Abstract:
The present invention relates to a foldable stroller with separable infant carrier, comprising a foldable stroller, a front protect frame slidably connected with the stroller and a infant carrier which can be either a safety seat or a seat of a stroller. The front protect frame changes in accordance with the changing of positions of stroller from using, unfolded, to parking, folded, and is mounted by the infant carrier for fixing position when the stroller is on using position.

Description:
FIELD OF THE INVENTION 
     The present invention relates generally to a foldable infant stroller. More particularly, the present invention relates to a foldable infant stroller which is foldable in both front and side directions and can be mounted thereon a portable safety seat. 
     DESCRIPTION OF RELATED ART 
     There are various kinds of infant strollers in the present market. A foldable infant stroller made to decrease the occupying volume while not in use is one of them. Strollers of this kind are the most ones. They can be divided into some categories such as the following: Strollers which are complicated in structure but comfortable while using are illustrated in U.S. Pat. No. 5,876,057 and U.S. Pat. No. 5,845,924. Strollers which are simple in structure but foldable for downsizing after using and being easily portable are illustrated in U.S. Pat. No. 5,845,925 and U.S. Pat. No. 5,863,061. Foldable strollers such as those described in U.S. Pat. No. 5,876,057 and U.S. Pat. No. 5,845,924 are complicated in structure. The main structure comprises a pair of front frames, a pair of rear frames, a grasp frames and a seat frame, wherein the seat frame is located between the front and rear frames. The grasp frame and the rear frames are folded and then moved closer to the front frames when folding the stroller. That is, the infant stroller is collapsible in the side direction by getting the front and rear frames closer but can not be downsized in the front direction by getting both front and both rear frames closer, because the seat frame is constructed between them. Foldable strollers such as those described in U.S. Pat. No. 5,845,925 and U.S. Pat. No. 5,863,061 are comparatively simple in structure. The main structure comprises a pair of front frames, a pair of rear frames, a pair of grasp frames and a pair of seat frames, wherein the seat is formed by directly putting a cloth between the front and rear frames. Both front frames and rear frames are collapsible in both front direction and side direction for further downsizing. Thus, this kind of stroller is simpler and lighter and easy to carry out, which is generally called the umbrella stroller. 
     In many countries, the infant is obliged to seated in an auxiliary safety seat while transporting it by automobiles under some regulations. The adult must take an auxiliary safety seat for transporting the baby and a stroller for walking the baby around after arrival. In the case of taking a public transportation, for example a bus, it becomes more annoying that the adult must put the infant readily on the stroller first, push the stroller with one hand and then carry the auxiliary safety seat with another hand. Therefore, to carry both the auxiliary safety seat and the stroller is commonly encountered. Most of the parents choose an umbrella stroller with small and light characteristics to lessen their carrying burdens. 
     Referring to U.S. Pat. No. 5,823,547, for example, it disclosed a child safety seat, which comprises a seat provided for carrying a child having a seat belt on it and a foldable wheeled member connected under the seat provided for staying on one position to facilitate using as a child safety seat and another position to facilitate using as a stroller. With these elements, this child a safety seat combines the functions of both safety seat and a stroller together in order to solve the aforementioned annoying carrying problems. Unfortunately, this child safety seat only combined both safety seat and stroller functions, but did not allow simultaneous use of both functions impossible. Furthermore, the seat element of it is not foldable, which may not be suitable for a parent who only needs only one stroller that is both small and light-weight. 
     Referring to U.S. Pat. No. 5,727,798, it disclosed a child stroller and infant carrier system, which comprises a front safety rod on which an infant carrier separably placed from it. However, this foldable stroller is still complicated in structure. When the functions of both stroller and infant carrier are needed simultaneously, this kind of structure is not suitable anymore. Accordingly, the umbrella stroller disclosed in U.S. Pat. No. 5,845,925 and U.S. Pat. No. 5,863,061, both have a pair of front and rear frames which can mutually moving close to each other as viewed from front face. This causes the fixed front safety rod, usually in the shape of ‘U’, unable to be mounted on the stroller and, thus, making them useful only as stroller and safety seat individually. 
     The foregoing has outlined some of the more pertinent objects of the present invention. These objects should be construed to be merely illustrative of some of the more prominent features and applications of the intended invention. Many other beneficial results can be obtained by applying the present invention so disclosed in a different manner or modifying the invention within the scope of the disclosure. Accordingly, other objects and a fuller understanding of the invention may be had by referring to the summary of the invention and detailed description of the preferred embodiment in addition to the scope of the invention as defined by the claims taken in conjunction with the accompanying drawings. 
     SUMMARY OF THE INVENTION 
     Accordingly, the present invention provides mainly a front protect structure of infant stroller, especially, a front protect structure which can change to both the use position and the parking position according to the change of the use position of the infant stroller. 
     In order to meet the object of the present invention, which comprising: a front protect structure connected to both front frames. The front protect structure further comprises a pair of handrails, a pair of supporting frames and a connecting rod, wherein the connecting rods are movably connected between these two supporting rods. When the stroller is folded from left to right, or from right to left, the supporting rods slide along the connecting rods connecting with and get closer to each other. Similarly, when the stroller is unfolded from left to right, or from right to left, the supporting rods slide along the connecting rods connecting with and leave from each other, and the connecting rod is connected to the supporting rods to form the front protect frame of the stroller. 
     Another object of the present invention is to provide a stroller structure which can be mounted with a automobile safety seat thereon and thus providing the dual functions of automobile safety seat and stroller. The stroller has a front protect frame provided for the alternative mounting of the automobile safety seat. Infants are put on safety seat when they are transported by vehicle and are still keep on the safety seat by putting the safety seat directly on the stroller. The stroller is still the moving vehicle of carrying the infant. Therefore, parents can choose a stroller having simple structure to accompany with a safety seat when going outside. The stroller and the safety seat unquestionably can also be use individually. 
     The foregoing has outlined rather broadly the more pertinent and important features of the present invention in order that the detailed description of the invention that follows may be better understood so that the contribution of the present invention to the art can be more fully appreciated. Additional features of the invention will be described hereinafter which form the subject of the claims of the invention. It should be appreciated by those skilled in the art that the conception and the disclosed specific embodiment may be readily utilized as a basis for modifying or designing other structures for carrying out the same purpose of the present invention. It should also be realized by those skilled in the art that such equivalent methods and structures do not depart from the spirit and scope of the invention as set forth in the appended claims. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a side view of the embodiment of the present invention. 
     FIG. 2 is an enlarged perspective view of the front frame structure of the present invention. 
     FIG. 3 is an exploded perspective view of the front frame structure of the present invention. 
     FIG. 4 is an enlarged perspective view of the front frame structure of the present invention, depicting the folded status. 
     FIG. 5A is an exploded side view of the automobile safety seat and the stroller of the present invention. 
     FIG. 5B is an enlarged cutting view of a portion of the automobile safety seat and the stroller of the present invention. 
     FIG. 6A is a side view of the automobile safety seat and the stroller of the present invention, depicting the composing status. 
     FIG. 6B is a cutting view of a portion of the automobile safety seat and the stroller of the present invention, depicting the composing status. 
     FIG. 7A is a side view of another embodiment of the present invention. 
     FIG. 7B is a side view of FIG. 7A, depicting the composing status. 
     FIG. 8 is a perspective view of the front frame structure of another embodiment of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Embodiments of the present invention provide a stroller structure which can be folded from both front face and lateral face. 
     Firstly, referring to FIG. 1 which is a side view of the present invention comprising a pair of front frames  11 , a pair of rear frames  12 , a pair of seat frames  13  and a pair of grasp frames  14 . 
     The front frame  11  has a wheel  15  connected under its bottom and a grasp frame  14  connected at its end. The grasp frame  14  pivotally connects to a pivot member  141  which, in turn, connects to the rear frame  12 . The rear frame  12  also has a wheel  15 ′ connected under its bottom. The seat frame  13  is connected between the front frame  11  and rear frame  12 . Two grasp frames  14  and two rear frames  12  are connected by two connecting rods  16  and  16 ′ which are pivotally interconnected in their intermediate portions. An infant seat, not shown in the fig., is formed by putting a piece of cloth coating on between front and rear frames  11 ,  12  and seat frame  13 . The stroller  1  can change between the using position, unfolded status, and the parking position, folded status. In the parking position, the front frame  11  and the rear frame  12  come closer laterally and come from left to right, or right to left, as viewed from the front face. 
     Referring to FIGS. 2,  3  and  4 , the present invention further comprises a front protect frame  18  which is connected between the front frame  11  and the rear frame  12 . The front protect frame  18  comprises a pair of handrail frames  181 , a pair of supporting frames  182  and a connecting rod  183 . The supporting frame  182  pivotally connects to the pivot of the front frame  11  and the seat frame  13  at one end. The handrail frame  181  pivotally connects to the rear frame  12  near the grasp frame  14  at one end and to supporting frame  182  at the other end. The supporting frame  182  has a connecting portion  1821  having a hollow space  1822  and an open end  1823 . When two supporting frames  182  are connected to the front frame  11  separately, these two open ends  1823  of the hollow space  1822  are toward to each other. The connecting rod  183  is located between these two supporting frames  182  and has its two ends slidably inserted into the open ends  1823  of these two supporting frames  182 . When the front frames  11  and the rear frames  12  of the stroller  1  come closer to their parking position, they become closer to each other, the supporting frames  182  also become closer to each other, and the connecting rod  183  slides into the hollow space  1822  more and more. In the same manner, when the front frames  11  and the rear frames  12  of the stroller  1  leave to their using position, the connecting rod  183  slides out from the hollow space  1822  gradually. Consequently, the stroller  1  having front protect frame  18  which changes its position according to the change of the stroller  1  has such a simple structure. 
     The stroller  1  having simple structure is light enough to be suitable for the parent&#39;s using of going outside or traveling. To carry an automobile safety seat  2  is usually another need. The conventional safety seat only meets the function of safety seat during transportation. When the infant leave the transporting vehicle, it must be moved to the stroller for another voyage. However, in the present invention, the infant is put on the stroller  1  without a further moving by directly put the safety seat  2  on the stroller  1 . Referring to FIGS. 5A,  5 B,  6 A and  6 B, the connecting rod  183  of the front protect frame  18  has a hook open  1831 , while the automobile safety seat  2  has an imbed trough  21  and a locker  22 . The imbed trough  21  can be site across the connecting portion  1821  of the supporting rod  182  of the front protect frame  18 . When the imbed trough  21  is put seated on the front frame  18 , the locker  22  is right match the hook open  1831 . Under this designed structure, the locker  22  can firmly lock onto the hook open  1831  of the connecting rod  183  in case that the safety seat  2  is been put onto the infant stroller  1  for transportation. 
     As in FIGS. 7A and 7B, the handrail frame  181  of the front protect frame  18  of the stroller  1  has a locker  1811 . The safety seat  2  has a straddle frame  23  for mounting on the handrail frame  181 . The straddle frame  23  comprises a hook member  24  for locating on the handrail frame  181  and a hole  25  for been lock up by the locker  1811 . When the straddle frame  23  is put seated on the handrail frame  181 , the locker  1811  is right match the hole  25 . Under this designed structure, the locker  1811  can firmly lock onto the hole  25  of the straddle frame  23  in case that the safety seat  2  is been put onto the infant stroller  1  for transportation. 
     Referring to FIG. 8, which shows another embodiment of the front protect frame  18  of the present invention. The front protection frame  18 ′ comprises a handrail frame  181 ′, a pair of supporting frames  182 ′ and a connecting rod  183 ′. The connecting rod  183 ′ further comprises a first rod  1831 ′ and a second rod  1832 ′. The first rod  1831 ′ and the second rod  1832 ′ are pivotally connected at one end and connected to the supporting frame  182 ′ separately at another end. When the stroller  1  is folding, the first rod  1831 ′ and the second rod  1832 ′ are also pivoting together. 
     As to the manner of usage and operation of the present invention, the same should be apparent from the above description. Accordingly, no further discussion relating to the manner of usage and operation will be provided. 
     With respect to the above description then, it is to be realized that the optimum dimensional relationships for the parts of the invention, to include variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by the present invention. 
     Therefore, the foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not described to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be restored to, falling within the scope of the invention. 
     EFFECTS OF THE INVENTION 
     1. Equipping the stroller with a front protect frame, which changes its status according to changes, folding or unfolding positions, of the stroller. 
     2. Providing a stroller structure which can be equipped with a safety seat which can be either put on the front protect frame of the stroller for accompanying use or put on a car for a single safety seat use. 
     Numerous variations and modifications will suggest themselves to persons skilled in the arts, other than those already described, without departing the basic inventive concepts. Although the present invention has been described with respect to typical preferred embodiments thereof, it should be understood that the present inventions is not limited to these embodiments, and various changes or modifications may be made without departing from the scope of the present invention as defined by the appended claims. 
     While the invention has been described in its preferred embodiments, it is to be understood that the words which have been used are words of description rather than limitation and that changes within the purview of the appended claims may be made without departing from the true scope and spirit of the invention.