CN112056840A

CN112056840A - Chair and self-loading tray thereof

Info

Publication number: CN112056840A
Application number: CN202010885721.0A
Authority: CN
Inventors: 王江林; 王郑兴; 李德才
Original assignee: Henglin Home Furnishings Co Ltd
Current assignee: Henglin Home Furnishings Co Ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2020-12-11
Anticipated expiration: 2040-08-28
Also published as: CN112056840B

Abstract

The invention discloses a chair and a self-loading tray thereof, comprising a fixed seat fixedly connected with a seat support supporting rod, a first base fixedly connected with a seat and a second base fixedly connected with a chair back, wherein the fixed seat is also provided with two first spring assemblies, a locking plate, a first connecting shaft and a second connecting shaft; when the tilting locking assembly is in a locking state through the technical scheme, the fixed seat, the first base and the second base form a stable three-link mechanism, so that the structure is simpler and more stable compared with the traditional tray adopting a four-link mechanism, and the cost is saved.

Description

Chair and self-loading tray thereof

Technical Field

The invention relates to the technical field of chairs, in particular to a chair and a self-loading tray 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 back adjusting mechanism of the swivel chair tray completely depends on the elastic force of the spring part to adjust the tilting, and for people with different weights, the required elastic force of the spring has larger difference, so that the product has no good universality.

Therefore, the existing tray is often made to adapt to people with different weights by adding an adjusting mechanism for adjusting the elasticity of the spring part, for example, the Chinese patent document with the publication number of CN202891180U discloses a swivel chair part, in particular to a swivel chair tray with an adjustable rolling shaft; the rack-type lifting device comprises a base, a middle seat and a rocker, wherein a first waist-shaped hole is formed in the rear end of the base, a second waist-shaped hole is formed in the middle of the base, the middle seat and the rocker are connected together in a penetrating manner through a first rolling shaft in the first waist-shaped hole, the base and the middle seat are connected together in a penetrating manner through a second rolling shaft in the second waist-shaped hole, a third waist-shaped hole is formed in the front end of the middle seat, the base and the middle seat are connected together in a penetrating manner through a third rolling shaft in the third waist-shaped hole, a first torsion spring is arranged on the first rolling shaft, a rack is connected to the first rolling shaft, more than 2 teeth are arranged on the rack, and a locking plate capable of; the technical problem that people with different weights can not use the same swivel chair tray by an adjusting mechanism of the swivel chair tray in the prior art is mainly solved.

And Chinese patent publication No. CN209733156U discloses an elasticity adjusting mechanism for a chair seat chassis, comprising a chassis base, a plurality of elastic sheets arranged along the front and back direction of the chassis are arranged on the chassis base, an adjusting mechanism is arranged below the elastic sheets, the adjusting mechanism comprises a sliding block capable of moving along the front and back direction of the chassis and a control handle for controlling the movement of the sliding block, a propping strip abutted against the lower end of the elastic sheet is arranged at the upper end of the sliding block, when the elasticity is required to be adjusted, the control handle only needs to rotate the control handle to drive the sliding block to move, the propping strip of the sliding block moves along the lower end of the elastic sheet and props against the elastic sheet, thereby the deformation range of the elastic sheet can be adjusted to adjust the elasticity, the elasticity adjusting mechanism replaces the traditional compression spring by the elastic sheet, the installation is simpler, only the elastic sheet needs to be placed on the chassis base for installation, the, the elastic piece has higher practicability, the elastic change of the elastic piece is more balanced, and the elastic adjusting effect is better.

However, in the using process, those skilled in the art find that the arrangement of the elastic force adjusting mechanism solves the technical problem that the tray has no universality for people with different weights, but the arrangement of the elastic force adjusting mechanism increases the complexity of the structure of the tray, and the elastic force adjusting mechanism also fails in the using process.

Disclosure of Invention

In order to solve the above problems, the present invention is directed to overcome the disadvantages of the prior art, and to provide a chair and a self-supporting tray thereof, which are not provided with an elastic force adjusting mechanism, can meet the needs of people with different weights, and have versatility.

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

a self-loading tray comprises a fixed seat fixedly connected with a seat support supporting rod, a first base fixedly connected with a seat and a second base fixedly connected with a seat back, wherein the fixed seat is also provided with two first spring assemblies, a locking plate, a first connecting shaft and a second connecting shaft, the first connecting shaft is positioned in front of the second connecting shaft, one end of the second base is hinged with the first base, the other end of the second base is hinged with the fixed seat, the first base is movably connected with the fixed seat through the first connecting shaft, the second connecting shaft is fixedly arranged on the fixed seat, the front end of the locking plate is rotatably arranged on the first connecting shaft, the rear end of the locking plate is movably connected with the second connecting shaft, the two first spring assemblies are respectively positioned at two sides of the locking plate, and the front end of the first spring assembly is movably connected with the first connecting shaft, the rear end of the first spring assembly is movably connected with the second connecting shaft.

Preferably, the left side and the right side of the fixed seat are respectively provided with an inclined first long hole, two ends of the first connecting shaft penetrate through the two first long holes and then are fixedly connected with the first base, and the first connecting shaft is in clearance fit with the first long holes;

the locking plate is provided with a second long hole, the locking plate is sleeved on the second connecting shaft through the second long hole, and the second connecting shaft is in clearance fit with the second long hole.

Further preferably, when the first connecting shaft moves from bottom to top in the first long hole, the first connecting shaft moves from front to back in the first long hole at the same time.

Preferably, the first base is hinged to the second base through a third connecting shaft, the second base is hinged to the fixing base through a fourth connecting shaft, and the third connecting shaft is located above and in front of the fourth connecting shaft.

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

Preferably, the locking device is further provided with an inclining and inclining locking assembly, the inclining and inclining locking assembly comprises an inclining and inclining pull wire, a first mounting seat and a lock tongue mounting seat, wherein the first mounting seat and the lock tongue mounting seat are mounted on a fixing seat, a second spring assembly which can move left and right is mounted on the first mounting seat, a lock tongue assembly which can move left and right is mounted on the lock tongue mounting seat, a plurality of locking portions are arranged on the locking plate, the second spring assembly can move left and right on the first mounting seat through tensioning and loosening the inclining and inclining pull wire, and the lock tongue assembly is driven to move left and right on the lock tongue mounting seat and then is matched.

Preferably, the second spring assembly comprises a third connecting piece and a second spring piece sleeved on the third connecting piece, a transverse first sliding hole is formed in the first mounting seat, the third connecting piece penetrates through the first sliding hole and can move left and right in the first sliding hole, a first blocking portion is arranged at one end of the third connecting piece, a second blocking portion is arranged at the other end of the third connecting piece, the first blocking portion and the second blocking portion are respectively located at the left end and the right end of the first sliding hole, one end of the second spring piece is abutted against the first blocking portion, the other end of the second spring piece is abutted against the first mounting seat, and the second blocking portion and the inclining pull line are movably matched.

Further preferably, at least one of the first blocking part and the second blocking part is detachably connected with the third connecting part.

Preferably, the device is further provided with a third blocking part, the second blocking part is provided with a first channel through which the tilting stay wire can only pass, and the inner end of the tilting stay wire passes through the first channel and then is fixedly connected with the third blocking part. Further preferably, the third blocking part is a sphere, a cylinder or other shapes; and the third blocking portion cannot pass through the first passage.

Preferably, the second blocking part is further provided with a second channel for the third blocking part to slide left and right, the second channel is communicated with the first channel, and when the third connecting piece slides to the side surface of one side of the second blocking part and abuts against the first mounting seat, part or all of the second channel is sealed by the first mounting seat.

Preferably, the bolt assembly comprises a bolt piece and an elastic piece, a transverse second sliding hole is formed in the bolt mounting seat, the bolt piece penetrates through the second sliding hole and can move left and right in the second sliding hole, one end of the elastic piece is fixedly connected with the bolt piece, and the other end of the elastic piece is fixedly connected with a third connecting piece; further preferably, the other end of the elastic member is fixedly mounted on the side surface of the other side of the second blocking portion.

Preferably, the plurality of locking portions at least comprise a first locking long hole and a second locking long hole which are distributed at intervals, the first locking long hole is positioned behind the second locking long hole, two ends of the first locking long hole and two ends of the second locking long hole point to the up-down direction, and the second locking long hole rotates anticlockwise by 1-20 degrees compared with the first locking long hole. Further preferably, the second long locking hole is rotated counterclockwise by 5 to 15 ° compared to the first long locking hole.

Further preferably, the plurality of locking portions further include locking notches, the locking notches are in the shape of a portion of the first locking long hole or the second locking long hole, and the locking notches are rotated by 1-20 ° counterclockwise compared with the second locking long hole. Further preferably, the second locking long hole is rotated counterclockwise by 5 to 15 ° compared to the second locking long hole.

Preferably, still be equipped with lift locking Assembly, act as go-between including going up and down, torsional spring, clamp plate and turn round, the one end and the torsional spring cooperation of clamp plate and rotatable installation on first mount pad, the rotatable installation on first mount pad of turning round, the one end that goes up and down to act as go-between is equipped with the fourth stop part, the one end that goes up and down to act as go-between is walked around the other end clearance fit through fourth stop part and clamp plate behind the turn round from the bottom of turning round.

Preferably, the bolt installing seat is further provided with a reinforcing plate, the reinforcing plate is installed on the fixing seat, and the first installing seat and the bolt installing seat are fixedly installed on the reinforcing plate.

A chair comprising a self-carrying tray as described above.

The invention has the beneficial effects that: when the tilting locking assembly is in a locking state, the fixed seat, the first base and the second base form a stable three-link mechanism, so that the structure is simpler and more stable compared with the traditional tray adopting a four-link mechanism, and the cost is saved;

when the tilting locking assembly is in a non-locking state, the tray is in a tilting state, the tilting power is mainly applied to the chair back from the back of people, the second base rotates backwards, the first base and the first connecting shaft are driven to move backwards and upwards, the locking plate is driven to rotate and move backwards, the locking plate moves backwards and can be subjected to resistance of the first spring piece, the tilting process becomes flexible, and meanwhile when people apply larger acting force to the chair back, the acting force applied to the chair seat can be correspondingly reduced, namely, the tray tilting cannot be influenced for people with different weights, and the tray tilting is also in accordance with the ordinary tilting habit of people.

Drawings

FIG. 1 is a schematic view of the self-supporting seat of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a first schematic view of the tilt lock assembly and lift lock assembly of the present invention;

FIG. 4 is a second schematic structural view of the tilt lock assembly and lift lock assembly of the present invention;

FIG. 5 is a third schematic structural view of the pitch lock assembly and the lift lock assembly of the present invention;

FIG. 6 is an exploded view of the tilt lock assembly of the present invention;

FIG. 7 is an exploded view of the first spring assembly of the present invention;

FIG. 8 is a schematic view of the structure of the locking plate;

FIG. 9 is a schematic structural view of the first mounting base;

fig. 10 is a schematic structural view of the third connecting member.

Description of reference numerals: 1. a fixed seat; 2. a first base; 3. a second base; 4. a locking plate; 10. a first connecting shaft; 11. a second connecting shaft; 5. a first spring assembly; 12. a first long hole; 13. a third connecting shaft; 14. a fourth connecting shaft; 50. a first spring member; 51. a first connecting member; 52. a second connecting member; 6. a tilt lock assembly; 60. inclining and facing up the stay wire; 61. a first mounting seat; 62. a bolt mounting seat; 63. a third connecting member; 64. a second spring member; 610. a first slide hole; 67. a first blocking portion; 630. a second blocking portion; 6300. a first channel; 600. a third barrier portion; 6301. a second channel; 65. a latch member; 66. an elastic member; 40. a first locking long hole; 41. a second locking long hole; 42. locking the notch; 43. a second long hole; 7. a lift lock assembly; 70. lifting a stay wire; 71. a torsion spring; 72. pressing a plate; 73. turning the head; 8. a reinforcing plate.

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, "up" and "down" are "up" and "down" in the normal sense, with the direction that a person sits on the chair facing the chair being the "front" direction, the back-to-back direction being the "rear" direction, the left hand being on the "left" side and the right hand being on the "right" side.

As shown in fig. 1 and 2, a self-loading tray comprises a fixing base 1 fixedly connected with a seat support supporting rod, a first base 2 fixedly connected with a seat support and a second base 3 fixedly connected with a chair back, wherein the fixing base 1 is further provided with two first spring assemblies 5, a locking plate 4, a first connecting shaft 10 and a second connecting shaft 11, the first connecting shaft 10 is positioned in front of the second connecting shaft 11, one end of the second base 3 is hinged with the first base 2, the other end of the second base 3 is hinged with the fixing base 1, the first base 2 is movably connected with the fixing base 1 through the first connecting shaft 10, the second connecting shaft 11 is fixedly arranged on the fixing base 1, the front end of the locking plate 4 is rotatably arranged on the first connecting shaft 10, the rear end of the locking plate 4 is movably connected with the second base 11, the two first spring assemblies 5 are respectively positioned at two sides of the locking plate 4, the front end of the first spring assembly 5 is movably connected with the first connecting shaft 10, and the rear end of the first spring assembly 5 is movably connected with the second connecting shaft 11.

So set up, when people's back applys the effort to the back of the chair, make second base 3 rotate backward, and then drive first base 2 and first connecting shaft 10 rebound backward, and then drive jam plate 4 and rotate and rebound, and jam plate 4 rebound can receive the resistance of first spring part 50, and then make the process of heeling up become gentle and agreeable, simultaneously when people applys bigger effort to the back of the chair, its effort that applys to the seat support also can corresponding reduction, to the people of different weights promptly, can not influence the tray and heels up, and this also accords with the usual habit of heeling up of people.

In this embodiment, the left and right sides of the fixing base 1 are respectively provided with an inclined first long hole 12, two ends of the first connecting shaft 10 penetrate through the two first long holes 12 and then are fixedly connected with the first base 2, and the first connecting shaft 10 is in clearance fit with the first long holes 12; the locking plate 4 is provided with a second long hole 43, the locking plate 4 is sleeved on the second connecting shaft 11 through the second long hole 43, and the second connecting shaft 11 is in clearance fit with the second long hole 43; further preferably, when the first connecting shaft 10 moves from bottom to top in the first long hole 12, the first connecting shaft 10 moves from front to back in the first long hole 12 at the same time; by arranging the inclined first long hole 12, a movable space is formed between the first base 2 and the second base 3, and the top end of the first long hole 12 is inclined backwards, so that the first base 2 can move backwards when the chair is tilted.

In this embodiment, first base 2 is articulated with second base 3 through third connecting axle 13, second base 3 is articulated with fixing base 1 through fourth connecting axle 14, third connecting axle 13 is located the top and the place ahead of fourth connecting axle 14, so sets up, at the in-process of inclining and pitching, the motion trail of the front end of first base 2 is backward ascending motion to the motion trail of the rear end of first base 2 also is backward ascending motion, first base 2 can keep a horizontally state at the in-process of inclining and pitching approximately like this, simultaneously, because first base 2 also can backward move and then form the seat back linkage with the back of the chair, when inclining and pitching promptly, can not produce relative motion between human back and the back of the chair, and then can not influence the orderliness of people's clothing yet.

In this embodiment, as shown in fig. 7, the first spring assembly 5 includes a first spring member 50, a first connecting member 51 and a second connecting member 52, the first connecting member 51 is rotatably mounted on the first connecting shaft 10, the second connecting member 52 is rotatably mounted on the second connecting shaft 11, the first spring member 50 is sleeved on a portion of the first connecting member 51 and a portion of the second connecting member 52, and the first connecting member 51 and the second connecting member 52 cooperate to form a telescopic member; further preferably, the first connecting member 51 includes a shaft portion, and the second connecting member 52 includes a sleeve portion, and the sleeve portion is mounted on the shaft portion in a sleeved manner to form a telescopic member.

In this embodiment, as shown in fig. 3 to 6, a tilting locking assembly 6 is further provided, which includes a tilting cable 60, a first mounting seat 61 and a latch bolt mounting seat 62, which are installed on the fixing seat 1 and are shown in fig. 9, a second spring assembly installed on the first mounting seat 61 and capable of moving left and right, and a latch bolt assembly installed on the latch bolt mounting seat 62 and capable of moving left and right, where a plurality of locking portions are provided on the lock plate 4, and the second spring assembly can move left and right on the first mounting seat 61 by tightening and loosening the tilting cable 60, and further drives the latch bolt assembly to move left and right on the latch bolt mounting seat 62 to cooperate with the plurality of locking portions to limit the lock plate 4 to rotate.

So set up, when the locking subassembly 6 that inclines and faces upward is in the locking state, fixing base 1, first base 2 and second base 3 form a firm three-bar linkage, and then compare in traditional tray that adopts four-bar linkage, the structure is simpler and firm, has also practiced thrift the cost simultaneously.

Further preferably, the first mounting seat 61 is located between the first connecting shaft 10 and the second connecting shaft 11 and below the lock plate 4; the space in the fixing base 1 is reasonably utilized, so that the parts in the supporting plate are highly centralized, and the occupied volume of the tray is effectively reduced.

In this embodiment, the second spring assembly includes a third connecting member 63 shown in fig. 10 and a second spring member 64 sleeved on the third connecting member 63, the first mounting seat 61 is provided with a transverse first sliding hole 610, the third connecting member 63 passes through the first sliding hole 610 and can move left and right in the first sliding hole 610, one end of the third connecting member 63 is provided with a first blocking portion 67, the other end of the third connecting member 63 is provided with a second blocking portion 630, the first blocking portion 67 and the second blocking portion 630 are respectively located at left and right ends of the first sliding hole 610, one end of the second spring member 64 abuts against the first blocking portion 67 and the other end of the second spring member 64 abuts against the first mounting seat 61, and the second blocking portion 630 is movably matched with the tilting pull wire 60. So set up, when the pulling is leaned on and act on the guy wire 60, drive third connecting piece 63 and outwards remove, first stopper 67 compresses second spring part 64, when unclamping and leaned on guy wire 60, third connecting piece 63 returns to initial position automatically under the effect of second spring part 64, fixes a position the initial position of third connecting piece 63 through the cooperation of second stopper 630 and first mount pad 61 simultaneously, and the setting of first sliding hole 610 makes third connecting piece 63 can only slide and can not carry out the removal of other directions by the side to side.

Further preferably, at least one of the first blocking portion 67 and the second blocking portion 630 is detachably connected to the third connecting member 63; this is provided to facilitate the mounting of the third connector 63 on the first mounting seat 61.

Further preferably, a third blocking portion 600 is further provided, a first passage 6300 through which only the tilting cord 60 can pass is provided on the second blocking portion 630, and the inner end of the tilting cord 60 passes through the first passage 6300 and then is fixedly connected to the third blocking portion 600. Further preferably, the third blocking portion 600 is a sphere, a cylinder or other shapes; and the third blocking part 600 cannot pass through the first passage 6300, wherein the first passage 6300 may be a cylindrical passage, or may be a slit on the second blocking part 630.

Further preferably, the second blocking portion 630 is further provided with a second channel 6301 for the third blocking portion 600 to slide left and right, the second channel 6301 is communicated with the first channel 6300, and when the third connecting member 63 slides to the side surface of the second blocking portion 630 and abuts against the first mounting seat 61, part or all of the second channel 6301 is sealed by the first mounting seat 61; further preferably, the third barrier 600 is a sphere, and the second channel 6301 is preferably a cylindrical channel; thus, the third stopper 600 can move only along the second passage 6301, and when the tilting wire 60 is released, the third connecting member 63 slides to a state where the side surface of the second stopper 630 abuts against the first mounting seat 61, thereby preventing the third stopper 600 from rolling out of the second passage 6301.

In this embodiment, as shown in fig. 6, the latch bolt assembly includes a latch bolt member 65 and an elastic member 66, a transverse second sliding hole is formed in the latch bolt mounting seat 62, the latch bolt member 65 passes through the second sliding hole and can move left and right in the second sliding hole, one end of the elastic member 66 is fixedly connected to the latch bolt member 65, and the other end of the elastic member 66 is fixedly connected to the third connecting member 63; the reason for this arrangement is that the movement of the third connecting member 63 can drive the latch member 65 to move, but when the latch member 65 is not aligned with the locking portion, the movement synchronism between the latch member 65 and the locking portion is relatively poor, specifically, when the third connecting member 63 returns to the initial position, the latch member 65 is in a state of abutting against the locking plate 4, and therefore the latch member 65 and the locking portion need to be connected through the elastic member 66 to compensate for the position difference in the movement process, and meanwhile, in the rotation process of the locking plate 4, the latch member 65 is aligned with the locking portion, and then under the action of the elastic member 66, the latch member 65 and the locking portion are matched to complete the locking of the locking plate 4.

Further preferably, the elastic member 66 may be an elastic plate or a torsion spring 71; specifically, the third connecting member 63 is provided with a transverse through hole, and both ends of the through hole are provided with screw portions, wherein the first blocking portion 67 is preferably a screw with a washer and is fixedly mounted on the third connecting member 63, and the elastic member 66 is fixedly mounted on the side surface of the third connecting member 63 on the other side of the second blocking portion 630 by the screw.

In this embodiment, as shown in fig. 8, the plurality of locking portions at least include first locking long holes 40 and second locking long holes 41 distributed at intervals, the first locking long holes 40 are located behind the second locking long holes 41, both ends of the first locking long holes 40 and both ends of the second locking long holes 41 point in the up-down direction, and the second locking long holes 41 are rotated counterclockwise by 1 to 20 ° with respect to the first locking long holes 40. Further preferably, the second locking long hole 41 is rotated counterclockwise by 5 to 15 ° compared to the first locking long hole 40; the requirement on the matching precision of the locking structure is reduced by arranging the locking long holes, the processing difficulty is further reduced, and meanwhile, compared with the first locking long hole 40, the second locking long hole 41 has the advantage that the lock tongue piece 65 can be better matched with the second locking long hole 41 in a counterclockwise rotating mode.

Further preferably, the plurality of locking portions further include locking notches 42, the locking notches 42 are in the shape of a portion of the first locking long hole 40 or the second locking long hole 41, and the locking notches 42 are rotated counterclockwise by 1 to 20 ° with respect to the second locking long hole 41. Further preferably, the second locking long hole 41 is rotated counterclockwise by 5 to 15 ° compared to the second locking long hole 41; the arrangement is that the locking notch 42 is a locking structure with the largest angle in the tilting locking assembly 6, which limits the rotation of the locking plate 4 towards the direction of decreasing tilting angle, and the cooperation of the first connecting shaft 10 and the first long hole 12 limits the rotation of the locking plate 4 towards the direction of increasing tilting angle, and the two modes cooperate to complete the locking of the locking plate 4; in addition, the unfilled corner corresponding to the locking notch 42 on the lock plate 4 can prevent the lock plate 4 from touching the fixed seat 1 in the rotating process.

In this embodiment, still be equipped with lift locking Assembly 7, including lift 70, torsional spring 71, clamp plate 72 and the turn round 73 of acting as go-between, the one end of clamp plate 72 and torsional spring 71 cooperation and rotatable the installing on first mount pad 61, the rotatable installing on first mount pad 61 of turn round 73, the one end of lift 70 of acting as go-between is equipped with the fourth stop part, the one end of lift 70 of acting as go-between is walked around the other end clearance fit through fourth stop part and clamp plate 72 behind the turn round 73 from the bottom of turn round 73.

In this embodiment, a reinforcing plate 8 is further provided, the reinforcing plate 8 is mounted on the fixing seat 1, and the first mounting seat 61 and the bolt mounting seat 62 are both fixedly mounted on the reinforcing plate 8; specifically, the front half section of the reinforcing plate 8 is supported by the first connecting shaft 10, and the rear half section of the reinforcing plate 8 is supported by the inclined surface on the fixed seat 1; so set up, increased the structural strength of whole tray on the one hand, on the other hand has also made things convenient for the installation of the locking Assembly 6 that inclines and faces upward.

Preferably, a first extending portion extends downwards from the middle section of the reinforcing plate 8, and the bottom of the first extending portion abuts against the fixed seat 1; this arrangement further enhances the strength of the reinforcing plate 8.

A chair comprising a self-carrying tray as described above.

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. A self-loading tray is characterized by comprising a fixing seat (1) fixedly connected with a seat support supporting rod, a first base (2) fixedly connected with the seat support and a second base (3) fixedly connected with a seat back, wherein the fixing seat (1) is further provided with two first spring assemblies (5), a locking plate (4), a first connecting shaft (10) and a second connecting shaft (11), the first connecting shaft (10) is positioned in front of the second connecting shaft (11), one end of the second base (3) is hinged with the first base (2), the other end of the second base (3) is hinged with the fixing seat (1), the first base (2) is movably connected with the fixing seat (1) through the first connecting shaft (10), the second connecting shaft (11) is fixedly arranged on the fixing seat (1), and the front end of the locking plate (4) is rotatably arranged on the first connecting shaft (10), the rear end and the second connecting axle (11) swing joint of jam plate (4), two first spring unit (5) are located the both sides of jam plate (4) respectively, the front end and first connecting axle (10) swing joint of first spring unit (5), the rear end and the second connecting axle (11) swing joint of first spring unit (5).

2. A self-loading pallet as claimed in claim 1, wherein the left and right sides of the fixed base (1) are respectively provided with an inclined first slot (12), both ends of the first connecting shaft (10) are fixedly connected with the first base (2) after passing through the two first slots (12), and the first connecting shaft (10) is in clearance fit with the first slots (12);

be equipped with second slot hole (43) on jam plate (4), jam plate (4) are established through second slot hole (43) cover and are installed on second connecting axle (11), second connecting axle (11) and second slot hole (43) clearance fit.

3. A self-carrying pallet as claimed in claim 1, characterised in that when the first connecting axle (10) moves from bottom to top in the first slot (12), the first connecting axle (10) moves simultaneously from front to back in the first slot (12);

the first base (2) is hinged to the second base (3) through a third connecting shaft (13), the second base (3) is hinged to the fixing base (1) through a fourth connecting shaft (14), and the third connecting shaft (13) is located above the fourth connecting shaft (14) and in front of the fourth connecting shaft (14).

4. A self-carrying pallet as claimed in claim 1, characterised in that said first spring assembly (5) comprises a first spring member (50), a first connecting member (51) and a second connecting member (52), said first connecting member (51) being rotatably mounted on the first connecting shaft (10), said second connecting member (52) being rotatably mounted on the second connecting shaft (11), said first spring member (50) being telescopically mounted on a portion of the first connecting member (51) and a portion of the second connecting member (52), said first connecting member (51) and said second connecting member (52) being adapted to move towards and away from each other.

5. The self-loading tray as claimed in claim 1, further comprising a tilting locking assembly (6) comprising a tilting pull line (60), a first mounting seat (61) and a bolt mounting seat (62) which are mounted on the fixing seat (1), a second spring assembly which can move left and right and is mounted on the first mounting seat (61), and a bolt assembly which can move left and right and is mounted on the bolt mounting seat (62), wherein the locking plate (4) is provided with a plurality of locking portions, the second spring assembly can move left and right on the first mounting seat (61) by tightening and loosening the tilting pull line (60), and the bolt assembly is driven to move left and right on the bolt mounting seat (62) to be matched with the locking portions to limit the rotation of the locking plate (4).

6. A self-carrying tray as claimed in claim 5, wherein the second spring assembly comprises a third connecting member (63) and a second spring member (64) sleeved on the third connecting member (63), the first mounting seat (61) is provided with a transverse first sliding hole (610), the third connecting member (63) passes through the first sliding hole (610) and can move left and right in the first sliding hole (610), one end of the third connecting member (63) is provided with a first blocking portion (67), the other end of the third connecting member (63) is provided with a second blocking portion (630), the first blocking portion (67) and the second blocking portion (630) are respectively located at the left and right ends of the first sliding hole (610), one end of the second spring member (64) abuts against the first blocking portion (67) and the other end of the second spring member (64) abuts against the first mounting seat (61), the second blocking part (630) is movably matched with the tilting pull wire (60).

7. The self-loading pallet according to claim 6, further comprising a third blocking portion (600), wherein the second blocking portion (630) is provided with a first channel (6300) through which only the tilting line (60) can pass, and the inner end of the tilting line (60) passes through the first channel (6300) and then is fixedly connected to the third blocking portion (600).

8. A self-carrying pallet as claimed in claim 5, characterised in that the latch assembly comprises a latch member (65) and a resilient member (66), the latch mounting base (62) being provided with a second transverse sliding aperture through which the latch member (65) passes and is movable to the left and right within the second sliding aperture, one end of the resilient member (66) being fixedly connected to the latch member (65) and the other end of the resilient member (66) being fixedly connected to the third connecting member (63).

9. A self-carrying tray as claimed in claim 5, wherein the plurality of locking portions comprise at least first locking long holes (40) and second locking long holes (41) which are spaced apart from each other, the first locking long holes (40) are located behind the second locking long holes (41), both ends of the first locking long holes (40) and both ends of the second locking long holes (41) point in the up-down direction, and the second locking long holes (41) are rotated counterclockwise by 1-20 ° with respect to the first locking long holes (40).

10. A chair comprising a self-carrying tray as claimed in any one of claims 1 to 9.