CN111616536A

CN111616536A - Chair and rocking chair leg thereof

Info

Publication number: CN111616536A
Application number: CN202010377949.9A
Authority: CN
Inventors: 王江林; 王郑兴; 鲍家华
Original assignee: Henglin Home Furnishings Co Ltd
Current assignee: Henglin Home Furnishings Co Ltd
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2020-09-04

Abstract

The invention discloses a chair and a swinging chair leg thereof, comprising a chair leg seat for fixing a chair seat supporting rod, wherein a plurality of extension arms are distributed around the chair leg seat, the outer ends of the extension arms are contacted with the ground, the extension arms are fixedly connected or integrally formed, a connecting arm is arranged between each extension arm and the chair leg seat, the inner end of each connecting arm is movably connected with the chair leg seat, and the outer end of each connecting arm is movably connected with the corresponding extension arm; the connecting arm is also provided with an elastic element for promoting the inner end of the connecting arm to move upwards relative to the outer end of the connecting arm, so that the elastic elements of the plurality of extending arms jointly act to promote the bottom of the chair foot seat to leave the ground; when the bottom of the chair foot seat contacts the ground, the elastic element of at least one extending arm causes the included angle between the extending arm and the connecting arm to be reduced; according to the technical scheme, the horizontal rotation and the sliding of the chair can be realized, the swing function of the chair can be realized, meanwhile, the original structural design of the chair does not need to be changed, and the universality is high.

Description

Chair and rocking chair leg thereof

Technical Field

The invention belongs to the field of seats, and particularly relates to a chair and a rocking chair leg thereof.

Background

The chair is common furniture in the market at present, and most of the chairs have the function of adjusting the sitting height, namely the height of the chair seat is adjusted through an air rod; in addition, if the swivel chair is used as a common office chair, horizontal rotation and sliding can be realized. In addition, many office workers or students can sit on the seat in most of the day, so that the seat is provided with a swinging function, and the rest of the personnel in the work is facilitated.

The prior office chair (swivel chair) adopts a tilting chassis to realize the function of swinging in front and back amplitude. For example, a swivel chair base with adjustable forward inclination is disclosed in the patent document of chinese utility model with publication number "CN 206252158U", and is used for mounting a swivel chair support rod through a swivel chair rod hole on the base plate seat. An intermediate plate is arranged above the chassis base in a matched manner through a tilting rotating shaft; the tilting rotating shaft is hinged with the vertical wall of the middle plate and the vertical wall of the base plate seat; a forward-inclined plate is installed above the middle plate in a matched mode through a forward-inclined bottom rotating shaft or a forward-inclined middle rotating shaft; the forward-inclined bottom rotating shaft is hinged with a forward-inclined plate vertical wall of the forward-inclined plate and a base plate vertical wall of the base plate seat; the forward-inclined middle rotating shaft is hinged with a forward-inclined plate vertical wall of the forward-inclined plate and a middle plate vertical wall of the middle plate. The base of the swivel chair and the chair back can be simultaneously matched and inclined forwards to fit the back, waist and whole pelvis of a rider, so that the swivel chair better conforms to the human engineering; the rider feels more comfortable. However, the above-mentioned solutions only enable the seat to swing in the front-back direction by tilting the chassis, but do not have the function of swinging in the left-right direction or any angle direction.

Thus, chinese patent publication No. CN201798301U discloses a universal rocking chair, wherein a seat, a backrest, and armrests are connected by fasteners, and are connected to an upper connecting member at the upper end of a supporting spring by fasteners under the seat, the seat is adjustable forward and backward relative to the upper connecting member, and the upper connecting member is fixedly connected to the supporting spring; the lower part of the supporting spring is fixed on a footing connecting plate through a fastener, the footing connecting plate is fixedly connected with the footing, a foot pad is arranged below the footing end, and one footing end is also provided with a wheel shaft and a caster wheel which can assist in moving. Due to the action of the supporting spring, the upper part of the chair can swing in a universal way, so that people can use the chair for leisure and fitness.

And chinese patent publication No. CN110742430A discloses a dynamic seat, comprising: a first base; the second base rotates left and right relative to the first base; a seat support configured to support a human body to sit; one end of the first crank is hinged with the first base; the other end of the first crank is rotatably connected with the seat supporting piece, and the rotary connection part of the first crank and the seat supporting piece is flexible; two ends of the second crank are respectively hinged with the second base and the seat supporting piece; the rocker is configured to be connected with the chair back component and is connected with the second crank into a whole; the first crank, the base support piece, the second crank, the first base and the second base form a four-bar linkage; when the seat supporting piece and the second base rotate around the first base left and right together, the rotary connection part of the first crank and the seat supporting piece deforms under the action of the torsional force transmitted by the seat supporting piece, and restores to the initial state when the torsional force disappears. The user can swing left and right or lean forward and backward to meet different postures of the user.

Although the latter two chairs achieve multi-directional swinging compared with the first chair, the latter two chairs do not solve a common phenomenon of swinging chairs: in order to increase the rocking function of the seat, in particular to make the seat rocking in all directions, it is common to structurally modify the existing well-performing seat or seat support structure, but the resulting mechanical solution is not only relatively complex, but also expensive to manufacture, and often the seat or seat support structure is inferior to the previous one due to the additional necessary components and the space required.

Disclosure of Invention

The invention aims to provide a chair and a rocking chair leg thereof, which can realize the horizontal rotation and sliding of the chair and the rocking function of the chair, and simultaneously, the original structural design of the chair is not required to be changed, and the universality is strong.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a sway chair foot, is including the chair foot seat that is used for fixed seat support bracing piece, and the distribution of chair foot seat has many cantilever arms all around, and the outer end contact ground of cantilever arm, its characterized in that:

the plurality of the extension arms are fixedly connected or integrally formed, a connecting arm is arranged between each extension arm and the corresponding chair foot seat, the inner end of each connecting arm is movably connected with the corresponding chair foot seat, and the outer end of each connecting arm is movably connected with the corresponding extension arm;

the connecting arm is also provided with an elastic element for promoting the inner end of the connecting arm to move upwards relative to the outer end of the connecting arm, so that the elastic elements of the plurality of extending arms jointly act to promote the bottom of the chair foot seat to leave the ground; when the bottom of the chair foot seat contacts the ground, the elastic element of at least one extending arm causes the included angle between the extending arm and the connecting arm to be reduced.

Preferably, there are 4 to 6 projecting arm assemblies evenly distributed around the seat base.

Preferably, the elastic element is a compression spring or a torsion spring.

Preferably, the outer end of each projecting arm is provided with a roller.

Preferably, the extension arm is further provided with a first limiting groove, the inner end of the connecting arm is hinged to the chair foot seat, the outer end of the connecting arm is provided with a first sliding shaft, and the first sliding shaft moves in the first limiting groove.

Preferably, the elastic element comprises a telescopic rod and a pressure spring, the inner end of the telescopic rod is connected with the extension arm, the outer end of the telescopic rod is connected with the first sliding shaft, the pressure spring is sleeved on the telescopic rod, and two ends of the pressure spring respectively abut against two ends of the telescopic rod.

Preferably, the elastic element is a torsion spring, the torsion spring is sleeved on the inner end of the connecting arm and the hinged shaft of the chair foot seat, one action end of the torsion spring is abutted against the connecting arm, and the other action end of the torsion spring is abutted against the chair foot seat.

Preferably, the chair foot seat is further provided with a second limiting groove, a second sliding shaft is mounted at the inner end of the connecting arm, the second sliding shaft moves in the second limiting groove, and the outer end of the connecting arm is hinged to the extending arm.

Preferably, the lower end surface of the leg seat is convex.

A chair comprises the rocking chair leg.

The invention has the beneficial effects that:

1) for common chairs on the market, the function of all-directional swinging can be realized only by replacing the chair legs, the original supporting structure of the chair does not need to be changed, the chair is convenient and quick, and the cost is low.

2) The chair foot seat of the invention can move, but the movement is limited by the connecting arm, generally speaking, the movement of the chair foot seat comprises the lifting in the vertical direction and the inclination relative to the horizontal plane, namely the inclination relative to the ground; more specifically, when the chair is not loaded or a person is not seated, the chair foot seat is at a certain distance from the ground under the action of the extending arms and the elastic elements, the lower end surface of the chair foot seat is opposite to the ground, when the chair is loaded in the vertical direction, the chair foot seat descends or the chair foot seat descends to the ground, and when the chair is loaded in the horizontal direction, the chair foot seat tilts in the corresponding horizontal direction, namely swings are formed.

3) A projecting arm mounted on the chair foot seat, usually fixed together with the roller; the chair is easy to generate accidental movement due to the rollers, and the phenomenon is more obvious for the chair in a swinging state, and the accidental movement has certain risk even though the displacement is small, namely, a user can fall down or even be injured due to the accidental movement of the chair, the risk is more prominent when the user is old people or children, and the user can be disturbed due to the accidental movement when the user is sitting; the scheme of the invention can avoid accidental rolling of the chair: when the chair foot seat is descended to the ground, the static friction force generated on the chair foot seat by the gravity can avoid the accidental rolling of the chair device because the user applies the gravity on the chair; the static friction force is larger than the rolling friction force required by rolling; in this way, a safe seat or bench can be provided in a simple manner; this is attractive to the elderly; meanwhile, the chair can also be well applied to working occasions; since in the work situation an accidental movement of the seat arrangement disturbs the work, but it cannot be dispensed with because of the need to roll.

4) The chair leg seat is movably arranged on the extension arms through a plurality of connecting arms; the support of the whole chair is commonly maintained by a plurality of extension arms, and because the extension arms are fixedly connected or integrally formed with each other, the load born by each extension arm is the same and uniform; in the swinging process of the chair, due to different swinging directions, the load borne by each connecting arm is different, but after each connecting arm bearing different loads acts on the extending arm, the load borne by each extending arm is still uniform, and the stability of the chair in the swinging process is further ensured.

Drawings

FIG. 1 is a schematic structural diagram of a rocking chair leg according to a first embodiment of the present invention 1;

FIG. 2 is a schematic structural diagram of a rocking chair leg according to a first embodiment of the invention 2;

FIG. 3 is an enlarged view of a portion of FIG. 2 at Q;

FIG. 4 is a schematic structural view of a rocking chair leg according to a second embodiment of the present invention 1;

FIG. 5 is a schematic structural view of a rocking chair leg according to a second embodiment of the invention 2;

fig. 6 is a partial enlarged view of fig. 5 at P.

Description of reference numerals: 1. a chair foot seat; 2. a reach arm; 3. a connecting arm; 30. an inner end of the connecting arm; 31. the outer end of the connecting arm; 20. a first limit groove; 4. a pressure spring; 5. a torsion spring; 21. an annular portion; 10. the lower end surface of the chair foot seat; 6. and a roller.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the present invention, for convenience of description, the six directions "up", "down", "inside", "outside", "left", "right", and the like are based on the state of a single cantilever arm in use; wherein; the inner end of the extending arm is closer to the chair foot seat than the outer end of the extending arm, the left side of the extending arm refers to the left hand side of the extending arm from outside to inside, the right side of the extending arm refers to the right hand side of the extending arm from outside to inside, and the upper and lower are the upper and lower in the normal sense.

The first embodiment is as follows:

a chair comprising a rocking chair leg as shown in figures 1-3; the seat cushion comprises a seat cushion support rod, a seat cushion and a backrest, wherein the seat cushion is fixedly arranged on the seat cushion support rod, the backrest is arranged on the seat cushion, the backrest can be fixedly connected with the seat cushion and can also swing back and forth relative to the seat cushion to form a deck chair, and the seat cushion support rod can be a common rod or a telescopic air rod; the rocking chair leg comprises a chair leg seat 1 for fixing a chair seat supporting rod, a plurality of extending arms 2 are distributed around the chair leg seat 1, and the outer ends of the extending arms 2 are contacted with the ground;

in the embodiment, a plurality of extension arms 2 are fixedly connected or integrally formed, a connecting arm 3 is arranged between each extension arm 2 and the corresponding chair foot seat 1, the inner end of the connecting arm 3 is movably connected with the chair foot seat 1, and the outer end of the connecting arm 3 is movably connected with the extension arms 2;

the connecting arm 3 is also provided with an elastic element for promoting the inner end of the connecting arm 3 to move upwards relative to the outer end thereof, so that the elastic elements of the plurality of extending arms 2 jointly promote the bottom of the chair foot seat 1 to leave the ground; when the bottom of the chair foot seat 1 contacts the ground, the elastic element of at least one extending arm 2 causes the included angle between the extending arm 2 and the connecting arm 3 to be reduced.

With the arrangement, for common chairs in the market, the function of all-directional swinging can be realized only by replacing the chair legs, the original support structure of the chair is not required to be changed, the chair is convenient and quick, and the cost is low;

meanwhile, the foot stool 1 of the present invention is movable, but its movement is limited by the assembly of the extension arm 2, and generally, the movement of the foot stool 1 includes elevation in the vertical direction and inclination with respect to the horizontal plane, that is, inclination with respect to the ground; more specifically, when there is no load or no person on the chair, the foot rest 1 is spaced from the ground and the lower end surface thereof is opposite to the ground under the action of the assembly of the extension arms 2 and the elastic element, when there is a load in the vertical direction on the chair, the foot rest 1 is lowered or the foot rest 1 is lowered to the ground, and when there is a load in the horizontal direction on the chair, the foot rest 1 is tilted in the corresponding horizontal direction, i.e. it swings.

In the embodiment, 4 to 6 extending arm 2 assemblies are uniformly distributed along the periphery of the chair foot seat 1; the lower end surface of the chair foot seat 1 is convex; further preferably, the lower end surface of the seat base 1 may be a spherical surface, a circular table surface, or another convex surface, and the shape of the bottom surface of the rocking chair disclosed in CN210095162U may be referred to, so that the chair can still rock when the seat base 1 is landed.

More preferably, 5 extending arm 2 assemblies are uniformly distributed along the periphery of the chair foot seat 1.

In this embodiment, the outer end of each projecting arm 2 is provided with a roller 6; so set up: when the seat base 1 is lowered to the ground, the static friction force generated on the seat base 1 by the gravity can avoid the accidental rolling of the seat device because the user applies the gravity on the seat; the static friction force is larger than the rolling friction force required by rolling; in this way, a safe seat or bench can be provided in a simple manner; this is attractive to the elderly; meanwhile, the chair can also be well applied to working occasions; since in the work situation an accidental movement of the seat arrangement disturbs the work, but it cannot be dispensed with because of the need to roll.

In addition, even if the chair foot seat 1 is continuously inclined towards different directions, the rollers 6 on the components of the plurality of extension arms 2 can still be always positioned on the ground, namely, the descending and the inclination of the chair foot seat 1 can be converted into the small-range movement of the rollers 6 in the horizontal direction through the four-bar linkage; the stability of the chair during rocking can still be ensured.

Preferably, the extension arm 2 is further provided with a first limiting groove 20, the inner end of the connecting arm 3 is hinged to the chair foot seat 1, the outer end of the connecting arm 3 is provided with a first sliding shaft, and the first sliding shaft moves in the first limiting groove 20.

In this embodiment, the first limiting groove 20 is further disposed on the projecting arm 2, the first limiting groove 20 can be disposed on any one of the left and right side surfaces of the projecting arm 2, the inner end of the connecting arm 3 is hinged to the leg base 1, the outer end of the connecting arm 3 is rotatably mounted with a first sliding shaft, and the first sliding shaft can move in the first limiting groove 20. This is provided for ensuring that the connecting arm 3 has a starting position and a maximum rotatable position, and can be rotated from the starting position to the maximum rotatable position and returned to the starting position; when the connecting arm 3 is located at the initial position, the chair foot seat 1 is not in contact with the ground, and when the connecting arm 3 is located at the maximum rotatable position, the chair foot seat 1 is in contact with the ground and inclines.

It is worth mentioning that it is also feasible to provide the second limiting groove on the seat base 1 instead of the first limiting groove 20 on the cantilever arm 2, i.e. the inner end of the connecting arm 3 is rotatably mounted with a second sliding shaft, which is movable in the second limiting groove, while the outer end of the connecting arm 3 is hinged with the cantilever arm 2.

In this embodiment, the elastic element selects a pressure spring 4, and is further preferred, the elastic element further includes a telescopic link, the inner end of the telescopic link is connected with the extension arm 2, the outer end of the telescopic link is connected with the first sliding shaft, the pressure spring 4 is sleeved on the telescopic link, and two ends of the pressure spring 4 are respectively abutted to two ends of the telescopic link.

Example two:

the difference between the present embodiment and the first embodiment is: the elastic element is a torsion spring 5.

In this embodiment, as shown in fig. 4-6, the torsion spring 5 is sleeved on the inner end of the connecting arm 3 and the hinge shaft of the foot seat 1, one acting end of the torsion spring 5 abuts against the connecting arm 3, and the other acting end of the torsion spring 5 abuts against the foot seat 1.

The specific states of the rocking chair legs in the first embodiment and the second embodiment are as follows:

when the chair surface does not bear load, the lower end surface 10 of the chair foot seat has a certain distance from the ground when the connecting arm 3 is positioned at the initial position; the distance is generally between 1cm and 20cm, preferably between 1cm and 10 cm; and the first sliding shaft will abut against the outer end of the first limit groove 20;

when the chair surface bears uniform load, the chair foot seat 1 can move along the vertical direction and can not incline like the horizontal direction, when the load is large enough, the chair foot seat 1 can vertically descend to the ground, and all the connecting arms 3 can move in the same way, especially in the same movement path, and at the moment, the connecting arms 3 are not limited by the first limiting grooves 20;

when uneven load is borne on the seat surface, the chair foot seat 1 moves downwards and has inclination in the horizontal direction, and when the load is large enough, the chair foot seat 1 can descend to the ground and incline until the first sliding shaft abuts against the inner end of the first limiting groove 20; in this process, the movement path of each connecting arm 3 is different; and the outer end 31 of at least one connecting arm moves in the opposite direction to the outer ends 31 of the other connecting arms; or the inner end 30 of at least one link arm moves in the opposite direction to the inner ends 30 of the other link arms; for example, when the outer end 31 of one connecting arm is moved inwardly, then the outer end 31 of at least one of the other connecting arms 3 is moved outwardly.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a sway chair foot, is including being used for chair foot seat (1) of fixed seat support bracing piece, and the distribution all around of chair foot seat (1) has many cantilever arms (2), and the outer end contact ground of cantilever arm (2), its characterized in that:

the plurality of the extension arms (2) are fixedly connected or integrally formed, a connecting arm (3) is arranged between each extension arm (2) and each chair foot seat (1), the inner end of each connecting arm (3) is movably connected with each chair foot seat (1), and the outer end of each connecting arm (3) is movably connected with each extension arm (2);

the connecting arm (3) is also provided with an elastic element for promoting the inner end of the connecting arm (3) to move upwards relative to the outer end of the connecting arm, so that the elastic elements of the extending arms (2) jointly act to promote the bottom of the chair foot seat (1) to leave the ground.

2. A rocking chair foot as claimed in claim 1, characterised in that the outer end of each projecting arm (2) is fitted with a roller (6).

3. The rocking chair foot according to claim 1, characterised in that the resilient element is a compression spring (4) or a torsion spring (5).

4. The rocking chair leg as claimed in claim 1, wherein 3 to 8 projecting arm assemblies are evenly distributed around the chair leg base (1); when the bottom of the chair foot seat (1) contacts the ground, the elastic element of at least one extending arm causes the included angle between the extending arm and the connecting arm (3) to be reduced.

5. A rocking chair leg as claimed in claim 4, characterised in that the projecting arm (2) is provided with a first stop groove (20), the inner end (30) of the connecting arm being pivotally connected to the chair leg (1), and the outer end (31) of the connecting arm being provided with a first sliding axle which moves in the first stop groove (20).

6. The rocking chair leg as claimed in claim 5, wherein the elastic element comprises a telescopic rod and a compression spring (4), the inner end of the telescopic rod is connected with the extension arm (2), the outer end of the telescopic rod is connected with the first sliding shaft, the compression spring (4) is sleeved on the telescopic rod, and two ends of the compression spring respectively abut against two ends of the telescopic rod.

7. The rocking chair leg as claimed in claim 1, wherein the resilient member is a torsion spring (5), the torsion spring (5) is fitted around the inner end (30) of the connecting arm and the hinge axis of the chair leg (1), one end of the torsion spring (5) abuts against the connecting arm (3), and the other end of the torsion spring (5) abuts against the chair leg (1).

8. A rocking chair leg as claimed in claim 1, characterised in that the seat (1) is provided with a second stop groove, in which a second sliding axle is mounted at the inner end (30) of the connecting arm, the second sliding axle moving within the second stop groove, and the outer end (31) of the connecting arm being hinged to the projecting arm (2).

9. A rocking chair foot as claimed in claim 1, characterised in that the lower end surface (10) of the foot seat is convex.

10. A chair, characterized in that it comprises a rocking chair foot according to any one of claims 1-9.