CN214760157U

CN214760157U - Detachable chair leg

Info

Publication number: CN214760157U
Application number: CN202121678726.2U
Authority: CN
Inventors: 王超
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2021-11-19
Anticipated expiration: 2031-07-22

Abstract

The utility model belongs to the technical field of the chair foot, especially, relate to a removable chair foot and assembly method thereof. It has solved the difficult technical problem such as dismouting of current chair foot. The detachable chair leg comprises a plurality of integrated leg pieces which are integrally injection-molded with a center seat, and at least one detachable leg piece which is connected with the center seat through a rotary assembly connecting mechanism, wherein the rotary assembly connecting mechanism comprises a radial supporting arm which is connected with the center seat and extends outwards in the radial direction of the center seat; the rotary connecting shaft is connected to the radial supporting arms and the axial lead of the rotary connecting shaft is transversely distributed; the anti-tripping device is rotationally assembled and connected to the inner end of the detachable foot piece close to the central seat; when the rotating assembly anti-tripping device rotates to the position, the rotating assembly anti-tripping device and the rotating connecting shaft enable the detachable leg piece to be axially locked relative to the center seat. The utility model has the advantages that: the assembly and disassembly are easy, the occupied space is saved, and the transportation and storage cost is reduced.

Description

Detachable chair leg

Technical Field

The utility model belongs to the technical field of the chair foot, especially, relate to a removable chair foot and assembly method thereof.

Background

The chair leg is used for supporting the bottom of the chair.

The chair legs comprise rolling wheel chair legs and non-rolling wheel chair legs, and simultaneously, the chair legs can also comprise metal chair legs and non-metal chair legs.

The chair legs of the prior swivel chair are generally made of metal and non-metal materials. In particular to a non-metal chair leg which is generally made of plastic materials, and five integrated single-leg chair legs are integrally formed by injection molding, so that the efficiency is high and the structural strength is good.

Although the chair foot integrally molded by injection molding has the advantages, the chair foot has the following defects: when the chair legs are packaged, the chair legs occupy larger space volume, so that the transportation and storage cost is higher, and the design is unreasonable.

Secondly, there are some chair legs that adopt the mode of cup jointing each other, and this kind of mode it has removable advantage, but, this kind of mode of cup jointing is unfavorable for the equipment, needs additional screw to fix after the equipment, with the help of the instrument inefficiency and the assembly dismouting operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above problems and provides a detachable chair leg and an assembling method thereof, which can solve the technical problems.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

this removable chair foot includes a plurality of integrative foot pieces with the integrative injection moulding of center seat, and at least one with the center seat passes through the removable foot piece that rotatory equipment coupling mechanism is connected, rotatory equipment coupling mechanism include:

the radial supporting arm is connected with the central seat and extends outwards in the radial direction of the central seat;

the rotary connecting shaft is connected to the radial supporting arms and the axial lead of the rotary connecting shaft is transversely distributed;

the rotary assembly anti-tripping device is connected to the inner end, close to the center seat, of the detachable foot piece, downwards buckled on the rotary connecting shaft from the upper side of the rotary connecting shaft and driven by an external acting force to enable the rotary assembly anti-tripping device to rotate to the position anticlockwise or clockwise around the axis of the rotary connecting shaft;

when the rotating assembly anti-tripping device rotates to the position, the rotating assembly anti-tripping device and the rotating connecting shaft enable the detachable leg piece to be axially locked relative to the center seat.

In the detachable chair leg, the rotary assembly anti-tripping device is provided with an arc groove matched with the rotary connecting shaft, the notch of the arc groove faces the outer end of the detachable leg piece, and the lower side groove wall of the arc groove is attached to the lower side cylindrical surface on one side, close to the center seat, of the rotary connecting shaft when the rotary assembly anti-tripping device is rotated to the position.

In the detachable chair leg, the rotary assembly anti-tripping device is connected to the middle position in one end of the detachable leg piece close to the center seat, and space spaces are reserved between two surfaces in the thickness direction of the rotary assembly anti-tripping device and two corresponding side walls in the detachable leg piece.

In foretell removable chair foot, rotatory equipment anti-tripping close to one side of center seat have the evagination restriction card portion of protrusion in removable leg piece interior terminal surface, the circumference at center seat has the evagination base, radial support arm connect in the evagination base one end of keeping away from center seat to the one end of keeping away from center seat at the evagination base be equipped with evagination restriction card portion complex indent restriction draw-in groove, work as rotatory equipment anti-tripping equipment is rotatory when targetting in place evagination restriction card portion stretches into and is fixed in the indent restriction draw-in groove.

In foretell detachable chair foot, radial support arm have two and be parallel to each other, swivelling joint axle one end is connected in one of them radial support arm and is kept away from the one end of evagination base, the other end of swivelling joint axle is connected in the one end that evagination base was kept away from to another radial support arm, works as when swivelling joint equipment anti-tripping assembly is rotatory when targetting in place radial support arm card in the interval space, form vertical inner space between evagination base, two radial support arms and the swivelling joint axle, rotatory assembly anti-tripping enters into to vertical inner space in from the upside of vertical inner space, notch and the vertical inner space intercommunication of indent restriction draw-in groove.

In the above detachable chair leg, the detachable leg piece has an upper inclined plane inside the end provided with the rotation assembly anti-tripping device and respectively located in the space, and a lower inclined plane matched with the upper inclined plane is respectively arranged on the upper side of each radial supporting arm.

In the above detachable chair leg, the inner end surface of the detachable leg piece provided with the rotation assembly anti-tripping device is a first U-shaped inclined surface, the outer end surface of the outer convex base provided with the radial support arm is provided with a second U-shaped inclined surface matched with the first U-shaped inclined surface, and the first U-shaped inclined surface and the second U-shaped inclined surface are inverted U-shaped surfaces.

In the detachable chair leg, when the rotating assembly anti-tripping device rotates to the position, the upper side groove wall of the arc groove is attached to the upper side cylindrical surface of one side of the rotating connecting shaft, which is close to the center seat.

In the above detachable chair leg, the caliber of the arc groove is equal to or larger than the diameter of the rotary connecting shaft.

A method of assembling a detachable chair leg, the method comprising the steps of:

s1, preparing a plurality of integrated foot pieces which are integrally injection-molded with the center seat and a detachable foot piece;

s2, the inner end of the detachable leg piece rotates to assemble the anti-tripping aligning rotating connecting shaft and enables the rotating assembling anti-tripping clamping sleeve to be sleeved on the rotating connecting shaft;

s3, the rotation assembly anti-tripping device is driven by external acting force to rotate around the transverse axial lead of the rotation connecting shaft anticlockwise or clockwise to a proper position, when the rotation assembly anti-tripping device rotates to the proper position, the first U-shaped inclined surface and the second U-shaped inclined surface are matched together, the upper inclined surface and the lower inclined surface are matched together, the convex limiting clamping part is clamped and fixed in the concave limiting clamping groove, and the detachable foot pieces and the integrated foot pieces are uniformly distributed in a circumferential mode after assembly.

Compared with the prior art, the utility model has the advantages of:

1. the swivelling joint axle plays the effect of position location, and rotatory equipment anti-tripping's design in coordination can ensure that removable foot piece uses the swivelling joint axle to assemble as swivelling joint point, ensures removable foot piece mounted position uniqueness and accuracy, and simultaneously, the mutually supporting of swivelling joint axle and rotatory equipment anti-tripping can prevent phenomenons such as drop with removable foot piece axial locking, utilizes rotatory equipment can also further improve the packaging efficiency to and subsequent dismantlement efficiency.

When the anti-tripping device is assembled in a rotating mode, the detachable foot pieces abut against the center seat, and therefore the phenomena that the connection parts of the chair feet drop and crack when bearing the weight can be avoided.

2. The design of evagination restriction card portion and indent restriction draw-in groove it can promote the bearing capacity of junction, simultaneously, can also play the restriction effect of rotatory position to guarantee the uniformity of removable foot piece equipment after targetting in place, and this kind of combination design can prevent that rotatory equipment from preventing the axial displacement of threading off along the swivelling joint axle, and the locking is more reliable and more stable.

3. At least one removable foot piece designs it and can dwindles the occupation space volume by a wide margin, can save transportation and storage cost, simultaneously, the assembly and disassembly only need manual operation can, nimble and convenient simple.

Drawings

Fig. 1 is a schematic view of a detachable chair leg structure provided by the present invention.

Fig. 2 is an enlarged schematic view taken along line a-a in fig. 1.

FIG. 3 is a schematic view of the detachable leg piece in a large-angle inclined state before being assembled counterclockwise.

FIG. 4 is a schematic view of the detachable leg piece in a large-angle inclined state before clockwise assembly.

Fig. 5 is a schematic view of a three-dimensional structure of a detachable leg piece provided by the present invention.

Fig. 6 is a schematic view of the explosion structure of the detachable chair leg provided by the present invention.

Fig. 7 is a schematic structural view of the four integrated leg pieces and the center seat integrally formed.

Fig. 8 is a schematic view of the detachable leg pieces removed and installed in the packing box of the present invention.

Fig. 9 is a schematic structural diagram of the second embodiment of the present invention.

In the figure, a center seat 1, a convex base 10, a second U-shaped inclined plane 100, an inward concave limiting clamping groove 11, an integrated leg piece 2, a rotating assembly connecting mechanism 3, a radial supporting arm 30, a lower inclined plane 300, a rotating connecting shaft 31, a rotating assembly anti-tripping device 32, an arc groove 320, a lower groove wall 321, an upper groove wall 322, a convex limiting clamping part 33, a detachable leg piece 4, an upper inclined plane 41, a first U-shaped inclined plane 42, a roller 5 and a vertical inner space a.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in figure 1, the detachable chair leg comprises a plurality of integrated leg pieces 2 which are integrally injection-molded with a center seat 1, and a detachable leg piece 4 which is connected with the center seat 1 through a rotating assembly connecting mechanism 3, as shown in figure 5, the transverse section of the detachable leg piece 4 is U-shaped, and in order to improve the structural strength, a reinforcing rib 43 is arranged in a U-shaped groove of the detachable leg piece 4.

Integrative foot piece 2 quantity is four, removable foot piece 4 and integrative foot piece 2 are circumference evenly distributed to play the support purpose.

The center of the center seat 1 is provided with a vertical shaft hole to facilitate the assembly of the seat cushion shaft.

As shown in fig. 2 to 7, the rotating assembly connecting mechanism 3 includes:

a radial support arm 30 connected to the center base 1 and extended radially outward of the center base 1; the outward extension of the radial support arms 30 facilitates insertion into the inner ends of the removable legs 4 to improve the strength of the connection.

The rotating connecting shaft 31 is connected to the radial supporting arm 30, and the axial lead of the rotating connecting shaft 31 is transversely distributed; the rotation connecting shaft 31 serves the purpose of positioning and retaining to ensure the strength of the connecting structure with the detachable leg piece 4.

The radial supporting arm 30, the rotating connecting shaft 31 and the center base 1 are integrally formed in an injection molding mode, and production efficiency and structural strength are guaranteed.

The rotating assembly anti-tripping device 32 is connected to the inner end, close to the center base 1, of the detachable foot piece 4, the rotating assembly anti-tripping device 32 of the detachable foot piece 4 is downwards buckled on the rotating connecting shaft 31 from the upper side of the rotating connecting shaft 31, and the rotating assembly anti-tripping device 32 rotates to a position around the axis line of the rotating connecting shaft 31 anticlockwise or clockwise under the driving of external acting force;

when rotating anticlockwise: the bottom surface of the central seat 1 faces downwards, for example figure 3;

when rotating clockwise: the bottom surface of the central seat 1 is upward, for example, fig. 4;

when the rotating assembly anti-tripping device 32 is rotated to the position, the rotating assembly anti-tripping device 32 and the rotating connecting shaft 31 enable the detachable foot piece 4 to be locked axially relative to the central seat 1.

The rotary connecting shaft 31 plays a role in positioning, and due to the design of the cooperative rotary assembly anti-tripping device 32, the detachable foot pieces 4 can be assembled as rotary connecting points by using the rotary connecting shaft 31, the uniqueness and accuracy of the installation positions of the detachable foot pieces 4 are ensured, and meanwhile, the mutual matching of the rotary connecting shaft 31 and the rotary assembly anti-tripping device 32 can lock the detachable foot pieces 4 in the axial direction, so that the detachment and the like can be prevented, the assembly efficiency can be further improved by using the rotary assembly, and the subsequent disassembly efficiency is improved.

Secondly, this embodiment need not to fix the screw that adds outward to and need not to carry out the dismouting with the help of the instrument to the bolt, easy dismounting and simple, in order to control and use more nimble convenience.

At least one detachable foot piece is designed to greatly reduce the occupied space and save the transportation and storage cost, such as shown in fig. 9.

When the rotation assembly anti-tripping device 32 rotates in place, the detachable foot piece 4 abuts against the center seat, and the phenomena of dropping and cracking and the like at the joint of the chair foot during bearing can be prevented.

The rotation angle of the rotating assembly anti-tripping device 32 of the embodiment is an acute angle.

Further, as shown in fig. 2 and fig. 5 to 8, the rotation assembly anti-trip device 32 has an arc groove 320 matching with the rotation connection shaft 31, the arc groove 320 is a C-shaped groove, a notch of the arc groove 320 faces an outer end of the detachable leg piece 4 so as to be clamped on the rotation connection shaft 31 and play a role of anti-trip, and when the rotation assembly anti-trip device 32 rotates to a proper position, a lower side groove wall 321 of the arc groove 320 fits against a lower side cylindrical surface of the rotation connection shaft 31 on a side close to the center base 1.

When the rotation assembly anti-tripping device 32 rotates to the proper position, the upper groove wall 322 of the circular arc groove 320 fits the upper cylindrical surface of the rotation connecting shaft 31 on the side close to the center seat 1. The circumference of the matching contact surface of the arc groove 320 and the rotation connecting shaft 31 is smaller than or equal to the half circumference of the rotation connecting shaft 31, and the upper groove wall 322 is located above the lower groove wall 321 when the rotation assembly is in place, for example, above the right side of fig. 2 in this embodiment. The offset design can facilitate assembly and disassembly and can prevent interference.

The caliber of the arc groove 320 is equal to or larger than the diameter of the rotary connecting shaft 31. This design may facilitate nesting and un-nesting.

The lower groove wall 321 fits the lower cylindrical surface of the rotating connecting shaft 31 near the center seat 1, and the contact surface between the lower groove wall 321 and the rotating connecting shaft 31 is enlarged to play a role in preventing the rotation of the rotating assembly anti-tripping device 32 in place, that is, when the chair leg bears the load, the lower groove wall 321 can bear the lower cylindrical surface.

Secondly, the rotary assembly anti-tripping device 32 is connected to the middle position in one end of the detachable foot piece 4 close to the center seat 1, space spaces are reserved between two surfaces in the thickness direction of the rotary assembly anti-tripping device 32 and two corresponding side walls in the detachable foot piece 4, and the design of the space spaces can be beneficial to demolding of the detachable foot piece and function expansion application.

In addition, as shown in fig. 2 and fig. 5-8, one side of the rotation assembly release preventer 32 close to the center seat 1 is provided with a convex limiting clip part 33 protruding from the inner end surface of the detachable leg piece 4, a convex base 10 is provided in the circumferential direction of the center seat 1, the radial support arm 30 is connected to one end of the convex base 10 away from the center seat 1, and one end of the convex base 10 away from the center seat 1 is provided with a concave limiting clip groove 11 matching with the convex limiting clip part 33, and the convex limiting clip part 33 protrudes into and is fixed in the concave limiting clip groove 11 when the rotation assembly release preventer 32 is rotated to the proper position.

The groove depth of the indent restriction card slot 11 is gradually deepened from top to bottom, the convex restriction card portion 33 enters the indent restriction card slot 11 from the upper side of the indent restriction card slot 11 with an inclination angle and is downwards clamped in place along the indent restriction card slot 11, the bearing performance of the joint can be improved by the design of the convex restriction card portion 33 and the indent restriction card slot 11, and meanwhile, the restriction effect of rotating to the place can be further played, the consistency of the detachable foot piece after being assembled in place is ensured, and the axial movement of the anti-tripping device 32 along the rotating connecting shaft 31 can be prevented by the combined design, and the locking is more stable and reliable.

Preferably, the groove bottom of the concave limiting clamping groove 11 of the present embodiment is a plane, and the convex limiting clamping portion 33 has a matching plane matched with the plane, so as to ensure the connection stability.

Secondly, the radial support arms 30 of the embodiment are two and parallel to each other, one end of the rotating connecting shaft 31 is connected to one end of one radial support arm 30 away from the convex base 10, the other end of the rotating connecting shaft 31 is connected to one end of the other radial support arm 30 away from the convex base 10, and when the rotating assembly anti-tripping device 32 is assembled and rotated in place, the radial support arms 30 are clamped in the space, so that the assembly in place is ensured, and the structural strength is further improved.

A vertical inner space a is formed among the convex base 10, the two radial supporting arms 30 and the rotating connecting shaft 31, the rotating assembly anti-tripping device 32 enters the vertical inner space from the upper side of the vertical inner space, and the notch of the concave limiting clamping groove 11 is communicated with the vertical inner space a.

The two ends of the rotating connecting shaft 31 can be fixed by the aid of the two radial supporting arms 30, and meanwhile, bearing performance can be further improved by the aid of the structure when bearing, and using requirements of people with different weights can be met.

Preferably, the detachable leg piece 4 is provided with an upper inclined surface 41 inside the end thereof provided with the rotation assembly release preventing mechanism 32, and a lower inclined surface 300 matching with the upper inclined surface 41 is provided on the upper side of each radial supporting arm 30.

The mating of the upper inclined surface 41 and the lower inclined surface 300 may further enhance the load bearing performance and further limit the limit of rotational assembly into place.

Secondly, be equipped with a plurality of evenly spaced strengthening rib pieces in every interval space respectively, be equipped with above-mentioned inclined plane 41 on every strengthening rib piece respectively, the last inclined plane 41 be located same inclined plane to prevent that the high low level of each other from leading to the equipment can't rotate to the position. Or a whole reinforcing rib plate is respectively arranged in each space, and the upper inclined surface 41 is arranged on the reinforcing rib plate.

In addition, the end surface of the inner end of the detachable foot piece 4 provided with the rotation assembly anti-tripping device 32 is a first U-shaped inclined surface 42, the outer end surface of the outer convex base 10 provided with the radial supporting arm 30 is provided with a second U-shaped inclined surface 100 matched with the first U-shaped inclined surface 42, and the first U-shaped inclined surface 42 and the second U-shaped inclined surface 100 are both inverted U-shaped surfaces. The design of the first U-shaped inclined surface 42 and the second U-shaped inclined surface 100 can also play a role in improving the bearing performance and limiting the rotation assembly in place.

In order to facilitate the assembly and disassembly, first rounded corners are respectively arranged at two ends of the first U-shaped inclined plane 42, and arc concave matching surfaces matched with the first rounded corners are respectively arranged at two ends of the second U-shaped inclined plane 100.

As shown in fig. 2-8, the method of assembling the detachable chair leg comprises the following steps:

s1, preparing a plurality of integrated leg pieces 2 which are integrally injection-molded with the center base 1 and a detachable leg piece 4;

s2, aligning the rotating assembly anti-tripping device 32 at the inner end of the detachable leg piece 4 with the rotating connecting shaft 31 and enabling the rotating assembly anti-tripping device 32 to be clamped on the rotating connecting shaft 31;

s3, the rotation assembly anti-trip device 32 is driven by the external force to rotate around the transverse axis of the rotation connection shaft 31 counterclockwise or clockwise to a proper position, when the rotation assembly anti-trip device is rotated to the proper position, the first U-shaped inclined surface 42 and the second U-shaped inclined surface 100 are engaged together, the upper inclined surface 41 and the lower inclined surface 300 are engaged together, the outer convex limiting clamp portion 33 is clamped and fixed in the inner concave limiting clamp slot 11, and the detachable leg pieces 4 and the integrated leg pieces 2 are circumferentially and uniformly distributed after the assembly.

Preferably, the number of the detachable foot pieces of the present embodiment is 1-4. As can be seen from fig. 9, the height of the packing box of the embodiment is obviously lower than that of a five-star-foot packing box which cannot be disassembled by five feet.

Example two

As shown in figures 1 and 9, a roller chair leg has a detachable chair leg as described in the first embodiment, and a roller 5 mounted on the underside of the outer ends of an integral leg piece 2 and a detachable leg piece 4.

EXAMPLE III

A swivel chair is provided with the roller chair leg, a cushion assembly and a backrest assembly which are arranged on the roller chair leg.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. Removable chair foot, including a plurality of integrative foot pieces (2) with center seat (1) integrative injection moulding, and at least one with removable foot piece (4) that center seat (1) is connected through rotatory equipment coupling mechanism (3), its characterized in that, rotatory equipment coupling mechanism (3) include:

a radial support arm (30) connected to the central seat (1) and extending radially outward of the central seat (1);

the rotary connecting shaft (31) is connected to the radial supporting arm (30) and the axial lead of the rotary connecting shaft (31) is transversely distributed;

the rotary assembly anti-tripping device (32) is connected to the inner end, close to the center seat (1), of the detachable foot piece (4), the rotary assembly anti-tripping device (32) of the detachable foot piece (4) is downwards buckled on the rotary connecting shaft (31) from the upper side of the rotary connecting shaft (31), and the rotary assembly anti-tripping device (32) rotates to a position anticlockwise or clockwise around the axis of the rotary connecting shaft (31) under the driving of an external acting force;

when the rotating assembly anti-tripping device (32) rotates to the position, the rotating assembly anti-tripping device (32) and the rotating connecting shaft (31) enable the detachable foot piece (4) to be locked relative to the central seat (1) in the axial direction.

2. The detachable chair leg as claimed in claim 1, wherein said rotating assembly release preventing element (32) has a circular arc groove (320) matching with the rotating connecting shaft (31), the notch of the circular arc groove (320) faces the outer end of the detachable leg piece (4), and the lower side groove wall (321) of the circular arc groove (320) fits against the lower side cylindrical surface of the rotating connecting shaft (31) on the side close to the center seat (1) when the rotating assembly release preventing element (32) is rotated into position.

3. The detachable chair leg as claimed in claim 1, wherein said pivotally assembled anti-release mechanism (32) is connected to the detachable leg piece (4) at a position in the middle of the inside of one end of the central seat (1), and a space is left between the two surfaces of the pivotally assembled anti-release mechanism (32) in the thickness direction and the corresponding two side walls of the inside of the detachable leg piece (4).

4. The detachable chair leg as claimed in claim 3, wherein the side of the rotation assembly release preventing mechanism (32) close to the center base (1) is provided with a convex limiting clip portion (33) protruding from the inner end surface of the detachable leg piece (4), the circumference of the center base (1) is provided with a convex base (10), the radial supporting arm (30) is connected to one end of the convex base (10) far away from the center base (1), one end of the convex base (10) far away from the center base (1) is provided with a concave limiting clip groove (11) matching with the convex limiting clip portion (33), and the convex limiting clip portion (33) protrudes into and is fixed in the concave limiting clip groove (11) when the rotation assembly release preventing mechanism (32) is rotated to the proper position.

5. The detachable chair foot according to claim 4, characterised in that said radial supporting arms (30) are two and parallel to each other, one end of the rotating connecting shaft (31) is connected with one end of one radial supporting arm (30) far away from the convex base (10), the other end of the rotating connecting shaft (31) is connected with one end of the other radial supporting arm (30) far away from the convex base (10), when the rotary assembly release preventer (32) is assembled and rotated to the position, the radial supporting arms (30) are clamped in the space, a vertical inner space (a) is formed among the convex base (10), the two radial supporting arms (30) and the rotating connecting shaft (31), the rotating assembly anti-tripping device (32) enters the vertical inner space from the upper side of the vertical inner space, and the notch of the concave limiting clamping groove (11) is communicated with the vertical inner space (a).

6. The detachable chair leg as claimed in claim 5, wherein the detachable leg piece (4) has an upper inclined surface (41) formed inside the end thereof provided with the rotation assembly release preventing mechanism (32) and a lower inclined surface (300) formed on the upper side of each radial supporting arm (30) and engaged with the upper inclined surface (41).

7. The detachable chair leg as claimed in claim 4, wherein the inner end surface of the detachable leg piece (4) provided with the rotation assembly release preventing mechanism (32) is a first U-shaped inclined surface (42), the outer end surface of the outer convex base (10) provided with the radial supporting arm (30) is provided with a second U-shaped inclined surface (100) matched with the first U-shaped inclined surface (42), and the first U-shaped inclined surface (42) and the second U-shaped inclined surface (100) are both inverted U-shaped surfaces.

8. The detachable chair leg according to claim 2, characterized in that the upper side groove wall (322) of said circular arc groove (320) fits against the upper side cylindrical surface of the side of the rotation connecting shaft (31) close to the central seat (1) when the rotation assembly anti-tripping device (32) is rotated into position.

9. The detachable chair foot according to claim 8, characterised in that the mouth diameter of the circular arc groove (320) is equal to or greater than the diameter of the rotation connection shaft (31).