JP2006204691A - Buckle structure of helmet head band - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a buckle of a helmet head band improving the durability against the repetition of the operation of pushing a button. <P>SOLUTION: This buckle structure of the helmet head band is provided with a buckle body 10 fixed to the inside of a cover 9 inserted with a belt 4, a stopper 11 fixed to the body 10 and constituting an insertion space for a belt 9 between itself and the body 10, and a curved leaf allowing the projection of a button 8 projecting at the center of its surface from the surface of the cover 9, and one end of the leaf 12 has a projecting locking pawl 12a engaged with a plurality of pawl parts 7 engraved in the belt 4 in a curved state at one end of the leaf 12 and separated from the pawl parts 7 by the operation of button for elastically deforming the leaf 12 into a flat state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a buckle structure of a headband for a helmet that is effective for use in tightening adjustment of a headband in a helmet for construction or motorcycle.

  As a buckle for adjusting the tightening of the headband in this type of helmet, there is a synthetic resin buckle shown in Patent Document 1 below. This includes a buckle body having a belt insertion space, and an operation plate that is swingably integrated via pin-shaped resin hinges integrally formed on both sides of the upper surface of the buckle body. One end of the plate is provided with a ratchet pawl that is urged to the side that is always meshed with the ratchet teeth engraved on the belt, and a push button is integrally projected on the upper surface of the other end.

In this structure, the ratchet pawl engages with the ratchet teeth so that the belt can be moved to the tightening side, but is prevented from coming off in the reverse direction. By pressing the push button from this state, the operation plate is elastically deformed to the opposite side with the resin hinge as a fulcrum, so that the ratchet pawl is detached from the ratchet teeth and the reverse movement is enabled. .
Japanese Patent Publication No. 200-135103

However, in this structure, when the push button operation is repeatedly performed, bending stress is concentrated at one point of the resin hinge portion, and fatigue is generated, and brittle fracture is likely to occur at this portion.
In addition, the headband adopting the seed mechanism must be securely fitted to the wearer's head, and in the unlikely event that such brittle fracture occurs, the helmet and the headband from the user's head. Falls off and is extremely dangerous.
For this reason, when the rigidity of the resin hinge is set high, the elastic resistance at the time of button operation is too large, and there is a drawback that it is difficult to obtain deformation in the direction of detachment of the operation plate.

  The present invention solves the above-described problems and provides a helmet headband buckle structure capable of improving durability by repeated push button operations.

In order to achieve the above object, as shown in the embodiment of the present invention, the present invention provides a belt on one of the headbands arranged inside the helmet and a belt insertion buckle facing the other, A plurality of claw portions for retaining are provided on the surface of the belt, and a plurality of claw portions are provided inside the buckle by a locking claw that selectively engages with the plurality of claw portions and a push operation. In the buckle structure of the helmet headband with a mechanism for releasing the engagement between the portion and the locking claw,
The buckle (buckle portion 6, 20) is a stopper that is fixed to the buckle body 10 (21) and the buckle body 10 (21) to form an insertion space for the belt 4 between the buckle body 10 (21). A plate 11 (22) and a spring plate 12 (23) disposed on the upper surface of the stopper plate 11 (22), and the spring plate 12 (23) is provided on the belt in a natural state at one end thereof. A locking claw 12a (23a) that is separated from the plurality of claw portions 7 is formed by selectively engaging the plurality of claw portions 7 and elastically deforming the spring plate 12 (23) by a pushing operation. It is characterized by that.

  In the present invention, the buckle (buckle portions 6 and 20) includes a housing-type cover 9 that is open at the front and rear so that the belt 4 is inserted, and a buckle body 10 ( 21) and a stopper plate 11 (22) which is fixed to the buckle body 10 (21) and forms a space for inserting the belt 4 between the buckle body 10 (21) and the stopper plate 11 (22) A push button 8 (24) which is disposed on the upper surface and is held in a sandwiched state with the cover 9 and which projects from the center of the spring plate 12 (23) is provided on the cover 9. A spring plate 12 (23) curved downward in the front-rear direction that protrudes from the surface, and is selectively attached to one end of the spring plate 12 (23) by the plurality of claw portions 7 provided on the belt in a curved state. Engage and push button 8 (2 ) The spring plate 12 by the pressing operation (23) that is elastically deformed in a flat shape, characterized in that the formation of the locking claw 12a (23a) away from said plurality of claw portions 7.

  Further, the plurality of claw portions 7 of the belt are ratchet teeth, and the locking claws 12a (23a) of the spring plate 12 (23) are ratchet claws. It is characterized in that the engagement is restricted and the insertion of the belt is allowed in the insertion direction, and the restriction in the belt withdrawal direction is released in the separated state.

  Furthermore, the buckle body 10 (21) has a bottom surface portion 10a (21a) provided in the front-rear direction of the other end of the band and side wall portions 10b (21b) formed on both sides thereof. A stopper plate 11 (22) is installed between the portions 10b (21b) so as to form a belt insertion space with the bottom surface portion 10a (21a). The downwardly curved spring plate 12 (23) is installed, and the locking claw 12a (23a) at the tip of the spring plate 12 (23) protrudes into the belt insertion space and selectively engages with the plurality of claw portions 7. It is characterized by being adapted.

  Furthermore, as shown in the second embodiment of FIGS. 4 and 5, the spring plate positioning pin-like protrusions 22 b are provided on the front and back of the stopper plate 22, and the spring plate 23. Positioning holes 23c that are inserted through the protrusions 22b are opened before and after. The protrusion 22b and the positioning hole 23c are formed at the front and rear. The positions of the protrusion 22b and the positioning hole 23c may be such that the protrusion is formed on the spring plate and the positioning hole is formed on the stopper plate.

In the above configuration, in the free state of FIG. 3A, when the belt 4 continuously formed on one side of the headband 1 is inserted into the buckle portion 6 fixed to the other side, the spring plate 12 is engaged. The pawl 12 a engages with the plural pawl portions 7 made of ratchet teeth on the upper surface of the belt 4. Thereby, even if the headband 1 can be tightened by pulling the belt 4 in the distal direction, it cannot be pulled backward and the headband 1 cannot be loosened.
From this free state, as shown in FIG. 3 (b), the spring plate 12 is placed on the flat upper surface of the stopper plate 11 by depressing the push button 8 (pressing outward from the inner side of the helmet when the helmet is worn). Accordingly, the locking claw 12a is lifted from the plurality of claw portions 7 and the engaged state is released, and the headband 1 can be loosened by freely moving the belt 4 rearward.

  According to the present invention, since the latching claw is separated from the claw portion by elastically deforming the entire spring plate in a flat shape, there is no occurrence of local strain or breakage associated with this even if the push button operation is repeated, Rich in durability.

  In addition, the tightening direction of the belt is not restricted, and only the loosening direction is restricted. Therefore, especially when adjusting the tightening, the push button operation is not performed every time, and the adjustment becomes easy.

  According to the invention of claim 5, when the spring plate is assembled to the main body, the position of the claw is not erroneously attached, and the assemblability is excellent.

(First embodiment)
The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
1 to 3 show a first embodiment. FIG. 1 shows a headband for a helmet to which the present invention is applied.

  The headband 1 in the figure is made of a flexible synthetic resin injection molded body, and is formed with locking pieces 3 connected to a lining of a helmet (not shown) at a plurality of locations on the outer periphery of a band body 2 formed in a loop shape. At the same time, the fastening belt 4 is integrally formed at one end of the loop of the band body 2 and the belt guide strip 5 is integrally formed at the other end. A buckle portion 6 for inserting the belt 4 is integrally projected on the surface of the strip 5. The buckle portion 6 has a housing shape that opens in the front-rear direction, and is formed on the surface of the strip 5. The head 4 of the wearer is fastened and fixed by inserting the belt 4 through the buckle portion 6 and fixing it at an appropriate position.

  The belt 4 has a plurality of claw portions 7 made of a plurality of ratchet teeth that can move only in the tightening direction by engaging with a locking claw 12a made of a ratchet claw, which will be described later. From the hole 9b on the surface of the part 6, a push button 8 for releasing the engagement of a locking claw 12a made of a ratchet claw, which will be described later, protrudes.

  FIG. 2 shows the detailed structure of the buckle portion 6, which protrudes from the surface of the strip 5, and has a cover 9 that opens at the front and rear and at the back, and the inside of the cover 9 from the back opening of the cover 9. A buckle body 10 to be inserted, a flexure stopper plate 11 fixed to the buckle body 10, and an upper surface of the stopper plate 11 which is fixed in a sandwiched state between the cover 9 and the center of the surface. A spring plate 12 provided with a push button 8 is provided.

  The cover 9 is formed by integral molding on the upper surface of the strip 5 constituting the other end of the band main body 2 and has a housing shape in which the front and rear and the back are opened. The front / rear opening 9a of the cover 9 is an opening for the insertion of the belt 4, and a hole 9b and a notch 9c for insertion of the push button 8 are formed on the upper surface thereof, and further, the front and rear openings 9b A pair of locking holes 9d are opened.

  The buckle body 10 is inserted into the cover 9 and has a bottom surface portion 10a that is flush with the strip 5 and both side walls that rise on both sides and adhere to the inside of both side walls of the cover 9. It includes a portion 10b and a pair of front and rear locking claws 10c that project from the lower portions of both side wall portions 10b and are fitted into the locking holes 9 to be prevented from being removed.

  The stopper plate 11 constitutes a space through which the belt 9 is inserted between the stopper plate 11 and the bottom surface portion 10a of the buckle body 10, and the both ends of the stopper plate 11 are installed at the front end step portion of the buckle body 10 and on both sides of the rear portion. A protruding piece 11a that is fitted and fixed in a locking elongated hole that is opened on both side walls of the buckle body 9 is projected, and the spring plate 12 is placed at the front and rear ends of the central plate-like portion 11b. Support in a curved shape. In addition, a guide pin 11c that fits into a hole formed on the back surface side of the push button 8 protrudes from the center of the plate-like portion 11b.

  The spring plate 12 is a downwardly curved plate spring, and is made of an elastic resin having the push button 8 integrally projecting on the center upper surface thereof. The pawl 12a protrudes integrally.

  In the assembled state in the above configuration, as shown in FIG. 3A, the spring plate 12 projects the push button 8 through the hole 9b opened in the upper surface of the cover 9, and the front and rear surfaces of the spring plate 12 are stopper plates. The guide pin 11c is fitted in a hole 8a formed between the upper surface of the cover 9 and in contact with the front and rear edge portions of the plate-like portion 11b of the eleventh plate. By combining them, only lifting and lowering operations are possible.

  In this state, the engagement claw 12a made of a ratchet claw at the tip of the spring plate 12 is engaged with the plurality of claw portions 7 made of ratchet teeth, so that it can move only in the tightening direction of the band 2, and vice versa. Restriction is made on the direction of the pulling out.

  From this state, as shown in FIG. 3B, by pressing the push button 8 with a finger, the spring plate 12 is elastically deformed in a flat shape in the pressing direction, and the front and rear edges of the plate-like portion 11b are held at the fulcrum. When the locking claw 12a is lifted and disengaged from the claw portion 7, the restriction of the band 2 in the removal direction is released.

  By repeating the above button operation, the spring plate 12 is repeatedly subjected to bending stress, but since the whole is bent while shifting the front and rear edges of the plate-like portion 11b, the stress is not concentrated locally, Durability can be obtained sufficiently.

  In the embodiment, the guide pin 11c is fitted into the hole 8a formed on the inner side of the push button 8 so that the positioning between the two is performed. However, the guide pin (or the boss hole is provided on the back side of the spring plate 12). ), And a boss hole (guide pin) may be formed in the plate-like portion 11b to perform positioning between the two. In this way, the spring plate 12 is detachably positioned and fixed at a predetermined position on the upper surface of the stopper plate 11 by means of uneven engagement or the like.

  Furthermore, in the embodiment, the engagement of the ratchet teeth and the ratchet claw makes it possible to move the belt only by one operation, regardless of the push button operation. It goes without saying that movement to both sides can be made possible by operation.

(Second Embodiment)
Next, FIG. FIG. 5 shows a buckle according to a second embodiment of the present invention, FIG. 4 is an exploded perspective view of the buckle, and FIGS. 5A and 5B are cross-sectional views showing a push button operation state in the buckle.
In addition, in this embodiment, the same code | symbol is used for the same location as the said embodiment, and it demonstrates using a different code | symbol only to a different location. A buckle portion 20 in the figure is disposed on a buckle body 21 covered with a cover (not shown), a bending stopper plate 22 provided inside the buckle body 21, and the stopper plate 22, and is sandwiched between the covers. And a push button 24 protruding from the top of the spring plate 23.

  The buckle body 21 is flush with the strip 5 and includes a bottom surface portion 21a that closes the bottom opening of the cover, and both side wall portions 21b that rise on both sides, and the both side portions of the stopper plate 22 are formed on both side walls. The belt 21 is integrally provided inside the portion 21b, and a gap for inserting the belt is formed in the front-rear direction between the bottom portion 21a and the bottom portion 21a.

  A plurality of ribs 22a for positioning the spring plate 23 project inwardly between the stopper plate 22 and the side wall portions 21b, and a pair of positioning pins in the front and rear of the center portion. The protrusion 22b is erected.

  The spring plate 23 is made of a downwardly curved elastic resin, and a locking claw 23a that meshes with the claw portion 7 on the belt side is integrally projected at the lower end of the spring plate. The width of the spring plate 23 corresponds to the width between the ribs 22a facing each other in the width direction, and is unevenly formed in the gap between the front and rear ribs 22a formed in the middle of the both side walls 21b of the buckle body 21. A pair of engaging projections 23 b are integrally extended in the middle of both sides of the spring plate 23. Further, a positioning hole 23c that is inserted through the pin-shaped protrusion 22b is opened before and after the central portion of the spring plate 23.

  When the spring plate 23 is accurately positioned and placed on the stopper plate 22, the gap between the convex portion 23b and the front and rear ribs 22a is engaged, and at the same time, the front and rear pin-shaped protrusions 22b and the positioning holes 23c are engaged. Match. Further, when the positioning placement of the spring plate 23 is reversed, the engagement between the convex portion 23b and the front and rear ribs 22a or the engagement between the front and rear pin-shaped protrusions 22b and the positioning hole 23c becomes impossible. It is formed as follows. Thereby, the positioning at the time of mounting | wearing with respect to the buckle main body 21 of the spring board 23 is performed.

  The above configuration is often caused when the spring plate 23 is assembled to the main body 21 with the wrong front and back, and the direction of the locking claw 23a is reversed, and the engagement state with the claw portion 7 cannot be obtained. Because there is. For this reason, the combination of the projection 23b and the front and rear ribs 22a and the front and rear pin-shaped protrusions 22b and the positioning holes 23c make it impossible to assemble the wrong front and back. This is because it is possible to assemble only to.

  In the above, in the normal state, as shown in FIG. 5A, the spring plate 23 maintains a curved shape, the locking claw 23 at the tip thereof meshes with the claw portion 7, and the belt 4 is fixed at the adjustment position. As shown in FIG. 5B, when the push button 24 is pressed, the spring plate 23 is elastically deformed into a flat shape, the locking claw 23 is separated from the claw portion, and the length can be adjusted as described above. There is no change in form. However, in this embodiment, there is no incorrect assembly before and after the spring plate 23 is assembled, and the assemblability is improved.

It is a perspective view of the headband for helmets concerning the present invention. 1 is an exploded perspective view of a buckle according to a first embodiment of the present invention. (A), (b) is sectional drawing which shows the pushbutton operating state in the assembly state of the buckle. It is a disassembled perspective view of the buckle by 2nd Embodiment of this invention. (A), (b) is sectional drawing which shows the pushbutton operating state in the assembly state of the buckle.

Explanation of symbols

1 Headband 4 Belt 6,20 Buckle 7 Multiple claw parts (ratchet teeth)
8, 24 Push button 9 Cover 10, 21 Buckle body 11, 22 Stopper plate 22a Rib 22b Positioning projection 12, 23 Spring plate 23b Protruding portion 23c Positioning hole 12a, 23a Locking claw (ratchet claw)

Claims (5)

A belt is provided on one side of the headband disposed inside the helmet, and a belt insertion buckle is provided on the other side, and a plurality of retaining claws are provided on the surface of the belt. Is a helmet headband having a locking claw that selectively engages with the plurality of claw portions, and a mechanism for releasing the engagement between the plurality of claw portions and the locking claw by a pushing operation. In buckle structure,
The buckle includes a buckle body, a stopper plate that is fixed to the buckle body and forms an insertion space for the belt between the buckle body, and a spring plate disposed on the upper surface side of the stopper plate,
One end of the spring plate is selectively engaged with the plurality of claw portions provided on the belt in a natural state, and the spring plate is elastically deformed by a pushing operation so as to be separated from the plurality of claw portions. A buckle structure for a helmet headband, characterized in that a locking claw is formed. A belt is provided on one side of the headband disposed inside the helmet, and a belt insertion buckle is provided on the other side, and a plurality of retaining claws are provided on the surface of the belt. Is a helmet headband having a locking claw that selectively engages with the plurality of claw portions, and a mechanism for releasing the engagement between the plurality of claw portions and the locking claw by a push button operation. In buckle structure,
The buckle is fixedly provided on the other of the headbands, a cover through which a belt is inserted, a buckle body fixed in the cover, and the belt between the buckle body and the buckle body. A push button disposed on the upper surface of the stopper plate and held in a sandwiched state between the stopper plate and the cover, and projecting from the surface center of the push button. A spring plate having a curved shape curved downward in the front-rear direction,
One end of the spring plate is selectively engaged with the plurality of claw portions provided on the belt in a curved state, and the spring plate is elastically deformed into a flat shape by operating a push button, thereby the plurality of claw portions. A buckle structure for a helmet headband, characterized in that a locking claw that is further separated is formed.   The plurality of claw portions of the belt are ratchet teeth, and the latching claw of the spring plate is a ratchet claw. 3. The helmet headband buckle structure according to claim 1, wherein the restriction of the belt withdrawal direction is released in a separated state.   The buckle body has a bottom surface portion provided in the front-rear direction of the other end of the band and side wall portions formed on both sides thereof, and a belt insertion space is provided between the both side wall portions between the bottom surface portion. The stopper plate is constructed so as to form, and the spring plate having a downwardly curved shape in the front-rear direction is installed on the upper surface of the stopper plate, and the locking claw at the tip of the spring plate protrudes into the belt insertion space to 4. The helmet headband buckle structure according to claim 1, wherein the buckle structure is selectively engaged with the claw portion. The stopper plate is formed with a positioning projection (or positioning hole) for the spring plate, and the spring plate is positioned with a positioning hole (or a positioning projection inserted into the positioning hole). The helmet band buckle structure according to any one of claims 1 to 4, wherein a part) is formed.

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