CN208540936U

CN208540936U - Back seat synchronizing linkage for office chair

Info

Publication number: CN208540936U
Application number: CN201721101442.0U
Authority: CN
Inventors: 何基; 叶金; 金明华
Original assignee: UE Furniture Co Ltd
Current assignee: UE Furniture Co Ltd
Priority date: 2017-08-30
Filing date: 2017-08-30
Publication date: 2019-02-26
Anticipated expiration: 2027-08-30

Abstract

The utility model discloses a kind of back seat synchronizing linkages for office chair, including pedestal, bracket, wraping plate and at least one crank, and the both ends of crank are hinged with bracket front part, pedestal respectively, and wraping plate is linked together with crank；The sliding slot guiding mechanism that lifting guidance is carried out to rear bracket part is equipped between rear bracket part and pedestal；Wraping plate is rotated to when having larger or smaller tilt angle relative to vertical line, so that the front of bracket rises or falls simultaneously with rear portion；The utility model is hinged with bracket front part by crank, and rear bracket part passes through sliding slot guide mechanism and base engagement；Not only to have simplified components, structure is more simple, so that wraping plate is equipped with longer lever arm, when the chair back is toppled over backward, the power acted on the chair back is transferred to crank by wraping plate, along with human leg's weight of seat front is less than weight at the buttocks at seat rear portion, so not only making the load acted on the chair back smaller, and it is easy to be lifted in front of seat.

Description

Back seat synchronizing linkage for office chair

Technical field

The utility model relates to swivel chair, office chair technical field, in particular to the synchronous connection of a kind of back seat for office chair Dynamic device.

Background technique

Existing for synchronizing the linkage of seat and the chair back in the prior art, the chair back drives seat movement when swinging back, Such as belong to NIKOV LJUBOMIR German patent DE 3735256 describe a kind of synchronous chair the chair back and seat inclination Synchronizing device.Wherein four bar bindiny mechanisms include two cranks, one preceding, another is rear.The crank is articulated with chair Between seat frame and chair pedestal, wherein the chair base frame and the rear crank of four bar bindiny mechanism are integrally formed.

The preceding crank and the rear crank tilt in different directions relative to same vertical line, i.e., if bent before described Handle is relative to vertical line in the counterclockwise direction with inclined at acute angles, then the rear crank is relative to vertical line along clockwise direction with sharp Overturning angle；Vice versa.

When the variation of the gradient of the chair back, the front of the seat rises, and the rear portion of the seat simultaneously declines, Or vice versa；This mode simultaneously is less easy to be received by all users.

In addition, the above-mentioned apparatus of NIKOV LJUBOMIR do not solve weight due to acting on the seat and not counting The problem of tilting the chair back is difficult to caused by too long of lever arm.

For another example apply for that the French Patent (FRP) FR2045120 of artificial DUPART discloses following such a synchronizing device, For by a four bar bindiny mechanisms with a lever come the inclination of synchronous chair base frame and seat back frame.The four bars connection Mechanism only includes two cranks, and the crank is articulated between pedestal and the chair base frame.The lever has two arms, and With the fulcrum being located on the pedestal.Wherein one arm is integrally formed with the seat back frame.On the contrary, it is described another Arm acts on the rear portion of the chair base frame, and the rear portion is lifted or pulled down according to the angle of the chair back and inclined direction.

Although this method structure is simple, how comfortable there is no for user.This is because: due to upper The dimension for the lever with two arms stated needs to reduce, and for the weight of user of the antagonism on seat itself, makes User needs to apply sizable power on the chair back, this causes user uncomfortable, and Experience Degree is not natural enough.

In addition, the geometry of above-mentioned DUPART patent, the patent cannot provide: when the tilt angle for changing the chair back When, the front and rear of the seat rises or falls simultaneously, and the degree of the front of the seat risen or fallen is big The degree risen or fallen in the rear portion of the seat.

Utility model content

The utility model overcomes the deficiency in the presence of the above-mentioned prior art, and it is more simple to provide firstly a kind of structure Back seat synchronizing linkage single, component is few, when which not only solves the layback of the previous chair back, it is desirable to provide biggish power Problem, to improve comfort level and using experience degree；And during chair back-rest inclination, seat front and back lift simultaneously and Front lifts degree and lifts degree greater than rear, so that being more advantageous to return.

Further to say, the utility model provides a kind of lightweight, back seat synchronizing linkage at low cost again simultaneously, The device not only reduces the body height and weight of pedestal, simplifies understructure, additionally it is possible to meet crank gradient, make chair Seat can achieve preset raising height, while also meet the bonding strength of support rod.

The technical solution of the utility model is achieved in that

For the back seat synchronizing linkage of office chair, bracket including pedestal, to connect seat, to connect the chair back Wraping plate and at least one crank, the both ends of crank are hinged with bracket front part, pedestal respectively, and the wraping plate is linked as with crank One；The sliding slot guiding mechanism that lifting guidance is carried out to rear bracket part is equipped between rear bracket part and pedestal；Wraping plate rotate to When having larger or smaller tilt angle relative to vertical line, so that the front of bracket rises or falls simultaneously with rear portion.

Preferably, the height that bracket front part rises is greater than the height that rear bracket part rises when bracket rises.Make in this way User very effective can configure the effective comfortable posture for being suitable for itself.

Preferably, the sliding slot guiding mechanism includes sliding slot and guide shaft, sliding slot is arranged in rear bracket part or pedestal In one on, the corresponding guide shaft is arranged on another in pedestal or rear bracket part, and guide shaft is threaded through cunning In slot.

Preferably, crank and the hinge joint of bracket front part, guide shaft are in the front and back two of crank Yu pedestal hinge joint respectively Side.

In order to allow bracket diagonally to go up direction movement always, preferably, sliding slot is the waist type groove being obliquely installed, crank Inclined direction it is opposite with the inclined direction of sliding slot.Crank around the hinge joint with pedestal to layback when, bracket along sliding slot backward Upper direction.

Preferably, the crank is that the front is high and the back is low, the sliding slot is low early and high after.

To keep power more balanced, movement is more synchronous, preferably, the crank is two, is symmetricly set on bottom Seat two sides.Two sides crank can be striking resemblances, can also slightly different in shape.

Preferably, the bracket includes supporting plate and the wing plate that extends downwardly along supporting plate two sides, supporting plate be in pedestal with Above crank, wing plate is located at crank two sides.

Preferably, further including having for restoring bracket and wraping plate to the elasticity reset device of initial position.

Preferably, the elasticity reset device is spring.

Preferably, the spring is pressure spring, one end of spring is constrained in the hinge joint of crank and bracket front part, spring The other end be constrained on pedestal.When wraping plate and crank are swung back, compression is carried out to spring and generates elastic force, to help reset；Pressure Spring has length short, the small feature of installation space.

Preferably, the sliding slot guiding mechanism includes sliding slot and guide shaft, guide shaft is threaded through pedestal two sides, sliding slot setting On bracket, the other end of spring is constrained on guide shaft.

Preferably, further including having to be maintained at initial or lifting status locking machine for seat synchronizing linkage will to be carried on the back Structure.

Preferably, the pedestal includes bottom plate and the side plate that upwardly extends along bottom plate two sides, the crank is two It is a, and be respectively disposed on the outside of both side plate；The locking mechanism includes locking pin and connection locking pin and carries out to locking pin The control-rod of operation, the locking pin are threaded through the first through hole that both side plate opens up, on the second through-hole, and locking pin is close to second Lock tongue is radially extended at the position of through-hole, second through-hole is communicated with the location hole with lock tongue cooperation；Wherein one A crank is equipped with lockhole, another crank is equipped with the card slot cooperated with lock tongue；Under original state, locked by the way that control-rod is mobile Rationed marketing is inserted into locking pin one end in one crank lockhole, and lock tongue is inserted into the card slot of location hole and another crank simultaneously and realizes Locking；It is same by the mobile locking pin of control-rod under raised configuration, so that locking pin one end is exposed to outside first through hole, lock tongue Positioning hole is then inserted into end, at this point, the lower edge of two cranks is ridden over respectively on the bared end and lock tongue of locking pin, realizes and rises shape Locking under state.Using above-mentioned lock mode, the bilateral locking in pedestal two sides is not only realized, safety more preferably, and operates It is convenient, it is only necessary to the advantages that mobile control-rod, while also having component few at low cost, structure is simple, easy for installation.

Preferably, the lock tongue includes a fixed lantern ring being set on locking pin, along locking pin diameter on lantern ring Extend fixture block, card slot and the location hole cooperation of the fixture block and crank to direction.Lantern ring can be fixed on lock by positioning pin In rationed marketing.

Preferably, crank is hinged by the first pin shaft and bracket front part, first pin shaft is a whole root long axis.This Sample can guarantee stability, while can be convenient and hang spring.

For the back seat synchronizing linkage of office chair, bracket including pedestal, to connect seat, to connect the chair back Wraping plate and at least one crank, be fixed with a lug extended downwardly on the bottom surface of pedestal, the both ends of crank respectively with Bracket front part, the lug of pedestal are hinged, and the wraping plate is linked together with crank；It is equipped between rear bracket part and pedestal to support Frame rear portion carries out the sliding slot guiding mechanism of lifting guidance；Wraping plate is rotated to there is larger or smaller tilt angle relative to vertical line When, so that the front of bracket rises or falls simultaneously with rear portion.

Preferably, the pedestal includes bottom plate and the side plate that upwardly extends along bottom plate two sides, the whole height of side plate For 3-5cm.Individually lug attached with pedestal is hinged by the lower end hinge joint of crank for the utility model, so as to reduce pedestal Body height, reduce overall weight so that device more lightweight, miniaturization.

Preferably, being fixed with connecting plate below base end face, the lug is rolled over downwards by connection board ends It is curved to form.Such mode is easy to process, connects also more convenient.

Preferably, the connecting plate is bonded with base end face and is welded and fixed or is fixed by fastener.Fastener Screw or pin etc. can be used.

Preferably, the lug is integrally formed with bottom plate or side plate.Can make in this way it is more aesthetically pleasing, processing more It is convenient.

Preferably, being additionally provided with the casing for grafting support rod on pedestal, the casing is threaded through base end face It is fixed in upper preset hole and with tube chamber welds with base, is externally provided with reinforcing member in casing.

Preferably, the reinforcing member is tapered collar, the tapered collar is set in outside casing and tapered collar The one end being relatively large in diameter contacts and is welded and fixed with base end face.Tapered collar can increase the contact area with pedestal, so that Casing obtains strong support in radial direction.

Preferably, the whole height of side plate is 3.5-4.5cm.The body height of pedestal is maintained at 3.5-4.5cm, can be with Pedestal weight is effectively reduced, device more minimizes.

Preferably, the length that casing is exposed to pedestal outer bottom is greater than the length that casing is exposed to pedestal inner bottom surface, cone Shape lantern ring is arranged on the outer bottom of pedestal.Casing can not excessively occupy space in pedestal in this way, advantageously reduce pedestal master Body, that is, side plate height while base body reduces height, and can satisfy the grafting intensity of support rod.

Preferably, the lug is formed by a part of downward bending being cut on side plate.Lug has drawn from side Plate, compare connecting plate scheme, more can reduce pedestal weight.

It is using the design starting point, theory and beneficial effect of the utility model of above-mentioned technical proposal:

The synchronizing device of the utility model can make chair back-rest inclination restoring force have corresponding matching according to human body weight, so that nothing It can easily reclining reply stand up by the light or heavy people of weight.

The utility model is hinged with bracket front part by crank, and crank is linked together with wraping plate, and rear bracket part is led by sliding slot Draw mechanism and base engagement；Not only to have simplified components, structure is more simple, so that wraping plate is equipped with longer Lever arm, when the chair back is toppled over backward, the power acted on the chair back is transferred to crank by wraping plate, along with the human body of seat front Leg weight is less than weight at the buttocks at seat rear portion, so not only making the load acted on the chair back smaller, and in front of seat It is easy to be lifted, user very effective can configure the effective comfortable posture for being suitable for itself.

Further say, since the swinging track of crank is a camber line, the motion profile at sliding slot close to straight line, gain Close to straight line, such seat activity has emergency variation when lifting for activity, i.e., upwardly and rearwardly moves the linear work for non-direct proportion It is dynamic；The utility model crank is preceding, and sliding slot is rear, and such sliding slot is closer to human buttock, i.e., closer to center of gravity.In overall mechanism When movable, gravity center of human body is straight with gain, mitigates, steadily moves backward upwards, and emergency can be overcome to change bring center of gravity It lifts and is not suitable with sense caused by velocity variations, the intuitional and experiential thinking is more natural, and comfort is more preferable.

Furthermore the hinge joint of crank lower end, that is, crank and pedestal is the rotation center of the whole chair back, and chair back center of gravity is in rotation Turn the back upper place at center, chair back center of gravity is backward downwards in the activity of swing arm camber line when reclining；The utility model synchronizing device is by crank It is arranged before sliding slot, more hypsokinesis when behind gain is arranged in rotation center crank compared with chair back center of gravity line slope, exists in this way When reclining, less, more difficult generation chopping when the horizontal anomalous movement distance of chair back center of gravity backward is compared to behind crank setting gain； Chair back center of gravity backward horizontal anomalous movement distance compared to crank setting gain behind when it is less, the downward Vertical movements of chair back center of gravity away from More when from compared to behind crank setting gain, i.e., chair back center of gravity is lower and closer to base center, and monolithic seat stability is more It is good.

Further to say, the back seat synchronizing linkage of the utility model has the advantages that lightweight, at low cost again simultaneously, The device not only reduces the body height and weight of pedestal, simplifies understructure, additionally it is possible to meet crank gradient, make chair Seat can achieve preset raising height, while also meet the bonding strength of support rod.

Detailed description of the invention

Fig. 1 is the schematic illustration of the utility model in the initial state in embodiment；

Fig. 2 is schematic illustration of the utility model bracket (seat) in lifting status in embodiment；

Fig. 3 is the three-dimensional viewpoin schematic diagram of the utility model entirety, while illustrating when not lifting in unlocked shape State；

Fig. 4 is the overall schematic that the utility model is in the lock state when not lifting under Fig. 3 angle；

Fig. 5 is the partial schematic diagram that the utility model is in unlocked state in the initial state；

Fig. 6 is the partial schematic diagram in unlocked state of the utility model another angle in the initial state；

Fig. 7 is the partial schematic diagram that the utility model is in the lock state in the initial state；

Fig. 8 is the utility model partial schematic diagram that another angle is in the lock state in the initial state；

Fig. 9 is the partial schematic diagram that the utility model is in unlocked state under lifting status；

Figure 10 is the partial schematic diagram that the utility model another angle under lifting status is in unlocked state；

Figure 11 is the partial schematic diagram that the utility model is in the lock state under lifting status；

Figure 12 is the utility model partial schematic diagram that another angle is in the lock state under lifting status；

Figure 13 is that spring is in the schematic diagram of uncompressed state to the utility model in the initial state in embodiment；

Figure 14 is that spring is in the schematic diagram of compressive state to the utility model in the initial state in embodiment；

Figure 15,16 are the stereoscopic schematic diagram under a kind of two kinds of different perspectivess of understructure described in embodiment 2；

Figure 17,18 show for the solid under improved a kind of two kinds of different perspectivess of understructure described in embodiment 2 It is intended to；

Figure 19,20 are the application schematic diagram under two kinds of different perspectivess of improved understructure in embodiment 2；

Figure 21,22 are the stereoscopic schematic diagram under two kinds of different perspectivess of understructure described in embodiment 3.

Specific embodiment

In order to be more clearly understood that the above objects, features, and advantages of the utility model, with reference to the accompanying drawing and have The utility model is further described in detail in body embodiment.It should be noted that in the absence of conflict, this Shen The feature in embodiment and embodiment please can be combined with each other.

Many details are explained in the following description in order to fully understand the utility model, still, the present invention Can also be implemented using other than the one described here other modes, therefore, the protection scope of the utility model not by The limitation of following public specific embodiment.

Term "at least one" refers to one or more in the description of the present invention, unless otherwise specific limit It is fixed.Term " first ", " second ", " third " etc. are only used for the purpose of description, are not understood to indicate or imply relatively important Property.

The terms such as term " installation ", " connected ", " connection ", " fixation " shall be understood in a broad sense, for example, " connection " can be It is fixedly connected, may be a detachable connection, or be integrally connected；" connected " can be directly connected, and can also pass through centre Medium is indirectly connected.It for the ordinary skill in the art, can as the case may be or the tool of the utility model Body is explained to understand the concrete meaning of above-mentioned term in the present invention.

In the description of the utility model, it is to be understood that the orientation or positional relationship of the instructions such as term " on ", "lower" is It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate Or imply that signified device or unit must have specific direction, be constructed and operated in a specific orientation, it is thus impossible to understand For limitations of the present invention.

In the description of this specification, the description of term " specific embodiment " " embodiment 1 ", " embodiment 2 " etc. means to tie The particular features, structures, materials, or characteristics for closing embodiment or example description are contained at least one implementation of the utility model In example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or example. Moreover, the particular features, structures, materials, or characteristics of description can be in any one or more of the embodiments or examples with suitable Mode combine.

Specific embodiment of the present utility model is as follows:

Embodiment 1: defining the reference azimuth of each component of the utility model first, and the utility model is normally pacifying office chair Dress in use, the front of office chair is front end, front, and the rear of office chair include position where the chair back, wraping plate be rear end, Rear portion.

The back seat synchronizing linkage for office chair of the present embodiment, as shown in Fig. 1~Figure 14, including pedestal 1, to Connect seat bracket 2, wraping plate 3 and at least one crank 4 to connect the chair back, the upper and lower ends of crank 4 respectively with support 2 front of frame, pedestal 1 are hinged, and crank 4 is to be obliquely installed, and the wraping plate 3 is linked together with crank 4, it may also be said to wraping plate 3 and Crank 4 is integrally formed；The sliding slot guiding mechanism that lifting guidance is carried out to rear bracket part is equipped between 2 rear portion of bracket and pedestal 1 5；The rotation of wraping plate 3 to when having larger or smaller tilt angle relative to vertical line so that the front of bracket 2 and rear portion simultaneously on It rises or declines.

Specifically, as shown in Figure 3,4, the crank 4 is two, is symmetricly set on 1 two sides of pedestal；The support Frame 2 includes supporting plate 10 and the wing plate 11 extended downwardly along 10 two sides of supporting plate, and supporting plate 10 is in 4 top of pedestal 1 and crank, wing plate 11 Positioned at 4 two sides of crank；The pedestal 1 includes bottom plate 13 and the side plate 14 that upwardly extends along 13 two sides of bottom plate, and described two Crank 4 is respectively disposed at 14 outside of both side plate；4 upper end of crank is hinged by the first pin shaft 8 and 2 front of bracket, and described first Pin shaft 8 is a whole root long axis；4 lower end of crank is hinged by the second pin shaft 9 and pedestal 1；Second pin shaft 9 is wraping plate 3, crank 4 Rotation center.

The sliding slot guiding mechanism includes sliding slot 6 and guide shaft 7, and in the present embodiment, the wing plate of bracket 2 is arranged in sliding slot 6 11 rear portions, the corresponding guide shaft 7 are arranged on pedestal 1, and guide shaft 7 is a whole root long axis and guide shaft 7 is threaded through sliding slot 6 It is interior.Sliding slot 6 is the waist type groove being obliquely installed, and the inclined direction of crank 4 is opposite with the inclined direction of sliding slot 6；The crank 4 is The front is high and the back is low, and the sliding slot 6 is low early and high after.Hinge joint, the guide shaft 7 of crank 4 and 2 front of bracket be in respectively crank 4 with The front and rear sides of 1 hinge joint of pedestal.

In use, wraping plate 3 connects the chair back, bracket 2 connects seat, and user is sitting in when swinging back on seat, drives 3 edge of wraping plate Vertical line is tilted with larger angle, and guide shaft 7 is fixed, and sliding slot 6 is moved along guide shaft 7, as shown in Fig. 2, bracket 2 is risen, And the height that 2 front of bracket is risen is greater than the height that 2 rear portion of bracket is risen.

It further include having for restoring extremely bracket 2 and wraping plate 3 as shown in Figure 13,14 to assist returning to original state The elasticity reset device 12 of initial position；The elasticity reset device 12 is spring, and in the present embodiment, the spring is pressure Spring, one end of spring are constrained in the hinge joint of crank 4 Yu 2 front of bracket, and the other end of spring is constrained on pedestal 1；Specifically It says, one end of spring is connected to the first pin shaft 8, and the other end of spring is connected to guide shaft 7.When wraping plate 3 rotates backward, make the first pin Axis 8 moves closer to guide shaft 7, so that so that spring is generated compression generates elastic force.

Further say, as shown in Fig. 3-Figure 12, further include have for will carry on the back seat synchronizing linkage be maintained at it is initial or The locking mechanism of lifting status；The locking mechanism includes locking pin 15 and connection locking pin 15 and grasps to locking pin 15 The control-rod 16 of work, locking pin 15 are linked together with control-rod 16, and the both side plate 14 that the locking pin 15 is threaded through pedestal 1 is opened If first through hole 17, on the second through-hole 18, locking pin 15 has radially extended lock tongue 19 at the position of the second through-hole 18, Second through-hole 18 is communicated with the location hole 20 cooperated with lock tongue 19；On the one of crank for closing on first through hole 17 Equipped with lockhole 21, the card slot 22 cooperated with lock tongue 19,22 direction of card slot are equipped on another crank for closing on the second through-hole 18 The side opening of wraping plate 3 is in order to the insertion of lock tongue 19；Specifically, the lock tongue 19 includes that a fixation is set in locking pin 15 On lantern ring 24, extend fixture block 25, the card slot 22 of the fixture block 25 and crank along locking pin radial direction on lantern ring 24 And location hole cooperation.

When unlocked, wraping plate can be move freely with bracket, when needing wraping plate and carriage lock to original state, be passed through Control-rod 16 moves locking pin 15, as shown in Fig. 4,7,8, is inserted into 15 one end of locking pin in one crank lockhole 21, and lock tongue 19 It is inserted into the card slot 22 of location hole 20 and another crank simultaneously and realizes locking.

Under raised configuration, equally by the mobile locking pin 15 of control-rod 16, as shown in figure 11, so that 15 one end of locking pin is revealed Outside for first through hole, as shown in figure 12,19 end of lock tongue is then inserted into location hole 20, at this point, the lower edge of two cranks 4 is taken respectively On the bared end 23 and lock tongue 19 of locking pin 15, the locking under raised configuration is realized.

Embodiment 2: Figure 15,16 illustrates a kind of understructure of utility model device, and the pedestal 1 includes bottom plate 13 and along the side plate 14 that 13 two sides of bottom plate upwardly extend, the hinge joint 41 of 4 lower end of crank and pedestal 1 is in the lower end of side plate 14, In order to meet the gradient of crank, the height of side plate 14 is 8CM or more；And the casing 44 for being used for grafting support rod is arranged in pedestal It is interior, and the cuboid casing 47 by being centered around 44 surrounding of casing in pedestal is reinforced, but this may make 1 main body of pedestal Highly excessive, weight is excessive, is unfavorable for developing towards lightweight direction.

Figure 17,18 show a kind of improved understructure, and the pedestal 1 is equally including bottom plate 13 and along 13 two sides of bottom plate The whole height of the side plate 14 upwardly extended, side plate 14 is 3.5-4.5cm, is fixed with connecting plate below 1 outer bottom of pedestal 42, lug 43 is formed by 42 both ends downward bending of connecting plate, the connecting plate 42 is bonded and is welded and fixed with 1 outer bottom of pedestal Or it is fixed by fastener；The hinge joint 41 of 4 lower end of crank and pedestal 1 is on lug 43.This reduces side plates 14 The body height of height and pedestal 1, while the gradient that crank can be made to maintain like again.

It further says, the casing 44 for grafting support rod is additionally provided on pedestal 1, and the casing 44 is threaded through bottom It is welded and fixed on 1 bottom surface of seat in preset hole 45 and with pedestal 1, is externally provided with reinforcing member 46, the reinforcing member in casing 44 46 be tapered collar, and the length that casing 44 is exposed to 1 outer bottom of pedestal is greater than the length that casing 44 is exposed to pedestal inner bottom surface, cone Shape lantern ring is arranged on the outer bottom of pedestal；And one end that tapered collar is relatively large in diameter contacts and is welded and fixed with 1 bottom surface of pedestal.

Figure 19,20 show the schematic diagram that above-mentioned pedestal is applied on the utility model back seat linkage, in Figure 19,20 In, 4 lower end of crank is hinged by the second pin shaft 9 and lug 43, and crank 4 has been cutd open a part to expose lug 43.

Embodiment 3: as shown in Figure 21,22, in the present embodiment, and not set connecting plate on 1 bottom surface of pedestal, the lug 43 are integrally formed with bottom plate 13 or side plate 14；It further says, the lug 43 is by be cut on side plate 14 one Downward bending is divided to form；Other technical solutions are same as Example 2.

Claims

1. be used for office chair back seat synchronizing linkage, it is characterized in that: include pedestal, the bracket to connect seat, to Connect the chair back wraping plate and at least one crank, the both ends of crank are hinged with bracket front part, pedestal respectively, the wraping plate with Crank is linked together；The sliding slot guiding mechanism that lifting guidance is carried out to rear bracket part is equipped between rear bracket part and pedestal；It sticks up Plate is rotated to when having larger or smaller tilt angle relative to vertical line so that the front of bracket and rear portion rise simultaneously or under Drop.

2. the back seat synchronizing linkage according to claim 1 for office chair, it is characterised in that: when bracket rises, The height that bracket front part rises is greater than the height that rear bracket part rises.

3. the back seat synchronizing linkage according to claim 1 for office chair, it is characterised in that: the sliding slot draws Leading mechanism includes sliding slot and guide shaft, and sliding slot is arranged on one in rear bracket part or pedestal, the corresponding guide shaft It is arranged on another in pedestal or rear bracket part, guide shaft is threaded through in sliding slot.

4. the back seat synchronizing linkage according to claim 3 for office chair, it is characterised in that: before crank and bracket Hinge joint, the guide shaft in portion are in the front and rear sides of crank Yu pedestal hinge joint respectively.

5. the back seat synchronizing linkage according to claim 3 for office chair, it is characterised in that: sliding slot is that inclination is set The waist type groove set, the inclined direction of crank and the inclined direction of sliding slot are opposite.

6. the back seat synchronizing linkage according to claim 5 for office chair, it is characterised in that: the crank is The front is high and the back is low, and the sliding slot is low early and high after.

7. the back seat synchronizing linkage according to claim 1 for office chair, it is characterised in that: the crank is Two, it is symmetricly set on pedestal two sides.

8. the back seat synchronizing linkage according to claim 7 for office chair, it is characterised in that: the bracket packet The wing plate for including supporting plate and extending downwardly along supporting plate two sides, supporting plate are in above pedestal and crank, and wing plate is located at crank two sides.

9. the back seat synchronizing linkage according to claim 1 for office chair, it is characterised in that: further include being used for Bracket and wraping plate are restored to the elasticity reset device of initial position.

10. the back seat synchronizing linkage according to claim 9 for office chair, it is characterised in that: the elasticity Resetting apparatus is spring.

11. the back seat synchronizing linkage according to claim 10 for office chair, it is characterised in that: the spring For pressure spring, one end of spring is constrained in the hinge joint of crank and bracket front part, and the other end of spring is constrained on pedestal.

12. the back seat synchronizing linkage according to claim 11 for office chair, it is characterised in that: the sliding slot Guiding mechanism includes sliding slot and guide shaft, and guide shaft is threaded through pedestal two sides, and sliding slot is arranged on bracket, and the other end of spring is constrained in On guide shaft.

13. the back seat synchronizing linkage according to claim 1 for office chair, it is characterised in that: further include useful Initial or lifting status locking mechanism is maintained in seat synchronizing linkage will be carried on the back.

14. the back seat synchronizing linkage according to claim 13 for office chair, it is characterised in that: the pedestal Including bottom plate and the side plate upwardly extended along bottom plate two sides, the crank is two, and is respectively disposed on the outside of both side plate；Institute The locking mechanism stated includes locking pin and connection locking pin and the control-rod operated to locking pin, the locking pin are worn On the first through hole that both side plate opens up, the second through-hole, locking pin has radially extended lock tongue at the position of the second through-hole, Second through-hole is communicated with the location hole with lock tongue cooperation；Crank is equipped with lockhole wherein, on another crank Equipped with the card slot cooperated with lock tongue；Under original state, by the mobile locking pin of control-rod, locking pin one end is made to be inserted into a crank lock In hole, and lock tongue is inserted into the card slot of location hole and another crank simultaneously and realizes locking；Under raised configuration, equally pass through control-rod Mobile locking pin, so that locking pin one end is exposed to outside first through hole, positioning hole is then inserted into lock tongue end, at this point, two cranks Lower edge ridden on the bared end and lock tongue of locking pin respectively, realize raised configuration under locking.

15. the back seat synchronizing linkage according to claim 14 for office chair, it is characterised in that: the lock tongue Including a fixed lantern ring being set on locking pin, extend fixture block, the fixture block along locking pin radial direction on lantern ring Cooperate with the card slot and location hole of crank.

16. the back seat synchronizing linkage according to claim 1 for office chair, it is characterised in that: crank passes through the One pin shaft and bracket front part are hinged, and first pin shaft is a whole root long axis.

17. be used for office chair back seat synchronizing linkage, it is characterized in that: include pedestal, the bracket to connect seat, to The wraping plate and at least one crank for connecting the chair back, are fixed with a lug extended downwardly on the bottom surface of pedestal, and the two of crank End is hinged with the lug of bracket front part, pedestal respectively, and the wraping plate is linked together with crank；Between rear bracket part and pedestal Equipped with the sliding slot guiding mechanism for carrying out lifting guidance to rear bracket part；Wraping plate rotates larger or smaller to having relative to vertical line When tilt angle, so that the front of bracket rises or falls simultaneously with rear portion.

18. the back seat synchronizing linkage according to claim 17 for office chair, it is characterised in that: the pedestal Including bottom plate and the side plate upwardly extended along bottom plate two sides, the whole height of side plate is 3-5cm.

19. the back seat synchronizing linkage according to claim 18 for office chair, it is characterised in that: in base end face Lower section is fixed with connecting plate, and the lug is formed by connection board ends downward bending.

20. the back seat synchronizing linkage according to claim 19 for office chair, it is characterised in that: the connection Plate is bonded with base end face and is welded and fixed or is fixed by fastener.

21. the back seat synchronizing linkage according to claim 17 for office chair, it is characterised in that: the lug It is to be integrally formed with bottom plate or side plate.

22. the back seat synchronizing linkage according to claim 17 for office chair, it is characterised in that: on pedestal also Equipped with the casing for grafting support rod, the casing is threaded through on base end face in preset hole and consolidates with tube chamber welds with base It is fixed, reinforcing member is externally provided in casing.

23. the back seat synchronizing linkage according to claim 22 for office chair, it is characterised in that: the reinforcing Part is tapered collar, and the tapered collar is set in one end that outside casing and tapered collar is relatively large in diameter and contacts with base end face And it is welded and fixed.

24. the back seat synchronizing linkage according to claim 17 for office chair, it is characterised in that: the sliding slot Guiding mechanism includes sliding slot and guide shaft, and sliding slot is arranged on one in rear bracket part or pedestal, and corresponding described leads Axis is arranged on another in pedestal or rear bracket part, and guide shaft is threaded through in sliding slot.

25. the back seat synchronizing linkage according to claim 17 for office chair, it is characterised in that: further include useful Initial or lifting status locking mechanism is maintained in seat synchronizing linkage will be carried on the back.

26. the back seat synchronizing linkage according to claim 25 for office chair, it is characterised in that: the pedestal Including bottom plate and the side plate upwardly extended along bottom plate two sides, the crank is two, and is respectively disposed on the outside of both side plate；Institute The locking mechanism stated includes locking pin and connection locking pin and the control-rod operated to locking pin, the locking pin are worn On the first through hole that both side plate opens up, the second through-hole, locking pin has radially extended lock tongue at the position of the second through-hole, Second through-hole is communicated with the location hole with lock tongue cooperation；Crank is equipped with lockhole wherein, on another crank Equipped with the card slot cooperated with lock tongue；Under original state, by the mobile locking pin of control-rod, locking pin one end is made to be inserted into a crank lock In hole, and lock tongue is inserted into the card slot of location hole and another crank simultaneously and realizes locking；Under raised configuration, equally pass through control-rod Mobile locking pin, so that locking pin one end is exposed to outside first through hole, positioning hole is then inserted into lock tongue end, at this point, two cranks Lower edge ridden on the bared end and lock tongue of locking pin respectively, realize raised configuration under locking.

27. the back seat synchronizing linkage according to claim 26 for office chair, it is characterised in that: the lock tongue Including a fixed lantern ring being set on locking pin, extend fixture block, the fixture block along locking pin radial direction on lantern ring Cooperate with the card slot and location hole of crank.

28. the back seat synchronizing linkage according to claim 18 for office chair, it is characterised in that: the entirety of side plate Height is 3.5-4.5cm.

29. the back seat synchronizing linkage according to claim 23 for office chair, it is characterised in that: casing is exposed to The length of pedestal outer bottom is greater than the length that casing is exposed to pedestal inner bottom surface, and tapered collar is arranged on the outer bottom of pedestal.

30. the back seat synchronizing linkage according to claim 21 for office chair, it is characterised in that: the lug It is to be formed by a part of downward bending being cut on side plate.