The invention discloses a lightweight folding chair, comprising a chair seat and a bottom bracket assembly; the assembly comprises a frame member in the middle that comprises left rear, right rear, left front, and right front connectors, and rear, left, front, and right horizontal tubes that sequentially connect the left rear, right rear, left front, and right front connectors together; a backrest tube is connected to each upper end of the left rear and right rear connectors through the elastic cord; an upper support tube is connected to each upper end of the left front and right front connectors through the elastic cord. The angle of the leg tube is small and the stress is good during use; after the invention is folded, the components are brought close together, the folded volume is smaller, which does not occupy much space and is more convenient to be carried and transported.

The invention discloses a lightweight folding chair, comprising a chair seat and a bottom bracket assembly; the assembly comprises a frame member in the middle that comprises left rear, right rear, left front, and right front connectors, and rear, left, front, and right horizontal tubes that sequentially connect the left rear, right rear, left front, and right front connectors together; a backrest tube is connected to each upper end of the left rear and right rear connectors through the elastic cord; an upper support tube is connected to each upper end of the left front and right front connectors through the elastic cord. The angle of the leg tube is small and the stress is good during use; after the invention is folded, the components are brought close together, the folded volume is smaller, which does not occupy much space and is more convenient to be carried and transported.

The present disclosure discloses a chair and a chair base. The chair base comprises a connection pipe, four support legs, and two C-shaped swinging rods. The four support legs are respectively disposed along four directions. The two support legs disposed in a left-to-right direction are fixedly connected to the connection pipe, and lower sides of middle portions of the two support legs are respectively disposed with a hinge piece. The two support legs disposed in a front-to-rear direction are rotatably connected to the connection pipe and comprise sliding sleeves. Two ends of the two C-shaped swinging rods are respectively rotatably connected to the hinge pieces of the two support legs disposed in the left-to-right direction. Middle portions of the two C-shaped swinging rods are respectively connected to the sliding sleeves of the two support legs disposed along the front-to-rear direction through link rods.

The present disclosure discloses a chair and a chair base. The chair base comprises a connection pipe, four support legs, and two C-shaped swinging rods. The four support legs are respectively disposed along four directions. The two support legs disposed in a left-to-right direction are fixedly connected to the connection pipe, and lower sides of middle portions of the two support legs are respectively disposed with a hinge piece. The two support legs disposed in a front-to-rear direction are rotatably connected to the connection pipe and comprise sliding sleeves. Two ends of the two C-shaped swinging rods are respectively rotatably connected to the hinge pieces of the two support legs disposed in the left-to-right direction. Middle portions of the two C-shaped swinging rods are respectively connected to the sliding sleeves of the two support legs disposed along the front-to-rear direction through link rods.

A collapsible seat having a base and configured to alternatively take a use position and a storage position wherein the seat is collapsed. The seat includes first and second modules. The first module rotates in a vertical plane having longitudinal elements forming a deformable quadrilateral. The first module is articulated about an axis of rotation mounted on a fixed support and, in the use position, at least two longitudinal elements are in surface contact blocking rotation of the first module along a direction of rotation. The second module, mobile in rotation in the same vertical plane as the first module, has a support leg for surface contact with the ground in the use position and a connecting rod fixed between the first module and the support leg. In the use position, the connecting rod and the support leg are in surface contact blocking rotation of the second module.

A folding chair (100) comprises as main components a mainframe (1), a seat (2) and a back leg support (3). At least one of the main components is uniplanar and the others fit within a plane of the at least one main component when the chair (100) is collapsed. The folding chair (100) uses a type A construction, and forward movement of the top of the seat (2) relative to the mainframe (1) causes the back leg support (3) to move backwards relative to the mainframe (1).

A portable lightweight cheering apparatus integrated with a collapsible tubular frame chair. The apparatus comprises sound recordings, electronic equipment to store the sound recordings, and devices to convert the recordings to sounds reproduced by built-in speakers A push of any one of momentary pushbutton switches disposed on the chair armrest sides will cause a recording sound to emanate from the speakers; a tap on any one of momentary pad switches will cause a recorded drum sound to emanate from the speakers enabling a user to be a virtual drummer and a virtual cheering group.

A portable lightweight cheering apparatus integrated with a collapsible tubular frame chair. The apparatus comprises sound recordings, electronic equipment to store the sound recordings, and devices to convert the recordings to sounds reproduced by built-in speakers A push of any one of momentary pushbutton switches disposed on the chair armrest sides will cause a recording sound to emanate from the speakers; a tap on any one of momentary pad switches will cause a recorded drum sound to emanate from the speakers enabling a user to be a virtual drummer and a virtual cheering group.

The present disclosure discloses a chair and a chair base. The chair base comprises a connection pipe, four support legs, and two C-shaped swinging rods. The four support legs are respectively disposed along four directions. The two support legs disposed in a left-to-right direction are fixedly connected to the connection pipe, and lower sides of middle portions of the two support legs are respectively disposed with a hinge piece. The two support legs disposed in a front-to-rear direction are rotatably connected to the connection pipe and comprise sliding sleeves. Two ends of the two C-shaped swinging rods are respectively rotatably connected to the hinge pieces of the two support legs disposed in the left-to-right direction. Middle portions of the two C-shaped swinging rods are respectively connected to the sliding sleeves of the two support legs disposed along the front-to-rear direction through link rods.

The present disclosure discloses a chair and a chair base. The chair base comprises a connection pipe, four support legs, and two C-shaped swinging rods. The four support legs are respectively disposed along four directions. The two support legs disposed in a left-to-right direction are fixedly connected to the connection pipe, and lower sides of middle portions of the two support legs are respectively disposed with a hinge piece. The two support legs disposed in a front-to-rear direction are rotatably connected to the connection pipe and comprise sliding sleeves. Two ends of the two C-shaped swinging rods are respectively rotatably connected to the hinge pieces of the two support legs disposed in the left-to-right direction. Middle portions of the two C-shaped swinging rods are respectively connected to the sliding sleeves of the two support legs disposed along the front-to-rear direction through link rods.