Belt tightening mechanism and safety seat

Abstract

The belt tightening mechanism comprises a mounting seat, a wrench and a pressing block, the wrench and the pressing block are rotatably arranged on the mounting seat, a tensioning cavity is formed in the mounting seat, the pressing block is suitable for rotatably entering and exiting the tensioning cavity, the pressing block is suitable for being matched with the tensioning cavity to tighten a safety belt, and a first combining part is arranged at the end, close to the pressing block, of the wrench; the end, close to the wrench, of the pressing block is provided with a second combination part, the wrench is suitable for rotating in the first direction so that the first combination part can make contact with the second combination part in a matched mode, and the wrench is suitable for further rotating in the first direction so that the pressing block can be close to or enter the tensioning cavity. And an operation force arm is prolonged, so that the pressing block can more easily press, tension and fix the safety belt.

Description

Technical Field

[0001] This application relates to the field of child safety seat technology, specifically to a strap mechanism and a child safety seat. Background Technology

[0002] A car seat is a seat designed specifically for children of different weights (or ages) and installed in a car to effectively improve the safety of children while riding in the car. It is also called a child seat. Some car seats are designed to be secured to the base by the car's seat belt to ensure the car seat is firmly fixed in the car seat. They are also connected with ISOFIX connectors to improve the stability of the car seat.

[0003] However, existing child safety seats have the following drawbacks: common child safety seats tighten the seat belt on the base by pressing down, which is usually quite laborious. They also require a certain amount of gap between the base and the seat, making the overall size of the child safety seat larger, increasing the difficulty of installation, and taking up more interior space. Utility Model Content

[0004] One object of this application is to provide a strapping mechanism and a safety seat that are easy to operate and have a compact structure.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a tensioning mechanism, including a mounting base, a wrench, and a pressure block. The wrench and the pressure block are rotatably mounted on the mounting base. The mounting base is provided with a tensioning cavity. The pressure block is adapted to rotate in and out of the tensioning cavity. The pressure block is adapted to cooperate with the tensioning cavity to tension the seat belt. The wrench has a first engagement portion near the end of the pressure block and a second engagement portion near the end of the pressure block. The wrench is adapted to rotate in a first direction so that the first engagement portion and the second engagement portion engage and contact. The wrench is also adapted to rotate further in the first direction so that the pressure block approaches or enters the tensioning cavity.

[0006] In some embodiments, the mounting base is provided with a rotating shaft, the wrench and the pressure block are rotatably connected to the rotating shaft, the first joint and the second joint are rib structures, the first joint and the second joint are adapted to make circumferential contact with the rotating shaft; a tension gap is adapted to be formed between the pressure block and the tensioning cavity, the safety belt is adapted to be accommodated in the tension gap, and the tension gap is not less than the thickness of the safety belt.

[0007] In some embodiments, a first elastic resetter is provided on the rotating shaft, the first elastic resetter being adapted to rotate the wrench and / or the pressure block so that the first joint and the second joint move closer to each other.

[0008] In some embodiments, the mounting base is provided with a rotatable locking block, and a second elastic resetter is provided at the first end of the locking block. The second elastic resetter is adapted to bring the first end of the locking block closer to the end of the pressure block away from the rotating shaft, and the first end of the locking block is adapted to engage with the end of the pressure block away from the rotating shaft to restrict the pressure block from moving away from the mounting base.

[0009] In some embodiments, a release cord is connected to the second end of the locking block, the release cord being adapted to rotate the locking block and move the first end of the locking block away from the pressure block; the end of the release cord away from the locking block extends from the top or rear of the mounting base to the outside.

[0010] In some embodiments, the first end of the locking block is provided with a snap-fit ​​hook, the pressure block is provided with a snap-fit ​​groove, the second elastic reset member is adapted to allow the snap-fit ​​hook to enter the tensioning cavity, the snap-fit ​​hook is adapted to engage with the snap-fit ​​groove in a first direction; the snap-fit ​​hook is provided with a guide slope, the pressure block is adapted to contact the guide slope when entering the tensioning cavity, and push the first end of the locking block away; the pressure block is provided with a hook portion protruding from the end away from the rotating shaft and near the mounting base.

[0011] In some embodiments, the mounting base is provided with a third elastic resetter, which is connected to the wrench and is adapted to rotate the wrench toward the first engagement portion in a direction away from the second engagement portion.

[0012] In some embodiments, one end of the pressure block is rotatably connected to one side of the tensioning cavity, and the other end of the pressure block is adapted to enter and exit the tensioning cavity along the depth direction of the tensioning cavity; the tensioning cavity is at least adapted to completely accommodate the pressure block; the mounting base has a receiving cavity, which is at least adapted to completely accommodate the wrench.

[0013] In some embodiments, an operating gap is formed between the end of the wrench away from the pressure block and the receiving cavity; an operating ramp is provided on the side of the wrench away from the pressure block and located inside the receiving cavity, the operating ramp being adapted to increase the operating gap formed between the wrench and the receiving cavity inside the receiving cavity.

[0014] A safety seat includes any of the above-described tensioning mechanisms, the mounting base being the base of the safety seat, and the pressure block being adapted to accommodate the vehicle seat belt within the tensioning cavity.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: The tensioning mechanism and safety seat of this application are linked by setting a wrench and a pressure block to change the action that the user needs to perform to tighten the seat belt, and the wrench is used to extend the lever arm when the pressure block is used to tighten the seat belt, thereby effectively reducing the force that the user needs to use to operate the pressure block to tighten the seat belt and improving the user's operating experience. At the same time, the separate connection of the wrench and the pressure block can make the arrangement of the tensioning mechanism more flexible and compact. Attached Figure Description

[0016] Figure 1 This is an overall structural view according to a preferred embodiment of the present application.

[0017] Figure 2 This is an exploded structural view according to a preferred embodiment of this application.

[0018] Figure 3 This is a structural diagram of the seat belt before it is tightened, according to a preferred embodiment of this application.

[0019] Figure 4 This is a structural diagram of a preferred embodiment of the present application when the seat belt is tightened.

[0020] Figure 5 This is a schematic diagram of the structure after the seat belt is tightened according to a preferred embodiment of this application.

[0021] Figure 6 This is a schematic diagram of the engagement of the seat belt and the pressure block when tightening the seat belt according to a preferred embodiment of this application.

[0022] Figure 7 This is an internal schematic diagram of the seat belt before it is tightened, according to a preferred embodiment of this application.

[0023] Figure 8 This is an internal schematic diagram of the seat belt being tightened according to a preferred embodiment of this application.

[0024] Figure 9 This is an internal schematic diagram of the seat belt after it has been tightened, according to a preferred embodiment of this application.

[0025] Figure 10 This is a schematic diagram of the connection between the wrench and the pressure block according to a preferred embodiment of this application.

[0026] In the diagram: 1. Mounting base; 11. Tensioning cavity; 111. Tensioning gap; 12. Rotating shaft; 121. First elastic resetter; 13. Locking block; 131. Snap hook; 1311. Guide slope; 14. Second elastic resetter; 15. Release rope; 16. Third elastic resetter; 17. Receiving cavity; 171. Operating gap; 2. Wrench; 21. First joint; 22. Operating slope; 3. Pressure block; 31. Second joint; 32. Snap groove; 33. Hook joint; 4. Safety belt. Detailed Implementation

[0027] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. They should not be construed as limiting the specific protection scope of this application.

[0029] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0030] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0031] The following description, in conjunction with the accompanying drawings, further illustrates this application:

[0032] like Figures 1 to 10As shown, this application provides a tensioning mechanism, including a mounting base 1, a wrench 2, and a pressure block 3. The wrench 2 and the pressure block 3 are rotatably mounted on the mounting base 1. The mounting base 1 is provided with a tensioning cavity 11. The pressure block 3 is adapted to rotate to enter and exit the tensioning cavity 11. The pressure block 3 is adapted to cooperate with the tensioning cavity 11 to tension the safety belt 4. It can be understood that the principle of this tensioning mechanism is as follows: when the safety belt 4 is placed between the pressure block 3 and the tensioning cavity 11, when the pressure block 3 rotates closer to the tensioning cavity 11, the safety belt 4 is adapted to be pressed by the pressure block 3 to the tensioning cavity 11 and become tensioned. As the pressure block 3 enters the tensioning cavity 11, the tension of the safety belt 4 is adapted to gradually increase.

[0033] The wrench 2 has a first engagement portion 21 near the end of the pressure block 3, and the pressure block 3 has a second engagement portion 31 near the end of the wrench 2. The wrench 2 is adapted to move in a first direction (with... Figures 7 to 10 For example, rotating the first direction (clockwise) causes the first connecting part 21 to engage with the second connecting part 31. Between the engagement of the first connecting part 21 and the second connecting part 31, the movement of the wrench 2 will not cause the pressure block 3 to move. The wrench 2 is suitable for further rotation along the first direction, so that the pressure block 3 approaches or enters the tensioning chamber 11. When the wrench 2 rotates in the opposite direction of the first direction (clockwise), the wrench 2 will not engage with the pressure block 3. Figures 7 to 10 For example, when the first direction is rotated (the opposite direction of the first direction is counterclockwise), the first joint 21 and the second joint 31 disengage, and the action of the wrench 2 will not affect the action of the pressure block 3.

[0034] like Figure 6 In the embodiment shown, when the pressure block 3 enters the tensioning cavity 11, a tension gap 111 is formed between the pressure block 3 and the tensioning cavity 11. The tension gap 111 is not less than the thickness of the seat belt 4. The seat belt 4 is adapted to be accommodated in the tension gap 111, so that the seat belt 4 will not cause structural interference to the combination of the pressure block 3 and the tensioning cavity 11. The pressure block 3 and the tensioning cavity 11 are combined with each other, so that the seat belt 4 can deform between the pressure block 3 and the tensioning cavity 11, thereby reducing the length of the seat belt 4 outside the tensioning cavity 11. When the length of the seat belt 4 is fixed, the tightening of the seat belt 4 can be achieved to a certain extent.

[0035] like Figures 1 to 2 In the embodiments shown in 7 to 10, a rotating shaft 12 is provided on the mounting base 1, and the wrench 2 and the pressure block 3 are rotatably connected to the rotating shaft 12. The first joint 21 and the second joint 31 are rib structures. The first joint 21 and the second joint 31 are adapted to make contact with the rotating shaft 12 in the circumferential direction. The rotating shaft 12, the first joint 21 and the second joint 31 are adapted to cooperate with each other to form a lever structure. In this application, the length of the wrench 2 is greater than the length of the pressure block 3, and the length of the wrench 2 is usually several times the length of the pressure block 3. When the wrench 2 is pulled, the transmission of force can be increased and amplified through the lever principle, making the pressing process of the pressure block 3 easier.

[0036] like Figure 2 , 3 In the embodiment shown in Figure 7, a first elastic resetter 121 is provided on the rotating shaft 12. The first elastic resetter 121 is adapted to rotate the wrench 2 and / or the pressure block 3 so that the first joint 21 and the second joint 31 approach each other. The main purpose of the first elastic resetter 121 is to enable the pressure block 3 to rotate outward from the tensioning cavity 11 on its own when there is no external force, such as when the pressure block 3 is in the tensioning cavity 11 without damping or other structural restrictions. Since the wrench 2 and the pressure block 3 have a free stroke before the first joint 21 and the second joint 31 come into contact, the pressure block 3 can rotate outward from the tensioning cavity 11 on its own when the position of the wrench 2 is fixed, thus facilitating the entry of the seat belt 4 between the pressure block 3 and the tensioning cavity 11.

[0037] In some embodiments, the first elastic resetter 121 is a torsion spring, and the two ends of the torsion spring are fixedly connected to the wrench 2 and the pressure block 3, respectively.

[0038] like Figure 2 , 7 In the embodiments shown in 8 and 9, a rotatable locking block 13 is provided on the mounting base 1. A second elastic resetter 14 is provided at the first end of the locking block 13. The second elastic resetter 14 is adapted to bring the first end of the locking block 13 close to the end of the pressure block 3 away from the rotating shaft 12. The first end of the locking block 13 is adapted to engage with the end of the pressure block 3 away from the rotating shaft 12. Since the pressure block 3 approaches or enters the tensioning cavity 11 in the first direction, the locking block 13 and the pressure block 3 need to be engaged at least in the first direction to limit the pressure block 3 from moving away from the mounting base 1. The locking block 13 can stabilize the tensioning effect of the pressure block 3 on the seat belt 4 at the tensioning cavity 11, reducing the probability that the pressure block 3 will be disengaged or move away from the tensioning cavity 11 due to the reaction force of the seat belt 4.

[0039] In some embodiments, the second elastic resetter 14 is a compression spring adapted to prevent the first end of the locking block 13 from moving away from the end of the pressing block 3 away from the rotating shaft 12.

[0040] like Figures 7 to 9 In the embodiment shown, the second end of the locking block 13 is connected to a release rope 15. The release rope 15 is adapted to make the locking block 13 rotate against the elasticity of the second elastic resetter 14, so that the first end of the locking block 13 moves away from the pressure block 3. The locking block 13 can be remotely controlled to release the pressure block 3 through the release rope 15. Due to the flexible structural characteristics of the release rope 15, the arrangement can be more flexible and it is not easy to cause structural interference.

[0041] In some embodiments, the release cord 15 extends from the top or rear of the mounting base 1 to the outside at one end away from the locking block 13. When the mounting base 1 is the base of a car seat, the top or rear of the mounting base 1 is generally unobstructed, and the release cord 15 extending from the top or rear of the mounting base 1 makes it easier for the user to operate.

[0042] like Figures 7 to 9 In the embodiment shown, the first end of the locking block 13 is provided with a snap hook 131, and the pressure block 3 is provided with a snap groove 32. The second elastic reset member is adapted to allow the snap hook 131 to enter the tensioning cavity 11. The snap hook 131 is adapted to engage with the snap groove 32 in the first direction. The locking block 13 only extends a part of its end, namely the snap hook 131, into the tensioning cavity 11, which can reduce the encroachment of the locking block 13 on the internal space of the tensioning cavity 11, so that the overall structure of the tightening mechanism can be more compact.

[0043] like Figures 7 to 9 In the embodiment shown, the snap hook 131 is provided with a guide slope 1311. When the pressure block 3 enters the tensioning cavity 11, it is suitable to contact the guide slope 1311 and push the first end of the locking block 13 away. The pressure block 3 and the snap hook 131 can be more easily engaged and snapped together through the guide slope 1311, avoiding jamming.

[0044] like Figure 3 , 7 In the embodiments shown up to 10, the pressure block 3 has a hook part 33 protruding from the end away from the rotating shaft 12 and the side near the mounting base 1. The hook part 33 is used to restrict the safety belt 4 from coming off the pressure block 3 to the side away from the rotating shaft 12, so that the pressure block 3 can smoothly drive the safety belt 4 to be tensioned at the tensioning cavity 11, thereby reducing the difficulty of operation for the user.

[0045] Furthermore, the pressure block 3 is provided with a hook groove, and the hook part 33 is one side of the hook groove. The hook groove is suitable for accommodating the seat belt. The depth of the hook groove is not less than the depth of the seat belt 4, so that when the pressure block 3 abuts against the tensioning cavity 11, the seat belt 4 can be accommodated in the hook groove, reducing wear on the seat belt 4, and at the same time allowing the seat belt 4 to move and adjust within the tension gap 111 and the hook groove.

[0046] like Figure 3 , 7 In the embodiments shown up to 10, a third elastic resetter 16 is provided on the mounting base 1. The third elastic resetter 16 is connected to the wrench 2. The third elastic resetter 16 is adapted to rotate the wrench 2 toward the first joint 21 in a direction away from the second joint 31. The third elastic resetter 16 plays a reset function, which can restore the position of the wrench 2 to its original position, thereby temporarily releasing the linkage between the wrench 2 and the pressure block 3.

[0047] In some embodiments, the third elastic resetter 16 is a tension spring, which is adapted to be disposed in the tensioning cavity 11, and the two ends of the tension spring are respectively connected to the mounting base 1 and the wrench 2.

[0048] like Figure 1 , 3 In the embodiments shown in 5, 7 to 9, one end of the pressure block 3 is rotatably connected to one side of the tensioning cavity 11, and the other end of the pressure block 3 is adapted to enter and exit the tensioning cavity 11 along the depth direction of the tensioning cavity 11. One end of the pressure block 3 can form a fulcrum on one side of the tensioning cavity 11, so that the other end of the pressure block 3 can enter the tensioning cavity 11 more stably. At the same time, in this application, the depth direction of the tensioning cavity 11 is usually perpendicular to the surface of the mounting base 1. The pressure block 3 can effectively tension the safety belt 4 laid on the surface of the mounting base 1 with a large contact area, and is less likely to damage the safety belt 4.

[0049] like Figure 1 , 3 In the embodiments shown in 9, the tensioning cavity 11 is at least adapted to fully accommodate the pressure block 3, such that the pressure block 3 does not protrude from the tensioning cavity 11, thereby ensuring the flatness of the surface of the mounting base 1 at the tensioning cavity 11.

[0050] Furthermore, when the pressure block 3 enters the tensioning cavity 11, the surface of the pressure block 3 is adapted to cooperate and connect with the surface of the mounting base 1, and to keep the surface of the mounting base 1 flat.

[0051] like Figure 1 , 3 In the embodiments shown in 5, 7 to 9, the mounting base 1 has a receiving cavity 17, which is at least suitable for fully receiving the wrench 2, so that the wrench 2 does not protrude from the receiving cavity 17, thereby ensuring the flatness of the surface of the mounting base 1 at the receiving cavity 17.

[0052] Furthermore, when the wrench 2 enters the receiving cavity 17, the surface of the wrench 2 is adapted to cooperate and connect with the surface of the mounting base 1, and to keep the surface of the mounting base 1 flat.

[0053] Understandably, the dual concealed design of the wrench 2 and the pressure block 3 reduces the structure protruding from the surface of the mounting base 1, thereby reducing the space occupied by the mounting base 1. This allows the installation of the mounting base 1 and other components such as the seat to achieve tensioning operation with only a small gap, thus improving the compactness and aesthetics of the structure.

[0054] like Figures 7 to 9 In the embodiment shown, an operating gap 171 is formed between the end of the wrench 2 away from the pressure block 3 and the receiving cavity 17. The operating gap 171 is an embedded design, which makes it convenient for the user to access and control the rotation of the wrench 2, while reducing the space occupied on the outside of the mounting base 1, and making it convenient to achieve smaller gap control when the mounting base 1 and the seat are designed to be connected.

[0055] like Figures 7 to 9 In the embodiment shown, the wrench 2 is located away from the pressure block 3 and has an operating ramp 22 on one side inside the accommodating cavity 17. The operating ramp 22 is adapted to increase the operating gap 171 formed between the wrench 2 and the accommodating cavity 17, so as to further reduce the difficulty of operation and make it easier for the user to operate the wrench 2 to rotate to the outside of the accommodating cavity 17.

[0056] This application also provides a safety seat, including a base, a seat, and a tensioning mechanism according to any of the above embodiments. The mounting base 1 is the base, the seat is disposed on the base, and the pressure block 3 is adapted to accommodate the car seat belt 4 in the tensioning cavity 11.

[0057] In some embodiments, the tensioning cavity 11 and the receiving cavity 17 are disposed on the surface of the base near the seat side, and the wrench 2 and the pressure block 3 are located in the gap between the base and the seat. The user can operate the wrench 2 by reaching into the gap between the base and the seat, thereby making it easier to control the pressure block 3 to tighten the seat belt 4.

[0058] In some embodiments, the operating clearance 171 is formed above the base, allowing the user to conveniently operate the wrench 2 from above the safety seat.

[0059] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are only the principles of this application. Various changes and modifications can be made to this application without departing from the spirit and scope of this application. All such changes and modifications fall within the scope of this application as claimed. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A strap tightening mechanism, characterized by: The device includes a mounting base, a wrench, and a pressure block. The wrench and the pressure block are rotatably mounted on the mounting base, which has a tensioning cavity. The pressure block is adapted to rotate in and out of the tensioning cavity and to engage with the tensioning cavity to tension the seat belt. The wrench has a first engagement portion near the pressure block and a second engagement portion near the wrench. The wrench is adapted to rotate in a first direction to engage and contact the first engagement portion and the second engagement portion. The wrench is also adapted to rotate further in the first direction to bring the pressure block closer to or into the tensioning cavity.

2. A strapping mechanism as claimed in claim 1, characterized in that: The mounting base is provided with a rotating shaft, and the wrench and the pressure block are rotatably connected to the rotating shaft. The first joint and the second joint are rib structures, and the first joint and the second joint are adapted to make contact with the rotating shaft in the circumferential direction. A tension gap is adapted to be formed between the pressure block and the tensioning cavity, and the safety belt is adapted to be accommodated in the tension gap. The tension gap is not less than the thickness of the safety belt.

3. A strapping mechanism as claimed in claim 2, characterized in that: A first elastic reset device is provided on the rotating shaft. The first elastic reset device is adapted to rotate the wrench and / or the pressure block so that the first joint and the second joint move closer to each other.

4. A strapping mechanism as claimed in claim 3, characterized in that: The mounting base is provided with a rotatable locking block. The first end of the locking block is provided with a second elastic resetter. The second elastic resetter is adapted to bring the first end of the locking block closer to the end of the pressure block away from the rotating shaft. The first end of the locking block is adapted to engage with the end of the pressure block away from the rotating shaft to restrict the pressure block from moving away from the mounting base.

5. A strapping mechanism as claimed in claim 4, characterized in that: The second end of the locking block is connected to a release rope, which is adapted to rotate the locking block and move the first end of the locking block away from the pressure block; the end of the release rope away from the locking block extends from the top or rear of the mounting base to the outside.

6. A strap mechanism according to claim 4, wherein: The first end of the locking block is provided with a snap hook, and the pressure block is provided with a snap groove. The second elastic resetter is adapted to allow the snap hook to enter the tensioning cavity. The snap hook is adapted to engage with the snap groove in a first direction. The snap hook is provided with a guide slope. When the pressure block enters the tensioning cavity, it is adapted to contact the guide slope and push the first end of the locking block away. The end of the pressure block away from the rotating shaft and near the mounting base has a protruding hook portion.

7. A strap mechanism as claimed in claim 1, wherein: The mounting base is provided with a third elastic reset device, which is connected to the wrench and is adapted to rotate the wrench toward the first joint in a direction away from the second joint.

8. A belt tightening mechanism as described in claim 1, characterized in that: One end of the pressure block is rotatably connected to one side of the tensioning cavity, and the other end of the pressure block is adapted to enter and exit the tensioning cavity along the depth direction of the tensioning cavity; The tensioning cavity is at least adapted to fully accommodate the pressure block; the mounting base has a receiving cavity, which is at least adapted to fully accommodate the wrench.

9. A strapping mechanism as claimed in claim 8, characterized in that: An operating gap is formed between the end of the wrench away from the pressure block and the receiving cavity; an operating ramp is provided on the side of the wrench away from the pressure block and located inside the receiving cavity, and the operating ramp is adapted to increase the operating gap formed between the wrench and the receiving cavity inside the receiving cavity.

10. A safety seat, characterized by: Includes the tensioning mechanism as described in any one of claims 1 to 9, wherein the mounting base is the base of a safety seat, and the pressure block is adapted to accommodate the vehicle seat belt within the tensioning cavity.

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