Simple and reliable four-connecting-rod mechanism for externally-driven small table plate

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 externally-driven 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 table technology, specifically to a simple and reliable external drive 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 externally 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 externally 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 a motor is horizontally mounted on the top of the mounting base, with drive shafts penetrating the mounting base at both ends of the motor, and hinge shafts on both sides of the bottom of the mounting base; a table frame, which is located on the side of the mounting base away from the seat, and upper shaft heads are provided on both sides of the middle of the table frame, with a bottom... The upper and lower shafts are respectively provided on both sides, and the distance between the upper and lower shafts is less than the distance between the drive shaft hinge shafts; the lower steel arm has its two ends hinged to the lower shaft and the hinge shaft respectively; the upper steel arm has its top end vertically connected to the drive shaft and its bottom end hinged to the upper shaft, and the length of the upper steel arm is greater than the length of the lower steel arm; the middle part of both sides of the mounting base is provided with supporting springs 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 the 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. Through the kinematic optimization design of the four-bar linkage, combined with the motor in the mounting seat, the table frame can be folded and fit against the back of the seat. 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 outside the table frame, the overall weight of the small table is reduced, further improving its load-bearing capacity. 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. Motor; 3. Drive shaft; 4. Hinge shaft; 5. Table frame; 6. Upper shaft head; 7. Lower shaft head; 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 externally 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; a motor 2 horizontally mounted on the top of the mounting base 1; drive shafts 3 passing through the mounting base 1 at both ends of the motor 2; and hinge shafts 4 on both sides of the bottom of the mounting base 1; a table frame 5, which is located on the side of the mounting base 1 away from the seat; and upper shaft heads 6 on both sides of the middle of the table frame 5, and lower shaft heads 7 on both sides of the bottom. The distance between the upper shaft head 6 and the lower shaft head 7 is less than the distance between the hinge shaft 4 of the drive shaft 3; the lower steel arm 8 has its two ends hinged to the lower shaft head 7 and the hinge shaft 4 respectively; the upper steel arm 9 has its top end vertically connected to the drive shaft 3 and its bottom end hinged to the upper shaft head 6, 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 provided with supporting springs 11 corresponding to the upper steel arm 9; the mounting base, the table frame, the lower steel arm, and the upper steel arm are all steel components.

[0017] In the above configuration, the table frame 5 is used to mount the small table, and a mounting groove adapted to the small table is provided on the back of the vehicle seat. The mounting base 1 is installed in the mounting groove 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 base, and the table frame 5 constitute a four-bar linkage. Through the kinematic optimization design of the four-bar linkage, combined with the motor 2 inside the mounting base 1, the table frame 5 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 base, table frame, lower steel arm, and upper steel arm to provide high load-bearing stability. Whether folding or unfolding, the motor 2 is controlled by an external control component, thus achieving one-button operation and significantly improving the user experience. Furthermore, since the motor 2 is located outside the table frame 5, the overall weight of the small table is reduced, further improving its load-bearing capacity.

[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 5 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 5 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 5 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 flips into the limiting groove 10, and the gap in the folding mechanism is eliminated by the abutment between the upper steel arm 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 externally driven small table plate four-bar linkage mechanism, characterized in that, The utility model relates to a kind of motor-driven folding table, 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 mounting seat (1) is equipped with motor (2), the drive shaft (3) of motor (2) is equipped with respectively at both ends and penetrates the mounting seat (1), the bottom of the mounting seat (1) is equipped with hinged shaft (4) respectively at both sides; Table plate framework (5), the table plate framework (5) is arranged in the side of the mounting seat (1) away from the seat, and the table plate framework (5) is equipped with upper shaft head (6) respectively at both sides of middle part, and is equipped with lower shaft head (7) respectively at both sides of bottom, the interval of the upper shaft head (6) and the lower shaft head (7) is less than the interval of the drive shaft (3) hinged shaft (4); Lower steel arm (8), both ends of the lower steel arm (8) are hingedly matched with the lower shaft head (7) and the hinged shaft (4) respectively; Upper steel arm (9), the top end of the upper steel arm (9) is connected with the drive shaft (3) perpendicularly, the bottom end is hingedly matched with the upper shaft head (6), 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 mounting seat (1) is equipped with support spring piece (11) corresponding to the upper steel arm (9) respectively at both sides; The mounting seat, the table plate framework, the lower steel arm and the upper steel arm are all steel components.

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

4. A simple and reliable externally actuated small table board four-bar linkage mechanism according to claim 3, characterized in that: The middle part of the table plate framework (5) is equipped with limit slot (10) corresponding to the bottom of the upper steel arm (9).

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