| 摘要 |
There is provided a disc chucking device. A disc chucking device according to an aspect of the invention may include: a chuck housing having an opening communicating with a mounting space therein; a chuck member having one end portion exposed to an outside of the opening; and a spring member mounted within the mounting space in order to exert an elastic force to the chuck member, wherein a portion of an outer circumferential surface of the chuck housing, on which the chuck member is disposed, has a smaller outer diameter than other portions thereof.
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