A flat hook for a vehicle safety tensioner

Abstract

A flat hook for a vehicle safety tensioning device, comprising a flat hook, an upper portion of the flat hook is provided with a belt passing hole for a belt of the vehicle safety tensioning device, and a positioning hole is further provided on the flat hook and is located below the belt passing hole, a magnetic attraction device is installed on the positioning hole, and a magnetic attraction surface of the magnetic attraction device is located on a bent side of the flat hook. The flat hook for the vehicle safety tensioning device has the advantages that the positioning hole is arranged below the belt passing hole, the magnetic attraction device is installed on the positioning hole, the magnetic attraction surface of the magnetic attraction device is located on the bent side of the flat hook, the magnetic attraction surface is in contact with and tightly attracted to the anchoring point after the contact, the flat hook can be adsorbed on the anchoring point, the flat hook is prevented from falling off the anchoring point, and the operation is simple and fast.

Description

Technical Field

[0001] This utility model relates to a flat hook for securing cargo on vehicles such as automobiles, trailers, airplanes, and ships. Background Technology

[0002] In the freight transportation sector, vehicle safety tensioning devices are crucial equipment for ensuring the secure transport of goods. They primarily consist of a tensioning unit and tie-down straps. The tie-down straps are divided into a fixed strap and an adjusting strap. Both the fixed and adjusting straps are composed of webbing and metal hooks. One end of the webbing is connected to the metal hook, which is used to connect to the corresponding anchor point on the truck or other transport vehicle. Specifically, the fixed strap is shorter, with one end connected to the hook and the other end connected to the unit. The adjusting strap is relatively longer, with one end connected to the hook and the other end being a free end. During use, this free end is inserted into the main shaft of the unit. By adjusting the length from the hook to the unit, it can adapt to different situations and the size of the goods requiring tensioning. The unit typically employs an anti-reverse rotation ratchet mechanism, securing the goods by wrapping the webbing around the main shaft and tightening it. In practice, taking the overhead securing method for vehicles such as trucks and trailers as an example, the typical procedure is as follows: first, connect the hook of the adjusting strap to the anchor point on one side of the cargo box; then, pass the adjusting strap over the cargo, placing the free end on the other side of the cargo box so that the free end can be threaded through the main unit connected to the fixing strap to complete the securing work. However, if only one person is operating this process, the hook of the adjusting strap is very likely to detach from the anchor point when the operator is focused on operating the main unit, making subsequent securing operations impossible. Even if the hook is correctly connected during operation, there is still a risk of the hook coming off during cargo transportation if extreme situations such as bumps or sudden braking occur. Once the hook comes off, it may cause the cargo to overturn, leading to a serious safety accident. To solve the above-mentioned hook detachment problem, some hooks in the existing technology are equipped with elastic safety buckles. These safety buckles cooperate with the hook to form a closed loop structure, making it difficult for the hook to come off after it is hooked into the anchor point. However, in practical applications, there exists a special type of flat hook whose corresponding anchor points are mostly rails or wide flat plates. Due to structural limitations, the aforementioned elastic safety buckles cannot be applied to flat hooks, leading to the possibility of the flat hook detaching during use. In summary, existing hooks, especially flat hooks, still have shortcomings in terms of operational convenience and transportation safety, and are prone to detachment, causing operational inconvenience and safety accidents during transportation. Therefore, further improvements are urgently needed to avoid the adverse consequences of flat hook detachment. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a flat hook for automobile safety tensioning devices that prevents the hook from falling off the anchor point during transportation, in light of the above-mentioned existing technology.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a flat hook for a car safety tensioning device, including a plate hook, the upper part of which has a threading hole for the webbing of the car safety tensioning device to pass through, characterized in that: a positioning hole is also opened on the plate hook, the positioning hole is located below the threading hole, and a magnetic attraction device is installed on the positioning hole, the magnetic attraction surface of the magnetic attraction device is located on the bent side of the plate hook.

[0005] To facilitate the installation and removal of the magnetic attraction device, preferably, the magnetic attraction device is detachably mounted on the plate hook.

[0006] The magnetic attraction device can have various structures. Preferably, the magnetic attraction device includes a fixed base and a magnet. The fixed base is mounted on a positioning hole and has a mounting cavity. The magnet is disposed in the mounting cavity and fixed to the fixed base, and the magnet has a magnetic attraction surface facing the opening side of the mounting cavity. With this configuration, the magnet can be inserted into the mounting cavity from the opening side, making installation and removal very convenient.

[0007] Magnets can have various structures. Preferably, the magnet includes a permanent magnet, a shell, and a magnetic shield. The permanent magnet is located at the center, and the shell is located on the periphery. The permanent magnet and the shell are separated by the magnetic shield. The shell sits within the mounting cavity, and the permanent magnet has a magnetic attraction surface formed on it. With this structure, the shell guides and concentrates the magnetic field of the permanent magnet, focusing the dispersed magnetic field onto the magnetic attraction surface. This reduces circumferential magnetic leakage and significantly improves the magnet's attraction force.

[0008] Further optimization involves using a steel shell for the magnet's outer casing.

[0009] As a preferred embodiment, the center of the housing is formed with a first nut post with internal threads, the permanent magnet has a central through hole and is sleeved on the first nut post, the mounting cavity has a through hole, and the screw passes through the through hole and is fixed on the first nut post.

[0010] As another preferred embodiment, the back of the housing extends outward to form a second nut post with internal threads, the mounting cavity has a through hole, the permanent magnet is a solid structure, and the screw passes through the through hole and is fixed to the second nut post.

[0011] As another preferred embodiment, the permanent magnet has a countersunk through hole at its center, the mounting cavity has a through hole, a screw passes through the countersunk through hole and the through hole from one side of the magnetic attraction surface, and a nut is screwed in from the other side of the plate hook and fixed to the screw.

[0012] As another preferred embodiment, the back of the housing extends outward to form a screw with external threads, the mounting cavity has a through hole, the permanent magnet is a solid structure, the screw passes through the through hole, and the nut is located on the outside of the fixing seat and fixed to the screw.

[0013] To cover the rear of the mounting base, a rear cover is also included. The mounting base passes through the positioning hole and is exposed outside the plate hook. The rear cover is located outside the plate hook and covers the exposed portion of the mounting base.

[0014] As another preferred embodiment, the magnet has a protruding third nut post, on which a spring is fitted. The spring is located within the mounting cavity, with its two ends abutting against the magnet and the fixing seat, respectively. The third nut post passes through a through hole, and a screw is located on the outside of the fixing seat. The screw is screwed into the third nut post to fix the magnet to the fixing seat. Alternatively, the magnet has a protruding rivet post, on which a spring is fitted. The spring is located within the mounting cavity, with its two ends abutting against the magnet and the fixing seat, respectively. The rivet post is fixed to the fixing seat. With this structure, the magnet can protrude under the force of the spring, facilitating adsorption, increasing the attraction force, and making the adsorption more secure. If, during operation, the anchor point exerts pressure on the magnet, the magnet will axially retract along the mounting cavity of the fixing seat until it is flush with the plane of the fixing seat or the flat hook, avoiding damage under pressure.

[0015] Preferably, the positioning hole is a circular hole, a polygonal hole, or other irregularly shaped hole. Using polygonal or irregularly shaped holes can prevent the fixing seat from rotating relative to the plate hook.

[0016] Compared with the prior art, the advantages of this utility model are as follows: the flat hook for automobile safety tensioning device has a positioning hole set below the strap hole, and the magnetic suction device is installed on the positioning hole. Furthermore, the magnetic suction surface of the magnetic suction device is located on the bent side of the flat hook. After the magnetic suction surface contacts and firmly attracts the anchor point, the flat hook can be attracted to the anchor point, thereby preventing the flat hook from falling off the anchor point. The operation is simple and quick. Attached Figure Description

[0017] Figure 1 This is a three-dimensional exploded view of Embodiment 1 of the present utility model;

[0018] Figure 2a This is a front view of Embodiment 1 of the present utility model;

[0019] Figure 2b This is a rear view of Embodiment 1 of the present utility model;

[0020] Figure 3 This is a perspective view of Embodiment 1 of the present utility model;

[0021] Figure 4This is a cross-sectional view of Embodiment 1 of the present utility model;

[0022] Figure 5 This is a three-dimensional schematic diagram of the connected webbing in Embodiment 1 of this utility model;

[0023] Figure 6 This is a schematic diagram illustrating the application of Embodiment 1 of this utility model;

[0024] Figure 7 This is an exploded perspective view of Embodiment 2 of the present invention;

[0025] Figure 8 This is an exploded perspective view of Embodiment 3 of this utility model;

[0026] Figure 9 This is an exploded perspective view of Embodiment 4 of this utility model;

[0027] Figure 10 This is an exploded perspective view of Embodiment 5 of this utility model;

[0028] Figure 11a This is a front perspective view of Embodiment 5 of this utility model;

[0029] Figure 11b This is a perspective view of the back of Embodiment 5 of this utility model;

[0030] Figure 12a This is a cross-sectional view of the magnet extending out in Embodiment 5 of this utility model;

[0031] Figure 12b This is a retracted sectional view of the magnet in Embodiment 5 of this utility model;

[0032] Figure 13 This is an exploded perspective view of Embodiment Six of this utility model;

[0033] Figure 14 This is a cross-sectional view of Embodiment Six of this utility model;

[0034] Figure 15 This is an exploded perspective view of Embodiment Seven of this utility model;

[0035] Figure 16 This is a cross-sectional view of Embodiment Seven of this utility model. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0037] Example 1:

[0038] like Figures 1 to 4As shown, the flat hook 1 for the automotive safety tensioning device in this embodiment includes a plate hook 1, on which a separate strap hole 11 and a positioning hole 12 are provided, with the positioning hole 12 located below the strap hole 11. A magnetic attraction device is installed on the positioning hole 12, and the magnetic attraction device is detachably connected to the plate hook 1. The magnetic attraction surface 211 of the magnetic attraction device is located on the bent side of the plate hook 1.

[0039] like Figure 5 As shown, the webbing 8 of the vehicle safety tensioning device passes through the threading hole 11. After the webbing 8 is threaded through the threading hole 11, it is folded back and sewn on, and the flat hook is attached to the webbing 8 to form the binding strap of the vehicle safety tensioning device. Figure 6 As shown, when the flat hook is hooked into the anchor point 9, the magnetic surface 211 contacts and is firmly attracted to the anchor point 9, so that the binding strap with the flat hook will not fall off, which facilitates the next step of operation.

[0040] The magnetic attraction device of this embodiment includes a fixed base 3 and a magnet 2. The fixed base 3 is installed on the positioning hole 12 and has a mounting cavity 31. The magnet 2 is disposed in the mounting cavity 31 and fixed on the fixed base 3. The magnetic attraction surface 211 of the magnet 2 faces the opening side of the mounting cavity 31.

[0041] Magnet 2 is a pot magnet, specifically comprising a permanent magnet 21, a shell 22, and a magnetic shield 23. The permanent magnet 21 is located at the center, and the shell 22 is located on the periphery. The permanent magnet 21 and the shell 22 are separated by the magnetic shield 23. The shell 22 sits within the mounting cavity 31, and a magnetic attraction surface 211 is formed on the permanent magnet 21. The steel shell 22 converges and guides the magnetic field of the permanent magnet 21, concentrating the dispersed magnetic field on the magnetic attraction surface 211, reducing circumferential magnetic leakage, thereby significantly improving the attraction force per unit volume. Pot magnets come in various shapes, such as round, rectangular, polygonal, and irregular shapes. This embodiment uses a round pot magnet. As a common form of magnet on the market, the structural features and functional advantages of pot magnets are publicly available and mature technologies, and will not be elaborated further.

[0042] In this embodiment, a first nut post 221 with internal threads is formed at the center of the outer shell 22. The permanent magnet 21 has a central through hole 212 and is sleeved on the first nut post 221. The mounting cavity 31 has a through hole 311. The screw 5 passes through the through hole 311 and is fixed on the first nut post 221. After the fixing seat 3 is installed, the fixing seat 3 passes through the positioning hole 12 and is exposed outside the plate hook 1. The rear cover 4 is located on the outside of the plate hook 1 and covers the exposed part of the fixing seat 3.

[0043] Example 2:

[0044] like Figure 7As shown, in this embodiment, the back of the outer casing 22 extends outward to form a second nut post 222 with internal threads. The screw 5 passes through the through hole 311 and is fixed on the second nut post 222. The rest of the structure of this embodiment is the same as that of Embodiment 1, and will not be described again here.

[0045] Example 3:

[0046] like Figure 8 As shown, in this embodiment, the permanent magnet 21 of the magnet 2 has a countersunk through hole 213 at its center. The screw 5 passes through the countersunk through hole 213 and the through hole 311 from one side of the magnetic attraction surface 211. The nut 6 is screwed into the screw 5 from the other side of the plate hook 1. The rest of the structure of this embodiment is the same as that of Embodiment 1, and will not be described again here.

[0047] Example 4:

[0048] like Figure 9 As shown, in this embodiment, the permanent magnet 21 of the magnet 2 is a solid structure, and the back of the outer shell 22 extends outward to form a screw 224 with external threads. The screw 224 passes through the through hole 311, and the nut 6 is located on the outside of the fixing seat 3 and fixed on the screw 224.

[0049] Example 5:

[0050] like Figures 10 to 1 As shown in Figure 2, in this embodiment, the magnet 2 has a protruding third nut post 223. A spring 7 is fitted onto the third nut post 223. The spring 7 is located inside the mounting cavity 31, and its two ends abut against the magnet 2 and the fixing seat 3, respectively. The third nut post 223 passes through the through hole 311. A screw 5 is located on the outside of the fixing seat 3. The screw 5 is screwed into the third nut post 223 to fix the magnet 2 onto the fixing seat 3. In order to cover the third nut post 223, a washer 10 is fitted onto the screw 5 in this embodiment.

[0051] In this embodiment, the fixing base 3 has a first mounting hole 32 on each side. Correspondingly, the corresponding position of the plate hook 1 has a second mounting hole 13. The fastening screw 100 passes through the first mounting hole 32 and is fixed in the second mounting hole 13, thereby fixing the fixing base 3 to the plate hook 1.

[0052] In addition to using threaded connection for fixing, a riveting structure can also be used. For example, a protruding riveting post can be set on the magnet 2, and the spring 7 is set in the mounting cavity 31 and sleeved on the riveting post. The two ends of the spring 7 abut against the magnet 2 and the fixing seat 3 respectively, and the riveting post is fixed on the fixing seat 3.

[0053] In this embodiment, the flat hook adopts a spring structure, such as Figure 12a As shown, the fixing base 3 is fixed to the plate hook 1, and the magnet 2 protrudes under the force of the spring 11 to facilitate adsorption, making the attraction stronger and the adsorption more secure.Figure 12b As shown, when the protruding magnet 2 is subjected to external force, the most common one is the pressure generated by the anchor point 9 on the magnet 2 during operation. The magnet 2 retracts axially along the mounting cavity 31 of the fixed seat 3 until it is flush with the plane of the fixed seat 3 or the flat hook, so as to avoid damage under pressure.

[0054] Example 6:

[0055] like Figure 13 and Figure 14 As shown, the structure of magnet 2 in this embodiment is the same as that in embodiment 1, and the structure of fixing base 3 is the same as that in embodiment 5. The details will not be repeated here.

[0056] Example 7:

[0057] like Figure 15 and Figure 16 As shown, the structure of magnet 2 in this embodiment is the same as that in embodiment four, and the structure of fixing base 3 is the same as that in embodiment five. The details will not be repeated here.

[0058] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0059] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, various modifications or improvements can be made to the present utility model without departing from the principle of the present utility model. For example, the structure of the fixing seat is not limited to the form given in the above embodiments, the connection structure between the magnet and the fixing seat is not limited to the form given in the above embodiments, and the fixing method between the fixing seat and the plate hook is not limited to the form given in the above embodiments. All of these are considered to be within the protection scope of the present utility model.

Claims

1. A flat hook (1) for an automotive safety tensioning device, comprising a plate hook (1), wherein the upper part of the plate hook (1) has a threading hole (11) for the webbing of the automotive safety tensioning device to pass through, characterized in that: A positioning hole (12) is also provided on the plate hook (1). The positioning hole (12) is located below the strap hole (11). A magnetic suction device is installed on the positioning hole (12). The magnetic suction surface (211) of the magnetic suction device is located on the bent side of the plate hook (1).

2. The flat hook (1) for a vehicle safety tensioning device according to claim 1, characterized in that: The magnetic attraction device can be detachably installed on the plate hook (1).

3. The flat hook (1) for a vehicle safety tensioning device according to claim 2, characterized in that: The magnetic attraction device includes a fixed base (3) and a magnet (2). The fixed base (3) is installed on the positioning hole (12) and has a mounting cavity (31). The magnet (2) is located in the mounting cavity (31) and fixed on the fixed base (3). The magnet (2) has the magnetic attraction surface (211) facing the opening side of the mounting cavity (31).

4. The flat hook (1) for a vehicle safety tensioning device according to claim 3, characterized in that: The magnet (2) includes a permanent magnet (21), a shell (22) and a magnetic shield (23). The permanent magnet (21) is located at the center, and the shell (22) is located on the periphery. The permanent magnet (21) and the shell (22) are separated by the magnetic shield (23). The shell (22) is located in the mounting cavity (31). The permanent magnet (21) has a magnetic attraction surface (211) formed on it.

5. The flat hook (1) for a vehicle safety tensioning device according to claim 4, characterized in that: The outer shell (22) has a first nut post (221) with internal threads formed at its center. The permanent magnet (21) has a central through hole (212) and is sleeved on the first nut post (221). The mounting cavity (31) has a through hole (311). The screw (5) passes through the through hole (311) and is fixed on the first nut post (221).

6. The flat hook (1) for a vehicle safety tensioning device according to claim 4, characterized in that: The back of the outer shell (22) extends outward to form a second nut post (222) with internal threads. The mounting cavity (31) has a through hole (311). The permanent magnet (21) is a solid structure. The screw (5) passes through the through hole (311) and is fixed on the second nut post (222).

7. The flat hook (1) for a vehicle safety tensioning device according to claim 4, characterized in that: The permanent magnet (21) has a countersunk through hole (213) at its center, and the mounting cavity (31) has a through hole (311). The screw (5) passes through the countersunk through hole (213) and the through hole (311) from one side of the magnetic attraction surface (211), and the nut (6) is screwed into the screw (5) from the other side of the plate hook (1).

8. The flat hook (1) for a vehicle safety tensioning device according to claim 4, characterized in that: The back of the outer shell (22) extends outward to form a screw (224) with external threads. The mounting cavity (31) has a through hole (311). The permanent magnet (21) is a solid structure. The screw (224) passes through the through hole (311). The nut (6) is located on the outside of the fixing seat (3) and fixed on the screw (224).

9. The flat hook (1) for an automotive safety tensioning device according to any one of claims 3 to 8, characterized in that: It also includes a back cover (4), the fixing seat (3) passes through the positioning hole (12) and is exposed on the plate hook (1), the back cover (4) is located on the outside of the plate hook (1) and covers the exposed part of the fixing seat (3).

10. The flat hook (1) for a vehicle safety tensioning device according to claim 3, characterized in that: The magnet (2) has a protruding third nut post (223), on which a spring (7) is fitted. The spring (7) is located in the mounting cavity (31), and the two ends of the spring (7) abut against the magnet (2) and the fixing seat (3) respectively. The third nut post (223) passes through the through hole (311), and a screw (5) is located on the outside of the fixing seat (3). The screw (5) is screwed into the third nut post (223) to fix the magnet (2) on the fixing seat (3); or, the magnet (2) has a protruding rivet post, on which a spring (7) is fitted. The spring (7) is located in the mounting cavity (31), and the two ends of the spring (7) abut against the magnet (2) and the fixing seat (3) respectively. The rivet post is fixed on the fixing seat (3).

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