Sitting and reclining chair with multi-angle adjusting armrests

Abstract

The sitting and reclining chair comprises the armrest, a sitting module and a backrest module rotationally arranged at the rear end of the sitting module, an inner sleeve is arranged at the bottom end of the backrest module, an outer sleeve is arranged at the rear end of the sitting module, the inner sleeve is rotationally arranged in the outer sleeve, and the armrest comprises a swing arm and an armrest table; a sleeve part is arranged at the bottom end of the swing arm and arranged outside the outer sleeve in a sleeving mode, a first arc-shaped hole is formed in the outer sleeve, a second arc-shaped hole is formed in the inner sleeve, a connecting bolt is installed in the sleeve part and penetrates through the first arc-shaped hole and the second arc-shaped hole, the first arc-shaped hole is used for limiting the moving range of the connecting bolt, and the second arc-shaped hole is used for limiting the moving range of the connecting bolt. And the hole wall of one end of the second arc-shaped hole is a driving end and is used for driving the connecting bolt to rotate, so that when the chair state is switched to the deck chair state, the armrest table can swing backwards along with the sitting module, and the use experience is better.

Description

Technical Field

[0001] The invention relates to the technical field of reclining chairs, and in particular to a reclining chair with multi-angle adjustable armrests. Background Art

[0002] A reclining chair is a chair that can be used for both sitting and lying down. It has a sitting module and a backrest module that is rotatably arranged at the rear end of the sitting module. Armrests are fixedly installed on the left and right sides of the sitting module. When the backrest module rotates backward to switch the chair from a sitting state to a reclining state, the armrests cannot swing with the sitting module, so that the user cannot rest his hands comfortably on the armrests when lying down to sleep, and the armrests cannot swing out of place. When the user gets up and leaves the chair, he can only walk out from the front of the chair but cannot walk out directly from the side of the chair. This is not convenient and quick enough, and a large activity space needs to be reserved in front of the chair, which takes up a lot of space. Summary of the invention

[0003] The present invention aims to provide a reclining chair with multi-angle adjustable armrests to solve the above-mentioned technical problems.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a sitting and reclining chair with multi-angle adjustable armrests, comprising an armrest, a sitting module and a backrest module rotatably arranged at the rear end of the sitting module, an inner sleeve being arranged at the bottom end of the backrest module, an outer sleeve being arranged at the rear end of the sitting module, the inner sleeve being rotatably arranged in the outer sleeve, the armrest comprising a swing arm and an armrest platform arranged at the top end of the swing arm, a sleeve portion being arranged at the bottom end of the swing arm, the sleeve portion being sleeved on the outside of the outer sleeve to realize relative rotation, at least one pair of first arc-shaped holes which are centrally symmetrical are arranged on the outer sleeve, at least one pair of second arc-shaped holes which are centrally symmetrical are arranged on the inner sleeve, a connecting bolt is installed in the sleeve portion, the connecting bolt passes through the first arc-shaped hole and the second arc-shaped hole, the first arc-shaped hole is used to limit the movable range of the connecting bolt, and then limit the swing angle range of the armrest platform of the armrest, and one end hole wall of the second arc-shaped hole is a driving end, which is used to drive the connecting bolt to rotate, so that when switching from the sitting state to the reclining state, the armrest platform can swing backward following the sitting module.

[0005] Preferably, the angle adjustment range between the armrest platform and the horizontal plane when the reclining chair is in the reclining state does not exceed the angle adjustment range between the armrest platform and the horizontal plane when the reclining chair is in the sitting state.

[0006] Preferably, the maximum angle between the armrest and the horizontal plane when the reclining chair is in the reclining state is equal to the maximum angle between the armrest and the horizontal plane when the reclining chair is in the sitting state, and the minimum angle between the armrest and the horizontal plane when the reclining chair is in the reclining state is greater than the minimum angle between the armrest and the horizontal plane when the reclining chair is in the sitting state.

[0007] Preferably, there are two outer sleeves, which are respectively arranged on the left and right sides of the rear end of the riding module, and the two outer sleeves are respectively coaxially sleeved on the left and right sides of the inner sleeve to achieve relative rotation.

[0008] Preferably, each outer sleeve is provided with a pair of first arc-shaped holes which are centrally symmetrical, and a pair of second arc-shaped holes which are centrally symmetrical are respectively provided on the left and right sides of the inner sleeve, and the first arc-shaped hole and the second arc-shaped hole which match on the same side are concentrically arranged, and the central angle of the second arc-shaped hole is greater than the central angle of the first arc-shaped hole.

[0009] Preferably, the two centrally symmetrical first arc holes are respectively located on the upper and lower sides of the outer sleeve, and the two centrally symmetrical second arc holes are respectively located on the upper and lower sides of the inner sleeve, and the front end hole wall of the upper second arc hole and the rear end hole wall of the lower second arc hole are both driving ends.

[0010] Preferably, the outer sleeve and the inner sleeve are metal sleeves, a bushing is provided between the outer sleeve and the inner sleeve, and the bushing is a plastic bushing fixedly connected to the outer sleeve.

[0011] Preferably, it also includes a decorative sleeve plug, the sleeve part has a through hole that passes through the left and right sides, the connecting bolt is a bolt, the decorative sleeve plug includes a plug cover and a tube body arranged on the inner side of the plug cover, the tube body is provided with a clearance hole for the bolt to pass through, the tube body is installed in the inner sleeve, and the plug cover is matched with the hole opening on the outer side of the sleeve part.

[0012] Preferably, it also includes a lifting support module, which includes a supporting leg and an outer supporting tube arranged on the supporting leg, a screw mechanism is arranged inside the outer supporting tube, and the seating module includes a seat frame and a seat cushion detachably mounted on the seat frame, an inner supporting tube is arranged at the bottom of the seat frame, the inner supporting tube is inserted into the upper side of the inner part of the outer supporting tube, a slider is fixedly installed inside the inner supporting tube, and the slider is arranged on the screw mechanism for sliding up and down.

[0013] Preferably, the screw mechanism includes a fixed seat, a screw, and a first bevel gear and a second bevel gear installed in the fixed seat and vertically transmitted together, the first bevel gear is connected to the outside, the second bevel gear is fixedly connected to the bottom end of the screw, the slider is arranged outside the screw for up and down sliding, and the screw includes a metal rod core and a plastic threaded sleeve covering the outside of the metal rod core.

[0014] Preferably, it also includes a footrest module that is slidable and telescopically arranged below the seating module. A guide tube is arranged on the lower side of the seat frame. The footrest module includes two footrests, a longitudinal tube and a transverse tube that are T-shaped to each other. The longitudinal tube is slidable and arranged in the guide tube, and the two footrests are respectively swung back and forth on the left and right sides of the transverse tube.

[0015] The present invention has the following beneficial effects:

[0016] (1) When the seating module rotates backwards to switch the reclining chair from a sitting state to a reclining state, the driving end drives the connecting bolt to rotate, thereby causing the armrest to swing backwards, so that the armrest base is adjusted from a horizontal state to an inclined state, so that the user can naturally and comfortably rest his hands on the armrest when lying down to sleep. This setting can enable the armrest to swing backwards with the seating module to the most comfortable and appropriate angle position, without the need for the user to frequently adjust, resulting in a better and more user-friendly experience. Regardless of whether it is in a sitting state or a reclining chair state, it is only necessary to swing the armrest base of the armrest backwards to the maximum angle to free up a larger space on the left and right sides of the seating module, so that when entering or exiting (or in an emergency), the user can directly and quickly enter and exit from the side (left or right) of the chair, which is more convenient and quicker. In addition, there is no need to reserve a large activity space in front of the reclining chair, thereby reducing the occupied space.

[0017] (2) The screw rod comprises a metal rod core and a plastic threaded sleeve covering the outside of the metal rod core. This arrangement makes the screw rod lighter and has lower economic cost, making the reclining chair as a whole lighter and easier to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 2 is a top side perspective view of an embodiment of the present invention.

[0019] Figure 2 2 is a bottom side perspective view of an embodiment of the present invention.

[0020] Figure 3 It is a right side view of the embodiment of the present invention.

[0021] Figure 4 is a front view of an embodiment of the present invention.

[0022] Figure 5 is a rear view of an embodiment of the present invention.

[0023] Figure 6 It is a longitudinal cross-sectional view of an embodiment of the present invention at a position of a connecting bolt.

[0024] Figure 7 4 is a longitudinal cross-sectional view of an embodiment of the present invention at another position of the connecting bolt.

[0025] Figure 8 yes Figure 5 Sectional view at AA.

[0026] Fig. 9 Schematic diagram of the structure of a pedal module according to an embodiment of the present invention.

[0027] Fig.10It is a schematic diagram of the positions of the first arc hole, the second arc hole and the connecting bolt when the embodiment of the present invention is in a sitting state and the angle between the armrest and the horizontal plane is 0°.

[0028] Fig.11 It is a schematic diagram of the positions of the first arc hole, the second arc hole and the connecting bolt when the embodiment of the present invention is in the reclining state and the angle between the armrest and the horizontal plane is 15°.

[0029] Fig.12 It is a schematic diagram of the positions of the first arc hole, the second arc hole and the connecting bolt when the embodiment of the present invention is in a sitting state and the angle between the armrest and the horizontal plane is 45°.

[0030] Fig.13 It is a schematic diagram of the positions of the first arc hole, the second arc hole and the connecting bolt when the embodiment of the present invention is in the reclining state and the angle between the armrest and the horizontal plane is 45°.

[0031] The accompanying drawings are marked with: 1 armrest, 2 swing arm, 3 sleeve part, 4 seating module, 41 outer sleeve, 42 seat frame, 43 inner support tube, 44 seat cushion, 45 guide tube, 5 backrest module, 51 inner sleeve, 52 backrest tube, 53 back cushion, 54 lumbar support, 55 headrest, 6 first arc hole, 7 second arc hole, 71 driving end, 8 connecting bolt, 9 hydraulic telescopic rod, 10 bushing, 101 arc-shaped clearance hole, 11 decorative sleeve plug, 111 plug cover, 112 tube body, 113 through hole, 14 supporting foot frame, 15 outer support tube, 16 fixing seat, 17 screw, 18 first bevel gear, 19 second bevel gear, 20 slider, 21 longitudinal tube, 22 transverse tube, 23 footrest. DETAILED DESCRIPTION

[0032] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0033] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and 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 orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] See also Figure 1-13 As shown, as an embodiment of the present invention, a reclining chair with multi-angle adjustable armrests is provided, comprising an armrest, a seating module 4 and a backrest module 5 rotatably arranged at the rear end of the seating module 4, an inner sleeve 51 is arranged at the bottom end of the backrest module 5, an outer sleeve 41 is arranged at the rear end of the seating module 4, the inner sleeve 51 is rotatably arranged in the outer sleeve 41, the armrest comprises a swing arm 2 and an armrest platform 1 arranged at the top end of the swing arm 2, a sleeve portion 3 is arranged at the bottom end of the swing arm 2, the sleeve portion 3 is sleeved on the outside of the outer sleeve 41 to achieve relative rotation, and at least one For the first arc-shaped hole 6 which is centrally symmetrical, at least one pair of second arc-shaped holes 7 which are centrally symmetrical are arranged on the inner sleeve 51, and a connecting bolt 8 is installed in the sleeve portion 3, and the connecting bolt 8 passes through the first arc-shaped hole 6 and the second arc-shaped hole 7. The first arc-shaped hole 6 is used to limit the range of movement of the connecting bolt 8, and further limit the swing angle range of the armrest platform 1 of the armrest. The hole wall at one end of the second arc-shaped hole 7 is a driving end 71, which is used to drive the connecting bolt 8 to rotate, and further enables the armrest platform 1 to swing backwards following the riding module 4 when switching from the sitting state to the reclining state. Among them, the angle adjustment range between the armrest platform and the horizontal plane when the sitting reclining chair is in the reclining state does not exceed the angle adjustment range between the armrest platform and the horizontal plane when the sitting reclining chair is in the sitting state. Furthermore, the maximum angle between the armrest and the horizontal plane when the reclining chair is in the reclining state is equal to the maximum angle between the armrest and the horizontal plane when the reclining chair is in the sitting state, and the minimum angle between the armrest and the horizontal plane when the reclining chair is in the reclining state is greater than the minimum angle between the armrest and the horizontal plane when the reclining chair is in the sitting state.

[0036] According to the above technical solution, when the reclining chair is in the sitting state, the angle adjustment range between the armrest platform 1 of the armrest and the horizontal plane is 0-45°. Under normal circumstances, the angle between the armrest platform 1 of the armrest and the horizontal plane is 0°, so that the user can naturally and comfortably lean on the armrest when sitting. When the reclining chair is in the reclining state, the angle adjustment range between the armrest platform 1 of the armrest and the horizontal plane is 15-45°, that is, when the sitting module 4 rotates backward to switch the reclining chair from the sitting state to the reclining state, the driving end 71 drives the connecting bolt 8 to rotate 15°, thereby causing the armrest to swing backward 15°, so that the angle between the armrest platform 1 and the horizontal plane is adjusted from 0° to 15°, so that the user can sit comfortably. The user can naturally and comfortably lean his hands on the armrests when lying down to sleep. This arrangement can realize that the armrests can swing backwards with the sitting module 4 to the most comfortable and appropriate angle position, without the need for users to frequently adjust them, and the user experience is better and more user-friendly. Regardless of whether it is in a sitting state or a reclining state, the armrest platform 1 of the armrest can swing backwards so that the angle between it and the horizontal plane can be adjusted to a maximum of 45°, so that a larger space is freed up on the left and right sides of the sitting module 4, so that when entering or exiting (or in an emergency), the user can directly and quickly enter and exit from the side (left or right) of the chair, which is more convenient and quicker, and there is no need to reserve a large activity space in front of the reclining chair, thereby reducing the occupied space.

[0037] Of course, in other embodiments, the angle adjustment range between the armrest platform of the armrest and the horizontal plane can also be other numerical ranges. For example, when the reclining chair is in the sitting state, the angle adjustment range between the armrest platform of the armrest and the horizontal plane is 0 to 60°; when the reclining chair is in the reclining state, the angle adjustment range between the armrest platform of the armrest and the horizontal plane is 20 to 60°. The adjustment and setting can be made according to the specific situation, and there is no limitation here.

[0038] In this embodiment, there are two outer sleeves 41, which are respectively arranged on the left and right sides of the rear end of the seating module 4. The two outer sleeves 41 are respectively coaxially sleeved on the left and right sides of the inner sleeve 51 to achieve relative rotation, thereby ensuring the rotation adjustment between the seating module 4 and the backrest module 5 and the stability of the assembly support.

[0039] In this embodiment, a hydraulic telescopic rod 9 is installed between the backrest module 5 and the seating module 4 to achieve controllable adjustment of the rotation and reset between the backrest module 5 and the seating module 4 .

[0040] In this embodiment, each outer sleeve 41 is provided with a pair of first arc holes 6 in a centrally symmetrical manner, and a pair of second arc holes 7 in a centrally symmetrical manner are respectively provided on the left and right sides of the inner sleeve 51, and the first arc hole 6 and the second arc hole 7 on the same side are arranged concentrically, and the central angle of the second arc hole 7 is greater than the central angle of the first arc hole 6. Among them, the two centrally symmetrical first arc holes 6 are respectively located on the upper and lower sides of the outer sleeve 41, and the two centrally symmetrical second arc holes 7 are respectively located on the upper and lower sides of the inner sleeve 51, and the front end hole wall of the upper second arc hole 7 and the rear end hole wall of the lower second arc hole 7 are both driving ends 71. When switching from the sitting state to the reclining state, the driving end 71 drives the connecting bolt 8 to rotate 15°, thereby causing the armrest to swing backward 15°, so that the angle between the armrest platform 1 and the horizontal plane is adjusted from 0° to 15°. The centrally symmetrical structural setting makes the adjustment process of the armrest more accurate, stable and controllable.

[0041] In this embodiment, the outer sleeve 41 and the inner sleeve 51 are metal sleeves, and a bushing 10 is arranged between the outer sleeve 41 and the inner sleeve 51. The bushing 10 is a plastic bushing fixedly connected to the outer sleeve 41. The plastic bushing plays a role in compensating for the gap and reducing noise, thereby avoiding contact between the outer sleeve 41 and the inner sleeve 51 and reducing the noise generated by relative rotation. A pair of centrally symmetrical arc-shaped clearance holes 101 are arranged on the bushing 10. The central angle of the arc-shaped clearance hole 101 is greater than the central angle of the first arc-shaped hole 6, so as to avoid interference with the movement of the connecting bolt 8.

[0042] In this embodiment, a decorative sleeve plug 11 is also included. The sleeve portion 3 has a through hole 113 that passes through the left and right sides. The connecting bolt 8 is a bolt. The diameter of the through hole 113 corresponds to the diameter of the bolt. The decorative sleeve plug 11 includes a plug cover 111 and a tube body 112 arranged on the inner side of the plug cover 111. The tube body 112 is provided with a clearance hole for the connecting bolt 8 to pass through and make way. The tube body 112 is installed in the inner sleeve 51. The plug cover 111 is matched with the hole seal on the outer side of the sleeve portion 3. This arrangement makes the assembly process between the armrest, the outer sleeve 41 and the inner sleeve 51 simpler and faster, the swing adjustment process of the armrest is more stable, and the overall appearance is more beautiful.

[0043] In this embodiment, a lifting support module is also included, which includes a supporting leg 14 and an outer supporting tube 15 arranged on the supporting leg 14, and a screw mechanism is arranged inside the outer supporting tube 15. The seating module 4 includes a seat frame 42 and a seat cushion 44 detachably mounted on the seat frame 42, and an inner supporting tube 43 is arranged at the bottom of the seat frame 42. The inner supporting tube 43 is inserted into the upper side of the inner part of the outer supporting tube 15, and a slider 20 is fixedly installed inside the inner supporting tube 43. The slider 20 is arranged on the screw mechanism for sliding up and down, thereby realizing the height adjustment of the seating module 4.

[0044] Specifically, the screw mechanism includes a fixed seat 16, a screw 17, and a first bevel gear 18 and a second bevel gear 19 installed in the fixed seat 16 and vertically transmission-matched, the first bevel gear 18 is connected to the outside, the second bevel gear 19 is fixedly connected to the bottom end of the screw 17, and the slider 20 is arranged outside the screw 17 to slide up and down. The first bevel gear 18 is rotated by the external hexagonal handle, thereby driving the second bevel gear 19 and the screw 17 to rotate, so that the slider 20 slides up or down along the screw 17, thereby realizing the height adjustment of the sitting module 4. Among them, the screw 17 includes a metal rod core and a plastic threaded sleeve coated on the outside of the metal rod core. This arrangement makes the screw 17 lighter and has a lower economic cost, making the sitting recliner lighter as a whole and convenient to carry.

[0045] In this embodiment, a footrest module is also included which is arranged below the seating module 4 and can slide and retract forward and backward. A guide tube 45 is arranged at the lower side of the seat frame 42. The footrest module includes two footrests 23, a longitudinal tube 21 and a transverse tube 22 which are T-shaped to each other. The longitudinal tube 21 is arranged in the guide tube 45 for sliding forward and backward. The guide tube 45 is used to guide and limit the longitudinal tube 21 forward and backward, and has a higher supporting strength. At the same time, it plays a certain protective role to prevent the longitudinal tube 21 from causing collision damage to the user's feet when sliding forward and backward. The two footrests 23 are respectively swung forward and backward. The footrest 23 is movably arranged on the left and right sides of the transverse tube 22, and the swing angle is 180°, that is, when the footrest 23 needs to be used, the footrest module is slid forward as a whole out from under the riding module 4, and then the footrest 23 is swung forward 180° to extend in front of the transverse tube 22, so as to lengthen the stroke and conveniently adapt to the leg lengths of different users. When the footrest 23 needs to be stored, the footrest 23 is swung backward 180° to the rear of the transverse tube 22, and then the footrest module is slid backward as a whole into the bottom of the riding module 4 to be hidden, and the overall occupied space is smaller.

[0046] In this embodiment, the backrest module 5 includes a backrest tube 52 arranged on the upper side of the inner sleeve 51, and the backrest tube 52 is provided with a height-adjustable back cushion 53, a lumbar support 54 and a headrest 55, and the headrest 55 and the lumbar support 54 are respectively located on the upper and lower sides of the back cushion 53, so that different users can adapt and adjust the height of the back cushion 53, the lumbar support 54 and the headrest 55 according to their height and body shape, so that the adaptability is better and the riding comfort is guaranteed, so that students can maintain a correct and healthy sitting posture and ensure the healthy development of the body. At the same time, when storing, it can also achieve the effect of reducing the occupied space.

[0047] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims will fall within the scope of protection of the present invention.

Claims

1. A reclining chair with multi-angle adjustable armrests, characterized in that: The invention comprises an armrest, a seating module and a backrest module rotatably arranged at the rear end of the seating module, an inner sleeve being arranged at the bottom end of the backrest module, an outer sleeve being arranged at the rear end of the seating module, the inner sleeve being rotatably arranged in the outer sleeve, the armrest comprising a swing arm and an armrest platform arranged at the top end of the swing arm, a sleeve portion being arranged at the bottom end of the swing arm, the sleeve portion being sleeved on the outside of the outer sleeve to realize relative rotation, at least one pair of first arc-shaped holes which are centrally symmetrical are arranged on the outer sleeve, at least one pair of second arc-shaped holes which are centrally symmetrical are arranged on the inner sleeve, a connecting bolt being installed in the sleeve portion, the connecting bolt passing through the first arc-shaped hole and the second arc-shaped hole, the first arc-shaped hole being used to limit the movable range of the connecting bolt, and thus limit the swing angle range of the armrest platform of the armrest, and a hole wall at one end of the second arc-shaped hole being a driving end, which is used to drive the connecting bolt to rotate, so that when switching from a sitting state to a reclining state, the armrest platform can swing backward following the seating module.

2. The reclining chair with multi-angle adjustable armrests according to claim 1, characterized in that: The angle adjustment range between the armrest platform and the horizontal plane when the reclining chair is in the reclining state does not exceed the angle adjustment range between the armrest platform and the horizontal plane when the reclining chair is in the sitting state.

3. The reclining chair with multi-angle adjustable armrests according to claim 1, characterized in that: The maximum angle between the armrest and the horizontal plane when the reclining chair is in the reclining state is equal to the maximum angle between the armrest and the horizontal plane when the reclining chair is in the sitting state, and the minimum angle between the armrest and the horizontal plane when the reclining chair is in the reclining state is greater than the minimum angle between the armrest and the horizontal plane when the reclining chair is in the sitting state.

4. The reclining chair with multi-angle adjustable armrests according to claim 1, characterized in that: There are two outer sleeves, which are respectively arranged on the left and right sides of the rear end of the riding module, and are coaxially sleeved on the left and right sides of the inner sleeve to achieve relative rotation.

5. The reclining chair with multi-angle adjustable armrests according to claim 4, characterized in that: Each outer sleeve is provided with a pair of first arc-shaped holes which are centrally symmetrical, and the left and right sides of the inner sleeve are respectively provided with a pair of second arc-shaped holes which are centrally symmetrical, and the first arc-shaped hole and the second arc-shaped hole which are matched on the same side are concentrically arranged, and the central angle of the second arc-shaped hole is greater than the central angle of the first arc-shaped hole.

6. The reclining chair with multi-angle adjustable armrests according to claim 5, characterized in that: The two centrally symmetrical first arc holes are respectively located on the upper and lower sides of the outer sleeve, and the two centrally symmetrical second arc holes are respectively located on the upper and lower sides of the inner sleeve. The front end hole wall of the upper second arc hole and the rear end hole wall of the lower second arc hole are both driving ends.

7. The reclining chair with multi-angle adjustable armrests according to claim 1, characterized in that: The outer sleeve and the inner sleeve are metal sleeves, a bushing is arranged between the outer sleeve and the inner sleeve, and the bushing is a plastic bushing fixedly connected to the outer sleeve.

8. The reclining chair with multi-angle adjustable armrests according to claim 1, characterized in that: It also includes a decorative sleeve plug, the sleeve part has a through hole that passes through the left and right sides, the connecting bolt is a bolt, the decorative sleeve plug includes a plug cover and a tube body arranged on the inner side of the plug cover, the tube body is provided with a clearance hole for the bolt to pass through, the tube body is installed in the inner sleeve, and the plug cover is matched with the hole opening on the outer side of the sleeve part.

9. The reclining chair with multi-angle adjustable armrests according to claim 1, characterized in that: It also includes a lifting support module, which includes a supporting leg and an outer supporting tube arranged on the supporting leg, a screw mechanism is arranged inside the outer supporting tube, and a seating module includes a seat frame and a seat cushion detachably mounted on the seat frame, an inner supporting tube is arranged at the bottom of the seat frame, the inner supporting tube is inserted into the upper side of the inner part of the outer supporting tube, a sliding block is fixedly installed inside the inner supporting tube, and the sliding block is arranged on the screw mechanism for sliding up and down.

10. The reclining chair with multi-angle adjustable armrests according to claim 9, characterized in that: The screw mechanism includes a fixed seat, a screw, and a first bevel gear and a second bevel gear installed in the fixed seat and vertically transmitted. The first bevel gear is connected to the outside, the second bevel gear is fixedly connected to the bottom end of the screw, and the slider is arranged outside the screw for sliding up and down. The screw includes a metal rod core and a plastic threaded sleeve covering the outside of the metal rod core.

11. The reclining chair with multi-angle adjustable armrests according to claim 9, characterized in that: It also includes a footrest module that is arranged below the seating module and can slide and retract forward and backward. A guide tube is arranged on the lower side of the seat frame. The footrest module includes two footrests, a longitudinal tube and a transverse tube that are T-shaped to each other. The longitudinal tube is arranged in the guide tube for sliding forward and backward, and two footrests are arranged on the left and right sides of the transverse tube for swinging forward and backward respectively.

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