Most of the seats in the auditorium are composed of seat, back, armrest and standing feet. Generally, the feet and handrails are integrated to form a firmly installed handrail frame. The composition structure is generally steel wood structure or steel plastic structure.
Standing feet
It can be divided into two types: single foot landing (single foot landing) and handrail standing foot landing (standing foot is directly connected with handrail frame).
The center point of the single foot landing seat and the standing foot supporting seat is not only beautiful, but also convenient to connect the chair foot with other facilities of the environment, such as vent, power interface, etc. Due to the relatively complex connection mode of the single leg mechanism, the cost of the single leg mechanism is correspondingly increased.
The landing way of handrail feet is solid, reliable, convenient for fixing and installation. The handrail frame is combined with the feet, and the structure is simple.
Standing feet are the foundation of auditorium chairs, which are usually fixed on the ground directly with anchor bolts.
Handrail
The armrest of the auditorium chair is the basic support of the whole chair, and the main components of the chair are connected with the armrest.
Structure of handrail:
Metal frame: the framework of the armrest, which is basically the supporting connector of the whole auditorium chair.
Handrail board: made of wood or plastic and other materials,
Tablet mechanism: the armrest of the auditorium chair can be equipped with a tablet mechanism for meeting minutes.
Seat bag
It is generally composed of fabric, sponge pad, inner frame, rotating mechanism and outer plate.
Fabric: generally, hemp, velveteen, car velvet and other fabrics are used; some of them are made of leather, imitation leather and so on.
Sponge pad: it is made of PU foam, and the density is 40-60kg / m3.
Inner frame: according to different designs, the simple structure adopts curved wood plywood and plastic plate, and the advanced seat adopts spring metal frame and plastic inner shell.
Rotating mechanism: it is divided into gravity recovery mechanism and spring recovery mechanism. The gravity recovery mechanism is simple and reliable without maintenance. It is often equipped with rubber muffler pad to eliminate impact and noise during recovery. Spring recovery can reduce the volume of the recovery mechanism, make the structure design flexible and changeable. With damping device, the recovery movement can be controlled, slow down, and completely eliminate impact and noise Noise; another European patent technology from France, pneumatic recovery, has been introduced into the Chinese market. The starting device makes the seat cushion of the chair not make any disturbing noise during the process of lifting and recovery. It is light, elegant, safe, firm and hidden device, which does not affect the appearance of the seat.
Outer plate: it can be made of wood, plastic or other materials according to the design requirements, and its main function is to decorate and connect with the recovery mechanism.
knapsack
It is generally composed of fabric, sponge pad, inner lining plate and outer plate.
Fabric: generally, hemp, velveteen, car velvet and other fabrics are used; some of them are made of leather or imitation leather.
Sponge pad: it is made of PU (polyurethane) foam, and the density is 35-50kg / m3.
Inner lining board: according to different designs, curved wood plywood and metal frame structure can be used. When metal frame structure is used, it is called steel frame. Sometimes the steel frame is directly buried in sponge.
Outer board: it has the same function as the outer board of the seat. It can also be made of wood, plastic or other materials. Its main function is to decorate and connect with the handrail.
There is also a certain range of seat dimensions. According to the ergonomic design, the dimensions are generally controlled in:
Seat height: the distance from the highest point of seat surface to the ground, 400-420 for hard seat surface and 420-440mm for soft seat surface;
Seat width: the distance between two handrails; generally greater than 400mm;
Seat depth: the distance from the front edge of the seat plate to the backrest; generally 400-450mm;
Back height: the dimension from the seat plate surface to the highest point of the seat back;
Total height: the distance from the highest point of the seat back to the ground;
Handrail height: the distance from the highest point of handrail to the ground;
Total depth: the distance from the foremost point of the seat to the rearmost point of the seat back, generally affecting the row spacing of the seat;
Including the depth of writing board: the maximum depth of the seat when the writing board is opened;
Seat angle: the angle between the seat surface and the horizontal plane, generally 2-5 °;
Back angle: the angle between the back and the horizontal line, generally 100-106 °
Row distance: the distance between the front and back of two rows of seats;
Seat distance: also known as center distance, it refers to the distance between the left and right seats;
Arc row radius: row curvature radius of arc row;
In addition, a number of accessories are available, with the following features:
Writing board
The writing board is specially designed for the seat used in the meeting or teaching, which is convenient for taking notes and placing documents and books during the meeting or class. Generally, there are two kinds of clothing: the open and the hidden.
Cup holder
The cup holder can be divided into two types: the armrest cup holder and the external cup holder. The armrest cup holder is mainly used in cinemas and places where it is often necessary to use. Most of the armrest cup holders are designed to be integrated with the armrest.
The external cup holder is mainly used in meeting, classroom and other places, and can only be used when necessary. There are two types of external cup holders: front cup holder and rear cup holder.
Book net
Book net is also a special accessory for meeting chair.
Number plate
There are two kinds of number plates in common use, one is seat plate, the other is line plate. The seat plate indicates the number of the seat in each row, and the row number plate indicates the order of the row.
Movable feet and foot rest
In places where fixed installation is not allowed on the ground or the position needs to be changed frequently, movable feet or seats with movable feet need to be used. There are three forms of movable feet of Lijiang products