1. Field of the Invention
The present invention relates to a safety belt assembly and a child safety seat therewith, and more specifically, to a safety belt assembly and a child safety seat with simple structure and low cost.
2. Description of the Prior Art
As for a conventional design of a safety belt for a child safety seat, one end of the safety belt is generally fixed, and the other end of the safety belt is buckled by a buckle on a seat. When a child seats in the seat and a sudden emergent braking or impact occurs, the child's body would continue to move forward due to inertia and the safety belt can tightly pull the child' s body, thereby preventing the child from flying outwards. However, the conventional safety belt has no flexibility so that the sudden pulling force applied on the child is directly affected by impact. Besides, the child's bones have not developed fully and cannot withstand so strong impact, resulting in vulnerability. Generally, since the safety belt crosses the chest to the shoulder, the child's head still moves forwards due to inertia although the safety belt prevents the body from flying outwards. It might hurt the child's breastbone and backbone. In order to reduce the harm to children, it usually disposes a buffer component on the safety belt. However, the conventional buffer component has complicated structure, inconvenient operation and high cost, which cannot meet people's requirements. Therefore, there is a need to design a safety belt assembly with simple structure, easy operation and low cost.
A purpose of the present invention is to provide a safety belt assembly and a child safety seat with simple structure, improved reliability, easy operation and low cost, to solve the problems mentioned above.
In order to achieve above purposes, the present invention is to provide a safety belt assembly including a safety belt, and a buffer mechanism installed on the safety belt. The buffer mechanism is for detachably connecting two parts of the safety belt in a longitudinal direction so as to form a folding portion of the safety belt. When a pulling force is applied to the safety belt, the buffer mechanism absorbs a part of the pulling force to separate the two parts of the safety belt.
Preferably, the buffer mechanism comprises a sewing thread for sewing the two parts of the safety belt in the longitudinal direction.
Preferably, the buffer mechanism comprises a male buckle and a female buckle for detachably buckling with each other.
Preferably, the buffer mechanism is a Velcro fastener comprising a male Velcro strip with hooks and a female Velcro strip with loops for detachably attaching with each other.
Preferably, the safety belt is a fabric safety belt.
Preferably, the buffer mechanism is installed on a center of the safety belt.
In order to achieve above purposes, the present invention is further to provide a child safety seat. The child safety seat includes a seat body, a cross belt installed on a front side of the seat body, a belt buckle, a safety belt adjuster installed on the front side of the seat body, and two shoulder belts. One end of each shoulder belt is connected to the cross belt, and the other end of each shoulder belt is connected to the belt buckle. The child safety seat further includes a safety belt assembly installed between the belt buckle and the safety belt adjuster. The safety belt assembly includes a safety belt, and a buffer mechanism installed on the safety belt. The buffer mechanism is for detachably connecting two parts of the safety belt in a longitudinal direction so as to form a folding portion of the safety belt. When a pulling force is applied to the safety belt, the buffer mechanism absorbs a part of the pulling force to separate the two parts of the safety belt.
In order to achieve above purposes, the present invention is further to provide a child safety seat. The child safety seat includes a seat body, a cross belt installed on a front side of the seat body, a belt buckle, a safety belt adjuster installed on the front side of the seat body, and two shoulder belts. One end of each shoulder belt is connected to the cross belt, and the other end of each shoulder belt is connected to the belt buckle. The child safety seat further includes two safety belt assemblies. Each safety belt assembly is installed between the belt buckle and the corresponding shoulder belt. Each safety belt assembly includes a safety belt, and a buffer mechanism installed on the safety belt. The buffer mechanism is for detachably connecting two parts of the safety belt in a longitudinal direction so as to form a folding portion of the safety belt. When a pulling force is applied to the safety belt, the buffer mechanism absorbs a part of the pulling force to separate the two parts of the safety belt.
The present invention disposes the buffer mechanism on the safety belt to detachably connect two parts of the safety belt in the longitudinal direction, so as form the folding portion of the safety belt. As the safety belt is pulled by the pulling force in excess of a critical threshold, the buffer mechanism can absorb impact and then separate the two parts of the safety belt to extend the folding portion, so as to tighten the safety belt again for securing the child in the seat body. It has advantages of simple structure, improved reliability, easy operation and low cost.
These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.
In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention maybe practiced. In this regard, directional terminology, such as “top,” “bottom,” “front,” “back,” etc., is used with reference to the orientation of the Figure(s) being described. The components of the present invention can be positioned in a number of different orientations. As such, the directional terminology is used for purposes of illustration and is in no way limiting. Accordingly, the drawings and descriptions will be regarded as illustrative in nature and not as restrictive.
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Preferably, the buffer mechanism 2 is installed on the center of the safety belt 1, and the buffer mechanism 2 includes at least one sewing thread for sewing the two parts of the safety belt 1 in the longitudinal direction of this embodiment. The part between the sewed two parts of the safety belt 1 is formed to be the folding portion 11. When a child seats in the seat body 201 and a sudden emergent braking or impact occurs, the child's body would continue to move forward due to inertia and the shoulder belts 202 can tightly pull the child's body, thereby preventing the child from flying outwards. After the safety belt 1 is pulled by the pulling force in excess of sewing strength of the sewing thread, the sewing thread would break. During the above-mentioned process, the buffer mechanism 2 can absorb a part of the pulling force, so as to prevent the harm to the child due to reaction force provided by the shoulder belts 202. The buffer mechanism 2 not only can connect the two parts of the safety belt 1 to form the folding portion 11 of the safety belt 1, but also can absorb the impact and then be broken to tighten the safety belt 1 again for securing the child in the seat body 201. Besides, the buffer mechanism 2 can include a plurality of sewing threads to provide multiple cushions and protections. It has advantages of simple structure, easy manufacture and low cost.
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In contrast with the prior art, the present invention disposes the buffer mechanism on the safety belt to detachably connect two parts of the safety belt in the longitudinal direction, so as form the folding portion of the safety belt. As the safety belt is pulled by the pulling force in excess of a critical threshold, the buffer mechanism can absorb impact and then separate the two parts of the safety belt to extend the folding portion, so as to tighten the safety belt again for securing the child in the seat body. It has advantages of simple structure, improved reliability, easy operation and low cost.
Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.
Number | Date | Country | Kind |
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201210255712.9 | Jul 2012 | CN | national |