Office chair with foot support

Abstract

The utility model discloses an office chair with a foot support. The office chair comprises a cushion, armrests are fixed at two ends of the cushion, a backrest is mounted on one side of the top of the cushion, a lifting mechanism is mounted at the bottom of the cushion, and a plurality of universal wheels are mounted at the bottom of the lifting mechanism; the side, away from the backrest, of the rotating shaft is fixedly connected with a telescopic assembly, and the end, away from the backrest, of the telescopic assembly is fixedly connected with an elastic foot support; an adjusting mechanism is connected to the rotating shaft, connected with the cushion and used for controlling the included angle between the cushion and the telescopic assembly. The office chair with the foot support solves the problems that the foot support of the existing office chair is inflexible to adjust, the adjusting operation is complicated, and the use comfort is poor.

Description

Technical Field

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

[0002] In the prior art, a utility model patent with publication number CN220546033U discloses a retractable footrest structure for an office chair, belonging to the technical field of office chairs. The structure comprises an office chair body, armrests at both ends of the body, a backrest at one side of the upper end of the body, a lifting mechanism at the lower end of the body, a moving mechanism at the lower end of the lifting mechanism, a slide bar at the lower side of the body, a footrest at the upper side of the slide bar, and a rotating assembly connecting the footrest and the slide bar. The utility model provides a rotating assembly to rotate the footrest according to the needs of the office worker. The rotating seat at the lower end of the footrest rotates on the fixed ear of the slide bar via a rotating shaft. After the rotating seat drives the footrest to rotate to the appropriate angle, a fixing bolt is inserted through the corresponding through hole in the annular rod and screwed into the fixing hole of the rotating seat, thereby achieving the effect of limiting and fixing the rotating seat and the footrest. However, the retractable footrest structure of the office chair in the patented technical solution only changes the angle of the footrest. The footrest can only perform horizontal telescopic movement under the drive of the slide bar, which is inflexible. The applicant has been engaged in the production of office chairs for a long time and found that ordinary office chairs do not have footrests and are not comfortable to use. Office chairs with footrests have inflexible adjustment structures and are difficult to adjust, and the comfort level cannot meet user needs.

[0003] Therefore, it is necessary to develop a kind of office chair with footrest for above-mentioned defective. Utility Model Content

[0004] The utility model aims to provide an office chair with a footrest, which can solve the problems of inflexible adjustment of the footrest of the existing office chair, complicated adjustment operation and poor comfort in use.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The utility model discloses an office chair with a footrest, comprising a seat cushion, armrests fixed at both ends of the seat cushion, a backrest installed on one side of the top of the seat cushion, a lifting mechanism installed at the bottom of the seat cushion, and a plurality of universal wheels installed at the bottom of the lifting mechanism; a rotating shaft is rotatably installed at the bottom of the seat cushion, a telescopic component is fixedly connected to a side of the rotating shaft away from the backrest, and an elastic footrest is fixedly connected to an end of the telescopic component away from the backrest; an adjusting mechanism is connected to the rotating shaft, and the adjusting mechanism is connected to the seat cushion for controlling the angle between the seat cushion and the telescopic component.

[0007] Furthermore, the telescopic assembly includes a telescopic rod, a telescopic unit and a telescopic bracket, one end of the telescopic rod is fixedly connected to the rotating shaft, and the other end and one end of the telescopic unit are both provided with a telescopic slide; one end of the telescopic bracket is fixedly connected to the elastic foot support, and the other end and the other end of the telescopic unit are both provided with a telescopic slot; a plurality of limit slots are provided in the telescopic slide at equal intervals along the axial direction, a telescopic card column is slidably connected in the telescopic slot, a telescopic spring is installed in the telescopic slot, one end of the telescopic card column is fixed to the telescopic spring, and the other end passes through the telescopic unit or the telescopic bracket and engages with the limit slot.

[0008] Furthermore, the adjustment mechanism includes an adjusting gear, a card plate, a limit plate, a pull rod and a fixed column. The adjusting gears are provided with two and are symmetrically fixed on the rotating shaft. The middle rotation of the card plate is installed at the bottom of the seat cushion. One end of the card plate is provided with a tooth groove engaged with the adjusting gear, and the other end is fixedly connected to the driving rod; the limit plate is fixedly installed at the bottom of the seat cushion, the driving rod passes through the limit plate and is fixed to the pull rod, and the end of the pull rod away from the driving rod is slidably connected to the fixed column, one end of the fixed column is provided with a handle, and the other end passes through the pull rod and engages with the seat cushion, and the seat cushion is provided with a fixing groove adapted to the fixed column.

[0009] Furthermore, the limiting plate is provided with an arc-shaped limiting groove adapted to the driving rod; the limiting plates are installed at both ends of the driving rod, and a stopper is fixedly installed through the limiting plate at one end of the driving rod away from the pull rod.

[0010] Furthermore, the cross-section of one end of the telescopic post engaged with the limiting slot is triangular; both ends of the rotating shaft are rotatably connected to the first support plates, and the two first support plates are fixedly connected to the bottom of the seat cushion.

[0011] Furthermore, the middle of the card plate is rotatably connected to the second support plate through a rotating column, and the second support plate is fixed to the bottom of the seat cushion; the card plate corresponds one-to-one with the adjusting gear, and the second support plate corresponds one-to-one with the card plate.

[0012] Compared with the prior art, the beneficial technical effects of the present invention are:

[0013] The utility model relates to an office chair with a footrest. The distance of the elastic footrest can be freely adjusted by setting a telescopic component. The adjustment can be achieved by pulling and pulling, and the adjustment operation is simple and convenient. The angle between the telescopic component and the seat cushion can be adjusted in a portable manner through the setting of a rotating shaft and an adjusting mechanism, and the telescopic component with the adjusted angle can be limited and fixed in a portable manner. The operation is simple. The change of the overall angle of the telescopic component drives the change of the angle and position of the footrest, which can better adapt to the human body structure, is more comfortable when used, and can better adapt to users of different heights to meet the usage needs of different users. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the main structure of an office chair with a footrest according to the present invention;

[0016] Figure 2 This is a schematic diagram of the top view of the office chair with a footrest of the present invention;

[0017] Figure 3 This is a schematic top view of the connecting portion of the telescopic assembly and the adjustment mechanism in the present invention;

[0018] Figure 4 For the Figure 2 Cross-sectional structural diagram along line BB;

[0019] Figure 5 For the Figure 2 Cross-sectional structural diagram along line AA;

[0020] Figure 6 for Figure 5 Schematic diagram of the enlarged structure at C in the middle;

[0021] Figure 7 for Figure 4 Schematic diagram of the enlarged structure at D in the middle;

[0022] Figure 8 This is a schematic structural diagram of the connection between the card plates in the present invention;

[0023] Figure 9 It is a schematic diagram of the three-dimensional structure of the telescopic clamping column in the utility model.

[0024] Explanation of the accompanying drawings: 2. rotating shaft; 3. telescopic assembly; 4. elastic footrest; 5. adjusting mechanism; 11. seat cushion; 12. armrest; 13. backrest; 14. lifting mechanism; 15. universal wheel; 21. first support plate; 31. telescopic rod; 32. telescopic unit; 33. telescopic bracket; 34. telescopic slide; 35. telescopic slot; 36. telescopic clamping column; 37. telescopic spring; 51. adjusting gear; 52. clamping plate; 53. limiting plate; 54. pull rod; 55. fixing column; 56. driving rod; 57. handle; 58. rotating column; 59. second support plate; 111. fixing slot; 341. limiting slot; 521. tooth groove; 531. limiting slot; 561. block. DETAILED DESCRIPTION

[0025] The core of the utility model is to provide an office chair with a footrest, which can solve the problems of the existing office chair footrest being inflexible to adjust, complicated to adjust, and poor comfort in use.

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0028] Please also refer to Figures 1 to 9 A specific embodiment of an office chair with a footrest provided by the present invention will now be described. The office chair with a footrest comprises a seat cushion 11, with armrests 12 fixed to both ends of the seat cushion 11, a backrest 13 mounted on one side of the top of the seat cushion 11, a lifting mechanism 14 mounted on the bottom of the seat cushion 11, and a plurality of universal wheels 15 mounted on the bottom of the lifting mechanism 14. A rotating shaft 2 is rotatably mounted on the bottom of the seat cushion 11, and a telescopic component 3 is fixedly connected to the side of the rotating shaft 2 away from the backrest 13. The end of the telescopic component 3 away from the backrest 13 is fixedly connected to an elastic footrest 4. An adjustment mechanism 5 is connected to the rotating shaft 2 and is connected to the seat cushion 11 for controlling the angle between the seat cushion 11 and the telescopic component 3.

[0029] For ease of explanation, please also refer to Figure 1 and Figure 2 , establish a rectangular coordinate system with any point in space as the origin, the setting direction of the seat cushion 11 relative to the lifting mechanism 14 as the Z axis, the setting direction of the elastic foot support 4 relative to the seat cushion 11 as the X axis, and the straight line direction perpendicular to both the X axis and the Z axis as the Y axis, where the XY plane is a horizontal plane, the direction indicated on the horizontal plane is the horizontal direction, and the direction indicated by the Z axis is the vertical direction.

[0030] In one embodiment of the present invention, the telescopic assembly 3 includes a telescopic rod 31, a telescopic unit 32, and a telescopic bracket 33. One end of the telescopic rod 31 is fixedly connected to the rotating shaft 2, and the other end and one end of the telescopic unit 32 are both provided with a telescopic slot 34. One end of the telescopic bracket 33 is fixedly connected to the elastic footrest 4, and the other end and the other end of the telescopic unit 32 are both provided with a telescopic slot 35. The telescopic slot 34 is provided with a plurality of limit slots 341 equidistantly spaced along the axial direction. A telescopic clamping column 36 is slidably connected to the telescopic slot 35, and a telescopic spring 37 is installed in the telescopic slot 35. One end of the telescopic clamping column 36 is fixed to the telescopic spring 37, and the other end passes through the telescopic unit 32 or the telescopic bracket 33 and engages with the limit slot 341. The telescopic slot 35 is arranged perpendicular to the telescopic slot 34.

[0031] In this embodiment, the cross-section of one end of the telescopic clamping column 36 that engages with the limiting clamping slot 341 is triangular; both ends of the rotating shaft 2 are rotatably connected to the first support plate 21, and the two first support plates 21 are fixedly connected to the bottom of the seat cushion 11. There are a number of telescopic units 32, and adjacent telescopic units 32 are slidably connected by the structure of the telescopic slide 34 and the telescopic clamping column 36. As long as the relevant performance functions of the telescopic units 32 can be achieved, they are within the scope of protection of this application. The telescopic slide 34 is a rectangular groove. The ends of the telescopic units 32 and the telescopic bracket 33 located in the telescopic slide 34 are each provided with a rectangular protrusion. The telescopic slot 35, telescopic spring 37 and telescopic clamping column 36 are symmetrically arranged on the upper and lower sides of the rectangular protrusion. The rectangular protrusion can prevent the telescopic units 32 and the telescopic bracket 33 from rotating and offsetting during the pulling and drawing process, thereby facilitating the engagement of the limiting clamping slot 341 with the telescopic clamping column 36.

[0032] In a specific embodiment of the present utility model, the adjustment mechanism 5 includes an adjusting gear 51, a card plate 52, a limit plate 53, a pull rod 54 and a fixed column 55. There are two adjusting gears 51, which are symmetrically fixed on the rotating shaft 2. The middle of the card plate 52 is rotatably installed at the bottom of the seat cushion 11. One end of the card plate 52 is provided with a tooth groove 521 engaged with the adjusting gear 51, and the other end is fixedly connected to the driving rod 56; the limit plate 53 is fixedly installed at the bottom of the seat cushion 11, the driving rod 56 passes through the limit plate 53 and is fixed to the pull rod 54, and the end of the pull rod 54 away from the driving rod 56 is slidably connected to the fixed column 55, one end of the fixed column 55 is provided with a handle 57, and the other end passes through the pull rod 54 and engages with the seat cushion 11. The seat cushion 11 is provided with a fixing groove 111 adapted to the fixing column 55.

[0033] In this embodiment, the card plate 52 is L-shaped, with a limit plate 53 having an arc-shaped limit slot 531 adapted to fit the drive rod 56. Limit plates 53 are mounted on both ends of the drive rod 56, and a stopper 561 is fixedly mounted through the limit plate 53 on the end of the drive rod 56 away from the pull rod 54. The center of the card plate 52 is pivotally connected to a second support plate 59 via a rotating post 58, which is fixed to the bottom of the seat cushion 11. The card plate 52 corresponds one-to-one with the adjustment gear 51, and the second support plate 59 corresponds one-to-one with the card plate 52. Any device that can achieve the aforementioned performance and functions of the card plate 52 is within the scope of protection of this application.

[0034] Compared with the existing technology, this office chair with footrest can freely adjust the distance of the elastic footrest 4 through the setting of the telescopic component 3, and the adjustment can be achieved by pulling and pulling, and the adjustment operation is simple and convenient; through the setting of the rotating shaft 2 and the adjustment mechanism 5, the angle between the telescopic component 3 and the seat cushion 11 can be adjusted in a portable manner, and the telescopic component 3 with adjusted angle can be limited and fixed in a portable manner, which is simple to operate. The overall angle change of the telescopic component 3 drives the change of the angle and position of the elastic footrest 4, which can better adapt to the human body structure, is more comfortable when used, and can better adapt to users of different heights to meet the usage needs of different users.

[0035] The process of using the office chair with a footrest of the present invention is as follows: first adjust the angle of the telescopic assembly 3 according to the needs of use, and then adjust the length of the telescopic assembly 3. The process of adjusting the angle of the telescopic assembly 3 is as follows: hold the handle 57 to withdraw the fixing column 55 from the fixing slot 111, pull the pull rod 54 upward through the fixing column 55, and the upward movement of the pull rod 54 drives the clamping plate 52 to rotate along the rotating column 58. The tooth groove 521 of the clamping plate 52 disengages from the adjusting gear 51, releasing the limit on the adjusting gear 51. At this time, the rotating shaft 2 can be freely rotated and the telescopic assembly 3 can be adjusted to the appropriate position. After the adjustment is completed, the clamping plate 52 is rotated by the pull rod 54, so that the tooth groove 521 engages with the adjusting gear 51, and the fixing column 55 is inserted back into the fixing slot 111, completing the adjustment and limit of the telescopic assembly 3. The process of adjusting the length of the telescopic assembly 3 is to grasp the telescopic bracket 33 and pull it outward or push it inward. When pulling it outward, the telescopic bracket 33 slides along the telescopic unit 32, which in turn slides along the telescopic rod 31. During this sliding process, the telescopic clamping post 36 is squeezed into the telescopic slot 35 by the force and the sidewalls of the telescopic slide 34, compressing the telescopic spring 37. When the length is adjusted to the desired value, gently shake the telescopic unit 32 or the telescopic bracket 33 back and forth, causing the telescopic clamping post 36 to pop out and engage with the nearby limit slot 341 under the force of the telescopic spring 37. The telescopic clamping post 36 will not separate from the limit slot 341 under the action of a small external force, thus achieving the locking and limiting function. Under the action of a large external force, the telescopic clamping post 36 can be disengaged from the limit slot 341 and moved horizontally.

[0036] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0037] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. An office chair with a footrest, characterized by: The invention comprises a seat cushion (11), armrests (12) are fixed at both ends of the seat cushion (11), a backrest (13) is installed on one side of the top of the seat cushion (11), a lifting mechanism (14) is installed at the bottom of the seat cushion (11), and a plurality of universal wheels (15) are installed at the bottom of the lifting mechanism (14); a rotating shaft (2) is rotatably installed at the bottom of the seat cushion (11), a telescopic component (3) is fixedly connected to the side of the rotating shaft (2) away from the backrest (13), and an elastic footrest (4) is fixedly connected to the end of the telescopic component (3) away from the backrest (13); an adjusting mechanism (5) is connected to the rotating shaft (2), and the adjusting mechanism (5) is connected to the seat cushion (11) and is used to control the angle between the seat cushion (11) and the telescopic component (3).

2. The office chair with a footrest according to claim 1, characterized in that: The telescopic assembly (3) comprises a telescopic rod (31), a telescopic monomer (32) and a telescopic bracket (33), one end of the telescopic rod (31) is fixedly connected to the rotating shaft (2), and the other end and one end of the telescopic monomer (32) are both provided with a telescopic sliding groove (34); one end of the telescopic bracket (33) is fixedly connected to the elastic foot support (4), and the other end and the other end of the telescopic monomer (32) are both provided with a telescopic card slot (35); a plurality of limit card slots (341) are equidistantly spaced along the axial direction in the telescopic sliding groove (34), a telescopic card column (36) is slidably connected in the telescopic card slot (35), a telescopic spring (37) is installed in the telescopic card slot (35), one end of the telescopic card column (36) is fixed to the telescopic spring (37), and the other end passes through the telescopic monomer (32) or the telescopic bracket (33) and is engaged with the limit card slot (341).

3. The office chair with a footrest according to claim 2, characterized in that: The adjusting mechanism (5) comprises an adjusting gear (51), a clamping plate (52), a limiting plate (53), a pull rod (54) and a fixing column (55), wherein the adjusting gear (51) is provided with two and symmetrically fixed on the rotating shaft (2), the middle of the clamping plate (52) is rotatably mounted on the bottom of the seat cushion (11), one end of the clamping plate (52) is provided with a tooth groove (521) meshing with the adjusting gear (51), and the other end is fixedly connected to a driving rod (56); the limiting plate (5 3) It is fixedly mounted on the bottom of the seat cushion (11), the driving rod (56) passes through the limiting plate (53) and is fixed to the pull rod (54), and one end of the pull rod (54) away from the driving rod (56) is slidably connected to the fixing column (55), one end of the fixing column (55) is provided with a handle (57), and the other end passes through the pull rod (54) and is engaged with the seat cushion (11), and a fixing groove (111) adapted to the fixing column (55) is provided on the seat cushion (11).

4. The office chair with a footrest according to claim 3, characterized in that: The limiting plate (53) is provided with an arc-shaped limiting groove (531) adapted to the driving rod (56); the limiting plates (53) are installed at both ends of the driving rod (56); the end of the driving rod (56) away from the pull rod (54) passes through the limiting plate (53) and is fixedly installed with a stopper (561).

5. The office chair with a footrest according to any one of claims 2 to 4, characterized in that: The cross section of one end of the telescopic clamping column (36) engaged with the limiting clamping groove (341) is triangular; both ends of the rotating shaft (2) are rotatably connected to the first support plates (21), and the two first support plates (21) are fixedly connected to the bottom of the seat cushion (11).

6. The office chair with a footrest according to claim 3, characterized in that: The middle of the card plate (52) is rotatably connected to the second support plate (59) through a rotating column (58), and the second support plate (59) is fixed to the bottom of the seat cushion (11); the card plate (52) corresponds to the adjusting gear (51) one by one, and the second support plate (59) corresponds to the card plate (52) one by one.

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