There is provided a window screen configured in such a manner that first and second screens are wound around a winding shaft together with a number of dimming slats attached therebetween in which bottom bars of lower ends of both screens come into stable contact with a lower frame of a screen frame.
There is provided a window screen configured in such a manner that first and second screens are wound around a winding shaft together with a number of dimming slats attached therebetween in which bottom bars of lower ends of both screens come into stable contact with a lower frame of a screen frame. The first and second screens and the slats attached therebetween at regular intervals so as to be freely tiltable are wound around the winding shaft, both side ends of the first screen engage guide rails so as to be freely slidable, and bottom bars guided individually by side frames are attached to lower ends of both screens. Both screens are set so that either one of the bottom bars at the lower ends thereof comes into contact with the lower frame of the screen frame in an arbitrary inclined orientation that the above-described slats may have in a state in which both screens are extended in the screen frame in a tensed manner.
대표청구항▼
1. A window screen with a blind function comprising: a screen unit, the screen unit including: a translucent first screen configured to be wound upward by a winding shaft;a translucent second screen configured to be wound by the winding shaft together with the first screen in an overlapped manner; a
1. A window screen with a blind function comprising: a screen unit, the screen unit including: a translucent first screen configured to be wound upward by a winding shaft;a translucent second screen configured to be wound by the winding shaft together with the first screen in an overlapped manner; anda number of slats for dimming or light-shielding having a constant width and coupled between the first screen and the second screen, the slats being coupled at first and second ends thereof to both the first and second screens at regular intervals so as to be freely tiltable, and having flexibility so as to be capable of being wound by the winding shaft together with the first and second screens, whereinin the screen unit, one end of each of the first and second screens is attached to a peripheral surface of the winding shaft so as to allow the first and second screens to be wound in an overlapped manner,the first screen includes a number of engaging strips attached thereto along left and right side end portions, the engaging strips being engaged in slits of a guide rail on each of two side frames of a screen frame so as to be freely slidable,the first and second screens are provided with first and second bottom bars attached individually to lower ends thereof, at least the first bottom bar attached to the lower end of the first screen is disposed in first guide grooves of the side frames to guide a vertical movement of both ends thereof, andthe first and second screens have length set so that either one of the bottom bars at the lower ends thereof comes into contact with a lower frame of the screen frame in an arbitrary inclined orientation that the slats can have in a state in which both the first and second screens are extended in the screen frame in a tensed manner. 2. The window screen with a blind function according to claim 1, wherein the first and second screens are attached to the winding shaft so as to have a dimensional relationship so that a downward movement of both the first and second screens by an unwinding rotation of the winding shaft brings the first and second bottom bars to the lower frame of the screen frame simultaneously, or the first bottom bar does not reach the lower frame before the second bottom bar, and then brings the second screen to a reverse winding state with respect to the winding shaft to move the second screen upward with respect to the first screen, whereby the respective slats are formed so as to be capable of having an inclined orientation moving upward and downward on a second screen side in a state in which either one of the first and second bottom bars is in contact with the lower frame. 3. The window screen with a blind function according to claim 2, wherein both the first and second screens are attached to the winding shaft so as to have a dimensional relationship such that a number of the slats coupled respectively to both the first and second screens suspend the second screen with respect to the first screen when both the first and second screens move downward by the unwinding rotation of the winding shaft, whereby the second screen and the second bottom bar at the lower end thereof are supported by the first screen and suspend therefrom. 4. The window screen with a blind function according to claim 3, wherein the slats have coupling margins having a certain width in a width direction on both first and second ends thereof for coupling the first and second screens, andthe screen unit is formed in such a manner that when the slats are disposed between the first and second screens so as to overlap with each other and form a planar shape, each slat is coupled to the second screen at a position where a coupling margin of the slat with respect to the second screen overlaps with a coupling margin on one side of an adjacent slat coupled to the first screen. 5. The window screen with a blind function according to claim 4, wherein the vertical the second bottom bar includes first and second ends, and movement of both first and second ends of the second bottom bar attached to the lower end of the second screen is guided by second guide grooves for the second bottom bar provided in proximity to the first guide grooves for the first bottom bar formed on the side frames, both first and second guide grooves formed in proximity in a range in which the first and second bottom bars do not come into contact with each other. 6. The window screen with a blind function according to claim 4, wherein the second bottom bar includes first and second ends, and second guide grooves on the side frames configured to guide the vertical movement of both first and second ends of the second bottom bar attached to the lower end of the second screen are provided in proximity to the first guide grooves for the first bottom bar formed on the side frames,in a lower portion of the second guide grooves, both first and second ends of the second bottom bar are released from the second guide grooves in a range in which both first and second screens are lowered to a range in which an inclined orientation of the slats can be adjusted, andfurther comprising a movement-restricting attachment added to a lower portion of the screen frame and configured to restrict free movement of the second bottom bar in a direction away from the screen frame when suspended from the winding shaft. 7. The window screen with a blind function according to claim 4, wherein the second bottom bar includes first and second ends, and the second bottom bar attached to the lower end of the second screen is suspended from the second screen without guiding the vertical movement of both ends thereof. 8. The window screen with a blind function according to claim 4, wherein a position of the second screen hung from the winding shaft when the second screen is brought into a reverse winding state with respect to the winding shaft after both screens first and second have been lowered by the unwinding rotation of the winding shaft and a deriving position of the second screen from the winding shaft takes a farthest position from the first screen is defined as the maximum distance position, andthe second bottom bar includes first and second ends, and second guide grooves configured to guide the vertical movement of the second bottom bar are provided at the positions apart from the first guide grooves for the first bottom bar formed on the side frames by a certain length so that both first and second ends of the second bottom bar are guided by the second guide grooves. 9. The window screen with a blind function according to claim 4, wherein in a state in which the first and second screens are wound around the winding shaft in an overlapped manner, a supporting position of the winding shaft in a winding box configured to accommodate the winding shaft is set so that a deriving position of engaging strips attached along the side end portions of the wound first screen from a surface of the winding screen is located above the guide rails for engaging strips on the side frames, andin a state in which the second screen is suspended from a peripheral side surface on the opposite side from a deriving side of the first screen in the winding shaft by unwinding both first and second screens from the winding shaft, the supporting position of the winding shaft into the winding box is set so that a suspending position at which the slats attached between both first and second screens becomes the longest with respect to an extending position of the first screen in a tensed manner. 10. The window screen with a blind function according to claim 1, wherein the first bottom bar to be attached to the lower end of the first screen is configured in such a manner that an auxiliary beam for adjusting the dimensions is provided so as to be freely movable in and out from a lower portion of a bottom bar body. 11. The window screen with a blind function according to claim 1, wherein at least the first screen is formed of an insect preventing net, andfurther comprising a gap sealing member configured to come into proximity to or contact with the first screen derived from the winding shaft and suppress passage of insects therebetween, the gap sealing member disposed at an opening edge of the winding box opposite the first screen within a range in which engaging strips at side ends of the first screen engage the guide rails so as to be freely slidable at an opening at a lower portion of the winding box in which the winding shaft is rotatably accommodated from which the first and second screens are derived. 12. The window screen with a blind function according to claim 1, wherein the slats are formed of a light-shielding sheet and are arrayed so as not to allow light leakage from a gap between adjacent slats, andfurther comprising a light-shielding frame provided on a supporting band for a number of engaging strips to be attached along the left and right side ends of the first screen or the side frames of the screen frames, the frame blocking light leakage along the left and right side end portions of the first screen, anda leakage preventing member configured to come in proximity to or in contact with the first screen derived from the winding shaft and suppress light leakage therebetween, the leakage preventing member disposed at an opening edge opposite the first screen in the opening from which the first and second screens are derived and formed in the lower portion of the winding box in which the winding shaft is rotatably accommodated. 13. The window screen with a blind function according to claim 1, further comprising covers intended for protection and dust proofing of the screen unit, the covers added to left and right side frames of the screen frame over ranges of the side frames that the screen unit can be extended in a tensed manner in a vertical direction so as to cover left and right end surfaces between the first and second screens in a state in which a distance between the first screen and the second screen is the largest and to cover a front surface side of left and right ends of the second screen. 14. The window screen with a blind function according to claim 1, further comprising an opening-and-closing operating member configured to achieve a winding and unwinding rotation of the first and second screens by rotating the winding shaft, the opening-and-closing operating member provided at a shaft end of the winding shaft, anda stopper configured to stop the rotation of the winding shaft before the first bottom bar moves away from the lower frame after having come into contact with the lower frame of the screen frame by an excessive rotation during the unwinding rotation of the winding shaft. 15. A window screen comprising: a first screen configured to be wound by a winding shaft;a second screen configured to be wound by the winding shaft together with the first screen in an overlapped manner; anda plurality of slats having a predetermined width and coupled between the first screen and the second screen, the slats being coupled at ends thereof to both the first and second screens at predetermined intervals, the slats being adjustable to different orientations and being flexible so as to be capable of being wound by the winding shaft together with the first and second screens, whereinan end of each of the first and second screens is coupled to the winding shaft so as to allow the first and second screens to be wound in an overlapped manner,the first screen includes engaging strips disposed in a slit of a guide rail on each of two side frames so as to be freely slidable therein,the first and second screens include first and second bottom bars attached to the lower end of the first and second screens, respectively, at least the first bottom bar being disposed in first guide grooves of the side frames to guide vertical movement of the first bottom bar, andthe first and second screens are configured so that, at least, one of the bottom bars is in contact with a lower frame with the slats in any desired inclined orientation when both screens are in an extended state. 16. The window screen according to claim 15, wherein the first and second screens and slats are configured such that unwinding rotation of the winding shaft causes downward movement of both screens and brings the first and second bottom bars to the lower frame of the screen frame simultaneously, or the first bottom bar does not reach the lower frame before the second bottom bar,further rotation of the winding shaft causes upward movement of the second screen, andthe slats have an inclined orientation moving upward and downward on a second screen side when either one of the first and second bottom bars is in contact with the lower frame. 17. The window screen according to claim 16, wherein both the first and second screens are configured such that a plurality of the slats suspend the second screen with respect to the first screen when both the first and second screens move downward by the unwinding rotation of the winding shaft. 18. The window screen according to claim 17, wherein each slat includes a first coupling portion for attachment to the first screen and a second coupling portion for attachment to the second screen, the first coupling portion of one slat overlapping a height of the second coupling portion of an adjacent slat. 19. The window screen according to claim 18, further comprising second guide grooves configured to guide vertical movement of the second bottom bar, the respective the first and second guide grooves of the first and second bottom bars disposed adjacent to one another but configured so that the first and second bottom bars do not come into contact with each other.
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이 특허에 인용된 특허 (11)
Colson Wendell B. ; Swiszcz Paul G., Apparatus for fabricating a light control window covering.
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