A backrest, footrest, and car seat

Abstract

This utility model discloses a backrest footrest and a car seat, including a footrest rotatably mounted on the back of the backrest. The bottom of the footrest is rotatably connected to the backrest via a pivot. The footrest is characterized by: a first connecting member at its bottom, the middle of which is rotatably sleeved on the pivot, and the bottom of which is located outside the pivot; a footrest driving unit is also provided inside the backrest, the driving end of which is connected to the bottom of the first connecting member, and the driving end of which is perpendicular to the pivot. The driving end of the footrest driving unit drives the first connecting member to rotate around the pivot, and thus drives the footrest to rotate around the pivot. This utility model extends the lifespan and comfort of the footrest while reducing space occupation.

Description

Technical Field

[0001] This utility model relates to a car seat, and more particularly to a backrest, footrest, and car seat. Background Technology

[0002] With the development of automotive technology and the improvement of living standards, consumers have increasingly higher requirements for the comfort of cars. Currently, to enrich the riding experience of middle and rear passengers, some mid-to-high-end cars provide footrests for middle and rear passengers to support their feet and relieve the discomfort caused by long-distance travel. Footrests are usually located on the back of the front seats and can be flipped down and unfolded when needed.

[0003] Existing backrests and footrests generally have two types of drive structures:

[0004] The first type uses a torsion spring structure. A torsion spring provides a restoring force to the footrest, causing it to automatically fit against the backrest. When needed, rear passengers step on the footrest; when the footrest loses its pressing force, it automatically flips back to its original position. However, this method offers a poor user experience.

[0005] The second type is an electric drive mechanism, such as application number "202221942783.1" and patent title "A Seat Backrest with Multifunctional Footrest". This structure uses gear transmission and requires an arc-shaped arm with a long arc wall, occupying a significant amount of backrest thickness space. This affects the layout of other components within the backrest, consequently impacting the functional settings of the car seat backrest, or necessitating increased backrest thickness, affecting the seat's aesthetics and cost. Furthermore, with the motor located on one side of the footrest, the driving force is transmitted from one side to the other, resulting in uneven force distribution on both sides of the footrest. Over time, this can easily lead to tilting, deformation, and damage, resulting in a high maintenance rate. Summary of the Invention

[0006] The purpose of this utility model is to provide a backrest and footrest and a car seat. By using this structure, the space occupied by the backrest is reduced, the maintenance rate of the footrest is reduced, and the stability, convenience and comfort of the backrest and footrest drive are guaranteed.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: a footrest for a backrest, comprising a footrest rotatably mounted on the back of the backrest, the bottom of the footrest being rotatably connected to the backrest via a pivot, the bottom of the footrest being provided with a first connecting member, the middle part of the first connecting member being rotatably sleeved on the pivot, and the bottom of the first connecting member being disposed outside the pivot.

[0008] The backrest is also provided with a footrest drive unit. The drive end of the footrest drive unit is connected to the bottom of the first connecting member. The drive end of the footrest drive unit is set perpendicular to the pivot. The drive end of the footrest drive unit drives the first connecting member to rotate around the pivot and drives the footrest to rotate around the pivot.

[0009] In the above technical solution, the footrest drive unit includes a motor, a screw, a mounting bracket, and a transmission component. The bottom of the transmission component is rotatably connected to the bottom of the first connecting component, and the lower part of the screw is screwed to the transmission component.

[0010] The motor is mounted inside the backrest via the mounting bracket, and the upper part of the screw is rotatably connected to the mounting bracket, with the motor configured to drive the screw to rotate.

[0011] In the above technical solution, the top of the mounting bracket is rotatably connected to the middle of the backrest, and the motor is mounted on the side wall of the mounting bracket.

[0012] In the above technical solution, the first connector has a clearance hole in the middle, and the first connector is sleeved on the outside of the rotating shaft through the clearance hole, and the diameter of the clearance hole is larger than the outer diameter of the rotating shaft.

[0013] In the above technical solution, the first connector is provided with two spaced connecting plates, the middle part of the two connecting plates is rotatably connected to the rotating shaft, and the bottom of the connecting plates is located outside the rotating shaft;

[0014] A connecting shaft is also provided, which is located beside the rotating shaft, and the two ends of the connecting shaft are connected to the bottom of the two connecting plates.

[0015] The transmission component is provided with two extension plates, and the bottom of the two extension plates are rotatably connected to the connecting shaft.

[0016] In the above technical solution, the pivot is located on the rear side of the footrest and is located near the bottom of the footrest. Mounting parts are provided on both sides of the bottom of the footrest, and the mounting parts on both sides are rotatably connected to the two ends of the pivot.

[0017] The first connector is disposed between the two mounting components.

[0018] In the above technical solution, the screw is arranged perpendicular to the rotating shaft.

[0019] In the above technical solution, when the driving end of the footrest driving unit moves downward, the top of the footrest is positioned close to the rear side of the backrest; when the driving end of the footrest driving unit moves upward, the top of the footrest flips backward and is positioned away from the rear side of the backrest.

[0020] This utility model also provides a car seat, including the aforementioned backrest and footrest.

[0021] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0022] 1. In this utility model, the driving end of the footrest driving part is set perpendicular to the rotating shaft. The driving end of the footrest driving part drives the first connecting piece to rotate around the rotating shaft, thereby realizing the rotation of the footrest around the backrest, realizing the unfolding and storage of the footrest. Compared with the previous structure using an arc-shaped wall, it can effectively reduce the space occupied, facilitate the layout of the internal parts of the backrest, and also minimize the thickness of the backrest, thereby reducing costs.

[0023] 2. In this utility model, a screw is used to drive the rotation of the footrest drive unit. Compared with the gear method, the footrest drive unit can be set in the middle or other positions of the backrest, so that the driving force on the footrest can be in the middle, ensuring the balance, stability and smoothness of the footrest rotation process.

[0024] 3. In this utility model, the driving force on the footrest is as central as possible to prevent deformation of the footrest, extend its service life, and ensure the comfort of using the footrest. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the backrest and footrest structure in Embodiment 1 of this utility model;

[0026] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure;

[0027] Figure 3 This is a three-dimensional structural diagram of the backrest and footrest in Embodiment 1 of this utility model;

[0028] Figure 4 This is a three-dimensional structural schematic diagram of the backrest and footrest in Embodiment 1 of this utility model from another perspective;

[0029] Figure 5 This is a schematic diagram of the backrest and footrest structure in Embodiment 1 of this utility model (backrest shown).

[0030] Figure 6 yes Figure 5 A magnified view of a portion of the image.

[0031] The components are: 1. Backrest; 2. Footrest; 3. Rotating shaft; 4. First connecting piece; 5. Footrest drive unit; 6. Motor; 7. Screw; 8. Mounting bracket; 9. Transmission component; 10. Mounting component; 11. Clearance hole; 12. Connecting plate; 13. Connecting shaft; 14. Extension plate; 15. Connecting plate; 16. First connecting plate. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0033] Example 1: See Figure 1-6 As shown, a backrest footrest includes a footrest 2 rotatably mounted on the rear side of a backrest 1. The bottom of the footrest 2 is rotatably connected to the backrest 1 via a pivot 3. The bottom of the footrest 2 is provided with a first connector 4. The middle part of the first connector 4 is rotatably sleeved on the pivot 3, and the bottom of the first connector 4 is located outside the pivot 3.

[0034] The backrest 1 is also provided with a footrest drive unit 5. The drive end of the footrest drive unit 5 is connected to the bottom of the first connecting member 4. The drive end of the footrest drive unit 5 is set perpendicular to the rotating shaft 3. The drive end of the footrest drive unit 5 drives the first connecting member 4 to rotate around the rotating shaft 3, and drives the footrest 2 to rotate around the rotating shaft 3.

[0035] In the accompanying drawings of this embodiment, the backrest shows a backrest panel with a forward-opening U-shaped structure. The two ends of the pivot are connected to the bottom of the backrest panel. When the footrest is folded up, it is located behind the backrest panel, with its top close to the rear side wall of the backrest panel. At this time, the bearing surface of the footrest (for supporting the user's feet) faces the rear side of the backrest panel and is close to or in contact with the rear side of the backrest panel. When the footrest is unfolded, there is an angle of 70° to 120° between the footrest and the rear side of the backrest panel (preferably around 90°, i.e., the footrest and the backrest panel are perpendicular, or around 120°, so that users in the rear seats can place their feet on the footrest at a more comfortable angle). At this time, the bearing surface of the footrest is facing upwards, making it convenient for users to place their feet on the bearing surface of the footrest. The footrest drive unit is installed within the U-shaped groove of the backrest panel, completely concealing it. The drive end of the footrest drive unit is perpendicular to the pivot point, allowing the first connecting member to rotate around the pivot point by raising and lowering the drive end, thus rotating the footrest around the pivot point and enabling the footrest to unfold and retract. This structure eliminates the need for a long, curved wall, and the first connecting member connects to the front wall of the footrest. In the unfolded state, most of the first connecting member is located below the bottom surface of the backrest, essentially concealing it and enhancing its aesthetics. It also avoids encroaching on the user's footrest area (not occupying space on the load-bearing surface). Furthermore, it utilizes only some space at the bottom of the backrest, minimizing its thickness and reducing the space occupied. This facilitates the layout of internal components, lowers material costs, and allows for the placement of other functional components, further enhancing the backrest's aesthetics.

[0036] See Figure 5 , 6 As shown, the footrest drive unit 5 includes a motor 6, a screw 7, a mounting bracket 8, and a transmission component 9. The bottom of the transmission component 9 is rotatably connected to the bottom of the first connecting member 4, and the lower part of the screw 7 is screwed to the transmission component 9. The screw and the transmission component constitute the drive end of the footrest drive unit.

[0037] The motor 6 is mounted inside the backrest 1 via the mounting bracket 8, and the upper part of the screw 7 is rotatably connected to the mounting bracket 8. The motor 6 is configured to drive the screw 7 to rotate.

[0038] In this embodiment, the mounting bracket is installed inside the backrest, specifically within a U-shaped groove in the backrest panel. A gear is located at the top of the screw, and both the gear and the top of the screw are rotatably mounted within the mounting bracket. A motor drives the gear to rotate (a transmission gear or worm gear, not shown in the figure, can be installed on the motor's output shaft to mesh with the gear). The rotation of the gear simultaneously drives the screw to rotate. Since the lower part of the screw is screwed to the transmission component, the rotation of the screw pulls the transmission component up and down. This up-and-down movement of the transmission component causes the first connecting piece and the footrest to rotate around the pivot, thus unfolding and folding the footrest (in the figure, the footrest is in a folded, folded state). The motor is powered by the vehicle.

[0039] See Figure 2 , 5 As shown, the top of the mounting bracket 8 is rotatably connected to the middle of the backrest 1, and the motor 6 is mounted on the side wall of the mounting bracket 8. In this embodiment, when the first connecting member rotates around the pivot, the connection between the first connecting member and the transmission member moves in an arc around the pivot. The movement trajectory of the bottom of the first connecting member is an arc. When the screw rotates, the transmission member moves axially relative to the screw. To ensure that the screw and the transmission member are properly screwed together and that the transmission member can move smoothly relative to the screw, the top of the mounting bracket is rotatably connected to the backrest, so that the screw can also rotate at a certain angle relative to the backrest. When the first connecting member rotates around the pivot and the transmission member rotates at a certain angle, the screw is properly screwed together with the transmission member. This ensures that the movement trajectories of the bottom of the first connecting member and the bottom of the transmission member are arc, allowing the transmission member to smoothly screw together with the screw and preventing jamming during screw rotation.

[0040] See Figure 2 , 5 As shown, the pivot 3 is located on the rear side of the footrest 2 and is located near the bottom of the footrest 2. Mounting members 10 are provided on both sides of the bottom of the footrest 2, and the mounting members 10 on both sides are rotatably connected to the two ends of the pivot 3.

[0041] The first connector 4 is disposed between the two mounting members 10.

[0042] In this embodiment, the mounting component is rotatably mounted on the rotating shaft, and both ends of the rotating shaft are fixedly connected to the backrest (or the mounting component and the rotating shaft are fixedly connected, and the rotating shaft and the backrest are rotatably connected; in this case, the footrest drive unit drives the footrest and the rotating shaft to rotate around the backrest). In this structure, there are three points at the connection between the footrest and the pivot: the two ends and the middle of the footrest can all be supported by the pivot. This makes the force more balanced when the footrest rotates around the pivot, preventing problems such as rotational jamming due to unbalanced force, or tilting, wobbling, and damage to the footrest after unfolding due to wear on one side. (In previous structures, a gear drive was used, with a gear on one side of the pivot. The motor drove the gear to rotate. Since one side of the pivot was subjected to the rotational driving force first, for example, if the gear was on the left side of the pivot, the left side of the pivot was subjected to greater force, which made the connection between the left side of the pivot and the backrest more prone to wear. This resulted in a certain gap between the left side of the pivot and the backrest, which in turn caused a greater tilt angle on the left side of the footrest. This created a height difference between the left and right sides of the footrest, making it uncomfortable for the user to step on. At the same time, due to the footrest tilting for a long time, the footrest was deformed or even cracked after being stepped on. Moreover, the gap at the connection between the left side of the pivot and the backrest caused wobbling.) This structure also improves the user experience.

[0043] See Figure 5 , 6 As shown, the first connector 4 has a relief hole 11 in the middle. The first connector 4 is sleeved on the outside of the rotating shaft 3 through the relief hole 11, and the diameter of the relief hole 11 is larger than the outer diameter of the rotating shaft 3.

[0044] In this embodiment, the diameter of the clearance hole is larger than the outer diameter of the rotating shaft, and the clearance hole and the footrest are coaxially arranged. Under normal circumstances, when the footrest drive unit drives the footrest to rotate, the first connector avoids contact with the rotating shaft as much as possible. The external force on the first connector is directly transmitted to the footrest, and the motor does not require more power due to the contact friction with the rotating shaft, thereby minimizing the power required by the motor, reducing costs, and reducing the possibility of motor damage. Of course, since the footrest has a certain width (generally using plastic or metal that is not easily damaged and has a certain strength as the frame), especially after being subjected to the weight of the user's foot, the middle part will have a certain elastic deformation. After the middle part may deform downwards, the inner surface of one side of the clearance hole will abut against the outer surface of the rotating shaft, and this gravity can also be transmitted to the rotating shaft through the first connector. When no external force is applied, or when the external force decreases, it will return to its original shape. When the footrest is stored later, the inner surface of the clearance hole does not contact the outer surface of the rotating shaft, preventing wear on the rotating shaft and the first connector. Even after the footrest deforms under weight, in the unfolded state, a portion of the inner surface of the clearance hole remains in contact with the pivot. When the footrest drive unit retracts the footrest, only a portion of the first connecting piece contacts the pivot, resulting in less friction compared to a system where the pivot is always in complete contact with the clearance hole. Alternatively, a bearing can be installed between the clearance hole and the pivot, ensuring smooth rotation of the footrest driven by the footrest drive unit (using a bearing increases cost and overall backrest weight; there are advantages and disadvantages, and the choice should be based on the specific circumstances).

[0045] See Figure 5 , 6 As shown, the first connector 4 is provided with two spaced connecting plates 12, the middle part of the two connecting plates 12 is rotatably connected to the rotating shaft 3, and the bottom of the connecting plate 12 is located outside the rotating shaft 3.

[0046] A connecting shaft 13 is also provided, which is located on the side of the rotating shaft 3, and the two ends of the connecting shaft 13 are connected to the bottom of the two connecting plates 12.

[0047] The transmission component 9 is provided with two extension plates 14, and the bottom of the two extension plates 14 are rotatably connected to the connecting shaft 13.

[0048] In this embodiment, the transmission component is a U-shaped plate, including a connecting plate 15 and extension plates 14 on both sides of the bottom of the connecting plate 15. The top of the extension plates is connected to both ends of the connecting plate. The connecting plate has screw holes for screwing the screw. When the screw rotates and drives the transmission component to move upward, the bottom of the screw passes between the two extension plates, allowing the screw to make room. The first connecting component 4 also adopts a U-shaped structure, including a first connecting plate 16 and connecting plates 12 at both ends. The top of the two connecting plates is connected to the bottom sides of the first connecting plate. The rear side of the first connecting plate and the connecting plates is fixedly connected to the front side wall of the footrest. Each connecting plate is provided with a clearance hole. In this structure, both the first connecting component and the transmission component adopt a U-shaped structure (hollowed-out part), which can reduce the use of materials, reduce costs, and ensure their strength.

[0049] The screw is positioned perpendicular to the rotating shaft. In this configuration, the footrest drive unit can be positioned above the rotating shaft and as centrally located as possible to ensure that the center of the footrest receives driving force and to facilitate the layout of the footrest drive unit.

[0050] When the driving end of the footrest drive unit moves downward, the top of the footrest is positioned close to the rear side of the backrest, meaning the bearing surface of the footrest faces the rear side of the backrest. At this time, the footrest is folded and stored. When the driving end of the footrest drive unit moves upward, the top of the footrest flips backward and moves away from the rear side of the backrest, meaning the bearing surface of the footrest faces upward. At this time, the footrest is unfolded so that the user can place their feet on the footrest for foot support.

[0051] This utility model also provides a car seat, including the aforementioned backrest and footrest.

[0052] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of the invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0053] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. For instance, the two components can be mechanically connected by contact or abutting; they can also be directly hooked or connected by an intermediate medium; or they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

Claims

1. A footrest for a backrest, comprising a footrest rotatably mounted on the back of a backrest, the bottom of the footrest being rotatably connected to the backrest via a pivot, characterized in that: The footrest has a first connector at its bottom, the middle part of which is rotatably sleeved on the pivot, and the bottom of which is located outside the pivot. The backrest is also provided with a footrest drive unit. The drive end of the footrest drive unit is connected to the bottom of the first connecting member. The drive end of the footrest drive unit is set perpendicular to the pivot. The drive end of the footrest drive unit drives the first connecting member to rotate around the pivot and drives the footrest to rotate around the pivot.

2. The backrest and footrest according to claim 1, characterized in that: The footrest drive unit includes a motor, a screw, a mounting bracket, and a transmission component. The bottom of the transmission component is rotatably connected to the bottom of the first connecting component, and the lower part of the screw is screwed to the transmission component. The motor is mounted inside the backrest via the mounting bracket, and the upper part of the screw is rotatably connected to the mounting bracket, with the motor configured to drive the screw to rotate.

3. The backrest and footrest according to claim 2, characterized in that: The top of the mounting bracket is rotatably connected to the middle of the backrest, and the motor is mounted on the side wall of the mounting bracket.

4. The backrest and footrest according to claim 2, characterized in that: The first connector has a clearance hole in the middle, and the first connector is sleeved on the outside of the rotating shaft through the clearance hole, and the diameter of the clearance hole is larger than the outer diameter of the rotating shaft.

5. The backrest and footrest according to claim 2, characterized in that: The first connector has two spaced connecting plates, the middle of which is rotatably connected to the rotating shaft, and the bottom of the connecting plates is located outside the rotating shaft. A connecting shaft is also provided, which is located beside the rotating shaft, and the two ends of the connecting shaft are connected to the bottom of the two connecting plates. The transmission component is provided with two extension plates, and the bottom of the two extension plates are rotatably connected to the connecting shaft.

6. The backrest and footrest according to claim 1, characterized in that: The pivot is located on the rear side of the footrest and is positioned close to the bottom of the footrest. Mounting members are provided on both sides of the bottom of the footrest, and the mounting members on both sides are rotatably connected to the two ends of the pivot. The first connector is disposed between the two mounting components.

7. The backrest and footrest according to claim 2, characterized in that: The screw is arranged perpendicular to the rotating shaft.

8. The backrest and footrest according to claim 1, characterized in that: When the driving end of the footrest drive unit moves downward, the top of the footrest is positioned close to the rear side of the backrest; when the driving end of the footrest drive unit moves upward, the top of the footrest flips backward and is positioned away from the rear side of the backrest.

9. A car seat, characterized in that: Including the backrest and footrest as described in any one of claims 1-8.

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