Shank support assembly

Abstract

The shank support assembly comprises a base body and a leg support support rotationally installed on the base body, a first extension plate is installed on the leg support support in a sliding mode, a connecting rod assembly is arranged between the first extension plate and the leg support support, and the connecting rod assembly can move to pull the first extension plate to slide relative to the leg support support; a transmission assembly is arranged on the base body and comprises a driving cross rod and a linkage piece, one end of the linkage piece is hinged to the end of the driving cross rod, the other end of the linkage piece is hinged to the base body, the middle of the driving cross rod is associated with the connecting rod assembly, and when the leg support bracket rotates forwards relative to the base body, the transmission assembly can force the connecting rod assembly to move. The leg support has the advantages that through the transmission assembly and the connecting rod assembly, the leg support rotates, meanwhile, the synchronous extending function is achieved, original sliding installation of the driving transverse rod through a guide block is replaced by rotating installation of the linkage piece, when the leg support is folded, the thickness of the guide block is omitted, and the compactness of the leg support is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seat leg supports, and in particular to a calf leg support assembly. Background Art

[0002] The leg rest is usually folded and installed at the bottom of the car seat. It can be unfolded by manual or electric control and can be used to support the passenger's calves to ensure the passenger's riding comfort.

[0003] In the prior art, a connecting rod structure is generally used to increase the extension length of the leg rest, thereby ensuring that passengers of all heights have a good riding experience. However, when the connecting rod structure is folded, the overall thickness of the leg rest is much thicker than that of the leg rest without the extension mechanism.

[0004] In response to the above problems, the applicant has proposed an ultra-thin leg rest. For details, please refer to the Chinese invention patent publication number CN118322968A. The extension plate is installed in a sliding manner to ensure that the entire leg rest is lighter and thinner when folded. In addition, through the eccentrically arranged guide block, the extension plate can slide synchronously along the first slide rail when the leg rest base plate rotates.

[0005] Since the guide block is eccentrically arranged at the front end of the base, when the leg support is folded, its overall thickness includes not only the thickness of the leg support itself but also the thickness of the guide block itself, so the compactness of the structure still needs to be optimized. Summary of the invention

[0006] In view of this, the present invention provides a calf leg support assembly, aiming to further reduce the overall thickness of the leg support after being folded.

[0007] To achieve the above purpose, the technical solution of the present invention is as follows:

[0008] A calf leg support assembly comprises a base fixedly arranged at the front end of the bottom of a car seat, and a leg support bracket rotatably mounted on the base, a first extension plate being slidably mounted on the leg support bracket, the first extension plate being used to support the calf of the occupant, and characterized in that: a connecting rod assembly is provided between the first extension plate and the leg support bracket, and the movement of the connecting rod assembly can pull the first extension plate to slide relative to the leg support bracket; a transmission assembly is provided on the base, the transmission assembly comprises a driving cross bar and linkage plates located at both ends of the driving cross bar, one end of the linkage plate is hinged to the end of the driving cross bar, and the other end is hinged to the base, the middle part of the driving cross bar is associated with the connecting rod assembly, and when the leg support bracket rotates forward relative to the base, the transmission assembly can force the connecting rod assembly to move.

[0009] With the above structure, through the drive cross bar and connecting rod assembly, when the leg support bracket rotates relative to the base, the first extension plate can slide forward synchronously, thereby ensuring that the leg support rotates and has the function of synchronous extension. The drive cross bar is replaced by the linkage plate rotation installation instead of the original sliding installation through the guide block. When the leg support is folded, the drive cross bar and the linkage plate can be integrated into the base, further reducing the overall size of the leg support.

[0010] Preferably, the connecting rod assembly comprises a first connecting rod, a second connecting rod and a third connecting rod which are hinged in sequence, the end of the first connecting rod away from the second connecting rod is hinged on the leg support bracket, the middle part of the second connecting rod is hinged on the driving cross rod, and the end of the third connecting rod away from the second connecting rod is hinged on the first extension plate. With the above structure, when the leg support bracket rotates forward relative to the base, the distance between the leg support bracket and the driving cross rod increases, and the first extension plate can be unfolded forward relative to the leg support bracket through the action of the connecting rod, so that the leg support can be unfolded forward while rotating.

[0011] Preferably, a fourth link is provided between the first link and the third link, the two ends of the fourth link are respectively hinged to the first link and the third link, and the fourth link is arranged parallel to the second link. With the above structure, the parallelogram structure makes the link assembly more stable when unfolded and folded.

[0012] Preferably, the base has two groups of mounting vertical plates, the driving cross bar is horizontally placed at the front ends of the two groups of mounting vertical plates, the two ends of the driving cross bar are provided with hanging ears bent to one side, one end of the linkage piece is hinged on the hanging ear, and the other end is hinged to the front end of the mounting vertical plate; when the leg support is in the folded state, the driving cross bar and the linkage piece can be folded in the space surrounded by the two groups of mounting vertical plates. With the above structure, the installation of the linkage piece can be facilitated through the design of the hanging ears and the mounting vertical plates, the driving cross bar and the linkage piece can be folded in the space surrounded by the mounting vertical plates, and the overall thickness can be smaller when the leg support is folded.

[0013] Preferably, the leg rest bracket is provided with first slide rails on both sides, the first extension plate is slidably mounted on the first slide rails, the first extension plate is provided with second slide rails on both sides, and the second extension plate is slidably mounted on the second slide rails. The above structure can realize the secondary extension of the leg rest, and also makes the overall thickness of the leg rest smaller.

[0014] Preferably, a telescopic driving mechanism is provided at the bottom of the first extension plate, and the telescopic driving mechanism is used to drive the second extension plate to slide along the second slide rail. With the above structure, the secondary extension of the leg rest can be electrically controlled.

[0015] Preferably, a rotation drive mechanism is provided between the base and the leg support bracket, and the rotation drive mechanism is used to drive the leg support bracket to rotate relative to the base. With the above structure, the rotation of the leg support can be electrically controlled.

[0016] Preferably, the rotation drive mechanism comprises a drive motor, a screw connected to the output end of the drive motor, and a drive block threadedly mounted on the screw, the drive motor is hinged to the leg support bracket, and the drive block is hinged to an end of the base away from the leg support bracket. With the above structure, the leg support can be rotated by moving the drive block on the screw.

[0017] Preferably, the leg support bracket is hinged to the base body via a first support shaft, and the linkage plate is hinged to the base body via a second support shaft, and the second support shaft is eccentrically arranged relative to the first support shaft. With the above structure, it is possible to ensure that the driving cross bar can rotate synchronously while the leg support bracket rotates, and the driving cross bar can force the connecting rod assembly to extend and retract while rotating, thereby achieving synchronous extension of the first extension plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The calf leg support assembly provided by the present invention is provided with a driving cross bar and a connecting rod assembly, and when the leg support bracket rotates relative to the base, the first extension plate can slide forward synchronously, thereby ensuring that the leg support rotates and has a synchronous extension function. The driving cross bar is replaced by a linkage plate rotation installation instead of the original sliding installation through the guide block. When the leg support is folded, the driving cross bar and the linkage plate can be integrated into the base, and will not occupy the extra width and thickness of the push block, which helps to improve the compactness of the leg support. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the leg rest assembly when it is unfolded;

[0021] Figure 2 It is a structural schematic diagram of the leg support assembly when it is folded;

[0022] Figure 3 It is a structural schematic diagram of the connecting rod assembly 6 in an unfolded state;

[0023] Figure 4 This is a schematic diagram showing the assembly structure of the second extension plate 9;

[0024] Figure 5 A structural schematic diagram showing the positional relationship between the first support shaft 12 and the second support shaft 13;

[0025] Figure 6 is a structural schematic diagram of the rotary drive mechanism 11;

[0026] Figure 7 It is a schematic diagram of the structure of the driving cross bar 5. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with embodiments and drawings.

[0028] like Figure 1 and Figure 2 As shown, a calf leg support assembly includes a base 1 fixedly mounted on the front end of the bottom of the car seat, and a leg support bracket 2 rotatably mounted on the base 1, a first extension plate 3 is slidably mounted on the leg support bracket 2, the first extension plate 3 is used to support the calf of the occupant, and a connecting rod assembly 6 is installed between the first extension plate 3 and the leg support bracket 2, and the movement of the connecting rod assembly 6 can pull the first extension plate 3 to slide relative to the leg support bracket 2. A transmission assembly is also provided on the base 1, and the transmission assembly includes a driving cross bar 5 and a linkage piece 4 located at both ends of the driving cross bar 5, one end of the linkage piece 4 is hinged to the end of the driving cross bar 5, and the other end is hinged to the base 1, and the middle part of the driving cross bar 5 is associated with the linkage assembly 6. When the leg support bracket 2 rotates forward relative to the base 1, the transmission assembly can force the linkage assembly 6 to move.

[0029] By setting a transmission assembly, and the middle part of the driving cross bar 5 is associated with the connecting rod assembly 6, when the leg support bracket 2 rotates forward relative to the base 1, the transmission assembly can force the connecting rod assembly 6 to move, thereby allowing the first extension plate 3 to extend forward synchronously. The driving cross bar 5 is rotatably installed through the linkage piece 4. Compared with the sliding installation through the eccentrically arranged guide block, when the leg support is folded, the connecting piece 4 can be rotated and placed inside the base 1, further reducing the overall thickness of the leg support after folding.

[0030] like Figure 3 As shown, the connecting rod assembly 6 includes a first connecting rod 6a, a second connecting rod 6b and a third connecting rod 6c which are hinged in sequence. In this embodiment, the leg support bracket 2 is provided with a mounting column 2a extending toward the side where the first extension plate 3 is located. The end of the first connecting rod 6a away from the second connecting rod 6b is hinged on the mounting column 2a, the middle of the second connecting rod 6b is hinged at the middle position of the driving cross bar 5, and the end of the third connecting rod 6c away from the second connecting rod 6b is hinged on the first extension plate 3. With such a design, when the leg support bracket 2 rotates forward relative to the base 1, the mounting column 2a can be away from the driving cross bar 5. During the whole process, the connecting rod assembly 6 is in a gradually unfolded state, thereby enabling the first extension plate 3 to slide forward.

[0031] In this embodiment, a fourth link 6d is installed between the first link 6a and the third link 6c. The two ends of the fourth link 6d are hinged to the first link 6a and the third link 6c respectively, and the fourth link 6d is arranged parallel to the second link 6b. With this design, the parallelogram structure makes the link assembly 6 more stable when folded and unfolded.

[0032] like Figure 5 As shown, the leg support bracket 2 is hinged on the base 1 through the first support shaft 12, the linkage plate 4 is hinged on the base 1 through the first support shaft 13, the second support shaft 13 is eccentrically arranged relative to the first support shaft 12, and the second support shaft 13 is close to the front end of the car seat. With such a design, the leg support bracket 12 can synchronously drive the driving cross bar 5 to rotate while rotating. When the driving cross bar 5 rotates, the distance between it and the mounting column 2a changes, and then the first extension plate 3 moves through the movement of the connecting rod assembly 6 to achieve synchronous sliding.

[0033] Further, such as Figure 5 and Figure 7 As shown, mounting uprights 1a are formed at both ends of the base 1, a driving cross bar 5 is horizontally placed at the front ends of the two groups of mounting uprights 1a, and ears 5a bent toward the base 1 are formed at both ends of the driving cross bar 5, one end of the linkage piece 4 is hinged on the ear 5a, and the other end is hinged to the front end of the mounting uprights 1a. When the leg rest is in a folded state, the driving cross bar 5 and the linkage piece 4 can be folded in the space surrounded by the two groups of mounting uprights 1a, thereby further ensuring that the overall thickness of the leg rest is lower when it is folded.

[0034] like Figure 4 As shown, the first slide rails 7 are fixedly installed on the left and right sides of the leg rest bracket 2, and the first extension plate 3 is slidably installed on the first slide rails 7. The second slide rails 8 are fixedly installed on both sides of the first extension plate 3, and the second extension plate 9 is slidably installed on the second slide rails 8. Such a design realizes the secondary extension of the leg rest, thereby meeting the needs of occupants of more height groups for the leg rest.

[0035] like Figure 4 As shown, a telescopic driving mechanism 10 is fixedly installed at the bottom of the first extension plate 3, and the telescopic driving mechanism 10 is used to drive the second extension plate 9 to slide along the second slide rail 8. In this embodiment, the telescopic driving mechanism 10 is a screw motor, and the middle part of the second extension plate 9 is threadedly assembled on the screw, so as to realize the electric control of the telescopic movement of the second extension plate 9.

[0036] like Figure 6 As shown, in this embodiment, a rotation drive mechanism 11 is installed between the base 1 and the leg rest bracket 2, and the rotation drive mechanism 11 is used to drive the leg rest bracket 2 to rotate relative to the base 1, thereby electrically controlling the flipping of the leg rest.

[0037] Specifically, the rotary drive mechanism 11 includes a drive motor 11a, a screw rod 11b fixedly mounted on the output end of the drive motor 11a, and a drive block 11c threadedly mounted on the screw rod 11b. The drive motor 11a is hinged on the leg support bracket 2, and the drive block 11c is hinged on the end of the base body 1 away from the leg support bracket 2. When the drive motor 11a is running, the drive motor 11a can be moved closer to or away from the drive block 11c under the transmission action of the screw rod 11b and the drive block 11c, so as to realize the rotation of the leg support bracket 2.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A calf support assembly, comprising a base (1) fixedly arranged at the front end of the bottom of a car seat, and a leg support bracket (2) rotatably mounted on the base (1), a first extension plate (3) being slidably mounted on the leg support bracket (2), the first extension plate (3) being used to support the calf of the occupant, characterized in that: A connecting rod assembly (6) is provided between the first extension plate (3) and the leg support bracket (2), and the connecting rod assembly (6) moves to pull the first extension plate (3) to slide relative to the leg support bracket (2); The base (1) is provided with a transmission assembly, which includes a driving cross bar (5) and linkage plates (4) located at both ends of the driving cross bar (5), one end of the linkage plate (4) is hinged to the end of the driving cross bar (5), and the other end is hinged to the base (1), the middle part of the driving cross bar (5) is associated with the connecting rod assembly (6), and when the leg support bracket (2) rotates forward relative to the base (1), the transmission assembly can force the connecting rod assembly (6) to move.

2. The calf support assembly according to claim 1, characterized in that: The connecting rod assembly (6) comprises a first connecting rod (6a), a second connecting rod (6b) and a third connecting rod (6c) which are hinged in sequence, wherein one end of the first connecting rod (6a) away from the second connecting rod (6b) is hinged to the leg support bracket (2), the middle part of the second connecting rod (6b) is hinged to the driving cross rod (5), and one end of the third connecting rod (6c) away from the second connecting rod (6b) is hinged to the first extension plate (3).

3. The calf support assembly according to claim 2, characterized in that: A fourth connecting rod (6d) is also provided between the first connecting rod (6a) and the third connecting rod (6c), and both ends of the fourth connecting rod (6d) are respectively hinged to the first connecting rod (6a) and the third connecting rod (6c), and the fourth connecting rod (6d) is arranged in parallel with the second connecting rod (6b).

4. The calf support assembly according to claim 1, characterized in that: The base (1) has two groups of mounting vertical plates (1a), the driving cross bar (5) is horizontally placed at the front ends of the two groups of mounting vertical plates (1a), the two ends of the driving cross bar (5) are provided with hanging ears (5a) bent to one side, one end of the linkage piece (4) is hinged to the hanging ear (5a), and the other end is hinged to the front end of the mounting vertical plate (1a); When the leg rest is in a folded state, the driving cross bar (5) and the linkage plate (4) can be folded into a space surrounded by the two sets of mounting vertical plates (1a).

5. The calf support assembly according to claim 1, characterized in that: The leg support bracket (2) is provided with first slide rails (7) on both sides, the first extension plate (3) is slidably mounted on the first slide rails (7), the first extension plate (3) is provided with second slide rails (8) on both sides, and the second extension plate (9) is slidably mounted on the second slide rails (8).

6. The calf support assembly according to claim 5, characterized in that: A telescopic driving mechanism (10) is provided at the bottom of the first extension plate (3), and the telescopic driving mechanism (10) is used to drive the second extension plate (9) to slide along the second slide rail (8).

7. The calf support assembly according to claim 1, characterized in that: A rotation drive mechanism (11) is provided between the base (1) and the leg support bracket (2), and the rotation drive mechanism (11) is used to drive the leg support bracket (2) to rotate relative to the base (1).

8. The calf support assembly according to claim 7, characterized in that: The rotary drive mechanism (11) comprises a drive motor (11a), a screw rod (11b) connected to the output end of the drive motor (11a), and a drive block (11c) threadedly mounted on the screw rod (11b); the drive motor (11a) is hinged to the leg support bracket (2); and the drive block (11c) is hinged to one end of the base (1) away from the leg support bracket (2).

9. The calf support assembly according to claim 1, characterized in that: The leg support bracket (2) is hinged to the base (1) via a first support shaft (12), and the linkage plate (4) is hinged to the base (1) via a second support shaft (13), wherein the second support shaft (13) is eccentrically arranged relative to the first support shaft (12).

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