Quick tightening strap structure for a fire helmet

Abstract

This utility model relates to the field of fire-fighting equipment technology, and in particular to a quick-tightening strap structure for a fire helmet. It includes a first triangular strap, a second triangular strap symmetrically arranged on the left side of the first triangular strap, a chin strap positioned between the lower ends of the first and second triangular straps, a chin buckle movably mounted on the chin strap, and a safety lock positioned between the right sides of the first triangular strap and the chin strap. This utility model scientifically and rationally improves the original fire helmet strap structure by incorporating a metal buckle, a bent end, a torsion spring pivot, and a pressure plate between the second triangular strap and the left end of the chin strap. This allows for convenient tightening or loosening of the chin strap during helmet use, effectively reducing the workload and difficulty of adjusting the chin strap, thereby improving the convenience and safety of the fire helmet in actual use.

Description

Technical Field

[0001] This utility model relates to the field of fire protection equipment technology, and in particular to a quick-tightening strap structure for a fire helmet. Background Technology

[0002] The fire helmet consists of a shell, face mask, cape, and cushioning layer. It features a half-helmet design, a novel style, and is equipped with properties such as protection against impacts from sharp objects, corrosion, heat radiation, reflectivity, insulation, and lightweight. An air respirator and wireless communication system can be worn inside the helmet, and it has obvious reflective markings.

[0003] like Figure 3 As shown, this is the helmet strap structure of the previous generation installed on fire helmets in the existing technology. The left end of the chin strap is directly sewn and fixed to the left triangular belt, and the right end of the chin strap is detachably installed on the right triangular belt through a safety buckle. Although this helmet strap structure has the functions of quick binding and tightening adjustment of the chin strap, the operator needs to remove the helmet from the head to tighten the chin strap by manually adjusting its position in the fixing block. This makes it difficult for the operator to tighten and adjust the chin strap while wearing the fire helmet. The entire tightening and adjustment process is labor-intensive and difficult, reducing the convenience and efficiency of actual wearing and adjustment.

[0004] In view of this, it is particularly important to design and manufacture a quick-tightening strap structure that allows for convenient tightening and adjustment of the chin strap during the wearing of a fire helmet, thereby improving the convenience and efficiency of chin strap tightening and adjustment. Utility Model Content

[0005] The purpose of this utility model is to solve the problem that the traditional helmet strap structure on fire helmets requires the operator to remove the helmet when tightening or adjusting the chin strap, making it difficult to easily tighten or adjust the chin strap while wearing the fire helmet. Therefore, a quick-tightening strap structure for fire helmets is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A quick-tightening strap structure for a fire helmet includes a first triangular strap, a second triangular strap symmetrically arranged on the left side of the first triangular strap, a chin strap arranged between the lower ends of the first and second triangular straps, a chin buckle movably mounted on the chin strap, and a safety buckle arranged between the right sides of the first triangular strap and the chin strap. A tightening adjustment mechanism for convenient tightening or loosening of the chin strap is provided between the lower end of the second triangular strap and the left end of the chin strap.

[0008] As a further description of the above technical solution:

[0009] The tightening adjustment mechanism includes a metal buckle fixed to the lower end of the second triangular belt, a bent end fixed at an angle to the lower end of the metal buckle, a strap opening between the metal buckle and the bent end for the chin strap to pass through, and a buckle plate rotatably mounted on the outside of the metal buckle via a torsion spring shaft.

[0010] As a further description of the above technical solution:

[0011] The lower end of the snap fastener is perpendicular to the bending end, and multiple serrated grooves are equidistantly provided on the lower end of the snap fastener.

[0012] As a further description of the above technical solution:

[0013] A rubber anti-slip strip is fixedly connected to the middle of the left end of the chin strap facing the buckle piece.

[0014] As a further description of the above technical solution:

[0015] A rubber anti-slip strip is fixedly connected to the middle of the left end of the chin strap facing the buckle piece.

[0016] As a further description of the above technical solution:

[0017] The safety buckle includes a fixed buckle fixed to the lower end of the first triangular belt, a torsion spring locking block rotatably installed at the lower end of the fixed buckle, and a fixed locking block movably installed at the right end of the chin strap and capable of locking with the fixed buckle and the torsion spring locking block.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0019] In this invention, the original structure of the fire helmet strap has been scientifically and rationally improved. A metal buckle, a bent end, a torsion spring shaft, and a buckle plate are set between the second triangular strap and the left end of the chin strap. The left end of the chin strap can be inserted into the metal buckle through the strap opening. Then, under the torsional force of the torsion spring shaft, the lower end of the buckle plate can continuously twist and abut against the upper surface of the left end of the chin strap, fixing the anti-slip spring lock of the chin strap between the buckle plate and the bent end of the metal buckle. When pressed inward, the spring lock between the buckle plate and the metal buckle can be engaged, allowing for sliding adjustment of the chin strap. This structure allows for convenient tightening or loosening of the chin strap during the wearing of the fire helmet, effectively reducing the workload and difficulty of tightening and adjusting the chin strap, thereby improving the convenience and safety of the fire helmet in actual use. Attached Figure Description

[0020] Figure 1This is a structural diagram of a quick-tightening strap structure for a fire helmet in its disassembled state, as proposed in this utility model.

[0021] Figure 2 A schematic diagram of the quick-tensioning strap structure for fire helmets in its combined configuration.

[0022] Figure 3 This is a schematic diagram of the helmet strap structure of the previous generation of fire helmets in the existing technology.

[0023] Legend:

[0024] 1. First V-belt; 101. Fixed buckle; 102. Torsion spring locking block; 2. Second V-belt; 3. Chin strap; 301. Rubber anti-slip strip; 4. Chin buckle sleeve; 5. Fixed locking block; 6. Metal buckle; 601. Belt insertion opening; 602. Bend end; 7. Torsion spring pivot; 8. Buckle clip; 801. Serrated groove; 802. Pressing end. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] Please see Figure 1-3 This utility model provides a technical solution: a quick-tightening strap structure for a fire helmet, including a first triangular strap 1, a second triangular strap 2 symmetrically arranged on the left side of the first triangular strap 1, a chin strap 3 arranged between the lower ends of the first triangular strap 1 and the second triangular strap 2, a chin buckle 4 movably installed on the chin strap 3, and a safety buckle arranged between the right side of the first triangular strap 1 and the chin strap 3. A tightening adjustment mechanism for convenient tightening or loosening of the chin strap 3 is provided between the lower end of the second triangular strap 2 and the left end of the chin strap 3.

[0027] Specifically, such as Figure 1 and Figure 2 As shown, the tightening and adjusting mechanism includes a metal buckle 6 fixed to the lower end of the second triangular belt 2, a bent end 602 fixed at an angle to the lower end of the metal buckle 6, a strap opening 601 opened between the metal buckle 6 and the bent end 602 for the chin strap 3 to pass through, and a buckle piece 8 rotatably mounted on the outside of the metal buckle 6 via a torsion spring shaft 7.

[0028] The lower end of the snap fastener 8 is perpendicular to the bending end 602. The lower end of the snap fastener 8 is provided with multiple serrated grooves 801 at equal intervals, which effectively increases the contact surface and contact friction between the lower end of the snap fastener 8 and the upper surface of the left end of the jaw strap 3, thereby improving the locking force applied by the snap fastener 8 to the jaw strap 3. At the same time, the upper end of the snap fastener 8 is integrally fixedly connected with an outward bending pressing end 802, which allows the part of the jaw strap 3 that needs to be spring-locked to be perpendicular to the lower end of the snap fastener 8.

[0029] In addition, a rubber anti-slip strip 301 is fixedly connected to the middle of the side of the left end of the chin strap 3 facing the buckle plate 8, which effectively increases the contact area between the chin strap 3 and the buckle plate 8 and relieves friction, thereby improving the locking effect of the chin strap 3 after tightening and adjustment.

[0030] Specifically, such as Figure 1-3 As shown, the safety buckle includes a fixed buckle 101 fixed to the lower end of the first triangular belt 1, a torsion spring locking block 102 rotatably installed at the lower end of the fixed buckle 101, and a fixed locking block 5 movably installed at the right end of the lower jaw belt 3 and lockable with the fixed buckle 101 and the torsion spring locking block 102. After the fixed locking block 5 is inserted between the fixed buckle 101 and the torsion spring locking block 102, the right end of the lower jaw belt 3 can be fixedly connected with the first triangular belt 1. When the torsion spring locking block 102 is flipped outward, the locking teeth of the torsion spring locking block 102 can be rotated away from the locking teeth on the fixed locking block 5. At this time, the fixed locking block 5 can be pulled downward away from the fixed buckle 101.

[0031] Working principle: In use, the first triangular belt 1 and the second triangular belt 2 are pre-adjusted and fixed to the lower sides of the fire helmet. Then, a fixing block 5 is installed on the right end of the chin strap 3. When the fixing block 5 is inserted between the fixing buckle 101 and the torsion spring locking block 102, the locking operation between the first triangular belt 1 and the right end of the chin strap 3 can be realized. The operator continues to hold and press the pressing end 802 on the buckle plate 8 inward, so that the lower end of the buckle plate 8 can rotate away from the bent end 602 of the metal buckle 6. The left end of the chin strap 3 can then pass through the strap opening 601 and out of the metal buckle 6. When the chin strap 3 is adjusted to a suitable wearing tightness, the pressing end 802 can be released. At this time, under the torsional force of the torsion spring shaft 7, the lower end of the buckle plate 8 can be twisted back to its original position, squeezing and fixing the left end of the chin strap 3 between the lower end of the buckle plate 8 and the bent end 602 of the metal buckle 6. At this time, the spring lock fixing treatment of the adjusted chin strap 3 is completed.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quick-tightening strap structure for a fire helmet, comprising a first triangular strap (1), a second triangular strap (2) symmetrically arranged on the left side of the first triangular strap (1), a chin strap (3) disposed between the lower ends of the first triangular strap (1) and the second triangular strap (2), a chin buckle (4) movably mounted on the chin strap (3), and a safety buckle disposed between the right sides of the first triangular strap (1) and the chin strap (3), characterized in that, A tightening adjustment mechanism for convenient tightening or loosening of the jaw strap (3) is provided between the lower end of the second triangular belt (2) and the left end of the jaw strap (3).

2. The quick-tightening strap structure for a fire helmet according to claim 1, characterized in that, The tightening adjustment mechanism includes a metal buckle (6) fixed at the lower end of the second triangular belt (2), a bent end (602) fixed at the lower end of the metal buckle (6) at an angle, a strap opening (601) opened between the metal buckle (6) and the bent end (602) for the chin strap (3) to pass through, and a buckle piece (8) rotatably mounted on the outside of the metal buckle (6) via a torsion spring shaft (7).

3. The quick-tightening strap structure for a fire helmet according to claim 2, characterized in that, The lower end of the snap fastener (8) is perpendicular to the bending end (602), and the lower end of the snap fastener (8) is provided with a plurality of serrated grooves (801) at equal intervals.

4. The quick-tightening strap structure for a fire helmet according to claim 2, characterized in that, A rubber anti-slip strip (301) is fixedly connected to the middle of the side of the left end of the chin strap (3) facing the buckle (8).

5. The quick-tightening strap structure for a fire helmet according to claim 2, characterized in that, The upper end of the snap fastener (8) is integrally fixedly connected to an outwardly bent pressing end (802).

6. The quick-tightening strap structure for a fire helmet according to claim 1, characterized in that, The safety buckle includes a fixed buckle (101) fixed to the lower end of the first triangular belt (1), a torsion spring locking block (102) rotatably installed at the lower end of the fixed buckle (101), and a fixed locking block (5) movably installed at the right end of the chin strap (3) and can be locked with the fixed buckle (101) and the torsion spring locking block (102).

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