Projection screen device

Abstract

The present invention provides a projection screen device that allows the shaft member and screen sheet to be easily attached to and detached from the fixing member (housing) after installation. [Solution] The screen device 1 comprises a screen sheet 2 on which a screen surface 2A is formed, a shaft member 4 around which the screen sheet 2 is wound, a housing 3 fixed to a structure, and a holding member 5 for the housing 3 to hold the shaft member 4. The screen sheet 2 can be unwound from and wound onto the shaft member 4. The holding member 5 comprises a fixed holding portion 51 provided on the housing 3 and a shaft holding portion 61 provided on the shaft member 4. The shaft member 4 is held by the housing 3 by detachably assembling the shaft holding portion 61 to the fixed holding portion 51.

Description

Technical Field

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[0001] The present invention relates to a projection screen device installed on a wall or ceiling of a structure or the like.

Background Art

[0002] Conventionally, in companies and schools, a projection screen device installed on a wall or ceiling of a structure or the like has been used as a screen for projecting an image by an image projector such as a projector. Such a projection screen device is known to include a screen sheet, a shaft member for winding up the screen sheet, and a fixing member (housing) fixed to the structure for holding the shaft member (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Patent Document 1 described above discloses a technique for adjusting the position of the rotation axis of the storage case with respect to the fixing member. According to such a configuration, the operation of removing the shaft member from the housing for replacing or maintaining the screen sheet becomes complicated, and the man-hours increase.

[0005] The present invention has been made in view of the above circumstances, and the problem to be solved by the present invention is to provide a projection screen device that enables the shaft member and the screen sheet to be easily attached to and detached from the fixing member (housing) after installation.

Means for Solving the Problems

[0006] Hereinafter, means for solving the above problems will be described.

[0007] The projection screen device according to the present invention comprises a screen sheet on which a screen surface is formed on at least one surface, a shaft member around which the screen sheet is wound, a fixing member fixed to a structure, and a holding member for the fixing member to hold the shaft member, wherein the screen sheet can be unwound from the shaft member and wound onto the shaft member, and the holding member comprises a fixing holding portion provided on the fixing member and a shaft holding portion provided on the shaft member, wherein the shaft member is held by the fixing member by detachably assembling the shaft holding portion to the fixing holding portion.

[0008] Furthermore, the fixing member is a long housing that houses the screen sheet in a wound state and the shaft member, and it is more preferable that the screen sheet can be unwound from the shaft member to the outside inside the housing and wound onto the shaft member.

[0009] Furthermore, it is more preferable that the fixing and holding portions are provided on both sides in the longitudinal direction of the housing, and that the shaft holding portions are provided on both ends of the shaft member.

[0010] Furthermore, the shaft holding portion is formed with an upper contact surface facing upward and front / rear contact surfaces facing forward or rear, and the fixed holding portion is formed with a lower contact surface facing downward and front / rear contact surfaces facing the front / rear contact surfaces, and it is more preferable that the shaft holding portion is assembled to the fixed holding portion with the upper contact surface in contact with the lower contact surface and the front / rear contact surfaces in contact with the front / rear contact surfaces.

[0011] Furthermore, it is more preferable that sound-dampening material is interposed between the upper contact surface and the lower contact surface, and / or between the front and rear contact surfaces and the front and rear contact surfaces.

[0012] Furthermore, it is preferable that the shaft holding portion has a dimpled hole that penetrates the upper contact surface and has a large hole and a small hole, and that the shaft holding portion is assembled to the fixed holding portion by screwing a screw member having a screw head larger than the small hole and smaller than the large hole through the dimpled hole to the lower contact surface.

[0013] Furthermore, the shaft holding portion is more preferably provided with a support portion that supports the end of the shaft member in an upward direction, and the support portion is provided so that the vertical position of the end can be changed.

[0014] Furthermore, the support portion comprises a fixing plate formed parallel to the horizontal plane in the shaft holding portion, and an adjustment screw that is screwed into a screw-in hole opened in the fixing plate from below, wherein the end of the shaft member is placed on the tip of the adjustment screw, and the vertical position of the end can be changed by adjusting the amount the adjustment screw is screwed into the screw-in hole.

[0015] Furthermore, it is more preferable that the holding member includes a biasing member that biases the end of the shaft member downward.

[0016] Furthermore, it is more preferable that the support portion includes a restricting member that restricts the rotation of the adjustment screw. [Effects of the Invention]

[0017] The projection screen device according to the present invention has the advantage that the shaft member and screen sheet can be easily attached to and detached from the fixing member after installation. [Brief explanation of the drawing]

[0018] [Figure 1] A downward perspective view showing the usage state of a projection screen device according to one embodiment of the present invention. [Figure 2] A downward perspective view showing the projection screen device with its cover open. [Figure 3] A downward perspective view showing the projection screen device with the axial member removed. [Figure 4] An enlarged perspective view showing the configuration of the left holding member. [Figure 5] An enlarged perspective view showing the configuration of the right holding member. [Figure 6] An enlarged perspective view showing a state where the connection of the left holding member is released. [Figure 7] An enlarged perspective view showing the state after the connection of the left holding member is released. [Figure 8] An enlarged perspective view showing a state where the regulation of the regulating member is released in the left holding member. [Figure 9] An enlarged cross-sectional view showing the configuration of the left holding member. [Figure 10] An enlarged cross-sectional view showing a state where the angle of the shaft member is adjusted in the left holding member.

Embodiments for Carrying Out the Invention

[0019] Hereinafter, with reference to FIGS. 1 to 10, a projection screen device 1 according to an embodiment of the present invention (hereinafter, simply referred to as "screen device") will be described. As shown in FIG. 1, the screen device 1 according to the present embodiment is used by being fixed to the wall or ceiling of a structure. The arrows shown in each figure indicate the directions in the use state of the screen device 1.

[0020] As shown in FIGS. 1 to 4, the screen device 1 includes a screen sheet 2, a shaft member 4 around which the screen sheet 2 is wound, and a long housing 3 that houses the wound screen sheet 2 and the shaft member 4.

[0021] The screen sheet 2 is capable of transitioning between a use state where it is paid out downward as shown in FIG. 1 and a storage state where it is wound around the upper shaft member 4. As shown in FIG. 1, a screen surface 2A is formed on the front side of the screen sheet 2. The screen surface 2A may be formed on at least one surface of the screen sheet 2, and it may be formed on the rear side or both surfaces of the screen sheet 2.

[0022] A resin tip support member 2B is fixed to the front end (lower end in Figure 1) of the screen sheet 2, extending in the left-right direction. The tip support member 2B functions as a gripping part when the user pulls out the screen sheet 2.

[0023] The shaft member 4 is a rotating shaft for winding the unwound screen sheet 2 into the housing 3. That is, the screen sheet 2 can be unwound from the shaft member 4 and wound onto the shaft member 4 by rotating the shaft member 4. The base end of the screen sheet 2 (the upper end in Figure 1) is fixed to a cylindrical member that is rotatably mounted on the shaft member 4 with the shaft member 4 as its center. The left and right ends of the shaft member 4 are supported by the housing 3 (more specifically, by the holding member 5 described later). The cylindrical member is biased in the direction of winding the screen sheet 2 by a winding spring (not shown).

[0024] The screen device 1 includes a housing 3, which is a long resin member that houses the screen sheet 2 when it is wound onto the shaft member 4. The housing 3 functions as a fixing member that holds the shaft member 4 while it is fixed to the wall or ceiling of the structure. It is also possible to configure the device so that the shaft member 4 and screen sheet 2 are not housed in the housing 3, but are simply assembled to the structure via a fixing member (in which case the shaft member 4 and screen sheet 2 are exposed).

[0025] The housing 3 is a hollow rectangular tubular member formed by a main body 31, a left side panel 32, a right side panel 33, a front cover 34, and a bottom cover 35. The main body 31 is formed so that the back panel 31a and the top panel 31b are perpendicular to each other, giving it an L-shaped cross-section. The left side panel 32 and the right side panel 33 close off the left and right ends of the main body 31, respectively. The front cover 34 closes off the front of the main body 31.

[0026] In this embodiment, equipment such as a control unit, motor, camera, microphone, and speaker of the screen device 1 (not shown) are arranged near the interior sides of the left panel 32 and the right panel 33. The motor is electrically connected to the control unit (not shown), and is configured to electrically extend and retract the screen sheet 2 under the control of the control unit. It is also possible to configure the system to manually extend and retract the screen sheet 2.

[0027] The lower cover 35 is assembled to the lower side of the main body 31 so as to be openable and closable. The rear of the lower cover 35 is open. Through this opening, the screen sheet 2 is unfurled from the shaft member 4 inside the housing 3 to the outside, and wound back onto the shaft member 4. The rear end of the lower cover 35 is rotatably assembled to the main body 31.

[0028] By operating the cover screw 35a that connects the front end of the lower cover 35 to the front cover 34, the lower cover 35 can be rotated downward as shown in Figures 2 and 3. This opens the lower part of the main body 31, making it possible to operate the inside of the housing 3 from below. Furthermore, if the front cover 34 is removed, it becomes possible to operate the inside of the housing 3 from the front as well.

[0029] As shown in Figures 4 and 5, the screen device 1 according to this embodiment is configured such that the housing 3, which is a fixed member, is equipped with a pair of left and right holding members 5-5 to hold both ends of the shaft member 4. Each of the holding members 5-5 is composed of a fixed holding portion 51-51 provided on both sides in the longitudinal direction of the housing 3 and a shaft holding portion 61-61 provided on both ends of the shaft member 4. Since the pair of left and right holding members 5-5 are configured similarly, the left holding member 5 will be described below based on the drawings, and a detailed description of the right holding member 5 will be omitted.

[0030] As shown in Figure 7, the shaft holding portion 61 is detachable from the fixed holding portion 51. By assembling the shaft holding portion 61 to the fixed holding portion 51 using each of the holding members 5, 5, the shaft member 4 and the screen sheet 2 are held in the housing 3. Furthermore, by separating the shaft holding portion 61 from the fixed holding portion 51 using each of the holding members 5, 5, the shaft member 4 and the screen sheet 2 can be removed from the housing 3, as shown in Figure 3.

[0031] As shown in Figures 4 to 8, the fixing and holding portion 51 is a metal member formed in a roughly L-shape when viewed from the side, and is fixed to the front surface of the back plate 31a and the underside of the top plate 31b along the main body portion 31. The fixing and holding portion 51 has a first lower contact surface 52 formed facing downward, a front and rear contact surface 53 formed facing forward, and a second lower contact surface 54 formed below the front and rear contact surface 53 and facing downward. Two female screw holes are opened in the first lower contact surface 52 and one female screw hole is opened in the second lower contact surface 54, and a total of three screw members S are screwed into each female screw hole.

[0032] As shown in Figures 4 to 8, the shaft holding portion 61 is a metal member formed in a substantially L-shape when viewed from the side, and is fixed along the fixed holding portion 51. The shaft holding portion 61 has a first upper contact surface 62 formed facing upward, a front and rear contact surface 63 formed facing backward, and a second upper contact surface 64 formed below the front and rear contact surface 63 and facing upward.

[0033] The shaft holding portion 61 holds the end of the shaft member 4 so that it can be displaced in the vertical direction. A retaining member 73 is provided on the upper side of the shaft member 4 in the shaft holding portion 61, and the retaining member 73 is biased from above by a leaf spring 74, which is a biasing member.

[0034] A restricting portion 65 is formed at the front end of the shaft holding portion 61. The restricting portion 65 contacts a restricted member 41 provided at the end of the shaft member 4, thereby restricting the rotational displacement of the shaft member 4 as the screen sheet 2 is unfurled.

[0035] When assembling the shaft holding portion 61 to the fixed holding portion 51 in the holding member 5, the first and second upper contact surfaces 62 and 64 are brought into contact with the first and second lower contact surfaces 52 and 54, respectively, and the front and rear contact surface 63 is brought into contact with the front and rear contact surfaces 53. This facilitates the positioning of the fixed holding portion 51 and the shaft holding portion 61.

[0036] The shaft holding portion 61 has thumbholes 62a and 64a that penetrate the first and second upper contact surfaces 62 and 64, and have a large hole at the rear and a small hole at the front. The screw member S is formed with a screw head that is larger than the small hole in the thumbholes 62a and 64a but smaller than the large hole. The screw member S is screwed into the first and second lower contact surfaces 52 and 54 through the thumbholes 62a and 64a. In this way, the shaft holding portion 61 is assembled to the fixed holding portion 51 by tightening the screw member S while it is inserted through the small hole in the thumbholes 62a and 64a.

[0037] On the other hand, by loosening the screw member S, the shaft holding portion 61 can be slid forward relative to the fixed holding portion 51, as shown in Figure 6. Also, by inserting the screw head of the screw member S into the large holes 62a and 64a, the shaft holding portion 61 can be separated from the fixed holding portion 51, as shown in Figure 7.

[0038] As described above, in the screen device 1 according to this embodiment, the shaft holding portion 61 and the fixed holding portion 51 can be attached and detached with a simple configuration. This allows the shaft member 4 and the screen sheet 2 to be easily removed from the housing 3, which is the fixed member. In particular, after the screen device 1 is installed on a structure, the shaft member 4 and the screen sheet 2 can be easily attached and detached from the housing 3 (with minimal effort) when replacing or maintaining the screen sheet 2.

[0039] In the screen device 1 according to this embodiment, as shown in Figure 7, sound-dampening material 55 is attached to the first lower contact surface 52 and the front and rear contact surfaces 53. As a result, when the shaft holding part 61 is assembled to the fixed holding part 51, the sound-dampening material 55 is interposed between the first upper contact surface 62 and the first lower contact surface 52, and between the front and rear contact surfaces 63 and the front and rear contact surfaces 53. Therefore, when the motor is driven, the vibration noise between the shaft holding part 61 and the fixed holding part 51 can be absorbed by the sound-dampening material 55, thereby improving the quietness of the screen device 1.

[0040] In the screen device 1 according to this embodiment, the front and rear contact surfaces 53 are formed facing forward, and the front and rear contact surfaces 63 are formed facing rearward. However, it is sufficient that the front and rear contact surfaces 53 and the front and rear contact surfaces 63 are formed facing each other in the front-rear direction. That is, it is also possible to form the front and rear contact surfaces 53 facing rearward and the front and rear contact surfaces 63 facing forward. In this case, the shaft holding portion 61 can be separated from the fixed holding portion 51 by sliding the shaft holding portion 61 backward relative to the fixed holding portion 51.

[0041] In the screen device 1 according to this embodiment, the shaft holding portion 61 provided on the left side includes a support portion 7 that supports the left end of the shaft member 4 in an upward direction. The support portion 7 is provided so that the vertical position of the left end of the shaft member 4 can be changed.

[0042] As shown in Figure 4, the support portion 7 is composed of a fixing plate 71 and an adjustment screw 72. The fixing plate 71 is formed parallel to the horizontal plane in the shaft holding portion 61 and extends outward in the left-right direction. The adjustment screw 72 is screwed into a screw-in hole opened in the fixing plate 71 from below.

[0043] As shown in Figure 9, the left end of the shaft member 4 is placed on the upper tip of the adjustment screw 72. Then, as shown in Figure 10, by rotating the adjustment screw 72 to adjust the amount the adjustment screw 72 is screwed into the screw hole in the fixing plate 71, the vertical position of the left end of the shaft member 4 can be changed.

[0044] Specifically, the adjustment screw 72 is rotated to increase the amount it is screwed upward into the fixing plate 71. This displaces the shaft member 4 so that its left end is higher, and the angle with respect to the housing 3 is adjusted. Conversely, to adjust the angle with respect to the housing 3 by displacing the left end of the shaft member 4 so that it is lower, the amount the adjustment screw 72 is screwed upward into the fixing plate 71 is reduced.

[0045] As described above, according to the screen device 1 of this embodiment, even if it is discovered after the screen device 1 has been installed that the shaft member 4 of the screen sheet 2 is tilted in the vertical direction, the angle of the shaft member 4 can be adjusted by operating the support part 7. In other words, with the screen device 1, if the tilt of the shaft member 4 is discovered after installation, the angle of the shaft member 4 can be adjusted without reinstalling the screen device 1, thereby preventing wrinkles from forming on the screen sheet 2.

[0046] Furthermore, with the screen device 1, the tilt of the shaft member 4 can be made zero by adjusting the angle of the shaft member 4. This prevents misalignment when winding the screen sheet 2. In other words, since it is not necessary to make the left and right ends of the screen sheet 2 smaller than the shaft member 4, it is possible to ensure the size of the screen sheet 2 relative to the shaft member 4.

[0047] In the screen device 1 according to this embodiment, the shaft holding portion 61 is equipped with a leaf spring 74 as a biasing member that biases the end of the shaft member 4 downward, as shown in Figure 4. Specifically, the leaf spring 74 biases the end of the shaft member 4 from above via a retaining member 73. This reduces the vibration of the shaft member 4 in the shaft holding portion 61 when the motor is driven, thereby suppressing the generation of vibration noise in the screen device 1. Furthermore, by rotating the adjustment screw 72, the leaf spring 74 is expanded and contracted via the fixed plate 71, the shaft member 4, and the retaining member 73, and the preload generated from the leaf spring 74 is adjusted in proportion to the spring constant, allowing it to be set to the pressure that best suppresses vibration noise in the screen device 1. In addition, other biasing members such as compression springs, air dampers with adjustable pressure in a rubber chamber, magnetic dampers using magnetic force, elastic materials using elastic rubber or elastomer materials, and air springs with sealed pistons containing pressurized air can also be suitably used.

[0048] In the screen device 1 according to this embodiment, the support portion 7 is configured to include a restricting member 76 that restricts the rotation of an adjustment screw 72 whose head is formed in the shape of a plate. In the shaft holding portion 61, the restricting member 76 is provided so as to be rotatable about a pivot axis 75. When the restricting member 76 is held by the holding plate 77 (see Figure 8), which is a metal plate, it is positioned close to the adjustment screw 72 as shown in Figure 9, and thus restricts the rotation of the adjustment screw 72. When the restricting member 76 is moved away from the holding plate 77 and displaced downward, the adjustment screw 72 becomes able to rotate as shown in Figure 10.

[0049] Thus, in this embodiment, by providing a restricting member 76 that restricts the rotation of the adjustment screw 72, it is possible to prevent the adjustment screw 72 from rotating accidentally and changing the angle of the shaft member 4. [Explanation of Symbols]

[0050] 1. Screen device (projection screen device) 2 Screen Sheet 2A Screen Surface 2B Tip support member 3 Housing (fixing member) 4. Axis member 5. Holding member 7 Support part 31 Main body 31a Back plate 31b Top panel 32 Left side panel 33 Right side plate 34 Front cover 35 Lower cover 41 Restricted member 51 Fixed holding part 52 First lower abutted surface 53 Front and rear abutted surfaces 54 Second lower abutted surface 55 Quiet material 61 Shaft holding part 62 First upper contact surface 62a Daruma hole 63 Front and rear contact surfaces 64 Second upper contact surface 64a Daruma hole 65 Regulatory Department 71 Fixing plate 72 Adjustment screw 73 Retaining member 74 Leaf spring (biasing member) 75 Rotary shaft 76 Regulating member 77 Holding plate S threaded component

Claims

1. A screen sheet having a screen surface formed on at least one of its surfaces, The axial member around which the screen sheet is wound, A fixing member that is fixed to the structure, The fixing member comprises a holding member for holding the shaft member, The screen sheet is capable of being unwound from the shaft member and wound onto the shaft member. The holding member comprises a fixed holding portion provided on the fixed member and a shaft holding portion provided on the shaft member, A projection screen device in which the shaft member is held by the fixed member by detachably assembling the shaft holding portion to the fixed holding portion.

2. The fixing member is a long housing that houses the screen sheet in a wound state and the shaft member. The projection screen device according to claim 1, wherein the screen sheet can be unwound from the shaft member inside the housing to the outside and wound onto the shaft member.

3. The aforementioned fixing and holding portions are provided on both sides of the housing in the longitudinal direction, The projection screen device according to claim 2, wherein the shaft holding portions are provided at both ends of the shaft member.

4. The shaft holding portion is formed with an upper contact surface facing upward and front and rear contact surfaces facing forward or backward. The fixed holding portion is formed with a downward contact surface formed facing downward, and front and rear contact surfaces formed opposite to the front and rear contact surfaces. The projection screen device according to claim 3, wherein the shaft holding portion is assembled to the fixed holding portion with the upper contact surface in contact with the lower contact surface and the front and rear contact surfaces in contact with the front and rear contact surfaces.

5. The projection screen device according to claim 4, wherein a sound-dampening material is interposed between the upper contact surface and the lower contact surface, and / or between the front and rear contact surfaces and the front and rear contact surfaces.

6. The shaft holding portion has a dagger-shaped hole that penetrates the upper contact surface and has both a large and a small hole. The projection screen device according to claim 5, wherein the shaft holding portion is assembled to the fixed holding portion by screwing a screw member having a screw head larger than the small hole and smaller than the large hole through the thumbhole into the lower contact surface.

7. The shaft holding portion includes a support portion that supports the end of the shaft member in an upward direction. The projection screen device according to claim 6, wherein the support portion is provided so that the vertical position of the end portion can be changed.

8. The support portion comprises a fixing plate formed parallel to the horizontal plane in the shaft holding portion, and an adjustment screw that is screwed into a screw-in hole opened in the fixing plate from below. The end of the shaft member is placed on the tip of the adjustment screw. The projection screen device according to claim 7, wherein the vertical position of the end portion can be changed by adjusting the amount of screwing the adjustment screw into the screw hole.

9. The projection screen device according to claim 8, wherein the holding member comprises a biasing member that biases the end of the shaft member downward.

10. The projection screen device according to claim 9, wherein the support portion includes a restricting member for restricting the rotation of the adjustment screw.

Images