DRIVING APPARATUS THAT DRIVES DRIVEN BODY USING LEAD SCREW, AND IMAGE PICKUP APPARATUS EQUIPPED WITH THIS DRIVING APPARATUS
First Claim
1. A driving apparatus comprising:
- a driving source;
a lead screw that has a lead groove that is formed over at least a first member and a second member and has a first surface and a second surface that face to each other in a width direction, said lead screw being rotationally driven by said driving source;
a moving member that engages with the lead groove of said lead screw, and moves approximately parallel to said lead screw according to rotation of said lead screw;
a driven body that is displaced between a first position and a second position according to movement of said moving member; and
a first energization member that energizes said moving member to a side of the second surface at least when said moving member passes across a first junction that occurs at a boundary between the first member and the second member in a stroke where said moving member contacts with a drive surface of the first surface of the lead groove and moves in a direction from a first end to a second end of the lead groove.
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Accused Products
Abstract
A driving apparatus reduces degradation of driving performance and durability when a driven body is displaced using a lead screw. The lead screw has a lead groove that is formed over first and second members and has first and second surfaces that face to each other in a width direction. The lead screw is rotated by a driving source. A moving member engages with the lead groove, and moves parallel to the lead screw according to rotation of the lead screw. A driven body is displaced between first and second positions according to movement of the moving member. A first energization member energizes the moving member toward the second surface when the moving member passes across a first junction that occurs at a boundary between the first and second members in a stroke where the moving member contacts with a drive surface of the first surface to be moved.
8 Citations
17 Claims
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1. A driving apparatus comprising:
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a driving source; a lead screw that has a lead groove that is formed over at least a first member and a second member and has a first surface and a second surface that face to each other in a width direction, said lead screw being rotationally driven by said driving source; a moving member that engages with the lead groove of said lead screw, and moves approximately parallel to said lead screw according to rotation of said lead screw; a driven body that is displaced between a first position and a second position according to movement of said moving member; and a first energization member that energizes said moving member to a side of the second surface at least when said moving member passes across a first junction that occurs at a boundary between the first member and the second member in a stroke where said moving member contacts with a drive surface of the first surface of the lead groove and moves in a direction from a first end to a second end of the lead groove. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An image pickup apparatus comprising:
a driving apparatus comprising; a driving source; a lead screw that has a lead groove that is formed over at least a first member and a second member and has a first surface and a second surface that face to each other in a width direction, said lead screw being rotationally driven by said driving source; a moving member that engages with the lead groove of said lead screw, and moves approximately parallel to said lead screw according to rotation of said lead screw; a driven body that is displaced between a first position and a second position according to movement of said moving member; and a first energization member that energizes said moving member to a side of the second surface at least when said moving member passes across a first junction that occurs at a boundary between the first member and the second member in a stroke where said moving member contacts with a drive surface of the first surface of the lead groove and moves in a direction from a first end to a second end of the lead groove.
Specification