CN106820717B

CN106820717B - Conference chair

Info

Publication number: CN106820717B
Application number: CN201611267538.4A
Authority: CN
Inventors: 王江林; 朱青亮
Original assignee: Henglin Home Furnishings Co Ltd
Current assignee: Henglin Home Furnishings Co Ltd
Priority date: 2016-12-31
Filing date: 2016-12-31
Publication date: 2024-04-09
Anticipated expiration: 2036-12-31
Also published as: CN106820717A

Abstract

The invention relates to a conference chair.A rotary positioning mechanism is arranged at the joint of front chair legs and rear chair legs, and the rotary positioning mechanism enables the front chair legs and the rear chair legs to relatively rotate to shrink or expand to a certain extent; a connecting rod A is fixed between the two rear chair legs, a connecting rod B is fixed between the two front chair legs, the chair seat can be rotationally fixed on the connecting rod A, and the connecting rod A and the connecting rod B jointly support the chair seat; a chair back tilting adjusting component is arranged between the chair back and the front chair legs, and a writing board component is rotatably arranged on at least one rear chair leg. The chair back has the beneficial effects that the chair back is simple in structure, can slightly tilt, is convenient for a user to record a meeting, and can be folded and stored.

Description

Conference chair

Technical Field

The invention relates to the field of office furniture equipment, in particular to a conference chair.

Background

The existing office chairs generally comprise a chair back, a chair seat and chair legs, and particularly a conference chair, and the whole chair needs to be simplified due to the limitation of conference sites. And the corresponding device is preferably arranged so that the participant can record when in a meeting, and the chair back can tilt at a small angle so as to change the view angle of the participant. Since a large number of chairs are required to be used at one time in a conference place, the problem of carrying and storing the conference chairs is also required to be considered.

Disclosure of Invention

In order to solve the problems, the invention aims to provide a conference chair which has a simple structure, can slightly tilt a chair back, is convenient for a user to record a conference, and can be folded and stored.

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

the conference chair comprises a chair back, a chair seat and chair legs for supporting the chair back and the chair seat, wherein the chair legs comprise two pairs of front chair legs and rear chair legs which are arranged in a crossing manner, a rotary positioning mechanism is arranged at the joint of the front chair legs and the rear chair legs, and the rotary positioning mechanism enables the front chair legs and the rear chair legs to relatively rotate to shrink or expand to a certain extent; a connecting rod A is fixed between the two rear chair legs, a connecting rod B is fixed between the two front chair legs, the connecting rod B is positioned at the front side of the connecting rod A, the chair seat can be rotationally fixed on the connecting rod A, and the connecting rod A and the connecting rod B jointly support the chair seat; the chair back is arranged at the rear ends of the two front chair legs, a chair back tilting adjusting assembly is arranged between the chair back and the front chair legs and comprises a rotating arm, an elastic sheet group and a fixed block, one end of the rotating arm is fixed on the chair back, the other end of the rotating arm acts on the free end of the elastic sheet group, and the fixed end of the elastic sheet group is fixed at the end part of the front chair legs through the fixed block; at least one of the rear legs is rotatably mounted with a tablet assembly.

The conference chair with the structure is characterized in that the rotary positioning mechanism is arranged between the front chair leg and the rear chair leg, the front chair leg and the rear chair leg can be rotated and contracted within a certain range through the rotary positioning mechanism, and the chair is fixed in an unfolding state without additionally arranging a locking mechanism, so that the conference chair is simple to use and convenient to store. The chair seat is supported by the two connecting rods fixed on the chair legs, the structure is simple, and the chair seat and the connecting rod A positioned at the rear side are rotatably connected, so that the chair seat can be turned upwards and contracted to be stored by the front chair legs and the rear chair legs, the occupied space of the conference chair is small, the chair seat is supported by the connecting rods A and B distributed front and back, and the supporting structure of the chair seat is simple. The chair back and the front chair leg piece are provided with the chair back slight tilting structure, and the tilting angle of the chair back in a smaller angle can be adjusted by applying force to the chair back by a user, so that the sight of the user can be conveniently adjusted. The tablet component can be arranged on the rear chair leg at one side according to the habit of a user, can be unfolded in a rotating way when in use for the user to record a meeting, and can be contracted at one side of the rear chair leg when not in use.

As the preferred technical scheme, the upper portion of the back chair foot that is equipped with the tablet subassembly is buckled forward and is formed handrail portion, and the connector is installed to the front end of handrail portion, the tablet subassembly includes tablet panel, bottom plate, locating part and rotation connecting piece, and the bottom plate is fixed in tablet panel bottom surface, and the locating part is fixed in the bottom plate bottom surface, and the locating part rotates spacing normal running fit each other between the connecting piece, rotates spacing normal running fit each other between connecting piece and the connector, and the rotation face of locating part relative rotation connecting piece is perpendicular with the rotation face of relative connector of rotation connecting piece.

The structure can realize the free rotation of the tablet panel in a certain range in the horizontal plane and the vertical plane, so that the tablet panel can be unfolded in the horizontal plane or contracted in the vertical plane, and the tablet panel and the bottom plate are respectively processed due to the higher strength required by the function of the tablet panel, so that the processing is convenient.

As the preferred technical scheme, rotate the upper end of connecting piece and be equipped with ascending cylindrical mount pad, be equipped with the shaft hole on the mount pad, the lateral wall of the upper end of mount pad is equipped with two fixture blocks that upwards extend symmetrically and set up, and after the mount pad of spacing rotating the piece upper end passed the locating part, the fixture block of mount pad upper end stretches out in the mounting hole of bottom plate, be equipped with the shaft hole on the gasket A and with the draw-in hole that the fixture block shape matches, the fixture block buckle that stretches out from the bottom plate is in the draw-in hole, and gasket A, bottom plate, locating part and rotation connecting piece are connected gradually from last down to pivot and gasket B.

As a preferable technical scheme, one end of a connector is inserted into a rear chair leg, the front end face of the other end of the connector is provided with a circular arc-shaped chute, a rotary connecting piece is connected with the connector through a rotating shaft, the rear end face of the rotary connecting piece is close to the front end face of the connector, and the rear end face of the rotary connecting piece is provided with a circular arc-shaped sliding block in sliding fit with the chute; the isolating piece is arranged between the rotating connecting piece and the connector and comprises an inserting end which is used for being inserted into a shaft hole of the rotating connecting piece and an isolating end which is used for isolating the rear side end face of the rotating connecting piece from being in direct contact with the front side end face of the connector, a slot corresponding to the sliding groove is formed in the isolating end, and the rotating connecting piece, the isolating piece and the connector are connected through a rotating shaft. The rotation limiting cooperation of the rotating connecting piece and the connector is realized through the cooperation of the sliding groove and the sliding block. If the rear end face of the rotary connecting piece is in direct contact with the front end face of the connector and rotates relatively, the two directly contacted end faces are worn after a period of use, so that a spacer is arranged between the rotary connecting piece and the connector, and one of the functions of the spacer is to prevent the rotary connecting piece from being in direct contact with the end face of the connector so as to avoid the wear of the end faces; the second function is to make the relative rotation between the rotary connecting piece and the connector smoother; and the third function is to reduce the connection gap between the rotating connecting piece and the end face of the connector, so that the two are connected more tightly.

As the preferable technical scheme, the upper end face of the rotation limiting piece is provided with a limiting protrusion, and the bottom surface of the limiting piece is provided with a limiting groove in sliding fit with the limiting protrusion. The rotation limit matching of the bottom plate and the rotary connecting piece is realized through the limit bulge and the limit groove.

As the preferable technical scheme, the limiting piece is an injection molding piece, a gear position point A and a gear position point B are arranged on the limiting groove, the width of the limiting groove at the gear position point A and the gear position point B is smaller than the width of other positions of the limiting groove, and the force required by the limiting bulge when the limiting bulge slides through the gear position point A and the gear position point B is increased relative to the force required by other positions in the limiting groove; the gear position point A and the gear position point B are respectively arranged close to two end parts of the limit groove. The gear position point can prevent the tablet component from sliding in all movement strokes of the limit groove easily after being completely unfolded or folded under the action of reverse acting force, and accords with various conditions in actual use.

As the preferred technical scheme, rotary positioning mechanism is including fixing the spacing rotation piece A on preceding chair foot and fixing the spacing rotation piece B on the chair foot behind, and spacing rotation piece A's one end is equipped with boss A, and spacing rotation piece A's homonymy terminal surface leaves and rotates mesa A, and spacing rotation piece B's one end is equipped with boss B, and spacing rotation piece B's homonymy terminal surface leaves and rotates mesa B, and spacing rotation piece A and spacing rotation piece B rotate around same axis, mutual spacing normal running fit of boss A and boss B. The limiting rotating piece A and the limiting rotating piece B are simple in structure, the front chair leg and the rear chair leg are in rotary limiting fit through the limiting rotating piece A and the limiting rotating piece B, limiting is achieved through the boss A and the boss B, and the structure is simple.

As a preferable technical scheme, a limiting rotating piece A is provided with a through hole A arranged along the axial direction, a bearing platform A for limiting is concavely arranged inwards on the hole wall at one end of the through hole A, and the bearing platform A are oppositely arranged at two ends of the limiting rotating piece A; the limiting rotating piece B is provided with a through hole B which is axially arranged, a bearing platform B used for limiting is concavely arranged inwards on the hole wall at one end of the through hole B, the bearing platform B and the bearing platform B are oppositely arranged at two ends of the limiting rotating piece B, and the limiting rotating piece A and the limiting rotating piece B are connected through a pin shaft A. The structure is arranged, so that the connecting structure of the front chair leg and the rear chair leg is positioned at the inner side of the chair leg, and the whole conference chair is simple and attractive.

As the preferable technical scheme, the bottom of the chair seat is rotatably connected with the connecting rod A through a connecting piece, the bottom of the chair seat is provided with a clamping groove matched with the connecting rod B, and after the front chair leg and the rear chair leg are completely unfolded, the clamping groove of the chair seat is buckled on the connecting rod B. The rotary positioning mechanism is arranged in a rotary range and at the position of the clamping groove on the chair seat, so that after the front chair legs and the rear chair legs are completely unfolded, the chair seat is put down, the clamping groove of the chair seat is buckled on the connecting rod B, the use is convenient, the chair seat can not be matched with the clamping groove through the connecting rod B, the mounting structure of the chair seat is stable, and excessive shaking can not occur.

As the preferable technical scheme, the connecting piece comprises an arc-shaped groove and fixing lugs arranged on two sides of the arc-shaped groove, the connecting rod A is arranged in the arc-shaped groove, the bolt is used for fixing the connecting piece at the bottom of the chair seat at the fixing lugs, and the connecting rod A can rotate around the arc-shaped groove. The connecting piece is convenient to process and install.

As a preferable technical scheme, the radial dimension and the surface radian of the connecting rod A are matched with those of the arc-shaped groove. The connecting rod A can rotate around the arc-shaped groove, the gap between the connecting rod A and the arc-shaped groove is smaller, and the chair seat cannot shake greatly after being installed.

As an optimized technical scheme, the elastic sheet group comprises a plurality of elastic sheets which are arranged in a stacked manner, the free ends of the elastic sheet group are used for connecting the plurality of elastic sheets through fasteners, the fixing block is provided with a slot with an opening at the upper end, and the fixed end of the elastic sheet group is inserted into the slot of the fixing block; the elastic sheet group and the fixing block are positioned in the connecting sleeve, the fixing block is fixed at the lower end of the connecting sleeve through bolts, and the rotating arm is fixed at the upper parts of the left connecting plate and the right connecting plate of the connecting sleeve through a pin shaft and a gasket.

As a preferable technical scheme, the lower end of the rotating arm is provided with an inverted-L-shaped abutting part, the free end of the elastic sheet group abuts against the abutting part, and the vertical edge of the abutting part is positioned at the front side of the elastic sheet group. When a user leans on the chair back, the chair back is stressed by a backward force, the rotating arm rotates around the pin shaft, the lower end of the rotating arm applies a backward pressure to the elastic sheet group, so that the elastic sheet group is deformed and bent backward, and the elastic sheet group still has the effect of supporting the back after being stressed and bent due to the high rigidity of the elastic sheet group. After the external force to the chair back is removed, the elastic sheet group is restored to drive the chair back to reset.

As the preferable technical scheme, the connecting sleeve consists of a left connecting plate, a right connecting plate and a front side plate, side sealing plates are arranged on the left side and the right side of the connecting sleeve, and the side sealing plates limit the fixed blocks and the elastic sheet groups in the connecting sleeve. The size of the rear opening of the connecting sleeve is limited by the side sealing plates, and the elastic sheet group is limited in, so that the tilting angle of the chair back can be limited to a certain extent.

As the preferable technical scheme, the front side of the fixed block is propped against the front side plate of the connecting sleeve, and the left and right side walls of the fixed block are contacted with the inner sides of the left and right connecting plates of the connecting sleeve. When the chair back leans, the fixed end of the elastic sheet group applies force to the fixed block, and the strength of the connecting structure between the fixed block and the connecting sleeve can be enhanced through the arrangement of the structure.

As the preferable technical scheme, the outside of the chair back tilting adjusting component is coated with a rubber sheath. Can prevent the hand from being pinched.

As the preferable technical proposal, the lower ends of the front chair leg and the rear chair leg are provided with idler wheels. Convenient for moving the conference chair.

As the preferable technical scheme, the rear chair legs are positioned at the outer sides of the front chair legs, after the front chair legs and the rear chair legs are completely unfolded, the front end of the chair is narrower than the rear end of the chair, after the seat is folded, the front and rear two chairs are adjacent, and the front end of the rear chair can be inserted into the rear end of the front chair. When a plurality of conference chairs are required to be carried, the front ends of the chairs at the back are only required to be sequentially inserted into the rear ends of the chairs at the front, and the carrying is convenient.

The free end in the invention refers to the direct stress end of the elastic sheet group.

In summary, the conference chair of the invention has the following advantages: 1. the conference chair has the advantages that the whole structure is simple, the chair seat can be folded upwards, and the front chair legs and the rear chair legs can be rotated and contracted relatively, so that the occupied space of the conference chair is reduced; 2. the connecting rod A and the connecting rod B are arranged to jointly support the chair seat, the chair seat is rotatably arranged on the connecting rod A, and the chair seat is fixed on a supporting plane through the cooperation of the connecting rod B, so that the structure is simple; 3. the chair back slight-tilting structure is arranged, so that the chair back can slightly tilt, and the view angle of a user is changed; 4. the writing board assembly is arranged, can be unfolded to place a paper pen when in use, has certain supporting strength, can be contracted at the side edge of the rear chair leg when not in use, and occupies small space.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a schematic view of the structure of the tilting structure of the present invention fixed in the chair leg.

Fig. 3 is an exploded view of the tilt structure of the present invention.

Fig. 4 is a bottom view of the present invention.

Fig. 5 is a schematic view of a rotary positioning mechanism according to the present invention.

Fig. 6 is a schematic structural view of a limiting rotation member a in the present invention.

Fig. 7 is a schematic view of another angle of the limiting rotation member a according to the present invention.

Fig. 8 is an exploded view of a tablet assembly and its mounting structure in accordance with the present invention.

Fig. 9 is a schematic view of another angle of fig. 8.

Fig. 10 is a top view of the stop member of the present invention.

Wherein: 1. chair back, 2, chair seat, 31, front chair leg, 32, rear chair leg, 33, connecting rod a,34, connecting rod B,41, rotating arm, 42, spring plate group, 43, fixed block, 44, connecting sleeve, 45, side sealing plate, 46, fastener, 47, pin shaft, 49, sheath, 5, rotating positioning mechanism, 51, limit rotating member a,511, boss a,5111, blocking surface a,512, rotating table a,513, through hole a,514, bearing table a, 52, limit rotating member B,53, pin shaft a,6, connector, 61, chute, 7, connecting member, 71, arc slot, 72, fixed ear, 91, tablet panel, 92, bottom plate, 93, limit member, 931, limit slot, 932, blocking point a,933, blocking point B,94, rotating connecting member 941, arc slider 942, mounting seat, 943, limit protrusion, 95, gasket a,96, gasket B,10, spacer.

Detailed Description

Preferred embodiments of the present patent are described in further detail below with reference to the accompanying drawings.

The conference chair as shown in fig. 1 to 10 comprises a chair back 1, a chair seat 2 and chair legs for supporting the chair back 1 and the chair seat 2, wherein the chair legs comprise two pairs of front chair legs 31 and rear chair legs 32 which are arranged in a crossed manner. The connection of the front chair leg 31 and the rear chair leg 32 is provided with a rotary positioning mechanism 5. The front and rear legs 31, 32 can be relatively rotated to be contracted or expanded to some extent.

As shown in fig. 1 and 5 to 7, the rotation positioning mechanism 5 includes a limit rotator a51 fixed to the front leg 32 and a limit rotator B52 fixed to the rear leg 32, the limit rotator a51 and the limit rotator B52 rotating about the same axis. One end of the limiting rotating piece A51 is provided with a boss A511, the end face on the same side of the limiting rotating piece A51 is provided with a rotating table face A512, one end of the limiting rotating piece B52 is provided with a boss B521, the end face on the same side of the limiting rotating piece B52 is provided with a rotating table face B, and the boss A and the boss B are in limiting rotating fit with each other. The boss A comprises two side baffle surfaces A5111, the boss B comprises two side baffle surfaces B, the boss A and the boss B are installed relatively, a rotating gap exists between the boss A and the boss B, the limiting rotating piece A51 and the limiting rotating piece B52 are connected through the pin shaft A53, the boss table top of the boss A rotates around the pin shaft 53 on the rotating table top B, the boss table top of the boss B rotates around the pin shaft 53 on the rotating table top A, and after the limiting rotating piece A51 and the limiting rotating piece B52 rotate relatively by an angle, one side baffle surface A of the boss A and one side baffle surface B of the boss B are propped against each other to realize limiting. The size of the gap between the bosses can be adjusted by arranging the bosses A and B, so that the relative unfolding or folding amplitude between the front chair leg and the rear chair leg can be adjusted.

The limiting rotating member a51 in this embodiment is provided with a through hole a513 axially disposed, a hole wall at one end of the through hole a513 is concavely provided with a bearing platform a514 for limiting, and the bearing platform a514 and the boss a are disposed at two ends of the limiting rotating member a opposite to each other. The limiting rotating piece B52 is provided with a through hole B which is axially arranged, a bearing platform B used for limiting is concavely arranged inwards on the hole wall at one end of the through hole B, and the bearing platform B are oppositely arranged at two ends of the limiting rotating piece B. The aperture of the through hole A is the same as that of the through hole B, the boss A and the boss B are oppositely arranged, the pin shaft A53 penetrates through the through hole A and the through hole B, and two ends of the pin shaft are limited through the bearing platform A and the bearing platform B respectively. The pin shaft is provided with threads, the threads are arranged to enable the pin shaft to be connected with the limiting rotating piece A and the limiting rotating piece B more tightly, meanwhile, the pin shaft and the limiting rotating piece A and the limiting rotating piece B are convenient to rotate relatively, and for machining convenience, the limiting rotating piece A51 and the limiting rotating piece B52 are identical in structure.

As shown in fig. 1 and 4, a link a33 is fixed between the two rear legs 32, a link B34 is fixed between the two front legs 31, the link B34 is located at the front side of the link a33, the link a33 and the link B34 are in the same horizontal plane, and the link a33 and the link B34 support the seat 2 together.

The bottom of the chair seat 2 is rotatably connected with a connecting rod A33 through a connecting piece 7, the connecting piece 7 comprises an arc-shaped groove 71 and fixing lugs 72 arranged on two sides of the arc-shaped groove 71, the connecting rod A33 is arranged in the arc-shaped groove 71, a bolt fixes the connecting piece at the bottom of the chair seat at the fixing lugs 72, and the connecting rod A33 can rotate around the arc-shaped groove 71, so that the chair seat 2 can rotate around the connecting rod A33. The radial dimension and surface radian of the connecting rod A33 are matched with those of the arc-shaped groove 71, and large relative shaking does not occur between the chair seat 2 and the connecting rod A6 in use.

The bottom of the chair seat 2 is provided with a clamping groove 21 matched with the connecting rod B34, and after the front chair legs and the rear chair legs are completely unfolded, the clamping groove 21 of the chair seat 2 is buckled on the connecting rod B34. The clamping groove 21 is arranged to be in snap fit with the connecting rod B34 to support the seat together with the connecting rod A33, so that the support structure of the seat is stable, and obvious relative shaking can not occur during use. The connecting piece is not arranged between the chair seat and the connecting rod B, and the chair seat can be just buckled on the connecting rod B after the front chair leg and the rear chair leg are completely unfolded by rotating downwards, so that the chair seat is convenient to unfold or fold.

The back chair legs are positioned at the outer sides of the front chair legs, after the front chair legs and the back chair legs are completely unfolded, the front end of the chair is narrower than the back end of the chair, after the seat is folded, the front and back two adjacent chairs can be inserted into the back end of the front chair, and the front end of the back chair can be inserted into the back end of the front chair.

As shown in fig. 2 and 3, a chair back tilting adjusting assembly is arranged between the chair back and the front chair legs, the chair back tilting adjusting assembly comprises a rotating arm 41, a spring plate group 42, a fixing block 43, a connecting sleeve 44 and a side sealing plate 45, in this embodiment, the chair back comprises a front panel and a rear panel which are buckled together, the upper end of the rotating arm 41 is clamped between the front panel and the rear panel and is fixed on the front panel or the rear panel through screws, and the rotating arm 41 is arranged in a tilting manner from top to bottom. The lower end of the rotating arm 41 acts on the free end of the elastic sheet group 42, the elastic sheet group 42 comprises a plurality of elastic sheets which are stacked, the free end of the elastic sheet group 42 is connected with the plurality of elastic sheets through the fastener 46, the fixing block 43 is provided with a slot with an open upper end, and the fixed end of the elastic sheet group 42 is inserted into the slot of the fixing block 43. The connecting sleeve 44 comprises a left connecting plate, a right connecting plate and a front side plate, the elastic sheet group 42 and the fixing block 43 are positioned in the connecting sleeve 44, the fixing block 43 is fixed at the lower end of the connecting sleeve 44 through bolts, and the front end of the fixing block 43 abuts against the front side plate of the connecting sleeve 44. One section of the lower part of the rotating arm 41 is used as a connecting part, the center of the connecting part is provided with a shaft hole, the lower end of the rotating arm 41 stretches into the connecting sleeve to be connected with the free end of the elastic sheet group 42, and the rotating arm 41 is fixed at the upper parts of the left connecting plate and the right connecting plate of the connecting sleeve at the connecting part through a pin shaft 47 and a gasket. The side sealing plates 45 are arranged at the left and right sides of the connecting sleeve 44 and are matched and fixed with the left and right connecting plates of the connecting sleeve 44 through connecting buckles and buckling holes. The front chair leg and the rear chair leg are hollow metal tubes, and the lower end of the connecting sleeve 44 is directly inserted into the upper end of the front chair leg.

The lower end of the rotating arm 41 is provided with an inverted L-shaped abutting portion, the free end of the elastic sheet group 42 abuts against the abutting portion, and the vertical edge of the abutting portion is located at the front side of the elastic sheet group.

When the back of the human body leans against the chair back to apply force to the back of the chair backwards, the rotating arm rotates around the pin shaft 47, the lower end of the rotating arm applies a directional pressure to the elastic sheet group, so that the elastic sheet group is deformed and bent backwards, and the elastic sheet group still can play a role in supporting the back after being bent under the action of stress due to the high rigidity of the elastic sheet group. After the external force to the chair back is removed, the elastic sheet group is restored to drive the chair back to reset.

Or the lower end of the rotating arm 41 can be directly and fixedly connected with the free end of the elastic sheet group.

The outer side of the chair back tilting adjusting component is coated with a sheath made of rubber or other materials for preventing hands from being clamped.

As shown in FIG. 1, the upper end of one of the rear legs is rotatably mounted with a tablet assembly. The upper portion of the back chair foot that is equipped with the tablet subassembly is buckled forward and is formed handrail portion, and connector 6 is installed to the front end of handrail portion, and the one end of connector 6 is pegged graft in the back chair foot, and the front side terminal surface of the other end of connector 6 is equipped with convex spout 61, and the central point of connector 6 front side terminal surface is equipped with the shaft hole.

As shown in fig. 8, 9 and 10, the tablet assembly includes a tablet panel 91, a bottom plate 92, a limiting member 93 and a rotating connecting member 94 which are sequentially disposed from top to bottom, the rotating connecting member 94 is connected with the connecting head 6 through a rotating shaft, a rear end surface of the rotating connecting member 94 is close to a front end surface of the connecting head 6, a circular arc-shaped sliding block 941 which is in sliding fit with the sliding groove 61 of the connecting head 6 is disposed on the rear end surface of the rotating connecting member 94, and a rotating stroke of the rotating connecting member 94 around the connecting head 6 is limited by the cooperation of the circular arc-shaped sliding block 941 and the sliding groove 61. If the rear end face of the rotary connecting member and the front end face of the connecting head are in direct contact and relatively rotated, the two directly contacted end faces wear after a period of use, so that the spacer 10 is arranged between the rotary connecting member 94 and the connecting head 6, the spacer 10 comprises a plug-in end for being inserted into a shaft hole of the rotary connecting member 94 and a spacer end for separating the rear end face of the rotary connecting member 94 from the front end face of the connecting head 6, grooves corresponding to the sliding grooves 61 are formed in the spacer end, and the rotary connecting member 94, the spacer 10 and the connecting head 6 are connected through rotating shafts. One of the functions of the spacer 10 is to prevent the spacer rotational connector 94 from directly contacting the end face of the connector 6 to avoid abrasion of the end face; the second function is to make the relative rotation between the rotary connecting piece 94 and the connecting head 6 smoother; and the third function is to reduce the connection gap between the rotary connector 94 and the end face of the connector, so that the connection between the two is more compact.

The upper end of the rotation connecting piece 94 is provided with an upward cylindrical mounting seat 942, a shaft hole is arranged on the mounting seat 942, the side wall of the upper end of the mounting seat 942 is provided with two clamping blocks which extend upward and are symmetrically arranged, and the upper end face of the rotation limiting piece 94 is also provided with a limiting boss 943. The upper part of the limiting piece 93 is provided with a limiting groove 931 which is arranged in a circular arc shape, a limiting bulge 943 of the rotating connecting piece is positioned in the limiting groove 931, the limiting piece 93 is fixed on the bottom plate 92, after the mounting seat 942 at the upper end of the limiting rotating piece passes through the limiting piece 93, a clamping block at the upper end of the mounting seat 942 extends out of a mounting hole of the bottom plate 93, a gasket A96 is provided with a shaft hole and a clamping hole matched with the clamping block in shape, a clamping block extending out of the bottom plate 92 is buckled in the clamping hole, and a rotating shaft and the gasket B96 are sequentially connected with the gasket A95, the bottom plate 92, the limiting piece 93 and the rotating connecting piece 94 from top to bottom. The bottom plate 92 is fixed on the bottom surface of the tablet panel 91, and the tablet panel 91, the bottom plate 92 and the limiting member 93 are rotatable about the rotation axis with respect to the rotation connecting member, and the rotation stroke of the tablet panel about the rotation connecting member is limited by the limiting protrusion 943 and the limiting groove 931. Wherein the rotation direction of the tablet panel 91 around the rotation connector 94 is perpendicular to the rotation direction of the rotation connector 94 around the connector 6. When not in use, the tablet component can be rotated to the side of the chair leg to shrink, the occupied space is small, and the rotary connection structure of the tablet component is simple and reliable.

The limiting member 93 is an injection molded member, as shown in fig. 10, a gear position point a932 and a gear position point B933 are provided on the limiting groove 931, the width of the limiting groove 931 at the gear position point a932 and the gear position point B933 is smaller than the width of other positions of the limiting groove 931, and the force required for the limiting protrusion 943 to slide through the gear position point a932 and the gear position point B933 is increased relative to the force required for other positions in the limiting groove 931. The gear point A932 and the gear point B933 are respectively arranged near the two end parts of the limit groove 931, and the gear point can prevent the tablet assembly from easily sliding in all movement strokes of the limit groove 931 when the tablet assembly is subjected to reverse acting force after being fully unfolded or folded, so that the tablet assembly meets various conditions in practical use.

The limit groove 931 includes an inner edge and an outer edge, wherein the outer edge near the outer circumferential edge of the limit member 93. The gear point A and the gear point B are arc-shaped protrusions which are arranged on the inner side edge and protrude towards the outer side edge, and corresponding positions of the limiting piece, which are provided with the arc-shaped protrusions, are hollowed out. When the limiting bulge passes through the arc-shaped protruding position, the arc-shaped protrusion slightly deforms towards the hollowed-out position, so that the limiting bulge can pass through the gear position A and the gear position B.

The function of setting up the tablet subassembly is in order to be convenient for people place data and record when the meeting, consequently, sets up the up end of tablet panel and is the plane to be equipped with the slot of undercut in one side border of tablet panel and be used for putting the pen.

The conference chair can be used as a conference chair, occupies small space, and can slightly tilt the chair back so as to change the view angle of a user. Meanwhile, the folding function is matched, so that the chair can be safely stored and stacked, and the space is effectively saved.

Claims

1. A conference chair, which comprises a chair back (1), a chair seat (2) and chair legs for supporting the chair back and the chair seat, and is characterized in that,

the chair legs comprise two pairs of front chair legs (31) and rear chair legs (32) which are arranged in a crossing way, a rotary positioning mechanism (5) is arranged at the joint of the front chair legs (31) and the rear chair legs (32), and the rotary positioning mechanism (5) enables the front chair legs (31) and the rear chair legs (32) to relatively rotate to shrink or expand to a certain extent;

a connecting rod A (33) is fixed between the two rear chair legs (32), a connecting rod B (34) is fixed between the two front chair legs (31), the connecting rod B (34) is positioned at the front side of the connecting rod A (33), the chair seat (2) can be rotationally fixed on the connecting rod A (33), and the connecting rod A (33) and the connecting rod B (34) jointly support the chair seat (2); the chair back (1) is arranged at the rear ends of the two front chair legs (31), a chair back tilting adjusting assembly is arranged between the chair back (1) and the front chair legs (31), the chair back tilting adjusting assembly comprises a rotating arm (41), an elastic sheet group (42) and a fixed block (43), one end of the rotating arm (41) is fixed on the chair back (1), the other end of the rotating arm (41) acts on the free end of the elastic sheet group (42), and the fixed end of the elastic sheet group (42) is fixed at the end part of the front chair legs through the fixed block; the spring piece group (42) comprises a plurality of spring pieces which are arranged in a stacked mode; the fixed block (43) is provided with a slot with an opening at the upper end, the fixed end of the elastic sheet group (42) is inserted into the slot of the fixed block (43), the slot is obliquely arranged, and the bottom of the slot is integrally positioned at the front side of the opening at the upper end; the elastic sheet group (42) and the fixed block (43) are positioned in the connecting sleeve (44), the fixed block (43) is fixed at the lower end of the connecting sleeve (44), and the rotating arm (41) is hinged with the upper end of the connecting sleeve through the pin roll (47); the connecting sleeve (44) consists of a left connecting plate, a right connecting plate and a front side plate, and the abutting part at the lower end of the rotating arm (41) is abutted with the free end of the elastic sheet group; the lower end of the connecting sleeve (44) is inserted into the upper end of the front chair leg;

at least one rear leg (32) rotatably mounts a tablet assembly;

the tablet assembly comprises a tablet panel (91), a bottom plate (92), a limiting piece (93) and a rotating connecting piece (94), wherein the bottom plate (92) is fixed on the bottom surface of the tablet panel (91), the limiting piece (93) is fixed on the bottom surface of the bottom plate (92), the limiting piece (93) and the rotating connecting piece (94) are in mutually limiting and rotating fit, the rotating connecting piece (94) and the connecting head (6) are in mutually limiting and rotating fit, and the rotating surface of the limiting piece (93) relative to the rotating connecting piece (94) is perpendicular to the rotating surface of the rotating connecting piece (94) relative to the connecting head (6); set up spacer (10) between rotating connecting piece (94) and connector (6), spacer (10) are including being used for inserting the grafting end in the shaft hole of rotating connecting piece 94 to and be used for keeping apart the rear side terminal surface of rotating connecting piece (94) and the front side terminal surface direct contact's of connector (6 the isolation end, rotate connecting piece (94), spacer (10) and connector (6) three and connect through the pivot.

2. Conference chair according to claim 1, characterized in that the upper part of the rear chair leg (32) provided with the tablet assembly is bent forward to form a armrest part, the front end of which is provided with the connecting head (6).

3. The conference chair according to claim 2, wherein the upper end of the rotary connecting piece (94) is provided with an upward cylindrical mounting seat (942), the mounting seat (942) is provided with a shaft hole, the side wall of the upper end of the mounting seat (942) is provided with two symmetrically arranged clamping blocks extending upward, after the mounting seat (942) at the upper end of the limiting rotary piece passes through the limiting piece (93), the clamping block at the upper end of the mounting seat (942) extends out of the mounting hole of the bottom plate (93), the gasket A (95) is provided with a shaft hole and a clamping hole matched with the clamping block in shape, the clamping block extending out of the bottom plate (92) is buckled in the clamping hole, and the rotating shaft and the gasket B (96) are sequentially connected with the gasket A (95), the bottom plate (92), the limiting piece (93) and the rotary connecting piece (94) from top to bottom.

4. The conference chair according to claim 2, wherein one end of the connector (6) is inserted into the rear chair leg, the front end surface of the other end of the connector (6) is provided with a circular arc-shaped sliding groove (61), the rotating connecting piece (94) is connected with the connector (6) through a rotating shaft, the rear end surface of the rotating connecting piece (94) is close to the front end surface of the connector (6), and the rear end surface of the rotating connecting piece (94) is provided with a circular arc-shaped sliding block (941) in sliding fit with the sliding groove (61); the isolation end is provided with a slot corresponding to the chute (61).

5. A conference chair according to claim 2, characterized in that the upper end surface of the rotation limiting member (94) is provided with a limiting protrusion (943), and the limiting member (93) is provided with a limiting groove (931) in sliding fit with the limiting protrusion (943).

6. A conference chair according to claim 5, wherein the limiting member (93) is an injection molded member, the limiting groove (931) is provided with a gear point a (932) and a gear point B (933), the width of the limiting groove (931) at the gear point a (932) and the gear point B (933) is smaller than the width of the other positions of the limiting groove (931), and the force required by the limiting protrusion (943) to slide through the gear point a (932) and the gear point B (933) is increased relative to the force required by the other positions of the limiting groove (931); the gear position point A (932) and the gear position point B (933) are respectively arranged near two end parts of the limit groove (931).

7. The conference chair according to claim 1, wherein the rotation positioning mechanism (5) comprises a limit rotating member a (51) fixed on the front chair leg (32) and a limit rotating member B (52) fixed on the rear chair leg (32), one end of the limit rotating member a (51) is provided with a boss a (511), the same side end face of the limit rotating member a (51) is provided with a rotating table face a (512), one end of the limit rotating member B (52) is provided with a boss B (521), the same side end face of the limit rotating member B (52) is provided with a rotating table face B, the limit rotating member a (51) and the limit rotating member B (52) rotate around the same axis, and the boss a and the boss B are in limit rotating fit with each other.

8. The conference chair according to claim 1, wherein the limiting rotating member a (51) is provided with a through hole a (513) arranged along the axial direction, a bearing platform a (514) for limiting is concavely arranged inwards on the hole wall at one end of the through hole a (513), and the bearing platform a (514) and the boss a are arranged at two opposite ends of the limiting rotating member a; the limiting rotating piece B (52) is provided with a through hole B which is axially arranged, a bearing platform B used for limiting is concavely arranged inwards on the hole wall at one end of the through hole B, the bearing platform B and the bearing platform B are arranged at two ends of the limiting rotating piece B which are oppositely arranged, and the limiting rotating piece A (51) and the limiting rotating piece B (52) are connected through a pin shaft A (53).

9. Conference chair according to claim 1, characterized in that the bottom of the seat (2) is rotatably connected with the connecting rod a (33) by means of a connecting piece (7), the bottom of the seat (2) is provided with a clamping groove (21) matched with the connecting rod B (34), and after the front chair leg (31) and the rear chair leg (32) are completely unfolded, the clamping groove (21) of the seat (2) is buckled on the connecting rod B (34).

10. Conference chair according to claim 1, characterized in that the connecting piece (7) comprises an arc-shaped groove (71) and fixing lugs (72) arranged on two sides of the arc-shaped groove (71), the connecting rod A (33) is arranged in the arc-shaped groove (71), the connecting piece (7) is fixed at the bottom of the chair seat (2) by bolts at the fixing lugs (72), and the connecting rod A (33) can rotate around the arc-shaped groove (71).

11. A conference chair according to claim 9, characterized in that the radial dimensions and surface curvature of the connecting rod a (33) match those of the arcuate slot (71).

12. Conference chair according to claim 11, characterized in that the lower end of the swivel arm (41) is provided with an inverted L-shaped abutment against which the free ends of the spring plate group (42) abut, and the vertical edge of the abutment is located at the rear side of the spring plate group.

13. Conference chair according to claim 11, characterized in that side closing plates (45) are arranged on the left and right sides of the connecting sleeve (44), the side closing plates (45) limiting the fixing blocks (43) and the spring plate groups (42) in the connecting sleeve (44).

14. Conference chair according to claim 12, characterized in that the front side of the fixing block (43) abuts against the front side plate of the connecting sleeve, and the left and right side walls of the fixing block are in contact with the inner sides of the left and right connecting plates of the connecting sleeve.

15. A conference chair as claimed in any one of claims 11 to 14, wherein a rubber sheath is wrapped around the back recline adjustment assembly.

16. Conference chair according to claim 1, characterized in that the lower ends of the front legs (31) and the rear legs (32) are provided with rollers.

17. A conference chair according to claim 16, characterized in that the rear legs (32) are located outside the front legs (31), the front ends of the chairs are narrower than the rear ends of the chairs after the front legs (31) and the rear legs (32) are fully unfolded, the two chairs are adjacent to each other in front and rear after the seat is retracted, and the front ends of the chairs in the rear can be inserted into the rear ends of the chairs in the front.