HIC energy absorption structure and aero seat

Abstract

The invention discloses an HIC energy absorption structure and an aero seat, the HIC energy absorption structure comprises a seat back, an energy absorption support and a roll-over stand, the energy absorption support is mounted on the seat back, one end of the roll-over stand is pivoted to the seat back, the other end of the roll-over stand is lapped to the energy absorption support, and the energy absorption support can deform to absorb kinetic energy when the roll-over stand is impacted. According to the embodiment, in the forced landing process of the airplane, the airplane can be rapidly decelerated, a passenger inclines forwards under the action of inertia, at the moment, the head of the passenger collides with the turnover frame, then the turnover frame is forced to turn over, and the energy absorption support can deform to absorb kinetic energy when the turnover frame is collided. Kinetic energy generated by collision of the head of the passenger is absorbed by the deformed energy absorption support, so that impact on the head of the passenger is reduced. According to the HIC energy absorption structure, buffering can be provided through the overturning frame and the energy absorption support in a narrow space, and the safety of passengers is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of seats, and in particular to a HIC energy absorption structure and an aviation seat. Background Art

[0002] In the aviation field, HIC (Head Injury Criterion) is also used to assess the risk of head injuries to passengers in aircraft collisions, especially in situations such as crashes or emergency landings.

[0003] The existing aircraft seat with head buffering and anti-collision function can refer to the patent application number CN201911252814.3, which discloses an aircraft seat with head buffering and anti-collision function, including a seat cushion, a backrest is provided on one side of the top of the seat cushion, armrests are provided in the middle of both sides of the backrest, a headrest is provided on the top of the backrest, the headrest includes a headrest body, headrest side wings are provided on both sides of the headrest body, the headrest body and the headrest side wings on both sides are movably connected by bolts, a support frame is provided in the headrest side wing, a buffer is provided between the headrest side wing and the support frame, a buffer is provided in the middle of the opposite side of the headrest side wings on both sides, a fastener and a connector are provided at the bottom of the opposite side of the headrest side wings on both sides, a vertical groove and a horizontal groove are provided in the fastener, and the horizontal groove is located at the lower right of the vertical groove, and a spring gasket is provided at the bottom of the vertical groove. The buffer zone can effectively prevent the passenger's head from colliding with other objects due to forward tilt. However, the above-mentioned aircraft seats have the following disadvantages: on the one hand, the above-mentioned seats greatly restrict the personal freedom of passengers, which will greatly affect the passengers' riding experience in non-emergency situations. On the other hand, the head protection structure of the above-mentioned aircraft seats is complex and difficult to install in the economy class aircraft seats with limited space.

[0004] Therefore, how to utilize the limited backrest structure to cushion and protect the passenger's head in an emergency is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and propose a HIC energy absorption structure to solve the technical problem of the lack of installation space for the buffer structure on the seat back of the economy class in the prior art.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a HIC energy absorbing structure, comprising: Chair back; an energy absorbing bracket mounted on the seat back; and A tilt frame, one end of which is pivotally connected to the chair back and the other end of which is overlapped with the energy absorbing bracket; Wherein, the energy absorbing bracket can be deformed to absorb kinetic energy when the flip frame is hit.

[0007] In some embodiments, the energy absorbing bracket includes a first base, a second base and a deformation plate, the first base and the second base are both mounted on the chair back, and one end of the flip frame away from its pivot end is overlapped with the deformation plate.

[0008] In some embodiments, the deformable plate has at least one bending portion.

[0009] In some embodiments, the deformable plate is provided with a plurality of hollow holes.

[0010] In some embodiments, the HIC energy absorption structure also includes a base frame, a connecting member, a seat plate and a first elastic member. The chair back is rotatably mounted on the base frame. Both ends of the connecting member are respectively connected to the chair back and the seat plate. Both ends of the first elastic member are respectively connected to the connecting member and the chair back. The first elastic member has an elastic force that prevents the connecting member from rotating relative to the chair back.

[0011] In some embodiments, the connecting member includes a connecting plate, which is rotatably mounted on the base frame, and the connecting plate is provided with an arc-shaped groove surrounding its rotation center. The first elastic member includes a shear plate, and the shear plate is mounted on the connecting plate. The chair back has a limit pin and a shear pin, and the limit pin is slidably set in the arc-shaped groove. The limit pin presses against the shear plate, and the shear plate can be deformed under the pressure of the limit pin.

[0012] In some embodiments, the connecting plate is provided with a card slot, the shearing piece is provided with a receiving slot, and the shearing pin is embedded in the receiving slot.

[0013] In some embodiments, the HIC energy absorbing structure further includes a damping member, two ends of which press against the flip frame respectively, and the damping member has a friction force that prevents the flip frame from rotating relative to the chair back.

[0014] In some embodiments, the flip frame is provided with a friction hole, and the damping member includes a damping rod, which is passed through the friction hole. The damping rod rubs against the inner wall of the friction hole to prevent the flip frame from rotating relative to the chair back.

[0015] In a second aspect, the present invention further provides an aviation seat, which includes the above-mentioned HIC energy absorption structure.

[0016] During an emergency landing, the aircraft will decelerate rapidly, and the passenger will lean forward under the action of inertia. At this time, the passenger's head will hit the flip frame, forcing the flip frame to flip. The energy-absorbing bracket can deform to absorb kinetic energy when the flip frame is hit. Since the kinetic energy of the passenger's head impact is absorbed by the deformed energy-absorbing bracket, the impact on the passenger's head is reduced. The above HIC energy-absorbing structure can use the flip frame and the energy-absorbing bracket to provide buffering in a small space, thereby improving the safety of passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a HIC energy absorption structure provided by an embodiment of the present invention; Figure 2 is a schematic structural diagram of a connecting member and a first elastic member provided in an embodiment of the present invention; Figure 3 is a schematic diagram of the structure of an energy absorbing bracket provided in an embodiment of the present invention; Figure 4 is a schematic diagram of the structure of a damping member provided by an embodiment of the present invention; Figure 5 is a schematic diagram of the structure of a locking member provided by an embodiment of the present invention; Explanation of the accompanying drawings: chair back 100, limit pin 110, shear pin 120, energy absorbing bracket 200, first base 210, second base 220, deformation plate 230, bending portion 231, hollow hole 232, flip frame 300, friction hole 310, base frame 400, connecting member 500, connecting plate 510, slot 511, arc slot 520, first elastic member 600, shear piece 610, storage slot 611, seat plate 700, damping member 800, damping rod 810, locking member 900, female seat 910, plug 920. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] In order to solve the technical problem of lack of installation space for a buffer structure on the seat back 100 of the economy class, the present invention provides a HIC energy absorbing structure, which can provide buffering in a small space using a flip frame 300 and an energy absorbing bracket 200 to improve the safety of passengers.

[0020] It should be noted that the HIC energy absorbing structure described in the present invention is used for but not limited to aviation seats, etc. For the convenience of explanation, in the present invention, only the application of the HIC energy absorbing structure to aviation seats is used as an example for explanation, and the principles of applying the HIC energy absorbing structure to other types of equipment are essentially the same as those applied to aviation seats, and will not be elaborated here.

[0021] See also Figure 1 , Figure 1 Schematic diagram of the structure of the HIC energy absorbing structure in one embodiment of the present invention. The HIC energy absorbing structure includes a chair back 100, an energy absorbing bracket 200 and a flip frame 300. The energy absorbing bracket 200 is installed on the chair back 100. One end of the flip frame 300 is pivotally connected to the chair back 100, and the other end thereof is overlapped with the energy absorbing bracket 200. The energy absorbing bracket 200 can be deformed to absorb kinetic energy when the flip frame 300 is hit.

[0022] In this embodiment, during the forced landing of the aircraft, the aircraft will decelerate rapidly, and the passenger will lean forward under the action of inertia. At this time, the passenger's head will hit the flip frame 300, thereby forcing the flip frame 300 to flip. The energy absorbing bracket 200 can deform to absorb kinetic energy when the flip frame 300 is hit. Since the kinetic energy of the passenger's head impact is absorbed by the deformed energy absorbing bracket 200, the impact on the passenger's head is reduced. The above-mentioned HIC energy absorbing structure can use the flip frame 300 and the energy absorbing bracket 200 to provide buffering in a narrow space, thereby improving the safety of passengers.

[0023] In some embodiments, the energy absorbing bracket 200 includes a first base 210, a second base 220 and a deformation plate 230. The first base 210 and the second base 220 are both mounted on the chair back 100, and one end of the flip frame 300 away from its pivot end is overlapped on the deformation plate 230. With the support of the first base 210 and the second base 220, the deformation plate 230 is suspended in the air, and the deformation plate 230 supports one end of the flip frame 300. When the flip frame 300 is hit by the passenger's head, the flip frame 300 flips toward the deformation plate 230, and the flip frame 300 hits the deformation plate 230, thereby forcing the deformation plate 230 to bend and deform. The bent deformation plate 230 can absorb kinetic energy, thereby playing a buffering role for the passenger's head and reducing the impact damage to the passenger's head.

[0024] It should be emphasized that the energy absorbing bracket 200 itself needs to have a certain rigidity, so that it can support and fix the rollover frame 300 under normal conditions. When the passenger's head hits the rollover frame 300 violently, the energy absorbing bracket 200 deforms to absorb the kinetic energy generated by the impact.

[0025] On the basis of the above embodiments, in one of the embodiments, the deformation plate 230 has at least one bending portion 231. Since the deformation plate 230 has the bending portion 231, when the deformation plate 230 is hit, the bending portion 231 can be extended to a certain extent, thereby increasing the deformation space of the deformation plate 230, thereby increasing the flip angle of the deformation plate 230 forced to deform by the flip frame 300, so that the passenger can obtain a longer buffer distance after the head hits the flip frame 300, so that the passenger's head can obtain a better and ideal buffering effect.

[0026] It is understandable that the bending portion 231 can be one or more. If multiple bending portions 231 are provided, the multiple bending portions 231 can be arranged along the length direction or width direction of the deformation plate 230, and the multiple bending portions 231 can be disassembled and used at the same time, so that the overall extensibility of the deformation plate 230 can be expanded. In addition, the specific structure is also diverse, and the bending portion 231 can be an arc structure, a step structure, or a wave structure, as long as the bending portion 231 can be extended after the deformation plate 230 is hit.

[0027] It should be emphasized that in this application Figure 1 In the figure, the first base 210 is located at a higher position, the second base 220 is located at a lower position, and the deformation plate 230 mounted on the first base 210 and the second base 220 is arranged in a vertical direction, but this arrangement of the deformation plate 230 is not the only one. The first base 210 and the second base 220 can also be arranged at the same height, so that the deformation plate 230 mounted on the first base 210 and the second base 220 is arranged in a horizontal direction. Alternatively, it is also feasible to arrange the deformation plate 230 mounted on the first base 210 and the second base 220 in an inclined direction.

[0028] In some of the embodiments, the first base 210 is higher than the second base 220, and the first base 210 protrudes beyond the second base 220, so that the deformation plate 230 is set to tilt backward. When the passenger's head hits the flip frame 300, the flip frame 300 flips and forces the deformation plate 230 to deform. Under the joint guidance of the flip frame 300 and the deformation plate, the passenger's head can slide smoothly down the back of the backrest, reducing the head and neck injury value, and effectively protecting the life safety of the occupant.

[0029] Based on the above embodiments, in some of the embodiments, the back side of the seat back 100 is in an outwardly convex arc shape, and the flip frame 300 is installed at the high point of the seat back 100, while other accessories of the airline seat are installed at a lower position of the seat back 100. Since the back side of the seat back 100 is in an outwardly convex arc shape, the passenger's head can be effectively prevented from hitting other accessories of the airline seat when the passenger's head slides down the back of the backrest.

[0030] Based on the above embodiments, in some embodiments, the deformable plate 230 is provided with a plurality of hollow holes 232. The hollow holes 232 provided on the deformable plate 230 can reduce the weight of the deformable plate 230 on the one hand, and make the deformable plate 230 easier to bend and deform on the other hand.

[0031] The implementation of the energy absorbing bracket 200 is not unique, and the above implementation of the energy absorbing bracket 200 is only a preferred implementation. For example, the first base 210 and the second base 220 can be deformed. The energy absorbing bracket 200 can also use stacked metal corrugated plates to support the flip frame 300. When the flip frame 300 hits the stacked metal corrugated plates, the stacked metal corrugated plates can also deform and absorb kinetic energy.

[0032] In some of the embodiments, the HIC energy absorption structure also includes a base frame 400, a connecting member 500 and a first elastic member 600. The chair back 100 is rotatably mounted on the base frame 400. The two ends of the connecting member 500 are respectively connected to the chair back 100 and the seat plate 700. The two ends of the first elastic member 600 are respectively connected to the connecting member 500 and the chair back 100. The first elastic member 600 has an elastic force that prevents the connecting member 500 from rotating relative to the chair back 100.

[0033] It should be noted that the connecting member 500 is used to drive the connection between the chair back 100 and the seat plate 700, so that the chair back 100 and the seat plate 700 can be linked to each other. The linkage between the chair back 100 and the seat plate 700 is a common arrangement of economy class airline seats. After the passenger's head hits the flip frame 300, it will not only force the flip frame 300 to hit the energy absorbing bracket 200. It will also force the chair back 100 to flip forward. Since the first elastic member 600 has an elastic force that prevents the connecting member 500 from rotating relative to the chair back 100, the elastic force of the first elastic member 600 can prevent the chair back 100 from flipping forward, and then the kinetic energy of the flip frame 300 can be absorbed by the first elastic member 600, so that the passenger's head can also be cushioned, which plays a role in reducing the impact injury to the passenger's head.

[0034] On the basis of the above embodiments, in some embodiments, the connecting member 500 includes a connecting plate 510, which is rotatably mounted on the base frame 400, and the connecting plate 510 is provided with an arc groove 520 surrounding its rotation center, the first elastic member 600 includes a shearing piece 610, and the shearing piece 610 is mounted on the connecting plate 510, and the chair back 100 has a limit pin 110 and a shearing pin 120, the limit pin 110 is slidably arranged in the arc groove 520, the limit pin 110 presses the shearing piece 610, and the shearing piece 610 can be deformed under the pressure of the limit pin 110. When the chair back 100 flips forward, the limit pin 110 slides along the arc groove 520 until the limit pin 110 moves to the end of the arc groove 520. As the seat back 100 continues to rotate, the limit pin 110 can push the connecting plate 510 to rotate. The rotating connecting plate 510 will drive the shear piece 610 to rotate, so that the shear piece 610 presses against the limit pin 110. The shear piece 610 is deformed under the pressure of the pressing pin, and the kinetic energy caused by the passenger's head impact can be absorbed through the deformation of the shear piece 610.

[0035] Shear pins 120 and shear tabs 610 are intrinsically safe devices used to protect equipment or systems in overload conditions. They absorb energy or disconnect by shear failure, thereby preventing more serious damage. The advantages of shear pins 120 and shear tabs 610 are mainly reflected in simple structure, low cost, easy replacement, high reliability and wide applicability. Shear pins 120 are more suitable for small and medium loads and simple structures, while shear tabs 610 perform well in high torque and heavy load scenarios. Both are indispensable safety devices in engineering design and can effectively protect equipment from overload damage.

[0036] It is understandable that the shearing piece 610 can be installed at any position of the connecting plate 510 , as long as the connecting plate 510 can drive the shearing piece 610 to press against the shearing pin 120 during the rotation of the connecting plate 510 .

[0037] On the basis of the above embodiments, in some embodiments, the connecting plate 510 is provided with a card slot 511, the shearing piece 610 is provided with a receiving slot 611, and the shearing pin 120 is embedded in the receiving slot 611. Since the shearing piece 610 is fixed in the card slot 511, the shearing piece 610 can be effectively fixed. When the shearing piece 610 presses against the shearing pin 120, since the shearing pin 120 is embedded in the receiving slot 611, it is ensured that the shearing pin 120 can press against the shearing piece 610 to deform, and the shearing pin 120 is prevented from being separated from the shearing piece 610 during the rotation process.

[0038] It should be noted that the shearing piece 610 may be a metal shearing piece 610 , or a nylon shearing piece 610 or a plastic shearing piece 610 , as long as the shearing piece 610 itself has a certain rigidity and can be deformed under severe impact.

[0039] It can be understood that the flip frame 300 is usually used to be embedded in a specific display screen support frame, and can also be used to support a pad or mobile phone brought by the passenger. In some embodiments, a storage slot is opened at the bottom of the flip frame 300, and the passenger can place the pad or mobile phone brought by the passenger in the storage slot, so that the flip frame 300 can support the pad or mobile phone. Since the width of the storage slot is greater than the thickness of the pad or mobile phone, the pad or mobile phone can be placed at an angle in the storage slot.

[0040] On the basis of the above embodiments. In some of the embodiments, the HIC energy absorption structure further includes a damping member 800, the two ends of the damping member 800 respectively press against the flip frame 300, and the damping member 800 has a friction force that prevents the flip frame 300 from rotating relative to the seat back 100. Since the damping member 800 has a friction force that prevents the flip frame 300 from rotating relative to the seat back 100, when the flip frame 300 is hit by the passenger's head, the flip frame 300 rotates relative to the seat back 100, and the damping member 800 can absorb part of the kinetic energy generated by the impact, thereby playing a certain buffering role.

[0041] On the basis of the above embodiments, in some of the embodiments, the flip frame 300 is provided with a friction hole 310, and the damping member 800 includes a damping rod 810, one end of which is connected to the base, and the damping rod 810 is passed through the friction hole 310. When the flip frame 300 rotates, the damping rod 810 rotates relative to the friction hole 310, and when the damping rod 810 and the inner wall of the friction hole 310 rotate relative to each other, the damping rod 810 applies friction force to the inner wall of the friction hole 310, thereby hindering the flip frame 300 from rotating.

[0042] In some of the embodiments, the HIC energy absorbing structure further includes a locking member 900. The locking member 900 includes a female socket 910 and a plug 920. The female socket 910 is mounted on the deformation plate 230, and the plug 920 is mounted on the flip frame 300. When the locking member 900 is in the first state, the plug 920 is plugged into the female socket 910. When the locking member 900 is in the second state, the plug 320 is separated from the female socket 310. When the plug 320 is plugged into the female socket 310, the flip frame 300 can be fixed in the first position. When the plug 320 is separated from the female socket 310, the flip frame 300 can be allowed to be separated from the second position.

[0043] In a second aspect, the present invention further provides an aviation seat, which includes the above-mentioned HIC energy absorption structure.

[0044] In order to better understand the present invention, the following Figures 1 to 5 The technical solution of the present invention is described in detail: In the aviation field, HIC (Head Injury Criterion) is also used to assess the risk of head injuries to passengers in aircraft collisions, especially in situations such as crashes or emergency landings. The HIC energy absorption design of aircraft is similar to that of automobiles, but it needs to consider higher impact energy and more complex safety requirements. The pre-tensioned seat belt automatically tightens at the moment of collision, reducing the movement of the passenger's body, and can provide effective protection for passengers in emergencies. However, the space in the economy class of the aircraft is small. Even if the passenger is protected by the seat belt, the passenger's head will still hit the front seat back 100 under the action of inertia, causing great damage to the passenger's head. Due to the limitation of installation space, it is obviously impossible to install a complex energy absorption structure on the seat back 100 to reduce the impact force in a collision.

[0045] By using the HIC energy absorption structure of the present application, during the forced landing of the aircraft, the aircraft will decelerate rapidly, and the passenger will lean forward under the action of inertia. At this time, the passenger's head will hit the flip frame 300, thereby forcing the flip frame 300 to flip. Since the damping member 800 has a friction force that hinders the flip frame 300 from rotating relative to the seat back 100, when the flip frame 300 is hit by the passenger's head, the flip frame 300 rotates relative to the seat back 100, and the damping member 800 can absorb part of the kinetic energy generated by the impact, thereby playing a certain buffering role. Since the deformation plate 230 has a bending portion 231, when the deformation plate 230 is hit by the flip plate, the bending portion 231 can be extended to a certain extent, thereby increasing the deformation space of the deformation plate 230, thereby increasing the flip angle of the deformation plate 230 forced to deform by the flip frame 300, so that the passenger can obtain a longer buffer distance after the head hits the flip frame 300, so that the passenger's head can obtain a better and ideal buffering effect.

[0046] In addition, after the passenger's head hits the flip frame 300, it will not only force the flip frame 300 to hit the energy absorbing bracket 200, but also force the seat back 100 to flip forward. The limit pin 110 will slide along the arc groove 520 until the limit pin 110 moves to the end of the arc groove 520. As the seat back 100 continues to rotate, the limit pin 110 can push the connecting plate 510 to rotate, and the rotating connecting plate 510 will drive the shearing piece 610 to rotate, so that the shearing piece 610 presses against the limit pin 110, and the shearing piece 610 is deformed under the pressure of the pressing pin, and then the kinetic energy caused by the passenger's head impact can be absorbed through the deformation of the shearing piece 610. Since the kinetic energy of the passenger's head impact is absorbed, the impact on the passenger's head is reduced. The above-mentioned HIC energy absorbing structure can use the flip frame 300 and the energy absorbing bracket 200 to provide buffering in a narrow space, thereby improving the safety of passengers. The purpose of the present invention is to design a system energy absorption mechanism on the backrest of a long-range economy class seat to protect the head of the occupant during emergency landing of the aircraft and reduce the head injury value of the occupant to an acceptable range.

[0047] In the description of the present application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device 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 application. Unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0048] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0049] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A HIC energy absorbing structure, characterized in that: include: Chair back; an energy absorbing bracket mounted on the chair back; as well as A tilt frame, one end of which is pivotally connected to the chair back and the other end of which is overlapped with the energy absorbing bracket; Wherein, the energy absorbing bracket can plastically deform to absorb kinetic energy when the overturning frame is hit.

2. The HIC energy absorbing structure according to claim 1, characterized in that: The energy absorbing bracket comprises a first base, a second base and a deformation plate, the first base and the second base are both mounted on the chair back, and one end of the flip frame away from the pivot end thereof is overlapped on the deformation plate.

3. The HIC energy absorbing structure according to claim 2, characterized in that: The deformable plate has at least one bending portion.

4. The HIC energy absorbing structure according to claim 2, characterized in that: The deformation plate is provided with a plurality of hollow holes.

5. The HIC energy absorbing structure according to claim 1, characterized in that: The HIC energy absorption structure also includes a base frame, a connecting member, a seat plate and a first elastic member. The chair back is rotatably mounted on the base frame. Both ends of the connecting member are respectively connected to the chair back and the seat plate. Both ends of the first elastic member are respectively connected to the connecting member and the chair back. The first elastic member has an elastic force that prevents the connecting member from rotating relative to the chair back.

6. The HIC energy absorbing structure according to claim 5, characterized in that: The connecting member includes a connecting plate, which is rotatably mounted on the base frame and is provided with an arc-shaped groove surrounding its rotation center. The first elastic member includes a shear piece, which is mounted on the connecting plate. The chair back has a limit pin and a shear pin, which is slidably arranged in the arc-shaped groove. The limit pin presses against the shear piece, and the shear piece can be deformed under the pressure of the limit pin.

7. The HIC energy absorbing structure according to claim 6, characterized in that: The connecting plate is provided with a card slot, the shearing piece is provided with a receiving slot, and the shearing pin is embedded in the receiving slot.

8. The HIC energy absorbing structure according to claim 1, characterized in that: The HIC energy absorption structure further includes a damping member, two ends of which respectively press against the flip frame, and the damping member has a friction force that prevents the flip frame from rotating relative to the seat back.

9. The HIC energy absorbing structure according to claim 8, characterized in that: The flip frame is provided with a friction hole, and the damping member comprises a damping rod, which is passed through the friction hole. The damping rod rubs against the inner wall of the friction hole to prevent the flip frame from rotating relative to the chair back.

10. An aviation seat, characterized in that: It comprises the HIC energy absorbing structure as described in any one of claims 1 to 9.

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