Calf rest assembly

Abstract

The application discloses a calf leg support assembly, which comprises a base body, a leg support bracket rotatably installed on the base body, a first extension plate slidably installed on the leg support bracket, a connecting rod assembly arranged between the first extension plate and the leg support bracket, and capable of dragging the first extension plate to slide relative to the leg support bracket, a transmission assembly arranged on the base body, the transmission assembly comprising a driving cross rod and a linkage plate, one end of the linkage plate being hingedly connected to the end of the driving cross rod, the other end of the linkage plate being hingedly connected to the base body, and the middle part of the driving cross rod being associated with the connecting rod assembly, and the transmission assembly being capable of forcing the connecting rod assembly to move when the leg support bracket rotates forward relative to the base body. The calf leg support assembly has the beneficial effects that the transmission assembly and the connecting rod assembly are arranged, the leg support rotation is realized, and the synchronous extension function is simultaneously achieved, the driving cross rod is replaced by the linkage plate for rotatable installation instead of the original sliding installation of the guide block, the thickness of the guide block is saved when the leg support is folded, and the compactness of the leg support is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile seat leg rest, in particular to a calf leg rest assembly. BACKGROUND

[0002] The leg rest is generally folded and installed at the bottom of the automobile seat, and is unfolded by manual or electric control, which can be used to support the passenger's calf and ensure the comfort of the passenger.

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

[0004] In view of the above problems, the applicant has proposed an ultra-thin leg rest, please refer to the Chinese patent publication text with publication number CN118322968A, by adopting a sliding installation form of the extension plate to ensure that the entire leg rest is thinner when folded, and by further arranging an eccentric guide block, the extension plate can slide along the first sliding rail synchronously when the leg rest bottom plate rotates.

[0005] Since the guide block is eccentrically arranged at the front end of the base body, when the leg rest is folded, the overall thickness thereof includes the thickness of the leg rest itself and the thickness of the guide block in addition, and the compactness of the structure still needs to be optimized. SUMMARY

[0006] Therefore, the present application provides a calf leg rest assembly, which aims to further reduce the overall thickness of the leg rest after folding.

[0007] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0008] A calf leg rest assembly, comprising a base body fixedly arranged at the front end of the bottom of an automobile seat, and a leg rest support rotatably installed on the base body, a first extension plate being slidably installed on the leg rest support, the first extension plate being used to support the passenger's calf, characterized in that: a connecting rod assembly is arranged between the first extension plate and the leg rest support, the connecting rod assembly is movable to pull the first extension plate to slide relative to the leg rest support; a transmission assembly is arranged on the base body, the transmission assembly comprising a driving cross bar and linkage plates located at both ends of the driving cross bar, one end of the linkage plate being hingedly connected to the end of the driving cross bar, the other end being hingedly connected to the base body, the middle part of the driving cross bar being associated with the connecting rod assembly, when the leg rest support rotates forward relative to the base body, the transmission assembly can force the connecting rod assembly to move.

[0009] With the above structure, when the leg support is rotated relative to the base, the first extension plate can be synchronously slid forward, thereby ensuring that the leg support is rotated while having the synchronous extension function. The driving cross rod is replaced from the original sliding installation through the guide block to the rotating installation through the linkage piece. When the leg support is folded, the driving cross rod and the linkage piece can be integrated in the base, thereby further reducing the overall size of the leg support.

[0010] As a preferred, the linkage assembly comprises a first linkage, a second linkage and a third linkage which are sequentially hinged. One end of the first linkage away from the second linkage is hinged on the leg support. The middle part of the second linkage is hinged on the driving cross rod. One end of the third linkage away from the second linkage is hinged on the first extension plate. With the above structure, when the leg support is rotated forward relative to the base, the distance between the leg support and the driving cross rod is increased. Through the effect of the linkage, the first extension plate can be unfolded forward relative to the leg support, thereby enabling the leg support to have the function of unfolding forward while being rotated.

[0011] As a preferred, a fourth linkage is further arranged between the first linkage and the third linkage. The fourth linkage is hinged at both ends with the first linkage and the third linkage, and the fourth linkage is arranged in parallel with the second linkage. With the above structure, through the parallelogram structure, the linkage assembly can be more stable when being unfolded and folded.

[0012] As a preferred, the base has two groups of mounting vertical plates. The driving cross rod is transversely arranged at the front ends of the two groups of mounting vertical plates. The driving cross rod is provided with a hanging ear which is bent to one side at both ends. One end of the linkage piece is hinged on the hanging ear, and the other end is hinged on the front end of the mounting vertical plate. When the leg support is in the folded state, the driving cross rod and the linkage piece can be folded in the space surrounded by the two groups of mounting vertical plates. With the above structure, through the design of the hanging ear and the mounting vertical plate, the installation of the linkage piece can be facilitated. The driving cross rod and the linkage piece can be folded in the space surrounded by the mounting vertical plate, and the overall thickness of the leg support can be further reduced when the leg support is folded.

[0013] As a preferred, the leg support is provided with a first sliding rail at both sides. The first extension plate is slidably installed on the first sliding rail. The first extension plate is provided with a second sliding rail at both sides. A second extension plate is slidably arranged on the second sliding rail. With the above structure, the two-stage extension of the leg support can be realized, and the overall thickness of the leg support can be further reduced.

[0014] As a preferred, the first extension plate is provided with a telescopic driving mechanism at the bottom. The telescopic driving mechanism is used to drive the second extension plate to slide along the second sliding rail. With the above structure, the two-stage extension of the leg support can be controlled by electricity.

[0015] As preferred: a rotating driving mechanism is arranged between the base body and the leg rest support, and is used to drive the leg rest support to rotate relative to the base body. With the above structure, the rotation of the leg rest can be controlled electrically.

[0016] As preferred: the rotating driving mechanism comprises a driving motor, a screw rod connected to the output end of the driving motor, and a driving block screwedly arranged on the screw rod. The driving motor is hinged to the leg rest support, and the driving block is hinged to the end of the base body away from the leg rest support. With the above structure, the rotation of the leg rest can be realized by moving the driving block on the screw rod.

[0017] As preferred: the leg rest support is hinged to the base body through a first supporting shaft, and the linkage piece is hinged to the base body through a second supporting shaft. The second supporting shaft is arranged eccentrically relative to the first supporting shaft. With the above structure, the rotation of the leg rest support can be guaranteed, and the driving cross rod can be rotated synchronously. When the driving cross rod is rotated, the linkage assembly can be forced to stretch and retract, so as to realize the synchronous extension of the first extension plate.

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

[0019] With the calf leg rest assembly provided by the present application, when the leg rest support is rotated relative to the base body, the first extension plate can be synchronously slid forward, so as to guarantee the synchronous extension function of the leg rest during rotation. The driving cross rod is replaced by the linkage piece, which is rotatably installed. When the leg rest is folded, the driving cross rod and the linkage piece can be integrated in the base body, without occupying the width and thickness dimensions of the push block, which helps to improve the compactness of the leg rest. BRIEF DESCRIPTION OF DRAWINGS

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

[0021] Figure 2 is a structural schematic view of the leg rest assembly when folded;

[0022] Figure 3 is a structural schematic view of the linkage assembly 6 in the unfolded state;

[0023] Figure 4 is a structural schematic view of the assembly structure of the second extension plate 9;

[0024] Figure 5 is a structural schematic view of the position relationship between the first supporting shaft 12 and the second supporting shaft 13;

[0025] Figure 6 is a structural schematic view of the rotating driving mechanism 11;

[0026] Figure 7 Structure diagram of the driving cross bar 5. DETAILED DESCRIPTION

[0027] The application will be further described below in conjunction with the embodiments and drawings.

[0028] As shown in Figure 1 and Figure 2 A calf leg rest assembly includes a base body 1 fixedly installed at the front end of the bottom of a car seat, and a leg rest support 2 rotatably installed on the base body 1, a first extension plate 3 is slidably installed on the leg rest support 2, the first extension plate 3 is used for supporting the calf of a passenger, a linkage assembly 6 is installed between the first extension plate 3 and the leg rest support 2, and the linkage assembly 6 is movable to pull the first extension plate 3 to slide relative to the leg rest support 2. The base body 1 is further provided with a transmission assembly, 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 hingedly connected to the end of the driving cross bar 5, the other end is hingedly connected to the base body 1, and the middle part of the driving cross bar 5 is associated with the linkage assembly 6, so that the transmission assembly can force the linkage assembly 6 to move when the leg rest support 2 rotates forward relative to the base body 1.

[0029] Through the transmission assembly and the association of the middle part of the driving cross bar 5 with the linkage assembly 6, the transmission assembly can force the linkage assembly 6 to move when the leg rest support 2 rotates forward relative to the base body 1, so that the first extension plate 3 can be extended forward synchronously. The driving cross bar 5 is rotatably installed through the linkage piece 4, compared with the sliding installation of the guide block through the eccentricity, the linkage piece 4 can be rotated and placed inside the base body 1 when the leg rest is folded, further reducing the overall thickness of the leg rest after being folded.

[0030] As shown in Figure 3 The linkage assembly 6 includes a first linkage 6a, a second linkage 6b and a third linkage 6c which are hingedly connected in sequence, in the embodiment, the leg rest support 2 extends an installation column 2a toward the side where the first extension plate 3 is located, one end of the first linkage 6a away from the second linkage 6b is hingedly connected to the installation column 2a, the middle part of the second linkage 6b is hingedly connected to the middle part of the driving cross bar 5, and one end of the third linkage 6c away from the second linkage 6b is hingedly connected to the first extension plate 3. In this way, when the leg rest support 2 rotates forward relative to the base body 1, the installation column 2a can move away from the driving cross bar 5, and the linkage assembly 6 is in a gradually unfolded state during the whole process, so that the first extension plate 3 can slide forward.

[0031] In the embodiment, a fourth linkage 6d is further installed between the first linkage 6a and the third linkage 6c, the fourth linkage 6d is hingedly connected to the first linkage 6a and the third linkage 6c at both ends respectively, and the fourth linkage 6d is arranged in parallel with the second linkage 6b. In this way, through the parallelogram structure, the linkage assembly 6 is more stable when being folded and unfolded.

[0032] As Figure 5 shown, the leg rest support 2 is hinged to the base 1 through a first support shaft 12, the linkage plate 4 is hinged to the base 1 through a 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. In this way, the leg rest support 12 can drive the driving cross rod 5 to rotate synchronously while rotating, the driving cross rod 5 changes the distance between the mounting column 2a while rotating, and then moves through the linkage assembly 6 to realize the synchronous sliding of the first extension plate 3.

[0033] Further, as Figure 5 and Figure 7 shown, the base 1 is formed with mounting upright plates 1a at both ends, the driving cross rod 5 is transversely arranged at the front ends of the two groups of mounting upright plates 1a, and the driving cross rod 5 is formed with hanging ears 5a bent towards the base 1 at both ends. One end of the linkage plate 4 is hinged to the hanging ear 5a, and the other end is hinged to the front end of the mounting upright plate 1a. When the leg rest is in the folded state, the driving cross rod 5 and the linkage plate 4 can be folded in the space surrounded by the two groups of mounting upright plates 1a, which further ensures that the overall thickness of the leg rest is lower when it is folded.

[0034] As Figure 4 shown, the first sliding rails 7 are fixedly installed on the left and right sides of the leg rest support 2, and the first extension plate 3 is slidingly installed on the first sliding rails 7. The second sliding rails 8 are fixedly installed on both sides of the first extension plate 3, and the second extension plate 9 is slidingly installed on the second sliding rails 8. In this way, two-stage extension of the leg rest is realized, thereby adapting to the needs of more height passengers for the leg rest.

[0035] As Figure 4 shown, the 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 sliding rail 8. In the embodiment, the telescopic driving mechanism 10 is a lead screw motor, and the second extension plate 9 is threadedly assembled on the lead screw. In this way, the extension and retraction of the second extension plate 9 are electrically controlled.

[0036] As Figure 6 shown, in the embodiment, the rotary driving mechanism 11 is installed between the base 1 and the leg rest support 2, and the rotary driving mechanism 11 is used to drive the leg rest support 2 to rotate relative to the base 1, thereby electrically controlling the overturning of the leg rest.

[0037] Specifically, the rotating driving mechanism 11 comprises a driving motor 11a, a screw rod 11b fixedly installed on the output end of the driving motor 11a, and a driving block 11c screwed on the screw rod 11b. The driving motor 11a is hinged on the leg support bracket 2, and the driving block 11c is hinged on the end of the base body 1 far away from the leg support bracket 2. When the driving motor 11a operates, the driving motor 11a can be made to approach or move away from the driving block 11c under the transmission of the screw rod 11b and the driving 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 for the preferred embodiments of the present application, and those skilled in the art can make various similar modifications under the inspiration of the present application without departing from the purpose and the claims of the present application, and such modifications fall within the protection scope of the present application.

Claims

1. A calf leg rest assembly, comprising a base (1) fixedly arranged at the front end of the bottom of a car seat, and a leg rest support (2) rotatably arranged on the base (1), a first extension plate (3) is slidably arranged on the leg rest support (2), and the first extension plate (3) is used for supporting the calf of a passenger, characterized in that: The first extension plate (3) and the leg support bracket (2) are provided with a connecting rod assembly (6), the connecting rod assembly (6) moves and can pull the first extension plate (3) to slide relative to the leg support bracket (2); The base body (1) is provided with a transmission assembly, the transmission assembly comprises a driving cross rod (5) and linkage plates (4) located at both ends of the driving cross rod (5), one end of the linkage plate (4) is hinged to the end of the driving cross rod (5), the other end is hinged to the base body (1), the middle part of the driving cross rod (5) is associated with the connecting rod assembly (6), when the leg support bracket (2) rotates relative to the base body (1) forward, the transmission assembly can force the connecting rod assembly (6) to move; The base body (1) has two groups of mounting vertical plates (1a), the driving cross rod (5) is transversely arranged at the front ends of the two groups of mounting vertical plates (1a), the two ends of the driving cross rod (5) are provided with hanging ears (5a) bent to one side, one end of the linkage plate (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 support is in the folded state, the driving cross rod (5) and the linkage plate (4) can be folded in the space surrounded by the two groups of mounting vertical plates (1a).

2. The lower leg support assembly of claim 1, wherein: The connecting rod assembly (6) comprises first, second and third connecting rods (6a, 6b and 6c) hinged in sequence, 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 lower leg support assembly of claim 2, wherein: The first connecting rod (6a) and the third connecting rod (6c) are further provided with a fourth connecting rod (6d), the two 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 lower leg support assembly of claim 1, wherein: The leg support bracket (2) is provided with first sliding rails (7) on both sides, the first extension plate (3) is slidingly arranged on the first sliding rails (7), the first extension plate (3) is provided with second sliding rails (8) on both sides, and the second extension plate (9) is slidingly arranged on the second sliding rails (8).

5. The lower leg support assembly of claim 4, wherein: The bottom of the first extension plate (3) is provided with a telescopic driving mechanism (10), and the telescopic driving mechanism (10) is used to drive the second extension plate (9) to slide along the second sliding rail (8).

6. The lower leg support assembly of claim 1, wherein: The base body (1) and the leg support bracket (2) are provided with a rotary driving mechanism (11), and the rotary driving mechanism (11) is used to drive the leg support bracket (2) to rotate relative to the base body (1).

7. The lower leg support assembly of claim 6, wherein: The rotary driving mechanism (11) comprises a driving motor (11a), a screw rod (11b) connected to the output end of the driving motor (11a), and a driving block (11c) threadedly sleeved on the screw rod (11b), the driving motor (11a) is hinged to the leg support bracket (2), and the driving block (11c) is hinged to the end of the base body (1) away from the leg support bracket (2).

8. The lower leg support assembly of claim 1, wherein: The leg rest support (2) is hinged to the base body (1) by a first support shaft (12), and the linkage plate (4) is hinged to the base body (1) by a second support shaft (13), the second support shaft (13) being arranged eccentrically relative to the first support shaft (12).

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