JP5244925B2 - Helmet headband size adjustment device - Google Patents

Description

  The present invention relates to a headband size adjusting device in a safety helmet and a riding helmet.

  A headband disposed inside a helmet is known as a member for holding the helmet firmly on the head without rattling. The headband described in the following Patent Document 1 is arranged so as to have an annular shape so as to surround the periphery of the head, and the headband of the wearer is provided by a size adjusting device provided so as to cover both ends of the headband. The inner diameter of the annular headband can be adjusted in accordance with the circumferential length.

  The size adjusting device has an engagement protrusion projecting on one end side of the headband, and a plurality of holes on the other end side along the circumferential direction of the headband, and the engagement holes engaging with the engagement protrusions described above. The inner diameter of the headband is adjusted by engaging the engagement protrusion with the engagement hole at a position corresponding to the inner diameter of the plurality of engagement holes that matches the circumference of the wearer's head. It is designed to adjust to the circumference of the head.

JP 2000-27021 A

  According to the prior art of Patent Document 1, the helmet is held on the head by adjusting the inner diameter of the headband according to the circumference of the wearer's head with a size adjusting device and fitting the headband to the head. can do.

  However, since the size adjusting device described in Patent Document 1 adjusts the inner diameter of the headband by engaging the engaging protrusion with the engaging hole, the headband of the headband is worn while wearing a helmet. There was a problem that the inner diameter could not be adjusted. That is, with the helmet removed, adjust the headband's inner diameter to the circumference of the wearer's head visually, and then wear the helmet with the adjusted inner diameter to fit the headband. If it is tight, the helmet must be removed and adjusted again, and the headband must be adjusted until fitting and the headband fits the head, making adjustment of the inner diameter of the headband extremely cumbersome. Above, it took a considerable amount of time.

  This invention makes it an example of a subject to cope with such a problem. That is, it is an object of the present invention that the inner diameter of the headband can be adjusted while wearing the helmet, the inner diameter of the headband can be easily and quickly adjusted, the inner diameter of the headband can be adjusted accurately, and the like. .

  In order to achieve such an object, a helmet headband size adjusting device according to the present invention comprises at least the following configuration.

  In a headband size adjusting device for adjusting the inner diameter of a headband disposed in an annular shape inside a helmet, the headband is located at opposite end portions of the headband, and in the longitudinal direction on opposite surfaces of the both end portions. Between the opposite concavo-convex portions formed in parallel with each other and meshing with the concavo-convex portions, and rotatably supported and rotated, thereby rotating the both ends of the headband to each other in the circumferential direction. And a gear that adjusts the inner diameter of the headband by moving in the opposite direction, and a mechanism that is supported so as to be movable in a linear direction and that rotates the gear in conjunction with a linear motion. And a rotation restricting portion for restricting an operation direction of the operation portion to a direction in which an inner diameter of the headband is reduced and releasing the restriction. To.

  By having such characteristics, the present invention has the following effects. That is, since the inner diameter of the headband is reduced by a sliding operation of the operation unit, the inner diameter of the headband can be adjusted while wearing a helmet, and the inner diameter of the headband can be adjusted easily and quickly. Moreover, the inner diameter of the headband can be adjusted accurately.

The bottom view of the helmet which attached the size adjustment apparatus which concerns on this invention. The partially cutaway front view of the helmet which attached the size adjustment apparatus which concerns on this invention. The rear view of the helmet which attached the size adjustment apparatus which concerns on this invention. (4)-(4) sectional view taken on the line of FIG. (5)-(5) sectional view taken on the line of FIG. FIG. 6 is a sectional view taken along line (6)-(6) in FIG. 5. FIG. 6 is a sectional view taken along line (7)-(7) in FIG. 5. The operation | movement figure which shows the operation | movement of the gearwheel and headband by slide operation of the operation part which reduces the internal diameter of a headband. The operation | movement figure which shows the rotation control part by the slide operation of the operation part which reduces the internal diameter of a headband. The operation | movement figure which shows the operation | movement of the gearwheel and operation part by sliding operation of the operation part which reduces the internal diameter of a headband. The operation | movement figure which shows the operation | movement which cancelled | released control of the rotation control part.

  The helmets that are the subject of the present invention are all helmets that are fitted to the head with a headband, and do not limit the purpose of use, shape, or the like. Examples of such helmets include fire helmets and work helmets.

  It is preferable to provide an urging unit that applies an urging force against the operation in the direction of reducing the inner diameter of the headband to the aforementioned operation unit.

  The operation of the operation unit in the direction of reducing the inner diameter of the headband described above may be either a push operation or a pull operation, but is preferably a push operation. In the case of this pushing operation, the operation unit may be pushed from the outside to the inside of the helmet.

  It is good to provide the above-mentioned operation part and rotation control part on the back head side of a helmet.

  Embodiments of a helmet size adjusting apparatus according to the present invention will be described below with reference to the drawings. The helmet illustrated here is a fire fighting helmet.

  1 to 3 are configuration diagrams of a fire fighting helmet 2 to which a size adjusting device 1 is attached. The helmet 2 has a well-known structure for fire fighting, and has a polystyrene foam or an impact absorption equivalent to this foam polystyrene inside a cap body 20 molded into a predetermined shape using a fiber-reinforced synthetic resin material or a polycarbonate material. An impact absorbing liner 21 molded into a predetermined shape using a material having performance is disposed. Moreover, while being fixed to the cap body 20, it is locked by the hammock 23 and the hammock 23 which are arrange | positioned at the shape which wraps a wearer's head, and is arrange | positioned cyclically | annularly along the inner periphery of the cap body 20. A belt-like headband 22, a hammock 23 for placing the headband 22 in the cap body 20, a chin band 24 for holding the helmet 2 in a state of being covered, and a headband side of the cap body 20 can be freely inserted and removed. A provided shield 25 is provided. A roller 26 is detachably attached to the rear head side of the cap body 20.

  In the following description, the shield 25 side is the front and the roller 26 side is the rear. Moreover, the top side of the helmet 2 is set as the upper side, and the opening side of the helmet 2 is set as the lower side. Moreover, the both side parts of the helmet 2 are demonstrated as the left-right direction.

  The size adjusting device 1 is arranged on the back head side of the cap body 20 so as to be suspended from the hammock 23. The disengaging operation body 53 of the operation unit 4 and the rotation restricting unit 5 which are constituent members of the size adjusting device 1 is exposed to the outside of the casing 10, and the size adjusting operation can be performed from the outside of the roller 26. ing.

  The size adjusting device 1 is configured such that the wall 10A on the wearer side is a curved surface along the curved surface of the wearer's back head and the outer wall 10B is a curved surface along the curved surface of the inner periphery of the cap body 20. Components of the adjusting device 1 are arranged. The casing 10 is integrally provided with two suspension plates 11L and 11R for suspension on the hammock 23.

  The suspension plates 11L and 11R are provided with a plurality of screw holes 12 that are opened so as to be continuous in the vertical direction. The screws 13 are passed through the hammock 23 from the screw holes 12 to be tightened. The adjustment device 1 is suspended. Further, the vertical position of the size adjusting device 1 can be changed by changing the position of the screw hole 12 through which the screw 13 passes.

  The headband 22 constitutes an end portion side of the headband 22 and connects the end plates 22L and 22R inserted through the casing 10 so as to move in and out, and the end plates 22L and 22R. It is comprised from the strip | belt-shaped body 22A fitted to the site | part ranging from a wearer's frontal region to a temporal region, and an internal diameter is expanded / reduced by the taking-in / out operation | movement with respect to the casing 10 of end part plate 22L, 22R. .

  The band-shaped body 22A is connected to the hammock 23 and is held in place. The end plates 22L and 22R are pivotally supported with respect to the belt-like body 22A so as to be rotatable in the vertical direction. The end plates 22L and 22R rotate corresponding to the vertical position of the size adjustment device 1 so The height difference can be absorbed.

  The headband 22 includes a cushion portion 26A attached so as to be located on the wall portion 10A of the casing 10, and a cushion portion 26B attached so as to be located on the frontal side of the belt-like body 22A. .

  The cushion portion 26A is provided with end plate insertion portions 27L and 27R for inserting and supporting the end plates 22L and 22R so as to be slidable in the circumferential direction of the headband 22, and the end plates 22L and 22R with respect to the casing 10 are provided. The end plates 22L and 22R slide on the end plate insertion portions 27L and 27R during the loading and unloading operation so that the cushion portion 26A does not follow the loading and unloading operations of the end plates 22L and 22R. Deformation and displacement are prevented.

  Hereinafter, the size adjusting apparatus 1 will be described in detail with reference to FIGS. Here, only the size adjusting device 1 and the end plates 22L and 22R are illustrated and described.

  In the size adjusting device 1, insertion holes 14 </ b> L and 14 </ b> R through which the end plates 22 </ b> L and 22 </ b> R are inserted into the casing 10 are opened on both sides facing each other in the circumferential direction of the casing 10. The end plates 22L and 22R inserted through the insertion holes 14L and 14R are moved in and out along the circumferential direction from the insertion holes 14L and 14R by the size adjustment operation of the size adjusting device 1.

  In the casing 10, a gear 3 that is rotatably supported between an end plate 22 </ b> L and an end plate 22 </ b> R that face each other, and an operation unit 4 that is supported so as to be slidable in a direction in which the gear 3 is rotated. And a rotation restricting portion 5 that restricts the rotation of the gear 3 in one direction.

  On the opposing surfaces of the end plate 22L and the end plate 22R, concave and convex portions 28L and 28R that are arranged in parallel along the circumferential direction (longitudinal direction) of the end plates 22L and 22R and mesh with the gear 3 are formed. When the gear 3 rotates in a state where the gear 3 and the concave and convex portions 28L and 28R are engaged with each other, the end plates 22L and 22R are moved in and out of the casing 10 (FIGS. 4 and 8). reference).

  The operation portion 4 is formed with an uneven portion 40 that is juxtaposed along the sliding direction of the operation portion 4 and meshes with the gear 3. The operation portion 4 slides in a state where the gear 3 and the uneven portion 40 are engaged. As a result, the gear 3 is rotated (see FIGS. 7 and 10).

  The gear 3 is arranged with the axis line in the vertical direction, and includes a first gear 3A that meshes with the concavo-convex portion 40 below, and a second gear 3B that meshes with the concavo-convex portions 28L and 28R above, The second gear 3B is integrally formed so as to be coaxial (see FIG. 5).

  The first gear 3A has a smaller diameter and a smaller number of teeth than the second gear 3B, and has a gear with which the operation distance of the end plates 22L and 22R with respect to the casing 10 is longer than the sliding distance of the operation unit 4. It is a ratio.

  That is, by setting the first gear 3A and the second gear 3B to the gear ratio as described above, the operation distance of the end plates 22L and 22R with respect to the casing 10 can be increased with a short sliding distance of the operation unit 4. Therefore, the operation of the operation unit 4 can be made compact, and the end plate 22L, 22R can be quickly put in and out of the casing 10.

  The gear 3 is not limited to the form in which the first gear 3A and the second gear 3B are coaxial as illustrated, but the second gear 3B rotates in conjunction with the rotation of the first gear 3A. I just need it.

  The operation unit 4 is supported so as to be linearly reciprocable along the front-rear direction. The rear end portion of the operation portion 4 is always exposed from the casing 10, and the gear 3 is rotated by manually pushing the rear end portion forward. The rotation direction of the gear 3 at this time is a direction in which the end plates 22L and 22R are put into the casing 10, and a direction in which the inner diameter of the headband 22 is reduced (see FIGS. 7 and 10).

  The operation portion 4 is formed with a space portion 4A having an opening on the casing 10 side. By the convex-concave engagement between the convex portion 41 formed inside the space portion 4A and the concave portion 42 formed in the casing 10. The slide guide 4B linearly slides back and forth along the front-rear direction.

  A compression spring 6 that is an urging means is disposed so as to surround the slide guide portion 4B over the space portion 4A and the inner surface of the casing 10, and the urging force of the compression spring 6 resists the forward sliding operation. Acts on the operation unit 4. The gear 3 is rotated by the operation unit 4 sliding backward by the urging force of the compression spring 6. The rotation direction of the gear 3 at this time is a direction in which the end plates 22L and 22R are taken out from the casing 10, and is a direction in which the inner diameter of the headband 22 is enlarged.

  The backward sliding of the operation unit 4 is regulated by the rotation regulating unit 5. By releasing the regulation of the rotation regulating unit 5, the operation unit 4 is slid backward by the urging force of the compression spring 6, The headband 22 is enlarged (see FIGS. 6, 9, and 11).

  Here, the operation of the operation unit 4 for reducing the inner diameter of the headband 22 is an operation for fitting the helmet 2, and the operation unit 4 is fitted until the headband 22 is fitted to the head while wearing the helmet 2. Fitting can be performed by pushing the button. Further, when the helmet 2 is removed, it may be removed with the headband 22 fitted, or the restriction of the rotation restricting portion 5 is released, and the operating portion 4 is slid rearward by the urging force of the compression spring 6 to thereby remove the headband. 22 may be enlarged and taken off.

  The rotation restricting portion 5 has a ratchet structure, and is a ratchet gear provided between the first gear 3A and the second gear 3B so as to rotate integrally with the first gear 3A and the second gear 3B. 50, an engaging claw 51 that removably engages with the ratchet gear 50, a compression spring 52 that urges the engaging claw 51 in a direction to engage the ratchet gear 50, It is comprised from the engagement release operation body 53 which forcibly releases engagement with the ratchet gear 50 by manual operation (refer FIG.5, FIG.6, FIG.9, FIG. 11).

  The ratchet gear 50 is set so that the engaging claw 51 is engaged with and disengaged from the ratchet gear 50 when the gear 3 is rotated by the forward sliding operation of the operation unit 4. 6 is set to a direction in which the engaging claw 51 maintains the engagement with the ratchet gear 50 when the gear 3 is to be rotated by sliding the operation unit 4 backward by 6.

  Such a ratchet gear 50 is rotated without obstructing the rotation of the gear 3 during the forward sliding operation of the operation unit 4 so that the inner diameter of the headband 22 can be reduced, and the operation unit 4 of the compression spring 6 is moved backward. For the force to be slid, the rotation of the gear 3 can be prevented, and the fit state of the headband 22 with respect to the head can be maintained.

  The engagement release operation body 53 is formed integrally with the engagement claw 51 and protrudes from the casing 10 so that the rear side is adjacent to the operation unit 4. The disengaging operation body 53 is pivotally supported in the casing 10 so as to rotate about an axis parallel to the axis of the gear 3, and a portion protruding from the casing 10 is close to the operation unit 4. -Tilt in the left-right direction so as to be separated.

  The disengaging operation body 53 has an engaging claw 51 positioned at an end in the casing 10, and the urging force of the compression spring 52 that urges the engaging claw 51 in a direction to engage with the ratchet gear 50. The disengagement operation body 53 is tilted in the direction away from the operation unit 4 and the disengagement operation body 53 is kept away from the operation unit 4.

  Further, the engagement claw 51 is disengaged from the ratchet gear 50 by tilting the disengagement operation body 53 against the urging force of the compression spring 52 in the direction close to the operation unit 4 (left direction). Be able to.

  That is, when the engagement claw 51 is disengaged from the ratchet gear 50 by the tilting operation of the disengagement operation body 53, the gear 3 is in a rotatable state, so that the operation body 4 is moved backward by the biasing force of the compression spring 6. The inner diameter of the headband 22 is expanded by rotating the gear 3 as the operating body 4 slides.

  According to the size adjusting apparatus 1 having such a configuration, the operation unit 4 can be pushed while wearing the helmet 2 and the helmet 2 is fitted by reducing the inner diameter of the headband 22 by the pushing operation. be able to. In addition, the engagement release operation body 53 can be tilted while wearing the helmet 2, and the fit of the helmet 2 can be released by enlarging the inner diameter of the headband 22 by this tilting operation. That is, it is possible to perform a reduction operation and an enlargement operation of the inner diameter of the headband 22 with one touch.

  Further, the fitting of the helmet 2 is performed by pushing the operation unit 4 forward, and the fitting release of the helmet 2 is performed by tilting the disengaging operation body 53, so that these operations are performed. This can be done from the outside of the roller 26. That is, the fitting operation and the fitting releasing operation of the helmet can be performed without turning up the rollers 26.

  Therefore, since the size adjusting device 1 of the present embodiment reduces the inner diameter of the headband, the fitting can be performed while wearing a helmet, and the fitting can be performed easily, quickly and accurately. it can. Moreover, the fitting can be released easily and quickly while wearing the helmet.

  It should be noted that the present invention is not limited to the illustrated embodiments, and can be implemented with configurations within a range that does not deviate from the contents described in the respective claims.

  For example, in the above-described embodiment, the configuration in which the size adjusting device 1 is arranged on the back head side of the helmet 2 is illustrated, but the position of the size adjusting device 1 is not limited to the back head side of the helmet 2, Any position that does not interfere with the wearer and can be operated to fit the helmet 2 may be used (not shown).

  In the above-described embodiment, the operation of the operation unit 4 for fitting the helmet 2 is exemplified as an operation of pushing forward. However, the present invention is not limited to the push operation, and the operation unit 4 is moved backward. It is good also as a structure which can fit the helmet 2 by operation to move or to move to the left-right direction (not shown).

  In the above-described embodiment, the operation of the disengagement operation body 53 for releasing the fitting of the helmet 2 is exemplified as a tilt. However, the present invention is not limited to the tilt operation, and the disengagement operation body is not limited to the tilt operation. It is good also as a structure which can cancel | release fitting of the helmet 2 by operation which pushes 53 forward, or operation which pulls back (not shown).

  In the above-described embodiment, the headband 22 is exemplified by the configuration including the three members of the end plates 22L and 22R and the belt-like body 22A. However, the present invention is not limited to the configuration of the three members, It may be a headband.

1: Size adjusting device 2: Helmet 22: Headband 22L: End plate 22R: End plate 28L: Uneven portion 28R: Uneven portion 3: Gear 4: Operation portion 40: Uneven portion 5: Rotation restricting portion 6: Compression spring (Energizing Department)

Claims (4)

In the headband size adjusting device that adjusts the inner diameter of the headband arranged in an annular shape inside the helmet,
In the opposite end portions of the headband that overlap each other, the concave and convex portions formed in parallel along the longitudinal direction on the opposing surfaces of the both end portions;
The headband is located between the opposing concavo-convex portions, meshes with the concavo-convex portions, is rotatably supported by the shaft, and rotates to move both end portions of the headband in opposite directions along the circumferential direction. A gear for adjusting the inner diameter of the band;
An operation unit that is supported so as to be movable in a linear direction and includes a mechanism that rotates the gear in conjunction with an operation in the linear direction;
While restricting the operation direction of the operation unit in a direction to reduce the inner diameter of the headband, a rotation restricting unit for releasing the restriction,
An apparatus for adjusting the size of a headband of a helmet, comprising:   2. The headband size adjusting device for a helmet according to claim 1, further comprising an urging portion that applies an urging force against the operation in a direction in which the inner diameter of the headband is reduced. .   The size of the headband of the helmet according to claim 1 or 2, wherein the operation of the operation unit in the direction of reducing the inner diameter of the headband is a pushing operation of pushing from the outside to the inside of the helmet. Adjustment device.   The headband size adjusting device according to any one of claims 1 to 3, wherein the operation portion and the rotation restricting portion are provided on a rear head side of the helmet.

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