Abstract: Provided is a chair suited to the use of a keyboard or mouse, the chair has a seat 3 and a rocking backrest 4. The seat 3 comprises a first section 3a, 12a and a second section 3b, 12b. The first section 3a of the seat 3 is affixed to a seat-mounting shell 11 is attached to a base 9, via a seat-mounting fixture, so as to be slide forwards and backwards. The backrest 4 has a back cover 14, a back panel 15 and a cushion move downwards while rotating in a seesaw fashion during rocking. The front end of the back cover 14 is connected to the seat-mounting fixture 10 by means of a connecting pin 25. When the chair rocks, the seat 3 moves forwards as a whole while the second section 3b tilts backward.

Abstract: A rocking chair includes a seat, a backrest that is tiltable rearward, a locking spring portion that imparts resistance to the rearward tilting of the backrest, and a resilience adjustment member that changes the degree of resistance of the spring portion to the rearward tilting of the backrest. The resilience adjustment member is a cam that is rotationally operable by a person seated on a seat and the position in which rocking load due to the rearward tilting of the backrest is applied to the spring portion is changed by the cam, so that moment applied to the spring portion changes and the degree of resistance of the spring portion is adjusted.

Abstract: Provided is a chair suited to the use of a keyboard or mouse, the chair has a seat 3 and a rocking backrest 4. The seat 3 comprises a first section 3a, 12a and a second section 3b, 12b. The first section 3a of the seat 3 is affixed to a seat-mounting shell 11 is attached to a base 9, via a seat-mounting fixture, so as to be slide forwards and backwards. The backrest 4 has a back cover 14, a back panel 15 and a cushion move downwards while rotating in a seesaw fashion during rocking. The front end of the back cover 14 is connected to the seat-mounting fixture 10 by means of a connecting pin 25. When the chair rocks, the seat 3 moves forwards as a whole while the second section 3b tilts backward.