CN213464433U - Chair and swing tray thereof - Google Patents

Abstract

The utility model discloses a chair and a swing tray thereof, comprising a first base, a second base and a third base, wherein the third base is fixedly connected with a seat support supporting rod, the first base is fixedly connected with a seat, the second base is positioned above the third base and movably connected with the third base, and the first base is positioned above the second base and movably connected with the second base; the second base swings relative to the third base along the X direction, the first base swings relative to the second base along the Y direction, and the X direction and the Y direction are mutually vertical; according to the technical scheme, the first swing mechanism capable of swinging left and right is added on the original second swing mechanism capable of tilting back and forth, and the added first swing mechanism does not interfere with the internal structure of the second swing mechanism, namely the first swing mechanism in the embodiment can be suitable for any tray capable of tilting back and forth, and has universality and simple structure.

Description

Chair and swing tray thereof

Technical Field

The utility model relates to a technical field of chair especially relates to a chair and tray sways thereof.

Background

Many existing chairs (e.g., office chairs) have their back and forth rotatable to different angles relative to the chassis to improve comfort of use.

In order to realize the functions, the seat capable of inclining mainly depends on the tray of the fixed seat base and the rotation connecting structure and the locking mechanism between the chair back fixing frame of the fixed seat back to realize the functions of lying down the chair back and adjusting the inclination angle of the chair back, and the spring part can be installed on the rotating shaft of the chair back fixing frame generally, and generates certain rebound force in the rotating process of the chair back, thereby enabling the user to support the back in a certain way in the lying process, and after the locking mechanism is loosened, the spring part can also enable the chair back to automatically recover to the initial state.

However, the swivel chair tray can only realize the lifting of the cushion, the adjustment of the inclination angle of the backrest and the like, and has single function. Physiologically, a person feels uncomfortable or tired after sitting still for a long time, and various diseases such as hypomnesis, headache, dizziness, lumbar vertebra, cervical vertebra and the like are caused due to insufficient blood supply to the brain, the weight of the whole body is pressed on the bottom of the vertebra and the like, so that the health is not good. When working or studying, people can not swing left and right greatly when sitting but can only lean forward or backward to relieve due to the limitation of the function of the prior chair; the problem of fatigue of people in long-time sitting can not be fundamentally relieved only by leaning and leaning, so that a chair which can lead people to swing left and right to move bodies when sitting is needed.

Thus, the patent application numbers are: the' 201910582221.7 patent discloses a swingable office chair, this left-right rocking mechanism that office chair set up is including the rubber spare that is located base shell afterbody both sides, the left-right rocking reset rubber spare that is located chassis upper surface rear portion, be located the rubber axle sleeve of chassis upper surface front end, the fixed setting on the connecting seat of left-right rocking reset rubber spare, the middle part position of connecting seat is provided with the screw rod, the connecting seat welding sets up on the chassis, the control switch sways, the lower extreme fixed connection of arc is connected with the base shell to the other end of rubber spare, the lower surface of base shell corresponds two left-right rocking reset rubber spare and gets the position and be provided with the screw rod perforation, the position department that the lower surface of base shell corresponds the rubber axle sleeve is provided with the spacing hole of rubber axle sleeve, the screw rod passes fixing base and screw rod perforation and rubber axle sleeve in proper order and pegs graft and sets.

When the backrest is specifically applied, a user applies force in any left and right directions, the screw rod and the rubber shaft sleeve are stressed to rotate, the base assembly is driven to incline to one side, the rubber part on one side and the left and right swinging reset rubber part are compressed, and the base assembly resets under the action of the other rubber part and the left and right swinging reset rubber part, so that the base assembly can swing left and right, the base assembly drives the chassis connecting piece to synchronously move through the two rubber parts in the process of swinging left and right, and finally the chassis connecting piece realizes the function of swinging left and right of the backrest under the action of the universal joint; although the seat can swing left and right, the seat is provided with a large number of rubber pieces and a complex linkage mechanism, installation is complex, universality is insufficient, and large-scale mass production is difficult to realize.

Thus, chinese patent publication No. CN110710815A discloses a dynamic pallet, comprising: a first base; the second base is connected with the first base in a left-right rotating mode; one end of the first crank is hinged with the first base; the other end of the first crank is hinged with an elastic transfer connecting piece, and the elastic transfer connecting piece is used for connecting the seat supporting piece; the two ends of the second crank are respectively hinged with the second base and the bearing piece, the bearing piece is rigid and is used for connecting the base supporting piece, and the bearing piece is positioned at the upper end of the second base; the rocker is configured to be connected with the chair back component and is connected with the second crank into a whole; the elastic resetting device is used for enabling the rocker to pry the second crank to move and then enabling the second crank to recover the original position; the utility model is constructed by adopting the four-bar linkage principle, has the functions of lifting the chair seat and swinging left and right, can automatically adapt to the sitting posture change of leaning forward and backward and swinging left and right of the user when the connecting chair is configured, solves the defect caused by long-time sitting, and meets the requirements of different people; the dynamic tray, although somewhat simplified in construction and no longer using rubber members, is still relatively complex in construction.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to overcome the disadvantages of the prior art, and to provide a chair and a swing tray thereof, wherein the swing tray can swing left and right and can tilt back and forth, and is simple in structure and universal.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a swing tray is characterized by comprising a first base, a second base and a third base, wherein the third base is fixedly connected with a seat support rod, the first base is fixedly connected with a seat, the second base is positioned above the third base and movably connected with the third base, and the first base is positioned above the second base and movably connected with the second base;

the second base swings relative to the third base along the X direction, the first base swings relative to the second base along the Y direction, and the X direction and the Y direction are perpendicular to each other.

Preferably, the spring assembly comprises two first spring assemblies and a first connecting shaft, the first connecting shaft is distributed along the X direction, the first connecting shaft is fixedly connected with the first base and rotatably mounted on the second base, the two first spring assemblies are respectively located on two opposite sides of the first connecting shaft, one end of each first spring assembly is connected with the first base, and the other end of each first spring assembly is connected with the second base.

Preferably, the first spring assembly comprises a first connecting piece, a spring and a second connecting piece, the first connecting piece is rotatably installed on the first base, the second connecting piece is rotatably installed on the second base, the first connecting piece and the second connecting piece are close to or far away from each other through cooperation, and the spring is sleeved on part of the first connecting piece and part of the second connecting piece.

Preferably, the first connecting piece includes a first shaft portion and a second shaft portion that are perpendicular to each other, the second connecting piece includes a third shaft portion and a fourth shaft portion that are perpendicular to each other, the first shaft portion is rotatably installed on the first base, the fourth shaft portion is rotatably installed on the second base, the second shaft portion and the third shaft portion are coaxially distributed, the third shaft portion is slidably sleeved on the second shaft portion, the spring sleeve is installed on the second shaft portion and the third shaft portion, and two ends of the spring respectively abut against the first shaft portion and the fourth shaft portion.

Preferably, the first shaft parts, the fourth shaft parts and the first connecting shaft are distributed in parallel, the distance difference between the first connecting shaft and the two first shaft parts is not more than cm, and the distance difference between the first connecting shaft and the two fourth shaft parts is not more than 1 cm;

wherein, when the first base is in a horizontal state, a distance between the first connecting shaft and the first shaft portion in a horizontal direction is greater than a distance between the first connecting shaft and the fourth shaft portion.

Preferably, the shaft is further provided with a limiting groove, a first mounting hole and a bolt, wherein the limiting groove and the first mounting hole are respectively located on the second shaft part and the third shaft part, and the bolt is inserted and installed in the first mounting hole and slides in the limiting groove.

Preferably, the spring plate is fixedly connected with the pressing block, and two ends of the spring plate are respectively pressed on the front second connecting shaft and the rear second connecting shaft.

Preferably, the left side surface and the right side surface of the second base are respectively provided with a first arc-shaped long hole and a second arc-shaped long hole, and the second connecting shaft is fixedly connected with the third base; or the left side surface and the right side surface of the third base are respectively provided with a first arc-shaped long hole and a second arc-shaped long hole, and the second connecting shaft is fixedly connected with the second base;

the first arc-shaped long hole and the second arc-shaped long hole are symmetrically distributed at the front half section and the rear half section of the second base or the third base, two ends of one second connecting shaft are arranged in the first arc-shaped long hole and can move along the first arc-shaped long hole, and two ends of the other second connecting shaft are arranged in the second arc-shaped long hole and can move along the second arc-shaped long hole.

Preferably, the spring piece is fixedly installed on the pressing block through a fastener, and the distance difference between the fastener and the front and rear second connecting shafts is not more than 1 cm.

A chair comprising a rocking tray as described above.

The utility model has the advantages that: the first swing mechanism capable of swinging left and right is added on the original second swing mechanism capable of tilting back and forth, and the added first swing mechanism does not interfere with the internal structure of the second swing mechanism, namely the first swing mechanism in the embodiment can be applied to any tray capable of tilting back and forth, and has universality and simple structure.

Drawings

Fig. 1 is a schematic structural view of the swing tray of the present invention;

fig. 2 is an exploded view of the swing tray of the present invention;

fig. 3 is an exploded view of the first spring assembly of the present invention.

Reference numerals: 1. a first base; 2. a first connecting shaft; 3. a first connecting member; 4. a spring; 5. a second connecting member; 30. a first shaft portion; 31. a second shaft portion; 50. a third shaft portion; 51. a fourth shaft portion; 52. a limiting groove; 32. a first mounting hole; 6. a second base; 7. a third base; 8. a second connecting shaft; 9. a spring plate; 10. briquetting; 60. a first arc-shaped long hole; 61. the second arc-shaped long hole.

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 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 exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present 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 or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed 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," and "fixed" are to be construed broadly and may, 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. 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.

The first embodiment is as follows:

in this embodiment, as shown in fig. 1 and 2, a swing tray includes a second swing mechanism swinging along an X direction and a first swing mechanism swinging along a Y direction, the X direction and the Y direction are perpendicular to each other, the second swing mechanism is fixedly connected to a seat support rod, and the first swing mechanism is mounted above the second swing mechanism and is fixedly connected to a seat, wherein the X direction is a front-back direction, and the Y direction is a left-right direction.

In other embodiments, the X direction may also be a left-right direction, the Y direction is a front-back direction, that is, a second swing mechanism swinging left and right is fixedly connected to the seat support rod, and a first swing mechanism swinging back and forth is fixedly connected to the seat.

In this embodiment, first swing mechanism includes a first base 1, two first spring unit and a first connecting axle 2, first base 1 and seat support fixed connection, two first spring unit distribute respectively in both ends about first base 1, first spring unit one end is connected and the other end is connected with second swing mechanism with first base 1, first connecting axle 2 and 1 fixed connection of first base, first connecting axle 2 distributes and rotatable the installing on second swing mechanism along the fore-and-aft direction, but first base 1 is installed on second swing mechanism through 2 horizontal hunting of first connecting axle.

The arrangement is equivalent to adding a first swing mechanism capable of swinging left and right on the original second swing mechanism capable of tilting back and forth, and the added first swing mechanism does not interfere with the internal structure of the second swing mechanism, namely, the first swing mechanism in the embodiment can be applied to any tray capable of tilting back and forth, and has universality and simple structure.

In this embodiment, as shown in fig. 3, the first spring assembly includes a first connecting member 3, a spring 4 and a second connecting member 5, the first connecting member 3 includes a first shaft portion 30 and a second shaft portion 31 perpendicular to each other, the second connecting member 5 includes a third shaft portion 50 and a fourth shaft portion 51 perpendicular to each other, the first shaft portion 30 is rotatably mounted on the first base 1, the fourth shaft portion 51 is rotatably mounted on the second swing mechanism, the second shaft portion 31 and the third shaft portion 50 are coaxially distributed, and the third shaft portion 50 is slidably mounted on the second shaft portion 31, the spring 4 is mounted on the second shaft portion 31 and the third shaft portion 50 in a sleeved manner, and two ends of the spring 4 respectively abut against the first shaft portion 30 and the fourth shaft portion 51. So set up, first connecting piece 3 and the rotatable connection of first base 1, second connecting piece 5 and second wabbler mechanism rotatable coupling, first connecting piece 3 and the cooperation of second connecting piece 5 form a scalable piece, just so can make first spring assembly provide certain elastic force when swaing, have improved the compliance of swaing, and when not swaing, first spring assembly makes first base 1 reset.

In the embodiment, the first shaft portions 30, the fourth shaft portions 51 and the first connecting shaft 2 are distributed in parallel, the distance difference between the first connecting shaft 2 and two first shaft portions 30 is not more than 1cm, and the distance difference between the first connecting shaft 2 and two fourth shaft portions 51 is not more than 1 cm; further preferably, the first connecting shaft 2 and the two first shaft portions 30 are equidistant from each other, and the first connecting shaft 2 and the two fourth shaft portions 51 are equidistant from each other. This arrangement is provided to ensure that the amplitude and the degree of difficulty of the leftward and rightward swinging of the first base 1 are kept as uniform as possible when the first base is reciprocated about the first connecting shaft 2 as the rotation center axis, thereby improving the comfort of people during use.

In the present embodiment, when the first base 1 is in the horizontal state, the distance in the horizontal direction between the first connecting shaft 2 and the first shaft portion 30 is larger than the distance between the first connecting shaft 2 and the fourth shaft portion 51; this is provided to prevent the first spring assembly from colliding with the second rocking mechanism during the side-to-side rocking of the first base 1.

In this embodiment, a plug is further provided, a limit groove 52 is provided on the third shaft portion 50, a first mounting hole 32 is provided on the second shaft portion 31, and the plug is inserted into the first mounting hole 32 and slides in the limit groove 52; this is provided in order to limit the maximum amplitude of the left-right swing of the first base 1.

In other embodiments, the limiting groove 52 may be located on the second shaft portion 31, and the corresponding first mounting hole 32 is located on the third shaft portion 50.

In this embodiment, the second swing mechanism includes a second base 6 and a third base 7, the second base 6 and the third base 7 are movably connected through a front second connecting shaft 8 and a rear second connecting shaft 8, the second base 6 is located above the third base 7 and is movably connected with the first base 1, the third base 7 is fixedly connected with the seat support rod, the second base 6 is provided with a press block 10 and two spring pieces 9, the press block 10 is fixedly connected with the second base 6, the spring pieces 9 are fixedly connected with the press block 10, and two ends of the spring pieces 9 are respectively pressed on the front second connecting shaft 8 and the rear second connecting shaft 8; according to the arrangement, the third base 7 is fixed, the second base 6 swings forwards and backwards relative to the third base 7, the first base 1 swings leftwards and rightwards relative to the second base 6, and then the swing tray can swing forwards, backwards, leftwards, rightwards, leftwards and rightwards, and is simple in structure and low in cost.

In this embodiment, the left and right side surfaces of the second base 6 are respectively provided with a first arc-shaped long hole 60 and a second arc-shaped long hole 61, and the second connecting shaft 8 is fixedly connected with the third base 7; or, a first arc-shaped long hole 60 and a second arc-shaped long hole 61 are respectively arranged on the left side surface and the right side surface of the third base 7, and the second connecting shaft 8 is fixedly connected with the second base 6;

the first arc-shaped long hole 60 and the second arc-shaped long hole 61 are symmetrically distributed at the front half section and the rear half section of the second pedestal 6 or the third pedestal 7, two ends of one second connecting shaft 8 are arranged in the first arc-shaped long hole 60 and can move along the first arc-shaped long hole 60, and two ends of the other second connecting shaft 8 are arranged in the second arc-shaped long hole 61 and can move along the second arc-shaped long hole 61.

In this embodiment, the spring piece 9 is fixedly mounted on the pressing block 10 by a fastening member, and the distance difference between the fastening member and the front and rear second connecting shafts 8 is not more than 1cm, and further preferably, the distance between the fastening member and the front and rear second connecting shafts 8 is equal. The arrangement is to make the amplitude and the difficulty degree of the second pedestal 6 swing forwards and backwards consistent as much as possible, so as to improve the comfort of people in use.

Further preferably, the pressing block 10 is provided with a rounded corner at a portion contacting with the spring piece 9.

In the present embodiment, the fourth shaft portion 51 of the second link 5 is rotatably mounted on the side surface of the second base 6, and the first link shaft 2 is rotatably mounted on the upper end surface of the second base 6.

A chair comprising a rocking tray as described above.

Example two:

the difference between this embodiment and the first embodiment is that the structure of the second swing mechanism is different.

The specific structure of the second swing mechanism can refer to the structure of the tray with forward and backward tilting disclosed in publication nos. CN207898260U, CN206612438U, CN103169283B, CN209825886U, CN209377130U, CN209360111U, CN209073846U, CN106889799A, and CN205053405U, and generally, the tray capable of swinging left, right, and forward and backward can be formed only by movably connecting the base fixedly connected with the seat in the original structure and the first swing mechanism in the first embodiment.

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, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles 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 (10)

1. A swing tray is characterized by comprising a first base (1), a second base (6) and a third base (7), wherein the third base (7) is fixedly connected with a seat support rod, the first base (1) is fixedly connected with a seat, the second base (6) is positioned above the third base (7) and movably connected with the third base (7), and the first base (1) is positioned above the second base (6) and movably connected with the second base (6);

the second base (6) swings relative to the third base (7) along the X direction, the first base (1) swings relative to the second base (6) along the Y direction, and the X direction and the Y direction are perpendicular to each other.

2. A rocking tray as claimed in claim 1, wherein two first spring assemblies and a first connecting shaft (2) are provided, the first connecting shaft (2) being distributed in the X-direction, the first connecting shaft (2) being fixedly connected to the first base (1) and rotatably mounted on the second base (6), the two first spring assemblies being located on opposite sides of the first connecting shaft (2), respectively, the first spring assemblies being connected at one end to the first base (1) and at the other end to the second base (6).

3. The swing tray according to claim 2, wherein the first spring assembly comprises a first connecting member (3), a spring (4) and a second connecting member (5), the first connecting member (3) is rotatably mounted on the first base (1), the second connecting member (5) is rotatably mounted on the second base (6), the first connecting member (3) and the second connecting member (5) are matched to enable the first connecting member and the second connecting member to approach or separate from each other, and the spring (4) is sleeved on part of the first connecting member (3) and part of the second connecting member (5).

4. The swing tray as claimed in claim 3, wherein the first connecting member (3) comprises a first shaft portion (30) and a second shaft portion (31) perpendicular to each other, the second connecting member (5) comprises a third shaft portion (50) and a fourth shaft portion (51) perpendicular to each other, the first shaft portion (30) is rotatably mounted on the first base (1), the fourth shaft portion (51) is rotatably mounted on the second base (6), the second shaft portion (31) and the third shaft portion (50) are coaxially distributed, the third shaft portion (50) is slidably sleeved on the second shaft portion (31), the spring (4) is sleeved on the second shaft portion (31) and the third shaft portion (50), and two ends of the spring (4) are respectively abutted against the first shaft portion (30) and the fourth shaft portion (51).

5. A rocking tray as claimed in claim 4, characterised in that the first (30), fourth (51) and first connecting shafts (2) are arranged in parallel, the difference in distance between the first connecting shaft (2) and the two first shaft parts (30) being not more than 1cm, the difference in distance between the first connecting shaft (2) and the two fourth shaft parts (51) being not more than 1 cm;

wherein, when the first base (1) is in a horizontal state, a distance in a horizontal direction between the first connecting shaft (2) and the first shaft portion (30) is larger than a distance between the first connecting shaft (2) and the fourth shaft portion (51).

6. The swing tray as claimed in claim 4, further comprising a limiting groove (52), a first mounting hole (32) and a bolt, wherein the limiting groove (52) and the first mounting hole (32) are respectively located on the second shaft portion (31) and the third shaft portion (50), and the bolt is inserted and mounted in the first mounting hole (32) and slides in the limiting groove (52).

7. The swing tray as claimed in claim 1, further comprising a front second connecting shaft (8), a rear second connecting shaft (8), a left spring (9), a right spring (9), and a pressing block (10), wherein the pressing block (10) is fixedly connected to the second base (6), the spring (9) is fixedly connected to the pressing block (10), and two ends of the spring (9) are respectively pressed on the front second connecting shaft (8) and the rear second connecting shaft (8).

8. The swing tray as claimed in claim 7, wherein the left and right side surfaces of the second base (6) are respectively provided with a first arc-shaped long hole (60) and a second arc-shaped long hole (61), and the second connecting shaft (8) is fixedly connected with the third base (7); or the left side surface and the right side surface of the third base (7) are respectively provided with a first arc-shaped long hole (60) and a second arc-shaped long hole (61), and the second connecting shaft (8) is fixedly connected with the second base (6);

the first arc-shaped long hole (60) and the second arc-shaped long hole (61) are symmetrically distributed at the front half section and the rear half section of the second base (6) or the third base (7), two ends of one second connecting shaft (8) are arranged in the first arc-shaped long hole (60) and can move along the first arc-shaped long hole (60), and two ends of the other second connecting shaft (8) are arranged in the second arc-shaped long hole (61) and can move along the second arc-shaped long hole (61).

9. The rocking tray of claim 7, wherein the spring plate (9) is fixedly mounted on the pressing block (10) by means of a fastening member, and the distance difference between the fastening member and the front and rear second connecting shafts (8) is not more than 1 cm.

10. A chair comprising a rocking tray according to any one of claims 1 to 9.

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