Patent Publication Number: US-2022221810-A1

Title: Developing cartridge

Description:
TECHNICAL FIELD 
     The present disclosure relates to a developing cartridge, which can be detachably installed in an electronic imaging device. 
     BACKGROUND 
     An electronic imaging device is a device that forms an image on a recording material through the principle of electrophotographic imaging, for example, an electrophotographic copier, a laser printer, an electrophotographic printer (such as a laser printer and an LED printer, etc.), a fax machine, and a word processor. The imaging device usually includes a developing cartridge and a drum cartridge. The developing cartridge supplies a developer to the drum cartridge that has been formed with an electrostatic latent image. A visible developer image corresponding to the electrostatic latent image is formed on a photosensitive drum of the drum cartridge. Then, the developer image is transferred onto a recording medium through transferring, and finally the developer image is fixed onto the recording medium through fixing. Finally, the recording medium is discharged from an image forming apparatus to complete the printing operation. 
     Generally, the developing cartridge includes: a housing, which can store developer; a developing roller, which is supported at both ends of the housing; and a layer thickness regulating member, which controls the thickness of the developer on the developing roller. The layer thickness regulating member includes a blade, and the blade is in contact with the developing roller and controls the thickness of the developer on the developing roller. During the working process of the developing cartridge, the layer thickness regulating member needs to be stably installed on the housing, so that the thickness of the developer on the developing roller can always be maintained at a uniform thickness, thereby ensuring the printing quality of the imaging apparatus. 
     As shown in  FIG. 1 , a developing cartridge is disclosed in the prior art. It includes a housing  61  for storing a developer, and a handle at an upper end of the housing. The handle includes an elastic plate  70 , a bottom plate  67 , and a connecting wall  68  for connecting the elastic plate  70  and the housing  61 . However, in actual use, if a user exerts too much force, it is easy to squeeze the elastic plate  70  excessively, resulting in the elastic plate not recovering from deformation or directly fracturing the elastic plate  70 . 
     SUMMARY 
     In order to solve the above problem in the prior art that the elastic plate in the handle is easily damaged, the developing cartridge of the present disclosure adopts the following technical solution: 
     A developing cartridge, which can be detachably installed in an electronic imaging device, comprising: 
     a housing having a developer accommodating portion capable of accommodating developer; 
     a developing roller, which is provided on a lower end side of the housing, is rotatably supported by the housing, and can carry the developer on its outer surface; and 
     a handle provided on an upper end side of the housing opposite to the lower end side; 
     wherein the handle comprises a grasping portion, the grasping portion has an upper plate and a lower plate, an accommodating portion is provided between the lower plate and the housing, and a rib connecting the upper plate and the lower plate is provided between the upper plate and the lower plate. 
     Preferably, the upper plate, the lower plate, and the accommodating portion are sequentially arranged in an up and down direction. 
     Preferably, a plurality of ribs are provided between the upper plate and the lower plate, and a gap portion is provided between the plurality of ribs. 
     Preferably, the rib is provided at an approximately central position of the upper plate and the lower plate in a length direction. 
     Preferably, a pair of connecting walls is provided between the upper plate and the housing, and the rib is provided between the pair of connecting walls. 
     Preferably, the upper plate and the lower plate are arranged in parallel, and the rib is arranged perpendicular to the upper plate and the lower plate. 
     Preferably, an upper end surface of the housing is flush with an upper end surface of the lower plate. 
     Preferably, a pair of connecting walls is provided between the upper plate and the housing, the connecting walls protrude outside the housing, and the rib is provided between the pair of connecting walls. 
     After the above technical solution is adopted, the deformation of the upper plate can be effectively prevented by adding the rib between the upper plate and the lower plate. The technical problem of fracturing the upper plate caused during the process of grasping the developing cartridge is avoided. The structure is simple and stable, and it is easy for users to operate. 
    
    
     
       BRIEF DESCRIPTION OF FIGURES 
         FIG. 1  is a schematic diagram of a three-dimensional structure of an existing developing cartridge; 
         FIG. 2  is a schematic diagram of a three-dimensional structure of a developing cartridge according to an embodiment of the present disclosure viewed from a first view angle; 
         FIG. 3  is a schematic diagram of the three-dimensional structure of the developing cartridge according to an embodiment of the present disclosure viewed from a second view angle; and 
         FIG. 4  is a schematic diagram of the three-dimensional structure of the developing cartridge according to an embodiment of the present disclosure viewed from a third view angle. 
     
    
    
     DETAILED DESCRIPTION 
     In order to make the objectives, technical solutions and technical effects of the embodiments of the present disclosure clearer, the technical solution of the developing cartridge of the present disclosure will be described clearly and completely in conjunction with the accompanying drawings. 
     In the following description, an extending direction of a rotation axis of a developing roller is a length direction of a developing cartridge. 
     As shown in  FIGS. 2 to 4 , which are schematic diagrams of a three-dimensional structure of a developing cartridge according to an embodiment of the present disclosure, the developing cartridge includes: a housing  1  having a developer accommodating portion capable of accommodating a developer; and a developing roller  2 , which can carry the developer on its outer surface, and is rotatably supported by the housing  1 ; a doctor blade  3 , which regulates the thickness of the developer on the outer surface of the developing roller  2 , and at the same time causes the developer to be frictionally charged with the toner discharging blade and the developing roller; and a handle  4  provided at an upper end of the housing  1 , wherein the developing roller  2  is provided at a lower end of the housing  1 , and the upper end and the lower end of the housing  1  are arranged opposite to each other. The handle  4  has a grasping portion  401 , and the grasping portion  401  has an upper and lower layer structure. Specifically, it includes an upper plate  401   a  and a lower plate  401   b . A rib  401   c  is connected between the upper plate  401   a  and the lower plate  401   b , and used to support the upper plate  401   a  and the lower plate  401   b . An accommodating portion  401   d  capable of accommodating a user&#39;s fingers is provided between the lower plate  401  and the housing  1 . Preferably, the upper plate  401   a  and the lower plate  401   b  are arranged in parallel, the rib  401   c  is arranged perpendicular to the upper plate  401   a  and the lower plate  401   b , and the lower plate  401   b  is parallel to an upper end surface  1   a  of the housing  1 . Further, the rib  401   c  is provided at an approximately central position of the upper plate  401   a  and the lower plate  401   b  in a length direction. 
     Further, the housing  1  has an upper end surface  1   a , and the upper end surface  1   a  of the housing  1  is flush with an upper end surface  401   b   1  of the lower plate  401   b . This design can simplify the structure of the injection mold, and avoid the complicated design of the mold structure caused by the step structure provided between the upper end surface  1   a  and the upper end surface  401   b   1  of the lower plate  401   b . Preferably, the upper plate  401   a , the lower plate  401   b , and the accommodating portion  401   d  are sequentially arranged in an up and down direction. An accommodating portion  401   d  is provided between the lower plate  401   b  and the housing  1 , and the accommodating portion  401   d  is convenient for the user&#39;s fingers to be accommodated. A pair of connecting walls  401   f  is provided between the upper plate  401   a  and the housing  1  and protrudes outside the housing  1 . In addition, the rib  401   c  is provided between the pair of connecting walls  401   f , which can facilitate the user&#39;s grasping. Moreover, it makes the marking of the handle obvious, which is convenient for the user to operate. Further, there are a plurality of ribs  401   c  between the upper plate  401   a  and the lower plate  401   b , preferably three, to further strengthen the connection strength between the upper plate  401   a  and the lower plate  401   b . A gap portion  401   e  is also provided between the plurality of ribs  401   c.    
     In the present disclosure, the deformation of the upper plate can be effectively prevented by adding the rib between the upper plate and the lower plate. The technical problem of fracturing the upper plate caused during the process of grasping the developing cartridge is avoided. The structure is simple and stable, and it is easy for users to operate. 
     The above embodiments are only used to illustrate the technical solutions of the present disclosure, and are not intended to limit the present disclosure. Although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that it is still possible to make modifications of the technical solutions described in the foregoing embodiments or equivalent replacements of some technical features therein. However, these modifications or replacements do not cause the essence of corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.