Seat backrest table plate structure capable of hovering at multiple angles

Abstract

The utility model discloses a seat backrest table plate structure capable of hovering at multiple angles, which relates to the technical field of seat backrest table plates, and comprises a table plate framework, a table plate upper shell, a table plate lower shell, a connecting rod structure and an angle adjusting mechanism, the angle adjusting mechanism comprises a rotating shaft and an angle adjuster which is connected with the rotating shaft and fixedly connected with the table plate framework, the angle adjuster and the rotating shaft can be locked or unlocked at multi-angle positions, and the two ends of the rotating shaft are connected with the tail ends of the two first connecting rods; according to the utility model, the conventional table board which only has an opening angle position and a closing angle position can be suspended at multiple angles, particularly, the angle of the table board can be continuously adjusted when the pitching angle of the chair back is adjusted so as to meet the use requirement of a user, the locking and unlocking of the table board can be realized at multiple positions, the use convenience is improved, and the user experience is improved. And great comfort is provided for the user.

Description

Technical Field

[0001] The utility model relates to the technical field of seat back tables of transportation tools, and is mainly applied to vehicle tables, and particularly relates to a seat back table structure capable of hovering at multiple angles. Background Art

[0002] After adjusting the front-back angle of the seat back of a traditional seat back with a small table, since the small table on the seat back only has a fixed flipping angle for closing and opening, the plane of the seat back table is inclined, and it is very difficult to place items anymore; in addition, limited by the shape and size, it is very difficult for a vehicle table to achieve angle adjustment. When facing the ever-changing technological development, especially in the fields of adjustable seats and zero-gravity seats, when the angle of the seat back is adjusted, the table is almost ineffective.

[0003] Under this background, there is an urgent need to design a seat back table structure capable of hovering at multiple angles to improve the above problems. Summary of the Utility Model

[0004] Aiming at the above problems in the prior art, the utility model provides a seat back table structure capable of hovering at multiple angles, which can achieve leveling of the table at multiple angles.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A seat back table structure capable of hovering at multiple angles includes a table frame, an upper table shell, a lower table shell, a link structure for flipping, and an angle adjustment mechanism for adjusting at multiple angles. The link structure includes a link bracket connected to the seat back frame, a first link and a second link connecting the link bracket. One end of the second link is connected to the table frame. The angle adjustment mechanism includes a rotating shaft and an angle adjuster connected to the rotating shaft and fixedly connected to the table frame. The angle adjuster can lock or unlock with the rotating shaft at multiple angular positions. Both ends of the rotating shaft are connected to the ends of two first links.

[0007] Preferably, the angle adjuster includes a housing, a first gear arranged on the rotating shaft, a transmission part connected to the first gear, a large claw for restricting the movement of the transmission part connected to the transmission part, a knob connected to the large claw, a lever connected to the knob, and a button connected to the lever. The transmission part includes a ratchet wheel. The large claw is provided with teeth meshing with the ratchet wheel. The knob is formed with a first plane and a first arc surface. When the first plane contacts the bottom surface of the large claw, the large claw meshes with the ratchet wheel. When the first arc surface contacts the bottom surface of the large claw, the large claw leaves the ratchet wheel.

[0008] Preferably, button holes are formed on both the upper table shell and the lower table shell.

[0009] Preferably, the transmission part includes a plurality of transmission shafts, and gears for transmission are arranged on the transmission shafts.

[0010] Preferably, a large jaw spring for pressing the large jaw is arranged on the large jaw, and a key spring is arranged on the key.

[0011] Preferably, the angle adjuster includes a left side plate, a middle plate, and a right side plate, and the ratchet wheel and the large jaw are arranged between the middle plate and the right side plate.

[0012] Preferably, a guide groove is arranged on the left side plate, and the guide groove is used to guide the movement of the shift lever.

[0013] Preferably, the shift knob is arranged through the middle plate, and both ends of the shift knob are rotatably connected to the left side plate and the right side plate.

[0014] Preferably, the angle adjuster includes a small jaw and a small jaw spring. The small jaw is arranged opposite to the large jaw and is connected to the shift knob, and the small jaw is used to lock the shift knob.

[0015] Preferably, a second plane is formed on the shift knob. When the second plane contacts the inner surface of the small jaw, the small jaw locks the shift knob under the drive of the small jaw spring.

[0016] Due to the adoption of the above technical solutions, compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. A seat back table board structure capable of multi-angle hovering according to the present invention enables the table board that originally only has two angular positions of opening and closing to hover at multiple angles. Especially when the backrest adjusts the pitching angle, the angle of the table board can be continuously adjusted to a state that can meet the user's usage requirements, and the locking and unlocking of the table board can be realized at multiple positions, improving the usage convenience;

[0018] 2. A seat back table board structure capable of multi-angle hovering according to the present invention has a simple manufacturing process, and the modular structure design makes disassembly and maintenance convenient;

[0019] 3. A seat back table board structure capable of multi-angle hovering according to the present invention can achieve multi-angle leveling of the table board when applied to the seat back table board of an automobile and other transportation tools, improving the usage comfort;

[0020] 4. The seat back table board structure of the present utility model that can hover at multiple angles can be applied in many other ranges, has strong compatibility, provides great convenience for the popularization of new force technologies, and provides great comfort for users. Brief Description of the Drawings

[0021] By referring to the following description in conjunction with the drawings, and with a more comprehensive understanding of the present utility model, other objects and results of the present utility model will become clearer and easier to understand. In the drawings:

[0022] Figure 1 is a three-dimensional view of the present utility model applied to a seat back;

[0023] Figure 2 is an exploded view of the present utility model;

[0024] Figure 3 is an exploded view of a part of the structure of the present utility model;

[0025] Figure 4 is a three-dimensional view of the angle adjuster of the present utility model;

[0026] Figure 5 is an exploded view of the angle adjuster of the present utility model;

[0027] Figure 6 is an exploded view of the angle adjuster of the present utility model with the housing removed;

[0028] Figure 7 is a three-dimensional view of a part of the structure of the angle adjuster of the present utility model;

[0029] Figure 8 is another three-dimensional view of a part of the structure of the angle adjuster of the present utility model;

[0030] Figure 9 is yet another three-dimensional view of a part of the structure of the angle adjuster of the present utility model;

[0031] Figure 10 is a three-dimensional view of a part of the structure of the angle adjuster of the present utility model with the housing removed;

[0032] Figure 11 is another three-dimensional view of a part of the structure of the angle adjuster of the present utility model with the housing removed;

[0033] Figure 12 is a three-dimensional view of the knob of the angle adjuster of the present utility model;

[0034] The reference numerals therein include: tabletop skeleton 1, tabletop upper shell 2, tabletop lower shell 3, link structure 4, angle adjustment mechanism 5, keyhole 31, link bracket 41, first link 42, second link 43, angle adjuster 50, housing 51, rotating shaft 52, first gear 53, transmission part 54, large claw 55, knob 56, lever 57, key 58, small claw 59, left side plate 510, middle plate 511, right side plate 512, fastener 513, ratchet 541, transmission shaft 542, gear 543, tooth 551, large claw spring 552, positioning pin 553, first plane 561, first arc surface 562, second plane 563, connecting piece 564, key spring 581, small claw spring 591, positioning pin 592, guide groove 5101, stop piece 5121, stop piece 5122. Detailed implementation manners

[0035] The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope protected by the present utility model.

[0036] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. It should be pointed out that all the drawings are exemplary representations. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0038] The present utility model will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0039] Refer to Figures 1 to 12 ,Figure 1 is a perspective view of the application of the present utility model on a seat back. Figure 2 is an exploded view of the present utility model. Figure 3 is an exploded view of a partial structure of the present utility model. Figure 4 is a perspective view of the angle adjuster of the present utility model. Figure 5 is an exploded view of the angle adjuster of the present utility model. Figure 6 is an exploded view of the angle adjuster of the present utility model with the housing removed. Figures 7 to 9 is a perspective view of a partial structure of the angle adjuster of the present utility model. Figure 10 and Figure 11 is a perspective view of a partial structure of the angle adjuster of the present utility model with the housing removed. Figure 12 is a perspective view of the knob of the angle adjuster of the present utility model; A seat back table board structure capable of hovering at multiple angles provided by the present utility model includes a table board skeleton 1, an upper table board shell 2, a lower table board shell 3, a connecting rod structure 4, and an angle adjusting mechanism 5. The upper table board shell 2 and the lower table board shell 3 are arranged outside the table board skeleton 1. The connecting rod structures 4 are symmetrically arranged and are used to support and flip the table board. That is, a connecting rod structure 4 is provided on each side of the table board skeleton 1. The connecting rod structure 4 preferably adopts a four-link structure. The connecting rod structure 4 includes a connecting rod bracket 41 connected to the backrest skeleton (not shown), a first connecting rod 42 and a second connecting rod 43 connecting the connecting rod bracket 41. One end of the second connecting rod 43 is connected to the table board skeleton 1. The angle adjusting mechanism 5 is used to adjust the table board at multiple angles. The angle adjusting mechanism 5 includes a rotating shaft 52 and an angle adjuster 50 connected to the rotating shaft 52 and fixedly connected to the table board skeleton 1. Both ends of the rotating shaft 52 are connected to the ends of two first connecting rods 42. The angle adjuster 50 can be locked or unlocked with the rotating shaft 52 at multiple angular positions, so that the table board can hover at multiple angles. Especially when the backrest adjusts the pitching angle, the table board angle can be continuously adjusted to reach a state that can meet the user's usage requirements, providing great convenience for the popularization of new force technologies and great comfort for users.

[0040] In one embodiment, the angle adjuster 50 includes a housing 51, a first gear 53, a transmission part 54, a large pawl 55, a knob 56, a lever 57, and a button 58. The housing 51 is fixedly connected to the tabletop frame 1. The rotating shaft 52 penetrates through the housing 51. The first gear 53 is arranged on the rotating shaft 52. The transmission part 54 is connected to the first gear 53. The transmission part 54 includes a ratchet wheel 541. The transmission part 54 can synchronously transmit the rotation of the rotating shaft 52 to the ratchet wheel 541. The large pawl 55 is connected to the transmission part 54. The large pawl 55 is rotatable and used to limit the movement of the transmission part 54. The large pawl 55 is provided with teeth 551 meshing with the ratchet wheel 541. The locking and unlocking of the rotating shaft 52 can be realized through the meshing relationship between the large pawl 55 and the ratchet wheel 541. The knob 56 is connected to the large pawl 55. The knob 56 can control the meshing or non-meshing of the large pawl 55 and the ratchet wheel 541. The lever 57 is connected to the knob 56. The button 58 is connected to the lever 57. Button holes 31 are formed on both the upper tabletop shell 2 and the lower tabletop shell 3. Both ends of the button 58 penetrate through the button holes 31.

[0041] In one embodiment, the transmission part 54 includes a plurality of transmission shafts 542. Gears 543 for transmission are arranged on the transmission shafts 542. Different transmission shafts 542 are meshed and rotated with each other through the gears 543. During the rotation of the rotating shaft 52, the rotational speed is gradually transmitted from the first gear 53 and the plurality of gears 543 to the ratchet wheel 541. In one embodiment, the rotational speed gradually increases from the first gear 53 to the plurality of gears 543, and finally reaches a transmission ratio of 1:4.

[0042] The knob 56 is formed with a first flat surface 561 and a first arc surface 562. When the first flat surface 561 contacts the bottom surface of the large pawl 55, the large pawl 55 meshes with the ratchet wheel 541, which is a locked state. When the first arc surface 562 contacts the bottom surface of the large pawl 55, the large pawl 55 leaves the ratchet wheel 541, which is an unlocked state.

[0043] The large pawl 55 is provided with a large pawl spring 552 for pressing the large pawl 55 to ensure the stability of the locked state. One end of the large pawl spring 552 is clamped on a positioning pin 553 arranged on the large pawl 55.

[0044] The button 58 is provided with button springs 581. Preferably, two button springs 581 are arranged on the button 58 above and below the lever 57 respectively to provide bidirectional elastic force to the button 58, that is, one end of the button spring 581 abuts against the lever 57, and the other end abuts against the inner surface of the housing 51.

[0045] In one embodiment, the angle adjuster 50 further includes a left side plate 510, a middle plate 511, and a right side plate 512, which are disposed inside the housing 51 and are used to connect and fix related parts. One ends of the left side plate 510, the middle plate 511, and the right side plate 512 are all connected to the rotating shaft 52, that is, the rotating shaft 52 penetrates through one ends of the left side plate 510, the middle plate 511, and the right side plate 512. The other ends of the left side plate 510, the middle plate 511, and the right side plate 512 are all fixed by fasteners 513. The first gear 53 is located between the middle plate 511 and the left side plate 510. The ratchet wheel 541 and the large pawl 55 are located between the middle plate 511 and the right side plate 512. The ratchet wheel 541 is disposed on the transmission shaft 542 at the last stage of the transmission part 54. Two ends of the large pawl 55 are rotatably connected to corresponding holes of the middle plate 511 and the right side plate 512. One end of the large pawl spring 552 is clamped on a positioning pin 553 provided on the large pawl 55, and the other end abuts against a retaining piece 5121 extending from the right side plate 512. The knob 56 penetrates through the middle plate 511. Two ends of the knob 56 are rotatably connected to the left side plate 510 and the right side plate 512. A connecting member 564 for connecting the lever 57 is provided on the knob 56. A guide groove 5101 is provided on the left side plate 510, and the guide groove 5101 is used to guide the movement of the lever 57. The button 58 is disposed outside the left side plate 510 and penetrates through the housing 51. After pressing the button 58, the lever 57 moves up and down along the guide groove 5101, thereby rotating the knob 56 to achieve the unlocking and locking functions.

[0046] In one embodiment, the angle adjuster 50 further includes a small pawl 59 and a small pawl spring 591. The small pawl 59 is disposed opposite to the large pawl 55 and is connected to the knob 56, that is, the small pawl 59 and the large pawl 55 are respectively disposed on two sides of the knob 56. The small pawl 59 is used to lock the knob 56. Two ends of the small pawl 59 are rotatably connected to corresponding holes of the middle plate 511 and the right side plate 512. One end of the small pawl spring 591 is clamped on a positioning pin 592 provided on the small pawl 59, and the other end abuts against a retaining piece 5122 extending from the right side plate 512. A second plane 563 is formed on the knob 56. When the second plane 563 contacts the inner surface of the small pawl 59, the small pawl 59 locks the knob 56 under the drive of the small pawl spring 591.

[0047] The following will refer to Figures 1 to 12 to illustrate the working principle of the present invention.

[0048] Locking working principle of the table board:

[0049] The tabletop frame 1, the tabletop upper shell 2, the tabletop lower shell 3, the link structure 4, and the angle adjustment mechanism 5 are assembled into a tabletop assembly. During the flipping process of the tabletop assembly, the tabletop frame 1 drives the angle adjuster 50 to rotate around the rotation shaft 52, and the rotation shaft 52 drives the transmission part 54 to move. When the large claw 55 is engaged with the ratchet wheel 541 under the drive of the large claw spring 552, the first plane 561 of the dial 56 contacts the bottom surface of the large claw 55, and the rotation shaft 52 is in a locked state. The tabletop frame 1 and the rotation shaft 52 are in a fixed state, thereby realizing the hovering of the tabletop assembly.

[0050] The unlocking working principle of the tabletop:

[0051] During the flipping process of the tabletop assembly, the button 58 is exposed on the tabletop upper shell 2 or the tabletop lower shell 3. After pressing the button 58, the button 58 drives the dial 56 to rotate. The first arc surface 562 of the dial 56 flips up to lift the large claw 55, and the large claw 55 leaves the ratchet wheel 541. At this time, the ratchet wheel 541 is unlocked, and the tabletop assembly can continue to be adjusted up or down at will. At the same time, after the second plane 563 rotates, it abuts against the inner surface of the small claw 59. Under the drive of the small claw spring 591, the small claw 59 and the second plane 563 are stationary, and the dial 56 is in a locked state to prevent the dial 56 from automatically rotating back; pressing the button 58 again can make the rotation shaft 52 in a locked state, realizing the hovering of the tabletop assembly.

[0052] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A seat back table structure capable of hovering at multiple angles, comprising a table frame, an upper shell of the table, a lower shell of the table, and a connecting rod structure for flipping, characterized in that: It also includes an angle adjustment mechanism for multi-angle adjustment, the connecting rod structure includes a connecting rod bracket connected to the chair back frame, a first connecting rod and a second connecting rod connected to the connecting rod bracket, one end of the second connecting rod is connected to the table board frame, the angle adjustment mechanism includes a rotating shaft, an angle adjuster connected to the rotating shaft and fixedly connected to the table board frame, the angle adjuster can be locked or unlocked with the rotating shaft at multiple angle positions, and the two ends of the rotating shaft are connected to the ends of the two first connecting rods.

2. The multi-angle hovering seat back table structure according to claim 1, characterized in that: The angle adjuster includes a shell, a first gear arranged on a rotating shaft, a transmission part connected to the first gear, a large claw connected to the transmission part for limiting the movement of the transmission part, a dial button connected to the large claw, a lever connected to the dial button, and a key connected to the lever. The transmission part includes a ratchet, and the large claw is provided with teeth meshing with the ratchet. The dial button is formed with a first plane and a first arc surface. When the first plane contacts the bottom surface of the large claw, the large claw meshes with the ratchet. When the first arc surface contacts the bottom surface of the large claw, the large claw leaves the ratchet.

3. The multi-angle hovering seat back table structure according to claim 2, characterized in that: The upper shell and the lower shell of the table top are both formed with button holes.

4. The multi-angle hovering seat back table structure according to claim 2, characterized in that: The transmission part comprises a plurality of transmission shafts, and gears for transmission are arranged on the transmission shafts.

5. The multi-angle hovering seat back table structure according to claim 2, characterized in that: The large claw is provided with a large claw spring for applying pressure to the large claw, and the button is provided with a button spring.

6. The multi-angle hovering seat back table structure according to claim 2, characterized in that: The angle adjuster comprises a left plate, a middle plate and a right plate, and the ratchet and the large claw are arranged between the middle plate and the right plate.

7. The multi-angle hovering seat back table structure according to claim 6, characterized in that: The left side plate is provided with a guide groove, and the guide groove is used to guide the movement of the shifting rod.

8. The multi-angle hovering seat back table structure according to claim 6, characterized in that: The dial button is arranged through the middle plate, and two ends of the dial button are rotatably connected with the left plate and the right plate.

9. The multi-angle hovering seat back table structure according to claim 2, characterized in that: The angle adjuster comprises a small claw and a small claw spring. The small claw is arranged opposite to the large claw and connected to the dial button. The small claw is used to lock the dial button.

10. The multi-angle hovering seat back table structure according to claim 9, characterized in that: A second plane is formed on the dial button. When the second plane contacts the inner surface of the small claw, the small claw locks the dial button under the drive of the small claw spring.

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