Table plate assembly, seat and vehicle interior trim part

Abstract

The invention relates to a table board assembly, which is characterized by comprising a fixed seat, a table board and a table board, a pivot arm; a table board; the transmission assembly is provided with a first transmission mechanism and a second transmission mechanism, the transmission assembly is electrically driven through the first transmission mechanism, and the pivoting arm can conduct pivoting movement between the folding position and the vertical position of the pivoting arm relative to the fixing base so that the table plate assembly can move between the folding position and the vertical position of the table plate assembly; the table plate is electrically driven by a second transmission mechanism and can do pivoting movement between the vertical position and the horizontal position of the table plate relative to the pivoting arm, so that the table plate assembly can move between the vertical position and the flat turning position, in the opening movement of the table plate assembly, the pivoting movement of the pivoting arm is carried out before the pivoting movement of the table plate, and in the opening movement of the table plate assembly, the pivoting movement of the pivoting arm is carried out before the pivoting movement of the table plate. In the closing movement of the table plate assembly, the pivoting movement of the pivoting arm is performed after the pivoting movement of the table plate. The invention also relates to a seat and a vehicle interior trim part.

Description

Technical Field

[0001] This invention relates to a table assembly, a seat, and a vehicle interior component. Background Technology

[0002] There is a known type of seat table that requires the occupant to manually open and close it from the seat storage space, or to retract it into the seat storage space, which is inconvenient to operate.

[0003] Another type of seat table is known, which is electrically opened and closed. However, the process of the table pivoting out of the seat storage space and the process of the table being flattened are linked or combined. This opening process, which is achieved through two combined movements, has the problem of collision with the occupants due to its arc-shaped movement trajectory. In addition, the table cannot be manually raised in an emergency, which delays the golden time for escape. Summary of the Invention

[0004] The purpose of this invention is to provide a table assembly, a seat, and a vehicle interior trim that can solve at least one of the aforementioned problems.

[0005] To achieve the above objectives, the present invention provides a tabletop assembly, characterized in that the tabletop assembly comprises:

[0006] A mounting bracket, used to secure the tabletop assembly;

[0007] A pivot arm, which is pivotally hinged to a fixed base;

[0008] Tabletop, said tabletop being pivotally hinged to a pivot arm; and

[0009] A transmission assembly, electrically driven, enables the tabletop assembly to perform an opening movement from its stowed position, through an upright position to a usable flat position, and a closing movement from its flat position, through an upright position to its stowed position.

[0010] The transmission assembly includes a first transmission mechanism and a second transmission mechanism.

[0011] Specifically, driven electrically by the first transmission mechanism, the pivot arm can pivot relative to the fixed base between a retracted position and a vertical position, thereby enabling the table assembly to move between its retracted and upright positions. Furthermore, driven electrically by the second transmission mechanism, the tabletop can pivot relative to the pivot arm between its vertical and horizontal positions, thereby enabling the table assembly to move between its upright and flattened positions.

[0012] Specifically, during the opening movement of the table assembly, the pivoting movement of the pivot arm relative to the fixed seat occurs before the pivoting movement of the table relative to the pivot arm; during the closing movement of the table assembly, the pivoting movement of the pivot arm relative to the fixed seat occurs after the pivoting movement of the table relative to the pivot arm.

[0013] The opening and closing processes of the table assembly of the present invention are each divided into two sub-motion processes, which can be electrically driven by two transmission mechanisms to be completed automatically, making it easy to operate and sophisticated. In addition, the two sub-motion processes are completed sequentially without generating compound motion, thus enabling the table to bypass the occupant during the entire opening or closing process without colliding with them.

[0014] Advantageously, the first transmission mechanism and the second transmission mechanism are electrically driven by the same drive assembly.

[0015] This saves on expensive motors and reduces the required layout space.

[0016] Advantageously, the first transmission mechanism is configured to switch between a connected state and a disengaged state. When the first transmission mechanism is in the connected state, it can drive the pivot arm to pivot relative to the fixed base between a retracted position and a vertical position. When the first transmission mechanism is in the disengaged state, it can prevent the pivot arm from pivoting relative to the fixed base.

[0017] By switching between the connected and disconnected states through the first transmission mechanism, the pivot arm can be pivoted to the desired position, and at the desired position, not only can the drive be stopped, but also any unwanted further pivoting of the pivot arm can be prevented.

[0018] Advantageously, the first transmission mechanism includes a first gear set, the drive assembly is driven to the first gear set via an input shaft, and the first gear set is driven to the pivot arm via an output shaft.

[0019] Advantageously, the first gear set has a first gear and a second gear, and the input shaft is drivenly connected to the first gear. The first gear has a toothed tooth segment and a toothless convex arc segment, and the second gear has a toothed tooth segment and a toothless concave arc segment. When the tooth segments of the first gear and the tooth segments of the second gear mesh with each other, the first transmission mechanism is in a connected state; when the convex arc segment of the first gear engages with the concave arc segment of the second gear, the first transmission mechanism is in a disengaged state.

[0020] Here, during the meshing of the teeth of the first gear and the second gear, the first gear set normally drives the transmission to allow the pivot arm to pivot between its retracted and vertical positions. During the engagement of the convex arc segment of the first gear and the concave arc segment of the second gear, the two tooth segments disengage, thus stopping the pivot arm's movement. Simultaneously, the engagement of the convex and concave arc segments locks the second gear, preventing undesirable forward or backward movement of the pivot arm and the table when the table is subjected to forward or backward external forces. This is especially important when the table is in a horizontal position and being used by the occupant, as the occupant does not want the table to move back and forth and become unstable.

[0021] Advantageously, the second transmission mechanism includes a second gear set having a first gear, and the input shaft is also drivenly connected to the first gear of the second gear set.

[0022] Advantageously, the first gear set and the second gear set have the same transmission ratio.

[0023] Advantageously, the second gear set has a second gear, the second gear of the second gear set being provided with an engagement assist pin, and the second gear of the first gear set being provided with an engagement assist groove. During the closing movement of the table assembly, during the pivoting movement of the table relative to the pivot arm from its horizontal position to its vertical position, the engagement assist pin slides in the engagement assist groove. After the table reaches its vertical position, the engagement assist pin, due to being stopped by the engagement assist groove, drives the second gear of the first gear set to engage with its first gear, thereby switching the first transmission mechanism from a disengaged state to a connected state.

[0024] Therefore, the combination of the engagement assist pin and the engagement assist groove can achieve the following effect: during the closing movement, the first gear and the stationary second gear that assist the rotation of the external gear set can smoothly engage and start to rotate together, thereby driving the pivot arm to move to its retracted position.

[0025] Advantageously, the second transmission mechanism includes a link, one end of which is pivotally hinged to a tabletop and the other end of which is slidably hinged to a pivot arm. Sliding the other end of the link away from the tabletop allows the tabletop to pivot relative to the pivot arm from its vertical position to its horizontal position; sliding the other end of the link towards the tabletop allows the tabletop to pivot relative to the pivot arm from its horizontal position to its vertical position.

[0026] This cleverly utilizes a linkage to achieve the pivoting motion of the table relative to the pivot arm between its vertical and horizontal positions.

[0027] Advantageously, the second transmission mechanism includes a first slider, the other end of which is pivotally hinged to the first slider, the first slider being housed in a pivot arm and capable of sliding along the pivot arm.

[0028] This cleverly utilizes a crank-slider mechanism to achieve the pivoting motion of the table relative to the pivot arm between its vertical and horizontal positions.

[0029] Advantageously, an elastic element is provided between the tabletop and the connecting rod, the elastic element being configured to apply force to the connecting rod with its return force to drive the other end of the connecting rod to slide away from the tabletop, so that the tabletop can pivot from its vertical position to its horizontal position under the action of gravity; and, by sliding the other end of the connecting rod towards the tabletop, the elastic element can be compressed towards the tabletop by the connecting rod to store energy.

[0030] Therefore, in the upright position, after the other end of the connecting rod is released from below, the elastic element in a stored state automatically disengages the connecting rod from its dead position, allowing the weight of the tabletop to automatically push the connecting rod downwards. The use of this elastic element enables the tabletop assembly to open completely automatically.

[0031] Advantageously, the elastic element is configured as a spring sheet, which is fixed to the tabletop with its fixed section and forms an acute angle with the tabletop with its active section in the free state.

[0032] Here, the sheet-like spring itself can have a relatively thin thickness, and when it is compressed by the connecting rod, the connecting rod can be set closer to the tabletop in parallel.

[0033] Advantageously, the second transmission mechanism includes a second slider housed in a pivot arm and slidable along the pivot arm, wherein the second slider abuts against the other end of the connecting rod, and when the second slider is electrically driven to slide toward the tabletop, it pushes the other end of the connecting rod to slide together; when the second slider slides away from the tabletop, the other end of the connecting rod slides downward following the second slider under the return force of the elastic element and / or the gravity of the tabletop;

[0034] Alternatively, the second transmission mechanism includes a first slider and a second slider, the other end of the connecting rod being pivotally hinged to the first slider. The first and second sliders are housed in a pivot arm and are slidable along the pivot arm. The second slider abuts against the first slider. When the second slider is electrically driven to slide towards the tabletop, it pushes the first slider to slide together. When the second slider slides away from the tabletop, the first slider slides downward following the second slider under the return force of the elastic element and / or the gravity of the tabletop.

[0035] Here, the speed and position of the pivoting motion of the table relative to the pivot arm from its vertical position to its horizontal position are controlled by using the second slider to control the other end of the link (e.g., in the absence of the first slider) or by the downward sliding of the first slider.

[0036] Advantageously, when the tabletop is pushed relative to the pivot arm from its horizontal position to its vertical position by an external force, the other end of the link or the first slider slides upward away from the second slider while the second slider remains stationary.

[0037] This is highly advantageous because, in the event of an emergency requiring occupants to evacuate their seats, instead of the slower electrically driven tray table flipping to an upright position, occupants can manually and quickly flip the tray table from a horizontal to an vertical position for rapid escape. Therefore, the tray table assembly is additionally endowed with an emergency escape function. In this context, "external force" can refer to manually applied force or impact force during a collision, but not the driving force of the drive motor.

[0038] Advantageously, the second transmission mechanism includes a rack connected to the second slider, and the second transmission mechanism also includes a second gear set, wherein the rack is meshed with a gear in the second gear set and is therefore driven by the second gear set to move, thereby driving the second slider to slide.

[0039] The gear-rack structure is used here to precisely control the sliding stroke of the second slider.

[0040] Advantageously, the table assembly includes a drive assembly having a drive motor, the drive assembly being capable of electrically driving the transmission assembly.

[0041] Here, the drive components can be supplied together as part of the tabletop assembly (i.e., manufactured and sold).

[0042] To achieve the above objectives, the present invention also proposes a seat, characterized in that the seat has a table assembly according to the present invention and has a storage space, the table assembly being fixed in the storage space via its mounting base, wherein, in the retracted position of the table assembly, the table assembly is retracted into the storage space.

[0043] Advantageously, the seat is a vehicle seat, and the storage space is located in the armrest of the vehicle seat, wherein, in the flat position of the table assembly, the table of the table assembly is located in front of the seated occupant.

[0044] To achieve the above objectives, the present invention also proposes a vehicle interior trim, characterized in that the vehicle interior trim has a table assembly according to the present invention and has a storage space, the table assembly being fixed in the storage space via its mounting base, wherein, in the retracted position of the table assembly, the table assembly is retracted into the storage space. Attached Figure Description

[0045] The invention will now be explained in more detail with reference to the accompanying drawings and embodiments, but the invention is not limited to the embodiments described in the drawings and detailed below. The drawings are as follows:

[0046] Figures 1a to 1c The table assembly integrated into the seat according to the present invention is shown in the folded-up position, the upright position, and the flat position.

[0047] Figure 2a and Figure 2b The tabletop assembly of the present invention is shown in perspective view and exploded view, respectively.

[0048] Figure 3 The drive assembly and gear set of the tabletop assembly of the present invention are shown in an exploded view.

[0049] Figure 4 The input shaft of the gear set of the present invention is shown in a perspective view;

[0050] Figure 5 The output shaft of the gear set of the present invention is shown in a perspective view;

[0051] Figure 6 A partial 3D view shows the state of the output shaft before it is installed into the pivot arm;

[0052] Figure 7 The core gear of the gear set is shown in an exploded view;

[0053] Figure 8a and Figure 8b The table assembly of the present invention in the stowed position is shown in a perspective view and a partially disassembled partial side view, respectively.

[0054] Figure 9a and Figure 9b The table assembly of the present invention in the intermediate position between the folded position and the upright position is shown in a partially disassembled partial side view and a partial perspective view, respectively.

[0055] Figure 10a and Figure 10b The table assembly of the present invention in the upright position is shown in a perspective view and a partially disassembled partial side view, respectively;

[0056] Figure 10c Show Figure 10bA cross-sectional view of the tabletop assembly at section line AA;

[0057] Figure 10d The partial perspective view of the table assembly of the present invention in the upright position shows the inner and outer gear sets. Here, it can be seen that the convex arc segment of the first gear of the outer gear set and the concave arc segment of the second gear are in an engaged state.

[0058] Figure 10e The table assembly of the present invention in the upright position is shown in a partially disassembled partial side view, which shows the rotation direction of each gear of the internal gear set and the movement direction of the rack when the opening movement continues.

[0059] Figure 11a and Figure 11b The table assembly of the present invention in the intermediate position between the upright position and the flattened position is shown in a partially disassembled partial side view and partial perspective view, respectively.

[0060] Figure 12a and Figure 12b The table assembly of the present invention in the flattened position is shown in a perspective view and a partially disassembled partial side view, respectively.

[0061] Figure 12c Show Figure 12b A cross-sectional view of the tabletop assembly at section line BB;

[0062] Figure 12d The partial perspective view of the table assembly of the present invention in the flattened position shows the inner and outer gear sets. Here, it can be seen that the convex arc segment of the first gear of the outer gear set and the concave arc segment of the second gear are in an engaged state.

[0063] Figure 12e The table assembly of the present invention in the flattened position is shown in a partially disassembled partial side view, which shows the rotation direction of each gear of the internal gear set and the movement direction of the rack during the closing movement.

[0064] Figure 13a and Figure 13b The table assembly of the present invention is shown in a partially disassembled perspective view and a partial side view, respectively, demonstrating the manual quick-erecting function of the table assembly in the event of an emergency escape by the occupants.

[0065] Figure 13c Show Figure 13b A cross-sectional view of the tabletop assembly at section line CC;

[0066] Figure 14 A first variation of an embodiment of the gear set of the present invention is shown; and

[0067] Figure 15 A second variation of an embodiment of the gear set of the present invention is shown. Detailed Implementation

[0068] The following describes illustrative embodiments of the invention. In this specification, various systems, structures, and devices are schematically depicted in the accompanying drawings for illustrative purposes only, and not all features of actual systems, structures, and devices are described. For example, well-known functions or structures are not described in detail to avoid unnecessary detail that could obscure the invention. It should be understood that in any practical application, many specific implementation decisions need to be made to achieve the specific goals of the developer or user, and system-related and industry-related limitations need to be followed. These specific goals may vary depending on the practical application. Furthermore, it should be understood that while such implementation decisions are complex and time-consuming, they are routine tasks for those skilled in the art who will benefit from this invention.

[0069] The terms and phrases used herein should be understood and interpreted in accordance with the understanding of those skilled in the art. The consistent use of terms or phrases herein is not intended to imply a specific definition, i.e., a definition different from the common and conventional meaning understood by those skilled in the art. For terms or phrases intended to have a specific meaning, i.e., a meaning different from that understood by those skilled in the art, such specific definition will be explicitly listed in the specification, giving the specific definition of the term or phrase directly and unambiguously.

[0070] Unless otherwise required by the content, throughout the following description, the word “including” and its variations, such as “comprising” and “having”, will be interpreted in an open-ended, inclusive sense, that is, as “including but not limited to”.

[0071] See this application Figures 1a to 3 The table assembly 1 of the present invention can be integrated into the seat 2, specifically into the storage space 3 of the seat 2. Here, the seat 2 has a floor armrest to provide the storage space 3. The seat 2 can be a vehicle seat 2 installed in a vehicle. However, the seat 2 can also be used in other modes of transportation such as high-speed trains, airplanes, and ships, or directly as furniture, such as a sofa, as long as the seat 1 can provide a storage space 5 to accommodate the table assembly 1. Furthermore, the table assembly 1 of the present invention can also be integrated into vehicle interior components with storage space 5, such as the center console or door, as long as the table assembly 1 is usable by passengers when opened.

[0072] The descriptions of "left", "right", "front" and "rear" in the following text are based on the occupant's normal sitting position in seat 2. "Left" and "right" refer to the occupant's left and right sides, while "front" and "rear" refer to the occupant's front and rear sides.

[0073] Figure 1a The table assembly 1 is shown in its stowed position. At this time, the table assembly 1 is completely closed into the storage space 5 of the floor armrest 3 and is covered from the top by the flip cover 4 and is not visible. Figure 1b The tabletop assembly 1 is shown in its upright position. The tabletop assembly 1 can be pivoted from its stowed state or stowed position in the storage space 5. Figure 1b The shown upright state or upright position means that during this process, the flip cover 4 can be directly opened by the table assembly 1 or flipped open by the pivot of the table assembly 1 through the linkage mechanism. Figure 1c This shows the flattened position (i.e., the usage position) of the tabletop assembly 1. The tabletop assembly 1 can be flipped up from its position... Figure 1b The upright state, or rather the upright position, is entered through pivoting. Figure 1c The table assembly 1 is shown in a horizontally oriented, flattened state or position, at which point it can be used by the occupants.

[0074] Figure 2a The table assembly 1 of the present invention is shown in a schematic perspective view in its stowed position. Figure 2b A schematic exploded diagram is shown. Figure 2a Tabletop assembly 1.

[0075] See Figure 2a and Figure 2b The table assembly 1 may include a mounting base 6 for fixing to the storage space 5 of the seat 2. The mounting base 6 may be vertically oriented. The mounting base 6 may be constructed in two parts, namely, a long mounting base portion 601 and a short mounting base portion 602 connected to the upper part of the long mounting base portion 601. The long mounting base portion 601 and the short mounting base portion 602 may face each other to form a receiving groove 603, and each has a pivot hole 604 arranged concentrically with each other.

[0076] The tabletop assembly 1 may include a pivot arm 7 pivotally hinged to a fixed base 6. Specifically, the pivot arm 7 has its front end section 701 embedded in a receiving groove 603 of the fixed base 6, and two pivot shafts 702 respectively disposed on both sides of the front end section 701 can be rotatably inserted into two pivot holes 604. The fixed base 6 is configured in two parts to facilitate the connection between the pivot arm 7 and the fixed base 6. The pivot arm 7 can be in a horizontal state relative to the fixed base 6 ( Figure 8a ) and vertical state ( Figure 10a Pivoting between ) to achieve the tabletop assembly 1 in the stowed position ( Figure 8a ) and the position of standing ( Figure 10aThe pivot arm 7 has an elongated receiving groove 703 on one side, in which a front slider 8 (configured as the second slider in this embodiment) and a rear slider 9 (configured as the first slider in this embodiment) can be received and guided to slide within the receiving groove 703. For this purpose, the two sliders 8 and 9 are respectively provided with guide pins 10 fixed laterally (four for the front slider 8 and two for the rear slider 9). These guide pins 10 are guided in guide grooves 12 provided on the upper and lower sides of the receiving groove 703 via bushings 11. A pivot pin 901 is provided at the rear end of the rear slider 9. The pivot pin 901 extends from the upper and lower sides of the rear slider 9 and is also guided in guide grooves 12 via bushings 11. A connecting rod 13 is pivotally hinged to the rear slider 9 via the pivot pin 901 at its front end. Alternatively, it is conceivable to omit the rear slider 9 and instead, the connecting rod 13 is directly pivotally guided in guide grooves 12 at its front end (e.g., also via guide pins 10). The front slider 8 is fixedly connected to the rack 14 at its front. The rack 14 has a generally L-shaped shape and includes a horizontal toothed section 141 and a vertical connecting section 412. The connecting section 412 is connected to the front slider 8 on one hand by its rearwardly extending lug, and on the other hand, its rear side can abut against the entire front slider 8. Thus, the rack 14 can push or pull the front slider 8 to slide in the receiving groove 703, and the front slider 8 can push the rear slider 9 (the front end of the connecting rod 13 in the absence of the rear slider 9) to slide together in the receiving groove 703, or be pulled away from the rear slider 9 to allow the rear slider 9 (the front end of the connecting rod 13 in the absence of the rear slider 9) to slide toward the front slider 8. Furthermore, the receiving groove 703 can be laterally closed by the side plate 704, but the side plate 704 has a slot 705 for the connecting rod 13 to pass through.

[0077] The tabletop assembly 1 may include a tabletop 15 pivotally hinged to a pivot arm 7. Specifically, the tabletop 15 has a tabletop body 151, on which a boss 152 is provided on its unused side (oriented downwards in the use state). The front end of the boss 152 extends forward from the tabletop body 151 and is hinged to the rear end of the pivot arm 7 via a pivot axis (not shown), thereby allowing the tabletop 15 to be in its vertical state relative to the pivot arm 7. Figure 10a ) and horizontal state ( Figure 12a Pivoting between ) to achieve the tabletop assembly 1 in the upright position ( Figure 10a ) and flattening position ( Figure 12aPivoting between the two. A groove 153 is provided in the boss 152, and a resilient spring 16, such as a steel sheet, is fixed in the groove 153. The spring 16 has a rear fixed section 161 and a front actuating section 162. The spring 16 is fixed to the bottom of the groove 153 by three screws (not shown) with its fixed section 161, and the actuating section 162 forms an acute angle with the fixed section 161, or the bottom of the groove 153, in its uncompressed free state, and is therefore away from the bottom of the groove 153. The aforementioned connecting rod 13 is received in the groove 153 at its rear end and is hinged to the boss 152 via a pivot pin 17.

[0078] Here, the table 15, connecting rod 13, rear slider 9, and pivot arm 7 together constitute a so-called crank-slider mechanism, wherein the table 15 is equivalent to the crank in the mechanism, the connecting rod 13 is equivalent to the connecting rod in the mechanism, the rear slider 9 is equivalent to the slider in the mechanism, and the pivot arm 7 is equivalent to the frame in the mechanism. Here, when the table 15 is not pivoting relative to the pivot arm 7, refer to the retracted position of the table assembly 1 (…). Figure 8a ), vertical position ( Figure 10a ) and the intermediate position between the two ( Figure 9a The tabletop 15 is coplanar with the pivot arm 7, and the connecting rod 13 is oriented parallel to the bottom of the groove 153, thus pressing the working section 162 of the spring 16 against the bottom of the groove 153, thereby storing energy in the spring 16, or its working section 162. Figure 10c The stored spring 16 can apply a preload force away from the table 15 and the connecting rod 13. When the front slider 8 is released, or rather, when it is not against the rear slider 9 (the front end of the connecting rod 13 if the rear slider 9 is omitted), this preload force can pivot the table 15 relative to the pivot arm 7. After the table 15 has pivoted a certain angle relative to the pivot arm 7, see, for example, the flattened position of the table assembly 1 (…). Figure 12a The connecting rod 13 has pivoted away from the spring 16 and the working section 162 of the spring 16 is in the released state. Figure 12c In place of spring 16, other elastic elements can be considered, such as compression springs or elastomers.

[0079] The tabletop assembly 1 may include a drive assembly 18 with a drive motor and a gear mechanism 19 that can be driven by it. The gear mechanism 19 may be fixed to and driven by the drive assembly 18 at the rear end, and may be fixed to the mounting base 6 at the front end.

[0080] Figure 3An exploded view of the drive assembly 18 and the gear set mechanism 19 is shown. The gear set mechanism 19 includes a housing with an inner shell 191 and an outer shell 192, and two gear sets disposed within the housing, namely the inner gear set 193 on the left (configured as the second gear set in this embodiment) and the outer gear set 194 on the right (configured as the first gear set in this embodiment). Each gear set 193, 194 includes multiple gears AD, EH connected in series in all four cases, with each pair of corresponding gears AD, EH in the two gear sets 193, 194 arranged side by side. The drive assembly 18 is connected to the two gear sets 193, 194 via an input shaft 195 to transmit torque.

[0081] Figure 4 The individual input shaft 195 is shown in a perspective view. Here, the input shaft 195 has a splined section a that meshes with the drive assembly 18 to transmit torque; a circular inner support section b rotatably supported in the inner housing 191; a drive section c that is non-rotatably connected to the two leftmost first gears A and E of the two gear sets 193 and 194 and the spacer 196 between them; and a circular outer support section d rotatably supported in the outer housing 192. The input shaft 195 can always synchronously drive the two first gears A and E (also referred to as input gears). For this purpose, the drive section c is designed as a prismatic section, here a square column section, and the two first gears A and E each have a matching prismatic bore, here a square bore.

[0082] The two leftmost second gears B and F (also called idler gears) of the two gear sets 193 and 194 are connected by a first intermediate shaft 197. The two leftmost third gears C and G (also called idler gears) of the two gear sets 193 and 194 are connected by a second intermediate shaft 198. The two leftmost fourth gears D and H (also called output gears) of the two gear sets 193 and 194 are connected by an output shaft 199. Specifically, the two intermediate shafts 197 and 198 and the output shaft 199 are rotatably supported in the inner shell 191 and the outer shell 192, respectively. They are non-rotatably connected to the second, third, and fourth gears F, G, and H of the outer gear set 194, respectively, but rotatably connected to the second, third, and fourth gears B, C, and D of the inner gear set 193, respectively. Therefore, the second, third, and fourth gears B, C, and D of the internal gear set 193 and the second, third, and fourth gears F, G, and H of the external gear set 194 rotate independently of each other, without being synchronously driven by the corresponding shafts 197, 198, and 199.

[0083] Figure 5The individual output shaft 199 is shown in a perspective view. As can be seen, the output shaft 199 has a square section e that meshes with the pivot arm 7 to transmit torque, a circular inner support section f that is rotatably supported in the inner housing 191 and the fourth gear D of the internal gear set 193, a square section g that is non-rotatably meshed with the fourth gear H of the external gear set 194, and a circular outer support section h that is rotatably supported in the outer housing 192. Therefore, the output shaft 199 can be driven to rotate when the fourth gear H (external output gear) of the external gear set 194 rotates. Figure 6 The diagram shows the fourth gear H of the external gear set 194 and the output shaft 199 before they are non-rotatably connected to the pivot arm 7. Here, the output shaft 199 can be inserted into the square hole 7021 of the pivot shaft 702 on one side of the pivot arm 7 with its square section e-shaped locking. Thus, when the fourth gear H of the external gear set 194 rotates, it can drive the pivot arm 7 to pivot relative to the fixed base 6 via the output shaft 199.

[0084] Additionally, the fourth gear D (internal output gear) of the internal gear set 193 meshes with the rack 14 (see, for example, see...). Figure 10d and Figure 10e Therefore, the table assembly 1, for example, is from... Figure 10b The vertical position shown is towards Figure 12b When the device moves to the flattened position as shown, the rotation of the fourth gear D of the internal gear set 193 can drive the rack 14 to translate.

[0085] Figure 7 The diagram shows two core gears A, B, E, and F of each of the internal gear set 193 and the external gear set 194, namely the first and second gears A and B of the internal gear set 193, and the first and second gears E and F of the external gear set 194. The first and second gears A and B of the internal gear set 193 are both toothed on their entire circumference; therefore, they rotate together based on constant tooth meshing and gear transmission. The first gear E of the external gear set 194 has a toothed segment E1 and a toothless convex arc segment E2 on its circumference, the outer periphery of which coincides with the addendum circle of the first gear E. The second gear F of the external gear set 194 has a toothed segment F1, a toothless concave arc segment F2, and a toothless convex arc segment F3 on its circumference. The outer periphery of the convex arc segment F3 of the second gear F coincides with the addendum circle of the second gear F. The convex arc segment E2 of the first gear E of the external gear set 194 is designed to be longer than the concave arc segment F2 of the second gear F, and the two can engage with each other, that is, abut against each other in a form-fitting manner, and the convex arc segment E2 can slide relative to the concave arc segment F2. Specifically, when the tooth segments E1 and F1 are meshed with each other (at which time the external gear set 194 is in the connected state), the first gear E of the external gear set 194 can drive the second gear F to rotate together when it rotates (from... Figure 8b The collapsible position to Figure 10b (in the upright position), until each tooth segment E1 and F1 disengages from the gear mesh. After disengagement or simultaneously, the convex arc segment E2 of the first gear E engages with the concave arc segment F2 of the second gear F ( Figure 10b (In the upright position), if the first gear E continues to rotate, its convex arc segment E2 slides within the concave arc segment F2 of the second gear F, but can no longer drive the second gear F to rotate together (from the vertical position). Figure 10b The vertical position to Figure 12b (At this time, the external gear set 194 is in the disengaged state).

[0086] Furthermore, when the convex arc segment E2 of the first gear E engages with the concave arc segment F2 of the second gear F, the second gear F is locked by the first gear E and cannot rotate because the concave arc segment F2 of the second gear F cannot actively slide along the convex arc segment E2 of the first gear E. This is particularly advantageous because, in the state where the pivot arm 7 is in the vertical position (it has pivoted out of the storage space 3 with the table 15), the second gear F is locked based on the engagement of the convex arc segment E2 of the first gear E with the concave arc segment F2 of the second gear F. Thus, when the table 15 is subjected to a forward or backward external force, the pivot arm 7 is prohibited from driving the second gear F to rotate in the opposite direction through the output shaft 199, the fourth gear H, and the third gear G, that is, unwanted forward and backward movement of the pivot arm 7 and the table 15 is prohibited.

[0087] See also Figure 7 The second gear B of the internal gear set 193 is eccentrically fixed with a meshing auxiliary pin B0, so the meshing auxiliary pin B0 can rotate with the rotation of the second gear B. The second gear F of the external gear set 194 is provided with a meshing auxiliary groove F0, into which the meshing auxiliary pin B0 can be inserted. Figure 8b In the retracted position shown, the engagement assist pin B0 is located at the left end of the engagement assist groove F0; from Figure 8b The collapsible position shown is towards Figure 10b During the vertical movement shown, because the two second gears B and F rotate together, the engagement auxiliary pin B0 is always located at the left end of the engagement auxiliary groove F0; when moving from... Figure 10b The vertical position shown is towards Figure 12b During the flattening position movement shown, due to the rotation of the second gear B of the internal gear set 193 and the stationary position of the second gear F of the external gear set 194, the engagement auxiliary pin B0 slides from the left end to the right end of the engagement auxiliary groove F0. During the reverse closing movement of the table assembly 1, as the table assembly 1 moves from... Figure 10b The vertical position shown is in the middle Figure 8bWhen the gear moves to the retracted position as shown, the engagement assist pin B0, located at the left end of the engagement assist groove F0, begins to drive the second gear F of the external gear set 194 to rotate. This causes the first gear E and the second gear F of the external gear set 194 to re-engage, allowing the first gear E to drive the second gear F to rotate, and the external gear set 194 to resume operation. Therefore, the combination of the engagement assist pin B0 and the engagement assist groove F0 ensures that, during the closing movement, the rotating first gear E and the stationary second gear F of the external gear set 194 smoothly engage and begin to rotate together.

[0088] The first and second gears A and B of the internal gear set 193 are responsible for driving the rack 14 to move during the movement of the table assembly 1 between the upright position and the flat position, so as to achieve this movement of the table assembly 1, which will be described in detail below when describing the movement process. Therefore, the transmission mechanism that realizes the movement of the table assembly 1 between the upright position and the flat position, that is, the pivoting movement of the table 15 relative to the pivot arm 7 between the vertical position and the horizontal position, may include the internal gear set 193, the rack 14, the front and rear sliders 8 and 9, and the connecting rod 13.

[0089] The first and second gears E and F of the external gear set 194 are responsible for driving the table assembly 1 to move between the retracted position and the upright position, which will be described in detail below when describing the movement process. Therefore, the transmission mechanism that realizes the movement of the table assembly 1 between the retracted position and the upright position, that is, the pivoting movement of the pivot arm 7 relative to the fixed base 6 between the retracted position (in this case, the horizontal position) and the vertical position, may include the external gear set 194.

[0090] The following uses Figures 8a to 12e The electric opening process of the table assembly 1 from its stowed position to its upright position and finally to its flat position is illustrated by example, as well as the electric retraction process in the reverse direction.

[0091] Figure 8a and Figure 8b The table assembly 1 is shown in its stowed position. In the stowed position, the table assembly 1 is concealed within the storage space 3 of the seat 2 (not shown) and is therefore not visible. See also Figure 8a The pivot arm 7 and the tabletop 15 are coplanar (or at an angle of 0° or 180° relative to each other). The pivot arm 7 is horizontally oriented or in its retracted position, while the tabletop 15, or its tabletop, is vertically oriented or in its vertical position. See also... Figure 8bThe first and second gears E and F of the external gear set 194 mesh with each other; the meshing auxiliary pin B0 on ​​the second gear B of the internal gear set 193 is located at the left end of the meshing auxiliary groove F0 on the second gear F of the external gear set 194; the fourth gear D of the internal gear set 193 meshes with the right end of the rack 14; the front slider 8 and the rear slider 9 (the front end of the connecting rod 13 when the rear slider 9 is omitted, in which case the "rear slider 9" mentioned later can be replaced by "the front end of the connecting rod 13", which will not be described again) abut against each other and are located at the left end of the receiving groove 703; the connecting rod 13 is oriented parallel to the table 15 and squeezes the spring 16 into the energy storage state.

[0092] See Figure 8b As indicated by the arrows, when the drive table assembly 1 begins to open, the drive motor drives the first gears A and E of the internal gear set 193 and the external gear set 194 to rotate counterclockwise via the input shaft 195. The two first gears A and E then drive the two second gears B and F to rotate clockwise, and the two second gears B and F drive the two third gears C and G to rotate counterclockwise. The two third gears C and G then drive the two fourth gears D and H to rotate clockwise. Subsequently, the clockwise rotating fourth gear H of the external gear set 194 drives the pivot arm 7, along with the table 15, to begin rotating clockwise relative to the fixed base 6 via the output shaft 199.

[0093] Next, the tabletop assembly 1 opens. Figure 9a and Figure 9b The location shown Figure 9a and Figure 9b The tabletop assembly 1 is shown in an intermediate position between the folded and upright positions. In the intermediate position, see... Figure 9a The pivot arm 7 and the tabletop 15 remain coplanar, with the pivot arm 7 tilted in orientation, while the tabletop 15, or its surface, remains vertically oriented or in its vertical position; see also Figure 9bThe first and second gears E and F of the external gear set 194 are still meshed with each other; the meshing auxiliary pin B0 on ​​the second gear B of the internal gear set 193 is still located at the left end of the meshing auxiliary groove F0 on the second gear F of the external gear set 194, because the two second gears B and F, and therefore the meshing auxiliary pin B0 and the meshing auxiliary groove F0 move synchronously; the fourth gear D of the internal gear set 193 is still meshed with the right end teeth of the rack 14, and the two do not move relative to each other, because the fourth gear H of the external gear set 194 drives the pivot to rotate. Arm 7 rotates synchronously with the fourth gear D of the internal gear set 193 at the same angular velocity (here, for example, it is set that the first gears A and E of the internal gear set 193 and the external gear set 194 have the same angular velocity, and the transmission ratio of the internal gear set 193 and the external gear set 194 is also the same); the front slider 8 and the rear slider 9 abut against each other and remain at the left end of the receiving groove 703 because the rack 14 remains stationary relative to the pivot arm 7; the connecting rod 13 remains parallel to the table 15 and compresses the spring 16 into an energy storage state.

[0094] Next, the tabletop assembly 1 opens. Figures 10a to 10e The location shown Figures 10a to 10e This shows the upright position of the tabletop assembly 1. See also the diagram for the upright position. Figures 10a to 10c The pivot arm 7 and the tabletop 15 remain coplanar, with the pivot arm 7 vertically oriented or in its vertical position, and the tabletop 15, or its table surface, remaining vertically oriented or in its vertical position; see also Figures 10b to 10d The first and second gears E and F of the external gear set 194 are just disengaged. The convex arc segment E2 of the first gear E engages with the concave arc segment F2 of the second gear F. As a result, the second gear F will not only not be driven by the first gear E, but its rotation will also be prohibited by the first gear E due to the engagement of the convex arc segment E2 and the concave arc segment F2. This prevents the pivot arm 7 and the table 15 from undesirably pivoting forward or backward when subjected to a forward or backward external force (such as an external force inadvertently applied by the occupant). The engagement auxiliary pin B0 on ​​the second gear B of the internal gear set 193 is still located at the left end of the engagement auxiliary groove F0 on the second gear F of the external gear set 194. This is because the two second gears B and F, and therefore the engagement auxiliary pin B0 and engagement auxiliary groove F0, have been moving synchronously. The fourth gear D of the internal gear set 193 is still meshing with the right end tooth of the rack 14, and the two have not moved relative to each other. This is because the fourth gear H of the external gear set 194 has been driving the pivot arm 7 to rotate synchronously with the fourth gear D of the internal gear set 193 at the same angular velocity. The front slider 8 and the rear slider 9 are abutting each other and are still located at the left end (here, the upper end) of the receiving groove 703. This is because the rack 14 has been kept stationary relative to the pivot arm 7. The connecting rod 13 is still oriented parallel to the table 15 and squeezes the spring 16 into the energy storage state.

[0095] exist Figure 10e The external gear set 194 is omitted; only the internal gear set 193 is shown. See also... Figure 10e As indicated by the arrow, when the table assembly 1 continues to open, the drive motor, via input shaft 195, continues to drive the first gears A and E of the internal gear set 193 and external gear set 194 to rotate counterclockwise. However, the first gear E of the external gear set 194, having disengaged from the second gear F, no longer drives the second gear F to rotate. Instead, the convex arc segment E2 on the first gear E slides within the concave arc segment F2 on the second gear F. Therefore, the pivot arm 7 no longer pivots. The internal gear set 193 continues to operate normally; that is, the first gear A of the internal gear set 193 drives the second gear B to rotate clockwise, the second gear B drives the third gear C to rotate counterclockwise, and the third gear C drives the fourth gear D to rotate clockwise. Subsequently, the clockwise rotation of the fourth gear D in the internal gear set 193 drives the rack 14 to begin a downward translational movement relative to the pivot arm 7. The downward translational movement of the rack 14 causes the front slider 8 (now the lower slider) to move downward, thereby releasing the rear slider 9 (now the upper slider) from below. The spring 16, in its stored state, pushes the connecting rod 13 and the table 15 away from each other slightly when the rear slider 9 is released. This causes the table 15 to pivot slightly horizontally relative to the pivot arm 7. Simultaneously, the connecting rod 13 pivots away from the table 15 and the pivot arm 7, forming a small angle with them. The rear slider 9 is pressed downward by the connecting rod 13 and moves downward a small distance. As a result, the center of gravity of the table 15 shifts away from the plane where the pivot arm 7 is located, and the gravity of the table 15 can then consistently exert a downward thrust on the rear slider 9 via the connecting rod 13. As long as the front slider 8 moves downward, the rear slider 9 can follow downward based on the gravity of the table 15 itself, but its speed is always controlled by the front slider 8. In simple terms, in the upright position, after the front slider 8 releases the rear slider 9 from below, the spring 16, which is in a stored state, automatically disengages the crank-connecting rod mechanism from its dead-point position. In this dead-point position, the table 15, connecting rod 13, and pivot arm 7 are coplanar and vertically oriented, and the center of gravity of the table 15 lies in this common plane. Of course, it is conceivable that, instead of the spring 16, the table 15 can also be manually pushed slightly towards its horizontal position to deviate its center of gravity, thus moving it away from the dead-point position. Afterward, the gravity of the table 15 can automatically push the connecting rod 13 and the rear slider 9 downward. The use of the spring 16 here allows the opening process of the table assembly 1 to be completely automated.

[0096] Next, the tabletop assembly 1 opens. Figure 11a and Figure 11b The location shown Figure 11a and Figure 11bThe diagram shows an intermediate position of the tabletop assembly 1 between the upright and tilted positions. In this intermediate position, the pivot arm 7 remains vertical, or in its vertical position, and the tabletop 15 is at an obtuse angle to the pivot arm 7, meaning the tabletop 15, or its table surface, is tilted. The first and second gears E and F of the external gear set 194 are disengaged. The convex arc segment E2 of the first gear E has slid a certain distance along the concave arc segment F2 of the second gear F. The rotation of the second gear F is still prohibited by the first gear E due to the engagement of the convex arc segment E2 and the concave arc segment F2, thus preventing the pivot arm 7, together with the tabletop 15, from undesirably pivoting forward or backward when subjected to a forward or backward external force. The engagement auxiliary pin on the second gear B of the internal gear set 193... B0 has slid to an intermediate position relative to the meshing auxiliary groove F0 on the second gear F of the external gear set 194. This is because the second gear B of the internal gear set 193 continues to drive the meshing auxiliary pin B0 to rotate, while the second gear F of the external gear set 194 remains stationary. The fourth gear D of the internal gear set 193 has driven the rack 14 to move downward a certain distance. The front slider 8 and the rear slider 9 are still against each other but have moved downward a certain distance. This is because the rack 14 drives the front slider 8 to move downward, while the rear slider 9 moves downward synchronously based on the gravity of the table 15. The connecting rod 13 is at an angle relative to the table 15, and the spring 16 is in the released state.

[0097] Next, the tabletop assembly 1 opens. Figures 12a to 12e The location shown Figures 12a to 12eThe tabletop assembly 1 is shown in its flattened position. In the flattened position, the pivot arm 7 remains vertically oriented, or in its vertical position, and forms an angle of approximately 90 degrees with the tabletop 15. The tabletop 15, or its table surface, is therefore horizontally oriented, or in its horizontal position, and thus in a usable state for occupants. The first and second gears E and F of the external gear set 194 remain disengaged. The convex arc segment E2 of the first gear E has slid to its maximum distance along the concave arc segment F2 of the second gear F but remains engaged. The rotation of the second gear F is still prohibited by the first gear E due to the engagement of the convex arc segment E2 and the concave arc segment F2, thus preventing the pivot arm 7, together with the tabletop 15, from undesirably pivoting forward or backward when subjected to a forward or backward external force. The first gear E of the internal gear set 193... The engagement auxiliary pin B0 on ​​the second gear B has slid to the right end relative to the engagement auxiliary groove F0 on the second gear F of the external gear set 194. This is because the second gear B of the internal gear set 193 continues to drive the engagement auxiliary pin B0 to rotate, while the second gear F of the external gear set 194 remains stationary. The fourth gear D of the internal gear set 193 has driven the rack 14 to move downwards to the maximum distance and engage with its upper end (left end). The front slider 8 and the rear slider 9 are still against each other but have moved downwards to the maximum distance. This is because the rack 14 drives the front slider 8 to continue moving downwards, while the rear slider continues to follow the downward movement based on the gravity of the table 15. The connecting rod 13 is at its maximum angle relative to the table 15. The spring 16 is still in the released state.

[0098] Thus, the tabletop assembly 1 completes the opening process from the folded position through the upright position to the flat position.

[0099] The closing motion of the table assembly 1 from the flat position through the upright position to the folded position is the opposite of the opening motion described above, and will be briefly described below.

[0100] exist Figure 12e The external gear set 194 is omitted; only the internal gear set 193 is shown. See also... Figure 12eAs indicated by the arrows, when the table assembly 1, currently in the flat position, is moved to its upright position, the drive motor, via input shaft 195, begins to drive the first gears A and E of the internal gear set 193 and the external gear set 194 to rotate clockwise. The first gear A of the internal gear set 193 drives the second gear B to rotate counterclockwise, which in turn drives the third gear C to rotate clockwise. The third gear G drives the fourth gear H to rotate counterclockwise. Subsequently, the counterclockwise rotating fourth gear D of the internal gear set 193 drives the rack 14 to begin an upward translational movement relative to the pivot arm 7. This upward translational movement of the rack 14 causes the front slider 8 (now the lower slider) to move upward, and the front slider 8 pushes the rear slider 9 (now the upper slider) upward from below. The rear slider 9, through the connecting rod 13, pushes the table 15 to overcome the weight of the table 15 (and the elastic force of the spring piece 16 in the final stage) and pivots upward relative to the pivot arm 7 until the table 15 is pushed to the vertical position (the connecting rod 13 then squeezes the spring piece 16 to the energy storage position), thus realizing the electric drive of the table assembly 1 from the flat position to the vertical position. During this period, the first gear E of the external gear set 194 cannot drive the second gear F to rotate because it is disengaged from the second gear F. Instead, the convex arc segment E2 on the first gear E slides in the opposite direction in the concave arc segment F2 on the second gear F, so the pivot arm 7 does not pivot. The meshing auxiliary pin B0 on ​​the second gear B of the internal gear set 193 slides in the opposite direction relative to the meshing auxiliary groove F0 on the second gear F of the external gear set 194 to the left end. This is because the second gear B of the internal gear set 193 drives the meshing auxiliary pin B0 to rotate in the opposite direction, while the second gear F of the external gear set 194 remains stationary.

[0101] Next, the tabletop assembly 1, which was in the upright position, continues to retract to its closed position, while the drive motor continues to drive the two first gears A and E to move clockwise. (See previous sections for more details.) Figure 10b The first gear E of the external gear set 194, which is about to mesh with the teeth of the second gear F, continues to rotate clockwise. The meshing auxiliary pin B0, which is already at the left end of the meshing auxiliary groove F0, rotates counterclockwise and begins to drive the second gear F of the external gear set 194 to rotate counterclockwise. Thus, the first gear E and the second gear F of the external gear set 194 smoothly enter the meshing state and begin to drive the fourth gear H to rotate counterclockwise via the third gear G. The fourth gear H drives the pivot arm 7 to pivot counterclockwise through the output shaft 199 to the horizontal retracted position of the pivot arm 7, that is, the table assembly 1 enters its retracted position. Figure 8a The collapsible position is shown.

[0102] This completes the entire closing motion of the tabletop assembly 1, from the flat position through the upright position to the folded position.

[0103] Figures 13a to 13cThe emergency escape function of the table assembly 1 is shown. In normal use, the horizontally oriented table 15 is typically positioned directly in front of the occupant for ease of use. However, this, in turn, hinders the occupant's emergency exit from the seat 2 because the electric lifting speed of the table 15 to a vertical position is relatively slow for emergency escape. In the event of a sudden incident requiring an emergency exit from the seat 2, the table 15 of this invention can be manually flipped from a horizontal to a vertical position by the occupant, allowing for a rapid exit from the seat 2. Specifically, see... Figure 13a As indicated by the arrow, the occupants can manually apply an external force, or thrust P, to the table 15, which can be quickly pushed upwards. Figure 13b and 13c The vertical position is shown. During this process, the tabletop 15 drives the rear slider 9 to move rapidly upward via the connecting rod 13, but the front slider 8 and the two gear sets 193 and 194 do not participate in this movement and remain stationary. Therefore, the rapid upward manual pivoting movement of the tabletop 15 is completely decoupled from the gear mechanism 19 and is not mechanically hindered by it.

[0104] Figure 14 A first variation of the gear mechanism 19 described above is shown. Compared to Figure 3 In the embodiment of the internal and external gear sets 193 and 194 shown, in this first variation, the two third gears C and G are omitted, and instead, the two second gears B and F directly mesh with the two fourth gears D and H, respectively. Correspondingly, during the opening of the tabletop 15, the two first gears A and E are driven to rotate clockwise (see arrow direction), and during its retraction, the two first gears A and E are driven to rotate counterclockwise, which is exactly the opposite of the rotation direction in the previous embodiment. Furthermore, since a pair of gears C and G is omitted, the length of the two gear sets 193 and 194 is correspondingly shortened. This is suitable for cases with smaller drive motors, i.e., it provides space for arranging a smaller drive motor.

[0105] Figure 15 A second variation of the gear mechanism 19 described above is shown. Compared to Figure 3In the embodiment of the internal and external gear sets 194 shown, this second variation retains only two pairs of core gear sets, namely the first and second gears A, B, E, and F of the internal and external gear sets 193 and 194, while omitting the third and fourth gears C, D, G, and H of the internal and external gear sets 193 and 194. Correspondingly, the second gear F of the external gear set 194 is torque-transmittingly connected to the pivot arm 7 via the output shaft 199, and the second gear B of the internal gear set 193 meshes with the rack 14. Accordingly, during the opening of the tabletop 15, the two first gears A and E are driven to rotate counterclockwise (see arrow direction), and during its retraction, the two first gears A and E are driven to rotate clockwise, the same direction of rotation as in the previous embodiment. Furthermore, due to the reduction of two pairs of gears, the lengths of the two gear sets 193 and 194 are correspondingly shorter, which is suitable for smaller drive motors, i.e., it allows for the provision of space for a smaller drive motor.

[0106] In other words, the number of gear sets can be increased arbitrarily in addition to the core gear set, so as to provide sufficient setting space for the drive component 18.

[0107] Finally, it should be noted that the above embodiments are merely for understanding and explaining the present invention, and do not constitute a limitation on the scope of protection of the present invention. Those skilled in the art can make modifications or recombinations based on the above embodiments, without departing from the scope of protection of the present invention.

Claims

1. A tabletop assembly, characterized in that, The table assembly includes: A mounting bracket, used to secure the tabletop assembly; A pivot arm, which is pivotally hinged to a fixed base; Tabletop, said tabletop being pivotally hinged to a pivot arm; and A transmission assembly, electrically driven, enables the tabletop assembly to perform an opening movement from its stowed position, through an upright position to a usable flat position, and a closing movement from its flat position, through an upright position to its stowed position. The transmission assembly includes a first transmission mechanism and a second transmission mechanism. Specifically, driven electrically by the first transmission mechanism, the pivot arm can pivot relative to the fixed base between a retracted position and a vertical position, thereby enabling the table assembly to move between its retracted and upright positions. Furthermore, driven electrically by the second transmission mechanism, the tabletop can pivot relative to the pivot arm between its vertical and horizontal positions, thereby enabling the table assembly to move between its upright and flattened positions. Specifically, during the opening movement of the table assembly, the pivoting movement of the pivot arm relative to the fixed seat occurs before the pivoting movement of the table relative to the pivot arm; during the closing movement of the table assembly, the pivoting movement of the pivot arm relative to the fixed seat occurs after the pivoting movement of the table relative to the pivot arm.

2. The tabletop assembly according to claim 1, characterized in that, The first transmission mechanism and the second transmission mechanism are electrically driven by the same drive component.

3. The tabletop assembly according to claim 2, characterized in that, The first transmission mechanism is configured to switch between a connected state and a disconnected state. When the first transmission mechanism is in the connected state, it can drive the pivot arm to pivot relative to the fixed base between the retracted position and the vertical position of the pivot arm. When the first transmission mechanism is in the disconnected state, it can prevent the pivot arm from pivoting relative to the fixed base.

4. The tabletop assembly according to claim 3, characterized in that, The first transmission mechanism includes a first gear set, the drive assembly is driven to the first gear set via an input shaft, and the first gear set is driven to the pivot arm via an output shaft.

5. The tabletop assembly according to claim 4, characterized in that, The first gear set has a first gear and a second gear. The input shaft is drivenly connected to the first gear. The first gear has a toothed tooth segment and a toothless convex arc segment. The second gear has a toothed tooth segment and a toothless concave arc segment. When the tooth segments of the first gear and the tooth segments of the second gear mesh with each other, the first transmission mechanism is in a connected state. When the convex arc segment of the first gear engages with the concave arc segment of the second gear, the first transmission mechanism is in a disengaged state.

6. The tabletop assembly according to claim 5, characterized in that, The second transmission mechanism includes a second gear set, which has a first gear, and the input shaft is also drivenly connected to the first gear of the second gear set.

7. The tabletop assembly according to claim 6, characterized in that, The first gear set and the second gear set have the same transmission ratio.

8. The tabletop assembly according to claim 6, characterized in that, The second gear set has a second gear, and the second gear of the second gear set is provided with a meshing auxiliary pin. The second gear of the first gear set is provided with a meshing auxiliary groove. During the closing movement of the table assembly, during the pivoting movement of the table relative to the pivot arm from its horizontal position to its vertical position, the meshing auxiliary pin slides in the meshing auxiliary groove. After the table reaches its vertical position, the meshing auxiliary pin is stopped by the meshing auxiliary groove, which drives the second gear of the first gear set to engage with its first gear, so that the first transmission mechanism switches from the disengaged state to the engaged state.

9. A type of seat, characterized in that, The seat has a table assembly according to any one of claims 1 to 8 and has a storage space, the table assembly being fixed in the storage space via its mounting base, wherein, in the retracted position, the table assembly is retracted into the storage space.

10. A vehicle interior trim component, characterized in that, The vehicle interior trim has a table assembly according to any one of claims 1 to 8 and has a storage space, the table assembly being fixed in the storage space via its mounting base, wherein, in the retracted position, the table assembly is retracted into the storage space.

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