Indoor office chair

Abstract

An indoor office chair is used for solving the technical problem that in the prior art, a chair waist rest cannot be well attached to the waist of a user, so that the supporting performance of the waist rest on the waist of the user is lowered, the indoor office chair comprises a chair back, a lifting block is vertically arranged on the chair back in a sliding mode, and a mounting frame is rotationally arranged on the lifting block; a first waist rest is fixedly arranged in the mounting frame, two second waist rests are rotationally arranged in the mounting frame and located on the two sides of the first waist rest respectively, a cavity is formed in one side of the mounting frame, and a limiting assembly used for limiting rotation of the mounting frame is arranged in the cavity.

Description

TECHNICAL FIELD

[0001] The utility model relates to a chair technical field, concretely relates to an indoor office chair. BACKGROUND

[0002] As a common furniture, chairs are inseparable from people's work and life. A chair generally comprises a seat and a backrest, which provide support for the user's hips and back respectively.

[0003] A chair in the prior art, such as the utility model patent document with the patent name "Office chair with waist support" and the authorization announcement number "CN218738048U", discloses a chair, which comprises a chair body, a support column, a backrest and armrests arranged on both sides of the chair body. The front side of the backrest is provided with a waist support and a height adjusting device connected with the waist support. The rear side of the backrest is provided with a length adjusting device connected with the height adjusting device. The length adjusting device comprises a threaded stud connected to the backrest. One end of the threaded stud is fixed to the height adjusting device, and the other end of the threaded stud is connected with a rotating wheel through a spline. The utility model further comprises a drive shaft rotatably connected to the armrest. The drive shaft is arranged perpendicularly to the backrest. One end of the drive shaft is coaxially fixed with a driving wheel. A belt is arranged between the driving wheel and the rotating wheel.

[0004] The waist support needs to be in close contact with the user's waist to obtain good support during use. The angle of the waist support in the above patent document cannot be adjusted. When different users lean on the chair, the waist support cannot be in close contact with the user's waist, thereby reducing the support of the waist support to the user's waist. SUMMARY

[0005] The utility model aims at the deficiencies of the prior art and proposes an indoor office chair to solve the technical problem that the waist support of the chair in the prior art cannot be in close contact with the user's waist, thereby reducing the support of the waist support to the user's waist.

[0006] The above technical purpose of the utility model is achieved by the following technical scheme:

[0007] An indoor office chair comprises a chair back. A lifting block is vertically slidably arranged on the chair back. An installation frame is rotatably arranged on the lifting block. A first waist support is fixedly arranged in the installation frame. Two second waist supports are rotatably arranged in the installation frame and are respectively arranged on both sides of the first waist support. A cavity is formed in one side of the installation frame, and a limiting assembly for limiting the rotation of the installation frame is arranged in the cavity.

[0008] Working principle:

[0009] The vertical height of the mounting frame on the chair back can be changed by sliding the lifting block on the chair back, thereby changing the vertical positions of the first lumbar support and the second lumbar support; the mounting frame can rotate on the lifting block; when the user's waist is close to the first lumbar support and the second lumbar support, the first lumbar support and the second lumbar support on the mounting frame can follow the user's waist; when the user needs to fix the rotation angle of the first lumbar support and the second lumbar support, the user can limit the rotation of the mounting frame through the limiting assembly, thereby fixing the rotation angle of the first lumbar support and the second lumbar support.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] First, the lifting block and the mounting frame are arranged, the vertical position of the mounting frame on the chair back can be changed by vertically moving the lifting block on the chair back, thereby the mounting frame can change the vertical positions of the first lumbar support and the second lumbar support on the chair back.

[0012] Second, the first lumbar support and the second lumbar support are arranged, the user's waist can be supported through the first lumbar support, and the two sides of the user's waist can be supported through the two second lumbar supports.

[0013] Third, the limiting assembly is arranged, the rotation angle of the mounting frame can be limited through the limiting assembly, thereby the angle of the first lumbar support and the second lumbar support can be fixed. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model embodiment;

[0015] Figure 2 It is a structural schematic view of the utility model embodiment; Figure 1 It is an enlarged sectional view of position A in the utility model embodiment;

[0016] Figure 3 It is an enlarged assembly view of position B in the utility model embodiment; Figure 1

[0017] Figure 4 It is an assembly structural schematic view of the lifting block and the supporting rod;

[0018] Figure 5 It is an assembly structural schematic view of the lifting block and the rotating rod;

[0019] Figure 6 It is a structural schematic view of the ratchet wheel.

[0020] ​Explanation of reference signs: chair back 1, lifting block 2, mounting frame 3, first waist support 4, second waist support 5, cavity 6, rotating rod 7, ratchet 8, fixing rod 9, pawl 10, spring 11, ratchet tooth 12, bolt 13, cam 14, mounting rod 15, torsion spring 16, supporting rod 17, groove 18, through hole 19, elastic block 20, seat plate 21, armrest 22, gas rod 23, chair leg 24. DETAILED DESCRIPTION

[0021] The technical solutions in the utility model are further described below in combination with the drawings and examples.

[0022] Example:

[0023] As shown in Figure 1 and Figure 4 and Figure 5 An indoor office chair, comprising a chair back 1, the chair back 1 is mounted on a seat plate 21, two armrests 22 are mounted on the bottom of the seat plate 21 on both sides, a gas rod 23 is mounted at the bottom of the seat plate 21, a chair leg 24 is mounted at the bottom of the gas rod 23, a lifting block 2 is vertically slidably arranged on the chair back 1, two supporting rods 17 are fixedly arranged on the chair back 1, a plurality of vertical grooves 18 are formed in the two supporting rods 17, two through holes 19 are formed in the lifting block 2 and are slidably connected with the two supporting rods 17 respectively, an elastic block 20 is fixedly arranged on the inner wall of each through hole 19 and abuts against the groove 18 on the supporting rod 17, the lifting block 2 can move vertically on the supporting rod 17 of the chair back 1 through the through hole 19, and the elastic block 20 in the through hole 19 can abut against the groove 18 on the supporting rod 17 and deform when the lifting block 2 moves, so that the vertical position of the moved lifting block 2 can be fixed, and the elastic block 20 is made of elastic rubber material.

[0024] As shown in Figure 1 and Figure 2 and Figure 5 A mounting frame 3 is rotatably arranged on the lifting block 2, and two rotating rods 7 are fixedly arranged on the two sides of the mounting frame 3, one of the rotating rods 7 is rotatably connected with the outer wall of the mounting frame 3, and the other rotating rod 7 is slidably arranged in the cavity 6, so that the mounting frame 3 can be conveniently rotated on the lifting block 2 through the rotating rods 7 on the two sides of the lifting block 2.

[0025] As shown in Figure 1 and Figure 3As shown, the first waist rest 4 is fixedly arranged in the mounting frame 3, two second waist rests 5 are rotatably arranged in the mounting frame 3 and are respectively located at two sides of the first waist rest 4, two mounting rods 15 are fixedly arranged in the mounting frame 3 and are respectively located at two sides of the first waist rest 4, the two second waist rests 5 are respectively rotatably arranged on the two mounting rods 15, the second waist rests 5 can rotate on the mounting rods 15, torsion springs 16 are sleeved on the two mounting rods 15 and two ends of the torsion springs 16 are fixedly connected with the mounting frame 3 and the second waist rests 5 respectively, when the torsion springs 16 abut against two sides of the waist of the user, the torsion of the torsion springs 16 can make the second waist rests 5 tightly abut against the two sides of the waist of the user, thereby providing a certain supporting force.

[0026] As shown in Figure 1 and Figure 2 , a cavity 6 is formed in one side of the mounting frame 3 and a limiting assembly for limiting rotation of the mounting frame 3 is arranged in the cavity 6, the limiting assembly comprises a ratchet wheel 8, two fixed rods 9, two pawls 10 and two springs 11, the ratchet wheel 8 is fixedly arranged on a rotating rod 7 extending into the cavity 6, two circles of ratchet teeth 12 in opposite directions are formed on the ratchet wheel 8, the two fixed rods 9 are fixedly arranged in the cavity 6 and are respectively located at opposite sides of the ratchet wheel 8, the two pawls 10 are rotatably arranged on the two fixed rods 9 respectively, the two pawls 10 are engaged with the two circles of ratchet teeth 12 respectively, the two springs 11 are fixedly arranged on the inner wall of the cavity 6 and are fixedly connected with the two pawls 10 respectively, the two pawls 10 can be engaged with the two circles of ratchet teeth 12 under the action of the springs 11, a bolt 13 is threadedly connected on the mounting frame 3, a cam 14 is fixedly arranged on the bolt 13 and is used to abut against one of the pawls 10 after being rotated to make it away from the ratchet teeth 12, the two cams 14 can be rotated by rotating the bolt 13, the two cams 14 can push the two pawls 10 after being rotated, so that the two pawls 10 are away from the two circles of ratchet teeth 12 on the ratchet wheel 8, thereby the mounting frame 3 can rotate with the waist of the user under the action of the rotating rod 7.

[0027] Working principle:

[0028] When the user needs to change the rotation angle of the first waist support 4 and the second waist support 5 while sitting on the seat plate 21, the user rotates the bolt 13, the bolt 13 drives the two cams 14 to rotate, the two cams 14 rotate and abut the two pawls 10 respectively, since the two pawls 10 are pushed by the two cams 14, the two pawls 10 can rotate on the two fixed rods 9, the pawls 10 after rotation are disengaged from the ratchet teeth 12 on the ratchet 8, at this time the spring 11 is in a compressed state, so that the user can rotate the mounting frame 3 on the lifting block 2 through the rotating rod 7, and then the mounting frame 3 drives the first waist support 4 and the second waist support 5 to rotate, when the user needs to fix the mounting frame 3 after rotation, the user rotates the bolt 13, the bolt 13 drives the two cams 14 to rotate, after the two cams 14 rotate, the pawls 10 are tightly attached to the cams 14 under the pushing force of the spring 11, when the cams 14 are completely disengaged from the pawls 10, the pawls 10 can re-abut the ratchet teeth 12 on the ratchet 8, at this time the spring 11 is in a natural state, since the two pawls 10 re-abut the ratchet 8, the rotating rod 7 fixed with the ratchet 8 cannot rotate, and then the mounting frame 3 cannot rotate on the lifting block 2.

[0029] When the user needs to change the vertical position of the mounting frame 3 on the chair back 1, the user can move vertically through the cooperation of the through hole 19 on the lifting block 2 and the support rod 17, and the moving lifting block 2 can be fixed through the cooperation of the groove 18 and the elastic block 20.

[0030] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. An office chair for indoor use, characterized in that The utility model provides a chair back (1), vertical sliding is equipped with lifting block (2) on the chair back (1), rotating is equipped with mounting frame (3) on lifting block (2), first waist rest (4) is fixedly arranged in mounting frame (3), two second waist rests (5) are rotatably arranged in mounting frame (3) and two second waist rests (5) are located first waist rest (4) both sides respectively, one side of mounting frame (3) is equipped with cavity (6) and is equipped with limiting assembly for limiting mounting frame (3) rotation in cavity (6).

2. An office chair for indoor use according to claim 1, characterized in that: Two rotors (7) are fixedly arranged on the both sides of mounting frame (3), one of the rotors (7) is rotatably connected with the outer wall of mounting frame (3), and the other rotor (7) is slidably arranged into the cavity (6).

3. An office chair for indoor use according to claim 2, characterized in that: The limiting assembly comprises a ratchet wheel (8), two fixed rods (9), two pawls (10) and two springs (11), the ratchet wheel (8) is fixedly arranged on the rotor (7) extending into the cavity (6), two circles of ratchet teeth (12) with opposite directions are formed on the ratchet wheel (8), the two fixed rods (9) are fixedly arranged in the cavity (6) and located on the opposite sides of the ratchet wheel (8), the two pawls (10) are rotatably arranged on the two fixed rods (9), the two pawls (10) are engaged with the two ratchet teeth (12), and the two springs (11) are fixedly arranged on the inner wall of the cavity (6) and connected with the two pawls (10).

4. An office chair for indoor use according to claim 3, characterized in that: The mounting frame (3) is threadedly connected with a bolt (13), the cam (14) is fixedly arranged on the bolt (13) and used for abutting against one of the pawls (10) to move away from the ratchet teeth (12) after being rotated.

5. An office chair for indoor use according to claim 1, characterized in that: Two mounting rods (15) are fixedly arranged in the mounting frame (3) and located on the both sides of the first waist rest (4), the two second waist rests (5) are rotatably arranged on the two mounting rods (15), the torsional springs (16) are sleeved on the two mounting rods (15) and connected with the mounting frame (3) and the second waist rests (5) at both ends.

6. An office chair for indoor use according to claim 1, characterized in that: Two supporting rods (17) are fixedly arranged on the chair back (1), a plurality of vertical recesses (18) are formed in the two supporting rods (17), two through holes (19) are formed in the lifting block (2) and can be slidably connected with the two supporting rods (17), and the elastic blocks (20) are fixedly arranged on the inner walls of the two through holes (19) and abut against the recesses (18) on the two supporting rods (17).

Images