Helmet head circumference adjusting structure and helmet thereof

Abstract

The utility model discloses a helmet head circumference adjusting structure and a helmet thereof, and belongs to the technical field of helmets and accessories thereof. Comprising an adjusting part and a connecting part which are integrally formed, the overall shape of the adjusting part is a cambered surface facing the head, and the cambered surface is in the left-right direction; the adjusting part is composed of two adjusting pieces which are symmetrical along the vertical center line of the adjusting part, the left adjusting piece and the right adjusting piece are both in the shape of a cambered surface facing the head, the cambered surface direction is the vertical direction, and a groove with a downward opening is formed in the middle of the adjusting part. The utility model provides a helmet head circumference adjusting structure and a helmet thereof, and solves the problems that a traditional helmet is high in manufacturing cost and needs to be manually adjusted during use.

Description

Technical Field

[0001] The utility model relates to the technical field of helmets and accessories thereof, and more specifically to a helmet head circumference adjustment structure and the helmet thereof. Background Art

[0002] As a head protection device, helmets are widely used in transportation, cycling, and the construction industry. Currently, there are three common types of helmet head circumference adjustment structures: one is a strap, which can be a rack structure; the second is a knob form, which is adjusted by turning the knob to generate tension at the end; and the third is Velcro. Among them, Velcro is the simplest to make, but after a period of use, Velcro is prone to elasticity loss, resulting in loose wearing of the helmet. The strap and knob adjustment methods are expensive to make and require manual adjustment.

[0003] Based on the above problems, we propose a helmet head circumference adjustment structure and a helmet thereof, which can save costs and enable the helmet to have a quick head circumference adjustment effect when worn. Summary of the Invention

[0004] The utility model aims to overcome the problems of high manufacturing cost and manual adjustment required for the current helmet head circumference adjustment structure proposed in the above background technology, and provides a helmet head circumference adjustment structure and a helmet thereof.

[0005] In order to solve the above technical problems, the technical solutions of the present utility model are as follows:

[0006] A helmet head circumference adjustment structure includes an integrally formed adjustment portion and a connecting portion. The overall shape of the adjustment portion is an arc-shaped surface facing the head, with the arc surface oriented in the left and right directions. The adjustment portion is composed of two adjustment plates symmetrical along their vertical midlines. The left adjustment plate and the right adjustment plate are both shaped like arc-shaped surfaces facing the head, with the arc surface oriented in the up and down directions. A groove with an opening facing downward is provided in the middle of the adjustment portion.

[0007] Preferably, both the left adjusting piece and the right adjusting piece are provided with a through hole facing the head.

[0008] Preferably, the groove is in the shape of an inverted "V".

[0009] Preferably, there are two through holes on the left adjustment piece or the right adjustment piece in the upper and lower directions, and the side length of the upper through hole in the vertical direction is smaller than that of the lower through hole, wherein,

[0010] The length direction of the upper through hole is arranged along the left-right direction; the length direction of the lower through hole is arranged along the up-down direction, and the upper side length of the lower through hole is greater than the lower side length;

[0011] The through holes on the left adjusting piece and the through holes on the right adjusting piece are arranged symmetrically.

[0012] Preferably, the connecting portion is provided with corrugated grooves in the front and rear directions.

[0013] Preferably, the corners and internal through holes of the adjustment portion are chamfered.

[0014] The present application also provides a helmet, comprising any one of the above-mentioned helmet head circumference adjustment structures, wherein the adjustment portion is fixed to the inner wall of the helmet via a connecting portion.

[0015] Preferably, the adjusting portion is fixed to the rear end or the front end of the inner wall of the helmet through a connecting portion.

[0016] Preferably, the fixing method of the connecting portion to the inner wall of the helmet includes but is not limited to bolt connection, bonding, integral molding or snap fixation.

[0017] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0018] The utility model provides a helmet head circumference adjustment structure and a helmet thereof, wherein the internal head circumference adjustment structure does not require manual adjustment and can automatically fit the head when worn by the user, and supports the head through its elastic force; at the same time, the head circumference adjustment structure does not require complicated processes when manufactured and can be formed by compression molding with a plastic mold, can be mass-produced, and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic structural diagram of the adjustment part and the connection part of the utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure of the adjustment part, connection part and helmet of the present invention.

[0022] Explanation of the markings in the figure: 1. Adjustment part; 11. Adjustment piece; 12. Through hole; 2. Connection part; 3. Helmet. DETAILED DESCRIPTION

[0023] In order to better understand the purpose, structure and function of the present invention, the technical solution of the present invention is further described in detail below with reference to the accompanying drawings and specific preferred embodiments.

[0024] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper", "lower", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They 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. "First", "second", etc. do not indicate the importance of the components, and therefore cannot be understood as limiting the present invention. The specific dimensions used in the embodiments are only for illustrating the technical solution and do not limit the scope of protection of the present invention. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0025] Unless otherwise expressly specified or limited, terms such as "installed," "installed," "connected," and "fixed" should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. Example

[0026] See also Figure 1-2 The present application provides a head circumference adjustment structure of a helmet 3, comprising an integrally formed adjustment portion 1 and a connecting portion 2. The overall shape of the adjustment portion 1 is an arc-shaped surface facing the head, with the arc surface direction being the left and right directions; the adjustment portion 1 is composed of two adjustment pieces 11 symmetrical along its vertical midline, and the shapes of the left adjustment piece 11 and the right adjustment piece 11 are both arc-shaped surfaces facing the head, with the arc surface direction being the up and down directions, wherein a groove with an opening facing downward is provided in the middle of the adjustment portion 1.

[0027] In the above embodiment, the overall shape of the adjustment part 1 is set to face the head and can be located at the rear of the helmet 3 and pressed by the head; or installed at the front of the head warehouse and pressed by the forehead. The present application provides a scenario where it is located at the rear of the helmet 3. In this embodiment, the adjustment part 1 is formed as a whole by one-piece compression molding, and the arc surface direction is the left and right direction, which fits the shape of the back of the head. When worn, the back of the head squeezes the left and right sides of the adjustment part 1, so that the two sides of the adjustment part 1 are expanded outward. After the adjustment part 1 is expanded, it will exert an elastic force in the opposite direction to adapt to the head circumference; and the adjustment part 1 is composed of two pieces It is composed of an adjusting piece 11 that is symmetrical along its vertical midline, and the arc direction of the left adjusting piece 11 and the right adjusting piece 11 is the up-down direction. When worn, the back of the head squeezes the adjusting piece 11 to expand it in the up-down direction, and after expansion, it will exert an elastic force in the opposite direction to further adapt to the head circumference. By providing a groove with an opening facing downward in the middle of the adjusting portion 1, the left adjusting piece 11 and the right adjusting piece 11 can be expanded up and down while extending to both sides below the back of the head, further improving the adjustment range of the adjusting portion 1 to adapt to different head circumferences.

[0028] like Figure 1 As shown, the left adjustment piece 11 and the right adjustment piece 11 are both provided with a through hole 12 facing the head direction. The purpose of providing the through hole 12 is to reduce costs and to reduce stress concentration by opening the hole, thereby improving the strength of the adjustment part 1 to a certain extent.

[0029] Furthermore, Figure 1 As shown, the groove is in an inverted "V" shape. When the left adjustment piece 11 and the right adjustment piece 11 are extended up and down, the "V"-shaped groove can increase the extension range of the two adjustment pieces 11 to further adapt to the head circumference.

[0030] Furthermore, if Figure 1 As shown, there are two through holes 12 on the left adjustment piece 11 or the right adjustment piece 11 in the upper and lower directions, and the side length of the upper through hole 12 in the vertical direction is smaller than that of the lower through hole 12, wherein,

[0031] The length direction of the upper through hole 12 is arranged along the left-right direction; the length direction of the lower through hole 12 is arranged along the up-down direction, and the upper side length of the lower through hole 12 is greater than the lower side length;

[0032] The through hole 12 on the left adjusting piece 11 and the through hole 12 on the right adjusting piece 11 are arranged symmetrically with each other.

[0033] In this embodiment, the cross-sections of the left adjusting piece 11 and the through hole 12 above the right adjusting piece 11 are approximately rectangular, and their shapes are matched with the left and right arc surfaces of the adjusting part 1 as a whole. When worn, the adjusting part 1 extends left and right, generating bending stress. By setting the through hole 12 in the extension direction, the strength can be improved, and material fatigue leading to poor reset effect can be avoided; similarly, the shapes of the through holes 12 below the left adjusting piece 11 and the right adjusting piece 11 are matched with the upper and lower arc surfaces of the adjusting piece 11. When worn, the left adjusting piece 11 and the right adjusting piece 11 extend up and down, generating bending stress. The strength can be improved by opening.

[0034] like Figure 1 As shown, the connecting part 2 is provided with corrugated grooves in the front and back directions. When worn, the connecting part 2 needs to withstand repeated extrusion and reset. The provision of corrugated grooves can improve the fatigue strength of the material and increase the service life, thereby preventing the connecting part 2 from becoming fatigued due to long-term repeated extrusion, resulting in failure of elastic reset and affecting the use of the adjustment structure.

[0035] Furthermore, the corners of the adjusting portion 1 and the internal through hole 12 are chamfered. Example

[0036] See also Figure 1-2 Based on Example 1, the present application also provides a helmet 3, wherein the adjustment portion 1 is fixed to the inner wall of the helmet 3 through the connecting portion 2.

[0037] The adjusting portion 1 is fixed to the rear end or the front end of the inner wall of the helmet 3 through the connecting portion 2 .

[0038] like Figure 2 As shown, further, the fixing methods of the connecting portion 2 and the inner wall of the helmet 3 include but are not limited to bolt connection, bonding, integral molding or snap fixation.

[0039] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clarifying the present invention and are not intended to limit the implementation methods of the present invention. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A helmet head circumference adjustment structure, characterized by: The adjusting portion includes an integrally formed adjusting portion and a connecting portion. The overall shape of the adjusting portion is an arc-shaped portion facing the head, and the arc direction is the left and right direction. The adjusting portion is composed of two adjusting pieces symmetrical along its vertical midline. The shapes of the left adjusting piece and the right adjusting piece are both arc-shaped portions facing the head, and the arc direction is the up and down direction. A groove with an opening facing downward is provided in the middle of the adjusting portion.

2. The helmet head circumference adjustment structure according to claim 1, characterized in that: The left adjusting piece and the right adjusting piece are both provided with through holes facing the head direction.

3. The helmet head circumference adjustment structure according to claim 2, characterized in that: The groove is in the shape of an inverted "V".

4. The helmet head circumference adjustment structure according to claim 3, characterized in that: There are two through holes on the left adjustment piece or the right adjustment piece in the upper and lower directions, and the side length of the upper through hole in the vertical direction is smaller than that of the lower through hole, wherein, The length direction of the upper through hole is arranged along the left-right direction; the length direction of the lower through hole is arranged along the up-down direction, and the upper side length of the lower through hole is greater than the lower side length; The through holes on the left adjusting piece and the through holes on the right adjusting piece are arranged symmetrically.

5. The helmet head circumference adjustment structure according to claim 1, characterized in that: The connecting portion is provided with corrugated grooves in the front and rear directions.

6. The helmet head circumference adjustment structure according to any one of claims 1 to 5, characterized in that: The edges and corners of the adjusting portion and the internal through hole are chamfered.

7. A helmet comprising the helmet head circumference adjustment structure according to any one of claims 1 to 6, characterized in that: The adjusting portion is fixed on the inner wall of the helmet through the connecting portion.

8. The helmet according to claim 7, characterized in that The adjusting portion is fixed to the rear end or the front end of the inner wall of the helmet through the connecting portion.

9. The helmet according to claim 8, characterized in that The fixing methods of the connecting portion and the inner wall of the helmet include but are not limited to bolt connection, bonding, integral molding or snap fixing.

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