CN1157141C

CN1157141C - Chair base

Info

Publication number: CN1157141C
Application number: CNB018043852A
Authority: CN
Inventors: ��ֶ�; 沃尔夫冈·戴西格
Original assignee: TK Canada Ltd
Current assignee: TK Canada Ltd
Priority date: 2000-02-16
Filing date: 2001-02-16
Publication date: 2004-07-14
Anticipated expiration: 2021-02-16
Also published as: MXPA02007905A; EP1255470A2; CN1400876A; US20030111887A1; AU2001235276A1; WO2001060206A2; NO20023534L; CA2400225A1; WO2001060206A3; NO20023534D0; DE20002799U1

Abstract

An anti-tipping chair base has a central support member with a generally upright axis, and a plurality of arms that extend generally radially outwardly from the axis and each of which is provided with a caster. An outer end portion of the arm has a shape that curves downwardly around the caster to an end edge outwardly of the caster. As seen in plan, the outer end portion of the arm has side edges that diverge in a direction towards the end edge and between which the end edge extends generally normal to the radial direction of the arm. The end portions of the arm comprise support elements that contact a surface on which the base is disposed in the event that the base tips in use.

Description

Seat base

Technical field

The present invention relates to a kind of the so-called of office seating that for example be used for prevents toppling over " seat base.

Background technology

DE-GM7344658 discloses a kind of seat base, and this base has a plurality of support arm and each support arm that extend from the centre strut outward radial and has castor in its outer end.Each castor is surrounded by a bell-shaped piece, and the outline of this bell-shaped piece has the one or more lower limbs that are used as support member when seat tilts.The shortcoming here is, the corresponding lower limb of these support members near ground, and is supported on uncertain position when seat tilts when seat base is in normal condition.

Summary of the invention

The objective of the invention is to improve the effectiveness of seat base when being in heeling condition.

According to the present invention, a kind of anti-seat base of toppling over is provided, it comprises center support and a plurality of support arm that extends from the common outward radial of axis with common vertical axis, and each support arm all is provided with castor near the outer end of this support arm.The outer end of each support arm has such shape, and it is bent downwardly towards the outside ora terminalis of castor around castor, from the plane, by limiting along the side of telling towards the direction of ora terminalis, and has between side and the radially common vertically extending ora terminalis of support arm.The end of corresponding support arm includes support member, in case base in use tilt, this support member just with its on this base is being set the surface contact.

One embodiment of the invention dream up a kind of fork-shaped support elements, and its two forks are coupled together by the horizontal brace rod of necessity.Like this, each support member forms the support point that limits with adjacent support arm in the given arbitrarily heeling condition of seat, even this just means that when castor inwardly rotates seat also can firmly support on the ground in the heeling condition arbitrarily at it.

Connecting rod is along curved from the outside direction in base center.This user who just prevents seat is clipped in pin between two forks because of carelessness.

Description of drawings

In order more to be expressly understood the present invention, now accompanying drawing to be introduced, these accompanying drawings specify particular preferred embodiment of the present invention with example, and they are:

The perspective view of Fig. 1 for seeing from the top of the present invention's five support arm seat bases;

Fig. 2 is the plane corresponding with Fig. 1;

Fig. 3 is the inwardly plane of the outer end portion of one of them support arm of rotation of its castor;

Fig. 4 is the side elevation view corresponding with Fig. 3;

Fig. 5 is the forward sight elevation corresponding with Fig. 3;

Fig. 6 is the forward sight elevation of base, represents that a castor inwardly rotates, and a castor outwards rotates; With

Fig. 7 is the view similar to Fig. 6, and expression is in the base of heeling condition.

The specific embodiment

Of the present inventionly anti-topple over seat base and comprise center support 2 and a plurality of support arm 3 that extends from the common outward radial of axis A-A with common vertical axis A-A.Each support arm is provided with castor 4 near the 3a of the outer end of this support arm.

As being clear that in Fig. 4,6 and 7, the outer end 3a of each support arm has around castor towards the outside reclinate shape of ora terminalis 3b of castor.The shape of this outer end by limiting along the side 3c that tells towards the direction of ora terminalis 3b, and has between side and the radially common vertically extending ora terminalis 3b of support arm from the plane.Therefore, the end 3a of corresponding support arm is provided with support member, in case base in use tilts, this support member just contacts with the surface of being furnished with base.

To be described in more detail below, these accompanying drawings are represented one embodiment of the invention, and wherein the outer end 3a (support member) of each support arm is generally fork-shaped, and a bar that extends is arranged between its bifurcated outer end.But this fork-shaped is not important for the present invention.In another embodiment, the outer end 3a of each support arm can be common plane (atresia) triangle.

Now more specifically with reference to description of drawings, the center support 2 of base 1 is designed to adorn the seat of seat and the pillar that the backrest module (not shown) is used; Typically, element 2 is a hollow cylinder.

Seat base 1, element 2 and support arm 3 can be made by metal or plastics, and can make an integral body.Castor 4 is traditional two rollers, and this is taken turns along corresponding horizontal axis B-B and rotates (Fig. 2).Each castor sells 5 in addition, and this pin is installed along the vertical axis 6 of corresponding support arm 3, causes castor to rotate around axis 6.

The support member of each support arm 3 (3a) can be made an integral body with support arm 3 or make separately, and its material can be metal or plastics.In this embodiment, support member 3a is a fork-shaped, and two bifurcateds of telling approximately become 60 ° to form two supporting-points 9,10 (Fig. 3,4 and 5) of separating of level each other.In that seat base 1 central axis A-when A was in plumbness, 9,10 of supporting-points were positioned at and ground distance 3 to 10mm places (Fig. 4).The supporting-point 9,10 of two adjacent opposed forks 8 of adjacent support arm 3 forms effective standing surface, when it is in heeling condition at seat base 1, makes the base of seat (especially office seating) keep required stability.These two forks 8 are connected by the horizontal brace rod 11 outwards curved with respect to the central axis A-A of seat base 1.

The seat base 1 that the present invention has a fork-shaped support elements 3a meets the Deutsche industry norm (DIN) (DIN 445/52) of rotatable office chairs stability.Minimum range between the straight line that the measuring of stability is defined as connecting two adjacent supporting-points 9,10 and the pivot center A-A of seat.

Supporting-point the 9, the 10th, those points that always contact in the activity of seat or the rigid element with ground.When using castor, should be starting point to the worst castor of stability position.Except desired stability is measured, also can improve stability, here because the supporting structure of each support arm all extends through relevant castor 4 a little by the fork-shaped support elements 3a of seat base 1.At this moment, the fork 8 of support member 7 is overhead at interval 3 to 10mm.Castor 4 (Fig. 7) towards base 1 central axis A-A inwardly rotate extremely take a seat state the time, can prevent toppling over of base 1 and office seating.

Support member 3a can also can make as a whole with plastics, aluminium or steel with making with support arm 3 identical materials.Support member 3a makes independent parts with aluminium, steel or plastics, refills on the major part of the support arm 3 that castor 4 is housed.

Certainly self-evident, the explanation of front only relates to particular preferred embodiment of the present invention, and in vast scope of the present invention many improvement can be arranged.Wherein some improvement is pointed out in front, and other then comes into plain view for those of ordinary skills.Very obvious, the profile of the base shown in the accompanying drawing is an example.Of the present inventionly anti-topple over feature and can be applied on the base of other structure (support arm of varying number and shape and dissimilar castors).

Claims

1. prevent toppling over seat base for one kind, comprise center support and a plurality of support arm that extends from the common outward radial of described axis with vertical usually axis, and each support arm all is provided with castor near the outer end of this support arm, wherein the described outer end of each support arm has such shape, it is bent downwardly towards the outside ora terminalis of castor around castor, from the plane, by limiting along the lateral edges of telling towards the direction of described ora terminalis, and between side, have and the radially common vertically extending described ora terminalis of support arm, the described end of corresponding support arm comprises support member, in case described base in use tilts, this support member just with its on described base is being set the surface contact.

2. seat base as claimed in claim 1 is characterized in that: the outer end that includes each support arm of described support member is a fork-shaped, and it comprises a pair of bifurcated and the cross bar that is connected described bifurcated outer end.

3. seat base as claimed in claim 2 is characterized in that: described connecting rod is curved from the outside direction of the axis of center support.

4. as each described seat base in the claim of front, it is characterized in that: the outer end that includes each support arm of described support member be one with the remainder of support arm parts independently.