US20100156164A1 - Multiple part resin seat back with integrated adjustable headrest support - Google Patents
Multiple part resin seat back with integrated adjustable headrest support Download PDFInfo
- Publication number
- US20100156164A1 US20100156164A1 US12/341,692 US34169208A US2010156164A1 US 20100156164 A1 US20100156164 A1 US 20100156164A1 US 34169208 A US34169208 A US 34169208A US 2010156164 A1 US2010156164 A1 US 2010156164A1
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- United States
- Prior art keywords
- panel
- seat back
- joining
- seat
- raised portion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/68—Seat frames
- B60N2/686—Panel like structures
Abstract
Description
- The present invention is related to a seat back support. In particular, the present invention is related to a seat back support made from multiple parts and having an integral adjustable headrest support.
- Seats for individuals to sit in come in a wide variety of shapes and materials. Typically, a seat will have a seat bottom and a seat back, the seat bottom being the component upon which a person will sit and the seat back providing support for the person's back.
- Motor vehicles such as automobiles, trucks, tractors and the like typically have seats with seat bottoms and seat backs with some of the seats operable for the seat back to tilt in a forward and rearward direction. In addition, some seats for motor vehicles are known as 60/40 seats, such a seat typically made from two major sections. One of the sections includes a seating structure for an individual to sit on, along with an adjoining side section that can be used to attach an armrest, or in the alternative, store the armrest in an upright position and provide a seating region for an additional passenger. Such a seating portion is known as the 60 part of the 60/40 seat. The 40 part is simply a single passenger seat.
- With the increase of fuel costs and the corresponding desire for increased fuel efficiency, motor vehicles are developed with reduced weight as a goal. However, all of the components of the vehicles, including seat structures, are required to meet Federal Safety Standards. One method of making a seat that is both lightweight and meets appropriate safety standards is to use a polymer as a material of construction fabrication. For example, heretofor seat structures have been made from blow molding of a polymer in order to produce a low cost plastic molding structure having relatively light weight when compared to other materials such as steel, aluminum and the like. For example, U.S. Pat. No. 4,390,209 discloses a plastic seat back frame work and a method of manufacture. Likewise, U.S. Pat. No. 5,253,924 discloses a blow molded seat back with a reinforcing member.
- Although lightweight and sufficiently strong seat structures have been provided using blow molding, this method has its limitations. For example, a blow molded component must have a generally uniform thickness throughout the part, the control of the thickness can be less than desirable and the complexity of the component can be limited. As such, seat back supports have been limited to relatively simple shapes that have excess material, excess weight and limited integral attachment features. In addition, blow molded seat back supports have required that steel plates be attached thereto in order for a component such as an armrest and/or an adjustable headrest support structure to be attached thereto.
- In light of these limitations, a seat back support having sufficient strength and toughness to meet Federal Safety Standards, and yet be lightweight and incorporate integral attachment structures would be desirable. In addition, a process for making such a seat back structure would also be desirable.
- A seat back support for seat cushioning to be attached thereto and provide a seat component is disclosed. In addition, a process for making the seat back support is also disclosed. The seat back support can have a first panel with a base portion and a raised portion extending outwardly from the base portion. In addition, at least part of the raised portion will have been melted and re-solidified. The seat back support can also include a second panel that has a corrugated structure with a joining surface and a channel portion extending from the joining surface.
- The second panel is fixedly attached to the first panel when the melted raised portion is in contact with the joining surface of the second panel and has re-solidified, thereby forming a bond the first and second panels. In some instances, the first panel and/or the second panel can have an outer lip that is also at least partially joined to the opposite panel. Both the raised portion and the outer lip afford for the fixedly attaching of the first panel to the second panel without the use of additional material.
- The raised portion can have a joining material portion extending outwardly therefrom, the joining material portion being the melted raised portion that has re-solidified and is in contact with the joining surface of the second panel. The raised portion can be a rib that extends outwardly from the base portion and the joining material portion can be a bead of joining material extending along the rib.
- The second panel with the corrugated structure can have a plurality of alternating joining surfaces and channel portions. The plurality of channel portions can have contoured outer surfaces that are dimensioned to generally fit an individual's back that would be sitting against the seat back support. In addition, the second panel can have a first portion with a first thickness and a second portion with a second thickness. The first thickness and the second thickness can be different, and in some instances, the first thickness can be greater than the second thickness by more than 20%, while in other instances greater than 30%. In still other instances, the first thickness can be greater than the second thickness by more than 40%.
- The seat back support can have an integral attachment structure, for example an integral adjustable headrest support portion, an integral arm rest attachment bracket and/or an integral seat back pivot bracket. It is appreciated that the seat back support and any integral attachment structures meet all Federal Safety regulations.
- A process for making the seat back support can include providing a first panel having a base portion and a raised portion extending outwardly from the base portion. In addition, a second panel is provided, the second panel having a corrugated structure with alternating joining surfaces and channel portions extending from the joining surfaces. The first panel is placed adjacent to the second panel such that the raised portion of the first panel is in contact with at least one of the joining surfaces of the second panel. The first panel is joined to the second panel by melting at least part of the raised portion while it is in contact with at least one of the joining surfaces, the melted material bonding to the joining surface and fixedly attaching the first panel to the second panel. The raised portion of the first panel can also have a bead of joining material extending outwardly therefrom, the bead of joining material being the melted raised portion that re-solidifies and bonds the first panel to the second panel.
- The second panel can include an integral attachment component as described above and can also include a first portion with a first thickness and a second portion with a second thickness. The first panel and the second panel can be made by a thin wall molding process, where thin wall is defined as equal to or less than 2.0 millimeters. In some instances, the first panel and the second panel can be made by injection molding and in other instances made by injection compression molding. The raised portion of the first panel can be melted by rapid displacement of the first panel relative to the second panel, for example through the use of vibration welding, ultrasonic welding, and the like. In addition, hot plate melting can be used to melt at least part of the raised portion.
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FIG. 1 is a perspective view of an assembled seat back; -
FIG. 2 is an exploded perspective view of a seat back support for an embodiment of the present invention; -
FIG. 3 is a cross-sectional view of the section 3-3 shown inFIG. 2 ; and -
FIG. 4 is a cross-sectional view of the section 4-4 shown inFIG. 2 wherein a raised portion of a first panel is in contact with a joining surface of a second panel. - The present invention discloses a seat back support that can have seat cushions attached thereto and thereby provide a seat component. Therefore, the present invention has utility as a seat component and as a process for making the seat component.
- The seat back support can include a first panel attached to a second panel without the use of any additional material. For the purposes of the present invention, the term “additional material” refers to material such as adhesives, fasteners and the like. As such, the first panel is attached to the second panel using only material that constitutes the first panel and/or the second panel. One of the panels, for example the second panel can include an integral attachment component, for example and for illustrative purposes only, an integral adjustable headrest support portion, an integral arm rest attachment bracket, an integral seat back pivot bracket and the like.
- The first panel can have a base portion and a raised portion extending outwardly from the base portion. At least part of the raised portion of the seat back support has been melted and re-solidified. The second panel can have a corrugated structure with a joining surface and a channel portion extending from the joining surface. The raised portion of the first panel that has been melted is in contact with the joining surface of the second panel during the melting, the re-solidification of the melted material forming a bond therebetween and resulting in the second panel being fixedly attached to the first panel.
- The first and/or second panel can also have an outer lip, the outer lip affording for additional joining surfaces between the two panels. In some instances, the raised portion and/or a portion of the outer lip can be melted by rapid displacement of the first panel relative to the second panel, for example by vibration welding, ultrasonic welding, and the like. In the alternative, the melting of the raised portion and/or outer lip can be accomplished by hot plate melting. It is appreciated that other methods, techniques, etc., can be used to melt a volume of the raised portion that is proximate to and/or in contact with the joining surface.
- The raised portion can also have a joining material portion that extends outwardly therefrom, the joining material portion being in the form of a bead, a button, and the like. The joining material can be melted and re-solidified while it is in contact with the joining surface of the second panel and thereby provide a bond between the raised portion of the first panel and the joining surface of the second panel. The raised portion can be a rib extending outwardly from the base portion, or in the alternative a plurality of button shaped structures extending outwardly from the base portion. The corrugated structure of the second panel can include a plurality of alternating joining surfaces and channel portions that extend outwardly from the joining surfaces.
- The channel portions can have contoured outer surfaces, the contour being dimensioned to generally fit an individual's back that would be, or is, pressed against the seat back support. In addition, the channel portions can have a dimension that affords for the use of less foam material typically provided to produce a seat. Stated differently, heretofore seat back supports have been relatively thin and thus require relatively thick amounts of foam material to be attached thereto. However, the seat back support disclosed herein provides sufficient thickness such that less foam material is required when compared to heretofore seat assemblies. It is appreciated that the seat back support disclosed herein, having the first panel fixedly attached to a second panel without the use of additional material meets appropriate safety standards such as Federal Motor Vehicle safety Standards (FMVSS) 202a, 207 and Economic Commission for Europe (ECE) 17.
- The second panel can have a variety of channels, ribs, indentations, and the like in order to provide appropriate structural strength, ductility, toughness, desired shape, etc. The first panel and/or the second panel can be made from resin, thermoplastic polymers such as polypropylene and/or polypropylene ethylene, and the like. In some instances, the polymer can be mixed with glass, talc and other type materials that give additional strength properties that are desired.
- As stated above, the second panel can include an integral adjustable headrest support portion, the integral adjustable headrest support portion having at least two hollow channels dimensioned to accept an adjustable headrest grommet. In some instances, the second panel can have two integral adjustable headrest support portions, each of the headrest support portions having at least two hollow channels dimensioned to accept an adjustable headrest grommet.
- A process for making a seat back support for seat cushioning to be attached thereto and thus provide a seat component can include providing a first panel having a base portion and a raised portion extending outwardly from the base portion. In addition, a second panel having a corrugated structure can be provided, the corrugated structure having alternating joining surfaces and channel portions extending from the joining surfaces. The first panel and the second panel can be made from a thin wall molding process where thin wall is defined for the purposes of the present invention as being equal to or less than 2.0 millimeters. In some instances first panel and/or the second panel can be made by injection molding, while in other instances injection compression molding. The first panel can be placed adjacent to and in contact with the second panel such that the raised portion of the first panel is in contact with at least one of the joining surfaces. Joining of the first panel to the second panel is accomplished by melting at least part of the raised portion while it is in contact with the joining surfaces, the melted portion re-solidifying and providing a bond between the raised portion of the first panel and the joining surface of the second panel. In this manner, the first panel is fixedly attached to the second panel. In some instances, the raised portion can have a bead of joining material extending outwardly therefrom, the bead of joining material being the melted raised portion that re-solidifies during the joining of the first panel to the second panel.
- Turning now to
FIG. 1 , a seat back assembly is shown generally atreference numeral 10. The seat backassembly 10 can include a seat back 20, a firstadjustable headrest 30, a secondadjustable headrest 40 and anarm rest 50. It is appreciated that thearm rest 50 is in an upright position and affords for a seat back for an individual. It is further appreciated that the seat back assembly 10 shown inFIG. 1 illustrates that foam material is attached to interior support structures that are not shown. - Turning now to
FIG. 2 , a perspective view of a seat backsupport 100 is shown. It is appreciated that such a seat back support structure could be located within the seat back assembly 10 with cushion material attached thereto. The seat backsupport 100 can include afirst panel 120 and asecond panel 140. Thefirst panel 120 can include abase portion 122 and a raisedportion 124 extending therefrom. It is appreciated that the raisedportion 124 can include a plurality of ribs that extend from thebase portion 122. In the alternative, the raisedportion 124 could be one continuous rib or a plurality of button shaped raised regions. As such, the exact structure of the raisedportion 124 is not critical so long as it provides for a surface to contact a joining surface to be described in more detail below. - The raised
portion 124 can have a joiningmaterial portion 126 that extends outwardly therefrom. In addition, thefirst panel 120 can have one ormore channel portions 128 that extend from thebase portion 122 in order to provide desired components, such as lock and latch hub covers and the like. Thefirst panel 120 can optionally include one ormore apertures 130 that afford for fasteners to be located therethrough. In the alternative, location pins can be placed at least partially through theapertures 130 in order to afford accurate location and proper placement of the seat back within a vehicle. Thefirst panel 120 can also include anouter lip 132 and one ormore tabs 134 and/orindentations 136. It is appreciated that thetabs 134 and/or theindentations 136 can be used for the attachment of trim material, foam material, and the like. In addition, an armrest support surface 138 can be included as part of thefirst panel 120. - The
second panel 140 can have a corrugated structure as shown inFIG. 2 with alternatingchannel portions 150 extending from joining surfaces to be described below. Stated differently, thesecond panel 140 can have a plurality of alternating channels and cavities that provide overall thickness and structural support to thesecond panel 140. Thechannel portions 150 include aside wall 152 and achannel surface 154 that extends between a pair ofadjacent side walls 152. Additional structural features that provide support can be included, for example interconnectingchannel portions 158. - The side walls can extend upwardly from a
bottom surface 156 of the cavity regions and thereby provide the corrugated structure. In addition to thechannel portions 150 providing an overall thickness to the seat backsupport 100, thechannel portions 150 can be contoured in order to fit the general shape of an individual's back seated adjacent thereto. For example, thechannel surface 154 can have abottom end 151 and atop end 153. Between thebottom end 151 and thetop end 153 can be a concave curvature alongline 157 that can be dimensioned to fit a curvature of an individual's back. In addition, thesecond panel 140 can have a generally concave contour alongline 159 which can be dimensioned to generally fit contour of an individual's back in a lateral direction. - Other features can be included within the
second panel 140, for example an integraladjustable headrest support 160, an integralarmrest attachment portion 170 and an integralarmrest storage portion 180. Theadjustable headrest portion 160 is integral with the remainder of thesecond panel 140 and can include at least twohollow channels 162 that are dimensioned to accept a grommet for an adjustable headrest (not shown). The integral armrest attachment portion 170 can include abracket 172 with anaperture 174. It is appreciated that thebracket 172 extends outwardly from abase portion 176 of thesecond panel 140. It is further appreciated that a pair of arm restsbrackets 172 can extend from thebase portion 176. Thebase portion 176 can have one ormore apertures 177 that can align with alignment pins (not shown) extending from thearm rest portion 138 of thefirst panel 120. In the alternative, theapertures 177 can afford for an additional plate or other structure to be attached to the seat backsupport 100. For example and for illustrative purposes only, thesecond panel 140 can be provided without thearmrest bracket 172 extending therefrom, and a steel plate with brackets can be attached to thebase portion 176. In addition to the integral adjustableheadrest support portion 160 and/or the armrest support portion 170, the armrest storage section 180 can be dimensioned such that the arm rest can be stored in that location when in the upright position. In addition, seat backpivot brackets 182 can be included withapertures 184, thebrackets 182 withapertures 184 affording for the seat backsupport 100 to be pivotally attached to a seat bottom and provide pivotal movement of the seat backassembly 10. - Turning now to
FIGS. 3 and 4 , a cross-sectional view of the sections 3-3 and 4-4 shown inFIG. 2 , respectively, are illustrated. Thefirst panel 120 has thebase portion 122 with the raisedportion 124 extending outwardly therefrom. In addition, the optional joiningmaterial portion 126 can extend outwardly from the raisedportion 124. It is clear fromFIGS. 3 and 4 that the raisedportion 124 and/or the joiningmaterial portion 126 can come into contact with a joiningsurface 142 of thesecond panel 140. The joiningsurface 142 is interrupted by thechannel portions 150 extending therefrom. Thechannel portions 150, as stated above, haveside walls 152 extending between the joiningsurfaces 142 and thechannel surface 154. In this manner, a corrugated structure is provided. - Looking specifically at
FIG. 4 , at least a portion of the raisedportion 124 and/or joiningmaterial portion 126 has been melted and re-solidified while in contact with the joiningsurface 142. It is known to those skilled in the art, that the melting and re-solidification of the raisedportion 124 and/or the joiningmaterial portion 126 while in contact with the joiningsurface 142 can provide a structural bond there between. Likewise, theouter lip 132 of thefirst panel 120 and an outer lip of the second panel 140 (not shown) can be brought into contact with each other and have at least part of one or both lips melted and re-solidified and thus provide additional bonding surfaces for fixedly attaching thefirst panel 120 to thesecond panel 140. - The process for manufacturing the seat back
support 100 can include providing thefirst panel 120 and thesecond panel 140. Thefirst panel 120 and/or thesecond panel 140 can be made by any thin wall molding process, for example and for illustrative purposes only injection molding and injection compression molding. It is appreciated that other manufacturing techniques can be used to provide thefirst panel 120 and/or thesecond panel 140 having desirable structural features. - The
first panel 120 can be produced or manufactured such that the raisedregion 124 extends outwardly from thebase portion 120. In addition, the joiningmaterial portion 126 can be included such that it extends outwardly from the raisedportion 124. Likewise, thesecond panel 140 can be manufactured such that it has the corrugated structure as illustrated in the figures withchannel portions 150 extending from joiningsurfaces 142. - After the
first panel 120 andsecond panel 140 have been provided, they can be placed adjacent to each other such that the raisedportion 124 and/or the joiningmaterial portion 126 of the first panel is in contact with the joiningsurface 142 of the second panel. After proper alignment of the two panels relative to each other, at least a portion of the raisedportion 124 and/or the joiningmaterial portion 126 is melted and allowed to re-solidify while in contact with the joiningsurface 142. In this manner, the raisedportion 124 can be bonded to the joiningsurface 142. - It is appreciated that the melting of the raised
portion 124 and/or the joiningmaterial portion 126 can be accomplished by vibration welding, ultrasonic welding, hot plate melting and the like. It is further appreciated that the vibration welding and/or the ultrasonic welding results in rapid displacement of thefirst panel 120 relative to thesecond panel 140. In addition, pressure can be applied to thefirst panel 120 and thesecond panel 140 such that contact between the raisedportion 124 and/or the joiningmaterial portion 126 is maintained with the joiningsurface 142 during the joining process. - After the
first panel 120 has been fixedly attached to thesecond panel 140, foam material, cushioning and the like can be attached to the seat backsupport 100 in order to provide the seat backassembly 10. In addition, the firstadjustable headrest 30 and the secondadjustable headrest 40 can be attached using the integral adjustableheadrest support portions 160. Likewise, thearm rest 50 can be attached to theseat assembly 10 using the armrest attachment brackets 172. In this manner, a seat backsupport 100 can be provided with thefirst panel 120 fixedly attached to thesecond panel 140 without the use of additional material. - The embodiments have been described for illustrative purposes only and are not meant to limit the scope of the invention in any way. Modifications, adjustments, different structural shapes, different attachment features and the like will be obvious to those skilled in the art and are within the scope of the invention. As such, the description of the invention is for teaching purposes and the scope of the invention is limited by the claims.
Claims (33)
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US11059404B2 (en) * | 2017-03-23 | 2021-07-13 | Ts Tech Co., Ltd. | Reinforcement structure for seat back frame |
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JP2019188872A (en) * | 2018-04-19 | 2019-10-31 | 日本発條株式会社 | Seat for vehicle |
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