Sheet feeding device and image forming device

A sheet feeding device comprising:

• a sheet feeding cassette which is switchable between a mounted state, in which the sheet feeding cassette is mounted to a sheet feeding cassette mounting portion on an image forming device body, and a pulled-out state, in which the sheet feeding cassette has been pulled out from the sheet feeding cassette mounting portion, wherein
• a detector is provided that makes contact with a paper sheet stored in the sheet feeding cassette and detects a paper sheet amount,
• the detector includes
• a first member that makes contact with an upper surface of the paper sheet stored in the sheet feeding cassette, and
• a second member that supports the first member such that the first member is capable of changing postures, while also movably supporting the first member in an up-and-down direction to coincide with the upper surface of the paper sheet stored in the sheet feeding cassette,
• the first member includes a guide portion that makes contact with the sheet feeding cassette, which is moved to switch between the mounted state and the pulled-out state, and/or the paper sheet stored in the sheet feeding cassette, and the first member changes a posture with respect to the second member as a result of the guide portion making contact with the sheet feeding cassette, which is moved to switch between the mounted state and the pulled-out state, and/or the paper sheet stored in the sheet feeding cassette,
• the second member includes a restriction portion that restricts a posture change of the first member with respect to the second member to a predetermined range when the guide portion is making contact with the sheet feeding cassette and/or the paper sheet stored in the sheet feeding cassette, and
• the first member changes the posture as a result of the guide portion making contact with the sheet feeding cassette, which is moved to switch between the mounted state and the pulled-out state, and/or the paper sheet stored in the sheet feeding cassette, so that the first member abuts the restriction portion, and the second member moves the first member in the up-and-down direction in a state where the first member abuts the restriction portion according to the movement of the sheet feeding cassette.