Aero seat with backrest inertial collision protection function

Abstract

The invention discloses an aero seat with a backrest inertial collision protection function. The aero seat comprises a seat framework, a backrest, a protection assembly and a backrest angle adjusting mechanism. The lower end of the backrest is rotationally mounted on the seat framework; the protection assembly comprises a connecting plate and a shearing shaft, the middle of the connecting plate is rotationally installed on the backrest, the rotating axis of the connecting plate is coaxial with the rotating axis of the backrest, the connecting plate is provided with a through hole, the shearing shaft penetrates through the through hole to be connected with the backrest, and two shearing rings arranged at intervals are formed on the connecting plate on the rotating path of the shearing shaft so that when the backrest is subjected to forward external force, the shearing rings can shear the backrest. The shearing shaft shears off the two shearing rings in sequence; the backrest angle adjusting mechanism is arranged on the seat framework, and the driving end of the backrest angle adjusting mechanism is connected with the lower end of the connecting plate. The two shear rings arranged at intervals are arranged to form a two-stage trigger mechanism according to the time difference of the fact that the artificial hand and the head sequentially collide with the backrest, so that the head can avoid a dangerous area, and the protection effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of aviation passenger seats, and in particular to an aviation seat with backrest inertial collision protection. Background Art

[0002] When the aircraft makes an emergency landing and the seat occupant's head collides with the front seat back under inertia load, an occupant injury (HIC) collision test with 16g acceleration is required to evaluate the injury (head injury HIC value and neck injury NIJ value).

[0003] Patent CN110697052A discloses an off-axis rotating shear energy-absorbing aviation seat, comprising: a seat basin, side panels, a backrest, a connecting plate, a shear pin, a shear ring and a driving mechanism; the side panel is fixed to the left or right side of the seat basin; the lower end of the backrest is hinged to the rear side of the seat basin, and the hinge axis between the backrest and the seat basin is a first axis; the first end of the connecting plate is hinged to the side panel, the second end of the connecting plate is hinged to the backrest, and the third end of the connecting plate is provided with the shear ring, and the hinge axis between the first end of the connecting plate and the side panel is a second axis; when the backrest is tilted forward by a large inertia, the backrest rotates relative to the side panel with the first axis as the rotating axis, and during this process, the shear ring is torn open by the shear pin.

[0004] Under inertial impact, a person's hand will reach out and touch the backrest first, and then the head will touch the backrest. In the above-mentioned prior art, the backrest will usually trigger the shear pin to cut off the shear ring and rotate around the shaft only after the head collides. However, the backrest is generally integrated with a display, a backrest dining table, a knob and a PED bracket, etc. In HIC collision, it is often the case that the HIC value exceeds the standard due to the dummy's head colliding with one of the above-mentioned protruding parts, or the NIJ value exceeds the standard due to the neck hooking on a protruding feature. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and to propose an aviation seat with inertial collision protection for the backrest, so as to solve the problem that in the prior art the backrest usually triggers the shear pin to cut off the shear ring and rotate around the rotating shaft only after the head collides. However, the backrest is generally integrated with a display, a backrest dining table, a knob and a PED bracket, etc. In HIC collision, technical problems often occur, such as the HIC value exceeding the standard due to the dummy's head colliding with one of the above-mentioned protruding parts, or the NIJ value exceeding the standard due to the neck hooking on a protruding feature.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides an aviation seat with backrest inertial collision protection, comprising: Seat frame; A backrest, the lower end of which is rotatably mounted on the seat frame; A protection assembly, comprising a connecting plate and a shear shaft, wherein the middle portion of the connecting plate is rotatably mounted on the backrest and the rotation axis thereof is coaxial with the rotation axis of the backrest, the connecting plate is provided with a through hole, the shear shaft penetrates the through hole and is connected to the backrest, and the connecting plate is provided with two shear rings spaced apart on the rotation path of the shear shaft, so that when the backrest is subjected to a forward external force, the shear shaft sequentially shears off the two shear rings; and A backrest angle adjustment mechanism is arranged on the seat frame, and a driving end of the backrest angle adjustment mechanism is connected to the lower end of the connecting plate.

[0007] In some embodiments, two through holes are provided, and two shear axes are provided, and the two shear axes correspond one to one with the two through holes.

[0008] In some embodiments, the two through holes are located on opposite sides of the rotation axis of the connecting plate.

[0009] In some embodiments, the two through holes are located at the upper and lower sides of the rotation axis of the connecting plate, and correspondingly, the two shear axes are arranged at intervals along the length direction of the backrest.

[0010] In some embodiments, both of the shear rings are located in the rotation path of one of the shear shafts.

[0011] In some embodiments, the two shear rings are separately arranged on the rotation paths of the two shear shafts.

[0012] In some embodiments, the through hole is an arc-shaped hole, the center of which is coaxial with the rotation axis of the connecting plate, and buffer ribs are convexly formed on the opposite side walls of the arc-shaped hole so that when the backrest is subjected to a forward external force, the buffer ribs abut against the shear shaft to buffer the shear shaft.

[0013] In some embodiments, the two shear rings and the buffer web are arranged sequentially along the rotation path of the shear shaft.

[0014] In some embodiments, the buffer web includes a primary web and a secondary web, the primary web is located between the two shear rings, and the two shear rings and the secondary web are arranged in sequence along the rotation path of the shear axis.

[0015] In some embodiments, a shaft hole is provided in the middle of the connecting plate; The aviation seat with backrest inertial collision protection also includes a rotating shaft, which is adapted to the rotating shaft hole, and the rotating shaft passes through the rotating shaft hole and is fixedly connected to the backrest.

[0016] Compared with the prior art, the aviation seat with backrest inertial collision protection provided by the present invention has the following characteristics: the lower end of the backrest is rotatably mounted on the seat frame; the middle part of the connecting plate is rotatably mounted on the backrest and its rotation axis is coaxial with the rotation axis of the backrest; the connecting plate is provided with a through hole, the shear shaft passes through the through hole and is connected to the backrest, the connecting plate is formed with two shear rings arranged at intervals on the rotation path of the shear shaft, the backrest angle adjustment mechanism is provided on the seat frame, the driving end of the backrest angle adjustment mechanism is connected to the lower end of the connecting plate, the backrest angle adjustment mechanism is used to drive the backrest to rotate so as to adjust the angle of the backrest, and after the backrest rotates to a set position, the backrest is kept fixed, and when performing an HIC collision test, the dummy hand contacts the backrest, and at the inertia of the backrest Under the combined action of the inertial force of the backrest and the thrust of the dummy's head, the shear shaft shears the shear ring located in the front, so that the backrest and the shear shaft are released, and then the backrest rotates forward around the axis. When the shear shaft contacts the second shear ring, the backrest has already rotated a certain angle, and then the head contacts the backrest again. Under the combined action of the inertial force of the backrest and the thrust of the dummy's head, the shear shaft shears the second shear ring. After the shear shaft shears the first shear ring, the backrest rotates a certain angle. At this time, the display, backrest dining table, knob and PED bracket integrated on the back side of the backrest deviate from the trajectory of the head movement, thereby avoiding the head from contacting the above-mentioned dangerous area. At the same time, the two shear rings are used to reduce the risk and reduce the collision force, thereby protecting the occupant's head.

[0017] The present application utilizes the time difference between the dummy's hand and head colliding with the backrest in sequence, and sets two spaced-apart shear rings to form a two-stage trigger mechanism. The first-stage trigger utilizes the combined effect of the backrest inertia force and the dummy's hand thrust, and the second-stage trigger mainly utilizes the head collision force. After the first-stage trigger is maintained, the backrest rotates around the axis under the inertia force and the hand thrust. Before the second-stage trigger is maintained, the backrest has rotated a certain angle to avoid the collision danger zone and obtains a certain initial speed, so that the head can avoid the danger zone and play a protective role.

[0018] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail as follows with reference to the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment of an aviation seat with backrest inertial collision protection provided by the present invention; Figure 2 yes Figure 1 Left side view of the airline seat with inertial impact protection on the center backrest; Figure 3 yes Figure 2 A partial schematic diagram of an aviation seat with inertial collision protection for the center backrest; Figure 4 yes Figure 1 Left side view of an aviation seat with backrest inertial impact protection after the central shear axis shears one of the shear rings; Figure 5 yes Figure 4 A partial schematic diagram of an aviation seat with backrest inertial collision protection after the central shear axis shears one of the shear rings; Figure 6 yes Figure 1 Left view of an aviation seat with backrest inertial impact protection after the central shear axis shears two shear rings and crushes part of the belly plate; Figure 7 yes Figure 6 A partial schematic diagram of an aviation seat with backrest inertial collision protection after the central shear axis shears two shear rings and crushes part of the belly plate; Figure 8 yes Figure 1 A three-dimensional schematic diagram of the middle connecting plate; Fig. 9 yes Figure 8 The front view of the middle connecting plate; Fig.10 is a structural schematic diagram of another embodiment of the connecting plate provided by the present invention; Fig.11 yes Fig.10 The front view of the middle connecting plate; Fig.12 is a structural schematic diagram of another embodiment of the connecting plate provided by the present invention; Fig.13 yes Fig.12 Front view of the middle connecting plate.

[0020] Description of reference numerals: 1- Backrest, 2-connecting plate, 21-through hole, 22-shear ring, 23-buffer web, 231-primary web, 232-secondary web, 24-rotating shaft hole, 3- Shear axis, 4-Backrest angle adjustment mechanism, 5- Rotating axis. DETAILED DESCRIPTION

[0021] 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.

[0022] In order to solve the technical problem that in the prior art the shear pin of the backrest is usually triggered to cut off the shear ring and rotate around the shaft only after the head collides, while the backrest is generally integrated with a display, a backrest dining table, a knob and a PED bracket, etc., and in HIC collision, the HIC value exceeds the standard due to the dummy's head colliding with one of the above-mentioned protruding parts, or the NIJ value exceeds the standard due to the neck hooking on a protruding feature, the present invention provides an aviation seat with inertial collision protection of the backrest, which achieves the effect of reducing risks and reducing collision forces, thereby protecting the occupant's head.

[0023] See also Figure 1 , Figure 1 The figure is a schematic diagram of the structure of an aviation seat with backrest inertial collision protection in one embodiment of the present invention.

[0024] The present invention provides an aviation seat with backrest inertial collision protection, comprising a seat frame, a backrest 1, a protection component and a backrest angle adjustment mechanism 4; the lower end of the backrest 1 is rotatably mounted on the seat frame; the protection component comprises a connecting plate 2 and a shear shaft 3, the middle part of the connecting plate 2 is rotatably mounted on the backrest 1 and its rotation axis is coaxial with the rotation axis of the backrest 1, the connecting plate 2 is provided with a through hole 21, the shear shaft 3 penetrates the through hole 21 and is connected to the backrest 1, the connecting plate 2 is formed with two shear rings 22 arranged at intervals on the rotation path of the shear shaft 3, so that when the backrest 1 is subjected to a forward external force, the shear shaft 3 sequentially shears the two shear rings 22; and the backrest angle adjustment mechanism 4 is arranged on the seat frame, and the driving end of the backrest angle adjustment mechanism 4 is connected to the lower end of the connecting plate 2.

[0025] In this example, see Figure 2 , Figure 4 and Figure 6The lower end of the backrest 1 is rotatably mounted on the seat frame; the middle part of the connecting plate 2 is rotatably mounted on the backrest 1 and its rotation axis is coaxial with the rotation axis of the backrest 1. The connecting plate 2 is provided with a through hole 21, and the shear shaft 3 passes through the through hole 21 and is connected to the backrest 1. The connecting plate 2 is formed with two shear rings 22 arranged at intervals on the rotation path of the shear shaft 3. The backrest angle adjustment mechanism 4 is provided on the seat frame, and the driving end of the backrest angle adjustment mechanism 4 is connected to the lower end of the connecting plate 2. The backrest angle adjustment mechanism 4 is used to drive the backrest 1 to rotate to adjust the angle of the backrest 1, and keep the backrest 1 fixed after the backrest 1 rotates to the set position. When performing the HIC collision test, the dummy hand contacts the backrest 1, and under the combined action of the inertia force of the backrest 1 and the thrust of the dummy hand , the shear shaft 3 shears the shear ring 22 located in the front, so that the backrest 1 and the shear shaft 3 are released, and then the backrest 1 rotates forward around the axis. When the shear shaft 3 contacts the second shear ring 22, the backrest 1 has rotated a certain angle at this time, and then the head contacts the backrest 1 again. Under the joint action of the inertia force of the backrest 1 and the thrust of the dummy head, the shear shaft 3 shears the second shear ring 22. After the shear shaft 3 shears the first shear ring 22, the backrest 1 rotates a certain angle. At this time, the display integrated on the rear side of the backrest 1, the dining table of the backrest 1, the knob and the PED bracket deviate from the trajectory of the head movement, thereby avoiding the head from contacting the above-mentioned dangerous area. At the same time, the two shear rings 22 are used to reduce the risk and reduce the collision force, thereby protecting the occupant's head.

[0026] See also Figure 3 , Figure 5 and Figure 7 The present application utilizes the time difference between the dummy's hand and head colliding with the backrest 1 in sequence, and sets two spaced shear rings 22 to form a two-stage trigger mechanism. The first-stage trigger utilizes the combined effect of the inertia force of the backrest 1 and the thrust of the dummy's hand, and the second-stage trigger mainly utilizes the collision force of the head. After the first-stage trigger is maintained, the backrest 1 rotates around the rotating shaft 5 under the inertia force and the thrust of the hand. Before the second-stage trigger is maintained, the backrest 1 has rotated a certain angle to avoid the collision danger zone and obtains a certain initial speed, so that the head can avoid the danger zone, thereby playing a protective role.

[0027] The number of the through holes 21 and the shearing shafts 3 is not limited.

[0028] In one embodiment, see Fig.10 and Fig.11, the through hole 21 is provided with one, and correspondingly, the shear shaft 3 is provided with one, and the shear shaft 3 is arranged in the through hole 21. Since the shear shaft 3 is fixedly installed on the backrest 1, the shear shaft 3 can rotate with the backrest 1, and the shear shaft 3 is located in the through hole 21 on the connecting plate 2. In order to avoid interference with the rotation of the shear shaft 3, the structure of the through hole 21 is different when it is located at different positions on the connecting plate 2. When the through hole 21 is located in the middle of the connecting plate 2, in order to reserve the activity space of the shear shaft 3, the through hole 21 is arranged in an arc shape as a whole, and it coincides with the activity trajectory of the shear shaft 3. At this time, the shear shaft 3 can move in the through hole 21. Correspondingly, the two shear rings 22 are arranged horizontally on the through hole 21 in sequence, and one of the shear rings 22 is arranged close to one end of the through hole 21, so that the shear shaft 3 is initially limited by the shear ring 22 and the through hole 21; when the through hole 21 is located in the edge area of ​​the connecting plate 2, the shear shaft 3 can be rotated out of the through hole 21 after shearing the shear ring 22, so the through hole 21 does not need to reserve space for the movement of the shear shaft 3. At this time, the size of the through hole 21 is roughly equivalent to that of the shear shaft 3, and the part of the side wall of the through hole 21 facing outward can constitute one of the shear rings 22, and then the other shear ring 22 is located on the outside of the previous shear ring 22, and the shear shaft 3 can shear the two shear rings 22 in sequence when rotating out of the through hole 21.

[0029] In another embodiment, see Figure 8 , Fig. 9 , Fig.12 and Fig.13 There are two through holes 21 and two shear axes 3 , and the two shear axes 3 correspond to the two through holes 21 one by one.

[0030] Specifically, the two through holes 21 are arranged at intervals, the shear axis 3 corresponds to the through hole 21 one by one, and the shear axis 3 is located in the corresponding through hole 21. The specific form of the through hole 21 can be adjusted according to its setting position, and can be a round hole or an arc hole.

[0031] In one embodiment, see Figure 8 , Fig. 9 , Fig.12 and Fig.13 The two through holes 21 are located on opposite sides of the rotation axis of the connecting plate 2 .

[0032] In this embodiment, since the two through holes 21 are both opened on the connecting plate 2, in order to avoid the strength of the connecting plate 2 being too low, the two through holes 21 are located on two opposite sides of the rotation axis of the connecting plate 2. Such a setting can make the distance between the two through holes 21 farther, avoiding them being too concentrated, resulting in the strength of the connecting plate 2 being too low.

[0033] In one embodiment, see Figure 8 , Fig. 9 , Fig.12 and Fig.13 The two through holes 21 are located at the upper and lower sides of the rotation axis of the connecting plate 2 , and correspondingly, the two shear axes 3 are arranged at intervals along the length direction of the backrest 1 .

[0034] In this embodiment, since the backrest 1 is relatively long and its thickness is much smaller than its length, and the shear axis 3 is arranged on the side of the backrest 1, in order to facilitate assembly and appropriately increase the distance between the two through holes 21, the two shear axes 3 are arranged at intervals along the length direction of the backrest 1, and the two through holes 21 are located on the upper and lower sides of the rotation axis of the connecting plate 2. Such an arrangement is conducive to adapting to the backrest 1, and at the same time, the width of the connecting plate 2 can be reduced to be equivalent to the width of the connecting plate 2.

[0035] In the embodiment, for the convenience of explanation, the two through holes 21 include a first through hole and a second through hole, the first through hole is located below the rotation axis of the connecting plate 2, and the second through hole is located above the rotation axis of the connecting plate 2, the two shear rings 22 include a first shear ring and a second shear ring, the first shear ring and the second shear ring are arranged in sequence along the rotation direction of the shear shaft 3, the first through hole is located in the edge area of ​​the connecting plate 2, it is a circular hole and the diameter is adapted to the shear shaft 3, the second through hole is located in the middle of the connecting plate 2, it is an arc hole, the side wall of the outward part of the first through hole can constitute the first shear ring, so the second shear ring can only be located in the second through hole or on the outside of the first shear ring.

[0036] In one embodiment, see Fig.12 and Fig.13 , the two shear rings 22 are both located on the rotation path of one of the shear shafts 3 .

[0037] In this embodiment, part of the side wall of the first through hole constitutes the first shear ring, and the second shear ring is located outside the first shear ring. When the shear shaft 3 in the first through hole rotates, the first shear ring and the second shear ring can be sheared in sequence.

[0038] In another embodiment, see Figure 8 and Fig. 9 The two shear rings 22 are respectively arranged on the rotation paths of the two shear shafts 3.

[0039] Specifically, the shear axis 3 located in the first through hole is the first shear axis, and the shear axis 3 located in the second through hole is the second shear axis. When the second shear ring is located in the second through hole, the second shear ring is located in the middle position of the second through hole, so that the distance from the second shear ring to one end of the second circular hole is greater than the diameter of the second shear axis. In this way, the first shear ring is composed of part of the side wall of the first through hole. When conducting a test, the first shear axis first shears the first shear ring. At this time, the second shear axis is still some distance away from the second shear ring 22, so that the first shear ring and the second shear ring can be sheared in sequence.

[0040] In one embodiment, see Figures 8 to 13 The through hole 21 is an arc-shaped hole, the center of which is coaxial with the rotation axis of the connecting plate 2, and buffer webs 23 are convexly formed on opposite side walls of the arc-shaped hole, so that when the backrest 1 is subjected to a forward external force, the buffer webs 23 abut against the shear shaft 3 to buffer the shear shaft 3.

[0041] In this embodiment, in order to further improve the buffering effect, the through hole 21 is an arc-shaped hole, the center of the arc-shaped hole is coaxial with the rotation axis of the connecting plate 2, and the two opposite side walls in the arc-shaped hole are convexly provided with buffer webs 23, and the spacing between the buffer webs 23 on both sides is smaller than the diameter of the shear shaft 3. In this way, when the shear shaft 3 moves in the arc-shaped hole, the shear shaft 3 abuts against the buffer web 23, and the shear shaft 3 needs to crush the buffer web 23, thereby achieving a further buffering effect, which is beneficial to ensuring the safety of passengers.

[0042] In one embodiment, the two shear rings 22 and the buffer web 23 are arranged in sequence along the rotation path of the shear shaft 3 .

[0043] Specifically, see Fig.10 and Fig.11 When there is only one through hole 21 and it is an arc-shaped hole, the first shear ring, the second shear ring and the buffer web 23 are arranged in sequence along the rotation path of the shear shaft 3, that is, the shear shaft 3 shears the first shear ring and the second shear ring in sequence and then abuts against the buffer web 23.

[0044] See also Fig.12 and Fig.13When there are two through holes 21 and the two shear rings 22 are both located in the first through hole, the buffer web 23 is located in the second through hole, and after the first shear shaft shears the first shear ring, the second shear shaft abuts against the buffer web 23, and the first shear shaft shears the second shear ring and the second shear shaft crushes the buffer web 23 simultaneously.

[0045] In one embodiment, see Figure 8 and Fig. 9 The buffer web 23 includes a primary web 231 and a secondary web 232. The primary web 231 is located between the two shear rings 22. The two shear rings 22 and the secondary web 232 are arranged in sequence along the rotation path of the shear shaft 3. That is, the shear shaft 3 passes through one of the shear rings 22, the primary web 231, the other shear ring 22 and the secondary web 232 in sequence.

[0046] Specifically, when there are two through holes 21 and the second shear ring is located at the second through hole, the primary web 231, the second shear ring and the secondary web 232 are arranged in sequence, and after the first shear axis shears the first shear ring, the second shear axis abuts against the primary web 231, and after crushing the primary web 231, it abuts against the second shear ring, and after shearing the second shear ring, it abuts against the secondary web 232, and finally crushes the secondary web 232.

[0047] In one embodiment, a shaft hole 24 is provided in the middle of the connecting plate 2; the aviation seat with backrest inertial collision protection further comprises a shaft 5, the shaft 5 is adapted to the shaft hole 24, the shaft 5 is passed through the shaft hole 24 and fixedly connected to the backrest 1. Such a configuration facilitates installation and disassembly.

[0048] In this embodiment, the thickness of the connecting plate 2 is greater than the thickness of the shear ring 22 , and the thickness of the shear ring 22 is greater than the thickness of the buffer web 23 .

[0049] In this embodiment, the backrest angle adjustment mechanism 4 is a hydraulic lock. The hydraulic lock is a prior art and will not be described in detail.

[0050] In order to better understand the present invention, the following Figures 1 to 13 The technical solution of the present invention is described in detail: When performing the HIC collision test, the dummy's hand contacts the backrest 1. Under the combined action of the inertia force of the backrest 1 and the thrust of the dummy's hand, the shear shaft 3 shears a shear ring 22 located in the front, so that the backrest 1 and the shear shaft 3 are released. Then the backrest 1 rotates forward around the axis. When the shear shaft 3 contacts the second shear ring 22, the backrest 1 has already rotated a certain angle. Then the head contacts the backrest 1 again. Under the combined action of the inertia force of the backrest 1 and the thrust of the dummy's head, the shear shaft 3 shears the second shear ring 22. After the shear shaft 3 shears the first shear ring 22, the backrest 1 rotates a certain angle. At this time, the display and backrest integrated at the rear side of the backrest 1 are 1 The dining table, knob and PED bracket deviate from the trajectory of head movement, thereby avoiding the head from contacting the above-mentioned dangerous area. At the same time, the two shear rings 22 are used to reduce the risk and the collision force, thereby protecting the occupant's head. The time difference between the dummy's hand and head colliding with the backrest 1 is used to set two spaced shear rings 22 to form a two-stage trigger mechanism. The first-stage trigger uses the inertia force of the backrest 1 and the thrust of the dummy's hand. The second-stage trigger mainly uses the collision force of the head. After the first-stage trigger is maintained, the backrest 1 rotates around the rotating shaft 5 under the inertia force and the hand thrust. Before the second-stage trigger is maintained, the backrest 1 has rotated a certain angle to avoid the collision dangerous area and obtains a certain initial speed, so that the head can avoid the dangerous area and play a protective role.

[0051] 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. An aviation seat with backrest inertial collision protection, characterized in that: include: Seat frame; A backrest, the lower end of which is rotatably mounted on the seat frame; A protection assembly, comprising a connecting plate and a shear shaft, wherein the middle portion of the connecting plate is rotatably mounted on the backrest and the rotation axis thereof is coaxial with the rotation axis of the backrest, the connecting plate is provided with a through hole, the shear shaft penetrates the through hole and is connected to the backrest, and the connecting plate is provided with two shear rings spaced apart on the rotation path of the shear shaft, so that when the backrest is subjected to a forward external force, the shear shaft sequentially shears off the two shear rings; and A backrest angle adjustment mechanism is arranged on the seat frame, and a driving end of the backrest angle adjustment mechanism is connected to the lower end of the connecting plate.

2. The aviation seat with backrest inertial collision protection according to claim 1, characterized in that: There are two through holes, there are two shear axes, and the two shear axes correspond to the two through holes one by one.

3. The aviation seat with backrest inertial collision protection according to claim 2, characterized in that: The two through holes are located on two opposite sides of the rotation axis of the connecting plate.

4. The aviation seat with backrest inertial collision protection according to claim 3, characterized in that: The two through holes are located at the upper and lower sides of the rotation axis of the connecting plate, and correspondingly, the two shear axes are arranged at intervals along the length direction of the backrest.

5. The aviation seat with backrest inertial collision protection according to claim 2, characterized in that: The two shear rings are both located on the rotation path of one of the shear shafts.

6. The aviation seat with backrest inertial collision protection according to claim 2, characterized in that: The two shear rings are separately arranged on the rotation paths of the two shear shafts.

7. The aviation seat with backrest inertial collision protection according to claim 1, characterized in that: The through hole is an arc-shaped hole, the center of which is coaxial with the rotation axis of the connecting plate, and buffer webs are convexly formed on opposite side walls of the arc-shaped hole so that when the backrest is subjected to a forward external force, the buffer webs abut against the shear shaft to buffer the shear shaft.

8. The aviation seat with backrest inertial collision protection according to claim 7, characterized in that: The two shear rings and the buffer web are arranged in sequence along the rotation path of the shear shaft.

9. The aviation seat with backrest inertial collision protection according to claim 7, characterized in that: The buffer web comprises a primary web and a secondary web, the primary web is located between the two shear rings, and the two shear rings and the secondary web are arranged in sequence along the rotation path of the shear shaft.

10. The aviation seat with backrest inertial collision protection according to claim 1, characterized in that: A rotating shaft hole is provided in the middle of the connecting plate; The aviation seat with backrest inertial collision protection also includes a rotating shaft, which is adapted to the rotating shaft hole, and the rotating shaft passes through the rotating shaft hole and is fixedly connected to the backrest.

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