10 to increase too much.

It should be noted that the number of lower crossbars 122 in the base 120 may not be nine, and may alternatively be less than nine or may be greater than nine. The number of mounting and fixing bars 123 in the base 120 may not be two, and may alternatively be less than two or more than two. Furthermore, the lower crossbars 122 in the base 120 may alternatively be replaced with a hollow mesh structure made of the carbon fiber material or a structure arranged in other ways. The above-mentioned designs may be specifically selected based on actual conditions and shall all fall in the scope of protection of this application.

As shown in FIG. 10, at the bottom of the base 120, a fixing rail 1231 is disposed on the side of each mounting and fixing bar 123 facing away from the lower crossbars 122. The fixing rail 1231 includes a plurality of mounting positions 1231a for fixing to the automobile. The carbon fiber rooftop tent 10 is fixed to the top of the automobile by means of the mounting positions 1231a. Each fixing rail 1231 extends along a length of the mounting and fixing bar 123. At least one first screw hole 1231b is defined at each of both ends of the fixing rail 1231. The first screw hole 1231b corresponds to the bottom of the lower frame 121. Each mounting and fixing bar 123 is fixed to the bottom of the lower frame 121 with screws to ensure the connection strength of the mounting and fixing bar 123.

In addition, the mounting and fixing bar 123 further defines a plurality of second screw holes 1232, which are disposed in one-to-one correspondence with the lower crossbars 122. The second screw holes 1232 are defined outside the fixing rail 1231, and the second screw holes 1232 are alternately disposed on both sides of the fixing rail 1231. That is, the former second screw hole 1232 is located on one side of the fixing rail 1231, and the latter second screw hole 1232 is located on the other side of the fixing rail 1231. The mounting and fixing bar 123 is connected to the lower crossbars 122 through screws to further improve the stability of the base 120.

In the embodiments of this application, the upper crossbars 1112, the lower crossbars 122, and the mounting and fixing bars 123 are all bar-shaped profiles with hollow interiors. The upper crossbars 1112 and the mounting and fixing bars 123 may be made of aluminum alloy profiles, which can reduce the overall weight of the carbon fiber rooftop tent 10 while ensuring the structural strength. Furthermore, the interior of each of the upper frame 1111 and the lower frame 121 may also be a hollow structure, thereby further reducing the overall weight of the carbon fiber rooftop tent 10.

As shown in FIG. 3, FIG. 6, FIG. 9, and FIG. 11, there are two support rods 130 in the tent support assembly 100. The two support rods 130 are respectively located on both sides of the carbon fiber rooftop tent 10 to support the upper cover 110 from both sides. The support rod 130 uses a gas spring, and utilizes the telescopic characteristics of the gas spring to support the upper cover 110 when it is in an open state. Of course, the support rod 130 may also adopt structures such as telescopic rods or spring steel.

The bottom of the upper frame 1111 is of a stepped shape, that is, the outer edge of the bottom of the upper frame 1111 protrudes from the rest of the bottom, so that the rest of the bottom of the upper frame 1111 forms a step surface, and so the side of the upper cover 110 facing the base 120 forms a second receiving groove 152. The cross section of the lower frame 121 is L-shaped, specifically including a lateral side and a vertical side that are perpendicular to each other, so that a first receiving groove 151 is defined in the side of the base 120 facing the upper cover 110. One end of the support rod 130 is fixed to the lateral side of the lower frame 121, and the other end is fixed to the step surface at the bottom of the upper frame 1111. In other words, one end of the support rod 130 is connected to the bottom of the first receiving groove 151, and the other end of the support rod 130 is connected to the bottom of the second receiving groove 152. The first receiving groove 151 and the second receiving groove 152 jointly form an accommodating chamber 150. When the tent support assembly 100 is folded, the edge of the upper cover 110 abuts the edge of the base 120, and the support rod 130 shrinks into the accommodating chamber 150, thereby saving the internal space of the carbon fiber rooftop tent 10, preventing the carbon fiber rooftop tent 10 from increasing in height and volume, and making the folded carbon fiber rooftop tent 10 even smaller in size and easier to carry.

As shown in FIG. 12, ladder buckles 125 are also disposed on both sides and the front end of the lower frame 121 for fixing the ladder, so that users can enter the interior of the carbon fiber rooftop tent 10 through the ladder. Furthermore, in the embodiments of this application, ladder buckles 125 are not only disposed at the front end of the lower frame 121 but also on both sides of the lower frame 121 thus meeting the needs of users to enter the interior of the carbon fiber rooftop tent 10 from different positions.

As shown in FIG. 3 and FIG. 13, the carbon fiber rooftop tent 10 further includes a fastening assembly 300. The fastening assembly 300 includes a first fastening piece 310 and a second fastening piece 320. The first fastening piece 310 is located in the base 120 and connected to the outer side of the lower frame 121. The second fastening piece 320 is located in the upper cover 110 and connected to the outer side of the upper frame 1111. Through the cooperation of the first fastening piece 310 and the second fastening piece 320, the base 120 and the upper cover 110 are locked together. Specifically, during use, the fastening assembly 300 is opened and the upper cover 110 is lifted. At this time, the support rods 130 hold up the upper cover 110 and the carbon fiber rooftop tent 10 enters the unfolded state. After using the carbon fiber rooftop tent 10, the tent fabric assembly 200 may be retracted into the tent support assembly 100, the upper cover 110 may be pressed to be closed with the base 120, and the fastening assembly 300 may be locked thereby achieving the folding of the carbon fiber rooftop tent 10.

The carbon fiber rooftop tent 10 has four fastening assemblies 300, two of which are located on both sides of the carbon fiber rooftop tent 10, and the other two are located at the front end of the carbon fiber rooftop tent 10, to ensure a good fit between the upper cover 110 and the base 120 after the carbon fiber rooftop tent