Abstract: A display system includes a touch display, and a control unit that displays content on the touch display so as to follow movement of an operator. When it is detected that the operator is moving in a first direction, the control unit moves the content to follow the movement of the operator so that a fourth region of the content is displayed, in a first case in which a third region of the content is being displayed, and the control unit moves the content to follow the movement of the operator so that a first region including a first end of the content and a second region including a second end of the content are displayed, in a second case in which the first region is being displayed. A follow amount in the first case differs from a follow amount in the second case.

Abstract: A chuck device in which a rotary sleeve provided to a main body is rotated, and by rotation of an annular rotary body which rotates together with the rotary sleeve, jaws screwed together with the rotary body are expanded, contracted, advanced, and retracted, and a tool is gripped by the jaws; the chuck device comprising a retaining engaging body for engaging with the rotary body and preventing the rotary sleeve from coming out of the rotary body; wherein the retaining engaging body is provided to be fixed to a proximal end side of the rotary sleeve; a rotation transmission part for directly or indirectly transmitting the rotation of the rotary sleeve to the rotary body is provided to the retaining engaging body; and the rotation of the rotary sleeve is transmitted to the rotary body via the retaining engaging body, and the rotary body rotates together with the rotary sleeve.

Abstract: To provide a tool holder that is capable of exerting a vibration-minimizing effect in a reliable manner using a simple configuration and that is extremely useful for practical application.

Abstract: To provide a tool holder that is capable of exerting a vibration-minimizing effect in a reliable manner using a simple configuration and that is extremely useful for practical application.

Abstract: To provide a practical chuck device which is not only capable of providing more reliable and stable retention between the rotary body or the main body and the rotary sleeve, but also has excellent mass-productivity.

Abstract: An installation apparatus configured to install a projector includes: a first supporting unit having a member to be placed on an object used for installation; a second supporting unit extending downward of the object from the first supporting unit and supporting the projector under the object; and a connecting portion having a plurality of connectors configured to connect the projector arranged therein.