Skip to content

Dynamic Rocker Back

Dynamic Rocker Back (DRBi)

Dynamic Rocker Back
The Seating Dynamics Rocker Back Interface is installed between the seat and the back of a wheelchair and provides movement of the back to absorb forces and assist the client back to upright. This movement can protect both the client from injury and the seating system and mobility base from breakage. This movement can also reduce extension and provide movement to reduce agitation, increase alertness, and provide sensory input. Movement can also facilitate functional activities. Finally, movement against resistance in a limited range can increase trunk and head control.

The Seating Dynamics Rocker Back interface (DRBi) is the original and most widely used aftermarket bolt on “dynamic back”. In ten years of production, it has grown from a single wheelchair application to currently being available for approximately fifty different manual and power wheelchairs. It is two self-contained suspension assemblies installed between each of the seat rails and the back canes of a wheelchair. The design incorporates both impact and rebound control using urethane elastomers. Each unit ships with a full set of four different elastomers to allow fine tuning to the individual user’s requirements.

SeatingDynamics-DRBI-latchThe back can be latched to lock out this movement. It is our recommendation that the latch plate be in the UNLOCKED position at all times with two exceptions:

  1. When the wheelchair is being transported in a vehicle.
  2. When the wheelchair is being pushed by an attendant on a rough surface to reduce the risk of inducing spasms due to movement of the wheelchair.

The DRBi latch plate is red to make this more conspicuous. When the latch plate is rotated to the up position, the word “Locked” is clearly readable and the dynamic function is disabled. When rotated to the down position, the word “Unlocked” is clearly readable and the dynamic function is enabled. The engraving gives a clear indication of the status of the latch plate, and the dynamic function. Check out this video on the Seating Dynamics Dynamic Rocker Back latch.

"I loved that I could add it to her existing chair without changing the whole system. The DRBi is the best purchase I’ve ever made for Hannah."- Vanessa, Hannah's Mom

Dynamic Rocker Back motion in response to sudden, intermittent client movements


Clinical Applications

The Dynamic Rocker Back moves posteriorly in response to client force and assists the client back to an upright starting position. The back is available with 4 different levels of resistance – the client should be able to move the back, yet still return to upright. The pivot point is such that the position of the pelvis is maintained upon return to upright, as well. This movement has numerous clinical applications:

  • The Dynamic Rocker Back absorbs forces exerted by the client which may have led to injury and equipment breakage in the past and can prevent future issues. The dynamic components absorb these excessive forces, protecting the client from injury and the wheelchair frame, seating system and hardware from breakage. Breakage may result in the client being unable to use their wheelchair and/or seating system until repairs are made.
  • The Dynamic Rocker Back absorbs forces resulting from active client extensor tone. By absorbing and diffusing these forces, extensor tone can be decreased. Reducing extensor tone can increase function, sitting tolerance, and conserve energy. Active range of motion at the hips is also provided, reducing risk and progression of range of motion losses.
  • The Dynamic Rocker Back movement provides vestibular input, increases alertness, decreases agitation, increases sitting tolerance, and increases function. This movement works well with clients who like to rock and seek out movement.
  • The Dynamic Rocker Back provides movement for the client against resistance to increase trunk strength and improve postural control.

Seating Dynamics PN 6100 Back Cane Saw & Drill Jig

Use the PN 6100 Back Cane Saw and Drill Jig to make DRBi installation easy.

Contact us today to learn more, or find a provider.

Seating Dynamics Dynamic Seating Sample Medical Justification Wording

Instructions on installing the Dynamic Rocker Back with the PN 6100 Back Cane Saw & Drill Jig

Instructions on changing the DRBi Elastomers