Strap fasteners

Abstract

A belt fastener comprising a housing and a buckle assembly, characterized in that the buckle assembly comprises a toothed belt and a snap fastener, one end of the toothed belt being connected to one end of the housing, the other end of the housing being provided with a cavity for the free end of the toothed belt to penetrate, the toothed belt being provided with a plurality of sawtooth structures, the snap fastener being rotationally connected to the inner wall of the cavity, the underside of the snap fastener being provided with an inclined surface structure, the inclined surface structure being urged to swing back and forth by the sawtooth structure when the free end of the toothed belt is moved forward along the cavity, the inclined surface structure being canceled and held by the sawtooth structure when the forward movement is switched to a reverse movement by the free end of the toothed belt.wherein the timing belt is separated from the inclined surface structure when the snap fastener is rotated to a preset position so that the free end of the timing belt is moved backward along the cavity.,

Description

Technical FieldThe present invention relates to the technical field of goods transport, in particular to a belt fastener.Prior ArtWith the rapid development of road traffic, more and more private car owners are deciding to drive private cars for long and short travel. Also, demand for cars to carry various items is increasing, which has become a general phenomenon. However, people use cars to carry many kinds of articles, including many articles having complex structures and easy shaking, such as bicycles. How to securely and firmly attach these articles to the rear frame of the car has become a great problem faced by people. At present, the common fastening method is to bind objects with binding ropes, but it is difficult to ensure that the objects are stably fastened to the rear frame of the car only by the tension force of the binding ropes. Especially when driving the vehicle, factors such as road vibrations and sharp turns may easily result in loosening of the binding ropes, causing objects to fluctuate or even fall down, which is a great safety risk.Content of the Present Utility ModelIn view of this, the present invention provides a belt fastener to solve the problem that it is difficult to effectively secure the stability of the car-carried articles by the existing binding rope fastening method.The present invention provides a belt fastener having a housing and a buckle assembly, the buckle assembly comprising a toothed belt and a snap fastener, one end of the toothed belt being connected to one end of the housing, the other end of the housing being provided with a cavity for penetrating the free end of the toothed belt, the toothed belt being provided with a plurality of saw-tooth structures, the snap fastener being rotatably connected to the inner wall of the cavity, the bottom of the snap fastener being provided with an inclined surface structure, the inclined surface structure being pushed by the saw-tooth structure for rocking when the free end of the toothed belt is advanced along the cavity, the inclined surface structure being canceled and retained by the saw-tooth structure, when the forward movement is switched to a backward movement by the free end of the toothed belt, the toothed belt being separated from the inclined surface structure when the snap lock is rotated to a preset position, so that the free end of the toothed belt is moved backward along the cavity.In one possible implementation, it is provided that the underside of the snap fastener is provided with a first strut, wherein the strap fastener further comprises an adjustment arrangement, wherein the adjustment arrangement comprises a pin and a first torsion spring, wherein the pin is rotatably connected to the inner wall of the cavity, wherein the underside of the pin is provided with a second strut and a wedge-shaped structure, wherein the first strut and the second strut are arranged on the same side, wherein the first torsion spring is provided with a first bending portion and a second bending portion, wherein the first bending portion is sheathed outside the first strut, wherein the second bending portion is sheathed outside the second strut, wherein a torsion arm of the first torsion spring is connected to the pin, wherein a further torsion arm of the first torsion spring is connected to the snap fastener, wherein the wedge-shaped structure is engaged with the saw tooth structure to press the forward movement of the toothed belt when the wedge-shaped structure is swung forward, at the same time the pin is driven by the first torsion spring to be raised with the inclined surface structure and separated from the saw tooth structure, the wedge-shaped structure being separated from the toothed belt when the wedge-shaped structure is switched from a forward vibration to a reverse vibration, at the same time the pin is driven by the first torsion spring to be lowered with the inclined surface structure and restored to a state enabling the free end of the toothed belt to move forward.In one possible implementation, it is provided that the strap fastener further comprises a lock arrangement, wherein the lock arrangement comprises a lock body, a connecting arm and a second torsion spring, wherein one side of the lock body is connected to the housing, wherein the other side of the lock body is connected to one end of the connecting arm, wherein a rotation axis and a ramp structure are arranged at the other end of the connecting arm, wherein a torsion arm of the second torsion spring is connected to the connecting arm, wherein a further torsion arm of the second torsion spring is connected to the inner wall of the cavity, wherein the bending body of the second torsion spring is sheathed outside the rotation axis, wherein the lock body is driven by the connecting arm in order to be rotated forwards with the ramp structure about the rotation axis when the lock body is rotated into the unlocking position, such that the ramp structure is separated from the ramp structure, the ramp structure being supported by the second torsion spring to maintain the separated state, the lock body being driven by the link arm to be rotated backward with the ramp structure about the rotation axis when the lock body is rotated to the locking position such that the ramp structure is locked to the ramp structure, the ramp structure being supported by the second torsion spring to maintain the locked state.In one possible implementation, the strap fastener is further provided to include a grip clamp assembly, the grip clamp assembly including an upper clamp, a lower clamp, a connecting rod, a third torsion spring, and a mounting member, the connecting rod passing through an end of the upper clamp and an end of the lower clamp, respectively, the upper clamp and the lower clamp being rotatable about the connecting rod, respectively, a torsion arm of the third torsion spring being connected to the upper clamp, another torsion arm of the third torsion spring being connected to the lower clamp, the flexure body of the third torsion spring being sheathed outside the connecting rod, one end of the mounting member being movably connected to the housing, the other end of the lower clamp being forced by the mounting member to rotate about the connecting rod to a position, in which it fits with the other end of the upper clamp when the mounting member is moved forwardly to the position in which it abuts the lower clamp so that the third torsion spring is in a tensioned state, the other end of the lower clamp being driven by the third torsion spring to rotate about the connecting rod to a position in which it is separated from the other end of the upper clamp when the mounting member is moved rearwardly to the position in which it is separated from the lower clamp so that the third torsion spring is in a relaxed state.In one possible implementation, it is provided that the fastening part comprises a movable part and a connecting column, wherein the movable part is formed hollow, wherein the movable part comprises a stop block, a cylinder and a rotational seat, wherein one end of the cylinder is connected to the stop block, wherein the other end of the cylinder is connected to the rotational seat, wherein the stop block is sheathed on the outer surface of one end of the connecting column, wherein the rotational seat is sheathed on the outer surface of the other end of the connecting column, wherein the outer surface of the connecting column is provided with an external thread, wherein the inner wall of the rotational seat is provided with an internal thread for matching with the external thread, wherein the stop block is driven by the rotational seat in order to separate or engage with the lower clamp, when the rotary seat is moved up and down by a relative rotational movement between the internal thread and the external thread, so that the other end of the lower clamp and the other end of the upper clamp are separated from or matched to each other.The advantageous effect of the present invention over the prior art is a belt fastener having a housing and a buckle assembly, the buckle assembly comprising a toothed belt and a snap fastener, one end of the toothed belt being connected to one end of the housing, the other end of the housing being provided with a cavity for penetrating the free end of the toothed belt, the toothed belt being provided with a plurality of saw tooth structures, the snap fastener being rotatably connected to the inner wall of the cavity, the underside of the snap fastener being provided with an inclined surface structure, the inclined surface structure being forced by the saw tooth structure to oscillate when the free end of the toothed belt is advanced along the cavity, the inclined surface structure being canceled and retained by the saw tooth structure, when the forward movement is switched to a backward movement by the free end of the toothed belt, the toothed belt being separated from the inclined surface structure when the snap lock is rotated to a preset position, so that the free end of the toothed belt is moved backward along the cavity. It can be seen that in the belt fastener, the saw tooth structure on the toothed belt interacts with the inclined surface structure at the lower end of the snap closure, so that one-sided locking and a comfortable release of the toothed belt can be achieved. When binding articles with toothed belts, the toothed belt can be moved smoothly forwards to adapt to articles of different sizes. When the toothed belt attempts to disengage rearwardly, the toothed belt is automatically held by the snap lock to prevent the toothed belt from disengaging, thereby ensuring the stability and reliability of the binding force of the articles. When removing the object, the snap-fit can also be rotated into a preset position. The toothed belt is separated from the inclined surface structure, so that an unhindered removal from the cavity of the housing is possible. Such a design not only significantly improves the stability and safety of the car-worn items, but also significantly improves the ease of use and the user experience.Brief Description of the DrawingsFIG. 1 is a schematic diagram showing the structure of a belt fastener according to an embodiment of the present invention; FIG. 2 is a schematic diagram showing the structure of a belt fastener after removing a housing according to an embodiment of the present invention; FIG. 3 is a schematic illustration of the first structure of a buckle assembly, an adjuster assembly, and a lock assembly according to an embodiment of the present invention; FIG. 4 is a partially enlarged view of A of FIG. 3 ; FIG. 5 is a schematic illustration of the second structure of a buckle assembly, an adjuster assembly, and a lock assembly according to an embodiment of the present invention; FIG. 6 is a partially enlarged view of B of FIG. 5 ; FIG. 7 is a schematic diagram showing the structure of a grip clamp assembly according to an embodiment of the present invention; FIG. 8 is a disassembled view of the structure of a grip clamp assembly according to an embodiment of the present invention.Reference Number:10. Housing; 21st toothed belt; 211. Sawtooth structure; 212. Buffer block; 22nd snap fit; 221. Inclined surface structure; 222. First strut; 31st pin; 311. Second strut; 312. Wedge-shaped structure; 32. first torsion spring; 41. lock body; 42. connecting arm; 421. Axis of rotation; 422. Inclined surface structure; 43. Second torsion spring; 51. Upper clamp; 52. Lower clamp; 53. Connecting rod; 54. Third torsion spring; 551. Stopper block; 552. Cylinder; 553. Rotational seat; 56. connecting column; 561. External threads.DETAILED EMBODIMENTSHereinafter, the solutions in the embodiments of the present invention will be clearly and fully described in conjunction with the drawings in the embodiments of the present invention. Of course, the described embodiments are only a part of the embodiments in the present invention, not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in the present invention without any creative work fall within the scope of the present invention. A belt fastener according to the present invention, comprising a housing 10 and a buckle assembly, the buckle assembly comprising a toothed belt 21 and a snap lock 22, one end of the toothed belt 21 being connected to one end of the housing 10, the other end of the housing 10 being provided with a cavity for penetrating the free end of the toothed belt 21, the toothed belt 21 being provided with a plurality of saw tooth structures 211, the snap lock 22 being rotatably connected to the inner wall of the cavity, the bottom of the snap lock 22 being provided with an inclined surface structure 221, the inclined surface structure 221 being pushed by the saw tooth structure 211 for rocking when the free end of the toothed belt 21 is advanced along the cavity, the inclined surface structure 221 being canceled and retained by the saw tooth structure 211, when the forward movement is switched to a backward movement by the free end of the toothed belt 21, the toothed belt 21 being separated from the inclined surface structure 221 when the snap lock 22 is rotated to a preset position so that the free end of the toothed belt 21 is moved backward along the cavity, referring to FIGS. 1 to 2. in particular, the toothed belt 21 is a belt of the belt fastener for binding articles. By the cooperation of the toothed belt 21 with the snap closure 22, a secure binding of the objects can be achieved. When the toothed belt 21 wraps around the object and is biased forward to adjust the binding strength, the inclined surface structure 221 at the lower end of the snap fastener 22 is driven to swing periodically by the saw tooth structure 211 on the toothed belt 21. The swinging does not impair the advancement of the toothed belt 21, so that the toothed belt 21 can be flexibly adapted to objects of different sizes for adjusting the binding position. When the free end of the toothed belt 21 attempts to move backward, this means that the toothed belt 21 has a tendency to be relaxed. The saw tooth structure 211 is immediately pushed on, thereby clamping the inclined surface structure 221 to form a secure lock, so that the toothed belt 21 is prevented from being loosened and the bonding strength is ensured.When the toothed belt 21 needs to be opened to take out the article, the snap lock 22 is rotated to a preset position, so that the toothed belt 21 is separated from the inclined surface structure 221. The free end of the toothed belt 21 can be smoothly moved back to pull out of the cavity, so that detachment of the toothed belt 21 and ease of taking out of articles are achieved. By this mechanism, various articles can be stably and firmly bound by the belt fastener, which is particularly suitable for occasions which must be reliably fastened, such as the rear frame of the car.In some embodiments of the present application, it is provided that the bottom of the snap fastener 22 is provided with a first strut 222, the belt fastener further comprising an adjustment arrangement, the adjustment arrangement comprising a pin 31 and a first torsion spring 32, the pin 31 being rotatably connected to the inner wall of the cavity, the bottom of the pin 31 being provided with a second strut 311 and a wedge-shaped structure 312, the first strut 222 and the second strut 311 being arranged on the same side, the first torsion spring 32 being provided with a first bending portion and a second bending portion, the first bending portion being sheathed outside the first strut 222, the second bending portion being sheathed outside the second strut 311, a torsion arm of the first torsion spring 32 being connected to the pin 31, wherein another torsion arm of the first torsion spring 32 is connected to the snap lock 22, the wedge-shaped structure 312 is snapped into the saw-toothed structure 211 to press the forward movement of the toothed belt 21 when the wedge-shaped structure 312 is swung forward, at the same time the pin 31 is driven by the first torsion spring 32 to be raised with the inclined surface structure 221 and separated from the saw-toothed structure 211, the wedge-shaped structure 312 is separated from the toothed belt 21 when the wedge-shaped structure 312 is switched from a forward vibration to a reverse vibration, at the same time the pin 31 is driven by the first torsion spring 32 to be lowered with the inclined surface structure 221 and restored to a state allowing a forward movement of the free end of the toothed belt 21.Specifically, the housing 10 is provided with a through slot, the snap 22 and the pin 31 are respectively located in the through slot, the upper end of the snap 22 and the upper end of the pin 31 are respectively protruded through a through slot from the housing 10 to facilitate the user to directly pull the pin 31, thereby improving convenience and convenience of operation, referring to FIGS. 3 to 6, At the same time, sufficient moving space is provided through the through slots for the snap 22 and the pin 31 to flexibly pivot or rotate without being obstructed by the housing 10, thereby ensuring smooth mechanical movement. When the user operates the pin 31 to pivot the wedge-shaped structure 312 forward, the wedge-shaped structure 312 is snapped into the saw tooth structure 211 of the toothed belt 21 to push the toothed belt 21 forward, thereby achieving further attachment of the toothed belt 21. At the same time, the inclined surface structure 221 at the lower end of the snap lock 22 is driven by a pin 31 through the elastic force of the first torsion spring 32 to be separated from the saw tooth structure 211, so that the hindrance of the advancement of the toothed belt 21 is avoided and smooth adjustment is ensured. Conversely, when the user loosens the pin 31, the wedge-shaped structure 312 is switched from a forward vibration to a rearward vibration, so that the wedge-shaped structure 312 is separated from the toothed belt 21. The pin 31 is driven by the first torsion spring 32 to be lowered with the inclined surface structure 221 and restored to a state enabling smooth forward movement of the free end of the toothed belt 21, thereby ensuring that the bonding strength for the toothed belt 21 can still be freely adjusted. That is, for this adjusting arrangement, the cooperation of the wedge-shaped structure 312 of the pin 31, the saw tooth structure 211 of the toothed belt 21, the inclined surface structure 221 of the snap lock 22 and the first torsion spring 32 realizes the fine adjustment function that the toothed belt 21 is clamped for one step once the pin 31 is rotated in. This construction makes it easier for the user to tension the toothed belt 21 stepwise as required, which makes the safety more robust, which is particularly suitable for application scenarios with high requirements for the fastening strength.In some embodiments of the present application, it is contemplated that the strap fastener further comprises a lock assembly, the lock assembly comprising a lock body 41, a link arm 42 and a second torsion spring 43, one side of the lock body 41 being connected to the housing 10, the other side of the lock body 41 being connected to one end of the link arm 42, at the other end of the link arm 42 a pivot axis 421 and a ramp structure 422 being arranged, one torsion arm of the second torsion spring 43 being connected to the link arm 42, another torsion arm of the second torsion spring 43 being connected to the inner wall of the cavity, the flexure body of the second torsion spring 43 being sheathed outside the pivot axis 421, the lock body 41 being driven by the link arm 42 to be rotated forwardly with the ramp structure 422 about the pivot axis 421, when the lock body 41 is rotated to the unlocking position so that the ramp structure 422 is separated from the saw tooth structure 211, the ramp structure 422 being supported by the second torsion spring 43 for maintaining the separated state, the lock body 41 being driven by the link arm 42 to be rotated backward with the ramp structure 422 about the rotation axis 421 when the lock body 41 is rotated to the locking position so that the ramp structure 422 is locked to the saw tooth structure 211, the ramp structure 422 being supported by the second torsion spring 43 for maintaining the locked state. Specifically, one end of the lock body 41 is fixedly connected to the housing 10, and the other end is driven by the link arm 42 to be rotated about the rotation axis 421 with a ramp structure 422. The second torsion spring 43 is connected to the housing 10 by the link arm 42 to provide resilient support to ensure that the ramp structure 422 remains stable in various conditions. When the lock body 41 is turned to the unlocking position by a key of the user, the ramp structure 422 is separated from the saw tooth structure 211. The lock arrangement does not have a locking function for the toothed belt 21, thereby facilitating the adjustment of the tension of the toothed belt 21. When the lock body 41 is turned to the locking position by a key from the user, the ramp structure 422 is snapped into the saw tooth structure 211 to effect mechanical locking. This ensures further safety, effectively preventing the toothed belt 21 from being loosened by vibrations or external forces. The stability, reliability and safety of the toothed belt 21 are further improved based on the original adjustment mechanism by artificial control by the lock assembly, thereby achieving a more stable locking action.In some embodiments of the present application, it is contemplated that the belt fastener further comprises a grip clamp assembly, the grip clamp assembly comprising an upper clamp 51, a lower clamp 52, a connecting rod 53, a third torsion spring 54, and a fastening member, the connecting rod 53 passing through an end of the upper clamp 51 and an end of the lower clamp 52, respectively, the upper clamp 51 and the lower clamp 52 being rotatable about the connecting rod 53, respectively, a torsion arm of the third torsion spring 54 being connected to the upper clamp 51, another torsion arm of the third torsion spring 54 being connected to the lower clamp 52, the flexure body of the third torsion spring 54 being sheathed outside the connecting rod 53, one end of the fastening member being movably connected to the housing 10, wherein the other end of the lower clamp 52 is pushed by the fastening member to rotate about the connecting rod 53 to a position fitting with the other end of the upper clamp 51 when the fastening member is moved forward to the position abutting against the lower clamp 52 so that the third torsion spring 54 is in a tensioned state, the other end of the lower clamp 52 is driven by the third torsion spring 54 to rotate about the connecting rod 53 to a position separated from the other end of the upper clamp 51 when the fastening member is moved backward to the position separated from the lower clamp 52 so that the third torsion spring 54 is in a relaxed state.Specifically, the grip clamp assembly serves to stably fix the belt fastener to the rear frame or other brackets of the car with reference to FIGS. 7 to 8, and when not in use, an elastic force is provided by the third torsion spring 54 so that the upper clamp 51 and the lower clamp 52 remain in an opened state, facilitating rapid installation as needed.Once the gripping clamp assembly is installed in the proper position on the rear frame of the car, the attachment member can be moved forwardly to a position in which it abuts the lower clamp 52. At this time, the lower clamp 52 is pressed by the fastening member to be rotated about the connecting rod 53 and finally engaged with the upper clamp 51 to complete the clamping operation, so that a firm connection of the belt fastener to the rear frame of the car is ensured. When the attachment member moves rearwardly to a position separated from the lower clamp 52, the third torsion spring 54 is again driven to open with the upper clamp 51 and the lower clamp 52, facilitating disassembly or adjustment of the grasping clamp assembly. In addition, an oblique closing line is formed when the other end of the upper clamp 51 is abutted with the other end of the lower clamp 52. Compared to the straight closing line, the oblique closing line has a certain mechanical self-locking effect, which can be effectively prevented from being released by vibrations or external forces. The locking reliability of the grip clamp assembly is increased, thus ensuring the stability of the strap fastener during use.In some embodiments of the present application, it is provided that the fixing part comprises a movable part and a connecting column 56, the movable part being formed hollow, the movable part comprising a stopper block 551, a cylinder 552, and a rotating seat 553, one end of the cylinder 552 being connected to the stopper block 551, the other end of the cylinder 552 being connected to the rotating seat 553, the stopper block 551 being sheathed on the outer surface of one end of the connecting column 56, the rotating seat 553 being sheathed on the outer surface of the other end of the connecting column 56, the outer surface of the connecting column 56 being provided with an external thread 561, the inner wall of the rotating seat 553 being provided with an internal thread for matching with the external thread 561, wherein the stopper block 551 is driven by the rotating seat 553 to separate or abut against the lower clamp 52 when the rotating seat 553 is moved up and down by a relative rotational movement between the internal thread and the external thread 561, so that the other end of the lower clamp 52 and the other end of the upper clamp 51 are separated or fitted to each other.Specifically, by the relative rotational movement of the internal thread of the rotating seat 553 along the external thread 561 of the connecting column 56, up and down movement of the rotating seat 553 can be achieved, whereby the stopper block 551 is driven to separate or come into abutment with the lower clamp 52, so that the other end of the lower clamp 52 and the other end of the upper clamp 51 are separated or fitted to each other to complete the clamping or opening operation. Moreover, the lower surface of the lower clamp 52 is provided with a recess for fitting to the stopper block 551. When the lower clamp 52 is pressed by the stopper block 551 to clamp the upper clamp 51, the stopper block 551 can protrude accurately into the recess and stably abut on the lower clamp 52 to prevent lateral slipping, thereby improving the strength and reliability of clamping. The stopper block 551 has a smooth spherical design that enables smooth extension into the recess, thereby reducing jamming and wear and improving the operation non-friction and durability. It should be noted that the toothed belt 21 is also covered with a U-shaped buffer block 212 to achieve a close fit to the contour of the bicycle and to improve the uniformity of force. This prevents local damage to tires and rims, thereby ensuring safety and stability when the bicycle is bound to the rear frame of the car.

Claims

A belt fastener comprising a housing and a buckle assembly, characterized in that the buckle assembly comprises a toothed belt and a snap fastener, one end of the toothed belt being connected to one end of the housing, the other end of the housing being provided with a cavity for penetrating the free end of the toothed belt, the toothed belt being provided with a plurality of saw-tooth structures, the snap fastener being rotatably connected to the inner wall of the cavity, the bottom side of the snap fastener being provided with an inclined surface structure, the inclined surface structure being forced by the saw-tooth structure to oscillate when the free end of the toothed belt is advanced along the cavity, the inclined surface structure being canceled and retained by the saw-tooth structure, when the forward movement is switched to a backward movement by the free end of the toothed belt, the toothed belt being separated from the inclined surface structure when the snap lock is rotated to a preset position, so that the free end of the toothed belt is moved backward along the cavity.The belt fastener according to claim 1, characterized in that the bottom side of the snap fastener is provided with a first strut, the belt fastener further comprising an adjustment arrangement, the adjustment arrangement comprising a pin and a first torsion spring, the pin being rotatably connected to the inner wall of the cavity, the bottom side of the pin being provided with a second strut and a wedge-shaped structure, the first strut and the second strut being arranged on the same side, the first torsion spring being provided with a first bending portion and a second bending portion, the first bending portion being sheathed outside the first strut, the second bending portion being sheathed outside the second strut, a torsion arm of the first torsion spring being connected to the pin, another torsion arm of the first torsion spring being connected to the snap fastener, wherein the wedge-shaped structure is engaged with the saw tooth structure to press the forward movement of the toothed belt when the wedge-shaped structure is swung forward, at the same time the pin is driven by the first torsion spring to be raised with the inclined surface structure and separated from the saw tooth structure, the wedge-shaped structure being separated from the toothed belt when the wedge-shaped structure is switched from a forward vibration to a reverse vibration, at the same time the pin is driven by the first torsion spring to be lowered with the inclined surface structure and restored to a state enabling the free end of the toothed belt to move forward.The strap fastener of claim 1, characterized in that the strap fastener further comprises a lock assembly, the lock assembly comprising a lock body, a connecting arm, and a second torsion spring, one side of the lock body being connected to the housing, the other side of the lock body being connected to one end of the connecting arm, at the other end of the connecting arm a pivot axis and a ramp structure being arranged, one torsion arm of the second torsion spring being connected to the connecting arm, another torsion arm of the second torsion spring being connected to the inner wall of the cavity, the bending body of the second torsion spring being sheathed outside the pivot axis, the lock body being driven by the connecting arm to be rotated forwardly with the ramp structure about the pivot axis when the lock body is rotated to the unlocked position, such that the ramp structure is separated from the ramp structure, the ramp structure being supported by the second torsion spring to maintain the separated state, the lock body being driven by the link arm to be rotated backward with the ramp structure about the rotation axis when the lock body is rotated to the locking position such that the ramp structure is locked to the ramp structure, the ramp structure being supported by the second torsion spring to maintain the locked state.The belt fastener of claim 1, characterized in that the belt fastener further comprises a grip clamp assembly, the grip clamp assembly comprising an upper clamp, a lower clamp, a connecting rod, a third torsion spring, and a fastening member, the connecting rod passing through an end of the upper clamp and an end of the lower clamp, respectively, the upper clamp and the lower clamp being rotatable about the connecting rod, respectively, a torsion arm of the third torsion spring being connected to the upper clamp, another torsion arm of the third torsion spring being connected to the lower clamp, the bending body of the third torsion spring being sheathed outside the connecting rod, one end of the fastening member being movably connected to the housing, the other end of the lower clamp being pushed by the fastening member, to rotate about the connecting rod to a position fitting with the other end of the upper clamp when the mounting member is moved forward to the position abutting against the lower clamp so that the third torsion spring is in a tensioned state, the other end of the lower clamp being driven by the third torsion spring to rotate about the connecting rod to a position separated from the other end of the upper clamp when the mounting member is moved backward to the position separated from the lower clamp so that the third torsion spring is in a relaxed state.The belt fastener according to claim 4, characterized in that the fastening part comprises a movable part and a connecting column, the movable part being formed hollow, the movable part comprising a stopper block, a cylinder, and a rotating seat, one end of the cylinder being connected to the stopper block, the other end of the cylinder being connected to the rotating seat, the stopper block being sheathed on the outer surface of one end of the connecting column, the rotating seat being sheathed on the outer surface of the other end of the connecting column, the outer surface of the connecting column being provided with an external thread, the inner wall of the rotating seat being provided with an internal thread for matching with the external thread, the stopper block being driven by the rotating seat to separate or abut with the lower clamp, when the rotary seat is moved up and down by a relative rotational movement between the internal thread and the external thread, so that the other end of the lower clamp and the other end of the upper clamp are separated from or matched to each other.

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