Photosensitive element box

Abstract

The present invention discloses a photosensitive element box, comprising: a photosensitive drum, which is configured to rotate around its own axis, and the photosensitive drum has a first end and a second end separated from the first end in the axial direction; a driving force receiving member, which is arranged at the first end of the photosensitive drum and is used to drive the photosensitive drum to rotate; a charging device, which can charge the surface of the photosensitive drum; a lower frame, which can support the photosensitive drum; an upper frame, which can support the charging device; the upper frame and the lower frame can be separated and engaged with each other in a direction perpendicular to the axial direction, and also includes a retaining member, which retains the driving force receiving member in the lower frame. The technical problem of the prior art that the driving force receiving member is unstable in positioning because it is supported by the upper and lower frames, and that the connection method of the upper and lower frames is complicated and the molding process is complicated is solved.

Description

Technical Field

[0001] The invention relates to a photosensitive element box used in an image forming device. Background Art

[0002] A processing cartridge is a device that can be detachably installed in the main body of an image forming device. Processing cartridges are generally constructed in two forms: one is an integrated type, that is, the developing cartridge and the photosensitive element cartridge form a whole, are installed in an undetachable manner, and are integrally installed in the image forming device; the other is a split type, that is, the developing cartridge and the photosensitive element cartridge are detachably connected, and the photosensitive element cartridge can be installed in the image forming device alone or removed from the image forming device alone. The photosensitive element cartridge usually includes a frame, which can support a photosensitive drum, a charging device, and has a structure such as a receiving portion for receiving the developing cartridge.

[0003] In the prior art, there is a photosensitive element box in which the upper frame and the lower frame are connected by a retaining component, a part of the photosensitive drum driving force receiving component is supported by the upper frame, and the other part is supported by the lower frame, and the retaining component connects the upper frame and the lower frame. However, in the photosensitive element box of this structure, the photosensitive drum driving force receiving component is connected by the upper frame and the lower frame, and the driving force receiving component cannot be fixed very stably, which is more likely to lead to technical problems such as complex connection methods and complex molding processes between the upper and lower frames; and the upper frame provided with a charging device is more likely to be affected by the driving force receiving component, resulting in problems such as poor imaging quality. Summary of the invention

[0004] In order to solve the above defects in the prior art, the present invention is implemented by the following technical solutions: Provide a photosensitive element cartridge, comprising: a photosensitive drum configured to rotate around its own axis, the photosensitive drum having a first end and a second end separated from the first end in the axial direction;

[0005] a driving force receiving member, disposed at the first end of the photosensitive drum, for driving the photosensitive drum to rotate;

[0006] A charging device capable of charging the surface of the photosensitive drum; a lower frame capable of supporting the photosensitive drum; an upper frame capable of supporting the charging device; a first bearing member having a first receiving portion for a photosensitive element; a second bearing member having a second receiving portion for a photosensitive element; a retaining member, wherein the retaining member retains the driving force receiving member in the lower frame; a cleaning roller for cleaning residual carbon powder on the surface of the photosensitive drum; a cleaning roller electrode connectable to the cleaning roller; the first receiving portion of the photosensitive element is configured to receive the first end, and the second receiving portion of the photosensitive element is configured to receive the second end; the upper frame and the lower frame are capable of being separated and engaged with each other in a direction perpendicular to the axial direction; and the cleaning roller electrode is supported by the second bearing member.

[0007] The lower frame is provided with a positioning column, a limiting protrusion and a positioning boss; the upper frame is provided with a positioning groove, a limiting groove and a positioning block; when the upper frame is connected to the lower frame, the positioning groove engages with the positioning column, the limiting protrusion is inserted into the limiting groove, and the positioning block engages with the positioning boss.

[0008] A left bearing and a right bearing are installed on the lower frame, and the left bearing and the right bearing support the first end and the second end.

[0009] The retaining member includes a driving force receiving member accommodating portion having a substantially cylindrical shape.

[0010] The retaining member may be mounted in the left bearing.

[0011] Compared with the prior art, the photosensitive element box provided by the present invention has a driving force receiving member supported only by the lower frame, not by the upper frame, and can be stably located in the lower frame. Moreover, the rotation of the driving force receiving member will not affect the charging device in the upper frame. This structure simplifies the connection between the upper and lower frames, and the molding process of the upper and lower frames is also simpler. This solves the technical problem that the driving force receiving member is unstable in positioning because it is supported by the upper and lower frames, and it is easy to cause the connection between the upper and lower frames to be complicated, and the molding process of the upper and lower frames to be complicated. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of a photosensitive element box of the present invention;

[0013] Figure 2 It is a left schematic diagram of the photosensitive element box of the present invention;

[0014] Figure 3 is a schematic diagram of a left retaining member in a photosensitive element cartridge of the present invention;

[0015] Figure 4 is another schematic diagram of the left retaining member in the photosensitive element cartridge of the present invention;

[0016] Figure 5 It is a right side view of the photosensitive element box of the present invention;

[0017] Figure 6 is a schematic diagram of a right retaining member in a photosensitive element cartridge of the present invention;

[0018] Figure 7 is another schematic diagram of the right retaining member in the photosensitive element cartridge of the present invention;

[0019] Figure 8 is a partially exploded schematic diagram of the photosensitive element box of the present invention;

[0020] Fig. 9 is a schematic diagram of the lower frame of the photosensitive element box of the present invention;

[0021] Fig.10 is an exploded view of the lower frame of the photosensitive element box of the present invention;

[0022] Fig.11 This is a schematic diagram of the assembly of the lower frame of the photosensitive element box and the left bearing of the utility model;

[0023] Fig.12 is a schematic diagram of a left bearing in a photosensitive element box of the present invention;

[0024] Fig.13 is a schematic diagram of the right bearing in the photosensitive element box of the present invention;

[0025] Fig.14 is another schematic diagram of the right bearing in the photosensitive element box of the present invention;

[0026] Fig.15 is a schematic diagram of a cleaning roller electrode in a photosensitive element box of the present invention;

[0027] Fig.16 is a schematic diagram of the upper frame of the photosensitive element box of the present invention;

[0028] Fig.17 It is an exploded schematic diagram of the upper frame of the photosensitive element box of the present invention;

[0029] Fig.18 Schematic diagram of a cleaning component of a photosensitive element cartridge according to the present invention;

[0030] Fig.19 It is another exploded view of the upper and lower frames in the photosensitive element box of the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and technical effect of the embodiment of the present invention clearer, the technical scheme of the developer box of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is only a preferred embodiment of the present invention, not all embodiments. Based on the embodiment of the present invention, other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present invention.

[0032] In order to more conveniently and clearly describe the positional relationship in the photosensitive element cartridge of the present invention, the extending direction of the photosensitive drum 80 is defined as the axial direction, and can also be defined as the left and right directions; the direction parallel to the installation direction of the photosensitive element cartridge is defined as the front and rear directions; the third direction perpendicular to the left and right directions and the front and rear directions is defined as the upper and lower directions. Figure 1 and Figure 2 The A direction shown is the installation direction of the photosensitive element cartridge in the image forming apparatus.

[0033] The photosensitive element cartridge 1 of the present invention can be installed into or removed from an image forming device along an installation direction A. Figure 1 and Figure 2 As shown, the photosensitive element box 1 includes a frame, and the frame includes an upper frame 20 and a lower frame 10. The upper frame 20 and the lower frame 10 can be separated or engaged with each other in the upper and lower directions. The rear end of the lower frame 10 is provided with a receiving portion 14 for receiving a developing box (not shown), and the receiving portion 14 is configured to be substantially hollow. The left side of the lower frame 10 is provided with a first side wall 11, and the right side is provided with a second side wall 12. The first side wall 11 and the second side wall 12 are separated from each other in the left and right directions and are configured to extend in the front and rear directions; the rear wall 13 connects the first side wall 11 and the second side wall 12; the rear wall 13 is provided with a pushing device 15 and a handle 13a, and the handle 13a is provided in the middle of the rear wall 13 in the left and right directions, so as to facilitate the user to grab the photosensitive element box. In this embodiment, two pushing devices 15 are preferably provided, which are respectively arranged at one end close to the first side wall 11 and one end close to the second side wall 12 in the left and right directions, and the two pushing devices 15 can be symmetrically arranged relative to the handle 13a; the locking device 16 is arranged on the second side wall 12, and is constructed to lock the developing box (not shown) installed in the photosensitive element box so that the developing box will not detach from the accommodating portion 14.

[0034] Figure 2 It is a schematic view of the left side of the photosensitive element box 1, showing the structure of the first side wall 11 of the photosensitive element box. The left side of the photosensitive element box 1 is the driving side, and is provided with a driving force receiving member 31, which is configured to engage with a driving force conveying device (not shown) in the image forming device to receive the driving force in the image forming device; a left retaining member 30 is also provided on the left side of the photosensitive element box. The left retaining member 30 includes a driving force receiving member accommodating portion 30c, which is formed in a roughly cylindrical shape and is configured to receive and support the driving force receiving member 31. The driving force receiving member 31 is located in the driving force receiving member accommodating portion 30c. Due to this structure, when the photosensitive element box is installed in the image forming device or removed from the image forming device, it is possible to prevent damage to the connecting parts due to collision with other components. Figure 3 As shown, the left side surface of the left retaining member 30 includes a downstream side end surface 30a and an upstream side end surface 30b, the downstream side end surface 30a has a first protrusion d1, and the upstream side end surface 30b has a second protrusion d2. In the present invention, the first protrusion d1 is equal to the second protrusion d2. In the axial direction, the first protrusion d1 and the second protrusion d2 are approximately equal to the height of the approximately cylindrical drive force receiving member accommodating portion 30c. When the left retaining member 30 is mounted on the first side wall 11, it is formed as shown in Figure 2In the structure shown, the left retaining member 30 installed in the lower frame 10 has a downstream side end face 30a protruding from the first side wall by a first distance in the axial direction, and an upstream side end face 30b protruding from the first side wall by a second distance, and the first distance is equal to the second distance, so the downstream side end face 30a is roughly flush with the upstream side end face 30b in the axial direction. The left side face of the left retaining component 30 is roughly formed into a flat plate shape, and the molding process is simpler than that of the prior art, and the problem that the protrusion of the downstream side end face is less than that of the upstream side end face in the prior art will not occur, so that during transportation, because the upstream side end face protrudes more to the left, it is easier to collide with external substances during transportation, and the problem of the left retaining component breaking occurs.

[0035] The left holding member 30 of the present invention further comprises a first meshing portion 30e and a second meshing portion 30d. The first meshing portion 30e and the second meshing portion 30d are configured to mesh with the lower frame 10, and the meshing mode can be set to a common snap fit or other meshing mode, as long as it can achieve the installation of the left holding member 30 to the lower frame.

[0036] Figure 5 It is a right view of the photosensitive element box, showing the structure of the right side of the photosensitive element box. The right side of the photosensitive element box is a conductive side, and a plurality of conductive components are provided. The conductive components include a photosensitive drum conductive component 40a, which is configured to contact with a photosensitive drum power supply unit (not shown) of an image forming device to transmit power to the photosensitive drum; a discharge wire electrode 60, which is configured to contact with a discharge wire power supply unit (not shown) in the image forming device to transmit power to the discharge wire; a grid electrode 70, which is configured to contact with a grid power supply unit (not shown) in the image forming device, and a cleaning roller electrode 94, which is configured to contact with a cleaning roller power supply unit (not shown) in the image forming device. A right retaining component 40 is also provided on the right side of the photosensitive element box of the present invention. The specific structure of the right retaining component is as shown in FIG. Figure 6-7 shown.

[0037] The right retaining member 40 is preferably made of conductive resin material, and the photosensitive drum conductive member 40a is integrally formed with the right retaining member 40; of course, optionally, the right retaining member 40 can also be made of non-conductive resin material, and the photosensitive drum conductive member 40a is made of metal material, and is constructed to pass through the right retaining member 40 and be electrically connected to the photosensitive drum 80.

[0038] The outer side surface 40b of the right holding member 40 is formed in a roughly flat plate shape; the inner side of the right holding member 40 is formed with a third meshing portion 40c and a fourth meshing portion 40d, and the fourth meshing portion 40d is configured as two in this embodiment, and it can be designed as three or four as needed. The third meshing portion 40c and the fourth meshing portion 40d are both configured to install the right holding component 40 into the frame and fix it on the frame. The right holding component 40 also includes a right bearing accommodating portion 40e, which is formed in a roughly hollow cylindrical shape and is configured to protect and support the right bearing 82.

[0039] The installation method of the photosensitive element box of the present invention is to first assemble the components such as the photosensitive drum 80 and the cleaning roller 90 in the lower frame 10, then install the charging device to the upper frame 20, and then connect the upper frame 20 with the lower frame 10, and finally install the left retaining member 30 to the left side and the right retaining member 40 to the right side.

[0040] The photosensitive drum 80 extends in the axial direction and is provided with a first end 80a, a second end 80b separated from the first end 80a in the axial direction, and a cylindrical portion 80c located between the first end 80a and the second end 80b. The cylindrical portion 80c is made of a metal material and is roughly cylindrical in the axial direction. A photosensitive material layer is provided on the outer circumferential surface of the cylindrical portion. The first end 80a is located on the left side of the cylindrical portion 80c, and a photosensitive drum gear meshing protrusion 80d is provided thereon. The photosensitive drum gear 83 is provided with gear teeth and a photosensitive gear meshing groove 83a. The photosensitive drum gear 83 can be matched with the photosensitive drum gear protrusion 80d through the photosensitive gear meshing groove 83a, so that the photosensitive drum gear 83 is installed on the first end 80a. Of course, the photosensitive drum gear 83 can also be integrally formed with the first end 80a. The photosensitive drum gear 83 in this embodiment cannot rotate relative to the cylindrical portion 80c, and a plurality of gear teeth are formed on its outer circumference. The driving force receiving member 31 is also provided at the first end 80a, and can be engaged with a driving force conveying member (not shown) in the image forming apparatus to receive the driving force to drive the photosensitive drum 80 to rotate. Figure 2 or Fig.10 As shown, four connecting grooves are formed on the driving force receiving member 31, each of which is formed in a substantially U-shape. The second end 80b of the photosensitive drum is also made of a resin material and is configured to protrude outward from the right side of the cylindrical portion 80c in the axial direction.

[0041] Fig.11 and Fig.12The left bearing 81 is made of resin material, and includes a first photosensitive element receiving portion 81b, which is formed into a hollow cylindrical shape and can receive the first end 80a of the photosensitive drum; a cleaning roller gear receiving hole 81c, which is configured to cooperate with the cleaning roller gear 93 to accommodate and support the cleaning drum gear 93; an engaging claw 81e, which can be engaged with the first side wall 11; a U-shaped groove 81d for receiving the developing roller shaft in the developing box; a limiting protrusion 81a, which is configured to cooperate with the upper frame 20; a positioning block 81h; and a plurality of limiting ribs 81g, which can abut against the leftmost side of the photosensitive drum gear 83 to limit the photosensitive drum gear 83 from moving toward the left in the axial direction.

[0042] A left bearing receiving portion 11a is provided in the first side wall 11 in the lower frame 10, which is formed as a semicircular groove, and the shape matches the shape of the first receiving portion 81b of the photosensitive element of the left bearing; the lower frame is also provided with an engaging hole 11b for receiving the engaging claw 81e of the left bearing; the lower frame 10 is also provided with a positioning block receiving hole 11c.

[0043] When the left bearing 81 is installed in the lower frame, the photosensitive element first receiving portion 81b of the left bearing is accommodated by the left bearing receiving portion 11a, the engagement claw 81e is inserted into the engagement hole 11b, and the positioning block 81h is inserted into the positioning block receiving hole 11c, so that the left bearing 81 is stably installed in the first side wall 11 and cannot move relative to the first side wall. The left bearing 81 of the present invention is configured to be detachably installed in the lower frame 10, but optionally, the left bearing 81 can also be configured to be integrally formed with the lower frame 10.

[0044] The right bearing 82 is constructed as follows Fig.13 and Fig.14 As shown, the right bearing 82 is made of resin material, including a second photosensitive element receiving part 82a, which is formed into a hollow cylindrical shape and is used to cooperate with the second end 80b of the photosensitive drum, and can support and accommodate the second end 80b of the photosensitive drum; a limiting plane 82b, which can abut against the right end surface of the second end 80b, and is constructed to limit the movement of the photosensitive drum 80 toward the right side in the axial direction; a cleaning roller electrode receiving hole 82c, which is used to cooperate with the cleaning roller electrode 94, and can receive and accommodate the cleaning roller electrode 94. The structure of the right bearing 82 installed to the second side wall is basically the same as that of the left bearing 81. Both are installed to the positioning block receiving hole through the positioning block, and the engaging claw is installed in the engaging hole, which will not be repeated here.

[0045] Combination Figure 10-15 The following describes in detail the installation sequence and fixing method of each component on the lower frame 10:

[0046] First, the left bearing 81 is installed on the first side wall 11; the cleaning roller gear 93 is inserted into the cleaning roller gear receiving hole 81c, and the cleaning roller 90 is inserted into the cleaning roller gear 93 and fixed to the cleaning roller positioning column 17 of the lower frame at both ends; the photosensitive drum gear 83 is installed in the first end 80a of the photosensitive drum, and the photosensitive drum gear meshing protrusion 80d in the first end 80a is inserted into the photosensitive gear meshing groove of the photosensitive gear, and then the first end 80a of the photosensitive drum equipped with the photosensitive drum gear 83 is inserted into the photosensitive element The cleaning roller electrode 94 is inserted into the first receiving portion 81b; the cleaning roller electrode 94 is then inserted into the right end of the cleaning roller 90; the right bearing 82 is then installed into the second side wall 12, at which time the second receiving portion 82b of the photosensitive element cooperates with and supports the second end 80b of the photosensitive drum, and the limiting plane 82b on the right bearing abuts against the right end surface of the second end 80b, limiting the photosensitive drum 80 from moving to the right, and the cleaning roller electrode 94 cooperates with the cleaning roller electrode receiving hole 82c, and the cleaning roller electrode 94 is accommodated and supported by the cleaning roller electrode receiving hole 82c.

[0047] In the photosensitive element box of the present invention, the first end 80a of the photosensitive drum 80 is supported by the left bearing 81, and the second end 80b of the photosensitive drum is supported by the right bearing 82. The left bearing 81 limits the photosensitive drum from moving to the left, and the right bearing 82 limits the photosensitive drum from moving to the right; thus, the photosensitive drum 80 cannot move in the axial direction. Even when the photosensitive element box is installed in the image forming device, the driving force conveying device (not shown) in the image forming device extends axially to engage with the driving force receiving member 31 of the photosensitive drum and convey the driving force, the photosensitive drum 80 will not move because it is limited by the left bearing 81 and the right bearing 82, thereby preventing the technical problem of wear caused by axial movement of the photosensitive drum in the prior art. The photosensitive drum 80 can be stably located in the photosensitive element box, thereby ensuring that the photosensitive element box has good imaging quality.

[0048] In the present invention, the cleaning roller 90 is supported by the lower frame 10 as a rotatable member, and is used to clean the residual carbon powder on the surface of the photosensitive drum 80. A cleaning roller gear 93 is provided at the left end of the cleaning roller 90, and the cleaning roller gear 93 cannot rotate relative to the cleaning roller 90. When the driving force receiving member 31 receives the driving force and drives the photosensitive drum 80 to rotate, the photosensitive drum gear 83 rotates with the photosensitive drum 80. Because the cleaning roller gear 93 installed on the lower frame is meshed with the photosensitive drum gear 83, the photosensitive drum gear 83 drives the cleaning roller gear 93 to rotate, and the cleaning roller gear 93 drives the cleaning roller 90 to rotate. Since the cleaning roller 90 is in contact with the photosensitive drum 80, when the photosensitive drum 80 completes imaging, the residual carbon powder on the surface can be absorbed by the sponge of the cleaning roller 90 body and then on the surface of the photosensitive drum. The cleaning roller 90 needs to receive power from the image forming device so that the cleaning roller 90 is charged, so that it can better absorb the toner scraped from the surface of the photosensitive drum 80 to clean the surface of the photosensitive drum 80; the cleaning roller electrode 94 can be installed to the right end of the cleaning roller 90, so as to contact the cleaning roller electrode conveying device (not shown) in the image forming device to receive power.

[0049] The cleaning roller electrode 94 of the present invention is made of a conductive resin material. Optionally, the cleaning roller electrode 94 can also be made of a metal material. The material of the cleaning roller electrode 94 can be selected according to the specific molding process. The cleaning roller electrode 94 includes an electrical contact plane 94a and a cleaning roller end accommodating portion 94b, and a limiting claw portion 94c. The cleaning roller end accommodating portion 94b is formed as a hollow cylindrical portion 94b, which can cooperate with the right end of the cleaning roller 90 to accommodate and contact the right end of the cleaning roller 90. The cleaning roller electrode receiving hole 82c on the right bearing 82 can accommodate and support the cleaning roller end accommodating portion 94b, thereby limiting the movement of the cleaning roller electrode 94 in the up and down directions and the front and back directions; the limiting claw portion 94c is engaged with the right bearing receiving hole 82c, and the electrical contact plane 94a is in contact with the outer side surface of the right bearing 82, so that the cleaning roller electrode 94 is fixed by the right bearing 82 and cannot move relative to the right bearing 82. Moreover, as Figure 4 As shown, in this embodiment, when the upper frame 20 is mounted to the lower frame 10 and meshed with each other, a portion of the cleaning roller electrode 94 is abutted by the upper frame, and another portion is abutted by the lower frame, and the cleaning roller electrode 94 is further fixed by the upper frame 20 and the lower frame 10, and the cleaning roller electrode will not move relative to the upper frame. Therefore, the cleaning roller electrode 94 in this embodiment will neither move relative to the frame nor relative to the lower frame, and is stably set in the frame of the photosensitive element box.

[0050] The cleaning roller electrode 94 of the present invention is limited by the right bearing and will not move relative to the right bearing. The right bearing is installed and fixed in the lower frame, so the cleaning roller electrode will not move relative to the lower frame. Moreover, the cleaning roller electrode 94 is further limited by the upper frame 20 and the lower frame 10, and the cleaning roller electrode 94 cannot move relative to the frame, which solves the problem in the prior art that the cleaning roller electrode can move relative to the frame, resulting in poor contact with the cleaning roller power transmission device in the image forming device.

[0051] The upper frame 20 of the present invention defines a charging device and a charging device cleaning member 21. Fig.16 The upper frame 20 of the present invention is shown in FIG. The upper frame 20 includes a frame, a charging device, and a cleaning member 21 for cleaning the charging device. The upper frame 20 is defined in the axial direction by a third side wall 23 and a fourth side wall 24 separated from the third side wall in the axial direction, and a fifth wall 25 connecting the third side wall 23 and the fourth side wall 24. The cleaning member 21 can move relative to the fifth wall 25 in the axial direction. Fig.17 The figure shows an exploded view of the upper frame of the present invention. The charging device of the present invention includes: a discharge wire 73 and a grid 74 arranged opposite to the discharge wire 73 in the upper and lower directions of the frame. One end of the discharge wire 73 is fixed in the fifth wall 25, and the other end is connected to the discharge wire electrode 60. The discharge wire electrode 60 is constructed as a tension spring and is arranged in the fifth wall 25. The grid electrode 70 is placed on the fifth wall 25, one end of which is connected to the grid 74, and the other end of which can be fixed to the fifth wall 25 and can be connected to the grid electrode conveying device (not shown) in the image forming device. The grid 74, the discharge wire electrode 60, and the grid electrode 70 of the present invention can be limited and fixed by the electrode fixing device 71 so that the grid 74, the discharge wire electrode 60, and the grid electrode 70 will not be separated from the upper frame.

[0052] The cleaning member 21 may be mounted into the fifth wall 25 , and may be movable in the axial direction relative to the fifth wall 25 .

[0053] The cleaning member 21 includes an elastic member 21a and a supporting member 21b. The supporting member 21b is injection-molded from a resin material.

[0054] The elastic member 21a is constructed with a sponge. Of course, it can also be constructed with other elastic materials. The elastic member 21 can be attached to the support member 21b by double-sided adhesive or other materials, and cannot move relative to the support member 21a. When the surface of the grille 74 needs to be cleaned because of carbon powder or other substances adhering to it, as long as the cleaning member 21 is moved in the axial direction, the elastic member 21a maintains elastic contact with the surface of the grille 74, thereby removing impurities on the surface of the grille, and since the sponge is an elastic member, it will not damage the surface of the grille. This solves the problem that the cleaning member in the prior art cannot clean the surface of the grille, affecting the charging effect of the grille. Moreover, since the elastic material used can absorb the carbon powder on the surface of the grille, the problem that the hard scraper used in the prior art contacts the grille and easily damages the surface of the grille is solved.

[0055] The specific connection method of the upper frame 20 and the lower frame 10 in the photosensitive element box of the present invention is as follows:

[0056] like Fig.19 The left side of the photosensitive element box is a schematic diagram of the connection between the upper and lower frames. In the photosensitive element box of the present invention, the upper frame 20 is provided with a positioning groove 24a, a limiting groove 22 and a positioning block 23; the left side of the lower frame 10 is provided with a positioning column 14a, a limiting protrusion 81a, and a positioning boss 13a; when the upper frame 20 is installed on the lower frame 10, the positioning groove 24a in the upper frame 20 is engaged with the positioning column 14a in the lower frame, the limiting protrusion 81a is inserted into the limiting groove 22, and the positioning block 23 is engaged with the positioning boss 13a. Such a structure allows the upper frame 20 to be easily matched with the lower frame 10, and the connection method of the upper and lower frames is simple, which can simplify the structure of the upper frame and the lower frame.

[0057] The connection method of the upper frame and the lower frame on the right side of the photosensitive element box is basically the same as that on the left side. Of course, the connection method on the right side can also be appropriately changed as needed.

[0058] After the upper frame and the lower frame are engaged with each other, the left holding member 30 is installed in the lower frame, more specifically, the left holding member 30 is installed in the left bearing 81 and the first side wall 11. Figure 2The structure shown in the figure, and then the right retaining member 40 is installed to the second side. In the photosensitive element box with such a structure, the photosensitive drum driving force receiving member 31 is protected and supported by the left retaining member 30, and the left retaining member 30 is only installed to the lower frame 10, and does not need to be installed in the upper frame; therefore, the driving force receiving member 31 is completely supported by the lower frame 10 and is stably located in the lower frame 10. It does not produce the problem in the prior art that a part of the driving force receiving member 31 is supported by the upper frame and the other part is supported by the lower frame, so the connection method between the upper frame and the lower frame must be particularly stable, which leads to a complex connection method between the upper frame and the lower frame, and the molding process of the upper frame and the lower frame is more complicated. In the prior art, because the driving force receiving member 31 is fixed by the upper frame and the lower frame together, when the driving force receiving member 31 rotates, it may affect the stability of the charging device in the upper frame.

[0059] Therefore, in the photosensitive element cartridge of the present invention, the driving force receiving member is supported only by the lower frame, not by the upper frame, and can be stably located in the lower frame. Moreover, the rotation of the driving force receiving member will not affect the charging device in the upper frame. Moreover, this structure makes the connection between the upper and lower frames simple, and the molding process of the upper and lower frames is also simpler. This solves the technical problem that the driving force receiving member of the prior art is easily affected by the complicated connection between the upper and lower frames and the complicated molding process because the driving force receiving member is supported by the upper and lower frames together.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A photosensitive element box, include: A photosensitive drum configured to be rotatable about its own axis, the photosensitive drum having a first end and a second end separated from the first end in the axial direction; a driving force receiving member, disposed at the first end of the photosensitive drum, for driving the photosensitive drum to rotate; A charging device, capable of charging the surface of the photosensitive drum; A lower frame body, capable of supporting the photosensitive drum; An upper frame, capable of supporting the charging device; Characterized in that the photosensitive element box also includes: A first bearing member having a first receiving portion of a photosensitive element; A second bearing member having a second receiving portion of the photosensitive element; a holding component that holds the driving force receiving member in the lower frame; A cleaning roller, used for cleaning residual toner on the surface of the photosensitive drum; a cleaning roller electrode connectable to the cleaning roller; The first receiving portion of the photosensitive element is configured to receive the first end, and the second receiving portion of the photosensitive element is configured to receive the second end; The upper frame and the lower frame can be separated and engaged with each other along a direction perpendicular to the axial direction; The cleaning roller electrode is supported by the second bearing member.

2. The photosensitive element cartridge according to claim 1, It is characterized in that The lower frame is provided with a positioning column, a limiting protrusion and a positioning boss; the upper frame is provided with a positioning groove, a limiting groove and a positioning block; when the upper frame is connected to the lower frame, the positioning groove engages with the positioning column, the limiting protrusion is inserted into the limiting groove, and the positioning block engages with the positioning boss.

3. The photosensitive element cartridge according to claim 1, It is characterized in that The retaining member includes a driving force receiving member accommodating portion having a substantially cylindrical shape.

4. The photosensitive element cartridge according to claim 1, It is characterized in that The retaining member may be mounted in the first bearing member.

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