CN111493571A

CN111493571A - Chair leg

Info

Publication number: CN111493571A
Application number: CN202010467158.5A
Authority: CN
Inventors: 孟振林; 潘文原; 杨堃; 谢秋平
Original assignee: Dke Office System Co ltd
Current assignee: Dke Office System Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2020-08-07

Abstract

The invention relates to a chair leg, and belongs to the technical field of swivel chair accessories. The device comprises a base, an air spring mounting seat arranged on the base and a plurality of supporting legs connected to the base, wherein one ends of the supporting legs, far away from the base, are provided with caster mounting seats; the base, the gas spring mounting seat, the supporting legs and the caster mounting seat are all formed by combining an upper shell part and a lower shell part; the base of the upper shell part, the gas spring mounting seat, the supporting legs and the caster mounting seat are integrally connected; the base of the lower shell part, the gas spring mounting seat, the supporting legs and the caster mounting seat are integrally connected; the caster mounting seat of the lower shell part is provided with a mounting hole for mounting a caster; the upper shell part and the lower shell part are fixedly connected; the upper shell part is made of metal; the lower shell part is made of plastic. In visual effect, the invention is made of metal material and has exquisite appearance; from the local mechanical property of the product, the caster mounting seat of the upper shell made of the metal material can provide the caster mounting seat of the lower shell made of the plastic material with the counter stress for offsetting the load.

Description

Chair leg

Technical Field

The invention relates to a chair leg, and belongs to the technical field of swivel chair accessories.

Background

To facilitate transportation of the chair, the chair is typically designed to be removable. This significantly improves the efficiency of storage and transport. In the prior art, the five-star foot of the chair is usually manufactured into a whole which can be quickly assembled and disassembled relative to the base body of the chair. This whole still occupies a large space during storage and transport, so the prior art further proposes a detachable chair foot. For example, the patent of the invention in China with the publication number of CN 103735069B discloses a detachable chair leg. It comprises a foot seat, a foot arm and a fastener; the foot stool is equipped with the centre bore that is used for installing the fastener, and the foot stool is equipped with the jack that a plurality of is used for installing the foot arm along centre bore circumference array, and the fastener is equipped with the fixed pin that is used for connecting foot arm and foot stool, is equipped with the connector that is used for installing seat support piece in the fastener, and the one end that the fastener is located the foot stool is equipped with the separation blade that a plurality of circumference array distributes. By implementing the technical scheme, the five-star chair leg can be made into a detachable structure, and the assembled five-star chair leg also has the advantage of good structural strength.

It is foreseen that the above described solution provides a concept, which is clearly not exclusive.

The first point worth mentioning is that the above solution has a rather significant drawback, which is not highlighted at the time. With the increase of aesthetic consciousness of people, chairs with exquisite appearance are more popular in the market. The aesthetic appearance is a relatively abstract concept, but it is undeniable that the more easily the chair leg is considered to be aesthetically pleasing if the degree of integration is high. Taking the above patent as an example, since the assembly gap between the foot seat, the foot arm and the fastener can be still clearly seen after the chair foot in the above scheme is assembled, and the fastener is obviously protruded on the foot seat from the visual effect, which has a negative effect on the appearance of the chair foot.

The second point is that consumers prefer to buy chair legs with metal texture, such as stainless steel or aluminum alloy. The chair leg made of metal has better appearance and higher connection strength. However, a not negligible problem is that the metal chair legs have a greater mass, which is not conducive to transportation. In addition, the chair legs made of metal can generate 'crunching' sound and cause trouble when in use.

Disclosure of Invention

The present invention is to solve the above problems, and thus to provide a chair leg which has a fine appearance, a high structural strength, and no "squeak" noise when used.

The technical scheme for solving the problems is as follows:

a chair leg comprises a base, an air spring mounting seat arranged in the middle of the base and a plurality of supporting legs connected to the base, wherein a caster mounting seat is arranged at one end of each supporting leg, which is far away from the base; the base, the gas spring mounting seat, the supporting legs and the caster mounting seat are all formed by combining an upper shell part and a lower shell part; the upper shell part and the lower shell part are fixedly connected;

the base of the upper shell part, the gas spring mounting seat, the supporting legs and the caster mounting seat are integrally connected;

the base of the lower shell part, the gas spring mounting seat, the supporting legs and the caster mounting seat are integrally connected;

the caster mounting seat of the lower shell part is provided with a mounting hole for mounting a caster;

the upper shell part is made of metal;

the lower shell part is made of plastic.

Preferably, the upper shell part and the lower shell part are clamped.

Preferably, the upper shell portion at least partially encloses the lower shell portion.

Preferably, the caster mounting seat of the lower shell part is in a hollow tubular shape and is integrally connected with the supporting leg of the lower shell part through the bottom of the caster mounting seat; the caster mounting seat of the upper shell part is sleeve-shaped and is integrally connected with the supporting legs of the upper shell part through the upper part of the caster mounting seat; the caster mounting seat of the upper shell part is sleeved on the caster mounting seat of the lower shell part and covers the caster mounting seat.

Preferably, the base of the upper housing portion covers the base of the lower housing portion.

Preferably, the gas spring mounting seat of the upper housing portion is partially inserted into the gas spring mounting seat of the lower housing portion.

Preferably, the support legs of the upper case portion cover the support legs of the lower case portion.

Preferably, the upper shell part and the lower shell part are matched in a clamping manner through clamping strips and clamping grooves; the clamping strip is arranged on the upper shell part, and the clamping groove is arranged on the lower shell part; or the clamping strip is arranged on the lower shell part, and the clamping groove is arranged on the upper shell part.

Preferably, the clamping device further comprises an elastic clamp used for improving the clamping matching strength between the clamping strip and the clamping groove, the inner side face of the elastic clamp is elastically connected with the clamping strip in a pressing mode, and the outer side face of the elastic clamp is elastically connected with the clamping groove in a pressing mode.

Preferably, the elastic clip is made of a metal material and comprises a clip body, and an inward elastic sheet and an outward elastic sheet which are arranged on the clip body; the inward elastic pieces are obliquely arranged upwards, and the outward elastic pieces are obliquely arranged downwards.

In the above technical solution of the present invention, the upper and lower positional relationships are set based on the card strip. When assembling, the elastic clip is clamped on the clamping strip in advance, and the clamping strip is usually arranged on the upper shell part made of metal; therefore, when the chair legs are correctly placed, the clamping strips are arranged downwards, the inward elastic pieces are clamped on the clamping strips from the lower parts upwards due to the fact that the inward elastic pieces are required to be clamped on the clamping strips, and in the state, the inward elastic pieces are arranged upwards in an inclined mode, and the outward elastic pieces are arranged downwards in an inclined mode. If the clamping strip is arranged on the lower shell made of plastic materials, the elastic clamp needs to be installed in a reversing mode, the inward elastic piece is arranged obliquely downwards, and the outward elastic piece is arranged obliquely upwards. In fact, the structure of the spring clip in the above two cases is not changed, and the upper and lower relationships are described only based on the mounting direction of the spring clip itself.

Preferably, the inward elastic pieces comprise a first inward elastic piece arranged at one end of the clip body, a second inward elastic piece arranged at the other end of the clip body and a third inward elastic piece arranged in the middle of the clip body; the outward elastic piece comprises a first outward elastic piece arranged at one end of the clip body and a second outward elastic piece arranged at the other end of the clip body.

Preferably, the inclination angle of the first inward elastic sheet and the second inward elastic sheet relative to the clip body is 45-75 degrees; the inclination angle of the third inward elastic sheet relative to the clip body is 10-30 degrees.

Preferably, the gas spring installation seat further comprises a gas spring protection sleeve, and the top of the gas spring protection sleeve is clamped with the bottom of the gas spring installation seat.

In conclusion, the invention has the following beneficial effects:

the chair leg is designed into the upper shell part made of metal and the lower shell part made of plastic materials, and the upper shell part and the lower shell part are connected in a matched mode; in terms of the overall structure, the composite structure of metal and plastic effectively reduces the weight of the chair leg compared with the pure metal material; from the aspect of mechanical property, after the chair is correctly installed, the weight of the chair is mainly borne by the metal material part directly, but simultaneously, the lower shell part can indirectly bear the weight of the chair due to the material compounding relationship; from the aspect of use effect, the caster part of the chair is arranged in the caster mounting seat which is positioned in the lower shell part and is in a hollow tubular shape, so that the caster can not be in direct contact with the metal part when the chair is used, and the generation of fussy sound can be avoided; from the local mechanical characteristics of the product, although the caster mounting seat of the lower shell is directly contacted with the caster part, the mechanical property of the plastic is generally lower than that of the metal material, because the upper shell of the invention is coated on the lower shell, in particular to the caster mounting seat part, and the caster mounting seat of the upper shell is sleeved on and coated on the caster mounting seat of the lower shell, on the mechanical property, when the caster mounting seat of the lower shell made of the plastic material is loaded in multiple directions, in particular to the naturally generated extrusion stress towards the periphery after the installation of the caster mounting shaft and the multi-direction extrusion stress generated by the load of the chair, the plastic part is easy to burst if the upper shell is not coated; the caster mount of the upper housing made of metal can provide a counter stress that counteracts the load to the caster mount of the lower housing made of plastic. In addition, because the metal material is coated outside, when the chair is impacted in use, particularly the part of the caster mounting seat is most easily impacted, and in the invention, the part is coated outside by the metal material, so that the whole structure can be well protected.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an exploded schematic view of the present invention;

FIG. 3 is a schematic structural view of the upper housing of the present invention;

FIG. 4 is a schematic structural view of the lower housing of the present invention;

FIG. 5 is a left side elevational view of the spring clip of the present invention;

FIG. 6 is a right side view of the spring clip of the present invention;

in the figure, 1-a base, 2-a gas spring mounting seat, 3-a supporting leg, 4-a caster mounting seat, 5-an elastic clamp, 6-a gas spring protective sleeve, 7-a clamping strip and 8-a clamping groove;

100-an upper shell part and 200-a lower shell part;

1 a-a base of the upper shell part, 2 a-a gas spring mounting seat of the upper shell part, 3 a-supporting legs of the upper shell part, and 4 a-a caster mounting seat of the upper shell part;

1 b-a base of the lower shell part, 2 b-a gas spring mounting seat of the lower shell part, 3 b-supporting legs of the lower shell part, and 4 b-a caster mounting seat of the lower shell part;

51-clip body, 52 a-first inward elastic sheet, 52 b-second inward elastic sheet, 52 c-third inward elastic sheet, 53 a-first outward elastic sheet, 53 b-second outward elastic sheet.

Detailed Description

The invention is further explained below with reference to the drawings.

This detailed description is to be construed as illustrative only and is not limiting, since modifications will occur to those skilled in the art upon reading the preceding specification, and it is intended to be protected by the following claims.

As shown in fig. 1, a chair leg comprises a base 1, an air spring mounting seat 2 arranged in the middle of the base, and a plurality of supporting legs 3 connected to the base, wherein a caster mounting seat 4 is arranged at one end of each supporting leg 3 far away from the base 1.

Referring to fig. 2 to 4, the base 1, the gas spring mounting seat 2, the supporting legs 3 and the caster mounting seat 4 are formed by combining an upper shell 100 and a lower shell 200; the upper shell part 100 and the lower shell part 200 are fixedly connected;

as shown in fig. 2, the base 1a, the gas spring mounting seat 2a, the supporting legs 3a and the caster mounting seat 4a of the upper housing part 100 are integrally connected; the base 1b, the gas spring mounting seat 2b, the supporting legs 3b and the caster mounting seat 4b of the lower shell 200 are integrally connected; the caster mounting seat 4b of the lower shell part is provided with a mounting hole for mounting a caster;

in this embodiment, the upper shell 100 is made of metal; the lower shell portion 200 is made of plastic.

As shown in fig. 2 to 4, the upper housing part 100 and the lower housing part 200 are clamped together.

Fig. 4 shows that the caster-mounting seat 4b of the lower case 200 is hollow and tubular and is integrally connected with the supporting legs 3b of the lower case 200 through the bottom thereof. Fig. 3 shows that the caster mount 4a of the upper case 100 is sleeve-shaped and is integrally connected with the support legs 3a of the upper case through an upper portion thereof. Referring again to fig. 1 and 2, it can be seen that caster mounts 4a of the upper housing portion fit over and wrap caster mounts 4b of the lower housing portion.

Also, fig. 1 and 2 show that the base 1a of the upper case 100 covers the base 1b of the lower case 200. Gas spring mounts 2 of upper housing portion 100 are partially inserted within gas spring mounts 2 of lower housing portion 200. The supporting legs 3a of the upper case portion cover the supporting legs 3b of the lower case portion 200.

As further shown in fig. 3 and 4, the upper housing part 100 and the lower housing part 200 are snap-fitted with each other via the snap strips 7 and the snap grooves 8. In this embodiment, the card strip 7 is disposed on the upper housing portion 100, and the card slot 8 is disposed on the lower housing portion 200; it is contemplated that card strip 7 may be disposed in lower housing portion 200 and card slot 8 may be disposed in upper housing portion 100.

In this embodiment, the clip further comprises an elastic clip 5 for improving the clamping fit strength between the clamping strip 3 and the clamping groove 4. The elastic clip 5 is shown in fig. 5 and 6, the inner side surface of the elastic clip 5 is elastically connected with the clamping strip 3 in a pressing manner, and the outer side surface of the elastic clip 5 is elastically connected with the clamping groove 4 in a pressing manner. The elastic clip 5 is made of metal material and comprises a clip body 51, an inward elastic sheet and an outward elastic sheet which are arranged on the clip body; the inward elastic pieces are obliquely arranged upwards, and the outward elastic pieces are obliquely arranged downwards. The inward elastic pieces comprise a first inward elastic piece 52a arranged at one end of the clip body, a second inward elastic piece 52b arranged at the other end of the clip body and a third inward elastic piece 52c arranged in the middle of the clip body; the outward elastic piece includes a first outward elastic piece 53a disposed at one end of the clip body and a second outward elastic piece 53b disposed at the other end of the clip body. In the embodiment, the inclination angle of the first inward elastic piece 52a and the second inward elastic piece (52 b) relative to the clip body is 60 degrees; the third inward resilient piece 52c is inclined at an angle of 15 ° with respect to the clip body.

As shown in fig. 1, the chair leg of this embodiment further includes a gas spring protection sleeve 6, and the top of the gas spring protection sleeve 6 is clamped with the bottom of the gas spring installation seat 2.

Claims

1. A chair leg comprises a base (1), an air spring mounting seat (2) arranged in the middle of the base and a plurality of supporting legs (3) connected to the base, wherein a caster mounting seat (4) is arranged at one end, far away from the base (1), of each supporting leg (3); the method is characterized in that:

the base (1), the gas spring mounting seat (2), the supporting legs (3) and the caster mounting seat (4) are formed by combining an upper shell part (100) and a lower shell part (200); the upper shell part (100) and the lower shell part (200) are fixedly connected;

the base (1 a), the gas spring mounting seat (2 a), the supporting legs (3 a) and the caster mounting seat (4 a) of the upper shell (100) are integrally connected;

the base (1 b) of the lower shell (200), the gas spring mounting seat (2 b), the supporting legs (3 b) and the caster mounting seat (4 b) are integrally connected;

the caster mounting seat (4 b) of the lower shell part is provided with a mounting hole for mounting a caster;

the upper shell part (100) is made of metal;

the lower shell part (200) is made of plastic.

2. A chair foot according to claim 1, characterised in that: the upper shell part (100) and the lower shell part (200) are clamped.

3. A chair foot according to claim 1 or 2, characterised in that: the upper shell part (100) at least partially covers the lower shell part (200).

4. A chair foot according to claim 1 or 2, characterised in that: the caster mounting seat (4 b) of the lower shell part (200) is hollow and tubular and is integrally connected with the supporting legs (3 b) of the lower shell part (200) through the bottom of the caster mounting seat; the caster mounting seat (4 a) of the upper shell part (100) is sleeve-shaped and is integrally connected with the supporting legs (3 a) of the upper shell part through the upper part of the caster mounting seat; and the caster mounting seat (4 a) of the upper shell part is sleeved on the caster mounting seat (4 b) of the lower shell part and covers the caster mounting seat.

5. A chair foot according to claim 1 or 2, characterised in that: the base (1 a) of the upper housing part (100) covers the base (1 b) of the lower housing part (200).

6. A chair foot according to claim 1 or 2, characterised in that: the gas spring mounting seat (2) of the upper housing part (100) is partially inserted into the gas spring mounting seat (2) of the lower housing part (200).

7. A chair foot according to claim 1 or 2, characterised in that: the supporting legs (3 a) of the upper shell portion (100) cover the supporting legs (3 b) of the lower shell portion (200).

8. A chair foot according to claim 2, characterised in that: the upper shell part (100) and the lower shell part (200) are in clamping fit through a clamping strip (7) and a clamping groove (8); the clamping strip (7) is arranged on the upper shell part (100), and the clamping groove (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 groove (8) is arranged on the upper shell part (100).

9. A chair foot according to claim 8, characterised in that: still including being used for improving resilient clip (5) of joint cooperation intensity between card strip (3) and draw-in groove (4), and the medial surface of resilient clip (5) with card strip (3) elasticity support to press the connection, the lateral surface of resilient clip (5) with draw-in groove (4) elasticity support to press the connection.

10. A chair foot according to claim 9, characterised in that: the elastic clip (5) is made of metal materials and comprises a clip body (51), an inward elastic sheet and an outward elastic sheet which are arranged on the clip body; the inward elastic pieces are obliquely arranged upwards, and the outward elastic pieces are obliquely arranged downwards.