A child safety seat or booster cushion and its locking hook and connecting means

Abstract

The application discloses a locking hook of a child safety seat or a booster cushion, which comprises a shell, a locking rod and an unlocking assembly; an assembly end of the shell is provided with an opening; a top of the locking rod is slidably penetrated through an upper side of the opening, and a bottom end of the locking rod is slidably penetrated through a lower side of the opening; the unlocking assembly comprises an unlocking rod, a rotating shaft, a first gear, a first wheel, a connecting rod and a first elastic piece; the unlocking rod is slidably connected with an inner wall of the shell, a first end of the unlocking rod is connected with an unlocking knob, and a second end of the unlocking rod is provided with a first tooth on a bottom surface; the rotating shaft is fixedly connected with the inner wall of the shell perpendicularly to the unlocking rod; the first gear is rotatably connected with the rotating shaft and matched with the first tooth; the first wheel is rotatably connected with the rotating shaft and clamped with the first gear; a first end of the connecting rod is hinged with a first wheel edge, and a second end of the connecting rod is hinged with the locking rod; one end of the first elastic piece is connected with a top end of the locking rod, and the other end of the first elastic piece is connected with the shell. The locking hook is helpful to improve the unlocking efficiency and the stability of assembly with an ISOFIX interface.

Description

Technical Field

[0001] This application relates to the technical field of car seats, specifically to a child safety seat or booster seat and its locking hook and connecting device. Background Technology

[0002] With increasing awareness of driving safety, major companies have increased their research and development efforts on child safety seats and booster seats for passenger vehicles. The ISOFIX (International Standards Organisation FIX) interface on the rear seats of cars is a widely accepted child safety seat anchoring interface by many automakers. It allows for quick connection between the child safety seat or booster seat's hooks and the ISOFIX interface. Currently, the ISOFIX interface typically has an ISOFIX cover at the inlet end to conceal the interface when the child safety seat or booster seat is not installed, improving aesthetics. Furthermore, the size of the hooks on the child safety seat or booster seat matches the inner diameter of the ISOFIX cover. Because the ISOFIX cover is very close to the anchor wires inside the ISOFIX interface, the assembly space between the child safety seat's hooks and the ISOFIX interface is very small. In addition, the existing hooks and connecting devices on child safety seats or booster seats are complex in structure and inconvenient to operate, making it difficult to install and remove child safety seats or booster seats from car seats. Summary of the Invention

[0003] To address at least one aspect of the aforementioned problems, the present invention provides a locking hook for a child safety seat or booster seat, comprising a housing, a locking lever, and an unlocking assembly; the mounting end of the housing has a notch extending near the fixed end of the housing, and the fixed end of the housing is fixedly connected to a connector for connection with the child safety seat body or booster seat body; the top of the locking lever penetrates the upper side of the notch and is slidably connected to the housing; when the locking hook is closed, the bottom end of the locking lever abuts against or penetrates the lower side of the notch; the unlocking assembly is installed inside the housing and includes an unlocking lever, a rotating shaft, a first gear, a first wheel, a connecting rod, and a first elastic element; the extending direction of the unlocking lever is parallel to the extending direction of the housing. Similarly, the unlocking rod is slidably connected to the inner wall of the housing along the extension direction of the housing; the first end of the unlocking rod is connected to an unlocking button for driving the unlocking rod to slide; the bottom surface of the second end of the unlocking rod is provided with a first tooth along the extension direction of the unlocking rod; the rotating shaft is set perpendicular to the unlocking rod and is fixedly connected to the inner wall of the housing; the first gear is rotatably connected to the rotating shaft, and the first gear and the first tooth are engaged; the first wheel is rotatably connected to the rotating shaft, and the first gear and the first wheel are engaged; the first end of the connecting rod is hinged to the first wheel near the edge, and the second end is hinged to the locking rod near the middle; the extension direction of the first elastic element is the same as the extension direction of the locking rod, one end of the first elastic element is connected to the top of the locking rod, and the other end is connected to the inner wall of the housing.

[0004] With the above technical solution, when the lock hook needs to be unlocked, the unlocking button drives the unlocking rod to slide inside the housing. Under the action of the first tooth, the first gear rotates, thereby driving the first wheel to rotate. Through the connecting rod between the edge of the first wheel and the lock rod, the lock rod slides upward, and the first elastic element is compressed, causing the bottom end of the lock rod to leave the lower side of the notch, thus completing the unlocking. Align the lock hook with the ISOFIX interface and push it in, so that the lock rod in the unlocked state passes over the fixed steel wire in the ISOFIX interface. Release the unlocking button, and under the action of the first elastic element, the lock rod slides downward and reconnects to the lower side of the notch. The unlocking component returns to the locked state, completing the assembly of the lock hook and the ISOFIX interface. The locking hook of this application has a simple unlocking structure and is easy to operate. It can quickly unlock within a small assembly space, which facilitates the assembly and disassembly of child safety seats or booster seats with car seats. Furthermore, when the locking hook of this application is assembled with the ISOFIX interface, the bottom end of the locking bar and the lower side of the notch are closed, which restricts the fixing wire inside the ISOFIX interface between the bottom wall of the notch and the locking bar, preventing the fixing wire from falling off the locking bar and helping to improve the stability of the assembly of the locking hook of this application with the ISOFIX interface.

[0005] Preferably, the unlocking assembly further includes a second wheel, which is disposed opposite to and fixedly connected to the first wheel. The first end of the connecting rod is disposed between the first and second wheels, and the edge of the second wheel is hinged to the first end of the connecting rod. This technical solution, by designing the second wheel to be fixedly connected to the first wheel and clamping one end of the connecting rod at the edges of the first and second wheels, helps to improve the stability of the connection between the first wheel and the connecting rod, thereby improving the stability of the connecting rod's operation.

[0006] Preferably, the unlocking component further includes a limiting block, which is fixedly connected to the inner wall of the housing. The limiting block includes a first part and a second part. The first part is fixedly connected to a rotating shaft, and a first gear is installed in the first part and rotatably connected to the first part. A first sliding groove is formed in the second part, and the unlocking rod is installed in the first sliding groove and slidably connected to the first sliding groove along the extension direction of the unlocking rod. Through the above technical solution, the limiting block is designed such that its first part is rotatably connected to the first gear, and its second part is slidably connected to the unlocking rod, which helps to improve the stability of the engagement between the first tooth of the unlocking rod and the first gear.

[0007] Preferably, the outer wall of the housing is covered with a cover, the two ends of which are open. The outer contour of the cover matches the inner surface of the ISOFIX interface, and the cover snaps into the housing. Both sides of the cover at the housing assembly end have clearance openings, exposing the notch. The presence of the ISOFIX cover reduces the assembly space between the locking hook and the ISOFIX interface, making assembly difficult. By integrating the cover into the housing, when the locking hook is assembled with the ISOFIX interface, the ISOFIX cover is first removed. This increases the size of the ISOFIX interface entry end, facilitating the assembly of the locking hook with the fixing wire inside the ISOFIX interface. Furthermore, the cover conceals the gap between the outer wall of the housing and the inner wall of the ISOFIX interface, and exposes the seat structure due to the removal of the ISOFIX cover, contributing to aesthetics.

[0008] Preferably, a second sliding groove is formed on the outer wall of the housing, and the extension direction of the second sliding groove is the same as the extension direction of the housing; a first post is fixedly connected to one end of the second sliding groove near the assembly end of the housing; a second post is fixedly connected to the inner wall of the cover, the second post is installed in the second sliding groove, and is slidably connected to the second sliding groove along the extension direction of the second sliding groove; a second elastic element is provided in the second sliding groove, one end of the second elastic element is connected to the first post, and the other end is connected to the second post. With the above technical solution, when the size of the cover is larger than the size inside the ISOFIX interface, the inner wall of the ISOFIX interface will push the cover outward, while the second elastic element will pull the cover inward, so that when the locking hook is assembled with the ISOFIX interface, the pushing and pulling forces on the cover are balanced, thus accommodating the assembly of ISOFIX interfaces of different sizes.

[0009] Preferably, the connector is a flexible strip, with one end fixedly connected to the fixed end of the housing and the other end fixedly connected to the child safety seat body or booster seat body. The above technical solution discloses a specific structure for a connector. By using a flexible component to connect the housing to the child safety seat body or booster seat body, the locking hook of this application can be positioned on the outside of the child safety seat body or booster seat body. When assembly is required, the locking hook of this application can be directly assembled with the ISOFIX interface without first removing the locking hook from the child safety seat body or booster seat body, making the assembly of the locking hook with the ISOFIX interface more convenient.

[0010] This application also provides a connecting device for a child safety seat or booster seat, comprising two locking hooks of any one of the aforementioned child safety seats or booster seats and a connecting shaft, with both ends of the connecting shaft connected to unlocking buttons in the two locking hooks respectively. Through the above technical solution, by setting a connecting shaft between the two locking hooks of this application, the simultaneous unlocking of both locking hooks in the connecting device of this application is achieved, further improving the convenience of installing and removing the child safety seat or booster seat from the car seat.

[0011] Preferably, the unlocking button is a second gear, which is rotatably connected to the inner wall of the housing; the first end of the unlocking rod has a second tooth that engages with the second gear; both ends of the connecting shaft are fixedly connected to the second gears in the two locking hooks respectively. Through the above technical solution, a specific structure of the unlocking button and the specific structure of the connection between the unlocking button and the connecting shaft are disclosed. The connecting shaft enables the second gears in the two locking hooks to rotate simultaneously, and the second tooth drives the unlocking rod to run synchronously, thereby driving the locking rod to unlock synchronously, realizing the synchronous unlocking of the two locking hooks in the connecting device.

[0012] Preferably, it also includes an electric drive component, which is electrically connected to the vehicle controller; the electric drive component is connected to the connecting shaft and is used to drive the connecting shaft to move or rotate. Through the above technical solution, the vehicle controller controls the operation of the electric drive component, which drives the two locking hooks to unlock simultaneously via the connecting shaft, thereby achieving electric unlocking of the child safety seat or booster seat.

[0013] This application also provides a child safety seat or booster seat, including a connecting device for a child safety seat or booster seat as described above, and a child safety seat body or booster seat body, wherein the connectors of the two locking hooks are fixedly connected to the child safety seat body or booster seat body.

[0014] The present invention provides a child safety seat or booster seat, its locking hook, and connecting device, which have the following beneficial effects:

[0015] (1) By setting a sliding unlocking rod inside the housing, and designing a matching first tooth and a first gear at the second end of the unlocking rod, the first wheel is driven to rotate, and then the locking rod is driven to slide on the housing through a connecting rod or a first elastic element, so as to realize the connection or separation between the bottom end of the locking rod and the lower side of the notch, thus realizing the locking or unlocking of the locking hook of this application. The unlocking structure of the locking hook of this application is simple and easy to operate, and it can quickly unlock in a small assembly space, which facilitates the assembly and disassembly of child safety seats or booster seats with car seats. Furthermore, when the locking hook of this application is assembled with the ISOFIX interface, the bottom end of the locking rod and the lower side of the notch are a closed structure, which restricts the fixing wire in the ISOFIX interface between the bottom wall of the notch and the locking rod, preventing the fixing wire from falling off the locking rod, and helping to improve the stability of the assembly of the locking hook of this application with the ISOFIX interface.

[0016] (2) By designing a limiting block between the first tooth and the first gear, and a second wheel between the first wheel and the connecting rod, the stability of the connection between the first tooth and the first gear and the first wheel and the connecting rod are improved respectively, thereby ensuring the stability of the unlocking component in the lock hook of this application.

[0017] (3) By designing a cover on the outer wall of the housing, the ISOFIX cover can be removed when the lock hook of this application is assembled with the ISOFIX interface. This not only helps to improve the convenience of assembling the lock hook of this application with the ISOFIX interface, but also ensures the aesthetics and stability of the lock hook of this application after assembly with the ISOFIX interface. Furthermore, a second post is designed on the inner wall of the cover, a second sliding groove is designed on the outer wall of the housing, and a second elastic element and a first post are designed in the second sliding groove, so that the lock hook of this application can be adapted to ISOFIX interfaces of different sizes.

[0018] (4) By designing a connecting shaft between the two locking hooks and designing an electric drive component on the connecting shaft to electrically connect with the vehicle controller, the simultaneous unlocking and electric unlocking of the two locking hooks in the connection device of this application can be realized, thereby further improving the convenience of assembling or disassembling the child safety seat or booster seat of this application with the car seat. Attached Figure Description

[0019] To better understand the above and other objects, features, advantages, and functions of the present invention, reference can be made to the embodiments shown in the accompanying drawings. The same reference numerals in the drawings refer to the same parts. Those skilled in the art should understand that the drawings are intended to schematically illustrate preferred embodiments of the invention and do not limit the scope of the invention in any way; the parts in the drawings are not drawn to scale.

[0020] Figure 1 A schematic diagram of the structure of a child safety seat or booster seat according to an embodiment of the present invention is shown;

[0021] Figure 2A cross-sectional structural schematic diagram of a locking hook for a child safety seat or booster seat according to an embodiment of the present invention is shown;

[0022] Figure 3 A schematic diagram of the unlocking assembly of a locking hook for a child safety seat or booster seat according to an embodiment of the present invention is shown;

[0023] Figure 4 A partial cross-sectional view of an unlocking assembly for a locking hook of a child safety seat or booster seat according to an embodiment of the present invention is shown.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Shell; 11. Notch; 2. Cover; 21. Clearance opening; 22. Covering ring; 3. Locking rod; 41. Unlocking rod; 411. First tooth; 412. Second tooth; 413. Fixing rod; 42. Limiting block; 421. First slide groove; 43. First gear; 44. Second gear; 45. First wheel; 46. Second wheel; 47. Connecting rod; 48. First spring; 51. Second slide groove; 52. First column; 53. Second column; 54. Second spring; 61. First locking block; 62. Second locking block; 7. Flexible belt; 8. Heightening pad body; 81. Fixing strip. Detailed Implementation

[0026] The exemplary embodiments of this disclosure are described below with reference to the accompanying drawings, including various details of the embodiments to aid understanding, and should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this disclosure. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0027] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0028] To at least partially address one or more of the aforementioned problems and other potential issues, one embodiment of this disclosure provides a locking hook for a child safety seat or booster seat, comprising a housing 1, a locking lever 3, and an unlocking assembly; the mounting end of the housing 1 has a notch 11 extending along a direction close to the fixed end of the housing 1, and the fixed end of the housing 1 is fixedly connected to a connector for connection with the child safety seat body or booster seat body 8; the top of the locking lever 3 penetrates the upper side of the notch 11 and is slidably connected to the housing 1; when the locking hook is closed, the bottom end of the locking lever 3 abuts against or penetrates the lower side of the notch 11; the unlocking assembly is installed inside the housing 1 and includes an unlocking lever 41, a rotating shaft, a first gear 43, a first wheel 45, a connecting rod 47, and a first elastic element; the extending direction of the unlocking lever 41 is perpendicular to the housing 1. The unlocking rod 41 and the inner wall of the housing 1 are slidably connected along the extension direction of the housing 1. The first end of the unlocking rod 41 is connected to an unlocking button, which is used to drive the unlocking rod 41 to slide. The bottom surface of the second end of the unlocking rod 41 is provided with a first tooth 411 along the extension direction of the unlocking rod 41. The rotating shaft is set perpendicular to the unlocking rod 41 and is fixedly connected to the inner wall of the housing 1. The first gear 43 is rotatably connected to the rotating shaft, and the first gear 43 and the first tooth 411 are engaged. The first wheel 45 is rotatably connected to the rotating shaft, and the first gear 43 and the first wheel 45 are engaged. The first end of the connecting rod 47 is hinged to the first wheel 45 near the edge, and the second end is hinged to the locking rod 3 near the middle. The extension direction of the first elastic member is the same as the extension direction of the locking rod 3. One end of the first elastic member is connected to the top of the locking rod 3, and the other end is connected to the inner wall of the housing 1.

[0029] Specifically, such as Figures 1 to 4 As shown, the interior of the housing 1 is a hollow structure, and the dimensions of the outer contour of the housing 1 match the dimensions inside the ISOFIX interface. The assembly end of the housing 1 is provided with a notch 11 along the direction close to the fixed end of the housing 1. A connector is fixedly connected to the fixed end of the housing 1 for connecting with the child safety seat body or booster seat body 8. In some embodiments, the connector is a flexible strip 7, one end of which is fixedly connected to the fixed end of the housing 1, and the other end is fixedly connected to the child safety seat body or booster seat body 8.

[0030] The extension direction of the locking rod 3 is perpendicular to the extension direction of the housing 1. A first hole is provided on the upper side of the notch 11. The top of the locking rod 3 passes through the first hole and is slidably connected to the housing 1 through the first hole. When the lock hook is closed, the bottom end of the locking rod 3 abuts against or passes through the lower side of the notch 11. Preferably, a second hole is provided on the lower side of the notch 11, which corresponds to the first hole. The bottom of the locking rod 3 passes through the second hole and is slidably connected to the housing 1 through the second hole. When the lock hook is closed, the bottom of the locking rod 3 passes through the second hole. When the lock hook is open, the bottom of the locking rod 3 separates from the lower side of the notch 11.

[0031] like Figure 3 and Figure 4 As shown, the unlocking assembly is installed inside the housing 1. The unlocking assembly includes an unlocking rod 41, a rotating shaft, a first gear 43, a first wheel 45, a connecting rod 47, and a first elastic element. The extension direction of the unlocking rod 41 is the same as the extension direction of the housing 1, and the unlocking rod 41 is slidably connected to the inner wall of the housing 1 along the extension direction of the housing 1. An unlocking button is connected to the first end of the unlocking rod 41 for driving the unlocking rod 41 to slide. In some embodiments, the unlocking button is a fixed rod 413, which is fixedly installed perpendicular to the unlocking rod 41. An opening is formed on the side wall of the housing 1 extending along the housing 1. A through hole is provided in the direction of the housing, and a fixing rod 413 passes through the through hole. The fixing rod 413 pulls the unlocking rod 41 to slide inside the housing 1. In some embodiments, a second tooth 412 is provided on the top or bottom surface of the first end of the unlocking rod 41 along the extension direction of the unlocking rod 41. The unlocking button is a second gear 44. The second gear 44 is rotatably connected to the inner wall of the housing 1. The second gear 44 and the second tooth 412 are engaged. An extension is fixedly connected to the second gear 44. The extension passes through the housing 1. The extension rotates the second gear 44 to drive the unlocking rod 41 to slide inside the housing 1.

[0032] The bottom surface of the second end of the unlocking rod 41 is provided with a first tooth 411 along the extension direction of the unlocking rod 41; the rotating shaft is set perpendicular to the unlocking rod 41 and is fixedly connected to the inner wall of the housing 1; the first gear 43 is rotatably connected to the rotating shaft, and the first gear 43 cooperates with the first tooth 411; in some embodiments, the unlocking assembly also includes a limiting block 42, which is fixedly connected to the inner wall of the housing 1; the limiting block 42 includes a first part and a second part, the first part is fixedly connected to the rotating shaft, the first gear 43 is installed in the first part and is rotatably connected to the first part; the second part is provided with a first sliding groove 421 along the extension direction of the unlocking rod 41, the unlocking rod 41 is installed in the first sliding groove 421 and is slidably connected to the first sliding groove 421 along the extension direction of the unlocking rod 41.

[0033] In some embodiments, a slide rail is provided on the side of the middle portion of the unlocking rod 41 near the inner wall of the housing 1. The extension direction of the slide rail is the same as the extension direction of the unlocking rod 41. A slider is fixedly connected to the inner wall of the housing 1. The slider is installed in the slide rail and is slidably connected to the slide rail along the extension direction of the slide rail, which helps to improve stability. In other embodiments, a first locking block 61 and a second locking block 62 are fixedly connected to the unlocking rod 41. The first locking block 61 and the second locking block 62 are respectively located at both ends of the slide rail. When the lock hook is closed, the first locking block 61 overlaps with one end face of the limiting block 42. A limiting slide groove is provided on the inner wall of the housing 1 along the extension direction of the housing 1. The second locking block 62 is installed in the limiting slide groove and is slidably connected to the limiting slide groove. When the lock hook is opened or closed, the second locking block 62 overlaps with the two end faces of the limiting slide groove, respectively. Alternatively, a stop block is fixedly connected to the inner wall of the housing 1. When the lock hook is opened, the stop block overlaps with the second locking block 62 to limit the movement stroke of the unlocking rod 41.

[0034] The first wheel 45 is preferably a cam, rotatably connected to a rotating shaft, and the first gear 43 engages with the first wheel 45; the first end of the connecting rod 47 is hinged to the first wheel 45 near its edge, and the second end is hinged to the locking rod 3 near its center; in some embodiments, the unlocking assembly further includes a second wheel 46, which is preferably a cam, and is disposed opposite to the first wheel 45 and fixedly connected by a fixing pin and fixing hole structure; the first end of the connecting rod 47 is disposed between the first wheel 45 and the second wheel 46, and the second wheel 46 near its edge is engaged with the first end of the connecting rod 47. The connecting rod 47 is hinged, with connecting posts fixedly connected to both sides of the first end. Through holes are respectively opened at the edges of the first wheel 45 and the second wheel 46. The two connecting posts are rotatably connected in the two through holes, realizing the hinge connection between the first end of the connecting rod 47 and the first wheel 45 and the second wheel 46. The first elastic element can be selected as a spring or a rubber post. In this embodiment, the first elastic element is a first spring 48. The extension direction of the first spring 48 is the same as the extension direction of the locking rod 3. The bottom end of the first spring 48 is connected to the top end of the locking rod 3, and the top end is connected to the inner wall of the housing 1.

[0035] In some embodiments, such as Figure 2As shown, the outer wall of the housing 1 is covered with a cover 2 made of soft material. The two ends of the cover 2 are open structures. The outer contour of the cover 2 matches the inner surface of the ISOFIX interface. The cover 2 is snapped into the housing 1. Both sides of the cover 2 located at the assembly end of the housing 1 are provided with clearance openings 21, so that the notch 11 is exposed. In other embodiments, a second sliding groove 51 is provided on each of the opposite sides of the outer wall of the housing 1, and the extension direction of the second sliding groove 51 is the same as the extension direction of the housing 1; a first post 52 is fixedly connected to one end of the second sliding groove 51 near the assembly end of the housing 1; a second post 53 is fixedly connected to each of the opposite sides of the inner side wall of the cover 2, and the two second posts 53 are respectively installed in the two second sliding grooves 51, and the second posts 53 and the second sliding grooves 51 are slidably connected along the extension direction of the second sliding grooves 51; a second elastic element is provided in the second sliding groove 51, and the second elastic element can be selected as a spring or a rubber post. In this embodiment, the second elastic element is a second spring 54, and the second spring 54 is disposed between the first post 52 and the second post 53. One end of the second spring 54 is connected to the first post 52, and the other end is connected to the second post 53.

[0036] This application also provides a connecting device for a child safety seat or booster seat, including two locking hooks of a child safety seat or booster seat as described above and a connecting shaft, with both ends of the connecting shaft connected to unlocking buttons in the two locking hooks respectively.

[0037] Specifically, in some embodiments, the unlocking button in the locking hook is a fixed rod 413, and the two ends of the connecting shaft are respectively fixedly connected to the fixed rods 413 in the two locking hooks. Preferably, the connecting device of this application also includes an electric drive component, which is a cylinder. The cylinder is fixedly connected to the child safety seat body or booster seat body 8, and is electrically connected to the vehicle controller. The piston rod of the cylinder is connected to the connecting shaft for driving the connecting shaft to move. In some embodiments, the unlocking button is a second gear 44, and the two ends of the connecting shaft are respectively coaxially fixedly connected to the second gear 44 in the two locking hooks. Preferably, the connecting device of this application also includes an electric drive component, which is a drive motor. The drive motor is connected to the child safety seat body or booster seat body. The main body 8 is fixedly connected, the drive motor is electrically connected to the vehicle controller, and the output shaft of the drive motor is fixedly connected to the connecting shaft on the same axis to drive the connecting shaft to rotate. In some embodiments, the unlocking button in the lock hook is a fixed rod 413, and a second tooth 412 is opened at the first end of the unlocking rod 41, and a second gear 44 that cooperates with the second tooth 412 is provided. The two ends of the connecting shaft are respectively fixedly connected to the second gear 44 in the two lock hooks on the same axis. Pushing the fixed rod 413 in one lock hook causes the fixed rod 413 to slide the unlocking rod 41 in the housing 1, thereby causing the second tooth 412 in the lock hook to rotate. Through the connecting shaft, the second gear 44 in the other lock hook is driven to rotate synchronously, thereby realizing the simultaneous unlocking of the two lock hooks.

[0038] This application also provides a child safety seat or booster seat, such as Figure 1 As shown, the device includes a connecting device for a child safety seat or booster seat as described above, and a child safety seat body or booster seat body 8. The connectors of the two locking hooks are fixedly connected to the child safety seat body or booster seat body 8. Specifically, a fixing strip 81 is fixedly connected inside the child safety seat body or booster seat body 8, and the flexible bands 7 of the two locking hooks are fixedly connected to both ends of the fixing strip 81 by screws.

[0039] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand this document.

Claims

1. A locking hook for a child safety seat or booster seat, characterized in that: Includes a housing (1), a locking lever (3), and an unlocking assembly; The assembly end of the housing (1) is provided with a notch (11) along the direction close to the fixed end of the housing (1), and the fixed end of the housing (1) is fixedly connected with a connector for connecting to the child safety seat body or booster seat body (8). The top of the locking bar (3) passes through the upper side of the notch (11) and is slidably connected to the housing (1); when the lock hook is closed, the bottom end of the locking bar (3) abuts against or passes through the lower side of the notch (11); The unlocking assembly is installed inside the housing (1). The unlocking assembly includes an unlocking rod (41), a rotating shaft, a first gear (43), a first wheel (45), a connecting rod (47), and a first elastic element. The extension direction of the unlocking rod (41) is the same as the extension direction of the housing (1). The unlocking rod (41) is slidably connected to the inner wall of the housing (1) along the extension direction of the housing (1). An unlocking button is connected to the first end of the unlocking rod (41) to drive the unlocking rod (41) to slide. The bottom surface of the second end of the unlocking rod (41) is provided with a first tooth (411) along the extension direction of the unlocking rod (41). The rotating shaft is perpendicular to the unlocking rod. (41) Set and fixedly connected to the inner wall of the housing (1); the first gear (43) is rotatably connected to the rotating shaft, and the first gear (43) and the first tooth (411) are engaged; the first wheel (45) is rotatably connected to the rotating shaft, and the first gear (43) and the first wheel (45) are engaged; the first end of the connecting rod (47) is hinged to the edge of the first wheel (45), and the second end is hinged to the middle of the locking rod (3); the extension direction of the first elastic member is the same as the extension direction of the locking rod (3), one end of the first elastic member is connected to the top of the locking rod (3), and the other end is connected to the inner wall of the housing (1).

2. The locking hook of a child safety seat or booster seat according to claim 1, characterized in that: The unlocking assembly also includes a second wheel (46), which is disposed opposite to and fixedly connected to the first wheel (45). The first end of the connecting rod (47) is disposed between the first wheel (45) and the second wheel (46), and the second wheel (46) is hinged to the first end of the connecting rod (47) near its edge.

3. The locking hook of a child safety seat or booster seat according to claim 1, characterized in that: The unlocking assembly also includes a limiting block (42), which is fixedly connected to the inner wall of the housing (1). The limiting block (42) includes a first part and a second part. The first part is fixedly connected to the rotating shaft. A first gear (43) is installed in the first part and is rotatably connected to the first part. A first groove (421) is provided in the second part. The unlocking rod (41) is installed in the first groove (421) and is slidably connected to the first groove (421) along the extension direction of the unlocking rod (41).

4. The locking hook of a child safety seat or booster seat according to claim 1, characterized in that: The outer wall of the housing (1) is covered with a cover (2). The two ends of the cover (2) are open structures. The outer contour of the cover (2) matches the inner surface of the ISOFIX interface. The cover (2) is snapped into the housing (1). Both sides of the cover (2) located at the assembly end of the housing (1) are provided with clearance openings (21) so that the notch (11) is exposed.

5. The locking hook of a child safety seat or booster seat according to claim 4, characterized in that: A second sliding groove (51) is provided on the outer side wall of the housing (1), and the extension direction of the second sliding groove (51) is the same as the extension direction of the housing (1); a first column (52) is fixedly connected to one end of the second sliding groove (51) near the assembly end of the housing (1); a second column (53) is fixedly connected to the inner side wall of the cover (2), and the second column (53) is installed in the second sliding groove (51) and is slidably connected to the second sliding groove (51) along the extension direction of the second sliding groove (51); a second elastic member is provided in the second sliding groove (51), one end of the second elastic member is connected to the first column (52), and the other end is connected to the second column (53).

6. The locking hook of a child safety seat or booster seat according to claim 1, characterized in that: The connector is a flexible strip (7), one end of which is fixedly connected to the fixed end of the housing (1), and the other end is fixedly connected to the child safety seat body or booster seat body (8).

7. A connecting device for a child safety seat or booster seat, characterized in that: It includes a locking hook and a connecting shaft for a child safety seat or booster seat as described in any one of claims 1 to 6, wherein the two ends of the connecting shaft are respectively connected to the unlocking buttons in the two locking hooks.

8. The connecting device for a child safety seat or booster seat according to claim 7, characterized in that: The unlocking button is a second gear (44), which is rotatably connected to the inner wall of the housing (1); the first end of the unlocking rod (41) is provided with a second tooth (412), which cooperates with the second gear (44); the two ends of the connecting shaft are fixedly connected to the second gear (44) in the two locking hooks respectively.

9. A connecting device for a child safety seat or booster seat according to claim 7 or 8, characterized in that: It also includes an electric drive unit, which is used to electrically connect to the vehicle controller; the electric drive unit is connected to the connecting shaft and is used to drive the connecting shaft to move or rotate.

10. A child safety seat or booster seat, characterized in that: Includes a connecting device for a child safety seat or booster seat as described in any one of claims 7 to 9, and a child safety seat body or booster seat body (8), wherein the connecting members of the two locking hooks are fixedly connected to the child safety seat body or booster seat body (8).

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