WO2023224281A1

WO2023224281A1 - Helmet buckle

Info

Publication number: WO2023224281A1
Application number: PCT/KR2023/005526
Authority: WO
Inventors: 임형욱
Original assignee: (주) 에이치제이씨
Priority date: 2022-05-20
Filing date: 2023-04-24
Publication date: 2023-11-23
Also published as: KR102685017B1; KR20230162416A

Abstract

The present invention relates to a helmet buckle. The helmet buckle according to the present invention comprises: a base part (100) for guiding a band part (400) to slide when the band part (400) advances or retreats; a locking part (200) rotatably coupled to the base part (100), and fastened to the band part (400); and an operating part (300) which is rotatably coupled to the base part (100), and which rotates the locking part (200) so as to separate the locking part (200) from the band part (400) if the operating part rotates at at least a predetermined angle with respect to the base part (100).

Description

buckle for helmet

The present invention relates to a buckle for a helmet.

Helmet buckles are used in sports helmets, including motorcycle helmets and ski helmets, and are a device used to fasten/disconnect or adjust the length of a band provided on a helmet. At this time, the helmet buckle must not only be firmly fixed when fastening the band, but also must be easy for the user to operate when fastening/disconnecting or adjusting the length.

As disclosed in the patent document of the prior art document below, the buckle according to the prior art presses the hook of the male buckle 120 when the elastic portion 114 is pressed, thereby fastening the female buckle 110 and the male buckle 120. It is released. However, since the fastening is released by simply pressing the impact portion 114, there is a problem that the fastening of the buckle may be released due to a malfunction while driving a motorcycle or performing sports such as skiing, which may cause an accident.

[Prior art literature]

[Patent Document]

(Patent Document 1) KR 10-1629928 B1

One aspect of the present invention is to solve the above-described problem, and is to provide a buckle for a helmet that separates the locking portion from the band portion by rotating the operating portion to rotate the locking portion when the operating portion is rotated beyond a predetermined angle.

A helmet buckle according to an embodiment of the present invention includes a base portion that guides the band portion to slide when the band portion enters or retreats, a locking portion rotatably coupled to the base portion and fastened to the band portion, and the base portion. It is rotatably coupled, and includes an operating part that rotates the locking part to separate the locking part from the band part when it is rotated at a predetermined angle or more with respect to the base part.

Additionally, in the helmet buckle according to an embodiment of the present invention, the locking portion has a first locking portion formed on one side, the operating portion has a second locking portion hooked to the first locking portion on one side, and the operating portion has the first locking portion formed on one side of the locking portion. While being rotated to a predetermined angle relative to the base portion, the first engaging portion and the second engaging portion are spaced apart, and when the operating portion is rotated more than a predetermined angle relative to the base portion, the second engaging portion is attached to the first engaging portion. It takes.

Additionally, in the buckle for a helmet according to an embodiment of the present invention, a predetermined space is formed on one side of the operating part, the second locking part is formed at a boundary of the predetermined space, and the operating part is inclined at a predetermined angle with respect to the base part. While being rotated, the first locking portion moves relative to the operating portion within the predetermined space, and when the operating portion is rotated at a predetermined angle or more with respect to the base portion, the second locking portion is caught by the first locking portion.

Additionally, in the helmet buckle according to an embodiment of the present invention, the predetermined space is formed in a depression recessed on a side of the operation unit, and the second locking part is formed as a step formed at a boundary of the depression.

Additionally, in the helmet buckle according to an embodiment of the present invention, the first locking portion is formed in a plate shape and is disposed in the predetermined space.

Additionally, in the helmet buckle according to an embodiment of the present invention, the locking portion is rotatably coupled to the base portion, a fastening portion fastened to the band portion, and a first hook protruding in one direction from both sides of the fastening portion. The operating unit includes a recessed part formed on both sides of the operating part, and a second locking part is formed by a step formed at a boundary of the recessed part.

Additionally, in the buckle for a helmet according to an embodiment of the present invention, while the operating portion is rotated to a predetermined angle with respect to the base portion, the first engaging portion is moved with respect to the operating portion within the recessed portion, and the operating portion is moved relative to the operating portion. When the unit is rotated more than a predetermined angle with respect to the base portion, the second locking portion is caught by the first locking portion.

Additionally, in the helmet buckle according to an embodiment of the present invention, the locking portion is rotatably coupled to the base portion by a first rotating shaft, and the operating portion is rotatably coupled to the base portion by a second rotating shaft. They are coupled, and the second pivot axis is farther from the first locking part and the second locking part than the first pivot axis.

Additionally, in the helmet buckle according to an embodiment of the present invention, before the operating unit is rotated with respect to the base unit, the operating unit presses the locking unit to fasten it to the band unit.

Additionally, in the helmet buckle according to an embodiment of the present invention, the locking portion has a first locking portion formed on one side, the operating portion has a third locking portion hooked to the first locking portion on one side, and the operating portion has the Before being rotated with respect to the base portion, the third locking portion is caught by the first locking portion.

Additionally, in the helmet buckle according to an embodiment of the present invention, a predetermined space is formed on one side of the operating part, and the third engaging part is formed at a boundary of the predetermined space.

Additionally, in the helmet buckle according to an embodiment of the present invention, the predetermined space is formed in a depression recessed on a side of the operation unit, and the third locking portion is formed as a step formed at a boundary of the depression.

In addition, in the buckle for a helmet according to an embodiment of the present invention, the base portion includes a bottom extending in a plate shape and a pair extending from both sides of the bottom so that the locking portion is rotatably coupled to one side, and the locking portion is rotatably coupled to the other side. It includes a partition wall coupled to the operating unit so that it can rotate.

Additionally, in the helmet buckle according to an embodiment of the present invention, the operating portion is made of anodized aluminum.

Additionally, in the helmet buckle according to an embodiment of the present invention, the base portion extends in a curved line.

Additionally, in the helmet buckle according to an embodiment of the present invention, the operating unit further includes elastic means for providing elastic force in the direction of the band portion.

Additionally, in the helmet buckle according to an embodiment of the present invention, the elastic means is a torsion spring, one end of the torsion spring is coupled to the operating unit, and the other end of the torsion spring rotates the locking unit to the base. It is supported on a first rotation axis that enables coupling.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, terms or words used in this specification and claims should not be interpreted in their usual, dictionary meaning, and the inventor may appropriately define the concept of the term in order to explain his or her invention in the best way. It must be interpreted with meaning and concept consistent with the technical idea of the present invention based on the principle that it is.

According to the present invention, when the operating unit is rotated beyond a predetermined angle, the operating unit rotates the locking unit to separate the locking unit from the band unit, thereby preventing the locking unit and the band unit from being released due to malfunction.

1 is a perspective view of a buckle for a helmet according to an embodiment of the present invention;

Figure 2 is an exploded perspective view of a buckle for a helmet according to an embodiment of the present invention;

3 to 6 are cross-sectional views showing the operation process of the helmet buckle according to an embodiment of the present invention, and

Figures 7a to 7c are plan views showing the initial fastening process of a helmet buckle according to an embodiment of the present invention.

The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In this specification, when adding reference numbers to components in each drawing, it should be noted that identical components are given the same number as much as possible even if they are shown in different drawings. Additionally, terms such as “first” and “second” are used to distinguish one component from another component, and the components are not limited by these terms. Hereinafter, in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of the present invention will be omitted.

Basically, the helmet buckle according to the embodiment of the present invention is employed in sports helmets including motorcycle helmets and ski helmets, and is a device used for fastening/disconnecting or adjusting the length of a band provided on a helmet.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

Figure 1 is a perspective view of a helmet buckle according to an embodiment of the present invention, and Figure 2 is an exploded perspective view of a helmet buckle according to an embodiment of the present invention.

As shown in Figures 1 and 2, the buckle for a helmet according to an embodiment of the present invention includes a base part 100 that guides the band part 400 to slide when the band part 400 enters or retreats, and a base part 100. ), and is rotatably coupled to the locking portion 200, which is fastened to the band portion 400, and the base portion 100, and when rotated more than a predetermined angle with respect to the base portion 100, the locking portion ( It includes an operating unit 300 that rotates the 200 to separate the locking unit 200 from the band unit 400.

The base portion 100 guides the band portion 400 to slide when the band portion 400 enters or retreats, and serves to support the locking portion 200 and the operating portion 300. Here, the base portion 100 may include a bottom portion 110 and a pair of partition walls 120. At this time, the bottom portion 110 extends in a plate shape to correspond to the band portion 400, and the partition wall 120 may extend from both sides (longitudinal edges) of the bottom portion 110 so that a pair faces each other. In this partition 120, a locking part 200 is rotatably coupled to one side (an area far from the side into which the band part 400 enters), and an operating part is attached to the other side (an area close to the side into which the band part 400 enters). (300) is coupled so that it can be rotated. More specifically, a first rotation shaft 220 is coupled to one side of the partition wall 120, and the locking unit 200 can be rotatably coupled to the base portion 100 by the first rotation shaft 220. . Additionally, a second rotation shaft 340 is coupled to the other side of the partition wall 120, so that the operating unit 300 can be rotatably coupled to the base portion 100 by the second rotation shaft 340.

Additionally, the base portion 100 is connected to a band or belt and mounted on the helmet. For this purpose, a connection portion 130 to which the band or belt is connected may be formed. Here, the connection part 130 may be formed to extend from the end of the partition 120 (an end opposite to the direction in which the band part 400 enters) in a direction away from the operation part 300 (downward direction).

Meanwhile, the base portion 100 and the bottom portion 110 are extended in a curved line with a curvature to correspond to the shape of the wearer's chin, thereby improving the feeling of discomfort when worn. Additionally, since the base portion 100 is in direct contact with the wearer, it may be made of, for example, SS316 stainless steel, which is harmless to the human body, but is not necessarily limited thereto.

The locking part 200 is fastened to the band part 400 and serves to fix the band part 400. As described above, the locking unit 200 may be rotatably coupled to the base unit 100 by the first rotating shaft 220. Here, the locking part 200 is arranged to be spaced apart from the bottom part 110 of the base part 100 at a certain distance (see FIG. 3), so the space between the bottom part 110 of the base part 100 and the locking part 200 Through this, the band portion 400 can enter or retreat. As shown in FIG. 2, the locking portion 200 may have a first locking portion 210 formed on one side. Specifically, the locking part 200 may include a fastening part 205 and a first locking part 210. Here, the fastening part 205 is fastened to the band part 400 and can be rotatably coupled to the base part 100 by the first rotation axis 220. At this time, a second uneven part 230 is formed on one surface (lower surface) of the fastening part 205, and the second uneven part 230 is coupled to the first uneven part 410 formed on the band part 400, thereby fastening. Part 205 may be fastened to the band part 400. In addition, the first locking portion 210 protrudes from both sides of the operating portion 300 in one direction (a direction away from the first rotation axis 220 or an entering direction of the band portion 400), and the operating portion 300 It functions to control the fastening part 205 by being caught on the second locking part 310 or the third locking part 320. For example, the first locking part 210 may be formed in a plate shape and placed in the recessed parts 335 formed on both sides of the operating part 300. Here, the third locking part 320 of the operating part 300 is caught on the first locking part 210, and the locking part 200 is fastened to the band part 400, or according to the rotation of the operating part 300. The second locking portion 310 of the operating unit 300 may be caught on the first locking portion 210, and the fastening portion 205 may be separated from the band portion 400. Details regarding this will be described later.

The operating unit 300 rotates the locking unit 200 to separate the locking unit 200 from the band unit 400. As described above, the operating unit 300 may be rotatably coupled to the base unit 100 by the second rotating shaft 340. Here, when the operating unit 300 is rotated more than a predetermined angle with respect to the base unit 100, the locking unit 200 can be rotated to separate the locking unit 200 from the band unit 400.

Specifically, the operating unit 300 may have a second locking portion 310 formed on one side that is caught by the first locking portion 210 of the locking portion 200. As shown in FIGS. 3 and 4, while the operation unit 300 is rotated to a predetermined angle with respect to the base unit 100, the first locking unit 210 and the operation unit 300 of the locking unit 200 The second locking portion 310 is spaced apart. Accordingly, while the operating unit 300 is rotated to a predetermined angle with respect to the base unit 100, the locking unit 200 is not rotated. However, as shown in FIGS. 5 and 6, when the operating unit 300 is rotated more than a predetermined angle with respect to the base unit 100, the operating unit 300 is attached to the first engaging portion 210 of the locking unit 200. ) of the second locking portion 310 is caught. Accordingly, when the operating unit 300 is rotated more than a predetermined angle with respect to the base unit 100, the locking unit 200 rotates together with the operating unit 300 and may be separated from the band unit 400. Ultimately, only when the operating unit 300 is rotated more than a predetermined angle with respect to the base unit 100, the locking unit 200 is rotated to separate the locking unit 200 from the band unit 400, thereby preventing malfunction of the locking unit ( It is possible to prevent the connection between 200) and the band portion 400 from being released.

More specifically, as shown in FIG. 2, a predetermined space 330 is formed on one side of the operating unit 300, and the second locking part 310 may be formed at the boundary of the predetermined space 330. For example, the predetermined space 330 of the operation unit 300 may be formed in the depression 335 formed on the side (both sides) of the operation unit 300, and the second locking portion of the operation unit 300 ( 310 may be formed as a step 337 formed at the boundary of the depression 335. Additionally, the first engaging portion 210 formed in a plate shape may be disposed in a predetermined space 330 or recessed portion 335 of the operating portion 300. Accordingly, while the operating unit 300 is rotated to a predetermined angle with respect to the base unit 100 (see FIGS. 3 and 4), the first locking unit 210 is positioned within the predetermined space 330 and depression 335. By moving relative to the operating unit 300, the locking unit 200 does not rotate. However, when the operating unit 300 is rotated more than a predetermined angle with respect to the base unit 100 (see FIGS. 5 and 6), the first locking part 210 of the locking unit 200 is attached to the operating unit 300. 2 When the locking portion 310 (step 337 formed at the boundary of the recessed portion 335) is caught, the locking portion 200 rotates together with the operating portion 300 and may be separated from the band portion 400. Meanwhile, the predetermined angle at which the operating unit 300 is rotated (malfunction prevention section where the locking unit 200 is not rotated) is not particularly limited, but may be, for example, 10° to 30°, and after the predetermined angle, The maximum angle at which the operation unit 300 is rotated (the operation section at which the lock unit 200 is rotated) is not particularly limited, but may be, for example, 35° to 50°.

Meanwhile, the locking unit 200 is rotatably coupled to the base unit 100 by the first rotation axis 220, and the operating unit 300 is coupled to the base unit 100 by the second rotation axis 340. They are rotatably coupled, and the second pivot axis 340 is farther from the first and

second locking portions

210 and 310 than the first pivot shaft 220. Therefore, since the distance from the second rotation axis 340 of the operating unit 300 to the catching area is greater than the distance from the first rotating axis 220 of the locking unit 200 to the catching area, the operating unit 300 The amount of rotation is larger than the amount of rotation of the locking unit 200. In this way, since the rotation amount of the operating unit 300 is greater than the rotation amount of the locking unit 200, the possibility of a malfunction occurring in the locking unit 200 while the wearer operates the operating unit 300 can be reduced. .

Additionally, as shown in FIG. 3, the operating unit 300 may perform the function of pressing the locking unit 200 and fastening it to the band unit 400. Before the operating unit 300 is rotated with respect to the base unit 100, the locking unit 200 may be pressed in the direction of the band unit 400 by the elastic force of the elastic means 500. When the locking unit 200 is pressed by the operating unit 300, the first uneven part 410 of the band part 400 and the second uneven part 230 of the locking part 200 are coupled, and the locking part 200 ) may be fastened to the vent portion 400.

Specifically, the operating unit 300 may have a third engaging portion 320 formed on one side that is caught by the first engaging portion 210 of the locking portion 200. Here, before the operating unit 300 is rotated with respect to the base unit 100, the third engaging part 320 may be caught on the first engaging part 210. Accordingly, before the operation unit 300 is rotated with respect to the base unit 100, the operation unit 300 presses the locking unit 200, thereby fastening the locking unit 200 to the band unit 400.

More specifically, as shown in FIG. 2, a predetermined space 330 is formed on one side of the operating unit 300, and the third locking part 320 may be formed at the boundary of the predetermined space 330. For example, the predetermined space 330 of the operating unit 300 may be formed in the recessed portion 335 formed on the side (both sides) of the operating unit 300, and the third engaging portion of the operating unit 300 ( 320 may be formed as a step 337 formed at the boundary of the depression 335. Additionally, the first engaging portion 210 formed in a plate shape may be disposed in a predetermined space 330 or recessed portion 335 of the operating portion 300. Therefore, before the operating unit 300 is rotated with respect to the base unit 100 (see FIG. 3), the third engaging unit 320 of the operating unit 300 is attached to the first engaging unit 210 of the locking unit 200. , the step 337 formed at the boundary of the depression 335 is caught, so that the operation unit 300 can press the locking unit 200 to fasten the locking unit 200 to the band unit 400.

Meanwhile, as shown in FIG. 2, the second engaging portion 310 and the third engaging portion 320 are formed through one recessed portion 335 formed on the side (both sides) of the operating unit 300. You can. For example, the second locking portion 310 is formed by the step 337 formed at the lower border of the recessed portion 335 formed in the operating portion 300, and the recessed portion 335 formed in the operating portion 300 The third engaging portion 320 may be formed by the step 337 formed at the upper border. At this time, the first locking part 210 of the locking part 200 may be disposed in a predetermined space 330 between the second locking part 310 and the third locking part 320. Therefore, before the operating unit 300 is rotated with respect to the base unit 100 (see FIG. 3), the third engaging part of the operating unit 300 is placed on the upper side of the first engaging part 210 of the locking part 200. (320) may be caught, and if the operating part 300 is rotated more than a predetermined angle with respect to the base part 100 (see FIGS. 5 and 6), the second engaging part ( 310) may take.

Meanwhile, the operating unit 300 is not particularly limited, but may be formed of anodized aluminum. At this time, the operating unit 300 can implement a specific color (for example, red) through anodizing treatment.

Additionally, the operating unit 300 may be provided with elastic means 500 that provides elastic force in the direction of the band unit 400. For example, the elastic means 500 may be a torsion spring, and in this case, the cylindrical body of the torsion spring 500 has a second rotation shaft 340 that rotatably couples the operation unit 300 to the base unit 100. can be inserted into In addition, one end of the torsion spring 500 is coupled to the insertion groove 350 of the operating part 300, and the other end of the torsion spring 500 rotatably couples the locking part 200 to the base part 100. It may be supported on the first rotation axis 220. Accordingly, the other end of the torsion spring 500 is supported on the first rotation shaft 220, and a rotational force (elastic force) centered on the second rotation shaft 340 can be provided to the operation unit 300 through one end. .

In addition, a pulling means 600 may be provided at the end of the operating unit 300 so that the wearer can easily manipulate the operating unit 300 (see FIG. 1). Accordingly, the wearer can easily rotate the operation unit 300 with respect to the base unit 100 by pulling the pulling means 600.

Meanwhile, Figures 7A to 7C are plan views showing the initial fastening process of a helmet buckle according to an embodiment of the present invention. As shown in FIGS. 7A to 7C, among the irregularities of the first uneven portion 410 of the band portion 400, when the band portion 400 enters the base portion 100, the second uneven portion of the locking portion 200 When the band portion 400 of the second uneven portion 230 enters the base portion 100, the first concave region 413 that first meets the unevenness of the uneven portion 230 is connected to the locking portion 200. It is narrower than the first convex area 233 that first meets the unevenness of the first uneven portion 410 (W1<W2). In addition, among the irregularities of the second uneven portion 230, the first uneven region 413 is the second region that meets the irregularities of the first uneven portion 410 when the band portion 400 enters the base portion 100. It has the same width as the second iron region 235 (W1=W3) or is wider than the second iron region 235 (W1>W3). That is, the first convex region 413 disposed at the leading edge of the first uneven portion 410 is narrower than the first convex region 233 disposed at the leading edge of the second uneven portion 230 (W1< W2), has the same width as the second iron region 235 disposed after the first iron region 233 (W1=W3), or is wider than the second iron region 235 (W1>W3). Due to this configuration, the first convex region 233 is not fastened to the first concave region 413 (see FIG. 7B), and the second convex region 235 is fastened to the first concave region 413 (see FIG. see 7c). Therefore, the band portion 400 and the locking portion 200 are not fastened with only one yaw region and one convex region (see FIG. 7b), but at least two yaw regions and two convex regions are fastened (see FIG. 7c). , a firm connection can be achieved between the band portion 400 and the locking portion 200. At this time, the first concave region 413 is narrower than the first concave region 233 (W1<W2), has the same width as the second concave region 235 (W1=W3), or is the second concave region 233. In order to make the width wider than (235) (W1>W3), various configurations can be adopted. For example, to limit the width of the first concave region 413, protrusions 413a may protrude from both ends of the first concave region 413 in the width direction. However, this is an example and the scope of the present invention is not necessarily limited to the above configuration.

Although the present invention has been described in detail through specific examples, this is for detailed explanation of the present invention, and the present invention is not limited thereto, and can be understood by those skilled in the art within the technical spirit of the present invention. It is clear that modifications and improvements are possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

[Explanation of symbols]

100: base part 110: bottom part

120: bulkhead 130: connection part

200: locking part 205: fastening part

210: first engaging portion 220: first rotation axis

230: second concave-convex portion 233: first convex region

235: ferric iron area 300: operating unit

310: second engaging portion 320: third engaging portion

330: predetermined space 335: depression

337: Step 340: Second rotation axis

350: Insertion groove 400: Band portion

410: first concavo-convex portion 413: first concave region

413a: protrusion 500: elastic means

600: pulling means

One aspect of the present invention is to solve the above-described problem, and provides a buckle for a helmet that separates the locking portion from the band portion by rotating the operating portion to rotate the locking portion when the operating portion is rotated beyond a predetermined angle.

Claims

A base portion that guides the band portion to slide when the band portion enters or retreats;

a locking portion rotatably coupled to the base portion and fastened to the band portion; and

an operating unit rotatably coupled to the base unit and rotating the locking unit to separate the locking unit from the band unit when the base unit is rotated at a predetermined angle or more;

A buckle for a helmet containing a.
In claim 1,

The locking portion has a first locking portion formed on one side,

The operating unit is formed on one side with a second engaging portion that engages the first engaging portion,

While the operating unit is rotated to a predetermined angle with respect to the base unit, the first engaging portion and the second engaging portion are spaced apart,

A buckle for a helmet wherein the second locking portion is caught by the first locking portion when the operating portion is rotated at a predetermined angle or more with respect to the base portion.
In claim 2,

A predetermined space is formed on one side of the operating unit,

The second engaging portion is formed at a boundary of the predetermined space,

While the operation unit is rotated to a predetermined angle with respect to the base unit, the first locking unit is moved relative to the operation unit within the predetermined space,

A buckle for a helmet wherein the second locking portion is caught by the first locking portion when the operating portion is rotated at a predetermined angle or more with respect to the base portion.
In claim 3,

The predetermined space is formed in a depression recessed on a side of the operating unit,

A buckle for a helmet wherein the second locking portion is formed by a step formed at a boundary of the recessed portion.
In claim 3,

A buckle for a helmet wherein the first locking portion is formed in a plate shape and disposed in the predetermined space.
In claim 1,

The locking part,

a fastening portion rotatably coupled to the base portion and fastened to the band portion; and

a first locking portion protruding in one direction from both sides of the fastening portion;

Including,

A buckle for a helmet in which the operating unit has a recessed portion formed on both sides, and a second locking portion is formed by a step formed at a boundary of the recessed portion.
In claim 6,

While the operating portion is rotated to a predetermined angle relative to the base portion, the first locking portion is moved relative to the operating portion within the recessed portion,

A buckle for a helmet wherein the second locking portion is caught by the first locking portion when the operating portion is rotated at a predetermined angle or more with respect to the base portion.
In claim 2,

The locking portion is rotatably coupled to the base portion by a first rotating shaft,

The operating unit is rotatably coupled to the base unit by a second rotating shaft,

A buckle for a helmet in which the second rotation axis is farther from the first locking portion and the second locking portion than the first pivoting axis.
In claim 1,

A buckle for a helmet in which the operating unit presses the locking unit and fastens it to the band unit before the operating unit rotates with respect to the base unit.
In claim 9,

The locking portion has a first locking portion formed on one side,

The operating unit is formed on one side with a third engaging portion that engages the first engaging portion,

A buckle for a helmet wherein the third locking portion is caught on the first locking portion before the operating portion is rotated relative to the base portion.
In claim 10,

A predetermined space is formed on one side of the operating unit,

The third engaging portion is a helmet buckle formed at a boundary of the predetermined space.
In claim 11,

The predetermined space is formed in a depression recessed on a side of the operating unit,

A buckle for a helmet wherein the third locking portion is formed by a step formed at a boundary of the recessed portion.
In claim 11,

A buckle for a helmet wherein the first locking portion is formed in a plate shape and disposed in the predetermined space.
In claim 1,

The base part,

Bottom part extended in a plate shape; and

A pair of partition walls extend from both sides of the bottom so that the locking part is rotatably coupled to one side, and the operating part is rotatably coupled to the other side;

A buckle for a helmet containing a.
In claim 1,

Elastic means for providing elastic force to the operating unit in the direction of the band portion;

A buckle for a helmet further comprising:
In claim 15,

The elastic means is a torsion spring,

A buckle for a helmet wherein one end of the torsion spring is coupled to the operating unit, and the other end of the torsion spring is supported on a first rotation axis that rotatably couples the locking unit to the base.