A seat with an adjustable backrest

Abstract

The utility model discloses an adjustable backrest seat, including backrest, cushion, chair frame, and backrest is connected with cushion through adjusting device, and adjusting device includes connecting rod, and connecting rod includes first end, second end, and removes backrest and can swing along the center of second end, and backrest is hinged with chair frame through connecting rod, and staff can quickly adjust its orientation train advancing direction when train reversal, and it is simple and easy to operate and is convenient for batch regulation, after adjusting, locking assembly connects backrest end, utilizes movable disc and spring bolt structure, and backrest can be fixed quickly without tool, prevents displacement, locking assembly is connected through sleeve pipe, and both sides synchronous action when adjusting, makes backrest stress even, removes smoothly, and cushion floating assembly is connected with transmission sleeve pipe, and cushion automatically adjusts the inclination direction when backrest adjusting, and the angle of coordination with backrest, reduces repeated regulation.

Description

Technical Field

[0001] This utility model belongs to the field of seating technology, specifically relating to a seat with an adjustable backrest. Background Technology

[0002] Most existing rail trains use 180° rotating seats to accommodate trains traveling in both directions. However, this type of seat has significant drawbacks: during adjustment, staff need to manually rotate a large number of seats, which is time-consuming and laborious. Frequent rotation can cause wear and tear on rotating parts, leading to seat shaking, jamming, or even failure, increasing maintenance costs and safety hazards. Utility Model Content

[0003] To address the problems mentioned in the background art, this utility model provides the following technical solution: an adjustable backrest seat, comprising a backrest, a seat cushion, and a chair frame, wherein the chair frame is installed on both sides of the seat cushion, and the backrest is connected to the seat cushion via an adjustment device, the adjustment device comprising a connecting rod, the connecting rod comprising a first end and a second end, the first end and the second end being hinged to the backrest and the chair frame respectively, and the backrest can be moved to swing around the second end as the center.

[0004] Furthermore, a locking component is connected to the first end or the second end, the locking component being used to limit whether the backrest can swing around the second end as a center.

[0005] Furthermore, the locking assembly includes a movable disc and a spring pin. The second end is connected to the movable disc. The movable disc is connected to the outer wall of the chair frame via a hollow shaft. The spring pin is connected inside the hollow shaft. The movable disc has a pin hole that matches the pin in the spring pin.

[0006] Furthermore, each chair frame is equipped with a locking component, and the two movable discs are connected by a transmission sleeve.

[0007] Furthermore, the seat cushion floating assembly is connected to the transmission sleeve. The floating assembly includes a limiting plate and a limiting frame. The limiting frame is connected to the bottom of the seat cushion. The limiting plate is sleeved on the outer wall of the transmission sleeve. The limiting plate is located inside the limiting frame. The limiting frame is used to limit the rotation angle range of the limiting plate.

[0008] Furthermore, a first baffle is provided inside the limiting frame, and a second baffle is provided on the outer wall of the limiting disk. When the limiting disk rotates, the first baffle and the second baffle abut against each other when the limiting disk rotates to a set extreme rotation angle.

[0009] Furthermore, the connecting rod is provided in two parts.

[0010] Furthermore, a lever mechanism is installed on the chair frame, the lever mechanism including a power point and a resistance point, the resistance point being connected to the spring pin.

[0011] Furthermore, a modesty cover is provided at the bottom of the cushion.

[0012] The beneficial effects of this utility model are as follows: The backrest is hinged to the seat frame via a connecting rod, allowing staff to quickly adjust its orientation towards the train's direction of travel when the train changes direction, simplifying operation and facilitating batch adjustments; after adjustment, the locking component connects to the end of the backrest, utilizing a movable disc and spring pin structure to quickly fix the backrest without tools, preventing displacement; the locking component is connected via a sleeve, allowing simultaneous movement on both sides during adjustment, ensuring even force distribution and smooth movement of the backrest; the floating seat cushion component is connected to the transmission sleeve, automatically adjusting the seat cushion's tilt direction to coordinate with the backrest angle during backrest adjustment, reducing repeated adjustments; the limit bracket and the limit disc's baffle limit the maximum adjustment angle of the seat cushion, while the limit bracket supports the seat cushion, preventing wobbling and displacement during adjustment; the two connecting rods distribute the force, ensuring structural stability under frequent adjustments; the lever mechanism is connected to the foot pedal, transforming backrest adjustment into a relaxed stepping action, unrestricted by the staff's strength; the bottom cover of the seat cushion conceals the adjustment structure, preventing passenger contact, protecting components from damage and accidental injury, and maintaining the cleanliness of the carriage. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present utility model;

[0014] Figure 2 This is the front view of the present invention;

[0015] Figure 3 for Figure 2 Schematic diagram of cross section along the AA direction;

[0016] Figure 4 for Figure 3 Enlarged view of section B;

[0017] Figure 5 This is a front view of the chair frame and the cover in this utility model;

[0018] Figure 6 This is a first-view structural diagram of the removal of the chair frame and the modesty cover in this utility model;

[0019] Figure 7 This is a second-view structural diagram of the removal of the chair frame and the modesty cover in this utility model;

[0020] Figure 8 This is a first-view structural diagram of the linkage mechanism and locking assembly in this utility model;

[0021] Figure 9This is a second-view structural diagram of the linkage mechanism and locking assembly in this utility model;

[0022] Figure 10 This is a schematic diagram showing the connection relationship between the connecting rod and the movable disc in this utility model;

[0023] Figure 11 This is a first usage diagram of the present invention;

[0024] Figure 12 This is a second usage diagram of the present invention.

[0025] The labels in the diagram mean: 1-backrest; 2-seat cushion; 3-chair frame; 4-first end; 5-second end; 6-moving disc; 7-spring pin; 8-hollow shaft; 9-pin hole; 10-limiting disc; 11-limiting frame; 12-first baffle; 13-second baffle; 14-power point; 15-resistance point; 16-foot pedal; 17-mask; 18-transmission sleeve. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-12 The present invention provides the following technical solution: an adjustable backrest 1 and a seat cushion 2, including a backrest 1, a seat cushion 2, and a chair frame 3. The chair frame 3 is installed on both sides of the seat cushion 2. The backrest 1 is connected to the seat cushion 2 through an adjustment device. The adjustment device includes a connecting rod, which includes a first end 4 and a second end 5. The first end 4 and the second end 5 are respectively hinged to the backrest 1 and the chair frame 3. The backrest 1 can be moved to swing around the second end 5 as the center.

[0028] In the above structure, the two ends 5 on the left and right sides are connected by a rod. When the rail train changes its direction of travel, the hinged design of the backrest 1 and the connecting rod allows the staff to quickly adjust the backrest 1 to face the direction of train travel. The standardized swing adjustment mode makes the operation simple and efficient, allowing the staff to quickly complete batch adjustments of the backrest 1 position after the train changes direction, so as to meet the riding needs of passengers in different directions of travel.

[0029] In this embodiment, the first end 4 or the second end 5 is connected to a locking component, which is used to limit whether the backrest 1 can swing around the second end 5 as the center.

[0030] With the above structure, after the train switches between forward and reverse directions, the staff can adjust the position of the backrest 1 and the locking component can quickly fix the backrest 1 in place.

[0031] In this embodiment, the locking assembly includes a movable disc 6 and a spring pin 7. The second end 5 is connected to the movable disc 6. The movable disc 6 is connected to the outer wall of the chair frame 3 through a hollow shaft 8. The spring pin 7 is connected inside the hollow shaft 8. The movable disc 6 has a pin hole 9 that matches the pin in the spring pin 7.

[0032] With the above structure, staff can quickly lock and unlock the backrest after adjusting its position without the need for special tools, even when the train is traveling in both directions.

[0033] In this embodiment, each chair frame 3 is equipped with a locking component, and the two movable discs 6 are connected by a transmission sleeve 18.

[0034] Using the above structure, two sets of linkage adjustment structures are connected by the transmission sleeve 18. This design allows the backrest 1 to move synchronously on both sides when adjusting its position, resulting in more even force distribution and smoother movement.

[0035] In this embodiment, the floating component of the seat cushion 2 is connected to the transmission sleeve 18. The floating component includes a limiting plate 10 and a limiting frame 11. The limiting frame 11 is connected to the bottom of the seat cushion 2. The limiting plate 10 is sleeved on the outer wall of the transmission sleeve 18. The limiting plate 10 is located inside the limiting frame 11. The limiting frame 11 is used to limit the rotation angle range of the limiting plate 10.

[0036] With the above structure, the floating component of the seat cushion 2 is connected to the transmission sleeve 18 and works in conjunction with the two sets of adjustment devices. When the staff adjusts the position of the backrest 1 to adapt to the train's forward and reverse movement, the seat cushion 2 will automatically and smoothly adjust its tilt direction according to the change of the backrest 1, so that the seat cushion 2 and the backrest 1 always maintain a coordinated angular relationship, reducing repeated adjustment steps and greatly improving the smoothness and efficiency of the overall adjustment work.

[0037] In this embodiment, a first baffle 12 is provided inside the limiting frame 11, and a second baffle 13 is provided on the outer wall of the limiting disk 10. When the limiting disk 10 rotates, the first baffle 12 and the second baffle 13 abut against each other when the limiting disk 10 rotates to the set extreme rotation angle.

[0038] With the above structure, during the adjustment of the backrest 1 and the seat cushion 2, the maximum angle adjustment range of the seat cushion 2 is limited, and the limiting frame 11 provides reliable support for the seat cushion 2.

[0039] In this embodiment, two connecting rods are provided.

[0040] With the above structure, when the rail train frequently travels in both directions and the staff adjusts the position of the backrest 1 multiple times, the two sets of connecting rods can more effectively distribute the force and reduce the risk of wear and damage to the components caused by uneven force.

[0041] In this embodiment, a lever mechanism is installed on the chair frame 3. The lever mechanism includes a power point 14 and a resistance point 15. The resistance point 15 is connected to the spring pin 7, and the power point 14 is connected to a foot pedal 16.

[0042] Using the above structure, the operation of adjusting the position of the backrest 1 is transformed into a simple stepping action. When the backrest 1 needs to be quickly adjusted when the train is traveling in both directions, regardless of the strength of the staff, the task of adjusting the position of the backrest 1 can be completed easily and smoothly through standardized stepping operations.

[0043] In this embodiment, a modesty cover 17 is provided at the bottom of the cushion 2.

[0044] In the above structure, the privacy cover 17 is used to cover the adjustment-related structure and to prevent the user from touching the related structure.

[0045] Working principle: When the backrest 1 is pushed, the connecting rod swings around the hinge point with the chair frame 3, causing the backrest 1 to adjust its angle. When the angle needs to be adjusted, the user steps on the foot pedal 16 connected to the power point 14 in the lever mechanism. The lever mechanism is subjected to force, which overcomes the spring force and pulls the pin out of the pin hole 9 on the movable plate 6, allowing the movable plate 6 to rotate freely. At this time, the backrest 1 can swing freely to adjust its angle. After adjusting to the appropriate angle, the foot pedal 16 is released, and the pin is directly inserted into the pin hole 9 on the movable plate 6 under the action of the spring, restricting the rotation of the movable plate 6 and thus fixing the backrest 1. The two movable plates 6 are connected by sleeves to achieve synchronous locking and unlocking. During the adjustment of the backrest 1, the transmission sleeve 18 drives the limit plate 10 to rotate. Since the limit plate 10 is sleeved on the outer wall of the transmission sleeve 18 and located in the limit frame 11 at the bottom of the seat cushion 2, the rotation of the limit plate 10 will cause the seat cushion 2 to move together. When the orientation of the backrest 1 changes, the transmission sleeve 18 drives the limiting plate 10 to rotate. When the limiting plate 10 rotates to the set extreme rotation angle within the limiting frame 11, the first baffle 12 inside the limiting frame 11 abuts against the second baffle 13 on the outer wall of the limiting plate 10. Under the premise of ensuring the stability of the seat cushion 2, the tilt direction of the seat cushion 2 is adjusted according to the orientation of the backrest 1 so that the position of the seat cushion 2 matches that of the backrest 1.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A seat with an adjustable backrest, comprising a backrest, a seat cushion, and a frame, wherein the frame is mounted on both sides of the seat cushion, characterized in that: The backrest is connected to the seat cushion via an adjustment device. The adjustment device includes a connecting rod with a first end and a second end. The first end and the second end are respectively hinged to the backrest and the chair frame. The backrest can be moved to swing around the second end as the center.

2. The adjustable backrest seat according to claim 1, characterized in that: The first end or the second end is connected to a locking component, which is used to limit whether the backrest can swing around the second end as a center.

3. The adjustable backrest seat according to claim 2, characterized in that: The locking assembly includes a movable disc and a spring pin. The second end is connected to the movable disc. The movable disc is connected to the outer wall of the chair frame via a hollow shaft. The spring pin is connected inside the hollow shaft. The movable disc has a pin hole that matches the pin in the spring pin.

4. The adjustable backrest seat according to claim 3, characterized in that: Each chair frame is equipped with a locking component, and the two movable discs are connected by a transmission sleeve.

5. The adjustable backrest seat according to claim 4, characterized in that: The seat cushion floating assembly is connected to the transmission sleeve. The floating assembly includes a limiting plate and a limiting frame. The limiting frame is connected to the bottom of the seat cushion. The limiting plate is sleeved on the outer wall of the transmission sleeve. The limiting plate is located inside the limiting frame. The limiting frame is used to limit the rotation angle range of the limiting plate.

6. The adjustable backrest seat according to claim 5, characterized in that: The limiting frame is provided with a first baffle, and the outer wall of the limiting disk is provided with a second baffle. When the limiting disk rotates, when the limiting disk rotates to a set extreme rotation angle, the first baffle and the second baffle abut against each other.

7. The adjustable backrest seat according to claim 1, characterized in that: The connecting rod has two parts.

8. The adjustable backrest seat according to claim 3, characterized in that: The chair frame is equipped with a lever mechanism, which includes a power point and a resistance point, and the resistance point is connected to the spring pin.

9. The adjustable backrest seat according to claim 1, characterized in that: The bottom of the cushion is provided with a modesty cover.

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