Connecting belt adjusting device

Abstract

A connecting belt adjusting device comprises a base, a belt winding shaft and an adjusting assembly, and the base is provided with a belt hole for a connecting belt to go in and out; the tape winding shaft is arranged on the base; the adjusting assembly is movably arranged on the base and at least has a first position state and a second position state, a belt winding part is arranged on the adjusting assembly, and the belt winding part is configured in the mode that a connecting belt entering the belt hole can be led out from the belt hole by winding through the belt winding part; when the adjusting assembly moves from the first position state to the second position state, the belt winding part moves from the first position to the second position to force the connecting belt to wind around the belt winding shaft so as to increase the stroke length of the connecting belt in the base. According to the connecting belt adjusting device, the connecting belt can be quickly tightened by rotating the adjusting assembly, the structure is very simple, operation is convenient, structural miniaturization is facilitated, the cost can be greatly reduced, and the connecting belt adjusting device has very high practicability and is suitable for being vigorously popularized.

Description

Technical Field

[0001] This invention relates to the field of machinery, and in particular to a connecting belt adjustment device. Background Technology

[0002] A child safety seat is a seat that connects to a car seat for children to ride in, and is secured to the child by a seatbelt to ensure the child's safety. Because child safety seats can minimize the injury to children during emergency braking or accidental collisions, they were quickly accepted by consumers and have gradually become more widespread.

[0003] To ensure the safety of child safety seats, they must be securely installed in the car seat, and shaking should be avoided. Installation of child safety seats is typically achieved by connecting the ISOFIX connectors on the car seat to the corresponding connectors on the child safety seat.

[0004] Child safety seats typically have a connecting strap that is difficult for users to remove. The port of the connecting strap has a plug that matches the ISOFIX interface. During installation, first roughly adjust the length of the connecting strap, and then insert the plug into the ISO FIX interface to connect the child safety seat to the car seat.

[0005] In practice, directly inserting the plug at the end of the seatbelt into the ISO FIX connector usually cannot guarantee that the child safety seat will not wobble. Therefore, during standard installation, the connecting strap cannot be guaranteed to be fully taut, inevitably causing the installed child safety seat to wobble. To avoid any slack in the connecting strap during installation, users need to install it in a special way and at a specific angle, requiring certain installation skills to ensure the child safety seat does not wobble. This method is difficult and requires considerable effort from the user, making it difficult for the average user to learn and master. Therefore, to address this issue, several solutions have emerged on the market.

[0006] One common solution involves incorporating a winding mechanism into the connecting strap. This mechanism winds up the strap (similar to winding a measuring tape), tightening the initially slack strap. This mechanism typically includes a hand crank; cranking it tightens the strap connecting the car seat and the child safety seat, preventing the seat from wobbling. While this solution offers some convenience, allowing users to easily tighten the strap manually for stability, it has drawbacks: the winding mechanism is complex, requiring high strength to tighten the seatbelt, significantly increasing cost; furthermore, manual tightening requires multiple cranks, resulting in lower efficiency and hindering quick installation. On the other hand, when it is necessary to loosen the harness to remove the child safety seat from the car seat, the user needs to crank the harness in the opposite direction to loosen it, which is usually slow and inefficient.

[0007] In addition, there are some winding mechanisms based on other principles on the market, but they are usually complex in structure and large in size, which not only makes them inconvenient to use, but also increases their cost. Summary of the Invention

[0008] The present invention aims to solve the above problems and provides a connecting belt adjustment device that is simple in structure, easy to operate, low in cost, small in size, and can quickly tighten the connecting belt.

[0009] To address the aforementioned problems, the present invention provides a connecting belt adjustment device, characterized in that it comprises:

[0010] The base is provided with a belt hole for connecting the belt in and out;

[0011] A winding shaft is mounted on the base.

[0012] An adjustment assembly is movably disposed on the base and has at least a first position state and a second position state. The adjustment assembly is provided with a winding portion, which is configured such that a connecting strip entering the perforation can be wound around the winding portion and led out from the perforation.

[0013] When the adjustment component moves from the first position state to the second position state, the winding part moves from the first position to the second position, forcing the connecting belt to wrap around the winding shaft and increasing the travel length of the connecting belt in the base.

[0014] Furthermore, the adjustment component is rotatably mounted on the base, and the adjustment component can rotate about the central axis of the winding shaft.

[0015] Furthermore, the winding shaft is fixedly or rotatably mounted on the base, and the central axis of the winding shaft is a fixed axis.

[0016] Furthermore, the adjustment component is provided with a first through hole and a second through hole, which are distributed on both sides of the winding portion. When the connecting belt enters the base from the belt hole, the connecting belt can pass through the first through hole, wrap around the winding portion, and then pass through the second through hole to be led out from the belt hole.

[0017] Furthermore, when the connecting strip enters the base from the strip hole,

[0018] In the first position state, the connecting strip passes through the first through hole without winding around the winding shaft, passes through the second through hole after winding around the winding portion, and is led out from the strip hole without winding around the winding shaft after passing through the second through hole;

[0019] In the second position state, the connecting strip passes through the first through hole after wrapping around the wrapping shaft, passes through the second through hole after wrapping around the wrapping portion, and then passes through the second through hole and is led out from the strip hole after wrapping around the wrapping shaft.

[0020] Furthermore, the adjustment assembly includes an integrally formed rotating member, the first end of which is sleeved on the winding shaft and can rotate around the central axis of the winding shaft, the second end of which is exposed outside the base and can be used for operation, and a first through hole and a second through hole are provided between the first end and the second end of the rotating member, and the winding portion is formed between the first through hole and the second through hole.

[0021] Furthermore, the base includes a base plate and a support portion, the support portion is located on opposite sides of the base plate and protrudes relative to the support portion, the base plate is provided with the belt hole, and the belt shaft is laterally connected between the support portions;

[0022] The rotating component includes a base plate portion and a connecting portion. The connecting portion is located on opposite sides of the base plate portion and protrudes relative to the base plate portion. The base plate portion has a first through hole and a second through hole. The connecting portion is sleeved on the winding shaft and located inside the support portion.

[0023] Furthermore, in the first position state, the winding portion is opposite to the belt hole; the connecting portion is located between the base plate portion and the base plate portion; the winding shaft is biased to the side of the winding portion in the direction of rotation toward the second position state;

[0024] In the second position state, the wrapping portion is offset from the perforation; the base plate portion is located between the bottom plate portion and the connecting portion.

[0025] Furthermore, the base is provided with a bayonet;

[0026] The adjustment component can be engaged with the bayonet to lock in the second position.

[0027] Furthermore, the adjustment component includes:

[0028] A cover is fixedly disposed at the second end of the rotating component, and a movable cavity is formed between the cover and the rotating component;

[0029] A locking element is movably disposed in the movable cavity and partially exposed outside the cover and the rotating component; at least a portion of the locking element can enter the bayonet and engage with the bayonet to lock the adjusting assembly in a second position state;

[0030] An elastic element is disposed in the movable cavity and abuts against the locking element.

[0031] Furthermore, the base has a bayonet and a first guide slope at its end. The first guide slope is inclined relative to the opening direction of the bayonet. The locking member has a second guide slope. The locking member can slide along the first guide slope through the second guide slope and move into the bayonet. During the sliding of the locking member, the elastic member always has a tendency to drive the locking member to abut against the base.

[0032] Furthermore, the adjustment component can rotate 135° to 180° from the first position state to the second position state.

[0033] The beneficial contribution of this invention lies in its effective solution to the aforementioned problems. The connecting belt adjustment device of this invention can quickly tighten the connecting belt by rotating the adjustment component. Its structure is very simple and easy to operate, which not only facilitates miniaturization but also greatly reduces costs. It has strong practicality and should be widely promoted. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the adjusting component in the first position.

[0035] Figure 2 This is a schematic diagram of the structure in the second position state of the adjustment component.

[0036] Figure 3 This is a schematic diagram of the principle, in which, Figure 3 A is a schematic diagram illustrating the principle of adjusting the component in its first position. Figure 3 B is a schematic diagram illustrating the principle of adjusting the component in the second position.

[0037] Figure 4This is a schematic diagram of the overall structure.

[0038] Attached image labels:

[0039] Base 10: with holes 11, bottom plate 12, support 13, first pivot hole 131, first guide slope 132, and bayonet 133;

[0040] 20mm winding shaft;

[0041] Adjustment assembly 30: Rotating component 31, base plate portion 311, winding portion 3111, first through hole 3112, second through hole 3113, connecting portion 312, second rotating shaft hole 3121, cover 32, locking component 33, protrusion 331, second guide slope 3311, positioning post 332, elastic component 34, movable cavity 35, hollow hole 36;

[0042] Connector belt 40. Detailed Implementation

[0043] The following embodiments are further explanations and supplements to the present invention and do not constitute any limitation on the present invention.

[0044] like Figures 1-4 As shown, the connecting belt adjustment device of the present invention includes a base 10, a winding shaft 20, and an adjustment component 30.

[0045] The base 10 is provided with a strap hole 11 for the connecting strap 40 to enter and exit. The strap hole 11 can be a single through hole or two independent through holes. When the strap hole 11 is a single through hole, the connecting strap 40 can enter and exit the base 10 through the same hole. When the strap hole 11 is two independent through holes, the connecting strap 40 can enter and exit the base 10 through different holes. In this embodiment, the strap hole 11 is configured as a single through hole, and the connecting strap 40 enters and exits through the same hole.

[0046] The winding shaft 20 is disposed on the base 10 and is used to increase the travel length of the connecting belt 40 within the base 10 by allowing the connecting belt 40 to be wound around it. The winding shaft 20 can be fixedly disposed on the base 10 or movably disposed on the base 10.

[0047] The adjustment component 30 is movably mounted on the base 10 and has at least a first position state and a second position state. The adjustment component 30 can move from the first position state to the second position state and from the second position state to the first position state. The adjustment component 30 is provided with a winding portion 3111, which is configured such that the connecting belt 40 entering the belt hole 11 can be wound around the winding portion 3111 and led out from the belt hole 11. The winding portion 3111 is used to allow the connecting belt 40 to be wound around, so that the connecting belt 40 can be pulled through the winding portion 3111. When the winding portion 3111 is active, the connecting belt 40 can be pulled.

[0048] When the adjustment component 30 moves from the first position state to the second position state, the winding part 3111 moves from the first position to the second position, forcing the connecting belt 40 to wrap around the winding shaft 20, thereby increasing the travel length of the connecting belt 40 in the base 10, so that the connecting belt 40 can be tightened.

[0049] In the first position state, the effective travel length of the connecting belt 40 within the base 10 is the first travel length; in the second position state, the effective travel length of the connecting belt 40 within the base 10 is the second travel length. The second travel length is greater than the first travel length.

[0050] The effective stroke length refers to the length of the connecting belt 40 within the base 10 when the connecting belt 40 enters and exits from the belt hole 11.

[0051] In the second position, the connecting belt 40 is forced to wrap around the winding shaft 20, thereby increasing the stroke length of the connecting belt 40 within the base 10. Thus, the stroke length of the connecting belt 40 can be adjusted by adjusting the component 30, thereby loosening or tightening the connecting belt 40.

[0052] Furthermore, the adjustment component 30 is rotatably mounted on the base 10, and the adjustment component 30 can be switched between a first position state and a second position state by rotating the adjustment component 30.

[0053] Furthermore, when the adjusting component 30 rotates, it rotates around the central axis of the winding shaft 20. The central axis of the winding shaft 20 is a fixed axis, meaning that the position of the central axis of the winding shaft 20 does not change, and the adjusting component 30 rotates around the fixed axis. The winding shaft 20 can be fixedly mounted on the base 10 or rotatably mounted on the base 10. Preferably, the winding shaft 20 is rotatably mounted on the base 10.

[0054] To facilitate the threading of the connecting strap 40 and allow it to wrap around the wrapping portion 3111, a first through hole 3112 and a second through hole 3113 are provided on the adjusting assembly 30. The first through hole 3112 and the second through hole 3113 are through holes, and they are respectively distributed on both sides of the wrapping portion 3111.

[0055] When the connecting strap 40 enters the base 10 through the strap hole 11, the connecting strap 40 can first pass through the first through hole 3112, then wrap around the wrapping part 3111, then pass through the second through hole 3113, and finally be led out from the strap hole 11. In this way, the connecting strap 40 can be tightened by the wrapping part 3111 within the base 10. When the position of the wrapping part 3111 changes, the wrapping part 3111 can pull the connecting strap 40, thereby loosening or tightening the connecting strap 40. When the adjusting component 30 is rotated to move from the first position device to the second position state, the travel length of the connecting strap 40 within the base 10 increases, thus tightening the connecting strap 40.

[0056] When the adjustment component 30 is rotated from the second position device to the first position state, the travel length of the connecting belt 40 within the base 10 is reduced, thereby loosening the connecting belt 40.

[0057] Furthermore, in order to change the travel length of the connecting belt 40 within the base 10 when the winding part 3111 moves, the first through hole 3112, the second through hole 3113, the winding shaft 20, and the winding part 3111 satisfy the following conditions:

[0058] In the first position state, after the connecting belt 40 enters the base 10 through the belt hole 11, the connecting belt 40 passes directly through the first through hole 3112 without winding around the winding shaft 20. Then, it winds around the winding part 3111 and passes through the second through hole 3113. After passing through the second through hole 3113, it exits directly from the belt hole 11 without winding around the winding shaft 20. In this way, the connecting belt 40 only needs to wind around the winding part 3111 in the base 10 and does not wind around the winding shaft 20. At this time, the travel length of the connecting belt 40 in the base 10 is small, which is the first travel length. At this time, the connecting belt 40 located outside the base 10 is in a relaxed state.

[0059] In the second position, after the connecting belt 40 enters the base 10 through the belt hole 11, it first wraps around the winding shaft 20, then passes through the first through hole 3112 and around the winding portion 3111 before passing through the second through hole 3113. After passing through the second through hole 3113, it wraps around the winding shaft 20 and exits from the belt hole 11. Thus, the connecting belt 40 needs to wrap around both the winding portion 3111 and the winding shaft 20 within the base 10. At this time, the travel length of the connecting belt 40 within the base 10 increases to the second travel length. Meanwhile, the connecting belt 40 outside the base 10 is in a taut state.

[0060] Therefore, by rotating the adjusting component 30 from the first position to the second position, the winding portion 3111 moves from the first position to the second position, which in turn drives the connecting belt 40 to move within the base 10 and around the winding shaft 20. This increases the effective travel length of the connecting belt 40 within the base 10, thereby quickly tightening the connecting belt 40. Conversely, rotating the adjusting component 30 from the second position to the first position reduces the effective travel length of the connecting belt 40 within the base 10, thereby quickly loosening the connecting belt 40.

[0061] In this embodiment, the adjustment component 30 can rotate approximately 135° to 180° from the first position state to the second position state. Preferably, the adjustment component 30 can rotate approximately 180° from the first position state to the second position state, which minimizes the space occupied by the structure and facilitates structural miniaturization.

[0062] Furthermore, the adjustment assembly 30 includes an integrally formed rotating member 31. The first end of the rotating member 31 is sleeved on the winding shaft 20 and can rotate about the central axis of the winding shaft 20. The second end of the rotating member 31 is exposed outside the base 10 and can be used for operation, facilitating the user to rotate the adjustment assembly 30. A first through hole 3112 and a second through hole 3113 are provided between the first end and the second end of the rotating member 31. The first through hole 3112 and the second through hole 3113 are spaced apart, forming the winding portion 3111 between them.

[0063] The wrapping portion 3111 can be plate-shaped or non-plate-shaped. Preferably, the wrapping portion 3111 is plate-shaped.

[0064] To mount the adjusting assembly 30 and the winding shaft 20 on the base 10, the base 10 includes a base plate 12 and a support portion 13. The support portion 13 is located on opposite sides of the base plate 12 and protrudes relative to the base plate 12. The base plate 12 and the support portion 13 can be integrally formed or fixedly connected. In this embodiment, the support portion 13 is integrally formed with the base plate 12, and the support portion 13 is perpendicular to the base plate 12.

[0065] The bottom plate portion 12 is provided with the hole 11.

[0066] The winding shaft 20 is laterally connected between the support portions 13 and spaced apart from the base plate portion 12. In this embodiment, the support portions 13 are respectively provided with first pivot holes 131, and the two ends of the winding shaft 20 overlap the first pivot holes 131 to form a rotatable connection with the support portion 13. The axial degree of freedom of the winding shaft 20 is constrained.

[0067] The rotating component 31 includes a base plate portion 311 and a connecting portion 312. The connecting portion 312 is disposed on opposite sides of the base plate portion 311 and protrudes relative to the base plate portion 311. The base plate portion 311 and the connecting portion 312 are integrally formed or fixedly connected. In this embodiment, the connecting portion 312 is integrally formed with the base plate portion 311 and is perpendicular to the base plate portion 311.

[0068] The substrate portion 311 has a first through hole 3112 and a second through hole 3113, and the winding portion 3111 is formed between the first through hole 3112 and the second through hole 3113. Therefore, the winding portion 3111 is a part of the substrate portion 311.

[0069] The connecting portion 312 is sleeved on the winding shaft 20 and can rotate around the central axis of the winding shaft 20. In this embodiment, the connecting portion 312 is provided with a second pivot hole 3121, through which the connecting portion 312 is sleeved on the winding shaft 20 and located inside the support portion 13. Preferably, the outer wall of the connecting portion 312 is in contact with or close to the inner wall of the support portion 13.

[0070] In this embodiment, when the adjusting component 30 is in the first position, the winding portion 3111 faces the band hole 11, the base plate portion 311 is parallel or nearly parallel to the bottom plate portion 12, and the connecting portion 312 is located between the base plate portion 311 and the bottom plate portion 12. The winding shaft 20 is offset to one side of the winding portion 3111 along the rotation direction of the second position. When the adjusting component 30 is rotated from the first position, the connecting band 40 is pulled by the winding portion 3111 and wraps around the winding shaft 20, and the winding portion 3111 rotates from a position opposite to the band hole 11 to a position offset from the band hole 11. After the rotating member 31 rotates about 180° around the winding shaft 20, the adjusting component 30 rotates to the second position, where the base plate portion 311 is parallel or nearly parallel to the bottom plate portion 12, and the base plate portion 311 is located between the bottom plate portion 12 and the connecting portion 312.

[0071] When the adjustment component 30 is rotated to the second position, a latch 133 is provided on the base 10 to lock the adjustment component 30 in that position. The adjustment component 30 can cooperate with the latch 133 to lock in the second position.

[0072] Specifically, the adjustment assembly 30 further includes a cover 32, a locking element 33, and an elastic element 34.

[0073] The cover 32 is fixedly disposed at the second end of the rotating member 31, and a movable cavity 35 is formed between the cover 32 and the rotating member 31 for movably installing the locking member 33.

[0074] The locking member 33 is movably disposed in the movable cavity 35 and can move along the base plate portion 311. The locking member 33 can partially enter the bayonet 133 and cooperate with the bayonet 133 to lock the adjustment component 30 in the second position state.

[0075] The elastic element 34 is disposed in the movable cavity 35 and abuts against the locking element 33.

[0076] When the adjusting assembly 30 is rotated to the second position, a portion of the locking member 33 can engage with the bayonet 133 to lock the entire adjusting assembly 30 in the second position. When the locking member 33 is pushed to compress the elastic member 34, the locking member 33 can disengage from the bayonet 133, at which point the adjusting assembly 30 is no longer restricted by the bayonet 133 and can rotate.

[0077] Furthermore, the support portion 13 is provided with a latch 133 and a first guide slope 132 at its end. The first guide slope 132 is located at the end of the support portion 13 opposite to the base 10, and is inclined relative to the opening direction of the latch 133. Correspondingly, the locking member 33 is provided with a second guide slope 3311, and the locking member 33 can slide into the latch 133 by sliding along the first guide slope 132 via the second guide slope 3311. During the sliding process of the locking member 33, the elastic member 34 always has a tendency to drive the locking member 33 to abut against the base 10. Therefore, when the locking member 33 slides along the first guide slope 132, under the elastic force of the elastic member 34, the locking member 33 automatically adapts to the surface shape of the support part 13; when the locking member 33 moves to the position corresponding to the bayonet 133, under the elastic force of the elastic member 34, the locking member 33 automatically enters the bayonet 133, thereby locking the adjusting component 30 in the second position state. When the locking member 33 is pressed against the elastic force of the elastic member 34, the locking member 33 moves out of the bayonet 133, the locking member 33 is no longer restricted, and at this time, the adjusting component 30 can rotate. Specifically, under the tension of the connecting belt 40, the adjusting component 30 can automatically return to the first position state.

[0078] Furthermore, to facilitate user operation, perforations 36 are provided on the base plate 311 and the cover 32, and the perforations 36 communicate with the first through hole 3112 and the movable cavity 35. When the locking member 33 is movably installed in the movable cavity 35, the two protrusions 331 on both sides of the locking member 33 are exposed on both sides of the base plate 311 and the cover 32, and under the action of the elastic member 34, the two protrusions 331 on both sides of the locking member 33 abut against the connecting part 312 and can move in a direction away from the connecting part 312. A second guide slope 3311 is provided on the side of the protrusion 331 facing the base plate 311. The protrusion 331 can be engaged in the slot 133 to lock the adjustment assembly 30 in the second position state. One end of the locking member 33 is hidden in the movable cavity 35, while the other end is exposed in the hollow hole 36. A space is formed between the locking member 33 and the first through hole 3112, allowing a finger to enter. This facilitates the user's manipulation of the adjusting component 30 and pressing of the locking member 33. To facilitate the installation of the elastic member 34, a positioning post 332 is provided on the locking member 33. The elastic member 34 is a spring, with one end sleeved on the positioning post 332 and the other end abutting against the cover 32, thus constantly having the tendency to drive the locking member 33 towards the winding shaft 20.

[0079] Thus, the connecting belt adjustment device of this embodiment is formed. In use, simply rotating the adjustment component 30 allows for quick adjustment of the effective travel length of the connecting belt 40 within the base 10, thereby adjusting the usable length of the connecting belt 40 and quickly tightening it. When rotating from the first position to the second position, the effective travel length of the connecting belt 40 within the base 10 is increased, thereby quickly tightening the connecting belt 40 outside the base 10; when rotating from the second position to the first position, the effective travel length of the connecting belt 40 within the base 10 is decreased, thereby quickly loosening the connecting belt 40 outside the base 10. The connecting belt adjustment device of the present invention has a simple structure, small size, low cost, and convenient operation, and it has strong practicality.

[0080] Although the present invention has been disclosed through the above embodiments, the scope of the present invention is not limited thereto. Without departing from the concept of the present invention, the above components can be replaced by similar or equivalent elements known to those skilled in the art.

Claims

1. A connection belt adjusting device characterized by, It comprises: a base (10) provided with a belt hole (11) through which a connecting belt (40) can pass; a belt shaft (20) provided on the base (10); an adjusting assembly (30) movably provided on the base (10) and having at least a first position state and a second position state, the adjusting assembly (30) being provided with a belt passing portion (3111), the belt passing portion (3111) being configured such that the connecting belt (40) passing into the belt hole (11) can pass around the belt passing portion (3111) and be led out of the belt hole (11); when the adjusting assembly (30) is moved from the first position state to the second position state, the belt passing portion (3111) is forced to move from a first position to a second position, so that the connecting belt (40) passes around the belt shaft (20) and the length of the connecting belt (40) in the base (10) is increased.

2. The connection belt adjustment device of claim 1, wherein, The adjusting assembly (30) is rotatably provided on the base (10), and the adjusting assembly (30) can rotate around the central axis of the belt shaft (20).

3. The connection belt adjustment device of claim 2, wherein, The belt shaft (20) is fixedly or rotatably provided on the base (10), and the central axis of the belt shaft (20) is a fixed axis.

4. The connection belt adjustment device of claim 1, wherein, The adjusting assembly (30) is provided with a first through hole (3112) and a second through hole (3113), the first through hole (3112) and the second through hole (3113) are distributed on both sides of the belt passing portion (3111), when the connecting belt (40) passes into the base (10) from the belt hole (11), the connecting belt (40) can pass through the first through hole (3112), pass around the belt passing portion (3111), pass through the second through hole (3113), and be led out of the belt hole (11).

5. The connecting belt adjusting device according to claim 4, wherein when the connecting belt (40) passes into the base (10) from the belt hole (11), in the first position state, the connecting belt (40) does not pass around the belt shaft (20) through the first through hole (3112), passes around the belt passing portion (3111), passes through the second through hole (3113), and is led out of the belt hole (11) without passing around the belt shaft (20) after passing through the second through hole (3113); in the second position state, the connecting belt (40) passes around the belt shaft (20) through the first through hole (3112), passes around the belt passing portion (3111), passes through the second through hole (3113), and is led out of the belt hole (11) after passing around the belt shaft (20) after passing through the second through hole (3113).

6. The connection belt adjustment device of claim 4, wherein, The adjusting assembly (30) comprises a one-piece rotating member (31), a first end of the rotating member (31) is sleeved on the belt winding shaft (20) and can rotate around the central axis of the belt winding shaft (20), a second end of the rotating member (31) is exposed outside the base (10) and can be used for operation, the first perforation (3112) and the second perforation (3113) are arranged between the first end and the second end of the rotating member (31), and the belt winding part (3111) is formed between the first perforation (3112) and the second perforation (3113).

7. The connecting belt adjusting device according to claim 6, characterized in that, The base (10) comprises a bottom plate part (12) and a support part (13), the support part (13) is arranged on opposite sides of the bottom plate part (12) and protrudes relative to the bottom plate part (12), the belt hole (11) is arranged on the bottom plate part (12), and the belt winding shaft (20) is transversely connected between the support parts (13); The rotating member (31) comprises a base plate part (311) and a connecting part (312), the connecting part (312) is arranged on opposite sides of the base plate part (311) and protrudes relative to the base plate part (311), the first perforation (3112) and the second perforation (3113) are arranged on the base plate part (311), and the connecting part (312) is sleeved on the belt winding shaft (20) and located inside the support parts (13).

8. The connecting belt adjusting device according to claim 7, characterized in that, In the first position state, the belt winding part (3111) is opposite to the belt hole (11), the connecting part (312) is located between the bottom plate part (12) and the base plate part (311), and the belt winding shaft (20) is offset to one side of the belt winding part (3111) in the direction of rotation to the second position state; In the second position state, the belt winding part (3111) is staggered with the belt hole (11), and the base plate part (311) is located between the bottom plate part (12) and the connecting part (312).

9. The connecting belt adjusting device according to claim 6, characterized in that, The base (10) is provided with a bayonet (133); The adjusting assembly (30) can be locked in the second position state by cooperating with the bayonet (133).

10. The connection belt adjustment device of claim 9, wherein, The adjusting assembly (30) comprises: A cover body (32) fixedly arranged on the second end of the rotating member (31), and an active cavity (35) formed between the cover body (32) and the rotating member (31); A locking member (33) movably arranged in the active cavity (35) and partially exposed outside the cover body (32) and the rotating member (31), at least a part of the locking member (33) can enter the bayonet (133) and cooperate with the bayonet (133) to lock the adjusting assembly (30) in the second position state; An elastic member (34) arranged in the active cavity (35) and abutting against the locking member (33).

11. The connection belt adjustment device of claim 10, wherein, The first guide slope (132) is inclined relative to the opening direction of the bayonet (133), the locking member (33) is provided with a second guide slope (3311), the locking member (33) can slide along the first guide slope (132) to the bayonet (133) through the second guide slope (3311), and the elastic member (34) constantly has a tendency to drive the locking member (33) to abut against the base (10) during the sliding of the locking member (33).

12. The connection belt adjustment device of claim 2, wherein, The adjusting assembly (30) can rotate 135°-180° from a first position state to a second position state.

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