CN218551874U - Sofa support and seat unit - Google Patents

Abstract

The utility model provides a sofa support and a seat unit, wherein, the sofa support comprises a first driving connecting rod and a supporting connecting rod which are hinged to a mounting frame; the folding stool comprises a support connecting rod, a first extension connecting rod, a second extension connecting rod and a main footrest connecting rod, wherein one end of the first extension connecting rod is hinged to the free end of the support connecting rod, and the first extension connecting rod is hinged to the main footrest connecting rod; one end of the second extension connecting rod is hinged to the main footrest connecting rod, the hinged point of the second extension connecting rod is a second hinged point, and the hinged point between the second extension connecting rod and the supporting connecting rod is a third hinged point; when the first driving connecting rod rotates around a hinge point of the first driving connecting rod and the mounting rack, a rod section, located between the second hinge point and the third hinge point, of the first extension connecting rod is defined as a main rod section, and when the first extension connecting rod is observed from the outer side of the second extension connecting rod along the axial direction of a rotating shaft of the first driving connecting rod, the upper edge of the main rod section can be shielded by the second extension connecting rod. The utility model discloses can prevent that the second from extending connecting rod and first extension connecting rod to cause the clamp to hinder to the user.

Description

Sofa support and seat unit

Technical Field

The utility model relates to a sofa support technical field especially relates to a sofa support and seat unit.

Background

The functional sofa is a multifunctional sofa, and can be deformed through a special structural design, so that the requirements of a user for sitting, lying or massaging and the like are met. In order to provide support to the lower limbs of a user during use, the support frame of a functional sofa typically includes a leg extension assembly and a mounting bracket. Most of the existing leg stretching assemblies are planar four-bar mechanisms, the structure is simple and convenient to assemble, but gaps between a group of opposite sides of the structure are easy to clamp a user in the posture adjustment process; and the structural support area that can provide the support for the user is limited, and blind increase the holding surface then can lead to the volume increase of shank extension subassembly, and the space between its and the ground diminishes after accomodating, and the user is difficult to carry out the health clearance to the ground in this region.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model discloses a first aim at provides a sofa support, and its second extends the connecting rod and can shelter from first extension connecting rod, prevents to cause the clamp to hinder to the user in the use.

Another object of the present invention is to provide a seat unit, which can provide support for the feet or the lower legs of the user, and is convenient to use.

The embodiment of the utility model discloses a realize through following technical scheme:

a sofa support comprising a leg stretch assembly and a mounting bracket connected to one another, the leg stretch assembly comprising a first drive link and a support link hinged to the mounting bracket; still include first extension connecting rod, second extension connecting rod, main foot bench connecting rod, vice foot bench connecting rod and second drive connecting rod, wherein: one end of the first extension connecting rod is hinged to the free end of the supporting connecting rod, the hinged point is a first hinged point, the other end of the first extension connecting rod is hinged to the second driving connecting rod, and the first extension connecting rod is hinged to the main footrest connecting rod; one end of the auxiliary footrest connecting rod is hinged to the main footrest connecting rod, and the free end of the second driving connecting rod is hinged to the auxiliary footrest connecting rod; one end of the second extension connecting rod is hinged to the main foot stool connecting rod, the hinged point of the second extension connecting rod is a second hinged point, and the other end of the second extension connecting rod is hinged to the free end of the first driving connecting rod; the second extending connecting rod and the supporting connecting rod are hinged between two end points of the second extending connecting rod and the supporting connecting rod, and the hinged point of the second extending connecting rod and the supporting connecting rod is a third hinged point; when the first driving connecting rod rotates around a hinge point of the first driving connecting rod and the mounting rack, a rod section, located between the second hinge point and the third hinge point, of the first extension connecting rod is defined as a main rod section, and when the first extension connecting rod is axially towards the first extension connecting rod along a rotating shaft of the first driving connecting rod from the outer side of the second extension connecting rod, the upper edge of the main rod section can be shielded by the second extension connecting rod.

According to a preferred embodiment, the hinged point of the first extension connecting rod and the main footrest connecting rod is a fifth hinged point, and the hinged point of the auxiliary footrest connecting rod and the main footrest connecting rod is a fourth hinged point; the second hinge point, the fifth hinge point and the fourth hinge point are not collinear.

According to a preferred embodiment, the second extension connecting rod is provided with a limiting bulge; the supporting connecting rod is provided with a containing notch and an extending notch which are matched with the limiting bulges; when the first driving connecting rod rotates, the accommodating notch is used for limiting the limiting protrusion to enable the leg stretching assembly to be in an accommodating state, and the extending notch is used for limiting the limiting protrusion to enable the leg stretching assembly to be in an extending state.

According to a preferred embodiment, the main footrest link is provided with a first mounting surface and the secondary footrest link is provided with a second mounting surface; when the leg stretching assembly is in the storage state, a first included angle is formed between the first assembling surface and the second assembling surface; when the leg stretching assembly is in the stretching state, a second included angle is formed between the first assembling surface and the second assembling surface.

According to a preferred embodiment, the hinge point of the first driving connecting rod and the second extending connecting rod is a sixth hinge point, and the limiting protrusions are distributed between the third hinge point and the sixth hinge point; accomodate the breach with extend the breach and all face spacing protruding setting.

According to a preferred embodiment, the second extension link comprises a lower working section and an upper working section connected to each other, the lower working section being connected to the first drive link, the upper working section being connected to the main footrest link; a first transition fillet is arranged at the joint of the lower working section and the upper working section, and the first transition fillet is distributed on one side close to the first hinge point; the first transition round angle is convexly arranged towards the first hinge point.

According to a preferred embodiment, the third hinge point and the sixth hinge point are both arranged on the lower working section.

According to a preferred embodiment, the first extension link comprises a front working section, a middle working section and a rear working section connected in sequence, wherein: the rear working section is connected to the support link; and a second transition fillet is arranged at the joint of the rear working section and the middle working section, and the second transition fillet is arranged in a protruding manner back to the first hinge point.

According to a preferred embodiment, the front working section comprises a working portion and a transition portion connected to each other, the transition portion being connected to the middle working section, the working portion being connected to the second drive link; the working portion is parallel to and non-coplanar with the middle working section.

According to a preferred embodiment, the hinge point between the support link and the mounting bracket is a seventh hinge point; a rotating shaft when the first driving connecting rod rotates around a hinge point of the first driving connecting rod and the mounting frame is defined as a reference shaft, and a plane perpendicular to the reference shaft is a reference plane; the distance between the projection point of the first hinge point in the reference plane and the projection point of the seventh hinge point in the reference plane is 200-240mm.

According to a preferred embodiment, the mounting comprises a seat frame and an adjustment assembly for adjusting the seat frame, wherein: the adjusting assembly comprises a fixed base plate, a rotary driving plate and an adjusting mechanism which are oppositely arranged, and the rotary driving plate is adjustably connected to the fixed base plate through the adjusting mechanism; the rotary drive plate is adjustably connected to the seat frame by at least two first connectors, a first end of which is hinged to the seat frame and the other end of which is hinged to the rotary drive plate.

According to a preferred embodiment, a hinge point of the first link and the seat frame is an eighth hinge point, and a hinge point of the first link and the rotary driving plate is a ninth hinge point; the distance between the projection point of the eighth hinge point in the reference plane and the projection point of the ninth hinge point on the same first connecting piece as the eighth hinge point in the reference plane is 110-150mm.

According to a preferred embodiment, the adjusting mechanism comprises a second, a third, a fourth, a fifth, a sixth, a seventh and an eighth link, wherein: the second connecting piece is provided with a first hinge hole and a second hinge hole, the second connecting piece is hinged to the rotary driving plate through the first hinge hole, the second connecting piece is hinged to the third connecting piece through the second hinge hole, and the second hinge hole is located between two end parts of the third connecting piece; the first end of the third connecting piece is hinged to the fixed base plate, and the second end of the third connecting piece is hinged to the first end of the fourth connecting piece; the second end of the fourth connecting piece is hinged to the fifth connecting piece, and the hinged point of the second end of the fourth connecting piece and the hinged point of the fifth connecting piece is positioned between the two ends of the fifth connecting piece; the first end of the fifth connecting piece is hinged to the second connecting piece, the hinged point of the first connecting piece and the second connecting piece is located between the first hinged hole and the second hinged hole, and the second end of the fifth connecting piece is hinged to the first end of the sixth connecting piece; a second end of the sixth connecting member is hinged to the fixed base plate; a first end of the seventh connecting piece is hinged to the sixth connecting piece, a hinge point of the seventh connecting piece and the sixth connecting piece is positioned between two end parts of the sixth connecting piece, and a second end of the seventh connecting piece is hinged to the rotary driving plate; the first end of the eighth connecting piece is hinged to the rotary driving plate, and the second end of the eighth connecting piece is hinged to the first driving connecting rod.

According to a preferred embodiment, a backrest assembly is arranged on the seat frame and comprises a backrest connecting block, a backrest limiting rod and a ninth connecting piece, the backrest connecting block is hinged with the backrest limiting block, one end of the ninth connecting piece is hinged between two end points of the backrest connecting block, the other end of the ninth connecting piece is hinged with the backrest limiting rod, a limiting column is arranged on the backrest limiting rod, and a limiting surface matched with the limiting column is arranged on the backrest limiting block; the backrest limiting block is fixedly connected to the seat frame.

According to a preferred embodiment, the backrest assembly further comprises a tenth connecting member, a first end of the tenth connecting member is hinged to the fixed base plate, and a hinged point of the tenth connecting member and the fixed base plate is a tenth hinged point; the second end of the tenth connecting piece is hinged to one end, far away from the backrest connecting block, of the backrest limiting rod, and the hinged point of the tenth connecting piece and the backrest limiting rod is an eleventh hinged point; the distance between the projection point of the tenth hinge point in the reference plane and the projection point of the eleventh hinge point in the reference plane is 65-100mm.

A seat unit comprises the sofa support.

The utility model discloses technical scheme has following advantage and beneficial effect at least:

the utility model provides a sofa support, through the structural design to first extension connecting rod and second extension connecting rod, make the upper edge of the pole section (main pole section) of first extension connecting rod between second hinge point and third hinge point coincide with second extension connecting rod in the pivot axial of first drive connecting rod, when the outside along the pivot axial of first drive connecting rod towards first extension connecting rod observation promptly, the upper edge of main pole section can be sheltered from by second extension connecting rod; the gap between the first extension connecting rod and the second extension connecting rod can further avoid clamping injury to a user in the posture adjustment process of the leg extension assembly, and the second extension connecting rod is used as a member bar of the leg extension assembly, so that the structural support connecting effect is achieved on one hand, the safety protection effect is achieved on the other hand, a specific anti-clamping injury component is not required to be added, the safety is guaranteed, and the structure of the sofa support is simplified; simultaneously, through the mode that sets up second drive connecting rod and vice ottoman connecting rod for vice ottoman connecting rod can carry out functional supplementary to a certain extent to main ottoman connecting rod when providing the support for the user, and vice ottoman connecting rod and main ottoman connecting rod provide the support for the user equally promptly, and vice ottoman connecting rod here can be accomodate, compact structure, and occupation space is little.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic perspective view of a leg stretching assembly provided in an embodiment of the present invention;

fig. 2 is a schematic front view of the leg stretching assembly according to the embodiment of the present invention in a stretching state;

fig. 3 is a schematic front view of the leg stretching assembly according to the embodiment of the present invention in a storage state;

fig. 4 is a schematic perspective view of a second extension link according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a first extending link according to an embodiment of the present invention;

fig. 6 is a schematic top view of a first extending link according to an embodiment of the present invention;

fig. 7 is a schematic perspective view of a support link according to an embodiment of the present invention;

fig. 8 is a schematic perspective view of a sofa support according to an embodiment of the present invention in a storage state;

fig. 9 is a schematic perspective view of a sofa support provided in an embodiment of the present invention in a half-extended state;

fig. 10 is a schematic perspective view of the sofa support provided in the embodiment of the present invention in an extended state;

fig. 11 is a schematic front view of the sofa support in the extended state according to the embodiment of the present invention;

fig. 12 is a rear view schematic structural view of the sofa support provided in the embodiment of the present invention in an extended state;

fig. 13 is a schematic front view of a first connecting member according to an embodiment of the present invention;

fig. 14 is a schematic front view of a tenth connecting member according to an embodiment of the present invention;

fig. 15 is a schematic perspective view of the sofa bracket provided by the embodiment of the present invention after the first driving member is assembled;

fig. 16 is a front view of the sofa support assembled to the seat unit according to the embodiment of the present invention;

fig. 17 is a front view schematic structural view of the sofa support in the lying position according to the embodiment of the present invention.

An icon: 1. a leg extension assembly; 11. a first drive link; 12. a support link; 121. stretching the notch; 122. a storage notch; 123. a third hinge hole; 124. a fourth hinge hole; 13. a second extension link; 131. an upper working section; 132. a lower working section; 133. a first transition fillet; 14. a main footrest connecting rod; 141. a first assembly face; 15. a first extension link; 151. a rear working section; 152. a middle working section; 153. a front working section; 1531. a transition section; 1532. a working part; 154. a second transition fillet; 16. a second drive link; 17. an auxiliary foot stool connecting rod; 171. a second assembly surface; 18. a limiting bulge; 191. a first hinge point; 192. a sixth hinge point; 193. a third hinge point; 194. a second hinge point; 195. A fourth hinge point; 196. a fifth hinge point; 197. a seventh hinge point; alpha, a first included angle; beta, a second included angle; 2. a mounting frame; 201. fixing the substrate; 202. rotating the drive plate; 21. a seat frame; 22. a first connecting member; 221. a fifth hinge hole; 222. a sixth hinge hole; 23. a second connecting member; 231. a first hinge hole; 24. a third connecting member; 25. a fourth connecting member; 26. a fifth connecting member; 27. a sixth connecting member; 28. a seventh connecting member; 29. an eighth connecting member; 3. a backrest assembly; 31. a backrest connecting block; 32. a backrest limiting block; 321. a limiting surface; 33. a backrest limit rod; 331. a limiting column; 34. a tenth connecting member; 341. a seventh hinge hole; 342. eighth hinge hole; 35. a ninth connecting member; 4. a first driving member; 41. a rear mounting tube; 42. the front is provided with a pipe.

Detailed Description

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 to 17, a sofa support comprises a leg stretching assembly 1 and a mounting frame 2 connected to each other, the leg stretching assembly 1 comprises a first driving link 11 and a supporting link 12 hinged to the mounting frame 2; and further includes a first extension link 15, a second extension link 13, a main ottoman link 14, an auxiliary ottoman link 17, and a second drive link 16, wherein: one end of the first extension link 15 is hinged to the free end of the support link 12 at a first hinge point 191, the other end of the first extension link 15 is hinged to the second drive link 16, and the first extension link 15 is hinged to the main footrest link 14; one end of the sub footrest link 17 is hinged to the main footrest link 14, and the free end of the second drive link 16 is hinged to the sub footrest link 17; one end of the second extension link 13 is hinged to the main footrest link 14 at a second hinge point 194, and the other end of the second extension link 13 is hinged to the free end of the first driving link 11; the second extension link 13 and the support link 12 are hinged between two end points of the two, and the hinged point is a third hinged point 193; the rod segment between the second hinge point 194 and the third hinge point 193, which defines the first extension link 15, is a main rod segment when the first drive link 11 rotates around its hinge point with the mount 2, and the upper edge of the main rod segment can be shielded by the second extension link 13 when viewed from the outside of the second extension link 13 along the rotation axis of the first drive link 11 axially toward the first extension link 15. The mounting frame 2 in this embodiment may be any one of the prior art that is applied to the sofa mounting frame 2 for work energy, and the sofa support may be formed by cooperating with the leg stretching assemblies 1.

In this embodiment, the hinge point of the first extension link 15 and the main ottoman link 14 is a fifth hinge point 196, and the hinge point of the sub-ottoman link 17 and the main ottoman link 14 is a fourth hinge point 195; the second, fifth and fourth pivot points 194, 196, 195 are not collinear. The hinge point of the first driving link 11 and the second extension link 13 is a sixth hinge point 192. As shown in fig. 1, 2, 3, 8 and 10 in detail, the first extension link 15, the second extension link 13, the main footrest link 14 and the support link 12 constitute a first planar four-bar mechanism capable of performing posture adjustment from fig. 2 to 3 in the case where the first driving link 11 applies an external force to the second extension link 13, more specifically, as shown in fig. 8 to 10 (from the accommodated state to the extended state) or fig. 10 to 8 (from the extended state to the accommodated state), thereby achieving posture adjustment of the functional sofa for the user. When the leg stretching assembly 1 is in a storage state, the main foot stool connecting rod 14 can provide upward supporting force for the feet or the shanks of a user when the leg stretching assembly 1 is adjusted to be in a stretching state by the user, and therefore the purpose of relieving fatigue of the lower limbs of the user is achieved.

In this embodiment, the first extension link 15 and the second extension link 13 are a set of opposite sides of the first planar four-bar mechanism, and the first extension link 15 is located at the inner side of the second extension link 13, where the second extension link 13 is widened to shield the outer side of the first extension link 15, so that the posture adjustment trajectory of the first planar four-bar mechanism is not changed, the upper edge of the rod segment of the first extension link located between the second hinge point 194 and the third hinge point 193 coincides with the second extension link 13 in the axial direction of the rotation shaft of the first driving link 11, that is, when the outer side of the second extension link 13 is viewed along the axial direction of the rotation shaft of the first driving link 11 toward the first extension link 15 (toward the inner side as shown in fig. 8), the upper edge of the main rod segment can be shielded by the second extension link 13. Further, it is possible to prevent the gap between the first extension link 15 and the second extension link 13 from causing a pinching injury to the user during the posture adjustment of the leg stretching assembly 1. It should be noted here that the area of the main pole segment is not fixed, but varies with the movement of the leg stretching assembly 1. The second extension link 13 is used as a member of the leg stretching assembly 1, and on one hand, the second extension link plays a role in structural support and connection, and on the other hand, the second extension link plays a role in safety protection, and a specific anti-pinch component is not required to be added, so that the structure of the sofa support is simplified while the safety is ensured.

Further, in the present embodiment, as shown in fig. 1, 2 and 3, the main ottoman link 14, the second driving link 16, the first extension link 15 and the sub-ottoman link 17 constitute a second planar four-bar mechanism, which is connected in series with the first planar four-bar mechanism. When first plane four-bar linkage carries out attitude adjustment, second plane four-bar linkage carries out attitude adjustment thereupon, accessible vice footstool connecting rod 17 supplements main footstool connecting rod 14 on structure space, make after shank extension subassembly 1 accomodates under the basically unchangeable condition of distance between the ground, shank extension subassembly 1 can provide bigger support area for user's foot or shank under the extension state, can make the function sofa of using this sofa support adapt to the user between the more general type when the support effect is good, namely user's cover face is wider.

As shown in fig. 2, 4, 8 and 10, the second extension link 13 includes a lower working section 132 and an upper working section 131 connected to each other, the lower working section 132 being connected to the first drive link 11, and the upper working section 131 being connected to the main footrest link 14; a first transition round angle 133 is arranged at the joint of the lower working section 132 and the upper working section 131, and the first transition round angle 133 is distributed at one side close to the first hinge point 191; the first transition rounded corner 133 is convexly disposed toward the first hinge point 191. In this embodiment, the upper working segment 131 and the lower working segment 132 are integrally formed, and the third hinge point 193 and the sixth hinge point 192 are both disposed on the lower working segment 132. After assembly, no matter the sofa support is in a storage state or an extension state, the structural center of the upper working section 131 is always higher than that of the lower working section 132, so that the leg extension assembly 1 always keeps one end of the main footrest connecting rod 14 tilted upwards no matter the sofa support is in the storage state or the extension state, and the structural design can ensure that the main footrest connecting rod 14 can make the feet or the lower legs of a user too high as possible when the sofa support is in the extension state, so that the blood circulation of the lower limbs of the user is promoted to achieve the purpose of relaxing; on the other hand is when sofa support is in the state of accomodating, and the front end upwarps makes the space between its and the ground big for shank extends 1, and convenience of customers carries out the health clearance to shank and extends 1 below.

In this embodiment, as shown in fig. 2, 3 and 4, the first transition rounded corner 133 is used to block the first hinge point 191. Specifically, in the first planar four-bar linkage posture adjustment process, first hinge point 191 makes circular motion around third hinge point 193, first transition fillet 133 structural design herein and first hinge point 191 movement track basic adaptation can shelter from it in first hinge point 191 motion process, can satisfy the effect that shelters from the width of first extension connecting rod 15 on the basis of reducing second extension connecting rod 13 as far as possible, can reduce leg and extend subassembly 1 volume when saving second extension connecting rod 13 manufacturing cost, increase the height between leg and extend subassembly 1 and the ground, convenience of customers cleans the health.

In this embodiment, the second extension link 13 is provided with a limit protrusion 18; the support link 12 is provided with a receiving gap 122 and an extending gap 121 which are matched with the limit bulge 18; when the first driving link 11 rotates, the receiving notch 122 is used to engage the limiting protrusion 18 to make the leg stretching assembly 1 in the receiving state, and the extending notch 121 is used to engage the limiting protrusion 18 to make the leg stretching assembly 1 in the extending state. As shown in fig. 1, 2, 4 and 7, the extending notch 121 and the receiving notch 122 are both used to cooperate with the position-limiting protrusion 18, specifically, as shown in fig. 2, during the movement of the first driving link 11 rotating the leg-extending assembly 1, the supporting link 12 and the second extending link 13 rotate relatively around the third hinge point 193, and when the supporting link 12 rotates clockwise around the third hinge point 193 relative to the second extending link 13 until the extending notch 121 is snapped into the position-limiting protrusion 18, the extending assembly is kept in the extending state; and when the support link 12 rotates counterclockwise relative to the second extension link 13 about the third hinge point 193 until the receiving notch 122 is snapped into the limiting protrusion 18, the extension assembly maintains the receiving state. In this embodiment, the position-limiting protrusions 18 are distributed between the third hinge point 193 and the sixth hinge point 192; the receiving notch 122 and the extending notch 121 are both provided toward the limit projection 18.

As shown in fig. 2 and 3, the main ottoman link 14 is provided with a first mounting surface 141, and the sub-ottoman link 17 is provided with a second mounting surface 171; when the leg stretching assembly 1 is in the storage state, a first included angle α is formed between the first assembling surface 141 and the second assembling surface 171, and the first included angle α is 85-95 degrees; when the leg stretching assembly 1 is in the stretching state, the first assembling surface 141 and the second assembling surface 171 form a second included angle β, and the second included angle β is 0 ° to 10 °. In this embodiment, preferably, when the leg stretching assembly 1 is in the storage state, the first included angle α is 90 °; the second angle beta is 0 deg. when the leg stretching assembly 1 is in the stretched state. As shown in fig. 3 and 8, when the leg stretching assembly 1, i.e. the sofa support, is in the storage state, the first assembling surface 141 is substantially perpendicular to the ground, and the second assembling surface 171 is substantially parallel to the ground. The arrangement makes the leg stretching component 1 compact and small in occupied space. As shown in fig. 2 and 10, when the leg stretching assembly 1, i.e. the sofa support, is in the stretching state, the first mounting surface 141 and the second mounting surface 171 are substantially parallel and are disposed toward the same side, so that the second mounting surface 171 can functionally and well expand the supporting area of the first mounting surface 141, increase the supporting area of the leg stretching assembly 1, and is beneficial to improving the comfort of the leg stretching assembly 1.

As shown in fig. 5 and 6, in the present embodiment, the first extension link 15 includes a front working section 153, a middle working section 152 and a rear working section 151 which are connected in sequence, wherein: the rear working section 151 is connected to the support link 12; the junction of the rear working section 151 and the middle working section 152 is provided with a second rounded transition corner 154, the second rounded transition corner 154 being disposed convexly away from the first hinge point 191. Here, the front working section 153, the middle working section 152 and the rear working section 151 are integrally formed. The rear working section 151 and the middle working section 152 are arranged at an included angle, the upper edge of the rod section between the first hinge point 191 and the second hinge point 194 of the rear working section can be closer to the upper edge of the second extension connecting rod 13 on the premise of not changing the action of the first extension connecting rod 15, the structure is compact, the second extension connecting rod 13 can conveniently shield the first extension connecting rod 15, a gap is prevented from being formed between the lower edge of the second extension connecting rod 13 and the upper edge of the first extension connecting rod 15, the function of preventing a user from being injured by clamping can be achieved, and the safety is high. The second transition radius 154 formed at the junction of the rear working section 151 and the middle working section 152 can reduce stress concentration at the junction, and has high structural strength.

In this embodiment, the front working segment 153 includes a working portion 1532 and a transition portion 1531 connected to each other, the transition portion 1531 is connected to the middle working segment 152, and the working portion 1532 is connected to the second drive link 16; the working portion 1532 is parallel to and non-coplanar with the middle working segment 152. Specifically, as shown in figures 1, 5 and 6, the parallel and non-coplanar configuration of the working portion 1532 and the middle working segment 152 facilitates articulation of the working portion 1532 with the second drive link 16.

In this embodiment, a hinge point between the support link 12 and the mounting bracket 2 is a seventh hinge point 197, a rotating shaft when the first driving link 11 rotates around the hinge point with the mounting bracket 2 is defined as a reference shaft, and a plane perpendicular to the reference shaft is defined as a reference plane; the distance between the projection point of the first hinge point 191 in the reference plane and the projection point of the seventh hinge point 197 in the reference plane is D1, D1=200-240mm. In this embodiment, D1=215.53mm is preferable. Specifically, as shown in fig. 7, a third hinge hole 123 and a fourth hinge hole 124 are respectively disposed on the support link 12, wherein the seventh hinge point 197 is located on a central axis of the third hinge hole 123, the first hinge point 191 is located on a central axis of the fourth hinge hole 124, and the central axes of the third hinge hole 123 and the fourth hinge hole 124 are both parallel to the reference axis. D1 is the distance between the central axis of the third hinge hole 123 and the central axis of the fourth hinge hole 124. The length of D1 is limited, so that the leg stretching assembly 1 is ensured to be opened in a stretching state, and meanwhile, the leg stretching assembly can be ensured not to interfere with the ground in the storage process.

Further, the mounting frame 2 comprises a seat frame 21 and an adjusting assembly for adjusting the seat frame 21, wherein: the adjusting assembly comprises a fixed base plate 201, a rotary driving plate 202 and an adjusting mechanism which are oppositely arranged, and the rotary driving plate 202 is adjustably connected to the fixed base plate 201 through the adjusting mechanism; the rotary drive plate 202 is adjustably connected to the seat frame 21 by at least two first links 22, the first links 22 being hinged at a first end to the seat frame 21 and at the other end to the rotary drive plate 202. Here the seat frame 21 and the rotary drive plate 202 are hinged by two first links 22 to form a planar four-bar mechanism as shown in figure 11. In use, the fixed base plate 201 is fixed to the ground, and the posture of the seat frame 21 is adjusted by driving the rotary drive plate 202 to adjust the posture of the planar four-bar mechanism including the seat frame 21, the rotary drive plate 202, and the first link 22.

In the present embodiment, as shown in fig. 13, the first link 22 is provided with a fifth hinge hole 221 and a sixth hinge hole 222, a hinge point of the first link 22 and the seat frame 21 is an eighth hinge point, a hinge point of the first link 22 and the rotation driving plate 202 is a ninth hinge point, a distance between a projection point of the eighth hinge point in the reference plane and a projection point of the ninth hinge point in the reference plane is D2, and D2=110-150mm. In this embodiment, D2=125.5mm is preferable. The height of the sofa or the seat can reach 430-500mm when the sofa support is applied to the sofa or the seat. In this embodiment, the eighth hinge point is located on the central axis of the fifth hinge hole 221, the ninth hinge point is located on the central axis of the sixth hinge hole 222, and the central axes of the fifth hinge hole 221 and the sixth hinge hole 222 are both parallel to the reference axis. D2 is the distance between the central axis of the fifth hinge hole 221 and the central axis of the sixth hinge hole 222.

Further, as shown in fig. 10 to 12, the adjusting mechanism includes a second link 23, a third link 24, a fourth link 25, a fifth link 26, a sixth link 27, a seventh link 28, and an eighth link 29, wherein: the second connecting piece 23 is provided with a first hinge hole 231 and a second hinge hole, the second connecting piece 23 is hinged to the rotary driving plate 202 through the first hinge hole 231, the second connecting piece 23 is hinged to the third connecting piece 24 through the second hinge hole, and the second hinge hole is positioned between two end parts of the third connecting piece 24; a first end of the third connecting member 24 is hinged to the fixed base plate 201, and a second end is hinged to a first end of the fourth connecting member 25; the second end of the fourth connecting element 25 is hinged to the fifth connecting element 26, and the hinged point of the second connecting element and the fifth connecting element is between the two ends of the fifth connecting element 26; a first end of the fifth connecting element 26 is hinged to the second connecting element 23, the hinge point of the first connecting element and the second connecting element is located between the first hinge hole 231 and the second hinge hole, and a second end of the fifth connecting element 26 is hinged to a first end of the sixth connecting element 27; a second end of the sixth connection member 27 is hinged to the fixed base plate 201; a first end of the seventh link 28 is hinged to the sixth link 27 with a hinge point between two ends of the sixth link 27, and a second end of the seventh link 28 is hinged to the rotary driving plate 202; the eighth link 29 is hinged at a first end to the rotary drive plate 202 and at a second end to the first drive link 11.

In this embodiment, the front end (the end close to the leg extension assembly 1) of the rotary drive plate 202 is adjustably attached to the front end (the end close to the leg extension assembly 1) of the fixed base plate 201 by the seventh connecting member 28 and the sixth connecting member 27, the rear end (the end opposite to the front end) of the rotary drive plate 202 is adjustably attached to the rear end (the end opposite to the front end) of the fixed base plate 201 by the second connecting member 23 and the third connecting member 24, and the posture of the seat frame 21 can be adjusted when the rotary drive plate 202 rotates by engaging with the first connecting member 22, the fourth connecting member 25, the fifth connecting member 26, and the eighth connecting member 29. Specifically, the rotary driving plate 202 drives forward, the adjusting mechanism drives the seat frame 21, so that the front end (the end close to the leg extension assembly 1) of the seat frame 21 is raised relative to the ground, and the rear end of the seat frame 21 is lowered relative to the ground, so that the sofa support is adjusted to be in a lying position, and at this time, the leg extension assembly 1 is in an extended state, so that a user can realize a zero-gravity lying position; in contrast, when the rotary driving plate 202 is driven reversely, the adjusting mechanism drives the seat frame 21, so that the front end (the end close to the leg extension assembly 1) of the seat frame 21 is lowered relative to the ground, and the rear end of the seat frame 21 is raised relative to the ground, so that the sofa support is adjusted to the sitting position, and at this time, the leg extension assembly 1 is in the storage state, so that the user can realize the normal sitting position.

In this embodiment, the seat frame 21 is provided with a backrest component 3 for providing a support for the back of the user, so as to better realize the posture adjustment of the sofa support. Specifically, the backrest component 3 includes a backrest connecting block 31, a backrest limiting block 32, a backrest limiting rod 33, and a ninth connecting member 35, the backrest connecting block 31 is hinged to the backrest limiting block 32, one end of the ninth connecting member 35 is hinged between two end points of the backrest connecting block 31, the other end is hinged to the backrest limiting rod 33, a limiting column 331 is arranged on the backrest limiting rod 33, and a limiting surface 321 matched with the limiting column 331 is arranged on the backrest limiting block 32; the backrest stopper 32 is fixedly connected to the seat frame 21. Further, the backrest module 3 further includes a tenth connecting member 34, a first end of the tenth connecting member 34 is hinged to the fixed base plate 201, and a hinge point of the tenth connecting member and the fixed base plate is a tenth hinge point; the second end of the tenth connecting piece 34 is hinged to one end, far away from the backrest connecting block 31, of the backrest limiting rod 33, and the hinged point of the tenth connecting piece and the backrest limiting rod is an eleventh hinged point; the distance between the projection point of the tenth hinge point in the reference plane and the projection point of the eleventh hinge point in the reference plane is D3, and D3=65-100mm. In this embodiment, preferably, D3=74.18mm. As shown in fig. 11 and 14, a seventh hinge hole 341 and an eighth hinge hole 342 are respectively formed in the ninth connector 35, the tenth hinge point is located on the central axis of the eighth hinge hole 342, the eleventh hinge point is located on the central axis of the seventh hinge hole 341, the central axes of the eighth hinge hole 342 and the seventh hinge hole 341 are both parallel to the reference axis, and D3 is a distance between the central axis of the eighth hinge hole 342 and the central axis of the seventh hinge hole 341.

As shown in fig. 11, in this embodiment, the backrest limiting block 32 is bifurcated, and has two end portions, i.e., an upper end and a lower end, one end of the backrest connecting block 31 is hinged to the upper end of the backrest limiting block 32, and the lower end of the backrest limiting block 32 is hinged between two end points of the backrest limiting rod 33. When the sofa support is used, when the sofa support is adjusted to a lying posture (zero gravity) state as shown in fig. 17 from a sitting posture, the height of the rear end of the seat frame 21 is reduced relative to the ground, so that the upper end of the backrest limit block 32 installed at the rear end of the seat frame 21 is raised relative to the ground, the lower end of the backrest limit block 32 is lowered relative to the ground, the backrest connecting block 31 is driven to rotate clockwise around the upper end of the backrest limit block 32, the backrest connecting block 31 is driven to rotate counterclockwise around the lower end of the backrest limit block 32 by the backrest limiting rod 33 through the ninth connecting piece 35 until the limiting column 331 abuts against the limiting surface 321, the upper half of the body of a user can realize a lower lying posture, and the zero gravity lying posture is better realized. The embodiment also provides a seat unit which comprises the sofa support. The seat unit can be used for a functional sofa, can provide support for feet or legs of a user, can provide a zero-gravity lying posture for the user through posture adjustment, and is convenient to use.

Specifically, as shown in fig. 15 and 16, two parallel and linked sofa supports are installed in the seat unit, and the two sofa supports are linked at least through a front installation pipe 42 and a rear installation pipe 41. Specifically, one end of the front mounting tube 42 is connected to the first driving link 11 of one of the sofa supports, the other end is connected to the first driving link 11 of the other sofa support (not shown in the figure), and likewise, one end of the rear mounting tube 41 is connected to the fixing base plate 201 of one of the sofa supports, and the other end is connected to the fixing base plate 201 of the other sofa support. A first driving member 4 is provided between the front mounting tube 42 and the rear mounting tube 41 for providing a driving force to the first driving link 11. The first driver 4 here may be an electric push rod.

In this embodiment, the distance from the lowest point of the rear mounting tube 41 to the ground is D4, and D4=30-60mm. Preferably, D4=45.6mm.

As shown in fig. 12, in the present embodiment, the fixing base plate 201 is provided with a rear mounting hole, and the height of the center of the rear mounting hole from the ground is 60-100mm. Preferably, the height of the center of the rear mounting hole from the ground is 85mm.

The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by combining the above technical features at will. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims (16)

1. A sofa support comprising a leg stretching assembly (1) and a mounting frame (2) connected to each other, characterised in that the leg stretching assembly (1) comprises a first drive link (11) and a support link (12) articulated to the mounting frame (2); further comprising a first extension link (15), a second extension link (13), a main ottoman link (14), an auxiliary ottoman link (17) and a second drive link (16), wherein:

one end of the first extension link (15) is hinged to the free end of the support link (12) at a first hinge point (191), the other end of the first extension link (15) is hinged to the second drive link (16), and the first extension link (15) is hinged to the main footrest link (14); one end of the auxiliary footrest connecting rod (17) is hinged to the main footrest connecting rod (14), and the free end of the second driving connecting rod (16) is hinged to the auxiliary footrest connecting rod (17);

one end of the second extension connecting rod (13) is hinged to the main foot stool connecting rod (14), the hinged point is a second hinged point (194), and the other end of the second extension connecting rod (13) is hinged to the free end of the first driving connecting rod (11);

the second extending connecting rod (13) and the supporting connecting rod (12) are hinged between two end points of the second extending connecting rod and the supporting connecting rod, and the hinged point is a third hinged point (193);

when the first driving connecting rod (11) rotates around a hinge point of the first driving connecting rod and the mounting frame (2), a rod section, which is defined between the second hinge point (194) and the third hinge point (193), of the first extension connecting rod (15) is a main rod section, and when the first extension connecting rod (15) is axially towards the outer side of the second extension connecting rod (13) along the rotating shaft of the first driving connecting rod (11), the upper edge of the main rod section can be shielded by the second extension connecting rod (13).

2. The sofa support according to claim 1, characterized in that the hinging point of the first extension link (15) and the main footrest link (14) is a fifth hinging point (196), the hinging point of the secondary footrest link (17) and the main footrest link (14) is a fourth hinging point (195);

the second hinge point (194), the fifth hinge point (196) and the fourth hinge point (195) are non-collinear.

3. The sofa support according to claim 2, wherein the second extension link (13) is provided with a stop protrusion (18);

the support connecting rod (12) is provided with a containing notch (122) and an extending notch (121) which are matched with the limiting protrusion (18);

when the first driving connecting rod (11) rotates, the containing notch (122) is used for limiting the limiting protrusion (18) to enable the leg stretching assembly (1) to be in a containing state, and the extending notch (121) is used for limiting the limiting protrusion (18) to enable the leg stretching assembly (1) to be in an extending state.

4. The sofa support according to claim 3, characterised in that said main footrest link (14) is equipped with a first assembling surface (141) and said auxiliary footrest link (17) is equipped with a second assembling surface (171);

when the leg stretching assembly (1) is in the storage state, a first included angle (alpha) is formed between the first assembling surface (141) and the second assembling surface (171);

when the leg stretching assembly (1) is in the stretching state, a second included angle (beta) is formed between the first assembling surface (141) and the second assembling surface (171).

5. The sofa support according to claim 3, wherein the hinge point of the first driving link (11) and the second extending link (13) is a sixth hinge point (192), and the limiting protrusion (18) is distributed between the third hinge point (193) and the sixth hinge point (192);

the accommodating notch (122) and the extending notch (121) are both arranged towards the limiting protrusion (18).

6. The sofa support according to claim 5, characterized in that the second extension link (13) comprises a lower working segment (132) and an upper working segment (131) connected to each other, the lower working segment (132) being connected to the first driving link (11), the upper working segment (131) being connected to the main footrest link (14);

a first transition round angle (133) is configured at the joint of the lower working section (132) and the upper working section (131), and the first transition round angle (133) is distributed on one side close to the first hinge point (191);

the first transition rounded corner (133) is convexly disposed toward the first hinge point (191).

7. The sofa support according to claim 6, wherein the third hinge point (193) and the sixth hinge point (192) are both located at the lower work segment (132).

8. The sofa support according to claim 1, wherein the first extension link (15) comprises a front working section (153), a middle working section (152) and a rear working section (151) connected in series, wherein:

the rear working section (151) is connected to the support link (12);

and a second transition round angle (154) is arranged at the joint of the rear working section (151) and the middle working section (152), and the second transition round angle (154) is arranged in a protruding way back to the first hinge point (191).

9. The sofa support according to claim 8, wherein the front working section (153) includes a working portion (1532) and a transition portion (1531) connected to each other, the transition portion (1531) being connected to the middle working section (152), the working portion (1532) being connected to the second drive link (16);

the working portion (1532) is parallel to and non-coplanar with the mid-working section (152).

10. The sofa support according to any of the claims 1-9, characterised in that the hinge point between the support link (12) and the mounting frame (2) is a seventh hinge point (197);

a rotating shaft when the first driving connecting rod (11) rotates around a hinge point of the first driving connecting rod and the mounting frame (2) is defined as a reference shaft, and a plane perpendicular to the reference shaft is a reference surface;

the distance between the projection point of the first hinge point (191) in the reference plane and the projection point of the seventh hinge point (197) in the reference plane is 200-240mm.

11. The sofa support according to claim 10, wherein the mounting frame (2) comprises a seat frame (21) and an adjustment assembly for adjusting the seat frame (21), wherein:

the adjusting assembly comprises a fixed base plate (201), a rotary driving plate (202) and an adjusting mechanism which are oppositely arranged, and the rotary driving plate (202) is adjustably connected to the fixed base plate (201) through the adjusting mechanism;

the rotary drive plate (202) is adjustably connected to the seat frame (21) by at least two first connectors (22), the first connectors (22) being hinged at a first end to the seat frame (21) and at the other end to the rotary drive plate (202).

12. The sofa support according to claim 11, wherein the hinge point of the first connector (22) to the seat frame (21) is an eighth hinge point, and the hinge point of the first connector (22) to the rotary driving plate (202) is a ninth hinge point;

the distance between the projection point of the eighth hinge point in the reference plane and the projection point of the ninth hinge point on the same first connecting piece (22) as the eighth hinge point in the reference plane is 110-150mm.

13. The sofa support according to claim 11 or 12, wherein the adjustment mechanism comprises a second connector (23), a third connector (24), a fourth connector (25), a fifth connector (26), a sixth connector (27), a seventh connector (28) and an eighth connector (29), wherein:

the second connecting piece (23) is provided with a first hinge hole (231) and a second hinge hole, the second connecting piece (23) is hinged to the rotary driving plate (202) through the first hinge hole (231), the second connecting piece (23) is hinged to the third connecting piece (24) through the second hinge hole, and the second hinge hole is located between two end parts of the third connecting piece (24);

the first end of the third connecting piece (24) is hinged to the fixed base plate (201), and the second end of the third connecting piece is hinged to the first end of the fourth connecting piece (25);

the second end of the fourth connecting piece (25) is hinged to the fifth connecting piece (26), and the hinged point of the second connecting piece and the fifth connecting piece is positioned between the two ends of the fifth connecting piece (26);

a first end of the fifth connecting piece (26) is hinged to the second connecting piece (23), the hinged point of the first connecting piece and the second connecting piece is located between the first hinged hole (231) and the second hinged hole, and a second end of the fifth connecting piece (26) is hinged to a first end of the sixth connecting piece (27);

a second end of the sixth connecting member (27) is hinged to the fixed base plate (201);

a first end of the seventh link (28) is hinged to the sixth link (27) with a hinge point between two ends of the sixth link (27), and a second end of the seventh link (28) is hinged to the rotary drive plate (202);

the eighth link (29) is hinged at a first end to the rotary drive plate (202) and at a second end to the first drive link (11).

14. The sofa support according to claim 11, wherein the seat frame (21) is provided with a backrest assembly (3), the backrest assembly (3) comprises a backrest connecting block (31), a backrest limiting block (32), a backrest limiting rod (33) and a ninth connecting member (35), the backrest connecting block (31) is hinged to the backrest limiting block (32), one end of the ninth connecting member (35) is hinged between two end points of the backrest connecting block (31), the other end of the ninth connecting member is hinged to the backrest limiting rod (33), the backrest limiting rod (33) is provided with a limiting column (331), and the backrest limiting block (32) is provided with a limiting surface (321) matched with the limiting column (331);

the backrest limiting block (32) is fixedly connected to the seat frame (21).

15. The sofa support according to claim 14, wherein the backrest module (3) further comprises a tenth connector (34), the first end of the tenth connector (34) is hinged to the fixed base plate (201), and the hinged point is a tenth hinge point;

the second end of the tenth connecting piece (34) is hinged to one end, away from the backrest connecting block (31), of the backrest limiting rod (33), and the hinged point of the tenth connecting piece and the backrest limiting rod is an eleventh hinged point;

the distance between the projection point of the tenth hinge point in the reference plane and the projection point of the eleventh hinge point in the reference plane is 65-100mm.

16. A seating unit characterized by: comprising a sofa support according to any one of claims 1-15.

Images