Electrically-driven folding table plate

Abstract

The invention relates to an electrically-driven folding table plate, and belongs to the technical field of vehicle seat accessory equipment. The structure comprises an upper table plate assembly, a lower table plate assembly, a table plate support, an electric transmission system, a transmission shaft, a left connecting rod system, a right connecting rod system, a connecting rod installation support, a torsion spring assembly and an installation support. The electric transmission system drives the transmission shaft to rotate after being decelerated through a multi-stage gear and a worm, the transmission shaft drives the left and right connecting rods to cooperatively act, and automatic turning opening and closing of the table board are achieved. The left and right torsion springs are used for providing pre-tightening torque, eliminating connecting rod gaps and improving structural stability. The structure has the advantages of being accurate in electric control, synchronous in overturning, convenient to install, high in modularization integration level and the like, and is suitable for seat systems of airplanes, high-speed rails, passenger cars and the like.

Description

Technical Field

[0001] The present invention relates to the field of accessory devices for vehicle seats, and more particularly to an electrically driven folding table board. Background Art

[0002] In the field of modern transportation means, especially in airplanes, high-speed trains, intercity buses and high-class business vehicles, in order to improve the passenger experience, foldable small table boards are generally provided on the seat backs for passengers to perform operations such as reading, working, and dining during the journey. The structures of traditional small table boards are mostly manually foldable, that is, the table board is rotated from the vertical state to the horizontal state or retracted in the reverse direction manually, and their structures usually rely on simple rotating shafts, buckles or friction dampers to achieve support and positioning.

[0003] However, such traditional structures generally have the following technical limitations:

[0004] 1. Complicated operation and easy to wear: Manual opening and closing requires passengers to operate repeatedly with force, there are problems such as inconvenient operation and limited posture, and hinges and buckles are easily worn during long-term use, affecting their reliability;

[0005] 2. Easy to increase the structural gap and obvious shaking: Due to positioning relying on simple rotating shafts and fixed structures, gaps will be generated at the connecting parts of the connecting rods after long-term use, resulting in phenomena such as shaking and tilting of the table board during use, affecting the user experience and safety;

[0006] 3. Lack of synchronous control design and uncoordinated movement: Some structures are controlled only by unilateral connecting rods during flipping, resulting in unbalanced movement, angle deviation, and even deformation under external interference;

[0007] 4. Single transmission scheme and lack of automation support: Most of the existing structures do not have the ability of electric control, and it is difficult to meet the requirements of intelligent seat systems in high-end transportation equipment for automatic opening and closing and precise control;

[0008] 5. Not conducive to integration and maintenance: The design of traditional small table boards does not consider standardized and modular structures, it is inconvenient to replace components, and the efficiency of seat manufacturers is low during layout and maintenance.

[0009] Although some improved structures introduce electric actuators, due to the lack of scientific deceleration matching and connecting rod synchronization systems, there are still problems such as unstable movement process, insufficient power output, complex structure and difficult maintenance during operation, and often ignore the negative impact of transmission gaps on the stability of the table board.

[0010] Therefore, there is an urgent need in the prior art for a new structure of a small table that has automatic driving ability, a stable link linkage structure, smooth and synchronous movement during operation, and a self-clearing gap function. It can not only meet the requirements of user convenience and stability, but also facilitate the integrated design and later maintenance and upgrade of the product, and adapt to the trend of the intelligent development of vehicle seats. Summary of the Invention

[0011] The present invention aims to solve the problems existing in the small table of the existing seat, such as complex structure, inconvenient operation, serious shaking, and unstable transmission. A compact, stable in motion, electrically driven and automatically flipable small table structure with a gap elimination function is proposed.

[0012] To achieve the above object, the present invention provides the following technical solutions:

[0013] An electrically driven folding table, comprising:

[0014] The upper table plate assembly and the lower table plate assembly together constitute the table plate body;

[0015] The table plate bracket is connected to the lower table plate assembly;

[0016] The electric drive system includes a motor, a first-stage gear set, a first-stage gear set shaft, a second-stage gear, a second-stage worm, and a transmission shaft worm gear;

[0017] The transmission shaft is horizontally arranged and installed on the table plate bracket;

[0018] The left link system includes a first left link and a second left link, wherein the first left link is fixedly connected to the transmission shaft, and the second left link is hingedly connected to the lower table plate assembly;

[0019] The right link system includes a second right link and a first right link, wherein the second right link is fixedly connected to the transmission shaft, and the first right link is hingedly connected to the lower table plate assembly;

[0020] The left link mounting bracket is used to support the first left link;

[0021] The right link mounting bracket is used to support the second right link;

[0022] The left torsion spring has one end connected to the second left link and the other end connected to the upper table plate assembly;

[0023] The right torsion spring has one end connected to the first right link and the other end connected to the upper table plate assembly;

[0024] The left table plate mounting bracket is used to fix the structure to one side of the seat backrest frame;

[0025] The right table plate mounting bracket is used to fix the structure to the other side of the seat backrest frame.

[0026] Preferably, the motor drives the worm gear of the transmission shaft to rotate in sequence through the first-stage gear set, the first-stage gear set shaft, the second-stage gear, and the second-stage worm.

[0027] Preferably, the transmission shaft is connected to the first left connecting rod and the second right connecting rod respectively by key connection or interference fit.

[0028] Preferably, the second left connecting rod and the first right connecting rod are hingedly connected to the lower plate assembly of the table board through a pin shaft.

[0029] Preferably, the left torsion spring and the right torsion spring are torsion springs, which are respectively used to provide pre-tightening torque in the opening direction of the table board to eliminate the clearance of the connecting rod.

[0030] Preferably, the first-stage gear set, the second-stage gear, and the second-stage worm are arranged in the first reduction box housing and the second reduction box housing, and the reduction box is fixedly installed on the table board bracket.

[0031] Preferably, the left mounting bracket of the table board and the right mounting bracket of the table board are respectively mounted on the seat back frame by any one of bolts, buckles, or positioning slots.

[0032] Preferably, the outer surface of the upper plate assembly of the table board is provided with anti-slip strips, cup grooves, or pen recessed areas to improve the use function.

[0033] Preferably, the lower plate assembly of the table board is composed of a metal skeleton and an engineering plastic coating, and has a composite structure with enhanced structural rigidity.

[0034] Preferably, the electric drive system receives control signals through a circuit board connected to the seat control module to realize intelligent linkage control of the table board.

[0035] According to the above technical solutions, compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] 1. Electric drive and automatic operation, improving the convenience of use: By setting a motor and a multi-stage reduction mechanism, the automatic opening and closing of the small table board are realized. Users can operate conveniently through electric control buttons or control systems, avoiding the inconvenience brought by traditional manual folding structures, and are especially suitable for the requirements of automation and intelligent experience in high-end transportation tools.

[0037] 2. Left and right connecting rod linkage mechanism, ensuring synchronous movement and smooth flipping: The present invention forms a linkage system through the symmetrically arranged first left connecting rod, second left connecting rod, first right connecting rod, and second right connecting rod on the left and right, and realizes two-way synchronous movement in cooperation with the transmission shaft, which can effectively prevent the table board from shifting, jamming, or tilting during the opening process, and improve the movement reliability and use safety of the structure.

[0038] 3. Use a torsion spring structure to eliminate gaps and improve structural stability: The present invention is designed with a left torsion spring and a right torsion spring, which are respectively connected between the second left connecting rod and the first right connecting rod and the upper plate assembly of the table plate. The pre-tightening effect of the torsion spring is used to provide continuous elastic force in the opening direction of the table plate, effectively compensating for gap problems caused by mechanical fit, wear or looseness, ensuring that the table plate is free of shaking and trembling in the working state, and significantly improving the product's feel and durability.

[0039] 4. The multi-stage reduction mechanism matches the motor output to improve motion efficiency and control accuracy: The electric transmission system in this structure uses a multi-stage combination of primary gears, secondary gears and worm gears to effectively reduce the motor speed and increase the torque output, ensuring that the small table moves smoothly and softly, and also has good self-locking performance to prevent the table from accidentally falling due to unexpected situations such as power outages.

[0040] 5. Modular Structural Design Enhances Installation and Maintenance Ease: The entire system utilizes independent modular components, including the transmission assembly, connecting rod assembly, torsion spring mechanism, and mounting bracket, ensuring interchangeability and ease of assembly. The transmission system is integrated into the reduction gearbox housing, facilitating centralized maintenance and rapid maintenance, reducing maintenance costs and improving after-sales service efficiency.

[0041] 6. Adaptable to a variety of seat platforms and has broad application prospects: The left-side mounting bracket and the right-side mounting bracket of the table board in the present invention support a variety of installation methods such as bolts, clips or positioning slots, which can be flexibly adjusted according to different seat structures and have strong adaptability. It is particularly suitable for passenger seats in various types of transportation such as cars, high-speed trains, buses, and airplanes, and has broad promotion and industrial application value.

[0042] 7. Compact structure, high aesthetics, and easy product integration: All power and transmission components are centrally arranged inside the table frame or on the back of the backrest, taking up little space and having a simple and elegant overall appearance. This is conducive to improving the integration and aesthetics of the seat product and is in line with the integrated design trend of modern passenger cabin interiors. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0044] Figure 1 It is a structural explosion diagram of the present invention.

[0045] Figure 2This is a schematic structural diagram of the tabletop mounting bracket of the present invention.

[0046] Figure 3 This is a schematic diagram of the motor and transmission structure principle of the present invention.

[0047] Figure 4 This is an enlarged view of part A of the present invention.

[0048] Figure 5 This is a schematic diagram of the torsion spring clearance elimination structure of the present invention.

[0049] 1 - Left mounting bracket of the tabletop; 2 - Upper plate assembly of the tabletop; 3 - Left connecting rod mounting bracket; 4 - Outer shell of the first reduction gearbox; 5 - Left torsion spring; 6 - First left connecting rod; 7 - Second left connecting rod; 8 - Transmission shaft; 9 - Tabletop bracket; 10 - Lower plate assembly of the tabletop; 11 - Second-stage worm; 12 - Second-stage gear; 13 - First-stage gear set; 14 - Shaft of the first-stage gear set; 15 - Transmission shaft worm gear; 16 - Motor; 17 - Outer shell of the second reduction gearbox; 18 - Right connecting rod mounting bracket; 19 - Right torsion spring; 20 - First right connecting rod; 21 - Second right connecting rod; 22 - Right mounting bracket of the tabletop. Detailed implementation manners

[0050] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0051] Embodiment

[0052] In this embodiment, an electrically driven folding tabletop, as shown in Figure 1 and Figure 2 includes: an upper plate assembly 2 of the tabletop, a lower plate assembly 10 of the tabletop, a tabletop bracket 9, an electric drive system, a transmission shaft 8, a left connecting rod system, a right connecting rod system, a left connecting rod mounting bracket 3, a right connecting rod mounting bracket 18, a left torsion spring 5, a right torsion spring 19, a left mounting bracket 1 of the tabletop, and a right mounting bracket 22 of the tabletop.

[0053] The upper plate assembly 2 of the tabletop and the lower plate assembly 10 of the tabletop are combined to form the tabletop body. The upper plate assembly 2 of the tabletop is the surface layer contacted by the user, and its panel can be made of materials such as ABS engineering plastic, aluminum alloy-coated fireproof leather, etc., with characteristics such as light weight, fireproof, and scratch-resistant, and the functional area can be divided by film pasting or laser etching. The lower plate assembly 10 of the tabletop is located below the upper plate, usually formed by stamping steel plates or integrally injection-molded, with good strength, and is used to bear the bending moment generated during the operation of the tabletop.

[0054] The tabletop bracket 9, as the core load-bearing component for the entire transmission and support, adopts a thick-plate steel stamping and welding structure or a high-strength plastic one-piece molding structure. It is fixedly connected to the tabletop lower plate assembly 10 by screws or snaps, and has high-strength connection performance and repeatable assembly ability. The bracket is provided with a drive shaft mounting hole, a motor and a reduction structure mounting position, as well as a plurality of limit and positioning grooves, which are used to ensure the accurate movement track of the transmission components and improve the overall structural coordination and durability.

[0055] As Figure 3 and Figure 4 shown, the electric drive system consists of a motor 16, a first-stage gear set 13, a first-stage gear set shaft 14, a second-stage gear 12, a second-stage worm 11 and a drive shaft worm gear 15. The motor 16 is preferably a brushed DC motor or a permanent magnet stepper motor with low speed and high torque, and can communicate with the control main board to implement various attitude control strategies. The drive system is arranged inside the first reduction box housing 4 and the second reduction box housing 17. The housing material can be made of flame-retardant plastic or aluminum alloy die-casting, which has good structural strength and anti-fatigue performance, and is convenient for modular replacement.

[0056] The drive shaft 8 is transversely arranged inside the tabletop bracket 9 and is used to evenly transmit power to the connecting rod structures on the left and right sides. One end of it is key-connected to the first left connecting rod 6, and the other end is in interference fit with the second right connecting rod 21, ensuring sensitive motion response and high transmission accuracy. To prevent loosening caused by high-frequency vibration, structures such as circlips and lock washers can be added to the shaft ends.

[0057] The left connecting rod system consists of the first left connecting rod 6 and the second left connecting rod 7, and the right connecting rod system consists of the second right connecting rod 21 and the first right connecting rod 20. The four connecting rods form a left-right symmetric structure, and the connection method is: the drive shaft drives the first left connecting rod 6 and the second right connecting rod 21 to rotate; the second left connecting rod 7 and the first right connecting rod 20 are respectively connected to the tabletop lower plate assembly 10 through pin shafts to form hinge pairs, realizing the up-and-down flipping control of the tabletop. All connecting rods can be made of stamping formed steel plates, die-cast aluminum parts or glass fiber reinforced plastics, which are required to reduce weight while maintaining strength and reduce the motor load.

[0058] The left connecting rod mounting bracket 3 and the right connecting rod mounting bracket 18 are the rotating bearing seats for the left and right connecting rods, adopting a double-ear bracket or an L-shaped chute structure, and cooperating with the shaft pin to construct a revolute pair. This bracket is directly fixed on the tabletop bracket 9, which can provide stable rotational support and prevent structural deformation or distortion caused by eccentric force during the movement process.

[0059] As Figure 1 and Figure 5As shown, the left torsion spring 5 and the right torsion spring 19 are respectively arranged between the second left connecting rod 7 and the first right connecting rod 20, and the other ends are connected to the spring mounting holes embedded in the upper plate assembly 2 of the table board. The torsion spring is a high-strength alloy steel spring with an initial angle, and its pre-tightening direction is consistent with the opening direction of the table board flipping. After the table board is opened, it still maintains a continuous torque on the connecting rod, so as to offset the mechanism clearance and improve the structural stability and user feel during use.

[0060] The left mounting bracket 1 of the table board and the right mounting bracket 22 of the table board are responsible for installing the whole set of structures on the inner metal frame of the seat back. The mounting bracket adopts a general slot-type guide rail or snap-fastener design, which is convenient for seat manufacturers to quickly assemble in the general assembly link and is also convenient for later maintenance or replacement. Its connection form can be realized by bolt fastening, chute limiting or spring snap-fastener, and can be flexibly selected according to different seat designs.

[0061] During use, the user can start the table board system through the buttons, capacitive touch or in-vehicle control system interface configured on the armrest or the side of the seat. After the motor 16 is started, the output power is sequentially transmitted to the first-stage gear set 13, the first-stage gear set shaft 14, the second-stage gear 12, the second-stage worm 11, and finally transmitted to the transmission shaft 8 through the transmission shaft worm gear 15 to achieve high-precision low-speed and high-torque output. The rotation of the transmission shaft 8 drives the left and right connecting rod systems to act in coordination, so that the upper plate assembly 2 of the table board slowly flips from the vertical retracted state to the horizontal use state. The duration of the flipping process is about 2-4 seconds, and the action is gentle without impact. The closing process is controlled by the reverse rotation of the motor and can also be smoothly reset.

[0062] To improve the system safety, the following functional modules can be integrated into the electric control system: overcurrent protection, limit detection, obstacle recognition (such as pinch protection), angle sensor feedback, etc. If foreign objects are detected to block or the load is abnormal, the motor will immediately stop running and alarm to prevent pinching or mechanism damage.

[0063] The structure of the present invention also has good modular characteristics. All key components (including the motor, reduction box, connecting rod, torsion spring, table board) are independent components, which are convenient for disassembly and maintenance. It is especially suitable for large-scale seat supporting production scenarios and can quickly complete the assembly line operation. The whole set of structures is highly integrated and easy to install, and is applicable to various high-end transportation seat scenarios, such as economy class / business class seats of airplanes, high-speed rail seats, urban rail train seats, business coach seats, rear seats of driverless taxis, etc.

[0064] In this embodiment, other application forms can also be expanded, for example:

[0065] Add USB charging interfaces, wireless charging areas or notebook fixing structures on the upper plate assembly 2 of the table board;

[0066] Embed the control main board in the structure and connect the CAN or RS485 communication interface to achieve networking control with the whole vehicle / whole train;

[0067] Utilize the space of the table board bracket 9 to arrange the sensor module to achieve seat status recognition or linkage functions (such as automatically retracting the table board during takeoff and approaching the station);

[0068] Combine with the seat pitch electric mechanism for combined control to improve the overall intelligent level of human-machine interaction in the cabin.

[0069] In summary, through the compact and precise structural design, the present invention realizes the multi-objective optimization of stable structural mechanics, gentle electric action, accurate linkage control, and quiet and reliable use process. At the same time, it has good product integration and industrialization adaptability, meeting the comprehensive requirements of the current high-end seating system for safety, comfort, intelligence, and maintainability.

[0070] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and reference can be made to the method part for the relevant parts.

[0071] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electric drive folding table board, characterized in that, Comprising: The upper tabletop assembly (2) and the lower tabletop assembly (10) jointly form the tabletop body; The tabletop bracket (9), which is connected to the lower tabletop assembly (10); The electric drive system, including the motor (16), the first gear set (13), the first gear set shaft (14), the second gear (12), the second worm (11), and the transmission shaft worm gear (15); The transmission shaft (8), which is horizontally arranged and installed on the tabletop bracket (9); The left link system, including the first left link (6) and the second left link (7), wherein the first left link (6) is fixedly connected to the transmission shaft (8), and the second left link (7) is hingedly connected to the lower tabletop assembly (10); The right link system, including the second right link (21) and the first right link (20), wherein the second right link (21) is fixedly connected to the transmission shaft (8), and the first right link (20) is hingedly connected to the lower tabletop assembly (10); The left link mounting bracket (3), which is used to support the first left link (6); The right link mounting bracket (18), which is used to support the second right link (21); The left torsion spring (5), with one end connected to the second left link (7) and the other end connected to the upper tabletop assembly (2); The right torsion spring (19), with one end connected to the first right link (20) and the other end connected to the upper tabletop assembly (2); The left tabletop mounting bracket (1), which is used to fix the structure to one side of the seat back frame; The right tabletop mounting bracket (22), which is used to fix the structure to the other side of the seat back frame.

2. The electric drive folding tabletop according to claim 1, wherein: The motor (16) is sequentially driven through the first gear set (13), the first gear set shaft (14), the second gear (12), and the second worm (11) to drive the transmission shaft worm gear (15) to rotate.

3. The electric drive folding table board according to claim 1, characterized in that: The transmission shaft (8) is connected to the first left link (6) and the second right link (21) respectively by key connection or interference fit.

4. The electric drive folding tabletop according to claim 1, characterized in that: The second left link (7) and the first right link (20) are hingedly connected to the lower tabletop assembly (10) by pins.

5. The electric drive folding table board according to claim 1, characterized in that: The left torsion spring (5) and the right torsion spring (19) are torsion springs, which are respectively used to provide pre-tightening torque in the tabletop opening direction to eliminate the link clearance.

6. The electric drive folding tabletop according to claim 1, wherein: The first gear set (13), the second gear (12), and the second worm (11) are arranged in the first reduction box housing (4) and the second reduction box housing (17), and the reduction box is fixedly installed on the tabletop bracket (9).

7. The electric drive folding table board according to claim 1, characterized in that: The left tabletop mounting bracket (1) and the right tabletop mounting bracket (22) are respectively installed on the seat back frame by any one of bolts, buckles, or positioning slots.

8. The electric drive folding tabletop according to claim 1, wherein: The outer surface of the upper tabletop assembly (2) is provided with anti-slip strips, cup grooves, or pen recessed areas to improve the use function.

9. The electric drive folding tabletop according to claim 1, characterized in that: The lower tabletop assembly (10) is composed of a metal skeleton and engineering plastic coating, and has a composite structure with enhanced structural rigidity.

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