CN113427917B - Printing device and paper discharge control module - Google Patents

Abstract

The invention provides a printing device and a paper discharge control module. The paper discharge roller module is close to the paper placing plate and can output paper. The paper discharging control module is connected with the paper discharging roller module and can control the paper discharging roller module to change into a release state so that paper passes through the paper discharging roller module and is positioned on the paper placing plate. Alternatively, the paper discharge roller module can be controlled to change to a paper discharge state to output paper.

Description

Printing device and paper discharge control module

technical field

The invention relates to a printing device, in particular to a printing device with special functions and a paper discharge control module.

Background technique

The printing device is a common computer peripheral device in the office, and its function is to print the required documents on paper. Printing devices include photocopiers, printers, and business machines integrating photocopiers, printers, and scanners, among which printers are the most commonly used.

Please refer to FIG. 1 , which is a schematic cross-sectional side view of a conventional printing device. The printing device 1 includes a printing device casing 10 , a paper tray 11 , a printing module 12 , a first paper feeding channel 13 , a plurality of first paper feeding roller sets 14 and a binding device 15 . The printing device casing 10 has an upper surface 101 and a paper outlet 102 , and the paper outlet 102 is exposed on the upper surface 101 . The paper tray 11 is disposed in the casing 10 of the printing device, and is capable of placing multiple sheets of paper P thereon. The first paper feeding channel 13 is disposed in the printing device casing 10 and between the paper tray 11 and the paper outlet 102 , and can allow multiple sheets of paper P to pass through. A plurality of first paper feeding roller sets 14 are respectively disposed on the first paper feeding channel 13 , and their function is to feed multiple sheets of paper P on the paper tray 11 to the paper outlet 102 . The printing module 12 is disposed on the first paper feeding path 13 , and its function is to print images on multiple sheets of paper P. The binding device 15 is arranged on the upper surface 101 of the printing device housing 10 and covers the paper outlet 102. The binding device 15 includes a binding module 151, a binding box 152, a second paper feeding channel 153 and a plurality of second paper feeding roller sets 154.

In the binding device 15 , the second paper feeding channel 153 is in contact with the paper outlet 102 on the printing device housing 10 , so that the second paper feeding channel 153 is connected with the first paper feeding channel 13 to allow multiple sheets of paper P to pass through. A plurality of second paper feeding roller sets 154 are disposed on the second paper feeding path 153 and function to feed multiple sheets of paper P from the first paper feeding path 13 to the binding box 152 . The function of the binding box 152 is to place multiple sheets of paper P, and the binding module 151 is located at one side of the binding box 152 for binding the multiple sheets of paper P on the binding box 152 . The printing device 1 with the binding device 15 can use the binding device 15 to perform binding operations on the multiple pages of paper P after the printing module 12 finishes printing, so that the user does not need to wait for the printing of the multiple pages of paper P to be manually bound, which not only saves Reduce the waiting time for printing, and save the manual binding action.

During the binding operation of multiple sheets of paper P by the binding device 15, the second paper feeding roller group 154 close to the binding box 152 must have a moving function. When the two rollers in the second paper feeding roller group 154 are separated, a The space is for the paper P to pass through, and the stapling operation can be performed. After the binding operation is completed, the two rollers in the second paper feeding roller set 154 close to the binding box 152 move to clamp the paper P, so as to feed the paper P away from the binding device 15 . Among them, the operation of the movement of the two rollers in the second paper feeding roller set 154 must use a stronger power element (such as a motor) to provide a stronger clamping force, otherwise the second paper feeding roller set 154 cannot be stabilized. If the paper P is clamped tightly, it will cause paper feeding failure.

Therefore, there is a need for a printing device that can avoid paper feeding failure.

Contents of the invention

The purpose of the present invention is to provide a printing device that can avoid paper feeding failure.

Another object of the present invention is to provide a paper discharge control module that can avoid paper feeding failure.

In a preferred embodiment, the present invention provides a printing device, which includes a paper placing board, a paper discharge roller module, and a paper discharge control module. The cardboard is used for placing at least one piece of paper. The paper discharge roller module is close to the paper setting plate and is used for outputting the at least one paper. The paper discharge control module is connected to the paper discharge roller module, and is used to control the paper discharge roller module to change to a released state, so that the at least one paper passes through the paper discharge roller module and is located on the paper plate, or controls the discharge The paper roller module changes to a paper discharge state, and outputs the at least one paper.

In a preferred embodiment, the paper discharge roller module includes a first roller set, a second roller set, a first gear set and a first power element. The first roller set is connected to the paper discharge control module, and the second roller set is located on one side of the first roller set and connected to the paper discharge control module. The first gear set is respectively connected to the first roller set and the second roller set to drive the first roller set and the second roller set to rotate respectively. The first power element is connected to the first gear set for providing a first power to the first gear set. Wherein, the first power is respectively transmitted to the first roller set and the second roller set through the first gear set, so that the first roller set rotates in a first rotation direction, and the second roller set rotates in a The second rotational direction rotates.

In a preferred embodiment, the paper discharge control module includes a first connection part, a second connection part, a switching element, a switching gear, a second gear set and a second power element. The first connecting portion is connected to a first roller set of the paper discharge roller module, and is used to drive the first roller set to move; wherein, the first connecting portion has a first chute. The second connection part is connected to a second roller set of the paper ejection roller module, and is used to drive the second roller set to move; wherein, the second connection part has a second sliding groove. The switching element is respectively connected with the first connecting part and the second connecting part, and is used to drive the first connecting part and the second connecting part to move relative to the cardboard, so that the first roller set and the second The two roller groups move separately. The switching gear is connected to the switching element in a meshing manner, and is used for rotating to drive the switching element to move relative to the cardboard. The second gear set meshes with the switching gear to drive the switching gear to rotate. The second power element is connected to the second gear set to provide a second power to the second gear set and the switching gear, so that the switching gear drives the switching element to move relative to the paper plate.

In a preferred embodiment, the present invention provides a paper discharge control module, which is applied to a printing device. The printing device includes a paper board and a paper discharge roller module. The paper discharge control module is connected to the paper discharge roller module, including the first A connection part, a second connection part, a switching element and a switching gear. The first connecting portion is connected to a first roller set of the paper discharge roller module, and is used to drive the first roller set to move; wherein, the first connecting portion has a first chute. The second connection part is connected to a second roller set of the paper ejection roller module, and is used to drive the second roller set to move; wherein, the second connection part has a second sliding groove. The switching element is respectively connected with the first connecting part and the second connecting part, and is used to drive the first connecting part and the second connecting part to move relative to the cardboard, so that the first roller set and the second The two roller groups move separately. The switching gear is connected to the switching element in a meshing manner, and is used for rotating to drive the switching element to move relative to the cardboard. Wherein, according to the switching element, the switching gear, the first connection part and the second connection part, the paper discharge roller module is controlled to change to a release state or a paper discharge state.

To sum up, the printing device and the paper discharge control module of the present invention can use the paper discharge control module to change the state of the paper discharge roller module to control the positions of the first roller set and the second roller set, so as to ensure that when the paper needs to be fed, Control the first roller group and the second roller group to clamp the paper. Or, when the paper needs to pass, control the gap between the first roller set and the second roller set to allow the paper to pass. Therefore, the printing device and the paper discharge control module of the present invention can change the positions of the first roller set and the second roller set through a simple mechanical structure, so as to improve the problem that the known printing device is prone to paper feeding failure. Wherein, when the paper discharge control module is in the paper feeding state, the first extension piece and the second extension piece can be locked without moving without using strong power elements as in the known technology.

Description of drawings

FIG. 1 is a schematic cross-sectional side view of a conventional printing device.

FIG. 2 is a schematic cross-sectional schematic diagram of a side view of the structure of the printing device of the present invention.

FIG. 3 is a schematic structural view of the paper discharge roller module and the paper discharge control module of the printing device of the present invention in a released state in a preferred embodiment.

FIG. 4 is an exploded schematic diagram of a partial structure of the paper discharge control module of the printing device of the present invention in a preferred embodiment.

FIG. 5 is a structural schematic diagram of another viewing angle of the paper discharge control module of the printing device in a preferred embodiment of the present invention.

FIG. 6 is a structural schematic diagram of the paper discharge roller module and the paper discharge control module of the printing device of the present invention in a paper discharge state in a preferred embodiment.

The reference signs are as follows:

1, 2... printing device

10...Printing device housing

11, 21... tray

12, 24... printing module

13...the first paper feeding channel

14...the first feed roller set

15...Binding device

20…position sensing module

23…feed roller

25…Finish Module

26…Output tray

27...set the cardboard

28...Exit Roller Module

29...Discharge control module

30, 151...Binding module

101...upper surface

102...Paper outlet

152…Binders

153...Second paper feeding path

154…Second Feed Roller Set

201…Light-emitting elements

202...Sensing element

203…Control unit

281...The first roller set

282…Second roller set

283…first gear set

284...First power element

291...First connecting part

292...Second connecting part

293…Switching elements

294…Switching gears

295…second gear set

296...second power element

2911...first chute

2921...second chute

2931…Body

2932…first extension piece

2933…second extension piece

2934…Third extension piece

2932A...first boss

2933A…second boss

C1...first direction of rotation

C2...Second direction of rotation

P, P*...paper

P1...first position

P2...Second position

P3…Third position

P4...fourth position

Detailed ways

In view of the problems caused by the known technology, the present invention provides a paper discharge control module and a printing device that can solve the known technical problems. Embodiments of the present invention will be further explained in conjunction with the accompanying drawings below. In the drawings, the shapes and dimensions may be exaggerated for simplification and convenient labeling. It can be understood that elements not particularly shown in the drawings or described in the specification are forms known to those skilled in the art. Those skilled in the art can make various changes and modifications according to the content of the present invention.

Firstly, the structure of the printing device of the present invention will be described. Please refer to FIG. 2 , which is a schematic cross-sectional side view of the structure of the printing device of the present invention. The printing device 2 of the present invention includes a paper feed box 21, a paper feeding channel 22, a plurality of paper feeding rollers 23, a printing module 24, a sorting module 25, a paper output box 26, a cardboard 27, a paper discharge roller module 28, and a paper discharge control module. 29 and binding module 30. The paper tray 21 is disposed at the bottom of the printing device 2 , and its function is to place paper P* thereon. The paper feeding channel 22 is located between the paper tray 21 and the cardboard 27 for the paper P* to pass through. A plurality of paper feeding rollers 23 are respectively arranged on the paper feeding channel 22, which can feed the paper P* to move in the paper feeding channel 22, and the printing module 24 is close to the paper feeding channel 22, and its function is to feed the paper P* When passing through the printing module 24, a printing operation is performed on the paper P*. The sorting module 25 is close to the cardboard 27 , and its function is to sort the multiple sheets of paper P* so that they are aligned with each other when the multiple sheets of paper P* approach the sorting module 25 . Wherein, the operation of the printing module 24 to print the paper P* and the operation of the sorting module 25 are well known to those skilled in the art, so details will not be repeated here.

The paper placing plate 27 is disposed adjacent to the output tray 26, and can place the paper P* thereon. The paper discharge roller module 28 is close to the paper placing plate 27 , and its function is to transport the paper P* to the paper output tray 26 . The paper discharge control module 29 is connected to the paper discharge roller module 28 , and its function is to control the paper discharge roller module 28 to change to a release state, so that the paper P* passes through the paper discharge roller module 28 and can be positioned on the paper plate 27 . Alternatively, the paper discharge roller module 28 can be controlled to change to a paper discharge state, so as to feed the paper P* to the output tray 26 . The binding module 30 is located above the output tray 26 , and its function is to perform binding operation on the aligned multiple sheets of paper P*.

Next, the detailed structure of each element will be described. Please refer to Fig. 2, Fig. 3 and Fig. 4 at the same time. Fig. 3 is a structural schematic diagram of the paper discharge roller module and paper discharge control module in a preferred embodiment of the printing device of the present invention in a released state, and Fig. 4 is a printout of the present invention. An exploded schematic diagram of a partial structure of the paper discharge control module of the device in a preferred embodiment. The paper discharge roller module 28 includes a first roller set 281 , a second roller set 282 , a first gear set 283 and a first power element 284 . The first roller set 281 is connected to the paper discharge control module 29 , and the second roller set 282 is located on one side of the first roller set 281 and connected to the paper discharge control module 29 . The first gear set 283 is connected to the first roller set 281 and the second roller set 282 respectively, and its function is to drive the first roller set 281 and the second roller set 282 to rotate respectively. The first power element 284 is connected to the first gear set 283 , and its function is to provide the first power to the first gear set 283 when being driven. Wherein, the first power is transmitted to the first roller set 281 and the second roller set 282 respectively through the first gear set 283, so that the first roller set 281 can rotate in the first rotation direction C1, and the second roller set 282 can rotate in the first rotation direction C1. A second rotational direction C2 opposite to the first rotational direction C1 rotates.

On the other hand, the paper discharge control module 29 includes a first connecting portion 291 , a second connecting portion 292 , a switching element 293 , a switching gear 294 , a second gear set 295 and a second power element 296 . The first connecting portion 291 is connected to the first roller set 281 and can drive the first roller set to move 281 , wherein the first connecting portion 291 has a first sliding slot 2911 . The second connecting portion 292 is located on one side of the first connecting portion 291 and is connected to the second roller set 282 , which can drive the second roller set 282 to move, wherein the second connecting portion 292 has a second sliding slot 2921 . The switching element 293 respectively protrudes into the first chute 2911 and the second chute 2921 to connect with the first connecting portion 291 and the second connecting portion 292, which can move relative to the cardboard 27 to drive the first connecting portion 291 and the second connecting portion 292 respectively. The second connecting portion 292 moves, and the detailed structure of the switching element 293 will be described later. According to the movement of the first connecting part 291 and the second connecting part 292 , the first roller set 281 and the second roller set 282 are driven to move respectively, thereby changing the state of the paper discharge roller module 28 .

Please refer to FIG. 3 , FIG. 4 and FIG. 5 at the same time. FIG. 5 is a structural schematic diagram of another viewing angle of the paper discharge control module of the printing device in a preferred embodiment of the present invention. The switching gear 294 is meshed with the switching element 293 , and it can rotate to drive the switching element 293 to move relative to the cardboard 27 . The second gear set 295 meshes with the switching gear 294 and can drive the switching gear 294 to rotate. The second power element 296 is connected to the second gear set 295, which may provide the second power to the second gear set 295 and the switching gear 294 when driven, so that the switching gear 294 can drive the switching element 293 to move relative to the cardboard 27 . In this preferred embodiment, both the first power element 284 and the second power element 296 are motors, which are only for illustration and not limited thereto.

The switching element 293 includes a body 2931 , a first extension piece 2932 and two extension pieces 2933 . The main body 2931 has a sawtooth bar 2931A, which can engage with the switching gear 294 so that the switching element 293 can move relative to the cardboard 27 . The first extension piece 2932 is disposed on the first end of the main body 2931 and is located on the first side of the main body 2931, wherein the first extension piece 2932 has a first protrusion 2932A, which extends into the first slide groove 2911 and can be positioned on the first sliding groove 2911. Move in a chute 2911. The second extension piece 2933 is disposed on the first end of the body 2931 and is located on the second side of the body 2931, wherein the second extension piece 2933 has a second protrusion 2933A, which extends into the second slide groove 2921 and can be positioned on the second side of the body 2931. Move in the second chute 2921. Wherein, when the switching element 293 moves relative to the cardboard 27 , the first protrusion 2932A abuts against the inner wall of the first chute 2911 to drive the first connecting portion 291 to move. On the other hand, the second protrusion 2933A abuts against the inner wall of the second slide groove 2921 to drive the second connecting portion 292 to move.

During the movement of the switching element 293, when the first protrusion 2932A is moved to the first position P1 of the first sliding slot 2911, and the second protrusion 2933A is moved to the third position P3 of the second sliding slot 2921, The paper discharge roller module 28 is in a released state, and the first roller set 281 is away from the second roller set 282 , as shown in FIG. 3 . When the first protrusion 2932A is moved to the second position P2 of the first chute 2911, and the second protrusion 2933A is moved to the fourth position P4 of the second chute 2921, the paper discharge roller module 28 is in the paper discharge state. , and the first roller set 281 is close to the second roller set 282 , as shown in FIG. 6 .

In order to ensure the normal operation of the paper discharge roller module 28, the printing device 2 of the present invention also includes a position sensing module 20, which is close to the switching element 293, and its function is to detect the position of the switching element 293, and calculate the moving speed of the switching element 293, by This can determine whether the paper discharge control module 28 is operating normally. The position sensing module 20 detects the position of the switching element 293 for judgment, so the switching element 293 further includes a third extension piece 2934 disposed on the second end of the body 291 and close to the position sensing module 20 .

On the other hand, the position sensing module 20 includes a light emitting element 201 , a sensing element 202 and a control unit 203 . The light emitting element 201 is close to the third extension piece 2934 and located on the first side of the third extension piece 2934, and its function is to generate light beams. The sensing element 202 is close to the third extension piece 2934 and located on the second side of the third extension piece 2934 , and its function is to output a corresponding signal according to whether the light beam is received. Wherein, when the paper discharge roller module 28 is in the release state or the paper discharge state, the sensing element 202 can receive the light beam, that is, the third extension piece 2934 is moved to a position away from the position sensing module 20 . When the paper discharge roller module 28 is in the switching state (that is, the process of changing to the release state or changing to the paper discharge state), the third extension piece 2934 blocks the light beam so that the sensing element 202 cannot receive the light beam.

The control unit 203 is connected to the sensing element 202, and its function is that according to the received first control signal and the second control signal, the control unit 203 can know the time when the sensing element 202 cannot receive the light beam, and thus can calculate the switch The moving speed of the component 293 is used to determine whether the paper discharge control module 28 is operating normally. In this preferred embodiment, the light emitting element 201 is a light emitting diode, the sensing element 202 is a light receiver, and the control unit 203 is a microprocessor.

Next, the operation of the printing device 2 of the present invention will be described. When the printing device 2 is driven, the paper discharge control module 29 operates: the second power element 296 drives the second gear set 295 to rotate and drive the switching gear 294 to rotate. The switching gear 294 can drive the switching element 293 to move relative to the cardboard 27 through the sawtooth bar 2931A. During the movement of the switching element 293, the first protruding post 2932A abuts against the inner wall of the first slide groove 2911 and moves to the first position P1, so as to drive the first connecting part 291 to move, and the second protruding post 2933A abuts against the second The inner wall of the slide slot 2921 moves to the third position P3 to drive the second connecting portion 292 to move. Thus, the first roller set 281 can be kept away from the second roller set 282 , so that the paper discharge roller module 28 is in a released state. The above operations can ensure that the discharge roller module 28 is in a released state.

On the other hand, a plurality of paper feed rollers 23 close to the paper tray 21 send the paper P* on the paper tray 21 into the paper feed path 22, and through the operation of the plurality of paper feed rollers 23, the paper P* is fed to close to the printing module 24. When the paper P* passes through the printing module 24, the printing module 24 performs a printing operation on the paper P*. Next, the paper P* continues to travel in the paper feeding channel 22 and is fed to the paper setting plate 27 by the plurality of paper feeding rollers 23 . At this time, the paper discharge roller module 28 is in the released state, and the plurality of paper feed rollers 23 can feed multiple sheets of paper P*, so that the first ends of the multiple sheets of paper P* pass through the first roller set 281 and the second roller set 282 and It is close to the sorting module 25 , and the second end of the multi-page paper P* is located on the cardboard 27 .

Next, the sorting module 25 sorts the multiple pages of paper P*, and the binding module 30 performs binding on the neatly sorted multiple pages of paper P*. After the multiple pages of paper P* are bound, the paper discharge control module 29 controls the paper discharge roller module 28 to change to the paper discharge state. Gear 294 rotates. The switching gear 294 can drive the switching element 293 to move relative to the cardboard 27 through the sawtooth bar 2931A. During the movement of the switching element 293, the first protrusion 2932A abuts against the inner wall of the first slide groove 2911 and moves to the second position P2 to drive the first connecting portion 291 to move, and the second protrusion 2933A abuts against the second The inner wall of the chute 2921 moves to the fourth position P4 to drive the second connecting portion 292 to move. When the first protrusion 2932A is moved to the second position P2, and the second protrusion 2933A is moved to the fourth position P4, the first extension piece 2932 and the second extension piece 2933 are respectively pushed by the first protrusion 2932A and the second extension piece. The boss 2933A abuts against the top and does not move relative to the cardboard 27 . In short, the first extension piece 2932 and the second extension piece 2933 can be locked by the mechanism without moving. Therefore, the paper ejection control module 29 of the present invention does not need to be locked by a strong power element.

Thus, the first roller set 281 can be made close to the second roller set 282 so that the paper discharge roller module 28 is in a paper discharge state. Wherein, multiple pages of paper P* are located between the first roller set 281 and the second roller set 282 . That is to say, the first roller set 281 and the second roller set 282 clamp the multiple sheets of paper P*, and the paper discharge roller module 28 operates, so that the first roller set 281 and the second roller set 282 transfer the multiple sheets of paper P* from The paper tray 27 is fed to the output tray 26. The above is the operation of the printing device 2 of the present invention.

It should be specially noted that the printing device of the present invention is not limited to include the binding module therein, and the above is only for illustration, not as a limitation.

According to the above, it can be seen that the printing device and the paper discharge control module of the present invention can use the paper discharge control module to change the state of the paper discharge roller module to control the positions of the first roller set and the second roller set, so as to ensure that when the paper needs to be fed, Control the first roller group and the second roller group to clamp the paper. Or, when the paper needs to pass, control the gap between the first roller set and the second roller set to allow the paper to pass. Therefore, the printing device and the paper discharge control module of the present invention can change the positions of the first roller set and the second roller set through a simple mechanical structure, so as to improve the problem that the known printing device is prone to paper feeding failure. Wherein, when the paper discharge control module is in the paper feeding state, the first extension piece and the second extension piece can be locked without moving without using strong power elements as in the known technology.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the claims of the present invention. Therefore, all other equivalent changes or modifications that do not deviate from the disclosed spirit of the present invention shall be included in the present invention within the claims.

Claims (12)

1. A printing apparatus, comprising:

a paper placing board for placing at least one piece of paper;

a paper discharge roller module, close to the paper placing plate, for outputting the at least one paper, the paper discharge roller module comprising:

the first roller group is connected with the paper discharge control module;

the second roller group is positioned at one side of the first roller group and is connected with the paper discharge control module;

the first gear set is connected with the first roller set and the second roller set respectively and is used for driving the first roller set and the second roller set to rotate respectively; and

the first power element is connected with the first gear set and used for providing first power to the first gear set; the first power is respectively transmitted to the first roller group and the second roller group through the first gear group, so that the first roller group rotates in a first rotating direction, and the second roller group rotates in a second rotating direction; and

the paper discharge control module is connected with the paper discharge roller module and used for controlling the paper discharge roller module to change into a release state so that the at least one piece of paper is positioned on the paper placing plate through the paper discharge roller module or controlling the paper discharge roller module to change into a paper discharge state so as to output the at least one piece of paper, and the paper discharge control module comprises:

the first connecting part is connected with a first roller group of the paper discharge roller module and is used for driving the first roller group to move; the first connecting part is provided with a first chute;

the second connecting part is connected with a second roller group of the paper discharge roller module and used for driving the second roller group to move; the second connecting part is provided with a second chute;

a switching element, which is respectively connected with the first connecting part and the second connecting part and is used for moving relative to the paper placing plate to drive the first connecting part and the second connecting part to move so as to respectively move the first roller group and the second roller group;

a switching gear connected to the switching element in a meshing manner for rotating to drive the switching element to move relative to the paper placing plate;

the second gear set is meshed with the switching gear and used for driving the switching gear to rotate; and

the second power element is connected with the second gear set and used for providing a second power for the second gear set and the switching gear, so that the switching gear drives the switching element to move relative to the paper placing plate.

2. The printing apparatus of claim 1, wherein the switching element comprises:

a body having a saw rack for engaging with the switching gear to move the switching member relative to the paper placing plate;

the first extension piece is arranged on a first end of the body and positioned on a first side of the body, and is provided with a first convex column which extends into the first chute and can move in the first chute; and

the second extension piece is arranged on the first end of the body and positioned on a second side of the body, and is provided with a second convex column which extends into the second chute and can move in the second chute; when the switching element moves relative to the paper placing plate, the first convex column props against the first sliding groove to drive the first connecting part to move, and the second convex column props against the second sliding groove to drive the second connecting part to move.

3. The printing apparatus of claim 2, wherein when the first protrusion is moved to a first position of the first chute and the second protrusion is moved to a third position of the second chute, the paper discharge roller module is in the released state and the first roller set is away from the second roller set; when the first convex column is moved to a second position of the first chute and the second convex column is moved to a fourth position of the second chute, the first extending piece and the second extending piece are respectively propped by the first convex column and the second convex column without moving relative to the paper placing plate, the paper discharging roller module is in the paper discharging state, and the first roller group is close to the second roller group.

4. The printing apparatus of claim 2, further comprising a position sensing module, proximate to the switching element, for detecting a position of the switching element and calculating a moving speed of the switching element to determine whether the paper discharge control module is operating properly.

5. The printing apparatus of claim 4, wherein the switching element further comprises a third extension piece disposed on a second end of the body, and the position sensing module comprises:

a light-emitting element, close to the third extension piece, located at a first side of the third extension piece, for generating a light beam;

a sensing element, close to the third extension piece, located at a second side of the third extension piece, for outputting a signal according to whether the light beam is received; when the paper discharging roller module is in the release state or the paper discharging state, the sensing element can receive the light beam; when the paper discharging roller module is in a switching state, the third extension piece shields the light beam, so that the sensing element cannot receive the light beam; and

and the control unit is connected with the sensing element and used for calculating the moving speed of the switching element according to the output signal which can receive the light beam and the output signal which can not receive the light beam so as to judge whether the paper discharge control module normally operates.

6. The printing apparatus of claim 1, further comprising:

a paper feeding box for placing at least one paper;

a paper feeding channel between the paper feeding box and the paper placing plate for the at least one paper to pass through;

the paper feeding rollers are respectively arranged on the paper feeding channel and used for feeding the at least one paper to move in the paper feeding channel;

the printing module is close to the paper feed channel and is used for printing the at least one paper when the at least one paper passes through the printing module; and

and the finishing module is close to the paper placing plate and is used for aligning at least two sheets of paper when the at least two sheets of paper are close to the finishing module.

7. The printing apparatus of claim 6, wherein when the paper discharge roller module is in the released state, the plurality of paper feed rollers feed the at least two sheets of paper such that a first end of the at least two sheets of paper passes through the first roller set and the second roller set and is close to the finishing module, and a second end of the at least two sheets of paper is located on the paper placing plate; when the paper discharging roller module is in the paper discharging state, the first roller group and the second roller group are respectively connected with the aligned at least two sheets of paper to feed the aligned at least two sheets of paper to leave the paper placing plate.

8. The printing apparatus of claim 7, further comprising a stapling module disposed proximate to an upper side of the paper placing plate for stapling the at least two sheets of paper aligned; when the aligned at least two sheets leave the paper placing plate and are close to the binding module, the binding module binds the aligned at least two sheets.

9. The utility model provides a paper discharge control module, is applied to a printing device, and this printing device includes a cardboard and a paper discharge gyro wheel module, and this paper discharge control module is connected in this paper discharge gyro wheel module, includes:

the first connecting part is connected with a first roller group of the paper discharge roller module and is used for driving the first roller group to move; the first connecting part is provided with a first chute;

the second connecting part is connected with a second roller group of the paper discharge roller module and used for driving the second roller group to move; the second connecting part is provided with a second chute;

a switching element, which is respectively connected with the first connecting part and the second connecting part and is used for moving relative to the paper placing plate to drive the first connecting part and the second connecting part to move so as to respectively move the first roller group and the second roller group; and

a switching gear connected to the switching element in a meshing manner for rotating to drive the switching element to move relative to the paper placing plate; the paper discharging roller module is controlled to be changed into a release state or a paper discharging state according to the switching element, the switching gear, the first connecting part and the second connecting part.

10. The paper discharge control module of claim 9, wherein the paper discharge control module

A gear set meshed with the switching gear for driving the switching gear to rotate; and

the power element is connected with the gear set and used for providing power for the gear set and the switching gear, so that the switching gear drives the switching element to move relative to the paper placing plate.

11. The paper discharge control module of claim 9, wherein the switching element comprises:

a body having a saw rack for engaging with the switching gear to move the switching member relative to the paper placing plate;

the first extension piece is arranged on a first end of the body and positioned on a first side of the body, and is provided with a first convex column which extends into the first chute and can move in the first chute; and

the second extension piece is arranged on the first end of the body and positioned on a second side of the body, and is provided with a second convex column which extends into the second chute and can move in the second chute; when the switching element moves relative to the paper placing plate, the first convex column props against the first sliding groove to drive the first connecting part to move, and the second convex column props against the second sliding groove to drive the second connecting part to move.

12. The paper discharge control module of claim 11, wherein when the first protrusion is moved to a first position of the first chute and the second protrusion is moved to a third position of the second chute, the paper discharge roller module is in the released state and the first roller set is away from the second roller set; when the first convex column is moved to a second position of the first chute and the second convex column is moved to a fourth position of the second chute, the first extending piece and the second extending piece are respectively propped by the first convex column and the second convex column without moving relative to the paper placing plate, the paper discharging roller module is in the paper discharging state, and the first roller group is close to the second roller group.

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