A chair leg

Abstract

The present invention relates to a chair leg, belonging to the technical field of swivel chair accessories. It includes a base, a gas spring mounting seat arranged on the base, and a plurality of supporting feet connected to the base, and a caster mounting seat is arranged at one end of the supporting foot away from the base; the base, gas spring mounting seat, supporting foot and caster mounting seat are all composed of an upper shell and a lower shell; the base, gas spring mounting seat, supporting foot and caster mounting seat of the upper shell are integrally connected; the base, gas spring mounting seat, supporting foot and caster mounting seat of the lower shell are integrally connected; the caster mounting seat of the lower shell is provided with a mounting hole for mounting the caster; the upper shell and the lower shell are fixedly connected; the upper shell is metal; the lower shell is plastic. From the visual effect point of view, the present invention is made of metal and has a beautiful appearance; from the local mechanical properties of the product, the caster mounting seat of the upper shell made of metal can provide a counter stress to the caster mounting seat of the lower shell made of plastic to offset the load.

Description

Technical Field

[0001] The invention relates to a chair foot and belongs to the technical field of swivel chair accessories. Background Art

[0002] In order to facilitate the transportation of chairs, chairs are usually designed to be detachable. This significantly improves the efficiency of storage and transportation. However, the prior art usually makes the five-star foot of the chair into an integral body, which can be quickly disassembled relative to the base of the chair. However, this integral body still occupies a large space during storage and transportation, so the prior art further proposes a detachable chair foot. For example, the Chinese invention patent with the authorization announcement number CN 103735069 B discloses a detachable chair foot. It includes a foot base, a foot arm and a fastener; the foot base is provided with a central hole for installing the fastener, the foot base is provided with a plurality of jacks for installing the foot arm along the circumference of the central hole, the fastener is provided with a fixing pin for connecting the foot arm and the foot base, the fastener is provided with a connection port for installing the seat support, and one end of the fastener located in the foot base is provided with a plurality of baffles distributed in a circumferential array. By implementing the above technical solution, the five-star chair foot can be made detachable, and the assembled five-star chair foot also has the advantage of good structural strength.

[0003] It is foreseeable that the above solution provides a way of thinking, but this idea is obviously not the only one.

[0004] The first point worth explaining is that the above scheme has a more obvious disadvantage, which was not prominent at the time. As people's aesthetic awareness improves, chairs with exquisite appearance are more popular in the market. Exquisite appearance is a relatively abstract concept, but one thing that cannot be denied is that if the degree of integration of the chair legs is high, it is easier to be considered as exquisite in appearance. Take the above patent as an example. After the chair legs in the above scheme are assembled, it can still be clearly seen that there is an assembly gap between the foot seat, the foot arm and the fastener, and from a visual point of view, the fastener protrudes from the foot seat, which obviously has a negative impact on the appearance of the chair legs.

[0005] The second point worth mentioning is that consumers tend to buy chair legs with a metal texture, such as stainless steel or aluminum alloy. Metal chair legs not only have a better appearance, but also have higher connection strength. However, one problem that cannot be ignored is that metal chair legs have a larger mass, which is not conducive to transportation. In addition, metal chair legs will produce a "squeaking" sound when used, which is annoying. Summary of the invention

[0006] The present invention aims to solve the above-mentioned problems, thereby providing a chair leg which has a beautiful appearance, high structural strength and does not produce a "squeaking" sound when in use.

[0007] The technical solution of the present invention to solve the above problems is as follows:

[0008] A chair leg, comprising a base, a gas spring mounting seat arranged in the middle of the base, and a plurality of supporting feet connected to the base, wherein a wheel caster mounting seat is arranged at one end of the supporting foot away from the base; the base, the gas spring mounting seat, the supporting feet and the wheel caster mounting seat are all composed of an upper shell and a lower shell; the upper shell and the lower shell are fixedly connected;

[0009] The base, gas spring mounting seat, support foot and caster mounting seat of the upper shell are integrally connected;

[0010] The base, gas spring mounting seat, support foot and caster mounting seat of the lower shell are integrally connected;

[0011] The caster mounting seat of the lower shell part is provided with mounting holes for mounting the casters;

[0012] The upper shell is made of metal;

[0013] The lower shell part is made of plastic.

[0014] Preferably, the upper shell portion and the lower shell portion are snap-connected.

[0015] Preferably, the upper shell portion at least partially covers the lower shell portion.

[0016] Preferably, the caster mounting seat of the lower shell part is in the shape of a hollow tube and is integrally connected to the supporting foot of the lower shell part through its bottom; the caster mounting seat of the upper shell part is in the shape of a sleeve and is integrally connected to the supporting foot of the upper shell part through its upper part; the caster mounting seat of the upper shell part is sleeve-shaped and is integrally connected to the supporting foot of the upper shell part through its upper part; the caster mounting seat of the upper shell part is sleeved onto and covers the caster mounting seat of the lower shell part.

[0017] Preferably, the base of the upper shell portion covers the base of the lower shell portion.

[0018] Preferably, the gas spring mounting seat of the upper shell portion is partially inserted into the gas spring mounting seat of the lower shell portion.

[0019] Preferably, the support legs of the upper shell portion cover the support legs of the lower shell portion.

[0020] Preferably, the upper shell and the lower shell are snap-fitted together by a clamping strip and a clamping slot; the clamping strip is arranged on the upper shell, and the clamping slot is arranged on the lower shell; or the clamping strip is arranged on the lower shell, and the clamping slot is arranged on the upper shell.

[0021] Preferably, it also includes an elastic clip for improving the snap-fit ​​strength between the card strip and the card slot, and the inner side surface of the elastic clip is elastically pressed and connected to the card strip, and the outer side surface of the elastic clip is elastically pressed and connected to the card slot.

[0022] Preferably, the elastic clip is made of metal material, and comprises a clip body, an inward elastic sheet and an outward elastic sheet arranged on the clip body; the inward elastic sheet is arranged obliquely upward, and the outward elastic sheet is arranged obliquely downward.

[0023] In the above technical solution of the present invention, the positional relationship between the upper and lower parts is set based on the card strip. Because during assembly, the elastic clip is pre-installed on the card strip, and the card strip is usually set on the upper shell of the metal material; therefore, when the chair legs are correctly placed, the card strip is set downward, and the inward elastic sheet needs to be clamped on the card strip from the bottom to the top. In this state, the inward elastic sheet is set obliquely upward, and the outward elastic sheet is set obliquely downward. If the card strip is set on the lower shell of the plastic material, then the elastic clip needs to be installed in the opposite direction. At this time, the inward elastic sheet is set obliquely downward, and the outward elastic sheet is set obliquely upward. In fact, the elastic clip structure in the above two cases has not changed, and the relationship between the upper and lower parts is only described based on the installation direction of the elastic clip itself.

[0024] Preferably, the inward elastic sheet includes a first inward elastic sheet arranged at one end of the clip body, a second inward elastic sheet arranged at the other end of the clip body, and a third inward elastic sheet arranged in the middle of the clip body; the outward elastic sheet includes a first outward elastic sheet arranged at one end of the clip body, and a second outward elastic sheet arranged at the other end of the clip body.

[0025] Preferably, the first inward elastic piece and the second inward elastic piece have an inclination angle of 45° to 75° relative to the clip body; and the third inward elastic piece has an inclination angle of 10° to 30° relative to the clip body.

[0026] Preferably, it further comprises a gas spring protective cover, the top of the gas spring protective cover is snap-fitted with the bottom of the gas spring mounting seat.

[0027] In summary, the present invention has the following beneficial effects:

[0028] The chair legs of the present invention are designed to be an upper shell portion made of metal and a lower shell portion made of plastic, and the upper shell portion and the lower shell portion are matched and connected. From a visual point of view, the present invention is made of metal and has a beautiful appearance. From an overall structural point of view, the composite structure of metal and plastic of the present invention effectively reduces the weight of the chair legs compared with pure metal materials. From a mechanical property point of view, after the present invention is correctly installed, the weight of the chair is mainly directly borne by the metal material part, but at the same time, due to the material composite relationship, the lower shell portion can also indirectly share the weight of the chair. From a use effect point of view, since the caster part of the chair is installed in a caster mounting seat in the shape of a hollow tube located at the lower shell portion, therefore, when the chair is in use, the caster will not come into direct contact with the metal part, thereby avoiding the generation of annoying "creaking" "Sound; From the perspective of the local mechanical properties of the product, although the caster mounting seat of the lower shell is in direct contact with the caster part, the mechanical properties of plastic are generally lower than those of metal materials. However, since the upper shell of the present invention is coated on the lower shell, especially the caster mounting seat part, the caster mounting seat of the upper shell is sleeved on the caster mounting seat of the lower shell and covers it. Therefore, in terms of mechanical properties, when the caster mounting seat of the lower shell of the plastic material is subjected to loads in multiple directions, especially the extrusion stress towards the surroundings naturally generated after the caster mounting shaft is installed and the compressive stress in multiple directions generated by the load of the chair, if there is no upper shell coating, the plastic part is easy to burst; the caster mounting seat of the upper shell of the metal material can provide the caster mounting seat of the lower shell of the plastic material with a counter stress to offset the load. In addition, since the metal material is coated on the outside, when the chair is hit during use, the caster mounting seat is most susceptible to impact. In the present invention, since this part is coated on the outside with metal material, it can have a good protective effect on the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0030] Figure 2 It is an exploded schematic diagram of the present invention;

[0031] Figure 3 It is a schematic structural diagram of the upper housing of the present invention;

[0032] Figure 4 It is a structural schematic diagram of the lower housing of the present invention;

[0033] Figure 5 It is a left side view of the elastic clip of the present invention;

[0034] Figure 6 It is a right side view of the elastic clip of the present invention;

[0035] In the figure, 1-base, 2-gas spring mounting seat, 3-support foot, 4-wheel caster mounting seat, 5-elastic clip, 6-gas spring protective cover, 7-clip strip, 8-clip slot;

[0036] 100-upper shell, 200-lower shell;

[0037] 1a-base of the upper shell, 2a-gas spring mounting seat of the upper shell, 3a-supporting foot of the upper shell, 4a-caster mounting seat of the upper shell;

[0038] 1b-base of the lower shell, 2b-gas spring mounting seat of the lower shell, 3b-supporting foot of the lower shell, 4b-castor mounting seat of the lower shell;

[0039] 51-clip body, 52a-first inward elastic piece, 52b-second inward elastic piece, 52c-third inward elastic piece, 53a-first outward elastic piece, 53b-second outward elastic piece. DETAILED DESCRIPTION

[0040] The present invention is further explained below in conjunction with the accompanying drawings.

[0041] This specific implementation is only an explanation of the present invention, not a limitation of the present invention. Any changes made by those skilled in the art after reading the specification of the present invention will be protected by the patent law as long as they are within the scope of the claims.

[0042] like Figure 1 As shown, a chair leg comprises a base 1, a gas spring mounting seat 2 arranged in the middle of the base, and a plurality of supporting feet 3 connected to the base, wherein a caster mounting seat 4 is arranged at one end of the supporting feet 3 away from the base 1.

[0043] Combination Figure 2~Figure 4 As shown, the base 1, the gas spring mounting seat 2, the support foot 3 and the caster mounting seat 4 are all composed of an upper shell 100 and a lower shell 200; the upper shell 100 and the lower shell 200 are fixedly connected;

[0044] like Figure 2 As shown, the base 1a, gas spring mounting seat 2a, support foot 3a and caster mounting seat 4a of the upper shell 100 are integrally connected; the base 1b, gas spring mounting seat 2b, support foot 3b and caster mounting seat 4b of the lower shell 200 are integrally connected; the caster mounting seat 4b of the lower shell is provided with a mounting hole for mounting the caster;

[0045] In this embodiment, the upper shell 100 is made of metal; and the lower shell 200 is made of plastic.

[0046] Combination Figure 2~Figure 4As shown, the upper shell portion 100 and the lower shell portion 200 are snap-connected.

[0047] Figure 4 As shown, the caster mounting seat 4b of the lower shell portion 200 is hollow tubular and is integrally connected to the supporting foot 3b of the lower shell portion 200 through its bottom. Figure 3 As shown, the caster mounting seat 4a of the upper shell 100 is sleeve-shaped and is integrally connected to the supporting foot 3a of the upper shell through its upper portion. Figure 1 and Figure 2 It can be seen that the caster mounting seat 4a of the upper shell part is sleeved on and covers the caster mounting seat 4b of the lower shell part.

[0048] and, Figure 1 and Figure 2 It is also shown that the base 1a of the upper shell 100 covers the base 1b of the lower shell 200. The gas spring mounting seat 2 of the upper shell 100 is partially inserted into the gas spring mounting seat 2 of the lower shell 200. The support foot 3a of the upper shell covers the support foot 3b of the lower shell 200.

[0049] For example Figure 3 and Figure 4 As shown, the upper shell 100 and the lower shell 200 are engaged with each other through the clamping strip 7 and the clamping slot 8. In this embodiment, the clamping strip 7 is arranged on the upper shell 100, and the clamping slot 8 is arranged on the lower shell 200; however, it is foreseeable that the clamping strip 7 is arranged on the lower shell 200, and the clamping slot 8 is arranged on the upper shell 100.

[0050] In this embodiment, an elastic clip 5 is further included to improve the strength of the engagement between the clip strip 3 and the clip slot 4. Figure 5 and 6 As shown, the inner side of the elastic clip 5 is elastically pressed and connected with the clip strip 3, and the outer side of the elastic clip 5 is elastically pressed and connected with the clip slot 4. The elastic clip 5 is made of metal material, including a clip body 51, an inward elastic sheet and an outward elastic sheet arranged on the clip body; the inward elastic sheet is arranged obliquely upward, and the outward elastic sheet is arranged obliquely downward. The inward elastic sheet includes a first inward elastic sheet 52a arranged at one end of the clip body, a second inward elastic sheet 52b arranged at the other end of the clip body, and a third inward elastic sheet 52c arranged in the middle of the clip body; the outward elastic sheet includes a first outward elastic sheet 53a arranged at one end of the clip body and a second outward elastic sheet 53b arranged at the other end of the clip body. In this embodiment, the first inward elastic sheet 52a and the second inward elastic sheet (52b) are inclined at an angle of 60° relative to the clip body; the third inward elastic sheet 52c is inclined at an angle of 15° relative to the clip body.

[0051] like Figure 1 As shown, the chair leg of this embodiment further includes a gas spring protection cover 6 , the top of the gas spring protection cover 6 is snap-fitted to the bottom of the gas spring mounting seat 2 .

Claims

1. A chair leg, comprising a base (1), a gas spring mounting seat (2) arranged in the middle of the base, and a plurality of supporting legs (3) connected to the base, wherein a wheel caster mounting seat (4) is arranged at one end of the supporting legs (3) away from the base (1); Features: The base (1), the gas spring mounting seat (2), the supporting foot (3) and the caster mounting seat (4) are all composed of an upper shell portion (100) and a lower shell portion (200); The base (1a), the gas spring mounting seat (2a), the supporting foot (3a) and the caster mounting seat (4a) of the upper shell portion (100) are integrally connected; The base (1b), the gas spring mounting seat (2b), the supporting foot (3b) and the caster mounting seat (4b) of the lower shell portion (200) are integrally connected; The caster mounting seat (4b) of the lower shell portion is provided with mounting holes for mounting the casters; The caster mounting seat (4b) of the lower shell portion (200) is in a hollow tubular shape and is integrally connected to the support foot (3b) of the lower shell portion through its bottom; The caster mounting seat (4a) of the upper shell portion (100) is sleeve-shaped and is integrally connected to the supporting foot (3a) of the upper shell portion through its upper portion; The caster mounting seat (4a) of the upper shell portion is sleeved onto and covers the caster mounting seat (4b) of the lower shell portion; The upper shell part (100) and the lower shell part (200) are clamped together; The base (1a) of the upper shell portion (100) covers the base (1b) of the lower shell portion (200); The gas spring mounting seat (2a) of the upper shell portion (100) is partially inserted into the gas spring mounting seat (2b) of the lower shell portion (200); The upper shell part (100) is made of metal; The lower shell part (200) is made of plastic.

2. A chair leg according to claim 1, characterized in that: The supporting feet (3a) of the upper shell part (100) cover the supporting feet (3b) of the lower shell part (200).

3. The chair leg according to claim 1, characterized in that: The upper shell part (100) and the lower shell part (200) are engaged with each other via a clamping strip (7) and a clamping slot (8); the clamping strip (7) is arranged on the upper shell part (100), and the clamping slot (8) is arranged on the lower shell part (200); or the clamping strip (7) is arranged on the lower shell part (200), and the clamping slot (8) is arranged on the upper shell part (100).

4. A chair leg according to claim 3, characterized in that: It also comprises an elastic clip (5) for improving the strength of the clipping fit between the clip strip (7) and the clip slot (8), wherein the inner side surface of the elastic clip (5) is elastically pressed and connected to the clip strip (7), and the outer side surface of the elastic clip (5) is elastically pressed and connected to the clip slot (8).

5. A chair leg according to claim 4, characterized in that: The elastic clip (5) is made of metal material, and comprises a clip body (51), an inward elastic sheet and an outward elastic sheet arranged on the clip body; the inward elastic sheet is arranged obliquely upward, and the outward elastic sheet is arranged obliquely downward.

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