Chair with ergonomic motion features

1. A chair comprising:

a seat pan member; and

an ergonomic position sensor arrangement operatively connected to a portion of the chair, the sensor arrangement configured to sense proximity and position of a user seated on the seat pan member for outputting data to determine how the user is sitting in comparison to a predetermined target sitting position,

wherein the sensor arrangement includes a capacitance sensor that is configured to generate a capacitance field to sense the position of the user seated on the seat pan member relative thereto.

2. The chair according to claim 1 , further comprising an indicator that is configured to receive the data from the sensor arrangement and is configured to provide an indication to the user as to how the user is sitting in comparison to the predetermined target sitting position.

3. A chair according to claim 1 , wherein the portion of the chair incudes the seat pan member, and

wherein the sensor arrangement in communication with the controller is configured to sense a weight distribution of the user seated on the seat pan member to determine how the user is sitting in comparison to the predetermined target sitting position.

4. A chair according to claim 1 , wherein the sensor arrangement is configured to sense a posture of the user seated on the seat pan member to determine how the user is sitting in comparison to the predetermined target sitting position.

5. A chair according to claim 1 , wherein the sensor arrangement is configured to sense at least one of the position of lumbar area, the position of head area and the position of upper back area of the user seated on the seat pan member to determine how the user is sitting in comparison to the predetermined target sitting position.

6. A chair according to claim 1 , wherein the sensor arrangement is configured to also sense the movement of the user's body and/or the user's engagement and active use of the dynamic movements relative to the seat pan member so as to determine whether the user is sitting in a correct position and/or whether the user is moving correctly between various sitting positions.

7. A chair according to claim 1 , further comprising a seat back member operatively connected to the sensor arrangement,

wherein the sensor arrangement is configured to sense the position of back portions of the user seated on the seat pan member to determine how the user is sitting in comparison to the predetermined target sitting position.

8. A chair according to claim 1 , wherein the sensor arrangement is included as retrofitted to the portions of the chair using one or more attachment members.

9. The chair according to claim 8 , wherein the sensor arrangement is configured to provide an indication to the user as to how the user is sitting in comparison to the predetermined target sitting position.

10. A chair according to claim 8 , wherein the one or more attachment members are configured to attach the sensor arrangement to the portions of the chair, and

wherein the portions of the chair include one or more of the seat pan member, a lumbar support member, a headrest, and a seat back member.

11. A chair according to claim 10 , wherein the one or more attachment members are selected from the group consisting of elastomeric straps or members, hook and loop type fastening members, removable attachment members and non-permanent attachment members.

12. A chair according to claim 1 , wherein the sensor arrangement is configured to sense the position of the user seated on the seat pan member through at least one of the material of the seat pan member of the chair, the material of a lumbar support member of the chair, the material of a seat back member of the chair, and the material of a headrest of the chair.

13. The chair according to claim 1 , wherein the capacitance field of the sensor arrangement is configured to travel a distance through the material of the chair to sense the position of the user relative to the seat pan member and/or to sense the position of the user seated on the seat pan member.

14. A chair comprising:

a seat pan member; and

an ergonomic position sensor arrangement operatively connected to a portion of the chair, the sensor arrangement configured to sense proximity and position of a user seated on the seat pan member for outputting data to determine how the user is sitting in comparison to a predetermined target sitting position,

further a movement support frame, and at least two movement support members operatively connected to the seat pan member and the movement support frame,

wherein the at least two movement support members are configured to support and guide the seat pan member in a controlled floating manner for dynamic movement with respect to the movement support frame in at least two degrees of freedom of the seat pan member, the at least two degrees of freedom being parallel to a horizontal seating plane, to enable the user move between various sitting positions.

15. A chair comprising:

a seat pan member; and

an ergonomic position sensor arrangement operatively connected to a portion of the chair, the sensor arrangement configured to sense proximity and position of a user seated on the seat pan member for outputting data to determine how the user is sitting in comparison to a predetermined target sitting position,

wherein the sensor arrangement includes a capacitance sensor that is configured to generate a capacitance field to sense the position of the user seated on the seat pan member, and

wherein the capacitance field of the sensor arrangement is configured to travel a distance through the material of the seat pan member of the chair, the material of a lumbar support member of the chair, the material of a seat back member of the chair, and/or the material of a headrest of the chair to sense the position of the user seated on the seat pan member.

16. A chair comprising:

a seat pan member; and

an ergonomic position sensor arrangement operatively connected to a portion of the chair, the sensor arrangement configured to sense the position of a user seated on the seat pan member for outputting a signal to indicate how the user is sitting in comparison to a predetermined target sitting position,

wherein the sensor arrangement includes a capacitance sensor that is configured to generate a capacitance field to sense the position of the user seated on the seat pan member, and

wherein the capacitance field of the sensor arrangement is configured to travel a distance through the material of the chair to sense the position of the user seated on the seat pan member.

17. An ergonomic position sensor arrangement for use with a chair with a seat pan member, the sensor arrangement comprising:

a sensor housing including a sensor configured to sense the position of a user seated on the seat pan member for outputting data to determine how the user is sitting in comparison to a predetermined target sitting position,

wherein the sensor includes a capacitance sensor that is configured to generate a capacitance field to sense the position of the user seated on the seat pan member, and

wherein the capacitance field of the sensor is configured to travel a distance through the material of the chair to sense the position of the user seated on the seat pan member; and

one or more attachment members secured to the sensor housing, wherein the one or more attachment members are configured to removably attach the sensor housing to the portions of the chair.

18. The sensor arrangement according to claim 17 , wherein the sensor arrangement is configured to provide an indication to the user as to how the user is sitting in comparison to the predetermined target sitting position.