Double-seat belt automatic winding structure and child safety seat

Abstract

A double-seat belt automatic winding structure and a child safety seat. The double-seat belt automatic winding structure is suitable for being mounted on the child safety seat. The double-seat belt automatic winding structure comprises a support (3), a winding shaft (4), and two built-in seat belts (5). The winding shaft (4) is rotatably mounted in the support (3), and the two built-in seat belts (5) are both wound outside the winding shaft (4); and the winding shaft (4) is connected to an automatic winding and locking assembly used for simultaneously winding the two built-in seat belts (5) or simultaneously locking the two built-in seat belts (5). According to the structure, the two built-in seat belts (5) are simultaneously mounted on one winding shaft (4), so that the two built-in seat belts (5) can be simultaneously released and wound, and the structure is simple and reliable. In addition, the automatic winding and locking assembly is provided, so that under a normal vehicle condition, an occupant has a free moving space for proper movement under the restraint of the built-in seat belts, thereby improving the comfort of the child occupant; and in an abnormal vehicle condition, the movement of the built-in seat belts can be limited, thereby achieving the effects of restraining and protecting the occupant.

Description

Double safety belt automatic retraction structure and child safety seat Technical Field

[0001] The utility model relates to the technical field of automobile safety products, in particular to a double safety belt automatic retracting structure and a child safety seat. Background Art

[0002] The five-point harness of a child safety seat requires two seat belts to restrain the child, and the length of these two seat belts usually needs to be manually adjusted to ensure that the child is properly secured. Once adjusted, the two seat belts will fully restrain the child, providing maximum safety protection. However, because this full restraint restricts the child's mobility and freedom, it may cause children to feel uncomfortable in the child safety seat, which may ultimately reduce their willingness and frequency of use. Utility Model Content

[0003] In order to solve at least one aspect of the above problems, the present invention first provides a dual safety belt automatic retraction structure, which is suitable for installation on a child safety seat. The dual safety belt automatic retraction structure includes a bracket, a retraction shaft and two built-in safety belts. The retraction shaft is rotatably installed in the bracket, and the two built-in safety belts are both wound around the outside of the retraction shaft; the retraction shaft is connected to an automatic retraction and locking assembly for simultaneously retracting the two built-in safety belts or simultaneously locking the two built-in safety belts.

[0004] Optionally, the child safety seat includes a seat back and a buckle provided on the front side of the seat back, the two built-in safety belts are suitable for detachable connection with the buckle, and the automatic retraction and locking assembly includes a coil spring and a locking assembly, the coil spring and the locking assembly are respectively connected to the two ends of the retraction shaft, and the retraction shaft rotates forward and reverse following the tension and relaxation of the coil spring. When the two built-in safety belts are released and pulled out, the retraction shaft rotates forward and tightens the coil spring until the two built-in safety belts are connected to the buckle. After the buckle is locked, the built-in seat belts are tightened under the spring force of the coil spring. When the two built-in seat belts are disengaged from the buckle, the reel-up shaft rotates in the opposite direction under the spring force of the coil spring to drive the built-in seat belts to be reeled. The locking assembly has a locked state and an unlocked state. Under normal vehicle conditions, the locking assembly is in an unlocked state to allow the two built-in seat belts to be freely released or reeled. Under abnormal vehicle conditions, the locking assembly is in a locked state to limit the movement of the two built-in seat belts.

[0005] Optionally, the child safety seat includes a seat back, the seat back is movably connected to a headrest, and the bracket is connected to the headrest.

[0006] Optionally, the headrest and the bracket are respectively located on the front and rear sides of the chair back, the chair back is provided with a guide rail, and the bracket is provided with a connecting rod slidably connected to the guide rail, and the connecting rod passes through the guide rail and is connected to the headrest.

[0007] Optionally, the headrest is provided with two seat belt outlets, and the two seat belt outlets are respectively used for the two self-carried seat belts to pass through.

[0008] Optionally, the bracket is provided with two installation cavities for placing the built-in safety belt, and the two installation cavities are spaced apart.

[0009] Optionally, the locking assembly includes a fixed gear plate and interconnected eccentric ratchet teeth and a torsion spring, the fixed gear plate is connected to the bracket, and the eccentric ratchet teeth are connected to the winding shaft; when at normal vehicle speed, the eccentric ratchet teeth are spaced apart from the fixed gear plate under the action of the spring force of the torsion spring to enable the eccentric ratchet teeth to rotate freely relative to the fixed gear plate; when the vehicle speed changes abnormally, the eccentric ratchet teeth are engaged and locked with the fixed gear plate under the action of centrifugal force to limit the rotation of the winding shaft.

[0010] Optionally, the locking assembly further includes a flywheel connected to the torsion spring and an angle adjustment assembly suitable for locking with the flywheel; when the angle of the chair back is normally installed, the angle adjustment assembly is spaced apart from the flywheel, and the eccentric ratchet teeth are spaced apart from the fixed gear plate under the action of the spring force of the torsion spring, so as to enable the eccentric ratchet teeth to rotate freely relative to the fixed gear plate; when the angle of the chair back changes abnormally, the angle adjustment assembly is locked with the flywheel, and the flywheel drives the torsion spring to twist so that the eccentric ratchet teeth engage and lock with the fixed gear plate to limit the rotation of the winding shaft.

[0011] Optionally, the angle adjustment assembly includes a locking block, an iron ball and a ball socket for movably placing the iron ball, one end of the locking block is hingedly connected to the ball socket, and a limiting tooth is provided on the circumference of the outer wall of the flywheel; when the angle of the chair back changes abnormally, the iron ball presses against the locking block to make the locking block rotate relative to the ball socket, thereby locking the other end of the locking block with the limiting tooth.

[0012] Compared with the prior art, the dual safety belt automatic retraction structure in the present invention installs two built-in safety belts on one retraction shaft at the same time, so that the two built-in safety belts can be released and retracted at the same time, and the structure is simple and reliable; and an automatic retraction locking assembly is provided, so that under normal vehicle conditions, the occupants have space to move freely under the restraint of the built-in safety belts, and can move appropriately, thereby enhancing the comfort of child passengers; under abnormal vehicle conditions, the movement of the built-in safety belts can be restricted, thereby restraining and protecting the occupants.

[0013] In addition, the present invention provides a child safety seat, comprising the dual safety belt automatic retraction structure as described above.

[0014] Compared with the prior art, the child safety seat described in the present invention has the same advantages as the above-mentioned dual safety belt automatic retraction structure over the prior art, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a structural diagram of a child safety seat according to an embodiment of the present invention;

[0016] FIG2 is a structural diagram of a child safety seat according to an embodiment of the present invention when the headrest is at a higher position;

[0017] FIG3 is a structural diagram of the child safety seat according to an embodiment of the present invention when the headrest is in a lower position;

[0018] FIG4 is a structural diagram of the assembly of the dual safety belt automatic retraction structure and the headrest according to an embodiment of the present invention;

[0019] FIG5 is a structural diagram of the automatic retracting structure of the dual safety belts according to an embodiment of the present invention;

[0020] FIG6 is a second structural diagram of the automatic retracting structure of the dual safety belts according to an embodiment of the present invention;

[0021] FIG7 is a third structural diagram of the automatic retracting structure of the dual safety belts according to an embodiment of the present invention;

[0022] FIG8 is an exploded view of the automatic retracting structure of the dual safety belts according to an embodiment of the present invention;

[0023] FIG9 is a second exploded view of the automatic retracting structure of the dual safety belts according to an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 1. Seat back; 2. Buckle; 3. Bracket; 31. Mounting cavity; 32. Connecting rod; 4. Retraction shaft; 5. Built-in safety belt; 6. Coil spring; 7. Locking assembly; 71. Fixed gear plate; 72. Eccentric ratchet teeth; 73. Torsion spring; 74. Flywheel; 741. Limiting teeth; 75. Angle adjustment assembly; 751. Locking block; 752. Iron ball; 753. Ball seat; 8. Headrest; 81. Safety belt outlet. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0027] In the description of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate positions or location relationships based on the positions or location relationships during normal use of the product.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0029] An embodiment of the present utility model provides a dual safety belt automatic retraction structure, as shown in Figures 1 to 9, which is suitable for installation on a child safety seat. The dual safety belt automatic retraction structure includes a bracket 3, a retraction shaft 4 and two built-in safety belts 5. The retraction shaft 4 is rotatably installed in the bracket 3, and the two built-in safety belts 5 are both wound around the outside of the retraction shaft 4; the retraction shaft 4 is connected to an automatic retraction and locking assembly for simultaneously retracting the two built-in safety belts 5 or simultaneously locking the two built-in safety belts 5.

[0030] Among them, the two built-in safety belts 5 are respectively connected and fixed to the child safety seat, so that the two built-in safety belts 5 have a design similar to a shoulder strap, which is convenient for children to wear; in addition, the two built-in safety belts 5 can also be detachably connected to the buckle 2 on the front side of the seat back 1. When the child sits on the child safety seat, the built-in safety belts 5 are pulled to connect and fix with the buckle. When the child needs to get off the child safety seat, the built-in safety belts 5 are separated from the buckle, so that the built-in safety belts can be automatically retracted.

[0031] The dual safety belt automatic retraction structure in this embodiment installs two built-in safety belts 5 on one retraction shaft 4 at the same time, so that the two built-in safety belts 5 can be released and retracted at the same time, and the structure is simple and reliable; and an automatic retraction locking component is provided, so that under normal vehicle conditions, the occupants have space to move freely under the restraint of the built-in safety belts 5, and can move appropriately, thereby enhancing the comfort of child passengers; under abnormal vehicle conditions, the movement of the built-in safety belts 5 can be restricted, thereby restraining and protecting the occupants.

[0032] Optionally, in combination with Figures 1 to 9, the child safety seat includes a seat back 1 and a buckle 2 provided on the front side of the seat back 1, the dual safety belt automatic retraction structure includes a bracket 3, a retraction shaft 4 and two built-in safety belts 5, the two built-in safety belts 5 are suitable for being detachably connected to the buckle 2, the retraction shaft 4 is rotatably installed in the bracket 3, and the two built-in safety belts 5 are wound around the outside of the retraction shaft 4 at intervals; the two ends of the retraction shaft 4 are respectively connected to a coil spring 6 and a locking assembly 7, the retraction shaft 4 rotates forward and backward following the tension and relaxation of the coil spring 6, and when the two built-in safety belts 5 are released and pulled out, the retraction shaft 4 rotates forward and backward The locking assembly 7 is in an unlocked state and a reverse state, and the locking assembly 7 is in an unlocked state when the vehicle is in a normal condition and the two safety belts 5 are freely released or retracted, and the locking assembly 7 is in a locked state when the vehicle is in an abnormal condition and the two safety belts 5 are restricted from moving.

[0033] When the user pulls the self-contained safety belt 5 to connect with the buckle 2, the reel 4 rotates forward to tighten the reel spring 6. When the user releases his hand after the self-contained safety belt 5 is fastened, the reel spring 6 is tightened. The spring force of the self-contained seat belt 5 expands and drives the reel shaft 4 to rotate in the opposite direction, thereby retracting the self-contained seat belt 5 until it fits the occupant. At this time, the coil spring 6 still has a certain spring force. When the self-contained seat belt 5 is disengaged from the buckle 2, the spring force of the coil spring 6 causes the reel shaft 4 to rotate in the opposite direction and retract the self-contained seat belt 5 until it returns to its original position. Abnormal vehicle conditions in this embodiment include abnormal speed changes and abnormal changes in the seat back 1 angle. Under normal vehicle conditions, the two self-contained seat belts 5 can be freely released from external forces. After the external force is removed, they can be automatically retracted by the spring force of the coil spring 6. In addition, the coil spring 6 and the locking assembly 7 can also be arranged at the same end of the reel shaft 4.

[0034] The dual safety belt automatic retraction structure in this embodiment installs two built-in safety belts 5 on a retraction shaft 4 at the same time, so that the two built-in safety belts 5 can be released and retracted at the same time, and the structure is simple and reliable; and a locking assembly 7 is provided, so that under normal vehicle conditions, the occupants have space to move freely under the restraint of the built-in safety belts 5, and can move appropriately, thereby enhancing the comfort of child passengers; under abnormal vehicle conditions, the movement of the built-in safety belts 5 can be restricted, thereby restraining and protecting the occupants.

[0035] Optionally, in combination with Figures 1 to 4, the chair back 1 is movably connected to the headrest 8, the bracket 3 is connected to the headrest 8, and the relative positions between the headrest 8 and the bracket 3 are fixed; as the height of the headrest 8 is adjusted, the dual safety belt automatic retraction structure will also adjust the height synchronously to adapt to children of different age groups, thereby ensuring that the path of the built-in safety belt 5 will not change, so as to ensure the automatic retraction effect.

[0036] Optionally, in combination with Figures 1 to 4, the headrest 8 and the bracket 3 are respectively located on the front and rear sides of the seat back 1, the seat back 1 is provided with a guide rail (not marked in the figure), and the bracket 3 is provided with a connecting rod 32 slidably connected to the guide rail, and the connecting rod 32 passes through the guide rail and is connected to the headrest 8.

[0037] Among them, the length direction of the guide rail is consistent with the up and down direction. When the connecting rod 32 moves up and down along the guide rail, the height adjustment of the headrest 8 can be realized; the number of connecting rods 32 is two, and the two connecting rods 32 are arranged at intervals, and the corresponding number of guide rails is also two. The guide rails and the connecting rods 32 are used in conjunction with each other, so that the height adjustment process of the headrest 8 is smooth and reliable.

[0038] Optionally, as shown in Figure 1, the headrest 8 is provided with two seat belt outlets 81, and the two seat belt outlets 81 are respectively used for the two built-in seat belts 5 to pass through; the two seat belt outlets 81 are arranged at intervals from each other so that the two built-in seat belts 5 will not interfere with each other during movement. The seat belt outlets 81 are set on the headrest 8 that can move relative to the seat back 1, so that when the headrest 8 moves, the path passed by the built-in seat belt 5 does not change, ensuring that the friction force remains unchanged, thereby ensuring a better automatic retraction effect.

[0039] Optionally, as shown in FIG8 , the bracket 3 is provided with two installation cavities 31 for placing the self-contained safety belts 5. The two installation cavities 31 are arranged at intervals, so that the two self-contained safety belts (5) can be wound around the outside of the reeling shaft (4) at intervals to prevent mutual interference; the reeling shaft 4 passes through the two installation cavities 31 and is rotatably connected to the bracket 3. The two installation cavities 31 are arranged at intervals to ensure the independence of the two self-contained safety belts 5, prevent mutual interference, and ensure that the two self-contained safety belts 5 are released and reeled synchronously with the reeling shaft 4; the arrangement of the installation cavities 31 can not only protect the self-contained safety belts 5 and extend the service life of the self-contained safety belts 5, but also make the overall structure more compact and occupy less space.

[0040] Optionally, in combination with Figures 5 to 9, the locking assembly 7 includes a fixed gear plate 71 and interconnected eccentric ratchet teeth 72 and a torsion spring 73, the fixed gear plate 71 is connected to the bracket 3, and the eccentric ratchet teeth 72 are connected to the winding shaft 4; when at normal vehicle speed, the eccentric ratchet teeth 72 are spaced apart from the fixed gear plate 71 under the action of the spring force of the torsion spring 73, so as to enable the eccentric ratchet teeth 72 to rotate freely relative to the fixed gear plate 71; when the vehicle speed changes abnormally, the eccentric ratchet teeth 72 are engaged and locked with the fixed gear plate 71 under the action of centrifugal force to limit the rotation of the winding shaft 4.

[0041] Among them, the other end of the reel-up shaft 4 is connected to the locking assembly 7, and the unlocking and locking of the locking assembly 7 are used to control the rotation and stopping of the reel-up shaft 4, thereby driving the free stretching, release and emergency locking of the seat belt; the situation where the vehicle speed changes abnormally includes the situation where the vehicle accelerates or decelerates instantly; the fixed gear plate 71 is provided with an internal ratchet suitable for cooperating with the eccentric ratchet teeth 72, the fixed gear plate 71 is connected and fixed to the bracket 3, and the eccentric ratchet teeth 72 can rotate relative to the bracket 3; at normal vehicle speed, under the action of the torsion spring 73, the eccentric ratchet teeth 72 and the fixed gear plate 71 are freely movable, and the built-in seat belt 5 can move freely at this time; when the vehicle speed changes abnormally, at the moment when the built-in seat belt 5 is pulled out, the eccentric ratchet teeth 72 overcome the torsion of the torsion spring 73 under the action of centrifugal force and engage and lock with the fixed gear plate 71, thereby timely driving the built-in seat belt 5 to lock and protect the safety of the occupants.

[0042] Optionally, in combination with Figures 5 to 9, the locking assembly 7 further includes a flywheel 74 connected to the torsion spring 73 and an angle adjustment assembly 75 suitable for locking with the flywheel 74; when the angle of the chair back 1 is normally installed, the angle adjustment assembly 75 is spaced apart from the flywheel 74, and the eccentric ratchet teeth 72 are spaced apart from the fixed gear plate 71 under the spring force of the torsion spring 73, so as to enable the eccentric ratchet teeth 72 to rotate freely relative to the fixed gear plate 71; when the angle of the chair back 1 changes abnormally, the angle adjustment assembly 75 is locked with the flywheel 74, and the flywheel 74 drives the torsion spring 73 to twist so that the eccentric ratchet teeth 72 engage and lock with the fixed gear plate 71 to limit the rotation of the reeling shaft 4.

[0043] Among them, the angle adjustment component 75 can sense abnormal changes in the angle of the seat back 1 itself, restrain the occupant in an emergency, and ensure the safety of the child; specifically, when the child safety seat is normally installed, under the action of the torsion spring 73, the eccentric ratchet teeth 72 and the fixed gear plate 71 are freely movable, and the built-in safety belt 5 can move freely at this time; when the angle of the seat back 1 changes abnormally, such as when the vehicle goes up and down a steep slope, or even flips over, the angle adjustment component 75 will engage and lock with the flywheel 74 in time, and the flywheel 74 will drive the eccentric ratchet teeth 72 to lock and engage with the fixed gear plate 71, thereby driving the built-in safety belt 5 to lock in time, further improving safety.

[0044] Optionally, in combination with Figures 5 to 9, the angle adjustment assembly 75 includes a locking block 751, an iron ball 752 and a ball seat 753 for movably placing the iron ball 752, one end of the locking block 751 is hingedly connected to the ball seat 753, and a limiting tooth 741 is provided on the circumference of the outer wall of the flywheel 74; when the angle of the chair back 1 changes abnormally, the iron ball 752 presses against the locking block 751 to make the locking block 751 rotate relative to the ball seat 753, so that the other end of the locking block 751 is locked with the limiting tooth 741.

[0045] Among them, there is a certain amount of movable space in the ball seat 753, and the iron ball 752 can move freely in the ball seat 753, but due to the restriction of the locking block 751, the iron ball 752 will not roll out of the ball seat 753; when the angle of the chair back 1 is normal, the iron ball 752 does not contact the locking block 751. When the angle of the chair back 1 changes abnormally, the iron ball 752 will move toward the locking block 751 and push the locking block 751 to rotate around the hinge point with the ball seat 753, so that the other end of the locking block 751 is clamped and locked with the limiting tooth 741 of the flywheel 74, and then the flywheel 74 drives the eccentric ratchet tooth 72 to lock and engage with the fixed gear plate 71, thereby timely driving the built-in safety belt 5 to lock.

[0046] Another embodiment of the present invention provides a child safety seat, comprising the dual safety belt automatic retraction structure as described above.

[0047] In the child safety seat of this embodiment, two built-in safety belts 5 are installed on a reeling shaft 4 at the same time, so that the two built-in safety belts 5 can be released and reeled at the same time, and the structure is simple and reliable; and a locking assembly 7 is provided, so that under normal vehicle conditions, the occupant has space to move freely under the restraint of the built-in safety belts 5, and can move appropriately, thereby enhancing the comfort of the child occupant; under abnormal vehicle conditions, the movement of the built-in safety belts 5 can be restricted, thereby playing the role of restraining and protecting the occupant.

[0048] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present utility model.

Claims

1. A dual safety belt automatic retracting structure, suitable for installation in a child safety seat, characterized in that: The dual safety belt automatic retracting structure comprises a bracket (3), a retracting shaft (4) and two built-in safety belts (5); the retracting shaft (4) is rotatably installed in the bracket (3), and the two built-in safety belts (5) are both wound around the outside of the retracting shaft (4); the retracting shaft (4) is connected to an automatic retracting and locking assembly for simultaneously retracting the two built-in safety belts (5) or simultaneously locking the two built-in safety belts (5).

2. The dual safety belt automatic retracting structure according to claim 1, characterized in that: The child safety seat comprises a seat back (1) and a buckle (2) arranged on the front side of the seat back (1); the two built-in safety belts (5) are suitable for being detachably connected to the buckle (2); the automatic retracting and locking assembly comprises a coil spring (6) and a locking assembly (7); the coil spring (6) and the locking assembly (7) are respectively connected to the two ends of the retracting shaft (4); the retracting shaft (4) realizes positive and negative rotation following the tension and relaxation of the coil spring (6); when the two built-in safety belts (5) are released and pulled out, the retracting shaft (4) rotates forward and causes the coil spring (6) to be tightened until the two built-in safety belts (5) are in contact with the retracting shaft (4). After the buckle (2) is locked, the built-in safety belt (5) is tightened under the spring force of the coil spring (6); when the two built-in safety belts (5) are detached from the buckle (2), the reeling shaft (4) realizes reverse rotation under the spring force of the coil spring (6) to drive the built-in safety belt (5) to be reeled; the locking assembly (7) has a locked state and an unlocked state; in normal vehicle conditions, the locking assembly (7) is in the unlocked state to allow the two built-in safety belts (5) to be freely released or reeled; in abnormal vehicle conditions, the locking assembly (7) is in the locked state to restrict the movement of the two built-in safety belts (5).

3. The dual safety belt automatic retracting structure according to claim 1, characterized in that: The child safety seat comprises a seat back (1), the seat back (1) is movably connected to a headrest (8), and the bracket (3) is connected to the headrest (8).

4. The dual safety belt automatic retracting structure according to claim 3, characterized in that: The headrest (8) and the bracket (3) are respectively located at the front and rear sides of the chair back (1); the chair back (1) is provided with a guide rail; the bracket (3) is provided with a connecting rod (32) slidably connected to the guide rail; the connecting rod (32) passes through the guide rail and is connected to the headrest (8).

5. The dual safety belt automatic retracting structure according to claim 3, characterized in that: The headrest (8) is provided with two safety belt outlets (81), and the two safety belt outlets (81) are respectively used for the two self-contained safety belts (5) to pass through.

6. The dual safety belt automatic retracting structure according to claim 1, characterized in that: The bracket (3) is provided with two installation cavities (31) for placing the self-contained safety belt (5), and the two installation cavities (31) are arranged at intervals.

7. The dual safety belt automatic retracting structure according to any one of claims 2 to 6, characterized in that: The locking assembly (7) comprises a fixed gear plate (71) and mutually connected eccentric ratchet teeth (72) and a torsion spring (73); the fixed gear plate (71) is connected to the bracket (3), and the eccentric ratchet teeth (72) are connected to the reeling shaft (4); when the vehicle is at a normal speed, the eccentric ratchet teeth (72) are spaced apart from the fixed gear plate (71) under the action of the spring force of the torsion spring (73), so that the eccentric ratchet teeth (72) can rotate freely relative to the fixed gear plate (71); when the vehicle speed changes abnormally, the eccentric ratchet teeth (72) are meshed and locked with the fixed gear plate (71) under the action of centrifugal force, so as to limit the rotation of the reeling shaft (4).

8. The dual safety belt automatic retracting structure according to claim 7, characterized in that: The locking assembly (7) further comprises a flywheel (74) connected to the torsion spring (73) and an angle adjustment assembly (75) suitable for being locked with the flywheel (74); when the angle of the chair back (1) is normally installed, the angle adjustment assembly (75) is spaced apart from the flywheel (74), and the eccentric ratchet teeth (72) are spaced apart from the fixed gear plate (71) under the action of the spring force of the torsion spring (73) so as to realize the free rotation of the eccentric ratchet teeth (72) relative to the fixed gear plate (71); when the angle of the chair back (1) changes abnormally, the angle adjustment assembly (75) is locked with the flywheel (74), and the flywheel (74) drives the torsion spring (73) to twist so that the eccentric ratchet teeth (72) are meshed and locked with the fixed gear plate (71) to limit the rotation of the reeling shaft (4).

9. The dual safety belt automatic retracting structure according to claim 8, characterized in that: The angle adjustment assembly (75) comprises a locking block (751), an iron ball (752) and a ball seat (753) for movably placing the iron ball (752); one end of the locking block (751) is hingedly connected to the ball seat (753); and a limiting tooth (741) is provided on the circumference of the outer wall of the flywheel (74); when the angle of the chair back (1) changes abnormally, the iron ball (752) presses against the locking block (751) to make the locking block (751) rotate relative to the ball seat (753), so that the other end of the locking block (751) is locked with the limiting tooth (741).

10. A child safety seat, characterized in that: It comprises a dual safety belt automatic retracting structure as described in any one of claims 1 to 9.

Images