CN217488076U - Base mechanism capable of adjusting angle of chair back and office chair - Google Patents

Abstract

The utility model relates to a base mechanism and an office chair capable of adjusting the angle of a chair back, which comprises a tray component and a rotating component, wherein one end of the rotating component is connected and fixed with the bottom end of the chair back, the other end of the rotating component is hinged with the tray component, and the chair back and the rotating component can rotate around the hinged part at the same time; the runner assembly includes a vertical locking post of establishhing, the locking post is equipped with a plurality of from last kerfs of extremely erecting in proper order down, tray assembly includes a spring bolt, the spring bolt is towards the locking post, and the rotation of runner assembly can make the spring bolt put into the kerfs locking of different positions, realizes three and keeps off the regulation, and human bearing can three different angles when bending back, the convenient rest.

Description

Base mechanism capable of adjusting angle of chair back and office chair

Technical Field

The utility model relates to an office chair technical field, concretely relates to base mechanism and office chair that can adjust back of the chair angle.

Background

An office chair refers to various chairs which are convenient to work in daily work and social activities, a narrowly defined office chair refers to a backrest chair on which a person sits when performing desktop work in a sitting posture, and a generalized office chair refers to all chairs used in offices.

At present, the base mechanism of most office chairs is all fixed, then leads to the unable regulation of its angle, and the top can realize the oscilaltion increase-adjusting effect more, and the angle of leaning on of the back of the chair is fixed and can't sit and have a rest on this chair when leading to noon break.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can adjust base mechanism and office chair of back of the chair angle realizes three fender regulations, can three different angles when human bearing is faced back, the convenient rest.

In order to achieve the purpose, the main technical solution of the present invention is a base mechanism capable of adjusting the angle of a chair back, comprising a tray component and a rotating component, wherein one end of the rotating component is connected and fixed with the bottom end of the chair back, the other end of the rotating component is hinged with the tray component, and the chair back and the rotating component can rotate around the hinged part at the same time; the runner assembly includes a vertical locking post of establishhing, the locking post is equipped with a plurality of locked groove from last to vertical row in proper order down, the tray subassembly includes a spring bolt, the spring bolt is towards the locking post, and the rotation of runner assembly can make the spring bolt put into the locked groove locking of different positions.

In some examples, the rotating assembly further comprises a bottom plate member and a transverse plate, wherein two sides of the bottom plate member are bent upwards vertically to form two side wall plates, two ends of the transverse plate are respectively connected with the two side wall plates, the locking column is vertically arranged in the middle of the transverse plate, the locking column is positioned between the transverse plate and the bottom plate member, and the same ends of the two side wall plates are hinged to the tray assembly.

In some examples, the bottom end of the chair back is provided with a bending plate, and the transverse end part of the bending plate is fixedly connected with the bottom plate component.

In some examples, the tray assembly further comprises a chassis base, a seat cover and a lifting adjusting assembly, wherein the lock tongue is arranged at one end of the chassis base, the end of the lock tongue is exposed out of the chassis base, the exposed end can be inserted into the lock groove, the seat cover is arranged on the chassis base, and the lifting adjusting assembly is arranged on the chassis base.

In some examples, the seat cover partially rotates the assembly, and the locking post is hidden within the seat cover covering area.

In some examples, three lock grooves are formed in the locking column, and when the chair back rotates at different angles, the lock tongues can be respectively placed in the lock grooves at different heights and lock the rotation angles at the moment.

In some examples, the lifting adjustment assembly comprises a lifting air rod, a shifting piece and an adjustment handle, the adjustment handle comprises a handle part and a rod body part, the rod body part is rotatably arranged on the chassis base, and the handle part is arranged at one end of the rod body part; one end of the shifting piece is arranged on the rod body and is positioned in the chassis seat, and the other end of the shifting piece is abutted against the triggering end of the lifting air rod.

An office chair is characterized by comprising a chair back and the base mechanism.

The utility model discloses owing to adopted above technical scheme to realize following effect: through the cooperation between locking post and the spring bolt, there is the selection of keeping off at the angle between the back of the chair and the seat support to can lock on one of them keeps off, make things convenient for human bearing to have a rest.

Drawings

Figure 1 is a schematic structural view of an embodiment of the present invention,

figure 2 is a schematic view of the structure of the adjustment member of the embodiment of figure 1,

figure 3 is a schematic structural view of the cover plate of the embodiment of figure 1,

figure 4 is a schematic view of the structure of the headrest of the embodiment of figure 1,

figure 5 is a schematic structural view of the lumbar support mechanism of the embodiment of figure 1,

figure 6 is an exploded view of the lumbar support mechanism of the embodiment of figure 5,

figure 7 is an exploded view of the lumbar support mechanism configuration from another perspective of the embodiment of figure 5,

figure 8 is a schematic structural view of the base unit of the embodiment of figure 1,

figure 9 is a schematic view of the base unit of the embodiment of figure 8 with the cover removed,

figure 10 is a schematic view showing the structure of an office chair provided with only an adjusting piece and a headrest portion,

in the figure: the chair comprises a headrest part 1, a hinge part 11, a rotating groove 12, a chair back 2, a chair seat 3, a bottom plate part 31, a transverse plate 32, a locking column 33, a locking groove 34, a chassis seat 35, a seat cover 36, a bolt 37, a lumbar support mechanism 4, a U-shaped arm 41, a guide strip 411, a sliding cover plate 42, a locking groove 421, a lumbar support part 43, a positioning block 431, a clamping piece 432, a sliding channel 44, a rotating part 45, a threaded part 46, a seat body part 47, a U-shaped clamping hand 48, an adjusting transverse plate 49, an elastic locking bead 491, a guide channel 492, an adjusting piece 5, a rotating surface 51, a limiting block 52, an unlocking groove 53, a concave-convex structure 54, a guide sliding groove 55, a cover plate 6, an elastic plate 61, a step block 62, an elastic clamping piece 63 and a guide ridge 64.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The underlying principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purpose of limitation.

It is to be understood that the terms "a" and "an" are to be interpreted as meaning that a number of one element may be one in one embodiment or multiple in another embodiment, and the terms "a" and "an" are not to be interpreted as limiting the number.

The first embodiment is as follows:

referring to fig. 1 and 10 of the drawings attached to the specification of the present invention, an office chair according to a preferred embodiment of the present invention includes a chair back 2, a chair seat 3, a headrest portion 1 and a lumbar support mechanism 4, wherein the bottom end of the chair back 2 is connected to one end of the chair seat 3, the headrest portion 1 is movably connected to the top end of the chair back 2 through an adjusting member 5, and the back side of the headrest portion 1 is hinged to the top end of the adjusting member 5 and can rotate a certain angle relative to the adjusting member 5; the other end of the adjusting piece 5 is movably inserted on the chair back 2, and the distance between the headrest part 1 and the chair back 2 can be longitudinally adjusted relative to the chair back 2; the lumbar support mechanism 4 comprises a lumbar support part 43, a longitudinal adjusting assembly and a transverse moving assembly; the front wall surface of the lumbar support part 43 is used for waist leaning, the longitudinal adjusting component comprises a fixing part and an adjusting part, the fixing part is fixedly connected to the back wall surface of the lumbar support part 43, one end part of the adjusting part is movably arranged on the fixing part, and the lumbar support part 43 is moved up and down to enable the fixing part to longitudinally slide relative to the adjusting part; the transverse moving assembly comprises an operating member for operating the transverse displacement of the waist rest part and the longitudinal adjusting assembly, and the operating member is movably connected with the adjusting part; the chair seat 3 comprises a base mechanism, the base mechanism comprises a tray component and a rotating component, one end of the rotating component is connected and fixed with the bottom end of the chair back 2, the other end of the rotating component is hinged with the tray component, and the chair back 2 and the rotating component can rotate around the hinged position at the same time; the rotating assembly comprises a longitudinally-arranged locking column 33, the locking column 33 is provided with a plurality of locking grooves 421 which are sequentially arranged from top to bottom, the tray assembly comprises a locking bolt 37, the locking bolt 37 faces the locking column 33, and the rotation of the rotating assembly can enable the locking bolt 37 to be placed into the locking grooves 421 at different positions for locking; the main innovation points of the technical scheme are as follows: the headrest part 1 can be lifted up and down relative to the chair back 2 to adapt to the distance between the head and the body of different people, and the headrest part 1 can be rotated by a certain angle to achieve the angle suitable for the head of a user to depend on; the lumbar support part 43 can be vertically and longitudinally adjusted to adjust the waist depending position when the human body is properly seated, and the lumbar support part 43 can also transversely move back and forth, so that the ejection or retraction of the lumbar support part 43 can be adjusted according to the actual seated person; thirdly, through the cooperation between locking post 33 and the spring bolt 37, there is the selection of many grades in the angle between the back of the chair 2 and the seat support 3 to can lock in one of them and keep off, make things convenient for human bearing rest.

Specifically, the adjusting piece 5 is in a 7 shape, and a sliding adjusting section for adjusting and locking the distance between the headrest part 1 and the chair back 2 is arranged on the longitudinal surface wall of the adjusting piece 5; the chair back 2 is provided with an insertion port connected with the adjusting part 5, one side wall of the insertion port is provided with two elastic clamping pieces 63432 which slide relative to the sliding adjusting section and are positioned against the sliding adjusting section, wherein the chair back 2 is integrally formed with the insertion port which is difficult to manufacture, and the other mode is to realize the formation of the insertion port by splicing, the technical scheme mainly adopts the latter mode, the top end part of the chair back 2 is used as a bottom plate, the bottom plate is detachably connected and fixed with a cover plate 6, the bottom plate and the cover plate 6 are combined to form the insertion port, and the inner side wall of the cover plate 6 is the side wall of the insertion port; in addition, the sliding adjusting section and the elastic latch 63 have the effect of relatively sliding and abutting against each other, and the means for achieving the effect are many, for example, a plurality of locking holes are arranged on the sliding adjusting section, and the elastic latch 63 is an elastic locking ball 491; in the embodiment, two adjusting tracks are symmetrically arranged on the side wall of the adjusting part 5 positioned in the sliding adjusting section, the surfaces of the adjusting tracks are in a continuous concave-convex structure 54, wherein the convex edge part is an arc surface; the middle part of the elastic clamping piece 63 is a protrusion, and in the longitudinal sliding process, the protrusion of the elastic clamping piece 63 sequentially slides through the concave-convex structure 54 and is embedded into the concave part to lock and position the adjusting piece 5, so that the strength of the structure is higher when the structure is locked, and because the headrest part 1 has certain weight and certain downward force when the head of a user is rested, the relative sliding and the abutting positioning are realized in the structural mode; the side wall of the adjusting member 5 between the two adjusting tracks is provided with an unlocking groove 53 formed by an inward recess.

As a further optimization scheme, an avoiding gap exists between the two elastic clamping pieces 63, the avoiding gap can be provided with an elastic plate 61, the inner side of the elastic plate 61 protrudes to form a step block 62, and the step block 62 is placed in the unlocking groove 53, so that the technical scheme is to prevent the whole adjusting piece 5 from being pulled out of the inserting port to be separated from the chair back 2 when the adjusting piece 5 is longitudinally adjusted; in addition, on the basis of the technical scheme, an optimized design is further made, the bottom end of the elastic plate 61 extends downwards to be exposed outside, the bottom end of the elastic plate 61 is pulled outwards to enable the step block 62 to move out of the unlocking groove 53421, the technical scheme can pull the adjusting piece 5 out of the plug socket through a manual mode so as to be convenient to replace or maintain, and the mode is that after a user supports the bottom end of the elastic plate 61 through fingers and pulls outwards, the step block 62 moves out of the unlocking groove 53421, and the adjusting piece 5 is pulled outwards.

In order to prevent the adjusting member 5 from shifting or moving unsmoothly when moving longitudinally, in the present embodiment, a guide sliding groove 55 is respectively disposed on the side wall of the adjusting member 5 at both sides of the two adjusting tracks; two guiding edges 64 are arranged on the side walls of the insertion port respectively positioned at the two sides of the elastic clamping piece 63, and the two guiding edges 64 are respectively arranged in the two guiding sliding grooves 55.

The back side part of the headrest part 1 is outwards protruded to form a hinge part 11, the hinge part 11 is hinged to the top end of the adjusting part 5 through a pin shaft, the circumferential wall surface part of the hinge part 11 is sunken to form a rotating groove 12 used for rotating the headrest part 1 by an angle, a limiting block 52 is arranged on a rotating surface 51 of the top end of the adjusting part 5 corresponding to the rotating groove 12, the limiting block 52 is arranged in the rotating groove 12, and the side wall of the rotating groove 12 is abutted to the limiting block 52 to lock the rotating angle.

The fixing component is provided with a longitudinal sliding channel 44, one end of the adjusting component is placed in the sliding channel 44 and can be locked and positioned on one section of the sliding channel 44, the implementation manner of the structure is similar to the implementation manner of the sliding adjusting section and one side wall of the socket mentioned above, and the structure has many implementation means, in this embodiment, the fixing component comprises a U-shaped arm 41 and a sliding cover plate 642, two ends of the U-shaped arm 41 are respectively connected and fixed on the upper and lower side ends of the back wall surface of the lumbar support component 43, the sliding cover plate 642 is connected in the U-shaped arm 41 and forms the sliding channel 44 with the U-shaped arm 41, the adjusting component comprises an adjusting seat and an adjusting transverse plate 49, and the adjusting seat comprises a seat body portion 47 and a U-shaped grab handle 48 integrally formed with the seat body portion 47; the adjusting transverse plate 49 is arranged in the sliding channel 44 in a penetrating manner, and two ends of the adjusting transverse plate 49 are exposed out of the sliding channel 44 and are respectively connected with two ends of the U-shaped gripper 48; the wall surface of the adjusting transverse plate 49 can slide and lock relative to the inner side wall of the sliding cover plate 42, a plurality of locking grooves 421 are longitudinally and sequentially arranged on the inner side wall of the sliding cover plate 42, an elastic locking bead 491 is arranged on the side wall of the adjusting transverse plate 49 facing the sliding cover plate 42, and when the elastic locking bead 491 is embedded into the locking groove 421, the adjusting part is locked and positioned relative to the fixing part; in addition, for the purpose of smooth longitudinal adjustment, two guide strips 411 are longitudinally arranged on the inner side wall of the U-shaped arm 41, a guide channel 492 is arranged on the other side wall of the adjusting transverse plate 4932, the guide strips 411 are placed in the guide channel 492, the guide strips 411 are in a U-shaped structure, the outer edges of the guide strips 411 are fixedly connected with the inner side wall of the U-shaped arm 41, and the inner edges of the guide strips 411 serve as a limited distance for the longitudinal sliding of the adjusting transverse plate 49, and the guide strips 411 in this embodiment further have the effect of reinforcing ribs to enhance the strength of the U-shaped arm 41; control the piece including rotation portion 45 and screw thread portion 46, be equipped with a pair of interface in the seat portion 47, the inner wall to the interface is equipped with the internal thread with screw thread portion 46 looks adaptation, screw thread portion 46 meets with the interface, rotates portion 45 through the wrench movement and then adjusts lateral displacement, rotates the control piece through the manual work for seat portion 47 relative screw thread portion 46 can outwards remove or inwards move back, and then realizes the lateral shifting of waist by part 43.

The U-shaped arm 41 is of a hollow pipe body structure, and two clamping holes are symmetrically formed in the side walls of two ends of the U-shaped arm respectively; the upper side end and the lower side end of the back wall surface of the lumbar support part 43 are respectively provided with a positioning block 431, two sides of each positioning block 431 are symmetrically provided with clamping pieces 432, and the positioning blocks 431 can be placed in the pipe bodies at two ends of the U-shaped arm 41 and are buckled like clamping holes through the clamping pieces 432 to be fixed.

The rotating assembly further comprises a bottom metal plate part 31 and a transverse plate 32, two sides of the bottom metal plate part 31 are bent upwards vertically to form two side wall plates, two ends of the transverse plate 32 are connected with the two side wall plates respectively, the locking column 33 is vertically arranged in the middle of the transverse plate 32, the locking column 33 is positioned between the transverse plate 32 and the bottom metal plate part 31, and the same ends of the two side wall plates are hinged to the tray assembly; the bottom end of the chair back 2 is provided with a bending plate, the transverse end part of the bending plate is fixedly connected with the bottom metal plate part 31, and the bending plate has certain elasticity and can be slightly deformed properly; tray assembly still includes chassis seat 35, seat cover 36 and lift adjustment assembly, the spring bolt 37 set up in chassis seat 35's one end and its tip expose in chassis seat 35 outward, and the tip that exposes can be pegged graft in locked groove 421, seat cover 36 lid is established on chassis seat 35, lift adjustment assembly set up in on the chassis seat 35, seat cover 36 covers partial rotating assembly, locking post 33 hides in seat cover 36 covers the region, and this technical scheme can protect locking post 33 not destroyed effectively, hide effectively with in the seat cover 36. The locking column 33 is provided with three locking grooves 421, when the chair back 2 rotates at different angles, the locking bolts 37 can be respectively placed in the locking grooves 421 at different heights and lock the rotating angles at the moment, so as to meet the resting angles of different human body seats; the lifting adjusting assembly comprises a lifting air rod, a shifting sheet and an adjusting handle, the adjusting handle comprises a handle part and a rod body part, the rod body part is rotatably arranged on the chassis seat 35, and the handle part is arranged at one end of the rod body part; one end of the shifting piece is arranged on the rod body and is positioned in the chassis seat 35, and the other end of the shifting piece is abutted to the triggering end of the lifting air rod.

In addition, among this technical scheme, the office chair still is equipped with a foot bracket, foot bracket articulate in the other end of seat support 3, foot bracket can turn over relative seat support 3 and turn over, then is used for the human shank of bearing after the expansion, then effectively hides the bottom with seat support 3 after folding the shrink, conveniently accomodates

Example two:

as shown in fig. 10, an office chair capable of adjusting a headrest is provided, in this embodiment, a headrest portion 1 is movably connected to a top end of a chair back 2 through an adjusting piece 5, and a back side of the headrest portion 1 is hinged to a top end of the adjusting piece 5 and can rotate at a certain angle relative to the adjusting piece 5; the other end of the adjusting piece 5 is movably inserted into the chair back 2, and the distance between the headrest part 1 and the chair back 2 can be longitudinally adjusted relative to the chair back 2, in other words, in the technical scheme, the structural mode and the connection relation of the headrest part 1 and the adjusting piece 5 in the first embodiment, the connection relation and the structure of the adjusting piece 5 and the chair back 2 are adopted, and the lumbar support mechanism 4 and the base mechanism are not arranged.

And (3) implementation:

in the embodiment, the lumbar support mechanism 4 of the first embodiment is adopted, and the headrest 1 and the base mechanism are not provided.

Example four:

in the embodiment, the base mechanism of the first embodiment is adopted, and the headrest 1 and the lumbar support mechanism 4 are not provided.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention.

The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims (8)

1. A base mechanism capable of adjusting the angle of a chair back (2) is characterized by comprising a tray component and a rotating component, wherein one end of the rotating component is fixedly connected with the bottom end of the chair back (2), the other end of the rotating component is hinged with the tray component, and the chair back (2) and the rotating component can rotate around the hinged part at the same time; the runner assembly includes a vertical locking post (33) of establishhing, locking post (33) are equipped with a plurality of from last kerfs (421) of vertical row in proper order down, the tray subassembly includes a spring bolt (37), spring bolt (37) are towards locking post (33), and the rotation of runner assembly can make spring bolt (37) put into kerfs (421) locking of different positions.

2. The base mechanism as claimed in claim 1, wherein the rotating assembly further comprises a bottom plate member (31) and a horizontal plate (32), two sides of the bottom plate member (31) are bent upwards vertically to form two side wall plates, two ends of the horizontal plate (32) are respectively connected with the two side wall plates, the locking column (33) is vertically arranged in the middle of the horizontal plate (32), the locking column (33) is located between the horizontal plate (32) and the bottom plate member (31), and the same ends of the two side wall plates are hinged to the tray assembly.

3. The base mechanism as claimed in claim 2, characterized in that the bottom end of the chair back (2) is provided with a bending plate, and the transverse end of the bending plate is fixedly connected with the bottom plate member (31).

4. The base mechanism of claim 1, wherein the tray assembly further comprises a chassis base (35), a base cover (36) and a lifting adjusting assembly, the latch (37) is disposed at one end of the chassis base (35) and the end of the latch is exposed out of the chassis base (35), the exposed end can be inserted into the lock groove (421), the base cover (36) is disposed on the chassis base (35), and the lifting adjusting assembly is disposed on the chassis base (35).

5. The base unit of claim 4, wherein the cover (36) covers part of the rotating assembly, and the locking posts (33) are hidden in the area covered by the cover (36).

6. The base mechanism of claim 1, wherein the locking column (33) is provided with three locking grooves (421), and when the chair back (2) rotates at different angles, the locking tongues (37) can be respectively placed in the locking grooves (421) at different heights and lock the rotation angles.

7. The base unit of claim 4, wherein the lift adjustment assembly comprises a lift air lever, a paddle, and an adjustment handle, the adjustment handle comprising a handle portion and a lever portion, the lever portion rotatably disposed on the chassis base (35), the handle portion disposed at one end of the lever portion; one end of the shifting piece is arranged on the rod body and is positioned in the chassis seat (35), and the other end of the shifting piece is abutted against the triggering end of the lifting air rod.

8. An office chair comprising a chair back (2) and a base mechanism as claimed in any one of claims 1 to 7.

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