Classifications

• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
  • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
  • E06B9/40—Roller blinds
  • E06B9/42—Parts or details of roller blinds, e.g. suspension devices, blind boxes

Definitions

• the present invention relates to a roll screen apparatus in which S flexible sheet members are vertically movable to serve as a blind or screen for shielding light. More particularly, the present invention relates to a multi-roll screen apparatus including a plurality of flexible sheet members wound around respective rollers, thereby allowing the user to select a desired one of the rollers in accordance with a given situation, while the flexible sheet ID members being unwound in accordance with rotation of the selected roller causing a vertical movement of a weight member coupled to the flexible sheet member, so that the multi-roll screen apparatus can perform diverse functions.
• blind devices are installed to windows in order to shield sunlight or to control the amount of sunlight entering a room through those windows. Such blind devices also serve to prevent the interior of the room from being viewed from the exterior, so that they may be used as devices for
• the present invention is related to a roll screen.
• Fig. 1 is a view schematically illustrating the configuration of a conventional roll screen apparatus.
• the conventional roll screen apparatus includes a drive motor 10 for generating a torque using an electric power externally applied thereto, a drive shaft 1 1 for receiving the torque from the drive motor 10 so as to rotate on its own axis, a torque transmitting unit 12 for transmitting the rotating force from the drive shaft 1 1 , a roller 20 arranged
• a flexible sheet member 30 fixedly mounted to the roller 20 at one end thereof while being wound around the roller 20 to be vertically movable in accordance with rotation of the roller 20, thereby adjusting the amount of incident light a weight member 40 fixedly mounted to the other end of the flexible sheet member 30 such that it extends horizontally, and adapted to apply its weight to the flexible sheet member 30 so as to prevent the flexible sheet member 30 from becoming wrinkled and to allow the flexible sheet member 30 to 5 conduct smoother vertical movements in accordance with the rotation of the roller 20, and an outer case 50 for enclosing the drive motor 10 and the roller 20 therein, in order to provide a more beautiful appearance.
• the torque transmitting unit 12 which comprises a gear engaged with the other end of the drive shaft 1 1 .
• the torque from the torque transmitting unit 12 is transmitted to the roller 20 coupled around the torque transmitting unit 12, so that the roller 20 is rotated.
• ⁇ D 30 wound around the roller 20 is vertically moved, so that it serves as a roll screen.
• the weight member 40 is mounted to the lower end of the flexible sheet member 30 in order to apply its weight to the flexible sheet member 30, thereby preventing the flexible sheet member 30 from being degraded in appearance as it becomes wrinkled due to its material
• an object of the invention is to provide a multi-roll screen apparatus including a plurality of rollers, on which diverse flexible 5 sheet members are wound, thereby allowing the user to select a desired one of the rollers in accordance with a given situation, and allowing the flexible sheet member to be unwound in accordance with rotation of the selected roller, so as to allow the user to more conveniently use the roll screen apparatus, while providing a replaceable structure for those flexible sheet
• a multi-roll screen apparatus comprising: a plurality of rollers each supporting one end of a flexible sheet member while being rotatable on its own axis to wind or unwind the flexible sheet member; rotating plates adapted to support opposite ends of each of the rollers, respectively, each of the rotating plates rotating on its own axis to control a revolution of the
• ⁇ D rollers a plurality of weight members each mounted to the other end of an associated one of the flexible sheet members, each of the weight members having opposite ends respectively supported by the circumferential portions of the rotating plates, and serving to move downwardly at a desired position during rotation of the rotating plates, thereby allowing the associated flexible
• torque transmission means for transmitting a torque generated by an external force to the rotating plates, thereby rotating a selected one of the rollers on its own axis, revolving the rollers, and rotating each of the rotating plates on its own axis; sensing means for sensing the rotation of each of the rotating plates on its own axis,
• control means for controlling the torque transmission means, based on respective states of the rotating plates and/or the rollers, and/or the weight members sensed by the sensing means.
• a plurality of rollers, on which flexible sheet members are wound can be simultaneously applied to one roll screen apparatus.
• a roller carrying a particular flexible sheet member is to be used, it can be selected by rotating the rotating plate on its own axis. Thereafter, the selected roller is rotated to 5 unwind its flexible sheet member or to wind again the unwound flexible sheet member.
• the roll screen apparatus can be conveniently used.
• Fig. 1 is a view schematically illustrating the configuration of a conventional roll screen apparatus
• Fig. 2 is a perspective view illustrating the outer configuration of a 15 multi-roll screen apparatus according to an embodiment of the present invention
• Fig. 3 is an exploded perspective view illustrating the multi-roll screen apparatus according to the present invention in a state in which an outer case is separated;
• ⁇ D Fig. 4 is an enlarged exploded perspective view illustrating the multi- roll screen apparatus according to the present invention;
• Fig. 5 is an enlarged perspective view illustrating the inner configuration of the multi-roll screen apparatus according to the present invention in a state in which the outer case is removed, along with a fixed ⁇ 5 panel and a rotating ring;
• Fig. 6 is an exploded enlarged perspective view illustrating a configuration for separably mounting each roller in the multi-roll screen apparatus according to the present invention
• Figs. 7A and 7B are views illustrating operations for selecting a 3D desired flexible sheet member in the multi-roll screen apparatus according to the present invention, respectively;
• Figs. 8A and 8B are views illustrating the downward movement of the weight member in the multi-roll screen apparatus according to the present invention
• Figs. 9A to 9C are views illustrating a roller rotating unit included in a multi-roll screen apparatus according to another embodiment of the present invention
• Figs. 1 0A to 1 0C are views illustrating a unit for rotating a rotating 5 plate in a multi-roll screen apparatus according to another embodiment of the present invention
• Fig. 1 1 is a perspective view illustrating a multi-roll screen apparatus according to a third embodiment of the present invention
• Fig. 1 2 is a perspective view illustrating the multi-roll screen ID apparatus according to the third embodiment of the present invention under the condition in which a right case and a right cover are removed;
• Fig. 13 is a view concretely illustrating the inner configuration of an operating units according to the third embodiment of the present invention.
• Fig. 14 is a view illustrating the operation of a weight member in the 15 multi-roll screen apparatus according to the third embodiment of the present invention.
• Fig. 1 5 is a view illustrating respective operations of a roller operating unit and a rotating plate operating unit according to the third embodiment of the present invention
• ⁇ D Figs. 1 6A to 1 6C are views respectively illustrating the configurations and operations of a roller locking unit and a rotating plate locking unit in the multi-roll screen apparatus according to the third embodiment of the present invention
• Fig. 1 7 is a view illustrating the inner surface of the right rotating plate ⁇ 5 according to the third embodiment of the present invention.
• Figs. 1 8 and 1 9 are views illustrating the inner surface of the left rotating plate according to the third embodiment of the present invention.
• Fig. 20 is a view illustrating the configuration of a multi-roll screen apparatus according to a fourth embodiment of the present invention under 3D the condition in which the case is removed;
• Fig. 21 is a view illustrating operations of the multi-roll screen apparatus according to the fourth embodiment of the present invention.
• FIG. 2 is a perspective view illustrating the outer configuration of a multi-roll screen apparatus according to an embodiment of the present invention.
• the multi-roll screen apparatus includes 6 identical rollers, 6 identical roller gears, and 6 identical weight members, respective numbers of these elements may be appropriately adjusted.
• a flexible member is installed between each of the rollers and an associated one of the weight members. Under this assumption, the illustration of such
• the multi-roll screen apparatus includes, for its outer configuration, an outer case including right and left end panels 410 and 420 defining therebetween a desired space for receiving a plurality of inner constituting elements included in the multi-roll screen apparatus, and spacer
• the spacer panels 430 may have a size determined to allow the space to have a desired volume.
• the size of the spacer panels 430 may depend on the size of the multi-roll screen apparatus. In order to provide a more beautiful appearance for the
• gaps each defined between adjacent ones of the spacer panels 430 may be appropriately closed.
• the end panels 410 and 420 are arranged at right and left positions, they are not limited to such positions. Even when the end panels 410 and 420 are reversed to each other in position, the same effect may be maintained by reversely
• the multi-roll screen apparatus also includes rollers 330 installed in the space defined by the panels 410, 420 and 430, and adapted to vertically move flexible sheet members in accordance with rotation thereof on their own axes, respectively, and weight members 320 each adapted to move an
• the multi- roll screen apparatus further includes rotating plates 300 respectively installed at the end panels 410 and 420, and adapted to rotate on their common axis, respectively, thereby revolving the rollers 330 around the common axis.
• the multi-roll screen apparatus also includes an external force transmission controlling means including a manual lever 194 mounted to a desired portion of the outer surface of the right end panel 410, and adapted to allow the multi-roll screen apparatus to be manually manipulated, a lever 5 pulling string 195 connected at one end thereof to the manual lever 194, and adapted to operate the manual lever 194 when it is pulled, and a manual rotating member 271 mounted to a desired portion of the outer surface of the right end panel 410.
• the manual rotating member 271 serves, along with the manual lever 194, to allow the multi-roll screen apparatus to be manually
• the external force transmission controlling means also includes a rotating member manipulating string 272 having an endless structure formed by a plurality of beads each connected to one another.
• the rotating member manipulating string 272 is partially engaged with a sprocket formed around the manual rotating member 271 so that when it is
• Fig. 3 is an exploded perspective view illustrating the multi-roll screen apparatus according to the present invention in a state in which an outer
• the multi-roll screen apparatus also includes a torque transmission means including roller gears 350 each mounted to one end of an associated one of the rollers 330, and adapted to transmit a torque, transmitted thereto, to the associated roller 330.
• the rotating plates 300 serve to rotatably support both ends of each roller 330, respectively.
• the torque transmission means also includes rotating rings 310 each fixedly mounted to the outer surface of an associated one of the rotating plates 300 to extend along the circumference of the associated rotating plate 300.
• the torque transmission means further includes a fixed panel 500 fixedly mounted to the right end panel 410 while being spaced apart from the rotating plate 300 associated with the right end panel 410.
• the fixed panel 500 serves to install the external force transmission controlling means and/or torque transmission means of the multi-roll screen apparatus.
• a drive motor 600 which generates a torque as it receives electric power, is also included in the torque transmission means.
• an 5 L-shaped manual link 191 is provided which is hingably mounted to the right end panel 410.
• the manual link 191 is connected at one end thereof to the manual lever 194.
• the manual link 191 serves to transmit an external force applied to the manual lever 194.
• a hinge shaft 192 is mounted to the right end panel 410 in order to hingably mount the manual link 191 the fixed panel
• a spring 193 is arranged around the hinge shaft 192 in order to always urge the manual link 191 to rotate about the hinge shaft 192 in a clockwise direction.
• Each of the end panels 410 and 420 is provided with a weight member guide 421 formed at a desired position on the inner surface of the
• the right end panel 410 is provided with vertical slots 412 formed at desired portions of the right end panel 410, and adapted to allow the manual lever 194 and the manual rotating member 271 to move within desired distances,
• Fig. 4 is an enlarged exploded perspective view illustrating the multi-roll screen apparatus according to the present invention
• the external force transmission controlling means also comprises a manual gear 270 arranged inside the right end panel 410 (Fig. 3) on a shaft extending
• the external force transmission controlling further comprises a solenoid 100 activated when it receives electric power from an external power source, in order to control the
• a solenoid bar 1 10 adapted to move longitudinally in accordance with activation or deactivation of the solenoid 100
• a torque path switching bar 140 adapted to move longitudinally between first and second positions in accordance with the longitudinal movement of the solenoid bar 1 10, thereby switching the path, along which torque is to be transmitted, between two torque transmission paths respectively corresponding to the first and second positions of the torque path switching bar 140
• a first bar locking member 130 for locking the torque path switching bar 140 at the first position
• a second bar locking member 150 5 for locking the torque path switching bar 140 at the second position
• a torque path switching link 170 hingably mounted to the torque path switching bar 140 at a lower end thereof, and adapted to switch the torque path between the two torque transmission paths in accordance with movements of the torque path switching bar 140.
• the first and second locking member springs 132 and 152 serve to always urge the first and second bar locking members 130 and 150 to rotate about first and second locking member hinge shafts 131 and 151 in the counterclockwise direction, respectively.
• a link spring 172 is
• the torque path switching bar 140 is provided at both ends thereof with first and second engagement protrusions 142 and 143 adapted to be engaged with the first and second bar locking members 130 and 150, thereby locking the torque
• ⁇ D path switching bar 140 at its first and second positions, respectively.
• the torque transmission means further includes a driven gear 280 mounted to one end of a drive shaft connected at the other end thereof to the drive motor 600 (Fig. 3) so as to receive a torque from the drive motor 600.
• the driven gear 280 is also selectively engaged with the manual gear
• the driven gear 280 can transmit both the rotating force transmitted from the drive motor 600 and the manually-generated rotating force transmitted from the manual gear 270.
• 3D transmission means also includes a manual gear spring 273 adapted to always urge the manual gear 270 toward its upper position, a rotation number sensing member 290 mounted on the drive shaft of the drive motor 600 to rotate by the same number of rotations as that of the driven gear 280, and a rotation number checking protrusion 291 formed at the circumference of the rotation number sensing member 290 for checking the number of rotations of the drive shaft.
• a drive shaft rotation number sensor 710 is also provided. The drive shaft rotation number sensor 710 comes into contact with the rotation number checking protrusion 291 once during each rotation of the 5 rotation number sensing member 290, thereby sensing one rotation of the drive shaft of the drive motor 600. The sensed result of the drive shaft rotation number sensor 710 is used to control the operation of the multi-roll screen apparatus. Although only one rotation number checking protrusion 291 is used in the illustrated case, an increased number of rotation number
• ID checking protrusions 291 may be used. In this case, it is possible to more precisely control the drive motor 600 because the number of sensing times per rotation of the drive shaft of the drive motor 600 is increased.
• the external force transmission controlling means also includes a weight member sensing bar 180 hingably mounted to the outer surface of the
• the weight member 320 and a weight member hinge member 181 adapted to hingably mount the weight member sensing bar 180 to the fixed panel 500 while being provided with a spring for always urging the weight member sensing bar 180 to come into contact with the weight member sensor 720.
• ⁇ 5 apparatus according to the present invention will be described under the condition in which the fixed panel 500 is separated from the roll screen apparatus.
• Fig. 5 is an enlarged perspective view illustrating the inner configuration of the roll screen apparatus according to the present invention
• the torque transmission means also includes a drive gear 200 mounted to the drive shaft of the drive motor 600 (Fig. 3) inwardly from the driven gear 280, and adapted to transmit the torque from the drive motor 600, and a shift gear 240 mounted to the upper end of the torque path switching link 170.
• the torque transmission means further includes a drive motor fixing member 301 centrally arranged on the rotating plate 300, and adapted to fix 5 the drive motor 600, and three torque transmission gears, that is, a first torque transmission gear 210, a second torque transmission gear 220, and a third torque transmission gear 230, adapted to sequentially transmit the torque from the drive gear 200.
• the first and second torque transmission gear 210 and 220 are rotatably mounted to the outer surface of the drive
• a rotating plate gear 250 is mounted to the outer surface of the rotating plate 300 under the drive motor fixing member 301.
• the rotating plate gear 250 is engagable with the shift gear 240 to receive the torque from
• the external force transmission controlling means also includes rotating ring locking grooves 31 1 formed at the circumference of the rotating ring 310, and adapted to lock an associated one of the rollers at a
• a rotating ring locking protrusion 160 formed at one end, that is, the right end, of the second bar locking member 150, and adapted to be engaged with the rotating ring locking groove 311 associated with a selected one of the rollers 330 to be positioned at a desired position, thereby locking the rotating plate
• each inclined protrusion 312 serves to release the engagement between the
• a weight member holding bar 303 is hingably mounted to the rotating plate 300 in order to prevent the weight member 320 from being separated, due to its weight, from an associated one of weight member receiving grooves 302 formed at the rotating plate 300 during the rotation of the rotating plate 300.
• a weight member releasing bar 304 is mounted to the inner surface of the fixed panel 500.
• a holding bar receiving groove 305 is also provided to receive the weight member holding bar 303 hingably moving to release the associated
• a holding bar spring 308 is also provided to always urge the weight member holding bar 303 to rotate in the counterclockwise direction when no external force is applied to the weight member holding bar 303, thereby holding the weight member 320 in the associated weight member receiving groove 302.
• the multi-roll screen apparatus also includes sensing means comprising at least one sensor for accurately measuring a rotated position of the rotating plate 300 to control the operation
• the sensing means includes roller position sensing grooves 306 formed at the outer surface of the rotating plate 300 in association with respective rollers 330 while being uniformly spaced apart from one another in a circumferential direction, a roller position sensor 730 mounted to the inner
• the multi-roll screen apparatus also includes control means for controlling the drive motor 600 and/or the solenoid 100 based on sensing signals from the sensors 730 and 740.
• the control means may comprise a microprocessor provided with a memory, and configured to conduct a desired arithmetic operation.
• ID Fig. 6 is an exploded enlarged perspective view illustrating a configuration for separably mounting each roller in the multi-roll screen apparatus according to the present invention.
• roller fitting member 340 is illustrated.
• the roller fitting member 340 is received in a recess formed at the inner surface
• roller fitting member 340 may be installed at one or both of the left and right rotating plates 300. By this configuration, the roller 330 is freely replaceable.
• roller fitting protrusions 335 having a desired length are formed at each end of the roller 330.
• a plurality of bearing members 341 are interposed between the roller fitting member 340 and the recess receiving the roller fitting member 340 while being always urged to come into contact with the roller fitting
• roller fitting member 340 is resiliently movable toward the rotating plate 300 by the springs 342 in order to achieve an easy mounting of the roller 330.
• roller fitting member 340 is formed, at its surface facing the roller 330, with holes 343 for receiving the roller fitting protrusions 335.
• a plurality of guide grooves 344 are formed at the recess of the rotating plate 300 in order to partially receive the bearing members 341 along with the associated springs 342 and to guide movements of the bearing members 341 , respectively.
• a torque transmission shaft 345 which carries the roller gear 350 at one end thereof, extends through the rotating plate 300 at the center of the recess.
• the roller fitting member 340 is centrally formed with a shaft hole 346 for receiving the other end of the torque transmission shaft 345 so that it 5 receives a torque from the roller gear 350 via the torque transmission shaft 345.
• roller 330 can be easily separated from the roller fitting member 340.
• the fitting of the roller 330 can also be achieved in the same manner as that in the separation process.
• roller fitting member 340 15 transmitted to the roller 330 via the torque transmission shaft 345, roller fitting member 340, and roller fitting protrusions 335, thereby causing the roller 330 to be rotated.
• the bearing members 341 slide on the outer surface of the roller fitting member 340.
• the torque transmission shaft 345 is keyed in the shaft hole 346 so that it is permitted to move only in axial directions, in order to transmit the torque from the roller gear 350 to the roller fitting member 340 while allowing the roller fitting member 340 to be axially moved.
• other coupling structures may be used for the coupling between the torque transmission
• the multi-roll screen apparatus of the present invention is equipped with a plurality of rollers so as to allow the user to select a desired one of flexible sheet members of different types wound around respective rollers, in accordance with the user s wishes or the existing situation.
• the multi-roll screen apparatus of the present invention can be used not only in a motor-operated fashion, but also in a manually- operated fashion when supply of electric power is cut off. In association with such various features, diverse operations are conducted in the multi-roll 5 screen apparatus of the present invention. These operations will now be described in detail.
• the operations of the multi-roll screen apparatus include an operation for selecting a desired one of the flexible sheet members, an operation for downwardly moving (that is,
• Figs. 7A and 7B are views illustrating operations for selecting a desired flexible sheet member in the multi-roll screen apparatus according to the present invention, respectively.
• Fig. 7A illustrates the state in which the roller gear associated with the selected flexible sheet member can receive a
• Fig. 7B illustrates the state in which the rotating plate gear can receive a torque.
• Figs. 7A and 7B the procedure for selecting a desired one of the flexible sheet members wound around respective rollers 330 in a motor-operated fashion is illustrated. In this procedure, electric power is
• 3D torque path switching bar 140 is pushed by the solenoid bar 1 10, the torque path switching link 170 hinges in the counterclockwise direction, so that the shift gear 240 is engaged with the third torque transmission gear 230 and the rotating plate gear 250, thereby connecting those gears 230 and 250. Accordingly, the torque from the drive gear 200 is transmitted to the rotating plate 300.
• ⁇ D member is wound, can be selected.
• the arrow in Fig. 7B indicates the revolution direction of the rollers 330. Only when the rotating plate 300 rotates in the direction indicated by the arrow, it is possible to select the roller 330 on which a desired flexible sheet member is wound. Accordingly, the drive motor 600 should be rotated in the direction indicated by the arrow
• the selection of a desired roller 330 is determined by a combination of the number of times when the roller position sensor 730 is switched on/off as one of the roller position sensing grooves 306 formed at the outer surface of the rotating plate 300 passes the roller position sensor
• 3D 730 the time when the rotating plate position sensor 740 is switched on/off as the rotating plate position sensing grooves 307 passes the rotating plate position sensor 740, and the number of ON/OFF times of the rotating plate position sensor 740. For example, where it is desired to select the third roller 330 from the rotating plate position sensing groove 307, this selection is achieved by stopping the revolution of the rotating plate 300 at the point of time when the roller position sensor 730 is switched on/off three times after the rotating plate position sensor 740 is switched on/off.
• the solenoid 5 100 is continuously supplied with electric power, so that the solenoid bar 1 10 continuously pushes the torque path switching bar 140.
• the rotating plate 300 rotates on its own axis, the rotating ring locking protrusion 160 slides along the inclined protrusion 312, thereby causing the torque path switching bar 140 to be disengaged from the second bar locking member 150.
• the torque path switching link 170 tends to hinge in the clockwise direction toward its original position where it enables a selected roller 330 to be rotated in a motor-operated fashion, by virtue of the spring force of the link spring 172.
• the solenoid 100 is continuously supplied with electric
• ⁇ 5 140 is disengaged from the second bar locking member 150 by virtue of the spring force of the link spring 172. Simultaneously, the torque path switching link 170 rotates in the clockwise direction, thereby causing the torque path switching bar 140 to be engaged with the first bar locking member 130.
• the rotating ring locking protrusion 160 moves beyond the inclined protrusion 312, so that it is engaged with the rotating ring locking groove 31 1 arranged downstream from the inclined protrusion 312 without any interference.
• the rotating ring 310, and the rotating plate 300 integral with the rotating ring 310 no longer rotate.
• the weight member holding bars 303 are arranged on the circumference of the rotating plate 300.
• Each weight member holding bar 303 is always urged to come into contact, at one end thereof, with the weight member 320 received in the associated weight 5 member receiving groove 302, thereby preventing the weight member 320 from being separated, due to its weight, from the weight member receiving groove 302 during the rotation of the rotating plate 300.
• the weight member holding bar 303 comes into contact, at the other end thereof, with the weight member releasing bar 304 during the rotation of the rotating plate 300, so
• roller selecting procedure is completed.
• the procedure carried out in a motor-operated fashion has been described. Now, the operation carried out in a manually-operated fashion
• ⁇ 5 transmission gear 230 is transmitted to the rotating plate gear 250 via the shift gear 240.
• the rotating plate 300 can be rotated by the torque from the drive gear 200.
• the user downwardly pulls the rotating member manipulating string 272 (Fig. 3), thereby causing the manual gear 270
• the torque path switching link 170 hinges in the clockwise direction by the link spring 172, thereby enabling the torque from the third torque transmission gear 230 to be transmitted to the roller gear 350.
• ⁇ D rotation of the drive gear 200 is carried out in the same fashion as that of the method for manually rotating the rotating plate 300 on its own axis.
• torque is transmitted to the roller gear 350, so that the flexible sheet member wound around the roller 330 is downwardly moved.
• Figs. 8A and 8B are views illustrating the downward movement of the weight member in the multi-roll screen apparatus according to the present invention.
• Fig. 8A illustrates the state of the weight member not downwardly
• FIG. 8B illustrates the state of the downwardly moved weight member.
• the roller 330 coupled to the shaft of the roller gear 350 is rotated, so that the flexible sheet member wound around the roller 330 is downwardly moved.
• the weight member sensing bar 180 comes into contact with the facing end of the weight member 320 at one end thereof, so that it is maintained at its first hinged position. In this first
• the weight member sensing bar 180 causes the weight member sensor 720 to be in its ON state.
• the weight member sensing bar 180 hinges to its second hinged position where it causes the weight member sensor 720 to be in its OFF state.
• the end of the weight member sensing bar 180 adapted to come into contact with the facing end of the weight member 320 has an L-shaped 5 structure having a spherical end portion so that it hinges between its first and second hinged positions as the weight member 320 moves downwardly and upwardly, while coming into smooth contact with the facing end of the weight member 320 as the weight member 320 moves upwardly.
• a flexible sheet member which may have diverse structures, is wound around each roller.
• the flexible sheet member may include a member with diverse themes, for example, transparent films and fabrics of diverse colors and pictures. Diverse rollers respectively wound around flexible sheet members having diverse themes may be prepared to
• This embodiment is similar to the above described embodiment in that the weight members are arranged around the rotating plates, and the rollers are arranged between the rotating plates. In accordance with this embodiment, however, in addition to the drive motor for rotating the rotating plates, another drive motor is provided to rotate the rollers. These motors are installed at the rotating plates 300, respectively. In accordance with this arrangement, the entire configuration is simplified, thereby achieving an improvement in operational reliability. Now, this embodiment will be 5 described in conjunction with the annexed drawings. The elements having the same functions as those of the above described embodiment will be denoted by the same reference numerals.
• Figs. 9A to 9C are views illustrating a roller rotating unit included in a multi-roll screen apparatus according to another embodiment of the present
• the roller rotating unit includes a lever pulling string 195 adapted to be pulled by the user, a manual lever 194 connected to the lever pulling string 195, and adapted to conduct a desired switching operation when the lever pulling string 195 is pulled, a rotating member
• a first fixed panel 800 is also provided.
• ⁇ D Fig. 9B is a view illustrating the multi-roll screen apparatus shown in
• a drive gear 200 which serves to receive a torque from the drive motor, is mounted to the inner surface of the first fixed panel 800.
• the torque from the drive gear 200 is transmitted to a roller gear 350 via a
• first torque transmission gear 81 0 ⁇ 5 first torque transmission gear 81 0 and a second torque transmission gear 820.
• the torque transmitted to the roller gear 350 is used to rotate the roller 330 associated with the roller gear 350.
• a rotation number sensing member 830 is mounted on a shaft of the second torque transmission gear 820 outwardly from the second torque
• the rotation number sensing member 830 is provided at its circumference with a rotation number sensing protrusion.
• a rotating number sensor 850 is arranged adjacent to the rotation number sensing member 830. When the rotation number sensing protrusion comes into contact with the rotation number sensor 850, it turns on/off the rotation number sensor 850, so that the rotation number sensor 850 senses one rotation of the second torque transmission gear 820. Based on this sensing operation, the operation of the drive motor is controlled. 5
• a second fixed panel 801 is also provided in order to mount the above described torque transmission gears 810 and 820.
• Fig. 9C is a view illustrating the multi-roll screen apparatus shown in ⁇ Fig. 9A under the condition in which the second fixed panel 801 is removed.
• the roller rotating unit further includes a manual
• manual rotating gear 840 does not interfere with transmission of an external force generated from the drive motor, and a manual rotating gear support bar 860 adapted to maintain the manual rotating gear 840 at its lower position in order to provide convenience to the user in rotating the rotating member manipulating string (denoted by the reference numeral "272" in Fig. 9A).
• the roller rotating unit also includes a support bar spring 861 for always urging the manual rotating gear support bar 860 to its right position where the manual rotating gear support bar 860 is engaged with the manual rotating gear 840 positioned at its lower position, a switching link 870 adapted to hinge in the counterclockwise direction when the roller gear 350 is completely
• FIG. 9A and 9B another embodiment of the present invention will be described with reference to Figs. 9A and 9B.
• this embodiment has features in that both the manually-generated external force and the motor- generated external force are applicable.
• the rotating operation of the roller gear illustrated in Figs. 9A to 9C will be described first.
• the user desires to transmit a torque generated by the drive motor to the roller gear 350, in order to downwardly move the flexible sheet member, it is necessary to transmit the torque to the roller gear 350 via the drive gear 200, the first torque transmission gear 810, and the second torque 5 transmission gear 820, thereby unwinding the flexible sheet member. Where it is desired to wind the flexible sheet member, this can be achieved by reversely rotating the drive shaft of the drive motor.
• the shaft connecting the manual rotating gear 840 and manual rotating member 271 may be held by the manual rotating gear support bar 860. In this state, it is possible to prevent the manual rotating gear 840 from being upwardly moved by virtue of the spring force of the manual gear spring 841. Accordingly, the user can
• ⁇ D conveniently use the multi-roll screen apparatus.
• Fig. 10A is a view illustrating a unit for rotating the rotating plate in a multi-roll screen apparatus according to another embodiment of the present 5 invention.
• the rotating unit includes a configuration similar to the configuration of the roller rotating unit shown in Figs. 9A to 9C, that is, a manual rotating member 271 , a rotating member pulling string 272, a manual lever 194, and a lever pulling string 195.
• the rotating unit furthermore, a manual rotating member 271 , a rotating member pulling string 272, a manual lever 194, and a lever pulling string 195.
• ID includes a first fixed panel 900 for mounting the above described elements.
• Fig. 10B is a view illustrating the multi-roll screen apparatus shown in Fig. 10A under the condition in which the first fixed panel 900 is removed.
• the rotating unit further includes first and second torque transmission gears 910 and 920 adapted to transmit a torque
• a rotation number sensing member 930 is mounted on a shaft of the second torque transmission gear 920 outwardly from the second torque transmission gear 920.
• the rotation number sensing member 930 is provided at its circumference with a rotation number sensing protrusion.
• the rotating unit also includes a rotating number sensor 950
• the rotation number sensor 950 is mounted to the inner surface of the first fixed panel 900, whereas the remaining .elements are mounted to a second fixed panel 901 .
• Fig. 10C is a view illustrating the multi-roll screen apparatus shown in
• the rotating unit further includes a third torque transmission gear 980 mounted on a shaft of the second torque transmission gear 920 inwardly from the second torque transmission gear 920 in order to transmit a torque to the rotating plate gear 250 for rotation of the rotating
• u 940 denotes a manual rotating gear
• u 960 denotes a manual rotating gear
• a manual rotating gear support bar denotes a manual rotating gear support bar
• a switching link denotes a switching link
• the manual rotating gear 940, manual rotating gear support bar 960, and switching link 970 are identical to those illustrated in Figs. 9A to 90. Accordingly, no further description of these elements will be given.
• the rotating plate may be rotated in a manually-operated fashion or in a motor-operated 5 fashion.
• the torque from the drive motor transmitted to the drive gear 200 is transmitted from the drive gear 200 to the rotating plate 300 via the first torque transmission gear 910, the second torque transmission gear 920, the third torque transmission gear 980, and the
• the roller on which a desired flexible sheet member is wound, can be selected.
• the number of rotations of the drive motor is sensed by the rotation number sensor 950 operating in cooperation with the rotation number sensing
• Fig. 1 1 is a perspective view illustrating a multi-roll screen apparatus according to the third embodiment of the present invention.
• the multi-roll screen apparatus includes a fixing frame 1000 provided with a plurality of bent portions at the top thereof, and adapted to fix the multi-roll screen apparatus using fixing members such as bolts, left and right cases 1010 extending downwardly from the fixing frame 1000 at both ends of the fixing frame 1000, respectively, while serving to
• the roller rotating string 1 100 having an endless structure formed by a plurality of beads each connected to one another. The roller is rotatable by an engagement operation carried out within the multi-roll screen apparatus.
• the rotating plate rotating string 1200 moves upwardly and downwardly in a
• the roller rotating string 1 100, rotating plate rotating string 1200, and driving units associated with those strings 1100 and 1200 may be arranged at any one of the left and right sides of the multi-roll screen apparatus. This arrangement may be determined according to the users desires.
• ID Fig. 12 is a perspective view illustrating the multi-roll screen apparatus according to the third embodiment of the present invention under the condition in which the right case and right cover are removed.
• the multi-roll screen apparatus includes a rotating member 1 1 10 encompassed by the roller rotating string 1 100 in such 15 a fashion that it is engaged with the top of the roller rotating string 1 100, a rack 1210 coupled at the lower end thereof to the upper end of the rotating plate rotating string 1200, a rack returning spring 1220 coupled between the upper end of the rack 1210 and the fixed plate 1400, and adapted to return the rack 1210 to its original position, and a pinion 1240 engaged with the ⁇ D rack 1210.
• the rack 1210 extends through a guide panel 1230 having a plurality of bent guide surfaces so that its ' movement is guided by the guide panel 1230.
• the rotating member 1 1 10 is engaged with the beads of the roller rotating string 1 100 at the top of the roller rotating string 1 100 so that it is ⁇ 5 rotated in accordance with rotation of the roller rotating string 1 100.
• a fixed plate 1400 is arranged inwardly from the guide panel 1230 in order to mount a plurality of elements thereon.
• the multi-roll screen apparatus also includes a torque transmission 3D means, and an external force transmission controlling means which are mounted to the outer surface of the fixed plate 1400.
• the torque transmission means comprises a reduction unit 1300 adapted to transmit the torque from the drive motor in a state in which the number of rotations is reduced
• the external force transmission controlling means comprises a roller operating unit 1540, and a rotating plate operating unit 1550 (Fig. 14) for rotating the selected roller and the rotating plate using the torque transmitted from the reduction unit 1300.
• the multi-roll screen apparatus further includes roller controlling electromagnets 1410 and rotating 5 plate controlling electromagnets 1420 for controlling the operation of the roller operating unit 1540.
• the multi-roll screen apparatus includes first through fourth roller controlling electromagnets 141 1 , 1412, 1413, and 1414 for the roller controlling electromagnets 1410, and first through fourth rotating plate controlling electromagnets 1556, 1557, 1558, and 1559 for the
• the rotating plate is denoted by the reference numeral "1500".
• This rotating plate 1500 is arranged inwardly from the fixed plate 1400, and adapted to receive one end of each roller. The rotating plate 1500 is rotated to select a desired one of the rollers.
• the reduction unit 1300 includes a first reduction gear (not shown) for receiving the torque from the drive gear 200 (Fig. 7), a second reduction gear 1310 for receiving the torque from the first reduction gear, a third reduction gear 1320 engaged with the second reduction gear 1310, and adapted to
• ⁇ D receive the torque from the second reduction gear 1310, and a fourth reduction gear 1330 engaged with the third reduction gear 1320, and adapted to receive the torque for rotating a selected roller, and a fifth reduction gear 1340 engaged with the third reduction gear 1320, and adapted to receive the torque for rotating the rotating plate.
• the fourth reduction gear 1330 is
• the first reduction gear (not shown) and third reduction gear 1320 are mounted on the same rotating shaft and rotate respectively.
• the reduction gears engaged with each other have different diameters, respectively.
• the first reduction gear (not shown) has a larger diameter portion engaged with the drive gear 200, and a smaller diameter portion engaged with a larger diameter portion of the second reduction gear 1 310.
• the smaller diameter portion of the second reduction gear 1310 is engaged with a larger diameter portion of the third reduction gear 1320.
• the smaller diameter portion of the third reduction gear 1320 is engaged with the fourth reduction gear 1330, and a larger diameter portion of the fifth reduction gear 1340.
• the torque finally transmitted to the roller and the rotating plate has a considerable magnitude required to rotate the roller gear and the rotating plate even when the torque generated from the drive motor has a small magnitude.
• Fig. 13 is a view concretely illustrating the inner configuration of the
• the fixed plate 1400 is removed from Fig. 13. As shown in Fig. 13, the rotating plate 1500 is arranged inwardly from the fixed plate 1400.
• the multi-roll screen apparatus includes weight members 320 received in grooves formed at the circumference of the rotating plate 1500, respectively, and
• the multi-roll screen apparatus also includes roller gears 1560 rotatably mounted to the
• ⁇ D rotating plate 1500 to control respective operations of the associated rollers, a roller locking unit 1580 for transmitting power, generated in accordance with a manual operation carried out by the user, between the rotating member 1 1 10 and the selected roller gear 1560 in one direction, and a rotating plate locking unit 1590 for transmitting power between the rack 1210 and the
• a sensing means for controlling the rotating operation of the rotating plate 1500 is mounted to the rotating plate 1500.
• the sensing means comprises roller sensing members 1510, and a rotating plate sensing member 1515 for sensing the rotating operation of the rotating plate 1500.
• 3D roller sensing members 1510 are provided for respective rollers, whereas only one rotating plate sensing member 1515 is arranged on the rotating plate 1500.
• the rotating plate sensing member 1515 serves to accurately sense one rotation of the rotating plate 1500, thereby sensing the current state of the rotating plate 1500.
• a roller sensor 1520 and a rotating plate sensor 1530 are mounted to the inner surface of the fixed plate 1400.
• each of the roller sensing members 1510 and rotating plate sensing member 1515 may be a permanent magnet.
• Each of the roller sensor 1520 and rotating plate sensor 1530 may be a magnetic sensor.
• a rotating plate gear 1460 is centrally arranged on the rotating plate 1500 while being integral with the rotating plate 1500.
• ID gear 1460 serves to transmit a final torque to the rotating plate 1500.
• the multi-roll screen apparatus further includes a rotating plate bearing 1470 adapted to achieve a smooth rotating operation of the rotating plate 1500, and roller bearings 1570 each adapted to achieve a smooth rotating operation of an associated one of the roller gears 1560.
• Fig. 14 is a view illustrating the operation of the weight member in the multi-roll screen apparatus according to the third embodiment of the present invention.
• Fig. 14 illustrates the weight members 320, and a means for sensing a complete upward movement of each weight member 320.
• the means
• ⁇ D comprises a weight member sensing bar 1570 hingably mounted to the rotating plate 1500, a weight member sensing portion 1571 arranged at a desired portion of the weight member sensing bar 1570, a weight member sensor 1572 mounted to the inner surface of the fixed plate 1400, and adapted to sense the weight member sensing portion 1571 when the weight
• ⁇ 5 member 320 is completely upwardly moved, thereby sensing the complete upward movement of the weight member 320, and a weight member stopping bar 1573 for preventing the weight member sensing bar 1570 from hinging excessively in the downward direction when the weight member 320 is completely released from the rotating plate 1500.
• 3D stopping bar 1573 is mounted to the fixed plate 1400.
• a weight member returning spring 1574 is also provided to always urge the weight member sensing bar 1570 to hinge downwardly.
• the weight member sensing member 1571 may be a permanent magnet, whereas the weight member sensor 1572 may be a magnetic sensor. The operation of each weight member will be described in conjunction with the above described configuration.
• the associated weight member 320 When a particular one of the rollers is selected to rotate, the associated weight member 320 is vertically moved. When the weight 5 member 320 is completely upwardly moved, the weight member sensing bar 1570 is upwardly pushed by the weight member 320, so that the weight member sensing member 1571 is aligned with the weight member sensor 1572 which, in turn, generates a sensing signal.
• the sensing signal representing the fact that the weight member 320 is completely upwardly ID moved is sent to a control means.
• the weight member sensing bar 1570 When the weight member 320 is downwardly moved, the weight member sensing bar 1570 is downwardly hinged by virtue of the weight member returning spring 1574.
• the rotation limit of weight member sensing bar 1570 may be set by being engaged with the weight member stopping bar
• Fig. 15 is a view illustrating respective operations of the roller operating unit and rotating plate operating unit according to the third embodiment of the present invention.
• the roller operating unit 1540 includes three gears ⁇ D arranged between outer and inner fixing plates. That is, the roller operating unit 1540 includes a first connecting gear 1543 engaged with the smaller diameter portion of the fourth reduction gear 1330, and a pair of roller operating gears, that is, first and second roller operating gear 1541 and 1542, engaged with the first connecting gear 1543.
• the shaft of the first ⁇ 5 connecting gear 1543 is mounted to the fixed plate 1400 so as to operate as a shaft of the roller operating unit 1540.
• first and second roller magnets 1546 and 1547 are arranged on the circumference of the roller operating unit 1540. 3D Mutual operations of the first and second roller magnets 1546 and
• roller operating unit 1540 rotates in the clockwise direction
• the second roller operating gear 1542 is engaged with the roller locking unit 1580.
• the second roller operating gear 1542 is rotated in the counterclockwise direction, thereby transmitting the torque transmitted thereto.
• this rotation is restricted by a second stopper 1548.
• the first roller operating gear 1541 is engaged with the roller locking unit 1580.
• the first roller operating gear 1541 is rotated in the clockwise direction, thereby transmitting the torque transmitted thereto.
• this rotation is restricted by a first stopper 1549.
• Table 1 illustrates respective polarities of the roller controlling electromagnets 1410, and first and second roller magnets 1546 and 1547 for controlling rotation of the roller operating unit 1540.
• roller operating unit 1540 is to be maintained at its neutral position or to rotate in the counterclockwise direction, an appropriate operation is carried out in order to provide a complementary magnetic relation between the roller magnets 1546 and 1547, and appropriate ones of the roller controlling electromagnets 1410. Now, the operation of the rotating plate operating unit 1550 will be described.
• the rotating plate operating unit 1 550 includes two gears arranged between the outer and inner fixing plates. That is, the rotating plate 5 operating unit 1550 includes a second connecting gear 1552 engaged with the smaller diameter portion of the fifth reduction gear 1340, and a rotating plate operating gear 1 551 engaged with the second connecting gear 1 552. At one side of the rotating plate operating unit 1 550, first and second rotating plate magnets 1554 and 1555 are arranged on the circumference of the rotating plate operating unit 1 550.
• the first, second, third, and fourth rotating plate controlling electromagnets 1 556, 1557, 1 558, and 1559 are arranged to face the first and second rotating plate magnets 1 554 and 1 555.
• the shaft of the second connecting gear 1552 is mounted to the fixed plate 1400 so as to operate as a shaft of the rotating plate operating unit
• the rotating plate operating unit 1550 has an operating mode in which the torque from the drive gear 200 is transmitted to the rotating plate 1500, and an operating mode in which no torque from the drive gear 200 is transmitted.
• 3D plate magnets, and rotating plate controlling electromagnets are 3D plate magnets, and rotating plate controlling electromagnets.
• Figs. 16A, 16B, and 16C are views illustrating the configurations and operations of the roller locking unit and rotating plate locking unit in the multi-roll screen apparatus according to the third embodiment of the present invention.
• the rotating plate locking unit 1590 includes a rotating plate drive gear 1594 engaged with the rotating plate gear 1460 (Fig. 13), and a rotating plate rotating gear 1591 engaged with the rotating plate operating gear 1551 (Fig. 15) and the pinion 1240 (Fig. 12).
• the rotating plate drive gear 1594 is arranged inwardly from the rotating plate rotating
• the rotating plate locking unit 1590 also includes a rotating plate connecting member 1592 extending inwardly from the inner surface of the rotating plate rotating gear 1591 while being partially opened along the circumference thereof, a rotating plate driving member 1593 extending outwardly from the outer surface of the rotating plate driving gear 1594 while being engaged with the rotating plate connecting member 1592 and a 5 rotating plate driving gear shaft engaged with the right case 101 1.
• the roller locking unit 1580 includes a roller rotating gear 1581 arranged inwardly from the rotating member 1 110, a roller connecting member 1582 extending inwardly from the inner surface of the roller rotating gear 1581 while being partially opened along the circumference
• roller driving member 1584 engaged with the roller connecting member 1582
• roller driving gear 1583 and a roller driving gear shaft engaged with the right case.
• the roller driving gear 1583 is engaged with the roller gear 1560 (Fig. 13)
• the roller rotating gear 1581 is engaged with the first and second roller operating gears 1541 and 1542 (Fig.
• Springs 1595 and 1585 are arranged between the rotating plate driving gear shaft and the rotating plate driving member 1593 and between the roller driving gear shaft and the roller driving member 1584, respectively, as shown in Figs. 16A and 16B.
• ⁇ D come into contact with the opposite ends of the rotating plate driving member 1593 and roller driving member 1584, respectively, while maintaining a minimum spacing therebetween.
• Fig. 16C is a cross-sectional view taken along the line A - A 1 of Fig. 16B. The operations of the rotating plate locking unit and roller locking unit
• ID frictional forces are generated between the spring 1595 and the rotating plate driving gear shaft and between the spring 1585 and the roller driving gear shaft, respectively.
• the associated frictional forces are correspondingly increased.
• the torque generated from the drive motor is to be automatically operated.
• 3D rotating plate 1500 is rotated.
• the rotating plate 1500 is rotated, it is possible to select a desired roller.
• the reduction unit 1300 serves to change a high-speed, weak rotating force generated from the drive motor into a high torque.
• the roller operating unit 1540 and rotating plate operating unit 1550 are controlled in position by the polarity control of the roller controlling electromagnets and rotating plate controlling electromagnets serving as an external transmission controlling means, in order to selectively achieve the transmission of the torque.
• the multi-roll screen apparatus can be 5 smoothly operated.
• roller locking unit 1580 and the rotating plate locking unit 1590 serve to transmit only the torque generated from the drive motor to the roller gear 1560 and the rotating plate gear 1460, respectively, while preventing an instability generated at the roller gear 1560 or rotating plate gear 1460 from
• the rotating plate rotating string 1 200 is downwardly is pulled.
• the rack 1 21 0 is downwardly moved, thereby causing the pinion 1240 to be engaged with the rotating plate rotating gear 1 591 .
• the rotating plate locking unit 1 590 is rotated, so that a desired one of the rollers can be selected.
• the pinion 1 240 is provided at both surfaces thereof with protrusions respectively received in slots formed at both side portions of the guide panel 1230, so as to guide upward and downward movements of the pinion 1240. Accordingly, it is possible to achieve stable movements of the pinion 1 240.
• the rotating angle of the rotating plate 1 500 corresponding to one
• the rotating angle of the rotating plate 1500 may correspond to the angle defined between adjacent rollers.
• the user can more conveniently use the multi-roll screen apparatus.
• the sensing means used to control the operation of the multi-roll screen apparatus includes a roller sensing member 1510 (Fig. 13), a rotating plate sensing member 1515 (Fig. 13), roller sensors 1520 5 (Fig. 13), and a rotating plate sensor 1530 (Fig. 13).
• the number of the roller sensing members 1510 corresponds to the number of the rollers 330 so that each roller sensor 1520 can sense the position of the rollers 330.
• the rotating plate sensor 1530 senses the reference position of the rotating plate 1500.
• a roller rotation number sensor 1430 (Fig. 14) is mounted to the fixed plate 1400, as a means for sensing the unwound length of the flexible sheet member. At least one roller rotation number sensing member (not shown) is arranged inwardly from the rotating member (denoted by the reference numeral Ll 1 1 10 11 in Fig. 13), as a roller rotation number sensing
• the roller rotation number sensing operation will be described hereinafter.
• the number of rotations of the roller 330 can be determined using the roller rotation number sensor 1430 and the rotating roller rotation number sensing member.
• An increased number of roller sensing members may be provided at the inner surface of the rotating member. In this case, it
• ⁇ D is possible to achieve a more precise control.
• the roller rotation number sensing member may be a permanent magnet, whereas the roller rotation number sensor 1430 may be a magnetic sensor.
• ⁇ 5 sensing bar 1570 and the weight member sensor 1572 are provided to sense the completely wound state of the flexible sheet member. Both the weight member sensing bar 1570 and the weight member sensor 1572 may be provided at each end of the roller. In this case, it is possible to more reliably sense the completely wound state of the flexible sheet member.
• Fig. 17 is a view illustrating the inner surface of the right rotating plate.
• the multi-roll screen apparatus includes a connecting rod 1600 for connecting the left and right cases, and right roller 5 fitting members 1610 for mounting respective rollers 330.
• a roller bearing 1570 is also fitted around each right roller fitting member 1610, in order to effectively reduce a friction effect generated during the rotation of the roller gear 1560.
• the drive motor is installed in the connecting rod 1600, in order to ID operate the multi-roll screen apparatus according to this embodiment.
• the connecting rod 1600 is threadedly coupled to the rotating plate 1500 at two or more positions, in order to achieve stable operations.
• Figs. 18 and 19 are views illustrating the left rotating plate according 15 to this embodiment.
• the left rotating plate is formed with holes corresponding to the rollers in number.
• a roller spring 1710 is firmly received in each hole.
• a roller fitting member 1720 is fitted in each hole while coming into contact with the roller spring 1710 received in the hole, in ⁇ D order to allow the left end of the roller 330 to be fitted therearound.
• the roller 330 can be easily mounted and separated.
• the left end of the connecting rod 1600 is fixedly coupled to left roller fitting members 1620 supported by left rotating plate bearings 1700.
• the torque generated from the right rotating plate can be transmitted to the left rotating plate.
• the multi-roll screen apparatus of the fourth embodiment has a 3D configuration largely similar to that of the third embodiment.
• the multi-roll screen apparatus of the fourth embodiment has a configuration different from that of the third embodiment in that it includes drive motors individually provided for rotation of the roller 330, and rotation of the rotating plate.
• Fig. 20 is a view illustrating the configuration of the fourth embodiment under the condition in which the cover is removed.
• the multi-roll screen apparatus includes a rotating plate driving motor 1800 for rotating the rotating plate 1500, and a 5 worm 1810 and a worm gear 1820 for reducing the rotating speed of the rotating plate driving motor 1800.
• the worm gear 1820 is engaged with the rotating plate rotating gear (denoted by the reference numeral “1591 " in Fig. 16A), so as to transmit a torque.
• the operation associated with the rotating plate rotating gear 1591
• the torque transmission configuration for transmitting a torque to the roller 330 is largely similar to that of the third embodiment. However, it is unnecessary to use individual intermittent torque transmission configurations for roller controlling electromagnets and roller magnets. This is because it is unnecessary to perform intermittent torque transmission in that the same
• ⁇ D drive motor as that of the third embodiment is used only for rotation of the roller 330 in the fourth embodiment, and the intermittent torque transmission effect can be achieved by appropriately turning on and off the drive motor. Detailed operations of the multi-roll screen apparatus according to the fourth embodiment will now be described.
• FIG. 21 is a view illustrating operations of the multi-roll screen apparatus according to the fourth embodiment of the present invention.
• the multi-roll screen apparatus includes a rotating plate connecting gear 1846 engaged with a smaller diameter gear arranged inwardly from the worm gear 1820, and a rotating plate operating
• 3D gear 1851 engaged with the rotating plate rotating gear 1591 (Fig. 16A).
• the rotating plate connecting gear 1846 and the rotating plate operating gear 1851 form a module interposed between a pair of spaced plates, that is, a rotating plate operating unit 1850.
• the shaft of the rotating plate connecting gear 1846 serves as a central shaft for rotation of the rotating plate operating unit 1850.
• the shaft of the rotating plate connecting gear 1 846 is inserted into the fixed plate 1400.
• the operation of the rotating plate operating unit 1 850 will now be described.
• the torque generated from the rotating plate driving motor 1800 5 is transmitted to the rotating plate connecting gear 1 846 via the worm gear 1 820.
• the rotating plate connecting gear 1846 rotates on its own shaft, thereby causing the rotating plate operating unit 1850 to rotate.
• the rotating plate operating unit 1850 and the rotating plate connecting gear 1 846 are designed to rotate only in the counterclockwise direction. Under this
• the rotating plate 1500 is also rotated only in one direction. If a rotation in a reverse direction is desired, this can be achieved by arranging the rotating plate connecting gear 1 846 in an opposite position.
• a third stopper 1852 is provided to limit the rotation range of the rotating plate operating unit 1850.
• the third stopper 1852 may be arranged is at any position insofar as the rotating plate operating gear 1851 and the rotating plate rotating gear 1591 (Fig. 16A) are engagable with each other.
• the multi-roll screen apparatus includes a roller connecting gear 1845 engaged with a smaller diameter gear arranged
• roller operating gear 1 840 ⁇ D inwardly from the fourth reduction gear 1 330 (Fig. 1 5), a first roller operating gear 1 841 , and a second roller operating gear 1842.
• the roller connecting gear 1845 and the first and second roller operating gears 1841 and 1 842 are interposed between a pair of spaced plates, thereby forming a roller operating unit 1 840.
• the roller operating unit 1840 is rotatable in both directions, that is, clockwise and counterclockwise directions. Where the roller connecting gear 1845 rotates in the counterclockwise direction, the roller operating unit 1840 is also rotated in the counterclockwise direction, thereby causing the first roller
• 3D operating gear 1841 to be engaged with the roller rotating gear 1 581 (Fig. 1 6B) .
• the roller connecting gear 1845 rotates in the clockwise direction
• the roller operating unit 1 840 is also rotated in the clockwise direction, thereby causing the second roller operating gear 1842 to be engaged with the roller rotating gear 1 581 (Fig. 1 6B) .
• First and second stoppers 1843 and 1 844 are provided at the fixed plate 1400 in order to limit the rotating range of the roller operating unit 1 840.
• the multi-roll screen apparatus including at least two rollers, on which flexible sheet members are wound, so as to select a desired one of the rollers in accordance with a given situation. Accordingly, there is an advantage in that the multi-roll screen apparatus can be used for diverse purposes meeting the user s desires.
• Each roller, on which a flexible sheet member desired by the user is wound, can be appropriately and selectively used in a motor-operated fashion or in a manually-operated fashion. Accordingly, the multi-roll screen apparatus can positively meet the user s desires. In particular, there is an advantage in that the multi-roll screen apparatus can be operated even

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• Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
• Overhead Projectors And Projection Screens (AREA)

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• 2001
  • 2001-03-07 KR KR10-2001-0011723A patent/KR100417618B1/ko not_active IP Right Cessation
• 2002
  • 2002-03-06 WO PCT/KR2002/000385 patent/WO2002070855A1/en not_active Application Discontinuation

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