Linkage leg supporting mechanism for achieving four-direction leg supporting function through one motor

Abstract

The utility model discloses a linkage leg supporting mechanism which realizes a four-direction leg supporting function by using a motor, an overturning assembly is arranged between a fixed bracket and a supporting plate assembly, and a driving assembly can be used for driving the overturning mechanism to act so as to enable the supporting plate assembly to perform overturning movement relative to the fixed bracket; the linkage telescopic assembly is arranged between the overturning assembly and the supporting plate assembly, the rotating motion of the overturning mechanism relative to the first supporting plate can be converted into the linear motion of the sliding plate relative to the first supporting plate through the adapter rod, and then a second connecting rod and a third connecting rod are driven to rotate; the first connecting rod is driven to move and the second supporting plate is driven to do linear telescopic motion relative to the first supporting plate; specifically, the middle of the second connecting rod is hinged to a third connecting rod, and the third connecting rod is hinged to the first supporting plate, so that the connecting position of the second connecting rod and the third connecting rod can move relative to the first supporting plate, and jamming is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of seat technology, specifically a linkage leg support mechanism that uses a single motor to achieve four-way leg support function. Background Technology

[0002] With the continuous development of technology, people have increasingly higher requirements for the comfort of seats, among which seats with leg rests are becoming more and more popular with consumers. Leg rests need to have a flipping function to provide leg support; in addition, besides the flipping function, some leg rests also have a telescopic function to increase the support area for the legs. For leg rests that have both flipping and telescopic functions, existing technology generally includes two motors: one motor drives the leg rest to perform the telescopic movement, and the other motor drives the leg rest to perform the flipping movement. While this meets the usage requirements, the use of multiple motors undoubtedly increases the cost of the leg rest. Summary of the Invention

[0003] In view of this, the purpose of this utility model is to provide a linkage leg support mechanism that uses a single motor to achieve four-way leg support function, which can use a single motor to drive the leg support to achieve four-way movement of extension, retraction and flipping, and can effectively reduce costs.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A linkage leg support mechanism that uses a single motor to achieve four-way leg support function includes a fixed bracket and a support plate assembly, with a flipping assembly between the fixed bracket and the support plate assembly; and a linkage telescopic assembly between the flipping assembly and the support plate assembly.

[0006] The support plate assembly includes a first support plate and a second support plate that is slidably mounted on the first support plate;

[0007] The flipping assembly includes a flipping mechanism and a drive assembly for driving the flipping mechanism to perform a flipping motion of the support plate assembly;

[0008] The linkage telescopic assembly includes a sliding plate slidably mounted on the first support plate and a first connecting rod hinged to the second support plate; a second connecting rod is provided between the sliding plate and the first connecting rod, with both ends of the second connecting rod hinged to the sliding plate and the first connecting rod respectively; a transition rod is provided between the sliding plate and the flipping mechanism, with both ends of the transition rod hinged to the sliding plate and the flipping mechanism respectively; a third connecting rod is provided between the second connecting rod and the first support plate, with both ends of the third connecting rod hinged to the second connecting rod and the first support plate respectively, and the connection position between the third connecting rod and the second connecting rod is located between the connection position between the first connecting rod and the second connecting rod and the connection position between the sliding plate and the second connecting rod.

[0009] Furthermore, linear bearings are provided on both sides of the first support plate, and linear guide rods that cooperate with the linear bearings are provided on both sides of the second support plate.

[0010] Furthermore, the first connecting rod and the second support plate are hinged together by a first hinge shaft. The first support plate is provided with a guide structure for guiding the movement of the first hinge shaft, and the guide structure is parallel to the linear guide rod.

[0011] Furthermore, the first support plate is provided with a linear slide rail, a linear slider is installed on the linear slide rail, and the sliding plate is installed on the linear slider.

[0012] Furthermore, the connection position between the second link and the sliding plate is designated as the first connection position, the connection position between the second link and the third link is designated as the second connection position, and the connection position between the second link and the first link is designated as the third connection position; the distance between the first connection position and the second connection position is less than the distance between the second connection position and the third connection position.

[0013] Furthermore, the flipping mechanism includes a first connecting rod and a third connecting rod hinged to the fixed bracket, and a second connecting rod and a fourth connecting rod hinged to the first support plate. The first connecting rod is hinged to the second connecting rod, and the third connecting rod is hinged to the fourth connecting rod. The second connecting rod is hinged to the third connecting rod, and the connection position between the second connecting rod and the third connecting rod is located between the connection position between the second connecting rod and the first connecting rod and the connection position between the second connecting rod and the first support plate. The connection position between the third connecting rod and the second connecting rod is located between the connection position between the third connecting rod and the fixed bracket and the connection position between the third connecting rod and the fourth connecting rod.

[0014] Furthermore, the adapter rod is hinged to the second connecting rod or the fourth connecting rod.

[0015] Furthermore, the drive assembly is mounted on the fixed bracket, and the drive assembly is used to drive the first connecting rod or the third connecting rod to rotate relative to the fixed bracket.

[0016] Furthermore, the flipping mechanism is provided in two parts and is located between the fixed bracket and the first support plate on both sides respectively; a crossbar is provided between the two third connecting rods, and a transmission component is provided on the crossbar. The driving assembly includes an output shaft perpendicular to the crossbar, and the output shaft is hinged to the transmission rod.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention utilizes a single motor to achieve a four-way leg support mechanism. A flipping component is installed between the fixed bracket and the support plate assembly. A drive component can then drive the flipping mechanism to flip the support plate assembly relative to the fixed bracket. A telescopic linkage component is installed between the flipping component and the support plate assembly. A connecting rod converts the rotational motion of the flipping mechanism relative to the first support plate into linear motion of the sliding plate relative to the first support plate. This drives the second and third connecting rods to rotate, causing the first connecting rod to move and the second support plate to extend and retract linearly relative to the first support plate. Specifically, the middle of the second connecting rod is hinged to the third connecting rod, which in turn is hinged to the first support plate. This allows the connection point between the second and third connecting rods to move relative to the first support plate, preventing jamming. In summary, this invention's telescopic leg support can achieve four-way movement (extension and retraction) and flipping (expansion and retraction) using a single motor, effectively reducing costs. Attached Figure Description

[0019] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0020] Figure 1 This is a schematic diagram of the structure of the linkage leg support of this utility model, specifically a schematic diagram of the linkage leg support in the retracted state;

[0021] Figure 2 for Figure 1 Axonometric drawing;

[0022] Figure 3 This is a schematic diagram of the linked leg support in the unfolded state in this embodiment;

[0023] Figure 4 for Figure 3 Top view;

[0024] Figure 5 for Figure 3 Upper axonometric drawing;

[0025] Figure 6 for Figure 3 The lower axonometric drawing.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10-Fixed bracket; 11-Fixed rod;

[0028] 20-Support plate assembly; 21-First support plate; 22-Second support plate; 23-Linear bearing; 24-Linear guide rod; 25-Guide structure; 26-Linear slide rail; 27-Linear slider;

[0029] 30-Flipping assembly; 31-First connecting rod; 32-Second connecting rod; 33-Third connecting rod; 34-Fourth connecting rod; 35-Crossbar; 36-Transmission component; 37-Output shaft; 38-Drive motor; 39-Gearbox;

[0030] 40 - Linkage telescopic assembly; 41 - First link; 42 - Second link; 421 - First connection position; 422 - Second connection position; 423 - Third connection position; 43 - Third link; 44 - Sliding plate; 45 - Adapter rod; 46 - First hinge shaft. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0032] like Figure 1-3 As shown, this embodiment uses a motor to realize a linkage leg support mechanism with four-way leg support function. It includes a fixed bracket 10 and a support plate assembly 20. A flipping component 30 is provided between the fixed bracket 10 and the support plate assembly 20. A linkage telescopic component 40 is provided between the flipping component 30 and the support plate assembly 20.

[0033] like Figure 5-6 As shown, in this embodiment, the support plate assembly 20 includes a first support plate 21 and a second support plate 22 slidably mounted on the first support plate 21. In this embodiment, linear bearings 23 are respectively provided on both sides of the first support plate 21, and linear guide rods 24 cooperating with the linear bearings 23 are respectively provided on both sides of the second support plate 22. Thus, under the guiding action of the linear bearings 23 and the linear guide rods 24, the second support plate 22 can perform linear telescopic movement relative to the first support plate 21.

[0034] In this embodiment, the flipping assembly 30 includes a flipping mechanism and a driving assembly for driving the flipping mechanism to drive the support plate assembly 20 to perform a flipping motion. In this embodiment, the flipping mechanism includes a first connecting rod 31 and a third connecting rod 33 hinged to the fixed bracket 10, and a second connecting rod 32 and a fourth connecting rod 34 hinged to the first support plate 21. The first connecting rod 31 is hinged to the second connecting rod 32, and the third connecting rod 33 is hinged to the fourth connecting rod 34. The second connecting rod 32 is hinged to the third connecting rod 33, and the connection position between the second connecting rod 32 and the third connecting rod 33 is located between the connection position between the second connecting rod 32 and the first connecting rod 31, and between the second connecting rod 32 and the first support plate 21. The connection position between the third connecting rod 33 and the second connecting rod 32 is located between the connection position between the third connecting rod 33 and the fixed bracket 10, and between the third connecting rod 33 and the fourth connecting rod 34.

[0035] In this embodiment, the drive assembly is mounted on the fixed bracket 10 and is used to drive the first connecting rod 31 or the third connecting rod 33 to rotate relative to the fixed bracket 10. In this embodiment, the output shaft of the drive assembly is connected to the third connecting rod 33 and drives the third connecting rod 33 to rotate relative to the fixed bracket 10. Specifically, there are two flipping mechanisms, located between the fixed bracket 10 and the two sides of the first support plate 21, respectively. In this embodiment, a crossbar 35 is provided between the two third connecting rods 33, and a transmission member 36 is provided on the crossbar 35. The drive assembly includes an output shaft 37 perpendicular to the crossbar 35, and the output shaft 37 is hinged to the transmission rod 36. The output shaft 37 moves along its axial direction, driving the crossbar 35 and the third connecting rod 33 to rotate relative to the fixed bracket 10 through the transmission member 36. In this embodiment, the drive assembly includes a drive motor 38 and a gearbox 39 connected to the drive motor 38. A fixed rod 11 is provided on the fixed bracket 10, the gearbox 39 is fixedly mounted on the fixed rod 11, and the drive motor 38 is fixedly mounted on the gearbox 39.

[0036] like Figure 4 and Figure 6As shown, in this embodiment, the linkage telescopic assembly 40 includes a sliding plate 44 slidably mounted on the first support plate 21 and a first connecting rod 41 hinged to the second support plate 22. A second connecting rod 42 is provided between the sliding plate 44 and the first connecting rod 41, with both ends of the second connecting rod 42 hinged to the sliding plate 44 and the first connecting rod 41, respectively. A transition rod 45 is provided between the sliding plate 44 and the flipping mechanism, with both ends of the transition rod 45 hinged to the sliding plate 44 and the flipping mechanism, respectively. Specifically, the transition rod 45 is hinged to either the second connecting rod 32 or the fourth connecting rod 34. In this embodiment, the transition rod 45 is hinged to the second connecting rod 32. A third link 43 is provided between the second link 42 and the first support plate 21. The two ends of the third link 43 are respectively hinged to the second link 42 and the first support plate 21, and the connection position between the third link 43 and the second link 42 is located between the connection position between the first link 41 and the second link 42 and the connection position between the sliding plate 33 and the second link 42.

[0037] In this embodiment, the first connecting rod 41 and the second support plate 22 are hinged together by a first hinge shaft 46. The first support plate 21 is provided with a guide structure 25 for guiding the movement of the first hinge shaft 46. The guide structure 25 is parallel to the linear guide rod 24. Specifically, the guide structure 25 can be a long strip-shaped guide slot or a linear guide rail, etc., which will not be described in detail here.

[0038] In this embodiment, a linear slide rail 26 is provided on the first support plate 21, and a linear slider 27 is mounted on the linear slide rail 26. A sliding plate 44 is mounted on the linear slider 27 to guide the sliding direction of the sliding plate 44 relative to the first support plate 21. In this embodiment, the linear slide rail 26 is parallel to the linear guide rod 24.

[0039] like Figure 4 As shown, in a preferred embodiment of this example, the connection position between the second link 42 and the sliding plate 44 is designated as the first connection position 421, the connection position between the second link 42 and the third link 43 is designated as the second connection position 422, and the connection position between the second link 42 and the first link 41 is designated as the third connection position 423. Figure 4 As shown, the distance between the first connecting position 421 and the second connecting position 422 is less than the distance between the second connecting position 422 and the third connecting position 423. In this way, the linear movement distance of the sliding plate 44 relative to the first support plate 21 can be increased, so that the third link 43 and the first hinge shaft 46 can move a greater distance along the guide structure 25.

[0040] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A linkage leg support mechanism that uses a single motor to achieve four-way leg support function, characterized in that: The system includes a fixed bracket and a support plate assembly, with a flipping assembly between the fixed bracket and the support plate assembly; a linkage telescopic assembly is provided between the flipping assembly and the support plate assembly. The support plate assembly includes a first support plate and a second support plate that is slidably mounted on the first support plate; The flipping assembly includes a flipping mechanism and a drive assembly for driving the flipping mechanism to perform a flipping motion of the support plate assembly; The linkage telescopic assembly includes a sliding plate slidably mounted on the first support plate and a first connecting rod hinged to the second support plate; a second connecting rod is provided between the sliding plate and the first connecting rod, with both ends of the second connecting rod hinged to the sliding plate and the first connecting rod respectively; a transition rod is provided between the sliding plate and the flipping mechanism, with both ends of the transition rod hinged to the sliding plate and the flipping mechanism respectively; a third connecting rod is provided between the second connecting rod and the first support plate, with both ends of the third connecting rod hinged to the second connecting rod and the first support plate respectively, and the connection position between the third connecting rod and the second connecting rod is located between the connection position between the first connecting rod and the second connecting rod and the connection position between the sliding plate and the second connecting rod.

2. The linkage leg support mechanism that uses a single motor to achieve four-way leg support function according to claim 1, characterized in that: The first support plate is provided with linear bearings on both sides, and the second support plate is provided with linear guide rods that cooperate with the linear bearings on both sides.

3. The linkage leg support mechanism that uses a single motor to achieve four-way leg support function according to claim 2, characterized in that: The first connecting rod and the second support plate are hinged together by a first hinge shaft. The first support plate is provided with a guide structure for guiding the movement of the first hinge shaft, and the guide structure is parallel to the linear guide rod.

4. The linkage leg support mechanism that uses a single motor to achieve four-way leg support function according to claim 1, characterized in that: The first support plate is provided with a linear slide rail, a linear slider is installed on the linear slide rail, and the sliding plate is installed on the linear slider.

5. The linkage leg support mechanism that uses a single motor to achieve four-way leg support function according to claim 1, characterized in that: Let the connection position between the second link and the sliding plate be the first connection position, the connection position between the second link and the third link be the second connection position, and the connection position between the second link and the first link be the third connection position; the distance between the first connection position and the second connection position is less than the distance between the second connection position and the third connection position.

6. The linkage leg support mechanism that uses a single motor to achieve four-way leg support function according to any one of claims 1-5, characterized in that: The flipping mechanism includes a first connecting rod and a third connecting rod hinged to the fixed bracket, and a second connecting rod and a fourth connecting rod hinged to the first support plate. The first connecting rod is hinged to the second connecting rod, and the third connecting rod is hinged to the fourth connecting rod. The second connecting rod is hinged to the third connecting rod, and the connection position between the second connecting rod and the third connecting rod is located between the connection position between the second connecting rod and the first connecting rod and the connection position between the second connecting rod and the first support plate. The connection position between the third connecting rod and the second connecting rod is located between the connection position between the third connecting rod and the fixed bracket and the connection position between the third connecting rod and the fourth connecting rod.

7. The linkage leg support mechanism that uses a single motor to achieve four-way leg support function according to claim 6, characterized in that: The adapter rod is hinged to the second connecting rod or the fourth connecting rod.

8. The linkage leg support mechanism that uses a single motor to achieve four-way leg support function according to claim 6, characterized in that: The drive assembly is mounted on the fixed bracket, and the drive assembly is used to drive the first connecting rod or the third connecting rod to rotate relative to the fixed bracket.

9. The linkage leg support mechanism that uses a single motor to achieve four-way leg support function according to claim 8, characterized in that: Two flipping mechanisms are provided and located between the fixed bracket and the first support plate on both sides respectively; a crossbar is provided between the two third connecting rods, and a transmission component is provided on the crossbar. The drive assembly includes an output shaft perpendicular to the crossbar, and the output shaft is hinged to the transmission component.

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