Seat back table and vehicle equipped with the same

Abstract

The present application relates to a kind of seat back table board and vehicle equipped with the seat back table board, seat back table board includes: two first supports, which are mounted to the back of seat back, each first support is provided with first connecting part and second connecting part;Two first connecting rods, the first end of first connecting rod is hinged to the second connecting part of corresponding one first support;Table board assembly is provided with mutually parallel first side and second side and mutually parallel third side and fourth side, first side can be hinged to two first connecting parts, the second end of first connecting rod can be slidably and relatively rotatably connected to the part of corresponding third side or fourth side close to second side;Table board assembly can be rotated to the state of being substantially parallel to seat back around two first connecting parts, and can be fixed in the state of being substantially parallel to seat back, or rotated to horizontal state around two first connecting parts, and can be fixed in horizontal state.

Description

Technical Field

[0001] This invention relates to the field of vehicles, and more particularly to a seat back table and a vehicle equipped with the seat back table. Background Technology

[0002] The fast pace of modern work and life means that people want to work or use their computers while traveling, but riding in a car without a backrest or table means that passengers have to hold their laptops or documents in their hands, which is very inconvenient.

[0003] Therefore, there is a need for further improvement of the existing seat backrests.

[0004] The information disclosed in the background section of this invention is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention provides a seat back table and a vehicle equipped with the seat back table. The seat back table can rotate around a first connecting part to a state that is approximately parallel to the seat back and can be fixed in a state that is approximately parallel to the seat back, or rotate around the first connecting part to a horizontal state and can be fixed in a horizontal state.

[0006] According to a first aspect of the present invention, a seat back table is provided, comprising: two first supports mounted to the rear of the seat back, each of the two first supports having a first connecting portion and a second connecting portion; two first links, each of the two first links having a first end hinged to a second connecting portion of a corresponding first support; and a table assembly having mutually parallel first and second sides and mutually parallel third and fourth sides, the first sides being hinged to the two first connecting portions, and the second ends of each of the two first links being slidably and rotatably connected to a corresponding third or fourth side; wherein the table assembly is rotatable about the two first connecting portions to a state substantially parallel to the seat back and is fixed in a state substantially parallel to the seat back, or rotatable about the two first connecting portions to a horizontal state and is fixed in a horizontal state.

[0007] Preferably, the seat back table further includes: two second supports installed behind the seat back, and the two second supports located below the two first supports; two second links, the first end of each of the two second links being hinged to a corresponding second support, and the second end of each of the two second links being slidably and rotatably connected to a corresponding third or fourth side; wherein the table assembly is capable of rotating to a horizontal state around the second end of the first link after the first side of the table assembly is disengaged from the first connecting portion, and is capable of being fixed in a horizontal state.

[0008] Preferably, each of the two first supports further comprises: a first mounting plate mounted to the rear of the seat back; a first extension plate vertically disposed on one side of the first mounting plate to form the first connecting portion, the first extension plate having a first mounting hole, the first side being hinged to the first extension plate of each of the two first supports; and a second extension plate vertically disposed on the other side of the first mounting plate to form the second connecting portion, the first end of each of the two first links being hinged to a corresponding second extension plate.

[0009] Preferably, each of the two second brackets includes: a second mounting plate mounted to the rear of the seat back; and a third extension plate vertically disposed on one side of the second mounting plate, with the first end of each of the two second links hinged to a corresponding third extension plate.

[0010] Preferably, the tabletop assembly has two symmetrical locking components located near a first side of the tabletop assembly. Each locking component includes: a connecting part sliding groove and a connecting part locking groove, the connecting part sliding groove communicating with the connecting part locking groove, the connecting part locking groove communicating with the outer surface of the first side of the tabletop assembly, the connecting part locking groove being closer to a corresponding third or fourth side of the tabletop assembly than the connecting part sliding groove; a connecting part cable; and a locking pin, which is slidably mounted in the connecting part sliding groove and installed to elastically bias towards the connecting part locking groove, the first end of the locking pin being connected to the first end of the connecting part cable, and the second end of the locking pin being connected to the first end of the connecting part cable. Both ends are provided with a first arc surface; wherein, under the action of external force, the first extension plate can contact and push the first arc surface of the corresponding locking pin, so that the locking pin disengages from the locking groove of the connecting part, thereby allowing the first extension plate to be inserted into the locking groove of the connecting part; after the first extension plate is inserted into the corresponding locking groove of the connecting part, the locking pin is inserted into the first mounting hole of the first extension plate under the action of elastic force, so that the first extension plate is confined in the locking groove of the connecting part, thereby allowing the first side of the table assembly to be hinged to the first extension plate; under the traction of the connecting cable, the locking pin can disengage from the first mounting hole of the first extension plate, so that the first side of the table assembly can disengage from the first extension plate.

[0011] Preferably, the second end of each of the two first links is provided with a first protrusion extending toward the corresponding third or fourth side.

[0012] Preferably, each of the third and fourth sides of the tabletop assembly is provided with a first limiting component. Each first limiting component includes: a first connecting rod sliding groove and a first connecting rod locking groove. The first connecting rod sliding groove communicates with the outer surface of the corresponding third or fourth side of the tabletop assembly. The first connecting rod sliding groove is closer to the outer surface of the corresponding third or fourth side than the first connecting rod locking groove. Two first through holes are provided between the first connecting rod sliding groove and the first connecting rod locking groove. A first pull plate is installed to the first connecting rod locking groove. Two first locking tongues are provided, each first locking tongue passing through the first pull plate and the corresponding first through hole. Each first locking tongue is installed to elastically bias towards the first connecting rod sliding groove. Each first latch has a second arc surface at one end near the corresponding third or fourth side, and the two second arc surfaces face each other; and a first link cable, the first end of which is connected to the first pull plate; wherein, under the traction of the first link cable, the first pull plate can drive the two first latches to disengage from the first link sliding groove, so that the first protrusion at the second end of the first link can slide within the first link sliding groove; when there is no traction of the first link cable, each first latch passes through the corresponding first through hole and is fixed within the first link sliding groove under the action of elastic force, so that the first protrusion at the second end of the first link can be confined between one of the two first latches and the side wall of the first link sliding groove.

[0013] Preferably, the two first locking tongues are integrally formed with the first pull plate.

[0014] Preferably, the two first locking tongues and the first pull plate are formed independently of each other.

[0015] Preferably, the first pull plate is provided with a first through hole corresponding to the first through hole, and the first latch is provided with a first stop portion. The width of the first stop portion is greater than the width of the corresponding first through hole, so that the first stop portion can drive the first pull plate to bias towards the first connecting rod sliding groove, and the first pull plate can drive the first stop portion to move away from the first connecting rod sliding groove, thereby enabling the first pull plate to drive the first latch to disengage from the first connecting rod sliding groove.

[0016] Preferably, each of the two second links has a second protrusion extending toward the corresponding third or fourth side at its second end.

[0017] Preferably, the third and fourth sides of the tabletop assembly are provided with second limiting components, each second limiting component including: a second link sliding groove and a second link locking groove, the second link sliding groove communicating with the outer surface of the corresponding third or fourth side of the tabletop assembly, the second link sliding groove being closer to the outer surface of the corresponding third or fourth side than the second link locking groove, and two second through holes being provided between the second link sliding groove and the second link locking groove; a second pull plate, which is installed to the second link locking groove; and two second locking tongues, each second locking tongue passing through the second pull plate and the corresponding second through hole, each second locking tongue being installed to elastically bias towards the second link sliding groove. Each second latch has a third arc surface at one end near the corresponding third or fourth side, with the two third arc surfaces facing each other; and a second linkage cable, the first end of which is connected to the second pull plate; wherein, under the traction of the second linkage cable, the second pull plate can drive the two second latches to disengage from the second linkage sliding groove, so that the second protrusion at the second end of the second linkage can slide within the second linkage sliding groove; when there is no traction from the second linkage cable, each second latch passes through the corresponding second through hole and is fixed within the second linkage sliding groove under the action of elastic force, so that the second protrusion at the second end of the second linkage can be confined between one of the two second latches and the side wall of the second linkage sliding groove.

[0018] Preferably, the two second locking tongues are integrally formed with the second pull plate.

[0019] Preferably, the two second locking tongues and the second pull plate are formed independently of each other.

[0020] Preferably, the second pull plate is provided with a second through hole corresponding to the second through hole, and the second latch is provided with a second stop portion. The width of the second stop portion is greater than the width of the corresponding second through hole, so that the second stop portion can drive the second pull plate to bias towards the sliding groove of the second connecting rod, and the second pull plate can drive the second stop portion to move away from the sliding groove of the second connecting rod, thereby enabling the second pull plate to drive the second latch to disengage from the sliding groove of the second connecting rod.

[0021] Preferably, the seat back table further includes: a first unlocking handle, which is pivotally mounted to the middle of the second side of the table assembly, the first unlocking handle being connected to the second end of the first linkage cable; wherein, the first unlocking handle can pull the first linkage cable while rotating, so that the first pull plate can drive the two first locking tongues to disengage from the first linkage sliding groove, thereby allowing the first protrusion at the second end of the first linkage to slide within the first linkage sliding groove.

[0022] Preferably, the seat back table further includes: a second unlocking handle, which is pivotally mounted to the middle of the first side of the table assembly, the second unlocking handle being connected to the second end of the connecting cable and the second end of the second link cable; wherein, the second unlocking handle can pull the connecting cable while rotating, so that the locking pin can disengage from the first mounting hole of the first extension plate, thereby allowing the first side of the table assembly to disengage from the first extension plate; the second unlocking handle can pull the second link cable while rotating, so that the second pull plate can drive the two second locking tongues to disengage from the second link sliding groove, thereby allowing the second protrusion at the second end of the second link to slide within the second link sliding groove.

[0023] According to a second aspect of the invention, a vehicle is provided equipped with a seat back table as described in the first aspect.

[0024] The seat back table of the present invention can be rotated around the first connecting part to a state that is substantially parallel to the seat back and can be fixed in a state that is substantially parallel to the seat back, or rotated around the first connecting part to a horizontal state and can be fixed in a horizontal state.

[0025] The methods and apparatus of the present invention have other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and subsequent embodiments incorporated herein, which together serve to explain the particular principles of the invention. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of the seat back table according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 Corresponding exploded view;

[0028] Figure 3 This is a schematic diagram of the internal structure of the tabletop assembly;

[0029] Figure 4 This is a schematic diagram of the first support structure;

[0030] Figure 5 This is a schematic diagram of the second support structure;

[0031] Figure 6 This is a structural diagram of the locking component;

[0032] Figure 7 This is a schematic diagram of the locking pin structure;

[0033] Figure 8 A schematic diagram of the locking pin being inserted into the first extension plate;

[0034] Figure 9 This is a schematic diagram showing the locking pin not inserted into the first extension plate.

[0035] Figure 10 This is a schematic diagram of the structure of the first limiting component;

[0036] Figure 11 This is a schematic diagram of the second limiting component;

[0037] Figure 12 This is a schematic diagram showing the connection between the first locking tongue and the elastic element;

[0038] Figure 13 This is a schematic diagram showing the connection between the second locking tongue and the elastic element;

[0039] Figure 14 This is a schematic diagram showing the first position of the second protrusion and the second latch.

[0040] Figure 15 This is a schematic diagram showing the second position of the second protrusion and the second locking tongue;

[0041] Figure 16 This is a schematic diagram showing the third position of the second protrusion and the second latch;

[0042] Figure 17 This is a schematic diagram showing the position of the seat back table and the seat back according to an embodiment of the present invention;

[0043] Figure 18 This is a diagram showing the seat back table in its stowed state.

[0044] Figure 19 The first schematic diagram shows the seat backrest table being flipped upwards.

[0045] Figure 20 The second schematic diagram shows the seat backrest table being flipped upwards.

[0046] Figure 21 The first schematic diagram shows the seat backrest table being flipped downwards.

[0047] Figure 22 The second schematic diagram shows the seat backrest table being flipped downwards.

[0048] Figure 23 This is a schematic diagram of the structure of another seat back table according to an embodiment of the present invention;

[0049] Figure 24 The first schematic diagram shows the usage state of the seat back table.

[0050] Figure 25 This is a second schematic diagram showing the usage state of the seat back table.

[0051] It should be understood that the accompanying drawings are not necessarily drawn to scale, but rather present simplified representations of various features to illustrate the basic principles of the invention. Specific design features disclosed in this invention (including, for example, specific dimensions, orientations, positions, and shapes) will be determined in part by the specific environment in which they are intended for application and use.

[0052] Throughout these figures, the same reference numerals denote the same or equivalent parts of the invention. Detailed Implementation

[0053] Reference will now be made in detail to various embodiments of the invention, examples of which are presented in the accompanying drawings and described below. Although the invention will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the invention to these exemplary embodiments. Rather, the invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit of the invention and the scope defined by the appended claims.

[0054] According to an embodiment of the present invention, a seat back tray is installed on the back of the front seat for use by rear passengers.

[0055] The following is combined with Figures 1 to 25 The seat back table according to an embodiment of the present invention will be described.

[0056] like Figures 1 to 25 As shown, the seat back table according to an embodiment of the present invention includes: two first supports 110 and 120, two first connecting rods 210 and 220, and a table assembly 300.

[0057] Two first brackets 110 and 120 are installed behind the seat back 500. Each of the two first brackets 110 and 120 is provided with a first connecting part 111 and a second connecting part 112 (see details). Figure 4 ).

[0058] The first end of each of the two first links 210 and 220 is hinged to the second connecting part 112 of a corresponding first bracket 110 and 120.

[0059] The tabletop assembly 300 is provided with a first side 301 and a second side 302 that are parallel to each other, as well as a third side 303 and a fourth side 304 that are parallel to each other. The first side 301 can be hinged to two first connecting parts 111. The second end of each of the two first connecting rods 210 and 220 can be slidably and rotatably connected to the portion of the corresponding third side 303 or fourth side 304 near the second side 302.

[0060] That is, the first end of the first link 210 is hinged to the second connecting portion 112 of the first bracket 110, the second end of the first link 210 is slidably and rotatably connected to the portion of the third side 303 near the second side 302, the first end of the first link 220 is hinged to the second connecting portion 112 of the first bracket 120, and the second end of the first link 220 is slidably and rotatably connected to the portion of the fourth side 304 near the second side 302.

[0061] The table assembly 300 can rotate around the two first connecting parts 111 to a state that is substantially parallel to the seat back 500, and can be fixed in a state that is substantially parallel to the seat back 500 (see also...). Figure 17 Alternatively, it can be rotated to a horizontal position around the two first connecting portions 111 and can be fixed in a horizontal position (see also...). Figure 20 ).

[0062] According to an embodiment of the present invention, the seat back table is installed behind the front seat back of the vehicle. It can be rotated to a horizontal position for use by rear passengers, and can also be rotated to a position parallel to the front seat back when not in use, so as to save space.

[0063] The first side 301, the third side 303, the second side 302 and the fourth side 304 are connected in sequence to form a quadrilateral structure to form the frame of the table panel assembly 300.

[0064] In an exemplary implementation, the quadrilateral structure is a rectangular structure.

[0065] In an exemplary implementation, such as Figures 1 to 3 As shown, the seat back table further includes: two second supports 130 and 140 and two second connecting rods 230 and 240.

[0066] Two second brackets 130 and 140 are installed behind the seat back 500, and the two second brackets 130 and 140 are located below the two first brackets 110 and 120, that is, the second bracket 130 is located below the first bracket 110 and the second bracket 140 is located below the first bracket 120.

[0067] The first end of each of the two second links 230, 240 is hinged to a corresponding second bracket 130, 140, and the second end of each of the two second links 230, 240 is slidably and rotatably connected to the portion of the corresponding third side 303 or fourth side 304 near the first side 301.

[0068] That is, the first end of the second link 230 is hinged to the second bracket 130, the second end of the second link 230 is slidably and rotatably connected to the portion of the third side 303 near the first side 301, the first end of the second link 240 is hinged to the second bracket 140, and the second end of the second link 240 is slidably and rotatably connected to the portion of the fourth side 304 near the first side 301.

[0069] The tabletop assembly 300 is capable of rotating to a horizontal position around the second ends of the first connecting rod 210 and the second ends of the first connecting rod 220 after its first side portion 301 disengages from the first connecting portion 111, and is also capable of being fixed in a horizontal position (see attached diagram). Figure 22 ).

[0070] In an exemplary embodiment, each of the two first brackets 110, 120 further includes: a first mounting plate 113, a first extension plate 114, and a second extension plate 116.

[0071] The first mounting plate 113 is installed behind the seat back 500.

[0072] The first extension plate 114 is vertically disposed on one side of the first mounting plate 113 to form the first connecting portion 111. The first extension plate 114 is provided with a first mounting hole 115. The first side portion 301 can be hinged to the first extension plate 114 of each of the two first brackets 110 and 120.

[0073] The second extension plate 116 is vertically disposed on the other side of the first mounting plate 113 to form the second connecting portion 112, wherein the first end of each of the two first connecting rods 210, 220 is hinged to a corresponding second extension plate 116.

[0074] In an exemplary implementation, such as Figure 4 As shown, the first bracket 110 further includes: a first mounting plate 113, a first extension plate 114, and a second extension plate 116.

[0075] The first mounting plate 113 is installed behind the seat back 500.

[0076] The first extension plate 114 is vertically disposed on one side of the first mounting plate 113 to form the first connecting portion 111. The first extension plate 114 is provided with a first mounting hole 115, and the first side portion 301 can be hinged to the first extension plate 114.

[0077] The second extension plate 116 is vertically disposed on the other side of the first mounting plate 113 to form the second connecting portion 112, and the first end of the first connecting rod 210 is hinged to the second extension plate 116.

[0078] The first mounting hole 115 is used to engage with the locking pin 309, which will be described later, to hinge the first side 301 of the tabletop assembly 300 to the first extension plate 114 of each of the two first brackets 110 and 120.

[0079] Specifically, the first mounting plate 113 is mounted approximately parallel to the backrest 500 and attached to the rear of the backrest 500.

[0080] In an exemplary implementation, such as Figure 4 As shown, a pin 117 is provided on the second extension plate 116. The first end of the first connecting rod 210 is hinged to the second extension plate 116 of the first bracket 110 through the pin 117, and the first end of the first connecting rod 220 is hinged to the second extension plate 116 of the first bracket 120 through the pin 117.

[0081] The first bracket 120 has the same structure as the first bracket 110 and is symmetrically arranged behind the seat back 500. The structure of the first bracket 120 will not be described in detail here.

[0082] In an exemplary embodiment, each of the two second brackets 130, 140 includes a second mounting plate 131 and a third extension plate 132.

[0083] The second mounting plate 131 is installed behind the seat back 500.

[0084] The third extension plate 132 is vertically disposed on one side of the second mounting plate 131, and the first end of each of the two second connecting rods 230, 240 is hinged to a corresponding third extension plate 132.

[0085] In an exemplary implementation, such as Figure 5 As shown, the second bracket 130 includes a second mounting plate 131 and a third extension plate 132.

[0086] The second mounting plate 131 is installed behind the seat back 500.

[0087] The third extension plate 132 is vertically disposed on one side of the second mounting plate 131, and the first end of the second connecting rod 230 is hinged to the third extension plate 132 of the second bracket 130.

[0088] Specifically, the second mounting plate 131 is mounted approximately parallel to the backrest 500 to the rear of the seat backrest 500.

[0089] In an exemplary implementation, such as Figure 5 As shown, a pin 133 is provided on the third extension plate 132, and the first end of the second connecting rod 230 is hinged to the third extension plate 132 through the pin 133.

[0090] Specifically, the first end of the second link 230 is hinged to the third extension plate 132 of the second bracket 130 via pin 133, and the first end of the second link 240 is hinged to the third extension plate 132 of the second bracket 140 via pin 133.

[0091] The second bracket 140 has the same structure as the second bracket 130 and is symmetrically arranged behind the seat back 500. The structure of the second bracket 140 will not be described in detail here.

[0092] In an exemplary implementation, such as Figures 1 to 3 , Figure 6 and Figure 7 As shown, the interior of the tabletop assembly 300 is provided with two symmetrical locking components 305 near the first side 301 of the tabletop assembly 300. Each locking component 305 includes: a connecting part sliding groove 306, a connecting part locking groove 307, a connecting part cable 308, and a locking pin 309.

[0093] The connecting portion sliding groove 306 connects to the connecting portion locking groove 307, which in turn connects to the outer surface of the first side portion 301 of the tabletop assembly 300. The connecting portion locking groove 307 is closer to the corresponding third side portion 303 or fourth side portion 304 of the tabletop assembly 300 than the connecting portion sliding groove 306. That is, the connecting portion locking groove 307 of the locking component 305 closer to the third side portion 303 is closer to the third side portion 303 than the connecting portion sliding groove 306, while the connecting portion locking groove 307 of the locking component 305 closer to the fourth side portion 304 is closer to the fourth side portion 304 than the connecting portion sliding groove 306.

[0094] The locking pin 309 is slidably mounted in the sliding groove 306 of the connecting part and is installed to be elastically biased toward the locking groove 307 of the connecting part. The first end of the locking pin 309 is connected to the first end of the connecting cable 308, and a portion of the second end of the locking pin 309 is provided with a first arc surface 310 (see also [reference]). Figure 7 ).

[0095] Under the action of external force, the first extension plate 114 can contact and push the first arc surface 110 of the corresponding locking pin 309, so that the locking pin 110 disengages from the connecting part locking groove 307 (i.e., is completely retracted into the connecting part sliding groove 306), thereby allowing the first extension plate 114 to be inserted into the connecting part locking groove 307 (see also [reference]). Figure 9 ).

[0096] After the first extension plate 114 is inserted into the corresponding connecting locking groove 307, the locking pin 309 is inserted into the first mounting hole 115 of the first extension plate 114 under the action of elastic force, so as to limit the first extension plate 114 within the connecting locking groove 307, thereby allowing the first side portion 301 of the tabletop assembly 300 to be hinged to the first extension plate 114 (see details). Figure 8 ).

[0097] Under the pull of the connecting cable 308, the locking pin 309 can disengage from the first mounting hole 115 of the first extension plate 114, so that the first side portion 301 of the tabletop assembly 300 can disengage from the first extension plate 114 (see also...). Figure 9 ).

[0098] Specifically, the locking assembly 305 further includes an elastic element 312, which is disposed between the first end of the locking pin 309 and the side wall 313 of the connecting portion sliding groove 306 away from the connecting portion locking groove 307, so that the locking pin 309 is installed to be elastically biased toward the connecting portion locking groove 307 (see also [reference]). Figure 6 ).

[0099] For example, the elastic element 312 can be a spring, but the type of elastic element 312 is not limited to this. It can be any form in the prior art, as long as it can achieve the above-mentioned function.

[0100] In an exemplary implementation, such as Figure 2 As shown, each of the two first links 210, 220 has a first protrusion 211 extending toward the corresponding third side 303 or fourth side 304 at its second end.

[0101] In an exemplary embodiment, each of the third side 303 and the fourth side 304 of the tabletop assembly 300 is provided with a first limiting component 314 near the second side 302. Each first limiting component 314 includes: a first link sliding groove 315, a first link locking groove 316, a first pull plate 317, two first locking tongues 318 and 319, and a first link cable 320 (see attached diagram). Figure 3 and Figure 10 ).

[0102] The first link sliding groove 315 is connected to the outer surface of the corresponding third side 303 or fourth side 304 of the table assembly 300. The first link sliding groove 315 is closer to the outer surface of the corresponding third side 303 or fourth side 304 than the first link locking groove 316. That is, the first link sliding groove 315 of the first limiting assembly 314 of the third side 303 is closer to the outer surface of the third side 303 than the first link locking groove 316, and the first link sliding groove 315 of the first limiting assembly 314 of the fourth side 304 is closer to the outer surface of the fourth side 304 than the first link locking groove 316. Two first through holes 321 and 322 are provided between the first link sliding groove 315 and the first link locking groove 316.

[0103] The first pull plate 317 is installed into the first connecting rod locking groove 316.

[0104] Each first latch 318, 319 passes through the first pull plate 317 and the corresponding first through hole 321, 322. Each first latch 318, 319 is installed to be elastically biased toward the first connecting rod sliding groove 315. Each first latch 318, 319 has a second arc surface 323 at one end 324 near the corresponding third side 303 or fourth side 304, and the two second arc surfaces 323 face each other (see mating details). Figure 3 , Figure 10 and Figure 12 ).

[0105] That is, the first locking tongue 318 passes through the first pull plate 317 and the first through hole 321, and the first locking tongue 319 passes through the first pull plate 317 and the first through hole 322.

[0106] A second arc surface 323 is provided at one end 324 of the first locking tongue 318 and 319 of the first limiting component 314 of the third side 303 near the third side 303, and the second arc surface 323 of the first locking tongue 318 and the second arc surface 323 of the first locking tongue 319 of the first limiting component 314 of the third side 303 face each other.

[0107] The first locking tongues 318 and 319 of the first limiting component 314 of the fourth side 304 are provided with a second arc surface 323 at one end 324 near the fourth side 304, and the second arc surface 323 of the first locking tongue 318 and the second arc surface 323 of the first locking tongue 319 of the first limiting component 314 of the fourth side 304 face each other.

[0108] Under the action of external force, the first protrusion 211 can contact and push the second arc surface 323 of the first locking tongue 319 to push the first locking tongue 319 to the state of disengaging from the first link sliding groove 315 (i.e., fully retracted into the first link locking groove 316), thereby allowing the first protrusion 211 to pass over the first locking tongue 319 and limiting the first protrusion 211 between the side wall 346 of the first link sliding groove 315 and the first locking tongue 319.

[0109] Under the action of external force, the first protrusion 211 can contact and push the second arc surface 323 of the first locking tongue 318 to push the first locking tongue 318 to the state of disengaging from the first connecting rod sliding groove 315 (i.e., fully retracted into the first connecting rod locking groove 316), thereby allowing the first protrusion 211 to pass over the first locking tongue 318 and limiting the first protrusion 211 between the side wall 346 of the first connecting rod sliding groove 315 and the first locking tongue 318.

[0110] The first end of the first connecting cable 320 is connected to the first pull plate 317 (see also the following for details). Figure 10 ).

[0111] Under the traction of the first link cable 320, the first pull plate 317 can drive the two first locking tongues 318 and 319 to disengage from the first link sliding groove 315 (i.e., be completely retracted into the first link locking groove 316), so that the first protrusion 211 at the second end of the first link 210 and 220 can slide within the first link sliding groove 315.

[0112] When there is no traction from the first link cable 320, each first latch 318, 319 passes through the corresponding first through hole 321, 322 under the action of elastic force and is fixed in the first link sliding groove 315, so that the first protrusion 211 at the second end of the first link 210, 220 can be confined between one of the two first latches 318, 319 and the side wall 346 of the first link sliding groove 315. That is, when there is no traction from the first link cable 320, the first locking tongue 318 passes through the first through hole 321 under the action of elastic force and is fixed in the first link sliding groove 315, and the first locking tongue 319 passes through the first through hole 322 under the action of elastic force and is fixed in the first link sliding groove 315, so that the first protrusion 211 at the second end of the first link 210, 220 can be limited between the first locking tongue 318 and the side wall 346 of the first link sliding groove 315, or limited between the first locking tongue 319 and the side wall 346 of the first link sliding groove 315 (see also [reference]). Figure 10 ).

[0113] In an exemplary embodiment, the first limiting component 314 further includes two elastic members 311 disposed between the other end 325 of the first latches 318, 319 and the sidewall 326 of the first link locking groove 316 away from the corresponding third side 303 or fourth side 304, such that each first latch 318, 319 is mounted to be elastically biased toward the corresponding first link sliding groove 315.

[0114] Specifically, one elastic element 311 of the first limiting component 314 of the third side 303 is disposed between the other end 325 of the first locking tongue 318 and the side wall 326 of the first connecting rod locking groove 316 away from the third side 303, and the other elastic element 311 of the first limiting component 314 of the third side 303 is disposed between the other end 325 of the first locking tongue 319 and the side wall 326 of the first connecting rod locking groove 316 away from the third side 303 (see also [reference]). Figure 10 and Figure 12 ).

[0115] The relationship between the elastic element 311 and the fourth side 304 is the same as the relationship between the elastic element 311 and the third side 303, and will not be described in detail here.

[0116] For example, the elastic element 311 can be a spring, and the type of elastic element 311 is not limited thereto. It can be any form in the prior art, as long as it can achieve the above-mentioned function.

[0117] In one embodiment, the two first locking tongues 318 and 319 are integrated with the first pull plate 317.

[0118] In another embodiment, the two first locking tongues 318, 319 and the first pull plate 317 are independent parts.

[0119] In an exemplary implementation, such as Figure 12 As shown, the first pull plate 317 is provided with first through holes 349 and 350 corresponding to the first through holes 321 and 322, and the first locking tongues 318 and 319 are provided with first stop portions 351 and 352. The width of the first stop portions 351 and 352 is greater than the width of the corresponding first through holes 349 and 350, so that the first stop portions 351 and 352 can drive the first pull plate 317 to be biased towards the first connecting rod sliding groove 315, and the first pull plate 317 can drive the first stop portions 351 and 352 to move away from the first connecting rod sliding groove 315, so that the first pull plate 317 can drive the first locking tongues 318 and 319 to disengage from the first connecting rod sliding groove 315 (i.e., be completely retracted into the first connecting rod locking groove 316).

[0120] Specifically, such as Figure 12As shown, the first pull plate 317 is provided with a first through hole 349 corresponding to the first through hole 321 and a first through hole 350 corresponding to the first through hole 322. The first latch 318 is provided with a first stop portion 351 and the first latch 319 is provided with a first stop portion 352. The width of the first stop portion 351 is greater than the width of the first through hole 349, and the width of the first stop portion 352 is greater than the width of the first through hole 350. This allows the first stop portion 351 and the first stop portion 352 to drive the first pull plate 317 to be biased towards the first connecting rod sliding groove 315, and also allows the first pull plate 317 to drive the first stop portion 351 and the first stop portion 352 to move away from the first connecting rod sliding groove 315. This allows the first pull plate 317 to drive the first latch 318 and the first latch 319 to disengage from the first connecting rod sliding groove 315 (i.e., to be completely retracted into the first connecting rod locking groove 316).

[0121] The first protrusion 211 at the second end of the first connecting rod 210 can slide freely between the first latch 318 and the first latch 319. Under the action of external force, the first protrusion 211 can push the first latch 319 so that the first latch 319 disengages from the first connecting rod sliding groove 315 (i.e., is completely retracted into the first connecting rod locking groove 316), thereby allowing the first protrusion 211 to move towards the side wall 346 of the first connecting rod sliding groove 315. After the first protrusion 211 passes the first latch 319, the first latch 319 re-enters the first connecting rod sliding groove 315 under the action of the elastic member 311, thereby confining the first protrusion 211 between the side wall 346 of the first connecting rod sliding groove 315 and the first latch 319 (see also [reference]). Figures 14 to 16 ).

[0122] When it is necessary to release the first protrusion 211 from between the first latch 319 and the side wall 346, pull the first pull plate 317 to drive the first latch 319 out of the first connecting rod sliding groove 315, thereby releasing the first protrusion 211 so that the first protrusion 211 can slide freely in the first connecting rod sliding groove 315.

[0123] The connection relationship between the first protrusion 211 and the first locking tongue 318 is the same as the connection relationship between the first protrusion 211 and the first locking tongue 319, and will not be repeated here.

[0124] In an exemplary implementation, such as Figure 2 and Figure 11 As shown, each of the two second links 230, 240 has a second protrusion 231 extending toward the corresponding third side 303 or fourth side 304 at its second end.

[0125] In an exemplary embodiment, each of the third side 303 and the fourth side 304 of the tabletop assembly 300 is provided with a second limiting component 327 near the first side 301. Each second limiting component 327 includes: a second link sliding groove 328, a second link locking groove 329, a second pull plate 330, two second locking tongues 331 and 332, and a second link cable 333 (see also the example). Figure 3 and Figure 11 ).

[0126] The second link sliding groove 328 is connected to the outer surface of the corresponding third side 303 or fourth side 304 of the table assembly 300. The second link sliding groove 328 is closer to the outer surface of the corresponding third side 303 or fourth side 304 than the second link locking groove 329. That is, the second link sliding groove 328 of the second limiting assembly 327 of the third side 303 is closer to the outer surface of the third side 303 than the second link locking groove 329, and the second link sliding groove 328 of the second limiting assembly 327 of the fourth side 304 is closer to the outer surface of the fourth side 304 than the second link locking groove 329. Two second through holes 334 and 335 are provided between the second link sliding groove 328 and the second link locking groove 329.

[0127] The second pull plate 330 is installed into the second connecting rod locking groove 329.

[0128] Each second latch 331, 332 passes through the second pull plate 330 and the corresponding second through hole 334, 335. Each second latch 331, 332 is installed to be elastically biased toward the second connecting rod sliding groove 328. A third arc surface 337 is provided at one end 336 of each second latch 331, 332 near the corresponding third side 303 or fourth side 304. The two third arc surfaces 337 face each other (see mating details). Figure 3 , Figure 11 and Figure 13 ).

[0129] That is, the second locking tongue 331 passes through the second pull plate 330 and the second through hole 334, and the second locking tongue 332 passes through the second pull plate 330 and the second through hole 335.

[0130] A third arc surface 337 is provided at one end 336 of the second latch 331 and 332 of the second limiting component 327 of the third side 303 near the third side 303, and the third arc surface 337 of the second latch 331 and the third arc surface 337 of the second latch 332 of the second limiting component 327 of the third side 303 face each other.

[0131] The second locking tongues 331 and 332 of the second limiting component 327 of the fourth side 304 are provided with a third arc surface 337 at one end 336 near the fourth side 304. The third arc surface 337 of the second locking tongue 331 and the third arc surface 337 of the second locking tongue 332 of the second limiting component 327 of the fourth side 304 face each other.

[0132] Under the action of external force, the second protrusion 231 can contact and push the third arc surface 337 of the second latch 331 to push the second latch 331 to the state of disengaging from the second link sliding groove 328 (i.e., fully retracted into the second link locking groove 329), thereby allowing the second protrusion 231 to pass over the second latch 331 and to limit the second protrusion 231 between the side wall 338 of the second link sliding groove 328 and the second latch 331.

[0133] Under the action of external force, the second protrusion 231 can contact and push the third arc surface 337 of the second latch 332 to push the second latch 332 to the state of disengaging from the second link sliding groove 328 (i.e., fully retracted into the second link locking groove 329), thereby allowing the second protrusion 231 to pass over the second latch 332 and to limit the second protrusion 231 between the side wall 338 of the second link sliding groove 328 and the second latch 332.

[0134] The first end of the second link cable 333 is connected to the second pull plate 330 (see also the following for details). Figure 11 ).

[0135] Under the traction of the second link cable 333, the second pull plate 330 can drive the two second locking tongues 331 and 332 to disengage from the second link sliding groove 328 (i.e., be completely retracted into the second link locking groove 329), so that the second protrusion 231 at the second end of the second link 230 and 240 can slide within the second link sliding groove 328.

[0136] When there is no traction from the second link cable 333, each second latch 331, 332 passes through the corresponding second through hole 334, 335 under the action of elastic force and is fixed in the second link sliding groove 328, so that the second protrusion 231 at the second end of the second link 230, 240 can be confined between one of the two second latches 331, 332 and the side wall 338 of the second link sliding groove 328. That is, when there is no traction from the second link cable 333, the second locking tongue 331 passes through the second through hole 334 under the action of elastic force and is fixed in the second link sliding groove 328, and the second locking tongue 332 passes through the second through hole 335 under the action of elastic force and is fixed in the second link sliding groove 328, so that the second protrusion 231 at the second end of the second link 230, 240 can be limited between the second locking tongue 331 and the side wall 338 of the second link sliding groove 328, or limited between the second locking tongue 332 and the side wall 338 of the second link sliding groove 328 (see details). Figure 11 ).

[0137] In an exemplary embodiment, the second limiting component 327 further includes two elastic members 340 disposed between the other end 339 of the second latches 331, 332 and the sidewall 341 of the second link locking groove 329 away from the corresponding third side 303 or fourth side 304, such that each second latch 331, 332 is mounted to be elastically biased toward the corresponding second link sliding groove 328.

[0138] Specifically, one elastic element 340 of the second limiting assembly 327 of the third side 303 is disposed between the other end 339 of the second locking tongue 331 and the side wall 341 of the second link locking groove 329 away from the third side 303, and the other elastic element 340 of the second limiting assembly 327 of the third side 303 is disposed between the other end 339 of the second locking tongue 332 and the side wall 341 of the second link locking groove 329 away from the third side 303 (see details). Figure 11 and Figure 13 ).

[0139] The relationship between the elastic element 340 and the fourth side 304 is the same as the relationship between the elastic element 340 and the third side 303, and will not be described in detail here.

[0140] For example, the elastic element 340 can be a spring, and the type of elastic element 340 is not limited thereto. It can be any form in the prior art, as long as it can achieve the above-mentioned function.

[0141] In one implementation, the two second locking tongues 331 and 332 are integrated with the second pull plate 330.

[0142] In another embodiment, the two second locking tongues 331, 332 and the second pull plate 330 are independent parts.

[0143] In an exemplary implementation, such as Figure 13 As shown, the second pull plate 330 is provided with second through holes 353 and 354 corresponding to the second through holes 334 and 335. The second latches 331 and 332 are provided with second stop portions 355 and 356. The width of the second stop portions 355 and 356 is greater than the width of the corresponding second through holes 353 and 354, so that the second stop portions 355 and 356 can drive the second pull plate 330 to be biased towards the second link sliding groove 328, and the second pull plate 330 can drive the second stop portions 355 and 356 to move away from the second link sliding groove 328, thereby enabling the second pull plate 330 to drive the second latches 331 and 332 to disengage from the second link sliding groove 328 (i.e., be completely retracted into the second link locking groove 329).

[0144] Specifically, such as Figure 13 As shown, the second pull plate 330 is provided with a second through hole 353 corresponding to the second through hole 334, and a second through hole 354 corresponding to the second through hole 335. The second latch 331 is provided with a second stop portion 355, and the second latch 332 is provided with a second stop portion 356. The width of the second stop portion 355 is greater than the width of the second through hole 353, and the width of the second stop portion 356 is greater than the width of the second through hole 354. This allows the second stop portion 355 and the second stop portion 356 to drive the second pull plate 330 to be biased towards the second connecting rod sliding groove 328, and also allows the second pull plate 330 to drive the second stop portion 355 and the second stop portion 356 to move away from the second connecting rod sliding groove 328. This allows the second pull plate 330 to drive the second latch 331 and the second latch 332 to disengage from the second connecting rod sliding groove 328 (i.e., be completely retracted into the second connecting rod locking groove 329).

[0145] The relationship between the second protrusion 231 and the second latches 331 and 332 is the same as the relationship between the first protrusion 211 and the first latches 318 and 319, and will not be repeated here.

[0146] like Figure 10 and Figure 11As shown, when the first protrusion 211 at the second end of the first connecting rod 210 is limited between the first latch 319 and the side wall 346 of the first connecting rod sliding groove 315 (i.e., the first protrusion 211 is limited at the end of the first connecting rod sliding groove 315 near the second side 302), and the second protrusion 231 at the second end of the second connecting rod 230 is limited between the second latch 331 and the side wall 338 of the second connecting rod sliding groove 328 (i.e., the second protrusion 231 is limited at the end of the second connecting rod sliding groove 328 near the first side 301), and the locking pin 309 is inserted into the first mounting hole 115 of the first extension plate 114 under the action of elastic force (see also...), Figure 8 The table assembly 300 can be fixed in a position approximately parallel to the seat back 500 (see details for details). Figure 17 ), which refers to the storage location.

[0147] In an exemplary implementation, such as Figure 2 and Figure 3 As shown, the seat back table further includes: a first unlocking handle 401, which is pivotally mounted to the middle of the second side 302 of the table assembly 300, and the first unlocking handle 401 is connected to the second end of the first linkage cable 320.

[0148] The first unlocking handle 401 can pull the first link cable 320 while rotating, thereby pulling the first pull plate 317. This allows the first pull plate 317 to drive the two first locking tongues 318 and 319 out of the first link sliding groove 315, so that the first protrusion 211 at the second end of the first link 210 and 220 can slide within the first link sliding groove 315.

[0149] When the first latches 318 and 319 disengage from the first link sliding groove 315 and the table assembly 300 receives an upward force, the first protrusion 211 at the second end of the first link 210 and 220 can slide and rotate relative to each other within the first link sliding groove 315, so that the table assembly 300 flips upward until the first protrusion 211 at the second end of the first link 210 is confined between the first latch 318 and the side wall 346 of the first link sliding groove 315 (i.e., the first protrusion 211 is confined at the end of the first link sliding groove 315 away from the second side 302). At this time, the second protrusion 231 at the second end of the second link 230 is still limited between the second locking tongue 331 and the side wall 338 of the second link sliding groove 328 (that is, the second protrusion 231 is limited at the end of the second link sliding groove 328 near the first side 301), and the locking pin 309 is still inserted in the first mounting hole 115 of the first extension plate 114, so the table assembly 300 can be fixed in a position that is approximately flush with the first brackets 110 and 120 (see for details). Figure 20 ).

[0150] In an exemplary implementation, such as Figure 2 and Figure 3 As shown, the seat back table further includes a second unlocking handle 402, which is pivotally mounted to the middle of the first side portion 301 of the table assembly 300, and the second unlocking handle 402 is connected to the second end of the connecting cable 308 and the second end of the second link cable 333.

[0151] The second unlocking handle 402 can pull the connecting cable 308 while rotating, so that the locking pin 309 can disengage from the first mounting hole 115 of the first extension plate 114, thereby allowing the first side 301 of the tabletop assembly 300 to disengage from the first extension plate 114 (see also...). Figure 8 and Figure 9 ).

[0152] Furthermore, the second unlocking handle 402 can pull the second link cable 333 while rotating, thereby pulling the second pull plate 330, so that the second pull plate 330 can drive the two second locking tongues 331 and 332 to disengage from the second link sliding groove 328, thereby allowing the second protrusion 231 at the second end of the second link 230 and 240 to slide within the second link sliding groove 328.

[0153] When the first side portion 301 of the tabletop assembly 300 disengages from the first extension plate 114, the second latches 331 and 332 disengage from the second link sliding groove 328, and the tabletop assembly 300 receives a downward force, the second protrusion 231 at the second end of the second link 230 and 240 can slide and rotate relative to each other within the second link sliding groove 328, causing the tabletop assembly 300 to flip downward until the second protrusion 231 at the second end of the second link 230 is confined between the second latch 332 and the side wall 338 of the second link sliding groove 328 (i.e., the second protrusion 231 is confined at the end of the second link sliding groove 328 away from the first side portion 301). At this time, the first protrusion 211 at the second end of the first connecting rod 210 is still limited between the first locking tongue 319 and the side wall 346 of the first connecting rod sliding groove 315 (that is, the first protrusion 211 is limited at the end of the first connecting rod sliding groove 315 near the second side 302), and the table assembly 300 can be fixed at a position slightly lower than the second brackets 130 and 140 (see reference). Figure 22 ).

[0154] In an exemplary implementation, such as Figure 1 and Figure 2As shown, the table assembly 300 includes a basically symmetrical table 342 and table 343, which together form the main structure of the table assembly 300. When the table assembly 300 is rotated around the two first connecting parts 111 to a state that is approximately parallel to the seat back 500, the table 342 is closer to the seat back 500 than the table 343.

[0155] In an exemplary implementation, such as Figure 1 and Figure 2 As shown, the tabletop 343 can be provided with a placement slot 344 for placing cups and a card slot 345 for placing electronic products such as mobile phones and tablets.

[0156] In an exemplary implementation, such as Figure 3 As shown, the tabletop assembly 300 is provided with guide bosses 347 and 348 inside.

[0157] The guide boss 347 is used to guide the second link cable 333 so that the second unlocking handle 402 can pull the second link cable 333 when rotating. The guide boss 348 is used to guide the first link cable 320 so that the first unlocking handle 401 can pull the first link cable 320 when rotating.

[0158] In an exemplary implementation, such as Figure 23 As shown, the seat back table according to an embodiment of the present invention may include only two first supports 110, 120, two first links 210, 220 and table assembly 300, but does not include second supports 130, 140 and second links 230, 240.

[0159] According to an embodiment of the present invention, a vehicle is equipped with the aforementioned seat back table.

[0160] The operation of the seat back table according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0161] When the seat back table is folded up, such as Figure 17 As shown.

[0162] When the user needs to rotate the tabletop assembly 300 upwards to a horizontal position, the user rotates the first unlocking handle 401. The first unlocking handle 401 pulls the first connecting rod cable 320, which in turn drives the first pull plate 317 to move inwards towards the first connecting rod locking groove 316. This causes the first locking tongue 319 to no longer restrict the first protrusion 211 at the second end of the first connecting rod 210, thereby unlocking the first protrusion 211.

[0163] When the user flips the tabletop assembly 300 upwards, and the tabletop assembly 300 rotates around the first extension plate 114 to a horizontal position, the first protrusion 211 at the second end of the first connecting rod 210 passes over and is limited by the first locking tongue 318, thereby fixing the tabletop assembly 300 in a horizontal position (see also...). Figures 18 to 20 Users can place items on the tabletop assembly 300 (see also...). Figure 24 ).

[0164] When the user no longer needs to use the tabletop assembly 300, they rotate the first unlocking handle 401 again to unlock the first protrusion 211, and then flip the tabletop assembly 300 downwards as if... Figure 17 Storage location.

[0165] When the user needs to rotate the tabletop assembly 300 downwards to a horizontal position, the user rotates the second unlocking handle 402. The second unlocking handle 402 pulls the connecting cable 308 and the second connecting rod cable 333, thereby unlocking the first extension plate 114 and the second protrusion 231. The first extension plate 114 no longer restricts the rotation of the tabletop assembly 300.

[0166] When the user flips the tabletop assembly 300 downwards, and the tabletop assembly 300 rotates to a horizontal position around the second ends of the first connecting rods 210 and 220, the second protrusion 231 at the second end of the second connecting rod 230 passes over and is limited by the second locking tongue 332, thereby fixing the tabletop assembly 300 in a horizontal position (see also...). Figure 21 and Figure 22 Users can place their feet on the tabletop assembly 300 (see also...). Figure 25 ).

[0167] When the user no longer needs to use the tabletop assembly 300, they rotate the second unlocking handle 402 again to unlock the second protrusion 231, and then flip the tabletop assembly 300 upwards as if... Figure 17 The state of storage.

[0168] For ease of interpretation and precise definition of the appended claims, the terms “upper,” “lower,” “inner,” “outer,” “above,” “below,” “above,” “below,” “upward,” “downward,” “front,” “back,” “behind,” “inner side,” “outer side,” “inward,” “outer,” “internal,” “external,” “inner,” “external,” “forward,” and “backward” are used to describe the features of the exemplary embodiments with reference to the positions of these features shown in the accompanying drawings.

[0169] The foregoing description of specific exemplary embodiments of the invention is for illustrative and descriptive purposes. It is not intended to be exhaustive, nor to limit the invention to the precise forms disclosed; clearly, many changes and variations are possible in accordance with the foregoing teachings. The exemplary embodiments were chosen and described to explain the specific principles of the invention and its practical application, thereby enabling others skilled in the art to implement and utilize various exemplary embodiments of the invention, as well as their different alternatives and modifications. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A chair backrest table, comprising: Two first brackets are installed behind the seat back, each of the two first brackets being provided with a first connecting part and a second connecting part; Two first links, each of which has a first end hinged to a second connecting portion of a corresponding first bracket; and A tabletop assembly having a first side and a second side that are parallel to each other, as well as a third side and a fourth side that are parallel to each other. The first side can be hinged to two first connecting parts, and the second end of each of the two first connecting rods can be slidably and rotatably connected to the corresponding third side or fourth side. The table assembly can rotate around the two first connecting parts to a state that is approximately parallel to the seat back and can be fixed in a state that is approximately parallel to the seat back, or it can rotate around the two first connecting parts to a horizontal state and can be fixed in a horizontal state. The seat back table further includes: Two second brackets are mounted to the back of the seat back, and the two second brackets are located below the two first brackets; Two second links, each of which has a first end hinged to a corresponding second bracket, and each of which has a second end slidably and rotatably connected to a corresponding third or fourth side. The tabletop assembly is capable of rotating to a horizontal position around the second end of the first connecting rod after its first side part disengages from the first connecting part, and can be fixed in a horizontal position.

2. The seat back table panel of claim 1, wherein, Each of the two first supports further includes: The first mounting plate is installed behind the seat back; A first extension plate, vertically disposed on one side of a first mounting plate to form the first connecting portion, the first extension plate having a first mounting hole, the first side portion being hinged to the first extension plate of each of the two first brackets; and A second extension plate, which is vertically disposed on the other side of the first mounting plate, forms the second connection portion, wherein the first end of each of the two first links is hinged to a corresponding second extension plate.

3. The seat back table panel of claim 2, wherein, Each of the two second supports includes: A second mounting plate is installed behind the seat back; and A third extension plate is vertically disposed on one side of the second mounting plate, and the first end of each of the two second links is hinged to a corresponding third extension plate.

4. The seat back table panel of claim 3, wherein, The tabletop assembly has two symmetrical locking components located near the first side of the tabletop assembly. Each locking component includes: The connecting part sliding groove and the connecting part locking groove are connected to the connecting part locking groove, and the connecting part locking groove is connected to the outer surface of the first side of the tabletop assembly. The connecting part locking groove is closer to the corresponding third or fourth side of the tabletop assembly than the connecting part sliding groove. Connecting cables; and A locking pin is slidably mounted in the sliding groove of the connecting part and is installed to be elastically biased toward the locking groove of the connecting part. The first end of the locking pin is connected to the first end of the connecting part cable, and the second end of the locking pin is provided with a first arc surface. Under the action of external force, the first extension plate can contact and push the first arc surface of the corresponding locking pin so that the locking pin disengages from the locking groove of the connecting part, thereby allowing the first extension plate to be inserted into the locking groove of the connecting part. After the first extension plate is inserted into the corresponding connecting locking groove, the locking pin is inserted into the first mounting hole of the first extension plate under the action of elastic force, so as to limit the first extension plate in the connecting locking groove, thereby enabling the first side of the table assembly to be hinged to the first extension plate. Under the pull of the connecting cable, the locking pin can disengage from the first mounting hole of the first extension plate, so that the first side of the tabletop assembly can disengage from the first extension plate.

5. The seat back table according to claim 1, wherein, Each of the two first links has a first protrusion at its second end extending toward the corresponding third or fourth side.

6. The seat back table according to claim 5, wherein, Each of the third and fourth sides of the table assembly is provided with a first limiting component, each first limiting component comprising: The first link sliding groove and the first link locking groove are connected to the outer surface of the corresponding third or fourth side of the table assembly. The first link sliding groove is closer to the outer surface of the corresponding third or fourth side than the first link locking groove. Two first through holes are provided between the first link sliding groove and the first link locking groove. The first pull plate is installed into the first connecting rod locking groove; Two first latches, each passing through the first pull plate and a corresponding first through hole, each first latch being mounted to be elastically biased toward the sliding groove of the first connecting rod, each first latch having a second arc surface at one end near a corresponding third or fourth side, and the two second arc surfaces facing each other; and The first link cable has its first end connected to the first pull plate; Under the traction of the first link cable, the first pull plate can drive the two first locking tongues to disengage from the first link sliding groove, so that the first protrusion at the second end of the first link can slide within the first link sliding groove. Without the traction of the first link cable, each first latch passes through the corresponding first through hole and is fixed in the first link sliding groove under the action of elastic force, so that the first protrusion at the second end of the first link can be limited between one of the two first latches and the side wall of the first link sliding groove.

7. The seat back table according to claim 6, wherein, The two first locking tongues are integrated with the first pull plate.

8. The seat back table according to claim 6, wherein, The first pull plate is provided with a first through hole corresponding to the first through hole, and the first lock tongue is provided with a first stop portion. The width of the first stop portion is greater than the width of the corresponding first through hole, so that the first stop portion can drive the first pull plate to bias towards the sliding groove of the first connecting rod, and the first pull plate can drive the first stop portion to move away from the sliding groove of the first connecting rod, thereby enabling the first pull plate to drive the first lock tongue to disengage from the sliding groove of the first connecting rod.

9. The seat back table according to claim 4, wherein, Each of the two second links has a second protrusion at its second end extending toward the corresponding third or fourth side.

10. The seat back table according to claim 9, wherein, Each of the third and fourth sides of the table assembly is provided with a second limiting component, each second limiting component comprising: The second link sliding groove and the second link locking groove are connected to the outer surface of the corresponding third or fourth side of the table assembly. The second link sliding groove is closer to the outer surface of the corresponding third or fourth side than the second link locking groove. Two second through holes are provided between the second link sliding groove and the second link locking groove. The second pull plate is installed into the second connecting rod locking groove; Two second latches, each passing through the second pull plate and a corresponding second through hole, each second latch being mounted to be elastically biased toward the sliding groove of the second connecting rod, each second latch having a third arc surface at one end near a corresponding third or fourth side, the two third arc surfaces facing each other; and The second connecting cable has its first end connected to the second pull plate; Under the traction of the second link cable, the second pull plate can drive the two second locking tongues to disengage from the second link sliding groove, so that the second protrusion at the second end of the second link can slide within the second link sliding groove; Without the traction of the second link cable, each second latch passes through the corresponding second through hole and is fixed in the second link sliding groove under the action of elastic force, so that the second protrusion at the second end of the second link can be limited between one of the two second latches and the side wall of the second link sliding groove.

11. The seat back table according to claim 10, wherein, The two second locking tongues are integrated with the second pull plate.

12. The seat back table according to claim 10, wherein, The second pull plate is provided with a second through hole corresponding to the second through hole, and the second lock tongue is provided with a second stop part. The width of the second stop part is greater than the width of the corresponding second through hole, so that the second stop part can drive the second pull plate to bias towards the sliding groove of the second connecting rod, and the second pull plate can drive the second stop part to move away from the sliding groove of the second connecting rod, thereby enabling the second pull plate to drive the second lock tongue to disengage from the sliding groove of the second connecting rod.

13. The seat back table according to claim 6, wherein, The seat back table further includes: A first unlocking handle is pivotally mounted to the middle of the second side of the table assembly, and the first unlocking handle is connected to the second end of the first linkage cable; The first unlocking handle can pull the first link cable while rotating, so that the first pull plate can drive the two first locking tongues to disengage from the first link sliding groove, thereby allowing the first protrusion at the second end of the first link to slide within the first link sliding groove.

14. The seat back table according to claim 10, wherein, The seat back table further includes: A second unlocking handle is pivotally mounted to the middle of a first side portion of the table assembly, and the second unlocking handle is connected to a second end of the connecting cable and a second end of the second linkage cable. The second unlocking handle can pull the connecting cable while rotating, so that the locking pin can disengage from the first mounting hole of the first extension plate, thereby allowing the first side of the table assembly to disengage from the first extension plate. The second unlocking handle can pull the second linkage cable while rotating, so that the second pull plate can drive the two second locking tongues to disengage from the second linkage sliding groove, thereby allowing the second protrusion at the second end of the second linkage to slide within the second linkage sliding groove.

15. A vehicle, characterized in that, It is equipped with a seat back table as described in any one of claims 1-14.

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