Mes Amis C Inc.
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Bionic Hand

“18 extensible gestures, flexible, robust, durable, light-weight and low cost.”
—OHand
Force and speed
  • Fully Open to Close Time: 0.8 seconds
  • Fully Close to Open Time: 0.8 seconds
  • Maximum Single Finger-tip Active Force: 450g
  • Maximum Pinch Finger-tip Active Force: 900g
  • Maximum Tripod Finger-tip Active Force: 1350g
  • Maximum Whole Hand Static Load: 20kg
  • Maximum Single Finger Static Load: 5kg
Grips
  • Upto 18 User Selectable Grips
  • Fully Close to Open Time: 0.8 seconds
  • Settings Configurable With user APP
Sizes
  • Vertical Distance From Middle Fingertip to Wrist: 179 mm
  • Vertical Distance From Thumb Fingertip to Wrist: 98 mm
  • Maximum Width of Palm: 83 mm
  • Wrist Height: 20 mm
  • Wrist Diameter: 53 mm
  • Wrist Rotation Range: +/-175 degrees
  • Thumb Maximum Bilateral Open and close Range: 0~31 degrees
  • Thumb Maximum Opposite Open and close Range: 0~50 degrees
Weight, Interface

Weight

  • 500g +/-10g

Interface

  • USB
  • BLE4.1
What Is an Artificial Limb?
"Prosthesis" is an artificial prosthesis specially designed and fabricated to compensate for amputees or incomplete limb defects by means of engineering and technology. Its main function is to replace the lost limb function, to help amputee get back certain life as take care of oneself and work ability. Its applicable user are those amputees suffered from disease, traffic accident, work accident, sports injury.
OHand Bionic Prosthesis
OHand is an intelligent bionic nerve prosthesis we developed, which is a comprehensive solution from sensors to artificial intelligence to precision machinery design. Through EMG sensor array technology, non-invasive monitoring of residual limb epidermis is used to detect nerve signals from underneath muscles, and AI intelligent algorithm is used to learn and classify them, so as to identify the user's gesture intention, and then make corresponding motion thru the bionic hand.
Forearm Amputee
OHand is a good choice for most forearm amputees. Technician makes the socket for the user using the traditional prosthetic socket fabrication process, and then install the OHand and EMG sensors. After, technicians set the parameters and grips of OHand based on user's requirement.
Upper Extremity

For above-elbow amputees, OHand can be a better choice. If the user's residual limb conditions allow, Targeted Muscle Reinnervation (TMR) surgery is suggested to enhance EMG signal and control. Users can also use the traditional two-electrode mode for control. OHand's total control solution allows users to control elbow, wrist and hand through software settings.

The case of above-elbow amputation is far more complicated than the case of the forearm. After evaluated by professional doctors, if the user's situation is good to take a TMR surgery, it will be of great benefit to the adoption of OHand prosthetic hand. Biologically, the nerves and muscles controlling fingers and wrists locate in the forearm of the human limb. With TMR surgery, nerves are transplanted to such positions as the upper arm, shoulder and chest muscles. When the user imagines certain hand movements, the EMG signals can be collected at these positions and hence being used for the control of the prosthesis.