WO2013034089A1 - Photosensitive drum connection gear and photosensitive drum - Google Patents

Abstract

A photosensitive drum connection gear comprises a gear body (100) and a conductive device (200) arranged in the gear body (100). The conductive device (200) comprises a main body (201), and an elastic protruding portion (202) and a conductive piece (203) arranged at two ends of the main body (201) respectively. The protruding portion (202) protrudes from a first end (601) of the gear body (100) and is adapted for contact with a contact (300) in a drive head. The conductive piece (203) protrudes from a second end (602) of the gear body (100), and contacts an end surface of the second end. A limit structure (204) is further arranged between the protruding portion (202) and the conductive piece (203), and the limit structure (204) abuts against an inner wall of the gear body (100). Also disclosed is a photosensitive drum having the photosensitive drum connection gear.

Description

 Drum connecting gear and drum

The present invention relates to the field of printer technology, and more particularly to a photosensitive drum connecting gear and a photosensitive drum having such a connecting gear for transmitting a driving force of a printer driving head. The present application claims priority to Chinese Patent Application No. 20112033839, filed on Sep. 09, 2011, which is incorporated herein by reference.

A toner cartridge and a drive head are generally disposed inside the laser printer for driving the photosensitive drum in the toner cartridge to rotate. When the toner cartridge is installed, the printer cover is opened, and the driving head that is in contact with the drum gear inside the printer is contracted in the axial direction of the photosensitive drum, and when the printer cover is closed, the driving head protrudes in the axial direction of the photosensitive drum. There is a cylindrical conductive column in the middle of the drive head of the printer, that is, the grounding contact, and the photosensitive drum is electrically connected thereto. In the prior art, the photosensitive drum conductive structure adopts a pin connection and the conductive position, and the position of the pin contacting the internal ground contact of the printer is substantially at the center of the gear end face. Since the pin has no elasticity, real-time elasticity cannot be achieved when contacting the ground contact of the printer. Contact, electrical connection reliability is low, which affects its service life, and the manufacturing cost of the plug is high.

The technical problem to be solved by the present invention is to provide a photosensitive drum connecting gear to overcome the above-mentioned lack of elasticity of the plug, and real-time elastic contact cannot be realized when contacting the ground contact of the printer, and the reliability of the electrical connection is low, thereby affecting its use. Defects in life.

The technical solution adopted by the present invention to solve the technical problem is to construct a photosensitive drum connecting gear, comprising a gear body and a conductive device disposed in the gear body, the gear body comprising a first body adapted to cooperate with a driving head And a second end connected to the drum body of the photosensitive drum, the conductive device comprising a body, elastic protrusions respectively disposed at two ends of the body, and a conductive sheet, the protrusion from the first end Extending and adapted to be in contact with a contact in the drive head, the conductive sheet extending from a second end of the gear body and in contact with an end surface of the second end; the raised portion and the conductive A limiting structure is further disposed between the sheets, and the limiting structure is in contact with the inner wall of the gear body.

In the photosensitive drum connecting gear of the present invention, the convex portion has a hook shape, and a side surface of the hook-shaped convex portion is adapted to be in contact with an outer cylindrical surface of the contact.

In the photosensitive drum connecting gear of the present invention, the height of the convex portion protruding from the end surface of the first end is 1-5 mm.

In the photosensitive drum connecting gear of the present invention, the plane of the conductive sheet is perpendicular to the plane of the main body such that the conductive sheet is in contact with the end surface of the second end. Further, a positioning post is disposed on the end surface of the second end, and the conductive sheet is provided with a positioning hole matched thereto.

The photosensitive drum connecting gear of the present invention, wherein the limiting structure comprises a fixed end disposed on the main body, and a free end extending outward from the fixed end, where the limiting structure is located The plane in which the body is located is at an angle such that the free end interferes with the inner wall of the gear body.

In the photosensitive drum connecting gear of the present invention, the fixed end is located at one end of the main body near the convex portion.

The photosensitive drum connecting gear embodying the present invention has the following advantageous effects: since the photosensitive drum connecting gear of the present invention employs an elastic convex portion and a conductive sheet, and the main body is used to electrically connect the two, the production cost and assembly complexity are reduced. degree. A limit structure is also provided on the main body to ensure a reliable elastic electrical connection.

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view showing the structure of an end portion of a photosensitive drum according to the present invention.

Figure 2 is a plan view showing the structure of the end portion of the photosensitive drum shown in Figure 1.

Figure 3 is an axial view of the structure of the end portion of the photosensitive drum shown in Figure 1.

Figure 4 is an exploded perspective view showing the structure of the end portion of the photosensitive drum shown in Figure 1.

Fig. 5 is a schematic view showing the cooperation of the connecting gear of the end portion of the photosensitive drum shown in Fig. 1 and the driving head.

Fig. 6 is a perspective view of the connecting gear shown in Fig. 5.

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in FIG. 1 to FIG. 4, in a preferred embodiment of the present invention, the photosensitive drum comprises a drum body 500 and a photosensitive drum connecting gear 600, and the photosensitive drum connecting gear 600 is connected and fixed to one end of the drum body 500, wherein the photosensitive drum The connecting gear 600 includes a hollow gear body 100 and a conductive device 200 disposed in the gear body 100.

As shown in FIG. 5, the photosensitive drum connecting gear 600 can be engaged with a driving head 400 provided inside the printer. The drive head 400 has a cylindrical shape and is provided with a recess 401 at one end thereof. Within the recess 401, a contact 300 for conducting is provided, which is located on the axis of the drive head 400.

As shown in FIG. 4, the gear body 100 of the photosensitive drum connecting gear 600 is disposed at one end of the drum body 500, and includes a first end 601 adapted to cooperate with the driving head 400, a second end 602 adapted to be coupled to the drum body 500, And an engagement portion 603 between the first end 601 and the second end 602. The end of the drum body 500 is sleeved and fixed outside the second end 602 of the gear body 100. On the first end surface 605 of the gear body 100, three studs 604 extending in the axial direction of the drum body 500 are disposed. The three protrusions 604 cooperate with the concave portion 401 of the driving head 400. When the driving head 400 rotates, the photosensitive drum connecting gear 600 is also rotated, and the drum body 500 is further driven to rotate.

As shown in FIGS. 5 and 6, the conductive device 200 includes a main body 201, elastic projections 202 and conductive sheets 203 respectively disposed at opposite ends of the main body 201. The raised portion 202 extends from the first end face 605 of the gear body 100 for contact with the contact 300. In order to better contact the boss 202 with the contact 300, the height of the boss 202 from the first end face 605 is 1-5 mm. The conductive sheet 203 protrudes from the second end 602 of the gear body 100 and is in contact with the second end surface 606 of the gear body 100. Preferably, the plane of the conductive sheet 203 is perpendicular to the plane in which the body 201 is located, so that the conductive sheet 203 can be better fitted with the second end surface 606 of the gear body 100 to enhance the conductive effect. The second end surface 606 is provided with a positioning post 607, and the conductive piece 203 is provided with a positioning hole 207 matched thereto. A limiting structure 204 is further disposed between the protruding portion 202 and the conductive sheet 203, and the limiting structure 204 is in contact with the inner wall of the gear body 100.

Further, the stop structure 204 in the preferred embodiment of the present invention includes a fixed end 205 disposed on the body 201 and a free end 206 extending outwardly from the fixed end 205. Moreover, the plane of the limiting structure 204 is at an angle with the plane of the main body 201, so that the free end 206 is in contact with the inner wall of the gear body 100, thereby better playing the role of grasping the inner wall surface of the gear body 100. The fixed end 205 is preferably disposed on the main body 201 near one end of the convex portion 202 in accordance with the mounting direction of the conductive device 200. When the toner cartridge is installed in the printer, the cover of the printer is opened, and the driving head 400 in the printer is contracted along the axial direction of the photosensitive drum to facilitate placing the photosensitive drum in the correct position; after that, the printer cover is closed, and the driving head 400 is driven. It projects in the axial direction of the photosensitive drum and cooperates with the gear body 100 at the end of the photosensitive drum, so that the photosensitive drum can be driven to rotate. The outer cylindrical surface of the contact 300 in the driving head 400 is in contact with the side surface of the convex portion 202, the convex portion 202 and the contact 300 are relatively statically moved, and the convex portion 202 is electrically connected to the conductive sheet 203 through the main body 201, and The conductive sheet 203 is in turn electrically coupled to the drum body 500, thereby electrically connecting the contacts 300 of the printer to the drum body 500. The limiting structure 204 enables the conductive device 200 to grasp the inner side wall of the gear body 100 when it is loaded into the gear body 100.

Since the photosensitive drum connecting gear of the present invention employs the elastic convex portion 202 and the conductive sheet 203, and the main body 201 is used to electrically connect the two, the production cost and assembly complexity are reduced. A limiting structure 204 is also disposed on the main body 201 to ensure a reliable elastic electrical connection.

The above embodiments are merely illustrative of the technical concept and the features of the present invention. The purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention without limiting the scope of the present invention. Equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the appended claims.

The photosensitive drum connecting gear and photosensitive drum of the present invention can be manufactured and used industrially. Since the photosensitive drum connecting gear adopts elastic projections and conductive sheets, and the main body is used to electrically connect the two, the production cost and assembly complexity are reduced. A limit structure is also provided on the main body to ensure a reliable elastic electrical connection. Therefore, the present invention has industrial applicability.

Claims (8)

The photosensitive drum connecting gear includes a gear body and a conductive device disposed in the gear body, the gear body including a first end adapted to cooperate with a driving head and a second end adapted to be coupled to the drum body of the photosensitive drum, The conductive device comprises a main body, elastic protrusions respectively disposed at two ends of the body, and a conductive sheet, the protrusion protruding from the first end of the gear body and adapted to The contact in the driving head contacts, the conductive sheet protrudes from the second end of the gear body and is in contact with an end surface of the second end; and the protrusion is further disposed between the conductive sheet a constrained structure that interferes with an inner wall of the gear body. A photosensitive drum connecting gear according to claim 1, wherein said convex portion has a hook shape, and a side surface of said hook-shaped convex portion is adapted to be in contact with an outer cylindrical surface of said contact. A photosensitive drum connecting gear according to claim 1, wherein said projection has a height of 1-5 mm protruding from an end surface of said first end. The photosensitive drum connecting gear according to claim 1, wherein a plane of the conductive sheet is perpendicular to a plane of the main body, so that the conductive sheet is attached to an end surface of the second end of the gear body. . The photosensitive drum connecting gear according to claim 4, wherein the end surface of the second end is provided with a positioning post, and the conductive sheet is provided with a positioning hole matched thereto. A photosensitive drum connecting gear according to claim 1, wherein said stopper structure comprises a fixed end provided on said main body, and a free end extending outward from said fixed end, said limit structure The plane is at an angle to the plane of the body such that the free end interferes with the inner wall of the gear body. A photosensitive drum connecting gear according to claim 6, wherein said fixed end is located at an end of said main body adjacent said convex portion. a photosensitive drum including a drum body and a photosensitive drum connecting gear, wherein the photosensitive drum connecting gear is fixedly coupled to one end of the drum body, wherein the photosensitive drum connecting gear is according to any one of claims 1 to The drum is connected to the gear.

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