CN112336110A

CN112336110A - Device for adjusting the position of the armrest of a chair

Info

Publication number: CN112336110A
Application number: CN202010789268.3A
Authority: CN
Inventors: 斯特凡·塞雷娜
Original assignee: Brado AG
Current assignee: Brado AG
Priority date: 2019-08-09
Filing date: 2020-08-07
Publication date: 2021-02-09
Also published as: EP3772297A1; US20210037981A1; IT201900014490A1

Abstract

The present application discloses a device for adjusting the position of the armrest of a chair, comprising a clamp (11) stably associated with the chair (3), which selectively interacts with a vertical position selector (29) associated with the box-like body (4) constituting the armrest (2). The vertical position selector (29) is actuatable by means of a device actuatable by the user, and the device comprises a slide (35) slidable under the armrest (2) and adapted to activate/deactivate the actuation of the vertical position selector (29).

Description

Device for adjusting the position of the armrest of a chair

Technical Field

The present invention relates to a device for adjusting the position of an armrest of a chair.

Background

Currently, it is known that chairs comprise a seat, a backrest and side armrests against which a user can rest his forearms.

Known armrests can adjust their position substantially along an axis that is vertical with respect to the ground, or can rotate substantially on a plane that is horizontal with respect to the ground.

However, these known types of armrests have one drawback: since the backrest can swing and the seat can move, the user may take a posture that causes the arms to be anatomically arranged on the armrests in such a manner as to produce a feeling of tension or fatigue because the arms are bent excessively or insufficiently.

Disclosure of Invention

The object of the present invention is therefore to solve the technical problems described, to eliminate the drawbacks of the cited background art and to provide a device that allows to achieve an optimal adjustment of the position of the armrests of the chair, irrespective of the position in which the backrest or the seat is situated.

Within this aim, an object of the invention is to provide a device in which the adjustment and its variation can be carried out quickly and efficiently.

Another object of the invention is to obtain a device in which this adjustment can be achieved and which remains stable in the selected position.

Another object of the present invention is to obtain a device that can be applied also to chairs of known type.

Another object of the present invention is to obtain a device which is structurally simple, inexpensive to manufacture and can be provided with commonly known systems.

This aim and these objects, as well as others that will become better apparent hereinafter, are achieved by a device for adjusting the position of the armrest of a chair, wherein it has a clamp stably associated with said chair, which selectively interacts with a vertical position selector associated with a box-like body that constitutes said armrest, said vertical position selector being actuatable by means of a device that can be actuated by a user, and wherein it comprises a slider that is slidable under said armrest and is adapted to actuate/deactivate said vertical position selector.

Drawings

Further characteristics and advantages of the invention will become more apparent from the detailed description of specific but non-exclusive embodiments, illustrated by way of non-limiting example in the accompanying drawings, wherein:

figure 1 is a view of an armrest comprising a device according to the invention in connection with a chair;

figure 2 is a perspective view of the base of an armrest incorporating a device according to the invention;

FIG. 3 is an exploded view of the armrest and device according to the present invention;

fig. 4 is a bottom view containing the device according to the invention in a use condition and with the lower half-shell removed therefrom;

FIG. 5 is a view of the armrest similar to FIG. 4, with the upper housing half removed;

FIG. 6 is a view taken along section VI-VI of FIG. 5;

FIG. 7 is a view similar to FIG. 4 of a device according to the present invention in a slide activated condition;

fig. 8 is a top view in which the housing 27 and the upper half-housing 6 have been removed;

figures 9 and 10 are side perspective views of two different positions that can be occupied by the clamp and the selector;

FIG. 11 is a view similar to FIG. 6 of the armrest in a different position;

fig. 12 and 13 are side perspective views of the clamp and selector, respectively.

Detailed Description

In the following embodiments, individual features given in relation to specific examples may actually be interchanged with other different features that exist in other embodiments.

With reference to fig. 1 to 13, reference numeral 1 denotes a device for adjusting the position of an armrest 2 associated with a chair 3.

The armrest 2 is provided with a box-like body 4 comprising a lower half-shell 5 and an upper half-shell 6, which can be coupled detachably to each other.

The lower half-shell 5 has, at the rear end 7, a base 8 projecting downwards from the lower half-shell, said base 8 having means suitable for allowing it to be rotatably connected to a support 9 associated with a frame 10 of the chair 3.

The device 1 comprises a clamp 11, which is arranged inside said lower half-shell 5 and is provided with a first body 12 shaped substantially like a parallelepiped and below which two

first tabs

13a, 13b project, which are arranged radially with respect to each other and are housed between a pair of

second tabs

14a, 14b projecting from the base 8, and with a central nut 15, which acts as a seat for a lever 16 of a first pivot 17 rotatably associated with the underlying base 8.

An annular groove 19 is provided on the rod 16, close to its terminal end 18 interacting with the central nut 15, and acts as a seat for a first washer 20 suitable for rotatably interacting with the lower surface of the central nut 15 of the body 12.

The second tab 22 is shaped substantially like a parallelepiped, protrudes from a lateral end of the first body 12 in the direction of the seat 21 of the chair 3 and is directed upwards according to a chosen inclination; a plurality of first teeth 23 are provided at the end of the second tab, project radially and are arranged along an arc centred on a first hole 24 provided transversely to the first body 12 in a region substantially above the central nut 15.

The width of the first tooth 23 is substantially equal to half the width of the second tab 22.

Inside the first hole 24 there is a second pivot 25 for pivoting a wing 26 of a casing 27, which casing 27 can be associated with the lower part of the upper half-shell 6 and is housed in the upper half-shell and partially in the lower half-shell 5.

The casing 27 is connected to the upper half-shell 6 by snap action and to the lower half-shell 5, and therefore to the base 8, by

first screws

28a, 28 b.

The clamp 11 interacts selectively with a vertical position selector 29 associated with the box-like body 4 constituting the handrail 2; in particular, the vertical position selector 29 has a second body 30 shaped substantially like a parallelepiped with a rectangular base, on which a first slot 31 is transversely provided, which serves as a seat for a second screw 32 for connection to said upper shell 27.

A third tab 33 projects from the second body 30 of the vertical position selector 29 in the direction of said second tab 22, adjacent to the clip 11, and is provided with a plurality of second teeth 34 projecting radially at the end of the third tab 33 directed towards said clip 11 and arranged to selectively engage with the first teeth 23 of the clip following a transverse movement applied to the vertical position selector 29 with respect to the clip 11.

This transverse movement is actuated by a slider 35 which can slide longitudinally in the lower region and with respect to the lower half-shell 5, in that it has a wing 36 which can be gripped by the user, from which a projection 37 projects and is slidingly housed in a seat 38 provided longitudinally for the lower half-shell 5, connected at the free end to a longitudinal rod 39 which is in turn associated longitudinally and internally slidingly with respect to the lower half-shell 5.

The longitudinal rod 39 has, at an end 40 directed oppositely with respect to the clamp 11, a hole 41 which serves as a seat for a third screw 42 connected to the projection 37 of the slide 35.

At the end 43 of the longitudinal bar 39 (directed towards the clamp 11) there is a fourth tab 44 having a substantially square plan shape and lying on a plane lower than the plane in which the second body 30 is arranged.

The second slot 45 is provided on the fourth tab 44 and is inclined substantially diagonally with respect to the fourth tab 44.

The third pivot 46 acts at the second slot 45 and projects below the second body 30 in a region adjacent to the first slot 31.

The longitudinal movement of the slider 35, coupled with the movement of the tab 44 carrying the third pivot 46, imparts a certain degree of transverse movement to the second body 30, so as to disengage the second tooth 34 from the first tooth 23; thereby, upward or downward rotation can be imparted to the handrail 2.

There is a first elastically deformable element 47, interposed between a first wing 48, which protrudes from the longitudinal rod 39 adjacent to the third thread 42, and a second wing 49, which protrudes from the lower half-shell 5 at a third slot axially provided for the longitudinal rod 39.

There is a second elastically deformable element 51 interposed between an inner side wall 52 towards which the second body 30 of the lower half-shell 5 moves and a pivot 53 projecting from the facing side of the second body 30.

Once the user stops the actuation of the slider 35, the first and second elastically

deformable elements

47 and 51 respectively allow the slider 35 and the second body 30 to return to their positions.

There are a pair of

fourth screws

54a, 54b suitable for connecting the lower half-shell 5 to the casing 27, these screws preferably being arranged at the sides of the seat 38.

The operation is as follows: starting from the situation shown in fig. 6, when the user wishes to change the inclination of the handrail 2, it is sufficient to grasp the slider 35 with the fingers and pull it towards its free end.

Thereby, a longitudinal movement is applied to the longitudinal rod 39, which in turn exerts a transverse movement on the second body 30 of the vertical position selector 29 until the first tooth 23 is disengaged from the second tooth 34.

The armrest 2 can thus be raised or lowered to a desired position.

When the user releases the slider 35, the first and second elastically

deformable elements

47 and 51 return the second body 30 to its position, so that the first tooth 23 resumes engagement with the second tooth 34.

It has thus been found that the invention has achieved the intended aim and objects, a device has been obtained which allows to achieve an optimal adjustment of the position of the armrests of the chair, irrespective of the position in which the backrest or the seat is located, so that the user can position his arms in an anatomically correct or preferred condition.

Such adjustments and variations thereof can be accomplished quickly and efficiently, and can be accomplished and maintained stable at selected locations.

Moreover, the device can be applied to chairs of known type and is simple in construction, inexpensive to manufacture and can be provided with generally known systems.

Of course, the materials used, as well as the dimensions, to constitute the various parts of the invention may be more pertinent according to specific requirements.

Features that are believed to be advantageous, convenient or the like may also be omitted or replaced by equivalents.

Claims

1. Device (1) for adjusting the position of an armrest (2) of a chair (3), characterized in that it has a clamp (11) stably associated with the chair (3) which selectively interacts with a vertical position selector (29) associated with a box-like body (4) constituting the armrest (2), the vertical position selector (29) being actuated by means of a device that can be actuated by a user and that comprises a slider (35) that can slide under the armrest (2) and is adapted to activate/deactivate the actuation of the vertical position selector (29).

2. Device according to claim 1, characterized in that said box-like body (4) comprises a lower half-shell (5) and an upper half-shell (6) which are mutually detachably coupled, said lower half-shell (5) having, at a rear end (7), a base (8) projecting downwards from said lower half-shell, said base (8) having means suitable for making said base rotatably connected to a support (9) associated with a frame (10) of said chair (3).

3. Device according to claim 2, characterized in that said clamp (11) is arranged inside said lower half-shell (5) and has a first body (12) shaped as a substantially parallelepiped, below which two first tabs (13a, 13b) project, which are arranged radially with respect to one another and are housed between a pair of second tabs (14a, 14b) projecting from said base (8), and is further provided with a central nut (15) which acts as a seat for a lever (16) of a first pivot (17) which can be associated rotatably with said base (8) of the lower layer, an annular groove (19) being provided on said lever (16) close to a terminal end (18) thereof which interacts with said central nut (15), and which accommodates a first washer (20) suitable for interacting rotatably with the lower surface of the central nut (15) of the first body (12).

4. Device according to claim 3, characterized in that a second tab (22) is shaped substantially as a parallelepiped, protrudes from a lateral end of the first body (12) in the direction of a seat (21) of the chair (3) and is directed upwards with a chosen inclination, a plurality of first teeth (23) being provided at the end of the second tab, protruding radially and arranged along an arc of a circle centred on a first hole (24) provided transversely to the first body (12) in a region substantially above the central nut (15), the width of the first teeth (23) being substantially equal to half the width of the second tab (22).

5. Device according to claim 4, characterized in that a second pivot (25) is arranged in said first hole (24) to pivot a wing (26) of a housing (27) associable with a lower portion of said upper half-shell (6) and housed in it and partially in said lower half-shell (5), said housing (27) being connected to said upper half-shell (6) by snap action and to said lower half-shell (5) by first screws (28a, 28b) and in turn to said base (8).

6. Device according to claim 4, characterized in that the vertical position selector (29) has a second body (30), said second body is shaped as a parallelepiped substantially having a rectangular base, a first slot (31) being transversely provided on said second body and housing a second screw (32) for connection to an upper casing (27), a third tab (33) projecting from said second body (30) of said vertical position selector (29) towards said second tab (22), said third tab being adjacent to said clamp (11), and provided with a plurality of second teeth (34) projecting radially at the end of the third tab directed towards the clip (11), the second tooth is arranged to selectively engage with the first tooth (23) of the clamp after a lateral movement applicable to the vertical position selector (29) relative to the clamp (11).

7. The device according to claim 6, characterized in that said transverse movement is actuated by the slider (35) which is longitudinally slidable under and with respect to the lower half-shell (5) and which has a wing (36) which can be grasped by a user, from which a projection (37) protrudes and is slidingly housed in a seat (38) longitudinally provided for the lower half-shell (5), and whose free end is connected to a longitudinal stem (39) longitudinally and internally slidingly associated with respect to the lower half-shell (5), said longitudinal stem (39) having, at an end (40) directed oppositely with respect to the clamp (11), a hole (41) which houses a third screw (42) for connection to the projection (37) of the slider (35), at the end (43) of the longitudinal bar (39) directed towards the clamp (11) there is a fourth tab (44) having a substantially square plan shape and lying on a plane lower than the plane in which the second body (30) is arranged, a second slot (45) being provided on the fourth tab (44) and substantially diagonally inclined with respect to the fourth tab (44).

8. Device according to claim 7, characterized in that a third pivot (46) acts at the second slot (45) and protrudes below the second body (30) in a region adjacent to the first slot (31), the longitudinal movement of the slider (35) matching the movement of the fourth tab (44) that carries the third pivot (46), the longitudinal movement of the slider imparting a certain degree of transverse movement to the second body (30) to disengage the second tooth (34) from the first tooth (23) so as to allow the handrail (2) to rotate up or down.

9. Device according to claim 7, characterized in that it has a first elastically deformable element (47) interposed between a first wing (48) projecting from the longitudinal stem (39) adjacent to the third screw (42) and a second wing (49) projecting from the lower half-shell (5) at a third slot (50) axially arranged with respect to the longitudinal stem (39), the device having a second elastically deformable element (51) interposed between an inner lateral wall (52) of the lower half-shell (5) towards which the second body (30) moves and a pivot (53) projecting from a facing side of the second body (30) which, once the user stops the actuation of the slider (35), the first and second elastically deformable elements (47, 51) allow the slider (35) and the second body (30) to return to respective positions, respectively.

10. Device according to claim 7, characterized in that a pair of fourth screws (54a, 54b) suitable for connecting said lower half-shell (5) to said housing (27) are provided transversely on said seat (38).