CN108528285B - A bus seat - Google Patents

Abstract

A new type of bus seat, belonging to the field of transportation facilities supplies, is composed of a seat frame, a luggage case fixing device, a movable seat back, a fixed seat back, an adjusting nut, an armrest A, an armrest B, a seat, a pedal, a spring, a connecting Composed of rod A, connecting rod B, smoke alarm and handle, the seat makes full use of the space under the seat. Compared with the existing bus seat, it has the function of fixing the luggage compartment. For the comfort of riding, the seat also has a smoke alarm and fire extinguishing device, which can remind passengers to escape from the bus and realize the fire extinguishing function, reducing the probability of fire accidents in the bus and reducing losses. The seat can be turned over to prevent the seat The front end of the seat is equipped with a pedal, and the pedal is connected with the seat through connecting rod A, connecting rod B and spring. When no one is riding, the pedal seat is placed vertically to prevent the seat from falling. dust.

Description

A bus seat

technical field

The invention relates to a bus seat, in particular to a seat that adopts a special structure and is equipped with a device capable of extinguishing fire, belonging to the field of traffic facilities supplies.

Background technique

Buses are the most common form of public transportation. With the development of urbanization, the urban population has greatly increased, and the demand for public transportation has also increased accordingly. Existing buses run on bumpy roads. The passengers in the car will feel a large amount of shaking, and it is difficult to sit and hold steady. Passengers with luggage have to hold the luggage all the time to prevent the luggage from sliding and damaging or injuring others. Sometimes the passengers do not It is not conducive to the safety of passengers. Due to the different nature of work of passengers on the bus, there will inevitably be some dust left on the seats of the bus, which is easy to contaminate the next person. The clothes of the passengers sitting in this seat, and the fire-fighting measures on the bus are not very sound. If the fire cannot be rescued in time, the bus will be burned beyond recognition. At present, the bus seat has a single function and only realizes the safety of riding. function, which not only wastes the space under the seat but also cannot better meet the needs of passengers.

SUMMARY OF THE INVENTION

In view of the above deficiencies, the present invention provides a bus seat.

The present invention is realized through the following technical solutions: a bus seat is composed of a seat frame, a luggage case fixing device, a movable seat back, a fixed seat back, an adjusting nut, an armrest A, an armrest B, a seat, a pedal, It is composed of a spring, a connecting rod A, a connecting rod B, a smoke alarm and a handle, and the trunk fixing device is composed of a fixed rod, a rotating rod, a magnet A, a magnet B, a clamp, a fixed rod gripper and a moving rod gripper The fixed seat back has a fire extinguishing device inside, the back of the fixed seat back has a back cover, which is connected to the back of the fixed seat back by bolts, and the fire extinguishing device is composed of a gas storage tank, a valve, a temperature sensing element The bottom end of the seat frame is a rectangular parallelepiped with threaded holes, the seat frame is fixed in the bus by bolts, and the front end of the seat frame is welded with pedal supports and pedal supports. There is a light hole on the seat frame, the rear end of the seat frame has a handle, and there is a handle bracket on the handle. The handle bracket and the handle are integrated. A seat support frame is welded between the seats, a thin-walled annular body is welded at the middle part of the seat support frame, and the left and right ends of the seat support frame are respectively welded at the upper position of the middle of the two uprights at the front end, and the seat frame is at the front end. There are bearing supports at the upper ends of the two uprights, two fixed seat back support brackets are welded between the two uprights at the rear of the seat frame, and the two uprights at the rear are hollow inside and have adjustment on the side of the uprights near the window. A nut, a luggage fixing device is installed on the column near the aisle, the fixing rod is fixed on the column near the aisle by screws, and there is a fixing rod gripper near the lower end of the fixing rod, and the fixing rod gripper is installed on the fixing rod by screws. There is a magnet A on the gripper of the fixed rod. The magnet A is glued to the gripper of the fixed rod. The upper end of the fixed rod has a light hole and is connected with the rotating rod through a hinge. The hand, the rotating rod gripper is fixed on the rotating rod by screws, the rotating rod gripper is provided with a magnet B, the magnet B is glued on the rotating rod gripper, and the opposite side of the rotating rod gripper is provided with a cylinder The clamp is an arc shape larger than a semicircle and smaller than a full circle. The center of the arc shape and the center of the light hole at the upper end of the fixing rod are on a vertical line, and the distance between the two centers is equal to the cylindrical protrusion structure on the rotating rod. The distance from the center of the circle to the center of the light hole at the upper end of the fixing rod. There is a horizontally placed cuboid beam between the front and rear columns of the seat frame. The cuboid beam is welded to the front and rear columns. There is a rectangular groove at the position of the cuboid beam close to the rear column. , the upper end of the cuboid beam is installed with armrest A and armrest B by screws. The front end of armrest A is provided with a cylindrical cup holder. The cup holder and armrest A are integrated. The upper end of the cup holder is open, and the bottom end of the cup holder is sealed. Slightly larger than the diameter of an ordinary beverage bottle, the pedal is a thin plate with a certain radian in the middle, and a pedal support is welded at the lower end of the pedal, the size is the same as the pedal support on the seat frame, the pedal and the seat frame pass through Bolt connection, the upper end of the pedal is welded with a connecting rod support, the pedal and connecting rod A are connected by a hinge, and the connecting rod A and the connecting rod A are connected by a hinge. One end of the pedal connection is semi-circular, and the end connected to the connecting rod B has a convex structure. The connecting rod A and the connecting rod B are connected by a hinge, and the end connecting the connecting rod B and the connecting rod A has a convex structure. , the other end of the connecting rod B is connected to the seat through a hinge, the end of the connecting rod B and the seat is semicircular, the seat is a thin plate with a rectangular surface, the front end of the seat is bent downward, the left and right sides of the seat are There is a rotating shaft at the middle position of both ends, which is connected with the bearing seat on the front end column of the seat frame through the bearing. There is a thin-walled annular body at the seat, the thin-walled annular body of the seat seat and the thin-walled annular body on the seat support frame are connected by springs, and the upper surface of the seat seat has a sponge pad, which is glued on the seat seat to fix the seat back. There are threaded holes on the rear end face of the seat, there are four threaded holes, the fixed seat back is fixed on the seat frame by screws, the back of the fixed seat back has a stepped groove, and there are threaded holes on the stepped groove, the fixed seat back There are threaded holes on the inner surface of the stepped groove, and the air storage tank is provided with an air storage tank bracket. The air storage tank bracket is fixed to the inside of the fixed seat back by screws. It is connected with the gas storage tank through a pipe joint, and the other end is connected with the valve through a pipe joint. The valve has threaded holes and temperature sensing elements. The valve is fixed on the back cover of the chair by screws, and the back cover of the chair is connected to the fixed chair by screws. At the rear end of the back, the back cover of the chair is embedded in the stepped groove on the back of the fixed seat back, and a smoke alarm is installed on the back cover of the chair. The smoke alarm is fixed on the back cover of the chair by screws. The smoke alarm is photoelectric smoke. Alarm, the movable seat back is a flat sheet structure, the front surface of the movable seat back is glued with a movable seat back sponge pad, there are movable rods on both sides of the movable seat back, the movable rod and the movable seat back are integrated, and the cross section of the movable rod is Rectangular, travel bars nested in uprights at the rear of the seat frame.

The handle is cylindrical, and the outside of the handle is surrounded by sponge.

The handrail A is installed on the side beam of the rectangular parallelepiped near the window, the material of the handrail A is plastic, the handrail B is installed on the side beam of the rectangular parallelepiped near the aisle, the material of the handrail B is plastic, the upper surface of the handrail B is flat, and the lower end is Cylindrical column, the shape of armrest B is T-shaped when viewed from the side.

The said connecting rod A and connecting rod B are rectangular in shape and hollow inside, and the material of connecting rod A and connecting rod B is 45 steel.

The size of the thin-walled annular body at the middle position near the rear end of the seat is consistent with the size of the thin-walled annular body on the seat support frame.

The shape of the back cover of the chair is rectangular, and the area of the back cover is slightly smaller than the projected area of the stepped groove for fixing the back of the chair.

The gas storage tank can be filled with carbon dioxide gas or inert gas.

The gas transmission pipe is a hose, the material of the gas transmission pipe is rubber and the inner layer is provided with a lining cloth.

The smoke alarm is a photoelectric smoke alarm.

The width of the movable seat back sponge pad is smaller than the width of the movable seat back, the length of the movable seat back sponge pad is smaller than the length of the movable seat back, and the thickness of the movable seat back sponge pad is slightly larger than that of the fixed seat back.

The advantages of the invention are that the seat makes full use of the space under the seat. Compared with the existing bus seat, it has the function of fixing the luggage, and the seat back is adjustable, which improves the riding comfort. The seat also has the function of alarm and fire extinguishing. The seat can be turned over to prevent dust from accumulating on the seat. The front end of the seat has a pedal. The pedal is connected to the seat through link A, link B, and spring. When riding, the pedal seat is placed vertically, which can prevent dust from falling on the seat. When the passenger sits on the seat, the pedal is placed nearly horizontally through the linkage of the connecting rod. To avoid the phenomenon of rubbing the knees due to the small distance between the two seats, there is a movable seat back on the column of the seat. You can adjust the height of the movable seat back by adjusting the adjustment nut on the column according to your personal preference. There is a water cup holder on the side armrest. Passengers carrying water cups can put the water cup in the water cup holder. Passengers do not need to hold the water cup all the time. , Injuring other passengers, there are smoke alarms and fire extinguishing devices installed on the seat backs. The smoke alarms are photoelectric smoke alarms. When the fire just broke out, the smoke particles are large, and the photoelectric smoke alarms can quickly sense and issue an alarm. When the temperature reaches the set value, the fire extinguishing device can spray the gas filled in the gas storage tank to realize the fire extinguishing function, and the luggage compartment is installed on the seat to fix The passenger carrying the suitcase can fix the suitcase on the gripper of the suitcase fixing device, and the gripper mountain is equipped with a magnet, which can adsorb the trolley of the suitcase on the magnet of the gripper, so that the suitcase can be fixed more firmly , The passenger does not need to hold the luggage, the seat is equipped with a handle, it is more convenient for passengers or children with a shorter height to grasp the handle, and the handle is covered with sponge to increase the comfort of grasping.

Description of drawings

Figure 1 is a schematic view of the structure of the present invention, Figure 2 is a schematic view of the back structure of the present invention, Figure 3 is a schematic view of the structure of a seat frame, Figure 4 is a schematic view of the internal structure of the fixed seat back, and Figure 5 is a schematic view of the fixed chair Figure 6 is a schematic diagram of the structure of the trunk fixing device, Figure 7 is a schematic diagram of the structure of the rotating rod, Figure 8 is a schematic diagram of the structure of the connecting rod A, and Figure 9 is a schematic structural diagram of the connecting rod B.

In the figure, 1. seat frame, 2. luggage compartment fixing device, 201, fixing rod, 202, rotating rod, 203, magnet A, 204, magnet B, 205, clamp, 206, fixing rod gripper, 207, rotating Rod gripper, 3. Moving seat back, 4. Fixed seat back, 401, Air storage tank, 402, Valve, 403, Temperature sensing element, 404, Air pipe, 405, Air storage tank bracket, 406, Chair back cover, 5. Adjusting nut, 6, armrest A, 7, armrest B, 8, seat, 9, pedal, 10, spring, 11, connecting rod A, 12, connecting rod B, 13, smoke alarm, 14, handle.

The position and shape of the device arranged inside the fixed seat back can be seen from FIG. 4 .

Detailed ways

A bus seat is composed of a seat frame 1, a trunk fixing device 2, a movable seat back 3, a fixed seat back 4, an adjusting nut 5, an armrest A6, an armrest B7, a seat 8, a pedal 9, a spring 10, The connecting rod A11, the connecting rod B12, the smoke alarm 13 and the handle 14 are composed. The luggage fixing device 2 is composed of a fixing rod 201, a rotating rod 20, a magnet A203, a magnet B204, a fixture 205, and a fixing rod gripper 206 and the moving lever gripper 207, the fixed seat back 4 has a fire extinguishing device inside, the back of the fixed seat back 4 has a back cover 406, which is connected to the back of the fixed seat back 4 by bolts, and the fire extinguishing device is It is composed of an air tank 401, a valve 402, a temperature sensing element 403, an air pipe 404 and an air tank bracket 405. The bottom end of the seat frame 1 is in the shape of a cuboid and has threaded holes. The seat frame 1 is fixed on the bus by bolts. Inside the car, the front end of the seat frame 1 is welded with a pedal support, the pedal support is provided with a light hole, the rear end of the seat frame 1 is provided with a handle 14, the handle 14 is provided with a handle bracket, and the handle bracket and the handle 14 are integrated, The handle 14 is fixed on the rear end of the seat frame 1 by screws, a seat support frame is welded between the two upright columns at the front end of the seat frame 1, and a thin-walled annular body is welded at the middle part of the seat support frame, and the seat support frame The left and right ends of the seat frame 1 are welded to the upper position of the middle of the two uprights at the front end. There are bearing supports at the upper ends of the two uprights at the front of the seat frame 1. Two fixed seat back support frames, the two columns at the rear are hollow inside and have adjustment nuts 5 on the side column near the window, and a luggage fixing device 2 is installed on the side column near the aisle, and the fixing rod 201 is through the screw It is fixed on the upright column near the aisle. The fixed rod 201 has a fixed rod gripper 206 near the lower end. The fixed rod gripper 206 is installed on the fixed rod 201 by screws. The fixed rod gripper 206 has a magnet A203, and the magnet A203 is glued on the fixed rod. On the fixed rod gripper 206, the upper end of the fixed rod 201 is provided with a light hole, and is connected with the rotating rod 202 through a hinge. The rotating rod 202 is provided with a rotating rod gripper 207 on the side close to the aisle, and the rotating rod gripper 207 is fixed by screws On the rotating rod 202, the rotating rod gripper 207 is provided with a magnet B204, the magnet B204 is glued on the rotating rod gripper 207, and the opposite side of the rotating rod gripper 207 is provided with a cylindrical convex structure, The clamp 205 is an arc shape larger than a semi-circle and smaller than a full circle. The center of the arc shape is on a vertical line with the center of the light hole at the upper end of the fixing rod 201, and the distance between the two centers is equal to the center of the cylindrical convex structure on the rotating rod 202. The distance between the center of the light hole at the upper end of the fixed rod, there is a horizontally placed rectangular cross beam between the front and rear uprights of the seat frame 1, the rectangular parallelepiped beam is welded with the front and rear uprights, and there is a rectangular groove at the position of the rectangular parallelepiped beam close to the rear upright post. Armrest A6 and armrest B7 are installed on the upper end of the cuboid beam through screws. The front end of armrest A6 is provided with a cylindrical cup holder. The cup holder and armrest A6 As a whole, the upper end of the water cup holder is open, the bottom end of the water cup holder is sealed, the inner surface diameter of the water cup holder is slightly larger than the diameter of the general beverage bottle, the pedal 9 is a thin plate with a certain arc at the middle position, and the lower end of the pedal 9 is welded with a pedal support , the size is consistent with the pedal support on the seat frame 1, the pedal 9 and the seat frame 1 are connected by bolts, the upper end of the pedal 9 is welded with a connecting rod support, and the pedal 9 and the connecting rod A11 are connected by hinges. The end of the rod A11 connected with the pedal 9 is semicircular, and the end connected with the connecting rod B12 has a convex structure, the connecting rod A11 and the connecting rod B12 are connected by a hinge, and the end of the connecting rod B12 and the connecting rod A11 With a protruding structure, the other end of the connecting rod B12 is connected to the seat 8 through a hinge, the end of the connecting rod B12 connected to the seat 8 is semicircular, the seat 8 is a thin plate with a rectangular surface, and the The front end is bent downward, and there is a rotating shaft at the middle of the left and right ends of the seat 8, which is connected with the bearing seat on the front end column of the seat frame 1 through bearings. The seat 8 has a thin-walled annular body at the middle position of the rear end. The thin-walled annular body of the seat 8 and the thin-walled annular body on the seat support frame are connected by a spring 10. The upper surface of the seat 8 has Sponge pad, the sponge pad is glued on the seat 8, there are threaded holes on the rear end surface of the fixed seat back 4, there are four threaded holes, the fixed seat back 4 is fixed on the seat frame 1 by screws, and the fixed seat back 4 There is a stepped groove on the back of the seat, there are threaded holes on the stepped groove, and there are threaded holes on the inner surface of the stepped groove for fixing the seat back 4. The bracket 405 is fixed to the interior of the fixed seat back 4 by screws, the lower end of the gas storage tank 401 is connected with an air delivery pipe 404, one end of the gas delivery pipe 404 is connected with the gas storage tank 401 through a pipe joint, and the other end is connected with the valve 402 through a pipe joint , the valve 402 is provided with a threaded hole and a temperature sensing element 403, the valve 402 is fixed on the back cover 406 of the chair by screws, the back cover 406 is connected to the rear end of the fixed seat back 4 by screws, and the back cover 406 is embedded in the fixed chair In the stepped groove on the back of the back 4, the smoke alarm 13 is installed on the back cover 406 of the seat, and the smoke alarm 13 is fixed on the back cover 406 by screws. The movable seat back sponge pad is glued to the surface, and there are movable rods on both sides of the movable seat back 3. The movable rod is integrated with the movable seat back 3. The cross section of the movable rod is rectangular, and the movable rod is nested in the back of the seat frame 1. end of the column.

The handle 14 is a cylinder, and the outside of the handle 14 is surrounded by sponge.

The handrail A6 is installed on the side beam of the rectangular parallelepiped near the window, the material of the handrail A6 is plastic, the handrail B7 is installed on the side beam of the rectangular parallelepiped near the aisle, the material of the handrail B7 is plastic, the upper surface of the handrail B7 is flat, and the lower end is Cylindrical column, the shape of the armrest B7 is T-shaped when viewed from the side.

The connecting rod A11 and the connecting rod B12 are rectangular in shape and hollow inside, and the connecting rod A11 and the connecting rod B12 are made of 45 steel.

The size of the thin-walled annular body at the middle position near the rear end of the seat 8 is consistent with the size of the thin-walled annular body on the seat support frame.

The shape of the seat back cover 406 is rectangular, and the area of the seat back cover 406 is slightly smaller than the projected area of the stepped groove for fixing the seat back 4 .

The gas storage tank 401 can be filled with carbon dioxide gas or inert gas.

The gas delivery pipe 404 is a hose, the material of the gas delivery pipe 404 is rubber and the inner layer has a lining cloth.

The smoke alarm 13 is a photoelectric smoke alarm.

The width of the movable seat back sponge pad is smaller than the width of the movable seat back 3 , the length of the movable seat back sponge pad is smaller than the length of the movable seat back 3 , and the thickness of the movable seat back sponge pad is slightly larger than that of the fixed seat back 4 .

When the device is in use, the passenger needs to turn the seat 8 horizontally, the seat 8 rotates, and the vertically placed pedal 9 rotates around the pedal support through the linkage of the link A11 and the link B12 to be nearly horizontal, and the passenger carries the luggage. When the swivel lever 202 on the seat frame 1 needs to be turned to a horizontal position, the drawbar of the luggage case should be pulled out and inserted into the fixed lever gripper 206 and the rotating lever gripper 207. Passengers can put the water cup they are carrying into the armrest A6 In the water cup holder, the passenger can grasp the handle 14 on the seat frame 1 when the hand of the passenger cannot reach the armrest on the bus, and the passenger can adjust the adjusting nut 5 on the seat frame 1 according to personal preference to adjust the moving seat back 3, rotate the adjusting nut 5 outward, and the moving seat back 3 can move up and down freely. After adjusting to the appropriate height, turn the adjusting nut 5 inward, and the moving seat back 3 will be stuck by the adjusting nut 5 and cannot be moved. When the smoke alarm 13 senses the smoke caused by the fire, it will give an alarm to remind passengers that when the fire temperature reaches the set value of the temperature sensing element 403, it will explode, the valve 402 will be opened, and the gas filled in the gas storage tank 401 will be discharged to Fire goes out.

For those of ordinary skill in the art, according to the teachings of the present invention, without departing from the principle and spirit of the present invention, changes, modifications, substitutions and alterations to the embodiments still fall within the protection scope of the present invention within.

Claims (1)

1. A bus seat is composed of a seat frame, a trunk fixing device, a movable seat back, a fixed seat back, an adjusting nut, an armrest A, an armrest B, a seat, a pedal, a spring, a connecting rod A, a connecting rod B. Composed of a smoke alarm and a handle, characterized in that the luggage case fixing device is composed of a fixed rod, a rotating rod, a magnet A, a magnet B, a clamp, a fixed rod gripper and a moving rod gripper, so There is a fire extinguishing device inside the fixed seat back, and the back of the fixed seat back has a back cover, which is connected to the back of the fixed seat back by bolts. The bottom end of the seat frame is cuboid and has threaded holes, the seat frame is fixed in the bus by bolts, the front end of the seat frame is welded with pedal supports, and the pedal supports are provided with light beams. The rear end of the seat frame is provided with a handle, the handle has a handle bracket, the handle bracket is integrated with the handle, the handle is fixed to the rear end of the seat frame by screws, and a chair is welded between the two uprights at the front end of the seat frame The seat support frame, the middle part of the seat support frame is welded with a thin-walled annular body, the left and right ends of the seat support frame are respectively welded at the upper position of the middle of the two front columns, and the seat frame is near the front end of the two columns. There is a bearing support at the upper end, and two fixed seat back support frames are welded between the two uprights at the rear of the seat frame. The interior of the two uprights at the rear is hollow and there is an adjusting nut on the side of the upright near the window, which is close to the aisle. A trunk fixing device is installed on the column on one side of the box, the fixing rod is fixed on the column near the aisle by screws, and there is a fixing rod gripper near the lower end of the fixing rod. There is a magnet A on it. The magnet A is glued to the gripper of the fixed rod. The upper end of the fixed rod has a light hole and is connected with the rotating rod through a hinge. The gripper is fixed on the rotating rod by screws, and there is a magnet B on the rotating rod gripper. The magnet B is glued on the rotating rod gripper, and the other side opposite to the rotating rod gripper has a cylindrical convex structure , the fixture is an arc shape larger than a semicircle and less than a full circle, the center of the arc shape and the center of the light hole at the upper end of the fixed rod are on a vertical line, and the distance between the two centers is equal to the center of the cylindrical convex structure on the rotating rod to the fixed rod The distance between the center of the light hole at the upper end, there is a horizontally placed cuboid beam between the front and rear pillars of the seat frame, the cuboid beam is welded with the front and rear pillars, the cuboid beam is close to the rear column and there is a rectangular groove, and the The upper end is installed with armrest A and armrest B. The front end of armrest A has a cylindrical cup holder. The cup holder is integrated with armrest A. The upper end of the cup holder is open, and the bottom end of the cup holder is sealed. The inner surface diameter of the cup holder is slightly larger than that of ordinary beverages. The diameter of the bottle, the pedal is a thin plate with a certain radian in the middle, the pedal support is welded at the lower end of the pedal, the size is the same as the pedal support on the seat frame, the pedal and the seat frame are connected by bolts, the pedal The upper end is welded with a connecting rod support, the pedal and connecting rod A are connected by hinges, and the end of connecting rod A connected with the pedal is Semi-circular, the end connected with the connecting rod B has a convex structure, the connecting rod A and the connecting rod B are connected by a hinge, and the end of the connecting rod B and the connecting rod A has a convex structure, and the connecting rod B has a convex structure. The other end is connected to the seat through a hinge, the end of the connecting rod B connected to the seat is semicircular, the seat is a thin plate with a rectangular surface, the front end of the seat is bent downward, and the middle position of the left and right ends of the seat is There is a rotating shaft, which is connected with the bearing seat on the front end column of the seat frame through the bearing. The left and right ends of the seat seat are behind the cylindrical convex structure, and the middle position of the seat seat near the rear end has a thin-walled annular body , the thin-walled ring body of the seat seat and the thin-walled ring body on the seat support frame are connected by springs, the upper surface of the seat seat has a sponge pad, the sponge pad is glued on the seat seat, and the rear end surface of the fixed seat back has Threaded holes, there are four threaded holes, the fixed seat back is fixed on the seat frame by screws, the back of the fixed seat back has a stepped groove, there are threaded holes on the stepped groove, the stepped groove of the fixed seat back There are threaded holes on the inner surface, and the gas storage tank is provided with a gas storage tank bracket. The gas storage tank bracket is fixed to the interior of the fixed seat back by screws. The lower end of the gas storage tank is connected with an air delivery pipe. The valve is connected by a pipe joint, and the other end is connected with the valve through a pipe joint. The valve has a threaded hole and a temperature sensing element. The valve is fixed on the back cover of the chair by screws. The back cover of the chair is embedded in the stepped groove on the back of the fixed seat back. A smoke alarm is installed on the back cover of the chair. The smoke alarm is fixed on the back cover of the chair by screws. The smoke alarm is a photoelectric smoke alarm. The back is a flat sheet structure. The front surface of the movable seat back is glued with a movable seat back sponge pad. There are movable rods on both sides of the movable seat back. The movable rod and the movable seat back are integrated. The cross section of the movable rod is rectangular. Set in the upright column at the rear of the seat frame; The handle is a cylinder, and the outside of the handle is surrounded by a sponge; The handrail A is installed on the side beam of the rectangular parallelepiped near the window, the material of the handrail A is plastic, the handrail B is installed on the side beam of the rectangular parallelepiped near the aisle, the material of the handrail B is plastic, the upper surface of the handrail B is flat, and the lower end is Cylindrical column, the shape of armrest B is T-shaped when viewed from the side; The connecting rod A and the connecting rod B are in the shape of a cuboid and hollow inside, and the material of the connecting rod A and the connecting rod B is 45 steel; The size of the thin-walled annular body at the middle position of the rear end of the seat is consistent with the size of the thin-walled annular body on the seat support frame; The shape of the back cover of the chair is rectangular, and the area of the back cover of the chair is slightly smaller than the projected area of the stepped groove of the fixed chair back; The gas storage tank can be filled with carbon dioxide gas or inert gas; The described gas transmission pipe is a hose, and the material of the gas transmission pipe is rubber and the inner layer is provided with a lining cloth; The smoke alarm is a photoelectric smoke alarm; The width of the movable seat back sponge pad is smaller than the width of the movable seat back, the length of the movable seat back sponge pad is smaller than the length of the movable seat back, and the thickness of the movable seat back sponge pad is slightly larger than that of the fixed seat back.

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