Child safety seat

Abstract

This application provides a child safety seat, comprising: a base, including a base housing and a support frame housed within the base housing; a seat body, mounted on the base and having a forward position and a rearward position relative to the base; and at least one limiting structure disposed between the seat body and the support frame. The base housing has an opening for the limiting structure to pass through, and 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 disposed at the upper end of the support frame and exposed outside the opening; and a second upper limiting member disposed on the back of the seat body; when the seat body is in the forward position, the seat body and the support frame are engaged by the upper limiting structure, and the lower limiting structure is in a disengaged state.

Description

Technical Field

[0001] The present application relates to a child safety seat and a base thereof. Prior Art

[0002] Child safety seats can be installed on vehicle seats to accommodate children, effectively ensuring their safety. A typical child safety seat consists of a base and a child seat. The child seat can be installed on the base in either a forward-facing or rear-facing manner, creating a space for the child. The child seat's tilt angle relative to the base can be adjusted to provide comfortable and safe support for children in either a sitting or reclining position. A simple solution for adjusting the tilt angle of a child seat is urgently needed. Summary of the Invention

[0003] In one aspect, the present application provides a child safety seat, comprising: a base, including a base shell and a support frame accommodated in the base shell, the base shell including a base and an abutment portion extending upward from the base, the base being used to abut against a seat surface of a vehicle seat, and the abutment portion being used to abut against a backrest of the vehicle seat; a seat body, including a seat portion and a backrest portion 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 being adapted to be engaged with each other through the at least one limiting structure to prevent the seat body from tipping forward relative to the base.

[0004] In one embodiment of the present application, the seat body has a forward position and a rearward 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 position, the backrest and the support frame are engaged through the upper limiting structure, and the lower limiting structure is in a separated state; when the seat body is in the rearward position, the seat and the support frame are engaged through the lower limiting structure, and the upper limiting structure is in a separated state.

[0005] In one embodiment of the present application, a first opening is provided at the top of the abutment portion, and the upper end of the support frame extends from the first opening; the at least one limiting structure includes an upper limiting structure, and the upper limiting structure includes a first upper limiting member and a second upper limiting member, the first upper limiting member is arranged at the upper end of the support frame, and the second upper limiting member is arranged on the back of the backrest portion; when the seat body is in a forward position relative to the base, the first upper limiting member and the second upper limiting member cooperate with each other, and the cross-section of at least one of the first upper limiting member and the second upper limiting member is hook-shaped.

[0006] In one embodiment of the present application, the first upper limit member is provided with a support ring; the child safety seat further comprises a top strap, a first end of the top strap is connected to the base, and a second end of the top strap extends upward so that the middle portion of the top strap is passed through the support ring.

[0007] In one embodiment of the present application, the child safety seat also includes a mounting seat, which is non-rotatably connected to the base shell, and the mounting seat is located between the base and the seat body; the at least one limiting structure includes a lower limiting structure, and 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 through the mounting seat to the seat portion, and the second lower limiting member is configured to protrude from the back of the seat portion, and when the seat body is in a rearward position relative to the base, the first lower limiting member and the second lower limiting member cooperate.

[0008] In one embodiment of the present application, when the seat body is in a rearward position relative to the base, the first lower limiting member and the second lower limiting member are clearance-fitted; and at least one of the first lower limiting member and the second lower limiting member has a hook-shaped cross-section.

[0009] In one embodiment of the present application, the support frame includes two longitudinal bars and a second cross bar connected between the two longitudinal bars, a fixing seat is provided on the second cross bar, and the second lower limiting member extends from the fixing seat.

[0010] In one embodiment of the present application, the abutment portion of the base shell is provided with a clamping groove and a belt clamp; the first end of the belt clamp is pivotally connected to the base shell, and the second end of the belt clamp is provided with a third locking mechanism, and the belt clamp is locked in the clamping groove by the third locking mechanism to clamp the vehicle seat belt at the abutment portion.

[0011] In one embodiment of the present application, the support frame is configured to be operably slidable relative to the base shell to change the inclination angle of the seat body relative to the base.

[0012] In one embodiment of the present application, a sliding track is provided inside the base shell, and the support frame is slidably engaged 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, and 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 to position the support frame at different positions on the sliding track.

[0013] In one embodiment of the present application, the child safety seat further includes a mounting seat, through which the seat body is fixedly mounted on the support frame and can slide forward and backward relative to the base shell.

[0014] In one embodiment of the present application, the base is provided with a plurality of first locking holes; the mounting seat is provided with a first locking mechanism, the first locking mechanism including a first locking member, a first releasing member and a first traction rope; the first locking member is selectively engaged with one of the plurality of first locking holes to position the seat body at different tilt angles; the first releasing member is connected to the first locking member through the first traction rope, and is used to drive the first locking member to withdraw from the corresponding first locking hole; the mounting seat is provided with a guide wheel that cooperates with the first traction rope.

[0015] In one embodiment of the present application, the mounting seat is connected to the base shell in a non-rotatable manner; a handle is provided on the front side of the mounting seat, and the first release member is provided on the handle.

[0016] In one embodiment of the present application, at least a portion of the sliding track is formed by an attachment arranged inside the base shell, the attachment has a sliding groove that slides with the support frame, the groove wall of the sliding groove is provided with an elongated hole, and the support frame is provided with a pin that slides with the elongated hole.

[0017] In one embodiment of the present application, the support frame is provided with a guide hole that slides with the first locking member, and the first locking member passes through the guide hole and is selectively engaged with one of the multiple first locking holes.

[0018] In one embodiment of the present application, the support frame includes two longitudinal bars and two first transverse bars connected between the two longitudinal bars; the mounting seat includes: a covering portion and a clamping portion protruding downward from the covering portion; the clamping portion is clamped between the two first transverse bars.

[0019] In one embodiment of the present application, the mounting seat has a center hole; the seat body has a rotating shaft, and the center hole is pivotally connected to the rotating shaft; an axial limiting mechanism is provided on the rotating shaft, and the axial limiting mechanism cooperates with the clamping portion to form a clamping groove, and the two first cross bars are clamped to the clamping groove.

[0020] In one embodiment of the present application, the support frame further includes a second cross bar connected between the two longitudinal bars, the second cross bar being closer to the abutment portion relative to the two first cross bars, a fixing seat being provided on the second cross bar, and the fixing seat being connected to the mounting seat via fasteners.

[0021] In one embodiment of the present application, the axial limiting mechanism includes a limiting flange, and the limiting flange abuts against the two longitudinal rods.

[0022] In one embodiment of the present application, the seat portion is pivotally connected to the mounting seat so that the seat body has a forward position and a rearward position; the rotational position of the seat body relative to the mounting seat is locked by a second locking mechanism.

[0023] On the other hand, the present application provides a base for a child safety seat, comprising: a base shell, comprising a base and a supporting portion; a first upper limit member, the first upper limit member protruding forward from the supporting portion, the first upper limit member being capable of applying a backward pulling force to a seat body mounted on the base; a support ring extending from the rear side of the first upper limit member; and a top strap, the first end of the top strap being positioned below the support ring, the second end of the top strap extending upward so that the middle portion of the top strap is passed around the support ring.

[0024] In one embodiment of the present application, a support frame is provided inside the base shell, and the first upper limit member is connected to the support frame.

[0025] In one embodiment of the present application, a first opening is provided at the top of the abutting portion; the support frame is slidably engaged with the base shell, the upper end of the support frame extends from the first opening, and the first upper limit member is connected to the upper end of the support frame.

[0026] In another aspect, a child safety seat comprises: a base including a base shell and a support frame housed within the base shell; a seat body mounted on the base and having a forward position and a rearward position relative to the base; and at least one limiting structure disposed between the seat body and the support frame. The base shell is provided with an opening for the limiting structure to pass through, and the at least one limiting structure comprises an upper limiting structure and a lower limiting structure. The upper limiting structure comprises a first upper limiting member and a second upper limiting member, the first upper limiting member being disposed at the upper end of the support frame and exposed outside the opening, and the second upper limiting member being disposed on the back of the seat body. When the seat body is in the forward position, the seat body and the support frame are engaged via the upper limiting structure, and the lower limiting structure is in a disengaged state. When the seat body is in the rearward position, the seat body and the support frame are engaged via the lower limiting structure, and the upper limiting structure is in a disengaged state.

[0027] In one embodiment of the present application, the child safety seat further comprises a top tether, a first end of the top tether is connected to the first upper limit member, and a second end of the top tether is provided with an anchor for connecting to a vehicle.

[0028] In one embodiment of the present application, the first upper limit member is provided with a support ring, and the first end of the top tether is connected to the support frame and is passed around the support ring.

[0029] In one embodiment of the present application, the child safety seat further comprises a mounting seat, via which the seat body is mounted on the support frame. The support frame is configured to operably slide relative to the base shell to change the tilt angle of the seat body relative to the base shell. The opening comprises a first opening disposed at the top of the base shell, and the upper end of the support frame extends from the first opening, such that the first upper limit member is exposed outside the base shell. When the support frame slides relative to the base shell, the first upper limit member and the second upper limit member remain connected.

[0030] In one embodiment of the present application, the seat body has a pivot axis, and the seat body is pivotally connected to the mounting seat via the pivot axis, thereby rotating between the forward position and the rearward position. The lower limit structure includes a first lower limit member and a second lower limit member. The first lower limit member extends from the support frame through the mounting seat toward the seat body, and the second lower limit member is configured to protrude from the front side of the seat body. When the seat body is in the rearward position relative to the base, the first lower limit member and the second lower limit member cooperate.

[0031] In one embodiment of the present application, a sliding track is provided inside the base shell, and the support frame is slidably engaged 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, and 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 to position the support frame at different positions on the sliding track.

[0032] In one embodiment of the present application, the child safety seat further comprises: a first locking mechanism for locking the sliding movement between the support frame and the base shell, the first locking mechanism comprising: a first locking member disposed within the mounting seat and slidingly engaged with a guide hole on the support frame; a plurality of first locking holes disposed on the base shell; and a return spring disposed between the mounting seat and the first locking member for pushing the first locking member to engage the first locking hole. The first locking member passes through the guide hole and selectively connects with one of the plurality of first locking holes, thereby positioning the support frame at a plurality of different positions on the base shell.

[0033] In one embodiment of the present application, the first locking mechanism further includes: a first release member disposed on a handle at the front end of the mounting base; and a first traction rope having one end connected to the first release member and the other end connected to the first locking member. The first release member drives the first locking member out of the corresponding first lock hole via the first traction rope.

[0034] In one embodiment of the present application, the child safety seat further comprises a second locking mechanism for locking the pivotal movement between the seat body and the mounting base. The second locking mechanism is located between the seat body and the mounting base and comprises a second locking member disposed on the seat body and axially movable relative to the seat body; and a plurality of second locking holes disposed at intervals on the mounting base. The second locking member selectively connects to one of the plurality of second locking holes to lock the seat body in a forward position or a rearward position.

[0035] In one embodiment of the present application, the base shell includes a base and a rest portion extending upward from the base, the rest portion being used to rest against the backrest of a vehicle seat; the seat body is pivotally mounted on the base forward and backward through the mounting seat, the first opening is arranged at the top of the rest portion, and the rest portion is provided with a clamping groove and a belt clamp; the first end of the belt clamp is pivotally connected to the base shell, and the second end of the belt clamp is provided with a third locking mechanism, and the belt clamp is locked in the clamping groove by the third locking mechanism to clamp the vehicle seat belt at the rest portion. Simple diagram description

[0036] The drawings that constitute part of this application are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application. Figure 1 shows a perspective view of a child safety seat according to a first embodiment of the present application; Figures 2 and 3 show a side view of the child safety seat shown in Figure 1, the child seat being in a forward position and a rearward position; Figures 4 and 5 show an incomplete exploded view of the child safety seat shown in Figure 1 in different directions; Figure 6 shows a cross-sectional view of CC in Figure 2; Figure 7 shows a perspective view of the mounting base in Figures 4 and 5; Figure 8 shows an exploded view of the mounting base shown in Figure 7; Figure 9 shows another perspective view of the mounting base in Figures 4 and 5; Figure 10 shows an exploded view of the mounting base shown in Figure 9; Figure 11 shows a perspective view of the support frame of the child safety seat and the child seat shown in Figure 1; Figure 12 shows a structure of the child safety seat shown in Figure 1 mounted to the vehicle seat; Figure 13 shows the internal structure of the base of the child safety seat shown in Figure 1; Figure 14 shows a perspective view of a portion of the base of the child safety seat shown in Figure 1 and the child seat; Figure 15 shows a perspective view of the support frame in Figure 11; Figure 16 shows the internal structure of the mounting base in Figure 10; Figures 17 and 18 show a cross-sectional view of the child safety seat shown in Figure 1 to illustrate the structure of the first locking mechanism; Figures 19 and 20 show a side view of the support frame of the child safety seat shown in Figure 11, the child seat; Figure 21 shows a sectional view of the child safety seat shown in Figure 1 to illustrate the structure of the second locking mechanism; Figure 22 shows the structure of the base of the child safety seat shown in Figure 1 and the second locking mechanism; Figure 23 shows a perspective view of a child safety seat according to a second embodiment of the present application; Figures 24 and 25 show a side view of the child safety seat shown in Figure 23, the child seat being in a forward position and a rearward position; Figures 26 and 27 show different perspective views of the base of the child safety seat shown in Figure 23, wherein the belt holder is in different states; Figures 28 and 29 show the internal structure of the base shown in Figure 27, wherein the belt holder is in different states; Figure 30 shows a rear view of the base shown in Figure 29, FIG30 omits the rear housing in FIG29; Figure 31 shows a side view of the child seat in Figure 23; Figure 32 shows an incomplete exploded view of the child seat shown in Figure 31; Figure 33 shows the internal structure of the child seat shown in Figure 31; and 34 and 35 are perspective views of the bottom case in FIG. 32 from different perspectives. Implementation Method

[0037] First embodiment

[0038] Referring to FIG1 , a perspective view of a child safety seat 1000 according to a first embodiment of the present application is shown. FIG2 and FIG3 show side views of the child safety seat 1000 in different operating states. The child safety seat 1000 includes a base 1 and a seat body 2. The base 1 is mounted on a vehicle seat 900 (see FIG12 ). The seat body 2 is detachably or non-detachably mounted to the base 1. The seat body 2 is used for seating a child. In some embodiments, the inclination angle of the seat body 2 relative to the base 1 can be adjusted to meet the child's seating requirements. In some embodiments, the seat body 2 can pivot relative to the base 1 to allow the seat body 2 to have multiple operating positions. The multiple operating positions may include, for example, at least two of a forward position, a rearward position, and a side position.

[0039] It should be noted that in this embodiment, for a child safety seat 1000 having a seat body 2 with multiple operating positions, directional terms such as "front," "rear," "left," and "right" of the seat body 2 are based on the "front," "rear," "left," and "right" positions of a child seated in the seat body 2. Directional terms such as "front," "rear," "left," and "right" of the base 1 are based on the "front," "rear," "left," and "right" positions of the vehicle when the base 1 is installed on a vehicle seat 900 (see FIG12 ). These directional terms are intended solely to clarify the description of the embodiments of this application and are not intended to unduly limit the scope of protection of this application. Specifically, in FIG2 , the seat body 2 is in a forward position relative to the base 1. At this point, the front, rear, and left and right positions of the seat body 2 are consistent with those of the base 1. Arrows F and B in FIG1 and FIG2 schematically indicate the "front" and "rear" directions of the base 1, and arrows L and R schematically indicate the "left" and "right" directions of the base 1. In FIG3 , the seat body 2 is in a rearward position relative to the base 1 , and at this time, the front, rear, left, and right directions of the seat body 2 are opposite to those of the base 1 .

[0040] The structures of the base 1 and the seat body 2 will be described in detail below.

[0041] Referring to Figures 3, 4, and 12, the base 1 includes a base shell 10, a support frame 19, and a mounting seat 13. The base shell 10 may include a base 11 and a support portion 12 extending upward from the base 11. The base 11 is configured to rest or be placed against the seat surface 91 of the vehicle seat 900, while the support portion 12 is configured to abut against the seat back 92 of the vehicle seat 900. In some embodiments, the base shell 10 may include multiple rigid shells that define the outer shape of the base shell 10 and define an interior space of the base shell 10. Referring to Figure 1, the multiple rigid shells may include, for example, an upper shell 1011 and a lower shell 1012 that generally correspond to the base 11, and a front shell 1021 and a rear shell 1022 that generally correspond to the support portion 12. The upper shell 1011 and the front shell 1021 correspond to the front of the base shell 10, while the lower shell 1012 and the rear shell 1022 correspond to the back of the base shell 10. Of course, in other embodiments, the base shell 10 may have other configurations.

[0042] Referring to FIG. 12 , in some embodiments, the front surface of the base housing 10 may be provided with a clamping groove 1201 and a belt clamp 129. The belt clamp 129 can be locked to the clamping groove 1201 via a third locking mechanism 215. In some embodiments, when the belt clamp 129 is locked in the clamping groove 1201, it can be completely embedded in the clamping groove 1201 without protruding relative to the front surface of the base housing 10. A passage (not shown) is formed between the wall of the clamping groove 1201 and the belt clamp 129 for clamping the vehicle seat belt 93 (shown by dashed lines in FIG. 12 ). After the vehicle seat belt 93 passes through the passage between the wall of the clamping groove 1201 and the belt clamp 129, the male buckle of the vehicle seat belt 93 engages with the female buckle on the vehicle seat 900, securing the abutment portion 12 of the base 1 to the seat back 92. Although in the embodiment shown in Figure 12, the shoulder strap 931 and the waist belt 932 of the vehicle safety belt 93 pass through the channel between the wall of the clamping groove 1201 and the belt clamp 129 at the same time, in some alternative embodiments, only the shoulder strap 931 or the waist belt 932 of the vehicle safety belt 93 may pass through the channel between the wall of the clamping groove 1201 and the belt clamp 129.

[0043] The upper housing 1011 is omitted from the base housing 10 shown in FIG13 to facilitate illustration of the internal structure of the base housing 10. In some embodiments, the first end of the belt holder 129 is pivotally connected to the bottom housing 10 via an axis 125, and a third locking mechanism 215 is disposed at the second end of the belt holder 129. The third locking mechanism 215 is used to lock the relative position of the second end of the belt holder 129 to the base housing 10, thereby locking the belt holder 129 in the clamping slot 1201. For example, an exemplary embodiment of the third locking mechanism 215 can be found in the description of the third locking mechanism 215 in the second embodiment below. For example, the third locking mechanism 215 can include an axially movable third locking member configured to engage with a third locking hole in the base housing 10. When the third locking member is separated from the third locking hole, the belt holder 129 can pivot about the axis 125, opening the clamping slot 1201, allowing the vehicle seat belt 93 to be placed into or removed from the clamping slot 1201.

[0044] The support frame 19 is mounted on the base shell 10 and can slide relative to the base shell 10. Referring to Figure 11 , the mounting seat 13 is mounted to the support frame 19 and slides synchronously with it. The seat body 2 is mounted to the mounting seat 13, and in turn, to the support frame 19. That is, the mounting seat 13 is located between the base 1 and the seat body 2. Therefore, when the support frame 19 slides relative to the base shell 10, the mounting seat 13 and the seat body 2 slide together relative to the base shell 10, thereby changing the tilt angle of the seat body 2 relative to the base 1. It will be understood that when the support frame 19 slides relative to the base shell 10, it moves forward and backward relative to the base shell 10 while also pivoting relative to the base shell 10, thereby causing the tilt angle of the seat body 2 relative to the base 1 to change. In some embodiments, the support frame 19 is primarily constructed of multiple metal pipes connected by welding, screwing, or other methods, and has sufficient structural strength.

[0045] Referring to Figures 13 and 14 , in some embodiments, a sliding track 101 is disposed within the base shell 10. The sliding track 101 extends at least within the base portion 11, and the support frame 19 slidably engages with the sliding track 101. In some embodiments, the sliding track 101 extends within the abutment portion 12. The base shell 10 shown in Figure 13 omits the upper shell 1011, thereby partially illustrating the structure of the sliding track 101. The portion of the sliding track 101 located within the abutment portion 12 is obscured by the front shell 1021. The child safety seat 1000 shown in Figure 14 also omits the upper shell 1011, thereby illustrating the structure of the supporting frame 19 slidably engaging with the sliding track 101. The support frame 19 also serves to enhance the structural strength of the base shell 10.

[0046] Referring again to Figures 4, 12, and 13, in some embodiments, the top of the abutment portion 12 of the base housing 10 has a first opening 1203, through which the upper end of the support frame 19 extends. In some embodiments, a first upper limit member 311 is mounted on the upper end of the support frame 19. The structure of the first upper limit member 311 will be described in detail below. Referring to Figures 4 to 12, in some embodiments, a decorative shell 195 may be mounted on the upper end of the support frame 19. The decorative shell 195 slidably engages with the first opening 1203 to seal it. Furthermore, the decorative shell 195 conceals unnecessary exposed structure on the upper end of the support frame 19.

[0047] Figure 15 shows an exemplary structure of the support frame 19. The support frame 19 includes two longitudinal bars 191 and a plurality of transverse bars connected between the two longitudinal bars 191, including but not limited to a first transverse bar 192 and a second transverse bar 193. The support frame 19 slidably engages with the sliding track 101 primarily through the two longitudinal bars 191. Referring to Figures 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, and a front housing 1021 and a rear housing 1022.

[0048] In some embodiments, at least a portion of the sliding track 101 can be formed by an attachment 1013 located within the base housing 10. The attachment 1013 is formed with a slide groove 10130, with the longitudinal rod 191 slidably engaged with the slide groove 10130. In other words, the slide groove 10130 forms a portion of the sliding track 101. In some embodiments, the groove wall of the slide groove 10130 can be provided with an elongated hole 10131, and the longitudinal rod 191 can be mounted with a pin 1916 that slidably engages with the elongated hole 10131 to limit the sliding travel of the support frame 19. In some embodiments, the attachment 1013 is mounted to the lower housing 1012 via fasteners, and the notch of the slide groove 10130 is sealed by the lower housing 1012.

[0049] 15 , in some embodiments, each longitudinal rod 191 may be formed by connecting multiple rod segments, which can reduce the difficulty of manufacturing the longitudinal rod 191. Each longitudinal rod 191 includes, for example, a first rod segment 1911, a second rod segment 1912, and a third rod segment 1913.

[0050] Each first rod segment 1911 extends from the interior of the base 11 to the interior of the abutment portion 12. The two first rod segments 1911 of the two longitudinal rods 191 are substantially parallel. In some embodiments, each first rod segment 1911 has a curved section 19111, and the sliding track 101 also has a curved track (not numbered in the figure) that slidably engages with the curved section 19111. The curved section 19111 is, for example, located at the front end of the first rod segment 1911, corresponding to the sliding track within the base 11. The rear end of the first rod segment 1911 has, for example, a straight section 19112 that extends within the abutment portion 12. The first end of the second rod segment 1912 is plugged into the straight section 19112, and the second end of the second rod segment 1912 extends toward the top of the abutment portion 12.

[0051] In some embodiments, each second rod segment 1912 has a zigzag shape, such that the distance between the second ends 19122 of the two second rod segments 1912 of the two longitudinal rods 191 is reduced relative to the distance between the first ends thereof. 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 from the first opening 1203. The first upper limit member 311 can be connected to the second ends of the two third rod segments 1912, for example, by welding or fasteners.

[0052] In some embodiments, each longitudinal rod 191 may have other embodiments. For example, the second end of each second rod segment 1912 may extend directly from the first opening 1203, and the first upper limit member 311 may be connected to the second end of each second rod segment 1912. In this way, the third rod segment 1913 may be omitted. Alternatively, in some embodiments, each longitudinal rod 191 may be an integrally formed rod.

[0053] Referring again to Figures 4 to 12 , exemplary structures of the mounting base 13 and exemplary connection methods of the mounting base 13 to the support frame 19 are illustrated. In some embodiments, the left-right, fore-and-aft, and up-and-down 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. Restricting the rotation of the mounting base 13 relative to the support frame 19 can also be considered as a non-rotatable connection between the mounting base 13 and the base shell 10. That is, the mounting base 13 does not rotate relative to the base shell 10 to switch the seat body 2 to the forward or rearward position.

[0054] Referring to Figures 4 to 10 , in some embodiments, the mounting base 13 includes an upper housing 1301 and a lower housing 1302. The upper housing 1301 and the lower housing 1302 can be connected, for example, by fasteners (not shown). The upper housing 1301 and the lower housing 1302 can define a stepped pivot hole, a detailed description of which can be found in the section "Center Hole 130" below.

[0055] Referring to Figures 4 and 12 , the front of the base 11 is provided with a second opening 110, and the mounting seat 13 covers the second opening 110. In some embodiments, the dimensions of the mounting seat 13 are designed so that when the mounting seat 13 slides relative to the base housing 10 following the support frame 19, the mounting seat 13 remains covered around the perimeter of the second opening 110, minimizing exposure of the second opening 110. Referring to Figure 9 , in some embodiments, the mounting seat 13 includes a covering portion 13a that covers the second opening 110 and a latching portion 13b that protrudes downward from the covering portion 13a. The latching portion 13b is smaller than the covering portion 13a.

[0056] Referring to Figure 11 , in some embodiments, support frame 19 includes two first crossbars 192. These two first crossbars 192 and two longitudinal bars 191 define a space through which the engaging portion 13b of mounting base 13 passes. In some embodiments, the two first crossbars 192 engage with the engaging portion 13b to restrict forward and backward movement of mounting base 13 relative to support frame 19.

[0057] In some embodiments, the engagement of the clamping portion 13b with the two first cross bars 192 can further restrict the rotation of the mounting base 13 relative to the support frame 19. For example, the surfaces of the clamping portion 13b used to engage with the two first cross bars 192 can be designed as flat surfaces. The engagement of the clamping portion 13b with the two first cross bars 192 can thus restrict the rotation of the mounting base 13 relative to the support frame 19. Of course, there are many other ways to restrict the rotation of the mounting base 13 relative to the support frame 19, such as connecting the mounting base 13 and the support frame 19 via multiple fasteners, which can be distributed on the two first cross bars 192.

[0058] In some embodiments, the clamping portion 13b can be clamped between the two longitudinal bars 191, thereby limiting the left and right movement of the mounting seat 13 relative to the support frame 19. Of course, there are many ways to limit the left and right movement of the stopper 1303 relative to the support frame 19. For example, in some embodiments, two additional longitudinal bars parallel to the longitudinal bars 191 are connected between the two first transverse bars 192. These additional longitudinal bars engage the clamping portion 13b to limit the left and right movement of the mounting seat 13 relative to the support frame 19. Alternatively, in some embodiments, the mounting seat 13 can be directly or indirectly connected to the axial limiter 6. The axial limiter 6 can be clamped between the two longitudinal bars 191 to limit the left and right movement of the mounting seat 13 relative to the support frame 19. Furthermore, the axial limiter 6 can cooperate with the clamping portion 13b to form a slot 1304. The two first transverse bars 192 engage the slot 1304, thereby limiting the forward and backward movement of the mounting seat 13 relative to the support frame 19 and the vertical movement of the mounting seat 13 relative to the support frame 19.

[0059] In some embodiments, referring to Figures 4, 11 and 15, the support frame 19 can also be connected to the mounting seat 13 through the fixing seat 196. The connection between the fixing seat 196 and the support frame 19 and the mounting seat 13 can further limit the relative movement and / or relative rotation between the support frame 19 and the mounting seat 13.

[0060] Figures 4 and 15 illustrate an exemplary structure of a fixing base 196. Fixing base 196 may include a plate 1961 and an arm 1962 extending from plate 1961. Plate 1961 abuts against mounting base 13. Plate 1961 and mounting base 13 (more specifically, lower housing 1302) are provided with holes 19610 and 13010, respectively. Mounting base 13 and support frame 19 can be connected via fasteners inserted through holes 19610 and 13010. Arm 1962 has a hole 19620, which fits over a second crossbar 193 located between two longitudinal bars 191. Second crossbar 193 is closer to abutment portion 12 than first crossbar 192. In some embodiments, hole 19620 is non-circular, allowing arm 1962 to fit non-rotatably over second crossbar 193. In some embodiments, the front side of the base shell 10 may further be provided with a guide groove 106 that communicates with the second opening 110 and slidably cooperates with the arm body 1962.

[0061] 11 and 16 , in some embodiments, a handle 136 may be provided 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.

[0062] 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. Figures 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 mounting base 13 shown in FIG16 omits the upper housing 1301 to facilitate illustration of the structure of the first locking mechanism 131.

[0063] The first locking mechanism 131 includes an axially movable first locking member 1311. The base housing 10 (more specifically, the base 11) is provided with a plurality of first locking holes 1310, spaced apart along the sliding direction of the support frame 19. The first locking member 1311 selectively engages with one of the plurality of first locking holes 1310, thereby positioning the support frame 19 in different sliding positions and, in turn, positioning 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 provided on the sliding track 101 of the support frame 19. More specifically, the plurality of first locking holes 1310 are provided on the sliding track 101 of the first rod segment 1911 of each longitudinal rod 191.

[0064] Referring to Figures 7, 8, and 17, in some embodiments, each first locking hole 1310 is disposed in the lower housing 1012. Each first locking hole 1310 forms an angle with the horizontal plane. Referring to Figure 16, the first locking mechanism 131 also includes a first release member 1312, which 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 via a fastener (not shown) inserted through the hole 13011 of the mounting base 13, and the first release member 1312 can be mounted on the handle 136. The first release member 1312 is connected to the first locking member 1311 via a first traction rope 1313 (shown in dashed lines in Figure 16). The first end of the first locking member 1311 is located within the mounting base 13 and abuts against a first return spring 1314, which is used to push the first locking member 1311 so that the second end of the first locking member 1311 engages with the corresponding first locking hole 1310.

[0065] As shown in Figure 16, the first release member 1312 is located on a handle 136 located on the front side of the mounting base 13. As can be seen 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. This allows the tilt angle of the seat body 2 relative to the base 1 to be easily adjusted even when the seat body 2 is adjusted to the forward or rearward position. This avoids the problem of the related art where the first release member is located below the front side of the seat body. When the seat body is rotated to the rearward position, the front side of the seat body is close to or abuts the abutment, leaving little room for the first release member to operate, making it difficult to adjust the tilt angle of the seat body relative to the base.

[0066] 17 and 18 , when the sliding position of the support frame 19 needs to be adjusted, the user grips the handle 136 while pressing the first release member 1312. The first release member 1312 pulls the first locking member 1311 via the first traction rope 1313, causing the second end of the first locking member 1311 to exit the first locking hole 1310. The user then pulls or pushes the handle 136 to adjust the seat body 2 to a desired tilt angle. The first release member 1312 is then released, and the first locking member 1311, pushed by the first return spring 1314, engages with the corresponding first locking hole 1310, positioning the seat body 2 at the adjusted tilt angle.

[0067] As can be seen from Figures 16 to 18, in some embodiments, a guide wheel 1103 can be provided in the mounting seat 13, the guide wheel 1103 is close to the first locking member 1311, and the first traction rope 1313 is connected to the first locking member 1311 after being wrapped around the guide wheel 1103.

[0068] In some embodiments, the longitudinal rod 191 of the support frame 19 is provided with a guide hole 190 , and the first locking member 1311 is slidably engaged with the guide hole 190 .

[0069] Referring to Figures 19 and 20 , the seat body 2 includes a seat portion 21 and a backrest portion 22 extending upward from the seat portion 21. A headrest 23 may be mounted on the backrest portion 22. The seat portion 21 is rotatably mounted to the mounting base 13, allowing the seat body 2 to pivot relative to the base 1, thereby assuming multiple operating positions. For ease of understanding, the base housing 10 of the base 1 is omitted in Figures 19 and 20 .

[0070] Referring again to Figures 4 and 6 , in some embodiments, the seat 21 and the mounting base 13 are rotatably connected. In some embodiments, the seat 21 includes, for example, a pivot shaft 210, and the mounting base 13 has a central hole 130 (also referred to herein as a stepped pivot hole). This central hole 130 may be defined by an upper housing 1301 and a lower housing 1302. The pivot shaft 210 is pivotally received in the central hole 130.

[0071] Continuing with FIG. 6 , in some embodiments, the seat portion 21 is mounted with the aforementioned axial limiting mechanism 6. In some embodiments, the axial limiting mechanism 6 may include a sleeve portion 6a and a limiting flange 6b. The sleeve portion 6a may be sleeved onto the rotary shaft 210 and pivotally connected to the center hole 130. The limiting flange 6b is located below the two first cross bars 192 and may abut against the two first cross bars 192.

[0072] Referring again to Figures 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 at least one limiting structure 3. The limiting structure 3 is used to apply a pulling force to the seat body 2 to prevent the seat body 2 from tipping forward relative to the base 1 when the vehicle brakes unexpectedly, potentially injuring the child.

[0073] Referring to Figure 2, in some embodiments, the limiting structure 3 includes an upper limit structure 32. When the seat body 2 is in the forward position and the vehicle suddenly brakes, the backrest 22 of the seat body 2 is engaged with the support frame 19 through the upper limit structure 31. The upper limit structure 31 pulls the backrest 22 of the seat body 2, which can effectively prevent the seat body 2 from tipping forward relative to the base 1.

[0074] Continuing with FIG. 2 , in some embodiments, the upper limit structure 32 includes a first upper limit member 311 and a second upper limit member 312 . As previously described, the first upper limit member 311 can be disposed on the upper end of the support frame 19 extending from the abutment portion 12 . Referring to FIG. 11 , the second upper limit member 312 can be disposed on the back of the backrest portion 22 . When the seat body 2 is in the forward position, the first upper limit member 311 and the second upper limit member 312 engage with each other, such as with a clearance fit. It should be noted that when the seat body 2 is in the forward position, the first upper limit member 311 and the second upper limit member 312 do not always maintain contact with each other. As long as the first upper limit member 311 and the second upper limit member 312 engage with each other when the seat body 2 tilts forward relative to the base 1 , they can apply a backward pulling force to the backrest portion 22 of the seat body 2 .

[0075] Continuing with Figure 2 , in some embodiments, the first and second upper-limiting members 311, 312 can have hook-shaped cross-sections, interlocking with each other. In some embodiments, the first and second upper-limiting members 311, 312 can both extend along an arc, ensuring sufficient contact area while preventing interference with the rotation of the seat body 2 relative to the base 1. Of course, the first and second upper-limiting members 311, 312 can also be implemented in other ways, not limited to the examples above.

[0076] Referring to Figures 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 , for example, for connection to an anchor point on the back of the vehicle seat 900 . In some embodiments, the first end 41 of the top tether 4 may extend into and be secured within the base shell 10 . More specifically, the first end 41 of the top tether 4 may be connected to a fixing 114 . In some embodiments, the fixing 114 may be, but is not limited to, fixed to the support frame 19 . The top tether 4 may also be provided with an adjuster 45 for adjusting the length of the top tether 4 .

[0077] With reference to Figures 15 and 21 , in some embodiments, a support ring 315 is provided on the first upper limit member 311. The second end 42 of the top tether 4 passes through the support ring 315 as it extends upward. In other words, the middle portion of the top tether 4 passes through the support ring 315. When the vehicle suddenly brakes, the first upper limit member 311 simultaneously tightens the second upper limit member 312 while also being tightened by the top tether 4. This allows the force of the seat body 2 tilting forward to be transmitted to the vehicle seat 900 via the upper limit structure 31 and the top tether 4. Furthermore, the first upper limit member 311 is simultaneously subjected to two oppositely directed tensile forces, which offset each other, effectively preventing damage to the first upper limit member 311.

[0078] In some embodiments, the first upper limit member 311 may include a plate 3111 and a hook 3112 extending forward from the upper end of the plate 3111 , and the support ring 315 may extend from the rear side of the plate 3111 .

[0079] Referring to Figure 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 position and the vehicle suddenly brakes, the seat portion 21 of the seat body 2 is engaged with the support frame 19 through the lower limiting structure 32. The lower limiting structure 32 pulls the seat portion 21 of the child seat, which can effectively prevent the seat body 2 from tipping forward relative to the base 1.

[0080] Continuing with FIG. 3 , in some embodiments, the lower retaining structure 32 includes a first lower retaining member 321 and a second lower retaining member 322. The first lower retaining member 321 can extend from the support frame 19 toward the seat 21. The first lower retaining member 321 passes through the mounting base 13. The second lower retaining member 322 can be configured to protrude from the back of the seat 21. For example, the second lower retaining member 322 is located on the front side of the back of the seat 21. When the seat body 2 is in the rearward position, the first lower retaining member 321 and the second lower retaining member 322 engage, for example, with a clearance fit. It should be noted that when the seat body 2 is in the rearward position, the first lower retaining member 321 and the second lower retaining member 322 do not necessarily remain in contact with each other. As long as the first lower retaining member 321 and the second lower retaining member 322 engage when the seat body 2 tilts forward relative to the base 1, they are sufficient to apply a rearward pulling force to the seat 21 of the seat body 2.

[0081] Referring to Figure 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 the two are hooked together. In some embodiments, the first lower limiting member 321 may include, for example, one, two, or more hook-shaped members extending upward from the fixing seat 196, while the second lower limiting member 322 may extend along an arc and have a hook-shaped cross-section. Of course, the embodiments of the first lower limiting member 321 and the second lower limiting member 322 are not limited to the above examples.

[0082] 21 and 22 , the rotational position of the seat body 2 relative to the mounting base 13 can be locked by a second locking mechanism 213. Figures 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. Figure 22 omits a portion of the seat body 2 housing to facilitate illustration of the structure of the second locking mechanism 213.

[0083] Referring to Figure 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 along the rotational direction of the seat body 2. The second locking member 2131 selectively engages with one of the plurality of second locking holes 2130, thereby positioning the seat body 2 in different operating positions.

[0084] With reference to Figures 1, 21, and 22, the second locking mechanism 213 also includes second release members 2132, which can be mounted on the armrests on either side of the seat 21. The second release members 2132 are connected to the second locking member 2131 via a second traction rope 2133 (shown in dashed lines in Figure 21). The first end of the second locking member 2131 is located within the seat 21 and abuts against a second return spring 2134, which is used to push the second locking member 2131, causing its second end to engage with the corresponding second lock hole 2130.

[0085] When the orientation of the seat body 2 needs to be adjusted, the second release member 2132 is pressed. The second release member 2132 pulls the second locking member 2131 via the second traction rope 2133, causing the second end of the second locking member 2131 to exit the second locking hole 2130. The seat body 2 is then rotated. When the seat body 2 is rotated to the desired orientation, the second release member 2132 is released. The second locking member 2131, pushed by the second return spring 2134, engages with the corresponding second locking hole 2130.

[0086] In the child safety seat 1000 provided in 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, mounting base 13, and support frame 19 move synchronously. When adjusting the tilt angle of the seat body 2 relative to the base 1 in the forward position, the first upper limit member 311 and the second upper limit member 312 of the upper limit structure 31 move synchronously and remain connected. Similarly, when adjusting the tilt angle of the seat body 2 relative to the base 1 in the rearward position, the first lower limit member 321 and the second lower limit member 322 of the lower limit structure 32 move synchronously and remain connected.

[0087] In addition, in some embodiments not shown, for example, the child safety seat 1000 provided in the first embodiment of the present application may be modified as follows:

[0088] 1. In some embodiments, the seat body 2 cannot rotate relative to the base 1. That is, the seat body 2 can only have one of a forward position and a rearward position. Accordingly, the child safety seat can be configured with only one of the first upper limit member 321 and the second lower limit member 322.

[0089] 2. In some embodiments, the child safety seat 1000 may omit the mounting seat 13 , and instead the seat portion 21 of the seat body 2 may be directly fixedly connected to the support frame 19 of the base 1 .

[0090] In some embodiments, the mounting base 13 can be connected to the turntable via a rotating mechanism, and the seat body 2 can be removably connected to the turntable. For example, the seat portion 21 of the seat body 2 can be removably engaged with the turntable. It is understood that the seat body 2 can rotate with the turntable to a forward position, a rearward position, and so on.

[0091] Second embodiment

[0092] Referring to Figure 23, a perspective view of a child safety seat 1000 according to a second embodiment of the present application is shown. Figures 24 and 25 show side views of the child safety seat 1000 in different operating states. The child safety seat 1000 comprises a base 1 and a seat body 2. The base 1 is mounted on a vehicle seat. The seat body 2 is mounted on the base 1 in a detachable or non-detachable manner. The seat body 2 is used to seat a child.

[0093] The orientation of the seat body 2 and the orientation of the base 1 in this embodiment can be referred to the explanation in the first embodiment and will not be repeated here. The structure of the base 1 and the seat body 2 will be described in detail below.

[0094] Referring to Figures 26 to 29 , the base 1 includes a base shell 10 and a support frame 19 . The base shell 10 may include a base 11 and a support portion 12 extending upward from the base 11. The base 11 is intended to rest on the seat surface of a vehicle seat, while the support portion is intended to abut against the seatback of the vehicle seat. In some embodiments, the base shell 10 may include multiple rigid shells that define the outer shape of the base shell 10 and define the interior space of the base shell 10. Referring to Figure 27 , the multiple rigid shells may include, for example, an upper shell 1011 and a lower shell 1012 that generally correspond to the base 11, and a front shell 1021 and a rear shell 1022 that generally correspond to the support portion 12. The upper shell 1011 and the front shell 1021 correspond to the front of the base shell 10, while the lower shell 1012 and the rear shell 1022 correspond to the back of the base shell 10. Of course, in other embodiments, the base shell 10 may have other configurations.

[0095] Referring to FIG. 27 , in some embodiments, a mounting seat 13 is mounted on the front of the base 11. Unlike the first embodiment described above, the mounting seat 13 in this second embodiment cannot slide forward and backward relative to the base shell 10. The seat 21 of the chair body 2 is mounted on the mounting seat 13.

[0096] 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, by changing the mounting orientation of the seat body 2 on the mounting base 13, the seat body 2 can have multiple operating positions. The multiple operating positions include, for example, a forward position and a rearward position.

[0097] In some embodiments, the mounting base 13 can be pivotally connected to the base 11 via any suitable pivot mechanism (not shown). Thus, the seat body 2 can have multiple working positions as the mounting base 13 rotates. These multiple working positions can include, for example, at least two of the following: a forward position, a rearward position, and a sideways position.

[0098] In some embodiments, the rotational 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, for example, is mounted inside the mounting base 13 and may include a fourth release member 134, an axially movable fourth locking member (not shown), a fourth return spring (not shown) abutting against the fourth locking member, and a fourth pull rope (not shown) connected between the fourth release member 134 and the fourth locking member. The base housing 10 is provided with a plurality of fourth locking holes (not shown). Driven by the fourth return spring, the fourth locking member selectively connects with the plurality of fourth locking holes to position the seat body 2 on the mounting base 13 in different working positions. When the fourth release member 134 is pressed, the fourth pull rope pulls the fourth locking member out of the fourth locking hole, allowing the seat body 2 to be installed. When the seat body 2 is rotated to the desired orientation, the fourth release member 134 is released, and the fourth locking member, driven by the fourth return spring, engages with the corresponding fourth locking hole.

[0099] Figures 26 and 27 illustrate an exemplary structure in which the seat body 2 is detachably mounted on the mounting base 13. The mounting base 13 may be provided with a snap-fit ​​mechanism 137, and a snap-fit ​​rod 27 (see Figure 32) is provided at the bottom of the seat body 2. The snap-fit ​​mechanism 137 is configured to detachably engage with the snap-fit ​​rod 27. In some embodiments, the snap-fit ​​mechanism 137 includes a plurality of snap-fit ​​grooves 1370 provided on the mounting base 13 and a plurality of snap-fit ​​hooks 1371 that engage with the snap-fit ​​grooves 1370. The snap-fit ​​rod 27 of the seat body 2 can be inserted into the snap-fit ​​grooves 1370 and locked by the snap-fit ​​hooks 1371. The snap-fit ​​mechanism 137 may also include a release member 1372 operatively connected to each snap-fit ​​hook 1371 to drive the snap-fit ​​hooks 1371 to release the snap-fit ​​rod 27. In some embodiments, a display device 1373 may be provided on the mounting base 13, and the display device 1373 is used to display whether the locking rod 27 is locked by the locking hook 1371.

[0100] 27 , a clamping groove 1201 and a belt clamp 129 may be provided on the front of the base shell 10. The belt clamp 129 may be locked in the clamping groove 1201 by a third locking mechanism 215 to form a channel for clamping the vehicle seat belt between the wall of the clamping groove 1201 and the belt clamp 129 (see the description of the first embodiment above).

[0101] The upper housing 1011 and front housing 1021 of the bottom housing 10 are omitted in Figures 28 and 29 to facilitate illustrating the internal structure of the bottom housing 10. In some embodiments, the first end of the belt holder 129 is pivotally connected to the bottom housing 10 via the shaft 125, and the third locking mechanism 215 is provided at the second end of the belt holder 129. The third locking mechanism 215 is used to lock the relative position of the second end of the belt holder 129 and the base housing 10, thereby locking the belt holder 129 in the clamping slot 1201.

[0102] 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 also be mounted on the bottom housing 10. The locking member 105 may be formed with a third locking hole 1050. The third locking member 2151 may be inserted into or removed from the third locking hole 1050. When the third locking member 2151 is removed from the third locking hole 1050, the belt clamp 129 may pivot about the axis 125 to open the clamping slot 1201. When the third locking member 2151 is inserted into the third locking hole 1050, the belt clamp 129 is locked in the clamping slot 1201. In some embodiments, an operating hole 1290 is provided on the surface of the belt clamp 129, and the third releasing member 2152 connected to the third locking member 2151 corresponds to the operating hole 1290. The user can operate the third releasing member 2152 through the operating hole 1290, thereby driving the third locking member 2151 to exit the third locking hole 1050.

[0103] 28 and 29 , the support frame 19 is mounted inside the base housing 10. Unlike the first embodiment described above, the support frame 19 in this second embodiment is connected to the base housing 10, for example, by fasteners, and the support frame 19 cannot slide relative to the base housing 10. In some embodiments, the support frame 19 primarily serves to enhance the structural strength of the base housing 10. In some embodiments, the support frame 19 may include two longitudinal rods 191, which may be connected 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. The first upper limit member 311 may be connected to the U-shaped rod 197 and protrude forward from the top of the abutment portion 12.

[0104] In some embodiments, each longitudinal rod 191 of the support frame 19 may be provided with a reinforcement bracket 1917, which is used to strengthen the structural strength of the bend of each longitudinal rod 191. In some embodiments, at least one cross bar 1922 may be provided between two longitudinal rods 191 of the support frame 19.

[0105] 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, which is used, for example, to connect to an anchor point on the back of a vehicle seat.

[0106] Figure 30 omits the upper, front, and rear housings of the base housing 10 to facilitate illustration of 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 connect to a fixing member 114. The fixing member 114 can, for example, be fixed to the support frame 19. More specifically, the fixing member 114 and the first upper limit member 311 are simultaneously fixed to the U-shaped rod 197 via fasteners.

[0107] In some embodiments, a support ring 315 is provided on the first upper limit member 311, and the second end 42 of the top tether 4 passes through the support ring 315 as it extends upward. In other words, the middle portion of the top tether 4 passes through the support ring 315. When the vehicle suddenly brakes, the first upper limit member 311 simultaneously tightens the second upper limit member 312 while being tightened by the top tether 4. This allows the force causing the seat body 2 to tilt forward to be transmitted to the vehicle seat via the upper limit structure 31 including the first upper limit member 311 and the top tether 4. Furthermore, the first upper limit member 311 is simultaneously subjected to two oppositely directed tensile forces, which offset each other, effectively preventing damage to the first upper limit member 311.

[0108] In some embodiments, the first upper limit member 311 includes a plate 3111 and a hook 3112 extending forward from the upper end of the plate 3111 , and the support ring 315 can extend from the rear side of the plate 3111 .

[0109] Referring to Figures 31 and 32 , the seat body 2 includes a seat portion 21 and a backrest portion 22 extending upward from the seat portion 21. A headrest 23 may be mounted on the backrest portion 22. The housing of the seat body 2 may include a body shell 201 and a bottom shell 202 mounted on the back of the body shell. The body shell 201 forms a space for a child to sit in. In some embodiments, both the body shell 201 and the bottom shell 202 have portions corresponding to the seat portion 21, or both the body shell 201 and the bottom shell 202 have portions corresponding to the seat portion 21 and the backrest portion 22.

[0110] 32 , the bottom housing 202 is provided with a plurality of engaging rods 27 for detachably connecting to the engaging structure 137 of the mounting base 13. The main housing 201 can be slidably mounted to the bottom housing 202, so that the tilt angle of the main housing 201 relative to the bottom housing 202 can be adjusted.

[0111] 33 to 35 show exemplary structures of the main housing 201 and the bottom housing 202. In some embodiments, the main 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, and the plurality of sliding rods 2021 and the plurality of elongated holes 2010 are slidably fitted.

[0112] As shown in Figures 33 to 35 , three slide bars 2021 are mounted on the bottom housing 202. These slide bars 2021 may include a front slide bar 20211, a middle slide bar 20212, and a rear slide bar 20213. The main housing 201 is provided with elongated holes 2010 at the ends of each slide bar 20213. In some embodiments, the middle slide bar 20212 is sleeved within a locking rod 27.

[0113] 33 and 35 , the sliding position of the main body housing 201 relative to the bottom housing 202 can be locked by a fifth locking mechanism 235. Figures 33 and 35 illustrate a schematic structure of the fifth locking mechanism 235. The fifth locking mechanism 235 may include an axially movable fifth locking member 2351, a fifth release member 2352, a fifth traction rope 2353 connected between the fifth locking member 2351 and the fifth release member 2352, and a fifth return member 2354 for driving the fifth locking member 2351 to return to its original position. The fifth locking member 2351 may be mounted on a mounting bracket 2025 fixed to the bottom housing 202, the fifth return member 2354 may abut against the fifth locking member 2351, and the fifth release member 2352 may be mounted, for example, on the front side of the bottom housing 202. The main body shell 201 can be provided with a plurality of fifth locking holes 2350, and the fifth locking member 1311 is selectively connected to the plurality of fifth locking holes 2350, thereby positioning the main body shell 201 at different sliding positions to meet the riding needs of children.

[0114] Referring again to Figures 24 and 25 , in some embodiments, the child safety seat 1000 may further include at least one limiting structure 3. The seat body 2 and the base 1 may be connected by at least one limiting structure 3. The limiting structure 3 is used to apply a pulling force to the seat body 2 to prevent the seat body 2 from tipping forward relative to the base 1 when the vehicle brakes unexpectedly, potentially causing a dangerous situation.

[0115] Referring to Figure 24, in some embodiments, the limiting structure 3 includes an upper limiting structure 31. When the seat body 2 is in the forward position and the vehicle suddenly brakes, the upper end of the bottom shell 202 of the seat body 2 is engaged with the base 1 through the upper limiting structure 31. The upper limiting structure 31 pulls the backrest 22 of the seat body 2, which can effectively prevent the seat body 2 from tipping forward relative to the base 1.

[0116] Continuing with Figure 24 , in some embodiments, the upper limit structure 31 includes a first upper limit member 311 and a second upper limit member 312 . The first upper limit member 311 is located at the top of the abutment portion 12 . In some embodiments, as previously described, the first upper limit member 311 can be disposed at the upper end of the U-shaped rod 197 of the support frame 19 , protruding forward relative to the abutment portion 12 . With reference to Figure 34 , the second upper limit member 312 can be disposed at the top of the bottom shell 202 . When the seat body 2 is in the forward position, the first upper limit member 311 and the second upper limit member 312 engage, for example, with a clearance fit. It should be noted that when the seat body 2 is in the forward position, the first upper limit member 311 and the second upper limit member 312 do not necessarily remain in contact with each other. As long as the first upper limit member 311 and the second upper limit member 312 engage when the seat body 2 tilts forward relative to the base 1 , they are sufficient to apply a rearward pulling force to the backrest portion 22 of the seat body 2.

[0117] Continuing with Figure 24 , in some embodiments, the first and second upper-limiting members 311, 312 can have hook-shaped cross-sections, allowing them to hook into each other. In some embodiments, the first and second upper-limiting members 311, 312 can both extend along an arc, ensuring sufficient contact area while preventing interference with the rotation of the seat body 2 relative to the base 1. Of course, the first and second upper-limiting members 311, 312 can also have other implementations and are not limited to the examples above.

[0118] 34 and 35 , in some embodiments, the second upper limit member 312 is connected to the slide rod 20213 , for example, via a centering member 313 .

[0119] Referring to Figure 25, in some embodiments, the limiting structure 3 includes a lower limiting structure 32. When the seat body 2 is in the rearward position and the vehicle suddenly brakes, the front end of the bottom shell 202 of the seat body 2 is engaged with the base 1 through the lower limiting structure 32. The lower limiting structure 32 pulls the seat portion 21 of the child seat, which can effectively prevent the seat body 2 from tipping forward relative to the base 1.

[0120] Continuing with 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 toward the seat portion 21, and the second lower limiting member 322 is disposed at the front end of the bottom shell 202. When the seat body 2 is in the rearward position, the first lower limiting member 321 and the second lower limiting member 322 engage with each other, for example, with a clearance fit. It should be noted that when the seat body 2 is in the rearward position, the first lower limiting member 321 and the second lower limiting member 322 do not necessarily remain in contact with each other. As long as the first lower limiting member 321 and the second lower limiting member 322 engage with each other when the seat body 2 tilts forward relative to the base 1, they are sufficient to apply a rearward pulling force to the seat portion 21 of the seat body 2.

[0121] Continuing with Figure 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 the two are hooked together. Referring to Figure 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 Figures 34 and 35 , the second lower limiting member 322, for example, includes one, two, or more fixing rings extending from the bottom housing 202. Of course, the embodiments 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 slide bar 20211 and / or a locking rod 27, for example, via a centering member 324.

[0122] According to the child safety seat 1000 of the present application, when the tilt angle of the main body shell 201 is changed, the bottom shell 202 does not move relative to the base 1, and thus does not hinder the cooperation between the second upper limit member 312 of the bottom shell 202 and the first upper limit member 311 of the base 1, and the cooperation between the second lower limit member 322 of the bottom shell 202 and the first lower limit member 321 of the base 1.

[0123] The various technical features of the above-described embodiments can be arbitrarily combined. To make the description concise, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0124] The above-described embodiments represent only a few implementation methods of this application. While their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art may make variations and improvements without departing from the spirit of this application, and these variations and improvements fall within the scope of protection of this application. Therefore, the scope of protection of this patent application shall be determined by the appended claims.

[0125] 1000:Child safety seat 1: Base 10: Base shell 101: Sliding track 1011: Upper shell 1012: lower shell 1013: Attachment 10130: chute 10131: Long hole 1021: front housing 1022: rear housing 105: Locking piece 1050: Third keyhole 106: Guide slot 11: Base 110: Second opening 1103: Guide wheel 114:Fixer 12: abutment 1201: Clamping groove 1203: First opening 125: Axis 129:With clamp 1290: Operation hole 13: Mounting seat 13a: Covering part 13b: snap-fit ​​portion 130: Hole 1301: Upper shell 13010: hole 13011: hole 1302: Lower shell 1303:Limited seat 1304:Card slot 131: First locking mechanism 1310: First keyhole 1311: First locking member 1312: First release member 1313: First traction rope 1314: First return spring 134: Fourth release member 136:Handle 137: snap-fit ​​mechanism 1370: snap-fit ​​slot 1371: snap hook 1372: Release piece 1373: Display device 19: Support frame 190: Guide hole 191: Vertical bar 1911: First Pole Section 19111: Arc segment 19112: Straight section 1912: Second Pole Section 19122: Second end 1913: Third Pole Section 19131:First End 19132: Second end 1916: Sales 1917: Strengthening the support 192: First crossbar 1922: Crossbar 193: Second crossbar 195:Decorative shell 196:Fixed seat 1961: plate body 19610: hole 19620: hole 1962: Arm 197: U-shaped rod 2: Seat body 201: Body shell 2010: Long hole 202: bottom shell 2021: Slider 20211: Slider 20212: Slider 20213: Slider 2025: Mounting rack 21: Seat 210: Rotary axis 213: Second locking mechanism 2130: Second keyhole 2131: Second locking member 2132: Second release member 2133: Second traction rope 2134: Second return spring 215: Third locking mechanism 2151: Third locking member 2152: Third release member 22: Backrest 23: Headrest 235: Fifth locking mechanism 2350: Fifth keyhole 2351: Fifth locking member 2352: Fifth release member 2353: Fifth traction rope 2354: Fifth reset element 27: Clamping rod 3: Limiting structure 31: Upper limit structure 311: First upper limit member 3111: Plate 3112: hook body 312: Second upper limit member 313: Centered 315: Support ring 32: Lower limit structure 321: First lower limit member 322: Second lower limit member 324: Centered 4: Top tie 41: First End 42: Second End 43: Anchor 45: Regulator 6: Axial limit mechanism 6a: Sleeve 6b: Limiting flange 900: Vehicle seats 91: Seat surface 92: Chair Back 93: Car seat belts 931:Shoulder strap 932: Belt F,B,L,R: Arrow

Claims

1. A child safety seat, comprising: The base includes a base housing and a support frame housed within the base housing; The child safety seat includes a seat body mounted on a base and having a forward and a rearward position relative to the base; and at least one limiting structure disposed between the seat body and a support frame. The base housing has an opening for the limiting structure to pass through. 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 and a second upper limiting member. The first upper limiting member is disposed at the upper end of the support frame and exposed outside the opening, while the second upper limiting member is disposed on the back of the seat body. When the seat body is in the forward position, the seat body and the support frame are engaged by the upper limiting structure, and the lower limiting structure is disengaged. When the seat body is in the rearward position, the seat body and the support frame are engaged by the lower limiting structure, and the upper limiting structure is disengaged. The child safety seat also includes a mounting seat, through which the seat body is mounted on the support frame. The support frame is configured to be operably slidable relative to the base housing to change the tilt angle of the seat body relative to the base housing. The opening includes a first opening disposed at the top of the base housing, and the upper end of the support frame extends from the first opening so that the first upper limit member is exposed outside the base housing; when the support frame slides relative to the base housing, the first upper limit member and the second upper limit member remain connected.

2. The child safety seat as described in claim 1, wherein, The child safety seat also includes a top strap, a first end of which is connected to the first upper limit member, and a second end of which is provided with an anchor for connecting to the vehicle.

3. The child safety seat as described in claim 2, wherein, The first upper limit member is provided with a support ring, and the first end of the top strap is connected to the support frame and passes around the support ring.

4. The child safety seat as described in claim 1, wherein, The seat body has a pivot axis, and the seat body is pivotally connected to the mounting base via the pivot axis, thereby rotating between the forward position and the rearward position. The lower limit structure includes a first lower limit member and a second lower limit member. The first lower limit member extends from the support frame through the mounting base to the seat body, and the second lower limit member is configured to protrude from the front side of the seat body. When the seat body is in the rearward position relative to the base, the first lower limit member and the second lower limit member cooperate with each other.

5. The child safety seat as described in claim 1, wherein, The base housing has a sliding track inside, and the support frame slides in conjunction with the sliding track; the sliding track has a plurality of first locking holes; the support frame has a first locking mechanism, the first locking mechanism including a first locking member; the first locking member selectively engages with one of the plurality of first locking holes to position the support frame at different positions on the sliding track.

6. The child safety seat as described in claim 1, wherein, The child safety seat further includes: a first locking mechanism for locking the sliding between the support frame and the base housing; the first locking mechanism includes: a first locking member disposed within the mounting base and slidably engaging with a guide hole on the support frame; a plurality of first locking holes disposed on the base housing; and a return spring disposed between the mounting base and the first locking member for pushing the first locking member to engage with the first locking hole; the first locking member passing through the guide hole and selectively connecting to one of the plurality of first locking holes, thereby positioning the support frame at multiple different positions on the base housing.

7. The child safety seat as claimed in claim 6, wherein the first locking mechanism further comprises: The first unlocking element is located at the handle at the front end of the mounting base; And a first traction rope, one end of which is connected to the first release member and the other end of which is connected to the first locking member; the first release member drives the first locking member to exit from the corresponding first lock hole through the first traction rope.

8. The child safety seat as claimed in claim 4, wherein the child safety seat further comprises: A second locking mechanism is used to lock the pivoting between the seat body and the mounting base. The second locking mechanism is located between the seat body and the mounting base and includes: a second locking member disposed on the seat body and axially movable relative to the seat body; and a plurality of second locking holes disposed at intervals on the mounting base. The second locking member is selectively connected to one of the plurality of second locking holes to lock the seat body in a forward position or a rearward position.

9. A child safety seat as claimed in any one of claims 1 to 8, wherein the base housing includes a base and an abutment extending upward from the base, the abutment being for abutting against the backrest of a vehicle seat; the seat body is pivotally mounted to the base via the mounting bracket, a first opening is provided at the top of the abutment, the abutment being provided with a clamping groove and a belt clamp; a first end of the belt clamp is pivotally connected to the base housing, a second end of the belt clamp is provided with a third locking mechanism, the belt clamp being locked in the clamping groove by the third locking mechanism to clamp the vehicle seat belt at the abutment.

10. A child safety seat, comprising: The base includes a base housing and a support frame housed within the base housing; The child safety seat includes a seat body mounted on a base and having a forward and a rearward position relative to the base; and at least one limiting structure disposed between the seat body and the support frame. The base housing has an opening for the limiting structure to pass through. 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 and a second upper limiting member. The first upper limiting member is disposed at the upper end of the support frame and exposed outside the opening, while the second upper limiting member is disposed on the back of the seat body. When the seat body is in the forward position, the seat body and the support frame are engaged by the upper limiting structure, and the lower limiting structure is in a separated state. When the seat body is in the rearward position, the seat body and the support frame are engaged by the lower limiting structure, and the upper limiting structure is in a separated state. The child safety seat also includes a top strap, a first end of which is connected to the first upper limiting member, and a second end of which has an anchor for connecting to the vehicle.

11. The child safety seat as described in claim 10, wherein, The first upper limit member is provided with a support ring, and the first end of the top strap is connected to the support frame and passes around the support ring.

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