Backboard framework for seat, backrest board and seat

Abstract

The backrest plate framework comprises a table plate framework, the table plate framework comprises a table plate, a swing arm and an adjusting and grade-changing mechanism, one end of the swing arm is hinged to the table plate, an adjusting portion of the adjusting and grade-changing mechanism is installed on the table plate, the adjusting and grade-changing mechanism comprises an acting end, and the acting end is hinged to the table plate. The backrest plate framework further comprises a fixing plate and a clamping mechanism used for clamping the backrest plate framework on a seat framework, the other end of the swing arm is hinged to the fixing plate, and the clamping mechanism is fixedly arranged below the fixing plate. The backrest plate framework provided by the utility model can be directly clamped on a seat framework, and is convenient to disassemble and assemble.

Description

Technical Field

[0001] This utility model belongs to the technical field of accessories for transportation vehicles, and particularly relates to a backrest frame, backrest, and seat for use as a seat. Background Technology

[0002] Backrest panels in existing vehicles typically include seat trays, which are convenient components installed behind the front seats to provide passengers with a platform for eating, working, or placing items while the vehicle is in motion. These trays are usually installed behind the front seats. They are foldable, allowing them to be folded away when not in use, saving interior space.

[0003] However, existing backrest panels all require screw assemblies for installation and removal, which is inconvenient. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model proposes a backrest frame for a seat that can be directly snapped onto the seat frame for easy assembly and disassembly.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A backrest frame for a seat includes a table frame, wherein the table frame includes a table, a swing arm, and an adjustment mechanism, one end of the swing arm is hinged to the table, the adjustment part of the adjustment mechanism is mounted on the table, and the adjustment mechanism includes an action end, the action end abutting against the swing arm at different positions.

[0007] It also includes a fixing plate and a locking mechanism for engaging the backrest frame to the seat frame. The other end of the swing arm is hinged to the fixing plate, and the locking mechanism is fixedly disposed below the fixing plate.

[0008] Preferably, the locking mechanism includes a back plate bracket and two locking tongue latches arranged opposite each other below the back plate bracket. A fixing plate is fixedly connected to the top of the back plate bracket. The locking tongue latches include a first limiting plate, a second limiting plate, a moving rod, and a slider partially disposed in the channel of the second limiting plate and movably connected to the channel. One end of the moving rod is fixed to the slider, and the other end of the moving rod passes through the first limiting plate and the back plate bracket in sequence and is slidably connected to the fixing plate. An elastic element is provided on the moving rod, and the two ends of the elastic element abut against the first limiting plate and the slider, respectively.

[0009] Preferably, the adjusting part is an adjusting wheel, and the adjusting variable stage mechanism further includes a transmission rod and a variable stage component, with the actuating end located on the variable stage component;

[0010] The adjusting wheel is movably connected and installed on the table, the variable stage component is located on the inner side of the swing arm, the two ends of the transmission rod are respectively hinged to the adjusting wheel and the variable stage component, and one end of the variable stage component is movably latched onto the table.

[0011] Preferably, the tabletop is provided with a side plate, and a through hole is formed on the side plate, through which the working end of the variable step component passes.

[0012] Preferably, the outer side of the adjusting wheel is provided with a gear-shaped turning part.

[0013] Preferably, the tabletop is also provided with a top column on one side of the adjusting wheel.

[0014] Preferably, there are two swing arms, which are hinged to each other on both sides of the table, and the adjusting mechanism has two working ends.

[0015] Preferably, the actuating end has a stepped structure.

[0016] This utility model also provides a backrest panel, which includes the backrest panel frame of the above-mentioned technical solution.

[0017] This utility model further provides a seat, which includes the backrest panel of the above-described technical solution.

[0018] The beneficial effects of this utility model are:

[0019] This utility model proposes a backrest frame, a backrest, and a seat for use as a chair. The backrest frame includes a table frame, which is a combination of a table, a swing arm, and an adjustment mechanism. It allows the user to adjust the adjustment part of the adjustment mechanism so that different positions of the action end of the adjustment mechanism abut against the swing arm. Different positions of the action end can change the angle between the swing arm and the table, thereby adjusting the angle of the table. The user can adjust the angle of the table according to actual needs. This utility model also includes a locking mechanism for engaging the backrest frame onto the seat frame, so that the backrest frame can be directly engaged onto the seat frame, facilitating the assembly and disassembly of the table. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 Three-dimensional backrest frame Figure 1 ;

[0022] Figure 2 Three-dimensional backrest frame Figure 2 ;

[0023] Figure 3 A three-dimensional view of the backrest frame when the elastic elements are separated;

[0024] Figure 4 Left view of the backrest frame;

[0025] Figure 5 A three-dimensional view of the adjusting wheel in the variable-stage mechanism;

[0026] Figure 6 A three-dimensional view of the variable stage component in the variable stage mechanism for adjustment.

[0027] In the picture:

[0028] 1. Tabletop; 11. Side panel; 12. Top column; 2. Swing arm; 21. First connecting rod; 22. Second connecting rod; 3. Adjustment and variable speed mechanism; 31. Adjusting wheel; 311. Rotating part; 312. Groove; 32. Transmission rod; 33. Variable speed component; 34. Actuating end;

[0029] 4. Fixing plate; 41. Limiting hole;

[0030] 5. Engaging mechanism; 51. Backplate bracket; 52. Locking tongue buckle; 521. First limiting plate; 522. Second limiting plate; 523. Moving rod; 5231. First rod; 5232. Second rod; 524. Slider; 5241. Base plate; 5242. First side; 52421. Edge of the first side; 5243. Arc-shaped surface; 525. Elastic element. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Example 1

[0034] like Figure 1-6 As shown, this embodiment provides a backrest frame for a seat. The backrest frame includes a table frame, wherein the table frame includes a table 1, a swing arm 2, and an adjustment mechanism 3. One end of the swing arm 2 is hinged to the table 1. The adjustment part of the adjustment mechanism 3 is installed on the table 1. The adjustment mechanism 3 includes an action end 34, wherein when the adjustment part is adjusted, different positions of the action end 34 abut against the swing arm 2 to fix the included angle between the swing arm 2 and the table 1.

[0035] In addition, the backrest frame also includes a fixing plate 4 and a locking mechanism 5 for engaging the backrest frame to the seat frame. The other end of the swing arm 2 is hinged to the fixing plate 4, and the locking mechanism 5 is fixedly disposed below the fixing plate 4. Specifically, the swing arm 2 is composed of a first connecting rod 21 and a second connecting rod 22. One end of the first connecting rod 21 and the second connecting rod 22 are respectively hinged to the table 1, and the other end of the first connecting rod 21 and the second connecting rod 22 are respectively hinged to the fixing plate 4, thereby forming a structure in which the swing arm 2 is hinged to both the table 1 and the fixing plate 4.

[0036] This embodiment features an adjustable level mechanism that allows users to adjust the tabletop angle. When the tabletop angle needs adjustment, the user can adjust the adjustment part so that different positions of the action end 34 abut against the swing arm 2. Different positions of the action end 34 can change the angle between the swing arm 2 and the tabletop 1, allowing the user to adjust the tabletop tilt angle according to actual needs. In addition, this embodiment features a locking mechanism 5 that allows the backrest frame to be directly locked onto the seat frame without the need for screws, making assembly and disassembly very convenient.

[0037] Furthermore, the locking mechanism 5 includes a back plate support 51 and two locking tongue latches 52 arranged opposite each other below the back plate support 51. A fixed plate 4 is fixedly connected to the top of the back plate support 51. The locking tongue latches 52 include a first limiting plate 521, a second limiting plate 522, a moving rod 523, and a slider 524 partially disposed in the channel of the second limiting plate 522 and movably connected to the channel. One end of the moving rod 523 is fixedly connected to the slider 524, and the other end of the moving rod 523 passes through the first limiting plate 521 and the back plate support 51 in sequence, and is slidably connected to the fixed plate 4. An elastic element 525 is sleeved on the moving rod 523. The two ends of the elastic element 525 abut against the first limiting plate 521 and the slider 524 respectively, so that when the slider 524 is pushed to move relative to the channel, the other end of the moving rod 523 can slide relative to the fixed plate 4.

[0038] Specifically: A fixing plate 4 is fixedly connected to one side of the upper part of the back plate bracket 51, and another fixing plate 4 is fixedly connected to the other side of the upper part of the back plate bracket 51. The moving rod 523 includes a first rod 5231 and a second rod 5232 perpendicular to the first rod 5231. One end of the first rod 5231 is fixed to the base plate 5241 of the slider 524. The slider 524 can move back and forth in the channel (not shown in the figure) of the second limiting plate 522. An elastic element 525 is sleeved on the first rod 5231, and the two ends of the elastic element 525 are respectively The second rod 5232 (i.e., the other end of the moving rod 523) abuts against the first limiting plate 521 and the base plate 5241. One end 52321 of the second rod 5232 (i.e. the other end of the moving rod 523) passes through the holes on the first limiting plate 521, the back plate bracket 51 and the limiting hole 41 on the fixed plate 4 in sequence. When the slider 524 is pushed, one end of the second rod 5232 can be pushed back and forth in the limiting hole 41. At this time, the elastic element 525 is compressed. When no force is applied to the slider 524, the elastic force of the elastic element 525 will cause the slider 524 to reset, and the moving rod 523 will also return to its original position. Additionally, the base plate 5241 of the slider 524 extends outward from the edge (not marked in the figure) near the backrest support 51, forming a first side surface 5242. The edge 5242 of the first side surface 5242, away from the second limiting plate 522, extends towards the base plate 5241 and has an arc-shaped surface 5243. When the backrest frame needs to be engaged with the seat frame (not shown in the figure), the lowest point of the arc-shaped surface 5243 contacts the left and right support rods (not shown in the figure) of the seat frame, applying pressure to the backrest frame. This pressure, in turn, applies pressure to the arc-shaped surface 5243, thus pushing the slider 524 towards the first limiting plate 521, thereby pushing the second rod 52. One end of 32 moves in the limiting hole 41, thereby causing the support rod to move from contact with the arc surface 5243 to above the first side surface 5242, and the bottom of the support rod abuts against the first side surface 5242, thereby locking the backrest frame onto the seat frame. At this time, both the slider 524 and the moving rod 523 are reset. In this embodiment, the elastic element 524 is a spring. When it is necessary to remove the backrest frame, one end 53321 of the second rod 5232 is moved to move in the limiting hole 41, so that both the slider 524 and the moving rod 523 move towards the first limiting plate 521, and the support rod no longer abuts against the slider, so that the backrest frame can be removed from the seat frame.

[0039] It should be noted that, in this embodiment, as Figure 2 As shown, in the locking mechanism 5, the moving rod 523 in the locking tongue 52 moves left and right relative to the fixed plate 4 (to... Figure 2 (view angle), so that the locking tongue buckle 52 engages with the left and right sides of the seat frame. Of course, besides... Figure 2 In addition to the direction of the locking tongue latch 52, the locking tongue latch 52 can also be set to be in the same direction as the locking tongue. Figure 2Compared to the previous version, the left locking latch 52 rotates 90° clockwise and the right locking latch 52 rotates 90° counterclockwise, so that both sliders 524 face upwards. This allows the moving rod 523 in the locking latch 52 to move up and down relative to the fixed plate 4, so that the locking latch 52 engages with the upper support frame of the seat frame.

[0040] Furthermore, the adjustment part is an adjustment wheel 31, and the adjustment variable-stage mechanism 3 also includes a transmission rod 32 and a variable-stage component 33, with the actuating end 34 located on the variable-stage component 33. The adjustment wheel 31 is movably connected and mounted on the tabletop 1, and the variable-stage component 33 is located inside the swing arm 2. Both ends of the transmission rod 32 are hinged to the adjustment wheel 31 and the variable-stage component 33, respectively. One end of the variable-stage component 33 is movably engaged with the tabletop 1. When the adjustment wheel 31 is rotated, the variable-stage component 33 moves in a straight line, and the different positions of the actuating end 34 abut against the swing arm 2, thereby fixing the angle between the swing arm 2 and the tabletop 1. This combination structure is more convenient and precise in operation. The adjustment wheel 31 is movably connected to the tabletop, and the user can drive the transmission rod 32 by simply rotating the adjustment wheel 31, thereby causing the variable-stage component 33 to move in a straight line. The straight line direction causes the different positions of the actuating end 34 to abut against the swing arm 2. Because it is a linear movement, the contact state between the actuating end 34 and the swing arm 2 is clearer, making it easier to design the desired adjustment effect. Furthermore, since the two ends of the transmission rod 32 are hinged to the adjusting wheel 31 and the variable-stage component 33 respectively, this design makes the force transmission smoother, reduces energy loss, and also enhances the durability of the mechanism. Therefore, this design of the adjustable variable-stage mechanism not only improves the adjustment accuracy of the backrest frame, but also enhances its stability and service life, making it a further preferred option.

[0041] Preferably, the tabletop 1 has side plates 11 on both sides, with through holes (not shown in the figure) on the side plates 11 through which the actuating end 34 of the variable-speed component 33 passes. In this embodiment, the design of the side plates 11 increases the strength of the backrest frame, making the entire support more stable. At the same time, the through holes on the side plates 11 allow the actuating end of the variable-speed component 33 to pass through, which makes the linear movement of the variable-speed component 33 smoother and ensures more precise contact between the actuating end 34 and the swing arm 2.

[0042] Preferably, the outer side of the adjustment wheel 31 is provided with a gear-shaped rotating part 311. The gear-shaped rotating part 311 increases the friction between the adjustment wheel 1 and the finger, so that the user can feel obvious resistance feedback when adjusting, thus making it more tactile and easier to control the adjustment force.

[0043] Preferably, a top post 12 is also provided on one side of the adjusting wheel 31 on the table 1. The top post 12 serves to prevent the adjusting wheel from rotating in other directions, thus better preventing the adjusting wheel 31 from over-rotating. In order to better increase the contact area of ​​the rotating part 311, a groove 312 is provided on the inner side of the adjusting wheel 31. When the adjusting wheel 31 is about to over-rotate, the top post 12 and the groove 312 abut against each other.

[0044] Preferably, two swing arms 2 are provided, each hinged to one of the side plates 11 on either side of the tabletop 1. Two actuating ends 34 of the adjustment mechanism 3 are also provided. The double swing arm design distributes the pressure on the backrest frame more evenly. Simultaneously, the hinged connection of the two swing arms 2 to the side plates 11 on either side of the tabletop 1 ensures the tabletop 1 maintains a more balanced and stable state when adjusting its angle. The introduction of the double adjustment mechanism further improves the adjustment precision and flexibility of the tabletop 1. By adjusting the positions of the actuating ends 34 of the two adjustment mechanisms 3, the angle between the two swing arms and the tabletop 1 can be controlled more precisely, thus achieving accurate adjustment of the tabletop 1's angle. This design not only improves the comfort of using the tabletop but also meets the needs and preferences of different users. Furthermore, the double swing arm and double adjustment mechanism design enhances the durability and reliability of the backrest frame. Due to more even force distribution and more precise adjustment, the backrest frame is less prone to loosening or deformation during long-term use, thereby extending its service life.

[0045] Preferably, the actuating end 34 has a stepped structure. This stepped design means that when adjusting the angle of the tabletop 1, the adjustable mechanism can achieve multiple selectable and precise contact points with the swing arm 2. This design allows the tabletop 1 to achieve better results during adjustment, ensuring that it can be adjusted to different angles and maintain a stable support state. When the stepped actuating end 34 abuts against the swing arm 2, it also forms multiple support points. These support points work together to significantly enhance the load-bearing capacity of the backrest frame. In this embodiment, the actuating end 34 has a three-layer stepped structure, which meets the current usage requirements.

[0046] Example 2

[0047] An embodiment of this utility model also proposes a backrest panel, including the backrest panel frame of Embodiment 1 above and a shell. The shell covers the tabletop of the backrest panel frame. The backrest panel can be snapped onto the seat frame by a snap-fit ​​mechanism, eliminating the need for screw components for installation and making assembly and disassembly convenient. For user convenience, the adjustment part of the adjustment mechanism is preferably exposed outside the shell.

[0048] Example 3

[0049] This utility model embodiment also proposes a seat, including the backrest of the above embodiment 2, which has the same technical advantages as the table.

[0050] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. A backrest frame for a seat, characterized in that, The backrest frame includes a table frame, which includes a table (1), a swing arm (2), and an adjustment mechanism (3). One end of the swing arm (2) is hinged to the table (1). The adjustment part of the adjustment mechanism (3) is installed on the table (1). The adjustment mechanism (3) includes an action end (34), and different positions of the action end (34) abut against the swing arm (2). It also includes a fixing plate (4) and a locking mechanism (5) for locking the backrest frame onto the seat frame. The other end of the swing arm (2) is hinged to the fixing plate (4), and the locking mechanism (5) is fixedly disposed below the fixing plate (4).

2. The backrest frame according to claim 1, characterized in that, The locking mechanism (5) includes a back plate bracket (51) and two locking tongue buckles (52) arranged opposite each other below the back plate bracket (51). A fixing plate (4) is fixedly connected to the top of the back plate bracket (51). The locking tongue buckles (52) include a first limiting plate (521), a second limiting plate (522), a moving rod (523), and a slider (524) partially disposed in the channel of the second limiting plate (522) and movably connected to the channel. One end of the moving rod (523) is fixed to the slider (524), and the other end of the moving rod (523) passes through the first limiting plate (521) and the back plate bracket (51) in sequence and is slidably connected to the fixing plate (4). An elastic element (525) is provided on the moving rod (523), and the two ends of the elastic element (525) abut against the first limiting plate (521) and the slider (524) respectively.

3. The backrest frame according to claim 1, characterized in that, The adjustment part is an adjustment wheel (31), and the adjustment variable stage mechanism (3) also includes a transmission rod (32) and a variable stage component (33), with the action end (34) located on the variable stage component (33); The adjusting wheel (31) is movably connected to the table (1), the variable stage component (33) is located inside the swing arm (2), the two ends of the transmission rod (32) are respectively hinged to the adjusting wheel (31) and the variable stage component (33), and one end of the variable stage component (33) is movably engaged on the table (1).

4. The backrest frame according to claim 3, characterized in that: The tabletop (1) is provided with a side plate (11), and a through hole is opened on the side plate (11), through which the working end (34) passes.

5. The backrest frame according to claim 3, characterized in that: The outer side of the adjusting wheel (31) is provided with a gear-shaped turning part (311).

6. The backrest frame according to claim 3, characterized in that: The tabletop (1) is also provided with a top column (12) on one side of the adjusting wheel (31).

7. The backrest frame according to claim 1, characterized in that: There are two swing arms (2), and the two swing arms (2) are respectively hinged to the two sides of the table (1); The regulating variable stage mechanism (3) has two working ends (34).

8. The backrest frame according to claim 1, characterized in that: The functional end (34) has a stepped structure.

9. A backrest panel, characterized in that: The backrest panel includes the backrest panel frame as described in any one of claims 1-8.

10. A type of seat, characterized in that, The seat includes the backrest panel as described in claim 9.

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