A fastening device with protection sheath for portable electronic device is provided, including an elastic protection sheath, a connecting accessory and a strap; the elastic protection sheath being stretchable to increase size for accommodating and fixing a portable electronic device, the connecting accessory being disposed on the elastic protection sheath and located on the second surface, the connecting accessory being disposed with a rotatable arc-shaped bracket with a protruding hook and a positioning element disposed respectively at the two ends of the arc; the strap being elastic and stretchable, and having a limiting hole and a plurality of buckle holes, the strap being sheathed on the position element by the limiting hole and the protruding hook being inserted into one of the buckle holes, the bracket and the strap being used to wrap and tighten around a carrier to be fastened to.

The present disclosure relates to a smart belt including: a belt body; a belt buckle provided on the belt body; a GPS positioning mechanism for generating a traveling direction; and a rotatable direction indication mechanism for indicating the traveling direction; a drive mechanism for driving the direction indication mechanism to rotate to indicate the traveling direction according to the traveling direction given by the GPS positioning mechanism; and a light source used to project the traveling direction indicated by the direction indication mechanism onto the road surface. The beneficial effects of the present disclosure are: users' hands can be freed and the portability and convenience of navigation usage can be improved.

A length adjuster on a wearable device includes an arc-shaped shell and a length fine-adjustment mechanism. A first connection rack, a second connection rack, a gear, a button and a return spring of a gear shaft are provided in the arc-shaped shell. The first connection rack, the second connection rack and the gear are meshed with one another. The gear shaft is connected to a clockwork spring mechanism. The gear shaft and the length fine-adjustment mechanism are in a clutch connection. A unidirectional rotation-prevention structure is provided in the length fine-adjustment mechanism, and the unidirectional rotation-prevention structure allows the length fine-adjustment mechanism to drive the gear shaft to rotate in a rotation direction for enabling a clockwork spring to be stretched, and prevents the gear shaft from rotating in the direction opposite to the rotation direction. The length adjuster is provided with a release mechanism.

A safety cinch for use with a saddle. The safety cinch includes a first layer of material and a securing device connectable to a saddle connector. The safety cinch also includes a latch apparatus that can selectively engage the securing device and a wireless receiver that can send a signal to the latch apparatus to disengage from the securing device to unsecure a saddle from an animal. A method of dislodging a saddle from a horse via a remote control via the step of actuating the remote control to activate the safety cinch.

A safety cinch for use with a saddle. The safety cinch includes a first layer of material and a securing device connectable to a saddle connector. The safety cinch also includes a latch apparatus that can selectively engage the securing device and a wireless receiver that can send a signal to the latch apparatus to disengage from the securing device to unsecure a saddle from an animal. A method of dislodging a saddle from a horse via a remote control via the step of actuating the remote control to activate the safety cinch.

The invention herein relates to a buckle assembly with one or more insertable and/or attachable pieces that are suitable for the sharpening of various tools, such as knives. The buckle assembly may have a first sharpening insert that is composed primarily of tungsten carbide. The first sharpening insert may be affixed to the top of the buckle assembly. Alternatively, the first sharpening insert may be removably attached to the buckle assembly through various methods. The sharpening insert may be used to sharpen the edge of a tool. The buckle assembly is also composed of a front face that may have a second fine sharpening face. The fine sharpening face may be composed of a diamond grit plate. The fine sharpening face may be removably attached to the buckle assembly in a similar fashion to the sharpening insert. Alternatively, the fine sharpening face may be coated with sharpening material, such as a diamond grit coating, so as to not be removable from the buckle assembly as a whole. The buckle assembly also has a back face. The back face may also have a fine sharpening face in addition to or in alternative to the front face being a fine sharpening face.

A belt buckle and knife assembly for converting a belt buckle into a self defense weapon includes a buckle that has a first portion is hingedly coupled to a second portion. The buckle is positionable in a folded position or an unfolded position. A belt is removably attachable to extend between each of the first portion and the second portion of the buckle for wearing around the user's waist. A knife is pivotally integrated into the buckle and the knife is positionable between a stored position and a deployed position. A catch is movably integrated into the second portion of the buckle and the catch retains the knife in either the stored position of the deployed position.

In various example embodiments, devices, systems, and methods for a waist measuring belt are provided. An example waist measuring belt is made up of a belt buckle frame with attachments for a belt strap. The belt further includes a position measuring module coupled to the belt buckle frame that measures an attachment position of a second end of the belt strap to the belt buckle frame. The belt also includes a tension measuring module coupled to the belt buckle frame that measures a tension through the belt buckle frame and the belt strap. A memory and a wireless communication module attached to the belt may be used to store measurements and communicate with a mobile device or server. In various embodiments, estimated user waist sizes over time using measured values and belt-specific data may be used to estimate a user's waist size and generate a waist size history.

In various example embodiments, devices, systems, and methods for a waist measuring belt are provided. An example waist measuring belt is made up of a belt buckle frame with attachments for a belt strap. The belt further includes a position measuring module coupled to the belt buckle frame that measures an attachment position of a second end of the belt strap to the belt buckle frame. The belt also includes a tension measuring module coupled to the belt buckle frame that measures a tension through the belt buckle frame and the belt strap. A memory and a wireless communication module attached to the belt may be used to store measurements and communicate with a mobile device or server. In various embodiments, estimated user waist sizes over time using measured values and belt-specific data may be used to estimate a user's waist size and generate a waist size history.

Various embodiments of the present invention are generally directed to a buckle assembly for sharpening a cutting tool. A quick release buckle assembly is provided including: a male buckle component having a pair of resiliently flexible legs and a sharpener receiver disposed between the pair of resiliently flexible legs; a female buckle component having a socket portion configured to receive the pair of resiliently flexible legs and the sharpener receiver disposed between the pair of resiliently flexible legs; and a first sharpening rod having a first sharpening edge and a second sharpening rod having a second sharpening edge.