CN211862335U - Revolving chair - Google Patents

Abstract

The utility model relates to a swivel chair. It has solved the little scheduling problem of prior art application scope. This swivel chair is including the seat support of taking bracket mechanism, and connect the chair foot at seat support bottom surface center, rear side at the seat support is connected with the back subassembly, the back subassembly includes fixed support frame and fixes the back frame on fixed support frame, the horizontal middle part at the back frame in top of fixed support frame, be equipped with the waist that is located the back frame at the top of fixed support frame and lean on, it is equipped with T shape waist frame and be equipped with the position control mechanism who is used for adjusting T shape waist and leans on the vertical high position of frame to be close to human surface at the top of fixed support frame, waist is leaned on and T shape waist leans on the frame front and back interval distribution, back frame top is connected with the headrest support through lift control mechanism, the top that supports at the headrest is connected with the headrest frame through rotating control mechanism. The utility model has the advantages that: the application range is expanded.

Description

Revolving chair

Technical Field

The utility model belongs to the technical field of the thing to sit on, especially, relate to a swivel chair.

Background

The development of the swivel chair improves the comfort of the user, and particularly can greatly improve the use convenience by means of a roller moving mode. In a swivel chair, a backrest of the swivel chair, which can provide a back support to a user to improve the comfort of use. The existing backrest is of a frame structure, a waist rest can be arranged on the backrest, and the waist rest can further improve the waist comfort of a user. However, the waist rest of the existing backrest cannot be adjusted in height and position in the vertical direction, and the application range of the swivel chair is reduced due to the fact that the waist rest cannot be adjusted; secondly, it can't carry out the upset regulation around according to head circumference diameter size of headrest cushion, and above problem leads to it can't satisfy different users ' operation requirement of swivel chair.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above problem, provide a swivel chair that can enlarge application scope.

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

this swivel chair is including the seat support of taking bracket mechanism, and connect the chair foot at seat support bottom surface center, rear side at the seat support is connected with the back subassembly, the back subassembly includes fixed support frame and fixes the back frame on fixed support frame, the horizontal middle part at the back frame in top of fixed support frame, be equipped with the waist that is located the back frame at the top of fixed support frame and lean on, it is equipped with T shape waist frame and be equipped with the position control mechanism who is used for adjusting T shape waist and leans on the vertical high position of frame to be close to human surface at the top of fixed support frame, waist is leaned on and T shape waist leans on the frame front and back interval distribution, back frame top is connected with the headrest support through lift control mechanism, the top that supports at the headrest is connected with the headrest frame through rotating control mechanism.

In foretell swivel chair, position adjustment mechanism including setting up the position adjustment waist hole at T shape waist and leaning on the frame vertical section center, be equipped with the regulation slip post and adjust the slip post and keep away from the one end of fixed support frame and insert in the position adjustment waist hole near human one side at the top of fixed support frame, still include the position control piece, the position control piece passes through the bolt fastening and adjusts the slip post and keep away from the one end of fixed support frame and the position control piece with the restriction of T shape waist and lean on the frame between the top of position control piece and fixed support frame, be equipped with vertical guide structure between position control piece and T shape waist and lean on the frame vertical section to and be equipped with the position locking structure of leaning on frame position locking with T shape between position control piece and T shape waist and lean on the frame vertical section.

In the swivel chair, the vertical guide structure comprises guide convex strips arranged on two sides of a position adjusting waist hole close to an orifice of the position adjusting block, the two guide convex strips are parallel to each other, one surface of the position adjusting block close to the position adjusting waist hole is provided with a guide convex part protruding towards the position adjusting waist hole side, the guide convex part is positioned between the two guide convex strips, and the vertical two sides of the guide convex part are respectively in one-to-one sliding connection with the guide convex strips; the vertical guide structure further comprises a guide waist hole which is arranged in the position adjusting waist hole and is far away from one end of the position adjusting block, one end of the adjusting sliding column, which is far away from the fixed supporting frame, is connected with a waist-shaped head, the waist-shaped head is inserted into the position adjusting waist hole, and one end face, which is connected with the waist-shaped head, of the adjusting sliding column is matched with the bottom face of the hole of the guide waist hole.

In foretell swivel chair, position locking structure include two locking sand grips, one of them locking sand grip is located the outside of one of them direction sand grip, another locking sand grip is located the outside of another direction sand grip, locking sand grip and direction sand grip be parallel to each other, be equipped with a plurality of interval evenly distributed's arc locking groove in proper order on every locking sand grip respectively, the one side both ends that are equipped with the direction convex part at position control block still are connected with the locking convex part respectively, at least one arc locking groove on one of them locking sand grip is blocked to one of them locking convex part, in at least one arc locking groove on another locking sand grip is blocked to another one locking convex part, be equipped with the arc convex surface respectively on every locking convex part and arc convex surface and arc locking groove phase-match.

In the swivel chair, the upper side of the middle position of the waist rest is provided with a vertical pressure reducing groove and two lateral pressure reducing grooves communicated with the lower end of the vertical pressure reducing groove, and the two lateral pressure reducing grooves are communicated to form a U-shaped groove.

In the swivel chair, two sides of the lower end of the backrest outer frame are provided with positioning steps, two sides of the upper end of the fixed supporting frame are respectively fixed on the positioning steps, the inner sides of the upper ends of the fixed supporting frame are respectively provided with a positioning lug, and a first fastening piece which is arranged on the positioning lug in a penetrating way is connected with a screw hole on the inner side of the lower end of the backrest outer frame in a threaded way; and a second fastening piece is arranged at the lower end of the backrest outer frame in a penetrating manner and is in threaded connection with a threaded hole in the middle of the fixed supporting frame.

In the swivel chair, the lifting control mechanism comprises a cylindrical mounting seat fixed on the lower surface of the top of the backrest outer frame, the headrest support is inserted into the cylindrical mounting seat, one side of the cylindrical mounting seat close to the human body is provided with an elastic lock catch, one side of the headrest support close to the human body is provided with a plurality of lock catch grooves which are sequentially distributed at intervals along the length direction of the headrest support, and the elastic lock catch is buckled in any lock catch groove; the headrest support is also provided with an upper limiting convex part and a lower limiting convex part on one side surface provided with a lock catch groove, and the lock catch groove is positioned between the upper limiting convex part and the lower limiting convex part.

In foretell swivel chair, rotation control mechanism including wearing to establish the hinge at headrest support top, the lower extreme of headrest frame is equipped with two relative hinge axle seats, the headrest supports the top and is located between two hinge axle seats and the both ends of hinge wear to establish on the hinge axle seat one by one, support the top at the headrest and be equipped with the arc convex surface and set up on the arc convex surface and along a plurality of locking control arch of arc convex surface width direction setting, be equipped with the arc cantilever spring bolt that is located two hinge axle seats and is close to human one side top at the lower extreme of headrest frame, the interior arc concave surface of arc cantilever spring bolt is located arc convex surface top and is equipped with a plurality of locking control grooves that set up along interior arc concave surface width direction interval in proper order on the interior arc concave surface, locking control arch card goes into in arbitrary locking control groove.

In the swivel chair, the transverse part of the T-shaped lumbar support is of an arc structure, the lumbar support is of an arc structure, and the arc radius of the transverse part of the T-shaped lumbar support is larger than that of the lumbar support.

In the swivel chair, the chair seat comprises a seat surface, a base arranged at the bottom of the seat surface and the leg rest mechanism arranged on the base, wherein the leg rest mechanism comprises at least one group of slide rail assemblies, a fixing piece used for detachably connecting the slide rail assemblies with the base and a leg rest arranged at the front end of the slide rail assemblies; the sliding rail assembly comprises a first section of sliding rail, a second section of sliding rail and a third section of sliding rail, the second section of sliding rail is sleeved outside the first section of sliding rail, the third section of sliding rail is sleeved outside the second section of sliding rail, the first section of sliding rail can slide along the second section of sliding rail, and the second section of sliding rail can slide along the first section of sliding rail and the third section of sliding rail; the third section of slide rail is connected with the fixing piece, a first stop component for controlling the extending length of the first section of slide rail relative to the second section of slide rail is arranged between the first section of slide rail and the second section of slide rail, and a second stop component for controlling the extending length of the second section of slide rail relative to the third section of slide rail is arranged between the second section of slide rail and the third section of slide rail; the base front end seted up with the chamber of accomodating of footrest adaptation, the base is including the seat that is located the top prop up the board and be located the seat cavity board of bottom.

In the swivel chair, the first stop assembly comprises a first linear limiting long groove and a first limiting part inserted into the first limiting long groove, the first limiting long groove and the first limiting part are respectively arranged on the first section of slide rail and the second section of slide rail, and the second stop assembly comprises a second limiting groove and a second limiting part which are matched with each other and respectively arranged on the third section of slide rail and the second section of slide rail.

In the swivel chair, the second section of slide rail and the third section of slide rail are square sleeve members, and the first section of slide rail is in a square condition matched with the pipe cavity of the second section of slide rail; the third section of slide rail is shorter than the second section of slide rail, the second limiting groove is an open groove with an open rear end, and the second limiting part is arranged on the second slide rail and can slide into the second limiting groove when the second section of slide rail and the third section of slide rail slide relatively.

In the swivel chair, the first stopping assembly is arranged on the side parts of the first section of slide rail and the second section of slide rail, and the second stopping assembly is arranged on the top or the bottom of the second section of slide rail.

In the swivel chair, the slide rail assemblies are oppositely arranged in two groups, and the fixing part comprises two fixing plates which are fixedly connected with the two third-section slide rails respectively and provided with mounting through holes and a fixing strip connected between the two fixing plates.

In the swivel chair, the fixed plate is integrally connected with the fixed strip, the fixed plate is welded with the third section of slide rail, and the fixed plate and the fixed strip are both provided with reinforcing ribs protruding upwards or downwards from the body; the fixing plate is connected with one side edge of the fixing strip and is an arc-shaped edge bent downwards, the fixing strip is at least connected with part of the arc-shaped edge, and the upper surface of the fixing strip is lower than that of the third section of sliding rail.

In foretell swivel chair, be equipped with between fagging and the seat cavity board and be used for the installation the seat cavity of slide rail set spare and mounting, be equipped with the slide rail mounting groove in the seat cavity, the fixed plate spacing groove has been seted up on the arc border, the seat cavity erect be equipped with the spacing post of fixed plate spacing groove adaptation, still be connected with between fixed plate and the base and wear to locate connecting stud in the installation through-hole.

In the swivel chair, the footrest is internally provided with a mounting seat groove with an opening at the rear end and the top, and the front end of the third section of sliding rail is hinged in the mounting seat groove; the footrest includes backup pad and panel, the footrest by the backward preceding thickness diminish gradually, and can wind with the pin joint upset that third section slide rail is articulated makes the panel up, the backup pad down, the thickness portion of footrest becomes in the front simultaneously, book portion becomes lean on behind on the slide rail set spare.

In the swivel chair, when the footrest is accommodated in the accommodating cavity, the upper surface of the supporting plate is matched with the plane radian of the seat support plate, and the hinge point of the third section of sliding rail and the footrest is positioned at the rear part of the footrest.

In foretell swivel chair, the panel is the gentle face that closes of edge arc transition, still be equipped with the pull of being convenient for on the panel the draw-out groove or the pull arch of footrest, the mount pad groove is that the short longitudinal section is triangular's seat groove before the back height.

Compared with the prior art, the utility model has the advantages of:

1. the waist rest position adjustment can be realized, so that the use requirements of different users on different waist rest positions are met, and the application range and the practicability are further expanded.

2. Can realize the headrest frame in the height of vertical direction, secondly, thereby the rotation through the headrest frame can realize the regulation of headrest frame front and back angular position, promptly, the locking control arch can go into different locking control groove in order to realize rotating the fixed locking of back position more, can further improve the practicality.

3. Through the slide rail structure of syllogic, not only can realize longer bracket mechanism extensible length under the restriction of limited seat support depth length, also reduced the requirement to seat support bottom installation space size simultaneously, can be applied to in more seat designs and do not influence the whole aesthetic property of whole chair as far as possible. The utility model provides a slide rail set spare hides in the seat intracavity, and it is better to install back stability, reliability, uses safelyr and the wholeness of seat support stronger, has combined the slide rail of syllogic moreover to make slide rail set spare can conveniently hide in the limited seat intracavity in space.

4. The footrest can be docile arrange in when not using accomodate the intracavity and can not overturn by the restriction of seat bracing piece, and it is integrated with whole seat support, can guarantee again to shelve the travelling comfort on it better through upset back foot when the footrest is taken out the use, can not knock over the leg foot. And the included angle between the big foot and the shank feels comfortable relatively at the included angle of 3-5 degrees when having a rest, and the footrest of this application can reach this comfortable angle after the upset, and different individualities also can adjust the footrest angle of turning over a little according to individual's demand in real time after putting on the footrest in order to reach the most comfortable body and feel.

Drawings

Fig. 1 is a schematic structural view of a backrest assembly provided by the present invention.

Fig. 2 is a schematic view of the swivel chair with another viewing angle of the backrest module according to the present invention.

Fig. 3 is a schematic view of the connection structure of the fixing support frame and the T-shaped waist support frame provided by the present invention.

Fig. 4 is a schematic view of the lumbar support structure provided by the present invention.

Fig. 5 is a schematic structural view of the fixing support frame provided by the present invention.

Fig. 6 is a schematic structural diagram of the position adjusting block provided by the present invention.

Fig. 7 is a schematic view of the headrest and the headrest support connection structure provided by the present invention.

Fig. 8 is a schematic structural diagram of the lifting control mechanism provided by the present invention.

Fig. 9 is a schematic view of the headrest structure provided by the present invention.

Fig. 10 is a schematic view of a two-step structure of the lower side of the backrest frame according to the present invention.

Fig. 11 is a schematic view of the chair seat structure provided by the present invention.

Fig. 12 is a schematic view of a partial structure of a chair seat according to the present invention.

Fig. 13 is a schematic view of a partial structure of a seat of the present invention.

Fig. 14 is a schematic view of a partial structure of a seat provided by the present invention.

Fig. 15 is a schematic view of a local structure of a chair seat provided by the present invention.

Fig. 16 is a schematic view of a partial structure of a seat provided by the present invention.

Fig. 17 is a schematic view of the swivel chair structure provided by the present invention.

In the figure, a fixed supporting frame a1, a positioning lug a11, a first fastener a12, a backrest outer frame a2, a second fastener a21, a cylindrical mounting seat a22, an elastic lock catch a23, a lumbar support a3, a vertical decompression groove a31, a lateral decompression groove a32, a T-shaped lumbar support a4, a position adjusting lumbar hole a41, an adjusting sliding column a42, a position adjusting block a43, a locking convex part a430, a guide convex part a44, a guide convex part a45, a guide lumbar hole a46, a lumbar head a47, a locking convex part a48, an arc locking groove a480, a connecting structure a5, a headrest support a6, a lock catch groove a61, an upper limit convex part a62, a lower limit convex part a63, a hinge shaft a64, an arc convex surface a65, a lock control convex part a66, a headrest frame a7, a hinge shaft seat a71, an arc cantilever a72 and a lock tongue 73 are included.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 11-17, the swivel chair comprises a seat b with a leg rest mechanism, specifically, the seat b comprises a seat surface 1, a base 2 arranged at the bottom of the seat surface, and the leg rest mechanism arranged on the base, wherein the leg rest mechanism comprises at least one set of slide rail assemblies, a fixing member 3 for detachably connecting the slide rail assemblies with the base, and a leg rest 5 arranged at the front end of the slide rail assemblies; the slide rail assembly comprises a first section of slide rail 41, a second section of slide rail 42 and a third section of slide rail 43, the second section of slide rail is sleeved outside the first section of slide rail, the third section of slide rail is sleeved outside the second section of slide rail, the first section of slide rail can slide along the second section of slide rail, and the second section of slide rail can slide along the first section of slide rail and the third section of slide rail; the third section of slide rail is connected with the fixing piece, a first stop component for controlling the extending length of the first section of slide rail relative to the second section of slide rail is arranged between the first section of slide rail and the second section of slide rail, and a second stop component for controlling the extending length of the second section of slide rail relative to the third section of slide rail is arranged between the second section of slide rail and the third section of slide rail; the base front end seted up with the chamber 21 is accomodate to the footrest adaptation, the base is including the seat stay board 24 that is located the top and the seat cavity board 25 that is located the bottom.

The slide rail structure of syllogic not only can realize longer bracket mechanism extensible length under the restriction of limited seat support depth length, has also reduced the requirement to seat support bottom installation space size simultaneously, can be applied to in more seat designs and does not influence the whole aesthetic property of whole chair as far as possible.

Furthermore, the first position-stopping assembly comprises a first linear position-limiting long groove 61 and a first position-limiting part 62 inserted into the first position-limiting long groove, the first position-limiting long groove and the first position-limiting part are respectively arranged on the first section of slide rail and the second section of slide rail, and the second position-stopping assembly comprises a second position-limiting groove 63 and a second position-limiting part 64 which are matched with each other and respectively arranged on the third section of slide rail and the second section of slide rail. Secondly, the second section of slide rail and the third section of slide rail are square sleeve parts, and the first section of slide rail is in a square condition matched with the pipe cavity of the second section of slide rail; the third section of slide rail is shorter than the second section of slide rail, the second limiting groove is an open groove with an open rear end, and the second limiting part is arranged on the second slide rail and can slide into the second limiting groove when the second section of slide rail and the third section of slide rail slide relatively. The third section of slide rail mainly plays a role in sleeving and positioning the whole set of slide rail, the structure can be shortened on the premise of ensuring the stability, materials are saved, the weight is reduced, and the occupied volume is reduced.

In addition, the first stopping component is arranged on the side parts of the first section of slide rail and the second section of slide rail, and the second stopping component is arranged on the top or the bottom of the second section of slide rail.

The arrangement of the stop assembly ensures that the sliding rail assembly can be stably and effectively drawn and pulled for a long time, and the sliding rail assembly is good in structural stability and more comfortable to use.

As a preferred scheme of this embodiment, the slide rail assemblies are two sets of oppositely disposed slide rail assemblies, and the fixing member includes two fixing plates 31 fixedly connected to the two third-stage slide rails respectively and provided with mounting through holes 311, and a fixing strip 32 connected between the two fixing plates.

The fixed plate is integrally connected with the fixed strip, the fixed plate is welded with the third section of slide rail, and the fixed plate and the fixed strip are both provided with reinforcing ribs 33 protruding upwards or downwards from the body; the fixing plate is connected with one side edge of the fixing strip and is an arc-shaped edge bent downwards, the fixing strip is at least connected with part of the arc-shaped edge, and the upper surface of the fixing strip is lower than that of the third section of sliding rail.

The structural stability of above-mentioned mounting is good, and one set of mounting can be shared to two sets of slide rail set spares, and can fix a position between two sets of slide rail set spares and fix a position and assemble with the seat support again, and it is more accurate to install more convenient while location.

Be equipped with between current fagging and seat cavity plate and be used for the installation the seat chamber of slide rail set spare and mounting, be equipped with slide rail mounting groove 22 in the seat chamber, fixed plate spacing groove 34 has been seted up on the arc border, the seat intracavity erect be equipped with the spacing post 23 of fixed plate spacing groove adaptation, still be connected with between fixed plate and the base and wear to locate connecting stud 35 in the installation through-hole. The slide rail set spare of this embodiment hides in the seat intracavity, and good back stability, reliability are better after installing, and the wholeness of using safer and seat support is stronger, has combined the slide rail of syllogic moreover to make slide rail set spare can conveniently hide in the limited seat intracavity in space.

In addition, an installation seat groove 51 with an opening at the rear end and the top is formed in the footrest, and the front end of the third section of sliding rail is hinged in the installation seat groove; the footrest comprises a support plate 52 and a face plate 53, the thickness of the footrest gradually decreases from back to front, and the footrest can be overturned around a hinge point hinged with the third section of slide rail to enable the face plate to face upwards and the support plate to face downwards, and meanwhile, the thick part of the footrest becomes in front and the thin part becomes to lean against the slide rail assembly backwards.

When the footrest is put into the containing cavity, the upper surface of the supporting plate is matched with the plane radian of the seat supporting plate, and the hinge point of the third section of sliding rail and the footrest is positioned at the rear part of the footrest.

Further, the panel is the gentle face that closes of edge arc transition, still be equipped with the pull of being convenient for on the panel the draw groove or the pull arch 54 of footrest, the mount pad groove is the seat groove that the short longitudinal section is triangle-shaped behind the high front. The triangular seat groove enables the mounting seat groove to be high in fitting degree with the first section of the sliding rail, and the supporting is more stable. Can set up the articulated of taking the damped articulated between mount pad groove and the first section slide rail during the design, can conveniently rotate the footrest like this, also can carry out random position location to the footrest simultaneously to anti-collision, and also convenient to use person is upset at will and is controlled, leans on in the body sense to go also more to step on really, comfortable.

The arrangement of the structure ensures that the footrest can be attached when not in use, is placed in the storage cavity and can not be overturned due to the limitation of the seat supporting plate, is integrated with the whole seat, and can ensure that the footrest can be better comfortable when being taken out for use through overturning the rear feet and can not knock the legs. And the included angle between the big foot and the shank is relatively comfortable at the included angle of 3-5 degrees body sensing when having a rest, and the footrest of this embodiment can reach this comfortable angle after the upset, and different individualities also can adjust the footrest angle of turning over a little according to individual's demand in real time after putting on the footrest in order to reach the most comfortable body sensing simultaneously.

As shown in fig. 17, the swivel chair further includes a leg a8 connected to the center of the bottom surface of the seat, the leg a8 is a five-wheeled chair leg connected to the center of the lower surface of the base 2, and the chair leg has a lifting function, which is a commercially available product, and the structure of the swivel chair is not further described in this embodiment.

Secondly, handrails (not shown) are installed on both sides of the base 2, and the two handrails are symmetrically distributed. The handrail belongs to prior art, and this application is not being further repeated its structure.

As shown in figures 1, 2, 5 and 10,

a backrest assembly a is connected to the rear side of the seat, the backrest assembly comprises a fixed supporting frame a1 and a backrest outer frame a2 fixed on the fixed supporting frame a1, specifically, two sides of the lower end of the backrest outer frame a2 are provided with positioning steps, two sides of the upper end of the fixed supporting frame a1 are respectively fixed on the positioning steps, the inner sides of the upper ends of the fixed supporting frame a1 are respectively provided with positioning lugs a11, a fastener a12 penetrating through the positioning lugs a11 is provided, a fastener a12 is in threaded connection with screw holes on the inner side of the lower end of the backrest outer frame a2, and a fastener a12 is in threaded connection with the screw holes on the inner side of the lower end of the backrest outer frame a2 from the radial direction of the fixed supporting frame a 1;

a second fastener a21 is arranged at the lower end of the outer backrest frame a2 in a penetrating way, and the second fastener a21 is in threaded connection with a threaded hole in the middle of the fixed supporting frame a 1. The second fastener a21 is connected to the back frame a2 from the thickness direction of the fixing support frame a 1.

The fasteners are bolts or the like.

The top of the fixed support frame a1 is transversely arranged at the middle part of the backrest outer frame a2, and the combination mode can reinforce the structure and simultaneously facilitate the installation and fixation of the lumbar support.

As shown in fig. 1 to 4, a lumbar support a3 positioned in the backrest outer frame a2 is provided at the top of the fixed support frame a1, a vertical pressure reduction groove a31 is provided at the upper side of the middle position of the lumbar support a3 in order to improve the elasticity of the lumbar support, and two lateral pressure reduction grooves a32 communicated with the lower end of the vertical pressure reduction groove a31 are provided, and the two lateral pressure reduction grooves a32 are communicated to form a U-shaped groove. The vertical pressure relief groove a31 has a groove width equal to the groove width of the lateral pressure relief groove a32, which may facilitate manufacturing. The waist is by plastics material manufacturing, can further promote the elasticity performance of waist by self through designing the relief groove, can further promote and use the travelling comfort.

Also, the lumbar support a3 has an arc-shaped structure in a cross-section in a width direction of the back frame a2, which is curved toward a human body side, and has an arc-shaped structure in a cross-section in a length direction of the back frame a2, so as to provide a lumbar support.

A T-shaped lumbar support a4 is provided on a top portion of the fixed support frame a1 near one surface of the human body, a transverse portion of the T-shaped lumbar support a4 is of an arc-shaped structure, and an arc radius of a transverse portion of the T-shaped lumbar support a4 is larger than an arc radius of the lumbar support a3 (that is, the lumbar support is of an arc-shaped structure transversely along a cross section in the width direction of the backrest outer frame), and a position adjusting mechanism for adjusting the vertical height position of the T-shaped lumbar support a4 is provided between the fixed support frame a1 and the T-shaped lumbar support a4, and specifically, the position adjusting mechanism includes a position adjusting lumbar hole a41 provided at the center of the vertical section of the T-shaped lumbar support a4, an adjusting slide column a42 is provided on a side of the top portion of the fixed support frame a1 near the human body, and an end of the adjusting slide column a42 far from the fixed support frame a1 is inserted into the position adjusting lumbar hole a41, and further includes a position adjusting block a43, the position adjusting block a43 is fixed on an end of the adjusting slide column 42 a and the adjusting block 4642 a is limited to the position of the T-shaped A vertical guide structure is arranged between the joint block a43 and the top of the fixed support frame a1, between the position adjusting block a43 and the vertical section of the T-shaped waist rest a4, further, the vertical guide structure comprises guide convex strips a44 arranged at two sides of a position adjusting waist hole a41 close to an aperture of the position adjusting block a43, the two guide convex strips a44 are parallel to each other, one side of the position adjusting block a43 close to the position adjusting waist hole a41 is provided with a guide convex part a45 convex towards the position adjusting waist hole a41 side, the guide convex part a45 is arranged between the two guide convex strips 387a 44, and the vertical two sides of the guide convex part a45 are respectively connected with the guide convex strips a44 in a one-to-one sliding manner; the vertical guide structure further comprises a guide waist hole a46 arranged at one end of the position adjusting waist hole a41 far away from the position adjusting block a43, one end of the adjusting sliding column a42 far away from the fixed supporting frame a1 is connected with a waist-shaped head a47, the waist-shaped head a47 is inserted into the position adjusting waist hole a41, and the end face of one end of the adjusting sliding column a42 connected with the waist-shaped head a47 is matched with the hole bottom face of the guide waist hole a 46.

The center of the position adjusting block a43 is provided with a nail passing hole, one end of the nail passing hole close to the guide convex part a45 is provided with a waist-shaped hole body matched with the waist-shaped head a47, the waist-shaped hole body and the waist-shaped head a47 are mutually matched and can improve the firmness of connection of the position adjusting block a43 and the waist-shaped head a47, a screw extending into a central threaded hole of the waist-shaped head is arranged in the nail passing hole in a penetrating mode, and connection of the two parts is achieved.

As shown in fig. 4-6, and a position locking structure for locking the position of the T-shaped lumbar support frame a4 is arranged between the position adjusting block a43 and the vertical section of the T-shaped lumbar support frame a 4. Specifically, the position locking structure includes two locking ribs a48, one of which a48 is located outside one of the guide ribs a44, the other locking rib a48 is located outside the other guide rib a44, the locking rib a48 and the guide rib a44 are parallel to each other, a plurality of arc-shaped locking grooves a480 which are evenly distributed at intervals in sequence are respectively arranged on each locking convex strip a48, the central angle of each arc-shaped locking groove a480 is less than 180 degrees, the locking convex part a430 is connected with the two ends of the surface of the position adjusting block a43 provided with the guide convex part a45, one of the locking protrusions a430 is caught in at least one of the arc-shaped locking grooves a480 of one of the locking protrusions a48, the other locking protrusion a430 is caught in at least one arc-shaped locking groove a480 of the other locking protrusion a48, an arc convex surface is provided on each locking protrusion a430 and matches with the arc locking groove a 480.

The waist support a5 is connected with the waist support a3 at each end of the T-shaped waist support a4, and the waist support a3 and the T-shaped waist support a4 are arranged at intervals in the front-back direction. The connecting structure a5 comprises a first screw arranged at two corners of the upper side of the waist support a3 and a second screw arranged side by side and arranged in the middle of the lower side of the waist support a3, the first screws are in one-to-one threaded connection with threaded holes at two ends of the transverse part of the T-shaped waist support a4, and the second screws are in one-to-one threaded connection with two threaded holes at the vertical section of the T-shaped waist support a 4.

The support formed by the three-point distribution can ensure the stability of the waist support fixation, and simultaneously, can provide a stable lumbar support.

In this embodiment, the T-shaped lumbar support a4 is held by external force, so that the position of the T-shaped lumbar support a4 in the vertical direction can be adjusted, and the locking convex portion a430 gets into the different arc-shaped locking grooves a480 to adjust the position height and lock the position, that is, the position of the lumbar support can be adjusted, so that the use requirements of different users for different lumbar support positions can be met, and the application range and the practicability can be further expanded.

As shown in fig. 1 to 2 and fig. 7 to 9, a headrest support a6 is connected to the top of the backrest outer frame a2 via a lift control mechanism, and a headrest frame a7 is connected to the top of the headrest support a6 via a rotation control mechanism. Specifically, the lifting control mechanism comprises a cylindrical mounting seat a22 fixed on the lower surface of the top of a backrest outer frame a2, a headrest support a6 is inserted into the cylindrical mounting seat a22, an elastic lock catch a23 is arranged on one side, close to a human body, of the cylindrical mounting seat a22, a plurality of lock catch grooves a61 are arranged on one side, close to the human body, of the headrest support a6, the lock catch grooves a61 are sequentially distributed at intervals along the length direction of the headrest support a6, and the elastic lock catch a23 is buckled in any one lock catch groove a 61; the side surface of the headrest support a6, which is provided with the locking groove a61, is also provided with an upper limiting convex part a62 and a lower limiting convex part a63, and the locking groove a61 is positioned between the upper limiting convex part a62 and the lower limiting convex part a 63.

Secondly, the rotation control mechanism comprises a hinge shaft a64 penetrating the top of the headrest support a6, the lower end of the headrest frame a7 is provided with two opposite hinge shaft seats a71, the top of the headrest support a6 is positioned between the two hinge shaft seats a71, two ends of the hinge shaft a64 are respectively penetrated on the hinge shaft seats a71, the top of the headrest support a6 is provided with an arc convex surface a65 and a plurality of locking control protrusions a66 arranged on the arc convex surface a65 and arranged along the width direction of the arc convex surface a65, the lower end of the headrest frame a7 is provided with an arc cantilever lock tongue a72 positioned above one side of the two hinge shaft seats a71 close to the human body, the inner arc concave surface of the arc cantilever lock tongue 72 is positioned above the arc convex surface a65 and a73 arranged on the inner arc concave surface at intervals in the width direction of the inner arc concave surface, and the locking control protrusions a66 are clamped in any one locking control groove a 73.

By holding the headrest support, the height of the headrest frame a7 in the vertical direction can be achieved, i.e., the position height adjustment can be achieved by the resilient catch a23 snapping into a different catch groove a 61. Secondly, the adjustment of the front and rear angular positions of the headrest frame a7 can be achieved by the rotation of the headrest frame a7, that is, the locking control protrusion a66 can go over the different locking control groove a73 to achieve the fixed locking of the rotated position.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (9)

1. The swivel chair comprises a chair seat (b) with a leg rest mechanism, chair legs (a8) connected to the center of the bottom surface of the chair seat, and a backrest assembly (a) connected to the rear side of the chair seat, and is characterized in that the backrest assembly comprises a fixed support frame (a1) fixedly connected with the rear side of the chair seat, a backrest outer frame (a2) fixed on the fixed support frame (a1), the top of the fixed support frame (a1) is transversely arranged in the middle of the backrest outer frame (a2), a waist rest (a3) positioned in the backrest outer frame (a2) is arranged at the top of the fixed support frame (a1), a T-shaped waist rest (a4) is arranged at the top of the fixed support frame (a1) close to one surface of a human body, a position adjusting mechanism for adjusting the vertical height position of the T-shaped waist rest (a4) is arranged between the fixed support frame (a1) and the T-shaped waist rest (a4), and the position adjusting mechanism (a3) and the T-shaped waist rests (a4) are distributed at intervals in the front and back, a headrest support (a6) is connected to the top of the backrest outer frame (a2) through a lifting control mechanism, and a headrest frame (a7) is connected to the top of the headrest support (a6) through a rotation control mechanism.

2. The swivel chair according to claim 1, wherein the position adjusting mechanism comprises a position adjusting waist hole (a41) provided at the center of the vertical section of the T-shaped lumbar support (a4), an adjusting sliding post (a42) provided at the side of the top of the fixed support frame (a1) near the human body and an adjusting sliding post (a42) inserted into the position adjusting waist hole (a41) at the end of the adjusting sliding post (a42) remote from the fixed support frame (a1), a position adjusting block (a43), a position adjusting block (a43) fixed by bolts at the end of the adjusting sliding post (a42) remote from the fixed support frame (a1) and a43 restricting the T-shaped lumbar support (a4) between the position adjusting block (a43) and the top of the fixed support frame (a1), a guide structure provided between the position adjusting block (a43) and the vertical section of the T-shaped lumbar support (a 636), and a locking structure provided between the position adjusting block (a43 a) and the vertical section of the T-shaped lumbar support frame (a4), and a vertical section of the T-shaped lumbar support frame (a4) And a position locking structure.

3. The swivel chair of claim 2, wherein the vertical guide structure comprises guide protrusions (a44) disposed at both sides of an opening of the position-adjustment lumbar hole (a41) adjacent to the position-adjustment block (a43), the two guide protrusions (a44) being parallel to each other, a guide protrusion (a45) protruding toward the position-adjustment lumbar hole (a41) is provided at a side of the position-adjustment block (a43) adjacent to the position-adjustment lumbar hole (a41) and the guide protrusion (a45) is disposed between the two guide protrusions (a44), and the vertical sides of the guide protrusion (a45) are slidably connected to the guide protrusions (a44) one by one, respectively; the vertical guide structure further comprises a guide waist hole (a46) which is arranged at one end, far away from the position adjusting block (a43), of the position adjusting waist hole (a41), one end, far away from the fixed supporting frame (a1), of the adjusting sliding column (a42) is connected with a waist-shaped head (a47) and the waist-shaped head (a47) is inserted into the position adjusting waist hole (a41), and the end face, connected with the waist-shaped head (a47), of one end, of the adjusting sliding column (a42) is matched with the bottom face of the guide waist hole (a 46).

4. The swivel chair of claim 3, wherein the position locking structure comprises two locking ribs (a48), one of the locking ribs (a48) is located outside one of the guiding ribs (a44), the other locking rib (a48) is located outside the other guiding rib (a44), the locking ribs (a48) and the guiding ribs (a44) are parallel to each other, a plurality of arc-shaped locking grooves (a480) are respectively formed on each locking rib (a48) at regular intervals, locking protrusions (a430) are respectively connected to both ends of the side of the position adjustment block (a43) where the guiding protrusions (a45) are formed, one of the locking protrusions (a430) is engaged in at least one of the arc-shaped locking grooves (a480) of one of the locking ribs (a48), the other locking protrusion (a430) is engaged in at least one of the arc-shaped locking grooves (a480) of the other locking ribs (a48), an arc convex surface is respectively arranged on each locking convex part (a430) and is matched with the arc locking groove (a 480).

5. Swivel chair according to claim 1, characterized in that each end of the T-shaped lumbar support (a4) is connected with the lumbar support (a3) by a connecting structure (a5), respectively; a vertical pressure reducing groove (a31) is arranged at the upper side of the middle position of the waist support (a3), and two lateral pressure reducing grooves (a32) are communicated with the lower end of the vertical pressure reducing groove (a31), and the two lateral pressure reducing grooves (a32) are communicated to form a U-shaped groove; the transverse part of the T-shaped lumbar support frame (a4) is of an arc structure, the lumbar support (a3) is of an arc structure, and the arc radius of the transverse part of the T-shaped lumbar support frame (a4) is larger than that of the lumbar support (a 3).

6. The swivel chair of claim 1, wherein both sides of the lower end of the backrest outer frame (a2) are provided with positioning steps, both sides of the upper end of the fixing support frame (a1) are respectively fixed on the positioning steps, the inner sides of the upper ends of the fixing support frame (a1) are respectively provided with a positioning lug (a11), and a first fastening member (a12) which is arranged on the positioning lug (a11) in a penetrating way is arranged, and the first fastening member (a12) is in threaded connection with a threaded hole on the inner side of the lower end of the backrest outer frame (a 2); a second fastener (a21) is arranged at the lower end of the backrest outer frame (a2) in a penetrating way, and the second fastener (a21) is in threaded connection with a threaded hole in the middle of the fixed supporting frame (a 1).

7. The swivel chair of claim 1, wherein the lifting control mechanism comprises a cylindrical mounting seat (a22) fixed on the lower surface of the top of the outer backrest frame (a2), the headrest support (a6) is inserted into the cylindrical mounting seat (a22), a resilient latch (a23) is arranged on one side of the cylindrical mounting seat (a22) close to the human body, a plurality of latch grooves (a61) are arranged on one side of the headrest support (a6) close to the human body at intervals in sequence along the length direction of the headrest support (a6), and the resilient latch (a23) is latched in any one of the latch grooves (a 61); the side surface of the headrest support (a6) provided with the locking groove (a61) is also provided with an upper limiting convex part (a62) and a lower limiting convex part (a63), and the locking groove (a61) is positioned between the upper limiting convex part (a62) and the lower limiting convex part (a 63).

8. The swivel chair of claim 7, wherein the rotation control mechanism comprises a hinge shaft (a64) inserted through the top of the headrest support (a6), the lower end of the headrest frame (a7) is provided with two opposite hinge shaft seats (a71), the top of the headrest support (a6) is positioned between the two hinge shaft seats (a71) and the two ends of the hinge shaft (a64) are inserted through the hinge shaft seats (a71) one by one, the top of the headrest support (a6) is provided with an arc convex surface (a65) and a plurality of locking control protrusions (a66) arranged on the arc convex surface (a65) and along the width direction of the arc convex surface (a65), the lower end of the headrest frame (a7) is provided with arc cantilever locking tongues (a72) positioned above the sides of the two hinge shaft seats (a71) close to the human body, the arc concave surfaces of the arc cantilever locking tongues (a72) are positioned above the arc convex surface (a65) and a plurality of concave arc concave grooves (73) are arranged along the width direction of the arc concave arc locking tongues, the locking control protrusion (a66) is caught in any one of the locking control grooves (a 73).

9. The swivel chair of claim 1, wherein the seat comprises a seat surface, a base disposed at the bottom of the seat surface, and the leg rest mechanism disposed on the base, and the leg rest mechanism comprises at least one set of slide assemblies, a fixing member for detachably connecting the slide assemblies to the base, and a leg rest disposed at the front end of the slide assemblies; the sliding rail assembly comprises a first section of sliding rail, a second section of sliding rail and a third section of sliding rail, the second section of sliding rail is sleeved outside the first section of sliding rail, the third section of sliding rail is sleeved outside the second section of sliding rail, the first section of sliding rail can slide along the second section of sliding rail, and the second section of sliding rail can slide along the first section of sliding rail and the third section of sliding rail; the third section of slide rail is connected with the fixing piece, a first stop component for controlling the extending length of the first section of slide rail relative to the second section of slide rail is arranged between the first section of slide rail and the second section of slide rail, and a second stop component for controlling the extending length of the second section of slide rail relative to the third section of slide rail is arranged between the second section of slide rail and the third section of slide rail; the base front end seted up with the chamber of accomodating of footrest adaptation, the base is including the seat that is located the top prop up the board and be located the seat cavity board of bottom.

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