Abstract: An adjustable chair headrest, relating to the technical field of office chairs, comprises a support rod connected to a chair back and a headrest, and further comprises an elastic sliding mechanism connecting the headrest and the support rod. The elastic sliding mechanism is provided with a lock mechanism and comprises a stop block, a sliding push rod and an elastic telescoping mechanism, and an end, away from the stop block, of the sliding push rod is connected to the headrest. One end of the sliding push rod stretches into a groove of the support rod, and a gap is reserved between the sliding push rod and one end of the stop block. A tension spring is disposed in the gap and has two ends respectively connected to the sliding push rod and the stop block. The headrest can extend and retract horizontally when users change their posture.

Abstract: An adjustable chair headrest, relating to the technical field of office chairs, comprises a support rod connected to a chair back and a headrest, and further comprises an elastic sliding mechanism connecting the headrest and the support rod. The elastic sliding mechanism is provided with a lock mechanism and comprises a stop block, a sliding push rod and an elastic telescoping mechanism, and an end, away from the stop block, of the sliding push rod is connected to the headrest. One end of the sliding push rod stretches into a groove of the support rod, and a gap is reserved between the sliding push rod and one end of the stop block. A tension spring is disposed in the gap and has two ends respectively connected to the sliding push rod and the stop block. The headrest can extend and retract horizontally when users change their posture.

Abstract: The present invention is about a chair back adjusting mechanism, and relates to the technical field of chairs. The chair back adjusting mechanism includes a chair back, which is movably disposed above a supporting surface of a chair seat and is provided with a connecting base at a side close to a fixed bracket, and the chair back is movably connected to the connecting base; the connecting base is provided with a first sleeve pipe at a side close to the fixed bracket, the fixed bracket is provided with a second sleeve pipe at a side close to the connecting base. The chair back is connected to a chair body by a sliding and elastic telescopic assembly, which reduces the user's feeling of fatigue and effectively relieves fatigue at the waist of sedentary people; and the chair back adjusting mechanism has a simple structure, which reduces the manufacturing cost.

Abstract: This invention is a backrest adjusting mechanism and a chair using the same and relates to the technical field of chairs. The backrest adjusting mechanism has a backrest, and the backrest is movably arranged above a support surface of a chair body, and a distance between the backrest and a backrest support plate of the chair body is adjustable; the backrest is provided with a connecting base on a side close to the backrest support plate of the chair body. The backrest adjusting mechanism has at least one set of sliding assembly, wherein the sliding assembly is configured to connect the connecting base and the backrest support plate of the chair body.

Abstract: An adjustable chair, belonging to the field of office furniture, comprising a base frame. A chair back is disposed at the rear end of the base frame. A lifting assembly is disposed on the base frame and provided with a seat, and comprises a bottom frame and a top frame formed with sliding slots. The seat is disposed on the top frame and the seat angle can be adjusted. By adjusting the height of the chair through the lifting assembly and adjusting the rotation angle of the seat, users not only can stand and lean against the chair, but also can normally sit on the chair.

Abstract: An adjustable chair, belonging to the field of office furniture, comprising a base frame. A chair back is disposed at the rear end of the base frame. A lifting assembly is disposed on the base frame and provided with a seat, and comprises a bottom frame and a top frame formed with sliding slots. The seat is disposed on the top frame and the seat angle can be adjusted. By adjusting the height of the chair through the lifting assembly and adjusting the rotation angle of the seat, users not only can stand and lean against the chair, but also can normally sit on the chair.

Abstract: A chair back, belonging to the field of office furniture, comprises a stretching mechanism, and a supporting mechanism including a supporting frame, an adjusting lever and a rotor disposed on the supporting frame, a spring disposed on the adjusting lever, and a rope wound across the rotor and having an end connected to the spring and an end connected to the stretching mechanism. A sliding slot is formed in the supporting frame. An adjusting block sliding along the sliding slot is disposed in the sliding slot and connected to the adjusting lever in a threaded manner, and has a side abutting against one end of the spring.

Abstract: The microfiber chalkboard eraser has a central core fully covered by a microfiber cleaning sheet with a finger holder cap covered on its top. The microfiber cleaning sheet cleans the chalkboard cleaner and reduces the air borne chalk dust compared to commonly used chalkboard erasers. The microfiber cleaning sheet has two sides that can be configured to form four cleaning surfaces, and can be washed or replaced when the two sides are soiled with chalk dust. Additionally, the finger holder cap can keep a user's hands free from chalk dust.