Dual-safety-belt synchronous movement mechanism, retractor device and child safety seat

Abstract

The embodiments of the present invention relate to the technical field of child safety seats. Provided are a dual-safety-belt synchronous movement mechanism, a retractor device and a child safety seat. The dual-safety-belt synchronous movement mechanism comprises a mounting base, a first clamping roller and a second clamping roller, wherein the first clamping roller is rotatably arranged on the mounting base; the second clamping roller is rotatably arranged on the mounting base; and the second clamping roller is slidably arranged on the mounting base, thus moving closer to or away from the first clamping roller. The second clamping roller is configured such that, when the second clamping roller moves closer to the first clamping roller, the first clamping roller and the second clamping roller simultaneously grip a first safety belt and a second safety belt. The dual-safety-belt synchronous movement mechanism can be used in a retractor mechanism, and achieves synchronous movement of two safety belts, avoiding the safety belts of the retractor mechanism failing to move synchronously and thus getting stuck or even completely jammed, thereby ensuring normal use of the retractor mechanism.

Description

Dual safety belt synchronous movement mechanism, winding device and child safety seat TECHNICAL FIELD

[0001] The present application relates to the technical field of child safety seats, in particular to a dual safety belt synchronous movement mechanism, a winding device and a child safety seat. BACKGROUND

[0002] The five-point safety belt of a child safety seat needs two safety belts to bind a child, and the length of the two safety belts usually needs to be manually adjusted to ensure that the child is properly fixed. Once the adjustment is completed, the two safety belts will completely bind the child, thereby providing maximum safety protection.

[0003] In the prior art, although the two safety belts can be automatically wound or locked at the same time by a dual safety belt automatic winding structure, there is a situation where one of the two safety belts cannot move synchronously when the other is pulled, that is, the two safety belts cannot be linked, which can cause problems such as jamming and even being unable to use. SUMMARY

[0004] The present application provides a dual safety belt synchronous movement mechanism, a winding device and a child safety seat, which can realize linkage of the two safety belts, avoid the situation that the safety belt of the winding mechanism cannot be linked and causes jamming or even being unable to use, and ensure normal use of the winding mechanism.

[0005] Embodiments of the present application can be implemented as follows:

[0006] In a first aspect, the present application provides a dual safety belt synchronous movement mechanism, comprising:

[0007] a mounting seat;

[0008] a first clamping roller rotatably arranged on the mounting seat; and

[0009] a second clamping roller rotatably arranged on the mounting seat, and slidably arranged on the mounting seat to approach or move away from the first clamping roller;

[0010] The second clamping roller is configured to clamp the first safety belt and the second safety belt simultaneously with the first clamping roller when the second clamping roller approaches the first clamping roller.

[0011] In an optional embodiment, the dual safety belt synchronous movement mechanism further comprises an elastic device arranged on the mounting seat, and the elastic device elastically abuts against the second clamping roller.

[0012] In an optional embodiment, the double safety belt synchronous movement mechanism further comprises a first mounting shaft, the first clamping roller is rotatably sleeved on the first mounting shaft, the first mounting shaft is arranged on the mounting seat, and a wall of the first clamping roller is provided with first extrusion teeth.

[0013] The second clamping roller is configured to, in the case of being close to the first clamping roller, clamp the first safety belt and the second safety belt simultaneously by the first extrusion teeth and the second extrusion teeth.

[0014] In an optional embodiment, the double safety belt synchronous movement mechanism further comprises a second mounting shaft, the second clamping roller is rotatably sleeved on the second mounting shaft, the second mounting shaft is arranged on the mounting seat, and the second mounting shaft is slidably arranged on the mounting seat, a wall of the second clamping roller is provided with second extrusion teeth.

[0015] The second clamping roller is configured to, in the case of being close to the first clamping roller, clamp the first safety belt and the second safety belt simultaneously by the first extrusion teeth and the second extrusion teeth.

[0016] In an optional embodiment, the double safety belt synchronous movement mechanism further comprises a first elastic member, the first elastic member is arranged on the mounting seat, and the first elastic member elastically abuts against the second mounting shaft.

[0017] In an optional embodiment, the number of the first clamping rollers and the second clamping rollers is both two, and the two first clamping rollers and the two second clamping rollers are distributed in a spaced manner.

[0018] The second clamping roller is configured to, in the case of being close to the first clamping roller, clamp the first safety belt by the first extrusion teeth of one of the first clamping rollers and the second extrusion teeth of one of the second clamping rollers, and clamp the second safety belt by the first extrusion teeth of the other first clamping roller and the second extrusion teeth of the other second clamping roller.

[0019] In an optional embodiment, the first clamping rollers and the second clamping rollers are distributed in a parallel manner.

[0020] In an optional embodiment, a wall of the first clamping roller is provided with third extrusion teeth, and a wall of the second clamping roller is provided with fourth extrusion teeth distributed in a parallel manner.

[0021] In an optional embodiment, the double safety belt synchronous movement mechanism further comprises a first bearing and a second bearing, and the first bearing and the second bearing are arranged on the mounting seat.

[0022] The first bearing sleeve is disposed at the end of the first clamping roller, and the second bearing sleeve is disposed at the end of the second clamping roller.

[0023] In an optional embodiment, the dual seat belt synchronous motion mechanism further includes a second elastic element disposed on the mounting base, the second elastic element elastically abutting against the second bearing.

[0024] Secondly, the present invention provides a winding device, including a winding mechanism and a dual seat belt synchronous motion mechanism as described in any of the foregoing embodiments, wherein the winding mechanism has a first seat belt and a second seat belt, and the first clamping roller and the second clamping roller simultaneously clamp the first seat belt and the second seat belt.

[0025] Thirdly, the present invention provides a child safety seat, including a seat body and a retractable device as described in the foregoing embodiments, wherein the retractable device is installed on the seat body.

[0026] The beneficial effects of the dual seatbelt synchronous movement mechanism, retracting device, and child safety seat of the present invention include, for example:

[0027] This invention provides a dual seatbelt synchronous movement mechanism, which includes a mounting base, a first clamping roller, and a second clamping roller. The first clamping roller is rotatably mounted on the mounting base, and the second clamping roller is rotatably mounted on the mounting base and slidably mounted on the mounting base to move closer to or further away from the first clamping roller. When the second clamping roller is close to the first clamping roller, it allows both the first and second clamping rollers to simultaneously clamp the first and second seatbelts. This dual seatbelt synchronous movement mechanism can be used in a winding mechanism (i.e., a dual seatbelt automatic winding structure). Because the first and second clamping rollers can simultaneously clamp the first and second seatbelts, pulling one seatbelt (e.g., the first seatbelt) causes the other seatbelt (e.g., the second seatbelt) to move synchronously, achieving linkage between the two seatbelts. This avoids jamming or even jamming caused by the seatbelts in the winding mechanism failing to move in tandem, ensuring the normal operation of the winding mechanism.

[0028] The present invention provides a winding device, which includes a winding mechanism and the aforementioned dual seat belt synchronous motion mechanism. The winding mechanism has a first seat belt and a second seat belt, and a first clamping roller and a second clamping roller simultaneously clamp the first seat belt and the second seat belt. The winding device has all the functions of the aforementioned dual seat belt synchronous motion mechanism.

[0029] The present invention provides a child safety seat, which includes a seat body and the aforementioned retractable device. The retractable device is installed on the seat body, and the child safety seat has all the functions of the aforementioned retractable device. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 is a first-view schematic diagram of a child safety seat provided in an embodiment of the present invention;

[0032] Figure 2 is a partial schematic diagram of the child safety seat in Figure 1;

[0033] Figure 3 is a second-view schematic diagram of a child safety seat provided in an embodiment of the present invention;

[0034] Figure 4 is a schematic diagram of the child safety seat structure provided in an embodiment of the present invention.

[0035] Figure 5 is an exploded view of the winding device provided in an embodiment of the present invention;

[0036] Figure 6 is an exploded view of a winding device provided in some embodiments of the present invention;

[0037] Figure 7 is a schematic diagram of the dual seat belt synchronous motion mechanism provided in some embodiments of the present invention;

[0038] Figure 8 is a partial cross-sectional view of the dual seat belt synchronous motion mechanism provided in some embodiments of the present invention.

[0039] Icons: 1000 - Rewinding device; 110 - Mounting base; 120 - First clamping roller; 130 - First mounting shaft; 140 - Second clamping roller; 150 - Second mounting shaft; 160 - First elastic element; 170 - Second elastic element; 180 - First bearing; 190 - Second bearing; 200 - Rewinding mechanism; 210 - First seat belt; 220 - Second seat belt; 230 - First end cap; 240 - Second end cap; 10 - Seat back; 20 - Headrest. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0044] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0045] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0046] As mentioned in the background section, a five-point harness for a child safety seat requires two harnesses to restrain the child. These harnesses typically need to be manually adjusted to ensure proper securing. Once adjusted, both harnesses fully restrain the child, providing maximum safety protection.

[0047] In existing technologies, although a dual-seatbelt automatic retraction structure can be used to retract two seatbelts simultaneously or lock two built-in seatbelts at the same time, there is a situation where pulling one seatbelt will cause the other to fail to move synchronously. In other words, the two seatbelts cannot work together, which can easily lead to jamming or even seizing, rendering the seatbelt unusable.

[0048] In view of this, please refer to Figures 1-8. The dual seat belt synchronous movement mechanism, retracting device 1000 and child safety seat provided in the embodiments of the present invention can solve this problem, and will be described in detail below.

[0049] Please refer to Figures 1-4. An embodiment of the present invention provides a child safety seat, which includes a seat body and a retractable device 1000. The seat body includes a backrest 10 and a headrest 20 installed on the backrest 10. The retractable device 1000 is installed on the headrest 20 of the seat body. The retractable device 1000 can realize the linkage of two seat belts (first seat belt 210 and second seat belt 220) to ensure the normal use of the retractable device 1000.

[0050] Specifically, the winding device 1000 includes a winding mechanism 200 and a dual seat belt synchronous movement mechanism. The winding mechanism 200 has a first seat belt 210 and a second seat belt 220. A first clamping roller 120 and a second clamping roller 140 simultaneously clamp the first seat belt 210 and the second seat belt 220.

[0051] In this embodiment, the dual seat belts can be understood as the first seat belt 210 and the second seat belt 220. The principle of the winding mechanism 200 can be referred to as the dual seat belt synchronous motion structure in the prior art, and its principle will not be described in detail here.

[0052] The dual seat belt synchronous movement mechanism includes a mounting base 110, a first clamping roller 120, and a second clamping roller 140. The first clamping roller 120 and the second clamping roller 140 are distributed in parallel. The first clamping roller 120 is rotatably mounted on the mounting base 110, and the second clamping roller 140 is rotatably mounted on the mounting base 110 and slidably mounted on the mounting base 110 to move closer to or away from the first clamping roller 120. The second clamping roller 140 is used to simultaneously clamp the first seat belt 210 and the second seat belt 220 when it is close to the first clamping roller 120.

[0053] Since the first clamping roller 120 and the second clamping roller 140 can clamp the first safety belt 210 and the second safety belt 220 simultaneously, pulling one safety belt (e.g., the first safety belt 210) will cause the other safety belt (e.g., the second safety belt 220) to move synchronously, thus realizing the linkage of the two safety belts. This avoids the situation where the safety belts of the winding mechanism 200 cannot be linked, which may cause jamming or even jamming, thereby ensuring the normal use of the winding device 1000.

[0054] It should be noted that the mounting base 110 and the retracting mechanism 200 are integrally formed, which is equivalent to the dual seat belt synchronous movement mechanism and the retracting mechanism 200 being integrated together. Of course, as shown in Figures 7 and 8, the mounting base 110 of the dual seat belt synchronous movement mechanism can also be a separate structure. In this way, the retracting mechanism 200 and the dual seat belt synchronous movement mechanism are independent devices that can be installed independently. At the same time, the space reserved in the child safety seat can be utilized more effectively, adapting to child safety seats with different installation spaces.

[0055] In other words, due to the structural limitations of child safety seats, the space available for the retractable mechanism 1000 is limited. If the retractable mechanism 200 and the dual seatbelt synchronous movement mechanism are integrated together, a large space needs to be reserved, which would reduce its versatility. However, when the retractable mechanism 200 and the dual seatbelt synchronous movement mechanism are separated (i.e., the retractable mechanism 200 and the dual seatbelt synchronous movement mechanism are independent devices), although the overall volume of the retractable mechanism 1000 is not reduced, the retractable mechanism 200 and the dual seatbelt synchronous movement mechanism can be placed in two relatively smaller spaces, thus making more efficient use of space.

[0056] Please continue to refer to Figure 5. The support structure of the winding mechanism 200 is equipped with a first end cap 230 and a second end cap 240 on both sides. At the same time, the dual safety belt synchronous movement mechanism also includes a first mounting shaft 130. The first clamping roller 120 is rotatably sleeved on the first mounting shaft 130. The first mounting shaft 130 is set on the mounting base 110. The peripheral wall of the first clamping roller 120 has a first extrusion tooth.

[0057] The second clamping roller 140 is used to simultaneously clamp the first seat belt 210 and the second seat belt 220 when it is close to the first clamping roller 120.

[0058] It should be noted that, in order to ensure that the first clamping roller 120 and the second clamping roller 140 can always simultaneously clamp the first seat belt 210 and the second seat belt 220, the dual seat belt synchronous movement mechanism also includes an elastic device, which can be understood as a spring. The elastic device is disposed on the mounting base 110 and elastically abuts against the second clamping roller 140. It is easy to understand that the elastic force of the elastic device can make the second clamping roller 140 press against the first seat belt 210 and the second seat belt 220. That is to say, the first clamping roller 120 and the second clamping roller 140 can always simultaneously clamp the first seat belt 210 and the second seat belt 220.

[0059] The number of elastic devices can be two, and the two elastic devices elastically abut against the two ends of the second clamping roller 140 respectively.

[0060] Specifically, in this embodiment, the dual seat belt synchronous movement mechanism further includes a second mounting shaft 150, a second clamping roller 140 rotatably sleeved on the second mounting shaft 150, the second mounting shaft 150 being disposed on the mounting base 110, the second mounting shaft 150 being slidably disposed on the mounting base 110, and the peripheral wall of the second clamping roller 140 having second extrusion teeth, wherein the second clamping roller 140 is used to simultaneously clamp the first seat belt 210 and the second seat belt 220 when close to the first clamping roller 120.

[0061] It should be noted that bearings may not be installed at the ends of the first mounting shaft 130 and the second mounting shaft 150.

[0062] To ensure that the first clamping roller 120 and the second clamping roller 140 can always simultaneously clamp the first safety belt 210 and the second safety belt 220, the dual safety belt synchronous movement mechanism also includes a first elastic element 160. The first elastic element 160 can be a spring. The first elastic element 160 is disposed on the mounting base 110 and elastically abuts against the second mounting shaft 150.

[0063] Specifically, there can be two first elastic elements 160, which elastically abut against both ends of the second mounting shaft 150.

[0064] Please continue to refer to Figure 6. In some embodiments, the first clamping roller 120 and the second clamping roller 140 of the dual seat belt synchronous motion mechanism can be directly and rotatably mounted on the mounting base 110. The peripheral wall of the first clamping roller 120 has a third extrusion tooth, and the peripheral wall of the second clamping roller 140 has a fourth extrusion tooth distributed in parallel.

[0065] The second clamping roller 140 is used to simultaneously clamp the first safety belt 210 and the second safety belt 220 when it is close to the first clamping roller 120.

[0066] In this embodiment, the dual seat belt synchronous motion mechanism further includes a first bearing 180 and a second bearing 190, both of which are disposed on the mounting base 110.

[0067] There are two first bearings 180 and two second bearings 190. The two first bearings 180 are respectively sleeved on the two ends of the first clamping roller 120, and the two second bearings 190 are sleeved on the two ends of the second clamping roller 140.

[0068] In addition, to ensure that the first clamping roller 120 and the second clamping roller 140 can always simultaneously clamp the first safety belt 210 and the second safety belt 220, the dual safety belt synchronous movement mechanism also includes a second elastic element 170. The second elastic element 170 can be a spring. In this embodiment, there are two second elastic elements 170. The second elastic elements 170 are disposed on the mounting base 110, and the two second elastic elements 170 elastically abut against the two second bearings 190 respectively.

[0069] Under the elastic force of the second elastic element 170, the second bearing 190 and the first bearing 180 located on the same side come into contact and squeeze each other, which simultaneously drives the two first squeezing teeth and the two second squeezing teeth to approach and clamp the first safety belt 210 and the second safety belt 220.

[0070] At this time, pulling one of the seat belts will cause the first clamping roller 120 and the second clamping roller 140 to rotate, and then the other seat belt will move synchronously, realizing the linkage between the first seat belt 210 and the second seat belt 220.

[0071] Referring to Figures 7 and 8, in other embodiments, there may be two first clamping rollers 120 and two second clamping rollers 140, with the two first clamping rollers 120 and the two second clamping rollers 140 being spaced apart. The second clamping roller 140 is used to clamp the first seat belt 210 with the third pressing tooth of one of the first clamping rollers 120 and the fourth pressing tooth of one of the second clamping rollers 140 when it is close to the first clamping roller 120, and to clamp the second seat belt 220 with the third pressing tooth of the other first clamping roller 120 and the fourth pressing tooth of the other second clamping roller 140.

[0072] Please refer again to Figures 1, 2, and 6. During the installation of the retractable device 1000, the first bearing 180 is generally installed on the end of the first clamping roller 120, and the second bearing 190 is installed on the end of the second clamping roller 140. Then, the first clamping roller 120 with the first bearing 180 and the second clamping roller 140 with the second bearing 190 are installed onto the retractable mechanism 200. Then, the first safety belt 210 and the second safety belt 220 are passed between the first clamping roller 120 and the second clamping roller 140. Then, the second spring is installed, and the first end cap 230 and the second end cap 240 are covered to complete the installation of the retractable device 1000. The retractable device 1000 is then installed onto the headrest 20, and then the headrest 20 is installed onto the backrest 10 to complete the installation of the child safety seat retractable device 1000.

[0073] In summary, the dual seat belt synchronous movement mechanism includes a mounting base 110, a first clamping roller 120, and a second clamping roller 140. The first clamping roller 120 is rotatably disposed on the mounting base 110, and the second clamping roller 140 is rotatably disposed on the mounting base 110 and slidably disposed on the mounting base 110 to move closer to or further away from the first clamping roller 120. The second clamping roller 140 is used to simultaneously clamp the first seat belt 210 and the second seat belt 220 when it is close to the first clamping roller 120.

[0074] This dual seatbelt synchronous motion mechanism can be used in the winding mechanism 200 (i.e., the dual seatbelt automatic winding structure). Since the first clamping roller 120 and the second clamping roller 140 can simultaneously clamp the first seatbelt 210 and the second seatbelt 220, pulling one seatbelt (e.g., the first seatbelt 210) will cause the other seatbelt (e.g., the second seatbelt 220) to move synchronously, thus realizing the linkage of the two seatbelts. This avoids the situation where the seatbelts of the winding mechanism 200 cannot be linked, which may cause jamming or even jamming, and ensures the normal use of the winding mechanism 200.

[0075] The winding device 1000 includes a winding mechanism 200 and the aforementioned dual seat belt synchronous motion mechanism. The winding mechanism 200 has a first seat belt 210 and a second seat belt 220. A first clamping roller 120 and a second clamping roller 140 simultaneously clamp the first seat belt 210 and the second seat belt 220. The winding device 1000 has all the functions of the aforementioned dual seat belt synchronous motion mechanism.

[0076] The child safety seat includes a seat body and the aforementioned retractable device 1000, which is installed on the seat body. The child safety seat has all the functions of the aforementioned retractable device 1000.

[0077] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A dual-seatbelt synchronous motion mechanism, characterized in that, include: Mounting base (110); A first clamping roller (120) is rotatably disposed on the mounting base (110); and The second clamping roller (140) is rotatably disposed on the mounting base (110) and slidably disposed on the mounting base (110) to move closer to or further away from the first clamping roller (120). The second clamping roller (140) is used to clamp the first clamping roller (120) and the second clamping roller (140) simultaneously when they are close to the first clamping roller (120).

2. The dual seatbelt synchronous motion mechanism according to claim 1, characterized in that, The dual safety belt synchronous motion mechanism also includes an elastic device, which is disposed on the mounting base (110) and elastically abuts against the second clamping roller (140).

3. The dual seatbelt synchronous motion mechanism according to claim 1, characterized in that, The dual seat belt synchronous motion mechanism further includes a first mounting shaft (130), the first clamping roller (120) is rotatably sleeved on the first mounting shaft (130), the first mounting shaft (130) is disposed on the mounting base (110), and the peripheral wall of the first clamping roller (120) has a first extrusion tooth; The second clamping roller (140) is used to clamp the first extrusion tooth and the second clamping roller (140) simultaneously when close to the first clamping roller (120).

4. The dual seatbelt synchronous motion mechanism according to claim 3, characterized in that, The dual seat belt synchronous motion mechanism further includes a second mounting shaft (150), the second clamping roller (140) is rotatably sleeved on the second mounting shaft (150), the second mounting shaft (150) is disposed on the mounting base (110), the second mounting shaft (150) is slidably disposed on the mounting base (110), and the peripheral wall of the second clamping roller (140) has a second extrusion tooth; The second clamping roller (140) is used to clamp the first extrusion tooth and the second extrusion tooth simultaneously when close to the first clamping roller (120).

5. The dual seatbelt synchronous motion mechanism according to claim 4, characterized in that, The dual seat belt synchronous motion mechanism further includes a first elastic element (160), which is disposed on the mounting base (110) and elastically abuts against the second mounting shaft (150).

6. The dual seatbelt synchronous motion mechanism according to claim 4, characterized in that, The number of the first clamping roller (120) and the second clamping roller (140) are both two, and the two first clamping rollers (120) and the two second clamping rollers (140) are distributed at intervals; The second clamping roller (140) is used to clamp the first seat belt (210) with the first pressing tooth of one of the first clamping rollers (120) and the second pressing tooth of one of the second clamping rollers (140) when close to the first clamping roller (120), and to clamp the second seat belt (220) with the first pressing tooth of another first clamping roller (120) and the second pressing tooth of another second clamping roller (140).

7. The dual seatbelt synchronous motion mechanism according to claim 1, characterized in that, The peripheral wall of the first clamping roller (120) has a third extrusion tooth, and the peripheral wall of the second clamping roller (140) has a fourth extrusion tooth.

8. The dual seatbelt synchronous motion mechanism according to claim 1, characterized in that, The dual seat belt synchronous motion mechanism further includes a first bearing (180) and a second bearing (190), both of which are disposed on the mounting base (110); The first bearing (180) is sleeved on the end of the first clamping roller (120), and the second bearing (190) is sleeved on the end of the second clamping roller (140).

9. The dual seatbelt synchronous motion mechanism according to claim 8, characterized in that, The dual seat belt synchronous motion mechanism further includes a second elastic element (170), which is disposed on the mounting base (110) and elastically abuts against the second bearing (190).

10. A winding device (1000), characterized in that, The invention includes a winding mechanism (200) and a dual seat belt synchronous motion mechanism as described in any one of claims 1-9, wherein the winding mechanism (200) has a first seat belt (210) and a second seat belt (220), and the first clamping roller (120) and the second clamping roller (140) simultaneously clamp the first seat belt (210) and the second seat belt (220).

11. A child safety seat, characterized in that, It includes a seat body and a winding device (1000) as described in claim 10, the winding device (1000) being mounted on the seat body.

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