A tensioner for automatically recovering a webbing

Abstract

This utility model provides an automatic webbing tensioner, including a base, a handle, and a ratchet tooth bushing, all three being coaxially mounted. An upper baffle is constrained in the handle track by a first compression spring, and a lower baffle is constrained in the base track by a second compression spring. The webbing is wound around the ratchet tooth bushing, and a coil spring located on one side of the shaft provides the power for automatic webbing retraction. When the handle is lifted, the upper baffle drives the ratchet teeth to rotate and tighten the webbing. When the handle is released or pressed down, the lower baffle blocks the ratchet rotation, preventing the webbing from loosening. When the handle is pressed down to the closed state, the flange on the base ejects the upper baffle, and the upper contour of the handle ejects the lower baffle, allowing the ratchet to rotate freely under the action of the coil spring, automatically retracting the webbing.

Description

Technical Field

[0001] This utility model belongs to the field of tensioners, specifically to the field of tensioners for automatic retraction of webbing. Background Technology

[0002] Patent CN222573991U, published on March 7, 2025, discloses an automatic webbing tensioner, which suffers from complex structure and unclear usage logic. This utility model features a simple structure; simply pressing the handle down to the closed position allows the ratchet to rotate freely, automatically retrieving the webbing under the action of a coil spring. Furthermore, it incorporates safety measures to prevent accidental loosening of the webbing due to misoperation. Utility Model Content

[0003] This utility model provides an automatic webbing tensioner, including a base, a handle, and a ratchet tooth bushing, all three being coaxially mounted. An upper baffle is constrained in the handle track, with pressure from a first compression spring pressing against the ratchet tooth edge. A lower baffle is constrained in the base track, with pressure from a second compression spring pressing against the ratchet tooth edge. The webbing is wound around the ratchet tooth bushing, and a coil spring located on one side of the shaft provides the power for automatic webbing recovery. When the handle is lifted, the upper baffle drives the ratchet tooth to rotate and tighten the webbing. When the handle is released or pressed down, the lower baffle blocks the ratchet rotation, preventing the webbing from loosening. When the handle is pressed down to its lowest position, the tensioner is in the closed state. The state before the handle is pressed down to its lowest position is the working state of the tensioner. When the handle is pressed down to the closed state, the flange on the base pops out the upper baffle, and the upper contour of the handle pops out the lower baffle. At this time, the ratchet is no longer blocked by the upper and lower baffles and can rotate freely, automatically recovering the webbing under the action of the coil spring.

[0004] To prevent the handle from accidentally entering the closed state and causing the webbing to loosen unexpectedly, a locking plate is installed in the base hole. One end of the locking plate is a button end, and the other end is a locking end. The locking end of the locking plate is pressed against the outer edge of the handle by a spring. A handle protrusion is added at a specific position on the outer edge of the handle. When the handle is pressed down to the critical point between the working state and the closed state, the locking end of the locking plate presses against the handle protrusion, limiting the handle from being pressed down further. When the button end of the locking plate is pressed down, the locking end of the locking plate lifts up and no longer presses against the handle protrusion. At this time, the handle can be pressed down further to the closed state, so that the ratchet rotation is not blocked by the upper and lower stops, and the webbing is automatically retracted under the action of the coil spring.

[0005] This utility model overcomes the problems of complex structure and unclear usage logic in existing technologies. It is simple and easy to use, and the further improved locking scheme prevents the webbing from accidentally coming loose due to misoperation, making it more practical. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0007] Figure 1 An exploded view of an automatic retraction webbing tensioner is shown.

[0008] Figure 2 This diagram illustrates a cross-sectional view of an automatic retraction webbing tensioner handle in the closed position.

[0009] Figure 3 This diagram illustrates a cross-sectional view of an automatic retraction webbing tensioner handle in its open state.

[0010] Figure 4 The diagram shows a cross-sectional view of an automatic retractable webbing tensioner handle locked in place by a locking plate and unable to be pressed down.

[0011] The attached figures are labeled as follows:

[0012] 1. Base; 2. Handle; 3. Ratchet tooth bushing; 4. Locking plate; 5. Upper stop plate; 6. Lower stop plate; 7. Shaft; 8. Coil spring; 9. Spring; 10. First compression spring; 11. Second compression spring; 12. Webbing; 13. Flange on the base; 14. Flange on the handle; 15. Handle protrusion; 16. Upper contour of the handle; 17. Handle track; 18. Base track; 19. Base hole. Detailed Implementation

[0013] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present application will become clearer and more apparent.

[0014] Implementation plan: as attached Figure 1 As shown, the automatic retractable webbing tensioner consists of three parts: a base 1, a handle 2, and a ratchet gear sleeve 3. These three parts are coaxially mounted and fixed by rivets 7. The handle 2 is located within the... Figure 1 The diagram shows an elongated hole, referred to as the handle track 17. The upper stop plate 5 is constrained within the handle track 17, and pressure is provided by the first compression spring 10 to press against the ratchet teeth. When the upper stop plate 5 is lifted by the ratchet teeth or the flange 12 on the base, it will move accordingly within the handle track 17. (The last sentence appears to be incomplete and possibly refers to a different part of the diagram.) Figure 1An elongated hole, referred to as the base track 18, is provided at the indicated location. The lower stop plate 6 is constrained within the base track 18, and pressure is provided by the second compression spring 11 to press against the edge of the ratchet teeth. When the lower stop plate 6 is lifted by the ratchet teeth or the upper contour 16 of the handle, it will move accordingly within the base track 18. The webbing 12 is wound around the ratchet tooth bushing 3, and a coil spring 8 located on one side of the shaft provides the power for automatic retraction of the webbing 12. When the handle 2 is pressed down to the lowest position, the tensioner is in the closed state. The state before the handle 2 is pressed into the lowest position is the working state of the tensioner. When tightening the webbing 12, the handle 2 should not be pressed down to the closed state, otherwise the webbing 12 will loosen. When tightening the webbing 12 is required during operation, pull up the handle 2. The upper stop 5 rotates the ratchet teeth as the handle 2 is raised, tightening the webbing 12. At this time, the lower stop 6 is ejected by the ratchet teeth, not affecting the ratchet rotation. When pressing down the handle 2, the lower stop 6 blocks the ratchet rotation, preventing the webbing 12 from loosening. The upper stop 5 is then ejected by the ratchet teeth and moves with the handle 2, embedding itself into a new position on the ratchet teeth. Repeatedly lifting and pressing the handle 2 achieves continuous tightening of the webbing 12. This is the standard tightening operation of the ratchet tensioner and will not be further explained in detail. When the handle 2 is stationary in the working state, the lower stop 6 is embedded in the ratchet teeth, preventing the ratchet from rotating and preventing the webbing 12 from loosening. At this time, the upper stop 5 is embedded in the corresponding ratchet teeth along with the handle 2. When it is necessary to loosen the webbing 12 or automatically retract the webbing 12, press the handle 2 down to the closed state, such as... Figure 2 As shown, at this time, the flange 13 on the base pops up the upper stop plate 5, and the upper contour 16 of the handle pops up the lower stop plate 6, so that the ratchet rotates freely under the drive of the coil spring 8, realizing the loosening and automatic retraction of the webbing 12.

[0015] To prevent the handle 2 from being pressed into the closed position due to accidental operation, which could cause the webbing 12 to come loose unexpectedly, the base 1 is as follows: Figure 1 A locking plate 4 is installed in the base hole 19 at the indicated position and can be fixed by rivets. One end of the locking plate 4 is a button end and the other end is a locking end.

[0016] In the working state, the locking end of the locking plate 4 is pressed against the edge of the handle 2 by the spring 9, and will not touch the ratchet teeth. When the handle 2 is pressed down and rotated to the critical point between the working state and the closed state, as... Figure 3 , Figure 4 As shown, the locking end of the locking plate 4 abuts against the handle protrusion 15, restricting the handle 2 from continuing to rotate and press down.

[0017] At this time, the button end of the locking plate 4 can be pressed, the locking end of the locking plate 4 will be lifted and will no longer press against the handle protrusion 15. The handle 2 can continue to be pressed down to the closed state, so that the ratchet can rotate freely under the drive of the coil spring 8 and automatically retract the webbing 12.

[0018] When handle 2 is lifted from the closed state, the edge of handle 2 automatically pops up the locking plate, and it can return to the working state without pressing the button end of the locking plate 4.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

[0020] This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An automatic retraction webbing tensioner, comprising a base (1), a handle (2), and a ratchet tooth bushing (3), all three being coaxially mounted. An upper baffle (5) is constrained in a handle track (17), with pressure provided by a first compression spring (10) against the edge of the ratchet tooth. A lower baffle (6) is constrained in a base track (18), with pressure provided by a second compression spring (11) against the edge of the ratchet tooth. The webbing (12) is wound around the ratchet tooth bushing (3). A coil spring (8) located on one side of the shaft provides the power for automatically retracting the webbing (12). When the handle (2) is lifted, the upper baffle (5) drives the ratchet tooth to rotate and tighten the webbing (12). When the handle (2) is released or pressed down, the lower baffle (6) blocks the ratchet from rotating, preventing the webbing (12) from loosening. The device is characterized in that... When the handle (2) is pressed down to the closed state, the flange (13) on the base pops out the upper baffle (5), and the upper contour (16) of the handle pops out the lower baffle (6).

2. The tensioner for automatically retracting webbing as described in claim 1, characterized in that, Install a locking plate (4) in the base hole (19). One end of the locking plate (4) is the button end, and the other end is the locking end. In the working state, the locking end of the locking plate (4) is pressed against the edge of the handle (2) by the spring (9). When the handle (2) is pressed down and rotated to the critical point between the working state and the closed state, the locking end of the locking plate (4) presses against the handle protrusion (15) to restrict the handle (2) from continuing to rotate and press down. When the button end of the locking plate (4) is pressed down, the locking end of the locking plate (4) is lifted and no longer presses against the handle protrusion (15). The handle (2) can continue to be pressed down to the closed state.

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