• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present disclosure relates to a height adjustment arrangement (100) for an ear cup in a hearing protector unit, wherein the height adjustment arrangement (100) comprises an elongated member (130) and a tubular holding member (110) connected to the elongated member, wherein the holding member provides a substantially hollow interior (111). The height adjustment arrangement further comprises a clamping member (120), wherein the clamping member is arranged to be moved from an unlocked position, in which position relative movement between the elongated member (130) and the holding member (110) is enabled, to a locking position, in which position relative movement between the elongated member and the holding member is prevented. The holding member (110) comprises a first locking member (114), wherein the second end of the holding member is provided with two flanges (115a, 115b) tapering in a direction towards the clamping member, and wherein the first locking member and the flanges are axially separated. The clamping member comprises a hollow interior with a tapering part, which tapers in a direction away from the holding member, and a second locking member, wherein the tapering part and the second locking member are axially separated.
    公开号:SE1051313A1
    申请号:SE1051313
    申请日:2010-12-14
    公开日:2012-06-15
    发明作者:Thomas Isaksson；Anders Roos
    申请人:Msa Sordin Ab；
    IPC主号:
    专利说明:

    15 20 25 30 2 extended position of the height adjustment arrangement, irrespectively which height of the ear cups the user tries to set. | .e. the friction force trying to hold the ear cup at a certain height becomes less than the force of gravity provided by the ear cup. Thereby, the ear cups are not correctly positioned at the user's ears, resulting in that the sound-attenuating function of the hearing protector unit will be significantly impaired. This problem may be extra significant for electronic hearing protector units which contain heavy batteries that may increase the force of gravity reverse of the friction force during use of the hearing protector unit. Further, such problem will make the hearing protector unit very uncomfortable for the user due to the unsatisfactory fit. The same problem may be caused by differences in production tolerances of the steel wire and the holder. A small difference in the thickness of steel wires for such height adjustment arrangements would cause different friction forces between a steel wire and a holder. Therefore, a very small tolerance in the steel wire diameter is needed to secure a correct friction force when arranged to the holder.
    Consequently, there is a need for a height adjustment arrangement for the ear cups in a hearing protector unit that provides a reliable solution also over long time use.
    Summary lt is an object of the present invention to provide an improved solution that alleviates the mentioned drawbacks with present devices. Furthermore, it is an object to provide a height adjustment arrangement for an ear cup in a hearing protector unit that is not sensitive to wear of the parts in the arrangement.
    According to a first aspect of the invention, this is achieved by a height adjustment arrangement for an ear cup in a hearing protector unit, wherein the height adjustment arrangement comprises an elongated member adapted to be coupled in a first end to a head mounting portion of a hearing protector unit, and a tubular holding member connected to the elongated member, the tubular holding member being adapted to be coupled in a first end to an ear cup, wherein the holding member provides a substantially hollow interior 10 15 20 25 30 3 adapted to receive a second end of the elongated member. A relative movement between the elongated member and the holding member provides a height adjustment of an ear cup relative to a head mounting portion. The height adjustment arrangement further comprises a ciamping member, wherein the ciamping member is arranged to be moved from an uniocked position, in which position relative movement between the elongated member and the holding member is enabled, to a locking position, in which position relative movement between the elongated member and the holding member is prevented.
    Since the ciamping member may prevent the relative movement between the holding member and the elongated member in a locking position, and enable the same movement in an uniocked position, the arrangement may not be sensitive to wear of the parts in the arrangement. Contrary the prior art solution where the arrangement both enables relative movement of the parts, and holds the parts in a set position at the same time, only a little wear to the parts would cause the arrangement to lose the function of holding the parts in a set position. When the ciamping member is in the uniocked position, the holder may be moved relative to the elongated member. Thereby the ear cup may be moved relative to the elongated member and the head mounting portion. When a wanted position of the holder and ear cup relative to the elongated member is reached, the ciamping member may be moved to the locking position. Thereby, the set position of the holder and ear cup is fixed relative the elongated member. A head mounting portion may be a headband connected to the height adjustment arrangement. The head mounting portion may alternatively be a helmet or the like, adapted to be worn by a user, and connected to the height adjustment arrangement. Further, with an arrangement according to the invention, larger tolerances for the elongated member diameter may be possible, since two different positions of the clamping member enables or prevents the movement between the elongated member and the holding member. The elongated member may be a wire member, such as a steel wire. ln an embodiment, the ciamping member may be adapted to, when in the locking position, be attached to the holding member such that the 10 15 20 25 30 4 clamping member presses a second end of the holding member towards the elongated member to prevent relative movement between the elongated member and the holding member.
    By pressing an end portion of the holding member against the elongated member the friction between the holding member and the elongated member may be increased to a level such that the relative movement between the two members is prevented. A friction force between the holding member and the elongated member that is much larger than the gravity force by the ear cups may prevent the gravity force for affecting the position of the holding member relative to the elongated member. The friction force may be of an amount such that a user cannot move the holder relative to the elongated member by hand. ln a further embodiment, the amount of force with which the clamping member may press the second end of the holding member towards the elongated member may be adjustable.
    Thereby, the friction force between the holding member and the elongated member may be adjustable. A continuous movement from the unlocked position to the locking position may be achieved. By achieving a continuous adjustment of the friction force, a position of the clamping member may be possible where relative movement between the holding member and the elongated member is enabled at the same time as the holding member may be held in a set position by the set friction force. The friction force is thereby larger than the gravity force, but a user may move the holding member relative to the elongated member by overriding the friction force. lf the holding member and / or the elongated member may be worn out such that the friction force is reduced, the clamping member may, due to the continuous adjustability, be adjusted such that the friction force may be increased again. In another embodiment, the holding member may be provided with at least one slit at the second end of the holding member.
    A slit at the end of the tubular shaped holding member may provide that the circumference of the holding member may be flexible and may be compressed. Thereby, a larger friction force may be achieved when the 10 15 20 25 30 5 clamping member presses the end of the holding member towards the elongated member. In a further embodiment, the holding member may be provided with two slits at the second end of the holding member.
    Thereby, the circumference of the holding member may become even more flexible and may be more easily compressed when being pressed against the elongated member. An Iargerfriction force may thereby be achieved by the clamping member pressing the holding member towards the elongated member. ln one embodiment, the two slits may provide two flanges at the second end of the holding member, wherein the clamping member may be adapted to, in the locking position, be attached to the holding member such that the clamping member may press the two flanges at the second end of the holding member towards the elongated member to prevent movement of the elongated member relative to the holding member.
    Due to the slits, the fl notes may be flexible such that they may be movable in a radial direction of the holding member. Thereby, the clamping member may press the fl indicated towards the elongated member to prevent the relative movement between the holding member and the elongated member.
    The elongated member may extend between the two flanges. In a further embodiment, the clamping member may radially press the holding member towards the elongated member.
    The elongated member extending through the tubular holding member may be prevented from movement relative to the holding member when the holding member may be radially pressed towards the elongated member. The holding member may be resilient such that it may be pressed radially towards the elongated member. In another embodiment, the clamping member may be arranged to, when moved from the unlocked position to the locking position, move along an axial direction of the elongated member.
    The clamping member may be coaxial with the elongated member.
    The clamping member may thereby move along the extension of the elongated member when moving between the unlocked position and the 10 15 20 25 30 6 locking position. The clamping member may further be coaxial with the holding member and move along an axial direction of the holding member when moving from the unlocked position to the locking position. ln one embodiment, a hollow interior of the clamping member may taper in a direction away from the holding member.
    Thereby, when the clamping member is moved from the unlocked position towards the locking position, there may be a gradual pressing action by the clamping member on the holding member. The tapering inner surface of the clamping member may provide that the holding member is pressed harder towards the elongated member the further towards the locking position the clamping member is moved. In another embodiment, the second end of the holding member tapers in a direction toward the clamping member.
    Thereby, a more even gradual pressing action by the clamping member on the holding member may be achieved. The flanges may taper towards the end of the holding member. In one embodiment, the holding member may be provided with a first locking member and the clamping member may be provided with a second locking member arranged to integrate with said first locking member when the clamping member is moved from said unlocked position to said locking position.
    By providing a locking member on each of the holding member and the clamping member, the clamping member may be kept in the locking position by means of the locking members integrating with each other. When securing that the clamping member is kept in the locking position, the friction force in the locking position may be secured. Thereby the set position of the holding member relative to the elongated member may be kept. Further, by unlocking the locking members from each other, the clamping member may be moved from the locking position. Thereby, the clamping member may be moved to the unlocked position such that the holding member may be moved relative to the elongated member. The first locking member and the second locking member may be separated from each other when the clamping member is in the unlocked position. 10 15 20 25 30 7 ln a further embodiment, the first looking member may be outer threads on the holding member and the second looking member may be inner threads in an interior of the clamping member, said outer and inner threads may be adapted for thread engagement with each other.
    When moving the clamping member from the unlocked position to the looking position, the inner and outer threads may engage along with the clamping member moving along the axial direction of the elongated member.
    The clamping member may thereby be screwed onto the holding member, pressing the holding member radially towards the elongated member. The clamping member may be screwed onto the holding member until it locks the clamping member in the looking position. By unsorewing the clamping member from the holding member, releasing the threaded engagement between the looking members, the clamping member may be moved to the unlocked position, enabling relative movement between the holding member and the elongated member. ln a yet further embodiment, the pressing force by the clamping member on the second end of the holding member towards the elongated member may be adapted to increase along with an increased threaded engagement between the clamping member and the holding member.
    By screwing the clamping member onto the holding member, the friction force between the holding member and the elongated member may increase until a friction force needed for preventing relative movement between the holding member and the elongated member is reached. lf either of the holding member and / or the elongated member would be worn out, the threaded engagement between the clamping member and the holding member may be tightened to compensate for the wear. An adjustable friction force may thereby be provided by the threaded engagement of the looking members. The further the clamping member may be screwed onto the holding member, the harder the holding member may be pressed towards the elongated member. The adjustable friction force may further be used to compensate for a high tolerance in elongated member diameter. In another embodiment, the first and second looking members together form a bayonet coupling. 10 15 20 25 30 8 The clamping member may thereby in an alternative way be locked to the holding member in the Iocking position. The clamping member and the holding member may respectively be provided with corresponding parts of a bayonet coupling. The bayonet coupling may be released to be able to move the clamping member to the unlocked position.
    According to a second aspect of the invention, a hearing protector unit may be provided comprising at least one ear cup, a head mounting portion and at least one height adjustment arrangement for said ear cup according to any of the claims 1-14. The height adjustment arrangement may be connected with a first end to the head mounting portion and with a second end to the at least one ear cup.
    A hearing protector unit may thereby be achieved where the ear cup may be adjusted in height relative to the head mounting portion to a position most suitable for a user. The ear cup may be held in that position in a secure way.
    Brief Description of the Drawinqs The invention will in the following be described in more detail with reference to the enclosed drawings, wherein: Fig 1 is a perspective view of a hearing protector unit according to an embodiment of the invention.
    Fig 2 is a perspective view of a holder and a nut cap according to an embodiment of the invention.
    Fig. 3a is a cross-sectional schematic side view of a height adjustment arrangement according to an embodiment of the invention.
    Fig. 3b is a cross-sectional schematic side view of a height adjustment arrangement according to an embodiment of the invention.
    Fig. 4 is a perspective view of a height adjustment arrangement according to an embodiment of the invention.
    Description of Embodiments The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of 10 15 20 25 30 9 the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, like numbers refer to like elements.
    Fig 1 illustrates a hearing protector unit 1 adapted to attenuate sound when put on a user's head and over a user's ears. The hearing protector unit 1 comprises two ear cups 10, 20 adapted to be located over the user's ears.
    A correct placement of the ear cups 10, 20 is crucial for achieving the best sound-attenuating function by the ear cups 10, 20. The ear cups 10, 20 are coupled to each other via a head band 30. The head band 30 is adapted to be placed on the user's head. In an alternative embodiment, the ear cups 10, 20 could be coupled to a helmet. Between the headband 30 and each ear cup 10, 20 there is a height adjustment arrangement 100, 200 provided. Since it is important that the ear cups 10, 20 are placed in a correct way over the user's ears, the ear cups 10, 20 need to be adjustable in height relative to the headband 30. Each height adjustment arrangement 100, 200 is in one end connected to an ear cup 10, 20, and in another end connected to the headband 30.
    The height adjustment arrangement 100 comprises, as illustrated in fig 2 and 3a, a holder 110, a nut cap 120 and a steel wire 130. The holder 110 is tubular and has a hollow interior 111 that is adapted to receive a second end 132 of the steel wire 130. At a second end 112 of the holder 110, there are two slits extending in the longitudinal extension direction of the holder, which is the same as the longitudinal direction of the steel wire 130. The two slits thereby form two flanges 115a, 115b. The fl specified 115a, 115b are flexible in a radial direction. Below the fl anger 115a, 115b at the second end 112 of the holder 110, there is a first locking member in the form of outer threads 114. At a first end 113 of the holder 110, the holder 110 is adapted to be connected to an ear cup 10.
    The nut cap 120 is provided with an opening 124 at one end adapted to receive the steel wire 130 into a hollow interior 121 of the nut cap 120. The interior 121 of the nut cap 120 has a tapering part 123 and a locking member 10 15 20 25 30 10 part that is provided with inner threads 122. The inner threads 122 of the nut cap 120 are adapted to integrate with the outer threads 114 of the holder 110.
    When the nut cap 120 is separated from the holder 110, i.e. when the inner threads 122 and the outer threads 114 are not engaged, the nut cap 120 is in an unlocked position. The unlocked position of the nut cap 120 enables movement of the steel wire 130 relative to the holder 110. The steel wire 130 can then be pushed further into the hollow interior 111 of the holder, or pulled out of the holder 110. When the steel wire 130 is pushed or pulled such that it is moved relative to the holder 110, the height of the ear cup 10 is adjusted relative to the head band 30 of the hearing protector unit 1.
    When the nut cap 120 is screwed onto the holder 110 by engaging the threads 114, 122 with each other, the tapering part 123 of the interior of the nut cap 120 comes into contact with the fl specified 115a, 115b on the holder 110. When the nut cap 120 comes into contact with the fl angles 115a, 115b, the nut cap 120 presses the flanges 115a, 115b radially towards the steel wire 130 that passes between the, angles 115a, 115b. The steel wire 130 will be clamped between the two flanges 115a, 115b. Due to the tapering shape of both the tapering part 123 in the nut cap 120 and the fl anger115a, 115b, the pressing of the fl anger 115a, 115b towards the steel wire 130 will increase gradually along with the nut cap 120 being screwed onto the holder 110 Thereby, the force provided by the nut cap 120 pressing the holder 110 towards the steel wire 130 will continuously increase when the nut cap 120 is engaged with the holder 110. When the force increases, the friction between the holder 110, ie the fl specified 115a, 115b, and the steel wire 130 increases.
    Eventually the friction will be of such amount that the steel wire 130 is locked relative to the holder 110. The nut cap 120 is thereby in a locking position, preventing a relative movement between the steel wire 130 and the holder 110.
    Fig 3b illustrates the engagement between the nut cap 120 and the holder 110 such that the steel wire 130 is clamped between the flanges 115a, 115b of the holder 110. When the steel wire 130 is clamped between the flanges 115a, 115b and the nut cap 120 has been screwed in a direction A onto the holder such that it is moved along a direction C and has reached the 10 15 20 25 30 11 locking position, the steel wire 130 and the holder 110 is prevented from movement relative to each other. lf the nut cap 120 is Ioosened from the locking position by turning it in a direction B (see fig 4), the pressing force on the fl anger 115a, 115b will be decreased. When the pressing force is decreased, the steel wire 130 may be moved in any of the directions C or D (see fig 4) relative to the holder 110. Since the pressing force on the steel wire 130 is continuously adjustable, the force may be set to provide a friction force between the steel wire 130 and the holder 110 such that a user may override that friction force by pushing or pulling the steel wire 130 to adjust the height of the ear cup 10, and at the same time the friction force is large enough to hold the ear cup 10 in the set height position. The height adjustment arrangement 100 may thereby be used in the same way as prior art solutions, with the advantage that when wear of the parts in the arrangement decreases the friction force, the needed friction force may easily be reestablished by adjusting the engagement between the nut cap 120 and the holder 110.
    Fig 4 illustrates a height adjustment arrangement 100 for an ear cup 10 on a hearing protector unit 1, where a second holder 140 and a second nut cap 150 are arranged on the steel wire 130. Afirst end 131 of the steel wire 130 is adapted to be connected to the head band 30 on the hearing protector unit 1. The first holder 110 and the first nut cap 120 are arranged at the second end 132 of the steel wire 130. The second holder 140 and the second nut cap 150 are arranged at a third end 133 of the steel wire 130 in a similar way as the first holder 110 and first nut cap 120 at the second end 132. The first holder 110 and the second holder 140 are both adapted to be connected to respective sides of the same ear cup 10. One or both of the holders 110, 140 may be moved relative to the steel wire 130 when adjusting the height of the ear cup 10 by turning the first and the second nut caps 120, 150, such that the friction force between the holders 110, 140 and the steel wire 130 is decreased and the holders 110, 140 can be moved relative to the steel wire.
    The fist holder 110 and the second holder 140 may, by means of the first nut cap 120 and the second nut cap 150, be fixed to the steel wire 130 at different heights. 10 12 ln the drawings and specification, there have been disclosed preferred embodiments and examples of the invention and, although specific terms are employed, they are used in a generic and descriptive sense only and not for the purpose of Iimitation, the scope of the invention being set forth in the following claims.
    权利要求:
    Claims (15)
    [1]
    1. Height adjustment arrangement (100) for an ear cup (10) in a hearing protector unit (1), the height adjustment arrangement comprising an elongated member (130) adapted to be coupled in a first end (131) to a head mounting portion (30) of a hearing protector unit, and a tubular holding member (110) connected to the elongated member, the tubular holding member being adapted to be coupled in a first end (113) to an ear cup (10), where the holding member provides a substantially ho | ow interior (111) for receiving a second end (132) of the elongated member (130), wherein a relative movement between the elongated member (130) and the holding member (110) provides a height adjustment of an ear cup (10) relative to a head mounting portion (30), characterized in that the height adjustment arrangement (100) further comprises a clamping member (120), wherein the clamping member (120) is arranged to be moved from an unlocked position, in which position relative movement between the elongated member (130) and the holding member (110) is enabled, to a locking position, in which position relative movement between the elongated member (130) and the holding member (110) is prevented.
    [2]
    2. Height adjustment arrangement according to claim 1, wherein the clamping member (120) is adapted to, when in the locking position, be attached to the holding member (110) such that the clamping member presses a second end (112) of the holding member towards the elongated member (130) to prevent relative movement between the elongated member and the holding member.
    [3]
    Height adjustment arrangement according to claim 2, wherein the amount of force with which the clamping member (120) presses the second 10 15 20 25 30 14 end (112) of the holding member (110) towards the elongated member (130) is adjustable.
    [4]
    Height adjustment arrangement according to any of the claims 2-3, wherein the holding member (110) is provided with at least one slit at the second end (112) of the holding member.
    [5]
    Height adjustment arrangement according to any of the claims 2-4, wherein the holding member (110) is provided with two slits at the second end (112) of the holding member.
    [6]
    Height adjustment arrangement according to claim 5, wherein the two slits provides two flanges (115a, 115b) at the second end (112) of the holding member (110), and where the clamping member (120) is adapted to, in the locking position, be attached to the holding member (110) such that the clamping member presses the two flanges at the second end of the holding member towards the elongated member (130) to prevent movement of the elongated member relative to the holding member.
    [7]
    Height adjustment arrangement according to any of the claims 2-6, wherein the clamping member (120) is adapted to radially press the holding member (110) towards the elongated member (130).
    [8]
    8. Height adjustment arrangement according to any of the preceding claims, wherein the clamping member (120) is arranged to, when moved from the unlocked position to the locking position, move along an axial direction of the elongated member (130).
    [9]
    9. Height adjustment arrangement according to any of the preceding claims, wherein a hollow interior (121) of the clamping member (120) tapers in a direction away from the holding member (110). 10 15 20 25 30 15
    [10]
    10. Height adjustment arrangement according to any of the preceding claims, wherein the second end (112) of the holding member (110) tapers in a direction towards the clamping member (120).
    [11]
    11. Height adjustment arrangement according to any of the preceding claims, wherein the holding member (110) is provided with a first Iocking member (114) and the clamping member (120) is provided with a second Iocking member (122) arranged to integrate with said first Iocking member when the clamping member is moved from said uniocked position to said Iocking position.
    [12]
    12. Height adjustment arrangement according to claim 11, wherein said first Iocking member is outer threads (114) on the holding member (110) and said second Iocking member is inner threads (122) in an interior of the clamping member (120), said outer and inner threads are adapted for threaded engagement with each other.
    [13]
    13. Height adjustment arrangement according to claim 12, wherein the pressing force by the clamping member (120) on the second end (112) of the holding member (110) towards the elongated member (130) is adapted to increase along with an increased threaded engagement between the clamping member and the holding member.
    [14]
    14. Height adjustment arrangement according to claim 11, wherein the first and second Iocking members (114, 122) together form a bayonet coupling.
    [15]
    15. Hearing protector unit (1) comprising at least one ear cup (10, 20), a head mounting portion (30) and at least one height adjustment arrangement (100, 200) for said ear cup according to any of the claims 1 -14, the height adjustment arrangement being connected with a first end to the head mounting portion (30) and with a second end to the at least one ear cup (10, 20).
    类似技术:
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    同族专利:
    公开号 | 公开日
    CN103458839A|2013-12-18|
    EP2651355A4|2014-10-08|
    US9414965B2|2016-08-16|
    EP2651355A1|2013-10-23|
    CN103458839B|2015-04-29|
    US20130340769A1|2013-12-26|
    EP2651355B1|2018-05-09|
    SE535582C2|2012-10-02|
    BR112013014888A2|2016-09-13|
    WO2012082047A1|2012-06-21|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1051313A|SE535582C2|2010-12-14|2010-12-14|Height adjustment device for a hearing aid in a hearing protector|SE1051313A| SE535582C2|2010-12-14|2010-12-14|Height adjustment device for a hearing aid in a hearing protector|
    BR112013014888A| BR112013014888A2|2010-12-14|2011-10-07|height adjustment arrangement and hearing protection unit|
    US13/994,044| US9414965B2|2010-12-14|2011-10-07|Height adjustment arrangement for an ear cup in a hearing protector unit|
    CN201180060542.2A| CN103458839B|2010-12-14|2011-10-07|Height adjustment arrangement for an ear cup in a hearing protector unit|
    EP11848298.3A| EP2651355B1|2010-12-14|2011-10-07|Height adjustment arrangement for an ear cup in a hearing protector unit|
    PCT/SE2011/051210| WO2012082047A1|2010-12-14|2011-10-07|Height adjustment arrangement for an ear cup in a hearing protector unit|
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