BR-202024018313-U2 - ACTIVATION BUTTON FOR CHAIR ARM HEIGHT ADJUSTMENT MECHANISM

Abstract

The following summary for a utility model refers to improvements implemented in the armrest adjustment mechanism of a chair, where the improvement concerns the actuation button (1) which is equipped with an integrated spring (5) and manufactured from the same material as the button (1), said button (1) being composed of two parts (3 and 4) and being installed on the backrest of the armrest (2).

Inventors

• ADRIANO MARCHIORO

Assignees

• ADRIANO MARCHIORO

Dates

Publication Date

20260317

Application Date

20240905

Claims (1)

1. 1- ACTUATING BUTTON, for moving the chain arm, this button (1) being installed on the armrest (2), characterized by: a) - being composed of an external part (3), facing outwards from the armrest, and an internal part (4), facing inwards from the armrest; b) - said external part (3) containing the integrated helical spring (5), a set of fixing claws (6) to fasten this part (3) to the external cover (7) of the armrest (2) and cavities (8 and 9) cooperating with the pins (10 and 11) of the internal part (4); c) - this internal part (4) also containing fixing claws (12 and 13) that fasten to the internal cover (14) of the armrest (2); and d) - having a set of grooves (15 and 16), respectively, on the external face of the external part (3) and the internal part (4) of the button (1).

Description

TECHNICAL FIELD [001] The following descriptive report for a utility model refers to improvements implemented in the chair arm adjustment mechanism, where the improvement concerns the actuation button, which is equipped with an integrated spring made from the same material as the button. STATE OF THE ART [002] The mechanisms for adjusting the height of chair arms generally work similarly to the mechanisms for adjusting the seat height. They can be separated into a few main types: - Gas piston: This uses a gas piston which, when activated by a lever, allows the arm height to be adjusted. To raise it, the user usually needs to lift the lever while removing weight from the arm. To lower it, simply press the lever while applying weight to the arm; - Ratchet mechanism: This type of mechanism allows the height to be adjusted in increments. The user raises the arm to the desired height, and it automatically locks at different levels. To lower it, the user usually needs to raise the arm to the top and then release it so that it descends completely; and, - Manual adjustment: Some models have a manual adjustment, where the user needs to loosen a screw or button, adjust the height, and then tighten it again to secure it. [003] An example of a chair arm adjustment mechanism employing a push button is disclosed in BR202017002093, where the armrest height adjustment mechanism comprises a transverse pin with an inner and outer button mounted via an axial screw; a bushing that surrounds the pin; an outer button spring and two plastic cores that are embedded in the housing and rest on the vertical arm of the support. [004] Another adjustment mechanism employing an actuation button and described in BR202021007066, where the locking element is a single, integral piece comprising a base with a bottom with a triangular cross-section, joined by a spring-shaped elastic element to a button, in turn provided with two lateral pairs of parallel teeth, the spacing of which corresponds to the width of a tooth of the rack. [005] The idea of building the spring integrated into the actuation button is also shared in BR202021016206, where a button is integrated with a plastic spring and, when manually activated, can assume various positions within the racks, allowing the user to move the chair arm up and down, locking it directly through a set of locking tabs. PROBLEMS WITH THE TECHNIQUE [006] The use of a separate spring, as in the case of BR202017002093, causes greater difficulty in assembling the unit and is more prone to wear and tear on the mechanisms, resulting in greater maintenance of the mechanism. [007] The solution implemented in BR202021007066 and BR202021016206 eliminates the separate metal spring and employs a plastic spring integrated into the button. This spring is of the ribbon type, but arranged in a ring shape. This arrangement requires more space for the spring to be housed within the arm cavity, thus making it difficult to use on thinner arms. PROPOSED SOLUTION [008] Thus, due to the considerations pertinent to the problems of the technique previously discussed, one of the objectives of the present utility model is to develop an actuation button for adjusting the height of a chair arm, where the button is fixed without the use of screws. The actuation button is a piece that already has the spring integrated into it, thus eliminating the helical springs of previous systems and even the flat springs of the escape tongue type. The spring integrated into the actuation button is simpler to make, as it is a single injected piece, making it easier to assemble the button in the mechanism, in addition to avoiding problems of spring wear, excessive repairs and a greater number of parts during assembly. DESCRIPTION [009] The characterization of the present utility model is made by means of representative drawings of the actuation button for the chair arm height adjustment mechanism, in such a way that the product can be fully reproduced by appropriate technique, allowing full characterization of the functionality of the object claimed. [010] Based on the elaborated figures that express the preferred way of carrying out the product now conceived, the descriptive part of the report is based, through a detailed and consecutive numbering, where it clarifies aspects that may be implied by the representation adopted, in order to clearly determine the protection now intended. [011] These figures are merely illustrative and may present variations, provided they do not deviate from what was initially requested. [012] In this case, we have: - FIGURE 01 shows a perspective of the outer part of the button, the one that faces outwards from the armrest; - FIGURE 02 shows a perspective of the inner part of the button, the one that faces inwards from the armrest; - FIGURE 03 shows a perspective of the complete button, the outer and inner parts are coupled together; - FIGURE 04 shows orthogonal views of the button and section A-A; and - FIGURE 05