Photosensitive shell and processing box

Abstract

The photosensitive shell comprises a main body part, a protective cover and an elastic piece which are combined with one another, the main body part is used for bearing the photosensitive drum, the protective cover has a first position and a second position, and the protective cover is opened at the first position; at the second position, the protective cover is closed; the elastic piece is used for resetting the protective cover and comprises a first extension arm, a second extension arm and an elastic piece main body for supporting the first extension arm and the second extension arm; the first extension arm is used for abutting against the main body part, and the second extension arm is used for abutting against the protective cover; the main body part comprises a combining part, the protective cover comprises a combined part, and the protective cover is combined and mounted on the main body part through the combining part and the combined part; the photosensitive shell is further provided with a third mounting part used for mounting the elastic piece main body, and the third mounting part is arranged on the outer side of the combination part and the combined part in the longitudinal direction; according to the design, the elastic piece can be directly installed through automatic equipment, the labor cost is saved, and meanwhile the production efficiency can be improved.

Description

[0001] The patent application of this invention claims the priority of the prior application entitled “Photosensitive housing and processing box” and application number 202420022065.5 filed on January 3, 2024, and the entire contents of the prior application are cross-referenced in this application. Technical Field

[0002] The invention relates to the field of electronic photographic imaging, and in particular to a processing box detachably installed in an electronic photographic imaging device and a photosensitive shell installed in the processing box. Background Art

[0003] There is a processing box that can be detachably installed to an electronic photographic imaging device (hereinafter referred to as the "device"), and the processing box includes a rotatable photosensitive drum, a charging roller and a developing roller; after the charging roller charges the photosensitive drum, the surface of the photosensitive drum is irradiated with a laser to form an electrostatic latent image; the developing roller provides a developer to the photosensitive drum to develop the electrostatic latent image; during the transportation of the processing box, the photosensitive drum needs to be protected.

[0004] A protective cover is usually arranged on the outside of the photosensitive drum to protect the photosensitive drum; an elastic member is usually installed on the processing box, and the elastic member is usually a torsion spring; the protective cover can rotate around the rotating shaft of the protective cover, and the torsion spring is used to reset the protective cover after opening; since the torsion spring is installed on the inner side of the rotating shaft of the protective cover, when the processing box is automatically assembled, the torsion spring and the rotating shaft of the protective cover will interfere with each other, resulting in the inability to install the torsion spring. Therefore, in the prior art, manual assembly of the processing box is usually required. However, this assembly method makes the labor cost relatively high and the production efficiency low. Summary of the invention

[0005] The present invention provides a protective cover to solve the above problems. The specific solution is as follows:

[0006] A photosensitive shell comprises a main body, a protective cover and an elastic member which are combined with each other; the main body is used to carry a photosensitive drum which can form an electrostatic latent image, and the protective cover can move between a first position and a second position; when the protective cover is in the first position, the protective cover is opened and the photosensitive drum is exposed; when the protective cover is in the second position, the protective cover is closed and the photosensitive drum is shielded by the protective cover; the elastic member is used to reset the protective cover from the first position to the second position; the elastic member comprises an elastic member main body, a first extension arm and a second extension arm; the elastic member main body is used to support the first extension arm and the second extension arm; the first extension arm is used to abut against the main body, and the second extension arm is used to abut against the protective cover; along the longitudinal direction of the photosensitive shell, the direction from the center of the photosensitive shell to the longitudinal end of the photosensitive shell is the outer direction; the main body also comprises a combining part, and the protective cover comprises a combined part, and the protective cover is mounted on the main body by combining with the combined part through the combining part; the photosensitive shell is also provided with a third mounting part for mounting the elastic member main body, and along the longitudinal direction, the third mounting part is arranged on the outer side of the combining part and the combined part.

[0007] Further, along the longitudinal direction, the elastic member body is located outside the combining portion and the combined portion.

[0008] Furthermore, the main body also includes a first mounting portion for mounting the first extension arm, and the first mounting portion is at least one of a groove and a protrusion formed on the main body, or a combination of a groove and a protrusion arranged adjacent to each other.

[0009] Furthermore, the protective cover comprises a second mounting portion for mounting the second extension arm, and the second mounting portion is at least one of a groove and a protrusion formed on the protective cover, or a combination of a groove and a protrusion arranged adjacent to each other.

[0010] Furthermore, the third mounting portion is provided with a blocking portion and a supporting portion, the blocking portion is used to block the elastic member body from falling out, and the supporting portion is used to support the elastic member body, and along the longitudinal direction, the blocking portion is located outside the supporting portion.

[0011] Furthermore, in a direction perpendicular to the rotation axis of the protective cover, the maximum dimension of the blocking portion is not less than the inner diameter of the elastic member body before the elastic member is installed.

[0012] Furthermore, the blocking portion is provided with at least one cutout.

[0013] Furthermore, the blocking portion is provided with a guiding inclined surface for guiding the installation of the elastic member.

[0014] The present invention also relates to a processing box, comprising a developing unit and a photosensitive unit combined with each other, the developing unit comprising a developing shell for accommodating a developer and a developing roller rotatably arranged in the developing shell, the developing roller being used to carry the developer; the photosensitive unit comprises the photosensitive shell as described above, a photosensitive drum is rotatably arranged in the photosensitive shell, and the developing roller supplies the developer to the photosensitive drum.

[0015] By adopting the above technical solution, the beneficial effect that can be obtained by the present invention is: the third installation part for installing the elastic part body is arranged on the outside of the combining part and the combined part, so that the elastic part can be directly installed by automated installation equipment, thereby realizing automated assembly of the processing box, which not only improves production efficiency but also saves labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a perspective view of a process cartridge according to the present invention.

[0017] Figure 2 It is a three-dimensional view of the processing box involved in the present invention with the protective cover hidden.

[0018] Figure 3 It is a three-dimensional diagram of a photosensitive housing involved in the present invention.

[0019] Figure 4 It is a partial schematic diagram of the photosensitive housing involved in the present invention. DETAILED DESCRIPTION

[0020] like Figure 1 , Figure 2 and Figure 4 As shown, the processing box A can be detachably installed to the electronic photographic imaging device; the processing box A includes a developing unit 1 and a photosensitive unit 2 which are combined with each other; the developing unit 1 includes a developing shell that can accommodate a developer and a developing roller rotatably mounted on the developing shell; the photosensitive unit 2 includes a photosensitive shell 21, a photosensitive drum 22 rotatably mounted on the photosensitive shell 21, and a charging roller; when the processing box A is working, the charging roller contacts the photosensitive drum 22 and charges the surface of the photosensitive drum 22. After the charging roller charges the photosensitive drum 22, the surface of the photosensitive drum 22 is irradiated by the laser of the device to form an electrostatic latent image, and the developing roller provides the photosensitive drum 22 with a developer to develop the electrostatic latent image.

[0021] The photosensitive housing 21 includes a main body 23, a protective cover 3 and an elastic member 4; the protective cover 3 is rotatably arranged on the main body 23 and is used to cover the outside of the photosensitive drum 22; the protective cover 3 includes a supporting member 31 and a protective member 32; wherein the protective member 32 covers the outside of the photosensitive drum 22 to protect the photosensitive drum 22 from being contaminated; the supporting member 31 is used to be combined with the photosensitive housing 21 to support the protective member 32; the elastic member 4 is installed between the main body 23 and the protective cover 3, and is used to reset the protective cover 3 after it is opened; specifically, the protective cover 3 can move between a first position and a second position; when the protective cover 3 is in the first position, the protective cover 3 is opened. When the protective cover 3 is in the second position, the protective cover 3 is closed and the photosensitive drum 22 is blocked by the protective cover 3. The elastic member 4 is used to reset the protective cover 3 from the first position to the second position. The elastic member 4 includes an elastic member body 4c, a first extension arm 4a and a second extension arm 4b. The first extension arm 4a is used to abut against the main body 23, and the second extension arm 4b is used to abut against the protective cover 3. The elastic member body 4c is used to support the first extension arm 4a and the second extension arm 4b. The first extension arm 4a and the second extension arm 4b are used to guide the deformation of the elastic member 4. Preferably, the protective member 32 and the support member 31 are separately arranged.

[0022] In some embodiments, the protection member 32 and the support member 31 are formed integrally.

[0023] like Figure 3 and Figure 4 As shown, along the longitudinal direction of the photosensitive shell 21, the direction from the center of the photosensitive shell 21 to the longitudinal end of the photosensitive shell 21 is defined as the outer direction; the main body 23 is provided with a coupling portion 5 for cooperating with the protective cover 3; in the longitudinal direction, the coupling portion 5 is arranged at the end of the main body 23; the protective cover 3 can rotate around the coupling portion 5; the main body 23 is provided with a first mounting portion 41 for mounting / accommodating the first extension arm 4a; preferably, along the longitudinal direction, the first mounting portion 41 is arranged on the outer side of the coupling portion 5; the first mounting portion 41 can be set as a groove depressed downward from the surface of the main body 23, or can be set as a protrusion raised from the surface of the main body 23, or can be a combination formed by the adjacent arrangements of the groove and the protrusion.

[0024] The protective cover 3 is provided with a coupled portion 6, and in the longitudinal direction, the coupled portion 6 is arranged at the end of the protective cover 3 for cooperating with the coupling portion 5; the protective cover 3 is rotatably mounted on the photosensitive housing 21 through the cooperation of the coupling portion 5 and the coupled portion 6; along the longitudinal direction, the elastic member main body 4c is located on the outside of the coupling portion 5 and the coupled portion 6.

[0025] The protective cover 3 is provided with a second mounting portion 42 for mounting / accommodating the second extension arm 4b; preferably, the second mounting portion 42 is arranged on the outside of the coupled portion 6; the second mounting portion 42 can be arranged as a groove sunken downward from the surface of the protective cover 3, or as a protrusion raised from the surface of the protective cover 3, or as a combination of the groove and the protrusion arranged adjacent to each other.

[0026] In some embodiments, along the longitudinal direction, the first mounting portion 41 may also be disposed on the inner side of the coupling portion 5 , and the second mounting portion 42 may also be disposed on the inner side of the coupled portion 6 , as long as the elastic member body 4c is ensured to be located on the outer sides of the coupling portion 5 and the coupled portion 6 .

[0027] The photosensitive housing 21 is provided with a third mounting portion 43 for mounting an elastic member main body 4c. The third mounting portion 43 extends from at least one of the coupled portion 6 or the coupled portion 5 toward the outside of the photosensitive housing 21. The outside of the third mounting portion 43 is not blocked, so as to allow the elastic member 4 to enter the third mounting portion 43. Specifically, it is at least used to allow the elastic member main body 4c to enter the third mounting portion 43. Even if the outside of the first mounting portion 41 and the outside of the second mounting portion 42 are blocked, the first extension arm 4a and the second extension arm 4b can be forced to undergo elastic deformation so that the first extension arm 4a and the second extension arm 4b can enter the first mounting portion 41 and the second mounting portion 42 smoothly respectively. The third mounting portion 43 cooperates with the first mounting portion 41 and the second mounting portion 42 to jointly position the elastic member 4.

[0028] The third mounting portion 43 is provided with a blocking portion 43a for blocking the elastic member body 4c from falling out, and a supporting portion 43d for supporting the elastic member body 4c; the blocking portion 43a is provided on the supporting portion 43d, and along the longitudinal direction, the blocking portion 43a is located outside the supporting portion 43d; generally, the elastic member 4 is provided as a torsion spring, and the elastic member body 4c is the torsion spring body; before the torsion spring 4 is installed, in the radial direction perpendicular to the rotation axis of the protective cover 3, the maximum size of the blocking portion 43a is not less than the inner diameter of the torsion spring 4 / torsion spring body 4c, so that when the torsion spring 4 is in the installed state, even if no external force is applied to the torsion spring 4, the torsion spring 4 is not easy to fall off from the third mounting portion 43; During the installation process of the torsion spring 4, the torsion spring 4 undergoes elastic deformation. After the installation of the torsion spring 4 is completed, the torsion spring 4 is in a state of slight elastic deformation, the inner diameter of the torsion spring body 4c is reduced, and the torsion spring 4 is not easy to fall out; when the protective cover 3 is opened, the torsion spring 4 continues to undergo elastic deformation, the inner diameter of the torsion spring body 4c is further reduced, and the torsion spring 4 is even less likely to fall out; preferably, at least one notch 43b is provided on the blocking portion 43a, and the notch 43b is formed by the radial end of the blocking portion 43a extending inwardly; the notch 43b is used to prevent the torsion spring 4 from being stuck by the blocking portion 43a during installation; at the same time, the blocking portion 43a is provided with a guide slope 43c, and the guide slope 43c is used to guide the torsion spring 4 to pass through the blocking portion 43a.

[0029] In some embodiments, the blocking portion 43a may not be connected to the supporting portion 43d, as long as the blocking portion 43a can prevent the elastic member body 4c from falling out.

[0030] The process of installing the protective cover 3 and the torsion spring 4 using automated equipment is as follows:

[0031] Step 1: Install the protective cover 3 onto the main body 23 by using a protective cover installation device, so that the combining portion 5 and the combined portion 6 are combined with each other;

[0032] Step 2: Clamp the torsion spring 4 by a torsion spring installation device, specifically, clamp at least the first extension arm 4a and the second extension arm 4b, and position the torsion spring 4 to the outer side of the blocking portion 43a;

[0033] Step 3: Use the pushing component in the automation equipment to push the torsion spring 4 / torsion spring body 4c for installation. During the pushing process, the torsion spring 4 moves along the guiding slope 43c and is elastically deformed under the action of the guiding slope 43c until the torsion spring 4 / torsion spring body 4c passes over the blocking portion 43a. At the same time, the first extension arm 4a enters the first mounting portion 41, and the second extension arm 4b enters the second mounting portion 42. The torsion spring 4 / torsion spring body 4c is restricted by the blocking portion 4a, and the installation of the protective cover 3 and the torsion spring 4 is completed.

[0034] As described above, by providing the third mounting portion 43 for mounting the elastic member 4 outside the coupling portion 5 and the coupled portion 6, the elastic member 4 can be directly mounted by automated equipment, thus saving labor costs and improving production efficiency.

Claims

1. A photosensitive housing, comprising a main body, a protective cover and an elastic member which are combined with each other; the main body is used to carry a photosensitive drum which can form an electrostatic latent image, and the protective cover can move between a first position and a second position; When the protective cover is in the first position, the protective cover is opened and the photosensitive drum is exposed; When the protective cover is in the second position, the protective cover is closed and the photosensitive drum is shielded by the protective cover; The elastic member is used to reset the protective cover from the first position to the second position; the elastic member includes an elastic member body, a first extension arm and a second extension arm; the elastic member body is used to support the first extension arm and the second extension arm; the first extension arm is used to abut against the main body, and the second extension arm is used to abut against the protective cover; along the longitudinal direction of the photosensitive housing, the direction from the center of the photosensitive housing to the longitudinal end of the photosensitive housing is the outer direction; it is characterized in that: The main body also includes a combining portion, the protective cover includes a combined portion, and the protective cover is mounted on the main body by combining the combining portion with the combined portion; The photosensitive housing is further provided with a third mounting portion for mounting the elastic member body, and along the longitudinal direction, the third mounting portion is arranged outside the combining portion and the combined portion.

2. The photosensitive housing according to claim 1, characterized in that: In the longitudinal direction, the elastic member body is located outside the combining portion and the combined portion.

3. The photosensitive housing according to claim 1, characterized in that: The main body also includes a first mounting portion for mounting the first extension arm. The first mounting portion is at least one of a groove and a protrusion formed on the main body, or a combination of a groove and a protrusion arranged adjacent to each other.

4. The photosensitive housing according to claim 1, characterized in that: The protective cover comprises a second mounting portion for mounting the second extension arm, and the second mounting portion is at least one of a groove and a protrusion formed on the protective cover, or a combination of a groove and a protrusion arranged adjacent to each other.

5. The photosensitive housing according to claim 1, characterized in that: The third mounting portion is provided with a blocking portion and a supporting portion, wherein the blocking portion is used to block the elastic member body from falling out, and the supporting portion is used to support the elastic member body, and along the longitudinal direction, the blocking portion is located outside the supporting portion.

6. The photosensitive housing according to claim 5, characterized in that: In a direction perpendicular to the rotation axis of the protective cover, the maximum dimension of the blocking portion is not less than the inner diameter of the elastic member body before the elastic member is installed.

7. The photosensitive housing according to claim 5, characterized in that: The blocking portion is provided with at least one cutout.

8. The photosensitive housing according to claim 5, characterized in that: The blocking portion is provided with a guiding inclined surface for guiding the installation of the elastic member.

9. A process cartridge, characterized in that: The processing box includes a developing unit and a photosensitive unit combined with each other, the developing unit includes a developing shell for accommodating the developer and a developing roller rotatably arranged in the developing shell, the developing roller is used to carry the developer; the photosensitive unit includes a photosensitive shell as described in any one of claims 1 to 8, a photosensitive drum is rotatably arranged in the photosensitive shell, and the developing roller supplies the developer to the photosensitive drum.

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