Apparatus for testing the firmness of infant sleep surfaces

Abstract

An apparatus to test, at home, the firmness of a sleep surface to be used by an infant is disclosed. The apparatus is based on the home version of the Australian/New Zealand Standard AS/NZS 8811.1:2013. The apparatus comprises two pieces, one piece is the support to hold a defined weight, and the other piece is used as a scale to visualize how much the piece with the weight sinks into the sleep surface.

Claims

1. An apparatus to test the firmness of a sleeping surface, comprising a hollow circular support base (10) and a measuring ring (20); wherein the hollow circular support base (10), which can accommodate a household product with a defined weight, slides on the inside of the measuring ring (20); wherein the hollow circular support base (10) has a step made from a larger outer diameter and the top of the step defines a reference surface (11) for the support base; wherein the top surface of the measuring ring (20) defines a reference surface (21) for the measuring ring (20); wherein the position of the reference surface (11), of the hollow circular support base (10), with respect to the reference surface (21), of the measuring ring (20), defines if the sleeping surface has a firmness that is within the firmness specified by the apparatus; if the reference surface (11) of the hollow circular support base (10) falls below the reference surface (21) of the measuring ring (20), the sleeping surface does not pass the firmness test; wherein the hollow circular support base (10) can have a printed scale and the position of the reference surface (21), of the measuring ring (20), on the printed scale gives a measure of the firmness of the sleeping surface.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1A Shows the lateral view of the support base (10) of the firmness apparatus and the reference surface on it (11).

(2) FIG. 1B Shows the top view of the support base (10) of the firmness apparatus.

(3) FIG. 2A Shows the lateral view of the measuring ring (20) of the firmness apparatus and the reference surface on it (21).

(4) FIG. 2B Shows the top view of the measuring ring (20) of the firmness apparatus.

(5) FIG. 3A Shows the lateral view of the firmness apparatus.

(6) FIG. 3B Shows the top view of the firmness apparatus.

(7) FIG. 4A Shows the firmness apparatus as if it were on a hard surface and indicates the height defining the specified firmness.

(8) FIG. 4B Shows the firmness apparatus as if it were placed on a sleep surface that passed the test but at the limit sinking of the support base to pass the test.

(9) FIG. 4C Shows the firmness apparatus as if it were placed on a sleep surface that failed the test.

(10) FIG. 5 Shows the support base (10) holding a two liters bottle of soda (30).

DETAILED DESCRIPTION

(11) The firmness apparatus is composed of two parts, the support base (10) and the measuring ring (20). The support base accommodates a household product with a defined weight, such as a bottle of soda, and it can slide through the measuring ring (20). The measuring ring (20) has a very small weight and therefore will not sink into the sleep surface when placed on top of it. Also, the measuring ring has such a dimension, external diameter, that it will not be affected by the