Background of the Invention
The present invention relates to child restraint seats. Such seats are most widely known in use with automobiles. However, the present invention is also applicable to vehicles generally, such as busses, planes, trains and boats for example, and to theater seating and the like.
In typical use in automobiles for example, a child restraint seat is a bulky, rigid apparatus into which a child is strapped and which is fastened in a seating position in a car. Because the devices are bulky and are bothersome to remove and replace, child restraint seats are typically left in place in the car for the child's use. Only when circumstances necessitate the use of the seating position by an adult is the child seat generally removed from the car. Child restraint seats are thus seen as somewhat of a necessary nuisance, typically reserved for use in cars and seldom used in other types of vehicles or with other types of seating. While social acceptance and legislative requirements for the use of child restraint seats in cars is somewhat commonplace, there is also social and legislative interest in requiring their use in other vehicles, including busses, planes and trains.
While the desirability of an adult seat which is convertible to a child restraint seat is apparent, attempts to supply this need have had their own limitations and problems. U.S. Pat. No. 4,749,229 issued to Dorto on June 7, 1988, for example, discloses a device which inherently limits its utility by creating an overhead obstruction to a child who uses the seat. This requires the child to be of sufficiently small size to sit within a recessed area in the back of an adult seat. Other devices, such as are disclosed in U.S. Pat. No. 4,664,443, issued to Casale on May 12, 1987, for example, are impractical because they require an excessive volume of space.
Summary of the Invention
The present invention addresses these problems with a practical convertible seating unit for accommodating an adult in a seating position and having an integral child restraint seat stored within the back of the adult seat. A child seat of the present invention includes two portions of the adult seat back which pivot forward to form a child seat cushion and a restraint bar and which pivot closed to form a smooth back support for an adult seating position.
In one aspect of the invention, the restraint bar portion generally resembles an inverted U in the closed position with a bight portion positioned to form the top edge of the adult seat back. Thus, a height restricting portion of the back does not remain when the child seat is deployed. The child seat cushion portion folds into a closed position to nest inside the closed restraint bar portion and forms the mid and lower back support for the adult seating position.
In another aspect of the invention, the child restraint bar and seat cushion are mounted to a framework such that the seat cushion can be moved forwardly, inclining the child seat back and providing a reclined seating position for the child.
In another aspect of the invention, a removable top cushion is used between the closed restraint bar and the top edge of the adult seat back when a high back adult seat style is used or when extending the restraint bar to be flush with the top edge of the adult seat back is impractical.
These and other objects, advantages and features of the present invention will become apparent upon review of the following specification in conjunction with the drawings.
Brief Description of the Drawings
FIG. 1 is a perspective view of a seat according to the invention in the closed position:
FIG. 2 is a perspective view of the seat of FIG. 1 in the open position with structural framework shown in phantom;
FIG. 3 is a side sectional view of the seat of FIG. 2;
FIG. 4 is a perspective view of the structural framework of FIG. 2;
FIG. 5 is a sectional view along plane V--V of FIG. 3; and
FIG. 6 is a sectional view along plane VI--VI of FIG. 3.
FIG. 7 is a perspective view of an alternative embodiment of a seat according to the invention in the open position.
FIG. 8 is a perspective view of the seat of FIG. 7 in the closed position.
FIG. 9 is a fragmentary detail of the top of the seat of FIG. 8.
Description of the Preferred Embodiment
Referring to the drawings in greater detail, a seating unit 10 of the present invention has a child restraint bar 20 and a child seat cushion 30 which are mounted with a frame 40 for folding into a closed position to become a part of an adult seat back 11 (FIGS. 1, 2 and 3).
Restraint bar 20 is a generally U-shaped member having legs 23. Bar 20 is built-up with safety padding and upholstery (FIGS. 1 and 2). A wedge portion 21 on bar 20 is built-up with an extra thickness of padding to provide added safety to a child by presenting a larger surface area and a deeper padding in an area where a child might contact the bar in a sudden stop or accident. Bar 20 is pivotally fastened to frame 40 at pivots 25 (FIG. 3), near the ends of legs 23. Bar 20 can pivot between an open horizontal position (FIG. 2) and a closed or stored vertical position (FIG. 1). In the open position, bar 20 surrounds a child using seating unit 10, restraining the child. The restraining properties of bar 20 are preferably supplemented by a typical child restraint harness (not shown). In the closed position bar 20 is folded into back 11 with an edge surface 27 below the top surface 13 of back 11, and a face surface 29 of bar 20 flush with a face surface 15 of back 11.
In such a construction of a high back style seat and the like, where bar 20 cannot practically extend so that edge surface 27 is flush with top surface 13 of back 11, a top cushion 70 is provided (FIGS. 1, 2 and 3). Cushion 70 fills an area 71 near the top of seat back 11, above stored bar 20 to provide a flush face surface 15 when seating unit 10 is stored and an esthetically pleasing flush top surface 13. Cushion 70 comprises a front portion 72 and a rear portion 74 connected to form a T-shaped top cushion 70. Cushion 70 is preferrably attached to back 11 by a hinge connection. The hinge connection between cushion 70 and back 11 may simply comprise a strip of fabric 76 extending between the cushion and the back as shown (FIG. 2). When unit 10 is opened for use, cushion 70 is simply flipped over the top of back 11 so that the use of the child seat is not hindered by a restricting overhead structure.
Child seat cushion 30 also pivots between an open horizontal position (FIG. 2) and a closed vertical position (FIG. 1). Cushion 30 is pivotally attached at each side, near its lower edge 31, to frame 40 at pivots 35 (FIG. 3). A framing plate 33 is built into each side of cushion 30 near edge 31. Plates 33 pivot with cushion 30 and provide a foundation for pivotally connecting the cushion to frame 40.
Frame 40 has two vertical side braces 41 which are pivotally connected, near their upper end 43, to back 11 by vertical sliding tracks 50 (FIG. 5) so that the lower ends 45 of braces 41 can pivot away from back 11 and upper ends 43 of braces 41 can slide down the tracks 50. Tracks 50 are elongated channels having a "C" cross-section for retaining a slide, preferably a wheel 51, which in turn is pivotally connected to upper end 43 of side brace 41 by a stub axle 53.
Lower ends 45 of braces 41 are pivotally connected at pivots 35 to one end of telescoping rods 60. An inner "C"-channel 61 is retained within an outer "C"-channel 63 (FIG. 6). Channel 61 slides within channel 63 to provide a telescoping action. Each channel 61 is pivotally connected at one end 65 to a plate 33 (FIG. 4). The opposing end 67 of each channel 63 is pivotally anchored in back 11. A child seat back foundation 37 extends between braces 41. Foundation 37 is located in a recess behind bar 20 and cushion 30. Further, foundation 37 is preferably made from a sheet of 16 gauge steel which is bent to form a two inch deep, open ended basket behind braces 41. Foundation 37 is preferably welded along each side to braces 41.
An alternative seat 110 which is very similar to the seat of FIGS. 1-6 as shown in FIGS. 7-9. Seat 110 includes a back 111 which can pivot backwardly to the position as disclosed by phantom lines "A" such as in a bus or airplane. In many such cases it is not necessary that a separate back support be pivoted independently of the back of the seat. Therefore, in FIGS. 7, 8 and 9, a separate, independently pivotable back support is not provided, merely an upholstered recessed area 119, formed in the back 111. In this modification, stationary frame members (not shown) similar to side frame members 41 of FIG. 4, are mounted in the back 111 on each side of the recess 119 and the cushion 130 and restraint bar 120 are pivotally mounted on this frame. In this construction, cushion 130 and restraint bar 120 are adapted to be pivoted upwardly or downwardly as disclosed in FIGS. 7 and 8, respectively. The inclination of the recessed back support is provided by the incline of the entire seat back 111. In order to accommodate larger children, a cushion 170 of essentially the same shape and construction of cushion 70 is pivotally mounted at the top edge of the seat by hinge 176 in a manner similar to that previously described in relation to cushion 70 of FIGS. 1-6. Cushion 170 is adapted to fill the void 171 or be flipped over the top of back 111 as disclosed in FIG. 7.
It should be understood that an extremely high back seat of this type may also include an independent pivotable back as disclosed in FIGS. 1-6 to provide independent tilting of a back support in addition to the tilting of the entire seat back 111.
Operation
In operation of the seat 10 of FIGS. 1-6, seating unit 10 is opened by pivoting cushion 30 forward about edge 31 until cushion 30 is in a horizontal position, laying on adult seat 17. Since cushion 30 and seat 17 are each fabricated from compliant upholstery material, each "gives" to allow cushion 30 to pivot forward to the open position. Restraint bar 20 is likewise opened by pivoting forward about pivots 25 until bar 20 is cantilevered forward in a horizontal position.
Cushion 70 is simply flipped over the top of back 11 (FIGS. 1, 2 and 3). An upholstered recessed area 19 is revealed in back 11 when bar 20 and cushion 30 are opened and forms the back for the child seat.
Cushion 30 is pulled forward and rods 60 telescope to adjust the incline of the child seat back. A child is placed between legs 23 of bar 20 to sit upon cushion 30. The child is preferably strapped into seat 10 with a typical child restraint harness (not shown).
In the operation of the seat 110 of FIGS. 7-9, the seating unit is opened by pivoting cushion 130 forward until cushion 130 is in a horizontal position as disclosed in FIG. 7. Restraint bar 120 is likewise opened by pivoting forward until bar 120 is cantilevered forward in a horizontal position as disclosed in FIG. 7.
The cushion 170 is then simply flipped over the top of the back 111. In the open position, as disclosed in FIG. 7, the cushion 130, restraint bar 120 and cushion 170 provide an upholstered recess area 119 in the back 111. The incline of the back can then be adjusted as is well known in the art of bus and airplane seats and the like.
While a preferred form of the invention has been shown and described, other forms will now be apparent to those skilled in the art. Therefore, it will be understood that the embodiments shown in the drawings and described above are merely for illustrative purposes, and are not intended to limit the scope of the invention which is defined by the claims which follow.