Automobile seat capable of being seated in reverse direction

Abstract

The invention relates to the technical field of automobile seats, and discloses an automobile seat capable of being taken in a reverse direction, the automobile seat has a forward mode for a passenger to take in a forward direction and a reverse mode for the passenger to take in a reverse direction, the automobile seat comprises a base, a first gear, a second gear, a first rotating shaft, a second rotating shaft and a third rotating shaft, the base is provided with the first gear and the second gear, and the second gear is meshed with the first gear; a first connecting rod and a second connecting rod are arranged on the first gear and the second gear respectively; the seat cushion is provided with a seat cushion bracket; the backrest is movably arranged on the base, and when the automobile seat is in a forward mode, the backrest is located at the rear end of the cushion; when the automobile seat is switched from the forward mode to the reverse mode, the backrest is lifted upwards from the rear end of the cushion, passes through the upper portion of the cushion and is switched to the front end of the cushion; a backrest bracket is arranged on the backrest; and the locking structure can lock the backrest. The system has the advantages that the overall structure is simple, the cost is low, the needed space is small when the modes are switched, and it can be effectively guaranteed that forward and reverse riding comfort of passengers is high.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, in particular to an automobile seat capable of being sat in a reversible direction. Background Art

[0002] Reversible car seats are widely used in MPV models. Among them, the reverse sitting of the first row of car seats can enhance the interaction between passengers; the reverse sitting of the second row of car seats can facilitate passengers to conduct business activities and provide private space; the reverse sitting of the third row of car seats can facilitate users to fish and camp.

[0003] In the existing reversible car seats, there are two ways to change the sitting direction of the car seat: rotating the seat and tipping the seat, among which, changing the sitting direction by rotating the seat requires a large layout space, and the seat rotation process requires X- and Y-direction clearances, and the mechanism layout requires sufficient Z-direction height. By tipping the seat to change the sitting direction, the backrest and the seat cushion are interchanged, there is a height difference between the backrest and the seat cushion, the leg rest part is too long, and the backrest part is too short, resulting in poor comfort for passengers when sitting in reverse, and the tipping action also requires space in the car, which is only suitable for the rear trunk. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a reversible car seat which has high riding comfort for passengers and requires little space.

[0005] The technical solution adopted by the present invention to solve the technical problem is to provide a reversible car seat, which has a forward mode for passengers to sit forward and a reverse mode for passengers to sit reversely, and can be switched between the forward mode and the reverse mode. The car seat comprises: A base, wherein a first gear and a second gear are respectively disposed on the base, wherein the first gear is rotatably disposed on the base via a rotating shaft, and a third gear is disposed on the rotating shaft, wherein the third gear rotates synchronously with the first gear, and the second gear meshes with the first gear; and a first connecting rod and a second connecting rod are respectively disposed on the first gear and the second gear; A seat cushion, movably arranged on the base, the seat cushion is provided with a seat cushion bracket, the seat cushion bracket is provided with a gear structure, and the gear structure is meshed with the third gear; a backrest, movably arranged on the base, wherein when the car seat is in the forward mode, the backrest is located at the rear end of the seat 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 seat cushion, passes over the seat cushion, and is switched to the front end of the seat cushion; The backrest is provided 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 synchronization rods are provided between the third connecting rod and the backrest bracket, and the third connecting rod is rotatably connected to the second connecting rod and the backrest bracket respectively; A locking structure is arranged on the backrest bracket, and when the car seat is switched to the forward mode or the reverse mode, the locking structure can lock the backrest.

[0006] Furthermore, a five-link mechanism is formed among the base, the first link, the backrest bracket, the third link and the second link.

[0007] Furthermore, the backrest bracket is provided with a first long groove, and the third connecting rod is provided with a second long groove; One end of the first connecting rod away from the first gear is slidably arranged in the first long slot, and a first tensioning spring is arranged between the first connecting rod and the backrest bracket, and the elastic force of the first tensioning spring acts on the first connecting rod to make the end of the first connecting rod away from the first gear maintain a tendency to move toward 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 groove, and a second tensioning spring is arranged between the second connecting rod and the third connecting rod. The elastic force of the second tensioning spring acts on the second connecting rod, so that the end of the second connecting rod away from the second gear maintains a tendency to move toward the end of the second long groove close to the second gear.

[0008] Further, when the car seat is switched from the forward mode to the reverse mode, or from the reverse mode to the forward mode: The first gear rotates to rotate the first connecting rod, and at the same time, the second connecting rod rotates through the second gear; the end of the first connecting rod away from the first gear slides upward in the first long groove and compresses the first tensioning spring; the end of the second connecting rod away from the second gear slides in the second long groove toward the end away from the second gear and compresses the second tensioning spring, so as to reduce the height to which the backrest needs to be lifted.

[0009] Furthermore, the first connecting rod has a first sliding bolt at one end away from the first gear, and the first sliding bolt abuts against the first tensioning spring; A second sliding bolt is disposed at one end of the second connecting rod away from the second gear, and the second sliding bolt abuts against the second tensioning spring.

[0010] Furthermore, the number of teeth of the first gear is twice that of the second gear, and the rotation speed of the second gear during transmission is twice that of the first gear; The number of teeth of the gear tooth structure is 9 times the number of teeth of the third gear, and the rotation speed of the gear tooth structure during transmission is 9 times the rotation speed of the third gear; When the car seat is switched 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.

[0011] Further, when the car seat is in the forward mode, the seat cushion is tilted downward by 10 degrees from front to back; when the car seat is in the reverse mode, the seat cushion is tilted downward by 10 degrees from back to front; The gear tooth structure is configured as an inner ring gear, a central gear is provided on the base, a plurality of planetary gears meshing with the central gear and the inner gear are provided between the central gear and the inner gear, the third gear is configured as one of the planetary gears, and the inner ring gear, the central gear and the plurality of planetary gears cooperate to form a planetary gear system.

[0012] Furthermore, a driving motor is provided on the base, an output shaft of the driving motor is configured as the shaft, and the driving motor can drive the first gear and the third gear to rotate synchronously; The drive motor may drive the vehicle seat to switch between the forward mode and the reverse mode.

[0013] 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; When the car seat switches from the forward mode to the reverse mode, the locking structure disengages from the first buckle and is locked to the second buckle in a vertical direction; when the car seat switches from the reverse mode to the forward mode, the locking structure disengages from the second buckle and is locked to the first buckle in a vertical direction.

[0014] Furthermore, the plurality of synchronization rods include a first synchronization rod and a second synchronization rod which are arranged in parallel, one end of the first synchronization rod and the second synchronization rod are both rotatably connected to the first connecting rod, and the other ends of the first synchronization rod and the second synchronization rod are both rotatably connected to the third connecting rod.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the present invention, the car seat has an adjustable forward mode and a reverse mode, which can be respectively suitable for passengers to ride forward and reverse. In actual use, when the car is in the forward mode, the backrest is near the rear end of the seat cushion, the rotating shaft drives the first gear to rotate, the third gear and the first gear rotate synchronously, and the first gear meshes with the second gear; and 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 connecting rod and the third connecting rod are provided with a plurality of synchronous rods to ensure that the first connecting rod and the third connecting rod always move in parallel, the first connecting rod and the third connecting rod lift the backrest bracket, that is, lift the backrest, and as the rotating shaft continues to rotate, the backrest is lifted upward from the rear end of the seat cushion, passes above the seat cushion, and moves to the front end of the seat cushion until the locking structure is locked to the lock buckle near the front end of the seat cushion, and the car seat switches to the reverse mode. In this process, the backrest moves from the rear end of the seat cushion to the front end, and the seat cushion moves from a rearward tilt of about 10 degrees to a forward tilt of about 10 degrees. On the contrary, the car seat can also be switched from reverse mode to forward mode. This solution realizes the multi-scenario use of car seats, and is applicable to the front, middle and rear seats. The overall implementation structure is simple, which simplifies the existing structure and reduces costs. It can also be adjusted manually or electrically, ensuring that passengers are comfortable both when riding in the forward and reverse directions. When the locking structure of the car seat in the forward and reverse modes is locked, it is locked vertically, which meets the requirements of the lock layout and the force stripping direction of the floor lock, ensuring reliable locking.

[0016] In the present invention, a first long groove is provided on the backrest bracket, and one end of the first connecting rod is slidably arranged in the first long groove; a second long groove is provided on the third connecting rod, and one end of the second connecting rod is slidably arranged in the second long groove. When the car seat is switched between forward and reverse directions, when the backrest is lifted up, the end of the first connecting rod moves toward the upper end of the first long groove and compresses the first tensioning spring, and the end of the second connecting rod moves toward the rear end of the second long groove and compresses the second tensioning spring, so that the distance that the backrest is lifted upward is effectively reduced, and the switching can be completed without occupying a large space in the Z direction. In addition, when a collision occurs, the first long groove, the second long groove, the first tensioning spring and the second tensioning spring have a buffering effect, which can reduce the stress of the mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the automobile seat of the present invention in the forward mode; Figure 2 for Figure 1 Schematic diagram of the plane; Figure 3 It is a plan view of a car seat switched to a reverse mode; Figure 4 for Figure 1Schematic diagram of the structure of a car seat with one side retained (backrest removed); Figure 5 for Figure 4 A schematic diagram of the structure from another perspective; Figure 6 for Figure 4 Structural diagram of the middle part structure; Figure 7 for Figure 6 A schematic diagram of the structure from another perspective.

[0018] In the figure: 1. Base; 10. Driving 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 long groove; 15. First tensioning spring; 16. Second tensioning spring; 17A. First synchronization rod; 17B. Second synchronization rod; 18. First buckle; 19. Second buckle; 2. Seat cushion; 20. Seat cushion bracket; 201. Gear structure; 21. Central gear; 22. Planetary gear; 3. backrest; 30. backrest bracket; 301. first long groove; 4. Locking structure. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] 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 position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] like Figure 1-Figure 5 As shown, a reversible car seat has a forward mode for passengers to sit forward, and a reverse mode for passengers to sit reversely, and it can switch between the forward mode and the reverse mode. When in the forward mode, the backrest 3 is at the rear end of the seat cushion, and the passenger faces forward when sitting on the car seat. When in the reverse mode, the backrest 3 is at the front end of the seat cushion 2, and the passenger faces backward when sitting on the car seat.

[0025] The automobile seat of this embodiment mainly includes: a base 1, a seat cushion 2, a backrest 3, a locking structure 4 arranged on the backrest 3, and a gear and connecting rod transmission mechanism arranged among the base 1, the seat cushion 2 and the backrest 3.

[0026] The base 1 is an integral support structure of the car seat, which includes two parts symmetrically arranged on the left and right sides to ensure that the car seat is reliably supported as a whole. When in use, the base 1 is fixed on the vehicle body floor. The base 1 is provided with a first gear 11 and a second gear 12, respectively. The first gear 11 is rotatably arranged on the base 1 through a rotating shaft 100, and a third gear 13 is arranged on the rotating shaft 100. The third gear 13 is coaxially arranged with the first gear 11, and the third gear 13 rotates synchronously with the first gear 11 and is driven by the same rotating shaft 100. The second gear 12 is meshed with the first gear 11, and the first gear 11 and the second gear 12 are respectively provided with a first connecting rod 110 and a second connecting rod 120, specifically, the first connecting rod 110 and the first gear 11 are welded as one, and the second connecting rod 120 and the second gear 12 are welded as one. Two support plates arranged at intervals are provided on the left and right sides of the base 1, and the first gear 11 and the second gear 12 are rotatably arranged between the two support plates. When the rotating shaft 100 rotates, the rotating shaft 100 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.

[0027] The seat cushion 2 is movably arranged on the base 1, and the seat cushion 2 can be rotated and adjusted on the base 1. A seat cushion bracket 20 is arranged on the seat cushion 2, and the seat cushion bracket 20 is fixedly connected to the main part of the seat cushion 2. A gear structure 201 is arranged on the seat cushion bracket 20. Specifically, the gear structure 201 is arranged as an inner gear ring, and the gear structure 201 is meshed with the third gear 13. In actual use, the rotating shaft 100 drives the third gear 13, and the third gear 13 meshes with the transmission gear structure 201, and the gear structure 201 drives the seat cushion bracket 20 to rotate, that is, the seat cushion 2 is rotated and adjusted.

[0028] The backrest 3 is movably arranged on the base 1. When the car seat is in the forward mode, the backrest 3 is at the rear end of the cushion 2. When the car seat is switched from the forward mode to the reverse mode, the backrest 3 is lifted upward from the rear end of the cushion 2, passes over the cushion 2, and is switched to the front end of the cushion 2. That is, during the switching process between the forward mode and the reverse mode of the car seat, after the backrest 3 is lifted, it moves at the rear end and the front end of the cushion 2. Specifically, in the forward mode, the backrest 3 is at the rear end of the cushion 2, and when the passenger sits on the car seat, the front side of the backrest 3 can be used for the passenger's back to lean on. After switching to the reverse mode, the backrest 3 is at the front end of the cushion 2, and when the passenger sits on the car seat, the other side (i.e., the reverse side) of the backrest 3 can be used for the passenger's back to lean on. There is no need to reverse the backrest 3 to the cushion 2, and the cushion 2 is reversed to the backrest 3, thereby effectively ensuring the comfort of the passenger whether sitting in the forward mode or the reverse mode. The seat cushion 2 movement and the shoulder adjustment mechanism can also be linked to provide a comfortable riding experience for both forward and reverse riding.

[0029] More specifically, a backrest bracket 30 is disposed on the backrest 3, and the backrest bracket 30 is fixedly connected to the backrest 3. The first connecting rod 110 is rotatably connected to the backrest bracket 30, and 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 in parallel, and a plurality of synchronization rods are provided between the two, wherein the plurality of synchronization rods include a first synchronization rod 17A and a second synchronization rod 17B arranged in parallel, one end of the first synchronization rod 17A and the second synchronization rod 17B are rotatably connected to the first connecting rod 110, and the other ends of the first synchronization rod 17A and the second synchronization rod 17B are rotatably connected to the third connecting rod 14. The arrangement of the synchronization rods can ensure that the first connecting rod 110 and the third connecting rod 14 are always parallel during the movement. The third connecting rod 14 is rotatably connected to the second connecting rod 120 and the backrest bracket 30, respectively. Specifically, a five-bar mechanism 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 a five-bar mechanism on each of the left and right sides of the car seat, ensuring that the backrest 3 and the seat cushion 2 are subjected to balanced forces on the left and right during movement and that no unilateral deflection occurs.

[0030] The locking structure 4 is arranged on the backrest bracket 30. When the car seat is switched to the forward mode or the reverse mode, the locking structure 4 can lock the backrest 3. Specifically, a first buckle 18 is provided on the left and right sides of the rear end near the cushion 2 on the base 1, and a second buckle 19 is provided on the left and right sides of the front end near the cushion 2. The first buckle 18 and the second buckle 19 have the same structure, ensuring that the locking structure 4 on both sides of the bottom of the backrest 3 can be locked on the two buckles when the car seat is in the forward mode or the reverse mode, ensuring reliable locking, thereby ensuring the structural stability of the car seat. In actual use, when the car seat is switched from the forward mode to the reverse mode, the locking structure 4 is disengaged from the first buckle 18 and locked to the second buckle 19 in the vertical direction. When the car seat is switched from the reverse mode to the forward mode, the locking structure 4 is disengaged from the second buckle 19 and locked to the first buckle 18 in the vertical direction. When the locking structure 4 of the automobile seat is locked in the forward mode and the reverse mode, it is locked vertically, which meets the lock arrangement requirements and the force stripping direction of the floor lock, thereby ensuring reliable locking.

[0031] The car seat of this embodiment can switch between the two modes either manually or electrically. When it is manually implemented, there is no need to set the drive motor 10. After unlocking the locking structure 4, the user can directly push the backrest 3 to switch between the two modes. When it is implemented electrically, it is necessary to configure the drive motor 10 on the base 1. Specifically, the drive motor 10 is set on the base 1, and the output shaft 100 of the drive motor 10 is configured as a shaft 100. The drive motor 10 can drive the first gear 11 and the third gear 13 to rotate synchronously. In this way, the drive motor 10 can drive the car seat to switch between the forward mode and the reverse mode.

[0032] Preferably, if Figure 2-Figure 7 As shown, the backrest bracket 30 is provided with a first long slot 301, and the third connecting rod 14 is provided with a second long slot 140. The end of the first connecting rod 110 away from the first gear 11 is slidably arranged in the first long slot 301, and a first tensioning spring 15 is arranged between the first connecting rod 110 and the backrest bracket 30. The first tensioning spring 15 is in the first long slot 301. The elastic force of the first tensioning spring 15 acts on the first connecting rod 110, so that the end of the first connecting rod 110 away from the first gear 11 maintains a tendency to move toward the lower end of the first long slot 301. One end of the second connecting rod 120 away from the second gear 12 is slidably arranged in the second long groove 140, and a second tensioning spring 16 is provided between the second connecting rod 120 and the third connecting rod 14. The second tensioning spring 16 is in the second long groove 140. The elastic force of the second tensioning 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 toward the end of the second long groove 140 close to the second gear 12.

[0033] 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 11 rotates to rotate the first connecting rod 110, and at the same time, the second connecting rod 120 rotates through the second gear 12; the end of the first connecting rod 110 away from the first gear 11 slides upward in the first long groove 301, and compresses the first tensioning spring 15; the end of the second connecting rod 120 away from the second gear 12 slides in the second long groove 140 toward the end away from the second gear 12, and compresses the second tensioning spring 16, so as to reduce the height that the backrest 3 needs to be lifted. That is, the above structural setting can greatly save the Z-direction space in the car, and the forward and reverse switching of the car seat can be realized in a very small space.

[0034] More specifically, the first connecting rod 110 has a first sliding bolt 110A at one end away from the first gear 11, 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 second connecting rod 120 has a second sliding bolt 120A at one end away from the second gear 12, 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.

[0035] In actual use, the present embodiment has a first long slot 301 on the backrest bracket 30, and one end of the first connecting rod 110 is slidably disposed in the first long slot 301; the third connecting rod 14 has a second long slot 140, and one end of the second connecting rod 120 is slidably disposed in the second long slot 140. When the car seat is switched between forward and reverse directions, when the backrest 3 is lifted up, the end of the first connecting rod 110 moves toward the upper end of the first long slot 301 and compresses the first tensioning spring 15, and the end of the second connecting rod 120 moves toward the rear end of the second long slot 140 and compresses the second tensioning spring 16, so that the distance that the backrest 3 is lifted upward is effectively reduced, and the switching can be completed without occupying a large space in the Z direction. In addition, when a collision occurs, the first long slot 301, the second long slot 140, the first tensioning spring 15 and the second tensioning spring 16 are provided with a compressible area, which has a buffering effect, can reduce the force of the mechanism, and the force is concentrated on the floor lock.

[0036] As an optimal implementation of this embodiment: the number of teeth of the first gear 11 of this embodiment is twice that of the second gear 12, so the rotation speed of the second gear 12 during transmission is twice that of the first gear 11. The number of teeth of the gear structure 201 is 9 times that of the third gear 13, so the rotation speed of the gear structure 201 during transmission is 9 times that of the third gear 13. When the car seat is switched from the forward mode to the reverse mode, or from the reverse mode to the forward 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 the original position, that is, the second connecting rod 120 rotates 360 degrees, and the gear structure 201 rotates 20 degrees, that is, the seat cushion bracket 20 and the seat cushion 2 rotate 20 degrees. It should be explained that when the car seat is in the forward mode, the seat cushion 2 tilts downward by 10 degrees from front to back; when the car seat is in the reverse mode, the seat cushion 2 tilts downward by 10 degrees from back to front, so the gear structure 201 rotates a total of 20 degrees.

[0037] Preferably, the gear tooth structure 201 of this embodiment is configured as an inner ring gear, a central gear 21 is provided on the base 1, a plurality of planetary gears 22 meshing with the central gear 21 and the inner gear are provided between the central gear 21 and the inner gear, the third gear 13 is configured as one of the planetary gears 22, and the inner ring gear, the central gear 21 and the plurality of planetary gears 22 cooperate to form a planetary gear 22 system, and the planetary gear 22 system ensures smooth movement.

[0038] In this embodiment, the car seat has a forward mode and a reverse mode that are adjustable, and can be respectively suitable for passengers to ride forward and reverse. In actual use, when the car is in the forward mode, the backrest 3 is located near the rear end of the seat cushion 2, the rotating shaft 100 drives the first gear 11 to rotate, the third gear 13 and the first gear 11 rotate synchronously, and the first gear 11 meshes with the second gear 12; and 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 0 and the third connecting rod 14 are provided with a plurality of synchronous rods to ensure that the first connecting rod 110 and the third connecting rod 14 always move in parallel. The first connecting rod 110 and the third connecting rod 14 lift the backrest bracket 30, that is, lift the backrest 3. As the rotating shaft 100 continues to rotate, the backrest 3 is lifted upward from the rear end of the seat cushion 2, passes above the seat cushion 2, and moves to the front end of the seat cushion 2 until the locking structure 4 is locked with the lock buckle near the front end of the seat cushion 2. The car seat switches to the reverse mode. In 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 about 10 degrees of backward tilt to about 10 degrees of forward tilt. On the contrary, the car seat can also be switched from the reverse mode to the forward mode. This solution realizes the multi-scenario use of the car seat, and is applicable to the front row, middle row and rear row seats. The overall implementation structure is simple, simplifies the existing structure, reduces the manufacturing cost, and can realize both manual adjustment and electric adjustment, which can ensure that the comfort of passengers when riding forward and reverse is high.

Claims

1. A reversible car seat, which has a forward mode for passengers to sit forward, and a reverse mode for passengers to sit reversely, and can be switched between the forward mode and the reverse mode, characterized in that: The car seat comprises: A base, wherein a first gear and a second gear are respectively disposed on the base, wherein the first gear is rotatably disposed on the base via a rotating shaft, and a third gear is disposed on the rotating shaft, wherein the third gear rotates synchronously with the first gear, and the second gear meshes with the first gear; and a first connecting rod and a second connecting rod are respectively disposed on the first gear and the second gear; A seat cushion, movably arranged on the base, the seat cushion is provided with a seat cushion bracket, the seat cushion bracket is provided with a gear structure, and the gear structure is meshed with the third gear; a backrest, movably arranged on the base, wherein when the car seat is in the forward mode, the backrest is located at the rear end of the seat 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 seat cushion, passes over the seat cushion, and is switched to the front end of the seat cushion; The backrest is provided 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 synchronization rods are provided between the third connecting rod and the backrest bracket, and the third connecting rod is rotatably connected to the second connecting rod and the backrest bracket respectively; A locking structure is arranged on the backrest bracket, and when the car seat is switched to the forward mode or the reverse mode, the locking structure can lock the backrest.

2. The reversible car seat according to claim 1, characterized in that: A five-link mechanism is formed between the base, the first link, the backrest bracket, the third link and the second link.

3. The reversible car seat according to claim 1, characterized in that: The backrest bracket is provided with a first long groove, and the third connecting rod is provided with a second long groove; One end of the first connecting rod away from the first gear is slidably arranged in the first long slot, and a first tensioning spring is arranged between the first connecting rod and the backrest bracket, and the elastic force of the first tensioning spring acts on the first connecting rod to make the end of the first connecting rod away from the first gear maintain a tendency to move toward 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 groove, and a second tensioning spring is arranged between the second connecting rod and the third connecting rod. The elastic force of the second tensioning spring acts on the second connecting rod, so that the end of the second connecting rod away from the second gear maintains a tendency to move toward the end of the second long groove close to the second gear.

4. The reversible car seat according to claim 3, characterized in that: When the car seat is switched from the forward mode to the reverse mode, or from the reverse mode to the forward mode: The first gear rotates to rotate the first connecting rod, and at the same time, the second connecting rod rotates through the second gear; the end of the first connecting rod away from the first gear slides upward in the first long groove and compresses the first tensioning spring; the end of the second connecting rod away from the second gear slides in the second long groove toward the end away from the second gear and compresses the second tensioning spring, so as to reduce the height to which the backrest needs to be lifted.

5. The reversible car seat according to claim 3 or 4, characterized in that: A first sliding bolt is provided at one end of the first connecting rod away from the first gear, and the first sliding bolt abuts against the first tensioning spring; A second sliding bolt is disposed at one end of the second connecting rod away from the second gear, and the second sliding bolt abuts against the second tensioning spring.

6. The reversible car seat according to claim 1, characterized in that: The number of teeth of the first gear is twice that of the second gear, and the speed of the second gear during transmission is twice that of the first gear; The number of teeth of the gear tooth structure is 9 times the number of teeth of the third gear, and the rotation speed of the gear tooth structure during transmission is 9 times the rotation speed of the third gear; When the car seat is switched 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.

7. The reversible vehicle seat according to claim 6, characterized in that: When the car seat is in the forward mode, the seat cushion is tilted downward by 10 degrees from front to back; when the car seat is in the reverse mode, the seat cushion is tilted downward by 10 degrees from back to front; The gear tooth structure is configured as an inner ring gear, a central gear is provided on the base, a plurality of planetary gears meshing with the central gear and the inner gear are provided between the central gear and the inner gear, the third gear is configured as one of the planetary gears, and the inner ring gear, the central gear and the plurality of planetary gears cooperate to form a planetary gear system.

8. The reversible vehicle seat according to claim 1, characterized in that: A driving motor is disposed on the base, and an output shaft of the driving motor is configured as the shaft, and the driving motor can drive the first gear and the third gear to rotate synchronously; The drive motor may drive the vehicle seat to switch between the forward mode and the reverse mode.

9. The reversible vehicle seat according to claim 1, characterized in that: 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; When the car seat switches from the forward mode to the reverse mode, the locking structure disengages from the first buckle and locks to the second buckle in a vertical direction; When the car seat is switched from the reverse mode to the forward mode, the locking structure is disengaged from the second buckle and is locked to the first buckle in a vertical direction.

10. The reversible vehicle seat according to claim 1, characterized in that: The plurality of synchronization rods include a first synchronization rod and a second synchronization rod which are arranged in parallel. One end of the first synchronization rod and the second synchronization rod are both rotatably connected to the first connecting rod, and the other ends of the first synchronization rod and the second synchronization rod are both rotatably connected to the third connecting rod.

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