TWI437387B - Photosensitive drum of the conductive device - Google Patents

Description

Photoconductor drum conductive device

The present invention mainly discloses a conductive device, and more particularly to a conductive device for a photosensitive drum used in a printing system.

The photosensitive drum is the core of the printing technique, and has a special characteristic that the photosensitive drum is electrically conductive when exposed, but is an insulator when the photosensitive drum is not exposed to light.

The drum operation program mainly includes six steps of power distribution, exposure, development, transfer, cleaning and power removal. When the printing system receives the printing instruction, the cloth pole or the corona device is electrically connected to the photosensitive drum, so that the surface of the photosensitive drum is filled with a negative electric charge or a positive electric potential, and the processor of the printing system transmits the image data. The laser beam or the light-emitting diode beam is irradiated onto the photosensitive drum to form an exposure at a corresponding position, and the surface static charge at the exposure position is generated by the electron-hole pair generated by the charge generating layer in the photosensitive drum due to illumination. To neutralize the negative or positive charge on the surface of the drum, the area reaching the exposure is electrically neutral and no longer has an electrostatic charge. Then, since the toner has the same electric charge as the photosensitive drum, when the rapidly rotating photosensitive drum passes through the toner cartridge, the exposed portion absorbs the charged toner to further visualize the image. When the paper enters the inside of the printing system with a positive or negative charge opposite to the toner, the toner on the drum is transferred to the paper due to the attraction of the opposite sex. Finally, the residual toner on the photosensitive drum is cleaned, and the residual toner is cleaned by a doctor blade while removing static electricity, so that the potential of the surface of the photosensitive drum is returned to the initial state, so as to unfold the next loop motion.

In order to achieve the photosensitive property of the photosensitive drum and the insulating property when not exposed, the photosensitive drum may form a three-layer (or three or more) coating layer on the aluminum substrate, or may be formed on the aluminum substrate after the anode treatment. The coating layer of two layers (or two or more layers) is exemplified by a process of forming a three-layer coating layer on an aluminum substrate. The first layer is an adsorption layer or a resistive layer having a thickness of about >0.5 μm; the second layer is a photosensitive layer and a charge generating layer having a thickness of <1 μm. The composition of the layer is a dye, and the function is to generate an electron hole after exposure. The third layer is a conductive layer and a charge-conducting layer, and its thickness is 10~50μm. Its main purpose is to charge the charge and act as a protective layer of the photosensitive drum, and the positive or negative charge generated after exposure and the photosensitive drum The surface is negative or positively neutralized.

The first layer of coating applied on the aluminum substrate acts to adsorb and bond the coating, and the surface roughness of the aluminum substrate is changed by the first layer coating treatment, and the aluminum substrate is controlled by the aluminum substrate. Surface roughness prevents unwanted interference from incident laser light. And further increase the impedance value of the photosensitive drum, so that the photosensitive drum has a stored charge to maintain aging. During the process of charging, exposing, developing, and transferring the photosensitive drum, the electric charge that needs to be attached to the photosensitive drum can be continuously maintained until the transfer step. And when the laser beam is subjected to an exposure step, the laser beam can quickly remove the previously charged charge completely from the surface of the photosensitive drum.

A photosensitive drum having an anode treated layer and a two-layer coating layer, although the anode treatment can provide a better printing effect of the photosensitive drum, the cost of the anode treatment is quite high, and the cylindrical photosensitive drum is completely subjected to anodizing treatment. The cost is high, because of the large area of the relationship will reduce the yield. In addition, after the anode treatment of the drum is completed, it needs to be transported to another place for other coating operations. The handling process requires extreme care to avoid collision. If the drum after the anode treatment is bumped and has slight scratches or flaws, The drum is formed to be scrapped.

Further, the anode treatment is located on the bottom layer of the photosensitive drum, and when the other two coating layers are coated with a coating crucible, the photosensitive drum having a crucible is also scrapped and cannot be used.

Later, with the three-layer coating layer of the photosensitive drum, the first coating layer replaced the anodized layer based on the lower cost factor, and the first coating layer has the main effect of the anodized layer, but The first coating layer achieves poor performance. The first coating layer mainly has a "defect of the photosensitive drum which is subjected to a large current and is broken down" because the first coating layer is a coating technique, and the photosensitive drum area is large and the coating material is likely to be unevenly mixed. The local area is rendered low impedance, and the low impedance portion will form a short circuit and cause a large current to break down.

Referring to China Patent Publication No. 373593 "Photosensitive roller holder", a photosensitive roller fixing shaft hole is arranged in front of a main body, and a hollow recovery groove is formed on the back side, and includes: a toner recovery mechanism and A high-voltage line cleaning mechanism is combined; by the above mechanism, one of the following: the driving gear and the driven gear are driven by the rotating mechanism of the photosensitive drum to drive the recovery scraper to rotate, and when the scraper is used, the photosensitive drum is not transferred. After the toner is scraped off, the recycling scraper can scrape the toner into the recovery tank, and block the toner with a baffle to prevent the toner from falling on the photocopying paper; Second: the high-voltage wire cleaning mechanism The pull rod is pulled to one side. When the slide is pulled forward by the oblique side of the slide rail, the push piece will be retracted along the wall surface of the slide rail to force the two pressure plates to move inward respectively, and the cleaning block is pressed. Attached to the high-voltage line, when the sliding seat is pulled back and forth, the high-voltage line can be cleaned and wiped to achieve better use.

It can be known from the aforementioned patent that when the photosensitive drum is installed in the photosensitive drum, the photosensitive drum is provided with a driven gear, and it is driven by the transmission gear to generate a turning effect. In addition to the drive function, the driven gear acts as an important medium in the step of powering up.

The driven gear is connected to a metal shaft, and the driven gear is attached with a copper piece. The metal shaft simultaneously contacts the inner circumference of the copper piece, and the outer periphery of the copper piece contacts the photosensitive drum. When the metal shaft receives the external power transmission, the metal shaft is electrically contacted with the copper sheet, and the copper sheet is electrically contacted with the photosensitive drum to further complete the step of discharging.

The photosensitive drum currently in use can be changed to have conductive characteristics and have insulating properties. In order to provide the photosensitive drum with such characteristics, the coating layer on the photosensitive drum appears to be quite important, and the coating layer on the photosensitive drum is not allowed to have impurities, uneven thickness, and the like. Therefore, the process requirements of the photosensitive drum are extremely strict, and the cost of such a coating method is high. Furthermore, since the photosensitive roller has to repeat the loop of the six steps of the aforementioned photosensitive roller operation procedure, the performance of the photosensitive roller may be lowered after the photosensitive roller is used for a period of time, which may be due to a decrease in the efficiency of the electrical discharge, or The charge cannot be quickly and completely left from the photosensitive drum during exposure, so that the toner is not fixed enough, or the toner is not cleaned so that residual toner adheres to the photosensitive drum. When the photosensitive roller can not provide the initial working effect, the photosensitive roller must be replaced with a new one. However, in the cumbersome process of the photosensitive roller, directly replacing the photosensitive roller of the new product is undoubtedly a considerable burden for the consumer.

Accordingly, the present invention is intended to obviate or at least alleviate the problems encountered in the prior art.

The technical problem to be solved by the present invention is to provide a conductive device for a photosensitive drum in view of the deficiencies in the prior art.

The main technical improvement of the invention is that the conductive device has the function of controlling the magnitude of the current, and the conductive device directly provides an appropriate impedance capability, and can avoid excessive leakage current. Since the photosensitive drum has a plurality of coating layers, the coating layer belongs to a coating film mixture, which is a non-uniform material, and the coating film of the coating layer absorbs water, and the electric resistance value becomes low, resulting in deterioration of insulation and electric leakage. The conductive device of the present invention provides a uniform resistance value, and the impedance is not affected by changes in temperature and humidity, so that the conductive device is not affected by the coating 瑕疵 of the photosensitive drum, and is not affected by the ambient temperature and humidity, and can improve the quality of the conventional photosensitive drum. The lack of control is not easy. Moreover, the conductive device can avoid the breakdown problem of the photosensitive drum, and the resistance value of the conductive device has no local low impedance and the large current breakdown is lost. The conductive device of the present invention does provide the printing capability that meets the requirements.

The technical means for the secondary improvement of the present invention is that the resistor member has an impedance capability for the flow of current, and the resistor member can avoid the lack of breakdown of the photosensitive drum by a large current, and can avoid the occurrence of a short circuit.

Another technical means for improvement of the present invention is that the cost of the conductive device is much lower than the cost of the photosensitive drum, and even when the conductive device is worn out, the user can replace the less expensive conductive device to save printing cost. The effect.

Another technical means for improvement of the present invention is that the resistor member can be anodized in a sheet-like metal sheet, and the anodized metal sheet can be formed into a suitable shape and size by punching, and the resistor member can also be The tubular metal tube is anodized, and the anodized metal tube is re-cut to a suitable size. Such a forming method can surely reduce the cost compared with the anode of the entire photosensitive drum.

Other objects, advantages and novel features of the invention will be apparent from the description and appended claims.

The present invention has been described with reference to the preferred embodiments of the present invention, and the accompanying drawings are intended to be illustrative only, and are not limited by the structure.

1 , 2 and 3 are a perspective view, an exploded perspective view and a cross-sectional view of a photosensitive drum, a photosensitive drum and a conductive device of the present invention. The conductive device 1 of the present invention is axially coupled to the photosensitive drum 2 of the printing system, and the photosensitive drum 2 is disposed in the photosensitive drum 3. The conductive device 1 can be coupled to the photosensitive drum 2 which is not anodized. The two ends of the photosensitive drum 2 are respectively connected to the photosensitive drum 3 by the conductive device 1 and a shaft connector (not shown). 1 and the shaft joint have teeth on the outer circumference thereof, and can be further driven to rotate the photosensitive drum 2 by the transmission. The photosensitive drum 3 is provided with a metal shaft 301. The metal shaft 301 is disposed through the photosensitive drum 3 and the conductive device 1. The metal shaft 301 and the photosensitive drum 2 are electrically connected by the conductive device 1.

The conductive device 1 has the effect of controlling the magnitude of the current, and the conductive device 1 directly provides an appropriate impedance capability to avoid excessive leakage current. Since the photosensitive drum 2 has a plurality of coating layers, the coating layer belongs to a coating film mixture, which is a non-uniform material, and the coating film of the coating layer absorbs water, and the electric resistance value becomes low, resulting in deterioration of insulation and electric leakage. The conductive device 1 of the present invention provides a uniform resistance value, and the impedance is not affected by the temperature and humidity changes, so that the conductive device 1 is not affected by the coating 瑕疵 of the photosensitive drum 2, and is not affected by the ambient temperature and humidity, and can improve the conventional The photosensitive drum 2 is not easy to control the quality of the tube. Furthermore, the conductive device 1 can avoid the breakdown problem of the photosensitive drum 2, and the resistance value of the conductive device 1 has no local low impedance and causes a large current breakdown. The conductive device 1 of the present invention is indeed capable of providing a printing capability that meets the requirements.

4 and FIG. 5 are a perspective view and an exploded perspective view of a conductive device according to a first embodiment of the present invention. The conductive device 1 of the first embodiment of the present invention includes a receiving member 10 and a resistor member 20. The receiving member 10 can be tightly coupled to the inner edge of the photosensitive drum 2, and the receiving member 10 is coupled to the resistive member 20. The conductive device 1 further controls the magnitude of current flow by providing a current through the resistor 20 and generating an impedance.

6 and FIG. 7 are cross-sectional views showing a conductive device according to a first embodiment of the present invention. The receiving member 10 is coupled to the inner edge of the photosensitive drum 2. The receiving member 10 has a first end 101 and a second end 102. The outer edge of the receiving member 10 includes a pressing edge 11, a receiving groove 12 and a flange. 13 with a tooth portion 14. The flange 13 is located between the pressing edge 11 and the tooth portion 14 . The pressing edge 11 is adjacent to the receiving groove 12 . The receiving groove 12 is adjacent to the end surface of the first end 101 of the receiving member 10 . 14 is located at the second end 102. The receiving member 10 is axially provided with a through hole 15 penetrating the first end 101 and the second end 102. An end surface of the first end 101 of the receiving member 10 forms an attaching surface 16 , and a plurality of joint portions 17 are protruded from the mounting surface 16 .

The receiving member 10 can be disposed on the photosensitive drum 2, and the pressing edge 11 of the receiving member 10 is tightly disposed on the inner edge of the photosensitive drum 2. The flange 13 is disposed on the end surface of the photosensitive drum 2, and the tooth portion 14 is disposed. The end face of the second end 102 of the receiving member 10 abuts against the inner wall of the photosensitive drum 3, and the metal shaft 301 passes through the through hole 15 of the receiving member 10.

The resistor member 20 is an anodized metal such as aluminum metal, aluminum alloy or aluminum-magnesium alloy, which is in the form of a sheet and is approximately annular, and the anodized aluminum metal, aluminum alloy or aluminum-magnesium alloy can still transmit current and pass through the anode. After the treatment, the impedance capability of the current flow can be increased, and the resistor member 20 can avoid the absence of breakdown of the photosensitive drum 2 by a large current, and can avoid the occurrence of a short circuit. The resistor member 20 can be anodized in a sheet-like metal piece, and the anodized metal sheet is formed into a suitable shape and size by punching, and the forming method is anodized compared to the entire photosensitive drum 2 Words can really reduce costs.

The resistor member 20 is attached to the mounting surface 16 of the receiving member 10. The resistor member 20 includes an outer peripheral edge 21, a plurality of fixing holes 22 and an inner peripheral edge 23.

The outer peripheral edge 21 has an irregular shape, and the outer peripheral edge 21 protrudes from at least one first pin 24, and the first pin 24 of the outer peripheral edge 21 abuts against the inner edge of the photosensitive drum 2, and the first pin The first pin 24 is bent and can be received in the receiving slot 10 of the receiving member 10. In this embodiment, four first pins 24 are provided in the embodiment. .

The fixing hole 22 is sleeved on the joint portion 17 of the receiving member 10 , and the joint portion 17 can prevent the resistor member 20 from being detached from the receiving member 10 .

The inner circumference 23 has an irregular shape, and the inner circumference 23 protrudes from at least one second pin 25, and the inner circumference 23 forms at least two grooves 26, and the second pin 25 is located in the two grooves 26 The end portion of the second pin 25 further forms an abutting portion 251. The inner peripheral edge 23 is integrally formed in this embodiment. There are two second pins 25, and the inner circumference 23 forms a total of four grooves 26. The abutting portion 251 of the second leg 25 of the inner peripheral edge 23 abuts against the metal shaft 301. By virtue of the fact that the second pin 25 can be bent, the second pin 25 of the inner peripheral edge 23 can be reliably abutted against the metal shaft 301, thereby generating electrical conduction.

The metal shaft 301 is disposed through the through hole 15 and the inner periphery 23 of the resistor 20 . When the conductive device 1 is mounted on the photosensitive drum 2, the receiving member 10 is tightly attached to the photosensitive drum 2. When the conductive device 1 is mounted on the photosensitive drum 3, the resistor 20 is electrically connected to the metal shaft 301.

When the metal shaft 301 is energized, a current flows between the metal shaft 301, the resistor member 20, and the photosensitive drum 2, and the resistor member 20 provides an impedance such that the current flowing through the photosensitive drum 2 is smaller than the current of the metal shaft 301.

The magnitude of the current can be controlled by the resistor member 20. When the current conducted by the conductive device 1 has an impedance, the conductive device 1 provides an appropriate impedance capability, and improves the impedance capability of the photosensitive drum 2 due to loss of use for a period of time. Decline, and be able to provide the required printing capabilities. Moreover, the cost of the conductive device 1 is much lower than the cost of the photosensitive drum 2. Even when the conductive device 1 is worn out, the user can replace the less expensive conductive device 1 to save the printing cost.

Referring to FIG. 8, FIG. 9 and FIG. 10, a perspective view, an exploded perspective view and a cross-sectional view of a conductive device according to a second embodiment of the present invention are shown. Referring to FIG. 3 simultaneously, the conductive device 4 of the second embodiment of the present invention includes a receiving member 10, a resistor member 30 and a guide member 40. The receiving member 10 is the same as the first embodiment, and will not be further described herein. The receiving member 10 can be tightly coupled to the inner edge of the photosensitive drum 2, and the receiving member 10 sequentially joins the resistor member 30 and the guiding member 40. The resistor member 30 is disposed on the receiving member 10 and the guiding member 40. between. The conductive device 4 further controls the magnitude of current flow by the impedance generated by the resistor 30, and the guide 40 provides an efficient transfer current.

The resistor member 30 is anodized aluminum metal, aluminum alloy or aluminum-magnesium alloy, which is in the form of a sheet and is approximately annular. The anodized aluminum metal, aluminum alloy or aluminum-magnesium alloy can still transmit current and can be processed through the anode. The resistance of the current flowing through is increased, and the resistor member 30 can prevent the photoconductor drum 2 from being damaged by a large current and can avoid the occurrence of a short circuit. The resistor member 30 can be anodized in a sheet-like metal piece, and the anodized metal sheet is formed into a suitable shape and size by punching, and the forming method is anodized compared to the entire photosensitive drum 2 Words can really reduce costs. The resistor member 30 is attached to the mounting surface 16 of the receiving member 10. The resistor member 30 includes an outer peripheral edge 31, a plurality of fixing holes 32 and a receiving hole 33. The outer peripheral edge 31 has an irregular shape, and the outer peripheral edge 31 protrudes from at least one first pin 34. The first pin 34 of the outer peripheral edge 31 abuts against the inner edge of the photosensitive drum 2, and the first pin The first pin 34 is bent and can be received in the receiving slot 10 of the receiving member 10. In this embodiment, four first pins 34 are provided in the embodiment. . The fixing hole 32 is sleeved on the joint portion 17 of the receiving member 10. The hole 33 is sleeved on the metal shaft 301, and the hole 33 is not in contact with the metal shaft 301.

The guiding member 40 is a strip-shaped conductor and is approximately annular, and can transmit current efficiently. The guiding member 40 is made of a high-conductivity metal material such as copper, aluminum, silver, etc., and electrically connects the resistor member 30. . The guide 40 includes an inner periphery 41 and a plurality of fixing holes 42, which have an irregular shape. The inner circumference 41 protrudes from the at least one second pin 43 , and the inner circumference 41 forms at least two grooves 44 , and the second pin 43 is located between the two grooves 44 , by the groove 44 The end portion of the second pin 43 further defines an abutting portion 431. In the embodiment, the inner peripheral edge 41 has two second pins 43 protruding therefrom. And the inner circumference 41 forms a total of four grooves 44. The fixing hole 42 is sleeved on the joint portion 17 of the receiving member 10 , and the abutting portion 431 of the second leg 43 of the inner peripheral edge 41 abuts against the metal shaft 301 . The second pin 43 of the inner peripheral edge 41 can be reliably abutted against the metal shaft 301 by the characteristic that the second pin 43 can be bent, thereby generating electrical conduction.

The joint portion 17 is disposed in the fixing hole 32 of the resistor member 30 and the fixing hole 42 of the guide member 40. The joint portion 17 can prevent the resistor member 30 from being detached from the guide member 10 from the socket member 10.

The metal shaft 301 is disposed through the through hole 15, the hole 33 of the resistor 30, and the inner periphery 41 of the guide 40.

When the conductive device 4 is mounted on the photosensitive drum 2, the receiving member 10 is tightly mounted on the photosensitive drum 2, and the conductive device 4 is ensured that only the outer periphery 31 of the resistive member 30 is electrically connected to the photosensitive drum 2. . And only the inner periphery 41 of the guide 40 is electrically connected to the metal shaft 301.

When the metal shaft 301 is energized, a current flows between the metal shaft 301, the resistor member 30, the guide member 40 and the photosensitive drum 2, and the resistor member 30 provides an impedance such that the current flowing through the photosensitive drum 2 is smaller than that of the metal shaft 301. Current.

Referring to Figure 11, there is shown an exploded perspective view of a conductive device in accordance with a third embodiment of the present invention. Referring to FIG. 3 simultaneously, the conductive device 5 of the third embodiment of the present invention includes a receiving member 10, a guiding member 50 and a resistor member 60. The receiving member 10 is the same as the first embodiment, and will not be further described herein. The receiving member 10 can be tightly coupled to the inner edge of the photosensitive drum 2, and the receiving member 10 sequentially joins the guiding member 50 and the resistor member 60. The guiding member 50 is disposed on the receiving member 10 and the resistor member 60. between. The conductive device 5 provides an efficient transfer current effect by the guide member 50, and the impedance generated by the resistor member 60 further controls the magnitude of current flow.

The guiding member 50 is a strip-shaped conductor and is approximately annular, and can transmit current efficiently. The guiding member 50 is prepared from a high-conductivity metal material such as copper, aluminum, silver, etc., and the guiding member 50 is attached thereto. The mounting surface 16 of the receiving member 10 includes an outer peripheral edge 51, a plurality of fixing holes 52 and a receiving hole 53. The outer peripheral edge 51 has an irregular shape, and the outer peripheral edge 51 protrudes from at least one first pin 54 . The first pin 54 of the outer peripheral edge 51 abuts against the inner edge of the photosensitive drum 2 , and the first pin The first pin 54 is bent and can be received in the receiving slot 10 of the receiving member 10. In this embodiment, four first pins 54 are provided in the embodiment. . The fixing hole 52 is sleeved on the joint portion 17 of the receiving member 10. The hole 53 is sleeved with a metal shaft 301, and the hole 53 is not in contact with the metal shaft 301.

The resistor member 60 is anodized aluminum metal, aluminum alloy or aluminum-magnesium alloy, which is in the form of a sheet and is approximately annular. The anodized aluminum metal, aluminum alloy or aluminum-magnesium alloy can still transmit current and can be processed through the anode. The resistance of the current flowing through is increased, and the resistor 60 can prevent the photoconductor drum 2 from being damaged by a large current and can avoid the occurrence of a short circuit. The resistor member 60 can be anodized in a sheet-like metal piece, and the anodized metal sheet is formed into a suitable shape and size by punching, and the forming method is anodized compared to the entire photosensitive drum 2 Words can really reduce costs. The resistor 60 is electrically connected to the guide 50 and electrically connected. The resistor member 60 includes an inner periphery 61 and a plurality of fixing holes 62, and the inner periphery 61 has an irregular shape. The inner circumference 61 protrudes from the at least one second pin 63, and the inner circumference 61 forms at least two grooves 64. The second pin 63 is located between the two grooves 64, and the groove 64 is formed by the groove 64. The end portion of the second pin 63 further defines an abutting portion 631. In the embodiment, the inner peripheral edge 61 has two second pins 63. And the inner circumference 61 forms a total of four grooves 64. The fixing hole 62 is sleeved on the joint portion 17 of the receiving member 10 , and the abutting portion 631 of the second leg 63 of the inner peripheral edge 61 abuts against the metal shaft 301 . By virtue of the fact that the second pin 63 can be bent, the second pin 63 of the inner peripheral edge 61 can be reliably abutted against the metal shaft 301 to produce electrical conduction.

The joint portion 17 is disposed in the fixing hole 52 of the guide member 50 and the fixing hole 62 of the resistor member 60. The joint portion 17 can prevent the resistor member 60 from being detached from the guide member 10 from the guide member 10.

The metal shaft 301 is disposed through the through hole 15, the hole 53 of the guide member 50 and the inner periphery 61 of the resistor member 60.

When the metal shaft 301 is energized, a current flows between the metal shaft 301, the guide member 50, the resistor member 60 and the photosensitive drum 2, and the resistor member 60 provides an impedance such that the current flowing through the photosensitive drum 2 is smaller than that of the metal shaft 301. Current.

12, FIG. 13, and FIG. 14 are perspective external views, perspective exploded views, and cross-sectional views of a conductive device according to a fourth embodiment of the present invention. Referring to FIG. 3 simultaneously, the conductive device 6 of the fourth embodiment of the present invention includes a receiving member 10 and a resistor member 70. The receiving member 10 is the same as the first embodiment, and will not be further described herein. The receiving member 10 can be tightly coupled to the inner edge of the photosensitive drum 2, and the receiving member 10 is coupled to the resistive member 70. The conductive device 6 further controls the magnitude of current flow by the resistor 70 providing an impedance that is transmitted and generated.

The resistor 70 is an anodized aluminum metal, an aluminum alloy or an aluminum-magnesium alloy, and the anodized aluminum metal, aluminum alloy or aluminum-magnesium alloy can still transmit current and can increase the impedance capability of current flow after the anode treatment. The resistor member 70 can prevent the photoconductor drum 2 from being damaged by a large current and can avoid the occurrence of a short circuit. The resistor member 70 is attached to the mounting surface 16 of the receiving member 10. The resistor member 70 has a T-shape. The two ends are divided into a chip end 701 and a cylindrical end 702. The resistor member 70 includes a periphery. The edge 71, a plurality of fixing holes 72 and an inner periphery 73. The outer peripheral edge 71 is located at the sheet-like end 701. The outer peripheral edge 71 has an irregular shape. The outer peripheral edge 71 protrudes from at least one first pin 74. The first pin 74 of the outer peripheral edge 71 abuts against the photosensitive drum. When the first pin 74 is tightly disposed on the inner edge of the photosensitive drum 2, the first pin 74 is bent and can be accommodated in the receiving slot 12 of the receiving member 10. There are four first pins 74 in the example.

The fixing hole 72 is sleeved on the joint portion 17 of the receiving member 10.

The inner peripheral edge 73 penetrates the sheet-like end 701 and the cylindrical end 702. The cylindrical end 702 is disposed through the through hole 15 of the receiving member 10. The inner peripheral edge 73 is sleeved with the metal shaft 301 and the inner peripheral edge 73 is disposed. The metal shaft 301 produces electrical conduction.

The joint portion 17 is disposed through the fixing hole 72 of the resistor member 70. The joint portion 17 can prevent the resistor member 70 from being detached from the socket member 10.

The metal shaft 301 is disposed through the inner periphery 73 of the resistor member 70. The cylindrical end 702 of the resistor member 70 is disposed through the through hole 15. When the conductive device 6 is mounted on the photosensitive drum 2, the receiving member 10 is tightly mounted on the photosensitive drum 2. When the conductive device 6 is mounted on the photosensitive drum 3, the resistor 70 is electrically connected to the metal shaft 301.

When the metal shaft 301 is energized, a current flows between the metal shaft 301, the resistor 70, and the photosensitive drum 2, and the resistor 70 provides an impedance such that the current flowing through the photosensitive drum 2 is smaller than the current of the metal shaft 301.

15 and FIG. 16 are a perspective view, an exploded perspective view, and a cross-sectional view of a conductive device according to a fifth embodiment of the present invention. Referring to FIG. 3, the conductive device 7 of the fifth embodiment of the present invention includes a receiving member 10, a guiding member 50 and a resistor member 80. The receiving member 10 is the same as the first embodiment, and the guiding member 50 is the same as the third embodiment, and will not be further described herein. The receiving member 10 can be tightly coupled to the inner edge of the photosensitive drum 2, and the receiving member 10 sequentially joins the guiding member 50 and the resistor member 80. The conductive device 7 provides an efficient transfer current effect by the guide member 50, and the impedance generated by the resistor member 80 further controls the magnitude of current flow.

The resistor member 80 is an anodized aluminum metal, an aluminum alloy or an aluminum-magnesium alloy, and the anodized aluminum metal, aluminum alloy or aluminum-magnesium alloy can still transmit current and can increase the impedance capability of current flow after the anode treatment. The resistor member 80 can prevent the photoconductor drum 2 from being damaged by a large current and can avoid the occurrence of a short circuit. The resistor member 80 is attached to the guide member 50. The resistor member 80 has a T-shape. The two ends thereof are divided into a chip end 801 and a cylindrical end 802. The resistor member 80 includes a flange 81 and an inner portion. Peripheral 82. The flange 81 is located at the sheet end 801, and the inner periphery 82 penetrates the sheet end 801 and the cylindrical end 802. The cylindrical end 802 is disposed in the through hole 15 of the receiving member 10. The flange 81 is disposed on the guiding member 50. The inner peripheral edge 82 abuts the metal shaft 301 and the inner peripheral edge 82 contacts the metal shaft 301. Produces electrical conduction.

The joint portion 17 is disposed through the fixing hole 52 of the guide member 50. The joint portion 17 can prevent the guide member 50 from being detached from the receiving member 10.

The metal shaft 301 is disposed through the inner periphery 82 of the resistor member 80. The cylindrical end 802 of the resistor member 80 is disposed through the through hole 53 of the guide member 50. When the conductive device 7 is mounted on the photosensitive drum 2, the receiving member 10 is tightly attached to the photosensitive drum 2. When the conductive device 7 is mounted on the photosensitive drum 3, the resistor 80 is electrically connected to the metal shaft 301.

When the metal shaft 301 is energized, a current flows between the metal shaft 301, the resistor member 80, the guide member 50, and the photosensitive drum 2, and the resistor member 80 provides an impedance such that the current flowing through the photosensitive drum 2 is smaller than that of the metal shaft 301. Current.

18 and FIG. 19 are an exploded perspective view and a cross-sectional view showing a conductive device according to a sixth embodiment of the present invention. Referring also to FIG. 3, the conductive device 8 of the sixth embodiment of the present invention includes a receiving member 10, a resistor member 90 and a guide member 40. The receiving member 10 is the same as the first embodiment, and the guiding member 40 is the same as the second embodiment, and will not be further described herein. The receiving member 10 can be tightly coupled to the inner edge of the photosensitive drum 2, and the receiving member 10 sequentially joins the resistor member 90 and the guiding member 40. The resistor member 90 is disposed on the receiving member 10 and the guiding member 40. between. The conductive device 8 further controls the magnitude of current flow by the impedance generated by the resistor 90, which provides efficient transfer current.

The resistor member 90 is anodized aluminum metal, aluminum alloy or aluminum-magnesium alloy, which is in a ring shape, and the anodized aluminum metal, aluminum alloy or aluminum-magnesium alloy can still transmit current and can increase current circulation after being treated by the anode. The resistance of the resistor 90 prevents the photosensitive drum 2 from being subjected to a large current and the breakdown of the breakdown, and can avoid the occurrence of a short circuit. The resistor member 90 can be anodized by a tubular metal tube, and the anodized metal tube can be re-cut to a suitable size. Such a forming method can surely reduce the cost compared with the anode of the entire photosensitive drum. The resistor member 90 is sleeved on the first end 101 of the receiving member 10. The resistor member 90 includes an outer peripheral edge 91, a bore 92 and an end surface 93. The outer peripheral edge 91 is tightly disposed on the inner edge of the photosensitive drum 2 , and the through hole 92 is sleeved in the receiving groove 12 of the receiving member 10 .

The guiding member 40 is simultaneously attached to the end surface 93 of the resistor 90 and the mounting surface 16 of the receiving member 10 , and the guiding member 40 electrically conducts the resistor 90 . Moreover, the second pin 43 of the inner periphery 41 of the guide member 40 can reliably abut against the metal shaft 301 to generate electrical conduction.

When the conductive device 8 is mounted on the photosensitive drum 2, the receiving member 10 is tightly mounted on the photosensitive drum 2, and the conductive device 8 is ensured that only the outer peripheral edge 91 of the resistive member 90 is electrically connected to the photosensitive drum 2. . And only the inner periphery 41 of the guide 40 is electrically connected to the metal shaft 301.

When the metal shaft 301 is energized, a current flows between the metal shaft 301, the resistor member 90, the guide member 40, and the photosensitive drum 2, and the resistor member 90 provides an impedance such that the current flowing through the photosensitive drum 2 is smaller than that of the metal shaft 301. Current.

As far as the above is concerned, it can be concluded that the present invention has the following advantages:

1. The "conductive device of the photosensitive drum" of the present invention, the conductive device having the effect of controlling the magnitude of the current, the conductive device directly providing an appropriate impedance capability, and capable of avoiding excessive leakage current. Since the photosensitive drum has a plurality of coating layers, the coating layer belongs to a coating film mixture, which is a non-uniform material, and the coating film of the coating layer absorbs water, and the electric resistance value becomes low, resulting in deterioration of insulation and electric leakage. The conductive device of the present invention provides a uniform resistance value, and the impedance is not affected by changes in temperature and humidity, so that the conductive device is not affected by the coating 瑕疵 of the photosensitive drum, and is not affected by the ambient temperature and humidity, and can improve the quality of the conventional photosensitive drum. The lack of control is not easy. Moreover, the conductive device can avoid the breakdown problem of the photosensitive drum, and the resistance value of the conductive device has no local low impedance and the large current breakdown is lost. The conductive device of the present invention does provide the printing capability that meets the requirements.

2. The "conductive device of the photosensitive drum" of the present invention, which has an impedance capability for the flow of current, the resistor member can prevent the photosensitive drum from being subjected to a large current and the breakdown of the breakdown, and can avoid the occurrence of a short circuit.

3. The "conductive device of the photosensitive drum" of the present invention, the cost of the conductive device is much lower than the cost of the photosensitive drum, and even if the conductive device is worn out, the user can replace the cheaper conductive device to save printing The cost of the effect.

4. The "conductive device for a photosensitive drum" of the present invention, wherein the resistor member can be anodized in a sheet-like metal piece, and the metal piece after the anodization is formed into a suitable shape and size by punching, and the resistor member can also be used. The tubular metal tube is anodized, and the anodized metal tube is cut into a suitable size. Such a forming method can surely reduce the cost compared with the entire photosensitive drum for anodizing.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, so that the numerical value is changed or the equivalent element is replaced, or the equivalent of the scope of the patent application of the present invention. Changes and modifications are still within the scope of the invention patent.

1. . . Conductive device

2. . . Photosensitive drum

3. . . Photosensitive drum

301. . . Metal shaft

4. . . Conductive device

5. . . Conductive device

6. . . Conductive device

7. . . Conductive device

8. . . Conductive device

10. . . Receiving piece

101. . . First end

102. . . Second end

11. . . Tight edge

12. . . Crate

13. . . Burst

14. . . Tooth

15. . . perforation

16. . . Mounting surface

17. . . combination

20. . . Resistor

twenty one. . . Peripheral periphery

twenty two. . . Fixed hole

twenty three. . . Inner circumference

twenty four. . . First pin

25. . . Second pin

251. . . Conflicting part

26. . . Groove

30. . . Resistor

31. . . Peripheral periphery

32. . . Fixed hole

33. . . Hole

34. . . First pin

40. . . Guide

41. . . Inner circumference

42. . . Fixed hole

43. . . Second pin

431. . . Conflicting part

44. . . Groove

50. . . Guide

51. . . Peripheral periphery

52. . . Fixed hole

53. . . Hole

54. . . First pin

60. . . Resistor

61. . . Inner circumference

62. . . Fixed hole

63. . . Second pin

631. . . Conflicting part

64. . . Groove

70. . . Resistor

701. . . Flaky end

702. . . Cylindrical end

71. . . Peripheral periphery

72. . . Fixed hole

73. . . Inner circumference

74. . . First pin

80. . . Resistor

801. . . Flaky end

802. . . Cylindrical end

81. . . Burst

82. . . Inner circumference

90. . . Resistor

91. . . Peripheral periphery

92. . . Hole

93. . . End face

Figure 1 is a perspective view of the photosensitive drum, photosensitive drum and conductive device of the present invention.

Figure 2 is an exploded perspective view of the photosensitive drum, photosensitive drum and conductive device of the present invention.

Figure 3 is a cross-sectional view showing a photosensitive drum, a photosensitive drum, and a conductive device of the present invention.

Figure 4 is a perspective view of a conductive device according to a first embodiment of the present invention.

Figure 5 is an exploded perspective view of a conductive device according to a first embodiment of the present invention.

Figure 6 is a cross-sectional view showing a conductive device according to a first embodiment of the present invention, and showing a second pin of the table.

Figure 7 is a cross-sectional view showing a conductive device according to a first embodiment of the present invention, and a schematic view of a table joint member.

Figure 8 is a perspective view of a conductive device according to a second embodiment of the present invention.

Figure 9 is a perspective exploded view of a conductive device according to a second embodiment of the present invention.

Figure 10 is a cross-sectional view showing a conductive device of a second embodiment of the present invention.

Figure 11 is a perspective exploded view of a conductive device according to a third embodiment of the present invention.

Figure 12 is a perspective view of a conductive device according to a fourth embodiment of the present invention.

Figure 13 is a perspective exploded view of a conductive device according to a fourth embodiment of the present invention.

Figure 14 is a cross-sectional view showing a conductive device according to a fourth embodiment of the present invention.

Figure 15 is a perspective view of a conductive device according to a fifth embodiment of the present invention.

Figure 16 is a perspective exploded view of a conductive device according to a fifth embodiment of the present invention.

Figure 17 is a cross-sectional view showing a conductive device according to a fifth embodiment of the present invention.

Figure 18 is an exploded perspective view of a conductive device according to a sixth embodiment of the present invention.

Figure 19 is a cross-sectional view showing a conductive device according to a sixth embodiment of the present invention.

1. . . Conductive device

10. . . Receiving piece

101. . . First end

102. . . Second end

11. . . Tight edge

12. . . Crate

13. . . Burst

14. . . Tooth

15. . . perforation

16. . . Mounting surface

17. . . combination

20. . . Resistor

twenty one. . . Peripheral periphery

twenty two. . . Fixed hole

twenty three. . . Inner circumference

twenty four. . . First pin

25. . . Second pin

251. . . Conflicting part

26. . . Groove

Claims (26)

A conductive device for a photosensitive drum, comprising: a receiving member coupled to the photosensitive drum, the receiving member is axially provided with a through hole, a metal shaft of the photosensitive drum is disposed through the through hole; and a resistor member is a The anode-treated metal includes an outer peripheral edge and an inner peripheral edge that abuts against an inner edge of the photosensitive drum, the inner peripheral edge abutting against the metal shaft of the photosensitive drum. The conductive device of the photosensitive drum according to claim 1, wherein the outer periphery protrudes from at least one first pin, and the first pin of the outer periphery abuts against an inner edge of the photosensitive drum, the inner periphery is protruded At least one second pin that abuts against the metal shaft. The conductive device of the photosensitive drum of claim 2, wherein the inner circumference forms at least two grooves, and the second pin is located between the two grooves, and the second pin is provided by the groove The end of the second pin further forms an abutting portion. The conductive device of the photosensitive drum according to any one of claims 1 to 3, wherein the resistive member is an anodized aluminum metal, an aluminum alloy or an aluminum-magnesium alloy, which is in the form of a sheet and is approximately annular. The conductive device of the photosensitive drum of claim 1, wherein the two ends of the resistor are divided into a sheet end and a cylindrical end, the outer periphery is located at the sheet end, and the outer periphery is provided with at least one first a pin, the first pin of the outer periphery abuts against an inner edge of the photosensitive drum, the cylindrical end is disposed through the through hole of the receiving member, the inner periphery sleeves the metal shaft and the inner periphery abuts the metal shaft. The conductive device of the photosensitive drum according to claim 1 or 5, wherein the resistor member is an anodized aluminum metal, an aluminum alloy or an aluminum-magnesium alloy, which has a T-shape. The conductive device of the photosensitive drum according to claim 1, wherein the end surface of the receiving member protrudes from the plurality of joint portions, and the resistor member comprises a plurality of fixing holes, and the fixing holes are sleeved on the joint portion of the receiving member. The conductive device of the photosensitive drum according to claim 1, wherein the outer edge of the receiving member comprises a pressing edge, a receiving groove, a flange and a tooth portion, the flange is located at the pressing edge and the tooth portion. The pressing edge is adjacent to the pocket, and the pressing edge is tightly disposed on the inner edge of the photosensitive drum, and the flange is disposed on the end surface of the photosensitive drum, and the tooth portion can engage the transmission of the photosensitive drum gear. A conductive device for a photosensitive drum, comprising: a receiving member coupled to the photosensitive drum, the receiving member is axially provided with a through hole, a metal shaft of the photosensitive drum is disposed through the through hole; and a resistor member is a An anodized metal, the resistor member includes an outer peripheral edge that abuts against an inner edge of the photosensitive drum; a guide member electrically conductive to the resistor member, the guide member including an inner periphery, the inner peripheral edge being abutted The metal shaft of the photosensitive drum. The conductive device of the photosensitive drum according to claim 9, wherein the resistor member comprises a hole, and the hole is sleeved on the metal shaft. The conductive device of the photosensitive drum of claim 10, wherein the outer periphery protrudes from at least one first pin, and the first pin of the outer periphery abuts against an inner edge of the photosensitive drum, the inner periphery is protruded At least one second pin that abuts against the metal shaft. The conductive device of the photosensitive drum of claim 11, wherein the inner circumference forms at least two grooves, and the second pin is located between the two grooves, and the second pin is provided by the groove The end of the second pin further forms an abutting portion. The conductive device of the photosensitive drum according to any one of claims 9 to 11, wherein the resistive member is an anodized aluminum metal, an aluminum alloy or an aluminum-magnesium alloy which is in the form of a sheet and is approximately annular. The conductive device of the photosensitive drum of claim 9, wherein the end surface of the receiving member protrudes with a plurality of joint portions, the resistor member comprises a plurality of fixing holes, the guide member comprises a plurality of fixing holes, and the joint portion is disposed through The fixing hole of the resistor member and the fixing hole of the guiding member can prevent the resistor member from being separated from the guiding member from the receiving member. The conductive device of the photosensitive drum according to claim 9, wherein the outer edge of the receiving member comprises a pressing edge, a receiving groove, a flange and a tooth portion, the flange is located at the pressing edge and the tooth portion The pressing edge is adjacent to the pocket, and the pressing edge is tightly disposed on the inner edge of the photosensitive drum, and the flange is disposed on the end surface of the photosensitive drum, and the tooth portion can engage the transmission of the photosensitive drum gear. The conductive device of the photosensitive drum of claim 9, wherein the receiving member has a first end and a second end, the end surface of the first end of the receiving member forms an attaching surface, and the resisting member comprises a hole and an end surface The receiving hole is sleeved on the receiving member, and the guiding member is simultaneously attached to the end surface of the resisting member and the attaching surface of the receiving member. The conductive device of the photosensitive drum according to claim 9 or 16, wherein the resistor member is an anodized aluminum metal, an aluminum alloy or an aluminum-magnesium alloy, which is annular. A conductive device for a photosensitive drum, comprising: a receiving member coupled to the photosensitive drum, the receiving member is axially provided with a through hole, the metal shaft of the photosensitive drum is disposed through the through hole; and a guiding member includes a guiding member The outer periphery is opposite to a hole, the outer periphery abuts against the inner edge of the photosensitive drum, the hole is sleeved on the metal shaft; and a resistor member is an anodized metal, the resistor member includes an inner circumference and an inner circumference A metal shaft that is placed against the photosensitive drum. The conductive device of the photosensitive drum of claim 18, wherein the outer periphery protrudes from at least one first pin, and the first pin of the outer periphery abuts against an inner edge of the photosensitive drum, the inner periphery is protruded At least one second pin that abuts against the metal shaft. The conductive device of the photosensitive drum of claim 19, wherein the inner circumference forms at least two grooves, and the second pin is located between the two grooves, and the second pin is provided by the groove The end of the second pin further forms an abutting portion. The conductive device of the photosensitive drum according to any one of claims 18 to 20, wherein the resistive member is an anodized aluminum metal, an aluminum alloy or an aluminum-magnesium alloy which is in the form of a sheet and is approximately annular. The conductive device of the photosensitive drum according to claim 21, wherein the end surface of the receiving member protrudes with a plurality of joint portions, the guide member includes a plurality of fixing holes, and the resistor member comprises a plurality of fixing holes, and the joint portion is disposed through The fixing hole of the guiding member and the fixing hole of the resistor member prevent the guiding member from being detached from the receiving member from the resistor member. The conductive device of the photosensitive drum according to claim 18, wherein the resistor member is divided into a chip end and a cylindrical end, the resistor member includes a flange, and the flange is located at the chip end. The peripheral edge penetrates the sheet end and the cylindrical end, and the cylindrical end passes through the through hole of the receiving member, and the flange is disposed on the guide. The conductive device of the photosensitive drum according to claim 18 or 23, wherein the resistor member is an anodized aluminum metal, an aluminum alloy or an aluminum-magnesium alloy, which is T-shaped. The conductive device of the photosensitive drum of claim 24, wherein the end surface of the receiving member protrudes with a plurality of joint portions, the guide member includes a plurality of fixing holes, and the joint portion is disposed through the fixing hole of the guide member, the combination The portion can prevent the guide from coming off the receiving member. The conductive device of the photosensitive drum of claim 18, wherein the outer edge of the receiving member comprises a pressing edge, a receiving groove, a flange and a tooth portion, the flange being located at the pressing edge and the tooth portion The pressing edge is adjacent to the pocket, and the pressing edge is tightly disposed on the inner edge of the photosensitive drum, and the flange is disposed on the end surface of the photosensitive drum, and the tooth portion can engage the transmission of the photosensitive drum gear.