JP2016138340A - Fitting structure of antifog sheet to shield - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability of holding members for holding an antifog sheet to a shield.SOLUTION: A recessed part 13 of which one end is opened to a head part 9a and the other end opened to an outer peripheral surface is formed on a main shaft 9 of a holding member 8, and a locking claw 15c is projectingly installed on the other end of a locking member 15 of which one end is connected to the head part 9a via a hinge part 14. Consequently, after the main shaft 9 is inserted into a support hole 7, when the locking member 15 is rotationally turned about the hinge part 14 and fitted into the recessed part 13, the locking claw 15c is projected from the outer peripheral surface of the main shaft 9 in the diametrically outward and engaged with the inner surface of a shield 3, so that the locking member 15 is supported in the support hole 7 so as not to fall. Further, when the main shaft 9 is inserted into the support hole 7, no stress is applied to the locking claw 15c so as to prevent deformation and breakage of the locking claw 15c, thereby improving durability of the holding member 8.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a structure for attaching an antifogging sheet to the inner surface of a shield mounted on a helmet or the like, and in particular, a plurality of seat portions formed on the peripheral edge portion of the antifogging sheet covering the inner surface of the shield, and these seat portions. A structure for attaching an antifogging sheet to a shield, comprising: a plurality of support holes provided in the shield at corresponding positions; and a plurality of holding members for holding the antifogging sheet by being seated on the seat while being supported by the support holes. Regarding improvements.

  Such a structure for attaching an antifogging sheet to a shield is known from the following Patent Document 1 relating to the application of the present applicant.

JP 2011-252258 A

  Patent Document 1 includes a holding member that holds an anti-fogging sheet on a shield, a main shaft that fits into a support hole of the shield, and an eccentric shaft that is eccentrically connected to the main shaft and integrally provided. The anti-fogging sheet is detachably fixed to the shield by rotating the main shaft fitted in the support hole by 180 ° and attaching the eccentric shaft to the seat portion of the anti-fogging sheet.

  At this time, the main shaft of the holding member is divided into a main shaft main portion connected to the eccentric shaft and an elastic piece connected to the main shaft main portion via a slit, and a locking claw is provided at the free end of the elastic piece, Is inserted into the support hole, the locking claw passes through the support hole due to elastic deformation of the elastic piece, and after passing through the support hole, the locking claw engages with the edge of the support hole by the elastic force of the elastic piece. Thus, the holding member can be supported by the shield so as not to drop off.

  However, since the holding member is a small member made of synthetic resin, if it is tilted when it is inserted into the support hole of the shield, it may deform or break due to excessive stress applied to the elastic piece of the main shaft was there.

  This invention is made | formed in view of the above-mentioned situation, and it aims at improving the durability of the holding member holding an anti-fogging sheet | seat in a shield.

  In order to achieve the above object, according to the first aspect of the present invention, a plurality of seat portions formed on the peripheral edge portion of the anti-fogging sheet covering the inner surface of the shield, and the corresponding positions of the seat portions, A plurality of support holes provided in the shield, and a plurality of holding members that hold the antifogging sheet by being seated on the seat portion while being supported by the support holes, and the holding members abut against the outer surface of the shield. A main shaft that has a head portion in contact with one end and is rotatably fitted in the support hole, and an eccentric having a smaller diameter than the main shaft that is eccentrically connected to the other end of the main shaft so as to be seated on the seat portion. Synthetic resin comprising a shaft and a massive end portion that is integrally connected to the outer end of the eccentric shaft and that defines an annular groove around the eccentric shaft in cooperation with the main shaft, and that can pass through the support hole. It is composed of a single part made of steel, the main shaft has one end open to the head and the other Forms a recess that opens toward the eccentric shaft, and a locking claw projects from a locking member having one end connected to the head via a hinge portion, and the locking member surrounds the hinge portion. The anti-fogging to the shield is characterized in that the locking claw protrudes radially outward from the outer peripheral surface of the main shaft so that the locking claw can come into contact with the inner surface of the shield when it is rotated and fitted into the recess. A seat mounting structure is proposed.

  According to the second aspect of the present invention, in addition to the configuration of the first aspect, in the state where the holding member is supported by the support hole, the head is in close contact with the outer surface of the shield and the holding is performed. The member prevents the member from falling into the support hole, and the head holds the shield in cooperation with the locking claw closely contacting the inner surface of the shield. A cloudy sheet mounting structure is proposed.

  According to the invention described in claim 3, in addition to the configuration of claim 1 or claim 2, the auxiliary locking claw that protrudes radially outward at a position opposite to the concave portion on the outer peripheral surface of the main shaft. A structure for attaching an anti-fogging sheet to the shield is proposed in which the protrusion amount of the auxiliary locking claw is made smaller than the protruding amount of the locking claw.

  According to the invention described in claim 4, in addition to the configuration of any one of claims 1 to 3, a small diameter portion is provided on the outer periphery directly below the head portion of the main shaft via a circumferential groove. A structure for attaching an antifogging sheet to a shield characterized by being formed is proposed.

  According to the invention described in claim 5, in addition to the configuration of any one of claims 1 to 4, a mark indicating an eccentric position of the eccentric shaft with respect to the main shaft is attached to the head. On the other hand, a structure for attaching an antifogging sheet to a shield is proposed, which is characterized in that a tool engaging portion is formed at the enormous end portion.

  According to the invention described in claim 6, in addition to the configuration of any one of claims 1 to 5, the shield is provided on the outer surface of the antifogging sheet so as to extend endlessly along the periphery thereof. A structure for attaching an antifogging sheet to a shield is provided, characterized in that a sealing member in close contact with the inner surface of the shield is provided to define a sealed gap surrounded by the sealing member between the shield and the antifogging sheet. .

  The mark protrusion 16 in the embodiment corresponds to the mark of the present invention.

  According to the configuration of the first aspect, the synthetic resin holding member is configured as an integrated single part from the head at one end to the enormous end at the other end, whereby the antifogging sheet can be attached to the shield. Therefore, an anti-fogging sheet mounting structure that is simple in structure and easy to mount can be provided at low cost. The holding member has a main shaft formed with a recess having one end opened to the head and the other end opened toward the eccentric shaft below the holding member, and one end connected to the head via a hinge portion. Since the locking claw protrudes from the other end of the shaft, when the locking member is turned around the hinge portion and inserted into the recess after the main shaft is inserted into the support hole, the locking claw is radial from the outer peripheral surface of the main shaft. By protruding outward and engaging the inner surface of the shield, the locking member can be supported in the support hole so as not to fall off. In addition, since stress is not applied to the locking claw when the main shaft is inserted into the support hole, deformation and breakage of the locking claw can be prevented and durability of the holding member can be enhanced. Further, since the main shaft and the locking member are integrated via the hinge portion, there is no possibility that the locking member is lost when the holding member is assembled to the shield.

  According to the second aspect of the present invention, the head is in close contact with the outer surface of the shield while the holding member is supported by the support hole, and the holding member is prevented from falling into the support hole. Since the shield holds the shield in cooperation with the locking claw that is in close contact with the inner surface of the shield, even if the shield receives an impact and stress is applied from the shield to the holding member, the stress is applied to the head and the locking claw. Dispersion prevents the holding member from being damaged.

  According to the third aspect of the present invention, the auxiliary locking claw protruding outward in the radial direction is provided at a position opposite to the other end of the concave portion on the outer peripheral surface of the main shaft, and the protruding amount of the auxiliary locking claw is locked. When the main shaft of the holding member is inserted into the support hole, it is possible to securely support the holding member in the support hole in cooperation with the locking claw of the locking member. It is possible to prevent the auxiliary locking claw from getting in the way.

  According to the fourth aspect of the present invention, since the small-diameter portion is formed on the outer periphery of the axial intermediate portion of the main shaft via the circumferential groove, the shield is deformed by impact contact with other objects during handling of the helmet. When the relative movement occurs between the anti-fogging sheets and the stress due to this is applied to the holding member, the main shaft is elastically deformed at the small diameter portion to absorb the stress and prevent the holding member from being damaged.

  According to the fifth aspect of the present invention, the head is provided with a mark indicating the eccentric position of the eccentric shaft with respect to the main shaft, while the tool engaging portion is formed at the enormous end portion. When the holding member is rotated by the engaged tool, the eccentric position of the eccentric shaft, that is, the unlocked position and the locked position with respect to the antifogging sheet can be confirmed by the mark attached to the head. Can be good.

  Further, according to the configuration of claim 6, a seal member that extends endlessly along the periphery of the outer surface of the antifogging sheet and closely contacts the inner surface of the shield is provided, and is surrounded by the seal member between the shield and the antifogging sheet. Since the sealed air gap is defined, the sealed air gap becomes a heat insulating space to reduce the temperature difference between the inner and outer surfaces of the shield and to prevent defogging, and to the opposite surface of the shield and anti-fogging sheet in rainy weather It is possible to prevent the raindrops from adhering and to prevent the deterioration of the visibility due to the raindrops as much as possible.

The perspective view of a helmet provided with the shield with an anti-fogging sheet | seat. The disassembled perspective view of a shield, an anti-fogging sheet, and a holding member. The expansion perspective view of a holding member. FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG. 1 (shown in the mounting process of the holding member). FIG. 4 is an enlarged cross-sectional view taken along line 4-4 of FIG. 1 (indicated by the unlocked position of the eccentric shaft). FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 4 is an enlarged cross-sectional view taken along line 4-4 of FIG. 1 (shown in the lock position of the eccentric shaft). FIG. 8 is a cross-sectional view taken along line 8-8 in FIG.

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

  1 and 2, a riding helmet 1 such as a motorcycle or a buggy is detachably equipped with a shield 3 that covers a front window 2 thereof. The shield 3 is formed of a translucent and hard synthetic resin (for example, polycarbonate), and an anti-fogging sheet 4 that covers the inner surface of the shield 3 over a wide range is attached. The anti-fogging sheet 4 is formed of a synthetic resin (for example, cellulose propionate) having translucency and hydrophilicity so as not to generate fog due to the breath of the user wearing the helmet 1.

  The shield 3 and the anti-fogging sheet 4 are curved so that the central portion in the left-right direction swells forward so as to follow the outer peripheral surface of the helmet 1, and the outer surface of the anti-fogging sheet 4 is endless along the periphery. The seal member 5 extending in the direction is adhered. A pair of seat portions 6 notched in a U-shape are formed on the left and right edges of the anti-fogging sheet 4, and a pair of support holes 7 (left side in FIG. 2) are formed in the shield 3 corresponding to these seat portions 6. Only the seat part 6 and the support hole 7 are shown.). The antifogging sheet 4 is attached to the shield 3 by the holding member 8 supported by the support holes 7 engaging the seat portion 6.

  As shown in FIGS. 3 to 6, each holding member 8 has a head 9 that has a head 9 a that abuts the outer surface of the shield 3 at one end and is rotatably fitted in the support hole 7 of the shield 3. An eccentric shaft 10 that is eccentrically connected to the other end of the main shaft 9 by a certain amount e with respect to the central axis Y and is opposed to the seat portion 6 of the antifogging sheet 4, and an outer end of the eccentric shaft 10 are integrally connected. It is comprised in the single component made from a synthetic resin which consists of the enormous end part 11 provided.

  The eccentric shaft 10 is formed to have a smaller diameter than the main shaft 9, and the enlarged end portion 11 is formed coaxially with the main shaft 9 and has the same diameter or slightly smaller diameter, and cooperates with the main shaft 9 to form the eccentric shaft 10. An annular groove 12 is defined around. The enormous end portion 11 and the eccentric shaft 10 can pass through the support hole 7. The eccentric shaft 10 is rotated by 180 ° between an unlocked position (see FIGS. 5 and 6) sufficiently separated from the seat 6 and a locked position (see FIGS. 7 and 8) seated on the seat 6. can do.

  An elastically deformable small-diameter portion 9c whose diameter is reduced by the circumferential groove 9b is formed in an intermediate portion of the main shaft 9 in the central axis Y direction. Further, the main shaft 9 is formed with a recess 13 having one end opened to the head 9a and the other end opened to the outer peripheral surface, and the outer periphery of the head 9a is engaged via a thinly formed hinge portion 14. The stop member 15 is integrally formed. The locking member 15 includes a disc-shaped lid portion 15a that can be fitted to the inner periphery of a circular wall portion 9d formed on the head portion 9a, a main body portion 15b provided on the inner surface of the lid portion 15a, and a main body portion. And a locking claw 15c protruding from the tip of 15b. When the locking member 15 is rotated 180 ° through the hinge portion 14, the main body portion 15 b is fitted into the recess 13 of the main shaft 9 without a gap, and the locking claw 15 c extends beyond the outer peripheral surface of the main shaft 9 in the radial direction. The lid portion 15a is fitted to the inner periphery of the wall portion 9d formed on the head portion 9a.

  On the opposite side of the position where the locking claw 15c protrudes from the outer peripheral surface of the main shaft 9, an auxiliary locking claw 9e extending in an arc shape along the outer peripheral surface of the main shaft 9 is provided. The protruding amount of the auxiliary locking claw 9e from the outer peripheral surface of the main shaft 9 is set smaller than the protruding amount of the locking claw 15c from the outer peripheral surface of the main shaft 9.

  Further, a mark projection 16 indicating the position of the eccentric shaft 10 is formed on the head portion 9 a of the main shaft 9. In the illustrated example, the mark protrusion 16 is disposed so as to protrude from the outer periphery of the head 9 a to the side opposite to the eccentric direction of the eccentric shaft 10. A hexagonal tool engaging portion 11a is formed on the outer periphery of the enlarged end portion 11 on the side opposite to the head portion 9a.

  Next, the operation of this embodiment will be described.

  In attaching the antifogging sheet 4 to the shield 3, first, the holding member 8 is inserted into the support holes 7 from the outer surface side of the shield 3 while the locking member 15 is not yet fitted in the recess 13 of the main shaft 9. Insert the huge end 11 at the head. At this time, the auxiliary locking claw 9e provided on the main shaft 9 may interfere with the support hole 7, but the outer diameter of the main shaft 9 is slightly smaller than the inner diameter of the support hole 7, and the auxiliary locking claw 9e Since the protruding amount is small and the auxiliary locking claw 9 e can be elastically deformed, the main shaft 9 of the holding member 8 can be easily inserted into the support hole 7.

  Subsequently, when the locking member 15 is rotated 180 ° around the hinge portion 14 and fitted into the recess 13 with the head portion 9a of the main shaft 9 pressed against the outer surface of the shield 3, the tip of the locking member 15 is The provided locking claw 15 c projects radially outward from the outer peripheral surface of the main shaft 9 and engages with the inner surface of the shield 3. As a result, the head 9 a comes into contact with the outer surface side of the peripheral portion of the support hole 7 of the shield 3, and the locking claw 15 c and the auxiliary locking claw 9 e come into contact with the inner surface side of the peripheral portion of the support hole 7 of the shield 3. Thus, the holding member 8 is supported by the support hole 7 so as not to drop off.

  At this time, since the locking claw 15c and the auxiliary locking claw 9e are located at both ends in the diameter direction of the main shaft 9, the holding member 8 can be reliably supported by their cooperation. In addition, after the holding member 8 is inserted into the support hole 7, the locking claw 15 c is engaged with the inner surface of the shield 3 by fitting the locking member 15 into the recess 13 of the main shaft 9. There is no risk of deformation or breakage due to interference with the support hole 7, and the durability of the holding member 8 is improved.

  Next, the left and right eccentric shafts 10 are rotated from the central axis Y of the main shaft 9 to the left and right of the shield 3 by rotating the mark protrusions 16 of the head 9 a of the main shaft 9 of the left and right holding members 8 toward the left and right central portions of the shield 3. When facing outward, the left and right eccentric shafts 10 occupy an unlocked position that maximizes the distance between the shafts. Therefore, while shifting the anti-fogging sheet 4 to the left and right, the left and right ends thereof are sequentially inserted into the annular grooves 12 of the left and right holding members 8, and the left and right seat portions 6 of the shield 3 are respectively connected to the outer circumferences of the corresponding eccentric shafts 10. It is made to oppose a surface (refer FIG. 5 and FIG. 6).

  Next, in each holding member 8, a tool 18 such as a box wrench or a spanner is engaged with the tool engaging portion 11 a of the enormous end portion 11, and the holding member 8 is rotated approximately 180 ° by the tool 18 (the rotation thereof). The angle can be confirmed from the rotational position of the mark protrusion 16.) Since the eccentric shaft 10 that rotates integrally with the mark projection 16 is pressed against the seat portion 6 at the same time, it is originally prevented from curving in a convex shape forward. The cloudy sheet 4 is further curved so that the seal member 5 is sufficiently adhered to the inner surface of the shield 3. In this state, the line of reaction force of the seat 6 against the eccentric shaft 10 passes through the central axis Y of the eccentric shaft 10 or the vicinity thereof, so that the eccentric shaft 10 is locked and the holding member 8 It is possible to prevent a spurious rotation.

  As described above, when the antifogging sheet 4 is attached to the shield 3 via the pair of holding members 8 and the endless seal member 5 is in close contact with the inner surface of the shield 3, the seal member 5 is interposed between the shield 3 and the antifogging sheet 4. Is formed as a heat insulating space to reduce the temperature difference between the inner and outer surfaces of the shield 3 and to prevent the shield 3 from being fogged. It is possible to prevent raindrops from adhering to the opposite surface of the antifogging sheet 4 and to prevent the visibility from being deteriorated by raindrops as much as possible.

  By the way, since the holding member 8 made of synthetic resin is configured as an integral single part from the head portion 9a at one end to the enormous end portion 11 at the other end as described above, the structure is simple and the attachment is easy. An anti-fogging sheet mounting structure can be provided at low cost.

  Moreover, during the handling of the helmet 1, the shield 3 is deformed due to shocking contact with another object, so that a sudden relative movement occurs between the shield 3 and the anti-fogging sheet, and the stress caused by this is applied to the holding member 8. When added, the small-diameter portion 9c of the main shaft 9 absorbs the stress by elastic deformation such as bending and elongation, and the breakage of the holding member 8 can be prevented. Therefore, the holding member 8 can reliably hold the anti-fogging sheet 4 over a long period of time due to the improvement of its durability.

  Further, in a state where the holding member 8 is supported by the support hole 7 of the shield 3, the head 9 a is in close contact with the outer surface of the shield 3, so that the holding member 8 can be prevented from falling into the support hole 7. Moreover, since the head 9a holds the shield 3 in cooperation with the locking claw 15c that is in close contact with the inner surface of the shield 3, even if stress is applied from the shield 3 to the holding member 8 when the shield 3 receives an impact. The stress is distributed to the head 9a and the locking claw 15c, thereby preventing the holding member 8 from being damaged.

  Furthermore, since the main shaft 9 and the locking member 15 are integrated via the hinge portion 14, there is no possibility that the locking member 15 is lost when the holding member 8 is assembled to the shield 3.

  When removing the anti-fogging sheet 4 from the shield 3, an operation opposite to the above attachment operation may be performed.

  The embodiments of the present invention have been described above, but various design changes can be made without departing from the scope of the present invention.

  For example, instead of the hexagonal tool engaging portion 11a, a plus or minus groove for engaging a plus or minus driver on the end face of the enormous end portion 11 can be formed.

  The mark protrusion 16 can also be formed on the head portion 9 a toward the eccentric direction of the eccentric shaft 10.

  The present invention is also applicable to attachment of an antifogging sheet to a goggle shield.

3 Shield 4 Anti-fogging sheet 5 Seal member 6 Seat portion 7 Support hole 8 Holding member 9 Main shaft 9a Head portion 9b Circumferential groove 9c Small diameter portion 9e Auxiliary locking claw 10 Eccentric shaft 11 Enormous end portion 11a Tool engagement portion 12 Annular groove 13 Concave part 14 Hinge part 15 Locking member 15c Locking claw 16 Marking protrusion (marking)
17 Sealed gap

Claims (6)

A plurality of seats (6) formed on the periphery of the antifogging sheet (4) covering the inner surface of the shield (3) and a plurality of seats (6) provided at the shield (3) at corresponding positions of the seats (6). And a plurality of holding members (8) for holding the antifogging sheet (4) by being seated on the seat (6) while being supported by the support hole (7),
The holding member (8) has a head (9a) that abuts on the outer surface of the shield (3) at one end, a main shaft (9) that is rotatably fitted in the support hole (7), and the main shaft An eccentric shaft (10) having a smaller diameter than the main shaft (9) and an outer end of the eccentric shaft (10), which is eccentrically connected to the other end of (9) and can be integrally seated and seated on the seat (6). A large end (11) that can pass through the support hole (7), and is formed in an integral manner with the main shaft (9) to define an annular groove (12) around the eccentric shaft (10). ) And a single component made of synthetic resin,
The main shaft (9) has a recess (13) having one end opened to the head (9a) and the other end opened toward the eccentric shaft (10), and one end is the head (9a). A locking claw (15c) is projected from a locking member (15) connected to the locking member (15) via a hinge portion (14), and the locking member (15) rotates around the hinge portion (14). When fitted in the recess (13), the locking claw (15c) protrudes radially outward from the outer peripheral surface of the main shaft (9) so as to be in contact with the inner surface of the shield (3). Anti-fog sheet mounting structure to the shield.   In a state where the holding member (8) is supported by the support hole (7), the head (9a) is in close contact with the outer surface of the shield (3), and the holding member (8) is attached to the support hole (7). ) And the head (9a) holds the shield (3) in cooperation with the locking claw (15c) closely contacting the inner surface of the shield (3). The antifogging sheet attachment structure to the shield according to claim 1, wherein   On the outer peripheral surface of the main shaft (9), an auxiliary locking claw (9e) protruding radially outward is provided at a position opposite to the concave portion (13), and the protruding amount of the auxiliary locking claw (9e) The anti-fogging sheet attachment structure to the shield according to claim 1 or 2, characterized in that is smaller than a protruding amount of the locking claw (15c).   The small diameter part (9c) is formed in the outer periphery of the axial direction intermediate part of the said main axis | shaft (9) via the circumferential groove | channel (9b), The any one of Claims 1-3 characterized by the above-mentioned. Anti-fog sheet mounting structure to the shield of   The head (9a) is provided with a mark (16) indicating an eccentric position of the eccentric shaft (10) with respect to the main shaft (9), while a tool engaging portion (11a) is formed at the enlarged end (11). The antifogging sheet attaching structure to the shield according to any one of claims 1 to 4, wherein the antifogging sheet is attached to the shield.   On the outer surface of the antifogging sheet (4), there is provided a seal member (5) extending endlessly along the periphery thereof and intimately contacting the inner surface of the shield (3), so that the shield (3) and the antifogging sheet are provided. The anti-fogging sheet for the shield according to any one of claims 1 to 5, wherein a sealed space (17) surrounded by the seal member (5) is defined between (4). Mounting structure.

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