Pneumatic linkage type seat for oxygen cabin

Abstract

The utility model relates to the technical field of oxygen cabins, and discloses a pneumatic linkage type seat for an oxygen cabin, which is provided with a seat base, a cylinder controller and a linkage type backrest, and the seat base is provided with a base sliding framework fixed on a cabin bottom plate and a base pitching framework hinged on the base sliding framework; an air inlet of the air cylinder is connected with the induction type check valve to drive the base sliding framework to move front and back, and the pitching type linkage mechanism drives the base pitching framework to rotate and ascend and descend. The backrest frame and the seat base are hinged to the base backrest connecting piece and slide along the backrest sliding groove plate. The seat base is further provided with an air valve unlocking device, unlocking of the sliding rail locking rod and on-off of the three-way mechanical valve are achieved by pulling and pressing an unlocking control handle, the air cylinder is controlled to push the base sliding framework to move front and back, and the base pitching framework and the backrest frame are in synchronous pitching linkage. The pneumatic linkage type seat for the oxygen cabin is driven by high-pressure air, the adjustment angle of the seat is large, operation is convenient, and use is safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of medical or non-medical oxygen chambers, in particular to a pneumatic linkage seat for an oxygen chamber. Background Art

[0002] The statements in this section are merely to provide background technology related to the present utility model disclosure and do not necessarily constitute prior art.

[0003] The seats installed in the seated hard hyperbaric oxygen chamber provide users with a comfortable and pleasant sitting posture, and the backrest angle and base height need to be adjusted. The seats in existing oxygen chambers are generally fixed and non-adjustable, and there are also seats with simple manual adjustment or electric adjustment. Due to the compact volume inside the oxygen chamber, high-concentration oxygen is input during the operation of the oxygen chamber. The oxygen concentration in the cabin is strictly controlled according to relevant standards, but in some special cases, the oxygen concentration in the cabin may exceed the standard. Since electronic devices, especially electric motors, will inevitably generate fire and static electricity during operation, it may cause safety problems. There are strict restrictions on electrical appliances entering the cabin. Therefore, motors cannot be directly installed in the oxygen chamber to drive seat adjustment.

[0004] These existing technical methods have the disadvantages of large size, complex structure, inconvenient angle adjustment, uncomfortable sitting posture, and safety issues with electric entry into the cabin.

[0005] Therefore, the technical problem that the existing technology needs to solve is: how to adjust the angles of the backrest and the base to the maximum extent according to the user's own comfort needs under the condition of a compact cabin volume, so that the back and buttocks can be evenly supported, achieving an extremely comfortable sitting experience in zero gravity, and having the technical goal of easy and convenient adjustment and high safety. Utility Model Content

[0006] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a pneumatic linkage seat for an oxygen chamber which has a simple structure, a small size, is driven by high-pressure air, has a large seat adjustment angle, is safe and reliable to use, and has low noise.

[0007] The technical solution adopted by the utility model is: a pneumatic linkage seat for an oxygen cabin, which is installed on the cabin bottom plate of the oxygen cabin shell, and the seat has:

[0008] A seat base, wherein the seat base is provided with a base sliding frame fixed to the cabin bottom plate, and a base pitch frame hinged to the base sliding frame. The front end of the base pitch frame is hinged to the base sliding frame through a pitch linkage mechanism, and the rear end is hinged to the base sliding frame, and then the pitch linkage mechanism drives the base pitch frame to rotate and rise and fall. The seat base is also provided with a base reinforcement plate and a gas valve unlocking device; and

[0009] A cylinder controller, wherein the cylinder controller is provided with a cylinder fixed to the base reinforcement plate, the cylinder rod of the cylinder is fixed to the base reinforcement plate, the cylinder barrel of the cylinder is hinged to the base sliding frame, the cylinder pushes the base sliding frame to move forward and backward, and drives the base pitch frame to rotate and rise and fall through the pitch linkage mechanism, and the air inlet of the cylinder is connected to the induction check valve to drive the seat base to slide forward and backward; and

[0010] A linkage backrest, wherein the backrest frame and the seat base of the linkage backrest are respectively hinged to the base backrest connecting piece, the backrest frame is also fixedly connected to one end of the linkage support rod near the top, the other end of the linkage support rod is installed with an H-shaped groove bearing, the H-shaped groove bearing slides along the backrest slide plate, and the backrest slide plate is fixed to the oxygen chamber shell or the internal structure of the oxygen chamber;

[0011] Wherein: the base sliding frame is equipped with double-lock double slide rails, the lower lower rail of the double-lock double slide rails is installed on the base reinforcement plate, and a slide rail connecting plate is installed on each upper slide rail, and the upper slide rail and the slide rail connecting plate of the double-lock double slide rails can slide forward and backward a certain distance on the lower slide rail.

[0012] In this technical solution, the pitch linkage mechanism includes:

[0013] A pitch rod, one end of which is hinged on the side of the slide rail for rotation; and

[0014] A pitch rotating rod, one end of which is hinged to the pitch pulling rod, and the other end of which is hinged to the base reinforcement plate and one end of the hinged transition rod respectively; and

[0015] An articulated transition rod, the other end of which is articulated to the base pitch frame.

[0016] In the technical solution, a slide rail cross bar fixedly connected to the two slide rail connecting plates on both sides of the base slide frame is arranged between the two slide rail connecting plates, thereby ensuring the parallelism between the two slide rails and improving their forward and backward sliding performance.

[0017] In this technical solution, the air valve unlocking device has:

[0018] At least one unlocking control plate, at least one of the unlocking control plates slides on the W-shaped unlocking groove through a roller to push the slide rail locking rod to rotate and unlock;

[0019] An unlocking control handle, wherein the unlocking control handle is fixedly mounted on the outer sides of both ends of the unlocking connecting rod; and

[0020] Extended wings, the extended wings are installed on both sides of the upper end of the unlocking control panel, and the roller is installed on the unlocking control panel; and

[0021] An unlocking connecting rod, one end of which passes through two connecting slide rail connecting plates, and two unlocking control plates with rollers are symmetrically fixed on the inner side of the slide rail connecting plates.

[0022] In this technical solution, two sets of induction check valves and throttle valves are placed on the cylinder, and two three-way mechanical valves are cross-connected in sequence. The three-way mechanical valve is also connected to the high-pressure air supply pipe and the exhaust muffler. The three-way mechanical valve is installed on the seat base, so that it can muffle the exhaust while driving the seat base to move forward and backward.

[0023] In the technical solution, a throttle valve is installed at the air inlet of each of the induction check valves to adjust the flow rate of intake or exhaust.

[0024] In the technical solution, there are two three-way mechanical valves, which are respectively placed on the slide rail connecting plates, and a button cap is provided at the upper end thereof, and the button cap is installed at the lower end of the extended wing of the unlocking control panel.

[0025] In the present technical solution, the base backrest connector includes a backrest connector and a seat frame connector, one end of which is respectively connected to the backrest frame or the base pitch frame, and the other ends of the backrest connector and the seat frame connector are hinged through a backrest hinge shaft.

[0026] In the technical solution, a linkage extension rod is installed at one end of the linkage support rod, and a plurality of extension slots are provided on the linkage extension rod for adjusting the length and fastening with positioning screws.

[0027] In the technical solution, an H-shaped groove bearing is installed at one end of the linkage support rod close to the backrest slide plate, and the H-shaped groove bearing is inserted into the backrest slide plate of the oxygen cabin shell and slides.

[0028] In this technical solution, the unlocking control handle and the pitch linkage mechanism can be arranged on either side of the base sliding frame, and the cylinder, the gas spring and the three-way mechanical valve can be respectively installed on the left and right base sliding frames.

[0029] Compared with the prior art, the beneficial effects of the utility model are:

[0030] 1. The forward and backward movement of the base and the downward movement of the backrest are synchronized. In the compact oxygen chamber, the angles of the backrest and the base can be adjusted to the greatest extent, so that the back and buttocks can be evenly supported, achieving an extremely comfortable sitting experience in zero gravity.

[0031] 2. The cylinder is used as the power for the base to move, which is convenient for controlling the movement of the cylinder, with sufficient power and low noise. There is no need to use pneumatic motors or electric methods, and electricity does not enter the cabin, ensuring safe use.

[0032] 3. The induction check valve is used to control the air intake and exhaust of the cylinder, so that the speed of the cylinder piston can be adjusted and the cylinder stops when the air is cut off. At the same time, the lock rod of the double-lock slide rail is synchronously controlled to ensure that the slide rod is automatically and completely locked after the control rod returns to its position.

[0033] 4. The left-right symmetrical design structure is adopted to facilitate the left-right swapping installation of the unlocking control handle, cylinder, gas spring and three-way mechanical valve.

[0034] In summary, the pneumatic linkage seat for oxygen chamber of the utility model has a compact structure, is easy to assemble, is driven by high-pressure air, has a large seat adjustment angle, is easy to operate, and is safe and reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A three-dimensional structural diagram of an embodiment of a pneumatic linkage seat for an oxygen cabin;

[0036] Figure 2 A three-dimensional structural diagram of another embodiment of a pneumatic linkage seat for an oxygen cabin;

[0037] Figure 3 A view showing the installation of a pneumatic linkage seat for an oxygen cabin in an oxygen cabin;

[0038] Figure 4 A three-dimensional view of the rear side of the pneumatic linkage seat structure for the oxygen cabin;

[0039] Figure 5 This is a structural diagram of the pneumatic linkage seat for the oxygen cabin when it moves backward;

[0040] Figure 6 This is a structural diagram of the pneumatic linkage seat for the oxygen cabin when it moves forward;

[0041] Figure 7 A side view of the rearward movement of the pneumatically linked seat base for the oxygen chamber;

[0042] Figure 8 A side view of the forward movement of the pneumatically linked seat base for the oxygen chamber;

[0043] Fig. 9 This is the pneumatic control diagram of the pneumatic linkage seat cylinder for the oxygen cabin;

[0044] Fig.10 This is a diagram of the return position of the unlocking rod of the pneumatic linkage seat valve for the oxygen cabin;

[0045] Fig.11 Pull-up diagram of the air valve release lever of the pneumatic linkage seat for oxygen cabin;

[0046] Fig.12 This is a diagram of the release lever of the pneumatic linkage seat valve for the oxygen cabin;

[0047] Wherein: 10-seat base, 11-base sliding frame, 12-double lock double slide rail, 121-slide rail locking rod, 121a-W-shaped unlocking groove; 122-slide rail cross bar, 123-slide rail connecting plate, 124-locking rod spring, 125-upper slide rail, 126-lower slide rail; 13-base pitch frame, 131-base pitch frame connecting piece, 132-pitch frame rotating shaft, 14-pitch linkage mechanism, 141-pitch pull rod, 142-pitch rotating rod, 143-hinged transition rod, 15-base reinforcement plate, 151-support wing, 16-base pad, 17-backrest pad, 18-headrest, 19-valve unlocking device, 191-unlocking control panel, 192-unlocking control handle, 193-extended wing, 194-roller, 195-unlocking connecting rod;

[0048] 20-cylinder controller, 21-cylinder, 211-cylinder barrel, 212-cylinder rod, 213-cylinder rod screw, 22-induction check valve, 221-throttle valve; 23-three-way mechanical valve, 231-button cap, 25-three-way connector, 26-high-pressure air supply pipe, 27-exhaust muffler, 28 gas pressure spring;

[0049] 30-linked backrest, 31-backrest frame, 32-linked support rod, 321-linked extension rod, 322-extension slot, 323-positioning screw, 33-H-shaped slot bearing, 34-backrest hinge shaft, 35-backrest connector

[0050] 40-oxygen chamber shell, 41-cabin bottom plate, 42-backrest slide plate, 421-slide expansion hole. DETAILED DESCRIPTION

[0051] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0052] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the combination or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the embodiments of the present invention, the device positional relationships such as "up", "down", "front", "back", "left", "right", etc. in all the drawings are based on the orientation or positional relationship shown in the drawings. Figure 1 As standard.

[0053] like Figure 1 As shown, the pneumatic linkage seat for oxygen cabin is installed on the cabin bottom plate 41 of the oxygen cabin shell 40, and the seat has a seat base 10, a cylinder controller 20, and a linkage backrest 30:

[0054] The seat base 10 is provided with a base sliding frame 11 fixed on the cabin bottom plate 41, and a base pitch frame 13 hinged on the base sliding frame 11. The front end of the base pitch frame 13 is hinged to the base sliding frame 11 through a pitch linkage mechanism 14, and the rear end is hinged to the base sliding frame 11. The pitch linkage mechanism 14 drives the pitch linkage mechanism 14 to rotate, and then the base pitch frame 13 rotates a certain angle on the base sliding frame 11. The seat base 10 is also provided with a base reinforcement plate 15 and a gas valve unlocking device 19; combined with Figure 7 and Figure 8 , Fig. 9 As shown, the base sliding skeleton 11 is equipped with a double-lock double sliding rail 12, the lower sliding rail 126 of the double-lock double sliding rail 12 is installed on the base reinforcement plate 15, and a sliding rail connecting plate 123 is installed on each upper sliding rail 125. A sliding rail cross bar 122 is laterally fixed between the front ends of the two sliding rail connecting plates 123 of the base sliding skeleton 11 to ensure that the sliding rail connecting plates 123 are parallel to each other. The upper sliding rail 125 and the sliding rail connecting plate 123 of the double-lock double sliding rail 12 can slide forward and backward on the lower sliding rail 126 for a certain distance, and the moving distance is generally 100-300mm according to actual needs.

[0055] The cylinder controller 20 is provided with a cylinder 21 fixed on the base reinforcement plate 15, one end of the cylinder rod 211 of the cylinder 21 is fixed on the base reinforcement plate 15, one end of the cylinder barrel 211 of the cylinder 21 is hinged to the slide rail cross bar 122, and the cylinder 21 drives the seat base 10 to slide forward and backward. In the specific implementation process, the cylinder rod 212 is fixed to the support wing 151 of the base reinforcement plate 15 by a cylinder rod screw 213.

[0056] Combination Figure 4 , Figure 5 and Figure 6 As shown, the base pitch frame 13 is installed on the upper end of the base sliding frame 11, the rear end of the base pitch frame 13 is hinged to the slide rail connecting plate 123 through the pitch frame rotating shaft 132, and the front end is hinged to the front end of the slide rail connecting plate 123 through the pitch linkage mechanism 14. The pitch linkage mechanism 14 includes a pitch pull rod 141, a pitch rotating rod 142 and an articulated transition rod 143, as shown in FIG. Figure 5 and Figure 6As shown, the pitch rotating rod 142 is hinged in the middle on the slide rail connecting plate 123, the lower end of the pitch rotating rod 142 is hinged to the pitch pull rod 141, and the upper end is hinged to one end of the transition rod 143; the other end of the pitch pull rod 141 is hinged to the side of the base reinforcement plate 15. The upper end of the hinged transition rod 143 is hinged to the base pitch frame 13. When the double-lock double slide rail 12 and the base pitch frame 13 move forward and backward synchronously, the pitch rotating rod 142 can rotate back and forth at a certain angle under the push and pull of the pitch pull rod 141, and the base pitch frame 13 is rotated up and down at a certain angle through the hinged transition rod 143.

[0057] The backrest connector 35 of the linkage backrest 30 is hinged with the base pitch frame connector 131 of the seat base 10, and the linkage support rod 32 is installed near the top back of the backrest frame 31. Two linkage extension rods 321 are symmetrically installed at the other end of the linkage support rod 32, and an H-shaped groove bearing 33 is sandwiched in the middle to slide up and down in the arc groove of the backrest slide plate 42. The backrest slide plate 42 is fixed on the oxygen chamber shell 40 or the internal structure of the oxygen chamber.

[0058] In some embodiments, Figure 7 and Figure 8 As shown, the gas valve unlocking device 19 has at least one unlocking control plate 191, an unlocking control handle 192 and an unlocking connecting rod 195. The unlocking control plate 191 has two extended wings 193 at the upper end, and a roller 94 is installed at the lower end to slide in the W-shaped unlocking groove 121a of the slide rail lock rod 121. The unlocking control handle 192 is fixedly installed on one side of the two ends of the unlocking connecting rod 195. The two ends of the unlocking connecting rod 195 pass through two slide rail connecting plates 123, and at least one unlocking control plate 191 is fixed at both ends of the unlocking connecting rod 195. When the unlocking control handle 192 is manually pressed down or pulled up, the gas valve unlocking rod 19 rotates a certain angle, and the roller 194 of the unlocking control plate 191 slides in the W-shaped unlocking groove 121a on the slide rail lock rod 121. No matter whether the unlocking control handle 191 is manually pressed down or pulled up, the slide rail lock rod 121 is pressed down, so that the double-lock double slide rail 12 is unlocked, so that the double-lock double slide rail 12 can move forward and backward. When the unlocking control handle 191 is released, the slide rail locking rod 121 returns to the middle position of the curved surface of the W-shaped unlocking groove 121a under the action of the locking rod spring 124, so that the double-locking double slide rails 12 are locked and cannot move forward and backward.

[0059] In other embodiments, Fig. 9 As shown, two groups of induction check valves 22 and throttle valves 221 are arranged on the cylinder barrel 211 of the cylinder 21, and two three-way mechanical valves 23 are cross-connected in sequence. The three-way mechanical valves 23 are connected to the high-pressure air supply pipe 26 and the exhaust muffler 27 in sequence.

[0060] In some embodiments, the number of the three-way mechanical valves 23 is two, each of which is placed on the slide rail connecting plate 123. A button cap 231 is provided at the upper end of the three-way mechanical valve 23. The button cap 231 is located at the lower end of the two extended wings 193 of the unlocking control plate 191. When the unlocking control handle 192 is manually pressed down, as shown in FIG. Fig.12 As shown, the extended wing 193 of the unlocking control panel 191 presses the button cap 231 on the upper end of a three-way mechanical valve 23, so that the three-way mechanical valve 23 is connected to the air supply and is divided into two paths through the three-way joint 25. One path supplies air to the air inlet of an induction check valve 22 to supply air to one end of the cylinder 21, and the cylinder barrel 211 pushes the seat base 10 to move forward; the other path supplies air to the pilot port of another induction check valve 22, and the induction check valve 22 opens, so that the gas at the other end of the cylinder 21 is discharged through the exhaust muffler 232 of the three-way mechanical valve 23. The air inlets of the two induction check valves 22 are equipped with throttle valves 221 to adjust the flow rate of intake or exhaust, thereby adjusting the moving speed of the cylinder barrel 211.

[0061] When the unlocking control handle 192 is manually pulled up, Fig.11 As shown, another extended wing 193 of the unlocking control panel 191 presses the button cap 231 on the upper end of another three-way mechanical valve 23, so that the three-way mechanical valve 23 is connected to the air supply and is divided into two paths through the three-way connector 25, one of which supplies air to the air inlet of another induction check valve 22 and to one end of the cylinder 21, pushing the cylinder barrel 211 to move back.

[0062] When the unlocking control handle 192 is manually released, Fig.10 As shown, the three-way mechanical valve 23 does not output high-pressure air, the two induction check valves 22 are closed, and the cylinder 21 stops moving.

[0063] In some embodiments, Figure 4 and Figure 5 As shown, the base pitch frame connecting member 131 of the base pitch frame 13 is hinged to the backrest connecting member 35 of the backrest frame 31 through a backrest hinge shaft 34, so as to realize rotation adjustment between relative angles of the backrest frame 31 and the base pitch frame 13 under the connection of the backrest hinge shaft 34 to adapt to the comfort of the person sitting in the seat.

[0064] In some embodiments, Figure 4 As shown, a linkage extension rod 321 is installed at one end of the linkage support rod 32, and a plurality of extension slots 322 are provided on the linkage extension rod 321, which is fastened by positioning screws 323. In order to prevent the headrest 18 from rubbing against the oxygen chamber shell 40 or the gap between them is too large when the backrest frame 31 is tilted up and down, the installation position of the linkage extension rod 321 can be adjusted to extend or shorten the overall length of the linkage support rod 32.

[0065] In some embodiments, an H-shaped groove bearing 33 is installed at one end of the linkage support rod 32 close to the backrest slide plate 42, and the H-shaped groove bearing 33 is inserted into the backrest slide plate 42 of the oxygen chamber shell 40 and slides. Figure 4 , Figure 5 , Figure 6 As shown, the lower end of the backrest frame 31 of the linkage backrest 30 is hinged on the backrest hinge shaft 34 on the seat base 10, and the H-shaped groove bearing 33 of the linkage support rod 32 at the upper rear end of the backrest frame 31 is inserted into the backrest slide plate 42 of the oxygen chamber shell 111. When the seat base 10 moves forward, the H-shaped groove bearing 33 moves from top to outside in the backrest slide plate 42, and the backrest frame 31 lies flat. When the seat base 10 moves backward, the H-shaped groove bearing 42 moves upward in the slide plate 42, and the front tilt of the backrest frame 31 sits upright. In addition, as Figure 2 , Figure 3 As shown, a base cushion 16 is installed on the base pitch frame 13, and a back cushion 17 and a headrest 18 are installed on the back frame 31, so that the seat fits the human body better and the sitting posture is soft and comfortable.

[0066] In other embodiments, Figure 1 , Figure 4 and Figure 7 As shown, the unlocking control handle 192 and the pitch linkage mechanism 14 are respectively arranged on the left and right sides of the base sliding frame 11, the cylinder 21 and the gas pressure spring 28 are respectively installed on the support wings 151 of the left and right base reinforcement plates 15 and the slide rail cross bar 122, and the three-way mechanical valve 23 is placed on the slide rail connecting plate 123. When the seat base 10 is assembled, the cylinder 21, the gas pressure spring 28 and the three-way mechanical valve 23 can be installed in a left-right swap, which is suitable for oxygen cabins with left or right doors, and has better adjustable performance.

[0067] In other embodiments, Fig. 9 As shown, the gas spring 28 is installed on the support wing 151 of the base reinforcement plate 15 and the slide rail cross bar 122 to compensate for the thrust difference of the cylinder 21 when pushing the base sliding frame 11 forward and backward, so that the seat base 10 can be adjusted more smoothly.

[0068] In other embodiments, Figure 6 As shown, the upper end of the arc groove of the backrest slide plate 42 is provided with a slide groove expansion hole 421 for embedding the H-shaped groove bearing 33 into the arc groove of the backrest slide plate 42 during installation.

[0069] The embodiments disclosed in the present utility model are preferred embodiments, but are not limited thereto. Ordinary technicians in this field can easily understand the spirit of the present utility model based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present utility model, they are all within the protection scope of the present utility model.

Claims

1. A pneumatically linked seat for an oxygen chamber, mounted on a bottom plate (41) of an oxygen chamber shell (40), characterized in that: The seat has: A seat base (10), the seat base (10) being provided with a base sliding frame (11) fixed on the cabin bottom plate (41), and a base pitch frame (13) hinged on the base sliding frame (11), the front end of the base pitch frame (13) being hinged to the base sliding frame (11) via a pitch linkage mechanism (14), and the rear end being hinged to the base sliding frame (11), the pitch linkage mechanism (14) driving the base pitch frame (13) to rotate and rise and fall; and A cylinder controller (20), the cylinder controller (20) being provided with a cylinder (21) fixed on a base reinforcement plate (15), one end of a cylinder rod (212) of the cylinder (21) being fixed on the base reinforcement plate (15), one end of a cylinder barrel (211) of the cylinder (21) being hinged to a slide rail cross bar (122), and the cylinder (21) driving the seat base (10) to slide forward and backward; and A linkage backrest (30), wherein a backrest connecting member (35) of the linkage backrest (30) and a base pitch frame connecting member (131) of the seat base (10) are hingedly connected, a linkage support rod (32) is installed near the top back of the backrest frame (31), and two linkage extension rods (321) are symmetrically installed at the other end of the linkage support rod (32), and an H-shaped groove bearing (33) is sandwiched in the middle to slide up and down in the arc groove of the backrest slide plate (42), and the backrest slide plate (42) is fixed on the oxygen chamber shell (40) or the internal structure of the oxygen chamber.

2. The pneumatic linkage seat for oxygen chamber according to claim 1, characterized in that: The pitch linkage mechanism (14) comprises: A pitch rod (141), one end of which is hinged to a side surface of the slide rail (125); and A pitch rotating rod (142), wherein the middle of the pitch rotating rod (142) is hinged to the slide rail connecting plate (123), the lower end of the pitch rotating rod (142) is hinged to the pitch pulling rod (141), and the upper end is hinged to one end of the transition rod (143); and An articulated transition rod (143), wherein the upper end of the articulated transition rod (143) is articulated to the base pitch frame (13).

3. The pneumatic linkage seat for oxygen chamber according to claim 2, characterized in that: The base sliding frame (11) is equipped with a double-lock double sliding rail (12), the lower sliding rail (126) of the double-lock double sliding rail (12) is installed on the base reinforcing plate (15), and a sliding rail connecting plate (123) is installed on each of the upper sliding rails (125), and a transverse fixed sliding rail cross bar (122) is arranged between the front ends of the two sliding rail connecting plates (123) of the base sliding frame (11).

4. The pneumatic linkage seat for oxygen chamber according to claim 3, characterized in that: The seat base (10) is also provided with an air valve unlocking device (19), wherein the air valve unlocking device (19) comprises: At least one unlocking control plate (191), the unlocking control plate (191) having two extended wings (193) at the upper end and a roller (94) mounted at the lower end for slidingly fitting with a W-shaped unlocking groove (121a) of a slide rail locking rod (121); and An unlocking control handle (192), wherein the unlocking control handle (192) is fixedly mounted on one side of both ends of the unlocking connecting rod (195); and An unlocking connecting rod (195), wherein both ends of the unlocking connecting rod (195) pass through two slide rail connecting plates (123), and at least one unlocking control plate (191) is fixed to both ends of the unlocking connecting rod (195).

5. The pneumatic linkage seat for oxygen chamber according to claim 4, characterized in that: Two groups of induction check valves (22) and a throttle valve (221) are arranged on the cylinder barrel (211) of the cylinder (21), and are cross-connected with two three-way mechanical valves (23) in sequence. The three-way mechanical valves (23) are connected in sequence to a high-pressure air supply pipe (26) and an exhaust muffler (27).

6. The pneumatic linkage seat for oxygen chamber according to claim 5, characterized in that: There are two three-way mechanical valves (23), which are respectively placed on the slide rail connecting plate (123). A button cap (231) is provided at the upper end of the three-way mechanical valve (23). The button cap (231) is located at the lower end of the two extended wings (193) of the unlocking control plate (191).

7. The pneumatically linked seat for an oxygen chamber according to claim 6, characterized in that: The base pitch frame connecting piece (131) of the base pitch frame (13) and the backrest connecting piece (35) of the backrest frame (31) are hingedly connected via a backrest hinge shaft (34).

8. The pneumatically linked seat for an oxygen chamber according to claim 7, characterized in that: A linkage extension rod (321) is installed at one end of the linkage support rod (32). The linkage extension rod (321) is provided with a plurality of extension slots (322) and is fastened with a positioning screw (323).

9. The pneumatically linked seat for an oxygen chamber according to claim 8, characterized in that: A slide groove expansion hole (421) is provided at the upper end of the arc groove near the backrest slide groove plate (42) for mounting an H-shaped groove bearing (33) embedded in the arc groove of the backrest slide groove plate (42).

10. The pneumatic linkage seat for oxygen chamber according to claim 4, characterized in that: The unlocking control handle (192) and the pitch linkage mechanism (14) are respectively arranged on the left and right sides of the base sliding frame (11), and the cylinder (21), the gas pressure spring (28) and the three-way mechanical valve (23) can be installed in a left-right swap when the seat base (10) is assembled.

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