JPH0427467U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view of an embodiment of an image forming apparatus according to the present invention, FIG. 2 is a block diagram of an embodiment of the image forming apparatus according to the present invention as described in claims 1 and 2, and FIG. 4 is a block diagram of an embodiment of the image forming apparatus according to the present invention as claimed in claims 3 and 4, FIG. 4 is a block diagram of an embodiment of the image forming apparatus according to the invention as claimed in claim 5, and FIG. 6 is a plan view of the operation panel of the same embodiment, FIG. 6 is a cross-sectional view of essential parts of an embodiment of the image forming apparatus according to the present invention as set forth in claims 3, 4, and 5, and FIG. 7 is a diagram showing latent image potential and development. A graph showing the relationship between agent concentrations, FIG. 8 is a side view showing another example of the regulating means of an embodiment of the image forming apparatus according to the present invention, and FIG. 9 is an embodiment of the image forming apparatus according to the present invention. FIG. 10 is a plan view showing another example of the abutting means, and FIG. 10 is a sectional view of a main part of a conventional image forming apparatus. 1...Photosensitive drum, 3...Developing roller, 5...
...developing device, 8...biasing means, 9...abutting means,
10... regulating means, 11... piezoelectric element, 12...
Instructing means, 13... Length measuring means, 14, 15, 16
...Control means, 17...Storage element.

Claims (1)

[Claims for Utility Model Registration] (1) A photoreceptor drum on which a visible image is formed by a developer from a latent image formed on its surface, and a photoreceptor drum in which the developer is attached to the photoreceptor drum by a developing roller. In an image forming apparatus equipped with a developing device that performs development and a biasing means that biases the developing device toward the photoconductor drum, the device is installed at a location that has a certain positional relationship with the photoconductor drum, and expands and contracts. a contacting means provided in the developing device and in contact with the regulating means; an instruction means provided in the image forming apparatus main body for instructing the image quality of the image; and an instruction means based on instruction information of the instruction means and a control means for expanding and contracting the regulating means. (2) The image forming apparatus according to claim 1, wherein the regulating means is a piezoelectric element. (3) The control means further includes length measuring means for rotating the photosensitive drum at least once and measuring the distance between the photosensitive drum surface and the developing roller, and the control means is configured to rotate the photosensitive drum at least once and measure the distance between the photosensitive drum surface and the developing roller, 2. The image forming apparatus according to claim 1, further comprising a memory element that stores the obtained interval, and expands and contracts the regulating means based on the content. (4) The image forming apparatus according to claim 3, wherein the length measuring means is a laser length measuring means. (5) a photosensitive drum on which a visible image is formed using a developer from a latent image formed on its surface; a developing device that causes the developer to adhere to the photosensitive drum using a developing roller; In an image forming apparatus, the image forming apparatus includes a biasing means for biasing the device toward the photoreceptor drum, and a regulating means that is attached to a position having a certain positional relationship with the photoreceptor drum and is extendable and retractable; abutting means provided on the apparatus and abutting the regulating means; an indicating means provided on the main body of the image forming apparatus for instructing the image quality; and a measuring means for measuring the distance between the photosensitive drum and the developing roller. An image forming apparatus comprising: a length means; and a control means for controlling the regulating means based on the instruction information of the instruction means and the length measurement result of the length measuring means.