A seat belt guide and a child safety seat

Abstract

The application discloses a safety belt guiding device and a child safety seat, which comprise a guiding member and a lock catch movably arranged on the guiding member, the guiding member is provided with a guiding channel, the guiding channel is communicated with the guiding space and an external space, the lock catch is adapted to selectively open or close the guiding channel, when the lock catch closes the guiding channel, at least a part of the lock catch is combined with the guiding member as a whole, and the lock catch and the guiding member form a smooth bearing surface. At least a part of the lock catch is combined with the guiding member as a whole, the lock catch is effectively supported in multiple directions by the guiding member, so that the lock catch and partial structures such as the connecting area of the lock catch and the guiding member are not prone to deformation or breakage, and the structural strength and safety performance index of the safety belt guiding device are improved.

Description

Technical Field

[0001] This application relates to the field of child safety seat technology, specifically to a seat belt guide device and a child safety seat. Background Technology

[0002] A child safety seat is a seat specifically designed for children of different ages and sizes. It is suitable for installation in vehicle seats to improve children's safety while traveling. In the event of a collision or sudden deceleration, a child safety seat can reduce the impact force on the child and restrict their body movement, thus minimizing harm. Child safety seats on the market can be broadly divided into those with built-in seat belts and those without. Seat belt-equipped safety seats have a built-in five-point harness that directly restrains the child, while seat belt-free safety seats require the car's three-point seat belt to pass through a guide device on the seat to indirectly restrain the child.

[0003] The guiding devices for non-belt-equipped child safety seats mainly include fixed guiding devices and linked guiding devices. Fixed guiding devices use guide hooks, while linked guiding devices use a combination of guide components and latches. However, both of these guiding devices have defects.

[0004] First, fixed guide devices rely solely on the end face of the guide hook to withstand impact forces, and multi-directional impact forces can easily cause the guide hook to deform or break. Second, because the guide space formed by the guide hook in a fixed guide device is not enclosed, there is a risk of the seat belt detaching from the guide hook during use. Therefore, the guide channel used to enter and exit the guide space in a fixed guide device is designed to be smaller and more complex to prevent the seat belt from detaching from the guide hook. However, this leads to the problem of the seat belt being "difficult to enter and difficult to exit," making the installation and removal of the seat belt difficult. Finally, the shape design of the guide hook in a fixed guide device is flawed, failing to fully consider the natural bending characteristics of the actual installation path of the seat belt, resulting in limited seat belt retraction.

[0005] Compared to fixed guide devices, linked guide devices utilize the guide space of the locking buckle to achieve the goal of "easy to get in but difficult to get out" of the seat belt. However, due to its structural characteristics, it is prone to local structural deformation or breakage of the buckle and the connection area between the buckle and the guide when subjected to multi-directional impact loads. In addition, the unlocking part of the buckle in existing linked guide devices is usually located on the inside or rear of the guide. When children in small groups use car seats, the unlocking part of the buckle is often difficult to see and touch directly due to obstructed vision and space limitations, which makes the seat belt removal operation cumbersome and more difficult. Summary of the Invention

[0006] One objective of this application is to provide a seat belt guide device to solve the problem that existing seat belt guide devices are prone to deformation or breakage under multi-directional impact forces.

[0007] Another object of this application is to provide a child safety seat having the aforementioned seat belt guide device.

[0008] To achieve the above objectives, the technical solution adopted in this application is as follows: a seat belt guiding device, comprising a guide member that encloses to form a guiding space and a buckle movably disposed on the guide member, wherein the guide member is provided with a guiding channel that connects the guiding space and the external space, and the buckle is adapted to selectively open or close the guiding channel. When the buckle closes the guiding channel, at least a portion of the buckle is integrated with the guide member to form a whole, and the two form a smooth bearing surface.

[0009] In some embodiments, a notch is provided on the inner sidewall of the guide member near the guide space. The notch is adapted to at least a portion of the latch. When the latch closes the guide channel, at least a portion of the latch is disposed in the notch to be integrated with the guide member as a whole.

[0010] In some embodiments, the latch is provided with a limiting tooth, and the inner sidewall of the guide is provided with a limiting groove. The limiting groove is adapted to the limiting tooth, so that when the latch closes the guide channel, the limiting tooth is disposed in the limiting groove; or, the inner sidewall of the guide is provided with a limiting tooth, and the latch is provided with a limiting groove. The limiting groove is adapted to the limiting tooth, so that when the latch closes the guide channel, the limiting tooth is disposed in the limiting groove.

[0011] In some embodiments, the latch includes a locking portion for opening and closing the guide channel and a lever portion for operating the locking portion. The lever portion can be turned to cause the locking portion to rotate to open or close the guide channel. The lever portion is located on the outside of the guide member and on the side of the guide member near the seating space of the seat body.

[0012] In some embodiments, the limiting tooth includes at least two pressing teeth, each pressing tooth being spaced apart along the depth direction of the guide space and disposed on the locking part; the limiting groove includes at least two tooth grooves, each tooth groove being spaced apart along the depth direction of the guide space and disposed on the guide member; when the locking part closes the guide channel, each pressing tooth is correspondingly embedded in each tooth groove. Alternatively, the limiting tooth includes at least two pressing teeth, each pressing tooth being spaced apart along the depth direction of the guide space and disposed on the guide member; the limiting groove includes at least two tooth grooves, each tooth groove being spaced apart along the depth direction of the guide space and disposed on the locking part; when the locking part closes the guide channel, each pressing tooth is correspondingly embedded in each tooth groove.

[0013] In some embodiments, an elastic element is provided between the latch and the guide member, the elastic element being adapted to push the latch so that the locking portion closes the guide channel.

[0014] In some embodiments, the inner wall of the guide member near the guide space is provided with a guide surface, which is adapted to guide the seat belt to slide within the guide space to ensure seat belt retraction.

[0015] In some embodiments, the guide includes two support portions and two load portions. The first ends of the two load portions are respectively connected to the two ends of one support portion, and the second ends of the two load portions are respectively connected to the two ends of the other support portion. One end of the load portion is smoothly connected to one support portion to form an arc-shaped first transition segment, and the other end of the load portion is smoothly connected to the other support portion to form an arc-shaped second transition segment. The curvature of the first transition segment is greater than that of the second transition segment. The load portion, the first transition segment, and the support portion define the guide surface.

[0016] This application also provides a child safety seat, including a seat body and the aforementioned seat belt guide device, the seat belt guide device being disposed on the seat body.

[0017] In some embodiments, the latch includes a locking part and a lever part, the lever part being movable to cause the locking part to rotate to open or close the guide channel, and the seat body is provided with an avoidance cavity, the position of the avoidance cavity corresponding to the position of the lever part.

[0018] Compared with the prior art, the beneficial effects of this application are as follows:

[0019] (1) The buckle and the guide are connected as one piece to form a flat bearing end face. The buckle and the guide can jointly bear the impact force through the bearing end face. And through the cooperation of the limiting teeth and the limiting groove, the buckle abuts against the guide in multiple directions and is supported by the guide. When the buckle and the guide together bear the multi-directional impact force, the local structure such as the buckle and the connection area between the buckle and the guide is not easy to deform or break, thus improving the structural strength and safety performance index of the seat belt guide device.

[0020] (2) The buckle is movably set on the guide to selectively open and close the guide channel, which facilitates the seat belt to enter the guide space while preventing the seat belt from being passively separated from the guide space, thereby achieving the "easy to enter but difficult to exit" of the seat belt. The lever part of the buckle is located on the side of the guide near the seat body's seating space. The lever part of the buckle is in a position that is easy to observe and touch, making it convenient for users to remove the seat belt after use.

[0021] (3) A large-angle progressive curved surface is formed between the bearing part and the load part of the guide, and the seat belt can slide smoothly along the progressive curved surface to ensure that the seat belt can retract smoothly and eliminate the slack gap between the seat belt and the child's body. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an existing fixed seat belt guide device.

[0023] Figure 2 This is a schematic diagram of an existing linked seat belt guide device.

[0024] Figure 3 This is a schematic diagram of the seat belt guide device when the buckle is in the first position in this application.

[0025] Figure 4 This is a schematic diagram of the seat belt guide device when the buckle is in the second position in this application.

[0026] Figure 5 This is a front view of the guide component in this application.

[0027] Figure 6 This is a rear view of the guide component and the latch in this application.

[0028] Figure 7 This is a three-dimensional schematic diagram of the guide component in this application.

[0029] Figure 8 This is a three-dimensional schematic diagram of the latch in this application.

[0030] Figure 9 This is an exploded schematic diagram of the seat belt guide device in this application.

[0031] In the diagram: 100, seat body; 110, clearance cavity; 200, guide component; 210, load-bearing part; 220, load-bearing part; 230, guide space; 240, guide channel; 250, notch; 260, limiting groove; 261, first tooth groove; 262, second tooth groove; 270, positioning post; 280, reinforcing rib; 300, latch; 310, wrench part; 320, locking part; 330, shaft hole; 340, limiting tooth; 341, first pressure tooth; 342, second pressure tooth; 400, elastic component. Detailed Implementation

[0032] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0033] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0034] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0035] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0036] To facilitate understanding of the technical solutions of the embodiments described below, the directions mentioned below are explained as follows: the X-axis, Y-axis, and Z-axis are three mutually perpendicular coordinate axes in space.

[0037] Existing child safety seats without built-in seat belts generally include a seat body and a seat belt guide device mounted on the seat body. The seat belt guide device is designed to provide a clear path and fixed position for the seat belt, allowing it to accurately pass around the seat body of the child safety seat. This ensures that the seat belt is always in the correct position on the child's body, preventing injury to the child in the event of an accident.

[0038] Existing seatbelt guiding devices mainly include fixed guiding devices and linked guiding devices. For example... Figure 1 As shown, fixed guiding devices generally only use guide hooks, which form a receiving space for accommodating the seat belt and an S-shaped or Z-shaped seat belt entry and exit passage connecting the receiving space and the external space; such as Figure 2 As shown, a linkage-type guide device generally uses a guide member and a buckle. The guide member forms a receiving space for accommodating the seat belt and a seat belt entry and exit channel connecting the receiving space and the outside space. One end of the buckle is hinged to the guide member, and the other end of the buckle can be detachably engaged with the guide member. The buckle can selectively open and close the seat belt entry and exit channel.

[0039] However, both of these guiding devices have defects.

[0040] First, the overall structural strength of fixed guide devices is relatively poor, relying solely on the guide hook to withstand multi-directional impact loads. The guide hook is typically integrally formed with the seat body at its end, so when multi-directional impact loads are applied to the guide hook, stress concentrates at the connection area between the guide hook and the seat body, potentially causing localized plastic deformation or fracture at this point. Second, because the guide space created by the guide hook in a fixed guide device is not enclosed, there is a risk of the seatbelt detaching from the guide hook during use. Therefore, the access channels for entering and exiting the guide space in fixed guide devices are often smaller and more complex to prevent seatbelt detachment. However, this results in a "difficult to get in and out" problem for the seatbelt, making installation and removal cumbersome and difficult. Finally, the design of the guide hook in a fixed guide device is flawed, failing to fully consider the natural bending characteristics of the actual installation path of the seatbelt, thus limiting seatbelt retraction.

[0041] Based on the aforementioned shortcomings of fixed guide devices, seat belt guide devices have gradually evolved into linked guide devices. Compared to fixed guide devices, in linked guide devices, the guide component is installed on the seat body through the cooperation of multiple mounting posts and multiple mounting slots. When the guide component bears multi-directional impact loads, these loads can be transferred and dispersed onto the seat body, avoiding stress concentration and thus increasing the overall structural strength. Furthermore, the locking buckle occupies the guide space of the guide component, achieving the goal of "easy entry but difficult exit" for the seat belt. However, in linked guide devices, one end of the locking buckle is hinged to the guide component, while the other end is detachably connected to the guide component through the cooperation of a limiting opening and a limiting protrusion. The buckle only contacts the guide component in the direction of entering and exiting the guide channel for effective support; in other directions, the buckle does not contact the guide component for effective support. Based on this structure, when the guide and buckle are subjected to multi-directional impact loads, they each need to independently withstand the loads. These multi-directional impact loads can cause the buckle's limiting opening to detach from the limiting protrusion and the connection between the buckle and the guide to break, making it impossible for the buckle to effectively seal the guide space. This poses a risk of the seatbelt detaching from the guide. Furthermore, in existing linked guide devices, the buckle's unlocking mechanism is usually located inside or behind the guide. When the guide is adjusted to suit the child's age group, the unlocking mechanism is often difficult to observe and touch due to obstructed vision and space limitations. This makes the seatbelt removal process cumbersome and difficult, negatively impacting the user experience.

[0042] To address the aforementioned issues, this application provides a child safety seat, comprising a seat body 100 and a seat belt guide device disposed on the seat body 100. Figure 3-9 As shown, the seat belt guiding device includes a guide member 200 and a buckle 300 movably disposed on the guide member 200. The guide member 200 is provided with a guide channel 240, which connects the guide space 230 and the external space. The buckle 300 is adapted to selectively open or close the guide channel 240. When the buckle 300 closes the guide channel 240, at least a portion of the buckle 300 is integrated with the guide member 200 to form a smooth bearing surface.

[0043] like Figure 3-4As shown, the guide member 200 is disposed on the headrest, backrest, base, etc. of the seat body 100, and the guide member 200 is located in the YZ plane. The guide member 200 includes two support parts 210 and two load parts 220. The first ends of the two load parts 220 are respectively connected to the two ends of one of the support parts 210, and the second ends of the two load parts 220 are respectively connected to the two ends of the other support part 210. The two support parts 210 and the two load parts 220 enclose a guide space 230. A guide channel 240 is provided on one of the support parts 210 or one of the load parts 220. The guide channel 240 connects the guide space 230 and the outside space, and the seat belt can enter and exit the guide space 230 through the guide channel 240. In this embodiment, the guide channel 240 is preferably disposed on the support part 210 located at the bottom.

[0044] like Figure 3-6 As shown, the latch 300 is rotatably mounted on the guide member 200 in the YZ plane through the engagement of the shaft hole 330 and the positioning post 270. The latch 300 includes a locking part 320 and a lever part 310. The lever part 310 can be pressed and moved to drive the locking part 320 to rotate to the second position to open the guide channel 240 to allow the seat belt to enter and exit the guide space 230, or rotate to the first position to close the guide channel 240 to restrict the seat belt from entering and exiting the guide space 230. When the locking part 320 closes the guide channel 240, the locking part 320 of the latch 300 and the bearing part 210 of the guide member 200 are integrated into a whole. The locking part 320 and the bearing part 210 form a smooth bearing surface, that is, a part of the latch 300 is integrated into the guide member 200.

[0045] When the seat belt comes into contact with the locking part 320 and the bearing part 210, the smooth bearing surface allows the seat belt to be laid flat on the locking part 320 and the bearing part 210. The impact load transmitted by the seat belt can be evenly distributed to all parts of the locking part 320 and the bearing part 210, thereby avoiding the seat belt being twisted on the locking part 320 and the bearing part 210. Twisting the seat belt will cause the impact load transmitted by the seat belt to concentrate in a certain part of the locking part 320 and the bearing part 210, causing the locking part 320 and the bearing part 210 to deform and break due to stress concentration.

[0046] It is worth mentioning that the latch 300 may also include only the locking part 320. When the locking part 320 closes the guide channel 240, the locking part 320 of the latch 300 and the bearing part 210 of the guide member 200 are combined into a whole. The locking part 320 and the bearing part 210 form a smooth bearing end face, that is, the entire latch 300 is combined into a whole with the guide member 200.

[0047] like Figure 5-7As shown, the support portion 210 at the bottom is also provided with a notch 250 and a limiting groove 260. Both the notch 250 and the limiting groove 260 are located on the inner sidewall of the support portion 210 near the guide space 230. The shape of the notch 250 is adapted to the locking portion 320 of the latch 300, that is, the shape of the notch 250 is adapted to a part or the entirety of the latch 300. When the locking portion 320 closes the guide channel 240, the locking portion 320 is disposed in the notch 250 to be combined with the support portion 210 as a whole. The locking portion 320 abuts against the support wall. The inner sidewall of the locking portion 320 and the inner sidewall of the support portion 210 are connected to form the aforementioned support surface. The support surface can be implemented as a plane or a curved surface. The locking part 320 is also provided with a limiting tooth 340, and the shape of the limiting groove 260 is adapted to the limiting tooth 340. When the locking part 320 closes the guide channel 240, the limiting tooth 340 is disposed in the limiting groove 260. In summary, the locking part 320 and the supporting part 210 abut against each other in multiple directions, so that the locking part 320 is supported by the supporting part 210 in multiple directions.

[0048] Furthermore, the limiting tooth 340 includes a first pressing tooth 341 and a second pressing tooth 342, and the limiting groove 260 includes a first tooth groove 261 and a second tooth groove 262. The first pressing tooth 341 and the second pressing tooth 342 are arranged at intervals along the depth direction (i.e., the X-axis direction) of the guide space 230, and the first tooth groove 261 and the second tooth groove 262 are arranged at intervals along the depth direction (i.e., the X-axis direction) of the guide space 230. The first pressing tooth 341 is adapted to cooperate with the first tooth groove 261, and the second pressing tooth 342 is adapted to cooperate with the second tooth groove 262, thereby forming a mechanical interlock between the locking part 320 and the bearing wall. The side wall of the first tooth groove 261, the side wall of the second tooth groove 262, and the partition between the first tooth groove 261 and the second tooth groove 262 abut against the first pressing tooth 341 and the second pressing tooth 342, so that the locking part 320 is supported by the bearing part 210 in multiple directions.

[0049] Specifically, the locking part 320 is supported by the bearing part 210 in the X-axis, Y-axis and Z-axis directions. The locking part 320 and the bearing part 210 are integrated as a whole. When the vehicle collides or brakes suddenly, the locking part 320 and the bearing part 210 can jointly withstand multi-directional impacts. Furthermore, the locking part 320 is locked and limited by the cooperation of the limiting tooth 340 and the limiting groove 260, which can prevent the connection between the latch 300 and the guide member 200 from deforming or breaking due to abnormal displacement of the locking part 320 relative to the bearing part 210, thereby improving the safety performance index.

[0050] In some preferred embodiments, the back of the bearing portion 210 and the load portion 220 of the guide member 200 are also provided with a number of reinforcing ribs 280 to improve the structural strength of the guide member 200 and ensure the structural reliability of the bearing portion 210 and the load portion 220.

[0051] Furthermore, such as Figure 5 As shown, the inner walls of both the bearing portion 210 and the load portion 220 are smoothly arranged. The bearing portion 210 extends along the Y-axis direction, and the load portion 220 is inclined relative to the bearing portion 210. Thus, one end of the load portion 220 is smoothly connected to the end of a bearing portion 210 to form an arc-shaped first transition segment, and the other end of the load portion 220 is smoothly connected to another bearing portion 210 to form an arc-shaped second transition segment. The curvature of the first transition segment is greater than that of the second transition segment. The bearing portion 210, the first transition segment, and the load portion 220 define a guide surface. The guide surface is located on the inner wall of the guide member 200 near the guide space 230. The guide surface is suitable for guiding the seat belt to slide along the guide surface to ensure the smooth retraction of the seat belt. The guide surface is preferably implemented as a large-angle progressive oblique surface.

[0052] After the seatbelt buckle is inserted into the seatbelt socket, the seatbelt needs to retract and pre-tension to eliminate the slack gap between the seatbelt and the human body, thereby ensuring the restraint function of the seatbelt. The seatbelt guide device provided in this embodiment of the application forms a guide surface through the smooth arrangement of the inner sidewalls of the bearing portion 210 and the load portion 220, and the smooth transition connection between the bearing portion 210 and the load portion 220. This allows the seatbelt to slide smoothly along the guide surface and retract smoothly, avoiding the problem of the guide member 200 obstructing the sliding of the seatbelt, causing the seatbelt to be unable to retract and resulting in the failure of the seatbelt restraint function.

[0053] Furthermore, the latch 300 is configured on the second transition section between the load portion 220 on the left side and the bearing portion 210 at the bottom through the engagement of the shaft hole 330 and the positioning post 270. The lever portion 310 and the locking portion 320 of the latch 300 are inclined or vertically arranged relative to each other, forming an angle between them. The degree of this angle is greater than the arc of the second transition section. Thus, regardless of whether the locking portion 320 closes or opens the guide channel 240, the lever portion 310 remains on the left side of the load portion 220 on the left side, so that the lever portion 310 is located on the side of the guide member 200 close to the seating space of the seat body 100.

[0054] It is worth mentioning that, since the guide channel 240 is not limited to being located on the support portion 210 at the bottom, the positions of the aforementioned latch 300 and the lever portion 310 of the latch 300 will vary depending on the position of the guide channel 240. The positions of the guide channel 240, latch 300, and lever portion 310 of the latch 300 are only those in one specific embodiment. The positions of the guide channel 240, latch 300, and lever portion 310 of the latch 300 can be selected according to the actual installation position of the guide member 200. It is sufficient to ensure that the lever portion 310 of the latch 300 is located on the side of the guide member 200 near the seating space of the seat body 100, thereby ensuring that the lever portion 310 is easily observed and touched, thus reducing the difficulty of operating the lever portion 310.

[0055] In addition, such as Figure 9 As shown, an elastic element 400 is provided between the latch 300 and the guide member 200. The elastic element 400 is adapted to push the latch 300 so that the locking part 320 closes the guide channel 240, that is, the guide channel 240 is in a "normally closed state". Specifically, the elastic element 400 is preferably implemented as a torsion spring, with one torsion arm of the torsion spring abutting the guide member 200 and the other torsion arm of the torsion spring abutting the latch 300. When the locking part 320 of the latch 300 closes the guide channel 240, the torsion spring is in its initial state. The torsion spring in the initial state has a certain deformation, and thus the torsion spring can apply a preload to the latch 300, so that when the external force applied to the latch 300 does not exceed the preload, the latch 300 rotates and the locking part 320 opens the guide channel 240. When the locking part 320 of the latch 300 opens the guide channel 240, the torsion spring is in its working state. The torsion spring in the working state is further formed, and thus the torsion spring can apply a reset force to the latch 300, so that when the external force applied to the latch 300 is removed, the latch 300 can quickly reset and the locking wall closes the guide channel 240.

[0056] Preferably, the buckle 300 rotates counterclockwise from the first position to the second position along the X-axis in the YZ plane, that is, when the buckle 300 rotates from the first position to the second position, the locking part 320 of the buckle 300 moves towards the guide space 230. Therefore, when the seat belt enters the guide space 230, there is no need to operate the lever part 310 to rotate the buckle 300 from the first position to the second position; the lever part 310 is only needed to be operated when the seat belt disengages from the guide space 230 to rotate the buckle 300 from the first position to the second position.

[0057] During seat belt installation, the seat belt enters the guide space 230 through the guide channel 240 and abuts against the locking part 320 of the buckle 300. The seat belt pushes against the locking part 320 of the buckle 300, causing the buckle 300 to rotate from the first position to the second position. After the seat belt is fully inside the guide space 230, the buckle 300 returns to the first position from the second position under the action of the elastic member 400, and the seat belt is locked within the guide space 230, thus achieving the "easy to enter, difficult to exit" principle for the seat belt. It should be noted that the "difficult to exit" mentioned above refers to the ease with which the seat belt is passively detached from the guide member 200, not the ease with which the seat belt is removed from the guide member 200.

[0058] When removing the seat belt, turning the lever 310 of the buckle 300 causes the buckle 300 to rotate from the first position to the second position. The seat belt can then disengage from the guide space 230 through the guide channel 240. Once the seat belt is completely disengaged, releasing the lever 310 causes the buckle 300 to return to the first position under the action of the elastic element 400, completing the removal of the seat belt. The entire process of removing the seat belt is simple and convenient, requiring only the turning of the lever 310 of the buckle 300. Furthermore, the lever 310 is located on the outside of the guide element 200, making it easily visible and accessible. Users can directly observe the lever 310 when turning it, eliminating the need for blindly searching for it, thus improving the user experience and ensuring that the seat belt is "easy to get in but difficult to get out," while also guaranteeing the convenience of seat belt removal.

[0059] In some preferred embodiments, such as Figure 3-4 As shown, the seat body 100 is provided with a relief cavity 110 that adapts to the lever part 310 of the buckle 300. The position of the relief cavity 110 corresponds to the lever part 310 of the buckle 300. The lever part 310 of the buckle 300 is housed in the relief cavity 110, which makes the lever part 310 and the seat body 100 have a larger operating space, further facilitating the user to move the lever part 310 and reducing the difficulty of removing the seat belt.

[0060] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A seatbelt guide device, suitable for installation on a seat body, characterized in that, The device includes a guide member that encloses and forms a guide space and a latch that is movably disposed on the guide member. The guide member has a guide channel that connects the guide space and the outside space. The latch is adapted to selectively open or close the guide channel. When the latch closes the guide channel, at least a portion of the latch is integrated with the guide member to form a smooth bearing surface.

2. The seat belt guide device as described in claim 1, characterized in that, The guide member has a notch on its inner sidewall near the guide space. The notch is adapted to at least a portion of the latch. When the latch closes the guide channel, at least a portion of the latch is disposed in the notch to combine with the guide member as a whole.

3. The seat belt guide device as described in claim 2, characterized in that, The latch is provided with a limiting tooth, and the inner sidewall of the guide is provided with a limiting groove. The limiting groove is adapted to the limiting tooth, so that when the latch closes the guide channel, the limiting tooth is positioned in the limiting groove. Alternatively, the inner wall of the guide member is provided with a limiting tooth, and the latch is provided with a limiting groove. The limiting groove is adapted to the limiting tooth, so that when the latch closes the guide channel, the limiting tooth is positioned in the limiting groove.

4. The seat belt guide device as described in claim 3, characterized in that, The latch includes a locking part and a lever part. The lever part can be moved to allow the locking part to rotate and open or rotate and close the guide channel. The lever part is located on the outside of the guide member and on the side of the guide member near the seating space of the seat body.

5. The seat belt guide device as described in claim 4, characterized in that, The limiting tooth includes at least two pressing teeth, and each pressing tooth is arranged at intervals along the depth direction of the guide space in the locking part. The limiting groove includes at least two tooth grooves, and each tooth groove is arranged at intervals along the depth direction of the guide space in the guide member. When the locking part closes the guide channel, each pressing tooth is correspondingly embedded in each tooth groove. Alternatively, the limiting tooth includes at least two pressing teeth, each pressing tooth being arranged at intervals along the depth direction of the guide space on the guide member, and the limiting groove includes at least two tooth grooves, each tooth groove being arranged at intervals along the depth direction of the guide space on the locking part, and when the locking part closes the guide channel, each pressing tooth is correspondingly embedded in each tooth groove.

6. The seat belt guide device as described in claim 4, characterized in that, An elastic element is provided between the latch and the guide member, and the elastic element is adapted to push the latch so that the locking part closes the guide channel.

7. The seat belt guide device as described in any one of claims 1-6, characterized in that, The inner wall of the guide member near the guide space is provided with a guide surface, which is adapted to guide the seat belt to slide within the guide space to ensure the seat belt retracts.

8. The seat belt guide device as described in claim 7, characterized in that, The guide includes two support portions and two load portions. The first ends of the two load portions are respectively connected to the two ends of one support portion, and the second ends of the two load portions are respectively connected to the two ends of the other support portion. One end of the load portion is smoothly connected to one support portion to form an arc-shaped first transition segment, and the other end of the load portion is smoothly connected to the other support portion to form an arc-shaped second transition segment. The arc of the first transition segment is greater than the arc of the second transition segment. The load portion, the first transition segment, and the support portion define the guide surface.

9. A child safety seat, characterized in that, It includes a seat body and a seat belt guide as described in any one of claims 1-8, wherein the seat belt guide is disposed on the seat body.

10. The child safety seat as described in claim 9, characterized in that, The latch includes a locking part and a lever part. The lever part can be moved to cause the locking part to rotate and open or rotate and close the guide channel. The seat body is provided with a relief cavity, the position of which corresponds to the position of the lever part.

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