Detachable Chair Base

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.

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

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.

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:

In the figures,, chair underframe;, first supporting mechanism;, first support leg;, first screw;, base plate;, positioning bolt;, second supporting mechanism;, second support leg;, second screw;, mounting seat;, lower connecting plate;, upper connecting plate;, long rod bolt;, connecting mechanism;, connecting crossbar;, fixed bolt;, transverse brace rod;, auxiliary supporting frame bar;, abutting mechanism;, supporting column;, insert shaft;, movable frame;, fixed plate;, locking accessory;, bayonet lock;, rubber gasket;, thread rotary knob;, gasket;, buffer mechanism;, clamping block;, side plate;, vertical plate;, buffer spring;, page plate;, third screw;, fixed block;, chair frame;, chair seat;, inner plate;, magic tape; and, cloth curtain.

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, a detachable chair base, including a chair underframe. A first supporting mechanismand a second supporting mechanismclamped in a cross manner are connected to a surface of the chair underframeand a connecting mechanismis mounted above the first supporting mechanismand the second supporting mechanismthrough a mounting seat. The mounting seatincludes a lower connecting plate. An upper connecting plateis mounted at four corners of the lower connecting platein an abutted manner through long rod bolts. An abutting mechanismis arranged at a central position of a top end of the upper connecting plate. The abutting mechanismincludes a supporting columnconnected and fixed to the upper connecting plate. An insert shaftis inserted at a top end of the supporting columnthrough a polygonal slot. A movable frameis connected to a top end of the insert shaft. A fixed plateis rotatably mounted at a top end of the movable frame. A chair frameis mounted at a top end of the fixed plate. The chair frameincludes a chair seat. A bottom end of a sitting surface of the chair seatis abutted and fixed to the fixed platethrough a bolt. Two inner platesare symmetrically connected to a right side of a bottom end of the chair seat. A magic tapeis arranged on the surface of each of the inner plates. The magic tapeis adhered to a cloth curtain, and a top end of the cloth curtainis sutured and abutted to a side of the bottom end of the chair seatthrough a needle and a thread.

The first supporting mechanismincludes a first support leg. Both ends of the first support legare fixed to the surface of the chair underframethrough first screws. The second supporting mechanismincludes a second support leg. A tail end of the second support legis fixed to the surface of the chair underframethrough a second screw. The second support legis buckled to a surface of a top end of the first support leg, and mounting holes matching with the long rod boltsare formed in surfaces of the first support legand the second support leg.

A positioning boltis inserted into a crossover position between the first support legand the second support legby penetrating a through hole. A shaft end of the positioning boltis inserted into the lower connecting platethrough a thread. A base platesleeves outside the shaft end of the positioning bolt, and the base plateis abutted and buckled to bottom ends of the first support legand the second support leg.

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

The connecting mechanismincludes a connecting crossbar. Mounting holes matching with the long rod boltsare formed in a surface of the connecting crossbar, and transverse brace rodsare mounted in an abutting manner on both sides of the connecting crossbarthrough fixed bolts.

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

The supporting columnand a side of the insert shaftare abutted and fixed through a locking accessory. The locking accessoryincludes a bayonet lock. The bayonet lockpenetrates through the supporting columnand is then inserted into the slot of the insert shaft. The bayonet lockis of a U-shaped structure. A rubber gasketis mounted in an embedded manner on a side of a transverse plate end of the bayonet lockthrough a groove, and the rubber gasketis abutted and adhered to an inner wall of the slot of the insert shaft.

A thread rotary knobis rotatably mounted at a central position of the right side of the bayonet lockthrough a rotation hole. A shaft end of the thread rotary knobis inserted into the supporting columnthrough a threaded hole, and a gasketsleeves outside the shaft end of the thread rotary knob.

Two buffer mechanismsare symmetrically arranged on left and right sides of the supporting column. Each of the buffer mechanismsincludes a clamping block. The clamping blockis inserted into a side of the supporting columnthrough a limiting groove. A side plateis connected outside the clamping block. A vertical plateis connected outside the side plate. Two buffer springsare connected to a side of the vertical plate. A page plateis connected to a tail end of each of the buffer springs. The page plateis fixed to the bottom end of the sitting surface of the chair seat. A third screwis inserted into a side of the side platethrough a through hole. A shaft end of the third screwis inserted into the fixed blockthrough a threaded hole, and the fixed blockis connected and fixed to the supporting column.

A steel plate is arranged in the sitting surface of the chair seatto reinforce the chair seatconveniently, so as to prevent the sitting surface of the chair seatfrom deforming. Moreover, the cloth curtainand the side of the chair seatare sutured with the needle and the thread. During use, the cloth curtaincan be lifted to inspect the area under the sitting surface of the chair seat, and the disassembly of the structure below the chair seatis convenient. During daily use, the cloth curtaindroops, and both sides of the cloth curtainare pressed to adhere the cloth curtainto the magic tapes, so that the chair seatand the cloth curtainform a whole, and the cloth curtainis prevented from swinging with wind.

The first support legcan be abutted and fixed to the chair underframethrough the first screws, so that a top end of the chair underframeand the first support legform a whole. The groove matching with the first support legis formed in a bottom end of the second support leg, so that the first support legand the second support legare combined and fixed conveniently. Moreover, the first support legand the second support legare combined to form an arch-shaped structure, which can disperse the downward pressure of the chair seat, guaranteeing an upright supporting effect of the chair underframeon the chair seat. The positioning boltpenetrates through the first support legand the second support legand is then inserted into the threaded hole in a bottom end of the lower connecting plate, so that the first support legand the second support legcan be positioned when being mounted. The first support legand the base platerotate on the surface of the positioning bolt, so that the through holes of the first support legand the second support legbe adapted to the screw hole in the surface of the chair underframe. By designing the plurality of groups of screw holes in the surface of the bottom end of the chair underframe, the first support legand the second support legcan be conveniently assembled to the chair underframe.

Furthermore, the annular structure of the chair underframeis adapted to the arc-shaped ends of the first support legand the second support legto limit the first support legand the second support leg, so that the first support legand the second support legare prevented from deforming under downward pressure, guaranteeing the supporting stability of the first support legand the second support leg. After the first support legand the second support legare assembled, the long rod boltspenetrate through the connecting crossbar, the upper connecting plate, the lower connecting plate, and the first support legor the second support legin sequence to assemble and limit the first support legand the second support leg, so that misalignment of the first support legand the second support legis avoided. The transverse brace rodcan be fixed to the side of the connecting crossbarthrough the fixed bolts, so that the transverse brace rodis locked conveniently. By designing the transverse brace rod, it can provide auxiliary support to the bottom end of the chair seatto a certain extent. The left and right transverse brace rodsare connected through the auxiliary supporting frame bar, so that the supporting area is expanded. There is a distance between the auxiliary supporting frame barand the sitting surface of the chair seat. When the sitting surface of the chair seatinclines, the auxiliary supporting frame barcan support the bottom end of the sitting surface of the chair seat, so that the comfort of sitting on the chair seatis guaranteed. Moreover, the auxiliary supporting frame barlimits the maximum inclination angle of the sitting surface of the chair seat, preventing the chair seatfrom tipping over.

When the supporting columnis abutted to the insert shaft, the insert shaftmay be directly inserted into the supporting column. The shaft end of the bayonet lockpenetrates through the supporting columnand is then inserted into the insert shaftfor locking, so that the abutting convenience of the insert shaftand the supporting columncan be guaranteed. The rubber gasketis embedded into the groove of the bayonet lock, so that the rubber gasketabuts against the inner wall of the slot of the insert shaft, so that the inserting stability of the bayonet lockis improved. The shaft end of the thread rotary knobabuts against an outer side of the threaded hole of the supporting column, and the thread rotary knobis rotated, so that the shaft end of the thread rotary knobmoves rotatably in the supporting column. The shaft end of the thread rotary knobmoves to drive the bayonet lockto move, so as to control a depth to which the bayonet lockis inserted into the slot of the insert shaft, guaranteeing the abutting stability of the supporting columnand the insert shaft. When the side plateis mounted, the clamping blockis inserted into the limiting groove of the side of the supporting columnfrom top to bottom, so that the side platecan be preliminarily limited and assembled. Moreover, the third screwpenetrates through the side plateand then can be inserted into the threaded hole of the fixed blockfor locking, so that the mounting stability of the side plateis guaranteed. The buffer springscan support the fixed plate. When a user sits on the sitting surface of the chair seat, the chair seatinclines slightly. The buffer springscan support and buffer the chair seat. When the chair seatloses the pressure, the elastic force of the buffer springscan assist the chair seatto reset.

The working principle is as follows: when the chair underframeneeds to be integrally detached, as shown in,,, and, the transverse brace rodscan be separated from both ends of the connecting crossbaras the plurality of groups of fixed boltsare detached from the connecting crossbarand the transverse brace rods. In this case, the long rod boltsare taken out from surfaces of the fixed bolts, so that the connecting crossbaris separated from the upper connecting plateand the lower connecting plateis separated from the first support legand the second support leg. The positioning boltis rotated, so that the positioning boltcan disengage from the upper connecting plateand the lower connecting platein sequence, and the upper connecting platesare separated from each other. Furthermore, the positioning boltis continuously pulled, so that the positioning boltcan disengage from the center positions of the first support legand the second support leg. The first screwsand the second screware taken from the interior of the chair underframe, so that the first support legand the second support legcan be separated from the chair underframe;

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.