Suspension mechanism, functional iron stand and movable sofa

Abstract

The utility model provides a suspension mechanism, a functional iron stand and a movable sofa, the suspension mechanism is suitable for the functional iron stand, the suspension mechanism comprises a mounting structure and a movable structure, and the mounting structure is fixed relative to a support foundation; and the movable structure is movably connected with the mounting structure through the sliding rail structure and / or the connecting rod structure. The movable structure is driven to move through the sliding rail structure and / or the connecting rod structure so that the movable structure can be movably arranged, the posture of the functional iron stand at least has the sitting posture state and the lying posture state, and in the process that the posture of the functional iron stand is switched from the sitting posture state to the lying posture state, the sliding rail structure and / or the connecting rod structure drive the movable structure to move. The projection plane of the movable structure on the mounting structure is gradually reduced, so that the movable structure is driven to move only through the sliding rail structure and / or the connecting rod structure, the complexity of the suspension mechanism is reduced, and the problem that in the prior art, the suspension mechanism of the handrail floor type iron stand is too complex in structure is solved.

Description

[0001] The present application claims priority to the patent application with the application number 202422332290.1, filed on September 24, 2024, with the State Intellectual Property Office of China, and the invention name of "hanging mechanism, functional iron stand and movable sofa". TECHNICAL FIELD

[0002] The utility model relates to intelligent furniture technical field, specifically, it relates to a kind of hanging mechanism, functional iron stand and movable sofa. BACKGROUND

[0003] Generally, movable sofa includes functional iron stand (also called mechanical stretching device), and the functional iron stand includes seat frame and main body mechanism for adjusting the front and back positions of seat frame, and seat frame and main body mechanism are also simultaneously connected with backrest, footrest and other mechanisms, and are also partitioned and provided with soft package on corresponding structures, to finally form soft package seat, soft package backrest and soft package footrest and other structures of sofa. Linear driver is also provided on functional iron stand to drive overall functional iron stand to transform between sitting posture, leisure posture (also called TV posture) and lying posture, so as to drive movable sofa to transform between three postures or two postures.

[0004] Functional sofa can be divided into iron stand floor type sofa and armrest floor type iron stand according to different floor structures. Among them, the basic structure of armrest floor type iron stand includes fixed plate fixedly connected with armrest part of movable seat, seat frame movable forward and backward relative to fixed plate, and backrest assembly pivotally connected with rear part of seat frame; backrest assembly includes backrest support for attaching backrest, and basic constituent part thereof includes connecting rod mechanism (also called hanging mechanism); connecting rod mechanism includes main swing rod assembly and auxiliary swing rod assembly, main swing rod assembly and seat frame form planar polygon, auxiliary swing rod and armrest mounting plate form planar polygon, and main swing rod assembly and auxiliary swing rod assembly are linked through a plurality of linkage rods. To make seat frame move forward and backward relative to armrest mounting plate through connecting rod mechanism.

[0005] However, the connecting rods of the hanging mechanism of the armrest floor type iron stand in the prior art are too many, and the stability is insufficient. UTILITY MODEL CONTENTS

[0006] The main purpose of the utility model is to provide a kind of hanging mechanism, functional iron stand and movable sofa, to solve the problem that the structure of the hanging mechanism of the armrest floor type iron stand in the prior art is too complex.

[0007] In order to achieve the above object, according to the first aspect of the utility model, a kind of suspension mechanism is provided, it is applicable to functional iron stand, suspension mechanism includes: mounting structure, it is fixed relative to support base;Movable structure, movable structure is movably connected with mounting structure by slide rail structure and / or connecting rod structure, so that movable structure is movably arranged, so that the pose of functional iron stand at least has sitting posture and lying posture;Wherein, in the process that the pose of functional iron stand is switched from sitting posture to lying posture, slide rail structure and / or connecting rod structure drive movable structure to move, so that the projection area of movable structure on mounting structure gradually decreases.

[0008] Further, the slide rail structure includes: a sliding roller connected to the movable structure, the sliding roller being rotatably arranged about its own axis; a guide track, one end of the guide track being fixed on the mounting structure, the sliding roller being movably arranged in the guide track, so that the sliding roller moves along the extension direction of the guide track to drive the movable structure to move.

[0009] Further, the connection between the guide track and the mounting structure is higher than the lowest point of the mounting structure, so that the movable structure is higher than the mounting structure when the sliding roller moves along the guide track.

[0010] Further, the connecting rod structure includes: a first connecting rod, a first end of the first connecting rod being rotatably connected to the mounting structure; a second connecting rod, the second connecting rod being spaced apart from the first connecting rod, a first end of the second connecting rod being rotatably connected to the mounting structure; a third connecting rod, a first end of the third connecting rod being rotatably connected to a second end of the first connecting rod, a second end of the third connecting rod being rotatably connected to the movable structure, a middle part of the third connecting rod being rotatably connected to a second end of the second connecting rod, so that the third connecting rod drives the movable structure to move.

[0011] Further, the connection between the first end of the second connecting rod and the mounting structure is higher than the lowest point of the mounting structure, the length of the first connecting rod is L1, the length of the second connecting rod is L2, and the length of the third connecting rod is L3, wherein L1>L2>1 / 2L3, so that the movable structure is higher than the mounting structure during the movement of the third connecting rod.

[0012] Further, the connecting rod structure includes: a fourth connecting rod, a first end of the fourth connecting rod being hingedly connected to the mounting structure; a fifth connecting rod, a first end of the fifth connecting rod being hingedly connected to the movable structure, a second end of the fifth connecting rod being hingedly connected to a second end of the fourth connecting rod; a sixth connecting rod, a first end of the sixth connecting rod being hingedly connected to a middle part of the fourth connecting rod, a second end of the sixth connecting rod being hingedly connected to the movable structure, so as to drive the movable structure to move.

[0013] According to the second aspect of the utility model, a kind of functional iron stand is provided, applicable to movable sofa, functional iron stand includes: above-mentioned suspension mechanism;Frame mechanism, and the movable structure of suspension mechanism is rotatably connected with connection component, to be movably arranged by movable structure driving frame mechanism;Pedal mechanism, it is set in the first end of the movable structure of suspension mechanism;Backrest mechanism, it is set in the second end of movable structure;Driving mechanism, the driving body of driving mechanism is connected with pedal mechanism;The driving rod of driving mechanism is connected with the mounting structure of suspension mechanism, to drive movable structure movement, to drive pedal mechanism and backrest mechanism movement, to make the pose of functional iron stand have sitting posture state, leisure posture state and lying posture state.

[0014] Further, the backrest mechanism includes: a backrest piece movably arranged;A first connecting piece, both ends of the first connecting piece are rotatably connected with the frame mechanism and the backrest piece respectively;The first connecting piece is arranged in a bent manner, and the inflection point of the first connecting piece protrudes towards the backrest piece;A second connecting piece, both ends of the second connecting piece are rotatably connected with the backrest piece and the mounting structure respectively;The second connecting piece includes two bent rods rotatably connected, and the inflection point of the bent rod rotatably connected with the backrest piece is rotatably connected with the frame mechanism;Wherein, when the pose of the functional iron stand is in the sitting posture state or the leisure posture state, the backrest piece is in an upright state;When the pose of the functional iron stand is in the lying posture state, the backrest piece is in a lying state.

[0015] Further, the backrest mechanism includes: a backrest piece movably arranged;A first connecting piece, the first end of the first connecting piece is hingedly connected with the backrest piece;A second connecting piece, the first end of the second connecting piece is hingedly connected with the backrest piece;A linkage piece, the first hinging point, the second hinging point, the third hinging point and the fourth hinging point are respectively and separately arranged on the linkage piece, the linkage piece is hingedly connected with the frame mechanism through the first hinging point, the second end of the first connecting piece is hingedly connected with the linkage piece through the second hinging point, the second end of the second connecting piece is hingedly connected with the linkage piece through the third hinging point, and the linkage piece is hingedly connected with the movable structure through the fourth hinging point.

[0016] Further, when the functional iron stand is switched from the sitting posture state to the lying posture state, the hinging point of the backrest piece and the first connecting piece or the hinging point of the backrest piece and the second connecting piece moves a preset distance A in the horizontal direction relative to the support plane of the support base, and the preset distance A is 200mm to 380mm.

[0017] Further, when the functional iron stand is switched from the sitting posture state to the lying posture state, the hinging point of the backrest piece and the first connecting piece or the hinging point of the backrest piece and the second connecting piece moves a preset distance B relative to the frame mechanism, and the preset distance B is 60mm to 100mm.

[0018] Further, the seat frame mechanism is provided with a limiting piece near the connecting assembly, the footrest mechanism comprises: an extending piece connected with the seat frame mechanism, the extending piece being telescopically arranged; and a third connecting piece, both ends of the third connecting piece being rotatably connected with the extending piece and the connecting assembly, wherein, when the posture of the functional iron stand is in the sitting state, the extending piece is in the closed state; when the posture of the functional iron stand is switched from the sitting state to the leisure state, the extending piece performs an extending movement until the connecting assembly abuts against the limiting piece; when the posture of the functional iron stand is switched from the leisure state to the lying state, the extending piece maintains the extending state.

[0019] Further, the distance S between the lowest point of the mounting structure and the supporting base is in the range of 11cm≤S≤17cm; wherein the seat frame mechanism, the footrest mechanism, the backrest mechanism and the driving mechanism are arranged above the mounting structure.

[0020] According to a third aspect of the present application, a movable sofa is provided, comprising the functional iron stand.

[0021] According to the technical scheme of the present application, the present application provides a suspension mechanism, which is suitable for the functional iron stand, and comprises a mounting structure and a movable structure, wherein the mounting structure is fixed relative to the supporting base; and the movable structure is movably connected with the mounting structure through a slide rail structure and / or a connecting rod structure. The movable structure is moved by the slide rail structure and / or the connecting rod structure, so that the movable structure is movably arranged, and the posture of the functional iron stand has at least the sitting state and the lying state. During the switching of the posture of the functional iron stand from the sitting state to the lying state, the movable structure is moved by the slide rail structure and / or the connecting rod structure, so that the projection area of the movable structure on the mounting structure gradually decreases, thereby only moving the movable structure by the slide rail structure and / or the connecting rod structure, so as to reduce the complexity of the suspension mechanism and improve the stability of the suspension mechanism during the movement. Moreover, the suspension mechanism is more compact by reducing the parts, so that the overall thickness of the functional iron stand is reduced, facilitating use, and thereby solving the problem of the overly complex structure of the suspension mechanism of the handrail floor type iron stand in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the specification explain the application. The use of the same reference symbols in different drawings and / or the use of similar reference symbols in the drawings designates similar or identical components.

[0023] Figure 1 Fig. 1 shows a first perspective view of a functional iron stand according to the present application, wherein the posture of the functional iron stand is in a sitting state;

[0024] Figure 2The second visual angle structural schematic view of the functional iron stand is shown in a sitting posture state according to the utility model;

[0025] Figure 3 The third visual angle structural schematic view of the functional iron stand is shown in a sitting posture state according to the utility model;

[0026] Figure 4 The first visual angle structural schematic view of the functional iron stand is shown in a leisure posture state according to the utility model;

[0027] Figure 5 The second visual angle structural schematic view of the functional iron stand is shown in a leisure posture state according to the utility model; wherein the installation structure and the guide rail in the drawing are hidden;

[0028] Figure 6 The third visual angle structural schematic view of the functional iron stand is shown in a leisure posture state according to the utility model;

[0029] Figure 7 The first visual angle structural schematic view of the functional iron stand is shown in a lying posture state according to the utility model;

[0030] Figure 8 The second visual angle structural schematic view of the functional iron stand is shown in a lying posture state according to the utility model;

[0031] Figure 9 The third specific implementation structural schematic view of the hanging mechanism of the functional iron stand is shown according to the utility model;

[0032] Figure 10 The structural schematic view of the backrest mechanism of the functional iron stand is shown in a second embodiment according to the utility model;

[0033] Figure 11 The structural comparison view of the functional iron stand in three postures respectively is shown according to the utility model;

[0034] Figure 12 The structural overlapping schematic view of the backrest mechanism of the functional stand body in a sitting posture and a lying posture respectively is shown according to the utility model.

[0035] Among them, the above-mentioned drawings include the following figure marks:

[0036] 1, mounting structure; 2, movable structure; 3, slide rail structure; 31, sliding roller; 32, guide rail; 4, connecting rod structure; 41, first connecting rod; 42, second connecting rod; 43, third connecting rod; 43, fourth connecting rod; 45, fifth connecting rod; 46, sixth connecting rod; 5, seat frame mechanism; 51, limiting piece; 6, connecting assembly; 61, first swing rod; 62, second swing rod; 7, foot pedal mechanism; 71, third connecting piece; 72, stretching piece; 8, backrest mechanism; 81, backrest piece; 82, first connecting piece; 83, second connecting piece; 84, linkage piece; 840, first hinge point; 841, second hinge point; 842, third hinge point; 843, fourth hinge point; 85, third connecting piece; 9, driving mechanism; 91, driving body; 92, driving rod; 93, first transmission rod; 94, second transmission rod. DETAILED DESCRIPTION

[0037] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0038] Please refer to Figures 1 to 8 The utility model provides a kind of suspension mechanism, it is applicable to functional iron stand, suspension mechanism includes mounting structure 1, movable structure 2, mounting structure 1 is fixed relative to support base;Movable structure 2 is movably connected with mounting structure 1 by slide rail structure 3 and / or connecting rod structure 4, so that movable structure 2 is movably arranged, so that the pose of functional iron stand at least has sitting posture and lying posture;Wherein, in the process that the pose of functional iron stand is switched from sitting posture to lying posture, slide rail structure 3 and / or connecting rod structure 4 drive movable structure 2 to move, so that the projection area of movable structure 2 on mounting structure 1 gradually decreases.

[0039] The utility model provides a kind of suspension mechanism, suspension mechanism is applicable to functional iron stand, suspension mechanism includes mounting structure 1 and movable structure 2. Through slide rail structure 3 and / or connecting rod structure 4 drive movable structure 2 to move to make movable structure 2 movably arranged, so that the pose of functional iron stand at least has sitting posture and lying posture, in the process that the pose of functional iron stand is switched from sitting posture to lying posture, slide rail structure 3 and / or connecting rod structure 4 drive movable structure 2 to move, so that the projection area of movable structure 2 on mounting structure 1 gradually decreases, to reduce the complexity of suspension mechanism only by slide rail structure 3 and / or connecting rod structure 4 drive movable structure to move, improve the stability of suspension mechanism in the process of motion;And, by reducing the components of suspension mechanism makes its structure more compact, so that the overall thickness of functional iron stand is thinned, facilitate use, to solve the problem that the structure of suspension mechanism of handrail floor type iron stand in prior art is too complex.

[0040] Optionally, the support base in the embodiment of the present application is an armrest of the movable sofa, and the armrest is placed on the ground.

[0041] Specifically, when the posture of the functional iron stand is in the sitting state, the movable structure 2 is located at the position with the maximum coincidence degree with the mounting structure 1; when the posture of the functional iron stand is in the lying state, the slide rail structure 3 and / or the connecting rod structure 4 drive the movable structure 2 to move, so that the movable structure 2 is extended relative to the mounting structure 1.

[0042] Further, during the process that the posture of the functional iron stand is switched from the sitting state to the lying state, the posture of the functional iron stand also has a leisure state, and when the posture of the functional iron stand is in the leisure state, the relative position between the movable structure 2 and the mounting structure 1 is the same as that when the posture of the functional iron stand is in the sitting state, that is, the slide rail structure 3 and / or the connecting rod structure 4 drive the movable structure 2 to move to the position with the maximum coincidence degree with the mounting structure 1.

[0043] Preferably, the relative position between the movable structure 2 and the mounting structure 1 is unchanged when the posture of the functional iron stand is in the sitting state or the leisure state.

[0044] Specifically, in order to drive the movable structure 2 to move, the slide rail structure 3 includes a sliding roller 31 and a guide rail 32, the sliding roller 31 is connected with the movable structure 2, and the sliding roller 31 is rotatably arranged around its own axis; one end of the guide rail 32 is fixed on the mounting structure 1, and the sliding roller 31 is movably arranged in the guide rail 32, so that the sliding roller 31 moves along the extension direction of the guide rail 32 to drive the movable structure 2 to move.

[0045] Optionally, one end of the guide rail 32 is fixedly connected with the mounting structure 1 through a bolt and a nut.

[0046] Preferably, the slide rail structure 3 is a roller type slide rail, which is simple in structure.

[0047] Further, in order to not change the distance between the bottom of the suspension mechanism and the support base during the change of the posture of the functional iron stand, the connection position of the guide rail 32 with the mounting structure 1 is higher than the lowest point of the mounting structure 1, so that the movable structure 2 is higher than the mounting structure 1 when the sliding roller 31 moves along the guide rail 32. Such a setting makes the lowest point of the movable structure 2 always higher than the lowest point of the mounting structure 1 during the movement of the movable structure 2, and since the mounting structure 1 is fixedly arranged relative to the support base, the minimum distance between the lowest point of the suspension mechanism and the support base is always the distance between the lowest point of the mounting structure 1 and the support base, so that the vertical space of the bottom of the movable sofa is larger when the movable sofa uses the functional iron stand in the embodiment of the present application, which is more conducive to cleaning the bottom of the movable sofa, and the height of the vertical space is not affected during the movement of the movable structure 2.

[0048] Specifically, in order to drive the movable structure 2 to move, the linkage structure 4 comprises a first linkage 41, a second linkage 42 and a third linkage 43, the first end of the first linkage 41 is rotatably connected with the mounting structure 1, the first end of the second linkage 42 is rotatably connected with the mounting structure 1 and is spaced apart from the first linkage 41, the first end of the third linkage 43 is rotatably connected with the second end of the first linkage 41, the second end of the third linkage 43 is rotatably connected with the movable structure 2, and the middle part of the third linkage 43 is rotatably connected with the second end of the second linkage 42, so that the third linkage 43 drives the movable structure 2 to move.

[0049] Optionally, the third linkage 43 drives the movable structure 2 to move along a straight line.

[0050] Optionally, the first end of the first linkage 41 is hingedly connected with the mounting structure 1 through a rotating shaft, the first end of the second linkage 42 is hingedly connected with the mounting structure 1 through a rotating shaft, the first end of the third linkage 43 is hingedly connected with the second end of the first linkage 41 through a rotating shaft, the second end of the third linkage 43 is hingedly connected with the movable structure 2 through a rotating shaft, and the middle part of the third linkage 43 is hingedly connected with the second end of the second linkage 42 through a rotating shaft.

[0051] Further, in order to not change the distance between the bottom of the suspension mechanism and the supporting surface during the change of the pose of the functional iron stand, the connection between the first end of the second linkage 42 and the mounting structure 1 is higher than the lowest point of the mounting structure 1, the length of the first linkage 41 is L1, the length of the second linkage 42 is L2, and the length of the third linkage 43 is L3, wherein L1>L2>1 / 2L3, so that the movable structure 2 is higher than the mounting structure 1 during the movement of the third linkage 43. Such a setting makes the lowest point of the movable structure 2 always higher than the lowest point of the mounting structure 1 during the movement of the movable structure 2, and since the mounting structure 1 is fixedly arranged relative to the supporting surface, the minimum distance between the lowest point of the suspension mechanism and the supporting surface is always the distance between the lowest point of the mounting structure 1 and the supporting surface, so that the vertical space of the bottom of the movable sofa is larger when the movable sofa uses the functional iron stand in the embodiment, which is more conducive to cleaning the bottom of the movable sofa, and the height of the vertical space is not affected during the movement of the movable structure 2.

[0052] As Figure 9As shown, in another embodiment of the linkage structure 4, the linkage structure 4 comprises a fourth linkage 44, a fifth linkage 45 and a sixth linkage 46; the first end of the fourth linkage 44 is hingedly connected with the mounting structure 1; the first end of the fifth linkage 45 is hingedly connected with the movable structure 2, and the second end of the fifth linkage 45 is hingedly connected with the second end of the fourth linkage 44; the first end of the sixth linkage 46 is hingedly connected with the middle part of the fourth linkage 44, and the second end of the sixth linkage 46 is hingedly connected with the movable structure 2 to drive the movable structure 2 to move. In this way, when the slide rail structure 3 and the linkage structure 4 are both in the storage position, i.e., the seat frame mechanism 5 is in the sitting position, the angle between the fourth linkage 44 and the mounting structure 1 is an acute angle, so that the thickness of the slide rail structure 3 in the storage position is smaller; when the slide rail structure 3 is in the extended position (switched from the TV position to the lying position), it rotates forward and stands up, thereby not only driving the seat frame mechanism 5 to move forward, but also increasing the distance between the seat frame mechanism 5 and the mounting structure 1, which is beneficial to the front end of the seat frame mechanism 5 in the extended state to be raised, so that the user is more comfortable in the lying position.

[0053] In the above embodiment, the third linkage 43 comprises at least four bent rod segments connected in sequence, and the length and angle of each bent rod segment can be adjusted to ensure that the movable structure 2 avoids the backrest mechanism 8 during the change of position (such as from the sitting position to the lying position), thereby avoiding the collision between the movable structure 2 and the backrest mechanism 8. At the same time, the limiting member 51 can be selectively arranged on the at least four bent rod segments of the third linkage 43, which can more effectively limit the movement range of the second linkage 42, prevent overstretching or contraction, protect the entire mechanism from damage, and thereby avoid the safety risk to the user caused by over-limit movement. The limiting member 51 is usually used to stop the further movement of the linkage structure 4 when a certain position is reached, ensuring that the movable structure 2 can safely and stably stay in the correct position in any position state.

[0054] Optionally, the specific implementation structure of the suspension mechanism in the embodiment of the present application is as follows:

[0055] The first specific implementation structure is that the two ends of the mounting structure 1 are respectively connected with the two ends of the movable structure 2 through the slide rail structure 3 and the linkage structure 4.

[0056] The second specific implementation structure is that the two ends of the mounting structure 1 are respectively connected with the two ends of the movable structure 2 through two slide rail structures 3.

[0057] The third specific implementation structure is that the two ends of the mounting structure 1 are movably connected with the two ends of the movable structure 2 through two connecting rod structures 4. The first connecting rod structure 4 includes a first connecting rod 41, a second connecting rod 42 and a third connecting rod 43; and the second connecting rod structure 4 includes a fourth connecting rod 44, a fifth connecting rod 45 and a sixth connecting rod 46. The two connecting rod structures 4 of the specific implementation structure can be further divided into three matching modes, the first being the matching mode of two first connecting rod structures 4, the second being the matching mode of the first connecting rod structure 4 and the second connecting rod structure 4, and the third being the matching mode of two second connecting rod structures 4.

[0058] Preferably, one end of the mounting structure 1 close to the pedal mechanism 7 is movably connected with the movable structure 2 through the slide rail structure 3, and the other end of the mounting structure 1 close to the backrest mechanism 8 is movably connected with the movable structure 2 through the connecting rod structure 4. Such arrangement makes the structure of the suspension mechanism more compact, which is applicable to the case where the overall thickness of the seat frame mechanism 5 is small, and is conducive to the arrangement of the high legs. In addition, the connecting rod structure 4 is arranged at the end of the mounting structure 1 close to the backrest mechanism 8, so that the connecting rod structure 4 can coincide with the various connecting rod components of the backrest mechanism 8 during movement, so as to hide the connecting rod structure 4 in the projection plane of the backrest mechanism 8, thereby reducing the compression and interference on the soft bag structure installed on the seat frame mechanism 5.

[0059] Preferably, the distance between the lowest point of the functional iron stand and the supporting base is greater than 12 cm, which is called high legs.

[0060] Specifically, when the functional iron stand is in a sitting position or a leisure position, the sliding roller 31 of the slide rail structure 3 is located close to the mounting structure 1 along the guide rail 32 of the slide rail structure 3, and the second end of the third connecting rod 43 of the connecting rod structure 4 is located on the side of the second connecting rod 42 of the connecting rod structure 4 close to the first connecting rod 41 of the connecting rod structure 4.

[0061] Further, when the position of the functional iron stand is changed to a lying position, the sliding roller 31 of the slide rail structure 3 moves away from the mounting structure 1 along the guide rail 32 of the slide rail structure 3, and the second end of the third connecting rod 43 of the connecting rod structure 4 moves to the side of the second connecting rod 42 of the connecting rod structure 4 away from the first connecting rod 41 of the connecting rod structure 4.

[0062] The second aspect of the utility model provides a functional iron stand, the functional iron stand is suitable for movable sofa, in the first embodiment of the functional iron stand of the application, the functional iron stand includes one of above-mentioned suspension mechanism, seat frame mechanism 5, foot rest mechanism 7, backrest mechanism 8 and drive mechanism 9, seat frame mechanism 5 is rotatively connected with the movable structure 2 of suspension mechanism through connecting assembly 6, to drive seat frame mechanism 5 movably with movable structure 2, foot rest mechanism 7 is arranged in the first end of movable structure 2 of suspension mechanism, backrest mechanism 8 is arranged in the second end of movable structure 2, the drive body 91 of drive mechanism 9 is connected with foot rest mechanism 7, the drive rod 92 of drive mechanism 9 is connected with the mounting structure 1 of suspension mechanism, to drive movable structure 2 to move, to drive foot rest mechanism 7 and backrest mechanism 8 to move, to make the pose of functional iron stand have sitting posture state, leisure posture state and lying posture state.

[0063] Wherein, when the pose of functional iron stand is switched from sitting posture state to leisure posture state, drive mechanism 9 drives foot rest mechanism 7 to unfold, until abutting against limiting piece 51 and being limited to stop stretching, at this time, the pose of functional iron stand is leisure posture state, when the pose of functional iron stand is switched from leisure posture state to lying posture state, foot rest mechanism 7 is no longer stretched due to the limiting action, at this time, drive mechanism 9 continues to stretch and drives seat frame mechanism 5 to move forward and upward relative to mounting structure 1, thereby driving backrest mechanism 8 to lie down, to make the pose of functional iron stand be lying posture state.

[0064] Specifically, in order to drive backrest mechanism 8 to move, backrest mechanism 8 includes backrest piece 81, first connecting piece 82 and second connecting piece 83, wherein, backrest piece 81 is movably arranged, two ends of first connecting piece 82 are rotatively connected with seat frame mechanism 5 and backrest piece 81 respectively, first connecting piece 82 is bent, and the inflection point of first connecting piece 82 protrudes towards backrest piece 81, two ends of second connecting piece 83 are rotatively connected with backrest piece 81 and mounting structure 1 respectively, second connecting piece 83 includes two bent rods rotatively connected, the inflection point of the bent rod rotatively connected with backrest piece 81 is rotatively connected with seat frame mechanism 5, wherein, when the pose of functional iron stand is sitting posture state or leisure posture state, backrest piece 81 is in upright state, when the pose of functional iron stand is lying posture state, backrest piece 81 is in lying down state.

[0065] Optionally, first connecting piece 82 is L-shaped rod, second connecting piece 83 includes two L-shaped rods rotatively connected.

[0066] The first connecting piece 82 is provided as an L-shaped rod, and the inflection point of the L-shaped rod protrudes towards the backrest piece 81, so that when the posture of the functional iron stand is in the lying posture state, the included angle between the axis where the one end of the first connecting piece 82 is connected with the seat frame mechanism 5 and the axis where the seat frame mechanism 5 is located is increased, thereby avoiding the influence of the small included angle on the movement of the backrest mechanism 8 when the lying posture state is reset to the sitting posture state, so that the posture switching of the functional iron stand is more smooth. At the same time, when the posture of the functional iron stand is in the lying posture state, the one end of the first connecting piece 82 connected with the backrest piece 81 protrudes towards the direction close to the footrest mechanism 7, which is beneficial to reduce the gap between the soft pad arranged on the backrest mechanism 8 and the soft pad arranged on the seat frame mechanism 5, thereby reducing the risk of pinching.

[0067] Specifically, the seat frame mechanism 5 is provided with a limiting piece 51 close to the connecting assembly 6; in order to drive the footrest mechanism 7 to move, the footrest mechanism 7 comprises an extending piece 72 and a third connecting piece 71, the extending piece 72 is connected with the seat frame mechanism 5 and is telescopically arranged; the two ends of the third connecting piece 71 are respectively rotationally connected with the extending piece 72 and the connecting assembly 6; wherein, when the posture of the functional iron stand is in the sitting posture state, the extending piece 72 is in the closed state; when the posture of the functional iron stand is switched from the sitting posture state to the leisure posture state, the extending piece 72 performs the extending movement until the connecting assembly 6 abuts against the limiting piece 51; when the posture of the functional iron stand is switched from the leisure posture state to the lying posture state, the extending piece 72 maintains the extending state.

[0068] Further, the connecting assembly 6 comprises a first swing rod 61 and a second swing rod 62, the two ends of the first swing rod 61 are respectively rotationally connected with the first end of the movable structure 2 and the first end of the seat frame mechanism 5; the two ends of the second swing rod 62 are respectively rotationally connected with the second end of the movable structure 2 and the second end of the seat frame mechanism 5, so that the movable structure 2 drives the seat frame mechanism 5 to move through the first swing rod 61 and the second swing rod 62. Optionally, the limiting piece 51 is a limiting block; the limiting piece 51 is arranged on the seat frame mechanism on the side close to the second swing rod 62 of the first swing rod 61, so as to limit the extending piece 72 to continue the extending movement when the first swing rod 61 abuts against the limiting piece 51 during the movement of the first swing rod 61.

[0069] Optionally, during the process of switching the posture of the functional iron stand from the sitting posture to the leisure posture, the limiting member 51 is not in contact with the stretching member 72 or the third connecting member 71 or the first swing rod 61, so that the stretching member 72 continuously performs the stretching movement until the limiting member 51 abuts against the stretching member 72 or the third connecting member 71 or the first swing rod 61, and at this time, the stretching member 72 is stretched to the maximum unfolded position, and the posture of the functional iron stand is the leisure posture; during the process of switching the posture of the functional iron stand from the leisure posture to the lying posture, the limiting member 51 abuts against the stretching member 72 or the third connecting member 71 or the first swing rod 61, so that the stretching member 72 stops stretching, thereby enabling the movable structure 2 to move relative to the mounting structure 1.

[0070] In addition, the functional iron stand further comprises a first transmission rod 93 and a second transmission rod 94, the first transmission rod 93 is connected with the foot pedal mechanism 7, and the driving body 91 is mounted on the first transmission rod 93; the second transmission rod 94 is connected with the mounting structure 1, and the driving rod 92 is connected with the second transmission rod 94.

[0071] Optionally, the driving mechanism 9 is a linear driver; the driving body 91 is connected to one of the first transmission rod 93 and the second transmission rod 94 which is located at a higher position, thereby reducing the influence of the driving body 91 on the bottom of the mounting structure 1.

[0072] In the second embodiment of the functional iron stand of the present application, the main difference from the first embodiment is that the specific structure of the backrest mechanism 8 is different. As shown in Figure 10 The backrest mechanism 8 comprises a backrest member 81, a first connecting member 82, a second connecting member 83 and a linkage member 84; the backrest member 81 is movably arranged; the first end of the first connecting member 82 is hingedly connected with the backrest member 81; the first end of the second connecting member 83 is hingedly connected with the backrest member 81; the linkage member 84 is provided with a first hinge point 840, a second hinge point 841, a third hinge point 842 and a fourth hinge point 843 at intervals thereon, the linkage member 84 is hingedly connected with the seat frame mechanism 5 through the first hinge point 840, the second end of the first connecting member 82 is hingedly connected with the linkage member 84 through the second hinge point 841, the second end of the second connecting member 83 is hingedly connected with the linkage member 84 through the third hinge point 842, and the linkage member 84 is hingedly connected with the movable structure 2 through the fourth hinge point 843. The middle part of the first connecting member 82 is hingedly connected with the seat frame mechanism 5 through the third connecting member 85.

[0073] The above arrangement, through the linkage 84 at the fourth hinge point 843 is driven by the driving force, so that the linkage 84 rotates around the first hinge point 840 to drive the first connecting piece 82 to move forward, and in turn drives the front end of the backrest piece 81 to move forward. The linkage 84 rotates around the first hinge point 840 at the same time will drive the second connecting piece 83 to move downward, thereby pulling the rear end of the backrest piece 81 to move downward, to realize the reclining of the backrest piece 81. In this way, the complex hinge structure relying on multiple hinge points improves the stability of the overall mechanism, and each hinge point bears a specific force transmission and motion control function. Through precise design and adjustment, the stability and reliability of the backrest mechanism 8 in various pose states are ensured.

[0074] Specifically, as shown in Figure 11 , when the functional iron frame is switched from the sitting position state to the lying position state, the hinge point of the backrest piece 81 and the first connecting piece 82 or the hinge point of the backrest piece 81 and the second connecting piece 83 moves a preset distance A in the horizontal direction relative to the support plane of the support base. The preset distance A is 200mm to 380mm. In this embodiment, the support base is the ground. In this way, after the functional iron frame is switched to the lying position state, the backrest mechanism 8 moves forward by a preset distance A relative to the ground, and in turn can compensate for the distance of the backrest piece 81 falling backward, so that the backrest piece 81 does not interfere with the wall surface in the lying position state, ensuring the stability of the overall structure of the functional iron frame and realizing the zero wall-relying function of the functional iron frame. At the same time, during the switching from the sitting position state to the lying position state, the horizontal movement distance of the backrest piece 81 is limited within a certain range, which helps to reduce the space required when the sofa changes posture, making the entire product more compact and suitable for use in limited space environments. And through the linkage 84, the movement of the backrest piece 81 is closely linked with the movement of the seat frame mechanism 5 and the movable structure 2, forming a coordinated motion system. This linkage effect ensures that each part of the sofa can move synchronously and harmoniously when changing the pose, avoiding the discord or conflict within the mechanism.

[0075] It should be noted that in this embodiment, when the backrest mechanism 8 is in the sitting position state, the angle between the longitudinal center line of the backrest piece 81 (as shown in Figure 11 , the line connecting the centers of the two holes in the extension direction of the backrest piece 81) relative to the ground is about 71°; when the backrest mechanism 8 is in the lying position state, the angle between the longitudinal center line of the backrest piece 81 (as shown in Figure 11As shown, the angle between the line connecting the centers of the two holes along the extension direction of the backrest 81 and the ground is approximately 33°. The preset distance A, ranging from 200mm to 380mm, is calculated and estimated by increasing the length of the inclined side of the backrest 81 after the backrest 81 tilts back from approximately 71° in a sitting position to approximately 33° in a lying position. Furthermore, considering the need for proper support for the natural curve of the spine when lying down, the ideal distance the backrest 81 needs to move when changing positions is determined by studying the changes in the spinal curve of different groups of people in a lying position. Therefore, the preset distance A that the backrest 81 needs to move horizontally relative to the ground is determined by the hinge point between the backrest 81 and the first connecting member 82 or the second connecting member 83.

[0076] Specifically, such as Figure 11 and Figure 12 As shown, when the functional frame switches from a sitting to a reclining position, the hinge point between the backrest 81 and the first connecting member 82 or the second connecting member 83 moves a preset distance B relative to the seat frame mechanism 5. The preset distance B is 60mm to 100mm. The preset distance A is positively correlated with the preset distance B. When the functional frame switches from a sitting to a reclining position, the seat frame mechanism 5 moves a preset distance C horizontally relative to the supporting plane of the supporting base. The preset distance C is positively correlated with the preset distance A. Thus, the backrest 81 is hinged to the seat frame mechanism 5 via multiple connecting rods. After the functional frame switches to the reclining position, the angle between the first connecting member 82 or the second connecting member 83 and the connecting rods connected to them approaches 180°. This allows the hinge point between the backrest 81 and the first connecting member 82 or the second connecting member 83 to move forward to the maximum extent, further driving the backrest 81 forward to achieve a zero-wall-leaning effect. Furthermore, with zero wall contact, the backrest component 81 moves forward a greater distance (preset distance B). This reduces the required forward distance (preset distance C) for the seat frame mechanism 5, resulting in a more stable center of gravity for the functional frame and reducing the likelihood of instability caused by excessive forward movement of the seat frame mechanism 5. Simultaneously, the preset distance C of the seat frame mechanism 5 provides sufficient space for the backrest component 81 to move horizontally and recline, allowing it to move precisely to the desired position in a reclining posture within a larger space, even with zero wall contact.

[0077] The upper limit of the preset distance B, 100mm, is the limit of the extension of the seat frame mechanism 5 in the lying position, while the lower limit of the preset distance B, 60mm, is the extension distance of the seat frame mechanism 5 to accommodate the minimum comfort of the spine when the human body is lying down.

[0078] In the embodiment, when the functional iron frame is in the sitting state, the overall thickness between the mounting structure 1 and the top of the seat frame mechanism 5 in the vertical direction is 150-160 mm. In this way, the overall structure is thinned while the height of the seat frame mechanism 5 remains unchanged, which is conducive to increasing the vertical space below the mounting structure 1, saving space, and maintaining the use function of the sofa without being affected. Moreover, the thinner overall thickness is also conducive to the transportation and installation process of the sofa. During transportation, the thinner sofa can pass through narrow passages such as stairs and door frames more easily, reducing the difficulty of carrying and the risk of damage. During installation, the compact size simplifies the installation steps and reduces the requirements for installation space.

[0079] In the embodiment, when the functional iron frame is in the sitting state, the thickness of the footrest mechanism 7 is 120-130 mm. In this way, the footrest mechanism 7 occupies less space when stored, and the thickness change when unfolded helps to provide sufficient leg support space to ensure that the footrest mechanism 7 can provide sufficient support and comfort for the user even in the sitting state. And this thickness range can improve space utilization efficiency without affecting comfort.

[0080] In the embodiment, when the functional iron frame is switched from the sitting state to the lying state, the angle of the backrest piece 81 changes in the range of 33°-43°. In this way, it is ensured that the backrest piece 81 can provide a suitable support angle for the user when changing to the lying state, so that the user's back can be comfortably rested. The inclination angle of 33°-43° helps to optimize space utilization when changing the posture, so that when lying down, both the comfort of the lying state and the stability of the structure of the functional iron frame can be ensured, so that the sofa can adapt to a compact layout in different postures, and it helps to avoid motion interference between the backrest mechanism 8 and other parts of the sofa when changing the posture, improving the user experience.

[0081] In the embodiment, when the functional iron frame is switched from the sitting state to the lying state, the angle of the seat frame mechanism 5 is raised (e.g. Figure 11As shown, the angle of the line between the two connection points of the seat frame mechanism 5 along its extension direction changes in the range of 4.5° to 6.5°. In this way, it can be ensured that when the user changes to the lying position, the seat frame mechanism 5 can be slightly lifted, which is coordinated with the movement of the backrest mechanism 8 and the footrest mechanism 7, thereby providing an ergonomic lying angle. This angle range can well support the user's spine, reduce the pressure on the body when changing the posture, and provide a more comfortable lying experience. At the same time, the limitation of the lifting angle of the seat frame mechanism 5 aims to balance the space efficiency and the lying comfort. Too large lifting angle may occupy more space, while too small may affect the lying comfort. This angle range avoids occupying too much additional space and ensures that the user's legs and back are properly supported when lying down, so that the sofa can still maintain space friendliness when changing the posture.

[0082] Optionally, in the present application, two backrest mechanisms 8 can be selected according to different use requirements and actual working conditions, and combined with multiple suspension mechanisms in three kinds to form functional iron stands of different implementation structures.

[0083] The movement of the functional iron stand in the embodiment of the present application in the specific implementation is as follows: the driving rod 92 of the driving mechanism 9 is located in the driving body 91, the footrest mechanism 7 is folded below the seat frame mechanism 5, and the functional iron stand is in a sitting position; the driving mechanism 9 is started, the driving rod 92 is extended, the stretching piece 72 is stretched, the seat frame mechanism 5 is moved, the first swing rod 61 is moved, the first swing rod 61 abuts against the limiting piece 51, and the stretching piece 72 stops stretching, so that the functional iron stand is in a leisure position; the driving rod 92 continues to extend, the seat frame mechanism 5 continues to move, the first swing rod 61 is moved by pulling the third connecting piece 71, the first swing rod 61 moves the movable structure 2, the movable structure 2 moves the second connecting rod 42 and the sliding roller 31, and at the same time, the backrest piece 81 is moved from the upright state to the lying state through the first connecting piece 82 and the second connecting piece 83, until the functional iron stand is in a lying position.

[0084] Specifically, in order to keep the distance between the lowest point of the functional iron stand and the supporting base unchanged when the position of the functional iron stand is switched, the distance S between the lowest point of the mounting structure 1 and the supporting base is in the range of 11 cm≤S≤17 cm; wherein the seat frame mechanism 5, the footrest mechanism 7, the backrest mechanism 8 and the driving mechanism 9 are arranged above the mounting structure 1, so that when the position of the functional iron stand is switched between the sitting position, the leisure position and the lying position, the distance between the lowest point of the functional iron stand and the supporting base is always not less than the distance S, thereby the vertical space of the bottom of the movable sofa is larger when the movable sofa uses the functional iron stand in the embodiment of the present application, which is more conducive to cleaning the bottom of the movable sofa, and the height of the vertical space is not affected during the switching of the position of the functional iron stand.

[0085] Preferably, the distance S is in the range 12cm < S < 14cm.

[0086] The third aspect of the utility model further provides a movable sofa, the movable sofa includes the functional iron stand.

[0087] Generally, when the driving rod 92 of the driving mechanism 9 is retracted into the driving body 91, the functional iron stand is in a sitting posture state, at this time, the slide rail structure 3 and / or the connecting rod structure 4 drive the movable structure 2 to move to the position with the maximum coincidence degree with the mounting structure 1, the stretching piece 72 is in a closed state, and the backrest piece 81 is in an upright state; the driving mechanism 9 is started, when the driving rod 92 is extended relative to the driving body 91, the driving stretching piece 72 is driven to stretch, the functional iron stand is in a leisure posture state, at this time, the slide rail structure 3 and / or the connecting rod structure 4 remain in the original position, the stretching piece 72 is in a stretched state, and the backrest piece 81 is still in an upright state; when the driving rod 92 is continuously extended relative to the driving body 91, the first swing rod 61 abuts against the limiting piece 51 so that the stretching piece 72 no longer continues to stretch, and the functional iron stand is in a lying posture state, at this time, the slide rail structure 3 and / or the connecting rod structure 4 drive the movable structure 2 to move so that the movable structure 2 is extended relative to the mounting structure 1, the stretching piece 72 remains in a stretched state, and the backrest piece 81 is in a lying state.

[0088] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:

[0089] The utility model provides a kind of suspension mechanism, suspension mechanism is applicable to functional iron stand, suspension mechanism includes mounting structure 1 and movable structure 2, wherein, mounting structure 1 is fixed relative to support base;Movable structure 2 is movably connected with mounting structure 1 by slide rail structure 3 and / or connecting rod structure 4.It is driven by slide rail structure 3 and / or connecting rod structure 4 to move movable structure 2 to make movable structure 2 movably arranged, to make the posture of functional iron stand at least have sitting posture state and lying posture state, in the process that the posture of functional iron stand is switched from sitting posture state to lying posture state, slide rail structure 3 and / or connecting rod structure 4 drive movable structure 2 to move, to make the projection area of movable structure 2 on mounting structure 1 gradually reduce, to reduce the complexity of suspension mechanism only by slide rail structure 3 and / or connecting rod structure 4 drive movable structure to move, improve the stability of suspension mechanism in the process of motion;And, by reducing the components of suspension mechanism makes its structure more compact, to make the overall thickness of functional iron stand thin, facilitate use, to further solve the problem that the structure of suspension mechanism of handrail floor type iron stand in prior art is too complex.

[0090] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A suspension mechanism adapted for use with a functional iron stand, characterized in that, The suspension mechanism comprises: a mounting structure (1) fixed relative to a support base; a movable structure (2) movably connected to the mounting structure (1) through a slide rail structure (3) and / or a linkage structure (4), so that the movable structure (2) is movably arranged to have at least a sitting state and a lying state; wherein, during the switching of the functional iron stand from the sitting state to the lying state, the slide rail structure (3) and / or the linkage structure (4) drives the movable structure (2) to move, so that the projection area of the movable structure (2) on the mounting structure (1) gradually decreases.

2. The suspension mechanism of claim 1, wherein The slide rail structure (3) comprises: a sliding roller (31) connected to the movable structure (2), which is rotatably arranged around its own axis; a guide rail (32) with one end fixed on the mounting structure (1), and the sliding roller (31) movably arranged in the guide rail (32) to move along the extension direction of the guide rail (32) to drive the movable structure (2) to move.

3. The suspension mechanism of claim 2, wherein, The connection between the guide rail (32) and the mounting structure (1) is higher than the lowest point of the mounting structure (1), so that the movable structure (2) is higher than the mounting structure (1) when the sliding roller (31) moves along the guide rail (32).

4. The suspension mechanism of claim 1, wherein The linkage structure (4) comprises: a first linkage (41) with a first end rotatably connected to the mounting structure (1); a second linkage (42) spaced apart from the first linkage (41), with a first end rotatably connected to the mounting structure (1); a third linkage (43) with a first end rotatably connected to a second end of the first linkage (41), a second end rotatably connected to the movable structure (2), and a middle part rotatably connected to a second end of the second linkage (42), so that the third linkage (43) drives the movable structure (2) to move.

5. The suspension mechanism of claim 4, wherein, The first end of the second linkage (42) is connected to the mounting structure (1) higher than the lowest point of the mounting structure (1), the length of the first linkage (41) is L1, the length of the second linkage (42) is L2, and the length of the third linkage (43) is L3, wherein L1>L2>1 / 2L3, so that the movable structure (2) is higher than the mounting structure (1) during the movement of the third linkage (43).

6. The suspension mechanism of claim 1, wherein The linkage structure (4) comprises: a fourth linkage (44) with a first end hinged to the mounting structure (1); a fifth linkage (45) with a first end hinged to the movable structure (2) and a second end hinged to a second end of the fourth linkage (44); A sixth connecting rod (46) is hingedly connected to the middle part of the fourth connecting rod (44) at a first end, and hingedly connected to the movable structure (2) at a second end to drive the movable structure (2) to move.

7. A functional iron stand, suitable for a movable sofa, characterized in that, The functional iron stand comprises: The hanging mechanism according to any one of claims 1-6; A seat frame mechanism (5) is rotatably connected to the movable structure (2) of the hanging mechanism through a connecting assembly (6) to be movably arranged by the movable structure (2); A footrest mechanism (7) is arranged at a first end of the movable structure (2) of the hanging mechanism; A backrest mechanism (8) is arranged at a second end of the movable structure (2); A driving mechanism (9) is connected to the footrest mechanism (7) at a driving body (91), and connected to the mounting structure (1) of the hanging mechanism at a driving rod (92) to drive the movable structure (2) to move, thereby driving the footrest mechanism (7) and the backrest mechanism (8) to move, so that the functional iron stand has a sitting state, a leisure state and a lying state.

8. The utility shelf of claim 7, wherein, The backrest mechanism (8) comprises: A backrest piece (81) is movably arranged; A first connecting piece (82) is rotatably connected to the seat frame mechanism (5) and the backrest piece (81) at two ends, respectively; the first connecting piece (82) is arranged in a bent manner, and an inflection point of the first connecting piece (82) protrudes towards the backrest piece (81); A second connecting piece (83) is rotatably connected to the backrest piece (81) and the mounting structure (1) at two ends, respectively; the second connecting piece (83) comprises two bent rods rotatably connected, and an inflection point of the bent rod rotatably connected to the backrest piece (81) is rotatably connected to the seat frame mechanism (5); When the functional iron stand is in the sitting state or the leisure state, the backrest piece (81) is in an upright state; when the functional iron stand is in the lying state, the backrest piece (81) is in a lying state.

9. The utility shelf of claim 7, wherein, The backrest mechanism (8) comprises: A backrest piece (81) is movably arranged; A first connecting piece (82) is hingedly connected to the backrest piece (81) at a first end; A second connecting piece (83) is hingedly connected to the backrest piece (81) at a first end; A linkage (84) is provided with a first hinge point (840), a second hinge point (841), a third hinge point (842) and a fourth hinge point (843) respectively at intervals, the linkage (84) is hingedly connected to the seat frame mechanism (5) through the first hinge point (840), the second end of the first connecting piece (82) is hingedly connected to the linkage (84) through the second hinge point (841), the second end of the second connecting piece (83) is hingedly connected to the linkage (84) through the third hinge point (842), and the linkage (84) is hingedly connected to the movable structure (2) through the fourth hinge point (843).

10. The utility shelf of claim 9, wherein, When the functional iron stand is switched from the sitting posture state to the lying posture state, the hinge point of the backrest piece (81) and the first connecting piece (82) or the hinge point of the second connecting piece (83) moves a preset distance A in the horizontal direction relative to the support plane of the support base, and the preset distance A is 200mm to 380mm.

11. The utility shelf of claim 9, wherein, When the functional iron stand is switched from the sitting posture state to the lying posture state, the hinge point of the backrest piece (81) and the first connecting piece (82) or the hinge point of the second connecting piece (83) moves a preset distance B relative to the seat frame mechanism (5), and the preset distance B is 60mm to 100mm.

12. The utility shelf of claim 7, wherein, The seat frame mechanism (5) is provided with a limiting piece (51) near the connecting assembly (6), and the foot pedal mechanism (7) comprises: an extension piece (72) connected to the seat frame mechanism (5), the extension piece (72) being telescopically arranged; a third connecting piece (71) having two ends respectively rotatably connected to the extension piece (72) and the connecting assembly (6); wherein, when the posture of the functional iron stand is in the sitting posture state, the extension piece (72) is in a closed state; when the posture of the functional iron stand is switched from the sitting posture state to the leisure posture state, the extension piece (72) performs an extension movement until the connecting assembly (6) abuts against the limiting piece (51); when the posture of the functional iron stand is switched from the leisure posture state to the lying posture state, the extension piece (72) maintains an extended state.

13. The utility shelf according to any one of claims 7 to 12, wherein, The distance S between the lowest point of the mounting structure (1) and the support base is in the range of 11cm≤S≤17cm; wherein, the seat frame mechanism (5), the foot pedal mechanism (7), the backrest mechanism (8) and the driving mechanism (9) are arranged above the mounting structure (1).

14. A movable sofa, characterized in that The functional iron stand according to any one of claims 7 to 13. The functional iron stand according to any one of claims 7 to 13.

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