Backrest-adjustable seat with protective structure

Abstract

The utility model discloses a backrest-adjustable seat with a protective structure, which comprises a seat frame, a foot stool and a backrest, a seat plate is mounted on the seat frame, the backrest and the seat frame are connected through a joint mechanism to form a rotatable structure, and a limiting component is arranged on the joint mechanism; a protective cover is arranged on the seat frame and covers the connecting part of the backrest and the seat frame and a limiting part of the joint mechanism; the protective cover is in butt joint with the tail of the seat plate, and the position of the protective cover is not higher than that of the seat plate. Therefore, even if simple joints and limiting structures are adopted, parts which may clamp people cannot be exposed, so that potential safety hazards are eliminated, the safety is improved, and the chair is particularly suitable for being used as a chair in schools. And meanwhile, the synchronous rod is connected between the two movable foot pipes to ensure that the movable foot pipes synchronously ascend and descend, and the synchronous rod is wrapped by the protective pipe, so that the linkage structure is simplified, and the safety is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to chair product technical field, especially a backrest adjustable seat. BACKGROUND

[0002] The seat is important furniture for people's life, work and study, and the traditional seat has no special function and can only be used for sitting. Long time keeping one sitting posture not only feels uncomfortable, but also can cause some direct occupational diseases such as lumbar hyperosteogeny. Therefore, people invent some backrest adjustable seats, and some can be used as deck chairs by putting backrest down, and the backrest and seat frame are connected through joints to form a rotatable structure. In order to limit the adjusting range of the backrest, a limiting mechanism is generally arranged on the joint. However, since the joint and limiting mechanism of most seats are relatively simple for the consideration of cost control, they are usually not protected. This leads to the possibility of finger injury when adjusting the backrest if the finger is placed on the joint, especially for school chairs, and the possibility of finger injury increases greatly due to the students' nature of being active, so there is a safety hazard. In addition, for the lifting school chair, since the two movable foot pipes need to be lifted at the same time, a relatively complex side-moving structure is generally used to ensure the synchronization of lifting of the two sides. SUMMARY

[0003] The utility model provides a backrest adjustable seat with a protection structure, which has simpler structure, more reasonable design, better safety and lower cost.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: a backrest adjustable seat with a protection structure, which comprises a seat frame, a foot support and a backrest, a seat plate is installed on the seat frame, the backrest and the seat frame are connected through a joint mechanism to form a rotatable structure, a limiting component is arranged on the joint mechanism to limit the rotation adjusting range of the backrest, and the seat frame is provided with a protection cover, the connecting part of the backrest and the seat frame and the limiting component of the joint mechanism are covered by the protection cover, the protection cover is butted against the tail of the seat plate, and the position of the protection cover is not higher than that of the seat plate.

[0005] Further, the protection cover is made of plastic material, support strips and side blocking strips are arranged on the inner surface and the side surface of the protection cover respectively at positions opposite to the joint mechanism, the support strips are pressed on the top of the joint mechanism, and the side blocking strips abut against the side surface of the joint mechanism.

[0006] Further, a skeleton in cross structure is arranged on the bottom surface of the cover plate at the middle position of the protection cover.

[0007] Further, the foot support is of a lifting type structure, and comprises a fixed foot support and movable foot pipes, the movable foot pipes are movably arranged in the fixed foot support, and a synchronous rod is connected between the two movable foot pipes.

[0008] Further, the synchronous rod is sleeved with a protective tube outside, and the two ends of the protective tube are welded and fixed with the two movable foot pipes.

[0009] Further, a foot support is arranged on the bottom of the seat frame and extends forward, and a foot rest is arranged on the foot support.

[0010] Further, shaft portions are arranged at the two ends of the front end of the foot support, protruding limiting blocks are arranged on the inner sides of the shaft portions; shaft seats are arranged on the two sides of the tail of the foot rest, the shaft seats are matched with the shaft portions, the shaft seats are provided with shaft holes, the front end shaft rods of the foot support are inserted into the shaft holes; rotating grooves are arranged on the outer sides of the shaft seats and opposite to the limiting blocks, the limiting blocks are embedded in the rotating grooves; stop blocks are arranged in the rotating grooves, and the stop blocks abut against the limiting blocks to limit the position of the foot rest when the foot rest is unfolded or recovered.

[0011] Further, handrails are arranged on the two sides of the seat frame through handrail pipes, the handrail pipes are in L-shaped structures, and the bottom ends of the handrail pipes are fixed on the bottom surface of the seat frame.

[0012] Further, the backrest is fixedly arranged through a fixed pipe, the fixed pipe is connected with a shaft pipe, the shaft pipe is movably arranged with the joint mechanism of the seat frame, and the shaft pipe is covered by the protective cover.

[0013] The utility model discloses a protective cover is arranged on the tail of the seat frame to cover the joint mechanism and the limiting part of the shaft rod and the seat frame, so that even if simple joint and limiting structure are adopted, the part that can be pinched is not exposed, thereby eliminating the security risk and improving the safety, and the utility model is especially suitable for being used as a school chair. Meanwhile, the synchronous rod is connected between the two movable foot pipes to ensure that the movable foot pipes are synchronously lifted, and the synchronous rod is wrapped with the protective tube outside, so that the linkage structure is simplified and the safety is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the main body structure diagram of the utility model;

[0015] Figure 2 It is the exploded view of the utility model;

[0016] Figure 3 It is the structure diagram after the backrest and the seat plate are removed;

[0017] Figure 4 It is the structure diagram of another angle after the backrest and the seat plate are removed;

[0018] Figure 5 It is the exploded view of the protective cover and the seat frame main body;

[0019] Figure 6 It is the exploded view of the protective cover and the seat frame main body of another angle;

[0020] Figure 7Structure diagram of foot rest.

[0021] In the figure, 1 is a seat frame, 11 is a joint mechanism, 12 is a limiting part, 2 is a foot support, 21 is a fixed foot support, 22 is a movable foot pipe, 23 is a protective pipe, 3 is a protective cover, 31 is a cover plate, 32 is a skeleton, 33 is a support bar, 34 is a side blocking bar, 4 is a seat plate, 5 is a backrest, 51 is a fixed pipe, 52 is a shaft pipe, 6 is a foot rest, 61 is a shaft seat, 62 is a shaft hole, 63 is a rotating groove, 64 is a stop block, 7 is a foot rest frame, 71 is a shaft part, 72 is a limiting block, 8 is a handrail, 81 is a handrail pipe. DETAILED DESCRIPTION

[0022] In this embodiment, referring to Figures 1-7 , the backrest-adjustable chair with protective structure comprises a seat frame 1, a foot support 2 and a backrest 5. The seat frame 1 is provided with a seat plate 4 (which can be hard or soft). The backrest 5 is connected to the seat frame 2 through a joint mechanism 11 to form a rotatable structure (the joint mechanism 11 is a prior art, and its structural details are not described here). A limiting part 12 (such as a protruding limiting piece) is arranged on the joint mechanism 11 to limit the rotation adjustment range of the backrest 5, so that the backrest 5 can be parked after being adjusted to the right position. A protective cover 3 is arranged on the seat frame 1 to cover the connecting part of the backrest 5 and the seat frame 1 and the limiting part 12 of the joint mechanism 11. The protective cover 3 is connected to the tail of the seat plate 4, and the position of the protective cover 3 is not higher than that of the seat plate 4, so as not to be uncomfortable when sitting.

[0023] The protective cover 3 is made of plastic material, and the inner surface and the side surface thereof are respectively provided with a support bar 33 and a side blocking bar 34 at positions opposite to the joint mechanism 11. The support bar 33 is pressed on the top of the joint mechanism 11, and the side blocking bar 34 abuts against the side surface of the joint mechanism 11, so as to improve the stability of the protective cover 3 and prevent loosening, and also improve the structural strength. The protective cover 3 and the seat frame 1 can be clamped or fixed by screws.

[0024] The bottom surface of the cover plate 31 at the middle position of the protective cover 3 is provided with a skeleton 32 in a cross structure, so as to improve the structural strength of the protective cover 3 and prevent it from being broken under pressure.

[0025] The foot support 2 is of a lifting structure, which comprises a fixed foot support 21 and a movable foot pipe 22. The movable foot pipe 22 is movably arranged in the fixed foot support 21, and a synchronous rod (hidden) is connected between the two movable foot pipes 21. When adjusting the lifting, only one side needs to be adjusted, and the two movable foot pipes 22 can be synchronously lifted through the synchronous rod. The structure of the synchronous rod is very simple.

[0026] The synchronous rod is sleeved with a protective pipe 23, and the two ends of the protective pipe 23 are respectively welded and fixed with the two movable foot pipes 22, so as to protect the synchronous rod.

[0027] The foot support 7 is arranged at the bottom of the seat frame 1 and extends forwardly, and the foot support 6 is arranged on the foot support 7 so as to put feet when lying.

[0028] The foot support 7 is arranged at the bottom of the seat frame 1 and extends forwardly, and the foot support 6 is arranged on the foot support 7 so as to put feet when lying.

[0029] The handrail 8 is arranged on both sides of the seat frame 1 through the handrail pipe 81, the handrail pipe 81 is in L-shaped structure, and the bottom end of the handrail pipe 81 is fixed on the bottom surface of the seat frame 1.

[0030] The backrest 5 is fixed through the fixed pipe 51, the fixed pipe 51 is connected with the shaft pipe 52, the shaft pipe 52 is movably assembled with the joint mechanism 11 of the seat frame 1, and the shaft pipe 52 is covered by the protective cover 3.

[0031] The seat chair is especially suitable for being used as a class chair in a school and can provide comfortable sitting and lunch break environment for students.

[0032] The above has made a detailed description of the utility model, the above is only the preferred embodiment of the utility model, and cannot limit the utility model implementation range, namely, all equivalent changes and modifications made according to the application range should still belong to the utility model coverage.

Claims

1. A chair with an adjustable backrest and a protective structure, comprising a seat frame, a foot frame, and a backrest, wherein a seat plate is mounted on the seat frame, the backrest and the seat frame being connected to form a rotatable structure via a joint mechanism, wherein a limit member is provided on the joint mechanism to limit the rotation adjustment range of the backrest, and wherein: The connecting part of the backrest and the seat frame and the limiting part of the joint mechanism are covered by the protective cover.

2. The shielded back adjustable chair of claim 1, wherein: The protective cover is made of plastic material, and a support strip and a side blocking strip are arranged on the inner surface and the side surface of the protective cover respectively.

3. The shielded back adjustable chair of claim 2, wherein: The bottom surface of the cover plate in the middle part of the protective cover is provided with a skeleton in a cross structure.

4. The shielded back adjustable chair of claim 1, wherein: The foot support is of a lifting type structure, and includes fixed foot supports and movable foot pipes.

5. The shielded back adjustable chair of claim 4, wherein: The outer surface of the synchronous rod is sleeved with a protective pipe, and the two ends of the protective pipe are welded with the two movable foot pipes respectively.

6. The shielded back adjustable chair of claim 1, wherein: The bottom of the seat frame is provided with a foot support frame extending forward, and the foot support is installed through the foot support frame.

7. The shielded back adjustable chair of claim 6, wherein: The front ends of the foot support frame are provided with shaft parts, and the inner side of the shaft part is provided with a protruding limiting block.

8. The shielded back adjustable chair of claim 1, wherein: The tail part of the foot support is provided with a shaft seat matched with the shaft part, and the shaft seat has a shaft hole.

9. The shielded back adjustable chair of claim 1, wherein: The outer side of the shaft seat is provided with a rotating groove matched with the limiting block. The rotating groove is provided with a stop block to limit the position of the limiting block. The backrest is installed through a fixed pipe, and the fixed pipe is connected with a shaft pipe. The shaft pipe is movably assembled with the joint mechanism of the seat frame, and the shaft pipe is covered by the protective cover.

Images