Back folding seat

Abstract

The utility model discloses a back folding seat, which belongs to the technical field of stand seats and comprises a seat cushion and a backrest, the backrest is rotatably connected with the seat cushion through a connecting component, the connecting component comprises a connecting piece fixedly connected to the bottom surface of the seat cushion, and the connecting piece is provided with a first movable rod, a second movable rod and a guide groove. The bottom end of the first movable rod is rotationally connected with a first connecting shaft slidably arranged in the guide groove, the top end of the first movable rod is fixedly connected with the backrest, one end of the second movable rod is rotationally connected with a second connecting shaft on the connecting piece, and the other end of the second movable rod is rotationally connected with a third connecting shaft on the first movable rod. The guide groove comprises a first arc section, a second arc section and a horizontal section which are sequentially arranged from bottom to top. According to the back folding seat with the structure, the backrest can be turned backwards to be flush with the cushion, so that a stand can stretch out and draw back conveniently, and the problem that the number of steps of the stand is small due to the fact that the height of the folded seat is large in the prior art is solved.

Description

Technical Field

[0001] This utility model belongs to the field of grandstand seating technology, and in particular relates to a folding seat with a rear folding mechanism. Background Technology

[0002] Retractable grandstands are installed in large indoor or outdoor venues for convenient viewing of performances or games. When not in use, the grandstand retracts into a square block to reduce space usage. When extended, it becomes a stepped structure and includes seating for people to rest. To facilitate the retraction of the grandstand, the seating is designed to be foldable.

[0003] Existing seats fold by flipping the backrest forward, so that the backrest is flush against the seat. To improve comfort, the seats are usually designed with a certain height to allow spectators to maintain a comfortable leg position. Therefore, even with the backrest folded, the overall height of the seats is still relatively high, requiring a significant height difference between adjacent stands. With the overall stand height being the same, this results in fewer steps and a corresponding reduction in the number of seats.

[0004] To increase the number of tiers in the stands and the number of seats, a new type of folding seat is needed to further reduce the height of the seat after folding. Utility Model Content

[0005] The purpose of this utility model is to provide a backrest folding seat that can be flipped back to be flush with the seat cushion, thereby facilitating the extension and retraction of the grandstand. Compared with the existing technology of folding seats with forward-flipping backrests, this can further reduce the height of the seat after folding, solving the problem that the height of the seat after folding in the existing technology is too high, resulting in fewer steps for viewing the grandstand.

[0006] To achieve the above objectives, this utility model provides a folding seat with a backrest, including a seat cushion and a backrest. The backrest is rotatably connected to the seat cushion via at least two connecting components. Each connecting component includes a connector fixedly connected to the bottom surface of the seat cushion. The connector is provided with a first movable rod, a second movable rod, and a guide groove. The bottom end of the first movable rod is rotatably connected to a first connecting shaft slidably disposed in the guide groove, and the top end of the first movable rod is fixedly connected to the backrest. One end of the second movable rod is rotatably connected to a second connecting shaft on the connector, and the other end of the second movable rod is rotatably connected to a third connecting shaft on the first movable rod. The guide groove includes a first arc segment, a second arc segment, and a horizontal segment arranged sequentially from bottom to top. The first arc segment corresponds to the upward rotation trajectory of the first movable rod about the second connecting shaft, and the second arc segment corresponds to the downward rotation trajectory of the first movable rod about the third connecting shaft.

[0007] Preferably, the connector includes a frame and an extension plate. The top surface of the frame is fixedly connected to the bottom surface of the cushion. The bottom surface of the frame is provided with mounting holes. The extension plate is fixedly connected to one end of the frame near the backrest. The first movable rod, the second movable rod, and the guide groove are all located on the extension plate.

[0008] Preferably, both the top and bottom ends of the backrest are fixedly connected to an edge strip, and the edge strip is provided with a connecting groove that is adapted to the backrest. The first movable rod is fixedly connected to the edge strip.

[0009] Preferably, a vertically arranged baffle is fixedly connected to the bottom surface of the seat cushion on the side away from the backrest.

[0010] Preferably, the connector is equipped with a hydraulic cylinder, the top end of the telescopic rod of the hydraulic cylinder is fixedly connected to the support plate, and the top surface of the support plate is in contact with the bottom surface of the backrest in the supported state.

[0011] Therefore, the rear-folding seat of this utility model with the above-described structure has the following beneficial effects:

[0012] The backrest can be folded back to be flush with the seat cushion, which facilitates the extension and retraction of the grandstand. Compared with the existing technology of folding seats with forward-folding backrests, it can further reduce the height of the seat after folding, solving the problem that the height of the seat after folding is too high, resulting in fewer steps for viewing the grandstand.

[0013] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of an embodiment of the rear-folding seat of this utility model;

[0015] Figure 2 This is a structural schematic diagram of an embodiment of the connecting member in a rear-mounted folding seat according to the present invention.

[0016] In the diagram: 1. Seat cushion; 2. Backrest; 3. Connector; 31. Frame; 32. Extension plate; 4. First movable rod; 5. Second movable rod; 6. Guide groove; 61. First arc segment; 62. Second arc segment; 63. Horizontal segment; 7. First connecting shaft; 8. Second connecting shaft; 9. Third connecting shaft; 10. Mounting hole; 11. Edge banding strip; 12. Baffle; 13. Hydraulic cylinder; 14. Support plate; 15. Sponge pad. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Example

[0020] Reference Figure 1-2 As shown, this embodiment provides a backrest folding seat, including a seat cushion 1 and a backrest 2. The backrest 2 is rotatably connected to the seat cushion 1 via at least two connecting components; in this embodiment, three connecting components are provided. Each connecting component includes a connector 3 fixedly connected to the bottom surface of the seat cushion 1. The connector 3 has a first movable rod 4, a second movable rod 5, and a guide groove 6. The bottom end of the first movable rod 4 is rotatably connected to a first connecting shaft 7 slidably disposed within the guide groove 6. The guide groove 6 can limit the movement trajectory of the first connecting shaft 7 and the first movable rod 4. The top end of the first movable rod 4 is fixedly connected to the backrest 2, which can be a bolt connection. After the fixed connection, the backrest 2 can move synchronously with the first movable rod 4. One end of the second movable rod 5 is rotatably connected to a second connecting shaft 8 on the connector 3, and the other end of the second movable rod 5 is rotatably connected to a third connecting shaft 9 on the first movable rod 4. The second movable rod 5 can limit the movement of the first movable rod 4. The guide groove 6 includes a first arc segment 61, a second arc segment 62 and a horizontal segment 63 arranged sequentially from bottom to top. The first arc segment 61 corresponds to the upward rotation trajectory of the first movable rod 4 about the second connecting shaft 8, and the second arc segment 62 corresponds to the downward rotation trajectory of the first movable rod 4 about the third connecting shaft 9.

[0021] In use, moving the backrest 2 upwards causes the first connecting shaft 7 to move along the first arc segment 61. After moving to the end of the first arc segment 61, pressing the backrest 2 downwards causes the first connecting shaft 7 to move along the second arc segment 62. After moving to the end of the second arc segment 62, the backrest 2 is in a horizontal position. Then, pushing the backrest 2 forward towards the seat causes one end of the first connecting shaft 7 to enter the horizontal segment 63, locking the horizontal posture of the backrest 2. When the height of the backrest 2 and the seat cushion 1 is appropriate, the backrest 2 can be flush with the seat cushion 1 in a horizontal posture, thus facilitating the extension and retraction of the stands. This is different from the folding backrest 2 that flips forward in the prior art. Compared to other types of seats, this design can further reduce the height of the folded seat, solving the problem in existing technologies where the folded seat height is too high, resulting in fewer steps to see. The backrest 2 is pulled horizontally backward, causing the first connecting shaft 7 to move from the horizontal section 63 into the second arc section 62. Then, the backrest 2 is moved upward, causing the first connecting shaft 7 to move along the second arc section 62. After moving to the end of the second arc section 62, the backrest 2 is moved downward, causing the first connecting shaft 7 to enter the bottom end of the first arc section 61. At this time, the guide groove 6, the first movable rod 4, and the second movable rod 5 work together to lock the backrest 2 in the tilted state.

[0022] In a further optimized design, the connector 3 includes a frame 31 and an extension plate 32. The top surface of the frame 31 is fixedly connected to the bottom surface of the seat cushion 1. The frame 31 can raise the height of the seat cushion 1 and also provide moisture and heat insulation, improving seating comfort. The bottom surface of the frame 31 has mounting holes 10, which are used with bolts and other fasteners to fix the entire seat to the steps of the grandstand. The extension plate 32 is fixedly connected to the end of the frame 31 near the backrest 2. The first movable rod 4, the second movable rod 5, and the guide groove 6 are all located on the extension plate 32.

[0023] In a further optimized design, edging strips 11 are fixedly connected to both the top and bottom ends of the backrest 2. The edging strips 11 have connecting grooves that adapt to and connect with the backrest 2. The first movable rod 4 is fixedly connected to the edging strips 11. The edging strips 11 increase the strength and wear resistance of the backrest 2.

[0024] In a further optimized design, a vertically installed baffle 12 is fixedly connected to the bottom surface of the seat cushion 1 on the side away from the backrest 2. The baffle 12 is used to prevent debris from entering the frame 31 through the feet.

[0025] In a further optimized design, a hydraulic cylinder 13 is provided on the connector 3. During use, the hydraulic cylinder 13 is connected to an oil tank fixed to the connector 3 via a hydraulic pump and an oil delivery pipe. The top end of the telescopic rod of the hydraulic cylinder 13 is fixedly connected to a support plate 14, and the top surface of the support plate 14 contacts the bottom surface of the backrest 2 in its supported state. The hydraulic cylinder 13 is used to lift the backrest 2 upwards, thereby driving the first connecting shaft 7 to move along the first arc segment 61, reducing the manual labor intensity required to flatten the backrest 2.

[0026] Further optimization involves incorporating foam pads 15 on both the seat cushion 1 and the backrest 2. These foam pads 15 enhance the comfort of the audience.

[0027] Therefore, the present invention adopts a back-folding seat with the above-mentioned structure, the backrest can be flipped back to be flush with the seat cushion, thereby facilitating the extension and retraction of the grandstand. Compared with the existing technology of folding seats with forward-flipping backrests, it can further reduce the height of the seat after folding, and solve the problem that the height of the seat after folding in the existing technology is too high, resulting in fewer steps for viewing.

[0028] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A back-folding seat, comprising a seat cushion (1) and a backrest (2), characterized in that: The backrest (2) is rotatably connected to the seat cushion (1) via at least two connecting components. Each connecting component includes a connector (3) fixedly connected to the bottom surface of the seat cushion (1). The connector (3) is provided with a first movable rod (4), a second movable rod (5), and a guide groove (6). The bottom end of the first movable rod (4) is rotatably connected to a first connecting shaft (7) slidably disposed in the guide groove (6). The top end of the first movable rod (4) is fixedly connected to the backrest (2). One end of the second movable rod (5) is connected to a second connecting shaft (7) on the connector (3). The shaft (8) is rotatably connected, and the other end of the second movable rod (5) is rotatably connected to the third connecting shaft (9) on the first movable rod (4). The guide groove (6) includes a first arc segment (61), a second arc segment (62) and a horizontal segment (63) arranged sequentially from bottom to top. The first arc segment (61) matches the upward movement trajectory of the first movable rod (4) rotating around the second connecting shaft (8). The second arc segment (62) matches the downward movement trajectory of the first movable rod (4) rotating around the third connecting shaft (9).

2. The rear-mounted folding seat according to claim 1, characterized in that: The connector (3) includes a frame (31) and an extension plate (32). The top surface of the frame (31) is fixedly connected to the bottom surface of the cushion (1). The bottom surface of the frame (31) is provided with mounting holes (10). The extension plate (32) is fixedly connected to one end of the frame (31) near the backrest (2). The first movable rod (4), the second movable rod (5) and the guide groove (6) are all located on the extension plate (32).

3. The rear-mounted folding seat according to claim 1, characterized in that: The top and bottom of the backrest (2) are both fixedly connected with a binding strip (11). The binding strip (11) is provided with a connecting groove that is adapted to the backrest (2). The first movable rod (4) is fixedly connected to the binding strip (11).

4. The rear-mounted folding seat according to claim 2, characterized in that: A vertically arranged baffle (12) is fixedly connected to the bottom surface of the cushion (1) away from the backrest (2).

5. The rear-mounted folding seat according to claim 1, characterized in that: The connector (3) is equipped with a hydraulic cylinder (13), the top end of the telescopic rod of the hydraulic cylinder (13) is fixedly connected to the support plate (14), and the top surface of the support plate (14) is in contact with the bottom surface of the backrest (2) in the supported state.

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