Prosthetic foot device

Abstract

A prosthetic foot device includes a foot unit, an ankle pivot unit, an upper ankle unit, and an adjustment unit. The foot unit defines a reference surface at its bottom. The foot unit includes a lower ankle body. The lower ankle body has multiple upward-opening grooves of varying depths. The ankle pivot unit passes through the top of the lower ankle body and the bottom of the upper ankle unit. The adjustment unit includes an adjustment member abutting against the bottom of the upper ankle unit. The adjustment unit can be operated to switch the adjustment member between the multiple grooves, so that the upper ankle unit is rotated relative to the lower ankle body to corresponding multiple displacement states by the adjustment members located in different grooves. This allows the tilt of the upper ankle unit relative to the reference surface to be changed without external tools, thereby improving both ease of use and comfort.

Claims

1. A prosthetic foot device, comprising: a foot unit having a base defining a reference surface, the foot unit including a lower ankle body having a plurality of upward-facing grooves of different depths; an ankle pivot unit extending laterally through the top of the lower ankle body; an upper ankle unit having a base through which the ankle pivot unit passes and being rotatable about the ankle pivot unit relative to the lower ankle body; and an adjustment unit including an adjustment member abutting against the bottom of the upper ankle unit, the adjustment unit being operable to switch the adjustment member between the plurality of grooves, so that the upper ankle unit is abutted by the adjustment member located in different grooves and rotates relative to the lower ankle body to corresponding plurality of displacement states, thereby changing the degree of inclination of the upper ankle unit relative to the reference surface.

2. The prosthetic foot device as claimed in claim 1, wherein, There are two grooves, one of which is defined as a shallow groove and the other as a deep groove. The shallow groove and the deep groove are formed side by side on the top surface of the lower ankle body and located in front of the ankle pivot unit. The depth of the deep groove is greater than that of the shallow groove. When the adjusting member is inserted into the shallow groove, the upper ankle unit is in a first displacement state. When the adjusting member is inserted into the deep groove, the upper ankle unit is in a second displacement state. Compared with the second displacement state, the upper ankle unit is tilted backward by a larger angle when it is in the first displacement state due to the pressure from the adjusting member.

3. The prosthetic foot device as claimed in claim 1, wherein, The adjustment member has a main body extending forward and backward, and a protrusion protruding downward from the bottom surface of the main body. The top surface of the main body abuts against the bottom of the upper ankle unit. The protrusion can be switched into one of the plurality of grooves. When the protrusion is inserted into one of the grooves, the top surface of the main body generates a support height corresponding to the groove, so that the upper ankle unit rotates to one of the plurality of displacement states.

4. The prosthetic foot device as claimed in claim 1, wherein, The adjustment unit also includes a linkage pivot that extends vertically and is pivotally disposed within the upper ankle unit and connected to the adjustment member, and a lever that extends radially outward from the linkage pivot and protrudes outside the upper ankle unit. The lever can be operated to swing and drive the adjustment member to rotate around the linkage pivot, so that the end of the adjustment member away from the linkage pivot is switched between the plurality of grooves.

5. The prosthetic foot device as claimed in claim 4, wherein, The upper ankle unit includes an upper ankle housing that internally defines an internal space and through which the ankle pivot unit passes, and a pivot seat that spans the internal space of the upper ankle housing and through which the linkage pivot can pivotally pass, the pivot seat being located between the lever and the adjusting member.

6. The prosthetic foot device as claimed in claim 1 further includes a hydraulic unit, wherein, The two ends of the hydraulic unit are respectively pivotally connected to the foot unit and the side of the upper ankle unit away from the ankle pivot unit. When the upper ankle unit rotates relative to the lower ankle body, the hydraulic unit is actuated to provide a damping force to slow down the rotation speed of the upper ankle unit relative to the lower ankle body.

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