DRIVING MECHANISM
A driving mechanism is provided. The driving mechanism includes a fixed assembly, a movable member, and a driving assembly. The movable member is movable relative to the fixed assembly. The driving assembly is configured to drive the movable member to move relative to the fixed assembly. The driving assembly includes a driving body and a driving portion. The driving portion receives external control signals and then deforms to push the driving body to deform, thereby driving a contact member located on the movable portion to move in a first dimension or a second dimension.
1 . A driving mechanism, comprising:
a fixed assembly;
a movable member, movable relative to the fixed assembly; and
a driving assembly, configured to drive the movable member to move relative to the fixed assembly.
2 . The driving mechanism as claimed in claim 1 , wherein
the driving assembly includes a driving body and a contact member;
the driving body has a flexible structure;
the driving body includes a fixed portion and a movable portion;
the movable portion is movable relative to the fixed portion;
the contact member is disposed on the movable portion;
the contact member has a contact portion, configured to contact and apply a driving force to the movable member;
the driving assembly further includes a driving portion configured to drive the movable portion and the contact member to move relative to the fixed portion; and
the movable portion and the driving portion are arranged along a first axis.
3 . The driving mechanism as claimed in claim 2 , wherein
the driving body further includes a first flexible portion and a first connecting portion;
the movable portion is movably connected to the fixed portion via the first flexible portion;
the first connecting portion is connected to the driving portion, and the first connecting portion has a first connecting surface which faces the driving portion; and
the driving portion has a first surface which faces the first connecting portion and is connected to the first connecting surface.
4 . The driving mechanism as claimed in claim 3 , wherein
the driving body further includes a second connecting portion which is connected to the driving portion, and the second connecting portion has a second connecting surface which faces the driving portion;
the driving portion has a second surface which faces the second connecting portion and is connected to the second connecting surface; and
the first connecting surface is perpendicular to the first axis.
5 . The driving mechanism as claimed in claim 4 , wherein
the first flexible portion has a first flexible portion surface which is perpendicular to a second axis;
when viewed along the second axis, the first flexible portion does not overlap the driving portion; and
the first axis and the second axis are perpendicular to each other;
the first flexible portion and the driving portion are arranged along a third axis; and
the third axis, the first axis and the second axis are perpendicular to each other.
6 . The driving mechanism as claimed in claim 5 , wherein
the first flexible portion further has a second flexible portion surface;
the first flexible portion surface and the second flexible portion surface face opposite directions;
the first flexible portion further has a first notch and a second notch;
the first notch is formed on the first flexible portion surface; and
the second notch is formed on the second flexible portion surface.
7 . The driving mechanism as claimed in claim 6 , wherein
when viewed along the second axis, the first notch overlaps at least a portion of the second notch; and
a depth of the first notch is different from a depth of the second notch;
the first flexible portion further has a third flexible portion surface and a fourth flexible portion surface;
the third flexible portion surface is perpendicular to the first flexible portion surface; and
the fourth flexible portion surface and the third flexible portion surface face opposite directions.
8 . The driving mechanism as claimed in claim 7 , wherein
the first flexible portion further has a third notch and a fourth notch;
the third notch is formed on the third flexible portion surface; and
the fourth notch is formed on the fourth flexible portion surface;
when viewed along the third axis, the third notch overlaps at least a portion of the fourth notch; and
a depth of the third notch is different from a depth of the fourth notch.
9 . The driving mechanism as claimed in claim 8 , wherein
the driving portion is configured to drive the movable portion to move in a first dimension, and movement in the first dimension at least includes movement along the second axis;
when the driving portion drives the movable portion to move, a movement trajectory of the contact portion is an arc trajectory;
the arc trajectory has a closed structure; and
the arc trajectory has a center.
10 . The driving mechanism as claimed in claim 9 , wherein
the arc trajectory defines a central axis which passes through the center;
the central axis is parallel to the third axis;
the central axis is perpendicular to the second axis; and
when viewed along the first axis or the third axis, the central axis does not pass through a center of the driving portion.
11 . The driving mechanism as claimed in claim 10 , wherein
the driving mechanism further includes a positioning assembly configured to be affixed to the driving assembly;
the positioning assembly includes a positioning member and an elastic member;
the positioning member has a long strip-shaped structure; and
the positioning member passes through a portion of the fixed assembly and the fixed portion of the driving assembly.
12 . The driving mechanism as claimed in claim 11 , wherein
the elastic member sheathes the positioning member;
the elastic member is disposed between the driving assembly and the fixed assembly;
the elastic member is configured to apply a stabilizing force onto the driving assembly;
a direction of the stabilizing force is not perpendicular to a direction of the driving force; and
the direction of the stabilizing force is not parallel to the first flexible portion surface.
13 . The driving mechanism as claimed in claim 12 , wherein
the fixed assembly includes an outer casing and a base;
the outer casing is fixedly connected to the base along the second axis; and
when viewed along the first axis, the outer casing and the base surround the driving assembly.
14 . The driving mechanism as claimed in claim 13 , wherein
the outer casing of the fixed assembly has an avoiding portion corresponding to the second flexible portion surface;
the avoiding portion has an avoiding portion surface which faces the second flexible portion surface;
the driving mechanism further includes a limiting element;
the limiting element is disposed on the fixed assembly and has a limiting surface which faces the driving assembly;
the limiting surface is parallel to the second axis and perpendicular to the first axis; and
the limiting surface is in direct contact with a fixed surface of the driving assembly.
15 . The driving mechanism as claimed in claim 14 , wherein
the positioning member has a first threaded structure;
the driving body of the driving assembly has a second threaded structure corresponding to the first threaded structure;
the first threaded structure is configured to be screwed to the second threaded structure so that the fixed portion of the driving body is located in a fixed position;
when viewed along the third axis, the positioning member extends along a first extension direction;
when viewed along the third axis, the driving body extends along a second extension direction; and
the first extension direction is not perpendicular to the second extension direction.
16 . The driving mechanism as claimed in claim 14 , wherein
the positioning member has a limit portion configured to limit the driving assembly to a fixed position;
when the driving assembly is located in the fixed position, the driving assembly contacts the limit portion;
the limit portion has a limit surface which faces the driving assembly;
when viewed along a direction perpendicular to the second axis, at least a portion of the driving assembly is located between the limit portion and the elastic member; and
the avoiding portion surface of the avoiding portion is not perpendicular or parallel to the first flexible portion surface.
17 . The driving mechanism as claimed in claim 16 , wherein
the driving assembly has a first opening, and at least a portion of the positioning member is located in the first opening;
the positioning member defines a first extension direction;
the positioning member extends along the first extension direction;
when viewed in the first extension direction, an area of the first opening is greater than an area of the first cross section of the positioning member; and
the first extension direction is perpendicular to the first cross section.
18 . The driving mechanism as claimed in claim 17 , wherein
the area of the first opening is at least 5% greater than the area of the first cross section;
when viewed in the first extension direction, the first opening has a long strip-shaped structure, and the first opening defines a stretch direction; and
when viewed in the first extension direction, a connecting line of a center of the positioning member and a center of the contact member is parallel to the stretch direction.
19 . The driving mechanism as claimed in claim 10 , wherein
when the driving assembly receives a first control signal, the driving assembly drives the contact member to move in the first dimension;
when the driving assembly receives a second control signal, the driving assembly drives the contact member to move in a second dimension;
the second dimension is opposite to the first dimension;
the first control signal and the second control signal have periodic characteristics; and
a frequency of the first control signal is the same as a frequency of the second control signal.
20 . The driving mechanism as claimed in claim 10 , wherein
when the driving assembly receives a first control signal, the driving assembly drives the contact member to move in the first dimension;
when the driving assembly receives a second control signal, the driving assembly drives the contact member to move in a second dimension;
the second dimension is opposite to the first dimension;
the first control signal and the second control signal have periodic characteristics; and
a frequency of the first control signal is different from a frequency of the second control signal.