In an embodiment a wrist-worn electronic device includes a main body, a wrist strap connected to the main body, wherein the wrist strap is configured to place the main body on a wrist of a target user, a wrist size determining part configured to measure, by using the wrist strap of the wrist-worn electronic device, a use circumference of the wrist-worn electronic device that matches a wrist size of the target user, and determine the wrist size of the target user based on the use circumference of the wrist-worn electronic device, and a blood pressure determining part configured to detect a pulse wave signal of the target user, measure a measured blood pressure of the target user based on the pulse wave signal, and correct the measured blood pressure of the target user based on the wrist size of the target user thereby obtaining a first corrected blood pressure of the target user.

In an embodiment a wrist-worn electronic device includes a main body, a wrist strap connected to the main body, wherein the wrist strap is configured to place the main body on a wrist of a target user, a wrist size determining part configured to measure, by using the wrist strap of the wrist-worn electronic device, a use circumference of the wrist-worn electronic device that matches a wrist size of the target user, and determine the wrist size of the target user based on the use circumference of the wrist-worn electronic device, and a blood pressure determining part configured to detect a pulse wave signal of the target user, measure a measured blood pressure of the target user based on the pulse wave signal, and correct the measured blood pressure of the target user based on the wrist size of the target user thereby obtaining a first corrected blood pressure of the target user.

Attachment systems for attaching a wearable electronic device to a user including a sizing band and a retaining band are disclosed. The sizing band includes at least one sizing eyelet and a band-insertable end. The retaining band includes at least a post for insertion into the sizing eyelet of the sizing band and a concealment aperture configured to receive the band-insertable end of the sizing band. On a bottom surface of the retaining band can be a recessed guide bed configured to guide the band-insertable end along the bottom surface of the retaining band. A wearable electronic device can couple to both the sizing band and the retaining band by accepting an end portion of each band into receiving channels extending into opposite sidewalls of the housing.

A wristband can comfortably secure an electronic device, such as a wristwatch or fitness/health tracking device, to a wrist of a user. The wristband can include a number of magnets that allow the wristband to be magnetically coupled to itself when folded over or when separate band portions are overlapping. The magnets can include a polymer mixed with a magnetic material to provide magnetic properties and flexibility. The magnets can be joined together by a continuous support structure that extends through opposing pairs of the magnets. The support structure can provide substantial and ability as well as tensile strength. The magnets and the support structure can be surrounded by a flexible cover to protect the components within.

A metallic mesh material used to form a portion of a band or securing strap for a wearable electronic device. The band may include a magnetic tab for securing a wearable device to the wrist of a user. The tab may include one or magnetic elements that are configured to engage a surface of the mesh to secure the wearable device to the wrist of a user.

A metallic mesh material used to form a portion of a band or securing strap for a wearable electronic device. The band may include a magnetic tab for securing a wearable device to the wrist of a user. The tab may include one or magnetic elements that are configured to engage a surface of the mesh to secure the wearable device to the wrist of a user.

The present invention utilizes a female coupler and male coupler to connect jewelry. The male coupler, featuring a stop, a shaft, and a buffer slides into a first channel within the shoot portion of a female coupler. The stop is rotated into position within a second channel of the scoop portion of the female coupler. The scoop portion secures the male coupler within the female coupler until a user forcibly rotates the stop to remove it from the scoop portion. The present invention only requires grasping of each of coupler and does not require squeezing any components.

A watch can include a watch band having a first strap segment, a second strap segment, a nest portion secured between the first strap segment and the second strap segment, and an opening extending through the nest portion. The watch can further include a housing releasably mountable to the nest portion, and a sensor disposed within the housing and configured to align with the opening when the housing is mounted to the nest portion.

A system for alerting a victim of a presence of an offender, the system includes a first bracelet configured to be worn by the victim, the first bracelet including a first GPS receiver, a first wireless network transceiver, a speaker or a vibration motor, and a display element, wherein the first wireless network transceiver comprises a wireless cellular network transceiver or a WiFi transceiver. The system also includes a second bracelet configured to be worn by the offender. A cloud-based monitor system including a computing device and a memory configured to receive data from the first bracelet and the second bracelet and perform appropriate actions as necessary. Each bracelet may include a mechanical lock having at least a first fastener, a second fastener, and/or a third fastener, to provide, respectively, one, two or three levels of security for the device.

The present disclosure describes a multi-configuration jewelry piece. The multi-configuration jewelry piece has a band with a first end and a second end, a first housing, and a second housing. The first housing couples to the first end. The second housing couples to the second end. Each of the first housing and the second housing define a cavity. The cavity houses a first magnet and a second magnet. The first magnets and the second magnets are configured to join the first housing to the second housing. Each of the first magnet and the second magnet has a north pole and a south pole. The north pole of the first magnet and the south pole of the second magnet face a first direction. The south pole of the first magnet and the north pole of the second magnet face a second direction opposite the first direction.