Double-sided printer

Abstract

The invention discloses a double-sided printer, and relates to the technical field of printing equipment. The double-sided printer comprises a first conveying mechanism, a first printing mechanism, a guide mechanism, a second conveying mechanism and a second printing mechanism, the first conveying mechanism is used for conveying paper in the first direction, the paper comprises a first surface and a second surface which are opposite, and the first surface of the paper located on the first conveying mechanism is arranged upwards; the first printing mechanism is used for printing a first surface; the guide mechanism is used for receiving the paper after the first surface is imaged and turning over the paper until the second surface faces upwards; the second conveying mechanism is used for receiving the paper overturned by the guide mechanism and conveying the paper along a second direction opposite to the first direction; the second printing mechanism is used for printing the second surface. The double-sided printer provided by the invention can improve the double-sided printing efficiency and ensure the image quality.

Description

Technical Field

[0001] The present invention relates to the technical field of printing equipment, and in particular to a double-sided printer. Background Art

[0002] Laser duplex printers are indispensable equipment in modern office environments. They use double-sided printing technology to print on both sides of the same paper. The emergence of double-sided printing technology has greatly improved printing efficiency, reduced paper usage, and met environmental protection requirements.

[0003] There are two types of laser double-sided printers in the related art. One type uses the forward and reverse rotation of the drive motor to drive the paper to flow in the front and back printing paths to achieve double-sided printing. This structure requires the motor to be reversed and started and stopped, and the printing efficiency is low. The other type has a complex printing path design, which uses positive and negative electric fields to synchronously transfer toners of different charges to the front and back of the paper. However, the support structure on the paper path of this design is prone to contact with the toner on the imaged and unfixed paper surface, affecting the printing quality.

[0004] Therefore, how to provide a laser double-sided printer that takes both printing efficiency and printing quality into consideration is a research direction in printing equipment technology. Summary of the invention

[0005] In view of the above-mentioned defects or shortcomings in the prior art, the present invention provides a double-sided printer, including a first conveying mechanism, a first printing mechanism, a guiding mechanism, a second conveying mechanism and a second printing mechanism, wherein the first conveying mechanism is used to convey paper along a first direction, the paper including a first surface and a second surface opposite to each other, and the first surface of the paper located at the first conveying mechanism is arranged upward; the first printing mechanism is used to print the first surface; the guiding mechanism is used to receive the paper after imaging on the first surface, and flip the paper over so that the second surface is arranged upward; the second conveying mechanism is used to receive the paper after flipping by the guiding mechanism, and convey the paper along a second direction opposite to the first direction; the second printing mechanism is used to print the second surface.

[0006] In some embodiments of the present invention, the first printing mechanism includes a first laser scanning unit and a first imaging component, the first laser scanning unit is located above the first conveying mechanism and is disposed toward the first surface, and the first imaging component is used to receive the laser of the first laser scanning unit and form an image on the first surface; and / or, the second printing mechanism includes a second laser scanning unit and a second imaging component, the second laser scanning unit is located above the second conveying mechanism and is disposed toward the second surface, and the second imaging component is used to receive the laser of the second laser scanning unit and form an image on the second surface.

[0007] In some embodiments of the present invention, the first imaging assembly includes a first photosensitive drum and a first transfer roller, the first photosensitive drum is located below the first laser scanning unit, and the first transfer roller is located below the first photosensitive drum.

[0008] In some embodiments of the present invention, the second imaging assembly includes a second photosensitive drum and a second transfer roller, the second photosensitive drum is located below the second laser scanning unit, and the second transfer roller is located below the second photosensitive drum.

[0009] In some embodiments of the present invention, the first imaging assembly and the second imaging assembly are arranged at intervals in the vertical direction, and at least a portion of the guide mechanism is located between the first imaging assembly and the second imaging assembly.

[0010] In some embodiments of the present invention, the first imaging component is located below the second imaging component, and the first laser scanning unit is located between the first imaging component and the second imaging component.

[0011] In some embodiments of the present invention, the first printing mechanism further includes a first fixing assembly, which is located between the first imaging assembly and the guide mechanism, and the first fixing assembly acts to fix the first surface after the first imaging; and / or, the second printing mechanism further includes a second fixing assembly, and the second fixing assembly acts to fix the second surface after the second imaging.

[0012] In some embodiments of the present invention, the guide mechanism includes a guide member, which includes a first guide surface and a second guide surface that are connected to each other, the first guide surface is used to receive the paper after the first surface is imaged, and flip the paper at a first angle, and the second guide surface is used to receive the paper that is flipped at the first angle, and flip the paper at a second angle so that the second surface of the paper faces upward.

[0013] In some embodiments of the present invention, the first guide surface is arranged in a vertical direction, the second guide surface is arranged in a horizontal direction, and the connection between the first guide surface and the second guide surface is an arc transition.

[0014] In some embodiments of the present invention, the first conveying mechanism includes a first correcting roller assembly and a first paper ejection roller assembly arranged in sequence along the first direction, the first imaging assembly is located between the first correcting roller assembly and the first paper ejection roller assembly, the first correcting roller assembly is used to receive and correct the paper when conveyed, and the first paper ejection roller assembly is used to convey the paper to the guide mechanism; and / or, the second conveying mechanism includes a second correcting roller assembly and a second paper ejection roller assembly arranged in sequence along the second direction, the second imaging assembly is located between the second correcting roller assembly and the second paper ejection roller assembly, the second correcting roller assembly is used to receive and correct the paper after flipping when conveyed, and the first paper ejection roller assembly is used to convey the paper to the outside of the double-sided printer.

[0015] The double-sided printer provided by the present invention has the following beneficial effects: The first conveying mechanism, the guide mechanism and the second conveying mechanism are used to directly convey and flip the paper, and there is no need to start or stop or perform forward and reverse operations on the first conveying mechanism and the second conveying mechanism, thereby saving printing time and improving printing efficiency; in addition, during the process of printing and conveying paper, the double-sided printer of the present application can make the surface to be printed of the paper during the printing process always face upward, so that during the conveying process after printing on the second surface, the support structure under the paper will not contact the printed surface image, thereby ensuring the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 This is a schematic diagram of a printing path of a double-sided printer provided by an embodiment of the present application; Figure 2 It is a schematic diagram of the structure of a double-sided printer provided by an embodiment of the present application.

[0017] The reference numerals are as follows: 100. Double-sided printer; 10. First conveying mechanism; 11. First correction roller assembly; 12. First paper discharge roller assembly; 20. first printing mechanism; 21. first laser scanning unit; 22. first imaging assembly; 221. first photosensitive drum; 222. first transfer roller; 23. first fixing assembly; 231. first heating roller; 232. first pressure roller; 30. Guide mechanism; 31. Guide member; 311. First guide surface; 312. Second guide surface; 313. Arc transition surface; 40. Second conveying mechanism; 41. Second correction roller assembly; 42. Second paper discharge roller assembly; 50, second printing mechanism; 51, second laser scanning unit; 52, second imaging assembly; 521, second photosensitive drum; 522, second transfer roller; 53, second fixing assembly; 531, second heating roller; 532, second pressure roller; 200, paper; 210, first surface; 220, second surface; X, first direction; Y, second direction; Z, vertical direction. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0020] It should be understood that although the terms first, second, third, etc. may be used to describe the acquisition modules in the embodiments of the present invention, the acquisition modules should not be limited to these terms. These terms are only used to distinguish the acquisition modules from each other.

[0021] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0022] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present invention are described at the angles shown in the drawings and should not be understood as limiting the embodiments of the present invention. In addition, in the context, it should also be understood that when it is mentioned that an element is formed "on" or "under" another element, it can not only be formed directly "on" or "under" another element, but also be formed "on" or "under" another element indirectly through an intermediate element.

[0023] In a related art, a double-sided printer is used in which when the first surface of the paper is printed, the conveying motor rotates forward to drive the paper into the printing path of the first surface, and the imaging and fixing of the first surface are completed in sequence. After the first surface is printed, the paper discharge roller at the end of the path does not completely remove the paper. At this time, the power of the first side printing path is disconnected by the clutch, and the main motor is reversed to drive the paper into the second surface printing path to complete the flipping of the paper head, paper tail and printing surface. When the paper enters the correction roller, the power of the double-sided paper path is disconnected by the clutch, and the motor is forward to print the reverse side of the paper. Since the paper flipping involves the start and stop of the motor forward and reverse rotation, and the path required for flipping the paper is too long, the speed of this structure is generally only 1 / 3 or less than 1 / 3 of the single-sided printing speed, and the printing production efficiency is not high.

[0024] Another type of double-sided printer uses positive and negative electric fields to transfer toner (developer) of different charges to the front and back of the paper synchronously, and then enters the fixing process to heat and solidify the toner. However, since there is uncured toner on both sides of the paper in the path between the transfer roller and the fixing module, it is easily affected by the paper rib position on the paper path structure before entering the fixing process, making it difficult to ensure the quality of image printing.

[0025] In view of this, the present embodiment provides a double-sided printer, in which the paper conveying path is formed in a structure approximately in a C-shape, so that the paper surface during printing can always be set upward, and the imaging surface of the paper during printing can always be set upward, so as not to be affected by the supporting structure.

[0026] The following is combined with Figure 1-2 The structure of a double-sided printer provided in an embodiment of the present application is introduced, and the unmarked arrows in the figure indicate the paper conveying direction.

[0027] Combined with Figure 1 and attached Figure 2 As shown, the embodiment of the present application provides a double-sided printer 100 , including a first conveying mechanism 10 , a first printing mechanism 20 , a guiding mechanism 30 , a second conveying mechanism 40 and a second printing mechanism 50 .

[0028] Among them, a part of the first conveying mechanism 10 can be located near the paper feed port of the body of the double-sided printer 100. The first conveying mechanism 10 of this embodiment is used to receive the paper 200 and convey the paper 200 along the first direction X (from left to right in the figure). The first conveying mechanism 10 may include multiple conveying roller assemblies, such as the first correction roller assembly 11 and the first paper discharge roller assembly 12 described below. Of course, the specific structural form of the first conveying mechanism 10 is not limited to this, as long as it can meet the requirements of conveying the paper 200 from the paper feed port to the guide mechanism 30.

[0029] When the paper 200 enters the first conveying mechanism 10, the first conveying mechanism 10 conveys the paper 200 without stopping. At this time, the first surface 210 of the paper 200 on the first conveying mechanism 10 is set upward. It should be understood that the directional words such as "up", "down", "vertical" and "horizontal" described in this embodiment refer to the direction or position of the body of the double-sided printer 100 during normal use.

[0030] When the first conveying mechanism 10 completely discharges the paper 200, part of the paper 200 has been flipped over on the guide mechanism 30, and the part has entered the second conveying mechanism 40. Therefore, in some embodiments, the guide mechanism 30 may not have the function of conveying the paper 200, but only has the function of receiving and guiding the flipping of the paper 200.

[0031] Of course, in some embodiments, the guide mechanism 30 can also be used to transport the paper 200 , for example, by adding a transport structure such as a transport roller to the guide mechanism 30 (not shown in the figure).

[0032] The first printing mechanism 20 of this embodiment is located on the paper 200 conveying path of the first conveying mechanism 10 , and at least part of the first printing mechanism 20 is located above the first surface 210 of the paper 200 , so that the first surface 210 of the paper 200 can be printed.

[0033] It should be noted that the printing of the first surface 210 of the paper 200 by the first printing mechanism 20 refers to forming a stable image on the paper 200 . The specific printing process may include the transfer of toner to the first surface 210 and heating and curing (fixing).

[0034] The guide mechanism 30 of this embodiment is used to receive the paper 200 after imaging on the first surface 210 and flip the paper 200 to face the second surface 220 upward. The specific structure of the guide mechanism 30 is given below.

[0035] The second conveying mechanism 40 of this embodiment may be partially located near the paper outlet of the machine body. The second conveying mechanism 40 is used to receive the paper 200 after being flipped over by the guide mechanism 30. The second conveying mechanism 40 is used to convey the paper 200 along a second direction Y (from right to left in the figure) opposite to the first direction X, and the second conveying mechanism 40 can discharge the paper 200 out of the machine body of the double-sided printer 100.

[0036] In some embodiments, the second conveying mechanism 40 may include the second correction roller assembly 41 and the second paper discharge roller assembly 42 described below. Of course, the specific structural form of the second conveying mechanism 40 is not limited to this, as long as it can meet the requirements of conveying the paper 200 from the guide mechanism 30 to the paper outlet.

[0037] The second printing mechanism 50 is used to form an image on the second surface 220. Similar to the above-mentioned first printing mechanism 20, the second printing mechanism 50 of this embodiment is located on the paper 200 conveying path of the second conveying mechanism 40, and at least a portion of the second printing mechanism 50 is located above the second surface 220 of the paper 200, so that the second surface 220 of the paper 200 can be printed.

[0038] The printing of the second surface 220 of the paper 200 by the second printing mechanism 50 also refers to forming a stable image on the paper 200. The specific printing process may include the transfer of toner to the second surface 220 and heating and curing (fixing).

[0039] The double-sided printer 100 of the above structure in this embodiment has at least the following advantages compared with the two printers in the related art: First, the double-sided printer 100 of this embodiment uses the first conveying mechanism 10, the guide mechanism 30 and the second conveying mechanism 40 to directly convey and flip the paper 200, without starting or stopping the first conveying mechanism 10 and the second conveying mechanism 40 or performing forward and reverse operations, thereby saving printing time and improving printing efficiency.

[0040] In addition, during the printing and conveying process of the paper 200, the double-sided printer 100 of this embodiment can make the surface to be printed of the paper 200 always face upward during the printing process, so that during the conveying process after printing on the second surface 220, the support structure under the paper 200 will not contact the unfixed surface image, thereby ensuring the printing quality.

[0041] Combined with the attachment again Figure 1 and attached Figure 2As shown, in some examples, optionally, the first printing mechanism 20 of the present embodiment includes a first laser scanning unit 21 and a first imaging component 22 , and / or, the second printing mechanism 50 of the present embodiment includes a second laser scanning unit 51 and a second imaging component 52 .

[0042] The above technical solution includes at least three implementation methods. One is that the first printing mechanism 20 includes a first laser scanning unit 21 and a first imaging component 22. The first printing mechanism 20 is a laser printing mechanism, while the second printing mechanism 50 is not a laser printing mechanism, and prints in other ways. Another is that the second printing mechanism 50 includes a second laser scanning unit 51 and a second imaging component 52. The second printing mechanism 50 is a laser printing mechanism, while the first printing mechanism 20 is not a laser printing mechanism. Another is that the first printing mechanism 20 includes a first laser scanning unit 21 and a first imaging component 22, and at the same time, the second printing mechanism 50 includes a second laser scanning unit 51 and a second imaging component 52. At this time, the first printing mechanism 20 and the second printing mechanism 50 are both laser printing structures. This embodiment is described by taking the last implementation method as an example.

[0043] The first laser scanning unit 21 is located above the first conveying mechanism 10 and is disposed toward the first surface 210 . The first laser scanning unit 21 needs to have a certain distance from the first surface 210 , and the distance can conveniently accommodate at least part of the first imaging component 22 of this embodiment.

[0044] The first laser scanning unit 21 irradiates a laser beam (generated by a laser diode) onto the first imaging assembly 22 of this embodiment (specifically, onto the first photosensitive drum 221 described below) through a series of reflection mirrors and focusing lenses.

[0045] After receiving the laser from the first laser scanning unit 21 , the first imaging component 22 sets carbon powder on the first surface 210 to form an image on the first surface 210 .

[0046] Similarly, the second printing mechanism 50 includes a second laser scanning unit 51 and a second imaging component 52. The second laser scanning unit 51 is located above the second conveying mechanism 40 and is set toward the second surface 220. The second laser scanning unit 51 needs to have a certain distance from the second surface 220, which can conveniently accommodate at least part of the second imaging component of this embodiment.

[0047] The second laser scanning unit 51 irradiates the laser beam onto the second imaging component 52 of this embodiment (specifically, onto the second photosensitive drum 521 described below). After receiving the laser from the second laser scanning unit 51, the second imaging component 52 sets the toner on the second surface 220 to form an image on the second surface 220.

[0048] In some examples, optionally, the first imaging assembly 22 of the present embodiment includes a first photosensitive drum 221 and a first transfer roller 222 .

[0049] The first photosensitive drum 221 of this embodiment is located below the laser scanning unit and above the first surface 210 . When the paper 200 is transported along the first direction X, the first photosensitive drum 221 may contact the first surface 210 .

[0050] The first transfer roller 222 is located below the first photosensitive drum 221 and contacts the second surface 220 of the paper 200 . The first photosensitive drum 221 and the first transfer roller 222 form an imaging and transfer system for the first surface 210 of the paper 200 .

[0051] When the first imaging component 22 of the present embodiment performs an imaging operation, the first photosensitive drum 221 of the present embodiment receives laser irradiation from the first laser scanning unit 21, and absorbs charged toner provided by a toner supply roller (not shown in the figure) at the irradiation point. Due to the attraction of the charge, the toner is absorbed to the unexposed and charged area on the photosensitive drum to form an image.

[0052] The first photosensitive drum 221 carrying the toner image continues to rotate, and when it contacts the first surface 210 of the paper 200, the first transfer roller 222 of this embodiment is applied with a positive charge, and the attraction of the charge causes the toner to be transferred from the first photosensitive drum 221 to the first surface 210 of the paper 200, forming a visible image.

[0053] Similarly, in some examples, optionally, the second imaging component 52 of the present embodiment includes a second photosensitive drum 521 and a second transfer roller 522, the second photosensitive drum 521 is located below the second laser scanning unit 51 and above the second surface 220, the second transfer roller 522 is located below the second photosensitive drum 521 and below the first surface 210 of the paper 200, and the second photosensitive drum 521 and the second transfer roller 522 form an imaging and transfer system for the second surface 220 of the paper 200.

[0054] The imaging process of the second photosensitive drum 521 and the second transfer roller 522 on the second surface 220 may refer to the description of the first photosensitive drum 221 and the first transfer roller 222 , which will not be described in detail in this embodiment.

[0055] In some examples, optionally, the first imaging component 22 and the second imaging component 52 are arranged at intervals along the vertical direction Z. The vertical direction Z is different from the first direction X and the second direction Y having only one directional component. The vertical direction Z described in this embodiment has two opposite sub-directions from top to bottom and from bottom to top.

[0056] Therefore, the first imaging assembly 22 and the second imaging assembly 52 of this embodiment are arranged at intervals along the vertical direction Z, which can be understood as including two situations. One is that the first imaging assembly 22 and the second imaging assembly 52 are arranged at intervals from bottom to top as shown in the figure, and the other is that the first imaging assembly 22 and the second imaging assembly 52 are arranged at intervals from top to bottom (not shown in the figure). Both methods can form a paper 200 conveying path that is approximately C-shaped.

[0057] The guide mechanism 30 of the present embodiment is at least partially located between the first imaging component 22 and the second imaging component 52, that is, the guide mechanism 30 may be completely located between the first imaging component 22 and the second imaging component 52, or may be partially located between the first imaging component 22 and the second imaging component 52, for example. Figure 2 The lower end of the guide mechanism 30 can be located below the first imaging component 22, and the upper end of the guide mechanism 30 can be roughly equal to the second imaging component 52. The specific position of the guide mechanism 30 is not excessively limited in this embodiment, as long as the guide mechanism 30 can satisfy the flipping and guiding function of the paper 200.

[0058] In some examples, optionally, the first imaging component 22 of the present embodiment is located below the second imaging component 52, the first laser scanning unit 21 is located between the first imaging component 22 and the second imaging component 52, and the second laser scanning unit 51 is located above the second imaging component 52, so that the running path of the paper 200 forms a form that is approximately similar to a C-shaped mirror image.

[0059] In addition to the above-mentioned first laser scanning component and the first imaging component 22, the first printing mechanism 20 of this embodiment also includes a first fixing component 23, which is located between the first imaging component 22 and the guide mechanism 30, and is used for fixing the first surface 210 after imaging.

[0060] Specifically, the first fixing assembly 23 of the present embodiment includes a first heating roller 231 and a first pressing roller 232 . The first heating roller 231 is located above the first pressing roller 232 , and the two rollers form a gap for the paper 200 to pass through.

[0061] The first pressure roller 232 ensures close contact between the paper 200 and the first heating roller 231 , and presses the paper 200 against the first heating roller 231 through the pressure of a torsion spring or other structure, thereby effectively fixing the toner on the paper.

[0062] The first heating roller 231 is used to heat the paper 200, melt the uncured toner on the paper 200, and fix it in the fibers of the paper 200, so as to form a stable image on the first surface 210, so that after the first surface 210 is turned over and contacts with supporting structures such as supporting ribs in the machine body (not shown in the figure), the image quality can be maintained, so as to facilitate subsequent printing on the second surface 220.

[0063] In addition, the first fixing assembly 23 may also include a paper output sensor (not shown in the figure), which is used to detect whether the outer edge or tail of the paper 200 passes through the first heating roller 231 and the first pressure roller 232, and is also used to detect whether there is a paper jam in the fixing / paper output module.

[0064] Similarly, the second printing mechanism 50 of this embodiment further includes a second fixing assembly 53, and the second fixing assembly 53 is used for fixing the second surface 220 after imaging.

[0065] The second fixing assembly 53 may include a second heating roller 531 and a second pressing roller 532. The second heating roller 531 is located above the second pressing roller 532, and the two form a gap that can press the paper 200. The working principles of the second heating roller 531 and the second pressing roller 532 can refer to the first heating roller 231 and the first pressing roller 232, which will not be described in detail in this embodiment.

[0066] The quality of the image on the second surface 220 after being fixed by the second fixing assembly 53 can be guaranteed, thereby maintaining the stability of the image during the paper output process.

[0067] Combined with the attachment again Figure 2 As shown, in some examples, optionally, the guide mechanism 30 of this embodiment includes a guide member 31, and the guide member 31 includes a first guide surface 311 and a second guide surface 312 connected in sequence along the vertical direction Z.

[0068] The first guide surface 311 of this embodiment is used to receive the paper 200 after the first surface 210 is imaged, and flip the paper 200 at a first angle. The second guide surface 312 is used to receive the paper 200 flipped at the first angle, and flip the paper 200 at a second angle so that the second surface 220 of the paper 200 faces upward.

[0069] In some embodiments, the first guide surface 311 of this embodiment is located below the second guide surface 312, and the first guide surface 311 is set in the vertical direction Z, and the second guide surface 312 is set in the horizontal direction. When the paper 200 enters the first guide surface 311, a first rotation occurs, so that the part of the paper 200 located on the first guide surface 311 is flipped about 90°, and then when entering the second guide surface 312, the paper 200 is rotated about 90° again, thereby realizing the flipping and repositioning of the first surface 210 and the second surface 220.

[0070] In order to reduce the impact on the image of the first surface 210 during the flipping process, the connection between the first guide surface 311 and the second guide surface 312 of this embodiment can be designed as an arc transition, specifically, an arc transition surface is set between the first guide surface 311 and the second guide surface 312, and the arc transition surface 313 can smoothly connect the first guide surface 311 and the second guide surface 312, so that the entire guide member 31 does not have convex ridges and other structures that affect the transportation of the paper 200. In addition, guide rollers (not shown in the figure) can be arranged near the first guide surface 311 and the second guide surface 312 to assist in driving the flipping of the paper 200.

[0071] Of course, the structural form of the guide mechanism 30 of this embodiment is not limited to this. For example, the guide mechanism 30 can also be in the form of a channel or a structural form of conveying paper 200 formed entirely by two rows of rotating rollers, which are not listed one by one in this embodiment.

[0072] Combined with the attachment again Figure 1 and 2 As shown, in some examples, optionally, the first conveying mechanism 10 includes a first correction roller assembly 11 and a first paper discharge roller assembly 12 which are sequentially arranged along the first direction X.

[0073] Along the first direction X, the first imaging assembly 22 of the present embodiment is located between the first correction roller assembly 11 and the first paper ejection roller assembly 12 , and the first paper ejection roller assembly 12 is located between the first fixing assembly 23 and the guide mechanism 30 .

[0074] The first correction roller assembly 11 may include one or two rollers, and a space for clamping and conveying the paper 200 is formed between the two rollers, and the conveying direction of the paper 200 can be limited to avoid the paper 200 from being offset in the width direction.

[0075] The first paper ejection roller may also include one or two roller members, and the first paper ejection roller is used to eject the paper 200 from the first conveying mechanism 10 of this embodiment and move the paper 200 toward the guide mechanism 30 of this embodiment.

[0076] Similarly, the second conveying mechanism 40 of this embodiment may include a second straightening roller assembly 41 and a second paper discharge roller assembly 42 arranged in sequence along the second direction Y. The second straightening roller assembly 41 is used to limit the conveying direction of the paper 200 to avoid the paper 200 from being offset in the width direction.

[0077] The second imaging assembly 52 is located between the second correction roller assembly 41 and the second paper ejection roller assembly 42, and the second correction roller assembly 41 is located between the guide mechanism 30 and the second imaging assembly 52. ​​The second paper ejection roller assembly 42 can be located near the paper outlet, and is used to eject the printed paper 200 out of the body of the double-sided printer 100 of this embodiment.

[0078] Of course, the structures of the first conveying mechanism 10 and the second conveying mechanism 40 of the present embodiment are not limited thereto. For example, the first conveying mechanism 10 and the second conveying mechanism 40 may also include other conveying roller structures.

[0079] In addition, the double-sided printer 100 of the present embodiment may further include a toner supply roller, a developing scraper, a cleaning roller, and a charging roller (not shown in the figure). The toner supply roller is used to provide toner to imaging components such as the first imaging component 22 and the second imaging component 52 of the present embodiment. The developing scraper and the cleaning roller are used to perform developing processing. The charging roller is used to charge imaging components such as the first imaging component 22 and the second imaging component 52. The number of toner supply rollers, cleaning rollers, and charging rollers may be one or more so as to match the number of imaging components.

[0080] Since the above-mentioned structures of the laser printer, such as the toner supply roller, developer scraper, cleaning roller and charging roller, are well known to those skilled in the art, this embodiment does not describe the above-mentioned structures and structures not mentioned in the laser printer (such as the housing), and those skilled in the art can refer to relevant technologies for understanding.

[0081] Combined with the attachment again Figure 1 and attached Figure 2 As shown, the specific working process of the double-sided printer 100 of this embodiment is described below: The paper 200 is first corrected by the first correction roller assembly 11, and then conveyed to the first imaging assembly 22 of this embodiment to image the upward first surface 210. The specific imaging process is achieved by the above-mentioned first laser scanning unit 21, first photosensitive drum 221 and first transfer roller 222.

[0082] After the first surface 210 is imaged, it is heated and developed by the first heating roller 231 and the first pressure roller 232 of the first developing assembly, and then transported to the guide mechanism 30 by the first paper discharge roller assembly 12 to be turned over.

[0083] The second surface 220 of the flipped paper 200 is imaged and enters the second correction roller assembly 41 for correction, and then the second surface 220 is imaged by the second laser scanning unit 51 , the second photosensitive drum 521 and the second transfer roller 522 .

[0084] After the second surface 220 is imaged, it is heated and developed by the second heating roller 531 and the second pressure roller 532 of the second developing assembly of this embodiment, and finally discharged by the second paper discharge roller assembly 42 .

[0085] The above description is only a preferred embodiment of the present invention. Those skilled in the art should understand that the scope of disclosure involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but also should cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present invention (but not limited to) to form a technical solution.

Claims

1. A double-sided printer, characterized in that: include: A first conveying mechanism is used to convey a paper in a first direction, wherein the paper comprises a first surface and a second surface opposite to each other, and the first surface of the paper located at the first conveying mechanism is arranged upward; a first printing mechanism, used for printing the first surface; A guide mechanism, used for receiving the paper after the first surface is imaged, and turning the paper over so that the second surface faces upward; A second conveying mechanism is used to receive the paper after being turned over by the guide mechanism and convey the paper along a second direction opposite to the first direction; as well as The second printing mechanism is used for printing the second surface.

2. The double-sided printer according to claim 1, characterized in that: The first printing mechanism includes a first laser scanning unit and a first imaging assembly, wherein the first laser scanning unit is located above the first conveying mechanism and is disposed toward the first surface, and the first imaging assembly is used to receive laser light from the first laser scanning unit and form an image on the first surface; And / or, the second printing mechanism includes a second laser scanning unit and a second imaging component, the second laser scanning unit is located above the second conveying mechanism and is arranged toward the second surface, and the second imaging component is used to receive the laser of the second laser scanning unit and form an image on the second surface.

3. The double-sided printer according to claim 2, characterized in that: The first imaging assembly includes a first photosensitive drum and a first transfer roller, the first photosensitive drum is located below the first laser scanning unit, and the first transfer roller is located below the first photosensitive drum.

4. The double-sided printer according to claim 2, characterized in that: The second imaging assembly includes a second photosensitive drum and a second transfer roller, the second photosensitive drum is located below the second laser scanning unit, and the second transfer roller is located below the second photosensitive drum.

5. The double-sided printer according to claim 2, characterized in that: The first imaging assembly and the second imaging assembly are arranged at intervals in the vertical direction, and at least a portion of the guide mechanism is located between the first imaging assembly and the second imaging assembly.

6. The double-sided printer according to claim 5, characterized in that: The first imaging component is located below the second imaging component, and the first laser scanning unit is located between the first imaging component and the second imaging component.

7. The double-sided printer according to claim 2, characterized in that: The first printing mechanism further comprises a first fixing assembly, the first fixing assembly being located between the first imaging assembly and the guide mechanism, and the first fixing assembly being used to fix the first surface after the first imaging; And / or, the second printing mechanism further includes a second fixing assembly, and the second fixing assembly is used to fix the second surface after the second imaging.

8. The double-sided printer according to any one of claims 2 to 7, characterized in that: The guide mechanism includes a guide member, and the guide member includes a first guide surface and a second guide surface connected to each other. The first guide surface is used to receive the paper after the first surface is imaged, and flip the paper at a first angle. The second guide surface is used to receive the paper flipped at the first angle, and flip the paper at a second angle so that the second surface of the paper faces upward.

9. The double-sided printer according to claim 8, characterized in that: The first guide surface is arranged in a vertical direction, the second guide surface is arranged in a horizontal direction, and a connection point between the first guide surface and the second guide surface is an arc transition.

10. The double-sided printer according to any one of claims 2 to 7, characterized in that: The first conveying mechanism comprises a first correction roller assembly and a first paper discharge roller assembly arranged in sequence along the first direction, the first imaging assembly is located between the first correction roller assembly and the first paper discharge roller assembly, the first correction roller assembly is used to receive and correct the paper for conveying, and the first paper discharge roller assembly is used to convey the paper to the guide mechanism; And / or, the second conveying mechanism includes a second correcting roller assembly and a second paper ejection roller assembly arranged in sequence along the second direction, the second imaging assembly is located between the second correcting roller assembly and the second paper ejection roller assembly, the second correcting roller assembly is used to receive and correct the paper after conveying and flipping, and the first paper ejection roller assembly is used to convey the paper out of the double-sided printer.

Images