Office chair capable of adjusting sitting posture

Abstract

The utility model belongs to the technical field of nursing chair equipment, and particularly relates to an office chair capable of adjusting a sitting posture, which comprises a base, a chair seat arranged on the base, a chair back connected with the chair seat and a leg supporting mechanism, aiming at the sitting posture requirements of different users, the utility model comprehensively provides the hidden multifunctional seat, through the cooperation of the rotary seat cushion and the rotary kneeler, the user can adjust the angle of the seat cushion and the kneeler according to the sitting posture, so that the seat can adapt to the users with different heights, different body types and different sitting posture habits; and the use comfort of the user is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of nursing chair equipment, specifically relating to an office chair with adjustable sitting posture. Background Technology

[0002] Statistics show that the average person sits for nearly nine hours a day, and the world is entering an era of prolonged sitting. In China, 43% of office workers say they sit for at least eight hours a day, and 58.6% of office workers sit for more than one hour at a time, with 39.3% sitting for more than 90 minutes. People who sit for more than six hours a day have a 26.7% increased risk of developing 12 chronic diseases, and their lumbar spine injuries are more likely to worsen. Therefore, in order to improve user comfort and reduce the harm of prolonged sitting, various office chairs with massage functions have appeared on the market. However, in general, most products are basic models with limited adaptability.

[0003] For example, Chinese utility model patent CN214341179U discloses an office chair with a function to relieve lumbar fatigue. The office chair with the function to relieve lumbar fatigue includes a seat, a backrest fixedly installed inside the seat via a rotating rod, an armrest fixedly installed on one side of the backrest, and one side of the armrest movably installed on one side of the seat via an extension telescopic rod. The rotating rod can rotate around the seat, so that the user can lie down and rest. During this process, the rotating rod limits the backrest. The angle of the backrest to the horizontal plane can be adjusted by adjusting the angle knob. When the extension telescopic rod is extended to its maximum length, it is the maximum angle of the backrest to the horizontal plane. When the user lies down, he / she can place his / her legs on the upper surface of the leg support plate.

[0004] For example, Chinese invention patent CN109124061A discloses a chair with posture correction and massage functions, including a chair support and a backrest. The chair support is a kneeling chair support mechanism, and the backrest is equipped with a massage mechanism with a back-tapping function. This invention is suitable for people who sit for long periods of time, especially high school students, thereby effectively preventing myopia and hunchback and reducing fatigue from sitting for long periods of time.

[0005] However, the above solutions are all undifferentiated designs for most users. Different users have different sitting postures, and the above solutions cannot well meet the sitting posture habits of different users. Therefore, there is an urgent need for a personalized design of an adjustable office chair. Utility Model Content

[0006] The purpose of this invention is to provide an adjustable office chair to partially alleviate or solve the above-mentioned problems and improve user comfort.

[0007] To solve the aforementioned technical problems, the present invention specifically adopts the following technical solution:

[0008] An adjustable office chair includes a base, a seat disposed on the base, and a backrest connected to the seat. A cushion is rotatably disposed on the seat, and a leg support mechanism is also included.

[0009] The leg support mechanism includes a support member and two kneeling plates. A first end of the support member is rotatably connected to the base via a first pivot. Rotating members are rotatably disposed on both sides of the second end of the support member. The two kneeling plates are rotatably connected to the two rotating members via second pivots. The first pivot is positioned along the X-axis, the second pivot is positioned along the Y-axis, and the rotating members are parallel to the central axis of the support member. This allows the support member to drive the rotating members and the kneeling plates to rotate around the base in a first direction, the rotating members to drive the kneeling plates to rotate around the support member in the first direction, and the kneeling plates to rotate around the rotating members in a second direction.

[0010] As an improvement, the base includes a support seat and a connecting seat, with both ends of the connecting seat fixedly connected to the support seat and the chair seat respectively, and the connecting seat is provided with a receiving groove for accommodating the leg support mechanism.

[0011] As an improvement, the connecting seat includes a main body and a first baffle and a second baffle symmetrically arranged on two side walls of the main body. The main body has an installation space inside. The first baffle, the second baffle, and the main body enclose the receiving groove, and the shape of the receiving groove is the same as the shape of the support member, so that the support member can be completely embedded in the receiving groove.

[0012] As an improvement, the front end of the seat cushion is provided with a third pivot along the X-axis, and the rear end of the seat cushion is provided with a lifting mechanism.

[0013] When the lifting mechanism drives the rear end of the seat cushion to rise or fall, the front end of the seat cushion rotates around the base in a first direction to change the tilt angle of the seat cushion.

[0014] As an improvement, the lifting mechanism includes a telescopic rod and a drive device for extending and retracting the telescopic rod. One end of the telescopic rod is fixedly connected to the chair seat, and the other end is fixedly connected to the seat cushion.

[0015] As an improvement, a massage cushion is provided on the backrest, which corresponds to the user's back when the user sits on the cushion.

[0016] As an improvement, the support member is divided into a first sub-support member and a second sub-support member from the first end to the second end, wherein the acute angle between the first sub-support member and the horizontal direction is smaller than the acute angle between the second sub-support member and the horizontal direction.

[0017] As an improvement, the acute angle between the plane of the seat cushion and the horizontal plane ranges from 0° to 30°. Specifically, when the telescopic rod is retracted to its maximum extent, the acute angle between the plane of the seat and the horizontal plane is 0°, and when the telescopic rod is extended to its maximum extent, the acute angle between the plane of the seat and the horizontal plane is 30°.

[0018] As an improvement, when the user sits on the cushion and the leg support mechanism is extended, the acute angle between the extension line of the plane where the kneeling board is located and the horizontal plane is 15°-30°.

[0019] As an improvement, the kneeling board is provided with a soft pad.

[0020] The principle and beneficial technical effects of this utility model are as follows:

[0021] To address the different sitting posture needs of users, this application provides a hidden multi-functional seat. Through the combination of a rotating seat cushion and a rotating kneeling cushion, users can adjust the angle of the seat cushion and kneeling cushion according to their sitting posture. This allows the seat to adapt to users of different heights, body types, and sitting habits, thereby improving user comfort.

[0022] Specifically, in the initial mode, the leg support mechanism is housed in the receiving slot of the connecting seat, at which point the smart chair can be used as a regular seat. The kneeling cushion and connecting seat are integrated and will not disturb the user. When the user maintains the same sitting posture for too long, the user can adjust the tilt angle of the seat cushion to adapt to their posture. At the same time, when the user feels a lot of pressure on their lower back, for example, when the user adjusts the angle of the seat cushion too much, the leg support mechanism can extend to work with the seat cushion to support the user and reduce the pressure on their lower back. Furthermore, by adjusting the rotation angle of the seat cushion and kneeling cushion, it can adapt to different users. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0024] Figure 1 This is a perspective view of the office chair in its initial state in an embodiment of this utility model;

[0025] Figure 2 This is a perspective view of the leg support mechanism of the office chair during its unfolding process in an embodiment of this utility model.

[0026] Figure 3 This is a perspective view of another state of the leg support mechanism of the office chair during the unfolding process in an embodiment of this utility model;

[0027] Figure 4 This is a perspective view of the leg support mechanism of the office chair in an embodiment of the present utility model when it is unfolded.

[0028] Figure 5 This is a side view of the office chair in its initial state in an embodiment of this utility model;

[0029] Figure 6 This is a side view of the leg support mechanism of the office chair in an embodiment of the present invention when it is unfolded.

[0030] Figure 7 This is a schematic diagram of the structure of the base of the office chair in an embodiment of the present utility model;

[0031] Figure 8 This is a schematic diagram of the structure of the connecting seat of the office chair in an embodiment of this utility model;

[0032] Figure 9 This is an exploded view of the leg support mechanism of the office chair in an embodiment of this utility model;

[0033] Figure 10 This is a partial exploded view of the office chair in an embodiment of this utility model.

[0034] The markings in the diagram are: 1. Support base; 2. Connecting base; 201. Main seat body; 202. First baffle; 203. Second baffle; 3. Seat; 4. Backrest; 5. Cushion; 501. Third pivot; 502. Lifting mechanism; 6. Massage backrest; 7. Leg support mechanism; 71. Support component; 711. First sub-support component; 712. Second sub-support component; 72. Rotating component; 73. Kneeling board; 74. First pivot; 75. Second pivot; 8. Armrest; 9. First direction; 10. Second direction. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0036] In this document, suffixes such as "module," "component," or "unit" used to denote elements are used solely for the purpose of illustrative purposes and have no specific meaning in themselves. Therefore, "module," "component," or "unit" can be used interchangeably. In this document, terms such as "upper," "lower," "inner," "outer," "front," "rear," "one end," and "the other end," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In this document, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can also refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. In this document, "multiple" means two or more, that is, it includes two, three, four, five, etc.

[0038] Example 1

[0039] This embodiment is basically as follows: Figures 1-10 As shown:

[0040] This application provides an adjustable sitting office chair, including a base, a seat 3 disposed on the base, and a backrest 4 connected to the seat 3. A cushion 5 is rotatably disposed on the seat 3, and a leg support mechanism 7 is also included.

[0041] Specifically, the leg support mechanism 7 includes a support member and two kneeling plates 73. The first end of the support member is rotatably connected to the base via a first rotating shaft 74. Rotating members 72 are rotatably disposed on both sides of the second end of the support member. The two kneeling plates 73 are rotatably connected to the two rotating members 72 via second rotating shafts 75. The first rotating shaft 74 is disposed along the X-axis, and the second rotating shaft 75 is disposed along the Y-axis. The rotating members 72 are parallel to the central axis of the support member, that is, the plane containing the rotating members 72 is parallel to the plane formed by the Y-axis and the Z-axis. This allows the support member to drive the rotating members 72 and the kneeling plates 73 to rotate around the base in a first direction 9. The rotating members 72 can drive the kneeling plates 73 to rotate around the support member in the first direction 9, and the kneeling plates 73 can rotate around the rotating members 72 in a second direction 10.

[0042] In some embodiments, the kneeling board 73 is provided with a soft pad.

[0043] The X and Y axis directions can be referenced. Figure 1 That is, the X-axis direction is the width direction of the smart chair, the Y-axis direction is the length direction of the smart chair, and the Z-axis direction is the height direction of the smart chair; the first direction 9 and the second direction 10 can be found in [reference needed]. Figure 3 That is, the first direction 9 is parallel to the first plane formed by the Y-axis and the Z-axis, and the second direction 10 is parallel to the second plane formed by the X-axis and the Z-axis.

[0044] It should be noted that when the support member and / or rotating member 72 rotates, the direction of the second rotating shaft 75 may change, but the rotating member 72 and the second rotating shaft 75 are always parallel to the first plane. That is to say, when the support member and / or rotating member 72 rotates, the Y-axis direction also changes.

[0045] In some embodiments, the base includes a support base 1 and a connecting base 2, with both ends of the connecting base 2 fixedly connected to the support base 1 and the chair seat 3, respectively. The connecting base 2 is provided with a receiving groove for accommodating the leg support mechanism 7. See also Figure 7 The base is H-shaped, and the support base 1 has a mounting hole at its center. The connecting base 2 is connected to the support base 1 through the mounting hole.

[0046] In some embodiments, the connecting seat 2 includes a main seat 201 and a first baffle 202 and a second baffle 203 symmetrically arranged on two side walls of the main seat 201. The main seat 201 has an installation space inside. The first baffle 202, the second baffle 203 and the main seat 201 enclose the receiving groove. The shape of the receiving groove is the same as the shape of the support member, and the size (mainly the width) of the receiving groove is greater than the width of the support member, so that the support member can be completely embedded in the receiving groove. At the same time, when the kneeling plate 73 is retracted, it is parallel to the first baffle 202 and the second baffle 203, so that when the support member is embedded in the receiving groove, the kneeling plate 73 is located in the receiving groove and fits against the baffle.

[0047] In some embodiments, the first pivot 74 is mounted on the top of the receiving groove (i.e., at one end near the seat 3).

[0048] In some embodiments, a third pivot 501 is provided at the front end of the cushion 5 along the X-axis direction, and a lifting mechanism 502 is provided at the rear end of the cushion 5; when the lifting mechanism 502 drives the rear end of the cushion 5 to rise or fall, the front end of the cushion 5 rotates around the base along the first direction 9 to change the tilt angle of the cushion 5.

[0049] In some embodiments, the lifting mechanism 502 includes a telescopic rod and a driving device for extending and retracting the telescopic rod. One end of the telescopic rod is fixedly connected to the seat 3, and the other end is fixedly connected to the cushion 5. The telescopic rod may be a hydraulic rod, and the driving device may be a motor. The motor is installed within the mounting space of the main seat body 201 to reduce the size of the device.

[0050] In some specific embodiments, the third pivot 501 is located at the front end of the seat 3, and the telescopic rod is located at the rear end of the seat 3. When the telescopic rod is extended, the rear end of the seat cushion 5 is lifted, thereby causing the user to lean forward to adjust the user's sitting posture.

[0051] In some embodiments, see Figure 6The acute angle between the plane of the seat cushion 5 and the horizontal plane is α (preferably 0°-30°). When the telescopic rod is retracted to its maximum extent, the acute angle between the plane of the chair seat 3 and the horizontal plane is 0°. When the telescopic rod is extended to its maximum extent, the acute angle between the plane of the chair seat 3 and the horizontal plane is 30°. When the user sits on the seat cushion 5, the leg support mechanism 7 is deployed through the first rotating shaft 74, the rotating component 72, and the second rotating shaft 75. The acute angle between the extension line of the kneeling board plane and the horizontal plane is β (preferably 15°-30°). By limiting the above angles, when the user's legs are placed on the kneeling cushion, the bending angle of the user's legs is 60°-75°.

[0052] In some embodiments, a massage cushion 6 is provided on the backrest 4, and when a user sits on the seat cushion 5, the massage cushion 6 corresponds to the user's back.

[0053] In some embodiments, see Figure 9 The support member 71 is divided into a first sub-support member 711 and a second sub-support member 712 from the first end to the second end. The acute angle between the first sub-support member 711 and the horizontal direction is smaller than the acute angle between the second sub-support member 712 and the horizontal direction, thereby better adapting to the curve of the human leg.

[0054] In some embodiments, see Figure 10 The chair seat 3 is provided with armrests 8 on both sides.

[0055] In some embodiments, the smart chair is provided with a switch button for raising and lowering the lifting mechanism and a switch button for the leg support mechanism. In some specific embodiments, the switch button may be located on the armrest.

[0056] In actual use, the smart chair is in its initial state (see...). Figure 1 and Figure 5 At this point, the leg support mechanism is in its retracted state, and the smart chair can be used as a regular seat. When the user sits on the seat cushion, they can adjust the length of the telescopic rod to raise the rear half of the seat cushion, while the front half rotates around the third pivot, thus changing the seat angle to adapt to the user's posture. When the user remains in the same posture for a long time, experiences excessive lumbar pressure, or the seat cushion is adjusted to a large angle, the user can rotate the support rod to extend the leg support mechanism from the receiving cavity, and then lower the kneeling board around the second pivot (see...). Figures 2-4 , Figure 6This design allows the user's legs (knees or the lower legs near the knees) to rest on the kneeling board. At this time, the kneeling board and the seat cushion provide support for the user, meaning that the user's lower back pressure can be distributed to the legs, thereby reducing the user's lower back pressure and relieving the pressure of prolonged desk work. Furthermore, for users of different heights and body types (e.g., users with different leg lengths), the position of the kneeling board can be finely adjusted by combining the rotation angle of the rotating component, so that the kneeling board can better fit the user's legs.

[0057] In summary, this application provides a hidden multi-functional seat that, through the combination of a rotating seat cushion and a rotating kneeling cushion, allows users to adjust the angle of the seat cushion and kneeling cushion according to their sitting posture. This makes the seat adaptable to users of different heights, body types, and sitting habits, thereby improving user comfort.

[0058] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0059] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. An adjustable seating office chair, comprising a base, a seat disposed on the base, and a backrest connected to the seat, characterized in that, The chair seat is rotatably provided with a cushion and also includes a leg support mechanism; The leg support mechanism includes a support member and two kneeling plates. A first end of the support member is rotatably connected to the base via a first pivot. Rotating members are rotatably disposed on both sides of the second end of the support member. The two kneeling plates are rotatably connected to the two rotating members via second pivots. The first pivot is positioned along the X-axis, the second pivot is positioned along the Y-axis, and the rotating members are parallel to the central axis of the support member. This allows the support member to drive the rotating members and the kneeling plates to rotate around the base in a first direction, the rotating members to drive the kneeling plates to rotate around the support member in the first direction, and the kneeling plates to rotate around the rotating members in a second direction.

2. The adjustable seating chair according to claim 1, characterized in that, The base includes a support base and a connecting base. The two ends of the connecting base are fixedly connected to the support base and the chair seat, respectively. The connecting base is provided with a receiving groove for accommodating the leg support mechanism.

3. The adjustable seating chair according to claim 2, characterized in that, The connecting seat includes a main body and a first baffle and a second baffle symmetrically arranged on two side walls of the main body. The main body has an installation space inside. The first baffle, the second baffle and the main body enclose the receiving groove. The shape of the receiving groove is the same as the shape of the support member, so that the support member can be completely embedded in the receiving groove.

4. The adjustable seating chair according to claim 1, characterized in that, The front end of the seat cushion is provided with a third rotating shaft along the X-axis direction, and the rear end of the seat cushion is provided with a lifting mechanism. When the lifting mechanism drives the rear end of the seat cushion to rise or fall, the front end of the seat cushion rotates around the base in a first direction to change the tilt angle of the seat cushion.

5. An adjustable seating chair according to claim 4, characterized in that, The lifting mechanism includes a telescopic rod and a driving device for extending and retracting the telescopic rod. One end of the telescopic rod is fixedly connected to the chair seat, and the other end is fixedly connected to the cushion.

6. An adjustable seating chair according to claim 1, characterized in that, The chair back is equipped with a massage cushion, which is positioned to align with the user's back when the user sits on the cushion.

7. An adjustable seating chair according to claim 1, characterized in that, The support member is divided into a first sub-support member and a second sub-support member from the first end to the second end. The acute angle between the first sub-support member and the horizontal direction is smaller than the acute angle between the second sub-support member and the horizontal direction.

8. An adjustable seating chair according to claim 5, characterized in that, The acute angle between the plane of the seat cushion and the horizontal plane ranges from 0° to 30°. Specifically, when the telescopic rod is retracted to its maximum extent, the acute angle between the plane of the seat and the horizontal plane is 0°, and when the telescopic rod is extended to its maximum extent, the acute angle between the plane of the seat and the horizontal plane is 30°.

9. An adjustable seating chair according to claim 8, characterized in that, When the user sits on the cushion and the leg support mechanism is extended, the acute angle between the extension line of the plane where the kneeling board is located and the horizontal plane is 15°-30°.

10. An adjustable seating chair according to claim 1, characterized in that, The kneeling board is equipped with a soft pad.

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