Height-adjustable armrest for sofa and use thereof in nursing sofa

Abstract

The present invention relates to a height-adjustable armrest for a sofa, comprising an armrest base, an armrest plate, guide rods, an electric push rod, an armrest positioning and rotating assembly, a decoration assembly and a guide sleeve. The armrest base provides a mounting space and a supporting function. The guide rods are mounted below the armrest plate. The height-adjustable armrest for a sofa in the present invention can be particularly used as a height-adjustable armrest for a nursing sofa. According to present invention, stable movement of the armrest is achieved by means of the arrangement of the decoration assembly and the guide sleeve, rotation adjustment of the armrest plate is achieved by means of the armrest rotating assembly, the armrest has the advantages of being easy to adjust and convenient to operate and having high practicability; and the prepared nursing sofa is particularly suitable for pregnant women.

Description

A lifting armrest for sofa and its application in nursing chair sofa Technical Field

[0001] The invention relates to supporting components of a seat, in particular to a lifting armrest for a sofa and application of the armrest to a nursing chair. Background Art

[0002] Ergonomic chairs are engineered to perfectly suit the latest trends in furniture design. They offer excellent ventilation and heat dissipation, ensuring comfort and health, while preventing bacteria from growing in the chair during use. They also reduce pressure on the buttocks and back, press stress-bearing acupuncture points, promote blood circulation in the buttocks and back, and prevent strain on the neck, shoulders, and waist, helping to maintain a healthy physique. An ergonomic chair's structure includes a headrest, backrest, lumbar support, and armrests. The armrests are a crucial feature, providing support for the user's hands, allowing for greater relaxation and comfort, resulting in a superior user experience.

[0003] Traditional chair armrests are fixed and cannot be adjusted, making them inconvenient to use. Therefore, improved armrests generally feature a lift function to facilitate self-adjustment. However, these armrests are unstable during the lifting process and lack an armrest plate or are non-rotatable. For example, CN 210383319 U discloses a lifting armrest that uses a first hydraulic mechanism and a second hydraulic mechanism to achieve the lifting of the armrest. However, this fails to ensure the armrest's stability during the lifting process, hindering the user's experience and potentially increasing the risk of subsequent failures. Summary of the Invention

[0004] The first technical purpose of the present invention is to solve the problems in the background technology and provide a lifting armrest for a sofa.

[0005] The second technical purpose of the present invention is to solve the problems in the background technology and provide an application of a lifting armrest for a sofa.

[0006] The first technical purpose of the present invention is achieved through the following technical solutions:

[0007] A lifting armrest for a sofa, characterized by comprising an armrest base, an armrest plate, a guide rod, an electric push rod, an armrest positioning and rotating assembly, and a decorative assembly;

[0008] The armrest base provides a mounting location for the armrest plate, the guide rod, the electric push rod, the armrest positioning and rotating assembly, and the decorative assembly;

[0009] A fixing frame is provided inside the armrest base, a guide sleeve is provided on the outside of the fixing frame, and the guide sleeve is provided with a sleeve hole; a fixing frame connecting piece is provided at the bottom of the fixing frame; the armrest plate includes an upper armrest plate and a lower armrest plate; the lower armrest plate is provided with a lower armrest limiting hole; the bottom of the lower armrest plate is provided with a guide rod mounting opening;

[0010] The guide rods are fixed in parallel by fixing plates, the top of the guide rods is connected to a connecting plate, an electric push rod connecting plate is installed under the connecting plate, the bottom of the guide rod is installed in the sleeve hole of the guide sleeve, and the top of the guide rod is fixed to the lower armrest plate through the guide rod mounting port and the connecting plate;

[0011] The bottom of the electric push rod is installed on the fixing frame through the fixing frame connecting piece; the top of the electric push rod is connected to the connecting plate through the electric push rod connecting piece.

[0012] Preferably, the lower armrest plate is also provided with a decorative component installation opening and a positioning spring clamp.

[0013] Preferably, the top and bottom of the electric push rod are both provided with electric push rod connection holes, and the electric push rod is hingedly connected to the connecting plate and the fixing frame connecting piece through the electric push rod connection holes.

[0014] Preferably, the armrest positioning and rotating assembly includes a rotating iron plate, a friction ring, an angle limiter and a rotating bolt; the rotating iron plate is installed under the upper armrest plate; the top of the rotating bolt is fixed to the rotating iron plate, and the bottom is passed through the lower armrest limiting hole, and a control plane is provided on the side of the rotating bolt; the friction ring is provided between the lower armrest limiting hole and the rotating bolt; a socket and a flat mouth are provided in the middle of the angle limiter, a limiting block is provided on the outside of the angle limiter, the bottom of the rotating bolt is inserted into the socket of the angle limiter, the control plane is installed corresponding to the flat mouth, the end of the rotating bolt is fixed by a nut, and a limiting hole baffle is provided in the lower armrest limiting hole.

[0015] Preferably, the bottom of the rotating iron plate is provided with a plurality of positioning holes matching the positioning spring chucks.

[0016] Preferably, the decorative assembly includes a lifting decorative part and a decorative cover, and a lifting decorative part friction rib is provided at the bottom of the lifting decorative part; the decorative cover is installed on the top of the armrest base, and an anti-sway frame is provided inside the decorative cover, the top of the lifting decorative part is fixed to the lower armrest plate, and the bottom of the lifting decorative part is installed inside the decorative cover.

[0017] Preferably, the guide sleeve and the lower guide sleeve, and the upper guide sleeve and the lower guide sleeve are arranged up and down along the height direction of the fixing frame.

[0018] Preferably, the sofa lift armrest can be applied to the field of sofa lift armrests.

[0019] The second technical purpose of the present invention is achieved through the following technical solutions:

[0020] The invention discloses an application of a lifting armrest for a sofa, which is used for the lifting armrest of a nursing chair sofa. The nursing chair sofa prepared by the invention is particularly suitable for use by pregnant women.

[0021] In summary, the present invention has the following beneficial effects:

[0022] The sofa lifting armrest described in the present invention limits the movement of the guide rods during their descent to the bottom end by setting a guide sleeve on the fixed frame, so that the guide rods can move parallel to each other in the axial direction, achieving a more stable effect.

[0023] The sofa lifting armrest of the present invention reduces the shaking of the armrest by arranging the friction ribs and the anti-sway frame when the guide rod is extended to the longest position through the cooperation between the friction ribs and the inner wall of the anti-sway frame.

[0024] The sofa lifting armrest of the present invention realizes position adjustment of the armrest plate by setting the armrest rotating assembly, so that users have a better using experience.

[0025] The sofa lifting armrest of the present invention is particularly suitable for use as a lifting armrest of a nursing chair sofa, and is particularly suitable for use by pregnant women. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic structural diagram of a lifting armrest for a sofa according to the present invention;

[0027] FIG2 is a schematic diagram of the guide rod structure in the lifting armrest of a sofa according to the present invention;

[0028] FIG3 is a schematic diagram of the assembly structure of the armrest plate in the lifting armrest for a sofa according to the present invention;

[0029] FIG4 is a schematic diagram of the assembly of the armrest positioning and rotating assembly in the sofa lifting armrest of the present invention;

[0030] FIG5 is an enlarged schematic diagram of point A in FIG4 of the present invention;

[0031] FIG6 is a schematic diagram showing the rotation effect of the upper armrest of the sofa lifting armrest of the present invention;

[0032] FIG7 is a schematic diagram of the overall structure of the sofa lift armrest of the present invention;

[0033] FIG8 is a schematic diagram of a nursing chair according to the present invention. DETAILED DESCRIPTION

[0034] The following specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the embodiments as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0035] The present invention will be described in detail below with reference to the accompanying drawings using embodiments.

[0036] Example 1

[0037] As shown in Figures 1-5 and 7, a lifting armrest for a sofa includes an armrest base 1, an armrest plate 2, a guide rod 3, an electric push rod 4, an armrest positioning and rotating assembly 5, and a decorative assembly 6;

[0038] The armrest base 1 provides a mounting location for the armrest plate 2, guide rod 3, electric push rod 4, armrest positioning and rotating assembly 5 and decorative assembly 6;

[0039] The armrest base 1 is provided with a fixing frame 11, and a guide sleeve 7 is provided on the outside of the fixing frame 11, and the guide sleeve 7 is provided with a sleeve hole 73; a fixing frame connecting piece 111 is provided at the bottom of the fixing frame 11; the armrest plate 2 includes an upper armrest plate 21 and a lower armrest plate 22; the lower armrest plate 22 is provided with a lower armrest limiting hole 221; and a guide rod mounting opening 222 is provided at the bottom of the lower armrest plate 22;

[0040] The guide rods 3 are fixed in parallel by fixing plates 31. The top of the guide rods 3 is connected to a connecting plate 32. An electric push rod connecting plate 321 is installed under the connecting plate 32. The bottom of the guide rods 3 is installed in the sleeve hole 73 of the guide sleeve 7. The top of the guide rods 3 is fixed to the lower armrest plate 22 through the guide rod mounting opening 222 and the connecting plate 32.

[0041] The bottom of the electric push rod 4 is mounted on the fixing frame 11 via the fixing frame connecting piece 111 ; the top of the electric push rod 4 is connected to the connecting plate 32 via the electric push rod connecting piece 321 .

[0042] The lower armrest plate 22 is further provided with a decoration component installation opening 223 and a positioning spring clamp 224 .

[0043] The top and bottom of the electric push rod 4 are both provided with electric push rod connection holes 41 , and the electric push rod 4 is hingedly connected to the connection plate 32 and the fixing frame connection piece 111 through the electric push rod connection holes 41 .

[0044] The armrest positioning and rotating assembly 5 includes a rotating iron plate 51, a friction ring 52, an angle limiter 53 and a rotating bolt 54; the rotating iron plate 51 is installed under the upper armrest plate 21; the top of the rotating bolt 54 is fixed to the rotating iron plate 51, and the bottom is arranged through the lower armrest limiting hole 221, and a control plane 541 is provided on the side of the rotating bolt 54; the friction ring 52 is arranged between the lower armrest limiting hole 221 and the rotating bolt 54; a socket and a flat mouth 531 are provided in the middle of the angle limiter 53, and a limit stopper 532 is provided on the outside of the angle limiter 53. The bottom of the rotating bolt 54 is inserted into the socket of the angle limiter 53, the control plane 541 and the flat mouth 531 are installed correspondingly, the end of the rotating bolt 54 is fixed by a nut, and a limit hole baffle 2211 is provided in the lower armrest limiting hole 221.

[0045] A plurality of positioning holes 511 matching with the positioning spring clamps 224 are provided at the bottom of the rotating iron plate 51 .

[0046] When the armrest of the present invention rises, the electric push rod 4 lifts the connecting plate 32 at the top of the lifting guide rod 3 to raise the armrest board 2; when the armrest of the present invention rises and falls, the electric push rod 4 pulls down the connecting plate 32 at the top of the lifting guide rod 3 to lower the armrest board 2.

[0047] As shown in Figures 3-6, the upper and lower armrest panels 21 and 22 rotate and position with each other via the armrest positioning and rotation assembly 5. Rotation of the upper armrest panel 21 drives the rotating iron plate 51 and the rotating bolt 54. The angle limiter 53, in conjunction with the control plane 541 and the flat edge 531, also rotates. The limiter hole baffle 2211 and the limit block 532 limit the maximum rotation angle of the upper armrest panel 21. When the upper armrest panel 21 needs to be positioned, the positioning spring clamp 224 and the positioning hole 511 lock the upper armrest panel 21 into the desired position.

[0048] Example 2

[0049] As shown in FIG6 , the difference from the first embodiment is that the decorative assembly 6 includes a liftable decorative member 61 and a decorative cover 62. The bottom of the liftable decorative member 61 is provided with a liftable decorative member friction rib 611. The decorative cover 62 is mounted on the top of the armrest base 1 and includes an anti-sway frame 621. The top of the liftable decorative member 61 is fixed to the lower armrest plate 22, and the bottom of the liftable decorative member 61 is mounted within the decorative cover 62. The guide sleeve 7 includes an upper guide sleeve 71 and a lower guide sleeve 72, which are arranged vertically along the height of the fixing frame 11.

[0050] In this embodiment, when the armrest rises, when the bottom of the lifting guide rod 3 is separated from the lower guide sleeve 72, the friction rib 611 is just buckled into the anti-sway frame 621 in the decorative cover 62 to prevent sway; in this embodiment, when the armrest descends, when the friction rib 611 is separated from the anti-sway frame 621 in the decorative cover 62, the bottom of the lifting guide rod 3 is inserted into the lower guide sleeve 72 to prevent sway.

[0051] As shown in FIG8 , the sofa lift armrest of the present invention is particularly suitable for use as a lift armrest for a nursing chair sofa, and is particularly suitable for use by pregnant women.

Claims

1. A lifting armrest for a sofa, characterized in that: It includes an armrest base (1), an armrest plate (2), a guide rod (3), an electric push rod (4), an armrest positioning and rotating component (5) and a decorative component (6); The armrest base (1) provides an installation location for the armrest plate (2), the guide rod (3), the electric push rod (4), the armrest positioning rotation assembly (5), and the decorative assembly (6); The armrest base (1) is provided with a fixing frame (11), the outer side of the fixing frame (11) is provided with a guide sleeve (7), and the guide sleeve (7) is provided with a sleeve hole (73); the bottom of the fixing frame (11) is provided with a fixing frame connecting piece (111); the armrest plate (2) includes an upper armrest plate (21) and a lower armrest plate (22); the lower armrest plate (22) is provided with a lower armrest limiting hole (221); the bottom of the lower armrest plate (22) is provided with a guide rod mounting opening (222); The guide rods (3) are fixed in parallel via a fixing plate (31), the top of the guide rod (3) is connected to a connecting plate (32), an electric push rod connecting plate (321) is installed under the connecting plate (32), the bottom of the guide rod (3) is installed in the sleeve hole (73) of the guide sleeve (7), and the top of the guide rod (3) is fixed to the lower armrest plate (22) via the guide rod mounting opening (222) and the connecting plate (32); The bottom of the electric push rod (4) is mounted on the fixing frame (11) via the fixing frame connecting piece (111); the top of the electric push rod (4) is connected to the connecting plate (32) via the electric push rod connecting piece (321).

2. The sofa lift armrest according to claim 1, characterized in that: The lower armrest plate (22) is also provided with a decoration piece installation opening (223) and a positioning spring clamp (224).

3. The sofa lift armrest according to claim 1, characterized in that: The top and bottom of the electric push rod (4) are both provided with electric push rod connection holes (41), and the electric push rod (4) is hingedly connected to the connection plate (32) and the fixing frame connection piece (111) through the electric push rod connection holes (41).

4. The sofa lift armrest according to claim 1, characterized in that: The armrest positioning rotation assembly (5) includes a rotating iron plate (51), a friction ring (52), an angle limiter (53) and a rotating bolt (54); the rotating iron plate (51) is installed under the upper armrest plate (21); the top of the rotating bolt (54) is fixed to the rotating iron plate (51), and the bottom is arranged through the lower armrest limiting hole (221); the side of the rotating bolt (54) is provided with a control plane (541); the friction ring (52) is arranged in the lower armrest limiting hole (221) ) and the rotating bolt (54); a socket and a flat mouth (531) are provided in the middle of the angle limiting member (53); a limit stopper (532) is provided on the outside of the angle limiting member (53); the bottom of the rotating bolt (54) is inserted into the socket of the angle limiting member (53); the control plane (541) and the flat mouth (531) are installed correspondingly; the end of the rotating bolt (54) is fixed by a nut; a limit hole baffle (2211) is provided in the lower handrail limit hole (221).

5. The sofa lift armrest according to claim 5, characterized in that: The bottom of the rotating iron plate (51) is provided with a plurality of positioning holes (511) that match the positioning spring clamps (224).

6. The sofa lift armrest according to claim 1, characterized in that: The decorative assembly (6) includes a lifting decorative part (61) and a decorative cover (62), wherein a lifting decorative part friction rib (611) is provided at the bottom of the lifting decorative part (61); the decorative cover (62) is mounted on the top of the armrest base (1), an anti-sway frame (621) is provided inside the decorative cover (62), the top of the lifting decorative part (61) is fixed to the lower armrest plate (22), and the bottom of the lifting decorative part (61) is mounted inside the decorative cover (62).

7. The sofa lift armrest according to claim 1, characterized in that: The guide sleeve (7) comprises an upper guide sleeve (71) and a lower guide sleeve (72), and the upper guide sleeve (71) and the lower guide sleeve (72) are arranged vertically along the height direction of the fixing frame (11).

8. An application of a sofa lift armrest according to any one of claims 1 to 7, characterized in that: Liftable armrests for nursing chair sofas.

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