Four-direction leg support adjusting mechanism

Abstract

The utility model belongs to the field of automobile leg supports, and particularly relates to a four-direction leg support adjusting mechanism which comprises a connecting rod mechanism, the connecting rod mechanism is connected with a bearing platform, a pedal is arranged on the upper side face of the bearing platform, and the lower side face of the pedal is in sliding connection with the upper side face of the bearing platform through a sliding rail. The sliding rail is arranged between the pedal and the supporting plate, so that the structure is more stable, and meanwhile sundries are not prone to entering the sliding rail to prevent the pedal from sliding.

Description

Technical Field

[0001] The utility model belongs to the field of vehicle leg rests, and particularly relates to a four-way leg rest adjusting mechanism. Background Art

[0002] In the existing leg rest mechanisms for vehicle seats, most are two-way leg rests that can only be unfolded and cannot be further extended after unfolding, resulting in incomplete support for the passenger's calves, poor comfort, and a bad experience.

[0003] In response to this technical problem, some structures with a leg rest plate that can move back and forth have emerged on the market, enabling the leg rest plate to move back and forth while being lifted to achieve four-way adjustment.

[0004] For example, the novel multifunctional leg rest disclosed in the Chinese invention patent with the patent publication number CN115027337A, where the leg rest plate is movably arranged on the lower sliding seat. A guiding structure is provided between the corresponding leg rest plate and both sides of the lower sliding seat. A concave cavity is provided in the middle of the lower sliding seat, and synchronous wheels arranged front and back are provided in the concave cavity. A synchronous belt is wound around the synchronous wheels, and a first power source is provided. The front and back movement of the leg rest plate is achieved through the cooperation of the first power source and the guiding structures arranged on both sides of the lower sliding seat. However, connecting the leg rest plate and the lower sliding seat through the side tracks, the side guiding structures are prone to deformation when the leg rest plate bears weight. At the same time, the middle of the leg rest plate cannot be effectively supported and is prone to deformation, with poor load-bearing capacity. Additionally, debris is likely to get stuck in the guiding structures on both sides. Therefore, a four-way leg rest adjusting mechanism that can improve the load-bearing capacity and is not easily clogged with debris is needed. Summary of the Utility Model

[0005] In view of the above problems, the utility model provides a four-way leg rest adjusting mechanism, which effectively solves the problems in the prior art that the guiding structure is prone to getting stuck with debris, the middle of the leg rest plate cannot be effectively supported and is prone to deformation, and the load-bearing capacity is poor.

[0006] To achieve the above object, the technical solution adopted by the utility model is as follows: A four-way leg rest adjusting mechanism includes a linkage mechanism, which is connected to a supporting platform. A pedal is arranged on the upper side of the supporting platform, and the lower side of the pedal is slidably connected to the upper side of the supporting platform through a slide rail. A slide rail groove is arranged above the supporting platform, and the slide rail is embedded and installed in the slide rail groove. The slide rail adopts a ball slide rail.

[0007] Further, the linkage mechanism includes a motor bracket, on which a lead screw motor I is installed. The output end of the lead screw motor I is hinged to a hinge member, and the hinge member is fixedly connected to a balance push rod. A set of link assemblies are respectively fixed at both ends of the balance push rod. The supporting platform and the pedal are lifted by pushing the link assemblies with the lead screw motor.

[0008] Further, the connecting rod assembly includes a first articulated rod and a second articulated rod respectively articulated to the side of the motor bracket. The end of the balance push rod is fixed to the first articulated rod. The other end of the second articulated rod is articulated with a third articulated rod. The third articulated rod is articulated with the first articulated rod. The other end of the first articulated rod is articulated with a fourth articulated rod. The third articulated rod and the fourth articulated rod are respectively connected to the supporting platform. Through the connecting rod assembly, the supporting platform and the pedal can extend obliquely upwards. At the same time, in cooperation with the pedal slidably connected to the supporting platform, four-way adjustment is realized.

[0009] Further, a convex block is fixed on the second articulated rod. A top block for supporting the convex block when the supporting platform is retracted is arranged at the rotating connection part between the motor bracket and the first articulated rod. A support plate is fixed on the supporting platform. A supporting block fixed on the first articulated rod for supporting the support plate when the supporting platform is retracted is arranged at the rotating connection part between the first articulated rod and the balance push rod.

[0010] Further, a slide rail groove is arranged above the supporting platform, and the slide rail is embedded in the slide rail groove.

[0011] Further, the slide rail adopts a ball slide rail, and the ball slide rail moves more lightly and quietly.

[0012] Further, the ball slide rail includes a slideway installed on the supporting platform. A ball bracket is arranged on the slideway. Rollable balls are arranged on the ball bracket. A slide core is arranged on the slideway. The slide core is supported by the balls and can slide along the slideway. The slide core is fixed on a strengthening bracket, and the strengthening bracket is installed on the pedal.

[0013] Further, a slide rail groove is arranged above the supporting platform, and the slide rail is embedded in the slide rail groove, making the supporting platform and the pedal fit more closely.

[0014] Further, a first limit block is fixed on the upper side of the front end of the slideway. A second limit block is fixed on the lower side of the strengthening bracket. A limit plate is fixed at the bottom of the slideway.

[0015] Further, a screw motor two is installed below the supporting platform. The output end of the screw motor two is connected to the pedal, and the pedal is driven to automatically extend by the screw motor two.

[0016] Further, a protective plate bent downwards is arranged at the edge of the pedal, and the protective plate further prevents sundries from entering between the supporting platform and the pedal.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] In the present utility model, by arranging the sliding rail on the upper side of the supporting platform and slidingly connecting the pedal, the load-bearing capacity of the pedal and the supporting platform is higher, and the structure of the sliding part is not easily damaged and clogged with sundries. The cooperation between the protruding block and the top block and the cooperation between the supporting block and the supporting plate can make the leg rest more stable when being retracted and unfolded, improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the unfolded state of the three-dimensional structure of the present utility model;

[0020] Figure 2 is a schematic diagram of the retracted state of the three-dimensional structure of the present utility model;

[0021] Figure 3 is a schematic diagram of the position of the second lead screw motor of the present utility model;

[0022] Figure 4 is a side view schematic diagram of the ball sliding rail structure in the present utility model.

[0023] In the figure: 1 - supporting platform, 2 - pedal, 3 - sliding rail, 4 - motor bracket, 5 - first lead screw motor, 6 - hinge, 7 - balance push rod, 8 - first hinge rod, 9 - second hinge rod, 10 - third hinge rod, 11 - fourth hinge rod, 12 - second lead screw motor, 13 - protective plate, 14 - sliding rail groove, 15 - slideway, 16 - ball bracket, 17 - ball, 18 - sliding core, 19 - strengthening bracket, 20 - first limit block, 21 - second limit block, 22 - limit plate, 23 - protruding block, 24 - top block, 25 - supporting plate, 26 - supporting block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] As Figures 1 - 4 shown, a four-way leg rest adjusting mechanism includes a link mechanism. The link mechanism is hinged with a supporting platform 1. A pedal 2 is arranged on the upper side of the supporting platform 1. The lower side of the pedal 2 is slidably connected to the upper side of the supporting platform 1 through two parallel sliding rails 3. The sliding rail 3 includes a chute fixedly connected to the supporting platform 1 by screws and a sliding core 18 slidably connected in the chute. The sliding core 18 is fixedly connected to the pedal 2 by screws.

[0026] In this embodiment, the connecting rod mechanism includes a motor bracket 4, and the motor bracket 4 includes relatively arranged bracket side panels and structural reinforcement ribs connected between the bracket side panels. A screw motor 5 is arranged between the bracket side panels and is fixedly connected to the motor bracket 4 by screws. The output end of the screw motor 5 is hinged with a hinge 6, and the hinge 6 is welded with a balancing push rod 7. The two ends of the balancing push rod 7 are respectively fixed by passing through a group of connecting rod assemblies.

[0027] In this embodiment, the connecting rod assembly includes an articulated rod 1 8 and an articulated rod 2 9 respectively hinged on the sides of the motor bracket 4, the articulated rod 1 8 is located above the articulated rod 2 9, the end of the balancing push rod 7 passes through the articulated rod 1 8 to be fixed, the other end of the articulated rod 2 9 is hinged with an articulated rod 3 10, the articulated rod 3 10 is hinged with the articulated rod 1 8, the other end of the articulated rod 1 8 is hinged with an articulated rod 4 11, the articulated rod 3 10 and the articulated rod 4 11 are respectively hingedly connected to the supporting platform 1, the motor bracket 4, the articulated rod 1 8, the articulated rod 2 9, the articulated rod 3 10 and the articulated rod 4 11 are respectively articulated to the supporting platform 1, and the motor bracket 4, the articulated rod 1 8, the articulated rod 2 9, the articulated rod 3 10 and the articulated rod 4 11 are respectively articulated to the supporting platform 1. The connecting rod 3 10, the hinge rod 4 11 and the supporting platform 1 are all hinged by the hinge screws provided as the hinge axis, the hinge rod 2 9 is fixed with a protruding block 23, and the rotation connection part between the motor bracket 4 and the hinge rod 1 8 is provided with a top block 24, when the connecting rod mechanism is gradually unfolded, the protruding block 23 will gradually rotate with the hinge rod 2 9 to approach the top block 24, when the connecting rod mechanism is fully unfolded, the protruding block 23 and the top block 24 are tightly matched, and the cooperation between the protruding block 23 and the top block 24 can make the leg support more stable after unfolding, and avoid the vibration of the support plate 25 when the user uses it;

[0028] A support plate 25 is fixed on the support platform 1, and a support block 26 fixed on the hinged rod 8 is provided at the rotation connection between the hinged rod 8 and the balance push rod 7. When the connecting rod mechanism is gradually retracted, the support block 26 will gradually approach the support plate 25. When the connecting mechanism is fully unfolded, the support block 26 will support the support plate 25 to limit the position and prevent the support platform 1 from shaking after being retracted.

[0029] In addition, the stroke of the screw on the screw motor 5 when it is fully extended must be greater than the maximum stroke when the connecting rod mechanism is extended, so as to ensure that when the connecting rod mechanism is fully extended, the screw motor 5 will also move, thereby causing the connecting rod mechanism to deform a little, forming an overload, and causing the raised block 23 to rotate again while supporting the top block 24, so that the raised block 23 and the top block 24 form a tight fit to prevent vibration. Similarly, when the screw motor 5 is retracted, when the connecting rod mechanism is retracted, the screw motor 5 will also run for a longer period of time, causing the connecting rod mechanism to deform, so that the supporting block 26 and the support plate 25 are fully fitted to form a limit, thereby ensuring that after the connecting rod mechanism is retracted, the pedal 2 will not move and generate noise.

[0030] In this embodiment, two slide rail grooves 14 are arranged above the supporting platform 1, and the slide rail 3 is embedded in the slide rail groove 14, wherein the groove wall of the slide rail groove 14 can form a limit when the slide core 18 is retracted, and when the screw motor 12 controls the slide core 18 to be completely retracted, the side wall of the slide core 18 will support the side wall of the slide rail groove 14 to form a limit, thereby controlling the maximum distance that the slide core 18 moves when it is retracted and limiting the extended length of the pedal 2. The slide rail groove 14 can be used as a limit when it is retracted, and can make the supporting platform 1 and the pedal 2 closer to increase stability.

[0031] In this embodiment, the slide rail 3 is a ball bearing slide rail, which is lighter and quieter when moving;

[0032] In this embodiment, the ball slide rail includes a slide 15 installed on the supporting platform 1, a ball bracket 16 is fixed on the slide 15, a rollable ball 17 is arranged on the ball bracket 16, a placement hole is opened on the ball bracket 16, the ball 17 is placed in the placement hole and can roll, a slide core 18 is arranged on the slide 15, the slide core 18 is supported by the ball 17 and can slide along the slide 15, the slide core 18 is fixed on the reinforcement bracket 19, the reinforcement bracket 19 is installed on the pedal 2, the slide 15 is in a U-shape bent inward, and the ball bracket 16 is in a W-shape;

[0033] In this embodiment, a first limit block 20 is fixed to the upper side of the front end of the slide 15, a second limit block 21 is fixed to the lower side of the reinforcing bracket 19, and a limit plate 22 is fixed to the bottom of the slide 15. The cooperation between the second limit block 21 and the first limit block 20 limits the retracted position of the reinforcing bracket 19, thereby limiting the retracted position of the pedal 2. A baffle is fixed to the bottom of the reinforcing bracket 19 on the side of the second limit block 21, and the baffle can resist the limit plate 22. The limit plate 22 limits the extended length of the reinforcing bracket 19. When the reinforcing bracket 19 resists the baffle of the limit plate 22, the pedal 2 no longer extends, limiting the extended length of the pedal 2.

[0034] In this embodiment, a screw motor 12 is fixedly installed below the supporting platform 1 by screws, a connecting patch welded on the pedal 2 is provided on the pedal 2, and the output end of the screw motor 12 is fixedly connected to the connecting patch by screws.

[0035] In this embodiment, a downwardly bent protective plate 13 is provided on the edge of the pedal 2 , and the protective plate 13 is integrally connected to the pedal 2 .

[0036] When the utility model is in use, the screw motor 15 drives the balancing push rod 7 to be pushed forward, the balancing push rod 7 drives the hinged hinge rod 18 to move, the hinged rod 18 drives the hinged hinge rod 3 10 and the hinged rod 2 9 to move, and the hinged hinge rod 18 drives the hinged hinge rod 4 11 and the hinged rod 3 10 to make the supporting platform 1 move obliquely upward. When moving, the pedal 2 can be driven by the screw motor 2 12 to extend forward or move backward from the supporting platform 1 to achieve the movement of the pedal 2 in four directions of up, down, front and back. When the connecting rod mechanism is fully unfolded, the raised block 23 will support the top block 24 to form a limit, so that it can be tightly fitted to avoid the vibration of the support plate 25 when the user uses it.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A four-way leg support adjustment mechanism, characterized in that: It comprises a connecting rod mechanism, the connecting rod mechanism is connected to a supporting platform, a pedal is arranged on the upper side of the supporting platform, and the lower side of the pedal is slidably connected to the upper side of the supporting platform via a slide rail; The connecting rod mechanism comprises a motor bracket, a screw motor 1 is mounted on the motor bracket, an output end of the screw motor 1 is hinged with a hinge, the hinge is fixedly connected to a balancing push rod, and a group of connecting rod assemblies are respectively fixed at both ends of the balancing push rod; The connecting rod assembly includes an articulated rod 1 and an articulated rod 2 respectively articulated on the side of the motor bracket, the end of the balancing push rod is fixed to the articulated rod 1, the other end of the articulated rod 2 is articulated with an articulated rod 3, the articulated rod 3 is articulated with the articulated rod 1, the other end of the articulated rod 1 is articulated with an articulated rod 4, and the articulated rod 3 and the articulated rod 4 are respectively connected to the supporting platform; A protruding block is fixed on the second hinged rod, and a top block is provided at the rotational connection position between the motor bracket and the first hinged rod for supporting the protruding block when the supporting platform is folded. A support plate is fixed on the supporting platform, and a supporting block fixed on the first hinged rod for supporting the support plate when the supporting platform is folded is provided at the rotational connection position between the first hinged rod and the balancing push rod.

2. The four-way leg support adjustment mechanism according to claim 1, characterized in that: A slide rail groove is arranged above the supporting platform, and the slide rail is embedded and installed in the slide rail groove.

3. The four-way leg support adjustment mechanism according to claim 1, characterized in that: The slide rail adopts a ball slide rail.

4. The four-way leg support adjustment mechanism according to claim 3, characterized in that: The ball slide rail includes a slideway installed on a supporting platform, a ball bracket is provided on the slideway, a rollable ball is provided on the ball bracket, a sliding core is provided on the slideway, the sliding core is supported by the ball and can slide along the slideway, the sliding core is fixed on a reinforcing bracket, and the reinforcing bracket is installed on a pedal.

5. The four-way leg support adjustment mechanism according to claim 4, characterized in that: A first limiting block is fixed to the upper side of the front end of the slide, a second limiting block is fixed to the lower side of the reinforcing bracket, and a limiting plate is fixed to the bottom of the slide.

6. The four-way leg support adjustment mechanism according to claim 1, characterized in that: A second screw motor is installed below the supporting platform, and an output end of the second screw motor is connected to the pedal.

7. The four-way leg support adjustment mechanism according to claim 1, characterized in that: A downwardly bent protective plate is arranged on the edge of the pedal.

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