• 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 invention relates to a projection screen comprising a series of arcs (1a-d) between which a fabric-like material can be arranged. The arches are rotatably connected to two hubs (3-4) which are connectable to a stand, where the arches can be rotated between folded and folded position. The hub comprises at least one lower stop (7) which prevents the frames from leaving the collapsed position and where the hub can be rotated so that the lower stop is displaced out of position so that the frames can be rotated to the folded position. This means that all the lower arches (lb, d) fall out of their own weight when the upper arches (la, c) are folded up. In one embodiment, the hub (3-4) comprises an arc fastening part (3) and an arc stop part (4) which are rotatably connected to each other. The arch mounting part (3) may comprise an upper stop (6) which the uppermost arch (1a) reaches in the fully filled position. In this position, the upper arc can, by action against the upper stop, cause the arc mounting part (3) to be rotated relative to the arc stop part (7) so that the lower arc (1b) passes the lower stop (7). In a further embodiment, the arch fastening part (3) comprises arc locking devices (9a-b, 10a-b) for locking the outermost arches (1a-b) in the fully raised position. The invention also relates to such a projection screen where the arch mounting part (3) can be fixed to the arch stop part (4) at one of several fixed angular positions with a rotary locking device (11-114). 6/7
    公开号:SE0901199A1
    申请号:SE0901199
    申请日:2009-09-18
    公开日:2011-03-19
    发明作者:John Nilsson
    申请人:Division By Zero Ab；
    IPC主号:
    专利说明:

    The invention also relates to such a projection screen where the arch mounting part 3 can be fixed to the arch stop part 4 at one of your fixed angular positions with a rotary locking device 11-14.
    Brief description of the figures Fig. 1 shows a partial exploded view of a hub with arches according to the invention seen from the inside. Fig. 2 shows a partial exploded view of the hub with arches according to the invention seen from the outside. Fig. 3 shows the hub with the arches in fully collapsed position. Fig. 4 shows the hub with the upper frames in the partially raised position. Fig. 5 shows the hub with the upper frames in the fully raised position. Fig. 6 shows the hub with the upper and lower frames in the fully raised position. Fig. 7 shows the hub with the frames turned to a user position. Description of the preferred embodiment Fig. 1 shows a partial exploded view of a hub 3-4 with arcs 1a-d according to the invention seen from the inside. The hub with the arches is intended to be used with a stand that holds two hubs in position a distance above the floor, with the two hubs in front of each other and parallel to each other. Between the hubs extends a series of arcs la-d. The stand can be folded so that the hubs approach each other and the arches then extend approximately un-formed between the two hubs. The stand can be folded out to a bumks position when the hubs, still arranged parallel to each other and in the middle of each other, are at a longer distance from each other so that the arches form approximately semicircular elements.
    Between the arches there is a fabric or a fabric-like material arranged which allows the greatest possible distance between adjacent arches. The mat can be folded and at the same time allows the arches to be folded so that they lie edge to edge with each other. The position is not illustrated here, but keeps the hub in position a suitable distance above the floor. The fabric-like material forms an approximately hemispherical projection screen.
    The hub 3-4 comprises an arch fastening part 3 and an arc stop part 4 which are normally rotatably assembled, but in the illustrated partial exploded view are separated to clarify construction details. The arch attachment part 3 is flat and has an arcuate edge along which the arches 1a-d are rotatably attached. In the unloaded state, the arches are flat, mainly rectangular elements which in the collapsed state are arranged edge to edge with each other and extend parallel to each other. The arches are of different lengths, with the longest arches arranged in the middle and the shortest at the far end. The outermost arcs 1a-b are stronger than the others and are called upper 1a and lower 1b outer arcs. While the middle arches end slightly about the attachment points around which they are rotatably attached, the outermost arches extend a bit further in the opposite direction to the main extent of the arches and these portions are called the end portion of the upper 8a and lower 8b outer arc.
    With the hub mounted separately in the manner illustrated in the exploded view, all the frames can be rotated around their attachment points. The upper half of the arcs 1a, c are intended to be turned upwards and the lower lb, d half of the arcs are intended to be turned downwards and would here fall downwards by their own weight, so that they together form a hemisphere. However, the arch stop part 4 is designed to prevent the lower half of the arches from being turned down by their own weight. The arc stop part 4 is rotatably fastened with the arc fastening part 3 about an axis 5. The arc stop part comprises a flat surface which extends over the greater part of the outside of the arc fastening part, i.e. the side facing from the other hub, but does not reach all the way to the arches. The arc stop part comprises a lower stop 7, which are angled at right angles from the arc stop part. The lower stop 7 of the arc stop part is arranged so that it rests against the upper edge of the outer portion 8b of the lower outer arc 1b. The lower stop of the arc stop part thus normally prevents the lower outer arc from being turned downwards, since this would require the outer portion 8b of the lower outer arc 1b to be forced past the lower stop. In addition, the lower stop of the arc stop part prevents the entire arc fastening part 3 with arches from being turned downwards by its own weight.
    When the arches are to be folded up to a spherical shape, the upper outer arc 1a is manually turned upwards and the mat then automatically pulls with the rest of the upper half of the arcs upwards.
    The folding process is illustrated more clearly in fi g. 3-6. The two outer arches have on their end portions 8a-b from the arc mounting part slightly angled ends which resiliently press against the arc mounting part. At these resilient ends there are rods arranged on the upper 9a and lower 9b heads. The rods extend to the arch attachment part and press against it. With the heads 9a-b, the rods can be pulled out a bit so that they no longer press against the arch attachment part. When the upper outer arch has reached its uppermost position, the rod on the upper head 9a reaches an upper arch locking hole 10a in the arch attachment part and 3 is pushed by its spring action into it, so that the upper outer arch is locked in position.
    With the arches in this position, the arch attachment part and the arches can then be forced to be rotated further, which means that the uppermost outer arch presses against an upper stop 6 arranged on the upper edge of the arch attachment part.
    The upper stop 6 is arranged with the arches collapsed parallel to the outer portion 8a of the upper outer arc and is angled from the arc mounting part in the same direction as the lower stop, i.e. outwards from the interior of the hemisphere. When the upper outer arch is pressed against the edge of the upper stop 6, the entire arch attachment part is forced to rotate relative to the arch stop part 4. The lower part 8b of the lower outer arch then leaves the lower stop, so that the lower outer arch can be turned downwards by its own weight. With the lower outer arch then follows all the others of the lower half of the arches ld. With all the lower arches 1b, d lowered, the rod on the lower head 9b reaches a lower arc lock hole 10b and is pushed by its spring action into it, so that the lower outer arc is locked in position.
    With all the arcs in the fully filled position, these form the skeleton in a hemisphere and between the arcs an even hemisphere is formed on which images can be projected. After folding up, the entire hemisphere can be rotated and attached at the desired angle. This process is more clearly illustrated in fi g. 7, but is also described here. On the shaft 5 around which the arch mounting part 3 and the arch stop part 4 are rotatably fastened, an arm 11 is also rotatably arranged. The arm extends over the arch attachment portion and is at the end facing the shaft slightly angled from the arch attachment portion. At this end there is a third head 12 with a rod. The rod is resiliently arranged and presses against the arch attachment part. With its head, the rod can be lifted from the arch attachment part.
    Along a part of a circle with the center in the axis 5 a series of holes 13 are arranged. The rod on the third head 12 is normally arranged in one of these holes 13. The entire hemisphere can now be rotated further so that the rod passed through one of these holes reaches a corresponding single hole 14 on the arc stop part 4 and locks the arc mounting part at an angle relative to the arc stop part. By pulling up the third head 12, the arm can be rotated so that the rod is fastened in another hole 13 on the arch fastening part. Thereafter, the arcuate portion may be rotated relative to the arc stop portion until the rod on the third head again reaches the hole 14 on the arc stop portion and the device is fixed at a different angle. back to normal. Then the rods on the upper and lower heads 9a-b are loosened so that the two outer arches can be turned in and the remaining arches then follow. The upper arches 1a, c then remain in the folded position of their own weight, while the lower arches are locked by the lower outer arch. The end portion 8b of the lower outer arch 1b first reaches the lower stop which is slightly obliquely cut and slides over this oblique foam edge before it springs down beyond the stop.
    Fig. 2 shows on another scale a partial exploded view of the hub with arcs according to the invention seen from the outside. Here, in addition to the part of the arch stop part which extends parallel to the arch attachment part, a scaffold receiver 15-18 is also illustrated which is designed to receive a cross-section square rod on the scaffold which holds the entire hemisphere in position above the floor.
    The stand receiver comprises two side support portions 15-16 which are angled at right angles from the part of the arc stop part which extends parallel to the arc yeast part and extends parallel to each other. The bar on the scaffold is intended to be received between these parts. From one of these side support portions there are two further portions 17-18 which are angled at right angles from the side support portion. One of these portions 18 together with the side support portions forms part of a tube enclosing the rod and the other forms a lid 17 which prevents the whole device from sliding down over the scaffold.
    Fig. 3 shows the hub with the arches in full folded position. The two components of the hub, the arc mounting part 3 and the arc stop part 4 are rotatably fastened in the groove and all the arches extend in one arc from the attachment points on the arc mounting part and towards the other hub which is not illustrated. The entire device is held in position by a position not illustrated with posts, one of which is inserted into the position receiver on the hub which is arranged on the side of the hub seen from the viewer. The upper arches 1a, c are in position of their own weight and rest against the lower arches. The lower half of the arches 1d rests edge to edge with each other on the lower outer arch 1b which is locked in position of the lower stop 7.
    Fig. 4 shows the hub with the upper arches in a partially folded position. In this position, the upper outer frame has been raised a bit and is angled 45 degrees from the storage position. Three of the upper half of the frames 1c have accompanied the upper outer frame with the fabric arranged between the frames. The fabric is not illustrated.
    Fig. 5 shows the hub with the upper arches in the fully raised position. The upper outer arch is here angled at right angles to the rest position and the rod in the upper head 9a has snapped into the upper arc locking hole 10a.
    All the upper frames are now locked in position.
    Fig. 6 shows the hub with the upper and lower arches in fully raised position. This position has been reached by pressing the upper outer arch against the upper stop 6. In this way the arch attachment part is forced to rotate relative to the arch stop part so that the end portion 8b of the lower outer arch 1b passes the lower stop 7.
    When this has happened, all the lower arches 1b, d of their own weight fall down and the rod on the lower head 9b locks in the lower arc locking hole 10b. All the arches are now locked in a fully raised position and form the skeleton in a hemisphere.
    Fig. 7 shows the hub with the arches turned to a user position. This position is reached by turning the whole hemisphere so that the rod on the third head 12 reaches the hole 14 on the arc stop part 4 so that the whole hemisphere locks in position with the selected direction. The direction is chosen in the way that best suits the user, depending on body length and desired viewing direction.
    权利要求:
    Claims (6)
    [1]
    Claim 1 A projection screen comprising a series of arches (1a-d) between which a fabric-like material can be arranged, wherein the arches are rotatably connected to two hubs (3-4) which are connectable to a stand, where the arches can be rotated between folded and collapsed position, characterized in that the hub comprises at least one lower stop (7) which prevents the arches from leaving the collapsed position and where the hub can be rotated so that the lower stop is displaced out of position so that the arches can be rotated to the folded position.
    [2]
    A projection screen according to claim 1, characterized in that the hub (3-4) comprises an arc mounting part (3) and an arc stop part (4) which are rotatably connected to each other.
    [3]
    A projection screen according to claim 2, characterized in that the arc mounting part (3) comprises an upper stop (6) which the upper arc (1a) reaches in a fully filled position and where the upper arc in this position can be obtained by action against the upper stop. the arc mounting part (3) to be rotated relative to the arc stop part (7) so that the lowest arc (1b) passes the lower stop (7).
    [4]
    A projection screen according to claim 2 or 3, characterized in that the arc fastening part (3) comprises arc locking devices (9a-b, 10a-b) for locking the outermost arches (1a-b) in a badly striking position.
    [5]
    A projection screen according to any one of claims 2-4, characterized in that the arc fastening part (3) can be fixed to the arc stop part (4) at one of f your fixed angular positions with a rotary locking device (11-14).
    [6]
    A projection screen according to any one of claims 2-5, characterized in that the arc stop part (4) comprises a scaffold receiver (15-18) which is designed to receive a rod on a scaffold.
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    同族专利:
    公开号 | 公开日
    SE535260C2|2012-06-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE0901199A|SE535260C2|2009-09-18|2009-09-18|projection Screen|SE0901199A| SE535260C2|2009-09-18|2009-09-18|projection Screen|
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