Table plate assembly with table plate capable of being leveled and automobile seat

Abstract

The utility model relates to the technical field of table plates, and discloses a table plate assembly with a table plate capable of being leveled and an automobile seat. The rotating bracket is rotatably arranged on the fixed bracket; the connecting rod group is arranged between the table plate and the rotating bracket; the driving module comprises a motor, a worm gear and a worm, and the motor is arranged on the fixing support; the worm is arranged at the output end of the 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; the table board has an unfolded state and a folded state, and when the table board is in the unfolded state, the driving module can adjust the angle of the table board relative to the horizontal plane by driving the rotating support to rotate. The utility model has the advantages that when the table plate is leveled, the transmission is stable, the noise is low, the rigidity of the table plate is good, and the bearing capacity is strong.

Description

Technical Field

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

[0002] The back of the car seat is equipped with an electric table for rear passengers to use. The motor drives the table to switch between the extended and folded positions, making it more convenient to use than traditional manually adjustable tables.

[0003] The backrest of a car seat can usually be rotated and adjusted relative to the seat, allowing the car seat to have more usage modes, such as zero-gravity mode and bed mode. When the car seat is in the designed position, the table top is in a horizontal state after being unfolded. However, when the backrest is adjusted, the table top will also rotate with the adjustment of the backrest, and it will not be able to remain horizontal, affecting the normal use of the table top by passengers. To ensure that the table top can return to a horizontal state after the backrest is rotated and adjusted, the existing technology uses a gear rack mechanism or a gyroscope to level the table top. However, its transmission stability is poor, the noise is loud, and the overall rigidity is poor, and the table top is prone to shaking. 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 a table top assembly and a car seat with a levelable table top that has smooth transmission, low noise, good rigidity and strong load-bearing capacity.

[0005] The technical solution adopted by the present invention to solve the technical problem is to provide a table top assembly with a leveling table top, comprising:

[0006] Fixed bracket;

[0007] A rotating bracket is rotatably arranged on the fixed bracket;

[0008] A table top and a connecting rod assembly, wherein the connecting rod assembly is arranged between the table top and the rotating bracket;

[0009] The driving module includes a motor, a worm gear and a worm, wherein the motor is arranged on the fixed bracket; the worm gear is arranged at the output end of the 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] The table top has an unfolded state and a folded state. When the table top is in the unfolded state, the driving 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, a box body is provided on the outer side of the worm wheel, the worm wheel is accommodated in the box body, and one end of the worm away from the motor extends into the box body and engages with the worm wheel.

[0013] Furthermore, the box body is detachably fixed on the fixing bracket;

[0014] 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 limit the upper limit position and the lower limit position of the worm wheel rotation.

[0015] Furthermore, the rotating bracket includes a first frame and a second frame arranged at an interval, and the worm gear extends an output rod to each side thereof, one output rod is fixedly connected to the first frame, and the other output rod is fixedly connected to the second frame.

[0016] Furthermore, each of the first frame and the second frame has a sleeve, one of the output rods passes through one of the sleeves and is fixedly connected thereto, and the other output rod passes through the other of the sleeves and is fixedly connected thereto;

[0017] The two sleeves can be rotatably inserted into the fixing bracket.

[0018] Furthermore, a synchronization rod is disposed between the first frame and the second frame and is rotatable relative to the first frame and the second frame;

[0019] The connecting rod group includes an upper left connecting rod, an upper right connecting rod, a lower left connecting rod and a lower right connecting rod, and one end of the upper left connecting rod, the upper right connecting rod, the lower left connecting rod and the lower right connecting rod are rotatably connected to the table top; the ends of the upper left connecting rod and the upper right connecting rod away from the table top are rotatably connected to the first frame and the second frame respectively; the ends of the lower left connecting rod and the lower right connecting rod away from the table top are respectively connected to the two ends of the synchronization rod.

[0020] Furthermore, the upper left connecting rod, the upper right connecting rod, the lower left connecting rod, the lower right connecting rod and the table top form a double rocker mechanism;

[0021] The table top can be switched between an unfolded state and a folded state by rotating the synchronizing rod.

[0022] Furthermore, the fixing bracket includes a supporting beam;

[0023] When the table top assembly is mounted on a backrest of a car seat, one end of the supporting crossbeam is fixed to the left side of the backrest, and the other end of the supporting crossbeam is fixed to the right side of the backrest.

[0024] The technical solution adopted by the present invention to solve the technical problem is to provide a car seat, comprising:

[0025] Backrest;

[0026] The above-mentioned table top assembly with adjustable table top, wherein the fixing bracket is fixed to the backrest;

[0027] A Hall element is provided on the backrest or the table top, and the Hall element is used to identify the angle or position of the table top to control the working state of the motor;

[0028] When the car seat is in the designed position, the table top is in the folded state, and is attached to the back side of the backrest; when the table top is in the unfolded state, it is set horizontally.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects:

[0030] In the present invention, when the tabletop is in the extended position for passenger use, if the backrest is tilted and the tabletop is no longer horizontal, the motor in the drive module drives the worm, which engages the worm gear, causing the rotating bracket to rotate. The rotating bracket then drives the connecting rod assembly and the tabletop to rotate, restoring the tabletop to a horizontal position. The worm and worm gear drive the tabletop to adaptively adjust its horizontal position, ensuring stable transmission and minimal vibration, preventing items placed on the tabletop from being jolted or dropped, and generating low noise. The reverse self-locking nature of the worm gear mechanism ensures a stable resting position for the tabletop, ensuring structural stability during use. Furthermore, the worm gear and the worm gear (transmission area) are enclosed in a housing, further reducing noise, protecting against dust and debris, and ensuring reliable transmission. The fixed bracket includes a support beam, which secures the entire tabletop assembly to the backrest. The two ends of the support beam are fixed to the left and right sides of the backrest, respectively, ensuring the overall rigidity of the tabletop assembly, minimizing vibration, and ensuring a strong load-bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural diagram of the tabletop assembly of the utility model configured on the backrest;

[0032] Figure 2 for Figure 1 Structural diagram from another perspective;

[0033] Figure 3 for Figure 1 Schematic diagram of the floor plan;

[0034] Figure 4 for Figure 1 Schematic diagram of the structure after removing the backrest, box and table top;

[0035] Figure 5 for Figure 4 Structural diagram from another perspective;

[0036] Figure 6 This is a schematic diagram of the assembly of the drive module, connecting rod group and rotating bracket;

[0037] Figure 7 This is an exploded view of the drive module, the first frame, and the second frame.

[0038] In the picture:

[0039] 1. Fixing bracket; 10. Support beam;

[0040] 2. Rotating bracket; 21. First frame; 22. Second frame; 23. Synchronous rod; 210. Sleeve;

[0041] 3. Table top;

[0042] 4. Connecting rod assembly; 41. Upper left connecting rod; 42. Upper right connecting rod; 43. Lower left connecting rod; 44. Lower right connecting rod;

[0043] 5. Drive module; 50. Motor; 51. Worm; 52. Worm gear; 520. Output rod; 53. Box body; 531. Box shell; 532. Box cover; 531A. Upper limit part; 531B. Lower limit part;

[0044] 6. Backrest. DETAILED DESCRIPTION

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] like Figures 1-6 As shown, a table top assembly with an adjustable table top mainly includes: a fixed bracket 1, a rotating bracket 2, a table top 3, a connecting rod group 4 and a driving module 5, wherein the connecting rod group 4 mainly includes: an upper left connecting rod 41, an upper right connecting rod 42, a lower left connecting rod 43 and a lower right connecting rod 44, and the driving module 5 mainly includes: a motor 50, a worm 51 and a worm gear 52.

[0051] The fixed bracket 1 is the support module for the tabletop assembly and includes a support beam 10 and multiple mounting brackets (not labeled in the figure) for mounting other components. When the tabletop assembly is placed on the back of the car seat backrest 6, one end of the support beam 10 is fixed to the left side of the backrest 6, and the other end of the support beam 10 is fixed to the right side of the backrest 6. Optionally, the two ends of the support beam 10 can be welded to the frame of the backrest 6 or removably fixed with bolts. The support beam 10 effectively ensures the overall rigidity of the tabletop assembly, reduces the shaking of the tabletop 3, and ensures that the tabletop 3 has a strong load-bearing capacity.

[0052] The rotating bracket 2 is rotatably provided on the fixed bracket 1, and the table top 3 is leveled by the rotation of the rotating bracket 2. The connecting rod group 4 is provided between the table top 3 and the rotating bracket 2. When the rotating bracket 2 rotates, the connecting rod group 4 and the table top 3 move accordingly to facilitate the leveling of the table top 3. Specifically, the rotating bracket 2 includes a first frame 21 and a second frame 22 that are spaced apart, and a synchronization rod 23 that can rotate relative to the first frame 21 and the second frame 22 is provided between the first frame 21 and the second frame 22. The connecting rod group 4 can be driven by the synchronization rod 23 to drive the table top 3 to switch between the expanded state and the folded state. The driving module 5 can be connected to the synchronization rod 23 so that the expansion and folding of the table top 3 can be achieved electrically. The expansion and folding of the table top 3 in this embodiment can be achieved in manual or electric mode.

[0053] Optionally, the linkage assembly 4 includes an upper left linkage 41, an upper right linkage 42, a lower left linkage 43, and a lower right linkage 44. One end of each of the upper left linkage 41, the upper right linkage 42, the lower left linkage 43, and the lower right linkage 44 is rotatably connected to the table top 3. The ends of the upper left linkage 41 and the upper right linkage 42, which are remote from the table top 3, are rotatably connected to the first frame 21 and the second frame 22, respectively. The ends of the lower left linkage 43 and the lower right linkage 44, which are remote from the table top 3, are respectively connected to both ends of the synchronization rod 23. The upper left linkage 41, the upper right linkage 42, the lower left linkage 43, and the lower right linkage 44 form a double rocker mechanism with the table top 3. Rotation of the synchronization rod 23 enables the table top 3 to be switched between an extended state and a folded state. When the table top 3 is in the unfolded state, the lower surface of the upper left connecting rod 41 abuts against the upper surface of the lower left connecting rod 43, and the upper surface of the upper right connecting rod 42 abuts against the upper surface of the lower right connecting rod 44, which can ensure the stability of the table top 3 in the unfolded state. The connecting rod group 4 is an existing structure and will not be described here in detail.

[0054] The drive module 5 includes a motor 50, a worm gear 52 and a worm 51. The motor 50 is arranged on the fixed bracket 1. A motor 50 bracket is provided on the support beam 10 of the fixed bracket 1. The motor 50 is detachably fixed to the motor 50 bracket. The worm 51 is arranged at the output end of the motor 50. The worm 51 passes through the support beam 10 from top to bottom and extends to the worm gear 52. The worm gear 52 is engaged with the worm 51 and is connected to the rotating bracket 2. The worm 51 and the worm gear 52 form a worm gear mechanism. The worm 51 can drive the worm gear 52 to rotate. During use, the table top 3 of this embodiment has an unfolded state and a folded state. When the table top 3 is in the unfolded state, the drive module 5 can adjust the angle of the table top 3 relative to the horizontal plane by driving the rotating bracket 2 to rotate, so that when the backrest 6 is tilted, the table top 3 can be leveled to facilitate passengers to use the table top 3.

[0055] Specifically, the worm gear mechanism of this embodiment meets the reverse self-locking condition, the worm 51 can drive the worm wheel 52 to rotate, and the worm wheel 52 cannot drive the worm 51 to rotate. By utilizing the reverse self-locking property of the worm gear mechanism, the parking position of the table top 3 can be guaranteed to be stable, and the structural stability of the table top 3 when in use can be guaranteed. It should be explained that the helix angle λ of the worm 51 is a key parameter that determines whether the worm gear mechanism has a reverse self-locking property. When the helix angle λ is less than a certain critical value, the worm gear mechanism has a reverse self-locking property. This critical value is usually related to the friction coefficient of the worm gear material. As long as it satisfies: tan(λ)<μ, where μ is the friction coefficient of the contact surface between the worm wheel 52 and the worm 51, the worm gear mechanism has a reverse self-locking property, and the worm wheel 52 cannot drive the worm 51 to rotate.

[0056] In this embodiment, a housing 53 is provided on the outside of the worm gear 52. The worm gear 52 is accommodated in the housing 53. The end of the worm 51 away from the motor 50 extends into the housing 53 and engages with the worm gear 52. The housing 53 is detachably fixed to the fixed bracket 1. An upper limit portion and a lower limit portion 531B are provided on the housing 53. The upper limit portion 531A and the lower limit portion 531B are located at the upper and lower ends of the worm gear 52, respectively, and can limit the upper and lower limit positions of the worm gear 52, thereby controlling the rotation range of the rotating bracket 2. Optionally, the housing 53 includes a housing 531 and a cover 532. The cover 532 is detachably covered on the housing 531, enclosing the worm gear 52 and the spiral transmission portion of the worm in the housing 53, which can further reduce noise, prevent dust and impurities, and ensure reliable transmission.

[0057] More specifically, Figure 4-Figure 7 As shown, the worm gear 52 extends from each side thereof with an output rod 520. One output rod 520 is fixedly connected to the first frame 21, and the other output rod 520 is fixedly connected to the second frame 22. Both the first frame 21 and the second frame 22 have a sleeve 210. One output rod 520 passes through and is fixedly connected to one sleeve 210, while the other output rod 520 passes through and is fixedly connected to the other sleeve 210. Specifically, the fixing method can be removably fixed using screws or bolts. Both sleeves 210 are rotatably inserted into the fixed bracket 1. By plugging and fixing the two output rods 520 to the two sleeves 210, on-site assembly is facilitated and reduced in difficulty.

[0058] In actual use, when the table top 3 is in the extended position for passenger use, if the backrest 6 is tilted and the table top 3 is no longer horizontal, the motor 50 in the drive module 5 drives the worm 51 to rotate, and the worm 51 engages the worm gear 52, causing the rotating bracket 2 to rotate. The rotating bracket 2 drives the connecting rod assembly 4 and the table top 3 to rotate accordingly, thereby restoring the table top 3 to a horizontal position. The worm 51 and worm gear 52 drive the table top 3 to perform adaptive horizontal adjustment, ensuring stable transmission, minimal shaking, and preventing objects placed on the table top 3 from being easily shaken and falling, and with low noise.

[0059] When the table top assembly is placed on a car seat, it is fixed to the backrest 6 via the support beam 10 on the fixing bracket 1, and the two ends of the support beam 10 are fixedly connected to the left and right sides of the backrest 6 frame respectively. A Hall element is provided on the backrest 6 or the table top 3, and the Hall element is used to identify the angle or position of the table top 3 to control the working state of the motor 50, thereby enabling the table top 3 to achieve adaptive leveling. When the car seat is in the designed position, the table top 3 is in a folded state, and the table top 3 is attached to the back side of the backrest 6, occupying a small space; when the table top 3 is in an unfolded state, the table top 3 is arranged horizontally.

[0060] The working principle of the table top assembly of this embodiment is as follows: when the car seat is in the designed position, the table top 3 is unfolded and in a horizontal state. When the backrest 6 is adjusted in angle, the table top assembly moves with the movement of the backrest 6, and the table top 3 tilts and is no longer horizontal. At this time, a signal can be sent through the Hall element to control the motor 50 to start. The motor 50 drives the worm 51 to rotate. The worm 51 engages the worm gear 52 to rotate. The worm gear 52 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 4 and the table top 3 thereon to rotate, and the table top 3 is leveled. When the table top 3 is in a horizontal state, the Hall element sends a signal to control the motor 50 to stop, and the adaptive leveling of the table top 3 is completed.

Claims

1. A table top assembly with adjustable leveling function, characterized in that: include: Fixed bracket; A rotating bracket is rotatably arranged on the fixed bracket; A table top and a connecting rod assembly, wherein the connecting rod assembly is arranged between the table top and the rotating bracket; The driving module includes a motor, a worm gear and a worm, wherein the motor is arranged on the fixed bracket; the worm gear is arranged at the output end of the 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; The table top has an unfolded state and a folded state. When the table top is in the unfolded state, the driving module can adjust the angle of the table top relative to the horizontal plane by driving the rotating bracket to rotate.

2. The table top assembly with adjustable table top 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 table top assembly with adjustable table top according to claim 1 or 2, characterized in that: A box body is provided on the outer side of the worm wheel, the worm wheel is accommodated in the box body, and one end of the worm away from the motor extends into the box body and meshes with the worm wheel.

4. The table top assembly with adjustable table top according to claim 3, characterized in that: The box body is detachably fixed on the fixing bracket; 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 limit the upper limit position and the lower limit position of the worm wheel rotation.

5. The table top assembly with adjustable table top according to claim 1, characterized in that: The rotating bracket includes a first frame body and a second frame body that are spaced apart. The worm gear extends an output rod to each side thereof. One output rod is fixedly connected to the first frame body, and the other output rod is fixedly connected to the second frame body.

6. The table top assembly with adjustable table top according to claim 5, characterized in that: The first frame and the second frame each have a sleeve, one output rod passes through one sleeve and is fixedly connected thereto, and the other output rod passes through the other sleeve and is fixedly connected thereto; The two sleeves can be rotatably inserted into the fixing bracket.

7. The table top assembly with adjustable table top according to claim 5 or 6, characterized in that: A synchronization rod is disposed between the first frame and the second frame and is rotatable relative to the first frame and the second frame; The connecting rod group includes an upper left connecting rod, an upper right connecting rod, a lower left connecting rod and a lower right connecting rod, and one end of the upper left connecting rod, the upper right connecting rod, the lower left connecting rod and the lower right connecting rod are rotatably connected to the table top; the ends of the upper left connecting rod and the upper right connecting rod away from the table top are rotatably connected to the first frame and the second frame respectively; the ends of the lower left connecting rod and the lower right connecting rod away from the table top are respectively connected to the two ends of the synchronization rod.

8. The table top assembly with adjustable table top according to claim 7, characterized in that: The upper left connecting rod, the upper right connecting rod, the lower left connecting rod, the lower right connecting rod and the table top form a double rocker mechanism; The table top can be switched between an unfolded state and a folded state by rotating the synchronizing rod.

9. The table top assembly with adjustable table top according to claim 1, characterized in that: The fixed bracket includes a supporting beam; When the table top assembly is mounted on a backrest of a car seat, one end of the supporting crossbeam is fixed to the left side of the backrest, and the other end of the supporting crossbeam is fixed to the right side of the backrest.

10. A car seat, characterized in that: include: Backrest; The table top assembly with a levelable table top according to any one of claims 1 to 9, wherein the fixing bracket is fixed to the backrest; A Hall element is provided on the backrest or the table top, and the Hall element is used to identify the angle or position of the table top to control the working state of the motor; When the car seat is in the designed position, the table top is in the folded state, and the table top is attached to the back side of the backrest; When the table top is in the unfolded state, the table top is arranged horizontally.

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