child seat

Abstract

A child seat including a seat housing (1), a headrest (2) arranged thereon in a height-adjustable manner, a top tether (3) extending from the top of the seat housing for connecting with an anchor point of a vehicle, a safety belt (40) attached to the seat housing, and a locking device (4, 50) arranged on the seat housing. The locking device includes a locking member (41, 501) and an elastic member (42, 502). The locking member is switchable between a locking position for locking one of the headrest and the safety belt (40) and an unlocking position for unlocking one of the headrest and the safety belt, and the elastic member acts on the locking member to hold the locking member in the locking position. The top tether is configured to act on the locking member when tension is applied, so that the locking member overcomes the force of the elastic member and switches from the locking position to the unlocking position.

Description

[Technical field]

[0001] The present application relates to the field of children's products, in particular child seats. [Background technology]

[0002] A child car seat is fixed to a seat in a vehicle when in use, and a child is restrained in the seat by a safety belt provided on the child car seat so as to provide safety protection for a child traveling in a motor vehicle. Some child car seats are fixed to a vehicle seat using a safety belt of the vehicle seat, and some child car seats are fixed to a vehicle seat via an ISOFIX plug and a top tether. When a child car seat provided with a top tether is fixed to a vehicle seat, an end of the top tether provided with a hook extends from a top of the backrest part of the child car seat, and the hook can be engaged with an anchor point located anywhere in the vehicle. After the hook of the top tether is engaged with the anchor point, the top tether is adjusted to a tensioned state, which can effectively prevent the forward movement of the backrest part of the child car seat in the event of an accident, thereby preventing injury to the head of the child in the child car seat. However, when the child car seat is used, it is often the case that the top tether is not tensioned or even engaged with an anchor point of the vehicle, which directly leads to an unreliable fixation of the child car seat. Summary of the Invention [Problem to be solved by the invention]

[0003] The present application is intended to provide a child seat for effectively preventing a top tether from being improperly attached when the child seat is in use. [Means for solving the problem]

[0004] The child seat provided by the embodiment of the present application includes a seat housing, a headrest height-adjustably disposed on the seat housing, a top tether extending from a top of the seat housing for connecting with an anchor point of a vehicle, a safety belt attached to the seat housing, and a locking device disposed on the seat housing and including a locking member and an elastic member, the locking member being switchable between a locking position for locking one of the headrest and the safety belt and an unlocking position for unlocking one of the headrest and the safety belt, the elastic member acting on the locking member to hold the locking member in the locking position, and the top tether being configured to act on the locking member when tension is applied so that the locking member overcomes the force of the elastic member and switches from the locking position to the unlocking position.

[0005] In one embodiment, the child car seat includes a backrest portion, the headrest is height-adjustably disposed on the backrest portion, and the top tether extends from a top of the backrest portion. The locking device is a first locking device attached to the backrest portion and includes a first locking member and a first elastic member, the first locking member is switchable between a locking position for locking the headrest and an unlocking position for unlocking the headrest, the first elastic member acts on the first locking member to hold the first locking member in the locking position, the top tether is operably connected to the first locking member, and the top tether drives and moves the first locking member when tensioned, such that the first locking member overcomes the force of the first elastic member and switches from the locking position to the unlocking position.

[0006] In one embodiment, the headrest is provided with a plurality of locking holes in the height direction of the headrest, and the backrest portion is provided with a first through hole, and the first locking members slide into the first through holes, so that when the first locking members are in a locked position, the first locking members are inserted into the corresponding locking holes to limit height adjustment of the headrest, and when the first locking members are in an unlocked position, the first locking members come out of the corresponding locking holes to allow height adjustment of the headrest.

[0007] In one embodiment, the backrest portion is provided with a first through hole, the first locking member is a sliding fit with the first through hole, and the first resilient member is a spring located within the first through hole and sleeves the first locking member.

[0008] In one embodiment, a first end of the top tether is connected to the first locking member via a connector, and a second end of the top tether extends from the top of the backrest portion.

[0009] In one embodiment, the backrest portion has a first through hole, the first locking member slides into the first through hole, the connector includes a flexible belt or chain, and an end of the first through hole has an arc-shaped structure for contacting the connector.

[0010] In one embodiment, a first end of the top tether is connected to the slider, a second end of the top tether extends from the top of the backrest portion, the slider slides with the backrest portion so as to be movable up and down, a predetermined angle is formed between the movement direction of the slider and the movement direction of the first locking member, and the first locking device further includes a motion steering mechanism connected between the slider and the first locking member and configured to convert the upward movement of the slider into movement of the first locking member from a locked position to an unlocked position.

[0011] In one embodiment, a slide limiting structure is disposed between the backrest portion and the slider.

[0012] In one embodiment, the sliding limiting structure includes a first slot disposed in the slider and a pin attached to the backrest portion and slidingly engaging with the first slot.

[0013] In one embodiment, the child seat further includes a second elastic member connected between the backrest portion and the slider, the second elastic member exerting a downward force on the slider when the top tether is tensioned.

[0014] In one embodiment, the slider has a second slot through which the first locking member passes, and the motion steering mechanism includes a riser portion coupled to the slider and having a riser ramp extending away from the backrest portion, and a drive pin coupled to the first locking member and abutting the riser ramp.

[0015] In one embodiment, the axial direction of the drive pin is perpendicular to the axial direction of the first locking member, and the drive pin is attached to or integrally formed with the first locking member.

[0016] In one embodiment, at least a portion of the hole wall of the first through hole is surrounded by a boss that projects outwardly from the backrest portion.

[0017] In one embodiment, the raised portion is formed by a U-shaped rib, the raised ramp portions are formed on two opposing walls of the U-shaped rib, the first locking member is located between the two opposing walls, and both ends of the drive pin abut against the raised ramp portions of the two opposing walls, respectively.

[0018] In one embodiment, the U-shaped rib is disposed on a mounting plate, the mounting plate is fixedly connected to the slider, the U-shaped rib passes through the second slot, and the mounting plate has a third slot for the first locking member to pass through.

[0019] In one embodiment, at least a portion of the hole wall of the first through hole is surrounded by a boss that projects outwardly from the backrest portion, the boss gluingly engages with two opposing walls, and the boss is provided with a guide groove for a drive pin to pass through.

[0020] In one embodiment, the headrest has a plurality of positioning heights, and the child seat further includes a second locking device disposed between the headrest and the backrest portion and configured to lock the headrest at any of the positioning heights, and when the headrest is at any of the positioning heights, a loosened top tether enables the first locking member to lock the headrest.

[0021] In the child car seat according to the above embodiment of the present application, when in use, if the top tether is not engaged with the anchor point of the vehicle, or the top tether is engaged with the anchor point of the vehicle but not tensioned, the first locking member of the first locking device can lock the headrest under the action of the first elastic member to make the positioning height of the headrest unadjustable, which can prompt the parent to check whether the top tether is engaged with the anchor point of the vehicle and whether the top tether is tensioned. After the top tether is properly installed, the tensioned top tether can drive the first locking member to unlock the headrest. In this case, the parent can adjust the height of the headrest according to the actual requirements. In the present application, by relating the tension of the top tether with the height adjustment of the headrest, the parent can easily find and solve the problem that the top tether is not properly installed when adjusting the position of the headrest, thereby improving the use reliability of the child car seat.

[0022] In one embodiment, the locking device is a third locking device including a third locking member and a third elastic member, the third locking member being switchable between a locking position for locking the safety belt and an unlocking position for unlocking the safety belt, the third elastic member acting on the third locking member to hold the third locking member in the locked position, and the top tether configured to act on the third locking member when tensioned such that the third locking member overcomes the force of the third elastic member and switches from the locked position to the unlocked position.

[0023] In one embodiment, the third locking member is provided with a first pivot axis, and the third locking member is switchable between a locked position and an unlocked position by rotating about the first pivot axis.

[0024] In one embodiment, the safety belt includes a shoulder belt and an adjustment belt connected to each other, the adjustment belt enabling the child to be tightened when the shoulder belt is pulled outward, the third locking member is provided with a pressing portion and an abutment portion, the pressing portion is adapted to be driven by the top tether to rotate about the first pivot axis, and the abutment portion locks the safety belt by abutting against the adjustment belt.

[0025] In one embodiment, the abutment is provided with a toothed portion adapted to engage with the adjustment belt.

[0026] In one embodiment, the toothed portion includes ratchet teeth.

[0027] In one embodiment, a first end of the top tether is connected to a fixed point and a second end of the top tether is configured to be connected to an anchor point of the vehicle, and a third locking member is disposed proximate to the first end of the top tether, and when tension is applied to the top tether, the top tether presses against the pressing portion to rotate the third locking member from a locked position to an unlocked position.

[0028] In one embodiment, the third locking device further comprises a connecting rod arranged parallel to the first pivot axis, the connecting rod forming a fixing point, and a first end of the top tether is provided with a first ring for sleeved the connecting rod.

[0029] In one embodiment, a first end of the top tether is coupled to the pressing portion and a second end of the top tether is configured to be coupled to an anchor point of the vehicle.

[0030] In one embodiment, the pressing portion is provided with a second mounting hole, and the first end of the top tether is provided with a second ring that passes through the second mounting hole.

[0031] In one embodiment, the first locking member further includes a bracket, the bracket including a bottom plate and a first side plate and a second side plate facing each other, both ends of the first pivot shaft are connected to the first side plate and the second side plate, respectively, the third elastic member is a torsion spring that sleeves the first pivot shaft, and when the third locking member is located in the locking position, the adjustment belt is clamped between the abutment portion and the bottom plate.

[0032] In one embodiment, the safety belt includes a shoulder belt and an adjustment belt connected to each other, the adjustment belt allowing the child to be tightened when the shoulder belt is pulled outward, the seat housing includes a seat portion and a backrest portion, the adjustment belt extends from a front end of the seat portion, and a top tether extends from an upper portion of the backrest portion, the front end of the seat portion is further provided with a fourth locking device including a fourth locking member, the fourth locking member being switchable between a locking position for locking the adjustment belt and an unlocking position for unlocking the adjustment belt, the third locking device is located rearward of the fourth locking device, and the third locking member of the third locking device is configured to lock or unlock the adjustment belt.

[0033] In the child car seat according to the above embodiment of the present application, when the top tether is engaged with the anchor point of the vehicle and tensioned, the first locking member of the first locking device can unlock the safety belt, and the parent can adjust the safety belt as necessary. However, when the top tether is not tensioned, the safety belt can be locked by the first locking member of the first locking device, making the safety belt unadjustable, which can prompt the parent to check whether the top tether is engaged with the anchor point of the vehicle and whether the top tether is tensioned, so as to effectively prevent the problem of the top tether not being properly installed when the child car seat is used, thereby improving the use reliability of the child car seat. [Brief description of the drawings]

[0034] [Figure 1] 1 shows a schematic perspective view of a child car seat according to a first embodiment and a second embodiment of the present application, with the headrest at a positioning height; [Diagram 2] 3A-3D show schematic perspective views of a child car seat according to a first and a second embodiment of the present application, with the headrest at different positioning heights; [Diagram 3] 1A and 1B are schematic perspective views of a headrest in a child car seat according to a first embodiment and a second embodiment of the present application; [Figure 4] 1 shows a schematic cross-sectional view of a child car seat according to a first embodiment of the present application; [Diagram 5] 5 is an enlarged view of the area marked A in FIG. 4, with the first locking member in the locked position. [Figure 6] 5 is an enlarged view of the area marked A in FIG. 4, with the first locking member in an unlocked position. [Figure 7] 2 shows a schematic cross-sectional view of a child seat according to a second embodiment of the present application; [Figure 8] 8 is an enlarged view of the area marked B in FIG. 7, with the first locking member in the locked position. [Figure 9]2 shows a schematic rear view of a child car seat according to a second embodiment of the present application; [Figure 10] FIG. 10 is an enlarged view of the area marked C in FIG. [Figure 11] 2 shows a schematic partial exploded view of a child seat according to a second embodiment of the present application; [Figure 12] FIG. 13 shows a schematic front view of a child car seat according to a fourth embodiment of the present application; [Figure 13] 1 shows a schematic perspective view of a child seat according to a fourth embodiment of the present application, without the shoulder belts shown; [Figure 14] 5 shows a schematic cross-sectional view of a child seat according to a fourth embodiment of the present application, without the shoulder belts shown; [Figure 15] FIG. 15 is an enlarged view of the area marked D in FIG. 14 with the first locking member in the locked position. [Figure 16] FIG. 13 shows a schematic exploded view of a first locking device in a child seat according to a fourth embodiment of the present application; [Figure 17] FIG. 15 is an enlarged view of the area marked D in FIG. 14 with the first locking member in the unlocked position. [Figure 18] 5 shows a schematic cross-sectional view of a child seat according to a fifth embodiment of the present application, without the shoulder belts shown; [Figure 19] FIG. 19 is an enlarged view of the area marked E in FIG. [Figure 20] FIG. 13 shows a schematic exploded view of a first locking device in a child seat according to a fifth embodiment of the present application; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0035] 1 to 6 show a child car seat 100 according to a first embodiment of the present application, which may include a seat housing 1, a headrest 2, a top tether 3, a safety belt (not shown), and a locking device. In this embodiment, the locking device is a first locking device 4.

[0036] 1 and 2, the seat housing 1 is configured in the shape of a seat for accommodating a child, and may be selectively mounted, for example, forward-facing or rearward-facing on a vehicle seat (not shown). Alternatively, in other embodiments, the seat housing 1 may be mounted only forward-facing on the vehicle seat. The seat housing 1 includes a seat portion 11 and a backrest portion 12. Armrests may be provided on both sides of the seat portion 11. In some embodiments, the seat housing 1 may be provided with a seat cushion and / or a backrest cushion to provide comfort and / or additional safety to a child seated therein.

[0037] 1 and 2, the headrest 2 is arranged on the backrest 12 so as to be height-adjustable to accommodate the seating height of the child in the seat housing 1. Referring to FIG. 3, the headrest 2 may include, for example, a pillow 21 and a hanging plate 22. The pillow 21 may be provided with, for example, an elastic material having a cushioning and energy absorbing effect, and the hanging plate 22 fits smoothly with the backrest 12. In combination with known technology, the height of the headrest 2 may be controlled by a height adjustment device (not shown) arranged between the headrest 2 and the backrest 12, and the height adjustment device provides the headrest 2 with a plurality of positioning heights. The height adjustment device may include, for example, a second locking device (not shown) arranged between the backrest 12 and the hanging plate 22 of the headrest 2. When the second locking device is in an unlocked state, the headrest 2 may move up and down in the height direction H along the backrest 12. When the headrest 2 is moved to the appropriate positioning height, the second locking device switches to a locked state, and the headrest 2 can be positioned at the positioning height. In general, the second locking device includes a locking pin and a plurality of positioning holes respectively arranged in the headrest 2 and the backrest portion 12. The plurality of positioning holes are spaced apart in the height direction H. Through the cooperation between the locking pin and the different positioning holes, the headrest 2 can be fixed at different positioning heights. The plurality of positioning heights of the headrest 2 are also generally referred to as a plurality of height adjustment gears of the headrest 2.

[0038] 1 and 4, a first end 301 of the top tether 3 may extend into the backrest portion 12, and a second end 302 of the top tether 3 may extend from the top of the backrest portion 12 and may include a hook 31. The hook 31 is configured to directly or indirectly engage with an anchor point of the vehicle. The length of the top tether 3 may be adjusted, for example, via an adjustment buckle 32. After the top tether 3 is engaged with the anchor point of the vehicle, tension can be easily applied to the top tether 3 via the adjustment buckle 32, so that the top tether 3 serves to fix the seat housing 1.

[0039] 4 to 6, the first locking device 4 is attached to the backrest portion 12 and includes a first locking member 41 and a first elastic member 42. The first locking member 41 can be switched between a locking position for locking the headrest 2 and an unlocking position for unlocking the headrest 2. When the first locking member 41 is in the locking position, the height of the headrest 2 cannot be adjusted. When the first locking member 41 is in the unlocking position, the height of the headrest 2 can be adjusted. The first elastic member 42 acts on the first locking member 41 to hold the first locking member 41 in the locking position. The top tether 3 is operably connected to the first locking member 41 such that the first locking member 41 can be moved when the top tether 3 moves. More specifically, when the top tether 3 is tensioned by pulling the top tether 3 upward, the top tether 3 may drive and move the first locking member 41 such that the first locking member 41 overcomes the force of the first elastic member 42 and switches from the locked position to the unlocked position, thereby allowing the height of the headrest 2 to be adjusted. It will be understood that when the tensioned state of the top tether 3 is released, the first locking member 41 may automatically switch from the unlocked position to the locked position under the action of the first elastic member 42, and the slackened top tether 3 may be pulled downward by the first locking member 41.

[0040] From the above, it can be seen that the first locking device 4 can be an additional locking device that can lock or unlock the headrest 2 based on the height adjustment device for adjusting the height of the headrest 2. The position of the first locking member 41 of the first locking device 4 is related to whether the top tether 3 is tensioned or not. In other words, even if the second locking device of the height adjustment device is in the unlocked state, when the top tether 3 is not tensioned so that the first locking member 41 is in the locking position for locking the headrest 2, the height of the headrest 2 still cannot be adjusted. It can be seen that after the top tether 3 is tensioned, the first locking member 41 unlocks the headrest 2 and no longer prevents the movement of the headrest 2. In this case, the positioning height of the headrest 2 may be adjusted by unlocking the second locking device, or the headrest 2 may be locked by the second locking device at any positioning height.

[0041] In the prior art, when using a child seat, due to the complexity of the operations for fixing the child seat in the vehicle seat and restraining the child in the child seat, an inexperienced parent may forget to tension the top tether or even forget to engage the top tether with the anchor point. In this case, the top tether that is not properly attached cannot fix the child seat. As a result, the child seat cannot reliably protect the child.

[0042] During the use of the child seat 100 according to the embodiment of the present application, when a child is seated in the child seat 100, the parent generally needs to adjust the height of the headrest 2 to a suitable positioning height. If the top tether 3 is not connected to the anchor point of the vehicle or tensioned, the first locking member 41 continues to lock the headrest 2. In this case, even if the second locking device is in the unlocked position, the parent may find that the positioning height of the headrest 2 cannot be adjusted, which may prompt the parent to find the reason why the height of the headrest 2 cannot be adjusted. For example, by reading the instruction manual or by the warning label of the child seat 100, the parent can easily know that the adjustment of the positioning height of the headrest 2 is related to whether the top tether 3 is tensioned or not, so as to check the installation and tensioning state of the top tether 3, which can effectively prevent the potential safety hazard caused by the top tether 3 not being connected to the anchor point of the vehicle or not being tensioned after being connected to the anchor point of the vehicle, thereby improving the use reliability of the child seat.

[0043] 3, 5, and 6, the first locking member 41 can lock the headrest 2 in many ways. For example, in this embodiment, the headrest 2 is provided with a plurality of locking holes 20 in the height direction H of the headrest 2. The plurality of locking holes 20 are arranged, for example, in the hanging plate portion 22 of the headrest 2. The center lines of the locking holes 20 intersect with the height direction H. In some embodiments, for example, the center lines of the locking holes 20 are perpendicular to the height direction H. The backrest portion 12 is provided with a first through hole 120. The first locking member 41 is, for example, a locking pin that slides into the first through hole 120. When the first locking member 41 is in the locking position (see FIG. 5), the first locking member 41 is inserted into the corresponding locking hole 20 to lock the headrest 2 so as to limit the height adjustment of the headrest 2. When the first locking members 41 are in the unlocked position (see FIG. 6), the first locking members 41 slip out of the corresponding locking holes 20 to unlock the headrest 2 so as to allow the height of the headrest 2 to be adjusted.

[0044] The number of the locking holes 20 may be set to two, three, or more as required. In some embodiments, the hanging plate portion 22 of the headrest 2 is provided with a plurality of locking holes 20. The plurality of locking holes 20 correspond to the height adjustment gears of the headrest 2, respectively, so that when the headrest 2 is at any positioning height, the second locking device can lock the movement of the headrest 2 in the height direction H relative to the backrest portion 12, and the loosened top tether 3 allows the first locking member 41 of the first locking device 4 to be inserted into the corresponding locking hole 20, so that the first locking device 4 can also lock the movement of the headrest 2 in the height direction H relative to the backrest portion 12. In this way, when the headrest 2 is at any height adjustment gear, the height of the headrest 2 can be adjusted by unlocking the second locking device. However, if the height of the headrest 2 cannot be adjusted after the second locking device is unlocked, it can be seen that the headrest 2 may be locked by the first locking device 4, in which case the top tether 3 may not be connected to an anchor point in the vehicle and / or the top tether 3 is not tensioned.

[0045] 5 and 6 again, a preferred embodiment of the first elastic member 42 is shown. The first elastic member 42 may be a spring that is located in the first through hole 120 and sleeves the first locking member 41. A first step 1201 for restricting an end of the first elastic member 42 may be provided on the wall of the first through hole 120, and a second step 411 for restricting the other end of the first elastic member 42 may be provided around the first locking member 41. The first elastic member 42 is sandwiched between the first step 1201 and the second step 411.

[0046] 5 and 6, in this embodiment, the top tether 3 is operably connected to the first locking member 41 by a flexible connector 5. The connector 5 may be, for example, a flexible belt or a flexible chain. The flexible belt may be, for example, a braided belt, and the flexible chain is, for example, a metal chain. A first end of the connector 5 is connected to the first end 301 of the top tether 3, for example, via a first hook-like member (not labeled in the figures), and a second end of the connector 5 is connected to a connecting ring 4101 on the first locking member 41, for example, via a second hook-like member (not labeled in the figures), and the connector 5 is connected between the top tether 3 and the first locking member 41 in a curved shape. It will be appreciated that when the top tether 3 connected to an anchor point of the vehicle is tensioned, the first end 301 of the top tether 3 moves upward and exerts a tensile force F1 on the connector 5, which moves with the top tether 3 and exerts a tensile force F2 on the first locking member 41, causing the first locking member 41 to move from the locked position in Figure 5 to the unlocked position in Figure 6. When the top tether 3 is in a slack state, the first elastic member 42 can drive the first locking member 41 to move from the unlocked position shown in Figure 6 to the locked position shown in Figure 5.

[0047] 4 and 5, an angle is formed between the tensile force F1 and the tensile force F2, and the connector 5 is curved accordingly. In order to reduce the wear caused by the contact between the curved connector 5 and the end of the first through hole 120, in some embodiments, the end of the first through hole 120 is provided with an arc-shaped structure 1202 for contacting the connector 5. The arc-shaped structure 1202 may be made of a material with a small coefficient of friction and wear resistance. In addition, since both ends of the connector 5 are hooked to the first locking member 41 and the top tether 3, respectively, if the connector 5 is damaged, it can be easily replaced with a new connector 5. Alternatively, in other embodiments, the connector 5 may also be connected to the top tether 3 and the first locking member 41 in any other suitable manner. Alternatively, in some embodiments, the connector 5 may not be provided, and the top tether 3 is directly connected to the first locking member 41, for example.

[0048] 1 to 3 and 7 to 11 show a child car seat 100 according to a second embodiment of the present application, including a seat housing 1, a headrest 2, a top tether 3, and a first locking device 4. This embodiment differs from the first embodiment mainly in that the top tether 3 is operably connected to the first locking member 41. The structures and connection relationships between the components in this embodiment can be obtained without contradiction by referring to the description of the first embodiment above. Therefore, the contents of this embodiment that are the same as or similar to those of the first embodiment will not be described in detail again here.

[0049] 8 and 9, the first end 301 of the top tether 3 is connected to the slider 6, and the second end 302 of the top tether 3 extends from the top of the backrest 12 and is connected to an anchor point of the vehicle. With reference to FIGS. 10 and 11, the slider 6 is a plate-like structure, and the upper part of the slider 6 is provided with, for example, a belt hole 63, and the first end 301 (see FIG. 9) of the top tether 3 may be sewn to the top tether 3 after being inserted into the belt hole 63. The slider 6 slides with the backrest 12 so as to be movable up and down, and a predetermined angle is formed between the moving direction of the slider 6 and the moving direction of the first locking member 41. The predetermined angle is, for example, 90°. The first locking device 4 further includes a motion steering mechanism 43. The motion steering mechanism 43 is coupled between the slider 6 and the first locking member 41 and configured to convert the upward movement of the slider 6 into the movement of the first locking member 41 from the locked position to the unlocked position. More specifically, referring to Fig. 8 to Fig. 10 together, when the top tether 3 is tensioned, the slider 6 moves upward under the tensile force F3 of the top tether 3 and applies an axial force F4 to the first locking member 41 via the motion steering mechanism 43, thereby moving the first locking member 41 from the locked position shown in Fig. 8 to the unlocked position (not shown). When the top tether 3 is in a slack state, the first elastic member 42 can drive the first locking member 41 to move from the unlocked position to the locked position shown in Fig. 8. For example, the first locking member 41 may convert its own movement from an unlocked position to a locked position into a downward movement of the slider 6 via the motion steering mechanism 43 .

[0050] 9 and 10, in this embodiment, a sliding limiting structure 7 is further disposed between the backrest portion 12 and the slider 6 to limit the range of vertical movement of the slider 6 so as to prevent damage to the first locking member 41 caused by excessive movement of the slider 6. In some embodiments, the sliding limiting structure 7 may include a first slot 71 and a pin 72. The first slot 71 may be disposed on the slider 6. The pin 72 may be attached to the backrest portion 12 and may be slidably fitted with the first slot 71. The first slot 71 defines the range of vertical movement of the slider 6. The fitting of the first slot 71 and the pin 72 may guide the sliding of the slider 6. It will be understood that the slider 6 and the backrest portion 12 may be slidably fitted with each other in many ways, and the range of sliding of the slider 6 may be limited in many forms. For example, in an embodiment not shown, a sliding slot that slides over the slider 6 may be provided in the backrest portion 12, and stoppers for stopping the slider 6 may be provided at both ends of the sliding slot.

[0051] Referring to FIG. 10, the child car seat 100 may further include a second elastic member 8. The second elastic member 8 is connected between the backrest portion 12 and the slider 6. When the top tether 3 is pulled upward to apply tension, the slider 6 moves upward, and the second elastic member 8 applies a downward force to the slider 6. It will be understood that when the top tether 3 changes from tension to slack, the second elastic member 8 directly drives the slider 6 to slide downward. The first elastic member 42 may be mainly configured to ensure that the first locking member 41 smoothly returns to the locking position by being inserted into the locking hole 20 so as to limit the height adjustment of the headrest 2. In this embodiment, the second elastic member 8 may be a spring. For the convenience of fixing the second elastic member 8, a second through hole 68 may be arranged on the slider 6, and a hook-shaped cantilever 18 may be arranged on the backrest portion 12. The hook-shaped cantilever 18 is located below the second through-hole 68, and both ends of the second elastic member 8 can be connected to the second through-hole 68 and the hook-shaped cantilever 18, respectively.

[0052] 8, 10 and 11, a preferred embodiment of the motion steering mechanism 43 is shown, including a raised portion 431 and a drive pin 432. The raised portion 431 may be attached to the slider 6 or may be integrally formed therewith, and the drive pin 432 may be attached to the first locking member 41 or may be integrally formed therewith. The raised portion 431 is provided with a raised inclined portion 4310 that extends away from the backrest portion 12. The slider 6 is provided with a second slot 60, and the first locking member 41 passes through the second slot 60. The drive pin 432 abuts against the raised inclined portion 4310. In this way, when the slider 6 moves upward, different positions of the rising inclined portion 4310 contact the driving pin 432, so that the driving pin 432 drives the first locking member 41 to exit the locking hole 20 and reach the unlocked position. Conversely, when the slider 6 moves downward, the rising inclined portion 4310 allows the first locking member 41 to be inserted into the corresponding locking hole 20 and reach the locked position. Alternatively, there may be many implementation forms of the motion steering mechanism 43, however, the up and down movement of the slider 6 corresponds to the axial movement of the first locking member 41 along the first through hole 120 so that the headrest 2 can be unlocked or locked.

[0053] 10 and 11, in this embodiment, the axial direction of the drive pin 432 is approximately perpendicular to the axial direction of the first locking member 41. The first locking member 41 is provided with, for example, a first hole 410, and the center of the drive pin 432 is located in the first hole 410 so that the drive pin 432 is attached to the first locking member 41. Also, in this embodiment, the rising portion 431 can be disposed on the mounting plate 9. The mounting plate 9 is provided with, for example, a fixing hole 91. The slider 6 is provided with, for example, a first mounting hole 64. The mounting plate 9 is fixedly connected to the slider 6 via, for example, a fastener 69 inserted into the fixing hole 91 and the first mounting hole 64 so that the rising portion 431 is attached to the slider 6.

[0054] 10 and 11, in this embodiment, the raised portion 432 may be formed by a U-shaped rib arranged on the mounting plate 9, with the raised sloped portion 4310 formed on two opposing walls 4311 of the U-shaped rib, which passes through the second slot 60. The mounting plate 9 is provided with a third slot 90 for the first locking member 41 to pass through. The third slot 90 corresponds to an inner region of the U-shaped rib, such that the first locking member 41 is located between the two opposing walls 4311 of the U-shaped rib. In order to prevent the problem that the drive pin 432 cannot continue to abut against each rising inclined portion 4310 due to undesirable rotation of the first locking member 41, both ends of the drive pin 432 abut against the rising inclined portions 4310 of the two opposing wall bodies 4311, respectively, so that the drive pin 432 always moves along the rising inclined portions 4310 in the axial direction of the first locking member 41 to drive the first locking member 41 to come out of the locking hole 20 and unlock the headrest 2 when tension is applied to the top tether 3, or to insert the first locking member 41 into the locking hole 20 to lock the headrest 2 when the top tether 3 is loosened.

[0055] 10 and 11 again, in order to allow the first through-hole 120 to have a sufficient axial length for mounting the first locking member 41 and at the same time prevent an excessively thick housing wall of the backrest portion 12, in this embodiment, at least a part of the hole wall of the first through-hole 120 is formed by a boss 1204 protruding outward from the backrest portion 12, the boss 1204 penetrates the third elongated hole 90, and the boss 1204 may be provided with a guide groove 1205. Both ends of the drive pin 432 pass through the corresponding guide grooves 1205, respectively, and abut against the rising inclined portions 4310 on the two opposing wall bodies 4311. It will be understood that the sliding engagement between the drive pin 432 and the guide groove 1205 can also prevent undesired rotation of the first locking member 41 and ensure reliable contact between the drive pin 432 and the rising inclined portions 4310. Referring to FIG. 11, in some embodiments, the boss 1204 may include sections 1203 that slide with two opposing walls 4311, respectively, which may also guide the up and down movement of the slider 6.

[0056] The present application further provides a third embodiment of the child car seat 100, not shown. The third embodiment is mainly different from the second embodiment in that the rising portion 431 and the slider 6 are integrally formed. The structure and connection relationship between the components in this embodiment can be obtained without contradiction by referring to the description of the second embodiment. Therefore, the contents of this embodiment that are the same as or similar to those of the second embodiment will not be described in detail again here.

[0057] It will be appreciated that since the raised portion 431 and the slider 6 are of one-piece construction, the mounting plate 9 and the fasteners 69, the fixing holes 91, the third slot 90, and other structures associated with the mounting plate 9 may be omitted. The raised portion 431 may be formed of a U-shaped rib, and the raised ramps 4310 are formed on two opposing walls 4311 of the U-shaped rib. In this embodiment, the U-shaped rib may be disposed around the second slot 60, and the boss 1204 passes through the second slot 60, such that the drive pin 432 extending from the guide groove 1205 of the boss 1204 abuts against the raised ramps 4310. As in the second embodiment, when the top tether 3 is tensioned, the slider 6 can move upward under the tensile force F3 of the top tether 3, and under the cooperation of the driving pin 432 and the rising ramp 4310, the first locking member 41 overcomes the elastic force of the first elastic member 42 and moves from the locking position shown in Fig. 8 to the unlocked position (not shown) so as to allow the height adjustment of the headrest 2. When the top tether 3 is in a slack state, the first elastic member 42 can drive the first locking member 41 to move from the unlocked position to the locking position shown in Fig. 8, and under the cooperation of the driving pin 432 and the rising ramp 4310 and the action of the elastic restoring force of the second elastic member 8, the sliding member 6 can move downward so as to still be able to move upward to drive the first locking member 41 to unlock the headrest 2 when the top tether 3 is next tensioned.

[0058] Figures 12 to 17 show a child seat 100 according to a fourth embodiment of the present application, including a seat housing 1, a headrest 2, a safety belt 40, a top tether 3, a third locking device 50 and a fourth locking device 70.

[0059] 12 and 13, the seat housing 1 is configured in the shape of a seat for accommodating a child, and can be selectively mounted, for example, on a vehicle seat (not shown) in a forward or rearward direction. Alternatively, in other embodiments, the seat housing 1 may be mounted only forward on the vehicle seat. It will be understood that when the seat housing 1 is mounted forward on the vehicle seat, the line of sight of the child accommodated therein faces the front of the vehicle, and when the seat housing 1 is mounted rearward on the vehicle seat, the line of sight of the child accommodated therein faces the rear of the vehicle. It should be noted that the orientation terms "front" and "rear" in this embodiment refer to the front and rear when the seat housing 1 is mounted forward. In FIG. 14, the arrow F indicates the forward direction, and the arrow R indicates the reverse direction. These terms are intended only to clearly illustrate the solutions of the embodiments of the present application, and are not intended to inappropriately limit the present application. The seat housing 1 includes a seat portion 11 and a backrest portion 12. Armrests may be provided on both sides of the seat portion 11. In some embodiments, the seat housing 1 may be provided with a seat cushion and / or a back cushion to provide comfort and / or additional safety for a seated child.

[0060] Referring to FIG. 12, the safety belt 40 is attached to the seat housing 1. The safety belt 40 includes, for example, a shoulder belt 401 and an adjustment belt 402 connected to each other. Generally, two shoulder belts 401 are provided. The two shoulder belts 401 correspond to the two shoulders of the child. The front sides of the two shoulder belts 401 are releasably engaged with the crotch belt 23 of the child seat via, for example, a buckle 25 so as to restrain the child in the seat housing 1. The rear sides of the two shoulder belts 401 pass through shoulder belt holes 420 at the upper part of the backrest portion 12, respectively, and then extend downward behind the backrest portion 12 and can be connected to the end of the adjustment belt 402 via any suitable connection mechanism (not shown). Referring to FIG. 13 and FIG. 14 together, the other end of the adjustment belt 402 extends forward at the bottom of the seat portion 11 and passes through a fourth locking device 70 arranged at the front end of the seat portion 11. In some embodiments, by unlocking the fourth locking device 70, the shoulder belt 401 can be pulled outward (in this case, the adjustment belt 402 retracts into the seat part 11), thereby lengthening the use section of the shoulder belt 401 (the portion of the shoulder belt 401 used for contact with the child), making it easier for the child to sit down. After the child sits down, the shoulder belt 401 is engaged with the crotch belt 23 via the buckle 25, and the adjustment belt 402 is pulled outward, whereby the shoulder belt 401 tightens around the child and securely restrains the child within the seat housing 1.

[0061] 14, in some embodiments, the fourth locking device 70 may include a fourth locking member 701 and a fourth elastic member 702. When the fourth locking device 70 is in a locked state, the fourth locking member 701 abuts against the adjustment belt 402 to limit movement of the adjustment belt 402 in at least one direction (e.g., the direction of retracting into the seat portion 11). The fourth elastic member 702 is configured to hold the fourth locking member 701 in a locked position in contact with the adjustment belt 402.

[0062] For example, in some embodiments, the fourth locking member 701 may include ratchet teeth (not shown) and a second pivot shaft 710, and the fourth elastic member 702 may be a torsion spring. Under the action of the fourth elastic member 702, the ratchet teeth of the fourth locking member 701 abut against the adjustment belt 402, thereby pulling the adjustment belt 402 outward from the seat portion 11, allowing tension to be applied to the shoulder belt 401, and preventing accidental loosening of the shoulder belt 401 by not allowing the adjustment belt 402 to retract into the seat portion 11 by pulling the shoulder belt 401. When the shoulder belt 401 needs to be loosened, the fourth locking device 70 can be controlled to be in an unlocked state by pressing the fourth locking member 701, so that the fourth locking member 701 overcomes the action of the fourth elastic member 702 and does not abut against the adjustment belt 402. In this case, the shoulder belt 401 can be easily pulled, which causes the adjustment belt 402 to retract into the seat portion 11, and the use section of the shoulder belt 401 becomes longer. Alternatively, in other embodiments, the fourth locking device 70 may also have other implementation forms. For example, when the fourth locking device 70 is in a locked state, neither outward pulling movement nor inward retracting movement of the adjustment belt 402 is allowed. The structures of the safety belt 40 and the fourth locking device 70 largely involve known techniques, and therefore will not be described in detail again here.

[0063] 13 and 14, the top tether 3 is attached to the seat housing 1. In some embodiments, a first end 301 of the top tether 3 is connected to any suitable position of the seat housing 1, and a second end 302 of the top tether 3 may extend from the top of the backrest portion 12 and may include a hook 31. The hook 31 is configured to directly or indirectly engage with an anchor point of the vehicle. The length of the top tether 3 may be adjusted, for example, via an adjustment buckle 32. After the top tether 3 is engaged with the anchor point of the vehicle, tension can be easily applied to the top tether 3 via the adjustment buckle 32, thereby allowing the top tether 3 to secure the seat housing 1.

[0064] 15 to 17, the third locking device 50 is disposed on the path of the adjustment belt 402 so as to act on the adjustment belt 402. Specifically, the third locking device 50 may include a third locking member 501 and a third elastic member 502. Referring to FIG. 15, when the third locking device 50 is in the locked state, the third locking member 501 is in a locked position for locking the adjustment belt 402. Referring to FIG. 17, when the third locking device 50 is in the unlocked state, the third locking member 501 is in an unlocked position for unlocking the adjustment belt 402. The third elastic member 502 acts on the third locking member 501 to hold the third locking member 501 in the locked position. The third locking member 501 is associated with the top tether 3. The top tether 3 is configured to act on the third locking member 501 when tensioned, causing the third locking member 501 to switch from the locked position to the unlocked position by overcoming the force of the third elastic member 502. It will be appreciated that when the top tether 3 is in a slack state, the third locking member 501 may automatically switch from the unlocked position to the locked position under the action of the third elastic member 502.

[0065] With reference to FIG. 14, it should be noted that the third locking device 50 may be an additional locking mechanism that can act on the adjustment belt 402, added to the child car seat 100 based on the fourth locking device 70. For example, the third locking device 50 is located behind the fourth locking device 70 on the seat part 11. The position of the third locking member 501 of the third locking device 50 is related to whether the top tether 3 is tensioned or not. More specifically, even if the fourth locking device 70 is in an unlocked state, when the third locking member 501 is in a locked position due to the top tether 3 not being tensioned, at least one of the outward pulling movement and the inward retracting movement of the adjustment belt 402 relative to the seat part 11 may be limited by the third locking device 50.

[0066] For example, in some embodiments, when the third locking member 501 is in the locked position, the third locking device 50 can simultaneously restrict the outward pulling movement and the inward retracting movement of the adjustment belt 402. In this case, even if the fourth locking device 70 is in the unlocked state, the shoulder belt 401 is still in an unadjustable state. In some other embodiments, when the third locking member 501 is in the locked position, the third locking device 50 allows the adjustment belt 402 to be pulled outward to shorten the use section of the shoulder belt 401, but does not retract the adjustment belt 402 inward. In some other embodiments, when the third locking member 501 is in the locked position, the third locking device 50 does not allow the adjustment belt 402 to be pulled outward, but allows the shoulder belt 401 to be pulled to retract the adjustment belt 402 inward, thereby lengthening the use section of the shoulder belt 401.

[0067] 17, it can be seen that when the top tether 3 is tensioned, the top tether 3 acts on the third locking member 501, causing the third locking member 501 to overcome the force of the third elastic member 502 and switch from the locked position to the unlocked position. In this case, the third locking member 501 does not restrict the outward pulling movement and the inward retracting movement of the adjustment belt 402, and the parent can decide whether to operate the fourth locking device 70 to adjust the shoulder belt 401 as needed.

[0068] In the prior art, when using a child seat, due to the complexity of the operation of fixing the child seat in the vehicle seat and restraining the child in the child seat, an inexperienced parent may forget to tension the top tether or even forget to engage the top tether with the anchor point. In this case, the top tether that is not properly attached cannot fix the child seat. As a result, the child seat cannot reliably protect the child.

[0069] 12, 15, and 17, when a child sits in the child seat 100 equipped with the third locking device 50 according to an embodiment of the present application, a parent generally needs to adjust the use section of the shoulder belt 401. Generally, the shoulder belt 401 is first pulled to lengthen the use section of the shoulder belt 401, so that the shoulder belt 401 can be easily put on the child, and then the adjustment belt 402 is pulled, so that the shoulder belt 401 fits snugly to the child. When the top tether 3 is not connected to an anchor point of the vehicle or the top tether 3 is not tensioned, the third locking member 501 continues to lock the adjustment belt 402. In this case, even if the fourth locking member 701 is in the unlocked position, the parent may find that the height of the shoulder belt 401 and / or the adjustment belt 402 still cannot be adjusted, which may prompt the parent to find the reason why the height of the shoulder belt 401 and / or the adjustment belt 402 cannot be adjusted. For example, by reading the instruction manual or through the warning label on the child seat 100, parents can easily know that the adjustment of the height of the shoulder belt 401 and / or the adjustment belt 402 is related to whether the top tether 3 is tensioned, so as to check the installation and tensioning status of the top tether 3, which can effectively prevent potential safety hazards caused by the top tether 3 not being connected to an anchor point of the vehicle or not being tensioned after being connected to an anchor point of the vehicle, thereby improving the use reliability of the child seat.

[0070] 15 to 17, a preferred embodiment of the third locking device 50 is shown. The third locking member 501 may have a first pivot shaft 5011. The third locking member 501 may be conveniently switched between a locked position and an unlocked position by rotating about the first pivot shaft 5011. The first pivot shaft 5011 and the third locking member 501 may be of one-piece construction or may be formed independently. In some embodiments, as shown in FIG. 16, the third locking member 501 is provided with a hole 5012, and the first pivot shaft 5011 is sleeved in the hole 5012. The third elastic member 502 may be, for example, a torsion spring that sleeves the first pivot shaft 5011 and acts on the third locking member 501. The third locking member 501 is provided with a pressing portion 5013 and an abutting portion 5014. The third locking member 501 is, for example, an integrally formed member. The pressing portion 5013 is configured to receive a driving force from the tensioned top tether 3 to drive the third locking member 501 to switch from the locking position to the unlocked position. When the third locking member 501 is in the locking position, the abutting portion 5014 abuts against the adjustment belt 402 to lock the adjustment belt 402. In this case, the adjustment belt 402 is sandwiched between the abutting portion 5014 and a wall body on the opposite side to the abutting portion 5014. Preferably, the abutting portion 5014 is provided with a toothed portion 5015 suitable for engagement with the adjustment belt 402, thereby increasing the frictional force between the abutting portion 5014 and the adjustment belt 402. In some embodiments, the toothed portion 5015 may be a ratchet tooth, which allows the adjustment belt 402 to be pulled outward or retracted inward when the third locking member 501 is in the locked position.

[0071] 15 and 17, in some embodiments, the first end 301 of the top tether 3 is connected to a fixed point 490, and the second end 302 of the top tether 3 is connected to an anchor point of the vehicle via a hook 31 as described above. The fixed point 490 is formed, for example, by a connecting rod 49 parallel to the first pivot axis 5011, and the first end 301 of the top tether 3 may be provided with a first ring 312, which is formed, for example, by sewing the top tether 3, and the first ring 312 sleeves the connecting rod 49, whereby the first end 301 of the top tether 3 is connected to the connecting rod 49. The third locking member 501 is disposed close to the first end 301 of the top tether 3, and a pressing portion 5013 of the third locking member 501 is located on the path of the top tether 3, and after the top tether 3 is tensioned, the third locking member 501 is driven to rotate from the locked position to the unlocked position by pressing the pressing portion 5013. It will be understood that in other embodiments, the implementation of the fixing point 490 is not limited to the connecting rod 49 as long as the first end 301 of the top tether 3 can be fixed.

[0072] Referring to FIG. 16, in some embodiments, the third locking device 50 may further include a bracket 503. The bracket 503 is connected to the seat housing 1. The bracket 503 includes a bottom plate 5033 and a first side plate 5031 and a second side plate 5032 facing each other. The bracket 503 is, for example, an integrally formed member. Both ends of the first pivot shaft 5011 are connected to the first side plate 5031 and the second side plate 5032, respectively. For example, both ends of the first pivot shaft 5011 are attached to the third through holes 50321 of the first side plate 5031 and the second side plate 5032. Both ends of the connecting rod 49 may also be connected to the first side plate 5031 and the second side plate 5032, respectively. For example, both ends of the connecting rod 49 are attached to the fourth through-holes 50322 of the first side plate 5031 and the second side plate 5032. The adjustment belt 402 is disposed through a space between the third locking member 501 and the bottom plate 5033. When the third locking member 501 is in the locking position, the bottom plate 5033 functions as a wall body facing the abutment portion 5014, and the adjustment belt 402 is sandwiched between the abutment portion 5014 and the bottom plate 5033 so as to prevent the adjustment belt 402 from moving in an undesirable direction. By disposing the bracket 503, the first pivot shaft 5011, the third locking member 501, the third elastic member 502, the connecting rod 49, etc. are attached to the bracket 503, and thus the third locking device 501 can be easily attached to any appropriate position of the child seat as a module. It will be appreciated that in other embodiments, the bracket 503 may not be provided and components such as the first pivot shaft 5011, the connecting rod 49, etc. are mounted directly on the seat housing 1.

[0073] 15, in this embodiment, the ratchet teeth of the toothed portion 5015 may be configured such that when the third locking member 501 is in the locked position, the third locking device 50 allows the adjustment belt 402 to be pulled outward, but does not allow the adjustment belt 402 to retract inward, similar to the fourth locking device 70. In this way, when a parent needs to pull the shoulder belt 401 to lengthen the use section of the shoulder belt 401, if the top tether 3 is not tensioned, the shoulder belt 401 cannot be pulled even if the fourth locking device 70 is unlocked, thereby indicating to the parent that the third locking device 50 is still locked and the top tether 3 is not tensioned. Alternatively, in other embodiments, the ratchet teeth of the toothed portion 5015 may be configured such that when the third locking member 501 is in the locked position, the third locking device 50 allows the adjustment belt 402 to retract inward, but does not allow the adjustment belt 402 to be pulled outward. In this way, after the shoulder belt 401 is put on the child, when the parent needs to pull the adjustment belt 402 outward to tighten the shoulder belt 401 around the child, the adjustment belt 402 cannot be pulled outward if the top tether 32 is not tensioned, thereby indicating to the parent that the third locking device 50 is still locked and the top tether 32 is not tensioned.

[0074] 18 to 20 show a child car seat 100 according to a fifth embodiment of the present application. This embodiment differs from the fourth embodiment mainly in the manner in which the first end 301 of the top tether 3 is connected. The structures and connection relationships between the components in this embodiment can be obtained without contradiction by referring to the description of the fourth embodiment. Therefore, the contents of this embodiment that are the same as or similar to those of the fourth embodiment will not be described in detail again here.

[0075] 19, in this embodiment, the first end 301 of the top tether 3 may be connected to the pressing portion 5013 of the third locking member 501, and the connecting rod 49 configured to position the first end 301 of the top tether 3 in the fourth embodiment may not be attached to the bracket 503. More specifically, the pressing portion 5013 of the third locking member 501 may be provided with a second mounting hole 50131, and the first end of the top tether is provided with a second ring 311 penetrating the second mounting hole 50131, and the second ring 311 is formed, for example, by sewing the top tether 3. It will be understood that when the top tether 3 is released, the third elastic member 502 holds the third locking member 501 in the locked position, and the adjustment belt 402 is sandwiched between the abutting portion 5014 of the third locking member 501 and the bottom plate 5033 of the bracket 503. When the top tether 3 is tensioned, the first end 301 of the top tether 3 can drive and rotate the pressing portion 5013, causing the third locking member 501 to rotate to an unlocked position so as not to affect the movement of the adjustment belt 402.

[0076] It should be noted that in the above embodiment, the third locking device 50 is disposed on the path of the adjustment belt 402 to lock or unlock the adjustment belt 402, but in other embodiments, the third locking device 50 may be disposed on the path of, for example, any shoulder belt 401 to lock or unlock the shoulder belt 401, which also helps parents to determine whether the top tether 3 is connected to an anchor point of the vehicle and whether the top tether 3 is tensioned. It will be understood that the embodiment in which the third locking device 50 is configured to lock / unlock the shoulder belt 401 also falls within the scope of protection of the present application.

[0077] In the child seat 100 according to the embodiment of the present application, when the top tether 3 is loosened, the third locking member 501 of the third locking device 50 is in a locking position for locking the shoulder belt 401 or the adjustment belt 402 of the safety belt 40, so that the safety belt 40 is in a locking state in which the length of the safety belt 40 cannot be arbitrarily adjusted. When a child is seated in the child seat 100, if a parent finds that the safety belt 40 cannot be adjusted as needed, the parent may first check whether the top tether 3 is properly installed, so as to quickly eliminate potential safety hazards caused by the top tether 3 not being connected to the anchor point of the vehicle or not being tensioned after being connected to the anchor point of the vehicle.

[0078] The technical features in the above embodiments may be combined randomly. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, all combinations of the technical features should be considered within the scope described herein unless they are mutually inconsistent.

[0079] The above embodiments only describe some implementations of the present application, and although the descriptions are specific and detailed, they therefore cannot be understood as limitations on the patent scope of the present application. It should be noted that those skilled in the art can further make modifications and improvements without departing from the concept of the present application, all of which are within the scope of protection of the present application. Therefore, the patent scope of the present application should be subject to the appended claims.

Claims

1. A seat housing; a headrest disposed in the seat housing so as to be height adjustable; a top tether extending from a top of the seat housing for connecting to an anchor point in a vehicle; a safety belt attached to the seat housing; a locking device disposed on the seat housing and including a locking member and an elastic member; A child seat comprising: The locking member is switchable between a locking position for locking one of the headrest and the safety belt and a release position for releasing the one of the headrest and the safety belt, and the elastic member acts on the locking member to hold the locking member at the locking position, A child seat, wherein the top tether is configured to act on the locking member when tension is applied, causing the locking member to overcome the force of the elastic member and switch from the locked position to the unlocked position.

2. the seat housing includes a backrest portion, the headrest is height-adjustably disposed on the backrest portion, the top tether extends from the top of the backrest portion, The locking device is a first locking device attached to the backrest portion and including a first locking member and a first elastic member, the first locking member being switchable between a locking position for locking the headrest and a release position for releasing the headrest, and the first elastic member acts on the first locking member to hold the first locking member in the locking position; the top tether is operably connected to the first locking member, the top tether being configured to drive the first locking member to move when tensioned such that the first locking member overcomes the force of the first elastic member to switch from the locked position to the unlocked position; 2. The child seat according to claim 1.

3. The headrest is provided with a plurality of locking holes in a height direction of the headrest, A first through hole is provided in the backrest portion, and the first engaging member slides into the first through hole; When the first locking member is in the locking position, the first locking member is inserted into the corresponding locking hole to limit the height adjustment of the headrest, and when the first locking member is in the unlocked position, the first locking member is removed from the corresponding locking hole to enable the height adjustment of the headrest.

3. A child seat as claimed in claim 2.

4. A first through hole is provided in the backrest portion, and the first engaging member slides into the first through hole; The first elastic member is a spring located in the first through hole and sleeves the first locking member.

4. A child seat according to claim 2 or 3.

5. A first end of the top tether is connected to the first locking member via a connector, and a second end of the top tether extends from the top of the backrest portion. A child seat according to any one of claims 2 to 4.

6. A first through hole is provided in the backrest portion, and the first engaging member slides into the first through hole; The connector includes a flexible belt or a flexible chain, and an end of the first through hole is provided with an arc-shaped structure for contacting the connector.

6. A child seat according to claim 5.

7. a first end of the top tether is connected to a slider, and a second end of the top tether extends from the top of the backrest portion; the slider slides on the backrest portion so as to be vertically movable, and a predetermined angle is formed between a moving direction of the slider and a moving direction of the first locking member; the first locking device further comprising a motion steering mechanism coupled between the slider and the first locking member and configured to translate upward movement of the slider into movement of the first locking member from the locked position to the unlocked position. A child seat according to any one of claims 2 to 6.

8. 8. The child seat according to claim 7, further comprising a slide limiting structure disposed between the backrest portion and the slider.

9. 9. The child seat according to claim 8, wherein the sliding limiting structure includes a first slot disposed in the slider, and a pin attached to the backrest portion and slidingly engaging with the first slot.

10. 10. A child seat as claimed in any one of claims 7 to 9, further comprising a second elastic member connected between the backrest portion and the slider, the second elastic member applying a downward force to the slider when the top tether is tensioned.

11. The slider is provided with a second slot through which the first locking member passes, The motion steering mechanism includes: a riser portion connected to the slider and having a riser slope portion extending away from the backrest portion; a drive pin connected to the first engaging member and abutting against the rising inclined portion; Including, A child seat according to any one of claims 7 to 10.

12. 12. The child seat of claim 11, wherein the axial direction of the drive pin is perpendicular to the axial direction of the first fastening member, and the drive pin is attached to or integrally formed with the first fastening member.

13. 13. The child seat according to claim 11 or 12, wherein at least a portion of a hole wall of the first through hole is surrounded by a boss protruding outward from the backrest portion.

14. The raised portion is formed of a U-shaped rib, and the raised slope portion is formed on two opposing walls of the U-shaped rib, the first engaging member is located between the two opposing wall bodies, and both ends of the drive pin abut against the rising inclined portions of the two opposing wall bodies, respectively; A child seat according to any one of claims 11 to 13.

15. the U-shaped rib is disposed on a mounting plate, the mounting plate being fixedly connected to the slider; the U-shaped rib passes through the second slot, and the mounting plate is provided with a third slot through which the first engaging member passes; 15. A child seat as claimed in claim 14.

16. At least a portion of the hole wall of the first through hole is surrounded by a boss protruding outward from the backrest portion, the boss slidingly engaging with the two opposing walls; The boss is provided with a guide groove through which the drive pin passes.

16. A child seat as claimed in claim 15.

17. The headrest has a plurality of positioning heights, the child seat further includes a second locking device, the second locking device being disposed between the headrest and the backrest and configured to lock the headrest at any one of the positioning heights; When the headrest is at one of the positioning heights, a loosened top tether allows the first locking member to lock the headrest. A child seat according to any one of claims 2 to 16.

18. the locking device is a third locking device including a third locking member and a third elastic member, the third locking member is switchable between a locking position for locking the safety belt and a locking release position for unlocking the safety belt, and the third elastic member acts on the third locking member to hold the third locking member in the locking position; the top tether is configured to act on the third locking member when tension is applied thereto, such that the third locking member overcomes the force of the third elastic member and switches from the locked position to the unlocked position. A child seat according to any one of claims 1 to 17.

19. 19. The child seat according to claim 18, wherein the third locking member is provided with a first pivot axis, and the third locking member is switchable between the locked position and the unlocked position by rotating around the first pivot axis.

20. the safety belt includes a shoulder belt and an adjustment belt connected to each other, the adjustment belt allowing the shoulder belt to tighten around the child when pulled outward; The third locking member is provided with a pressing portion and an abutting portion, the pressing portion is adapted to be driven by the top tether to rotate about the first pivot axis, and the abutting portion locks the safety belt by abutting against the adjustment belt.

20. A child seat as claimed in claim 19.

21. 21. A child seat as claimed in claim 20, wherein the abutment portion is provided with a toothed portion adapted to engage with the adjustment belt.

22. 22. The child seat of claim 21, wherein the toothed portion includes ratchet teeth.

23. A first end of the top tether is connected to a fixed point, and a second end of the top tether is configured to be connected to the anchor point of the vehicle; the third locking member is disposed adjacent to the first end of the top tether, and when tension is applied to the top tether, the third locking member presses the pressing portion to rotate the third locking member from the locking position to the unlocking position.

23. A child seat according to any one of claims 20 to 22.

24. 24. The child seat of claim 23, wherein the third locking device further comprises a connecting rod arranged parallel to the first pivot axis, the connecting rod forming the fixed point, and the first end of the top tether is provided with a first ring for sleeve-fitting the connecting rod.

25. 23. A child seat as described in any one of claims 20 to 22, wherein a first end of the top tether is connected to the pressing portion, and a second end of the top tether is configured to be connected to the anchor point of the vehicle.

26. 26. The child seat as described in claim 25, wherein a second mounting hole is provided in the pressing portion, and a second ring that passes through the second mounting hole is provided at the first end of the top tether.

27. The first locking member further includes a bracket, the bracket including a bottom plate and a first side plate and a second side plate opposed to each other, both ends of the first pivot shaft are connected to the first side plate and the second side plate, respectively, the third elastic member is a torsion spring that sleeves the first pivot shaft, and when the third locking member is located at the locking position, the adjustment belt is sandwiched between the abutment portion and the bottom plate.

27. A child seat according to any one of claims 20 to 26.

28. the safety belt includes a shoulder belt and an adjustment belt connected to each other, the adjustment belt allowing the shoulder belt to tighten around the child when pulled outward; The seat housing includes a seat portion and a backrest portion, the adjustment belt extends from a front end of the seat portion, and the top tether extends from an upper portion of the backrest portion, a fourth locking device including a fourth locking member is further provided at the front end of the seat portion, and the fourth locking member is switchable between a locking position for locking the adjustment belt and a release position for releasing the adjustment belt; The third locking device is located behind the fourth locking device, and the third locking member of the third locking device is configured to lock or unlock the adjustment belt.

28. A child seat according to any one of claims 18 to 27.

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