Image forming apparatus

Abstract

The utility model relates to the technical field of printer equipment, in particular to an imaging device which comprises a body and a carrying mechanism arranged on the body, the carrying mechanism comprises a carrying roller and a power transmission component, and the body comprises a frame; the first connecting component is detachably connected to the frame, a first side is arranged on the first connecting component, the carrying roller is provided with a first roller end protruding out of the first side, and a power receiving part is arranged at the first roller end; the second connecting component is provided with a second side opposite to the first side; the first side is provided with a first positioning part close to the first roller end, the second side is provided with a second positioning part fixedly matched with the first positioning part, and the power transmission component is close to the second positioning part and is connected with the power receiving part. According to the scheme, the structure is simple, the cost is low, application of the synchronous belt during part crossing can be reduced in practical application, the installation difficulty is reduced, and the risk of transmission failure caused by use damage of the synchronous belt is reduced.

Description

[0001] This application is a divisional application with application number 202323075392.1, application date November 14, 2023, and invention name “A driving device and printer”. Technical Field

[0002] The present application relates to the technical field of printer equipment, and in particular to an imaging device. Background Art

[0003] In the prior art, a transport shell and a drive mounting plate are provided on the printer frame, and both the transport shell and the drive mounting plate are mounted on the frame in a detachable manner. The transport roller is mounted on the transport shell and the transmission system is mounted on the drive mounting plate. The transmission system includes a driving gear for driving the transport roller to rotate. Accordingly, a transmission gear meshing with the driving gear is provided at one end of the transport roller. Thus, after receiving the driving force of the driving member, the transmission system transmits the driving force to the transmission gear through the driving gear, thereby driving the transport roller to rotate.

[0004] However, in the above structure, because the connection between the transport roller and the transmission system is arranged on two independent components, and due to the installation error of the transport shell and the drive mounting plate on the frame, the installation of the drive gear and the transmission gear will cause a large error, resulting in poor meshing accuracy, severe wear of both, and even tooth jumping, which affects the transport process of the recording material, and then affects the printing quality of the recording material, and may even cause paper jams. Utility Model Content

[0005] An embodiment of the present application provides an imaging device, comprising a main body and a conveying mechanism arranged on the main body, the conveying mechanism comprising a conveying roller and a power transmission component for receiving a driving force and driving the conveying roller, the main body comprising: a frame; a first connecting component detachably connected to the frame, the first connecting component having a first side, the conveying roller is rotatably arranged on the first connecting component and has a first roller end protruding from the first side, and the first roller end is provided with a power receiving member; a second connecting component detachably connected to the frame, the second connecting component having a second side arranged opposite to the first side, and the power transmission component is arranged on the first connecting component; wherein a first positioning portion close to the first roller end is provided on the first side, a second positioning portion fixedly matched with the first positioning portion is provided on the second side, and the power transmission component is close to the second positioning portion and engaged with the power receiving member.

[0006] In the embodiment of the present application, utilizing the above structure, after the first connecting member and the second connecting member are installed on the main body frame, due to the positioning cooperation between the first positioning portion and the second positioning portion, the first connecting member and the second connecting member are stably positioned and cooperated near the positions of the conveying roller and the power transmission member, so that there is a direct installation positioning relationship between the conveying roller and the power transmission member, thereby ensuring the joining accuracy between the conveying roller and the power transmission member, thereby achieving stable power transmission, reducing the increase in the parts size chain, and avoiding the occurrence of poor joining.

[0007] In a possible implementation, the first positioning portion protrudes outward on the first connecting member, and the second positioning portion penetrates the second connecting member and is perpendicular to the inner contour of the cross section in the penetration direction, and the inner contour is adapted to the protruding contour of the first positioning portion.

[0008] In a possible implementation manner, the first positioning portion is disposed around the axis of the first roller end.

[0009] In a possible implementation manner, the first positioning portion protrudes toward the outside of the first side to form a truncated cone, a through hole for the first roller end to pass through is provided in the middle of the truncated cone, and an axis of the truncated cone coincides with an axis of the first roller end.

[0010] In a possible implementation, the second positioning portion protrudes outward on the second connecting member, and the first positioning portion is recessed inward on the first side to form an inner recess, and a recessed contour of the inner recess is matched with a protruding contour of the second positioning portion.

[0011] In a possible implementation manner, the first side fits the second side to position the first connecting member and the second connecting member in a direction perpendicular to the first side.

[0012] In a possible implementation, the frame includes a side cover and a main frame body, the side cover is rotatably disposed on the main frame body and can be opened on the main frame body, and the first connecting member and the second connecting member can be detachably connected to the side cover.

[0013] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of a driving device provided in the present application in a specific implementation manner;

[0015] Figure 2 This is a schematic diagram of the structure of the transfer roller and the photosensitive drum provided in this application;

[0016] Figure 3 for Figure 1 A schematic diagram of the structure of the middle drive device meshing with the lifting gear;

[0017] Figure 4 for Figure 1 A schematic diagram of the structure of the middle drive device;

[0018] Figure 5 for Figure 4 Front view of the middle worm gear;

[0019] Figure 6 for Figure 1 Exploded view of the mid-drive unit;

[0020] Figure 7 for Figure 2 A cross-sectional view of

[0021] Figure 8 A schematic diagram of the structure of an imaging device provided in the present application in a specific implementation manner;

[0022] Fig. 9 A schematic diagram of the structure in which the first connecting member and the second connecting member provided in the present application are installed on the main frame;

[0023] Fig.10 for Fig. 9 A schematic diagram of the connection structure of the first connecting member, the second connecting member, the conveying roller and the power transmission member;

[0024] Fig.11 for Fig.10 Exploded view of the structure;

[0025] Fig.12 for Fig.11 A partial enlarged view of point A in the middle.

[0026] Reference numerals:

[0027] 1- driving device;

[0028] 11- driving member;

[0029] 12-worm gear mechanism;

[0030] 121-worm;

[0031] 122-worm gear;

[0032] 122a-chute;

[0033] 122b-first limiting portion;

[0034] 122c- second limiting portion;

[0035] 13- rotating shaft;

[0036] 131-limiting member;

[0037] 14-shaft sleeve;

[0038] 15-housing;

[0039] 151-cover plate;

[0040] 152- bottom plate;

[0041] 152a- boss;

[0042] 152b-mounting hole;

[0043] 16- driving gear;

[0044] 2-transfer belt assembly;

[0045] 21- transfer frame;

[0046] 22-transfer belt;

[0047] 23-lifting mechanism;

[0048] 231-lifting gear;

[0049] 232-cam;

[0050] 24-transfer roller;

[0051] 3-Photosensitive drum;

[0052] 4- Imaging device;

[0053] 401-Ontology framework;

[0054] 4011-side cover;

[0055] 41-paper box;

[0056] 42-Transportation organization;

[0057] 421-Conveying roller;

[0058] 4211-first roller end;

[0059] 4212-power receiving part;

[0060] 43 developing assembly;

[0061] 44-transfer assembly;

[0062] 45 fixing assembly;

[0063] 46-paper discharge assembly;

[0064] 5- a first connecting member;

[0065] 51 - first side;

[0066] 52-first positioning portion;

[0067] 6- second connecting member;

[0068] 61 - second side;

[0069] 62- second positioning portion;

[0070] 7- Power transmission components.

[0071] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0072] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0073] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0074] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0075] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0076] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0077] In a first aspect, the present application provides a printer, such as Figure 1 and Figure 2As shown, the printer includes a driving device 1, a transfer belt assembly 2 and a developing assembly. The transfer belt assembly 2 includes a transfer frame 21, a transfer belt 22 and a Figure 3 The lifting mechanism 23 shown, the transfer frame 21 includes a support roller for mounting the transfer belt 22, so that the transfer belt 22 moves under the action of the support roller, and the lifting mechanism 23 is used to drive the transfer frame 21 to lift or lower. The developing assembly includes a plurality of developing boxes, each of which is provided with a photosensitive drum 3 for contacting the transfer belt 22, and the color of the toner on each photosensitive drum 3 is different, and the plurality of developing boxes are spaced apart inside the transfer frame 21 along the length direction of the transfer belt assembly 2.

[0078] During the operation of the printer, the transfer belt 22 on the transfer frame 21 passes through each developing box in turn and contacts the photosensitive drum 3 on each developing box. Specifically, the lifting mechanism 23 is provided with a lifting gear 231 for connecting to the driving device 1, and the driving device 1 is provided with a driving gear 16. The driving device 1 cooperates with the lifting gear 231 through the driving gear 16 to drive the transfer belt 22 on the transfer frame 21 to lift or lower, thereby realizing the contact or separation of the transfer belt 22 and the photosensitive drum 3, thereby realizing the attachment of toner to the paper in the printer.

[0079] More specifically, the lifting mechanism 23 also includes a lifting shaft (not shown in the figure) arranged on the transfer frame 21 and a cam 232 arranged on the lifting shaft. The driving device 1 drives the lifting gear 231 to rotate through the driving gear 16. Since the lifting gear 231 and the cam 232 are coaxially arranged, the cam 232 can be driven to rotate, and the transfer frame 21 is driven to move during the rotation of the cam 232. When the cam 232 rotates to the first angle position, the transfer belt 22 on the transfer frame 21 is separated from each photosensitive drum 3, and this is the initial mode; when the cam 232 rotates to the second angle position, the transfer belt 22 on the transfer frame 21 is separated from the photosensitive drum 3 except the black one, and contacts the black photosensitive drum 3, and this is the black and white mode; when the cam 232 rotates to the third angle position, the transfer belt 22 on the transfer frame 21 contacts all the photosensitive drums 3 (the toner colors of each photosensitive drum 3 are magenta, cyan, yellow, and black, respectively), and this is the color mode.

[0080] It should be noted that the transfer belt assembly 2 also includes a transfer roller 24, which is used to cooperate with the photosensitive drum 3 to provide a clamping force for transferring the toner to the transfer belt 22, so that the toner is transferred to the transfer belt 22, and the transfer belt 22 then combines all the toners of all colors into a color image and transfers it to the paper to achieve image transfer. Specifically, multiple transfer rollers 24 correspond to multiple photosensitive drums 3 one by one, and multiple transfer rollers 24 and multiple photosensitive drums 3 can be located at both ends of the transfer belt 22 along its thickness direction.

[0081] In the initial mode, when the driving device 1 is in an unstarted state, the cam 232 of the lifting mechanism 23 is located at a first angle position, there is a gap between each photosensitive drum 3 and each transfer roller 24, and the transfer belt 22 is separated from each photosensitive drum 3. At this time, the toner on the photosensitive drum 3 cannot be transferred to the transfer belt 22, so that the printing process cannot be realized.

[0082] like Figure 4 As shown, the driving device 1 includes a driving member 11 and a worm gear mechanism 12, wherein the worm gear mechanism 12 includes a worm 121 and a worm wheel 122, wherein a driving gear 16 of the driving device 1 is connected to the worm wheel 122 via a rotating shaft 13 so as to transmit the power generated by the driving member 11 to the driving gear 16 so that the driving gear 16 can rotate.

[0083] When the driving device 1 is started, the driving device 1 drives the lifting gear 231 and the cam 232 to rotate through the driving gear 16. During the rotation of the cam 232, the rotation amount of the cam 232 can be converted into the translation amount of the transfer belt 22, so that the transfer belt 22 moves toward the direction close to the black photosensitive drum 3 and cooperates with the black photosensitive drum 3. At this time, the cam 232 rotates to the second angle position, the transfer belt 22 is separated from the photosensitive drum 3 except the black one, and contacts the black photosensitive drum 3, and the printer is in black and white mode.

[0084] During the printing process, the black photosensitive drum 3 and the transfer roller 24 corresponding to the black photosensitive drum 3 clamp the transfer belt 22 along the thickness direction of the transfer belt 22 to transfer the black toner to the transfer belt 22, so that the transfer belt 22 can subsequently combine the black toner into a color image and transfer it to the paper, thereby realizing black and white printing.

[0085] When the cam 232 rotates to the third angular position, the transfer belt 22 contacts all the photosensitive drums 3, and the printer is in color mode.

[0086] During the printing process, each photosensitive drum 3 and the corresponding transfer roller 24 clamp the transfer belt 22 along the thickness direction of the transfer belt 22 to transfer toner of different colors to the transfer belt 22, so that the transfer belt 22 can subsequently combine toner of different colors into a color image and transfer it to paper, thereby achieving color printing.

[0087] In the embodiment of the present application, the driving device 1 drives the cam 232 to rotate to different angles, so that the transfer belt 22 can contact or separate from each photosensitive drum 3, so that the printer can freely switch between the initial mode, black and white mode and color mode, thereby improving the diversity of printer functions and switching efficiency. At the same time, in the initial mode, each photosensitive drum 3 is separated from the transfer belt 22, which can avoid accidental contact and cause dry friction between the photosensitive drum 3 and the transfer belt 22, thereby reducing the possibility of damage to the photosensitive drum 3 and improving the service life of the printer. In the prior art, during the installation of the driving device 1, the lifting gear 231 will cooperate with the driving gear 16. Due to the self-locking property of the worm gear mechanism 12, the lifting gear 231 and the driving gear 16 are prone to top teeth during the cooperation process, resulting in the transfer belt assembly 2 being unable to be installed in place. The driving device 1 provided in the embodiment of the present application can well solve the above technical problems.

[0088] Specifically, Figure 4 As shown, the driving device 1 provided in the embodiment of the present application includes a driving member 11, a worm gear mechanism 12 and a rotating shaft 13. The worm gear mechanism 12 includes a meshing worm 121 and a worm wheel 122, the worm 121 is connected to the power output end of the driving member 11, and the rotating shaft 13 is sleeved in the worm wheel 122, so that the worm wheel 122 transmits the power generated by the driving member 11 to the rotating shaft 13, so that the rotating shaft 13 rotates under the drive of the worm wheel 122, thereby driving the driving gear 16 to rotate, and then the driving gear 16 and the lifting gear 231 are meshed with each other, driving the transfer belt 22 to move closer to or away from the direction of the photosensitive drum 3. Among them, the worm gear mechanism 12 is relatively stable during the transmission process, so that the printer has good working stability. At the same time, the noise generated during the working process is relatively small, which is conducive to improving the user experience.

[0089] like Figure 5 As shown, in the driving device 1 involved in the embodiment of the present application, the worm wheel 122 is provided with a first limiting portion 122b and a second limiting portion 122c, and a set angle is provided between the first direction x of the first limiting portion 122b and the first direction x of the second limiting portion 122c, and the first direction x is the radial direction of the rotating shaft 13. The rotating shaft 13 includes a limiting member 131, and the limiting member 131 can move around the axis of the rotating shaft 13 between the first limiting portion 122b and the second limiting portion 122c, so that the rotating shaft 13 can rotate relative to the worm wheel 122, thereby avoiding the occurrence of top teeth during the assembly process of the driving device 1 and the transfer belt assembly 2.

[0090] Specifically, due to the self-locking property of the worm gear mechanism 12, the rotating shaft 13 needs to rotate in the second direction y relative to the worm wheel 122 to eliminate the top tooth effect. Therefore, it is necessary to set a limit member 131 that can move around the axis of the rotating shaft 13 between the first limit portion 122b and the second limit portion 122c, so that the rotating shaft 13 can rotate relative to the worm wheel 122. When the driving gear 16 and the lifting gear 231 have top teeth, the driving gear 16 can rotate in the second direction y and drive the rotating shaft 13 to rotate in the second direction y relative to the worm wheel 122, thereby facilitating the engagement of the lifting gear 231 with the driving gear 16, thereby eliminating the top tooth phenomenon generated during the engagement process between the lifting gear 231 and the driving gear 16.

[0091] Therefore, in this embodiment, the limiting member 131 moves around the axis of the rotating shaft 13 between the first limiting portion 122b and the second limiting portion 122c, so that the worm wheel 122 and the rotating shaft 13 can rotate relative to each other, thereby solving the self-locking problem of the worm gear mechanism 12, and then solving the top tooth phenomenon generated during the assembly process of the driving device 1 and the transfer belt assembly 2, making it easier for users to assemble.

[0092] In a specific embodiment, Figure 5 As shown, the worm wheel 122 is formed with a slide groove 122a, and the oppositely disposed inner side walls of the slide groove 122a form a first limiting portion 122b and a second limiting portion 122c.

[0093] In the embodiment of the present application, when the rotating shaft 13 and the worm wheel 122 cooperate with each other, the limiter 131 is located in the slide groove 122a, and the limiter 131 can rotate in the slide groove 122a along the axial direction of the rotating shaft 13, so that the rotating shaft 13 can rotate relative to the worm wheel 122. During the assembly process of the driving device 1 and the transfer belt assembly 2, the slide groove 122a can provide a rotation space for the limiter 131, and at the same time, it can also play a certain limit on the rotation angle of the limiter 131, so as to eliminate the top tooth phenomenon while avoiding the limiter 131 from rotating too much along the second direction y, thereby reducing the possibility of damage to the worm gear mechanism 12. At the same time, the slide groove 122a can protect the limiter 131. The slide groove 122a is recessed inward relative to the end surface of the worm wheel 122, so that the limiter 131 can be located inside the worm wheel 122, reducing the possibility of interference between the two and other components in the driving device 1 and causing damage.

[0094] In a specific embodiment, Figure 5 As shown, the worm wheel 122 is provided with a plurality of slide grooves 122a, and the plurality of slide grooves 122a are distributed at intervals along the circumference of the worm wheel 122. The rotating shaft 13 is provided with a plurality of stoppers 131, and each stopper 131 is correspondingly arranged in each slide groove 122a.

[0095] In the embodiment of the present application, during the operation of the driving device 1, the cooperation between the plurality of limit members 131 and the plurality of slide grooves 122a can make the cooperation between the worm wheel 122 and the rotating shaft 131 tighter, and the relative rotation between the two is smoother, thereby improving the user experience. At the same time, during the rotation process, the plurality of limit members 131 abut against the side walls of the plurality of slide grooves 122a, and the plurality of limit members 131 are conducive to dispersing the force, reducing the possibility of damage to a single limit member 131 due to concentrated force, and improving the service life of the limit member 131.

[0096] Specifically, Figure 6 As shown, the slide groove 122a is a fan-shaped structure formed by being recessed outward along the center of the worm wheel 122. When the rotating shaft 13 and the worm wheel 122 rotate relative to each other, the fan-shaped slide groove 122a matches the rotation track of the stopper 131, so that the stopper 131 can have a larger movement space on the worm wheel 122, thereby expanding the distance that the stopper 131 rotates along the second direction y, and then the driving gear 16 can rotate the same distance along the second direction y, further reducing the possibility of the top tooth phenomenon, and improving the reliability of the cooperation between the lifting gear 231 and the driving gear 16. At the same time, the fan-shaped slide groove 122a can limit the stopper 131, so that the rotating shaft 13 can only rotate a certain angle relative to the worm wheel 122. When the rotating shaft 13 rotates along the second direction y relative to the worm wheel 122, the stopper 131 can abut against the side wall of one end of the slide slot 122a. At this time, due to the self-locking property of the worm gear mechanism 12, the slide slot 122a can limit the stopper 131 from sliding along the second direction y, thereby limiting the rotating shaft 13 from rotating along the second direction y relative to the worm wheel 122, thus providing safety protection for the driving device 1. When the driving device 1 is started, the worm wheel 122 can drive the rotating shaft 13 to rotate synchronously through the cooperation between the slide slot 122a and the stopper 131, thus improving the transmission efficiency of the driving device 1.

[0097] In a specific embodiment, Figure 6 As shown, the limit member 131 is a pin, which penetrates the rotating shaft 13 along the radial direction of the rotating shaft 13, so that the limit member 131 and the rotating shaft 13 can be detachably connected, and the pin is easy to produce and process. When the limit member 131 is damaged, it is easy to replace, which is beneficial to reduce maintenance costs.

[0098] In a specific embodiment, Figure 6 As shown, the stopper 131 is a protrusion protruding along the radial direction of the rotating shaft 13, and the protrusion is integrally formed on the rotating shaft 13 to improve the connection reliability between the stopper 131 and the rotating shaft 13, and there is no need to process a through hole on the rotating shaft 13, thereby improving the overall structural stability. At the same time, it can also simplify the manufacturing process, reduce production time and production cost.

[0099] like Figure 2and Figure 6 As shown, the driving device 1 also includes a housing 15, which includes a cover plate 151 and a bottom plate 152 that cooperate with each other. The cover plate 151 and the bottom plate 152 can enclose a receiving space for receiving the driving member 11, the worm gear mechanism 12 and the rotating shaft 13, wherein at least a portion of the rotating shaft 13 can extend from the bottom plate 152 to the receiving space and be connected to the driving gear 16.

[0100] In the embodiment of the present application, the driving member 11 is installed in the accommodation space surrounded by the cover plate 151 and the bottom plate 152 to improve the installation stability and reliability of the driving member 11, so that the worm gear mechanism 12 and the rotating shaft 13 connected to the driving member 11 can smoothly transmit power, reduce the possibility of tooth skipping between the driving gear 16 and the lifting gear 231, and improve the overall working stability. The housing 15 can protect the driving member 11, the worm gear mechanism 12 and the rotating shaft 13, and reduce the possibility of damage to the driving member 11, the worm gear mechanism 12 and the rotating shaft 13.

[0101] At the same time, if Figure 7 As shown, one end of the rotating shaft 13 connected to the driving gear 16 can extend out of the accommodating space surrounded by the cover plate 151 and the bottom plate 152, so that the driving gear 16 can mesh with the lifting gear 231, wherein the bottom plate 152 can provide support for the rotating shaft 13 to avoid the portion of the rotating shaft 13 extending out of the accommodating space from being in a suspended state, reduce the possibility of large deformation of the rotating shaft 13 at the connection with the worm gear 122, improve the structural stability of the rotating shaft 13, and thereby improve the stability and reliability during rotation.

[0102] In addition, the housing 15 can prevent debris from falling into the connection between the driving member 11, the worm gear mechanism 12 and the rotating shaft 13, thereby reducing the possibility of transmission failure and further improving the stability and reliability of the printer during operation.

[0103] In a specific embodiment, Figure 7 As shown, a boss 152 a extending outward relative to the bottom plate 152 is provided on the bottom plate 152 , and a mounting hole 152 b is provided on the boss 152 a . At least a portion of the rotating shaft 13 passes through the mounting hole 152 b and is connected to the driving gear 16 .

[0104] In the embodiment of the present application, the boss 152a can be raised relative to the bottom plate 152 in the direction close to the transfer belt assembly 2, so as to increase the contact area between the boss 152a and the shaft 13, thereby providing a more stable support effect, and at the same time can shorten the length of the shaft 13 in the suspended state, thereby reducing the bending stress on the shaft 13 and increasing the service life of the shaft 13. In addition, the mounting hole 152b can play a positioning role, which is conducive to the installation of the shaft 13, and the mounting hole 152b can improve the assembly accuracy of the drive device 1, which is conducive to strengthening the structural tightness of the drive device 1, thereby improving the working performance and service life.

[0105] Specifically, Figure 7 As shown, the driving device 1 further includes a sleeve 14, which is sleeved on the outer side of the rotating shaft 13 and installed in the installation hole 152b, and at least a portion of the sleeve 14 can abut against the outer wall of the boss 152a.

[0106] In the embodiment of the present application, the shaft sleeve 14 can limit the rotation shaft 13, reduce the possibility of vibration of the rotation shaft 13 during rotation, and improve the stability of the rotation shaft 13 during operation. The shaft sleeve 14 is sleeved on the outer side of the rotation shaft 13 to reduce wear of the rotation shaft 13 during rotation and improve the service life of the rotation shaft 13. In addition, if Figure 7 As shown, the sleeve 14 can be reversely installed in the mounting hole 152b so that at least a portion of the sleeve 14 can abut against the outer wall of the boss 152a, thereby improving the convenience during assembly and reducing the difficulty of installation.

[0107] In the second aspect of the present application, an imaging device is provided. The imaging device can be used for one or more of the functions of printing, scanning, copying, etc., and can also be the printer in the first aspect. Figure 8 The imaging device 4 includes a main body and a paper box 41, a conveying mechanism 42, a developing assembly 43, a transfer assembly 44, a fixing assembly 45 and a paper discharge assembly 46 arranged in the main body, wherein the paper box 41 can be detachably installed in the main body and is used to place the recording material used for imaging, the conveying mechanism 42 is used to convey the recording material to the developing assembly 43, and the developing assembly 43 transfers the image composed of toner to the recording material. The transferred recording material is further transported to the fixing assembly 45 for fixing, and is discharged through the paper discharge assembly 46 after printing is completed.

[0108] The recording material may be paper as mentioned in the embodiment of the first aspect, or may be other materials that can be used for printing, such as films.

[0109] In this embodiment, the developing component 43 includes a light scanning unit and one or more developing boxes, the transfer component 44 includes a transfer belt and a driving device for driving the transfer belt to move, the developing box includes a box body and a photosensitive drum, a developing roller and a charging roller arranged on the box body, toner is stored in the box body, the developing roller is used to transport the toner in the box body to the box body, the surface of the photosensitive drum is composed of photosensitive material, and can be fully charged under the action of the charging roller, the light scanning unit is used to emit light to the photosensitive drum, so that an electrostatic latent image is formed on the surface of the photosensitive drum, the toner transported by the developing roller forms an image under the action of the charge, the photosensitive drum transfers the image to the transfer belt, and the transfer belt further transfers the image to the recording material.

[0110] After the image transfer is completed, the recording material is further transported to the fixing component 45, which includes a fixing roller and a pressure roller. A heater is provided in the fixing roller, and the heater is used to provide heat to the fixing roller. A fixing nip is formed between the pressure roller and the fixing roller. When the recording material passes through the fixing nip, the toner is heated and melted on the surface of the recording material.

[0111] The paper discharge assembly 46 includes a paper discharge roller, which is used to discharge the printed recording material and is located at the end position of the paper conveying path, and discharges it to the paper discharge port or the paper discharge tray.

[0112] The paper conveying path is arranged in the main body, and the recording material starts from the paper box 41 and is discharged to the outside of the main body through the transfer assembly 44, the fixing assembly 45 and the paper discharge assembly 46. The paper conveying path can be divided into a first conveying path and a second conveying path. The first conveying path is applied to single-sided printing. The recording material arrives at the paper discharge assembly 46 after the paper box 41 to complete the printing process. The second conveying path is applied to double-sided printing. When the imaging device 4 performs double-sided printing, when the recording material arrives at the paper discharge assembly 46 along the first conveying path, it is returned to the second conveying path, and repeatedly passes through the transfer assembly 44 and the fixing assembly 45, and finally discharged through the paper discharge roller of the paper discharge assembly 46.

[0113] Among them, the main body includes a frame, the conveying mechanism 42 includes a conveying roller 421 and a transmission system for driving the conveying roller 421. In the existing technical solution, a conveying shell and a drive mounting plate are provided on the frame, and the conveying shell and the drive mounting plate are both installed on the frame in a detachable connection manner. The conveying roller 421 is installed on the conveying shell and the transmission system is installed on the drive mounting plate. The transmission system includes a driving gear for driving the conveying roller 421 to rotate. Accordingly, a transmission gear meshing with the driving gear is provided at one end of the conveying roller 421. Therefore, after receiving the driving force of the driving member, the transmission system transmits it to the transmission gear through the driving gear, thereby driving the conveying roller 421 to rotate.

[0114] However, in the above structure, because the connection between the conveying roller 421 and the transmission system is arranged on two independent components, and due to the installation error of the conveying shell and the drive mounting plate on the frame, a large error will occur in the installation of the drive gear and the transmission gear, resulting in poor meshing accuracy, severe wear of both, and even tooth jumping, which will affect the conveying process of the recording material, and then affect the printing quality of the recording material, and may even cause paper jam.

[0115] Based on this, see Figures 9 to 12 The present application provides an imaging device 4 in a second embodiment, comprising a body and a conveying mechanism 42 disposed on the body, wherein the conveying mechanism 42 comprises a conveying roller 421 and a power transmission member 7 for receiving a driving force and driving the conveying roller 421;

[0116] The main body includes:

[0117] Main body frame 401;

[0118] A first connecting member 5 detachably connected to the main body frame 401, the first connecting member 5 having a first side 51, a conveying roller 421 rotatably disposed on the first connecting member 5 and having a first roller end 4211 protruding from the first side 51, and a power receiving member 4212 disposed on the first roller end 4211;

[0119] A second connecting member 6 detachably connected to the main body frame 401 , the second connecting member 6 having a second side 61 disposed opposite to the first side 51 , and a power transmission member 7 disposed on the first connecting member 5 ;

[0120] A first positioning portion 52 close to the first roller end 4211 is provided on the first side 51 , a second positioning portion 62 fixedly matched with the first positioning portion 52 is provided on the second side 61 , and the power transmission component 7 is close to the second positioning portion 62 and engaged with the power receiving member 4212 .

[0121] With the above structure, after the first connecting member 5 and the second connecting member 6 are installed on the main body frame 401, due to the positioning cooperation between the first positioning portion 52 and the second positioning portion 62, the first connecting member 5 and the second connecting member 6 are stably positioned and matched at the position close to the conveying roller 421 and the power transmission member 7, so that there is a direct installation positioning relationship between the conveying roller 421 and the power transmission member 7, ensuring the engagement accuracy between the conveying roller 421 and the power transmission member 7, thereby achieving stable power transmission, reducing the increase in the part size chain, and avoiding the occurrence of poor engagement. This solution has a simple structure and low cost. In actual application, it can reduce the use of synchronous belts when crossing parts, reduce the difficulty of installation, and reduce the risk of transmission failure caused by damage to the synchronous belt.

[0122] Specifically, in this embodiment, the power receiving member 4212 and the power transmission member 7 are both gears, and power transmission is achieved by meshing with each other. The direct positioning installation method can reduce the dimension chain of the conveying roller 421 in the cross-part meshing, increase the stability of the transmission, and prevent the occurrence of misalignment. Compared with the independent installation of the conveying shell and the drive mounting plate in the prior art, the reduction of the dimension chain increases the meshing accuracy and is less likely to cause transmission jamming or tooth jumping.

[0123] In one embodiment of the present application, the first positioning portion 52 protrudes outward from the first connecting member 5, and the second positioning portion 62 penetrates the second connecting member 6 and has an inner contour on a cross section perpendicular to the penetration direction, and the inner contour is adapted to the protruding contour of the first positioning portion 52. Fig.11 and Fig.12 The first positioning portion 52 protrudes outward on the first side 51 of the first connecting member 5 to form a boss shape, and the raised outer edge of the boss has a corresponding raised contour. The second positioning portion 62 penetrates the second connecting member 6 to form a corresponding hole, groove or notch structure, and has a corresponding inner contour in the cross section perpendicular to the penetration direction. The inner contour is matched with the raised contour. When the first positioning portion 52 is inserted into the second positioning portion 62, the mutual fit between the inner contour and the raised contour fixes the former two, thereby making the first connecting member 5 and the second connecting member 6 relatively fixed at the corresponding position, which can effectively prevent loosening and displacement. Therefore, the joining position between the power receiving member 4212 and the power transmission member 7 can be regarded as a fixed whole, thereby reducing the installation size chain and ensuring the joining stability.

[0124] Furthermore, the first positioning portion 52 is arranged around the axis of the first roller end 4211 so that the circumferential position of the first roller end 4211 is fixed relative to the second connecting member 6 during the cooperation with the second positioning portion 62, thereby ensuring stable engagement between the power receiving member 4212 and the power transmission member.

[0125] Furthermore, the first positioning portion 52 protrudes toward the outside of the first side 51 to form a truncated cone, and a through hole is provided in the middle of the truncated cone for the first roller end 4211 to pass through, and the axis of the truncated cone coincides with the axis of the first roller end 4211. The through hole is a circular hole that transitionally matches the outer circumferential contour of the first roller end 4211, and the first roller end 4211 extends from the circular hole and passes through the second positioning portion 62. At this time, the second positioning portion 62 is a through hole that matches the outer contour of the truncated cone, and the power receiving member 4212 is located at the position where the first roller end 4211 passes through the second positioning portion 62 and is engaged with the power transmission member 7.

[0126] In another embodiment of the present application, the second positioning portion 62 protrudes outward on the second connecting member 6, and the first positioning portion 52 is recessed inward on the first side 51 to form a recess, and the recessed contour of the recess is adapted to the raised contour of the second positioning portion 62. This structure is another way to realize the positioning between the first connecting member 5 and the second connecting member 6, and no matter whether the protruding part is set on the first connecting member 5 or the second connecting member 6, stable positioning between the two members can be achieved. Of course, the first positioning portion 52 and the second positioning portion 62 can also be a structure combined with other positioning and fixing methods, which is not too limited in the present application.

[0127] In yet another embodiment of the present application, the first side 51 is fitted with the second side 61 to position the first connecting member 5 and the second connecting member 6 in a direction perpendicular to the first side 51. Fig.11 and Fig.12 The first connecting member 5 is arranged at a position close to the first side 51 of the second connecting member 6, and the second side 61 of the second connecting member 6 is opposite to and fits with the first side 51, so that the second connecting member 6 and the first connecting member 5 are positioned and fixed in a face-to-face manner. Here, the positioning method of fitting on both sides makes the phase position between the first connecting member 5 and the second connecting member 6 more stable, while maintaining the stable engagement between the conveying roller 421 and the power transmission member 7, other gears or synchronous belts in the transmission system can achieve good power transmission under a compact and stable installation structure.

[0128] In another embodiment of the present application, the main body frame 401 includes a side cover 4011 and a main frame, the side cover 4011 is rotatably arranged on the main frame and can be opened on the main frame, and the first connecting member 5 and the second connecting member 6 can be detachably connected to the side cover 4011. In this setting mode, the first connecting member 5 and the second connecting member 6 can be disassembled and assembled when the side cover 4011 is opened, which is convenient for maintenance. Of course, the first connecting member 5 and the second connecting member 6 can also be arranged on the main frame, and the installation effect of the conveying roller 421 can also be achieved. It can be reasonably arranged according to the internal layout of the imaging device 4, and no excessive restrictions are made here.

[0129] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An imaging device, comprising a main body and a conveying mechanism disposed on the main body, wherein the conveying mechanism comprises a conveying roller and a power transmission member for receiving a driving force and driving the conveying roller, characterized in that: The body comprises: frame; A first connecting member detachably connected to the frame, the first connecting member having a first side, the conveying roller rotatably disposed on the first connecting member and having a first roller end protruding from the first side, the first roller end being provided with a power receiving member; a second connecting member detachably connected to the frame, the second connecting member having a second side arranged opposite to the first side, the power transmission member being arranged on the first connecting member; The first side is provided with a first positioning portion close to the first roller end, the second side is provided with a second positioning portion fixedly matched with the first positioning portion, and the power transmission component is close to the second positioning portion and engaged with the power receiving component.

2. The imaging device according to claim 1, characterized in that The first positioning portion protrudes outward on the first connecting member, and the second positioning portion penetrates the second connecting member and is perpendicular to the inner contour of the cross section in the penetrating direction thereof, and the inner contour is adapted to the protruding contour of the first positioning portion.

3. The imaging device according to claim 2, characterized in that The first positioning portion is disposed around the axis of the first roller end.

4. The imaging device according to claim 3, characterized in that The first positioning portion protrudes toward the outside of the first side to form a truncated cone, a through hole for the first roller end to pass through is provided in the middle of the truncated cone, and an axis of the truncated cone coincides with an axis of the first roller end.

5. The imaging device according to claim 1, characterized in that The second positioning portion protrudes outward on the second connecting member, and the first positioning portion is recessed inward on the first side to form an inner concave portion, and the recessed contour of the inner concave portion is matched with the protruding contour of the second positioning portion.

6. The imaging device according to claim 1, characterized in that The first side is in contact with the second side to position the first connecting member and the second connecting member in a direction perpendicular to the first side.

7. The imaging device according to any one of claims 1 to 6, characterized in that: The frame comprises a side cover and a main frame body, the side cover is rotatably arranged on the main frame body and can be opened on the main frame body, and the first connecting member and the second connecting member can be detachably connected to the side cover.

Images