Head protection safety air bag and automobile seat comprising same

Abstract

The invention discloses a head protection safety air bag which is installed in a seat backrest and comprises an air bag body and an air generator, and the air generator is used for inflating air into the air bag body so that the air bag body can be rapidly unfolded and protect the head of a passenger. The air bag comprises an arc-shaped air guide bag body and a round cap-shaped head protection bag body communicated with the arc-shaped air guide bag body, and the arc-shaped air guide bag body is unfolded towards the upper portion of the rear side of a seat backrest in the posture of being tightly attached to the rear side face of the seat backrest and crosses over a seat headrest after the air generator is inflated with air. The arc-shaped air guide bag body guides air into the round-cap-shaped head protection bag body, so that the round-cap-shaped head protection bag body is unfolded and wraps the periphery of the head of a passenger. The invention further discloses an automobile seat comprising the head protection safety air bag. The head protection device can protect the head of a passenger during front collision in a wide-angle lying posture, and can also be used for multi-directional protection after a seat rotates.

Description

Technical Field

[0001] The invention relates to the technical field of automobile safety airbags, and in particular to a head protection safety airbag and an automobile seat comprising the airbag. Background Art

[0002] With the increasing penetration rate of the passenger vehicle market, people's awareness of automobile safety is also gradually improving. At present, most vehicles are equipped with airbags to improve the safety restraint protection capabilities of the vehicle. With the popularization of smart cockpits, in order to meet people's pursuit of comfort, vehicles are equipped with seats in a large-angle lying posture or rotating seats. The existing restraint system cannot provide normal protection, especially in a lying position. When the vehicle has a frontal collision, the occupants are sitting forward, or when the rear collision occurs, the occupants are sitting backward. Under the premise of wearing seat belts normally, the head rotates in the opposite direction of the collision due to inertia, which is very likely to cause injury. Therefore, in order to reduce the head injury of the occupants in this situation, head protection airbags are equipped on the seats to restrain the movement of the occupants' heads and reduce the range of movement of the occupants' heads.

[0003] Therefore, the applicant has found a solution to the above-mentioned problem through beneficial exploration and research, and the technical solution to be introduced below is produced in this context. Summary of the invention

[0004] One of the technical problems to be solved by the present invention is to provide a head protection airbag to address the deficiencies of the prior art, which can restrain the movement of the occupant's head during a car collision without causing additional damage.

[0005] The second technical problem to be solved by the present invention is to provide a car seat including the above-mentioned head protection airbag.

[0006] As a first aspect of the present invention, a head protection airbag is installed in a seat back, comprising an airbag and a gas generator, wherein the gas generator is used to fill the airbag with gas so that the airbag is rapidly deployed and protects the head of the occupant;

[0007] The airbag includes an arc-shaped air guide bag body and a round-hat-shaped head protection bag body connected to the arc-shaped air guide bag body. After the gas generator is filled with gas, the arc-shaped air guide bag body unfolds toward the upper rear side of the seat back and passes over the seat headrest in a posture of closely adhering to the rear side of the seat back. The arc-shaped air guide bag body introduces gas into the round-hat-shaped head protection bag body, so that the round-hat-shaped head protection bag body unfolds and wraps around the occupant's head.

[0008] In a preferred embodiment of the present invention, the arc-shaped air-guiding bag body includes an inner piece and an outer piece, the lower middle portion of the inner piece is rectangular, and the upper portion thereof is Y-shaped, the lower middle portion of the outer piece is rectangular, and the upper portion thereof is Y-shaped, and a plurality of shuttle-shaped holes are arranged at intervals along the air-guiding direction on the rectangular area of ​​the inner piece; during sewing, the edges of each shuttle-shaped hole of the inner piece are butted so that the inner piece is curved inwardly, and the peripheries of the inner piece and the outer piece except for their upper side edges are sewn.

[0009] In a preferred embodiment of the present invention, the shape of the inner piece is similar to that of the outer piece, and the size of the outer piece is slightly larger than that of the inner piece, so that the arc-shaped air guide bag body after the inner and outer pieces are sewn together bends inward after being inflated and expanded.

[0010] In a preferred embodiment of the present invention, the arc-shaped air guide bag body also includes at least one arc-shaped draw strap, each arc-shaped draw strap is provided with a plurality of ventilation holes spaced apart along the length direction, each arc-shaped draw strap is located between the inner panel and the outer panel and is arranged perpendicular to the air guide direction and divides the air guide cavity in the arc-shaped air guide bag body into a plurality of air guide channels, the inner edge of each arc-shaped draw strap is sewn to the inner side surface of the inner panel, and the outer edge thereof is sewn to the inner side surface of the outer panel.

[0011] In a preferred embodiment of the present invention, the round hat-shaped head protection bag body comprises a lower cover piece and an upper cover piece;

[0012] The lower cover piece is formed by sewing a plurality of lower petal-shaped pieces arranged side by side in the circumferential direction, two adjacent lower petal-shaped pieces are sewn along one side edge to form a hemispherical lower cover body, the upper ends of all the lower petal-shaped pieces are sewn to form the apex of the hemispherical lower cover body, and the lower side edges of all the lower petal-shaped pieces are sewn to form a circular bottom periphery of the hemispherical lower cover body;

[0013] The upper cover piece is formed by sewing a plurality of upper petal-shaped pieces arranged side by side in the circumferential direction, and two adjacent upper petal-shaped pieces are sewn along one side edge to form a hemispherical upper cover body, and the upper ends of all the upper petal-shaped pieces are sewn to form the apex of the hemispherical upper cover body, and the lower side edges of all the upper petal-shaped pieces are sewn to form the circular bottom periphery of the hemispherical upper cover body;

[0014] The size of the hemispherical upper cover body is larger than that of the hemispherical lower cover body. The hemispherical upper cover body covers the hemispherical lower cover body and a round cap-shaped chamber is formed between the two. The front half of the circular bottom circumference of the hemispherical upper cover body is sewn with the front half of the circular bottom circumference of the hemispherical lower cover body, the rear half of the circular bottom circumference of the hemispherical upper cover body is sewn with the upper side edge of the outer piece, and the rear half of the circular bottom circumference of the hemispherical lower cover body is sewn with the upper side edge of the inner piece.

[0015] In a preferred embodiment of the present invention, a plurality of middle drawstrings for adjusting the distance between the hemispherical lower cover body and the hemispherical upper cover body are arranged between each lower petal-shaped piece and its corresponding upper petal-shaped piece.

[0016] In a preferred embodiment of the present invention, it also includes symmetrically arranged left and right limiting drawstrings, one end of which is connected to the lower side edge of the round hat-shaped head protection bag body, and the other end is fixed to the left and right sides of the seat back.

[0017] In a preferred embodiment of the present invention, it also includes a transverse limiting drawstring, the middle position of which is fixed on the outer side of the arc-shaped air guide bag body, and the left and right ends of which are fixed on the upper ends of the left and right sides of the seat back.

[0018] As a second aspect of the present invention, a car seat comprises a seat back, in which the above-mentioned head protection airbag is arranged.

[0019] Due to the adoption of the above technical solution, the beneficial effect of the present invention is that: the present invention adds a head protection airbag on the basis of the existing car seat, which can realize the protection of the occupants under new needs. It not only protects the occupants' heads in frontal collisions in a lying position at a large angle, but can also be used for multi-directional protection after the seat is rotated. After deployment, it will neither affect the comfort of the occupants nor cause additional harm to the occupants. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic structural diagram of a car seat equipped with a head protection airbag according to the present invention (the airbag is in an unexpanded state).

[0022] Figure 2It is a schematic structural diagram of a car seat equipped with a head protection airbag according to the present invention (the airbag is in an expanded state and the car seat is in a lying position with a large inclination angle).

[0023] Figure 3 The invention is a schematic structural diagram of an air bag cut piece of an arc-shaped air guide bag body of a head protection safety air bag.

[0024] Figure 4 The invention discloses a schematic structural diagram of an air bag cut piece of a round hat-shaped head protection bag body of a head protection safety air bag.

[0025] Figure 5 It is a schematic structural diagram of the left and right limiting drawstrings of the present invention.

[0026] Figure 6 It is a schematic structural diagram of the transverse limiting drawstring of the present invention.

[0027] Figure 7 It is a schematic diagram of folding the airbag of the head protection airbag of the present invention. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0029] See also Figure 1 and Figure 2 , a car seat is shown in the figure, including a seat back 10, in which a head protection airbag 20 is arranged.

[0030] The head protection airbag 20 includes an airbag 200 and a gas generator (not shown in the figure). The gas generator is installed in the seat back 10 through a connecting bracket (not shown in the figure). It is used to fill gas into the airbag 200 so that the airbag 200 can be quickly deployed and protect the occupant's head.

[0031] The airbag 200 includes an arc-shaped air guide bag body 210 and a round-hat-shaped head protection bag body 220. One end of the arc-shaped air guide bag body 210 is an air inlet end, which is connected to the air outlet end of the gas generator, and the other end is connected to the round-hat-shaped head protection bag body 220. The arc-shaped air guide bag body 210 is used to provide an air guide channel, and its special shape can keep the airbag close to the seat back 10 during the deployment process, passing over the seat headrest 110, ensuring that the deployment direction is controllable and stable. The round-hat-shaped head protection bag body 220 is used to wrap the occupant's head around and on the top, similar to a round hat, to provide energy absorption protection for the occupant's head.

[0032] When a collision occurs, the gas generator is ignited and gas is filled into the arc-shaped air guide bag body 210, so that the arc-shaped air guide bag body 210 is unfolded toward the upper rear side of the seat back 10 and passes over the seat headrest 11 in a posture of being closely attached to the rear side of the seat back 10. At the same time, the arc-shaped air guide bag body 210 introduces gas into the round-hat-shaped head protection bag body 220, so that the round-hat-shaped head protection bag body 220 is unfolded and wrapped around the occupant's head. That is, after the round-hat-shaped head protection bag body 220 is unfolded, it can completely cover the occupant's head 30, including the top surface, left side, right side and back of the head 30, and its front side extends to the chin position of the head 30. Figure 2 shown.

[0033] See also Figure 3 Combined with Figure 2 The arc-shaped air guide bag body 210 includes an inner panel 211, an outer panel 212, and two arc-shaped drawstrings 213. The middle and lower part of the inner panel 211 is rectangular, and the upper part thereof is Y-shaped. The middle and lower part of the outer panel 212 is rectangular, and the upper part thereof is Y-shaped. Four shuttle holes 2111 are arranged at intervals along the air guide direction on the rectangular area of ​​the inner panel 211. Of course, the number of shuttle holes 2111 is not limited to the number in this embodiment, and it should be arranged according to design requirements. During sewing, the edge 2111a of each shuttle hole 2111 of the inner panel 211 is aligned, so that the inner panel 211 is bent inwardly, and the periphery of the inner panel 211 and the outer panel 212 except the upper side edge thereof are sewn, that is, the edges 2112, 2113, 2114, 2116, 2117 of the inner panel 211 are aligned with the edges 2121, 2122, 2123, 2125, 2126 of the outer panel 212 respectively, and the edge 2115 is not aligned with the edge 2124. The shape of the inner panel 211 is similar to that of the outer panel 212, and the size of the outer panel 212 is slightly larger than that of the inner panel 211, so that the arc-shaped air guide bag body 210 after the inner panel 211 and the outer panel 212 are sewn together bends inwardly after being inflated and unfolded.

[0034] The inner panel 211 and the outer panel 212 are fixed together by two arc-shaped drawstrings 213 to maintain the shape and thickness after being filled. Each arc-shaped drawstring 213 is provided with a plurality of vents 2131 spaced apart along the length direction, which are used to communicate the gas on both sides after sewing, and are conducive to maintaining balance and stability after inflation. Each arc-shaped drawstring 213 is located between the inner panel 211 and the outer panel 212 and is arranged perpendicular to the air guiding direction and divides the air guiding cavity in the arc-shaped air guiding bag body 210 into a plurality of air guiding channels.

[0035] The inner edge of each arc-shaped drawstring 213 is sewn on the inner side of the inner panel 211, and the outer edge thereof is sewn on the inner side of the outer panel 212, that is, the inner edge 2132 of each arc-shaped drawstring 213 is sewn on the position 2118 corresponding to the inner panel 211, and the outer edge 2133 thereof is sewn on the position 2127 corresponding to the outer panel 212. Of course, the number of arc-shaped drawstrings 213 is not limited to the number in the present embodiment, and it should be provided according to the design requirements, and it can be provided as one or more. Due to the function of the arc-shaped drawstrings 213, the arc-shaped air guide bag body 210 becomes an arc shape after being inflated, and can be closely attached to the seat back 20.

[0036] After the inner panel 211, the outer panel 212 and the arc-shaped drawstring 213 are sewn together, an arc-shaped chamber is formed, wherein position 211a (212a) in the arc-shaped chamber is the air inlet, position 211b (212b) is the air inlet channel, and position 211c (212c) is connected to the round hat-shaped head protection bag body 220.

[0037] See also Figure 4 Combined with Figure 2 The round hat-shaped head protection bag body 220 includes a lower cover piece 221, an upper cover piece 222 and a plurality of middle drawstrings 223.

[0038] The lower cover piece 221 is formed by sewing eight lower petal-shaped pieces 2211, 2212, 2213, 2214, 2215, 2216, 2217, and 2218 arranged side by side in the circumferential direction. Of course, the number of lower petal-shaped pieces is not limited to the number in the present embodiment, and should be arranged according to the design requirements. Two adjacent lower petal-shaped pieces are sewn along one side edge to form a hemispherical lower cover body, and the upper ends of all the lower petal-shaped pieces are sewn to form the apex of the hemispherical lower cover body, and the lower side edges of all the lower petal-shaped pieces are sewn to form a circular bottom periphery of the hemispherical lower cover body.

[0039] Specifically, the sewing method of the lower cover piece 221 is that the right edge 2211a of the lower petal-shaped piece 2211 is sewn with the left edge 2212a of the adjacent lower petal-shaped piece 2212, and the left edge 2211b of the lower petal-shaped piece 2211 is sewn with the right edge 2218a of the adjacent lower petal-shaped piece 2218. After all the lower petal-shaped pieces are sewn side by side, a hemispherical surface is formed. The upper vertices of the lower petal-shaped pieces 2211, 2212, 2213, 2214, 2215, 2216, 2217, and 2218 are sewn together. Among them, the lower petal-shaped pieces 2211, 2212, and 2213 are located in the front, and the lower petal-shaped pieces 2214, 2215, 2216, 2217, and 2218 are located in the back. The lower edges of the lower petal-shaped cutting pieces 2211, 2212, 2213 located at the front form a semicircle, and the lower edges of the lower petal-shaped cutting pieces 2214, 2215, 2216, 2217, 2218 located at the rear form a semicircle.

[0040] The upper cover piece 222 is formed by sewing eight upper petal-shaped pieces 2221 arranged side by side in the circumferential direction. Of course, the number of upper petal-shaped pieces is not limited to the number in the present embodiment, and should be arranged according to the design requirements. Two adjacent upper petal-shaped pieces 2221 are sewn along one side edge to form a hemispherical upper cover body, and the upper ends of all the upper petal-shaped pieces 2221 are sewn to form the apex of the hemispherical upper cover body, and the lower side edges of all the upper petal-shaped pieces 2221 are sewn to form the circular bottom periphery of the hemispherical upper cover body.

[0041] Specifically, the upper cover pieces 222 are sewn in such a manner that the right edge 2221a of the upper petal-shaped piece 2221 is sewn with the left edge 2222a of the adjacent upper petal-shaped piece 2222, and the left edge 2221b of the upper petal-shaped piece 2221 is sewn with the right edge 2228a of the adjacent upper petal-shaped piece 2228. After all the upper petal-shaped pieces are sewn side by side, a hemispherical surface is formed. The upper end vertices of the upper petal-shaped pieces 2221, 2222, 2223, 2224, 2225, 2226, 2227, 2228 are sewn together. Among them, the upper petal-shaped pieces 2221, 2222, 2223 are located in the front, and the upper petal-shaped pieces 2224, 2225, 2226, 2227, 2228 are located in the back. The lower edges of the upper petal-shaped cutting pieces 2221, 2222, 2223 located at the front form a semicircle, and the lower edges of the upper petal-shaped cutting pieces 2224, 2225, 2226, 2227, 2228 located at the rear form a semicircle.

[0042] The size of the hemispherical upper cover body is larger than that of the hemispherical lower cover body. The hemispherical upper cover body covers the hemispherical lower cover body and a round hat-shaped chamber is formed between the two. The front half of the circular bottom circumference of the hemispherical upper cover body is sewn to the front half of the circular bottom circumference of the hemispherical lower cover body, the rear half of the circular bottom circumference of the hemispherical upper cover body is sewn to the upper side edge of the outer panel 212, and the rear half of the circular bottom circumference of the hemispherical lower cover body is sewn to the upper side edge of the inner panel 211.

[0043] Specifically, the semicircle formed by the lower edges of the upper petal-shaped pieces 2221, 2222, 2223 of the hemispherical upper cover body and the semicircle formed by the lower edges of the lower petal-shaped pieces 2211, 2212, 2213 of the hemispherical lower cover body are sewn together to achieve a sealed effect. The semicircle formed by the lower edges of the upper petal-shaped pieces 2224, 2225, 2226, 2227, 2228 of the hemispherical upper cover body is sewn with the upper side edge 2124 of the outer piece 212, and the semicircle formed by the lower edges of the lower petal-shaped pieces 2214, 2215, 2216, 2217, 2218 of the hemispherical lower cover body is sewn with the upper side edge 2125 of the inner piece 211, thereby achieving internal communication between the arc-shaped air guide bag body 210 and the round hat-shaped head protection bag body 220.

[0044] The middle drawstring 223 is arranged between the lower petal-shaped piece and its corresponding upper petal-shaped piece, and is used to adjust the distance between the hemispherical lower cover and the hemispherical upper cover. The middle drawstring 223 is sewn in the following manner: the vertex of the hemispherical upper cover formed after sewing and the vertex of the hemispherical lower cover formed after sewing are respectively sewn with the two ends 2231, 2232 of the middle drawstring 223, and are used to adjust the distance between the two. The middle position 2221c of the upper petal-shaped piece 2221 and the middle position 2211c of the lower petal-shaped piece 2211 are respectively sewn with the two ends 2231, 2232 of another middle drawstring 223. The left edge 2221b of the upper petal-shaped piece 2221 and the left edge 2211b of the lower petal-shaped piece 2211 are respectively sewn with the two ends 2231, 2232 of another middle drawstring 223. The right edge 2221a of the upper petal-shaped piece 2221 and the right edge 2211a of the lower petal-shaped piece 2211 are respectively sewn with the two ends 2231 and 2232 of another middle drawstring 223. By connecting the drawstrings at three positions, the distance between the upper and lower covers can be better adjusted. Similarly, the sewing method of the drawstrings between the remaining upper petal-shaped pieces and the lower petal-shaped pieces is similar.

[0045] To further improve the deployment stability of the airbag, see Figure 5 Combined with Figure 2The air bag 200 is added with symmetrically arranged left and right limiting drawstrings 230a, 230b, one end of which is connected to the lower side edge of the round hat-shaped head protection bag body 220, and the other end is fixed to the left and right sides of the seat back 10.

[0046] Further, see Figure 6 Combined with Figure 2 The air bag 200 is added with a transverse limiting strap 240, the middle position 241 of which is fixed to the outer side surface of the arc-shaped air guide bag body 210, i.e., the outer side surface of the outer panel 212, and the left and right ends thereof are fixed to the upper ends of the left and right sides of the seat back 10, so that the transverse limiting strap 240 surrounds the air bag, thereby playing the role of fixing and guiding the air guide channel.

[0047] See also Figure 7 After the air bag 200 is folded, it is placed in the seat back 10 together with the gas generator 300 and other mechanisms. Figure 7 As shown, the lower end of the airbag 200 is Z-folded 4 times, and the upper end is rolled inwardly for several times. The purpose of the Z-fold is to facilitate the airbag to quickly deploy from the seat back, and the purpose of the roll-fold is to be able to deploy inwardly, so as to achieve the purpose of covering the occupant's head after the airbag is deployed.

[0048] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A head protection airbag, which is installed in a seat back, comprises an airbag and a gas generator, wherein the gas generator is used to fill the airbag with gas so that the airbag is rapidly deployed and protects the head of the occupant; characterized in that: The airbag includes an arc-shaped air guide bag body and a round-hat-shaped head protection bag body connected to the arc-shaped air guide bag body. After the gas generator is filled with gas, the arc-shaped air guide bag body unfolds toward the upper rear side of the seat back and passes over the seat headrest in a posture of closely adhering to the rear side of the seat back. The arc-shaped air guide bag body introduces gas into the round-hat-shaped head protection bag body, so that the round-hat-shaped head protection bag body unfolds and wraps around the occupant's head.

2. The head protection airbag according to claim 1, characterized in that: The arc-shaped air-guiding bag body includes an inner piece and an outer piece. The middle and lower part of the inner piece is rectangular, and the upper part is Y-shaped. The middle and lower part of the outer piece is rectangular, and the upper part is Y-shaped. A plurality of shuttle-shaped holes are arranged at intervals along the air-guiding direction on the rectangular area of ​​the inner piece. When sewing, the edges of each shuttle-shaped hole of the inner piece are sewn together so that the inner piece is bent inwardly, and the peripheries of the inner piece and the outer piece except for their upper side edges are sewn together.

3. The head protection airbag according to claim 2, characterized in that: The shape of the inner piece is similar to that of the outer piece, and the size of the outer piece is slightly larger than that of the inner piece, so that the arc-shaped air guide bag body after the inner piece and the outer piece are sewn together bends inwards after being inflated and unfolded.

4. The head protection airbag according to claim 2, characterized in that: The arc-shaped air guide bag body also includes at least one arc-shaped drawstring, each arc-shaped drawstring is provided with a plurality of ventilation holes spaced apart along the length direction, each arc-shaped drawstring is located between the inner panel and the outer panel and is arranged perpendicular to the air guide direction and divides the air guide cavity in the arc-shaped air guide bag body into a plurality of air guide channels, the inner edge of each arc-shaped drawstring is sewn to the inner side surface of the inner panel, and the outer edge thereof is sewn to the inner side surface of the outer panel.

5. The head protection airbag according to claim 2, characterized in that: The round hat-shaped head protection bag body comprises a lower cover piece and an upper cover piece; The lower cover piece is formed by sewing a plurality of lower petal-shaped pieces arranged side by side in the circumferential direction, two adjacent lower petal-shaped pieces are sewn along one side edge to form a hemispherical lower cover body, the upper ends of all the lower petal-shaped pieces are sewn to form the apex of the hemispherical lower cover body, and the lower side edges of all the lower petal-shaped pieces are sewn to form a circular bottom periphery of the hemispherical lower cover body; The upper cover piece is formed by sewing a plurality of upper petal-shaped pieces arranged side by side in the circumferential direction, and two adjacent upper petal-shaped pieces are sewn along one side edge to form a hemispherical upper cover body, and the upper ends of all the upper petal-shaped pieces are sewn to form the apex of the hemispherical upper cover body, and the lower side edges of all the upper petal-shaped pieces are sewn to form the circular bottom periphery of the hemispherical upper cover body; The size of the hemispherical upper cover body is larger than that of the hemispherical lower cover body. The hemispherical upper cover body covers the hemispherical lower cover body and a round cap-shaped chamber is formed between the two. The front half of the circular bottom circumference of the hemispherical upper cover body is sewn with the front half of the circular bottom circumference of the hemispherical lower cover body, the rear half of the circular bottom circumference of the hemispherical upper cover body is sewn with the upper side edge of the outer piece, and the rear half of the circular bottom circumference of the hemispherical lower cover body is sewn with the upper side edge of the inner piece.

6. The head protection airbag according to claim 5, characterized in that: A plurality of middle drawstrings for adjusting the distance between the hemispherical lower cover body and the hemispherical upper cover body are arranged between each lower petal-shaped cut piece and its corresponding upper petal-shaped cut piece.

7. The head protection airbag according to any one of claims 1 to 6, characterized in that: It also includes symmetrically arranged left and right limiting drawstrings, one end of which is connected to the lower side edge of the round hat-shaped head protection bag body, and the other end is fixed to the left and right sides of the seat back.

8. The head protection airbag according to any one of claims 1 to 6, characterized in that: It also includes a transverse limiting drawstring, the middle position of which is fixed on the outer side of the arc-shaped air guide bag body, and the left and right ends of which are fixed on the upper ends of the left and right sides of the seat back.

9. A car seat, comprising a seat back, wherein the seat back is provided with a head protection airbag as claimed in any one of claims 1 to 8.

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