Abstract: An assistive device structure for positioning and pressure relief is provided, including a first elastic layer and a second elastic layer, which are attached by using a high-frequency encapsulation process, sealing, bagging, thermoforming, or an integrally molding process. Each of the first and second elastic layers has a bottom surface and an arc surface disposed opposite to each other. The arc surface includes two protrusions and a recess formed there in between. The two protrusions have different heights. A hollow area is disposed in the recess of the first and second elastic layers. Based on such structure, the bottom surfaces of the first and second elastic layers are attached to form the proposed assistive device structure for a user to lean against and providing multiple positioning effects and pressure relief. More than four axial directions of supporting forces are generated to effectively enhance muscle relaxation and stress relief.

Abstract: A joint protector includes a band surrounding a human body and having an inner side and an outer side. A power supplier is securely attached to the outer side of the band. A flexible heating pad is attached to the inner side of the band and electrically connected to the power supplier. The flexible heating pad provides heat energy to warm the user's skin and reduce pain due to the electric resistance of the flexible heating pad. An inner layer is securely adhered on the inner side of the band for covering the flexible heating pad.