Multi-posture adjusting chair

Abstract

The utility model provides a multi-posture adjusting chair which comprises a chair seat and a back supporting assembly, the back supporting assembly comprises a back supporting frame and support supporting rods located on the two sides of the chair seat and arranged in a bilateral symmetry mode, and the back supporting frame comprises a middle portion and extending portions extending forwards from the two sides of the middle portion respectively. The extending parts extending forwards from the two sides of the back supporting frame are connected with the support supporting rods connected to the two sides of the seat in a front-back sliding mode in a sleeved mode, the extending parts of the back supporting frame can serve as armrests, and on the premise that the seat depth is adjusted through front-back sliding of the seat, height adjustment of the armrests can be achieved by moving the back support up and down; the use requirements of sitting persons with different body types are met, and the use experience feeling of the seat is improved.

Description

Technical Field

[0001] The utility model relates to the field of seats, in particular to a multi-posture adjustable chair. Background Art

[0002] In order to be suitable for sitters of different body types and meet different sitting needs, the seat depth of seats on the market is set as an adjustable structure. One of the design schemes is to make the backrest slide back and forth on the seat to adjust the seat depth.

[0003] For example, in the chair patent with the patent number 201620518208.7, the seat cushion support part includes a fixed chassis and a sliding chassis, and the backrest support part includes a keel bracket, a backrest and two longitudinal adjustment parts. Both sides of the keel bracket are connected to the sliding chassis through the two longitudinal adjustment parts. When operating the two longitudinal adjustment parts simultaneously, the backrest support part adjusts the seat depth as the sliding chassis moves back and forth, and the position is locked by the cooperation of the card holes arranged on the fixed chassis and the card teeth on the longitudinal adjustment parts.

[0004] This seat can adjust the seat depth by sliding the backrest support part, which is suitable for sitters of different body types. However, since the longitudinal adjustment parts are slidably connected to both sides of the seat cushion support part, this is equivalent to occupying the space for setting the armrests of the seat, making it difficult to set armrests that can be adjusted up and down on the seat. As a result, when sitters of different body types are sitting, their hands are always in a suspended state, affecting the sitting experience of the seat. Summary of the Invention

[0005] The purpose of the utility model is to overcome the deficiencies existing in the above-mentioned prior art, and provides a multi-posture adjustable chair. By sleeving the extension parts extending forward from both sides of the back support frame with the support rods that slide back and forth on both sides of the seat, the extension parts of the back support frame can serve as armrests. On the premise of ensuring the front-back sliding adjustment of the seat depth of the seat, moving the back support up and down can realize the height adjustment of the armrests, meeting the use requirements of sitters of different body types and improving the use experience of the seat.

[0006] The technical solution of the utility model is realized as follows:

[0007] A multi-posture adjustable chair, comprising a seat and a back support assembly. The back support assembly includes a back support frame and support struts symmetrically arranged on both sides of the seat. The back support frame includes a middle part and extending parts protruding forward from both sides of the middle part. The middle part is configured to connect to the backrest. At a position closer to the front of the extending part, a downward pillar is integrally formed. The pillar is sleeved with the support strut, and the pillar moves up and down relative to the support strut to adjust the height of the back support frame and stay at the corresponding position after adjustment. The support strut is slidably connected to the seat in the front-back direction to adjust the position of the back support frame relative to the seat and stay at the corresponding position after adjustment.

[0008] Preferably, the pillar is a hollow tubular structure, and the pillar is sleeved outside the support strut; alternatively, the support strut is a hollow tubular structure, and the pillar is inserted into the support strut. The sleeved or inserted structure between the pillar and the support frame is simple and convenient to operate.

[0009] Preferably, the support strut includes a vertical part and a horizontal part bent inward from the lower end of the vertical part. The horizontal part is slidably matched with the seat; the vertical part is a hollow tubular structure with an open upper end, and the pillar is inserted into the vertical part; the pillar and the support rod are hollow tube structures, which can reduce the weight of the seat and facilitate transportation.

[0010] Preferably, the extending part is a plate-like body. The extending part includes a vertical enclosing plate and a horizontal plate extending outward and turning from the upper edge of the enclosing plate. The enclosing plate and the horizontal plate together form an armrest convenient for the arm to lean on, and the upper surface of the horizontal plate forms a leaning surface; the pillar is integrally extended downward from the front part of the enclosing plate; the upper surface of the horizontal plate forms a leaning surface, enabling the user to place the arm more comfortably and reducing the pressure on the arm; moreover, the combined design of the enclosing plate and the horizontal plate makes the appearance of the armrest more beautiful and thinner; the design of the leaning surface also increases the overall visual attractiveness of the chair, making it look more fashionable and delicate.

[0011] Preferably, the pillar is a flat column with the same thickness as the enclosing plate, and the vertical part is also flat. A rectangular hole with an open upper end is formed on the vertical part, and the pillar is inserted and matched with the rectangular hole; the design of the pillar and the enclosing plate adopts a flat column and flat structure, making the entire extending part look more integrated and not occupying more lateral space; the design of the inserted and matched structure makes the connection between the pillar and the vertical part easy to disassemble and convenient for later maintenance.

[0012] Preferably, the surface of the pillar is provided with scales; the scales are convenient for the user to observe, enabling the sitter to move the pillar up and down to a predetermined position according to their own usage needs.

[0013] Preferably, the support strut is a hollow tubular structure, and the support column is inserted therein; an adjustment and locking mechanism is provided between the support column and the support strut. The adjustment and locking mechanism includes a screw rod, a sleeve sleeved between the inner sides of the support column and the support strut. The outer end of the screw rod is connected with a knob, and the other end of the screw rod is threadedly connected with the side wall of the support strut. When the support column moves up and down to a corresponding position, turn the knob to directly or indirectly act on the outer wall of the sleeve by the screw rod, so that the tube wall of the sleeve deforms and presses the support column, and then the support column stays at the corresponding position. The structure of the adjustment and locking mechanism is simple and easy to operate, so that the user can turn the knob to deform the sleeve, thereby locking the position of the support column.

[0014] Preferably, a groove is provided on the outer wall of the sleeve facing the end of the screw rod, and a gasket matching the size of the groove is provided in the groove. When turning the knob to lock the position of the support column, the end of the screw rod presses the gasket in the groove, and then the tube wall of the sleeve deforms and presses the support column. The groove can accommodate the gasket and reduce the thickness of the tube wall of the sleeve, making the sleeve easier to deform. The gasket can increase the acting area of the screw rod on the sleeve, making the extrusion force received by the support column more uniform and stable.

[0015] Preferably, the sliding fit between the transverse part and the seat means that sliding rods extending forward and backward are fixed on both sides of the seat. The sliding rods are arranged in a hollow manner, and the transverse part of the support strut is sleeved with the sliding rods so that the support strut can move back and forth relative to the sliding rods. A locking and adjusting mechanism is further provided between the support strut and the seat. The locking and adjusting mechanism includes a handle, a control pin and a locking groove. The locking groove is arranged on at least one side of the seat along the front-back direction. The handle is movably connected to the support strut, and the control pin is inserted into or disengaged from the locking groove in response to the action of the handle.

[0016] The beneficial effects of the present utility model adopting the above technical solutions are as follows:

[0017] The extension parts extending forward on both sides of the back support frame of the seat are sleeved with the support struts that slide back and forth on both sides of the seat, so that the extension parts of the back support frame can serve as armrests. At the same time, the back support frame can also slide back and forth to adjust the seat depth, enabling the seat to have both the seat depth adjustment function and the armrest lifting adjustment function. Thus, when sitting, the hands of sitters with different body types will not be suspended, improving the use experience of the seat. Description of the Drawings

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the seat;

[0019] Figure 2 It is a side view of the seat when the seat is at the maximum seat depth;

[0020] Figure 3 It is a side view of the seat when the seat is at the minimum seat depth;

[0021] Figure 4 It is a bottom view of the seat;

[0022] Figure 5 Schematic diagram of the connection between the seat and the support strut

[0023] Figure 6 Exploded schematic diagram of the connection relationship between the seat and the support strut

[0024] Figure 7 Schematic diagram of the connection relationship between the control pin and the support strut

[0025] Figure 8 Exploded schematic diagram of the locking adjustment mechanism

[0026] Figure 9 Schematic perspective view of the back support frame

[0027] Figure 10 Exploded schematic diagram of the back support frame and the support strut

[0028] Figure 11 Schematic perspective view of the sleeve

[0029] Figure 12 Rear view of the sleeve

[0030] Each reference numeral is as follows: backrest 1, back support frame 2, support strut 3, handle 4, seat cushion 5, seat 6, chair leg 7, locking groove 8, sliding rod 9, bushing 10, receiving groove 11, compression spring 12, control pin 13, knob 14, transverse portion 15, screw 16, through hole 17, overlapping portion 18, tooth 41, cover plate 4b, avoidance hole 41b, perforation 19, middle portion 2a, extension portion 2b, pillar 2c, sleeve 20, screw rod 21, gasket 22, enclosing plate 23, transverse plate 24, clamping hole 31, buckle 201, groove 202. Detailed implementation manners

[0031] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0032] Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0033] The specific implementation manners of the present invention are as follows:

[0034] As Figures 1-12As shown in the figure, the present utility model provides a multi-posture adjustable chair, which includes a seat 6 and a back support assembly. A seat cushion 5 is connected above the seat 6, and chair legs 7 are connected to the lower end of the seat 6. The back support assembly includes a back support frame 2 and support struts 3 that are symmetrically arranged on both sides of the seat 6 and are symmetrically arranged left and right. The back support frame 2 includes a middle part 2a and extension parts 2b that extend forward from both sides of the middle part 2a. The middle part 2a is configured to connect to the backrest 1. A downward support column 2c is integrally formed at a position closer to the front of the extension part 2b. The support column 2c is sleeved with the support strut 3, and the support column 2c moves up and down relative to the support strut 3 to adjust the height of the back support frame 2 and stay at the corresponding position after adjustment. The support strut 3 is slidably connected to the seat 6 in the front and back directions to adjust the position of the back support frame 2 relative to the seat 6 and stay at the corresponding position after adjustment.

[0035] Furthermore, there are two ways of sleeving the support column 2c and the support strut 3. The first way is that the support column 2c is a hollow tubular structure, and the support column 2c is sleeved outside the support strut 3; alternatively, the support strut 3 is a hollow tubular structure, and the support column 2c is inserted into the support strut 3. Both of these ways can make the sleeved or inserted structure between the support column 2c and the support frame simple and convenient to operate.

[0036] Furthermore, the support strut 3 includes a vertical part and a horizontal part 15 that bends inward from the lower end of the vertical part. The horizontal part 15 is slidably matched with the seat 6; the vertical part is a hollow tubular structure with an open upper end, and the support column 2c is inserted into the vertical part; the support column 2c and the support rod are hollow tube structures, which can reduce the weight of the seat and facilitate transportation.

[0037] Furthermore, the extension part 2b is a plate-like body. The extension part 2b includes a vertical enclosing plate 23 and a horizontal plate 24 that extends and turns outward from the upper edge of the enclosing plate 23. The enclosing plate 23 and the horizontal plate 24 together form an armrest for easy arm rest, and the upper surface of the horizontal plate 24 forms a resting surface; the support column 2c is integrally extended downward from the front part of the enclosing plate 23; the upper surface of the horizontal plate 24 forms a resting surface, enabling users to place their arms more comfortably and reducing the pressure on the arms; moreover, the combined design of the enclosing plate 23 and the horizontal plate 24 makes the appearance of the chair more beautiful; the design of the resting surface also increases the overall visual attraction of the chair, making it look more fashionable and delicate.

[0038] Furthermore, the support column 2c is a flat column body with the same thickness as the enclosing plate 23, and the vertical part is also flat. A rectangular hole with an open upper end is formed on the vertical part, and the support column 2c is inserted and matched with the rectangular hole; the design of the support column 2c and the enclosing plate 23 adopts a flat column body and a flat structure, making the entire extension part 2b look more integrated; the design of the insertion and matching makes the connection between the support column 2c and the vertical part easy to disassemble and convenient for later maintenance.

[0039] Furthermore, the surface of the support column 2c is provided with graduations; the graduations are convenient for the user to observe, enabling the seated person to move the support column 2c up and down to a predetermined position according to their own usage requirements.

[0040] Furthermore, the support strut 3 is of a hollow tubular structure, and the support column 2c is inserted therein; an adjustment and locking mechanism is provided between the support column 2c and the support strut 3. The adjustment and locking mechanism includes a screw 21 and a sleeve 20 sleeved between the inner sides of the support column 2c and the support strut 3. A buckle 201 is provided on the sleeve 20, and a clamping hole 31 is formed on the support strut 3. The buckle 201 is clamped in the clamping hole 31; the outer end of the screw 21 is connected with a knob 14, and the other end of the screw 21 is threadedly connected with the side wall of the support strut 3; when the support column 2c is moved up and down to a corresponding position, the knob 14 is turned to enable the screw 21 to directly or indirectly act on the outer wall of the sleeve 20, causing the tube wall of the sleeve 20 to deform and press the support column 2c, so that the support column 2c stays at the corresponding position; the structure of the adjustment and locking mechanism is simple and easy to operate, enabling the user to turn the knob 14 to deform the sleeve 20, without the end of the screw 21 directly abutting against the support column 2c, avoiding damage to the support column 2c while also being able to lock the position of the support column 2c.

[0041] Furthermore, the screw 21 directly acting on the outer wall of the sleeve 20 means that when the screw 21 rotates, its end directly acts on the sleeve 20 to deform it. However, in order to make the force-bearing area of the sleeve 20 larger and the force when the sleeve 20 presses the support column 2c more stable, the screw 21 can also indirectly act on the sleeve 20. Specifically, a groove 202 is provided on the outer wall of the sleeve 20 facing the end of the screw 21, and a gasket 22 matching the size of the groove 202 is provided in the groove 202. When the knob 14 is turned to lock the position of the support column 2c, the end of the screw 21 presses the gasket 22 in the groove 202, thereby causing the tube wall of the sleeve 20 to deform and press the support column 2c; the groove 202 can accommodate the gasket 22 and reduce the thickness of the tube wall of the sleeve 20, making the sleeve 20 easier to deform, and the gasket 22 can increase the acting area of the screw 21 on the sleeve 20, making the extrusion force received by the support column 2c more uniform and stable.

[0042] Furthermore, the sliding fit between the transverse portion 15 and the seat 6 means that: sliding rods 9 extending in the front-back direction are fixed to both sides of the seat 6. The two sides of the seat 6 are hollowed out to form accommodation grooves 11. Lapping portions 18 are provided at the front and rear ends of the accommodation grooves 11. The sliding rods 9 are arranged in a suspended manner. Screws 16 pass through through-holes 19 preset at both ends of the sliding rods 9 and are threadedly connected to the lapping portions 18, so that both ends of the sliding rods 9 are fixed to the lapping portions 18. The transverse portion 15 of the support strut 3 is sleeved on the sliding rod 9, enabling the support strut 3 to move back and forth relative to the sliding rod 9. To prevent excessive wear when the support strut 3 slides, a bushing 10 that can slide back and forth with the transverse portion 15 is further provided between the transverse portion 15 of the support strut 3 and the sliding rod 9. A locking and adjusting mechanism is further provided between the support strut and the seat 6. The locking and adjusting mechanism includes a handle 4, a control pin 13, and a locking groove 8. The locking groove 8 is arranged at least on one side of the seat 6 in the front-back direction. The handle 4 is movably connected to the support strut 3, and the control pin 13 is inserted into or disengaged from the locking groove 8 in response to the movement of the handle 4. The sliding rod 9 is a smooth rod, which plays a role in sliding guidance, while the locking and adjusting mechanism that plays a locking role after sliding is arranged between the support strut 3 and the seat. It is completed by the cooperation of the control pin and the locking groove opened on the seat. In this way, when the backrest support is subjected to a leaning force, the reverse support force of the backrest support is jointly borne by the positions of the sliding rod and the locking groove of the seat, and the force is more evenly distributed, avoiding single-point force application.

[0043] Furthermore, the locking and adjusting mechanism locks or unlocks the horizontally sliding transverse portion 15 through the lever principle. Specifically, the handle 4 is integrally formed at the outer end of the control pin 13. The other end of the control pin 13 is provided with a toothed portion 41. A longitudinally penetrating through-hole is provided inside the transverse portion 15. A cover plate 4b is connected to the outside of the transverse portion 15. An avoidance hole 41b is provided on the cover plate 4b. After the control pin 13 is inserted into the avoidance hole 4b, the middle thereof is rotatably connected to the transverse portion 15, and the toothed portion 41 passes upward through the through-hole and is stuck in the locking groove 8. A compression spring 12 is provided between the cover plate and the toothed portion 41. In the locked state of the transverse portion 15, the compression spring 12 provides the force for the toothed portion 41 to be stuck in the locking groove 8. When the transverse portion 15 needs to be unlocked, only need to act downward on the handle 4 to make it rotate, so that the toothed portion 41 can be disengaged from the locking groove 8 and compress the compression spring 12. When the transverse portion 15 slides to the next position, release the handle 4, and the compression spring 12 resets and makes the toothed portion 41 be stuck in the corresponding locking groove 8.

[0044] The above schematically describes the present invention and its embodiments. This description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, design similar structural forms and embodiments to this technical solution without creative efforts, they should all fall within the protection scope of the present invention.

Claims

1. A multi-posture adjustable chair, characterized in that: The invention comprises a seat and a back support assembly, wherein the back support assembly comprises a back support frame, support struts located on both sides of the seat and symmetrically arranged, the back support frame comprises a middle portion and extension portions extending forward from both sides of the middle portion, the middle portion is configured to connect the backrest, and the front position of the extension portion is integrally formed with a downward support, the support portion is sleeved together with the support struts, the support portion moves up and down relative to the support struts to adjust the height of the back support frame and stays at the corresponding position after adjustment; and the support struts are slidably connected to the seat front and back to adjust the position of the back support frame relative to the seat and stays at the corresponding position after adjustment.

2. The multi-posture adjustable chair according to claim 1, characterized in that: The support is a hollow tubular structure, and the support is sleeved outside the support rod; or, the support rod is a hollow tubular structure, and the support is inserted into the support rod.

3. The multi-posture adjustable chair according to claim 2, characterized in that: The support rod comprises a vertical part and a transverse part bent inward from the lower end of the vertical part, the transverse part is slidably matched with the seat; the vertical part is a hollow tubular structure with an open upper end, and the support column is plugged into the vertical part.

4. The multi-posture adjustable chair according to claim 3, characterized in that: The extension part is a plate-like body, which includes a vertical enclosure and a transverse plate that extends outward from the upper edge of the enclosure. The enclosure and the transverse plate together constitute an armrest for easy armresting, and the upper surface of the transverse plate forms a resting surface; the support column is formed by an integral downward extension of the front part of the enclosure.

5. The multi-posture adjustable chair according to claim 4, characterized in that: The support is a flat column with the same thickness as the enclosure, and the vertical portion is also flat. A rectangular hole with an open upper end is formed on the vertical portion, and the support is plug-fitted into the rectangular hole.

6. The multi-posture adjustable chair according to claim 3, characterized in that: The surface of the pillar is provided with scales.

7. The multi-posture adjustable chair according to claim 2, characterized in that: The support rod is a hollow tubular structure with the pillar inserted inside; an adjustment locking mechanism is provided between the pillar and the support rod, and the adjustment locking mechanism includes a screw and a sleeve sleeved between the pillar and the inner side of the support rod, a knob is connected to the outer end of the screw, and the other end of the screw is threadedly connected to the side wall of the support rod; when the pillar moves up and down to the corresponding position, the knob is turned to make the screw act directly or indirectly on the outer wall of the sleeve, so that the tube wall of the sleeve is deformed and presses the pillar, thereby making the pillar stay in the corresponding position.

8. The multi-posture adjustable chair according to claim 7, characterized in that: A groove is provided on the outer wall of the sleeve facing the end of the screw, and a gasket matching the size of the groove is provided in the groove. When the knob is twisted to lock the position of the pillar, the end of the screw squeezes the gasket in the groove, thereby deforming the wall of the sleeve and pressing the pillar.

9. The multi-posture adjustable chair according to claim 3, characterized in that: The sliding cooperation between the transverse part and the seat means that: sliding rods extending forward and backward are fixed on both sides of the seat, and the sliding rods are set in the hollow, and the transverse part of the support rod is sleeved with the sliding rod so that the support rod can move forward and backward relative to the sliding rod; a locking adjustment mechanism is also provided between the support rod and the seat, and the locking adjustment mechanism includes a handle, a control pin and a locking groove, and the locking groove is arranged on at least one side of the seat along the front and rear direction, and the handle is movably connected to the support rod, and the control pin responds to the movement of the handle to insert or disengage from the locking groove.

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