DETACHABLE CHAIR BASE

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No. 202421278553.9, filed on Jun. 5, 2024, which is hereby incorporated by reference in its entirety.

TECHNICAL FIELD

The disclosure relates to the technical field of chair bases, and particularly relates to a detachable chair base.

BACKGROUND

Chairs, as furniture for daily life, are seats with backrests and armrests. Modern chairs pursue aesthetics and fashion. Some chairs no longer merely serve as seats. In combination with science and technology, chairs make human life more convenient.

At present, part of chair bases is made of a metal material. Therefore, during processing, the chair bases will be processed in a welding manner, so that the chair bases are integral, and thus, the chair bases cannot be detached in the transportation process, resulting in inconvenient transportation and an increase of the transportation cost. Therefore, we propose a detachable chair base to solve the above problem. Therefore, a detachable chair base is needed to solve the above problem.

SUMMARY

An objective of the disclosure is to solve the problem mentioned in the above background art.

In order to achieve the above objective, the disclosure uses the following technical solution:

A detachable chair base, including a chair underframe, where a first supporting mechanism and a second supporting mechanism clamped in a cross manner are connected to a surface of the chair underframe and a connecting mechanism is mounted above the first supporting mechanism and the second supporting mechanism through a mounting seat; the mounting seat includes a lower connecting plate, an upper connecting plate is mounted at four corners of the lower connecting plate in an abutted manner through long rod bolts, an abutting mechanism is arranged at a central position of a top end of the upper connecting plate, the abutting mechanism includes a supporting column connected and fixed to the upper connecting plate, an insert shaft is inserted at a top end of the supporting column through a polygonal slot, a movable frame is connected to a top end of the insert shaft, a fixed plate is rotatably mounted at a top end of the movable frame, a chair frame is mounted at a top end of the fixed plate, the chair frame includes a chair seat, a bottom end of a sitting surface of the chair seat is abutted and fixed to the fixed plate through a bolt, two inner plates are symmetrically connected to a right side of a bottom end of the chair seat, a magic tape is arranged on the surface of each of the inner plates, the magic tape is adhered to a cloth curtain, and a top end of the cloth curtain is sutured and abutted to a side of the bottom end of the chair seat through a needle and a thread. The cloth curtain and the side of the chair seat are sutured with the needle and the thread. During use, the cloth curtain can be lifted to inspect the area under the sitting surface of the chair seat, and the disassembly of the structure below the chair seat is convenient.

Preferably, the first supporting mechanism includes a first support leg, both ends of the first support leg are fixed to the surface of the chair underframe through first screws, the second supporting mechanism includes a second support leg, a tail end of the second support leg is fixed to the surface of the chair underframe through a second screw, the second support leg is buckled to a surface of a top end of the first support leg, and mounting holes matching with the long rod bolts are formed in surfaces of the first support leg and the second support leg. The first support leg and the chair underframe can be abutted and fixed through the first screws, so that a top end of the chair underframe and the first support leg form a whole. A groove matching with the first support leg is formed in a bottom end of the second support leg, so that the first support leg and the second support leg are combined and fixed conveniently.

Preferably, a positioning bolt is inserted into a crossover position between the first support leg and the second support leg by penetrating a through hole, a shaft end of the positioning bolt is inserted into the lower connecting plate through a thread, a base plate sleeves outside the shaft end of the positioning bolt, and the base plate is abutted and buckled to bottom ends of the first support leg and the second support leg. The positioning bolt penetrates through the first support leg and the second support leg and is then inserted into the threaded hole in a bottom end of the lower connecting plate, so that the first support leg and the second support leg can be positioned for mounting.

Preferably, the cross-section of the chair underframe is annular, a plurality of groups of screw holes are equidistantly formed in a surface of a bottom end of the chair underframe, both ends of the first support leg and the second support leg are arc-shaped, with radians being the same as a surface radian of the chair underframe. An annular structure of the chair underframe is adapted to arc-shaped ends of the first support leg and the second support leg match to limit the first support leg and the second support leg, so that the first support leg and the second support leg are prevented from deforming under downward pressure.

Preferably, the connecting mechanism includes a connecting crossbar, mounting holes matching with the long rod bolts are formed in a surface of the connecting crossbar, and transverse brace rods are mounted in an abutting manner on both sides of the connecting crossbar through fixed bolts. After the first support leg and the second support leg are assembled, the long rod bolts penetrate through the connecting crossbar, the upper connecting plate, the lower connecting plate, the first support leg or the second support leg in sequence to assemble and limit the first support leg and the second support leg, so that misalignment of the first support leg and the second support leg are avoided.

Preferably, top ends of sides of the two transverse brace rods are connected and fixed through an auxiliary supporting frame bar, the auxiliary supporting frame bar is located at a bottom end of the sitting surface of the chair seat, and limit spacing is arranged between the auxiliary supporting frame bar and the bottom end of the sitting surface of the chair seat. There is a distance between the auxiliary supporting frame bar and the sitting surface of the chair seat. When the sitting surface of the chair seat inclines, the auxiliary supporting frame bar can support the bottom end of the sitting surface of the chair seat, so that the comfort of sitting on the chair seat is guaranteed.

Preferably, the supporting column and a side of the insert shaft are abutted and fixed through a locking accessory, the locking accessory includes a bayonet lock, the bayonet lock penetrates through the supporting column and is then inserted into the slot of the insert shaft, the bayonet lock is of a U-shaped structure, a rubber gasket is mounted in an embedded manner on a side of a transverse plate end of the bayonet lock through a groove, and the rubber gasket is abutted and adhered to an inner wall of the slot of the insert shaft. The shaft end of the bayonet lock penetrates through the supporting column and is then inserted into the insert shaft for locking, so that the abutting convenience of the insert shaft and the supporting column can be guaranteed.

Preferably, a thread rotary knob is rotatably mounted at a central position of a right side of the bayonet lock through a rotation hole, a shaft end of the thread rotary knob is inserted into the supporting column through a threaded hole, and a gasket sleeves outside the shaft end of the thread rotary knob. The shaft end of the thread rotary knob moves rotatably in the supporting column to drive the bayonet lock to move, so as to control a depth to which the bayonet lock is inserted into the slot of the insert shaft.

Preferably, two buffer mechanisms are symmetrically arranged on left and right sides of the supporting column, each of the buffer mechanisms includes a clamping block, the clamping block is inserted into a side of the supporting column through a limiting groove, a side plate is connected outside the clamping block, a vertical plate is connected outside the side plate, two buffer springs are connected to a side of the vertical plate, a page plate is connected to a tail end of each of the buffer springs, the page plate is fixed to the bottom end of the sitting surface of the chair seat, a third screw is inserted into a side of the side plate through a through hole, a shaft end of the third screw is inserted into the fixed block through a threaded hole, and the fixed block is connected and fixed to the supporting column. The third screw penetrates through the side plate and is then inserted into the threaded hole of the fixed block for locking, so that the mounting stability of the side plate is guaranteed. The buffer springs can support the fixed plate. When a user sits on the sitting surface of the chair seat, the chair seat inclines slightly. The buffer springs can support and buffer the chair seat.

The disclosure at least has the following beneficial effects:

• • 1. According to the detachable chair base, the first support leg and the second support leg are clamped with each other, so that the first support leg and the second support leg are connected and fixed to the chair underframe through the first screw and the second screw. Moreover, through the long rod bolts, the first screw and the second screw and the connecting crossbar are fixed and connected to the lower connecting plate and the upper connecting plate respectively. The transverse brace rod may be mounted outside the connecting crossbar through the fixed bolts, so that the chair underframe can be integrally assembled. A conventional welding mode of the chair underframe is changed, and the chair underframe is fixed and mounted through a plurality of groups of screws, so that the transportation of the chair underframe in parts can be effectively facilitated, and the transportation cost is lowered.
  • 2. By arranging the abutting mechanism, the chair seat and the chair underframe are rapidly abutted as a whole. The detachable chair base is fixed to a bottom end of the chair seat through the fixed plate. During abutting, the insert shaft is inserted into the supporting column, the bayonet lock is pre-inserted into and penetrates through the supporting column, and is then inserted into the slot of the insert shaft. The thread rotary knob moves in the threaded hole of the supporting column to synchronously drive the bayonet lock to be deeply inserted into the slot of the insert shaft, so as to guarantee the abutting convenience and stability of the supporting columns. The supporting columns are freely disassembled and assembled, so that the convenience of transportation in parts is further improved.
  • 3. By arranging the connecting mechanism and the buffer mechanisms, the sitting surface of the chair underframe can be autonomically adjusted. By arranging the two buffer mechanisms on both sides of the supporting column and arranging the buffer springs between the page plate and the vertical plate for supporting, the chair seat and the fixed plate are abutted and fixed to each other. The sitting surface of the chair seat can incline freely under downward pressure of the user. When one side of the chair seat is under force, the fixed plate can incline on the surface of the movable frame with the sitting surface of the chair seat. In this case, the buffer spring at the inclined end is compressed, so that the sitting surface of the chair seat has certain inclination, and the comfort of sitting of the user is improved. There is a distance between the auxiliary supporting frame bar and the bottom end of the chair seat. Therefore, when the sitting surface of the chair seat inclines, the bottom end of the sitting surface can be supported, and the maximum inclination of the sitting surface of the chair seat is limited, preventing the user from leaning backward or slipping forward while sitting.

BRIEF DESCRIPTION OF DRAWINGS

In order to describe the technical solutions in embodiments of the present disclosure more clearly, the drawings required for the description of the embodiments will be briefly introduced below. Apparently, the drawings described below are only some embodiments of the present disclosure. For persons skilled in the art, other drawings can be obtained based on these drawings without creative labor.

FIG. 1 is a schematic diagram of an external structure of a detachable chair base provided by the disclosure;

FIG. 2 is a schematic diagram of an external disassembled structure of a detachable chair base provided by the disclosure;

FIG. 3 is a schematic diagram of a three-dimensional disassembled structure of a first supporting mechanism, a mounting seat, and a connecting mechanism in a detachable chair base provided by the disclosure;

FIG. 4 is a three-dimensional top view of a mounting seat and a connecting mechanism in a detachable chair base provided by the disclosure;

FIG. 5 is a schematic diagram of a three-dimensional disassembled structure of the first supporting mechanism in a detachable chair base provided by the disclosure;

FIG. 6 is a schematic diagram of a three-dimensional disassembled structure of an abutting mechanism in a detachable chair base provided by the disclosure; and

FIG. 7 is a schematic diagram of a three-dimensional disassembled structure of a buffer mechanism in a detachable chair base provided by the disclosure.

In the figures, 1, chair underframe; 2, first supporting mechanism; 21, first support leg; 22, first screw; 23, base plate; 24, positioning bolt; 3, second supporting mechanism; 31, second support leg; 32, second screw; 4, mounting seat; 41, lower connecting plate; 42, upper connecting plate; 43, long rod bolt; 5, connecting mechanism; 51, connecting crossbar; 52, fixed bolt; 53, transverse brace rod; 54, auxiliary supporting frame bar; 6, abutting mechanism; 61, supporting column; 62, insert shaft; 63, movable frame; 64, fixed plate; 65, locking accessory; 651, bayonet lock; 652, rubber gasket; 653, thread rotary knob; 654, gasket; 7, buffer mechanism; 71, clamping block; 72, side plate; 73, vertical plate; 74, buffer spring; 75, page plate; 76, third screw; 77, fixed block; 8, chair frame; 81, chair seat; 82, inner plate; 83, magic tape; and 84, cloth curtain.

DESCRIPTION OF EMBODIMENTS

For the purpose of making the objectives, technical solutions and advantages of the disclosure more clear, further detailed description will be made to the disclosure in conjunction with the drawings and embodiments. It should be understood that the described specific embodiments are merely used to describe the disclosure rather than to limit the disclosure.

Referring to FIGS. 1-7, a detachable chair base, including a chair underframe 1. A first supporting mechanism 2 and a second supporting mechanism 3 clamped in a cross manner are connected to a surface of the chair underframe 1 and a connecting mechanism 5 is mounted above the first supporting mechanism 2 and the second supporting mechanism 3 through a mounting seat 4. The mounting seat 4 includes a lower connecting plate 41. An upper connecting plate 42 is mounted at four corners of the lower connecting plate 41 in an abutted manner through long rod bolts 43. An abutting mechanism 6 is arranged at a central position of a top end of the upper connecting plate 42. The abutting mechanism 6 includes a supporting column 61 connected and fixed to the upper connecting plate 42. An insert shaft 62 is inserted at a top end of the supporting column 61 through a polygonal slot. A movable frame 63 is connected to a top end of the insert shaft 62. A fixed plate 64 is rotatably mounted at a top end of the movable frame 63. A chair frame 8 is mounted at a top end of the fixed plate 64. The chair frame 8 includes a chair seat 81. A bottom end of a sitting surface of the chair seat 81 is abutted and fixed to the fixed plate 64 through a bolt. Two inner plates 82 are symmetrically connected to a right side of a bottom end of the chair seat 81. A magic tape 83 is arranged on the surface of each of the inner plates 82. The magic tape 83 is adhered to a cloth curtain 84, and a top end of the cloth curtain 84 is sutured and abutted to a side of the bottom end of the chair seat 81 through a needle and a thread.

The first supporting mechanism 2 includes a first support leg 21. Both ends of the first support leg 21 are fixed to the surface of the chair underframe 1 through first screws 22. The second supporting mechanism 3 includes a second support leg 31. A tail end of the second support leg 31 is fixed to the surface of the chair underframe 1 through a second screw 32. The second support leg 31 is buckled to a surface of a top end of the first support leg 21, and mounting holes matching with the long rod bolts 43 are formed in surfaces of the first support leg 21 and the second support leg 31.

A positioning bolt 24 is inserted into a crossover position between the first support leg 21 and the second support leg 31 by penetrating a through hole. A shaft end of the positioning bolt 24 is inserted into the lower connecting plate 41 through a thread. A base plate 23 sleeves outside the shaft end of the positioning bolt 24, and the base plate 23 is abutted and buckled to bottom ends of the first support leg 21 and the second support leg 31.

The cross-section of the chair underframe 1 is annular. A plurality of groups of screw holes are equidistantly formed in the surface of the bottom end of the chair underframe 1. Both ends of the first support leg 21 and the second support leg 31 are arc-shaped, with radians being the same as a surface radian of the chair underframe 1.

The connecting mechanism 5 includes a connecting crossbar 51. Mounting holes matching with the long rod bolts 43 are formed in a surface of the connecting crossbar 51, and transverse brace rods 53 are mounted in an abutting manner on both sides of the connecting crossbar 51 through fixed bolts 52.

Top ends of sides of the two transverse brace rods 53 are connected and fixed through an auxiliary supporting frame bar 54. The auxiliary supporting frame bar 54 is located at a bottom end of the sitting surface of the chair seat 81, and limit spacing is arranged between the auxiliary supporting frame bar 54 and the bottom end of the sitting surface of the chair seat 81.

The supporting column 61 and a side of the insert shaft 62 are abutted and fixed through a locking accessory 65. The locking accessory 65 includes a bayonet lock 651. The bayonet lock 651 penetrates through the supporting column 61 and is then inserted into the slot of the insert shaft 62. The bayonet lock 651 is of a U-shaped structure. A rubber gasket 652 is mounted in an embedded manner on a side of a transverse plate end of the bayonet lock 651 through a groove, and the rubber gasket 652 is abutted and adhered to an inner wall of the slot of the insert shaft 62.

A thread rotary knob 653 is rotatably mounted at a central position of the right side of the bayonet lock 651 through a rotation hole. A shaft end of the thread rotary knob 653 is inserted into the supporting column 61 through a threaded hole, and a gasket 654 sleeves outside the shaft end of the thread rotary knob 653.

Two buffer mechanisms 7 are symmetrically arranged on left and right sides of the supporting column 61. Each of the buffer mechanisms 7 includes a clamping block 71. The clamping block 71 is inserted into a side of the supporting column 61 through a limiting groove. A side plate 72 is connected outside the clamping block 71. A vertical plate 73 is connected outside the side plate 72. Two buffer springs 74 are connected to a side of the vertical plate 73. A page plate 75 is connected to a tail end of each of the buffer springs 74. The page plate 75 is fixed to the bottom end of the sitting surface of the chair seat 81. A third screw 76 is inserted into a side of the side plate 72 through a through hole. A shaft end of the third screw 76 is inserted into the fixed block 77 through a threaded hole, and the fixed block 77 is connected and fixed to the supporting column 61.

A steel plate is arranged in the sitting surface of the chair seat 81 to reinforce the chair seat 81 conveniently, so as to prevent the sitting surface of the chair seat 81 from deforming. Moreover, the cloth curtain 84 and the side of the chair seat 81 are sutured with the needle and the thread. During use, the cloth curtain 84 can be lifted to inspect the area under the sitting surface of the chair seat 81, and the disassembly of the structure below the chair seat 81 is convenient. During daily use, the cloth curtain 84 droops, and both sides of the cloth curtain 84 are pressed to adhere the cloth curtain 84 to the magic tapes 83, so that the chair seat 81 and the cloth curtain 84 form a whole, and the cloth curtain 84 is prevented from swinging with wind.

The first support leg 21 can be abutted and fixed to the chair underframe 1 through the first screws 22, so that a top end of the chair underframe 1 and the first support leg 21 form a whole. The groove matching with the first support leg 21 is formed in a bottom end of the second support leg 31, so that the first support leg 21 and the second support leg 31 are combined and fixed conveniently. Moreover, the first support leg 21 and the second support leg 31 are combined to form an arch-shaped structure, which can disperse the downward pressure of the chair seat 81, guaranteeing an upright supporting effect of the chair underframe 1 on the chair seat 81. The positioning bolt 24 penetrates through the first support leg 21 and the second support leg 31 and is then inserted into the threaded hole in a bottom end of the lower connecting plate 41, so that the first support leg 21 and the second support leg 31 can be positioned when being mounted. The first support leg 21 and the base plate 23 rotate on the surface of the positioning bolt 24, so that the through holes of the first support leg 21 and the second support leg 31 be adapted to the screw hole in the surface of the chair underframe 1. By designing the plurality of groups of screw holes in the surface of the bottom end of the chair underframe 1, the first support leg 21 and the second support leg 31 can be conveniently assembled to the chair underframe 1.

Furthermore, the annular structure of the chair underframe 1 is adapted to the arc-shaped ends of the first support leg 21 and the second support leg 31 to limit the first support leg 21 and the second support leg 31, so that the first support leg 21 and the second support leg 31 are prevented from deforming under downward pressure, guaranteeing the supporting stability of the first support leg 21 and the second support leg 31. After the first support leg 21 and the second support leg 31 are assembled, the long rod bolts 43 penetrate through the connecting crossbar 51, the upper connecting plate 42, the lower connecting plate 41, and the first support leg 21 or the second support leg 31 in sequence to assemble and limit the first support leg 21 and the second support leg 31, so that misalignment of the first support leg 21 and the second support leg 31 is avoided. The transverse brace rod 53 can be fixed to the side of the connecting crossbar 51 through the fixed bolts 52, so that the transverse brace rod 53 is locked conveniently. By designing the transverse brace rod 53, it can provide auxiliary support to the bottom end of the chair seat 81 to a certain extent. The left and right transverse brace rods 53 are connected through the auxiliary supporting frame bar 54, so that the supporting area is expanded. There is a distance between the auxiliary supporting frame bar 54 and the sitting surface of the chair seat 81. When the sitting surface of the chair seat 81 inclines, the auxiliary supporting frame bar 54 can support the bottom end of the sitting surface of the chair seat 81, so that the comfort of sitting on the chair seat 81 is guaranteed. Moreover, the auxiliary supporting frame bar 54 limits the maximum inclination angle of the sitting surface of the chair seat 81, preventing the chair seat 81 from tipping over.

When the supporting column 61 is abutted to the insert shaft 62, the insert shaft 62 may be directly inserted into the supporting column 61. The shaft end of the bayonet lock 651 penetrates through the supporting column 61 and is then inserted into the insert shaft 62 for locking, so that the abutting convenience of the insert shaft 62 and the supporting column 61 can be guaranteed. The rubber gasket 652 is embedded into the groove of the bayonet lock 651, so that the rubber gasket 652 abuts against the inner wall of the slot of the insert shaft 62, so that the inserting stability of the bayonet lock 651 is improved. The shaft end of the thread rotary knob 653 abuts against an outer side of the threaded hole of the supporting column 61, and the thread rotary knob 653 is rotated, so that the shaft end of the thread rotary knob 653 moves rotatably in the supporting column 61. The shaft end of the thread rotary knob 653 moves to drive the bayonet lock 651 to move, so as to control a depth to which the bayonet lock 651 is inserted into the slot of the insert shaft 62, guaranteeing the abutting stability of the supporting column 61 and the insert shaft 62. When the side plate 72 is mounted, the clamping block 71 is inserted into the limiting groove of the side of the supporting column 61 from top to bottom, so that the side plate 72 can be preliminarily limited and assembled. Moreover, the third screw 76 penetrates through the side plate 72 and then can be inserted into the threaded hole of the fixed block 77 for locking, so that the mounting stability of the side plate 72 is guaranteed. The buffer springs 74 can support the fixed plate 64. When a user sits on the sitting surface of the chair seat 81, the chair seat 81 inclines slightly. The buffer springs 74 can support and buffer the chair seat 81. When the chair seat 81 loses the pressure, the elastic force of the buffer springs 74 can assist the chair seat 81 to reset.

The working principle is as follows: when the chair underframe 1 needs to be integrally detached, as shown in FIG. 1, FIG. 2, FIG. 3, and FIG. 4, the transverse brace rods 53 can be separated from both ends of the connecting crossbar 51 as the plurality of groups of fixed bolts 52 are detached from the connecting crossbar 51 and the transverse brace rods 53. In this case, the long rod bolts 43 are taken out from surfaces of the fixed bolts 52, so that the connecting crossbar 51 is separated from the upper connecting plate 42 and the lower connecting plate 41 is separated from the first support leg 21 and the second support leg 31. The positioning bolt 24 is rotated, so that the positioning bolt 24 can disengage from the upper connecting plate 42 and the lower connecting plate 41 in sequence, and the upper connecting plates 42 are separated from each other. Furthermore, the positioning bolt 24 is continuously pulled, so that the positioning bolt 24 can disengage from the center positions of the first support leg 21 and the second support leg 31. The first screws 22 and the second screw 32 are taken from the interior of the chair underframe 1, so that the first support leg 21 and the second support leg 31 can be separated from the chair underframe 1;

• • second, as shown in FIG. 6, when the supporting column 61 and the insert shaft 62 are disassembled, the thread rotary knob 653 can be rotated, so that the end shaft of the thread rotary knob 653 gradually disengages from the insert shaft 62 and the supporting column 61 during rotation. With the rotational movement of the thread rotary knob 653, the bayonet lock 651 can be driven to rotate, so that the bayonet lock 651 disengages from the slot of the insert shaft 62 during movement. In this case, the supporting column 61 is pulled downward, so that the supporting column 61 can be separated from the insert shaft 62, and in this case, the chair underframe 1 is completely detached as a whole; and
  • after assembly, when the user sits on the sitting surface of the chair seat 81, with the change of a force receiving point of the sitting surface, the sitting surface of the chair seat 81 can drive the fixed plate 64 to rotate on the surface of the movable frame 63. The fixed plate 64 inclines to drive the page plate 75 to move, so that the page plate 75 on one side extrudes the buffer spring 74. When the sitting surface of the chair seat 81 inclines to a certain inclination angle, the auxiliary supporting frame bar 54 can provide auxiliary support to the sitting surface of the chair seat 81, so as to prevent the chair seat 81 from tipping over due to that fact one side is under force.

The basic principle, main features, and advantages of the disclosure are shown and described above.

In the disclosure, the mounting modes, connecting modes, or arrangement modes of all the above components are common mechanical modes, and the specific structures, models, and coefficient indexes of all the components belong to the BYO technology, as long as beneficial effects thereof can be achieved. Therefore, it is not described in detail herein.

Those skilled in the art shall understand that the disclosure is not subject to limitation of the above-mentioned embodiments. The above-mentioned embodiments and description merely describe the principle of the disclosure. There will be various variations and improvements of the disclosure without departing from the spirit and scope of the disclosure and these variations and improvements shall fall into the claimed scope of the disclosure. The scope claimed by the disclosure is defined by the appended claims and their equivalents.