CN218419077U

CN218419077U - Back height adjusting device for chair

Info

Publication number: CN218419077U
Application number: CN202222777747.0U
Authority: CN
Inventors: 严春香
Original assignee: Hefei Qiangsheng Furniture Co ltd
Current assignee: Hefei Qiangsheng Furniture Co ltd
Priority date: 2022-10-20
Filing date: 2022-10-20
Publication date: 2023-02-03
Anticipated expiration: 2032-10-20

Abstract

The utility model provides a back of chair height adjusting device, including dead lever, sliding seat, installation cover and lead screw, the dead lever is installed in the installation cover, the dead lever upper end runs through formation downwards and rotates the hole, the shifting chute has been seted up to dead lever rear side surface, shifting chute and rotation hole intercommunication, lead screw movable mounting is downthehole in rotating, the below of lead screw passes the installation cover, and arranges in the below of installation cover, the sliding seat inner circle is fixed with the nut seat through the fixed block, the sliding seat slides and cup joints on the dead lever, just the nut seat is installed on the lead screw, compares with prior art, the utility model discloses following beneficial effect has: through being provided with the lead screw in the dead lever, and be connected the lead screw with the sliding seat through nut seat, pivoted lead screw will make nut seat make linear displacement, and then makes the sliding seat drive left back, right back and move up or move down to play the effect of adjusting left back, right back height.

Description

Back height adjusting device for chair

Technical Field

The utility model belongs to the technical field of the seat, in particular to back of chair height adjusting device.

Background

Chinese patent No. CN 217065870U describes a back of chair height adjusting device, including being used for the back link arm of being connected with the back of the chair and setting up the lasso of keeping away from back of the chair one end at back link arm, the lasso endotheca is equipped with the chair frame pipe, one side of lasso is provided with the slotted hole, back link arm is close to lasso one side and is provided with the counter bore, one side and slotted hole intercommunication setting of counter bore, be provided with locking assembly in the counter bore, locking assembly including set up in the counter bore button and with the articulated handle that sets up of button, the handle of keeping away from the one end of button passes the slotted hole setting, be provided with on the chair frame pipe with the handle matched with locking hole, the locking hole interval sets up on the chair frame pipe, be provided with locking spring between button and the counter bore, reform through the mode to current locking, utilize locking spring's elasticity to keep the inserted state of handle, through pressing the button, make the handle break away from locking hole to reach the mesh of adjusting.

The device is when adjusting back of the chair height, need press the button, make to warp and break away from the locking hole, later upwards or move down the linking arm, thereby make back of the chair height rise or descend, owing to warp the card and fix in the locking hole, need make after adjusting the height so to warp and can fix with the locking hole coincidence, because the linking arm shelters from, be difficult to see clearly and warp the specific position with the locking hole, only can upwards remove a bit more, then make under the cunning warp the card in the locking hole, such operation is comparatively inconvenient, for this reason, we provide a back of the chair height adjusting device.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a back of the chair height adjusting device, solve the problem of proposing among the above-mentioned background art to the not enough that prior art exists.

The utility model discloses a following technical scheme realizes: a chair back height adjusting device comprises a fixed rod, a sliding seat, an installation sleeve and a lead screw, wherein fixed frames are welded on the left side and the right side of the surface of an outer ring of the installation sleeve respectively;

the screw rod is movably arranged in the rotating hole, and the lower part of the screw rod penetrates through the mounting sleeve and is arranged below the mounting sleeve;

the inner ring of the sliding seat is fixed with a nut seat through a fixed block, the sliding seat is sleeved on the fixed rod in a sliding mode, the nut seat is installed on the lead screw, and the fixed block is arranged in the moving groove in a sliding mode;

the outer lane surface left and right sides of sliding seat all welds the support frame, two install left back, right back on the support frame respectively.

As a preferred embodiment, an extension rod is inserted at the top end of the fixed rod, the headrest is fixed on the extension rod, and the headrest is arranged so that the head of a user can lean against the headrest, so that the comfort is improved;

the utility model discloses a headrest, including dead lever, screw hole, extension rod, screw hole, fastening screw and extension rod in close contact with, pull up or push down the extension rod, can make the height change of headrest, when the extension rod is lax with being connected in the rotation hole, revolve wrong fastening screw, increase the friction between fastening screw and the extension rod to make the extension rod can not highly be difficult for changing.

As a preferred embodiment, two bearings are respectively fixed at the upper end and the lower end of the inner part of the rotating hole, and the screw rod is movably arranged in the rotating hole on the fixed rod through the bearings;

and a rotary disc is fixed below the screw rod, and anti-skid grains are arranged on the rotary disc.

As a preferred embodiment, a buffer pad is installed on the surface of the inward side of each support frame, the two buffer pads on the support frames are respectively connected with the left backrest and the right backrest, and the buffer pads are arranged between the support frames and the left backrest and the right backrest, and have certain elasticity, so that the impact force of a person leaning on the left backrest and the right backrest can be reduced, the comfort level can be improved, and the support frames can be protected.

As a preferred embodiment, the fixing rod is composed of two half cylinders, fixing slots are formed in the outward side surfaces of the upper ends of the two half cylinders, and the upper ends of the two half cylinders are connected into a whole through the fixing slots and fixing pins.

As a preferred embodiment, a positioning groove is respectively formed in the left side and the right side of the inner ring of the mounting sleeve, positioning blocks are welded to the lower ends of the outward sides of the two semi-cylinders, and the positioning blocks are arranged in the positioning grooves.

After the technical scheme is adopted, the beneficial effects of the utility model are that: the screw rod is arranged in the fixed rod and is connected with the sliding seat through the nut seat, the nut seat can be linearly displaced by the rotating screw rod, and then the sliding seat drives the left backrest and the right backrest to move upwards or downwards, so that the height of the left backrest and the height of the right backrest can be adjusted;

through set up the blotter between support frame and left back, right back, the blotter itself has certain elasticity, can reduce the impact force of people when leaning on left back, right back, can improve the comfort level, also can play the effect of protection support frame.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a schematic view of the overall structure of a chair back height adjusting device of the present invention.

Fig. 2 is a schematic view of the connection between the sliding seat and the nut seat of the chair back height adjusting device of the present invention.

Fig. 3 is a schematic structural view of the fixing rod of the backrest height adjusting device of the present invention.

Fig. 4 is an enlarged schematic view of a position a of the backrest height adjusting device of the present invention.

In the figure, 1-left backrest, 2-headrest, 3-right backrest, 4-support frame, 5-fixed rod, 6-sliding seat, 7-fixed frame, 8-rotating disk, 9-mounting sleeve, 10-nut seat, 11-buffer pad, 12-moving groove, 13-lead screw, 14-rotating hole and 15-positioning block.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 4, the present invention provides a technical solution: a chair back height adjusting device comprises a fixed rod 5, a sliding seat 6, an installation sleeve 9 and a lead screw 13, wherein fixed frames 7 are welded on the left side and the right side of the outer ring surface of the installation sleeve 9 respectively, the fixed rod 5 is installed in the installation sleeve 9, the upper end of the fixed rod 5 penetrates downwards to form a rotating hole 14, a moving groove 12 is formed in the surface of the rear side of the fixed rod 5, and the moving groove 12 is communicated with the rotating hole 14;

the screw 13 is movably arranged in the rotating hole 14, and the lower part of the screw 13 penetrates through the mounting sleeve 9 and is arranged below the mounting sleeve 9;

a nut seat 10 is fixed on the inner ring of the sliding seat 6 through a fixing block, the sliding seat 6 is sleeved on the fixing rod 5 in a sliding mode, the nut seat 10 is installed on a lead screw 13, and the fixing block is arranged in a moving groove 12 in a sliding mode;

the left side and the right side of the outer ring surface of the sliding seat 6 are respectively welded with a support frame 4, and a left backrest 1 and a right backrest 3 are respectively installed on the two support frames 4.

As an embodiment of the utility model, please refer to fig. 1, fig. 3, an extension rod is pegged graft on 5 tops of dead lever, headrest 2 is fixed on the extension rod, headrest 2's the head that sets up convenient to use person leans on headrest 2, the comfort level is improved, dead lever 5 front side surface upper end is seted up threaded hole, threaded hole and rotation hole 14 intercommunication, threaded hole in-connection has fastening screw, fastening screw and extension rod in close contact with, go up and draw or push down the extension rod, can make the high change of headrest 2, when extension rod and rotation hole 14's connection is lax, twist the fastening screw soon, increase the friction between fastening screw and the extension rod, thereby make the extension rod highly difficult emergence change.

As an embodiment of the present invention, please refer to fig. 1, fig. 2, and fig. 3, two bearings are respectively fixed at the upper end and the lower end inside the rotating hole 14, the screw 13 is movably installed in the rotating hole 14 on the fixing rod 5 through the bearing, the rotating disc 8 is fixed below the screw 13, and the rotating disc 8 is provided with anti-skid lines;

when the heights of the left backrest 1 and the right backrest 3 need to be increased, a user holds the rotating disc 8 by hand, and rotates the rotating disc 8 clockwise, the rotating disc 8 rotating clockwise drives the screw rod 13 to rotate, the screw rod 13 is connected with the nut seat 10, the nut seat 10 is fixed in the sliding seat 6 through the fixing block, the nut seat 10 drives the sliding seat 6 to move linearly upwards, so that the left backrest 1 and the right backrest 3 move upwards to increase the heights of the left backrest 1 and the right backrest 3, and when the heights of the left backrest 1 and the right backrest 3 need to be reduced, the rotating disc 8 rotates anticlockwise;

through being provided with lead screw 13 in dead lever 5, and be connected lead screw 13 with nut seat 6 through nut seat 10, pivoted lead screw 13 will make nut seat 10 make linear displacement, and then makes sliding seat 6 drive left back 1, right back 3 and move up or move down to play the effect of adjusting left back 1, right back 3 height.

Each support frame 4 all installs a blotter 11 towards interior side surface, and blotter 11 on two support frames 4 is connected with left back 1, right back 3 respectively, sets up blotter 11 between support frame 4 and left back 1, right back 3, and blotter 11 itself has certain elasticity, can reduce the impact force of people when leaning on left back 1, right back 3, can improve the comfort level, also can play the effect of protection support frame 4.

As an embodiment of the present invention, please refer to fig. 1, fig. 3 and fig. 4, the fixing rod 5 is composed of two half cylinders, the upper ends of the two half cylinders are both provided with fixing slots towards the outer side surface, the upper ends of the two half cylinders are connected into a whole through the fixing slots and the fixing pins, the fixing rod 5 is cut from the middle to form two half cylinders which are completely consistent, so as to facilitate the installation of the bearing, the lead screw 13 and the sliding seat 6 in the fixing rod 5, and facilitate the later disassembly and maintenance;

a locating groove has been seted up respectively on the left side of the inner circle of installation cover 9 and right side, and locating piece 15 has all been welded to the outside one side lower extreme of two semi-cylinders, and locating piece 15 is arranged in the locating groove, through passing through locating piece 15, locating groove interference fit with installation cover 9 and two semi-cylinders for two semi-cylinders can form a complete dead lever 5, and be convenient for with the installation of installation cover 9.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A chair back height adjusting device comprises a fixing rod (5), a sliding seat (6), an installation sleeve (9) and a lead screw (13), wherein fixing frames (7) are welded on the left side and the right side of the surface of an outer ring of the installation sleeve (9), the chair back height adjusting device is characterized in that the fixing rod (5) is installed in the installation sleeve (9), a rotating hole (14) is formed in the upper end of the fixing rod (5) in a downward penetrating mode, a moving groove (12) is formed in the surface of the rear side of the fixing rod (5), and the moving groove (12) is communicated with the rotating hole (14);

the screw rod (13) is movably arranged in the rotating hole (14), and the lower part of the screw rod (13) penetrates through the mounting sleeve (9) and is arranged below the mounting sleeve (9);

a nut seat (10) is fixed on the inner ring of the sliding seat (6) through a fixed block, the sliding seat (6) is sleeved on the fixed rod (5) in a sliding mode, the nut seat (10) is installed on a lead screw (13), and the fixed block is arranged in a moving groove (12) in a sliding mode;

support frames (4) are welded on the left side and the right side of the surface of the outer ring of the sliding seat (6), and a left backrest (1) and a right backrest (3) are respectively installed on the support frames (4).

2. The chair back height adjustment device of claim 1, wherein: an extension rod is inserted at the top end of the fixed rod (5), and a headrest (2) is fixed on the extension rod;

the upper end of the front side surface of the fixed rod (5) is provided with a threaded hole, the threaded hole is communicated with the rotating hole (14), a fastening screw rod is connected in the threaded hole, and the fastening screw rod is in close contact with the extension rod.

3. The chair back height adjustment device as defined in claim 1, wherein: a bearing is respectively fixed at the upper end and the lower end in the rotating hole (14), and the lead screw (13) is movably arranged in the rotating hole (14) on the fixed rod (5) through the bearing;

a rotating disc (8) is fixed below the lead screw (13), and anti-skid grains are arranged on the rotating disc (8).

4. The chair back height adjustment device as defined in claim 1, wherein: each support frame (4) all install a blotter (11) to one side surface inwards, two blotter (11) on support frame (4) are connected with left back (1), right back (3) respectively.

5. The chair back height adjustment device of claim 1, wherein: the fixing rod (5) is composed of two semicircular cylinders, wherein the upper ends of the semicircular cylinders are provided with fixing slots towards one side surface, and the upper ends of the semicircular cylinders are connected into a whole through the fixing slots and the fixing pins.

6. The chair back height adjustment device as defined in claim 5, wherein: the left side and the right side of the inner ring of the mounting sleeve (9) are respectively provided with a positioning groove, the lower ends of the outward sides of the two half cylinders are respectively welded with a positioning block (15), and the positioning blocks (15) are arranged in the positioning grooves.