Organic photoconductive drum for laser printing

Abstract

The utility model discloses a laser printing organic photoconductive drum, which comprises a conductive substrate and a transmission gear, the inner wall of the end head of the conductive substrate is provided with a positioning hole along the radial direction, one end of the transmission gear is provided with an end shaft, the other end of the transmission gear is connected with a connecting cylinder, and a positioning rod penetrates through the connecting cylinder along the radial direction. The end, extending into the connecting cylinder, of the positioning rod is connected with a mounting seat through a supporting rod, a roller is rotationally connected into the mounting seat, a screw rod penetrates through the transmission gear and is in threaded connection with the transmission gear, one end of the screw rod is rotationally connected with a conical block, the conical block is tightly attached to the roller, and the other end of the screw rod penetrates out of the end shaft. According to the utility model, when the screw rod is twisted, the conical block can be driven to extrude the roller, so that the positioning rod is ejected out to be inserted into the positioning hole, the connection and the locking between the conductive substrate and the connecting cylinder are completed, the connection and the installation are more convenient, the disassembly and the maintenance are convenient, the transmission gear can be recycled, and the resource waste is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of photoconductive drums, in particular to a laser printing organic photoconductive drum. Background Technique

[0002] The organic photoconductive drum is the core component of the imaging system of laser printers and electrostatic copiers. Its working principle is as follows: Through corona charging or charging roller contact charging, a uniform layer of charge (positive charge or negative charge) can be applied to the surface of the OPC; when light of an appropriate wavelength irradiates the surface of the OPC drum, the charge generation material is excited to generate positive and negative charge pairs, and under the action of an electric field, the positive and negative charge pairs are separated. With the help of the charge transport material, the positive charge or negative charge is transported to the surface of the OPC drum, neutralizing part of the charge, and forming an electrostatic latent image on the surface of the OPC drum; after development, transfer, and fixing, the printed graphics and texts are finally obtained.

[0003] At present, the organic photoconductive drum mainly consists of two components: a conductive substrate and a driving gear. Among them, the connection method between the conductive substrate and the driving gear is usually to apply glue on the inner wall of the substrate or on the gear, and connect through the glue. The production process of this glue connection method is difficult to control. Often, due to inaccurate control of the glue application amount, the bonding force is inconsistent, and the connected products are difficult to separate. This not only causes difficulties in disassembly and maintenance, but also leads to the problem that the driving gear cannot be recycled when the conductive substrate is replaced.

[0004] Therefore, we propose a laser printing organic photoconductive drum to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a laser printing organic photoconductive drum to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A laser printing organic photoconductive drum includes a conductive substrate and a driving gear. A conductive coating is provided on the surface of the conductive substrate. A positioning hole is provided along the radial direction on the inner wall of the end of the conductive substrate. One end of the driving gear is provided with an end shaft, and the other end is connected with a connecting cylinder for inserting into the end of the conductive substrate. A positioning rod for inserting into the positioning hole is radially penetrated through the outer edge of the connecting cylinder. One end of the positioning rod extending into the connecting cylinder is connected with a mounting seat through a support rod. A roller is rotatably connected in the mounting seat, and a spring is also installed between the mounting seat and the connecting cylinder. A screw rod is penetrated and threadedly connected in the driving gear. One end of the screw rod is rotatably connected with a tapered block, and the tapered block is in close fit with the roller. The other end of the screw rod passes through the end shaft and is installed with an internal hexagonal disc.

[0008] In a further embodiment, a guide groove is axially formed at the outer port of the end of the conductive substrate, and the guide groove communicates with the positioning hole.

[0009] In a further embodiment, an annular stepped groove is formed inside the end of the conductive substrate, and the size of the outer port of the end of the conductive substrate gradually decreases towards the size inside the stepped groove.

[0010] In a further embodiment, the connecting cylinder adopts a frustum-shaped structure, and when the connecting cylinder is inserted into the inside of the end of the conductive substrate, the end of the connecting cylinder is in close fit with the stepped groove.

[0011] In a further embodiment, two positioning holes are symmetrically arranged with respect to the axis line of the conductive substrate, and two positioning rods, two support rods, two mounting seats, two rollers and two springs are respectively arranged corresponding to the two positioning holes.

[0012] In a further embodiment, a concave annular groove is formed on the surface of the roller, and a convex rib matching the concave annular groove is provided on the tapered block.

[0013] In a further embodiment, the positioning hole and the positioning rod adopt a mutually matching frustum-shaped structure.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] When the screw is rotated in the present utility model, the tapered block can be driven to squeeze the roller, so that the positioning rod is ejected through the support rod, so as to insert the positioning rod into the positioning hole, completing the connection and locking between the conductive substrate and the connecting cylinder, making the connection and installation between the conductive substrate and the transmission gear more convenient. It is not only convenient for later disassembly and maintenance, but also can recycle and reuse the transmission gear when replacing a new conductive substrate, avoiding waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a schematic diagram of the internal structure of the end of the conductive substrate of the present utility model;

[0018] Figure 3 is a schematic diagram of the internal structure of the connecting cylinder of the present utility model;

[0019] Figure 4 is a schematic semi-sectional view of the connection between the connecting cylinder and the end of the conductive substrate of the present utility model;

[0020] Figure 5 is a schematic diagram of the installation structure of the connecting cylinder, the tapered block and the positioning rod of the present utility model.

[0021] In the figure: 1, conductive substrate; 2, conductive coating; 3, transmission gear; 31, end shaft; 4, connecting cylinder; 5, positioning rod; 6, support rod; 7, mounting seat; 8, roller; 9, spring; 10, tapered block; 101, convex rib; 11, screw; 12, hexagon socket disc; 13, positioning hole; 14, guide groove; 15, stepped groove. Detailed implementation manners

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1-4, A laser printing organic photoconductive drum, comprising a conductive substrate 1 and a transmission gear 3. A conductive coating 2 is provided on the surface of the conductive substrate 1. A positioning hole 13 is provided radially on the inner wall of the end of the conductive substrate 1. One end of the transmission gear 3 is provided with an end shaft 31, and the other end of the transmission gear 3 is connected with a connecting cylinder 4 for inserting into the end of the conductive substrate 1. A positioning rod 5 for inserting into the positioning hole 13 is radially penetrated through the outer edge of the connecting cylinder 4. One end of the positioning rod 5 extending into the connecting cylinder 4 is connected with a mounting seat 7 through a support rod 6. A roller 8 is rotatably connected in the mounting seat 7. A spring 9 is also installed between the mounting seat 7 and the connecting cylinder 4. The spring 9 is sleeved around the support rod 6. A screw rod 11 is penetrated and threadedly connected in the transmission gear 3. One end of the screw rod 11 is rotatably connected with a tapered block 10, and the tapered block 10 is in close fit with the roller 8. The other end of the screw rod 11 passes through the end shaft 31 and is installed with an internal hexagonal disc 12, so that when the internal hexagonal disc 12 is rotated, the screw rod 11 is driven to rotate. During the rotation of the screw rod 11, it moves under the action of the thread, driving the tapered block 10 to move at the same time. One end of the tapered block 10 close to the screw rod 11 is wider and the other end is narrower. When the tapered block 10 moves towards the conductive substrate 1 side, it squeezes the roller 8, thereby driving the mounting seat 7, the support rod 6 and the positioning rod 5 to extend outwards relative to the connecting cylinder 4, so as to be easily inserted into the positioning hole 13 to complete the connection between the conductive substrate 1 and the connecting cylinder 4. On the contrary, when the screw rod 11 is rotated reversely, the screw rod 11 drives the tapered block 10 to retract. At this time, under the elastic force of the spring 9, the positioning rod 5 is driven to reset, so that it disengages from the positioning hole 13, making the connecting cylinder 4 and the conductive substrate 1 separable.

[0026] Please refer to Figure 2 and Figure 4 , An axial guide groove 14 is opened at the outer port of the end of the conductive substrate 1, and the guide groove 14 communicates with the positioning hole 13, and the depth of the guide groove 14 is less than the depth of the positioning hole 13. Through the guidance of the guide groove 14, it is convenient to better judge the position of the positioning hole 13 when inserting the connecting cylinder 4.

[0027] Please refer to Figures 2-4 , In order to improve the connection tightness, a ring-shaped stepped groove 15 is provided inside the end of the conductive substrate 1, and the size of the outer port of the end of the conductive substrate 1 gradually decreases towards the size inside the stepped groove 15, making it in a flared shape. At the same time, the connecting cylinder 4 adopts a frustum-shaped structure, which is matched with the flared shape. When the connecting cylinder 4 is inserted into the inside of the end of the conductive substrate 1, the end of the connecting cylinder 4 is in close fit with the stepped groove 15 to ensure the connection tightness between the connecting cylinder 4 and the conductive substrate 1. Further, the positioning hole 13 and the positioning rod 5 adopt a mutually matching frustum-shaped structure, so that the positioning rod 5 is more firmly and stably inserted into the positioning hole 13.

[0028] Please refer to Figures 3-5, there are two positioning holes 13 symmetrically arranged with respect to the axis line of the conductive base 1, and there are two positioning rods 5, support rods 6, mounting seats 7, rollers 8 and springs 9 respectively corresponding to the two positioning holes 13, so as to lock the connecting cylinder 4 and the conductive base 1 simultaneously from two symmetric sides, improve the connection firmness, and at the same time, the two groups of rollers 8 can also be driven to move by the same tapered block 10.

[0029] Please refer to Figure 5 , a concave annular groove is formed on the surface of the roller 8, and a convex rib 101 matching the concave annular groove is provided on the tapered block 10. By providing the concave annular groove and the convex rib 101, a limit is formed between the tapered block 10 and the roller 8 to prevent the tapered block 10 from being displaced and offset when moving and pressing the roller 8.

[0030] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0031] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A laser-printing organic photoconductive drum, comprising a conductive substrate (1) and a transmission gear (3), characterized in that: The surface of the conductive substrate (1) is provided with a conductive coating (2). A positioning hole (13) is radially provided on the inner wall of the end of the conductive substrate (1). One end of the transmission gear (3) is provided with an end shaft (31), and the other end is connected with a connecting cylinder (4) for inserting into the end of the conductive substrate (1). A positioning rod (5) for inserting into the positioning hole (13) is radially penetrated through the outer edge of the connecting cylinder (4). One end of the positioning rod (5) extending into the connecting cylinder (4) is connected with a mounting seat (7) through a support rod (6). A roller (8) is rotatably connected in the mounting seat (7), and a spring (9) is also installed between the mounting seat (7) and the connecting cylinder (4). A screw rod (11) is penetrated and threadedly connected in the transmission gear (3). One end of the screw rod (11) is rotatably connected with a tapered block (10), and the tapered block (10) is in close fit with the roller (8). The other end of the screw rod (11) passes through the end shaft (31) and is installed with an internal hexagonal disc (12).

2. A laser-printing organic photoconductive drum according to claim 1, characterized in that: An axial guide groove (14) is opened at the outer port of the end of the conductive substrate (1), and the guide groove (14) communicates with the positioning hole (13).

3. A laser-printing organic photoconductive drum according to claim 1, characterized in that: An annular stepped groove (15) is opened inside the end of the conductive substrate (1), and the size of the outer port of the end of the conductive substrate (1) gradually decreases towards the size inside the stepped groove (15).

4. A laser-printing organic photoconductive drum according to claim 3, wherein: The connecting cylinder (4) adopts a frustum-shaped structure. When the connecting cylinder (4) is inserted into the inside of the end of the conductive substrate (1), the end of the connecting cylinder (4) is in close fit with the stepped groove (15).

5. The organic photoconductive drum for laser printing according to claim 1, wherein: Two positioning holes (13) are symmetrically arranged about the axis of the conductive substrate (1), and two positioning rods (5), support rods (6), mounting seats (7), rollers (8) and springs (9) are respectively provided corresponding to the two positioning holes (13).

6. The organic photoconductive drum for laser printing according to claim 1, wherein: A concave annular groove is opened on the surface of the roller (8), and a convex rib (101) matching the concave annular groove is provided on the tapered block (10).

7. The organic photoconductive drum for laser printing according to claim 1, characterized in that: The positioning hole (13) and the positioning rod (5) adopt a mutually matching frustum-shaped structure.

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