JP2010019952A - Screen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screen capable of achieving improvement of portability and operability of a supporting leg by achieving not only miniaturization when the supporting leg is housed but also high efficiency and easiness in developing operation when the supporting leg is developed. <P>SOLUTION: The screen 1 includes the supporting leg 20. The supporting leg 20 includes: a fixed column 15 supporting a screen body 12; three leg parts 21 erecting and supporting the fixed column 15, and having a multiple-stage link mechanism; a leg fixing part 22 configured to journal the three leg parts 21 to be turnable, and fixing them to the fixed column 15; and a leg sliding part 23 supported to be slidable along the fixed column 15 and configured to journal the three leg parts 21 to be turnable. The leg sliding part 23 slides to separate from and approach to the leg fixing part 22, whereby the multiple-stage link mechanism is driven to make the three leg parts 21 approach to and separate from each other. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a screen.

  2. Description of the Related Art Conventionally, a screen including an image projection unit having a screen main body on which image light enlarged and projected from a projector or the like is projected, and a support leg having a leg portion that supports and fixes the image projection unit is known. . A general support leg is configured with a simple link mechanism substantially similar to a tripod for fixing a camera. In recent years, the image projection area of the screen main body has been enlarged. For example, a screen main body that secures an image projection area of 80 inches or 100 inches has been adopted.

  In the above-described support leg, when the leg portion is accommodated, the length of the folded leg portion is the length in the direction along the fixed support as it is. Further, when deploying the leg portion, a space in the horizontal direction or the vertical direction is required with respect to the installation surface. In addition, the screen body with an enlarged image projection area increases the weight of the image projection unit, and the support legs that support it need to be enlarged to ensure rigidity. The length along the direction increases, and the space in the horizontal and vertical directions during deployment also increases. Therefore, a portable screen uses a separate structure (two-body structure) in which a support leg and an image projection unit are configured separately and the image projection unit is assembled to the support leg.

  Note that the support leg described in Patent Document 1 is configured such that the image projection unit is attached to a support column supported upright by a tripod, and the entire screen is supported.

Utility Model Registration No. 3040235

  However, the above-described support legs of the screen have a problem of reducing portability and operability, including a separate structure from the image projection unit. Therefore, there has been a demand for a screen that can be reduced in size when the support legs are stored, and that the efficiency and ease of the deployment operation during deployment are improved, and the portability and operability of the support legs can be improved.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A screen according to this application example is a screen having a screen body on which image light is projected. The screen includes a support leg, and the support leg includes a fixed column that supports the screen body, and a fixed column. A plurality of legs configured to have a multi-stage link mechanism, a leg fixing unit that pivotally supports the plurality of legs so as to be fixed to the fixed column, and a fixed column. A leg slide part that is supported so as to be slidable along and pivotally supports a plurality of leg parts, and the leg slide part slides away from and approaches the leg fixing part, A multistage link mechanism is driven, and a plurality of legs are brought close to and separated from each other.

  The screen includes a support leg, and the support leg includes a fixed column, a plurality of legs, a leg fixing part, and a leg slide part. The fixed support supports the screen main body, and the plurality of legs have a multi-stage link mechanism to support the fixed support upright. The leg fixing part pivotally supports a plurality of leg parts so as to be rotatable and fixes the leg parts to the fixed support column. The leg slide portion is slidably supported along the fixed support column, and pivotally supports the plurality of leg portions so as to be rotatable. Then, the leg slide portion slides so as to be separated from and close to the leg fixing portion, so that the multi-stage link mechanism is driven to bring the plurality of leg portions close to each other.

  Thus, when the leg slide part is separated from the leg fixing part, the support leg of the screen is constituted by a single link mechanism by the proximity of a plurality of leg parts having a multistage link mechanism. It can be folded more compactly than the legs that are used. Accordingly, it is possible to reduce the size of the leg when stored. In addition, when the leg slide part is close to the leg fixing part, a plurality of leg parts having a multi-stage link mechanism are separated from each other, compared to a leg part constituted by a single link mechanism. The slide amount of the leg slide portion can be reduced, and the leg can be developed so as to have a wide development area. Accordingly, it is possible to realize the efficiency and ease of the support leg unfolding operation. As a result, a screen with improved support leg portability and operability can be realized.

  Application Example 2 In the above-described screen, the plurality of leg portions include a first leg portion that makes one end abut against the installation surface, and one end portion on the other end side of the first leg portion. The second leg part pivotally supported by the leg fixing part and the other end part of the second leg part. The second leg portion is pivotally supported by being connected to the substantially intermediate portion, the other end portion is pivotally supported by the leg slide portion, and one end portion is the first end portion. The multi-stage link mechanism includes a leg regulating member that is pivotably connected to an end of the leg, and the other end is pivotally connected to a substantially intermediate portion of the third leg. The leg slide portion slides away from and approaches the leg fixing portion, so that the third leg rotates the second leg portion, and the first leg portion connected to the second leg portion is legged. Although it is regulated by a regulation member It is preferable to close and separate the plurality of legs.

  In the support legs of the screen, the plurality of leg portions each include a first leg portion, a second leg portion, a third leg portion, and a leg regulating member to constitute a multistage link mechanism. In addition, the first leg portion makes one end abut against the installation surface. The second leg has one end connected to the other end of the first leg, pivotally supporting the first leg, and the other end rotating to the leg fixing part. It is pivotally supported. The third leg has one end connected to a substantially intermediate portion of the second leg and pivotally supports the second leg, and the other end pivots to the leg slide. Be supported. In addition, one end of the leg restricting member is rotatably connected to the end of the first leg, and the other end is rotatably connected to a substantially intermediate portion of the third leg.

  Then, by sliding the leg slide portion so as to be separated and close to the leg fixing portion, the third leg portion whose other end is pivotally supported by the leg slide portion is driven, and the leg portion of the third leg portion is driven. The second leg portion whose one end portion is connected to the substantially intermediate portion is rotated. When the second leg portion rotates, the first leg portion connected to the one end portion of the second leg portion on the other end side rotates while being regulated by the leg regulating member. By this operation, the plurality of legs are brought close to and separated from each other. Thereby, a screen having the same effect as described above can be realized with a simple configuration.

  (Application example 3) In the above screen, when a plurality of legs are brought close to each other, an end surface of the fixed support or the leg fixing unit is in relation to an end surface of one end of the first leg. It is preferable that they are equivalent or projecting.

  In the support leg of the screen, the end surface of the fixed column or the leg fixing portion is equal to or protrudes from the end surface of one end portion of the first leg portion, so that the support leg is installed (the leg). In the case where the parts are separated (deployed), first, the end surface of the fixed column or the leg fixing part can be brought into contact with the installation surface (for example, the floor surface). As a result, the supporting leg can be placed on the installation surface in a stable manner as compared with the case where the close leg portion is first brought into contact with the installation surface. Next, the end slide surface of one end of the first leg is slid by sliding the leg slide in a state in which the end face of the fixed column or the leg fixing portion is placed (abutted) on the installation surface. It is also possible to easily deploy it until it comes into contact with the installation surface. Thereafter, by further sliding the leg slide part, the leg part can be fully deployed and the fixed support can be erected. Further, when the legs are folded (the legs are brought close to each other), this can be done by performing the reverse operation. Accordingly, it is possible to realize a screen that improves the operability with respect to the expansion and folding of the support legs.

  Application Example 4 In the above-described screen, the fixed support column, the first leg portion, the second leg portion, and the third leg portion are preferably formed of a hollow columnar member.

  In the above screen, in the support leg, the fixed column, the first leg, the second leg, and the third leg are formed of a hollow columnar member, so that the fixed column, the first leg, and the second leg are formed. Rigid force required for the leg portion and the third leg portion can be ensured. Further, when the legs are unfolded and stored (folded), the risk of pinching fingers or the like at the intersecting portions can be reduced as compared with the case where the plate member is formed by punching. In addition, the weight of the support leg can be reduced.

Hereinafter, embodiments will be described with reference to the drawings.
(Embodiment)

  1 and 2 are perspective views showing a schematic configuration of a screen according to the first embodiment. 1 is a perspective view of the screen 1 as seen from the front side where the image light is incident, and FIG. 2 is a perspective view of the screen 1 as seen from the back side. FIG. 3 is a partially enlarged view of the main part of the screen as viewed from the back side. FIG. 3 illustrates the second pantograph mechanism 17, the fixed support column 15, the second support portion 14, and the like. The configuration of the screen 1 will be described with reference to FIGS. Note that “left” and “right” described below mean left and right when viewed from the back side of the screen 1.

  The screen 1 is projected with image light enlarged and projected from, for example, a projector (not shown). As shown in FIGS. 1 and 2, the screen 1 is roughly composed of an image projection unit 10 and support legs 20.

  As shown in FIG. 1 or FIG. 2, the image projection unit 10 includes a screen body 12 that is a portion onto which image light is projected, a fixed column 15, a first support unit 13 and a second support unit 14, A pantograph mechanism 16 and a second pantograph mechanism 17, an arm fixing part 18, and an arm slide part 19 are provided. The screen body 12 is formed in a flexible sheet shape, and is configured by a reflective screen that reflects and displays image light incident on the front side.

  The first support portion 13 is a portion that extends along the left end portion of the left and right end portions of the screen body 12 having a rectangular shape and supports the left end portion of the screen body 12. As shown in FIG. 1 or 2, the first support portion 13 includes a first support housing 131, a spring roll 132 as a winding portion that winds up the screen body 12, a first grip portion 133, 1 fixing part 134, 1st slide fixing | fixed part 135, etc. are provided.

  As shown in FIG. 1 or FIG. 2, the first support housing 131 is a substantially rectangular parallelepiped housing extending in the vertical direction, and accommodates a spring roll 132 in a rotatable manner. In the first support housing 131, an opening 1311 is formed on the right end surface as shown in FIG. 2, and the screen body 12 is inserted into the inside and the outside.

  As shown in FIG. 1, the spring roll 132 is a member that is rotatable about the vertical direction of the screen body 12 as a rotation axis and winds up the screen body 12. Although not specifically shown, the spring roll 132 is biased in the winding direction of the screen body 12 by a spring, and has a function of automatically winding the screen body 12 when the pulling force of the screen body 12 is loosened. is doing.

  As shown in FIG. 1 or FIG. 2, the first grip 133 is attached to the left side surface of the first support housing 131 and a substantially central portion in the vertical direction at the end surface corner on the back surface. This is a portion that is gripped by the user in order to move left and right.

  As shown in FIG. 2, the first fixing portion 134 is configured on the back side of the first support housing 131 and pivotally supports an arm member 164 of the first pantograph mechanism 16 described later. is there. Specifically, the first fixing portion 134 has a substantially rectangular fixing portion main body 1341 fixed to the back surface side of the first support housing 131, and the arm member 164 is pivotally supported via the rotation shaft 1342. is doing.

  As shown in FIG. 2, the first slide fixing part 135 is configured above the first fixing part 134 on the back side of the first support housing 131, and the arm member 162 of the first pantograph mechanism 16 to be described later is provided. It is slidable and pivotally supported. Specifically, the first slide fixing portion 135 includes a slide hole 1353, a fixing portion main body 1351, and a rotation shaft 1352. The slide hole 1353 is formed in a slit shape along the vertical direction of the first support housing 131 on the back side of the first support housing 131. Further, the fixed portion main body 1351 is formed in a substantially H-shaped horizontal cross section that is slidable along the outer periphery of the slide hole 1353. The fixed portion main body 1351 pivotally supports an arm member 162 (described later) via a rotation shaft 1352 so as to be rotatable.

  The second support portion 14 is a portion that extends along the right end portion of the screen body 12 and supports the right end portion of the screen body 12. As shown in FIGS. 1 to 3, the second support portion 14 includes a second support housing 141, a second grip portion 143, and a coil spring 142 as a biasing portion that biases an arm member described later. The second fixing portion 144 and the second slide fixing portion 145 are provided.

  As shown in FIGS. 1 to 3, the second support housing 141 has substantially the same shape as the first support housing 131, and through an opening 1411 (see FIG. 1) formed on the left end surface, The right end of the screen body 12 is supported inside.

  As shown in FIG. 2 or FIG. 3, the second gripping part 143 has substantially the same shape as the first gripping part 133, and is provided at the right side surface of the second support housing 141 and the end face corner on the back side. It is a part that is attached to a substantially central part in the vertical direction and is gripped by the user in order to move the second support part 14 in the horizontal direction.

  Further, as shown in FIG. 2 or FIG. 3, the second fixing portion 144 is configured on the back side of the second support housing 141 and pivotally supports an arm member 174 of the second pantograph mechanism 17 described later. To do. Specifically, the second fixing portion 144 has a fixing portion main body 1441 having a substantially C-shaped horizontal section fixed to the back side of the second support housing 141, and the arm member 174 can be rotated via the rotation shaft 1442. It is pivotally supported.

  As shown in FIG. 2 or FIG. 3, the second slide fixing portion 145 is configured above the second fixing portion 144 on the back side of the second support housing 141, and is an arm member of the second pantograph mechanism 17 described later. The 172 is slidable and pivotally supported. Specifically, the second slide fixing portion 145 includes a slide hole 1453, a fixing portion main body 1451, and a rotation shaft 1452. The slide hole 1453 is formed in a slit shape along the vertical direction of the second support housing 141 on the back side of the second support housing 141. In addition, the fixed portion main body 1451 is formed in a substantially H-shaped horizontal section that is slidable along the outer periphery of the slide hole 1453. The fixed portion main body 1451 pivotally supports an arm member 172 described later via a rotation shaft 1452 so as to be rotatable.

  Here, FIG. 4 is a plan view showing the configuration of the urging portion. FIG. 4 shows a plan view of the second support portion 14 shown in FIG. 2 when cut in parallel to the screen body 12 and viewed from the front side. In other words, the figure of the state which looked at the urging | biasing part from the inner surface of the 2nd support part 14 is shown. The urging unit will be described with reference to FIG.

  The urging portion is a member that urges the first support portion 13 and the second support portion 14 in a direction in which they are separated from each other. In the present embodiment, it is installed inside the second support portion 14. In the present embodiment, the coil spring 142 is used as the urging portion. As shown in FIG. 4, the coil spring 142 is formed as a tension coil spring and includes a spring main body 1421 and hooks 1422 formed at both ends of the spring main body 1421.

  As shown in FIG. 4, a protrusion 1451 a that protrudes to the inner surface side of the second support housing 141 is formed on the fixing portion main body 1451 of the second slide fixing portion 145. One hook 1422 of the coil spring 142 is hooked and fixed to the protruding portion 1451a. Further, as shown in FIG. 4, a protrusion 1441 a that protrudes to the inner surface side of the second support housing 141 is also formed on the fixing portion main body 1441 of the second fixing portion 144. The other hook 1422 of the coil spring 142 is hooked and fixed to the protruding portion 1441a. As shown in FIG. 2 or FIG. 3, the coil spring 142 configured and fixed in this way can see a part of the spring main body 1421 through the slide hole 1453 of the second support portion 14.

  As shown in FIG. 2, the fixed column 15 is disposed at the center of the first support portion 13 and the second support portion 14, and extends in the vertical direction in parallel to the plane of the screen body 12. The fixed support 15 is composed of two bodies, a first fixed support 151 and a second fixed support 152. And the fixed support | pillar 15 is formed with the member of the hollow pillar shape whose horizontal cross section is substantially track shape.

  As shown in FIGS. 2 and 3, the fixed column 15 is inserted into the first fixed column 151 from the upper end of the second fixed column 152, and the first fixed column 151 advances and retreats in the extending direction (vertical direction). It is free. And after adjusting the extension length of the 1st fixed support | pillar 151 by the support | pillar fixing | fixed part 153 installed in the upper end part of the 2nd fixed support | pillar 152, the 1st fixed support | pillar 151 can be fixed to the 2nd fixed support | pillar 152. it can. That is, by adjusting the extension length of the first fixed column 151 with respect to the second fixed column 152, the height from the installation surface (for example, the floor surface) of the screen body 12 can be adjusted. 153 can be fixed.

  As shown in FIGS. 2 and 3, the column fixing part 153 is formed in a cylindrical shape with a column fixing unit main body 1531 inserted through the upper end of the second fixed column 152 and installed on the second fixed column 152. A lever portion 1533 that is pivotally supported and fixed to a column fixing portion main body 1531 by a moving shaft 1532 is configured. 2 and 3, when the lever portion 1533 is rotated upward, the contact portion 1534 (see FIG. 7) formed on the inner surface side of the column fixing portion main body 1531 is the side portion of the first fixing column 151. Release contact to the. As a result, the first fixed column 151 can move forward and backward with respect to the second fixed column 152. As shown in FIG. 2 or 3, when the lever portion 1533 is rotated downward, the contact portion 1534 makes contact with the side surface portion of the first fixed column 151. Thereby, the first fixed column 151 is fixed to the second fixed column 152 by the frictional force with the contact portion 1534.

  As shown in FIGS. 2 and 3, the first pantograph mechanism 16 and the second pantograph mechanism 17 are provided between the fixed support 15 and the first support part 13 and between the fixed support 15 and the second support part 14. It is a member that can be expanded and contracted, expands and contracts around the fixed support column 15, and brings the first support portion 13 and the second support portion 14 close and expand. The first pantograph mechanism 16 and the second pantograph mechanism 17 have a plurality of arm members, which will be described later, connected in an intersecting manner, and are configured to be able to bend and stretch. Further, the first pantograph mechanism 16 and the second pantograph mechanism 17 of the present embodiment are installed with the fixed support 15 interposed therebetween, parallel to the screen body 12 and with a small separation distance from the screen body 12.

  As shown in FIGS. 2 and 3, the arm fixing portion 18 is disposed at a predetermined position of the fixing column 15 (first fixing column 151) with one arm member 163 (described later) intersected by the first pantograph mechanism 16, This is a member that pivotally supports and fixes one arm member 173, which will be described later, intersected by the two pantograph mechanism 17. 2 or 3, the arm slide portion 19 is supported so as to be slidable along the fixed column 15 (first fixed column 151), and the other arm, which will be described later, intersects with the first pantograph mechanism 16. It is a member that pivotally supports the member 161 and the other arm member 171 (described later) intersecting with the second pantograph mechanism 17.

  Here, with reference to FIG. 2, FIG. 3, the detailed structure and operation | movement of the 1st pantograph mechanism 16, the 2nd pantograph mechanism 17, the arm fixing | fixed part 18, and the arm slide part 19 are demonstrated.

  The first pantograph mechanism 16 is installed between the fixed support 15 and the first support portion 13. In this embodiment, the arm members 161, 162, 163, and 164, which are formed of hollow columnar members, are configured as a plurality of arm members that can be bent and stretched and are crossed and connected. . Specifically, the arm members 161 and 162 are pivotally supported and connected to a rotation shaft 1612 that is substantially orthogonal to the screen main body 12 at the end, and the arm members 163 and 164 are connected to the screen at the end. A pivot shaft 1634 that is substantially orthogonal to the main body 12 is pivotally supported and connected.

  The connected arm members 161 and 162 and the arm members 163 and 164 are further pivotally supported and connected to the rotation shaft 1613 at a substantially central portion between the arm member 161 and the arm member 163. The arm member 162 and the arm member 164 are pivotally supported and connected to the rotation shaft 1624 at a substantially central portion. By such connection, the arm members 161, 162, 163, 164 are in the form of a pantograph, and the first pantograph mechanism 16 is configured.

  In addition, an arm member 163 serving as one of the intersecting arm members of the first pantograph mechanism 16 is pivotally supported by the pivot shaft 1821 at the end portion thereof so as to be pivotable. In addition, an arm member 161 that is the other arm member that intersects the first pantograph mechanism 16 is pivotally supported by the pivot shaft 1913 at the end thereof so as to be pivotable with the arm slide portion 19.

  In addition, an arm member 164 serving as one of the intersecting arm members of the first pantograph mechanism 16 is fixed to the first fixing portion 134 of the first support portion 13 at an end portion thereof, and can be rotated by a rotation shaft 1342. Is pivotally supported. An arm member 162 that is the other arm member that intersects the first pantograph mechanism 16 is pivotally supported by the first slide fixing portion 135 of the first support portion 13 by the rotation shaft 1352 at the end thereof. In addition, it is slidable along the slide hole 1353.

  The second pantograph mechanism 17 is configured in the same manner as the first pantograph mechanism 16, and is installed symmetrically with the first pantograph mechanism 16 around the fixed support 15.

  Specifically, the second pantograph mechanism 17 is installed between the fixed column 15 and the second support portion 14. In this embodiment, the arm members 171, 172, 173, and 174 that are formed of hollow columnar members are configured as a plurality of arm members that can be bent and stretched and are connected to cross each other. . Specifically, the arm members 171 and 172 are pivotally supported and connected to a rotation shaft 1712 that is substantially orthogonal to the screen body 12 at the ends, and the arm members 173 and 174 are screens at the ends. A pivot shaft 1734 substantially orthogonal to the main body 12 is pivotally supported and connected.

  The connected arm members 171 and 172 and the arm members 173 and 174 are further pivotally supported and connected to the rotary shaft 1713 at a substantially central portion between the arm member 171 and the arm member 173. In addition, the arm member 172 and the arm member 174 are pivotally supported and connected to the rotation shaft 1724 at a substantially central portion. By such connection, the arm members 171, 172, 173, and 174 are in the form of a pantograph, and the second pantograph mechanism 17 is configured.

  In addition, an arm member 173 serving as one of the intersecting arm members of the second pantograph mechanism 17 is pivotally supported by the pivot shaft 1821 at the end thereof so as to be pivotable with the arm fixing portion 18. In addition, an arm member 171 serving as the other arm member intersecting with the second pantograph mechanism 17 is pivotally supported by the pivot shaft 1913 at the end portion thereof so as to be pivotable.

  In addition, an arm member 174 serving as one of the intersecting arm members of the second pantograph mechanism 17 is fixed to the second fixing portion 144 of the second support portion 14 at its end portion, and can be rotated by the rotation shaft 1442. Is pivotally supported. Then, the arm member 172 serving as the other arm member intersecting with the second pantograph mechanism 17 is pivotally supported on the second slide fixing portion 145 of the second support portion 14 by the rotation shaft 1452 at the end thereof. In addition, it is slidable along the slide hole 1453.

  The arm fixing unit 18 is fixed to the fixed column 15 (first fixed column 151) in the downward direction of the arm slide unit 19. The arm fixing portion 18 has a cylindrical shape, an arm fixing portion main body 181 inserted through the first fixing support 151 and fixed to the first fixing support 151 with a screw or the like, and a screen main body passing through a substantially central axis of the arm fixing portion main body 181. 12 and a pair of arm fixed shaft support portions 182 formed so as to protrude in a rectangular shape in a horizontal direction. The arm fixing portion 18 is a pair of arm fixing shaft support portions 182, and can be rotated by a rotation shaft 1821 installed at one end of the arm members 163 and 173 substantially orthogonally to the screen body 12. Pivot.

  In addition, the fixed column 15 (first fixed column 151) has a holding unit 155 formed in a substantially arch shape so as to straddle the arm fixing unit 18 (arm fixing unit main body 181) in the vertical direction, and the arm fixing unit main body 181. It is fixed with screws. The grip portion 155 is a member for stabilizing the fixed column 15 when the user grips the screen body 12 when the screen body 12 is expanded or folded.

  The arm slide part 19 is installed above the arm fixing part 18. The arm slide portion 19 is configured by being divided into two bodies, a support slide portion 191 and a support slide fixing portion 192.

  The support slide fixing portion 192 is a member that determines the development size of the screen body 12 according to the aspect ratio of the image light projected onto the screen body 12. In addition, the support slide section 191 is positioned above the support slide fixing section 192. After the support slide fixing section 192 is positioned and fixed at a predetermined position of the first fixed support 151, the support slide fixing section 192 is moved upward. This is a member that is slid until it comes into contact with the end surface 1921d (see FIG. 3). In addition, when the screen body 12 is expanded by the first pantograph mechanism 16 and the second pantograph mechanism 17 until the support slide portion 191 contacts the support slide fixing portion 192, the size of the expanded screen body 12 is determined as follows. This corresponds to the aspect ratio determined by the slide fixing unit 192.

  Here, FIG. 5 is a sectional view of the support slide fixing portion, FIG. 5A is a vertical sectional view of the support slide fixing portion, and FIG. 5B is a horizontal direction of the support slide fixing portion. FIG. 5C is a cross-sectional view, and FIG. 5C is a vertical cross-sectional view showing a state where the support slide fixing portion is slid. With reference to FIGS. 3 and 5, the configuration and operation of the support slide fixing portion 192 will be described.

  The column slide fixing part 192 is cylindrical and is configured by being inserted through the first fixed column 151. The support slide fixing unit 192 includes a fixing operation unit 1922, a slide gripping unit 1923, and a slide regulating unit 1924 based on the slide fixing main body 1921.

  The slide grip portion 1923 is formed in a substantially arch shape at the lower part of the side surface of the slide fixing main body 1921. The slide grip 1923 is a member that is gripped by the user and slides the column slide fixing unit 192 along the first fixed column 151.

  The fixed operation unit 1922 is installed on the upper part of the slide gripping unit 1923, and includes a fixed operation unit main body 1922a, a fixed projection 1922b, and a fixing spring 1922c as shown in FIG. Yes. The fixing operation unit 1922 is installed by being guided by a first guide unit 1921 a formed on the slide fixing main body 1921. The fixed operation portion main body 1922a is guided by the first guide portion 1921a, and the fixing spring 1922c is accommodated between the fixed operation portion main body 1922a and the first guide portion 1921a. The fixed operation unit main body 1922a is installed above the slide gripping part 1923 so as to protrude from the slide fixing main body 1921 and to be pushed substantially perpendicularly in the extending direction of the fixed support column 15.

  The fixed protrusion 1922b is a member that is formed on the fixed operation unit main body 1922a and protrudes inward toward the fixed column 15 on the screen main body 12 side of the fixed operation unit main body 1922a. The fixed protrusion 1922b is fitted into any one of the first fixed hole 1511, the second fixed hole 1512, and the third fixed hole 1513 formed on the side surface of the fixed column 15 on the screen body 12 side. The column slide fixing part 192 is fixed to the fixed column 15.

  FIGS. 5A and 5B show a state in which the fixing protrusion 1922b of the support slide fixing portion 192 is fitted and fixed to the first fixing hole 1511 formed in the fixing support 15. FIG. Yes. The first fixed hole 1511 is a hole that determines the development size of the screen body 12 in correspondence with image light having an aspect ratio of “4: 3”. The second fixed hole 1512 is a hole corresponding to image light having an aspect ratio of “16:10”, and the third fixed hole 1513 is a hole corresponding to image light having an aspect ratio of “16: 9”. is there. In this case, the first fixing hole 1511 is positioned at the top of the three holes, then the second fixing hole 1512 is positioned, and the third fixing hole 1513 is positioned at the bottom.

  The slide restricting portion 1924 is installed on the upper part of the fixed operation portion 1922. As shown in FIGS. 5A and 5C, the restricting portion main body 1924a, the restricting projection portion 1924b, and the restricting spring 1924c. And is configured. The slide restricting portion 1924 is installed by being guided by a second guide portion 1921b formed on the slide fixing main body 1921.

  In addition, a guide hole 1921 c is formed in the second guide portion 1921 b so as to be opposed to the restriction hole 1514 formed in the first fixed column 151. Further, the restricting protrusion 1924b is formed in a prismatic shape having a tapered portion T in the downward direction. In the second guide portion 1921b, the tapered portion T of the restricting projection portion 1924b is installed so as to be inserted into the guide hole 1921c, and the restricting spring 1924c is accommodated between the restricting projection portion 1924b and the restricting portion main body 1924a. Yes. The restricting portion main body 1924a is fixed to the slide fixing main body 1921.

  As shown in FIGS. 5A and 5B, when the fixing operation portion 1922 (fixing projection portion 1922b) is fitted with the first fixing hole 1511 located at the uppermost portion, the slide restriction is performed. The tapered portion T of the restriction projection 1924b of the portion 1924 also passes through the guide hole 1921c and is inserted into the restriction hole 1514. By this slide restricting portion 1924, the fixing operation portion 1922 is operated to restrict the support slide fixing portion 192 from sliding upward (sliding upward is impossible). However, as will be described later, sliding downward is possible.

  As shown in FIGS. 2 and 3, the column slide part 191 constituting the arm slide unit 19 is inserted through the fixed column 15 (first fixed column 151) in the upward direction of the column slide fixing unit 192, and is fixed first. It is slidably supported along the column 151. The column slide part 191 is cylindrical and has a rectangular shape in a direction substantially horizontal to the surface of the screen body 12 across the substantially central axis of the column slide part 191 and the slide body 1911 inserted through the first fixed column 151. It has a pair of slide shaft support portions 1912 formed so as to protrude by two.

  Further, the column slide portion 191 has a slide shaft support portion 1912 formed two by two and sandwiches the other end portion of the arm member 161 intersecting with the first pantograph mechanism 16 between the two slide shaft support portions 1912. In this state, the arm member 161 is pivotally supported via a rotation shaft 1913 substantially orthogonal to the screen body 12. Similarly, with the other end portion of the arm member 171 intersecting the second pantograph mechanism 17 sandwiched between the other two slide shaft support portions 1912, the rotation shaft 1913 substantially orthogonal to the screen body 12 is also provided. The arm member 171 is pivotally supported via the.

Here, operations for sliding the support slide fixing portion 192 and operations of the support slide portion 191 will be described.
When the support slide fixing portion 192 is slid, for example, in the state shown in FIG. 5A, while holding the slide grip portion 1923, the fixed operation portion 1922 that is installed above and protrudes is fixed to the fixed support 15 side. The operation which pushes into is performed. Following this operation, the pair of fixing springs 1922c formed as compression coil springs are compressed, and the fixing protrusion 1922b fitted in the first fixing hole 1511 moves to the screen body 12 side. As a result, the first fixed hole 1511 is detached. After setting it in such a state, the support | pillar slide fixing | fixed part 192 is slid with respect to the fixed support | pillar 15 (in this case, it slides below).

  5A, when the fixed protrusion 1922b is detached from the first fixed hole 1511 and starts to slide, the above-described restriction protrusion 1924b of the slide restriction portion 1924 is removed from the restriction hole 1514. Must be removed. For this purpose, the user slides with a slight downward force while holding the slide holding portion 1923. By this operation, in the slide restricting portion 1924, the tapered portion T of the restricting projection portion 1924b compresses the restricting spring 1924c formed as a compression coil spring while sliding on the outer peripheral portion of the restricting hole 1514, thereby restricting the restricting portion main body. Move to the 1924a side. As a result, the restricting protrusion 1924b is not inserted into the restricting hole 1514. After this state is reached, the slide grip 1923 can be slid downward along the fixed column 15 while being gripped.

  As shown in FIG. 5C, in a state where the column slide fixing part 192 is slid along the fixed column 15, the fixing projection 1922b of the fixing operation unit 1922 is a state in which the fixing spring 1922c is compressed. Then, the side surface of the first fixed column 151 is slid. In this state, the fixed protrusion 1922b always slides while pressing the side surface of the first fixed column 151. In addition, the restricting protrusion 1924b of the slide restricting portion 1924 also slides on the side surface of the first fixed column 151 in a state where the restricting spring 1924c is compressed.

  When the support slide fixing portion 192 is slid and the fixing projection 1922b of the fixing operation unit 1922 is positioned in the second fixing hole 1512 formed in the first fixing support 151, the fixing projection 1922b is compressed. The second fixing hole 1512 is fitted by the force of the fixing spring 1922c. By this operation, the column slide fixing part 192 is fixed to the first fixed column 151.

  When the support slide fixing portion 192 is slid along the support support 15, the support slide portion 191 located above the support slide fixing portion 192 is operated by the coil spring 142 as an urging portion and the support slide portion. It slides along the 1st fixed support | pillar 151 so that the slide operation | movement of the support | pillar slide fixing | fixed part 192 may be followed by the weight of 191. Therefore, when the support slide 191 slides following the slide of the support slide fixing part 192 and the support slide fixing part 192 is fixed at the position of the second fixing hole 1512, the support slide part 191 is fixed. The lower end slide is stopped by coming into contact with the upper end surface 1921d of the support slide fixing portion 192.

  In addition, when the support slide portion 191 slides downward, the arm members 161 and 171 pivotably supported by the slide shaft support portion 1912 of the support slide portion 191 rotate about the rotation shaft 1913. While sliding down. By this operation, the first pantograph mechanism 16 and the second pantograph mechanism 17 move so as to extend in the left-right direction.

The detailed operation of the first pantograph mechanism 16 and the second pantograph mechanism 17 in this case will be described.
The arm member 161 that is pivotally supported by the slide shaft support portion 1912 of the column slide portion 191 by the column slide portion 191 sliding downward due to the operation of the coil spring 142, the weight of the column slide portion 191, or the like. , 171 slides downward while rotating about the rotation shaft 1913. At the same time, the arm members 163 and 173 that are pivotally supported by the arm fixing shaft supporting portion 182 of the arm fixing portion 18 rotate about the rotating shaft 1821. At the same time, the fixing portion main body 1451 of the second slide fixing portion 145 of the second support portion 14 that is rotatably connected to the arm member 172 of the second pantograph mechanism 17 also slides downward. In conjunction with this operation, the fixed portion main body 1351 of the first slide fixing portion 135 of the first support portion 13 that is rotatably connected to the arm member 162 of the first pantograph mechanism 16 also slides downward. Note that the arm members 171 to 174 constituting the second pantograph mechanism 17 rotate about rotation shafts 1712, 1713, 1724, 1734, 1442 that are pivotally supported. Similarly, the arm members 161 to 164 constituting the first pantograph mechanism 16 are rotated around rotation shafts 1612, 1613, 1624, 1634, and 1342 that are rotatably supported.

  Due to the movement of the first pantograph mechanism 16 and the second pantograph mechanism 17 extending in the left-right direction, the first support part 13 and the second support part 14 to which the first pantograph mechanism 16 and the second pantograph mechanism 17 are connected are separated in the left-right direction. Move to do. And the screen main body 12 stretched by the 1st support part 13 and the 2nd support part 14 is expand | deployed by the left-right direction by the movement which the 1st support part 13 and the 2nd support part 14 space apart. Note that the support slide portion 191 contacts the upper end surface 1921d of the support slide fixing portion 192 fixed at the position of the second fixing hole 1512, and stops the development of the screen body 12.

  Similarly to the above-described operation, the support slide fixing portion 192 can be fixed by sliding downward along the support support 15 and fitting the fixing protrusion 1922b into the third fixing hole 1513. . Then, following the downward slide of the support slide fixing portion 192, the support slide portion 191 further moves so that the first pantograph mechanism 16 and the second pantograph mechanism 17 extend in the left-right direction, and the screen body 12 is further developed. Then, the support slide portion 191 contacts the upper end surface 1921d of the support slide fixing portion 192 fixed at the position of the third fixing hole 1513, and stops the development of the screen body 12.

  Conversely, the column slide fixing portion 192 can be slid upward along the fixed column 15 and fixed to the second fixing hole 1512 and the first fixing hole 1511. In this case, the support slide portion 191 slides while being pressed by the upward slide of the support slide fixing portion 192 in a state of being in contact with the upper end surface 1921d of the support slide fixing portion 192.

  Then, following the upward sliding of the support slide fixing portion 192, the support slide portion 191 slides upward, so that it is rotatably supported by the slide support portion 1912 of the support slide portion 191. The arm members 161 and 171 slide upward while rotating about the rotation shaft 1913. By this operation, the first pantograph mechanism 16 and the second pantograph mechanism 17 move so as to contract in the center direction (the direction of the fixed column 15).

  Further, the first support part 13 and the second support part 14 connected to the first pantograph mechanism 16 and the second pantograph mechanism 17 by the movement of the first pantograph mechanism 16 and the second pantograph mechanism 17 contracted in the direction of the fixed support 15 are Move in the close direction. Then, the screen main body 12 stretched on the first support portion 13 and the second support portion 14 moves in a direction to reduce the expansion by the movement of the first support portion 13 and the second support portion 14 toward each other. To do. Note that, when the support slide fixing portion 192 is fixed at the positions of the second fixing hole 1512 and the first fixing hole 1511, the support slide portion 191 stops the reduction of the expansion of the screen body 12.

  Note that the upward sliding of the support slide portion 191 is actually performed by the user holding the grip portion 155 and the slide grip portion 1923 and sliding the slide grip portion 1923 (support slide fixing portion 192) upward. Thus, the column slide fixing unit 192 is pressed to slide the column column sliding unit 191 upward. When the support slide fixing portion 192 is fixed to the first fixing hole 1511, the upward sliding of the support slide fixing portion 192 is regulated so that the restricting projection portion 1924 b of the slide restricting portion 1924 is inserted into the restricting hole 1514. This state is maintained.

  FIG. 6 is a diagram illustrating a state in which the support slide fixing unit fixes the arm slide unit at a predetermined position of the support column. FIG. 6A illustrates an aspect ratio of the projection area of approximately “4: 3”. FIG. 6B is a diagram fixed at a position where the aspect ratio of the projection region is approximately “16:10”, and FIG. 6C is a diagram where the aspect ratio of the projection region is It is the figure fixed in the position used as about "16: 9". With reference to FIG. 6, the projection area secured on the screen body 12 by fixing the arm slide portion 19 will be described.

  As shown in FIG. 6A, when the support slide fixing portion 192 (arm slide portion 19) is fixed at the position of the first fixing hole 1511 (see FIG. 5A) as a predetermined position, the image The projection area A of the image light formed on the front side of the screen main body 12 on which the light is incident secures an area having an aspect ratio of approximately “4: 3” as indicated by a two-dot chain line.

  Next, from this state, the user operates the fixing operation unit 1922 while grasping the grasping unit 155 and the slide grasping unit 1923 to slide the slide grasping unit 1923 (the column slide fixing unit 192) downward. When the column slide fixing portion 192 is fixed at a position of the second fixing hole 1512 (see FIG. 5A) as a predetermined position, as shown in FIG. B secures an area having an aspect ratio of approximately “16:10” as indicated by a two-dot chain line.

  Next, in the same manner, when the support slide fixing portion 192 is fixed at a position of the third fixing hole 1513 (see FIG. 5A) as a predetermined position, as shown in FIG. The image light projection area C secures an area having an aspect ratio of approximately “16: 9” as indicated by a two-dot chain line. Thus, in the present embodiment, the aspect ratios of the projection areas A, B, and C formed on the screen body 12 are made to correspond to the three types of aspect ratios of the image light.

  FIG. 7 is a perspective view showing a schematic configuration of the support leg. FIG. 7 is a perspective view of the support leg 20 as viewed from the front side of the screen 1. FIG. 7 shows a state in which the leg portion 21 of the support leg 20 is separated (deployed) to the maximum with respect to the fixed column 15. With reference to FIG. 7, the structure of the support leg 20 is demonstrated.

  The support leg 20 is a part that supports the image projection unit 10. In the present embodiment, the support leg 20 is a fixed column 15 (second fixed column 152), three leg units 21, a leg fixing unit 22, and a leg slide unit 23. And is configured.

  The second fixed column 152 is formed of a hollow columnar member extending in the vertical direction and having a substantially horizontal track section. The second fixed column 152 and the first fixed column 151 constitute the fixed column 15. After the first fixed column 151 is inserted from the upper end of the second fixed column 152 and the extension length of the first fixed column 151 is adjusted, the first fixed column 151 is fixed to the second column by the column fixing unit 153. The image projection unit 10 can be supported and fixed by being fixed to the support column 152.

  The leg portion 21 extends in three directions, and each leg portion 21 is constituted by a multistage link mechanism of each member, as will be described later. Then, as shown in FIG. 7, each leg 21 is maximally separated (deployed) from the fixed column 15 (second fixed column 152) (this state is referred to as an open state). It can be. In this state, the leg portion 21 raises and supports the image projection unit 10 while raising the second fixed column 152. The open state is a state of the leg portion 21 when the screen 1 is in use.

  In addition, each leg portion 21 is in a state where it is closest (folded) to the fixed column 15 (second fixed column 152) (this state is referred to as a closed state (see FIG. 8)). Can do. The closed state is a state when the leg portion 21 is stored, and is a state of the leg portion 21 that is suitable when the screen 1 is not used (during transportation or storage).

  In the present embodiment, in the three leg portions 21, one leg portion 21 is developed in a substantially vertical direction with respect to the screen body 12 on the front side of the screen 1. Let this leg 21 be a leg 21A. In the present embodiment, the other two legs 21 are developed on the back side of the screen 1 by being developed in a direction rotated about 120 ° with respect to the legs 21A around the fixed column 15. Yes. The two legs 21 are referred to as legs 21B and 21C, respectively.

  The leg fixing part 22 is a member that pivotally supports the three leg parts 21 to be fixed to the second fixing column 152. The leg slide portion 23 is a member that is slidably supported along the second fixed column 152 and pivotally supports the three leg portions 21 in a rotatable manner. The leg slide portion 23 is slid along the second fixed column 152 so as to be separated from and close to the leg fixing portion 22, so that the three leg portions 21 constituted by a multistage link mechanism are driven. The leg 21 is brought close (folded) and separated (deployed).

  Each of the three leg portions 21 includes a first leg portion 211, a second leg portion 212, a third leg portion 213, and a leg regulating member 214. In addition, since the three leg parts 21 have the same member and are similarly comprised, below, it demonstrates centering on one leg part 21 (leg part 21A).

  The first leg 211 has a hollow columnar shape and is formed of a prismatic rod-like member. One end portion is formed of a synthetic resin member that has high frictional resistance and does not damage the installation surface. The installation surface 500 (see FIG. 9). It has a contact part 2111 that contacts.

  The second leg portion 212 has a hollow column shape, and is composed of two second leg members 212A and 212B having the same shape and formed by a prismatic rod-shaped member. As shown in FIG. 7, the two second leg members 212 </ b> A and 212 </ b> B are installed in parallel to each other, and one end of each sandwiches the side part on the other end side of the first leg 211. In this state, the first leg portion 211 is pivotally supported and connected by a common rotation shaft 2112. Further, as shown in FIG. 7, the other end portions of the two second leg members 212A and 212B are pivotally supported and connected to a leg fixing portion 22 described later.

  The third leg portion 213 is a hollow columnar member, and is formed of a prismatic rod-like member. As shown in FIG. 7, one end is sandwiched between substantially the intermediate portions of the second leg portion 212 (second leg members 212A and 212B). In this state, the second leg portion 212 is pivotally supported and connected by a common rotation shaft 2123. Further, as shown in FIG. 7, the other end of the third leg 213 is pivotally supported and connected to a leg slide part 23 described later.

  The leg restricting member 214 is formed of a round bar metal member, and as shown in FIG. 7, the leg restricting member 214 has a connection portion 2141 whose both ends are bent substantially perpendicularly in the same direction. As shown in FIG. 7, the leg restricting member 214 has a connecting portion 2141 that is one end portion inserted into a connecting hole formed in the other end portion of the first leg portion 211, and the connecting portion 2141 that is inserted therethrough. The first leg 211 is pivotally supported so as to be connected with the rotation axis. In addition, as shown in FIG. 7, the leg restricting member 214 has a connecting portion 2141 that is the other end inserted through a connecting hole formed in a substantially middle portion of the third leg 213, and the inserted connecting portion 2141 is inserted. As the pivot shaft, the third leg 213 is pivotally supported and connected.

  As shown in FIG. 7, the leg fixing portion 22 is formed to extend in a two-stage cylindrical shape, and has a leg fixing portion main body 221 that is inserted and fixed through the lower end portion of the second fixing column 152. Further, the leg fixing part 22 has a leg fixing shaft support part 222 formed to protrude in the normal direction in three predetermined directions on the cylindrical side surface on the lower end side of the leg fixing part main body 221. In the present embodiment, the predetermined three directions are the same as the directions in which the leg portions 21 (21A, 21B, 21C) are deployed. As shown in FIG. 7, the leg fixing shaft support 222 of the leg fixing part 22 is sandwiched between the other ends of the second leg 212 (second leg members 212A and 212B) and is connected to a common rotation. The second leg 212 is pivotally supported by the moving shaft 2222 and connected.

  As shown in FIG. 7, the leg slide portion 23 has a leg slide portion main body 231 that extends in a cylindrical shape, is inserted through the second fixed column 152, and is slidable along the second fixed column 152. . Further, the leg slide portion 23 has a leg slide shaft support portion 232 formed to protrude in the same direction as the three directions of the leg fixing shaft support portion 222 formed on the leg fixing portion 22 on the outer side surface of the leg slide portion main body 231. Configured. Further, as shown in FIG. 7, the leg slide portion 23 is provided with an extension of the second fixed column 152 on the upper side of the outer side of the leg slide portion main body 231 and on the opposite side of the screen main body 12 side. It has a grip portion 233 that is substantially orthogonal to the direction, extends in the horizontal direction (left-right direction of the screen 1), and is formed in a cylindrical shape.

  The leg slide shaft support part 232 is formed with a guide groove 2321 having a concave shape that is notched from the side surface on the front end side and recessed from the upper side to the lower side. As shown in FIG. 7, the leg slide shaft support portion 232 is configured such that the other end portion of the third leg portion 213 is guided inside the guide groove 2321, and the third leg portion is supported by the common rotation shaft 2323. 213 is pivotally supported and connected.

  FIG. 8 is a perspective view showing the support leg in the closed state. FIG. 9 is a plan view of the closed support leg as viewed from the left. FIG. 10 is a plan view of the support leg in the open state when viewed from the left. FIG. 8 is a perspective view of the support leg 20 as seen from the front side of the screen 1. FIG. 9 is a view of the support leg 20 in the closed state shown in FIG. 8 as viewed from the left. FIG. 10 is a plan view of the open support leg 20 shown in FIG. 7 as viewed from the left. 9 and 10 also show an installation method in the case where the support legs 20 are installed on an installation surface 500 such as a floor surface.

  7 to 10, the image projection unit 10 is omitted, but in the present embodiment, the image projection unit 10 can be inserted into and removed from the first fixed column 151 so that the first fixed column 151 can slide on the second fixed column 152. It is impossible to insert and install. In the present embodiment, since the image projection unit 10 and the support legs 20 constituting the screen 1 are integrally configured, the image projection unit 10 and the support legs 20 cannot be separated as separate bodies.

  With reference to FIGS. 7 to 10, the operation of unfolding and folding the support leg 20 will be described. In addition, since the three leg parts 21 are comprised similarly and operate | moved similarly, below, it demonstrates focusing on the one leg part 21 (leg part 21A).

  When unfolding the leg 21 of the support leg 20, as shown in FIG. 9, first, the user closes the screen body 12 of the image projection unit 10 and closes the leg 21 of the support leg 20. The screen 1 in a state is in a state in which the lower end surface 2211 of the leg fixing portion 22 is in contact with the installation surface 500 with the support leg 20 on the lower side. When the leg portion 21 of the support leg 20 is in the closed state, in this embodiment, the lower end surface 2211 as the end portion surface of the leg fixing portion 22 is one end portion of the first leg portion 211 as shown in FIG. It protrudes with respect to the end surface 2111a of the contact portion 2111. Therefore, when the screen 1 (support leg 20) is brought into contact with the installation surface 500 substantially perpendicularly, the lower end surface 2211 of the leg fixing portion 22 is in contact with the installation surface 500, and the end surface 2111a of the first leg portion 211 is contacted. Is in a state of being separated (floated) from the installation surface 500.

  In this state, the user holds the image projecting unit 10 while holding the holding unit 233 of the leg slide unit 23 and applies a force in the downward direction (the direction of the installation surface 500) to push down. Following this operation, the leg slide unit 23 starts to slide downward. Following this operation, the third leg portion 213 pivotally supported by the leg slide shaft support portion 232 slides downward and rotates around the rotation shaft 2323. The third leg portion 213 in the leg portion 21 </ b> A shown in FIG. 9 rotates clockwise about the rotation shaft 2323.

  The third leg portion 213 slides downward and is rotated about the rotation shaft 2323, and the second leg portion 212 is rotatably connected by the third leg portion 213 and the rotation shaft 2123. However, it rotates around the rotation axis 2123. In addition, the second leg portion 212 rotates about the rotation shaft 2222 of the leg fixing shaft support portion 222. The second leg 212 in the leg 21 </ b> A shown in FIG. 9 rotates counterclockwise around the rotation shaft 2222.

  In addition, since the leg regulating member 214 connects the third leg 213 and the other end of the first leg 211 so as to be pivotable by the connecting part 2141, the second leg 212 has the pivot shaft 2222. , The first leg portion 211 rotatably connected to the second leg portion 212 is rotated around the rotation shaft 2112 while being regulated by the leg regulating member 214. The first leg 211 in the leg 21 </ b> A shown in FIG. 9 rotates around the rotation shaft 2112 while being regulated by the leg regulating member 214.

  The above-described operation describes the operation of the series of leg portions 21 while the user slides the leg slide portion 23 downward by pressing the grip portion 233 downward. When the leg slide portion 23 is slid downward, the three leg portions 21 (21A, 21B, 21C) connected to the leg slide portion 23 perform the above-described operation almost simultaneously, and the leg portion 21 is developed. A multistage link mechanism operates in the direction. As a result, as shown in FIG. 10, the leg portion 21 </ b> A expands in a substantially vertical direction with respect to the screen body 12 on the front side of the screen 1. Further, the other leg portions 21B and 21C are also developed in the respective directions.

  Note that, as described above, FIG. 10 shows the open state in which the leg portion 21 is fully developed. In this case, the end surface 2111a of the contact portion 2111 formed at the tip of the first leg portion 211 is Abuts on the installation surface 500. In this state (open state), the lower end surface 2211 of the leg fixing portion 22 is slightly separated from the installation surface 500.

  When the leg 21 starts to be expanded from the closed state and the tip of the end surface 2111a of the contact portion 2111 comes into contact with the installation surface 500, the user lifts the fixed column 15 and slides the leg. By pushing down the gripping part 233 of the part 23, the lower end surface 2211 of the leg fixing part 22 can be brought into a state slightly separated from the installation surface 500 (state shown in FIG. 10).

  In the open state, the leg slide part 23 abuts on the upper end surface 2212 (see FIG. 9) of the leg fixing part main body 221 of the leg fixing part 22. That is, by sliding the leg slide part 23 until it abuts on the upper end surface 2212 of the leg fixing part main body 221, the leg part 21 is opened. As a result of the series of operations described above, the leg portion 21 is fully unfolded and stretched by the multi-stage link mechanism, as shown in FIGS. 7 and 10, and is stably fixed to the installation surface 500. be able to.

  7 and 10 can be changed from the open state to the closed state of the leg portion 21 shown in FIGS. 8 and 9 by performing the reverse operation described above. Specifically, the user grips the grip portion 233 of the leg slide portion 23 and applies an upward force to slide the leg slide portion 23 upward along the second fixed column 152. The multi-stage link mechanism of the leg portion 21 performs the reverse operation as described above and can be brought into a closed state.

  FIG. 11 is a perspective view showing the screen with the screen body closed, FIG. 11A is a perspective view with the legs closed, and FIG. 11B shows the legs open. It is a perspective view in a state. Moreover, Fig.11 (a) has shown the state which accommodated the leg part 21, and has shown the state suitable when the screen 1 is conveyed or stored. FIG. 11B shows a state before the screen body 12 is unfolded after the leg 21 is opened when the screen 1 is used. In addition, FIG. 11 has shown the state which looked at the screen 1 from the back side similarly to the figure shown in FIG.

  In the image projection unit 10, the screen 1 is wound around the spring roll 132 by the user holding the first holding unit 133 and the second holding unit 143 and pressing the screen 1 toward the fixed column 15. However, the first pantograph mechanism 16 and the second pantograph mechanism 17 move so as to contract. And as shown to Fig.11 (a), the side surface which the 1st support part 13 and the 2nd support part 14 oppose is faced | matched. In the present embodiment, the opposing side surfaces of the first support portion 13 and the second support portion 14 are the surrounding first support housings 131 that form the opening 1311 (see FIG. 2) of the first support portion 13. And the outer peripheral surface of the surrounding second support housing 141 forming the opening 1411 (see FIG. 1) of the second support portion 14.

  Further, in the first support portion 13, fixing convex portions 136 are installed on the upper and lower portions of the opening 1311 of the first support housing 131 as shown in FIG. 2 or FIG. 12 described later. Further, in the second support portion 14, fixing concave portions 146 are installed on the upper and lower portions of the opening 1411 of the second support housing 141 as shown in FIG. 1 or FIG. 12 described later. When the opposing side surfaces of the first support part 13 and the second support part 14 are abutted, the fixing convex part 136 of the first support part 13 and the fixing concave part 146 of the second support part 14 are respectively By engaging, the first support portion 13 and the second support portion 14 are fixed. In addition, in order to fix the 1st support part 13 and the 2nd support part 14 as mentioned above, you may fix using a magnetic member etc.

  As described above, in a state where the opposite side surfaces of the first support portion 13 and the second support portion 14 are abutted and fixed, the first pantograph mechanism 16 and the second pantograph mechanism 17 sandwiching the fixed column 15 are fixed. In the left-right direction of the support column 15, the first support portion 13 and the second support portion 14 are folded to the back side to be in a compact state. In the present embodiment, the first pantograph mechanism 16 and the second pantograph mechanism 17 are installed so as to minimize the separation distance from the screen main body 12, so that the first support part 13 and the second support part are provided. 14 is installed close to the back side. In this state, in the image projection unit 10, the support slide unit 191 and the support slide fixing unit 192 constituting the arm slide unit 19 are separated from each other.

  Further, as shown in FIG. 11 (a), the support leg 20 folds the leg 21 and closes it by pressing the grip 233 upward and sliding the leg slide 23 upward. It will be in the state which fits compactly centering on the 2nd fixed support | pillar 152. FIG. The user can move (carry) the screen 1 in a state where the image projection unit 10 and the support leg 20 are compactly accommodated as described above. Further, the screen 1 in such a state can be stored without taking a space in the storage place.

  As shown in FIG. 11B, when the screen 1 is used, when the leg 21 of the support leg 20 is first opened by the user, the leg 21 is formed by a multistage link mechanism. Therefore, the leg slide portion 23 can be widely deployed with a small slide amount as compared with the conventional one that does not include a multistage link mechanism. In addition, after making the leg part 21 of the support leg 20 into an open state, as mentioned above, the image projection part 10 is expand | deployed.

  FIG. 12 is a plan view when the screen is viewed from above. FIG. 12 is a plan view of the screen 1 in a use state, and the leg portion 21 of the support leg 20 is also unfolded in a state in which the first support portion 13 and the second support portion 14 of the image projection portion 10 are unfolded. It is in a state. In FIG. 12, the front side of the screen 1 on which the image light is projected is a downward direction in the drawing, and the back side of the screen 1 is an upward direction in the drawing.

  As shown in FIG. 11 or FIG. 12, the screen 1 of the present embodiment has two divided configurations of a first pantograph mechanism 16 and a second pantograph mechanism 17 in the image projection unit 10. The first pantograph mechanism 16 and the second pantograph mechanism 17 are set to be parallel to the screen main body 12 so that the distance from the screen main body 12 is narrowed to be the shortest in the same manner as the fixed support 15. 15 is installed in the left-right direction with the approximate center. The first support part 13 and the second support part 14 are fixed by the first pantograph mechanism 16 and the second pantograph mechanism 17.

  With this configuration, the first support portion 13, the second support portion 14, the first pantograph mechanism 16, and the second pantograph mechanism 17 are brought as close as possible to the fixed column 15. With this configuration, the screen 1 is thinned from the front side to the back side of the screen 1 (in the front-rear direction of the screen 1). Further, the screen 1 brings the weight balance center of the image projection unit 10 in the front-rear direction closer to the fixed support 15. Further, by arranging the spring roll 132 inside the first support housing 131 and the coil spring 142 inside the second support housing 141, the center of balance of the weight in the left-right direction of the image projection unit 10 is fixed to the fixed support column. 15 is substantially matched.

  Moreover, the support leg 20 is comprised by the leg part 21 which employ | adopted the multistage link mechanism. The support leg 20 is a front surface side of the screen 1, a leg portion 21 </ b> A that extends in a substantially vertical direction with respect to the screen body 12, and a direction rotated about 120 ° with respect to the leg portion 21 </ b> A around the fixed column 15. The two legs 21 </ b> B and 21 </ b> C are developed on the back side of the screen 1. With these three legs 21, the support leg 20 stably fixes the image projection unit 10. Further, the legs 21B and 21C arranged on the back side of the screen 1 are arranged so as to narrow the distance between the wall and the image projection unit 10 when the screen 1 is installed near the wall.

According to the embodiment described above, the following effects can be obtained.
(1) The screen 1 of the present embodiment is provided with a fixed support 15 (second fixed support 152), three legs 21, a leg fixing part 22, and a leg slide part 23 in the support leg 20. The fixed support column 15 supports the image projection unit 10, and the three leg portions 21 are configured to have a multi-stage link mechanism, and the fixed support column 15 is raised and supported, thereby raising the image projection unit 10. And support. The leg fixing part 22 is pivotally supported by the three leg parts 21 and fixed to the fixed support column 15. Moreover, the leg slide part 23 is slidably supported along the fixed support | pillar 15, and supports the three leg parts 21 so that rotation is possible. Then, the leg slide part 23 slides so as to be separated from and close to the leg fixing part 22, so that the multistage link mechanism is driven to bring the three leg parts 21 close (folded) and separated (deployed).

  As described above, when the leg slide portion 23 is separated from the leg fixing portion 22, the support leg 20 has a single link mechanism due to the close proximity of the three leg portions 21 having a multistage link mechanism. Compared with the leg part comprised by this, it can fold more compactly. Accordingly, it is possible to reduce the size of the leg portion 21 when it is stored. Further, when the leg slide part 23 is close to the leg fixing part 22, the three leg parts 21 having a multi-stage link mechanism are separated from each other, so that the leg part constituted by a single link mechanism is obtained. In comparison, the leg slide part 23 can be developed so as to have a wide development area by reducing the slide amount. Therefore, the efficiency and ease of the unfolding operation of the support leg 20 can be realized. Thus, the screen 1 with improved portability and operability of the support leg 20 can be realized.

  (2) In the support leg 20 of the present embodiment, the three legs 21 each include a first leg 211, a second leg 212, a third leg 213, and a leg restricting member 214, and a multistage link mechanism. Configure. The leg slide portion 23 slides away from and approaches the leg fixing portion 22, whereby the third leg portion 213 whose other end is pivotally supported by the leg slide portion 23 is driven. The second leg 212 connected at one end of the tripod 213 to the substantially intermediate portion is rotated. When the second leg 212 rotates, the first leg 211 connected to one end of the second leg 212 on the other end side rotates while being regulated by the leg regulating member 214. . By this operation, the three legs 21 are brought close to and away from each other. Thereby, the screen 1 having the same effect as described above can be realized with a simple configuration.

  (3) In the support leg 20 of the present embodiment, the lower end surface 2211 serving as the end surface of the leg fixing portion 22 protrudes from the end surface 2111a of one end portion of the first leg portion 211. Thereby, when the support leg 20 is installed on the installation surface 500, the lower end surface 2211 of the leg fixing portion 22 can be first brought into contact with the installation surface 500. As a result, the support leg 20 can be placed on the installation surface 500 in a more stable manner as compared with the case where the leg portion 21 brought into proximity is first brought into contact with the installation surface 500. Next, in a state where the lower end surface 2211 of the leg fixing portion 22 is placed (abutted) on the installation surface 500, the leg slide portion 23 is slid so that the end surface 2111a of the first leg portion 211 becomes the installation surface. It is also possible to easily deploy until it comes into contact with 500. Thereafter, by further sliding the leg slide portion 23, the leg portion 21 can be fully deployed and the fixed column 15 can be erected. In addition, when the leg portion 21 is folded, it can be performed by performing an operation reverse to the above. Accordingly, it is possible to realize the screen 1 that improves the operability with respect to the expansion and folding of the support leg 20.

  (4) In the screen 1 of the present embodiment, in the support leg 20, the fixed support 15, the first leg 211, the second leg 212, and the third leg 213 are formed by hollow columnar members. The rigidity force required for each member can be ensured. Further, when the leg portion 21 is expanded or stored (folded), the risk of pinching a finger or the like at the intersecting portion can be reduced as compared with a case where the plate member is formed by punching. Further, the weight of the support leg 20 can be reduced.

  (5) The screen 1 of the present embodiment can stably support the image projection unit 10 upright by the support legs 20 so that the image light can be projected onto the screen body 12 stably.

  (6) Although the image projection unit 10 and the support leg 20 are integrated in the screen 1 of the present embodiment, the image projection unit 10 can be reduced in weight and the support leg 20 can be downsized. Portability can be improved. Further, it is not necessary to assemble the image projection unit 10 on the support leg 20, and the convenience of the screen 1 can be improved.

  (7) The support leg 20 of the present embodiment is substantially the same with respect to the leg 21 </ b> A centering on the leg 21 </ b> A that extends in a substantially vertical direction with respect to the screen main body 12 on the front side of the screen 1. The two legs 21B and 21C are developed on the back side of the screen 1 by being developed in a direction rotated by 120 °. With these three legs 21, the support leg 20 stably fixes the image projection unit 10. Further, the leg portions 21B and 21C arranged on the back side of the screen 1 can be installed with a reduced distance between the wall and the image projection unit 10 when the screen 1 is installed near a wall or the like. Wasteful space can be reduced.

  In addition, it is not limited to embodiment mentioned above, It is possible to add and implement various changes, improvements, etc. A modification will be described below.

  (Modification 1) In the embodiment, the support leg 20 includes three leg portions 21 (21A, 21B, 21C). However, the present invention is not limited to this, and the support leg 20 may include four or more legs.

  (Modification 2) In the above-described embodiment, the leg portion 21 includes the first leg portion 211, the second leg portion 212, the third leg portion 213, and the leg regulating member 214 to constitute a multistage link mechanism. . However, the present invention is not limited to this, and the leg portion 21 may constitute a multistage link mechanism using other constituent members within a range that maintains the portability and operability of the support leg 20.

The perspective view which shows schematic structure of the screen which concerns on 1st Embodiment. The perspective view which shows schematic structure of a screen. The elements on larger scale when the principal part of a screen is seen from the back side. The top view which shows the structure of an urging | biasing part. Sectional drawing of a support | pillar slide fixing | fixed part. It is a figure which shows the state which the support | pillar slide fixing | fixed part fixed the arm slide part to the predetermined position of a fixed support | pillar, (a) is the figure fixed in the position where the aspect ratio of a projection area | region becomes substantially "4: 3". (B) is a figure fixed at a position where the aspect ratio of the projection area is approximately “16:10”, and (c) is a figure fixed at a position where the aspect ratio of the projection area is approximately “16: 9”. . The perspective view which shows schematic structure of a support leg. The perspective view which shows the support leg of a closed state. The top view at the time of seeing the support leg of a closed state from the left direction. The top view at the time of seeing the support leg of an open state from the left direction. It is a perspective view which shows the screen in the state which closed the screen main body, (a) is a perspective view in a leg part closed state, (b) is a perspective view in a leg part open state. The top view at the time of seeing a screen from the upper direction.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Screen, 12 ... Screen main body, 13 ... 1st support part, 14 ... 2nd support part, 15 ... Fixed support | pillar, 16 ... 1st pantograph mechanism, 17 ... 2nd pantograph mechanism, 18 ... Arm fixing part, 19 ... Arm slide part, 20 ... support leg, 21 ... leg part, 22 ... leg fixing part, 23 ... leg slide part, 132 ... spring roll, 134 ... first fixing part, 135 ... first slide fixing part, 142 ... coil spring , 144, second fixing portion, 145, second slide fixing portion, 151, first fixing column, 152, second fixing column, 161-164, 171-174, arm member, 191, column sliding portion, 192, column. Slide fixing portion 211 ... first leg portion 212 ... second leg portion 213 ... third leg portion 214 ... leg regulating member 500 ... installation surface 2111 ... contact portion 2111a ... end portion surface 22 1 ... lower end surface.

Claims (4)

A screen having a screen body onto which image light is projected,
The screen includes support legs;
The support leg is
A fixed support for supporting the screen body;
A plurality of legs configured to stand upright and support the fixed column, and to have a multi-stage link mechanism;
A leg fixing part that pivotally supports the plurality of leg parts to be fixed to the fixed support;
A leg slide part that is slidably supported along the fixed column and pivotally supports the plurality of leg parts, and
The screen is characterized in that the leg slide part slides so as to be separated from and close to the leg fixing part, so that the multi-stage link mechanism is driven to bring the plurality of leg parts close and separate. The screen according to claim 1,
The plurality of legs are
A first leg that abuts one end against the installation surface;
One end portion is connected to the other end portion side of the first leg portion to pivotally support the first leg portion, and the other end portion is pivotally supported to the leg fixing portion. A second leg to be
One end portion is connected to a substantially intermediate portion of the second leg portion to pivotally support the second leg portion, and the other end portion is pivotally supported to the leg slide portion. A third leg,
A leg restricting member having one end rotatably connected to the end of the first leg and the other end rotatably connected to a substantially intermediate portion of the third leg. To configure the multi-stage link mechanism,
The leg slide portion slides so as to be separated from and close to the leg fixing portion, so that the third leg portion rotates the second leg portion and is connected to the second leg portion. A screen characterized in that the plurality of legs are brought close to and separated from each other while one leg is regulated by the leg regulating member. The screen according to claim 1 or 2, wherein
When the plurality of legs are brought close to each other, an end surface of the fixed column or the leg fixing portion is equal to or protrudes from an end surface of the one end of the first leg. Feature screen. It is a screen as described in any one of Claims 1-3,
The said fixed support | pillar, the said 1st leg part, the said 2nd leg part, and the said 3rd leg part are formed with the member of a hollow column shape, The screen characterized by the above-mentioned.

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