• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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  • 优先权
    • 专利摘要:
    device for fixing and adjusting a safety helmet and safety helmet strap. a device for fixing and adjusting a belt is described, comprising a basic body constructed to allow the insertion of at least part of the belt in it, and at least one ratchet rotatably attached to the basic body and provided with a portion of coupling adapted to engage at least a corresponding portion of the belt. the device also comprises first elastic means, interposed between the ratchet and the basic body to, reversibly, hold the ratchet in at least one position of engagement with the belt, and at least one operating lever to rotate the ratchet from at least one engaged with the belt for at least one disengaged position, reversibly exceeding the resistance of the first elastic medium. the device is characterized by the fact that the operating lever is fixed on the ratchet in a rotating manner by at least a certain angular interval. the device is also provided with a second elastic means for regulating the rotation of the operating lever in relation to the ratchet in said angular rotation range.
    公开号:BR102012001013B1
    申请号:R102012001013-5
    申请日:2012-01-16
    公开日:2020-09-01
    发明作者:Luca Gafforio；Alberto Salvetti
    申请人:Opticos S.R.L；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a device for adjusting and fixing a strap and, particularly, for fixing and adjusting the chin strap ("chin strap"), which allows the helmet to be attached to the user, preventing its removal.
    [0002] The safety helmets currently used in the field of motorcycling, and the like, are provided with a chin strap, which is attached and adjusted in length in such a way as to adhere to the wearer's throat and thus prevent accidental removal of the user's head helmet, especially in the event of a fall.
    [0003] In particular, the chin strap is generally attached to one lower end of the helmet and permanently attached to the other lower end of the helmet by means of a fixing device.
    [0004] As a rule, the chin strap is formed of two or more parts, which can be mutually fixed and adjusted by means of the fixing device, which is integral with one end of these parts.
    [0005] Although specific references have been made to safety helmets used in the field of motorcycling, as will be seen, the device according to the present invention can generally be used in all safety helmets used to protect a user's head , for example, two-wheel vehicles and the like, snowmobiles (snowmobiles), and also, generally, to fasten and adjust any belt used to mutually fasten two flaps of a personal clothing or accessory.
    [0006] Over the years, several systems have been developed to secure and adjust the length of the chin strap of helmets, such as those provided for inserting at least a portion of the belt, usually ribbon-like, into two rings .
    [0007] Although the production is very simple, this system is not very intuitive and is complicated to use, due to the need to pass the belt through the two rings according to a pre-established order, when you want to fix the belt of the chin.
    [0008] Furthermore, once the ribbon-like strap has been inserted through the two rings, its free end must be properly protected, for example, by means of Velcro portions, or similar means, to avoid an irritating effect of beat.
    [0009] Chin strap systems are also known, comprising a buckle, inserted in the interior in a complementary portion, constructed in such a way as to achieve a position of coupling with it. The detachment of the device is achieved through the operation of a button, which causes the complementary portion of the buckle to be released. This type of device, which substantially comprises a male portion and a corresponding movable female portion between two positions, a coupling position and a chin strap release position, does not allow fine adjustment of the strip length to be performed in one simply and quickly.
    [0010] In this regard, devices were developed for the adjustment and fixation of the chin strap, provided with a pivoted ratchet inside a corresponding housing and having one or more teeth adapted to engage a corresponding toothed portion, which is provided on the belt the chin.
    [0011] The engagement of the toothed portion of the ratchet with that of the belt, allows the latter to be secured inside the device in such a way as to prevent the extraction of the belt from the device without first operating the ratchet.
    [0012] At the same time, these devices allow the chin strap length to be adjusted by sliding the belt teeth inside the device housing in different positions of engagement with the ratchet, until reaching the desired position. This type of adjustment is known in the art as "micrometric" coupling, as it allows fine adjustment of the chin strap length, which offers a high level of adaptability to the various users of these belts.
    [0013] In this type of device, the ratchet is normally held in a position of engagement with the belt by means of a spring and, when it is desired to extract the belt from the fixing device to allow the user to remove the helmet from his head, he or it manually acts on the ratchet causing its movement away from the engagement position with the toothed portion of the belt and, therefore, allowing it to be loosened and to slide freely.
    [0014] These devices suffer from some problems related to the fact that, in order to be operated manually, the ratchet must project from the body, or housing, of the device, and this can lead to accidental and undesirable alteration of the ratchet position where the chin strap is attached.
    [0015] Particularly, it is possible that the projecting part of the ratchet is raised through accidental contact with external objects, such as the possibility of contact with parts of the rider's jacket, or movements of the user, which may inadvertently cause the detachment of the belt.
    [0016] To overcome these inconveniences, in some cases, the size of the ratchet is reduced in such a way that it does not protrude, and a tape is attached to it to facilitate the operation of the ratchet by the user when he or she wishes to loosen the belt from the chin.
    [0017] In other devices, the ratchet release from the chin strap's fixed position, is performed through the operation of an additional lever articulated to the device's housing and, cinematically, coupled to the ratchet. In these devices, the ratchet is moved from the position of engagement with the belt, through the action on a lever, which is constructed and placed in a position of contact with the ratchet, in such a way, to be able to cause the detachment of the same as the belt.
    [0018] A device of this type is described in document EP-A-0772983 by applicant EDC, in which the ratchet is operated in rotation to disengage the chin strap by means of a lever, rotatably fixed on the device housing. It should be noted that, although being provided with a lever that prevents direct operation of the ratchet, in the device described in EP-A-0772983, the operating lever and the ratchet are always in contact, and this means that, to avoid accidental operation of the lever to cause the belt to detach, the lever must be formed in such a way as to have an engaging surface with the ratchet with an initial rotation, even for a short angular interval, which has no effect on the ratchet.
    [0019] In addition, the coupling between the ratchet and the lever, both pivoted to the device housing, must have a certain degree of precision, which requires compliance with somewhat limited tolerances.
    [0020] This means that, both due to the particular shape of the lever, and due to the considerably limited necessary tolerances, the device described in EP-A-0772983 is complicated to produce and, therefore, expensive. In addition, this chin strap fastening device is of significant dimensions, due to the need to produce a device body with dimensions such that they are capable of fastening both the ratchet and the operating lever.
    [0021] The purpose of the present invention is to provide a device for fixing and adjusting a belt, particularly the chin strap of safety helmets, which solves the problems of the prior art briefly described above.
    [0022] Particularly, an objective of the present invention is to provide a device for fixing and adjusting a belt that has compact dimensions and, therefore, reduced weight, while allowing the effective fixation and adjustment of the belt to be achieved, reducing the possibility of accidental detachment and release of the belt.
    [0023] Furthermore, an objective of the present invention is to provide a device for fixing and adjusting the belt that is simple to produce and use, without decreasing the effectiveness of the fixation and the possibility of adjusting the length of the belt.
    [0024] These and other objectives are achieved by the device for fixing and adjusting a belt according to the present invention, comprising a basic body, or carcass, constructed in order to allow the insertion of at least part of the belt, and at least a ratchet fixed, in a rotating manner, to the basic body and provided with a coupling portion adapted to engage at least a corresponding portion of the belt. The device also comprises a first elastic means interposed between the ratchet and the basic body to, reversibly, hold the ratchet in at least one position of engagement with the belt, and at least one operating lever to rotate the ratchet from at least one engaged position with the belt, for at least one disengaged position, reversibly exceeding the resistance of the first elastic medium.
    [0025] The device is characterized by the fact that the operating lever is fixed to the ratchet in a rotating manner, by at least a certain angular interval.
    [0026] The present device also comprises a second elastic means for regulating the rotation of the operating lever in relation to the ratchet in said angular rotation range. The aforementioned second elastic means for regulating the rotation of the operating lever in relation to the ratchet, in the undeformed, or initial, condition of the same, is just as for maintaining the operating lever in at least one resting position, not coinciding with the position of contact with the ratchet.
    [0027] Advantageously, by fixing the operating lever directly to the ratchet, the total dimensions of the device can be reduced.
    [0028] In addition, this structure makes it no longer necessary to mold the lever engaging surface with the ratchet in a particular shape, and does not require extremely limited tolerances for mounting the lever on the ratchet.
    [0029] According to an aspect of the present device, the angular interval of rotation of the operating lever in relation to the ratchet, comprises at least one position of contact of the operating lever with the ratchet, where the rotation of the operational lever in relation to the ratchet is prevented. Preferably, the contact position between the operating lever and the ratchet is reached at least at a predetermined end of the angular range of rotation of the operating lever in relation to the ratchet. In this way, the operating lever is rotated in relation to the ratchet for a certain angular interval, without this implying the initial rotation of the latter in relation to the basic body. When the lever reaches the above position of contact with the ratchet, the additional rotation of the operating lever causes the ratchet to rotate completely.
    [0030] The need to rotate the operating lever, in relation to the ratchet before reaching the position of contact with the latter, to cause it to rotate in relation to the basic body of the device, allows the possibility of the undesirable release of the ratchet to be considerably lowered.
    [0031] In fact, in order to lift the ratchet and transfer it to the belt release position, the lever must reach the above mentioned position of contact with the ratchet. As mentioned, the device is also provided with a first elastic means interposed between the ratchet and the basic body to, reversibly, retain the ratchet in at least one position of engagement with the belt, which comprises at least one compressed spring ("loaded") ) in such a way as to keep the ratchet in the position of engagement with the belt, and also allows the regulation of the rotation movement of the ratchet in relation to the basic body, from the position of engagement with the belt to the disengagement position of the same.
    [0032] As already mentioned, second elastic means are also provided to regulate the rotation of the operating lever in relation to the ratchet in the angular rotation interval, comprising a spring that is constructed and pre-compressed in such a way, to keep the operating lever in at least one resting position, not coinciding with the position of contact with the ratchet.
    [0033] In accordance with an aspect of the present invention, the spring preload required to regulate the ratchet rotation movement in relation to the basic body is greater than the maximum spring load necessary to regulate the rotation movement of the operating lever in relation to the ratchet. In other words, the characteristics of the spring elastic response, respectively, adapted to regulate the rotation movement of the ratchet in relation to the basic body, and the rotation movement of the operating lever in relation to the ratchet, are different. In particular, the load applied to the spring, to regulate the rotation movement of the ratchet in relation to the basic body, is greater than the load applied to the spring to regulate the rotation movement of the operating lever in relation to the ratchet.
    [0034] In this way, the operating lever is rotatable in relation to the ratchet, preventing the latter from rotating in relation to the basic body, until reaching the contact position between the operating lever and the ratchet.
    [0035] As a result of this arrangement, when the user wishes to loosen the belt, causing it to be released from the device, he or she acts on the operating lever causing its rotation in relation to the ratchet.
    [0036] Due to the higher preload of the spring acting on the ratchet, during the rotation of the operating lever in relation to the ratchet, the ratchet does not rotate in relation to the basic body of the device, remaining in the position of engagement with the belt.
    [0037] Only after the operating lever has reached the position of contact with the ratchet, the latter is placed in contact with the operating lever, which causes its rotation in relation to the basic body, leaving the position of engagement with the belt, which can thus be removed freely from the device.
    [0038] Some preferred embodiments of the present invention will now be described, purely by way of non-limiting example, with reference to the accompanying drawings, where:
    [0039] Figure 1 is a perspective view of the device according to the present invention with the belt attached to it;
    [0040] Figure 2 is a perspective view of the basic body of the device according to the present invention;
    [0041] Figure 3 is a side sectional view of the device according to figure 1;
    [0042] Figure 4 is a side sectional view of the device according to the present invention with the operating lever in the position of contact with the ratchet;
    [0043] Figure 5 is a side sectional view of the device according to the present invention with the ratchet in the disengaged position of the belt;
    [0044] Figure 6 is an exploded perspective view of the device according to the present invention; and
    [0045] Figure 7 illustrates the device according to the present invention provided with tape-like portions that allow it to be attached to the helmet's hull.
    [0046] With reference to the attached figures, a preferred embodiment of device 1 for fixing and adjusting a belt 10 will now be described, preferably the chin strap used in safety helmets to protect the user's head.
    [0047] As is known, safety helmets, such as those used in the motorcycle and automobile sector, are generally formed from an external hull, usually made of polycarbonate or other thermoplastic resins or composite materials, in which a layer is inserted inside shock-absorbing material (for example, EPS), capable of protecting the user's head in the event of falls and, generally, in the event of impact with surfaces, objects, etc.
    [0048] Below the layer of shock-absorbing material, also called the protective layer, there is usually a "comfort" cover, also called a lining or internal padding, which prevents direct contact between the user's head and the protective layer , and therefore the shock-absorbing material.
    [0049] As can be seen in the perspective view of figure 1, the device 1 for adjusting and securing a belt 10 according to the present invention comprises a basic body 2 constructed to allow the insertion of at least part of the belt 10, and at least one ratchet 3 rotatably attached to the basic body 2 and provided with a coupling portion 4 adapted to engage at least a corresponding portion 11 of the belt 10.
    [0050] As can be seen in figure 7, the device is preferably used to secure and adjust the chin strap, which is generally formed of two ribbon-like parts 50 and 51, attached to the side portions and, optionally, also the portions bottom of the helmet, which are joined and mutually fixed by means of device 1. The two portions of the belt, mutually fixed by means of device 1, can also be adjusted, in length, to allow adaptation to different users. The device is generally attached to one of the two ends of the belt, which takes on a ribbon-like shape.
    [0051] It should be noted from now on in the figures 1 to 6 attached, showing only a part of the belt 10, fixed to a tape-like portion 51, which is secured and adjusted by means of device 1, and which is inserted inside the device and intended to come into contact with the coupling portion 4 of the ratchet 3. Figure 7 also illustrates the second ribbon-like portion 50 of the chin strap, which is attached to the body 2 of the device according to the present invention.
    [0052] Actually, the belt 10 is provided with a portion 11 adapted to assume an engagement position with the corresponding coupling portion 4 of the ratchet 3, in such a way as to cause the fixation within the device.
    [0053] The belt 10 is also provided with means that allow it to be fixed to the tape-like portion 51, and therefore to the helmet, for example, by means of a suitable support 52, in which it is possible to insert the similar portion to a ribbon 51, connected to this belt 10 by means of a rivet (or other similar known means) passing through a hole 12 produced therein.
    [0054] The tape-like portion 51 is fixed to the helmet's hull by known means, such as through rivets through holes provided in connection plate 53, and an optional pull tab 54.
    [0055] Of course, other forms of connection between the belt 10 of the device and a portion of the chin belt, known in the art, can be used.
    [0056] As can be seen in the embodiment illustrated in figures 2 and 6, the basic body 2 comprises an opening 2.1 in the lower surface 2.3 of the same, which allows the device to be fixed to the helmet, for example by means of the other end of the helmet. chin strap, which is attached to the helmet. In particular, opening 2.1 allows to attach to the basic body 2 of the device, a tape-like portion 50 of the belt, shown in figure 7, which in turn is attached to the helmet's hull by known means, such as rivets passing through the holes provided on the connection plate 53, and on an optional pull tab 54 for the opposite side of the helmet hull, in relation to the tape-like portion of the belt 51, for which the portion 11 is intended to be inserted in the device 1 is connected, it is fixed.
    [0057] Of course, other forms of connection between the basic body 2 of the device and a portion of the chin strap, known in the art, can be used.
    [0058] It should be noted that the term coupling portion 4 of the ratchet 3, is intended for any means capable of allowing the insertion of the belt inside the device and, causing the fixation of the same inside this device in at least one position of engagement of the same, and which is at the same time, capable of preventing the extraction of the belt from the device, without the ratchet 3 being moved to at least one disengaging position of the belt 10.
    [0059] In the embodiment illustrated in the accompanying figures, the coupling portion 4 of the ratchet 3 comprises a toothed portion intended to engage the portion 11 of the belt, which also comprises at least one toothed portion.
    [0060] It should be noted now that the term toothed portion is intended for at least a portion of the belt provided with at least one projecting tooth and / or at least one recess adapted to cooperate, respectively, with at least one recess and / or at least one tooth arranged on the toothed surface of the ratchet, in such a way as to reach the engagement position between them.
    [0061] In detail, the ratchet 3 comprises a coupling portion 4 having at least one tooth 4.1 and / or at least one recess 4.2 adapted to cooperate with at least one recess 11.2 and / or at least one tooth 11.1 of the portion toothed 11 of the belt 10. In this way, the ratchet 3 can engage the toothed portion 11 of the belt 10 and prevent its removal.
    [0062] In the embodiment illustrated in the attached figures, the ratchet 3 is provided at the bottom of it with a toothed portion 4, having two teeth 4.1 with a recess 4.2 between them.
    [0063] The toothed portion 11 of the belt 10 is instead provided with a plurality of teeth 11.1 spaced apart by a recess 11.2.
    [0064] Although the specific reference has been made to the present embodiment, in which the ratchet coupling portion 4 comprises a toothed portion adapted to engage the corresponding portion 11 of the belt 10, also toothed, it is possible to provide other methods of fixing the belt, by reaching the engagement position with the coupling portion 4 of the ratchet.
    [0065] For example, the coupling portion 4 of the ratchet 3 can be constructed in such a way as to exert pressure on the corresponding portion 11 of the belt 10, thus preventing its sliding inside the basic body of the device, to avoid the detachment and, consequently, preventing its extraction from the device 1.
    [0066] As can be seen in the side sectional view of figure 3, in which the ratchet is in the position of engagement with the belt, the teeth 4.1 of the toothed portion 4 of the ratchet 3 are in the position of engagement with the toothed portion 11 of the belt 10 and, in particular, are partly inserted into the recesses 11.2, which space the teeth 11.1 of the belt 10.
    [0067] On the other hand, the teeth 11.1 of the portion 11 of the belt 10 are, at least partially, inserted into the recess 4.2 provided between the teeth 4.1 of the coupling portion 4 of the ratchet 3.
    [0068] As shown in the attached figures, teeth 4.1 and 11.1, belonging, respectively, to the toothed portions of ratchet 3 and belt 11, each have an inclined surface and an orthogonal surface, in a "saw teeth" configuration. .
    [0069] It should be noted that in the attached figures teeth 4.1 and 11.1, respectively, of the ratchet 3 and the toothed portion 11 of the belt 10, do not have sharp edges, but are produced with a substantially rounded profile, as described in document EP- A-0772983, to facilitate sliding of the belt during its insertion into the device.
    [0070] When the belt 10 is inserted into the body 2 of the device, it comes into contact with the inclined surfaces of teeth 4.1 of the ratchet 3 and teeth 11.1 of the belt 10, in such a way as to allow sliding on these inclined surfaces of the teeth 4.1 and 11.1. It is evident that the extraction of the belt 10 from the basic body 2 of the device is prevented due to the contact between the orthogonal surfaces of teeth 4.1 of the ratchet 3 and teeth 11.1 of the belt 10.
    [0071] The device according to the present invention, therefore, allows the fine adjustment (or micro-adjustment) of the belt length, due to the different engagement positions that the ratchet toothed coupling portion 4 can reach with the plurality of teeth and / or recesses provided in the portion 11 of the belt 10.
    [0072] In particular, it should be noted that the geometric structure of the teeth section, as well as the pitch of the teeth, can, of course, be modified according to the needs of the construction and, taking into account that through these characteristics, it is it is possible to adjust the coupling between the belt and the ratchet and the performance of the device's tensile strength, that is, the resistance of removing the belt from the device.
    [0073] The ratchet 3 is fixed in a rotating manner to the basic body 2 of the device, in such a way as to be able to reach at least one engaging position with the belt 10 and at least one disengaging position thereof. According to the embodiment illustrated in the attached figures, the ratchet 3 is pivoted over the basic body 2 of the device by means of a pin 30 passing inside the ratchet body 3 in an appropriate manner. The pin 30 is fixed, by means of rivets, not shown, to the basic body 2 of the device through two holes 31 and 32, provided therein, arranged in opposite position in two side walls 2.2 of the basic body 2. The pin 30 allows the ratchet 3 is rotatably attached to the basic body 2. In other words, the ratchet 3 is rotatable around the geometric axis constituted by the pin 30 in relation to the basic body 2 of the device 1. As can be better observed in figure 5, the pin 30 passes through the interior of the ratchet body 3 through a hole 3.2.
    [0074] The device also comprises a first elastic means 20 interposed between the ratchet 3 and the basic body 2 to maintain the ratchet 3, reversibly, in at least one position of engagement with the belt 10, this position being illustrated in the side view in section of figure 3.
    [0075] This elastic means 20 also performs the function of regulating the rotation movement of the ratchet 3 in relation to the basic body 2 of the device and, in particular, it resists the change of the ratchet 3 from the engagement position with the belt 10 in towards its disengaged position (the latter position is shown in the side section in figure 5).
    [0076] According to a preferred embodiment of the present invention, the first elastic means 20 of the device comprises at least one spring, pre-compressed in such a way as to keep the ratchet 3 in the engagement position with the belt 10, and also for allow the ratchet rotation movement 3 to be adjusted in relation to the basic body 2, from the position of engagement with the belt to its disengagement position.
    [0077] The device according to the present invention also comprises an operating lever 5 for rotating the ratchet 3 from the position of engagement with the belt 10 to at least one disengagement position of the same, reversibly, overcoming the resistance of the first elastic means, and in particular of the spring 20, which regulates the rotation movement of the ratchet 3 in relation to the basic body 2.
    [0078] The operating lever 5 is fixed to the ratchet 3 in a rotating manner by at least a certain angular interval. In the embodiment illustrated in the figures, and as can be seen, in particular, in the side sectional view of figures 3-5, the operating lever 5 is pivoted on the ratchet 3 through pin 33, passing through the interior of lever 5, in a circular seat 5.2, and is fixed to specific seats 3.3, by means of knurling and interference, provided in this ratchet 3.
    [0079] The rotation of the operating lever 5 occurs in an angular interval that comprises, at least, a contact position between the operating lever 5 and the ratchet 3, in which the rotation of the operating lever 5 in relation to the ratchet 3 is prevented.
    [0080] Preferably, as shown in the side sectional view of figure 4, the contact position between the operating lever 5 and the ratchet 3 is reached at least one end of the predetermined angular rotation range of the operating lever 5 with respect to to the ratchet 3.
    [0081] In the contact position between the operating lever 5 and the ratchet 3, in the embodiment illustrated in the figures, the upper surface 5.1 of the operating lever 5 comes into contact with a transverse internal surface 3.1 provided in the ratchet 3. It is evident that, after the contact of the upper surface 5.1 of the operating lever 5 with the internal transverse surface 3.1 of the ratchet 3, further rotation of the lever 5 in relation to the ratchet 3 is prevented, and therefore the contact position constitutes an end of the angular rotation range of lever 5 in relation to ratchet 3.
    [0082] Naturally, the contact position between lever 5 and ratchet 3 can be reached in alternative ways to the one described above, although taking into account that this position of rotation of operational lever 5 in relation to ratchet 3 should not be allowed.
    [0083] The device according to a particular aspect of the present invention, also comprises a second elastic means 21 for regulating the rotation of the operating lever 5 in relation to the ratchet 3 in the angular (free) rotation interval, comprising a spring 21, which it is constructed and compressed in such a way as to regulate the rotation of the operating lever 5 in relation to the ratchet 3.
    [0084] Preferably, in the undeformed condition thereof, the spring 21 is adapted to maintain the operating lever 5 in at least one resting position, not coinciding with the position of contact with the ratchet 3.
    [0085] The resting position of operating lever 5, transmitted by the preload of spring 21, is illustrated in figure 3, and corresponds to the position in which the operating lever is in the lowered position, in such a way that it does not protrude from body 2 of the device.
    [0086] In the illustrated embodiment, and as can be seen by comparing figures 3 and 4, the angular interval of rotation of the operating lever 5, is between the position of contact of the lever 5 with the ratchet 3 and the rest position of the lever 5, on which it is lowered. This angular interval of rotation of the operating lever 5 in relation to the ratchet 3 from the rest position to the position of contact with the ratchet, has an amplitude, preferably between 60 ° and 90 °. Even more preferably, this angle has an amplitude of about 85 °.
    [0087] After reaching the contact position, the additional rotation transmitted by the user on the operating lever 5 causes the ratchet 3 to rotate integrally in relation to the basic body 2 of the device.
    [0088] The rotation of the ratchet 3 in relation to the basic body 2 in turn, causes the shift from the engagement position with the belt 10, visible in figure 3, to the disengagement position of the belt 10 (illustrated in figure 5), in which the coupling portion 4 of the ratchet 3 and the corresponding portion 11 of the belt 10 are not in contact and the belt 10 can therefore be freely extracted from the device in the direction of the arrow O.
    [0089] The first elastic means 20, which regulates the rotation movement of the ratchet 3 in relation to the basic body 2 of the device, exerts greater resistance to rotation than the second elastic means 21, which regulates the rotation movement of the operational lever 5 in relation to the ratchet 3.
    [0090] In detail, the preload of the spring 20 necessary to regulate the rotation movement of the ratchet 3 in relation to the basic body 2, is greater than the maximum load of the spring 21 necessary to regulate the rotation movement of the operational lever 5 in relation to the ratchet.
    [0091] In other words, the characteristics of the spring elastic responses 20, 21, respectively, adapted to regulate the rotation movement of the ratchet 3 in relation to the basic body 2, and the rotation movement of the operational lever 5 in relation to the ratchet 3, are different. In particular, the load to be applied on spring 20 to regulate the rotation movement of the ratchet 3 in relation to the basic body 2, is greater than the load to be applied on spring 21 to regulate the rotation movement of the operating lever 5 in relation to to the ratchet 3.
    [0092] In this way, the operating lever 5 is rotatable in relation to the ratchet 3, preventing the rotation of the latter in relation to the basic body 2, until reaching the contact position between the operational lever 5 and the ratchet 3.
    [0093] Consequently, it is possible to prevent the undesirable and accidental operation of the device, due to this need to first operate the operating lever 5, which rotates on its axis 33, initially free in relation to the ratchet 3, and only after reaching the position contact between the operating lever 5 and the ratchet 3, causes the belt 10 to disengage by fully rotating the lever 5 and the ratchet 3, on the latter's pin 30, in relation to the basic body 2 of the device 1.
    [0094] The basic body 2 of the device according to the present invention, is also provided with opposing means 6 to limit the rotation of the ratchet 3 in relation to the basic body 2. According to the embodiment illustrated in the perspective view of figure 2 , the opposing means 6 comprise an internally projecting portion from a lateral surface 2.2 of the basic body 2.
    [0095] The projecting portion 6 is housed in a corresponding seat produced on the external lateral surface of the ratchet 3.
    [0096] When the belt 10 is not inserted into the basic body 2 of the device, the means 6 are opposed to the rotation of the ratchet 3, avoiding the ratchet 3, and, consequently, the operating lever 5 attached to it, rotate due to spring 20, until the contact with the base of the internal surface 2.3 of the body 2.
    [0097] Furthermore, the opposing means 6 make it possible to prevent excessive rotation of the ratchet 3 when it is desired to extract the belt 10 from the device, and the ratchet 3 is lifted after contact with the operating lever 5 towards the disengaged position of the belt 10, as shown in figure 5.
    [0098] Excessive rotation of the ratchet 3 must be avoided, as it can cause tension of the spring 20, resulting in sediment ("yield") and / or subsequent failure.
    [0099] It should be noted that, according to a preferred embodiment, the rotation of the ratchet 3 in relation to the basic body 2 from the position of engagement with the belt to the position of disengagement with the belt, has an amplitude ranging from 5o at 15 °. Preferably, this angle has an amplitude of about 11 °.
    [0100] Naturally, the angles of rotation of the operating lever 5 in relation to the ratchet 3, and of the latter in relation to the basic body 2 of the device, may have a different amplitude from that described here, taking into account that these angles influence the technical-functional characteristics of the device, such as the ease with which the belt is disengaged, also accidentally, and the tractive force that can be obtained when fixing the belt.
    [0101] Generally, the construction and dimensions of the device are such to guarantee the necessary ergonomics to allow simple and effective manual operation of the device.
    [0102] The steps for using the device for fixing and adjusting the chin strap of a safety helmet according to the present invention will now be described, with reference to the particular embodiment of the device for fixing and adjusting a belt 10 described above.
    [0103] When the user puts on a safety helmet, in particular for motorcycling, current legislation states that the chin strap must be fixed and adjusted in length in such a way that it substantially adheres to the throat or, in any case, the part of the face below the user's chin.
    [0104] The belt 10 is inserted into the basic body 2 of the device, as indicated by the arrow I in figure 3, and the coupling portion 4 of the ratchet 3 enters the engaging position with the portion 11 of the belt 10.
    [0105] In detail, in the embodiment illustrated in the figures, and particularly in the side sectional view of figure 3, which illustrates the ratchet in the position of engagement with the belt 10, the coupling portion 4 of the ratchet 3, which is toothed, cooperates with the corresponding portion 11 of the belt 10, also toothed.
    [0106] As already mentioned above, the structure of the teeth of the ratchet 3 and the belt 10 makes this possible to avoid the extraction of the latter from the basic body of the device without the ratchet being raised, causing the reach of at least one position release of the belt 10, as shown in figure 5.
    [0107] It should be noted that the presence of the toothed portion both on the ratchet 3 and on the belt 10, allows the fine adjustment of the chin belt length for the user. In fact, by inserting the belt into the body of the device, the ratchet reaches different engagement positions with it, obtaining the "micrometric" length adjustment.
    [0108] As will be evident in this point of the description, the insertion of the belt 10 inside the body 2 of the device and, subsequently, the engagement with the teeth of the portion 11 of the belt, is obtained by means of a temporary ratchet rotation 3 in relation to the basic body, around the pin 30. In other words, during the insertion of the belt, the ratchet 3 is temporarily raised, overcoming the action of the spring 20, which tends to keep the ratchet 3 in the lowered position engaged with the belt 10 .
    [0109] This operation causes lever 6 to be activated without the relative rotation between operational lever 5 and ratchet 3.
    [0110] After adjusting the length of the belt by gradually inserting it into the body of the device, the coupling portion 4 of the ratchet 3 is in the engaged position with the portion 11 of the belt 10, as shown in figure 3 In this position, the extraction of the belt is prevented by the ratchet, and in the specific case, by the geometric structure of the teeth of the belt 10 and the ratchet 3, and can only occur after the ratchet 3 is lifted until reaching its disengaged position from the belt 10.
    [0111] It should also be noted that, in this position, the device is particularly compact, due to the fact that the operating lever 5 is fixed directly to the ratchet 3.
    [0112] In addition, it should be noted that the operating lever is held in the rest position by means of the action of spring 21, which tends to keep this operating lever 5 in the lowered position (as shown in figure 3), preventing lever 5 accidentally operated.
    [0113] Furthermore, it should be noted that the body 2 of the device is appropriately formed to facilitate insertion of the toothed portion 11 of the belt 10 therein. Particularly, below the side walls 2.2, the body 2 of the device has, seen in a cross section, an increase in its width, in such a way as to form a kind of guide that facilitates the insertion and extraction of the belt 10 inside and the body 2 of the device.
    [0114] In addition, all edges of the body 2, the ratchet 3, the operating lever 5 and, in general, all the components of the present device, are rounded to avoid accidental engagement with the user and, in particular, with his clothing. When the user wants to unscrew the belt 10 and remove it from the device, he or she acts manually on the operating lever 5, causing it to rotate in relation to the ratchet 3, in which it is fixed, in relation to the pin 33 of the same. The user overcomes the preload of spring 21, which would tend to keep lever 5 in the rest position. Operational lever 5 is rotated until it reaches the position of contact with the ratchet 3, as shown in figure 4.
    [0115] In this position, the rotation of the operating lever 5 is prevented by the contact of the upper surface 5.1 of the same, with the internal transverse surface 3.1 of the ratchet 3.
    [0116] It should be noted that the lower portion of the operating lever 5 is suitably provided with projecting portions, and / or wedge-shaped elements, or the like, in order to guarantee a firm grip for the user's fingers, preventing the slip during the opening of the device and therefore during the rotation of the operating lever 5.
    [0117] In addition, the ratchet 3, which is generally made of aluminum, has two side notches 3.4, in the front portion of it, visible in figure 6, which facilitate the assembly of the ratchet 3 inside the basic body 2 of the device, which would otherwise be complicated, given the presence of the opposite means 6 on the inner wall of the side of the basic body 2.
    [0118] As previously mentioned, before reaching the contact position, rotating the operating lever 5 in relation to the ratchet 3 made by the user, does not cause the ratchet 3 to rotate in relation to the basic body 2 of the device, such as the preload of the spring 20 interposed between the ratchet and the basic body 2, necessary to operate the ratchet 3, is greater than the maximum load of the spring 21 necessary to regulate the rotation movement of the operating lever 5 in relation to the ratchet 3.
    [0119] In other words, the elastic characteristics of the springs 20, 21 are such that the load applied to the spring 20 to regulate the rotation movement of the ratchet 3 in relation to the basic body 2 is greater than the load applied to the spring 21 to regulate the rotation movement of the operating lever 5 in relation to the ratchet 3.
    [0120] Consequently, only after reaching the contact position between operational lever 5 and ratchet 3, as shown in figure 4, the user is able to continue his rotation action on lever 5, also to cause rotation of the ratchet 3 in relation to the basic body 2 of the device, on its pin 30, thus causing the ratchet 3 to move from the position of engagement with the belt 10 (figure 3) to the disengagement position of the same, as shown in figure 5 .
    [0121] It is evident that in this position, the belt can be freely removed from the device, in the direction indicated by the arrow O in figure 5, as the coupling portion 4 of the ratchet 3 is no longer engaged with the corresponding portion 11 of the belt 10.
    [0122] The need to reach a contact position between operating lever 5 and ratchet 3, allows the safety of the fixing device to be considerably improved. In fact, the possibility of accidentally rotating the ratchet 3, and consequently causing the belt 10 to disengage, is considerably reduced.
    权利要求:
    Claims (17)
    [0001]
    1. Device for fixing and adjusting a safety helmet strap, of the type comprising at least one basic body (2) built to allow the insertion of at least part of the strap (10), at least one ratchet (3) fixed in a shape rotatable to said basic body (2) and provided with at least one coupling portion (4), adapted to engage at least one corresponding portion (11) of said belt (10), and first elastic means (20) interposed between said ratchet (3) and said basic body (2) to, reversibly, retain said ratchet (3) in at least one engaging position with said belt (10, said device (1) also comprising at least an operating lever (5) for rotating at least one said ratchet (3) from at least one said engaging position with said belt (10), to at least one disengaging position of said belt (10), reversibly, overcoming the resistance of the aforementioned first elastic medium o (20), characterized by the fact that the aforementioned operating lever (5) is fixed on said ratchet (3) in a rotating form by at least a certain angular interval.
    [0002]
    2. Device, according to claim 1, characterized by the fact that the said angular interval of rotation of the aforementioned operating lever (5), in relation to said ratchet (3), comprises at least one contact position of the said operating lever ( 5) with said ratchet (3), the rotation of said operational lever (5) in relation to said ratchet (3) being prevented in said contact position.
    [0003]
    Device according to claim 2, characterized by the fact that at least one said position of contact between said operating lever (5) and said ratchet (3) is reached, at least at one end of said angular rotation range predetermined operating lever (5) in relation to said ratchet (3).
    [0004]
    4. Device according to any one of claims 1 to 3, characterized in that the said ratchet (3) comprises at least one internal transverse surface (3.1) that engages, at least on the upper surface (5.1) of said operating lever (5) in said contact position of said angular interval of rotation of the operating lever (5) in relation to the ratchet.
    [0005]
    5. Device according to claim 1, characterized in that said first elastic means (20) comprises at least one spring pre-compressed in such a way to keep said ratchet (3) in said engaging position with said belt (10), rotating said ratchet (3) in relation to said basic body (2) from at least one said position of engagement with said belt (10) to at least one said disengagement position with said belt ( 10) being regulated by said spring.
    [0006]
    6. Device, according to any one of claims 1 to 5, characterized by the fact that it comprises a second elastic means (21) to regulate the rotation of said operating lever (5) in relation to said ratchet (3) in at least one mentioned angular rotation range.
    [0007]
    Device according to claim 6, characterized in that said elastic means (21) for regulating the rotation of said operating lever (5) in relation to said ratchet (3) comprises at least one spring.
    [0008]
    8. Device according to claim 7, characterized by the fact that at least one spring (21) for regulating the rotation of said operating lever (5) in relation to said ratchet (3) in its undeformed condition is adapted to maintain the aforementioned operating lever (5) in at least one resting position, which does not coincide with the aforementioned contact position with the said ratchet (3).
    [0009]
    Device according to any one of claims 5 and 7, characterized by the fact that the elastic characteristics of at least one mentioned spring (20) for regulating the rotation movement of said ratchet (3) in relation to said basic body ( 2) and at least one said spring (21) to regulate the rotation movement of said operating lever (5) in relation to said ratchet (3), being different, such that the load applied to at least one said spring (20) to regulate the rotation movement of the said ratchet (3) in relation to the said basic body (2) to be greater than the load applied in the mentioned spring (21) to regulate the rotation movement of the said operating lever (5) in relation to said turnstile (3).
    [0010]
    Device according to any one of claims 1 to 9, characterized in that it comprises opposing means (6) for limiting the rotation of said ratchet (3) in relation to said basic body (2).
    [0011]
    11. Device according to claim 1, characterized by the fact that the said angular interval of rotation of said operating lever (5) with respect to said ratchet (3) from at least one said resting position to at least one mentioned position of contact with said ratchet (3), have an amplitude between 60 ° and 90 °.
    [0012]
    12. Device according to claim 1, characterized by the fact that the rotation of at least one said ratchet (3) in relation to the said basic body (2), from at least one said position of engagement with said belt ( 10) for at least one said disengagement position of said belt (10) to have an amplitude between 5 ° and 15 °.
    [0013]
    13. Device according to any one of claims 1 to 12, characterized in that at least one said coupling portion (4) of said ratchet (3) is a toothed portion and thereby said belt (10) comprises at least one toothed portion (11) adapted to engage with said toothed coupling portion of said ratchet (3).
    [0014]
    14. Device according to claim 13, characterized in that at least one cited toothed portion (4) of said ratchet, comprises at least one tooth (4.1) and / or at least one recess (4.2) adapted to engage to at least one corresponding recess (11.2) and / or at least one corresponding tooth (11.1) produced on at least one cited toothed portion (11) of said belt (10).
    [0015]
    15. Device according to claim 14, characterized by the fact that at least one tooth (4.1, 11.1) and / or at least one recess (4.2, 11.2) of said toothed portion (4, 11) of said ratchet ( 3) and said belt (10) are constructed in such a way as to avoid extraction of said belt (10) from the basic body (2), when said ratchet (3) is in at least one said position of engagement with said belt (10).
    [0016]
    16. Device according to any one of claims 1 to 15, characterized in that said belt (10) is a chin strap.
    [0017]
    17. Safety helmet, characterized by the fact that it comprises at least one chin strap and at least one device (1) for fixing and adjusting at least one mentioned chin strap, as defined in any of claims 1 to 16.
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    同族专利:
    公开号 | 公开日
    US20130031702A1|2013-02-07|
    JP6112798B2|2017-04-12|
    ES2467995T3|2014-06-13|
    BR102012001013A2|2013-07-30|
    AU2012205155A1|2013-02-21|
    JP2013036159A|2013-02-21|
    KR20130016071A|2013-02-14|
    US9332798B2|2016-05-10|
    AU2012205155B2|2016-03-31|
    EP2554066B1|2014-03-05|
    KR101870451B1|2018-07-19|
    EP2554066A1|2013-02-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    AT372259B|1979-06-13|1983-09-26|Sesamat Anstalt|TENSION LEVER LOCK FOR SHOES, ESPECIALLY SKI BOOTS|
    EP0242531A1|1986-04-18|1987-10-28|Lange International S.A.|Closure means for shoes and ski boot provided therewith|
    JPH0531926Y2|1986-12-27|1993-08-17|
    US4796336A|1987-08-05|1989-01-10|The United States Of America As Represented By The Secretary Of The Army|Two part buckle|
    DE3841832A1|1988-01-28|1989-08-10|Artur Foehl|LOCKING DEVICE FOR THE CHIN STRAP OF A MOTORCYCLE PROTECTIVE HELMET|
    IT223068Z2|1990-11-19|1995-06-09|Everest Off|STRUCTURE OF CLAMPING DEVICE, PARTICULARLY FOR FOOTWEAR|
    US5416952A|1994-01-27|1995-05-23|Burton Snowboards|Ratchet-type buckle|
    DE69517180T2|1995-11-09|2001-02-22|E D C Sarl|Clamping device for toothed chin straps of protective helmets, in particular motorcycle helmets|
    US5606779A|1996-05-28|1997-03-04|Monotype Supply Co., Ltd.|Microscopically adjustable buckle for shoes|
    CA2206074A1|1996-05-30|1997-11-30|Bauer Italia S.P.A.|A device for adjusting and clamping the toothed strap of a fastening for sports footwear|
    US5779259A|1996-06-14|1998-07-14|Lin; Jack|Toe-strap of a ski boot binding|
    AT210395T|1996-07-23|2001-12-15|Bauer Italia Spa|DEVICE FOR CLAMPING A LEVER CLOSING TOOTHED BAR, IN PARTICULAR FOR A CLOSING DEVICE FOR SPORTSHOES|
    IT236439Y1|1997-02-04|2000-08-17|Giuseppe Cavasin|CLAMPING DEVICE, ESPECIALLY FOR SPORTS SHOES|
    IT1291408B1|1997-02-04|1999-01-11|Dolomite Spa|LEVER LACING DEVICE|
    US6195848B1|1998-08-14|2001-03-06|Usa Products|Slidable ratchet tensioning device and tie-down assembly|
    US6116580A|1999-07-13|2000-09-12|Dutton-Lainson Company|Reversible winch ratchet mechanism|
    FR2809778B1|2000-05-30|2002-09-06|Salomon Sa|RATCHET DEVICE FOR HOLDING A STRIP|
    DE60104541T2|2000-05-31|2004-12-30|K-2 Corp., Vashon|BUCKLE WITH LOCKING LINK FOR SNOWBOARD BINDING|
    US6374464B1|2000-07-25|2002-04-23|Chin-Kuo Lai|Buckle with fine adjustment means|
    ITPD20010151A1|2001-06-19|2002-12-19|Bauer Italia Spa|TOOTHED BELT LACING, PARTICULARLY FOR HELMETS, HELMETS AND SIMILAR OILERS.|
    US6772447B2|2002-08-30|2004-08-10|Stryke Lacrosse, Inc.|Protective sport helmet|
    US7246383B2|2004-05-27|2007-07-24|Bell Sports, Inc.|Fit adjustment mechanism for helmets|
    ITTV20050053U1|2005-10-25|2007-04-26|Emmepi Srl|CLOSING DEVICE, PARTICULARLY FOR A SPORTS FOOTWEAR|
    US7571520B2|2006-12-08|2009-08-11|Qbas Co., Ltd.|Adjustable buckle|
    US7877845B2|2007-12-12|2011-02-01|Sidi Sport S.R.L.|Controlled-release fastening device|
    US7966701B2|2008-06-05|2011-06-28|Qbas Co., Ltd.|Adjustable ratchet buckle|
    GB0911711D0|2009-07-06|2009-08-19|Abdul Yaragi|Fastening device|
    US8763211B1|2013-03-04|2014-07-01|Cheng-Che Yu|Binding belt-based rod member clamping device|US9155359B1|2013-09-16|2015-10-13|Dennis Morgan Bailey|Ratchet buckle with locking mechanism|
    JP6204768B2|2013-09-18|2017-09-27|株式会社谷沢製作所|helmet|
    JP6297810B2|2013-10-16|2018-03-20|株式会社オージーケーカブト|buckle|
    CN103610582B|2013-11-25|2015-04-29|深圳市倍轻松科技股份有限公司|Head massager and interval adjusting structure thereof|
    KR101430435B1|2014-03-26|2014-08-14|장태욱|Buckle device|
    IL236216A|2014-12-11|2016-03-31|Ehud Kantor|Airway opening mechanism for helmets and a helmet comprising the same|
    FR3030291B1|2014-12-19|2020-02-07|Skis Rossignol|ADJUSTMENT ASSEMBLY INCLUDING A RETAINING LINK AND A LOCKING DEVICE FOR HOLDING A SHOE ON A SPORTS MACHINE|
    US9566499B2|2015-02-07|2017-02-14|Daniel C. Sullivan|Binding strap assist mechanism with a torsion spring|
    US10618730B2|2015-03-02|2020-04-14|Grigooris MANSSOURIAN|Retainer mechanism|
    USD799125S1|2015-03-25|2017-10-03|Aaron + Amanda Holdings, Inc.|Animal identification band|
    US10154704B1|2015-04-17|2018-12-18|Desmark Industries, Inc.|Helmet slide assembly|
    CA3025383A1|2016-06-03|2017-12-07|Joseph Ray SIMPSON|Secure fit quick release belt system and method for use|
    KR101950979B1|2017-07-27|2019-02-22|써보레|Headband for mask|
    US10070701B1|2017-11-06|2018-09-11|Bo Cai Enterprise Co., Ltd.|Buckle device|
    KR101847448B1|2017-12-29|2018-04-10|류양석|Buckle|
    EP3925473A4|2020-06-19|2021-12-22|Dainese Spa|Closure buckle for a strap of a protective helmet and closing method for a strap of a protective helmet|
    US11089831B1|2020-10-23|2021-08-17|DoubleThree, LLC|Incrementally adjustable and pivotable semi-rigid retention strap for a helmet|
    法律状态:
    2013-07-30| B03A| Publication of an application: publication of a patent application or of a certificate of addition of invention|
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2020-06-23| B09A| Decision: intention to grant|
    2020-09-01| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 16/01/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP11006380.7|2011-08-03|
    EP11006380.7A|EP2554066B1|2011-08-03|2011-08-03|A device for regulating and fastening a strap of protecting helmets|
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