JP5484034B2 - Screen device - Google Patents

Description

  The present invention relates to a portable screen device used when a video is projected by a video projector, a projector, a slide projector or the like to watch or broadcast a movie.

  Various types of portable screen devices have been proposed and put into practical use. Patent Document 1 discloses a self-supporting portable manual lifting screen device that can raise and lower the screen for a long period of time without causing trouble such as deformation and damage, and can simplify the configuration for that purpose. Is described.

  In this device, an upper end support member to which one end of the screen is connected and a base member to which the other end of the screen is connected are pivotally connected by a left and right link mechanism, and the lower arm is moved and urged upward. The urging means is provided. A slidable slide member is externally fitted to at least one of the left and right upper side arms and the left and right lower side arms, and the left and right slide members are placed on the vertical lines located approximately in the center of the screen in the horizontal direction of the screen It has a structure that is connected in a relatively rotatable manner.

JP 2004-046078 A

  The basic function of the projection screen is to match the imaging of the projector, and the size of the general projection screen is relatively large. Recently, with the advent and popularization of portable projectors (for example, mobile phones with a projection function), the projector has a smaller projection area, smaller volume and light weight depending on features such as convenience and low projection power. A small portable screen device that can be easily operated is desired.

  The present invention meets the above-described needs, and an object thereof is to provide a self-supporting manual lift type screen device that has a small volume, light weight, portability, and can be easily operated.

Representative structure of the screen device according to the present invention for achieving the above object,
A casing that is long in the left-right direction when the screen device is viewed from the front side, and whose upper surface side is open as an opening along the length;
A reel that is disposed inside the casing, is long in the left-right direction, and is urged to rotate in one direction;
A flexible screen having a lower end locked to the reel and wound around the reel;
An upper cover corresponding to the opening, which is long in the left-right direction, and which locks the upper end of the screen;
On the rear surface side of the screen, a telescopic boom that is disposed between the casing and the upper cover and is folded and accommodated inside the casing,
A meshing portion provided at a central portion in the left-right direction of the upper cover;
A meshed portion provided at a central portion of the casing in the left-right direction, and when the screen and the telescopic boom are stored in the casing, a meshed portion that meshes with the meshed portion;
A support leg provided on the lower surface of the central portion in the left-right direction of the casing, which can be rotated rearward with respect to the casing so that the screen-stretched device placed on the installation surface does not tilt backward. A support leg to support,
The meshed portion operates in conjunction with the rotation of the support leg, and the support leg is rotated in a posture parallel to the left-right direction in a state where the screen and the telescopic boom are housed in the casing. Sometimes the meshed portion operates in a direction to mesh with the meshed portion, and when the support leg is rotated backward with respect to the casing, the meshed portion operates in a direction in which meshing with the meshed portion is released. characterized in that it.

  The screen device of the present invention has a simple structure, is easy to use, has a small volume, and is convenient to carry.

Front view of the screen device in a state where the screen is held in a stretched state that can be used by the self-supporting function of the telescopic boom. FIG. 1 is a rear (rear) view of the screen device in the state of FIG. Left side view of the screen device in the state of FIG. Transverse right side view of screen device in screen storage state (A) is the perspective view which looked at the screen apparatus in the state where the upper cover is closed with respect to the casing and the support leg is rotated to the storage position, and (b) is the upper cover with respect to the casing. The perspective view which looked at the screen device of the state where it was closed and the support leg was rotated to the use position from the back side, Rear view of the screen device in which the screen is in the middle of lifting or lowering It is the perspective view of the screen apparatus which decomposed | disassembled the locking mechanism, (a) is the figure which looked at the rear surface side of the apparatus from the right side, (b) is the figure which looked at the rear surface side of the apparatus from the left side. Exploded perspective view of the main part of the lock mechanism (A) is explanatory drawing at the time of lock state of a locking mechanism, (b) and (c) are explanatory drawings at the time of a lock release state Cutaway rear view of the right hinge joint when the telescopic boom is raised Notched rear view of right hinge joint when telescopic boom is folded Cutaway rear view of screen device when telescopic boom is folded Notched rear view of screen device when telescopic boom is standing up Explanatory drawing of telescopic boom startup biasing device Structural illustration of hinge joint Rear (back) view of the screen device of Example 2

[Example 1]
Hereinafter, a portable screen device (self-supporting portable manual lifting screen device) 1 according to an embodiment shown in the drawings will be described. Here, in the following description, the front or front of the device 1 is a surface of the device 1 viewed from the image projection surface side (projector side) of the screen 2. The rear surface (rear surface) is the surface on the opposite side. The front or rear is the front or rear when the apparatus 1 is viewed from the front side. Left or right is left or right when the device 1 is viewed from the front side. Up or down is up or down with respect to the direction of gravity.

(Overall schematic configuration of the apparatus 1)
The apparatus 1 has a casing (outer shell) 3 that is long in the left-right direction. The casing 3 is an aluminum drawing mold material in the present embodiment, and has three surfaces, a front surface, a bottom surface, and a rear surface, in the cross section (FIG. 4), and the upper surface side along the length of the screen 2 and the folding telescopic boom 17. Is opened as an entrance / exit opening 304. A left cover 4 and a right cover 5 as end caps are fixed to the left and right ends of the casing 3 by appropriate means such as screwing, respectively. In the casing 3, a cylindrical reel 31 that is supported by bearings between the inner surfaces of the left cover 4 and the right cover 5 and that is long in the left-right direction is disposed. A flexible screen 2 is wound around the reel 31. The lower side (lower end) of the screen 2 is locked to the reel 31. The reel 31 is always urged to rotate in one direction by a biasing device (not shown: stress device) such as a spring.

  In this embodiment, the upper side (upper end) of the screen 2 is connected and fixed to the upper cover 6 which is a separate member from the casing 3 by a fixing plate 30. The upper cover 6 is long in the left-right direction, slightly longer than the width dimension (the dimension in the left-right direction) of the screen 2, and has a length dimension substantially the same as the length of the opening 304. The fixed plate 30 has substantially the same length as the width of the screen 2 and is fixedly attached to the inside of the upper cover 6. The upper side of the screen 2 and the upper cover 6 can be connected and fixed by other methods.

  The upper cover 6 supports the upper side of the screen 2 and also functions as a lid member that closes the opening 304 of the casing 3. A handle portion (pick portion) 7 is provided on the upper surface of the central portion of the upper cover 6 in the longitudinal direction (left-right direction). On the rear surface side of the screen 2, a telescopic boom 17 is provided between the casing 3 and the upper cover 6. The telescopic boom 17 has a self-standing function that can be raised and folded to hold the screen 2 in a stretched state. The telescopic boom 17 will be described in detail later.

  A support leg 16 as a device seat is provided on the lower surface of the substantially central portion of the casing 3 in the longitudinal direction. The base of the leg 16 is hinged to the lower surface of the casing 3 so as to be rotatable about the vertical axis. Then, the storage position A (FIG. 5 (a)) positioned in the projection surface on the lower surface of the casing 3 by rotating leftward and the casing rotated by rotating about 90 ° rearward from the storage position A. It is possible to change the state to the use position B (FIG. 5B, FIG. 3) that protrudes rearward from the lower surface of 3.

  In the present embodiment, in the state where the screen 2 and the telescopic boom 17 are stored in the casing 3, the upper cover for the casing 3 is interlocked with the turning operation of the leg 16 from the storage position A to the use position B. The lock mechanism 80 of No. 6 performs the unlocking operation. Further, in conjunction with the turning operation of the leg 16 from the use position B to the storage position A, the lock mechanism 80 of the upper cover 6 with respect to the casing 3 performs a locking operation. The lock mechanism 80 and its operation will also be described in detail later.

  In the apparatus 1 in the screen storage state of FIG. 4, the screen 2 is sufficiently wound by the rotational urging force of the reel 31 and stored in the casing 3. The telescopic boom 17 is also folded on the rear side of the screen 2 wound around the reel 31 and stored in the casing 3. The upper cover 6 is positioned so as to close the opening 304 corresponding to the opening 304 on the upper surface of the casing 3, and functions as a lid member for the opening 304. The leg 16 is rotated to the storage position A. At this position A of the leg 16, the lock mechanism 80 in the casing 3 is held in the lock operation state, and the upper cover 6 is locked (latched) with respect to the casing 3. Hold this locked device 1 (FIGS. 4 and 5A) in your hand, hold it by your side, or place the device 1 in a dedicated carrying case (not shown) to carry the bag. can do.

  When using the device 1 in the screen storage state (FIGS. 4 and 5A), the leg 16 at the storage position A is rotated backward by approximately 90 ° to protrude rearward from the lower surface of the casing 3. Switch to the use position B. Then, the lock mechanism 80 is unlocked and the state is maintained. Thereby, the lock | rock with respect to the casing 3 of the upper cover 6 is cancelled | released. And the apparatus 1 is deferred on the installation surface F of usage places, such as a desk surface and a floor surface. Then, holding the handle portion 7 (pick it with a finger), the upper cover 6 is pulled upward against the screen entrainment force of the reel 31.

  As the upper cover 6 is pulled up, the screen 2 comes out of the opening 304 and is pulled out above the casing 3 while rotating the reel 31 in the direction opposite to the winding direction. Further, the telescopic boom 17 on the rear surface side of the screen 2 rises from the opening 304 to the upper side of the casing 3 (extends operation) from the state where it is folded in the casing 3.

  The telescopic boom 17 has a self-supporting function, and the screen 2 is stably supported at the height position even if the finger is released from the handle portion 7 at an arbitrary rising height position within the range in which the screen 2 is raised or lowered. Hold on. That is, as will be described later, the telescopic boom 17 balances the weight of the upper cover 6 and the screen 2 and the screen winding force of the reel 31 with the rising force of the telescopic boom 17 so that the screen 2 can be raised to an arbitrary height. Hold in a stable and stable position.

  FIG. 1 is a front view of the apparatus 1 in a state where the screen 2 is held in a stretched state that can be used by the self-supporting function of the telescopic boom 17. FIG. 2 is a rear (rear) view of the apparatus 1 in the state of FIG. FIG. 3 is a left side view of the apparatus 1 in the state of FIG. FIG. 6 is a rear view of the apparatus 1 in which the screen 2 is in the middle of pulling up or in the middle of lowering.

  The leg 16 balances the backward tilting force of the screen 2 raised during use of the device 1 and effectively prevents the backward tilt of the device 1. Further, the left cover 4 is provided with a support portion 401 protruding forward, or the right cover 5 is provided with a support portion 501 protruding forward. These support portions 401 and 501 balance with the forward tilting force of the screen 2 pulled up when the device 1 is used, and work together with the legs 16 to maintain the vertical state of the device 1. By projecting the left cover 4 and the right cover 5 forward and installing the support portions 401 and 501, the appearance and stability of the device 1 can be improved. The problem can also be solved by increasing the volume of the left cover 4 and the right cover 5 and increasing the ground contact area as required.

  When returning the device 1 in the screen extended state as shown in FIGS. 1 to 3 to the screen storage state (FIG. 4, FIG. 5A), the upper cover 6 is moved down by holding the handle portion 7 of the upper cover 6. To do. As a result, the screen 2 is wound around the reel 31 by the winding force of the reel 31, moves back from the opening 304 into the casing 3, and is stored. In addition, the telescopic boom 17 is moved in the direction in which it is folded and stored in the casing 3 through the opening 304. When the upper cover 6 is sufficiently lowered and moved relative to the casing 3, the upper cover 6 is positioned corresponding to the opening 304 on the upper surface of the casing 3 and closes the opening 304. In this state, the leg 16 at the use position B is rotated to the left by about 90 ° to be converted into the storage position A in the projection plane on the lower surface of the casing 3. Then, the lock mechanism 80 is locked and the state is maintained. Thereby, the upper cover 6 is locked with respect to the casing 3, and the state is hold | maintained.

(Lock mechanism 80)
Next, the lock mechanism 80 will be described. This will be described with reference to FIGS. FIG. 7 is a perspective view of the device 1 with the lock mechanism 80 disassembled, where (a) is a view of the rear surface side of the device 1 viewed from the right side, and (b) is a view of the rear surface side of the device 1 viewed from the left side. . The reel 31 and the screen 2 are omitted in the figure. FIG. 8 is an exploded perspective view of the main part of the lock mechanism 80. FIG. 9A is an explanatory diagram in the locked state, and FIGS. 9B and 9C are explanatory diagrams in the unlocked state.

  A meshing portion 8 is provided on the inner side of the central portion in the longitudinal direction of the upper cover 6. The meshing portion 8 has a left-facing hanger portion (hook portion) 8a. On the other hand, a meshed portion 9 facing the meshing portion 8 is provided upward inside the longitudinal center of the casing 3.

  The lock mechanism 80 includes the meshing portion 8 and the meshed portion 9. The engaged portion 9 includes a holder 10, a slide lock 11, a reset spring (biasing member) 12, a rotating shaft (lock releasing member) 13, and the like. The holder 10 is fixed to the inner bottom surface of the casing 3 with screws or rivets. Or it is fixed by other methods. The slide lock 11 is disposed inside the holder 10 so as to be slidable in the left-right direction. That is, the convex portion 1101 of the slide lock 11 and the slide groove 1001 of the holder 10 are matched, and the slide lock 11 is slid along the slide groove 1001 in the holder 10 so as to be slidable in the left-right direction. . The spring 12 is also built in the holder 10. One end of the spring 12 is fitted into the spring hole 1102 on the left end side of the slide lock 11. The other end of the spring 12 is received by the left stopper portion 1002 in the holder 10. That is, the spring 12 is contracted between the left end side of the slide lock 11 and the stopper portion 1002. Thereby, the slide lock 11 is always urged to move rightward in the holder 10 by the compression reaction force of the spring 12.

  A slit hole 1003 through which the meshing portion 8 on the upper cover 6 side enters and exits is formed on the upper surface of the holder 10. The slide lock 11 is also formed with a slit hole 1103 through which the meshing portion 8 enters and exits. The slit hole 1003 and the slit hole 1103 have a corresponding relationship and overlap each other. As the slide lock 11 moves in the left-right direction, the amount of overlap changes.

  A vertical through-hole 1004 is provided on the right side of the holder 10. A through hole 302 corresponding to the above through hole 1004 is provided on the bottom surface of the casing 3. In a state where the holder 10 is positioned and fixed on the inner bottom surface of the casing 3 in a predetermined manner, the through hole 1004 and the through hole 302 are aligned on the same axis. The rotating shaft 13 is inserted into the through hole 1004 from the upper surface side of the holder 10. An overhang portion 1305 is provided at the upper end portion of the rotating shaft 13. The overhanging portion 1305 is received on the upper surface of the holder 10, and the rotating shaft 13 is held by the holder 10. The lower end portion of the rotary shaft 13 passes through the through holes 1004 and 302 and protrudes outward from the bottom surface of the casing 3. A cylindrical washer 14 is fitted into the lower end protruding portion of the rotating shaft 13. Reference numeral 1401 denotes a cylindrical hole of the washer 14. The upper half portion of the washer 14 passes through the through hole 302, and the lower half portion is located outside the bottom surface of the casing 3. The washer 14 serves to make the axis of the rotary shaft 13 coincide with the axis of the through hole 1004 and the through hole 302.

  The lowermost end portion of the rotating shaft 13 is a rectangular head portion 1302. The rectangular head portion 1302 is inserted into a square hole 1601 formed on the base side of the leg 16. And the leg 16 and the square head part 1302 of the rotating shaft 13 are fixedly connected by the screw 15. With this structure, the rotary shaft 13 is connected to the leg 16 in conjunction with a rotation operation of approximately 90 ° from the storage position A to the use position B of the leg 16 and conversely approximately 90 ° rotation operation from the use position B to the storage position A. Rotate forward and backward approximately 90 ° together with 16. An arcuate or crescent-shaped slot 1301 (cam portion) perpendicular to the direction of the rotation axis is provided in the middle portion of the rotation axis 13. The right end side of the slide lock 11 corresponds to the slot 1301.

  When the leg 16 is in the use position B, the slot 1301 of the rotating shaft 13 faces rearward. Therefore, the slide lock 11 is held in a state in which the slide lock 11 is slid to the left against the pressing force of the spring 12 on the horizontal arc surface of the slot 1301 of the rotary shaft 13. In this state, the overlap amount of the slit hole 1103 of the slide lock 11 with respect to the slit hole 1003 of the holder 10 is large. Therefore, the meshing portion 8 on the upper cover 6 side can go in and out without catching both the slit hole 1003 of the holder 10 and the slit hole 1103 of the slide lock 11. Therefore, when the device 1 in the screen extended state (FIGS. 1 to 3) is returned to the screen storage state (FIG. 4 and FIG. 5A), the meshing portion 8 on the upper cover 6 side becomes the meshed portion 9. It fully enters the holder 10 through the slit hole 1003 and the slit hole 1103 on the side.

  When the leg 16 is rotated from the use position B to the storage position A, the slot 1301 of the rotating shaft 13 is turned to the left. Then, the right end portion of the slide lock 11 enters the slot 1301, and the slide lock 11 is slid to the right by the urging force of the spring 12 and held at that position. In this state, the overlap amount of the slit hole 1103 of the slide lock 11 with respect to the slit hole 1003 of the holder 10 is small, and the left end portion of the slit hole 1103 of the slide lock 11 is the hanger portion 8 a facing the left of the meshing portion 8. It enters the state that entered. As a result, the meshing portion 8 is latched to the meshed portion 9. That is, the upper cover 6 is locked with respect to the casing 3. FIG. 9A is a cutaway perspective view of the lock mechanism 80 in the locked state.

  In the locked state of FIG. 9A, when the leg 16 is rotated from the storage position A to the use position B, the slot 1301 of the rotating shaft 13 is turned from the left to the rear. As a result, as described above, the slide lock 11 is held in a state in which it slides to the left against the pressing force of the spring 12 on the horizontal arc surface of the slot 1301 of the rotary shaft 13. In this state, the overlap amount of the slit hole 1103 of the slide lock 11 with respect to the slit hole 1003 of the holder 10 increases, and the left end portion of the slit hole 1103 of the slide lock 11 escapes from the left hanger portion 8 a of the meshing portion 8. Come off. That is, the lock of the meshing portion 8 with respect to the meshed portion 9 is released. FIGS. 9B and 9C are cutaway perspective views of the lock mechanism 80 in the unlocked state. The meshing portion 8 is easily pulled out from the slit holes 1103 and 1003 when the upper cover 6 is pulled upward.

  The projecting portion 1305 of the rotating shaft 13 is formed with an approximately 90 ° arc-shaped notch groove portion 1304. A stopper projection 1005 is provided on the upper surface of the holder 10. When the leg 16 is rotated by approximately 90 ° from the storage position A to the use position B, one end of the notch groove 1304 abuts against the stopper projection 1005, thereby preventing further rotation of the leg 16. . Further, the rotation position (use position B) of the leg 16 is held by the engagement between the overhanging portion 1305 and the elastic click stopper 1303 provided on the upper surface of the holder 10 and the receiving hole 1006. Further, when the leg 16 is rotated approximately 90 ° from the use position B to the storage position A, the other end of the notch groove 1304 abuts against the stopper projection 1005, thereby preventing further rotation of the leg 16. Is done. Further, the rotation position (storage position A) of the leg 16 is held by the engagement between the protruding portion 1304 and the elastic click stopper 1303 provided on the upper surface of the holder 10 and the receiving hole 1007.

  As described above, since the operation of locking and unlocking the upper cover 6 with respect to the casing 3 can be completed only by rotating the support leg 16 in the process of changing between the screen storage state and the screen extension state, the operation is simple and convenient. is there.

(Extensible boom 17)
Next, the telescopic boom 17 will be described. The telescopic boom 17 is disposed between the casing 3 and the upper cover 6 on the rear surface side of the screen 2 and is capable of standing up and folding to hold the screen 2 in a stretched state and has a self-supporting function. It is a screen support mechanism.

  The telescopic boom 17 in this embodiment has a pair of left and right symmetrically arranged with the vertical line S as an axis of symmetry when S is a vertical line (virtual line) in the center of the width direction (left and right direction) of the screen 2. The left telescopic boom 17L and the right telescopic boom 17R are configured. The handle portion 7, the meshing portion 8, and the meshed portion 9 are substantially located on the vertical line S.

  The left telescopic boom 17L has a lower left support that is hinged to the casing 3 so as to be rotatable about a longitudinal axis 31L at a position where the lower end of the casing 3 is moved to the left side of the meshed portion 9. It has an arm 27L. Further, a left upper support arm 26L hinged to the upper cover 6 so as to be rotatable about a longitudinal axis 32L at a position where the upper end portion is located closer to the left side of the meshing portion 8 inside the upper cover 6 is provided. Have. And the upper end part of the arm 27L and the lower end part of the arm 26L are rotatably connected by the left hinge joint 18L. The left hinge joint 18L is located on the left side of the shafts 31L and 32L.

  The right telescopic boom 17R is a right lower support that is hinged to the casing 3 so as to be rotatable about a longitudinal axis 31R at a position where the lower end of the casing 3 is moved to the right side of the meshed portion 9. It has an arm 27R. Further, a right upper support arm 26R that is hinged to the upper cover 6 so as to be rotatable around a shaft 32R in the front-rear direction at a position where the upper end portion is located closer to the left side of the meshing portion 8 inside the upper cover 6 is provided. Have. And the upper end part of the arm 27R and the lower end part of the arm 26R are rotatably connected by the right hinge joint part 18R. The right hinge joint 18R is located on the right side of the shafts 31R and 32R.

  The hinge connection of the arms 27L and 27R with respect to the casing 3 can be made at the central portion of the casing 3 in the left-right direction. The hinge connection of the arms 26L and 26R to the upper cover 6 can also be made at the center of the upper cover 6 in the left-right direction. Each of the arms 27L and 26L and 27R and 26R is a rod-like member having rigidity, and for example, a metal pipe material having a cross-sectional cylindrical shape or a rectangular shape can be used. In this embodiment, each of the arms 27L, 26L, 27R, 26R has a length dimension that is substantially the same as one half of the width dimension of the screen 2.

  With the above-described configuration, the telescopic boom (L-type folding support arm mechanism) 17 (17L / 17R) capable of rising operation and folding operation is configured. This will be described in more detail as follows.

  The upper ends of the arms 26 </ b> L and 26 </ b> R on the left and right sides are hinge-connected at the center of the upper cover 6 or at positions slightly closer to both ends in a state where the front and rear positions do not overlap in the left-right direction. In addition, the arms 27L and 27R on both the left and right sides are hinged at the center of the casing 3 or at positions slightly closer to both ends in a state where the front and rear positions do not overlap in the left-right direction. In order to realize this, hinge joints 18L and 18R that can be fitted from the outside are used. The hinge joints 18L and 18R allow the lower ends of the arms 26L and 26R on the left and right sides and the upper ends of the arms 27L and 27R on the same side to be hinged to each other, and the telescopic boom 17 (17L and 17R) can be further extended and contracted Configure.

  By hinge-connecting the two hinge joints 18L and 18R of the arms 26L and 26R on both the left and right sides and the arms 27L and 27R on the left and right sides, the hinge joint 18L constituting the left telescopic boom 17L is positioned on the far left side. To do. In addition, the left telescopic boom 17L is further to the left than the hinge connection points 31L and 32L connected to the casing 3 and the upper cover 6. On the other hand, the hinge joint 18R constituting the right telescopic boom 17R is located on the right side all the time. In addition, the right telescopic boom 17R is further to the right than the hinge connection points 31R and 32R connected to the casing 3 and the upper cover 6.

  With respect to the telescopic booms 17L and 17R on the left and right sides, the screen 2 is adjusted from the screen storage state stored in the casing 3 to the maximum screen extended state. Thereby, in the maximum extension state of the telescopic boom 17, the two lower end portions of the arms 26L and 26R and the two upper end portions of the 27L and 26R maintain a cross state, and at the same time, the two hinge joint portions 18L and 18R are left and right. They do not overlap in the direction and are on the same straight line in the front-rear direction. The telescopic boom 17 can stably control the upward and downward movement of the screen 2 by pulling up or pushing down the upper cover 6, and can effectively control the jumping up of both ends of the upper cover 6.

  FIG. 10 is a rear view of the right hinge joint 18R when the telescopic boom 17 is raised, and FIG. 11 is a rear view of the right hinge joint 18R when the telescopic boom 17 is folded. is there. The left hinge joint 18L has the same configuration. The upper hinge unit 19 of the hinge joint 18 (L / R) is provided with an opening position restricting convex portion 1902, and the lower hinge unit 20 is provided with an opening position restricting support unit 2002.

  The upper hinge unit 19 and the lower hinge unit 20 rotate around the screw 21 that is the hinge joint center (hinge joint rotation center) in the opening direction, and the opening position restricting convex portion 1902 is used for opening position restriction. It hits the support unit 2002. As a result, the hinge joint 18 stops rotating. That is, further rotation of the hinge joint 18 in the opening direction is prevented. At this time, the inner angle between the lower support arms 27L and 27R on both the left and right sides of the telescopic boom 17 and the upper support arms 26L and 26R on the left and right sides becomes the maximum value, and further rising operation of the telescopic boom 17 is prevented. . As a result, the screen 2 is pulled out to the maximum and expanded.

  Note that the above-described restriction points 1902 and 2002 are not limited to the positions shown in FIGS. The positions of the opening position restricting convex portion 1902 and the opening position restricting support unit 2002 are set as required. Accordingly, different limiting points 1902 and 2002 are arbitrarily set when the inner angle between the lower support arms 27L and 27R on the left and right sides of the telescopic boom 17 and the upper support arms 26L and 26R on the left and right sides is 180 degrees or less. be able to.

  Since the restriction points 1902 and 2002 are provided at the left and right hinge joints 18L and 18R, the maximum drawer use state of the screen 2 can be stably restricted. However, the restriction points 1902 and 2002 can be installed at one of the left and right hinge joints 18L and 18R. Further, the opening position restricting convex portion 1902 may be disposed on the lower hinge unit 20 side, and the position restricting support unit 2002 may be disposed on the upper hinge unit 19 side.

  When the screen 2 is changed from the extended state to the retracted state, the telescopic boom 17 is folded and folded in the casing 3 by pushing down the upper cover 6, and the screen 2 is reel 30 in the casing 3. Get involved in. FIG. 12 is a longitudinal sectional view of the device 1 when the telescopic boom 17 is fully folded in the casing 3.

  Next, the self-supporting function mechanism of the telescopic boom 17 will be described with reference to FIGS. FIG. 13 is a cutaway rear view of the screen device when the telescopic boom 17 is standing up. FIG. 14 is an explanatory diagram of a start-up biasing device for the telescopic boom 17. In this embodiment, urging devices (stress devices) for starting up and urging the self-supporting function mechanism of the telescopic boom 17 are incorporated in the hollow portions of the lower support arms 27L and 27R on the left and right sides, respectively. . Since the biasing devices built in the hollow portions of the left lower support arm 27L and the right lower support arm 27R are symmetrical and have the same mechanism, the biasing device built in the right lower support arm 27R will be mainly described as a representative.

  Inside the lower end of the arm 27R, there is disposed a spring fixing component 100 that is rotatable about a shaft 31R that is the rotation center of the arm 27R. A tension coil spring 28 is inserted into the arm 27 </ b> R, and the lower end of the spring 28 is connected to the fixed component 100. That is, the lower end of the spring 28 is connected to the arm 27R. One end of a flexible tension cable (tension wire) 29 is connected to the upper end of the spring 28 via a cable grip (cable grip) 2901. The other end of the cable 29 is extended to reach the end of the upper hinge unit 19 via the cable guide groove 2001 of the lower hinge unit 20 of the hinge joint 18R and the U-shaped cable guide groove 1901 of the upper hinge unit 19. . The upper hinge unit 19 is locked by a stopper 2902. That is, it is connected to the arm 26R. The spring 28 always tensions the cable 29 with a predetermined pulling force. The urging device on the left lower support arm 27L side has the same structure as the urging device on the right lower support arm 27R.

  With this structure, the right upper support arm 26R is always urged to rotate in the opening direction around the right hinge joint 18R by the tension of the cable 29 due to the pulling force of the spring 28 with respect to the right lower support arm 27R. The above opening direction is a direction in which the inner angles of the arms 27R and 26L are increased. Further, the left upper support arm 26L is always urged to rotate in the opening direction around the left hinge joint 18L by the tension of the cable 29 due to the pulling force of the spring 28 with respect to the left lower support arm 27L. The above opening direction is a direction in which the inner angles of the arms 27L and 26R are increased.

  That is, the telescopic boom 17 is always urged in the rising direction by the tension of the cable 29 due to the pulling force of the spring 28. The telescopic boom 17 has a self-supporting function that holds the screen 2 in a state where it is stably supported at that height position even if the hand is released from the handle portion 7 at any rising height position within the range where the screen 2 is raised or lowered. Have. That is, the weight of the upper cover 6 and the screen 2 and the screen winding force of the reel 31 and the rising force by the urging devices 28 and 29 of the telescopic boom 17 are balanced to bring the screen 2 to an arbitrary rising height. Hold in a stable and stable position. That is, the screen 2 can be arbitrarily determined by the force of balancing the spring 28, the frictional force of the hinge connection portion at the hinge joint 18, the weight of the screen 2, etc. at the lower support arm 27, and the winding force of the lifting screen 1. Altitude can be maintained.

  As shown in FIGS. 11 and 12, there is a tension guide groove 1901 through which the cable 29 passes on the hinge joint 18R (18L). The groove 1901 is a U-shaped eccentric groove. The pulling guide groove 1901 forms a semicircular groove a at the bottom of the U shape, and forms straight grooves b and b on both sides of the U shape. The distance from the groove bottom surface of the semicircular groove a portion to the hinge joint center (screw) 18 is relatively long. The distance from the groove bottom surface of the straight grooves b and b to the hinge joint center 18 is short. That is, the distance from the groove bottom surface of the straight grooves b and b to the hinge joint center 18 is shorter than the distance from the groove bottom surface of the semicircular groove a part to the hinge joint center 18. The tension of the spring 28 is set so that the screen 2 moves slowly downward and the screen 2 can be held at an arbitrary height position.

  When the extension length of the spring 28 varies with the change in the opening angle of the hinge joints 18L and 18R in the rising operation and folding operation of the telescopic boom 17, the generated tension varies. However, in practice, the screen 2 can be arbitrarily selected by combining the acting force of the spring 28, the frictional force of the hinges at the hinge joints 18L and 18R, the weight of the screen of the lower support arm and the collecting action force of the screen. It can be held at a high height position.

  The semicircular groove a portion of the pulling guide groove 1601 through which the cable 29 is passed over the hinge joints 18L and 18R may be set to an elliptical shape. Straight grooves and semicircular grooves (or elliptical grooves) are set to be tangent so that the cable rotates freely. In addition, the tangent may not be set, and the positions of the two straight grooves may not be parallel.

  As shown in FIG. 15, the hinge joint 18 (L · R) has a rectangular parallelepiped upper hinge unit 19 that is inserted into the lower end of the upper support arm 26 (L · R). Moreover, it has the lower hinge unit 20 of the rectangular parallelepiped inserted in the upper end of the lower support arm 27 (LR). Further, a friction plate 23 is provided between the upper hinge unit 19 and the lower hinge unit 20. In addition, a rotation sleeve 25 that penetrates the upper hinge unit 19 and the lower hinge unit 20 is provided. In addition, it has a washer 24 on both sides of the lower hinge unit 20, a screw 21 and a nut 22 that are hinged so that the upper hinge unit 19 and the lower hinge unit 20 can freely rotate.

  A friction plate 23 is provided between the upper hinge unit 19 and the lower hinge unit 20. The friction plate 23 can rub against the friction portion 1903 of the upper hinge unit 19 and the friction portion 2003 of the lower hinge unit 20 to effectively control the receiving force of the hinge joint portion 18. Pulling guide grooves 1901 and 2001 through which the cable 29 is passed are provided on the hinge joint 18 (L and R). The upper hinge unit 19 is provided with a U-shaped cable guide groove 1901. The lower hinge unit 20 is provided with a cable guide groove 2001. The cable 29 passes through the U-shaped cable guide groove 1901 of the upper hinge unit 19 and the cable guide groove 2001 of the lower hinge unit 20.

  Here, in addition to the above-described attachment state, the following attachment form may be adopted. That is, one end of the spring 28 is attached to the upper support arm 26 (LR) by the spring fixing part 100. The other end may be connected to the lower support arm 27 (LR) via the cable 29 via the hinge joint 18 (LR). Alternatively, other attachment methods can be employed. The urging devices 28 and 29 for urging the telescopic boom 17 in the raising direction are provided only on one side of the left lower support arm 27L and the left upper support arm 26R, and the right lower support arm 27R and the right upper support arm 26R. It is also possible to adopt a configuration arranged in the above.

[Example 2]
FIG. 16 shows another configuration example of the telescopic boom 17. In the present embodiment, the upper ends of the upper support arms 26L and 26R are hinged to the left and right ends of the upper cover 6, and the lower ends of the lower support arms 27L and 27R are hinged to the left and right ends of the casing 3, respectively. 31L and 31R. Then, the upper support arms 26L and 26R on the left and right sides and the lower support arms 27L and 27R on the left and right sides are connected by two hinge joint portions 18L and 18R. The left hinge joint 18L constituting the left telescopic boom 17L is always on the left side of the vertical line S, and is on the right side of the hinge connection points 31L and 32L on the upper cover 6 side and the casing 3 side. The right hinge joint 18R constituting the right telescopic boom 17R is always on the right side of the vertical line S and is on the left side of the hinge connection points 31R and 32R on the upper cover 6 side and the casing 3 side.

  The screen devices 1 of the first embodiment and the second embodiment are summarized as follows.

  (1) It has the casing 3 which is long in the left-right direction when the screen device 1 is viewed from the front side, and the upper surface side is opened as the opening 304 along the longitudinal direction. The reel 31 is disposed inside the casing 3 and is long in the left-right direction and is urged to rotate in one direction. The lower end portion is locked to the reel 31 and has a flexible screen 2 wound around the reel 31. It has an upper cover 6 corresponding to the opening that is long in the left-right direction and that locks the upper end of the screen 2. On the rear surface side of the screen 2, there is a telescopic boom 17 that is disposed between the casing 2 and the upper cover 6 and is folded and housed inside the casing 3 and has a self-standing function. The upper cover 6 has a meshing portion 8 provided at the center in the left-right direction. It has the meshing part 9 provided in the center part of the left-right direction of the casing 3. The meshed portion 9 meshes with the meshing portion 8 when the screen 2 and the telescopic boom 17 are stored in the casing 3. A support leg 16 provided on the lower surface of the central portion in the left-right direction of the casing 3, which can be rotated backward with respect to the casing 3 so that the screen-stretched apparatus 1 placed on the installation surface does not tilt backward. The support leg 16 is supported.

  (2) The meshed portion 9 operates in conjunction with the rotation of the support leg 16. In a state where the screen 2 and the telescopic boom 17 are housed in the casing 3, the meshed portion 9 operates in the direction of meshing with the meshing portion 8 when the support leg 16 is rotated in a posture parallel to the left-right direction. When the support leg 16 is rotated backward relative to the casing 3, the meshed portion 9 operates in a direction in which the meshing with the meshing portion 8 is released.

  (3) The meshed portion 9 has a slide lock 11 that is urged and moved by the urging member 12 in the locking direction that meshes with the meshed portion 8. The slide lock 11 has a lock release member 13 that moves back in the direction opposite to the moving biasing direction against the biasing force of the biasing member 12.

  (4) The lock release member 13 is a rotating shaft, and the rotating shaft 13 rotates integrally with the rotation of the support leg 16 to operate the slide lock 11.

  (5) The rotating shaft 13 has a cam portion 1301, and the slide lock 11 corresponds to the cam portion 1301. The cam portion 1301 operates the slide lock 11 in the direction of meshing with the meshing portion 8 when the support leg 16 is rotated in a posture parallel to the left-right direction. When the support leg 16 is rotated backward with respect to the casing 3, the slide lock 11 is operated in a direction in which the meshing with the meshing portion 8 is released.

  (6) The left cover 4 at the left and right ends of the casing 3 and the support portions 401 and 501 provided on the front side of the right cover 5 are provided. The support portions 401 and 501 prevent the forward-facing tilt of the screen-stretched device 1 placed on the installation surface F, and keep the screen-stretched device 1 in a vertical state in cooperation with the support legs 16.

  (7) The telescopic boom 17 is configured by connecting the upper and lower arms 26 (LR) and 27 (LR) at the hinge joint 18 (LR). One arm 27 (LR) has a hollow portion with one end of a tension spring 28 connected to the arm 27 (LR). One end of a tension cable 29 is connected to the other end of the tension spring 28. The other end of the tension cable is connected to the other arm 26 (LR) via the hinge joint 18 (LR). The urging of the telescopic boom 17 by the pulling force of the tension spring 28 is balanced with the screen winding force of the reel 31 and the force of the upper cover 6 and the handle 7 in the folding direction of the telescopic boom 17. Thereby, it has the self-supporting function which supports the screen 2 in arbitrary rising height positions.

  (8) The telescopic boom 17 is composed of a left telescopic boom 17L and a right telescopic boom 17R disposed symmetrically about the vertical line S at the center in the left-right direction of the screen 2 as a symmetry axis.

  A screen device (self-supporting portable manual lifting screen device) 1 is composed of assembly parts such as a casing 3, an upper cover 6, a left cover 4, a right cover 5, a folding telescopic boom 17, a screen 2, and a reel 31. One end of the screen 2 is connected to the upper cover 6 and the other end is mounted on the reel 31 by using the elasticity of the reel 31. The reel 31 is used to wind the screen 2 and is mounted in the casing 3 with a rotational biasing force applied in the direction in which the screen 2 is wound, and both ends thereof are axially connected to the left cover 4 and the right cover 5, respectively. Thus, it is ensured that the reel 31 is stably kept horizontal. Further, the foldable telescopic boom 17 is sandwiched between the upper cover 6 and the casing 3. In the folding telescopic boom 17, one end shaft 32 (L · R) supports the upper cover 6, and the other end shaft 31 (L · R) is hingedly connected to the casing 3. Biasers 28 and 29 are attached to the boom 17 and support the top cover 6 to ensure that the screen 2 maintains a specified height. When the screen 2 is housed in the casing 3, the boom 17 is built in the casing 3 in parallel. In order to reduce the volume of the casing 3, the booms 17 are located on both the left and right sides of the substantially central portion of the screen 2 in the left-right width direction. The boom 17L on the left side in the left-right width direction of the screen 2 has a shaft 32L at one end positioned slightly to the left from the center of the upper cover 6. The other end of the shaft 31L is located slightly to the left from the center of the casing. The hinge joint 18L is installed on the left side of the left and right center. The boom 17 </ b> R on the right side in the left-right width direction of the screen 2 has a shaft 32 </ b> R at one end positioned slightly to the right from the center of the upper cover 6. The other end of the shaft 31R is located slightly to the right from the center of the casing. The hinge joint portion 18R is installed on the right side with respect to the left and right center portion. When the screen 2 is extended, or when changing its appearance in the vertical direction, or when the screen is stored in the casing 3, the two booms 17L and 17R are in the horizontal direction and the front and rear positions are not overlapped. It expands and contracts. Thereby, when the size of the screen 2 is not large, the screen 2 is stably supported and the volume of the casing 3 is reduced.

  A support leg 16 is provided at the lower part of the central part of the casing. A saleg 16 is hinged to the lower part of the central part of the casing and can be rotated backward. The leg 16 moves and rotates the rotating shaft 13 to prevent the screen 2 from tilting backward. When the screen 2 is stored, the center of gravity of the screen 2 is low and the device 1 can be supported only by the left cover 4 and the right cover 5, so that the leg 16 rotates until it is parallel to the casing 3. 3 under. When the screen 2 is extended, the telescopic boom 17 supports the upper cover 6, so that the center of gravity of the device 1 is moved upward, and the left cover 4 and the right cover 5 alone support the device 1 so that it does not tilt backward. It becomes difficult. By increasing the ground contact area between the left cover 4 and the right cover 5, the above problem can be solved. However, doing so increases the volume and weight of the device 1. Therefore, by rotating the leg 16 backward until it is perpendicular to the casing 3, the leg 16 can balance the backward tilting force of the device 1 and effectively prevent the device 1 from tilting backward.

  As described above, when the screen 2 is housed in the casing 3, the center of gravity of the device 1 is low, and the device 1 can be supported only by the left cover 4 and the right cover 5. However, since the telescopic boom 17 supports the upper cover 6 when the screen 2 is extended, the center of gravity of the device 1 is moved upward, and the left cover 4 and the right cover 5 alone do not tilt the device 1 backward. It becomes difficult to support. In order to solve the above-described problem, the support portions 401 and 501 are installed in front of the left cover 4 and the right cover 5. When the device 1 is in use, the support parts 401 and 501 balance the forward tilting force of the device 1 and work together with the support leg 16 in the middle of the casing to bring the device 1 into a vertical state.

  A meshing portion 8 is provided at the center of the upper cover 6. When the screen 2 is housed in the casing 3, the meshing portion 8 constitutes a screen device 1 that can mesh with and be transported with the meshed portion 9 in the central portion of the casing. The meshed portion 9 at the center of the casing includes a holder 10, a slide lock 11, a reset spring 12, and the like. The holder 10 is fixedly attached to the central portion in the casing 3. The holder 10 is provided with a slide groove 1001, a slit hole 1003, a stopper portion 1002, and the like. The slide lock 11 is provided with a convex portion 1101, a slit hole 1103, and a spring hole 1102. The convex portion 1101 of the slide lock 11 matches the slide groove 1001 of the holder 10. The slide lock 11 slides along the slide groove 1001 in the holder 10. One end of the reset spring 12 is fitted into the spring hole 1102 of the slide lock 11, and the other end presses the stopper portion 1002 of the holder 10, thereby providing a biasing force to the slide lock 11. When the screen 2 changes from the extended state to the retracted state, the upper cover 6 compresses the folding telescopic boom 17 downward. Further, the engaging portion 8 at the center of the upper cover 6 enters the slit hole 1003 of the holder 10 of the engaged portion 9 and the slit hole 1103 of the slide lock 11. Then, the slide lock 11 is engaged with the meshing portion 8 by the elasticity of the reset spring 12, and the locking operation is completed.

  An unlocking device that slides in the axial direction of the reset spring 12 may be installed. However, in order to realize the unlocking, it is necessary to add parts and increase the operation steps, which is disadvantageous for the convenience of the device 1 . Therefore, in order to solve the above-described unlocking problem, unlocking is realized using the support leg 16 and the rotating shaft 13.

  Specifically, it is as follows. The leg 16 is hinged to the lower part of the central part of the casing and can be rotated backward. The leg 16 is rotated by moving the rotary shaft 13. The rotary shaft 13 is provided with an arcuate or crescent-shaped slot 1 (cam portion) 301 perpendicular to the rotary shaft 13. When the screen 2 is stored in the casing 3, the leg 16 that is rotating rearward of the casing 3 is rotated in a state parallel to the casing 3. Then, the rotating shaft 13 rotates, and the slide lock 11 of the meshing portion 9 in the central portion of the casing is fitted into the slot 1301 of the rotating shaft 13 to complete the locking operation. When the screen 3 is in the extended state, the leg 16 is rotated to the rear of the casing 3. As a result, the rotating shaft 13 is rotated, and the slot 1301 moves the slide lock 11 in the direction opposite to the urging direction of the spring 12 to release the meshing portion 8 to complete the unlocking operation. Enable. As described above, the support leg 16 and the rotary shaft 13 are a lock mechanism and a lock release mechanism, and can be easily operated and have convenience.

  The telescopic boom 17 has two support arms 26 (LR) and 27 (LR) connected by a hinge joint 18 (LR). The telescopic boom 17 is provided with a spring 28 that acts in a direction in which the telescopic boom 17 is folded and repelled. One end of the spring 28 is built in the one support arm 27 (L · R), and the other end passes through the hinge joint 18 (L · R) via the cable 29 and the other support arm 26 (L · R).・ Connect to R). The hinge joint 18 (L / R) is provided with pulling guide grooves 1901 and 2001 through which the cable 29 passes. There is a pair of friction plates 23 between the connecting surfaces of the hinge joints 18 (L and R). A preload is set by adjusting the looseness of the nut 22 by connecting the hinge part and the friction plate using the screw 21 and the nut 22, and further adjusting the magnitude of the frictional force. When the opening position of the screen 2 is changed, if the force necessary to fix the screen 2 to a certain position is balanced only by the pulling force of the spring 28, the design with the pulling force of the spring 28 becomes difficult. Further, the greater the pulling force of the spring 28, the greater the deformation that occurs because the telescopic boom 17 receives the force. If the cross-sectional areas of the upper and lower arms 26 (L · R) and 27 (L · R) are increased, the strength can be improved. Therefore, in order to solve the above-described problem, a friction force between the hinge portion and the friction plate is applied. This simplifies the design requirement for the pulling force of the spring 28, reduces the pulling force of the spring 28, and improves the deformation of the upper and lower arms 26 (LR) and 27 (LR). In the hinge joint portion 18 (L / R), an opening position limiting convex portion 1902 is provided on the upper hinge portion 19, and an opening position limiting support portion 2002 is provided on the lower hinge portion 20. When the hinge joint 18 (L / R) rotates at a certain angle, the opening position limiting convex portion 1902 on the upper hinge portion 20 collides with the opening position limiting support portion 2002 on the lower hinge portion 20. As a result, the hinge joint 18 (LR) stops rotating, the telescopic boom 17 is fixed at a specified angle, and the maximum extended position of the screen 2 is determined. By setting the positions of the limiting portions 1902 and 2002, the rotation angle of the hinge joint portion 18 (LR) can be adjusted.

  DESCRIPTION OF SYMBOLS 1 ... Screen apparatus, 2 ... Screen, 3 ... Casing, 304 ... Opening part, 31 ... Reel, 6 ... Upper cover, 8 ... Meshing part, 9 ... Meshing part, 16 ... Support Leg, 17 ... telescopic boom

Claims (7)

A casing that is long in the left-right direction when the screen device is viewed from the front side, and whose upper surface side is open as an opening along the length;
A reel that is disposed inside the casing, is long in the left-right direction, and is urged to rotate in one direction;
A flexible screen having a lower end locked to the reel and wound around the reel;
An upper cover corresponding to the opening, which is long in the left-right direction, and which locks the upper end of the screen;
On the rear surface side of the screen, a telescopic boom that is disposed between the casing and the upper cover and is folded and accommodated inside the casing,
A meshing portion provided at a central portion in the left-right direction of the upper cover;
A meshed portion provided at a central portion of the casing in the left-right direction, and when the screen and the telescopic boom are stored in the casing, a meshed portion that meshes with the meshed portion;
A support leg provided on the lower surface of the central portion in the left-right direction of the casing, which can be rotated rearward with respect to the casing so that the screen-stretched device placed on the installation surface does not tilt backward. A support leg to support,
The meshed portion operates in conjunction with the rotation of the support leg, and the support leg is rotated in a posture parallel to the left-right direction in a state where the screen and the telescopic boom are housed in the casing. Sometimes the meshed portion operates in a direction to mesh with the meshed portion, and when the support leg is rotated backward with respect to the casing, the meshed portion operates in a direction in which meshing with the meshed portion is released. A screen device characterized by: The engaged portion includes a slide lock that is moved and urged by an urging member in a locking direction that engages with the engaging portion, and a sliding direction that moves the slide lock against an urging force of the urging member. The screen device according to claim 1 , further comprising: an unlocking member that moves back in a reverse direction. The screen device according to claim 2 , wherein the unlocking member is a rotating shaft, and the rotating shaft rotates integrally with the rotation of the support leg to operate the slide lock. The rotating shaft has a cam portion, and the slide lock corresponds to the cam portion, and the cam portion engages the slide lock when the support leg is rotated in a posture parallel to the left-right direction. is operated in a direction to mesh with the parts, according to claim 3 wherein the support legs, characterized in that to operate in the direction in which the meshing is released and the slide lock said engaging portion when being rotated rearward with respect to said casing A screen device according to claim 1. The support part provided on the front side of the left cover and the right cover of the right and left ends of the casing, preventing forward tilting of the screen-expanded device placed on the installation surface, and in a screen-expanded state in cooperation with the support leg screen device according to any one of claims 1 to 4, characterized in that it has a support portion to maintain the vertical position of the device. The telescopic boom is constructed by connecting the upper and lower arms with a hinge joint, and one arm of the tension spring is connected to the hollow portion of the telescopic boom, and the other end of the tension spring. One end of a tension cable is connected to the other end, and the other end of the tension cable is connected to the other arm via the hinge joint, and the extension boom is raised by the pulling force of the tension spring. And a self-supporting function that supports the screen at an arbitrary rising height position by balancing the screen entrainment force of the reel and the force in the folding direction of the telescopic boom due to the weight of the upper cover. screen device according to any one of claims 1 to 5, characterized in that. The telescopic boom of claim 1 to claim, characterized in that it is composed of a left telescopic boom and right telescopic boom which is arranged symmetrically to the vertical line as a symmetry axis at the center in the lateral direction of the screen 6 The screen device according to any one of the above.