Screen device

Abstract

The present invention provides a screen device that prevents short circuits when multiple electrical contacts are present. [Solution] The screen device of the present invention comprises a first electrical contact, a second electrical contact, a power receiving unit to which electricity is supplied via the first or second electrical contact, a screen, and a winding unit for winding up the screen, wherein while electricity is supplied to the power receiving unit via one of the first and second electrical contacts, the electricity supplied via one of them is not supplied to the other of the first and second electrical contacts.

Description

Technical Field

[0001] The present invention relates to a screen device.

Background Art

[0002] Conventionally, a screen device is used as a projection surface for projecting an image by an image projector such as a projector. The screen device described in Patent Document 1 below includes a screen, a housing that houses the screen, and a motor that winds up the screen into the housing. Since this screen device requires electricity to drive the motor, electricity is supplied from the outside via a power adapter or the like.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above-described electric screen device, in order to improve the installation freedom, it is conceivable to provide a plurality of electrical contacts such as a power inlet for connecting a power adapter. When a plurality of electrical contacts are provided in this way, there is a risk of short circuit because when electricity is applied to one electrical contact, the other electrical contacts also become energized.

Means for Solving the Problems

[0005] To solve the above problems, a screen device according to one aspect of the present invention comprises a first electrical contact, a second electrical contact, a power receiving unit to which electricity is supplied via the first or second electrical contact, a screen, and a winding unit for winding up the screen, wherein while electricity is supplied to the power receiving unit via one of the first and second electrical contacts, the electricity supplied via the one does not flow through the other of the first and second electrical contacts. [Brief explanation of the drawing]

[0006] [Figure 1] This is a front view of the screen device. [Figure 2A] This is a view of the screen device from the right side. [Figure 2B] This is a view of the screen device from the left side. [Figure 2C] This is a view of the screen device from below when the screen is retracted. [Figure 3] This is a cross-sectional view showing the main components of the weight section. [Figure 4A] This diagram shows the main components on the right side of the screen device. [Figure 4B] Figure 4A shows the cover member removed. [Figure 5A] This diagram shows the main components on the left side of the screen device. [Figure 5B] Figure 5A shows the cover member removed. [Figure 6] This is a block diagram showing the electrical configuration of the screen device. [Modes for carrying out the invention]

[0007] Hereinafter, an embodiment of the screen device of the present invention will be described with reference to the drawings. In the following drawings, the dimensions of each component may be shown on a different scale to make them easier to see. The screen device of this embodiment is a device that reflects projected light projected from a projection optical device such as a projector and displays it as an image on the interference side.

[0008] In the following explanation, the axis along the horizontal direction of the screen will be referred to as the X-axis, the axis along the vertical direction of the screen as the Y-axis, and the axis along the front direction of the screen as the Z-axis. That is, from the observer's perspective, the left-right direction corresponds to the X-axis direction, the up-down direction corresponds to the Y-axis direction, and the depth direction corresponds to the Z-axis direction. When describing the configuration and arrangement of each component below, the +X side will be referred to as the "right side," the -X side as the "left side," the +Y side as the "upper side," the -Y side as the "lower side," the +Z side as the "front side," and the -Z side as the "rear side." Furthermore, the left-right direction along the X-axis will be collectively referred to as the left-right direction X, and the up-down direction along the Y-axis will be collectively referred to as the up-down direction Y.

[0009] Figure 1 shows the screen device viewed from the front (+Z side). Figure 2A shows the screen device viewed from the right side (+X side). Figure 2B shows the screen device viewed from the left side (-X side). Figure 2C shows the screen device with the screen retracted, viewed from below (-Y side).

[0010] As shown in Figures 1, 2A, 2B, and 2C, the screen device 100 of this embodiment includes a screen 10, a winding unit 20 for winding up the screen 10, a first power inlet (first electrical contact) 30, a second power inlet (second electrical contact) 40, a power receiving unit 50, a lighting unit 60, a cover member 70, a weight unit 80, a ceiling mounting bracket 85, and a switch unit SW.

[0011] The screen 10 is used in a state where it is pulled out from the winding unit 20. As shown in Figure 1, the screen 10 is a sheet-like material and includes an image display area 11 and a height adjustment area 12. The image display area 11 is the area that displays the projected light from the projector as an image. The height adjustment area 12 is located above (+Y side) the image display area 11 and is an area for adjusting the vertical Y height of the image display area 11 by adjusting the amount it is pulled out from the winding unit 20. The height adjustment area may be made of a fabric that does not transmit light, or it may be made of a translucent or transparent fabric that transmits light.

[0012] The rectangular screen 10 has an upper end 10a connected to the winding section 20 and a lower end 10b opposite to the upper end 10a. A weight 80 is provided at the lower end 10b of the screen 10. The weight 80 applies a predetermined tension to the screen 10 when it is pulled out from the winding section 20 and functions as a weight to flatten the surface of the screen 10 when it is in use. As shown in Figure 2C, when the screen 10 is housed in the winding section 20, the weight 80 also functions as a cover that covers the housing opening 23K of the housing 23, which will be described later. The ceiling suspension bracket 85 is provided on the housing 23 and is used when installing the screen device 100 in a ceiling-suspended state. The screen device 100 can also be installed on a wall by fixing the notch 23c on the rear side (-Z side) of the housing 23 to a support pin 86 provided on the wall (see Figures 4A, B and 5A, B described later).

[0013] Figure 3 is a cross-sectional view showing the main components of the weight portion 80. Figure 3 is a diagram showing a cross-section of the weight portion 80 along the YZ plane which is aligned with the thickness direction of the screen 10. As shown in Figure 3, the weight portion 80 includes an engaging member 81 fixed to the lower end portion 10b of the screen 10, and a rod-shaped body 83 that engages with the engaging member 81. The rod-shaped body 83 has a slit 83K for pulling out the screen 10, and a locking piece 83a that engages with the engaging member 81 by locking onto it. The slit 83K is an opening that extends in the left-right direction X, and the width of the slit 83K in the left-right direction X is greater than the width of the screen 10 in the left-right direction X. The engaging member 81 is composed of a first portion 81a and a second portion 81b that sandwich the screen 10 in the thickness direction.

[0014] As shown in Figure 3, in a cross-section of the screen 10 along the YZ plane in the thickness direction, the rod-shaped body 83 has a constricted portion 84 where the internal space narrows towards the slit 83K. The engaging member 81 is thinner on the side opposite to the slit 83K (lower side) than on the side facing the slit 83K (upper side). The engaging member 81 hooks onto the locking piece 83a of the rod-shaped body 83, thereby fixing the lower end portion 10b of the screen 10 to the rod-shaped body 83.

[0015] According to this configuration, for example, when the lower end portion 10b of the screen 10 moves upward (+Y) with respect to the rod-shaped body 83, the thick portion of the engagement member 81 contacts the inner wall surface of the constriction 84, so that it is possible to prevent the weight portion 80 from coming off from the lower end portion 10b of the screen 10.

[0016] The winding unit 20 includes a winding core 21 fixed to the upper end portion 10a of the screen 10, a motor 22 that winds up the screen 10 by rotating the winding core 21, and a housing 23 that houses the screen 10 wound around the winding core 21. The housing 23 has an elongated shape extending in the left-right direction X. The housing 23 has a housing opening 23K for pulling out the screen 10. The screen device 100 of the present embodiment is an electric screen device that electrically drives the motor 22 that winds up the screen 10.

[0017] The first power inlet 30 and the second power inlet 40 are connection ports for supplying external electricity to the screen device 100. Electricity is supplied to the first power inlet 30 and the second power inlet 40 via a power cable.

[0018] The first power inlet 30 and the second power inlet 40 are provided in the housing 23 of the winding unit 20. The first power inlet 30 is provided at the right end portion 23a which is one end of the housing 23. The second power inlet 40 is provided at the left end portion 23b which is the other end of the housing 23. According to this configuration, since the first power inlet 30 and the second power inlet 40 are provided at both ends of the housing 23, access to the power inlets becomes easy. Therefore, the degree of freedom in installing the screen device 100 can be increased.

[0019] The power receiving unit 50 is supplied with electricity via the first power inlet 30 or the second power inlet 40. In this embodiment, the power receiving unit 50 consists of the motor 22 and the lighting unit 60 of the winding unit 20. The motor 22 and the lighting unit 60 are driven by the electricity supplied via the first power inlet 30 and the second power inlet 40. The lighting unit 60 is composed of, for example, LED elements and functions as indirect lighting that emits illumination light toward the ceiling of the room in which the screen device 100 is installed. The arrangement and configuration of the lighting unit 60 are not particularly limited. The lighting unit 60 may be driven by a battery instead of electricity supplied by, for example, the first power inlet 30 or the second power inlet 40. In this case, the lighting unit 60 is not included in the configuration of the power receiving unit 50.

[0020] Figures 4A and 4B show the main components of the right side (+X side) of the screen device. Figures 5A and 5B show the main components of the left side (-X side) of the screen device. Figures 4A and 4B show the power cable 90 connected to the first power inlet 30. Figures 5A and 5B show the power cable 90 connected to the second power inlet 40. For explanatory purposes, Figures 4A and 4B, and Figures 5A and 5B show the power cable 90 connected to both the first power inlet 30 and the second power inlet 40, but the power cable 90 is connected to only one of the two power inlets 30 or 40. Also, although the power cable 90 is long, only the portion connected to the inlet is shown.

[0021] As shown in Figures 4A, 4B and 5A, 5B, the cover member 70 is detachably attached to the housing 23 and covers the area where the first power inlet 30 and the second power inlet 40 are provided. The cover member 70 includes a first cover member 71 and a second cover member 72.

[0022] The first cover member 71 detachably covers the right end 23a of the housing 23, which is provided with the first power inlet 30. The first cover member 71 has a first opening 71a through which the power cable 90 connected to the first power inlet 30 is inserted. The first opening 71a prevents interference between the first cover member 71 and the power cable 90. By covering the area around the first power inlet 30 with the power cable 90 connected, the first cover member 71 can suppress the adhesion of foreign matter such as dust and debris to the connection point between the first power inlet 30 and the power cable 90.

[0023] The second cover member 72 detachably covers the left end portion 23b of the housing 23, which is provided with the second power inlet 40. The second cover member 72 has a second opening 72a through which the power cable 90 connected to the second power inlet 40 is inserted. The second opening 72a prevents interference between the second cover member 72 and the power cable 90. By covering the area around the second power inlet 40 with the power cable 90 connected, the second cover member 72 can suppress the adhesion of foreign matter such as dust and debris to the connection portion between the second power inlet 40 and the power cable 90.

[0024] In the screen device 100 of this embodiment, the switch unit SW is provided above (+Y) the second power inlet 40 at the left end 23b of the housing 23, as shown in Figure 5B. The switch unit SW is composed of, for example, a mechanical switch, but the configuration of the switch unit SW is not particularly limited. The switch unit SW may also be provided on the first power inlet 30 side at the right end 23a of the housing 23.

[0025] Figure 6 is a block diagram showing the electrical configuration of the screen device 100. As shown in Figure 6, the switch unit SW is electrically connected to the first power inlet 30 via the first wiring 91, to the second power inlet 40 via the second wiring 92, and to the power receiving unit 50 via the third wiring 93. The switch unit SW switches between a first energized state S1 in which electricity is supplied to the power receiving unit 50 via the first power inlet 30, and a second energized state S2 in which electricity is supplied to the power receiving unit 50 via the second power inlet 40. The switch unit SW can also be configured to a state in which no electricity is supplied to the power receiving unit 50 via either the first power inlet 30 or the second power inlet 40 (as shown by the solid line in Figure 6).

[0026] In the screen device 100 of this embodiment, when the power cable 90 is connected to the first power inlet 30, the switch unit SW switches to the first powered state S1. In the first powered state S1, the switch unit SW makes the first wiring 91 and the third wiring 93 conductive, but does not energize the first wiring 91 and the second wiring 92. In the screen device 100 of this embodiment, when the power cable 90 is connected to the second power inlet 40, the switch unit SW switches to the second powered state S2. In the second powered state S2, the switch unit SW makes the second wiring 92 and the third wiring 93 conductive, but does not energize the second wiring 92 and the first wiring 91. In the screen device 100 of this embodiment, while electricity is supplied to the power receiving unit 50 via one of the first power inlet 30 and the second power inlet 40, the electricity supplied via one inlet is not supplied to the other inlet.

[0027] According to the screen device 100 of this embodiment, the power inlet on the side to which the power cable 90 is not connected is not energized, thus preventing a short circuit from occurring in the power inlet on the side to which the power cable 90 is not connected. The screen device 100 of this embodiment allows for easy switching of which power inlet is energized using the switch SW.

[0028] The technical scope of the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention. For example, in the screen device 100 of the above embodiment, two power inlets were provided, but three or more power inlets may be provided. Also, although the first power inlet 30 and the second power inlet 40 were provided at both ends of the housing 23, the first power inlet 30 and the second power inlet 40 may be arranged together at one end.

[0029] Furthermore, although the above embodiment of the screen device 100 describes a method of use in which the screen 10 is pulled out from the upper side (+Y) to the lower side (-Y), the present invention is also applicable to a screen device that is installed on the floor and pulls up the screen from the lower side (-Y) to the upper side (+Y).

[0030] [Summary of this disclosure] A summary of this disclosure is provided below.

[0031] (Note 1) First electrical contact and, The second electrical contact and A power receiving unit to which electricity is supplied via the first electrical contact or the second electrical contact, The screen and, The system includes a winding unit for winding up the screen, While electricity is supplied to the power receiving unit through one of the first electrical contacts and the second electrical contacts, the electricity supplied through that one is not supplied to the other of the first electrical contacts and the second electrical contacts. Screen device.

[0032] With this configuration of the screen device, even if one electrical contact is energized, the other electrical contact remains unenergized, thus preventing a short circuit at the other electrical contact.

[0033] (Note 2) The device further includes a switch that can switch between a first energized state in which electricity is supplied to the power receiving unit via the first electrical contact and a second energized state in which electricity is supplied to the power receiving unit via the second electrical contact. The screen device described in Appendix 1.

[0034] This configuration allows for easy switching of the electrical contacts to a powered state using the switch unit.

[0035] (Note 3) The winding unit includes a motor for winding up the screen. The power receiving unit is the motor, The screen device described in Appendix 1 or Appendix 2.

[0036] This configuration makes it possible to realize an electrically powered screen in which the motor that winds up the screen is electrically driven.

[0037] (Note 4) It further includes a lighting unit that emits illumination light. A screen device as described in any one of the appendices 1 through 3.

[0038] With this configuration, the light emitted from the lighting unit can be used as indirect lighting.

[0039] (Note 5) The winding unit includes a housing that accommodates the wound-up screen, The first electrical contact and the second electrical contact are provided in the housing. A screen device as described in any one of the appendices 1 through 4.

[0040] This configuration allows for easy access to electrical contacts because they are provided on the casing.

[0041] (Note 6) The housing has an elongated shape, The first electrical contact is provided at one end of the housing, The second electrical contact is provided at the other end of the housing. The screen device described in Appendix 5.

[0042] This configuration allows for easy access to electrical contacts, as they are located at both ends of the housing. Therefore, it increases the flexibility in the installation of the screen device.

[0043] (Note 7) The housing is further provided with a cover member that is detachably attached to the housing and covers the portion where the first electrical contact and the second electrical contact are provided, The cover member has an opening through which a power cable connected to the first electrical contact and the second electrical contact is inserted. The screen device described in Appendix 5 or Appendix 6.

[0044] This configuration allows the cover member to prevent dust, debris, and other foreign matter from adhering to the connection point between the power inlet and the power cable. Furthermore, the opening prevents interference between the cover member and the power cable.

[0045] (Note 8) The screen further comprises a weight portion provided at the end opposite to the side connected to the winding portion, which applies a predetermined tension to the screen when it is in use. The weight portion includes an engaging member fixed to the screen and a rod-shaped body having a slit for pulling out the screen and engaging with the engaging member. In the cross-section of the screen in the thickness direction, The rod-shaped body has a constricted portion where the internal space narrows as it approaches the slit, The engaging member has a thickness on the side opposite the slit that is thinner than the thickness on the side with the slit. A screen device as described in any one of the appendices 1 through 7.

[0046] With this configuration, when the lower end of the screen moves upward within the rod-shaped body, the thicker portion of the upper engaging member comes into contact with the inner wall surface of the constricted section, preventing the weight from detaching from the lower end of the screen. [Explanation of Symbols]

[0047] 10...Screen, 20...Winding section, 22...Motor, 23...Housing, 23K, 71a, 72a...Opening, 30...First power inlet (first electrical contact), 40...Second power inlet (second electrical contact), 50...Power receiving section, 60...Lighting section, 70...Cover member, 80...Weight section, 81...Engaging member, 83...Rod-shaped body, 83K...Slit, 90...Power cable, 100...Screen device, S1...First energized state, S2...Second energized state, SW...Switch section.

Claims

1. First electrical contact and, The second electrical contact and A power receiving unit to which electricity is supplied via the first electrical contact or the second electrical contact, The screen and, The system includes a winding unit for winding up the screen, While electricity is supplied to the power receiving unit through one of the first electrical contacts and the second electrical contacts, the electricity supplied through that one is not supplied to the other of the first electrical contacts and the second electrical contacts. Screen device.

2. The device further includes a switch that can switch between a first energized state in which electricity is supplied to the power receiving unit via the first electrical contact and a second energized state in which electricity is supplied to the power receiving unit via the second electrical contact. The screen apparatus according to claim 1.

3. The winding unit includes a motor for winding up the screen. The power receiving unit is the motor, The screen apparatus according to claim 1 or claim 2.

4. It further includes a lighting unit that emits illumination light. The screen apparatus according to claim 1 or claim 2.

5. The winding unit includes a housing that accommodates the wound-up screen, The first electrical contact and the second electrical contact are provided in the housing. The screen apparatus according to claim 3.

6. The housing has an elongated shape, The first electrical contact is provided at one end of the housing, The second electrical contact is provided at the other end of the housing. The screen apparatus according to claim 5.

7. The housing is further provided with a cover member that is detachably attached to the housing and covers the portion where the first electrical contact and the second electrical contact are provided, The cover member has an opening through which a power cable connected to the first electrical contact and the second electrical contact is inserted. The screen apparatus according to claim 5.

8. The screen further comprises a weight portion provided at the end opposite to the side connected to the winding portion, which applies a predetermined tension to the screen when it is in use. The weight portion includes an engaging member fixed to the screen and a rod-shaped body having a slit for pulling out the screen and engaging with the engaging member. In the cross-section of the screen in the thickness direction, The rod-shaped body has a constricted portion where the internal space narrows as it approaches the slit, The engaging member has a thickness on the side opposite the slit that is thinner than the thickness on the side with the slit. The screen apparatus according to claim 1 or claim 2.

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