Buckle device and child car seat

Abstract

This invention discloses a buckle device and a child car seat. The buckle device includes: an airbag housing having a receiving cavity; a buckle seat disposed on or part of the airbag housing, the buckle seat being detachably connected to a buckle connector configured to connect to a child car seat seat belt; an airbag having a contracted state housed within the receiving cavity and an inflated state at least partially protruding outside the receiving cavity; and a movable cover movably disposed on the airbag housing. The airbag housing has an opening exposing the receiving cavity; when the airbag is in the contracted state, the movable cover covers the opening; when the airbag is in the inflated state, at least a portion of the movable cover leaves the opening, the opening is exposed, and a portion of the airbag protrudes from the opening. This invention provides good impact cushioning and support even when the airbag is not deployed, further improving child safety.

Description

Technical Field

[0001] This invention belongs to the field of child car seats, and relates to a buckle device and a child car seat. Background Technology

[0002] A child car seat is a seat specifically designed for children to be installed in a car to improve their safety while traveling. Currently, child car seats have become an essential item for children traveling in cars, effectively protecting children's safety and meeting their comfort needs during the journey. In use, the child car seat is secured to the car seat, and the child can sit in it and be restrained by the seatbelt. However, in the event of a collision, due to the inertial force caused by the powerful impact, the child's upper body may still be thrown forward, potentially hitting the front seat and causing injury.

[0003] Some child car seats integrate airbag devices into the buckle. When the car is moving normally, the airbag device is in a contracted state and housed in an airbag box near the buckle. In the event of a collision, the airbag inflates above the buckle to block the child's front body and prevent them from hitting the front seat. However, in this design, when the airbag is not deployed, the opening in the airbag box that allows the airbag to inflate and expand to the outside remains open, making it difficult to protect the internal components such as the airbag itself.

[0004] The information disclosed in the background section is only intended to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] This invention relates to a buckle device and a child car seat that provides better impact cushioning and support when the airbag is not deployed, thereby further improving safety.

[0006] The present invention adopts the following technical solution: A latching device, comprising: An airbag box, which has a receiving cavity; A buckle seat, which is disposed on or is part of the airbag housing, the buckle seat being detachably connected to a buckle connector configured to connect to the seat belt of a child car seat; An airbag having a contracted state housed within the receiving cavity and an inflated state at least partially bulging out of the receiving cavity; A movable cover, which is movably disposed within the airbag box; The airbag box has an opening that exposes the receiving cavity; when the airbag is in a contracted state, the movable cover covers the opening; when the airbag is in an inflated state, at least a portion of the movable cover leaves the opening, the opening is exposed, and a portion of the airbag bulges out from the opening.

[0007] In a preferred embodiment, the movable cover includes a cover plate disposed at the opening, a cushioning pad disposed on the cover plate, and the cover plate is capable of sliding as a whole in a direction perpendicular to the direction of the opening of the airbag box.

[0008] In a more preferred embodiment, the movable cover has a push portion capable of contacting the airbag, the push portion being pushed by the airbag during inflation to cause at least a portion of the cover to leave the opening.

[0009] In a more preferred embodiment, the movable cover further includes a rotating member, a first end of which is rotatably connected to the airbag box, the cover plate is disposed at a second end of the rotating member away from the first end, and the pushing part is disposed on the rotating member.

[0010] In a more preferred embodiment, the rotating member is located inside the airbag box, the second end of the rotating member is higher than the first end, the airbag box has an outer wall defining a portion of the boundary of the receiving cavity, the rotating member is rotatably mounted on the side of the outer wall facing the receiving cavity; and in the contracted state, the distance between the second end and the outer wall is greater than the distance between the first end and the outer wall, and in the inflated state, the second end and the outer wall approach each other.

[0011] In a further preferred embodiment, in the inflated state, the outer wall is provided with a limiting portion on the side facing the receiving cavity, which abuts against the rotating member to limit the rotation angle of the rotating member; The limiting part is located near the first end; or the limiting part is located near the second end, and after the rotating part abuts against the limiting part, the rotating part as a whole fits against the outer wall.

[0012] In a further preferred embodiment, in the retracted state, the cover plate has a first side relatively close to the outer wall and a second side relatively far from the outer wall, the first side being located relative to the edge of the opening and the second side being located relative to the middle of the opening; The second end of the rotating component is fixedly connected to the portion of the cover plate near the second side; or, the second end of the rotating component is fixed to the second side of the cover plate so that the cover plate is located on the same side as the rotating component.

[0013] In a further preferred embodiment, the airbag box has an inner wall disposed opposite to the outer wall, the outer wall and the inner wall being located on opposite sides of the receiving cavity. After being installed in a child car seat, the inner wall and the outer wall of the airbag box are arranged along the front-rear direction of the child car seat, and the outer wall is located in front of the inner wall.

[0014] In a further preferred embodiment, the airbag seat also has a cushioning pad that at least covers the surface of the cover plate.

[0015] In a more preferred embodiment, the outer wall is located on the front side of the rotating member and extends longitudinally.

[0016] In a more preferred embodiment, the airbag box is provided with or connected to an inner limiting member, and when the airbag is in the contracted state, the inner limiting member abuts against the rotating member so that the cover plate is maintained in the position of blocking the opening.

[0017] In a preferred embodiment, the opening is located at the top of the airbag box, and a cushioning pad is provided on the top surface of the movable cover.

[0018] In a more preferred embodiment, the airbag box has a guide ramp or the airbag box is provided with a guide block having a guide ramp, the guide ramp and the airbag are in contact and engaged, the guide ramp extends obliquely and is configured to guide the airbag to bulge out of the opening in a direction away from the child's face.

[0019] In a further preferred embodiment, the guide ramp extends in a manner that gradually slopes forward from bottom to top, so that the airbag bulges out of the opening in a forward and upward direction when inflated.

[0020] In a further preferred embodiment, the airbag is located between the guide ramp and the movable cover in the contracted state.

[0021] In a preferred embodiment, the airbag housing is covered with a protective sleeve that covers the rear side of the airbag housing facing the child.

[0022] In a preferred embodiment, the buckle seat is configured to be attached to the seat body of a child car seat via a cross-belt, the buckle seat being located on the front or rear side of the airbag box and spaced apart from the airbag box.

[0023] In an optional embodiment, the buckle seat is disposed on the side of the airbag box facing the child car seat carrying space, or the buckle seat is disposed on the side of the airbag box away from the carrying space, or the buckle seat is disposed on the left and right sides of the airbag box.

[0024] In a preferred embodiment, the airbag box includes an outer limiting member located outside the movable cover. When the airbag is in the inflated state, the movable cover abuts against the outer limiting member to support the airbag and keep it positioned directly in front of the child.

[0025] In a more preferred embodiment, the outer limiting member is located on the front side of the movable cover.

[0026] The present invention also adopts the following technical solution: A child car seat includes a seat body, and the child car seat also includes the aforementioned buckle device. The seat body has a support space, and the buckle device is disposed at the front of the support space.

[0027] In a preferred embodiment, the bottom of the airbag box is rotatably connected to the seat body.

[0028] In a more preferred embodiment, the buckle seat is connected to a lap belt, and the bottom end of the lap belt and the bottom end of the airbag box are connected to the seat body via a pivot.

[0029] The present invention adopts the above solution and has the following advantages: The buckle device of the present invention integrates an airbag box on the buckle seat, and a movable cover is movably disposed on the airbag box; when the airbag is inflated, the movable cover at least partially leaves the opening, the opening is exposed, and the airbag bulges out from the buckle; when the airbag is not in use, the movable cover blocks the opening, which plays a role in impact buffering protection and support, and better protects the components in the airbag box. Attached Figure Description

[0030] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a perspective view of a child car seat according to an embodiment of the present invention, wherein the airbag is in a contracted state.

[0032] Figure 2 for Figure 1 Side view of a child car seat.

[0033] Figure 3 for Figure 1 A top view of a child car seat.

[0034] Figure 4 for Figure 3 Sectional view along the AA direction.

[0035] Figure 5 for Figure 4 A magnified view of a section at point B in the middle.

[0036] Figure 6 This is a structural diagram of a hook and loop fastener according to an embodiment of the present invention.

[0037] Figure 7 for Figure 6 An exploded view of the hook and loop fastener shown, in which the airbag and fabric cover are not shown.

[0038] Figure 8 This is a side view of a child car seat according to an embodiment of the present invention, wherein the airbag is in a deflated state.

[0039] Figure 9 for Figure 8 The image shows a cross-sectional view of a child car seat.

[0040] Figure 10 This is a front view of a hook and loop device according to an embodiment of the present invention.

[0041] Figure 11 for Figure 10 A cross-sectional view along the CC direction.

[0042] In the above attached figures, 100. Child car seat; 200. Buckle device; 300. Seat body; 1. Airbag box; 10. Rotating shaft; 11. Opening; 12. Outer wall; 121. Limiting part; 13. Sheath; 131. Slot; 14. Receiving cavity; 15. Inner wall; 2. Hook and loop seat; 21. Hook and loop connector; 22. Crotch harness; 3. Airbags; 4. Movable cover; 41. Cover plate; 411. First side; 412. Second side; 42. Rotating component; 421. Pushing part; 422. Pivot; 5. Cushioning pad; 6. Guide block; 61. Guide ramp; 62. Hanging lug; 7. Gas cylinders; 8. Cloth cover. Detailed Implementation

[0043] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is for the purpose of aiding understanding the present invention, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] In this document, the terms “up,” “down,” “left,” “right,” “front,” and “rear,” etc., which indicate orientation or positional relationship, are defined based on the perspective of a child in a child car seat and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] Figures 1 to 11 The diagrams are drawn to scale. To keep the instructions concise, the proportions of each component are not listed individually. However, the proportions and positions of each component should be considered part of the contents of this instruction manual.

[0046] Reference Figures 1 to 11 As shown, this embodiment illustrates a child car seat 100 and its buckle device 200. The child car seat 100 can be installed on a car seat for a child to ride in. The buckle device 200 is a component of the child car seat 100 and, together with the shoulder seat belt, constitutes a restraint system for the child. In this embodiment, the buckle device 200 also integrates an airbag to further enhance safety and provide safety protection for the child within the carrying space of the child car seat 100. The buckle device 200 is located at the front of the carrying space.

[0047] Combination Figures 4 to 7 As shown, the buckle device 200 includes: an airbag housing 1, a buckle seat 2, an airbag 3, a movable cover 4, and a cushioning pad 5. The airbag housing 1 is made of a rigid material and has an internal receiving cavity 14. The buckle seat 2 is disposed on or is part of the airbag housing 1. For example, the buckle seat 2 can be disposed on the front or rear side of the airbag housing 1 and spaced apart from it. Further, the buckle seat 2 can be disposed on the side of the airbag housing 1 facing the child car seat's carrying space, or on the side of the airbag housing facing away from the carrying space, or on the left or right sides of the airbag seat 1. In this embodiment, the buckle seat 2 is fixed to the front of the airbag housing 1. The buckle seat 2 can be detachably connected to the buckle connector 21, which is configured to connect to the seat belt of the child car seat 100 (not shown in the figure).

[0048] Specifically, the buckle seat 2 has two holes on the left and right. The child car seat 100 has two shoulder safety belts, each with a buckle connector 21. Each buckle connector 21 can be inserted into the hole of the buckle seat 2 and can be pulled out of the hole after unlocking. The buckle seat 2 is connected to a lap belt 22, which is connected to the seat body 300 of the child car seat 100. When the buckle connector 21 of the shoulder safety belt is connected to the buckle seat 2, the two shoulder safety belts and the lap safety belt 22 together form a five-point seat belt restraint system to keep the child in the child car seat 100. At this time, the airbag box 1 and the buckle seat 2 are both located in front of the child's body. After the airbag 3 is triggered in a collision, the airbag 3 can inflate from the airbag box 1 to provide cushioning protection between the child and the back of the front or rear car seat.

[0049] The airbag 3 is made of an elastic material, capable of inflating after inflation and contracting after gas is released. In this embodiment, the airbag 3 has a contracted state housed within the receiving cavity 14 of the airbag box 1 and an inflated state at least partially protruding outside the receiving cavity 14 of the airbag box 1. The latching device 200 also includes a gas cylinder 7 for inflating the airbag 3. The gas cylinder 7 can be disposed in the airbag box 1, and the gas outlet of the gas cylinder 7 communicates with the inner cavity of the airbag 3. When a collision occurs, the gas cylinder 7 can inflate the airbag 3, causing the airbag 3 to inflate. Initially, the airbag 3 is housed in a rolled-up state within the receiving cavity 14 of the airbag box 1 and is fixedly connected to the gas cylinder 7. The assembly method of the airbag 3 and the airbag box 1 can be found in the applicant's patent CN115384366A.

[0050] A movable cover 4 is movably mounted on the airbag housing 1. A cushioning pad 5, made of flexible material, is disposed on the outer surface of the movable cover 4. The airbag housing 1 has an opening 11 that communicates with and exposes a receiving cavity 14. The movable cover 4 and the opening 11 cooperate with each other. When the airbag 3 is in the contracted state, the movable cover 4 covers the opening 11. When the airbag 3 is in the inflated state, at least a portion of the movable cover 4 leaves the opening 11, exposing the opening 11, and a portion of the airbag 3 bulges out from the opening 11.

[0051] The opening 11 can be located at the top of the airbag box 1, and the cushioning pad 5 is located on the top surface of the movable cover 4. In the initial state before the airbag 3 is inflated, the opening 11 is blocked by the movable cover 4 and the cushioning pad 5, which can prevent children from directly hitting the top of the hard airbag box 1, providing a shock-absorbing effect and a supporting function, thus better protecting children; it can also prevent direct collision with the internal components such as the airbag 3 inside the airbag box 1.

[0052] In this embodiment, the movable cover 4 is rotatably connected to the airbag box 1. In other embodiments, the movable cover 4 can be movably disposed on the airbag box 1 in other connection methods, such as a sliding fit connection. Further, the movable cover 4 includes a cover plate 41, which is disposed at the opening 11. The cover plate 11 slides along a direction perpendicular to the opening of the airbag box 1. Here, "the opening direction of the airbag box 1" refers to the orientation of the opening 11 of the airbag box 1. If the opening 11 is opened on a certain surface of the airbag box 1, then the opening direction of the airbag box 1 is the normal direction of that surface. For example, in the embodiment shown in the figure, the opening 11 is opened on the upper surface of the airbag box 1, then the opening direction of the airbag box 1 is the normal direction of the upper surface of the airbag box 1.

[0053] The buffer pad 5 is fixed to the cover plate 41. The movable cover 4 also includes a rotating member 42, the first end (lower end) of which is rotatably connected to the airbag box 1, and the cover plate 41 is disposed at the second end (upper end) of the rotating member 42, away from the first end. The rotating member 42 is located inside the airbag box 1, the second end of which is higher than the first end, and the cover plate 41 extends laterally from the second end. The cover plate 41 and the rotating member 42 are integral, and the rotating member 42 is a single integral part. Specifically, the first end of the rotating member 42 is rotatably connected to the inner wall of the airbag box 1 via a pivot 422, and the cover plate 41 extends forward from the second end of the rotating member 42. The axis of the pivot 422 can extend along the left-right direction of the child car seat 100, and the cover plate 41 can move forward or backward when the rotating member 42 rotates. In other embodiments, the cover plate 41 can also extend to the left or right from the second end of the rotating member 42.

[0054] The movable cover 4 has a pushing part 421 that can contact the airbag 3. The pushing part 421 is configured to be pushed by the airbag 3 during inflation, so that at least a portion of the cover 41 leaves the opening 11. Therefore, during inflation, the airbag 3 automatically pushes the movable cover 4 to move, exposing the opening 11. Specifically, the pushing part 421 is provided on the rotating member 42. In this embodiment, the pushing part 421 is formed at the rear of the rotating member 42, that is, the pushing part 421 faces the rear, and the airbag 3 is located at the rear of the pushing part 421. When the airbag 3 inflates, it presses the pushing part 421 forward, causing the rotating member 42 to rotate forward, and the cover 41 moves forward accordingly, exposing the opening 11.

[0055] The airbag box 1 includes an outer limiting member located outside the movable cover 4. When the airbag 3 is inflated, the movable cover 4 abuts against the outer limiting member to support the airbag 3 and maintain it in a position directly in front of the child. The outer limiting member may be located on the front side of the movable cover 4. Further, the airbag box 1 has an outer wall 12 located outside the rotating member 42. This limiting wall 12 defines a portion of the boundary of the receiving cavity 14 of the airbag box 1, and the outer wall 12 constitutes the outer limiting member. The rotating member 42 is rotatably mounted on the side of the outer wall 12 facing the receiving cavity 14 (inner side). In the contracted state, the distance between the second end and the outer wall 12 is greater than the distance between the first end and the outer wall 12. In the inflated state, the second end moves closer to the outer wall 12. After the airbag 3 is switched to the inflated state, the rotating member 42 abuts against the outer wall 12 to support the airbag 3. In the inflated state, the side of the outer wall 12 facing the receiving cavity 14 is provided with a limiting portion 121 that abuts against the rotating member 42 to limit the rotation angle of the rotating member 42. In some embodiments, the limiting part 121 is disposed near the first end. In this embodiment, the limiting part 121 is disposed near the second end, and after the rotating member 42 abuts against the limiting part 121, the rotating member 42 is in contact with the outer wall 12.

[0056] Specifically, in this embodiment, the outer wall 12 is located in front of the rotating member 42. When the rotating member 42 is pushed forward to contact the outer wall 12, the cover plate 41 and the rotating member 42 stop moving, thus providing front support for the airbag 3 and preventing the airbag 3 from collapsing in front of the airbag box 1 and the buckle seat 2. Furthermore, the outer wall 12 extends longitudinally. When the rotating member 42 abuts against the outer wall 12, the pushing part 421 on the rotating member 42 also extends substantially longitudinally, thereby keeping the airbag 3 upright. The airbag 3 can extend upward to the front of the child (especially the head), providing better cushioning between the child's head and the front seat (forward-facing installation of the child car seat 100) or the rear seat back (rear-facing installation of the child car seat 100). Here, "longitudinal" refers to the direction of gravity or a direction within approximately 30 degrees (more preferably 10 degrees) of the direction of gravity. Correspondingly, "lateral" refers to the horizontal direction or a direction within approximately 30 degrees (more preferably 10 degrees) of the horizontal direction.

[0057] In the retracted state, the cover plate 41 has a first side 411 relatively close to the outer wall 12 and a second side 412 relatively far from the outer wall 12. The first side 411 is located relative to the edge of the opening 11, and the second side 412 is located relative to the middle of the opening 11. The second end of the rotating member 42 is fixedly connected to the cover plate 41 near the second side 412. Further, the second end of the rotating member 42 is fixed to the second side 412 of the cover plate 42 so that the entire cover plate 41 is located on the same side of the rotating member 42.

[0058] The airbag housing 1 has an inner wall 15 disposed opposite to the outer wall 12. The outer wall 12 and the inner wall 15 are located on opposite sides of the receiving cavity 14. After being installed in a child car seat, the inner wall 15 and the outer wall 12 of the airbag housing 1 are arranged opposite each other along the front-rear direction of the child car seat, and the outer wall 12 is located in front of the inner wall 15. Figure 6 As shown. The buckle module 200 includes a sheath 13 that covers the rear side of the airbag box 1 facing the child, and a rear wall 15 is secured to the front side of the sheath 13. The sheath 13 includes a flexible material that provides cushioning between the child's abdomen and the rigid airbag box 1.

[0059] An inner limiting member may also be provided or connected to the airbag box 1. When the airbag 3 is in the contracted state, the inner limiting member abuts against the rotating member 42 to prevent the rotating member 42 from rotating excessively toward the airbag 3 (not shown in the figure), thus avoiding compression of the airbag 3 and damage to it. More importantly, the inner limiting member keeps the cover plate 41 in a position that covers the opening 11, keeping the opening 11 closed. The buffer pad 5 on the cover plate 41 provides impact cushioning protection and support. For example, the inner limiting member may be provided inside the airbag box 1 (e.g., on the inner wall) and located behind the rotating member 42. When the airbag 3 is in the contracted state, the inner limiting member abuts against the rear surface of the rotating member 42, preventing the rotating member 42 and the cover plate 41 from moving forward. The inner limiting component can also be a torsion spring fitted on the pivot 422. One end of the torsion spring abuts against the rear surface of the rotating component 42, and the other end abuts against the airbag box 1. When the airbag 3 is in the contracted state, the elastic force of the torsion spring prevents the rotating component 42 and the cover plate 41 from moving forward.

[0060] The airbag housing 1 has a guide ramp 61, or a guide block 6 with a guide ramp 61 is provided inside the airbag housing 1. The guide ramp 61 contacts and engages with the airbag 3, and the guide ramp 61 extends obliquely and is configured to guide the airbag 3 to bulge out of the opening 11 in a direction away from the child's face. The guide ramp 61 may be located on the rear, left, or right side of the airbag 3, and the airbag 3 is below the guide ramp 61 when it is in the contracted state. The guide ramp 61 is located adjacent to the opening 11 and is below the opening 11. In this embodiment, the guide ramp 61 is located on the rear side of the airbag 3, and the guide ramp 61 is inclined downward and backward from the opening 11. The guide ramp 61 is located on the guide block 6, the guide block 6 is located on the rear side of the opening 11, and the guide block 6 is located adjacent to or fixed to the rear wall 15. Specifically, the left and right sides of the sheath 13 are provided with slots 131, and the two sides of the guide block 6 have outwardly extending lugs 62. The lugs 62 are inserted into the slots 131 to connect the guide block 6 to the sheath 13. Figure 7 As shown. The rear wall 15 is located between the sheath 13 and the guide block 6, and the rear wall 15 is sandwiched between the sheath 13 and the guide block 6.

[0061] Furthermore, the guide ramp 61 extends in a manner that gradually slopes forward from bottom to top, so that the airbag 3 expands out of the opening 11 in a forward and upward direction when inflated. In this embodiment, the guide block 6 is fixed inside the airbag box 1 and is located at the top of the receiving cavity 14 of the airbag box 1, adjacent to the opening 11, specifically close to or fixed to the inner wall 15. The guide ramp 61 extends downward and rearward from the rear side of the opening 11 until it reaches the rear wall 15.

[0062] When in the deflated state, the airbag 3 is located between the guide ramp 61 and the movable cover 4. When the airbag 3 inflates, it expands obliquely forward and upward under the guidance of the guide ramp 61, while pushing the movable cover 4 forward to expose the opening 11. The inflated airbag 3 extends from the opening 11 to the front of the child to provide cushioning protection.

[0063] The airbag housing 1 is covered by a sheath 13, which covers the rear side of the airbag housing 1 facing the child. The sheath 13 is made of a flexible material that provides cushioning between the child's abdomen and the rigid airbag housing 1.

[0064] The fastening device 200 also includes a flexible fabric cover 8, formed by sewing together fabric. When the airbag 3 is in the contracted state, the airbag 3 covers the outside of the airbag box 1, the protective sleeve 13, and the cushioning pad 5. When the airbag 3 is inflated, the airbag 3 can be pushed out to the outside of the fabric cover 8.

[0065] The child car seat 100 of this embodiment includes a seat body 300 and the aforementioned buckle device 200. The seat body 300 has a carrying space, and an airbag box 1 is disposed at the front of the carrying space. The bottom of the airbag box 1 is rotatably connected to the seat body 300. Further, a lap belt 2 is connected to the buckle seat 2, and the bottom end of the lap belt 22 and the bottom end of the airbag box 1 are rotatably connected to the seat body 300 via a pivot 10. The axis of the pivot 10 extends along the left-right direction of the child car seat 100, and the airbag box 1 and the buckle seat 2 can be flipped back and forth relative to the seat body 300. The seat body 300 may include a base, a seat, and support legs, etc.

[0066] When a collision occurs, the trigger point of airbag 3 is reached, and air cylinder 7 begins to rapidly inflate airbag 3. Airbag 3 inflates and deploys rapidly to protect the child inside the child car seat 100. During the deployment of airbag 3, the deployment direction of airbag 3 is controlled by the angle of guide ramp 61 (e.g., Figure 9(As indicated by arrow A) to prevent the airbag 3 from deploying directly into the child's face and causing injury, during the inflation and deployment of the airbag 3, the movable cover 4 and the buffer pad 5 rotate clockwise to a predetermined position (a position that can abut against the outer wall 12) after being subjected to force. The rotated movable cover 4 and buffer pad 5 then support the airbag 3, allowing it to better protect the child. When the child car seat 100 is in normal use (the airbag 3 is not triggered as its trigger point has not been reached), the movable cover 4 and buffer pad 5 are in their initial positions, with a limit relative to the airbag housing 1 (abutting against the inner limit member). In this state, if a collision occurs, the buffer pad 5 can provide protection and support. The buckle device 200 and the child car seat 100 of the embodiments have the following advantages: 1. The buckle device 200 is equipped with a guide slope 61. When the airbag 3 is triggered to inflate, the angle of the guide slope 61 is used to control the direction of the airbag 3 to pop out, so as to prevent the airbag 3 from popping out directly towards the child's face and causing facial injury to the child.

[0067] 2. The buckle device 200 is equipped with an outer wall 12 that cooperates with the rotating part 42. After the airbag 3 is inflated and deployed due to an impact, the outer wall 12 keeps the moving part and the buffer pad 5 in a generally vertical position, which supports the airbag 3 and prevents the airbag 3 from collapsing downwards towards the front of the buckle, thus better protecting the child's safety.

[0068] 3. Before the airbag 3 is triggered, the opening 11 is covered by the cover plate 41. The cover plate 41 acts as an impact buffer, protecting the airbag 3 and other components inside the airbag box 1. In the event of a minor collision, the cushioning pad 5 on the top of the airbag box 1 also acts as an impact buffer and support, protecting the child's safety.

[0069] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. In the event of any contradiction or inconsistency between the definitions used herein and those contained in other published documents, the definitions used herein shall prevail.

[0071] It should also be noted that "rotational connection" in the above embodiments refers to pivot connection, unless the context clearly indicates other rotational connection methods.

[0072] As indicated in this specification and claims, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0073] It can be further understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "one," "," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0074] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0075] The above embodiments are only for illustrating the technical concept and features of the present invention, and are preferred embodiments. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection of the present invention.

Claims

1. A fastening device, characterized in that include: An airbag box, which has a receiving cavity; A buckle seat, which is disposed on or is part of the airbag housing, the buckle seat being detachably connected to a buckle connector configured to connect to the seat belt of a child car seat; An airbag having a contracted state housed within the receiving cavity and an inflated state at least partially bulging out of the receiving cavity; A movable cover, which is movably disposed within the airbag box; The airbag box has an opening that exposes the receiving cavity; when the airbag is in a contracted state, the movable cover covers the opening; when the airbag is in an inflated state, at least a portion of the movable cover leaves the opening, the opening is exposed, and a portion of the airbag bulges out from the opening.

2. The clasp device of claim 1, wherein The movable cover includes a cover plate disposed at the opening, the cover plate being able to slide as a whole in one direction, which is perpendicular to the direction of the opening of the airbag box.

3. The clasp device of claim 2, wherein The movable cover has a push portion that can contact the airbag, the push portion being pushed by the airbag during the inflation of the airbag to cause at least a portion of the cover to leave the opening.

4. The latching device according to claim 3, characterized in that, The movable cover also includes a rotating component, the first end of which is rotatably connected to the airbag box, the cover plate is disposed at the second end of the rotating component away from the first end, and the pushing part is disposed on the rotating component.

5. The latching device according to claim 4, characterized in that, The rotating member is located inside the airbag box, with the second end of the rotating member being higher than the first end. The airbag box has an outer wall defining a portion of the boundary of the receiving cavity. The rotating member is rotatably mounted on the side of the outer wall facing the receiving cavity. In the contracted state, the distance between the second end and the outer wall is greater than the distance between the first end and the outer wall. In the inflated state, the second end and the outer wall approach each other.

6. The latching device according to claim 5, characterized in that, In the inflated state, a limiting part is provided on the side of the outer wall facing the receiving cavity to abut against the rotating member and limit the rotation angle of the rotating member; The limiting part is located near the first end; or the limiting part is located near the second end, and after the rotating part abuts against the limiting part, the rotating part as a whole fits against the outer wall.

7. The latching device according to claim 5, characterized in that, In the retracted state, the cover plate has a first side relatively close to the outer wall and a second side relatively far from the outer wall, the first side being located relative to the edge of the opening and the second side being located relative to the middle of the opening; The second end of the rotating component is fixedly connected to the portion of the cover plate near the second side; or, the second end of the rotating component is fixed to the second side of the cover plate so that the cover plate is located on the same side as the rotating component.

8. The latching device according to claim 5, characterized in that, The airbag box has an inner wall that is disposed opposite to the outer wall. The outer wall and the inner wall are located on opposite sides of the receiving cavity. After being installed on a child car seat, the inner wall and the outer wall of the airbag box are arranged along the front-rear direction of the child car seat, and the outer wall is located in front of the inner wall.

9. The latching device according to claim 5, characterized in that, The airbag seat also has a cushioning pad that at least covers the surface of the cover plate.

10. The latching device according to claim 5, characterized in that, The outer wall is located on the front side of the rotating member and extends longitudinally.

11. The latching device according to any one of claims 4 to 10, characterized in that, The airbag box is provided with or connected to an inner limiting member. When the airbag is in the contracted state, the inner limiting member abuts against the rotating member so that the cover plate is maintained in the position of blocking the opening.

12. The latching device according to claim 1, characterized in that, The opening is located at the top of the airbag box, and a cushioning pad is provided on the top surface of the movable cover.

13. The latching device according to claim 12, characterized in that, The airbag box has a guide slope or the airbag box is provided with a guide block having a guide slope. The guide slope and the airbag are in contact and cooperate. The guide slope extends obliquely and is configured to guide the airbag to bulge out of the opening in a direction away from the child's face.

14. The latching device according to claim 13, characterized in that, The guide ramp extends in a manner that gradually slopes forward from bottom to top, so that the airbag bulges out of the opening in a forward and upward direction when it inflates.

15. The latching device according to claim 14, characterized in that, In the contracted state, the airbag is located between the guide ramp and the movable cover.

16. The latching device according to claim 1, characterized in that, The airbag box is covered with a protective sleeve that covers the rear side of the airbag box facing the child. Alternatively, the buckle seat is configured as a seat body of a child car seat that is attached to the child car seat via a cross-belt, the buckle seat being located on the front or rear side of the airbag box and spaced apart from the airbag box; Alternatively, the buckle seat may be located on one side of the airbag housing facing the child car seat's support space, or on the side of the airbag housing away from the support space, or on both sides of the airbag housing.

17. The latching device according to any one of claims 1 to 16, characterized in that, The airbag box includes an outer limiting member located outside the movable cover. When the airbag is in the inflated state, the movable cover abuts against the outer limiting member to support the airbag and keep it positioned directly in front of the child.

18. The latching device according to claim 17, characterized in that, The outer limiting member is located on the front side of the movable cover.

19. A child car seat, comprising a seat body, characterized in that, The child car seat further includes a buckle device as described in any one of claims 1 to 18, wherein the seat body has a carrying space, and the buckle device is disposed at the front of the carrying space.

20. The child car seat according to claim 19, characterized in that, The bottom of the airbag box is rotatably connected to the seat body.

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