A new type of lacing device and its non-return mechanism

Abstract

The application provides a novel lacing device and a reverse stopping mechanism thereof, the lacing device adopts a novel swing arm-baffle-groove mechanism as the reverse stopping mechanism, the reverse stopping mechanism has double self-locking functions and reverse offset limiting functions, three effects in one, so that the lacing device using the novel reverse stopping mechanism not only has a good hand feeling when the lacing device is tightened, but also can effectively avoid accidental loosening of the lacing device, and has excellent use reliability and durability.

Description

Technical Field

[0001] This invention relates to the field of lacing systems, and more specifically to a novel lacing device and its anti-reverse mechanism. Background Technology

[0002] Most fastening devices on the market currently use a housing tooth-pawl structure to achieve unidirectional rotation of the fastening mechanism. This structure utilizes the flexural deformation of an elastic arm to achieve unidirectional rotation and uses a mechanism to prevent material buckling to prevent reverse rotation. Once the pawl arm buckles, the structure fails. Other anti-reverse mechanisms either have the problem of being too stiff and requiring too much effort to use, or have poor anti-reverse capability.

[0003] Therefore, there is an urgent need for a fastening device with a novel anti-reverse mechanism that not only has a good feel but also excellent anti-reverse reliability. Summary of the Invention

[0004] This invention provides a novel strapping device and its anti-reverse mechanism, which uses a novel swing arm-stop mechanism as the anti-reverse mechanism. The swing arm head and the wedge-shaped head of the stop form a reverse self-locking, which can greatly enhance the reliability of the strapping device in preventing reverse rotation.

[0005] A novel lacing device includes: a cap, a reel, and a housing. The cap is rotatably mounted on the housing, and the reel is supported by the housing and can rotate relative to the housing.

[0006] The screw cap is provided with one or more grooves;

[0007] The reel is configured to wind up the tether when rotating in the tension direction and release the tether when rotating in the unwind direction;

[0008] The housing is provided with a swing arm elastic assembly, which includes an elastic member and one or more swing arms arranged circumferentially. The swing arms are connected to the housing via the elastic member. Each swing arm includes at least a swing arm head and a swing arm beam, which extends radially outward along the circumference of the one or more swing arms. Each swing arm includes opposing first and second sides. The swing arm head is configured to engage a groove of the screw cap when the swing arm is in its original position. The swing arm beam and / or the swing arm head is configured to be offset from its original position toward either the first or second side of the swing arm.

[0009] The housing is further provided with one or more stops and the stops are located on the first side of the swing arm; the stops include wedge-shaped heads and the wedge-shaped heads of the stops are correspondingly provided with the heads of the swing arms;

[0010] When the cap is subjected to an external force in the tensioning direction, the stop and the elastic member allow the swing arm to move relative to the groove of the cap until the swing arm head disengages from the groove of the cap, so as to allow the cap to rotate in the tensioning direction.

[0011] When the cap is subjected to an external force in the release direction, the release force causes the groove sidewall of the cap to bias the swing arm head, causing it to deflect, such that at least a portion of the swing arm head abuts against the wedge-shaped head of the stop block. The swing arm head remains engaged with the groove of the cap to prevent the cap from rotating in the release direction.

[0012] The releasing force mentioned in this application refers to an external force along the releasing direction.

[0013] The offset includes deflection, swaying, or bending, and the offset movement causes the swing arm head to no longer be in its original position but to tilt or bend to a certain extent.

[0014] In the above technical solution, the offset of the swing arm to the first side is consistent with the direction of force applied to the cap in the loosening direction. The first and second sides of the swing arm as a whole are completely consistent with the orientation of the first and second sides of the swing arm head or swing arm beam; the teeth of the swing arm head also include a first and second side, and the orientation of the first and second sides of the teeth is consistent with the orientation of the first and second sides of the swing arm or swing arm beam. For example, taking the central axis of the swing arm beam as a reference, the left side of the central axis is the first side, and the right side of the central axis is the second side; similarly, taking the central axis of the swing arm teeth as a reference, the left side of the central axis is also the first side, and the right side of the central axis is the second side. In other words, if the position when the swing arm teeth engage with the cap groove is called the original position, we call the direction of screwing the cap in the loosening direction the swing arm teeth, swing arm neck, swing arm beam, and the first side of the swing arm, and the direction of screwing the cap in the tightening direction the second side of the swing arm teeth, swing arm neck, swing arm beam, and swing arm. The first and second sides are located on both sides of the original position.

[0015] "The swing arm beam and / or swing arm head are configured to be offset from their original positions toward a first side of the swing arm" refers to at least one of three technical solutions: both the swing arm beam and the swing arm head are offset from the original position of the swing arm toward its first side; the swing arm beam is offset from the original position of the swing arm toward its first side; and the swing arm head is offset from the original position of the swing arm toward its first side. Similarly, "The swing arm beam and / or swing arm head are offset from their original positions toward a second side of the swing arm" includes at least one of three technical solutions: both the swing arm beam and the swing arm head are offset from the original position of the swing arm toward its second side; the swing arm beam is offset from the original position of the swing arm toward its second side; and the swing arm head is offset from the original position of the swing arm toward its second side.

[0016] Preferably, the stop block is provided in a one-to-one correspondence with the swing arm.

[0017] Preferably, the stop block is separately disposed from the swing arm.

[0018] Preferably, the stop block further includes a base, and the base of the stop block is correspondingly disposed with respect to the swing arm beam.

[0019] When the cap is not subjected to external force, when the swing arm head engages with the cap groove, the swing arm is in its original position and is in a naturally extended state (i.e., both the swing arm beam and the swing arm head are in their original positions and are in a naturally extended state); when the cap is subjected to external force, during the process of the swing arm beam and / or the swing arm head shifting from its original position to the first side or from its original position to the second side, the swing arm beam and / or the swing arm head is in a state of deviating from its original position.

[0020] Preferably, the swing arm is configured to have a gap with the stop when it is in its original position.

[0021] The swing arm is configured to have a gap with the stop when in its original position. This gap ensures that when the cap is subjected to an external force in the tension direction, the stop does not impede the movement of the swing arm, allowing the swing arm head to disengage from the cap recess. The gap between the wedge-shaped head of the stop and the swing arm head is crucial for the disengagement of the swing arm head from the recess.

[0022] When the cap is subjected to an external force along the tensioning direction, the tensioning force causes the groove sidewall to bias the swing arm head. The biasing force is transmitted to the elastic member through the swing arm. The biasing force applied by the groove sidewall includes radial and circumferential components. Under the action of the radial component, the elastic member undergoes elastic deformation, thereby driving the swing arm to move radially inward. The circumferential component mainly acts on the swing arm head, and its direction is the same as the circumferential component of the tensioning force. In addition, the stop does not hinder the swing arm from shifting in the tensioning direction, so this circumferential component causes the swing arm to shift circumferentially (including bending deformation, swinging, or deflection). Therefore, under the action of the tensioning force, the displacement of the swing arm includes a radially inward displacement component and a circumferential displacement component along the tensioning direction. The phrase "groove sidewall biases the swing arm head (or swing arm)" means that the pressure point on the swing arm head (or swing arm) is deviated from the axis of the swing arm head (or swing arm), causing the swing arm head (or swing arm) to be in a state of being both compressed and bent.

[0023] The releasing force causes the sidewall of the groove to bias the swing arm head, causing it to shift toward the first side, such that at least a portion of the swing arm head abuts against the wedge-shaped head of the stop.

[0024] Preferably, when at least a portion of the swing arm head abuts against the wedge-shaped head of the stop, the wedge-shaped head of the stop applies a compressive force to the swing arm head, the compressive force including a radially outward component, the radially outward component ensuring that the swing arm head remains in contact with the screw cap groove. The compressive force applied to the swing arm head by the wedge-shaped head of the stop is also a biasing force.

[0025] Preferably, the swing arm head includes teeth and a neck, and when the swing arm is in its original position, the teeth of the swing arm head engage with the screw cap groove.

[0026] Preferably, when the cap is subjected to an external force in the release direction, at least a portion of the neck of the swing arm head abuts against the wedge-shaped head of the stop.

[0027] Preferably, the contact between at least a portion of the neck of the swing arm head and the wedge-shaped head of the stop includes the contact between a first side of the neck of the swing arm head and the wedge-shaped head of the stop, or the contact between a portion of the first side of the neck of the swing arm head and the wedge-shaped head of the stop.

[0028] The neck of the swing arm head can also be referred to as "the neck" or "the swing arm neck"; the teeth of the swing arm head can be referred to as "the teeth" or "the swing arm teeth".

[0029] The "first side of the neck" refers to the sidewall surface located on the first side of the neck. When the cap is subjected to an external force in the loosening direction, the loosening force causes the sidewall of the groove to bias the swing arm head. The biasing force is basically in the same direction as the loosening force, forming a bending force acting on the swing arm head. This biasing force causes the swing arm head to deviate in the direction of the loosening force, resulting in at least a portion of the neck side of the swing arm head abutting against the wedge-shaped head of the stop. Subsequently, the wedge-shaped head of the stop applies a compressive force to the neck side of the swing arm. This compressive force includes a radially outward component and a circumferential component. The circumferential component is opposite to the biasing force acting on the swing arm head. Therefore, the circumferential component can counteract at least a portion of the biasing force acting on the swing arm head. At the same time, the radially outward component makes the teeth of the swing arm head fit more tightly against the cap groove, so that the teeth of the swing arm head can always maintain engagement with the cap groove to prevent the cap from rotating in the loosening direction.

[0030] Preferably, the slope of the wedge-shaped head of the stop is located on the second side of the wedge-shaped head.

[0031] Preferably, the slope of the wedge-shaped head of the stop is adjacent to the first side of the neck of the swing arm head, and the crest of the slope is offset relative to the foot of the slope towards the first side of the wedge-shaped head. The foot of the wedge-shaped head is adjacent to the base of the stop.

[0032] Preferably, the slope of the wedge-shaped head is configured such that when the cap is subjected to an external force in the release direction, the swing arm head shifts to its first side, such that at least a portion of the first side of the neck abuts against the slope of the wedge-shaped head.

[0033] Preferably, the neck of the swing arm head is configured as a fan-shaped ring or trapezoidal shape.

[0034] Preferably, the neck of the swing arm head is configured with an inclined plane on one side adjacent to the slope of the wedge-shaped head, and an arc-shaped concave surface on the other side.

[0035] Preferably, the neck of the swing arm head and the overall swing arm beam are configured to resemble an axe shape.

[0036] The structural design of the swing arm neck is twofold: first, to meet the functional requirements of the fit between the swing arm and the slope of the wedge-shaped head of the stop block; and second, to achieve a smooth transition between the teeth and the swing arm beam, thereby ensuring that each component can fully perform its function while forming an organically coordinated whole.

[0037] Preferably, the swing arm head includes one or more teeth.

[0038] More preferably, each swing arm head includes two teeth. A swing arm with two teeth is more effective at preventing reverse rotation than a swing arm with only a single tooth.

[0039] The swing arm beam needs to be slender to ensure good swing elasticity. However, when there are many teeth, the teeth of the swing arm tend to be coarse. Therefore, a transition connection at the neck is needed to smoothly transition the teeth of the swing arm to the slender swing arm beam.

[0040] Preferably, the teeth and neck of the swing arm head are integrally formed.

[0041] Preferably, the swing arm head and the swing arm beam are integrally formed.

[0042] Preferably, the first side of the neck is parallel to the slope of the wedge-shaped head of the stop.

[0043] Preferably, the first side of the neck is located on the first side of the radial direction of the swing arm, and the top of the first side is offset relative to its bottom towards the first side of the swing arm. The top of the first side of the neck refers to the connection between the neck and the tooth, and the bottom refers to the connection between the neck and the swing arm beam. With this configuration, after the wedge-shaped head of the stop abuts against the first side of the neck, the force applied by the wedge-shaped head to the first side of the neck will have a radially upward component. Under the action of this radially upward component, the head of the swing arm will self-lock against the groove.

[0044] Preferably, the first side of the neck is perpendicular to or forms an angle of 60° to 120° with the first tooth wall of each tooth. The first tooth wall refers to the side wall located on the first side of the tooth.

[0045] Preferably, when the swing arm head includes one or more teeth, the tooth adjacent to the first side of the neck of the swing arm head is the first tooth.

[0046] More preferably, the first side surface of the neck is perpendicular to the first tooth wall of the first tooth. The design of the relative angle between the wedge-shaped head slope and the side surface of the neck ensures that the biasing force from the cap groove on the first tooth wall of each tooth is parallel to or substantially parallel to the slope of the wedge-shaped head of the stop block. Under the action of this biasing force, even if the elastic member drives the swing arm to move radially inward, the offset trend of the swing arm head is basically consistent with the slope tendency of the wedge-shaped head of the stop block, and the gap between the swing arm head and the wedge head remains basically unchanged. Therefore, the wedge-shaped head of the stop block will not hinder the offset displacement of the swing arm head, so that the tooth of the swing arm can disengage from the cap groove. Since the included angle of the first tooth wall of one or more teeth on the swing arm head is very small, when the first tooth wall of the first tooth is perpendicular to the first side surface of the swing arm neck, the first tooth wall of the other teeth is also substantially perpendicular to the first side surface of the swing arm neck. Therefore, the biasing force from the cap groove on the first tooth wall of the remaining teeth is substantially parallel to the slope of the wedge-shaped head of the stop block.

[0047] Preferably, when the cap is subjected to an external force in the loosening direction, the loosening force causes the sidewall of the groove to bias the swing arm head, causing it to deflect. At least a portion of the swing arm head abuts against the wedge-shaped head of the stop, while the base of the stop prevents the swing arm beam from deflecting to its first side. Thus, the teeth of the swing arm remain engaged with the cap groove to prevent the cap and the winding reel from rotating in the loosening direction.

[0048] For conventional swing arm elastic component-stop-groove mechanism, the strong deformation capacity of the elastic component drives the swing arm to move and make room, making it easy for users to tighten the strap by screwing on the cap and providing a good user experience. However, the anti-reverse capability of the tightening mechanism is also reduced. In conventional swing arm structure, only the base of the stop block has a displacement limiting effect on the swing arm beam. The strong deformation capacity of the elastic component makes it easy for the connection between the swing arm and the elastic component to shift significantly under the action of a large loosening force. This causes the teeth of the swing arm to disengage from the groove of the cap, and the tightening mechanism cannot prevent reverse rotation under the action of a large loosening force, which greatly reduces the reliability of the tightening mechanism.

[0049] In this application, both the swing arm and the stop block adopt a novel structural design. The self-locking design of the neck of the swing arm head and the wedge-shaped head of the stop block can further enhance the anti-reverse function of the belt device. When the cap is subjected to an external force in the loosening direction, the sidewall of the cap groove biases the teeth of the swing arm, thereby causing the swing arm head to shift from its original position to the first side. At the same time, it forces the swing arm beam to tend to shift from its original position to the first side. However, the shift of the swing arm neck causes its first side to abut against the wedge-shaped head of the stop block and be subjected to a squeezing force from the wedge-shaped head. This squeezing force causes the teeth of the swing arm head to press further against the cap groove, forming a reverse self-locking, that is, the wedge-shaped head of the stop block and the neck of the swing arm head form a reverse self-locking. At the same time, the base of the stop block restricts the swing arm beam from swinging or shifting to its first side. Under the dual action of reverse self-locking and restricting swinging, the swing arm head cannot disengage from the engagement with the cap groove, so the cap and the winding wheel cannot rotate in the loosening direction.

[0050] Preferably, the housing is provided with one or more swing arms along the circumference, and the teeth of the swing arms protrude radially outward along the circumference. The phrase "one or more swing arms provided along the circumference" means that the ends of the swing arms are located on the same circumference, wherein the ends of the swing arms include the free end of the swing arm beam and / or the toothed end of the swing arm head.

[0051] The phrase "the swing arm head is configured to engage the screw cap groove when the swing arm is in its original position, and the swing arm beam and / or swing arm head is configured to be offset from its original position to a first or second side of the swing arm" refers to the fact that, in the absence of a stop, the swing arm structure is configured to offset to both sides of its original position, thereby allowing the groove to rotate in either the tightening or loosening direction. Because the swing arm can offset to both sides from its original position without a stop, similar to a swinging motion, it is named a swing arm.

[0052] Preferably, the one or more grooves are distributed circumferentially. The groove of this application includes a top and an open end, the open end facing the inner side of the circumference. The open end of the groove has two endpoints: the endpoint corresponding to the first side of the rocker arm tooth is called the first endpoint, and the endpoint corresponding to the second side of the rocker arm tooth is called the second endpoint. The rocker arm tooth tip corresponding to the top of the groove is also the end of the tooth of the rocker arm head.

[0053] Preferably, the screw cap has a toothed structure along its circumference, the toothed structure protruding inwards into the circumference, and the gap between adjacent toothed structures forms the groove.

[0054] Preferably, the first and second endpoints of each groove are located on the same circumference. This circumference is referred to below as the "groove endpoint circumference". This is what is meant by having one or more grooves distributed along the circumference.

[0055] Preferably, the central axis of the swing arm coincides with or is parallel to a certain radius of the circumference of the end of the groove.

[0056] Preferably, the groove is an asymmetrical groove, which includes a first sidewall and a second sidewall.

[0057] Preferably, the angle between the straight line containing the second sidewall of the asymmetrical groove and the radius corresponding to the second endpoint on the circumference of the groove endpoint is 0° to 10°.

[0058] More preferably, the straight line containing the second sidewall of the asymmetrical groove extends along the radial direction corresponding to the second endpoint on the circumference of the groove endpoint.

[0059] When the straight line containing the second sidewall of the groove in this application forms a positive acute angle with the radius corresponding to the second endpoint on the circumference of the groove endpoint, the so-called positive acute angle means that the second sidewall is located on the second side of the circumference radius.

[0060] The second sidewall coincides with the radius or is within a 10° angle range, so the force exerted by the second sidewall on the swing arm teeth is mainly a bending force, or has a partial radial outward component. This is advantageous for preventing the cap from rotating in the loosening direction because it generates a self-locking force that causes the swing arm teeth to press upward against the groove. Therefore, the contact between the teeth of the swing arm head and the second sidewall of the groove constitutes a reverse self-locking. Since the second sidewall coincides with the radius or is within a 10° angle range, even when the cap is screwed in the tightening direction, the second sidewall will exert an upward resistance on the teeth of the swing arm in the opposite direction. However, this resistance is very small and insufficient to prevent the teeth from sliding along the first sidewall of the groove. The teeth can still disengage from the groove, so the cap can still rotate smoothly in the tightening direction.

[0061] Preferably, the straight line containing the first sidewall of the groove forms an angle of 45° to 80° with the radius corresponding to the first endpoint on the circumference of the groove endpoint. The first sidewall is located on the second side of the radius corresponding to the first endpoint on the circumference of the groove.

[0062] For an asymmetrical groove, the radius of the first sidewall and the first end point form a large acute angle. In this case, the radial component of the bias force applied by the first sidewall to the teeth of the swing arm head will be relatively large. This radial component is transmitted to the elastic member along the swing arm. The elastic member deforms and causes the swing arm to move radially inward. The circumferential component perpendicular to this radial component causes the swing arm to shift to the second side. Therefore, the teeth of the swing arm head will slide along the first sidewall of the groove from the engagement position to the disengagement position, and the groove can rotate smoothly. Thus, the cap and the roll can tighten the strap in the tensioning direction. Meanwhile, the second sidewall is set to be parallel to the radius corresponding to the second endpoint. In this way, the force applied to the second tooth wall of the tooth through the second sidewall has virtually no radial component. As a result, the swing arm cannot slide radially inward to make room. At the same time, since the wedge-shaped head of the stop block prevents the swing arm head from shifting to the first side over a large range, and the base of the stop block prevents the swing arm beam from shifting to the first side, the swing arm cannot shift laterally to make room. This results in the teeth of the swing arm head always remaining engaged with the knob groove, and the cap and the roll cannot rotate in the loosening direction.

[0063] The inclined design of the tooth wall of the swing arm head, especially the inclination angle of the second tooth wall, allows the engagement between the tooth and the groove to form a reverse self-locking under the action of the loosening force. As mentioned above, the contact between the neck of the swing arm head and the wedge-shaped head of the stop also forms a reverse self-locking under the action of the loosening force. Thus, under the action of the loosening force, the teeth of the swing arm head and the groove, and the neck and the wedge-shaped head of the stop form a double reverse self-locking, greatly enhancing the anti-reverse function of the strapping device; coupled with the limiting offset effect of the stop base on the swing arm beam, the three effects are combined, so even with a strong deformation capacity of the elastic component, a single stop can achieve an effective anti-reverse function. Its anti-reverse effect is not only superior to the conventionally designed swing arm-single stop mechanism, but also superior to the conventionally designed swing arm-double stop mechanism. The innovative design of the swing arm head and the wedge-shaped head of the stop in this application cleverly utilizes a double self-locking function, which not only saves structural space but also improves the anti-reverse effect, solving the problem of poor anti-reverse effect caused by elastic components. The novel design of the swing arm head-stop wedge head, combined with the excellent deformation capacity of the elastic component, makes the tightening device not only easy to operate and has an excellent feel when tightening the strap, but also has a very reliable anti-reverse effect.

[0064] In this application, the reverse self-locking effect formed by the neck of the swing arm head and the wedge-shaped head of the stop is much stronger than the reverse self-locking effect formed by the engagement of the teeth and the groove under the action of the loosening force. The reverse self-locking formed between the neck of the swing arm head and the wedge-shaped head of the stop is the main anti-reverse mechanism of the swing arm-stop-groove mechanism.

[0065] Preferably, the elastic member is an elastic base or an elastic ring base composed of elastic bases.

[0066] The "swing arm elastic component" described in this application mainly includes two forms: telescopic swing arm and telescopic swing arm ring, which will be described separately below.

[0067] Preferably, the elastic component of the swing arm is a telescopic swing arm or a telescopic swing arm ring. The telescopic swing arm includes an elastic base and swing arms connected thereto; the telescopic swing arm ring includes an elastic ring base and multiple swing arms connected thereto. The telescopic swing arm ring can be formed by connecting multiple telescopic swing arms end to end through their elastic bases.

[0068] Preferably, the elastic base consists of two serpentine elastic elements connected in parallel.

[0069] Preferably, the elastic base is integrally molded.

[0070] Preferably, the elastic base and the swing arm are arranged in a one-to-one correspondence, and the two parallel serpentine elastic elements in the elastic base are arranged in a mirror symmetrical manner with respect to the swing arm beam of the swing arm.

[0071] Preferably, the elastic base and the corresponding swing arm are integrally formed.

[0072] Preferably, the main elastic force direction of the two parallel serpentine elastic elements is along the radial direction of the circumference of the swing arm. The so-called main elastic force direction refers to the direction with strong elastic deformation capacity. The direction perpendicular to it also has a certain deformation capacity, but the deformation capacity is weaker, or in other words, the external force threshold for causing deformation is relatively large.

[0073] Preferably, the tail of each of the two parallel serpentine elastic elements is connected to the swing arm beam. The end of the swing arm beam connected to the serpentine elastic element is called the "swing arm tail". The end of the swing arm tail is the free end of the swing arm beam.

[0074] Preferably, the connection between the tail of the swing arm and the elastic base is a trident-shaped or inverted Y-shaped structure.

[0075] Preferably, the two parallel serpentine elastic elements are connected end-to-end.

[0076] Preferably, the tail-to-tail contact area of ​​the two parallel serpentine elastic elements is configured as a radially outward convex elastic wave structure.

[0077] Preferably, the tail of the swing arm is positioned at the crest of the wave structure of the elastic part. The radially outward-protruding wave structure is similar to the crest of a wave spring.

[0078] When a wave spring is subjected to an axial load, the crests and troughs generate relative axial displacement, forming deformation energy. After the applied load is removed, the spring returns to its original shape under the action of this deformation energy, thus providing buffering, shock absorption, and compensation. Wave springs are mainly used in applications where the deformation and axial space requirements are very small, and vibration reduction is desired. The load-deformation characteristics of a wave spring are significantly affected by the unfolding angle. Specifically, at a large unfolding angle, the ends of the wave spring quickly engage in deformation after compression, causing the load-deformation characteristic curve to rise rapidly. The unfolding angle, also known as the development angle, refers to the angle at which the two lines diverge at the crest or trough position of a sine curve in this application.

[0079] Preferably, the span angle of the elastic part waveform structure is 110° to 160°.

[0080] Preferably, the heads of the two parallel serpentine elastic elements are relatively far apart.

[0081] Preferably, the heads of the two parallel serpentine elastic elements are respectively fixedly disposed on the housing.

[0082] Preferably, the elastic base includes a first serpentine elastic element and a second serpentine elastic element connected in parallel, with the first serpentine elastic element and the second serpentine elastic element respectively disposed on both sides of the swing arm beam.

[0083] Preferably, multiple elastic bases are connected to form an elastic ring base, which is integrally molded.

[0084] One of the heads of the first serpentine elastic element and the second serpentine elastic element is defined as the head of each elastic base, and the other is defined as the tail of each elastic base. For example, if the head of the first serpentine elastic element is defined as the head of each elastic base, then the head of the second serpentine elastic element is defined as the tail of each elastic base; and vice versa.

[0085] More preferably, two adjacent elastic bases are connected end to end.

[0086] Preferably, the elastic ring bases are connected end to end to form a closed-loop structure.

[0087] Furthermore, the area where two adjacent elastic bases meet end to end is constructed as a radially outward-protruding waveform structure for the fixing part.

[0088] Preferably, the waveform structure of the fixing part is provided with a fixing part, and the elastic ring base is fixedly disposed on the housing through the fixing part.

[0089] Preferably, the peaks of the waveform structure of each elastic part in the elastic ring base are located on the same circumference.

[0090] Preferably, the peaks of the waveform structure of each fixed part in the elastic ring base are located on the same circumference.

[0091] When the cap is subjected to an external force along the tensioning direction, the sidewall of the groove in the cap biases against the teeth of the swing arm head. This biasing force includes a radially inward component, which is transmitted to the elastic wave structure through the tail of the swing arm. Under the action of this radially inward component, the elastic wave structure deforms radially inward, thereby causing the tail of the swing arm to move radially inward. During this process, the radially inward component is also transmitted through the elastic wave structure to the spring plates of the two parallel serpentine elastic elements. Under this external force, the serpentine elastic elements deform and elongate radially. Since the spring plates of the serpentine elastic elements and the elastic wave structure are an integrated structure, the deformation and elongation of the serpentine elastic elements further enhances the deformation capacity of the elastic wave structure and increases the amplitude of its radial displacement.

[0092] The external force applied to the swing arm by the groove sidewall is quickly transferred to the elastic component. The elastic component converts this external force through contraction or stretching deformation, thereby causing radial displacement of the swing arm. Therefore, there is virtually no residual stress inside the swing arm or the elastic component, resulting in good reliability and durability. Moreover, the deformation of the elastic component causes radial displacement of the swing arm, making the movement of the swing arm head easier and smoother, thus effectively improving the feel of the fastening device when tightening the strap.

[0093] The radial outward extension of the swing arm beam along the circumference of the one or more swing arms is defined as: the radial extension of the orthographic projection symmetry axis of the swing arm beam along the circumference of the one or more swing arms.

[0094] The orthographic projection refers to the projection obtained by projecting a parallel projection line perpendicular to the projection plane onto the groove or swing arm, using the circumferential surface parallel to the groove or swing arm as the projection plane.

[0095] Preferably, one end face of the housing is provided with an annular platform, and the tail ends of the one or more swing arms are connected to the annular platform via an elastic member. The annular platform is used to support the one or more swing arms.

[0096] Preferably, the elastic member is fixedly disposed on the annular platform.

[0097] Preferably, the elastic member is fixed to the annular platform in a detachable or non-detachable manner.

[0098] Preferably, the elastic member is detachably and fixedly mounted on the annular platform via a snap-fit ​​structure.

[0099] Preferably, the housing is provided with a retractable swing arm ring, the retractable swing arm ring including a retractable elastic ring base and one or more swing arms arranged circumferentially, the swing arm including at least a swing arm head and a swing arm beam, the swing arm beam extending radially outward along the circumference; the swing arm is connected to the housing through the elastic ring base.

[0100] Preferably, the shrinkable elastic ring base and one or more swing arms are integrally formed to form the shrinkable swing arm ring.

[0101] Preferably, the contractile elastic ring base is formed by connecting multiple retractable swing arms end to end through an elastic base.

[0102] Preferably, the elastic ring base includes an outer ring portion and an inner ring portion, and the one or more swing arms are disposed on the inner ring portion.

[0103] Preferably, one or more swing arms extend radially outward along the circumference of the inner ring portion of the elastic ring base.

[0104] Preferably, the elastic ring base is fixedly mounted on the annular platform by a snap-fit ​​structure; the one or more swing arms are supported on the end face of the annular platform.

[0105] Preferably, the stop block is integrally formed with the annular platform.

[0106] Preferably, the teeth of the swing arm head extend beyond the outer periphery of the annular platform. The teeth extend beyond the outer periphery of the annular platform to fit into the groove of the screw cap, thereby achieving engagement between the swing arm head and the groove.

[0107] Preferably, the leading edge of the wedge-shaped head of the one or more stops is substantially flush with the outer periphery of the annular platform. "Substantially flush" means that the distance between the leading edge of the wedge-shaped head and the outer periphery of the annular platform is within ±1 mm.

[0108] Preferably, the screw cap has a cavity with a latching feature, and the cavity can at least accommodate the groove. Preferably, the groove is a circumferential groove or a segmented groove.

[0109] Preferably, the groove and the swing arm achieve axial engagement and disengagement through a stop structure. Radial engagement or disengagement of the groove and the swing arm head is achieved by offsetting the swing arm; axial engagement of the groove and the swing arm is the basis for radial engagement and disengagement. Axial engagement means that the groove and the swing arm lie on the same plane. In this application, when the groove and the swing arm are axially engaged, the circumference of the swing arm and the circumference of the groove are concentric circles. The stop structure can provide at least two stops. For example, pressing down the cap creates the first stop, where the groove engages with the teeth of the swing arm head; pulling up the cap creates the second stop, where the groove disengages axially from the teeth of the swing arm head.

[0110] Specifically, when the cap is pressed down, the cap engages with the winding reel, and the groove of the cap engages with the teeth of the swing arm head of the housing. At this time, the belt system is in the first gear position. When the cap is turned in the tightening direction, the belt will wind onto the winding reel in the tightening direction. In this gear position, due to the constraint of the stop block, the teeth of the swing arm head can only move in one direction, and the cap cannot rotate in the opposite direction, thereby achieving the function of tightening the belt and preventing it from loosening.

[0111] When the cap is pulled off, the cap disengages from the reel, and the swing arm head axially separates from the groove. The two are no longer coplanar, and the swing arm is no longer constrained by the stop block. At this time, both the cap and the reel can rotate freely clockwise or counterclockwise, thereby automatically loosening the strap.

[0112] Preferred embodiments of the gear shifting structure, the winding wheel structure, and the connection method between the winding wheel and the cap not mentioned in this application can be found in the content of patent document CN208993976U, all of which are incorporated herein by reference. In this application, the cap is equivalent to the top cover in patent CN208993976U, and the winding wheel is equivalent to the winding groove in patent CN208993976U.

[0113] However, the winding reel structure and gear shifting structure in this application are not limited to the structure disclosed in patent document CN208993976U. The winding drum-gear structure assembly in patent CN202121933315.3 is also applicable to this application, as are other winding reel structures that can realize gear shifting function and belt winding function.

[0114] Preferably, the housing is directly fixed to the item to be secured. The item to be secured includes shoes, clothing, hats, and bags, etc.

[0115] Preferably, the tying device further includes a base, the housing is fixed on the base, and the base is fixed to the item to be tied.

[0116] Preferably, the winding reel can be integrally formed with the screw cap, or fixedly connected to or detachably connected to the screw cap. When the winding reel is connected to the screw cap, the rotation of the screw cap will drive the winding reel to rotate.

[0117] This invention discloses a novel belt fastening device based on a swing arm-stop block-groove anti-reverse mechanism, wherein the swing arm and stop block are located on the housing, and the groove is located on the cap. The cap can rotate relative to the housing, that is, the groove can rotate relative to the swing arm; however, the swing arm can also rotate relative to the groove. In this case, it is only necessary to set the swing arm and stop block on the cap and set the groove on the housing to achieve the belt fastening function.

[0118] The present invention also provides a novel lacing device, comprising: a cap, a winding reel, and a housing, wherein the cap is rotatably mounted on the housing, and the winding reel is supported by the housing and can rotate relative to the housing; wherein,

[0119] The housing is provided with one or more grooves;

[0120] The reel is configured to wind up the tether when rotating in the tension direction and release the tether when rotating in the unwind direction;

[0121] The cap is provided with a rocker arm elastic assembly, which includes an elastic member and one or more rocker arms arranged circumferentially. The rocker arms are connected to the cap via the elastic member. Each rocker arm includes at least a rocker arm head and a rocker arm beam, which extends radially outward along the circumference of the one or more rocker arms. Each rocker arm includes opposing first and second sides. The rocker arm head is configured to engage a groove in the housing when the rocker arm is in its original position. The rocker arm beam and / or the rocker arm head are configured to be offset from their original position toward either the first or second side of the rocker arm.

[0122] The screw cap is further provided with one or more stops and the stops are located on the first side of the swing arm; the stops include wedge-shaped heads and the wedge-shaped heads of the stops are correspondingly provided with the heads of the swing arms;

[0123] When the cap is subjected to an external force in the tensioning direction, the stop and the elastic member allow the swing arm to be displaced relative to the groove of the housing until the swing arm head disengages from the groove of the housing, so as to allow the cap to rotate in the tensioning direction;

[0124] When the cap is subjected to an external force in the release direction, the release force causes the groove sidewall of the housing to bias the swing arm head, causing it to deflect, such that at least a portion of the swing arm head abuts against the wedge-shaped head of the stop block. The swing arm head remains engaged with the groove of the housing to prevent the cap from rotating in the release direction.

[0125] In this design, the biasing force exerted by the groove sidewall on the swing arm head when the releasing force is applied is a reverse bias. The reason for the "reverse bias" is that the biasing force originates from the resistance of the releasing force, and the biasing force or its component in a certain direction is opposite to the direction of the applied releasing force. Both positive and reverse bias are types of bias; the distinction between positive and reverse is simply based on the consistency of the direction of the biasing force with that of the external force.

[0126] When the cap is subjected to an external force in the loosening direction, the loosening force causes the swing arm head to abut against the groove sidewall of the housing. The abutting force causes the groove sidewall to bias the swing arm head in the opposite direction. Under the action of this reverse biasing force, the swing arm head is deflected, so that it at least partially abuts against the wedge-shaped head of the stop. The wedge-shaped head then applies a compressive force to the swing arm head that abuts against it. This compressive force makes it difficult for the swing arm head to deflect further, so that it can always remain engaged with the groove of the housing to prevent the cap from rotating in the loosening direction.

[0127] Preferably, the stop block further includes a base, and the base of the stop block is correspondingly disposed with respect to the swing arm beam.

[0128] Preferably, when the cap is subjected to an external force in the loosening direction, the loosening force causes the groove sidewall to bias the swing arm head in the opposite direction, causing it to deflect. At least a portion of the swing arm head abuts against the wedge-shaped head of the stop block, and the swing arm beam abuts against the base of the stop block, so that the swing arm head always remains engaged with the groove of the housing to prevent the cap from rotating in the loosening direction.

[0129] In the embodiment where the swing arm rotates, the direction of the first side of the swing arm is the tensioning direction of the belt device; the direction of the second side opposite the first side of the swing arm is the anti-reverse direction of the belt device. The novel swing arm-stop-groove mechanism provided in this application is an anti-reverse mechanism. When the teeth of the swing arm engage with the groove, the anti-reverse mechanism only allows the belt device to rotate in the tensioning direction and cannot rotate in the loosening direction.

[0130] When the swing arm rotates, the swing arm acts as the driving component. The groove on the swing arm head blocks the movement of the swing arm head. Therefore, when the cap is screwed in the tightening direction, the swing arm head is resisted by the groove on the housing, causing the swing arm head and / or the swing arm beam to move to the second side of the swing arm to make room. The cap and the winding drum can rotate in the tightening direction. However, when the cap is screwed in the loosening direction, the bias resistance applied by the sidewall of the groove to the teeth of the swing arm head causes the swing arm head to shift slightly to the first side, so that it at least partially abuts against the wedge-shaped head of the stop block. At the same time, the base of the stop block abuts against the swing arm beam, preventing the swing arm beam from shifting to the first side to make room. Therefore, the teeth of the swing arm and the groove of the housing always remain engaged, and the cap cannot rotate in the loosening direction, thereby achieving the function of preventing reverse rotation.

[0131] The present invention also provides a novel anti-reverse mechanism for a lacing device, comprising:

[0132] One or more grooves provided along the circumference;

[0133] A rocker arm elastic assembly includes an elastic member and one or more rocker arms disposed circumferentially, the elastic member being connected to the rocker arms; each rocker arm includes at least a rocker arm head and a rocker arm beam, the rocker arm beam extending radially outward along the circumference of the one or more rocker arms; each rocker arm includes opposing first and second sides, the rocker arm head being configured to engage a groove when the rocker arm is in its original position, and the rocker arm beam and / or the rocker arm head being configured to be offset from its original position toward either the first or second side of the rocker arm;

[0134] One or more stops are provided, and the stops are located on the first side of the swing arm. The stops and the swing arm are located on the same component but are separately disposed. The stops include a wedge-shaped head and a base. The wedge-shaped head of the stops is disposed corresponding to the head of the swing arm, and the base of the stops is disposed corresponding to the swing arm beam.

[0135] When the groove is subjected to an external force in the tension direction, the stop and the elastic member allow the swing arm to undergo relative displacement with the groove until the swing arm head disengages from the groove, so as to allow the groove to rotate in the tension direction;

[0136] When the groove is subjected to an external force in the release direction, the release force causes the sidewall of the groove to bias the swing arm head, causing it to deflect, such that at least a portion of the swing arm head abuts against the wedge-shaped head of the stop block, and the swing arm head always remains engaged with the groove to prevent the groove from rotating in the release direction.

[0137] The direction of the first side of the swing arm is the anti-reverse direction of the mechanism, which is the loosening direction of the belt device; the direction of the second side of the swing arm is the tightening direction of the belt device.

[0138] Only when the stop block and the swing arm are located on the same component can it be ensured that the stop block and the swing arm rotate with the rotation of the component. When the component is stationary, the stop block and the swing arm can also be relatively stationary (excluding the offset movement of the swing arm).

[0139] Preferably, when the groove is subjected to an external force in the release direction, the release force causes the sidewall of the groove to bias the swing arm head, causing it to deflect. At least a portion of the swing arm head abuts against the wedge-shaped head of the stop block, and the swing arm beam abuts against the base of the stop block, so that the swing arm head always remains engaged with the groove to prevent the groove from rotating in the release direction.

[0140] Preferably, the elastic component of the swing arm is a telescopic swing arm or a telescopic swing arm ring. Preferably, the stop block is provided in a one-to-one correspondence with the swing arm.

[0141] Preferably, the swing arm head includes teeth and a neck.

[0142] Preferably, the swing arm head includes one or more teeth.

[0143] Preferably, the first side of the neck of the swing arm head is arranged parallel to the slope of the wedge-shaped head of the stop.

[0144] The beneficial effects of this invention include the following aspects:

[0145] 1. A novel anti-reverse mechanism based on a swing arm-stop-groove is provided, which is applied to the belt fastening device, enriching the types of belt fastening devices and increasing the diversity of user choices;

[0146] 2. The ingenious design and coordination of the wedge-shaped head of the stop block and the neck of the swing arm enable the cap to form a reverse self-locking under the action of the loosening force, further enhancing the anti-reverse performance of the anti-reverse mechanism;

[0147] 3. The self-locking of the wedge-shaped head of the stop block and the neck of the swing arm, as well as the self-locking of the teeth of the swing arm and the second side wall of the groove, constitute a double self-locking effect under the loosening force. In addition, the base of the stop block restricts the reverse displacement of the swing arm beam. The three effects are combined into one, which greatly enhances the anti-reverse performance of the belt device. Only one stop block is needed to achieve the anti-reverse effect that is better than two stops corresponding to one swing arm. The design is ingenious and the anti-reverse effect is significant.

[0148] 4. The double teeth of the swing arm head and the groove mesh together, further enhancing the anti-reverse effect of the mechanism;

[0149] 5. The deformation capacity of the elastic component in the swing arm elastic assembly makes the tightening device easier to operate and provides a better feel when tightening the strap; the new structural design of the swing arm-stop block makes up for the disadvantage of the large elastic component in anti-reverse performance, so that the tightening device also has excellent anti-reverse performance; the strapping device using this new anti-reverse mechanism not only provides a better feel when tightening the strap, but also effectively prevents the strap from accidentally coming loose. Attached Figure Description

[0150] Figure 1 An exploded view of an embodiment of the lacing device based on the novel swing arm-stop-groove mechanism of the present invention;

[0151] Figure 2 yes Figure 1 Schematic diagram of the structure of the telescopic swing arm ring;

[0152] Figure 3 yes Figure 1 A schematic diagram of the combined structure of the housing and the telescopic swing arm ring in the lacing device shown;

[0153] Figure 4 yes Figure 1 An orthographic projection view of the combined structure of the housing and telescopic swing arm ring in the lacing device shown;

[0154] Figure 5a yes Figure 1 Top view of the process of the swing arm moving and making way when an external force is applied in the tensioning direction to the belt device shown (position of the teeth of the swing arm engaging with the groove);

[0155] Figure 5b yes Figure 5a A magnified view of a section at point A1;

[0156] Figure 6a for Figure 1 The top view of the process of the swing arm moving and making way when an external force is applied in the tensioning direction to the tethering device shown (position of the swing arm during the intermediate process of making way);

[0157] Figure 6b yes Figure 6a A magnified view of a section at point A2 in the middle;

[0158] Figure 7a for Figure 1 The top view of the process of the swing arm moving and yielding when an external force is applied in the tension direction to the tethering device shown (critical position of swing arm yielding);

[0159] Figure 7b for Figure 7a A magnified view of a section at point A3;

[0160] Figure 8a for Figure 1 Top view of the different positions where the swing arm moves and makes room when an external force is applied in the tensioning direction to the belt device shown (the position where the teeth of the swing arm re-engage with the groove);

[0161] Figure 8b for Figure 8a Enlarged view of section A4 in the middle;

[0162] Figure 9a yes Figure 1 The top view of the swing arm-stop-groove mechanism when an external force is applied to the lacing device in the loosening direction;

[0163] Figure 9b yes Figure 9a A magnified view of a portion of point C2 and its force analysis diagram;

[0164] Figure 10a yes Figure 1 A schematic diagram of a pair of proportions of the embodiment shown, in which the swing arm and the groove are in their original positions;

[0165] Figure 10b yes Figure 10a A magnified view of a section at point E in the middle;

[0166] Figure 11a yes Figure 10a The diagram shown is a schematic diagram of the anti-reverse failure of the swing arm-stop mechanism in the comparative example.

[0167] Figure 11b yes Figure 11a A magnified view of the area at position E1;

[0168] Figure 12a yes Figure 1 The illustrated embodiment shows a top view of the middle position of the swing arm after the stop block is removed and the arm moves in the opposite direction to make way.

[0169] Figure 12b yes Figure 12a A magnified view of the area at position D2 in the middle;

[0170] Figure 13 This is a schematic diagram of another implementation of the swing arm in the lacing device;

[0171] Figure 14a This is a top view of the middle position of the swing arm when an external force is applied in the tensioning direction in another embodiment of the lacing device;

[0172] Figure 14b yes Figure 14a A magnified view of a section at point B1;

[0173] Figure 15a yes Figure 14a The top view of the swing arm-stop-groove mechanism when an external force is applied to the lacing device in the loosening direction;

[0174] Figure 15b yes Figure 15a A magnified view of the area at point B2 and its stress analysis diagram. Detailed Implementation

[0175] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0176] It should be understood that the terms "upper", "lower", "left", "right", "front", "back", "length", "width", "horizontal", "vertical", "top", "bottom", "inner", and "outer" used in the description of this invention are based on the orientation or positional relationship shown in the accompanying drawings and are intended to facilitate the description of this invention and simplify the description. They should not be construed as a limitation that the device or component referred to must have a specific orientation or positional relationship.

[0177] Furthermore, the terms "first" and "second" are used solely for distinguishing purposes and do not imply relative importance, nor do they indicate or suggest the number of technical features. Therefore, a feature defined by "first" or "second" may explicitly or implicitly indicate that there is one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise expressly defined.

[0178] Unless otherwise explicitly specified, the terms "connection" and "fixation" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrally formed connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0179] The novel one-way anti-reverse mechanism based on a swing arm-stop block-groove and the novel fastening device including the same mechanism are described in detail below with reference to the accompanying drawings and specific embodiments.

[0180] Example 1

[0181] like Figure 1 As shown, a novel lacing device includes a base 1, a spool assembly A, a housing 4, a telescopic swing arm ring 5, and a cap 6. The base 1 can be fixedly mounted on a shoe upper, shoe tongue, clothing, hat, or bag. The top end face of the housing 4 is fixedly connected to the swing arm ring 5 via a snap-fit ​​structure 42. The spool assembly A includes an elastic stop pin 2 and a winding wheel 3. The structure of the spool assembly A and its connection method with the cap 6 can be found in patent document CN202121933315.3.

[0182] like Figure 2 As shown, the telescopic swing arm ring 5 includes a centrally located retractable elastic ring base 51 and one or more swing arms 52 arranged circumferentially. Each swing arm 52 includes a swing arm head 521 and a swing arm beam 522. In this embodiment, three swing arms are provided, evenly spaced, with each swing arm beam 522 extending radially along the circumference of the elastic ring base. As shown, the swing arm head 521 includes two teeth 5211 and 5212 and a neck 5213. The shape of each tooth 5211 and 5212 corresponds to the groove on the screw cap (see Figure 1). Figure 5bThe shapes of 6511 and 6512 are identical, both being angular, allowing them to engage or disengage with the groove on the screw cap 6; the overall shape of the neck 5213 and the swing arm beam 522 resembles an axe. The elastic ring base 51 includes three elastic bases 511, each formed by a first serpentine elastic element 5111 and a second serpentine elastic element 5112 connected in parallel. The first serpentine elastic element 5111 and the second serpentine elastic element 5112 are respectively located on both sides of each swing arm 52 and are arranged in a mirror-symmetrical manner about the swing arm beam 522. The main elastic force direction of the two serpentine elastic elements 5111 and 5112 is approximately radially along the circumference. The tails W1 and W2 of the two parallel serpentine elastic elements 5111 and 5112 connect to form a radially outward-protruding elastic wave structure E. The tail 523 of the swing arm 52 is located at the crest of the elastic wave structure E, and the connection point has a shape resembling an inverted Y. The elastic wave structure E has a spread angle of 120°. The heads H1 and H2 (which are also the head H1 and tail H2 of the elastic base) of the two parallel serpentine elastic elements are relatively far apart and are fixedly mounted on the housing 4. The three elastic bases are connected end to end to form a closed loop-shaped stretchable elastic ring base 51, which is integrally molded. The end of the elastic base protrudes radially outward to form a fixed wave structure S. A snap-fit ​​structure 512 is provided near the crest of the fixed wave structure S, and a corresponding slot 42 is provided on the housing (see details). Figure 3 This is used to fix the elastic ring base 51 to the housing 4. Because the elastic wave structure E protrudes radially outward, its deformation capacity is very strong when the peak of the wave structure is subjected to radially inward pressure.

[0183] Figure 3 This is a schematic diagram of the combined structure of the housing and the telescopic swing arm ring. (Example) Figure 3 As shown, the housing 4 includes an annular platform 43 with a through hole in the center for the elastic stop pin 2 to pass through, exposing the engagement teeth of the winding reel 3 so as to engage with the engagement teeth of the screw cap. One or more stops 44 are integrally formed on the end face of the annular platform 43 near its outer periphery. Each stop 44 corresponds to a swing arm 52 and is located adjacent to the same side (clockwise or counterclockwise side, in this embodiment, counterclockwise side (also called the first side)) of the swing arm 52. Each stop 44 includes a wedge-shaped head 441 and a base 442. The wedge-shaped head 441 corresponds to the swing arm head 521, and the base 442 corresponds to the swing arm beam 522. Figure 4As shown, the first tooth wall TS1 of each tooth is perpendicular to the first side surface NS1 of the neck (α = 90°), and the slope 4411 of the wedge-shaped head 441 of the stop is parallel to the first side surface NS1 of the neck. In other preferred embodiments, the angle α between the first tooth wall TS1 of each tooth 5211 and the first side surface of the neck 5213 can also be set to other angles within the range of 60° to 120°, as long as the first side surface NS1 is always located on the first side (counterclockwise side) of the radial direction of the swing arm and offset in the counterclockwise direction (which can be combined with...). Figure 5b (See description). The stop 44 is used to prevent the swing arm 52 from moving counterclockwise (first side direction), thereby preventing the cap from rotating counterclockwise; the fastening device using this new stop-telescopic swing arm ring structure is clockwise in the direction of tightening the fastening, so the stop 44 can prevent the cap and the winding wheel from rotating counterclockwise under the action of loosening force, thereby avoiding accidental disengagement of the fastening in the tightened state. The housing 4 is also provided with a ring of buckle protrusions 41, and the corresponding inner wall of the cavity of the cap 6 has at least one buckle (not shown), and the cap 6 is pressed against the outer periphery of the housing to form an integral locking structure of the fastening device.

[0184] When assembling the strapping device, first, the end face of the annular platform 43 of the housing 4 is fastened to the telescopic swing arm ring 5. Then, the screw cap 6 is fastened with the meshing teeth and pressed onto the housing 4. Next, the bobbin assembly A is inserted into the housing 4 from the bottom (the housing 4 has an inner cavity). One end of the elastic stop pin passes through the central through hole of the housing 4. Finally, the strap is threaded through, and the housing 4 is fixed to the base 1. The strapping device is then assembled.

[0185] When using this lacing device, press the cap 6 firmly until you hear a "click," indicating that the teeth on the cap 6 are engaged with the teeth on the reel 3. Rotating the cap 6 at this point will cause the reel 3 to rotate as well. Turning the cap 6 in the tightening direction will produce a crisp "click-click" sound. At this point, the teeth 5211 of the swing arm head engage with the groove on the cap, and the end face teeth on the cap and reel are engaged. The cap 6 drives the reel 3 to rotate in the tightening direction, and the lacing strap winds around the winding groove of the reel 3, gradually tightening the item until the tightness feels comfortable. If it feels too tight, pull up the cap 6. The end face teeth on the cap and reel will disengage, causing the taut lacing strap to reverse, loosening the item. Press the cap 6 again and repeat the tightening action to adjust the tightness of the item to a comfortable level.

[0186] Combination Figures 5a-8b In this embodiment, the process of the swing arm moving to make way when the cap is turned in the tightening direction (clockwise) is as follows: Figure 5b As shown, in position A1, the teeth 5211 and 5212 of the swing arm engage with the grooves 6511 and 6512 of the screw cap, as... Figure 5a and 5b As shown, the screw cap has a ring of teeth around its circumference, and grooves 6511 and 6512 are the gaps between adjacent teeth; the swing arm is in its naturally extended state, and the radial direction of the swing arm is R0 (in this embodiment, the direction of R0 is set to the vertical direction). The first side of the swing arm neck is located on the first side of the radial direction R0 of the swing arm, and its top T0 is offset from its bottom B0 towards the first side of the swing arm. The angle between the first side and the radial direction R0 of the swing arm is β = 30°. In other embodiments, this angle β can be other acute angles. When the cap is screwed clockwise, the groove is subjected to a clockwise screwing force. Taking one of the tooth-groove pairs as an example, the first sidewall BL1 of the groove 6512 presses against the tooth 5212 of the rocker arm, forcing the rocker arm head and rocker arm beam 522 to shift and make way in the direction of the pressing force F1. The pressing force F1 is perpendicular to the first sidewall BL1 and parallel to the slope 4411 of the stop wedge head 441. Therefore, under the action of the pressing force F1, the rocker arm head tends to move parallel to the slope 4411 of the stop wedge head. Or nearly parallel, so the wedge-shaped head of the stop will not hinder the movement of the swing arm head in this direction. At the same time, part of the compressive force applied to the swing arm tooth 5212 by the sidewall BL1 of the groove 6512 is transmitted along the swing arm beam 522 to the elastic base 511 connected to it, and forces the elastic base 511 to undergo elastic deformation, thereby further driving the swing arm beam to move radially inward; thus, the first sidewall TS1 of the swing arm tooth 5212 can slide along the first sidewall BL1 of the groove 6512 in the direction from A1 to A2; continuing When a screwing force is applied, the tooth 5212 of the swing arm slides along the first sidewall BL1 of the groove to the first end point DD1 of the groove. At this time, the offset of the swing arm head is at its maximum and reaches the critical position A3. This critical position is unstable. Under the restoring force of the swing arm and the elastic base 511, the tooth 5212 of the swing arm quickly engages with the next groove 6513 and reaches the re-engagement position A4. At this time, the groove advances one step in the clockwise direction. By repeating the previous tightening action, the cap and the winding wheel can be rotated one circle at a time.

[0187] Combination Figure 9a and 9bIn this embodiment, when the cap is screwed in the loosening direction (counterclockwise), the second sidewall BL2 of the groove biases the teeth of the swing arm. As shown in the figure, the two teeth of the swing arm are respectively subjected to biasing force F2. The biasing force F2 includes a circumferential component F21 in the counterclockwise direction and an upward radial component F22. Under the action of the circumferential component F21, the swing arm head shifts counterclockwise, causing the first side NS1 of the neck 5213 of the swing arm to abut against the slope 4411 of the wedge-shaped head of the stop block. The swing arm beam abuts against the base of the stop block. A diagonally upward compressive force P1 is applied to the neck 5212, and a transverse compressive force P2 is applied to the swing arm beam from the base of the stop block. The compressive force P1 is basically in the same direction as the first sidewall of the swing arm teeth, and has an upward radial component P12 and a circumferential component P11. The circumferential component P11 can partially offset the circumferential component of the bias force F2. The combined force of the compressive force P1 and the bias force F2 causes the swing arm teeth to press upward against the screw cap groove. That is, the compressive force applied to the swing arm by the stop block forms the first self-locking force for the swing arm teeth and the screw cap groove to engage. At the same time, the compressive force P2 applied to the swing arm beam from the base of the stop block is basically a circumferential force, which can limit the swing arm from swinging counterclockwise. The radial component of the bias force F2 on each tooth corresponds to the radial direction R1 or R2 where the second end point DD2 of each tooth is located. The radial component of the compressive force P1 applied to the neck 5212 by the slope 4411 refers to... Figure 5b The R0 direction in this embodiment. In this embodiment, the same reference numerals are used to label the same structure. If a corresponding reference numeral is not present in a single drawing, the drawing with the corresponding structural reference numeral can be referred to.

[0188] On the other hand, the angle between the straight line BL2 containing the second sidewalls of the two adjacent grooves and the radius R1 / R2 corresponding to their second endpoints DD2 is θ = 10°. Therefore, the biasing force F2 applied by the second sidewall BL2 of the groove to the swing arm teeth will have an upward radial component F22 along the radius R1 or R2 where the second endpoint DD2 is located. This upward radial component also causes the swing arm teeth to press against the groove sidewall, forming a second self-locking force that engages the swing arm teeth with the screw cap groove. In this way, the double self-locking force and the reverse swing restriction are combined into one, greatly enhancing the anti-reverse performance of the belt device. Only one stop is needed to achieve a better anti-reverse effect than two stops corresponding to one swing arm. The design is ingenious and the anti-reverse effect is significant.

[0189] like Figure 10a and 10b The illustrated example shows a comparative model of a swing arm-stop-groove mechanism. In this model, the groove and the elastic base have identical structures, hence the same reference numerals; the difference lies in the structural design of the swing arm and the stop. More specifically, as... Figure 10bAs shown, in this comparative example, the swing arm head only includes the toothed part, without the neck, and has only one tooth 5212'. The structure of the single tooth is the same as that of Embodiment 1. The stop block 44' does not have a wedge-shaped head, but only the base is adjacent to the swing arm beam 522. The structure of the swing arm beam 522 is the same as that of Embodiment 1.

[0190] When the cap is turned counterclockwise, the second sidewall BL2 of the groove 6512 applies a compressive force to the second tooth wall TS2' of the swing arm tooth 5212'. Although this compressive force has a radial outward component, this component is very small, and most of it is a circumferential component. When the applied loosening force is small, the swing arm cannot move away from the groove due to the obstruction of the stop 44', so the cap cannot rotate counterclockwise; combined with Figure 11b However, once the applied releasing force exceeds a certain threshold, the circumferential component of this releasing force forces the swing arm to deflect. At this point, the swing arm abuts against the stop block, and the contact point between the stop block and the swing arm forms the fulcrum P of the lever. Further increasing the releasing force, the first sidewall BL1 of the groove also applies a certain compressive force to the swing arm teeth. This compressive force has a radially inward component. As the releasing force continues to increase, the radially inward compressive force is transmitted to the elastic base 511. Due to the strong deformation capacity of the elastic base, elastic deformation will occur even when the radially inward force is small. Therefore, the contact between the swing arm teeth and the second sidewall of the groove gradually becomes point contact. The compressive force applied to the swing arm teeth by the screw cap groove is equivalent to external pressure on one end of the lever. According to the lever principle, under the action of this force, coupled with the easily deformable characteristic of the elastic base, the tail of the swing arm will lift up. As the degree of tail lifting increases, the obstruction effect of the stop block on the swing arm gradually decreases, and the swing arm teeth gradually disengage from the groove until... Figure 11bAt the critical position shown, only the apex of the tooth 5212' contacts the first end point DD1 of the groove 6512. During this process, the contact point P (equivalent to the fulcrum of the lever) between the stop and the swing arm may continuously change position on the swing arm as the swing arm shifts. Due to the instability of the critical position, under the restoring force of the swing arm and the elastic base 511, the tooth 5212' of the swing arm quickly engages with the next groove 6511, achieving re-engagement. At this time, the groove advances one step in the counterclockwise direction. With the continuous application of a large loosening force, the cap and the winding wheel can rotate one circle after another in the counterclockwise direction. The fastening device loses its function of preventing reverse rotation. Therefore, the structural design of the stop and the swing arm head in the comparative example cannot prevent the accidental loosening of the strap under a large loosening force (a loosening force exceeding a certain threshold). This is because when the loosening force exceeds a certain threshold, the swing arm-stop-groove mechanism loses its function of preventing reverse rotation. Therefore, in special outdoor situations, if the loosening force increases unexpectedly, the strap may loosen. Therefore, while the easily deformable nature of the elastic base 511 has a good effect on improving the feel when tightening the strap, it also increases the risk of the strap coming loose. The swing arm-stop-groove mechanism used in the comparison only has the upward self-locking effect of the swing arm teeth and groove and the anti-deflection function of the stop base. This dual function can only be used for small loosening forces. When the loosening force exceeds a certain threshold, the anti-reverse function is lost. Therefore, the tightening device using this mechanism can only prevent the strap from coming loose for small loosening forces.

[0191] Figure 12a and Figure 12b yes Figure 1 The illustrated embodiment shows a top view and a partial enlarged view of the middle position D2 where the swing arm moves in the opposite direction to make way after the stop block is removed. (Combined with...) Figures 5a-8b and Figure 12a , 12b It can be seen that the swing arm structure provided by this invention can achieve bidirectional movement and clearance without the presence of a stop block. The lateral displacement of the swing arm is not only due to the displacement of the swing arm beam 522 itself, but also to the important role played by the elastic deformation of the elastic base 511. The excellent deformation capacity of the elastic base 511 reduces the difficulty of swing arm displacement and improves the user's handling feel. The movement and clearance of the swing arm is not only limited to lateral displacement, but also includes radial inward movement. The mechanism for radial inward movement of the swing arm relies on the elasticity of the elastic base. In this embodiment, the elastic base can not only expand and contract radially, but also undergo local torsion in the circumferential direction, thereby driving the swing arm to move radially inward, while also allowing lateral displacement.

[0192] In other preferred embodiments, the swing arm head may include only one tooth 5211', such as Figure 13 As shown, compared to a swing arm head with two teeth, the two-toothed type has a better anti-reverse rotation effect.

[0193] In other preferred embodiments, the counterclockwise direction can be set as the direction of tightening the strap, and the clockwise direction can be set as the direction of loosening the strap. In this case, the stop block should prevent the swing arm from swinging in the clockwise direction. Therefore, the setting position of the stop block should be set reasonably according to the actual situation.

[0194] Example 2

[0195] This embodiment is basically the same in structure as Embodiment 1, except that the positions of the swing arm-stop and the grooves are interchanged. Specifically, in this embodiment, the swing arm X52-stop X44 mechanism is mounted on the cap, while the grooves K6511 and K6512 are mounted on the housing. In actual use, the swing arm X52-stop X44 structure rotates with the cap; the grooves K6511 and K6512 remain stationary, and the sidewalls of the grooves K6511 and K6512 create resistance to the movement of the swing arm teeth. This resistance causes the swing arm to bend and deform to swing and make way. Figure 14b As shown, the clockwise direction indicated by the arrow is the direction for tightening the strap. When an external force is applied to the cap in a clockwise direction, the groove sidewall applies a reverse resistance F3 to the swing arm teeth, forcing the swing arm X52 (swing arm head and / or swing arm beam) to shift counterclockwise. The stop block X44 is located in the clockwise direction of the swing arm, so the stop block X44 allows the swing arm X52 (swing arm head and / or swing arm beam) to shift counterclockwise to make room, allowing the cap to rotate clockwise. Figure 15b As shown, when a counterclockwise screwing force is applied to the cap, the swing arm X52 attempts to rotate counterclockwise. At this time, the other sidewalls of the grooves K6511 and K6512 apply a reverse resistance F4 to the swing arm teeth, forcing the swing arm to shift clockwise. However, since the stop block X44 is located clockwise of the swing arm X52, the base of the stop block X442 prevents the swing arm beam X522 from shifting clockwise to make room. Only the swing arm head can shift slightly clockwise until its neck X5213 abuts against the wedge-shaped head X441 of the stop block. The slope of the wedge-shaped head X441 applies an upward squeezing force P3 to the swing arm neck X5213. P3 includes an upward component force P31, which makes the swing arm teeth always engage with the groove. Therefore, the swing arm teeth cannot disengage from the groove, and the cap cannot rotate in the opposite direction. Counterclockwise is the reverse direction.

[0196] The difference between this embodiment and Embodiment 1 is that in this embodiment, the direction in which the cap can rotate is opposite to the direction in which the swing arm can swing; while in Embodiment 1, the direction in which the swing arm can swing and make way is consistent with the direction in which the cap can rotate. This difference arises because it depends on whether the groove or the swing arm is located on the driving member. The force that forces the swing arm to shift laterally comes from the pressure of the groove sidewall on the swing arm teeth. When the groove is located on the driving member, this pressure is essentially the same as the applied external force, so the direction of the swing arm's shift is consistent with the direction of rotation. When the swing arm is located on the driving member, this pressure is a reverse force, so the direction of the swing arm's shift is opposite to the direction of rotation.

[0197] The descriptions of the first and second sides of the swing arm and the groove in this application are consistent. This orientation is based on the state after the screw cap and housing are assembled; in other words, it is based on the orientation of the swing arm-groove structure in actual use. The first side of the groove corresponds to the first side of the swing arm, and the second side of the groove corresponds to the second side of the swing arm. For example, if the left side of the swing arm is considered the first side, then the right side of the swing arm can be considered the second side.

[0198] In other preferred embodiments, three retractable swing arms can be spaced apart, with each retractable swing arm individually fixed to the housing or the screw cap; this can also achieve a good anti-reverse rotation effect.

[0199] The above description is merely a preferred embodiment of the present invention and is a further detailed description of the present invention in conjunction with specific preferred embodiments. It should not be construed that the specific implementation of the present invention is limited to these descriptions. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel lacing device, comprising: A screw cap, a reel, and a housing, wherein the screw cap is rotatably mounted on the housing, and the reel is supported by the housing and can rotate relative to the housing; characterized in that... The screw cap is provided with one or more grooves; The reel is configured to wind up the tether when rotating in the tension direction and release the tether when rotating in the unwind direction; The housing is provided with a swing arm elastic assembly, which includes an elastic member and one or more swing arms. Each swing arm includes at least a swing arm head. The swing arm includes a first side and a second side, and the swing arm head is configured to engage a groove of the screw cap when the swing arm is in its original position. The swing arm head is also configured to be offset from its original position toward either the first side or the second side of the swing arm. The direction of the first side is the loosening direction of the strap device, and the direction of the second side is the tightening direction of the strap device. The housing is further provided with one or more stops and the stops are located on the first side of the swing arm; the stops include wedge-shaped heads and the wedge-shaped heads of the stops are correspondingly provided with the heads of the swing arms; When the cap is subjected to an external force in the tensioning direction, the stop and the elastic member allow the swing arm to move relative to the groove of the cap until the swing arm head disengages from the groove of the cap, so as to allow the cap to rotate in the tensioning direction. When the cap is subjected to an external force in the release direction, the external force in the release direction causes the groove sidewall of the cap to bias the swing arm head, causing it to shift toward the first side, such that at least a portion of the swing arm head abuts against the wedge-shaped head of the stop block, and the swing arm head always remains engaged with the groove of the cap to prevent the cap from rotating in the release direction.

2. The lacing device according to claim 1, characterized in that, The swing arm also includes a swing arm beam, and the stop block also includes a base, with the base of the stop block corresponding to the swing arm beam.

3. The lacing device according to claim 2, characterized in that, The swing arm head includes teeth and a neck. When the cap is subjected to an external force in the release direction, at least a portion of the neck of the swing arm head abuts against the wedge-shaped head of the stop, the base of the stop preventing the swing arm beam from shifting to its first side.

4. The lacing device according to claim 3, characterized in that, The slope of the wedge-shaped head of the stop block is adjacent to the first side of the neck of the swing arm head, the top of the slope is offset relative to the bottom of the slope towards the first side of the wedge-shaped head, wherein the bottom of the wedge-shaped head is adjacent to the base of the stop block.

5. The lacing device according to claim 1, characterized in that, The swing arm head includes one or more teeth.

6. The lacing device according to claim 3, characterized in that, The neck of the swing arm head has a first side surface, and the angle between the first side surface of the neck and the first tooth wall of each tooth is any angle within the range of 60° to 120°.

7. The lacing device according to claim 3, characterized in that, The neck of the swing arm head has a first side surface, which is parallel to the slope of the wedge-shaped head of the stop.

8. The lacing device according to claim 1, characterized in that, The elastic component of the swing arm is a telescopic swing arm or a telescopic swing arm ring.

9. The lacing device according to claim 1, characterized in that, The elastic member is connected to at least one of the swing arms.

10. The lacing device according to claim 2, characterized in that, The one or more swing arms are arranged circumferentially, and the swing arm beam extends radially along the circumference of the one or more swing arms.

11. A novel lacing device, comprising: A screw cap, a reel, and a housing, wherein the screw cap is rotatably mounted on the housing, and the reel is supported by the housing and can rotate relative to the housing; characterized in that... The housing is provided with one or more grooves; The reel is configured to wind up the tether when rotating in the tension direction and release the tether when rotating in the unwind direction; The screw cap is provided with a swing arm elastic assembly, which includes an elastic member and one or more swing arms. Each swing arm includes at least a swing arm head. The swing arm includes a first side and a second side opposite to each other. The swing arm head is configured to engage a groove in the housing when the swing arm is in its original position. The swing arm head is also configured to be offset from its original position toward either the first side or the second side of the swing arm. The direction of the first side is the tensioning direction of the strap device, and the direction of the second side is the loosening direction of the strap device. The cap is further provided with one or more stops and the stops are located on the first side of the swing arm; the stops include wedge-shaped heads and the wedge-shaped heads of the stops are correspondingly provided with the heads of the swing arms; When the cap is subjected to an external force in the tensioning direction, the stop and the elastic member allow the swing arm to be displaced relative to the groove of the housing until the swing arm head disengages from the groove of the housing, so as to allow the cap to rotate in the tensioning direction; When the cap is subjected to an external force in the release direction, the external force in the release direction causes the groove sidewall of the housing to bias the swing arm head, causing it to shift toward the first side, such that at least a portion of the swing arm head abuts against the wedge-shaped head of the stop block, and the swing arm head always remains engaged with the groove of the housing to prevent the cap from rotating in the release direction.

12. A novel anti-reverse mechanism for a belt fastening device, characterized in that, include: One or more grooves provided along the circumference; A swing arm elastic assembly includes an elastic member and one or more swing arms disposed circumferentially, the elastic member being connected to at least one of the swing arms; the swing arm includes at least a swing arm head, the swing arm including opposing first and second sides, the swing arm head being configured to engage the groove when the swing arm is in its original position, and the swing arm head being configured to be offset from its original position toward the first or second side of the swing arm. One or more stops are provided, and the stops are located on the first side of the swing arm. The stops and the swing arm are located on the same component but are separately disposed. The stops include wedge-shaped heads, and the wedge-shaped heads of the stops are disposed corresponding to the heads of the swing arms. When the groove is subjected to an external force in the tension direction, the stop and the elastic member allow the swing arm to undergo relative displacement with the groove until the swing arm head disengages from the groove, so as to allow the groove to rotate in the tension direction; When the groove is subjected to an external force in the release direction, the external force in the release direction causes the sidewall of the groove to bias the swing arm head and shift it toward the first side, so that at least a portion of the swing arm head abuts against the wedge-shaped head of the stop block, and the swing arm head always remains engaged with the groove to prevent the groove from rotating in the release direction; Wherein, the direction of the first side of the swing arm is the loosening direction of the lacing device, and the direction of the second side of the swing arm is the tightening direction of the lacing device.

13. The novel anti-reverse mechanism according to claim 12, characterized in that, The swing arm also includes a swing arm beam, and the stop block also includes a base, with the base of the stop block corresponding to the swing arm beam.

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