Combination long chair and simple bed

The sofa-cum-cot adjusts resilience through elastic bands and locking mechanisms to address discomfort issues, ensuring comfort as both a bed and a couch.

WO2025258109A1PCT designated stage Publication Date: 2025-12-18YOSHIMURA TSUTOMU
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Patent Information

Application Number
PCT/JP2024/080178
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-06-11
Filing Date
2024-10-11
Publication Date
2025-12-18

AI Technical Summary

Technical Problem

Existing sofas and cots that function as both a couch and a bed face issues with resilience mismatch, where the cushioning is unsuitable for both uses, causing discomfort and pain when used as a bed due to excessive sinking or inadequate support.

Method used

A sofa-cum-cot design featuring a seat member with elastic bands and a support device, allowing the sheet member to be locked or unlocked for varying resilience, providing comfort as a bed or stability as a couch by adjusting the tension between the sheet member and elastic band cover.

Benefits of technology

The design enhances user comfort by adapting resilience based on use, reducing discomfort and pain, especially when sleeping on the back, while maintaining stability as a couch.

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    Figure JP2024080178_18122025_PF_FP_ABST
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Abstract

Provided is a combination long chair and simple bed composed of a seat member and rod members, an elastic band, an elastic band cover member, and a support tool, wherein it is possible to switch between activating and inactivating an expansion / contraction function of the elastic band disposed on the seat member. The seat member has rod members at both ends in the longitudinal direction, and the elastic band is disposed in parallel with the longitudinal direction of the seat member. The support tool supporting the seat member is composed of a plurality of support leg parts, and is locked to the rod members by a holding lock part. The seat member and the elastic band cover member have locking parts for locking each other. When the locking part is unlocked, the expansion / contraction function of the elastic band is activated, and the seat member has elasticity. On the other hand, when the locking part is locked, the expansion / contraction function of the elastic band is inactivated, and the tension of the seat member and the elastic band cover member can be stably maintained.
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Description

Bench and cot

[0001] The present invention relates to a sofa-cum-cot that can be used as both a sofa and a cot.

[0002] The simple bed shown in Patent Document 1 has rod members at both longitudinal ends of the seat member, and the support legs that are perpendicular to the two rod members are engaged with embracing engaging parts, so that it can be used as both a couch and a simple bed.

[0003] JP 2014-91046

[0004] The above-mentioned cot can be used as both a bed and a couch, but the resilience of the sheet member suitable for use when used as a bed differs from that when used as a couch. A cot with a resilience suitable for use as a bed is unsuitable for use as a couch because the sheet member sinks in too much when the user sits on it, while a cot with a resilience suitable for use as a couch has the problem that the greatest resilience from the sheet member is applied to the user's buttocks when sleeping on their back, causing pain in the buttocks. The object of the present invention is to provide a cot / couch that can switch the resilience of the sheet member when used so that it can be used comfortably both as a bed and as a couch.

[0005] The sofa / simple bed of claim 1 of the present invention comprises a seat member having space that can be used as a bed and an elastic band cover member, the seat member having rod members at both longitudinal ends and a support device that supports the seat member from below, the support device being composed of multiple support legs, one or multiple rows of elastic bands arranged parallel to the longitudinal direction of the seat member, and both the seat member and the elastic band cover member having locking portions that lock them together.

[0006] In the present invention, by releasing the locking portion and making the sheet member elastic, the sheet member fits the user's body more easily, making it more comfortable to use, and also alleviating the repulsive force from the sheet member to the user's buttocks when sleeping on their back, which is expected to reduce pain in the buttocks associated with use, making it suitable for use as a ped. On the other hand, when the locking portion is locked, the elastic band does not activate its stretching function, and the tension between the sheet member and the elastic band cover member is maintained stably, making it suitable for use as a couch.

[0007] Fig. 1 is a diagram showing the state in which the present invention is used as a bed (Embodiment 1). Fig. 2 is a diagram showing the state in which the present invention is used as a bench (Embodiment 2). Modes for carrying out the invention

[0008] 1 shows the state in which the sheet member 1 is used as a bed, and the sheet member 1 becomes elastic due to the activation of the expansion and contraction function of the elastic bands 5 arranged on the sheet member 1. In this embodiment, the elastic bands 5 are made of rubber material and arranged in only one row at one end, but the number of rows and the location of the rows are not limited as long as they are parallel to the longitudinal direction of the sheet member 1, and may be arranged at both ends or the center of the sheet member 1, and any elastic body such as rubber or springs may be used for the elastic bands 5, with one or more per row.

[0009] 2 shows the state in which it is used as a chaise longue, with the seat member 1 and the elastic band cover member 6 fastened by the fastening portion 7, the elastic band 5 does not stretch, and the tension between the seat member 1 and the elastic band cover member 6 is kept stable. In this embodiment, the fastening portion 7 uses a zipper, but any material such as a hook-and-loop fastener or a hook and eye fastener can be used.

[0010] REFERENCE SIGNS LIST 1 Sheet member 2 Rod member 3 Leg member 4 Embracing and locking portion 5 Elastic band (rubber member) 6 Elastic band cover member 7 Locking portion (zipper)

Claims

1. A sofa / cot having a seat member and an elastic band cover member with space that can be used as a bed, the seat member having rod members at both ends in the longitudinal direction and a support device that supports the seat member from below, the support device being composed of multiple support legs, one or multiple rows of elastic bands being arranged parallel to the longitudinal direction of the seat member, the elastic bands being composed of at least one or more elastic bodies, and the elastic band cover member and the seat member both having locking parts that lock them together.

Citation Information

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