Image forming apparatus

Abstract

The invention belongs to the field of printing products, and particularly relates to image forming equipment which is characterized in that an LED printing head is arranged on a support rotationally connected with the inner wall of a shell, and in the process that the support rotates to a working position from a maintenance position, the support drives the LED printing head to move into the shell from the outside of the shell and get close to a photosensitive drum in a processing box; in the process that the support rotates from the working position to the overhaul position, the support drives the LED printing head to be away from the processing box. When the processing box needs to be replaced or the interior of the machine body needs to be overhauled, the machine cover is opened, the support is overturned to the overhauling position, at the moment, the LED printing head is located outside the shell, the LED printing head cannot be collided and damaged in the process that a user replaces the processing box or overhauls the interior of the machine body, and after replacement or overhauling is completed, the LED printing head is not damaged in the process that the support is put down. And the LED printing head is driven to move from the outside of the shell to the inside of the shell, and is close to and finally aligned with a photosensitive drum in the processing box.

Description

Technical Field

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

[0002] The light sources of image forming devices (such as printers or digital copiers) are currently commonly used in two types: lasers and LED print heads. Among them, lasers use laser light sources. The laser beam emitted by the light source is deflected by a deflection mirror and refracted by a lens, and then irradiated onto the photosensitive drum to form a point beam. The print signal is modulated on the beam. The beam irradiates the photosensitive drum, and an electrostatic latent image is formed where there is a print signal. After charging and adsorbing toner, the print image is transferred and fixed. The LED print head is different from the laser principle. The LED print head is a light bar composed of multiple LED light sources arranged in an array, and each physical pixel corresponds to a light-emitting diode. Under the control of the print signal, the light-emitting diode corresponding to the part to be printed is lit, and the generated light is directly projected onto the surface of the photosensitive drum through the focusing head to complete the photosensitive process.

[0003] Since the laser needs to pass through multiple optical components such as deflection mirrors and lenses to generate a single-point beam, the optical path is long, and the laser beam is easily affected by the environment, so the laser is fixed in the printer body, which takes up a large space in the printer. At the same time, a high-power laser source must be used to ensure that the laser beam can still focus on the surface of the photosensitive drum after passing through a long optical path. The LED print head is smaller in size and suitable for portable image forming equipment. The LED print head is a solid light source composed of thousands of independent light-emitting components, such as light-emitting diodes. The single-point beam generated by a single LED light-emitting diode has low power, which requires the LED print head to be arranged close to the surface of the photosensitive drum. This design is easy to cause collision damage to the LED print head during the replacement of the toner cartridge, affecting the performance and service life of the LED print head. Summary of the invention

[0004] The embodiment of the present application provides an image forming device, which is used to solve the technical problem that in the process of replacing the toner cartridge in the existing image forming device, the LED print head is easily damaged by collision, thereby affecting the performance and service life of the LED print head.

[0005] To achieve the above-mentioned purpose, the present application provides an image forming device, including a body, a cover, a bracket and an LED print head; the body includes a shell with a top opening, and a processing box can be detachably installed in the shell; the cover is arranged at the top of the shell, and is used to open or close the opening; one end of the bracket is rotatably connected to one side of the inner wall of the shell, and the bracket can rotate between a maintenance position and a working position relative to the shell, and the LED print head is arranged on the bracket. During the process of the bracket rotating from the maintenance position to the working position, the bracket drives the LED print head close to the photosensitive drum in the processing box; during the process of the bracket rotating from the working position to the maintenance position, the bracket drives the LED print head away from the photosensitive drum in the processing box.

[0006] Optionally, 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 shell. When the bracket is in the working position, the bracket and the LED print head are located inside the shell and do not protrude from the opening.

[0007] Optionally, a hinge seat and a limit notch are relatively arranged at the upper portion of the shell, and the positions of the hinge seat and the limit notch are higher than the processing box; one end of the bracket is hinged to the hinge seat, and when the bracket is in the working position, one end of the bracket away from the hinge seat is limited in the limit notch, and the LED print head is basically parallel to the axial direction of the photosensitive drum in the processing box.

[0008] Optionally, a first clamping portion is provided on an inner wall of the limiting notch, and a second clamping portion capable of correspondingly clamping with the first clamping portion is provided at one end of the bracket away from the hinge seat.

[0009] Optionally, one of the first clamping portion and the second clamping portion is a clamping slot, and the other is a protrusion adapted to the clamping slot.

[0010] Optionally, the hinge seat includes two side panels arranged at intervals and a fixed plate connected between the two side panels, the fixed plate is fixed to the inner wall of the opening, a rotating shaft is connected between the two side panels, and hinge ears are arranged at intervals at one end of the bracket, the hinge ears are located between the two side panels and are rotatably connected to the rotating shaft.

[0011] Optionally, the fixing plate is provided with a wire hole, and cables for transmitting data and power signals pass through the wire hole.

[0012] Optionally, the processing box is provided with an opening for inserting the LED print head, and both end covers in the length direction of the processing box are provided with a support for supporting the two end parts in the length direction of the LED print head.

[0013] Optionally, the support platform is provided with a notch, and the notch is used to accommodate the protrusions at both ends of the LED print head to increase the contact area between the support platform and the end of the print head.

[0014] Optionally, the LED print head is elastically connected to the bracket.

[0015] Optionally, the bracket includes a top plate, a turning plate and a receiving plate connected in sequence, one end of the top plate is rotatably connected to one side of the inner wall of the shell, and when the bracket is in the inspection position, one side of the top plate is against the inner side of the shell.

[0016] Optionally, the print head is installed on a mounting plate, and a plurality of through holes are arranged on the supporting plate of the bracket at intervals along its length direction, and a pin is movably inserted in each of the through holes, one end of the pin is connected to the mounting plate, and the other end of the pin is provided with a limit head whose size is larger than the inner diameter of the through hole, and a spring is sleeved on the pin, and the two ends of the spring are elastically pressed against the mounting plate and the supporting plate respectively.

[0017] Optionally, an opening is provided on the receiving plate, and openings are provided at positions corresponding to the cable sockets on the mounting plate and the print head. Cables for transmitting data and power signals pass through the space between the top plate and the receiving plate, and in turn pass through the openings on the receiving plate and the mounting plate to be connected to the cable socket on the print head.

[0018] The beneficial effect of the image forming device provided by the present application is that compared with the prior art, the image forming device of the present application sets the LED print head on a bracket rotatably connected to the inner wall of the shell, and the bracket can rotate relative to the shell between a maintenance position and a working position. In the process of the bracket rotating from the maintenance position to the working position, the bracket drives the LED print head to move from outside the shell to inside the shell and approach the photosensitive drum in the processing box; in the process of the bracket rotating from the working position to the maintenance position, the bracket drives the LED print head away from the processing box and moves to the outside of the shell.

[0019] With this arrangement, when it is necessary to replace the processing cartridge or to inspect the inside of the machine body, the machine cover is opened and the bracket is flipped to the inspection position. At this time, the LED print head is outside the shell, and the user will not cause bumps or damage to the LED print head during the process of replacing the processing cartridge or inspecting the inside of the machine body. After the replacement or inspection is completed, when the bracket is lowered, the LED print head is driven to move from outside the shell to inside the shell, approaching and finally aligning with the photosensitive drum in the processing cartridge, so as to expose the photosensitive drum during the image formation process, and finally the machine cover can be closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] in:

[0022] Figure 1 is a schematic structural diagram of an image forming device in an embodiment of the present application when a cover is opened and a bracket is in an inspection position;

[0023] Figure 2 is a structural schematic diagram of an image forming device shown in an embodiment of the present application when the cover is open and the bracket is in the working position;

[0024] Figure 3 is a schematic cross-sectional structural diagram of an image forming device shown in an embodiment of the present application when the cover is closed and the bracket is in the working position;

[0025] Figure 4 It is a schematic diagram of the connection between the bracket and the hinge seat when the bracket in the image forming device is in the inspection position shown in one embodiment of the present application;

[0026] Figure 5 is a structural schematic diagram of a hinge seat in an image forming device shown in an embodiment of the present application;

[0027] Figure 6 It is a schematic diagram of the structure of a limiting notch on the inner wall of a housing in an image forming device shown in one embodiment of the present application;

[0028] Figure 7 It is a schematic diagram of the connection between a bracket and an LED print head in an image forming device shown in an embodiment of the present application;

[0029] Figure 8 It is a schematic diagram of the end of an LED print head in an image forming device shown in an embodiment of the present application;

[0030] Fig. 9 It is a side view schematic diagram of the connection between a bracket and an LED print head in an image forming device shown in an embodiment of the present application;

[0031] Fig.10 It is a schematic diagram of the structure of a processing box in an image forming device shown in one embodiment of the present application.

[0032] Description of main component symbols:

[0033] 10. machine body; 11. housing; 111. opening; 1111. position limiting notch; 11111. first clamping portion; 12. process cartridge; 1201. photosensitive port; 12011. support platform; 121. photosensitive drum;

[0034] 20. Engine cover;

[0035] 30. Bracket; 301. Articulated ear; 302. Second clamping portion; 31. Top plate; 32. Turning plate; 33. Attaching plate;

[0036] 40, LED print head; 401, folding surface; 402, end edge; 403, convex part; 404, plane;

[0037] 50, hinge seat; 51, side plate; 52, fixed plate; 521, wire hole; 53, rotating shaft;

[0038] 60. Pin; 61. Limiting head;

[0039] 70. Spring;

[0040] 80. Mounting plate. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In the description of the present application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0044] 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.

[0045] 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.

[0046] As described in the background technology, the single-point light beam power generated by a single LED light-emitting diode in an LED printer is relatively small. In order to ensure printing quality, reduce beam attenuation, and also to reduce the size of the printer, the LED print head needs to be arranged closer to the surface of the photosensitive drum. This design can easily cause collision damage to the LED print head during internal inspection of the machine body or replacement of the toner cartridge, affecting the performance and service life of the LED print head.

[0047] In order to solve the above problems, an embodiment of the present application provides an image forming device, such as Figure 1-Figure 3 As shown, the image forming device includes a body 10, a cover 20, a bracket 30 and an LED print head 40. The body 10 includes a housing 11 with an opening 111 at the top. It can be understood that a processing box 12, a fixing module, a paper conveying module, etc. are arranged inside the housing 11. The processing box 12 can be detachably installed in the housing 11. The processing box 12 includes a developing box and a drum box. The developing box and the drum box are split or integrated structures (such as Fig.10 As shown in FIG. 1 , the developing box includes a developing roller and a toner bin, and the drum box includes a photosensitive drum 121. It can be understood that when the toner inside the processing box 12 is exhausted, it needs to be replaced; the cover 20 is arranged on the top of the shell 11, and is used to open or close the opening 111; one end of the bracket 30 is rotatably connected to one side of the inner wall of the shell 11, and the bracket 30 can be relative to the shell 11 in the inspection position (such as Figure 1 as shown) and working position (as Figure 2 and Figure 3 The LED print head 40 is arranged on the bracket 30. When the bracket 30 rotates from the inspection position to the working position, the bracket 30 drives the LED print head 40 to move from the outside of the housing 11 to the inside of the housing 11 and close to the photosensitive drum 121 in the processing box 12; when the bracket 30 rotates from the working position to the inspection position, the bracket 30 drives the LED print head 40 away from the photosensitive drum 121 in the processing box 12 and moves to the outside of the housing 11. The inspection position can also be called the open position. The processing box can be replaced or the device can be inspected at the inspection position.

[0048] The image forming device sets the LED print head 40 on a bracket 30 rotatably connected to the inner wall of the housing 11, and the bracket 30 can rotate between the inspection position and the working position relative to the housing 11. According to this arrangement, when it is necessary to replace the process cartridge 12 or inspect the inside of the machine body 10, the machine cover 20 is opened and the bracket 30 is turned over to the inspection position, such as Figure 1 As shown, at this time, the LED print head 40 is located outside the shell 11, and the user will not cause bumps and damage to the LED print head 40 during the process of replacing the processing box 12 or repairing the inside of the body 10. After the replacement or repair is completed, when the bracket 30 is lowered, the LED print head 40 is driven to move from outside the shell 11 to inside the shell 11, approaching and finally aligning with the photosensitive drum 121 in the processing box 12, so as to expose the photosensitive drum 121 during the image formation process, and finally the machine cover 20 can be closed.

[0049] Furthermore, if Figure 2 and Figure 3 As shown, when the bracket 30 is in the working position, the bracket 30 is located in the housing 11 and does not protrude from the opening 111. This arrangement makes the entire image forming device more compact, and the volume can be designed to be smaller, which is convenient for carrying; in addition, the top of the entire body 10 is flush, ensuring that the opening 111 can be tightly covered by the cover 20.

[0050] In some embodiments, Figure 1 and Figure 2 As shown, ribs are further provided on the inner side of the machine cover 20, and the strength of the machine cover 20 is enhanced by the ribs.

[0051] In one embodiment, if Figure 1-Figure 2 , Figure 4 and Figure 6 As shown, the upper part of the housing 11 is relatively provided with an articulated seat 50 and a limiting notch 1111, and the positions of the articulated seat 50 and the limiting notch 1111 are higher than the processing box 12. One end of the bracket 30 is hinged to the articulated seat 50, and when the bracket 30 is in the working position, the end of the bracket 30 away from the articulated seat 50 is limited in the limiting notch 1111, and the length direction of the LED print head 40 is substantially parallel to the axial direction of the photosensitive drum 121 in the processing box 12.

[0052] It can be understood that the length direction (also referred to as the "main scanning direction") of the LED print head 40 is parallel to the axis of the photosensitive drum 121. The LED print head 40 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, the rod lens array being configured to map the light emitted by the LED array onto the photosensitive drum 121. The length of the bracket 30 is greater than the length of the photosensitive drum 121 in the axial direction.

[0053] By setting the hinge seat 50, it is convenient to install the bracket 30 on the inner wall of the shell 11, and the limiting notch 1111 is used to limit the end of the bracket 30 away from the hinge seat 50, ensuring that the relative position between the LED print head 40 located on the bracket 30 and the photosensitive drum 121 in the processing box 12 remains stable during the operation of the image forming device.

[0054] Furthermore, a first clamping portion 11111 is provided on the inner wall of the limiting notch 1111, and a second clamping portion 302 is provided at one end of the bracket 30 away from the hinge seat 50, which can be correspondingly clamped with the first clamping portion 11111. When the bracket 30 is in the working position, the first clamping portion 11111 and the second clamping portion 302 are mutually clamped to fix the end of the bracket 30 away from the hinge seat 50 in the limiting notch 1111, thereby further improving the reliability and stability of the LED print head 40 on the bracket 30 during the working process.

[0055] Specifically, one of the first clamping portion 11111 and the second clamping portion 302 is a clamping slot, and the other is a protrusion adapted to the clamping slot. Exemplarily, the first clamping portion 11111 is a notch extending vertically downward, and the second clamping portion 302 is a cylindrical rod. When an external force acts on the bracket 30, the cylindrical rod can be inserted into or pulled out of the notch. It is conceivable that the first clamping portion 11111 and the second clamping portion 302 can also have other structural forms, which are not limited here.

[0056] In a specific embodiment, Figure 4-Figure 5 , Figure 7-Figure 9 As shown, the hinge seat 50 includes two side plates 51 arranged at intervals and a fixed plate 52 connected between the two side plates 51. The hinge seat 50 can be made of sheet metal and is U-shaped as a whole. The fixed plate 52 is fixed to the inner wall of the shell 11. A rotating shaft 53 is connected between the two side plates 51. Two hinge ears 301 are arranged at intervals at one end of the bracket 30. The two hinge ears 301 are located between the two side plates 51 and are rotatably connected to the rotating shaft 53. When the bracket 30 is in the maintenance position, one side of the bracket (such as the top plate) is against the inner side of the fixed plate 52 to keep the bracket stable. Figure 1 As shown, the bracket 30 is restricted from rotating toward the side away from the opening 111, so that the bracket 30 finally stops at the maintenance position. At this time, the axial angle between the bracket 30 and the photosensitive drum 121 is greater than 90 degrees, and the opening 111 is unobstructed, which can provide users with operating space, making it convenient for users to remove or install the processing box 12 and inspect the inside of the body 10.

[0057] In addition, to facilitate the control of the cable routing of the LED print head 40, as Figure 4-Figure 5 , Fig. 9As shown, the fixing plate 52 is provided with a wire hole 521, and the cables for transmitting data and power signals pass through the wire hole 521. After passing through the wire hole 521, the cables are fixed to the inner side of the bracket top plate 31 ( Fig. 9 The cable is arranged close to the inner side of the top plate 31. Preferably, the bracket can rotate, and the width of the cable can be smaller than the distance between the hinge ears to avoid touching the cable when the bracket rotates.

[0058] In one embodiment, if Figure 7-Figure 9 As shown, the bracket 30 can be a sheet metal part, which is made of a strip metal plate by bending and punching. The bracket 30 includes a top plate 31, a turning plate 32 and a receiving plate 33 connected in sequence. One end of the top plate 31 is rotatably connected to one side of the inner wall of the housing 11. When the bracket 30 is in the maintenance position, one side of the top plate 31 is against the inner side of the housing 11. The bracket 30 is provided with a wiring channel composed of the top plate 31, the receiving plate 33 and the mounting plate 80. The cables for transmitting data and power signals are connected to the LED print head through the wiring channel. Specifically, the receiving plate 33 of the bracket 30 is provided with an opening in the middle position, and the mounting plate 80 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 31 passes through the opening of the receiving plate 33, it is connected to the wiring socket (cable socket) of the print head 40 at the opening position of the mounting plate 80.

[0059] Preferably, the bracket 30 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.

[0060] Specifically, there are acute angles between the turning plate 32 and the receiving plate 33 and between the turning plate 32 and the top plate 31. When in the working position, the top plate 31 is horizontal, and the LED print head 40 located on the receiving plate 33 is obliquely placed into the photosensitive port on the processing box 12 (i.e., the opening above the photosensitive drum in the processing box), and faces the photosensitive drum 121 in the processing box 12.

[0061] Of course, in other embodiments, the bracket 30 may also be integrally formed by plastic injection molding.

[0062] In a specific embodiment, Figure 4 , Figure 6 and Fig.10 As shown, the processing box 12 is provided with a photosensitive port 1201 for the LED print head 40 to be placed, and both ends of the processing box in the length direction are provided with a support 12011 for supporting both ends of the LED print head 40 in the length direction. The support 12011 limits the depth of the LED print head 40 placed in the photosensitive port 1201, ensuring that the distance between the LED print head 40 and the photosensitive drum 121 remains constant each time the bracket 30 switches to the working position.

[0063] Specifically, Figure 1 , Figure 3 and Figure 8-Figure 10 As shown, when the bracket 30 is switched to the working position, the first clamping portion 11111 of the housing 11 and the second clamping portion 302 of the bracket 30 are mutually clamped, which will compress the spring 70 between the mounting plate 80 and the receiving plate 33 of the bracket 30, so that the two ends of the LED print head 40 are pressed against the support 12011. Finally, the LED print head 40 is in close and gapless contact with the support 12011 on the processing box 12, thereby achieving a positioning accuracy of tens of microns between the LED print head and the photosensitive drum.

[0064] For example, Figure 8-Figure 10 As shown, there is an end edge portion 402 on the LED print head 40 located in the end portion extension direction of the folding surface portion 401, and the end edge portion 402 abuts against the support platform 12011. Optionally, the support platform 12011 can be provided with a notch for accommodating the protrusion 403 of the end portion of the LED print head 40, so that the plane 404 at the rear of the end edge portion 402 of the LED print head 40 can also abut against the support platform 12011, increasing the contact area between the end of the LED print head 40 and the support platform, and ensuring the structural strength, wherein the end edge portion 402 and the plane 404 are coplanar.

[0065] In one embodiment, if Figure 1 , Figure 3 and Fig. 9 As shown, the LED print head 40 is elastically connected to the bracket 30, and the LED print head 40 is detachably mounted on the mounting plate 80. For example, through holes are set at both ends of the print head 40, and threaded holes are correspondingly set on the mounting plate 80. The screws pass through the through holes and enter the threaded holes to realize the fixed connection between the LED print head 40 and the mounting plate 80. Specifically, in one implementation, a plurality of pins 60 are fixedly connected to the mounting plate 80 or are an integral part, and a plurality of through holes are arranged at intervals along the length direction of the receiving plate 33 of the bracket 30. The plurality of pins 60 can pass through the plurality of through holes. A stopper 61 having a size larger than the inner diameter of the through hole is provided at the end of the pin 60, so as to connect the receiving plate 33 with the mounting plate 80. A spring 70 is sleeved on the pin 60, and the two ends of the spring 70 elastically press against the mounting plate 80 and the receiving plate 33, respectively, so as to realize the elastic connection between the mounting plate 80 and the receiving plate 33. Preferably, the number of the pins 60 can be two, and the number of the through holes can also be two. The pin shaft 60 can be respectively arranged at the two ends of the mounting plate 80 in the length direction, and correspondingly, the through holes can be respectively arranged at the two ends of the receiving plate 33 in the length direction.

[0066] Thus, when the bracket 30 is in the inspection position, the spring 70 between the mounting plate 80 and the receiving plate 33 of the bracket 30 is in a free state. When replacing the process cartridge or inspecting the image forming device, if the LED print head 40 is accidentally hit, the elastic structure between the LED print head 40 and the bracket 30 can play a certain role in buffering and shock absorption, thereby reducing the probability of damage to the LED print head 40. In addition, when the bracket 30 is rotated from the inspection position to the working position, the two ends or edges of the LED print head 40 are prevented from hard contact with the vicinity of the photosensitive port 1201 on the process cartridge 12, thereby preventing the LED print head 40 from being damaged.

[0067] Of course, the elastic connection between the LED print head 40 and the bracket 30 may also have other structural forms, which are not limited here.

[0068] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not 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. The above embodiments only express several implementation methods of the present application, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the application. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, several deformations and improvements can be made, which all belong to the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the attached claims.

Claims

1. An image forming device, characterized in that: The machine comprises a body, a cover, a bracket and an LED print head; the body comprises a shell with a top opening, and the processing box can be detachably installed in the shell; the cover is arranged on the top of the shell, and is used to open or close the opening; One end of the bracket is rotatably connected to one side of the inner wall of the shell, and the bracket can rotate relative to the shell between a maintenance position and a working position. The LED print head is arranged on the bracket. During the process of the bracket rotating from the maintenance position to the working position, the bracket drives the LED print head close to the photosensitive drum in the processing box; during the process of the bracket rotating from the working position to the maintenance position, the bracket drives the LED print head away from the photosensitive drum in the processing box.

2. The image forming apparatus according to claim 1, wherein: 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 shell. When the bracket is in the working position, the bracket and the LED print head are located inside the shell and do not protrude from the opening.

3. The image forming apparatus according to claim 1, wherein: A hinge seat and a limit notch are relatively arranged at the upper part of the shell, and the positions of the hinge seat and the limit notch are higher than the processing box; one end of the bracket is hinged to the hinge seat, and when the bracket is in the working position, one end of the bracket away from the hinge seat is limited in the limit notch, and the axial direction of the LED print head and the photosensitive drum in the processing box is basically parallel.

4. The image forming apparatus according to claim 3, wherein: A first clamping portion is disposed on the inner wall of the position-limiting notch, and a second clamping portion capable of correspondingly clamping with the first clamping portion is disposed on one end of the bracket away from the hinge seat.

5. The image forming apparatus according to claim 4, wherein: One of the first clamping portion and the second clamping portion is a clamping slot, and the other is a protrusion adapted to the clamping slot.

6. The image forming apparatus according to claim 3, wherein: The hinge seat includes two side plates arranged at intervals and a fixed plate connected between the two side plates, the fixed plate is fixed on the inner wall of the opening, a rotating shaft is connected between the two side plates, and hinge ears are arranged at intervals at one end of the bracket, the hinge ears are located between the two side plates and are rotatably connected to the rotating shaft.

7. The image forming apparatus according to claim 6, wherein: The fixing plate is provided with a wire hole, and cables for transmitting data and power signals pass through the wire hole.

8. The image forming apparatus according to claim 1, wherein: The processing box is provided with an opening for inserting the LED print head, and both end covers in the length direction of the processing box are provided with a support for supporting the two end parts in the length direction of the LED print head.

9. The image forming apparatus according to claim 8, wherein: The support platform is provided with a notch, and the notch is used to accommodate the protrusions at both ends of the LED print head to increase the contact area between the support platform and the end of the print head.

10. The image forming apparatus according to any one of claims 1 to 9, characterized in that: The LED print head is elastically connected to the bracket.

11. The image forming apparatus according to claim 10, wherein: The bracket includes a top plate, a turning plate and a receiving plate connected in sequence, one end of the top plate is rotatably connected to one side of the inner wall of the shell, and when the bracket is in the maintenance position, one side of the top plate is against the inner side of the shell.

12. The image forming apparatus according to claim 11, wherein: The print head is mounted on the mounting plate, and a plurality of through holes are arranged on the receiving plate of the bracket at intervals along its length direction, and a pin is movably inserted in each of the through holes, one end of the pin is connected to the mounting plate, and the other end of the pin is provided with a limit head whose size is larger than the inner diameter of the through hole, and a spring is sleeved on the pin, and the two ends of the spring elastically press against the mounting plate and the receiving plate respectively.

13. The image forming apparatus according to claim 12, wherein: The receiving plate is provided with an opening, and openings are provided at positions corresponding to the cable sockets on the mounting plate and the print head. Cables for transmitting data and power signals pass through the space between the top plate and the receiving plate, and sequentially pass through the openings on the receiving plate and the mounting plate to be connected to the cable socket on the print head.

Images