Electric table board assembly and automobile seat

Abstract

The utility model relates to the technical field of electric table plates, and discloses an electric table plate assembly and an automobile seat. The rotating bracket is rotatably arranged on the mounting main body, and a first motor is arranged on the rotating bracket; the table board module is movably arranged on the rotating support and connected with the first motor, the table board module comprises a table board, the table board has an unfolded state and a folded state, and the first motor can drive the table board to be switched between the unfolded state and the folded state; the leveling driving module comprises a second motor, a worm gear and a worm, and the worm is arranged at the output end of the second motor; the worm gear is meshed with the worm and connected with the rotating support, and the worm can drive the worm gear to rotate; when the table board is in the unfolded state, the leveling driving module can adjust the angle of the table board relative to the horizontal plane by driving the rotating support to rotate. The electric table board has the advantages that the electric table board can be leveled in a self-adaptive mode, and during leveling, the movement is stable, the noise is low, the rigidity of the table board is good, and the shaking amount is small.

Description

Technical Field

[0001] The utility model relates to the technical field of table tops, in particular to an electric table top assembly and a car seat. Background Art

[0002] Currently, the small tables mass-produced on the market are mainly manual small tables, and most of the electric small tables are modified parts in the aftermarket.

[0003] To ensure the tabletop returns to a horizontal position after the backrest is adjusted, the tabletop must be adaptively leveled. However, this adaptive leveling is controlled by a single-axis motor, resulting in poor rigidity and prone to instability and wobble. Existing tabletop structures also utilize rack-and-pinion mechanisms and gyroscopes for adaptive leveling. However, these leveling mechanisms suffer from poor stability and high noise levels, as well as low rigidity and load-bearing capacity, making them prone to wobble or wiggle. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an electric table top assembly and a car seat which have good stability, low noise and small table top shaking when leveling the table top.

[0005] The technical solution adopted by the present invention to solve the technical problem is to propose an electric table assembly, comprising:

[0006] Install the main body;

[0007] A rotating bracket is rotatably arranged on the mounting body, and a first motor is provided on the rotating bracket;

[0008] a table top module, movably disposed on the rotating bracket and connected to the first motor, the table top module including a table top having an unfolded state and a folded state, the first motor being capable of driving the table top to switch between the unfolded state and the folded state;

[0009] A leveling drive module includes a second motor, a worm gear, and a worm, wherein the second motor is disposed on the mounting body; the worm gear is disposed at an output end of the second motor; the worm gear is engaged with the worm gear and connected to the rotating bracket, and the worm gear can drive the worm gear to rotate;

[0010] When the table top is in the unfolded state, the leveling drive module can adjust the angle of the table top relative to the horizontal plane by driving the rotating bracket to rotate.

[0011] Furthermore, the worm and the worm wheel form a worm-gear mechanism, and the worm-gear mechanism satisfies a reverse self-locking condition, wherein the worm can drive the worm wheel to rotate, but the worm wheel cannot drive the worm to rotate.

[0012] Furthermore, the table top module further comprises two upper connecting rods and two lower connecting rods, the two upper connecting rods are symmetrically arranged, the two lower connecting rods are symmetrically arranged, one end of each of the upper connecting rods and the lower connecting rods is rotatably connected to the table top, and the end of the upper connecting rod away from the table top is rotatably arranged on the rotating bracket;

[0013] The output end of the first motor is provided with a synchronization rod, the synchronization rod is rotatably arranged on the rotating bracket, and the ends of the two lower connecting rods away from the table top are respectively connected to the two ends of the synchronization rod.

[0014] Furthermore, the rotating bracket includes a first frame body and a second frame body that are spaced apart;

[0015] One end of the upper connecting rod away from the table top is rotatably disposed on the first frame, and another end of the upper connecting rod away from the table top is rotatably disposed on the second frame;

[0016] The two ends of the synchronization rod are rotatably arranged on the first frame and the second frame respectively, one end of the synchronization rod passes through the first frame and is connected to one of the lower connecting rods, and the other end of the synchronization rod passes through the second frame and is connected to the other lower connecting rod.

[0017] Furthermore, each of the first frame and the second frame has a shaft sleeve;

[0018] The worm wheel extends an output shaft to both sides thereof, one output shaft extends into one shaft sleeve and is fixedly connected thereto, and the other output shaft extends into the other shaft sleeve and is fixedly connected thereto.

[0019] Furthermore, the installation body includes a supporting beam and a plurality of installation brackets;

[0020] When the electric table assembly is installed on the backrest of a car seat, one end of the supporting beam is fixed to the left side of the backrest, and the other end of the supporting beam is fixed to the right side of the backrest.

[0021] Furthermore, the two upper connecting rods, the two lower connecting rods and the table top form a double rocker mechanism.

[0022] Furthermore, a box is provided on the outside of the worm wheel, and the box is fixedly connected to the mounting body; the worm wheel is accommodated in the box, and the end of the worm away from the second motor extends into the box and meshes with the worm wheel;

[0023] An upper limit portion and a lower limit portion are provided on the box body. The upper limit portion and the lower limit portion are respectively located at the upper and lower ends of the worm wheel, and can respectively limit the upper limit position and the lower limit position of the worm wheel rotation.

[0024] Furthermore, a Hall sensor is provided on the table top or the backrest, and the Hall sensor is used to identify the angle or position of the table top to control the working state of the second motor.

[0025] The technical solution adopted by the present invention to solve the technical problem is to provide a car seat, which includes a backrest, and the back side of the backrest is provided with the above-mentioned electric table board assembly.

[0026] Compared with the prior art, the present invention has at least the following beneficial effects:

[0027] In the present invention, a first motor drives the tabletop to switch between an extended and folded state, achieving electric expansion and folding of the tabletop. The synchronous rod also drives the left and right sides of the tabletop to move simultaneously, effectively achieving synchronized movement of both sides when the tabletop is extended and folded, with good synchronization of the tabletop movement. A second motor drives the rotating bracket via a worm and worm gear, which in turn drives the tabletop module to adjust the tabletop's angle. When the tabletop is extended and used, if the backrest angle is adjusted, the second motor drives the worm gear mechanism to rotate the rotating bracket, adjusting the tabletop's angle and restoring it to a horizontal position, ensuring normal use for passengers. The worm and worm gear drive the tabletop to adaptively adjust its horizontal position, ensuring stable transmission and minimal vibration. Objects placed on the tabletop are less likely to be jolted and fall, and noise is low. The reverse self-locking properties of the worm gear mechanism ensure a stable resting position for the tabletop, ensuring structural stability during use. The tabletop exhibits excellent rigidity, strong load-bearing capacity, and minimal vibration during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural diagram of the electric table assembly (table unfolded) of the utility model configured on the backrest;

[0029] Figure 2 for Figure 1 Structural diagram from another perspective;

[0030] Figure 3 for Figure 1 Side view of;

[0031] Figure 4 for Figure 3 Schematic diagram of the center table after folding;

[0032] Figure 5 for Figure 1 Schematic diagram of the structure after removing the backrest and table top;

[0033] Figure 6 for Figure 5 Structural diagram from another perspective;

[0034] Figure 7 This is the assembly diagram of the connecting rod group, leveling drive module and rotating bracket when the table top is unfolded;

[0035] Figure 8 This is the exploded view of the leveling drive module;

[0036] Figure 9 This is an assembly diagram of the first motor, the rotating bracket, and the connecting rod group when the table top is in the unfolded state;

[0037] Figure 10 This is the assembly diagram of the first motor, rotating bracket and connecting rod group when the table top is in the folded state.

[0038] In the picture:

[0039] 1. Install the main body; 10. Support beam; 11. Install the bracket;

[0040] 2. Rotating bracket; 20. First motor; 21. First frame; 22. Second frame; 200. Synchronous rod; 210. Bushing;

[0041] 3. Table board module; 30. Table board; 31. Upper connecting rod; 32. Lower connecting rod;

[0042] 4. Leveling drive module; 40. Second motor; 41. Worm; 42. Worm gear; 420. Output shaft; 43. Box; 431. Upper limit portion; 432. Lower limit portion;

[0043] 5. Backrest. DETAILED DESCRIPTION

[0044] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0045] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, terms such as "first," "second," and "an" in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0047] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0048] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0049] like Figures 1-6 as well as Figure 8 As shown, an electric tabletop assembly primarily comprises: a mounting body 1, a rotating bracket 2, a tabletop module 3, and a leveling drive module 4. The mounting body 1 primarily comprises a support beam 10 and multiple mounting brackets 11; the rotating bracket 2 primarily comprises a first frame 21 and a second frame 22; the tabletop module 3 primarily comprises a tabletop 30, an upper connecting rod 31, and a lower connecting rod 32; and the leveling drive module 4 primarily comprises a second motor 40, a worm 41, a worm gear 42, and a housing 43. When the electric tabletop assembly is installed on a vehicle seat, the mounting body 1 is fixedly mounted to the frame of the vehicle seat backrest 5, with the electric tabletop assembly positioned on the backside of the backrest 5.

[0050] The rotating bracket 2 is rotatably mounted on the mounting body 1 and is provided with a first motor 20. The tabletop module 3 is mounted on the rotating bracket 2. When the rotating bracket 2 rotates, the tabletop module 3 is driven to rotate together with the rotating bracket 2 to adjust the angle of the tabletop 30, thereby achieving a leveling function for the tabletop 30.

[0051] The table top module 3 is movably arranged on the rotating bracket 2 and connected to the first motor 20. The table top module 3 includes a table top 30 and a connecting rod group. The connecting rod group includes two upper connecting rods 31 and two lower connecting rods 32. The table top 30 has an unfolded state and a folded state. The first motor 20 can drive the table top 30 to switch between the unfolded state and the folded state, that is, the table top 30 is electrically unfolded and folded by the first motor 20. In the design position state, when the table top 30 is in the unfolded state, the table top 30 is in a horizontal setting. When the table top 30 is in the folded state, the table top 30 can be attached to the back side of the backrest 5.

[0052] The leveling drive module 4 includes a second motor 40, a worm gear 42, and a worm 41. The second motor 40 is mounted on the mounting body 1; the worm 41 is disposed at the output end of the second motor 40; the worm gear 42 engages with the worm gear 41 and is connected to the rotating bracket 2. The worm 41 drives the worm gear 42 to rotate, which in turn drives the rotating bracket 2 to rotate the table module 3. In actual use, when the table 30 is in the unfolded state, the leveling drive module 4 can adjust the angle of the table 30 relative to the horizontal plane by driving the rotating bracket 2 to rotate, thereby achieving leveling of the table 30, ensuring that even after the backrest 5 has been tilted, the passenger can still use the table 30 normally.

[0053] like Figure 5-Figure 8 As shown, in this embodiment, the worm 41 and the worm wheel 42 form a worm gear mechanism, and the worm gear mechanism satisfies the reverse self-locking condition. The worm 41 can drive the worm wheel 42 to rotate, but the worm wheel 42 cannot drive the worm 41 to rotate. The reverse self-locking property of the worm gear mechanism can ensure the stability of the docking position of the table top 30 and the structural stability of the table top 30 when in use. When the table top 30 is in a horizontal state, the reverse self-locking property can ensure that the table top 30 remains in the horizontal state, and the worm 41 cannot be driven in the reverse direction by the table top 30.

[0054] It needs to be explained that the helix angle λ of the worm 41 is a key parameter that determines whether the worm gear mechanism has a reverse self-locking characteristic. When the helix angle λ is less than a certain critical value, the worm gear mechanism has a reverse self-locking characteristic. This critical value is usually related to the friction coefficient of the worm gear material. As long as: tan(λ)<μ, where μ is the friction coefficient of the contact surface between the worm wheel 42 and the worm 41, the worm gear mechanism has a reverse self-locking characteristic, and the worm wheel 42 cannot drive the worm 41 to rotate.

[0055] Preferably, in this embodiment, a housing 43 is provided on the outside of the worm gear 42, and the housing 43 is fixedly connected to the installation body 1; the worm gear 42 is accommodated in the housing 43, and the end of the worm 41 away from the second motor 40 extends into the housing 43 and engages with the worm gear 42. To facilitate assembly and processing, the housing 43 of this embodiment includes a housing and a cover, which are detachably fixedly connected by bolts, and a mounting bracket 11 for fixing the housing and the cover is provided on the installation body 1. Enclosing the spiral transmission part of the worm gear 42 and the worm 41 in the housing 43 can further reduce noise, and can prevent dust and impurities, ensuring reliable transmission. Among them, an upper limit portion and a lower limit portion 432 are provided on the housing 43, and the upper limit portion 431 and the lower limit portion 432 are respectively located at the upper and lower ends of the worm gear 42, which can respectively limit the upper limit position and lower limit position of the rotation of the worm gear 42, thereby controlling the rotation range of the rotating bracket 2.

[0056] Optionally, a Hall effect sensor is provided on the tabletop 30 or backrest 5. This sensor is used to identify the angle or position of the tabletop 30 to control the operating state of the second motor 40, thereby enabling adaptive leveling of the tabletop 30. Specifically, when the tabletop 30 is horizontal, the backrest 5 adjusts its angle, causing the tabletop 30 to rotate, causing it to become unlevel. The Hall effect sensor recognizes this information and feeds a signal back to the vaporization control system, controlling the operation of the second motor 40. The leveling drive module 4 then drives the rotating bracket 2 to rotate, restoring the tabletop 30 to a horizontal position and deactivating the second motor 40.

[0057] Specifically, a sleeve 210 is provided on each of the first and second frames 21 and 22. An output shaft 420 extends from each side of the worm gear 42. One output shaft 420 extends into one sleeve 210 and is fixedly connected thereto, while the other output shaft 420 extends into the other sleeve 210 and is fixedly connected thereto. Specifically, the fixing method can be removably fixed using screws or bolts. Both sleeves 210 are rotatably mounted on the mounting body 1. The mounting body 1 has multiple mounting brackets 11, two of which are respectively provided for mounting the sleeves 210. By having the two output shafts 420 connected and fixed to the two sleeves 210, on-site assembly can be facilitated and reduced in difficulty.

[0058] The mounting body 1 includes a supporting beam 10 and a plurality of mounting brackets 11. When the electric tabletop assembly is mounted on the backrest 5 of the car seat, one end of the supporting beam 10 is fixed to the left side of the backrest 5, and the other end of the supporting beam 10 is fixed to the right side of the backrest 5. The two ends of the supporting beam 10 can be welded and fixed to the frame of the backrest 5 or detachably fixed by bolts. The supporting beam 10 can effectively ensure the overall rigidity of the tabletop assembly, reduce the shaking of the tabletop 30, and ensure that the tabletop 30 has a strong load-bearing capacity. The plurality of mounting brackets 11 are respectively used for fixing and mounting the second motor 40, the first frame 21, the second frame 22, and the box 43.

[0059] During actual use, when the table top 30 is in the unfolded state for use by passengers, if the backrest 5 is tilted so that the table top 30 is no longer in a horizontal state, the second motor 40 in the leveling drive module 4 drives the worm 41 to rotate, and the worm 41 engages the worm gear 42 to rotate the worm gear 42, which drives the rotating bracket 2 to rotate, and the rotating bracket 2 drives the connecting rod group and the table top 30 to rotate accordingly, so that the table top 30 can be restored to a horizontal state. The table top 30 is driven by the worm 41 and the worm gear 42 to perform horizontal adaptive adjustment, which can ensure stable transmission and small shaking, so that things placed on the table top 30 are not easy to bump and fall, and the noise is low.

[0060] like Figures 1-4 Combined with Figure 9-10 As shown, the electric unfolding and electric folding of the electric table top assembly of this embodiment are described in detail below.

[0061] The tabletop module 3 of this embodiment also includes two upper connecting rods 31 and two lower connecting rods 32 (i.e., a connecting rod assembly). The two upper connecting rods 31 and the two lower connecting rods 32 are symmetrically arranged. One end of each upper connecting rod 31 and the lower connecting rod 32 is rotatably connected to the tabletop 30. The end of the upper connecting rod 31 away from the tabletop 30 is rotatably mounted on the rotating bracket 2. A synchronization rod 200 is disposed at the output end of the first motor 20. The synchronization rod 200 is rotatably mounted on the rotating bracket 2. The ends of the two lower connecting rods 32 away from the tabletop 30 are respectively connected to the ends of the synchronization rod 200. The two upper connecting rods 31, the two lower connecting rods 32, and the tabletop 30 form a double rocker mechanism. When the first motor 20 rotates the synchronization rod 200, it drives the two lower connecting rods 32 to rotate, actuating the double rocker mechanism and synchronizing the left and right sides of the tabletop 30, allowing the tabletop 30 to move between a folded position and an extended position. During actual use, the two ends of the synchronization rod 200 synchronously drive the two lower connecting rods 32, causing them to move synchronously. This effectively ensures the synchronization of the left and right movements of the table top 30. When the table top 30 is folded and unfolded, as well as when in use, it is protected from twisting due to force applied to one side, achieving true left-right synchronization with good synchronization, minimal shake, and excellent rigidity. When the table top 30 is in the unfolded position, the lower surface of the upper connecting rod 31 abuts against the upper surface of the lower connecting rod 32, limiting the position of the table top 30 and ensuring its stability after unfolding.

[0062] Specifically, one end of an upper connecting rod 31 away from the table top 30 is rotatably mounted on the first frame 21, and the other end of the upper connecting rod 31 away from the table top 30 is rotatably mounted on the second frame 22. The two ends of the synchronization rod 200 are rotatably mounted on the first frame 21 and the second frame 22, respectively. One end of the synchronization rod 200 passes through the first frame 21 and is fixedly connected to a lower connecting rod 32. The other end of the synchronization rod 200 passes through the second frame 22 and is fixedly connected to the other lower connecting rod 32.

[0063] The unfolding working principle of the electric table top assembly of this embodiment is as follows: when the table top 30 is in the folded state, it is folded on the back side of the backrest 5 of the car seat. When the table top 30 needs to be unfolded and used, the first motor 20 rotates the synchronization rod 200, and the synchronization rod 200 drives the two lower connecting rods 32 to rotate synchronously, thereby moving the connecting rod group and the table top 30, switching the table top 30 to the unfolded state, and the first motor 20 stops working. The first motor 20 can also be controlled to be turned on and off by setting a Hall element. The folding process of the table top 30 is opposite to the unfolding process. In this unfolding and folding structure, its overall structure is very simple. The synchronization rod 200 directly drives the connecting rod mechanism, and there is no need to set a gear transmission system, which simplifies the structure of the existing electric table top assembly.

[0064] The leveling working principle of the electric table top assembly of this embodiment is as follows: when the car seat is in the designed position, the table top 30 is unfolded and in a horizontal state. When the angle of the backrest 5 is adjusted, the table top assembly moves with the movement of the backrest 5, and the table top 30 tilts and is no longer horizontal. At this time, a signal can be sent by the Hall sensor to control the operation of the second motor 40. The second motor 40 drives the worm 41 to rotate, and the worm 41 engages the worm gear 42 to rotate. The worm gear 42 drives the first frame 21 and the second frame 22 to rotate. The first frame 21 and the second frame 22 drive the connecting rod group and the table top 30 thereon to rotate, and the table top 30 is leveled. After the table top 30 is in a horizontal state, the Hall sensor sends a signal to control the second motor 40 to stop, and the adaptive leveling of the table top 30 is completed. In this adaptive leveling structure, the worm gear mechanism drives the table top 30 to perform horizontal adaptive adjustment, which can ensure stable transmission and small shaking. Things placed on the table top 30 are not easy to be bumped and fall, and the noise is low. The reverse self-locking characteristics of the worm gear mechanism can ensure that the docking position of the table top 30 is stable, and the structural stability of the table top 30 when in use is guaranteed.

Claims

1. An electric table assembly, characterized in that: include: Install the main body; A rotating bracket is rotatably arranged on the mounting body, and a first motor is provided on the rotating bracket; a table top module, movably disposed on the rotating bracket and connected to the first motor, the table top module including a table top having an unfolded state and a folded state, the first motor being capable of driving the table top to switch between the unfolded state and the folded state; A leveling drive module includes a second motor, a worm gear, and a worm, wherein the second motor is disposed on the mounting body; the worm gear is disposed at an output end of the second motor; the worm gear is engaged with the worm gear and connected to the rotating bracket, and the worm gear can drive the worm gear to rotate; When the table top is in the unfolded state, the leveling drive module can adjust the angle of the table top relative to the horizontal plane by driving the rotating bracket to rotate.

2. The electric table assembly according to claim 1, characterized in that: The worm and the worm wheel form a worm-gear mechanism, and the worm-gear mechanism satisfies a reverse self-locking condition, wherein the worm can drive the worm wheel to rotate, but the worm wheel cannot drive the worm to rotate.

3. The electric table assembly according to claim 1, characterized in that: The table top module further comprises two upper connecting rods and two lower connecting rods, the two upper connecting rods are symmetrically arranged, the two lower connecting rods are symmetrically arranged, one end of each of the upper connecting rods and the lower connecting rods is rotatably connected to the table top, and the end of the upper connecting rod away from the table top is rotatably arranged on the rotating bracket; The output end of the first motor is provided with a synchronization rod, the synchronization rod is rotatably arranged on the rotating bracket, and the ends of the two lower connecting rods away from the table top are respectively connected to the two ends of the synchronization rod.

4. The electric table assembly according to claim 3, characterized in that: The rotating bracket includes a first frame body and a second frame body which are spaced apart from each other; One end of the upper connecting rod away from the table top is rotatably disposed on the first frame, and another end of the upper connecting rod away from the table top is rotatably disposed on the second frame; The two ends of the synchronization rod are rotatably arranged on the first frame and the second frame respectively, one end of the synchronization rod passes through the first frame and is connected to one of the lower connecting rods, and the other end of the synchronization rod passes through the second frame and is connected to the other lower connecting rod.

5. The electric table assembly according to claim 4, characterized in that: The first frame and the second frame each have a shaft sleeve; The worm wheel extends an output shaft to both sides thereof, one output shaft extends into one shaft sleeve and is fixedly connected thereto, and the other output shaft extends into the other shaft sleeve and is fixedly connected thereto.

6. The electric table assembly according to claim 1, characterized in that: The installation body includes a supporting beam and a plurality of installation brackets; When the electric table assembly is installed on the backrest of a car seat, one end of the supporting beam is fixed to the left side of the backrest, and the other end of the supporting beam is fixed to the right side of the backrest.

7. The electric table assembly according to claim 3, characterized in that: The two upper connecting rods, the two lower connecting rods and the table top form a double rocker mechanism.

8. The electric table assembly according to claim 2, characterized in that: A box is provided on the outside of the worm wheel, and the box is fixedly connected to the mounting body; the worm wheel is accommodated in the box, and the end of the worm away from the second motor extends into the box and meshes with the worm wheel; An upper limit portion and a lower limit portion are provided on the box body. The upper limit portion and the lower limit portion are respectively located at the upper and lower ends of the worm wheel, and can respectively limit the upper limit position and the lower limit position of the worm wheel rotation.

9. The electric table assembly according to claim 6, characterized in that: A Hall sensor is provided on the table top or the backrest, and the Hall sensor is used to identify the angle or position of the table top to control the working state of the second motor.

10. A car seat, characterized in that: It comprises a backrest, and the back side of the backrest is provided with the electric table top assembly as described in any one of claims 1-9.

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