Height-adjustable chair
By designing a height-adjustable chair and using a combined structure of frame, seat unit, front connector and rear connector, the shortcomings in the prior art in terms of chair comfort and space saving are solved, achieving easy conversion and space saving of chairs between dining and rest modes.
Patent Information
- Application Number
- CN202380076191.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-10-31
- Filing Date
- 2023-10-30
- Publication Date
- 2025-06-10
AI Technical Summary
The chairs in the prior art have shortcomings in terms of comfort and space saving. Users need to do a lot of work to adjust the seating mode of the chair, and it is bulky when switching between different modes, making it difficult to achieve the purpose of saving space.
A height-adjustable chair is designed, adopting a combined structure of frame, seat unit, front connector and rear connector. Through the cooperation of the front connector and rear connector, the chair can be smoothly converted between dining mode and rest mode. The front connector has pivot arms and the rear connector includes a chute, which has an inclined design that increases comfort and stability.
The chair is easily converted between the two modes of dining and rest, ensuring the user's comfort in the two sitting modes, and the space occupied by the dining mode or rest mode is basically the same, achieving the purpose of saving space.
Smart Images
Figure CN120129476A_ABST
Abstract
Description
Technical Field
[0001] The present invention generally relates to a highly adjustable chair. Background Art
[0002] Smaller living spaces and the need for more comfortable home living have become an important part of modern society. Due to the increasing demand for space-saving furniture, there have been many attempts over the years to provide such furniture. For example, in the case of seating furniture such as chairs, there have been various options where the chair can be adjusted between different configurations that are more or less suitable for different uses.
[0003] However, these designs tend to be less comfortable, and users often need to perform a lot of work, such as rotating and folding different parts of the chair, to move from one sitting position mode to another. In addition, when the chair is switched between different modes, such as between an upright sitting position and a more relaxed lying position, the examples in the prior art tend to be bulky and sometimes even fail to achieve the purpose of saving space. It can be seen that there is room for improvement in such chairs. Summary of the Invention
[0004] The object of the present invention is to solve or at least mitigate the problems associated with the prior art. The object of the present invention is achieved by the technology set forth in the appended independent claims; the preferred embodiments are defined in the relevant dependent claims.
[0005] On the one hand, a highly adjustable chair is provided. The highly adjustable chair includes a frame, a seat unit, at least one front connector connecting the front part of the seat unit to the front part of the frame, and at least one rear connector connecting the rear part of the seat unit to the rear part of the frame. The rear connector includes a sliding groove.
[0006] Generally speaking, the present invention can be described as a highly adjustable chair that can be configured between a dining mode and a rest mode. The advantage of this highly adjustable chair is that it is a comfortable and durable option for modern seating furniture. It saves costs, is easy to use, and is simple to manufacture and transport for both manufacturers and customers. In addition, the space occupied is basically the same whether in the dining mode or the rest mode.
[0007] In one embodiment, the front connector of the highly adjustable chair has a pivot arm. The front connector is a rather simple structure, which helps the highly adjustable chair to switch between two seating modes (also referred to herein as a dining position and a rest position).
[0008] In one embodiment, the height - adjustable chair has two front connectors and / or two rear connectors. The two front connectors connect each side of the seat unit to the corresponding front side of the frame, and the two rear connectors connect each side of the seat unit to the corresponding rear side of the frame. In this way, the seat unit can be firmly connected to the frame. The front connectors and the rear connectors work together to enable the height - adjustable chair to switch between a dining position and a resting position.
[0009] In one embodiment, the pivot arm has a first end pivotable relative to the frame and a second end pivotable relative to the seat unit. The pivot arm is preferably pivotable between a substantially upright position and a lowered position, which respectively correspond to the dining position and the resting position of the height - adjustable chair.
[0010] In one embodiment, the pivot arm is arcuate. The advantage of this is that the curved shape can prevent the user from being pinched by the pivot arm because it always covers the gap that originally existed between the pivot arm and the seat unit. In addition, through the above - mentioned arc, the structure of the pivot arm and the overall height - adjustable chair can be made more stable.
[0011] In one embodiment, a chute is provided in the seat unit.
[0012] The chute is preferably inclined relative to the vertical axis so that the seat unit can also achieve a horizontal movement when moving from one position to another. In addition, the inclination of the chute can increase comfort and provide an ergonomic backrest.
[0013] In one embodiment, the rear connector further includes a rod arranged to slide in the chute.
[0014] In one embodiment, the rear connector further includes a sliding member arranged to slide in the said chute. In this case, the sliding member can be a rod.
[0015] In one embodiment, the chute has an upper end and a lower end. The upper end defines the lowered position of the seat unit relative to the frame, and the lower end defines the raised position of the seat unit relative to the frame.
[0016] In one embodiment, the upper end of the chute is arranged behind the lower end of the chute. This further indicates that the chute is inclined relative to the seat unit.
[0017] Furthermore, the seat unit may include a seat portion and a backrest. The backrest is preferably rigidly connected to the seat portion. The advantage of this is that the seat unit is easy to manufacture and easy to disassemble and store before final assembly. In addition, when the seat portion and the backrest are fixed together to form the seat unit, the height - adjustable chair is easier to operate because there is no need to fold different components.
[0018] In one embodiment, when the seat unit moves from the raised position to the lowest position, it tilts backward.
[0019] The effect of the inclination of the chute and the inclination of the rod sliding therein is that when converting between the dining position and the rest position, the seat unit is arranged such that the angle between the seat part and the backrest is the same, which means that the user will feel comfortable in both sitting postures.
[0020] In one embodiment, the bottom end of the chute is J-shaped. The advantage of the J-shape is that the height-adjustable chair can be fixed in different positions, thus preventing accidental conversion from the dining position to the rest position.
[0021] In one embodiment, the frame includes a plurality of front legs and rear legs and a crossbar extending horizontally between the front legs. This crossbar increases the stability of the frame structure.
[0022] In one embodiment, when the seat unit is arranged in the lowest position, the crossbar forms a support for the front part of the seat unit. In this way, when the height-adjustable chair is in the rest position, the front part of the seat unit will not continue to move downward. In other words, the front crossbar can ensure safety is not endangered. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] By way of example, embodiments of the present invention will now be described with reference to the accompanying drawings, in which:
[0024] Figure 1 is an isometric view of the height-adjustable chair in the raised position,
[0025] Figure 2 is Figure 1 an isometric view of the height-adjustable chair shown, but in the lowest position,
[0026] Figure 3 is Figure 1 a side view of the height-adjustable chair shown,
[0027] Figure 4 is Figure 2 a side view of the height-adjustable chair shown,
[0028] Figure 5 is Figure 1 and Figure 2 an isometric view of the front connector of the height-adjustable chair in
[0029] Figure 6 is Figure 5 an isometric view of the front connector shown, here showing the side facing the frame part of the height-adjustable chair,
[0030] Figure 7 is Figure 1 andFigure 2 Side view of the rear connector of a chair with medium and high adjustability
[0031] Figure 8 Isometric view of the front connector in the upper position, which position defines the raised position of the seat unit relative to the frame
[0032] Figure 9 Isometric view of the front connector in the bottom position, which position defines the lowest position of the seat unit relative to the frame
[0033] Figure 10 Isometric view of the rear connector in the bottom end position, which position defines the raised position of the seat unit relative to the frame, and
[0034] Figure 11 Isometric view of the rear connector in the upper end position, which position defines the lowest position of the seat unit relative to the frame Detailed implementation
[0035] See Figures 1-4 , which shows an adjustable-height chair 1. The adjustable-height chair 1 can be at Figure 1 , 3 shown dining position and Figure 2 , 4 shown rest position. The conversion of the chair between these two positions is achieved through the cooperation between the front connector 30 and the rear connector 40, which will be described in more detail below
[0036] The adjustable-height chair 1 includes a frame 10 and a seat unit 20. In addition, the adjustable-height chair 1 also includes a front connector 30 and a rear connector 40. There can be at least one front connector 30 and at least one rear connector 40. In the embodiments disclosed herein, there are two front connectors 31, 32 and two rear connectors 41, 42. The front connectors 31, 32 connect the front part 21 of the seat unit 20 and the front part 11 of the frame 10, and the rear connectors 41, 42 connect the rear part 22 of the seat unit 20 and the rear part 12 of the frame 10. The frame 10 is fixed, that is, there are no moving parts. The seat unit 20 itself is preferably also stationary, although it can move relative to the frame. In other words, the conversion between the dining position and the rest position can be achieved through the front connector 30 and the rear connector 40
[0037] In the figure, the frame 10 consists of two parallel and spaced-apart frame elements corresponding to the left and right sides of the height-adjustable chair 1 respectively. Each frame element can be understood as having corresponding front legs 13, 14 and rear legs 15, 16, with an armrest in between that connects the front and rear legs to each other. The front crossbar 17 is connected to the right front leg 13 and the left front leg 14 of the frame 10 and extends horizontally therebetween. Correspondingly, the rear crossbar 18 is connected to the right rear leg 15 and the left rear leg 16 of the frame 10 and extends horizontally therebetween. The crossbars 17, 18 hold the frame elements together.
[0038] The front crossbar 17 is preferably located directly below the front part 21 of the seat unit 20. In this embodiment, the front crossbar 17 can be regarded as a mechanical stop when the seat unit 20 is in the lowest position. Thus, in this case, the front crossbar 17 can help prevent the front part 21 of the seat unit 20 from moving further down when the height-adjustable chair is in the rest position. In other words, the front crossbar 17 ensures safety is not endangered. The front crossbar 17 also abuts against the stoppers 39 of the front connectors 31, 32, see Figure 6 . Of course, other frame designs can also be adopted without departing from the spirit of the present invention.
[0039] Preferably, the front part 21 and the rear part 22 of the seat unit 20 are integrated as a whole. However, the front part 21 and the rear part 22 of the seat unit 20 can also be two separate components and can be fixed together as a whole. In the embodiment described herein, the seat unit 20 has a seat part 27 and a backrest 28 connected to the seat part 27. The advantage of this is that the seat unit 20 is easy to manufacture and easy to disassemble and store before final assembly. In addition, when the seat part 27 and the backrest 28 are fixed together to form the seat unit 20, the height-adjustable chair 1 is easier to operate since there is no need to fold different components. To improve the user's comfort, the seat unit 20 can also have a covering layer.
[0040] As described above, the height-adjustable chair 1 includes two front connectors in the form of a right front connector 31 and a left front connector 32, and two rear connectors in the form of a right rear connector 41 and a left rear connector 42. The right front connector 31 and the right rear connector 41 are both arranged on the right side of the height-adjustable chair 1. Correspondingly, the left front connector 32 and the left rear connector 42 are arranged on the left side of the height-adjustable chair 1. The right front connector 31 connects the right front side 23 of the seat unit 20 to the right front leg 13 of the frame 10, and the left front connector 32 connects the left front side 24 of the seat unit 20 to the left front leg 14 of the frame 10. Correspondingly, the right rear connector 41 connects the right rear side 25 of the seat unit 20 to the right rear leg 15 of the frame 10, and the left rear connector 42 connects the left rear side 26 of the seat unit 20 to the left rear side 16 of the frame.
[0041] Figure 5 shows a side of the right front connector 31 configured to face the right front side 23 of the seat unit 20. The right front connector 31 can also be understood as the right pivot arm 33. Alternatively, the right front connector 31 is understood to include the right pivot arm 33. The first end 35 of the right pivot arm 33 is pivotally connected to the right front leg 13 of the frame 10, and the second end 36 is pivotally connected to the right front side 23 of the seat unit 20. In Figure 5 it shows an installation area 50 near the first end 35 of the right pivot arm 33, and the protrusion 52 (see Figure 6 , the reverse side view of the corresponding mirror front connector 32) passes through this area to connect the first end 35 of the right pivot arm 33 to the right front leg 13 of the frame 10. Similarly, in another installation area near the second end 36 of the right pivot arm 33, such as the opening 54, it provides space for the base support 29 of the seat portion 27, thereby connecting the second end 36 of the right pivot arm 33 to the right front side 23 of the seat unit 20 (see Figure 8 and Figure 9 ). A stopper 39 is also provided near the opening 54 at the second end 36 of the right pivot arm 33. As described above, when the seat unit 20 is lowered, the stopper 39 is configured to abut against the front crossbar 17. It can be understood that this pivot arm can work properly without the stopper 39.
[0042] Figure 6 shows a side of the left front connector 32 configured to face the left front leg 14 of the frame 10. The left front connector 32 can also be understood as the left pivot arm 34. Alternatively, the left front connector 32 is understood to include the left pivot arm 34. The first end 37 of the left pivot arm 34 is pivotally connected to the left front leg 14 of the frame 10, and the second end 38 is pivotally connected to the left front side 24 of the seat unit 20. Similar to Figure 5 , Figure 6 there is also an opening (not shown) at a position near the first end 37 of the left pivot arm 34. The protrusion 52 connects the first end 37 of the pivot arm 34 to the left front leg 14 of the frame 10. Similarly, another opening 56 near the second end 38 of the left pivot arm 34 provides space for the base support 29 of the seat portion 27, thereby connecting the second end 38 of the left pivot arm 34 to the left front side 24 of the seat unit 20 (see Figure 8 and Figure 9 ). A stopper 39 as shown in Figure 5 is also provided at the opening 56 adjacent to the second end 38 of the left pivot arm 34, but it is not shown as a protrusion (because Figure 6 shows the Figure 5 connector on the opposite side).
[0043] In other words, the first ends 35, 37 of the pivot arms 33, 34 and the second ends 36, 38 are pivotally connected to the frame 10 and the seat unit 20 respectively. In other words, the front part 21 of the seat unit 20 is pivotally connected to the right front side 13 and the left front side 13 of the frame 10 at corresponding pivot points through the front connectors 31, 32. The front connectors 31, 32 can also be regarded as pivot hinges and can rotate between a substantially upright position and a lowered position, and these two positions correspond to the dining position and the resting position of the height-adjustable chair 1 respectively. The pivot arms 33, 34 of the front connectors 31, 32 preferably have a curved shape or an arc shape to prevent the user from pinching fingers. In this way, the downward force received by the front connectors 31, 32 in the upright position will be offset by this shape. Therefore, the structure becomes stable through the arc design.
[0044] Now look at Figure 7 , which shows the left rear connector 42. The left rear connector 42 has a left chute 44 that extends between the upper end 47 and the lower end 48 of the chute 44. The left chute 44 can also be understood as a longitudinally extending recess. As Figure 10 and Figure 11 shown, the left chute 44 related to the left rear connector 42 is located at the left rear side 26 of the seat unit 20.
[0045] It should be noted that the rear connector 40 also includes a corresponding right rear connector 41, see Figures 1-4 . The right rear connector 41 has a right chute 43 that extends between the upper end 45 and the lower end 46 of the chute 43. For symmetry considerations, the shape of the right chute 43 is Figure 7 the mirror image of the left chute 44 shown in Figures 1-4 . As
[0046] shown, the right chute 43 is located at the right rear side 25 of the seat unit 20.
[0047] Openings 60, 62 are located near the upper ends 45, 47 and the lower ends 46, 48 of the rear connectors 41, 42. Fixing means, such as screws or bolts, can be inserted through these openings 60, 62 to fix the corresponding rear connectors 41, 42 on the corresponding rear sides 25, 26 of the seat unit 20.
[0048] The sliding member 49 is arranged to slide in the chutes 43, 44 of the left and right rear connectors 41, 42 respectively, which are located between the upper ends 45, 47 and the lower ends 46, 48. The sliding member 49 is preferably a protruding part, such as a rod 49. Figure 10 and Figure 11The middle part extends between the rear connectors 41, 42 in the form of a rod 49, preferably passing through the backrest 28 of the height - adjustable chair 1. In the embodiments disclosed herein, the sliding member 49 is fixedly connected to the rear part 12 of the frame 10. Thus, the rod 49 is fixedly connected to the rear part 12 of the frame 10. The rod 49 can be regarded as a protruding spike - like member, which is connected to the frame 10 and is configured to move in the sliding grooves 43, 44 of the rear connectors 41, 42. Optionally, the rod 49 does not extend from one side of the frame to the other side. The rod 49 can also be a spike - like member provided on the corresponding rear legs 15, 16 of the frame 10 and is configured to slide in the corresponding sliding grooves 43, 44 of the rear connectors 41, 42. In other words, the sliding member 49 can be provided on the corresponding rear legs 15, 16 of the frame 10 and is configured to slide in the corresponding sliding grooves 43, 44 of the rear connectors 41, 42.
[0049] The rear connectors 41, 42, especially the sliding grooves 43, 44, are inclined at an angle α with respect to the vertical axis A. The vertical axis A is defined as the axis extending perpendicularly with respect to the seat 27. The range of the angle α is 0 - 45°, preferably 10 - 20°. When the height - adjustable chair 1 is switched between the rest position and the dining position, the angle α remains unchanged. Therefore, when in the switched position, there is no need to adjust the inclination of the backrest 28 with respect to the seat 27. In addition, due to the existence of the inclined angle α, the backrest can maintain an ergonomic shape in both positions.
[0050] The upper ends 45, 47 of the sliding grooves 43, 44 define the lowered position of the seat unit 20 with respect to the frame 10. Correspondingly, the bottom ends 46, 48 define the raised position of the seat unit 20 with respect to the frame 10. The upper ends 45, 47 of the sliding grooves 43, 44 are arranged behind the bottom ends 46, 48 of the sliding grooves 43, 44 with respect to the front part of the height - adjustable chair, that is, behind the front part 11 of the frame 10. In other words, the backrest 28 is located behind the seat 27 of the seat unit 20. The bottom ends 46, 48 of the sliding grooves 43, 44 are preferably formed in a curved shape in some way. For example, the bottom ends 46, 48 can be J - shaped or hook - shaped. Figure 7 This is schematically illustrated. The advantage of the J - shape is that the height - adjustable chair can be fixed in different positions, thus preventing accidental switching from the dining position to the rest position.
[0051] As Figure 7 shown, the sliding member 49 is arranged in the sliding groove 44 of the rear connector 42. The sliding member 49 can slide along the sliding groove 44 in the rear connector 42 from the upper end 47 to the bottom end 48, or vice versa. The sliding movement of the sliding member 49 in the sliding groove 44 provides the adjustment of the height - adjustable chair 1 between the rest position and the dining position, which will be described in detail below.
[0052] The following will be combined with Figures 8-9and Figures 10-11 The operation mode is described, Figures 8-9 showing different positions of the front connector, Figures 10-11 showing different positions of the rear connector.
[0053] Starting from the rest position, the user lifts the backrest 28 upward and slightly backward, and the height-adjustable chair 1 enters the upper dining position. Since the backrest 28 can slide relative to the frame 10, excessive force is not required. This lifting action triggers the sliding member 49 (shown in the form of a rod 49) to move towards the J-shaped bottom ends 46, 48 of the chutes 43, 44, and triggers the second ends 36, 38 of the pivot arms 33, 34 to move to the upright position. Once the rod 49 reaches the lower end of the J shape, the backrest 28 is lowered so that the rod 49 abuts against the ends of the chutes 43, 44. Conversely, when the user slightly lifts the backrest 28 past the J shape, the height-adjustable chair 1 enters the lowered rest position, and then the backrest 28 is pushed downward. This in turn triggers the rod 49 to move to the upper ends 45, 47 of the chutes 43, 44, and triggers the first ends 35, 37 of the pivot arms 33, 34 to move to their lowered positions. In the dining position of the height-adjustable chair 1, the seat unit 20 is in the raised position, while in the rest position of the height-adjustable chair 1, the seat unit 20 is in the lowest position.
[0054] One of the main advantages of the height-adjustable chair 1 described herein is that it can be easily switched between the two functional positions of dining and resting. When the rod 49 is located at the J-shaped ends 46, 48 of the rear connectors 41, 42 and the front connectors 31, 32 are lifted to the upright position, the height-adjustable chair 1 is in the comfortable dining position. Conversely, when the rod 49 is moved to the upper ends 45, 47 of the rear connectors 41, 42 and the front connectors 31, 32 are lowered to their lowered positions, the height-adjustable chair 1 is in the comfortable rest position, and the angle α between the seat portion 27 and the backrest 28 is the same.
[0055] In summary, by slightly lifting the backrest 28, the front connector 30 and the rear connector 40 cooperate with each other to achieve a smooth transition from the rest position to the dining position. In addition, when the seat unit 20 moves from the raised position to the lowest position, the seat unit 20 tilts backward. This is due to the cooperation between the front connector 30 and the rear connector 40. This tilting is automatic, and the user will always sit in a comfortable position.
[0056] It should be further noted that the rear connectors 41 and 42 can be equipped with intermediate stoppers, such as hooks or "J-shaped members" arranged in the middle between the end positions, so that the seat unit 20 has more than two positions relative to the frame 10.
Claims
1. A height - adjustable chair (1), comprising a frame (10), a seat unit (20), at least one front connector (30) connecting the front part (21) of the seat unit (20) to the front part (11) of the frame (10), and at least one rear connector (40) connecting the rear part (22) of the seat unit (20) to the rear part (12) of the frame (10). Wherein, the rear connector (40) includes sliding grooves (43, 44), and, wherein, the front connector (30) includes pivot arms (33, 34) having a first end (35, 37) pivotable relative to the frame (13, 14) and a second end (36, 38) pivotable relative to the seat unit (23, 24).
2. The height - adjustable chair (1) according to claim 1, comprising two front connectors (31, 32) and / or two rear connectors (41, 42), the two front connectors connecting each side of the seat unit (23, 24) to the corresponding front side of the frame (13, 14), and the two rear connectors (41, 42) connecting each side of the seat unit (25, 26) to the corresponding rear side of the frame (15, 16).
3. The height - adjustable chair (1) according to claim 1 or 2, wherein the pivot arms (33, 34) are arcuate.
4. The height - adjustable chair (1) according to any one of the preceding claims, wherein the sliding grooves (43, 44) are provided in the seat unit (25, 26).
5. The height - adjustable chair (1) according to any one of the preceding claims, wherein the sliding grooves (43, 44) are inclined relative to the vertical axis (A).
6. The height - adjustable chair (1) according to any one of the preceding claims, wherein the rear connector (41, 42) further includes a sliding member (49) arranged to slide in the sliding grooves (43, 44).
7. The height - adjustable chair (1) according to claim 6, wherein the sliding member (49) is a rod.
8. The height - adjustable chair (1) according to any one of the preceding claims, wherein the sliding grooves (43, 44) have an upper end (45, 47) and a lower end (46, 48), the upper end defining the lowered position of the seat unit (20) relative to the frame (10), and the lower end defining the raised position of the seat unit (20) relative to the frame (10).
9. The height - adjustable chair (1) according to claim 8, wherein the upper end (45, 47) of the sliding grooves (43, 44) is arranged behind the lower end (46, 48) of the sliding grooves (43, 44).
10. The height - adjustable chair (1) according to claim 8 or 9, wherein the lower end (46, 48) of the sliding grooves (43, 44) is J - shaped.
11. The height - adjustable chair (1) according to any one of the preceding claims, wherein the frame (10) includes a plurality of front legs (13, 14) and rear legs (15, 16) and a cross - bar (17) extending horizontally between the front legs (13, 14).
12. The height-adjustable chair (1) according to claim 11, wherein when the seat unit (20) is arranged in the lowest position, the crossbar (17) forms a support for the front part (21) of the seat unit (20).
13. The height-adjustable chair (1) according to any one of the preceding claims, wherein the seat unit (20) comprises a seat part (27) and a backrest (28) rigidly connected to the seat part (27).
14. The height-adjustable chair (1) according to any one of the preceding claims, wherein when the seat unit (20) moves from the raised position to the lowest position, the seat unit (20) tilts backward.