A chair leg

Abstract

The present invention discloses a detachable foot for an office chair, comprising a foot base and a support leg, wherein the center of the foot base is provided with a socket, and the foot base is evenly provided with a plurality of connecting arms extending in all directions, and the number of the support legs corresponds to the connecting arms; a protrusion is provided at one end of the support leg, and a mounting hole for mounting and matching with the protrusion is provided on the end surface of the connecting arm away from the socket; the protrusion has a taper, and the mounting hole has an inner conical surface matching with the taper of the protrusion, and the protrusion is provided with an external thread, and the mounting hole has an internal thread of the same form; during installation, the support leg is twisted to make the external thread of the protrusion rotate and match with the internal thread of the mounting hole, and the protrusion enters the mounting hole and the protrusion is pressed and matched with the conical surface of the mounting hole. The detachable foot for an office chair of the present invention divides the foot into a foot base and a support leg, which can reduce the packaging volume of the seat when it is packed, saving transportation costs; and it is not easy to pinch your hands during the installation process, and the operation safety is good.

Description

Technical Field

[0001] The invention relates to the field of seating, and in particular to a detachable chair foot of an office chair. Background Art

[0002] The five-claw-shaped seat under the seat of the existing office chair is mostly an integrated structure, which is either large or bulky, and is extremely inconvenient to move during storage and transportation. It also occupies a large space, consumes a lot of storage and transportation resources, and increases storage and transportation costs. Recently, detachable office chair feet have also appeared on the market to reduce space occupancy and storage and transportation costs during storage and transportation. However, this structure requires the use of special installation tools to remove or install with screws, which requires users to waste a lot of time to install or remove, causing more trouble to users or movers. In addition, most of these detachable chair feet are plug-in structures, which are easy to pinch hands when users install them by themselves, and there are hidden safety risks.

[0003] The Chinese invention patent CN201020123493.5 discloses an "office chair foot", which includes a foot base and a plurality of protrusions on its outer edge, the end of the protrusion has a flush outer edge, and a concave hole is provided in the central part of the outer edge; a plurality of supporting feet corresponding to the protrusions, the head end of the supporting feet has a flush outer edge, and a convex part is provided in the central part of the outer edge; the convex part can be tightly inserted into the concave hole; it is characterized in that the side of the protrusion has a locking hole; the convex part has an elastic tongue; the elastic tongue can be inserted into the locking hole. The above-mentioned foot structure fixes the supporting feet through an elastic tongue or a marble limiter, so that it can be easily disassembled and separated by hand, and can also be quickly and firmly installed by hand. Therefore, the separate packaging can be quickly disassembled to reduce the occupied space during storage and transportation, and it can be quickly and conveniently installed and fixed when in use. Although the chair leg structure can quickly and conveniently install and fix the legs, it is easy to loosen after long-term use due to its plug-in structure; and during the installation process, it is easy for a person to accidentally get his hand caught between the chair leg base and the legs, causing hand injuries, and the safety factor is not high. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide a detachable leg of an office chair, which allows the user to disassemble and assemble the office chair foot by hand without any installation tools, so as to achieve disassembly and separation packaging for transportation during storage and transportation, thereby reducing the packaging volume, saving storage and transportation resources, and reducing storage and transportation costs. The legs are more tightly and firmly connected, and the installation process is safer.

[0005] The technical solution of the present invention is achieved in this way:

[0006] A detachable leg of an office chair comprises a leg base and a support leg, wherein the leg base has a socket at its center, and the leg base is evenly distributed with a plurality of connecting arms extending in all directions, and the number of the support legs corresponds to the number of the connecting arms; a protrusion is provided at one end of the support leg, and a mounting hole for mounting and matching with the protrusion is provided on the end surface of the connecting arm away from the socket; the protrusion has a taper, which is a Morse taper, and the mounting hole has an inner conical surface matching with the taper of the protrusion, and the protrusion is provided with an external thread, and the mounting hole has an internal thread of the same form; during installation, the support leg is twisted to make the external thread of the protrusion rotate and match with the internal thread of the mounting hole, the protrusion enters the mounting hole, and the protrusion is pressed and matched with the conical surface of the mounting hole.

[0007] The office chair of the present invention has detachable chair legs, which are divided into a chair leg base and a supporting leg, so that the packaging volume of the chair can be reduced when packing, and the transportation cost is saved; and the supporting leg and the chair leg base are rotatably connected by a thread, and the connection between the supporting leg and the chair leg base is matched by a taper, so that the supporting leg is easy and labor-saving when connecting, and the connection is tighter after installation, and it is not easy to pinch hands during the installation process, and the operation safety is good.

[0008] Preferably, the protrusion is a truncated cone protruding from the middle of the end surface of the support leg toward the connecting arm, and the diameter of the protrusion decreases from the end of the support leg toward the connecting arm.

[0009] Preferably, the external thread is arranged on the outer surface of the protrusion.

[0010] Preferably, the taper of the protrusion and the inner conical surface of the mounting hole is a Morse taper. The Morse taper makes the protrusion and the mounting hole have high stability and better tightness after being matched.

[0011] Preferably, an elastic buckle and a buckle hole are provided between the support leg and the connecting arm, and the elastic buckle and the buckle hole are engaged with each other to limit the protrusion from detaching from the connecting arm. The elastic buckle is arranged on one of the support leg or the connecting arm, and the buckle hole is arranged on the other of the connecting arm or the support leg.

[0012] Preferably, the elastic buckle is arranged on the end face of the support leg with the protrusion, and the buckle hole is correspondingly arranged on the end face of the connecting arm with the mounting hole. The elastic buckle effectively prevents the support leg from being reversed and dislodged after being connected to the chair leg base.

[0013] The design starting point, concept and beneficial effects of the present invention using the above technical solution are:

[0014] 1. Save transportation costs. The chair legs can be divided into detachable chair leg bases and supporting legs, so that they can be separated and packaged during storage and transportation to reduce packaging volume, making transportation convenient, efficient, and cost-effective.

[0015] 2. Easy to install and highly safe. Users do not need special tools to install it. They only need to rotate the support leg and the base of the chair leg. And through the rotating connection, there is no need for socketing, it is not easy to pinch your hands, and the installation is simple and safe.

[0016] 3. The support legs are firmly connected after installation. The protrusions and the mounting holes are matched through threads and tapers, so that the support legs are tightly and firmly connected after installation. There is also a snap-on device, so there is no need to worry about them falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a three-dimensional structure in which a support leg is connected to a base of a chair leg in an embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of a three-dimensional structure in which the base of the chair leg is not connected to the supporting leg in an embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the supporting foot in the embodiment of the present invention;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the base of the chair leg in an embodiment of the present invention.

[0021] The reference numerals of the figures are: chair leg base 1; support leg 2; insertion hole 3; connecting arm 4; protrusion 5; mounting hole 6; inner cone 7; external thread 8; internal thread 9; elastic buckle 10; spring sheet 10a; clamp head 10b; buckle hole 11. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0024] In the description of the present invention, the term "at least one" refers to one or more than one, unless otherwise clearly defined. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] The specific implementation of the present invention is as follows:

[0026] like Figure 1-4As shown, the present invention provides a detachable chair leg of an office chair, comprising a chair leg base 1 and a support leg 2, wherein the support leg 2 is detachably connected to the chair leg base 1.

[0027] like Figure 1 , 2 As shown, a socket 3 is provided at the middle position of the chair leg base 1, and the socket 3 is used to connect the gas rod installed on the seat. Five connecting arms 4 extending in all directions are evenly distributed on the chair leg base 1, and the connecting arms 4 are evenly surrounded by the socket 3. Each connecting arm 4 is correspondingly connected to a leg 2, and the leg 2 and the connecting arm 4 are in a rotationally connected fixed relationship. The specific connection method is:

[0028] like Figure 3 , 4 As shown, a protruding portion 5 protruding outward is provided at the middle position of the end surface of the connecting end of the support leg 2 and the connecting arm 4. The protruding portion 5 is a truncated cone and has a taper, which is a Morse taper. The diameter of the protruding portion 5 gradually decreases from the chair leg end toward the connecting arm 4; a mounting hole 6 corresponding to the end surface of the connecting arm 4 away from the insertion hole 3 is provided, which is installed and matched with the protruding portion 5, and the mounting hole 6 has an inner conical surface 7 matched with the taper of the protruding portion 5; and the taper of the protruding portion 4 and the taper of the inner conical surface 7 of the mounting hole are Morse tapers, so that the protruding portion 4 and the mounting hole 6 are more tightly and stably combined, and the connection gap is effectively eliminated; a circle of external threads 8 is also provided on the outer surface of the protruding portion 5, and a circle of internal threads 9 of the same form is correspondingly provided in the mounting hole 6, so that the protruding portion 5 and the mounting hole 6 are connected by thread rotation.

[0029] An elastic clip 10 is provided below the end surface of the support leg 2 with the protrusion 5, and the elastic clip 10 includes an elastic sheet 10a and a clamping head 10b. The elastic sheet 10a is arranged on the end surface of the connecting end of the support leg 2 and the connecting arm 4, and the clamping head 10b protrudes outward from the end surface of the support leg; a clamping hole 11 is correspondingly provided on the end surface of the connecting arm with the mounting hole 6, and the elastic clip 10 is clamped and matched with the clamping hole 11.

[0030] When the chair seat is packed and transported, the chair leg base 1 and the support leg 2 can be packed and transported separately to reduce the packaging volume and save transportation costs; when the user installs it by himself, he only needs to control the support leg 2 to align the protrusion 5 with the mounting hole 6, and then twist the support leg 2 to make the external thread 8 of the protrusion 5 rotate and match with the internal thread 9 of the mounting hole 6. After the support leg 2 rotates one circle, the buckle 10b of the elastic buckle 10 is snapped into the buckle hole 22 and the installation is completed. At this time, the conical surface between the protrusion 5 and the mounting hole 6 is pressed and matched, and the support leg 2 is firmly fixed in the mounting hole, the connection is tight, and it is not easy to fall off. It takes a lot of force to remove it when disassembling; while the detachable chair leg meets the requirements of detachability, its installation method is simple in structure and easy to operate. The use of thread and taper makes the support leg 2 more secure after installation, and solves the problem of easy pinching of hands in the sleeve-type detachable chair leg, and has better safety.

Claims

1. A chair leg, characterized in that: It includes a chair leg base and a support leg, the center position of the chair leg base is provided with a socket, and the chair leg base is evenly distributed with a plurality of connecting arms extending in all directions, and the number of the support legs corresponds to the connecting arms; a protrusion is provided at one end of the support leg, and a mounting hole for mounting and matching with the protrusion is provided on the end surface of the connecting arm away from the socket; the protrusion has a taper, and the taper is a Morse taper; the mounting hole has an inner conical surface matching with the taper of the protrusion, the protrusion is provided with an external thread, and the mounting hole has an internal thread of the same form; during installation, the support leg is twisted to make the external thread of the protrusion rotate and match with the internal thread of the mounting hole, the protrusion enters the mounting hole and the protrusion is pressed and matched with the conical surface of the mounting hole; the protrusion is a truncated cone protruding toward the connecting arm from the middle position of the end surface of the support leg, and the diameter of the protrusion decreases from the end close to the support leg toward the connecting arm.

2. The chair leg according to claim 1, characterized in that: The external thread is arranged on the outer surface of the protruding part.

3. The chair leg according to claim 1, characterized in that: An elastic buckle and a buckle hole are provided between the support leg and the connecting arm. The elastic buckle and the buckle hole are engaged with each other to limit the protrusion from detaching from the connecting arm. The elastic buckle is arranged on one of the support leg or the connecting arm, and the buckle hole is arranged on the other of the connecting arm or the support leg.

4. The chair leg according to claim 3, characterized in that: The elastic buckle is arranged on the end surface of the support leg with the protrusion, and the buckle hole is correspondingly arranged on the end surface of the connecting arm with the mounting hole.

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