Manual table board mounted on seat backrest

Abstract

The utility model discloses a manual table board installed on a seat backrest, which comprises a backrest assembly, a table board assembly, connecting rod mechanisms and a locking mechanism, the left side and the right side of the table board assembly are respectively connected with the backrest assembly through the connecting rod mechanisms, and each connecting rod mechanism comprises an upper connecting rod assembly, a lower connecting rod assembly and a table board installation support. The upper connecting rod assembly and the lower connecting rod assembly are both hinged between the table plate assembly and the table plate mounting support, the table plate mounting support is fixed to the backrest assembly, the backrest assembly is provided with an avoiding hole for the connecting rod mechanism to move, a shielding structure is integrated on the connecting rod mechanism, and after the locking mechanism is unlocked, the table plate assembly turns backwards to drive the connecting rod mechanism to be linked. Therefore, the folding state can be turned to the opening state, and the shielding structure is linked with the folding state and can shield the avoiding hole when the table plate assembly is opened. The table board assembly is unfolded and folded through movement of the connecting rods, the structure is simple, operation is convenient, the connecting rod mechanism and the shielding structure are designed in an integrated mode, and assembling procedures are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile seats, in particular to a manual table board installed on a seat back. Background Art

[0002] In order to meet more usage needs, many cars are equipped with small tables, especially in business cars. Most small tables are foldable and are usually installed on the backrest of the front seat. With the upgrading of consumption levels, people are increasingly pursuing a more advanced car experience. However, the traditional small table has a relatively simple structure, and it is not convenient to stretch the legs when the small table is unfolded. The patent with publication number CN115366767A discloses a folding table installed on a car seat. Although the folding table solves the problem of space occupied by connecting rods and table boards in the past, the folding table has many parts and components, making it difficult to disassemble and repair, and the shielding structure thereon is complex and has many assembly processes. Utility Model Content

[0003] In view of the problems existing in the above-mentioned prior art, the utility model aims to provide a manual table top installed on the seat back, so as to solve the problem that the existing folding table top has many parts and a complex shielding structure.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a manual table top installed on a seat backrest, comprising a backrest assembly, a table top assembly and a connecting rod mechanism, the left and right sides of the table top assembly are respectively connected to the backrest assembly through the connecting rod mechanism, a locking mechanism is arranged between the table top assembly and the backrest assembly, the connecting rod mechanism comprises an upper connecting rod assembly, a lower connecting rod assembly and a table top mounting bracket, the upper connecting rod assembly and the lower connecting rod assembly are both hinged between the table top assembly and the table top mounting bracket, the table top mounting bracket is fixed to the backrest assembly, the backrest assembly is provided with an avoidance hole for the movement of the connecting rod mechanism, a shielding structure is integrated on the connecting rod mechanism, when the locking mechanism is unlocked, the table top assembly flips backward to drive the connecting rod mechanism to work in conjunction, thereby being able to flip from a folded state to an open state, and the shielding structure is linked therewith to block the avoidance hole when the table top assembly is opened.

[0005] In the above solution: the backrest assembly includes a backrest body and an inner snap outer plate. An installation groove is provided on the back surface of the backrest body. The table board mounting bracket is fixed in the installation groove. The inner snap outer plate is snap-fitted on the backrest body to cover the installation groove. The avoidance hole is provided on the inner snap outer plate to avoid the movement of the upper link assembly and the lower link assembly. Both the upper link assembly and the lower link assembly include corresponding links. The shielding structure includes a shielding plate provided for each link. The front end of the link is bent downward to form a bent portion. The shielding plate is hinged on the bent portion and is located in the installation groove, and corresponds to the avoidance hole front and back. A torsion spring is provided between the shielding plate and the bent portion. The torsion spring has a torsion force for driving the shielding plate to flip backward. The shielding plate is also equipped with a limiting structure. When the table board assembly flips backward from the folded state, the shielding plate can flip backward together with the link until it is blocked by the limiting structure. At this time, when the table board assembly continues to flip backward to the open state, the shielding plate is pressed against the limiting structure by the torsion force of the torsion spring, thereby blocking the avoidance hole.

[0006] The shielding plate is provided with a limiting point for abutting against the bent portion to limit the backward flipping of the shielding plate relative to the bent portion. Limited by the limiting point, the shielding plate can only flip forward relative to the bent portion. When the table board assembly flips backward from the folded state, the shielding plate flips backward together with the link until it is blocked by the limiting structure. When the table board assembly continues to flip backward, the bent portion also flips backward, and the shielding plate remains stationary, that is, the shielding plate flips forward relative to the bent portion, and the torsion spring is compressed by force, thereby pressing the shielding plate against the limiting structure. When the table board assembly flips forward from the open state, the torsion force of the torsion spring gradually decreases until the shielding plate is separated from the limiting structure. At this time, the shielding plate flips forward together with the link, and finally the table board assembly flips to the folded state.

[0007] The four shielding plates form a shielding structure, which plays a role of closing and shielding the avoidance hole when the table board assembly is opened, which is beneficial to ensuring safety and can also increase the aesthetics of the seat backrest.

[0008] In the above solution: the table board assembly includes a table board skeleton and a table board outer shell wrapped outside the table board skeleton. The upper link assembly includes an upper link, and the lower link assembly includes a lower link. The rear ends of the upper link and the lower link are both hinged at the lower end of the table board skeleton, and the two hinge points are spaced apart. The table board outer shell is provided with installation holes for the upper link and the lower link to pass through. That is, the corresponding link of the upper link assembly is the upper link, and the corresponding link of the lower link assembly is the lower link. The table board skeleton of the table board assembly is an integral body, which has good stability, is convenient for assembly, simplifies the structure of the traditional table board assembly, and solves the appearance defect of too many appearance lines on the concave surface of the table board after it is unfolded.

[0009] In the above solution: a damper is provided at the installation position of the upper link corresponding to the table board skeleton. The rear end of the upper link is fixedly sleeved on the damper. By adding a damper, it plays a buffering role when the table board assembly flips.

[0010] In the above solution: The damper is equipped with a stepped bolt. One end of the damper is fixed to the tabletop skeleton by a screw. The other end of the damper is provided with a bolt hole. The stepped bolt passes through the tabletop skeleton and is locked in the bolt hole. The stepped bolt is movably matched with the tabletop skeleton. The installation structure is simple and the assembly is convenient.

[0011] In the above solution: The limiting structure includes a limiting pressing piece fixed on the backrest assembly and a limiting piece pressed below the limiting pressing piece. Both the limiting piece and the limiting pressing piece are located in the installation groove. The limiting piece and the limiting pressing piece are in clearance fit. The limiting piece is used to resist the shielding plate. The width of the shielding plate is greater than the width of the connecting rod, so the limiting piece can only limit the shielding plate and does not interfere with the movement of the connecting rod; the limiting piece can be manually moved. During installation, the limiting piece is pushed out to the movement path of the shielding plate to realize the resistance to the shielding plate.

[0012] The traditional shielding plate is not equipped with a limiting structure and only controls the shielding at the avoidance hole through the torsion of the torsion spring. After long-term use of the torsion spring, its torsion will change. Excessive or too small torsion will cause the shielding plate to flip too much or flip insufficiently, resulting in appearance defects. Adding a limiting structure is convenient to solve the above problems.

[0013] In the above solution: The front ends of the upper connecting rod and the lower connecting rod are both hinged to the tabletop mounting bracket through the cooperation of a pin and a snap ring. The upper connecting rod is hinged to the upper end of the tabletop mounting bracket, and the lower connecting rod is hinged to the lower end of the tabletop mounting bracket. The torsion spring is sleeved on the corresponding pin, one end of which is lapped on the corresponding connecting rod and the other end is lapped on the shielding plate. The rear end of the lower connecting rod is also hinged to the tabletop skeleton through the cooperation of a pin and a snap ring. The pin connection and assembly method is simple, which is beneficial to reducing the number of parts, avoiding the difficulties in disassembly, installation and maintenance caused by the fastening of spline pins, and is beneficial to reducing costs and the weight of parts, and is also beneficial to controlling the manufacturing precision of the corresponding connecting rod and the shielding plate.

[0014] A bushing is provided between all pins and the corresponding components to reduce noise and wear.

[0015] The tabletop mounting bracket can be designed to be smaller to save the structural space, assembly space, part size and cost of the tabletop mounting bracket; the tabletop mounting bracket is designed as a stamping stainless steel, and the part size and cost are much lower than those of the traditional aluminum alloy tabletop mounting bracket.

[0016] In the above solution: A shielding chrome-plated part is clamped at the installation hole. The upper connecting rod and the lower connecting rod pass through the shielding chrome-plated part and are hinged to the tabletop skeleton. The shielding chrome-plated part plays a role in covering up defects and protection.

[0017] In the above solution: two receiving cavities are sunken in the installation groove, and the two table board mounting brackets are respectively fixed in the two receiving cavities by bolts. The shielding plate is located in the receiving cavity, and arranging the receiving cavity is beneficial to providing a movement space for the shielding plate.

[0018] The beneficial effects of the present utility model are as follows: the overall structure has fewer components, and the opening and folding of the table board assembly are realized through the movement of the connecting rod. The structure is simple and the operation is convenient; the integrated design of the connecting rod mechanism and the shielding structure effectively reduces the assembly process and improves the assembly accuracy; the shielding structure is linked with the connecting rod mechanism and can automatically block the avoidance hole when the table board assembly is opened. The design is ingenious and is beneficial to ensuring the safety and aesthetics of the seat back. Description of the Drawings

[0019] Figure 1 is a schematic diagram of the table board assembly in the opened state.

[0020] Figure 2 is a schematic diagram of the structure of the upper connecting rod assembly and the lower connecting rod assembly.

[0021] Figure 3 is a schematic diagram of the structure of the table board mounting bracket.

[0022] Figure 4 is an installation schematic diagram of the shielding plate.

[0023] Figure 5 is a schematic diagram of the structure of the inner snap outer plate.

[0024] Figure 6 is an internal schematic diagram of the installation groove.

[0025] Figure 7 is Figure 6 a partial enlarged schematic diagram of

[0026] Figure 8 is an installation schematic diagram of the damper.

[0027] Figure 9 is an exploded schematic diagram of the table board assembly.

[0028] Figure 10 is an exploded schematic diagram of the connecting rod mechanism.

[0029] Figure 11 is an exploded schematic diagram of the backrest assembly. Detailed Description of the Invention

[0030] As Figure 1 —11 shows, a manual table board installed on a seat back mainly consists of a backrest assembly A, a table board assembly B, and a connecting rod mechanism.

[0031] The left and right sides of the table top assembly B are connected to the backrest assembly A through a connecting rod mechanism, and a locking mechanism is provided between the table top assembly B and the backrest assembly A.

[0032] The connecting rod mechanism includes an upper connecting rod assembly 1, a lower connecting rod assembly 2 and a table board mounting bracket 3. The upper connecting rod assembly 1 and the lower connecting rod assembly 2 are both hinged between the table board assembly B and the table board mounting bracket 3. The table board mounting bracket 3 is fixed on the backrest assembly A. The backrest assembly A is provided with an avoidance hole 4 for the movement of the connecting rod mechanism, and a shielding structure is integrated on the connecting rod mechanism. When the locking mechanism is unlocked, the table board assembly B flips backward to drive the connecting rod mechanism to work together, so that it can flip from a folded state to an open state, and the shielding structure is linked to cover the avoidance hole 4 when the table board assembly B is opened. The open state of the table board assembly B is the use state of flipping to a horizontal position, and the folded state of the table board assembly B is the state of being attached to the backrest assembly A.

[0033] Preferably, the backrest assembly A includes a backrest body 5 and an inner buckled outer panel 6, the back of the backrest body 5 is provided with a mounting groove 51, the table board mounting bracket 3 is fixed in the mounting groove 51, the inner buckled outer panel 6 is clamped on the backrest body 5 to cover the mounting groove 51, and the avoidance hole 4 is provided on the inner buckled outer panel 6 to avoid the movement of the upper connecting rod assembly 1 and the lower connecting rod assembly 2.

[0034] The upper connecting rod assembly 1 and the lower connecting rod assembly 2 both include corresponding connecting rods, and the shielding structure includes a shielding plate 7 provided corresponding to each connecting rod. The front end of the connecting rod is bent downward to form a bent portion a, and the shielding plate 7 is hinged on the bent portion a, and is located in the mounting groove 51, and corresponds to the avoidance hole 4 in front and back. A torsion spring 8 is provided between the shielding plate 7 and the bent portion a. The torsion spring 8 has a torsion force that drives the shielding plate 7 to flip backward, and the shielding plate 7 is also equipped with a limiting structure C. When the table board assembly B flips backward from a folded state, the shielding plate 7 can flip backward with the connecting rod until it is blocked by the limiting structure C. At this time, when the table board assembly B continues to flip backward to an open state, the shielding plate 7 is pressed against the limiting structure C by the torsion force of the torsion spring 8, thereby blocking the avoidance hole 4.

[0035] The baffle 7 is provided with a limit point b for abutting against the bent portion a to limit the backward flipping of the baffle 7 relative to the bent portion a. Restricted by the limit point b, the baffle 7 can only flip forward relative to the bent portion a. When the table assembly B flips backward from the folded state, the baffle 7 flips backward together with the connecting rod until it is blocked by the limiting structure C. When the table assembly 7 continues to flip backward, the bent portion a also flips backward, and the baffle 7 remains stationary, that is, the baffle 7 flips forward relative to the bent portion a (the limit point b changes from abutting to a separated state with the bent portion a), and the torsion spring 8 is compressed by force, thereby pressing the baffle 7 tightly against the limiting structure C. When the table assembly B flips forward from the opened state, the torsion force of the torsion spring 8 gradually decreases until the baffle 7 separates from the limiting structure C (at this time, the limit point b abuts against the bent portion a again). At this time, the baffle 7 flips forward together with the connecting rod, and finally the table assembly B flips to the folded state.

[0036] Four baffles 7 form a shielding structure, which plays a role of closing and shielding the avoidance holes 4 when the table assembly is opened, which is beneficial to ensuring safety and can also increase the aesthetics of the seat back.

[0037] Preferably, the table assembly B includes a table frame 9 and a table outer shell 10 covering the outside of the table frame 9. The upper connecting rod assembly 1 includes an upper connecting rod 11, the lower connecting rod assembly 2 includes a lower connecting rod 12. The rear ends of the upper connecting rod 11 and the lower connecting rod 12 are both hinged to the lower end of the table frame 9, and the two hinge points are arranged at intervals. The table outer shell 10 is provided with mounting holes for the upper connecting rod 11 and the lower connecting rod 12 to pass through. That is, the corresponding connecting rod of the upper connecting rod assembly 1 is the upper connecting rod 11, the corresponding connecting rod of the lower connecting rod assembly 2 is the lower connecting rod 12, and the table frame 9 of the table assembly B is an integral body, with good stability, convenient assembly, streamlining the structure of the traditional table assembly, and solving the appearance defect of excessive appearance lines on the concave surface of the table after it is unfolded.

[0038] Preferably, a damper 13 is provided at the installation position of the table frame 9 corresponding to the upper connecting rod 11, and the rear end of the upper connecting rod 11 is fixedly sleeved on the damper 13. By adding the damper 13, it plays a buffering role when the table assembly B flips.

[0039] Preferably, the damper 13 is equipped with a stepped bolt 14. One end of the damper 13 is fixed to the table frame 9 by screws. The other end of the damper 13 is provided with a bolt hole. The stepped bolt 14 passes through the table frame 9 and is locked in the bolt hole. The stepped bolt 14 is in movable cooperation with the table frame 9, and the installation structure is simple and the assembly is convenient.

[0040] Preferably, the limiting structure C includes a limiting pressing piece 15 fixed on the backrest assembly A and a limiting piece 16 pressed under the limiting pressing piece 15. Both the limiting piece 16 and the limiting pressing piece 15 are located in the installation groove 51, and the limiting piece 16 and the limiting pressing piece 15 are in clearance fit. The limiting piece 16 is used to resist the shielding plate 7. The width of the shielding plate 7 is greater than the width of the connecting rod, so the limiting piece 16 can only limit the shielding plate 7 without interfering with the movement of the connecting rod; the limiting piece 16 can be manually moved. During installation, the limiting piece 16 is pushed out to the movement path of the shielding plate 7 to realize the resistance to the shielding plate 7 (the resistance to the shielding plate 7 can be released after pushing the limiting piece 16 back).

[0041] The traditional shielding plate 7 is not equipped with the limiting structure C and is only controlled by the torsion of the torsion spring 8 to shield at the avoidance hole 4. After the torsion spring 8 is used for a long time, its torsion will change. Too large or too small torsion will cause the shielding plate 7 to flip excessively or insufficiently, resulting in appearance defects. Adding the limiting structure C is convenient for solving the above problems.

[0042] Preferably, the front ends of the upper connecting rod 11 and the lower connecting rod 12 are respectively hinged on the table board mounting bracket 3 through the cooperation of a pin and a snap ring. The upper connecting rod 11 is hinged to the upper end of the table board mounting bracket 3, and the lower connecting rod 12 is hinged to the lower end of the table board mounting bracket 3. The torsion spring 8 is sleeved on the corresponding pin, with one end lapped on the corresponding connecting rod and the other end lapped on the shielding plate 7. The rear end of the lower connecting rod 12 is also hinged to the table board framework 9 through the cooperation of a pin and a snap ring. The pin connection and assembly method is simple, which is beneficial to reducing the number of parts, avoiding the difficulties in disassembly, installation and maintenance caused by the fastening of spline pins, and is beneficial to reducing the cost and the weight of parts, and is beneficial to controlling the manufacturing precision of the corresponding connecting rod and the shielding plate 7.

[0043] Bushings are arranged between all pins and the corresponding components to reduce noise and wear.

[0044] The table board mounting bracket 3 can be designed to be smaller to save the structural space, assembly space, part size and cost of the table board mounting bracket 3; the table board mounting bracket 3 is designed as a stamping stainless steel, and both the part size and the cost are much lower than those of the traditional aluminum alloy table board mounting bracket.

[0045] Preferably, a shielding chrome-plated part 17 is clamped at the installation hole, and the upper connecting rod 11 and the lower connecting rod 12 pass through the shielding chrome-plated part 17 and are hinged to the table board framework 9. The shielding chrome-plated part 17 plays a role in covering up defects and protection.

[0046] Preferably, two accommodation cavities 52 are sunken in the installation groove 51, and the two table board mounting brackets 3 are respectively fixed in the two accommodation cavities 52 through bolts. The shielding plate 7 is located in the accommodation cavity 52. Arranging the accommodation cavity 52 is beneficial to providing a movement space for the shielding plate 7.

Claims

1. A manual table top installed on a seat back, comprising a backrest assembly (A), a table top assembly (B) and a connecting rod mechanism, wherein the left and right sides of the table top assembly (B) are respectively connected to the backrest assembly (A) through the connecting rod mechanism, and a locking mechanism is provided between the table top assembly (B) and the backrest assembly (A), characterized in that: The connecting rod mechanism comprises an upper connecting rod assembly (1), a lower connecting rod assembly (2) and a table board mounting bracket (3); the upper connecting rod assembly (1) and the lower connecting rod assembly (2) are both hinged between the table board assembly (B) and the table board mounting bracket (3); the table board mounting bracket (3) is fixed to the backrest assembly (A); the backrest assembly (A) is provided with an avoidance hole (4) for movement of the connecting rod mechanism; a shielding structure is integrated on the connecting rod mechanism; when the locking mechanism is unlocked, the table board assembly (B) flips backwards to drive the connecting rod mechanism to work in conjunction, thereby being able to flip from a folded state to an open state; the shielding structure is then linked to cover the avoidance hole (4) when the table board assembly (B) is opened.

2. The manual table board installed on the seat back according to claim 1, characterized in that: The backrest assembly (A) comprises a backrest body (5) and an inner buckle outer plate (6), the back of the backrest body (5) is provided with a mounting groove (51), the table board mounting bracket (3) is fixed in the mounting groove (51), the inner buckle outer plate (6) is clamped on the backrest body (5) for covering the mounting groove (51), the avoidance hole (4) is arranged on the inner buckle outer plate (6) to avoid the movement of the upper connecting rod assembly (1) and the lower connecting rod assembly (2), the upper connecting rod assembly (1) and the lower connecting rod assembly (2) both comprise corresponding connecting rods, the shielding structure comprises a shielding plate (7) arranged corresponding to each connecting rod, the front end of the connecting rod is bent downward to form a bending portion (a), the shielding The plate (7) is hinged on the bending portion (a) and is located in the installation groove (51) and corresponds to the avoidance hole (4) in front and back. A torsion spring (8) is arranged between the shielding plate (7) and the bending portion (a). The torsion spring (8) has a torsion force driving the shielding plate (7) to flip backward. The shielding plate (7) is also equipped with a limiting structure (C). When the table board assembly (B) flips backward from a folded state, the shielding plate (7) can flip backward together with the connecting rod until it is blocked by the limiting structure (C). At this time, when the table board assembly (B) continues to flip backward to an open state, the shielding plate (7) is pressed against the limiting structure (C) by the torsion force of the torsion spring (8), thereby blocking the avoidance hole (4).

3. The manual table board installed on the seat back according to claim 2, characterized in that: The table top assembly (B) comprises a table top frame (9) and a table top shell (10) covering the outer side of the table top frame (9); the upper connecting rod assembly (1) comprises an upper connecting rod (11); the lower connecting rod assembly (2) comprises a lower connecting rod (12); the rear ends of the upper connecting rod (11) and the lower connecting rod (12) are hinged to the lower end of the table top frame (9), and the two hinge points are spaced apart; the table top shell (10) is provided with a mounting hole for the upper connecting rod (11) and the lower connecting rod (12) to pass through.

4. The manual table board installed on the seat back according to claim 3, characterized in that: A damper (13) is provided at the installation position of the table top frame (9) corresponding to the upper connecting rod (11), and the rear end of the upper connecting rod (11) is fixedly sleeved on the damper (13).

5. The manual table board installed on the seat back according to claim 4, characterized in that: The damper (13) is equipped with a step bolt (14). One end of the damper (13) is fixed to the table frame (9) by a screw. The other end of the damper (13) is provided with a bolt hole. The step bolt (14) passes through the table frame (9) and is locked in the bolt hole. The step bolt (14) and the table frame (9) are movably matched.

6. The manual table board installed on the seat back according to claim 2, characterized in that: The limiting structure (C) comprises a limiting pressure piece (15) fixed on the backrest assembly (A) and a limiting piece (16) pressed under the limiting pressure piece (15), wherein the limiting piece (16) and the limiting pressure piece (15) are both located in the mounting groove (51), and the limiting piece (16) and the limiting pressure piece (15) are clearance-fitted, wherein the limiting piece (16) is used to resist the shielding plate (7).

7. The manual table board installed on the seat back according to claim 4, characterized in that: The front ends of the upper connecting rod (11) and the lower connecting rod (12) are both hinged to the table board mounting bracket (3) through the cooperation of a pin and a clamp ring. The upper connecting rod (11) is hinged to the upper end of the table board mounting bracket (3), and the lower connecting rod (12) is hinged to the lower end of the table board mounting bracket (3). The torsion spring (8) is sleeved on the corresponding pin, one end of which is overlapped on the corresponding connecting rod, and the other end is overlapped on the shielding plate (7). The rear end of the lower connecting rod (12) is also hinged to the table board frame (9) through the cooperation of a pin and a clamp ring.

8. The manual table board installed on the seat back according to claim 3, characterized in that: A shielding chrome-plated piece (17) is clamped at the installation hole, and the upper connecting rod (11) and the lower connecting rod (12) pass through the shielding chrome-plated piece (17) and are hinged to the table top frame (9).

9. The manual table board installed on the seat back according to claim 2, characterized in that: Two accommodating chambers (52) are sunken in the installation groove (51), and the two table top installation brackets (3) are fixed in the two accommodating chambers (52) one by one by bolts, and the shielding plate (7) is located in the accommodating chamber (52).

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