Frame structure of folding office chair

Abstract

The utility model relates to the technical field of folding chairs, and discloses a frame structure of a folding office chair, which comprises a backrest tube (1) and a seat side rod (2) connected with the backrest tube (1), a cushion (3) is mounted on the seat side rod (2), the backrest tube (1) is connected with the seat side rod (2) through a seat adapter (4), and a backrest cross rod (6) opposite to the cushion (3) is arranged on the backrest tube (1); the frame structure is arranged on the office chair to realize sitting, lying and folding of the chair, the waist fitting degree is better in the lying posture state, and the problem that the waist is suspended when a user lies flat for use is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of folding chairs, in particular to a frame structure of a folding office chair. Background Art

[0002] In order to ensure the comfort of the seat, existing office chairs usually have a sponge cushion on the seat. However, at the connection between the sponge cushion and the backrest in the frame structure of the office chair, there is an obvious height difference when the backrest lies flat at an angle greater than 140 degrees, resulting in a suspended position in the waist area. For example, an office chair disclosed in the prior application CN208550556U. At the same time, for a folding office chair, the folding of the product also needs to be considered, that is, the backrest tube and the top of the sponge cushion need to be close to horizontal in the folded state to reduce the volume in the folded state and facilitate packaging and transportation. Summary of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a frame structure of a folding office chair, which is arranged on the office chair to realize the sitting, lying and folding of the chair. In the lying position, the waist has better fit, solving the problem of the waist being suspended when the user lies flat.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A frame structure of a folding office chair includes a backrest tube and a seat surface side rod connected to the backrest tube. A seat cushion is installed on the seat surface side rod. The backrest tube and the seat surface side rod are connected through a seat surface adapter. A backrest cross bar opposite to the seat cushion is provided on the backrest tube to support the user's waist when the chair lies flat.

[0006] Preferably, the seat surface adapter includes a plug-in part connected to the seat surface side rod and a rotating part connected to the plug-in part. The rotating part is rotatably connected with a backrest adapter. Two groups of backrest adapters are respectively connected to both ends of the backrest tube. The backrest cross bar is arranged between the two groups of backrest adapters. When the chair lies flat, the backrest cross bar is located below the backrest tube, reducing the suspension of the user's waist while the backrest cross bar does not press against the waist.

[0007] The rotating part extends along the height direction of the seat cushion, so that when the chair lies flat, the backrest tube is close to horizontal with the top surface of the seat cushion, reducing the suspension of the waist; and when the chair is folded, the backrest tube is close to horizontal with the top surface of the seat cushion, and the backrest cross bar is located above the backrest tube, reducing the floor area of the chair after folding.

[0008] Preferably, the height of the rotating part is equal to the height of the seat cushion. At least two seat surface cross bars are arranged between the two groups of seat surface side rods to fixedly support the seat cushion; the seat cushion is a sponge cushion, and its front end is provided with an arc to fit the bottom of the human knee.

[0009] Preferably, footrest connectors are respectively provided on the two sets of seat surface side rods. The footrest connectors are provided with telescopic through holes, and telescopic tubes are slidably arranged in the telescopic through holes. The end of the telescopic tube is connected to the footrest.

[0010] Preferably, a flipping connector is connected to the end of the telescopic tube. The flipping connector is provided with a fixing hole and a flipping hole. A fixing rod is inserted into the fixing hole, and a flipping cross bar is inserted into the flipping hole. The footrest is fixed on the flipping cross bar. When using the footrest, the telescopic tube is stretched and the flipping cross bar is flipped until the front side of the footrest faces upward, and the fixing rod supports the footrest; when not using the footrest, the flipping cross bar is flipped until the front side of the footrest faces downward and the telescopic tube is contracted, and the footrest is placed under the seat cushion.

[0011] Preferably, the two sets of backrest adapter pieces are respectively provided with vertical tube holes for inserting and installing the backrest tubes and cross bar holes for inserting and installing the backrest cross bars, so as to quickly install the backrest tubes and the backrest cross bars; the backrest tube includes two backrest main tubes inserted into the vertical tube holes and an arc tube connected to the two backrest main tubes. The arc tube bends towards the top of the seat cushion to form a pillow area for the user's headrest.

[0012] Preferably, the two backrest main tubes and the arc tube are integrally formed and are sleeved with a backrest soft package.

[0013] Preferably, the backrest main tube is rotated with a backrest support tube through a support connector, so as to support the backrest tube when the chair lies flat; a ground support connector is provided on the side of the backrest support tube close to the ground to increase the friction force and provide the support stability of the backrest support tube.

[0014] Preferably, the seat surface adapter piece is rotatably connected with a flipping strip, and the other end of the flipping strip is rotatably connected with the chair leg to play a supporting role.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] The frame structure of the present utility model is applicable to various folding office chairs. With the cooperation of the backrest tube and the seat surface side rod, the chair can be seated, reclined and folded. In the reclined state, the backrest cross bar fits better with the waist, solving the problem that the waist is suspended when the user lies flat; at the same time, in the folded state, the top of the backrest tube and the sponge seat cushion are close to horizontal, so as to reduce the volume in the folded state and facilitate packaging and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the frame structure of the folding office chair in Embodiment 1.

[0018] Figure 2 It is a split structural diagram of the frame structure of the folding office chair in Embodiment 1.

[0019] Figure 3This is a schematic diagram of the frame structure in the sitting position in Embodiment 1.

[0020] Figure 4 This is a schematic diagram of the frame structure in the folded state in Embodiment 1.

[0021] Figure 5 This is a schematic diagram of the frame structure in the sitting position in Embodiment 2.

[0022] Figure 6 This is a schematic diagram of the frame structure in the lying position in Embodiment 2.

[0023] Figure 7 This is a schematic diagram of the frame structure of the folding office chair in the sitting position in Embodiment 2.

[0024] Figure 8 This is a schematic diagram of the frame structure of the folding office chair in the lying position in Embodiment 2.

[0025] Figure 9 This is a side view of the frame structure of the folding office chair in the lying position in Embodiment 2.

[0026] Figure 10 This is a schematic diagram of the folding office chair in the lying position in Embodiments 3 - 4.

[0027] Figure 11 This is a schematic diagram of the support connecting member in the frame structure in Embodiments 3 - 4.

[0028] In the drawings: 1 - backrest tube, 2 - seat surface side rod, 3 - seat cushion, 4 - seat surface adapter, 41 - insertion part, 42 - rotating part, 5 - backrest adapter, 6 - backrest cross bar, 7 - seat surface cross bar, 8 - footrest connecting member, 81 - telescopic perforation, 9 - telescopic tube, 10 - footrest, 11 - flipping connecting member, 12 - fixed rod, 13 - flipping cross bar, 14 - backrest soft package, 141 - backrest perforation, 142 - arc pillow, 16 - support connecting member, 16 - backrest support tube, 17 - ground support connecting member, 18 - flipping strip. Detailed implementation manners

[0029] Embodiment 1: A preferred embodiment of the present utility model provides a frame structure of a folding office chair, including a backrest tube 1 and a seat surface side rod 2 connected to the backrest tube 1. A seat cushion 3 is installed on the seat surface side rod 2. The backrest tube 1 and the seat surface side rod 2 are connected through a seat surface adapter 4. A backrest cross bar 6 opposite to the seat cushion 3 is provided on the backrest tube 1 to support the user's waist when the chair lies flat.

[0030] The seat surface adapter 4 includes a plug-in part 41 connected to the seat surface side rod 2 and a rotating part 42 connected to the plug-in part 41. The rotating part 42 is rotatably connected to a backrest adapter 5. Two groups of backrest adapters 5 are respectively connected to both ends of the backrest tube 1. A backrest cross bar 6 is arranged between the two groups of backrest adapters 5. When the chair lies flat, the backrest cross bar 6 is located below the backrest tube 1, reducing the suspension of the user's waist while the backrest cross bar 6 does not press against the waist.

[0031] The rotating part 42 extends along the height direction of the cushion 3, and when the chair lies flat, the backrest tube 1 is close to horizontal with the top surface of the cushion 3, reducing the suspension of the waist; and when the chair is folded, the backrest tube 1 is close to horizontal with the top surface of the cushion 3, and the backrest cross bar 6 is located above the backrest tube 1, reducing the floor area occupied by the chair after folding.

[0032] Preferably, the height of the rotating part 42 is equal to the height of the cushion 3. At least two seat surface cross bars 7 are arranged between the two groups of seat surface side rods 2 for fixedly supporting the cushion 3; the cushion 3 is a sponge cushion, and its front end is provided with an arc to fit the bottom of the user's knees.

[0033] Two groups of the backrest adapters 5 are respectively provided with a vertical tube hole for plugging and installing the backrest tube 1 and a cross bar hole for plugging and installing the backrest cross bar 6, so as to quickly install the backrest tube 1 and the backrest cross bar 6; the backrest tube 1 includes two backrest main tubes plugged into the vertical tube holes and an arc tube connected to the two backrest main tubes. The arc tube bends towards the top of the cushion 3 to form a pillow area for the user's headrest.

[0034] The two backrest main tubes and the arc tube are integrally formed and sleeved with a backrest soft package 14. The backrest soft package 14 includes an arc pillow 142 sleeved on the arc tube and a backrest cloth sleeve sleeved on the two backrest main tubes. The arc pillow is connected to the backrest cloth sleeve. The backrest cloth sleeve is provided with a backrest perforation 141, and the backrest cross bar 23 passes through the backrest perforation to support the backrest cloth sleeve.

[0035] Embodiment 2: A frame structure of a folding office chair provided by a preferred embodiment of the present invention is only different from the above embodiment in that: footrest connectors 8 are respectively arranged on two groups of seat surface side rods 2. The footrest connectors 8 are provided with telescopic perforations 81, and a telescopic tube 9 is slidably arranged in the telescopic perforations 81. The end of the telescopic tube 9 is connected to a footrest 10.

[0036] The end of the telescopic tube 9 is connected to a flipping connector 11. The flipping connector 11 is provided with a fixing hole and a flipping hole. A fixing rod 12 is plugged in the fixing hole, and a flipping cross bar 13 is plugged in the flipping hole. The footrest 10 is fixed on the flipping cross bar 13. When using the footrest, the telescopic tube 9 is stretched and the flipping cross bar 13 is flipped until the front side of the footrest 10 faces upwards, and the fixing rod 12 supports the footrest 10; when not using the footrest, the flipping cross bar 13 is flipped until the front side of the footrest 10 faces downwards and the telescopic tube 9 is contracted, and the footrest 10 is placed under the cushion 3.

[0037] Embodiment 3: A preferred embodiment of the present utility model provides a frame structure of a folding office chair, and the difference from the above embodiment is only that: the backrest main pipe is rotated with a backrest support pipe 16 through a support connecting member 15, a card slot for accommodating the backrest main pipe is provided on the support connecting member 15, and a fastening member 161 is provided on the side wall of the card slot, so that when the chair lies flat, the fastening member fixes the backrest main pipe, thereby realizing the support for the backrest pipe 1; a ground support connecting member 17 is provided on one side of the backrest support pipe 16 close to the ground to increase the friction force and provide the support stability of the backrest support pipe 16.

[0038] Embodiment 4: A preferred embodiment of the present utility model provides a frame structure of a folding office chair, and the difference from the above embodiment is only that: the seat surface adapter 4 is rotatably connected with a turning bar 18, and the other end of the turning bar 5 is rotatably connected with the chair leg to play a supporting role.

Claims

1. A frame structure of a folding office chair, comprising a backrest tube (1) and a seat side rod (2) connected to the backrest tube (1), a seat cushion (3) being mounted on the seat side rod (2), characterized in that: The backrest tube (1) is connected to the seat side rod (2) via a seat adapter (4); a backrest crossbar (6) opposite to the seat cushion (3) is provided on the backrest tube (1) to support the user's waist when the chair is lying flat; The seat adapter (4) comprises a plug-in portion (41) connected to the seat side rod (2) and a rotating portion (42) connected to the plug-in portion (41); the rotating portion (42) is rotatably connected to a backrest adapter (5); two groups of backrest adapters (5) are respectively connected to two ends of a backrest tube (1); a backrest cross bar (6) is arranged between the two groups of backrest adapters (5); when the chair is lying flat, the backrest cross bar (6) is located below the backrest tube (1), thereby reducing the user's waist from being suspended in the air and the backrest cross bar (6) will not press against the waist.

2. The frame structure of a folding office chair according to claim 1, characterized in that: The rotating part (42) extends along the height direction of the seat cushion (3), so that when the chair is lying flat, the backrest tube (1) and the top surface of the seat cushion (3) are close to horizontal, thereby reducing the waist hanging in the air; and when the chair is folded, the backrest tube (1) and the top surface of the seat cushion (3) are close to horizontal, and the backrest cross bar (6) is located above the backrest tube (1), thereby reducing the floor space occupied by the chair after folding.

3. The frame structure of a folding office chair according to claim 1, characterized in that: The height of the rotating part (42) is equal to the height of the seat cushion (3), and at least two seat surface cross bars (7) are provided between the two groups of seat surface side bars (2) for fixing and supporting the seat cushion (3); the seat cushion (3) is a sponge seat cushion, and its front end is provided with an arc shape to fit the bottom of the human body's knees.

4. The frame structure of a folding office chair according to claim 1, characterized in that: The two groups of seat side rods (2) are respectively provided with foot support connecting pieces (8), the foot support connecting pieces (8) are provided with telescopic through holes (81), a telescopic tube (9) is slidably provided in the telescopic through holes (81), and the end of the telescopic tube (9) is connected to the foot support (10).

5. The frame structure of a folding office chair according to claim 4, characterized in that: The end of the telescopic tube (9) is connected to a flip connector (11), and the flip connector (11) is provided with a fixing hole and a flip hole, a fixing rod (12) is inserted into the fixing hole, and a flip cross bar (13) is inserted into the flip hole, and the footrest (10) is fixed to the flip cross bar (13), so that when the footrest is used, the telescopic tube (9) is stretched and the flip cross bar (13) is flipped until the front of the footrest (10) faces upward, and the fixing rod (12) supports the footrest (10); when the footrest is not used, the flip cross bar (13) is flipped until the front of the footrest (10) faces downward, and the telescopic tube (9) is retracted, and the footrest (10) is placed under the seat cushion (3).

6. A frame structure of a folding office chair according to any one of claims 1 to 5, characterized in that: The two groups of backrest adapters (5) are respectively provided with vertical tube holes for inserting and installing the backrest tube (1) and crossbar holes for inserting and installing the backrest crossbar (6), so as to quickly install the backrest tube (1) and the backrest crossbar (6); the backrest tube (1) includes two backrest main tubes inserted into the vertical tube holes and an arc tube connected to the two backrest main tubes, and the arc tube is bent toward the top of the seat cushion (3) to form a pillow area for the user to rest his head.

7. The frame structure of a folding office chair according to claim 6, characterized in that: The two backrest main pipes are integrally formed with the arc-shaped pipe and are sleeved with a backrest soft bag (14).

8. The frame structure of a folding office chair according to claim 7, characterized in that: The backrest main pipe is rotatably connected to a backrest support pipe (16) via a support connector (15) so as to support the backrest pipe (1) when the chair is lying flat; a ground support connector (17) is provided on the side of the backrest support pipe (16) close to the ground so as to increase friction and provide support stability for the backrest support pipe (16).

9. The frame structure of a folding office chair according to claim 1, characterized in that: The seat adapter (4) is rotatably connected to a flip bar (18), and the other end of the flip bar (18) is rotatably connected to a chair leg to play a supporting role.

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