Image forming apparatus

Abstract

The invention belongs to the field of printing equipment, and particularly relates to image forming equipment, the interior of a shell is divided into a first mounting cavity and a second mounting cavity through a partition plate, a paper conveying assembly, a developing assembly and a fixing assembly are all arranged in the first mounting cavity, and a control module and a driving assembly are both arranged in the second mounting cavity. The LED printing head is provided with a maintenance position located outside the first mounting cavity and a working position which is located in the first mounting cavity and right faces the photosensitive drum, and when the developing assembly needs to be replaced or the interior of equipment needs to be maintained, the LED printing head is switched to the maintenance position; the LED printing head cannot be collided and damaged in the process of replacing the developing assembly or overhauling the interior of equipment by a user, and after replacement or overhauling is completed, the LED printing head is switched to the working position and used for exposing the photosensitive drum in the image forming process. According to the image forming equipment, the internal space of the shell is reasonably arranged, so that the whole machine is compact in structure and small in size.

Description

Technical Field

[0001] The present application relates to the technical field of printing equipment, and in particular to an image forming device. Background Art

[0002] The printer's printing light source currently commonly uses two methods: laser and LED print head. Different from the principle of laser, LED print head is a diode array composed of many LED light-emitting diodes, and each pixel resolution corresponds to a light-emitting diode. Under the control of the printing signal, the part of the LED tube that needs to be printed is lit, and the light they generate is directly projected onto the surface of the photosensitive drum through the focusing head to complete the photosensitization process.

[0003] For portable printers, their portable nature determines that the printer cannot be too large. The components required for printing must be arranged in the limited internal space of the printer. Therefore, most of the smaller portable printers are inkjet printers. The core of the inkjet printer is the frame that drives the print head to move axially, which is convenient for miniaturization of the printer. However, inkjet printers generally have the problem of easy clogging of the print head. For example, after not being used for a period of time, the liquid ink dries and clogs the print head. The laser in the laser printer uses a high-power laser source. The structure requires multiple optical components such as deflection mirrors and lenses to generate a single-point light beam. The optical path is long and will take up a large space in the printer, making it difficult to miniaturize the laser printer. Summary of the invention

[0004] The embodiment of the present application provides an image forming device, which is designed to be based on an LED print head and utilize the limited space inside the printer to layout the required components for printing, thereby realizing an LED image forming device with a compact structure, small size, and easy to carry using a toner cartridge.

[0005] To achieve the above-mentioned purpose, the present application provides an image forming device, including a housing, a cover, a paper feeding assembly, a fixing assembly, an LED print head, a control module and a driving assembly; the housing is provided with an opening at the top, and the cover is arranged at the top of the housing for opening or closing the opening; the housing is provided with a partition for dividing the interior of the housing into a first installation cavity and a second installation cavity; the front side of the first installation cavity is provided with a paper feed port, and the rear side of the first installation cavity is provided with a paper outlet port, and the height difference between the paper feed port and the paper outlet port relative to the bottom surface of the housing is within 2 cm;

[0006] The paper feeding assembly is arranged flatly at the bottom of the first installation cavity, the developing assembly is detachably arranged above the paper feeding assembly, the fixing assembly is arranged on a side of the paper feeding assembly close to the paper outlet, and the output end of the fixing assembly faces the paper outlet; an opening for accommodating the LED print head is arranged above the photosensitive drum of the developing assembly, and the LED print head can switch between a position close to the photosensitive drum and a position away from the photosensitive drum;

[0007] A control module and a driving assembly are arranged in the second installation cavity. The control module is electrically connected to the driving assembly, the developing assembly, the fixing assembly, and the LED print head. The driving assembly is used to drive the paper feeding assembly, the developing assembly, and the fixing assembly.

[0008] Preferably, the height difference between the paper inlet and the paper outlet relative to the bottom surface of the housing is within 1 cm.

[0009] Preferably, the driving assembly includes a driving motor and a transmission gear set, a motor mounting plate is provided on the side of the partition facing the second mounting cavity through a supporting column, a spacing is provided between the motor mounting plate and the partition, the transmission gear set is located within the spacing and is rotatably provided on the partition, the transmission gear set includes an input gear shaft, a first driving gear, a second driving gear and a third driving gear that are meshed with each other, the driving motor is provided on the side of the motor mounting plate away from the partition, and the output shaft of the driving motor is connected to the input gear shaft, the first driving gear is meshed with the end of the paper feeding roller in the paper feeding assembly, and a clearance is provided on the partition at positions corresponding to the end of the paper feeding roller, the second driving gear and the third driving gear, the second driving gear is meshed with the end of the photosensitive drum in the developing assembly, and the third driving gear is meshed with the end of the heating roller in the fixing assembly.

[0010] Preferably, a guide groove for the end of the developing assembly to be inserted is provided on a side of the partition facing the first installation cavity and on a side of the inner wall of the first installation cavity opposite to the partition.

[0011] Preferably, the paper feeding assembly includes a supporting plate, a transfer roller rotatably disposed on the top of the supporting plate, and a pair of paper feeding rollers rotatably disposed on the top of the supporting plate and in contact with each other, the supporting plate is disposed at the bottom of the first mounting cavity, and the paper feeding rollers are opposite to the paper feed port.

[0012] Preferably, a cover plate is provided on the top of the second installation cavity, and a power button electrically connected to the control module is provided on the cover plate.

[0013] Preferably, the image forming device also includes a bracket, one end of the bracket is rotatably connected to the top of the partition toward one side of the first mounting cavity, the bracket can be rotated relative to the shell between the inspection position and the working position, the LED print head is arranged on the bracket, and in the process of the bracket rotating from the inspection position to the working position, the bracket drives the LED print head to move from outside the shell into the first mounting cavity and close to the photosensitive drum; in the process of the bracket rotating from the working position to the inspection position, the bracket drives the LED print head away from the photosensitive drum and moves to outside the first mounting cavity.

[0014] Preferably, a hinge seat is provided on the side of the top of the partition facing the first installation cavity, a limiting notch is provided on the inner wall of the first installation cavity at a position opposite to the hinge seat, one end of the bracket is hinged to the hinge seat, and when the bracket is in the working position, the end of the bracket away from the hinge seat is limited in the limiting notch, and the LED print head is parallel to the axial direction of the photosensitive drum in the developing assembly; when the bracket is in the inspection position, the end of the bracket away from the hinge seat is disengaged from the limiting notch.

[0015] Preferably, the developing assembly is provided with an opening for inserting the LED print head, and both end covers in the length direction of the developing assembly are provided with a support for supporting both ends of the LED print head in the length direction.

[0016] Preferably, the image forming device also includes a connecting rod mechanism, and the LED print head is connected to the inner side of the machine cover through the connecting rod mechanism. When the machine cover is switched from an open position to a closed position, the connecting rod mechanism drives the LED print head close to the photosensitive drum in the developing assembly; when the machine cover is switched from the closed position to the open position, the connecting rod mechanism drives the LED print head away from the photosensitive drum.

[0017] Preferably, in the process of switching the machine cover from the closed position to the open position, the connecting rod mechanism drives the LED print head away from the photosensitive drum and finally adheres to the inner side of the machine cover, and the length direction of the LED print head is always parallel to the axial direction of the photosensitive drum in the developing assembly.

[0018] Preferably, the connecting rod mechanism includes a swing arm and a connecting rod, one end of the swing arm is hinged to the inner side of the machine cover, the other end of the swing arm is connected to the LED print head, one end of the connecting rod is hinged to the shell, the hinge is close to the hinge between the shell and the machine cover, and the other end of the connecting rod is hinged to the swing arm.

[0019] The image forming device provided by the present application has the following beneficial effects: compared with the prior art, the image forming device of the present application comprises a first installation cavity and a second installation cavity separated by a partition, the driving and control components are arranged in the second installation cavity, the paper feeding component and the fixing component are arranged flat at the bottom of the first installation cavity, and the developing component is detachably arranged above the paper feeding component, near the paper inlet. The developing component comprises a developing box and a photosensitive drum box, the developing box comprises a powder bin, a developing roller, a powder feeding roller, etc., the photosensitive drum box comprises a photosensitive drum, a charging roller, etc., and the developing component can be a split structure of the developing box and the photosensitive drum box, or a one-piece structure of the developing box and the photosensitive drum box. The fixing component is arranged adjacent to the side of the paper feeding component close to the paper outlet, and the output end of the fixing component is directly opposite to the paper outlet, the horizontal height difference between the paper inlet and the paper outlet is small, and the paper path of the paper is basically in the shape of a "one". By reasonably setting the physical space of the image forming device, the partitioned setting of the components is realized, the structural layout between the components is compact, and the formed paper path is short, which can make the image forming device small in size and easy to carry.

[0020] An opening for accommodating an LED print head is provided above the photosensitive drum of the developing assembly, and the LED print head can switch between a position close to the photosensitive drum and a position away from the photosensitive drum. When the developing assembly needs to be replaced or the interior of the device needs to be repaired, the machine cover is opened and the LED print head is switched to a position away from the photosensitive drum. The LED print head will not be damaged when the user replaces the developing assembly or repairs the interior of the device. After the replacement or repair is completed, the LED print head is switched to a position close to the photosensitive drum to expose the photosensitive drum during the image formation process. The non-fixed contact setting of the LED print head and the photosensitive drum can provide users with a reasonable operating space when replacing the developing assembly or repairing image forming equipment failures, and also plays a role in protecting the LED print head. Moreover, the LED print head can switch between a position close to the photosensitive drum and a position away from the photosensitive drum, which can save space for the image forming device compared to a fixed setting (i.e., a fixed space reserved between the print head and the photosensitive drum). BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] in:

[0023] Figure 1 is a schematic diagram of the overall structure of an image forming device shown in one embodiment of the present application;

[0024] Figure 2 yes Figure 1 A schematic structural diagram of an image forming device from another perspective shown;

[0025] Figure 3 is a cross-sectional structural schematic diagram of an image forming device in a working state shown in one embodiment of the present application;

[0026] Figure 4 yes Figure 1 A schematic diagram of an image forming device shown with the housing on the left side of the second installation cavity hidden;

[0027] Figure 5 is Figure 4 A schematic diagram showing the control module and drive motor hidden behind the base;

[0028] Figure 6 is Figure 5 A schematic diagram of the base hiding the motor mounting plate;

[0029] Figure 7 is a structural schematic diagram of a paper feeding assembly in an image forming device shown in an embodiment of the present application;

[0030] Figure 8 is a schematic structural diagram of a developing assembly in an image forming device according to an embodiment of the present application;

[0031] Fig. 9 is a schematic structural diagram of a fixing assembly in an image forming device according to an embodiment of the present application;

[0032] Fig.10 is a schematic diagram of the overall structure of an image forming device shown in another embodiment of the present application;

[0033] Fig.11 yes Fig.10 A side view of the image forming apparatus shown;

[0034] Fig.12 yes Fig.10 A cross-sectional structural schematic diagram of the image forming device in working state shown;

[0035] Fig.13 is a schematic structural diagram of a first installation cavity in an image forming device shown in an embodiment of the present application;

[0036] Fig.14 yes Fig.13 A schematic structural diagram of the first installation cavity from another perspective shown;

[0037] Fig.15 is a structural schematic diagram of a hinge seat in an image forming device shown in an embodiment of the present application;

[0038] Fig.16It is a schematic diagram of the connection between the LED print head and the bracket in the image forming device shown in one embodiment of the present application;

[0039] Fig.17 yes Fig.16 A schematic diagram of another perspective of the connection between the LED print head and the bracket shown;

[0040] Fig.18 yes Fig.16 A schematic diagram showing the connection between the LED print head and the bracket from another perspective is shown.

[0041] Description of main component symbols:

[0042] 10. Shell; 101. Paper inlet; 102. Paper outlet; 11. Partition plate; 12. Articulated seat; 121. Side plate; 122. Fixed plate; 1221. Wire hole; 123. Rotating shaft; 13. Limiting notch; 131. First clamping part; 14. Motor mounting plate; 15. Cover plate; 16. Power button;

[0043] 20. Engine cover;

[0044] 30. Paper feeding assembly; 31. Carrying plate; 32. Transfer roller; 33. Paper feeding roller;

[0045] 40. developing assembly; 41. photosensitive drum; 42. opening; 43. support platform;

[0046] 50. Fixing assembly;

[0047] 60, LED print head; 601, folding surface; 602, end edge; 603, convex part; 604, plane;

[0048] 70. Control module;

[0049] 81, driving motor; 82, transmission gear set; 821, input gear shaft; 822, first driving gear; 823, second driving gear; 824, third driving gear;

[0050] 90, bracket; 901, hinged ear; 91, second clamping portion; 92, top plate; 93, turning plate; 94, receiving plate; 95, mounting plate; 96, spring; 97, limit head; 98, pin shaft;

[0051] 100, connecting rod mechanism; 110, swing arm; 111, mounting bar; 112, connecting rod; 120, connecting rod;

[0052] 200, guide groove;

[0053] 300. Elastic protrusion. DETAILED DESCRIPTION

[0054] In order to facilitate the understanding of the present application, the present application will be described more comprehensively with reference to the relevant drawings below. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0055] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0056] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] In addition, the terms "first", "second" and the like are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0059] It should also be noted that, in the embodiments of the present application, the same figure mark is used to represent the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or components as an example. It should be understood that the figure mark also applies to other identical parts or components.

[0060] The embodiment of the present application provides an image forming device, such as Figure 1-Figure 4 and Figure 7-Figure 9As shown, the image forming device includes a housing 10, a cover 20, a paper feeding assembly 30, a fixing assembly 50, an LED print head 60, a control module 70 and a driving assembly. The housing 10 has an opening at the top, and the cover 20 is arranged at the top of the housing 10 for opening or closing the opening; a partition 11 is vertically arranged in the housing 10, and the partition 11 divides the interior of the housing 10 into a first installation cavity and a second installation cavity, a paper feed port 101 is arranged at the front side of the first installation cavity, and a paper outlet 102 is arranged at the rear side of the first installation cavity, and the distance from the lower end of the paper feed port 101 to the bottom surface of the housing 10 and the distance from the lower end of the paper outlet 102 to the bottom surface of the housing 10 differ within 2 cm, and preferably, the distance from the lower end of the paper feed port 101 to the bottom surface of the housing 10 and the distance from the lower end of the paper outlet 102 to the bottom surface of the housing 10 differ within 1 cm, for example, 1 cm, or 0.7 cm. So that the paper path is basically in a straight line. The paper feeding assembly 30 is laid flat at the bottom of the first installation cavity, and the developing assembly 40 (selenium drum) is detachably arranged above the paper feeding assembly 30, wherein the developing assembly includes a developing box and a photosensitive drum box, the developing box includes a powder bin, a developing roller, a powder feeding roller, etc., and the photosensitive drum box includes a photosensitive drum, a charging roller, etc. The developing assembly can be a separate structure of the developing box and the photosensitive drum box, or a one-piece structure of the developing box and the photosensitive drum box. When the developing assembly 40 is installed in the image forming device, when no paper passes, the photosensitive drum 41 in the developing assembly 40 contacts the transfer roller 32 in the paper feeding assembly 30, and when paper passes, the paper is transferred between the photosensitive drum 41 and the transfer roller 32 to complete the transfer process. The fixing assembly 50 is arranged on a side of the paper feeding assembly 30 close to the paper outlet 102, and the output end of the fixing assembly 50 is opposite to the paper outlet 102; an opening for accommodating the LED print head 60 is arranged above the photosensitive drum 41 of the developing assembly 40, and the LED print head 60 can switch between a position close to the photosensitive drum 41 and a position away from the photosensitive drum 41; under the action of the paper feeding assembly 30, the paper entering the paper inlet 101 passes through the embossing area formed by the photosensitive drum 41 and the transfer roller of the developing assembly 40 and is then fed into the fixing assembly 50; the control module 70 and the driving assembly are both arranged in the second installation cavity, the control module 70 is electrically connected to the driving assembly, the developing assembly 40, the fixing assembly 50 and the LED print head 60, and the driving assembly is used to drive the paper feeding assembly 30, the developing assembly 40 and the fixing assembly 50 to operate.

[0061] Working principle: Combination Figure 3 As shown, when printing, paper can be fed into the paper inlet 101 manually or through an external paper box. Driven by the paper feeding assembly 30, the paper first passes through the embossing area formed by the photosensitive drum 41 of the developing assembly 40 and the transfer roller to complete the transfer process, and then passes through the fixing embossing area formed by the contact between the heating roller and the pressure roller in the fixing assembly 50 to complete the fixing process, and then is output from the paper outlet 102.

[0062] It should be noted that if the LED print head 60 is set to be fixed in the shell 10, the user needs operating space to replace the developing component 40 or repair the inside of the equipment, so space must be reserved between the LED print head 60 and the developing component 40, and the LED print head 60 must be spatially away from the photosensitive drum 41 of the developing component 40 (to ensure that it can directly irradiate the photosensitive drum 41). This will increase the size of the printer and is not conducive to miniaturized design.

[0063] In the embodiment of the present application, the image forming device divides the interior of the housing 10 into a first installation cavity and a second installation cavity by a partition 11. The paper feeding assembly 30, the developing assembly 40 and the fixing assembly 50 are all arranged in the first installation cavity, and the control module 70 and the driving assembly are all arranged in the second installation cavity. The LED print head 60 is used to provide exposure for the photosensitive drum 41. The LED print head 60 can switch between a position close to the photosensitive drum 41 and a position far away from the photosensitive drum 41. When it is necessary to replace the developing assembly 40 or to overhaul the interior of the device, the machine cover 20 is opened and the LED print head 60 is switched to a position far away from the photosensitive drum 41. The user will not cause bumps and damage to the LED print head 60 during the process of replacing the developing assembly 40 or overhauling the interior of the device. After the replacement or overhaul is completed, the LED print head 60 is switched to a position close to the photosensitive drum 41 to expose the photosensitive drum 41 during the image forming process. By rationally arranging the internal space of the housing 10, the entire machine is compact in structure, small in size, and easy to carry.

[0064] Furthermore, in order to prevent the control module 70 and the driving assembly located in the second installation cavity from being exposed to the outside after the cover 20 is opened, Figure 1 As shown, a cover plate 15 is disposed on the top of the second installation cavity, and a power button 16 electrically connected to the control module 70 is disposed on the cover plate 15 .

[0065] In one embodiment, if Figure 4-Figure 6As shown, the driving assembly includes a driving motor 81 and a transmission gear set 82. A motor mounting plate 14 is provided on the side of the partition 11 facing the second mounting cavity through a support column. A spacing is provided between the motor mounting plate 14 and the partition 11. The transmission gear set 82 is located in the spacing and is rotatably provided on the partition 11. The transmission gear set 82 includes an input gear shaft 821, a first driving gear 822, a second driving gear 823 and a third driving gear 824 that are meshed with each other. The driving motor 81 is provided on the side of the motor mounting plate 14 away from the partition 11, and the output shaft of the driving motor 81 is connected to the input gear shaft 821. The shaft 821 and the first driving gear 822 are meshed with the end of the paper feed roller 33 in the paper feed assembly 30. Avoidance openings are respectively provided at positions on the partition 11 corresponding to the end of the paper feed roller 33, the second driving gear 823 and the third driving gear 824. The first mounting cavity and the second mounting cavity are connected at the avoidance opening, and are used for, for example, the end of the gear or the paper feed roller 33 to pass through and be connected to other structures. For example, the second driving gear 823 is meshed with the end of the photosensitive drum 41 in the developing assembly 40 at the avoidance opening, and the third driving gear 824 is meshed with the end of the heating roller in the fixing assembly 50 at the avoidance opening.

[0066] The driving motor 81 drives the input gear shaft 821 to rotate, and the input gear shaft 821 drives the first driving gear 822, the second driving gear 823 and the third driving gear 824 to rotate synchronously, thereby realizing the use of a driving motor 81 to cooperate with the transmission gear group 82 to drive the paper feeding assembly 30, the developing assembly 40 and the fixing assembly 50 to operate, thereby saving costs.

[0067] Specifically, the transmission gear group 82 also includes a plurality of intermediate gears and a clutch, the clutch is electrically connected to the control module 70, a paper sensor for monitoring whether there is paper is provided at the paper feed port 101, the paper sensor is electrically connected to the control module 70, and an intermediate gear and a clutch are provided between the input gear shaft 821 and the first drive gear 822, and the clutch is used to transmit the rotational torque output by the input gear shaft 821 to the first drive gear 822 when there is paper at the paper feed port 101.

[0068] In one embodiment, in combination Figure 1 and Figure 13-Figure 14 As shown, a guide groove 200 for the end of the developing assembly 40 to be inserted is provided on the side of the partition 11 facing the first installation cavity and on the side of the inner wall of the first installation cavity opposite to the partition 11 .

[0069] The design of the guide groove 200 improves the installation accuracy of the developing assembly 40 and the stability of the position of the developing assembly 40 after installation. When the developing assembly 40 is installed, the protrusions at both ends of the developing assembly 40 enter the installation position of the first installation cavity along the L-shaped guide groove 200. At the same time, in the first installation cavity, elastic protrusions 300 are provided at both end sides close to the front side of the housing 10 (i.e., the side with the paper inlet 101) to match the position corresponding to the rear side of the developing assembly 40. When the developing assembly 40 moves to the final position through the guide groove 200, the rear side of the developing assembly 40 contacts the elastic protrusion 300 and squeezes the elastic protrusion 300. As the developing assembly 40 continues to move along the guide groove 200, the developing assembly 40 and the elastic protrusion 300 change from the squeezed state to the non-squeezed state. The elastic protrusion 300 can limit the movement of the developing assembly 40 in the up and down directions after installation, and play a limiting role for the developing assembly 40.

[0070] In one embodiment, if Figure 3 and Figure 7 As shown, the paper feeding assembly 30 includes a carrier plate 31, a transfer roller 32 rotatably disposed on the top of the carrier plate 31, and a pair of paper feeding rollers 33 rotatably disposed on the top of the carrier plate 31 and in contact with each other, the carrier plate 31 is disposed at the bottom of the first mounting cavity, the paper feeding roller 33 is opposite to the paper inlet 101, and the transfer roller 32 is in contact with the photosensitive drum 41 in the developing assembly 40.

[0071] In some embodiments, Figure 3 and Figure 7 As shown, the image forming device also includes a bracket 90, one end of which is rotatably connected to the top of the partition 11 toward the side of the first installation cavity, and the bracket 90 can rotate between an inspection position and a working position relative to the shell 10. The LED print head 60 is arranged on the bracket 90. In the process of the bracket 90 rotating from the inspection position to the working position, the bracket 90 drives the LED print head 60 to move from the outside of the shell 10 to the first installation cavity and approach the photosensitive drum 41 in the developing assembly 40; in the process of the bracket 90 rotating from the working position to the inspection position, the bracket 90 drives the LED print head 60 away from the photosensitive drum 41 and moves to the outside of the first installation cavity.

[0072] The LED print head 60 is set on a bracket 90 that is rotatably connected to the top of the partition 11. The bracket 90 can rotate between the maintenance position and the working position relative to the shell 10. According to this arrangement, when the developing component 40 needs to be replaced or the inside of the device needs to be repaired, the machine cover 20 is opened and the bracket 90 is flipped to the maintenance position. At this time, the LED print head 60 is located outside the first installation cavity. The user will not cause bumps and damage to the LED print head 60 during the process of replacing the developing component 40 or repairing the inside of the device. After the replacement or maintenance is completed, the bracket 90 is lowered, and the LED print head 60 is driven to move from outside the first installation cavity to inside the first installation cavity, approaching and finally aligning with the photosensitive drum 41 in the developing component 40, so as to expose the photosensitive drum 41 during the image formation process, and finally the machine cover 20 is closed.

[0073] In some specific embodiments, Figure 1 , Figure 4 , Figure 6 As shown, a hinge seat 12 is provided on the top of the partition 11 facing the first installation cavity, a limiting notch 13 is provided at a position of the inner wall of the first installation cavity opposite to the hinge seat 12, one end of the bracket 90 is hinged to the hinge seat 12, when the bracket 90 is in the working position, the end of the bracket 90 away from the hinge seat 12 is limited in the limiting notch 13, and the axial direction of the LED print head 60 is parallel to the photosensitive drum 41 in the developing assembly 40. When the bracket 90 is in the inspection position, the end of the bracket 90 away from the hinge seat 12 is separated from the limiting notch 13, and the axial extension line of the LED print head 60 and the photosensitive drum 41 intersects.

[0074] By setting the hinge seat 12, the bracket 90 is easy to install, and the limiting notch 13 is used to limit the end of the bracket 90 away from the hinge seat 12, ensuring that the relative position between the LED print head 60 located on the bracket 90 and the photosensitive drum 41 in the developing assembly 40 remains stable during the operation of the image forming device.

[0075] Furthermore, a first clamping portion 131 is provided on the inner wall of the limiting notch 13, and a second clamping portion 91 capable of correspondingly clamping with the first clamping portion 131 is provided at one end of the bracket 90 away from the hinge seat 12. When the bracket 90 is in the working position, the first clamping portion 131 and the second clamping portion 91 are clamped with each other to fix the end of the bracket 90 away from the hinge seat 12 in the limiting notch 13, thereby further improving the reliability and stability of the LED print head 60 on the bracket 90 during the working process.

[0076] Specifically, one of the first clamping portion 131 and the second clamping portion 91 is a clamping slot, and the other is a protrusion adapted to the clamping slot. Exemplarily, the first clamping portion 131 is a notch extending vertically downward, and the second clamping portion 91 is a cylindrical rod. When an external force acts on the bracket 90, the cylindrical rod can be inserted into or pulled out of the notch. It is conceivable that the first clamping portion 131 and the second clamping portion 91 can also have other structural forms, which are not limited here.

[0077] In a specific embodiment, Figure 1 and Fig.15 As shown, the hinge seat 12 includes two side plates 121 arranged at intervals and a fixed plate 122 connected between the two side plates 121. The hinge seat 12 can be made of sheet metal and is U-shaped as a whole. The fixed plate 122 is fixed to the inner wall of the shell 10. A rotating shaft 123 is connected between the two side plates 121. Two hinge ears 901 are arranged at intervals at one end of the bracket 90. The two hinge ears 901 are located between the two side plates 121 and are rotatably connected to the rotating shaft 123. When the bracket 90 is in the maintenance position, one side of the bracket 90 (for example, one side of the top plate) is against the inner side of the fixed plate 122 to keep the bracket 90 stable. Figure 1 As shown, the bracket 90 finally stops at the maintenance position. At this time, the axial angle between the bracket 90 and the photosensitive drum 41 is greater than 90 degrees, which can provide the user with operating space, facilitate the user to remove or install the developing assembly 40 and inspect the inside of the device.

[0078] In addition, to facilitate the control of the cable routing of the LED print head 60, as Figure 15-18 As shown, a wire hole 1221 is provided on the fixing plate 122, and a cable for transmitting data and power signals passes through the wire hole 1221. After passing through the wire hole 1221, the cable is fixed to the inner side of the top plate 92 of the bracket 90, and the cable is arranged close to the inner side of the top plate 92. Preferably, the bracket 90 can rotate, and the width of the cable can be smaller than the distance between the hinge ears 901 to avoid touching the cable when the bracket 90 rotates.

[0079] In one embodiment, if Figure 15-18As shown, the bracket 90 can be a sheet metal part, which is made of a strip metal plate by bending and punching. The bracket 90 includes a top plate 92, a turning plate 93 and a receiving plate 94 connected in sequence. One end of the top plate 92 is rotatably connected to the side of the partition 11 facing the first installation cavity. When the bracket 90 is in the inspection position, one side of the top plate 92 is against the inner side of the fixed plate 122. The bracket 90 is provided with a wiring channel composed of the top plate 92, the receiving plate 94 and the mounting plate 95. The cables for transmitting data and power signals are connected to the LED print head 60 through the wiring channel. Specifically, the receiving plate 94 of the bracket 90 is provided with an opening in the middle position, and the mounting plate 95 is provided with an opening at the corresponding position of the cable socket on the print head. After the cable attached to the inner side of the top plate 92 passes through the opening of the receiving plate 94, it is connected to the wiring socket (cable socket) of the LED print head 60 at the opening position of the mounting plate 95.

[0080] Preferably, the bracket 90 can be made of sheet metal, which is easy to process and has a high structural strength. In addition, it occupies less space, which facilitates the miniaturization and portable design of the image forming device.

[0081] Specifically, there are acute angles between the turning plate 93 and the receiving plate 94 and between the turning plate 93 and the top plate 92. When in the working position, the top plate 92 is horizontal, and the LED print head 60 located on the receiving plate 94 is obliquely placed into the photosensitive port on the developing assembly 40 (i.e., the opening 42 above the photosensitive drum 41), and faces the photosensitive drum 41 in the developing assembly 40.

[0082] Of course, in other embodiments, the bracket 90 may also be integrally formed by plastic injection molding.

[0083] In a specific embodiment, Figure 1 and Figure 8 As shown, the developing assembly 40 is provided with an opening 42 for inserting the LED print head 60, and both ends of the developing assembly 40 in the length direction are provided with a support 43 for supporting both ends of the LED print head 60 in the length direction. The support 43 limits the depth of the LED print head 60 inserted into the opening 42, ensuring that the distance between the LED print head 60 and the photosensitive drum 41 remains constant each time the bracket 90 switches to the working position.

[0084] Specifically, combined Figure 8 and Fig.18As shown, when the bracket 90 is switched to the working position, the first clamping portion 131 of the housing 10 and the second clamping portion 91 of the bracket 90 are mutually clamped, which will cause the spring 96 between the mounting plate 95 and the receiving plate 94 of the bracket 90 to be compressed, so that the two ends of the LED print head 60 are pressed against the support platform 43. Finally, the LED print head 60 is in close and gapless contact with the support platform 43 on the developing assembly 40, thereby achieving a positioning accuracy of tens of microns between the LED print head 60 and the photosensitive drum 41.

[0085] For example, Figure 16-Figure 18 As shown, there is an end edge portion 602 on the LED print head 60 located in the end portion extension direction of the folding surface portion 601, and the end edge portion 602 abuts against the support platform 43. Optionally, the support platform 43 can be provided with a notch to accommodate the convex portion 603 of the end of the LED print head 60, so that the plane 604 at the rear of the end edge portion 602 of the LED print head 60 can also abut against the support platform 43, increasing the contact area between the end of the LED print head 60 and the support platform 43, and ensuring the structural strength, wherein the end edge portion 602 and the plane 604 are coplanar.

[0086] In one embodiment, if Fig.18 As shown, the LED print head 60 is elastically connected to the bracket 90, and the LED print head 60 is detachably mounted on the mounting plate 95. For example, through holes are set at both ends of the LED print head 60, and threaded holes are correspondingly set on the mounting plate 95. The screws pass through the through holes and enter the threaded holes to achieve the fixed connection between the LED print head 60 and the mounting plate 95. Specifically, in one implementation, a plurality of pins 98 are fixedly connected to the mounting plate 95 or are an integral part, and a plurality of through holes are arranged at intervals along the length direction of the receiving plate 94 of the bracket 90. The plurality of pins 98 can pass through the plurality of through holes. A stopper 97 having a size larger than the inner diameter of the through hole is provided at the end of the pin 98, thereby connecting the receiving plate 94 with the mounting plate 95. A spring 96 is sleeved on the pin 98, and the two ends of the spring 96 elastically press against the mounting plate 95 and the receiving plate 94, respectively, thereby achieving the elastic connection between the mounting plate 95 and the receiving plate 94. Preferably, the number of the pins 98 can be two, and the number of the through holes can also be two. The pin shaft 98 can be respectively arranged at the two ends of the mounting plate 95 in the length direction, and correspondingly, the through holes can be respectively arranged at the two ends of the receiving plate 94 in the length direction.

[0087] Thus, when the bracket 90 is in the inspection position, the spring 96 between the mounting plate 95 and the receiving plate 94 of the bracket 90 is in a free state. When replacing the developing assembly 40 or inspecting the image forming device, if the LED print head 60 is accidentally hit, the elastic structure between the LED print head 60 and the bracket 90 can play a certain role in buffering and shock absorption, thereby reducing the probability of damage to the LED print head 60. In addition, when the bracket 90 is rotated from the inspection position to the working position, the two ends or edges of the LED print head 60 are prevented from hard contact with the opening 42 on the developing assembly 40, thereby preventing the LED print head 60 from being damaged.

[0088] Of course, the elastic connection between the LED print head 60 and the bracket 90 may also have other structural forms, which are not limited here.

[0089] In other embodiments, Fig.10 and Fig.12 As shown, the image forming device also includes a connecting rod mechanism 100, and the LED print head 60 is connected to the inner side of the machine cover 20 through the connecting rod mechanism 100. When the machine cover 20 is switched from an open position to a closed position, the connecting rod mechanism 100 drives the LED print head 60 to approach the photosensitive drum 41 in the developing assembly 40; when the machine cover 20 is switched from a closed position to an open position, the connecting rod mechanism 100 drives the LED print head 60 away from the photosensitive drum 41.

[0090] The LED print head 60 is connected to the inner side of the cover 20 through the connecting rod mechanism 100. When the cover 20 is switched from the open position to the closed position, the connecting rod mechanism 100 drives the LED print head 60 to be placed into the first installation cavity through the opening at the top of the housing 10 and finally close to the photosensitive drum 41 in the developing assembly 40; when the cover 20 is switched from the closed position to the open position, the LED print head 60 is driven away from the photosensitive drum 41 by the connecting rod mechanism 100. According to this arrangement, after the cover 20 is opened, the LED print head 60 is retracted, and the LED print head 60 will not be damaged by collision when the user replaces the developing assembly 40. After the developing assembly 40 is replaced, when the cover 20 is lowered, the LED print head 60 falls into the first installation cavity under the action of the connecting rod mechanism 100 as the cover 20 is closed, and approaches and finally aligns with the photosensitive drum 41, so as to expose the photosensitive drum 41 during the image formation process.

[0091] In some specific embodiments, during the process of switching the machine cover 20 from a closed position to an open position, the connecting rod mechanism 100 drives the LED print head 60 away from the photosensitive drum 41 and finally adheres to the inner side of the machine cover 20, and the length direction of the LED print head 60 is always parallel to the axial direction of the photosensitive drum 41 in the developing assembly 40.

[0092] With this design, a larger space can be reserved above the opening, so that it is not easy to collide with the LED print head 60 during the process of replacing the developing assembly 40.

[0093] like Figure 10-12 As shown, when the cover 20 switches between the open position and the closed position, the length direction of the LED print head 60 is always parallel to the axial direction of the photosensitive drum 41 in the developing assembly 40.

[0094] Specifically, the cover 20 is hinged to one side of the top opening of the housing 10 by a hinge, and the rotation axis of the cover 20 relative to the housing 10, the length direction of the LED print head 60 and the axis of the photosensitive drum 41 are parallel to each other.

[0095] It should be noted that the length direction (also referred to as the “main scanning direction”) of the LED print head 60 is parallel to the axis of the photosensitive drum 41. The LED print head 60 generally includes: an LED array, a rod lens array, and a housing as a supporting component, the housing being configured to support the LED array and the rod lens array, and the rod lens array being configured to map the light emitted by the LED array onto the photosensitive drum 41.

[0096] In some specific embodiments, Fig.10 and Fig.11 As shown, the connecting rod mechanism 100 includes a swing arm 110 and a connecting rod 120. One end of the swing arm 110 is hinged to the inner side of the machine cover 20, and the other end of the swing arm 110 is connected to the LED print head 60. One end of the connecting rod 120 is hinged to the shell 10, and the hinge is close to the hinge between the shell 10 and the machine cover 20. The other end of the connecting rod 120 is hinged to the swing arm 110.

[0097] According to the above arrangement, during the opening process of the machine cover 20, the LED print head 60 is lifted upwards driven by the swing arm 110, and gradually approaches the inner wall of the machine cover 20 under the action of the connecting rod 120; during the lowering process of the machine cover 20, the LED print head 60 falls and falls into the first installation cavity under the joint action of the connecting rod 120 and the swing arm 110, and is finally positioned to align with the photosensitive drum 41.

[0098] In a specific embodiment, Fig.10 As shown, the inner side of the housing 10 is provided with ribs, and one end of the connecting rod 120 away from the swing arm 110 is hinged to the ribs. According to this design, the ribs can not only enhance the strength of the housing 10, but also serve as a mounting carrier for the connecting rod 120.

[0099] like Figure 10-11As shown, the swing arm 110 includes a mounting bar 111 and a connecting rod 112 connected to the mounting bar 111, one end of the connecting rod 112 away from the mounting bar 111 is hinged to the inner side of the machine cover 20, the LED print head 60 is installed on the mounting bar 111 along the length direction of the mounting bar 111, the LED print head 60 remains parallel to the photosensitive drum 41 in the developing assembly 40, and the end of the connecting rod 120 away from the shell 10 is hinged to the end of the connecting rod 112 close to the mounting bar 111. Specifically, the connecting rod 112, the connecting rod 120 cooperate with the machine cover 20 and the shell 10 to form a four-bar linkage.

[0100] The mounting bar 111 is provided with a notch, and a cable is connected to the LED print head 60 through the notch for controlling and supplying power to the LED print head 60 .

[0101] Furthermore, in order to improve the reliability and stability of the connection between the swing arm 110 and the inner side of the hood 20, the swing arm 110 includes at least two connecting rods 112, and the at least two connecting rods 112 are spaced apart in the length direction of the mounting bar 111, and the end of the connecting rod 120 away from the shell 10 is hinged to the end of one of the connecting rods 112 close to the mounting bar 111.

[0102] To facilitate manufacturing, the mounting bar 111 and the connecting rod 112 are an integrated structure and can be integrally formed by plastic injection molding.

[0103] In a specific embodiment, the LED print head 60 is detachably mounted on the mounting bar 111 , and this design facilitates the later replacement and maintenance of the LED print head 60 .

[0104] Specifically, the LED print head 60 can be mounted on the mounting bar 111 by means of a snap-fit ​​structure or screws.

[0105] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0106] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An image forming device, characterized in that: The invention comprises a housing, a cover, a paper feeding assembly, a fixing assembly, an LED print head, a control module and a driving assembly; the housing is provided with an opening at the top, and the cover is arranged at the top of the housing for opening or closing the opening; the housing is provided with a partition for dividing the interior of the housing into a first installation cavity and a second installation cavity; the front side of the first installation cavity is provided with a paper feed port, the rear side of the first installation cavity is provided with a paper outlet port, and the height difference between the paper feed port and the paper outlet port relative to the bottom surface of the housing is within 2 cm; The paper feeding assembly is arranged flatly at the bottom of the first installation cavity, the developing assembly is detachably arranged above the paper feeding assembly, the fixing assembly is arranged on a side of the paper feeding assembly close to the paper outlet, and the output end of the fixing assembly faces the paper outlet; an opening for accommodating the LED print head is arranged above the photosensitive drum of the developing assembly, and the LED print head can switch between a position close to the photosensitive drum and a position away from the photosensitive drum; A control module and a driving assembly are arranged in the second installation cavity. The control module is electrically connected to the driving assembly, the developing assembly, the fixing assembly, and the LED print head. The driving assembly is used to drive the paper feeding assembly, the developing assembly, and the fixing assembly.

2. The image forming apparatus according to claim 1, wherein: The height difference between the paper inlet and the paper outlet relative to the bottom surface of the shell body is within 1 cm.

3. The image forming apparatus according to claim 1, wherein: The driving assembly includes a driving motor and a transmission gear set. A motor mounting plate is provided on the side of the partition facing the second mounting cavity through a supporting column. A gap is provided between the motor mounting plate and the partition. The transmission gear set is located within the gap and is rotatably provided on the partition. The transmission gear set includes an input gear shaft, a first driving gear, a second driving gear and a third driving gear that are meshed with each other. The driving motor is provided on the side of the motor mounting plate away from the partition, and the output shaft of the driving motor is connected to the input gear shaft. The first driving gear is meshed with the end of the paper feeding roller in the paper feeding assembly. A clearance is provided on the partition at positions corresponding to the end of the paper feeding roller, the second driving gear and the third driving gear. The second driving gear is meshed with the end of the photosensitive drum in the developing assembly, and the third driving gear is meshed with the end of the heating roller in the fixing assembly.

4. The image forming apparatus according to claim 1, wherein: A side of the partition facing the first installation cavity and a side of the inner wall of the first installation cavity opposite to the partition are both provided with a guide groove for the end of the developing assembly to be inserted into.

5. The image forming apparatus according to claim 1, wherein: The paper feeding assembly includes a supporting plate, a transfer roller rotatably arranged on the top of the supporting plate, and a pair of paper feeding rollers rotatably arranged on the top of the supporting plate and contacting each other, the supporting plate is arranged at the bottom of the first mounting cavity, and the paper feeding rollers are opposite to the paper inlet.

6. The image forming apparatus according to claim 1, wherein: A cover plate is disposed on the top of the second installation cavity, and a power button electrically connected to the control module is disposed on the cover plate.

7. The image forming device according to any one of claims 1 to 6, characterized in that: The image forming device also includes a bracket, one end of which is rotatably connected to the top of the partition toward one side of the first mounting cavity, and the bracket can be rotated relative to the shell between an inspection position and a working position. The LED print head is arranged on the bracket, and during the process of the bracket rotating from the inspection position to the working position, the bracket drives the LED print head to move from outside the shell to inside the first mounting cavity and close to the photosensitive drum; during the process of the bracket rotating from the working position to the inspection position, the bracket drives the LED print head away from the photosensitive drum and moves to outside the first mounting cavity.

8. The image forming apparatus according to claim 7, wherein: A hinge seat is provided on the side of the top of the partition facing the first installation cavity, and a limiting notch is provided on the inner wall of the first installation cavity at a position opposite to the hinge seat. One end of the bracket is hinged to the hinge seat. When the bracket is in the working position, the end of the bracket away from the hinge seat is limited in the limiting notch, and the LED print head is parallel to the axial direction of the photosensitive drum in the developing assembly; when the bracket is in the inspection position, the end of the bracket away from the hinge seat is disengaged from the limiting notch.

9. The image forming apparatus according to claim 7, wherein: The developing assembly is provided with an opening for placing the LED print head, and both end covers in the length direction of the developing assembly are provided with a support for supporting both ends of the LED print head in the length direction.

10. The image forming apparatus according to any one of claims 1 to 6, characterized in that: The image forming device also includes a connecting rod mechanism, and the LED print head is connected to the inner side of the machine cover through the connecting rod mechanism. When the machine cover is switched from the open position to the closed position, the connecting rod mechanism drives the LED print head close to the photosensitive drum in the developing assembly; when the machine cover is switched from the closed position to the open position, the connecting rod mechanism drives the LED print head away from the photosensitive drum.

11. The image forming apparatus according to claim 10, wherein: During the process of the machine cover switching from the closed position to the open position, the connecting rod mechanism drives the LED print head away from the photosensitive drum and finally adheres to the inner side of the machine cover, and the length direction of the LED print head is always parallel to the axial direction of the photosensitive drum in the developing assembly.

12. The image forming apparatus according to claim 10, wherein: The connecting rod mechanism includes a swing arm and a connecting rod, one end of the swing arm is hinged to the inner side of the machine cover, the other end of the swing arm is connected to the LED print head, one end of the connecting rod is hinged to the shell, the hinge is close to the hinge between the shell and the machine cover, and the other end of the connecting rod is hinged to the swing arm.

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