Office chair

Abstract

The utility model discloses an office chair which comprises a pentagonal disc and a hydraulic lifting column installed in the center of the top end of the pentagonal disc, an inclined pull arm extending upwards in an inclined mode is installed at the top end of a piston rod of the hydraulic lifting column, a seat support is installed at the top end of the inclined pull arm, and a chair body is connected to the upper surface of the seat support in a bolted mode. Universal wheels are installed at the corners of the bottom end of the pentagonal disc, an H-shaped supporting beam is fixed to the bottom end of the seat body, and a right-angle leg support is hinged to the outer wall of the side, away from the seat body, of the H-shaped supporting beam. According to the utility model, a user can easily find the best use posture, so that the comfort of the seat is improved, and the user can quickly and easily unfold or fold the right-angle leg support without leaving the seat or carrying out complicated manual operation.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to an office chair. Background Art

[0002] As an indispensable part of the modern office environment, the office chair is structurally designed to provide comfort and support for long - term sitting postures. Its main structures include a seat part, a backrest part, a base and support, armrests and various adjustment mechanisms. The seat part is usually composed of a seat cushion and a backrest. The seat cushion is designed to tilt slightly forward and is made of high - density foam material, which is both comfortable and supportive. The backrest is designed to support the entire back and waist, and is usually composed of a plastic shell and a metal support skeleton inside, covered with comfortable padding materials. The seat base is often made of aluminum alloy or plastic and is equipped with five support wheels to provide stability and mobility. The pneumatic cylinder adjusts the height of the seat to adapt to different desk heights and user needs. The armrests are fixed on both sides of the seat to provide additional support; for example, an office chair footrest telescopic structure disclosed in the authorized announcement number CN220546033U includes an office chair body, armrests are arranged at both ends of the office chair body, a backrest is arranged on one side of the upper end of the office chair body, a lifting mechanism is arranged at the lower end of the office chair body, a moving mechanism is arranged at the lower end of the lifting mechanism, a sliding rod is arranged on the lower side of the office chair body, a footrest is arranged on the upper side of the sliding rod, and the footrest is connected to the sliding rod through a rotating component. By setting the rotating component, the footrest can be rotated according to the needs of office workers. The rotating seat at the lower end of the footrest rotates on the fixed ear of the sliding rod through a rotating shaft. After the rotating seat drives the footrest to rotate to an appropriate angle, the fixing bolt is passed through the corresponding through - hole on the annular rod and the fixing bolt is screwed into the fixing hole of the rotating seat to achieve the effect of limiting and fixing the rotating seat and the footrest. However, this technical solution requires manual operation by the user when controlling the unfolding and folding of the leg rest and footrest, which increases the complexity and inconvenience of using the office chair for the user. Especially in the case of frequent adjustment or quick adjustment, this manual operation will appear cumbersome and time - consuming. Users usually hope to quickly adjust the seat during work to obtain the best working posture and comfort, while the manual operation method may become a burden during use, affecting work efficiency and comfort. Moreover, manual operation is often difficult to accurately reach the position and angle expected by each user, which will affect the comfort of the seat. Summary of the Invention

[0003] The purpose of the utility model is to provide an office chair. The top of the hydraulic lifting column is connected to the seat body through a diagonal tension arm and a seat support, so as to form a space at the bottom of the seat body for accommodating an H - shaped support beam and a right - angled leg rest, and the right - angled leg rest can be quickly stored and unfolded by using a control panel, an electric push rod and a double - link folding structure, so as to solve the problems raised in the above background art.

[0004] To achieve the above object, the present utility model provides the following technical solutions: An office chair includes a five-star base and a hydraulic lift column installed at the center of the top of the five-star base. The top of the piston rod of the hydraulic lift column is installed with a diagonal pull arm extending obliquely upward. The top of the diagonal pull arm is installed with a seat support, and a seat body is bolted to the upper surface of the seat support. Universal wheels are installed at the bottom corners of the five-star base. A H-shaped support beam is fixed to the bottom of the seat body. A right-angled leg rest is hinged to the outer wall of the side of the H-shaped support beam away from the seat body. Electric push rods are installed on both sides of the bottom of the H-shaped support beam. The movable end of the electric push rod is installed with a double-link folding structure for connecting to the bottom of the right-angled leg rest. A storage battery electrically connected to the input end of the electric push rod is installed on one side of the bottom of the seat support. A control panel electrically connected to the input end of the electric push rod is installed on the outer wall of one side of the seat body.

[0005] Preferably, the outer circumference of the right-angled leg rest is covered with a foam column.

[0006] Preferably, the H-shaped support beam and the right-angled leg rest are made of aluminum alloy components.

[0007] Preferably, steel columns are installed on both outer walls of the diagonal pull arm, and the steel columns extend towards the outer wall of the seat body and are flush with the outer wall surface of the seat body.

[0008] Preferably, main connection seats are fixed on both sides of the bottom of the H-shaped support beam, and a first tongue for hinging with the main connection seat is installed at the bottom of the right-angled leg rest.

[0009] Preferably, the double-link folding structure includes a convex foot fixed on one side of the bottom of the H-shaped support beam, a main link hinged on the outer wall of the convex foot, a secondary pull rod hinged at the bottom of the right-angled leg rest, and a Y-shaped joint hinged at the top of the piston rod of the electric push rod. The bottom of the main link is hinged to the outer wall of one side of the Y-shaped joint. One end of the secondary pull rod extends into the Y-shaped joint and is connected to the Y-shaped joint. A second tongue is fixed at the bottom of the right-angled leg rest, and the second tongue is hinged to one end of the convex foot.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: By setting structures such as electric push rods and right-angled leg rests that cooperate with each other, the angle and height of the right-angled leg rest can be adjusted through the control panel to adapt to different body postures and personal preferences. Compared with manual adjustment, this precision allows users to more easily find the best usage posture, thereby improving the comfort of the seat. Moreover, users can quickly and easily unfold or store the right-angled leg rest without leaving the seat or performing complex manual operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Side view structural schematic diagram of the present utility model;

[0012] Figure 2 Three-dimensional structural schematic of the present utility model Figure 1 ;

[0013] Figure 3 Three-dimensional structural schematic of the present utility model Figure 2 ;

[0014] Figure 4 Three-dimensional structural schematic of the present utility model Figure 3 ;

[0015] Figure 5 Of the present utility model Figure 2 Enlarged structural schematic diagram at position A;

[0016] Figure 6 Three-dimensional structural schematic of the present utility model Figure 4 .

[0017] In the figure: 1, pentagonal plate; 2, universal wheel; 3, hydraulic lifting column; 4, diagonal pull arm; 5, seat support; 6, seat body; 7, H-shaped support beam; 701, main connection seat; 8, right-angle leg rest; 801, foam column; 802, first tongue; 9, electric push rod; 10, double-link folding structure; 1001, Y-shaped joint; 1002, main link; 1003, secondary pull rod; 1004, second tongue; 1005, convex foot; 11, control panel; 12, storage battery. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0019] Please refer to Figures 1-6, an embodiment provided by the present utility model: an office chair, including a five-star base 1 and a hydraulic lift column 3 installed at the center of the top of the five-star base 1. The top of the piston rod of the hydraulic lift column 3 is installed with a diagonal tension arm 4 extending obliquely upward. The top of the diagonal tension arm 4 is installed with a seat support 5, and a seat body 6 is bolted to the upper surface of the seat support 5. Universal wheels 2 are installed at the bottom corner positions of the five-star base 1. A H-shaped support beam 7 is fixed to the bottom of the seat body 6. A right-angled leg rest 8 is hinged to the outer wall of the side of the H-shaped support beam 7 away from the seat body 6. Electric push rods 9 are installed on both sides of the bottom of the H-shaped support beam 7. The movable end of the electric push rod 9 is installed with a double-link folding structure 10 for connecting to the bottom end of the right-angled leg rest 8. A storage battery 12 electrically connected to the input end of the electric push rod 9 is installed on one side of the bottom of the seat support 5. A control panel 11 electrically connected to the input end of the electric push rod 9 is installed on the outer wall of one side of the seat body 6;

[0020] The two electric push rods 9 at the bottom of the H-shaped support beam 7 can work independently or synchronously under the control of the control panel 11. During this process, the staff selects which control panel 11 to work on the control panel 11, so that the two right-angled leg rests 8 can be respectively unfolded to different angles to meet the needs of the user's leg stretching, that is, the user can adjust the height and angle of the leg rest according to their own needs to make the legs in the most comfortable position;

[0021] Steel columns are installed on both outer walls of the diagonal tension arm 4, and the steel columns extend towards the outer wall of the seat body 6 and are flush with the outer wall surface of the seat body 6;

[0022] The H-shaped support beam 7 and the right-angled leg rest 8 are both made of components of aluminum alloy material. A foam column 801 is covered on the outer periphery of the right-angled leg rest 8. The foam column 801 sleeved on the surface of the right-angled leg rest 8 can reduce the pressure on the user's legs, making the user's legs more comfortable when suspended, and reducing leg fatigue and blood circulation problems;

[0023] Main connection seats 701 are fixed on both sides of the bottom of the H-shaped support beam 7. The bottom of the right-angled leg rest 8 is installed with a first tongue 802 for hinging with the main connection seat 701. When the electric push rod 9 drives the right-angled leg rest 8 to unfold through the double-link folding structure 10, the right-angled leg rest 8 and the first tongue 802 will rotate around the hinge axis in the main connection seat 701 until the right-angled leg rest 8 is flattened. When the right-angled leg rest 8 is parallel to the H-shaped support beam 7, it is the limit unfolded state of the right-angled leg rest 8;

[0024] The double-link folding structure 10 includes a convex foot 1005 fixed to one side of the bottom end of the H-shaped support beam 7, a main link 1002 hingedly installed on the outer wall of the convex foot 1005, a secondary pull rod 1003 hingedly installed at the bottom end of the right-angle leg rest 8, and a Y-shaped joint 1001 hingedly installed at the top end of the piston rod of the electric push rod 9. The bottom end of the main link 1002 is hinged to the outer wall of one side of the Y-shaped joint 1001. One end of the secondary pull rod 1003 extends into the Y-shaped joint 1001 and intersects with the Y-shaped joint 1001. A second convex tongue 1004 is fixed to the bottom end of the right-angle leg rest 8, and one end of the second convex tongue 1004 and the convex foot 1005 are hinged to each other. When the electric push rod 9 drives the right-angle leg rest 8 to fold through the double-link folding structure 10, the piston rod of the electric push rod 9 actively contracts, and the piston rod of the electric push rod 9 will drive the secondary pull rod 1003 and the right-angle leg rest 8 to deflect through the Y-shaped joint 1001. At this time, the main link 1002 rotates counterclockwise around the convex foot 1005, and the secondary pull rod 1003 rotates towards the main link 1002 until the right-angle leg rest 8 is rotated to the vertical state. At this time, the right-angle leg rest 8 and the H-shaped support beam 7 are in a vertical structure, and the right-angle leg rest 8 will not obstruct the user's legs, and the user can sit on the seat normally;

[0025] Through the electric push rod 9 and the double-link folding structure 10, the user can quickly and easily expand or store the double-link folding structure 10 without leaving the seat or performing complex manual operations, saving the user's time and energy.

[0026] When the embodiment of the present application is in use, first, the user sits on the seat body 6, and the hydraulic lifting column 3 can be used to adjust the heights of the diagonal arm 4, the seat support 5, and the seat body 6 until the office chair is adjusted to a more comfortable sitting height for the user. During this process, the top end of the piston rod of the hydraulic lifting column 3 is connected to the bottom end of the seat body 6 through the diagonal arm 4 and the seat support 5, so as to reserve a sufficient space area for arranging and installing the H-shaped support beam 7 and the right-angle leg rest 8 at the bottom end of the seat body 6, avoiding space obstruction caused by directly connecting the hydraulic lifting column 3 to the seat body 6. When the user needs to gradually expand the right-angle leg rest 8 from the vertical state to the horizontal state, the user turns on the electric push rod 9 through the control panel 11 to work, that is, controls the electric push rod 9 to actively extend. During this process, the storage battery 12 supplies power to the control panel 11 and the electric push rod 9. Then, during the extension process of the electric push rod 9, its piston rod will force the double-link folding structure 10 to perform an unfolding action, and then the double-link folding structure 10 will gradually drive the right-angle leg rest 8 to unfold and flip, and finally can be folded to the horizontal state. At this time, the right-angle leg rest 8 and the H-shaped support beam 7 are on the same horizontal plane, and the user can place the legs on the right-angle leg rest 8 so that the legs are in a suspended state.

[0027] The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An office chair, characterized in that: It includes a pentagonal plate (1) and a hydraulic lifting column (3) installed at the center of the top end of the pentagonal plate (1). The top end of the piston rod of the hydraulic lifting column (3) is installed with an inclined pull arm (4) extending obliquely upward. The top end of the inclined pull arm (4) is installed with a seat support (5), and the upper surface of the seat support (5) is bolted with a seat body (6). Universal wheels (2) are installed at the bottom corner positions of the pentagonal plate (1). The bottom end of the seat body (6) is fixed with an H-shaped support beam (7). One side outer wall of the H-shaped support beam (7) far from the seat body (6) is hinged with a right-angle leg rest (8). Electric push rods (9) are installed on both sides of the bottom end of the H-shaped support beam (7). The movable end of the electric push rod (9) is installed with a double-link folding structure (10) for connecting with the bottom end of the right-angle leg rest (8). A storage battery (12) electrically connected to the input end of the electric push rod (9) is installed on one side of the bottom end of the seat support (5). A control panel (11) electrically connected to the input end of the electric push rod (9) is installed on one side outer wall of the seat body (6).

2. An office chair according to claim 1, characterized in that: The outer periphery of the right-angle leg rest (8) is covered with a foam column (801).

3. An office chair according to claim 1, characterized in that: Both the H-shaped support beam (7) and the right-angle leg rest (8) are made of components of aluminum alloy material.

4. An office chair according to claim 1, characterized in that: Steel columns are installed on both outer walls of the inclined pull arm (4). The steel columns extend towards the outer wall of the seat body (6) and are flush with the outer wall surface of the seat body (6).

5. An office chair according to claim 1, characterized in that: Main connection seats (701) are fixed on both sides of the bottom end of the H-shaped support beam (7). The bottom end of the right-angle leg rest (8) is installed with a first tongue (802) for hinging with the main connection seat (701).

6. The office chair according to claim 1, wherein: The double-link folding structure (10) includes a lug (1005) fixed on one side of the bottom end of the H-shaped support beam (7), a main link (1002) hinged on the outer wall of the lug (1005), a secondary pull rod (1003) hinged on the bottom end of the right-angle leg rest (8), and a Y-shaped joint (1001) hinged on the top end of the piston rod of the electric push rod (9). The bottom end of the main link (1002) is hinged with one side outer wall of the Y-shaped joint (1001). One end of the secondary pull rod (1003) extends into the Y-shaped joint (1001) and intersects with the Y-shaped joint (1001). A second tongue (1004) is fixed on the bottom end of the right-angle leg rest (8), and the second tongue (1004) is hinged with one end of the lug (1005).

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