An armrest lifting mechanism and sofa structure

Abstract

This utility model relates to the field of furniture technology, and in particular to an armrest lifting mechanism and sofa structure. The armrest lifting mechanism includes: a lifting drive component, configured to be fixedly connected within the sofa armrest frame; a rotating seat, fixedly connected to the top of the lifting drive component and moving vertically with the lifting drive component; and an armrest support plate, the bottom of which is rotatably connected to the rotating seat, and the top of which is used to connect to the armrest body. A damping rotation connection structure is provided between the armrest support plate and the rotating seat. This damping rotation connection structure is configured to allow the armrest support plate to rotate around a vertical axis in a horizontal plane to a set angle position under external force, and to stably position the armrest support plate at the rotated set angle position when the external force is removed. This structural design expands the user's activity space after the armrest is raised, and the inward rotation of the armrest provides more comfortable usage scenarios, improving user comfort.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to an armrest lifting mechanism and a sofa structure. Background Technology

[0002] As a frequently used piece of leisure furniture in the home, modern families have increasingly higher requirements for the functionality and comfort of sofas. Especially in special application scenarios such as maternal and infant care and elderly care, traditional sofas often cannot meet users' dual requirements for the flexibility and functionality of sofas.

[0003] In the prior art, such as Chinese utility model patent with publication number CN223126139U, disclosed on July 22, 2025, a sofa with a liftable armrest panel is provided. It improves the convenience of opening the armrest panel by forming an upward-opening storage cavity in the main body of the sofa armrest and connecting the armrest main body and the armrest panel through a lifting component. The lifting component drives the armrest main body to rise to expose the opening of the storage cavity.

[0004] However, the aforementioned sofa structure with adjustable armrests still has obvious defects. For example, in the context of maternal and infant care, after the main body of the armrest is raised, the raised armrest causes obstacles to the user's upper limb movement or a sense of spatial oppression. Furthermore, the raised armrest increases the distance between itself and the user's upper limbs, making it difficult for the user to use the armrest to perform operations such as holding the baby or feeding the baby, thus affecting the user's comfort. Utility Model Content

[0005] In view of at least one of the above technical problems, the present invention provides an armrest lifting mechanism and a sofa structure, which improves the user's comfort by adopting structural improvements.

[0006] According to a first aspect of the present invention, a handrail lifting mechanism is provided, comprising:

[0007] The lifting drive component is configured to be fixedly connected to the sofa armrest frame;

[0008] The rotating seat is fixed to the top of the lifting drive component and moves up and down in the vertical direction along with the lifting drive component;

[0009] The bottom of the armrest support plate is rotatably connected to the rotating seat, and the top is used to connect to the armrest body.

[0010] A damped rotational connection structure is provided between the armrest support plate and the rotating seat, and the damped rotational connection structure is configured as follows:

[0011] The armrest support plate can be rotated around the vertical axis in the horizontal plane to a set angle position under the action of external force, and when the external force is removed, the armrest support plate is stably positioned at the set angle position after rotation.

[0012] Furthermore, the damping rotation connection structure is a friction damping connection structure, and there is a contactable friction surface between the armrest support plate and the rotating seat.

[0013] Furthermore, the damping rotation connection structure includes a rotating shaft disposed at the center of the rotating seat and a positioning ring disposed around the rotating shaft;

[0014] The damping rotation connection structure also includes a bushing disposed on the handrail support plate and a positioning rod extending radially along the bushing;

[0015] The bushing is fitted onto the rotating shaft, and the end of the positioning rod away from the bushing abuts against the inner wall of the positioning ring.

[0016] Furthermore, the inner wall of the positioning ring is arrayed with concave arc-shaped grooves, and the end of the positioning rod that contacts the arc-shaped groove has an arc-shaped protrusion that matches the arc-shaped groove.

[0017] Furthermore, the positioning rod has a straight, diamond, W-shaped, or T-shaped structure.

[0018] Furthermore, the positioning rods are symmetrically arranged on both sides of the bushing.

[0019] Furthermore, the side of the armrest support plate facing the rotating seat also has a positioning cover that can be placed over the outside of the positioning ring, and the positioning cover can be rotated relative to the positioning ring.

[0020] Furthermore, the damping rotation connection structure also includes a rotation limiting structure to limit the rotation angle of the armrest support plate relative to the rotating seat.

[0021] Furthermore, the rotation limiting structure includes a limiting retaining ring fixed to the periphery of the positioning ring and a limiting groove formed on the periphery of the positioning rod. The limiting retaining ring is generally elliptical, and its length dimension on the rotating seat is greater than its width dimension. The limiting groove includes two semi-elliptical cavities symmetrically joined together in the length direction. The two ends of the limiting retaining ring in the length direction are respectively disposed in the two semi-elliptical cavities, and the two ends of the limiting retaining ring can only be rotatably disposed within their respective semi-elliptical cavities.

[0022] According to a second aspect of the present invention, a sofa structure is provided, including an armrest lifting mechanism as described in any one of the first aspects.

[0023] The beneficial effects of this utility model are as follows: By setting a relatively rotatable handrail support plate on the rotating seat that follows the lifting drive, the handrail body fixed on the handrail support plate can rotate relatively. Furthermore, through the setting of the damping rotation connection structure, the handrail can be stably positioned after being adjusted to a suitable angle. This structural setting can expand the user's activity space after the handrail is raised, and can also provide users with more comfortable usage scenarios through the inward rotation of the handrail. Compared with the prior art, it improves the user's comfort. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the handrail lifting mechanism in an embodiment of the present utility model;

[0026] Figure 2 This is an exploded structural diagram of the handrail lifting mechanism in an embodiment of this utility model;

[0027] Figure 3 This is an exploded view of the connection between the rotating seat and the armrest support plate in an embodiment of this utility model.

[0028] Figure 4 This is a cross-sectional view of the rotating seat and armrest support plate in an embodiment of this utility model;

[0029] Figure 5 This is a cross-sectional view of the armrest support plate rotating relative to the rotating seat in an embodiment of this utility model.

[0030] Figure 6 This is a schematic diagram of another form of handrail support plate in an embodiment of this utility model;

[0031] Figure 7 This is a schematic diagram of the deformed structure of the armrest support plate positioning rod in an embodiment of this utility model;

[0032] Figure 8 This is another modified structural form of the positioning rod of the armrest support plate in the embodiments of this utility model;

[0033] Figure 9 This is a schematic diagram of the sofa structure in an embodiment of the present utility model;

[0034] Figure 10This is a schematic diagram of the structure of the handrail body when it is raised and rotated in an embodiment of this utility model.

[0035] Explanation of reference numerals in the attached drawings: 1. Lifting drive component; 2. Rotating seat; 3. Handrail support plate; 4. Damping rotation connection structure; 41. Rotating shaft; 42. Positioning ring; 42a. Arc groove; 43. Bushing; 44. Positioning rod; 44a. Arc protrusion; 44b. Extension rod; 44c. Spring arm; 45. Positioning cover; 46. Limiting retaining ring; 47. Limiting groove; 471. Semi-elliptical cavity; 10. Handrail frame; 30. Handrail body. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] like Figures 1 to 8 The handrail lifting mechanism shown includes a lifting drive component 1, a rotating base 2, and a handrail support plate 3, as detailed below. Figure 1 and Figure 2 As shown in the figure, in this embodiment of the present invention, the lifting drive component 1 is configured to be fixedly connected to the sofa armrest frame 10. It should be noted that in this embodiment of the present invention, the lifting drive component 1 has various structural forms, such as gas springs, screw lifting column structures, or electric push rod structures in the prior art. Those skilled in the art can choose according to their needs. The connection methods between the lifting drive component 1 and the armrest frame 10 are also varied. For example, it can be detachably connected by bolts using a connecting plate, or it can be fixed by snap-fitting or welding. Furthermore, it should be noted that in this embodiment of the present invention, the shape of the lifting drive component 1 is not limited; it can be as follows: Figure 1 The ellipse shown can also be a circle or other polygonal structure; in the structure of the electric actuator, the geared motor used for driving can be a brushed motor or a brushless motor.

[0040] The rotating seat 2 is fixed to the top of the lifting drive component 1 and moves up and down vertically along with the lifting drive component 1. In this embodiment of the utility model, an electric push rod is used as an example. The rotating seat 2 is fixed to the top of the electric push rod, and when the electric push rod is activated, it drives the rotating seat 2 to move up and down accordingly. Please continue to refer to... Figure 2 In an embodiment of this utility model, the bottom of the armrest support plate 3 is rotatably connected to the rotating seat 2, and the top is used to connect to the armrest body 30.

[0041] In an embodiment of this utility model, a damping rotation connection structure 4 is provided between the armrest support plate 3 and the rotating seat 2. The damping rotation connection structure 4 is configured to allow the armrest support plate 3 to rotate around a vertical axis in a horizontal plane to a set angle position under the action of external force, and to stably position the armrest support plate 3 at the rotated set angle position when the external force is removed. It should be noted that in an embodiment of this utility model, there are various ways to implement the damping rotation connection structure 4. For example, the above function can be achieved through a silicone friction damping structure, a magnetohydrodynamic damping structure, a spring plus friction plate structure, or a bidirectional damping rotation hinge, etc. Those skilled in the art can choose according to their needs.

[0042] In the embodiments of this utility model, by setting a relatively rotatable handrail support plate 3 on the rotating seat 2 that follows the lifting drive 1, the handrail body 30 fixed on the handrail support plate 3 can rotate relatively. Furthermore, by setting a damping rotation connection structure 4, the handrail can be stably positioned after being adjusted to a suitable angle. Through this structural setting, the user's activity space after the handrail is raised can be expanded, and the inward rotation of the handrail can also provide users with more comfortable usage scenarios. Compared with the prior art, the user's comfort is improved.

[0043] Based on the above embodiments, and considering both cost and performance, in this embodiment of the invention, the damping rotation connection structure 4 is a friction damping connection structure, with a contactable friction surface between the armrest support plate 3 and the rotating seat 2. The specific structural form of the damping rotation connection structure 4 is exemplarily described in the following embodiments of the invention, such as... Figure 3As shown in the embodiment of this utility model, the damping rotation connection structure 4 includes a rotating shaft 41 disposed at the center of the rotating seat 2 and a positioning ring 42 disposed around the rotating shaft 41; it should be noted that in the embodiment of this utility model, the rotating shaft 41 can be fixed on the rotating seat 2 or rotatably connected to the rotating seat 2; the damping rotation connection structure 4 also includes a bushing 43 disposed on the armrest support plate 3 and a positioning rod 44 extending radially along the bushing 43; as Figure 3 and Figure 4 As shown in the embodiment of this utility model, the bushing 43 is sleeved on the rotating shaft 41, and the end of the positioning rod 44 away from the bushing 43 abuts against the inner wall of the positioning ring 42. By sleeved on the rotating shaft 41, the armrest support plate 3 can rotate relative to the rotating seat 2. Through the abutment between the positioning rod 44 and the inner wall of the positioning ring 42, friction is generated between the armrest support plate 3 and the rotating seat 2. When the external force is greater than the friction force, the armrest support plate 3 can rotate relative to the rotating seat 2. When the external force is removed, the friction force prevents the armrest support plate 3 from rotating relative to the rotating seat 2. The specific magnitude of the friction force can be adjusted by those skilled in the art according to needs.

[0044] Please continue to refer to Figure 4 In this embodiment of the invention, the inner wall of the positioning ring 42 is arrayed with concave arc-shaped grooves 42a, and the end of the positioning rod 44 that contacts the arc-shaped grooves 42a has an arc-shaped protrusion 44a that matches the arc-shaped grooves 42a. The arc-shaped grooves and protrusions 44a, when the armrest support plate 3 rotates, cause the arc-shaped protrusion 44a to make a crackling sound as it moves from one arc-shaped groove 42a to another. Furthermore, the arc-shaped grooves 42a also make the positioning of the armrest support plate 3 more stable.

[0045] In embodiments of this utility model, to improve the stability of the contact between the positioning rod 44 and the arc-shaped groove 42a, such as... Figure 4 As shown, the positioning rod 44 is T-shaped, including an extension rod 44b extending radially along the bushing 43 and a spring arm 44c perpendicular to the extension rod 44b in the middle. Arc-shaped protrusions 44a are located at both ends of the spring arm 44c, and the arc-shaped protrusions 44a are engaged within arc-shaped grooves 42a. The spring arm 44c can deform in a direction away from or towards the arc-shaped groove 42a. Through the T-shaped structure, the arc-shaped protrusions 44a on both sides of the armrest support plate 3 can bear force regardless of whether it rotates forward or backward. Furthermore, in this embodiment of the invention, the positioning rods 44 are symmetrically arranged on both sides of the bushing 43. This structural design allows four arc-shaped protrusions 44a on the inner wall of the positioning ring 42 to limit the positioning of the armrest support plate 3, thereby improving the positioning reliability of the armrest support plate 3.

[0046] Furthermore, in some embodiments of this utility model, the positioning rod 44 has various structural forms; please refer to [the relevant documentation]. Figures 6 to 8 Positioning rod 44 can also be as follows: Figure 6 The one-line shape shown, such as Figure 7 The rhombus shown, and as Figure 8 The W-shaped structure shown here; it should be noted that the straight type is a crossbar structure extending radially along the bushing 43, with the arc-shaped protrusion 44a fixed on the free end of the crossbar; the diamond structure refers to the positioning rod 44 having an overall diamond frame structure, with the arc-shaped protrusion 44a located at the connection of the two sides at the end away from the bushing 43; the W-shaped structure refers to the positioning rod 44 having a structure in which the far end is two V-shaped splices, with the arc-shaped protrusion 44a located on the free end of the outer wall of the two V-shapes. Through the above structural modifications, more positioning forms can be provided to improve the reliability and stability of positioning.

[0047] Please continue to refer to Figure 3 and Figure 4 In this embodiment of the invention, to further improve the rotational stability of the armrest support plate 3, the side of the armrest support plate 3 facing the rotating seat 2 also has a positioning cover 45 that can be placed over the outside of the positioning ring 42. The positioning cover 45 is rotatably arranged relative to the positioning ring 42. By providing the positioning cover 45, when the armrest support plate 3 rotates, in addition to the cooperation between the rotating shaft 41 and the bushing 43, a coaxial rotational constraint is formed between the positioning cover 45 and the outer wall of the positioning ring 42, thereby improving the rotational stability of the armrest support plate 3, and also improving the operational stability of the rotating shaft 41 and the bushing 43.

[0048] In embodiments of this utility model, to prevent excessive rotation of the armrest support plate 3, a limiting structure is also provided to limit the rotation angle of the armrest support plate 3. The damping rotation connection structure 4 also includes a rotation limiting structure to limit the rotation angle of the armrest support plate 3 relative to the rotating seat 2. In some exemplary embodiments of this utility model, such as Figure 4 and Figure 5 As shown, the rotation limiting structure includes a limiting retaining ring 46 fixed to the periphery of the positioning ring 42 and a limiting groove 47 formed on the periphery of the positioning rod 44. The limiting retaining ring 46 is generally elliptical, and its length dimension on the rotating seat 2 is greater than its width dimension. The limiting groove 47 includes two semi-elliptical cavities 471 symmetrically joined in the length direction. The two ends of the limiting retaining ring 46 in the length direction are respectively set in the two semi-elliptical cavities 471, and the two ends of the limiting retaining ring 46 can only be rotatably set within their respective semi-elliptical cavities 471. Through this structural design, the unidirectional rotation angle of the armrest support plate 3 is no more than 90 degrees, thereby providing a more stable support effect.

[0049] Please refer to Figure 9 and Figure 10 In an embodiment of this utility model, a sofa structure is also provided, including the aforementioned armrest lifting mechanism. Furthermore, it should be noted that the control of the armrest lifting mechanism can be integrated into the armrest frame 10, or it can be controlled via a remote control.

[0050] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A handrail lifting mechanism, characterized in that, include: The lifting drive component is configured to be fixedly connected to the sofa armrest frame; The rotating seat is fixed to the top of the lifting drive component and moves up and down in the vertical direction along with the lifting drive component; The bottom of the armrest support plate is rotatably connected to the rotating seat, and the top is used to connect to the armrest body. A damped rotational connection structure is provided between the armrest support plate and the rotating seat, and the damped rotational connection structure is configured as follows: The armrest support plate can be rotated around the vertical axis in the horizontal plane to a set angle position under the action of external force, and when the external force is removed, the armrest support plate is stably positioned at the set angle position after rotation.

2. The handrail lifting mechanism according to claim 1, characterized in that, The damping rotation connection structure is a friction damping connection structure, and there is a contactable friction surface between the handrail support plate and the rotating seat.

3. The handrail lifting mechanism according to claim 1, characterized in that, The damping rotation connection structure includes a rotating shaft disposed at the center of the rotating seat and a positioning ring disposed around the rotating shaft; The damping rotation connection structure also includes a bushing disposed on the handrail support plate and a positioning rod extending radially along the bushing; The bushing is fitted onto the rotating shaft, and the end of the positioning rod away from the bushing abuts against the inner wall of the positioning ring.

4. The handrail lifting mechanism according to claim 3, characterized in that, The inner wall of the positioning ring is arrayed with concave arc-shaped grooves, and the end of the positioning rod that contacts the arc-shaped groove has an arc-shaped protrusion that matches the arc-shaped groove.

5. The handrail lifting mechanism according to claim 4, characterized in that, The positioning rod has a straight, diamond, W, or T-shaped structure.

6. The handrail lifting mechanism according to claim 5, characterized in that, The positioning rods are symmetrically arranged on both sides of the bushing.

7. The handrail lifting mechanism according to claim 3, characterized in that, The armrest support plate also has a positioning cover on the side facing the rotating seat, which can be placed over the outside of the positioning ring. The positioning cover can be rotated relative to the positioning ring.

8. The handrail lifting mechanism according to claim 3, characterized in that, The damping rotation connection structure also includes a rotation limiting structure to limit the rotation angle of the armrest support plate relative to the rotating seat.

9. The handrail lifting mechanism according to claim 8, characterized in that, The rotation limiting structure includes a limiting retaining ring fixed to the periphery of the positioning ring and a limiting groove formed on the periphery of the positioning rod. The limiting retaining ring is generally elliptical, and its length dimension on the rotating seat is greater than its width dimension. The limiting groove includes two semi-elliptical cavities symmetrically joined together in the length direction. The two ends of the limiting retaining ring in the length direction are respectively disposed in the two semi-elliptical cavities, and the two ends of the limiting retaining ring can only be rotatably disposed within their respective semi-elliptical cavities.

10. A sofa structure, characterized in that, Includes the handrail lifting mechanism as described in any one of claims 1 to 9.

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