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 connected with the inner side of a machine cover through a connecting rod mechanism, and in the process that the machine cover is switched from an opening position to a closing position, the connecting rod mechanism drives the LED printing head to be placed into a shell through an opening in the top of the shell and be close to a photosensitive drum in a processing box; and in the process that the machine cover is switched to the opening position from the closing position, the connecting rod mechanism drives the LED printing head to be away from the processing box. By means of the arrangement, after the machine cover is opened, the LED printing head is folded, the LED printing head cannot be collided and damaged in the process that a user replaces the processing box, after the processing box is replaced, in the process that the machine cover is put down, the LED printing head falls into the shell under the action of the connecting rod mechanism along with closing of the machine cover and is aligned with the photosensitive drum, and therefore the LED printing head is not damaged. The exposure device is used for exposing a photosensitive drum in an image forming process.

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 resolution 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 generate a single-point beam through multiple optical components such as deflection mirrors and lenses, 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. LED printers generate single-point beams through a single LED light-emitting diode with low power, which requires the LED print head to be arranged closer to the surface of the photosensitive drum. This design is prone to 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 connecting rod mechanism and an LED print head; the body includes a shell with a top opening, a space for accommodating a processing box is provided in the shell, and the processing box can be detachably installed in the space, the cover is hinged to the top of the shell, and the cover can be switched between an open position and a closed position to open or close the opening; the LED print head is connected to the inner side of the cover through the connecting rod mechanism, and when the cover is switched from the open position to the closed position, the connecting rod mechanism drives the LED print head to approach the photosensitive drum in the processing box; when the cover is switched from the closed position to the open position, the connecting rod mechanism drives the LED print head away from the processing box.

[0006] Optionally, 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 processing box and finally adheres to the inner side of the machine cover.

[0007] Optionally, during the process of switching the cover between the open position and the closed position, the length direction of the LED print head is always parallel to the axial direction of the photosensitive drum in the process box.

[0008] Optionally, 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.

[0009] Optionally, a rib is provided on the inner side of the shell, and one end of the connecting rod away from the swing arm is hinged to the rib.

[0010] Optionally, the swing arm includes a mounting bar and a connecting rod connected to the mounting bar, one end of the connecting rod away from the mounting bar is hinged to the inner side of the machine cover, the LED print head is installed on the mounting bar along the length direction of the mounting bar, the LED print head remains parallel to the photosensitive drum in the processing box, and one end of the connecting rod away from the shell is hinged to one end of the connecting rod close to the mounting bar.

[0011] Optionally, the swing arm includes at least two connecting rods, and the at least two connecting rods are spaced apart in the length direction of the mounting bar, and one end of the connecting rod away from the shell is hinged to one end of one of the connecting rods close to the mounting bar.

[0012] Optionally, the mounting bar and the connecting rod are an integrated structure.

[0013] Optionally, a wiring hole is provided on the mounting bar, and a cable for transmitting data and power signals is connected to the LED print head through the wiring hole.

[0014] Optionally, a position switch is provided on the shell near the opening, and the position switch is electrically connected to a controller of the image forming device. A pressure block corresponding to the position switch is provided on the inner side of the machine cover, and when the machine cover is in the closed position, the pressure block squeezes and triggers the position switch to put the image forming device into a working state.

[0015] 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 connects the LED print head to the inner side of the machine cover through a connecting rod mechanism, and in the process of switching the machine cover from the open position to the closed position, the connecting rod mechanism drives the LED print head to be placed into the housing through the opening at the top of the housing and finally approaches the photosensitive drum in the processing box; in the process of switching the machine cover from the closed position to the open position, the LED print head is driven away from the processing box by the connecting rod mechanism. With this arrangement, after opening the machine cover, the LED print head is retracted, and the user will not cause bumps and damage to the LED print head during the process of replacing the processing box. After the processing box is replaced, in the process of lowering the machine cover, the LED print head falls into the housing under the action of the connecting rod mechanism as the machine cover is closed, approaches and finally aligns with the photosensitive drum, and is used to expose the photosensitive drum during the image forming process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] in:

[0018] Figure 1 is a schematic structural diagram of an image forming device in an embodiment of the present application when a cover is in a closed position;

[0019] Figure 2 yes Figure 1 A schematic cross-sectional view of the structure of an image forming device shown;

[0020] Figure 3 yes Figure 1 A schematic diagram of the position states of the connecting rod mechanism, the LED print head and the photosensitive drum in the image forming device shown;

[0021] Figure 4is a schematic structural diagram of an image forming device in an embodiment of the present application when a cover is in an open position;

[0022] Figure 5 yes Figure 4 A schematic diagram of the position status of a connecting rod mechanism and an LED print head in an image forming device shown;

[0023] Figure 6 yes Figure 4 A side view of the image forming apparatus shown;

[0024] Figure 7 yes Figure 4 The schematic cross-sectional structure diagram of the image forming device shown.

[0025] Description of main component symbols:

[0026] 10. Machine body; 11. Shell; 111. Opening; 12. Processing box; 121. Photosensitive drum; 13. Position switch;

[0027] 20. Machine cover; 21. Press block;

[0028] 30. connecting rod mechanism; 31. swing arm; 311. mounting bar; 312. connecting rod; 32. connecting rod;

[0029] 40.LED print head. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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, 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 cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0033] 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.

[0034] 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.

[0035] As described in the background technology, LED printers use a single LED light emitting diode to generate a single-point light beam with low power, which requires the LED print head to be arranged closer to the surface of the photosensitive drum. This design can easily 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.

[0036] In order to solve the above problems, an embodiment of the present application provides an image forming device, such as Figure 1-Figure 2 , Figure 4 and Figure 6-Figure 7 As shown, the image forming device includes a body 10, a cover 20, a connecting rod mechanism 30 and an LED print head 40; the body 10 includes a shell 11 with a top opening 111, and a space for accommodating a processing box 12 is provided in the shell 11. The processing box 12 can be detachably installed in the above space. The processing box 12 includes a developing box and a drum box. The developing box and the drum box are separate or integrated structures. The developing box includes a developing roller and a powder 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 hinged to the top of the shell 11, and the cover 20 can be in the open position ( Figure 4 and Figure 6-Figure 7 The position of the cover 20) and the closed position ( Figure 1-Figure 2The LED print head 40 is connected to the inner side of the cover 20 through the connecting rod mechanism 30. When the cover 20 is switched from the open position to the closed position, the connecting rod mechanism 30 drives the LED print head 40 to be placed into the housing 11 through the opening 111 and close to the photosensitive drum 121 in the processing box 12. When the cover 20 is switched from the closed position to the open position, the connecting rod mechanism 30 drives the LED print head 40 away from the processing box 12.

[0037] In the embodiment of the present application, the image forming device connects the LED print head 40 to the inner side of the cover 20 through the connecting rod mechanism 30. When the cover 20 is switched from the open position to the closed position, the connecting rod mechanism 30 drives the LED print head 40 to be placed into the housing 11 through the opening 111 at the top of the housing 11 and close to the photosensitive drum 121 in the processing box 12; when the cover 20 is switched from the closed position to the open position, the connecting rod mechanism 30 drives the LED print head 40 away from the processing box 12. According to this arrangement, after the cover 20 is opened, the LED print head 40 is retracted, and the user will not cause bumps and damage to the LED print head 40 during the process of replacing the processing box 12 through the opening 111 at the top of the housing 11. After the processing box 12 is replaced, in the process of lowering the cover 20, the LED print head 40 falls into the housing 11 under the action of the connecting rod mechanism 30 as the cover 20 is closed, and finally aligns with the photosensitive drum 121, which is used to expose the photosensitive drum 121 during the image forming process.

[0038] Furthermore, if Figure 4 , Figure 6-Figure 7 As shown, in the process of switching the machine cover 20 from the closed position to the open position, the connecting rod mechanism 30 drives the LED print head 40 away from the processing box 12 and finally adheres to the inner side of the machine cover 20. According to this design, a larger space can be reserved above the opening 111, so that it is not easy to collide with the LED print head 40 during the replacement of the processing box 12.

[0039] In one embodiment, if Figure 2 , Figure 4 and Figure 7 As shown, when the cover 20 switches between the open position and the closed position, the length direction of the LED print head 40 is always parallel to the axial direction of the photosensitive drum 121 in the processing box 12.

[0040] Specifically, the cover 20 is hinged to one side of the top opening 111 of the housing 11 through a hinge, and the rotation axis of the cover 20 relative to the housing 11, the length direction of the LED print head 40 and the axis of the photosensitive drum 121 are parallel to each other.

[0041] It should be noted 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, and the rod lens array being configured to map the light emitted by the LED array onto the photosensitive drum 121.

[0042] In a specific embodiment, Figure 3-Figure 7 As shown, the connecting rod mechanism 30 includes a swing arm 31 and a connecting rod 32. One end of the swing arm 31 is hinged to the inner side of the machine cover 20, and the other end of the swing arm 31 is connected to the LED print head 40. The LED print head 40 can swing relative to the machine cover 20. One end of the connecting rod 32 is hinged to the shell 11, and the hinge is close to the hinge between the machine cover 20 and the shell 11. The other end of the connecting rod 32 is hinged to the swing arm 31.

[0043] According to the above arrangement, during the opening process of the machine cover 20, the LED print head 40 is lifted upwards driven by the swing arm 31, and gradually approaches the inner wall of the machine cover 20 under the action of the connecting rod 32; during the lowering process of the machine cover 20, the LED print head 40 falls and falls into the housing 11 under the joint action of the connecting rod 32 and the swing arm 31, and is finally positioned to align with the photosensitive drum 121.

[0044] In a specific embodiment, Figure 4 As shown, the inner side of the housing 11 is provided with ribs, and one end of the connecting rod 32 away from the swing arm 31 is hinged to the ribs. According to this design, the ribs can not only enhance the strength of the housing 11, but also serve as a mounting carrier for the connecting rod 32.

[0045] In a more specific embodiment, Figure 3-Figure 7 As shown, the swing arm 31 includes a mounting bar 311 and a connecting rod 312 connected to the mounting bar 311, one end of the connecting rod 312 away from the mounting bar 311 is hinged to the inner side of the machine cover 20, the LED print head 40 is installed on the mounting bar 311 along the length direction of the mounting bar 311, the LED print head 40 remains parallel to the photosensitive drum 121 in the processing box 12, and one end of the connecting rod 32 away from the shell 11 is hinged to the end of the connecting rod 312 close to the mounting bar 311. Specifically, the connecting rod 312, the connecting rod 32 cooperate with the machine cover 20 and the shell 11 to form a four-bar linkage.

[0046] The mounting bar 311 is provided with wiring holes, and cables for transmitting data and power signals are connected to the LED print head 40 through the wiring holes.

[0047] Furthermore, in order to improve the reliability and stability of the connection between the swing arm 31 and the inner side of the hood 20, the swing arm 31 includes at least two connecting rods 312, and the at least two connecting rods 312 are spaced apart in the length direction of the mounting bar 311, and one end of the connecting rod 32 away from the shell 11 is hinged to one end of one of the connecting rods 312 close to the mounting bar 311.

[0048] To facilitate manufacturing, the mounting bar 311 and the connecting rod 312 may be an integrated structure, which may be integrally formed by plastic injection molding.

[0049] In a specific embodiment, the LED print head 40 is detachably mounted on the mounting bar 311 , and this design facilitates the later replacement and maintenance of the LED print head 40 .

[0050] Specifically, the LED print head 40 can be mounted on the mounting bar 311 by means of a snap-fit ​​structure or screws.

[0051] In one embodiment, if Figure 4 and Figure 7 As shown, a position switch 13 (such as a micro switch) is provided near the opening 111 of the shell 11. The position switch 13 is electrically connected to the controller of the image forming device. A pressure block 21 corresponding to the position switch 13 is provided on the inner side of the cover 20. When the cover 20 is in the closed position, the pressure block 21 squeezes and triggers the position switch 13 to put the image forming device into a working state.

[0052] The position switch 13 on the housing 11 cooperates with the pressure block 21 on the cover 20 to provide protection. When the cover 20 is opened, the image forming device stops working, preventing the transmission mechanism in the body 10 from causing harm to the user during the replacement of the processing box 12.

[0053] 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.

[0054] 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 machine body, a machine cover, a connecting rod mechanism and an LED print head; the machine body comprises a shell with a top opening, a space for accommodating a processing cartridge is provided in the shell, and the processing cartridge can be detachably installed in the space, the machine cover is hinged to the top of the shell, and the machine cover can be switched between an open position and a closed position to open or close the opening; The LED print head is connected to the inner side of the machine cover through the connecting rod mechanism. During the process of switching the machine cover from the open position to the closed position, the connecting rod mechanism drives the LED print head close to the photosensitive drum in the processing box; during 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 processing box.

2. The image forming apparatus according to claim 1, wherein: 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 processing box and finally adheres to the inner side of the machine cover.

3. The image forming apparatus according to claim 1, wherein: During the process of switching the cover between the open position and the closed position, the length direction of the LED print head is always parallel to the axis direction of the photosensitive drum in the process box.

4. The image forming apparatus according to any one of claims 1 to 3, characterized in that: 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.

5. The image forming apparatus according to claim 4, wherein: A rib is arranged on the inner side of the shell, and one end of the connecting rod away from the swing arm is hinged to the rib.

6. The image forming apparatus according to claim 4, wherein: The swing arm includes a mounting bar and a connecting rod connected to the mounting bar, one end of the connecting rod away from the mounting bar is hinged to the inner side of the machine cover, the LED print head is installed on the mounting bar along the length direction of the mounting bar, the LED print head remains parallel to the photosensitive drum in the processing box, and one end of the connecting rod away from the shell is hinged to one end of the connecting rod close to the mounting bar.

7. The image forming apparatus according to claim 6, wherein: The swing arm includes at least two connecting rods, which are arranged at intervals in the length direction of the mounting bar, and one end of the connecting rod away from the shell is hinged to one end of one of the connecting rods close to the mounting bar.

8. The image forming apparatus according to claim 6, wherein: The mounting bar and the connecting rod are an integrated structure.

9. The image forming apparatus according to claim 6, wherein: The mounting bar is provided with wiring holes, and cables for transmitting data and power signals are connected to the LED print head through the wiring holes.

10. The image forming apparatus according to claim 1, wherein A position switch is arranged on the shell near the opening, and the position switch is electrically connected to the controller of the image forming device. A pressure block corresponding to the position switch is arranged on the inner side of the cover. When the cover is in the closed position, the pressure block squeezes and triggers the position switch to put the image forming device into a working state.

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