Child carrier

Abstract

A child carrier includes: a backrest assembly (2) including a cross bar (23); and a booster (3). The booster includes: a booster body (31) having a lower surface (31b) provided with a mating groove (311) configured to receive the cross bar; and a connecting mechanism (32) disposed on the booster body, and including a locking member (321). The booster is connected to the backrest assembly by the connecting mechanism. The locking member is movably connected to the booster body and switchable between an unlocked position and a locked position. An end of the locking member forms a hook part (3211) configured to be engaged with the cross bar. The locking member, when in the locked position, is engaged with the backrest assembly to allow the booster to be connected to the backrest assembly. The locking member, when in the unlocked state, is disengaged from the backrest assembly to allow the booster to be separated from the backrest assembly.

Description

CHILD CARRIERCROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese patent application No. 2024101783996, filed on February 08, 2024, Chinese patent application No. 2023116354931, filed on November 30, 2023, Chinese patent application No. 2023112452916, filed on September 22, 2023, and Chinese patent application No. 2024110752802, filed on August 6, 2024, the contents of which are incorporated herein by reference in their entireties.TECHNICAL FIELD

[0002] The present application relates to the technical field of child products, and in particular, to a child carrier.BACKGROUND

[0003] Child safety seats provide safety for children when traveling by car. In order to extend the use period of safety seats, the child safety seats usually have multiple usage modes so that they can be used by children of different ages. At present, some child safety seats on the market are equipped with boosters and have complex structures, and it is inconvenient to detach the boosters.SUMMARY

[0004] The inventions are set out in the appended sets of claims. The dependent claims describe optional embodiments of the invention.

[0005] According to various embodiments of the present application, a child carrier is provided. In addition, the present invention also provides a booster that may be used alone, an inclination adjusting device, and a child chair having the inclination adjusting device.

[0006] According to an aspect of the present invention, a child carrier is provided, and includes: a backrest assembly including a cross bar; and a booster. The booster includes: a booster body having a lower surface, the lower surface being provided with a mating groove configured to receive the cross bar; and a connecting mechanism disposed on the booster body, and including a locking member. The booster is capable of being connected to the backrest assembly by the connecting mechanism. The locking member is movably connected to the booster body and capable of being switched between an unlocked position and a locked position. An end of the locking member forms a hook part for being engaged with the cross bar.The locking member, when in the locked position, is configured to be engaged with the backrest assembly to allow the booster to be connected to the backrest assembly. The locking member, when in the unlocked position, is configured to be disengaged from the backrest assembly to allow the booster to be separated from the backrest assembly.

[0007] According to another aspect of the present application, a booster is provided. The booster is configured to be detachably connected to a backrest assembly. The booster includes: a booster body and a connecting mechanism. The connecting mechanism is disposed on the booster body, and the booster may be connected to the backrest assembly by the connecting mechanism. The connecting mechanism includes a locking member. The locking member is movably connected to the booster body and may be switched between an unlocked position and a locked position. When the locking member is in the locked position, the locking member is engaged with the backrest assembly to allow the booster to be connected to the backrest assembly. When the locking member is in the locked position, the locking member is disengaged from the backrest assembly to allow the booster to be separated from the backrest assembly.

[0008] In an embodiment, the unlocking member is pivotally connected to the booster body, so that the unlocking member may pivot between the first position and the second position. An angle between the unlocking member in the second position and the booster body is greater than an angle between the unlocking member in the first position and the booster body.

[0009] In an embodiment, the locking member includes a pivoting part pivotally connected to the booster body and a driving part connected to the pivoting part. The unlocking member has a third position between the first position and the second position and is provided with a pivoting recess. The pivoting part is at least partially received in the pivoting recess. The driving part may at least partially extend out of the pivoting recess. When the unlocking member pivots to the third position, an end of the pivoting recess may push against the driving part to drive the locking member to pivot.

[0010] In an embodiment, the booster body is further provided with a channel. At least a portion of the locking member may extend into the receiving groove via the channel to be connected to the unlocking member.

[0011] In an embodiment, a pivot axis of the locking member pivoting relative to the booster body and a pivot axis of the unlocking member pivoting relative to the booster body are collinear or parallel to each other.

[0012] In an embodiment, the booster body has a lower surface configured to be placed on a car seat. The lower surface is provided with a mating groove. The mating groove is configured to at least partially receive the backrest assembly.

[0013] In an embodiment, the upper surface of the booster body is provided with a storage recess configured for storage of items. An openable cover is disposed at an opening of the storage recess. The cover has an opened state and a closed state. An openable mechanism is disposed on the cover, and is configured to lock the cover in the closed state.

[0014] In an embodiment, the booster body is provided with an engaging hole, and the openable mechanism includes an openable unlocking member. The openable unlocking member is movably disposed on the cover and has a first position and a second position. The openable unlocking member has an engaging end and an operable unlocking member. When the openable unlocking member is in the first position, the engaging end may be engaged with the engaging hole. When the openable unlocking member is in the second position, the engaging end is separated from the engaging hole.

[0015] In an embodiment, the openable mechanism further includes an openable reset member disposed between the cover and the openable unlocking member. The openable reset member abuts against the openable unlocking member to bias the openable unlocking member to move toward the first position.

[0016] In an embodiment, an accommodating recess is formed in the cover, and an operation port in communication with the accommodating recess is disposed on the upper surface of the cover. The openable unlocking member is movably disposed in the accommodating recess. When the openable unlocking member is in the first position, the unlocking member faces the operation port. When the openable unlocking member is in the second position, the engaging end extends out of the accommodating recess to be engaged with the engaging hole.

[0017] In an embodiment, the booster further includes armrest parts. The armrest parts are disposed on two sides of the booster body respectively. A first hole through which a car safetybelt extends is formed between each of the armrest parts and the booster body.

[0018] In an embodiment, the booster further includes a cup holder. Each armrest part includes a first armrest part located in front of the first hole and a second armrest part located behind the first hole. At least one first armrest part is provided with a holder recess. The cup holder includes a storage cup. A connecting protrusion is disposed on a sidewall of the storage cup. The holder recess is provided with an entrance groove in communication with a limiting hole. The connecting protrusion enters into the limiting hole through the entrance groove and is locked in the limiting hole to fix the cup holder at the holder recess.

[0019] In an embodiment, the bottom wall of the storage cup is provided with a connecting column, the holder recess is provided with a first connecting hole. The connecting column is inserted into and mated with the first connecting hole. The holder recess is further provided with a plurality of deformation holes axially symmetrically distributed on two sides of the limiting hole.

[0020] According to another aspect of the present application, a child carrier is provided. The child carrier includes a seat assembly. The seat assembly includes a backrest assembly and a booster in any one of the above embodiments. The booster is detachably connected to the backrest assembly.

[0021] In an embodiment, the backrest assembly includes a backrest body, a mating rib and a cross bar. An end of the mating rib is connected to the backrest body, and another end of the mating rib is connected to the cross bar.

[0022] In an embodiment, the backrest assembly further comprises a base. The backrest body is connected to the base by the mating rib, and a gap is formed between the cross bar and the base.

[0023] In an embodiment, the seatbelt-adjustment unlocking member is pivotally connected to the booster body of the booster via a pivot shaft. The pivot shaft is connected to an end of the operating section away from the driving end.

[0024] In an embodiment, the booster body of the booster is provided with a through passage. The seatbelt-adjustment unlocking member is movably disposed in the through passage and may at least partially extend out of the through passage.

[0025] In an embodiment, the child carrier further includes a seat pad. The seat padincludes a first pad. An end of the first pad is connected to the booster, and serves as a pivoting end to allow the first pad to be turned over between a folded position and an unfolded position. When the first pad is in the folded position, a cover of the booster is operable to allow the cover to be opened or closed.

[0026] In an embodiment, the seat pad further includes a second pad. The second pad is connected to the booster and covers at least a portion of the booster. The second pad is provided with an avoidance recess to allow the cover to be exposed via the avoidance recess. When the first pad is in the unfolded position, the first pad and the second pad collectively cover the upper surface of the booster.

[0027] In an embodiment, the pivoting end defines a pivot axis of the seat pad. The booster is provided with a second hole through which the connecting strap assembly extends through. The pivot axis of the seat pad is located between the backrest body of the backrest assembly and the second hole.

[0028] In an embodiment, the pivoting end is connected between a first side of the booster body of the booster located on the cover and the backrest body of the backrest assembly.

[0029] According to another aspect of the present invention, a child carrier is provided. The child carrier includes: a backrest assembly; a booster, removably attached to the backrest assembly; a base; and an inclination adjusting device. The backrest assembly is slidably disposed on the base to change an inclination angle of the booster relative to the base. The backrest assembly includes a backrest body, and a mating rib connected to the backrest body; and the mating rib is slidably disposed on the base. The inclination adjusting device includes: an engaging mechanism connected between the base and the mating rib, and capable of being switched between a locked position and an unlocked position. When the engaging mechanism is in the locked position, the mating rib is prevented from sliding relative to the base; and when the engaging mechanism is in the unlocked position, the mating rib is allowed to slide relative to the base; and an operating assembly movably disposed on the booster, wherein the operating assembly is connected to the engaging mechanism in a driven manner, and is capable of being separated from the engaging mechanism; and the operating assembly is operable to drive the engaging mechanism to switch from the locked position to the unlocked position.

[0030] According to yet another aspect of the present application, an inclination adjustingdevice is further provided. The inclination adjusting device is applied to a child carrier. The child carrier includes a base and a seat assembly. The seat assembly includes a backrest assembly and a seat body connected to the backrest assembly. The seat assembly is slidably disposed on the base to change an inclination angle of the seat assembly relative to the base. The inclination adjusting device is connected to the base and the seat assembly. The inclination adjusting device selectively allows or prevents a relative slide between the seat assembly and the base.

[0031] In an embodiment, the seat assembly includes a backrest assembly. The backrest assembly includes a backrest body and a mating rib connected to the backrest bod. The mating rib is slidably disposed on the base. The inclination adjusting device includes an engaging mechanism and an operating assembly. The engaging mechanism is connected between the base and the mating rib and is switchable between a locked position and an unlocked position. When the engaging mechanism is in the locked position, the mating rib is prevented from sliding relative to the base. When the engaging mechanism is in the unlocked position, the mating rib is allowed to slide relative to the base. The operating assembly is movably disposed on the seat body. The operating assembly is connected to the engaging mechanism in a driven manner and may be separated from the engaging mechanism. The operating assembly is operable to drive the engaging mechanism to switch from the locked position to the unlocked position.

[0032] According to yet another aspect of the present application, a child carrier is provided. The child carrier includes a base, a seat assembly, and the inclination adjusting device in any one of the above embodiments.

[0033] In an embodiment, the seat assembly includes a backrest assembly. The backrest assembly includes a backrest body and a mating rib connected to the backrest body. The base is provided with a mating member. One of the mating rib and the mating member is provided with a mating recess, and another of the mating rib and the mating member is provided with a mating protrusion. The mating protrusion is slidably connected in the mating recess, so that the mating rib may be slidably disposed on the base.BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings constituting a part of the present application are used to providefurther understanding of the present application. The illustrative embodiments of the present application and descriptions thereof are used to illustrate the present application and do not constitute improper limitations on the present application.

[0035] In order to illustrate the embodiments of the present application more clearly, the drawings used in the embodiments will be described briefly. Apparently, the following described drawings are merely for some embodiments of the present application, and other drawings can be derived by those of ordinary skill in the art without any creative effort.

[0036] In addition, the drawings are not drawn to a one to one scale, and the relative dimensions of the various elements are drawn only as examples in the drawings and are not necessarily drawn according to the true scale.

[0037] FIG. 1 is a perspective view showing a child safety seat according to an embodiment of the present application.

[0038] FIG. 2 is a right side view of the child safety seat shown in FIG. 1.

[0039] FIG. 3 is a front view of the child safety seat shown in FIG. 1.

[0040] FIG. 4 is a front view of the child safety seat shown in FIG. 1, with a seat belt removed.

[0041] FIG. 5 shows a perspective view and a partial enlarged view of a backrest assembly shown in FIG. 1.

[0042] FIG. 6 shows a sectional view and a partial enlarged view of the child safety seat taken along a line Ul-Ul in FIG. 2.

[0043] FIG. 7 shows a sectional view and a partial enlarged view of the child safety seat taken along a line U2-U2 in FIG. 3.

[0044] FIG. 8 shows a sectional view and a partial enlarged view of the child safety seat taken along a line U3-U3 in FIG. 4, with a connecting mechanism in a locked state.

[0045] FIG. 9 shows a sectional view and a partial enlarged view of the child safety seat taken along a line U3-U3 in FIG. 4, with a connecting mechanism in an unlocked state.

[0046] FIG. 10 is a perspective view showing a booster according to an embodiment of the present application.

[0047] FIG. 11 shows a perspective view and a partial enlarged view of the booster shown in FIG. 10 from another perspective.

[0048] FIG. 12 shows a perspective view and a partial enlarged view of the booster shown in FIG. 10 with a first booster housing removed.

[0049] FIG. 13 is a perspective view of an elastic member according to some embodiments of the present application.

[0050] FIG. 14 is a front view of the elastic member shown in FIG. 13.

[0051] FIG. 15 is a perspective view of an elastic member according to another embodiment of the present application.

[0052] FIG. 16 shows a perspective view and a partial enlarged view of a booster with a first booster housing removed according to another embodiment of the present application.

[0053] FIG. 17 shows a perspective view and a partial enlarged view of a booster according to an embodiment of the present application with a cover in an opened state.

[0054] FIG. 18 shows a sectional view and a partial enlarged view of the booster taken along a line U4-U4 in FIG. 10

[0055] FIG. 19 is a perspective view of a child safety seat according to another embodiment of the present application.

[0056] FIG. 20 is a top view of the child safety seat in FIG. 19.

[0057] FIG. 21 shows a sectional view and a partial enlarged view of the child safety seat taken along a line U5-U5 in FIG. 19.

[0058] FIG. 22 shows a sectional view and a partial enlarged view of the child safety seat taken along a line U6-U6 in FIG. 19.

[0059] FIG. 23 is a perspective view of a first operating member of the child safety seat shown in FIG. 19.

[0060] FIG. 24 shows a perspective view and a partial enlarged view of the child safety seat shown in FIG. 19 with a booster removed.

[0061] FIG. 25 shows a perspective view and a partial enlarged view of the child safety seat shown in FIG. 19 with the booster and an outer housing removed.

[0062] FIG. 26 shows a perspective view and a partial enlarged view of the child safety seat shown in FIG. 19 with the booster and an inner housing removed.

[0063] FIG. 27 is a perspective view of the booster of the child safety seat shown in FIG.19, with the booster provided with a connecting strap assembly, and with a cover in a closedstate.

[0064] FIG. 28 shows a perspective view and a partial enlarged view of the booster shown in FIG. 27 from another perspective, with the cover in an opened state.

[0065] FIG. 29 is a perspective view of the booster shown in FIG. 27 from yet another perspective, with the booster not provided with the connecting strap assembly.

[0066] FIG. 30 is a perspective view of the booster shown in FIG. 29 with a portion of a second booster housing removed.

[0067] FIG. 31 is a perspective view of the booster shown in FIG. 29 from still another perspective, with the cover in an opened state.

[0068] FIG. 32 is a perspective view of the booster in FIG. 31 with an upper cover removed, and with the cover in a closed state.

[0069] FIG. 33 is a sectional view of the booster taken along a line U7-U7 in FIG. 27.

[0070] FIG. 34 is an exploded schematic view of the booster shown in FIG. 27, with the booster not provided with the connecting strap assembly.

[0071] FIG. 35 is a perspective view of a child safety seat according to another embodiment of the present application.

[0072] FIG. 36 is an exploded schematic view of the child safety seat shown in FIG. 35, with a seat belt removed.

[0073] FIG. 37 is an enlarged view of portion A in FIG. 36.

[0074] FIG. 38 is a top view of the child safety seat shown in FIG. 35 with a portion of the seat belt removed.

[0075] FIG. 39 is a sectional view of the child safety seat taken along a line U8-U8 in FIG.38.

[0076] FIG. 40 is a perspective view of the child safety seat shown in FIG. 36, with a booster and an outer housing removed.

[0077] FIG. 41 is a perspective view of the outer housing of the child safety seat shown in FIG. 35.

[0078] FIG. 42 is a perspective view of the booster shown in FIG. 36 from another perspective, with a cover in a closed state.

[0079] FIG. 43 is a perspective view of the booster shown in FIG. 36 from yet anotherperspective, with the cover in an opened state.

[0080] FIG. 44 is a perspective view showing an openable unlocking member of the child safety seat shown in FIG. 35.

[0081] FIG. 45 is a sectional view of the booster taken along a line U9-U9 in FIG. 42.

[0082] FIG. 46 is a perspective view of the child safety seat shown in FIG. 35, with the booster removed.

[0083] FIG. 47 is a perspective view of the booster shown in FIG. 42 from another perspective.

[0084] FIG. 48 is a sectional view of the child safety seat taken along a line U10-U10 in FIG. 38.

[0085] FIG. 49 is a perspective view of the child safety seat shown in FIG. 35, provided with a seat pad, with a first pad in a folded position.

[0086] FIG. 50 is a perspective view of the child safety seat shown in FIG. 35, provided with the seat pad, with the first pad in an unfolded position.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0087] In order to make the objectives, features and advantages of the present application more obvious and easier to be understood, the specific implementations of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0088] In the description of the present application, it is to be understood that the orientation or position relationships indicated by the terms "central", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are based on the orientation or position relationships shown in the accompanying drawings and are intended to facilitate the description of the present application and simplify the description only, rather than indicating or implyingthat the apparatus or element indicated must have a particular orientation or be constructed and operated in a particular orientation, and therefore they are not to be interpreted as limiting the present application.

[0089] In addition, the terms "first" and "second" are used for descriptive purposes only, which cannot be construed as indicating or implying a relative importance, or implicitly specifying the number of the indicated technical features. Therefore, the features defined by "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the term "a plurality of" means at least two, such as two or three, unless otherwise defined explicitly and specifically.

[0090] In the present application, unless otherwise specified and defined explicitly, the terms "mounting", "connecting", "coupling", and "fixation" should be understood in a broad sense, which may be, for example, a fixed connection, a detachable connection, or an integral connection; or a mechanical connection or an electrical connection; or a direct connection, or an indirect connection via an intermediate medium, or an internal connection between two elements, or interaction between two elements. Those of ordinary skill in the art can understand specific meanings of these terms in the present application according to specific situations.

[0091] In the present application, unless otherwise explicitly specified and defined, the expression a first feature being "on" or "under" a second feature may be the case that the first feature is in direct contact with the second feature, or the first feature is in indirect contact with the second feature via an intermediate medium. Furthermore, the expression the first feature being "over", "above" and "on top of" the second feature may be the case that the first feature is directly above or obliquely above the second feature, or only means that the first feature is higher in level than the second feature. The expression the first feature being "below", "underneath" or "under" the second feature may be the case that the first feature is directly underneath or obliquely underneath the second feature, or only means that the first feature is lower in level than the second feature.

[0092] It is to be noted that when one element is referred to as being "fixed to" or "disposed on" another element, it may be directly disposed on the other element or an intermediate element may exist therebetween. When one element is considered to be "connected to" another element, it may be directly connected to the another element or an intermediate element mayexist therebetween at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used herein are for illustrative purposes only and do not represent unique implementations.

[0093] The present application provides a child carrier. The child carrier is, for example, a child safety seat, a stroller, etc. The following description is made by taking the child carrier as an example of a child safety seat. The child safety seat may be fixed to a car seat by, for example, its own ISOFIX connector, top tether, etc., or fixed to a car seat by a car safety belt disposed in the car. The child safety seat may be installed on the car seat in a forward-facing mode or in a rearward-facing mode.

[0094] FIGS. 1 to 4 are perspective views of a child safety seat 100 according to an embodiment of the present application, FIG. 19 is a perspective view of a child safety seat 100 according to another embodiment of the present application, and FIG. 35 is a perspective view of a child safety seat 100 according to yet another embodiment of the present application.

[0095] As shown in FIGS. 1 to 4, in an embodiment, the child safety seat 100 may include a seat assembly 10. The seat assembly 10 includes a backrest assembly 2 and a seat body 1. The seat body 1 is, for example, a booster 3 according to some embodiments of the present application. Hereinafter, the booster 3 and the child safety seat 100 will be described below.

[0096] As shown in FIGS. 1 to 4, in an embodiment, the booster 3 is detachably connected to the backrest assembly 2, that is, the seat body 1 is detachably connected to the backrest assembly 2. The booster 3 may be connected to the backrest assembly 2 for use (which may be referred to as a first use mode), or may be removed from the backrest assembly 2 for use alone (which may be referred to as a second use mode). In the first use mode, the booster 3 and the backrest assembly 2 collectively define a seating space of the child safety seat 100, and a child is limited in the seating space by a seat belt 4. The first use mode is applicable for children of a younger age group (e.g., one to four years old), and the child safety seat 100 in this mode may be used in the forward-facing mode or in the backward-facing mode. In the second use mode, the booster 3 and the backrest of the car seat collectively define a seating space of the booster, and the child may be limited in the seating space by the car safety belt. The second use mode is applicable for children of an older age group (e.g., four to twelve years old), and the booster 3 in this mode may be used in the forward-facing mode. By arranging the detachablebooster 3, the child safety seat 100 has multiple usage modes to meet the usage needs of children of different age groups, thereby improving the utilization rate of the child safety seat 100.

[0097] Continuing to refer to FIGS. 1 to 4, in an embodiment, the child safety seat 100 further includes a base 9 and an inclination adjusting device 5. In this embodiment, the backrest assembly 2 is slidably disposed on the base 9. The backrest assembly 2 includes a backrest body 21. An angle 9 of the backrest body 21 relative to the base 9 may be adjusted by adjusting the inclination adjusting device 5. As shown in FIGS. 2 and 22, the inclination angle 9 may be an angle formed between a plane where the backrest body 21 is located and a plane where a contact surface between the base 9 and the car seat is located. In some other embodiments, the base 9 may be omitted in the child safety seat 100, and the inclination adjusting device 5 may be omitted in the child safety seat 100, which is not limited herein.

[0098] As shown in FIG. 5, in an embodiment, the backrest assembly 2 further includes a mating rib 22 and a cross bar 23. An end of the mating rib 22 is connected to the backrest body 21, and another end of the mating rib 22 is connected to the cross bar 23. A lower end surface 221 of the mating rib 22 is arc-shaped, and the base 9 is provided with a connecting groove 99. The lower end surface 221 of the mating rib 22 is at least partially received in the connecting groove 99 and is movable along the connecting groove 99. As the mating rib 22 slides along the connecting groove 99, the inclination angle of the backrest body 21 relative to the base 9 changes. The connecting groove 99 extends in a direction substantially parallel to a first direction DI (i.e., a front-back direction), and the mating rib 22 extends in the direction substantially parallel to the first direction DI. In this embodiment, the backrest assembly 2 is provided with two mating ribs 22. The two mating ribs 22 are substantially parallel to each other. Two ends of the cross bar 23 are respectively connected to the two mating ribs 22. The two mating ribs 22 are connected to the cross bar 23 to form a substantially U-shaped structure. The cross bar 23 is detachably connected to the mating ribs 22, for example, by a threaded connection.

[0099] As shown in FIGS. 5 and 7, in an embodiment, the inclination adjusting device 5 is connected between the base 9 and the mating rib 22. The inclination adjusting device 5 has a locked state and an unlocked state. When the inclination adjusting device 5 is in the unlockedstate, the mating rib 22 of the backrest assembly 2 may move along the connecting groove 99 of the base 9 to adjust the inclination angle of the backrest body 21 relative to the base 9. When the inclination adjusting device 5 is in the locked state, the mating rib 22 is prevented from moving along the connecting groove 99 to lock the inclination angle of the backrest body 21 relative to the base 9. The specific configuration of the inclination adjusting device 5 will not be described in detail in this embodiment.

[0100] FIG. 19 is a perspective view of a child safety seat 100 according to another embodiment of the present application.

[0101] As shown in FIGS. 19 to 22, the child safety seat 100 includes the seat assembly 10, the base 9 and the inclination adjusting device 5. The seat assembly 10 includes the backrest assembly 2 and the seat body 1. The backrest assembly 2 includes the backrest body 21, the mating rib 22 and the cross bar 23. The backrest assembly 2 is slidably disposed on the base 9 through the mating rib 22. The angle 9 of the seat assembly 10 relative to the base 9 may be adjusted by adjusting the inclination adjusting device 5. The inclination adjusting device 5 in this embodiment will be described in detail hereinafter. In this embodiment, the seat body 1 is detachably connected to the backrest assembly 2, and the seat body 1 may be, for example, a booster 3 according to an embodiment of the present application.

[0102] In an alternative embodiment, the seat body 1 and the backrest assembly 2 are integrally formed. The exemplary seat assembly 10 may be an infant carrier. The seat body 1 and the backrest assembly 2 are integrally formed of polyethylene material. Two connecting engagement rods are disposed at the lower part of the infant carrier. The infant carrier is detachably connected to the base 9 through the connecting engagement rods and may slide forward and backward relative to the base 9. In another alternative embodiment, the seat body 1 is slidably connected to the base 9, and when the seat body 1 slides relative to the base 9, the angle, formed between the plane where the seat body 1 is located and the plane where the contact surface between the base 9 and the car seat is located, changes as the position of the seat body 1 is changed.

[0103] As shown in FIGS. 24 to 26, in another embodiment, the backrest assembly 2 has two mating ribs 22 extending roughly in the front-back direction. The two mating ribs 22 are roughly parallel to each other. Each mating rib 22 is connected to the backrest body 21 andextends in the front-back direction in a direction away from the backrest body 21. Each mating rib 22 may be slidably connected to the base 9 in the front-back direction to drive the backrest assembly 2 to move relative to the base 9, thereby changing the inclination angle 9 between the backrest body 21 of the backrest assembly 2 and the base 9. The two mating ribs 22 may slide relative to the base 9 and be stably supported on the base 9. The cross bar 23 is connected to ends of the two mating ribs 22 away from the backrest body 21. In this embodiment, the cross bar 23 is integrally formed. In some other embodiments, the cross bar 23 includes two discontinuous rods, which are connected to the two mating ribs 22 respectively, and the two rod bods are disposed end to end with a gap formed therebetween.

[0104] For ease of description, the following description is made by taking the mating rib 22 on the left side as an example. It should be noted that the mating rib 22 on the left side refers to the mating rib 22 located proximate to the left hand side of the child when the child is sitting on the child safety seat 100 that is installed on the car seat in the forward-facing mode.

[0105] As shown in FIGS. 24 and 26, in another embodiment, the mating rib 22 includes a rib body 226, and a rib housing 227 at least partially covering the rib body 226. The rib housing 227 is detachably connected to the rib body 226. The rib body 22 has an arc-shaped lower end surface 221. An end of the rib body 226 is connected to the backrest body 21, and another end of the rib body 226 extends forward.

[0106] The base 9 is provided with a mating member 98 that is slidably mated with the mating rib 22. One of the mating rib 22 and the mating member 98 is provided with a mating recess 225, and another of the mating rib 22 and the mating member 98 is provided with a mating protrusion 981. The mating recess 225 is arc-shaped and extends in the front-back direction. The mating protrusion 981 is slidably connected to the mating recess 225. Through the slidable connection between the mating protrusion 981 and the mating recess 225, the seat assembly 10 is movably connected to the base 9. When the seat assembly 10 slides relative to the base 9 in the front-back direction, the angle 9 between the backrest assembly 2 and the base 9 is adjusted accordingly. Referring to FIGS. 25 and 26, in this embodiment, the mating rib 22 is provided with the mating recess 225, and the mating member 98 is provided with the mating protrusion 981. The mating member 98 includes a rear mating member 98a and a front mating member 98b. The mating recess 225 includes: a rear mating recess 225a that is inserted intoand mated with the mating protrusion 981 of the rear mating member 98a; and a front mating recess 225b that is inserted into and mated with the mating protrusion 981 of the front mating member 98b. An opening of the rear mating recess 225a faces inward, i.e., toward another of the two mating ribs 22, and an opening of the front mating recess 225b faces outward, i.e., toward a direction away from the other of the two mating ribs 22. The rear mating recess 225a and the front mating recess 225b are both arc-shaped. The center of the rear mating recess 225a coincides with the center of the front mating recess 225, so that the seat assembly 10 may pivot around the same pivot point or the same pivot shaft while moving on the base 9, such that the angle of the backrest assembly 2 relative to the base 9 may be adjusted more conveniently and reliably, and the slide is smooth.

[0107] As shown in FIGS. 25 and 26, in another embodiment, the rib body 226 is roughly L- shaped or J- shaped, and the rib body 226 has, for example, a structure of a hollow square tube. The rib body 226 includes a first rib segment 2261 and a second rib segment 2262. An extending direction of the second rib segment 2262 is the same as an extending direction of the backrest body 21. The second rib segment 2262 extends roughly in the up-down direction and is connected to the backrest body 21. The first rib segment 2261 extends roughly in the front- back direction. The rib housing 227 includes an inner housing 227b and an outer housing 227a that are fastened to each other. The first rib segment 2261 of the rib body 226 is received between the inner housing 227b and the outer housing 227a. At least a portion of the inner housing 227b is located between the rib bodies 226 of the two mating ribs 22, and at least a portion of the outer housing 227a is located on a side of the rib body 226 away from the inner housing 227b. In this embodiment, the inner housing 227b is detachably connected to the outer housing 227a. The inner housing 227b and the outer housing 227a are both provided with an abutting part 223. In other embodiments, the abutting part 223 may be disposed only on one of the inner housing 227b and the outer housing 227a.

[0108] Continuing to refer to FIGS. 25 and 26, the rib housing 227 is provided with the rear mating recess 225a and the front mating recess 225b. The front mating recess 225b and the rear mating recess 225a are both located below the rib body 226, that is, the front mating recess 225b and the rear mating recess 225a each are located between the rib body 226 and the base 9. As shown in FIG. 25, the front mating recess 225b is disposed on the inner housing227b, and the opening of the front mating recess 225b faces the outer housing 227b. As shown in FIG. 26, the rear mating recess 225a is disposed on the outer housing 227a, and the opening of the rear mating recess 225a faces the inner housing 227b. In another alternative embodiment, the front mating recess 225b may be disposed on the outer housing 227a, and the rear mating recess 225a may be disposed on the inner housing 227b, which is not limited herein.

[0109] As shown in FIGS. 24 and 25, in some embodiments, the backrest body 21 is provided with a storage space 213. The storage space 213 may be closed or opened. The storage space 213 may be used to receive items, for example, receive a five-way buckle set. When the buckle set on the child safety seat 100 is not required to be used by the user, the buckle set, together with a portion of a webbing connected to the buckle, may be placed in the storage space 213, and another portion of the webbing may be exposed outside the storage space 213. As such, there is no need to remove the buckle set and the webbing together.

[0110] As shown in FIGS. 1 to 3 and 7, in an embodiment, the child safety seat 100 is further provided with a seat belt 4 for securing the child on the child safety seat 100. The seat belt 4 is, for example, a five -point safety belt. The seat belt 4 includes a crotch strap 41, a shoulder strap 43, an adjusting strap 42, a first connecting buckle 44, and a second connecting buckle 45 configured to be engaged with the first connecting buckle 44. The first connecting buckle 44 is, for example, a male buckle, and the second connecting buckle 45 is, for example, a female buckle. The first connecting buckle 44 is sleeved on the shoulder strap 43 and may slide along the shoulder strap 43. The first connecting buckle 44 divides the shoulder strap 43 into a waist strap section 434 and a shoulder strap section 433. By adjusting the position of the first connecting buckle 44 on the shoulder strap 43, the length of the shoulder strap section 433 and the length of the waist strap section 434 may be adjusted without changing the effective length of the shoulder strap 43. The backrest body 21 is provided with a first connecting channel 211 through which the shoulder strap 43 may extend. The waist strap section 434 of the shoulder strap 43 is connected to the mating rib 22. The shoulder strap section 433 of the shoulder strap 43 is connected to the adjusting strap 42 through the first connecting channel 211. The backrest body 21 is further provided with a second connecting channel 212 through which the adjusting strap 42 may extend. An end of the adjusting strap 42 is connected to the shoulder strap section 433, and another end of the adjusting strap 42 extends through the secondconnecting channel 212 and extends toward the front of the child safety seat 100. In this way, the effective length of the shoulder strap 43 may be conveniently adjusted by operating the adjusting strap 42. It should be noted that the effective length of the shoulder strap 43 refers to the length of the shoulder strap 43 from the mating rib 22 to the first connecting channel 211, that is, the sum of the effective length of the shoulder strap section 433 and the effective length of the waist strap section 434.

[0111] Referring to FIGS. 1, 3 and 7, two shoulder straps 43 are provided. Each shoulder strap 43 is provided with one first connecting buckle 44. The waist strap section 434 of each shoulder strap 43 is connected to a corresponding mating rib 22. The shoulder strap sections 433 of the two shoulder straps 43 are connected to the same adjusting strap 42. The crotch strap 41 is connected to a booster body 31. The second connecting buckle 45 is disposed on the crotch strap 41. By connecting the two first connecting buckles 44 to the second connecting buckle 45 respectively, the child may be limited in the child safety seat.

[0112] FIGS. 6 to 7 are sectional views of the child safety seat 100 taken along lines Ul- U1 and U2-U2 respectively according to embodiments of the present application. FIG. 8 is a sectional view of the child safety seat 100 taken along a line U3-U3 according to an embodiment of the present application, with a connecting mechanism 32 in a locked state. FIG. 9 is a sectional view of the child safety seat 100 taken along the line U3-U3 according to an embodiment of the present application, with a connecting mechanism 32 in an unlocked state. FIGS. 10 to 12 are perspective views of the booster 3 according to an embodiment of the present application. The booster 3 may be used alone.

[0113] As shown in FIG. 10, in an embodiment, the booster 3 includes a booster body 31 and two armrest parts 34 respectively disposed on two sides of the booster body 31. A first hole 36 is formed between each of the two armrest parts 34 and the corresponding booster body 31. The car safety belt may extend through the first holes 36, to allow the car safety belt to secure the booster 3 on the car seat. In this way, when the booster 3 is used in the second use mode, that is, when the booster 3 is used alone, the booster 3 may be secured to the car seat by the car safety belt (not shown), and the child may be limited on the booster 3. When the booster 3 is used in the first use mode (refer to FIGS. 1 to 4), the child safety seat 100 may also be secured to the car seat by the car safety belt.

[0114] As shown in FIGS. 10 and 11, the booster body 31 is fixedly connected to the two armrest parts 34. The two armrest parts 34 have inner side surfaces 341 facing each other and outer side surfaces 342 facing away from each other. The booster body 31 has an upper surface 31a and a lower surface 31b. The upper surface 31a is configured for seating a child. The lower surface 31b is configured to be placed on the car seat, and is configured to be placed on the base 9 and connected to the mating ribs 22 of the backrest assembly 2. The booster 3 includes a first booster housing 301 and a second booster housing 302. The first booster housing 301 and the second booster housing 302 enclose a receiving cavity 303 (see FIG. 17). The first booster housing 301 forms the upper surface 31a of the booster body 31 and the inner sides 341 of the two armrest parts 34. The second booster housing 302 forms the lower surface 31b of the booster body 31 and the outer sides 342 of the two armrest parts 34. The first booster housing 301 is integrally formed.

[0115] As shown in FIGS. 17-18, and 27-28, in some embodiments, the upper surface 31a of the booster body 31 is provided with a storage recess 314, which is configured to receive items (such as upper pull straps), and an openable cover 33 rotatably disposed at the opening of the storage recess 314. The cover 33 has an opened state (refer to FIGS. 17 and 28) and a closed state (refer to FIGS. 18 and 27). An openable mechanism 39 is disposed on the cover 33. The booster body 31 has a coupling portion and a jointing portion. The cover 33 is pivotally connected to the coupling portion and may be locked to the jointing portion by the openable mechanism 39, thereby locking the cover 33 in the closed state.

[0116] As shown in FIGS. 17 and 18, in an embodiment, a side of the cover 33 is a first side 331 and is pivotally connected to the coupling portion. Specifically, the cover 33 is pivotally connected to a sidewall of the storage recess 314, that is, the sidewall of the storage recess 314 adjacent to the first side 331 forms the coupling portion. A side of the cover 33 opposite to the first side 331 is referred to as a second side 332. The second side 332 is provided with an engaging part 333. The engaging part 333 may be engaged with the jointing portion. The engaging part 333 is formed as the openable mechanism 39. Referring to FIGS. 17 and 18, the engaging part 333 includes an elastic arm part 3331 and elastic protrusions 3332 disposed on the elastic arm part 3331. The elastic arm part 3331 has an operatable end 3333 that may be operated. In this embodiment, the elastic arm part 3331 is generally U-shaped or V-shaped. Thejointing portion of the booster body 31 is provided with engaging holes 315. The elastic protrusion 3332 may be engaged with the engaging hole 315. The engaging holes 315 are disposed on the bottom wall of the storage recess 314, that is, the bottom wall of the storage recess 314 forms the jointing portion. The elastic protrusion 3332 may extend through the engaging hole 315 and then is engaged with the engaging hole 315. In some other unillustrated embodiments, the engaging hole 315 may also be disposed on the sidewall of the storage recess 314, that is, the sidewall of the storage recess 314 adjacent to the second side 332 forms the jointing portion.

[0117] As shown in FIGS. 17 and 18, the upper surface 31a of the booster body 31 is further provided with an operating recess 316. The operating recess 316 is in communication with the storage recess 314. When the elastic protrusion 3332 of the engaging part 333 is engaged with the engaging hole 315, the engaging part 333 is at least partially received in the operating recess 316, so that the operatable end 3333 may be pushed by the operating recess 316, to cause the elastic protrusion 3332 to be disengaged from the engaging hole 315. In some unillustrated embodiments, the engaging hole 315 may be disposed on the bottom wall of the operating recess 316, which is not limited herein.

[0118] FIGS. 31 to 32 are perspective views of a booster 3 according to another embodiment of the present application, with the cover 33 in FIG. 31 in the closed state, and with the cover 33 in FIG. 32 in the opened state.

[0119] As shown in FIGS. 31 to 33, in another embodiment, the cover 33 is provided with an accommodating recess 33c. The accommodating recess 33c may be a groove, a cavity, etc., disposed on the cover 33. The cover 33 includes an upper cover 33a and a lower cover 33b. The upper cover 33a and the lower cover 33b collectively enclose a receiving cavity, which is formed as the accommodating recess 33c. At least a portion of the openable mechanism 39 is movably arranged in the accommodating recess 33c. The booster body 31 is provided with a rotating shaft 3104. The rotating shaft 3104 is connected between the opposite sidewalls of the storage recess 314. The cover 33 is pivotally connected to the rotating shaft 3104, and specifically, the lower cover 33b of the cover 33 is pivotally connected to the rotating shaft 3104. The rotating shaft 3104 is formed as the coupling portion of the booster body 31. The jointing portion is a jointing recess 3102 that is recessed downward from the upper surface 31aof the booster body 31. The jointing recess 3102 is in communication with the storage recess 314, and a step portion is formed at a place where the jointing recess 3102 and the storage recess 314 are joined together. The bottom wall of the jointing recess 3102 is higher than the bottom wall of the storage recess 314, and the jointing recess 3102 is located in front of the storage recess 314. The cover 33 includes a first cover part 33d covering the storage recess 314 and a second cover part 33e covering the jointing portion. A side of the first cover part 33d away from the second cover part 33e forms the first side 331 of the cover 33. The first side 331 is pivotally connected to the sidewall of the storage recess 314. The side of the second cover part 33e away from the first cover part 33d forms the second side 332 of the cover 33. The second side 332 may be locked to the jointing portion by the openable mechanism 39.

[0120] As shown in FIGS. 31 and 33, in another embodiment, the openable mechanism 39 includes an openable unlocking member 391. The openable unlocking member 391 is movably disposed on the cover 33 and has a first position and a second position. The openable unlocking member 391 has an engaging end 3911 and an operable unlocking member 3912. Referring to FIG. 33, when the openable unlocking member 391 is in the first position, the engaging end 3911 may be engaged with the engaging hole 315. Referring to FIG. 31, when the openable unlocking member 391 is in the second position, the engaging end 3911 is separated from the engaging hole 315. Specifically, the engaging hole 315 is disposed on the sidewall of the jointing recess 3102. More specifically, the engaging hole 315 is disposed on the sidewall of the jointing recess 3102 facing the first side 331 of the cover 33. The engaging end 3911 may at least partially extend out of the second side 332 of the cover 33 and be engaged with the engaging hole 315. The openable unlocking member 391 is movably disposed in the accommodating recess 33c. The upper cover 33a (i.e., the upper surface of the cover 33) is provided with an operating port 334 in communication with the accommodating recess 33c. When the openable unlocking member 391 is in the first position, the unlocking member 3912 directly faces the operating port 334, so that the unlocking member 3912 may be operated via the operating port 334 to allow the unlocking member 391 to move. When the openable unlocking member 391 is in the second position, the engaging end 3911 extends out of the accommodating recess 33c to be engaged with the engaging hole 315. The rotation direction of the unlocking member 322 when the unlocking member 322 is performing unlocking isopposite to the rotation direction of the cover 33 when the cover 33 is being opened. As shown in FIG. 31, when the unlocking member 322 rotates in the counterclockwise direction, the unlocking is performed, and when the cover 33 rotates in the clockwise direction, the cover is opened, thereby preventing the cover 33 from being opened by mistake when the unlocking member 322 performs the unlocking.

[0121] Referring to FIG. 32, the openable mechanism 39 further includes an openable reset member 392. The openable reset member 392 is disposed between the cover 33 and the openable unlocking member 391. The openable reset member 392 abuts against the openable unlocking member 391 to bias the openable unlocking member 391 to move toward the first position. The openable reset member 392 is, for example, a compression spring. Referring to FIG. 33, the upper cover 33a is provided with an abutting rib 335. The abutting rib 335 is located in the accommodating recess 33c. The openable reset member 392 is received in the accommodating recess 33c. An end of the openable reset member 392 abuts against the openable unlocking member 391, and another end of the openable reset member abuts against the abutting rib 335. Specifically, the openable unlocking member 391 is provided with a reset recess 3913. The reset recess 3913 is a groove with an opening facing the upper cover 33a. The abutting rib 335 extends into the reset recess 3913. The openable reset member 392 is received in the reset recess 3913 and abuts against the sidewall of the reset recess 3913. More specifically, the reset recess 3913 is disposed between the engaging end 3911 and the unlocking member 3912, and is located in front of the unlocking member 3912.

[0122] As shown in FIGS. 31 and 32, the booster 3 is provided with two openable mechanisms 39, but which is not limited thereto. The two openable mechanisms 39 are symmetrically disposed on the cover 33. The moving directions of the openable unlocking members 391 of the two openable mechanisms 39 are substantially parallel to each other. Specifically, the moving direction of each openable unlocking member 391 is substantially perpendicular to the second side 331 of the cover 33. That is, when the cover 33 is in the closed state, each openable unlocking member 391 may move substantially in the front-rear direction.

[0123] FIGS. 42 to 43 are perspective views of a booster 3 according to another embodiment of the present application. In FIG. 42, the cover 33 is in the closed state, and in FIG. 43, the cover 33 is in the opened state.

[0124] As shown in FIGS. 42 to 43, the cover 33 is disposed at the opening of the storage recess 314 in an openable or closable manner by means of an openable mechanism 39. A cross section of the cover 33 is approximately rectangular, but which is not limited thereto. The cover 33 has a left side and a right side disposed opposite to each other. The openable mechanism 39 in this embodiment differs from the openable mechanism 39 in the above embodiments shown in FIGS. 31 to 33 in at least following configurations.

[0125] As shown in FIG. 45, the openable mechanism 39 includes two openable unlocking members 391 and an openable reset member 392 disposed between the two openable unlocking members 391. The two openable unlocking members 391 are symmetrically distributed on the left and right sides of the cover 33. The two openable unlocking members 391 are movably disposed on the cover 33. When the two openable unlocking members 391 respectively move between the first position and the second position, the two openable unlocking members 391 move in opposite directions respectively. In some alternative embodiments, the openable mechanisms 39 are respectively disposed on the left and right sides of the cover 33, and each openable mechanism 39 includes the openable unlocking member 391 and the openable reset member 392 disposed between the openable unlocking member 391 and the cover 33.

[0126] For ease of description, referring to FIGS. 43 and 45, in this embodiment, the openable unlocking member 391 disposed on the left side of the cover 33 is taken as an example for illustration.

[0127] As shown in FIGS. 43 and 45, the moving direction of the openable unlocking member 391 is substantially perpendicular to the left side of the cover 33. That is, the moving direction of the openable unlocking member 391 is substantially parallel to the first side 331 of the cover 33. That is, the moving direction of the openable unlocking member 391 is substantially parallel to the left-right direction. Accordingly, the engaging hole 315 is disposed on the sidewall of the storage recess 314 or on the sidewall of the jointing recess 3102. The engaging end 3911 of the openable unlocking member 391 may at least partially extend out of the left side of the cover 33, so that the engaging end 3911 may be engaged with the engaging hole 315. Specifically, when the openable unlocking member 391 is in the first position, the engaging end 3911 extends out of the left side of the cover 33 and may be engaged with the engaging hole 315; when the openable unlocking member 391 is in the second position, theengaging end 3911 retracts into the cover 33, so that the engaging end 3911 is separated from the engaging hole 315.

[0128] As shown in FIG. 44, the openable unlocking member 391 includes an unlocking push knob 391a and an engaging pin 391b inserted through the unlocking push knob 391a. The engaging pin 391b is fixedly or detachably connected to the unlocking push knob 391a. A portion of the engaging pin 391b extending out of the unlocking push knob 391a is formed as the engaging end 3911. The openable unlocking member 391 is provided with an operating recess 3914. The operating recess 3914 is a groove with an opening facing upward and disposed on the unlocking push knob 391a. The sidewall of the operating recess 3914 away from the engaging end 3911 is formed as at least a portion of the unlocking member 3912. When the openable unlocking member 391 is in the first position, at least a portion of the operating recess 3914 faces the operating port 334 of the cover 33, and at least a portion of the operating recess 3914 is exposed through the operating port 334, so as to allow for extending into the groove 3912a via the operating port 334 and allow the operating recess 3914 to be pushed against, thereby pushing the openable unlocking member 391 to move toward the second position. When the openable unlocking member 391 is in the second position, at least a portion of the operating recess 3914 is exposed through the operating port 334. The openable unlocking member 391 is further provided with a limiting part 3915. The limiting part 3915 protrudes from the opening of the operating recess 3914 and may at least partially extend into the operating port 334. In this way, the sidewall of the operating port 334 may be used to block the limiting part 3915 to limit the movement of the openable unlocking member 391, thereby preventing the unlocking member 3912 from being moved to be offset from the operating port 334, and the openable unlocking member 391 may be operated by both the limiting part 3915 and the unlocking member 3912.

[0129] As shown in FIG. 45, the openable reset member 392 is, for example, a compression spring. The openable reset member 392 abuts against the two openable unlocking members 391 respectively, so that the two openable unlocking members 391 move toward the first position respectively. That is, when any of the openable unlocking members 391 is not operated, the openable unlocking member 391 that is not operated is kept in the first position under the action of the openable reset member 392. Specifically, each openable unlockingmember 391 is provided with the reset recess 3913. The reset recess 3913 is disposed at the unlocking push knob 391a and is located at a side of the operating recess 3914 away from the engaging end 3911. A boss 3916 is disposed in the reset recess 3913. The two ends of the openable reset member 392 are respectively received in the reset recesses 3913 of the two openable unlocking members 391, and are respectively sleeved on the respective bosses 3916. In this way, the openable reset member 392 may be prevented from being offset during an elastic energy storage process. In this embodiment, when the two openable unlocking members 391 move from the first position to the second position respectively, the two openable unlocking members 391 move in directions approaching each other. Specifically, the openable unlocking member 391 disposed on the left side of the cover 33 moves to the right, and the openable unlocking member 391 disposed on the right side of the cover 33 moves to the left. In other words, when the openable mechanism 39 is required to perform unlocking, the two openable unlocking members 391 are pushed or simultaneously pressed, in directions allowing them to approach each other, so that the two openable unlocking members 391 simultaneously move from the first position to the second position.

[0130] As shown in FIGS. 10, 12 and 34, the booster 3 further includes a cup holder 38. The cup holder 38 is detachably connected to at least one of the armrest parts 34. A cross section of the cup holder 38 is approximately circular, so as to facilitate the placement of objects such as water cups, and reduce the interference of the cup holder 38 with the adjacent objects or passengers. At least one armrest part 34 is provided with a holder recess 343 configured to be engaged with the cup holder 38. In this embodiment, the outer side surfaces 342 of the two armrest parts 34 each are provided with the holder recess 343, and one cup holder 38 may be provided. As such, the user may choose to engage the cup holder 38 with one of the holder recesses 343 as needed. In another embodiment, referring to FIG. 1, two cup holders 38 are provided, and the two cup holders 38 are respectively engaged with the two holder recesses 343. It should be understood that in another embodiment, more than two cup holders 38 may be provided, and more than two holder recesses 343 may be provided, which is not limited herein.

[0131] For ease of description, one of the armrest parts 34 and the cup holder 38 disposed thereon are taken as an example for illustration below.

[0132] As shown in FIG. 34, the armrest part 34 includes a first armrest part 34a located in front of the first hole 36 and a second armrest part 34b located in the rear of the first hole 36. The holder recess 343 is disposed on the first armrest part 34a. The cup holder 38 is provided with a connecting protrusion 381. The holder recess 343 is provided with an entrance groove 344 in communication with the limiting hole 345. The connecting protrusion 381 enters into the limiting hole 345 through the entrance groove 344 and is locked, to fix the cup holder 38 at the holder recess 343. The cup holder 38 includes a storage cup 383. The connecting protrusion 381 is disposed on a sidewall of the storage cup 383. Specifically, the connecting protrusion 381 includes a connecting part 3811 and a locking part 3812. The connecting part3811 is connected between the locking part 3812 and the sidewall of the storage cup 383. The locking part 3812 is connected to the connecting part 3811 and extends in a direction parallel to the sidewall of the storage cup 383 at a distance from the connecting part 3811. The holder recess 343 has a sidewall 3431 and a bottom wall 3432. The entrance groove 344 and the limiting hole 345 each extend through the side wall 3431. The locking part 3812 of the connecting protrusion 381 extends through the entrance groove 3411, so that the locking part3812 may extend from the inner sidewall 3431a of the holder recess 343 to the outer sidewall (not shown) of the holder recess 343. The connecting part 3811 of the connecting protrusion 381 enters into the limiting hole 345 along the groove 3411, so that the locking part 3812 abuts against the outer sidewall of the holder recess 343 at the limiting hole 345, thereby locking the connecting protrusion 381 at the limiting hole 345.

[0133] Continuing to refer to FIG. 34, the entrance groove 344 is approximately L-shaped. The entrance groove 344 includes a first groove section 3441 and a second groove section 3442 that are in communication with each other. The second groove section 3442 is located between the first groove section 3441 and the limiting hole 345. The first groove section 3441 extends in a direction approximately perpendicular to the bottom wall 3432. The second groove section 3442 extends in a direction approximately parallel to the bottom wall 3432, that is, extends in a direction approximately parallel to the circumference of the holder recess 343. The distance between the opposite sidewalls of the first groove section 3441 is greater than the distance between the opposite sidewalls of the second groove section 3442. The connecting protrusion 381 may freely extend through the first groove section 3441, that is, the locking part 3812 ofthe connecting protrusion 381 may freely extend into or withdraw from the first groove section 3441, while the locking part 3812 of the connecting protrusion 381 cannot freely extend into or withdraw from the second groove section 3442, and the connecting protrusion 381 may slide relative to the second groove section 3442 along the extending direction of the second groove section 3442.

[0134] As shown in FIG. 34, a limiting protrusion 349 is disposed at the transition portion between the second groove section 3442 of the entrance groove 344 and the limiting hole 345. The limiting protrusion 349 protrudes from the sidewall of the second groove section 3442, and is configured to limit the connecting part 3811 of the connecting protrusion 381 in the limiting hole 345, thereby preventing the connecting protrusion 381 from accidentally separating from the limiting hole 345. The connecting part 3811 of the connecting protrusion 381 may push against the limiting protrusion 349 to deform it, so that the connecting protrusion 381 may slide to the limiting hole 345 or slide out of the limiting hole 345. Specifically, two limiting protrusions 349 are provided. The two limiting protrusions 349 are axially symmetrically disposed at the transition portion between the second groove section 3442 of the entrance groove 344 and the limiting hole 345. The holder recess 343 is provided with a deformation hole 347. The number of the deformation holes 347 is the same as the number of the limiting protrusions 349. In this embodiment, two deformation holes 347 are provided. The two deformation holes 347 are axially symmetrically disposed on two sides of the limiting hole 345, and are located on the respective two sides of the two limiting protrusions 349. Specifically, the two deformation holes 347 are arranged proximate to the upper and lower sides of the limiting hole 345, respectively, and are axially symmetrically disposed with respect to the limiting hole 345. The configuration of the deformation holes 347 may cause the limiting protrusion 349 and the portion adjacent thereto to deform while the connecting part 3811 of the connecting protrusion 381 is pushing against the limiting protrusion 349, so that the connecting protrusion 381 passes over the limiting protrusion 349, and then the connecting protrusion 381 may be easily engaged with or withdrawn from the limiting hole 345.

[0135] In order to enable the cup holder 38 to be more firmly connected to the holder recess 343, the cup holder 38 is further provided with a connecting column 382. The connecting column 382 is disposed on the bottom wall of the storage cup 383. The holder recess 343 isprovided with a first connecting hole 346. The connecting column 382 is inserted into and engaged with the first connecting hole 346.

[0136] In the above embodiment, the process of installing the cup holder 38 to the holder recess 343 includes steps as follows. Firstly, the connecting column 382 is aligned with the first connecting hole 346, and the connecting protrusion 381 extends through the first groove section 3441 of the entrance groove 344. Then, the cup holder 38 is moved downward along the first groove section 3441 to cause the connecting protrusion 381 to slide to the transition portion between the first groove section 3441 and the second groove section 3442, during which the connecting column 382 is inserted into the first connecting hole 346. Then, the cup holder 38 is rotated clockwise to cause the connecting protrusion 381 to slide toward the limiting hole 345 along the second groove section 3442 of the entrance groove 344. The storage cup holder 38 is still rotated clockwise, the connecting part 3811 of the connecting protrusion 381 pushes against the limiting protrusion 349 and passes over the limiting protrusion 349, to cause the connecting protrusion 381 to slide to the limiting hole 345, so that the connecting protrusion 381 is locked with the limiting hole 345.

[0137] The process of removing the cup holder 38 from the holder recess 343 is opposite to the process of installing the cup holder 38 to the holder recess 343, and specifically includes steps as follows. Firstly, the cup holder 38 is rotated counterclockwise, and the connecting part 3811 of the connecting protrusion 381 pushes against the limiting protrusion 349 and passes over the limiting protrusion 349, to cause the connecting protrusion 381 to slide from the limiting hole 345 to the second groove section 3442 of the entrance groove 344. The cup holder 388 is still rotated clockwise to cause the connecting protrusion 381 to slide toward the first groove section 3441 along the second groove section 3442 of the entrance groove 344. When the connecting protrusion 381 slides to the transition portion between the first groove section 3441 and the second groove section 3442, the cup holder 38 is moved upward to cause the connecting protrusion 381 to slide along the first groove section 3441, and during this process, the connection column 382 withdraws from the first connection hole 346. Finally, the connecting protrusion 381 is withdrawn from the first groove section 3441 of the entrance groove 344.

[0138] As shown in FIGS. 27 and 28, in an embodiment, in order to facilitate the securingof the booster 3, the booster 3 is further provided with a connecting strap assembly 7. The connecting strap assembly 7 includes a webbing and a connector 73 disposed on the webbing. The webbing includes a first webbing 71 and a second webbing 72. Two ends of the first webbing 71 each are provided with a connector 73. A first end of the second webbing 72 is connected to the middle portion of the first webbing 71, and a second end of the second webbing 72 is connected to the booster body 31. The booster 3 is provided with two armrest parts 34. Each armrest part 34 has a second hole 348. Two connectors 73 are configured to extend through two second holes 348 respectively. In this embodiment, each the second hole 348 is disposed on the first armrest part 34a. The booster 3 may be secured on the car seat by using the connecting strap assembly 7. The second end of the second webbing 72 away from the first webbing 71 is connected to the bottom wall of the storage recess 314, or extends through the bottom wall of the storage recess 314 and is connected to other components disposed on the booster body 31. When the connecting strap assembly 7 is not in use, the connecting strap assembly 7 may be stored in the storage recess 314, that is, the second webbing 7 and the connectors 73 may be received in the storage recess 314. When the connecting assembly 7 is in use, the two connectors 73 respectively disposed on the first webbing 71 extend through the respective second holes 348 of the armrest parts 34, and are locked with the car seat connector disposed on the car seat. In addition, the second webbing 72 and a portion of the first webbing 71 are clamped in the storage recess 314 by closing the cover 33, so that the first webbing 72 is prevented from being higher than the upper surface of the booster 3 and from causing discomfort to the child’s hip when tightened.

[0139] As shown in FIGS. 10 to 11, in an embodiment, the booster body 31 includes a front end 31c and a rear end 3 Id. In an embodiment, the front end 31c refers to the front half portion of the booster body 31 in the front-back direction (i.e., the first direction DI), and the rear end 3 Id refers to the rear half portion of the booster body 31 in the front-back direction. The center line of the booster body 31 in the left-right direction (i.e., the second direction D2) forms a dividing line between the front end 31c and the rear end 3 Id. Exemplarily, referring to FIG. 2, the portion of the booster body 31 located on the left side of the section line Ul-Ul is the front end 31c, and the portion located on the right side of the section line Ul-Ul is the rear end 31d. Continuing to refer to FIGS. 10 and 11, the booster body 31 is provided with a matinggroove 311. The mating groove 311 is located on the lower surface 3 lb of the booster body 31. The mating groove 311 is configured to be engaged with at least a portion of the backrest assembly 2. Specifically, the mating groove 311 is roughly U-shaped. The mating groove 311 includes two first grooves 3111 and a second groove 3112 in communication with the two first grooves 3111. The two first grooves 3111 are substantially parallel to each other. Each first groove 3111 extends from the rear end 3 Id to the front end 31c, that is, extends forward in the first direction D 1. The two first grooves 3111 are configured to be engaged with the two mating ribs 22 respectively to limit the movement of the booster 3 relative to the mating ribs 22 in a direction perpendicular to the first direction DI. Two ends of the second groove 3112 are in communication with the first groove 3111. Referring to FIG. 9, the second groove 3112 is configured to at least partially accommodate the cross bar 23, and the sidewall of the second groove 3112 adjacent to the backrest body 21 may abut against the cross bar 32, thereby limiting the movement of the booster 3 relative to the cross bar 23 in the first direction DI, that is, limiting the forward movement of the booster 3 relative to the cross bar 23. In other unillustrated embodiments, the mating groove 311 may be provided with only the first groove 3111. The first groove 3111 is engaged with the mating rib 22, which is not limited herein.

[0140] In an embodiment, as shown in FIGS. 8, 9 and 12, the booster 3 is provided with a connecting mechanism 32. The connecting mechanism 32 is connected to the booster body 31. The booster 3 is connected to the backrest assembly 2 by the connecting mechanism 32. The connecting mechanism 32 is disposed proximate to the front end 31c of the booster body 31. The connecting mechanism 32 includes a locking member 321, an unlocking member 322 and an elastic member 323. The locking member 321 is pivotally connected to the booster body 31 and has a hook part 3211. The locking member 321 may pivot between an unlocked position and a locked position. When the locking member 321 is in the locked position, the locking member 321 is engaged with the backrest assembly 2 to allow the booster 3 to be connected to the backrest assembly 2. When the locking member 321 is in the locked position, the locking member 321 is disengaged from the backrest assembly 2 to allow the booster 3 to be separated from the backrest assembly 2. Specifically, referring to FIG. 8, when the locking member 321 is in the locked position, the hook part 3211 of the locking member 321 is inserted into the second groove 3112 to be engaged with the cross bar 23. Referring to FIG. 9, when the lockingmember 321 is in the unlocked position, the hook part 3211 is configured to be disengaged from the cross bar 23, that is, the hook part 3211 is disengaged from the cross bar 23 and separated from the second groove 3112.

[0141] In other unillustrated embodiments, the locking member 321 may also slide relative to the booster body 31 in the first direction DI, in the second direction D2 or in the third direction D3. In these embodiments, the end of the locking member 321 is connected to the end of the unlocking member 322 by a driving component such as a steel wire or an inclined surface. When the locking member 321 slides relative to the booster body 31, the locking member 321 drives the driving component to move, and the driving component pulls or pushes against the end of the locking member 322, so that the locking member 322 rotates toward the unlocked position.

[0142] Referring to FIGS. 8 and 9, in an embodiment, the locking member 321 is substantially C-shaped. The locking member 321 is provided with a pivoting part 3214 and a driving part 3213 connected to the pivoting part 3214. The booster body 31 is provided with a channel 313. The channel 313 extends through the first booster housing 301 and the second booster housing 302. The locking member 321 is configured to extend through the channel 313. The pivoting part 3214 and the driving part 3213 may extend out of an end of the channel 313. The pivoting part 3214 is pivotally connected to the booster body 31 and connected to the unlocking member 322. The unlocking member 322 is pivotally connected to the booster body 31. When the unlocking member 322 pivots, the locking member 321 may be driven to pivot by the driving part 3213. The hook part 3211 may at least partially extend out of the channel 313. Specifically, the hook part 3211 may extend out of another end of the channel 313 and be inserted into the second groove 3112 to be engaged with the cross bar 23. The cross bar 23 has an upper side surface 231, a lower side surface 232, a rear side surface 233 facing the backrest body 21, and a front side surface 234 facing away from the backrest body 21. The locking member 321 is engaged with the cross bar 23 in a direction from the rear side surface 233 of the cross bar 23 to the front side surface 234, that is, in the counterclockwise direction. The sidewall of the channel 313 forms a first limiting part 3132 and a second limiting part 3131, thereby limiting the pivoting angle of the locking member 321. In this embodiment, the sidewall of the second groove 3112 of the mating groove 311, that is, the sidewall of the secondgroove 3112 adjacent to the backrest body 21, is formed as the first limiting part 3132. When the locking member 321 is in the locked position, the first limiting part 3132 abuts against the locking member 321, and the hook part 3211 may extend out of the channel 313 and is inserted into the second groove 3112 to be engaged with the lower side surface 232 of the cross bar 23. In this way, the booster 3 may neither move forward in the front-back direction (i.e., the first direction) nor move upward in the up-down direction (i.e., the third direction D3) relative to the cross bar 23 (or the backrest assembly 2). When the locking member 321 is in the unlocked position, the locking member 321 abuts against the second limiting part 3131. By providing the first limiting part 3132 and the second limiting part 3131, the pivoting angle of the locking member 321 may be limited between the locked position and the unlocked position, thereby preventing the locking member 321 from pivoting excessively.

[0143] As shown in FIGS. 8 and 9, the hook part 3211 of the locking member 321 is provided with a wedge-shaped surface 3212. The wedge-shaped surface 3212 is disposed at an end of the hook part 3211. The wedge-shaped surface 3212 is configured to be pushed against by the cross bar 23 to cause the locking member 321 to pivot, thereby allowing the hook part 3211 to be engaged with the cross bar 23. The upper side surface 231 of the cross bar 23 is an arc- shaped surface or an inclined surface, so as to more stably push against the wedge-shaped surface 3212. The lower side surface 232 of the cross bar 23 is substantially a flat surface, and the lower side surface 232 is slightly inclined in a direction from the front side surface 234 to the rear side surface 233, so that the lower side surface 232 may be engaged with the hook part 3211 more stably.

[0144] In an embodiment, as shown in FIGS. 8, 9 and 12, the unlocking member 322 has a pivoting recess 3221. Specifically, the unlocking member 322 includes a top part 3222 and two opposite side parts 3223. The two side parts 3223 are connected to the two sides of the top part 3222 respectively and are substantially parallel to each other. The top part 3222 and the two side parts 3223 enclose the pivoting recess 3221. The unlocking member 322 is substantially U-shaped. The pivoting recess 3221 is formed at the two ends of the unlocking member 322. A handle part 3224 is disposed between the two ends of the unlocking member 322. The upper surface 31a of the booster body 31 is provided with a receiving groove 312. The receiving groove 312 is formed by the first booster housing 301. The unlocking member322 is received in the receiving groove 312 and is pivotally connected to the sidewall of the receiving groove 312. Specifically, the two ends of the unlocking member 322 are pivotally connected to the sidewalls of the receiving groove 312 respectively. More specifically, the two side parts 3223 are pivotally connected to the sidewalls of the receiving groove 312 respectively via a pin shaft 324.

[0145] Continuing to refer to FIGS. 8, 9 and 12, the receiving groove 312 is in communication with the channel 313, so that the pivoting part 3214 of the locking member 321 may extend into the receiving groove 312 to be pivotally connected to the sidewalls of the receiving groove 312. The pivoting part 3214 is at least partially received in the pivoting recess 3221. The driving part 3213 may at least partially extend out of the pivoting recess 3221, so that the driving part 3213 may be pushed against by the unlocking member 322. The pivot axis of the locking member 321 pivoting relative to the booster body 31 and the pivot axis of the unlocking member 322 pivoting relative to the booster body 31 are colinear or parallel to each other. In this embodiment, the unlocking member 322 and the locking member 321 are pivotally connected to the booster body 31 by the same pin shaft 324, and the locking member 321 and the unlocking member 322 may be pivoted relative to the pin shaft 324. Specifically, the pin shaft 324 is configured to extend into the locking member 321 and the unlocking member 322, and two ends of the pin shaft 324 are fixedly connected to the two sidewalls of the receiving groove 312 respectively. More specifically, the pin shaft 324 extends through the two side parts 3223 of the unlocking member 322 and the locking member 321, then is connected to the sidewalls of the receiving groove 312. In another embodiment, the unlocking member 322 and the locking member 321 may be pivotally connected to the booster body 31 by a plurality of pin shafts 324. For example, each pivoting recess 3221 is pivotally connected to the two sidewalls of the receiving groove 312 by two pin shafts 324, and is connected to the locking member 321, which is not limited herein.

[0146] As shown in FIGS. 8 and 9, the unlocking member 322 may be pivoted between the first position and the second position to drive the locking member 321 to pivot between the locked position and the unlocked position. When the unlocking member 322 is in the second position, the angle between the unlocking member 322 and the booster body 31 is greater than the angle between the unlocking member 322 and the booster body 31 when the unlockingmember 322 is in the first position. In this embodiment, when the unlocking member 322 is in the first position, the locking member 321 is in the locked position, and the unlocking member 322 may be completely received in the receiving groove 312, that is, the unlocking member 322 does not protrude from the receiving groove 312. More specifically, when the unlocking member 322 is in the first position, the unlocking member 322 is just coplanar with the upper surface 3 la of the booster body 31. In this way, a relatively flat sitting surface may be provided to improve the comfort of the child sitting on the booster 3. When the unlocking member 322 pivots to the second position, the locking member 321 is in the unlocked position, and the handle part 3224 of the unlocking member 322 is separated from the receiving groove 312. In this way, the unlocking member 322 may be operated conveniently.

[0147] In another embodiment, the unlocking member 322 has a third position. The third position is located between the first position and the second position. When the unlocking member 322 pivots from the first position to the third position, the pivoting recess 3221 of the unlocking member 322 does not push against the driving part 3213 of the locking member 321 to pivot, that is, the distance from the first position to the third position forms the buffering travel of the unlocking member 322. In the buffering travel of the unlocking member 322, the locking member 321 remains in the locked position. By arrangement of the buffering travel, it is possible to prevent the unlocking member 322 from being disengaged from the cross bar 23 due to misoperation, thereby improving the safety of the connection between the booster 3 and the backrest assembly 2. When the unlocking member 322 is in the third position, the end of the pivoting recess 3221 of the unlocking member 322 exactly abuts against the driving part 3213 of the locking member 321, and the locking member 321 is in the locked position, and the end of the pivoting recess 3221 may push against the driving part 3213 to drive the locking member 321 to pivot. When the unlocking member 322 pivots from the third position to the second position, the end of the pivoting recess 3221 may push against the driving part 3213 to drive the lock member 321 to pivot from the locked position to the unlocked position. In this embodiment, when the unlocking member 322 is in the first position, the unlocking member 322 is substantially parallel to the upper surface 31a of the booster body 31, that is, the angle between the unlocking member 322 and the upper surface 31a is approximately 0°. When the unlocking member 322 is in the second position, the angle between the unlocking member 322and the upper surface 3 la is approximately 90°. When the unlocking member 322 is in the third position, the angle between the unlocking member 322 and the upper surface 31a is approximately 60°. The buffering travel of the unlocking member 322 allows for the angle between the unlocking member 322 and the upper surface 31a in a range of approximately 0° to 60°. In other embodiments, the angle between the unlocking member 322, when in the first position, the third position or the second position, and the upper surface 31a may also be set to other values, which is not limited herein.

[0148] As shown in FIGS. 8, 9 and 12, in this embodiment, one locking member 321 is provided. The locking member 321 is connected to the pivoting recess 3221 at one of the ends of the unlocking member 322. In other embodiments, two locking members 321 may be provided. The two locking members 321 are connected to the pivoting recesses 3221 at the two ends of the unlocking member 322 respectively by the pin shafts 324. In other embodiments, more than two locking members 321 may be provided according to the shape of the unlocking member 322 and actual needs, and these locking members 321 are pivotally connected to the respective unlocking members 322, which is not limited herein. The unlocking member 322 pushes against the driving part 3213 through the end of the top part 3222, to drive the locking member 321 to pivot in the same direction as the unlocking member 322 (for example, the rotation direction Rl, i.e., the clockwise direction).

[0149] As shown in FIGS. 31 and 32, in another embodiment, the connecting mechanism 32 includes an unlocking member 322, a locking member 321 and an elastic member 323. For the configuration of the locking member 321, reference may be made to the configuration of the locking member 321 in the above embodiment. For the configuration of the elastic member 323, reference may be made to a configuration of a third elastic member 323c in the embodiment as described below, which is not described in detail herein. The unlocking member 322 in this embodiment differs from the unlocking member 322 in the above embodiment shown in FIGS. 8 to 9 mainly in following configurations.

[0150] As shown in FIGS. 31 and 32, in another embodiment, the unlocking member 322 is detachably connected to the locking member 321 in a driven manner, that is, the unlocking member 322 is connected to the locking member 321 in a driven manner, and may be separated from the locking member 321. The unlocking member 322 is pivotally connected to the secondcover part 33e of the cover 33. Specifically, the upper surface 31a of the cover 33 is provided with the concave receiving groove 312. The receiving groove 312 is configured to receive the unlocking member 322. Two ends of the unlocking member 322 are respectively pivotally connected to the sidewalls of the receiving groove 312. The locking member 321 is pivotally connected to a rotating recess 3101 of the booster body 31. The rotating recess 3101 extends through the bottom wall of the jointing recess 3102. Referring to FIG. 28, the lower housing 33b of the cover 33 is provided with a through hole 3105. The through hole 3105 is in communication with the receiving groove 312. At least one of the unlocking member 322 and the locking member 321 may extend through the through hole 3105, so that the unlocking member 322 may drive the locking member 321 to rotate. The driving part 3213 of the locking member 321 at least partially extend through the rotating recess 3101 and extends into the jointing recess 3102. When the cover 33 is in a closed state, the receiving groove 312 is in communication with the jointing recess 3102 through the through hole 3105, so that when the unlocking member 322 rotates, the unlocking member 322 may push against the driving part 3213, thereby driving the locking member 321 to pivot.

[0151] FIGS. 13 and 14 are perspective views of an elastic member 323 according to an embodiment of the present application. FIG. 15 is a perspective view of an elastic member 323 according to another embodiment of the present application.

[0152] As shown in FIGS. 12 to 14, in an embodiment, the elastic member 323 includes a first elastic member 323a. The first elastic member 323a is, for example, a torsion spring. The elastic member 323a is sleeved on the pin shaft 324. The elastic member 323a includes a first end 3233 connected to the booster body 31, a second end 3234 connected to the unlocking member 322, and a third end 3235 connected to the locking member 321. Specifically, the first end 3233 is received in the receiving cavity 303 and abuts against the second booster housing 302 of the booster body 31. The second end 3234 is engaged with the unlocking member 322. The third end 3235 is engaged with the locking member 321. The second end 3234 biases the unlocking member 322 toward the first position, so that the unlocking member 322 pivots toward the first position. The third end 3235 biases the locking member 321 toward the locked position, so that the locking member 321 pivots toward the locked position. In this embodiment, the first elastic member 323a is integrally formed, so as to facilitate the installation of the firstelastic member 323a.

[0153] As shown in FIG. 15 and FIG. 16, in another embodiment, the elastic member 323 includes a second elastic member 323b and a third elastic member 323c. The second elastic member 323b and the third elastic member 323c are, for example, torsion springs. Referring to FIG. 12, the second elastic member 323b and the third elastic member 323c are both sleeved on the pin shaft 324. An end of the second elastic member 323b abuts against the booster body 31, and another end of the second elastic member 323b is engaged with the unlocking member 322. The second elastic member 323b biases the unlocking member 322 toward the first position, so that the unlocking member 322 pivots toward the first position. An end of the third elastic member 323c abuts against the booster body 31, and another end of the third elastic member 323c is engaged with the locking member 321. The third elastic member 323c biases the locking member 321 toward the locked position, so that the locking member 321 pivots toward the locked position. The elastic member 323 in this embodiment includes two independent torsion springs, which has a simple structure and a low cost.

[0154] In other unillustrated embodiments, the elastic member 323 may include only the third elastic member 323c that biases the locking member 321 toward the locked position. In this embodiment, the locking member 321 pivots from the unlocked position to the locked position, and then the unlocking member 322 may be driven to pivot from the second position to the third position. When the unlocking member 322 is in the third position, the unlocking member 322 pivots from the third position to the first position under its own gravity.

[0155] In another embodiment, the elastic member 323 may include only the second elastic member 323b that biases the locking member 321 toward the first position. The unlocking member 322 is provided with a bottom part (not shown) facing the top part 3222. The bottom part is connected between the two side parts 3223. At least a portion of the driving part 3213 of the locking member 321 may extend out of the pivoting recess 3221 from between the top part 3222 and the bottom part. When the unlocking member 322 pivots from the second position to the first position, the bottom part may push against the driving part 3213 to pivot the locking member 321 from the unlocked position to the locked position.

[0156] In an embodiment, as shown in FIGS. 5 and 7, the rear end 3 Id of the booster body 31 is provided with an engaging groove 319. The engaging groove 319 is in communicationwith the first groove 3111 of the mating groove 311. A wall (e.g., bottom wall) of the engaging groove 319 forms a first engaging inclined surface 3191. The first engaging inclined surface 3191 is disposed obliquely to the upper surface 31a of the booster body 31. The mating rib 22 is provided with the abutting part 223. The abutting part 223 is provided with a second engaging inclined surface 222 configured to be engaged with the first engaging inclined surface 3191. In the present embodiment, the abutting part 223 is disposed on the inner side of the mating rib 22. When the booster 3 is connected to the backrest assembly 2, the abutting part 223 is at least partially received in the engaging groove 319, and the first engaging inclined surface 3191 abuts against the second engaging inclined surface 222 to prevent the movements of the booster 3 relative to the backrest 2 in the first direction DI (i.e., the front-back direction) and in the third direction D3 (i.e., the vertical direction, also referred to as the up-down direction) respectively, thereby locking the booster 3 between the backrest body 21 and the base 9. The third direction D3 is substantially perpendicular to the first direction DI. As shown in FIG. 24, in another embodiment, the inner side and the outer side of the mating rib 22 each are provided with the abutting part 223. In another alternative embodiment, the abutting part 223 may be disposed on the backrest body 21. It can be understood that in other unillustrated embodiments, the rear end 3 Id of the booster body 31 may also be provided with the abutting part 223; the abutting part 223 is provided with the first engaging inclined surface 3191; the backrest body 21 is provided with the engaging groove 319; the engaging groove 319 is provided with the second engaging inclined surface 222 configured to be engaged with the first engaging inclined surface 3191, which in not limited herein.

[0157] In this embodiment, the front end 31c of the booster body 31 is engaged with the cross bar 23 of the backrest assembly 2 by the connecting mechanism 32. The rear end 3 Id of the booster body 31 prevents the movements of the booster 3 in the first direction DI and in the third direction D3 respectively through the cooperation between the first engaging inclined surface 3191 and the second engaging inclined surface 222. Through the engagement of the mating rib 22 and the mating groove 311, the booster 3 is prevented from moving in the direction perpendicular to the first direction DI, namely in the second direction D2, also referred to as the left-right direction or the lateral direction. In this way, the booster 3 may be firmly connected to the backrest assembly 2.

[0158] In this embodiment, when the booster 3 is required to be removed from the backrest assembly 2, refer to FIG. 8, and the unlocking member 322 is rotated in the clockwise direction Rl. When the unlocking member 322 is rotated from the first position to the third position, the end of the U-shaped unlocking member 322 abuts against the driving part 3213 of the locking member 321. When the unlocking member 322 is further rotated from the third position to the second position, the end of the unlocking member 322 pushes against the driving part 3213 to rotate the driving part 3213 clockwise, so that the locking member 321 moves from the locked position to the unlocked position. Referring to FIG. 9, when the unlocking member 322 is rotated to the second position, the locking member 321 is pushed to the unlocked position, and the hook part of the locking member 321 is retracted into the channel 313 from the second groove 3112, and the locking member 321 is disengaged from the cross bar 23. The unlocking member 322 is kept in the second position, and an external force is applied to the booster 3 in the first direction DI to force it to move forward, so that the first engaging inclined surface 3191 of the booster 3 is separated from the second engaging inclined surface 222 (refer to FIG. 7). In this way, the booster 3 may be separated from the backrest assembly 2, and the external force applied to the unlocking member 322 may be removed. The unlocking member 322 is rotated from the second position to the first position under the elastic restoring force of the elastic member 323, and the locking member 321 pivots from the unlocked position to the locked position under the elastic restoring force of the elastic member 323.

[0159] When the booster 3 is required to be installed on the backrest assembly 2, the booster body 31 is pushed in the direction opposite to the first direction DI, so that the first engaging inclined surface 3191 cooperates with the second engaging inclined surface 222. The front end 31c of the booster body 31 is pressed in the direction opposite to the third direction D3, and the upper side surface 231 of the cross bar 23 pushes against the wedge-shaped surface 3212 of the locking member 321, so that the locking member 321 pivots in the clockwise direction. When the cross bar 23 moves relative to the base 3 in the third direction D3 to be separated from the wedge-shaped surface 3212, the locking member 321 pivots in the counterclockwise direction to be engaged with the cross bar 23 under the elastic restoring force of the elastic member 323, thereby installing the booster 3 on the backrest assembly 2.

[0160] In other unillustrated embodiments, the first engaging inclined surface 3191 andthe second engaging inclined surface 222 may be omitted. For example, the connecting mechanisms 32 are disposed at portions of the booster body 31 proximate to the rear end 3 Id and the front end 31c respectively, and the cross bars 23 are disposed at an end of the mating rib 22 adjacent to the backrest body 21 and an end of the mating rib 22 away from the backrest body 21 respectively. The two connecting mechanisms 32 are disposed opposite to each other, that is, the two connecting mechanisms 32 are engaged with the respective cross bars 23 in opposite directions (for example, respectively in the first direction DI and the opposite direction of the first direction DI). In this embodiment, the movements of the booster 3 in the direction parallel to the first direction DI (i.e., in the front-back direction) and in the direction parallel to the third direction D3 (i.e., in the up-down direction) are prevented by the two connecting mechanisms 32 being engaged with the two cross bars 23, respectively, so that the booster 3 is firmly connected to the backrest assembly 2.

[0161] As shown in FIGS. 10 to 12, the booster 3 is further provided with a crotch strap hole 37. The crotch strap 41 (refer to FIG. 1) of the child safety seat may extend through the crotch strap hole 37. The crotch strap hole 37 penetrates through the booster body 31. The crotch strap hole 37 extends through the upper surface 31a and the lower surface 31b of the booster body 31, that is, the crotch strap hole 37 has a crotch strap outlet 37a located on the upper surface 31a and a crotch strap inlet 37b located on the lower surface 31b. An end of the crotch strap 41 is located on the lower surface 31b, and another end of the crotch strap 41 extends through the crotch strap hole 37 to the upper surface 31a. Continuing to refer to FIG. 12, the crotch strap hole 37 is in communication with to a guide recess 317 disposed on the lower surface 31b of the booster body 31. Specifically, the crotch strap inlet 37b is located on the bottom wall of the guide recess 317. Two crotch strap holes 37 are provided. The crotch strap holes 37 are distributed in the first direction DI to allow the crotch strap 41 to extend through the corresponding crotch strap hole 37 according to the body shape of the child. In other embodiments, one or more than two crotch strap holes 37 may be provided, which is not limited herein.

[0162] As shown in FIG. 12, in an embodiment, the crotch strap hole 37 is deviated from the storage recess 314, that is, at least one of the crotch strap inlet 37b and the crotch strap outlet 37a of the crotch strap hole 37 is not in communication the storage recess 314. As shownin FIG. 10, in this embodiment, the crotch strap outlet 37a is deviated from the cover 33, that is, the crotch strap outlet 37a is not disposed on the cover 33.

[0163] As shown in FIGS. 27 and 28, in another embodiment, the crotch strap hole 37 extends through the cover 33 and is in communication with the storage recess 314. Specifically, the crotch strap hole 37 is located at the first cover part 33d. The crotch strap outlet 37a is located at the upper cover 33a, and the crotch strap inlet 37b is located at the lower cover 33b. In this way, when the crotch strap 41 is not in use, the crotch strap 41 may be directly stored in the storage recess 314.

[0164] As shown in FIGS. 7, 11 and 12, in an embodiment, the booster 3 is further provided with a shoulder strap adjusting hole 318. The adjusting strap 42 may extend through the shoulder strap adjusting hole 318 to adjust the effective length of the shoulder strap 43. The child safety seat 100 is further provided with an adjusting mechanism 35. At least a portion of the adjusting mechanism 35 is disposed on the booster body 31 and at least partially received in the shoulder strap adjusting hole 318. The adjusting mechanism 35 is connected to the adjusting strap 42 to adjust and lock the effective length of the shoulder strap 43. Referring to FIG. 10, at least a portion of the adjusting mechanism 35 is located on the upper surface 31a of the booster body 31 and located at the front end 31c of the booster body 31 to facilitate the operation of the adjusting mechanism 35. The lower surface 31b of the booster body 31 is provided with a guide recess 317. The guide recess 317 extends from the rear end 3 Id of the booster body 31 to the front end 31c, and the extending direction of the guide recess 317 is substantially parallel to the first direction DI. In this embodiment, the guide recess 317 is located between the two first grooves 3111. The shoulder strap adjusting hole 318 is in communication with the receiving cavity 303. An end of the shoulder strap adjusting hole 318 is located on the upper surface 31a, and another end of the shoulder strap adjusting hole 318 is located on the bottom wall of the second groove 3112 of the mating groove 311. The shoulder strap adjusting hole 318 is in communication with the guide recess 317. The adjusting mechanism 35 is at least partially installed on the upper surface 31a of the booster body 31. The cross bar 23 is provided with a mounting part 235. The adjusting mechanism 35 is connected to the mounting part 235 through the shoulder strap adjusting hole 318. The adjusting strap 42 may extend along the guide recess 317 and be connected to the adjustingmechanism 35 through the shoulder strap adjusting hole 318. The adjusting mechanism 35 has a locked state and an unlocked state. When the adjusting mechanism 35 is in the unlocked state, the adjusting strap 42 may move bidirectionally relative to the adjusting mechanism 35, so that the effective length of the shoulder strap 43 may be increased or decreased. When the adjusting mechanism 35 is in the locked state, the adjusting strap 42 may only move unidirectionally relative to the adjusting mechanism 35, so that the effective length of the shoulder strap 43 may be reduced by pulling the adjusting strap 42.

[0165] FIG. 21 is a schematic view of an adjusting mechanism 35 according to another embodiment of the present application.

[0166] As shown in FIG. 21, in another embodiment, the child safety seat 100 further includes an adjusting mechanism 35. The adjusting mechanism 35 in this embodiment differs from the adjusting mechanism 35 in the above embodiment shown in FIGS. 7, 11 and 12 in at least following configurations. The adjusting mechanism 35 includes a seatbelt locking assembly 351 and a seatbelt-adjustment unlocking member 352. Referring to FIG. 24, the seatbelt locking assembly 351 is disposed on the cross bar 23. The adjusting strap 42 of the seat belt 4 may extend through the seatbelt locking assembly 351, be locked by the seatbelt locking assembly 351. The seatbelt locking assembly 351 has a locked state and an unlocked state. When the seatbelt locking assembly 351 is in the locked state, the adjusting strap 42 may move unidirectionally relative to the seatbelt locking assembly 351 to tighten the shoulder strap 43 of the seat belt 4. When the seatbelt locking assembly 351 is in the unlocked state, the adjusting strap 42 may move bidirectionally relative to the seatbelt locking assembly 351 to tighten and loosen the shoulder strap 43 of the seat belt 4.

[0167] Referring to FIG. 21, the seatbelt-adjustment unlocking member 352 is movably disposed on the booster 3, specifically, the seatbelt-adjustment unlocking member 352 is movably disposed on the cover 33. The seatbelt-adjustment unlocking member 352 is detachably connected to the safety belt locking assembly 351 in a driven manner. That is, the seatbelt-adjustment unlocking member 352 is connected to the safety belt locking assembly 351 in a driven manner, and may be separated from the safety belt locking assembly 351. The seatbelt-adjustment unlocking member 352 has an operating section 3523a and a driving end 3522. The operating section 3523a is exposed on the upper surface 31a of the booster 3. Thedriving end 3522 is located on the lower surface 31b of the booster 3. The operating section 3523a may be operated to allow the driving end 3522 to push against the safety belt locking assembly 351 to switch from the locked state to the unlocked state. Specifically, the seatbeltadjustment unlocking member 352 is pivotally connected to the booster body 31 of the booster 3 by a pivot shaft 3521. The pivot shaft 3521 is connected to an end of the operating section 3523a away from the driving end 3522. In this embodiment, the seatbelt-adjustment unlocking member 352 is integrally formed. The upper surface of the operating section 3523a forms a concave pressing recess 3523 recessed downwards. The pivot shaft 3521 is connected to the lower surface of the operating section 3523a. The pressing recess 3523 and the driving end 3522 are both located on the same side of the pivot shaft 3521. When the pressing recess 3523 is pressed downward, the driving end 3522 is rotated around the pivot shaft 3521 and pushes against the safety belt locking assembly 351. As shown in FIGS. 31 and 32, the seatbeltadjustment unlocking member 352 is located between the two openable mechanisms 39 (i.e., between the two openable unlocking members 391).

[0168] Referring to FIGS. 21 and 24, the seatbelt locking assembly 351 includes a locking base 3511 and a locking block 3512. The locking block 3512 is pivotally connected to the locking base 3511. The locking base 3511 is fixedly disposed on or integrally formed on the cross bar 23. A torsion spring (not shown) is disposed between the locking base 3511 and the locking block 3512. When the seatbelt-adjustment unlocking member 352 is operated, the driving end 3522 is rotated around the pivot shaft 3521 and pushes against the locking block 3512 to rotate, so that the adjusting mechanism 35 is switched from the locked state to the unlocked state. When the unlocking member 352 is not operated, the locking block 3512 is rotated to an initial position under the elastic restoring force of the torsion spring, and in this process, the locking block 3512 pushes against the seatbelt-adjustment unlocking member 352 to rotate to the initial position.

[0169] FIG. 48 is a schematic view of an adjusting mechanism 35 according to another embodiment of the present application. The adjusting mechanism 35 in this embodiment differs from the adjusting mechanism 35 in the above embodiment shown in FIG. 21 in at least following configurations.

[0170] As shown in FIG. 35 and FIGS. 46 to 48, the adjusting mechanism 35 includes aseatbelt locking assembly 351 and a seatbelt-adjustment unlocking member 352. For the configuration of the seatbelt locking assembly 351, reference may be made to the configuration of the seatbelt locking assembly 351 in the above embodiment, which will not be described in detail herein. The seatbelt-adjustment unlocking member 352 is movably disposed on the cover 33. The seatbelt- adjustment unlocking member 352 moves approximately in the up-down direction, that is, the seatbelt-adjustment unlocking member 352 moves approximately in the direction perpendicular to the upper surface 31a of the booster body 31. The cover 33 is provided with a through passage 336. The through passage 336 extends through the upper cover 33a and the lower cover 33b. Two openings of the through passage 336 are formed in the upper cover 33a and the lower cover 33b respectively. The seatbelt-adjustment unlocking member 352 has the operating section 3523a and the driving end 3522. The operating section 3523a is exposed on the upper surface 31a of the booster 3 through the opening on the upper cover 33a, and the driving end 3522 may extend out of the lower surface 31b of the booster 3 through the opening on the lower cover 33b. In this embodiment, the seatbelt-adjustment unlocking member 352 is integrally formed. The concave pressing recess 3523 is recessed downward and formed on the upper surface of the operating section 3523a. The operating section 3523a is provided with a first limiting part 3524, and the through passage 336 is provided with a second limiting part 3361. The second limiting part 3361 is disposed on the upper cover 33a and located at the opening of the upper cover 33a. The first limiting part 3524 is configured to abut against the second limiting part 3361 to limit at least a portion of the seatbelt-adjustment unlocking member 352 in the through passage 336, so as to prevent the seatbelt-adjustment unlocking member 352 from being separated from the through passage 336. The driving end 3522 is provided with a limit hook 3525. The sidewall of the through passage 336 is provided with a limit recess 3363. The limit recess 3363 is disposed at the opening of the lower cover 33b. The limit hook 3525 is configured to be engaged with the limit recess 3363 to prevent the seatbelt-adjustment unlocking member 352 from being separated from the through passage 336.

[0171] When the seatbelt-adjustment unlocking member 352 is operated, the seatbeltadjustment unlocking member 352 moves downward, the driving end 3522 extends out of the through passage 336 and push against the locking block 3512 of the seatbelt locking assembly 351 to rotate, so that the adjusting mechanism is switched from the locked state to the unlockedstate, and the adjusting strap 42 may be adjusted bidirectionally.

[0172] Referring to FIG. 48, the adjusting mechanism 35 further includes an adjusting reset member 353. The adjusting reset member 353 is disposed in the through passage 336 and abuts against the operating section 3523a of the seatbelt-adjustment unlocking member 352. The adjusting reset member 353 provides an acting force for the seatbelt-adjustment unlocking member 352, so that the seatbelt-adjustment unlocking member 352 may move and reset to the initial position, and whereby the adjusting mechanism 35 is switched from the unlocked state to the locked state. Specifically, when the seatbelt-adjustment unlocking member 352 is not operated, the seatbelt-adjustment unlocking member 352 is moved to the initial position under the action of the adjusting reset member 353, and the driving end 3522 does not push against the locking block 3512 of the seatbelt locking assembly 351. The locking block 3512 rotates and resets under the action of the torsion spring, so that the adjusting mechanism 35 is switched to the locked state. In this embodiment, the adjusting reset member 353 is, for example, a compression spring. A first boss 3362 is disposed in the through passage 336. A second boss 3526 is disposed in the operating section 3523a. The first boss 3362 is arranged to face the second boss 3526. An end of the adjusting reset member 353 is sleeved on the first boss 3362, and another end of the adjusting reset member 353 is sleeved on the second boss 3526 and abuts against the operating section 3523a. In this way, the adjusting reset member 353 may be prevented from deflecting during the elastic energy storage process.

[0173] The present application further provides an inclination adjusting device, which may be disposed on the child safety seat 100.

[0174] As may be seen from the above description, in some embodiments, the child safety seat 100 is further provided with an inclination adjusting device 5. By adjusting the inclination adjusting device 5, the inclination angle 9 between the backrest assembly 2 and the base 9 (i.e., the inclination angle 9 of the backrest body 21 relative to the base 9) may be adjusted.

[0175] As shown in FIGS. 21 and 22, in another embodiment, the inclination adjusting device 5 is connected between the base 9 and the seat assembly 10, and at least a portion of the inclination adjusting device 5 is located between the base 9 and the mating rib 22. The inclination adjusting device 5 has a locked state and an unlocked state. The inclination adjusting device 5 includes an engaging mechanism 51 and an operating assembly 520. The engagingmechanism 51 is connected between the base 9 and the mating rib 22 and may be switched between a locked position and an unlocked position. The operating assembly 520 is connected to the engaging mechanism 51 in a driven manner. The operating assembly 520 may be operated to drive the engaging mechanism 51 to switch from the locked position to the unlocked position. When the engaging mechanism 51 is in the unlocked position, the inclination adjusting device 5 is in the unlocked state, and the mating rib 22 of the backrest assembly 2 is allowed to slide relative to the base 9, so that the inclination angle 9 of the backrest body 21 relative to the base 9 may be adjusted and changed. When the engaging mechanism 51 is in the locked position, the inclination adjusting device 5 is in the locked state, and the mating rib 22 is prevented from sliding relative to the base 9, thereby locking the inclination angle 9 of the backrest body 21 relative to the base 9.

[0176] As shown in FIGS. 21 and 22, in another embodiment, the inclination adjusting device further includes a fixing member 53. The engaging mechanism 51 is pivotally disposed on one of the seat assembly 10 and the base 9, and is provided with an engaging rod 511. The fixing member 53 is disposed on another of the seat assembly 10 and the base 9, and is provided with a plurality of engaging recesses 531 that are arranged sequentially in the front-back direction. The engaging rod 511 may selectively engage with one of the plurality of engaging recesses 531 to limit the seat assembly 10 at a desired angle. When the engaging mechanism 51 pivots to disengage the engaging rod 511 from the respective one of the plurality of engaging recesses 531, the seat assembly 10 may move relative to the base 9 in the front-back direction. In this embodiment, as shown in FIGS. 24 to 26, the engaging mechanism 51 is pivotally disposed on the seat assembly 10, and specifically, the engaging mechanism 51 is pivotally connected to the mating rib 22. The fixing member 53 is fixedly disposed on the base 9. When the engaging rod 511 is engaged with the rearmost engaging recess 531 on the base 9, the angle 9 between the backrest assembly 2 and the base 9 is the largest, that is, the seat assembly 10 is in an upright position. When the engaging rod 511 is engaged with the frontmost engaging recess 531 on the base 9, the angle 9 between the backrest assembly 2 and the base 9 is the smallest, that is, the seat assembly 10 is in a lie-flat position). In other embodiments, according to actual needs, the engaging mechanism 51 may be disposed on the base 9, and the fixing member 53 may be disposed on the seat assembly 10. In other unillustrated embodiments, thefixing member 53 may also be omitted, and the plurality of engaging recesses 531 may be directly disposed on the base 9 or the seat assembly 10, which is not limited herein.

[0177] Referring to FIGS. 21 and 30, in another embodiment, the operating assembly 520 is movably disposed on the seat body 1. The seat body 1 is, for example, a booster 3. The operating assembly 520 includes a first operating member 52, a second operating member 56 and an operating reset member 54. The second operating member 56 is movably disposed on the seat body 1. The first operating member 52 is movably disposed on the seat body 1 and is connected to the driving member 512 of the engaging mechanism 51 in a driven manner. The moving direction of the second operating member 56 is parallel to the moving direction of the first operating member 52. The second operating member 56 is connected to the first operating member 52 and may be operated to drive the first operating member 52 to move, thereby driving the engaging mechanism 51 to switch from the locked position to the unlocked position. Referring to FIG. 23, the first operating member 52 is roughly U-shaped. The first operating member 52 is movably disposed in the seat body 1 and has an operating part 521 and an operating driving part 522 connected to two ends of the operating part 521. The operating part 521 is connected to the second operating member 56. The operating driving part 522 is connected to the engaging mechanism 51 in a driven manner. When the second operating member 56 is operated, the first operating member 521 is driven to move in the seat body 1 by the operating part 521, and the operating driving part 522 of the first operating member 521 drives the engaging mechanism 51 to rotate around the pivot axis X (see FIG. 24) relative to the mating rib 22, so that the engaging mechanism 51 rotates from the locked position to the unlocked position. In this embodiment, the seat body 1 is provided with an operating recess 3103. The operating recess 3103 is located at the front end 31c of the seat body 1 and at the lower surface 31b of the seat body 1. The second operating member 56 is located at the operating recess 3103. In this way, the second operating member 56 may be conveniently operated via the operating recess 3103, and the second operating member 56 may be prevented from interfering with a child sitting in the seat body 1, and may be prevented from being accidentally moved by the child.

[0178] As shown in FIG. 21, the operating reset member 54 is disposed between the first operating member 52 and the seat body 1, and the operating reset member 54 is configured tobias the first operating member 52 to move the first operating member 52 toward the initial position. When the first operating member 52 is in the initial position, the inclination adjusting device 5 is in the locked state, and the engaging mechanism 51 is in the locked position. In this embodiment, the operating reset member 54 is, for example, a compression spring. The operating reset member 54 is located in the seat body 1. An end of the operating reset member 54 abuts against the seat body 1 , and another end of the operating reset member 54 abuts against the first operating member 52. Specifically, the other end of the operating reset member 54 abuts against the operating part 521 of the first operating member 52.

[0179] As shown in FIGS. 22 and 24 to 26, in another embodiment, the engaging mechanism 51 includes an engaging rod 511 and two driving members 512 connected to the engaging rod 511. The two driving members 512 and the engaging rod 511 together form a roughly U-shaped structure. The two driving members 512 are respectively pivotally connected to the mating ribs 22 by connecting pins 501, and specifically, each of the driving members 512 is pivotally connected to the rib housing 227 of the corresponding mating rib 22 by the connecting pin 501. The driving member 512 is roughly L-shaped. The driving member 512 has a first driving end 5121 and a second driving end 5122. The first driving end 5121 extends upward roughly in the vertical direction (i.e., the up-down direction), and the second driving end 5122 extends roughly in the horizontal direction (i.e., the front-back direction). Referring to FIG. 22, the first driving end 5121 is connected to the operating driving part 522 of the first operating member 52 in a driven manner. Specifically, the operating driving part 522 is provided with a driving groove 523. The first driving end 5121 extends through the driving groove 523. An end of the driving groove 523 may push against the first driving end 5121, thereby driving the driving member 512 to rotate around the connecting pin 501 (or, the pivot axis X). Referring to FIGS. 29 and 30, in this embodiment, the operating driving part 522 is located in the seat body 1. The lower surface 3 lb of the seat body 1 is provided with an insertion hole 3 Ibl . The first driving end 5121 extends into the seat body 1 through the insertion hole 31bl and is inserted into the driving groove 523. In other alternative embodiments, the operating driving part 522 of the first operating member 52 may also extend through the insertion hole 3 Ibl and extend to be blow the seat body 1, and the first driving end 5121 is inserted into the driving groove 523 of the first operating member 52.

[0180] Referring to FIGS. 22 and 23, in another embodiment, the driving groove 523 is in an elongated shape and extends in the moving direction of the first operating member 52, so that only when the first operating member 52 (and thus the second operating member 56) moves a certain distance, may the end of the driving groove 523 may push against the first driving end 5121, that is, a certain amount of idle travel is provided for the second operating member 56, thereby preventing the inclination adjusting device 5 from being accidentally switched to the unlocked state due to an accidental touch, and in particular, preventing the inclination adjusting device 5 from being accidentally unlocked due to an accidental touch when a child is sitting on the child safety seat 100, thereby improving the safety of the child safety seat 100. As shown in FIG. 22, in this embodiment, the first driving end 5121 forms a limiting hook part 5124, which is locked with the end of the driving groove 523, thereby preventing the end of the driving groove 523 from being accidentally separated from the first driving end 5121 when the end of the driving groove 523 pushes against the first driving end 5121.

[0181] As shown in FIGS. 22 and 24, the engaging rod 511 extends in a substantially leftright direction (i.e., in a direction perpendicular to the first direction DI). In order to limit the pivoting travel of the engaging mechanism 51, at least one of the mating ribs 22 is provided with a limiting groove 224, and at least one end of the engaging rod 511 is inserted into the limiting groove 224. The limiting groove 224 is, for example, arc-shaped or elongated. The engaging rod 511 is fixedly or movably connected to the driving member 512. In this embodiment, the engaging rod 511 is movably connected to the second driving end 5122 of the driving member 512, and the engaging rod 511 extends through a second connecting hole 5123 disposed on the second driving end 5122 and is inserted into the limiting groove 224 disposed on the rib body 22. The two mating ribs 22 each are provided with the limiting groove 224. The two ends of the engaging rod 511 are inserted into the limiting grooves 224 respectively.

[0182] Continuing to refer to FIGS. 22 and 24, the second connecting hole 5123 is elongated, and the limiting groove 224 is elongated. The extending direction of the second connecting hole 5123 and the extending direction of the limiting groove 224 intersect with each other. Specifically, the extending direction of the second connecting hole 5123 and the extending direction of the limiting groove 224 are approximately at an angle of 90 degrees, the second connecting hole 5123 extends approximately in the front-back direction, and thelimiting groove 224 extends approximately in the up-down direction. In this way, when the driving member 512 is driven to rotate, the engaging rod 511 may be driven to rotate around the pivot axis X. In other embodiments, the limiting groove 224 and the second connecting hole 5123 may also be in other shapes, as long as the engaging rod 511 may rotate around the pivot axis X within the preset travel. Referring to FIG. 24, in this embodiment, the limiting groove 224 is formed on the rib housing 227 of the mating rib 22. Specifically, the limiting groove 224 is formed on the inner housing 227b.

[0183] As shown in FIGS. 22 and 24, in another embodiment, the engaging mechanism 51 further includes an engaging reset member 513. The engaging reset member 513 is disposed between the mating rib 22 and the driving member 512. The engaging reset member 513 is configured to bias the driving member 512, so that the engaging mechanism 51 is rotated toward the locked position. Specifically, the engaging reset member 513 is, for example, a torsion spring. The engaging reset member 513 is sleeved on the connecting pin 501 which is arranged on the mating rib 22. An end of the engaging reset member 513 abuts against the mating rib 22, and another end of the engaging reset member 513 abuts against the driving member 512.

[0184] In the above embodiment, the operating principle of the inclination adjusting device 5 for an angle adjustment is as follows.

[0185] Referring to FIG. 21, when the angle of the seat assembly 10 relative to the base 9 is required to be adjusted, the second operating member 56 is pulled forward in the front-rear direction (i.e., in the first direction DI), and the second operating member 56 drives the first operating member 52 to move forward. When the first operating member 52 moves to a position where the end of the driving groove 523 pushes against the first driving end 5121 of the driving member 512, the end of the driving groove 523 drives the first driving end 5121 to rotate in the counterclockwise direction around the pivot axis X (see FIG. 24), and drives the second driving end 5122 of the driving member 512 to rotate in the counterclockwise direction around the pivot axis X. Since the engaging rod 511 is connected to the second driving end 5122, the second driving end 5122 drives the engaging rod 511 to rotate in the counterclockwise direction around the pivot axis X, that is, the engaging rod 511 moves upward relative to the base 9, so that the engaging rod 511 is separated from the engaging recess 531, that is, the engaging rod511 is disengaged from the engaging recess 531, so that the mating rib 22 may move in the front-back direction relative to the base 9.

[0186] When the seat assembly 10 is adjusted to a desired angle, the second operating member 56 is released, and the operating part 521 is moved backward under the elastic restoring force of the operating reset member 54, and the end of the driving groove 523 of the first operating member 52 does not push against the first driving end 5121 of the driving member 512. The driving member 512 is rotated in the clockwise direction around the pivot axis X under the elastic restoring force of the engaging reset member 513, and drives the second driving end 5122 of the driving member 512 to rotate in the clockwise direction around the pivot axis X. Since the engaging rod 511 is connected to the second driving end 5122, the second driving end 5122 drives the engaging rod 511 to rotate in the clockwise direction around the pivot axis X, that is, the engaging rod 511 moves downward relative to the base 9, so that the engaging rod 511 is engaged with the engaging recess 531, thereby locking the seat assembly 10 at a desired angle. In this way, the angle of the seat assembly 10 relative to the base 9 may be adjusted.

[0187] FIG. 35 is a perspective view of a child safety seat 100 according to yet another embodiment of the present application.

[0188] As shown in FIGS. 35 to 36, in another embodiment, the child safety seat 100 includes the seat assembly 10, the base 9 and the inclination adjusting device 5. The seat assembly 10 includes the backrest assembly 2 and the seat body 1. The backrest assembly 2 includes the backrest body 21, the mating rib 22 and the cross bar 23. The backrest assembly 2 is slidably disposed on the base 9 by the mating rib 22. The angle 9 of the seat assembly 10 relative to the base 9 may be adjusted by adjusting the inclination adjusting device 5.

[0189] As shown in FIGS. 37, 40 and 41, the mating rib 22 includes the rib body 226 and the rib housing 227 at least partially covering the rib body 226. The rib housing 227 is detachably connected to the rib body 226. The rib housing 227 includes the inner housing 227b and the outer housing 227a that are fastened to each other. The first rib segment 2261 of the rib body 226 is received between the inner housing 227b and the outer housing 227a. The base 9 is provided with the mating member 98 that is slidably mated with the mating rib 22. One of the mating rib 22 and the mating member 98 is provided with the mating recess 225, andanother of the mating rib 22 and the mating member 98 is provided with the mating protrusion 981. The mating recess 225 is arc-shaped and extends in the front-back direction (i.e., in the direction parallel to the first direction DI). The mating protrusion 981 is slidably connected in the mating recess 225. The mating member 98 includes the rear mating member 98a and the front mating member 98b. The mating recess 225 includes: the rear mating recess 225a that is inserted into and mated with the mating protrusion 981 of the rear mating member 98a; and a front mating recess 225b that is inserted into and mated with the mating protrusion 981 of the front mating member 98b. The front mating recess 225b and the rear mating recess 225a are both located below the rib body 226, that is, the front mating recess 225b and the rear mating recess 225a are located between the rib body 226 and the base 9. The front mating recess 225b is disposed on the inner housing 227b, and the opening of the front mating recess 225b faces the outer housing 227b. The rear mating recess 225a is disposed on the outer housing 227a, and the opening of the rear mating recess 225a faces the inner housing 227b.

[0190] The child safety seat 100 in this embodiment differs from the child safety seat 100 in the above embodiment shown in FIG. 19 in at least following configurations.

[0191] As shown in FIGS. 35 to 37, the inclination adjusting device 5 is connected between the base 9 and the seat assembly 10. At least a portion of the inclination adjusting device 5 is located between the base 9 and the mating rib 22 of the backrest assembly 2. The inclination adjusting device 5 includes the engaging mechanism 51 and the operating assembly 520. The engaging mechanism 51 is connected between the base 9 and the mating rib 22 and may be switched between the locked position and the unlocked position. The operating assembly 520 is connected to the engaging mechanism 51 in a driven manner. The operating assembly 520 may be operated to drive the engaging mechanism 51 to switch from the locked position to the unlocked position. The operating assembly 520 is movably disposed on the seat body 1 (i.e., the booster 3). The engaging mechanism 51 includes the engaging rod 511, the driving member 512 connected to the engaging rod 511, and the fixing member 53 provided with the engaging recess 531. The driving member 512 is pivotally connected to two mating ribs 22 through the connecting pin 501. The engaging rod 511 is disposed on the driving member 512 and may be pivoted along with the driving member 512. Optionally, the driving member 512 is pivotally connected to the two mating ribs 22 by the connecting pin 501;alternatively, the driving member 512 is pivotally connected to the mating ribs 22 on the sides through two connecting pins 501 respectively, and the two connecting pins 501 are coaxially disposed.

[0192] Referring to FIGS. 36 and 37, the driving member 512 is located between the two mating ribs 22. The driving member 512 includes the driving body 5125, the first driving end5121 and the second driving end 5122. The first driving end 5121 and the second driving end5122 are connected to the two ends of the driving body 5125 respectively. Specifically, the first driving end 5121 and the second driving end 5122 are connected to the front and rear ends of the driving body 5125 respectively. The first driving end 5121 extends upward approximately in the vertical direction (i.e., the up-down direction). The second driving end 5122 extends approximately in the front-back direction. In other words, the angle, which is formed between the connecting line connecting the first driving end 5121 and the pivot axis X of the driving member 512, and the connecting line connecting the second driving end 5122 and the pivot axis X, is approximately 90°. Optionally, two first driving end 5121 are provided, and two second driving ends 5122 are provided. In other embodiments, one or more first driving ends 5121 may be provided. Similarly, one or more second driving ends 5122 may be provided. Referring to FIG. 37 again, the two first driving ends 5121 are disposed on the left and right sides of the driving body 5125 respectively, and the two second driving ends 5122 are disposed on the left and right sides of the driving body 5125 respectively. Specifically, the two first driving ends 5121, as well as the two second driving ends 5122, are symmetrically disposed on the left and right sides of the driving body 5125, which allows for more balanced and even forces exerted on the driving member 512. More specifically, in the left-right direction, the first driving end 5121 and the second driving end portion 5122 disposed on the same side of the driving body 5125 are respectively located between the corresponding mating rib 22 and the fixing member 53. The engaging rod 511 is inserted into the two first driving ends 5121. At least one end of the engaging rod 511 may extend out of the first driving end 5121 and is inserted into the limiting groove 224 of the mating rib 22. The engaging rod 511 may rotate relative to the limiting groove 224 along with the driving member 512, and the rotational travel of the engaging rod 511 may be limited by the end of the limiting groove 224 blocking the engaging rod 511.

[0193] The driving body 5125 is roughly plate-shaped. The first driving end 5121 may be integrally formed on the driving body 5125, or fixedly disposed on the driving body 5125 by bonding, welding, etc., or disposed on the driving body 5125 by engagement, etc., and the first driving end 5121 protrudes upward from the driving body 5125. The second driving end 5122 may be integrally formed on the driving body 5125, or fixedly disposed on the driving body 5125 by bonding, welding, etc., or disposed on the driving body 5125 by engagement, etc., and the second driving end 5122 extends backward out of the driving body 5125. The driving body 5125 includes a first driving connection part 51251 and a second driving connection part 51252. The first driving connection part 51251 is connected between the two first driving ends 5121, which may allow for more balanced forces exerted on the driving member 512. The second driving connection part 51252 is closer to the engaging rod 511 than the first driving connection part 51251, and the second driving connection part 51252 is located between the pivot axis X and the engaging rod 511. An operating hole 51253 is formed between the first driving connection part 51251 and the second driving connection part 51252, so that the second driving connection part 51252 may be pulled via the operating hole 51253 to rotate the driving member 512, thereby driving the engaging rod 511 to rotate. In this way, when the seat body 1 (that is, the booster 3) is not installed on the backrest assembly 2, the driving member 512 may also be rotated by operating the second driving connection part 51252, thereby adjusting the angle 9 between the backrest assembly 2 and the base 9. In this embodiment, a gap is formed between the engaging rod 511 and the driving member 512, so that it is more convenient to hold the second driving connection part 51252.

[0194] As shown in FIGS. 49 to 50, the child safety seat 100 is further provided with a seat pad 8. The seat pad 8 may be made of fabric or cloth. The seat pad 8 includes a second pad 81 and a first pad 82. An end of the first pad 82 is connected to the booster 3 or the second pad 81 and serves as a pivoting end 823, to allow the first pad 82 to be turned over between an unfolded position and a folded position. The second pad 81 is provided with an avoidance recess 811. When the second pad 81 is disposed on the booster 3, the avoidance recess 811 faces the cover 33. In this way, the cover 33 may be opened or closed via the avoidance recess 811 without removing the seat pad 8. Specifically, the avoidance recess 811 is roughly U- shaped, and an opening of the avoidance recess 811 faces the backrest body 21. The secondpad 81 is provided with an armrest cover 812. The armrest cover 812 is configured to be sleeved on the second armrest part 34b on the rear side of the first sleeve hole 36, so that the second pad 81 may be easily installed on the booster 3, and the second pad 81 may be prevented from being displaced. In this embodiment, the second pad 81 is provided with a first mating part 833, and the booster 3 is provided with a second mating part 337. The first mating part 833 is configured to be detachably connected to the second mating part 337, so that the second pad 81 is detachably disposed on the booster 3. Optionally, one of the first mating part 833 and the second mating part 337 is, for example, a buckle, a convex column or a hanging buckle, and another of the first mating part 833 and the second mating part 337 is, for example, a button hole or a hanging ring. Alternatively, the first mating part 833 and the second mating part 337 are snaps or Velcro that may engage with each other.

[0195] When the first pad 82 is in the unfolded position, the first pad 82 covers the avoidance recess 811 of the second pad 81 and covers the cover 33. The second pad 81 and the first pad 82 collectively cover the booster 3, so that the booster 3 may provide a relatively soft and comfortable seated surface. When the first pad 82 is in the folded position, the cover 33 is exposed from the avoidance recess 811 to allow the cover 33 to be switched between the opened state and the closed state. By arranging the first pad 82 to be capable of being turned over on the booster 3, the cover 33 may be switched between the opened state and the closed state without removing the seat cloth pad 8, so that the items (such as the connecting strap assembly 7) stored in the storage recess 314 may be more conveniently taken out or used. Referring to FIGS. 49 to 50, the pivoting end of the first pad 82 is connected to the booster body 31 of the booster 3, and the rotation direction of the first pad 82 rotating from the unfolded position to the folded position is the same as the rotation direction of the cover 33 rotating from the closed state to the opened state. Specifically, the pivoting end of the first pad 82 is connected to a position on the booster body 31 proximate to the first side 331. More specifically, the pivoting end is located behind the first side 331, that is, the pivoting end is connected to a position on the booster body 31 between the first side 331 and the backrest body 21. The pivoting end of the first pad 82 defines the pivot axis S of the second pad. Also referring to FIGS. 27 and 28, the pivot axis S of the first pad 82 is located behind the second hole 348 of the armrest part 34. That is, the pivot axis S of the first pad 82 is closer to the backrest body 21 than the secondhole 348. In this way, the first pad 82 may be prevented from interfering with the connecting strap assembly 7 that may extend out of the second holes 348. The opening of the avoidance recess 811 of the second pad 81 faces the pivot axis S. The first pad 82 is further provided with a crotch strap through hole 821. The crotch strap 45 may extend through the crotch strap through hole 821 (see FIG. 19). When the first pad 82 is in the unfolded position, the crotch strap through hole 821 is roughly aligned with the crotch strap hole 37. The number of the crotch strap through holes 821 corresponds to the number of the crotch strap holes 37. Continuing to refer to FIGS. 49 to 50, the first pad 82 is further provided with an adjusting opening 822. The adjusting opening 822 is configured for the user to operate the adjusting mechanism 35. When the first pad 82 is in the unfolded position, the adjusting opening 822 exposes the seatbelt-adjustment unlocking member 352 of the adjusting mechanism 35 to allow the seatbelt-adjustment unlocking member 352 to be operated via the adjusting opening 822.

[0196] The first pad 82 is detachably connected to the second pad 81. The second pad 81 is provided with a first connecting member 831. The first pad 82 is provided with a second connecting member 832. The second connecting member 832 is configured to be detachably connected to the first connecting member 831. Optionally, the first connecting member 831 and the second connecting member 832 are, for example, Velcro that may be bonded to each other. The second connecting member 832 is disposed at an end of the second pad away from the pivoting end 823, and the position of the first connecting member 831 corresponds to the position of the second connecting member 832. Through the mutual cooperation between the first connecting member 831 and the second connecting member 832, the second pad 81 and the first pad 82 may be connected to prevent the second pad 81 from being offset or folded, etc.

[0197] In an unillustrated embodiment, the second pad 81 may be omitted. The pivoting end 823 of the first pad 82 is connected to the booster body 31. The second connecting member 832 is disposed at an end of the first pad 82 away from the pivoting end 823. The first connecting member 831 is correspondingly disposed on the booster body 31. In this way, the first pad 82 may be disposed on the booster body 31 and be turned over, and when the first pad 82 is in the unfolded position, the first pad 82 may be fixed to the booster body 31 through the detachable connection between the first connecting member 831 and the second connecting member 832.

[0198] It should be noted that the seat pad 8 in this embodiment may be applied to the child safety seat 100 in any one of the above embodiments as needed, which is not limited herein.

[0199] According to the child carrier and the booster provided by the embodiments of the present application, the booster may detachably connected to the backrest assembly through the connecting mechanism, so that the booster, combining with the backrest assembly and the base, may be used as a child safety seat, and may also be removed and used alone as a booster, thereby meeting the use needs of children of different age groups, and increasing the utilization rate of child safety seats. The connecting mechanism of the present application has a simple structure and is easy to operate, and may enables the rapid removal and installation of the booster.

[0200] According to the inclination adjusting device and the child carrier with the inclination adjusting device provided by the embodiments of the present application, the inclination adjusting device may be operated to allow the seat assembly to slide relative to the base or prevent the seat assembly from sliding relative to the base, so that the inclination angle of the seat assembly relative to the base may be changed or locked, thereby achieving the adjustment of the inclination angle between the seat assembly and the base. The inclination adjusting device according to the embodiments of the present application has a simple structure and is easy to operate.

[0201] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features are described in the embodiments. However, as long as there is no contradiction in the combination of these technical features, the combinations should be considered as in the scope of the present application.

[0202] The above-described embodiments are only several implementations of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the present application. It should be understood by those of ordinary skill in the art that various modifications and improvements can be made without departing from the concept of the present application, and they all fall within the protection scope of the present application. Therefore, the patent protection of the present application shallbe defined by the appended claims.

Claims

CLAIMS1. A child carrier, comprising: a backrest assembly comprising a cross bar; and a booster, comprising: a booster body having a lower surface, the lower surface being provided with a mating groove configured to receive the cross bar; and a connecting mechanism disposed on the booster body and comprising a locking member; wherein the booster is connected to the backrest assembly by the connecting mechanism; the locking member is movably connected to the booster body and capable of being switched between an unlocked position and a locked position; an end of the locking member forms a hook part configured to be engaged with the cross bar, the locking member, when in the locked position, is configured to be engaged with the backrest assembly to allow the booster to be connected to the backrest assembly; and the locking member, when in the unlocked position, is configured to be disengaged from the backrest assembly to allow the booster to be separated from the backrest assembly.

2. The child carrier according to claim 1, wherein the locking member is pivotally connected to the booster body, and is capable of pivoting between the unlocked position and the locked position; when the locking member is in the locked position, the hook part is inserted into the mating groove to be engaged with the cross bar; and when the locking member is in the unlocked position, the hook part is separated from the mating groove to be disengaged from the cross bar.

3. The child carrier according to claim 2, wherein: the backrest assembly further comprises a backrest body and mating ribs, wherein each mating rib extends in a front-back direction, and an end of each mating rib is connected to the backrest body, and another end of the mating rib is connected to the cross bar.

4. The child carrier according to claim 3, wherein:the mating groove comprises: two first grooves extending from a rear end to a front end of the booster body, and configured to at least partially receive the mating ribs, respectively; and a second groove located at the front end of the booster body, ends of the second groove being connected to the first groove, and the second groove being configured to at least partially receive the cross bar; wherein when the locking member is in the locked position, the hook part is inserted into the second groove to be engaged with the cross bar.

5. The child carrier according to claim 4, wherein: the locking member is disposed at a front end of the booster; a rear end of the booster is provided with a first engaging inclined surface configured to be engaged with the backrest assembly; the backrest body or the mating rib is provided with a second engaging inclined surface, and the second engaging inclined surface is disposed opposite to the cross bar; the second engaging inclined surface is configured to abut against the first engaging inclined surface of the booster to lock the booster between the backrest body and the mating ribs.

6. The child carrier according to any one of claims 1 to 5, wherein the connecting mechanism further comprises an unlocking member; the unlocking member is pivotally connected to the booster body and is capable of being switched between a first position and a second position to drive the locking member to pivot between the locked position and the unlocked position; when the unlocking member is in the first position, the locking member is in the locked position; and when the unlocking member is in the second position, the locking member is in the unlocked position.

7. The child carrier according to claim 6, wherein: the unlocking member has a handle part, and an upper surface of the booster body is provided with a receiving groove; when the unlocking member pivots to the first position, the handle part is received in thereceiving groove; and when the unlocking member pivots to the second position, the handle part of the unlocking member is disengaged from the receiving groove.

8. The child carrier according to any one of claims 6 or 7, wherein the unlocking member further has a pivoting recess, the locking member is provided with a driving part, and the unlocking member has a third position between the first position and the second position; when the unlocking member pivots from the first position to the third position, the pivoting recess of the unlocking member does not abut against the driving part, and the locking member remains in the locked position; when the unlocking member pivots from the third position to the second position, the pivoting recess of the unlocking member pushes against the driving part, so that the locking member pivots from the locked position to the unlocked position.

9. The child carrier according to any one of claims 6 to 8, wherein: the connecting mechanism further comprises a first elastic member; the first elastic member has a first end connected to the booster body, a second end connected to the unlocking member, and a third end connected to the locking member; the second end biases the unlocking member toward the first position; and the third end biases the locking member toward the locked position.

10. The child carrier according to any one of claims 6 to 9, wherein: the connecting mechanism further comprise a second elastic member and a third elastic member; an end of the second elastic member is connected to the booster body, and another end of the second elastic member is connected to the unlocking member; the second elastic member biases the unlocking member toward the first position; an end of the third elastic member is connected to the booster body, and another end of the third elastic member is connected to the locking member; and the third elastic member biases the locking member toward the locked position.

11. The child carrier according to any one of claims 6 to 10, wherein the booster body is provided with a storage recess and a cover; the cover is openable and rotatably disposed at the storage recess, and the unlocking member is pivotally connected to the cover; when the cover is in a closed state, the unlocking member is engaged with the lockingmember; and when the cover is in an opened state, the unlocking member is separated from the locking member.

12. The child carrier according to claim 11, wherein a rotation direction of the cover when the cover is being opened is opposite to a rotation direction of the unlocking member when the unlocking member is performing unlocking.

13. The child carrier according to any one of claims 1 to 12, wherein the booster further comprises a crotch strap hole; an upper surface of the booster body is provided with a storage recess configured for storage of items, and an openable cover is disposed at an opening of the storage recess; an openable mechanism is disposed on the cover and is configured to lock the cover in a closed state; and the crotch strap hole is configured to penetrate through the cover.

14. The child carrier according to claim 13, wherein the storage recess is further provided with a connecting strap assembly; the connecting strap assembly comprises a webbing and a connector; the connector is connected to the webbing, and is capable of being engaged with a car seat; an end of the cover is pivotally connected to the booster body, and the openable mechanism is disposed at another end of the cover; and the cover, when in the closed state, is configured to position at least a portion of the connecting strap assembly in the storage recess; the webbing comprises a first webbing and a second webbing; each of two ends of the first webbing is provided with one connector; an end of the second webbing is connected to a middle portion of the first webbing; and another end of the second webbing is connected to the storage recess; the booster is provided with two armrest parts, and each armrest part has a second hole and a first hole that are arranged in a front-back direction; two connectors are configured to extend through two second holes, respectively; and a car safety belt is configured to extend through two first holes.

15. The child carrier according to any one of claims 1 to 14, further comprising an adjusting mechanism, wherein the adjusting mechanism comprising: a seatbelt locking assembly disposed on the backrest assembly and configured to lock anadjusting strap of the seat belt, and having a locked state and an unlocked state; and a seatbelt-adjustment unlocking member movably extending through the booster, wherein: the seatbelt-adjustment unlocking member has an operating section and a driving end; the operating section is exposed on an upper surface of the booster; the driving end is located on a lower surface of the booster; and the operating section is operable to allow the driving end to push against the seatbelt locking assembly to switch from the locked state to the unlocked state.

16. A child carrier, comprising: a backrest assembly; a booster, removably attached to the backrest assembly; a base; and an inclination adjusting device, wherein the backrest assembly is slidably disposed on the base to change an inclination angle of the booster relative to the base; the backrest assembly comprises a backrest body, and a mating rib connected to the backrest body; and the mating rib is slidably disposed on the base; the inclination adjusting device comprises: an engaging mechanism connected between the base and the mating rib, and capable of being switched between a locked position and an unlocked position, wherein when the engaging mechanism is in the locked position, the mating rib is prevented from sliding relative to the base; and when the engaging mechanism is in the unlocked position, the mating rib is allowed to slide relative to the base; and an operating assembly movably disposed on the booster, wherein the operating assembly is connected to the engaging mechanism in a driven manner, and is capable of being separated from the engaging mechanism; and the operating assembly is operable to drive the engaging mechanism to switch from the locked position to the unlocked position.

17. The child carrier according to claim 16, wherein: the operating assembly comprises: a first operating member movably disposed on the booster and connected to the engaging mechanism in a driven manner; andan operating reset member disposed between the first operating member and the booster, the operating reset member being configured to bias the operating assembly to cause the first operating member to move toward an initial position.

18. The child carrier according to any one of claims 16 or 17, wherein the engaging mechanism comprises: an engaging rod; a driving member pivotally disposed on one of the mating rib and the base, the driving member having a first driving end and a second driving end, the first driving end being connected to the first operating member in a driven manner, and the second driving end being connected to the engaging rod; and a plurality of engaging recesses disposed on another of the mating rib and the base; wherein when the engaging mechanism is in the locked position, the engaging rod is engaged with one of the plurality of engaging recesses to prevent the mating rib from sliding relative to the base; and when the engaging mechanism is in the unlocked position, the engaging rod is disengaged from the corresponding one of the plurality of engaging recesses to allow the backrest assembly to slide relative to the base.

19. The child carrier according to claim 18, wherein: the driving member is pivotably disposed on the mating rib, the mating rib is provided with a limiting groove, and at least one end of the engaging rod is inserted into the limiting groove.

20. The child carrier according to claim 19, wherein the second driving end is provided with a second connecting hole, the engaging rod extends through the second connecting hole and is inserted into the limiting groove, the second connecting hole is elongated, the limiting groove is elongated, and an extending direction of the second connecting hole intersects with an extending direction of the limiting groove.

21. The child carrier according to any one of claims 18 to 20, wherein the engaging mechanism further includes an engaging reset member; and the driving member is pivotallydisposed on the mating rib, wherein the engaging reset member is disposed between the mating rib and the driving member, and the engaging reset member is configured to bias the driving member to rotate the engaging mechanism toward the locked position.

22. The child carrier according to any one of claims 18 to 21, wherein the operating assembly includes a first operating member movably disposed on the booster, the first operating member has an operating driving part provided with a driving groove, wherein the driving groove extends in a moving direction of the first operating member, the first driving end is inserted into the driving groove, the operating driving part is located in the booster, the booster is provided with an insertion hole, the first driving end extends into the booster through the insertion hole and is inserted into the driving groove.

23. The child carrier according to any one of claim 18 to 22, wherein the driving member includes a driving body and is provided with a plurality of first driving ends, wherein the driving body includes a first driving connection part connected to the plurality of first driving ends.

24. The child carrier according to claim 23, wherein the driving body further includes a second driving connection part, wherein the second driving connection part is closer to the engaging rod than the first driving connection part, an operating hole is formed between the second driving connection part and the first driving connection part, and the second driving end is connected to the second driving connection part.

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