CN201174036Y - Paper delivery mechanism for providing double-sided printing function and related printer - Google Patents

Abstract

A paper output mechanism for providing double-sided printing function and its related printer, the paper output mechanism includes a paper output wheel to push the recording medium to a first path; the switching device is used for switching to the first position, enabling the recording medium to travel from the first path to the second path or from the third path to the fourth path, switching to the second position, enabling the recording medium to travel from the first path to the third path, and the gear set, is used for pushing the recording medium from the first path to the third path when the switching device is switched to the second position, and is used for pushing the recording medium from the first path to the second path or pushing the recording medium from the third path to the fourth path and to the first path when the switching device is switched to the first position. When the printer with the paper discharging mechanism performs double-sided printing, a plurality of recording media are allowed to simultaneously travel in the paper conveying path through the switching device and the gear set. The printer also comprises a shell, a paper taking wheel, a developing system and a carbon powder fixing device.

Description

Paper output mechanism for providing double-sided printing function and its related printer

technical field

The utility model relates to a paper output mechanism and a related printer, in particular to a paper output mechanism for providing double-sided printing function and a related printer.

Background technique

When a general user needs to use a single-sided printing printer to print one side of a recording medium, he will put the side of the recording medium that needs to be printed into the single-sided printing printer to print the recording medium that needs to be printed on one side. However, when faced with the requirement of printing on both sides of the recording medium, the recording medium that has been printed on one side must be turned over manually to put it into a single-sided printing printer for printing on the other side of the single-sided recording medium. Printing on one side meets the requirement of printing on both sides of the recording medium. If the demand for recording media that needs to be printed on both sides is not large, the time required to manually turn over the recording media for double-sided printing is still at a loadable level, but if the demand for recording media that needs to be printed on both sides is large If it is too large, the time for rotating the recording media one by one to perform double-sided printing will increase a lot compared with the time for single-sided printing, which will cause considerable inconvenience to users. In addition to the inconvenience of time-consuming and labor costs for single-sided printing printers for recording media that need to be double-sided printed, because single-sided printing printers use manual methods to turn over the recording medium to complete the work of double-sided printing, so it is very difficult. It is easy to cause the non-printed side of the reversed recording medium to deviate from its original intended printing position, resulting in inconsistencies in the positions of the patterns printed on both sides of the recording medium, and also waste the cost of the recording medium.

Therefore, in recent years, printers with double-sided printing function have gradually become mainstream products in the printer market. The technology of double-sided printing is disclosed in US Patent Nos. 6185381, 6618577, and 4806979. After picking up paper from the slot, if you want to perform double-sided printing, the paper output roller will be reversed and pulled back into the path of double-sided printing, that is to say, the first side is printed first, and then the paper is pulled back for the second side. One-sided printing, while the printing of the next paper must wait for the previous paper to be ejected and then pulled back before it can be executed, which will reduce the printing speed of double-sided printing , so that the speed of double-sided printing is often only half of that of single-sided printing, which reduces the competitive advantage of the product in the market.

Utility model content

The purpose of the utility model is to provide a paper output mechanism and a related printer for providing double-sided printing function, so as to solve the above-mentioned problems.

The purpose of this utility model is achieved by disclosing a paper output mechanism for providing double-sided printing, which includes a paper pick-up wheel for pushing a recording medium to a first path; a switching device, Used to switch to a first position, so that the travel of the recording medium is switched from the first path to a second path or from a third path to a fourth path, and the switching device is used to switch to a first path Two positions for switching the travel of the recording medium from the first path to the third path; and a gear set for switching the recording medium from the first path when the switching device is switched to the second position The path is pushed to the third path, and the gear set is used to push the recording medium from the first path to the second path or the recording medium from the second path when the switching device is switched to the first position. Three paths are pushed to the fourth path and pushed to the first path by the fourth path.

The utility model also discloses a printer with a double-sided printing function, which includes a casing; a paper pick-up wheel, which is arranged in the casing, and the paper pick-up wheel is used to push a recording medium to a first path; a developing system arranged in the casing, the developing system is used to transfer toner to the recording medium in the first path; a toner fixing device is arranged in the casing, and the toner is fixed The device is used to fix the toner on the recording medium in the first path; and a paper output mechanism is arranged in the casing, and the paper output mechanism includes a switching device, which is used to switch to a first position, so that The travel of the recording medium is switched from the first path to a second path or from a third path to a fourth path, and the switching device is used to switch to a second position, so that the recording medium travels from The first path is switched to the third path; and a gear set is used to push the recording medium from the first path to the third path when the switching device is switched to the second position, and the gear The set is used to push the recording medium from the first path to the second path or push the recording medium from the third path to the fourth path when the switching device is switched to the first position and the The fourth path is pushed to the first path; a sensor is used to sense whether the recording medium is separated from the switching device and enters the third path; and a control unit is electrically connected to the sensor, and the control unit is used for According to the sensing result of the sensor, the gear set is controlled to push the recording medium from the third path to the fourth path, and the switching device is controlled to switch from the second position to the first position.

The utility model has the advantage that, compared with the prior art, the utility model uses a switching device to control the printer to achieve the single-sided or double-sided printing function, and improves the double-sided printing speed through the design of a special double-sided printing path. Since there is no need to stop taking paper or have to wait for the previous paper to be ejected and then pulled back when there are multiple double-sided printing, the double-sided printing speed of the printer of the utility model is almost the same. It is equal to the speed of single-sided printing, which is used to enhance the competitive advantage of the product in the market.

Description of drawings

Fig. 1 is the schematic diagram of the utility model printer;

Fig. 2 is a schematic diagram of the traveling path of the recording medium of the present invention in the printer;

Fig. 3 is a schematic diagram of the path of the recording medium when the printer of the present invention performs single-sided printing;

4 to 7 are schematic diagrams of the travel path of the recording medium when the printer of the present invention performs continuous double-sided printing.

Description of main component symbols

50 laser printer 51 recording media

511 First recording medium 512 Second recording medium

513 The third recording medium 52 Housing

53 imaging system 54 organic photoconductor

56 Electric wheel 58 Optical scanning device

60 toner cartridges 62 imaging wheels

64 transfer wheel 66 toner fixing device

68 discharge device 70 optical system module

72 Optical scanner module 73 Curved lens

74 mirror modules 76 laser source units

78 optical optimization units 80 paper slots

82 duplex printing module 84 first path

86 The second path 88 The third path

90 The fourth path 92 Pick up roller

94 switching devices 96 gear sets

961 first passive wheel 962 second passive wheel

963 the first driving wheel 964 the third passive wheel

965 second driving wheel 966 fourth passive wheel

967 fifth passive wheel 968 third driving wheel

969 paper output wheel 98 sensors

100 control units

Detailed ways

Please refer to FIG. 1 , which is a schematic diagram of a printer 50 of the present invention. Printer 50 can be a laser printer, and printer 50 comprises a casing 52, is used for coating the inner element of printer 50, and a developing system 53, is arranged in casing 52, and developing system 53 is used for the toner transfer Print to a recording medium 51. The imaging system 53 includes an organic photoconductor 54, which is rotatably arranged in the casing 52, and a distribution wheel 56, which is arranged in the casing 52, and is used to arrange positive charges on the organic photoconductor 54. . The printer 50 further includes an optical scanning device 58 disposed in the casing 52 for projecting laser light onto the organic photoconductor 54 , and a toner cartridge 60 disposed in the casing 52 for storing toner. The developing system 53 comprises a developing wheel 62 in addition, is arranged in the casing 52 and is positioned at the side of the toner box 60, and it can absorb the toner in the toner box 60, and a transfer wheel 64, is arranged on the machine housing 52 and is electrically connected to a negative bias voltage (not shown). The printer 50 further includes a toner fixing device 66 disposed in the housing 52 , which can melt the plastic component in the toner to fix the toner on the recording medium 51 . The imaging system 53 further includes a discharge device 68 disposed in the housing 52 for removing the charge on the organic photosensitive conductor 54 .

The printing principle and process of the printer 50 are described as follows. The electric distribution wheel 56 arranges positive or negative charges on the organic photoconductor 54 ; Since the organic photoconductor 54 is made of a highly photosensitive material, when a specific area on the organic photoconductor 54 receives the laser light emitted by the optical scanning device 58, the charge on the specific area will be due to the photons in the laser light. Irradiation makes the photosensitive material conductive and discharges, forming a latent image with a relatively low potential in that specific area. The potential of any point on the latent image is related to the power of the laser light received by the point. In other words, the higher the power of the laser light received by the point, the greater the potential difference of the point; The lower the power, the less the potential difference at this point; Afterwards, when the organic photoconductor 54 rotates to the position where the latent image is adjacent to the developing wheel 62, since the developing wheel 62 has adsorbed the stored toner cartridge 60 Therefore, a latent image with an appropriate potential can absorb the carbon powder on the imaging wheel 62, and the point with the larger potential difference on the latent image can absorb more carbon powder; Then, when the organic photoconductor 54 rotates to the position where the latent image is adjacent to the transfer wheel 64, the negative bias voltage to which the transfer wheel 64 is electrically connected is stronger than the potential at any point on the latent image (the negative bias voltage The absolute value is greater than the absolute value of the potential of any point on the latent image), so the transfer wheel 64 will transfer the toner on the latent image to the recording medium 51 between the transfer wheel 64 and the organic photoconductor 54 . At this moment, the toner on the recording medium 51 only relies on the electrostatic force between the toner itself and the recording medium to temporarily stay on the recording medium 51, so shaking of the printer 50 or any other external force may move the toner on the recording medium 51. ; When the recording medium 51 passed the carbon powder fixing device 66, the heat generated by the carbon powder fixing device 66 would melt the plastic composition in the carbon powder on the recording medium 51, and exert pressure on the carbon powder on the recording medium 51, with The toner on the recording medium 51 is fixed on the recording medium 51 . After the transfer wheel 64 transfers the toner on the latent image to the recording medium 51, and when the organic photoconductor 54 rotates to the position where the latent image is adjacent to the discharge device 68, the discharge device 68 will discharge the latent image. The electric charge on it is fully discharged, so that when the organic photosensitive conductor 54 rotates to the position where the specific area (the latent image has disappeared) is adjacent to the distribution wheel 56, it receives the distribution power of the distribution wheel 56 again. In addition, the optical scanning device 58 includes an optical system module 70 for generating a corresponding laser light according to a printing data, an optical scanner module 72 for reflecting the laser light generated by the optical system module 70, and a curved lens 73 , used to make the laser light reflected by the optical scanner module 72 travel at a constant linear velocity, the curved lens 73 can be an f-θ lens, and a mirror module 74, used to reflect the laser light transmitted by the curved lens 73 Laser to the organic photoconductor 54 . The optical system module 70 includes a laser source unit 76 for emitting laser light, and an optical optimization unit 78 for optimizing the laser light emitted by the laser source unit 76 .

Please refer to Fig. 2, Fig. 2 is a schematic diagram of the travel path of the recording medium 51 in the printer 50 of the present invention, the printer 50 also includes a paper slot 80, which is set in the casing 52 in a detachable manner, and the paper slot 80 is used to place the recording medium 51. The printer 50 also includes a paper output mechanism, which is arranged in the casing 52. The paper output mechanism includes a double-sided printing module 82 (duplex module), which can be an independent and detachable single module, allowing users to purchase additionally, or It is directly designed to be integrated in the printer 50 body, and shipped together with the printer 50. The traveling path of the recording medium 51 in the printer 50 includes a first path 84 , a second path 86 , a third path 88 , and a fourth path 90 . The paper output mechanism further includes a paper pick-up wheel 92, which is rotatably arranged above the paper slot 80 for taking out the recording medium 51 from the paper slot 80 and pushing it to the first path 84; a switching device 94, For switching between a first position and a second position, the switching device 94 can be a switching gate (switch gate); and a gear set 96, which is used to drive the recording medium 51 to advance.

The gear set 96 includes a first driven wheel 961, which is rotatably arranged on one side of the third path 88; a second driven wheel 962, which is rotatably arranged on one side of the fourth path 90; The wheel 963 is rotatably arranged between the third path 88 and the fourth path 90 and connected to the first driven wheel 961 and the second driven wheel 962, the first driving wheel 963 is used to drive the first driven wheel 961 and the second driven wheel Two driven wheels 962; a third driven wheel 964, which is rotatably arranged on the other side of the third path 88; a second driving wheel 965, which is rotatably arranged on this side of the third path 88 and is connected to The third driven wheel 964, the second driving wheel 965 is used to drive the third driven wheel 964; a fourth driven wheel 966 is rotatably arranged on the other side of the fourth path 90; a fifth driven wheel 967 is used to drive the third driven wheel 964; Rotatably arranged on one side of the first path 84; and a third driving wheel 968, rotatably arranged between the first path 84 and the fourth path 90 and connected to the fourth driven wheel 966 and the fifth driven wheel The wheel 967 and the third driving wheel 968 are used to drive the fourth driven wheel 966 and the fifth driven wheel 967 . The gear set further includes a paper output wheel 969 rotatably disposed on the second path 86 for taking the printed recording medium 51 away from the first path 84 . Wherein the first driven wheel 961, the second driven wheel 962, the first driving wheel 963, the third driven wheel 964 and the second driving wheel 965 located in the third path 88 are included in the duplex printing module 82, as mentioned above, The double-sided printing module 82 can be an independent and detachable single module. If there is no need for double-sided printing, the double-sided printing module 82 can be removed from the printer 50 to save the cost of the printer 50 . When the user needs to use the double-sided printing function, he only needs to purchase a double-sided printing module 82 and install it in the printer 50, and cooperate with the other driving wheels and driven wheels of the gear set 96, the switching device 94 and the control unit 100 to use the double-sided printing function. The printer 50 has a double-sided printing function.

Please refer to FIGS. 3 to 7. FIG. 3 is a schematic diagram of the path of the recording medium when the printer 50 of the present invention performs single-sided printing. FIGS. A schematic diagram of the travel path. As shown in Figure 3, first when the printer 50 prints the first recording medium 511, the pick-up roller 92 will take out the first recording medium 511 from the paper slot 80 and push the first recording medium 511 to the first path 84, and then The imaging system 53 transfers the toner to the first recording medium 511 in the first path 84, and the toner fixing device 66 fixes the toner to the first recording medium 511 in the first path 84, and completes the first recording medium 511 After that, the third driving wheel 968 rotates in the arrow direction shown in FIG. 3 to drive the fourth driven wheel 966 and the fifth driven wheel 967 to rotate in the arrow direction shown in The recording medium 511 moves toward the switching device 94 . If the user chooses to print the first recording medium 511 on one side, the switching device 94 will switch to the first position shown in FIG. path 86, and then the ejection wheel 969 can take the printed first recording medium 511 away from the first path 84, and guide the first recording medium 511 out of the paper ejection mechanism to complete the single-sided printing.

In addition, if the printer 50 performs continuous double-sided printing, as shown in FIG. Push the first recording medium 511 to the first path 84, then the imaging system 53 transfers the toner to the first recording medium 511 on the first path 84, and the toner fixing device 66 fixes the toner on the first path 84 The first recording medium 511, and the first side printing work of the first recording medium 511 is completed, and then the third driving wheel 968 rotates in the direction of the arrow shown in Figure 3 to drive the fourth driven wheel 966 and the fifth driven wheel 967 Rotate in the direction of the arrow shown in FIG. 3 to drive the first recording medium 511 to move in the direction of the switching device 94 . If the user selects double-sided printing on the first recording medium 511, the switching device 94 will switch to the second position shown in FIG. Travel switches from the first path 84 to the third path 88 . The second driving wheel 965 rotates in the direction of the arrow shown in Figure 4 to drive the third driven wheel 964 to rotate in the direction of the arrow shown in Figure 4, and the first driving wheel 963 rotates in the direction of the arrow shown in Figure 4, It is used to drive the first driven wheel 963 and the second driven wheel 962 to rotate in the direction of the arrow shown in FIG. 4 , so that the first recording medium 511 can be driven to continue moving toward the third path 88 .

As shown in Figure 5, the paper output mechanism further includes a sensor 98, which is arranged at one end of the third path 88, and the sensor 98 is used to sense whether the first recording medium 551 is separated from the switching device 94 and enters the third path 88 and a control unit 100 electrically connected to the sensor 98, the control unit 100 is used to control the gear set 96 to push the recording medium from the third path 88 to the fourth path 90 according to the sensing result of the sensor 98. When the sensor 98 senses that the first recording medium 551 has completely broken away from the switching device 94 and has fully entered the third path 88, that is, when the end of the first recording medium 551 is about to leave the sensor 98, the sensor 98 A corresponding signal will be transmitted to the control unit 100. After receiving the corresponding signal, the control unit 100 will control the first driving wheel 963 and the second driving wheel 965 to reverse in the direction of the arrow shown in FIG. 5, and control switching Device 94 is switched back to this first position by this second position, is used to stop the first recording medium 511, so the advancing of first recording medium 511 can be switched to the fourth path 90 by the 3rd path 88, this moment because of traveling direction change, the end of the first recording medium 511 will change to the front end and be introduced into the fourth path 90 by the switching device 94; at the same time, the pick-up wheel 92 will be ready to take out the next second recording medium 512 from the paper slot 80 and The second recording medium 512 is pushed to the first path 84 . In addition, in addition to using the sensor 98 to detect whether the first recording medium 551 is separated from the switching device 94 and entering the third path 88, the utility model switches the recording medium from the third path 88 to the fourth path 90. The design of the sensor 98 can be omitted and the method of timing control is adopted, which means that the first driving wheel 963 and the second driving wheel 965 are controlled to reverse at a specific interval, and the control switching device 94 is switched back from the second position to the first driving wheel. first position.

As shown in Figures 6 and 7, while the first recording medium 511 is advancing on the fourth path 90, the second recording medium 512 will perform single-sided printing in the same manner as the first recording medium 511 shown in Figure 4 work, so the first recording medium 511 and the first recording medium 512 will be processed simultaneously in the paper discharge mechanism; then the second recording medium 512 will be moved by the first recording medium 511 in the same way as the first recording medium 511 shown in Figure 5 The principle of switching from the path 84 to the third path 88 and then switching the travel of the second recording medium 512 from the third path 88 to the fourth path 90 is the same as above, and will not be described in detail here. Simultaneously, the first recording medium 511 will be pushed to the fourth path 90 by the first path 84, because the advancing direction of the first recording medium 511 changes, so the imaging system 53 transfers the toner to the first path 84 at this moment. The other side of the first recording medium 511, and the toner fixing device 66 fixes the toner on the other side of the first recording medium 511 in the first path 84, and completes the second side printing work of the first recording medium 511, that is The double-sided printing of the first recording medium 511 is completed. At the same time, the pick-up roller 92 is ready to take out the next third recording medium 513 from the paper slot 80 and push the third recording medium 513 to the first path 84, and continue to execute the above-mentioned paper feeding cycle. Therefore, when multiple double-sided printing is performed, the travel path and action of the recording medium shown in Figures 4 to 7 will be repeated, and there is no need to stop taking paper or waiting for paper to occur. The speed will be almost equal to that of simplex printing.

Claims (12)

1. A paper output mechanism for providing double-sided printing, characterized in that the paper output mechanism includes: a paper pick-up wheel for pushing the recording medium; for switching to a first position or a second position and a gear set for pushing the recording medium, wherein the traveling path of the recording medium includes a first path, a second path, a third path and a fourth path, and the advancing of the recording medium is determined by The pick-up wheel is pushed to the first path, when the switching device is switched to the first position, the recording medium is switched from the first path to the second path or from the third path to the fourth path , and is pushed from the first path to the third path through the gear set; when the switching device is switched to the second position, the recording medium is switched from the first path to the third path, and passed The gear set pushes the recording medium from the first path to the second path, or pushes the recording medium from the third path to the fourth path and from the fourth path to the first path . 2. The paper output mechanism according to claim 1, wherein the switching device is a switching gate. 3. The paper output mechanism according to claim 1, further comprising: a sensor for sensing whether the recording medium is separated from the switching device and enters the third path; and a control unit electrically connected to The sensor, the control unit is used to control the gear set to push the recording medium from the third path to the fourth path according to the sensing result of the sensor, and control the switching device to switch from the second position to the first position. 4. The paper output mechanism according to claim 1, wherein the gear set comprises: a first driven wheel, which is rotatably arranged on one side of the third path; a second driven wheel, which is rotatably arranged on one side of the third path; Set on one side of the fourth path; the first driving wheel is rotatably arranged between the third path and the fourth path and connected to the first driven wheel and the second driven wheel, the first The driving wheel is used to drive the first driven wheel and the second driven wheel; and the output wheel is rotatably arranged on the second path, and is used to take the printed recording medium away from the first path. 5. The paper output mechanism according to claim 4, wherein the gear set further comprises: a third driven wheel, rotatably arranged on the other side of the third path; and a second driving wheel, with It is rotatably arranged on the side of the third path and connected to the third driven wheel, and the second driving wheel is used to drive the third driven wheel. 6. The paper output mechanism according to claim 4, wherein the gear set further comprises: a fourth driven wheel rotatably arranged on the other side of the fourth path; a fifth driven wheel rotatably arranged on the other side of the fourth path; rotatably disposed on one side of the first path; and a third driving wheel rotatably disposed between the first path and the fourth path and connected to the fourth driven wheel and the fifth driven wheel, The third driving wheel is used to drive the fourth driven wheel and the fifth driven wheel. 7. A printer with a double-sided printing function, characterized in that the printer comprises: a casing; a paper pickup wheel arranged in the casing, and the paper pickup wheel is used to push the recording medium to the first path; The imaging system is arranged in the casing, and the imaging system is used to transfer the toner to the recording medium in the first path; the toner fixing device is arranged in the casing, and the toner fixing device is used for The toner is fixed on the recording medium from the first path; and the paper output mechanism is arranged in the casing, and the paper output mechanism includes: a switching device, which is used to switch to the first position, so that the recording medium The travel of the recording medium is switched from the first path to the second path or from the third path to the fourth path, and the switching device is used to switch to the second position, so that the travel of the recording medium is switched from the first path to the The third path; the gear set is used for pushing the recording medium from the first path to the third path when the switching device is switched to the second position, and the gear set is used for switching the switching device When reaching the first position, push the recording medium from the first path to the second path or push the recording medium from the third path to the fourth path and from the fourth path to the first path a sensor, used to sense whether the recording medium is separated from the switching device and enters the third path; and a control unit, electrically connected to the sensor, and the control unit is used according to the sensing result of the sensor The gear set is controlled to push the recording medium from the third path to the fourth path, and the switching device is controlled to switch from the second position to the first position. 8. The printer according to claim 7, further comprising: a paper slot disposed in the casing in a detachable manner, the paper slot is used to place the recording medium, wherein the paper The wheel is rotatably arranged above the paper slot for pushing the recording medium from the paper slot to the first path; the toner cartridge is arranged in the casing, and carbon powder is stored in the toner cartridge. Powder; and an optical scanning device arranged in the casing, the optical scanning device is used to project laser light onto the organic photosensitive conductor, wherein the imaging system includes: a developing wheel, arranged in the casing and located On one side of the toner cartridge, the imaging wheel is used to absorb the toner in the toner cartridge; the organic photosensitive conductor is rotatably arranged in the casing, and the organic photosensitive conductor is used to absorb the imaging wheel The carbon powder on the wheel; the electric distribution wheel, which is set in the casing, is used to arrange the charge on the organic photoconductor; the transfer printing wheel, which is set in the casing, and the transfer printing wheel is used to the carbon powder on the photoconductor is transferred to the recording medium between the transfer wheel and the organic photoconductor; and a discharge device is arranged in the casing, and the discharge device is used to remove the charge on the organic photoconductor . 9. The printer according to claim 7, wherein the switching device is a switching gate. 10. The printer according to claim 7, wherein the gear set comprises: a first driven wheel rotatably arranged on one side of the third path; a second driven wheel rotatably arranged on One side of the fourth path; and a first driving wheel, rotatably arranged between the third path and the fourth path and connected to the first driven wheel and the second driven wheel, the first driving wheel The wheel is used to drive the first driven wheel and the second driven wheel; and the output wheel is rotatably arranged on the second path, and is used to take the printed recording medium away from the first path. 11. The printer according to claim 10, wherein the gear set further comprises: a third driven wheel rotatably disposed on the other side of the third path; and a second driving wheel rotatably The way is arranged on the side of the third path and connected to the third driven wheel, and the second driving wheel is used to drive the third driven wheel. 12. The printer according to claim 10, wherein the gear set further comprises: a fourth driven wheel rotatably disposed on the other side of the fourth path; a fifth driven wheel rotatably disposed on one side of the first path; and a third driving wheel, rotatably disposed between the first path and the fourth path and connected to the fourth driven wheel and the fifth driven wheel, the first The three driving wheels are used to drive the fourth driven wheel and the fifth driven wheel.

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