• 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:
    SUMMARY A projector screen support (2) is described comprising a support structure (5) with at least one guide means (6, 7) defining a longitudinal axis (8, 9) which is to be arranged substantially vertically and a screen holder support (10) for holding a projector screen. 10) is arranged movable along the longitudinal axis (8, 9), defined by the at least one guide means (6, 7). The projector screen support (2) also comprises counterbalancing means arranged to apply a force directed upwards on the screen holder support (10) relative to the support structure (10). 5). The counterbalancing means comprises at least two constant force springs (13) each generating a predetermined force, the springs (13) being attachable / releasable at at least one end without the use of any tool, so that the total force from the counterbalancing means easily can be varied by attaching or releasing springs (13). Fig. 3
    公开号:SE1000770A1
    申请号:SE1000770
    申请日:2010-07-16
    公开日:2012-01-17
    发明作者:Slobodan Konjhodzic；Jonas Haakansson；Ali Nekzada
    申请人:Sms Smart Media Solutions Ab；
    IPC主号:
    专利说明:

    15 20 25 The screen surface and the short-distance projector are height-adjustable by means of two elongate actuators, which can be controlled mechanically or electrically, for example by remote control.
    PCT / US2005 / 000930 describes interactive display systems comprising a support frame having a vertical positioning element which counteracts the weight of an attached interactive display. The vertical positioning element comprises hydraulic or pneumatic devices such as pistons and gas springs.
    US 3,822,848 discloses a screen holder of the type with a wall-mounted bracket and provides manual adjustment of the screen in a vertical direction.
    Summary of the Invention An object of the present invention is to provide a height-adjustable projector screen support, which is an alternative to prior art projector screen supports.
    Another object of the present invention is to provide a height-adjustable projector screen support for a projector screen which includes counterbalancing means for counterbalancing the weight of the screen and which is easily adjustable in height.
    A further object of the present invention is to provide a height-adjustable projector screen support, for a screen and a short-distance projector, which includes counterbalancing means for balancing the weight of the screen and the projector, the force from the counterbalancing means being easily adjustable. Yet another object of the present invention is to provide a height-adjustable projector screen system, with a screen and a projector for short distances, which comprises counterbalancing means for balancing the weight of the screen and the projector, the power from the counterbalancing means being simple. - terbart. At least one of the above objects is fulfilled with a projector screen support according to claim 1.
    Additional advantages of the invention are provided by the features of the dependent claims.
    According to a first aspect of the invention, a projector screen support is provided. The projector screen support comprises a support structure with at least one guide means defining a longitudinal axis which is to be arranged substantially vertically. The projector screen support also includes a screen holder support for holding a projector screen, which screen holder support is arranged movably along the longitudinal axis, defined by said at least one guide means, relative to said at least one guide means on the support structure. The projector screen support also comprises counterbalancing means arranged to apply a force directed upwards on the screen holder support in relation to the support structure. The projector screen support is characterized in that the counterbalancing means comprises at least two constant force springs, each of which generates a predetermined force.
    The springs are attachable / removable at at least one end without the use of any tool, so that the total force from the counterbalancing means can be easily varied by fitting or releasing springs. 10 15 20 25 30 With a projector screen support according to the first aspect of the invention, the force from the counterbalancing means can be adapted to different weights on the projector screen.
    The projector screen support is specially designed for use with short distance projectors. For this purpose, the screen holder support may also comprise an arm extending substantially perpendicular to the longitudinal axis defined by the at least one guide means. The arm can be arranged for arranging a projector for a short distance.
    With such an arm, the projector for a short distance can easily be arranged fixed in relation to the screen. It is especially important to have the power from the counterbalancing means variable when having a projector screen as well as a projector arranged on the screen holding means as the weight may vary within a larger range with such an arrangement compared to the case of having only one projector screen arranged on the screen holder support.
    The constant force springs can be roller-shaped coil springs, each of which has a roller shaft, the roller shafts being arranged substantially parallel to each other. Such springs are readily available and provide a substantially constant force regardless of their extent. Such springs are in the form of a roller with a free end which can be extended from the roller in a straight line.
    With constant force springs in the form of roller-shaped coil springs, the roller-shaped coil springs can comprise springs of at least two different strengths, ie. which generate forces of at least two different sizes. With such an arrangement, the force from the counterbalancing means can be changed in finer steps.
    The roller-shaped coil springs can be arranged fixedly in relation to the screen holder support and arranged attachable / releasable in relation to the support structure, without the use of any tool. It is of course possible to have it in the opposite way with the roller-shaped coil springs fixed in relation to the support structure. It is advantageously the free end which is fixedly arranged.
    The support structure may comprise at least one shelf on which the roller-shaped coil springs may be arranged rotatably about their roller shafts. Having the roll-shaped coil springs arranged on such a shelf provides an easy attachment / release of the roll-shaped coil springs. It is of course possible to have a separate shelf for each of the roller-shaped coil springs.
    The shelf may comprise a longitudinal axis which is arranged substantially perpendicular to the longitudinal axis defined by said at least one guide means and wherein the roller-shaped coil springs are arranged to be placed on the shelf with their roller axes substantially parallel to the longitudinal axis of the shelf. The longitudinal axis of the shelf is advantageously also parallel to a projector screen arranged on the screen holder support.
    In a cross section perpendicular to the longitudinal axis of the shelf, the shelf can be bent upwards in the outermost part of the shelf so that the roll-shaped coil springs are prevented from rolling off the shelf.
    With such an arrangement, the roll-shaped coil springs are prevented from rolling off the shelf while they are still easily attachable / releasable from the shelf.
    The side of the shelf which is arranged to be in contact with the roller-shaped coil spring may be provided with contact means which provides low friction between the roller-shaped coil spring and the contact means. The contact means may be of some suitable material which provides low friction against the roller-shaped coil spring. The support structure may be arranged to be attached to a wall. Alternatively, such as some plastic. the support structure can be arranged on a base for placement on a floor.
    According to a second aspect of the present invention there is provided a projector system. The projector system comprises a projector screen support according to any one of the preceding claims, a projector screen and a projector. With such a projector system, the power from the counterbalancing means can be easily adjusted to the weight of the projector screen and the projector.
    In the following, preferred embodiments of the invention will be described with reference to the accompanying drawings.
    Brief Description of the Drawings Fig. 1 is a rear perspective view of a projector system according to an embodiment of the present invention comprising a projector screen support, Fig. 2 a projector screen and a projector. is a front perspective view of the projector screen support in the projector system shown in Fig. 1.
    Fig. 3 detail.
    Fig. 4 Fig. 5 Fig. 4.
    Fig. 6 Fig. 5 shows a part of the projector screen support in Fig. 2 in a larger front view of the projector screen support. is a cross-sectional view of the projector screen support along DD i is a cross-sectional view of a portion of the projector screen support i 10 15 20 25 30 Description of Preferred Embodiments of the Invention In the following description of preferred embodiments of the invention, similar elements or features in various figures will be designated by same reference numeral. It should be noted that the drawings are not to scale.
    Fig. 1 is a rear perspective view of a projector system 1 according to an embodiment of the present invention comprising a projector screen support 2, a projector screen 3 and a projector 4. The projector screen support 2 comprises a support structure 5 with two control means 6, 7, which define longitudinal axes 8, 9, which are to be arranged substantially vertically. The projector screen support 2 also comprises a screen holder support 10 for holding the projector screen 3, which screen holder support 10 is arranged movably along the longitudinal axes 8, 9, which are defined by the control means 6, 7, in relation to the control means 6, 7, on the support structure 5. In the embodiment shown, the screen holder support 10 comprises two rails 11,12, which are arranged in the guide means 6,7. It is of course possible to arrange the rails on the support structure 5 and the guide means 6, 7, on the screen holder support 10.
    The projector screen support 2 also comprises counterbalancing means arranged to apply a force directed upwards on the screen holder support 10 in relation to the support structure 5. In the embodiment shown, the counterbalancing means comprise seven constant force springs in the form of roll-shaped coil springs 13 which each produce a predetermined force. In the embodiment shown, the roll-shaped coil springs are attached to the shield holder support at one end while the other ends of the roll-shaped coil springs 13 are in the form of rollers which are in contact with the support structure so that the roll-shaped coil springs can apply an upward force. on the screen holder support 10 in relation to the support structure 5. The arrangement with the roller-shaped helical springs 13 on the support structure 5 will be shown in greater detail in Fig. 3 and Fig. 4.
    The screen holder support 2 also comprises an arm 14 which extends substantially perpendicular to the at least one guide means 6, 7. The arm is arranged for arranging a projector 4 for a short distance.
    Fig. 2 is a front perspective view of a projector screen support 2 similar to that shown in Fig. 1. Fig. 3 shows a part of the projector screen support 2 in Fig. 2 in greater detail. The support structure 5 comprises a number of roller-shaped coil springs 13 of different sizes with roller shafts 17. The roller-shaped coil springs of different sizes have different strengths, i.e. they generate forces of different sizes. The support structure 5 comprises a shelf 16 on which the roller-shaped coil springs can be arranged rotatably about their roller shafts 17.
    The shelf 16 comprises a longitudinal axis 18 which is arranged substantially perpendicular to the longitudinal axes 8, 9, defined by the guide means 6, 7, and wherein the roller-shaped coil springs 13 are arranged on the shelf with their roller shafts 17 substantially parallel to the longitudinal axis of the shelf 16 18. In Fig. 2 and Fig. 3, three of the roll-shaped coil springs are arranged on the shelf 16. The roll-shaped coil springs can be easily attached / released from the shelf 16 without the use of any tools. Thus, the total force from the counterbalancing means can be easily varied by attaching or releasing springs from the shelf 16. This makes it possible to vary the force from the counterbalancing means depending on the weight of the projector and the projector screen.
    Fig. 4 is a front view of the projector screen support 2. Fig. 5 is a cross-sectional view of the projector screen support 2 along D-D in Fig. 4.
    Fig. 6 is a cross-sectional view of a portion of the projector screen support of Fig. 5. In a cross-section perpendicular to the longitudinal axis 18 of the shelf 16, the shelf 16 is bent upwardly into the outermost portion 19 of the shelf 16 so that the coil springs 13 are prevented from rolling of the shelf 16. The side 20 of the shelf 16 which is in contact with the roll-shaped coil spring 13 is provided with contact means 21 which provide low friction between the roll-shaped coil spring 13 and the contact means 21. The contact means may be some kind of plastic which provides low friction between the roller-shaped coil spring 13 and the contact means.
    The support structure 5 may be arranged to be attached to a wall. Alternatively, the support structure may be arranged to be attached to a base to be placed on the floor.
    The described embodiments can be modified in many ways without departing from the spirit and scope of the present invention which is limited only by the appended claims.
    It is possible to have any number of roll-shaped coil springs. It is not necessary to have a common shelf for all the roll-shaped coil springs. It is possible to have a shelf for each of the roller-shaped coil springs.
    In the embodiments shown, the axes of the roll-shaped coil springs are arranged parallel to the projector screen. However, it is possible to arrange the axes of the coiled coil springs perpendicular to the projector screen.
    权利要求:
    Claims (8)
    [1]
    Projector screen support (2) comprising a support structure (5) with at least one guide means (6, 7) defining a longitudinal axis (8, 9) which is to be arranged substantially vertically, a screen holder support (10) for holding a projector screen (3 ), which screen holder support (10) is arranged movably along the longitudinal axis (8, 9), defined by said at least one guide means (6, 7) relative to said at least one guide means (6, 7) on the support structure (5), and counterbalancing means arranged applying a force directed upwards on the screen holder support (10) relative to the support structure (5), the support structure (5) having a fastening surface and arranged to be attached to a wall with the fastening surface against the wall, the counterbalancing means comprising at least two constant force springs (13), in the form of roller-shaped coil springs (13), each of which has a roller shaft (17), the roller shafts (17) being arranged substantially parallel to each other and each of which generates a predetermined force, characterized characterized in that the coil springs (13) are attachable / releasable at at least one end without the use of any tool, by moving said end away from the fastening surface, so that the total force from the counterbalancing means can be easily varied by attaching or releasing springs (13), wherein the roller-shaped coil springs (13) comprise springs of at least two different strengths, i.e. which generate forces of at least two different sizes.
    [2]
    A projector screen support (2) according to claim 1, wherein the screen holder support (5) also comprises an arm (14) extending substantially perpendicular to said at least one guide means (6, 7), the arm (14) being arranged to provide a projector (4) for a short distance. 10 15 20 25 ll
    [3]
    Projector screen support (2) according to claim 2, wherein the roller-shaped coil springs (13) are arranged fixed in relation to the screen holder support (10) and are arranged attachable / releasable in relation to the support structure (5), without the use of any tool. .
    [4]
    Projector screen support (2) according to claim 3, wherein the support structure (5) comprises a shelf (16) on which the roller-shaped coil springs (13) can be arranged rotatably about their roller shafts (17).
    [5]
    A projector screen support (2) according to claim 4, wherein the shelf (16) comprises a longitudinal axis (22) which is arranged substantially perpendicular to the longitudinal axis (8, 9) defined by said at least one guide means (6, 7) and wherein the roller-shaped coil springs (13) are arranged to be placed on the shelf (16) with their roller shafts (17) substantially parallel to the longitudinal axis (22) of the shelf (16).
    [6]
    Projector screen support (2) according to claim 5, wherein the shelf (16) in a cross section perpendicular to the longitudinal axis (22) of the shelf (16) is bent upwards in the outermost part of the shelf (16) so that the roll-shaped coil springs (13) are prevented from rolling off the shelf (16).
    [7]
    Projector screen support (2) according to claim 6, wherein the side (20) of the shelf (16) which is arranged to be in contact with the roller-shaped coil spring (13) is provided with contact means (21) which provide low friction between the roller-shaped coil spring ( 13) and the contact means (21).
    [8]
    Projector system (1), comprising a projector screen support (2) according to any one of the preceding claims, a projector screen (3), and a projector (4).
    类似技术:
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    同族专利:
    公开号 | 公开日
    US20130114048A1|2013-05-09|
    WO2012008897A1|2012-01-19|
    EP2593834A1|2013-05-22|
    SE535940C2|2013-02-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    US20050184215A1|2004-02-19|2005-08-25|Lin Yu-Sen|Spiral spring for a liquid crystal display stand|
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    SE538712C2|2013-01-25|2016-10-25|Sms Smart Media Solutions Ab|Height adjustable display monitor support|
    US9140963B2|2013-03-09|2015-09-22|Spec Ops, Inc.|Portable projector and screen support system having foldable frame assembly|
    CN107355658B|2017-07-21|2019-02-19|重庆高铁计量检测有限公司|A kind of projector mount application method|
    US10436381B2|2017-10-23|2019-10-08|Qingdao Hisense Laser Display Co., Ltd.|Wall-hung bracket for projection screen|
    WO2019079932A1|2017-10-23|2019-05-02|青岛海信电器股份有限公司|Wall-mounting bracket for projection screen|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1000770A|SE535940C2|2010-07-16|2010-07-16|Height adjustable projector screen support|SE1000770A| SE535940C2|2010-07-16|2010-07-16|Height adjustable projector screen support|
    PCT/SE2011/050648| WO2012008897A1|2010-07-16|2011-05-25|Height adjustable projector screen support|
    US13/810,631| US20130114048A1|2010-07-16|2011-05-25|Height adjustable projector screen support|
    EP11807141.4A| EP2593834A1|2010-07-16|2011-05-25|Height adjustable projector screen support|
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