An observer seat mounted across the rail

Abstract

This invention discloses a cross-track installation observer seat, belonging to the field of aviation seat technology. It includes a frame assembly and a floor connection assembly. The frame assembly includes two side plates arranged side-by-side on both sides of the seat. The floor connection assembly includes several frame connecting parts and guide rail connecting parts. The frame connecting parts are disposed in the gap formed between the two side plates. Each frame connecting part includes at least two sleeved chair tubes, wherein the ends of at least two chair tubes are respectively connected to the two side plates. The guide rail connecting part includes a first connecting part and a second connecting part, which are spaced apart and respectively connected to a guide rail for seat installation. The first connecting part and the second connecting part are respectively connected to one of the chair tubes of each frame connecting part. This invention can effectively absorb impact energy, has a reliable structure, and meets the airworthiness verification requirements for seat structural strength and deformation.

Description

Technical Field

[0001] This invention relates to the field of aircraft seat technology, and in particular to a transrail-mounted observer seat. Background Technology

[0002] The observer seats are for inspectors, regulatory personnel, flight instructors, and other personnel permitted to enter the cockpit, providing these crew members with safe and comfortable working and living conditions.

[0003] Observer seats have various installation structures, typically including wall-mounted, pull-out, and floor-mounted types. Floor-mounted observer seats, due to limited installation space, long cantilever ends, and overly compact mounting points, present significant technical challenges to the seat structure design. For example, CN216636835U discloses a seat rail mounting structure and an aircraft seat, comprising: two parallel and spaced-apart guide rails and a movable component. Each guide rail has at least one notch. The movable component includes a base, a movable part, and a limiting part. The base is movably engaged with the guide rail along its guide direction. The movable part is connected to the base and movably connected to the guide rail along its guide direction. When the movable part moves to the notch, the base can separate from the guide rail. The limiting part is connected to the base to restrict the base's movement relative to the guide rail.

[0004] It is evident that current aircraft seats use two parallel and spaced-apart guide rails to mount the entire seat structure. The mounting points are compact, and under the dynamic impact of an aircraft and the deformation of the floor, the connection points on the two guide rails are subjected to forces that are unbalanced. The existing observer seat structure cannot effectively absorb the energy generated by the aircraft under dynamic impact, and thus cannot guarantee flight safety. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a cross-track installation observer seat to solve the technical problem that the existing observer seat structure cannot effectively absorb the energy generated by the aircraft under dynamic impact conditions, thus failing to ensure flight safety.

[0006] To achieve the above-mentioned technical objectives, the present invention provides a cross-track installation observer seat, comprising: a frame assembly and a floor connection assembly. The frame assembly includes two side panels arranged side by side on both sides of the seat. The floor connection assembly includes a plurality of frame connecting parts and guide rail connecting parts. The plurality of frame connecting parts are disposed in the gap formed between the two side panels. Each frame connecting part includes at least two sleeved chair tubes, wherein the ends of at least two chair tubes are respectively connected to the two side panels. The guide rail connecting part includes a first connecting part and a second connecting part. The first connecting part and the second connecting part are spaced apart and respectively connected to a guide rail for mounting the seat. The first connecting part and the second connecting part are respectively connected to one of the chair tubes of each frame connecting part, and respectively connected to two different chair tubes in the frame connecting part, so that when the floor deforms, it acts on different chair tubes in the frame connecting part, and one of the connecting parts can rotate relative to the plurality of chair tubes.

[0007] In some embodiments, a first connecting portion is connected to one of the side plates, and a second connecting portion is spaced between the first connecting portion and the other side plate. The diameters of the chair tubes in each of the frame connecting portions are different, wherein the diameter of the chair tube connected to the second connecting portion is larger than the diameter of the chair tube connected to the first connecting portion.

[0008] In some embodiments, the second connecting portion includes a middle chair leg, a first front chair leg lock, and a first rear chair leg lock. The middle chair leg has mounting holes at positions corresponding to the chair tubes, allowing connection to each chair tube via these holes. The first front chair leg lock and the first rear chair leg lock are respectively located at the bottom ends of the middle chair leg, connecting to one of the guide rails used for mounting the seat. The diameter of the mounting holes gradually increases from one side to the other, with the smallest diameter forming a connection point with the chair tube, located away from the area where pitch deformation occurs. The first connecting portion includes a second front chair leg lock and a second rear chair leg lock, arranged side-by-side on the inner side of one of the side panels. Both locks are connected to a connecting frame on the inner side of the side panel and used to connect to another guide rail used for mounting the seat. Both side panels are connected to the chair tubes of the frame connecting portion via connecting frames on their inner sides. The bottom of the first front seat leg lock, the first rear seat leg lock, the second front seat leg lock, and the second rear seat leg lock all extend outward from both sides to form flanges. The first front seat leg lock and the second front seat leg lock are connected to the guide rail by providing three of the flanges. The first rear seat leg lock and the second rear seat leg lock are connected to the guide rail by providing four of the flanges.

[0009] In some embodiments, a fixing bolt is provided on the middle chair leg at a position corresponding to the chair tube, so that the chair tube is fixedly connected to the middle chair leg through the fixing bolt, wherein the hole on the chair tube connected to the fixing bolt is an oblong hole.

[0010] In some embodiments, the observer seat with a cross-track installation further includes a seat plate assembly, which includes a spring, a fixing block, a seat basin tube, two hanging plates, two limiting blocks, and a bottom seat plate. A seat basin rotation shaft is provided on the inner side of each of the two side plates, and the seat basin tube is connected between the two seat basin rotation shafts. The bottom seat plate is rotatably connected to the seat basin tube via a bushing. One end of the spring is secured to the bottom seat plate, and the other end is connected to the fixing block. The fixing block is fixed to the seat basin tube by screws, and the hanging plates connect the seat basin rotation shaft and the limiting blocks. The limiting blocks are connected to the side plates. A backrest is rotatably connected between the two limiting blocks. Rollers are provided on both sides of the top of the backrest. Guide grooves are provided on the side plates at positions corresponding to the rollers, and the guide grooves extend upwards from one side near the front of the seat to the other side.

[0011] In some embodiments, the frame assembly further includes a base plate and a top plate disposed between the bottoms of the two side plates. The top plate is disposed at a position corresponding to the seat. A storage space is also formed between the bottoms of the two side plates. The observer seat installed across the rails also includes a storage box assembly. The storage box assembly includes a storage box door, a life jacket box, a door lock, and a fixing member. The storage box door is disposed between one side of the two side plates, and the bottom end of the storage box door is rotatably connected to the base plate. The door lock is disposed on one side of its top end. The door lock is locked in cooperation with a pin disposed on the top plate. The storage box door is also provided with a life jacket box and the fixing member. When stored, the life jacket box is placed in the gap between several frame connecting parts and the frame assembly. The fixing member is connected to an interface extending from the chair tube.

[0012] Compared with the prior art, the beneficial effects of the present invention include: by setting a plurality of the frame connecting parts in the gap formed between the two side plates, a guide rail connecting part connected to the aircraft guide rail is provided between the two side plates. The guide rail connecting part includes a first connecting part and a second connecting part, which are respectively connected to one of the seat tubes of each frame connecting part, stably connecting the guide rail connecting part, the frame connecting part and the side plate together. The first connecting part and the second connecting part are respectively connected to two different seat tubes in the frame connecting part, so that when the floor deforms, under the condition of unbalanced force on the two guide rails, the energy generated at the first connecting part and the second connecting part will act on different seat tubes in the frame connecting part respectively. The two seat tubes are sleeved together, and one connecting part can rotate relative to multiple seat tubes, so that it can achieve hard deformation with the connected seat tubes, thereby effectively absorbing impact energy. The structure is reliable and meets the airworthiness verification requirements for seat structural strength and structural deformation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an embodiment of the cross-track installation observer seat provided by the present invention;

[0014] Figure 2 yes Figure 1 A three-dimensional structural diagram of the floor connection assembly and frame assembly of the cross-track installed observer seat;

[0015] Figure 3 yes Figure 1 A three-dimensional structural diagram of the floor connection assembly of the cross-track installed observer seat;

[0016] Figure 4 yes Figure 1 A cross-sectional structural diagram of the chair tube connection of the observer seat with a cross-rail installation.

[0017] Figure 5 yes Figure 1 A three-dimensional structural diagram of the seat plate assembly of the observer's seat with a cross-rail installation.

[0018] Figure 6 yes Figure 1 A cross-sectional structural diagram of the seat cushion of the observer's seat in the cross-rail installation.

[0019] Figure 7 yes Figure 1 A schematic diagram of the connection structure of the rollers of the cross-rail mounted observer seat;

[0020] Figure 8 yes Figure 1 A three-dimensional structural diagram of the storage compartment assembly of the observer seat with a cross-track installation.

[0021] Figure 9 yes Figure 1 A schematic diagram of the installation structure of the life jacket box for the observer seat in the cross-track installation.

[0022] In the picture:

[0023] 1. Frame assembly; 11. Side panel; 12. Top panel; 13. Pins;

[0024] 2. Floor connection assembly; 21. Frame connection part; 211. Chair tube; 22. Guide rail connection part; 221. First connection part; 2211. Second front chair leg lock; 2212. Second rear chair leg lock; 222. Second connection part; 2221. Middle chair leg; 2222. First front chair leg lock; 2223. First rear chair leg lock; 2224. Fixing bolt; 2225. Flange; 2226. Waist-shaped hole;

[0025] 3. Seat assembly; 31. Spring; 32. Fixing block; 33. Seat basin tube; 34. Hanging plate; 35. Limiting block; 36. Bottom seat plate; 37. Seat basin rotation shaft; 38. Seat cushion;

[0026] 4. Backrest assembly; 41. First backrest; 42. Second backrest; 43. Casters; 44. Guide groove;

[0027] 5. Storage box assembly; 51. Storage box door; 52. Life jacket box; 53. Door lock; 54. Fasteners;

[0028] 6. Headrest; 7. Seatbelt. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] like Figures 1 to 9As shown, the present invention provides a cross-track installation observer seat, comprising: a frame assembly 1 and a floor connection assembly 2. The frame assembly 1 includes two side panels 11 respectively arranged side by side on both sides of the seat; the floor connection assembly 2 includes a plurality of frame connecting parts 21 and guide rail connecting parts 22. The plurality of frame connecting parts 21 are disposed in the gap formed between the two side panels 11, and each frame connecting part 21 includes at least two sleeved chair tubes 211, wherein the ends of at least two chair tubes 211 are respectively connected to the two side panels 11; the guide rail connecting parts... 22 includes a first connecting portion 221 and a second connecting portion 222. The first connecting portion 221 and the second connecting portion 222 are spaced apart and respectively connected to guide rails for mounting seats. The first connecting portion 221 and the second connecting portion 222 are respectively connected to one of the chair tubes 211 of each of the frame connecting portions 21, and are respectively connected to two different chair tubes 211 in the frame connecting portion 21, so that when the floor deforms, it acts on different chair tubes 211 in the frame connecting portion 21, and one of the connecting portions can rotate relative to several chair tubes 211.

[0031] In this device, by distributing a plurality of the frame connecting portions 21 in the gap formed between the two side plates 11, a guide rail connecting portion 22 connected to the aircraft guide rail is provided between the two side plates 11. The guide rail connecting portion 22 includes a first connecting portion 221 and a second connecting portion 222, which are respectively connected to one of the seat tubes 211 of each frame connecting portion 21, thus stably connecting the guide rail connecting portion 22, the frame connecting portion 21, and the side plate 11 together. Furthermore, the first connecting portion 221 and the second connecting portion 222 are respectively connected to... The chair tubes 211 are connected to two different chair tubes 211 in the frame connection part 21. When the floor deforms, under the condition of unbalanced force on the two guide rails, the energy generated at the first connection part 221 and the second connection part 222 will act on the different chair tubes 211 in the frame connection part 21 respectively. The two chair tubes 211 are sleeved together, and one connection part can rotate relative to multiple chair tubes 211, so that it can achieve hard deformation with the connected chair tubes 211, thereby effectively absorbing impact energy. The structure is reliable and meets the airworthiness verification requirements for seat structural strength and structural deformation.

[0032] It should be noted that the main purpose of connecting the first connecting part 221 and the second connecting part 222 to the chair tube is to enable the first connecting part 221 and the second connecting part 222 to act on different chair tube parts 211 in the frame connecting part 21 when the floor deforms. They can be connected directly to the chair tube parts 211 or indirectly to the chair tube parts 211 through a connecting structure, as long as the force distribution can be achieved.

[0033] To improve the overall strength of the seat, such as Figure 1 , Figure 2 As shown, in some embodiments, a first connecting portion 221 is connected to one of the side plates 11, and through this side plate 11, it connects to one of the chair tubes 211 of each of the frame connecting portions 21. A second connecting portion 222 is spaced between the first connecting portion 221 and the other side plate 11, and it directly connects to the other chair tubes 211 in each of the frame connecting portions 21. The diameters of the chair tubes 211 in each of the frame connecting portions 21 are different. The second connecting portion 222... The diameter of the connected chair tube 211 is larger than the diameter of the chair tube 211 connected to the first connecting part 221. Under the condition of meeting the strength requirements, a combination of thick and thin tubes can be used. In this embodiment, the chair tube 211 of the frame connecting part 21 is provided with two sections. By adopting the form of left and right sleeves, it can reduce weight and facilitate the floor deformation condition. There are three frame connecting parts 21. The three frame connecting parts 21 are arranged side by side and staggered, so that the second connecting part 222 and the three frame connecting parts 21 form a stable triangular connection.

[0034] It should be noted that this solution does not limit the number of chair tubes 211 and frame connecting parts 21. In other embodiments, the chair tubes 211 of the frame connecting parts 21 can be set to two or more sections, and the frame can be two or three or more. They can also be installed in a sequential parallel arrangement or other installation methods.

[0035] To facilitate the explanation of the connection method between the guide rail connection part 22 and the frame connection part 21, the two chair tubes 211 are defined as the left chair tube and the right chair tube according to their left and right positions when facing the heading. The second connection part 222 is the main stress point, so the left chair tube needs to be a thicker tube so that the diameter of the left chair tube is larger than that of the right chair tube.

[0036] The second connecting part 222 adopts a connection method that directly connects to the chair tube 211, specifically, as follows: Figures 2 to 4As shown, in some embodiments, the second connecting part 222 includes a middle chair leg 2221, a first front chair leg lock 2222, and a first rear chair leg lock 2223. The middle chair leg 2221 is provided with mounting holes at positions corresponding to the chair tubes 211, so that the middle chair leg 2221 can be connected to each of the chair tubes 211 through the mounting holes. The first front chair leg lock 2222 and the first rear chair leg lock 2223 are respectively provided at the bottom ends of the middle chair leg 2221 for connecting one of the guide rails used for mounting the seat. Floor rails typically have asymmetrical interfaces, which increases the design complexity of the seat floor connection interface while meeting strength and airworthiness regulations. To allow the middle chair leg 2221 to rotate relative to the chair tube 211, the mounting holes are designed with diameters gradually increasing from one side to the other. The smallest diameter hole forms the connection point with the chair tube 211, and this connection point is located away from the area where pitch deformation occurs. Specifically, the mounting hole is fitted onto the left chair tube, with the smallest diameter hole fitting snugly against it. The other parts are designed with a flared shape, allowing the left chair tube to accommodate lateral or vertical rotation of the middle chair leg 2221 during floor deformation. The left chair tube then swings relative to the mounting hole, achieving a cross-rail installation. This ensures the seat meets airworthiness regulations for floor deformation under 16g dynamic testing, minimizing the impact on the main structure after deformation to meet overall strength requirements.

[0037] Furthermore, to accommodate the movable connection between the middle chair leg 2221 and the left chair tube, in this embodiment, a fixing bolt 2224 is provided on the middle chair leg 2221 at a position corresponding to the chair tube 211, so that the chair tube 211 is fixedly connected to the middle chair leg 2221 through the fixing bolt 2224. The hole on the chair tube 211 connected to the fixing bolt 2224 is a waist-shaped hole 2226. Specifically, the middle chair leg 2221 is provided with a frame with a sleeve, and the waist-shaped mounting hole is formed in the sleeve. That is, the waist-shaped hole 2226 is opened on the left chair tube at a position corresponding to the fixing bolt 2224, and one end of the right chair tube extends to the connection between the left chair tube and the middle chair leg 2221, which is also connected to the fixing bolt 2224 through the waist-shaped hole 2226, so that the middle chair leg 2221 can rotate at multiple angles relative to the frame connection part 21, which can meet the floor deformation requirements of the 16g dynamic test.

[0038] In this solution, the energy generated is mainly absorbed through the movable connection of the second connecting part 222. Therefore, the first connecting part 221 mainly provides fixed support for the chair tube 211 of the frame connecting part 21. In some embodiments, the first connecting part 221 includes a second front chair leg lock 2211 and a second rear chair leg lock 2212. The second front chair leg lock 2211 and the second rear chair leg lock 2212 are distributed side by side on the inner side of one of the side plates 11 and are connected to the connecting frame on the inner side of the side plate 11. In order to maintain the consistency and aesthetics of the appearance of the side plate 11, the chair leg lock is fixed by connecting the screw to the internal thread on the side plate 11 through an adapter, without damaging the appearance of the side plate 11. The second front seat leg lock 2211 and the second rear seat leg lock 2212 are used to connect to another guide rail for installing the seat. The connecting frame on the inner side of the two side plates 11 has fixing holes with the same diameter as the corresponding seat tube 211, allowing direct connection to the left and right seat tubes for easy assembly and subsequent fixing. This allows the second front seat leg lock 2211 and the second rear seat leg lock 2212 to connect to the three right seat tubes via the side plates 11. During seat installation, the two rear seat leg locks must first be removed to ensure the two front seat leg locks can slide into the guide rail and be fixed. After fixing the front seat leg locks, flip the seat forward and slide the two rear seat leg locks into the appropriate positions and fix them. Finally, connect the rear seat leg locks to the seat frame with screws.

[0039] Furthermore, such as Figure 3 As shown, in some embodiments, the bottoms of the first front seat leg lock 2222, the first rear seat leg lock 2223, the second front seat leg lock 2211, and the second rear seat leg lock 2212 all extend outward from both sides to form flanges 2225. These flanges 2225 are mainly used to connect the locks to the guide rail. Depending on the stress conditions, three flanges 2225 are provided on each front seat leg lock, so that the first front seat leg lock 2222 and the second front seat leg lock 2211 are connected to the guide rail by providing three flanges 2225. At the same time, four flanges 2225 are provided on each rear seat leg lock, so that the first rear seat leg lock 2223 and the second rear seat leg lock 2212 are connected to the guide rail by providing four flanges 2225. By adjusting the number of flanges 2225 on the lock body and the position of the connection points, the stress conditions of the flanges 2225 can be improved, so that the load on the flanges 2225 is not too large, which could damage the guide rail on the aircraft.

[0040] Furthermore, based on strength verification and preliminary test data, in some embodiments, the structure of the side plate 11 has been optimized. The connecting skeleton of the main body of the side plate 11 adopts a triangular rib stability structure. At the same time, according to the stress conditions of different parts, the thickness of the ribs and the depth of the groove are reasonably arranged to reduce the weight as much as possible while ensuring the strength requirements.

[0041] like Figure 5 , Figure 6As shown, in some embodiments, the observer seat with a cross-track installation also includes a seat plate assembly 3. The seat plate assembly 3 includes a spring 31, a fixing block 32, a seat basin tube 33, two hanging plates 34, two limiting blocks 35, and a bottom seat plate 36. The inner sides of the two side plates 11 are each provided with a seat basin rotation shaft 37. The seat basin tube 33 is connected between the two seat basin rotation shafts 37. The bottom seat plate 36 is rotatably connected to the seat basin tube 33 through a bushing. One end of the spring 31 is clamped on the bottom seat plate 36, and the other end is connected to the fixing block 32. The fixing block 32 is fixed to the seat basin tube 33 by screws, and the hanging plates 34 connect the seat basin rotation shaft 37 and the limiting blocks 35. The limiting blocks 35 are connected to the side plates 11, and the side plates 11 are provided with limiting grooves that cooperate with the limiting blocks 35, so that the limiting blocks 35 move according to a predetermined stroke. With this structural design, when the spring 31 is in its initial position, the bottom plate 36 is in a vertical position due to the torque of the spring 31. At this time, the bottom plate 36 is in a retracted state. When in use, a force can be applied to the bottom plate 36 to rotate it to near horizontal and hold it there. At this time, the bottom plate 36 is in a usable state. When the bottom plate 36 is in the usable state, because it has rotated downward by a set angle relative to the retracted state, it will drive the end of the spring 31 connected to it to rotate, so that the spring 31 is in a stretched state. Therefore, when the applied force is removed, the bottom plate 36 can automatically reset and retract.

[0042] To minimize the space occupied by the protruding bottom seat plate 36 when the seat is retracted, a movable backrest is provided at the retracted position of the seat plate. Figure 1 , Figure 7As shown, in some embodiments, the cross-track mounted observer seat also includes a backrest assembly 4, which includes a first backrest 41 and a second backrest 42. The first backrest 41 and the second backrest 42 are sequentially positioned above the connection point of the bottom seat plate 36. The second backrest 42 is fixed. Two limiting blocks 35 are respectively connected to the bottom two sides of the first backrest 41. Rollers 43 are provided on both sides of the top of the first backrest 41. Guide grooves 44 are provided on the side plate 11 at positions corresponding to the rollers 43. The guide grooves 44 extend upwards from one side near the front of the seat to the other side at an angle. Limiting grooves identical to the guide grooves 44 are provided on the side plate 11 at positions corresponding to the limiting blocks 35. When the seat rotates and drives the first backrest 41 to move, the movement trajectory of the upper and lower linkage shafts of the first backrest 41 will follow a preset trajectory, thereby ensuring smooth movement and seating comfort. The guide grooves 44 mainly serve to constrain the backrest assembly 4, ensuring that it moves along the trajectory of the guide grooves 44 when linked with the seat plate. This design enables the backrest to provide forward seating support and retract backward when folded up, creating storage space for the seat panel. When the bottom seat panel 36 rotates upward to reset, it causes the limiting block 35 to move backward and upward, which in turn causes the roller 43 to roll inward into the guide groove 44, pushing the first backrest 41 into the seat frame, where it is folded up.

[0043] The linkage between the seat and backrest is a crucial function of a seat, enhancing occupant comfort and directly impacting its normal operation. In the previous generation of seat linkage mechanisms, the backrest moved via a fixed rotating shaft. At the initial 0-degree limit position, it was prone to rotating backward, causing the linkage mechanism to jam and malfunction. This new seat design, based on the backrest's movement trajectory and the shape of the side panel 11, adds a guide groove 44 for backrest movement to the side panel 11. Simultaneously, rollers 43 are added to both ends of the backrest frame, with the rollers 43 confined within the guide groove 44. This enables backrest movement within the seat-back linkage mechanism, resolving the backrest jamming problem and simplifying the movement mechanism.

[0044] Specifically, in this embodiment, the number of springs 31 is not limited, and multiple springs can be set according to actual usage requirements.

[0045] like Figure 1 , Figure 2 , Figure 8 , Figure 9As shown, in some embodiments, the frame assembly 1 further includes a bottom plate and a top plate 12 disposed between the bottoms of the two side plates 11. The top plate 12 is disposed at a position corresponding to the seat. A storage space is also formed between the bottoms of the two side plates 11. The cross-track installed observer seat also includes a storage box assembly 5. The storage box assembly 5 includes a storage box door 51, a life jacket box 52, a door lock 53, and a fastener 54. The storage box door 51 is disposed between one side of the two side plates 11, and the bottom end of the storage box door 51 is rotatably connected to the bottom plate. The door lock 53 is disposed on one side of its top end. The door lock 53 is locked in cooperation with a pin 13 disposed on the top plate 12. The storage box door 51 is also provided with a life jacket box 52 and the fastener 54. The storage compartment door 51 can be locked by a door lock 53 and a pin 13 that engages with the seat frame. Pulling the pull strap on the door lock 53 outwards opens the storage compartment door 51, and pushing the storage compartment door 51 upwards engages the pin 13 with the door lock 53 to lock it in place. One end of the storage compartment door 51 is connected to the left side panel 11 via a threaded fastener 54, and the other end is connected to an interface extending from the seat tube via a fastener 54. The fastener 54 on the storage compartment door 51 engages with the interface limiting surface on the seat tube, providing a limiting function when the door is open. This keeps the storage compartment door 51 at approximately 53° when open, preventing it from falling to the ground without cushioning. To prevent interference between the life jacket box 52 and the seat tube 211, the life jacket box 52 is placed in the gaps between several of the frame connecting parts 21 and the frame assembly 1.

[0046] Specifically, the bottom seat plate 36 is machined from aerospace-grade aluminum alloy, with reinforcing ribs and a headrest 6. The front of the seat plate has a groin strap interface (7), and the side panels 34 have lap belt interfaces (7). The lap belts 7 are five-point harnesses, formed by five connecting straps linking the frame, allowing the pilot to withstand overload during flight and emergency landings. Through topology optimization, the structure and position of the seat plate ribs are rationally arranged (ribs on both sides and front and rear). Compared to traditional seat plate structures, the seat plate thickness is reduced while maintaining strength, allowing for better deformation and energy absorption, thus reducing lumbar load. Simultaneously, the seat cushion 38 on the bottom seat plate 36 uses a polyethylene and polyurethane splicing structure, further reducing lumbar load while ensuring comfort.

[0047] The present invention provides a method for arranging a plurality of frame connecting portions 21 in the gap formed between two side plates 11, thereby facilitating the arrangement of a guide rail connecting portion 22 connected to an aircraft guide rail between the two side plates 11. Each guide rail connecting portion 22 includes a first connecting portion 221 and a second connecting portion 222, which are respectively connected to one of the seat tubes 211 of each frame connecting portion 21, thus stably connecting the guide rail connecting portion 22, the frame connecting portion 21, and the side plate 11 together. Furthermore, the first connecting portion 221 and the second connecting portion 222 are respectively connected to... When the floor deforms, the energy generated at the first connection 221 and the second connection 222 will act on the different chair tubes 211 in the frame connection 21 under the condition of unbalanced force on the two guide rails. The two chair tubes 211 are sleeved together, and one connection can rotate relative to multiple chair tubes 211, so that it can achieve hard deformation with the connected chair tubes 211, thereby effectively absorbing impact energy. The structure is reliable and meets the airworthiness verification requirements for seat structural strength and structural deformation.

[0048] In the description of this application, it should be noted that the terms "upper" and "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0049] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0050] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A cross-track mounted observer seat, characterized in that, include: A frame assembly, the frame assembly including two side panels respectively arranged side by side on both sides of the seat; and, A floor connection assembly, comprising several frame connection parts and guide rail connection parts. A plurality of the frame connecting parts are disposed in the gap formed between the two side plates, and each frame connecting part includes at least two sleeved chair tubes, wherein the ends of at least two chair tubes are respectively connected to the two side plates; The guide rail connection includes a first connection and a second connection. The first connection and the second connection are spaced apart and respectively connected to guide rails for mounting seats. The first connection and the second connection are respectively connected to one of the chair tubes of each of the frame connection and respectively connected to two different chair tubes in the frame connection, so that when the floor deforms, it acts on different chair tubes in the frame connection, and one of the connection parts can rotate relative to several chair tubes.

2. The observer seat with a cross-track installation according to claim 1, characterized in that, The first connecting part is connected to one of the side plates, and the second connecting part is spaced between the first connecting part and the other side plate. The diameter of each chair tube in each of the frame connecting parts is different, wherein the diameter of the chair tube connected to the second connecting part is larger than the diameter of the chair tube connected to the first connecting part.

3. The observer seat with a cross-track installation according to claim 1, characterized in that, The second connecting part includes a middle chair leg, a first front chair leg lock, and a first rear chair leg lock. Each of the middle chair legs has a mounting hole at a position corresponding to the chair tube, so as to be connected to each of the chair tubes through the mounting holes; The first front seat leg lock and the first rear seat leg lock are respectively located at the bottom ends of the middle seat leg, and are used to connect one of the guide rails used to install the seat.

4. The observer seat with a cross-track installation according to claim 3, characterized in that, The diameter of the mounting hole gradually increases from one side to the other, and the position with the smallest diameter forms a connection point that connects to the chair tube. The connection point is far away from the area where pitch deformation occurs.

5. The observer seat with a cross-track installation according to claim 3, characterized in that, The first connecting part includes a second front seat leg lock and a second rear seat leg lock. The second front seat leg lock and the second rear seat leg lock are arranged side by side on the inner side of one of the side panels. They are both connected to the connecting frame on the inner side of the side panel and are used to connect to another guide rail for mounting the seat. Both side panels are connected to the chair tube of the frame connecting part through the connecting frame provided on their inner side.

6. The observer seat with a cross-track installation according to claim 5, characterized in that, The bottom of the first front seat leg lock, the first rear seat leg lock, the second front seat leg lock, and the second rear seat leg lock all extend outward from both sides to form flanges. The first front seat leg lock and the second front seat leg lock are connected to the guide rail by providing three of the flanges, and the first rear seat leg lock and the second rear seat leg lock are connected to the guide rail by providing four of the flanges.

7. The observer seat with a cross-track installation according to claim 3, characterized in that, A fixing bolt is provided on the middle chair leg at the position corresponding to the chair tube, so that the chair tube can be fixedly connected to the middle chair leg through the fixing bolt. The hole on the chair tube that is connected to the fixing bolt is an oblong hole.

8. The observer seat with a cross-track installation according to claim 1, characterized in that, The cross-rail mounted observer seat also includes a seat assembly, which comprises a spring, a fixing block, a seat tube, two hanging plates, two limiting blocks, and a bottom seat plate. The inner sides of both side panels are provided with a basin rotation shaft, and the basin tube is connected between the two basin rotation shafts. The bottom seat plate is rotatably connected to the basin tube through a bushing. One end of the spring is stuck on the bottom seat plate, and the other end is connected to a fixing block. The fixing block is fixed to the basin tube by screws, and the basin rotation shaft and the limiting block are connected by the hanging plate. The limiting block is connected to the side panel.

9. The observer seat with a cross-track installation according to claim 8, characterized in that, A backrest is rotatably connected between the two limiting blocks. Rollers are provided on both sides of the top of the backrest. Guide grooves are provided on the side plates at positions corresponding to the rollers. The guide grooves extend upward from one side near the front of the seat to the other side.

10. The observer seat with a cross-track installation according to claim 1, characterized in that, The frame assembly also includes a bottom plate and a top plate disposed between the bottoms of the two side plates. The top plate is positioned corresponding to the seat, and a storage space is formed between the bottoms of the two side plates. The observer seat, which is installed across the rails, also includes a storage box assembly. The storage box assembly includes a storage box door, a life jacket box, a door lock, and a fastener. The storage box door is located between one side of the two side panels, and the bottom end of the storage box door is rotatably connected to the base plate. The door lock is provided on one side of its top, and the door lock is locked in place with a pin provided on the top plate. The storage box door also includes a life jacket box and the fastener. When stored, the life jacket box is placed in the gap between several frame connecting parts and the frame assembly. The fastener is connected to an interface extending from the chair tube.

Images