WO2023214720A1

WO2023214720A1 - Rotation mechanism for helmet

Info

Publication number: WO2023214720A1
Application number: PCT/KR2023/005522
Authority: WO
Inventors: 김성광; 조정현
Original assignee: (주)에이치제이씨
Priority date: 2022-05-02
Filing date: 2023-04-24
Publication date: 2023-11-09
Also published as: KR20230154649A; KR102646629B1

Abstract

The present invention relates to a rotation mechanism for a helmet, and the rotation mechanism for a helmet according to the present invention is provided in a helmet comprising a helmet main body (10), a chin guard (20) which is rotatable with respect to the helmet main body (10), and a shield (30) which is rotatable with respect to the helmet main body (10), wherein the shield (30) is rotatably coupled to the chin guard (20), and when the chin guard (20) is rotated to an open position when the shield (30) is in an open position, the shield (30) is rotated within a predetermined angle with respect to the helmet main body (10) while being guided by a guiding portion (100) of the helmet main body (10).

Description

Rotation mechanism for helmet

The present invention relates to a pivoting mechanism for a helmet.

In general, it is essential to wear a helmet to protect the wearer's head when riding a two-wheeled vehicle at high speeds. This helmet has an opening at the front to secure the wearer's front view. At this time, the opening may be provided with a shield that can be selectively opened and closed to block wind and dust flowing in during operation. In addition, the helmet according to the prior art is provided with a chin guard to protect the wearer's chin, as disclosed in the patent document of the prior art document below.

[Prior art literature]

[Patent Document]

(Patent Document 1) KR10-2014-0001141 A

One aspect of the present invention is that in a state where the shield is rotatably coupled to the pro-guard, when the shield is in the open position and the pro-guard is rotated to the open position, the shield is guided by the guide portion of the helmet main body and is positioned in a predetermined position with respect to the helmet main body. This relates to a rotation mechanism for a helmet that rotates only within an angle.

A rotation mechanism for a helmet according to an embodiment of the present invention is provided in a helmet including a helmet body, a chin guard rotatable with respect to the helmet body, and a shield rotatable with respect to the helmet body, wherein the shield is attached to the chin guard. It is rotatably coupled, and when the chin guard is rotated to the open position when the shield is in the open position, the shield is guided by the guide portion of the helmet body and rotated within a predetermined angle with respect to the helmet body.

Additionally, in the rotation mechanism for a helmet according to an embodiment of the present invention, the shield moves along the guide unit and includes a control unit that controls rotation of the shield.

Additionally, in the rotation mechanism for a helmet according to an embodiment of the present invention, the guide portion is formed as a step in the ratchet portion of the helmet body, and the control portion contacts the step and moves along the step.

Additionally, in the rotation mechanism for a helmet according to an embodiment of the present invention, the guide portion includes a first guide portion extending upward while going rearward, and a second guide portion extending downward toward the rear from an end of the first guide portion. , and a third guide part extending rearward from the end of the second guide part, wherein the control unit controls the first guide part and the second guide when the pro guard is rotated to the open position when the shield is in the open position. The unit and the third guide unit are moved in that order.

Additionally, in the rotation mechanism for a helmet according to an embodiment of the present invention, the guide part includes a fourth guide part extending downward, and the control unit moves along the fourth guide part when the shield is rotated to the closed position. do.

In addition, in the rotation mechanism for a helmet according to an embodiment of the present invention, the control unit passes through a guide hole formed in the chin guard, recessed grooves are formed at both ends of the guide hole, and unevenness is formed between both ends of the guide hole. is formed, and a force is applied to the control unit in one direction, so that when the control unit is disposed at both ends of the guide hole, the control unit is coupled to the groove portion, and when the control unit is disposed between both ends of the guide hole, the control unit is connected to the groove portion. It comes into contact with uneven areas.

In addition, in the rotation mechanism for a helmet according to an embodiment of the present invention, the chin guard is rotatably coupled to a ratchet portion of the helmet body, two pro guard guide portions are formed on the ratchet portion, and two pro guard guide portions are provided. At least one of the guide parts extends from the front to the rear, and the parent guard is formed with two connection parts that move along the two parent guard guide parts. When the parent guard is rotated, the two connection parts moves along the two pro-guard guide parts.

Additionally, in the rotation mechanism for a helmet according to an embodiment of the present invention, when the pro-guard is rotated to the open position when the shield is in the open position, the pro-guard is coupled to the shield, and then the pro-guard is in the closed position. When rotated, the shield is rotated to the closed position.

Additionally, in the rotation mechanism for a helmet according to an embodiment of the present invention, a first fastening portion is formed on one of the pro-guard and the shield, and the other one of the pro-guard and the shield is fastened with the first fastening portion. A second fastening portion is formed.

In addition, in the rotation mechanism for a helmet according to an embodiment of the present invention, the first fastening part includes a first protrusion formed to protrude in the direction of the second fastening part, and the first protrusion is connected to any of the pro guard and the shield. It includes a rotating part that is rotatably coupled to one another, and the second fastening part includes a second protrusion formed to protrude in the direction of the first fastening part.

Additionally, in the rotation mechanism for a helmet according to an embodiment of the present invention, the first fastening part further includes an elastic part that provides elastic force so that the first protrusion rotates in the direction of the second fastening part.

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, in a state where the shield is rotatably coupled to the pro-guard, when the shield is in the open position and the pro-guard is rotated to the open position, the shield is guided by the guide portion of the helmet main body and is positioned at a predetermined angle with respect to the helmet main body. It has the advantage of being able to meet only within a short period of time.

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

2 to 12 are side views showing the operation process of the rotation mechanism for a helmet according to an embodiment of the present invention;

13 to 15 are side views showing the operation process of the shield of the rotation mechanism for a helmet according to an embodiment of the present invention, and

Figures 16 and 17 are cross-sectional views showing the operation process of the first and second fastening parts of the rotation mechanism for a helmet 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.

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

Figure 1 is an exploded perspective view of a helmet rotation mechanism according to an embodiment of the present invention, and Figures 2 to 12 are side views showing the operation process of the helmet rotation mechanism according to an embodiment of the present invention.

As shown in FIGS. 1 to 12, the rotation mechanism for the helmet according to the present embodiment includes the helmet body 10, the chin guard 20 rotatable with respect to the helmet body 10, and the helmet body 10. It is provided in a helmet including a rotatable shield 30, and the shield 30 is rotatably coupled to the pro-guard 20, and when the shield 30 is in the open position, the pro-guard 20 is in the open position. When rotated, the shield 30 is guided by the guide portion 100 of the helmet body 10 and rotates within a predetermined angle with respect to the helmet body 10.

Basically, the helmet body 10 serves to protect the wearer's head. This helmet body 10 may be made of a material capable of absorbing shock. For example, the helmet body 10 includes an outer shell that is made of hard synthetic resin and has high strength, and an absorber disposed inside the outer shell that is made of expanded polystyrene (EPS) or the like and has appropriate strength and elasticity. It can be included. A pad, etc. may be provided inside such an absorber to improve wearing comfort.

In addition, the chin guard (20) serves to protect the wearer's chin, and may be extended in an arc shape so that it can be placed in front of the wearer's chin as a whole. At this time, both ends of the chin guard 20 are rotatably coupled to the ratchet portion 40 provided on both sides of the helmet body 10, so that it rotates with respect to the helmet body 10 and can be rotated from the closed position to the open position. . For example, the closed position means when the chin guard 20 is placed in front of the wearer's chin (see FIG. 2, the chin guard 20 is closed), and the open position means when the chin guard 20 is positioned in front of the helmet body ( 10) (see FIG. 8, the pro guard 20 is open).

And, the shield 30 serves to open and close the opening 13 formed in the front of the helmet body 10. At this time, both ends of the shield 30 are rotatably coupled to the auxiliary ratchet portion 50 provided on both sides of the chin guard 20, so that it rotates with respect to the helmet body 10 and closes the opening portion 13. It can be rotated from this position to the open position where the opening portion 13 is opened. For example, the closed position means when the shield 30 is placed in the open part 13 (see FIG. 2, shield 30 closed), and the open position means when the shield 30 is placed in the open part 13. This may mean when placed upward (see FIG. 4, shield 30 opened).

On the other hand, two pro-guard guide parts (41, 43) extending in an arc shape are formed in the ratchet part (40), and two pro-guard guide parts (41, 43) that move along the two pro-guard guide parts (41, 43) are formed in the pro-guard (20).

Connection portions

21 and 23 may be formed. Accordingly, when the parent guard 20 is rotated, the two

connection parts

21 and 23 can move along the two parent

guard guide parts

41 and 43. For example, the two

connection parts

21 and 23 may be protrusions protruding from the inner surface of the parent guard 20, and the two parent

guard guide parts

41 and 43 have an arc shape along the ratchet part 40. It may be a slit extending in the shape of a slit. Specifically, at least one of the two parent

guard guide portions

41 and 43 extends from the front to the rear, so that as the parent guard 20 rotates, at least one of the two connecting

portions

21 and 23 One connection portion 23 moves rearward along at least one pro-guard guide portion 43 of the two

pro-guard guide portions

41 and 43. Therefore, the pro-guard 20 does not rotate with respect to the helmet body 10 around one axis, but as the pro-guard 20 rotates, its relative position with respect to the helmet main body 10 may be moved (e.g. , the chin guard 20 can be moved rearward compared to when it is rotated around one axis).

Since the shield 30 is rotatably coupled to the auxiliary ratchet portion 50 of the parent guard 20, when the parent guard 20 is rotated from the closed position to the open position when the shield 30 is in the open position, the shield ( There is a risk that 30) will meet excessively depending on the meeting of the pro-guard (20). However, in the helmet rotation mechanism according to this embodiment, when the chin guard 20 is rotated from the closed position to the open position, the shield 30 is guided by the guide portion 100 of the helmet body 10, so that the helmet It can be rotated only within a predetermined angle with respect to the main body 10.

Here, the guide part 100 is formed on the ratchet part 40 of the helmet body 10, and the shield 30 moves along the guide part 100 when the chin guard 20 is rotated and the shield 30 It may include a control unit 200 that controls the rotation of . For example, the guide portion 100 may be formed as a step on the ratchet portion 40 of the helmet body 10. Specifically, the step may be defined by the side wall of the recessed portion 45 (see FIG. 1) formed to be recessed into the ratchet portion 40. Additionally, the control unit 200 of the shield 30 is in contact with the step (guide unit 100) and can be moved along the step (guide unit 100) when the parent guard 20 is rotated. For example, the control unit 200 may be formed as a protruding pin protruding from the inside of both ends of the shield 30. At this time, the control unit 200 passes through the guide hole 53 formed to extend in an arc shape in the auxiliary ratchet part 50 of the parent guard 20 and passes through the step formed in the ratchet part 40 (guide part 100 )) can be contacted.

More specifically, the guide unit 100 may include first, second, and

third guide units

110, 120, and 130. Here, the first guide portion 110 may extend upward toward the rear, and the second guide portion 120 may extend downward from the end of the first guide portion 110 toward the rear. For example, the first guide part 110 may extend obliquely upward toward the rear, and the second guide portion 120 may extend obliquely downward toward the rear. Additionally, the third guide part 130 may extend rearward from the end of the second guide part 120. For example, the third guide portion 130 may extend in an arc shape protruding upward. Here, when the shield 30 is in the open position and the parent guard 20 is rotated from the closed position to the open position, the control unit 200 operates the first guide part 110, the second guide part 120, and the third guide part 110. It is moved according to the guide unit 130 in order, and specific details regarding this will be described later. Additionally, the guide unit 100 may include a fourth guide unit 140. Here, the fourth guide part 140 is disposed lower than the first, second, and

third guide parts

110, 120, and 130, and may extend downward. For example, the fourth guide portion 140 may extend in an arc shape protruding forward. Here, when the shield 30 is rotated from the open position to the closed position together with the parent guard 20, the control unit 200 moves along the fourth guide unit 140, and details regarding this will be described later.

Specifically, as shown in FIGS. 2 to 4, when the shield 30 is rotated from the closed position to the open position, the control unit 200 of the shield 30 operates the arc-shaped extending guide hole 53 and the chin guard ( It can be moved along the auxiliary ratchet portion 50 of 20). For example, when the shield 30 is in the closed position (see FIG. 2), the control unit 200 of the shield 30 is disposed at the bottom of the guide hole 53, and when the shield 30 is in the open position ( 4), the control unit 200 of the shield 30 may be placed at the top of the guide hole 53. By moving the control unit 200 of the shield 30 only to both ends of the guide hole 53 of the auxiliary ratchet unit 50, the rotation range of the shield 30 with respect to the parent guard 20 can be limited to a predetermined range. . Meanwhile, when the shield 30 is rotated to the open position (see FIG. 4), the control unit 200 of the shield 30 may be arranged to be spaced a predetermined distance lower from the front end of the first guide unit 110.

Next, as shown in FIGS. 5 and 6, when the shield 30 is in the open position and the pro guard 20 is rotated from the closed position to the open position, the pro guard 20 and the shield 30 are moved together. While rotating, the control unit 200 of the shield 30 is placed at the front end of the first guide unit 110, and then the control unit 200 of the shield 30 is guided by contacting the first guide unit 110, It may be moved from the front end of the first guide part 110 to the rear end. Since the first guide portion 110 extends upward toward the rear, the shield 30 including the control portion 200 guided by the first guide portion 110 extends upward toward the rear with respect to the helmet body 10. can be moved to At this time, since the rotation amount of the parent guard 20 is greater than the rotation amount of the shield 30, the gap between the shield 30 and the parent guard 20 can be narrowed. Additionally, the control unit 200 of the shield 30 may be moved a predetermined distance from the top to the bottom of the guide hole 53 of the auxiliary ratchet unit 50.

Next, as shown in FIGS. 6 and 7, when the shield 30 is in the open position and the pro guard 20 is further rotated to the open position, the control unit 200 of the shield 30 operates the second guide. While being guided by contacting the part 120, it can be moved from the front end of the second guide part 120 to the rear end. Since the second guide portion 120 extends downward toward the rear, the shield 30 including the control portion 200 guided by the second guide portion 120 extends downward toward the rear with respect to the helmet body 10. can be moved to At this time, since the rotation amount of the parent guard 20 is greater than the rotation amount of the shield 30, the gap between the shield 30 and the parent guard 20 can be further narrowed. Additionally, the control unit 200 of the shield 30 may be moved a predetermined distance back toward the bottom of the guide hole 53 of the auxiliary ratchet unit 50.

Next, as shown in FIG. 8, when the shield 30 is in the open position and the pro guard 20 is rotated to the open position, the control unit 200 of the shield 30 contacts the third guide unit 130. As it is guided, it can be moved from the front end of the third guide to the rear end. Since the third guide part 130 extends rearward, the shield 30 including the control part 200 guided by the third guide part 130 can be moved rearward with respect to the helmet body 10. At this time, since the rotation amount of the parent guard 20 is greater than the rotation amount of the shield 30, the parent guard 20 can be coupled to the shield 30. Additionally, the control unit 200 of the shield 30 may be placed at the bottom of the guide hole 53 of the auxiliary ratchet unit 50.

Ultimately, when the shield 30 is in the open position and the chin guard 20 is rotated to the open position, the control unit 200 of the shield 30 is guided to the guide unit 100, and the shield 30 is guided to the helmet body ( 10), it cannot be rotated excessively and can only be rotated within a certain angle.

In addition, as described above, when the pro-guard 20 is rotated, the pro-guard 20 does not rotate with respect to the helmet main body 10 around one axis, so its position relative to the helmet main body 10 moves. As shown in FIGS. 5 to 8, the shield 30 coupled to the parent guard 20 is guided by the guide portion 100 of the ratchet portion 40 and responds to the movement of the parent guard 20. Thus, it can be moved relative to the helmet body 10.

Meanwhile, as shown in FIGS. 9 to 12, after the parent guard 20 is coupled to the shield 30, when the parent guard 20 is rotated from the open position to the closed position, the parent guard 20 coupled with the parent guard 20 As the shield 30 is also rotated from the open position to the closed position, the control unit 200 of the shield 30 is spaced apart from the third guide unit 130 (see FIG. 9) and then contacts the fourth guide unit 140. While being guided, it can be moved from the top to the bottom of the fourth guide part 140 (see FIGS. 10 to 12). Since the fourth guide part 140 extends downward, the shield 30 including the control part 200 guided by the fourth guide part 140 can be moved downward with respect to the helmet body 10. At this time, since the shield 30 is coupled with the parent guard 20 and rotates together, the control unit 200 of the shield 30 maintains its position at the bottom of the guide hole 53 of the auxiliary ratchet unit 50. .

Meanwhile, let us look in detail at the structure in which the shield 30 is rotatably coupled to the auxiliary ratchet portion 50 of the chin guard 20. As shown in FIG. 1, the shield 30 may include a rotation axis 31 and a second guide 33. Additionally, the auxiliary ratchet portion 50 of the chin guard 20 may be provided with a moving portion 55 that acts elastically toward the rear. Here, the rotation axis 31 protrudes from the inside of the shield 30, is rotatably coupled to the auxiliary ratchet part 50, and can be pressed backward by the moving part 55. In addition, the second guide 33 protrudes from the inside of the shield 30 and moves along the arc-shaped first guide 57 formed on the moving part 55 of the auxiliary ratchet part 50. can be combined with As described above, since elasticity acts backward on the moving part 55, a force is applied backward to the shield 30 through the rotation axis 31 pressed by the moving part 55, and as a result, the shield 30 ) is also applied backward to the control unit 200. At this time, as shown in FIGS. 13 to 15,

grooves

53a and 53b recessed backward are formed at both ends (top and bottom) of the guide hole 53 formed in the auxiliary ratchet portion 50, respectively, An uneven portion 53c may be formed between both ends (top and bottom) of the guide hole 53. As described above, force is applied backward to the control unit 200 of the shield 30, so when the control unit 200 is placed at the top or bottom of the guide hole 53 (see FIGS. 13 and 14), the control unit 200 (200) is coupled to the groove portions (53a, 53b) to prevent the shield (30) from rotating arbitrarily. In addition, since force is applied backward to the control unit 200 of the shield 30, when the control unit 200 is placed between the upper and lower ends of the guide hole 53 (see FIG. 15), the control unit 200 has irregularities. By contacting the portion 53c, a clicking sensation can be provided when the shield 30 is rotated.

As described above, when the parent guard 20 is rotated to the open position when the shield 30 is in the open position, the parent guard 20 is coupled to the shield 30, and then the parent guard 20 is moved to the closed position. When rotated, the shield 30 can also be rotated to the closed position (see FIGS. 9 to 12). Here, in order to couple the parent guard 20 to the shield 30, a first fastening part 300 and a second fastening part 400 may be provided, as shown in FIG. 16. At this time, the first fastening part 300 may be formed above the center of the parent guard 20, and the second fastening part 400, which is fastened to the first fastening part 300, may be formed on the lower center of the shield 30. can be formed. Specifically, the first fastening part 300 includes a first protrusion 310 protruding in the direction of the second fastening part 400, and a rotating part that rotatably couples the first protrusion 310 to the parent guard 20. 320 , and an elastic part 330 that provides elastic force so that the first protrusion 310 rotates in the direction of the second fastening part 400 . At this time, one end of the elastic part 330 is in contact with the first protrusion 310, and in order to support the other end of the elastic part 330, the parent guard 20 is provided with a support part 25 that supports the elastic part 330. can be combined. Additionally, the second fastening part 400 may include a second protrusion 410 that protrudes in the direction of the first fastening part 300. Therefore, when the parent guard 20 is coupled to the shield 30, if the second protrusion 410 of the second fastening part 400 contacts the first protrusion 310 of the first fastening part 300 ( Referring to (b) of FIG. 16), as the elastic portion 330 is compressed, the first protrusion 310 may be rotated in the inner direction of the parent guard 20 around the rotating portion 320. Thereafter, when the second protrusion 410 of the second fastening part 400 is disposed at the lower end of the first protrusion 310 of the first fastening part 300 (see (c) of FIG. 16), the compressed elastic portion As the first protrusion 310 rotates in the direction of the shield 30 due to the elastic force of 330, the second protrusion 410 and the first protrusion 310 may be coupled. In this way, the second protrusion 410 of the second fastening part 400 is coupled with the first protrusion 310 of the first fastening part 300, so that the parent guard 20 can be coupled to the shield 30. there is.

Meanwhile, as shown in FIG. 17, in a state where the second protrusion 410 of the second fastening part 400 and the first protrusion 310 of the first fastening part 300 are coupled, the wearer uses the shield 30 ) is rotated upward, the second protrusion 410 and the first protrusion 310 are inclinedly coupled to each other, so the second protrusion 410 pushes the first protrusion 310 in the inner direction of the parent guard 20. You can. At this time, the first protrusion 310 is rotated in the inner direction of the parent guard 20 around the rotating portion 320, so that the first protrusion 310 may be separated from the second protrusion 410. Ultimately, when the parent guard 20 is coupled to the shield 30 and the wearer rotates the shield 30 upward, the shield 30 can be naturally separated from the parent guard 20.

In the above description, it has been described that the first fastening part 300 is formed in the parent guard 20 and the second fastening part 400 is formed in the shield 30, but the scope of the present invention is necessarily limited thereto. Rather, the first fastening part 300 may be formed on the shield 30 and the second fastening part 400 may be formed on the parent guard 20.

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]

10: Helmet body 13: Opening part

20: Chin guard 21, 23: Connection part

25: support 30: shield

31: rotation axis 33: second guide

40: Ratchet part 41, 43: Chin guard guide part

50: Auxiliary ratchet part 53: Guide hole

53a, 53b: groove portion 53c: uneven portion

55: moving part 57: first guide

100: guide part 110: first guide part

120: second guide part 130: third guide part

140: fourth guide unit 200: control unit

300: first fastening portion 310: first protrusion

320: rotating part 330: elastic part

400: second fastening portion 410: second protrusion

In the present invention, in a state in which the shield is rotatably coupled to the pro-guard, when the shield is in the open position and the pro-guard is rotated to the open position, the shield is guided by the guide part of the helmet main body and is only positioned within a predetermined angle with respect to the helmet main body. A pivoting mechanism for a pivotable helmet is provided.

Claims

A rotation mechanism for a helmet provided in a helmet including a helmet body, a chin guard rotatable with respect to the helmet body, and a shield rotatable with respect to the helmet body,

The shield is rotatably coupled to the parent guard,

When the shield is in the open position and the chin guard is rotated to the open position, the shield is guided by a guide portion of the helmet body and rotated within a predetermined angle with respect to the helmet body.
In claim 1,

The shield is,

a control unit that moves along the guide unit and controls rotation of the shield;

A pivoting mechanism for a helmet comprising:
In claim 2,

The guide portion is formed as a step on the ratchet portion of the helmet body,

A rotation mechanism for a helmet in which the control unit contacts the step and moves along the step.
In claim 2,

The guide part,

A first guide portion extending upward toward the rear;

a second guide portion extending downward and rearward from the end of the first guide portion; and

a third guide portion extending rearward from the end of the second guide portion;

Including,

The control unit is a rotation mechanism for a helmet that moves the first guide part, the second guide part, and the third guide part in order when the chin guard is rotated to the open position when the shield is in the open position.
In claim 2,

The guide part,

a fourth guide portion extending downward;

Including,

The control unit is a rotation mechanism for a helmet that moves along the fourth guide unit when the shield is rotated to the closed position.
In claim 2,

The control unit passes through a guide hole formed in the chin guard,

Recessed grooves are formed at both ends of the guide hole, and uneven portions are formed between both ends of the guide hole,

A force is applied to the control unit in one direction, so that when the control unit is placed at both ends of the guide hole, the control unit is coupled to the groove part, and when the control unit is placed between both ends of the guide hole, the control unit contacts the concavo-convex part. A rotating mechanism for a helmet.
In claim 1,

The chin guard is rotatably coupled to the ratchet portion of the helmet body,

Two parent guard guide portions are formed on the ratchet portion, and at least one of the two parent guard guide portions extends from the front to the rear,

The parent guard is formed with two connecting portions that move along the two parent guard guide portions,

A rotation mechanism for a helmet in which when the chin guard is rotated, the two connecting parts are moved along the two chin guard guide parts.
In claim 1,

A rotation mechanism for a helmet wherein when the pro-guard is rotated to the open position when the shield is in the open position, the pro-guard is coupled to the shield, and then when the pro-guard is rotated to the closed position, the shield is rotated to the closed position.
In claim 8,

A first fastening portion is formed in one of the parent guard and the shield,

A rotation mechanism for a helmet in which a second fastening part that is fastened to the first fastening part is formed on the other one of the chin guard and the shield.
In claim 9,

The first fastening part,

a first protrusion formed to protrude in the direction of the second fastening part; and

a pivoting portion rotatably coupling the first protrusion to one of the parent guard and the shield;

Including,

The second fastening part,

a second protrusion formed to protrude in the direction of the first fastening part;

A pivoting mechanism for a helmet comprising:
In claim 10,

The first fastening part,

an elastic portion that provides elastic force so that the first protrusion rotates in the direction of the second fastening portion;

A rotation mechanism for a helmet further comprising: