A seat with a foldable cushion

Abstract

The utility model relates to the field of automobile seat, concretely relates to a seat with foldable cushion, including backrest, support seat, cushion and lock unit, and the fixed cushion folding frame is established on the cushion, still include fixed shaft, and the fixed shaft passes through the cushion folding frame and support seat, and the cushion folding frame and fixed shaft rotate and connect, the lock unit includes first toothed plate spare, second toothed plate spare, poking spare, first toothed plate spare and fixed shaft rotate and connect, and first toothed plate spare and cushion folding frame fixed connection, first toothed plate spare is equipped with first pawl and third pawl, and second toothed plate spare is equipped with second pawl, first pawl and second pawl engage when the cushion folding frame is in the state of upward folding, third pawl and second pawl engage when the cushion folding frame is in the state of lying, and the poking spare is connected with the tension spring, and the poking spare is abutted with second toothed plate spare under the action of tension spring, through the scheme, the same lock unit can lock the two states of cushion.

Description

Technical Field

[0001] This utility model relates to the field of automotive seats, specifically to a seat with a foldable cushion. Background Technology

[0002] Whether it's a single seat or a multi-person seat, current seat cushions have a folding function. When the seat is not in use, the cushion can be folded up, making it easy to store the seat and improving the utilization of interior space. For example, a convenient folding rear car seat is disclosed in the Chinese utility model patent with authorization announcement number CN219584007.

[0003] Because the seat cushion can rotate, a locking unit needs to be installed on the seat to lock the cushion. However, the current locking unit usually has a locking state, that is, when the seat cushion is folded up, the locking unit locks the seat cushion to prevent the seat cushion from falling back. However, when the seat cushion is in the flat use state, the seat cushion is not in the locking state. In this case, the seat cushion may not be in a stable flat state. The seat cushion may automatically fold up or swing up due to external forces or vibrations from the car driving.

[0004] In order to enable the seat cushion to have two locking states, the existing technology sets up two locking units to lock the seat cushion in different states respectively. However, setting up two locking units is complex in structure, inconvenient to install, not conducive to reducing parts costs, and also inconvenient to use and operate. Utility Model Content

[0005] The present invention aims to provide a seat with a foldable cushion, so that the two states of the cushion can be locked by the same locking unit.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a seat with a foldable cushion, comprising a backrest, a support seat, a cushion and a locking unit, wherein a cushion folding frame is fixedly provided on the cushion, and a fixing shaft is also included, wherein the fixing shaft passes through the cushion folding frame and the support seat, and the cushion folding frame and the fixing shaft are rotatably connected.

[0007] The locking unit includes a first toothed plate, a second toothed plate, and a toggle member; the first toothed plate is rotatably connected to a fixed shaft and fixedly connected to a seat cushion folding frame; the first toothed plate is provided with a first locking tooth and a third locking tooth, and the second toothed plate is provided with a second locking tooth; when the seat cushion folding frame is in the upward folding state, the first locking tooth and the second locking tooth engage; when the seat cushion folding frame is in the flat state, the third locking tooth and the second locking tooth engage.

[0008] The second toothed plate is located between the first toothed plate and the actuating member. The actuating member is connected to a tension spring, and the actuating member abuts against the second toothed plate under the action of the tension spring.

[0009] The principle and advantages of this solution are as follows: In this application, the seat cushion folding frame and the seat cushion are fixedly connected, and the support base is used to support the entire seat. The fixed shaft passes through the seat cushion folding frame and the support base, realizing the assembly of the seat cushion folding frame and the support base. At the same time, the seat cushion folding frame and the fixed shaft are rotatably connected, so that the seat cushion folding frame can fold and rotate around the fixed shaft, thereby realizing the folding of the seat cushion.

[0010] The first toothed plate is fixedly connected to the seat cushion folding frame, and rotatably connected to the fixed shaft. This allows the first toothed plate to rotate on the fixed shaft as the seat cushion folding frame folds upwards. Once the seat cushion folding frame is fully folded upwards, the first and second locking teeth engage, locking the first toothed plate in place. The first toothed plate cannot rotate, and neither can the seat cushion folding frame, thus achieving a locked position after the seat cushion folds upwards. Simultaneously, the actuating element, under the action of a tension spring, abuts against the second toothed plate, ensuring a tight engagement between them and preventing separation, thus guaranteeing the stability of the engagement.

[0011] When unlocking is required, the actuating element rotates against the tension of the spring, and the actuating element no longer presses against the second toothed plate. The second toothed plate and the first toothed plate become loose, and the first and second locking teeth separate, thereby unlocking. The first toothed plate can then rotate, allowing the seat cushion folding frame to fall downwards.

[0012] When the seat cushion falls from its flipped-up position back to its horizontal position, the actuating element presses against the second toothed plate under the tension of the spring. The second toothed plate then presses against the first toothed plate, and the third and second locking teeth engage, thus locking the seat cushion in a more stable horizontal position and preventing it from easily flipping upwards.

[0013] Therefore, the locking unit of this application has two locking states, realizing the locking of the seat cushion in both the folded-up and flat-lying states, and ensuring the seat cushion remains stable and stationary in both states. Unlocking in both states can be achieved by operating the same locking unit, eliminating the need for two separate locking units. This results in a simple structure, easy installation, reduced component costs, and ease of use.

[0014] Preferably, as an improvement, the support base is equipped with a cushioning block for buffering the descent of the seat cushion. Thus, when the seat cushion is lowered, the cushioning block can cushion the impact between the seat cushion and the support base, reducing the impact. The cushioning block can be made of rubber.

[0015] Preferably, as an improvement, a hydraulic rod is connected between the support base and the seat cushion. One end of the hydraulic rod is rotatably connected to the seat cushion, and the other end is rotatably connected to the support base. Thus, when folding the seat cushion upwards, the hydraulic rod provides assistance, making the upward folding of the seat cushion easier.

[0016] Preferably, as an improvement, the number of support bases is three, and the number of seat cushions is two, one of which is a single seat cushion and the other is a multi-person seat cushion; the hydraulic rod is connected to at least the multi-person seat cushion. Since the multi-person seat cushion is large in volume and heavy, the hydraulic rod is primarily used to assist in the upward folding of the multi-person seat cushion.

[0017] Preferably, as an improvement, the locking unit further includes a stabilizing element, which includes a first stabilizing element and a second stabilizing element. The first stabilizing element and the second stabilizing element are fixedly connected, and the first toothed plate, the second toothed plate, and the actuating element are all located between the first stabilizing element and the second stabilizing element.

[0018] Therefore, the first and second stabilizing components clamp the first toothed plate, the second toothed plate, and the actuating component, so that the first toothed plate, the second toothed plate, and the actuating component can be stably positioned between the first and second stabilizing components. The first and second stabilizing components have the functions of lateral limiting, stabilizing, and supporting the first toothed plate, the second toothed plate, and the actuating component. The first toothed plate, the second toothed plate, and the actuating component have a compact structure and are not easy to separate.

[0019] Preferably, as an improvement, the fixed shaft passes through the first stabilizer and the second stabilizer.

[0020] Therefore, the first and second stabilizers are also connected to the fixed shaft. The fixed shaft has a connecting and fixing function for the first and second stabilizers. In this way, the first stabilizer, the second stabilizer, the seat folding frame, the support base, and the first toothed plate are all connected to the same fixed shaft. The fixed shaft has a connecting function for the first stabilizer, the second stabilizer, the seat folding frame, the support base, and the first toothed plate. The structure is compact and reasonable.

[0021] Preferably, as an improvement, a rotating sleeve is provided on the fixed shaft, and multiple annular assembly grooves are provided on the side wall of the rotating sleeve.

[0022] The seat folding frame, the first stabilizer, and the second stabilizer are respectively assembled in the assembly slot of the rotating sleeve. The assembly slot serves to limit the position of the seat folding frame, the first stabilizer, and the second stabilizer, preventing the seat folding frame and the first stabilizer from being tightly fitted together, and preventing the first toothed plate from being tightly fitted together with the two stabilizers. This helps to reduce friction between the seat folding frame and the first toothed plate and other parts when they rotate.

[0023] Preferably, as an improvement, one of the assembly slots has only one inner sidewall and is located at the end of the rotating sleeve. Thus, the assembly slot has only one inner sidewall, facilitating the passage of the rotating sleeve through the seat cushion folding frame, thereby enabling the assembly of the seat cushion folding frame and the rotating sleeve.

[0024] Preferably, as an improvement, the fixed axis is a stepped axis.

[0025] Preferably, as an improvement, the stepped shaft is divided into three sections, with the rotating sleeve fitted onto the middle section.

[0026] Preferably, as an improvement, the backrest and support seat are rotatably connected. This allows the backrest to also fold down, thus enabling the chair to have more different usage configurations by folding either the backrest or the seat cushion. Attached Figure Description

[0027] Figure 1 , Figure 10 This is a 3D model of a car seat.

[0028] Figure 2 This is a perspective view of the folding seat cushion locking structure in a car seat.

[0029] Figure 3 for Figure 2 Another perspective stereoscopic view.

[0030] Figure 4 This is a 3D view of the folding seat cushion locking structure, which more clearly illustrates the structure of the locking unit.

[0031] Figure 5 This is a three-dimensional schematic diagram of the locking unit.

[0032] Figures 6-7 This is an exploded schematic diagram of the locking structure of a folding seat cushion.

[0033] Figure 8 A schematic diagram of a rotating sleeve mounted on a fixed shaft.

[0034] Figure 9 for Figure 8 An explosion diagram.

[0035] Figure 11 This is a stereoscopic view of a car seat from another perspective.

[0036] Figure 12 for Figure 11 Enlarged view of the hydraulic rod and other structures. Detailed Implementation

[0037] The following detailed description illustrates the specific implementation method:

[0038] The reference numerals in the accompanying drawings include: 1. First seat cushion; 2. First backrest; 3. Backrest frame; 4. First support base; 5. Seat cushion folding frame; 6. Fixing bolt; 7. Fixing shaft; 8. Strap; 9. Second stabilizer; 10. Drive handle; 11. Drive shaft; 12. Tension spring; 13. First toothed plate; 14. First locking tooth; 15. Third locking tooth; 16. Second toothed plate; 17. Actuating element; 18. Hook; 19. First stabilizer; 20. Rivet; 21. Fixing hole; 22. Second locking tooth; 22. Shaft. 23. First through hole; 24. Second through hole; 25. Third through hole; 27. Fourth through hole; 28. Rotating sleeve; 29. ​​Second backrest; 30. Second seat cushion; 31. Second support base; 32. Third support base; 33. Buffer block; 34. Hydraulic rod; 35. Second rotating end; 36. First bracket; 37. First rotating end; 38. Second bracket; 39. Third assembly groove; 40. Second assembly groove; 41. Outer circumferential surface; 42. First assembly groove; 43. First section; 44. Second section; 45.

[0039] Example 1

[0040] The basics are as follows: Figures 1-10 As shown: A foldable seat includes a support base (in this embodiment, there are three support bases: a first support base 4, a second support base 32, and a third support base 33, with the second support base 32 located between the first support base 4 and the third support base 33), a seat cushion (which is a frame structure; in this embodiment, there are two seat cushions: a first seat cushion 1 and a second seat cushion 31, with the first seat cushion 1 located between the first support base 4 and the second support base 32, and the second seat cushion 31 located between the second support base 32 and the third support base 33), and a backrest (which is a frame structure; in this embodiment, there are two backrests: a first backrest 2 and a second backrest 30, with the first backrest 2 located between the first support base 4 and the second support base 32, and the second backrest 30 located between the second support base 32 and the third support base 33). In this embodiment, the first seat cushion 1 is rotatably disposed between the first support base 4 and the second support base 32, and the second seat cushion 31 is rotatably disposed between the second support base 32 and the third support base 33. The support base is used to support the seat cushion and backrest, thereby supporting the entire seat. The seat cushion can rotate on the support base, allowing it to be folded over, and the backrest is fixed to the support base.

[0041] The rotation of the first cushion 1 and the second cushion 31 onto the second support 32 is relatively simple, achieved through a shaft-hole fit, and is not particularly special; therefore, it will not be described in detail in this embodiment. However, the rotation of the first cushion 1 and the first support 4, and the second cushion 31 and the third support 33, is more complex. Furthermore, the first support 4 and the third support 33 are equipped with locking units to lock the first cushion 1 and the second cushion 31, respectively. Therefore, this embodiment will describe the locking units and their surrounding structures in detail. Since the locking units on the first support 4 and the second support 32 have the same structure, this embodiment will only use the locking unit on the first support 4 as an example for detailed explanation.

[0042] In this embodiment, a seat cushion folding frame 5 is fixed (e.g., welded or bolted) on the first seat cushion 1, and a backrest frame 3 is fixed (e.g., welded or bolted) on the first backrest 2. The seat cushion folding frame 5 and the backrest frame 3 are used to connect to the first support base 4.

[0043] In this embodiment, the locking unit, the first support base 4, the backrest frame 3, and the seat cushion folding frame 5 constitute the seat cushion locking structure.

[0044] Specifically, in combination Figures 2-7 As shown, a seat cushion locking structure includes a seat cushion folding frame 5, a backrest frame 3, a first support base 4, and a locking unit. It also includes a fixing shaft 7, which passes through the seat cushion folding frame 5, the backrest frame 3, and the first support base 4. The seat cushion folding frame 5 and the fixing shaft 7 are rotatably connected. Specifically, the rotation can be achieved by the fixing shaft 7 passing through a through hole on the seat cushion folding frame 5, and the engagement of the fixing shaft 7 with the through hole. Of course, in other embodiments, combined with… Figure 8 As shown, a rotating sleeve 29 can also be fitted onto the fixed shaft 7. The rotating sleeve 29 has an annular first assembly groove 43 on its circumferential surface, and the seat cushion folding frame 5 is rotatably assembled in the first assembly groove 43.

[0045] In this embodiment, the backrest frame 3 and the first support base 4 are located on both sides of the seat cushion folding frame 5, and the locking unit is located in the middle of the seat cushion folding frame 5 and the first support base 4.

[0046] The locking unit in this embodiment includes a first toothed plate 13, a second toothed plate 16, a toggle member 17, and a stabilizing member. The stabilizing member is fixed (e.g., by bolts) on the first support base 4. In this embodiment, the stabilizing member includes a first stabilizing member 19 and a second stabilizing member 9, both of which are plate-shaped and fixedly connected. The first stabilizing member 19 is close to the seat cushion folding frame 5, and the second stabilizing member 9 is close to the first support base 4. The first stabilizing member 19 has a fixing hole 21, which is fixed to the first support base 4 by a fixing bolt 6. Simultaneously, both the first stabilizing member 19 and the second stabilizing member 9 have holes through which a fixing shaft 7 passes. The fixing shaft 7 also passes through the first stabilizing member 19 and the second stabilizing member 9, thus the fixing shaft 7 also has a fixing effect on the first stabilizing member 19 and the second stabilizing member 9. When a rotating sleeve 29 is provided, combined with... Figure 8 As shown, the rotating sleeve 29 is provided with a second assembly groove 41 and a third assembly groove 40. The first stabilizing member 19 and the second stabilizing member 9 rotate in the second assembly groove 41 and the third assembly groove 40 respectively. The second assembly groove 41 and the third assembly groove 40 play a limiting role for the first stabilizing member 19 and the second stabilizing member 9.

[0047] There is a gap between the first stabilizer 19 and the second stabilizer 9, and the first toothed plate 13, the second toothed plate 16, and the actuating member 17 are located in the gap between the first stabilizer 19 and the second stabilizer 9.

[0048] In this embodiment, the first toothed plate 13 and the fixed shaft 7 are rotatably connected. Specifically, the first toothed plate 13 has a through hole through which the fixed shaft 7 passes. The rotation of the first toothed plate 13 on the fixed shaft 7 is achieved through the cooperation between the through hole and the fixed shaft 7. Of course, in other embodiments, combined with… Figure 8 As shown, when the rotating sleeve 29 is provided on the fixed shaft 7, the first toothed plate 13 is rotatably assembled on the outer circumferential surface 42 of the rotating sleeve 29, and the outer circumferential surface 42 is located between the second assembly groove 41 and the third assembly groove 40. After the first toothed plate 13 passes through the gap between the first stabilizer 19 and the second stabilizer 9, it is fixedly connected to the seat cushion folding frame 5, specifically by means of rivets 20.

[0049] In this embodiment, both the second toothed plate 16 and the actuating member 17 are rotatably connected to the stabilizing member. The specific rotation method of the second toothed plate 16 and the stabilizing member is as follows: a shaft 23 connects the first stabilizing member 19 and the second stabilizing member 9. The second stabilizing member 9 has a second through hole 25 for the shaft 23 to pass through, and the first stabilizing member 19 has a third through hole 27 for the shaft 23 to pass through. The shaft 23 passes through the second through hole 25 and the third through hole 27. Both ends of the shaft 23 are fixed (e.g., welded or riveted) to the first stabilizing member 19 and the second stabilizing member 9. The second toothed plate 16 has a through hole, and the shaft 23 passes through the through hole in the second toothed plate 16, thus achieving a rotatable connection between the second toothed plate 16 and the shaft 23. Therefore, the shaft 23 not only achieves the connection and fixation of the first stabilizing member 19 and the second stabilizing member 9, but also achieves the rotatable connection of the second toothed plate 16.

[0050] The specific rotation method of the actuating element 17 and the stabilizing element is as follows: A drive shaft 11 is welded onto the actuating element 17, with both ends of the drive shaft 11 located on both sides of the actuating element 17. The second stabilizing element 9 has a first through hole 24 for the drive shaft 11 to pass through. One end of the drive shaft 11 passes through the first through hole 24 and can rotate within it. Simultaneously, the first stabilizing element 19 also has a corresponding fourth through hole 28, with the other end of the drive shaft 11 passing through the fourth through hole 28 on the first stabilizing element 19 and rotatably positioned within it. In this way, the rotation of the actuating element 17 is achieved by the drive shaft 11 rotating between the first stabilizing element 19 and the second stabilizing element 9. In addition, by riveting the end of the drive shaft 11 near the first stabilizing element 19, the drive shaft 11 can also serve as a connection to the first stabilizing element 19, preventing the drive shaft 11 from detaching from it.

[0051] In this embodiment, the first toothed plate 13 is provided with a first locking tooth 14, and the second toothed plate 16 is provided with a second locking tooth 22. When the seat cushion folding frame 5 is in the upward folding state, the first locking tooth 14 and the second locking tooth 22 engage. The second toothed plate 16 is located between the first toothed plate 13 and the actuating member 17. A tension spring 12 connects the actuating member 17 and the stabilizing member. Specifically, the top end of the tension spring 12 is hooked onto the second stabilizing member 9, and the end of the actuating member 17 away from the second toothed plate 16 is provided with a hook portion 18, on which the bottom end of the tension spring 12 is hooked. The other end of the actuating member 17 can abut against the second toothed plate 16, and the actuating member 17 is tightly abutted against the second toothed plate 16 under the action of the tension spring 12. In the figure, the second toothed plate 16 is provided with a notch, and the end of the actuating member 17 is located in the notch and can move within the notch.

[0052] The first tooth plate 13 is also provided with a third locking tooth 15. When the seat cushion folding frame 5 is in a flat position, the third locking tooth 15 and the second locking tooth 22 engage, thereby also locking the seat cushion.

[0053] In this embodiment, the first support base 4 is provided with a clearance through hole, combined with Figure 3 As shown, the drive shaft 11 extends to the outside of the first support 4, and a drive handle 10 is fixedly connected (e.g., welded or riveted) to the drive shaft 11. The drive handle 10 is located on the side of the first support 4 away from the second stabilizer 9, and a pull strap 8 is connected to the drive handle 10.

[0054] In this embodiment, the fixed shaft 7 passes through the backrest frame 3 and is threaded to a nut, thereby limiting and fixing the backrest frame 3 on the first support seat 4, or welding the fixed shaft 7 to the backrest frame 3, or riveting the end of the fixed shaft 7 to the backrest frame 3.

[0055] The fixed shaft 7 can be a stepped shaft, divided into three sections: a first section 44, a second section 45, and an intermediate section between the first and second sections 44 and 45. The intermediate section is used to fit the rotating sleeve 29. One end of the rotating sleeve 29 abuts against the end of the second section 45, and the other end of the rotating sleeve 29 is flush with the end of the intermediate section. The first section 44 of the fixed shaft 7 extends out from the backrest frame 3 and is used to install the backrest frame 3. The second section 45 is used to install the first support seat 4. In this way, due to the abutment of the end of the rotating sleeve 29 (or the end of the intermediate section), the backrest frame 3 and the seat cushion folding frame 5 will not be tightly pressed together. The first support seat 4 abuts against the end of the rotating sleeve 29, and the first support seat 4 and the second stabilizing member 9 will not be tightly pressed together, thereby helping to reduce the pressure and friction between the parts.

[0056] In actual assembly, the rotating sleeve 29 and the locking unit can be assembled together first. Then, the locking unit is placed between the seat cushion folding frame 5 and the first support base 4, and the fixing shaft 7 passes through the first support base 4, the rotating sleeve 29 and the seat cushion folding frame 5. At the same time, the fixing shaft 7 passes through the backrest frame 3. Finally, the nut is screwed on the first section 44. With this assembly method, the locking unit and the rotating sleeve 29 are pre-assembled on the outside of the seat, which makes it faster and more convenient to assemble them together with the seat cushion folding frame 5, the first support base 4 and the backrest frame 3.

[0057] Of course, the structure of the rotating sleeve 29 on the fixed shaft 7 can also be replaced by setting an annular groove on the circumferential side wall of the fixed shaft 7.

[0058] The specific implementation process is as follows: the seat cushion folding frame 5 and the fixed shaft 7 are rotatably connected, so that the seat cushion folding frame 5 can fold and rotate on the first support seat 4, thereby realizing the folding of the first seat cushion 1.

[0059] Normally, the first seat cushion 1 is in a flat position, combined with Figure 5As shown, the third locking tooth 15 and the second locking tooth 22 engage, and the tension spring 12 exerts a pulling force on the actuating member 17, thereby causing the end of the actuating member 17 to press against the second toothed plate 16. The second toothed plate 16 and the first toothed plate 13 are not easily separated, and the third locking tooth 15 and the second locking tooth 22 are in a stable engaging state.

[0060] When the first seat cushion 1 needs to be folded, the pull strap 8 is pulled, which drives the drive handle 10 to rotate. The drive handle 10 drives the drive shaft 11 to rotate, and the drive shaft 11 drives the actuating element 17 to rotate. The actuating element 17 no longer abuts against the second toothed plate 16, and the second toothed plate 16 and the first toothed plate 13 become loose. The third locking tooth 15 and the second locking tooth 22 no longer engage. Then, the first seat cushion 1 is folded upwards. The first seat cushion 1 drives the seat cushion folding frame 5 to rotate on the fixed shaft 7, and the seat cushion folding frame 5 drives the first toothed plate 13 to rotate on the fixed shaft 7. After the shaft 7 rotates and the flip is completed, the first locking tooth 14 and the second locking tooth 22 are opposite each other. Then the pull strap 8 is released, and the actuating member 17 rotates in the opposite direction under the action of the tension spring 12. The actuating member 17 then presses the second toothed plate 16 against it. The second toothed plate 16 and the first toothed plate 13 are locked together, and the first locking tooth 14 and the second locking tooth 22 are engaged with each other. Thus, the second toothed plate 16 locks the first toothed plate 13, and the first toothed plate 13 cannot rotate. The seat cushion folding frame 5 also cannot rotate, thus achieving the locking of the first seat cushion 1 after it is folded upward.

[0061] When unlocking is required, the drive handle 10 is operated by the pull strap 8. The drive handle 10 drives the drive shaft 11 to rotate. The drive shaft 11 drives the actuating element 17 to rotate against the tension of the tension spring 12. The actuating element 17 no longer presses against the second toothed plate 16. The second toothed plate 16 and the first toothed plate 13 become loose. The first locking tooth 14 and the second locking tooth 22 separate, thereby unlocking. The first toothed plate 13 can rotate, so that the seat cushion folding frame 5 can fall down. The first seat cushion 1 falls down to a horizontal state, and the first seat cushion 1 can be sat on.

[0062] Of course, in some embodiments, the backrest frame 3 can also rotate around the fixed axis 7 on the first support base 4, so that the first backrest 2 can be reclined.

[0063] Example 2

[0064] This embodiment is a further optimization based on Embodiment 1, combining... Figures 10-12 As shown, in this embodiment, buffer blocks 34 are installed on the first support base 4, the second support base 32, and the third support base 33 to cushion the lowering of the seat cushion. Therefore, when the seat cushion is lowered, the buffer blocks 34 can cushion the seat cushion, reducing the impact between the seat cushion and the support base. The buffer blocks 34 can be made of rubber.

[0065] In this embodiment, a hydraulic rod 35 connects the first support base 4 and the first cushion 1. Specifically, the first support base 4 is provided with a first bracket 37, one end of the hydraulic rod 35 is a first rotating end 38, which is rotatably fixed to the first bracket 37 via a shaft, and a second bracket 39 is fixed to the first cushion 1. The other end of the hydraulic rod 35 is a second rotating end 36, which is rotatably connected to the second bracket 39. Thus, when the first cushion 1 is folded upwards, the hydraulic rod 35 can extend to provide assistance, making it easier to fold the first cushion 1 upwards.

[0066] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A seat with a foldable cushion, comprising a backrest, a support base, a cushion, and a locking unit, wherein a cushion folding frame is fixedly provided on the cushion, characterized in that: It also includes a fixed shaft that passes through the seat cushion folding frame and the support base, and the seat cushion folding frame and the fixed shaft are rotatably connected. The locking unit includes a first toothed plate, a second toothed plate, and a toggle member; the first toothed plate is rotatably connected to a fixed shaft, and the first toothed plate is fixedly connected to a seat cushion folding frame; the first toothed plate is provided with a first locking tooth and a third locking tooth, and the second toothed plate is provided with a second locking tooth; when the seat cushion folding frame is in an upward folding state, the first locking tooth and the second locking tooth engage; when the seat cushion folding frame is in a flat state, the third locking tooth and the second locking tooth engage. The second toothed plate is located between the first toothed plate and the actuating member. The actuating member is connected to a tension spring, and the actuating member abuts against the second toothed plate under the action of the tension spring.

2. The seat with a foldable cushion according to claim 1, characterized in that: The support base is equipped with a cushioning block to buffer the downward movement of the seat cushion.

3. A seat with a foldable cushion according to claim 1, characterized in that: A hydraulic rod is connected between the support base and the seat cushion. One end of the hydraulic rod is rotatably connected to the seat cushion, and the other end of the hydraulic rod is rotatably connected to the support base.

4. A seat with a foldable cushion according to claim 3, characterized in that: The number of support bases is three, and the number of seat cushions is two, one of which is a single seat cushion and the other is a multi-person seat cushion; the hydraulic rod is connected to at least the multi-person seat cushion.

5. A seat with a foldable cushion according to claim 1, characterized in that: The locking unit further includes a stabilizing element, which includes a first stabilizing element and a second stabilizing element. The first stabilizing element and the second stabilizing element are fixedly connected, and the first toothed plate, the second toothed plate, and the actuating element are all located between the first stabilizing element and the second stabilizing element.

6. A seat with a foldable cushion according to claim 5, characterized in that: The fixed shaft passes through the first stabilizer and the second stabilizer.

7. A seat with a foldable cushion according to claim 1, characterized in that: The fixed shaft is provided with a rotating sleeve, and the side wall of the rotating sleeve is provided with multiple annular assembly grooves.

8. A seat with a foldable cushion according to claim 7, characterized in that: One of the assembly slots has only one inner wall and is located at the end of the rotating sleeve.

9. A seat with a foldable cushion according to claim 7, characterized in that: The fixed shaft is a stepped shaft.

10. A seat with a foldable cushion according to claim 1, characterized in that: The backrest and support base are rotatably connected.

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