Child safety seat

Abstract

This invention discloses a child safety seat, including a seat body and a top strap mechanism. The top strap mechanism is connected to the backrest of the seat body. The top strap mechanism includes: an upper pull strap assembly, one end of which is connected to the seat body, and the other end is provided with a locking member for engaging the vehicle seat; and a retaining member, which is connected to the seat body and the upper pull strap assembly respectively. The retaining member is an elastic member and applies an upward force to the upper pull strap assembly so that the retaining member can support the upper pull strap assembly to protrude upward relative to the child safety seat. When the upper pull strap assembly is in a relaxed state, the retaining member can support the upper pull strap assembly to protrude upward relative to the backrest; when the upper pull strap assembly is in a tightened state, the upper pull strap assembly can press against the retaining member, causing the retaining member to undergo elastic deformation.

Description

[Technical Field]

[0001] This invention relates to the field of infant and toddler products technology, and in particular to a top strap mechanism and a child safety seat including the same. [Previous Technology]

[0002] Currently, relying solely on car seat belts and ISOFIX anchoring devices to restrain child safety seats is insufficient to meet children's safety needs. Therefore, further restraint via a top strap is required to ensure safety. However, many users forget to fasten the top strap when using child safety seats, which compromises the child's safety. Consequently, there is an urgent need for a lower-cost and more stable structure to improve the use of the top strap in child safety seats. [Summary of the Invention]

[0003] This invention provides a child safety seat, comprising a seat body and a top strap mechanism, the top strap mechanism being connected to the backrest portion of the seat body. The top strap mechanism includes: an upper tether assembly, one end of which is connected to the seat body, and the other end having a locking member for engaging the vehicle seat; and a retaining member, which is connected to the seat body and the upper tether assembly respectively. The retaining member is an elastic member and applies an upward force to the upper tether assembly, enabling the retaining member to support the upper tether assembly to protrude upward relative to the child safety seat. When the upper tether assembly is in a relaxed state, the retaining member supports the upper tether assembly to protrude upward relative to the backrest portion; when the upper tether assembly is in a tensioned state, the upper tether assembly presses against the retaining member, causing the retaining member to undergo elastic deformation.

[0004] In one embodiment, the retainer includes a fixed section and a support section connected to the fixed section. The fixed section is connected to the backrest. When the top strap mechanism is in a slack state, the support section extends upward from the upper edge of the backrest and is used to support the pull strap assembly.

[0005] In one embodiment, the support segment includes a first curved segment that warps from the upper edge toward a rearward direction away from the backrest.

[0006] In one embodiment, the support segment includes a second curved segment that extends forward toward the backrest, thereby keeping the pull strap assembly in front of the backrest.

[0007] In one embodiment, a mounting groove and an upper pull strap through groove are formed from the upper edge of the backrest portion, and the fixing segment is inserted into the mounting groove; the upper pull strap assembly is inserted into the upper pull strap through groove; the width of the top of the mounting groove is greater than the width of the bottom, so as to form a guide space for the retainer at the top of the mounting groove.

[0008] In one embodiment, the mounting groove is inclined forward from bottom to top, the fixing segment is inserted into the mounting groove at an inclination along the mounting groove, and the top of the mounting groove is provided with a rearward protruding abutment, the abutment abutting against the rearward warping of the supporting segment, so that the extending directions of the fixing segment and the supporting segment are different.

[0009] In one embodiment, the backrest portion includes a fastener connected to the backrest body, the fixing segment is connected to the backrest body by the fastener, the fixing segment includes a mounting ring, the backrest body includes an outer shell and an inner shell, the outer shell and the inner shell are connected together to form an inner cavity, the backrest body also includes a locking post protruding from one of the outer shell and the inner shell into the inner cavity, the mounting ring is sleeved on the locking post and locked by the fastener, the upper edge includes a mounting groove leading to the inner cavity, and a retainer extends outward from the mounting groove.

[0010] In one embodiment, the pull-up strap assembly includes a webbing and a length adjusting member. A first end of the webbing is connected to the backing portion and a second end is provided with the locking member. The length adjusting member is threaded onto the webbing and is used to adjust the length of the webbing. The support segment is connected to the webbing or the length adjusting member.

[0011] In one embodiment, the pull-up strap assembly is Y-shaped and includes a webbing and a locking member threaded on the webbing; the locking member divides the webbing into a first webbing segment and a second webbing segment connected to the first webbing segment, the first webbing segment and the second webbing segment are respectively connected to opposite sides of the backrest, the first webbing segment is provided with a length adjusting member, and the retaining member is connected to the first webbing segment.

[0012] In one embodiment, the retainer is at least one of a compression spring, a tension spring, a herringbone spring, a spring sheet, and a gooseneck tube; wherein the support section is sewn onto the upper zipper assembly; or the upper zipper assembly has a pocket in which the support section is fitted.

[0013] In one embodiment, the seat body further includes a top rod disposed behind the backrest, one end of the upper pull strap assembly is connected to the top rod of the seat body, the retaining member includes a fixing section and a supporting section connected to the fixing section, the fixing section is connected to the top rod, and the supporting section extends upward from the upper end of the top rod and is used to support the upper pull strap assembly.

Implementation Method

[0015] In order to make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0016] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "level", "top", "bottom", "inner", "outer" etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention 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. Therefore, they should not be construed as limitations on the present invention.

[0017] Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0018] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0019] The top tether (also known as the top strap) is an attachment used to secure child safety seats, designed to improve seat stability and reduce forward rotation during a collision. The top tether is a flexible webbing or rope extending from the top of the child seat. One end has a hook that connects to an anchor point inside the vehicle, and the other end is secured to the back or top of the child safety seat's backrest. When not in use, the top tether hangs naturally along the rear side of the backrest and is concealed by it. Therefore, when caregivers remove the child safety seat from its packaging or install it in the car seat, they sometimes overlook the top tether, failing to attach it to the anchor point and creating a safety hazard. Additionally, some child safety seats use electronic alarms to remind caregivers to attach the top tether, but existing electronic alarms are expensive and not always reliable.

[0020] Figures 1 to 8 and 10 schematically illustrate a child safety seat 1000 according to an embodiment of the present invention. The child safety seat 1000 of this embodiment includes a seat body 100 and a top strap mechanism 4 connected to the seat body 100. One end of the top strap mechanism 4 is connected to the seat body 100. The seat body 100 and the top strap mechanism 4 will be described below concurrently with the description of the child safety seat 1000.

[0021] Referring to Figures 1 and 4. The seat body 100 includes a headrest 1, a backrest 2, and a seat 3. One end of the backrest 2 is connected to the headrest 1, and the other end is connected to the seat 3. The headrest 1 is located in front of the backrest 2. The headrest 1 can be slidably connected to the backrest 2, thereby adjusting the extension length of the headrest 1 relative to the backrest 2 in the longitudinal direction to accommodate children of different ages. The seat 3 may include an ISOFIX connector 31. The ISOFIX connector 31 is located approximately at the rear end of the seat 3 and can be connected to a car seat. The seat 3 may also be secured to the car seat by a car seat belt instead of the ISOFIX connector 31.

[0022] The top strap mechanism 4 includes an upper tether assembly 41 and a retainer 42. The upper tether assembly 41 may include a webbing 411. One end of the upper tether assembly 41 is a fixed end, which is fixedly connected to the backrest 2 of the child safety seat 1000 by means of sewing or the like. The other end is a free end, and a hook or other connecting member is provided on the free end. The upper tether assembly 41 can be detachably connected to the anchor point of the car seat through the connecting member at the free end. In addition, the upper tether assembly 41 may also be provided with a length adjusting member 414 for adjusting the length of the webbing 411.

[0023] Referring to Figures 1 and 4 to 8, when the upper strap assembly 41 is connected to the car seat and its length is adjusted to tension, the top strap mechanism 4 is in use (see Figure 1), and the top strap mechanism 4 helps to secure the child safety seat 1000 to the car seat. Referring to Figures 2 and 3, when the upper strap assembly 41 is not connected to the car seat, the top strap mechanism 4 is in a relaxed state and hangs naturally. The retainer 42 is an elastic member and is connected to both the seat body 100 and the upper strap assembly 41. When the upper strap assembly 41 is in a relaxed state (i.e., not connected to the car seat), the retainer 42 applies an upward force to the upper strap assembly 41, thereby supporting the upper strap assembly 41 so that the upper strap assembly 41 protrudes upward relative to the backrest 2, so that when the caregiver looks from the front towards the backrest 2, at least a portion of the upper strap assembly 41 can be observed not to be obscured by the backrest 2. When the upper pull strap assembly 41 is adjusted to a tensioned state, for example by the length adjustment member 414, the upper pull strap assembly 41 can press against the retaining member 42, causing the retaining member 42 to elastically deform. The upper pull strap assembly 41 protrudes upward relative to the backrest 2, meaning that the retaining member 42 supports the upper pull strap assembly 41 so that it protrudes along the length of the backrest body 20 on the side where the backrest body 20 is connected to the headrest 1. In some embodiments, the upper pull strap assembly 41 can be configured such that when the headrest 1 is adjusted to be no higher than the backrest 2, the upper pull strap assembly 41 can be observed when looking from the front towards the backrest 2. In some other embodiments, the upper pull strap assembly 41 can be configured such that within the sliding range of the headrest 1 relative to the backrest 2, the upper pull strap assembly 41 can be observed when looking from the headrest 1 towards the backrest 2. In one embodiment, the headrest 1 is slidably connected to the backrest 2, and when the headrest 1 slides to its highest point on the backrest 2, the top strap assembly 41 can be observed when looking from the headrest 1 towards the backrest 2. In this embodiment, the top strap assembly 41 is held in a state of protruding upward relative to the backrest 2 by a retainer 42, preventing it from being obscured by the backrest 2 when not in use, thereby reminding the caregiver to connect the top strap mechanism 4 to the car seat.

[0024] Referring to Figures 3, 6 to 8. The retainer 42 includes a fixing section 421 and a support section 422 connected to the fixing section 421. The fixing section 421 may be integrally formed with the support section 422 or otherwise connected together. The backrest 2 includes a backrest body 20 and left and right side wing plates 22 extending from the backrest 2 to the left and right sides. The fixing section 421 may be connected to the backrest body 20 or the side wing plates 22, which is not limited here. When the top strap mechanism 4 is in a relaxed state, the support section 422 extends upward from the upper edge 202 of the backrest body 20 and is used to support the pull strap assembly 41. The upper edge 202 of the backrest body 20 is the circumferential edge of the backrest body 20 on the side where the backrest 2 is connected to the headrest 1. However, although the retainer 42 shown in the figures is connected to the backrest body 20 of the backrest 2, the present invention is not limited thereto, and those skilled in the art will understand that the retainer 42 may also be connected to the headrest 1. For example, when the retainer 42 is connected to the headrest 1, the shape of the retainer can be seen with reference to FIG14. One end of the retainer 42 forms a fixing part 423 connected to the headrest 1, and the other end forms a ring-shaped or C-shaped retaining part 424. The retaining part 424 is positioned higher than the headrest 1. The retaining part 424 is sleeved on the upper pull strap assembly 41. When the headrest 1 moves up and down relative to the backrest 2, the retaining part 424 drives the upper pull strap assembly 41 to move up and down, so that the upper pull strap assembly 41 is not obstructed by the headrest 1. When the top strap mechanism 4 is in a relaxed state, the retainer 42 can support the upper pull strap assembly 41 to protrude upward relative to the backrest 2, so that the upper pull strap assembly 41 can be observed when looking from the front towards the backrest 2. The "looking from the front towards the backrest 2" mentioned in this application includes the angle at which the caregiver observes the child safety seat 1000 when standing directly in front of or to the side of the child safety seat 1000. In this embodiment, since the retainer 42 can support the top strap assembly 41 to protrude upward relative to the backrest 2, the caregiver can easily observe the top strap mechanism 4 when standing directly in front of or to the side of the child safety seat 1000.

[0025] Figures 3, 12, and 13 illustrate several exemplary forms of the support segment 422 of the retainer. In the embodiment shown in Figure 3, the support segment 422 includes a first curved segment 4221 that can bend from the upper edge 202 of the backrest 2 toward the rearward and upward of the backrest 2, thereby keeping the upper pull strap assembly 41 in a protruding state relative to the backrest 2 to alert the caregiver to the use of the top strap mechanism 4. When the child safety seat 1000 is placed on the car seat, the support segment 422 of the retainer 42 is pressed against the backrest of the car seat and bends in a vertical direction, thereby pulling the upper pull strap assembly 41 upward, making it more noticeable to the caregiver. At the same time, this arrangement guides the bending direction of the retainer 42, preventing swaying and bending to the left or right, which would cause the upper pull strap assembly 41 to be obscured by the headrest 1. Optionally, a guide space 2021B for the rearward bending of the retainer 42 is formed at the top of the mounting groove 2021, the specific structure of which is described below. In the embodiment shown in FIG13, the retainer 42 further includes a second curved section 4222. The support section 422 includes a first curved section 4221 and a second curved section 4222. The first curved section 4221 extends upward from the upper edge 202 and extends a distance toward the rear of the backrest 2. The second curved section 4222 is connected to the first curved section 4221 and bends toward the front of the backrest 2, thereby keeping the top strap assembly 41 in an upwardly curved state relative to the backrest 2 to remind the caregiver to use the top strap mechanism 4. A portion of the first curved section 4221 may be located behind the backrest 2. Optionally, a portion of the second curved section 4222 may be located in front of the backrest 2 or the headrest 1. When the child safety seat 1000 is placed on the car seat, the first curved segment 4221 of the seat backrest abuts the retainer 42 and moves forward. The retainer 42 includes a second curved segment 4222 that curves towards the headrest 1, allowing a portion of the pull strap assembly 41 to naturally droop down in front of the headrest 1, thus reminding the caregiver to install the pull strap assembly 41. In other embodiments, the retainer 42 may also include only the second curved segment 4222, with the length and angle of the second curved segment 4222 configured to allow a portion of the pull strap assembly 41 to droop down in front of the headrest 1. In the embodiment shown in FIG12, the support segment 422 may also be configured to extend substantially straight along the length of the backrest 2, thereby keeping the pull strap assembly 41 upright relative to the backrest 2. For example, the retainer 42 is a cylindrical compression spring. The fixing section 421 of the retainer 42 can be vertically inserted into the backrest 2. The supporting section 422 is integrally formed with the fixing section 421 and is arranged to extend approximately straight along the length of the backrest 2. The retainer 42, in this configuration, can support the upper pull strap assembly 41 so that one end is vertical and higher than the backrest 2, to prevent the caregiver from forgetting to connect the top strap mechanism 4 to the car seat.

[0026] The retainer 42 can be a compression spring, tension spring, herringbone spring, spring sheet or gooseneck tube, or other forms, as long as it can support the upper pull strap assembly 41 of this embodiment in the non-use state so that it protrudes upward relative to the backrest 2.

[0027] Referring to Figures 1 to 8, in this embodiment, the retainer 42 is a long strip-shaped compression spring. The lower end of the retainer 42 is fixed to the top of the housing of the backrest 2, and the upper end extends upward toward the backrest 2. The upper end of the retainer 42 is sewn onto the upper pull strap assembly 41 to support a portion of the webbing of the upper pull strap assembly 41 near the fixed end protruding upward toward the backrest 2. Referring to Figures 2 and 3, when the upper pull strap assembly 41 is in the unused state, the support section 422 of the retainer 42 supports a portion of the upper pull strap assembly 41 above the backrest 2, thereby alerting the user. Referring to Figures 1 and 4-8, when the upper pull strap assembly 41 is in use, that is, when the free end of the upper pull strap assembly 41 is engaged on the car seat and the length of the upper pull strap assembly 41 is adjusted to tension the upper pull strap assembly 41, the support section 422 of the retainer 42 undergoes elastic deformation under the compression of the upper pull strap assembly 41 and bends along the direction of extension of the upper pull strap assembly 41 (see Figure 1), thereby avoiding obstruction of the normal installation of the upper pull strap assembly 41.

[0028] Referring to the embodiments shown in Figures 12, 15 to 20, the retainer 42 can also be a tension spring. The lower end of the retainer 42 is fixed to the inner housing 204 of the backrest 2, and the upper end of the retainer 42 is inserted into the length adjustment member 414. Referring to Figure 18, when the upper pull strap assembly 41 is in an unused state, the support section 422 of the retainer 42 supports a portion of the upper pull strap assembly 41 above the backrest 2, thereby making it noticeable to the caregiver. Referring to Figures 12, 15 to 17 and 20, by adjusting the length adjustment member 414 to tension the upper pull strap assembly 41, the support section 422 of the retainer 42 is compressed towards the lower end of the retainer 42 under the pressure of the upper pull strap assembly 41, thereby avoiding obstruction of the normal installation of the upper pull strap assembly 41.

[0029] In one or more embodiments, as shown in Figures 11 and 14, the retainer 42 may also be a spring made of metal or rubber. The fixing segment 421 of the retainer 42 is connected to the upper edge 202 of the backrest 2. Exemplarily, the retainer 42 may be fixed by means of insertion, riveting, or detachable means of engagement. The support segment 422 is connected to the fixing segment 421 and includes a retaining portion 424, which is annular and sleeved on the upper pull strap assembly 41 to prevent the upper pull strap assembly 41 from detaching from the retaining portion 424. Applying pressure to the support segment 422 can cause the support segment 422 to bend forward toward the backrest 2, reducing the height of the child safety seat 1000, which helps to save space in the packaging box when the child safety seat 1000 is packaged as a whole. When the pressure is released, for example, when the child safety seat 1000 is removed from the packaging, the retainer 42 will spring upward as the pressure applied to it by the packaging is removed. This causes a portion of the top tether assembly 41 to protrude from the backrest 2, thereby attracting the caregiver's attention and reminding them to install the top tether mechanism 4. Referring to Figures 6 and 7, in this embodiment, the backrest 2 includes a fastener 206 connected to the backrest body 20, and the fixing section 421 is connected to the backrest body 20 via the fastener 206. The fastener 206 can be a rivet, bolt, screw, etc., as long as it can connect the fixing section 421 to the backrest body 20. The fixing section 421 includes a mounting ring 4211. The backrest body 20 includes an inner cavity 205 and a locking post 2041 protruding into the inner cavity 205. The mounting ring 4211 is fitted onto the locking post 2041 and locked by a fastener 206. The upper edge 202 includes a mounting groove 2021 leading to the inner cavity 205, and a retainer 42 extends from the mounting groove 2021. Specifically, the backrest body 20 may include an outer shell 203 facing away from the headrest 1 and an inner shell 204 facing the headrest 1. The outer shell 203 and the inner shell 204 may be connected together (e.g., by snap-fit, threaded connection, riveting, or other means) to form the inner cavity 205 of the backrest body 20. The fixing section 421 may include a mounting ring 4211. For example, the retainer 42 may be a tension spring, and the mounting ring 4211 is a loop formed by winding the end wire of the tension spring. The inner housing 204 may include a locking post 2041 protruding from the inner surface 2043 (facing the outer housing 203) of the inner housing toward the outer housing 203. A mounting ring 4211 may be fitted onto the locking post 2041. The locking post 2041 includes a locking hole 2041A into which a fastener 206 may be inserted to engage with the locking post 2041, thereby locking the mounting ring 4211 onto the locking post 2041. The inner housing 204 may also include a receiving portion 2042 communicating with the inner cavity 205, a retainer 42 being secured to the back of the body 20 by the mounting ring 4211 and extending through the receiving portion 2042, and then extending out from the mounting groove 2021.The receiving portion 2042 prevents the retainer 42 from wobbling. Although, as shown in FIG. 6, the locking pin 2041 is configured to protrude from the inner surface 2043 of the inner housing 204 toward the outer housing 203, the locking pin 2041 may also be configured to protrude from the outer housing 203 toward the outer housing 203. Furthermore, although, as shown in FIG. 6, the inner housing 204 includes the receiving portion 2042, the inner housing 204 may also exclude the receiving portion 2042 and further secure the fixing segment 421 by other means, such as adhesive or snap-fit.

[0030] In one or more other embodiments, the retainer 42 may also be connected to the backrest 2 by welding, riveting, bonding, or plugging. In one or more embodiments, the upper pull strap assembly 41 may be provided with a pouch-shaped positioning structure, and the upper end of the retainer 42 is detachably inserted into the positioning structure (not shown); in still other embodiments, the lower end of the upper pull strap assembly 41 is provided with a locking groove, which overlaps the backrest 2 so that the caregiver can remove the retainer 42 when it is not needed.

[0031] See Figures 5, 6, and 8. The top strap assembly 41 is straight and includes a webbing 411 and a length adjustment member 414. The first end of the webbing 411 is connected to the backrest 2, and the second end can be connected to the car seat. As shown in Figure 10, when the retainer 41 is not installed, due to the softness of the webbing 411, it lies directly on the seat body 100, making it difficult for caregivers to notice the top strap mechanism 4, and thus they may easily forget to connect the top strap mechanism 4 to the car seat. The retainer 42 includes a fixing section 421 and a support section 422 connected to the fixing section 421. The fixing section 421 is connected to the backrest body 2, and when the top strap mechanism 4 is in a relaxed state, the support section 422 extends upward from the upper edge 202 of the backrest body 20 and is connected to the webbing 411. The first end of the webbing 411 can be fixedly or detachably connected to the backrest 2, and the second end can be directly connected to the car seat (e.g., fastened to the car seat) or connected to the car seat via other components. The backrest 2 may include a retaining rod 21 (see 15 and 16). The first end of the webbing 411 is connected to the retaining rod 21, and the second end of the webbing 411 is connected to the car seat. The backrest body 20 may include an outer housing 203 facing away from the headrest 1 and an inner housing 204 facing the headrest 1. The outer housing 203 and the inner housing 204 may be joined together (e.g., snap-fit, threaded, riveted, or otherwise) to form a cavity 205 of the backrest body 20. The retaining rod 21 is received in the cavity 205 and connected to the backrest body 20. The upper edge 202 of the backrest 2 has an upper pull strap through groove 2022 for mounting the webbing 411 and a mounting groove 2021 for mounting the retainer 42, which leads to the cavity 205. The mounting groove 2021 slopes forward from bottom to top. The fixing section 421 is inserted into the mounting groove 2021 at a forward-sloping angle. The top of the mounting groove 2021 has a rearward-protruding abutment 2021A. The abutment 2021A abuts against the rearward warping of the support section 422, thereby providing a preset tension to the retainer 42. The first end of the webbing 411 is connected to the fixing rod 21 and extends from the inner cavity 205 through the abutment 2021A and is supported by the support section 422.

[0032] See Figures 4, 6, and 10. The second end of the webbing 411 can be directly connected to the car seat (not shown) or connected to the car seat via other components. The pull strap assembly 41 may include a latch 412, which is adjustablely connected to the second end of the webbing 411 so that the webbing 411 can be moved via the latch 412 by pulling the second end of the webbing 411, thereby adjusting the length of the webbing 411 between the latch 412 and the backrest 2. The latch 412 can be a hook or other form, as long as it can connect the webbing 411 to the car seat.

[0033] Referring to Figure 8, this figure illustrates the connection between the webbing 411 and the retainer 42. The top zipper assembly 41 may also include a pocket 415 connected to the webbing 411. The pocket 415 may be sewn, glued (e.g., heat-fused) to the webbing 411, or it may be integrally formed with the webbing 411 (e.g., by weaving the webbing 411 to form the pocket 415). The pocket 415 may be made of the same material as the webbing 411 or a different material. The fixing section 421 is connected to the backrest 2, and the support section 422 may be enclosed in the pocket 415, thereby covering the entire retainer 42 and making the top zipper mechanism 4 more aesthetically pleasing. The fixing section 421 may also be detachably connected to the backrest 2, and the support section 422 may be fitted into the pocket 415, thereby facilitating the replacement, maintenance, or removal of the retainer 42. The top zipper assembly 41 may also include a protective sleeve 413. The protective sleeve 413 is accommodated in the pocket 415 and sleeves the support segment 422. The retainer 42 can be an elastic element, and the protective sleeve 413 can be flexible, such as a soft rubber sheath, so that when the webbing 411 is moved to tension it, the protective sleeve 413 can be compressed together with the retainer 42. The protective sleeve 413 prevents the retainer 42 from rubbing against the pocket 415, thereby making the webbing 411 robust and durable. In other embodiments, the retainer 42 may also be sewn onto the webbing 411.

[0034] Refer to Figures 4, 5, and 6. The length adjusting member 414 is adjustablely connected to the webbing 411 to control the length of the webbing 411. Referring to Figure 6, the support segment 422 can be connected to the length adjusting member 414. For example, the support segment 422 can be connected to the length adjusting member 414 by adhesive, hook, snap, etc. Operating the length adjusting member 414 to adjust the length of the webbing 411 connected between the backing portion 2 and the length adjusting member 414 can tension or slack the webbing 411. When the length adjusting member 414 is operated to tension the webbing 411, the retaining member 42 can be configured to bias the length adjusting member 414 in the direction that slacks the webbing 411. Furthermore, although the length adjusting member 414 is shown in the figures, this embodiment can be implemented without the length adjusting member 414. When the pull strap assembly 41 does not include the length adjusting member 414, as described above, the support segment 422 can be connected to the webbing 411.

[0035] Referring to Figures 1, 5, and 9, the length adjustment member 414 may include a display window 4140. The top strap mechanism 4 may also include an indicator 43. The indicator 43 includes a first indicator area 431 and a second indicator area 432. When the webbing 411 is pulled to tension it between the backrest 2 and the length adjustment member 414, the first indicator area 431 of the indicator 43 faces the display window 4140, and when the webbing 411 is loosened to slack it between the backrest 2 and the length adjustment member 414, the second indicator area 432 of the indicator 43 faces the display window 4140. The first indicator area 431 and the second indicator area 432 may be displayed in different colors. For example, the first indicator area 431 may be displayed in green, and the second indicator area 432 may be displayed in red. Thus, by observing the display of indicator 43 in display window 4140, the caregiver can easily know the status of webbing 411, prompting the caregiver to tighten webbing 411 as needed, thereby further reminding the caregiver to connect the top strap mechanism 4 to the car seat. The first indicator area 431 and the second indicator area 432 can also be displayed in other ways, such as in text.

[0036] According to another embodiment of this application, referring to FIG9, the pull strap assembly 41 can be Y-shaped. When the pull strap assembly 41 is Y-shaped, the webbing 411 can include a first webbing segment 4111 and a second webbing segment 4112 connected to the first webbing segment 4111. The first webbing segment 4111 can be integrally formed with the second webbing segment 4112 or otherwise connected together. The first webbing segment 4111 and the second webbing segment 4112 are respectively connected to opposite sides of the backrest portion 2. The first webbing segment 4111 and the second webbing segment 4112 can extend from opposite sides of the upper edge 202. The pull strap assembly 41 can be connected to a car seat between the first webbing segment 4111 and the second webbing segment 4112, for example, by means of a snap fastener 412, thereby making the pull strap assembly 41 generally Y-shaped. The retainer 42 is connected to and supports the webbing segment where the length adjusting member 414 is located, so that the webbing segment (shown as the first webbing segment 4111 in the figure) protrudes upward from the backing portion 2 and is supported by the retainer. Optionally, the top strap mechanism 4 may also include two retainers 42, which are respectively connected to the first webbing segment 4111 and the second webbing segment 4112.

[0037] According to another embodiment of this application, referring to Figures 15 to 20, in this embodiment, a mounting groove 2021 is formed on the upper edge 202 of the backrest 2 for the retainer 42 to be inserted therein. As shown in Figures 16, 17 and 20, the mounting groove 2021 extends from the upper edge 202 along the longitudinal direction (the length direction of the backrest 2) from bottom to top on the inner housing 204 of the backrest 2. The fixing segment 421 is inserted into the mounting groove 2021 along the mounting groove 2021. Referring to Figure 20, the retainer 42 is vertically inserted into the mounting groove 2021, and the fixing segment 421 and the support segment 422 are integral parts and extend in the same direction. The width of the top of the mounting groove 2021 is greater than the width of the bottom, the top of the mounting groove 2021 is fan-shaped, and a guide space 2021B is formed at the top of the mounting groove 2021. Under the pressure of the webbing 411, the support section 422 of the retainer 42 can bend in the front-back direction to prevent the retainer 42 from bending in the left-right direction and being blocked by the headrest 1. It also prevents the retainer 42 from being damaged due to excessive bending. The backrest 2 includes a support frame 207, the surface of which has a groove 2071 for accommodating the retainer 42, forming part of the mounting groove 2021. When the retainer 42 is inserted into the mounting groove 2021, the support frame 207 can engage and support the retainer 42 from back to front. The depth of the top of the groove 2071 of the support frame 207 is greater than the depth of the bottom, and a guide space 2021B is formed at the top of the groove 2071 of the support frame 207. The support frame 207 secures the end of the fixing section 421 to the inner housing 204 of the backrest 2. As shown in Figures 16 and 17, the fixing segment 421 may include a mounting ring 4211, and one end of the support frame 207 is fixed to the inner housing 204 by rivets. The other end of the support frame 207 is tilted forward to support the rearwardly warped support segment 422. In this embodiment, an upper pull strap groove 2022 is also formed on the upper edge 202 of the backrest 2 to allow the webbing 411 to pass through it. The upper pull strap groove 2022 is located on the front side of the mounting groove 2021. Optionally, the upper pull strap groove 2022 may also be located on the rear side of the mounting groove 2021, or the upper pull strap groove 2022 and the mounting groove 2021 may be the same groove. The upper pull strap groove 2022 extends from the upper edge 202 along the longitudinal direction on the inner housing 204 of the backrest 2. As shown in Figures 17 and 20, the upper pull strap groove 2022 extends from the upper edge 202 toward the bottom of the backing part 2 in a zigzag pattern, thereby guiding the webbing 411 around the fixing section 421 and preventing the webbing 411 from getting tangled with the retainer 42.The pull-up strap groove 2022 may include three interconnected sections. The first groove section 2022A extends longitudinally from the fixing point of the webbing 411 to a position approximately at the same level as the fixing section 421 of the retainer 42. The second groove section 2022B extends laterally from the same level as the fixing section 421 of the retainer 42. The third groove section 2022C slopes backward from the upper edge 202, thereby bringing the webbing 411 close to the retainer 42 above the backing portion 2. The specific structure of the top strap mechanism 4 is basically the same as in the aforementioned embodiment and will not be described again here.

[0038] According to another embodiment of this application, a child safety seat 1000 is provided. The child safety seat 1000 of this embodiment includes a seat body 100 and a top strap mechanism 4, wherein the seat body 100 includes a base and a seat portion 3 mounted on the base. A backrest portion 2 is disposed on the seat portion 3. A top bar is provided at the rear end of the base for abutting against the backrest of the vehicle seat to prevent the child safety seat 1000 from rolling over. The top bar is located behind the backrest portion 2. One end of the top strap mechanism 4 is connected to the top bar. The top strap mechanism 4 includes an upper pull strap assembly 41 and a retainer 42. One end of the upper pull strap assembly 41 is connected to the upper end of the top bar, and the other end is provided with a hook for engaging the vehicle seat anchor point. One end of the retainer 42 is connected to the top bar, and the other end is connected to the upper pull strap assembly 41. The retainer 42 is an elastic member and applies an upward force to the upper pull strap assembly 41, thereby supporting the upper pull strap assembly 41 to protrude upward relative to the seat body 100, thus serving to alert the caregiver. The specific structure of the top strap mechanism 4 is basically the same as that of the aforementioned embodiment, and will not be described again here.

[0039] The technical features of the above embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-described embodiments are merely illustrative of several implementations of the present invention, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims. [Simplified Explanation of the Diagram]

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In addition, the drawings are not drawn to a 1:1 scale, and the relative dimensions of each element are only illustrated in the drawings and are not necessarily drawn to a true scale. In the drawings: FIG1 schematically shows a perspective view of a child safety seat from the backrest to the front according to an embodiment of the present invention, wherein the top strap mechanism is connected to the car seat. FIG2 schematically shows a perspective view of a child safety seat from the front to the backrest according to an embodiment of the present invention, wherein the top strap mechanism is not connected to the car seat. FIG3 schematically shows a left view of a child safety seat according to an embodiment of the present invention, wherein the top strap mechanism is in a warped state relative to the headrest. FIG4 schematically shows a front view of a child safety seat according to an embodiment of the present invention. FIG5 schematically shows a top view of a child safety seat according to an embodiment of the present invention. Figure 6 schematically shows a perspective view and a partial enlarged view of a child safety seat according to an embodiment of the present invention, wherein the backrest housing has been removed. Figure 7 schematically shows a perspective view and a partial enlarged view of a child safety seat according to an embodiment of the present invention, wherein the retainer is not yet attached to the backrest. Figure 8 schematically shows a cross-sectional view along section line AA of the child safety seat shown in Figure 4 and a partial enlarged view. Figure 9 schematically shows a top view of a child safety seat according to yet another embodiment of the present invention. Figure 10 schematically shows a rear view of a child safety seat according to an embodiment of the present invention, wherein the retainer has been removed. Figure 11 schematically shows a perspective view of a child safety seat according to an embodiment of the present invention, wherein the retainer is a spring. Figure 12 shows a perspective view of a child safety seat according to yet another embodiment of the present invention, wherein the retainer extends parallel to the headrest. Figure 13 shows a side view of a child safety seat according to yet another embodiment of the present invention, wherein the retainer is bent relative to the headrest. And Figure 14 schematically shows the retainer according to an embodiment of the present invention. Figure 15 schematically shows a side view and a partial enlarged view of a child safety seat according to another embodiment of the present invention, wherein the backrest housing has been removed and the top strap assembly is connected to the retaining rod. Figure 16 schematically shows an exploded view of a child safety seat according to another embodiment of the present invention. Figure 17 schematically shows a cross-sectional view of the child safety seat shown in Figure 12 along section line BB, wherein the retainer and backrest housing are detached from the child safety seat. Figure 18 schematically shows a left view of a child safety seat according to an embodiment of the present invention, wherein the top strap mechanism is in a tensioned state.Figure 19 schematically illustrates a child safety seat according to an embodiment of the present invention, wherein the top harness mechanism is in a tensioned state. Figure 20 schematically illustrates a cross-sectional view and a partial enlarged view of the child safety seat shown in Figure 12 along section line BB.

Claims

1. A child safety seat, comprising a seat body and a top harness mechanism, wherein the top harness mechanism is connected to the backrest portion of the seat body, wherein, The top strap mechanism includes: an upper tether assembly, one end of which is connected to the seat body and the other end of which is provided with a locking member for engaging the vehicle seat; and a retainer, which is connected to the seat body and the upper tether assembly respectively. The retainer is an elastic member and applies an upward force to the upper tether assembly so that the retainer can support the upper tether assembly to protrude upward relative to the child safety seat. When the upper tether assembly is in a relaxed state, the retainer can support the upper tether assembly to protrude upward relative to the backrest. When the upper tether assembly is in a tensioned state, the upper tether assembly can press against the retainer, causing the retainer to undergo elastic deformation.

2. The child safety seat as claimed in claim 1, wherein the retainer includes a fixed section and a support section connected to the fixed section, the fixed section being connected to the backrest, and the support section extending upward from the upper edge of the backrest and supporting the top tether assembly when the top tether mechanism is in a slack state.

3. The child safety seat as claimed in claim 2, wherein the support segment includes a first curved segment that curves rearward from the upper edge away from the backrest.

4. The child safety seat as claimed in claim 2 or 3, wherein the support section includes a second curved section that extends forward toward the backrest, thereby holding the upper tether assembly in front of the backrest.

5. The child safety seat as claimed in claim 2, wherein a mounting groove and an upper tether strap through groove are formed from the upper edge of the backrest, the fixing segment is inserted into the mounting groove; the upper tether strap assembly passes through the upper tether strap through groove; the width of the top of the mounting groove is greater than the width of the bottom to form a guide space for the retainer at the top of the mounting groove.

6. The child safety seat as claimed in claim 5, wherein the mounting slot is inclined forward from bottom to top, the fixing segment is inclinedly inserted into the mounting slot along the mounting slot, and the top of the mounting slot is provided with a rearwardly projecting abutment, the abutment abutting against the rearward warping of the support segment so that the extension directions of the fixing segment and the support segment are different.

7. The child safety seat as claimed in claim 2, wherein the backrest includes a fastener connected to the backrest body, the fixing segment is connected to the backrest body by the fastener, the fixing segment includes a mounting ring, the backrest body includes an outer shell and an inner shell connected together to form an inner cavity, the backrest body further includes a locking post protruding from one of the outer shell and the inner shell into the inner cavity, the mounting ring is fitted onto the locking post and locked by the fastener, the upper edge includes a mounting groove leading to the inner cavity, and a retainer extends outward from the mounting groove.

8. The child safety seat as claimed in claim 2, wherein the pull strap assembly includes a webbing and a length adjuster, a first end of the webbing being connected to the backrest and a second end being provided with the engaging member; the length adjuster is threaded through the webbing for adjusting the length of the webbing; and the support segment is connected to the webbing or the length adjuster.

9. The child safety seat as claimed in claim 1, wherein the pull strap assembly is Y-shaped, the pull strap assembly includes a webbing and a locking member threaded on the webbing; the locking member divides the webbing into a first webbing segment and a second webbing segment connected to the first webbing segment, the first webbing segment and the second webbing segment being respectively connected to opposite sides of the backrest, the first webbing segment being provided with a length adjustment member, and the retaining member being connected to the first webbing segment.

10. The child safety seat as claimed in claim 2, wherein the retainer is at least one of a compression spring, a tension spring, a herringbone spring, a leaf spring, and a gooseneck tube; wherein, The support section is sewn onto the upper zipper assembly; or the upper zipper assembly has a pocket, and the support section is fitted into the pocket.

11. The child safety seat as claimed in claim 1, wherein the seat body further includes a top rod disposed behind the backrest, one end of the pull strap assembly is connected to the top rod of the seat body, the retainer includes a fixed section and a support section connected to the fixed section, the fixed section is connected to the top rod, and the support section extends upward from the upper end of the top rod and is used to support the pull strap assembly.

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