Side impact protection device of automobile child safety seat and child safety seat

Abstract

A side collision protection device of an automobile child safety seat comprises a base, a side collision protection device and a side collision protection device, an adjusting assembly; an anti-collision member; the device is characterized in that the adjusting assembly comprises a rotary knob and a screw rod, and a screw hole matched with the screw rod in a threaded mode is formed in the base in a penetrating mode; the anti-collision piece is provided with a mounting hole, the adjusting assembly is movably arranged in the mounting hole in a penetrating mode, and an axial limiting structure is arranged between the anti-collision piece and the adjusting assembly. The child safety seat comprises a seat body and is characterized in that the side collision protection device is arranged on the outer side surface of the seat body, a mounting groove is formed in the outer side surface of the seat body in a concave mode, and the anti-collision piece is contained in the mounting groove when the anti-collision piece is adjusted to be closest to the base. The center-of-gravity position of the anti-collision piece is stable through translational motion, and the adaptability to the anti-collision pieces in different shapes is enhanced; according to the child safety seat, the mounting groove of the seat body is matched with the anti-collision piece in shape, and the axial translational motion of the anti-collision piece is further stabilized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a side crash protection device of automobile child safety seat. BACKGROUND

[0002] The child safety seat is a kind of seat specially used for protecting the safety of children, which is installed on the seat of the car. Usually, the child safety seat is installed on the rear seat, especially in the position close to the door. It is necessary to configure a side crash protection device on the child safety seat to avoid the impact on the safety seat. The side crash protection device can absorb most of the energy generated by the impact, thereby reducing the impact force on the safety seat and the child on the safety seat. At present, the side crash protection device on the market is mostly a decorative block arranged on one side of the safety seat, and the decorative block is directly formed on the outer surface of the safety seat or fixedly connected with the outer surface of the safety seat. Therefore, the distance between the side crash protection device and the outer surface of the child safety seat cannot be adjusted. Since the collision surface of the side crash protection mechanism needs to be protruded relative to the side of the seat to make it easy to collide with the vehicle body first, the fixedly arranged device needs to be designed according to its installation position and the shape of the side of the seat, which is more troublesome.

[0003] In view of the above problems, the prior art such as a Chinese utility model patent with patent number ZL201822178905.4 (publication number CN209257923U) discloses a side crash protection assembly with adjustable distance between door and anti-collision part. The screw rod is fixed to the inner side of the anti-collision part. The user rotates the anti-collision part to adjust the screwing depth of the screw rod in the threaded hole to control the horizontal distance between the anti-collision part and the base, so that the screw rod can be adjusted according to the protrusion degree of the side of the seat, so that the distance between the outer side of the anti-collision part and the door is always greater than the distance between the side of the seat and the door, thereby achieving the function of adapting to seats with different side shapes.

[0004] In reality, in order to improve the sales volume of child safety seats, the shape of the anti-collision part will be designed into different shapes according to the needs of the buyers. The above-mentioned patent uses the adjustment mode of rotating the anti-collision part to control the distance between the anti-collision part and the door. However, the center of gravity of these different shaped anti-collision parts may not be on the rotation axis of the screw rod. During the rotation process, due to the constant change of the center of gravity, the screw rod is easy to tilt outward relative to the axis and press against the internal thread of the screw hole, thereby causing the screw rod to be easily stuck in the screw hole, affecting the user's use. SUMMARY

[0005] The first technical problem to be solved by the utility model is to provide a side crash protection device with stable center of gravity of anti-collision part during rotation adjustment and more stable adjustment.

[0006] The second technical problem to be solved by this utility model is to provide a child safety seat with the aforementioned side collision protection device, in light of the current state of the prior art.

[0007] The technical solution adopted by this utility model to solve the first technical problem is as follows: the side impact protection device of the car child safety seat is installed on the outer surface of the safety seat and includes:

[0008] The base is fixedly connected to the safety seat;

[0009] An adjustment component is movably located within the base;

[0010] The anti-collision component is mounted on the base via the adjustment assembly, and the distance between the anti-collision component and the base can be adjusted via the adjustment assembly, thereby adjusting the distance between the anti-collision component and the outer surface of the safety seat;

[0011] Its features are:

[0012] The adjustment assembly includes a knob for applying external force and a screw fixedly connected to the knob. The base has a threaded hole that is threaded into the screw. The knob can drive the screw to rotate along the thread in the threaded hole.

[0013] The anti-collision component is provided with a mounting hole, and the adjustment component is movably inserted into the mounting hole. An axial limiting structure is provided between the anti-collision component and the adjustment component, so that when the external force drives the knob to rotate and the screw to rotate along the thread in the screw hole, the adjustment component drives the anti-collision component to move axially outward or inward, thereby causing the anti-collision component to move axially away from or closer to the base.

[0014] To enhance the stability of the axial connection structure and the anti-collision component, the axial limiting structure further includes:

[0015] The first limiting part, which is arranged in a ring shape, is formed by protruding outward from the outer side wall of the knob in a circumferential direction.

[0016] The second limiting part, arranged in a ring shape, protrudes outward circumferentially from the end of the screw near the anti-collision member. The first and second limiting parts are spaced axially apart. A limiting protrusion protrudes inward from the inner wall of the mounting hole of the anti-collision member, and this limiting protrusion is movably engaged within the gap between the first and second limiting parts. By movably engaging the limiting protrusion between the first and second limiting parts, the anti-collision member does not rotate along with the knob and screw while the adjusting assembly moves it axially.

[0017] To prevent damage to the child safety seat and crash barrier when the user adjusts it inward, the outer diameter of the second limiting part is further larger than the diameter of the screw hole. When the crash barrier is adjusted to its closest position to the base, the second limiting part abuts against the base at the periphery of the outer opening of the screw hole. This abutment between the second limiting part and the screw hole prevents the user from further rotating the adjustment assembly inward, thus avoiding pressure between the inner surface of the crash barrier and the base, and between the end of the screw furthest from the crash barrier and the child safety seat.

[0018] To prevent the adjusting component from rotating along with the anti-collision component, the screw further features an axially protruding annular connecting portion at its connection with the knob. This connecting portion is located between the first and second limiting portions, and a gap is provided between the connecting portion and the limiting protrusion to allow the adjusting component to rotate relative to the anti-collision component. This gap prevents circumferential contact and friction between the connecting portion and the limiting protrusion during rotation.

[0019] To ensure that the anti-collision component does not shift radially during rotation adjustment, the anti-collision component further features a radial limiting structure that protrudes axially from the periphery of the mounting hole opening. The first and second limiting portions engage with this radial limiting structure, ensuring that the relative radial position of the adjusting assembly and the anti-collision component remains constant even when an external force drives the knob to rotate and the screw to rotate along the thread within the screw hole. This radial limiting structure restricts the radial movement of the anti-collision component relative to the knob, further stabilizing the anti-collision component's center of gravity.

[0020] To further limit the radial movement of the axial limiting structure, the radial limiting structure further includes:

[0021] The first limiting ring is formed by the anti-collision member protruding axially outward from the periphery of the mounting hole opening. The inner diameter of the first limiting ring matches the outer diameter of the first limiting part, and the outer edge of the first limiting part abuts against the inner wall of the first limiting ring.

[0022] The second limiting ring is formed by the axial inward protrusion of the periphery of the anti-collision member at the opening of the mounting hole. The inner diameter of the second limiting ring matches the outer diameter of the second limiting part, and the outer edge of the second limiting part abuts against the inner wall of the second limiting ring. The first limiting ring radially limits the first limiting part, and the second limiting ring radially limits the second limiting part.

[0023] To stabilize the axial translational movement of the anti-collision component, a guide post is further provided axially on the inner side of the anti-collision component near the base. The base has a guide hole corresponding to the guide post, and the guide post and guide hole are adapted to and slidably engaged. The engagement of the guide post and guide hole stabilizes the translational trajectory of the anti-collision component and also further prevents the anti-collision component from rotating together with the adjustment assembly.

[0024] To prevent the screw from dislodging when the user adjusts the anti-collision component outwards, a third limiting part is further formed by circumferentially protruding outwards from the other end of the screw near the anti-collision component. The outer diameter of the third limiting part is larger than the diameter of the screw hole. When the anti-collision component is adjusted to its furthest position from the base, the third limiting part abuts against the base at the periphery of the inner opening of the screw hole. When the third limiting part abuts against the base at the periphery of the inner opening of the screw hole, the user cannot continue to turn the knob outwards, thus preventing the screw from disengaging from the screw hole.

[0025] Furthermore, the knob has a first connecting hole, and the screw has a second connecting hole that communicates with the first connecting hole. A fastener is inserted at the connection between the first connecting hole and the second connecting hole, and the fastener fixes the knob to the first connecting hole so that the two can rotate synchronously.

[0026] The technical solution adopted by this utility model to solve the second technical problem is as follows: the child safety seat includes a seat body, characterized in that: the outer surface of the seat body is provided with the aforementioned side impact protection device, the outer surface of the seat body is recessed with an installation groove, the side impact protection device is fixedly connected to the bottom of the installation groove; the groove wall of the installation groove is adapted to the shape of the anti-collision component.

[0027] Compared with the prior art, the advantages of this utility model are:

[0028] 1. The side impact protection device of this utility model uses an axial limiting structure between the anti-collision component and the adjustment component to enable the adjustment component to drive the anti-collision component to move axially outward or inward. The translational movement stabilizes the center of gravity of the anti-collision component, avoiding the phenomenon of the screw getting stuck in the screw hole due to the continuous change of the center of gravity of the anti-collision component during the rotation adjustment of anti-collision components of various shapes. This enhances the adaptability to anti-collision components of different shapes and makes the rotation adjustment more stable.

[0029] 2. The child safety seat of this utility model has a mounting groove recessed on the outer surface of the seat body. When the user adjusts the anti-collision component outward, the mounting groove is adapted to the shape of the anti-collision component, and the groove wall of the mounting groove also has a limiting effect on the rotational movement of the anti-collision component, further stabilizing the axial translational movement of the anti-collision component. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the side impact protection device of Embodiment 1 of the present invention installed on the outer surface of a child safety seat.

[0031] Figure 2 This is a partially enlarged cross-sectional view of the connection between the side impact protection device and the child safety seat in Embodiment 1 of this utility model;

[0032] Figure 3This is a cross-sectional view of the side impact protection device according to Embodiment 1 of this utility model;

[0033] Figure 4 for Figure 3 A magnified view of the circled area;

[0034] Figure 5 This is an exploded view of the side impact protection device according to Embodiment 1 of this utility model;

[0035] Figure 6 This is a schematic diagram of the internal structure of the side impact protection device according to Embodiment 1 of this utility model;

[0036] Figure 7 This is an exploded view of the child safety seat according to Embodiment 2 of this utility model. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0038] like Figures 1-6 The diagram shows the preferred embodiment of this utility model. The side impact protection device of this embodiment is located on the outer surface of a car child safety seat, primarily used to reduce the impact force on the safety seat and the child in it. When the safety seat needs to meet the aesthetic requirements of different users, the anti-collision components need to be designed in various shapes. Existing methods use screw rotation adjustment to adjust the distance between the anti-collision component and the car door. However, the center of gravity of various shaped anti-collision components may not be on the rotation axis, and the screw is prone to getting stuck in the screw hole. Therefore, providing a side impact protection device that stabilizes the center of gravity of the anti-collision component during rotation adjustment and provides more stable adjustment would be beneficial. The following will provide a detailed structural description of the side impact protection device for this car child safety seat:

[0039] See Figures 1-5In this embodiment, the side impact protection device of the car child safety seat is installed on the outer surface of the safety seat a. It includes a base 1 fixedly connected to the safety seat a, an adjustment assembly 2 movably disposed within the base 1, and an anti-collision member 3 disposed on the base 1 via the adjustment assembly 2. The anti-collision member 3 can adjust the distance between the anti-collision member 3 and the base 1 via the adjustment assembly 2, thereby adjusting the distance between the anti-collision member 3 and the outer surface of the safety seat a. The adjustment assembly 2 includes a knob 21 for applying external force and a screw fixedly connected to the knob 21. 22. The base 1 is provided with a threaded hole 11 that is threadedly engaged with the screw 22. The knob 21 can drive the screw 22 to rotate along the thread in the threaded hole 11. The anti-collision member 3 is provided with a mounting hole 31. The adjustment component 2 is movably inserted into the mounting hole 31. An axial limiting structure is provided between the anti-collision member 3 and the adjustment component 2. When the external force drives the knob 21 to rotate and the screw 22 to rotate along the thread in the threaded hole 11, the adjustment component 2 drives the anti-collision member 3 to move axially outward or inward, thereby causing the anti-collision member 3 to move axially away from or closer to the base 1.

[0040] See Figure 4 and Figure 6 The axial limiting structure includes a first limiting part 211, which is formed by protruding outward from the outer wall of the knob 21 in a ring shape, and a second limiting part 222, which is formed by protruding outward from the end of the screw 22 near the anti-collision member 3 in a ring shape. The first limiting part 211 and the second limiting part 222 are spaced 23 apart in the axial direction. The inner wall of the mounting hole 31 of the anti-collision member 3 has a limiting protrusion 312 protruding inward. The limiting protrusion 312 is movably engaged in the gap 23 between the first limiting part 211 and the second limiting part 222. By the limiting protrusion 312 being movably engaged between the first limiting part 211 and the second limiting part 222, the anti-collision member 3 will not rotate with the knob 21 and the screw 22 while the adjusting component 2 drives it to move axially, thus enhancing the stability of the axial connection structure and the anti-collision member 3.

[0041] See Figure 2 The outer diameter of the second limiting part 222 is larger than the diameter of the screw hole 11. When the anti-collision member 3 is adjusted to be closest to the base 1, the second limiting part 222 abuts against the base 1 at the periphery of the outer opening of the screw hole 11. The abutment between the second limiting part 222 and the screw hole 11 prevents the user from continuing to rotate the adjustment component 2 inward, thus avoiding the inner side of the anti-collision member 3 from being squeezed against the base 1 and the end of the screw 22 away from the anti-collision member 3 from being squeezed against the child seat a, thereby preventing damage to the child seat a and the anti-collision member 3 when the user adjusts inward.

[0042] See Figure 3The screw 22 has an axially protruding annular connecting portion 223 at its connection with the knob 21. The connecting portion 223 is located between the first limiting portion 211 and the second limiting portion 222. A gap 311 is provided between the connecting portion 223 and the limiting protrusion 312 to allow the adjusting component 2 to rotate relative to the anti-collision member 3. The gap 311 prevents the connecting portion 223 from making circumferential contact and friction with the limiting protrusion 312 during rotation, thereby preventing the adjusting component 2 from driving the anti-collision member 3 to rotate together.

[0043] See Figure 4 The anti-collision member 3 has a radial limiting structure 32 that protrudes axially from the periphery of the opening of the mounting hole 31. The first limiting part 211 and the second limiting part 222 are engaged with the radial limiting structure 32 to limit the movement of the knob 21 and the screw 22 along the thread in the screw hole 11. This ensures that the relative position of the adjusting component 2 and the anti-collision member 3 in the radial direction remains unchanged during the rotation adjustment process. The radial limiting structure 32 can restrict the movement of the anti-collision member 3 relative to the knob 21 in the radial direction, further stabilizing the center of gravity of the anti-collision member 3 and ensuring that the anti-collision member 3 does not shift radially during the rotation adjustment process.

[0044] The radial limiting structure 32 includes a first limiting ring 321 and a second limiting ring 322. The first limiting ring 321 is formed by the anti-collision member 3 protruding axially outward from the periphery of the mounting hole 31 opening. The inner diameter of the first limiting ring 321 matches the outer diameter of the first limiting portion 211, and the outer edge of the first limiting portion 211 abuts against the inner wall of the first limiting ring 321. The second limiting ring 322 is formed by the anti-collision member 3 protruding axially inward from the periphery of the mounting hole 31 opening. The inner diameter of the second limiting ring 322 matches the outer diameter of the second limiting portion 222, and the outer edge of the second limiting portion 222 abuts against the inner wall of the second limiting ring 322. The first limiting ring 321 radially limits the first limiting portion 211, and the second limiting ring 322 radially limits the second limiting portion 222, thereby restricting the radial movement of the axial limiting structure.

[0045] The anti-collision component 3 has a guide post 33 axially arranged near the inner side of the base 1. The base 1 has a guide hole 12 corresponding to the guide post 33. The guide post 33 and the guide hole 12 are adapted to and slidably engaged. The engagement of the guide post 33 and the guide hole 12 stabilizes the translational trajectory of the anti-collision component 33, stabilizes the axial translational movement of the anti-collision component 3, and further prevents the anti-collision component 3 from rotating together with the adjustment component 2.

[0046] To prevent the user from unscrewing the screw 22 when adjusting the anti-collision component 3 outwards, a third limiting part 224 is formed by circumferentially protruding outwards from the other end of the screw 22 near the anti-collision component 3. The outer diameter of the third limiting part 224 is larger than the diameter of the screw hole 11. When the anti-collision component 3 is adjusted to the state of being furthest from the base 1, the third limiting part 224 abuts against the base 1 at the periphery of the inner opening of the screw hole 11. When the third limiting part 224 abuts against the base 1 at the periphery of the inner opening of the screw hole 11, the user cannot continue to turn the knob 21 outwards, thus preventing the screw 22 from disengaging from the screw hole 11.

[0047] The knob 21 has a first connecting hole 212, and the screw 22 has a second connecting hole 225 that communicates with the first connecting hole 212. A fastener 4 is inserted at the connection between the first connecting hole 212 and the second connecting hole 225. The fastener 4 fixes the knob 21 and the first connecting hole 212 to the first connecting hole so that the two can rotate synchronously.

[0048] The side impact protection device of the car child safety seat in this embodiment can perform the following actions:

[0049] 1) Outward adjustment: When the user rotates knob 21 outward, screw 22 moves outward along the internal thread of screw hole 11. The axial limiting structure drives the anti-collision component 3 to move away from base 1. The gap 311 allows the adjusting component 2 to rotate independently relative to the anti-collision component 3 without driving the anti-collision component 3 to rotate. The guide post 33 cooperates with the guide hole 12 to further restrict the movement trajectory of the anti-collision component 3. This allows it to only move axially until the outer surface of the anti-collision component 3 protrudes relative to the side of the safety seat a. In this way, in the event of a side collision, the anti-collision component 3 can collide with the vehicle body before the safety seat a, thereby reducing the impact force on the child.

[0050] 2) Inward adjustment: The user turns the knob 21 inward, and the screw 22 moves inward along the internal thread of the screw hole 11. The axial limiting structure drives the anti-collision part 3 to move closer to the base 1 until the second limiting part 222 abuts against the periphery of the outer opening of the screw hole 11, thereby retracting the anti-collision part 3.

[0051] Example 2: A child safety seat

[0052] See Figure 7The child safety seat of this embodiment includes a seat body 1'. The outer surface of the seat body 1' is provided with the side impact protection device of Embodiment 1. The outer surface of the seat body 1' is recessed with a mounting groove 11'. The side impact protection device is fixedly connected to the bottom of the mounting groove 11'. The groove wall of the mounting groove 11' is adapted to the shape of the anti-collision member 3 and can accommodate the anti-collision member 3. When the anti-collision member 3 is adjusted to be closest to the base 1, the anti-collision member 3 is retracted into the mounting groove 11'. When the user adjusts the anti-collision member 3 outward, because the shape of the mounting groove 11' is adapted to the anti-collision member 3, the groove wall of the mounting groove 11' also has a limiting effect on the rotational movement of the anti-collision member 3, further stabilizing the axial translational movement of the anti-collision member 3.

Claims

1. A side impact protection device of a child safety seat for a vehicle, which is installed on the outer side surface of a safety seat (a) and comprises: a base (1) fixedly connected with the safety seat (a); an adjusting assembly (2) movably arranged in the base (1); and an impact protection member (3) arranged on the base (1) by the adjusting assembly (2) and capable of adjusting the distance between the impact protection member (3) and the base (1) by the adjusting assembly (2) and further adjusting the distance between the impact protection member (3) and the outer side surface of the safety seat (a); characterized in that: the adjusting assembly (2) comprises a knob (21) for applying an external force and a screw rod (22) fixedly connected with the knob (21), the base (1) is provided with a screw hole (11) threadedly matched with the screw rod (22), and the knob (21) is capable of driving the screw rod (22) to rotate along the thread in the screw hole (11); the impact protection member (3) is provided with a mounting hole (31), the adjusting assembly (2) is movably arranged in the mounting hole (31), and an axial limiting structure is arranged between the impact protection member (3) and the adjusting assembly (2) so that the adjusting assembly (2) drives the impact protection member (3) to axially translate outwardly or inwardly during the rotation of the knob (21) driven by an external force and the rotation of the screw rod (22) along the thread in the screw hole (11), and further drives the impact protection member (3) to axially move away from or close to the base (1). The axial limiting structure comprises: a first limiting portion (211) arranged in a ring shape and formed by the outwardly protruding of the outer side wall of the knob (21) in a circumferential direction; and a second limiting portion (222) arranged in a ring shape and formed by the outwardly protruding of one end of the screw rod (22) close to the impact protection member (3) in a circumferential direction; the first limiting portion (211) and the second limiting portion (222) are spaced apart in an axial direction, and a limiting protrusion (312) is formed on the inner wall of the mounting hole (31) of the impact protection member (3) and movably arranged in the space (23) between the first limiting portion (211) and the second limiting portion (222). The outer diameter of the second limiting portion (222) is greater than the hole diameter of the screw hole (11), and in the state that the impact protection member (3) is adjusted to be closest to the base (1), the second limiting portion (222) abuts against the base (1) at the opening peripheral edge of the screw hole (11) on the outer side. The screw rod (22) is axially protruded at the connection with the knob (21) to form a ring-shaped connecting portion (223), the connecting portion (223) is located between the first limiting portion (211) and the second limiting portion (222), and a gap (311) is formed between the connecting portion (223) and the limiting protrusion (312) for the rotational movement of the adjusting assembly (2) relative to the impact protection member (3). ​ ​ ​ 2. A side impact protection device according to claim 1, characterized in that ​ ​ ​ 3. A side impact protection device according to claim 2, characterized in that: ​ 4. A side impact protection device according to claim 2, characterized in that: ​ 5. A side impact protection device according to any one of claims 2 to 4, characterized in that: The anti-collision piece (3) is axially protruded at the periphery of the opening of the mounting hole (31) to form a radial limiting structure (32), the first limiting portion (211) and the second limiting portion (222) are in limiting cooperation with the radial limiting structure (32), so that the relative position of the adjusting assembly (2) and the anti-collision piece (3) in the radial direction remains unchanged during the rotation of the knob (21) and the rotation of the screw rod (22) along the thread in the screw hole (11) driven by the external force.

6. A side impact protection device according to claim 5, characterized in that The radial limiting structure (32) comprises: A first limiting protruding ring (321) is formed by the anti-collision piece (3) being axially protruded outward at the periphery of the opening of the mounting hole (31), the inner diameter of the first limiting protruding ring (321) is matched with the outer diameter of the first limiting portion (211), and the outer edge of the first limiting portion (211) is in abutment with the inner wall of the first limiting protruding ring (321); A second limiting protruding ring (322) is formed by the anti-collision piece (3) being axially protruded inward at the periphery of the opening of the mounting hole (31), the inner diameter of the second limiting protruding ring (322) is matched with the outer diameter of the second limiting portion (222), and the outer edge of the second limiting portion (222) is in abutment with the inner wall of the second limiting protruding ring (322).

7. A side impact protection device according to any one of claims 1 to 4, characterized in that: The anti-collision piece (3) is axially arranged near the inner side of the base (1), the base (1) is provided with a guide hole (12) corresponding to the guide column (33), and the guide column (33) is adapted and slidably fitted with the guide hole (12).

8. A side impact protection device according to any one of claims 1 to 4, characterized in that: The screw rod (22) is protruded outward in the circumferential direction at the other end of the anti-collision piece (3) to form a third limiting portion (224), the outer diameter of the third limiting portion (224) is greater than the diameter of the screw hole (11), and in the state that the anti-collision piece (3) is adjusted to be farthest away from the base (1), the third limiting portion (224) is in abutment with the base (1) at the opening periphery of the screw hole (11) on the inner side.

9. A side impact protection device according to any one of claims 1 to 4, characterized in that: A first connecting hole (212) is formed in the knob (21), a second connecting hole (225) is formed in the screw rod (22) and communicates with the first connecting hole (212), a fastener (4) is arranged at the communication position of the first connecting hole (212) and the second connecting hole (225), and the fastener (4) fixedly connects the knob (21) and the connecting hole (212) to enable the two to rotate synchronously.

10. A child safety seat comprising a seat body (1') characterised in that: The outer side surface of the seat body (1') is provided with the side impact protection device according to any one of claims 1-9, the outer side surface of the seat body (1') is recessed to form a mounting groove (11'), and the side impact protection device is fixedly connected with the groove bottom of the mounting groove (11'); and the groove wall of the mounting groove (11') is adapted to the shape of the anti-collision piece (3).

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