A car seat that can be rotated in the opposite direction

Abstract

The present application relates to the technical field of automobile seat, and discloses a car seat capable of being reversed for riding, which has a forward mode for passengers to ride forward and a reverse mode for passengers to ride reversely, and comprises a base provided with a first gear and a second gear respectively, the second gear being engaged with the first gear; a first connecting rod and a second connecting rod are respectively arranged on the first gear and the second gear; a cushion is provided with a cushion support; a backrest is movably arranged on the base, and when the car seat is in the forward mode, the backrest is located at the rear end of the cushion; when the car seat is switched from the forward mode to the reverse mode, the backrest is lifted upward from the rear end of the cushion, passes above the cushion and is switched to the front end of the cushion; a backrest support is arranged on the backrest; and a locking structure is used to lock the backrest. The present application has the advantages of simple overall structure, low cost, small space required for mode switching and high comfort of passengers riding forward and reversely.

Description

Technical Field

[0001] This invention relates to the field of automotive seat technology, and more particularly to an automotive seat that can be rotated for seating. Background Technology

[0002] Reversible car seats are widely used in MPVs. Reversible first-row seats enhance interaction between passengers; reversible second-row seats facilitate business activities and provide privacy; and reversible third-row seats are ideal for fishing and camping.

[0003] Among existing rear-facing car seats, the methods for changing the seating direction include rotating the seat and folding it down. Rotating the seat requires a large amount of space, necessitating clearance in the X and Y directions during rotation, and sufficient height in the Z direction for the mechanism. Folding the seat swaps the backrest and seat cushion positions, creating a height difference between them. This results in an excessively long leg rest and a short backrest, leading to poor comfort for rear-facing passengers. Furthermore, the folding action requires additional interior space, making it suitable only for rear seats and trunks. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by the present invention is to provide a car seat that can be rotated for high passenger comfort and requires little space.

[0005] The technical solution adopted by this invention to solve its technical problem is to propose a car seat that can be reversed for seating, having a forward-facing mode for passengers to sit facing forward and a reverse-facing mode for passengers to sit facing backward, and it can switch between the forward-facing mode and the reverse-facing mode. The car seat includes:

[0006] A base is provided with a first gear and a second gear. The first gear is rotatably mounted on the base via a rotating shaft, and a third gear is provided on the rotating shaft. The third gear rotates synchronously with the first gear, and the second gear meshes with the first gear. A first connecting rod and a second connecting rod are respectively provided on the first gear and the second gear.

[0007] A seat cushion is movably mounted on the base. A seat cushion support is provided on the seat cushion, and the seat cushion support is provided with a gear tooth structure, which meshes with the third gear.

[0008] The backrest is movably mounted on the base. When the car seat is in the forward-facing mode, the backrest is located at the rear end of the seat cushion. When the car seat switches from the forward-facing mode to the reverse-facing mode, the backrest is lifted upward from the rear end of the seat cushion, passes over the seat cushion, and is switched to the front end of the seat cushion.

[0009] The backrest is equipped with a backrest bracket. The first connecting rod is rotatably connected to the backrest bracket. A third connecting rod is provided between the second connecting rod and the backrest bracket. The third connecting rod and the first connecting rod are arranged in parallel and a plurality of synchronizing rods are provided between them. The third connecting rod is rotatably connected to the second connecting rod and the backrest bracket respectively.

[0010] A locking structure is provided on the backrest bracket. When the car seat is switched to the forward-facing mode or the reverse-facing mode, the locking structure can lock the backrest.

[0011] Furthermore, the base, the first link, the backrest bracket, the third link, and the second link form a five-bar linkage.

[0012] Furthermore, the backrest support is provided with a first elongated groove, and the third connecting rod is provided with a second elongated groove;

[0013] The end of the first connecting rod away from the first gear is slidably disposed in the first elongated groove, and a first tension spring is provided between the first connecting rod and the backrest bracket. The elastic force of the first tension spring acts on the first connecting rod, causing the end of the first connecting rod away from the first gear to maintain a tendency to move towards the lower end of the first elongated groove.

[0014] The end of the second connecting rod away from the second gear is slidably disposed in the second elongated groove, and a second tension spring is provided between the second connecting rod and the third connecting rod. The elastic force of the second tension spring acts on the second connecting rod, causing the end of the second connecting rod away from the second gear to maintain a tendency to move towards the end of the second elongated groove closer to the second gear.

[0015] Furthermore, when the car seat switches from the forward-facing mode to the reverse-facing mode, or from the reverse-facing mode to the forward-facing mode:

[0016] The first gear rotates, causing the first connecting rod to rotate, and simultaneously the second gear causes the second connecting rod to rotate; the end of the first connecting rod away from the first gear slides upward in the first elongated groove, compressing the first tension spring; the end of the second connecting rod away from the second gear slides towards the end away from the second gear in the second elongated groove, compressing the second tension spring; thereby reducing the height that the backrest needs to be raised.

[0017] Furthermore, the end of the first connecting rod away from the first gear has a first sliding bolt, which abuts against the first tension spring;

[0018] The end of the second connecting rod away from the second gear has a second sliding bolt, which abuts against the second tension spring.

[0019] Furthermore, the number of teeth of the first gear is twice that of the second gear, and the rotational speed of the second gear during transmission is twice that of the first gear;

[0020] The number of teeth in the gear structure is nine times the number of teeth in the third gear, and the rotational speed of the gear structure during transmission is nine times the rotational speed of the third gear;

[0021] When the car seat switches from the forward-facing mode to the reverse-facing mode, or from the reverse-facing mode to the forward-facing mode: the first gear rotates 180 degrees, the second gear rotates 360 degrees, and the gear structure rotates 20 degrees.

[0022] Furthermore, when the car seat is in the forward-facing mode, the seat cushion tilts downwards by 10 degrees from front to back; when the car seat is in the reverse-facing mode, the seat cushion tilts downwards by 10 degrees from back to front.

[0023] The gear structure is configured as an internal gear ring, the base is provided with a central gear, and a plurality of planetary gears are provided between the central gear and the internal gear to mesh with both. The third gear is configured as one of the planetary gears, and the internal gear ring, the central gear and the plurality of planetary gears cooperate to form a planetary gear system.

[0024] Furthermore, the base is provided with a drive motor, the output shaft of the drive motor is configured as the shaft, and the drive motor can drive the first gear and the third gear to rotate synchronously;

[0025] The drive motor can drive the car seat to switch between the forward-facing mode and the reverse-facing mode.

[0026] Furthermore, a first buckle is provided on the base near the rear end of the seat cushion, and a second buckle is provided near the front end of the seat cushion;

[0027] When the car seat switches from the forward-facing mode to the reverse-facing mode, the locking structure disengages from the first latch and locks to the second latch in the vertical direction; when the car seat switches from the reverse-facing mode to the forward-facing mode, the locking structure disengages from the second latch and locks to the first latch in the vertical direction.

[0028] Furthermore, the plurality of synchronizing rods include a first synchronizing rod and a second synchronizing rod arranged in parallel, one end of both the first synchronizing rod and the second synchronizing rod being rotatably connected to the first connecting rod, and the other end of both the first synchronizing rod and the second synchronizing rod being rotatably connected to the third connecting rod.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects:

[0030] In this invention, the car seat is adjustable to forward-facing and rear-facing modes, suitable for passengers to sit facing forward and rear-facing respectively. In actual use, when the car is in forward-facing mode, the backrest is located near the rear end of the seat cushion. The rotating shaft drives the first gear to rotate, and the third gear rotates synchronously with the first gear, with the first gear meshing with the second gear. The rotation of the first gear drives the first connecting rod to rotate, the rotation of the second gear drives the second connecting rod to rotate, and the rotation of the third gear drives the seat cushion to rotate. The first and third connecting rods are equipped with multiple synchronous rods to ensure that the first and third connecting rods always move in parallel. The first and third connecting rods lift the backrest support, that is, lift the backrest. As the rotating shaft continues to rotate, the backrest is lifted from the rear end of the seat cushion, passes over the seat cushion, and moves to the front end of the seat cushion until the locking structure locks into the latch near the front end of the seat cushion. The car seat then switches to rear-facing mode. During this process, the backrest moves from the rear end of the seat cushion to the front end, and the seat cushion moves from a backward tilt of about 10 degrees to a forward tilt of about 10 degrees. Conversely, the car seat can also be switched from rear-facing mode to forward-facing mode. This solution enables multi-scenario use of the car seat, applicable to front, middle, and rear seats. The overall structure is simple, simplifying existing structures and reducing costs. It allows for both manual and electric adjustment, ensuring high comfort for passengers in both forward-facing and rear-facing modes. When the car seat locks in both forward-facing and rear-facing modes, it locks vertically, meeting the requirements for the latch arrangement and conforming to the force-releasing direction of the floor lock, ensuring reliable locking.

[0031] In this invention, a first elongated groove is formed on the backrest support, and one end of the first connecting rod is slidably disposed in the first elongated groove; a second elongated groove is formed on the third connecting rod, and one end of the second connecting rod is slidably disposed in the second elongated groove. When switching the car seat to forward or reverse orientation, as the backrest is raised, the end of the first connecting rod moves towards the upper end of the first elongated groove and compresses the first tension spring, while the end of the second connecting rod moves towards the rear end of the second elongated groove and compresses the second tension spring. This effectively reduces the upward lifting distance of the backrest, allowing the switching to be completed without occupying a large Z-axis space. Furthermore, in the event of a collision, the first elongated groove, the second elongated groove, the first tension spring, and the second tension spring have a buffering effect, reducing the stress on the mechanism. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the car seat in the forward-facing mode of the present invention;

[0033] Figure 2 for Figure 1 A plan view;

[0034] Figure 3 A plan view of a car seat when switched to rear-facing mode;

[0035] Figure 4 for Figure 1 A schematic diagram of the structure of a car seat that retains only one side (with the backrest removed);

[0036] Figure 5 for Figure 4 A structural diagram from another perspective;

[0037] Figure 6 for Figure 4 A schematic diagram of the middle section structure;

[0038] Figure 7 for Figure 6 A structural diagram from another perspective.

[0039] In the picture:

[0040] 1. Base; 10. Drive motor; 100. Rotating shaft; 11. First gear; 110. First connecting rod; 110A. First sliding bolt; 12. Second gear; 120. Second connecting rod; 120A. Second sliding bolt; 13. Third gear; 14. Third connecting rod; 140. Second elongated groove; 15. First tension spring; 16. Second tension spring; 17A. First synchronizing rod; 17B. Second synchronizing rod; 18. First latch; 19. Second latch;

[0041] 2. Seat cushion; 20. Seat cushion support; 201. Gear tooth structure; 21. Central gear; 22. Planetary gear;

[0042] 3. Backrest; 30. Backrest support; 301. First long groove;

[0043] 4. Locking structure. Detailed Implementation

[0044] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0045] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0046] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0049] like Figures 1-5 As shown, a reversible car seat has a forward-facing mode for passengers to sit facing forward and a reverse-facing mode for passengers to sit facing backward, and can switch between the two modes. In the forward-facing mode, the backrest 3 is at the rear of the seat cushion, and the passenger faces forward when sitting in the car seat. In the reverse-facing mode, the backrest 3 is at the front of the seat cushion 2, and the passenger faces backward when sitting in the car seat.

[0050] The car seat in this embodiment mainly includes: a base 1, a seat cushion 2, a backrest 3, a locking structure 4 disposed on the backrest 3, and a gear and linkage transmission mechanism disposed between the base 1, the seat cushion 2, and the backrest 3.

[0051] The base 1 serves as the overall support structure for the car seat, comprising two symmetrically arranged parts to ensure reliable overall support of the car seat. During use, the base 1 is fixed to the vehicle floor. A first gear 11 and a second gear 12 are respectively mounted on the base 1. The first gear 11 is rotatably mounted on the base 1 via a rotating shaft 100, and a third gear 13 is mounted on the rotating shaft 100. The third gear 13 is coaxially arranged with the first gear 11 and rotates synchronously with the first gear 11, driven by the same rotating shaft 100. The second gear 12 meshes with the first gear 11. A first connecting rod 110 and a second connecting rod 120 are respectively mounted on the first gear 11 and the second connecting rod 120. Specifically, the first connecting rod 110 is welded integrally with the first gear 11, and the second connecting rod 120 is welded integrally with the second gear 12. Two spaced-apart support plates are provided on both the left and right sides of the base 1, and both the first gear 11 and the second gear 12 are rotatably mounted between the two support plates. When the rotating shaft 100 rotates, it drives the first gear 11 and the third gear 13 to rotate synchronously, and the first gear 11 meshes with the second gear 12. The first connecting rod 110 is linked with the first gear 11, and the second connecting rod 120 is linked with the second gear 12.

[0052] The seat cushion 2 is movably mounted on the base 1 and can be rotated and adjusted on the base 1. A seat cushion support 20 is mounted on the seat cushion 2 and is fixedly connected to the main body of the seat cushion 2. The seat cushion support 20 has a gear tooth structure 201, specifically an internal gear ring, which meshes with a third gear 13. In actual use, the rotating shaft 100 drives the third gear 13, which meshes with the gear tooth structure 201, causing the seat cushion support 20 to rotate, thus allowing the seat cushion 2 to rotate and be adjusted.

[0053] The backrest 3 is movably mounted on the base 1. When the car seat is in forward-facing mode, the backrest 3 is located at the rear end of the seat cushion 2. When the car seat switches from forward-facing to rear-facing mode, the backrest 3 is lifted from the rear end of the seat cushion 2, passes over the seat cushion 2, and is switched to the front end of the seat cushion 2. That is, during the switching process between forward-facing and rear-facing modes, the backrest 3 is lifted and moves between the rear end and the front end of the seat cushion 2. Specifically, in forward-facing mode, the backrest 3 is located at the rear end of the seat cushion 2, and the front of the backrest 3 can be used for back support when the passenger is sitting in the car seat. After switching to rear-facing mode, the backrest 3 is located at the front end of the seat cushion 2, and the other side (i.e., the reverse side) of the backrest 3 can be used for back support when the passenger is sitting in the car seat. This eliminates the need to flip the backrest 3 into the seat cushion 2 and the seat cushion 2 into the backrest 3, thus effectively ensuring passenger comfort regardless of whether the passenger is in forward-facing or rear-facing mode. It can also be linked with the seat cushion 2 movement and shoulder adjustment mechanism to achieve a comfortable riding experience whether sitting forward or backward.

[0054] More specifically, a backrest bracket 30 is mounted on the backrest 3, and the backrest bracket 30 is fixedly connected to the backrest 3. A first connecting rod 110 is rotatably connected to the backrest bracket 30. A third connecting rod 14 is provided between the second connecting rod 120 and the backrest bracket 30. The third connecting rod 14 and the first connecting rod 110 are arranged parallel to each other, and several synchronizing rods are provided between them. These synchronizing rods include a first synchronizing rod 17A and a second synchronizing rod 17B arranged parallel to each other. One end of each of the first synchronizing rod 17A and the second synchronizing rod 17B is rotatably connected to the first connecting rod 110, and the other end of each of the first synchronizing rod 17A and the second synchronizing rod 17B is rotatably connected to the third connecting rod 14. The synchronizing rods ensure that the first connecting rod 110 and the third connecting rod 14 remain parallel during movement. The third connecting rod 14 is rotatably connected to both the second connecting rod 120 and the backrest bracket 30. Specifically, a five-bar linkage is formed between the base 1, the first link 110, the backrest bracket 30, the third link 14, and the second link 120. That is, there is one of these five-bar linkages on each side of the car seat, which ensures that the backrest 3 and the seat cushion 2 are subjected to balanced forces on the left and right sides during movement and that unilateral deflection does not occur.

[0055] A locking structure 4, mounted on the backrest bracket 30, locks the backrest 3 when the car seat is switched to forward or rear-facing mode. Specifically, a first buckle 18 is located on each side of the base 1 near the rear end of the seat cushion 2, and a second buckle 19 is located on each side of the base 1 near the front end of the seat cushion 2. The first buckles 18 and the second buckles 19 have the same structure, ensuring that the locking structure 4 on both sides of the bottom of the backrest 3 can be locked onto the two buckles regardless of whether the car seat is in forward or rear-facing mode, ensuring reliable locking and thus guaranteeing the structural stability of the car seat. In actual use, when the car seat is switched from forward to rear-facing mode, the locking structure 4 disengages from the first buckle 18 and locks vertically to the second buckle 19. When the car seat is switched from rear-facing to forward mode, the locking structure 4 disengages from the second buckle 19 and locks vertically to the first buckle 18. When the car seat is in forward or reverse mode, the locking structure 4 locks vertically, which meets the requirements of the latch arrangement and the force-disengagement direction of the floor lock, ensuring reliable locking.

[0056] In this embodiment, the car seat can switch between two modes either manually or electrically. In the manual mode, there is no need for a drive motor 10; after unlocking the locking structure 4, the user can directly push the backrest 3 to switch between the two modes. When switched electrically, a drive motor 10 needs to be mounted on the base 1. Specifically, the base 1 houses the drive motor 10, and the output shaft 100 of the drive motor 10 is configured as a rotating shaft 100, which drives the first gear 11 and the third gear 13 to rotate synchronously. This allows the drive motor 10 to switch the car seat between forward-facing and rear-facing modes.

[0057] Preferably, such as Figures 2-7 As shown, the backrest support 30 has a first elongated groove 301, and the third connecting rod 14 has a second elongated groove 140. The end of the first connecting rod 110 away from the first gear 11 is slidably disposed in the first elongated groove 301, and a first tension spring 15 is disposed between the first connecting rod 110 and the backrest support 30. The first tension spring 15 is located in the first elongated groove 301, and the elastic force of the first tension spring 15 acts on the first connecting rod 110, causing the end of the first connecting rod 110 away from the first gear 11 to maintain a tendency to move towards the lower end of the first elongated groove 301. The end of the second connecting rod 120 away from the second gear 12 is slidably disposed in the second elongated groove 140, and a second tension spring 16 is provided between the second connecting rod 120 and the third connecting rod 14. The second tension spring 16 is located in the second elongated groove 140, and the elastic force of the second tension spring 16 acts on the second connecting rod 120, so that the end of the second connecting rod 120 away from the second gear 12 maintains a tendency to move towards the end of the second elongated groove 140 closer to the second gear 12.

[0058] When the car seat switches from forward-facing to rear-facing mode, or vice versa: the first gear 11 rotates, causing the first connecting rod 110 to rotate, and simultaneously, through the second gear 12, causing the second connecting rod 120 to rotate; the end of the first connecting rod 110 away from the first gear 11 slides upward in the first elongated groove 301, compressing the first tension spring 15; the end of the second connecting rod 120 away from the second gear 12 slides towards the end away from the second gear 12 in the second elongated groove 140, compressing the second tension spring 16; this reduces the height the backrest 3 needs to be raised. This structure significantly saves Z-axis space in the vehicle, allowing for forward and rear-facing seat switching within a small space.

[0059] More specifically, the end of the first connecting rod 110 away from the first gear 11 has a first sliding bolt 110A, which can be understood as the first sliding bolt 110A being configured as one end of the first connecting rod 110, and the first sliding bolt 110A abuts against the first tension spring 15. The end of the second connecting rod 120 away from the second gear 12 has a second sliding bolt 120A, which can be understood as the second sliding bolt 120A being configured as one end of the second connecting rod 120, and the second sliding bolt 120A abuts against the second tension spring 16.

[0060] In practical use, this embodiment features a first elongated groove 301 on the backrest bracket 30, with one end of the first connecting rod 110 slidably disposed within it. A second elongated groove 140 is formed on the third connecting rod 14, with one end of the second connecting rod 120 slidably disposed within it. When switching the car seat between forward and reverse orientations, as the backrest 3 is raised, the end of the first connecting rod 110 moves towards the upper end of the first elongated groove 301, compressing the first tension spring 15. The end of the second connecting rod 120 moves towards the rear end of the second elongated groove 140, compressing the second tension spring 16. This effectively reduces the upward lifting distance of the backrest 3, allowing the switching to be completed without requiring a large Z-axis space. Furthermore, in the event of a collision, the first elongated groove 301, the second elongated groove 140, the first tension spring 15, and the second tension spring 16 provide compressible areas, acting as a buffer to reduce the force on the mechanism, concentrating the force on the floor lock.

[0061] As an optimal implementation of this embodiment: the number of teeth of the first gear 11 is twice that of the second gear 12, so the rotational speed of the second gear 12 during transmission is twice that of the first gear 11. The number of teeth of the gear tooth structure 201 is nine times that of the third gear 13, so the rotational speed of the gear tooth structure 201 during transmission is nine times that of the third gear 13. When the car seat switches from forward-facing mode to reverse-facing mode, or from reverse-facing mode to forward-facing mode: the first gear 11 rotates 180 degrees, that is, the first connecting rod 110 rotates 180 degrees; the second gear 12 rotates 360 degrees to return to its original position, that is, the second connecting rod 120 rotates 360 degrees; and the gear tooth structure 201 rotates 20 degrees, that is, the seat cushion support 20 and the seat cushion 2 rotate 20 degrees. To explain, when the car seat is in forward-facing mode, the seat cushion 2 tilts downwards by 10 degrees from front to back; when the car seat is in reverse-facing mode, the seat cushion 2 tilts downwards by 10 degrees from back to front. Therefore, the gear structure 201 rotates a total of 20 degrees.

[0062] Preferably, the gear structure 201 in this embodiment is configured as an internal gear ring, a central gear 21 is provided on the base 1, and a plurality of planetary gears 22 meshing with the central gear 21 and the internal gear are provided between the two. The third gear 13 is configured as one of the planetary gears 22, and the internal gear ring, the central gear 21 and the plurality of planetary gears 22 cooperate to form a planetary gear 22 system, which ensures smooth movement.

[0063] In this embodiment, the car seat is adjustable to forward-facing and rear-facing modes, suitable for passengers to sit facing forward and rear-facing respectively. In actual use, when the car is in forward-facing mode, the backrest 3 is positioned near the rear end of the seat cushion 2. The rotating shaft 100 drives the first gear 11 to rotate, and the third gear 13 rotates synchronously with the first gear 11. The first gear 11 meshes with and drives the second gear 12. The rotation of the first gear 11 drives the first connecting rod 110 to rotate, the rotation of the second gear 12 drives the second connecting rod 120 to rotate, and the rotation of the third gear 13 drives the seat cushion 2 to rotate. The first connecting rod 11... Multiple synchronous rods are set in the first link 110 and the third link 14 to ensure that the first link 110 and the third link 14 always move in parallel. The first link 110 and the third link 14 lift the backrest bracket 30, that is, lift the backrest 3. As the pivot 100 continues to rotate, the backrest 3 is lifted from the rear end of the seat cushion 2, passes over the seat cushion 2, and moves to the front end of the seat cushion 2 until the locking structure 4 locks into the latch near the front end of the seat cushion 2. The car seat switches to the rear-facing mode. During this process, the backrest 3 moves from the rear end of the seat cushion 2 to the front end, and the seat cushion 2 moves from a backward tilt of about 10 degrees to a forward tilt of about 10 degrees. Conversely, the car seat can also be switched from the rear-facing mode to the forward-facing mode. This solution realizes the multi-scenario use of the car seat, which can be applied to the front, middle and rear seats. The overall implementation structure is simple, which simplifies the existing structure and reduces the manufacturing cost. Moreover, it can realize both manual and electric adjustment, which can ensure high comfort for passengers when sitting forward and rear-facing.

Claims

1. A reversible direction vehicle seat having a forward mode for a passenger to sit in a forward direction, and a reverse mode for the passenger to sit in a reverse direction, and being switchable between the forward mode and the reverse mode, characterized by, The automobile seat comprises: a base, a first gear and a second gear are arranged on the base respectively, the first gear is rotatably arranged on the base through a rotating shaft, a third gear is arranged on the rotating shaft, the third gear rotates synchronously with the first gear, and the second gear is engaged with the first gear; a first connecting rod and a second connecting rod are arranged on the first gear and the second gear respectively; a seat cushion is movably arranged on the base, a seat cushion support is arranged on the seat cushion, a gear structure is arranged on the seat cushion support, and the gear structure is engaged with the third gear; a backrest is movably arranged on the base, when the automobile seat is in the forward mode, the backrest is at the rear end of the seat cushion, when the automobile seat is switched from the forward mode to the reverse mode, the backrest is lifted upward from the rear end of the seat cushion, passes above the seat cushion, and is switched to the front end of the seat cushion; a backrest support is arranged on the backrest, the first connecting rod is rotatably connected with the backrest support, a third connecting rod is arranged between the second connecting rod and the backrest support, the third connecting rod is arranged in parallel with the first connecting rod, a plurality of synchronous rods are arranged between the third connecting rod and the first connecting rod, and the third connecting rod is rotatably connected with the second connecting rod and the backrest support respectively; a locking structure is arranged on the backrest support, when the automobile seat is switched to the forward mode or the reverse mode, the locking structure can lock the backrest; a first long slot is arranged on the backrest support, a second long slot is arranged on the third connecting rod, one end of the first connecting rod away from the first gear is slidably arranged in the first long slot, a first tension spring is arranged between the first connecting rod and the backrest support, the elastic force of the first tension spring acts on the first connecting rod, so that one end of the first connecting rod away from the first gear tends to move towards the lower end of the first long slot, one end of the second connecting rod away from the second gear is slidably arranged in the second long slot, and a second tension spring is arranged between the second connecting rod and the third connecting rod, the elastic force of the second tension spring acts on the second connecting rod, so that one end of the second connecting rod away from the second gear tends to move towards one end of the second long slot close to the second gear.

2. The reversible direction ride vehicle seat of claim 1, wherein, A five-link mechanism is formed between the base, the first connecting rod, the backrest support, the third connecting rod and the second connecting rod.

3. The reversible direction ride vehicle seat of claim 1, wherein, When the automobile seat is switched from the forward mode to the reverse mode, or from the reverse mode to the forward mode: the first gear rotates, the first connecting rod rotates, the second connecting rod rotates through the second gear, one end of the first connecting rod away from the first gear slides upward in the first long slot and compresses the first tension spring, one end of the second connecting rod away from the second gear slides away from one end of the second long slot and compresses the second tension spring, and the height that the backrest needs to be lifted is reduced.

4. The reversible direction riding automobile seat according to claim 1 or 3, characterized by The first connecting rod has a first sliding bolt at one end away from the first gear, which is opposite to the first tension spring; The second connecting rod has a second sliding bolt at one end away from the second gear, which is opposite to the second tension spring.

5. The reversible direction ride vehicle seat of claim 1, wherein, The first gear has twice the number of teeth of the second gear, and the second gear rotates at twice the speed of the first gear when transmitting power; The gear structure has nine times the number of teeth of the third gear, and the gear structure rotates at nine times the speed of the third gear when transmitting power; When the car seat switches from the forward mode to the reverse mode, or from the reverse mode to the forward mode: the first gear rotates 180 degrees, the second gear rotates 360 degrees, and the gear structure rotates 20 degrees.

6. The reversible direction ride vehicle seat of claim 5, wherein, When the car seat is in the forward mode, the seat cushion is inclined downward by 10 degrees from front to back; when the car seat is in the reverse mode, the seat cushion is inclined downward by 10 degrees from back to front; The gear structure is configured as an internal gear ring, the base is provided with a central gear, a plurality of planetary gears are provided between the internal gear ring and the central gear, the third gear is configured as one of the planetary gears, and the internal gear ring, the central gear, and the plurality of planetary gears cooperate to form a planetary gear system.

7. The reversible direction ride automotive seat of claim 1, wherein, The base is provided with a drive motor, the output shaft of the drive motor is configured as the rotating shaft, and the drive motor can drive the first gear and the third gear to rotate synchronously; The drive motor can drive the car seat to switch between the forward mode and the reverse mode.

8. The reversible direction ride automotive seat of claim 1, wherein, The base is provided with a first buckle near the rear end of the seat cushion and a second buckle near the front end of the seat cushion; When the car seat switches from the forward mode to the reverse mode, the locking structure is disengaged from the first buckle and locked in the vertical direction to the second buckle; When the car seat switches from the reverse mode to the forward mode, the locking structure is disengaged from the second buckle and locked in the vertical direction to the first buckle.

9. The reversible direction ride automotive seat of claim 1, wherein, The plurality of synchronous rods include first and second synchronous rods arranged in parallel, one end of each of the first and second synchronous rods is rotatably connected to the first connecting rod, and the other end of each of the first and second synchronous rods is rotatably connected to the third connecting rod.

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