Detachable chair leg

Abstract

The utility model relates to a detachable chair leg, which is used for solving the technical problems that a five-star chair leg in the prior art needs to be fixed on a central tube through a bolt in the background technology, and when a user installs the chair leg and the central tube, the user is difficult to install the chair leg on the central tube when no proper tool is used. Comprising a central seat, a plurality of mounting parts and a plurality of chair legs, the plurality of mounting parts are uniformly distributed on the circumferential outer wall of the central seat at equal intervals, a clamping groove extending in the axial direction is formed in the bottom surface of each mounting part, and first limiting grooves are symmetrically formed in the inner walls of the left side and the right side of each clamping groove; clamping heads matched with the clamping grooves in shape are fixedly arranged at the ends of the chair legs, first limiting protrusions matched with the first limiting grooves are fixedly arranged on the outer walls of the left side and the right side of each clamping head, second limiting grooves located in the bottoms of the clamping grooves are further formed in the clamping grooves, and second limiting protrusions matched with the second limiting grooves are fixedly arranged at the ends of the clamping heads.

Description

TECHNICAL FIELD

[0001] The utility model relates to a seat processing technical field, concretely relates to a detachable chair leg. BACKGROUND

[0002] Five-star chair leg refers to the supporting structure at the bottom of a chair, usually composed of five legs, shaped like a star. This design is commonly seen in office chairs, computer chairs and other seats that require stable support. The design of five-star chair legs can provide better balance and support, making the chair more stable and reducing the risk of tipping over.

[0003] One of the prior art chair legs, such as the utility model patent document with the authorized announcement number "CN221830298U" and the patent name "a chair leg center seat and a five-star chair leg", discloses a chair leg, which includes a center tube. On the outer circumferential surface of the center tube, there are at least three circumferentially evenly distributed leg piece sleeve pipes. The leg piece sleeve pipe is made of a piece of metal plate material through curling. On the outer wall of the end of the leg piece sleeve pipe close to the center tube, there is a leg piece sleeve limiting protrusion protruding radially outward from the leg piece sleeve pipe.

[0004] In the above patent document, the chair leg needs to be fixed on the center tube by bolts. When the user installs the chair leg and the center tube, it is difficult for the user to install the chair leg on the center tube without proper tools. UTILITY MODEL CONTENT

[0005] The utility model aims at the deficiencies of the prior art and proposes a detachable chair leg to solve the technical problem of the five-star chair leg of the prior art mentioned in the background art, which needs to be fixed on the center tube by bolts. When the user installs the chair leg and the center tube, it is difficult for the user to install the chair leg on the center tube without proper tools.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions:

[0007] A detachable chair leg, comprising a center seat, a plurality of mounting portions and a plurality of chair legs, the circumferential outer wall of the center seat is uniformly and equidistantly distributed with a plurality of mounting portions, the bottom surface of each mounting portion is provided with an axially extending clamping groove, the left and right side inner walls of the clamping groove are symmetrically provided with a first limiting groove, the end of a plurality of chair legs is fixedly provided with a clamping head matched with the shape of the clamping groove, the left and right side outer walls of the clamping head are fixedly provided with a first limiting protrusion matched with the first limiting groove, and a second limiting groove located at the groove bottom is further provided in the clamping groove, and the end of the clamping head is fixedly provided with a second limiting protrusion matched with the second limiting groove, when the chair leg is installed at an inclined angle α, the second limiting protrusion is embedded in the second limiting groove, and the first limiting protrusion is aligned with the entrance of the first limiting groove, then the chair leg is rotated to make the first limiting protrusion slide along the first limiting groove to a locking position, at this time, the side surface of the second limiting protrusion is in surface contact with the inner wall of the second limiting groove.

[0008] Working principle:

[0009] First, the chair leg axis and the center seat axis form a specific inclined angle α (preferably 45°±5°), at this time, the second limiting protrusion at the end of the clamping head is aligned with the second limiting groove at the bottom of the clamping groove, and the first limiting protrusion is located above the entrance of the first limiting groove, then the user applies pressure towards the chair leg, so that the second limiting protrusion is completely embedded in the second limiting groove, and the inner wall of the second limiting groove is in complete abutment with the inner wall of the second limiting protrusion, when the second limiting protrusion enters the second limiting groove, the first limiting protrusion moves along the first limiting groove, when the inner wall of the second limiting groove is in complete abutment with the inner wall of the second limiting protrusion, the outer wall of the first limiting protrusion is in complete abutment with the inner wall of the first limiting groove, thereby completing the installation of the chair leg and the mounting seat, and then the user can install the chair leg on the center seat in sequence.

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

[0011] First, through the cooperation of the second limiting protrusion and the second limiting groove, self-alignment positioning is realized when the chair leg is inserted at an inclined angle α (45°±5°), and the artificial calibration step is eliminated.

[0012] Second, when the first limiting protrusion slides along the first limiting groove to the terminal position, a clamping structure is formed, thereby completing the mechanical self-locking of the chair leg and the mounting seat. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The structure schematic view of the embodiment of the utility model;

[0014] Figure 2 The assembly structure schematic view of the center seat and the mounting seat;

[0015] Figure 3 It is the assembly structure diagram of chair leg and card joint;

[0016] Figure 4 It is the top view structure diagram of card joint.

[0017] The center seat 1, the mounting portion 2, the chair leg 3, the card joint 4, the first limiting slot 5, the card joint 6, the first limiting protrusion 7, the second limiting slot 8, the second limiting protrusion 9, the first arc surface 10, the second arc surface 11, the first placement slot 12, the first placement block 13, the third limiting protrusion 14, the third limiting slot 15, the inclined surface 16, the third arc surface 17, the fourth limiting protrusion 18, the fourth limiting slot 19, the fourth arc surface 20, the through hole 21, the bolt 22, the through hole 23, the mounting hole 24 are explained. DETAILED DESCRIPTION

[0018] The technical scheme in the utility model is further explained below in combination with the drawings and examples.

[0019] Examples:

[0020] As Figure 1 and Figure 2 and Figure 3 and Figure 4 As shown in the figure, a detachable chair leg includes a center seat 1, a plurality of mounting portions 2 and a plurality of chair legs 3, the circumferential outer wall of the center seat 1 is uniformly and equidistantly distributed with a plurality of mounting portions 2, the bottom surface of each mounting portion 2 is provided with an axially extending card joint slot 4, the left and right inner walls of the card joint slot 4 are symmetrically provided with a first limiting slot 5, the end portion of the plurality of chair legs 3 is fixedly provided with a card joint 6 matched with the shape of the card joint slot 4, the left and right outer walls of the card joint 6 are fixedly provided with a first limiting protrusion 7 matched with the first limiting slot 5, the first limiting slot 5 is a trapezoidal structure and the width of the first limiting slot 5 gradually decreases from outside to inside, forming a guiding structure with a wide outside and a narrow inside, through the setting of the trapezoidal first limiting slot 5, the first limiting protrusion 7 is facilitated to slide into the first limiting slot 5, the abutting surface between the outer wall of the first limiting protrusion 7 and the inner wall of the first limiting slot 5 is a first arc surface 10, through the setting of the first arc surface 10, the smoothness is improved when the first limiting protrusion 7 slides in the first limiting slot 5, avoiding local jamming of the structure.

[0021] As Figure 2 and Figure 3 and Figure 4As shown, the second limiting groove 8 is arranged at the bottom of the clamping groove 4, the end of the clamping head 6 is fixedly provided with a second limiting protrusion 9 matched with the second limiting groove 8, the end of the second limiting protrusion 9 is a second arc surface 11, the second limiting protrusion 9 is facilitated to move in the clamping groove 4 through the arrangement of the second arc surface 11, so that the second limiting protrusion 9 is facilitated to enter the second limiting groove 8, a first placing groove 12 is arranged on the second arc surface 11, and two arc-shaped first placing blocks 13 are fixedly arranged in the second limiting groove 8, the two first placing blocks 13 are located in the first placing groove 12, and the outer walls of the two first placing blocks 13 abut against the inner wall of the first placing groove 12, the second limiting protrusion 9 in the second limiting groove 8 is further fixed through the cooperation of the two first placing blocks 13 and the first placing groove 12, and the stability of the local structure is improved.

[0022] As shown in Figure 2 and Figure 3 and Figure 4 As shown, when the chair leg 3 is installed at the inclined angle α, the second limiting protrusion 9 is embedded in the second limiting groove 8, and the first limiting protrusion 7 is aligned with the entrance of the first limiting groove 5, then the chair leg 3 is rotated to make the first limiting protrusion 7 slide along the first limiting groove 5 to the locking position, at this time, the side surface of the second limiting protrusion 9 forms a surface contact with the inner wall of the second limiting groove 8.

[0023] As shown in Figure 2 and Figure 3 and Figure 4 As shown, two third limiting protrusions 14 are fixedly arranged in each clamping groove 4, two third limiting grooves 15 are arranged on each clamping head 6, the two third limiting grooves 15 are matched with the two third limiting protrusions 14 one by one, the side of the third limiting protrusion 14 close to the second limiting groove 8 is a slope 16, and the side of the third limiting groove 15 close to the second limiting protrusion 9 is a third arc surface 17, the third limiting protrusion 14 is facilitated to move in the third limiting groove 15 through the cooperation of the slope 16 and the third arc surface 17, so that the strength of the structure is improved, and the third arc surface 17 of the third limiting groove 15 abuts against the slope 16 of the third limiting protrusion 14.

[0024] As shown in Figure 2 and Figure 3 and Figure 4As shown, the fourth limiting protrusion 18 is fixed between the two third limiting protrusions 14, the fourth limiting protrusion 18 is fixed on the inner wall of the clamping groove 4, the fourth limiting groove 19 is opened on the clamping head 6, the fourth limiting groove 19 is clamped with the fourth limiting protrusion 18, and the abutting surface of the fourth limiting groove 19 and the fourth limiting protrusion 18 is the fourth arc surface 20, which can facilitate the sliding of the fourth limiting protrusion 18 into the fourth limiting groove 19, thereby improving the strength of the structure, the through hole 21 is opened on the clamping head 6, the bolt 22 is arranged on the clamping head 6, and the bolt 22 is threadedly connected with the fourth limiting protrusion 18 by sliding through the through hole 21, thereby reinforcing the local structure through the cooperation of the bolt 22 and the fourth limiting protrusion 18, preventing the structure from loosening.

[0025] As shown in the figure, Figure 1 The central seat 1 is provided with a through hole 23 penetrating the upper and lower surfaces, which is used to connect the seat support part, and the through hole 23 can facilitate the installation of structures such as air rods, and each chair leg 3 is provided with a mounting hole 24 for installing a caster at the end away from the central seat 1, and the caster structure can be installed through the mounting hole 24.

[0026] Working principle:

[0027] The user aligns the clamping head 6 of the chair leg 3 with the clamping groove 4 of the mounting part 2 at an inclined angle α (preferably 45°±5°), at this time the second limiting protrusion 9 at the end of the clamping head 6 is aligned with the second limiting groove 8 at the bottom of the clamping groove 4, and the first limiting protrusion 7 is located above the entrance of the first limiting groove 5, then the user applies pressure towards the chair leg 3, so that the second limiting protrusion 9 is completely embedded in the second limiting groove 8, and the inner wall of the second limiting groove 8 is in complete abutment with the inner wall of the second limiting protrusion 9, when the second limiting protrusion 9 enters the second limiting groove 8, the first limiting protrusion 7 slides in the trapezoidal guide structure of the first limiting groove 5, because the width of the first limiting groove 5 gradually decreases from the outside to the inside, the first arc surface 10 of the first limiting protrusion 7 is gradually extruded with the groove wall, and the friction force gradually increases, until it slides to the locking position at the bottom of the groove, when the inner wall of the second limiting groove 8 is in complete abutment with the inner wall of the second limiting protrusion 9, the outer wall of the first limiting protrusion 7 is in complete abutment with the inner wall of the first limiting groove 5.

[0028] At the same time, the third limiting groove 15 of the clamping head 6 cooperates with the third limiting protrusion 14 in the clamping groove 4: the inclined surface 16 of the third limiting protrusion 14 closely abuts with the third arc surface 17 of the third limiting groove 15, thereby limiting the axial displacement of the chair leg 3.

[0029] In the process of rotating and pressing the chair leg 3, the fourth limiting protrusion 18 in the clamping groove 4 is synchronously embedded into the fourth limiting groove 19 of the clamping head 6, the fourth arc surface 20 of the fourth limiting groove 19 forms surface contact with the side surface of the fourth limiting protrusion 18, further limiting the circumferential rotation freedom of the chair leg 3, at this time, the side surface of the second limiting protrusion 9 completely matches the inner wall of the second limiting groove 8, forming axial locking.

[0030] For the scene that needs to bear greater load, the operator can insert the bolt 22 through the through hole 21, make it pass through the clamping head 6 and be connected with the threaded hole of the fourth limiting protrusion 18, after tightening the bolt 22, the gap between the clamping head 6 and the clamping groove 4 is eliminated, realizing mechanical rigid fixing.

[0031] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A detachable chair leg, characterized by, The utility model provides a chair foot fixing device, including center seat (1), a plurality of installation parts (2) and a plurality of chair feet (3), the equidistant distribution of a plurality of installation parts (2) is evenly distributed on the circumferential outer wall of center seat (1), the bottom surface of each installation part (2) is equipped with the clamping groove (4) along the axial extension, the left and right two side walls of clamping groove (4) are equipped with the first limiting slot (5) symmetrically, the end of a plurality of chair feet (3) is equipped with the clamping joint (6) with the shape of clamping groove (4) is matched, the left and right two side walls of clamping joint (6) are equipped with the first limiting protrusion (7) with the first limiting slot (5) is matched, the second limiting slot (8) of the groove bottom is also equipped in clamping groove (4), the end of clamping joint (6) is equipped with the second limiting protrusion (9) with the second limiting slot (8) is matched, when chair foot (3) is installed with the inclination angle alpha, the second limiting protrusion (9) is embedded in the second limiting slot (8) and the first limiting protrusion (7) is aligned the first limiting slot (5) entrance, subsequently rotate chair foot (3) and make the first limiting protrusion (7) along the first limiting slot (5) slide to the locking position, at this moment, the side of second limiting protrusion (9) and the inner wall of second limiting slot (8) form the surface contact.

2. A detachable chair foot according to claim 1, characterized in that: The first limiting slot (5) is trapezoidal structure and the width of the first limiting slot (5) is tapered from outside to inside, forming a guiding structure with wide outside and narrow inside, and the abutting surface between the outer wall of the first limiting protrusion (7) and the inner wall of the first limiting slot (5) is a first arc surface (10).

3. The detachable chair leg of claim 1, wherein: The end of the second limiting protrusion (9) is a second arc surface (11), the first placing slot (12) is formed on the second arc surface (11), and the first placing block (13) is fixedly arranged in the second limiting slot (8).

4. The detachable chair leg of claim 1, wherein: Two third limiting protrusions (14) are fixedly arranged in each clamping groove (4), and two third limiting slots (15) are formed on each clamping joint (6), which are matched with the two third limiting protrusions (14) one by one.

5. A removable chair foot according to claim 4, wherein: The side of the third limiting protrusion (14) close to the second limiting slot (8) is a slope (16), the side of the third limiting slot (15) close to the second limiting protrusion (9) is a third arc surface (17), and the third arc surface (17) of the third limiting slot (15) is in abutment with the slope (16) of the third limiting protrusion (14).

6. A removable chair foot according to claim 4, wherein: A fourth limiting protrusion (18) is fixedly arranged between the two third limiting protrusions (14), the fourth limiting protrusion (18) is fixedly arranged on the inner wall of the clamping groove (4), a fourth limiting slot (19) is formed on the clamping joint (6), the fourth limiting slot (19) is in abutment with the fourth limiting protrusion (18), and the abutting surface between the fourth limiting slot (19) and the fourth limiting protrusion (18) is a fourth arc surface (20).

7. A removable chair foot according to claim 6, wherein: The clamping joint (6) is provided with a through hole (21), and a bolt (22) is arranged on the clamping joint (6) and slidably passes through the through hole (21) and is in threaded connection with the fourth limiting protrusion (18).

8. The detachable chair leg of claim 1, wherein: The central seat (1) is provided with a through hole (23) penetrating the upper and lower surfaces in the center, which is used for connecting a seat supporting part.

9. The detachable chair leg of claim 1, wherein: Each of the chair legs (3) is provided with a mounting hole (24) for mounting a caster at the end away from the central seat (1).

Images