JP2011028209A - Screen device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an effectively usable, convenient and portable screen device which satisfies the necessary height upon spreading thereof, which receives less force upon storage thereof, then, which does not cause damages thereof due to handling errors. <P>SOLUTION: Regarding the screen device, one end of each of springs 24 is connected to a lower support arm 22L or 22R, and the other end of each of the springs is connected to a cable 26, and connected to an upper support arm 21R or 21L through a hinge joint part 15L or 15R. A groove for inserting the cable 26 is formed in each of the hinge joint parts. The groove is eccentric, and composed of a semicircular groove and a straight groove, and then, the center of the shaft is separated from the circle center of the semicircular groove. The upper end hinge 6a of an L-shaped folding support arm mechanism 14 is connected to a handle cover 6 located at the longitudinal center part of an upper rod 401. A locking mechanism is also disposed in the cover 6, and the cover 6 is locked in the casing 3 in the screen storage state so as to cancel the upward elastic force from the mechanism 14. <P>COPYRIGHT: (C)2011,JPO&INPIT

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 describes a self-supporting 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. Has been.

  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 left-right width direction. It has a structure that is connected in a relatively rotatable manner.

JP 2004-046078 A

  The present invention is a further development of the above-described conventional configuration. The object of the present invention is to satisfy the required height when the screen is unfolded, the force received when the screen is stored is small, the screen is not damaged due to mishandling, and the use effect is good. An object is to provide a portable screen device that is light and portable.

  The typical configuration of the screen device according to the present invention for achieving the above object is that the screen device is long in the left-right direction when viewed from the front side, and the upper surface side is opened as an opening for entering and exiting the screen along the length. A casing which is disposed in the casing, is long in the left-right direction and is urged to rotate in one direction, and a lower end is locked to the reel, and is wound around the reel. A flexible screen, an upper connecting rod corresponding to the opening, which is long in the left-right direction and engages the upper end of the screen, and a central portion in the left-right direction of the upper connecting rod And a foldable support arm disposed between the casing and the upper connecting rod on the rear side of the screen. The folding support arm mechanism includes a left lower support having a lower end attached to a left end portion of the casing so as to be rotatable about a longitudinal axis. An arm, a right lower support arm having a lower end attached to the right end portion of the casing so as to be rotatable about a longitudinal axis, and a lower end relative to the upper end of the left lower support arm. A right upper support arm that is pivotably coupled via a right hinge joint, and whose upper end is pivotally attached to a central portion of the upper connecting rod in the left-right direction about a longitudinal axis; The lower end of the right lower support arm is pivotally coupled to the upper end via a left hinge joint, and the upper end is the longitudinal direction of the upper connecting rod. A left upper support arm attached to a central portion so as to be pivotable about a longitudinal axis; and a biasing device for biasing the folding support arm mechanism in a rising direction, the left lower support arm and The right upper support arm, and a biasing device using a tension spring and a tension cable incorporated in at least one hollow portion of the right lower support arm and the left upper support arm, and according to the biasing device. The urging force of the foldable support arm mechanism in the rising direction and the force of the screen of the reel to fold in, the force of the folding support arm mechanism in the folding direction due to the weight of the upper connecting rod and the handle portion are balanced. It has a self-supporting function that supports the screen at an arbitrary rising height position. And features.

  The screen device of the present invention has a simple structure, can satisfy the height when the screen is unfolded, is easy to use, has a small volume, and is convenient to carry. Further, since the force received by the support arm is small when the screen is retracted, the screen can be smoothly moved up and down without causing a failure such as deformation or damage for a long time.

Front view of the screen device with the screen held in a usable stretched state FIG. 1 is a rear (rear) view of the screen device in the state of FIG. 1 is an enlarged right side view of the screen device in the state of FIG. (A) is a plan view of the screen device when the screen is extended as shown in FIGS. 1 and 2, and (b) is a partially cut-away plan view of the screen device when the screen is in the delivered state Transverse right side view of the main part of the screen device when the screen is stored (A) is a perspective view of the handle unit portion when the casing is locked, (b) is a perspective view of the handle unit portion when the lock release button is moved in the unlocking direction in (a). (A) And (b) is an exploded perspective view of a handle unit, (a) is a perspective view seen from the front side of the device, (b) is a perspective view seen from the rear side of the device. Rear view of the screen device in which the screen is in the middle of lifting or lowering (A) is a partial view of the support arm mechanism in a sufficiently raised state, (b) is a partial view of the support arm mechanism in a state before being fully folded, and (c) is in a sufficiently folded state. Of the support arm mechanism during operation Rear view of screen device with screen fully extended and extended Rear view of the left base unit partly cut away Illustration of the connection part between the upper end of the tension coil spring and the tension cable Partially cutaway rear view of screen device with support arm mechanism folded Illustration of slide connector (slip connection) Notched rear view of hinge joint when support arm mechanism is up Notched rear view of hinge joint when support arm mechanism is folded (A) is a cross-sectional view of the hinge joint, (b) is an exploded perspective view of the hinge joint. Explanatory drawing of the other structural example (Example 2) of a slide connector Explanatory drawing of still another configuration example (Example 3) of the slide connector

[Example 1]
Hereinafter, the portable screen device 1 of the 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 of a front surface, a bottom surface, and a rear surface in a cross section (FIG. 5), and the upper surface side is an opening 304 for entering and exiting the screen along the length. It is open. End caps 302 and 302 are fixed to the left and right ends of the casing 3 by appropriate means such as screws. A cylindrical reel 30 (FIG. 5) that is supported between the inner surfaces of the left and right caps 302 and 302 and that is long in the left-right direction is disposed in the casing 3. A flexible screen 2 is wound around the reel 30. The lower side (lower end) of the screen 2 is locked to the reel 30. The reel 30 is always urged to rotate in one direction by an urging device (not shown: stress device) such as a spring.

  In this embodiment, the upper side (upper end) of the screen 2 is connected to the upper connecting rod 401 provided in the support unit 4, which is a separate member from the casing 3, by the fixing plate 20 (FIG. 5). Is fixed. The rod 401 is long in the left-right direction and has a dimension that is slightly longer than the width dimension (the dimension in the left-right direction) of the screen 2. The fixed plate 20 has substantially the same length as the width of the screen 2 and is fixedly attached in the rod 401. The fixed plate 20 connects the upper side of the screen 2 to the rod 401. The upper side of the screen 2 and the rod 401, that is, the unit 4 can be connected and fixed by other methods. The handle unit 5 is disposed at the center of the rod 401, that is, the unit 4 in the longitudinal direction (the center in the left-right direction). As will be described later, the unit 5 includes a handle cover 6, a handle portion 7, a lock mechanism 80, and the like.

  On the bottom surface side of the casing 3, leg portions 303 and 303 as device seats are arranged at two portions on the left side and the right side of the casing 3. The legs 303 and 303 are used for stably mounting the device 1 on the installation surface F (FIG. 3) such as a floor surface or a desk surface. In this embodiment, the legs 303 and 303 are substantially rectangular members in a plane, and are attached to the bottom of the casing 3 so as to be rotatable at the center in the longitudinal direction.

  When the apparatus is used, the apparatus 1 is placed on the installation surface F in a state where the legs 303 are rotated in a cross with respect to the bottom surface of the casing 3 so that the longitudinal direction thereof is the front-rear direction as shown in FIG. When the device is stored, the leg portion 303 is rotated with respect to the bottom surface of the casing 3 so that the longitudinal direction thereof is the left-right direction, and the leg portion 303 is accommodated in the projection surface of the casing bottom surface, so that the device 1 is compact. Can be

  The leg portions 303 and 303 can be slidably moved in the left-right direction with respect to the bottom surface of the casing 3, and the leg portions 303 and 303 can be configured to be arbitrarily adjustable with respect to the position of the bottom surface of the casing 3 and the mutual distance. . Moreover, it can also be set as the structure which can be attached or detached with respect to the casing 3. FIG. Further, if the apparatus 1 can be stably supported with respect to the installation surface F by the casing bottom surface itself when the apparatus is used, the legs 303 and 303 can be omitted.

  A front base member 12 is provided at a substantially central portion in the longitudinal direction (left-right direction) of the front surface of the casing 3. A rear base member 13 is provided at a substantially central portion of the rear surface of the casing 3 in the longitudinal direction. The handle unit 5 disposed in the support unit 4 corresponds to the front and rear base members 12 and 13. The front base member 12 and the rear base member 13 are plastic molded products in the present embodiment, and are fixed to the casing 3 by appropriate fixing means such as screws or an adhesive.

  Base units 23L and 23R are provided on the left end side and the right end side of the rear surface of the casing, respectively. The units 23L and 23R are plastic molded products in the present embodiment, and are fixed to the casing 3 by appropriate fixing means such as screws or adhesives. On the rear surface side of the screen 2, an L-type foldable support arm mechanism 14 is disposed between the left and right base units 23 </ b> L and 23 </ b> R and the substantially central portion of the support unit 4 in the left-right direction. The mechanism 14 has a self-supporting function capable of rising and folding to hold the screen 2 in the extended state. The mechanism 14 will be described in detail later.

  FIG. 5 is a cross-sectional right side view of the main part of the device 1 in the screen storage state. In this state, the screen 2 is sufficiently wound by the rotational biasing force of the reel 30 and stored in the casing 3. The rod 401 of the unit 4 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. Further, the mechanism 14 is in a state of being folded in the projection surface on the rear surface of the casing 3. Further, the handle unit 5 is locked to the casing 3 by being locked by the front base member 12 and the rear base member 13 on the casing 3 side by a locking operation of a lock mechanism 80 described later provided therein. ). That is, the handle portion 7 is locked with respect to the casing 3. In this locked state, the handle portion 7 can be grasped and the apparatus 1 can be lifted from the installation surface F to carry the bag. 4A is a plan view of the device 1 when the screen is extended as shown in FIGS. 1 and 2, and FIG. 4B is a partially cutaway plan view of the device 1 when the screen is stored.

  When the device 1 in the screen storage state shown in FIG. 5 is used, the legs 303 and 303 are rotated to the posture in the front-rear direction. The device 1 is placed on the installation surface F at the place of use, and a lock release button (unlock operation unit) 801 described later of the lock mechanism 80 is moved in the unlock direction. Then, the lock of the handle unit 5 with respect to the front base member 12 and the rear base member 13 on the casing 3 side is released. Therefore, the handle unit 7 is grasped and the support unit 4 is pulled upward against the screen winding force of the reel 30. As the unit 4 is pulled up, the screen 2 is pulled out above the casing 3 from the opening 304 while rotating the reel 30 in the direction opposite to the winding direction. Further, the support arm mechanism 14 on the rear surface side of the screen 2 starts up (extends) from the folded state. The mechanism 14 has a self-supporting function as will be described later. That is, even if the hand is released from the handle 7 at an arbitrary rising height position within the range where the screen 2 is lifted or pulled down, the unit 4 and the weight of the screen 2 and the screen winding force of the reel 30 and the mechanism 14 will be described later. Power and both are balanced. Thereby, the screen 2 is held in a state of being stably supported at an arbitrary rising height 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 mechanism 14. FIG. 2 is a rear (rear) view of the apparatus 1 in the state of FIG. FIG. 3 is an enlarged right side view of the apparatus 1 in the state of FIG. FIG. 8 is a rear view of the screen device in a state where the screen is being pulled up or being pulled down. FIG. 10a is a rear view of the device 1 with the screen 2 pulled out to the maximum extent.

  Conversely, when returning the device 1 in the screen-expanded state to the screen storage state in FIG. 5 as shown in FIGS. 1 to 3 and 10 a, the unit 4 is moved downward by grasping the handle portion 7 of the unit 4. As a result, the screen 2 is wound around the reel 30 by the winding force of the reel 30, returns from the opening 304 into the casing 3, and is stored. Further, the mechanism 14 operates in the direction in which it is folded. When the unit 4 is sufficiently lowered and moved relative to the casing 3, the rod 401 of the unit 4 is positioned corresponding to the opening 304 on the upper surface of the casing 3 and closes the opening 304. Further, the mechanism 14 is sufficiently folded in the projection surface on the rear surface of the casing. Further, the handle unit 5 is in a state corresponding to a predetermined position on the front base member 12 and the rear base member 13 on the casing 3 side. When the unit 5 is pressed against the front base member 12 and the rear base member 13, the lock mechanism 80 is locked, and the unit 5 is engaged and locked with the front base member 12 and the rear base member 13. Become.

(Handle unit 5)
6A is a perspective view of the handle unit 5 in a locked state with respect to the casing 3, and FIG. 6B is a state in which the unlocking button 801 is moved in the unlocking direction B in FIG. FIG. 6 is a perspective view of the handle unit 5 when the lock is released. 7A and 7B are exploded perspective views of the handle unit 5. FIG. 7A is a perspective view seen from the front side of the apparatus, and FIG. 7B is a perspective view seen from the rear side of the apparatus. .

  The handle unit 5 includes a handle cover 6, a handle portion 7, a lock mechanism 80, and the like. The lock mechanism 80 includes a pair of front and rear holders 9 for attaching the lock member 8 to the cover 6 so as to be slidable in the left-right direction, screws 10 for attaching the holder 9 to the cover 6, reset springs 11 and the like. Composed.

  The handle portion 7 is attached to the cover 6 so as to be able to swing up and down on the outside of the cover 6. When not in use, the cover 6 falls down due to its own weight. When the device 1 is transported or the screen 2 is raised or lowered, the handle portion 7 is raised from the cover 6 and gripped.

  The lock member 8 is disposed through the holders 9 and 9 so as to be slidable in the left-right direction inside the cover 6. The holder 9 is fixed to the inside of the cover 6 with screws 10. An unlock button 801 provided on the upper surface of the lock member 8 is fitted into the rectangular through hole 601 in the center of the cover 6 from the inside and exposed to the outside of the cover 6. Engagement portions (hook-shaped portions) 802 are respectively provided on the front side and the rear side of the lock member 8. The front meshing portion 802 is engaged / disengaged corresponding to the meshed portion 1201 provided on the front base 12 side of the casing 3. The rear meshing portion 802 is engaged / disengaged corresponding to the meshed portion 1301 provided on the rear base 13 side of the casing 3.

  The lock member 8 is constantly urged to move to the left in the handle cover 6 by the reset spring 11. The direction in which the lock member 8 moves to the left is a direction in which the meshing portion 802 is engaged with the meshed portions 1201 and 1301. The pulling 11 is a biasing member that moves and biases the lock member 8 in a direction in which the meshing portion 802 engages with the meshed portions 1201 and 1301.

  In the free state, the button 801 is positioned so as to move to the left in the hole 601 of the cover 6 as indicated by an arrow A in FIG. This position is the lock operation position of the lock member 8, and the front and rear meshing portions 802 of the lock member 8 are meshed with the meshed portion 1201 on the front base 12 side of the casing 3 and the rear base 13, respectively. It is a position that engages with the portion 1301.

  In the locked state of the unit 5, the apparatus 1 can be pulled up and transported using the handle portion 7. 6 (a), the button 801 of the unit 5 is moved in the unlocking direction (rightward) B as shown in FIG. 6 (b). Then, the front and rear meshing portions 802 of the lock member 8 are disengaged from the meshed portions 1201 and 1301 of the front base 12 side and the rear base 13 of the casing 3, respectively, and the lock of the unit 5 on the casing 3 is released. Is done. Accordingly, the screen 2 can be pulled out (expanded) by grasping the handle portion 7 and pulling up the rod 401, that is, the support unit 4 from the casing 3.

  The assembly and structure of the handle unit 5 including the lock mechanism 80 will now be described in detail with reference to FIG. The left end portion of the spring 11 is positioned in the right semicircular groove of the lock member 8, and the button 801 of the lock member 8 is inserted into a rectangular through hole 601 in the center portion of the cover 6. The right end of the spring 11 is pushed into the right spring stopper 602 in the cover 6. One slide guide pin 901 at the center of one of the pair of front and rear holders 9 and 9 is inserted into a slide groove 803 on one side of the lock member 8. Then, the screws 10 that pass through the pair of through holes 902 on the left and right sides of the holder 9 are twisted into the pair of left and right screw holes 603 on the inside of the cover 6. Then, the slide guide pin 901 at the center of the other holder 9 is inserted into the slide groove 803 on the other side of the lock member 8. Then, the screws 10 that pass through the pair of through holes 902 on the left and right ends of the holder 9 are screwed into the corresponding screw holes 603 on the inside of the cover 6.

  Thereby, the lock member 8 is disposed inside the cover 6 so as to be slidable in the left-right direction via the holders 9 and 9. The lock member 8 is constantly urged to move in the left direction A (FIG. 6A), which is the lock direction, inside the cover 6 by the spring 11. The lock member 8 can be moved and operated in the right direction B (FIG. 6B), which is the unlocking direction, against the tension force of the spring 11 by the button 801. There are arch-shaped notches 604 on the left and right sides of the cover 6. The notched portion 604 is fitted with shaft portions provided inwardly at both left and right ends of the handle portion 7 so that the handle portion 7 is rotatably supported with respect to the cover 6. And the cover 6 is being fixed with respect to the center part of the longitudinal direction of the rod 401, ie, the support unit 4, with the bis | screw (not shown).

  As described above, when the screen 2 is changed from the extended state (FIGS. 1 to 3 and FIG. 10A) to the retracted state (FIG. 5), the handle unit 5 is pushed down. As a result, the reel 30 winds the screen 2 and is housed in the casing 3, and the unit 4 faces downward and is positioned facing the front base 12 and the rear base 13 of the casing 3. Then, the engagement portion 802 on the front side of the lock member 8 on the unit 5 side is inserted into the engagement portion 1201 of the front base 12, and the engagement portion 802 on the rear side of the lock member 8 is inserted into the engagement portion 802 of the rear base 13. It is inserted into the meshing part 1301. Then, when the unit 5 is continuously pushed down, the meshing portion 802 presses against the meshed portions 1201 and 1301, and the lock member 8 moves from the left side to the right side in the cover 6 while compressing the spring 11. 802 fits into the engaged portions 1201 and 1301.

  When fully engaged, the engagement portion 802 is not pressed against the engaged portions 1201 and 1301, and the lock member 8 moves back from the right side to the left side by the compression reaction force of the spring 11. As a result, the engaging portion 802 is engaged with the engaged portions 1201 and 1301, and the cover 6 is locked with respect to the casing 3.

  Conversely, when the screen 2 is moved from the retracted state (FIG. 5) to the extended state (FIGS. 1 to 3 and FIG. 10a), the button 801 of the unit 5 in the device 1 in the locked state of FIG. As in (b) of FIG. 6, the moving operation is performed in the unlocking direction B (rightward). Then, the spring 11 is compressed, the lock member 8 moves from the left side to the right side in the cover 6, and the meshing portion 802 moves sufficiently away from the meshed portions 1201 and 1301. When force is applied and the handle portion 7 is pulled up, the lock member 8 is separated from the front base 12 and the rear base 13 and the lock of the unit 5 on the casing 3 is released. In this unlocked state, the lock member 8 returns from the right side to the left side (reset movement) by the compression reaction force of the spring 11.

(L-shaped folding support arm mechanism 14)
The mechanism 14 is disposed between the left and right base units 23 </ b> L and 23 </ b> R and the substantially central portion of the support unit 4 in the longitudinal direction on the rear surface side of the screen 2. The mechanism 14 is a screen support mechanism that can stand up and fold, and has a self-supporting function for holding the screen 2 in a stretched state.

  The mechanism 14 of this embodiment has a left lower support arm 22L whose lower end is hinged to the left base unit 23L so as to be pivotable about a longitudinal axis 23a. Further, the lower end support portion 22R has a lower right support arm 22R hinged so as to be rotatable about a shaft 23a in the front-rear direction with respect to the right base unit 23R. Further, the upper end portion is hinge-coupled to the cover 6 so as to be rotatable around a shaft 6a in the front-rear direction, and the lower end portion is rotatably coupled by the upper end portion of the left lower support arm 22L and the right hinge joint portion 15R. Right upper support arm 21R.

  Further, the upper end portion is hinge-coupled to the cover 6 so as to be pivotable about the longitudinal axis 6a, and the lower end portion is pivotally coupled to the upper end portion of the right lower support arm 22R and the left hinge joint portion 15L. Left upper support arm 21L.

  When C is a vertical line (virtual line) in the center of the screen 2 in the width direction (left-right direction), the center in the left-right direction of the cover 6 and the center in the left-right direction of the front base 12 and the rear base 13 are vertical. It is almost located on line C. Further, the left and right base units 23L and 23R are substantially symmetrical with respect to the vertical line C.

  The left lower support arm 22L, the right lower support arm 22R, the left upper support arm 21L, and the right upper support arm 21R are each a rigid rod-like member. For example, a metal pipe material having a cross-sectional cylindrical shape or a cylindrical shape is used. Can be used. In the present embodiment, the left lower support arm 22L and the right lower support arm 22R are each approximately the same length as the width of the screen 2. Also, the left upper support arm 21L and the right upper support arm 21R are each approximately the same length as half the width of the screen 2. The upper ends of the left upper support arm 21L and the right upper support arm 21R are hinged to the handle cover 6 so as to be pivotable at a substantially central portion (on the vertical line C) in the left-right direction of the handle cover 6. Alternatively, the upper end of the arm 21L is slightly on the left side of the center portion in the left-right direction of the cover 6, and the upper end portion of the arm 21R is on the right side of the center portion in the left-right direction of the cover 6 with the vertical line C in the middle. It is hinge-joined so as to be rotatable with respect to the cover 6 at a symmetrical position.

  Accordingly, the left lower support arm 22L and the right upper support arm 21L, and the right lower support arm 22R and the left upper support arm 21L are substantially symmetrically arranged with respect to the vertical line C. The left lower support arm 22L and the right lower support arm 22R cross each other on the vertical line C (cross: FIGS. 2 and 10a) when the mechanism 14 is in the rising state (in the extended state). Further, the left hinge joint 15L and the left upper support arm 21L are always on the left side of the vertical line C of the screen 2 when the mechanism 14 is in the standing state (FIGS. 1 to 3, 10a) and in the folded state (FIG. 5). Exists. The right hinge joint 15R and the right upper support arm 21R are always present on the right side of the vertical line C of the screen 2. With this structure, an L-type foldable support arm mechanism 14 capable of rising operation and folding operation is configured.

  As described above, when approaching the central portion of the support unit 4 in the longitudinal direction (left-right direction), the upper ends of the left and right upper support arms 21L and 21R are respectively connected to the unit 4 with the longitudinal axis 6a. It is pivotally connected to the center. Thereby, the vertical movement of the screen 2 can be performed more stably and smoothly. The upper end of the arm 21L is slightly left of the center in the longitudinal direction of the cover 6 and the upper end of the arm 21R is slightly to the right of the center of the cover 6 in the longitudinal direction. It is also possible to connect the cover 6 so as to be pivotable about the shaft 6a at a certain position.

  Further, at the rear surface side of the casing 3, the lower end portions of the left and right lower support arms 22 </ b> L and 22 </ b> R are connected so as to be rotatable about the shaft 23 a when approaching the left and right ends of the casing 3. Thereby, the vertical movement of the screen 2 can be performed more stably and smoothly. If necessary, the lower end portions of the left and right lower support arms 22L and 22R are connected so as to be rotatable about the longitudinal axis 23a at a position slightly closer to the center in the longitudinal direction on the rear surface side of the casing 3. You can also.

  This will be described in more detail as follows. The upper end portions of the upper support arms 21L and 21R can be rotated at the center portion in the longitudinal direction of the unit 4 with the upper end portions of the left and right upper support arms 21L and 21R overlapping in the left-right direction. Enable connection. The central portion of the unit 4 in the longitudinal direction may be a little closer to the central portion apart from both ends. In addition, the lower support arms 22L and 22R on the left and right sides can be pivotably connected to the lower end portions of the lower support arms 22L and 22R at the left and right ends of the rear surface of the casing 3 in a state where the front and rear positions do not overlap in the left and right direction. Like that. The left and right end portions of the rear surface of the casing 3 may be slightly away from the both ends and slightly closer to the center portion. The following measures will be taken for the above configuration.

  That is, reinforcing hinge joints 15L and 15R that can be fitted from the outside are employed. Thereby, on the same side, the lower end portion of the left upper support arm 21L and the upper end portion of the right lower support arm 22R are connected to each other by the hinge joint portion 15L. On the same side, the lower end portion of the right upper support arm 21R and the upper end portion of the left lower support arm 22R are connected to each other at the hinge joint portion 15R. That is, the upper support arms 21L and 21R on the left and right sides and the lower support arms 22L and 22R on the left and right sides are connected by the two hinge joints 15L and 15L. As a result, an L-type foldable support arm mechanism 14 that can be raised and folded is configured.

  When the mechanism 14 is in the folded state (FIG. 5) and in the standing state (FIGS. 1 to 3, 10a), the screw 18 and the nut 19 (FIG. 15), which are the pivot centers of the right hinge joint 15R, are far to the right ( It is located on the right side of the vertical line C of the screen 2. In addition, the screw 18 and the nut 19 that are the rotation center of the left hinge joint 15L are located on the far left side (left side of the vertical line C of the screen 2). In the standing state of the mechanism 14, the left and right lower support arms 22L and 22R cross each other (FIG. 2), and the two left and right hinge joints 15L and 15R do not overlap in the front-rear direction. To that end, the mechanism 14 is set from the clean storage state in which the screen 2 is stored in the casing 3 to the maximum clean stretched state (FIG. 10a). Since the hinge joints 15L and 15R that are fitted into the arms 21 and 22 from the outside and have a diameter larger than that of the arm do not cross, the positions of the arms 21 and 22 in the support arm mechanism 14 can approach in the front-rear direction. And the rotation range of hinge junction part 15L * 15R can be controlled, and durability can also be improved.

  As shown in FIG. 15, the hinge joints 15L and 15R have cylindrical upper hinge units 16 that are inserted into the lower ends of the upper support arms 21L and 21R. Moreover, it has the cylindrical hinge unit 17 inserted in the upper end part of the above-mentioned lower support arms 22L and 22R. Moreover, it has the screw | thread 18 and the nut 19 which connect the above-mentioned upper side hinge unit 16 and the lower side hinge unit 17 so that it can rotate freely. 15A is a cross-sectional view of the hinge joint 15 (LR), and FIG. 15B is an exploded perspective view of the hinge joint 15 (LR). However, it may be configured in other formats.

  FIG. 11 is a partially cutaway rear view of the screen device with the mechanism 14 folded. As shown in FIG. 11, when the mechanism 14 is folded, the hinge joint 15L that connects the upper support arm 21L on the left side and the lower support arm 22R on the right side with the mechanism 14 standing up (FIG. 2). Is located at the left end. At the same time, the hinge joint 15R that connects the upper support arm 21R on the right side and the lower support arm 22L on the left side with the mechanism 14 standing up is located at the right end. As described above, the lengths of the arms 21 and 22 are set. By doing so, when the support arm mechanism 14 is folded, the support arm mechanism 14 extends in the left-right direction, but does not come out from both the left and right sides of the screen 2 and the moving stroke of the screen 2 in the up-down direction becomes longer, and the arms 21 and 22 are extended. The length of is also shortened. Although the casing 3 becomes longer in the longitudinal direction, the casing 3 may be extended from the hinge joints 15L and 15R to the left and right sides of the screen 2.

  In the state in which the mechanism 14 is folded (FIGS. 5 and 11), the left and right lower support arms 22L and 22R and the left and right upper support arms 21L and 21R are folded substantially horizontally so that the casing 3 It is in a state of being accommodated in the rear projection plane. In this state, the left hinge joint 15L is located in the left base unit 23L and the right hinge joint 15R is located in the right base unit 23R. . In addition, the downward surfaces of the substantially central portions of the lower support arms 22L and 22R on the left and right sides that have been rotated substantially horizontally are received and supported by the holders 1302 provided on the rear base 13, respectively. Weight support of mechanism 14: FIGS. 5, 7B, 9C, and 11. FIG. Note that the holder 1302 can be omitted.

  The left lower support arm 22L and the right lower support arm 22R are connected (slip connected) by a slide connector 27 in order to hold the arms 22L and 22R in a pulled state. This will be described with reference to FIG.

  The left lower support arm 22L and the right lower support arm 22R are respectively provided with annular first sliders 28 and second sliders 29 that are fitted on the arms. The first slider 28 is slidable along the arm 22L. The second slider 29 is freely slidable along the arm 22R. The head 2801 of the first slider 28 is fitted into the groove 2901 of the second slider 29, and the groove edge 2902 of the second slider 29 sandwiches the head 2801 of the first slider 28, so that the first slider 28 and the second slider 28 The slider 29 is connected to each other. The head 2801 can rotate in the groove 2901. Thus, the first slider 28 and the second slider 29 are connected to each other so as to be rotatable around the neck (shaft) 2802 of the head 2801. That is, the left and right lower support arms 22L and 22R are connected via the slide connector 27 and cannot be separated. In this way, using the slide connector 27, the lower support arms 22L and 22R on the left and right sides are connected so that they can freely rotate. When the screen 2 is converted from the extended state to the retracted state by the slide connector 27, the lower support arms 22L and 22R (mechanism 14) on both the left and right sides are substantially left and right with the vertical line C as the axis of symmetry at an arbitrary rising height position. It is kept symmetrical. Conversely, when the screen 2 is converted from the retracted state to the extended state, the left and right lower support arms 22L and 22R (mechanism 14) are substantially symmetrical with respect to the vertical line C as the symmetry axis at an arbitrary rising height position. Is maintained in the state. Thereby, the start-up operation / folding operation of the mechanism 14 is always stably performed. The first slider 28 may be provided with a groove 2901 and the second slider 29 may be provided with a head 2801.

  FIG. 13 is a rear view of the right hinge joint when the mechanism 14 is standing up, and FIG. 14 is a rear view of the right hinge joint when the mechanism 14 is folded. The left hinge joint has the same configuration. As shown in FIGS. 13 and 14, the upper hinge unit 16 of the hinge joint 15 (L · R) is provided with an opening position limiting convex portion 1602, and the lower hinge unit 17 has an opening position limiting. Support unit 1702 is provided. The upper hinge unit 16 and the lower hinge unit 17 rotate around the screw 18 that is the hinge joint center (hinge joint rotation center) in the opening direction, and the opening position restriction convex portion 1602 is used for opening position restriction. The support unit 1702 is hit. As a result, the hinge joint 15 stops rotating. That is, further rotation of the hinge joint 15 in the opening direction is prevented. At this time, the inner angle between the lower support arms 22L and 22R on the left and right sides of the mechanism 14 and the upper support arms 21L and 21R on the left and right sides becomes the maximum value. Then, the further rising operation of the mechanism 14 is blocked, and the screen 2 is pulled out to the maximum extent and extended (FIG. 10a).

  The above-described restriction points 1602 and 1702 are not limited to the positions shown in FIGS. The positions of the opening position restricting convex portion 1602 and the opening position restricting support unit 1702 are set as required. Accordingly, different restriction points 1602 and 1702 when the inner angle between the lower support arms 22L and 22R on the left and right sides of the mechanism 14 and the upper support arms 21L and 21R on the left and right sides are 180 degrees or less are arbitrarily set. Can do.

  Since the restriction points 1602 and 1702 are provided at the left and right hinge joints 15L and 15R, the maximum drawer use state (FIG. 10a) of the screen 2 can be stably restricted. However, the restriction points 1602 and 1702 can be installed at one of the left and right hinge joints 15L and 15R. Further, the opening position restricting convex portion 1602 may be disposed on the lower hinge unit 17 side, and the position restricting support unit 1702 may be disposed on the side hinge unit 16 side.

  When the screen 2 is changed from the extended state (FIGS. 1 to 3 and 10a) to the stored state (FIGS. 5 and 11), the mechanism 14 is folded by pushing down the handle unit 5, and the screen 2 is wound on a reel 30 in the casing 3. FIG. 9A is a partial view of the mechanism 14 in a fully upright state, FIG. 9B is a partial view of the mechanism 14 in a state before being fully folded, and FIG. 9C is a fully folded state. It is a fragmentary view of 14 mechanism at the time.

  Next, the self-supporting function mechanism of the mechanism 14 will be described with reference to FIGS. 10a to 10c, FIGS. 11, 13, 14, and 15. FIG. FIG. 10b is a partially cutaway rear view of the left base unit portion, and FIG. 10c is a view of the connection portion between the upper end portion of the tension coil spring and the tension cable. In the present embodiment, urging devices (stress devices) for starting up and urging as a self-supporting function mechanism of the mechanism 14 are incorporated in the hollow portions of the lower support arms 22L and 22R on the left and right sides, respectively. Since the biasing devices built in the hollow portions of the left lower support arm 22L and the right lower support arm 22R are symmetrical and have the same mechanism, the biasing device of the left lower support arm 22L will be mainly described as a representative.

  Inside the lower end portion of the arm 22L, a spring fixing component 25 that is rotatable about a shaft 23a that is the rotation center of the arm 22L is disposed. A tension coil spring 24 is inserted into the arm 22L, and the lower end portion of the spring 24 is connected to the fixed component 25. That is, the lower end portion of the spring 24 is connected to the arm 22L. One end of a flexible tension cable (tension wire) 26 is connected to the upper end of the spring 24 via a cable grip (cable grip) 2601. The other end of the cable 26 is extended to reach the end of the upper hinge unit 16 via the cable guide groove 1701 of the lower hinge unit 17 of the hinge joint 15R and the U-shaped cable guide groove 1601 of the upper hinge unit 16. . The stopper 2602 is locked to the upper hinge unit 16. That is, it is connected to the arm 21R. The spring 24 always tensions the cable 26 with a predetermined pulling force. The urging device on the right lower support arm 22R side has the same structure as the urging device on the left lower support arm 22L.

  With this structure, the right upper support arm 21R is always urged to rotate in the opening direction about the right hinge joint 15R by the tension of the cable 26 due to the pulling force of the spring 24 with respect to the left lower support arm 22L. The above opening direction is a direction in which the inner angles of the arms 21R and 22L are increased. The above opening direction is a direction in which the inner angles of the arms 21R and 22L are increased. Further, the left upper support arm 21L is always urged to rotate in the opening direction around the left hinge joint 15L by the tension of the cable 26 due to the pulling force of the spring 24 with respect to the right lower support arm 22R. The opening direction is a direction in which the inner angles of the arms 21L and 22R are increased. That is, the mechanism 14 is always urged in the rising direction by the tension of the cable 26 due to the pulling force of the spring 24.

  Even if the mechanism 14 is released from the handle portion 7 at an arbitrary rising height position within the range in which the screen 2 is lifted or pulled down, the mechanism 14 is maintained in a state of being stably supported at that height position (self-standing function). That is, both the weight of the unit 4 and the screen 2 and the screen winding force of the reel 30 and the rising force by the urging devices 24 and 26 of the mechanism 14 are balanced. Therefore, the screen 2 is held in a state where it is stably supported at an arbitrary rising height position.

  As shown in FIGS. 13 and 14, there is a pulling guide groove 1601 through which the cable 26 passes on the hinge joint 15 </ b> R (15 </ b> L). The groove 1601 is a U-shaped eccentric groove. The pulling guide groove 1601 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 24 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 24 is different with the change in the opening angle of the hinge joints 15L and 15R in the rising operation and folding operation of the mechanism 14, the generated tension is different. However, in practice, the screen 2 can be arbitrarily selected by combining the force of the spring 24, the frictional force of the hinges at the hinge joints 15L and 15R, the weight of the screen of the lower support arm and the recovery force of the screen. It can be held at a high height position. In addition, the semicircular groove a portion of the pulling guide groove 1601 through which the cable 26 is passed over the hinge joints 15L and 15R 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 FIGS. 15A and 15B, the hinge joint 15 (LR) can freely connect the upper hinge unit 16, the lower hinge unit 17, and the upper hinge unit 16 and the lower hinge unit 17. The screw 18 and the nut 19 are connected so as to be rotatable. A screw 18 passes through the sleeve 33 and the gasket 32. A pair of friction plates 31 and 31 are provided between the connection surfaces of the hinge joint 15 (L / R). The hinge joint 15 and the friction plate 31 are connected using the screw 18 and the nut 18. Pulling guide grooves 1601 and 1701 through which the cable 26 passes are provided on the hinge joint 15. The upper hinge unit 16 is provided with a U-shaped cable guide groove 1601. The lower hinge unit 17 is provided with a cable guide groove 1701. The cable 26 passes through the U-shaped cable guide groove 1601 of the upper hinge unit 16 and the cable guide groove 1701 of the lower hinge unit 17.

  Here, in addition to the above-described attachment state, the following attachment form may be adopted. That is, one end of the spring 24 is attached to the upper support arm 21 (LR) by a spring fixing part 25, and the other end is connected to the lower part via the cable 26 via the hinge joint 15 (LR). It is also possible to use a form connected to the support arm 22. Alternatively, other attachment methods can be employed. Further, the urging devices 24 and 26 for urging the mechanism 14 in the raising direction are provided only on one side of the left lower support arm 22L and the right upper support arm 21R, and the right lower support arm 22R and the left upper support arm 21L. It is also possible to have an arrangement.

[Example 2]
FIG. 16 shows another configuration example of the slide connector 27 in the device 1 of the first embodiment. The slide connector 27 </ b> A according to the second embodiment is a magnetic device including an iron block 34 and a magnet 35. Grooves are formed along the length of the opposing surfaces of the left lower support arm 22L and the right lower support arm 22R. An iron piece 34 is slidably fitted along the groove in the groove of the left lower support arm 22L. The iron piece 34 is disposed so as not to be detached from the groove. A magnet 35 is fitted into the groove of the right lower support arm 22R so as to be slidable along the groove. The magnet 35 is also arranged so as not to be removed from the groove. And the iron piece 34 and the magnet 35 are adsorb | sucked by magnetic force, and it mutually connects and is connected so that rotation is possible. That is, the lower support arms 22L and 22R on the left and right sides are connected via the iron connector 34 and the slide connector 27A made of the magnet 35, and cannot be separated. In this manner, the lower support arms 22L and 22R on the left and right sides are connected to each other so as to freely rotate using the slide connector 27A including the iron piece 34 and the magnet 35.

  Also with this slide connector 27A, when the screen 2 is converted from the extended state to the retracted state, the lower support arms 22L and 22R (mechanism 14) on both the left and right sides are left and right with the vertical line C as the symmetry axis at an arbitrary rising height position. It is kept in a nearly symmetrical state. Conversely, when the screen 2 is converted from the retracted state to the extended state, the left and right lower support arms 22L and 22R (mechanism 14) are substantially symmetrical with respect to the vertical line C as the symmetry axis at an arbitrary rising height position. Is maintained in the state. Thereby, operation | movement of the support arm mechanism 14 is always performed stably.

[Example 3]
FIG. 17 shows still another configuration example of the slide connector 27 in the device 1 of the first embodiment. The slide connector 27B of the third embodiment uses a sliding shaft 36. Grooves are formed along the length of the opposing surfaces of the left lower support arm 22L and the right lower support arm 22R. Heads 3601 and 3061 are provided at both ends of the sliding shaft 36, respectively. One head 3601 of the shaft 36 is fitted into the groove of the left lower support arm 22L, and the other head 3601 is fitted into the groove of the left lower support arm 22L. The edge of the groove sandwiches the head 3601 at both ends, and the head 3601 does not come off the groove. The head 3601 can slide freely along the longitudinal direction of the support arm in the groove. That is, the lower support arms 22L and 22R on both the left and right sides are connected via the slide connector 27B by the sliding shaft 36 and cannot be separated. In this manner, the lower support arms 22L and 22R on the left and right sides are connected to each other so as to freely rotate using the slide connector 27B formed by the sliding shaft 36.

  Also with this slide connector 27B, when the screen 2 is converted from the extended state to the retracted state, the lower support arms 22L and 22R (mechanism 14) on both the left and right sides are left and right with the vertical line C as the axis of symmetry at an arbitrary rising height position. It is kept in a nearly symmetrical state. Conversely, when the screen 2 is converted from the retracted state to the extended state, the left and right lower support arms 22L and 22R (mechanism 14) are substantially symmetrical with respect to the vertical line C as the symmetry axis at an arbitrary rising height position. Is maintained in the state. Thereby, operation | movement of the support arm mechanism 14 is always performed stably.

  The configuration of the screen device 1 according to the first to third embodiments is summarized as follows.

  (1) It has a casing 3 that is long in the left-right direction when the screen device 1 is viewed from the front side, and whose upper surface side is open as an opening 301 for entering and exiting the screen along the length. The reel 30 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 is locked to the reel 30 and has a flexible screen 2 wound around the reel 30. It has an upper connecting rod 401 corresponding to the opening 301 that is long in the left-right direction and engages the upper end of the screen 2. The rod 401 has a handle portion 7 disposed at the center in the left-right direction. On the rear surface side of the screen 2, there is a folding support arm mechanism 14 disposed between the casing 3 and the rod 401.

  The mechanism 14 includes a left lower support arm 22L attached to a lower end portion of the casing 3 so that a lower end portion thereof is pivotable about a shaft 23a in the front-rear direction. Moreover, it has the lower right support arm 22R with which the lower end part was attached so that rotation about the axis | shaft 23a of the front-back direction with respect to the right side edge part part of the casing 3 was possible. Also, the lower end of the left lower support arm 22L is pivotably coupled to the upper end of the left lower support arm 15R via the right hinge joint 15R, and the upper end is centered on the longitudinal axis 23a at the center of the rod 401 in the left-right direction. The upper right support arm 21R is rotatably attached to the right side. Further, the lower end of the right lower support arm 22R is pivotably coupled to the upper end of the right lower support arm 22R via the left hinge joint 15L, and the upper end is centered on the longitudinal axis 6a at the longitudinal center of the rod 401. The left upper support arm 21L is rotatably attached to the left side.

  An urging device that urges the mechanism 14 in the starting direction is provided. The urging device uses a left lower support arm 22L and a right upper support arm 21R, and a tension spring 24 and a tension cable 26 incorporated in at least one hollow portion of the right lower support arm 22R and the left upper support arm 21L. .

  The screen 2 can be arbitrarily selected by balancing the urging force of the mechanism 14 by the urging device with the screen winding force of the reel 30 and the force of the rod 14 or the handle portion 7 in the folding direction of the mechanism 14. It has a self-supporting function to support at the rising height position.

  (2) The tension spring 24 is built in the hollow portion of the left lower support arm 22L. The lower end of the spring 24 is connected to the left lower support arm 22L, and one end of the tension cable 26 is connected to the upper end of the spring 24. The other end of the cable 26 is connected to the right upper support arm 21R via the right hinge joint 15R.

  Further, the tension spring 24 is built in the hollow portion of the right lower support arm 22R. The lower end of the spring 24 is connected to the lower right support arm 22R, and one end of the tension cable 26 is connected to the upper end of the spring 24. The other end of the cable 26 is connected to the left upper support arm 21L via the left hinge joint 15L.

  (3) The left lower support arm 22L and the right lower support arm 22R each have substantially the same length as the width of the screen 2. The left upper support arm 21 </ b> L and the right upper support arm 21 </ b> R are each approximately the same length as half the width of the screen 2.

  (4) The left lower support arm 22L and the right lower support arm 22R, and the right upper support arm 21R and the left upper support arm 21L are arranged substantially symmetrically with respect to the vertical line C at the center in the horizontal direction of the screen 2. There is a relationship.

  The left upper support arm 21L and the right upper support arm 21R intersect each other on the vertical line C when the mechanism 14 is in the rising state.

  The right hinge joint 15R and the right upper support arm 21R are always present on the right side of the vertical line C, and the left hinge joint 15L and the left upper support arm 21L are both on the vertical line C, both in the standing state and in the folded state of the mechanism 14. Is always on the left side.

  (5) It has a slide connector 27 that connects the left lower support arm 22L and the right lower support arm 22R so as not to be separated at a crossing portion and so as to be freely rotatable with respect to each other. The slide connector 27 has a slide connector that slides along the longitudinal direction to the left lower support arm 22L and the right lower support arm 22R as the mechanism 14 rises and folds.

  (6) The slide connector 27 includes a first slider 28 and a second slider 29 that are fitted to the left lower support arm 22L and the right lower support arm 22R so as to be slidable along the length thereof. One of the first slider 28 and the second slider 29 has a groove 2901 and the other has a head 2801. The head 2801 is connected to the slider by a shaft portion 2802 and is housed in the groove of the slider on the side where the groove 2901 is provided. The edge 2902 of the groove 2901 protrudes and holds the head 2801. As a result, the first slider 28 and the second slider 29 are coupled so as to be relatively rotatable about the shaft portion 2802.

  (7) Each of the left hinge joint portion 15L and the right hinge joint portion 15R has a pull guide groove 1601 for hanging the tension cable 26 around. The tension guide groove 1601 is a U-shaped eccentric groove constituted by a semicircular groove a and a straight groove b, and the distance from the groove bottom surface of the straight groove b to the hinge joint center 18 is hinged from the groove bottom surface of the semicircular groove a. The distance to the center 8 is shorter.

  (8) The left hinge joint 15L and the right hinge joint 15R are constituted by two parts, an upper hinge unit 16 and a lower hinge unit 17, respectively. The upper hinge unit 16 and the lower hinge unit 17 have pulling guide grooves 1601 and 1701 for hanging the tension cable 26 respectively.

  (9) A restricting convex portion 1602 and a restricting support unit that define a rising upper limit height of the mechanism 14 at the upper hinge unit 16 and the lower hinge unit 17 of at least one of the left hinge joint portion 15L and the right hinge joint portion 15R. 1702 is provided.

  (10) The friction plate 31 is provided between the connection surfaces of the upper hinge unit 17 and the lower hinge unit 17, and the upper hinge unit 16, the lower hinge unit 17, and the friction plate 31 are connected by the screw 18 and the nut 19. .

  (11) A meshing portion 802 is provided on the handle portion 7 side. There are meshed portions 1201 and 1301 corresponding to the meshing portions 802 on the casing 3 side. The handle portion 7 side is locked to the casing 3 side by the engagement between the meshing portion 802 and the meshed portions 1201 and 1301.

  (12) It has the lock mechanism 80 which can lock the engagement between the meshing portion 802 and the meshed portions 1201 and 1301 and release the lock state.

  (13) The handle portion 7 is on the handle cover 6, the handle cover 6 is attached on the rod 401, and the lock mechanism 80 is disposed on the handle cover 6.

  (14) The lock mechanism 80 is provided on the handle cover 6 so as to be slidable, and has a lock member 8 having a meshing portion 802. Further, the lock member 8 is provided on the lock member 8 for urging and moving the lock member 8 in a direction in which the meshing portion 802 is engaged with the meshed portions 1201 and 1301. And an unlocking operation portion 801 exposed to the surface.

  The screen device 1 of the present embodiment described above stabilizes the screen 2 by the rising and folding operations of the mechanism 14 in the use state in which the screen 2 is lifted (standing) or in the storage state in which the screen is pushed down. Can be supported.

  Since the urging devices (stress devices) 24 and 26 for urging the mechanism 14 in the starting direction are built in the arms 22L and 22R, the appearance is also beautiful.

  The cable 26 turns around the guide grooves a and b of the hinge joint portions 15L and 15R, and applies tension to the support arms 21L and 22R. The guide grooves a and b are not a normal guide groove type. The guide grooves a and b increase the shaft diameter in the opened state of the screen 2 and provide a sufficient force to the support arm. Moreover, when the screen 2 is stored, the shaft diameter is shortened to remove unnecessary force. Therefore, the smaller the inner angle of the L-type folding support arm, as in a normal guide groove, the longer the spring is pulled, and when it is folded at approximately 0 degrees, a strong tension is generated and the arm is deformed and increased. It will not cause problems.

  Moreover, the upper end hinges 6a and 6a of the mechanism 14 are connected to the handle cover 6 of the handle unit 5 at the substantially central portion in the longitudinal direction of the support unit 4 having the rod 401, and the lock member 8 is also provided on the handle cover 6. . Thereby, in the screen storage state, the screen 2 can be locked and the upward elasticity from the mechanism 14 can be offset.

  As compared with the case where the upper end hinge portions 6a and 6a of the mechanism 14 are provided at the left and right end portions of the rod 401 in the width direction of the screen 2, the tension of the screen 2 is too large, and the problem of the rod 401 being distorted is solved. Can do.

  In addition, when the cross-sectional area of the arms 21 (L · R) and 22 (L · R) is increased or when the deformation is removed by other structures, the cost can be saved and the volume of the apparatus can be reduced. have.

  By setting screen opening position limit points 1602 and 1702 in at least one of the hinge joints 15 (L and R) on both the left and right sides, when the limit points are used to open the screen 2, the left and right sides The support arm extends. After the hinge joint 15 (L / R) rotates to a specified angle, the restricting convex portion 1602 of the upper hinge unit 16 hits the restricting support unit 1702 of the lower hinge unit 17, and that of the mechanism 14. Stop the above rising operation. This establishes the maximum opening height of the screen. Since the restriction points 1602 and 1702 are located in the hinge joint 15 (LR), the appearance is beautiful, and it is not necessary to design a restriction unit separately. The objectives can be achieved without increasing the quantity of parts, so it has advantages in manufacturing and parts control.

  Slide connectors 27 (27A and 27B) are provided on the left and right lower support arms 22L and 22R, and the left and right support arms are connected. Thus, since the support arms 22L and 22R are not separated in the front-rear direction, even when the screen 2 is in use or in the state change operation process, the occurrence of problems such as distortion, deformation and damage of the screen 2 is reduced, and the device 1 is It can be used stably for a long time.

  In addition, by using the connected slide connectors 27 (27A and 27B), the left and right support arms can be operated with a fixed designated operation by swinging the left and right arms at the same swing angle. In addition, since the left and right support arms can be stably expanded and contracted in a unified operating state, it is a simplified and stable solution.

  The lock member 8 of the lock mechanism 80 is attached in the handle unit 5. The handle unit 5 is attached to the support unit 4 of the rod 401. When the handle cover 6 is pushed down, the meshing portion 802 of the lock member 8 meshes with the meshed portions 1201 and 1301 on the casing 3 side. Thereby, the handle unit 5 is locked to the casing 3 side. If the handle part 7 is pulled up, the apparatus 1 can be transported. When the lock release button 801 is operated in the horizontal width direction of the screen 2, the lock is released, and the screen 2 is expanded by pulling up the handle portion 7. This design has advantages such as convenience, ease of use, and high speed because the screen can be used and stored in a short time.

  Here, in the screen device of Patent Document 1. The L-type foldable support arm is provided with a unit for applying pressure to fold and repel the L-type foldable support arm. The two L-type folding support arms are fixed to the center of the screen in the left-right direction, and the support unit of the upper connecting rod connected to the other end of the screen is on the back of the casing (outer shell). Connect with base unit hinge. The hinge joint part of the left L-type folding support arm in the left-right direction of the screen is installed on the right side of the center part in the left-right direction of the support unit of the upper connecting rod. At the same time, the hinge joint portion of the L-shaped folding support arm on the right side in the left-right direction of the screen is installed on the left side of the center portion in the left-right direction of the support unit of the upper connecting rod. Thus, the upper end hinge of the upper support arm of the L-shaped folding support arm on the left side is connected to the left side of the support unit of the upper connecting rod. The upper hinge of the upper support arm of the L-shaped folding support arm on the right side is connected to the right side of the support unit of the upper connecting rod. The mounting positions of the upper support arm and the lower support arm can effectively satisfy the length of the arm required for the height when the screen is unfolded.

  However, when the screen is fully stowed, the center part of the support unit of the upper connecting rod is locked at the center part of the outer shell, and the L-type folding support arms on the left and right sides maintain upward elasticity by the biasing device. ing. It jumps up because both ends of the support unit of the upper connecting rod are receiving force. Increasing the thickness of the support unit of the upper connecting rod can increase the strength, but increases cost and weight.

  The present invention proposes the following solutions for the above problems. A pair of foldable elastic support arms 22L / 21R, 22R / 21L is employed to provide upward support force, and the spring 24 is employed as a biasing device (stress device). When the screen 2 is fully stored in the casing 3, the support unit 4 of the rod 401 is positioned corresponding to the opening 301 of the casing 3. In addition, a lock mechanism 80 is provided at the longitudinal center of the casing 3. The central portion of the support unit 4 of the rod 401 is locked at the central portion of the casing 3. The upper ends of the pair of folding elastic support arms 22L and 21R and 22R and 21L are connected to the handle cover 6 at the center of the rod 401. Due to the pulling force of the spring 24, the folding elastic support arms 22L and 21R and 22R and 21L retain the upward elasticity as they are. However, since the handle cover 6 is locked to the casing 3, the 22L / 21R and 22R / 21L elasticity of the support arm acts on the handle cover 6. Therefore, the rod 401 is locked and is not affected by elasticity, does not jump up, and does not affect the appearance of the product.

  The screen device 1 according to the present invention includes assembly parts such as a casing 3, an L-type folding support arm mechanism 14, a screen 2, an upper connecting rod 401, and a reel 30. One end of the screen 2 is connected to the rod 401, and the other end is attached by winding on the reel using the elasticity of the reel 30. The reel 30 is used to wind the screen 2 and is mounted in the casing 3 while being urged to rotate in one direction. The L-type foldable support arm mechanism 14 is connected to the upper support arms 21L and 21R and the lower support arms 22L and 22R using the hinge joints 15L and 15R, respectively. The hinge joint portions 15L and 15R are located at a position approximately 2/3 away from the lower end in the vertical direction of the mechanism 14. Pulling guide grooves 1601 and 1701 are provided in the hinge joint portions 15L and 15R. One end of the spring 24 is connected to the lower support arms 22L and 22R, and the cable 26 is connected to the other end. The cable 26 rotates around the tension guide groove of the hinge joints 15L and 15R and is connected to the upper support arms 21L and 21R. The action of the spring 24 and the pulling guide groove 1601 eliminates the need for an external biasing device (stress device), and the upper support arms 21L and 21R and the lower support arms 22R and 22L have outward elasticity. In addition, when the screen 2 is housed in the casing 3, the angle between the urging device and the lower arms 22R and 22L changes, so that the upward support force is not lost. The pair of L-shaped foldable support arms 22L, 21R, 22R, 21L are located on the left and right sides of the screen 2 with the substantially central portion (vertical line C) in the left-right direction. The upper support arm hinge of the left L-type folding support arm is connected to the center of the upper connecting rod support unit in the left-right direction, and the hinge of the lower support arm is connected to the base unit on the left side of the back of the casing. A hinge joint portion between the upper support arm and the lower support arm is provided on the right side of the center portion of the upper end support unit in the left-right direction. In addition, the upper arm hinge of the L-shaped folding support arm on the right side is connected to the center in the left-right direction of the support unit of the upper connecting rod. At the same time, the lower support arm hinge connects to the base unit on the right side behind the casing. A hinge joint between the upper support arm and the lower support arm is provided on the left side of the center portion of the upper end support unit in the left-right direction.

  However, the following problems exist in the above-mentioned L-type folding elastic support arm. During the process of retracting the screen, the internal angles of the two support arms gradually decrease from about 120 ° to 0 °. At the same time, the spring is gradually pulled, and the generated pulling force becomes stronger and the opening elasticity of the L-type folding support arm becomes stronger. Then, when the screen is fully retracted, the center part of the upper connecting rod is locked to the center part of the outer shell. In addition, the upper end of the arm is connected to the handle cover or holder of the upper connecting rod and has an upward elasticity.

  The present invention solves the above-mentioned problems by setting the shape of the tension guide groove at the hinge joint. The shape of the pulling guide groove adopts an eccentric groove and is composed of a semicircular groove and a straight groove. Both ends of the semicircular groove are connected to a linear guide groove on the tangent line to form a U shape (or an irregular U shape). The shaft center of the hinge joint is not located at the semicircular circle center, but is separated from the circle center. The cable turns around the guide groove, with the hinge joint shaft at the center of rotation. Further, the cable rotates around the pulling guide groove and pulls the spring to transmit the tension. Depending on the position, the turning radius is different, that is, the length of the arm is different. Therefore, the strength of the outward elastic force generated from the L-type folding elastic support arm is also different due to the action of the spring tension. When the screen is in use, the two arms of the L-foldable support arm open to support the screen and the stress point of the cable is on the hinge joint away from the shaft. That is, since the turning radius is large and the arm is long, the upward torque generated by the spring is large, and the upward support force on the L-type folding support arm is stronger than the tension required to spread the screen. When the screen is fully contained in the casing, the stress point of the hinge joint is close to the shaft. That is, since the turning radius is small and the arm is short, the upward torque generated by the spring is reduced, the upward support force on the L-type folding support arm is reduced to the minimum, and the support force acting on the handle cover is also minimized. To decrease.

  This will be described in more detail as follows. When the screen is fully unfolded, the inner angle of the two arms of the L-foldable support arm is about 120 ° and the spring tension is the lowest. Since the cable is connected to the semicircular groove portion of the hinge portion, the distance from the bottom surface of the semicircular groove to the shaft center of the hinge portion is long and the turning radius is large. Therefore, even if the tension of the spring is the lowest, the L-type folding support arm can support the upper connecting rod with an optimal outward elasticity. On the other hand, when the screen is retracted, the internal angles of the two arms of the L-shaped folding support arm gradually decrease from 120 ° to 0 °. Since the cable is connected to the straight groove part of the hinge part, the distance from the bottom surface of the straight guide groove to the shaft center of the hinge part is short, the turning radius becomes small, and the tension of the spring becomes lower than normal by the tension guide groove . Since the outward elasticity of the L-type foldable support arm is weakened, the L-type foldable support arm can be designed only for the necessary spring tension when the screen is unfolded. There is no need to consider the tensile strength of the spring when the screen is separately stored, and the cost and volume can be reduced.

  The present invention restricts the inner angles of the two arms of the L-shaped folding support arm to be kept below the set angle. Therefore, a pair of restricting convex portions are provided on the upper hinge unit of the hinge joint portion in the L-type foldable support arm, and a pair of restriction support units are provided on the lower hinge unit of the hinge joint portion in the L-type foldable support arm. Is provided. As a result, the hinge joint rotates when the hinge joint rotates at a certain angle, and the opening position restricting projection on the upper hinge unit hits the opening position restricting support unit of the lower hinge unit. To stop. Therefore, the L-shaped folding support arm can hold the specified angle and determine the maximum opening position of the screen. The rotation angle of the hinge portion can be changed by setting the position of the limiting unit.

In the present invention, a pair of friction plates are provided between the connection surfaces of the hinge joints, the hinge joints and the friction plates are connected by screws and nuts, and the magnitude of the frictional force is adjusted. Then, the preload is set by adjusting the looseness of the nut. The hinge joint is composed of two parts, an upper hinge unit and a lower hinge unit. A friction plate is provided between the connection surfaces of the upper hinge unit and the lower hinge unit, and the upper hinge unit, the lower hinge unit, and the friction plate are connected by screws and nuts. When changing the opening position of the screen, if the force necessary to fix the screen in a certain position is balanced by only the tension of the spring, the design of the spring tension becomes difficult. Moreover, as the spring tension increases, the L-type foldable support arm undergoes greater deformation due to force reception, so that the strength can be improved by increasing the cross-sectional area of the upper and lower support arms. In order to solve the above-mentioned problems, a frictional force is applied between the hinge portion and the friction plate, thereby simplifying the requirements in the design of the spring tension, reducing the spring tension, and reducing the deformation of the upper and lower support arms.

A slide connector that is freely slidable is installed between the two lower arms of the L-shaped folding support arms on the left and right sides. The slide connector includes an inner slide connector and an outer slide connector. The inner slide connector has a groove, and the edge of the groove protrudes. A head is provided on the outer slide connector. The head is connected by a shaft and fits into the groove of the inner slide connector. The groove edge of the inner slide connector locks the head of the outer slide connector so that the head can rotate within the groove and slide freely along the length of the support arm. When the screen is used, or when the figure changes in the vertical direction, it is necessary to maintain a relative position between the two arms, and the screen should be supported smoothly and stably without separation. Can do. By connecting the slide connector, the relative position between the two arms can be maintained, and the screen is not tilted or deformed. The upper connecting rod is extended and contracted so that it can stably act on the left and right L-type folding support arms. In other words, the left and right arms perform related operations with their swing angles relatively matched so that the operations can be unified and stably expanded and contracted. With the above-described slide connector mounting method, the relative positions of the two arms can be effectively held. Moreover, in order to implement | achieve the above-mentioned slide connector function, you may attach a magnetic device in the relative surface of the cross part of the lower arm in two L type folding support arms. Alternatively, it is possible to employ a sliding shaft provided with a groove in two lower support arms and having heads at both ends, a groove in which heads at both ends are fitted into the lower support arm, or the like.

  A handle portion is provided at the center of the upper connecting rod connected to one end of the screen. A lock mechanism corresponding to the casing is provided at the center of the upper connecting rod connected to the other end of the screen. The handle portion is used as a handle for expanding the screen when unlocked, and is used as a portable handle after locking. The handle portion is on the handle cover, and the handle cover is mounted on the upper connecting rod. The casing-compatible locking mechanism at the center of the upper connecting rod includes a locking member that can slide in the left-right direction of the screen. In addition, the above-mentioned upper connecting rod and the above-described casing are provided with corresponding meshing portions and meshed portions. For the locking member, a reset spring is used to fix the meshing portion in the upper connecting rod to the corresponding unit in the casing. The lock mechanism includes a lock member, an unlock operation unit, a holder, a screw, a reset spring, and the like. The reset spring is housed in a semicircular groove in the lock member. The unlocking operation portion of the lock member is fitted into a rectangular through hole in the center portion of the handle cover. The other end of the reset spring is pushed into the spring stopper of the handle cover, passes through the center of the holder, and is received in the slide groove on one side of the lock member. A pair of through holes are provided on the left and right sides of the holder, and the lock member is fixed to the handle cover by screw connection.

  DESCRIPTION OF SYMBOLS 1 ... Screen apparatus, 2 ... Screen, 3 ... Casing, 301 ... Opening, 30 ... Reel, 401 ... Upper connecting rod, 14 ... Folding support arm mechanism, 23a ... Front / rear axis 22L ··· Left lower support arm, 22R · · Right lower support arm, 21L · · Left upper support arm, 21R · · Right upper support arm, 6a · · Front / rear shaft, 15L · · Left hinge joint, 15R ..Right hinge joint, 24.Tension spring, 26Tension cable, 7Handle

Claims (14)

A casing that is long in the left-right direction when viewed from the front side, and whose upper surface side is open as an opening for entering and exiting the screen 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 connecting rod corresponding to the opening, which is long in the left-right direction and has the upper end of the screen locked;
A handle portion disposed in a central portion in the left-right direction of the upper connecting rod;
On the rear surface side of the screen, a folding support arm mechanism disposed between the casing and the upper connecting rod;
A screen device comprising:
The foldable support arm mechanism includes a left lower support arm having a lower end pivotably attached to an axis in the front-rear direction with respect to a left end portion of the casing, and a right end portion of the casing. The lower right support arm is attached to the lower end of the left lower support arm so that the lower end is rotatable about a longitudinal axis, and the lower end is connected to the upper end of the left lower support arm via the right hinge joint. A right upper support arm having an upper end attached to the central portion in the left-right direction of the upper connecting rod so as to be rotatable about a longitudinal axis, and a lower end relative to the upper end of the right lower support arm Are connected to each other via a left hinge joint, and the upper end of the upper connecting rod is pivotally centered on the longitudinal axis of the upper connecting rod. A left upper support arm, and a biasing device that biases the folding support arm mechanism in a rising direction, the left lower support arm and the right upper support arm, the right lower support arm and the right support arm An urging device using a tension spring and a tension cable built in at least one hollow portion of the left upper support arm, and urging the folding support arm mechanism by the urging device in the starting direction And the self-supporting function of supporting the screen at an arbitrary rising height position by balancing the force in the folding direction of the folding support arm mechanism due to the screen winding force of the reel and the weight of the upper connecting rod and the handle part. A screen device characterized by comprising:   The tension spring is incorporated in the hollow portion of the left lower support arm, the lower end of the tension spring is connected to the left lower support arm, and one end of the tension cable is connected to the upper end of the tension spring. The other end of the tension cable is connected to the right upper support arm via the right hinge joint, and the tension spring is built in the hollow portion of the right lower support arm, and the lower end of the tension spring Is connected to the right lower support arm, one end of the tension cable is connected to the upper end of the tension spring, and the other end of the tension cable is connected to the left upper support arm via the left hinge joint. And is connected to Screen device as claimed.   The left lower support arm and the right lower support arm are each approximately the same length as the width of the screen, and the left upper support arm and the right upper support arm are each of the width of the screen. The screen device according to claim 1 or 2, wherein the screen device has substantially the same length as ½.   The left lower support arm and the right lower support arm, and the right upper support arm and the left upper support arm are substantially symmetrically arranged with respect to the vertical line in the horizontal center of the screen. The left upper support arm and the right upper support arm intersect each other on the vertical line when the folding support arm mechanism is in a standing state, and the folding support arm mechanism is in a rising state and a folding state. The right hinge joint and the right upper support arm are always on the right side of the vertical line, and the left hinge joint and the left upper support arm are always on the left side of the vertical line. The screen device according to claim 3.   A slide connector that connects the left lower support arm and the right lower support arm so as not to be separated from each other at the intersecting portion and so as to be freely rotatable with respect to each other, and the rising operation and folding of the folding support arm mechanism 5. The screen device according to claim 4, further comprising a slide connector that slides along the length of each of the left lower support arm and the right lower support arm in accordance with an operation.   The slide connector includes a first slider and a second slider that are fitted to the left lower support arm and the right lower support arm so as to be slidable along their lengths, respectively, and the first slider And one of the second sliders has a groove, the other has a head, the head is connected to the slider at the shaft portion, and is housed in the groove of the slider on the grooved side, The edge of the groove protrudes and holds the head, whereby the first slider and the second slider are connected so as to be relatively rotatable about the shaft portion. A screen device according to claim 1.   The left hinge joint and the right hinge joint each have a tension guide groove for suspending the tension cable, and the tension guide groove is a U-shaped eccentric groove composed of a semicircular groove and a straight groove, and the straight The distance from the groove bottom face of the groove to the hinge joint center is shorter than the distance from the groove bottom face of the semicircular groove to the hinge joint center, according to any one of claims 2 to 6. Screen device.   The left hinge joint and the right hinge joint are each composed of two parts, an upper hinge unit and a lower hinge unit, and a tension guide groove for hanging the tension cable around the upper hinge unit and the lower hinge unit The screen device according to claim 2, further comprising:   A restricting convex portion and a restricting support unit for defining a rising upper limit height of the foldable support arm mechanism at the upper hinge unit and the lower hinge unit of at least one of the left hinge joint and the right hinge joint. The screen device according to claim 8, wherein the screen device is provided.   A friction plate is provided between connection surfaces of the upper hinge unit and the lower hinge unit, and the upper hinge unit, the lower hinge unit, and the friction plate are connected by screws and nuts. Item 10. The screen device according to Item 8 or Item 9.   A meshing portion is provided on the handle portion side, a meshed portion corresponding to the meshing portion is provided on the casing side, and the handle is engaged by the engagement of the meshing portion and the meshed portion. The screen device according to any one of claims 1 to 10, wherein a portion side is locked to the casing side.   The screen device according to claim 11, further comprising a lock mechanism that can lock the engagement between the meshing portion and the meshed portion and release the lock.   13. The handle portion according to claim 12, wherein the handle portion is on a handle cover, the handle cover is mounted on the upper connecting rod, and the lock mechanism is disposed on the handle cover. Screen device.   The lock mechanism is provided on the handle cover so as to be slidable. The lock mechanism includes a lock member having the engagement portion, and the lock member is engaged with the engagement portion in a direction in which the engagement portion is engaged with the engagement portion. 14. The screen device according to claim 13, further comprising a biasing member that moves and biases, and an unlocking operation portion that is provided on the lock member and is exposed to the outside of the handle cover. .