Anti-block ratchet tensioning device

Abstract

Anti-block ratchet tensioning device, comprising: basic body; and Winding and unwinding mechanism, rotatably arranged on the base body, wherein the winding and unwinding mechanism comprises a ratchet with wheel teeth; and Actuating mechanism with an actuating part that is operatively connected to the ratchet and controls its rotation and locking; and The operating part includes: Elastic non-return pawl, elastically adjustable, mounted on the operating mechanism, at least one portion of which is located within the rotation radius of the ratchet; and The elastic non-return pawl is structured to: When the ratchet rotates counterclockwise, blocking the passage of the wheel teeth and thereby locking the ratchet; and When the ratchet is turned clockwise, the wheel teeth trigger an elastic evasive movement that allows the wheel teeth to slide.

Description

TECHNICAL FIELD

[0001] The present invention relates to the art of tensioners, in particular to an anti-block ratchet tensioning device. STATE OF THE ART

[0002] A turnbuckle is a tool that plays a vital role in the transportation, movement, shipping, or storage of goods. It is primarily used to reinforce steel formwork, compress wooden boards, or secure other goods through tensile force. Turnbuckles are an important mechanical accessory primarily used for adjusting and securing lashing devices such as ropes, rope nets, or straps. In cargo transportation and storage, turnbuckles can ensure the stability and safety of goods during transportation and prevent damage from shocks or collisions.

[0003] In the German patent application, the invention patent with publication number DE102007020856A1 also discloses a tensioner. The patented anti-kickback pawl and locking pawl are typically arranged separately, and the anti-kickback pawl and locking pawl must interact with each other to achieve a non-kickback pawl from the stop state. This leaves the tensioner's operation unchanged, which also makes the tensioner structure more complex and increases processing and manufacturing costs.

[0004] Therefore, it is necessary to propose a new type of clamp which is simple and compact in structure, convenient to operate and cost-effective in manufacturing. CONTENTS OF THE PRESENT UTILITY MODEL

[0005] The present invention provides an anti-lock ratchet tensioner to solve the problems set forth in the above background art.

[0006] To achieve the stated objective, an anti-blocking ratchet tensioning device is provided, comprising: a base body; a winding and unwinding mechanism rotatably mounted on the base body, the winding and unwinding mechanism comprising a ratchet with wheel teeth; an actuating mechanism having an actuating part operatively connected to the ratchet and controlling its rotation and locking; wherein the actuating part comprises: A resilient non-return pawl, resiliently adjustable and mounted on the operating mechanism, at least a portion of which is located within the rotation radius of the ratchet; wherein the resilient non-return pawl is structured to: block passage of the wheel teeth during counterclockwise rotation of the ratchet, thereby locking the ratchet; and to trigger a resilient deflection movement through the wheel teeth during clockwise rotation of the ratchet, allowing the wheel teeth to slide.

[0007] In summary, the present invention achieves the following technical effects: By arranging the locking piece and the elastic non-return pawl separately, the latter can perform a slight deflection or evasive movement as the wheel teeth slide due to the elasticity of the torsion spring. This reduces frictional forces and resistance between the elastic non-return pawl and the wheel teeth, enables smooth overrun of the wheel teeth, and avoids rigid collisions and stagnation phenomena. This significantly increases operating smoothness and achieves a power-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 shows a schematic representation of the structure of the present invention. Fig. 2 shows a schematic representation of the structure from a different perspective of Fig. 1. Fig. 3 shows a cross-sectional structure plan of Fig. 2. Fig. 4 shows a sectional structure plan in the longitudinal direction of Fig. 2. Fig. Figure 5 shows an exploded view of the present invention. Fig. Figure 6 shows a schematic diagram of the structure of the actuating mechanism of the present invention. Fig. Figure 7 shows a schematic representation of the structure from a different perspective of Fig. 6. Fig. Figure 8 shows a schematic representation of the lever piece. Fig. Figure 9 shows a schematic representation of the structure from a different perspective of Fig. 8. Fig. Figure 10 shows the interacting state diagram between the ratchet and resilient non-return pawl of the present invention. Fig. 11 shows a schematic structural diagram of another embodiment of Fig. 8. Fig. 12 shows a schematic structural diagram from a different perspective of Fig. 11. Fig. 13 shows a schematic structural diagram after removing the pin shaft in Fig. . Fig. 14 shows a schematic structural diagram after the embodiment of Fig. 11 are attached to the base body. Fig. 15 shows a schematic structural view of the actuating mechanism in another embodiment of the present invention. Fig. 16 shows a schematic structural view from a different perspective of the Fig. 15 illustrated embodiment. Fig. 17 shows a schematic structural view of section I in the Fig. 15 illustrated embodiment. Fig. 18 shows a schematic structural view of the operating part in the Fig. 15 illustrated embodiment.

[0008] In the figures: main body (100); receiving area (101); side wall (102); locking position (1021); release position (1022); separating plate (1023); actuating mechanism (200); connecting part (201); extension end (2011); sliding groove (2012); movement groove (2013); stop boss (2014); handle (202); connecting plate (2021); center hole (2022); winding and unwinding mechanism (300); center axis (301); rotating drum (302); ratchet (303); wheel tooth (3031); axle bushing (304); lever piece (400); pressing end (401); pressing lever (4011); sliding rail (4012); spring (4013); actuating end (402); locking piece (403); positioning part (4031); elastic non-return pawl (404); curved section (4041); re-bend section (4042); torsion spring (405); pin shaft (406); rotary part (407); keyway hole (408); uppermost end point (4081); lowermost end point (4082); webbing (500); operating part (600); pivot bearing (A). DETAILED DESCRIPTION

[0009] As in the Fig. 1 to 3, the invention offers a foldable anti-block ratchet tensioning device, comprising a base body 100, wherein the base body 100 has a receiving area 101 for receiving the belt webbing 500, wherein the receiving area 101 is arranged with a winding and unwinding mechanism 300, the winding and unwinding mechanism 300 comprises a ratchet wheel 303 with wheel teeth 3031, the receiving area 101 is also arranged with an actuating mechanism 200, so that the winding and unwinding mechanism 300 can be selectively locked or unlocked via the actuating mechanism 200, wherein the actuating mechanism 200 is rotatably connected to a lever piece 400, the lever piece 400 has two opposite ends, and are each set as a pressing end 401 and an actuating end 402, the pressing end 401 and the actuating end 402 form with the pivot point of the Lever piece 400 as a support point a power-saving lever,wherein the distance from the pressing end 401 to the support point is greater than the distance from the actuating end 402 to the support point in order to allow the user to operate it easily.

[0010] Furthermore, an elastic non-return pawl 404 is arranged on the actuating end 402, which lies within the rotation radius of the ratchet 303 to prevent reverse rotation of the ratchet 303. When the pressing end 401 is actuated, the actuating end 402 lifts, while the elastic non-return pawl 404 lifts together with the actuating end 402, and at this moment, both the actuating end 402 and the elastic non-return pawl 404 are positioned outside the rotation radius of the ratchet 303.

[0011] As in the Fig. 3 and Fig. As shown in Figure 4, the winding and unwinding mechanism 300 further includes a central axis 301 and a rotating drum 302 for winding the webbing 500. It is worth mentioning that the winding and unwinding mechanism 300 is arranged with a coil spring (not shown) that enables automatic winding and unwinding. Since the above-mentioned technology is well known, it will not be discussed in detail. It should also be noted that the receiving area 101 has sufficient space, and the central axis 301 is arranged in a suitable position to ensure reliable winding and unwinding of the webbing 500.

[0012] The central axis 301 penetrates the receiving area 101, wherein the rotating drum 302 is encased outside the central axis 301 and is rotatably connected to the central axis 301, the ratchet 303 is encased outside the rotating drum 302 and is fixedly connected to the rotating drum 302 to ensure that the ratchet 303 and the rotating drum 302 of the belt webbing 500 rotate synchronously; wherein an axle bushing 304 is embedded between the central axis 301 and the base body 100, and at least a part of the axle bushing 304 is positioned in the receiving area 101.

[0013] Wherein the axle bushing 304 and the components encased on the axle bushing 304 are stationary relative to the central axis 301 and the part of the axle bushing 304 lying outside the receiving area 101 has an enlarged radius, whereby the axial relative movement of the components mounted on the axle bushing 304 is restricted.

[0014] Furthermore, a bearing is arranged between the axle bushing 304, wherein the bearing can assume a deep groove ball bearing or a cylindrical roller bearing, etc., preferably a deep groove ball bearing is assumed, wherein the bearing and the component encased on the bearing can rotate relative to the central shaft 301.

[0015] As in the Fig. 5 and Fig. 6, the actuating mechanism 200 comprises a connecting part 201 and a handle 202, wherein the connecting part 201 is encased outside the axle bushing 304 and is rotatably connected to the axle bushing 304, wherein the connecting part 201 has an extension end 2011 facing away from the winding and unwinding mechanism 300, the handle 202 is arranged on the extension end 2011, and the lever piece 400 is rotatably connected to the extension end 2011, wherein the actuating end 402 is arranged in the direction of the winding and unwinding mechanism 300, a pin shaft 406 is arranged centrally on the extension end 2011, the lever piece 400 is rotatably connected to the extension end 2011 by the pin shaft 406, and a torsion spring 405 is mounted on the pin shaft 406, and under normal conditions the Torsion spring 405 is in a natural state, forcing the handle 202 to move into a positionwhich is slightly higher than the extension end 2011, so that the user can comfortably press the handle 202, and the torsion spring 405 also forces the actuating end 402 to resist the outer contour of the side wall 102. When pressing the pressing end 401, the torsion spring 405 is in a working state, stores elastic potential energy, generates a restoring moment, tends to return to the natural state, and once the pressing end 401 is no longer loaded, the torsion spring 405 returns to the natural state.

[0016] Furthermore, the actuating end 402 is further arranged with a locking piece 403, the elastic non-return pawl 404 is fixedly mounted on the locking piece 403 and extends in the direction of the ratchet 303, on the other hand, the receiving area 101 has a side wall 102, the outer contour of the side wall 102 is arranged with a locking position 1021 and a release position 1022 coordinated with the locking piece 403, between the locking position 1021 and the release position 1022 a separating blade 1023 is arranged, and the separating blade 1023 is a protruding block, and the separating blade 1023 is used to separate the locking position 1021 from the release position 1022.

[0017] Wherein the locking position 1021 and release position 1022 are at a distance from the winding and unwinding mechanism 300, and the distance of the release position 1022 from the winding and unwinding mechanism 300 is greater than the distance of the locking position 1021 from the winding and unwinding mechanism 300, in other words, the locking position 1021 is close to the winding and unwinding mechanism 300 and is within the rotation radius of the ratchet 303, while the release position 1022 is far from the winding and unwinding mechanism 300 and is outside the rotation radius of the ratchet 303.

[0018] As in the Fig. 7 and Fig. As shown in Figure 8, a positioning part 4031 is arranged on the locking piece 403. The positioning part 4031 can be selectively placed in the locking position 1021 or the release position 1022, and the locking element 403 and elastic non-return pawl 404 are relatively fixed in position. The distance between the locking piece 403 and the elastic non-return pawl 404 corresponds to the distance between the adjacent wheel tooth 3031 on the ratchet 303.

[0019] That is, when the positioning member 4031 is placed in the locking position 1021, the elastic non-return pawl 404 abuts against the gear 3031, and when the positioning member 4031 is placed in the release position 1022, the elastic non-return pawl 404 abuts against the adjacent gear tooth 3031, so that regardless of whether the locking piece 403 is placed in the locking position 1021 or the release position 1022, the elastic non-return pawl 404 resists the gear 3031.

[0020] Furthermore, as in Fig. As shown in Figure 2, when the positioning member 4031 is positioned at the locking position 1021, the locking piece 403 is within the rotation radius of the ratchet 303 and is stuck between the adjacent two gears 3031. At the same time, the torque of the ratchet 303 is transmitted to the locking piece 403 through the gear tooth 3031, and transmitted through the locking piece 403 to the separating plate 1023, thereby locking the gear tooth 3031 and restricting the clockwise rotation of the ratchet 303. At the same time, the elastic anti-return pawl 404 resists the gear tooth 3031, and the ratchet 303 is prevented from rotating counterclockwise, thereby locking the winding and unwinding mechanism.

[0021] When the pressing end 401 is pressed, the locking piece 403 is positioned outside the rotation radius of the ratchet 303, and the actuating mechanism 200 is simultaneously switched clockwise so that the locking piece 403 rotates to the release position 1022, which is far away from the winding and unwinding mechanism 300. At this moment, the locking piece 403 is outside the rotation radius of the ratchet 303, the elastic non-return pawl 404 still resists the gear 3031, the ratchet 303 can rotate clockwise but not counterclockwise when the pressing end 401 is pressed, and the actuating mechanism 200 is rotated counterclockwise, so that the locking piece 403 and the elastic non-return pawl 404 are far away from the ratchet 303, whereby the ratchet 303 can rotate clockwise and counterclockwise at this moment.

[0022] In particular, as in the Fig. As shown in Figures 7-10, the rotation radius of the ratchet 303 is defined as the area between the tip circle and the root circle radius. The resilient non-return pawl 404 has an arc portion 4041 and a bend-back portion 4042. The arc portion 4041 has a larger radius of curvature, and the arc portion 4041 therefore exhibits greater elastic deformation. When the ratchet rotates clockwise, the arc portion 4041 deforms radially outward, and the radius of curvature increases, allowing the gear teeth 3031 to slide through and push the resilient non-return pawl 404 away.

[0023] The bend-back portion 4042 has a smaller radius of curvature, and therefore the bend-back portion 4042 has little elastic deformation and has high rigidity.When rotating counterclockwise, the back bend portion 4042 resists the gear tooth 3031 because the contact surface of the gear tooth 3031 and the back bend portion 4042 is gradually far away from the tooth root, thereby extruding the back bend portion 4042, and then causing the smaller elastic deformation of the back bend portion 4042, at the same time, the arc portion 4041 deforms radially inward, while extruding to a certain extent, the back bend portion 4042 and the arc portion 4041 have a large elastic restoring force, thereby resisting the gear tooth 3031 to prevent the ratchet 303 and the winding and unwinding mechanism 300 from rotating backward, so as to ensure that the winding and unwinding mechanism 300 can only rotate clockwise in the operative state.

[0024] Furthermore, in practical operation, the pressing end 401 is pressed and the central axis 301 is taken as the rotation center, the operating mechanism 200 is rotated counterclockwise, causing the locking piece 403 to rotate at the extreme left end of the locking position 1021 and resist the locking position 1021. At the same time, the locking piece 403 is clamped at the lowest point of the wheel tooth 3031, the elastic non-return pawl 404 is tensioned and no longer loaded, the pressing end 401 is pressed and the central axis 301 is taken as the rotation center, and the operating mechanism 200 is rotated clockwise, so that the elastic non-return pawl 404 can easily skip the wheel tooth 3031 and therefore return to the initial position of the locking position 1021, and the webbing 500 tends to retract in this process due to the action of the coil spring.but the retraction device limits the retraction of the webbing 500, and when the actuating mechanism 200 is rotated clockwise, the webbing 500 can be tightened.

[0025] The pressing end 401 is pressed and then the operating mechanism 200 is further rotated counterclockwise so that the locking piece 403 sticks to the release position 1022, at the same time the webbing 500 returns from the tensioned state to the relaxed state, presses the pressing end 401 again to make the locking piece 403 and the elastic anti-return pawl 404 tensioned and is outside the rotation radius of the ratchet 303, under the action of the coil spring, the webbing 500 is smoothly retracted, since the present invention also discloses a safety device so that the device is not damaged due to excessive retraction speed.

[0026] The action of the elastic non-return pawl 404 is explained in more detail. When the locking piece 403 is positioned at the release position 1022, only the elastic non-return pawl 404 is within the rotation radius of the ratchet 303. When the webbing 500 is pulled outward, the wheel tooth 3031 can easily overcome the blockage of the arcuate section 4041, thereby easily pulling out the webbing 500. When the webbing 500 is stopped for pulling out, the ratchet 303 rotates counterclockwise under the action of the coil spring. At this moment, the surface of the wheel tooth touches and the recurving section 4042 is compressed. Since the recurving section 4042 generates elastic deformation and stores elastic potential energy, the recovery moment during the clockwise rotation of the recurving section 4042 is balanced with the restoring moment during the counterclockwise rotation of the coil spring. that the wheel tooth 3031 does not turn back.

[0027] In other possible embodiments of the elastic non-return pawl 404, as shown in FIGS. 11 to 13, the elastic non-return pawl 404 may also have a straight louver shape, and the elastic non-return pawl 404 in the straight louver shape allows the gear tooth 3031 to slide smoothly through the elastic non-return pawl 404 when the ratchet 303 rotates clockwise. However, due to the low rebound force of the elastic non-return pawl 404 in the straight louver shape, the elastic non-return pawl 404 in the straight louver shape is more suitable for applications with lower load requirements.

[0028] In other possible embodiments of the elastic non-return pawl 404 (not shown in the figure), the elastic non-return pawl 404 may also take the shape of the outer contour of the wheel tooth 3031, wherein the elastic non-return pawl 404 is relatively parallel to the wheel tooth 3031. In particular, the straight blade part, which is parallel to the straight part of the gear tooth 3031, is separated from the gear 3031 by a small distance, and the concave arc part, which is parallel to the curved arc part of the gear tooth 3031, is separated from the gear tooth 3031 by a smaller distance. When the ratchet 303 rotates counterclockwise, the elastic non-return pawl 404 generates elastic deformation, and because the contours are approximately the same, the contact area between the elastic non-return pawl 404 and the gear tooth 3031 is larger, thereby allowing a larger torque.and because the elastic non-return pawl 404 is more difficult to deform when the winding and unwinding mechanism 300 is not pulled by external force, the non-return effect of the ratchet 303 is more significant, and when the webbing 500 is pulled by external force, the ratchet 303 has a tendency to rotate clockwise, so that the elastic non-return pawl 404 and the wheel tooth 3031 are relatively easily isolated, and then the torque of the elastic non-return pawl 404 is easily destroyed, so that the wheel tooth 3031 can slide smoothly through the elastic non-return pawl 404 and cause the winding and unwinding mechanism 300 to rotate clockwise.

[0029] Referring to Figures 11 to 14, the present invention also provides an anti-lock ratchet tensioning device comprising a base 100, the base 100 is arranged with a winding and unwinding mechanism 300, the winding and unwinding mechanism 300 includes a ratchet 303 with gear teeth 3031, the base 100 is also arranged with an actuating mechanism 200, by the actuating mechanism 200, the winding and unwinding mechanism can be selectively locked or unlocked, the actuating mechanism 200 is rotatably connected to a lever piece 400, and the lever piece 400 has two opposite ends, and are respectively arranged as a pressing end 401 and an actuating end 402, the actuating end 402 is arranged with an elastic anti-kickback pawl 404 which is positioned in the rotation radius of the ratchet 303 to prevent the reverse rotation of the ratchet 303.

[0030] In the present embodiment, the operating mechanism 200 is arranged with a support piece, the lever piece 400 is arranged with a moving range, and the support piece extends into the moving range; the receiving range of the moving range is larger than the support piece, and the support piece is allowed to move within the moving range; the pressing end 401 and the operating end 402 receive the support piece as a fulcrum and form a lever; when the pressing end 401 is pressed, the operating end 402 is clamped, and the elastic anti-return pawl 404 is located outside the rotation radius of the ratchet 303.

[0031] The support piece can support the lever piece 400 so that when the pressing end 401 is pressed, the lever piece 400 can take the support piece as a pivot point and rotate so that the actuating mechanism 402 is tensioned, thereby tensioning the elastic non-return pawl 404.

[0032] By placing the support piece within the movement range and allowing movement, relative movement can occur between the support piece and the lever 400. Therefore, when the elastic anti-kickback pawl 404 resists the ratchet 303 for control when the ratchet 303 rotates clockwise, the rotating gear tooth 3031 can push the elastic anti-kickback pawl 404 away. In this way, the friction and resistance between the elastic anti-kickback pawl 404 and the gear tooth 3031 can be reduced, allowing the gear tooth 3031 to slide more smoothly through the elastic anti-kickback pawl 404, avoiding jamming. Therefore, when the webbing 500 is pulled out of the winding and unwinding mechanism 300, it is smoother and more labor-saving.

[0033] In one embodiment, the support piece is a pin shaft 406, and the pin shaft 406 is alternated at the extension end 2011 and positioned between the winding and unwinding mechanism 300 and the handle 202. The lever piece 400 is arranged with a pivoting part 407, and the pivoting part 407 is positioned between the pressing end 401 and the actuating end 402; the movement area is arranged at the pivoting part 407. The movement area is a grooved hole 408, and the grooved hole 408 has an uppermost end point 4081 and a lowermost end point 4082; the pin shaft 406 can be moved between the uppermost end point 4081 and the lowermost end point 4082. When the pin shaft 406 is close to the lowermost end point 4082, the elastic non-return pawl 404 moves in a direction far from the wheel tooth 3031.The pin shaft 406 is also externally covered with a torsion spring 405, and the torsion spring 405 extends to the uplift direction of the actuating end 402.

[0034] In the above embodiment, the pin shaft 406 can reciprocate between the uppermost end point 4081 and the lowermost end point 4082. The elastic anti-return pawl 404 has a straight blade shape and is integrally formed with the locking piece 403. The lever piece 400 is capable of rotating outside the pin shaft 406, so that when the pressing end 401 is pressed, the actuating mechanism 402 can be clamped with the locking piece 403 and the elastic anti-return pawl 404. Furthermore, by arranging the torsion spring 405, when the external force pressing the pressing end 401 is withdrawn, the torsion spring 405 can utilize the elastic force to cause the lever piece 400 to rotate and reset.

[0035] In the above embodiment, when the elastic non-return pawl 404 of the ratchet 303 resists kickback when the ratchet 303 rotates clockwise and because the pin shaft 406 can be moved back and forth between the uppermost end point 4081 and the lowermost end point 4082, the rotating gear tooth 3031 can push the elastic non-return pawl 404 while the lever piece 400 moves upward due to the thrust, and the pin shaft 406 moves toward the lowermost end point 4082 of the groove hole 408. When the gear tooth 3031 slides past the elastic non-return pawl 404, the torsion spring 405 then uses the tensile force to move the lever piece 400 downward and reset, and the pin shaft 406 returns again to the uppermost end point 4081.Therefore, when the ratchet 303 continuously rotates clockwise, the lever piece 400 bounces up and down with the rotation of the ratchet 303, so that the frictional force and resistance between the elastic non-return pawl 404 and the gear tooth 3031 can be reduced, allowing the gear tooth 3031 to slide more smoothly through the elastic non-return pawl 404, and preventing jamming. Therefore, when the webbing 500 is pulled out of the winding and unwinding mechanism 300, it is smoother and more labor-saving.

[0036] In other embodiments of the support piece (not shown in the figure), the support piece may also be a cylindrical hub, and the hub is inserted into the keyway hole 408 and can be moved within the keyway hole 408. And the lever piece 400 can be rotated along the hub. Of course, the support piece is not limited to the shape of the pin shaft 406 or the hub, but can also be the shape of the pin, key, etc., suitable for the rotation and movement of the lever piece 400.

[0037] Of course, the movement range is not limited to through-groove variants, and in other embodiments of the movement range (not shown in the figure), the movement range can also be opened according to the shape of various support pieces with grooves, and the shape is opened according to the outer contour of the support pieces.

[0038] For example, if the support piece is a cylindrical hub, the movable portion may be arranged in a strip-shaped groove, and the hub may be rotated and moved in the strip-shaped groove. If the support piece is a key, the movable portion may correspond to a keyway, and if the support piece is a key, the key may be arranged to be rotatably connected to the actuating mechanism 200, thereby ensuring rotation between the lever piece 400 and the key.

[0039] Referring to Fig. 3 and Fig. 5, the present invention also provides an anti-blocking ratchet tensioning device comprising a base body 100, wherein the base body 100 has a receiving area 101 for receiving a belt strap 500. A winding and unwinding mechanism 300 is arranged in the receiving area 101, which comprises a ratchet 303 with wheel teeth 3031.

[0040] As in Fig. 3 and Fig. 5, the receiving area 101 further comprises an actuating mechanism 200 by which the winding and unwinding mechanism 300 can be selectively locked or unlocked. According to Fig. 15 and Fig. 18, an actuating part 400 is arranged on the actuating mechanism 200, which comprises a pressing end 401 and an actuating end 402.

[0041] As in Fig. 15 and Fig. 18, the actuating end 402 includes an elastic anti-return pawl 404 positioned within the rotation radius of the ratchet 303 to prevent reverse rotation of the ratchet 303. The elastic anti-return pawl 404 is technically separate from the pressing end 401, is rotatably connected to the actuating mechanism 200, and is in contact with the wheel teeth 3031 of the ratchet 303. A torsion spring 405 is arranged on the elastic anti-return pawl 404, the end of which is remote from the pivot bearing A and is connected to the actuating mechanism 200. The torsion spring 405 exerts a continuous restoring force on the elastic anti-return pawl 404 to maintain a constant deflection tendency toward the wheel teeth. When the ratchet 303 is rotated clockwise, the wheel teeth 3031 press the elastic non-return pawl 404 to perform an elastic evasive movement.After the wheel teeth 3031 have passed over, the torsion spring 405 immediately returns the elastic anti-kickback pawl 404 to the toothed position, thus implementing the anti-kickback function. This design ensures both the reliability of the unidirectional rotation of the ratchet 303 and a significant reduction in the risk of jamming due to elastic deflection.

[0042] Furthermore, as in Fig. 15, Fig. 16 and Fig. As shown in Figure 18, the actuating end 402 further includes a locking piece 403 disposed on the pressing end 401 and slidably connected to the actuating mechanism 200. A positioning part 4031 is formed on the locking piece 403, which can be selectively placed in a locking position 1021 or a release position 1022. The locking piece 403 and the elastic anti-return pawl 404 are technically separate, whereby they act independently of each other.

[0043] As in Fig. 5, the receiving area 101 has a side wall 102, the outer contour of which has a locking position 1021 and a release position 1022 that interact with the locking piece 403. Between the locking position 1021 and the release position 1022, a separating lamella 1023 is arranged as a raised block, separating both positions.

[0044] When the pressing end 401 is pressed, the locking piece 403 is outside the rotation radius of the ratchet 303. At the same time, a clockwise pivoting movement of the actuating mechanism 200 causes the locking piece 403 and the elastic anti-return pawl 404 to pivot to the release position 1022 facing away from the winding and unwinding mechanism 300. In this state, the locking piece 403 is outside the rotation radius of the ratchet 303, the elastic anti-return pawl 404 remains in contact with the wheel teeth 3031, so that the ratchet 303 can be rotated clockwise, but is blocked counterclockwise. In this operating state, the operator can pull the webbing 500 by rotating the ratchet 303 clockwise.By technically arranging the locking piece 403 and the elastic non-return pawl 404 separately, the latter can perform a slight deflection or evasive movement when overrunning the wheel teeth 3031 by means of the elasticity of the torsion spring 405. This primarily reduces the frictional forces and resistance between the elastic non-return pawl 404 and the wheel teeth 3031, and also enables smooth overrun of the wheel teeth 3031, ultimately avoiding rigid collisions and stagnation phenomena, thereby significantly increasing operating smoothness and achieving a power-saving effect.

[0045] As in Fig. 15, Fig. 16 and Fig. As shown in Figure 17, the actuating mechanism 200 comprises a connecting part 201 and a handle 202. The pressing end 401 is arranged on the handle 202. The connecting part 201 has an extension end 2011 facing away from the winding and unwinding mechanism 300. The handle 202 is mounted on the extension end 2011. Both side surfaces of the extension end 2011 have a sliding groove 2012 and a movement groove 2013 therethrough, with the movement groove 2013 being arranged behind the sliding groove 2012. An inner wall of the movement groove 2013 carries a stop boss 2014. The positioning part 4031 of the locking piece 403 is slidably arranged in the sliding groove 2012. When the pressing end 401 is pressed, the positioning part 4031 moves transversely within the sliding groove 2012, usually perpendicular to the axis of the ratchet 303.This displacement moves the locking piece 403 as a whole, selectively entering or leaving the rotation radius of the ratchet 303, thereby locking or unlocking the ratchet 303. The elastic anti-return pawl 404 has a pivot bearing A. The pivot bearing A of the elastic anti-return pawl 404 is rotatably arranged in the movement groove 2013 and abuts the stop boss 2014. Upon clockwise rotation of the ratchet 303, the gear teeth 3031 slide along the sliding surface of the elastic anti-return pawl 404, exerting a radial thrust force. Under this force, the elastic anti-return pawl 404 deflects elastically about the pivot point on the stop boss 2014, with the movement groove 2013 providing the necessary movement space. After the wheel teeth 3031 have passed over, the torsion spring 405 automatically returns the elastic non-return pawl 404 to the starting position for contact with subsequent wheel teeth 3031.

[0046] How Fig. 16 and Fig.As shown in Figure 18, the pressing end 401 comprises a pressing lever 4011. The locking piece 403 is attached to an underside of the pressing lever 4011. A side of the pressing lever 4011 facing away from the winding and unwinding mechanism 300 supports a permanently installed slide rail 4012. On the handle 202, a side facing the slide rail 4012 is provided with a connecting plate 2021. The connecting plate 2021 has a central hole 2022. The slide rail 4012 is arranged to slidably engage the center hole 2022. A spring 4013 is permanently installed between the pressing lever 4011 and the connecting plate 2021. When the operator presses the pressing lever 4011, the slide rail 4012 slides axially along the center hole 2022. This compresses the spring 4013 and synchronously drives the locking piece 403 vertically out of the rotation radius of the ratchet, thereby eliminating the mechanical interference with the ratchet 303.When the operator releases the pressing lever 4011, the spring 4013 relaxes. This pushes the pressing lever 4011 precisely back along the guide of the slide rail 4012 and moves the locking piece 403 back into the rotation radius of the ratchet, restoring the locking function. In summary, the present invention realizes the following technical effects:

[0047] By arranging the elastic non-return pawl 404 and the locking piece 403 at the operating end 402 of the lever piece 400, pressing the lever piece 400 can simultaneously control the elastic non-return pawl 404 and the locking piece 403 to realize functions such as locking, unlocking, or kickback. This makes the tensioner structure simpler and more compact, and operation easier and more user-friendly, effectively reducing manufacturing costs.

[0048] By providing a movement area on the lever piece 400, when the elastic anti-kickback pawl 404 resists the ratchet 303 and the ratchet 303 rotates clockwise, the lever piece 400 bounces up and down with the rotation of the ratchet 303, so that the frictional force and resistance between the elastic anti-kickback pawl 404 and the gear tooth 3031 can be reduced, allowing the gear tooth 3031 to slide more smoothly through the elastic anti-kickback pawl 404, avoiding jamming. Therefore, when the webbing 500 is pulled out of the winding and unwinding mechanism 300, it is smoother and more labor-saving.

[0049] By technically arranging the locking piece 403 and the elastic non-return pawl 404 separately, the latter (elastic non-return pawl) can perform a slight deflection or evasive movement when overrunning the wheel teeth 3031 by means of the elasticity of the torsion spring 405. This primarily reduces the frictional forces and resistance between the elastic non-return pawl 404 and the wheel teeth 3031, and also enables smooth overrun of the wheel teeth 3031, ultimately avoiding rigid collisions and stagnation phenomena, thereby significantly increasing operating smoothness and realizing a power-saving effect.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Various changes and modifications are possible for those skilled in the art. Any changes, equivalents, improvements, etc., made within the spirit and principles of the present invention are to be included within the scope of the present invention. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 102007020856A1

[0003]

Claims

[1] Anti-blocking ratchet tensioning device, comprising: basic body; and Winding and unwinding mechanism, rotatably arranged on the base body, wherein the winding and unwinding mechanism comprises a ratchet with wheel teeth; and Actuating mechanism with an actuating part that is operatively connected to the ratchet and controls its rotation and locking; and The operating part includes: Elastic non-return pawl, elastically adjustable, mounted on the operating mechanism, at least one portion of which is located within the rotation radius of the ratchet; and The elastic non-return pawl is structured to: When the ratchet rotates counterclockwise, blocking the passage of the wheel teeth and thereby locking the ratchet; and When the ratchet is turned clockwise, the wheel teeth trigger an elastic evasive movement that allows the wheel teeth to slide. [2] Anti-block ratchet tensioning device according to claim 1, characterized by that the actuating mechanism has a connecting part and a handle, wherein the connecting part is rotatably connected to the winding and unwinding mechanism. [3] Anti-block ratchet tensioning device according to claim 2, characterized by that the connecting part has an extension end facing away from the winding and unwinding mechanism, the handle is mounted on the extension end, and both side surfaces of the extension end have a sliding groove and a movement groove throughout, wherein the movement groove is arranged behind the sliding groove and an inner wall of the movement groove carries a stop boss. [4] Anti-block ratchet tensioning device according to claim 3, characterized byin that the actuating part further comprises a locking piece having a positioning part, wherein the positioning part is slidably arranged in the sliding groove; and wherein, upon pressing the locking piece, the positioning part is transversely displaceable within the sliding groove, this displacement causing an overall movement of the locking piece to selectively enter or exit the rotation radius of the ratchet, thereby locking or unlocking the ratchet. [5] Anti-block ratchet tensioning device according to claim 3, characterized by that the elastic non-return pawl has a pivot bearing which is rotatably arranged in the movement groove and bears against the stop boss; and wherein, when force is exerted by the wheel teeth on the elastic non-return pawl, the latter deflects elastically around the pivot point on the stop boss in the movement groove in order to enable a slight evasive movement. [6] Anti-block ratchet tensioning device according to claim 1, characterized by that a torsion spring is arranged on the elastic non-return pawl, the end of which is remote from the pivot bearing and is connected to the actuating mechanism, the torsion spring exerting a continuous restoring force on the elastic non-return pawl in order to maintain a deflection tendency which is always directed towards the wheel tooth. [7] Anti-block ratchet tensioning device according to claim 4, characterized by that the actuating part further comprises a pressing end which has a pressing lever, wherein the locking piece is fastened to an underside of the pressing lever, and a side of the pressing lever facing away from the winding and unwinding mechanism carries a slide rail. [8] Anti-block ratchet tensioning device according to claim 7, characterized bythat on the handle, a side facing the slide rail has a connecting plate fixedly arranged, the connecting plate has a central hole, the slide rail engages displaceably in the hole, and a spring is fixedly arranged between the pressing lever and the connecting plate.

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