Sofa leisure chair with adjustable backrest angle

Abstract

The utility model discloses a sofa leisure chair with an adjustable backrest angle, which comprises a chair body (1), armrests (2) are arranged on the left side and the right side of the chair body (1), a backrest (3) connected through a first rotating shaft (9) is arranged on the rear side of the chair body (1), and a foot support (4) connected through a second rotating shaft (10) is arranged on the front side of the chair body (1). An adjusting mechanism for driving the angle of the backrest (3) to be adjusted is arranged in the armrest (2) and comprises a driven wheel (8) arranged on one side of the first rotating shaft (9), a plurality of groups of uniformly distributed matching grooves (11) are formed in the surface of the driven wheel (8), a driving wheel (6) is arranged on one side of the driven wheel (8), a driving shaft (7) corresponding to the matching grooves (11) is arranged on the edge of the driving wheel (6), and a pinion (24) is arranged on one side of the driven wheel (8). The chair has the advantages that the backrest and the foot support are convenient to adjust, and comfort is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sofa leisure chair, especially a sofa leisure chair with adjustable backrest angle. BACKGROUND

[0002] The sofa leisure chair is a kind of household seat that combines the comfort of sofa and the flexibility of leisure chair, designed for relaxation, reading or rest, commonly found in living room, balcony or study. The backrest of traditional sofa chair is designed with fixed angle, which cannot meet the ergonomic needs in different scenarios (such as reading, resting, entertainment), and long-term single posture can easily lead to spinal fatigue, so a sofa leisure chair with adjustable backrest angle is needed. SUMMARY

[0003] The utility model aims at providing a sofa leisure chair with adjustable backrest angle. It has the advantages of convenient backrest and footrest adjustment, improving comfort.

[0004] The utility model discloses a sofa leisure chair with adjustable backrest angle, which comprises a chair body, a handrail is arranged on the left and right sides of the chair body, a backrest is connected to the rear side of the chair body through a first rotating shaft, and a footrest is connected to the front side of the chair body through a second rotating shaft.

[0005] A adjusting mechanism for driving the backrest angle adjustment is arranged in the handrail, which comprises a driven wheel arranged on one side of the first rotating shaft, a plurality of uniformly distributed matching grooves are arranged on the surface of the driven wheel, a driving wheel is arranged on one side of the driven wheel, a driving shaft corresponding to the matching grooves is arranged on the edge of the driving wheel, a small gear coaxially arranged with the first rotating shaft is arranged on one side of the driven wheel, and a large gear coaxially arranged with the first rotating shaft is arranged on one side of the small gear.

[0006] A ratchet lock structure is arranged on one side of the adjusting mechanism, and a linkage mechanism for synchronously rotating the first rotating shaft and the second rotating shaft is arranged at the other end of the first rotating shaft.

[0007] In the foregoing sofa leisure chair with adjustable backrest angle, the ratchet lock structure comprises a ratchet wheel arranged at the end of the first rotating shaft, a pawl for locking the ratchet wheel is arranged on one side of the ratchet wheel, a lever for pushing the pawl is arranged on one side of the pawl, and the outer end of the lever is exposed outside the handrail.

[0008] In the foregoing sofa leisure chair with adjustable backrest angle, the linkage mechanism comprises a first pulley arranged outside the first rotating shaft and a second pulley arranged outside the second rotating shaft, a transmission belt is arranged outside the first pulley and the second pulley, a mounting seat fixed in the handrail is arranged on one side of the first pulley, a key groove is arranged on the interface between the first pulley and the first rotating shaft, and a detachable key is arranged in the key groove.

[0009] The outer side of the armrest is provided with a mounting groove corresponding to the first pulley position, a detachable end cover is arranged in the mounting groove, the end cover is fixedly connected with a key, and the outer side of the mounting groove is provided with an indication strip corresponding to the number of matching grooves.

[0010] Compared with the prior art, the adjustable backrest angle sofa leisure chair has the following advantages:

[0011] The driving wheel, the driving shaft and the driven wheel cooperate to form a Geneva mechanism, and cooperate with a speed reduction gear, so that the first rotating shaft rotates in stages, thereby adjusting the backrest angle, and the side of the adjusting mechanism is provided with a ratchet locking structure for locking the backrest angle, and the linkage mechanism can link the first rotating shaft and the second rotating shaft, thereby simultaneously adjusting the backrest and the foot support angle, and the comfort is better, and the backrest and the foot support angle can be adjusted by the key. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural schematic view of the utility model;

[0013] Figure 2 is a partial enlarged view of the utility model;

[0014] Figure 3 is a structural schematic view of the utility model;

[0015] Figure 4 is a structural schematic view of the utility model.

[0016] The marks in the drawings are: 1-chair body, 2-armrest, 3-backrest, 4-foot support, 6-driving wheel, 7-driving shaft, 8-driven wheel, 9-first rotating shaft, 10-second rotating shaft, 11-matching groove, 12-ratchet, 13-ratchet pawl, 14-first pulley, 15-mounting seat, 16-key groove, 17-key, 18-second pulley, 19-transmission belt, 20-end cover, 21-mounting groove, 22-indication strip, 23-pull rod, 24-small gear, 25-large gear. DETAILED DESCRIPTION

[0017] The utility model will be further described below in combination with the drawings and examples, but not as the basis for limiting the utility model.

[0018] Example 1. An adjustable backrest angle sofa leisure chair, as shown in Figures 1-4 is shown, comprising a chair body 1, the left and right sides of the chair body 1 are provided with armrests 2, the rear side of the chair body 1 is provided with a backrest 3 connected through a first rotating shaft 9, and the front side of the chair body 1 is provided with a foot support 4 connected through a second rotating shaft 10;

[0019] The armrest 2 is provided with an adjusting mechanism for driving the angle adjustment of the backrest 3, which comprises a driven wheel 8 arranged on one side of the first rotating shaft 9, the surface of the driven wheel 8 is provided with a plurality of uniformly distributed matching grooves 11, one side of the driven wheel 8 is provided with a driving wheel 6, the edge of the driving wheel 6 is provided with a driving shaft 7 corresponding to the matching grooves 11, one side of the driven wheel 8 is provided with a coaxially arranged pinion 24, one side of the pinion 24 is provided with a gear wheel 25 coaxially arranged with the first rotating shaft 9;

[0020] One side of the adjusting mechanism is provided with a ratchet locking structure, the other end of the first rotating shaft 9 is provided with a linkage mechanism for synchronously rotating the first rotating shaft 9 and the second rotating shaft 10.

[0021] The ratchet locking structure comprises a ratchet wheel 12 arranged at the end of the first rotating shaft 9, one side of the ratchet wheel 12 is provided with a pawl 13 for locking the ratchet wheel 12, one side of the pawl 13 is provided with a lever 23 for driving the pawl 13, the outer end of the lever 23 is exposed outside the armrest 2.

[0022] The linkage mechanism comprises a first pulley 14 arranged outside the first rotating shaft 9 and a second pulley 18 arranged outside the second rotating shaft 10, the first pulley 14 and the second pulley 18 are provided with a transmission belt 19 outside, one side of the first pulley 14 is provided with a mounting seat 15 fixed in the armrest 2, the interface between the first pulley 14 and the first rotating shaft 9 is provided with a key groove 16, and the key groove 16 is provided with a detachable key 17.

[0023] The diameter of the first pulley 14 is greater than or equal to the diameter of the second pulley 18. Specifically, the diameter of the first pulley 14 can be twice or one time of the diameter of the second pulley 18.

[0024] The armrest 2 is provided with a mounting groove 21 corresponding to the position of the first pulley 14, the mounting groove 21 is provided with a detachable end cover 20, the end cover 20 is fixedly connected with the key 17, and the outer side of the mounting groove 21 is provided with an indication strip 22 corresponding to the number of the matching grooves 11.

[0025] The utility model discloses a principle: the application is used through the drive wheel 6 drive driven wheel 8 movement, make drive shaft 7 with the cooperation groove 11 cooperation, form geneva mechanism, make driven wheel 8 have stage rotation, and through the cooperation of the large gear and the pinion, drive first rotary shaft 9 with the backrest 3 angle adjustment. Drive wheel 6 can be driven by motor, or by the rocker that is coaxial with drive wheel 6 sets up. Ratchet lock structure includes the ratchet wheel 12 that is coaxial with first rotary shaft 9 sets up, and the ratchet wheel can be one-way ratchet wheel, and the direction of ratchet wheel 12 and pawl 13 is the direction of preventing backrest 3 continue to fall backward, when using, through the lever 23 drive pawl 13 movement, avoid the influence backrest 3 falls backward. The first rotary shaft 9 position of the application can be directly adjusted, therefore when installing end cover 20, there is keyway 16 and key positioning difficult problem, therefore the application is set up in the installation groove 21 outer instruction strip 22, the key is installed conveniently, and because the application is through geneva mechanism and forms stage adjustment, positioning is more accurate.

[0026] The application uses mainly have sitting and lying two purposes, when sitting, only need to adjust the angle of backrest 3, at this time can remove the end cover 20 of linkage mechanism, after removing end cover 20, key 17 is separated from keyway 16, make first pulley 14 and first rotary shaft 9 independent, namely first rotary shaft 9 rotates and will not drive first pulley 14 movement, so that when adjusting the angle of backrest 3, the angle of foot support 4 will not change, first pulley 14 is the pulley with annular groove on one side, can be installed with mounting seat 15, and mounting seat 15 plays the role of supporting and fixing first pulley 14.

[0027] When lying, if the application needs backrest 3 and foot support 4 to be flush with the chair surface of chair body 1, then first pulley 14 and second pulley 18 with equal diameter can be used, and key 17 is connected in keyway 16, so that in the process of first rotary shaft 9 movement, first pulley 14, second pulley 18 and transmission belt 19 can drive second rotary shaft 10 synchronous movement, so that backrest 3 and foot support 4 are flush with the chair surface of chair body 1.

[0028] Further, the application can adjust the angle of backrest when sitting and lying according to the preference of user, generally, when sitting, foot support 4 is perpendicular to the chair surface, when lying, backrest 3 can not need to be completely laid down, then after making foot support 4 flush with the chair surface of chair body 1, end cover 20 is removed, key 17 is separated from keyway 16, then the drive wheel 6 is rotated, first rotary shaft 9 is rotated through the action of drive shaft 7 and cooperation groove 11, the adjustment of backrest angle is realized, further, one side of second rotary shaft 10 is also provided with ratchet lock structure, which avoids the reset of foot support 4 when adjusting the angle of backrest 3.

Claims

1. A reclining chair with adjustable backrest angle, characterized in that: The chair body (1) is provided with armrests (2) on both sides, a backrest (3) connected by a first rotating shaft (9) at the back, and a foot support (4) connected by a second rotating shaft (10) at the front. The armrest (2) is provided with a regulating mechanism for driving the backrest (3) to adjust the angle, which comprises a driven wheel (8) arranged on one side of the first rotating shaft (9), a plurality of uniformly distributed matching grooves (11) arranged on the surface of the driven wheel (8), a driving wheel (6) arranged on one side of the driven wheel (8), a driving shaft (7) arranged on the edge of the driving wheel (6) corresponding to the matching grooves (11), a pinion (24) arranged coaxially on one side of the driven wheel (8), and a gear (25) arranged coaxially on one side of the pinion (24) corresponding to the first rotating shaft (9). One side of the regulating mechanism is provided with a ratchet locking structure, and the other end of the first rotating shaft (9) is provided with a linkage mechanism for synchronously rotating the first rotating shaft (9) and the second rotating shaft (10).

2. The reclining angle-adjustable sofa lounge chair according to claim 1, characterized in that: The ratchet locking structure comprises a ratchet (12) arranged at the end of the first rotating shaft (9), a pawl (13) arranged on one side of the ratchet (12) for locking the ratchet (12), a lever (23) arranged on one side of the pawl (13) for driving the pawl (13), and the outer end of the lever (23) exposed outside the armrest (2).

3. The reclining angle adjustable sofa lounge chair according to claim 1, wherein: The linkage mechanism comprises a first pulley (14) arranged outside the first rotating shaft (9) and a second pulley (18) arranged outside the second rotating shaft (10), a transmission belt (19) arranged outside the first pulley (14) and the second pulley (18), an installation seat (15) fixed in the armrest (2) arranged on one side of the first pulley (14), a key groove (16) arranged on the interface between the first pulley (14) and the first rotating shaft (9), and a detachable key (17) arranged in the key groove (16).

4. The reclining angle adjustable sofa lounge chair according to claim 1, wherein: The armrest (2) is provided with an installation groove (21) corresponding to the position of the first pulley (14) outside, a detachable end cover (20) arranged in the installation groove (21), and the end cover (20) is fixedly connected with the key (17), and the installation groove (21) is provided with an indicating strip (22) corresponding in number to the matching grooves (11) outside.

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