Multifunctional bandage tensioner

Abstract

The multifunctional bandage tensioner comprises a base, a winding roller, a locking assembly, a limiting assembly and a handle assembly, the winding roller is elastically and rotationally installed on the base, a bandage body is wound around the winding roller, and the locking assembly is installed on the base and matched with the winding roller; the limiting assembly is installed on the base and matched with the winding roller, and the handle assembly is installed on the base and matched with the winding roller, the locking assembly and the limiting assembly. The device has the beneficial effects that by arranging the limiting assembly, when the take-up speed of the tensioner is too high, the limiting assembly is matched with the winding roller through the handle assembly at the moment, the winding roller stops rotating at the moment, the operation is repeated, the limiting assembly and the winding roller are intermittently matched, the take-up speed of the belt body can be controlled, and the take-up speed of the belt body can be controlled. Therefore, the unordered jumping of the hook body at the end part of the belt body is avoided, and the use safety is improved.

Description

Technical Field

[0001] This application relates to the field of strap tensioning equipment technology, and in particular to a multifunctional strap tensioner. Background Technology

[0002] The main function of a strap tensioner is to secure and protect items by tightening straps. It is commonly used for securing goods during transportation, movement, loading, or warehousing, and features a secure, reliable, lightweight, and easy-to-operate design that prevents slippage once locked. Using a strap tensioner can significantly improve work efficiency and protect objects from damage.

[0003] Existing strap tensioners have the following problem: during strap retraction, the elastic potential energy of the coil spring is used to automatically retract the strap at a high speed. This causes the hook at the strap end to jump erratically, potentially causing accidental injury to the user and posing a safety hazard. Therefore, a multi-functional strap tensioner is proposed to solve the above-mentioned technical problems. Utility Model Content

[0004] One of the objectives of this application is to provide a multifunctional strap tensioner.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a multifunctional strap tensioner, comprising a base, a roller, a locking component, a limiting component, and a handle assembly. The roller is elastically rotatably mounted on the base, and a strap is wound around the outside of the roller. The locking component is mounted on the base and cooperates with the roller. The limiting component is mounted on the base and cooperates with the roller. The handle assembly is mounted on the base and cooperates with the roller, the locking component, and the limiting component. When the strap is pulled, the handle assembly is located in a first position on the base, and the locking component is adapted to release the locking of the roller under the action of the handle assembly. The limiting component abuts against the roller, thereby keeping the stopped roller stationary. When the strap is wound, the limiting component is adapted to intermittently cooperate with the roller under the drive of the handle assembly, thereby adjusting the winding speed of the strap.

[0006] Preferably, the roller includes a central shaft and a pair of ratchet wheels. The central shaft is rotatably mounted in the base, and the ratchet wheels are sleeved and mounted at both ends of the central shaft. The belt is wound around the outside of the central shaft.

[0007] Preferably, the locking assembly includes a lower locking plate, which is elastically slidably mounted on one side of the lower end of the base and engages with the ratchet; the lower locking plate engages with the tooth groove of the ratchet, thereby locking the ratchet in a first direction.

[0008] Preferably, the limiting component includes a front baffle, which is elastically rotatably mounted on the other side of the lower end of the base and engages with the ratchet. The front baffle is adapted to abut against the outside of the ratchet under elastic force so that the roller remains stationary.

[0009] Preferably, the handle assembly includes a handle plate and a limiting structure mounted on the handle plate. The handle plate is rotatably mounted on the base, and the handle plate is adapted to be locked in a first position by the limiting structure. The handle plate is provided with a first protrusion, a second protrusion, and a third protrusion in sequence along the circumferential direction. When the belt is pulled, the first protrusion cooperates with the lower locking plate, thereby causing the lower locking plate to move away from the ratchet. When the belt is wound up, the second protrusion cooperates with the front baffle, thereby causing the front baffle to move away from the ratchet. When the belt is tightened, the handle assembly is located in a second position on the base, at which time the third protrusion cooperates with the front baffle, thereby causing the front baffle to move away from the ratchet.

[0010] Preferably, the limiting structure includes a limiting plate, which is elastically and movably mounted on the handle plate. The upper end of the base is provided with a first groove and a second groove. The first groove is used to form a first position, and the second groove is used to form a second position. When the limiting plate is located in the first groove, the limiting plate is disengaged from the ratchet. When the limiting plate is located in the second groove, the limiting plate is engaged with the tooth groove of the ratchet.

[0011] Preferably, both the handle plate and the base have a "U" shaped structure, the handle plate is rotatably sleeved on the central shaft, and the base covers the outside of the handle plate.

[0012] Preferably, a push button is detachably sleeved at the end of the handle plate, and the end of the handle plate is provided with an elastic protrusion four, and the push button is provided with a groove, the protrusion four being adapted to the groove.

[0013] Preferably, one end of the central shaft extends out of the base and is provided with a slot, and a housing is installed on the side of the base corresponding to one end of the central shaft. A spiral spring is provided inside the housing, and the two ends of the spiral spring are respectively connected to the slot and the inside of the housing.

[0014] Preferably, the radial cross-section of the central shaft is a non-circular structure, and the ratchet is provided with a matching socket hole, thereby realizing the synchronous rotation of the central shaft and the ratchet.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] This invention incorporates a limiting component. When the tensioner retracts too quickly, the handle component engages with the winding roller again, stopping the roller's rotation. This process is repeated intermittently, allowing the limiting component and the winding roller to work together, thus controlling the belt's winding speed. This prevents the hooks at the belt's end from jumping erratically, improving safety during use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the exploded structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the handle plate and base structure of this utility model.

[0020] Figure 4 This is a schematic diagram of the tensioner of this utility model in mode one.

[0021] Figure 5 This is a schematic diagram showing the cooperation relationship between the various components and the ratchet in Mode 1 of this utility model.

[0022] Figure 6 This is a schematic diagram illustrating the working principle of the tensioner of this utility model in Mode 2.

[0023] Figure 7 This is a schematic diagram of the tensioner of this utility model in mode three.

[0024] Figure 8 This is a schematic diagram showing the interaction between the various components and the ratchet in Mode 3 of this utility model.

[0025] Figure 9 This is a schematic diagram illustrating the working principle of Mode 3 of this utility model.

[0026] Figure 10 This is a schematic diagram showing the interaction between the push button and the handle plate of this utility model.

[0027] Figure 11 This is a schematic diagram illustrating the elastic mounting principle of the roller of this utility model.

[0028] Figure 12 This is a schematic diagram of the mating structure between the central shaft and the ratchet of this utility model.

[0029] In the diagram: 1. Base; 2. Roller; 201. Ratchet; 202. Central shaft; 3. Handle assembly; 301. Handle plate; 302. Limiting structure; 4. Belt body; 5. Fixing belt; 6. Hook body; 7. Locking assembly; 701. Lower locking plate; 8. Limiting assembly; 801. Front baffle; 9. Spiral spring; 10. Housing; 11. Front face; 12. Press button; 13. Protrusion 1; 14. Protrusion 2; 15. Protrusion 3; 16. First groove; 17. Second groove; 18. Protrusion 4; 19. Groove; 20. Slotted groove; 21. Flat part; 22. Socket hole. Detailed Implementation

[0030] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0032] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0033] One preferred embodiment of this application, such as Figures 1 to 12 As shown, a multifunctional strap tensioner includes a base 1, a roller 2, a locking component 7, a limiting component 8, and a handle assembly 3. The roller 2 is elastically rotatably mounted on the base 1, and a belt 4 (e.g., a braided belt) is wound around the outside of the roller 2. The locking component 7 and the limiting component 8 are both mounted on the base 1 and cooperate with the roller 2. The handle assembly 3 is mounted on the base 1 and cooperates with the roller 2, the locking component 7, and the limiting component 8.

[0034] It is understandable that the above design allows the tensioner in this application to have three modes:

[0035] Mode 1: When the belt 4 is being pulled in the tensioner, the handle assembly 3 is in the first position of the base 1. The locking assembly 7 releases its lock on the winding roller 2 under the action of the handle assembly 3, while the limiting assembly 8 engages with the winding roller 2. That is, after the belt 4 stops being pulled, the limiting assembly 8 keeps the winding roller 2 stationary, preventing the winding roller 2 from rapidly retracting and resetting the belt 4 under the tensioner's elastic force. This mode is mainly convenient for scenarios where the belt 4 is pulled out of the tensioner, such as... Figure 5 As shown.

[0036] Mode 2: The handle assembly 3 remains in the first position, and the locking assembly 7 and the winding roller 2 are still disengaged. However, the handle assembly 3 can drive the limiting assembly 8, causing the limiting assembly 8 to intermittently engage with the winding roller 2. For example, during the rewinding and recovery of the belt 4, the handle assembly 3 drives the limiting assembly 8 to disengage from the winding roller 2, allowing the winding roller 2 to rewind and recover under its own elastic force. When the speed is too high, the handle assembly 3 re-engages the limiting assembly 8 with the winding roller 2, stopping the roller 2 from rotating. This process repeats, allowing the limiting assembly 8 and the winding roller 2 to engage intermittently, thus controlling the winding speed of the belt 4 and preventing disorderly jumping of the hook 6 at the end of the belt 4, improving safety. This mode is mainly convenient for the rewinding and recovery of the belt 4, such as... Figure 6 As shown.

[0037] Mode 3: This refers to the tensioning scenario of the belt body 4 in a tensioner, where the handle assembly 3 is located in the second position of the base 1. For example, suppose the limiting assembly 8 locks the roller 2 in the first direction (counterclockwise), and then the handle assembly 3 drives the roller 2 to rotate in the second direction (clockwise), thereby achieving the tightening process of the belt body 4. Figure 9 As shown.

[0038] As a further description of the above embodiments: such as Figure 2 and Figure 11 As shown, the roller 2 includes a central shaft 202 and a pair of ratchet wheels 201. The central shaft 202 is elastically rotatably mounted in the base 1, and the ratchet wheels 201 are sleeved and mounted at both ends of the central shaft 202. The belt 4 is wound around the outside of the central shaft 202.

[0039] like Figure 11As shown, the elastic mounting method of the roller 2 is as follows: one end of the central shaft 202 extends out of the base 1 and is provided with a slot 20. A housing 10 is installed on the side of the base 1 corresponding to one end of the central shaft 202. A spiral spring 9 is provided inside the housing 10. The two ends of the spiral spring 9 are connected to the slot 20 and the inside of the housing 10, respectively. It can be understood that when the roller 2 is unwinding (i.e., when the belt 4 is pulled out), the spiral spring 9 generates torque and stores energy under the drive of the central shaft 202; when the belt 4 loses the external force, the spiral spring 9 will release energy, thereby causing the belt 4 to be retracted and reset.

[0040] like Figure 12 As shown, the installation method between the central shaft 202 and the ratchet 201 is as follows: the radial cross-section of the central shaft 202 is a non-circular structure, and the ratchet 201 is provided with a matching socket 22, thereby realizing the synchronous rotation of the central shaft 202 and the ratchet 201. For example, a flat part 21 is provided on the outer side of the central shaft 202 along the axial direction, which is equivalent to "cutting" the outer side of the central shaft 202 along the axial parallel position to form a non-circular structure. Of course, the ratchet 201 is also provided with a matching socket 22. In this way, the two will be limited and rotate synchronously in the axial rotation direction. In the subsequent installation process, it is only necessary to limit the axial direction of the ratchet 201, for example, by using a cotter pin to cooperate with the central shaft 202 to limit the ratchet 201, making disassembly and assembly convenient and quick.

[0041] It should be noted that there are various structural forms for the non-circular structure of the central axis 202 mentioned above, but the preferred form is as follows: Figure 12 The flat section 21 shown is designed so that it can be formed simply by cutting the outer side of the central shaft 202 along the axial direction using a machine tool, making the processing simple and convenient.

[0042] In this embodiment, as Figure 8 As shown, the locking assembly 7 includes a lower locking plate 701, which is elastically slidably mounted on one side of the lower end of the base 1, for example, slidably mounted on the lower left side of the base 1 via a pagoda spring, and the lower locking plate 701 engages with the ratchet 201. For example, when the lower locking plate 701 engages with the toothed groove of the ratchet 201, the ratchet 201 can be locked in the first direction (counterclockwise). That is, the ratchet 201 can rotate clockwise under external force, but cannot rotate counterclockwise.

[0043] like Figure 5As shown, the limiting component 8 includes a front baffle 801, which (via a torsion spring) is elastically rotatably mounted on the other side (right side) of the lower end of the base 1 and engages with the ratchet 201. It can be understood that when the front baffle 801 abuts against the outside of the ratchet 201 under the action of elastic force, i.e., when the ratchet 201 is not subjected to other external forces, the limiting force of the front baffle 801 on the ratchet 201 is greater than the restoring force of the spiral spring 9, thereby keeping the stopped roller 2 stationary.

[0044] like Figure 3 As shown, the handle assembly 3 includes a handle plate 301 and a limiting structure 302 mounted on the handle plate 301. The handle plate 301 is rotatably mounted on the base 1. The handle plate 301 is suitable for locking in a first position or a second position by the limiting structure 302. The handle plate 301 is provided with a protrusion 13, a protrusion 2 14 and a protrusion 3 15 in sequence along the circumferential direction.

[0045] Specifically, such as Figure 3 As shown, the limiting structure 302 includes a limiting plate and a torsion spring. The limiting plate is elastically and movably mounted on the handle plate 301 by the torsion spring. The upper end of the base 1 is provided with a first groove 16 and a second groove 17. The first groove 16 is used to form a first position, and the second groove 17 is used to form a second position.

[0046] To facilitate a more detailed understanding of the coordination between various structures, the specific working principles of the three modes mentioned above are described below:

[0047] Mode 1: such as Figure 4 As shown, the limiting plate is located in the first groove 16 at this time, and the limiting plate will be locked in the first groove 16 under the action of the torsion spring, so that the handle plate 301 can only move in the first position. Figure 5 As shown, at this time, the protrusion 13 on the handle plate 301 presses against the lower locking plate 701, thereby separating the lower locking plate 701 from the ratchet 201. This releases the ratchet 201 from its counter-clockwise rotation. Meanwhile, the front baffle 801, under the force of the torsion spring, abuts against the external position of the ratchet 201, thus limiting its movement. Pulling the belt 4 to the right at this time allows it to be pulled out of the tensioner for use. When pulling stops, the ratchet 201, under the action of the front baffle 801, is again limited, preventing the belt 4 from retracting and returning to its original position.

[0048] Mode 2: such as Figure 6As shown, the handle plate 301 is still in the first position. Rotating the handle plate 301 counterclockwise causes the first protrusion 13 to remain engaged with the lower locking plate 701, thus separating the lower locking plate 701 from the ratchet 201. The second protrusion 14, when rotated, presses against the front baffle 801, causing it to rotate clockwise and move away from the ratchet 201. This frees the ratchet 201, allowing the pulled-out belt 4 to retract and reset under the action of the spiral spring 9. When the handle plate 301 is released, the front baffle 801 resets under the elastic force until it abuts against the ratchet 201, keeping the ratchet 201 stationary again. Repeating this operation allows for intermittent retraction of the belt 4, preventing the danger of excessively fast retraction.

[0049] Of course, mode two can also be operated in this way: when the front baffle 801 is squeezed by the rotation of the handle plate 301, the force of the front baffle 801 on the ratchet 201 is reduced, but there is still a certain damping force on the ratchet 201. This damping force can be flexibly adjusted by the rotation of the handle plate 301, thereby greatly reducing the speed of the belt 4 during retraction and improving safety.

[0050] Mode 3: such as Figure 2 As shown, one end of the limiting plate can be pressed up and then rotated counterclockwise via the handle plate 301, causing the limiting plate to pass over the first groove 16 and enter the second groove 17, as shown. Figure 8 As shown, at this time, the limiting plate will abut against the bottom end of the second groove 17 under the action of the elastic force, thus allowing the handle plate 301 to move only in the second position. It is worth mentioning that the distance between the first groove 16 and the central shaft 202 is greater than the distance between the second groove 17 and the central shaft 202. That is to say, when the limiting plate is located in the first groove 16, the limiting plate and the ratchet 201 are in a far-away state. Figure 5 As shown, the limiting plate will not affect the rotation of the ratchet 201 at this time. However, when the limiting plate is located in the second groove 17, as... Figure 8 As shown, at this time, the protrusion 13 and the lower locking piece 701 are separated and then the lower locking piece 701 abuts against the tooth groove of the ratchet 201 under the action of elastic force; while the protrusion 3 15 presses the front baffle 801 to separate the front baffle 801 from the ratchet 201, thereby releasing the limiting effect on the ratchet 201.

[0051] Understandably, this mode involves tightening belt 4: such as Figure 9As shown, rotating the handle plate 301 clockwise causes the limiting plate to rotate the ratchet 201 clockwise by a certain angle, thereby winding (tightening) the belt 4 a certain distance. After tightening, the ratchet 201 will not reverse under the action of the lower locking plate 701 (i.e., it remains in the tightened state). Then, rotating the handle plate 301 counterclockwise, the teeth of the limiting plate and the ratchet 201 engage, thus preventing interference with the reverse reset of the handle plate 301. Then, rotating the handle plate 301 clockwise again tightens the belt 4 again. By repeating the above process, the belt 4 can be tightened.

[0052] In this embodiment, as Figure 2 as well as Figure 11 As shown, both the handle plate 301 and the base 1 adopt a "U"-shaped structure. The handle plate 301 is rotatably sleeved on the central shaft 202, and the base 1 covers the outside of the handle plate 301, thus providing protection for the handle plate 301. At the same time, this design also makes the entire device more compact, easy to assemble, and easy to carry. In addition, the "U"-shaped design of the handle plate 301 also provides sufficient space to install the limiting structure 302, ensuring that it can flexibly switch between the first position and the second position, thereby achieving precise control of the belt 4.

[0053] It should be noted that, to ensure structural stability, both the handle plate 301 and the base 1 are preferably made of metal (e.g., alloy). Furthermore, to further improve the operational comfort of the handle plate 301, such as... Figure 10 As shown, a detachable push button 12 is detachably mounted on the end of the handle plate 301. The push button 12 can be made of plastic or rubber. A flexible protrusion 18 is provided at the end of the handle plate 301. For example, the protrusion 18 can be made of a flexible metal sheet. A groove 19 is provided on the push button 12. During installation: the push button 12 is inserted into the end position of the handle plate 301. At this time, the protrusion 18 will bend and deform under the pressure of the push button 12. When the protrusion 18 aligns with the groove 19, the protrusion 18 will deform and return to its original position under its own elastic force, thus allowing the protrusion 18 to engage with the groove 19, completing the installation of the push button 12.

[0054] like Figure 1 and Figure 2As shown, to improve the aesthetics of the tensioner, a front face 11 can be installed at the front end of the tensioner. The front face 11 can be a molded plastic part, and it has a groove for the belt body 4 to pass through, thus also guiding the belt body 4. The surface of the front face 11 can be painted or electroplated to enhance its durability and appearance. For ease of use, a hook 6 can be installed at one end of the belt body 4, and a fixing strap 5 (which can be made of the same material as the belt body 4) can be installed at the rear end of the tensioner. A hook 6 is also installed at one end of the fixing strap 5, so that the two ends of the tensioner can be quickly installed and connected.

[0055] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A multifunctional strap tensioner, characterized in that, include: Base; A roller, which is elastically rotatably mounted on the base, and a belt is wound around the outside of the roller; A locking assembly, which is mounted on the base and cooperates with the winding roller; A limiting component, which is mounted on the base and cooperates with the roller; and A handle assembly is mounted on the base and cooperates with the winding roller, the locking assembly, and the limiting assembly. When the belt is pulled, the handle assembly is located in a first position on the base, and the locking assembly is adapted to release the locking of the winding roller under the action of the handle assembly. The limiting assembly abuts against the winding roller to keep the stopped winding roller stationary. When the belt is wound up, the limiting assembly is adapted to intermittently cooperate with the winding roller under the drive of the handle assembly to adjust the winding speed of the belt.

2. The multifunctional strap tensioner as described in claim 1, characterized in that: The roller includes a central shaft and a pair of ratchet wheels. The central shaft is rotatably mounted in the base, and the ratchet wheels are sleeved and mounted at both ends of the central shaft. The belt is wound around the outside of the central shaft.

3. The multifunctional strap tensioner as described in claim 2, characterized in that: The locking assembly includes a lower locking plate, which is elastically slidably mounted on one side of the lower end of the base and engages with the ratchet; the lower locking plate engages with the tooth groove of the ratchet, thereby locking the ratchet in a first direction.

4. The multifunctional strap tensioner as described in claim 3, characterized in that: The limiting component includes a front baffle, which is elastically rotatably mounted on the other side of the lower end of the base and engages with the ratchet. The front baffle is adapted to abut against the outside of the ratchet under elastic force so that the roller remains stationary.

5. The multifunctional strap tensioner as described in claim 4, characterized in that: The handle assembly includes a handle plate and a limiting structure mounted on the handle plate. The handle plate is rotatably mounted on the base, and the handle plate is adapted to be locked in a first position by the limiting structure. The handle plate is provided with a protrusion one, a protrusion two, and a protrusion three in sequence along the circumferential direction. When the belt is pulled, the first protrusion engages with the lower locking plate, thereby moving the lower locking plate away from the ratchet; when the belt is wound up, the second protrusion engages with the front baffle, thereby moving the front baffle away from the ratchet; when the belt is tightened, the handle assembly is in the second position of the base, at which time the third protrusion engages with the front baffle, thereby moving the front baffle away from the ratchet.

6. The multifunctional strap tensioner as described in claim 5, characterized in that: The limiting structure includes a limiting plate, which is elastically and movably mounted on the handle plate. The upper end of the base is provided with a first groove and a second groove, the first groove being used to form a first position and the second groove being used to form a second position. When the limiting plate is located in the first groove, the limiting plate is disengaged from the ratchet; when the limiting plate is located in the second groove, the limiting plate is engaged with the tooth groove of the ratchet.

7. The multifunctional strap tensioner as described in claim 6, characterized in that: Both the handle plate and the base have a "U" shaped structure. The handle plate is rotatably sleeved on the central shaft, and the base covers the outside of the handle plate.

8. The multifunctional strap tensioner as described in claim 7, characterized in that: The end of the handle plate is detachably fitted with a push button. The end of the handle plate is provided with an elastic protrusion four. The push button is provided with a groove, and the protrusion four is adapted to the groove.

9. The multifunctional strap tensioner as described in any one of claims 2-8, characterized in that: One end of the central axis extends out of the base and is provided with a slot. A housing is installed on the side of the base corresponding to one end of the central axis. A spiral spring is provided inside the housing. The two ends of the spiral spring are respectively connected to the slot and the inside of the housing.

10. The multifunctional strap tensioner as described in claim 9, characterized in that: The radial cross-section of the central shaft is non-circular, and the ratchet is provided with a matching socket hole, thereby realizing the synchronous rotation of the central shaft and the ratchet.

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