A self-locking mechanism includes: a housing having a through hole and a dodge hole; an elastic member in the dodge hole, the elastic member being connected to a wall of the dodge hole and having a free end capable of swinging in a thickness direction of the housing; a first engaging member on the elastic member; a knob on an outer side of the housing and having one end passing through the through hole; a plurality of second engaging members on a side of the knob adjacent to the housing; wherein the first engaging member may be engaged with or disengaged from one of the second engaging members under an action of an elastic deformation of the elastic member as the knob rotates; and a driven member on an inner side of the housing and fixedly connected with the knob so as to be rotated under driving of the knob.

A self-locking mechanism includes: a housing having a through hole and a dodge hole; an elastic member in the dodge hole, the elastic member being connected to a wall of the dodge hole and having a free end capable of swinging in a thickness direction of the housing; a first engaging member on the elastic member; a knob on an outer side of the housing and having one end passing through the through hole; a plurality of second engaging members on a side of the knob adjacent to the housing; wherein the first engaging member may be engaged with or disengaged from one of the second engaging members under an action of an elastic deformation of the elastic member as the knob rotates; and a driven member on an inner side of the housing and fixedly connected with the knob so as to be rotated under driving of the knob.

A self-locking apparatus for a gear set permits forward-driving an input in clockwise or counterclockwise directions and substantially prevents an output from being driven in either or both of those directions. The device includes a gear set with planet gears arranged within a planet carrier within a fixed ring gear. Each of the planet gears is engaged with the planet carrier via a differentiating connector retained in an elongated slot in the planet carrier where it moves to the clockwise position when being forward driven in the clockwise direction and, when the planet carrier is back driven in the clockwise direction, the connector moves to the counter-clockwise position in the slot. This arrangement allows the gear set to be forward driven but not back driven. This differentiated action can engage/disengage with any form of unidirectional engage/disengage mechanism. The apparatus is useful in industrial applications requiring self-locking gear sets.

A rotary device includes a rotatable member, at least one movable ring, and a supporting member. The supporting member includes a stopping portion. The rotatable member includes a rotary ring and a positioning portion. The movable ring includes an acting portion. The rotary ring and the at least one movable ring are coaxially disposed on the supporting member, and the movable ring is disposed between the rotatable member and the supporting member. The rotary ring and the at least one movable ring is capable of rotating relative to the supporting member. A part of the positioning portion overlaps the movable ring. When the rotary ring rotates relative to the supporting member, the part of the positioning portion pushes the acting portion, to drive the at least one movable ring to rotate until the acting portion is stopped between the positioning portion and the stopping portion.

A rotary device includes a rotatable member, at least one movable ring, and a supporting member. The supporting member includes a stopping portion. The rotatable member includes a rotary ring and a positioning portion. The movable ring includes an acting portion. The rotary ring and the at least one movable ring are coaxially disposed on the supporting member, and the movable ring is disposed between the rotatable member and the supporting member. The rotary ring and the at least one movable ring is capable of rotating relative to the supporting member. A part of the positioning portion overlaps the movable ring. When the rotary ring rotates relative to the supporting member, the part of the positioning portion pushes the acting portion, to drive the at least one movable ring to rotate until the acting portion is stopped between the positioning portion and the stopping portion.

Various embodiments include an actuator comprising: a drive element; a transmission section; an actuating element; a mechanically active connection from the drive element to the actuating element through the transmission section; and a reset spring providing a closing force acting on the actuating element. The transmission section includes a drive gear wheel, a transmission gear wheel, and a take-off gear wheel. The transmission gear wheel includes a drive gear section and a take-off gear section. There is a first meshed engagement from the drive gear section through a first transmission function into the drive gear wheel and a second meshed engagement from the take-off gear section through a second transmission function into the take-off gear wheel. The first transmission function and the second transmission function are different. The drive gear wheel, the drive gear section, the take-off gear section, and the take-off gear wheel are arranged in one active plane.

A gear arrangement comprising: a housing having a gear axis and a housing stop, the housing stop having a first abutment and an second abutment spaced apart from one another about the gear axis; a rotatable member mounted on the gear axis, the rotatable member having a first member side having a first member stop and a second member side having a second member stop, the first member side opposite the second member side, such that the first member stop is positioned between the first abutment and the second abutment; and a gear mounted on the gear axis, the gear having a first gear side, and a second gear side having a gear stop, the first gear side opposite the second gear side, such that the gear stop is engageable and disengageable with the second member stop during rotation of the gear about the gear axis, the rotatable member positioned between the housing and the gear; wherein said rotation of the gear is hindered while the gear stop and the second member stop are engaged when the first member stop enters into engagement with either the first abutment or the second abutment.

A gear arrangement comprising: a housing having a gear axis and a housing stop, the housing stop having a first abutment and an second abutment spaced apart from one another about the gear axis; a rotatable member mounted on the gear axis, the rotatable member having a first member side having a first member stop and a second member side having a second member stop, the first member side opposite the second member side, such that the first member stop is positioned between the first abutment and the second abutment; and a gear mounted on the gear axis, the gear having a first gear side, and a second gear side having a gear stop, the first gear side opposite the second gear side, such that the gear stop is engageable and disengageable with the second member stop during rotation of the gear about the gear axis, the rotatable member positioned between the housing and the gear; wherein said rotation of the gear is hindered while the gear stop and the second member stop are engaged when the first member stop enters into engagement with either the first abutment or the second abutment.

A locking mechanism to prevent back-drive includes a locking shaft with guide grooves. Locking shaft guides engage the guide grooves to constrain lateral motion of the locking shaft. A nut includes corresponding grooves to the locking shaft, and engages the locking shaft to prevent linear translation. The locking mechanism may be incorporated into a aircraft seat armrest to create a positive lock in the armrest position.

An actuator (1) having two detent devices (2) which include in each case at least one terminal detent element (3) for a part (27) of a drive train, and at least one adjustment element (4, 19) which is operatively connected to the terminal detent element (3) and is specified for setting a position of the terminal detent element (3). The at least one gear unit (5, 18) is disposed between the at least one terminal detent element (3) and the at least one adjustment element (4, 19).