Safety helmet jaw belt anti-tightening mechanism

Abstract

The utility model discloses a safety helmet jaw belt anti-tightening mechanism which comprises a head circumference binding belt and a jaw belt, the outer wall of the head circumference binding belt is provided with a jaw belt hook, the outer wall of the jaw belt hook is sleeved with a jaw belt connecting piece, the jaw belt connecting piece is arranged at the end of the free end of the jaw belt, and the jaw belt connecting piece is connected with the head circumference binding belt. And the shearing force between the jaw belt hook and the jaw belt connecting piece is smaller than the pulling force applied to the jaw belt after the body of the wearer is suspended in the air. According to the anti-tightening mechanism for the jaw belt of the safety helmet, multi-point connection is adopted, and when the connecting position reaches a certain force value, it is guaranteed that the jaw belt can be disconnected when danger occurs. A cap jaw belt hook and a sheet sleeve ring-shaped jaw belt connecting piece are arranged, the jaw belt connecting piece is connected to the outer side of the jaw belt hook in a sleeving mode, and a jaw belt is connected with a head circumference binding belt. The connection strength between the jaw belt hook and the jaw belt connecting piece is set to be not easy to break due to wearing wear at ordinary times, and meanwhile, the jaw belt hook and the jaw belt connecting piece can be broken under impact force when dangers occur. And the situation that the wearer is suffocated is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of safety helmets for construction work, in particular to a safety helmet chin strap anti-tightening mechanism. Background Art

[0002] As we all know, safety helmets are important equipment to ensure the safety of workers in construction sites. There is a saying when wearing safety helmets: if you don't wear a chin strap, it's the same as not wearing it. The chin strap plays an important role in safety helmets.

[0003] In the past, safety helmets were fixed to the helmets together with the headband using rivets. To prevent the chin strap from being damaged, a metal ring was embedded in the free end of the chin strap and connected to the outside of the rivet. Install it as firmly as possible.

[0004] However, during use, especially when working at heights, some workers may fall from the air. The helmet may get stuck during the fall, strangling the wearer to death. There are also cases where the helmet gets caught when lifting materials on the lifting equipment. In this case, the chin strap is too strong, making it impossible to escape in time when the danger occurs. Utility Model Content

[0005] The utility model aims to provide a safety helmet chin strap anti-tightening mechanism to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a safety helmet chin strap anti-tightening mechanism, comprising a head circumference strap and a chin strap, the outer wall of the head circumference strap is provided with a chin strap hook, the outer wall of the chin strap hook is sleeved with a chin strap connector, wherein the chin strap connector is arranged at the free end of the chin strap, and the shear force between the chin strap hook and the chin strap connector is less than the pulling force applied to the chin strap after the wearer's body is suspended in the air.

[0007] Preferably, the chin strap hook is fixed to the head circumference strap in a T shape.

[0008] Preferably, a groove is provided on the outer wall of the head circumference strap, a T-shaped chin strap hook is arranged in the groove, and the chin strap hook and the head circumference strap are integrally formed.

[0009] Preferably, a notch is provided at the connection between the T-shaped chin strap hook and the head circumference strap.

[0010] Preferably, the chin strap connecting piece is in the shape of a thin sheet.

[0011] Preferably, a sleeve opening and a connecting groove are respectively provided on the surface of the chin strap connecting piece, and the connecting groove is connected to the chin strap.

[0012] Preferably, the top of the inner wall of the sleeve is arranged to be inclined.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The anti-strangulation mechanism of the chin strap of the safety helmet uses a multi-point connection, and the connection is set to be cut and pulled apart when a certain force value is reached, so as to ensure that the chin strap can be disconnected when it is tightened on the wearer in the event of danger. First, a protruding chin strap hook and a thin-sheet ring-shaped chin strap connector are set, and the chin strap connector is sleeved on the outside of the chin strap hook to connect the chin strap to the head circumference strap. Then, the connection strength between the chin strap hook and the chin strap connector is set to not be easily broken due to wear and tear during normal wear, and at the same time, it is ensured that it can be broken by the impact force when a danger occurs. It effectively avoids the occurrence of strangulation of the wearer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of the connection between the chin strap and the head circumference strap in a preferred embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of a head circumference strap in a preferred embodiment of the utility model;

[0017] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of the circle at A;

[0018] Figure 4 This is a schematic structural diagram of a chin strap connector in a preferred embodiment of the present invention.

[0019] In the figure: 1. head circumference strap, 2. chin strap, 3. chin strap hook, 4. chin strap connector, 5. notch, 6. connecting groove, 7. sleeve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 , the utility model provides a technical solution:

[0022] A chin strap anti-tightening mechanism for a safety helmet comprises a head circumference strap 1 and a chin strap 2, wherein the outer wall of the head circumference strap 1 located on both sides of the wearer's head is evenly provided with four chin strap hooks 3, and the outer wall of the chin strap hook 3 is sleeved with a chin strap connector 4, wherein the chin strap connector 4 is arranged at the free end of the chin strap 2, and the chin strap connector 4 is used to connect the chin strap to the head circumference strap 1.

[0023] The shear force between the chin strap hook 3 and the chin strap connector 4 is smaller than the pulling force applied to the chin strap 2 by the wearer's body when the wearer is suspended in the air. That is, when the wearer loses weight and the helmet is stuck, the impact force of the wearer's body falling on the chin strap can break the connection between the chin strap hook 3 and the chin strap connector 4, so as to avoid the dangerous situation that the chin strap 2 and the chin strap hook 3 are too firmly installed to strangle the wearer to suffocation.

[0024] Among them, the shear force between the chin strap hook 3 and the chin strap connector 4 and the impact force caused by the falling body weight are close to the optimum. Once the wearer is hung accidentally, the impact force is too large and the chin strap hook 3 and the chin strap connector 4 are directly disconnected to avoid excessive impact force on the lower jaw; if the impact force is small, in order to achieve the disconnection between the chin strap hook 3 and the chin strap connector 4, the wearer can choose to use both hands to add force to disconnect it.

[0025] The chin strap hook 3 is fixed on the head circumference strap 1 in a T-shape, with the head on the outside, for covering the chin strap connecting piece 4 for suspension.

[0026] The outer wall of the head circumference strap 1 is provided with a groove, in which a T-shaped chin strap hook 3 is arranged, and the chin strap hook 3 is integrally formed with the head circumference strap 1. A groove is arranged on the inner side of the T-shaped chin strap hook 3, which is used to easily break the chin strap hook 3 when a certain force is reached; the chin strap hook 3 is integrally formed with the head circumference strap 1, which is used to ensure the reliability of the connection between the chin strap hook 3 and the head circumference strap 1 when the shear force is not reached, so as to avoid the chin strap hook 3 and the head circumference strap 1 being easily disconnected during normal wearing, which may cause the product to be easily damaged.

[0027] A notch 5 is provided at the connection between the T-shaped chin strap hook 3 and the head circumference strap 1. The notch 5 is for making it easy to break at the notch 5 when a certain force is reached.

[0028] The jaw strap connector 4 is in the form of a thin sheet to make it lighter as a whole. At the same time, when a certain force value is reached, the jaw strap connector 4 either cuts off the jaw strap hook 3 or disconnects itself to ensure its safety.

[0029] The surface of the chin strap connector 4 is provided with a sleeve 7 and a connection groove 6, and the connection groove 6 is connected to the chin strap 2. The longitudinal length of the sleeve 7 is greater than the head width of the T-head chin strap hook 3, and the width of the sleeve 7 is less than the head width of the T-head chin strap hook 3, so that the sleeve 7 can be sleeved on the chin strap hook 3 and will not fall off by itself.

[0030] The inner wall top of the sleeve 7 is arranged in an inclined shape to facilitate cutting.

[0031] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A helmet chin strap anti-tightening mechanism, comprising a head circumference strap (1) and a chin strap (2), characterized in that: The outer wall of the head circumference strap (1) is provided with a chin strap hook (3), and the outer wall of the chin strap hook (3) is sleeved with a chin strap connector (4), wherein the chin strap connector (4) is arranged at the free end of the chin strap (2), and the shear force between the chin strap hook (3) and the chin strap connector (4) is smaller than the pulling force applied to the chin strap (2) by the wearer's body when the wearer is suspended in the air.

2. The anti-strangulation mechanism for the chin strap of a safety helmet according to claim 1, characterized in that: The chin strap hook (3) is fixed on the head circumference strap (1) in a T shape.

3. The anti-strangulation mechanism for the chin strap of a safety helmet according to claim 2, characterized in that: The outer wall of the head circumference strap (1) is provided with a groove, a T-shaped chin strap hook (3) is arranged in the groove, and the chin strap hook (3) and the head circumference strap (1) are integrally formed.

4. The anti-strangulation mechanism for the chin strap of a safety helmet according to claim 2, characterized in that: A notch (5) is provided at the connection between the T-shaped chin strap hook (3) and the head circumference strap (1).

5. The anti-tightening mechanism for the chin strap of a safety helmet according to claim 1, characterized in that: The chin strap connecting piece (4) is in the shape of a thin sheet.

6. The anti-strangulation mechanism for the chin strap of a safety helmet according to claim 1, characterized in that: The surface of the jaw strap connecting piece (4) is respectively provided with a sleeve opening (7) and a connecting groove (6), and the connecting groove (6) is connected to the jaw strap (2).

7. The anti-strangulation mechanism for the chin strap of a safety helmet according to claim 6, characterized in that: The top of the inner wall of the sleeve opening (7) is arranged in an inclined shape.

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