A fastening element comprises a housing having a top side and a bottom side and partially defines a recess extending along a longitudinal axis and adapted to receive the shaft of a stud, and a slit extending radially from the recess. The fastening element further comprising a spring ring seated in the slit and protruding radially into the recess. The sprig ring is seated rotatable in the slit, so that a rotational motion of the spring ring within the housing is allowed. The spring ring comprises a body and spring fingers, wherein the body is an annular body partially defining a hole, and wherein the spring fingers protrude radially into the hole.

A wearable device includes a device main body and a connection structure. The device main body includes a snap portion configured to snap with the connection structure. The connection structure includes a main body, a fastening assembly, and a pressing member. The main body defines a fastening groove. The fastening assembly is rotationally mounted within the fastening groove. The fastening assembly includes a first end portion and a second end portion. The fastening assembly includes a latching portion protruding from the first end portion. The latching portion is configured to snap with the snap portion. The pressing member is arranged on the second end portion of the fastening assembly. When the second end portion is pressed, the first end portion is rotated away from the snap portion to disengage the latching portion from the snap portion.

A wearable device includes a device main body and a connection structure. The device main body includes a snap portion configured to snap with the connection structure. The connection structure includes a main body, a fastening assembly, and a pressing member. The main body defines a fastening groove. The fastening assembly is rotationally mounted within the fastening groove. The fastening assembly includes a first end portion and a second end portion. The fastening assembly includes a latching portion protruding from the first end portion. The latching portion is configured to snap with the snap portion. The pressing member is arranged on the second end portion of the fastening assembly. When the second end portion is pressed, the first end portion is rotated away from the snap portion to disengage the latching portion from the snap portion.

The present invention discloses a mobile phone buckling structure and a mobile phone fixing device. The mobile phone buckling structure comprises a first housing, a transmission part and a button. A cavity is formed inside the first housing; a first guide slot and a second guide slot are formed in the cavity; a first movable buckle is movably arranged in the first guide slot; a second movable buckle is movably arranged in the second guide slot; a first elastic element is arranged between the bottom ends of the first movable buckle and first guide slot; a second elastic element is arranged between the bottom ends of the second movable buckle and second guide slot; a first slot matched with one end of the first movable buckle is formed at the first side of the transmission part; a second slot matched with one end of the second movable buckle is formed at the second side of the transmission part; a third elastic element is arranged between the third side of the transmission part and the inner wall of the cavity; the fourth side of the transmission part is connected with a button movably arranged in a through hole of the first housing. The present invention can quickly realize the fixing and separation of the mobile phone, and can also be operated by one hand.

A device for adjusting the fit of a garment may include a monorail track with a plurality of rail teeth spaced along a length thereof; a rail carriage slidably engaged with the monorail track; and a button operatively attached to the rail carriage, wherein at least one of the rail carriage and the button includes a locking device to removably engage with the plurality of track teeth. The locking device may be a trigger post with a button tooth, an engagement pin, a pinch clamp, a leaf spring, or the like. Size adjustment of a garment may be accomplished by sliding the button to a desired position of the monorail track and locking the button into place with the locking device.

A pressing portion is housed movably in a front-and-back direction inside a main member portion. In the main member portion, two main-member-portion holes through which a string member passes are formed on a side wall forming an opening portion. The pressing portion includes a pressing face on a front face, and internally provides a pressing-portion string insertion portion which can communicate with the two main-member-portion holes and through which the string member passes. A bend insertion portion for inserting the string member to pass through by bending the string member inside the pressing portion is provided. An urging device for urging the pressing portion is provided at a position wrapping a virtual three-dimensional shape obtained by connecting, with straight lines, two imaginary faces on which an inner face of the side wall and an outer shape of the string member passing through the two main-member-portion holes intersect.

Provided is a button fastener-side die. The button fastener comprises an annular base defining an opening and a plurality of legs. The button fastener-side die includes a holding part for holding the button fastener and a correcting member for passing through the opening of the button fastener held by the holding part, a pushing member for pushing the correcting member to move in a passing direction toward passing through the opening of the button fastener, and a first spring disposed between the correcting member and the pushing member. When at least one of the legs of the button fastener is in an abnormal position, the correcting member corrects the abnormal leg(s) to be in the normal position as the correcting member is passing through the opening.

A female button is in an unlocked state when a rotator takes a first position and is in a locked state when the rotator takes a second position, insertion and removal of a post of a male button being allowed in the unlocked state, and insertion and removal of the post of the male button being hindered in the locked state. Arresting part or elastic member is provided with a projection which, when the rotator rotates toward the second position, displaces the arresting part toward the rotational axis before the rotator reaches the second position and, if the displacement of the arresting part toward the rotational axis is obstructed by the post, rotational resistance of the rotator is increased.

Provided is a button fastener-side die. The button fastener comprises an annular base defining an opening and a plurality of legs. The button fastener-side die includes a holding part for holding the button fastener and a correcting member for passing through the opening of the button fastener held by the holding part, a pushing member for pushing the correcting member to move in a passing direction toward passing through the opening of the button fastener, and a first spring disposed between the correcting member and the pushing member. When at least one of the legs of the button fastener is in an abnormal position, the correcting member corrects the abnormal leg(s) to be in the normal position as the correcting member is passing through the opening.

A clasp which has a primary body and a secondary body couples an elongated member. A bore has a groove within the primary body. A rod has a leg coupled to the secondary body and slidably engages the groove. A shaped locking channel is coupled to the groove. The leg engages with the shaped locking channel for coupling and decoupling the primary body with the secondary body.