CN111994285B

CN111994285B - Aerospace seat

Info

Publication number: CN111994285B
Application number: CN202010909123.2A
Authority: CN
Inventors: 何锦霞
Original assignee: Nanjing Yusheng Robot Technology Co Ltd
Current assignee: Nanjing Yusheng Robot Technology Co Ltd
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2022-07-19
Anticipated expiration: 2040-09-02
Also published as: CN111994285A

Abstract

The invention relates to the technical field of aviation and aircraft accessories and discloses a seat for aerospace, which comprises a seat body, wherein a carrying handle is movably connected to one side of the top end of a seat plate of the seat body, a supporting seat is fixedly connected to the bottom end of the seat plate of the seat body, a sliding rail is fixedly connected to the bottom end of the supporting seat, a reset tension spring is fixedly connected to one end of an inner cavity of a bottom plate of the supporting seat, the other end of the reset tension spring is fixedly connected with one end of a carrying plate, an anti-falling plate is fixedly sleeved on the outer wall of the carrying plate, which is located in the supporting seat, and a stop block is fixedly mounted on the inner wall of the supporting seat and on one side of the anti-falling plate. This seat for aerospace through setting up movable contact and static contact, can judge whether to accomplish the lock with meal board and button device by whether movable contact and static contact to whether light up to help the crew to confirm fast that the crew does not accomplish with meal board and pack up the action in the cabin by the warning light, thereby be convenient for the crew to carry out going on of the safety inspection work before the aircraft takes off.

Description

Aerospace seat

Technical Field

The invention relates to the technical field of aviation and aircraft accessories, in particular to a seat for aerospace.

Background

Civil aircraft seat is mainly by the seat support, the back of the chair, it constitutes with the dinner plate at handrail frame and back of the chair rear portion, it is adjustable to possess the lean on angle of the back of the chair respectively, handrail frame can be packed up and extend, can accomodate folding function with the dinner plate, experience the in-process taking the plane, the ascending and decline process of aircraft all need pack up with the dinner plate, in order to avoid the ascending or decline in-process inertia of aircraft to lead to stabbing passenger's occurence of failure with the dinner plate, and simultaneously, the below of front-seat passenger seat is placed to the luggage article that can't place on cabin luggage rack of requirement, prevent that the aircraft from taking place at the condition of flight in-process luggage scatter.

At present, civil aircraft's seat is with dining plate all not have the suggestion and accomodate warning function, when the attendant requires the passenger to accomodate the table, there is the condition that some passengers do not obey the use regulation often, need the attendant to inspect in proper order, not only occupy the preparation time before the aircraft takes off, and the condition of lou examining easily takes place, on the other hand, because the interval space of aircraft seat front and back row is limited, when placing article in front seat below, it is all inconvenient to get to take, and the aircraft takes off and descends the in-process, still easily take place the condition that article scatter, consequently, provide a seat for aerospace.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an aerospace seat which has the advantages that passengers can conveniently check the storage condition of each seat table plate, articles below the seat can be conveniently taken, and the like, and the problem that when the passengers are required to store the table plates by the passengers, the passengers often do not obey the use regulation and need to check in sequence due to the fact that the diner does not have the function of prompting storage and warning, the preparation time before the aircraft takes off and the condition of missed detection is easy to occur is solved.

(II) technical scheme

In order to achieve the purposes of facilitating the inspection of the storage condition of each seat table board by a crew member and facilitating the taking of articles below the seat, the invention provides the following technical scheme: a chair for aerospace comprises a chair body, wherein a handle is movably connected to one side of the top end of a chair body base plate, a supporting seat is fixedly connected to the bottom end of the chair body base plate, a slide rail is fixedly connected to the bottom end of the supporting seat, a reset tension spring is fixedly connected to one end of an inner cavity of a supporting seat bottom plate, the other end of the reset tension spring is fixedly connected with one end of a carrying plate, the outer wall of the carrying plate, which is positioned in the supporting seat, is fixedly sleeved with an anti-falling plate, a stop block is fixedly arranged on the inner wall of the supporting seat and positioned on one side of the anti-falling plate, a slide bar is fixedly arranged on the front side of the carrying plate, the outer portion of the slide bar is in sliding connection with the inner wall of the supporting seat, a front baffle is fixedly connected to one side of the top end of the carrying plate and positioned on the back side of the supporting seat, a side stay bar is hinged to the other side of the top end of the carrying plate, the utility model discloses a dining plate, including side vaulting pole, the other end of vaulting pole and the middle part fixed connection who carries the thing board top, the one end of carrying the thing board articulates there is the backplate, the positive top of backplate articulates there is opening and closing device, the bottom fixed mounting of seat body one side has the couple, the positive swing joint of the connecting axle of seat body bedplate and the back of the chair has meal grillage, meal grillage's other end articulates there is the useful meal board, the one end fixed mounting who uses meal board has the locating plate, the fixed slot has been seted up with the middle part on the positive top of meal board, the inner bottom of fixed slot inlays and is equipped with the movable contact, the top fixed mounting of seat body one side has button device, the inboard of button device inlays and is equipped with the static contact, the top fixed mounting of seat body has the warning light.

Preferably, the headstock gear includes fixed branch, fixed branch's bottom is articulated with the middle part at the supporting seat back, fixed branch's top and the outside activity of linking the axle cup joint, the outside of linking the axle and the back activity that is located fixed branch have cup jointed movable branch, movable branch's bottom is articulated with the positive top of backplate, the outside of linking the axle and the back activity that is located movable branch have cup jointed the installation sleeve, the telescopic outer wall fixedly connected with fixed sleeve of installation, fixed sleeve's inside activity has cup jointed fixed loop bar, the bottom fixedly connected with fastening extension spring of fixed loop bar, the bottom of fastening extension spring and fixed sleeve's inner bottom fixed connection, the location hanging hole has been seted up at the top of fixed loop bar one side, location hanging hole and couple lock.

Preferably, the button device includes the hasp strip, the bottom of hasp strip one side is inlayed and is equipped with the static contact, the middle part fixedly connected with location axle of hasp strip one side, the outside activity of location axle has cup jointed the position sleeve, one side fixed connection of the other end of position sleeve and seat body, the outer wall fixed mounting of location axle has the stopper, position sleeve's inner wall fixed mounting has the locating piece.

Preferably, the total length of the fixed supporting rod and the movable supporting rod is the same as that of the rear baffle plate and the carrying plate, and the back surface of the carrying plate extends out of the back surface of the supporting seat.

Preferably, the number of the limiting blocks and the number of the positioning blocks are two, and the two limiting blocks and the two positioning blocks are symmetrically arranged with the central shaft of the positioning shaft respectively.

Preferably, the arrangement positions of the fixed groove and the button device are arranged in a way of taking the folding and folding position of the dinning plate frame as reference, and the position of the movable contact piece embedded in the fixed groove and the position of the static contact piece embedded in one side of the button device are arranged in a way of being matched.

Preferably, one side of the movable contact is electrically connected with the output end of the divider resistor, the input end and the output end of the divider resistor are respectively and electrically connected with the output end of the main switch and the input end of the warning lamp, the input end of the main switch is electrically connected with the output end of the power supply, and the input end of the power supply is respectively and electrically connected with one side of the static contact and the output end of the warning lamp.

Preferably, the installation position of the main switch is located at the position of a cabin attendant dedicated seat.

Preferably, the electric lead of the movable contact spring is rotated to the inside of the dinning plate frame from the inside of the dinning plate through the inside of the dinning plate and the positioning plate connecting shaft, and then enters the inside of the seat body from the inside of the dinning plate frame through the inside of the dinning plate frame and the seat body connecting shaft.

Preferably, the conductive wire of the static contact piece has the interior of the locking strip and enters the interior of the seat body through the positioning shaft and the positioning sleeve.

(III) advantageous effects

Compared with the prior art, the invention provides an aerospace seat, which has the following beneficial effects:

1. this seat for aerospace through setting up movable contact and static contact, can judge whether to accomplish the lock with meal board and button device by whether movable contact and static contact to whether light up to help the crew to confirm fast that the crew does not accomplish with meal board and pack up the action in the cabin by the warning light, thereby be convenient for the crew to carry out going on of the safety inspection work before the aircraft takes off.

2. This seat for aerospace through carrying thing board, preceding baffle and backplate, can deposit the article that can't arrange cabin top luggage rack in by carrying the thing board, preceding baffle and the seat below luggage rack that the backplate constitutes, cooperates the side of side vaulting pole and diagonal brace to keep off the mechanism and the pulling force resilience mechanism of extension spring that resets simultaneously, can realize the purpose of stably depositing article, and the condition that article scatter takes place when effectively avoiding the aircraft to take off or descend.

3. This seat for aerospace through setting up headstock gear, presses down fixed sleeve by the passenger for movable support pole struts the backplate, is stretched out from the below of supporting seat by the backplate pulling thing board that carries again, accomplishes to get and takes article action back, will fix a position hanging hole and couple lock joint, and under the pulling force rebound effect of extension spring that resets, will carry the thing board and withdraw to the below of supporting seat, thereby the passenger of being convenient for directly gets and takes article, and convenient to use is swift.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a partially enlarged view of the opening and closing device of FIG. 1 according to the present invention;

FIG. 3 is a side view of a dining board according to the present invention;

FIG. 4 is a side view of the opening and closing device of the present invention;

FIG. 5 is an enlarged view taken at A of FIG. 1 according to the present invention;

FIG. 6 is a cross-sectional view of a button device of the present invention;

fig. 7 is a schematic diagram of the circuit connection between the movable contact piece and the static contact piece of the invention.

In the figure: 1. a seat body; 2. c, building a handle; 3. a supporting seat; 4. a slide rail; 5. a return tension spring; 6. a loading plate; 7. an anti-drop plate; 8. a stopper; 9. a slide bar; 10. a front baffle; 11. a side stay bar; 12. a diagonal brace; 13. a tailgate; 14. an opening and closing device; 141. fixing the support rod; 142. a connecting shaft; 143. a movable strut; 144. installing a sleeve; 145. fixing the sleeve; 146. fixing the loop bar; 147. fastening a tension spring; 148. positioning the hanging hole; 15. hooking; 16. a dining plate rack; 17. using a dinning plate; 18. positioning a plate; 19. fixing grooves; 20. a movable contact spring; 21. a button device; 211. a locking strip; 212. positioning the shaft; 213. a positioning sleeve; 214. a limiting block; 215. positioning blocks; 22. a static contact piece; 23. a warning light; 24. a voltage dividing resistor; 25. a master switch; 26. a power source.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, a seat for aerospace use comprises a seat body 1, a carrying handle 2 movably connected to one side of the top end of the seat plate of the seat body 1, a supporting seat 3 fixedly connected to the bottom end of the seat plate of the seat body 1, a slide rail 4 fixedly connected to the bottom end of the supporting seat 3, the slide rail 4 fixedly connected to the slide way of the cabin floor, the connection mode is fixed by an anchor bolt in the prior art, one end of the inner cavity of the bottom plate of the supporting seat 3 is fixedly connected to a return tension spring 5, the other end of the return tension spring 5 is fixedly connected to one end of a carrying plate 6, the outer wall of the carrying plate 6 located in the supporting seat 3 is fixedly sleeved with an anti-falling plate 7, a stopper 8 is fixedly installed on one side of the anti-falling plate 7 on the inner wall of the supporting seat 3, a slide bar 9 is fixedly installed on the front side of the carrying plate 6, the outer side of the top end of the carrying plate 6 is fixedly connected to a front baffle 10 on the back side of the supporting seat 3, the top end of the front baffle 10 is hinged with a side stay bar 11, the other end of the side stay bar 11 is hinged with the other side of the top end of the carrying plate 6, the middle part of the front side of the side stay bar 11 is hinged with an inclined stay bar 12, the other end of the inclined stay bar 12 is fixedly connected with the middle part of the top end of the carrying plate 6, one end of the carrying plate 6 is hinged with a rear baffle 13, the top of the front side of the rear baffle 13 is hinged with an opening and closing device 14, the opening and closing device 14 comprises a fixed support bar 141, the bottom end of the fixed support bar 141 is hinged with the middle part of the back side of the supporting seat 3, the top end of the fixed support bar 141 is movably sleeved with the outside of the connecting shaft 142, a movable support bar 143 is movably sleeved outside the connecting shaft 142 and positioned on the back side of the fixed support bar 141, the total length of the fixed support bar 141 and the movable support bar 143 is the same as the total length of the rear baffle 13 and the carrying plate 6, the back side of the carrying plate 6 extends out of the back side of the supporting seat 3, the back side of the supporting seat is provided with a sliding groove matched with the thickness of the carrying plate 6, the height of the anti-drop plate 7 is larger than the width of a chute arranged on the back of the support seat 3, so as to ensure the sliding connection between the carrier plate 6 and the back of the support seat 3, and the anti-drop plate 7 can not be separated from the inside of the support seat 3, the bottom end of the movable support rod 143 is hinged with the top of the front of the rear baffle 13, the outside of the connecting shaft 142 and the back of the movable support rod 143 are movably sleeved with a mounting sleeve 144, the outer wall of the mounting sleeve 144 is fixedly connected with a fixed sleeve 145, the inside of the fixed sleeve 145 is movably sleeved with a fixed sleeve rod 146, the bottom end of the fixed sleeve rod 146 is fixedly connected with a fastening tension spring 147, the bottom end of the fastening tension spring 147 is fixedly connected with the inner bottom of the fixed sleeve rod 145, the top of one side of the fixed sleeve rod 146 is provided with a positioning hanging hole 148, the positioning hanging hole 148 is buckled with the hook 15, the bottom of one side of the seat body 1 is fixedly provided with the hook 15, the front of the seat plate frame 16 is movably connected with the connecting shaft of the seat back of the seat body 1, the installation mode of the meal plate frame 16 and the seat body 1 adopts the seat installation mode which is disclosed at present, the meal plate frame 16 is movably connected with the fixed shaft end of the seat body 1, the other end of the meal plate frame 16 is hinged with a meal plate 17, one end of the meal plate 17 is fixedly provided with a positioning plate 18, the positioning plate 18 and the extending plate at one end of the meal plate frame 16 form a limiting mechanism, the meal plate 17 is prevented from excessively rotating at one end of the meal plate frame 16, the maximum rotation level of the meal plate 17 is ensured, the middle part of the top end of the front surface of the meal plate 17 is provided with a fixed groove 19, the arrangement positions of the fixed groove 19 and a button device 21 are matched and arranged by taking the folding and folding position of the meal plate frame 16 as a reference, the position of the movable contact 20 embedded in the fixed groove 19 is matched and arranged with the position of a static contact 22 embedded at one side of the button device 21, the meal plate frame 16 is folded and the meal plate 17 is folded, so that the locking strip 211 can be just locked with the fixed groove 19 at the meal plate 17, meanwhile, the movable contact piece 20 contacts with the static contact piece 22, the movable contact piece 20 is embedded in the inner bottom of the fixed groove 19, one side of the movable contact piece 20 is electrically connected with the output end of the voltage dividing resistor 24, the input end and the output end of the voltage dividing resistor 24 are electrically connected with the output end of the main switch 25 and the input end of the warning lamp 23 respectively, the installation position of the main switch 25 is positioned at the position of a special seat for a cabin attendant, the position is determined by the attendant and the safety inspection is started, the input end of the main switch 25 is electrically connected with the output end of the power supply 26, the input end of the power supply 26 is electrically connected with one side of the static contact piece 22 and the output end of the warning lamp 23 respectively, the conducting wire of the movable contact piece 20 is turned into the inside of the dining plate frame 16 through the inside of the connecting shaft of the dining plate 17 and the positioning plate 18, and then enters the inside of the seat body 1 through the inside of the connecting shaft of the dining plate frame 16 and the seat body 1, the conducting wire of the static contact piece 22 has the inside of the locking strip 211 which enters the seat body 1 through the positioning shaft 212 and the positioning sleeve 213 The button device 21 is fixedly arranged at the top end of one side of the seat body 1, the button device 21 comprises a locking strip 211, a static contact 22 is embedded at the bottom of one side of the locking strip 211, a positioning shaft 212 is fixedly connected to the middle of one side of the locking strip 211, a positioning sleeve 213 is movably sleeved outside the positioning shaft 212, the other end of the positioning sleeve 213 is fixedly connected with one side of the seat body 1, a limiting block 214 is fixedly arranged on the outer wall of the positioning shaft 212, a positioning block 215 is fixedly arranged on the inner wall of the positioning sleeve 213, the limiting blocks 214 and the positioning blocks 215 are respectively arranged in pairs, the two limiting blocks 214 and the two positioning blocks 215 are respectively arranged symmetrically by using the central shaft of the positioning shaft 212, the limiting block 214 and the positioning block 215 limit the rotation angle of the positioning shaft 212 relative to the positioning sleeve 213, so as to limit the rotation angle of the locking strip 211 within 180 degrees, the conductive wire of the static contact piece 22 is prevented from being excessively twisted in the locking strip 211 to fall off, the static contact piece 22 is embedded in the inner side of the button device 21, and the warning lamp 23 is fixedly installed at the top end of the seat body 1.

When the device works, a crew member closes the main switch 25, the position of the alarm lamp 23 is the position of the dining board 17 which is not buckled with the button device 21 and is buckled with the dining board 17, the movable contact piece 20 is contacted with the static contact piece 22, the alarm lamp 23 is short-circuited and is extinguished, when a luggage article below the supporting seat 3 is taken and stored, the buckling state of the positioning hanging hole 148 and the hook 15 is pulled, the fixing sleeve 145 is pressed, the movable support rod 143 props open and rotates the rear baffle 13 under the fixed point supporting action of the fixing support rod 141, the rear baffle 13 drives the carrying board 6 to slide out of the supporting seat 3, the resetting tension spring 5 is stretched, after the luggage is placed or taken out of the carrying board 6, the fixing sleeve 145 is loosened, the carrying board 6 slides into the supporting seat 3 under the tension resilience of the resetting tension spring 5, the movable support rod 143 is lifted, the rear baffle 13 is driven to be in a vertical state, the fixed loop bar 146 is then stretched so that the positioning hanging hole 148 is again snapped with the hook 15.

In summary, in the aerospace seat, by arranging the movable contact piece 20 and the static contact piece 22, whether the dinning board 17 and the button device 21 are fastened or not can be judged according to whether the movable contact piece 20 is in contact with the static contact piece 22, so that whether the warning lamp 23 is turned on or not is used for assisting a crew member to quickly confirm where the dinning board is not fastened to be retracted in the cabin, and the crew member can conveniently perform safety check work before taking off the aircraft; through the carrying plate 6, the front baffle plate 10 and the rear baffle plate 13, a luggage rack below a seat, which consists of the carrying plate 6, the front baffle plate 10 and the rear baffle plate 13, can store articles which cannot be arranged on the luggage rack above a cabin, and meanwhile, the purpose of stably storing the articles can be realized by matching with the side baffle mechanisms of the side stay bars 11 and the inclined stay bars 12 and the tension rebounding mechanism of the reset tension spring 5, so that the condition that the articles are scattered when an airplane takes off or descends is effectively avoided; through the arrangement of the opening and closing device 14, a passenger presses the fixed sleeve 145, so that the movable support rod 143 props up the rear baffle 13, the rear baffle 13 pulls the carrying plate 6 to extend out of the lower part of the supporting seat 3, after the object taking action is completed, the positioning hanging hole 148 is buckled with the hook 15, and the carrying plate 6 is retracted to the lower part of the supporting seat 3 under the action of the tension resilience of the reset tension spring 5, so that the passenger can directly take the object conveniently and quickly; the problem of civil aircraft's seat all do not have suggestion and accomodate warning function, when the crew member required the passenger to accomodate the table, often exist some passengers and do not obey the condition of using the regulation, need the crew member to inspect in proper order, not only occupy the preparation time before the aircraft takes off, and the condition of easily taking out of inspection, on the other hand, because the interval space of aircraft seat front and back row is limited, when placing article in front seat below, it is all inconvenient to get to take, and the aircraft takes off and descends the in-process, still easily takes place the biological product condition of scattering is solved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A seat for aerospace, characterized in that: including seat body (1), one side swing joint on seat body (1) bedplate top has to take hand (2), bottom fixedly connected with supporting seat (3) of seat body (1) bedplate, bottom fixedly connected with slide rail (4) of supporting seat (3), the one end fixedly connected with extension spring (5) that resets of supporting seat (3) bottom plate inner chamber, the other end of extension spring (5) that resets and the one end fixed connection who carries thing board (6), it has anticreep board (7) to carry the outer wall fixed cup joint that thing board (6) are located supporting seat (3), the inner wall of supporting seat (3) and the one side fixed mounting that is located anticreep board (7) have dog (8), the positive fixed mounting that carries thing board (6) has draw runner (9), the outside and supporting seat (3) inner wall sliding connection of draw runner (9), carry one side on thing board (6) top and be located back fixedly connected with preceding baffle (10) of supporting seat (3) and baffle (10) ) The utility model discloses a chair, the positive top of preceding baffle (10) articulates there is side vaulting pole (11), the other end of side vaulting pole (11) is articulated with the opposite side on year thing board (6) top, the positive middle part of side vaulting pole (11) articulates there is diagonal brace (12), the other end of diagonal brace (12) and the middle part fixed connection on year thing board (6) top, the one end of carrying thing board (6) articulates there is backplate (13), the positive top of backplate (13) articulates there is headstock gear (14), the bottom fixed mounting of seat body (1) one side has couple (15), the front swing joint of seat body (1) bedplate and the connecting axle of the back of the chair has meal grillage (16), the other end of meal grillage (16) articulates there is meal board (17), the one end fixed mounting with meal board (17) has locating plate (18), fixed slot (19) have been seted up with the middle part on meal board (17) positive top, a movable contact piece (20) is embedded in the inner bottom of the fixing groove (19), a button device (21) is fixedly mounted at the top end of one side of the seat body (1), a static contact piece (22) is embedded in the inner side of the button device (21), and a warning lamp (23) is fixedly mounted at the top end of the seat body (1);

The opening and closing device (14) comprises a fixed support rod (141), the bottom end of the fixed support rod (141) is hinged to the middle of the back of the support seat (3), the top end of the fixed support rod (141) is hinged to the outer portion of a connecting shaft (142), the movable support rod (143) is movably sleeved on the back of the connecting shaft (142) and located on the fixed support rod (141), the bottom end of the movable support rod (143) is hinged to the front top of the rear baffle plate (13), the mounting sleeve (144) is movably sleeved on the outer portion of the connecting shaft (142) and located on the back of the movable support rod (143), the outer wall of the mounting sleeve (144) is fixedly connected with the fixed sleeve (145), the fixed sleeve rod (146) is sleeved on the inner portion of the fixed sleeve rod (145), the fastening tension spring (147) is fixedly connected to the bottom end of the fixing sleeve rod (146), and the inner bottom of the fastening tension spring (147) is fixedly connected with the inner bottom of the fixed sleeve (145), the top of one side of the fixed loop bar (146) is provided with a positioning hanging hole (148), and the positioning hanging hole (148) is buckled with the hook (15);

the button device (21) comprises a lock catch strip (211), a static contact piece (22) is embedded in the bottom of one side of the lock catch strip (211), a positioning shaft (212) is fixedly connected to the middle of one side of the lock catch strip (211), a positioning sleeve (213) is movably sleeved outside the positioning shaft (212), the other end of the positioning sleeve (213) is fixedly connected with one side of the seat body (1), a limiting block (214) is fixedly installed on the outer wall of the positioning shaft (212), and a positioning block (215) is fixedly installed on the inner wall of the positioning sleeve (213);

The total length of the fixed support rod (141) and the movable support rod (143) is the same as that of the rear baffle plate (13) and the carrying plate (6), and the back surface of the carrying plate (6) extends out of the back surface of the support seat (3);

the number of the limiting blocks (214) and the number of the positioning blocks (215) are two, and the two limiting blocks (214) and the two positioning blocks (215) are symmetrically arranged with the central axis of the positioning shaft (212) respectively;

the arrangement positions of the fixed groove (19) and the button device (21) are in adaptive arrangement by taking the folding and retracting position of the dining plate frame (16) as reference, and the position of the movable contact piece (20) embedded in the fixed groove (19) is in adaptive arrangement with the position of the static contact piece (22) embedded in one side of the button device (21);

one side of the movable contact piece (20) is electrically connected with the output end of the voltage dividing resistor (24), the input end and the output end of the voltage dividing resistor (24) are respectively and electrically connected with the output end of the main switch (25) and the input end of the warning lamp (23), the input end of the main switch (25) is electrically connected with the output end of the power supply (26), and the input end of the power supply (26) is respectively and electrically connected with one side of the static contact piece (22) and the output end of the warning lamp (23); the installation position of the main switch (25) is positioned at the position of a special seat for cabin crew;

The electric lead of the movable contact piece (20) is turned from the inside of the dinning plate (17) to the inside of the dinning plate rack (16) through the inside of the connecting shaft of the dinning plate (17) and the positioning plate (18), and then enters the inside of the seat body (1) from the inside of the dinning plate rack (16) through the inside of the connecting shaft of the dinning plate rack (16) and the seat body (1);

the conductive wire of the static contact piece (22) is provided with a lock catch strip (211), and the interior of the lock catch strip (211) enters the interior of the seat body (1) through a positioning shaft (212) and a positioning sleeve (213);

the crew closes the master switch, the position that the warning light is lighted is the position of not lock packing up with dinning board and button device promptly, and the position of packing up with dinning board and button device lock, the movable contact contacts with the static contact, the short circuit of warning light is extinguished, when taking and taking the luggage article of supporting seat below, pull out the lock state of location hanging hole and couple, press down the fixed sleeve, under the fixed point supporting role of fixed branch, movable branch struts the backplate and rotates, carry the thing board roll-off in the supporting seat by the backplate drive, tensile extension spring that resets simultaneously, place or take out the luggage and carry the thing board after, loosen the fixed sleeve, under the pulling force rebound effect of extension spring that resets, carry the thing board and slide into the supporting seat, and make movable branch rise, drive backplate and change into the vertical state, then tensile fixed loop bar, make location hanging hole and couple lock once more.