Child safety seat

Abstract

A child safety seat, comprising a base, a seat body, and at least one limiting structure. The limiting structure is divided into an upper limiting structure and a lower limiting structure. When the seat body is at a forward position, the seat body is engaged with a supporting frame by means of the upper limiting structure, and the lower limiting structure is in a separated state. When the seat body is at a rearward position, the seat body is engaged with the supporting frame by means of the lower limiting structure, and the upper limiting structure is in a separated state. Thus, the seat body is prevented from tipping forward relative to the base.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese patent application No. 2024101783676, filed on February 08, 2024, the disclosure of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to a child safety seat and a base thereof. BACKGROUND

[0003] Child safety seat can be mounted on a vehicle seat for a child to sit on, which can effectively ensure the safety of the child. A typical child safety seat includes a base and a child seat. The child seat can be mounted on the base in a forward-facing or rearward-facing manner. The child seat defines a space for accommodating the child. The tilt angle of the child seat relative to the base can be adjusted to provide comfortable and safe support for the child in a sitting or reclining position. It is urgent to provide a simple mechanism to adjust the tilt angle of the child seat relative to the base. SUMMARY

[0004] In an aspect, the present application provides a child safety seat. The child safety seat include: a base including a base housing and a support frame accommodated in the base housing, where the base housing includes a base portion and an abutting portion extending upward from the base portion, the base portion is configured to abut against a seat surface of a vehicle seat, and the abutting portion is configured to abut against a seat back of the vehicle seat; a seat body including a seat portion and a backrest part extending upward from the seat portion, the seat body being mounted on the base; and at least one limiting structure. The seat body and the support frame are adapted to be engaged with each other by the at least one limiting structure, so as to prevent the seat body from tipping forward relative to the base.

[0005] In an embodiment of the present application, the seat body has a forward-facing position and a rearward-facing position relative to the base. The at least one limiting structure includes an upper limiting structure and a lower limiting structure. When the seat body is in the forward-facing position, the backrest part and the support frame are engaged with each other by the upper limiting structure, and the lower limiting structure is in a disengaged state. When the seat body is in the rearward-facing position, the seat portion and the support frame are engaged with each other by the lower limiting structure, and the upper limiting structure is in a disengaged state.

[0006] In an embodiment of the present application, a top of the abutting portion is provided with a first opening. An upper end of the support frame extends through the first opening. The at least one limiting structure includes an upper limiting structure. The upper limiting structure includes a first upper limiting member disposed at the upper end of the support frame and a second upper limiting member disposed on a back surface of the backrest part. When the seat body is in a forward-facing position relative to the base, the first upper limiting member and the second upper limiting member cooperate with each other. A cross section of at least one of the first upper limiting member and the second upper limiting member are hook-shaped.

[0007] In an embodiment of the present application, the child safety seat further includes a top tether. The first upper limiting member is provided with a support ring. A first end of the top tether is connected to the base, and a second end of the top tether extends upward so that a middle part of the top tether is passed around the support ring.

[0008] In an embodiment of the present application, the child safety seat further includes a mounting base. The mounting base is connected to the base housing in a non-rotatable manner. The mounting base is located between the base and the seat body. The at least one limiting structure includes a lower limiting structure. The lower limiting structure includes a first lower limiting member and a second lower limiting member. The first lower limiting member extends from the support frame and extends through the mounting base towards the seat portion. The second lower limiting member is configured to protrude from a back surface of the seat portion. When the seat body is in the rearward-facing position relative to the base, the first lower limiting member and the second lower limiting member cooperate with each other.

[0009] In an embodiment of the present application, when the seat body is in the rearwardfacing position relative to the base, the first lower limiting member and the second lower limiting member are in clearance fit. A cross section of at least one of the first lower limiting member and the second lower limiting member is hook-shaped.

[0010] In an embodiment of the present application, the support frame includes two longitudinal rods and a second transverse rod connected between the two longitudinal rods. The second transverse rod is provided with a fixing base. The second lower limiting member protrudes from the fixing base.

[0011] In an embodiment of the present application, the abutting portion of the base housing is provided with a clamping groove and a belt clamper. A first end of the belt clamper is pivotally connected to the base housing, and a second end of the belt clamper is provided with a third locking mechanism. The belt clamper is locked in the clamping groove by the third locking mechanism, so as to clamp a vehicle safety belt at the abutting portion.

[0012] In an embodiment of the present application, the support frame is configured to be operably slidable relative to the base housing, so as to change a tilt angle of the seat body relative to the base.

[0013] In an embodiment of the present application, a sliding track is disposed inside the base housing. The support frame slidably cooperates with the sliding track. The sliding track is provided with a plurality of first locking holes. A first locking mechanism is disposed on the supporting frame. The first locking mechanism includes a first locking member. The first locking member is selectively engaged with one of the plurality of first locking holes, so as to lock the supporting frame at different positions of the sliding track.

[0014] In an embodiment of the present application, the child safety seat further includes a mounting base. The seat body is fixedly mounted on the support frame by the mounting base and is slidable forward and backward relative to the base housing.

[0015] In an embodiment of the present application, the base portion is provided with a plurality of first locking holes. A first locking mechanism is disposed on the mounting base. The first locking mechanism includes a first locking member, a first unlocking member, and a first traction rope. The first locking member is selectively engaged with one of the plurality of first locking holes to lock the seat body at different tilt angles. The first unlocking member is connected to the first locking member by the first traction rope, and configured to drive the first locking member to withdraw from the corresponding first locking hole. The mounting base is further provided with a guide wheel configured to cooperate with the first traction rope.

[0016] In an embodiment of the present application, the mounting base is non-rotatably connected to the base housing. A handle is disposed on a front side of the mounting base. The first unlocking member is disposed on the handle.

[0017] In an embodiment of the present application, at least a portion of the sliding track is formed by an attachment disposed inside the base housing. The attachment is provided with a sliding groove that slidably cooperates with the support frame. A groove wall of the sliding groove is provided with an elongated hole. A pin is disposed on the support frame. The pin may slidably cooperate with the elongated hole.

[0018] In an embodiment of the present application, the support frame is provided with a guide hole slidably cooperating with the first locking member. The first locking member extends through the guide hole and is selectively engaged with one of the plurality of first locking holes.

[0019] In an embodiment of the present application, the support frame includes two longitudinal rods and two first transverse rods connected between the two longitudinal rods. The mounting base includes a covering part and an engaging part protruding downward from the covering part. The engaging part is clamped between the two first transverse rods.

[0020] In an embodiment of the present application, the mounting base has a central hole. The seat body has a rotary shaft. The rotary shaft is pivotally received in the central hole. An axial limiting mechanism is disposed on the rotary shaft. The axial limiting mechanism cooperates with the engaging part to form an engaging groove. The two first transverse rods are engaged with the engaging groove.

[0021] In an embodiment of the present application, the support frame further includes a second transverse rod connected between the two longitudinal rods. The second transverse rod are closer to the abutting portion than the two first transverse rods. The second transverse rod is provided with a fixing base. The fixing base is connected to the mounting base by a fastener.

[0022] In an embodiment of the present application, the axial limiting mechanism includes a limiting flange. The limiting flange abuts against the two longitudinal rods.

[0023] In an embodiment of the present application, the seat portion is pivotally connected to the mounting base such that the seat body has a forward-facing position and a rearwardfacing position. A rotation position of the seat body relative to the mounting base is locked by a second locking mechanism.

[0024] In another aspect, the present application provides a base of a child safety seat. The base includes: a base housing including a base portion and an abutting portion; a first upper limiting member protruding forward from the abutting portion, the first upper limiting member being capable of exerting a backward pulling force to a seat body mounted on the base; a support ring protruding from a rear side of the first upper limiting member; and a top tether. A first end of the top tether is positioned below the support ring, and a second end of the top tether extends upward so that a middle part of the top tether is passed around the support ring.

[0025] In an embodiment of the present application, a support frame is disposed inside the base housing. The first upper limiting member is connected to the support frame.

[0026] In an embodiment of the present application, a top of the abutting portion is provided with a first opening. The support frame slidably cooperate with the base housing. An upper end of the support frame extends through the first opening. The first upper limiting member is connected to the upper end of the support frame.

[0027] In another aspect, the present application further provides a child safety seat, including: a base including a base housing and a support frame accommodated in the base housing; a seat body mounted on the base and having a forward-facing position and a rearwardfacing position relative to the base; and at least one limiting structure disposed between the seat body and the support frame. The base housing is provided with an opening through which the limiting structure extends. The at least one limiting structure includes an upper limiting structure and a lower limiting structure. The upper limiting structure includes a first upper limiting member that is disposed at an upper end of the support frame and exposed from the opening, and a second upper limiting member disposed at a back surface of the seat body. When the seat body is in the forward-facing position, the seat body is engaged with the support frame by the upper limiting structure, and the lower limiting structure is in a disengaged state; when the seat body is in the rearward-facing position, the seat body is engaged with the support frame by the lower limiting structure, and the upper limiting structure is in a disengaged state.

[0028] In an embodiment of the present application, the child safety seat further includes a top tether. A first end of the top tether is connected to the first upper limiting member, and a second end of the top tether is provided with an anchor configured to be connected to a vehicle.

[0029] In an embodiment of the present application, the first upper limiting member is provided with a support ring. The first end of the top tether is connected to the support frame and is passed around the support ring.

[0030] In an embodiment of the present application, the child safety seat further includes a mounting base. The seat body is mounted on the support frame by the mounting base. The support frame is configured to operably slide relative to the base housing, so as to change a tilt angle of the seat body relative to the base housing. The opening includes a first opening disposed at a top of the base housing. The upper end of the support frame extends out of the first opening, to enable the first upper limiting member to be exposed from the base housing. When the support frame slides relative to the base housing, the first upper limiting member remains connected to the second upper limiting member.

[0031] In an embodiment of the present application, the seat body has a rotary shaft. The seat body is pivotally connected to the mounting base by the rotary shaft to rotate between the forward-facing position and the rearward-facing position. The lower limiting structure includes a first lower limiting member and a second lower limiting member. The first lower limiting member extends from the support frame and extends through the mounting base towards the seat body. The second lower limiting member protrudes from a front side of the seat body. When the seat body is in the rearward-facing position relative to the base, the first lower limiting member cooperates with the second lower limiting member.

[0032] In an embodiment of the present application, the base housing is provided with a sliding track therein. The support frame slidably cooperates with the sliding track. The sliding track is provided with a plurality of first locking holes. The support frame is provided with a first locking mechanism including a first locking member. The first locking member is selectively engaged with one of the plurality of first locking holes to position the support frame at different positions of the sliding track.

[0033] In an embodiment of the present application, the child safety seat further includes a first locking mechanism configured to lock a sliding between the support frame and the base housing. The first locking mechanism includes: a first locking member disposed in the mounting base and slidably cooperating with a guide hole of the support frame; a plurality of first locking holes disposed on the base housing; and a reset spring disposed between the mounting base and the first locking member and configured to push the first locking member to be engaged with one of the first locking holes. The first locking member extends through the guide hole and is selectively connected to the one of the plurality of first locking holes, to position the support frame at different positions of the base housing.

[0034] In an embodiment of the present application, the first locking mechanism further includes: a first unlocking member disposed at a handle disposed at a front end of the mounting base; and a first traction rope having an end connected to the first unlocking member and another end connected to the first locking member. The first unlocking member drives the first locking member to be withdrawn from the corresponding one of the first locking holes by the first traction rope.

[0035] In an embodiment of the present application, the child safety seat further includes: a second locking mechanism configured to lock a pivoting between the seat body and the mounting base, the second locking mechanism being located between the seat body and the mounting base. The second locking mechanism includes: a second locking member disposed on the seat body and capable of moving axially relative to the seat body; and a plurality of second locking holes spaced apart on the mounting base. The second locking member is selectively connected to one of the plurality of second locking holes, so as to lock the seat body in the forward-facing position or the rearward-facing position.

[0036] In an embodiment of the present application, the base housing includes a base portion and an abutting portion extending upwardly from the base portion. The abutting portion is configured to abut against a seat back of a vehicle seat. The seat body is mounted on the base portion by the mounting base and is pivotable back and forth. The first opening is disposed at a top of the abutting portion. The abutting portion is provided with a clamping groove and a belt clamper. A first end of the belt clamper is pivotally connected to the base housing, and a second end of the belt clamper is provided with a third locking mechanism. The belt clamper is locked in the clamping groove by the third locking mechanism so as to clamp a vehicle seat belt at the abutting portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings constituting a part of the present application is used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to illustrate the present application and do not constitute an improper limitation on the present application.

[0038] FIG. 1 is a perspective view of a child safety seat according to a first embodiment of the present application.

[0039] FIGS. 2 and 3 are side views of the child safety seat shown in FIG. 1 with a child seat in a forward-facing position and a rearward-facing position, respectively.

[0040] FIGS. 4 and 5 are partial exploded views of the child safety seat shown in FIG. 1 in different perspectives, respectively.

[0041] FIG. 6 is a cross-sectional view taken along a line C-C of FIG. 2.

[0042] FIG. 7 is a perspective view of a mounting base shown in FIGS. 4 and 5.

[0043] FIG. 8 is an exploded view of the mounting base shown in FIG. 7.

[0044] FIG. 9 is a perspective view of the mounting base in FIGS. 4 and 5 from another perspective.

[0045] FIG. 10 is an exploded view of the mounting base shown in FIG. 9.

[0046] FIG. 11 is a perspective view of a support frame and a child seat of the child safety seat shown in FIG. 1.

[0047] FIG. 12 shows a structure in which the child safety seat shown in FIG. 1 is mounted on a vehicle seat.

[0048] FIG. 13 shows an internal structure of the base of the child safety seat shown in FIG. 1.

[0049] FIG. 14 is a perspective view of a child seat and a portion of the base of the child safety seat shown in FIG. 1.

[0050] FIG. 15 is a perspective view of the support frame in FIG. 11.

[0051] FIG. 16 shows an internal structure of the mounting base in FIG. 10.

[0052] FIGS. 17 and 18 are sectional views of the child safety seat shown in FIG. 1 to illustrate a first locking mechanism.

[0053] FIGS. 19 and 20 are side views of the support frame and the child seat of the child safety seat shown in FIG. 11, respectively.

[0054] FIG. 21 is a sectional view of the child safety seat shown in FIG. 1 to illustrate a second locking mechanism.

[0055] FIG. 22 shows the base and the second locking mechanism of the child safety seat shown in FIG. 1.

[0056] FIG. 23 is a perspective view of a child safety seat according to a second embodiment of the present application.

[0057] FIGS. 24 and 25 are side views of the child safety seat shown in FIG. 23 with the child seat in a forward-facing position and a rearward-facing position.

[0058] FIGS. 26 and 27 are different perspective views of a base of the child safety seat shown in FIG. 23, with a belt clamper in different states.

[0059] FIGS. 28 and 29 show an internal structure of the base shown in FIG. 27, with the belt clamper in different states.

[0060] FIG. 30 is a rear view of the base shown in FIG. 29, with a rear housing in FIG. 29 omitted.

[0061] FIG. 31 is a side view of the child seat in FIG. 23.

[0062] FIG. 32 is a partial exploded view of the child seat shown in FIG. 31.

[0063] FIG. 33 shows an internal structure of the child seat shown in FIG. 31.

[0064] FIGS. 34 and 35 are perspective views of a bottom housing in FIG. 32 from different perspectives. DETAILED DESCRIPTION

[0065] First embodiment

[0066] FIG. 1 is a perspective view of a child safety seat 1000 according to a first embodiment of the present application, and FIGS. 2 and 3 are side views showing the child safety seat 1000 in different working states. The child safety seat 1000 includes a base 1 and a seat body 2. The base 1 is configured to be mounted on a vehicle seat 900 (see FIG. 12). The seat body 2 may be mounted to the base 1 in a detachable manner or a non-detachable manner. The seat body 2 is suitable for a child to sit on. In some embodiments, a tilt angle of the seat body 2 relative to the base 1 can be adjusted to meet the sitting needs of the child. In some embodiments, the seat body 2 can rotate relative to the base 1 so that the seat body 2 can have a plurality of working positions. The plurality of working positions include, for example, at least two of a forward-facing position, a rearward-facing position, and a sideward-facing position.

[0067] It should be noted that, in this embodiment, for the child safety seat 1000 in which the seat body 2 has a plurality of working positions, the orientation terms such as "front", "rear / back", "left" or "right" with respect to the seat body 2 are based on the "front", "rear / back", "left", or "right" directions with respect to the child sitting in the seat body 2, and the orientation terms such as "front", "rear / back", "left", or "right" with respect to the base 1 refer to the "front", "rear / back", "left", and "right" directions with respect to the vehicle when the base 1 may be mounted on the vehicle seat 900 ( see FIG. 12). These orientation terms are used herein only to make the description of the embodiments of the present application clearer, and are not intended to improperly limit the scope of protection of the present application. Specifically, the seat body 2 shown in FIG. 2 is in a forward-facing position relative to the base 1. In this case, the front, back, left, and right directions with respect to the seat body 2 are consistent with the front, back, left, and right directions with respect to the base 1. In FIGS. 1 and 2, arrows F and B schematically indicate the "front" and "rear / back" directions with respect to the base 1, respectively, and arrows L and R schematically indicate the "left" and "right" directions with respect to the base 1, respectively. The seat body 2 in FIG. 3 is in a rearward-facing position relative to the base 1, and in this case, the frontward-rearward direction and the leftwardrightward direction with respect to the seat body 2 are opposite to those with respect to the base 1.

[0068] The structures of the base 1 and the seat body 2 will be described in detail below.

[0069] Referring to FIGS. 3, 4 and 12, the base 1 includes a base housing 10, a support frame 19, and a mounting base 13. The base housing 10 may include a base portion 11 and an abutting portion 12 extending upward from the base portion 11. The base portion 11 is configured to abut against or be placed on a seat surface 91 of the vehicle seat 900. The abutting portion 12 is configured to abut against a seat back 92 of the vehicle seat 900. In some embodiments, the base housing 10 may include a plurality of hard housings enclosing the outer contour of the base housing 10. The plurality of hard housings define an internal space of the base housing 10. Referring to FIG. 1, the plurality of hard housings for example, include: an upper housing 1011 and a lower housing 1012 that generally correspond to the base portion 11; and a front housing 1021 and a rear housing 1022 that generally correspond to the abutting portion 12. The upper housing 1011 and the front housing 1021 correspond to a front side of the base housing 10, and the lower housing 1012 and the rear housing 1022 correspond to a rear side of the base housing 10. In other embodiments, the base housing 10 may also have other modifications.

[0070] Referring to FIG. 12, in some embodiments, a clamping groove 1201 and a belt clamper 129 may be disposed on the front surface of the base housing 10. The belt clamper 129 may be locked in the clamping groove 1201 by a third locking mechanism 215. In some embodiments, when the belt clamper 129 is locked in the clamping groove 1201, the belt clamper 129 may be completely embedded in the clamping groove 1201 without protruding from the front surface of the base housing 10. A passage (not shown) configured to clamp a vehicle safety belt 93 (which is shown in dashed lines in FIG. 12) is formed between the wall of the clamping groove 1201 and the belt clamper 129. After the vehicle safety belt 93 passes through the passage between the wall of the clamping groove 1201 and the belt clamper 129, a male buckle of the vehicle safety belt 93 is inserted into a female buckle on the vehicle seat 900, so that the abutting portion 12 of the base 1 is secured to the seat back 92. Although in the illustrated embodiment shown in FIG. 12, a shoulder strap 931 and a waist strap 932 of the vehicle safety belt 93 pass through the passage between the wall of the clamping groove 1201 and the belt clamper 129 at the same time, in some alternative embodiments, only the shoulder strap 931 or the waist strap 932 of the vehicle safety belt 93 may pass through the passage between the wall of the clamping groove 1201 and the belt clamper 129.

[0071] The upper housing 1011 is omitted from the base housing 10 as shown in FIG. 13, to facilitate the illustration of the internal structure of the base housing 10. In some embodiments, a first end of the belt clamper 129 is pivotally connected to the base casing 10 via a shaft 125, and the third locking mechanism 215 is disposed at a second end of the belt clamper 129. The third locking mechanism 215 is configured to lock the relative position between the second end of the belt clamper 129 and the base housing 10, thereby locking the belt clamper 129 in the clamping groove 1201. For example, an exemplary embodiment of the third locking mechanism 215 can refer to the description of the third locking mechanism 215 in the second embodiment below. For example, the third locking mechanism 215 may include an axially movable third locking member. The third locking member is configured to cooperate with a third locking hole disposed on the base housing 10. When the third locking member is separated from the third locking hole, the belt clamper 129 can pivot around the shaft 125 to open the clamping groove 1201, so as to place the vehicle safety belt 93 into the clamping groove 1201 or remove it from the clamping groove 1201.

[0072] The support frame 19 is mounted on the base housing 10 and can slide relative to the base housing 10. Referring to FIG. 11, the mounting base 13 is mounted on the support frame 19 and slides synchronously with the support frame 19. The seat body 2 is mounted on the mounting base 13 and then mounted on the support frame 19. That is, the mounting base 13 is located between the base 1 and the seat body 2. Therefore, when the support frame 19 slides relative to the base housing 10, the mounting base 13 and the seat body 2 slide together relative to the base housing 10, thereby changing the tilt angle of the seat body 2 relative to the base 1. It can be understood that when the support frame 19 slides relative to the base housing 10, the support frame 19 moves forward and backward relative to the base housing 10 and also pivots relative to the base housing 10, thereby driving the seat body 2 to change the tilt angle thereof relative to the base 1. In some embodiments, the support frame 19 is, for example, mainly formed by connecting a plurality of metal tubes by welding, screwing, etc., such that the support frame 19 has sufficient structural strength.

[0073] Referring to FIGS. 13 and 14, in some embodiments, a sliding track 101 is disposed inside the base housing 10. The sliding track 101 extends at least in the base portion 11. The support frame 19 slidably cooperates with the sliding track 101. In some embodiments, the sliding track 101 extends in the abutting portion 12. The upper housing 1011 is omitted from the base housing 10 as shown in FIG. 13, to show a partial structure of the sliding track 101, and a portion of the sliding track 101 located inside the abutting portion 12 is shielded by the front housing 1021. The upper housing 1011 is also omitted from the child safety seat 1000 as shown in FIG. 14, to show a structure in which the support frame 19 may slidably cooperate with the sliding track 101. The support frame 19 can also play a role in enhancing the structural strength of the base housing 10.

[0074] Referring again to FIGS. 4, 12 and 13, in some embodiments, the top of the abutting portion 12 of the base housing 10 has a first opening 1203, and an upper end of the support frame 19 extends through the first opening 1203. In some embodiments, a first upper limiting member 311 is mounted at the upper end of the support frame 19. The structure of the first upper limiting member 311 will be described in detail below. Referring to FIGS. 4 to 12, in some embodiments, a decorative housing 195 may be mounted at the upper end of the support frame 19. The decorative housing 195 slidably cooperates with the first opening 1203 to close the first opening 1203. In addition, the decorative housing 195 shields the unnecessary exposed parts of the upper end of the support frame 19.

[0075] FIG. 15 shows an exemplary structure of the support frame 19. The support frame 19 includes two longitudinal rods 191 and a plurality of transverse rods connected between the two longitudinal rods 191. The plurality of transverse rods includes, but not limited to, a first transverse rod 192 and a second transverse rod 193. The support frame 19 mainly slidably cooperates with the sliding track 101 through the two longitudinal rods 191. Referring to FIGS. 13 and 14, in some embodiments, at least a portion of the sliding track 101 can be defined by an upper housing 1011, a lower housing 1012, a front housing 1021, and a rear housing 1022.

[0076] In some embodiments, at least a portion of the sliding track 101 may be formed by an attachment 1013 located inside the base housing 10. The attachment 1013 is formed with a sliding groove 10130. The longitudinal rod 191 slidably cooperates with the sliding groove 10130. That is, the sliding groove 10130 forms a part of the sliding track 101. In some embodiments, an elongated hole 10131 may be disposed on a groove wall of the sliding groove 10130, and a pin 1916 may be mounted on the longitudinal rod 191. The pin 1916 slidably cooperates with the elongated hole 10131 to limit the sliding stroke of the support frame 19. In some embodiments, the attachment 1013 is mounted on the lower housing 1012 by fasteners, and an opening of the sliding groove 10130 is closed by the lower housing 1012.

[0077] Still referring to FIG. 15, in some embodiments, each of the longitudinal rods 191 may be formed by connecting a plurality of rod segments, which can reduce the difficulty of manufacturing the longitudinal rod 191. Each longitudinal rod 191 may include, for example, a first rod segment 1911, a second rod segment 1912, and a third rod segment 1913.

[0078] Each first rod segment 1911 extends from the inside of the base portion 11 to the inside of the abutting portion 12. The two first rod segments 1911 of the two longitudinal rods 191 are substantially parallel to each other. In some embodiments, each first rod segment 1911 has an arc-shaped segment 19111, and the sliding track 101 also has an arc-shaped track (not labelled) that slidably cooperates with the arc-shaped segment 19111. The arc-shaped segment 19111 is, for example, located at the front end of the first rod segment 1911, corresponding to the sliding track in the base portion 11. The rear end of the first rod segment 1911 has, for example, a straight segment 19112. The straight segment 19112 extends in the abutting portion 12. A first end of the second rod segment 1912 may be inserted into the straight segment 19112, and a second end of the second rod segment 1912 extends toward the top of the abutting portion 12.

[0079] In some embodiments, each second rod segment 1912 has a zigzag shape, so that the distance between the second ends 19122 of the two second rod segments 1912 of the two longitudinal rods 191 is reduced compared with the distance between the first ends of the two second rod segments 1912. The first end 19131 of each third rod segment 1913 is directly or indirectly connected to the second end of the corresponding second rod segment 1912, and the second end 19132 of each third rod segment 1913 extends out of the first opening 1203. The first upper limiting member 311 can be connected to the second ends of the two third rod segments 1912, for example, by welding or fasteners.

[0080] In some embodiments, each longitudinal rod 191 may also be implemented in other ways, for example, the second end of each second rod segment 1912 may extend directly out of the first opening 1203, and the first upper limiting member 311 is connected to the second end of each second rod segment 1912, so that the third rod segment 1913 may be omitted. Alternatively, in some embodiments, each longitudinal rod 191 may be an integrally formed rod.

[0081] Referring to FIGS. 4 to 12, an exemplary structure of the mounting base 13 and an exemplary connection method between the mounting base 13 and the support frame 19 are shown. In some embodiments, the leftward-rightward movement, frontward-backward movement, and upward-downward movement of the mounting base 13 relative to the support frame 19 are restricted. In some embodiments, the rotation of the mounting base 13 relative to the support frame 19 is restricted. The restricted rotation of the mounting base 13 relative to the support frame 19 can also be interpreted as the mounting base 13 and the base housing 10 being connected in a non-rotatable manner relative to each other, that is, the mounting base 13 may not switch the seat body 2 to the forward-facing position or the rearward-facing position by rotating itself relative to the base housing 10.

[0082] Referring to FIGS. 4 to 10, in some embodiments, the mounting base 13 includes an upper casing 1301 and a lower casing 1302. The upper casing 1301 and the lower casing 1302 can be connected to each other by fasteners (not shown). The upper casing 1301 and the lower casing 1302 can define a stepped pivot hole, details thereof may be referred to the central hole 130 hereinafter.

[0083] Referring to FIGS. 4 and 12, the front surface of the base portion 11 is provided with a second opening 110. The mounting base 13 covers the second opening 110. In some embodiments, the mounting base 13 is sized so that when the mounting base 13 follows the support frame 19 to slide relative to the base housing 10, the mounting base 13 remains covering the periphery of the second opening 110, so as to avoid the second opening 110 from being exposed as much as possible. Referring to FIG. 9, in some embodiments, the mounting base 13 includes a covering part 13a covering the second opening 110 and an engaging part 13b protruding downward from the covering part 13a. The size of the engaging part 13b is smaller than that of the covering part 13a.

[0084] Referring to FIG. 11, in some embodiments, the support frame 19 includes two first transverse rods 192. The two first transverse rods 192 and two longitudinal rods 191 enclose a space through which the engaging part 13b of the mounting base 13 extends. In some embodiments, the two first transverse rods 192 are engaged with the engaging part 13b, which can limit the mounting base 13 from moving forward and backward relative to the mounting base of the support frame 19.

[0085] In some embodiments, the engagement between the engaging part 13b and the two first transverse rods 192 can also limit the rotation of the mounting base 13 relative to the support frame 19. For example, the surfaces of the engaging part 13b configured to be engaged with the two first transverse rods 192 can be configured as flat surfaces. The engagement between the engaging part 13b and the two first transverse rods 192 can limit the rotation of the mounting base 13 relative to the support frame 19. Certainly, the rotation of the mounting base 13 relative to the support frame 19 can be limited in many other ways, for example, the mounting base 13 is connected to the support frame 19 through a plurality of fasteners, and the plurality of fasteners can be distributed on the two first transverse rods 192.

[0086] In some embodiments, the engaging part 13b can be clamped between the two longitudinal rods 191, thereby limiting the leftward and rightward movement of the mounting base 13 relative to the support frame 19. Certainly, the left and right movement of the limit seat 1303 relative to the support frame 19 can be limited in many other ways. For example, in some embodiments, two additional longitudinal rods parallel to the longitudinal rods 191 is connected between the two first transverse rods 192, and the two additional longitudinal rods are engaged with the engaging part 13b, so as to limit the leftward and rightward movement of the mounting base 13 relative to the support frame 19. Alternatively, in some embodiments, the mounting base 13 can be directly or indirectly connected to an axial limiting mechanism 6. The axial limiting mechanism 6 can be clamped between the two longitudinal rods 191 to limit the leftward and rightward movement of the mounting base 13 relative to the support frame 19. In addition, the axial limiting mechanism 6 can cooperate with the engaging part 13b to form an engaging groove 1304. The two first transverse rods 192 are engaged with the engaging groove 1304. On the one hand, the forward and backward movement of the mounting base 13 relative to the support frame 19 can be restricted, and on the other hand, the upward and downward movement of the mounting base 13 relative to the support frame 19 can also be restricted.

[0087] In some embodiments, referring to FIGS. 4, 11 and 15, the support frame 19 can also be connected to the mounting base 13 via a fixing base 196. The connection between the fixing base 196 and the support frame 19 and the mounting base 13 can further limit the relative movement and / or relative rotation between the support frame 19 and the mounting base 13.

[0088] As shown in FIGS. 4 and 15, an exemplary structure of the fixing base 196 is shown. The fixing base 196 may include a plate body 1961 and an arm body 1962 protruding from the plate body 1961. The plate body 1961 abuts against the mounting base 13. The plate body 1961 is provided with a hole 19610, and the mounting base 13 (more specifically, the lower casing 1302) is provided with a hole 13010. The mounting base 13 and the support frame 19 can be connected to each other by fasteners extending through the hole 19610 and the hole 13010. The arm body 1962 has a hole 19620. The second transverse rod 193 located between the two longitudinal rods 191 extends through the hole 19620. The second transverse rod 193 is closer to the abutting portion 12 than the first transverse rod 192. In some embodiments, the hole 19620 is a non-circular hole, so that the arm body 1962 is non-rotatably sleeved on the second transverse rod 193. In some embodiments, the front surface of the base housing 10 may also be provided with a guide groove 106. The guide groove 106 may be in communication with the second opening 110 and slidably cooperates with the arm body 1962.

[0089] Referring to FIGS. 11 and 16, in some embodiments, a handle 136 may be disposed on the front side of the mounting base 13. By operating the handle 136, the support frame 19 may be pushed to slide relative to the base housing 10. In some embodiments, the handle 136 protrudes outward from the front side of the mounting base 13.

[0090] Referring to FIGS. 16 to 18, the sliding position of the support frame 19 relative to the base housing 10 can be locked by a first locking mechanism 131. FIGS. 16 to 18 illustrate an exemplary structure of the first locking mechanism 131. The first locking mechanism 131 is mounted to the mounting base 13. The upper casing 1301 is omitted in the mounting base 13 shown in FIG. 16 to facilitate illustrating the structure of the first locking mechanism 131.

[0091] The first locking mechanism 131 includes an axially movable first locking member 1311. The base housing 10 (more specifically, the base portion 11) is provided with a plurality of first locking holes 1310. The plurality of first locking holes 1310 are spaced apart in a sliding direction of the support frame 19. The first locking member 1311 is selectively connected to one of the plurality of first locking holes 1310, so as to lock the support frame 19 at different sliding positions, and thus locking the seat body 2 at different tilt angles relative to the base 1. Referring to FIG. 13, the plurality of first locking holes 1310 can be disposed on the sliding track 101 of the support frame 19. More specifically, the plurality of first locking holes 1310 are disposed on the sliding track 101 of the first rod segment 1911 of each longitudinal rod 191.

[0092] Referring to FIGS. 7, 8 and 17, in some embodiments, the first locking holes 1310 are disposed in the lower housing 1012. Each first locking hole 1310 is at an angle to a horizontal plane. Referring to FIG. 16, the first locking mechanism 131 further includes a first unlocking member 1312. The first unlocking member 1312 can be mounted on the front side of the mounting base 13. More specifically, the handle 136 can be connected to the mounting base 13 by a fastener (not shown) extending through the hole 13011 of the mounting base 13. The first unlocking member 1312 may be mounted on the handle 136. The first unlocking member 1312 is connected to the first locking member 1311 by a first traction rope 1313 (shown in dotted lines in FIG. 16). A first end of the first locking member 1311 is located inside the mounting base 13 and abuts against the first reset spring 1314. The first reset spring 1314 is configured to push the first locking member 1311 so that a second end of the first locking member 1311 is engaged with the corresponding first locking hole 1310.

[0093] As shown in FIG. 16, the first unlocking member 1312 is disposed on the handle 136, and the handle 136 is disposed on the front side of the mounting base 13. As can be seen from the above, when the seat body 2 rotates forward or backward, the mounting base 13 does not rotate with the seat body 2, and the handle 136 always faces forward. In this way, even when the seat body 2 is switched to the forward-facing position or the rearward-facing position, the tilt angle of the seat body 2 relative to the base 1 can be conveniently adjusted. As such, it is possible to avoid the problem in the related art that the operation of adjusting the tilt angle of the seat body relative to the base is difficult to implement due to the small operating space for the first unlocking member because of the front side of the seat body being adjacent to or abutting against the abutting portion when the seat body rotates to the rearward-facing position in the case where the first unlocking member is disposed below the front side of the seat body.

[0094] Referring to FIGS. 17 and 18, when the sliding position of the support frame 19 needs to be adjusted, the first unlocking member 1312 is pressed while holding the handle 136, then the first unlocking member 1312 pulls the first locking member 1311 via the first traction rope 1313, and the second end of the first locking member 1311 is withdrawn from the first locking hole 1310. Then, the handle 136 is pulled or pushed to adjust the seat body 2 to a suitable tilt angle, and the first unlocking member 1312 is released, so that the first locking member 1311 is engaged with the corresponding first locking hole 1310 under the pushing of the first reset spring 1314, and the seat body 2 is locked at the adjusted tilt angle.

[0095] As can be seen from FIGS. 16 to 18, in some embodiments, a guide wheel 1103 may be provided in the mounting base 13. The guide wheel 1103 is adjacent to the first locking member 1311. The first traction rope 1313 is connected to the first locking member 1311 after being passed around the guide wheel 1103.

[0096] In some embodiments, the longitudinal rod 191 of the support frame 19 is provided with a guide hole 190. The first locking member 1311 slidably cooperates with the guide hole 190.

[0097] Referring to FIGS. 19 and 20, the seat body 2 includes a seat portion 21 and a backrest part 22 extending upward from the seat portion 21. A headrest 23 may be mounted on the backrest part 22. The seat portion 21 may be rotatably mounted on the mounting base 13, so that the seat body 2 can pivot relative to the base 1, and thus have a plurality of working positions. For ease of understanding, the base housing 10 of the base 1 is omitted in FIGS. 19 and 20.

[0098] Referring again to FIGS. 4 and 6, in some embodiments, the seat portion 21 may be rotatably connected to the mounting base 13. In some embodiments, the seat portion 21 includes, for example, a rotary shaft 210. The mounting base 13 has a central hole 130 (which is also referred to as the stepped pivot hole as above). The central hole 130 may be defined by upper casing 1301 and the lower casing 1302. The rotary shaft 210 is pivotally received in the central hole 130.

[0099] Still referring to FIG. 6, in some embodiments, the axial limiting mechanism 6 as described above may be mounted on the seat portion 21. In some embodiments, the axial limiting mechanism 6 may include a sleeve part 6a and a limiting flange 6b. The sleeve part 6a may be sleeved on the rotary shaft 210 and pivotally received in the central hole 130. The limiting flange 6b is located below the two first transverse rods 192 and may abut against the two first transverse rods 192.

[0100] Referring again to FIGS. 2 and 3, in some embodiments, the child safety seat 1000 may further include at least one limiting structure 3. The seat body 2 and the support frame 19 may be connected by the at least one limiting structure 3. The limiting structure 3 is configured to apply a pulling force to the seat body 2 to prevent the seat body 2 from tipping forward relative to the base 1 and possibly injuring the child when the vehicle brakes unexpectedly.

[0101] Referring to FIG. 2, in some embodiments, the limiting structure 3 further includes an upper limiting structure 32. When the seat body 2 is in the forward-facing position and the vehicle brakes suddenly, the backrest part 22 of the seat body 2 is engaged with the support frame 19 by the upper limiting structure 31. The upper limiting structure 31 can hold the backrest part 22 of the seat body 2, which can effectively prevent the seat body 2 from tipping forward relative to the base 1.

[0102] Still referring to FIG. 2, in some embodiments, the upper limiting structure 32 includes a first upper limiting member 311 and a second upper limiting member 312. As described above, the first upper limiting member 311 may be disposed at the upper end of the support frame 19 extending out of the abutting portion 12. Referring to FIG. 11, the second upper limiting member 312 can be disposed on the back surface of the backrest part 22. When the seat body 2 is in the forward-facing position, the first upper limiting member 311 and the second upper limiting member 312 cooperate with each other, for example, may be in clearance fit with each other. It should be noted that when the seat body 2 is in the forward-facing position, the first upper limiting member 311 and the second upper limiting member 312 may not always be in contact with each other, as long as the first upper limiting member 311 and the second upper limiting member 312 may be in contact with each other only when the seat body 2 is tilted forward relative to the base 1 so as to apply a backward pulling force to the backrest part 22 of the seat body 2.

[0103] Still referring to FIG. 2, in some embodiments, the first upper limiting member 311 and the second upper limiting member 312 may each have a hook-shaped cross section, and may be hooked to each other. In some embodiments, the first upper limiting member 311 and the second upper limiting member 312 may both extend along an arc, so that the first upper limiting member 311 and the second upper limiting member 312 have sufficient contact area therebetween, and may not interfere with the rotation of the seat body 2 relative to the base 1. In other embodiments, the first upper limiting member 311 and the second upper limiting member 312 may also be implemented in other ways and are not limited to the above examples.

[0104] Referring to FIGS. 19 and 21, in some embodiments, the child safety seat 1000 may further include a top tether 4. A first end 41 of the top tether 4 is connected to a suitable structure of the base 1, and a second end 42 of the top tether 4 may be provided with an anchor 43. The anchor 43 is configured, for example, to be connected to an anchor point on the rear side of the seat back of the vehicle seat 900. In some embodiments, the first end 41 of the top tether 4 may extend into the interior of the base housing 10 and be fixed. More specifically, the first end 41 of the top tether 4 may be connected to a fixing member 114. In some embodiments, the fixing member 114 may be, but is not limited to, fixed to the support frame 19. The top tether 4 may further be provided with an adjuster 45. The adjuster 45 is configured to adjust the length of the top tether 4.

[0105] Referring to FIGS. 15 and 21, in some embodiments, a support ring 315 is disposed on the first upper limiting member 311, and the second end 42 of the top tether 4 may pass through the support ring 315 when extending upward. That is, the middle part of the top tether 4 is passed around the support ring 315. When the vehicle brakes suddenly, the first upper limiting member 311 may tighten the second upper limiting member 312 while the first upper limiting member 311 may also be tightened by the top tether 4. In this way, the force generated due to the seat body 2 tilting forward can be transmitted to the vehicle seat 900 through the upper limiting structure 31 and the top tether 4. In addition, the first upper limiting member 311 is subjected to two opposite pulling forces simultaneously. The two opposite pulling forces can cancel each other, which can effectively avoid damage to the first upper limiting member 311.

[0106] In some embodiments, the first upper limiting member 311 may include a plate 3111 and a hook body 3112 extending forward from an upper end of the plate 3111. The support ring 315 may protrude from a rear side of the plate 3111.

[0107] Referring to FIG. 3, in some embodiments, the limiting structure 3 may further include a lower limiting structure 32. When the seat body 2 is in the rearward-facing position and the vehicle brakes suddenly, the seat portion 21 of the seat body 2 is engaged with the support frame 19 by the lower limiting structure 32. The lower limiting structure 32 can hold the seat portion 21 of the child seat, which can effectively prevent the seat body 2 from tipping forward relative to the base 1.

[0108] Still referring to FIG. 3, in some embodiments, the lower limiting structure 32 includes a first lower limiting member 321 and a second lower limiting member 322. The first lower limiting member 321 can extend from the support frame 19 towards the seat portion 21. The first lower limiting member 321 extends through the mounting base 13. The second lower limiting member 322 can protrude from the back surface of the seat portion 21. For example, the second lower limiting member 322 is located at the front side of the back surface of the seat portion 21. When the seat body 2 is in the rearward-facing position, the first lower limiting member 321 and the second lower limiting member 322 cooperate with each other, for example, may be in clearance fit with each other. It should be noted that when the seat body 2 is in the rearward-facing position, the first lower limiting member 321 and the second lower limiting member 322 may not always be in contact with each other, as long as the first lower limiting member 321 and the second lower limiting member 322 may be in contact with each other only when the seat body 2 is tilted forward relative to the base 1 so as to apply a backward pulling force to the seat portion 21 of the seat body 2.

[0109] Referring to FIG. 4, in some embodiments, at least one of the first lower limiting member 321 and the second lower limiting member 322 has a hook-shaped cross section, and may be hooked to each other. In some embodiments, the first lower limiting member 321, for example, includes one, two or more hook-shaped members extending upward from the fixing base 196; and the second lower limiting member 322 can extend along an arc and have a hookshaped cross section. The implementation of the first lower limiting member 321 and the second lower limiting member 322 is not limited to the above examples.

[0110] Referring to FIGS. 21 and 22, the rotation position of the seat body 2 relative to the mounting base 13 can be locked by a second locking mechanism 213. FIGS. 21 and 22 illustrate an exemplary structure of the second locking mechanism 213. The second locking mechanism 213 is mounted on the seat portion 21 of the seat body 2. Part of the housing of the seat body 2 is omitted in FIG. 22 to facilitate the illustration of the structure of the second locking mechanism 213.

[0111] Referring to FIG. 21, the second locking mechanism 213 includes an axially movable second locking member 2131. The mounting base 13 is provided with a plurality of second locking holes 2130 at positions corresponding to the second locking member 2131. The plurality of second locking holes 2130 are spaced apart in the rotation direction of the seat body 2. The second locking member 2131 is selectively connected to one of the plurality of second locking holes 2130, so as to lock the seat body 2 at different working positions.

[0112] Referring to FIGS. 1, 21 and 22, the second locking mechanism 213 further includes a second unlocking member 2132. The second unlocking member 2132 can be mounted at the armrests on both sides of the seat portion 21. The second unlocking member 2132 is connected to the second locking member 2131 by a second traction rope 2133 (shown by a dotted line in FIG. 21). A first end of the second locking member 2131 is located inside the seat portion 21 and abuts against a second reset spring 2134. The second reset spring 2134 is configured to push the second locking member 2131 so that the second end of the second locking member 2131 is engaged with the corresponding second locking hole 2130.

[0113] When the facing direction of the seat body 2 needs to be adjusted, the second unlocking member 2132 is pressed, and the second unlocking member 2132 pulls the second locking member 2131 by the second traction rope 2133, then the second end of the second locking member 2131 is withdrawn from the second locking hole 2130, and then the seat body 2 can be rotated. When the seat body 2 is rotated to a suitable facing direction, the second unlocking member 2132 is released, and the second locking member 2131 is engaged with the corresponding second locking hole 2130 under the pushing of the second reset spring 2134.

[0114] According to the child safety seat 1000 of the first embodiment of the present application, the support frame 19 is connected to the mounting base 13, and the seat body 2 is mounted on the mounting base 13, so that the seat body 2, the mounting base 13 and the support frame 19 can move synchronously. When the tilt angle of the seat body 2 in the forward-facing position relative to the base 1 needs to be adjusted, the first upper limiting member 311 and the second upper limiting member 312 of the upper limiting structure 31 can move synchronously and can be always connected together. Similarly, when the tilt angle of the seat body 2 in the rearward-facing position relative to the base 1 needs to be adjusted, the first lower limiting member 321 and the second lower limiting member 322 of the lower limiting structure 32 can move synchronously and can be always connected together.

[0115] In addition, in some unillustrated embodiments, for example, the child safety seat 1000 according to the first embodiment of the present application may be modified as follows.

[0116] 1. In some embodiments, the seat body 2 may be not rotatable relative to the base 1, that is, the seat body 2 has only one of the forward-facing position and the rearward-facing position. Accordingly, the child safety seat can be configured with only one of the first upper limiting member 321 and the second lower limiting member 322.

[0117] 2. In some embodiments, the mounting base 13 of the child safety seat 1000 may be omitted, and in this case, the seat portion 21 of the seat body 2 is directly fixedly connected to the support frame 19 of the base 1.

[0118] 3. In some embodiments, the mounting base 13 can be connected to a rotatable platform through a rotating mechanism, and the seat body 2 can be detachably connected to the rotatable platform. For example, the seat portion 21 of the seat body 2 can be detachably engaged with the rotatable platform. It can be understood that the seat body 2 can rotate to the forward-facing position, the rearward-facing position, etc. along with the rotatable platform.

[0119] Second embodiment

[0120] Referring to FIG. 23, a child safety seat 1000 according to a second embodiment of the present application is shown. FIG. 24 and FIG. 25 are side views of the child safety seat 1000 in different working states. The child safety seat 1000 includes a base 1 and a seat body 2. The base 1 is configured to be mounted on a vehicle seat. The seat body 2 may be mounted on the base 1 in a detachable manner or a non-detachable manner. The seat body 2 is suitable for a child to sit on.

[0121] The orientation of the seat body 2 and the orientation of the base 1 in this embodiment can refer to the definition in the first embodiment, and will not be repeatedly described herein. The structures of the base 1 and the seat body 2 will be described in detail below.

[0122] Referring to FIGS. 26 to 29, the base 1 includes a base housing 10 and a support frame 19. The base housing 10 includes a base portion 11 and an abutting portion 12 extending upward from the base portion 11. The base portion 11 is configured to be placed on the seat surface of the vehicle seat. The abutting portion 12 is configured to abut against the seat back of the vehicle seat. In some embodiments, the base housing 10 may include a plurality of hard housings enclosing the outer contour of the base housing 10. The plurality of hard housings define the internal space of the base housing 10. Referring to FIG. 27, the plurality of hard housings, for example, includes: an upper housing 1011 and a lower housing 1012 that generally correspond to the base portion 11; and a front housing 1021 and a rear housing 1022 that generally correspond to the abutting portion 12. The upper housing 1011 and the front housing 1021 correspond to the front side of the base housing 10, and the lower housing 1012 and the rear housing 1022 correspond to the rear side of the base housing 10. In other embodiments, the base housing 10 may also have other implementations.

[0123] Referring to FIG. 27, in some embodiments, a mounting base 13 is mounted on the front surface of the base portion 11. Unlike the first embodiment, the mounting base 13 in the second embodiment may not slide forward and backward relative to the base housing 10. The seat portion 21 of the seat body 2 is mounted on the mounting base 13.

[0124] In some embodiments, the mounting base 13 is detachably connected to the seat portion 21 of the seat body 2, and the mounting base 13 itself is non-rotatable. In some embodiments, the seat body 2 can have a plurality of working positions by changing the mounting direction of the seat body 2 on the mounting base 13. The plurality of working positions includes, for example, a forward-facing position and a rearward-facing position.

[0125] In some embodiments, the mounting base 13 may be pivotally connected to the base portion 11 via any suitable rotating mechanism (not shown). In this way, the seat body 2 may have a plurality of working positions as the mounting base 13 rotates. The plurality of working positions includes at least two of the forward-facing position, the rearward-facing position, and a sideward-facing position.

[0126] In some embodiments, the rotation position of the mounting base 13 relative to the base 1 can be locked by a fourth locking mechanism. In some embodiments, the fourth locking mechanism is, for example, mounted inside the mounting base 13. The fourth locking mechanism may include a fourth unlocking member 134, an axially movable fourth locking member (not shown), a fourth reset spring (not shown) abutting against the fourth locking member, and a fourth traction rope (not shown) connected between the fourth unlocking member 134 and the fourth locking member. The base housing 10 is provided with a plurality of fourth locking holes (not shown). The fourth locking member is selectively connected to one of the plurality of fourth locking holes under the drive of the fourth reset spring to lock the seat body 2 on the mounting base 13 at different working positions. When the fourth unlocking member 134 is subjected to a pressing force, the fourth traction rope pulls the fourth locking member out of the fourth locking hole, and then the seat body 2 may be mounted. When the seat body 2 rotates to a suitable direction, the fourth unlocking member 134 is released, and then the fourth locking member is engaged with the corresponding fourth locking hole under the pushing of the fourth reset spring.

[0127] FIG. 26 and FIG. 27 show an exemplary structure of the seat body 2 that is detachably mounted on the mounting base 13. The mounting base 13 is provided with an engaging mechanism 137. An engaging rod 27 (see FIG. 32) is provided at the bottom of the seat body 2. The engaging mechanism 137 is configured to be detachably engaged with the engaging rod 27. In some embodiments, the engaging mechanism 137 includes a plurality of engaging grooves 1370 disposed on the mounting base 13 and a plurality of engaging hooks 1371 engageable with the plurality of engaging grooves 1370. The engaging rod 27 of the seat body 2 may be inserted into the engaging grooves 1370 and locked by the engaging hooks 1371. The engaging mechanism 137 may further include an unlocking member 1372. The unlocking member 1372 is operably connected to each of the engaging hooks 1371, and is configured to drive the engaging hooks 1371 to unlock the engaging rod 27. In some embodiments, a display device 1373 is disposed on the mounting base 13. The display device 1373 is configured to display whether the engaging rod 27 is locked by the locking hooks 1371.

[0128] Referring to FIG. 27, a clamping groove 1201 and a belt clamper 129 is disposed on the front surface of the base housing 10. The belt clamper 129 may be locked in the clamping groove 1201 by a third locking mechanism 215, so that a passage (see the relevant description of the first embodiment as above) configured to clamp a vehicle safety belt between the wall of the clamping groove 1201 and the belt clamper 129 is formed.

[0129] The upper housing 1011 and the front housing 1021 of the base casing 10 are omitted in FIGS. 28 and 29 to facilitate the illustration of the internal configuration of the base casing 10. In some embodiments, a first end of the belt clamper 129 is pivotally connected to the base casing 10 via a shaft 125. The third locking mechanism 215 is disposed at a second end of the belt clamper 129. The third locking mechanism 215 is configured to lock the relative position between the second end of the belt clamper 129 and the base housing 10, thereby locking the belt clamper 129 in the clamping groove 1201.

[0130] Referring to FIG. 28, in some embodiments, the third locking mechanism 215 may include an axially movable third locking member 2151. A locking member 105 corresponding to the third locking member 2151 may further be mounted on the base casing 10. The locking member 105 is formed with a third locking hole 1050. The third locking member 2151 can be inserted into the third locking hole 1050 or withdrawn from the third locking hole 1050. When the third locking member 2151 withdraws from the third locking hole 1050, the belt clamper 129 can pivot around the shaft 125 to open the clamping groove 1201. When the third locking member 2151 is inserted into the third locking hole 1050, the belt clamper 129 is locked in the clamping groove 1201. In some embodiments, an operating hole 1290 is disposed on a surface of the belt clamper 129; and a third unlocking member 2152 connected to the third locking member 2151 corresponds to the operating hole 1290. The user can operate the third unlocking member 2152 through the operating hole 1290, so as to drive the third locking member 2151 to withdraw from the third locking hole 1050.

[0131] Referring to FIGS. 28 and 29, the support frame 19 is mounted inside the base housing 10. Different from the first embodiment as described above, the support frame 19 in the second embodiment is connected to the base housing 10, for example, by fasteners, and the support frame 19 may not slide relative to the base housing 10. In some embodiments, the support frame 19 mainly serves to strengthen the structural strength of the base housing 10. In some embodiments, the support frame 19 may include two longitudinal rods 191. The two longitudinal rods 191 may be connected to each other by any suitable structure. In some embodiments, the top ends of the two longitudinal rods 191 may be connected by a U-shaped rod 197. A first upper limiting member 311 may be connected to the U-shaped rod 197 and protrude forward from the top of the abutting portion 12.

[0132] In some embodiments, each longitudinal rod 191 of the support frame 19 may be provided with a reinforcing bracket 1917. The reinforcing bracket 1917 is configured to strengthen the structural strength of the bend portion of each longitudinal rod 191. In some embodiments, at least one transverse rod 1922 may be provided between the two longitudinal rods 191 of the support frame 19.

[0133] Referring to FIG. 30, in some embodiments, the child safety seat 1000 may further include a top tether 4. A first end 41 of the top tether 4 is connected to the base 1, and a second end 42 of the top tether 4 may be provided with an anchor 43. The anchor 43 is, for example, configured to be connected to an anchor point on the rear side of a seat back of a vehicle seat.

[0134] The upper housing, the front housing, and the rear housing of the base housing 10 are omitted in FIG. 30, to facilitate illustrating the exemplary connection structure between the top tether 4 and the base 1. The first end 41 of the top tether 4 can extend into the interior of the base housing 10 and be connected to a fixing member 114. The fixing member 114 can be fixed to the support frame 19, for example. More specifically, the fixing member 114, together with the first upper limiting member 311, is fixed to the U-shaped rod 197 by fasteners at the same time, for example.

[0135] In some embodiments, a support ring 315 is disposed on the first upper limiting member 311. The second end 42 of the top tether 4 passes through the support ring 315 when extending upward. That is, the middle part of the top tether 4 is passed around the support ring 315. When the vehicle brakes suddenly, the first upper limiting member 311 is tightened by the top tether 4 while tightening the second upper limiting member 312. In this way, the force generated due to the seat body 2 tipping forward can be transmitted to the vehicle seat through an upper limiting structure 31 including the first upper limiting member 311, and the top tether 4. In addition, the first upper limiting member 311 is simultaneously subjected to two opposite pulling forces. The two opposite pulling forces can cancel each other, which can effectively avoid damage to the first upper limiting member 311.

[0136] In some embodiments, the first upper limiting member 311 includes a plate 3111 and a hook body 3112 extending forward from an upper end of the plate 3111. The support ring 315 may protrude from a rear side of the plate 3111.

[0137] Referring to FIGS. 31 and 32, the seat body 2 includes a seat portion 21 and a backrest part 22 extending upward from the seat portion 21. A headrest 23 can be mounted on the backrest part 22. A housing of the seat body 2 may include a body housing 201 and a bottom housing 202 mounted on the back side of the body housing. The body housing 201 forms a space for a child to sit on. In some embodiments, the body housing 201 and the bottom housing 202 both have a portion corresponding to the seat portion 21, or the body housing 201 and the bottom housing 202 both have portions respectively corresponding to the seat portion 21 and the backrest part 22.

[0138] Referring to FIG. 32, a plurality of engaging rods 27 are disposed on the bottom housing 202. The plurality of engaging rods 27 are configured to be detachably connected to the engaging structure 137 of the mounting base 13. The body housing 201 can be slidably mounted to the bottom housing 202, so that the tilt angle of the body housing 201 relative to the bottom housing 202 can be adjusted.

[0139] Exemplary structures of the body housing 201 and the bottom housing 202 are shown in FIGS. 33 to 35. In some embodiments, the body housing 201 is provided with a plurality of elongated holes 2010, and the bottom housing 202 is provided with a plurality of sliding rods 2021. The plurality of sliding rods 2021 slidably cooperate with the plurality of elongated holes 2010.

[0140] As shown in FIGS. 33 to 35, three sliding rods 2021 are mounted on the bottom housing 202. The three sliding rods 2021 may include a front sliding rod 20211, a middle sliding rod 20212, and a rear sliding rod 20213. The body housing 201 is respectively provided with elongated holes 2010 at the positions corresponding to two ends of each sliding rod 20213. In some embodiments, the middle sliding rod 20212 is sleeved in the engaging rod 27.

[0141] Referring to FIGS. 33 and 35, the sliding position of the body housing 201 relative to the bottom housing 202 can be locked by a fifth locking mechanism 235. An exemplary structure of the fifth locking mechanism 235 is shown in FIGS. 33 and 35. The fifth locking mechanism 235 may include an axially movable fifth locking member 2351, a fifth unlocking member 2352, a fifth traction rope 2353 connected between the fifth locking member 2351 and the fifth unlocking member 2352, and a fifth reset member 2354 configured to drive the fifth locking member 2351 to reset. The fifth locking member 2351 may be mounted on a mounting frame 2025 fixed to the bottom housing 202. The fifth reset member 2354 may abut against the fifth locking member 2351. The fifth unlocking member 2352 may be mounted on the front side of the bottom housing 202, for example. The body housing 201 may be provided with a plurality of fifth locking holes 2350. The fifth locking member 1311 is selectively connected to one of the plurality of fifth locking holes 2350, so as to lock the body housing 201 at different sliding positions to meet the sitting needs of the child.

[0142] Referring again to FIGS. 24 and 25, in some embodiments, the child safety seat 1000 further includes at least one limiting structure 3. The seat body 2 and the base 1 are connected to each other by at least one limiting structure 3. The limiting structure 3 is configured to apply a pulling force to the seat body 2 to prevent the possible danger caused by the seat body 2 tipping forward relative to the base 1 when the vehicle brakes unexpectedly.

[0143] Referring to FIG. 24, in some embodiments, the limiting structure 3 includes the upper limiting structure 31. When the seat body 2 is in the forward-facing position and the vehicle suddenly brakes, the upper end of the bottom housing 202 of the seat body 2 is engaged with the base 1 by the upper limiting structure 31, and the upper limiting structure 31 can hold the backrest part 22 of the seat body 2, which can effectively prevent the seat body 2 from tipping forward relative to the base 1.

[0144] Still referring to FIG. 24, in some embodiments, the upper limiting structure 31 includes the first upper limiting member 311 and a second upper limiting member 312. The first upper limiting member 311 is located at the top of the abutting portion 12. In some embodiments, as described above, the first upper limiting member 311 can be disposed at the upper end of the U-shaped rod 197 of the support frame 19, and protrude forward relative to the abutting portion 12. In conjunction with reference to FIG. 34, the second upper limiting member 312 can be disposed at the top of the bottom housing 202. When the seat body 2 is in the forward-facing position, the first upper limiting member 311 and the second upper limiting member 312 cooperate with each other, for example, may be in clearance fit. It should be noted that when the seat body 2 is in the forward-facing position, the first upper limiting member 311 and the second upper limiting member 312 may not always be in contact with each other, as long as the first upper limiting member 311 and the second upper limiting member 312 may be in contact with each other only when the seat body 2 is tilted forward relative to the base 1 so as to apply a backward pulling force to the backrest part 22 of the seat body 2.

[0145] Still referring to FIG. 24, in some embodiments, the first upper limiting member 311 and the second upper limiting member 312 may each have a hook-shaped cross section, and be hooked to each other. In some embodiments, the first upper limiting member 311 and the second upper limiting member 312 may both extend along an arc, so that the first upper limiting member 311 and the second upper limiting member 312 may have sufficient contact area therebetween, and may not interfere with the rotation of the seat body 2 relative to the base 1. In other embodiments, the first upper limiting member 311 and the second upper limiting member 312 may also be implemented in other ways and are not limited to the above examples.

[0146] Referring to FIGS. 34 and 35, in some embodiments, the second upper limiting member 312 is connected to the sliding rod 20213, for example, via an intermediate member 313.

[0147] Referring to FIG. 25, in some embodiments, the limiting structure 3 includes a lower limiting structure 32. When the seat body 2 is in the rearward-facing position and the vehicle suddenly brakes, the front end of the bottom housing 202 of the seat body 2 is engaged with the base 1 by the lower limiting structure 32, and the lower limiting structure 32 can hold the seat portion 21 of the child seat, which can effectively prevent the seat body 2 from tipping forward relative to the base 1.

[0148] Still referring to FIG. 25, in some embodiments, the lower limiting structure 32 includes a first lower limiting member 321 and a second lower limiting member 322. The first lower limiting member 321 extends from the base 1 towards the seat portion 21. The second lower limiting member 322 is disposed at the front end of the bottom housing 202. When the seat body 2 is in the rearward-facing position, the first lower limiting member 321 and the second lower limiting member 322 cooperate with each other, for example, may be in clearance fit. It should be noted that when the seat body 2 is in the rearward-facing position, the first lower limiting member 321 and the second lower limiting member 322 may not always be in contact with each other, as long as the first lower limiting member 321 and the second lower limiting member 322 may be in contact with each other only when the seat body 2 is tilted forward relative to the base 1 so as to apply a backward pulling force to the seat portion 21 of the seat body 2.

[0149] Still referring to FIG. 25, in some embodiments, at least one of the first lower limiting member 321 and the second lower limiting member 322 has a hook-shaped cross section, and are hooked to each other. Referring to FIG. 29, in some embodiments, the first lower limiting member 321, for example, includes one, two or more hook-shaped members connected to the support frame 19. Referring to FIGS. 34 and 35, the second lower limiting member 322, for example, includes one, two or more fixing rings protruding from the bottom housing 202. Certainly, the implementations of the first lower limiting member 321 and the second lower limiting member 322 are not limited to the above examples. In some embodiments, each fixing ring of the second lower limiting member 322 can be connected to the sliding rod 20211 and / or the engaging rod 27 by an intermediate member 324, for example.

[0150] According to the child safety seat 1000 of the present application, when the tilt angle of the body housing 201 needs to be changed, the bottom housing 202 does not move relative to the base 1, which may not hinder the cooperation between the second upper limiting member 312 of the bottom housing 202 and the first upper limiting member 311 of the base 1, and the cooperation between the second lower limiting member 322 of the bottom housing 202 and the first lower limiting member 321 of the base 1.

[0151] 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 5 contradiction in the combination of these technical features, the combinations should be considered as falling in the scope of the present disclosure.

[0152] The above-described embodiments only illustrate several implementations of the present disclosure, and the descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present disclosure. It should be understood by those 10 of ordinary skill in the art that various modifications and improvements can be made without departing from the concept of the present disclosure, and all fall within the protection scope of the present disclosure. Therefore, the patent protection of the present disclosure shall be subject to the appended claims.

Claims

1. A child safety seat, comprising:a base including a base housing and a support frame accommodated in the base housing;a seat body mounted on the base and having a forward-facing position and a rearwardfacing position relative to the base; andat least one limiting structure disposed between the seat body and the support frame,wherein the base housing is provided with an opening through which the limiting structure extends, and the at least one limiting structure includes an upper limiting structure and a lower limiting structure; wherein the upper limiting structure includes a first upper limiting member disposed at an upper end of the support frame and exposed from the opening, and a second upper limiting member disposed at a back surface of the seat body;when the seat body is in the forward-facing position, the seat body is engaged with the support frame by the upper limiting structure, and the lower limiting structure is in a disengaged state; when the seat body is in the rearward-facing position, the seat body is engaged with the support frame by the lower limiting structure, and the upper limiting structure is in a disengaged state.

2. The child safety seat according to claim 1, further comprising a top tether, wherein a first end of the top tether is connected to the first upper limiting member, and a second end of the top tether is provided with an anchor configured to be connected to a vehicle.

3. The child safety seat according to claim 2, wherein the first upper limiting member is provided with a support ring, the first end of the top tether is connected to the support frameand is passed around the support ring.

4. The child safety seat according to claim 1 or 2, further comprising a mounting base, wherein the seat body is mounted on the support frame by the mounting base, the support frame is configured to operably slide relative to the base housing, so as to change a tilt angle of the seat body relative to the base housing;wherein the opening includes a first opening disposed at a top of the base housing, the upper end of the support frame extends out of the first opening to enable the first upper limiting member to be exposed from the base housing;when the support frame slides relative to the base housing, the first upper limiting member remains connected to the second upper limiting member.

5. The child safety seat according to claim 4, wherein the seat body has a rotary shaft, and the seat body is pivotally connected to the mounting base by the rotary shaft to rotate between the forward-facing position and the rearward-facing position,the lower limiting structure includes a first lower limiting member and a second lower limiting member, wherein the first lower limiting member extends from the support frame and through the mounting base towards the seat body, and the second lower limiting member protrudes from a front side of the seat body; and when the seat body is in the rearward-facing position relative to the base, the first lower limiting member cooperates with the second lower limiting member.

6. The child safety seat according to claim 4, wherein the base housing is provided with a sliding track therein, and the support frame slidably cooperates with the sliding track;the sliding track is provided with a plurality of first locking holes; the support frame is provided with a first locking mechanism including a first locking member, wherein the first locking member is selectively engaged with one of the plurality of first locking holes to position the support frame at different positions of the sliding track.

7. The child safety seat according to claim 6, further comprising:the first locking mechanism configured to lock a sliding between the support frame and the base housing, the first locking mechanism including:the first locking member disposed in the mounting base and slidably cooperating with a guide hole of the support frame;the plurality of first locking holes disposed on the base housing; anda reset spring disposed between the mounting base and the first locking member and configured to push the first locking member to be engaged with the one of the first locking holes;wherein the first locking member extends through the guide hole and is selectively connected to the one of the plurality of first locking holes, to position the support frame at the different positions of the base housing.

8. The child safety seat according to claim 7, wherein the first locking mechanism further includes:a first unlocking member disposed at a handle disposed at a front end of the mounting base; anda first traction rope having one end connected to the first unlocking member and anotherend connected to the first locking member;wherein the first unlocking member drives the first locking member to be withdrawn from the corresponding one of the first locking holes by the first traction rope.

9. The child safety seat according to claim 5, further comprising:a second locking mechanism configured to lock a pivoting between the seat body and the mounting base, the second locking mechanism being located between the seat body and the mounting base, and the second locking mechanism including:a second locking member disposed on the seat body and capable of moving axially relative to the seat body; anda plurality of second locking holes spaced apart on the mounting base;wherein the second locking member is selectively connected to one of the plurality of second locking holes, so as to lock the seat body in the forward-facing position or the rearwardfacing position.

10. The child safety seat according to any one of claims 4 to 9, wherein the base housing includes a base portion and an abutting portion extending upwardly from the base portion, and the abutting portion being configured to abut against a seat back of a vehicle seat;wherein the seat body is mounted on the base portion by the mounting base and is pivotable back and forth, the first opening is disposed at a top of the abutting portion, the abutting portion is provided with a clamping groove and a belt clamper, wherein a first end of the belt clamper is pivotally connected to the base housing, a second end of the belt clamper is provided with a third locking mechanism, and the belt clamper is locked in the clamping grooveby the third locking mechanism, so as to clamp a vehicle seat belt at the abutting portion.

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