| 摘要 |
A housing 10 of a development apparatus is vertically divided into two segments; a lower housing 20 and an upper housing 30. The housings 20, 30 are fixedly joined together without use of fixing means such as screwing or welding means but by means of causing a plurality of engaging projection pieces 26 formed on a joining surface section 25 to engage with engage holes 36 formed on a joining surface section 35, and causing resiliently-deformable snap-fit engaging sections 27 to engage with engaged sections 37. Side brackets 40, 50 are fitted to respective sides of the thus-joined housings 20, 30, thereby reinforcing the joined state of the housings 20, 30. No damage arises at the time of assembly or disassembly of the housing, and the housing can be reused.
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