Locking type angle stepless adjustment aero seat

Abstract

The invention relates to the technical field of aviation equipment, in particular to a locking type angle stepless adjusting aero seat which comprises a seat framework, a backrest framework and an adjusting assembly, a backward leaning adjusting shaft is fixedly installed at the bottom of the backrest framework, and the adjusting assembly is fixedly arranged in the seat framework. When the rotation angle of the backrest framework is too large, the surface of the protective skin touches and extrudes the legs of a passenger in the back row, the L-shaped rocker arm and the hollow pipe are driven to rotate in the direction close to the backrest framework along the outer wall of the back leaning adjusting shaft, and the hollow pipe further drives the groove to rotate together during rotation; the elastic force of the top spring in a compressed force storage state is released, the hollow pipe and the two shifting forks are pushed to slide in the direction close to the ferry gear, the ferry gear is pushed along the outer wall of the back-leaning adjusting shaft, the ferry gear is meshed with the reverse gear, the backrest framework rotates forwards, and therefore extrusion on the legs of passengers in the back row is relieved; legs of back-row passengers are prevented from being injured.

Description

Technical Field

[0001] This invention relates to the field of aviation equipment technology, specifically to a locking type infinitely adjustable aircraft seat. Background Technology

[0002] Aircraft seats and their emergency life-saving equipment are key equipment for ensuring the safety of passengers and the comfort of travel during flight, and are also one of the most important airborne equipment in civil aircraft projects; According to a Chinese patent application with publication number 202510192812.9, an aircraft seat angle adjustment device is disclosed. This device involves extending the output end of a cylinder to move a slide forward along a groove, pulling steel wire ropes one and two to adjust the tilt angle of the backrest support. The slide pushes a push rod on the right side, causing support rods one and two to deflect, creating a slope in the soft padding of the seat cushion support that supports the passenger's buttocks. During the rotation of the rotating tube, two threaded collars move closer together, pushing the lumbar support plate forward, and the tilted ribs support the passenger's lower back, making the ride more comfortable. However, this aircraft seat does not provide adequate protection for the legs of rear passengers during adjustment. When the backrest angle of the front seat is adjusted significantly backward, there is a risk of squeezing the legs of rear passengers, which could lead to a poor experience or even injury. Therefore, we propose a locking-type stepless angle adjustment aircraft seat to solve the above-mentioned technical problems. Summary of the Invention

[0003] This invention provides the following technical solution: a locking type stepless angle adjustable aircraft seat, comprising: A seat frame and a backrest frame, wherein a reclining adjustment shaft is fixedly installed at the bottom of the backrest frame and the reclining adjustment shaft is rotatably installed inside the seat frame; An adjustment component, fixedly installed inside the seat frame, is used for adjusting the angle of the backrest frame. The adjustment component includes: U-shaped bearing housings are fixedly installed inside the seat frame; A hollow shaft is fixedly installed on two opposite surfaces of a U-shaped bearing housing; The swing gear is fitted onto the outer wall of the tilt adjustment shaft; Both the spur gear and the anti-spur gear are rotatably mounted on the outer wall of the hollow shaft, and they are of the same specification; A disc body is fixedly installed on the side of the spur gear away from the anti-gear, and a groove is formed on the outer wall of the disc body. The second disc body is fixedly installed on the side of the reverse gear away from the positive gear, and the outer wall of the second disc body has a groove of the same specification as the first groove. The tensioning shaft is rotatably mounted on one inner wall of the U-shaped bearing housing via a bearing. The tensioning wheel is fixedly installed on the outer wall of the tensioning shaft at the end away from the U-shaped bearing seat; The worm gear reducer motor is fixedly mounted on the end of the U-shaped bearing housing away from the tension wheel; The drive pulley is fixedly mounted on the output shaft of the worm gear reducer motor, and has the same specifications and center position as the tension pulley; The power belt is fitted between the first and second grooves and is wrapped around the periphery of the tension pulley and the drive pulley.

[0004] As a preferred embodiment of the present invention, the adjustment component further includes: The keyway is formed on the inner wall of the ferry gear; The key block is integrally formed and set on the outer wall of the tilt adjustment shaft, and its specifications and quantity are adapted to the keyway. The outer wall of the key block is slidably connected to the inner wall of the keyway.

[0005] As a preferred embodiment of the present invention, the adjustment component further includes: The push plate is fixedly installed on one side of the ferry gear and is concentric with the ferry gear; The push-pull groove is formed on the outer wall of the push-pull plate; The positioning block is fixedly installed on the outer wall of the tilt adjustment shaft; A hollow tube is rotatably mounted on the outer wall of the tilt adjustment shaft and located at the end of the positioning block away from the key block; Two shift forks are fixedly installed on the outer wall of the hollow tube near the end of the swing gear. The two shift forks are symmetrically distributed about the center of the hollow tube, and the ends of the two shift forks away from the hollow tube are slidably installed inside the push-shift groove.

[0006] As a preferred embodiment of the present invention, the adjustment component further includes: A groove is formed at the end of the hollow tube near the ferry gear; Two L-shaped rocker arms are fixedly installed on the outer wall of the hollow tube. The two hollow tubes are symmetrically distributed about the central axis of the hollow tube and extend to the back of the backrest frame. Top spring, sleeved around the rear tilt adjustment shaft; A spring top ring is fixedly installed on the outer wall of the tilt adjustment shaft at the end away from the key block, and the top spring is fixedly installed between the end of the hollow tube and the side of the L-shaped rocker arm. The safety plate is fixedly installed on the side of the two L-shaped rocker arms away from the backrest frame.

[0007] As a preferred embodiment of the present invention, the adjustment component further includes: The support arm is fixedly installed on the middle of one side of the U-shaped bearing seat near the hollow tube. A limiting rod is fixedly installed at the top of the support arm away from the U-shaped bearing seat, and the outer wall of the limiting rod abuts against the end of the hollow tube.

[0008] As a preferred embodiment of the present invention, the adjustment component further includes: Two spring lugs are fixedly installed on the upper end of the outer wall of the hollow tube, and the two spring lugs are symmetrically distributed about the central axis of the hollow tube. Two spring lugs are fixedly installed on the lower part of the bottom crossbeam of the backrest frame. The positions of the two spring lugs correspond to the positions of the two spring lugs. A crossbar is fixedly installed between the two spring lugs. Two tension springs are fixedly installed between the crossbar and the spring lug.

[0009] As a preferred embodiment of the present invention, the adjustment component further includes: The sliding cavity is located at one end of the tilt adjustment shaft; A rectangular groove is formed through the middle of the outer wall of the tilt adjustment shaft and extends through the interior of the sliding cavity; The reset push rod is slidably mounted inside the slide cavity; Two sliding pins are fixedly installed on the outer wall of the reset push rod near one end of the rectangular groove. The two sliding pins are symmetrically distributed about the center of the reset push rod, and the sliding pins slide through the interior of the rectangular groove. An annular groove is formed on the inner wall of the hollow tube, and the sliding pin is slidably installed inside the annular groove.

[0010] As a preferred embodiment of the present invention, a handle is fixedly installed at the end of the reset push rod away from the sliding pin.

[0011] As a preferred embodiment of the present invention, the backrest frame is externally fitted with a plastic decorative frame, the safety plate is located inside the plastic decorative frame, and a protective skin is fixedly installed on the back of the plastic decorative frame.

[0012] As a preferred embodiment of the present invention, a fixed seat is fixedly installed on the inner wall of the seat frame near the worm gear reducer motor, the U-shaped bearing seat is fixedly installed on the top of the fixed seat, and the worm gear reducer motor is fixedly installed on the side of the worm gear reducer motor by a fixed bracket.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, when the backrest frame rotates at an excessive angle, the protective skin surface touches and presses against the legs of the rear passenger. This causes the L-shaped rocker arm and hollow tube to rotate along the outer wall of the reclining adjustment shaft towards the backrest frame. During the rotation of the hollow tube, the groove also rotates. When the groove rotates and matches the position of the positioning block, the spring force of the top spring, which is in a compressed and stored state, is released, pushing the hollow tube and two shift forks to slide towards the swing gear. This pushes the swing gear along the outer wall of the reclining adjustment shaft, causing the swing gear to mesh with the anti-gear, resulting in the backrest frame rotating forward. This relieves the pressure on the legs of the rear passenger, preventing injury to their legs.

[0014] 2. In this invention, when the backrest frame angle is not adjusted backward, if the rear passenger deliberately presses their legs against the protective skin surface, thereby squeezing the safety plate and forcing the hollow tube to rotate, the backrest frame will rotate at a small angle, meaning the tilt adjustment shaft will also rotate at a small angle. In this case, the outer wall of the limiting rod will abut against the end of the hollow tube. Even if the hollow tube rotates to make the groove match the positioning block, the rebound force of the top spring will not be released, so it cannot push the hollow tube to move, nor will it disengage the swing gear from the spur gear, thus ensuring the backrest frame can be adjusted backward normally and forcing the rear passenger to remove their legs.

[0015] 3. In this invention, by manually pressing the handle, the reset push rod is pressed along the slide cavity towards the top ring of the spring, causing the reset push rod to slide along the inner wall of the slide cavity towards the reset push rod. This, in turn, drives the two sliding pins to slide synchronously along the inner walls of the two rectangular grooves. Since the outer walls of the two sliding pins are slidably connected to the inner walls of the ring grooves, the hollow tube is pushed towards the top ring of the spring under the sliding connection between the sliding pins and the ring grooves. The top spring is compressed again to store elastic force. The movement of the hollow tube drives the shift fork to move together, thereby shifting the swing gear back to mesh with the spur gear, realizing the normal adjustment of the backrest frame angle. At the same time, the hollow tube also drives the groove to move together. When the end of the hollow tube is flush with the end of the positioning block, the rebound force of the two tension springs in the stretched and stored state is released. The two spring lugs drive the hollow tube, L-shaped rocker arm, and safety plate to rotate and reset for the next use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the right front view structure of the present invention; Figure 2 This is a schematic diagram of the structure from the rear view of the present invention; Figure 3 This is a schematic diagram of the internal structure of the seat frame in this invention; Figure 4 In this invention Figure 3 A partial structural diagram; Figure 5 In this invention Figure 4 A magnified structural diagram of part A; Figure 6 This is a schematic diagram of the structure of the ferry gear and worm gear reducer motor in this invention; Figure 7 This is a schematic diagram of the spur gear and the anti-gear in this invention; Figure 8 This is a schematic diagram of the L-shaped rocker arm in this invention; Figure 9 In this invention Figure 8 A schematic diagram of the enlarged structure of part B; Figure 10 This is a schematic diagram of the unfolded structure of the reset push rod and the sliding cavity in this invention; Figure 11 This is a schematic diagram of the backrest frame in this invention; Figure 12 In this invention Figure 11 A magnified structural diagram of part C.

[0017] In the diagram: 100, Seat frame; 101, Fixed seat; 200, Backrest frame; 201, Reclining adjustment shaft; 300, Adjustment assembly; 301, U-shaped bearing seat; 302, Hollow shaft; 303, Swing gear; 304, Spur gear; 305, Disc body one; 306, Groove one; 307, Reverse gear; 308, Disc body two; 309, Groove two; 3010, Tensioning shaft; 3011, Tensioning pulley; 3012, Worm gear reducer motor; 3013, Drive pulley; 3014, Power belt; 3015, Keyway; 3016, Key block; 3017, Push-pull disc; 3018 3019. Push-pull groove; 3020. Positioning block; 3021. Hollow tube; 3022. Shift fork; 3023. Groove; 3024. L-shaped rocker arm; 3025. Top spring; 3026. Spring top ring; 3027. Safety plate; 3028. Support arm; 3029. Limiting rod; 3030. Spring lifting lug one; 3031. Spring lifting lug two; 3032. Crossbar; 3033. Tension spring; 3034. Sliding cavity; 3035. Reset push rod; 3036. Sliding pin; 3037. Ring groove; 3038. Handle; 500. Plastic decorative outer frame; 600. Protective skin. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-12The technical solution provided by the present invention specifically includes the following embodiments: A locking type angle-infinitely adjustable aviation seat includes a seat frame 100, a backrest frame 200, and an adjustment component 300. A reclining adjustment shaft 201 is fixedly installed at the bottom of the backrest frame 200 and is rotatably installed inside the seat frame 100. The adjustment component 300 is fixedly installed inside the seat frame 100 and is used for adjusting the angle of the backrest frame 200.

[0020] For further details, please refer to [link / reference]. Figure 5 , Figure 6 , Figure 7 As shown: The adjustment assembly 300 includes a U-shaped bearing housing 301, a hollow shaft 302, a swing gear 303, a spur gear 304, a first disc 305, a first groove 306, a reverse gear 307, a second disc 308, a second groove 309, a tensioning shaft 3010, a tensioning wheel 3011, a worm gear reducer motor 3012, a drive pulley 3013, a power belt 3014, a keyway 3015, and a key block 3016. The U-shaped bearing housing 301 is fixedly installed inside the seat frame 100, and the hollow shaft 302 is fixedly installed on two opposing surfaces of the U-shaped bearing housing 301. The swing gear 303 is sleeved on the outer wall of the tilt adjustment shaft 201. The spur gear 304 and the reverse gear 307 are both rotatably mounted on the outer wall of the hollow shaft 302 and are of the same specifications. A first disc 305 is fixedly mounted on the side of the spur gear 304 away from the reverse gear 307. A groove 306 is formed on the outer wall of the first disc 305. A second disc 308 is fixedly mounted on the side of the reverse gear 307 away from the spur gear 304. A groove 309 of the same specification as the groove 306 is formed on the outer wall of the second disc 308. The tensioning shaft 3010 rotates via bearings. The tensioning pulley 3011 is fixedly installed on the inner wall of the U-shaped bearing housing 301 at the end of the outer wall of the tensioning shaft 3010 away from the U-shaped bearing housing 301. The worm gear reducer motor 3012 is fixedly installed at the end of the U-shaped bearing housing 301 away from the tensioning pulley 3011. The drive pulley 3013 is fixedly installed on the output shaft of the worm gear reducer motor 3012, and has the same specifications and center position as the tensioning pulley 3011. The power belt 3014 is sleeved between the first groove 306 and the second groove 309, and is wound around the tensioning pulley 3011 and the drive pulley 3013. The keyway 3015 is formed on the inner wall of the swing gear 303. The key block 3016 is integrally formed on the outer wall of the tilt adjustment shaft 201, and its specifications and quantity are adapted to the keyway 3015. The outer wall of the key block 3016 is slidably connected to the inner wall of the keyway 3015. A fixed seat 101 is fixedly installed on the inner wall of the seat frame 100 near the worm gear reducer motor 3012. The U-shaped bearing seat 301 is fixedly installed on the top of the fixed seat 101. The worm gear reducer motor 3012 is fixedly installed on the side of the worm gear reducer motor 3012 through a fixed bracket.

[0021] Specifically, when the seat back frame 200 needs to be adjusted backward, the output shaft of the worm gear reducer motor 3012 drives the drive pulley 3013 to rotate. The rotation of the drive pulley 3013 drives the first disc 305 and the second disc 308 to rotate in opposite directions via the power belt 3014, causing the spur gear 304 and the anti-gear 307 to rotate in opposite directions. The rotation of the spur gear 304 drives the meshing swing gear 303 to rotate. The rotation of the swing gear 303 drives the tilt adjustment shaft 201 and the back frame 200 to rotate together under the torque limiting effect of the keyway 3015 and the key block 3016, realizing stepless adjustment of the aircraft seat angle. If the back frame 200 needs to be adjusted forward, simply control the output shaft of the worm gear reducer motor 3012 to rotate in opposite directions.

[0022] For further details, please refer to [link / reference]. Figure 3 , Figure 4 , Figure 6 , Figure 9 , Figure 10 , Figure 11 , Figure 12 As shown: The adjusting assembly 300 also includes a push plate 3017, a push groove 3018, a positioning block 3019, a hollow tube 3020, a shift fork 3021, a groove 3022, an L-shaped rocker arm 3023, a top spring 3024, a spring top ring 3025, and a safety plate 3026. The push plate 3017 is fixedly installed on one side of the ferry gear 303 and is concentric with the ferry gear 303. The push groove 3018 is formed on the outer wall of the push plate 3017, and the positioning block 3019 is fixedly installed on the outer wall of the push plate 3017. The hollow tube 3020 is rotatably mounted on the outer wall of the tilt adjustment shaft 201 and is located at the end of the positioning block 3019 away from the key block 3016. Two shift forks 3021 are fixedly mounted on the outer wall of the hollow tube 3020 near the swing gear 303. The two shift forks 3021 are symmetrically distributed about the center of the hollow tube 3020, and the ends of both shift forks 3021 away from the hollow tube 3021 are slidably mounted on the push... Inside the slot 3018, a groove 3022 is formed at one end of the hollow tube 3020 near the swing gear 303. Two L-shaped rocker arms 3023 are fixedly installed on the outer wall of the hollow tube 3020. The two hollow tubes 3020 are symmetrically distributed about the central axis of the hollow tube 3020 and extend to the back of the backrest frame 200. The top spring 3024 is sleeved around the backrest adjustment shaft 201, and the spring top ring 3025 is fixedly installed on the outer wall of the backrest adjustment shaft 201. At the end away from the key block 3016, the top spring 3024 is fixedly installed between the end of the hollow tube 3020 and the side of the L-shaped rocker arm 3023. The safety plate 3026 is fixedly installed on the side of the two L-shaped rocker arms 3023 away from the backrest frame 200. The backrest frame 200 is fixedly fitted with a plastic decorative frame 500. The safety plate 3026 is located inside the plastic decorative frame 500. The back of the plastic decorative frame 500 is fixedly installed with a protective skin 600.

[0023] Specifically, during the rearward adjustment of the backrest frame 200, the reclining adjustment shaft 201 also drives the hollow tube 3020, L-shaped rocker arm 3023, safety plate 3026, plastic decorative frame 500, and protective skin 600 to rotate together. When the backrest frame 200 rotates too much, the surface of the protective skin 600 first touches and presses against the rear passenger's legs. Then, the reaction force exerted on the protective skin 600 by the rear passenger's legs is transmitted to the back of the safety plate 3026, and through the L-shaped rocker arm 3023, the hollow tube 3020 rotates along the outer wall of the reclining adjustment shaft 201 towards the backrest frame 200. At the same time, the rotation of the hollow tube 3022 also drives the groove 3022 to rotate together. When the groove 3022 rotates and is stationary... After the position block 3019 is aligned, the spring 3024, which is in a compressed and stored state, is released, pushing the hollow tube 3020 and the two shift forks 3021 to slide closer to the swing gear 303. Since the ends of the two shift forks 3021 are slidably connected to the inner wall of the push groove 3018, the push plate 3017 and the swing gear 303 are pushed together along the outer wall of the rear tilt adjustment shaft 201, causing the swing gear 303 to separate from the positive gear 304 and then engage with the negative gear 307. Since the negative gear 307 and the positive gear 304 rotate in opposite directions, after the swing gear 303 and the negative gear 307 engage, the backrest frame 200 will rotate forward, thereby relieving the pressure on the legs of the rear passengers and preventing injury to the legs of the rear passengers.

[0024] For further details, please refer to [link / reference]. Figure 5 As shown: The adjustment assembly 300 also includes a support arm 3027 and a limiting rod 3028. The support arm 3027 is fixedly installed on the middle of one side of the U-shaped bearing seat 301 near the hollow tube 3020. The limiting rod 3028 is fixedly installed on the top end of the support arm 3027 away from the U-shaped bearing seat 301. The outer wall of the limiting rod 3028 abuts against the end of the hollow tube 3020.

[0025] Specifically, when the backrest frame 200 is adjusted backward by a small angle, if a rear passenger deliberately presses their leg against the protective cover 600, thereby squeezing the safety plate 3026 and forcing the hollow tube 3020 to rotate, the backrest frame 200 will rotate at a small angle, meaning the tilt adjustment shaft 201 will also rotate at a small angle. In this case, the outer wall of the limit rod 3028 will abut against the end of the hollow tube 3020. Even if the hollow tube 3020 rotates to make the groove 3022 match the positioning block 3019, the rebound force of the top spring 3024 will not be released. Therefore, the hollow tube 3020 cannot be moved, and the swing gear 303 will not disengage from the spur gear 304, thus ensuring the backrest frame 200 can be adjusted backward normally, forcing the rear passenger to move their leg away.

[0026] For further details, please refer to [link / reference]. Figure 9 , Figure 12 As shown: The adjustment assembly 300 also includes a first spring lug 3029, a second spring lug 3030, a crossbar 3031, and a tension spring 3032. The first spring lug 3029 is fixedly installed on the upper end of the outer wall of the hollow tube 3020, and there are two of them. The two first spring lugs 3029 are symmetrically distributed about the central axis of the hollow tube 3020. The second spring lug 3030 is fixedly installed on the lower part of the bottom crossbeam of the backrest frame 200, and there are two of them. The positions of the two second spring lugs 3030 correspond to the positions of the two first spring lugs 3029. The crossbar 3031 is fixedly installed between the two second spring lugs 3030. The tension spring 3032 is fixedly installed between the crossbar 3031 and the first spring lug 3029, and there are two of them.

[0027] Specifically, during the rearward adjustment of the backrest frame 200, the reclining adjustment shaft 201 also drives the hollow tube 3020, L-shaped rocker arm 3023, safety plate 3026, plastic decorative frame 500, and protective skin 600 to rotate together. When the backrest frame 200 rotates too much, the surface of the protective skin 600 first touches and presses against the legs of the rear passenger. Then, the reaction force exerted on the protective skin 600 by the legs of the rear passenger is transmitted to the back of the safety plate 3026. Through the L-shaped rocker arm 3023, the hollow tube 3020 rotates along the outer wall of the reclining adjustment shaft 201 towards the backrest frame 200. The rotation of the hollow tube 3020 also drives the two spring lugs 3029 to rotate together, causing the two tension springs 3032 to be stretched and accumulate elastic force.

[0028] For further details, please refer to [link / reference]. Figure 10 , Figure 12 As shown: The adjustment assembly 300 also includes a sliding cavity 3033, a rectangular groove 3034, a reset push rod 3035, a sliding pin 3036, an annular groove 3037, and a handle 3038. The sliding cavity 3033 is located at one end of the tilt adjustment shaft 201. The rectangular groove 3034 is formed through the middle of the outer wall of the tilt adjustment shaft 201 and extends through the interior of the sliding cavity 3033. The reset push rod 3035 is slidably installed inside the sliding cavity 3033, and the sliding pin 3036 is fixedly installed. Two sliding pins 3036 are symmetrically distributed about the center of the reset push rod 3035 at one end of the outer wall of the reset push rod 3035 near the rectangular groove 3034. The sliding pins 3036 slide through the interior of the rectangular groove 3034. An annular groove 3037 is formed on the inner wall of the hollow tube 3020. The sliding pins 3036 are slidably installed inside the annular groove 3037. A handle 3038 is fixedly installed at the end of the reset push rod 3035 away from the sliding pins 3036.

[0029] Specifically, when a reset is required, the flight attendant manually presses the handle 3038 to push the reset push rod 3035 along the slide cavity 3033 towards the spring top ring 3025. This causes the reset push rod 3035 to slide along the inner wall of the slide cavity 3033 towards the reset push rod 3035, which in turn drives the two sliding pins 3036 to slide synchronously along the inner walls of the two rectangular grooves 3034. Since the outer walls of the two sliding pins 3036 are slidably connected to the inner walls of the ring grooves 3037, the sliding connection between the sliding pins 3036 and the ring grooves 3037 pushes the hollow tube 3020 towards the spring top ring 3025. Spring 3024 is compressed again to store elastic force. The hollow tube 3020 moves, causing the shift fork 3021 to move as well, thereby shifting the swing gear 303 back to mesh with the spur gear 304, realizing the normal adjustment of the backrest frame angle 200. At the same time, the hollow tube 3020 also drives the groove 3022 to move as well. When the end of the hollow tube 3020 is flush with the end of the positioning block 3019, the rebound force of the two tension springs 3032 in the stretched and stored state is released. Through the two spring lugs 3029, the hollow tube 3020, L-shaped rocker arm 3023, and safety plate 3026 are rotated and reset for the next use.

[0030] In this solution, a locking-type stepless angle adjustable aviation seat operates such that when the backrest frame 200 needs to be adjusted backward, the output shaft of the worm gear reducer motor 3012 drives the drive pulley 3013 to rotate. The rotation of the drive pulley 3013 drives the first disc 305 and the second disc 308 to rotate in opposite directions via the power belt 3014, causing the spur gear 304 and the anti-gear 307 to rotate in opposite directions. The rotation of the spur gear 304 drives the meshing swing gear 303 to rotate. The rotation of the swing gear 303 drives the tilt adjustment shaft 201 and the backrest frame 200 to rotate together under the torque limiting effect of the keyway 3015 and the key block 3016, thus realizing stepless angle adjustment of the aviation seat. If the backrest frame 200 needs to be adjusted forward, it is only necessary to control the output shaft of the worm gear reducer motor 3012 to rotate in opposite directions. During the rearward adjustment of the backrest frame 200, the reclining adjustment shaft 201 also drives the hollow tube 3020, L-shaped rocker arm 3023, safety plate 3026, plastic decorative outer frame 500, and protective skin 600 to rotate together. When the backrest frame 200 rotates too much, the surface of the protective skin 600 first touches and presses against the rear passenger's legs. Then, the reaction force exerted on the protective skin 600 by the rear passenger's legs is transmitted to the back of the safety plate 3026, and through the L-shaped rocker arm 3023, it drives the hollow tube 3020 to rotate along the outer wall of the reclining adjustment shaft 201 towards the backrest frame 200. The rotation of the hollow tube 3020 also drives the two spring lugs 3029 to rotate together, causing the two tension springs 3032 to be stretched and store elastic force. At the same time, the rotation of the hollow tube 3020 also drives the concave... The groove 3022 rotates together. When the groove 3022 rotates and matches the position of the positioning block 3019, the spring force of the top spring 3024, which is in a compressed and stored state, is released, pushing the hollow tube 3020 and the two shift forks 3021 to slide towards the direction of the swing gear 303. Since the ends of the two shift forks 3021 are slidably connected to the inner wall of the push groove 3018, the push plate 3017 and the swing gear 303 are pushed together along the outer wall of the rear tilt adjustment shaft 201, so that the swing gear 303 separates from the positive gear 304 and then meshes with the negative gear 307. Since the negative gear 307 and the positive gear 304 rotate in opposite directions, after the swing gear 303 and the negative gear 307 mesh, the backrest frame 200 will rotate forward, thereby relieving the pressure on the legs of the rear passengers and preventing injury to the legs of the rear passengers. It is important to note that when the backrest frame 200 is adjusted backward at a small angle, if a rear passenger deliberately presses their legs against the protective cover 600, thereby squeezing the safety plate 3026 and forcing the hollow tube 3020 to rotate, the outer wall of the limit rod 3028 will contact the end of the hollow tube 3020. In this case, even if the hollow tube 3020 rotates and the groove 3022 matches the positioning block 3019, the rebound force of the top spring 3024 will not be released. Therefore, it will not be able to push the hollow tube 3020 to move, nor will it cause the swing gear 303 and the spur gear 304 to disengage, thus ensuring the backrest frame 200 can be adjusted backward normally and forcing the rear passenger to move their legs. When a reset is required, the flight attendant manually presses the handle 3038 to push the reset push rod 3035 along the slide cavity 3033 towards the spring top ring 3025. This causes the reset push rod 3035 to slide along the inner wall of the slide cavity 3033 towards the reset push rod 3035, which in turn drives the two sliding pins 3036 to slide synchronously along the inner walls of the two rectangular grooves 3034. Since the outer walls of the two sliding pins 3036 are slidably connected to the inner walls of the ring grooves 3037, the sliding connection between the sliding pins 3036 and the ring grooves 3037 pushes the hollow tube 3020 towards the spring top ring 3025, thus resetting the spring 3025. 024 is compressed again to store elastic force. The hollow tube 3020 moves, causing the shift fork 3021 to move as well, thereby shifting the swing gear 303 back to mesh with the spur gear 304, realizing the normal adjustment of the backrest frame angle 200. At the same time, the hollow tube 3020 also drives the groove 3022 to move together. When the end of the hollow tube 3020 is flush with the end of the positioning block 3019, the rebound force of the two tension springs 3032 in the stretched and stored state is released. Through the two spring lugs 3029, the hollow tube 3020, L-shaped rocker arm 3023, and safety plate 3026 are rotated and reset for the next use.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A locking type stepless angle adjustable aircraft seat, characterized in that: include: A seat frame (100) and a backrest frame (200) are provided. A reclining adjustment shaft (201) is fixedly installed at the bottom of the backrest frame (200). The reclining adjustment shaft (201) is rotatably installed inside the seat frame (100). An adjustment component (300) is fixedly disposed inside the seat frame (100). The adjustment component (300) is used for angle adjustment of the backrest frame (200). The adjustment component (300) includes: The U-shaped bearing seat (301) is fixedly installed inside the seat frame (100); A hollow shaft (302) is fixedly installed on two opposite surfaces of a U-shaped bearing housing (301); The swing gear (303) is sleeved on the outer wall of the rear tilt adjustment shaft (201); Both the spur gear (304) and the anti-gear (307) are rotatably mounted on the outer wall of the hollow shaft (302) and have the same specifications; The first disc body (305) is fixedly installed on the side of the spur gear (304) away from the anti gear (307), and a groove (306) is provided on the outer wall of the first disc body (305). The second disc (308) is fixedly installed on the side of the reverse gear (307) away from the spur gear (304). The outer wall of the second disc (308) has a second groove (309) with the same specifications as the first groove (306). The tensioning shaft (3010) is rotatably mounted on one inner wall of the U-shaped bearing housing (301) via a bearing; The tensioning wheel (3011) is fixedly installed on the outer wall of the tensioning shaft (3010) at the end away from the U-shaped bearing seat (301); The worm gear reducer motor (3012) is fixedly mounted on the end of the U-shaped bearing housing (301) away from the tensioner wheel (3011); The drive pulley (3013) is fixedly installed on the output shaft of the worm gear reducer motor (3012), and has the same specifications and center position as the tension pulley (3011); The power belt (3014) is fitted between the first groove (306) and the second groove (309) and is wrapped around the periphery of the tension pulley (3011) and the drive pulley (3013).

2. The locking type stepless angle adjustable aircraft seat according to claim 1, characterized in that: The adjustment assembly (300) further includes: A keyway (3015) is formed on the inner wall of the ferry gear (303); The key block (3016) is integrally formed and set on the outer wall of the tilt adjustment shaft (201), and its specifications and quantity are adapted to the keyway (3015). The outer wall of the key block (3016) is slidably connected to the inner wall of the keyway (3015).

3. A locking type stepless angle adjustable aircraft seat according to claim 2, characterized in that: The adjustment assembly (300) further includes: The push plate (3017) is fixedly installed on one side of the ferry gear (303) and is concentric with the ferry gear (303); A push-pull groove (3018) is formed on the outer wall of the push-pull plate (3017); The positioning block (3019) is fixedly installed on the outer wall of the tilt adjustment shaft (201); Hollow tube (3020) is rotatably mounted on the outer wall of the tilt adjustment shaft (201) and located at the end of the positioning block (3019) away from the key block (3016); Two shift forks (3021) are fixedly installed on the outer wall of the hollow tube (3020) near the end of the swing gear (303). The two shift forks (3021) are symmetrically distributed about the center of the hollow tube (3020), and the ends of the two shift forks (3021) away from the hollow tube (3020) are slidably installed inside the push groove (3018).

4. A locking type stepless angle adjustable aircraft seat according to claim 3, characterized in that: The adjustment assembly (300) further includes: A groove (3022) is formed at one end of the hollow tube (3020) near the ferry gear (303); L-shaped rocker arms (3023) are fixedly installed on the outer wall of hollow tubes (3020), and there are two of them. The two hollow tubes (3020) are symmetrically distributed about the central axis of the hollow tubes (3020) and extend to the back of the backrest frame (200). Top spring (3024) is sleeved around the rear tilt adjustment shaft (201); A spring top ring (3025) is fixedly installed on the outer wall of the tilt adjustment shaft (201) at the end away from the key block (3016), and the top spring (3024) is fixedly installed between the end of the hollow tube (3020) and the side of the L-shaped rocker arm (3023); The safety plate (3026) is fixedly installed on the side of the two L-shaped rocker arms (3023) away from the backrest frame (200).

5. A locking type stepless angle adjustable aircraft seat according to claim 4, characterized in that: The adjustment assembly (300) further includes: The support arm (3027) is fixedly installed on the middle of one side of the U-shaped bearing housing (301) near the hollow tube (3020); A limiting rod (3028) is fixedly installed on the top of the support arm (3027) away from the U-shaped bearing seat (301), and the outer wall of the limiting rod (3028) abuts against the end of the hollow tube (3020).

6. A locking type stepless angle adjustable aircraft seat according to claim 5, characterized in that: The adjustment assembly (300) further includes: Spring lug 1 (3029) is fixedly installed on the upper end of the outer wall of the hollow tube (3020), and there are two of them. The two spring lugs 1 (3029) are symmetrically distributed about the central axis of the hollow tube (3020). Two spring lugs (3030) are fixedly installed on the lower part of the bottom crossbeam of the backrest frame (200). The positions of the two spring lugs (3030) correspond to the positions of the two spring lugs (3029). A crossbar (3031) is fixedly installed between the two spring lugs (3030). Two tension springs (3032) are fixedly installed between the crossbar (3031) and the spring lug (3029).

7. A locking type stepless angle adjustable aircraft seat according to claim 6, characterized in that: The adjustment assembly (300) further includes: The sliding cavity (3033) is located at one end of the tilt adjustment shaft (201); A rectangular groove (3034) is formed through the middle of the outer wall of the tilt adjustment shaft (201) and also through the interior of the sliding cavity (3033); The reset push rod (3035) is slidably installed inside the slide cavity (3033); Two sliding pins (3036) are fixedly installed on the outer wall of the reset push rod (3035) near the rectangular groove (3034). The two sliding pins (3036) are symmetrically distributed about the center of the reset push rod (3035). The sliding pins (3036) slide through the interior of the rectangular groove (3034). An annular groove (3037) is formed on the inner wall of the hollow tube (3020), and the sliding pin (3036) is slidably installed inside the annular groove (3037).

8. A locking type stepless angle adjustable aircraft seat according to claim 7, characterized in that: A handle (3038) is fixedly installed at the end of the reset push rod (3035) away from the slide pin (3036).

9. A locking type stepless angle adjustable aircraft seat according to claim 8, characterized in that: The backrest frame (200) is externally fitted with a plastic decorative outer frame (500), the safety plate (3026) is located inside the plastic decorative outer frame (500), and a protective skin (600) is fixedly installed on the back of the plastic decorative outer frame (500).

10. A locking type stepless angle adjustable aircraft seat according to claim 9, characterized in that: A fixed seat (101) is fixedly installed on the inner wall of the seat frame (100) near the worm gear reducer motor (3012). The U-shaped bearing seat (301) is fixedly installed on the top of the fixed seat (101). The worm gear reducer motor (3012) is fixedly installed on the side of the worm gear reducer motor (3012) by a fixed bracket.

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