Patent Application
20130017013
This invention relates to connector assemblies for slideably connecting removable parts of an object such as an adjustable chair, although the connector assembly according to the invention may be used for other suitable applications.
In EP1411801B there is described an adjustable chair moveably mounted for relative vertical and tilting movement with respect to a chassis and which includes a pair of side walls preventing or inhibiting access from the side of the chair to the underside of the chair seat above the chassis, and between the chair seat and the side walls are a pair of planar arm rests removeably fixed to the chair body so that as the chair rises or falls or tilts forwards or backwards the armrests follow the movement of the chair. As with all such mechanical equipment it is often necessary to dismantle parts of the chair for repair or transport through the use of common fixings such as threaded fasteners which are therefore time consuming to assemble and disassemble.
For connecting ordinary domestic lounge chairs together to form, e.g., a corner unit or a sofa it is common practice to use connector assemblies comprising tapered tangs connected to one side of the furniture element, the tang being insertable in a correspondingly shaped channeled bracket affixed to the other side of an adjacent chair element, so that they are easy to assemble into a rigid unit. A particular advantage of connector assemblies using tapered tangs and correspondingly shaped channeled brackets is that they are much easier to locate and connect to adjoining elements of furniture since the taper acts as a guide and can thus ensure connection between, e.g., upholstered elements that would otherwise be blind due to the presence of the upholstery. However, more particularly in the case of adjustable chairs having, e.g., upholstered elements requiring occasional replacement of armrests and side panels requiring occasional removal for servicing the actuating mechanism of the adjustable chair, it has been found that, for safety reasons, the angle of taper has to be relatively shallow, typically 5° to the vertical, so as to ensure that when the chair is tilted it remains in position even when occupied. This can lead to such a shallow-tapered tang becoming wedged within its respective bracket, thereby making it difficult to become disengaged and possibly leading to damage during attempted disengagement.
The present invention is derived from the realization that, when connected, adjacent elements of furniture which are intended to be removable but which, in use, are also intended to move generally laterally along with, e.g., the seat of a chair, are more safely connected by a tang having substantially parallel sides which may thereafter be releasably secured in place adjacent to correspondingly shaped channel, but which also includes at or near its respective ends tapers to allow the tang to be easily located in a respective channel of substantially the same shape and to bear substantially vertical loads.
According to the invention there is provided a connector assembly comprising or including a tang adapted to be secured to a first element and a correspondingly shaped channeled bracket adapted to be secured to a second element, the tang being tapered bluntly inwardly at its leading end, being substantially parallel in its mid portion, and being tapered bluntly outwardly at its end remote from its leading end, the arrangement being such that the inwardly facing taper of the tang is adapted to be received initially within the outwardly tapered channeled bracket, which thereafter guides the tang into the channel up to the limit imposed by the presence of the outwardly extending part of the tang as it is received within the correspondingly shaped part of the bracket.
With this arrangement, the tang and hence bracket can have relatively blunt tapers, i.e., not shallow, which bear the generally vertically imposed loads whilst still retaining the advantage of being able to guide the parallel sides of the tang, which bear the generally horizontally imposed loads, into the parallel-sided parts of the channel in the bracket. Hence, lateral or planar rocking movement between the first and second elements is substantially eliminated. In the event that the first element is required to be disconnected relative to the second element it may simply be slid along the major axis of the tang and channel with little or no risk of either being jammed with respect to the other as a result of the presence of the blunt tapers, which are preferably around 20° to the vertical relative to a vertically disposed connector assembly.
Conveniently, locking formations are provided on or in the tang or bracket by which the tang may be releasably secured to the bracket when the first and second elements are connected together. In particular, a spring clip forming part of the bracket may include a bore into which a correspondingly shaped stud on part of the tang, such as at or near its leading end may be received when the tang is fully inserted into the bracket, the arrangement being such that, for disassembly, part of the spring clip is simply lifted away from the tang and hence locking stud to thereafter release the tang for removal from the bracket by being slid along the major axis of the tang.
The invention also extends to furniture having one or more detachable parts interconnected by a connector assembly according to the invention.
The invention will now be described, by way of example only, with reference to the accompanying drawings in which:
Referring firstly to
The tang 2 has a blunt inwardly tapered leading end 4 of around 20° to the vertical, a mid portion 5 having substantially parallel sides and a blunt outwardly tapered lower end 6, also around 20° to the vertical, extending from a fixing plate 7 by which the tang 2 may be secured to a first element of, e.g., furniture (not shown).
The channeled bracket 3 comprises a back plate 8 onto which is secured by, e.g., welding a tang-receiving channel or sleeve 9 having inwardly tapering neck portions 10 at its upper end, a parallel-sided mid portion 11 and an outwardly tapering lower end shoulder portions 12.
In the assembled condition shown in
In the embodiment shown in
In another embodiment, not shown, the spring clip 16 may be provided with a stud releasably biased to be received within a correspondingly shaped bore within the tang 2.
The invention therefore provides the benefits of using tapered edges or formations which enable the respective parts of the connector assembly 1 to be easily guided and assembled with respect to each other, whereafter the tapers themselves substantially bear the generally vertical mechanical loads required of the connector assembly when assembled, whereas any generally horizontal loads are substantially transferred to and borne by the parallel edges and formations of the tang 2 and the sleeve or channel 9 of the bracket 3. Because the various tapers may therefore be more blunt than heretofore, they carry substantially no lateral load bearing function, and are correspondingly less likely to become jammed with respect to each other. However, they are still tapered sufficiently to act as guides for initially connecting adjacent elements, such as chairs and armrests to each other, whereafter they become releasably locked together.
| Number | Date | Country | Kind |
|---|---|---|---|
| 1004513.6 | Mar 2010 | GB | national |
This application is filed under 35 U.S.C. 111(a) as a continuation of International Patent Application No. PCT/GB2011/050375, filed Feb. 25, 2011 and claiming priority of Great Britain Patent Application No. 1004513.6, filed Mar. 18, 2010, which applications are incorporated herein by reference to their entireties.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/GB2011/050375 | Feb 2011 | US |
| Child | 13622237 | US |
