JP2016033579A5 - - Google Patents

Description

The present invention is made to solve the above problems, it is an object of providing an image forming apparatus capable of accurately determining the state of the cartridge mounted, carrying out the operation corresponding to the cartridge that will be mounted To do.

In order to achieve the above object, a typical configuration of an image forming apparatus according to the present invention includes a rotatable image carrier on which an electrostatic latent image is formed, and a charging unit that contacts and charges the image carrier. , an instrumentation wearing an image forming apparatus of the cartridge having a separating member for separating the charging unit from the image bearing member, by the movement of the spacer member according to the rotation of the image bearing member after the cartridge mounting, the charging unit is configured to abut with the image bearing member, and detection knowledge means by applying a voltage to said charging means you detect a current flowing from said charging means to said image bearing member, said cartridge is mounted And determining means for determining whether the mounted cartridge is new or old based on a detection result of the detecting means at the time .

According to the present invention, to determine the state of the cartridge mounted, the operation corresponding to the cartridge mounted can real Hodokosuru.

That is, the feedback current detection circuit 2 starts detecting the feedback current I flowing through the resistor 520. When the third voltage value Vs3 shown in FIG. 12 is generated at both ends of the resistor 520 from the time when the feedback current I flowing through the resistor 520 is greater than or equal to the third current value Is3 flowing through the resistor 520 (third current value). Value or more). Until the elapsed time Tb (timing) is early rather detect than a threshold time Ts1 of the first timing set in advance (short) when the process cartridge 200 after the start of use by the controller 600 (formerly article ).

In addition, the charging bias voltage Vt is applied to the charging roller 700 simultaneously with the rotation driving operation of the photosensitive drum 100 (in accordance with the rotation of the photosensitive drum 100). Then, after the feedback current detection circuit 2 starts to detect the feedback current I flowing through the resistor 520, there is a timing when the feedback current I flowing through the resistor 520 becomes equal to or greater than the third current value Is3. In that case the timing is retarded rather detect than a threshold time Ts1 of the first timing set in advance, the process cartridge 200 by the controller 600 is determined to be unused (new).

Claims (16)

A rotatable image bearing member on which an electrostatic latent image is formed, a charging unit that charges in contact with said image bearing member, a separating member for separating the charging unit from the image bearing member, a cartridge having instrumentation a wearing an image forming apparatus,
The charging means is configured to come into contact with the image carrier by movement of the separation member by rotation of the image carrier after the cartridge is mounted,
A detection knowledge means you detect a current flowing from said charging means by applying a voltage to said charging means to said image bearing member,
A determining means for the cartridge on the basis of the detection result before dangerous knowledge means when mounted, to determine the old and new pre hear cartridges mounted,
An image forming apparatus comprising: The judgment unit may, prior to the image bearing member is rotated, when the detection means detects current is greater than the first current value, characterized by determining that the cartridge is the use goods The image forming apparatus according to claim 1. The judgment unit may, prior to the image bearing member is rotated, the case detection means is current has been detected is equal to or greater than the first second current one且smaller than the current value of said cartridge The image forming apparatus according to claim 2 , wherein the image forming apparatus is determined to be new. Said determination means determines that said image bearing member before the rotation, when the detection means is current has been detected is smaller than the second current value, the cartridge is not mounted to the image forming apparatus The image forming apparatus according to claim 3 . A storage means for storing the amount of pre-listen cartridges to be mounted,
Wherein when the determination means by the pre hear cartridges is determined to be new, the image forming apparatus according to claim 3, characterized in that resetting the use amount stored in the storage means. It has an execution means for executing an initialization operation before listen cartridges to be mounted,
If the previous hear cartridges is determined to be new by the determining means, the image formation according to claim 3 or claim 5, characterized in that to run the initialization operation before asked cartridges by the execution means apparatus. It said determination means, wherein the image bearing member from the start of the rotation, the current which the sensing means is detected based on timing becomes greater than a predetermined current value, to determine the old and new pre-listen cartridges The image forming apparatus according to claim 1. The determining means is timing at which the above predetermined current value, if earlier than the first timing set in advance, to claim 7, characterized in that it is determined that the pre hear cartridges is the use goods The image forming apparatus described. The determining means, the predetermined current value or more becomes timing, if slower than the predetermined said first timing, according to claim 8, characterized in that it is determined that the cartridges are new Image forming apparatus. It said determination means when said first even after slow predetermined time than the timing does not reach the predetermined current value, according to claim 9, characterized in that it is determined that not the cartridges GaSo wear The image forming apparatus described in 1. A rotatable image bearing member on which an electrostatic latent image is formed, a charging unit that charges in contact with said image bearing member, a separating member for separating the charging unit from the image bearing member, a cartridge having instrumentation a wearing an image forming apparatus,
The charging means is configured to come into contact with the image carrier by movement of the separation member by rotation of the image carrier after the cartridge is mounted,
Transfer means for transferring a toner image formed on the surface of the image carrier to a transfer material;
The voltage applied to the charging means and said transferring means, and test Shitte stage you detect the current flowing to the image bearing member,
A determination unit for determining whether the mounted cartridge is new or old based on a detection result of the detection unit when the cartridge is mounted ;
An image forming apparatus comprising Rukoto to have a. A rotatable image carrier on which an electrostatic latent image is formed, and charging means for charging in contact with the image carrier;
An image forming apparatus capable of mounting a cartridge having a separating member that separates the charging unit from the image carrier ,
A detecting means for detecting a current flowing from the charging means to the image carrier by applying a voltage to the charging means ;
The charging means is configured to come into contact with the image carrier by the movement of the separation member by the rotation of the image carrier after the cartridge is mounted ,
An image forming apparatus, comprising: resetting information relating to a usage amount of the cartridge to be mounted based on a detection result of the detection unit when the cartridge is mounted . 13. The image forming apparatus according to claim 12, wherein the information regarding the usage amount of the cartridge is the number of recording media that have passed through the mounted cartridge . 13. The image forming apparatus according to claim 12, wherein the information on the usage amount of the cartridge is a rotation time of the image carrier of the mounted cartridge . 13. The information on the usage amount of the mounted cartridge is reset based on a detection result detected by the detection means before the image carrier rotates after the cartridge is mounted. 15. The image forming apparatus according to any one of items 14 to 14 . After the image carrier starts to be rotated after the cartridge is mounted, the information on the usage amount of the cartridge to be mounted is reset based on the timing at which the current detected by the detection unit becomes equal to or higher than a predetermined current value. The image forming apparatus according to claim 12, wherein the image forming apparatus is an image forming apparatus .