Simple and reliable internal drive small table plate four-connecting-rod mechanism

Abstract

The utility model relates to the technical field of small table plates of folding seats, in particular to a simple and reliable four-bar linkage mechanism for an internal driving small table plate, which comprises a mounting seat, a motor horizontally arranged at the top of the mounting seat, driving shafts respectively arranged at two ends of the motor and penetrating through the mounting seat, and hinge shafts respectively arranged on two sides of the bottom of the mounting seat. Upper shaft heads are arranged on the two sides of the middle of the table plate framework respectively, lower shaft heads are arranged on the two sides of the bottom of the table plate framework respectively, and the distance between the upper shaft heads and the lower shaft heads is smaller than the distance between the driving shaft and the hinged shaft; two ends of the lower steel arm are respectively hinged and matched with the lower shaft head and the hinge shaft; the top end of the upper steel arm is vertically connected with the driving shaft, the bottom end of the upper steel arm is hinged and matched with the upper shaft head, and the upper steel arm is longer than the lower steel arm; and the mounting seat, the table plate framework, the lower steel arm and the upper steel arm are all steel members. By means of the material characteristics of the mounting base, the table plate framework, the lower steel arm and the upper steel arm, high bearing stability is provided for the small table plate.

Description

Technical Field

[0001] This utility model relates to the field of folding seat and small table technology, specifically to a simple and reliable internal drive small table four-bar linkage mechanism. Background Technology

[0002] With the increasing demand for intelligent and comfortable vehicles, passenger car interiors are gradually evolving towards multi-functionality, space optimization, and human-centered design. Among these features, car seat tray tables, serving as auxiliary components for work, entertainment, or dining, are widely used in business vehicles, family MPVs, and long-distance travel scenarios. Currently, most tray tables using a four-link folding mechanism are made of aluminum alloy. While this material is lightweight, its load-bearing capacity is limited, and its manufacturing cost is relatively high, with a limited lifespan. Utility Model Content

[0003] This utility model provides a simple and reliable internally driven four-bar linkage mechanism for a small table, which provides high load-bearing stability for the small table by utilizing the material properties of the mounting base, table frame, lower steel arm, and upper steel arm.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a simple and reliable internally driven small table four-bar linkage mechanism, comprising: a mounting base, which is fixedly connected to the back of a seat via a positioning pin and mounting holes, and the mounting base has upper shaft heads at the top and lower shaft heads at the bottom on both sides; a table frame, which is disposed on the side of the mounting base away from the seat, and a motor is horizontally disposed at the bottom of the table frame, with drive shafts penetrating the table frame at both ends of the motor, and drive shafts on both sides of the middle of the table frame respectively. The device includes a hinge shaft, the distance between the hinge shaft and the drive shaft being less than the distance between the upper shaft head and the lower shaft head; a lower steel arm, one end of which is perpendicularly connected to the drive shaft, and the other end which engages with the lower shaft head through a shaft hole; an upper steel arm, both ends of which engage with the upper shaft head and the hinge shaft through shaft holes respectively, and the length of the upper steel arm is greater than the length of the lower steel arm; support springs are respectively provided in the middle of both sides of the mounting base corresponding to the upper steel arm; the mounting base, the table frame, the lower steel arm, and the upper steel arm are all steel components.

[0005] Preferably, both the upper steel arm and the lower steel arm have a wave-shaped structure, and the top ends of both the upper steel arm and the lower steel arm are offset towards the mounting base.

[0006] Preferably, the bottom of the upper steel arm is located on the side of the top of the lower steel arm away from the mounting base.

[0007] Preferably, a limiting groove is provided in the middle of the table frame corresponding to the bottom of the upper steel arm.

[0008] The advantages of this invention are as follows: The table frame is used to install a small table, and a mounting groove adapted to the small table is provided on the back of the vehicle seat. The mounting seat is installed in the mounting groove and externally concealed by a panel, improving the aesthetics of the external structure. The upper steel arm, lower steel arm, mounting seat, and table frame constitute a four-bar linkage mechanism. Through kinematic optimization design of the four-bar linkage mechanism, combined with the motor inside the table frame, the table frame is folded and fits snugly against the seat back. After folding, the support spring provides elastic support to the upper steel arm through its free end, thereby eliminating structural play and preventing abnormal noise. When the small table is unfolded, it can benefit from the material properties of the mounting seat, table frame, lower steel arm, and upper steel arm, providing high load-bearing stability. Whether folding or unfolding, the motor is controlled by an external control component, thus achieving one-button operation and significantly improving the user experience. Furthermore, since the motor is located inside the table frame, the requirements for the internal structure of the seat are reduced, meeting the requirements for retrofitting existing seats. Through the geometric design of the folding mechanism, it is ensured that the front end of the upper steel arm will not protrude above the surface of the small tabletop when the table frame is unfolded, thus not hindering use. When the table frame is folded, the upper and lower steel arms can reduce their footprint, avoiding any impact on the seating space. When the small tabletop is folded, the bottom of the upper steel arm folds into the limiting groove, and the abutment between the upper steel arm and the limiting groove eliminates any gaps in the folding mechanism, thereby preventing abnormal noise. Attached Figure Description

[0009] 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.

[0010] Figure 1 This is a schematic diagram of the front side of the overall structure of this utility model in its stored state;

[0011] Figure 2 This is a schematic diagram of the rear side of the overall structure of this utility model in its stored state;

[0012] Figure 3 This is a schematic diagram of the upper part of the overall structure of this utility model in its unfolded state;

[0013] Figure 4 This is a schematic diagram of the lower side of the overall structure of this utility model in its unfolded state.

[0014] In the diagram: 1. Mounting base; 2. Upper shaft head; 3. Lower shaft head; 4. Table frame; 5. Motor; 6. Drive shaft; 7. Hinge shaft; 8. Lower steel arm; 9. Upper steel arm; 10. Limiting groove; 11. Support spring. Detailed Implementation

[0015] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a simple and reliable internally driven four-bar linkage mechanism for a small table includes: a mounting base 1, which is fixedly connected to the back of a seat via positioning pins and mounting holes, and the top of both sides of the mounting base 1 is provided with an upper shaft head 2, and the bottom is provided with a lower shaft head 3; a table frame 4, which is located on the side of the mounting base 1 away from the seat, and a motor 5 is horizontally provided at the bottom of the table frame 4, with drive shafts 6 passing through the table frame 4 at both ends of the motor 5, and hinge shafts 7 are provided on both sides of the middle of the table frame 4, the hinge shafts 7 being connected to the back of the seat. The spacing between the drive shafts 6 is less than the spacing between the upper shaft head 2 and the lower shaft head 3; the lower steel arm 8 has one end perpendicularly connected to the drive shaft 6, and the other end cooperates with the lower shaft head 3 through a shaft hole; the upper steel arm 9 has both ends cooperating with the upper shaft head 2 and the hinge shaft 7 through shaft holes respectively, and the length of the upper steel arm 9 is greater than the length of the lower steel arm 8; the middle part of both sides of the mounting base 1 is respectively provided with supporting springs 11 corresponding to the upper steel arm 9; the mounting base 1, the table frame 4, the lower steel arm 8 and the upper steel arm 9 are all steel components.

[0017] In the above configuration, the table frame 4 is used to install the small table, and a mounting slot adapted to the small table is provided on the back of the vehicle seat. The mounting seat 1 is installed in the mounting slot and externally concealed by a panel to improve the aesthetics of the external structure. The upper steel arm 9, the lower steel arm 8, the mounting seat 1, and the table frame 4 constitute a four-bar linkage. Through the kinematic optimization design of the four-bar linkage, combined with the motor 5 inside the table frame 4, the table frame 4 is folded and fits against the back of the seat. After folding, the support spring 11 provides elastic support to the upper steel arm 9 through its free end, thereby eliminating structural play and preventing abnormal noise. When the small table is unfolded, it can benefit from the material properties of the mounting seat 1, the table frame 4, the lower steel arm 8, and the upper steel arm 9, providing high load-bearing stability. Whether folding or unfolding, the motor 5 is controlled by an external control component, thus achieving one-button operation and significantly improving the user experience. Furthermore, since the motor 5 is located inside the table frame 4, the requirements for the internal structure of the seat are reduced, meeting the requirements for retrofitting existing seats.

[0018] Both the upper steel arm 9 and the lower steel arm 8 have a wavy structure, and the top ends of both the upper steel arm 9 and the lower steel arm 8 are offset towards the mounting base 1. The bottom of the upper steel arm 9 is located on the side of the top of the lower steel arm 8 away from the mounting base 1.

[0019] Through the above geometric design, it is ensured that when the table frame 4 is unfolded, the front end of the upper steel arm 9 will not be higher than the surface of the small table, so as not to hinder the use. When the table frame 4 is folded, the upper steel arm 9 and the lower steel arm 8 can reduce the space occupied and avoid affecting the seating space.

[0020] The table frame 4 has a limiting groove 10 at the bottom of the upper steel arm 9.

[0021] With the above settings, when the small table is folded, the bottom of the upper steel arm 9 flips into the limiting groove 10, and the gap in the folding mechanism is eliminated by the abutment between the upper steel arm 9 and the limiting groove 10, thereby avoiding the generation of abnormal noise.

[0022] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A simple and reliable internal drive small table board four-bar linkage mechanism, characterized in that, The utility model relates to a kind of table board of seat, including: Mounting seat (1), the mounting seat (1) is fixedly connected with seat back by positioning pin and mounting hole, and the top of the two sides of the mounting seat (1) is equipped with upper shaft head (2), and the bottom is equipped with lower shaft head (3); Table plate framework (4), the table plate framework (4) is arranged in the side of the mounting seat (1) away from the seat, and the bottom of the table plate framework (4) is horizontally equipped with motor (5), the motor (5) is respectively equipped with driving shaft (6) passing through the table plate framework (4) both ends, the two sides of the middle part of table plate framework (4) are respectively equipped with hinged shaft (7), the interval of the hinged shaft (7) and the driving shaft (6) is less than the interval of the upper shaft head (2) and the lower shaft head (3); Lower steel arm (8), one end of the lower steel arm (8) is connected with the driving shaft (6) perpendicularly, and the other end is matched with the lower shaft head (3) by shaft hole; Upper steel arm (9), the two ends of the upper steel arm (9) are respectively matched with the upper shaft head (2) and the hinged shaft (7) by shaft hole, and the length of the upper steel arm (9) is greater than the length of the lower steel arm (8); The middle part of the two sides of the mounting seat (1) is respectively equipped with support spring piece (11) corresponding to the upper steel arm (9); The mounting seat (1), the table plate framework (4), the lower steel arm (8) and the upper steel arm (9) are all steel components.

2. A simple and reliable internally driven small table board four-bar linkage mechanism according to claim 1, characterized in that: The upper steel arm (9) and the lower steel arm (8) are all wave-shaped structure, and the top of the upper steel arm (9) and the lower steel arm (8) is offset to the direction of the mounting seat (1).

3. A simple and reliable internally driven small table board four-bar linkage mechanism according to claim 2, characterized in that: The bottom of the upper steel arm (9) is located in the top of the lower steel arm (8) side away from the mounting seat (1).

4. A simple and reliable internally driven table board four-bar linkage mechanism according to claim 3, characterized in that: The middle part of the table plate framework (4) is equipped with limiting groove (10) corresponding to the bottom of the upper steel arm (9). The utility model relates to a kind of table board of seat, including: Mounting seat (1), the mounting seat (1) is fixedly connected with seat back by positioning pin and mounting hole, and the top of the two sides of the mounting seat (1) is equipped with upper shaft head (2), and the bottom is equipped with lower shaft head (3); Table plate framework (4), the table plate framework (4) is arranged in the side of the mounting seat (1) away from the seat, and the bottom of the table plate framework (4) is horizontally equipped with motor (5), the motor (5) is respectively equipped with driving shaft (6) passing through the table plate framework (4) both ends, the two sides of the middle part of table plate framework (4) are respectively equipped with hinged shaft (7), the interval of the hinged shaft (7) and the driving shaft (6) is less than the interval of the upper shaft head (2) and the lower shaft head (3); Lower steel arm (8), one end of the lower steel arm (8) is connected with the driving shaft (6) perpendicularly, and the other end is matched with the lower shaft head (3) by shaft hole; Upper steel arm (9), the two ends of the upper steel arm (9) are respectively matched with the upper shaft head (2) and the hinged shaft (7) by shaft hole, and the length of the upper steel arm (9) is greater than the length of the lower steel arm (8); The middle part of the two sides of the mounting seat (1) is respectively equipped with support spring piece (11) corresponding to the upper steel arm (9); The mounting seat (1), the table plate framework (4), the lower steel arm (8) and the upper steel arm (9) are all steel components. The upper steel arm (9) and the lower steel arm (8) are all wave-shaped structure, and the top of the upper steel arm (9) and the lower steel arm (8) is offset to the direction of the mounting seat (1). The bottom of the upper steel arm (9) is located in the top of the lower steel arm (8) side away from the mounting seat (1). The middle part of the table plate framework (4) is equipped with limiting groove (10) corresponding to the bottom of the upper steel arm (9). The utility model relates to a kind of table board of seat, including: Mounting seat (1), the mounting seat (1) is fixedly connected with seat back by positioning pin and mounting hole, and the top of the two sides of the mounting seat (1) is equipped with upper shaft head (2), and the bottom is equipped with lower shaft head (3); Table plate framework (4), the table plate framework (4) is arranged in the side of the mounting seat (1) away from the seat, and the bottom of the table plate framework (4) is horizontally equipped with motor (5), the motor (5) is respectively equipped with driving shaft (6) passing through the table plate framework (4) both ends, the two sides of the middle part of table plate framework (4) are respectively equipped with hinged shaft (7), the interval of the hinged shaft (7) and the driving shaft (6) is less than the interval of the upper shaft head (2) and the lower shaft head (3); Lower steel arm (8), one end of the lower steel arm (8) is connected with the driving shaft (6) perpendicularly, and the other end is matched with the lower shaft head (3) by shaft hole; Upper steel arm (9), the two ends of the upper steel arm (9) are respectively matched with the upper shaft head (2) and the hinged shaft (7) by shaft hole, and the length of the upper steel arm (9) is greater than the length of the lower steel arm (8); The middle part of the two sides of the mounting seat (1) is respectively equipped with support spring piece (11) corresponding to the upper steel arm (9); The mounting seat (1), the table plate framework (4), the lower steel arm (8) and the upper steel arm (9) are all steel components. The upper steel arm (9) and the lower steel arm (8) are all wave-shaped structure, and the top of the upper steel arm (9) and the lower steel arm (8) is offset to the direction of the mounting seat (1). The bottom of the upper steel arm (9) is located in the top of the lower steel arm (8) side away from the mounting seat (1). The middle part of the table plate framework (4) is equipped with limiting groove (10) corresponding to the bottom of the upper steel arm (9). The utility model relates to a kind of table board of seat, including: Mounting seat (1), the mounting seat (1) is fixedly connected with seat back by positioning pin and mounting hole, and the top of the two sides of the mounting seat (1) is equipped with upper shaft head (2), and the bottom is equipped with lower shaft head (3); Table plate framework (4), the table plate framework (4) is arranged in the side of the mounting seat (1) away from the seat, and the bottom of the table plate framework (4) is horizontally equipped with motor (5), the motor (5) is respectively equipped with driving shaft (6) passing through the table plate framework (4) both ends, the two sides of the middle part of table plate framework (4) are respectively equipped with hinged shaft (7), the interval of the hinged shaft (7) and the driving shaft (6) is less than the interval of the upper shaft head (2) and the lower shaft head (3); Lower steel arm (8), one end of the lower steel arm (8) is connected with the driving shaft (6) perpendicularly, and the other end is matched with the lower shaft head (3) by shaft hole; Upper steel arm (9), the two ends of the upper steel arm (9) are respectively matched with the upper shaft head (2) and the hinged shaft (7) by shaft hole, and the length of the upper steel arm (9) is greater than the length of the lower steel arm (8); The middle part of the two sides of the mounting seat (1) is respectively equipped with support spring piece (11) corresponding to the upper steel arm (9); The mounting seat (1), the table plate framework (4), the lower steel arm (8) and the upper steel arm (9) are all steel components. The upper steel arm (9) and the lower steel arm (8) are all wave-shaped structure, and the top of the upper steel arm (9) and the lower steel arm (8) is offset to the direction of the mounting seat (1). The bottom of the upper steel arm (9) is located in the top of the lower steel arm (8) side away from the mounting seat (1). The middle part of the table plate framework (4) is equipped with limiting groove (10) corresponding to the bottom of the upper steel arm (9). The utility model relates to a kind of table board of seat

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