Cushion and mold for cushion

Abstract

A bed cushion providing a soft feeling without bottomed feeling and providing a cushionability even against a small load and a durability, and a bed using the cushion; a forming die for cushion capable of smoothly and neatly releasing a product by reducing a sticky feeling and a blocking produced when releasing the cushion formed by using elastomer; the cushion, comprising thin-walled partition walls erected parallel with each other generally in a lattice shape in plan view, whereby a soft contact feeling near a water bed can be provided while preventing air blow noise from being produced by a user.

What is claimed is: Claims of an invention of the present application are as described below.  
     
         1 . A bed cushion with thin and vertical diaphragms to be buckled when pressed arranged in a lattice, characterized in that said diaphragms are made of elastomer having Shore A hardness of 20 to 40.  
     
     
         2 . The bed cushion according to  claim 1 , characterized in that the lattice is in a square shape, a length to width ratio thereof being substantially identical to a length to width ratio of a bed.  
     
     
         3 . The bed cushion according to  claim 1 , characterized in that the elastomer forming the diaphragm is styrene based elastomer.  
     
     
         4 . The bed cushion according to  claim 2 , characterized in that the elastomer forming the diaphragm is styrene based elastomer.  
     
     
         5 . A bed characterized in that the bed cushion according to  claim 1  is placed in a fixing frame in which said cushion is fitted, an upper edge of said cushion being coupled to an upper edge of the fixing frame.  
     
     
         6 . A bed characterized in that the bed cushion according to  claim 2  is placed in a fixing frame in which said cushion is fitted, an upper edge of said cushion being coupled to an upper edge of the fixing frame.  
     
     
         7 . A bed characterized in that the bed cushion according to  claim 3  is placed in a fixing frame in which said cushion is fitted, an upper edge of said cushion being coupled to an upper edge of the fixing frame.  
     
     
         8 . A mold for a cushion, characterized in that a mold for a cushion with thin diaphragms arranged in a lattice on plan view comprises a first mold and a second mold, said first mold having a predetermined number of first protrusions provided in a standing manner in substantially square prisms and insertion spaces formed between the first protrusions, the first protrusions and the insertions spaces being alternately arranged like a checkerboard in one plane, while the second mold, in a fitted state to said first mold, having insertion spaces in which the respective first protrusions of the first mold are inserted with gaps to be cavities for forming diaphragms left, and second protrusions to be inserted in the insertion spaces of said first mold with predetermined gaps left, the second protrusions and said insertions spaces being alternately arranged like a checkerboard in one plane, a side surface of each of the first protrusions of said first mold and a side surface of each of the second protrusions of the second mold being provided with substantially identical drawing gradients, a gap to be a cavity for forming the diaphragm is secured between the side surfaces of the first protrusion and the second protrusion in a fitted state, comers at a base of each first protrusion provided in said first mold being chamfered to form chamfered portions, simultaneously therewith, chamfered portions being respectively formed on comers at a base of each second protrusion provided in said second mold, in a fitted state, a gap to be a cavity for forming the diaphragm being formed around each tip of said first protrusion and second protrusion, a gap to be a cavity for forming a communication diaphragm that provides communication between comers of the gap being formed between the chamfered portions of said first protrusion and second protrusion, and in a fitted state of the first and second molds, an outer frame surrounding four peripheral surfaces thereof with a gap to be a cavity left.  
     
     
         9 . The bed cushion having thin and vertical diaphragms to be buckled when pressed arranged in a lattice, characterized in that said diaphragms are made of elastomer having Shore A hardness of  20  to  40 , and a resilience reinforcing agent is mixed into said elastomer.  
     
     
         10 . The bed cushion according to  claim 8 , characterized in that said resilience reinforcing agent is hydrozincite.  
     
     
         11 . The bed cushion according to  claim 10 , characterized in that said diaphragm is made of elastomer and contains lubricant of 0.3 to 10 parts by weight with respect to said elastomer of 100 parts by weight.  
     
     
         12 . The cushion according to  claim 8 , characterized in that the lubricant is fatty acid based lubricant.  
     
     
         13 . The cushion according to  claim 9  characterized in that the cushion body formed by said mold for a cushion is made of gel consisting of elastomer to which a softener is added.  
     
     
         14 . A cushion made of elastomer integrally formed with elastic thin diaphragms arranged in a lattice on plan view, characterized in that an air vent is provided in a predetermined position of said diaphragm.  
     
     
         15 . The cushion according to  claim 14 , characterized in that said diaphragm has a section tapered from a lower portion to an upper portion.  
     
     
         16 . The cushion according to  claim 14 , characterized in that the air vent is provided at a height ranging from 60% to 80% of a height of the diaphragm.  
     
     
         17 . The cushion according to  claim 15 , characterized in that the air vent is provided at a height ranging from 60% to 80% of a height of the diaphragm  
     
     
         18 . A mold for a cushion, characterized in that a mold for a cushion with thin diaphragms arranged in a lattice on plan view comprises a first mold, a second mold, and an outer frame, said second mold having a predetermined number of protrusions provided in a standing manner in substantially square prisms, and having, in insertion spaces formed between the protrusions, space keeping protrusions formed in a protruding manner at a predetermined height, the space keeping protrusions and said protrusions being alternately arranged like a checkerboard in one plane, the first mold having inserting portions in which the respective protrusions of the second mold being inserted with gaps to be cavities for forming the diaphragms left, and middle protrusions to be inserted in the insertion spaces of the second mold and, with gaps to be cavities for forming the diaphragms left, to be abutted against protrusion end surfaces of the space keeping protrusions in the insertion spaces with shapes thereof matched, alternately arranged like a checkerboard in one plane, and an outer frame surrounding four peripheral surfaces thereof with gaps to be cavities left.  
     
     
         19 . A cushion made of elastomer integrally formed with elastic thin diaphragms arranged in a lattice on plan view, characterized in that an upper edge of said diaphragm is thinner than a lower edge of said diaphragm.  
     
     
         20 . The cushion according to  claim 19 , characterized in that said diaphragm has a tapered section near the upper edge.  
     
     
         21 . The cushion according to  claim 19 , characterized in that the diaphragm has a gradually tapered section.  
     
     
         22 . A cushion with thin and vertical diaphragms to be buckled when pressed arranged in a lattice, characterized in that said diaphragm is made of elastomer and contains lubricant of 0.3 to 10 parts by weight with respect to said elastomer of 100 parts by weight.  
     
     
         23 . The cushion according to  claim 22 , characterized in that the lubricant is fatty acid based lubricant.  
     
     
         24 . The cushion according to  claim 22 , characterized in that the elastomer forming the diaphragm further contains filler.  
     
     
         25 . The cushion according to  claim 23 , characterized in that the elastomer forming the diaphragm further contains filler  
     
     
         26 . The cushion according to  claim 22 , characterized in that the elastomer forming the diaphragm contains a filler, and is low expansion elastomer with an expansion ratio of 1.01 to 2.  
     
     
         27 . The cushion according to  claim 23 , characterized in that the elastomer forming the diaphragm contains a filler, and is low expansion elastomer with an expansion ratio of 1.01 to 2.  
     
     
         28 . The cushion according to  claim 22 , characterized in that the elastomer forming the diaphragm is polystyrene based elastomer.  
     
     
         29 . The cushion according to  claim 22 , characterized in that the elastomer forming the diaphragm is elastomer into which acrylic soft resin is mixed.  
     
     
         30 . The cushion according to  claim 22 , characterized in that powder is attached to the elastomer forming the diaphragm.