CN212815290U - Conference chair and backrest inclination adjusting device thereof - Google Patents

Abstract

The utility model discloses a conference chair and a backrest inclination adjusting device thereof, the backrest inclination adjusting device comprises a backrest joint, a chair foot joint, a matching locking piece and a driving piece, the locking piece, the operating part, mounting and the piece that resets, join in marriage the piece and inlay on the back joint of locking, chair foot joint and back joint are by means of mounting and the closure of joining in marriage the locking piece and are the installation of coaxial-type pivot, chair foot joint makes the back joint have initial position and pivot position relatively, be equipped with the gasket between mounting and the chair foot joint, be equipped with the sticking department on the back joint, driving piece and operating part are pivot ground and locate on the chair foot joint, the locking piece is located on the driving piece and arranges with the driving piece interlock, the operating part arranges with the driving piece interlock, the detachable closure of locking piece and sticking department, the piece that resets is located between chair foot joint and the back joint, the piece that resets constantly has the trend of driving back joint and switching to initial position from the pivot. The utility model discloses a back adjusting device that inclines and faces upward has stable in structure's advantage. In addition, the utility model also discloses a meeting chair.

Description

Conference chair and backrest inclination adjusting device thereof

Technical Field

The utility model relates to office furniture and field especially relate to a meeting chair and back adjusting device that inclines and faces upward thereof.

Background

The existing conference chair generally comprises a backrest, a chair seat, chair legs and the like. In order to adapt to the adjustment of sitting postures and improve the comfort, some conference chairs are also provided with a backrest inclining and inclining adjusting device, and the backrest inclining and inclining adjusting device is arranged between the backrest and the chair legs, so that the backrest can be adjusted in an inclining and inclining mode through the backrest inclining and inclining device. However, when the backrest is adjusted to tilt, the structures inside the backrest tilting device are squeezed and rubbed, and the structures are abraded after long-term use, so that the structures are loosened, noise is easily generated during use, and the use texture and the service life are affected.

Therefore, there is a need for a backrest recline adjustment mechanism and conference chair with a stable structure to overcome the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a stable in structure's back adjusting device that inclines and faces upward.

Another object of the utility model is to provide a conference chair with stable structure.

In order to achieve the above object, the utility model discloses a backrest inclination adjusting device comprises a backrest joint, a chair leg joint, a matching locking piece, a driving piece, a locking piece, an operating piece, a fixing piece and a reset piece, wherein the matching locking piece is embedded on the backrest joint, the chair leg joint and the backrest joint are coaxially pivoted and installed by the fixing piece and the locking piece of the matching locking piece, the chair leg joint relatively enables the backrest joint to have at least an initial position and a pivoting position, a gasket is arranged between the fixing piece and the chair leg joint, a locking part is arranged on the backrest joint, the driving piece and the operating piece are pivotally arranged on the chair leg joint, the locking piece is arranged on the driving piece and is linked with the driving piece, the operating piece is arranged in linkage with the driving piece, and the locking piece is detachably locked with the locking part, the driving piece drives the locking piece to be separated from locking with the locking part along with the pivoting of the operating piece in the pivoting process of the operating piece, so that the backrest joint can be switched from the initial position to the pivoting position, the resetting piece is arranged between the chair foot joint and the backrest joint, and the resetting piece always has the tendency of driving the backrest joint to be switched from the pivoting position to the initial position.

Preferably, the locking member is an internal threaded cylindrical structure, two hexagon nuts are sleeved outside the internal threaded cylindrical structure, the internal threaded cylindrical structure is embedded in the backrest joint to form a nut seat, the fixing member is a screw structure, the chair leg joint is provided with an installation through hole for the nut seat to penetrate through, the nut seat is penetrated in the installation through hole, the screw structure is screwed on the internal threaded main body structure, and the gasket is sleeved on the screw structure and attached to the end face of the chair leg joint.

Preferably, a driving inclined surface is arranged on the driving member, the locking member is slidably arranged on the driving inclined surface, and the driving inclined surface pushes the locking member to slide outwards in the pivoting process of the driving member so as to be separated from the locking with the locking portion.

Preferably, the utility model discloses a back adjusting device that leans on and faces upward still includes an elastic component and installed part, the installed part install in on the chair foot joint, the elastic component is located the installed part with between the locking piece, the elastic component has constantly and orders about the locking piece is close to the articular trend of back.

Preferably, the mounting member is an annular structure, the annular structure extends outward to form a plurality of hook arms, and the mounting member is mounted on the chair leg joint through the hook arms.

Preferably, the driving member is a cylindrical structure, the driving member is provided with a clamping groove, the operating member is provided with a protruding structure, and the protruding structure is arranged in the clamping groove.

Preferably, the utility model discloses a back adjusting device that inclines upward still includes metal insert, metal insert inlay in on the back joint, the sticking department is located on the metal insert the sticking department is slotted hole structure and arranges.

Preferably, the piece that resets is the torsional spring, be equipped with first mounting hole on the back joint, be equipped with the second mounting hole on the chair foot joint, the first end of the piece that resets install in the first mounting hole, the second end of the piece that resets install in the second mounting hole.

Preferably, the chair leg joint is provided with a movable through hole, the extending direction of the movable through hole and the extending direction of the pivot center of the chair leg joint are arranged in the same direction, and the locking piece is movably arranged in the movable through hole.

The utility model discloses a conference chair includes chair foot rest, back, pedestal and foretell back adjusting device that inclines, the back borrows by the back incline and incline adjusting device install in on the chair foot rest, the back install in on the back joint, the chair foot rest install in on the chair foot joint.

The chair foot joint and the backrest joint are coaxially and pivotally installed by locking the fixing piece and the matching and locking piece, and the resetting piece is arranged between the chair foot joint and the backrest joint. Therefore, when the backrest joint pivots relative to the chair foot joint, the reset piece is stressed to push the chair foot joint outwards, and the chair foot joint and the fixing piece are clung together. Compared with the prior art, the utility model discloses an it inlays on the back joint to join in marriage the locking piece, and the mounting that receives the top to push only can produce the extrusion with joining in marriage the locking piece, and can not produce the extrusion with the back joint, effectively avoids directly producing extrusion and abrasion to the back joint, avoids the direct destruction to the back joint production. Moreover, because of being equipped with the gasket between mounting and the chair foot joint, the mounting can not directly contact with the chair foot joint, and the mounting that receives the top to push away can only lean on the gasket, and the mounting can not rub with the terminal surface of chair foot joint, avoids causing the clearance between chair foot joint and the back joint too big because of the terminal surface abrasion, so the utility model discloses a back inclines and faces upward adjusting device's stable in structure, and is not fragile.

Understandably, because the utility model discloses a conference chair includes that chair foot rest, back, pedestal and back incline and face upward adjusting device, and the back is installed on the chair foot rest by borrowing back incline and face upward adjusting device, and the back is installed on the back joint, and the chair foot rest is installed on the chair foot joint, so the utility model discloses a conference chair is corresponding to have stable in structure, not fragile advantage.

Drawings

Fig. 1 is a schematic perspective view of the conference chair of the present invention.

Fig. 2 is a schematic perspective view of the conference chair in fig. 1 after the chair leg frame and the seat body are hidden.

Fig. 3 is a schematic perspective exploded view of the backrest reclining adjusting device of fig. 2.

Fig. 4 is a schematic perspective exploded view of the backrest recline adjustment mechanism of fig. 2 at another angle.

Fig. 5 is a schematic perspective view of a chair leg joint in the backrest inclination adjusting device of the present invention.

Figure 6 is a perspective view of the chair foot joint in figure 5 at another angle.

Fig. 7 is a schematic perspective view of the chair leg joint, the driving member, the locking member, the operating member, the fixing member, the pad, the returning member, the elastic member and the mounting member of the backrest reclining adjusting device of fig. 2, which are further hidden from view.

Fig. 8 is a partial perspective view of the backrest recline adjustment mechanism of fig. 7 with the locking member disengaged from the backrest joint.

Detailed Description

In order to explain technical contents and structural features of the present invention in detail, the following description is made with reference to the embodiments and the accompanying drawings.

As shown in fig. 1, the conference chair 100 of the present invention includes a backrest inclination adjusting device 10, a chair leg frame 20, a backrest 30 and a seat body 40, wherein the backrest 30 is mounted on the chair leg frame 20 via the backrest inclination adjusting device 10, the backrest 30 is mounted on a backrest joint 11 (described in detail later), and the chair leg frame 20 is mounted on a chair leg joint 12 (described in detail later). The backrest 30 is adjustable for reclining by the backrest reclining adjustment device 10 such that the backrest 30 can be rotated to a proper angle to provide a comfortable sitting condition. It should be noted that the chair leg frame 20, the backrest 30 and the seat body 40 may be of a conventional structure, and thus, the description thereof is omitted.

As shown in fig. 1 to 4, 7 and 8, the backrest reclining adjusting device 10 of the present invention includes a backrest joint 11, a leg joint 12, a fitting lock 13, a driving member 14, a locking member 15, an operating member 16, a fixing member 17, and a returning member 18. The locking piece 13 is embedded on the backrest joint 11, and the chair leg joint 12 and the backrest joint 11 are coaxially and pivotally installed by locking the fixing piece 17 and the locking piece 13. The chair foot joint 12 relatively enables the backrest joint 11 to have at least an initial position and a pivoting position. A gasket 171 is arranged between the fixed piece 17 and the chair foot joint 12, a locking part 111 is arranged on the backrest joint 11, the driving piece 14 and the operating piece 16 are pivotally arranged on the chair foot joint 12, the locking piece 15 is arranged on the driving piece 14 and is arranged in a linkage manner with the driving piece 14, the operating piece 16 is arranged in a linkage manner with the driving piece 14, and the locking piece 15 is detachably locked with the locking part 111. The driving member 14 follows the pivoting of the operating member 16 during the pivoting of the operating member 16 to move the locking member 15 out of the locking with the locking portion 111, so that the backrest joint 11 can be switched from the initial position to the pivoting position. The reset piece 18 is arranged between the chair foot joint 12 and the backrest joint 11, and the reset piece 18 always has the tendency of driving the backrest joint 11 to be switched from the pivot position to the initial position. The chair foot joint 12 and the backrest joint 11 are coaxially and pivotally installed through the locking of the fixing piece 17 and the locking piece 13, and the resetting piece 18 is arranged between the chair foot joint 12 and the backrest joint 11. Therefore, when the backrest joint 11 pivots relative to the leg joint 12, the restoring member 18 is forced to push the leg joint 12 outward, so that the leg joint 12 is tightly attached to the fixing member 17. The utility model discloses an join in marriage lock piece 13 and inlay on back joint 11, the mounting 17 that receives the top to push only can produce the extrusion with joining in marriage lock piece 13, and can not produce the extrusion with back joint 11, effectively avoids directly producing extrusion and abrasion to back joint 11, avoids the direct destruction to back joint 11 production. Moreover, because the gasket 171 is arranged between the fixing member 17 and the chair leg joint 12, the fixing member 17 cannot directly contact with the chair leg joint 12, the pushed fixing member 17 can only abut against the gasket 171, the fixing member 17 cannot rub the end surface of the chair leg joint 12, and the excessive gap between the chair leg joint 12 and the backrest joint 11 caused by abrasion of the end surface is avoided.

As shown in fig. 3, 4, 7 and 8, the locking member 13 is an internal thread cylinder structure, two hexagon nuts 131 are sleeved outside the internal thread cylinder structure, the internal thread cylinder structure is embedded on the backrest joint 11 to form a nut seat 112, the fixing member 17 is a screw structure, the chair leg joint 12 is provided with an installation through hole 121 for the nut seat 112 to penetrate through, the nut seat 112 penetrates through the installation through hole 121, the screw structure is screwed on the internal thread main body structure, and the gasket 171 is sleeved on the screw structure and attached to the end surface of the chair leg joint 12. The two hexagonal nuts 131 can make the internal threaded column structure stably and firmly embedded on the backrest joint 11. After the nut seat 112 is inserted into the installation through hole 121, the coaxial installation of the chair foot joint 12 and the backrest joint 11 is realized, and the backrest joint 11 is stably supported by the nut seat 112, so that the backrest joint 11 is stably and reliably installed with the chair foot joint 12. The locking piece 13 and the fixing piece 17 are simple in structure and easy to arrange, and the locking piece 13 and the fixing piece 17 can be detached and are convenient to overhaul and replace. For example, the restoring member 18 of the present invention is a torsion spring, but is not limited thereto. For the stable installation of the torsional spring of realization, the utility model discloses a be equipped with first mounting hole 113 on the back joint 11, be equipped with second mounting hole 122 on the chair foot joint 12, the first end that resets 18 is installed in first mounting hole 113, and the second end that resets 18 is installed in second mounting hole 122. Preferably, in order to prevent the radial displacement between the leg joint 12 and the backrest joint 11, the leg joint 12 is provided with a sleeve structure 125 surrounding the mounting through hole 121, and the nut seat 112 is sleeved in the sleeve structure 125.

As shown in fig. 3 to fig. 6, a driving inclined surface 141 is provided on the driving member 14, the locking member 15 is slidably disposed on the driving inclined surface 141, and the driving inclined surface 141 pushes the locking member 15 to slide outwards during the pivoting process of the driving member 14, so as to disengage from the locking portion 111. The linkage relationship between the driving member 14 and the locking member 15 is simple and easy to arrange and implement. Specifically, the driving member 14 is a cylindrical structure, the driving member 14 is provided with a locking groove 142, the operating member 16 is provided with a protruding structure 161, and the protruding structure 161 is disposed in the locking groove 142. The driving member 14 is linked with the operating member 16 by the cooperation of the protrusion structure 161 and the engaging groove 142, so that the structure is simple and easy to implement, and the driving member 14 and the protrusion structure 161 can pivot synchronously, and the response is fast. In order to automatically reset the locking member 15 after sliding outward, the backrest reclining adjusting device 10 of the present invention further includes an elastic member 19 and a mounting member 120, the mounting member 120 is mounted on the leg joint 12, the elastic member 19 is disposed between the mounting member 120 and the locking member 15, and the elastic member 19 always has a tendency of driving the locking member 15 to approach the backrest joint 11. When the backrest joint 11 rotates to the initial position, the locking piece 15 is automatically aligned and clamped into the locking part 111 under the action of the elastic piece 19, and the locking between the chair foot joint 12 and the backrest joint 11 is realized. For example, the elastic member 19 is a spring, but is not limited thereto. More specifically, the mounting member 120 is a ring structure, a plurality of hook arms 1201 extend outward from the ring structure, and the mounting member 120 is mounted on the chair leg joint 12 via the hook arms 1201. The driving member 14 can be connected to the operating member 16 through the mounting member 120, and the mounting member 120 can be stably mounted on the leg joint 12 by the hook arm 1201. For example, the chair leg joint 12 is provided with an assembling through hole 124 for the hook arm 1201 to pass through, and the hook arm 1201 is installed on the chair leg joint 12 through the assembling through hole 124, but not limited thereto.

As shown in fig. 3 to 8, the backrest reclining adjusting device 10 of the present invention further includes a metal insert 114, the metal insert 114 is inserted into the backrest joint 11, the locking portion 111 is disposed on the metal insert 114, and the locking portion 111 is disposed in a slot structure. The metal insert 114 can reinforce the structural strength and rigidity of the back joint 11 when it is fitted to the back joint 11. Specifically, the chair leg joint 12 is provided with a movable through hole 123, the extending direction of the movable through hole 123 is arranged in the same direction as the extending direction of the pivot center of the chair leg joint 12, and the locking member 15 is movably installed in the movable through hole 123. The locking member 15 is restricted by the movable through hole 123 and slides linearly in the movable through hole 123, so that the locking member 15 can be quickly and stably engaged with or disengaged from the locking portion 111, and the locking member 15 can be stably mounted on the leg joint 12.

The operation principle of the conference chair 100 of the present invention is explained with reference to fig. 1 to 8: when the backrest needs to be tilted, a person drives the operating element 16 to rotate, the operating element 16 rotates to drive the driving element 14 to rotate, the driving element 14 pushes the locking element 15 to slide outwards by the driving inclined plane 141, so that the locking element 15 is disengaged from the locking part 111 to release the lock, and the elastic element 19 is compressed by the pushing of the locking element 15. At this time, people can push the backrest 30 to perform tilting adjustment, the backrest joint 11 can perform rotation adjustment between the pivoting position and the initial position, and the reset piece 18 is deformed by external force. When people do not push the backrest 30 any more, the reset piece 18 restores the deformation and resets, so that the backrest joint 11 automatically switches the initial position, and the automatic reset of the backrest 30 is realized. At this time, the manual operation of the operating element 16 rotates in the opposite direction, the rotation of the operating element 16 drives the driving element 14 to rotate in the opposite direction, the elastic element 19 drives the locking element 15 to approach the backrest joint 11, and finally the locking element 15 is re-clamped in the locking part 111, so that the relocking of the chair foot joint 12 and the backrest joint 11 is realized.

The chair foot joint 12 and the backrest joint 11 are coaxially and pivotally installed by locking the fixing piece 17 and the locking piece 13, and the resetting piece 18 is arranged between the chair foot joint 12 and the backrest joint 11. Therefore, when the backrest joint 11 pivots relative to the leg joint 12, the restoring member 18 is forced to push the leg joint 12 outward, so that the leg joint 12 is tightly attached to the fixing member 17. Compared with the prior art, the utility model discloses an it inlays on back joint 11 to join in marriage lock piece 13, and the mounting 17 that receives the top to push only can produce the extrusion with joining in marriage lock piece 13, and can not produce the extrusion with back joint 11, effectively avoids directly producing extrusion and abrasion to back joint 11, avoids the direct destruction to back joint 11 production. Moreover, because of being equipped with gasket 171 between mounting 17 and the chair foot joint 12, mounting 17 can not directly contact with chair foot joint 12, and the mounting 17 that receives the top to push can only lean on gasket 171, and mounting 17 can not rub with the terminal surface of chair foot joint 12, avoids causing the clearance between chair foot joint 12 and the back joint 11 too big because of the terminal surface abrasion, so the utility model discloses a back inclines and faces upward adjusting device 10's stable in structure, and is not fragile.

Understandably, because the utility model discloses a conference chair 100 includes chair foot rest 20, back 30, pedestal 40 and back adjusting device 10 that inclines, back 30 borrows by back adjusting device 10 that inclines and installs on chair foot rest 20, and back 30 installs on back joint 11, and chair foot rest 20 installs on chair foot joint 12, so the utility model discloses a conference chair 100 correspondingly has stable in structure, not fragile advantage.

The above disclosure is only a preferred embodiment of the present invention, and the scope of the claims of the present invention should not be limited thereby, and all the equivalent changes made in the claims of the present invention are intended to be covered by the present invention.

Claims (10)

1. The utility model provides a back regulator that inclines and faces upward which characterized in that: the chair leg joint and the backrest joint are coaxially pivoted and installed by virtue of the fixing piece and the locking piece, the chair leg joint relatively enables the backrest joint to at least have an initial position and a pivoting position, a gasket is arranged between the fixing piece and the chair leg joint, a locking part is arranged on the backrest joint, the driving piece and the operating piece are pivotally arranged on the chair leg joint, the locking piece is arranged on the driving piece and is in linkage arrangement with the driving piece, the operating piece and the driving piece are in linkage arrangement, the locking piece and the locking part are detachably locked, and the driving piece is driven to separate from the locking part by following the pivoting of the operating piece in the pivoting process of the operating piece, so that the backrest joint can be switched from the initial position to the pivoting position, the reset piece is arranged between the chair foot joint and the backrest joint, and the reset piece has a tendency of driving the backrest joint to be switched from the pivoting position to the initial position.

2. The backrest inclination adjusting device according to claim 1, wherein the locking member is an internal threaded cylindrical structure, two hexagon nuts are sleeved outside the internal threaded cylindrical structure, the internal threaded cylindrical structure is embedded in the backrest joint to form a nut seat, the fixing member is a screw structure, the chair leg joint is provided with an installation through hole for the nut seat to penetrate through, the nut seat penetrates through the installation through hole, the screw structure is screwed on the internal threaded main body structure, and the gasket is sleeved on the screw structure and attached to the end surface of the chair leg joint.

3. The backrest recline adjustment device according to claim 1, wherein said driving member has a driving ramp, said locking member is slidably disposed on said driving ramp, said driving ramp urges said locking member to slide outwardly away from engagement with said locking portion during pivoting of said driving member.

4. The backrest recline adjustment device of claim 1 further including a resilient member and a mounting member, said mounting member being mounted to said leg joint, said resilient member being disposed between said mounting member and said locking member, said resilient member having a constant tendency to urge said locking member toward said backrest joint.

5. The backrest recline adjustment mechanism of claim 4, wherein said mounting member is a ring structure having a plurality of hook arms extending outwardly therefrom, said mounting member being mounted to said leg joint by said hook arms.

6. The backrest recline adjustment device of claim 1, wherein said driving member is a cylindrical structure, said driving member defines a slot therein, said operating member defines a projection structure therein, and said projection structure is disposed in said slot.

7. The backrest recline adjustment apparatus of claim 1, further including a metal insert mounted to said backrest knuckle, said locking portion being provided on said metal insert and said locking portion being disposed in a slotted hole configuration.

8. The backrest inclination adjusting device according to claim 2, wherein the restoring member is a torsion spring, a first mounting hole is formed in the backrest joint, a second mounting hole is formed in the chair leg joint, a first end of the restoring member is mounted in the first mounting hole, and a second end of the restoring member is mounted in the second mounting hole.

9. The backrest inclination adjusting device according to claim 1, wherein the leg joint is provided with a movable through hole, the extending direction of the movable through hole is arranged in the same direction as the extending direction of the pivot center of the leg joint, and the locking member is movably mounted in the movable through hole.

10. A conference chair comprising a chair leg frame, a backrest, a seat body and a backrest inclination adjustment device, the seat body being mounted on the chair leg frame, characterized in that the backrest inclination adjustment device is as claimed in any one of claims 1 to 9, the backrest is mounted on the chair leg frame by means of the backrest inclination adjustment device, the backrest is mounted on the backrest joint, and the chair leg frame is mounted on the chair leg joint.

Images