, the second driving roller shaft is arranged on the base, and a fourth opening installation groove matched with the second driving roller body is formed in the upper surface of the base; the second driving roller body is in rolling contact with the second driven roller body correspondingly, and the cross section of the second driving roller body is in a preferred arc shape.

Further, a first reflective optical coupler and a second reflective optical coupler are arranged on the lower surface of the upper paper feeding portion, a first optical coupler reflecting plate and a second optical coupler reflecting plate are arranged on the upper surface of the lower paper feeding portion, the first reflective optical coupler corresponds to the first optical coupler reflecting plate, and the second reflective optical coupler corresponds to the second optical coupler reflecting plate.

Further, a third reflective optical coupler and a fourth reflective optical coupler are arranged on the lower surface of the lower paper feeding portion, a third optical coupler reflecting plate and a fourth optical coupler reflecting plate are arranged on the upper surface of the base, the third reflective optical coupler corresponds to the third optical coupler reflecting plate, and the fourth reflective optical coupler corresponds to the fourth optical coupler reflecting plate.

Further, the upper paper supply part and the lower paper supply part are connected through a first rotating shaft, the left side and the right side of the upper paper supply part are respectively provided with a first buckle and a first spring, the first buckles are rotatably installed on the upper paper supply part, one end of each first spring is connected with the upper paper supply part, the other end of each first spring is connected with the corresponding first buckle, the lower paper supply part is provided with first fixing pins in one-to-one correspondence with the corresponding first buckles, and the first buckles are assembled with the first fixing pins in a clamping manner.

Further, lower paper feeding portion with the base passes through the second pivot and connects, the left and right sides of lower paper feeding portion all is equipped with second buckle and second spring, the second buckle rotates to be installed in lower paper feeding portion, the one end of second spring with lower paper feeding portion is connected, the other end of second spring with the second buckle is connected, the base be equipped with the second fixed pin of second buckle one-to-one, the second buckle with second fixed pin snap-fit.

In order to solve the technical problem, the invention also provides receipt printing equipment which comprises the double-path paper supply device.

(III) advantageous effects

The technical scheme of the invention has the following advantages:

according to the double-path paper supply device provided by the invention, the upper paper supply part, the lower paper supply part and the base are sequentially arranged from top to bottom, so that an upper paper supply channel is formed between the upper paper supply part and the lower paper supply part, and a lower paper supply channel is formed between the lower paper supply part and the base. The receipt printing equipment provided by the invention adopts the double-path paper supply device, so that the service performance of the receipt printing equipment is effectively improved.

Drawings

FIG. 1 is a schematic view of a two-way paper feed apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a voucher printing apparatus according to an embodiment of the present invention;

fig. 3 is a schematic view of an open state of a two-way paper feeding device in a receipt printing apparatus according to an embodiment of the present invention.

In the figure:

100: a two-way paper supply device; 200: a print head; 300: a cutter mechanism; 400: a paper feeder;

1: an upper paper supply mechanism; 101: an upper paper feeding section; 102: a first active paper guide rubber roller; 103: a first driven rubber roller; 104: a first driven synchronous pulley; 105: a first driven wheel; 106: a first synchronization belt; 107: a second synchronous belt; 108: a first motor; 1011: a first reflective light coupler; 1012: a second reflective optical coupler;

2: a lower paper feeding mechanism; 201: a lower paper feeding section; 202: a second active paper guide rubber roller; 203: a second driven rubber roller; 204: a second driven wheel; 205: a second motor; 206: a third synchronous belt; 2011: a first optocoupler reflecting plate; 2012: a second optical coupling reflection plate; 2013: a third reflective optocoupler; 2014: a fourth reflective light coupler;

3: a base; 301: a third optocoupler reflecting plate; 302: a fourth optical coupling reflecting plate;

4: an upper paper feed passage; 5: a lower paper feed passage; 601: a first buckle; 602: a first spring; 603: a first fixing pin; 701: a second buckle; 702: a second spring; 703: a second fixing pin.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1, an embodiment of the present invention provides a two-way paper supply device, including an upper paper supply mechanism 1, a lower paper supply mechanism 2, and a base 3, where the upper paper supply mechanism 1 includes an upper paper supply portion 101, the lower paper supply mechanism 2 includes a lower paper supply portion 201, and the upper paper supply portion 101, the lower paper supply portion 201, and the base 3 are sequentially arranged from top to bottom. An upper paper feed path 4 is formed between the upper paper feed unit 101 and the lower paper feed unit 201, and a lower paper feed path 5 is formed between the lower paper feed unit 201 and the base 3.

Therefore, the two-way paper supply device provided by the embodiment of the invention can respectively transmit the receipt paper through the two paper supply channels, namely the upper paper supply channel 4 and the lower paper supply channel 5, thereby effectively solving the problem that the receipt paper needs to be frequently replaced when the existing single paper supply channel is used. By adopting the double-path paper supply device provided by the embodiment of the invention, after one-time paper roll is replaced, the service life is longer, and the operation and maintenance are convenient.

In a further embodiment of the present invention, the upper paper feeding mechanism 1 further includes a first driving paper guide rubber roller 102, a first driven rubber roller 103, a first driven synchronous pulley 104, a first driven pulley 105, a first synchronous belt 106, a second synchronous belt 107 and a first motor 108. The first driven rubber roller 103 is installed on the upper paper feeding part 101, the first driving paper guide rubber roller 102 is installed on the lower paper feeding part 201, and the first driven wheel 105 and the first motor 108 are respectively installed on the base 3.

The power output end of the first motor 108 is connected with the first driven wheel 105 through a first synchronous belt 106, the first driven wheel 105 is connected with the first driven synchronous pulley 104 through a second synchronous belt 107, the first driven synchronous pulley 104 is connected with one end of the first driving paper guide rubber roller 102, and the first driven rubber roller 103 and the first driving paper guide rubber roller 102 are in corresponding rolling contact in the upper paper feeding channel 4.

When the upper paper feeding mechanism 1 works, the first motor 108 drives the first driven wheel 105 to rotate through the first synchronous belt 106, the first driven wheel 105 drives the first driven synchronous belt wheel 104 to rotate through the second synchronous belt 107, the first driven synchronous belt wheel 104 can drive the first driving paper guide rubber roller 102 to rotate through rotation, and the first driving paper guide rubber roller 102 can drive the first driven rubber roller 103 to roll through rolling friction force. The first driving paper guide rubber roller 102 and the first driven rubber roller 103 realize the transmission of the slip paper in the upper paper feeding channel 4 by rubbing the slip paper.

Specifically, the first driven rubber roller 103 includes a first driven roller shaft and a first driven roller body disposed on the first driven roller shaft, the first driven roller shaft is mounted on the upper paper feeding portion 101, and a first opening mounting groove matched with the first driven roller body is disposed on the lower surface of the upper paper feeding portion 101. The first driving paper guide rubber roller 102 comprises a first driving roller shaft and a first driving roller body arranged on the first driving roller shaft, the first driving roller shaft is installed on the lower paper supply part 201, the first driven synchronous pulley 104 is installed at one end of the first driving roller shaft, and a second opening installation groove matched with the first driving roller body is formed in the upper surface of the lower paper supply part 201.

Wherein, first initiative roll body can correspond rolling contact with first driven roll body to realize the transmission to rely on strip paper through rolling friction rely on strip paper.

The cross section of the first driving roller body is in a shape of an excellent arc, intermittent rolling friction is formed between the outer peripheral surface of the excellent arc of the second driving roller body and the cylindrical surface of the first driven roller body, strip paper can be effectively transmitted through the intermittent rolling friction, and paper jam can be effectively prevented.

In a further embodiment of the present invention, the lower surface of the upper paper feeding portion 101 is provided with a first reflective optical coupler 1011 and a second reflective optical coupler 1012, and the upper surface of the lower paper feeding portion 201 is provided with a first optical coupler reflecting plate 2011 and a second optical coupler reflecting plate 2012.

The first reflective light coupler 1011 and the first optical coupler reflecting plate 2011 correspond to each other, and the first reflective light coupler 1011 and the first optical coupler reflecting plate 2011 are arranged in front of the first driven rubber roll 103 and used for judging the starting transmission position of the strip paper in the upper paper feeding channel 4.

The second reflective light coupler 1012 corresponds to the second optical coupler reflecting plate 2012, and the second reflective light coupler 1012 and the second optical coupler reflecting plate 2012 are disposed behind the first driven rubber covered roller 103 and are used for determining the cut-off position of the receipt paper in the upper paper feeding channel 4.

In a further embodiment of the present invention, the lower paper feeding mechanism 2 further includes a second driving paper guide rubber roller 202, a second driven rubber roller 203, a second driven wheel 204, a second motor 205 and a third synchronous belt 206, the second driven rubber roller 203 is installed in the lower paper feeding portion 201, and the second driving paper guide rubber roller 202 and the second motor 205 are respectively installed in the base 3.

The power output shaft of the second motor 205 is connected with the second driven wheel 204 through the third synchronous belt 206, the second driven wheel 204 is connected with one end of the second driving paper guide rubber roller 202, and the second driving paper guide rubber roller 202 and the second driven rubber roller 203 are in corresponding rolling contact in the lower paper feeding channel 5.

When the lower paper feeding mechanism 2 works, the second motor 205 drives the second driven wheel 204 to rotate through the third synchronous belt 206, the rotation of the second driven wheel 204 can drive the second driving paper guide rubber roller 202 to rotate, and the second driving paper guide rubber roller 202 can drive the second driven rubber roller 203 to roll through rolling friction force. The second driving paper guide rubber roller 202 and the second driven rubber roller 203 realize the transmission of the slip paper in the lower paper supply channel 5 by rubbing the slip paper.

Specifically, the second driven rubber roller 203 includes a second driven roller shaft and a second driven roller body disposed on the second driven roller shaft, the second driven roller shaft is mounted on the lower paper feeding portion 201, and a third opening mounting groove matched with the second driven roller body is disposed on the lower surface of the lower paper feeding portion 201. The second driving paper guide rubber roller 202 comprises a second driving roller shaft and a second driving roller body arranged on the second driving roller shaft, the second driving roller shaft is installed on the base 3, the second driven wheel 204 is installed at one end of the second driving roller shaft, and a fourth opening installation groove matched with the second driving roller body is formed in the upper surface of the base 3.

Wherein, the second initiative roll body corresponds rolling contact with the driven roll body of second to realize the transmission to the receipt paper through rolling friction receipt paper.

The cross section of the second driving roller body is in a shape of an excellent arc, intermittent rolling friction is formed between the outer peripheral surface of the excellent arc of the second driving roller body and the cylindrical surface of the second driven roller body, strip paper can be effectively transmitted through the intermittent rolling friction, and paper jam can be effectively prevented.

In a further embodiment of the present invention, the lower surface of the lower paper feeding section 201 is provided with a third reflective optical coupler 2013 and a fourth reflective optical coupler 2014, and the upper surface of the chassis 3 is provided with a third optical coupler reflecting plate 301 and a fourth optical coupler reflecting plate 302.

The third reflective optocoupler 2013 corresponds to the third optocoupler reflecting plate 301, and the third reflective optocoupler 2013 and the third optocoupler reflecting plate 301 are arranged in front of the second driven rubber roll 203 and used for judging the starting transmission position of the strip paper in the lower paper feeding channel 5.

The fourth reflective light coupler 2014 corresponds to the fourth optical coupler reflector 302, and the fourth reflective light coupler 2014 and the fourth optical coupler reflector 302 are arranged behind the second driven rubber roller 203 and used for judging the cut-off position of the receipt paper in the lower paper feeding channel 5.

In a further embodiment of the present invention, the upper paper feeding portion 101 and the lower paper feeding portion 201 are connected by a first pivot shaft so that the upper paper feeding portion 101 can be reversed with respect to the lower paper feeding portion 201.

First buckles 601 and first springs 602 are arranged on the left side and the right side of upper paper feeding portion 101, first buckles 601 are rotatably mounted on upper paper feeding portion 101, first buckles 601 can rotate relative to upper paper feeding portion 101, and first buckles 601 are provided with bayonets. One end of the first spring 602 is connected to the upper paper feeding unit 101, and the other end of the first spring 602 is connected to the first catch 601, and the first spring 602 can be driven to extend and contract by the rotation of the first catch 601. The lower paper feeding unit 201 is provided with first fixing pins 603 corresponding to the first catches 601 one by one, and the catches of the first catches 601 can be engaged with the first fixing pins 603.

In the closed state of the upper paper feeding unit 101 and the lower paper feeding unit 201, the first catch 601 is engaged and fixed to the first fixing pin 603. When the upper paper feeding unit 101 and the lower paper feeding unit 201 need to be opened, the first catch 601 is pressed counterclockwise to disengage the bayonet of the first catch 601 from the first fixing pin 603, and then the upper paper feeding unit 101 is turned over from the lower paper feeding unit 201 to be opened. When the first latch 601 is released from being pressed, the first latch 601 can be restored to the original position by the elastic force of the first spring 602. Through the arrangement of the matching structure of the first buckle 601, the first spring 602 and the first fixing pin 603, the opening and closing operation between the upper paper feeding part 101 and the lower paper feeding part 201 is facilitated, and further the maintenance of the upper paper feeding part 101 and the lower paper feeding part 201 is facilitated.

Further, in order to facilitate the rotational pressing operation of the first catch 601, an upper operation wrench may be mounted on the first catch 601.

In a further embodiment of the present invention, the lower paper feeding portion 201 and the base 3 are connected by a second rotating shaft so that the lower paper feeding portion 201 can be reversed with respect to the base 3.

The left side and the right side of the lower paper feeding portion 201 are both provided with a second buckle 701 and a second spring 702, the second buckle 701 is rotatably installed on the lower paper feeding portion 201, the second buckle 701 can rotate relative to the lower paper feeding portion 201, and the second buckle 701 is provided with a bayonet. One end of the second spring 702 is connected to the lower paper feeding unit 201, and the other end of the second spring 702 is connected to the second catch 701, and the second spring 702 can be driven to extend and contract by the rotation of the second catch 701. The base 3 is provided with second fixing pins 703 corresponding to the second fasteners 701 one by one, and bayonets of the second fasteners 701 can be engaged with the second fixing pins 703.

When the lower paper feeding unit 201 and the base 3 are in the closed state, the second catch 701 of the lower paper feeding unit 201 is engaged with and fixed to the second fixing pin 703. When the lower paper feeding unit 201 and the base 3 need to be opened, the second buckle 701 is pressed counterclockwise, the bayonet of the second buckle 701 is disengaged from the second fixing pin 703, and then the lower paper feeding unit 201 is turned over and opened from the base 3. When the second latch 701 is released from being pressed, the second latch 701 can return to the original position by the elastic force of the second spring 702. Through the matching structure of the second buckle 701, the second spring 702 and the second fixing pin 703, the opening and closing operation between the lower paper feeding portion 201 and the base 3 is conveniently realized, and further the maintenance of the lower paper feeding portion 201 and the base 3 is convenient.

Further, in order to facilitate the rotational pressing operation of the second catch 701, a lower operation wrench may be mounted on the second catch 701.

As shown in fig. 2 and 3, an embodiment of the present invention further provides a receipt printing apparatus including the two-way paper feeding device 100 of the above-described embodiment.

Further, the receipt printing apparatus includes a print head 200, a cutter mechanism 300 and a paper feeder 400, and the receipt can be transported in sequence by the two-way paper supply device 100, the print head 200, the cutter mechanism 300 and the paper feeder 400. The two-way paper supply device 100 is configured to supply the printing head 200 with the slip paper, print the slip paper by the printing head 200, and then cut the printed slip paper by the cutter mechanism 300, where the cut slip paper can be buffered and output by the paper feeder 400.

Therefore, the receipt printing device according to the embodiment of the invention can transmit the receipt paper through the two paper supply channels by using the two-way paper supply device 100 of the above embodiment, so that the printing device does not need to frequently replace the paper roll, the use time after the paper roll is replaced once is longer, the operation and maintenance are convenient, and the use performance of the receipt printing device is effectively improved.

In conclusion, the two-way paper supply device provided by the embodiment of the invention can provide the upper paper supply channel and the lower paper supply channel to transmit the receipt paper, effectively solves the problem of frequent replacement of the receipt paper, enables the use time to be longer after the paper roll is replaced once, and is convenient to operate and maintain.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A two-way paper feeding device characterized in that: the upper paper feeding mechanism comprises an upper paper feeding part, the lower paper feeding mechanism and a base, the lower paper feeding mechanism comprises a lower paper feeding part, the upper paper feeding part, the lower paper feeding part and the base are sequentially arranged from top to bottom, an upper paper feeding channel is formed between the upper paper feeding part and the lower paper feeding part, and a lower paper feeding channel is formed between the lower paper feeding part and the base.

2. The two-way paper feeding apparatus of claim 1, wherein: the paper feeding mechanism further comprises a first driving paper guide rubber roller, a first driven synchronous belt wheel, a first driven wheel, a first synchronous belt, a second synchronous belt and a first motor, wherein the power output end of the first motor is connected with the first driven wheel through the first synchronous belt, the first driven wheel is connected with the first driven synchronous belt wheel through the second synchronous belt, the first driven synchronous belt wheel is connected with one end of the first driving paper guide rubber roller, and the first driven rubber roller is in corresponding rolling contact with the first driving paper guide rubber roller in the paper feeding channel.

3. The two-way paper feeding apparatus of claim 1, wherein: the lower paper feeding mechanism further comprises a second driving paper guide rubber roller, a second driven wheel, a second motor and a third synchronous belt, a power output shaft of the second motor is connected with the second driven wheel through the third synchronous belt, the second driven wheel is connected with one end of the second driving paper guide rubber roller, and the second driving paper guide rubber roller is in corresponding rolling contact with the second driven rubber roller in the lower paper feeding channel.

4. The two-way paper feeding apparatus of claim 2, wherein: the first driven rubber roller comprises a first driven roller shaft and a first driven roller body arranged on the first driven roller shaft, the first driven roller shaft is mounted on the upper paper feeding part, and a first opening mounting groove matched with the first driven roller body is formed in the lower surface of the upper paper feeding part; the first driving paper guide rubber roller comprises a first driving roller shaft and a first driving roller body arranged on the first driving roller shaft, the first driving roller shaft is installed on the lower paper supply part, and a second opening installation groove matched with the first driving roller body is formed in the upper surface of the lower paper supply part; the first driving roller body is in rolling contact with the first driven roller body correspondingly, and the cross section of the first driving roller body is in a preferred arc shape.

5. The two-way paper feeding apparatus of claim 3, wherein: the second driven rubber roller comprises a second driven roller shaft and a second driven roller body arranged on the second driven roller shaft, the second driven roller shaft is installed in the lower paper feeding part, and a third opening installation groove matched with the second driven roller body is formed in the lower surface of the lower paper feeding part; the second driving paper guide rubber roller comprises a second driving roller shaft and a second driving roller body arranged on the second driving roller shaft, the second driving roller shaft is arranged on the base, and a fourth opening installation groove matched with the second driving roller body is formed in the upper surface of the base; the second driving roller body is in rolling contact with the second driven roller body correspondingly, and the cross section of the second driving roller body is in a preferred arc shape.

6. The two-way paper feeding apparatus of claim 1, wherein: the lower surface of the upper paper feeding part is provided with a first reflective optical coupler and a second reflective optical coupler, the upper surface of the lower paper feeding part is provided with a first optical coupler reflecting plate and a second optical coupler reflecting plate, the first reflective optical coupler corresponds to the first optical coupler reflecting plate, and the second reflective optical coupler corresponds to the second optical coupler reflecting plate.

7. The two-way paper feeding apparatus of claim 1, wherein: the lower surface of the lower paper feeding part is provided with a third reflective optical coupler and a fourth reflective optical coupler, the upper surface of the base is provided with a third optical coupler reflecting plate and a fourth optical coupler reflecting plate, the third reflective optical coupler corresponds to the third optical coupler reflecting plate, and the fourth reflective optical coupler corresponds to the fourth optical coupler reflecting plate.

8. The two-way paper feeding apparatus of claim 1, wherein: the upper paper supply part and the lower paper supply part are connected through a first rotating shaft, the left side and the right side of the upper paper supply part are respectively provided with a first buckle and a first spring, the first buckles are rotatably installed on the upper paper supply part, one end of each first spring is connected with the upper paper supply part, the other end of each first spring is connected with the corresponding first buckle, the lower paper supply part is provided with first fixing pins in one-to-one correspondence with the corresponding first buckles, and the first buckles are assembled with the first fixing pins in a clamping manner.

9. The two-way paper feeding apparatus of claim 1, wherein: the lower paper supply part is connected with the base through a second rotating shaft, a second buckle and a second spring are arranged on the left side and the right side of the lower paper supply part, the second buckle is rotatably installed on the lower paper supply part, one end of the second spring is connected with the lower paper supply part, the other end of the second spring is connected with the second buckle, the base is provided with second fixing pins in one-to-one correspondence with the second buckle, and the second buckle is assembled with the second fixing pins in a clamping mode.

10. A credential printing device, characterized by: comprising a two-way paper supply device according to any of claims 1-9.