CN108420214A

CN108420214A - A kind of chair with Lumbar regulatory function

Info

Publication number: CN108420214A
Application number: CN201810146869.5A
Authority: CN
Inventors: 王江林; 王郑兴; 王星
Original assignee: Zhejiang Henglin Chair Industry Co Ltd
Current assignee: Zhejiang Henglin Chair Industry Co Ltd
Priority date: 2017-02-28
Filing date: 2018-02-12
Publication date: 2018-08-21
Anticipated expiration: 2038-02-12
Also published as: CN108420214B; CN209106628U

Abstract

The present invention relates to field of furniture, more particularly to a kind of chair with Lumbar regulatory function, including the chair back, seat and footing, the chair back is equipped with cavity, top in the cavity is equipped with supporter by lifting device for folding, the device for folding that lifts includes fixed seat and linking arm, the fixed seat is equipped with fixed arm, fixed arm and linking arm are hinged, and the fixation of at least two linking arms is moved synchronously by the block that is rigidly connected, the fixed seat is fixed with the chair back, and the rigid connection block is fixed with supporter.The present invention on the chair back by being arranged cavity, and support element is mounted in cavity, hinged with the chair back by lifting device for folding, the lumbar support for realizing the chair back is adjusted, and the multiple linking arms fixation for lifting device for folding moves synchronously, and reduces the risk that supporter rocks when in use.

Description

A kind of chair with Lumbar regulatory function

Technical field

The present invention relates to field of furniture more particularly to a kind of chairs with Lumbar regulatory function.

Background technology

Inferior health is always problem concerning life of people's attention, wherein because of the lumbar vertebrae problem particularly frequency that sitting is brought to people It is numerous, it is well known that under human spine is S-type, and the chair back of seat is in the upper and lower straight or chair back now Portion, which has, slightly to arch upward to improve the comfort of chair back support, but the chair of these structures all cannot be to the S type ridges of human body Column is preferably supported, and the general back-supported angle of chair of these structures is unadjustable, cannot meet individual difference, because This can not solve the problems, such as the vertebra that sitting is brought to user.

Although the existing chair with Lumbar in currently available technology, under the position of Lumbar is normally in chair Portion, and the length of Lumbar is shorter, adjustable range is limited, and Lumbar width is wide, cannot be formed to the vertebra in the middle part of human body Preferable support, influences support effect.

Invention content

In order to solve the above technical problems, the object of the present invention is to provide a kind of chair with Lumbar regulatory function, The adjusting stroke range bigger of the Lumbar of the chair, it is more prominent to the support of waist, it is effective to reduce pressure of the upper limb to lumbar vertebrae Compel.

In order to achieve the above-mentioned object of the invention, present invention employs technical solutions below：

A kind of chair with Lumbar regulatory function, including the chair back (1), seat (4) and footing, it is characterised in that：It is described The chair back (1) is equipped with cavity (8), and the top in the cavity (8) is equipped with supporter (2) by lifting device for folding (3), described to lift Device for folding (3) includes fixed seat (30) and linking arm (35), and the fixed seat (30) is equipped with fixed arm (32), fixed arm (32) It is hinged with linking arm (35), and moved synchronously at least two linking arms (35) fixation by the block (36) that is rigidly connected, it is described solid Reservation (30) is fixed with the chair back (1), and the rigid connection block (36) is fixed with supporter (2).

A kind of chair with Lumbar regulatory function according to claim 1, it is characterised in that：The fixed arm (32) side is additionally provided with cover board (31), and the linking arm (35) is hinged on the cavity that fixed arm (32) is formed with cover board (31) It is interior；It is also hinged with pawl block (33) on fixed arm (32), ratchet wheel block (34) is fixed on the hinged end of the linking arm (35), even It is hinged by the first axis pin (321) and fixed arm (32) to connect arm (35), ratchet wheel block (34) and the hinged end of linking arm (35) are fixed Connection, pawl block (33) is hinged by the second axis pin (322) and fixed arm (32), and cover board (31) passes through the first axis pin (321), the Two axis pins (322) are fixedly connected with fixed arm (32), are fixed with spring leaf (39) on cover board, spring leaf (39), pawl block (33), The hinged end of ratchet wheel block (34) and linking arm (35) is all disposed in the cavity that fixed arm (32) is formed with cover board (31)；Its In, there are two swinging end, the bottom moved ends of pawl block (33) to be equipped with pawl (333) for pawl block (33) tool, and pawl block is put on (33) Moved end is equipped with ratchet pawl reset protrusion (334), and it is recessed to form ratchet pawl reset for recess between pawl (333) and ratchet pawl reset raised (334) Slot (335) is equipped with multiple hook tooths (348) on ratchet wheel block (34) circumference successively from bottom to up, ratchet resets raised (346) and spine Positioning protrusion (343) is taken turns, hook tooth (348) can be engaged with pawl (333), and ratchet resets raised (346) and ratchet convex Recess forms the first ratchet reset groove (345) between playing (343), and the ratchet of ratchet wheel block (34) resets raised (346) and is located at spine In the ratchet pawl reset groove (335) of rest shoe (33), the fixing end of spring leaf (39) is fixed on cover board (31) thus and fixed arm (32) it is fixedly connected, the movable end of spring leaf (39) is folded upward at and offsets with the pawl end back of pawl block (33), pawl block (33) pawl end back is equipped with locating notch (332), and spring leaf (39) assigns the becoming of being rotated up of pawl of pawl block (33) Gesture, but when the movable end of spring leaf (39) enters locating notch (332), spring leaf (39) does not revest pawl block (33) The trend that pawl is rotated up.

Preferably, when the pawl (333) of pawl block (33) is engaged with the hook tooth (348) of ratchet wheel block (34), connection Arm (35) realizes that positioning, i.e. supporter are accommodated in backrest cavity or start upwards certain angle and realize positioning support；Connection When arm (35) continues up rotation, i.e., supporter continues up when starting, pawl (333) and the ratchet wheel block (34) of pawl block (33) Hook tooth (348) be disengaged from, the first ratchet that the ratchet pawl reset of pawl block (33) raised (334) enters ratchet wheel block (34) is multiple In position groove (345), the ratchet pawl reset of ratchet positioning protrusion (343) the compressing pawl block (33) of ratchet wheel block (34) is raised (334) It rotates down, the movable end of spring leaf (39) enters in the locating notch (332) of pawl block (33) to not revest pawl block (33) trend that pawl is rotated up, i.e. pawl block (33) enter positioning states, and the pawl (333) of pawl block (33) will not be with The hook tooth (348) of ratchet wheel block (34) engages；Hereafter, when linking arm (35) rotates down, the pawl (333) of pawl block (33) is no It can be engaged with the hook tooth (348) of ratchet wheel block (34), until the ratchet in the ratchet pawl reset groove (335) of pawl block (33) The ratchet pawl reset that the ratchet of block (34) resets raised (346) upward pushing tow pawl block (33) is raised (334), so that pawl block (33) positioning states are detached from, the pawl (333) of pawl block (33) is rotated up and is nibbled with the hook tooth (348) of ratchet wheel block (34) It closes, realizes the reset of linking arm and supporter.

Preferably, the both sides of one end of the cover board (31) are equipped with gear along (38), two gears are spaced between (38) to be set There is locating piece (37), spring leaf (39) is set on the locating piece (37), the middle part of the spring leaf (39) is located at a positioning The both ends in the outside of block (37), the spring leaf (39) are located at the inside of another locating piece (37) and keep off along the interior of (38) Side, and the spring leaf (39) on the inside of another locating piece (37) is folded upward at and offsets with pawl block (33).

Preferably, two fixed arms (32) are fixed on the both sides in the middle part of fixed seat (30), two adjustable plates (302) are respectively It is hinged on the both sides of fixed arm (32), the fixed arm (32) is equipped with the first mounting hole, and the adjustable plate (302) is equipped with the Two mounting holes (3021), and the side of the second mounting hole is zigzag edge (3022), first mounting hole and the second installation Hole (3021) is aligned, and the shrapnel (304) and fixture block abutted is equipped in the first mounting hole and the second mounting hole (3021) (3031), and fixture block (3031) is clamped with zigzag edge (3022), and linking arm (35) sandwiched is fixed on two adjustable plates (302) between；The three of circular through hole (3201) and receiving fixture block (3031) of first mounting hole including receiving shrapnel (304) Angular through-hole (3203), and the transition position of circular through hole (3201) and triangle through hole (320) is equipped with and jacks up shrapnel (304) Arc bump (3202), first mounting hole are additionally provided with the arc-shaped edges rotated convenient for fixture block (3031) along (3204), the card The side that block (3031) is contacted with zigzag edge (3022) is additionally provided with bayonet (3031), and the outside of two adjustable plates (302) is also Equipped with buckle closure (301).

Preferably：The height of the cavity is 70% or more of chair back whole height.Since housing depth is higher, So that the length of supporter is larger, and the top of supporter and the chair back are hinged, so that no matter supporter is being indulged in overturning To or horizontal direction on adjustable range it is wider.On the other hand it since the length of supporter is longer, therefore even if is turned in supporter When producing to provide lumbar support, human body back can also be leaned on supporter and is more bonded, more comfortably.

Preferably：The chair back front upper is equipped with headrest, and the cavity is arranged in the lower section of headrest, the chamber The height of body is 60% or more of chair back whole height.

Preferably：The width of the cavity is the 30%-80% of chair back overall width.Housing width determines branch The width of support body becomes apparent from the support effect of the backbone of human body when supporter is relatively narrow, and when supporter is wider, supporter is to people The stress unobvious of body backbone, effect are bad.

Preferably：The supporter includes upper end and supportive body, and the thickness of the upper end is that support is led The 1/4~1/2 of body thickness, and pass through the first cambered surface transition between upper end and supportive body.The structure of supporter to lift folding Device can be fixed on the outside of supporter, and body easy to support or the maintenance for lifting device for folding are replaced.

Preferably：The supportive body lower end passes through the second cambered surface transition from the front to the back.With turning over for supporter Modulation section, the lower end of supporter and the contact position of human body waist constantly change, and the lower end of supporter uses cambered surface transition It can guarantee that supporter is bonded always with human body waist, dependence is more comfortable.

Preferably：The shape of the supporter and the shape of cavity match, and the shape and the chair back of supporter Global shape is consistent.

Preferably：The device for folding that lifts is drivingly connected arm rotation using gas bar or air bag.

The present invention is installed by the way that cavity is arranged on the chair back, and by supporter in the cavity, by lifting device for folding and chair The back of the body is hinged, and the lumbar support for realizing the chair back is adjusted, and the multiple linking arms fixation for lifting device for folding moves synchronously, and reduces support The risk that body rocks when in use.

Description of the drawings

Fig. 1 is the chair cross-sectional view of the present invention.

Fig. 2 is the cavity of the chair of the present invention and lifts the structural schematic diagram of device for folding.

Fig. 3 is the structural schematic diagram of the supporter of the present invention.

Fig. 4 is the attachment structure schematic diagram of the chair back and supporter of the present invention.

Fig. 5 is that the another kind of the present invention lifts the structural schematic diagram of device for folding.

Fig. 6 is that the another kind of the present invention lifts the covering plate structure schematic diagram of device for folding.

Fig. 7 is that the another kind of the present invention lifts the pawl block structural schematic diagram of device for folding.

Fig. 8 is that the another kind of the present invention lifts the ratchet wheel block and linking arm structural schematic diagram of device for folding.

Fig. 9 be the another kind of the present invention lift device for folding lift folding one of process schematic.

Figure 10 is that the another kind of the present invention lifts lift folding process schematic two of device for folding.

Figure 11 is that the another kind of the present invention lifts lift folding process schematic three of device for folding.

Figure 12 is that the another kind of the present invention lifts lift folding process schematic four of device for folding.

Figure 13 is that the another kind of the present invention lifts lift folding process schematic five of device for folding.

Figure 14 is that the another kind of the present invention lifts lift folding process schematic six of device for folding.

Figure 15 is that another of the present invention lifts the structural schematic diagram of device for folding.

Figure 16 is that another of the present invention lifts the operation principle structure chart of device for folding.

Figure 17 be the present invention another lift device for folding the second adjustable plate structural schematic diagram.

Figure 18 be the present invention another lift device for folding the first adjustable plate structural schematic diagram.

Specific implementation mode

The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.

In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", " clockwise ", " inverse The orientation or positional relationship of the instructions such as hour hands " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description originally Invention and simplified description, do not indicate or imply the indicated device or element must have a particular orientation, with specific side Position construction and operation, therefore be not considered as limiting the invention.

In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more this feature.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two It is a or more than two, unless otherwise restricted clearly.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc. Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine Tool connects, and can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary two members Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be Concrete meaning in bright.

In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or "lower" It may include that the first and second features are in direct contact, can also not be to be in direct contact but pass through it including the first and second features Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " include first special Sign is right over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.Fisrt feature exists Second feature " under ", " lower section " and " following " include fisrt feature immediately below second feature and obliquely downward, or be merely representative of Fisrt feature level height is less than second feature.

Embodiment 1：

A kind of chair with Lumbar regulatory function as Figure 1-Figure 4, including the chair back 1, seat 4 and footing, it is described The chair back 1 is equipped with cavity 8, and the top in the cavity 8 is equipped with supporter 2 by lifting device for folding.1 front upper of the chair back Equipped with headrest 5, the cavity 8 is arranged in the lower section of headrest 5, the height of the cavity 8 be the 60% of 1 whole height of the chair back with On.If being not provided with resting the head on the chair back, the height of the cavity 8 is 70% or more of 1 whole height of the chair back.

The width of the cavity 8 is the 30%-80% of 1 overall width of the chair back.Housing width determines the width of supporter, The support effect of the backbone of human body is become apparent from when supporter is relatively narrow, and when supporter is wider, supporter to human spine by Power unobvious, effect are bad.

The supporter 2 includes upper end 21 and supportive body 22, and the thickness of the upper end 21 is that supportive body 22 is thick The 1/4~1/2 of degree, and pass through 24 transition of the first cambered surface between upper end 21 and supportive body 22.The device for folding 3 that lifts can have One, two or more, preferably, as shown in figure 4, it is described lift device for folding 3 be two, be respectively positioned on the upper end of supporter 2 Between portion 21 and the chair back 1, and two are lifted the setting of device for folding interval, and described two device for folding 3 that lift are respectively close to supporter level side To left and right ends.

22 lower end of the supportive body passes through 23 transition of the second cambered surface from the front to the back.It is adjusted with the overturning of supporter, branch The lower end of support body and the contact position of human body waist constantly change, and the lower end of supporter can guarantee support using cambered surface transition Body is bonded always with human body waist, and dependence is more comfortable.

The shape of the supporter 2 and the shape of cavity 8 match, and the shape of supporter 2 and 1 global shape phase of the chair back Unanimously.The device for folding 3 that lifts uses the matched structure of ratchet and pawl, and the upper end for lifting device for folding 3 passes through chair back fixing piece 6 It is fixed with the chair back 1, lower end is fixed by supporter fixing piece 7 and supportive body 22.The device for folding 3 that lifts can also use gas bar Or air bag.

Supporter is turned over into cavity when user is in leisure, so that supporter is merged with the chair back, becomes one of the chair back Point.When user works, supporter is routed up, contacts at the back of user, slows down compressing of the upper limb to user's lumbar vertebrae, Effective protection lumbar vertebrae.The present invention is not limited only to this realization method, such as：The chair back is divided into 2 sections or multistage, in its waist The structure, which is arranged, in section can also reach identical advantageous effect.

Embodiment 2

Such as Fig. 1, Fig. 5 and a kind of chair with Lumbar regulatory function shown in fig. 6, including the chair back 1, seat 4 and footing, The chair back 1 is equipped with cavity 8, and the top in the cavity 8 is equipped with supporter 2 by lifting device for folding 3, described to lift device for folding 3 include fixed seat 30 and linking arm 35, and the fixed seat 30 and linking arm 35 are hinged, and will at least two by the block 36 that is rigidly connected The fixation of a linking arm 35 moves synchronously.

The fixed seat 30 is fixed with the chair back 1, and the rigid connection block 36 is fixed with supporter 2, the fixed seat 30 The both ends at middle part turn down to form fixed arm 32 to homonymy, and the side of the fixed arm 32 is additionally provided with cover board 31, the linking arm 35 It is hinged in the cavity that fixed arm 32 is formed with cover board 31.

As shown in Fig. 5 to Figure 14 institutes, pawl block 33, the hinged end of the linking arm 35 are also hinged on the fixed arm 32 On be fixed with ratchet wheel block 34, linking arm 35 is hinged by pin hole 342, the first axis pin 321 and fixed arm 32, and ratchet wheel block 34 passes through the One axis pin 321, locating piece 341 are fixedly connected with the hinged end of linking arm 35, and pawl block 33 passes through pin hole 336, the second axis pin 322 Hinged with fixed arm 32, cover board 31 is fixedly connected by the first axis pin 321, the second axis pin 322 with fixed arm 32, fixed on cover board Have a spring leaf 39, spring leaf 39, pawl block 33, ratchet wheel block 34 and linking arm 35 hinged end be all disposed within fixed arm 32 and lid In the cavity that plate 31 is formed.Wherein, there are two swinging ends, the bottom moved end of pawl block 33 to be equipped with pawl 333, spine for the tool of pawl block 33 Swinging end is equipped with ratchet pawl reset protrusion 334 on rest shoe 33, and it is multiple to form pawl for recess between pawl 333 and ratchet pawl reset protrusion 334 Position groove 335 is equipped with multiple hook tooths 348 on 34 circumference of ratchet wheel block successively from bottom to up, ratchet resets protrusion 346 and ratchet is fixed Position protrusion 343, hook tooth 348 can be engaged with pawl 333, and ratchet resets to be recessed between protrusion 346 and ratchet positioning protrusion 343 It forms the first ratchet and resets groove 345, the ratchet of ratchet wheel block 34 resets the ratchet pawl reset groove that protrusion 346 is located at pawl block 33 In 335, ratchet resets recess between protrusion 346 and hook tooth 348 and forms the second ratchet reset groove 347, and spring leaf 39 is consolidated Fixed end is fixed on cover board 31 to being fixedly connected with fixed arm 32, the movable end of spring leaf 39 be folded upward at and with pawl block 33 Pawl end back offset, the pawl end back of pawl block 33 is equipped with locating notch 332, and spring leaf 39 assigns the spine of pawl block 33 The trend that pawl is rotated up, but when the movable end of spring leaf 39 enters locating notch 332, spring leaf 39 does not revest pawl The trend that the pawl of block 33 is rotated up.

In the present embodiment, the both sides of one end of the cover board 31, which are equipped with gear and are equipped at intervals between 38 along 38, two gears, determines Position block 37, described to determine that spring leaf 39 is arranged on outer block 37, the middle part of the spring leaf 39 is located at the outside of a locating piece 37, institute The both ends for stating spring leaf 39 are located at the inside of another locating piece 37 and keep off along 38 inside, and are located at another locating piece The spring leaf 39 of 37 insides is folded upward to offset with pawl block 33.The hinged end of linking arm 35 has tooth identical with ratchet wheel block 34 Shape, the two coordinate with pawl block 33 jointly.The tool of pawl block 33 there are three pawl 333, the length of three pawls 333 from top to bottom according to It is secondary to successively decrease.

As shown in Fig. 9, Figure 10, Figure 11, when the pawl 333 of pawl block 33 is engaged with the hook tooth 348 of ratchet wheel block 34, even It connects arm 35 and realizes that positioning, i.e. supporter are accommodated in backrest cavity or start upwards certain angle and realize positioning support；Connection When arm 35 continues up rotation, i.e., supporter continues up when starting, the hook tooth of the pawl 333 and ratchet wheel block 34 of pawl block 33 348 are disengaged from, and as shown in figure 12, the first ratchet reset of ratchet pawl reset protrusion 334 into the ratchet wheel block 34 of pawl block 33 is recessed In slot 345, the ratchet pawl reset protrusion 334 of the compressing pawl block 33 of ratchet positioning protrusion 343 of ratchet wheel block 34 rotates down, spring leaf 39 movable end enters becoming to not revest that the pawl of pawl block 33 is rotated up in the locating notch 332 of pawl block 33 Gesture, as shown in figure 13, i.e., pawl block 33 enters positioning states, and the pawl 333 of pawl block 33 will not be with the hook tooth of ratchet wheel block 34 348 engagements；Hereafter, when linking arm 35 rotates down, the pawl 333 of pawl block 33 will not be nibbled with the hook tooth 348 of ratchet wheel block 34 It closes, until the ratchet of the ratchet wheel block 34 in the ratchet pawl reset groove 335 of pawl block 33 resets raised 346 upward pushing tow pawls The ratchet pawl reset protrusion 334 of block 33, as shown in figure 14, so that pawl block 33 is detached from positioning states, the pawl of pawl block 33 333 are rotated up and are engaged with the hook tooth of ratchet wheel block 34 348, as shown in figure 9, realizing the reset of linking arm and supporter.

The height of the cavity 8 is 70% or more of 1 whole height of the chair back.1 front upper of the chair back is equipped with headrest 5, The cavity 8 is arranged in the lower section of headrest 5, and the height of the cavity 8 is 60% or more of 1 whole height of the chair back.The cavity 8 Width be 1 overall width of the chair back 30%-80%.

The supporter 2 includes upper end 21 and supportive body 22, and the thickness of the upper end 21 is that supportive body 22 is thick The 1/4~1/2 of degree, and pass through 24 transition of the first cambered surface between upper end 21 and supportive body 22.22 lower end of the supportive body Pass through 23 transition of the second cambered surface from the front to the back.The shape of the supporter 2 and the shape of cavity 8 match, and the shape of supporter 2 Shape is consistent with 1 global shape of the chair back.The device for folding 3 that lifts is drivingly connected the rotation of arm 35 using gas bar or air bag.

Embodiment 3：

A kind of chair with Lumbar regulatory function as shown in Fig. 1, Figure 15 and Figure 16, including the chair back 1, seat 4 and bottom Foot, the chair back 1 are equipped with cavity 8, and the top in the cavity 8 is equipped with supporter 2 by lifting device for folding 3, described to lift folding Device 3 includes fixed seat 30 and linking arm 35, and the fixed seat 30 and linking arm 35 are hinged, and near by the block 36 that is rigidly connected Few two linking arms 35 fixation moves synchronously.

In the present embodiment, as shown in Figure 15, Figure 16, the device for folding 3 that lifts includes fixed seat 30, fixed arm 32, adjustable plate 302 and linking arm 35, two fixed arms 32 are fixed on the both sides at 30 middle part of fixed seat, and two adjustable plates 302 are respectively hinged at solid The both sides of fixed arm 32, the fixed arm 32 are equipped with the first mounting hole, and the adjustable plate 302 is equipped with the second mounting hole 3021, And second the side of mounting hole be zigzag edge 3022, first mounting hole and the alignment of the second mounting hole 3021, and first The shrapnel 304 abutted and fixture block 3031, and fixture block 3031 and zigzag side are equipped in mounting hole and the second mounting hole 3021 Along 3022 clampings, 35 sandwiched of the linking arm is fixed between two adjustable plates 302, and passes through rigidity between two linking arms 35 Link block 36 connects.

First mounting hole includes the circular through hole 3201 for accommodating shrapnel 304 and the triangle through hole for accommodating fixture block 3031 3203, and the transition position of circular through hole 3201 and triangle through hole 320 is equipped with the arc bump 3202 for jacking up shrapnel 304.Institute It states the first mounting hole and is additionally provided with the arc-shaped edges that are rotated convenient for fixture block 3031 along 3204, the fixture block 3031 and zigzag edge 3022 The side of contact is additionally provided with bayonet 3031.The outside of two adjustable plates 302 is additionally provided with buckle closure 301.

It should be pointed out that above example is only the representative example of the present invention.The present invention can also there are many deformations.It is every Essence according to the present invention is considered as belonging to this to any simple modification, equivalent change and modification made by above example The protection domain of invention.

Claims

1. a kind of chair with Lumbar regulatory function, including the chair back (1), seat (4) and footing, it is characterised in that：The chair It carries on the back (1) and is equipped with cavity (8), the top in the cavity (8) is equipped with supporter (2) by lifting device for folding (3), described to lift folding Device (3) includes fixed seat (30) and linking arm (35), and the fixed seat (30) is equipped with fixed arm (32), fixed arm (32) and Linking arm (35) is hinged, and is moved synchronously at least two linking arms (35) fixation by the block (36) that is rigidly connected, the fixation Seat (30) is fixed with the chair back (1), and the rigid connection block (36) is fixed with supporter (2).

2. a kind of chair with Lumbar regulatory function according to claim 1, it is characterised in that：The fixed arm (32) Side be additionally provided with cover board (31), the linking arm (35) is hinged in the cavity that fixed arm (32) is formed with cover board (31)；Gu It is also hinged with pawl block (33) in fixed arm (32), ratchet wheel block (34), linking arm are fixed on the hinged end of the linking arm (35) (35) hinged by the first axis pin (321) and fixed arm (32), ratchet wheel block (34) is fixedly connected with the hinged end of linking arm (35), Pawl block (33) is hinged by the second axis pin (322) and fixed arm (32), and cover board (31) passes through the first axis pin (321), the second pin Axis (322) is fixedly connected with fixed arm (32), and spring leaf (39), spring leaf (39), pawl block (33), ratchet are fixed on cover board The hinged end of block (34) and linking arm (35) is all disposed in the cavity that fixed arm (32) is formed with cover board (31)；Wherein, spine There are two swinging end, the bottom moved ends of pawl block (33) to be equipped with pawl (333) for rest shoe (33) tool, and swinging end is set on pawl block (33) There is ratchet pawl reset raised (334), recess forms ratchet pawl reset groove between pawl (333) and ratchet pawl reset protrusion (334) (335), it is equipped with multiple hook tooths (348) successively from bottom to up on ratchet wheel block (34) circumference, ratchet resets raised (346) and ratchet Positioning protrusion (343), hook tooth (348) can be engaged with pawl (333), and ratchet resets raised (346) and ratchet positioning protrusion (343) recess forms the first ratchet reset groove (345) between, and the ratchet of ratchet wheel block (34) resets raised (346) and is located at pawl In the ratchet pawl reset groove (335) of block (33), the fixing end of spring leaf (39) is fixed on cover board (31) thus and fixed arm (32) it is fixedly connected, the movable end of spring leaf (39) is folded upward at and offsets with the pawl end back of pawl block (33), pawl block (33) pawl end back is equipped with locating notch (332), and spring leaf (39) assigns the becoming of being rotated up of pawl of pawl block (33) Gesture, but when the movable end of spring leaf (39) enters locating notch (332), spring leaf (39) does not revest pawl block (33) The trend that pawl is rotated up.

3. a kind of chair with Lumbar regulatory function according to claim 2, it is characterised in that：When pawl block (33) When pawl (333) is engaged with the hook tooth (348) of ratchet wheel block (34), linking arm (35) realizes positioning, i.e., supporter, which is accommodated in, leans on It in back of the body cavity or starts certain angle upwards and realizes positioning support；When linking arm (35) continues up rotation, i.e., supporter after When continuing upward start, the pawl (333) of pawl block (33) is disengaged from the hook tooth (348) of ratchet wheel block (34), pawl block (33) the first ratchet that ratchet pawl reset raised (334) enters ratchet wheel block (34) resets in groove (345), the spine of ratchet wheel block (34) The ratchet pawl reset raised (334) that wheel positioning protrusion (343) oppresses pawl block (33) rotates down, the movable end of spring leaf (39) into Enter in the locating notch (332) of pawl block (33) to not revest the trend that the pawl of pawl block (33) is rotated up, i.e. spine Rest shoe (33) enters positioning states, and the pawl (333) of pawl block (33) will not be engaged with the hook tooth (348) of ratchet wheel block (34)； Hereafter, when linking arm (35) rotates down, the pawl (333) of pawl block (33) will not be with the hook tooth (348) of ratchet wheel block (34) Engagement, until the ratchet of the ratchet wheel block (34) in the ratchet pawl reset groove (335) of pawl block (33) reset raised (346) to The ratchet pawl reset of upper pushing tow pawl block (33) is raised (334), so that pawl block (33) is detached from positioning states, pawl block (33) Pawl (333) be rotated up and engaged with the hook tooth (348) of ratchet wheel block (34), realize linking arm and supporter reset.

4. a kind of chair with Lumbar regulatory function according to claim 2, it is characterised in that：The cover board (31) The both sides of one end are equipped with gear along (38), and two gears are equipped at intervals with locating piece (37) between (38), are set on the locating piece (37) Set spring leaf (39), the middle part of the spring leaf (39) is located at the outside of a locating piece (37), and the two of the spring leaf (39) End is located at the inside of the inside and gear edge (38) of another locating piece (37), and on the inside of another locating piece (37) Spring leaf (39) is folded upward to offset with pawl block (33).

5. a kind of chair with Lumbar regulatory function according to claim 1, it is characterised in that：Two fixed arms (32) The both sides in the middle part of fixed seat (30) are fixed on, two adjustable plates (302) are respectively hinged at the both sides of fixed arm (32), the fixation Arm (32) is equipped with the first mounting hole, and the adjustable plate (302) is equipped with the second mounting hole (3021), and the one of the second mounting hole Side is zigzag edge (3022), and first mounting hole and the second mounting hole (3021) are aligned, and the first mounting hole and second The shrapnel (304) abutted and fixture block (3031), and fixture block (3031) and zigzag edge are equipped in mounting hole (3021) (3022) it is clamped, linking arm (35) sandwiched is fixed between two adjustable plates (302)；First mounting hole includes accommodating The circular through hole (3201) of shrapnel (304) and the triangle through hole (3203) for accommodating fixture block (3031), and circular through hole (3201) It is equipped with the arc bump (3202) for jacking up shrapnel (304) with the transition position of triangle through hole (320), first mounting hole is also Equipped with the arc-shaped edges that are rotated convenient for fixture block (3031) along (3204), what the fixture block (3031) contacted with zigzag edge (3022) Side is additionally provided with bayonet (3031), and buckle closure (301) is additionally provided on the outside of two adjustable plates (302).

6. a kind of chair with Lumbar regulatory function according to claim 1, it is characterised in that：The cavity (8) Height is 70% or more of the chair back (1) whole height.

7. a kind of chair with Lumbar regulatory function according to claim 1, it is characterised in that：The chair back (1) is just Face top is equipped with headrest (5), and in the lower section of headrest (5), the height of the cavity (8) is that the chair back (1) is whole for cavity (8) setting 60% or more of body height.

8. a kind of chair with Lumbar regulatory function according to claim 1, it is characterised in that：The cavity (8) Width is the 30%-80% of the chair back (1) overall width.

9. a kind of chair with Lumbar regulatory function according to claim 1, it is characterised in that：The supporter (2) Including upper end (21) and supportive body (22), the thickness of upper end (21) is the 1/4~1/2 of supportive body (22) thickness, and Pass through the first cambered surface (24) transition between upper end (21) and supportive body (22).

10. a kind of chair with Lumbar regulatory function according to claim 1 it is characterized in that：It is described to lift device for folding (3) it uses gas bar or air bag to be drivingly connected arm (35) to rotate.