IN AN ARTICUUATIN G BED

BACKGROUND

Field

[Para 1 ] This invention relates generally to the field of articulating beds and more particularly to an environmental control system for an articulating bed having a compact cartridge fan system for close engagement in a horizontal support section of the bed.

Description of the Related Art

[Para 2] Articulating beds have long been used in hospital and healthcare facilities to allow positioning of a patient in a reclining position, sitting position, elevated leg position or combinations of these positions. General usage of articulating beds has been rapidly expanding due to the comfort and convenience available from adjusting the bed to desired positions for reading, general relaxation or sleeping. Typical articulating beds provide an upper body positioning element and a thigh and lower leg positioning element either individually active or with combined actuation.

[Para B] New foam mattresses typically employed with articulating beds make overheating or, in certain occasions overcooling of the occupant during sleep.

Environmental control systems are being introduced to cool or heat the mattress or provide heated or cooled airflow to maintain comfortable sleeping conditions. However, designs of modern bedding require a reduced thickness profile and reduced movement of ancillary components is preferable.

[Para 4] It is therefore desirable to provide an articulating bed having an environmental control system that minimally impacts operation of the articulation system of the bed.

SUMMARY

[Para 5] The embodiments disclosed herein overcome the shortcomings of the prior art by providing a compact cartridge fan system for use in an articulating bed structure having a stationary horizontal support panel. The system includes a frame adapted to be engaged in a receiving aperture in the stationary horizontal support panel. A cartridge is removably received in a receiving aperture in the frame. The cartridge has a case containing a box fan and a connector attachment. A connector is engaged in the connector attachment and adapted to be received through a mattress base supported on the stationary support panel.

[Para 6] BRIEF DESCRIPTION OF THE DRAWINGS

[Para 7] These and other features and advantages of the present invention will be better understood by reference to the following detailed description of exemplary embodiments when considered in connection with the accompanying drawings wherein:

[Para 8] FIG. 1 is An upper pictorial representation of an articulating bed system in which implementations described herein may be employed;

[Para 9] FIG. 2 is a lower pictorial representation of the articulating bed system of FIG. 1 with the cartridges installed;

[Para 1 0] FIG. 3 is an upper pictorial representation of the frame installed in the fixed seat support, the cartridge and the connector;

[Para 1 1 ] FIG. 4 is a side view of the frame, cartridge and connector;

[Para 1 2] FIG. 5 is a bottom view of the frame and cartridge;

[Para 1 B] FIG. 6 is an upper head end pictorial representation of the frame, cartridge and connector;

[Para 1 4] FIG. 7 is an upper foot end pictorial representation of the frame, cartridge and connector;

[Para 1 5] FIG. 8 is an exploded pictorial representation of the elements of the cartridge fan system;

[Para 1 6] FIG. 9 is a side partial section view of the articulating bed system and mattress base showing the cartridge fan system as installed;

[Para 1 7] FIG. 10 is a pictorial detailed section view of the articulating bed system and mattress base showing the cartridge fan system as installed;

[Para 1 8] FIG. 11 is a detailed partial section view of the frame as installed in the fixed seat support;

[Para 1 9] FIG. 12 is a side view of the articulating bed with the head support in an articulated position; [Para 20] FIG. 13 is a side view of the articulating bed with the head support in an articulated position showing an exemplary mattress top pad with flow channels and interconnection with the cartridge fan system connector shown in phantom.

DETAILED DESCRIPTION

[Para 21 ] Implementations shown in the drawings and described herein provide a compact cartridge fan system which is easily integrated into an articulating bed structure. The cartridge fan system is engaged in a stationary horizontal support panel in the articulating structure. A frame is inserted through an aperture in the horizontally fixed support element for each desired cartridge. In the implementation shown and described herein, two cartridges are employed but a larger plurality of cartridges may be used in alternative implementations. A cartridge incorporating a box fan and a filter bracket supported in a case having resilient engagement elements is received in the frame and depends from the stationary horizontal support element intermediate structural and actuating elements of the articulating bed structure. The case incorporates a connector attachment, in flow communication with the fan, into which a vertical connector is received. The connector protrudes through a mating aperture on a mattress base resting on the stationary horizontal support panel. Air drawn into the cartridge by the fan flows through the filter element, connector attachment and connector to provide distribution of environmental air flow. A piezo electric cooling and heating block may be positioned intermediate the filter element and box fan to cool or heat the incoming air prior to distribution from the cartridge.

[Para 22] FIG. 1 of the drawings shows an exemplary articulating bed structure 10 in which the exemplary implementations of the compact cartridge fan system may be employed. The articulating bed structure 10 incorporates a frame 12 supported by legs 14. An upper body support panel 16 is pivotally attached to a first horizontal seat support 18. The upper body support panel may be articulated to raise a portion of a supported mattress as will be described subsequently. For the particular articulating bed structure 10 the first horizontal seat support and upper body support panel are mounted on a translating carriage to provide a wall hugging effect as disclosed in US patent application 15/752,578 and was filed on 2/13/2018 entitled ELECTRIC, the disclosure of which is incorporated herein by reference. A stationary horizontal support panel 20 is mounted to the frame 12. Thigh support panel 22 is pivotally attached to the stationary horizontal support panel for articulation and a lower leg support panel 24 is pivotally attached to the thigh support panel. Articulation of the thigh and lower leg support panels may be accomplished as is well known in the art.

[Para 23] For each compact cartridge fan system a frame 26 having a central aperture 28 is inserted through an appropriately sized receiving aperture 29 in the stationary horizontal support panel 20. As seen in FIG. 2, a cartridge 30 is inserted into and depends from the frame 26. The cartridge 30 is positioned by the frame 26 to rest in open volume under the support panels between the frame elements and with clearance from articulating structure elements such as upper body panel actuator assembly 32. While shown for the exemplary implementation as aligned parallel to the head end frame element l3a and foot end frame element l3b, the cartridges 30 and associated frames 20 may be oriented parallel to the side frame elements l3c.

[Para 24] As seen in FIG. 3, the cartridge 30 has a case 34 with at least one resilient engagement element 36 and an upper flange 38 to be received in the frame 26. A connector attachment 40 is adapted to receive a connector 42 to provide flow distribution through a mattress base 62 (seen in FIG. 2). Details of the cartridge fan system are seen in FIGs. 4 - 7. Case 34 incorporates a filter 44 (shown only as the support matrix or bracket but without the filter element for clarity) which is received in an engagement slot 46 which surrounds an inlet aperture 48. As seen in FIG. 8 which shows the internal elements of the cartridge 30, the case 34 is split into two halves 35a and 35b to receive a box fan 50. A piezoelectric cooling/heating element 52 is inserted between the inlet aperture 48 and the box fan 50. The piezoelectric cooling/heating element 52 has a plurality of flow channels 54 through which air entering from the inlet aperture 48 flows to be cooled or heated (with the element operational) or merely transitioned to the box fan for distribution. The box fan outlet 56 is oriented upwards and aligned for flow communication with the connector attachment 40 on the top of the case 34. The connector 42 has an attachment ring 58 adapted to be received in the connector attachment 40. While shown as substantially cylindrical in the exemplary implementation the flow conduits created by the connector 42 and connector attachment 40 may have other geometric cross sectional shape. The connector additionally has a top flange 60 which is employed to engage a top surface of the mattress base 62 as will be described in greater detail subsequently.

[Para 25] The filter 44 is easily removable, without disassembly or removal of the cartridge from the frame, for cleaning or replacement by sliding vertically out of the engagement slot 46 in the case 34. The engagement slot 46 opens into the aperture 28 and a tab 64, which extends into the aperture 28 within the frame 26, is provided to facilitate insertion and removal. Electrical power connectors 65 for the box fan 50 and piezoelectric cooling and heating element 52 is provided at a electrical connection port 66 in a side of the case. Electrical connection of the fan and piezoelectric cooling/heating element are conventional and not shown for clarity.

[Para 26] As seen in FIGs. 9 and 10, the cartridge 30 is supported in the frame 26 and depends into open volume in the articulating bed structure. The cartridge 30 is removably inserted in the frame 26 prior to placement of the mattress base 62 onto the support panels 16, 18, 20, 22 and 24. The cartridge 30 is also easily removable from the frame 26 by disengaging the resilient engagement element 36 and lifting the cartridge upward through the aperture 28 in the frame 26. As seen in FIG. 11, the frame 26 is engaged in the receiving aperture 29 in the stationary horizontal support 20. The frame 26 includes an upper lip 70 extending over the periphery of the receiving aperture 29 with holes 72 through which screws or other fasteners are received to secure the frame to the support. The frame 26 additionally includes a peripheral bottom web 74 (also seen in FIG. 5) which is adapted to closely receive the cartridge 30 and engage the upper flange 38 to support the cartridge in the frame. A relief 76 in the web 74 exposes the filter 44 for insertion and removal as previously described.

[Para 27] Returning to FIGs. 9 and 10, the connector 42, for the exemplary implementation, is a spirally corrugated tube nominally sized to accommodate a thickness of the mattress base 62 but allowing flexible extension during installation allowing attachment ring 58 to be easily inserted into the connector attachment 40 when mattress base 62 is placed on the support panels of the articulating bed structure. The top flange 60 of the connector is adapted to be secured to an upper surface 68 of the mattress base 62. [Para 28] As seen in FIGs. 12 and 13, articulation of the upper body support panel 16 to elevate the head portion of the mattress base 62 does not created substantial motion in the mattress base over the stationary horizontal support 20. Minor movement can be accommodated by the flexible corrugations of connector 42. A flow distribution pad 78, shown as an exemplary notional implementation in phantom in FIG. 13, is received on top of the mattress base 62. An air inlet 80 in the flow distribution pad 78 is positioned over the connector 42 extending through the mattress base 62. A plurality of flow channels 82 in flow connection with the air inlet 80 extend through the flow distribution pad 78 terminate in air outlets 84 disbursed over the surface of the flow distribution pad providing heated, cooled or ambient air from the compact cartridge fan system.

[Para 29] Having now described various embodiments of the invention in detail as required by the patent statutes, those skilled in the art will recognize modifications and substitutions to the specific embodiments disclosed herein. Such modifications are within the scope and intent of the present invention as defined in the following claims.