JP2018136424A - Screen device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling suspended screen device capable of allowing images from a projector to be preferably projected on the screen.SOLUTION: A ceiling suspended screen device in an embodiment includes: a spring roll which is rotatably disposed in a casing; and a screen which is rewound by the spring roll when stored, and fed out when from the spring roll when used. A stop means is further provided at the end portion of the spring roll for stopping the fed-out screen at a predetermined position. The ceiling suspended screen device further includes: gear unit to which the stopping means is rotatably connected to an end portion of the spring roll in a side view; and a locking part which is engageable with a groove formed among plural projections which are disposed along the outer periphery of the gear unit.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a screen device. In particular, the present invention relates to a ceiling-type screen device.

  Conventionally, a suspended screen device has been used. A suspended screen device is generally used in combination with a projector. Specifically, the screen that is a component of the ceiling-suspended screen device is pulled down in one direction, and an image from the projector is projected onto the screen. In the ceiling-suspended screen device, a cylindrical cam mechanism for stopping the screen at an arbitrary position is provided at the end of the screen roll (see Patent Document 1). The cylindrical cam mechanism is provided with a groove on the cylindrical surface, and the groove has a region where a sliding ball acting to stop the screen at an arbitrary position can be locked.

JP 2004-333603 A

  Here, the inventors of the present application have found that the following problems occur in the ceiling-suspended screen device.

  Specifically, when the present inventors unwind the screen in a substantially vertical downward direction, the unwound screen does not extend as a whole (in a substantially vertical downward direction) as a whole. We found that the local part is curved. The occurrence of the curvature of the local portion of the screen leads to the fact that the image cannot be suitably projected from the projector onto the screen as a whole.

  The present invention has been made in view of such circumstances. That is, an object of the present invention is to provide a ceiling-type screen device capable of suitably projecting an image from a projector onto a screen.

In order to achieve the above object, in one embodiment of the present invention, there is a suspended screen device,
A spring roll provided rotatably in the casing, and a screen that is rewound onto the spring roll during storage and unwound from the spring roll during use,
Stop means for stopping the screen to be unwound at a predetermined position is further provided at the end of the spring roll, and the stop means is a gear that is rotatably connected to the end of the spring roll in a side view. A ceiling-suspended screen device is provided that includes a locking portion that can be locked to a groove formed between a plurality of protrusions and a plurality of protrusions arranged along the outer periphery of the gear portion.

  In a preferable aspect, 50 to 100 protrusions are formed along the outer periphery of the gear portion.

  In a preferred aspect, the ceiling-suspended screen device further includes a handle portion for releasing the locking of the locking portion to the groove portion.

In a preferred aspect, the ceiling-suspended screen device further includes an end bar receiving portion for receiving an end bar provided at an end portion of the screen, and a swivel portion that can come into contact with the locking portion,
The end bar receiving part and the swivel part form an integral structure.

  In a preferred aspect, the swivel portion includes a flexure portion, and the flexure portion can come into contact with a protrusion provided on a main surface of a side plate disposed on a side portion of the casing.

  According to the ceiling-suspended screen device of the present invention, it is possible to suitably project an image from the projector onto the screen.

FIG. 1 is a schematic overall view of a suspended screen apparatus according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of a side portion of the casing. FIG. 3 is a schematic side view of a side portion of the casing. FIG. 4 is a schematic side view showing a state in which the locking portion is locked to the gear portion. FIG. 5 is a schematic side view showing a state in which the locking between the locking portion and the gear portion is released. FIG. 6 is a schematic side view showing the operation of the handle portion. FIG. 7 is a schematic side view showing the operation of the swivel unit that is integrated with the end bar receiving unit. FIG. 8 is a schematic side view showing the operation of the swivel unit integrally formed with the end bar receiving unit. FIG. 9 is a schematic side view showing a state before the start of screen unwinding. FIG. 10 is a schematic side view showing a state after the start of screen unwinding. FIG. 11 is a schematic side view showing a state when the screen is stopped at a predetermined location. FIG. 12 is a schematic side view showing a state at the start of screen rewinding. FIG. 13 is a schematic side view showing a state during screen rewinding. FIG. 14 is a schematic side view showing a state when screen rewinding is completed.

  Hereinafter, a suspended screen apparatus according to an embodiment of the present invention will be described with reference to the drawings.

  Hereinafter, before specifically describing a ceiling-suspended screen device according to an embodiment of the present invention, terms used in this specification are defined. As used herein, the “ceiling-type screen device” refers to a screen device having a pattern in which a screen is unwound in a substantially vertical downward direction from a casing disposed at a predetermined location. The “casing” in the present specification refers to a housing member for housing a screen and a spring roll around which the screen is wound. The term “spring roll” as used herein refers to a roll that can freely wind a screen urged by a spring member (spring), and one end and the other end of which are pivotally supported inside the casing. Point to. The “stop means” in the present specification refers to a means for realizing stop at a predetermined position of the unwound screen. The “gear portion” in the present specification refers to a portion in which a plurality of protrusions are formed at a predetermined interval along the entire outer periphery and can rotate with the rotation of the spring roll. The “protrusion portion of the gear portion” referred to in the present specification refers to a convex and / or tooth-shaped member formed at a predetermined interval along the entire outer periphery. The “groove portion of the gear portion” as used in this specification refers to a concave-shaped space region formed between one projection portion and the other projection portion adjacent to each other formed along the outer periphery of the gear portion. Point to. The term “locking” as used in this specification refers to engaging and stopping. The “locking portion” in the present specification refers to a member having a tip portion (claw portion) having substantially the same shape as the space region formed by the groove portion of the gear portion.

  In addition, the “handle portion” in this specification is for releasing the locking portion of the locking portion to the groove portion of the gear portion, and is capable of pressing the protruding portion of the locking portion. Point to. In other words, the “handle portion” in the present specification is a handle portion that is operated by a human hand in a broad sense, and in a narrow sense is a handle portion that releases the locking portion of the locking portion with respect to the groove portion of the gear portion. Point to. That is, the “handle portion” in this specification can be referred to as an unlocking portion. The term “end bar” as used herein refers to an end bar extending in one direction along the longitudinal portion of the other side (lower end) of the screen opposite to one side (upper end) of the screen connected to the spring roll. It refers to the existing bar member. The “end bar receiving portion” in the present specification refers to a portion for receiving the end bar of the screen in a broad sense and a portion for receiving one end portion of the end bar of the screen in a narrow sense. As used herein, the term “swivel part” refers to a part that can pivot in a broad sense, a part that can pivot clockwise or counterclockwise from a pivotal support in a narrow sense, and a narrower meaning. It refers to one that can be rotated clockwise or counterclockwise with the shaft support portion as a base point so as to press the stop portion or to be pressed by the locking portion. As used herein, the “flexible part” refers to a flexible part that can be bent and deformed. The term “side casing plate” as used herein refers to a plate member that closes the open region of the side portion of the casing. The term “protruding portion of the side plate of the casing” as used herein refers to a convex-shaped member formed on the outer main surface of the side plate of the casing in a broad sense, and a flexure portion of the swivel portion in a narrow sense. The convex-shaped member located in the location which can contact with is pointed out.

<Configuration of ceiling-suspended screen device>
Hereinafter, the overall configuration of a ceiling-suspended screen device according to an embodiment of the present invention will be described.

  FIG. 1 is a schematic overall view of a suspended screen apparatus according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of a side portion of the casing. FIG. 3 is a schematic side view of a side portion of the casing. FIG. 4 is a schematic side view showing a state in which the locking portion is locked to the gear portion. FIG. 5 is a schematic side view showing a state in which the locking between the locking portion and the gear portion is released. FIG. 6 is a schematic side view showing the operation of the handle portion. FIG. 7 is a schematic side view showing the operation of the swivel unit that is integrated with the end bar receiving unit. FIG. 8 is a schematic side view showing the operation of the swivel unit integrally formed with the end bar receiving unit.

  As shown in FIG. 1, a ceiling-suspended screen device 100 according to an embodiment of the present invention includes a spring roll 20 that is rotatably provided in a casing 10, and a screen 30 that can be wound around the spring roll 20. It has. The screen 30 is configured to be rewound onto the spring roll 20 when stored and to be unwound from the spring roll 20 when used. The ceiling-suspended screen device 100 according to an embodiment of the present invention further includes a stopping means 40 for stopping the unwound screen 30 at a predetermined position at the end 21 of the spring roll 20. As shown in FIG. 1, the ceiling-suspended screen device 100 according to an embodiment of the present invention may further include a rotary damper 80 that is pivotally supported on the end portion 21 of the spring roll 20. The rotary damper 80 is for reducing the rotational speed of the spring roll 20. That is, the rotary damper 80 functions as a rotation speed reduction member for the spring roll.

  As shown in FIGS. 2 to 5, the stopping means 40 includes a gear part 41 and a locking part 42. The gear portion 41 is rotatably connected to the end portion 21 of the spring roll 20. As a result, the gear portion 41 can be rotated clockwise or counterclockwise along with the clockwise or counterclockwise rotation of the spring roll 20 from the connection portion with the end portion 21 of the spring roll 20 as a base point. ing. The gear part 41 has a substantially circular shape in a side view, and a plurality of protrusions 41 </ b> X are provided along the outer periphery of the gear part 41. A groove 41Y is formed between one protrusion 41X and the other protrusion 41X adjacent to each other. In addition, when the gear part 41 rotates clockwise in a side view, the groove part 41Y has a structure in which a distal end part 42Z of a locking part 42 described later does not enter the groove part 41Y.

  On the other hand, the locking part 42 is pivotally supported by the side plate 10X that functions as a lid of the side part of the casing 10, and the other end 42Z can be locked in a groove part 41Y formed in the gear part 41. . That is, the locking part 42 is configured to be rotatable with the pivotal support part 42X as a base point. In addition, the gear part 41 has a diameter dimension which can be accommodated in the surface area | region of the side plate 10X by side view. That is, the diameter dimension of the gear part 41 is determined depending on the size of the surface area of the side plate 10X. Therefore, the number of protrusions 41X provided along the outer periphery of the gear part 41 also substantially depends on the size of the surface area of the side plate 10X. Therefore, in view of the practical size of the surface area of the side plate, the protrusion 41X is not particularly limited, but 50 to 100, preferably 60 to 90, for example, 80 are formed along the outer periphery thereof. It's okay. The above numerical value definition is merely an example, and the number of protrusions 41X may exceed 100, for example, 120. In particular, according to the present invention, since the gear portion 41 has a substantially circular shape in a side view as described above, the number of the protrusion portions 41X provided along the outer periphery thereof is determined by using a conventional cylindrical cam mechanism. It is advantageous in that it can be increased relatively considerably in comparison with.

  Moreover, the latching | locking part 42 has the protrusion part 42Y for a handle part to press the latching | locking part 42, when a handle part mentioned later is operated on a main surface. A biased member 43 that is biased by the spring member 44 is positioned in an upper region of the locking portion 42. The biased member 43 includes penetrating regions 43X and 43Y in which the shaft support portion 42X and the protruding portion 42Y of the locking portion 42 can extend. The biased member 43 is connected to an enclosure portion 10Y positioned so as to face the side plate 10X. The surrounding portion 10Y surrounds components provided on the main surface of the side plate 10X in a side view, such as the gear portion 41, the locking portion 42, and the biased member 43. Since the protruding portion 42Y of the locking portion 42 extends through the penetrating region of the biased member 43, the locking portion 42 protrudes along with the rotational movement of the locking portion 42 with the shaft support portion 42X as a base point. The portion 42Y presses the wall of the biased member 43 that forms the penetrating region 43Y, so that the biased member 43 can also rotate and move away from the groove portion 41Y of the gear portion 41. As described above, since the biased member 43 is biased by the spring member 44, the degree of rotational movement of the biased member 43 from the groove portion 41Y of the gear portion 41 can be relatively reduced. Become. Therefore, due to this, when the locking portion 42 located in the lower region of the biased member 43 rotates so as to be separated from the groove portion 41Y of the gear portion 41 with the shaft support portion 42X as a base point, the locking portion The movement of the projecting portion 42Y of 42 is restrained by the wall forming the penetrating region 43Y of the biased member 43 with a relatively small degree of rotational movement, and thereby locked outside the longitudinal axis of the spring member 44. It can suppress that the front-end | tip part 42Z of the part 42 moves relatively large.

  As will be described in the following description of the operation, when the distal end portion 42Z (corresponding to the claw portion) of the locking portion 42 is locked to the groove portion 41Y, the rotation of the gear portion 41 is maintained by the locking portion 42. If the rotation stop of the gear part 41 is maintained, the rotation stop of the spring roll 20 that rotates in association with the rotation movement of the gear part 41 is maintained. By maintaining the rotation stop of the spring roll 20, it is possible to maintain the stop at a predetermined position of the unrolled screen 30. In particular, in the embodiment of the present invention, the gear portion 41 has a substantially circular shape in a side view, and therefore, a plurality of (for example, 50 to 100) protrusions 41X are provided along the outer periphery of the gear 41. Is possible. Therefore, the arrangement interval of the groove portions 41Y of the gear portion 41 can be relatively reduced. As a result, compared with the conventional mode using the cylindrical cam mechanism (the number of regions in which the sliding ball can be locked: usually about 10 maximum in consideration of the diameter of the spring roll), the locking portion 42 is at a predetermined position. It is possible to relatively reduce the interval between the engagement with the groove 41Y formed in the first and the subsequent engagement with the groove 41Y formed at a location different from the predetermined location. Thereby, after the screen 30 stops at a predetermined location due to the engagement of the locking portion 42 with the groove 41Y formed at the predetermined location, the locking portion 42 is formed at a location different from the predetermined location. The stop interval of the screen 30 until the screen 30 stops at a different location different from the predetermined location due to the locking with the groove 41Y can be made relatively small.

  In the aspect using the conventional cylindrical cam mechanism, when the screen is unwound to a predetermined position in the substantially vertical downward direction due to the relatively small number of regions where the sliding ball can be locked, the unwinding is performed. Even if the local part of the screen is curved, it is considered that it is necessary to apply a tensile force to the screen by further unwinding the relatively large screen from the predetermined position in the substantially vertical downward direction. On the other hand, in one embodiment of the present invention, when the screen 30 is unwound to a predetermined position in a substantially vertical downward direction due to the relatively small stop interval of the screen 30 being wound. Even if the local portion of the projected screen 30 is curved, a tensile force can be applied to the screen 30 by further unwinding of the relatively small screen 30 in the substantially vertical downward direction from the predetermined location. And the curvature of the local part of the screen 30 can be suitably eliminated by applying the said tensile force. Further, the further unwinding of the relatively small screen leads to substantially saving the trouble of adjusting the projection position of the image from the projector with respect to the screen 30. From the above, the present invention is advantageous in that an image can be suitably projected as a whole from the projector onto the screen 30 by further unwinding of a relatively small screen.

  As shown in FIGS. 2, 3 and 6, a handle portion 70 is pivotally supported on the side plate 10 </ b> X of the casing 10. That is, the handle part 70 is configured to be rotatable around the pivotal support part 70X. The handle portion 70 includes a protruding portion 70Y that can press the protruding portion 42Y of the locking portion 42. Accordingly, when the handle portion 70 is rotated with the pivotal support portion 70 </ b> X as a base point, the protruding portion 42 </ b> Y of the locking portion 42 can be pressed by the protruding portion 70 </ b> Y of the handle portion 70. By this pressing, the locking state of the locking portion 42 to the groove portion 41Y at a predetermined location can be released. The handle portion 70 is urged by a spring member 71. Therefore, it is possible to apply a biasing force that returns the handle portion to the direction opposite to the direction in which the protruding portion of the locking portion 42 is pressed with the shaft support portion 70X as a base point, that is, the initial position.

  As shown in FIGS. 3 and 7, a swivel portion 51 that can come into contact with the locking portion 42 is pivotally supported on one main surface of the side plate 10 </ b> X. That is, the turning part 51 is configured to be rotatable about the pivotal support part 51X. Specifically, the turning portion 51 is configured to be rotatable clockwise or counterclockwise with the pivotal support portion 51X as a base point. Further, the turning portion 51 is positioned so as to be sandwiched between the side plate 10X and the surrounding portion 10Y (specifically, a protrusion extending in a substantially vertical direction with respect to the main surface of the surrounding portion 10Y). ing. An end bar receiving portion 52 for receiving the end bar 60 provided at the lower end portion of the screen 30 is provided on the other main surface side of the side plate 10X. As will be described later, the swivel part 51 and the end bar receiving part 52 form an integral structure as a whole.

As an example, a case where the unlocked locking portion 42 rotates and moves away from the groove 41Y with the shaft support portion 42X as a base point is taken as an example. In this case, the locking part 42 that rotates rotates presses the turning part 51. By this pressing, the turning portion 51 rotates clockwise with the shaft support portion 51X as a base point (see FIGS. 7 and 8). When the swivel unit 51 is rotated clockwise, the end bar receiving unit 52 integrated with the swivel unit 51 is also moved accordingly. Moreover, the turning part 51 has the bending part 51Y in the main surface. Furthermore, the main surface of the side plate 10X that faces the path through which the bending portion 51Y passes along with the rotational movement of the turning portion 51 has a protruding portion 10X that can come into contact with the bending portion 51Y at a predetermined position during the rotational movement of the turning portion 51. ₁ is provided. Therefore, when the swivel unit 51 rotationally moves clockwise, flexure 51Y at a predetermined position during the rotation movement is in contact with the protruding portion 10X ₁ of the side plates 10X, it by rotational movement speed of the clockwise turning portion 51 Can be loosened intentionally. Thereby, the rotational movement speed of the latching | locking part 42 which presses the turning part 51 can also be loosened. Therefore, it is possible to prevent the unlocked locking portion 42 from being separated more than necessary from the groove 41Y with the shaft support portion 42X as a base point.

  As another example, a case where the end bar 60 is received by the end bar receiving portion 52 is taken as an example. In this case, the end bar receiving portion 52 for receiving the end bar 60 is compared with the end bar receiving portion 52 before receiving the end bar 60 because the swivel portion 51 integrated with the end bar receiving portion 52 is rotatably supported. And move slightly upward. Along with the movement of the end bar receiving portion 52, the turning portion 51 rotates counterclockwise with the shaft support portion 51X as a base point (see FIGS. 7 and 8). When the turning unit 51 rotates counterclockwise, the turning unit 51 can press the locking part 42 after coming into contact with the locking part 42 that has been released from the locking and moved away from the groove 41Y. . Accordingly, the locking portion 42 (specifically, the distal end portion 42Z of the locking portion 42) can be rotated and moved so as to approach the groove 41Y side, that is, the gear 41 side, with the shaft support portion 42X as a base point.

<Operation of the suspended screen device>
Hereinafter, the operation of the ceiling-type screen device according to the embodiment of the present invention will be described with reference to the drawings.

  FIG. 9 is a schematic side view showing a state before the start of screen unwinding. FIG. 10 is a schematic side view showing a state after the start of screen unwinding. FIG. 11 is a schematic side view showing a state when the screen is stopped at a predetermined location. FIG. 12 is a schematic side view showing a state at the start of screen rewinding. FIG. 13 is a schematic side view showing a state during screen rewinding. FIG. 14 is a schematic side view showing a state when screen rewinding is completed.

(Before starting screen unwinding)
Before the start of screen unwinding, the end bar 60 provided at the lower end of the screen is completely received by the end bar receiving portion 52 as shown in FIG. In this state, the end bar receiving portion 52 that completely receives the end bar 60 is provided before the end bar 60 is received because the swivel portion 51 integrated with the end bar receiving portion 52 is rotatably supported. It is in a state where it has moved slightly in the upward direction. Along with this, the turning part 51 is rotated counterclockwise from the pivotal support part 51X, and as a result, the turning part 51 presses the locking part 42 after contacting the locking part 42. It is possible. Thus, the locking portion 42 can be rotated and moved to the groove portion 41Y side, that is, the gear portion 41 side, with the shaft support portion 42X as a base point. Therefore, the front end portion 42Z of the locking portion 42 can be brought close to the groove portion 41Y side formed in the gear portion 41. From the above, as shown in FIG. 9, before the start of screen unwinding, the front end portion 42Z of the locking portion 42 is in a state of being close to the groove portion 41Y.

(After starting screen unwinding)
Next, from the state before the start of screen unwinding, the screen 30 is unwound in the vertically downward direction with the end bar 60 of the screen 30 as shown in FIG. When the unwinding of the screen 30 is started, the spring roll starts to rotate clockwise in a side view by the unwinding. When the spring roll starts to rotate clockwise, the gear part 41 positioned at the end of the spring roll also starts to rotate clockwise as shown in FIG. When the gear portion 41 rotates clockwise, as described above, the groove portion 41Y has a structure in which the tip end portion 42Z of the locking portion 42 does not enter the groove portion 41Y. Can be unwound.

(Predetermined part of the screen stops)
Next, unwinding stop at a predetermined position of the screen 30 is started. As the unwinding stop is started, the clockwise rotation of the spring roll is stopped in a side view. When the clockwise rotation of the spring roll is stopped, the clockwise rotation of the gear portion 41 positioned at the end of the spring roll is also stopped as shown in FIG. When the rotation of the gear portion 41 is stopped, the distal end portion 42Z of the locking portion 42 enters the groove portion 41Y at a predetermined location of the gear portion 41, whereby the distal end portion 42Z of the locking portion 42 is the groove portion 41Y at a predetermined location of the gear portion 41. Lock to.

  When the distal end portion 42Z of the locking portion 42 is locked to the groove portion 41Y, the locking portion 42 maintains the clockwise rotation stop of the gear portion 41. When the clockwise rotation stop of the gear unit 41 is maintained, the clockwise rotation stop of the spring roll 20 that rotates in association with the clockwise rotation of the gear unit 41 is maintained. By maintaining the clockwise rotation stop of the spring roll 20, it is possible to maintain the stop at a predetermined position of the unwound screen 30.

  Here, when the end bar 60 of the screen 30 stopped and maintained at a predetermined position is held and slightly unwound in the vertically downward direction, and the gear part 41 is slightly rotated clockwise, the gear part 41 is viewed in a side view. When rotating clockwise, the distal end portion 42Z of the locking portion 42 is locked into the groove portion 41Y because the distal end portion 42Z of the locking portion 42 does not enter the groove portion 41Y. It can be canceled. In particular, in the embodiment of the present invention, the gear portion 41 has a substantially circular shape in a side view, and therefore, a plurality of (for example, 50 to 100) protrusions 41X are provided along the outer periphery of the gear 41. Is possible. Therefore, the arrangement interval of the groove portions 41Y of the gear portion 41 can be relatively reduced. As a result, compared with the conventional mode using the cylindrical cam mechanism (the number of regions in which the sliding ball can be locked: usually about 10 maximum in consideration of the diameter of the spring roll), the locking portion 42 is at a predetermined position. It is possible to relatively reduce the interval between the engagement with the groove 41Y formed in the first and the subsequent engagement with the groove 41Y formed at a location different from the predetermined location. Thereby, after the screen 30 stops at a predetermined location due to the engagement of the locking portion 42 with the groove 41Y formed at the predetermined location, the locking portion 42 is formed at a location different from the predetermined location. The stop interval of the screen 30 until the screen 30 stops at a different location different from the predetermined location due to the locking with the groove 41Y can be made relatively small.

  Thereby, even when the local portion of the unwound screen 30 is curved when the screen 30 is unwound to a predetermined position in the substantially vertical downward direction, the screen is relatively small in the substantially vertical downward direction from the predetermined position. With 30 further unwinding, a tensile force can be applied to the screen 30. That is, in one embodiment of the present invention, it is possible to apply a tensile force to the screen 30 without further unwinding of the relatively large screen 30 in a substantially vertical downward direction from a predetermined location. And the curvature of the local part of the screen 30 can be suitably eliminated by applying the said tensile force. Further, the further unwinding of the relatively small screen leads to substantially saving the trouble of adjusting the projection position of the image from the projector with respect to the screen 30. From the above, the present invention is advantageous in that an image can be suitably projected as a whole from the projector onto the screen 30 by further unwinding of a relatively small screen.

(Screen rewinding start and screen rewinding in progress)
After the projection of the local portion of the screen 30 is eliminated and a suitable projection from the projector onto the screen 30 is completed, the screen 30 starts to be rewound. As shown in FIG. 12, when starting rewinding of the screen 30, the handle portion 70 pivotally supported on the side plate 10 </ b> X of the casing 10 is used. In particular. A handle portion 70 is used that is rotatable about the pivot portion 70X. As described above, the handle portion 70 includes the protruding portion 70Y that can be pressed against the protruding portion 42Y of the locking portion 42. When the handle portion 70 is rotated with the pivotal support portion 70X as a base point, the protruding portion 70Y of the handle portion 70 contacts the protruding portion 42Y of the locking portion 42 and presses the protruding portion 42Y. By this pressing, the locking state of the locking portion 42 to the groove portion 41Y at a predetermined location can be released. When the locking is released, the spring roll connected to the gear 41 is biased by the spring member, so that the spring roll starts to rotate in the direction of rewinding the screen in a side view, that is, counterclockwise. The rewinding of the screen 30 connected to the spring roll can be started by the counterclockwise rotation of the spring roll.

  Further, as described above, the biased member 43 biased by the spring member 44 is positioned in the upper region of the locking portion 42, and the biased member 43 is a shaft support portion of the locking portion 42. The portion 42X and the protruding portion 42Y are provided with penetrating regions 43X and 43Y that can extend. Since the protruding portion 42Y of the locking portion 42 extends through the penetrating region of the biased member 43, the protruding portion of the locking portion 42 accompanies the rotational movement of the locking portion 42 with the shaft support portion 42X as a base point. 42Y presses the wall of the biased member 43 that forms the penetrating region 43Y, whereby the biased member 43 can also rotate and move away from the groove 41Y of the gear portion 41. Since the biased member 43 is biased by the spring member 44, the degree of rotational movement of the biased member 43 from the groove portion 41Y of the gear portion 41 can be relatively reduced.

  Therefore, due to this, when the locking portion 42 located in the lower region of the biased member 43 rotates so as to be separated from the groove portion 41Y of the gear portion 41 with the shaft support portion 42X as a base point, the locking portion The movement of the projecting portion 42Y of 42 is restrained by the wall forming the penetrating region 43Y of the biased member 43 with a relatively small degree of rotational movement, and thereby locked outside the longitudinal axis of the spring member 44. It can suppress that the front-end | tip part 42Z of the part 42 moves relatively large. As a result, it is possible to relatively reduce the amount of rotational movement and / or the rotational movement time of the locking portion 42 toward the groove portion 41Y with a shaft support portion 42X described later as a base point.

  Since the handle portion 70 is biased by the spring member 71 as described above, a biasing force is applied in a direction opposite to the direction in which the protruding portion 42Y of the locking portion 42 is pressed with the shaft support portion 70X as a base point. Can be made. Thereby, as shown in FIG. 13, the handle portion 70 can be returned to the initial position while the screen 30 is being rewound.

  Further, as shown in FIG. 12, when the locking portion 42 is rotated and moved away from the groove portion 41Y with the shaft support portion 42X as a base point by the pressing force of the handle portion 70, the locking portion 42 is rotated and moved. The stop part 42 presses the turning part 51 after coming into contact with the turning part 51 that is arranged close to the locking part 42 so as to be in contact therewith. By this pressing, the turning part 51 rotates clockwise with the shaft support part 51X as a base point. When the turning part 51 rotates clockwise, the end bar receiving part 52 integrated with the turning part 51 also moves in the arrow direction shown in FIG.

As described above, the swivel part 51 has the bending part 51Y on its main surface. Further, on the main surface of the side plate 10X facing the path through which the bending portion 51Y passes along with the rotational movement of the turning portion 51, the protruding portion 10X that can come into contact with the bending portion 51Y at a predetermined position during the rotational movement of the turning portion 51. ₁ is provided. Therefore, when the swivel unit 51 is rotated and moved clockwise, flexure 51Y at a predetermined position during the rotation movement is in contact with the protruding portion 10X ₁ of the side plates 10X, clockwise rotation of the pivot portion 51 thereby The moving speed can be intentionally relaxed. Thereby, the rotational movement speed of the latching | locking part 42 which presses the turning part 51 can also be loosened. Therefore, it is possible to prevent the unlocked locking portion 42 from being separated more than necessary from the groove 41Y with the shaft support portion 42X as a base point.

(Screen rewinding complete)
When the rewinding of the screen 30 is completed, the end bar 60 provided at the lower end portion of the screen 30 is completely received by the end bar receiving portion 52 as shown in FIG. In this state, the end bar receiving portion 52 that completely receives the end bar 60 is provided before the end bar 60 is received because the swivel portion 51 integrated with the end bar receiving portion 52 is rotatably supported. It is in a state where it has moved slightly in the upward direction. Along with this, the turning part 51 is rotated counterclockwise from the pivotal support part 51X, and as a result, the turning part 51 presses the locking part 42 after contacting the locking part 42. It is possible. Thus, the locking portion 42 can be rotated and moved to the groove portion 41Y side, that is, the gear portion 41 side, with the shaft support portion 42X as a base point. Therefore, the front end portion 42Z of the locking portion 42 can be brought close to the groove portion 41Y side formed in the gear portion 41. By the above, it can be set as the state before the above-mentioned unwinding start which is in the state where tip part 42Z of locking part 42 approached groove part 41Y (refer to Drawing 9).

  The ceiling-suspended screen device according to one embodiment of the present invention has been described above. However, it will be understood that the invention is not limited thereto and that various changes can be made by those skilled in the art without departing from the scope defined in the claims.

  A ceiling-suspended screen device according to an embodiment of the present invention can be used to mount a projector, particularly an ultra-short focus projector.

DESCRIPTION OF SYMBOLS 10 Casing 10X Side plate of a casing 10X ₁ Projection part provided to the main surface of the side plate of a casing 10Y Enclosure part (The thing arrange | positioned facing the side plate of a casing)
DESCRIPTION OF SYMBOLS 20 Spring roll 21 End part of spring roll 30 Screen 40 Stop means 41 Gear part 41X Projection part of gear part 41Y Groove part of gear part 42 Locking part 42X Shaft support part 42Y Locking part protrusion 42Z Locking Tip portion 43 biased member 43X penetrating region of biased member 43Y penetrating region of biased member 44 spring member 51 swivel portion 51X pivot support portion 51Y swivel flexure portion 52 end bar receiving portion 60 screen End bar 70 Handle part 70X Shaft support part 70Y Projection part of handle part 71 Spring member 80 Rotary damper 100 Ceiling-type screen device

Claims (5)

A suspended screen device,
A spring roll rotatably provided in the casing, and a screen that is rewound onto the spring roll during storage and unwound from the spring roll during use,
Stopping means for stopping the unwinded screen at a predetermined position is further provided at the end of the spring roll, and the stopping means is rotatable to the end of the spring roll in a side view. A ceiling-suspended screen device, comprising: a gear portion connected to the groove portion; and a locking portion that can be locked to a groove portion formed between a plurality of protrusions arranged along the outer periphery of the gear portion.   The ceiling-suspended screen device according to claim 1, wherein 50 to 100 protrusions are formed along the outer periphery of the gear portion.   The ceiling-suspended screen device according to claim 1 or 2, further comprising a handle portion for releasing the locking of the locking portion to the groove portion. An end bar receiving portion for receiving an end bar provided at an end portion of the screen, and a swivel portion configured to be in contact with the locking portion;
The ceiling-suspended screen device according to any one of claims 1 to 3, wherein the end bar receiving portion and the swivel portion form an integral structure.   The ceiling suspension according to claim 4, wherein the swivel portion includes a bending portion, and the bending portion is capable of contacting a protruding portion provided on a main surface of a side plate disposed on a side portion of the casing. Screen device.

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