Adjustment mechanism, armrest and seat

Abstract

An adjustment mechanism, an armrest and a seat. The adjustment mechanism is simple and practical; by hinging a linkage rod (25) to a linkage end (b) of a first link (22) and a linkage end (b) of a second link (23), when the adjustment mechanism is subjected to an external force, the linkage rod (25) can generate a tendency to move, enabling connecting components (21) to quickly open and close. Further provided is an armrest. The adjustment mechanism is arranged as an adjustment module (2) between a fixed vertical plate (11) and movable vertical plate (12) of the armrest, thus achieving opening and closing of the armrest; when the width of the armrest changes, selective matching of the total length of the first link (22) and the second link (23) can be realized according to the change of the width of the armrest, thereby enabling the adjustment mechanism to adapt to armrests of different width specifications. Further provided is a seat. By symmetrically arranging the armrests on two sides of a seat body, the volume on left and right sides of the seat can be freely changed, such that the seat occupies less space during packaging, thereby further reducing the packaging cost.

Description

Adjusting mechanism, armrest and seat TECHNICAL FIELD

[0001] The present application relates to the field of furniture, in particular to an adjusting mechanism, an armrest and a seat. BACKGROUND

[0002] A sofa generally comprises a seat assembly and a back assembly, and the seat assembly has armrests on both sides. Traditional armrests are usually made of metal or wood. Such armrests are heavy. Therefore, in order to reduce the cost of product packaging and transportation, some manufacturers set the sofa armrests as hollow side plate structures. Such a sofa armrest comprises a fixed inner side plate connected to the sofa, and movable outer side plates arranged in parallel and spaced apart on the left and right of the fixed inner side plate. In order to enable the movable outer side plates to be extended and retracted left and right relative to the fixed inner side plate, an adjusting mechanism is arranged between the two. By the action of the adjusting mechanism, the movable outer side plates can be freely moved closer to or away from the fixed inner side plate, thereby reducing the overall packaging volume of the sofa and improving the cabinet loading capacity of the sofa under the premise of ensuring the supporting function of the armrests.

[0003] For example, in the patent with the announcement number CN116584780, as shown in Figure 1 of the patent, two left and right spaced apart mounting base plates 1 are provided with a compression assembly. The compression assembly comprises a first support rod 4 and a second support rod 5. The upper end of the second support rod 5 is connected to a sliding rod 6 which is in sliding cooperation with a sliding groove 2 on one of the mounting base plates 1. By controlling the mutual rotation of the two sliding rods 6, the upper end of the sliding rod 6 can be moved up and down along the sliding groove 2, so that the two mounting base plates 1 can be folded and unfolded. As can be seen, the design relies on the rotation of the first support rod 4 and the second support rod 5 to generate a pushing force, and the sliding rod 6 slides in the sliding groove 2, thereby changing the distance between the two mounting base plates 1 and realizing the unfolding or folding of the armrest. However, when the specifications of the armrest change, i.e. the width between the movable outer side plate and the fixed inner side plate changes, the parameters of the scissor-type telescopic assembly also need to be changed.

[0004] In order to realize the telescopic function, the lengths of the first support rod 4 and the second support rod 5 in the scissor-type structure need to be greater than the distance between the two mounting base plates 1. Therefore, when the specifications of the armrest change, the lengths of the first support rod 4 and the second support rod 5 need to be determined according to the width of the armrest. For example, when the width of the armrest increases and is in an unfolded state, the first support rod 4 and the second support rod 5 are also unfolded. However, since the width of the armrest increases, the angle of the first support rod 4 and the second support rod 5 relative to the horizontal plane will decrease, so that when the armrest is folded, it will be stuck. At this time, the lengths of the first support rod 4 and the second support rod 5 need to be increased. When the width of the armrest decreases, the angle of the first support rod 4 and the second support rod 5 relative to the horizontal plane increases when they are unfolded, although it will not be stuck, but it will cause waste of the materials of the first support rod 4 and the second support rod 5.

[0005] When the width between the movable outer panel and the fixed inner panel of the armrest changes, in order to freely open or fold the armrest of various specifications, and to ensure the reasonable use cost of the material, the parameters of the first supporting rod 4, the second supporting rod 5 and the sliding groove 2 need to be re-calculated and determined, which is complicated; therefore, it is difficult to use as a modular component on armrests of different specifications, thereby resulting in great limitations in use of the structure. Technical solutions

[0006] In order to solve the above technical problems, the purpose of the present application is to provide an adjusting mechanism, which is simple and practical, by hingedly connecting a linkage rod to the linkage end of the first connecting rod and the linkage end of the second connecting rod; when the adjusting mechanism is subjected to an external force, the linkage rod can generate a movement tendency and drive the connecting end of the first connecting rod and the connecting end of the second connecting rod to drive the two connecting components to approach or move away from each other, so that the connecting components can be quickly opened or quickly folded.

[0007] Further, an armrest is provided, which arranges the adjusting mechanism as an adjusting module between the fixed vertical panel and the movable vertical panel of the armrest, to realize the opening or folding of the armrest; when the width of the armrest changes, the total length of the first connecting rod and the second connecting rod can be selectively matched according to the change of the width of the armrest, so that the adjusting mechanism can be applied to armrests of different width specifications.

[0008] Further, a seat is provided, which symmetrically arranges the armrests on both sides of the seat body, so that the volume of the left and right sides of the seat can be freely changed, so that the space occupied by the seat when packing is smaller, thereby further reducing the packing cost of the sofa.

[0009] The technical solutions of the present application are as follows:

[0010] An adjusting mechanism, comprising:

[0011] A connecting assembly, comprising two spaced-apart connecting components, the two connecting components having an open state of moving away from each other and a folding state of approaching each other; and at least two adjusting rod groups arranged side by side are arranged between the two connecting components;

[0012] An adjusting rod group, comprising a first connecting rod and a second connecting rod hingedly connected to the two connecting components, the first connecting rod and the second connecting rod each comprising a connecting end hingedly connected to the connecting component and a linkage end away from the connecting end;

[0013] A linkage rod, the linkage rod being hingedly connected to the linkage end of the first connecting rod and the linkage end of the second connecting rod in each adjusting rod group;

[0014] The adjusting mechanism can drive the first connecting rod and the second connecting rod in each adjusting rod set to rotate and make the two connecting components move away from or close to each other under the action of external force, so as to switch the connecting assembly between the open state and the folding state.

[0015] Preferably, a synchronous structure is arranged between the first connecting rod and the second connecting rod, the synchronous structure comprising a first tooth portion arranged on the linkage end of the first connecting rod and a second tooth portion arranged on the linkage end of the second connecting rod; the first tooth portion and the second tooth portion are engaged with each other to ensure that the first connecting rod and the second connecting rod rotate synchronously; thereby avoiding affecting the folding or opening effect between the two connecting components due to the inconsistent rotation angles of the first connecting rod and the second connecting rod.

[0016] Preferably, a limiting structure is arranged between the first connecting rod and the second connecting rod, the limiting structure comprising a first limiting surface arranged on the linkage end of the first connecting rod and a second limiting surface arranged on the linkage end of the second connecting rod; when the connecting assembly is in the folding state, the first limiting surface is separated from the second limiting surface; when the connecting assembly is switched to the open state, the first limiting surface abuts against the second limiting surface; the limiting structure can make the first connecting rod and the second connecting rod remain fixed after the two connecting components are opened, avoiding the situation that the connecting components are folded due to accidental touch.

[0017] Preferably, the first connecting rod and the second connecting rod have the same length; the first connecting rod and the second connecting rod with the same length can ensure that the two connecting components are opened or folded in the same direction when rotating, and will not be misaligned when folded or opened due to different lengths.

[0018] Preferably, the connecting component is an L-shaped plate made of metal, and the two L-shaped plates are arranged in a central symmetry; in the folding state of the connecting assembly, an accommodation area for accommodating the adjusting rod set and the linkage rod is formed between the inner sides of the two L-shaped plates; the accommodation area can provide space for the linkage rod and the adjusting rod set in the folding state, so that they will not be exposed.

[0019] Preferably, the L-shaped plate comprises a first vertical plate and a second vertical plate perpendicular to each other, the connecting end of the first connecting rod is hinged to the first vertical plate of one of the L-shaped plates, and the connecting end of the second connecting rod is hinged to the first vertical plate of the other L-shaped plate; the second vertical plate extends in a direction perpendicular to the first vertical plate, thereby forming two protruding portions between the two L-shaped plates, which protrude out of the accommodation area in opposite directions; the two protruding portions in opposite directions can form two opposite mounting portions, so as to facilitate the connection between the connecting component and other components that need to be folded or opened.

[0020] As preferred, the exceeding part of the second vertical plate is provided with a through connecting notch; the connecting notch can facilitate the fastener to be arranged, so that the connecting part is fastened with other parts which need to be folded or unfolded.

[0021] As preferred, the first connecting rod, the second connecting rod and the linkage rod are all made of metal rigid rods; the metal rigid rods have high structural strength and strong deformation resistance, so that the service life of the adjusting mechanism is longer.

[0022] Further, the application provides a handrail, which comprises movable vertical plates and fixed vertical plates arranged in parallel and at intervals, and at least one adjusting mechanism; the two connecting parts of the adjusting mechanism are connected with the movable vertical plates and the fixed vertical plates respectively, so as to drive the movable vertical plates of the handrail to move away from or close to the fixed vertical plates, thereby switching the handrail between the unfolded state and the folded state.

[0023] As preferred, two adjusting mechanisms are arranged symmetrically in front of and behind the movable vertical plates and the fixed vertical plates, and the adjusting rod groups of the adjusting mechanisms are arranged in an upper-lower side-by-side manner; the two adjusting mechanisms arranged in front of and behind the movable vertical plates and the fixed vertical plates in a side-by-side manner can make the front and rear ends of the movable vertical plates and the fixed vertical plates be folded or unfolded synchronously.

[0024] As preferred, the application further comprises a linkage handle, the front and rear ends of which are fixedly connected to the upper ends of the two linkage rods arranged symmetrically in front of and behind; the linkage handle can synchronously link the two adjusting mechanisms arranged in front of and behind, so that the two adjusting mechanisms simultaneously drive the movable vertical plates and the fixed vertical plates to be unfolded or folded.

[0025] As preferred, the application further comprises a handrail cover wrapped between the movable outer side plates and the fixed vertical plates; when the handrail is in the unfolded state, the upper ends of the movable vertical plates and the fixed vertical plates are provided with flexible support surfaces in a horizontal tension state; the flexible support surfaces can place soft bag support materials on the handrail, thereby improving the comfort of the handrail.

[0026] As preferred, when the handrail is in the folded state, the linkage handle protrudes upwardly from the movable vertical plates and the fixed vertical plates, and the handrail cover is tensioned upwardly; when the handrail is switched to the unfolded state, the linkage handle is flush with the upper ends of the movable vertical plates and the fixed vertical plates, and forms a rigid support for the flexible support surfaces which are horizontally tensioned at the upper ends of the handrail; when the handrail is folded, the outer surface of the handrail cover tensioned under the action of the linkage handle remains in a flat state without wrinkles; when the handrail is unfolded, the load bearing capacity of the flexible support surfaces is increased under the support of the linkage handle, and the flexible support surfaces will not be inwardly concave due to insufficient support when the soft bag materials are placed.

[0027] Further, the application provides a seat, which comprises a seat body and two handrails, the handrails being arranged symmetrically on the left and right sides of the seat body, and the fixed vertical plates of the handrails being connected with the seat body.

[0028] The principle and beneficial effects of the application adopting the above technical scheme are:

[0029] The purpose of the present invention is to provide an adjustment mechanism, which is achieved by hingedly connecting a linkage rod to the linkage end of a first link and the linkage end of a second link; when the adjustment mechanism is subjected to external force, the two connecting parts move closer to or away from each other, and the first link and the second link rotate so that the angle between the two becomes smaller or larger, and the linkage rod drives the adjustment rod group to move synchronously; compared with the technical solution of using a rotating rod and a slide groove of a scissor-type structure, this solution omits the design of the slide groove, and only drives the first link and the second link to rotate by the linkage rod to open or close the two connecting parts, so its structure is further simplified and its practicality is greatly improved.

[0030] Furthermore, an armrest is provided, which realizes rapid opening or folding of the armrest by arranging the adjustment mechanism as an adjustment module between the fixed vertical plate and the movable vertical plate of the armrest; when the width of the armrest changes, it is only necessary to change the total length of the first link and the second link in the adjustment mechanism according to the change in the width of the armrest, so that it matches the distance between the connecting parts to form an adjustment module corresponding to the width specification of the armrest, thereby realizing rapid opening or folding of the armrest of the corresponding width specification; after the width of the armrest changes, compared with the technical solution of using a rotating rod and a slide groove of a scissor-type structure, this solution only needs to change the total length of the first link and the second link accordingly, and there is no need to recalculate the slide groove or other parameters, so it is more suitable for armrests with different width specifications.

[0031] Furthermore, a seat is provided, in which armrests are symmetrically arranged on both sides of the seat body, so that the volumes of the left and right sides of the seat can be freely changed, so that the seat occupies less space when packed. When packing, the limited space in the box can accommodate more seats, so the seat equipped with such armrests can further reduce the packing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a schematic structural diagram of an embodiment in which an adjustment mechanism is installed on armrests on both sides of a sofa;

[0033] Figure 2 is a schematic structural diagram of the adjustment mechanism;

[0034] FIG3 is an exploded view of the hinge between the linkage rod and the adjustment rod assembly;

[0035] FIG4 is a schematic diagram of the accommodating area when the connecting member is in the retracted state;

[0036] FIG5 is a schematic diagram of the connecting member in the retracted state, with the adjustment mechanism retracted into the accommodating area;

[0037] Figure 6a is a cross-sectional view of the upper end of the linkage handle forming a rigid support for the flexible support surface;

[0038] Figure 6b is a cross-sectional view of the upper end of the linkage handle being tightened upward against the flexible support surface;

[0039] Fig. 7 is a structural schematic diagram of the first connecting rod;

[0040] Fig. 8 is a structural schematic diagram of the second connecting rod;

[0041] Fig. 9 is a structural schematic diagram of the linkage rod;

[0042] Fig. 10 is a structural schematic diagram of the upper end of the linkage handle being taut upward on the flexible support surface on the armrest;

[0043] Fig. 11 is a structural schematic diagram of the upper end of the linkage handle forming a rigid support on the flexible support surface on the armrest;

[0044] Fig. 12 is a structural schematic diagram of the adjusting mechanism in Embodiment 2;

[0045] Fig. 13 is a structural schematic diagram of the first connecting rod in Embodiment 2;

[0046] Fig. 14 is a structural schematic diagram of the second connecting rod in Embodiment 2;

[0047] Fig. 15 is a schematic diagram of the adjusting mechanism in Embodiment 3;

[0048] The reference signs are as follows: 1 - sofa body, 2 - adjusting module, 3 - linkage handle, 4 - armrest cover, 11 - fixed upright plate, 12 - movable upright plate, 13 - armrest module, 21 - connecting part, 22 - first connecting rod, 23 - second connecting rod, 24 - rotating shaft, 25 - linkage rod, 26 - shaft sleeve, 27 - washer, 211 - connecting notch, 212 - first upright plate, 213 - second upright plate, 214 - avoiding hole, 221 - first tooth part, 222 - first limiting surface, 231 - second tooth part, 232 - first horizontal part, 233 - bending part, 234 - second horizontal part, 235 - second limiting surface, 251 - protruding part, 252 - avoiding area, 253 - hinged hole, 254 - connecting rod, 255 - hinged part, 41 - flexible support surface, a - connecting end, b - linkage end, c - overhanging part, s - accommodating area. Embodiments of the present application

[0049] In order to enable a clearer understanding of the above-mentioned purposes, features and advantages of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0050] The present application has various embodiments, as shown in Figs. 1-15, and the specific embodiments are as follows:

[0051] Embodiment 1: As shown in Figs. 1-11, the present embodiment provides an adjusting mechanism, comprising:

[0052] The connecting assembly comprises two spaced connecting components 21, the two connecting components 21 have an open state away from each other and a folding state close to each other, and at least two adjusting rod groups are arranged side by side between the two connecting components 21.

[0053] The adjusting rod group comprises a first connecting rod 22 and a second connecting rod 23 respectively hinged with the two connecting components 21, the first connecting rod 22, the second connecting rod 23 and the linkage rod 25 are all rigid rod members made of metal; the metal rigid rod member has high structural strength and strong deformation resistance, so that the service life of the adjusting mechanism is longer; the first connecting rod 22 and the second connecting rod 23 each comprise a connecting end a hinged with the connecting component 21 and a linkage end b away from the connecting end a.

[0054] The linkage rod 25 is hinged with the linkage end b of the first connecting rod 22 and the linkage end b of the second connecting rod 23 in each adjusting rod group.

[0055] The adjusting mechanism can drive the first connecting rod 22 and the second connecting rod 23 in each adjusting rod group to rotate while the linkage rod 25 has a movement trend under the action of an external force, and the object of the external force can be the linkage rod 25 or the connecting component 21; the rotating first connecting rod 22 and the second connecting rod 23 can make the two connecting components 21 away from each other or close to each other, so as to switch the connecting assembly between the open state and the folding state.

[0056] Further, as shown in FIG. 3, the two ends of the adjusting rod group are hinged with the linkage rod 25 and the connecting component 21 as follows: corresponding hinge holes 253 are provided on the first connecting rod 22, the second connecting rod 23, the connecting component 21 and the linkage rod 25, a rotating shaft 24 is provided in the hinge hole 253 to provide support for the rotation of the adjusting rod group or the linkage rod 25, in order to avoid direct friction between the rotating shaft 24 and the inner wall of the hinge hole 253, a shaft sleeve 26 is arranged between the rotating shaft 24 and the inner wall of the hinge hole 253, the shaft sleeve 26 can separate the rotating shaft 24 from the inner wall of the hinge hole 253 to avoid wear of the inner wall of the hinge hole 253; in order to avoid friction between the contact end faces of the rod members or between the contact end faces of the connecting component 21 and the adjusting rod group, a washer 27 is arranged between the contact end faces of the rod members or between the contact end faces of the connecting component 21 and the adjusting rod group to separate them.

[0057] Further, as shown in FIG. 9, the linkage rod 25 comprises a hinged end 255, two symmetrical hinge holes 253 are provided on the hinged end 255, the first connecting rod 22 and the second connecting rod 23 are hinged on the hinged end 255, a connecting rod 254 is integrally formed between every two hinged ends 255, the connecting rod 254 can connect all the hinged ends 255 to make the adjusting rod groups hinged by the multiple hinged ends 255 rotate simultaneously.

[0058] Further, as shown in FIG. 2, FIG. 7, FIG. 8, if the angles of the first connecting rod 22 and the second connecting rod 23 are inconsistent when rotating, the two connecting components 21 connected thereto will appear to be non-parallel, which will affect the folding or opening effect between the two connecting components 21, so a synchronization structure is provided between the first connecting rod 22 and the second connecting rod 23, the synchronization structure includes a first tooth portion 221 provided on the linkage end b of the first connecting rod 22, and a second tooth portion 231 provided on the linkage end b of the second connecting rod 23; the first tooth portion 221 and the second tooth portion 231 are engaged with each other to ensure that the first connecting rod 22 and the second connecting rod 23 rotate synchronously; thereby avoiding the phenomenon that the folding or opening effect between the two connecting components 21 is affected due to the inconsistent rotation angles of the first connecting rod 22 and the second connecting rod 23.

[0059] Further, when the two connecting components 21 are completely folded, the first connecting rod 22 and the second connecting rod 23 are rotated to a state of approaching each other; when the two connecting components 21 are completely opened, the first connecting rod 22 and the second connecting rod 23 are rotated to a horizontal state, in order to make the first connecting rod 22 and the second connecting rod 23 in the horizontal state not rotate again, and make the two connecting components 21 remain fixed, a limiting structure is provided between the first connecting rod 22 and the second connecting rod 23, the limiting structure includes a first limiting surface 222 provided on the linkage end b of the first connecting rod 22, and a second limiting surface 235 provided on the linkage end b of the second connecting rod 23; when the connecting assembly is in the folding state, the first limiting surface 222 is separated from the second limiting surface 235; when the connecting assembly is switched to the opening state, the first limiting surface 222 abuts against the second limiting surface 235; the limiting structure can make the first connecting rod 22 and the second connecting rod 23 remain fixed after the two connecting components 21 are opened, avoiding the situation that the connecting components 21 are folded due to accidental touch.

[0060] Further, in the opening state of the connecting assembly, the first connecting rod 22 and the second connecting rod 23 are rotated to a horizontal state, at this time the first tooth portion 221 and the second tooth portion 231 are still engaged with each other; when one of the first tooth portion 221 and the second tooth portion 232 has a tendency to rotate, the other stationary tooth portion can limit the rotation of the corresponding tooth portion; specifically, since the linkage rod 25 is a rod member that links the first connecting rod 22 and the second connecting rod 23 to rotate simultaneously, therefore in the state that the linkage rod 25 remains stationary, when one of the first connecting rod 22 and the second connecting rod 23 in the horizontal state has a tendency to rotate under the action of external force, the other rod remains stationary, which makes the first tooth portion 221 and the second tooth portion 232 not have a tendency to rotate simultaneously, so the stationary one of the first tooth portion 221 and the second tooth portion 232 will form a rotation limiting for the one that will rotate, thereby avoiding the connecting assembly switching to the folding state under the action of accidental touch or interference force.

[0061] Further, in order to keep the two connecting components 21 parallel to each other in the open or folded state, the first link 22 and the second link 23 have the same length; the trajectories of the first link 22 and the second link 23 coincide when they rotate, thus ensuring that the two connecting components 21 open or fold in the same direction and do not misalign when folded or opened due to different lengths.

[0062] Further, as shown in Figs. 4-5, the connecting component 21 is an L-shaped plate made of metal, and the two L-shaped plates are arranged symmetrically about the center; in the folded state, the two L-shaped plates are staggered with each other; the inner sides of the two L-shaped plates form a receiving area s for accommodating the adjusting rod set and the linkage rod 25; the receiving area s is a rectangular area surrounded by the corners of the two L-shaped plates, which provides space for the linkage rod 25 and the adjusting rod set in the folded state, so that they are not exposed to the outside.

[0063] Further, the L-shaped plate includes a first vertical plate 213 and a second vertical plate 212 perpendicular to each other, the connecting end a of the first link 22 is hinged to the first vertical plate 213 of one of the L-shaped plates, and the connecting end a of the second link 23 is hinged to the first vertical plate 213 of the other L-shaped plate; the second vertical plate 212 extends in a direction perpendicular to the first vertical plate 213, thereby forming two overhanging portions c between the two L-shaped plates, which extend in opposite directions beyond the receiving area s; the two overhanging portions c in opposite directions provide mounting positions, so that the L-shaped plate is convenient to connect with other components that need to be folded or opened, which are usually two vertical plates on a handrail; when mounted, since the two overhanging portions c are located on opposite sides, there is no need to worry about the installation space being crowded or the fasteners interfering.

[0064] Further, the overhanging portion c of the second vertical plate 212 is provided with a through connecting slot 211; the connecting slot 211 can facilitate the installation of fasteners, so that the connecting component 21 is fastened and connected with other components that need to be folded or opened.

[0065] Further, the two L-shaped plates are arranged staggered with each other, and the first vertical plates 213 are not in the same plane, so in the adjusting rod set, the first link 22 is a straight rod, and the second link 23 is not a straight rod; the second link 23 includes a first horizontal portion 232 hinged to the first vertical plate 213 of one of the connecting components 21, the first horizontal portion 232 extends toward the plane in which the first vertical plate 213 of the other connecting component 21 is located, forms a bending portion 233, and the bending portion 233 extends horizontally to form a second horizontal portion 234 hinged to the linkage rod 25; through this bending structure design, the two first vertical plates 213 which are not in the same plane can be smoothly hinged through the second link 23.

[0066] Further, as shown in FIG. 3-9, in the folded state, the first connecting rod 22 and the second connecting rod 23 are driven by the linkage rod 25 to rotate to the side-by-side state. In order to avoid interference between the folded connecting assembly and the adjusting rod assembly or the linkage rod 25, the adjusting mechanism is further provided with a plurality of avoiding structures. Specifically, in order to avoid interference between the bent portion 233 and the linkage rod 25, the intersection position of the hinged end of the linkage rod 25 and the connecting rod is provided with an avoiding area 252 avoiding the bent portion 233. Meanwhile, in order to avoid interference between the hinged end 253 of the linkage rod 25 and the L-shaped plate, the L-shaped plate is further provided with a through avoiding hole 214 at the corresponding position.

[0067] As shown in FIG. 1, on the basis of the adjusting mechanism, a handrail is further provided, which comprises left and right parallel and spaced apart movable vertical plates 12 and fixed vertical plates 11, and at least one adjusting mechanism; the adjusting mechanism is arranged between the movable vertical plates 12 and the fixed vertical plates 11 as an adjusting module 2; wherein the two connecting components 21 of the adjusting mechanism are connected with the movable vertical plates 12 and the fixed vertical plates 11 respectively to drive the movable vertical plates 12 of the handrail away from or close to the fixed vertical plates 11, so as to switch the handrail between the open state and the folded state.

[0068] When the width of the handrail changes, that is, the interval distance between the movable vertical plates 12 and the fixed vertical plates 11 changes, the user can change the total length of the first connecting rod 22 and the second connecting rod 23 in the adjusting module 2 according to the interval distance between the movable vertical plates 12 and the fixed vertical plates 11. When changing, the total length of the first connecting rod 22 and the second connecting rod 23 is configured to be not less than the interval distance between the movable vertical plates 12 and the fixed vertical plates 11, and then the old total length of the first connecting rod 22 and the second connecting rod 23 is disassembled, and the first connecting rod 22 and the second connecting rod 23 with the changed length are installed in the adjusting module 2. Compared with other complicated adjusting mechanisms, the adjusting module 2 in the embodiment does not need to recalculate a plurality of parameters, but only needs to change the first connecting rod 22 and the second connecting rod 23 with different lengths, so it is more suitable for handrails with different width specifications.

[0069] Further, as shown in FIG. 1, in order to make the positions of the movable vertical plates 12 and the fixed vertical plates 11 open or fold synchronously, two adjusting mechanisms are symmetrically arranged in front of and behind the movable vertical plates 12 and the fixed vertical plates 11, and the adjusting rod assembly of the adjusting mechanism is configured to be arranged in an upper and lower side-by-side manner. The two adjusting mechanisms arranged in front of and behind in a side-by-side manner can make the front and rear ends of the movable vertical plates 12 and the fixed vertical plates 11 fold or open synchronously.

[0070] Further, as shown in Fig. 1, the armrest further comprises a linkage handle 3, the front and rear ends of which are fixedly connected to the upper ends of two front and rear symmetrical linkage rods 25; the upper end of the linkage rod 25 is provided with a protruding part 251 extending upward, and the protruding part 251 is connected to the lower end of the linkage handle 3 by a screw; the linkage handle 3 can be pulled up and down under the action of an external force, and synchronously link two front and rear arranged adjusting mechanisms, so that the two adjusting mechanisms simultaneously drive the opening or folding of the movable upright plate 12 and the fixed upright plate 11.

[0071] Further, as shown in Figs. 6a-6b, the armrest further comprises an armrest cover 4 wrapped between the movable outer plate and the fixed upright plate 11; when the armrest is in an open state, the armrest cover 4 forms a flexible support surface 41 in a horizontal tension state on the upper end of the movable upright plate 12 and the fixed upright plate 11; the flexible support surface 41 can place soft packaging materials on the armrest and form a flexible support for the arm, thereby improving the comfort of the armrest.

[0072] Further, the linkage handle 3 also acts on the flexible support surface 41 of the armrest cover 4 when pulling and opening or folding the armrest; when the armrest is in a folded state, the linkage handle 3 protrudes upward from the movable upright plate 12 and the fixed upright plate 11, and makes the armrest cover 4 tension upward; when the linkage handle 3 is pressed downward, the armrest is switched to an open state, the linkage handle 3 is flush with the upper end of the movable upright plate 12 and the fixed upright plate 11, and forms a rigid support for the flexible support surface 41 which is horizontally tensioned at the upper end of the armrest; the outer surface of the armrest cover 4 which is tensioned under the action of the linkage handle 3 remains flat without wrinkles when the armrest is folded, ensuring the beauty of the armrest cover 4; when the armrest is opened, the load bearing capacity of the flexible support surface 41 is increased under the support of the linkage handle 3, and the flexible support surface 41 will not appear inwardly concave due to insufficient support when placing soft packaging materials.

[0073] As shown in Figs. 10-11, on the basis of the armrest, a seat is further provided, which can be a sofa, comprising a sofa body 1 and two armrests, the armrests being symmetrically arranged on the left and right sides of the sofa body 1, and the fixed upright plate 11 of the armrest being connected to the sofa body 1; in the sofa, the armrest is arranged on the left and right sides of the sofa body 1 as an armrest module 13, thereby saving space when the sofa is packed.

[0074] Further, most of the armrests installed on sofas are kept in contact with the ground like the sofa body, but some armrests on sofas are not in contact with the ground but kept in a suspended state, and when the armrest is pressed by the arm or the body, the movable upright plate 12 of the armrest can be dislocated upward and downward with the fixed upright plate 13, so the structural advantages of the first tooth part 221 and the second tooth part 231 in the adjusting module 2 can be embodied on such a suspended armrest, for example, when the connecting part 21 connected by the first connecting rod 22 is connected with the movable upright plate 12 and the connecting part 21 connected by the second connecting rod 23 is connected with the fixed upright plate 13, when the movable upright plate 12 tends to move downward, the force is transmitted to the first connecting rod 22, so that the first connecting rod 22 drives the first tooth part 221 to tend to rotate in the opposite direction, at this time, the first tooth part 221 is limited by the second tooth part 231, so that the movable upright plate 12 can be kept in a stable supporting state and the dislocation phenomenon that one side of the armrest is high and the other side is low does not occur.

[0075] Embodiment 2: As shown in FIGS. 12-14, the difference between this embodiment and embodiment 1 is that the adjusting mechanism in this embodiment is not provided with the first tooth part 221 and the second tooth part 235 in the limiting structure on the linkage end b of the first connecting rod 22 and the second connecting rod 23, and the adjusting mechanism in this embodiment can also realize the opening or folding of the connecting assembly by the driving of the linkage 25, and under the premise that the first tooth part 221 and the second tooth part 235 are not provided, the adjusting mechanism in this embodiment is suitable for armrests with smaller volume and size, and the spacing distance of such armrests is short, so even if the rotation is inconsistent, it will not affect the normal opening or folding of the armrest.

[0076] Embodiment 3: As shown in FIG. 15, the difference between this embodiment and embodiments 1 and 2 is that the linkage end b of the first connecting rod 22 and the linkage end b of the second connecting rod 23 are not hinged at two positions of the linkage rod 25 but at the same point on the linkage rod 25, and when the external force acts on the linkage rod 25 or the connecting part 21, the linkage rod 25 can also drive the first connecting rod 22 and the second connecting rod 23 to realize the opening or folding of the connecting assembly and achieve the same effect as in the above embodiments.

[0077] The above describes the present application and its embodiments in a schematic manner, which is not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired thereby and designs a similar structural mode and embodiment without departing from the purpose of the present application, it shall belong to the protection scope of the present application.

Claims

1. An adjustment mechanism, characterized by The connecting assembly comprises two spaced connecting components (21), the two connecting components (21) have an open state away from each other and a folded state close to each other, and at least two adjusting rod groups are arranged side by side between the two connecting components (21). The adjusting rod group comprises a first connecting rod (22) and a second connecting rod (23) respectively hinged to the two connecting components (21), and the first connecting rod (22) and the second connecting rod (23) each comprise a connecting end (a) hinged to the connecting component (21) and a linkage end (b) away from the connecting end (a). The linkage rod (25) is hinged to the linkage end (b) of the first connecting rod (22) and the linkage end (b) of the second connecting rod (23) in each adjusting rod group. The adjusting mechanism can drive the first connecting rod (22) and the second connecting rod (23) in each adjusting rod group to rotate and make the two connecting components (21) away from or close to each other when the linkage rod (25) has a movement trend under the action of external force, so as to switch the connecting assembly between the open state and the folded state. The first connecting rod (22) and the second connecting rod (23) are provided with a synchronous structure, which comprises a first tooth portion (221) arranged on the linkage end (b) of the first connecting rod (22) and a second tooth portion (231) arranged on the linkage end (b) of the second connecting rod (23); the first tooth portion (221) and the second tooth portion (231) are meshed with each other to ensure that the first connecting rod (22) and the second connecting rod (23) rotate synchronously.

2. An adjustment mechanism according to claim 1, wherein: The first connecting rod (22) and the second connecting rod (23) are provided with a limiting structure, which comprises a first limiting surface (222) arranged on the linkage end (b) of the first connecting rod (22) and a second limiting surface (235) arranged on the linkage end (b) of the second connecting rod (23); when the connecting assembly is in the folded state, the first limiting surface (222) is separated from the second limiting surface (235); when the connecting assembly is switched to the open state, the first limiting surface (222) abuts against the second limiting surface (235).

3. An adjustment mechanism according to claim 1, wherein: The first connecting rod (22) and the second connecting rod (23) have the same length.

4. The adjustment mechanism of claim 1, wherein: The connecting component (21) is an L-shaped plate made of metal, and the two L-shaped plates are arranged in a central symmetry; the inner sides of the two L-shaped plates form an accommodation area (s) for accommodating the adjusting rod group and the linkage rod (25) when the connecting assembly is in the folded state.

5. The adjustment mechanism of claim 1, wherein: The L-shaped plate comprises a first vertical plate (213) and a second vertical plate (212) perpendicular to each other, the connecting end (a) of the first connecting rod (22) is hinged to the first vertical plate (213) of one of the L-shaped plates, and the connecting end (a) of the second connecting rod (23) is hinged to the first vertical plate (213) of the other L-shaped plate; the second vertical plate (212) extends in a direction perpendicular to the first vertical plate (213), so that the two L-shaped plates form two overhanging portions (c) extending beyond the accommodation area (s) in opposite directions.

6. An adjustment mechanism according to claim 5, wherein: The overhanging portion (c) of the second vertical plate (212) is provided with a through connecting notch (211).

7. An adjustment mechanism according to claim 6, wherein: The first connecting rod (22), the second connecting rod (23) and the linkage rod (25) are all rigid rod members made of metal.

8. The adjustment mechanism of claim 1, wherein: ​ 9. A handrail, characterized in that The handrail comprises left and right parallel and spaced movable upright plates (12) and fixed upright plates (11), at least one adjusting mechanism according to any one of claims 1-8; two connecting components (21) of the adjusting mechanism are connected with the movable upright plates (12) and the fixed upright plates (11) respectively to drive the movable upright plates (12) of the handrail away from or close to the fixed upright plates (11), so as to switch the handrail between the open state and the folded state.

10. A handrail according to claim 9, characterised in that: The two adjusting mechanisms are symmetrically arranged between the movable upright plates (12) and the fixed upright plates (11), and the adjusting rod groups of the adjusting mechanisms are arranged in an up-down side-by-side manner.

11. A handrail according to claim 10, wherein: The linkage handle (3) is fixedly connected to the upper ends of the two symmetrically arranged linkage rods (25).

12. A handrail according to claim 11, characterised in that: The handrail further comprises a handrail cover (4) wrapped between the movable outer side plates and the fixed upright plates (11); when the handrail is in the open state, the handrail cover (4) forms a flexible support surface (41) in a horizontal tension state on the upper ends of the movable upright plates (12) and the fixed upright plates (11).

13. A handrail according to claim 12, characterised in that: When the handrail is in the folded state, the linkage handle (3) protrudes upward from the movable upright plates (12) and the fixed upright plates (11), and the handrail cover (4) is tensioned upward; when the handrail is switched to the open state, the linkage handle (3) is flush with the upper ends of the movable upright plates (12) and the fixed upright plates (11), and forms a rigid support for the flexible support surface (41) of the upper end of the handrail which is horizontally tensioned.

14. A seat characterized in that, The seat further comprises a seat body (1) and two handrails according to any one of claims 9-13, the handrails being symmetrically arranged on the left and right sides of the seat body (1), and the fixed upright plates (11) of the handrails being connected with the seat body (1).

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