Automated hand
The invention relates to an automated hand, such as a prosthetic hand. In one form, the automated hand may be fluid compatible. In one form, the automated hand may comprise features to reduce the risk of harm to motors and/or other sensitive components of the hand when subject to an impact. In one form, the hand may comprise a wrist joint configured to allow the hand to curl and flex and/or to rotate. In one form, one or more digits of the hand may be individually controlled. In one form the hand may include a thumb rotation locking mechanism. In one form the hand may be provided with removable grip plates. In one form, the hand may be configured for use as a training hand.
1. An automated prosthetic hand comprising:
a. a support frame;
b. a plurality of articulated members, each articulated member having a first end pivotally connected to the support frame via a respective articulated joint to allow lateral pivoting of the articulated member with respect to the support frame;
c. a plurality of prosthetic fingers, each finger being pivotally connected to a second end of a respective one of the articulated members via an articulated joint to allow vertical pivoting of the finger with respect to the respective articulated member; and
d. a bracket formed from a single piece of resilient material, the bracket having a base and a plurality of stabilisers extending from the base, the plurality of stabilisers configured to stabilise the plurality of articulated members;
wherein the stabilisers are configured to allow lateral rotation of the articulated members away from respective neutral positions when lateral forces are applied to the fingers and return the articulated members to the neutral positions after the forces are removed.
2. The automated prosthetic hand of claim 1 configured such that each finger can pivot upwards from its neutral position and downwards from its neutral position.
3. The automated prosthetic hand of claim 1 wherein the plurality of fingers is four fingers and the stabilisers are configured to stabilise the articulated members to which the four fingers are pivotally connected.
4. The automated prosthetic hand of claim 1 further comprising a stretchy cover.
5. The automated prosthetic hand of claim 1 wherein the bracket is moulded.
6. An automated prosthetic hand comprising:
a palm;
a plurality of prosthetic fingers;
a plurality of connectors connecting respective ones of the fingers to the palm, each connector comprising an articulated knuckle joint from which the respective finger extends; and
a resilient brace extending across a region containing the knuckle joints and including a plurality of portions located in a respective plurality of regions between adjacent connectors, the brace configured to deform to allow the connectors to splay from a neutral arrangement and resile to return the connectors substantially to the neutral arrangement;
wherein the resilient brace is formed from a polymer material; and
wherein each portion of the resilient brace that is located in a respective region between adjacent connectors is configured to:
deform to allow splay of two adjacent connectors that the respective region is between; and
resile to return the two adjacent connectors that the respective region is between substantially to the neutral arrangement.
7. The automated prosthetic hand of claim 6 wherein the resilient brace is formed of a material having a DMTA damping factor of between 0.05 to 0.8 over a temperature range of −20° C. to 100° C.
8. The automated prosthetic hand of claim 6 wherein the resilient brace is formed of a material having a resilience of between 20% and 60%.
9. The automated prosthetic hand of claim 6 wherein the resilient brace is formed of a material having a Shore A hardness of between 10 and 90.
10. The automated prosthetic hand of claim 6 wherein the resilient brace has such resilience that at least two digits may be splayed apart by at least 5 degrees.
11. The automated prosthetic hand of claim 6 wherein a lateral force of between 2.5 and 20 newtons applied to the tip of a digit results in angular rotation with respect to the palm in the plane of the palm of at least 3 degrees due to elastic deformation of the resilient brace.
12. The automated prosthetic hand of claim 11 wherein the angular rotation is at least 5 degrees.
13. The automated prosthetic hand of claim 6 wherein the resilient brace comprises an elastomer.
14. The automated prosthetic hand of claim 6 wherein the resilient brace comprises rubber.
15. The automated prosthetic hand of claim 6 wherein the resilient brace comprises silicone.
16. The automated prosthetic hand of claim 6 wherein the resilient brace includes areas that align with gaps between the fingers.
17. The automated prosthetic hand of claim 16 wherein the portions of the resilient brace that are in the regions between adjacent connectors align with gaps between four fingers.
18. The automated prosthetic hand of claim 6 wherein the resilient brace is formed from a single piece of polymer material.
19. The automated prosthetic hand of claim 6 wherein the resilient brace is positioned between knuckle joints and a body of the palm.
20. The automated prosthetic hand of claim 6 wherein the fingers house motors.
21. The automated prosthetic hand of claim 20 wherein the motors are individually sealed.