WO2007144938A1

WO2007144938A1 - Shield installation structure for helmet

Info

Publication number: WO2007144938A1
Application number: PCT/JP2006/311811
Authority: WO
Inventors: Takeshi Murakami
Original assignee: Ogk Kabuto Co., Ltd.
Priority date: 2006-06-13
Filing date: 2006-06-13
Publication date: 2007-12-21
Also published as: JPWO2007144938A1; CN101448418B; JP4839373B2; CN101448418A

Abstract

A shield installation structure for a helmet, which enables a shield to be quickly and easily attached to and detached from the helmet and which facilitates assembly of the helmet to reduce costs. The shield installation structure has rotation support sections (5) arranged on both left and right sides of a helmet body (2), and also has rotation sections (6) arranged on both left and right sides of the shield (3). The shield (3) can be disengaged from the helmet body (2) by lifting it up to an open position and pulling it out obliquely upward and forward from the helmet body (2). Further, the disengaged shield (3) can be engaged with the helmet body (2) by pushing in the shield obliquely downward and backward toward the helmet body (2). The shield (3) has unlock operation sections (8), and the left and right rotation sections (6) and rotation support sections (5) can be switched over from the engaged state to the disengaged state only when the unlock operation sections (8) are kept pushed.

Description

Specification

Helmet shield mounting structure

Technical field

The present invention relates to a shield mounting structure for a helmet.

Background art

[0002] In a full face type of helmet, etc., a shield is usually attached so as to open and close a balance opening provided in front of the helmet body. This scenery can be easily attached to and detached from the helmet body so that it can be exchanged when insects and pebbles are damaged by scratches and dirt, or when the color or design is changed. It has a structure.

[0003] As a conventional mounting structure, a rotation support portion is provided on both the left and right sides of the helmet body, and a rotation portion that engages with the left and right rotation support portions is provided at the left and right ends of the shield. The pivot support part and the pivot part can be separated by the operation of pulling the left and right ends of the shield away from the helmet body outward in the left-right direction and the left and right sides of the shield in the separated state. It is known that both ends can be engaged by pushing inward in the left-right direction (opposite left-right direction) toward the hermet body (see, for example, Patent Document 1).

[0004] By the way, the rotating support part and the rotating part are engaged so that the shield does not come off during normal use (such as driving) while wearing a helmet. However, in order to remove the lock in the conventional mounting structure, the lock operation knob is pushed down along the outer surface of the helmet body. The operation knob was attached to the helmet body so that it could move up and down.

Patent Document 1: Japanese Patent Publication No. 7-35601

Disclosure of the invention

Problems to be solved by the invention

[0005] To remove the shield from the helmet body as described above, pull the both ends of the shield to the left and right sides while pressing down the operation knob. Unless it was made to separate, the rotation part could not be detached from the rotation support part. In this case, the operator who operates the operation knob to release the lock (up and down direction) and the direction in which the left and right ends of the shield are pulled out of the hermet body (left and right direction) are completely different. It is very unnatural that the finger that operated the operation knob is attached to the body of the helmet (without lifting the finger of the body of the body), and the entire hand holding the left and right ends of the shield is pulled away from the left and right. And unreasonable movement (movement that spreads fingers of the same hand in a complicated and large crotch) is required. As a result, it was very difficult to attach and remove the shield.

[0006] In addition, due to the provision of the operation knob, a structure having a large number of parts, such as a coil spring for biasing and holding the operation knob to the unoperated position, must be used, and the assembly is troublesome and the production cost is low. There was a drawback of high cost.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a helmet shield mounting structure in which a shield can be attached and detached quickly and easily. Another object of the present invention is to provide a shield mounting structure for a helmet that is easy to assemble as a helmet and can be manufactured at a low cost.

Means for solving the problem

In order to achieve the above object, the present invention has taken the following measures.

That is, the helmet shield mounting structure according to the present invention is provided with the rotation support portions on the left and right sides of the helmet body, and the shield covering the front of the helmet is rotated with respect to the left and right rotation support portions at the left and right ends. A rotating part is provided that engages while maintaining a movable state, and the rotating support part and the rotating part can be freely engaged and disengaged. Relative to the helmet part, the shield can be removed by pulling the shield forward and diagonally upward from the helmet body with the shield flipped up to the open position with respect to the helmet body, and the shield in the separated state can be removed. Guide means that can be engaged by pushing backward and downward toward the back is provided, and the shield is provided with the left and right rotating parts and the rotating support part only when the shield is continuously pressed. Disengage from engaged state Unlock operation unit that can be switched to the state is provided.

[0008] Thus, in the present invention, the shield jumps up to the open position with respect to the helmet body. The shield that is in the raised state can be detached by pulling the shield in the flipped-up state upward and diagonally upward, and the shield in the separated state is directed toward the helmet body. The operation is performed in such a direction that it can be engaged by pushing backward and obliquely downward.

[0009] The unlock operation unit is provided with respect to the shield, and the unlock operation unit is separated from the rotation support unit and the rotation unit by a push operation, that is, in an engaged state. Can be unlocked.

For this reason, when removing the shield from the helmet body, the operator first raises the shield to the open position, then attaches left and right hands to the left and right ends of the shield, and uses the fingers of the left and right hands to It is only necessary to push the unlock operation part and pull out the shield diagonally upward and forward of the helmet body.

At this time, the hand attached to the shield and the finger pressing the unlocking operation part are operated to separate the Helmet body force. For this reason, the operator can attach and detach the shield with a very natural movement rather than requiring an unnatural movement, such as opening the fingers in a complicated and large crotch.

[0010] The unlock operation unit is cantilevered by two parallel slits (including not only parallel but also non-parallel) and a slit connecting part that connects one end of both slits. It is preferable that a strip-like elastic tongue piece is formed and a button bulging on the outer surface side of the shield is provided near the slit connecting portion of the elastic tongue piece.

With such a structure, the unlock operation section can be simplified and can be assembled easily. In addition, since the elastic tongue itself has a self-returning force (elastic force) when it is not operated, there is no need for a return panel and the number of parts can be reduced. Therefore, low cost can be achieved.

[0011] It is preferable that the button of the unlock operation unit is positioned in the vicinity of the rotation unit and is eccentric from the center of rotation of the rotation unit and the rotation support unit.

In this way, it is possible to use the shield so that it cannot be attached or detached unless the shield is flipped up to the open position with respect to the helmet body. In other words, since the position of the shield attachment / detachment operation can be restricted, the shield must be removed by mistake. It leads to prevention.

[0012] The button is bulged and formed as a flow surface that can reduce the air resistance received by the frontal force when the shield is lowered to the closed position with respect to the helmet body. In the state where the shield is flipped up to the open position, it is preferable that the shield is formed into an arrow shape that instructs the direction of attaching and detaching the shield with respect to the hermet body.

This makes it possible to reduce or eliminate wind noise while using the shield in a closed state (when wearing a helmet and driving an motorcycle, etc.), and to prevent the shield from rattling. is there. In addition, since the position where the button is formed can be understood from the direction indicated by the arrow shape, the attachment / detachment position of the shield, the orientation of the shield, and the like can be understood.

[0013] Preferably, the shield is formed by coupling the shield body and the unlock operation part which is a separate part from each other.

That is, the unlock operation part is made as a separate part, which makes it easy to manufacture the unlock operation part. In addition, if only the unlocking operation part is damaged or only the shield body is damaged, only those parts can be replaced individually, so that the maintenance cost can be reduced.

The invention's effect

[0014] With the shield mounting structure for a helmet according to the present invention, the shield can be attached and detached quickly and easily. In addition, assembling as a helmet is easy and low cost is achieved.

Brief Description of Drawings

FIG. 1 is a side view showing an embodiment of a helmet comprising a shield mounting structure according to the present invention.

FIG. 2 is a side view showing the process of removing the shield from the helmet body.

[FIG. 3A] FIG. 3A is a side view showing a rotation support portion provided in the helmet body.

[FIG. 3B] FIG. 3B is a cross-sectional view taken along line A— in FIG. 3A.

[Fig. 4Α] Fig. 4Α is a side view showing the rotating part provided on the shield from the inside of the shield. The

[FIG. 4B] FIG. 4B is a BB line arrow view in FIG. 4A.

[FIG. 4C] FIG. 4C is a view taken along the line CC in FIG. 4A.

[FIG. 5A] FIG. 5A is a side view of the engaged state of the rotation support portion and the rotation portion.

FIG. 5B is a side view showing a state in the middle of engagement / disengagement between the rotation support portion and the rotation portion.

[FIG. 5C] FIG. 5C is a side view of the detachment state of the rotation support portion and the rotation portion.

Explanation of symbols

[0016] 1 Helmet

2 HEREME

3 Shield

5 Rotating support

6 Rotating part

8 Unlock operation section

27 Guide means

42 Slit

43 Slit connection

44 Elastic tongue

45 button

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 5C show an embodiment of a helmet 1 having a shield mounting structure according to the present invention. As shown in FIGS. 1 and 2, the helmet 1 has a helmet body 2 and a shield 3 that covers the front surface of the helmet body 2. The shield 3 is made of, for example, a transparent or colored transparent resin containing carbon such as polycarbonate, or a transparent resin subjected to a treatment such as a half mirror or a magic mirror.

[0018] Rotating support portions 5 are provided on both the left and right sides of the helmet body 2, and the left and right ends of the shield 3 are engaged with the left and right rotating support portions 5 while maintaining a rotatable state. The moving part 6 is provided, and in the engaged state between the rotating support part 5 and the rotating part 6, the helmet The shield 3 can be flipped up against the main body 2 to open the front of the helmet, or the shield 3 can be lowered and lowered to close the front of the helmet.

The helmette body 2 of the present embodiment is a full face type, and is provided with a jaw guard portion 2a on the front surface, thereby forming a balance opening 7 which becomes an independent opening. The opening 7 for opening and closing is opened and closed by raising and lowering the shield 3.

[0019] The rotation support portion 5 and the rotation portion 6 can be freely engaged and disengaged as necessary. When the shield 3 is scratched or dirty, or when the color or design is changed, the shield 3 Can be exchanged freely. For this reason, the shield 3 is provided with an unlocking operation section 8 which is operated at the time of replacement.

In the shield mounting structure according to the present invention, the replacement of the shield 3 is limited to be performed after the shield 3 is flipped up to the helmet body 2 to the open position. The direction in which the shield 3 is removed from the helmet 2 (that is, the direction in which the pivot 6 is removed from the pivot support 5) is the direction in which the shield 3 is pulled forward and obliquely upward from the helmet 2, and the helmet body. The direction in which the shield 3 is attached to 2 (that is, the direction in which the rotary part 6 is engaged with the rotary support part 5) is the direction in which the shield 3 in the separated state is pushed backward and obliquely downward toward the hermet body 2. It is as.

[0020] As shown in FIGS. 3A and 3B, the rotation support portion 5 has a boss portion 10 that protrudes in a short cylindrical shape on the outer surface of the helmet body 2, and a diameter from the protruding end portion of the boss portion 10. The outer flange 11 that protrudes outward in the direction, the locking tongue 12 extending along the predetermined radial direction from the center of the boss 10, and the center of the boss 10 to the tip of the locking tongue 12. It has a locking continuation wall 13 extending in a circular arc shape upward from the locking tongue 12 with a radius.

In this embodiment, the rotation support portion 5 is formed integrally with a base board 14 formed as a separate part from the helmet body 2, and the base board 14 has a circular central portion of the boss portion 10. Insert the mounting screw 17 (shown only in Fig. 2) into the screw mounting part 15 provided in a recessed manner, or the screw mounting part 16 provided at a position away from the boss 10 downward, and fix it to the helmet body 2 It is as a structure.

[0021] The outer flange portion 11 is not provided on the entire circumference of the boss portion 10. As described above, the direction line (the center of the boss portion 10) This is referred to as “detachable axis P” (see also Figure 2), and one pair (two) is provided so that it can be distributed on both sides.

The locking tongue piece 12 is connected to the screw mounting portion 14 in the boss portion 10 with the boss portion 10 side as the root, and both sides and the tip side in the extending direction are free. It is elastically deformable like a plate panel along the protruding direction (cylinder axis direction).

The locking continuation wall 13 is provided integrally with the base board 14, and unlike the locking tongue piece 12, elastic deformation is not allowed. The base board 14 is formed with curved grooves 18 having a predetermined width so as to face the tip of the locking tongue 12 and the locking continuation wall 13. The movement restriction wall 19 is formed. The operation of the rotation restricting wall 19 will be described later.

On the other hand, as shown in FIG. 4A (view of one end side of the shield 3 as seen from the inside), the rotating portion 6 includes a housing portion 20 protruding in a rib shape on the inner surface of the shield 3, and a protruding end portion of the housing portion 20 An inner flange portion 21 projecting radially inward from the center, and a locking piece 22 protruding from the inner surface of the shield 3 at a position away from the center of the housing portion 20 in a predetermined radial direction.

[0023] The housing portion 20 includes a curved portion 20a corresponding to a semicircular circumference and straight portions 20b extending in parallel with each other at both ends of the curved portion 20a, and the center of the force curve portion 20a formed in a horseshoe shape. The part is divided into two parts. As a result, a combination (half) of a half of the curved part 20a and a straight part 20b on one side is provided in a symmetrical arrangement.

The housing part 20 is arranged so that the entire horseshoe shape is inclined so that the straight part 20b is parallel to the detachable axis P. The inner diameter of the curved portion 20a and the distance between the straight portions 20b (dimension indicated by D in FIG. 4C) are formed so that the two outer flange portions 11 of the rotation support portion 5 can be fitted together without backlash. The inner method (the dimension indicated by d in FIG. 4C) of the inner flange portions 21 on both sides is formed such that the boss portion 10 of the rotation support portion 5 can be fitted outside without rattling.

[0024] The locking piece 22 is disposed on the detachable axis P, and the boss portion 10 and the outer flange portion 11 of the rotation support portion 5 are fitted inside the curved portions 20a of the housing portion 20. Sometimes it is positioned and projected to engage the tip of the locking tongue 12.

Therefore, when the housing part 20 (curved part 20a) and the inner flange part 21 of the rotating part 6 are fitted to the boss part 10 and the outer flange part 11 of the rotating support part 5, the rotating part 6 rotates. Supporting part 5 and the rotating portion 6 are guided in a freely rotatable manner, and the engagement and locking tongue 12 of the outer flange portion 11 of the rotating support portion 5 and the inner flange portion 21 of the rotating portion 6 are provided. In addition, the jointed action of the engagement retaining wall 13 and the engagement piece 22 keeps the external fitting state of the rotation support portion 5 and the rotation portion 6 (prevents disengagement). Yes.

[0025] It should be noted that the base plate 14 forming the rotation support portion 5 is provided with a peripheral wall 25 so as to surround the boss portion 10, and a peripheral groove 26 is provided between the boss portion 10 and the peripheral wall 25. Is starting to form. The circumferential groove 26 is in a state where both side portions are opened in a direction along the detachable axis P, and the housing portion 20 of the rotating portion 6 can be slid in and out by this opened portion. In other words, the circumferential groove 26 regulates the engagement / disengagement direction of the rotation part 6 with respect to the rotation support part 5 between the boss part 20 of the rotation support part 5 and the housing part 20 of the rotation part 6. The guide means 27 for doing so is formed.

Further, the rotation support portion 5 is provided with a plate panel portion 30 which is bridged in an arch shape on the outer side (the outer peripheral surface side of the base panel 14) further than the peripheral wall 25 described above. On the other hand, a positioning protrusion 31 protruding in a semicircular shape is provided. Therefore, the positioning projection 31 receives a panel force from the plate panel portion 30 and generates an elastic backup operation along the radial direction of the boss portion 10.

[0026] On the other hand, in the rotating part 6, the housing part 20 (curved part 20a) of the rotating part 6 is externally fitted to the boss part 10 of the rotating support part 5 so that both can freely rotate. The angle setting rib 32 is provided so as to be positioned along the circumferential movement locus of the positioning protrusion 31 of the rotation support portion 5. The angle setting rib 32 is formed by corrugating a plurality of semicircular positioning recesses 32a that can be easily engaged with and disengaged from the semicircular shape of the positioning protrusion 31 and can be easily engaged and disengaged with this. .

Therefore, when the housing part 20 of the rotating part 6 rotates relative to the boss part 10 of the rotating support part 5, the positioning projection 31 of the rotating part 6 rotates while receiving the elastic backup action of the leaf spring 30. With respect to the angle setting rib 32 of the support portion 5, it moves while being fitted in each positioning recess 32 a or getting over the adjacent position, and a positioning state can be obtained in each positioning recess 32 a. As a result, the jumping angle (opening) of the shield 3 relative to the helmet body 2 can be adjusted appropriately. In addition, when the housing part 20 of the rotating part 6 rotates with respect to the boss part 10 of the rotating support part 5, a curve provided on the base board 14 of the rotating support part 5 is provided. The force that causes the locking piece 22 provided on the rotating part 6 to move in an arc in the groove 18 opens and closes the shield 3 when the locking piece 22 contacts the rotation limiting walls 19 at both ends of the curved groove 18. It will be regulated by contact. The upper limit on the open side is the state where the shield 3 is attached to and detached from the helmet body 2, and the state where the shield opening 3 is fully closed on the shield 3 is the lower limit on the closed side. It is said that.

As described above, the unlocking operation portion 8 provided for the shield 3 (see FIG. 4A) can be detached from the rotation support portion 5 and the rotation portion 6, that is, unlocked from the engaged state. The left and right rotating parts 6 and the left and right rotating support parts 5 are moved from the engaged state to the disengaged state only when the unlocking operation part 8 is continuously pressed. Enable switching.

[0028] In the present embodiment, the unlock operation unit 8 is formed as a separate part based on the small plate 40, and then coupled to the shield body 41, so that the shield 3 is formed as a whole. did. This makes it easier to manufacture and lower the cost of the unlocking operation unit 8, and enables individual replacement when the unlocking operation unit 8 or the shield body 41 is damaged. It is. The housing part 20 and the locking piece 22 of the rotating part 6 are also provided on the plate 40.

The unlock operation part 8 is a strip-like shape surrounded by two parallel slits 42 with respect to the plate 40 and a slit connecting part 43 that connects one end parts of both slits 42 in a cantilever manner. An elastic tongue piece 44 is formed, and a button 45 bulging on the outer surface side of the shield is provided near the slit connecting portion 43 of the elastic tongue piece 44.

[0029] The two slits 42 are provided as straight lines parallel to the detachable axis P at equal positions on both sides of the detachable axis P as a center. The positional relationship is such that it passes through the center of relative rotation. The slit connecting portion 43 is provided so as to connect the slits 42 with a semi-elliptical curve. It should be noted that the two slits 42 are straight lines, parallel to each other, and that the slit connecting portion 43 is a semi-elliptical curve is merely an example, and is not particularly limited. Absent. The button 45 is formed in a teardrop shape with a semi-elliptical curve formed by the S-slit connecting part 43 at the bottom, and the vicinity of the slit connecting part 43 bulges to the lowest level. It has become. From this shape, the operator is prompted to push and operate this most bulged part.

[0030] Because of this, the elastic tongue 44 overlaps the locking tongue 12 of the rotation support portion 5 only when the shield 3 is flipped up to the open position with respect to the helmet body 2. . At this time, a locking piece 22 is engaged with the locking tongue piece 12. Therefore, if the button 45 is pressed and operated in this state, the elastic tongue 44 is squeezed and deformed, and the back surface on the tip side presses the locking tongue 12. The engagement with the stop piece 22 is released. Therefore, the shield 3 can be pulled out forward and obliquely upward of the helmet body 2 while the button 45 is pressed.

It should be noted that when the button 45 is pressed, the elastic tongue piece 44 is effectively deformed so that the engagement between the locking tongue piece 12 and the locking piece 22 can be reliably released. For this purpose, the elastic tongue 44 is provided with an operation protrusion 46 that protrudes behind the button 45.

[0031] The button 45 is formed to bulge with the teardrop-shaped shape described above, and the elastic tongue piece 44 provided with the button 45 is formed in parallel with the detachable axis P. Accordingly, as shown in FIG. 1, the button 45 swells as a flow surface shape that can reduce the air resistance received from the front when the shield 3 is lowered to the closed position with respect to the helmet body 2. It will be formed. At the same time, this button 45 is formed as an arrow that indicates the direction in which the shield 3 is attached to and detached from the helmet body 2 when the shield 3 is flipped up to the open position with respect to the helmet body 2. Will be.

In addition, although the button 45 is in the vicinity of the rotation unit 6, the button 45 and the rotation support unit 5 are positioned eccentrically from the center of rotation.

As is clear from the above detailed description, in the shield mounting structure of the present invention having the above-described configuration, the sheathed 3 is attached to and detached from the helmet body 2 in a state of being flipped up to the open position. Yes, it can be detached by pulling the shield 3 in the raised state from the helmet body 2 diagonally forward and upward, and the shield 3 in the separated state toward the helmet body 2 obliquely backward and downward. Engageable by pushing in It is supposed to be done in the direction.

As shown in the order of Fig. 5A, Fig. 5B, Fig. 5C, when removing the shield 3 from the helmet body 2, the operator must first force the shield 3 to jump up to the open position. The direction of the shield 3 and the like can be easily understood by the direction in which the button 45 is formed and the direction force indicated by the arrow shape.

[0033] Next, the operator attaches left and right hands to the left and right ends of the shield 3, presses each unlocking operation portion 8 with the fingers of the left and right hands, and directly moves the shield 3 to the front of the helmet body 2. You only have to pull it upward. At this time, the hand attached to the shield 3 and the unlocking operation portion 8 are pushed and operated, and the fingers are moved away from the helmet body 2 together.

For this reason, the operator can attach and detach the shield 3 with a very natural movement rather than requiring an unnatural movement such as opening a finger in a complicated and large crotch.

If the shield 3 is not flipped up to the open position with respect to the helmet body 2, the elastic tongue 44 does not coincide with the locking tongue 12 when the button 45 is pressed, and the locking continuation wall 13 Therefore, the restrained state of the engagement with the locking piece 22 is not released. Therefore, the shield 3 cannot be attached or detached, and the shield 3 can be prevented from being removed by an erroneous operation.

[0034] On the other hand, as shown in the order of FIG. 5C, FIG. 5B, and FIG. 5A, when attaching the shield 3 in the separated state to the helmet body 2, the operator points the shield 3 toward the helmet body 2. It is only necessary to push it backward and obliquely downward. Even at this time, the operator can easily understand the position of the shield 3 and the direction of the shield 3 from the position where the button 45 is formed and the direction force indicated by the arrow.

When used with the shield 3 closed (when driving a motorcycle, etc. wearing the helmet 1), the button 45 has the flow surface shape to reduce or eliminate wind noise. Will be. In addition, the backlash of the shield 3 is prevented.

By the way, the present invention is not limited to the above-described embodiment, but can be appropriately changed according to the embodiment.

For example, the outer shape and cross-sectional structure of helmet 1 are not limited at all. Or a jet type.

Industrial applicability

The shield mounting structure of the helmet according to the present invention is suitable for use in a helmet for protecting a head of an occupant of a motorcycle, a bicycle, a racing car or the like. An effect is obtained.

Claims

The scope of the claims

[1] Rotating support parts (5) are provided on the left and right sides of the helmet body (2), and the left and right rotating support parts (5) are attached to the left and right ends of the shield (3) covering the front of the helmet. A rotating part (6) that holds and engages with a rotatable state is provided, and the rotating support part (5) and the rotating part (6) can be freely engaged and disengaged. The shield (3) is moved to the open position with respect to the helmet body (2) between the pivot support (5) and the pivot (6). When the shield (3) is flipped up, the shield (3) can be removed by pulling it forward diagonally upward, and the shield (3) in the separated state is tilted backwards downward toward the helmet (2). Guide means (27) is provided that can be engaged by pushing in,

The shield (3) has an unlocking operation part that can switch the left and right turning parts (6) and the turning support part (5) from the engaged state to the detached state only when they are continuously pressed. (8) Helmet shield mounting structure characterized by being provided.

[2] The unlocking operation part (8) is cantilevered by two parallel slits (42) and a slit connecting part (43) that connects one ends of both slits (42). A strip-shaped elastic tongue piece (44) is formed, and a shield (3) button (45) that bulges on the outer surface side is provided near the slit connecting portion (43) of the elastic tongue piece (44). The shield mounting structure for a helmet according to claim 1, wherein the shield mounting structure is provided.

[3] The button (45) of the unlocking operation part (8) is in the vicinity of the turning part (6) and the turning part.

3. The shield mounting structure for a helmet according to claim 2, wherein (6) and the rotation support portion (5) are positioned eccentrically from the center of relative rotation.

[4] The button (45) is bulged and formed as a flow surface that can reduce the air resistance received from the front when the shield (3) is lowered to the closed position with respect to the helmet body (2). In the state where the shield (3) is flipped up to the open position with respect to the helmet body (2), the arrow shape indicates the direction of attaching and detaching the shield (3) to the helmet body (2). 4. The shield mounting structure for a helmet according to claim 2 or 3, wherein the shield mounting structure is formed as follows.

[5] The shield (3) is an unlock operation part (8) separated from the shield body. The shield mounting structure for a helmet according to any one of claims 1 to 4, wherein the shield mounting structure is formed by joining together.