1. Fields of the Invention
The present invention relates to a rear support frame of baby strollers, especially to a rear support frame of baby strollers that provides baby strollers higher strength so as to prevent distortion thereof. At the same time, overwear of rear wheels of baby strollers caused by distortion of the rear support frame can also be avoided. Thus pushing baby strollers is more convenient and energy saving for users and the practical value of baby strollers is enhanced while in use.
2. Descriptions of Related Art
When babies can't walk yet, parents always hold their babies no matter they go. Especially mothers, they always take good care of babies all the time. Thus most of parents have back pains and sore muscles around waist. While growing up, babies start to learn walking and move around with unsteady steps. In many occasions, parents still need to hold their babies in order to protect them. Or babies may get tired and sleepy after running and walking for a while and their parents got to carry babies in their arms. In order to relieves aches and pains in waist and back and release parents' loading, various kinds of baby strollers have been developed and used to carry babies. The baby stroller mainly includes a frame disposed with wheels on a bottom thereof, a seat for babies arranged at the frame and a handle pushing the stroller and disposed on top of the frame. Thus parents can push the baby stroller and move around by the wheels on the bottom of the baby stroller. Therefore, the time that parents hold their babies is shortened and discomfort or fatigue of their hands is relieved.
However, although the above baby stroller is provided to carry babies, the rear support frame disposed on a rear surface of rear frames of the baby stroller is easily deformed when the baby is seated in the stroller and their weight forms a downward load on the rear support frame. Once the rear support frame is deformed, rear wheels of the baby stroller are offset and not aligned on the same axis. Thus while pushing the baby stroller, wheels on an outer side of the rear wheels easily wear out due to uneven force distribution and the proportion of damaged wheels is increased. Moreover, the damaged wheels make pushing the baby stroller even more difficult and hard. Thus there is a need to improve the structure of baby strollers available now.
Therefore it is a primary object of the present invention to provide a rear support frame of baby stroller in which a load is evenly distributed on a front surface and a rear surface between two rear frames on two sides of the baby stroller so as to prevent distortion of the rear support frame. Moreover, the overwear of rear wheels of the baby stroller that leads to inconvenience in pushing can be avoided. The practical value of the baby stroller is enhanced.
In order to achieve above object, a rear support frame according to the present invention includes two symmetrical upper horizontal rods whose inner ends are pivoted to each other, two symmetrical lower horizontal rods whose inner ends are pivoted to each other and a vertical rod arranged between a center pivot part of the two pivoted upper horizontal rods and a center pivot part of the two lower horizontal rods. A connection section is disposed between a top of the vertical rod and the pivot part of the two pivoted upper horizontal rods so as to make outer ends of the upper horizontal rods and outer ends of the lower horizontal rods respectively are pivoted on a front surface and a rear surface (or a rear surface and a front surface) between the two rear frames on two sides of a baby stroller. Thereby when a baby is seated in the baby stroller, a load on the rear support frame is evenly distributed over the front surface and the rear surface of the two rear frames on two sides of the baby stroller.
The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:
Refer to
Thereby also refer to
The connection section between the upper horizontal rods 11 of the rear support frame 1 and the vertical rod 13 can not only be the bending part 131 formed by bending of the top end of the vertical rod 13, as shown in
In summary, compared with structures available now, the present invention primarily includes a vertical rod arranged between a center pivot part of the two pivoted upper horizontal rods and a center pivot part of the two pivoted lower horizontal rods on a rear support frame. A connection section is disposed between the top of the vertical rod and the pivot part of the two upper horizontal rods 11 so that outer ends of the upper horizontal rods and outer ends of the lower horizontal rods respectively are pivoted on a front surface and a rear surface of the rear frames on two sides of a baby stroller. Or the outer ends of the upper horizontal rods and outer ends of the lower horizontal rods respectively are pivoted on a rear surface and a front surface of the rear frames on two sides of a baby stroller. The outer ends of the upper horizontal rods and outer ends of the lower horizontal rods respectively are pivoted to the surfaces that are opposite and corresponding to each other. Thus the load on the rear support frame is distributed evenly over the front surface and the rear surface of the rear frames on two sides of the baby stroller. Thus not only the support strength of the baby stroller is enhanced, the distortion of the rear support frame occurred in use can be avoided. Moreover, the overwear of rear wheels of the baby stroller caused by distortion of the rear support frame is also prevented. For users, the baby stroller is more convenient and more energy efficient. Thus the practical value of the baby stroller is enhanced while in use.
Additional advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details, and representative devices shown and described herein. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.