Child safety seat and its support assembly

Abstract

Providing a child safety seat and its support assembly. The support assembly (100) of the child safety seat includes: a base (1); a pivotable arm (21); a rebound bracket (2) including a first cross beam (22) disposed at an upper end of the pivotable arm (21), the lower end of which is pivotally connected to the base (1); a locking mechanism (4) disposed on the base (1); and a tension belt (3). A first end (31) of the tension belt (3) is connected to the base (1), a second end (32) functions as a pulling end, and an intermediate portion is configured to pass through the first cross beam (22) and the locking mechanism (4). The second end (32) of the tension belt (3) first passes through the first cross beam (22) and then passes through the locking mechanism (4), which locks the tension belt (3).

Description

Technical Field

[0001] This application claims the priority of Chinese Patent Application No. 202110491918.0, filed on May 6, 2021, This is the national phase in Japan of International Application No. PCT / EP2022 / 062348, filed on May 6, 2022, the title of which is "Child Safety Seat and Its Support Assembly", the entire content of which is incorporated herein by reference. This application relates to the field of child safety seats, and more particularly, to child safety seats and their support assemblies.

Background Art

[0002] A child safety seat is typically configured to be attached to a vehicle seat to ensure the safety of an infant during movement. A child safety seat includes a seat body and a support assembly. The seat body provides a restraint system for the seated infant, and the support assembly is configured to firmly and securely fix the seat body to the vehicle seat, preventing the seat body from tipping or sliding relative to the vehicle seat.

[0003] FIG. 1 is a side view of a typical support assembly (hereinafter referred to as the support assembly) of a child safety seat. The support assembly includes a base 1', a rebound bracket 2', and a load leg 5'. The base 1' is configured to be disposed on the seat body of the vehicle seat, and an ISOFIX plug 9' configured to be locked to the ISOFIX socket of the vehicle seat is provided at the rear end of the base 1'. The rebound bracket 2', also called a rebound bar, has its lower end fixedly attached to the base 1' and is inclined with respect to the base 1'. The rebound bracket 2' is configured to be pressed against the backrest of the vehicle seat. The load leg 5' is disposed at the front end of the base 1' and is configured to be supported by the floor of the vehicle. The rebound bracket 2' cooperates with the load leg 5' to prevent the base from tipping and the seat body installed on the base 1' from tipping when the vehicle brakes suddenly due to an accident.

[0004] When the support assembly of the child safety seat is used, when the rebound bracket 2' is firmly pressed against the backrest of the vehicle seat and the load leg 5' is firmly pressed against the floor of the vehicle, the child safety seat fully plays a protective role. Since there are various types of vehicles and the internal designs of various vehicles are extremely different, in order to enable the support assembly of the child safety seat to be applicable to various types of vehicles, in related technologies, the load leg 5' is configured to be a multi-section retractable load leg. The pressing effect of the rebound bracket 2' against the backrest and the pressing effect of the load leg 5' against the vehicle floor are adjusted by adjusting the height of the load leg 5'. Summary of the Invention Problems to be Solved by the Invention

[0005] This application intends to provide a support assembly for a child safety seat and improve the compatibility of the support assembly of the child safety seat with various types of vehicles. Means for Solving the Problems

[0006] In one aspect, this application provides a support assembly for a child safety seat, including a base, a rebound bracket, a locking mechanism, and a tension belt. The rebound bracket includes a pivotable arm and a first crossbeam disposed at the upper end of the pivotable arm. The lower end of the pivotable arm is pivotably connected to the base. The locking mechanism is disposed on the base. The first end of the tension belt is connected to the base, the second end of the tension belt functions as a tension end, and the middle portion of the tension belt is configured to pass through the first crossbeam and the locking mechanism. The second end of the tension belt is configured to first pass through the first crossbeam and then through the locking mechanism, and the locking mechanism is configured to lock the tension belt.

[0007] In another aspect, the present application provides a support assembly for a child safety seat including a base, a rebound bracket, a locking mechanism, and a tension belt. The rebound bracket includes a pivotable arm and a first cross beam disposed at an upper end of the pivotable arm, and a lower end of the pivotable arm is pivotally connected to the base. The locking mechanism is disposed on the first cross beam. A first end of the tension belt is connected to the base, an intermediate portion of the tension belt is configured to pass through the locking mechanism, and a second end of the tension belt functions as a tension end. The locking mechanism is configured to lock the tension belt.

[0008] In some embodiments, the second end of the tension belt is configured to penetrate the bottom of the base and extend toward the front of the base.

[0009] In some embodiments, the locking mechanism includes a locking channel and a locking member, the intermediate portion of the tension belt is configured to pass through the locking channel, and the locking member is configured to press the tension belt against the channel wall of the locking channel.

[0010] In some embodiments, the locking mechanism further includes a mounting housing, the locking channel is formed in the mounting housing. The locking member is pivotally connected to the mounting housing by a first pin shaft. A first end of the locking member is configured to press the tension belt against the channel wall of the locking channel, and a second end of the locking member is configured to bear a force for driving the locking member to rotate around the first pin shaft, releasing the tension belt from being pressed by the first end of the locking member.

[0011] In some embodiments, the first end of the locking member includes a cam.

[0012] In some embodiments, the locking mechanism further includes a first torsion spring that sleeves a first pin shaft, and two ends of the first torsion spring are respectively connected to the locking member and the mounting housing.

[0013] In some embodiments, the locking mechanism is pivotally connected to the mounting housing by a second pin shaft and further includes a button that at least partially covers the locking member, and the button has a pressing portion corresponding to a second end of the locking member.

[0014] In some embodiments, the first end of the locking member has a curved surface configured to be pressed against the tension belt.

[0015] In some embodiments, a ratchet structure is disposed on the curved surface.

[0016] In some embodiments, an elastic member is disposed between the base and the rebound bracket, and the elastic member is configured to exert a force on the rebound bracket to move the rebound bracket away from the base or to move the rebound bracket closer to the base.

[0017] In some embodiments, the elastic member is a spring, and both ends of the spring are respectively connected to the base and the rebound bracket. Alternatively, the elastic member is a second torsion spring, and the lower end of the rebound bracket is pivotally connected to the base by a third pin shaft. The second torsion spring sleeves the third pin shaft, and both ends of the second torsion spring are respectively connected to the base and the rebound bracket.

[0018] In another aspect, the present application provides a child seat including the support assembly of the above child safety seat.

[0019] When it is necessary to attach and tighten the support assembly of the child safety seat provided by the present invention to a vehicle seat, by operating the tension belt and the load leg, the rebound bracket can easily and strongly press the backrest of the vehicle seat, and the lower end of the load leg presses the floor in the vehicle. Therefore, the support assembly can surely engage with the vehicle seats of various types of vehicles, and relative movement therebetween does not easily occur. The support assembly of the child safety seat provided by the present invention has high versatility.

Brief Description of the Drawings

[0020]

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DETAILED DESCRIPTION OF THE INVENTION

[0021] However, there are steps in the height adjustment of the multi-stage opening and closing support legs. When applying a child safety seat with multi-stage opening and closing support legs to some vehicles, it is difficult to consider both the tight pressing action of the upper tilting bracket and the tight pressing action of the support legs at the same time.

[0022] FIGS. 2 to 6 schematically show the structure of a support assembly 100 of a child safety seat according to an embodiment of the present invention. The support assembly 100 of the child safety seat (hereinafter, also simply referred to as the support assembly 100) includes a base 1, a rebound bracket 2, a tension belt 3, a locking mechanism 4, and a load leg 5.

[0023] Referring to FIGS. 2 to 4, in some embodiments, the base 1 includes a base frame 11 and a base body 12 disposed on the base frame 11. The base frame 11 includes two longitudinal beams 111 spaced apart along the left-right direction of the vehicle, and each longitudinal beam 111 is substantially linear or in any other suitable shape. In this embodiment, the front ends of the two longitudinal beams 111 are each bent upward, and the rear ends of the two longitudinal beams 111 are joined to form a U-shape. The base body 12 is disposed on the two longitudinal beams 111 and is configured to be installed together with a seat body (not shown) of a child safety seat. It should be understood that the structure of the base 1 can also have other embodiments.

[0024] It should be noted that the directional terms such as "front", "rear", "left", "right", "up", and "down" in this embodiment correspond to the "front", "rear", "left", "right", "up", and "down" directions of the vehicle unless otherwise explicitly limited. The "front", "rear", "left", and "right" directions are schematically indicated by the arrows F, B, L, and R in the figure. The directional terms are only used to make the description of the embodiments of the present application clearer and are not intended to unduly limit the protection scope of the present application.

[0025] The rebound bracket 2 and the load leg 5 are each connected to the base 1. According to the related art, the base 1 is configured to be disposed on a seat body (not shown) of a vehicle seat, and it will be understood that an ISOFIX plug 9 is provided at the rear end of the base body 12 of the base 1. The ISOFIX plug 9 is configured to be locked to an ISOFIX socket of the vehicle seat. The rebound bracket 2 is configured to be pressed against the backrest of the vehicle seat, and the load leg 5 is configured to be supported by the floor of the vehicle. In this embodiment, the rebound bracket 2 is, for example, a U-shaped rebound bar, and includes two pivotable arms 21 and a first cross beam 22 disposed at the upper ends of the two pivotable arms 21. The lower ends of the two pivotable arms 21 are pivotably connected, for example, by respective third pin shafts 28, to a position behind the middle of the base frame 11 of the base 1. When the support assembly 100 is in normal use, the pivotable arms 21 are each inclined with respect to the base 1. In this embodiment, the leaning bracket 2 includes two pivotable arms 21, and the first cross beam 22 is connected between the upper ends of the two pivotable arms 21. However, in some alternative embodiments, it should be understood that the leaning bracket 2 includes, for example, one pivot arm, and the pivot arm is disposed, for example, on the longitudinal center plane of the base frame 11. In this case, the first cross beam 22 and the pivot arm are arranged, for example, in a T-shape. The load leg 5 is configured to be supported by the floor of the vehicle. The upper end of the load leg 5 includes a second cross beam 51, and both ends of the second cross beam 51 are pivotably connected to the front end of the base frame 11, more specifically, to the front ends of the two longitudinal beams 111.

[0026] The tension belt 3 is, for example, a fabric belt or other suitable belt. The first end 31 of the tension belt 3 is connected to the base 1, and the second end 32 of the tension belt 3 is, for example, a tension end. The middle portion 30 of the tension belt 3, i.e., the portion of the tension belt 3 located between the first end 31 and the second end 32, passes through the first cross beam 22 and is more specifically wound around the first cross beam 22. The middle portion 30 of the tension belt 3 is connected to the rebound bracket 2 by the first cross beam 22, and it will be understood that the tension belt 3 can exert an effect on the rebound bracket 2 by its own tension. In some embodiments, the second end of the tension belt 3 is a free end. In some embodiments, the second end 32 of the tension belt 3 includes a pull ring 35, and the user can pull the tension belt 3 by the pull ring 35.

[0027] Referring to FIGS. 2 to 4, when the support assembly 100 of the child safety seat is in use, i.e., when the base 1 is placed on the seat body of the vehicle seat to support the child safety seat and the rebound bracket 2 is pressed against the backrest of the vehicle seat, when the user pulls the second end 32 of the tension belt 3, the tension belt 3 applies pressure to the rebound bracket 2 in a tensioned state, enabling the rebound bracket 2 to pivot in the direction indicated by arrow Z towards the base 1, thereby pressing strongly against the backrest of the vehicle seat.

[0028] In this embodiment, the middle portion 30 of the tension belt 3 is wound around the middle portion of the first cross beam 22, thereby being slidably connected to the first cross beam 22, which is beneficial for balancing the force applied to the rebound bracket 2 when the tension belt 3 is pulled. Of course, in other embodiments, the middle portion 30 of the tension belt 3 is wound around any other cross beam structure arranged above, for example, any pivotable arm 21, and thus is slidably connected relative to the pivotable arm 21. In this case, when the tension belt 3 is pulled, the tension belt 3 can also be driven to pivot the rebound bracket 2 toward the base 1 against the supporting force of the backrest, whereby the rebound bracket 2 is firmly pressed against the backrest of the vehicle seat.

[0029] As can be seen from FIG. 4, a locking mechanism 4 is attached to a proper position of the base 1. This locking mechanism 4 is connected to the tension belt 3 and is configured to maintain the state in which the tension belt 3 applies the aforementioned pressing force to the rebound bracket 2. According to the above description, it will be known that when the support assembly 100 is used, the pivoting of the rebound bracket 2 toward the base 1 is restricted by the backrest of the vehicle seat. After the user pulls the second end 32 of the tension belt 3 to strongly press the rebound bracket 2 against the backrest of the vehicle seat, the locking mechanism 4 is configured to prevent the relative movement between the tension belt 3 and the locking mechanism 4 so that the portion of the tension belt 3 between the first end 31 of the tension belt 3 and the locking mechanism 4 is kept in a tensioned state. That is, under the action of the tension belt 3 and the locking mechanism 4, the vertical distance H between the first cross beam 22 and the first end 31 of the tension belt 3 maintains a substantially constant value. In this case, even if the user loosens the second end 32 of the tension belt 3, the tension belt 3 can maintain the state in which the above-mentioned pressing force is applied to the rebound bracket 2, and the rebound bracket 2 maintains the state of being strongly pressed against the backrest of the vehicle seat.

[0030] Referring to FIG. 4, in the present embodiment, the locking mechanism 4 is disposed, for example, at the front end of the base body 12 of the base 1, and is disposed on the downstream side of the first cross beam 22 in the path direction from the first end 31 to the second end 32 of the tension belt 3. The middle portion 30 of the tension belt 3 passes through the locking mechanism 4 through the bottom of the base 1 so as to extend forward of the base 1 when the second end 32 of the tension belt 3 is pulled. In this way, when it is necessary to strongly press the rebound bracket 2 against the backrest of the vehicle seat, the user can easily press the rebound bracket 2 pressed by the tension belt 3 against the backrest of the vehicle seat by pulling the second end 32 of the tension belt 3 from the front of the base 1 and operating the locking mechanism 4. Referring to FIG. 4, in the path direction from the first end 31 to the second end 32 of the tension belt 3, it will be understood that the first end 31 of the tension belt 3 is disposed upstream of the first cross beam 22, and the second end 32 of the tension belt 3 is disposed downstream of the locking mechanism 4. In the mounting process of the tension belt 3, when the first end 31 of the tension belt 3 is connected to the base 1, the second end 32 of the tension belt 3 can pass through the first cross beam 22 and the locking mechanism 4 in sequence, thereby completing the mounting of the tension belt 3.

[0031] In some embodiments, in order to ensure that the middle portion 30 of the tension belt 3 is securely wound around the first cross beam 22 and does not move laterally along the first cross beam 22 when tension is applied, the rebound bracket 2 includes a guide channel 201 that allows the middle portion 30 of the tension belt 3 to pass through. Referring to FIG. 2, the guide channel 201 is formed, for example, by a through hole disposed in the cross beam 22. In some embodiments not shown, the guide channel 201 is formed, for example, by a slot disposed in the first cross beam 22, or the guide channel 201 is formed, for example, by an accessory disposed on the first cross beam 22, or the guide channel 201 is formed, for example, between the first cross beam 22 and an accessory disposed on the first cross beam 22.

[0032] Referring to FIGS. 5 and 6, an exemplary embodiment of the locking mechanism 4 is shown. The locking mechanism 4 includes a locking member 41 and a locking channel 402. The middle portion 30 of the tension belt 3 passes through the locking channel 402, and the locking member 41 is configured to press the tension belt 3 against the channel wall 4021 of the locking channel 402, so that the portion of the tension belt 3 between the first end 31 and the locking mechanism 4 is tensioned. It will be appreciated that the locking member 41 is in a locked state or an unlocked state. When the locking member 41 is in the locked state, the locking member 41 presses the tension belt 3 against the channel wall 4021, that is, the tension belt 3 is clamped between the locking member 41 and the channel wall 4021. In this case, when the tension belt 3 is pulled, the tension belt 3 is protected from moving relative to the locking mechanism 4. When the locking member 41 is in the unlocked state, the tension belt 3 is released from the pressing by the locking member 41, the entire tension belt 3 is in a relaxed state, and relative movement with respect to the locking mechanism 4 is allowed.

[0033] In some embodiments, the surface of the locking member 41 in contact with the tension belt 3 includes a first protrusion, and / or the surface of the channel wall 4021 in contact with the tension belt 3 includes a second protrusion (not shown). The first protrusion and the second protrusion are, for example, protrusions, teeth, or other structures. When the locking member 41 presses the tension belt 3 against the channel wall 4021, the first protrusion and the second protrusion engage with the tension belt 3 by the cooperation of the unevenness, increasing the resistance to the movement of the tension belt 3 and further preventing the tension belt 3 from moving relative to the locking mechanism 4 when the locking member 41 is in the locked state.

[0034] Referring to FIG. 5, the locking mechanism 4 includes a mounting housing 42, through which the locking mechanism 4 is mounted at a fixed position, more specifically, on the base 1. The locking channel 402 is formed in the mounting housing 42. The tension belt 3 enters the mounting housing 42 from one end of the locking channel 402 and exits the mounting housing 42 from the other end of the locking channel 402. The locking member 41 is disposed on the mounting housing 42. For example, the middle portion of the locking member 41 is pivotally connected to the mounting housing 42 by a first pin shaft 43. The first end 411 of the locking member 41 functions as a locking end that presses the tension belt 3 against the channel wall 4021 of the locking channel 402, and the second end 412 of the locking member 41 functions as an operating end that enables the locking member 41 to rotate around the first pin shaft 43, thereby releasing the tension belt 3 from the state where it is pressed by the first end 411 of the locking member 41.

[0035] In this embodiment, an exemplary embodiment of the mounting housing 42 is shown. The mounting housing 42 includes, for example, a first housing 421 and a second housing 422. The first housing 421 and the second housing 422 are engaged and fixed to the rib 121 of the base body 12 by, for example, fasteners. The locking member 41 is disposed, for example, on the second housing 422, and the locking channel 402 is formed, for example, in the second housing 422.

[0036] Referring to FIG. 6, in some embodiments, the second housing 422 further includes, for example, a support 4220. The support 4220 is made of, for example, a metallic material (e.g., iron or stainless steel) and is fixed to the body of the second housing 422 made of, for example, a plastic material by fasteners. The support 4220 includes, for example, a bottom wall 4220a and two side walls 4220b located on the opposite side of the bottom wall 4220a. The first pin shaft 43 includes a sleeve 432 and a core shaft 431 sleeved by the sleeve 432. The locking member 41 has a through hole 41a configured to be pivotally connected to the sleeve 432. A through hole 4220c configured to be pivotally connected to the core shaft 431 is formed in the side wall 4220b. At least a part of the channel wall of the locking channel 402 is formed on the inner surface of the bottom wall 4220a, and the first end 411 of the locking member 41 is configured to press, for example, the tension belt 3 against the bottom wall 4220a. It will be understood that in other embodiments, the mounting housing 42 has other embodiments not limited to the above examples.

[0037] Referring to FIGS. 5 and 6, in the present embodiment, the locking mechanism 4 further includes a first torsion spring 45 that sleeves the first pin shaft 43. Both ends of the first torsion spring 45 are respectively connected to the locking member 41 and the mounting housing 42, for example, the support portion 4220 of the mounting housing 42. The first torsion spring 45 is configured to keep the locking member 41 in a locked state. When it is necessary to loosen the tension belt 3, the second end portion 412 of the locking member 41 is pressed to pivot the locking member 41 about the first pin shaft 43 against the elastic force of the first torsion spring 45, that is, the first end portion 411 of the locking member 41 is lifted from the tension belt 3, and the locking member 41 is switched to an unlocked state.

[0038] In some embodiments, the first end portion 411 of the locking member 41 has a curved surface for pressing the tension belt 3, and the curved surface includes protruding teeth 410 formed thereon. The protruding teeth 410 are configured to press the tension belt 3 against the bottom wall 4220a, and can effectively prevent the movement of the tension belt 3. In some embodiments, the protruding teeth 410 on the curved surface are configured to have a ratchet structure. In this case, when the locking member 41 is in the locked state, when the second end portion 32 of the tension belt 3 is pulled, the tension belt 3 moves forward relative to the locking mechanism 4, and the rebound bracket 2 is further pressed against the backrest. When the locking member 41 is in the locked state, the ratchet structure prevents the tension belt 3 from moving relatively backward with respect to the locking mechanism 4, thereby preventing the tension portion of the tension belt 3 from loosening.

[0039] Referring to FIGS. 5 and 6, in some embodiments, the locking mechanism 4 further includes a button 47 pivotally coupled to the mounting housing 42 by a second pin shaft 46. For example, the second housing 422 is provided with a hole 4221 for mounting the second pin shaft 46. The button 47 at least partially covers the locking member 41, and the button 47 has a pressing portion 472 corresponding to the second end 412 of the locking member 41. The user can easily switch the locking member 41 to the unlocked state by pressing the pressing portion 472.

[0040] In one embodiment, the first end of the locking member 41 is a cam, and the user can operate the second end 412 of the locking member 41 through the shape feature of the cam so that the locking member 41 can pivot about the first pin shaft 43, thereby enabling the locking member 41 to be easily switched between the locked state and the unlocked state. More specifically, when the second end 32 of the tension belt 3 is pulled to generate tension in the tension belt 3, and the user operates the second end 412 of the locking member 41 to switch the locking member 41 to the locked state, the cam of the locking member 41 presses the tension belt 3 against the channel wall 4021 of the lock channel 402. At this time, even if the user loosens the second end 32 of the tension belt 3, the portion between the first end 31 of the tension belt 3 and the locking mechanism 4 remains under tension. When the user operates the second end 412 of the locking member 41 to switch the locking member 41 to the unlocked state, the cam of the locking member 41 releases the pressing on the tension belt 3, that is, the tension belt 3 is not clamped between the cam of the locking member 41 and the channel wall 4021 of the lock channel 402. At this time, the entire tension belt 3 is in a relaxed state, and the user can pull the tension belt 3 as needed.

[0041] Referring to FIG. 3, in some embodiments, the elastic member 6 is disposed between the base 1 and the rebound bracket 2. As required, the elastic member 6 is configured to exert a force on the rebound bracket 2 to move the rebound bracket 2 away from the base 1 or closer to the base 1. Taking as an example the case where the elastic member 6 exerts a force on the rebound bracket 2 to separate the rebound bracket 2 from the base 1, when it is necessary to release the rebound bracket from the pressure against the backrest, the user switches the lock member 41 to the unlocked state, and under the action of the elastic member 6, the rebound bracket 2 automatically rises and is no longer pressed against the backrest.

[0042] In some embodiments, the elastic member 6 includes a second torsion spring. The second torsion spring sleeves the third pin shaft 28, and the two ends of the second torsion spring are respectively connected to the base 1 and the rebound bracket 2. In some embodiments not shown, the elastic member 6 is a linear spring, and the two ends of the spring are respectively connected to the base 1 and the rebound bracket 2.

[0043] Referring to FIG. 2, after the support assembly 100 of this embodiment is attached to the vehicle seat, for example, when it is necessary to strongly press against the seat body or the backrest of the vehicle seat, the lock member 41 is switched to the unlocked state, and the second end 32 of the tension belt 3 is pulled forward to forcibly swing the rebound bracket 2 in the direction indicated by the arrow Z, making it easier to strongly press the rebound bracket 2 against the backrest. Then, the lock member 41 is switched to the locked state to maintain the state where the rebound bracket 2 is strongly pressed against the backrest. Furthermore, by pushing the load leg 5 backward, it becomes easier for the load leg 5 to be strongly pressed against the vehicle floor.

[0044] In the support assembly 100 of the present embodiment, the load leg 5 is a retractable load leg or a load leg having a fixed length, and the load leg 5 is fixedly or pivotally connected to the base 1. When the second end 32 of the tension belt 3 is pulled, the rebound bracket 2 is easily and strongly pressed against the backrest. Then, the tension belt 3 is locked by the locking mechanism 4, and the lower end of the load leg 5 is strongly pressed against the vehicle floor, so that the support assembly 100 can be reliably engaged with various vehicle seats.

[0045] Figures 7 to 10 schematically show the structure of the support assembly 100 of a child safety seat according to another embodiment of the present invention.

[0046] As shown in the figure, similar to the above embodiment, the support assembly 100 of the present embodiment includes a base 1, a rebound bracket 2, a tension belt 3, a locking mechanism 4, and a load leg 5. The main difference between this embodiment and the above embodiment is mainly the position of the locking mechanism 4. Other features of this embodiment can refer to the description of the above embodiment within a non - conflicting range.

[0047] Referring to Figures 7 to 9, in this embodiment, the locking mechanism 4 is disposed not in the base body 12 of the base 1 but in the middle part of the first cross beam 22, and the middle part  30 of the tension belt 3 is connected to the first cross beam 22 of the rebound bracket 2 by the locking channel 402 of the locking mechanism 4. Referring to Figure 8, the first end 31 of the tension belt 3 is connected to the base 1, and the second end 32 of the tension belt 3 passes through the locking mechanism 4 and then goes downward, passes through the bottom of the base 1 and extends forward of the base 1.

[0048] The structure of the locking mechanism 4 can be referred to the locking mechanism 4 shown in FIG. 6, and will not be repeatedly described here. Referring to FIGS. 9 and 10, in the present embodiment, the first housing 421 and the second housing 422 of the mounting housing 42 are engaged and fixed to the middle part of the first cross beam 22 by, for example, a fastener.

[0049] Referring to FIG. 8, when the support assembly 100 of the present embodiment is in use, the second end 32 of the tension belt 3 is pulled, and while tension is applied to the tension belt 3, pressure is applied to the rebound bracket 2, and the rebound bracket 2 pivots toward the base 1 in the direction indicated by the arrow Z and is firmly pressed against the backrest of the vehicle seat. Then, since the relative movement between the tension belt 3 and the locking mechanism 4 is blocked by the locking mechanism 4, the portion between the first end 31 of the tension belt 3 and the locking mechanism 4 is kept in a tension state. That is, under the action of the tension belt 3 and the locking mechanism 4, the vertical distance H between the first cross beam 22 and the first end 31 of the tension belt 3 maintains a substantially constant value. In this case, even if the user loosens the second end 32 of the tension belt 3, the tension belt 3 can maintain the state of pressing the rebound bracket 2, and the rebound bracket 2 maintains the state of being strongly pressed against the backrest of the vehicle seat.

[0050] FIGS. 11 and 12 schematically show the structure of the support assembly 100 of the child safety seat according to still another embodiment of the present invention.

[0051] As shown in the figures, similar to the embodiments shown in FIGS. 7 to 9, the support assembly 100 of this embodiment includes a base 1, a rebound bracket 2, a tension belt 3, a locking mechanism 4, and a load leg 5. The locking mechanism 4 is disposed at an intermediate portion of the first cross beam 22. Different from the embodiments shown in FIGS. 7 to 9, in this embodiment, the second end 32 of the tension belt 3 is not configured to extend through the bottom of the base 1 to the front of the base 1. Referring to FIG. 11, the second end 32 of the tension belt 3 is configured to pass through the locking mechanism 4, for example, in a direction from the rear to the front. The second end 32 of the tension belt 3 hangs above the base 1 when no force is applied. Since the tension belt 3 does not need to pass through the bottom of the base 1, the length of the tension belt 3 is significantly shortened. For other features of this embodiment, reference can be made to the description of the above embodiments within the non - conflicting scope.

[0052] In addition, for the structure of the locking mechanism 4 of this embodiment, reference can be made to the locking mechanism 4 shown in FIG. 6, FIG. 11 or FIG. 12. The locking mechanism 4 includes a mounting housing 42 configured to fix the locking mechanism 4 to the first cross beam 22, and a locking member 41 pivotally connected to the mounting housing 42. The first end 411 of the locking member 41 functions as a locking end that presses against the tension belt 3, and the second end 412 of the locking member 41 functions as an operating end that releases the pressing of the first end 411 of the locking member 41 against the tension belt 3. Referring to the description of the above embodiments, the locking member 41 is pivotally connected to the mounting housing 42 by a first pin shaft 43. The first end 411 of the locking member 41 includes, for example, a cam, or the first end 411 of the locking member 41 is a curved surface including a protruding tooth 410. A first torsion spring 45 sleeves the first pin shaft 43. Further, the mounting housing 42 may not be provided with a button 47.

[0053] When the support assembly 100 of the present embodiment is in use, while the second end 32 of the tension belt 3 is pulled in the horizontal direction, the rebound bracket 2 is pushed toward the backrest of the vehicle seat. While the tension belt 3 is tensioned, the rebound bracket 2 pivots in the direction indicated by the arrow Z toward the base 1 and is strongly pressed against the backrest of the vehicle seat. Then, since the relative movement between the tension belt 3 and the locking mechanism 4 is blocked by the locking mechanism 4, the portion between the first end 31 of the tension belt 3 and the locking mechanism 4 is kept in a tensioned state. That is, under the action of the tension belt 3 and the locking mechanism 4, the vertical distance H between the first cross beam 22 and the first end 31 of the tension belt 3 maintains a substantially constant value. In this case, even if the user loosens the second end 32 of the tension belt 3, the tension applying portion of the tension belt 3 pulls the first cross beam 22 and does not rebound, so the rebound bracket 2 is maintained in a state of being strongly pressed against the backrest of the vehicle seat.

[0054] FIGS. 13 to 15 schematically show the structure of the support assembly 100 of the child safety seat according to still another embodiment of the present invention.

[0055] As shown in the figures, similar to the embodiments shown in FIGS. 11 and 12, the support assembly 100 of this embodiment includes a base 1, a rebound bracket 2, a tension belt 3, a locking mechanism 4, and a load leg 5. The locking mechanism 4 is connected to the middle part of the first cross beam 22. Different from the embodiments shown in FIGS. 11 and 12, the second end 32 of the tension belt 3 first passes through the locking channel 402 of the locking mechanism 4, and then is wound around the first cross beam 22, and then is configured to extend forward. In order to prevent the middle part 30 of the tension belt 3 wound around the first cross beam 22 from moving unexpectedly along the first cross beam 22, a housing 7 is provided on the first cross beam 22 of the rebound bracket 2, and a hole 71 through which the tension belt 3 wound around the first cross beam 22 can pass is formed in the housing 7. For other features of this embodiment, please refer to the description of the above embodiments within the range where there is no contradiction.

[0056] As shown in FIGS. 14 and 15, the locking mechanism 4 includes a mounting housing 42 configured to fix the locking mechanism 4 to the first cross beam 22, and a locking member 41 pivotally connected to the mounting housing 42 by a first pin shaft 43. The first torsion spring 45 is configured to sleeve the first pin shaft 43, and the two ends of the first torsion spring 45 are respectively connected to the locking member 41 and the mounting housing 42. The first end 411 of the locking member 41 functions as a locking end that presses against the tension belt 3. The second end 412 of the locking member 41 functions as an operating end. When stress is applied, it overcomes the elastic force of the first torsion spring 45 and pivots the locking member 41 around the first pin shaft 43, thereby releasing the pressing of the first end 411 of the locking member 41 against the tension belt 3. The mounting housing 42 may not be provided with a button 47. Referring to FIG. 13, a hole 72 is arranged at the position of the housing 7 corresponding to the position of the second end 412 of the locking member 41, and the user can operate the second end 412 of the locking member through the hole 72.

[0057] Note that the middle portion 30 of the tension belt 3 in this embodiment is configured to pass through the through hole 71 and be wound around the first cross beam 22. However, in other embodiments, the middle portion 30 of the tension belt 3 is configured to pass through the locking mechanism 4 but not be wound around the first cross beam 22, and the tension belt 3 is connected to the first cross beam 22 by the locking mechanism 4.

[0058] When the support assembly 100 of this embodiment is in use, while the second end portion 32 of the tension belt 3 is pulled, the rebound bracket 2 is pushed toward the backrest of the vehicle seat. The rebound bracket 2 pivots in the direction indicated by the arrow Z toward the base 1 and is strongly pressed against the backrest of the vehicle seat while tension is applied to the tension belt 3. Relative movement between the tension belt 3 and the locking mechanism 4 can be blocked by the locking mechanism 4, whereby the portion between the first end portion 31 of the tension belt 3 and the locking mechanism 4 is maintained in a tensioned state. That is, under the action of the tension belt 3 and the locking mechanism 4, the vertical distance H between the first cross beam 22 and the first end portion 31 of the tension belt 3 maintains a substantially constant value. In this case, even if the user loosens the second end portion 32 of the tension belt 3, the tensioned portion of the tension belt 3 pulls the first cross beam 22 and does not rebound, so the rebound bracket 2 is maintained in a state of being strongly pressed against the backrest of the vehicle seat.

[0059] The embodiment of the present application also provides a child safety seat, and the child safety seat includes any one of the support assemblies 100 of the above child safety seat.

[0060] The technical features of the above embodiments can be arbitrarily combined. For the sake of brevity of description, not all possible combinations of the technical features of the above embodiments are described. However, as long as there is no contradiction among these combinations of technical features, all these combinations of technical features should be within the scope described in this specification.

[0061] The above embodiments are only some embodiments of the present invention. Although the description of the embodiments is specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the idea of the present invention, and all these modifications and improvements are within the protection scope of the present invention. Therefore, the protection scope of the present application should be based on the scope of the claims.

Claims

1. A base, a rebound bracket comprising a pivotable arm and a first cross beam disposed at the upper end of the pivotable arm, wherein the lower end of the pivotable arm is pivotally connected to the base, a locking mechanism disposed on the base, a tension belt, wherein a first end of the tension belt is connected to the base, a second end of the tension belt functions as a tension end, and an intermediate portion of the tension belt is configured to pass through the first cross beam and the locking mechanism, The second end of the tension belt is configured to first pass through the first cross beam and then through the locking mechanism, and the locking mechanism is configured to lock the tension belt. A support assembly for a child safety seat.

2. The first cross beam is provided with a guide channel, and the intermediate portion of the tension belt is configured to pass through the guide channel and be wound around the first cross beam. The support assembly for a child safety seat according to claim 1, characterized in that.

3. An accessory is disposed on the first cross beam, and the guide channel is formed on the accessory or formed between the accessory and the first cross beam. The support assembly for a child safety seat according to claim 2, characterized in that.

4. The locking mechanism is disposed at the front end of the base, and the intermediate portion of the tension belt is configured to pass through the locking mechanism through the bottom of the base. The support assembly for a child safety seat according to any one of claims 1 to 3.

5. The locking mechanism includes a locking channel and a locking member. The intermediate portion of the tension belt is configured to pass through the locking channel, and the locking member is configured to press the tension belt against the channel wall of the locking channel. The support assembly for a child safety seat according to any one of claims 1 to 3.

6. A first protrusion is disposed on the surface of the locking member in contact with the tension belt, and / or A second protrusion is disposed on the surface of the channel wall in contact with the tension belt. The support assembly of the child safety seat according to claim 5.

7. The elastic member is disposed between the base and the rebound bracket, and the elastic member is configured to apply a force to the rebound bracket so as to move the rebound bracket away from the base or to move the rebound bracket closer to the base. The support assembly of the child safety seat according to any one of claims 1 to 3.

8. A base, A rebound bracket, comprising a pivotable arm and a first cross beam disposed at an upper end of the pivotable arm, wherein a lower end of the pivotable arm is pivotably connected to the base. A locking mechanism disposed on the first cross beam; A tension belt, wherein a first end of the tension belt is connected to the base, an intermediate portion of the tension belt is configured to pass through the locking mechanism, and a second end of the tension belt functions as a tension end. The locking mechanism is configured to lock the tension belt. The support assembly of the child safety seat.

9. The support assembly of the child safety seat according to claim 8, wherein the second end of the tension belt is configured to pass through the bottom of the base and extend toward the front of the base.

10. The locking mechanism includes a locking channel and a locking member. The intermediate portion of the tension belt is configured to pass through the locking channel, and the locking member is configured to press the tension belt against the channel wall of the locking channel. The support assembly of the child safety seat according to claim 8.

11. The locking mechanism further includes a mounting housing, and the locking channel is formed in the mounting housing. The lock member is pivotally connected to the mounting housing by a first pin shaft. A first end of the lock member is configured to press the tension belt against a channel wall of the lock channel. A second end of the lock member is configured to bear a force for driving the lock member to rotate around the first pin shaft. The lock member is configured to release the pressing of the tension belt by the first end of the lock member. The support assembly of the child safety seat according to claim 10.

12. The support assembly of the child safety seat according to claim 11, wherein the first end of the lock member comprises a cam.

13. The support assembly of the child safety seat according to claim 11 or 12, wherein the lock mechanism further comprises a first torsion spring sleeving the first pin shaft, and both ends of the first torsion spring are respectively connected to the lock member and the mounting housing.

14. The support assembly of the child safety seat according to claim 11 or 12, wherein the lock mechanism is pivotally connected to the mounting housing by a second pin shaft, and further comprises a button at least partially covering the lock member, and the button has a pressing portion corresponding to the second end of the lock member.

15. The support assembly of the child safety seat according to claim 11 or 12, wherein the first end of the lock member has a curved surface configured to be pressed against the tension belt.

16. The support assembly of the child safety seat according to claim 15, wherein a ratchet structure is arranged on the curved surface, and the ratchet structure is arranged at a position on the side opposite to the tension belt when the lock member is in a locked state.

17. The support assembly of the child safety seat according to any one of claims 8 to 12, wherein an elastic member is arranged between the base and the rebound bracket, and the elastic member is configured to apply a force to the rebound bracket to move the rebound bracket away from the base or to move the rebound bracket closer to the base.

18. The elastic member is a spring, and both ends of the spring are respectively connected to the base and the rebound bracket, or the elastic member is a second torsion spring, a lower end of the rebound bracket is pivotally connected to the base by a third pin shaft, the second torsion spring sleeves the third pin shaft, and both ends of the second torsion spring are respectively connected to the base and the rebound bracket. The support assembly of the child safety seat according to claim 17.

19. A child safety seat comprising the support assembly of the child safety seat according to any one of claims 1 to 3 and 8 to 12.

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