Tray table for an aircraft passenger seat and an aircraft passenger seat unit

Abstract

The invention relates to a tray table for an aircraft passenger seat and to an aircraft passenger seat unit. The tray table (100) comprises an expandable panel (10), a first support (20) to which the panel is hinged, and an engagement member (40) for fastening in a seat environment, said table comprising a second support (30) on which the first support (20) is mounted in a slidable manner along a translation direction (T) parallel to the plane of the panel; said second support (30) is mounted in a slidable manner on the engagement member (40) along the same translation direction (T), so that said supports can be expanded in a telescopic manner; the panel (10) is mounted in a rotatable manner on the first support (20) about an axis of rotation (R) perpendicular to the plane of the panel; the sliding movement of the supports (20, 30) and the rotational movement of the panel (10) are coupled, so that said panel performs a progressive and automatic rotation during its expansion and its retraction.

Description

Technical Field

[0001] This invention relates to the field of aircraft cabin interior accessories, particularly deployable tray tables. More specifically, this invention relates to tray tables that can be deployed through a combination of translational-rotational movements, thereby allowing for a reduction in their overall size.

[0002] This invention is directly, but not exclusively, applied to passenger seats in the premium cabins (business class and first class) of commercial aircraft. Background Technology

[0003] Since the advent of commercial aviation, aircraft cabin interior components have been a major challenge in enhancing passenger comfort and experience, especially in business and first class. A key feature in improving this comfort is the tray table, which provides a stable surface for passengers to eat, work, or relax during flight. Initially, the tray table was simply integrated into the back of the seat in front of the passenger. In this classic configuration, the table could be folded back from a vertical, stowed position to a horizontal one for use. However, this solution has significant ergonomic limitations, particularly because it depends on the angle of the seat back: if the backrest is too reclined, the usable space for comfortable use of the table is significantly reduced.

[0004] To address these limitations, second-generation tray tables have emerged, directly integrated into the seats or adjacent side consoles. In this case, the table typically retracts and unfolds in an armrest or a console specifically designed for this purpose. These tables are usually retrieved via pivoting or linear translational movement, guided to their final passenger-facing position by a hinge mechanism. However, these solutions introduce other significant challenges. On one hand, they often involve complex mechanisms, including multiple hinges or guide rails, potentially leading to high manufacturing and maintenance costs. On the other hand, due to the size constraints imposed by the limited space in the cabin, longitudinally stored tables typically have a narrow and elongated shape when unfolded. This narrow and deep geometry is uncomfortable for passengers, as it restricts the working width in front of them, thus reducing comfort when eating or working.

[0005] Furthermore, when tray tables are unfolded, they often obstruct the space in front of passengers, forcing them to fully stow the table before they can leave their seats to go to the aisle or other parts of the cabin. This is particularly disadvantageous on long-haul flights, where passengers frequently need to use the restroom, stretch their legs, or simply interact with other cabin crew. Additionally, the repetitive and strenuous movement required to stow the table before leaving the seat can be perceived as annoying by passengers, especially when these movements must be performed frequently.

[0006] These technical and ergonomic shortcomings, widely recognized by experts in aircraft cabin interior components, have been the subject of various solution attempts. For example, some devices known in the prior art offer combined rotation or translation mechanisms to make the table more ergonomic when unfolded. However, despite these improvements, these systems are generally still bulky, require more space than necessary, and still present passengers with annoyed operating conditions. A thorough examination of current solutions further confirms that existing mechanisms do not allow passengers to leave their seats without first folding the tray table, or at least make it extremely difficult.

[0007] Therefore, despite these attempts to improve the configuration and use of tray tables, no known solution offers a satisfactory compromise that combines optimal ergonomic use, maximum compactness of the stowage mechanism, and complete freedom of movement for passengers when they wish to leave their seats with the table in the extended position. Thus, current technology awaits a solution that simultaneously addresses these limitations and delivers a significantly improved passenger experience in terms of user comfort, convenience, and optimal integration with the limited space available on commercial aircraft. Summary of the Invention

[0008] The present invention aims to overcome all or some of the disadvantages of the prior art by providing an innovative solution, optimizing the ergonomics of the tray table while reducing its overall size.

[0009] Therefore, one object of the present invention is an aircraft passenger seat tray table comprising: an deployable panel forming an operating surface for a passenger; a first support to which the panel is hinged; and a coupling for securing the table to a seat environment. A significant feature of this tray table is that it includes a second support, the first support being slidably mounted on the second support along a translational direction parallel to a plane of the panel; the second support being slidably mounted on the coupling along the same translational direction, such that the support can be deployed in a retractable manner; the panel being rotatably mounted on the first support about a rotation axis perpendicular to a plane of the panel; and the sliding movement of the support and the rotational movement of the panel being coupled, such that the panel performs a gradual and automatic rotation during its deployment and retraction.

[0010] According to one aspect of the invention, the table has a stowed position and a fully extended position, in which the board is stored integrally and longitudinally under the connecting member, and in the fully extended position, the board is placed laterally in front of the seat.

[0011] According to one aspect of the invention, the table also has an intermediate position in which the board is partially extended along an inclination direction relative to the seat, the board leaving a distance relative to the seat sufficient to allow passengers to exit from both the left and right sides depending on the location of the exit passage.

[0012] According to one embodiment, the first support member is slidably mounted inside the second support member, which is therefore nestable.

[0013] According to one embodiment, the first support includes a receiving plate and is configured to raise the plate to an end above the second support and below the coupling.

[0014] According to one embodiment, the coupling includes a sliding track for a second support member on its lower surface.

[0015] More specifically, the track is inclined relative to the longitudinal direction of the coupling to increase the stroke of the second support.

[0016] According to one embodiment, the table includes an actuation mechanism configured to ensure simultaneous sliding of a first support and a second support, as well as synchronous and progressive rotation of the plate. The mechanism includes a first pinion connected to the plate and mounted in a notched first belt connected to the first support, the notched first belt sliding on a cam connected to the second support. The second support includes a second belt that translately drives the first support via a first sliding stage. The second belt itself is translated by a second pinion of the second support engaging a rack of a connecting member, the second pinion driving the second support via a second sliding stage.

[0017] Advantageously, the cam has curvature that defines the path of the first belt and the trajectory of the plate.

[0018] Another object of the present invention is an aircraft passenger seat unit comprising a seat and a tray table as described, mounted in front of the seat.

[0019] The basic concept of the invention has been set forth above in its most basic form, and other details and features will become clearer when reading the following description and referring to the accompanying drawings, which, by way of non-limiting example, illustrate embodiments of a tray table according to the principles of the invention. Attached Figure Description

[0020] The accompanying drawings are provided merely to illustrate the invention and to better understand it, and are not intended to limit the scope of the invention. Different elements may be shown schematically and are not necessarily drawn to scale. In all the drawings, the same or equivalent elements have the same reference numerals.

[0021] Therefore, it is illustrated in the following figures:

[0022] - Figure 1 : A perspective view of a tray table in its fully extended position according to an embodiment of the present invention;

[0023] - Figure 2 Another perspective view of the tray table from below;

[0024] - Figure 3 A three-dimensional bottom view of the tray table in its stowed position;

[0025] - Figure 4 Isometric views of the tray table in the stowed position (a), in the semi-open position (b) to allow sufficient distance for passengers to leave, and in the fully open position (c);

[0026] - Figure 5 Top view of the tray table in the previous three positions;

[0027] - Figure 6 The simplified kinematic scheme of the tray table in these three previous positions;

[0028] - Figure 7 : A top view showing the trajectory of the tray table as it unfolds or retracts, with different consecutive positions of the tray. Detailed Implementation

[0029] In the embodiments described below, referring to the aircraft passenger seat tray table, passengers are allowed to use the useful surface of the table to eat their meals or place personal belongings. This table is primarily used for passenger seats in premium cabins (business and first class).

[0030] In the context of this invention, the term "tray table" or simply "table" refers to a functional component formed by the plate itself, which constitutes a useful surface for receiving objects such as trays, electronic devices, or personal belongings of passengers, and all mechanical actuation elements configured to enable the table to be folded up and unfolded, including fastening couplings for ensuring the table is integrated into the passenger seating environment. This functional component forms a coherent and automated system.

[0031] Figure 1A tray table 100 for a passenger seat in its fully extended position is shown, thus allowing precise observation of the constituent elements and their mechanical interactions. The tray table 100 includes: a plate 10; a first support 20 on which the plate is rotatably mounted; a second support 30 cooperating with the first support via a sliding nest; and a fastening coupling 40 on which the second support is slidably mounted, the fastening coupling 40 intended to ensure a mechanical connection between the tray table 100 and a seating environment (not shown) of the tray table 100, such as the space provided in a relative seat for this purpose.

[0032] The panel 10 forms a useful surface intended for receiving, in particular, meals, laptops, or any other personal items, especially those belonging to passengers. The panel has an overall rectangular shape, advantageously rounded at the corners to enhance usability.

[0033] The tray table 10 is rotatably mounted to the first support 20 about a rotation axis R that is substantially perpendicular to the plane of the tray table 100. This feature allows the tray table 10 to pivot in its plane to modify its orientation and provide an ergonomically optimized surface for the passenger when the tray table 100 is fully extended. In practice, this rotation is automatic and occurs gradually during extension via sliding coupling with the supports 20 and 30 until the tray table 10 is positioned in front of the passenger along its length, as... Figure 1 As indicated in the text.

[0034] The first support member 20 has a generally elongated and planar shape, intended to ensure a stable mechanical connection with the plate 10. The first support member 20 is slidably mounted inside the second support member 30 along a translational direction T that extends parallel to the plane of the plate 10 and along the longitudinal direction of the supports 20 and 30, thereby allowing controlled longitudinal extension of the tray table 100 when the tray table 100 moves from its folded position to its unfolded position, and vice versa.

[0035] The second support member 30 constitutes an intermediate structural element in the kinematics of the tray table 100. The second support member 30 has an elongated overall shape and is configured to slidably accommodate the first support member 20 along the translational direction T. Complementarily, the second support member 30 itself is slidably mounted inside the fastening coupling 40 along the same translational direction T.

[0036] Therefore, this double-sliding configuration between support member 20 and support member 30, and between support member 30 and connecting member 40, enables a particularly advantageous telescopic effect, thereby ensuring a stroke that is significantly useful for the tray table 100, while limiting the overall size in the stowed position to a strictly minimum, as will be explained later.

[0037] Finally, the fastening coupling 40 ensures that the tray table 100 is mechanically engaged with the immediate environment surrounding the passenger seat, typically located below the screen opposite the seat in the space provided for this purpose. The fastening coupling 40 includes suitable fastening devices, such as quick-fasteners or any other equivalent device that allows for a secure and stable fastening to the seat environment. The fastening coupling 40 is sized to fully accommodate the plate 10 and the supports 20 and 30 in the retracted position and allows for optimal deployment without disturbing the passenger or negatively impacting the overall aesthetics of the seat.

[0038] Finally, it will be noted that the table 100 includes additional elements in its lower portion, such as a handle 21 integrated with the first support 20, which facilitates the operation of the table 100, and in particular facilitates the easy activation of the table's unfolding and folding kinematics.

[0039] Therefore, the mechanical interactions between these different components of the tray table 100 ensure complex and perfectly controlled kinematics, allowing for efficient combination of rotation and translation to provide passengers with an ergonomically adapted surface while strictly limiting the overall size of the table in the folded position.

[0040] Figure 2 The tray table 100 is shown pointing downwards at different angles to better observe the components of the handle 21 and the sliding mechanism.

[0041] The handle 21, ideally positioned for easy gripping by passengers, has an ergonomic shape, thus allowing for easy and intuitive operation, particularly during the initial phase of unfolding the movement or when the table is folded up.

[0042] Figure 2 The diagram also shows a protruding shape where the first support 20 extends across the entire width of the plate 10 and terminates at an end 22, which raises the tray above the level of the second support 30 and below the level of the coupling 40, allowing the tray to retract between the second support 30 and the coupling 40, as shown. Figure 3 As indicated in the text.

[0043] The sliding fit between the first support member 20 and the second support member 30 is ensured by an internal mechanical guide, which advantageously includes sliding elements that are not visible herein but are arranged inside the supports. This guide ensures smooth sliding while maintaining mechanical rigidity, which is necessary for the stability of the plate 10 under load.

[0044] Still refer to Figure 2The fastening coupling 40 includes an integral sliding track 41 disposed in the lower surface of the fastening coupling 40. The track 41 ensures the guidance of the second support 30 during sliding. These sliding tracks 41 are preferably made of a material with low friction and high wear resistance.

[0045] The sliding track 41 is not strictly parallel to the longitudinal axis of the fastening connector 40, but rather has a slight inclination angle relative to the longitudinal axis of the fastening connector 40. This large diagonal inclination towards the plane of the connector 40 allows for an increase in the effective length of the track 41 without increasing the overall longitudinal dimension of the connector 40, thus providing a longer sliding stroke. The inclination angle of the track 41 is precisely determined to ensure that at the end of the stroke, when the tray table 100 is fully retracted, the plate 10 is completely stored under the connector 40.

[0046] Figure 3 The tray table 100 in its retracted position is shown in a three-dimensional bottom view, allowing a particular observation of how the plate 10 is completely hidden under the fastening coupling 40 after being retracted. As previously described, this compact configuration in the retracted position is made possible by a slight tilt of the sliding track, which ensures that the plate 10 is fully positioned under the coupling 40 when it slides to the final stop of the plate 10.

[0047] In this retracted position, the panel 10 is oriented along its depth, i.e., along its maximum side 11. This particular orientation is directly generated by the specific kinematics of the table 100, wherein, during the retracting movement initiated by the passenger by pushing the handle 21, the rotation of the table 10 about its axis of rotation is automatically coupled to the sliding of the supports 20 and 30. Therefore, the panel 10 gradually pivots during its sliding movement, from... Figure 1 and Figure 2 The usage position, which was located in front of the passenger, is moved to the optimized retracted position below the connector 40.

[0048] Furthermore, the end 22 of the first support member 20 slightly raises the plate 10, thus facilitating the engagement of the plate 10 between the coupling member 40 and the second support member 30, while ensuring sufficient space to comfortably accommodate the thickness of the plate 10 in the retracted position.

[0049] Figure 4 The tray table 100 is shown in three distinct consecutive positions: (a) the stowed position; (b) the middle or half-open position; and (c) the fully open position. These three positions are shown relative to the depicted passenger seat 200.

[0050] In the stowed position (a), the panel 10 is completely concealed beneath the fastening connector 40. In this configuration, the table 100 leaves a maximum space, marked d1, between its edge and the passenger seat 200, thus ensuring ample freedom of movement for passengers to enter or leave.

[0051] The intermediate or semi-extended position indicated in (b) corresponds to a portion of the panel 10 extending outwards. This intermediate extended position is particularly advantageous because it creates a distance d2 between the panel 10 and the passenger seat 200, which is maintained sufficiently to allow passengers to easily exit their seats, regardless of whether the aisle is positioned to the left or right relative to the table 100. Furthermore, in this semi-extended position, the useful surfaces of the panel 10 remain widely accessible, allowing for the comfortable presence of, for example, a tray table or other objects required by the passenger. To ensure that the entire surface of the panel 10 is available in this intermediate position, material removal can advantageously be provided at the level of the fastening joint 40 to avoid obscuring small portions of the panel that are still partially covered, such as... Figure 4 As illustrated in example (b).

[0052] Finally, the fully expanded position indicated in (c) corresponds to the previous reference. Figure 1 and Figure 2 The optimal usage configuration is described. In this final position, the table 100 extends forward toward the passenger as much as possible, thereby leaving a reduced distance d3 between the table 10 and the passenger seat 200 to provide the user with a fully accessible surface under ideal ergonomic conditions for dining, working, or any other comfortable use during flight.

[0053] Therefore, the kinematics of the tray table 100 advantageously provides a particularly useful intermediate configuration that combines sufficient space to allow passengers to leave their seats freely with optimized, accessible, and useful surfaces.

[0054] Figure 5 The three consecutive positions described above are shown in a planar top view in the same frame of reference, intended to clearly explain the different sliding strokes and rotational movements of plate 10.

[0055] In the retracted position (a), the plate 10 is completely hidden within the boundary below the fastening coupling 40. This retracted position is indicated by a dashed line to allow for precise observation of the position of the plate 10 below the coupling 40 and the maximum compactness of the plate 10 when retracted along its maximum size, thus minimizing the required retracted space.

[0056] By moving to the intermediate position (b), the combined path of sliding along direction T and rotating about axis R of plate 10 can be clearly observed, during which plate 10 can move together with the first support member 20. During this intermediate phase of movement, plate 10 gradually pivots relative to the first support member 20 while moving away from its housing located below the coupling member 40.

[0057] Figure 7 This more clearly illustrates how the rotation of the plate is performed gradually while coupled with longitudinal displacement.

[0058] In particular, when the plate 10 is in the middle position, this particular kinematics allows the plate 10 to expose almost all of its useful surfaces while freeing up enough space to allow passengers to disembark.

[0059] Finally, in the fully extended position (c), the plate 10 is oriented parallel to the passenger along its length to provide optimal ergonomics. The two supports 20 and 30 are fully extended during telescopic sliding, clearly showing their respective contributions to the total extension stroke. This plan view clearly illustrates the total length achieved by the telescopic mechanism and highlights the maximum range of motion from the retracted position to the final fully extended position.

[0060] Figure 6 The kinematic schemes of the actuation mechanism of the tray table 100 in the following three consecutive positions previously described in the tray table 100 are shown: the folded position in (a); the intermediate or semi-expanded position in (b); and the fully expanded position in (c).

[0061] It should be noted that the kinematic scheme shown is not drawn to scale. In particular, the retracted position (a) is intentionally shown in an stretched manner to improve the readability of the mechanism. In reality, in this configuration, plate 10 and supports 20 and 30 are largely superimposed below the connecting member 40, which would make understanding the operation quite complicated if the actual scale were respected. Therefore, the sole purpose of this schematic diagram is to highlight the structure and kinematics of the actuation mechanism, regardless of its actual overall dimensions.

[0062] In particular, the actuation mechanism includes two sliding stages guided by dual sliders, the dual sliders being a first slider 354 between the second support 30 and the engagement member 40 and a second slider 254 between the second support 30 and the first support 20. This two-stage configuration ensures maximum compactness of the assembly in the retracted position (a).

[0063] During the unfolding to the intermediate position (b), the table gradually moves away via a first mechanical synchronization system, which includes a fixed rack 451 connected to the engagement member 40, a pinion 351 meshing with the rack, and a notched belt 352 mounted to the pinion 351 and driving the first support member 20. This first system allows the sliding of the two sliding stages 354 and 254 to be controlled according to a law determined by mechanical deceleration present between the pinion 351 and the pulley integral with the belt 352. Thus, for a distance D traveled by the first sliding stage 354, a distance D / n simultaneously traveled by the second stage 254 (where n is typically about 2 in the illustrated example) is reduced, thereby ensuring smooth and coordinated movement of the two supports 20 and 30 during unfolding or retraction.

[0064] Plate 10 is connected to first support 20 via a second synchronization system that ensures controlled rotation of plate 10 during unfolding or retracting movements. This second system includes a pinion 151 rigidly connected to plate 10 and a notched belt 251 connecting pinion 151 to first support 20. Rotation of plate 10, and thus of pinion 151, is controlled by the interaction of belt 251 with a cam 353 fastened to second support 30.

[0065] Therefore, the gradual rotation of the mechanical contact guide plate 10 between the cam 353 and the belt 251 allows the plate 10 to avoid any potential obstacles from the direct environment of the seat, such as doors or the specific curvature of the seat environment, while ensuring precise ergonomic positioning at each deployment step.

[0066] In practice, as the second support 30 moves under the action of the first system, contact or engagement with the cam 353 causes the pinion 151 to gradually rotate via the belt 251. Therefore, as the tray table 100 moves away from (or into), the plate 10 pivots about its axis of rotation. The shape of the cam 353 can be adjusted (by changing its curvature) to precisely regulate the rotational pattern of the plate 10, for example, to avoid any obstacles.

[0067] In the final fully extended position (c), the mechanism reaches its maximum extension, with plate 10 ideally oriented towards the passenger. At this stage, pinion 351 has traveled the entire length of rack 451, corresponding to the second support 30 being fully extended relative to engagement 40, while belt 352 has simultaneously positioned the first support 20 on slide 254 in its final position. Plate 10 has completed its rotation by means of pinion 151 driven by belt 251 interacting with cam 353.

[0068] Therefore, the kinematics of the tray table 100 can be described as follows:

[0069] In the retracted position, plate 10 is completely concealed beneath engagement member 40, with sliders 354 and 254 retracted to their maximum extent. In the closed position, pinion 151 and belt 251 abut against cam 353, with belt 251 wedged in to hold plate 10 in a position parallel to engagement member 40.

[0070] In the intermediate position, the first support member 20 and the second support member 30 have begun their differential sliding motion controlled by the rack 451, pinion 351, and belt 352. Simultaneously, the plate 10 begins to rotate under the action of the pinion 151 and cam 353. A thick, curved arrow indicates the angular trajectory of the plate, while a right arrow indicates the translation of the second support member 30.

[0071] In the fully extended position, slides 354 and 254 have reached their maximum extension, thereby applying their final orientation (generally perpendicular or nearly perpendicular to the engagement member 40) defined by the geometry of cam 353 onto plate 10. The reduction ratio n then results in precise synchronization between the distance traveled by the second support member 30 and the distance traveled by the first support member 20. Plate 10 is in its service position, ready for passenger use.

[0072] Therefore, the actuation mechanism allows for synchronization between the telescopic sliding and rotation of the plate 10, thereby ensuring harmonious and controlled movement between different positions of the table 100. The mechanism is also designed by adjusting parameters such as the curvature of the cam 353 or the reduction ratio n between the pinion 351 and the belt 352 to precisely adapt the final trajectory of the plate to the specific constraints of the seating environment in which the table is located.

[0073] According to an advantageous additional embodiment, the tray table 100 can be combined with a partial pop-out mechanism similar to that used in some drawers, allowing a passenger to slightly move off the table by simply applying slight pressure to it when it is in the stowed position. This pressure automatically releases an internal locking mechanism that throws the tray table 10 forward a short distance. Thus, the passenger can easily grasp the handle 21 to manually extend the table further to the intermediate or fully extended position, significantly improving the ergonomics of the device.

[0074] Furthermore, when the tray table 100 reaches its fully extended position, the mechanical locking system securely prevents the table 10 from rotating, thus ensuring the stability of the table 10 and preventing any unintentional rotation that could obstruct passengers during use. A reverse translation activated by the user only when the user pushes the support 20 to fold up the table allows the lock to be released and the coupled rotation of the tray 10 to automatically return to the folded position.

Claims

1. A tray table (100) for an aircraft passenger seat (200), comprising: An expandable panel (10) forming an operating surface for a passenger; a first support (20) to which the panel is hinged; and a connecting member (40) for securing the table to a seating environment, the table being characterized in that: The table includes a second support member (30), and the first support member (20) is slidably mounted on the second support member (30) along a translational direction (T) parallel to the plane of the plate; The second support member (30) is slidably mounted on the joint member (40) along the same translation direction (T), so that the support member can be extended in a telescopic manner; The plate (10) is rotatably mounted on the first support (20) about a rotation axis (R) perpendicular to the plane of the plate; Furthermore, the sliding motion of the support members (20, 30) and the rotational motion of the plate (10) are coupled, so that the plate performs a gradual and automatic rotation during the unfolding and retraction of the plate.

2. The tray table according to claim 1, characterized in that, The tray table has a stowed position and a fully extended position. In the stowed position, the plate (10) is stowed vertically and entirely below the connector (40). In the fully extended position, the plate (10) is placed horizontally in front of the seat (200).

3. The tray table according to claim 1 or 2, characterized in that, The tray table also has a middle position in which the board (10) is partially extended along an inclined direction relative to the seat (200), the board leaving a distance (d2) relative to the seat sufficient to allow passengers to exit from both the left and right sides depending on the location of the exit passage.

4. The tray table according to any one of the preceding claims, wherein, The first support member (20) is slidably mounted inside the second support member (30), which is therefore nestable.

5. The tray table according to any one of the preceding claims, wherein, The first support (20) includes an end (22) that receives the plate (10) and is configured to raise the plate above the second support (30) and below the joint (40).

6. The tray table according to any one of the preceding claims, wherein, The connector (40) includes a track (41) on its lower surface for sliding the second support (30).

7. The tray table according to claim 6, wherein, The track (41) is inclined relative to the longitudinal direction of the coupling (40) to increase the travel of the second support (30).

8. A tray table according to any one of the preceding claims, comprising an actuation mechanism (151, 251, 254, 351, 352, 353, 354, 451), said actuation mechanism being configured to ensure simultaneous sliding of the first support member (20) and the second support member (20) and synchronous and progressive rotation of the plate (10), said mechanism comprising: A first pinion (151) is connected to the plate and mounted in a notched first belt (251) connected to the first support (20), the notched first belt sliding on a cam (353) connected to the second support (30), the second support including a second belt (352) that translatesly drives the first support (20) via a first sliding stage (254), the second belt itself being translated by a second pinion (351) of the second support (30) engaging with a rack (451) of the engagement member (40), the second pinion driving the second support via a second sliding stage (354).

9. The tray table according to claim 8, wherein, The cam (353) has a curvature that defines the path of the first belt (251) and the trajectory of the plate (10).

10. An aircraft passenger seat unit, comprising a seat (200), and characterized in that, The aircraft passenger seat unit includes a tray table (100) according to any one of the preceding claims, mounted in front of the seat.

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