An adaptive reclining seat

Abstract

The utility model discloses a self -adaptation reclining chair, including base, seat, chair back, base both sides symmetry is equipped with the handrail, and the seat is located above base and is between two handrails, wherein the chair back is set up with the linkage lever articulated with handrail, seat between and between the handrail sets up the reclining guide structure, and the reclining guide structure includes the guide groove set up on one of seat and handrail, and the fixed setting of sliding connector on the other of seat and handrail, by rear to front, the guide groove is inclined and extends to the front upper side, sliding connector is connected in the guide groove slidingly, when the chair back rotates back, can pass through the linkage lever and the self -adaptation reclining structure linkage seat and move greatly to the front upper side, has reduced the rubbing back feeling of chair back to back, makes the gravity of seat when the chair back leans back not too much rear shift, also makes seat to the position of upper leg form lifting support, is more in line with ergonomics, has improved the use experience and comfortable feeling of seat significantly.

Description

Technical Field

[0001] This utility model relates to the field of seating, and in particular to an adaptive tilting seat. Background Technology

[0002] Most existing lounge chairs or ergonomic chairs have backrests that are rotatably connected to the seat, thus providing a tilting function that allows for forward and backward rotation. This supports the back of the occupant in an upright or reclining position, accommodating both those in a sitting position and those in a reclining resting position.

[0003] However, this type of chair still has shortcomings in terms of user experience and comfort. First, due to the height difference between the rotation center of the chair back and the rotation center of the human back, the back slides relative to the chair back when the chair back rotates backward, creating a strong "back-rubbing" sensation that causes back discomfort. Second, when the chair back rotates backward at a large angle, the center of gravity of the entire chair also shifts backward, making it easy for the chair to tip over due to instability. In addition, according to human sitting habits, when a sitter leans back, their thighs tend to move upward. At this time, the chair back rotates backward to support the back, but the seat remains stationary, leaving the thighs in a suspended state, affecting sitting comfort and not conforming to ergonomics. Summary of the Invention

[0004] This utility model provides an adaptive tilting seat, wherein a linkage rod is provided between the backrest and the seat, and is hinged to the armrests and the seat. A tilting guide structure is provided between the seat and the armrests, so that when the backrest is rotated backward, the seat can be moved forward and upward in a large manner, reducing the backrest's rubbing sensation on the back, preventing the center of gravity of the seat from shifting too far backward when the backrest is tilted back, and also providing lifting support for the thighs. This is more ergonomic and significantly improves the user experience and comfort of the seat.

[0005] The technical solution of this utility model is implemented as follows: An adaptive tilting seat includes a base, a seat, and a backrest. Armrests are symmetrically arranged on both sides of the base, and the seat is located above the base and between the two armrests. Linkage rods are symmetrically arranged on both sides of the backrest. Each linkage rod is hinged to a corresponding armrest to form a first hinge end, and each linkage rod is hinged to the seat to form a second hinge end offset from the first hinge end. A tilting guide structure is provided between each armrest and the seat. The tilting guide structure includes a guide groove provided on one of the seat and armrests, and a sliding connector fixedly provided on the other of the seat and armrest. From back to front, the guide groove extends obliquely upwards and forwards; the sliding connector is slidably connected within the guide groove. When the chair back is subjected to a backward leaning force, the linkage rod rotates backward along the first hinge end and slides in the guide groove in conjunction with the sliding connector, so that the chair seat moves forward and upward synchronously from the initial position.

[0006] Preferably, the chair seat includes a seat support and side connecting plates symmetrically arranged on the seat support. The guide groove is provided on the armrest, the corresponding linkage rod is hinged to the side connecting plate, and the sliding connector is fixed to and slidably connected to the corresponding side connecting plate in the guide groove.

[0007] Preferably, the chair also includes an elastic reset member, which is configured to provide elastic force to the backrest and seat by its own elastic deformation after the chair back is rotated backward, so that the seat and backrest can support the occupant in both upright and reclining positions.

[0008] Preferably, at least one of the two handrails is provided with the elastic reset member between itself and the corresponding sliding connector; or, at least one of the two handrails is provided with the elastic reset member between itself and the corresponding linkage rod.

[0009] Preferably, the elastic reset element is a mechanical spring or a gas spring.

[0010] Preferably, the elastic reset element is a normally closed gas spring disposed between the handrail and the corresponding sliding connector. The normally closed gas spring includes a cylinder and a piston rod slidably connected to the cylinder. The piston rod always has a tendency to elastically retract into the cylinder. Alternatively, the elastic reset element is a tension spring disposed between the sliding connector and the handrail.

[0011] Preferably, the elastic reset component is a self-locking gas spring with a built-in locking device. The locking device is connected to a pull cable, and a control switch exposed on the seat or armrest is connected to the pull cable. Unlocking or locking of the chair back and seat can be completed without the need for a separate locking control mechanism.

[0012] Preferably, at least one of the two armrests is provided with a gear control structure between itself and the corresponding linkage rod. The gear control structure includes multiple gear holes spaced circumferentially on the linkage rod and a locking member movably connected to the armrest. The locking member can be inserted into or disengaged from the corresponding gear hole under external force, so that the chair back can switch between a locked state and a free rotation state to adapt to the different usage needs of the occupant and make the function of the seat more diversified.

[0013] Preferably, the guide groove extends through the left and right sides of the handrail, and the sliding connector includes a sliding body slidably connected in the guide groove and limiting parts protruding from both sides of the sliding body. The two limiting parts abut against the left and right sides of the corresponding handrail, respectively, to prevent the sliding connector from detaching from the guide groove.

[0014] Preferably, a drag-reducing bushing is provided in the guide groove between the outer wall of the sliding connector and the inner wall of the guide groove to improve the smoothness of sliding between the sliding connector and the guide groove.

[0015] The beneficial effects of this utility model, which adopts the above technical solution, are as follows: This invention hinges the linkage rod connected to the backrest to the armrest, providing a rotational support point for the backrest's forward and backward rotation. The linkage rod is also hinged to the seat, so that when the linkage rod rotates backward, it creates a linkage effect on the seat. Simultaneously, to guide the seat's movement, a tilting guide structure consisting of a sliding connector and a guide groove extending forward and upward is provided between the armrest and the seat. This allows the seat to move significantly forward and upward when the backrest is tilted back, enhancing the linkage effect between the backrest and the seat and effectively reducing the rubbing sensation on the back. Furthermore, the forward and upward movement of the seat ensures that the center of gravity of the seat does not shift excessively backward, and also provides a floating support effect for the thighs, effectively improving the stability and comfort of the seat and making it more ergonomic.

[0016] The lever and armrest control structure allows the backrest to be locked in either an upright or tilted position according to the occupant's needs, keeping both the backrest and seat locked. It can also be switched to a free tilting state, further enriching the seat's functionality and range of use.

[0017] When the elastic reset component is a self-locking gas spring with a self-locking device, the user can directly control the extension or locking of the gas spring piston rod through the control switch, without the need for a separate locking control mechanism, so that the seat and backrest can switch between the locked state and the free tilt linkage state. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of an adaptive tilt seat; Figure 2 A side view of the adaptive tilt seat with the backrest upright; Figure 3 A schematic diagram of the adaptive tilting seat when the backrest is tilted and rotated. Figure 4 A side view of the adaptive tilt seat when the backrest is rotated; Figure 5 An exploded view of an adaptive tilt seat; Figure 6 This is a simplified sectional view of the gear control structure. Figure 7 This is an exploded view of the sliding connector. Figure 8 This is a schematic diagram showing that the elastic reset element is a tension spring; Figure 9 This is a schematic diagram of the elastic reset component disposed between the linkage rod and the handrail in Embodiment 2; Figure 10 This is a schematic diagram of a self-locking gas spring as the elastic reset component in Example 3; The reference numerals in the attached drawings are as follows: 1-base, 2-seat, 21-side connecting plate, 3-armrest, 31-guide groove, 4-backrest, 5-linkage rod, 51-first connecting part, 52-second connecting part, 6-elastic reset part, 7-position hole, 71-positioning hole, 72-locking part, 73-mounting seat, 8-drag reducing bushing, 9-sliding connecting part, 91-sliding body, 92-limiting part, 911-mounting screw hole, 912-connecting screw hole. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0021] This utility model has several specific embodiments, and the specific implementation methods are as follows: Example 1: As Figure 1-8 As shown, this embodiment provides an adaptive tilting seat, including a base 1, a seat 2, and a backrest 4. Armrests 3 are symmetrically arranged on the left and right sides of the base 1. The seat 2 is located above the base 1 and between the two armrests 3. The base 1 shown in this embodiment includes a crossbar and a mounting bracket fixed to the middle of the crossbar. The mounting bracket has a socket for connecting to a lifting gas spring. The left and right ends of the crossbar extend forward and upward at an angle and then horizontally backward, forming a rod-shaped armrest support. Armrest boards are fixedly connected to the armrest support, and the armrest boards and armrest support constitute the armrests. In this embodiment, only the frame support structure of the backrest 4 and seat 2 is shown. The frame support structure can be covered with a support pad for comfortable sitting. Linkage rods 5 are symmetrically arranged on the left and right sides of the backrest 4. 5 includes a first connecting part 51 and a second connecting part 52 that are respectively connected to the backrest 4 and the armrest 3. The first connecting part 51 and the second connecting part 52 form an L-shaped linkage 5. The first connecting part 51 is fixedly connected to the backrest 4, and the second connecting part 52 is hinged to the corresponding armrest 3 to form a first hinge end. The second connecting part 52 of each linkage 5 is hinged to the seat 2 to form a second hinge end that is offset from the first hinge end. A tilting guide structure is provided between each armrest 3 and the seat 2. The tilting guide structure includes a guide groove 31 provided on one of the seat 2 and the armrest 3, and a sliding connector 9 fixedly provided on the other of the seat 2 and the armrest 3. From back to front, the guide groove 31 extends obliquely forward and upward. The sliding connector 9 is slidably connected in the guide groove 31. When the backrest 4 is subjected to a backward leaning force, the linkage rod 5 rotates backward along the first hinge end. At this time, the backrest 4 rotates backward and forms a linkage force on the seat 2 through the second hinge end. Under the guidance of the tilt guide structure, the sliding connector 9 slides in the guide groove 31, causing the seat 2 to move forward and upward synchronously from the initial position. This enhances the linkage between the backrest 4 and the seat 2, reduces the back rubbing sensation, and the forward and upward movement of the seat 2 prevents the center of gravity of the seat from being too far back. The seat 2 can also provide a floating support for the thighs, effectively improving the comfort of the seat and making the seat more ergonomic.

[0022] Furthermore, the armrest itself has a large area, which facilitates the setting of the guide groove 31. Therefore, in this embodiment, the guide groove 31 is preferably set on the armrest 3, and the sliding connector 9 is set on the seat 2, and this will be explained accordingly. Specifically, the seat 2 includes a seat support and side connecting plates 21 symmetrically arranged on the seat support. The seat support is a frame structure for laying a seat cushion. The side connecting plates 21 extend vertically. The linkage rod 5 is hinged to the corresponding side connecting plate 21. The guide groove 31 is set on the armrest of the armrest 3. After the sliding connector 9 is fixed to the corresponding side connecting plate 21, it is slidably connected in the guide groove 31 so that when the linkage rod 5 rotates backward, it can link the seat 2 to move forward and upward.

[0023] Furthermore, the seat also includes an elastic reset member 6, which is configured to provide elastic force to the backrest 4 and seat 2 by its own elastic deformation after the backrest 4 rotates backward; so that the seat 2 and backrest 4 can support the occupant in both upright and reclining positions; specifically, at least one of the two armrests 3 is provided with the elastic reset member 6 between it and the corresponding sliding connector 9; in this embodiment, only the structure of one armrest 3 with the corresponding sliding connector 9 is illustrated.

[0024] Specifically, the elastic reset element 6 is a mechanical spring or a gas spring; for example, the elastic reset element 6 can be a normally closed gas spring disposed between the handrail 3 and the corresponding sliding connector 9. The normally closed gas spring includes a cylinder and a piston rod slidably connected to the cylinder. The piston rod always has a tendency to elastically retract into the cylinder. Figure 3-5 As shown, during installation, the cylinder of the normally closed gas spring can be hinged to the rear of the handrail plate, so that the connection point between the cylinder and the handrail plate is located behind the sliding connector 9. Simultaneously, the piston rod can be hinged to the sliding connector 9 to prevent the piston rod from jamming during extension and retraction. Alternatively, the elastic reset element 6 can also be a tension spring located between the sliding connector 9 and the handrail 3. Figure 8As shown, during installation, hanging posts are set at the rear positions of the sliding connector 9 and the armrest, and the two ends of the tension spring are hooked onto the corresponding hanging posts respectively; when the backrest 4 is subjected to a leaning force and rotates backward, the elastic reset member 6 is subjected to the force of the sliding connector 9 and undergoes elastic deformation. After the backrest leaves the backrest 4, the elastic reset member 6 resets, so that the backrest 4 and the seat 2 return to their initial positions.

[0025] Furthermore, in this embodiment, the normally closed gas spring serving as the elastic reset element 6 can be replaced with a normally open gas spring. The normally closed gas spring includes a cylinder and a piston rod slidably connected within the cylinder. The piston rod always tends to elastically extend out of the cylinder. During installation, the cylinder of the normally open gas spring can be hinged to the front position of the handrail, so that the connection point between the cylinder and the handrail is located in front of the sliding connector 9. At the same time, the piston rod is hinged to the sliding connector 9 to prevent the piston rod from jamming during extension and retraction. Alternatively, the elastic reset element 6 can also be a compression spring disposed between the sliding connector 9 and the handrail 3. During installation, locking posts are provided at the front positions of the sliding connector 9 and the handrail, and the two ends of the compression spring are respectively fitted onto the corresponding locking posts; the same effect can also be achieved.

[0026] Furthermore, the elastic reset element 6 can also be a torsion spring (not shown) located at the first hinge end; specifically, the linkage rod 5 is rotatably connected to the armrest plate of the armrest 3 via a rotating shaft, the torsion spring can be sleeved on the rotating shaft, and the two elastic plates of the torsion spring act on the linkage rod 5 and the armrest plate respectively. The torsion spring can also elastically deform when the backrest 4 rotates backward, providing a reset elastic force for the seat 2 and the backrest 4.

[0027] Furthermore, if the guide groove 31 is set on the side connecting plate 21 of the seat 2 and the sliding connector 9 is fixed on the armrest 3, the sliding connector 9 provides sliding support for the seat 2 to move forward and upward. On this basis, the elastic reset component needs to be set between the seat 2 and the armrest 3 to provide reset elasticity for the seat 2 and the backrest 4.

[0028] Furthermore, if the gas springs in this embodiment are all free-type gas springs, free-type gas springs and mechanical springs can provide elastic restoring force to reset the seat 2 and backrest 4, but it is difficult to lock the backrest 4 in position. Therefore, when the user locks the backrest 4 in a predetermined position according to their own seating needs, it needs to be achieved through the gear control structure in this embodiment; specifically, such as Figure 1-2 , Figure 6As shown, at least one of the two armrests 3 is provided with a gear control structure between itself and the corresponding linkage rod 5. In this embodiment, it is preferable that each armrest 3 is provided with the gear control structure between itself and the corresponding linkage rod 5. The gear control structure includes a plurality of gear holes 7 provided on the linkage rod 5 and spaced circumferentially, and a locking member 72 movably connected to the armrest 3. The plurality of gear holes 7 are located at the intersection of the first connecting part 51 and the second connecting part 52. The locking member 72 can be inserted into or disengaged from the corresponding gear hole 7 under the action of external force, so that the backrest 4 can switch between a locked state and a free rotation state. This allows the seat to lock or unlock the backrest 4 according to the needs of the occupant, thus diversifying the functions of the seat.

[0029] Furthermore, the locking element 72 is slidably or rotatably connected to the armrest 3. In this embodiment, only the structure of the locking element 72 slidably connected to the armrest 3 is shown. Specifically, in this embodiment, the linkage rod 5 shown is located inside the armrest plate, and a mounting base 73 can be provided on the outer side of the armrest plate of the armrest 3. The locking element 72 is slidably connected to the mounting base 73. A positioning hole 71 corresponding to the gear hole 7 is provided through the armrest plate. When the backrest 4 is rotated to the predetermined position, the locking element 72 can be controlled to pass through the positioning hole 71 and insert into the corresponding gear hole 7 to complete the position locking of the backrest 4. When it is necessary to unlock the backrest 4, the locking element 72 can be controlled to disengage from the corresponding gear hole 7.

[0030] Furthermore, such as Figure 7 As shown, the sliding connection structure between the sliding connector 9 and the guide groove 31 is as follows: the guide groove 31 passes through the handrail 3 from left to right. The sliding connector 9 includes a sliding body 91 slidably connected within the guide groove 31 and limiting portions 92 protruding from both sides of the sliding body 91. The two limiting portions 92 respectively abut against the left and right sides of the corresponding handrail 3, preventing the sliding connector 9 from detaching from the guide groove 31. Specifically, the width of the sliding body 91 in the sliding connector 9 is basically matched with that of the guide groove 31. For ease of installation, the limiting portion 92 located on the inner side of the handrail 3 is integrally formed with the sliding body 91, and the limiting portion 92 located on the outer side of the handrail 3 is fixed to the sliding body 91 by screws. The sliding body 91 has a locking screw hole 911, and the limiting part 92 on the outer side of the armrest 3 has a through hole. The screw passes through the through hole and locks into the locking screw hole 911, so that the two limiting parts 92 abut against the inner and outer sides of the armrest 3. The cross-sectional shape of the sliding body 91 and the limiting part 91 on the inner side of the armrest 3 is T-shaped, and it is fixedly connected to the side connecting plate 21 of the seat 2 by screws. That is, the limiting part 92 on the inner side of the armrest 3 has a connecting screw hole 912, and the side connecting plate 21 has a corresponding through hole, so that the screw passes through the through hole and locks into the connecting screw hole 912, so that the sliding part 9 is fixedly connected to the side connecting plate 21.

[0031] Furthermore, in order to reduce the noise generated by the sliding connector 9 sliding in the guide groove 31 and improve its smoothness, a drag-reducing bushing 8 is provided in the guide groove 31 between the outer wall of the sliding connector 9 and the inner wall of the guide groove 31. The drag-reducing bushing 8 is made of plastic or rubber with a smooth inner wall and has a low coefficient of friction. It can separate the sliding body 91 from the inner wall of the guide groove 31 and ensure that the sliding connector 9 slides smoothly in the guide groove 31.

[0032] Example 2: Figure 9 As shown, the difference between this embodiment and the above embodiment lies in the different positions of the elastic reset member 6. Specifically, in this embodiment, the elastic reset member 6 is provided between at least one of the two armrests 3 and the corresponding linkage rod 5. The elastic reset member 6 can be a gas spring or a mechanical spring. For example, a tension spring or a normally closed gas spring can be provided between the second connecting part 52 and the armrest 3, or a compression spring or a normally open gas spring can be provided between the first connecting part 51 and the armrest 3. In this embodiment, only the structure of the tension spring being provided between the second connecting part 52 and the armrest 3 is illustrated. When the linkage rod 5 rotates backward, the elastic reset member 6 located between the linkage rod 5 and the armrest 3 can also elastically deform, providing a reset force for the backrest 4 and the seat 2, achieving the same effect as in the above embodiment.

[0033] Example 3: As Figure 10 As shown, the difference between this embodiment and the above embodiment is that the elastic reset member 6 is a self-locking gas spring with a built-in locking device. The locking device is connected to a pull wire 61, and a control switch 62 exposed on the seat 2 or armrest 3 is connected to the pull wire 61. Based on this, there is no need to set a separate locking control mechanism between the linkage rod 5 and the armrest 3. The piston rod can be locked or unlocked by pulling the pull wire through the control switch 62, thereby unlocking or locking the backrest 4 and the seat 2.

[0034] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An adaptive tilt seat, characterized in that, The chair includes a base (1), a seat (2), and a backrest (4). Armrests (3) are symmetrically arranged on the left and right sides of the base (1). The seat (2) is located above the base (1) and between the two armrests (3). Linkage rods (5) are symmetrically arranged on the left and right sides of the backrest (4). Each linkage rod (5) is hinged to the corresponding armrest (3) to form a first hinge end, and each linkage rod (5) is hinged to the seat (2) to form a second hinge end that is offset from the first hinge end. A tilting guide structure is provided between each armrest (3) and the seat (2). The tilting guide structure includes a guide groove (31) provided on one of the seat (2) and the armrest (3), and a sliding connector (9) fixedly provided on the other of the seat (2) and the armrest (3). From back to front, the guide groove (31) extends forward and upward at an angle. The sliding connector (9) is slidably connected in the guide groove (31). When the backrest (4) is subjected to a backward leaning force, the linkage rod (5) rotates backward along the first hinge end and the sliding connector (9) slides in the guide groove (31), so that the seat (2) moves forward and upward synchronously from the initial position.

2. The adaptive tilt seat according to claim 1, characterized in that: The seat (2) includes a seat support and side connecting plates (21) symmetrically arranged on the left and right sides of the seat support. The guide groove (31) is set on the armrest (3). The corresponding linkage rod (5) is hinged to the side connecting plate (21). The sliding connector (9) is fixed and slidably connected to the corresponding side connecting plate (21) in the guide groove (31).

3. The adaptive tilt seat according to claim 1, characterized in that: It also includes an elastic reset member (6), which is configured to provide elastic force to the backrest (4) and seat (2) by its own elastic deformation after the backrest (4) rotates backward.

4. The adaptive tilt seat according to claim 3, characterized in that: The elastic reset member (6) is provided between at least one of the two handrails (3) and the corresponding sliding connector (9); or, the elastic reset member (6) is provided between at least one of the two handrails (3) and the corresponding linkage rod (5).

5. The adaptive tilt seat according to claim 4, characterized in that: The elastic reset element (6) is a mechanical spring or a gas spring.

6. The adaptive tilt seat according to claim 5, characterized in that: The elastic reset component (6) is a normally closed gas spring disposed between the handrail (3) and the corresponding sliding connector (9). The normally closed gas spring includes a cylinder and a piston rod that is slidably connected to the cylinder. The piston rod always has the tendency to elastically retract into the cylinder. Alternatively, the elastic reset component (6) is a tension spring disposed between the sliding connector (9) and the handrail (3).

7. The adaptive tilt seat according to claim 5, characterized in that: The elastic reset component (6) is a self-locking gas spring with a built-in locking device. The locking device is connected to a pull wire (61), and a control switch (62) exposed on the seat (2) or armrest (3) is connected to the pull wire (61).

8. The adaptive tilt seat according to claim 1, 5, or 6, characterized in that: At least one of the two armrests (3) is provided with a gear control structure between it and the corresponding linkage rod (5). The gear control structure includes multiple gear holes (7) set on the linkage rod (5) and spaced along the circumference, and a locking member (72) movably connected to the armrest (3). The locking member (72) can be inserted into or disengaged from the corresponding gear hole (7) under the action of external force, so that the backrest (4) can switch between a locked state and a free rotation state.

9. The adaptive tilt seat according to claim 2, characterized in that: The guide groove (31) passes through the handrail (3) from left to right. The sliding connector (9) includes a sliding body (91) that is slidably connected in the guide groove (31) and a limiting part (92) that protrudes from both sides of the sliding body (91). The two limiting parts (92) abut against the left and right sides of the corresponding handrail (3) respectively.

10. The adaptive tilt seat according to claim 1, characterized in that: The guide groove (31) is provided with a drag-reducing bushing (8) located between the outer wall of the sliding connector (9) and the inner wall of the guide groove (31).

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